JP2018130118A - Transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transplanter capable of adjusting an intrarow spacing with a simple constitution.SOLUTION: The seedling transplanter includes: a planting clutch 420 switching an on state and off state of transmission of drive force for planting a seedling 22; a rotatable intermission cam 441 arranged on a transmission downstream side of the planting clutch 420; a restriction arm 460 turning transmission of the planting clutch 420 into the off state, based on a shape of the intermission cam 441; and a drive device 1400 turning the cutting off state of the planting clutch 420 into the on state by driving the restriction arm 460.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a transplanter for seedlings, seed pods and the like, and belongs to the technical field of agricultural machinery.

Conventionally, an operator manually supplies seed pods and seedling transplants prepared on a mounting table of a transplanter to a plurality of supply cups that are rotated and conveyed in a loop according to the traveling of the transplanter. In addition, there is known a transplanting machine that automatically implants the supplied transplant into a field via a planting tool (see, for example, Patent Document 1).

Moreover, the said conventional transplanter is the structure which transmits the driving force from an engine to the planting tool side via a planting clutch.

  The above-described inter-plant adjustment mechanism of the transplanter has the following configuration.

That is, the pin provided on the inter-plant transmission output shaft abuts the planting transmission restriction arm to rotate the planting transmission regulation arm, and the planting transmission regulation groove formed on the outer periphery of the planting clutch and The arrangement is released, the planting clutch shaft is driven, and the planting tool is moved up and down.

Further, when the outer periphery of the planting clutch makes one rotation, the tip of the planting transmission restricting arm engages with the planting transmission restricting groove of the outer periphery again to stop the driving of the planting clutch shaft. It is configured to stop the vertical movement of the tool.

In addition, by selecting one of the multiple types of inter-gear shift output gears that rotate integrally with the inter-gear transmission output shaft, the transmission ratio from the inter-gear transmission input shaft is changed to change the rotation speed of the inter-gear transmission output shaft. It is the structure to do.

  In a conventional transplanter, the strain can be adjusted by the above configuration.

JP-A-11-227593

However, in the inter-plant adjustment mechanism of the conventional seedling transplanting machine described above, the transmission ratio from the inter-shaft transmission input shaft is selected by selecting any one of a plurality of inter-shaft transmission output gears provided on the inter-shaft transmission output shaft. Since it is the structure which changes and changes the rotational speed of the inter-strain transmission output shaft, there existed a subject that a structure became complicated.

An object of the present invention is to provide a transplanter capable of adjusting strains with a simpler configuration than the conventional one in consideration of the problems of the conventional transplanter.

The first aspect of the present invention is a planting tool (11) for planting an implant (22), and the planting tool (11).
In the transplanting machine provided with the planting drive mechanism (400) that intermittently operates the planting vehicle body (15), the planting drive mechanism (400) transplants the transmission to the planting tool (11). Of the planting clutch (420) based on the shape of the clutch (420), the rotatable cam member (441) provided on the transmission downstream side of the planting clutch (420), and the cam member (441). A regulating member (460) for turning transmission off, and a driving device (1400) for moving the regulating member (460) to put the planting clutch (420) in the on state. 1400) includes a biasing member (1420) that biases the regulating member (460) in a direction in which the planting clutch (420) is engaged, and the regulating member (460) is the planting clutch (420). To turn on Actuator switches the stopper (1430) which restricts movement, the restriction on working state and a non-activated condition by said stopper (1430) in (
1440) and actuating the actuator (1440) to stop the stopper (1430).
) Is switched from the operating state to the non-operating state, the restriction of movement of the restricting member (460) in the direction to bring the planting clutch (420) into the engaged state is released, and the planting clutch (420) The transplanter is configured to shift from the off state to the on state.

The second aspect of the present invention is the transplanter according to claim 1, further comprising a back plate (1460) for restricting movement of the stopper (1430) at a predetermined position and guiding the stopper in the moving direction.

The third aspect of the present invention is the actuator (1440) and the stopper (1430).
During the operation, regardless of the operation of the actuator (1440), the stopper (1430)
The transplanter according to claim 1 or 2, further comprising an accommodation mechanism (1450) that enables manual switching from an operation state to a non-operation state.

The fourth aspect of the present invention is provided with a planting hopper (2011) for planting the transplant (22), and the planting hopper (2011) is a cylindrical member having a sharp tip, and the tip is moved up and down. The scraper (1510) for scraping the outer surface and the inner surface of the planting hopper (2011) is provided in front of or behind the planting hopper (2011), and the scraper (1510) is disposed on the lower end side. 1510) and a fulcrum shaft (15) whose upper end side is located above the planting hopper (2011) in a side view.
22) is provided with a scraper arm (1520) that is pivotably connected back and forth, and the scraper (1510) rotates together with the planting hopper (2011) that rises while opening the tip, and the scraper arm (1520) rotates. Then, it moves to the front side or the rear side and scrapes the outer surface of the planting hopper (2011), and then enters the inside of the planting hopper (2011) to scrape the inner surface of the planting hopper (2011). The transplanter according to any one of claims 1 to 3.

The fifth aspect of the present invention is a tray supply device (100) for supplying a tray (20) having a plurality of seedling pots (21) containing the transplant (22), and the transplanting from the seedling pot (21). A take-out device (200) for taking out an object and supplying it to a planting hopper (11, 2011) for planting the transplant is provided, and the take-out device (200) enters the floor of the seedling pot (21). An extractor (260) for taking out and holding the implant, and an extractor (26)
0) and an extruding tool (281) for extruding the implant held by the transplanting hopper (11, 2011) and taking out the implant. Then, the pusher (281) moves a predetermined distance in the direction of pushing out the implant, and the pusher (
When the implant 281) supplies the implant to the planting hopper (11, 2011), the pusher (281) further moves in the direction of pushing out the implant to release the implant.
To 4. The transplanter according to any one of 4 to 4.

Further, the sixth aspect of the present invention relates to a drive wheel (510), a wheel (5
31, 532) and a pair of left and right crawler travel devices (350 having crawler (540))
0) and the shaft core (62) of the driving wheel (510) or the shaft core (61) of the input shaft (61) for driving the driving wheel (510). (531, 532
) And a support member (560, 570, 590) that can be pivoted up and down, and the support member (560, 570, 590) is disposed so as to be pivotable about the shaft core (61, 62). The first member (560) and the rollers (531, 532) arranged in the front-rear direction are integrally supported, and the first member (560) can be rotated by a swing fulcrum (571). A second member (570) connected to the first member (560) at one end and a tension spring (590) connected to the second member (570) at the other end; Member (560
570, 590) about the axis (61, 62) as a center, and the tension spring (590) is pivoted in the middle of the lift-up direction (571).
6) The transplanter according to any one of claims 1 to 5, wherein the dead center is exceeded.

According to the first aspect of the present invention, the cam member (44 provided on the transmission downstream side of the planting clutch (420).
1) the planting clutch (420) can be disengaged and the drive device (1
400) is actuated to move the regulating member (460) and the planting clutch (420) can be engaged, so that the configuration of the planting drive mechanism (400) can be simplified.

Moreover, since the on / off of the planting clutch (420) can be switched by operating the actuator (1440) and switching the stopper (1430) to the active state or the non-active state, the drive device (1400) can be downsized. Thus, weight reduction and cost reduction are achieved.

Further, according to the second aspect of the present invention, in addition to the effects of the first aspect of the invention, the back plate (1460) for restricting the movement of the stopper (1430) at a predetermined position and guiding it in the moving direction is provided. 1430) accurately moves between the operating position and the non-operating position, so that the planting clutch (420) is appropriately turned on and off and the stopper (1430) can be moved smoothly.

Further, according to the third aspect of the present invention, in addition to the effects of the first or second aspect, the planting clutch (420) can be engaged at an arbitrary timing, so that the planting position can be manually adjusted. In addition, maintainability is improved.

According to the fourth aspect of the present invention, in addition to the effects of any one of the first to third aspects, the common scraper (1510) can scrape the inner and outer surfaces of the planting hopper (2011).

Further, according to the fifth aspect of the present invention, in addition to the effects of any one of the first to fourth aspects, the pusher (281) can be brought into contact with the floor of the implant (22). 260) and the pushing tool (281) can stably hold the implant (22), and the planting accuracy can be improved.

Further, according to the sixth aspect of the present invention, in addition to the effects of any one of the first to fifth aspects of the invention, the tension spring is changed according to the vertical movement position of the front and rear wheels (531, 532) with respect to the drive wheel (510). (590) can be properly exceeded.

Left side view of seedling transplanter of Embodiment 1 of the present invention Plan view of seedling transplanter of Embodiment 1 (A): A schematic cross-sectional view of the center of the planting tool according to the first embodiment cut along a plane parallel to the longitudinal direction of the aircraft and perpendicular to the ground, and viewed from the left side, (b): Planting Schematic sectional view of the center part of the tool cut from a plane parallel to the left-right direction of the machine body and perpendicular to the ground and viewed from the back side, (c): Arranged along the rear surface inside the planting tool Perspective view of rear guard viewed from left rear In the first embodiment, the operation of the extraction member, the operation of the planting tool, and the operation timing of the lateral feed operation of the seedling table of the tray supply device are shown, and the operation of the extraction member, the operation of the planting tool, and the tray supply The figure which shows the operation timing of the vertical feed operation | movement of the tray feed rod of an apparatus (A)-(b): The perspective view of the tray supply apparatus of this Embodiment 1. FIG. Schematic side view showing the configuration of the tray vertical feeding device of the first embodiment (A): Schematic perspective view of the take-out device of the first embodiment, (b): Modification of the extrusion rod shown in FIG. 7 (a) Schematic side view of the take-out device when viewing the lower right front side from the upper left back side of the paper surface of FIG. The schematic diagram which shows the rough correspondence of the position of rotation of the seedling drive arm and the position on the locus | trajectory of the front-end | tip part of a pair of extraction claw in the extraction apparatus of this Embodiment 1. FIG. Left side view of seedling planting device and seedling planting device drive mechanism of Embodiment 1 Schematic left side view of the seedling planting device drive mechanism of the first embodiment (A): Plan view of a driving device and a stopper arm which are a part of the seedling planting device driving mechanism of the first embodiment, (b): Rear view of the driving device and the stopper arm shown in FIG. , (C): Right side view of the driving device and the stopper arm shown in FIG. The top view explaining the various operation levers arrange | positioned in the vicinity of a pair of left and right handle grips of the steering handle of the first embodiment, and the operation unit The left view which shows schematic structure of the planting depth adjustment mechanism of this Embodiment 1. Schematic configuration diagram explaining input and output to the control unit of the first embodiment The schematic side view explaining the scraper apparatus in the seedling transplanting machine of Embodiment 2 of this invention Schematic plan view for explaining the scraper device according to the second embodiment. Schematic side view for explaining the operation of the scraper device in the second embodiment Schematic side view showing the left crawler traveling device, the left traveling transmission case, and the left driven front wheel in the planting work posture of the seedling transplanter according to Embodiment 3 of the present invention. Schematic perspective view of a connecting portion when the left second crawler traveling device is configured to be slidable in the left-right direction with respect to the left second traveling transmission case in the third embodiment. Schematic left side view of the third crawler traveling device of the third embodiment Schematic left side view showing the state of the third crawler traveling device when the seedling transplanter equipped with the third crawler traveling device of FIG. 21 is lifted up to the maximum height Schematic left side view showing the configuration of the fourth crawler traveling device (A): Schematic left side view showing the configuration of the fifth crawler traveling device, (b): explanatory diagram for explaining the formula (A): Perspective view of an improved roller wheel applicable to the crawler traveling device described in the embodiment, (b): Schematic side view showing a state where the improved wheel is mounted on the crawler traveling device. Left side view showing schematic configuration of second seedling planting device

  Hereinafter, a seedling transplanter according to an embodiment of the transplanter of the present invention will be described.

(Embodiment 1)
In Embodiment 1, a seedling transplanter according to an embodiment of the transplanter of the present invention will be described with reference to the drawings.

  FIG. 1 shows a schematic left side view of the seedling transplanter 1 of the present embodiment, and FIG. 2 shows a schematic plan view.

  As shown in FIGS. 1 and 2, a seedling transplanter 1 for transplanting seedlings such as vegetables has a traveling vehicle body 15 including a pair of left and right front wheels 2 and rear wheels 3 as traveling wheels, and a front portion of the traveling vehicle body 15. Seedling planting that swings the planting tool 11 up and down so as to plant the seedling 22 (see FIG. 5), which is arranged behind the traveling vehicle body 15 and the engine 12 and the transmission case (also referred to as main transmission case) 4 arranged in the field. An attaching device 300, a tray supply device 100 for supplying the tray 20 (see FIG. 5) containing the seedlings 22, and a take-out member 260 inside the seedling pot 21 (see FIG. 5) of the tray 20 of the tray supply device 100. The planting depth adjusting mechanism 700 (see FIG. 14) includes a take-out device 200 that takes out the seedlings 22 and supplies them to the planting tool 11 and a sensor plate 710 for keeping the planting depth of the seedlings 22 constant. ) And pressure wheel 3, is configured to include a steering wheel 8, and arranged in the center of the steering wheel 8 operating section 600 or the like.

  In addition, the detailed structure of the extraction apparatus 200 which is one of the characteristics of the seedling transplanter 1 of this Embodiment is later mentioned using FIGS.

  Further, in the seedling transplanter 1 of the present embodiment, as shown in FIGS. 1 and 2, the rotational power output from the engine 12 is branched by the mission case 4 and left and right via a pair of left and right traveling transmission cases 60. It is configured to be transmitted to the pair of rear wheels 3 and also to the planting transmission device 18 provided on the rear side of the mission case 4.

  That is, in the seedling transplanter 1 of the present embodiment, the power from the mission case 4 is transmitted to the planting transmission device 18 to take out the seedling 22 from the seedling pot 21 and plant it in the groin of the field, and the chain belt. While being transmitted to the take-out device 200 through 202, it is transmitted to the planting tool 11 through the seedling planting device drive mechanism 400 attached to the planting transmission device 18 and the seedling planting device 300.

  In addition, the planting operation of the seedling transplanter 1 of the present embodiment is configured to be intermittently performed by the seedling planting device drive mechanism 400.

  The detailed configurations of the seedling planting device drive mechanism 400 and the seedling planting device 300, which are one of the characteristics of the seedling transplanter 1 of the present embodiment, will be described later with reference to FIGS.

  In addition, as shown in FIG. 2, the tray supply device 100 is provided with a tray detection device 1100 for detecting that the tray 20 is not placed on the tray conveyance path 111.

  In the feeding operation of the tray supply device 100 of the seedling transplanter 1 according to the present embodiment, (1) the seedling stand 110 is arranged so that the seedlings in the seedling pot 21 for one row in the horizontal direction of the tray 20 are sequentially taken out by the takeout member 260. However, after the horizontal feeding operation intermittently sent in the horizontal direction and (2) the removal of the seedlings from all the seedling pots 21 for one row in the horizontal direction is completed, the tray 20 on the seedling table 110 is moved to the tray feeding rod. There is a vertical feed operation in which the row of the seedling pots 21 is fed downward by 121 in a downward direction.

  The vertical feed by the tray feed rod 121 is in a state where the tip of the tray feed rod 121 is engaged with the groove between the adjacent seedling pots 21 on the back side of the tray 20, and in this state, the tray feed rod 121 is substantially in a side view. The tray 20 is rotated by drawing a square locus A (see FIG. 6), and the tray 20 is intermittently vertically fed along the tray conveyance path 111.

  Detailed configurations of the tray supply device 100 and the tray detection device 1100 will be described later with reference to FIGS.

  Further, as shown in FIGS. 1 and 2, the seedling transplanter 1 of the first embodiment has a main portion extending to the right side at the rear part of the left and right frames 16 arranged in the left and right direction at the rear end of the mission case 4. A frame 17 is provided. A steering handle 8 extending rearward from the left and right ends is provided at the rear end of the main frame 17, and the steering handle 8 is supported by the transmission case 4 via the main frame 17 and the left and right frames 16. Yes.

  Thus, the operator can perform a steering operation of the traveling vehicle body 15 with the steering handle 8 while walking behind the traveling vehicle body 15.

  That is, the seedling transplanter 1 according to the present embodiment is accommodated in the tray 20 while the traveling vehicle body 15 is advanced with the pair of left and right front wheels 2 and 2 and the pair of left and right rear wheels 3 and 3 straddling the heel U. It is the structure which can be planted automatically on the upper surface of the ridge U.

  The traveling unit is provided with a body control mechanism 50 that controls the posture and the vehicle height of the traveling vehicle body 15 by moving the pair of left and right rear wheels 3 and 3 up and down relative to the traveling vehicle body 15.

  The airframe control mechanism 50 includes a hydraulic lift cylinder 10 that lifts and lowers the traveling vehicle body 15 by raising and lowering the rear wheel 3 between the traveling transmission case 60 of the pair of left and right rear wheels 3 and the traveling vehicle body 15, and the traveling vehicle body 15. A horizontal hydraulic cylinder 14 to be tilted is provided. When the hydraulic lifting cylinder 10 is extended and contracted, the pair of left and right rear wheels 3 move up and down relative to the traveling vehicle body 15 in the same direction by the same amount. Goes up and down.

  That is, in the seedling transplanter 1 of the present embodiment, as shown in FIGS. 1 and 2, the mission output shaft 4 a for outputting driving force to the pair of left and right rear wheels 3 faces the left and right outer sides of the mission case 4. Projecting. Further, the input shaft 61 of the traveling transmission case 60 is connected to the mission output shaft 4a by spline coupling. Further, swing arms 63a extending in a direction orthogonal to the input shaft 61 are respectively fixed to the upper surface side of the outer periphery of the left and right rotating outer cylinder portions 63 protruding from the traveling transmission case 60 to the mission case 4 side (see FIG. 1, see FIG. The traveling transmission case 60 is connected to the transmission case 4 so as to be rotatable about the input shaft 61 via the left and right rotating outer cylinders 63.

  The rod connecting plate 9 is attached to the tip of the piston rod of the hydraulic lifting cylinder 10, and the left and right ends of the rod connecting plate 9 and the left and right swing arms 63a are connected via the connecting rod 9a. ing.

  A horizontal hydraulic cylinder 14 is incorporated between the left connecting rod 9a and the swing arm 63a.

  The hydraulic lift cylinder 10 is fixedly provided to a hydraulic pressure switching valve portion 40 (see FIG. 1) attached to the upper part of the mission case 4 and switches hydraulic pressure to switch the hydraulic pressure from the hydraulic pump attached to the mission case 4. This is a configuration that operates by operating a lifting operation valve (not shown) provided in the valve unit 40.

  Note that a lift operation lever 81 (see FIG. 13), which will be described later, is connected to the lift operation valve via a cable 82, and a counter arm 760 (see FIG. 14), which will be described later, is connected via a rod 765. .

  Further, a pendulum-type left / right tilt sensor 41 is provided on the right side of the mission case 4, and is detected by the left / right tilt sensor 41 through a horizontal operation valve (not shown) provided in the hydraulic pressure switching valve unit 40. The hydraulic cylinder 14 is actuated, and only the left rear wheel 3 is moved up and down to keep the traveling vehicle body 15 horizontal regardless of the unevenness of the troughs of the eaves U.

  Here, the planting tool 11 is demonstrated using Fig.3 (a)-FIG.3 (c).

  3A is a schematic cross-sectional view of the center portion of the planting tool 11 cut from a plane parallel to the longitudinal direction of the machine body and perpendicular to the ground, and viewed from the left side, FIG. FIG. 3 is a schematic cross-sectional view of the center of the planting tool 11 cut from a plane parallel to the left-right direction of the body and perpendicular to the ground, and viewed from the back side. FIG. It is the perspective view which looked at the rear guard 1210B arrange | positioned along the inner rear surface from the left rear.

  As shown in FIGS. 3 (a) and 3 (b), the planting tool 11 includes a pair of left and right left hopper portions 1011L and 1011R, and a left hopper portion 1011L, which temporarily hold seedlings and plant them in a field. The left hopper holder 1012L and the right hopper holder 1012R, which hold the upper end portion of the right hopper portion 1011R and can be separated from each other so as to open and close the front end sides of the left hopper portion 1011L and the right hopper portion 1011R; 1012L and the right hopper holder 1012R are fixed to the holder holding frame 1013 that can pivot about the fulcrum shaft 1013a, and the lower left side of the left hopper holder 1012L and the right hopper holder 1012R. Part 1011L and right hopper part 10 The left and right sides of the hopper tension spring 1014 that constantly urges the compression force in the closing direction of the 1R, and the left and right hopper holders 1012L and 1012R are fixed to the front upper ends of the left and right hopper holders 1012R. A pair of opening / closing arms 1015L and 1015R is provided.

  Here, the connecting portion 1012La of the left hopper holder 1012L and the connecting portion 1012Ra of the right hopper holder 1012R have a gear shape, and the gear shape is shifted by half a tooth at the front and rear, and the gears are assembled by facing the left and right sides. Is configured to mesh. Specifically, when the right opening / closing arm 1015R fixed to the right hopper holder 1012R and connected to the other end 352 of the opening / closing connection cable 350 is pulled by the opening / closing connection cable 350, the right hopper holder 1012R. The connecting portion 1012Ra rotates about the fulcrum shaft 1013a in the direction in which the right hopper portion 1011R opens. At the same time, when the gear meshes with the connecting portion 1012Ra of the right hopper holder 1012R, the connecting portion 1012La of the left hopper holder 1012L rotates in conjunction with each other, so that the left hopper portion 1011L rotates simultaneously.

  Further, the pair of left and right hopper portions 1011L and 1011R have a substantially cylindrical shape in which the lower end portion is pointed like a bowl in the closed state and the upper end portion is opened.

  The front and rear end surfaces where the left hopper portion 1011L and the right hopper portion 1011R face each other have a substantially V-shaped front V-shaped notch portion 1200F in front view and a substantially V-shape in rear view. A rear V-shaped notch 1200B is provided.

  By providing the front V-shaped notch portion 1200F and the rear V-shaped notch portion 1200B, when the planting tool 11 is closed, the contact portion between the mating surfaces of the left hopper portion 1011L and the right hopper portion 1011R becomes small. Noise generated by hitting the mating surfaces can be reduced.

  In addition, the planting tool 11 of the present embodiment includes a front guard 1210F that covers the front V-shaped notch 1200F from the inside and a rear guard 1210B that covers the rear V-shaped notch 1200B from the inside.

  The front guard 1210F has an upper end portion 1210Fa fixed to the front rising portion 1013F of the holder holding frame 1013, and extends obliquely downward toward the inner center of the planting tool 11 from a side view thereof (see FIG. 3A). The flat plate portion is configured to substantially cover the front V-shaped notch portion 1200F in rear view (see FIG. 3B).

Further, the rear guard 1210B has a left upper end 1210BL and a right upper end 1210B on the rear end side of the left frame portion 1013L and the rear end side of the right frame portion 1013R of the holder holding frame 1013.
R is fixed, and in side view (see FIG. 3 (a)), the flat plate portion extending obliquely downward toward the inner center of the planting tool 11 forms the rear V-shaped notch portion 1200B and the front guard 1210F. Similarly, it is generally configured to cover.

  Further, the upper edge 1210BU of the flat plate portion of the rear guard 1210B (see FIG. 3C) is fixed to the holder holding frame 1013, and the rear upper edge 1011BU of the pair of left and right hoppers (FIG. 3 ( It is configured so as to be the same height as the reference a). That is, the upper end edge portion 1210BU of the rear guard 1210B is configured to be lower than the heights of the left and right upper end portions 1210BL and 1210BR of the rear guard 1210B in the rear view.

  The front guard 1210F and the rear guard 1210B are elastic or resin plate members.

  By providing the front guard 1210F and the rear guard 1210B, when the take-out device 200 supplies the seedling 22 to the planting tool 11, the seedling 22 is planted from the front V-shaped notch 1200F or the rear V-shaped notch 1200B. It is possible to prevent the seedling 22 from being dropped out of the attachment 11 or caught in the front V-shaped notch 1200F or the rear V-shaped notch 1200B, and the transplanting accuracy of the seedling is improved.

In addition, the upper edge portion 1210BU of the rear guard 1210B has the same height as the rear upper edge portion 1011BU (see FIG. 3A) of the pair of left and right hopper portions or lower than the upper edge portion. The height of 1210BU is the rear left and right upper ends 1210B of the rear guard 1210B in the rear view.
L, when configured to be lower than the height of 1210BR, when the take-out device 200 supplies the seedling 22 to the planting tool 11, a part of the seedling 22 is the upper edge 1210B of the rear guard 1210B.
Contact with U can be prevented, and the seedling 22 can be accurately fed into the hopper without damaging the seedling 22.

  Next, the operation timing of the extraction member 260, the planting tool 11, the tray supply device 100, and the tray feed rod 121 described above will be described mainly with reference to FIG.

  FIG. 4 shows the operation timing of the extraction member 260, the operation of the planting tool 11, and the operation timing of the transverse feed operation of the seedling table 110 of the tray supply device 100, and the operation of the extraction member 260, the operation of the planting tool 11, FIG. 5 is a diagram illustrating the operation timing of the vertical feed operation of the tray feed rod 121 of the tray supply device 100.

  The vertical feed operation is an operation that is executed when the seedling placing stand 110 moves to the extreme left and right end and the seedling 22 of the last seedling pot 21 is extracted.

  The horizontal axis in FIG. 4 is based on the rotation angle of various drive arms from the horizontal direction. For example, in the case of the take-out member 260, the rotation angle of the drive arm 220 (see FIG. 7), the rotation angle of the vertical movement arm 320 (see FIG. 10) in the case of the planting tool 11, the vertical angle by the tray supply device 100. In the case of feeding, the rotation angle of the longitudinal feed drive arm 150 (see FIG. 6) is used as a reference.

  As shown in FIG. 4, according to the operation timing 2210 of the extraction claw, the seedling transplanter 1 of the present embodiment is pulled out while the extraction member 260 holds the seedling 22 from the inside of the breeding pot 21 at the timing P2. Release of the seedling 22 to the planting tool 11 is started before the timing P3, the release of the seedling 22 is terminated at the timing P3, and then the inside of the adjacent seedling pot 21 is entered at the timing P4. After grasping the seedling 22, it is configured to come out of the inside of the seedling pot 21 (see timing P2 in FIG. 4).

  Moreover, as shown in FIG. 4, according to the operation timing 2220 of the planting tool, the seedling transplanter 1 of the present embodiment stops the descending operation of the planting tool 11 at the timing P3 slightly lowered from the top dead center. After that, it is configured to reach the bottom dead center at timing P4.

  Here, at the timing P3 when the planting tool 11 stops the descending operation, the operation of the take-out member 260, the lateral feed operation of the tray supply device 100 (ie, the operation of the seedling table 110) and the vertical feed operation (ie, the tray feed rod). The operation related to the planting operation including the operation 121) is stopped at the same time, so that the planting operation can be performed intermittently and adjustment between the planting stocks is possible. In addition, the stop period of these operation | movements is comprised by the operation part 600 (refer FIG. 13) from 0 second to a predetermined period according to the desired planting stock.

  The configuration for intermittently realizing the planting operation is realized by the planting clutch 420, the intermittent cam 441, the solenoid 1440, and the like in the seedling planting device drive mechanism 400, which will be described later with reference to FIG. To do.

  In addition, as shown in FIG. 4, according to the operation timing 2230 of the lateral feed operation in the seedling table 110 of the tray supply device 100, the seedling transplanter 1 of this embodiment has the takeout member 260 rushing into the seedling pot 21. During the operation, that is, from timing P4 to P2, the horizontal feeding operation for one seedling pot 21 is stopped, and at the timing P3 when the planting operation of the planting tool 11 is stopped, the seedling is raised. In the middle of the horizontal feeding operation for one pot 21, the horizontal feeding operation is also stopped at the same time.

  Further, as shown in FIG. 4, according to the operation timing 2240 of the vertical feed operation in the tray feed rod 121 of the tray supply device 100, the seedling transplanter 1 of the present embodiment is configured so that the tray feed rod 121 is seen from the side. The tip of the tray feed rod 121 is pulled out from the gap 21a (see FIG. 6) between the adjacent seedling pots 21 on the back side of the tray 20 in the rotation operation while drawing a substantially rectangular locus A (see FIG. 6). (See arrow 121a1 in FIG. 6), move upward (see arrow 121a2 in FIG. 6), and again enter the gap 21b (see FIG. 6) between the next seedling pots 21 (see arrow 121a3 in FIG. 6). The return operation up to is started after the takeout member 260 enters the inside of the seedling pot 21 and the takeout member 260 comes out of the inside of the seedling pot 21 (timing in FIG. 4). 2 reference) was just completed, starts the longitudinal feed operation at timing P2, is completed constitutes the longitudinal feed operation at timing P3.

  In FIG. 4, for the purpose of facilitating understanding, the tray feed rod 121 is moved into the seedling pot by the operation timing 2250 with the same content as the operation timing 2240 of the vertical feed operation in the tray feed rod 121 of the tray supply device 100 described above. It is shown from the viewpoint of whether it is in the groove part between 21 or has come out.

  With the above configuration, during the return operation of the tray feed rod 121 (see timings P1 to P2 in FIG. 4), since the takeout member 260 has rushed into the seedling pot 21, the tray 20 is pressed by the takeout member 260. Therefore, the tray 20 can be prevented from shifting downward on the tray conveyance path 111.

  In addition, with the above configuration, when the planting operation of the planting tool 11 is stopped by intermittent planting, the vertical feed operation of the tray 20 by the tray feed rod 121 is completed (see timing P3 in FIG. 4). The tray feed rod 121 can reliably hold the tray 20 in a stopped state in intermittent planting, and the tray 20 can be prevented from shifting downward on the tray conveyance path 111.

  That is, in the intermittent planting stop state, as described above, the members related to the planting operation stop simultaneously, so that the tray 20 is likely to be displaced due to vibration or the like due to traveling of the airframe, but in this embodiment, the tray 20 The vertical feed operation of the tray 20 by the feed rod 121 has been completed, and the tray feed rod 121 is stopped while remaining in the gap 21a (see FIG. 6) between the adjacent seedling pots 21, The tray feed rod 121 can reliably hold the tray 20.

  In addition, with the above configuration, while the take-out member 260 enters the inside of the seedling pot 21, the tray transport path moving device 170 does not perform the lateral feeding operation of the seedling table 110 of the tray supply device 100, and is intermittent. When the planting operation of the planting tool 11 is stopped by the planting operation (see timing P3 in FIG. 4), one seedling pot 21 of the seedling table 110 of the tray supply device 100 by the tray transport path moving device 170 is used. Since it is in the middle of the horizontal feed operation, the horizontal feed for one seedling pot 21 of the tray 20 can be operated slowly and with sufficient margin at a timing that does not hinder the seedling extraction operation, and the accuracy of the horizontal feed can be improved. improves.

  Further, in the present embodiment, while the tray feed rod 121 is performing the return operation, the tray transport path moving device 170 does not perform the lateral feed operation of the seedling table 110 of the tray supply device 100. This is because, while the tray feed rod 121 is returning to move the next horizontal row of seedling pots 21 downward, the horizontal feed operation (in this case, the seedling table 110 moves to the extreme end). Therefore, if the holding of the tray 20 is not stable while the tray feeding rod 121 is returning, the lateral feeding operation will be performed. This is because the tray 20 may be displaced by the lateral feed operation of the tray supply device 100 by the tray transport path moving device 170. Thereby, in this Embodiment, it can prevent that the tray 20 slip | deviates by the horizontal feed operation | movement of the tray supply apparatus 100 by the tray conveyance path moving apparatus 170. FIG.

  Moreover, according to the seedling transplanting machine 1 of the present embodiment, the tray 20 can be realized with a stable vertical feed that is not easily displaced, and a tray supply device 100 including a vertical feed mechanism different from the conventional one can be provided. The degree of freedom of design increases.

  Next, the tray supply apparatus 100 described above will be further described mainly with reference to FIGS. 5 (a), 5 (b), and 6. FIG.

FIG. 5A is a perspective view of the tray supply device 100, and FIG. 5B is a cross-sectional view of FIG.
It is an expansion perspective view of a part. FIG. 6 is a schematic side view illustrating the configuration of the tray vertical feeding device 120 of the tray supply device 100.

  The tray 20 is formed by connecting a plurality of seedling pots 21 vertically and horizontally, is formed of plastic, and is configured to retain flexibility. Each seedling pot 21 is connected on the front surface side, and the back surface is in an independent form.

  The tray supply device 100 includes a seedling table 110 having a tray conveyance path 111 inclined downward to support the bottom of the tray 20, and a tray vertical feeding device that intermittently feeds the tray 20 in the vertical direction along the tray conveyance path 111. 120 and a tray transport path moving device 170 (see FIG. 2) for moving the seedling table 110 having the tray transport path 111 in the left-right direction.

  In addition, as described above, the tray supply device 100 is provided with the tray detection device 1100 for detecting that the tray 20 is not placed on the tray conveyance path 111.

  Here, the configuration and operation of the tray detection apparatus 1100, which is one of the characteristics of the seedling transplanter 1 of the present embodiment, will be described with reference to FIGS.

  That is, as shown in FIGS. 2 and 5, the tray detection device 1100 is provided on a tray detection member 1110 that is pivotally disposed in a substantially central portion of the tray conveyance path 111 and on the left and right outer surfaces of the seedling table 110, respectively. A pair of left and right interlocking arms 1120L and 1120R that are arranged and rotate in conjunction with the rotation of the tray detection member 1110, a connecting shaft 1130 that connects the tray detection member 1110 and the pair of left and right interlocking arms 1120L and 1120R, and a tray A pair of left and right limiter switches 1140L and 1140R are provided on the inner surfaces of the left and right side portions 172L and 172R of the transport path moving device 170, respectively, at positions corresponding to the pair of left and right interlocking arms 1120L and 1120R. Signal lines (not shown) of the pair of left and right limiter switches 1140L and 114R are connected to the control unit 800 (see FIG. 15).

  When the tray 20 is not supplied on the tray conveyance path 111 or when the rear end portion of the tray 20 passes the position of the tray detection member 1110, the tray detection member 1110 is a spring member (not shown). Is omitted toward the front side from the substantially central portion of the tray conveyance path 111, but when the tray 20 is supplied onto the tray conveyance path 111, the back surface of the tray 20 is attached to the spring member. Since the tray detection member 1110 is pressed by a force that opposes the restoring force, the tray detection member 1110 rotates counterclockwise when viewed from the left side.

  As a result, the tray detection member 1110 rotates clockwise or counterclockwise in accordance with the presence or absence of the tray 20, and the pair of left and right interlocking arms 1120L and 1120R rotate in conjunction therewith.

  In a state where the tray 20 does not exist in the central portion on the tray conveyance path 111, the tray detection member 1110 rotates clockwise as viewed from the left side and faces from the opening at the substantially central portion of the tray conveyance path 111 to the front side. At the same time, the pair of left and right interlocking arms 1120L and 1120R rotate clockwise in conjunction with this and stop at a predetermined position. When the seedling table 110 is laterally fed and reaches the inner surface of either of the left and right side portions 172L and 172R of the tray transport path moving device 170, the pair of left and right interlocking arms 1120L or 1120R is moved to the pair of left and right limiter switches 1140L. Alternatively, a signal indicating that the tray 20 does not exist at a substantially central portion on the tray conveyance path 111 is sent to the control unit 800 when it hits the movable portion 1141L or 1141R of 1140R. Receiving the signal, the control unit 800 sounds an alarm buzzer (not shown) arranged in the operation unit 600 (see FIG. 13).

  The alarm buzzer is configured to sound for a certain time (several seconds) after the movable part 1141L or 1141R of the pair of left and right limiter switches 1140L or 1140R is pressed, and then the alarm sound of the alarm buzzer automatically stops.

  In addition, the certain time is set to be equal to or longer than the time when the seedling table 110 moves from end to end, and each time the movable unit 1141L or 1141R of the pair of left and right limiter switches 1140L or 1140R is pressed, the certain time is counted. Is reset, a signal from the newly pressed limiter switch 1140L or 1140R is received, and the count for a predetermined time is newly started, so that the alarm sound is stopped until the tray 20 is supplied. It can be set as the structure which rings continuously without.

  As described above, the pair of left and right limiter switches 1140L and 1140R are attached to the left and right side portions 172L and 172R of the tray transport path moving device 170, which is a fixed portion that does not move to the left and right. The signal wiring (not shown) extending from can be securely fixed, and disconnection can be prevented.

  Further, since the alarm buzzer automatically stops when a warning sound is generated for a certain time, it is not necessary to provide a stop switch.

  In the above embodiment, the configuration in which the alarm buzzer sounds for a certain period of time has been described. However, the configuration is not limited thereto. For example, when the tray detection device 1100 detects the absence of the tray 20, the horizontal row of the tray 20 is linked with the solenoid 1440. For example, the alarm buzzer may sound 10 times according to the number of the seedling pots 21 arranged in the above.

  In the above embodiment, the configuration in which the alarm buzzer sounds for a certain period of time has been described. However, the present invention is not limited to this. For example, when the tray detection device 1100 detects the absence of the tray 20 twice in succession, it continues for several seconds. The alarm buzzer may sound or the alarm buzzer may sound longer in conjunction with the solenoid 1440 every time the absence of the tray 20 is detected.

  According to the said structure, since the residual amount of a seedling is known by the sound of an alarm buzzer, the tray 20 can be replaced with a margin.

  Moreover, according to the said structure, there exists an effect that it can judge a seedling reduction degree and a seedling residual amount degree by an alarm operating whenever the intermittent planting operation | movement linked with the action | operation of the solenoid 1440 is carried out.

  Here, the description returns to the tray vertical feeding device 120 of the tray supply device 100 again.

  The tray vertical feeding device 120 enters between the seedling pots 21 protruding from the back side of the tray 20 to the back side, and moves downward to feed the tray 20 by one horizontal row of the seedling pot 21, The tray feed rod 121 is configured to move out from between the seedling pots 21 and move upward by the horizontal row of the seedling pots 21. The tray feed rod 121 is configured such that a central portion 121a can enter and exit from a retreat groove 111a provided at a lower portion of the tray conveyance path 111, and both end portions 121b are bent at a right angle so as to be outside of both sides of the tray conveyance path 111. The configuration is such that the tray 20 does not get in the way when the tray 20 moves on the tray conveyance path 111.

  Further, the tray supply device 100 includes a pair of left and right rod guide plates 112 for restricting the movement of the tray feed rod 121 on the end surface portions on both sides of the tray conveyance path 111 on the downstream side of the retreat groove 111a. Yes. At the upper end edge of the rod guide plate 112, a notch 112a is formed into which a protrusion 121ab protruding downstream at both ends of the central portion 121a of the tray feed rod 121 can enter (FIG. 5B). reference).

  That is, the notch portion 112a is temporarily formed between the center portion 121a of the tray feed rod 121 until the center portion 121a of the tray feed rod 121 moves downward and then comes out from between the seedling pots 21. The protrusions 121ab at both ends are held and the tray 20 is prevented from moving downward due to the weight of the seedlings 22 placed in the seedling pot 21. The trajectory of the central portion 121a of the tray feed rod 121 will be described later with reference to FIG.

  Further, the tray transport path moving device 170 is provided on the back side of the tray transport path 111 and obtains a driving force from the main body side of the seedling transplanter 1 to move the seedling table 110 having the tray transport path 111 in the left-right direction. A lead cam shaft 171, a guide rail 155 that is provided above the lead cam shaft 171 and guides the movement of the seedling table 110 having the tray conveyance path 111 in the left-right direction, and both left and right side portions 172 </ b> L that hold the guide rail 155 on both the left and right sides , 172R.

  Further, the tray transport path 111 is supported by a lead cam shaft 171 and a guide rail 155 that guides left and right movement provided on the inner upper side of the tray transport path 111. As a result, the guide rail 155 supports the tray conveyance path 111 at a position away from the lead cam shaft 171, so that there is little backlash when moving in the left-right direction.

  When the tray 20 is inserted from above the seedling mount 110 so as to be sandwiched between the tray conveyance path 111 and the presser frame 25, the tip of the tray feed rod 121 is engaged with the groove on the back side of the tray 20. In this state, the tray feed rod 121 rotates while drawing a substantially square locus A in a side view, whereby the tray 20 is intermittently fed vertically downward along the tray conveyance path 111.

  A mechanism for intermittently feeding the tray 20 intermittently using the tray feed rod 121 will be described later.

  Further, in the present embodiment, the tray 20 is sequentially vertically fed along the tray conveyance path 111 and the seedlings 22 are all taken out by the take-out member 260, and then pass below the tray vertical feed device 120 and finally. In this configuration, it passes through the operation unit 600 and is discharged in the direction of the steering handle 8 (see the discharge path 20t in FIG. 1), and this point will be described.

  That is, as shown in FIGS. 1 and 2, the main clutch lever 900 is disposed at the tip of the discharge path 20t through which the tray 20 is discharged. When the main clutch lever 900 is operated forward, the main clutch is “on”. When the operation is performed rearward (see the arrow 900B in FIG. 1), the main clutch enters the “disengaged” state.

  The tray 20 discharged in the direction of the steering handle 8 is normally removed by an operator. However, even if the operator neglects the removal operation of the tray 20 that has been discharged, in this embodiment, the tray 20 is discharged. When the main clutch lever 900 is pushed backward by the leading end of the tray 20 (see arrow 900B in FIG. 1), the planting operation is automatically stopped for safety. is there.

  By the way, the take-out device 200 is arranged at a position facing the lower end of the seedling table 110, and the tip of the take-out member 260 operates so as to draw a trajectory K, and sequentially from the seedling pot 21 that moves in the lateral direction. The seedling 22 is taken out and supplied to the planting tool 11.

  Next, the configuration of the take-out device 200 provided in the seedling transplanter 1 according to the present embodiment will be mainly described with reference to FIGS.

  Fig.7 (a) is a schematic perspective view of the taking-out apparatus 200, FIG.7 (b) is a modification of the extrusion rod 281 shown to Fig.7 (a). FIG. 8 is a schematic side view of the take-out device 200 as seen from the upper left back side of the paper surface of FIG.

  As shown in FIGS. 7A and 8, the take-out device 200 is rotatably held by an take-out device fixing member 201 fixed to the main body of the seedling transplanter 1, and is attached to the main body side via a chain belt 202. A drive arm 220 that rotates in the same direction by a drive shaft 203 that rotates in the direction of arrow B with the power of the drive source, and a connecting arm in which one end portion 230a is rotatably connected to the distal end side portion 220a of the drive arm 220. 230, a plate-like member held by the take-out device fixing member 201 by fixing pins 201a and 201b, and having an outer shape of a letter J, and the side closer to the tray supply device 100 is straight and the far side is And a guide portion 240 having a guide groove 241 that has a shape that rises in a substantially R shape.

  Further, the take-out device 200 includes a first guided member 245 that is integrated with a cam shaft 271 to be described later and inserted into the guide groove 241 so as to be smoothly slidable without shaking. The substrate 250 is connected to the member 247, protrudes from one end of the side surface to which the guided members are connected, and is bent at a substantially right angle, and the substrate 250 protrudes perpendicularly from the bent portion 251 of the substrate 250. A pair of left and right extraction claw holding pins 252L and 252R, which are movably held, and a root portion are attached to a pair of left and right extraction claw holding pins 252L and 252R, respectively, and the width of the tip portion is narrowed into a tweezers. 21 and a pair of extraction claws 261L, 261R for taking out the seedling 22 in the 21 and a base portion side of the inner surface portion of the pair of extraction claws 261L, 261R facing each other. A take-out member 260 and a spring 263 pulling the opposite ends is mounted, and a.

  Further, the take-out device 200 is a cam 270 having a cam shaft 271 integrated with the first guided member 254, which is pivotably penetrated through the substrate 250, and is related to the thickness of the outer peripheral portion of the cam 270. The outer peripheral portion 272 whose thickness varies depending on the location of the outer peripheral portion when contacting the front end surfaces of the pair of left and right claw tip width regulating projections 262L, 262R provided on the inner surface portions of the pair of extraction claws 261L, 261R. And an outermost edge portion 273 whose outer diameter changes depending on the position of the outermost edge portion with respect to a distance (also referred to as an outer diameter) of the outermost edge portion of the cam 270 from the axis center of the cam shaft 271. The cam 270 is pivotally connected to the substrate 250, and is removed from the seedling pot 21 along the pair of take-out claws 261L and 261R by a change in the outer diameter of the outermost edge 273 of the cam 270. Take-out pawl 261L, it is provided with a pushing mechanism 280 having a push rod 281 for pushing the seedlings 22 held by 261R, a.

  One of the features of the take-out device 200 according to the present embodiment is that after the take-out member 260 takes out the seedling 22 in the seedling pot 21, the push rod 281 moves slightly in the direction of pushing the seedling 22, and then the push rod 281. When the seedling 22 is supplied to the planting tool 11, the push rod 281 is configured to further move in the direction of pushing out the seedling 22. Thereby, since the extrusion rod 281 can be made to contact the floor part of the seedling 22, the seedling 22 can be stably hold | maintained with the extraction member 260 and the extrusion rod 281, and the improvement of planting precision can be aimed at.

  This configuration will be further described later with reference to FIGS.

  The take-out member 260 of the present embodiment is an example of the take-out tool of the present invention, and the push rod 281 of the present embodiment is an example of the push-out tool of the present invention.

  Further, the edge portion 245 a near the tip of the first guided member 245 that is integral with the cam shaft 271 is rotatably connected to the other end 230 b of the connecting arm 230. The first guided member 245 that is integral with the camshaft 271 passes through a transmission mechanism 290 including a first gear 291, a second gear 292, and a third gear 293 by the rotational force of the drive arm 220. The driving force is transmitted to the cam shaft 271 in accordance with the driving cycle of the driving arm 220 by being rotated.

  Further, when the outer peripheral portion 272 of the cam 270 comes into contact with the front end surfaces of the pair of left and right claw tip width regulating protrusions 262L and 262R provided on the inner surface side of the pair of extraction claws 261L and 261R, the outer peripheral portion 272 of the cam 270 The pair of extraction claws 261L and 261R is opened and closed by the interaction between the change in thickness and the restoring force of the tension spring 263.

  Next, the transmission mechanism 290 will be further described.

  That is, the first gear 291 is fixed to the distal end side portion 220a of the drive arm 220, and is rotatably attached to the connection arm 230 via the first rotation shaft 291a. Further, the third gear 293 is fixed to the tip end portion 245 b of the first guided member 245 that is integral with the cam shaft 271, and the edge portion 245 a near the tip end of the first guided member 245 is connected to the connecting arm 230. Therefore, the third gear 293 is rotatably held with respect to the connecting arm 230. Therefore, the third gear 293 rotates integrally with the first guided member 245. The second gear 292 is pivotally attached at the center position of the connecting arm 230, and is sandwiched between both the first gear 291 and the third gear 293, and is engaged with both gears.

  Next, the extrusion mechanism 280 will be further described with reference to FIGS.

  The push-out mechanism 280 pushes out the seedling 22 held by the pair of take-out claws 261L and 261R, and is matched to the width of the front end portion of the take-out claws 261L and 261R on the push-out end surface portion 281S where the front end portion 281a is bent at a right angle. An extrusion rod 281 (see FIG. 7A) in which a notch 281b is formed, and a connecting rod 282 that is bent at a substantially right angle when viewed from the extrusion end surface portion 281S side of the extrusion rod 281, A leading end portion 282a is rotatably inserted into a rear end hole portion 281c provided at the rear end portion of the push rod 281 and is connected to a connecting rod 282 that is held by a detachment preventing pin (not shown) and a connecting rod 282. The other tip portion 282b is fixed to the upper end portion 283a, and the lower end portion 283b is rotatably attached to the substrate 250 by the push arm connecting shaft 283d. The pushing arm 283 provided with the first holding projection 283c, one end hooked to the tension spring holding first projection 283c, and the other end hooked to the tension spring holding second projection 250a fixed to the substrate 250. And an extrusion arm tension spring 284.

  When the cam 270 rotates in the direction of the arrow B, the maximum protrusion 273b having the largest outer diameter portion of the outermost edge portion 273 is the outer peripheral edge portion of the root portion of the first spring spring holding projection 283c. , The push-out arm tension spring 284 is extended, and the push-out arm 283 is swung counterclockwise in FIG. 8 (see arrow C), and the push-out rod 281 connected by the connecting rod 282. Is configured to retreat.

  Further, when the cam 270 is further rotated in the direction of arrow B, the outer diameter of the outermost edge portion 273 is smaller than the largest diameter of the maximum protruding portion 273b, and the outer diameter of the outermost edge portion 273 is the smallest. The contact position 273c1 (see FIG. 8) in the intermediate protrusion 273c having an outer diameter larger than that of the protrusion 273a is configured to contact the outer peripheral edge of the base portion of the first projection 283c for holding the tension spring.

  At this time, the pushing arm tension spring 284 that has been stretched until then slightly contracts, and the pushing arm 283 is swung clockwise in FIG. 8 (see arrow D), and is pushed by the connecting rod 282. The rod 281 protrudes slightly, and the extrusion end surface portion 281 </ b> S is in contact with the seedling 22.

  Further, when the cam 270 further rotates in the direction of the arrow B, the pushing position 273a1 (see FIG. 8) of the smallest protrusion 273a having the smallest outer diameter in the outermost edge 273 becomes the tension spring holding first projection 283c. It is the structure which contacts the outer-periphery edge part of a root part.

  As a result, the push arm tension spring 284 is further contracted, the push arm 283 is swung clockwise in FIG. 8 (see arrow D), and the push rod 281 connected by the connecting rod 282 further protrudes. It is the structure which discharge | releases the seedling 22 completely to the planting tool 11 side.

  Each time the push rod 281 protrudes, the tip of the pair of extraction claws 261L and 261R passes through the notch 281b provided in the tip 281a of the push rod 281. It is a configuration that removes the soil that had been removed.

  Further, as shown in FIG. 7A, the extrusion rod 281 has rising portions 281L and 281R at both left and right ends in the width direction of the central flat portion 281C.

  When the seedlings 22 are taken out from the seedling pot 21 by the rising portions 281L and 281R, the leaves of the seedling 22 can be covered from both sides, so that the seedlings in the adjacent seedling pot 21 can be prevented from being entangled.

  Moreover, since the extrusion rod 281 covers the leaves of the seedling 22 from the lower surface and both side surfaces by the flat portion 281C and the rising portions 281L and 281R at both ends thereof, it can be prevented from being entangled with the pair of extraction claws 261L and 261R.

  In addition, after removing the seedling 22 from the seedling pot 21, the leaves of the seedling 22 are stable up to the position where the seedling 22 is released because the rising portions 281L and 281R are located between the left and right rising portions 281L and 281R. Can be carried.

  Note that the push rod 281 is not limited to the configuration shown in FIG. 7A, and may have the configuration shown in FIG. 7B, for example.

That is, the second push rod 1281 shown in FIG. 7B has second rising parts 1281L, 1281R at the left and right ends in the width direction of the central flat part 281C, as shown in FIG. 7B.
Is formed. The end surface portions 1281La and 1281Ra on the front end side of the second rising portions 1281L and 1281R may be configured to be positioned on the same plane 1280 as the extrusion end surface portion 281S.

  Thus, after the takeout member 260 takes out the seedling 22 in the seedling pot 21, the entire seedling 22 is pushed by the pushing end surface portion 281S and the end surface portions 1281La and 1281Ra on the distal end side of the second rising portions 1281L and 1281R. Since it can take out, the extrusion and discharge | release of the seedling 22 are stabilized.

  Next, the operation of the take-out device 200 in the above configuration will be described with reference to FIGS.

  As described above, the guide portion 240 does not move because it is firmly fixed to the extraction device fixing member 201 fixed to the main body of the seedling transplanter 1.

  As the drive arm 220 rotates, the connecting arm 230 swings. The movement of the connecting arm 230 passes through the guide groove 241 formed in the guide portion 240 and is connected to the substrate 250. Regulated by H.245.

  On the other hand, the substrate 250 also swings along with the movement of the connecting arm 230. In addition to the first guided member 245, the second guided member 247 penetrates the guide groove 241 in the substrate 250. Since the second guided member 247 is not connected to the connecting arm 230, the movement repeats reciprocating movement along the guide groove 241. Since the extraction member 260 is attached to the substrate 250, the extraction member 260 also moves in the same manner as the substrate 250, and the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R are shown in FIGS. Draw a trajectory K.

Here, FIG. 9 shows the rotation position of the drive arm 220 and the pair of extraction claws 261L and 261R.
It is a schematic diagram which shows a rough correspondence with the position on the locus | trajectory K of the front-end | tip parts 261Lp and 261Rp. The rotation positions P1 to P6 of the drive arm 220 shown in FIG. 9 correspond to the positions K1 to K6 on the locus K of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R. In addition, the arrow described on the broken line which shows the locus | trajectory K has shown the operation | movement direction.

  As shown in FIG. 9, the operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R from the position K1 to the position K2 corresponds to the operation of extracting the seedling 22 from the seedling pot 21. Since the locus K from the position K1 to the position K2 is linear, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R recede straight from the seedling pot 21. At this time, the force in the direction approaching each other acts on the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R by the restoring force of the tension spring 263, and the seedlings 22 extracted from the seedling pot 21 are held. I can do it. The opening / closing operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R will be described later together with the operation of the push rod 281.

  The movement of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R from the position K6 toward the position K1 is performed with respect to the seedlings 22 in the breeding pot 21 of the tray 20 at the seedling extraction position. 261L, 261R is inserted, and moves in the opposite direction along the path K from the position K1 to the position K2, so that the tips 261Lp, 261Rp of the pair of extraction claws 261L, 261R It is inserted almost straight into the pot 21. At this time, the force in the direction away from each other acts against the restoring force of the tension spring 263 on the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R, and both the tip portions are open. You can enter the seedling pot 21.

  Thus, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R do not damage the tray 20, the seedling pot 21, and the seedling itself.

  The trajectory K from the position K1 to the position K2 and the trajectory K from the position K6 to the position K1 are substantially linear. The side near the tray supply device 100 of the guide groove 241 is linear. It is because it is done.

  Next, as the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R move from the position K2 to the position K3, the pair of extraction claws 261L and 261R have the tip portions 261Lp and 261Rp facing the breeding seed pot 21 until then. When the posture is suddenly changed substantially downward from the posture and moved to the position K4, the tip portions 261Lp and 261Rp are substantially directed downward.

  In addition, while the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R are directed from the position K3 to the position K4, the contact position 273c1 (see FIG. 8) in the intermediate protrusion 273c is the tension spring holding first projection 283c. Contact the outer peripheral edge of the root. Thereby, the extrusion rod 281 is slightly protruded in front of the extrusion position 273a1, and the extrusion end surface portion 281S contacts the seedling 22.

  The reason why the posture is suddenly changed substantially downward as described above is that the side of the guide groove 241 far from the tray supply device 100 is formed in a shape that rises in a substantially R shape.

  At that time, just below the tip portions 261Lp and 261Rp, the seedling insertion port (not shown) of the planting tool 11 in the ascending process on the locus T1 (see FIG. 1) is directed upward toward the top dead center. The push-out position 273a1 (see FIG. 8) is in contact with the outer peripheral edge of the base part of the tension spring holding first protrusion 283c between the position K4 and the position K5.

  Thereby, the extrusion rod 281 is completely protruded, and the seedling 22 extruded from the distal end portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R by the extrusion end surface portion 281S of the extrusion rod 281 is supplied to the planting tool 11. The The operation of the push rod 281 will be further described later.

  Next, from the position K5 toward the position K6, the tip portions 261Lp and 261Rp of the pair of take-out claws 261L and 261R abruptly move so that the posture that has been directed substantially downward until then can be opposed to the next seedling pot 21. The tip portions 261Lp and 261Rp are inserted into the new seedling pot 21 when the position is changed to move to the position K1.

  As can be seen from the approximate correspondence between the rotation position of the drive arm 220 and the position on the locus K of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R shown in FIG. 9, the position K4 to the position K5 Since the movement toward the position K1 is performed more slowly than the movement toward the position K2 from the position K1 described above, the removal of the seedling 22 from the seedling pot 21 can be performed quickly and the release of the seedling 22 to the planting tool 11 is ensured. Can be done.

  Such an operation is performed because the connecting arm 230 is provided in front of the drive arm 220 (the extraction position of the tray supply device 100). Further, since the drive arm 220 is farther from the extraction position of the tray supply device 100 than the connection arm 230, it does not come into contact with the seedling 22 when the seedling 22 is taken out.

  Next, the operation of the transmission mechanism 290 and the extrusion mechanism 280 will be mainly described with reference to FIGS.

  As shown in FIG. 7, the first gear 291 fixed to the distal end side portion 220 a of the drive arm 220 by the rotation of the drive arm 220 in the B direction moves in the B direction around the rotation fulcrum 220 b of the drive arm 220. Revolve. The first gear 291 is rotatably attached to the connecting arm 230 via the first rotation shaft 291a, and rotates the third gear 293 in the B direction via the second gear 292. The third gear 293 is fixed to the distal end portion 245 b of the first guided member 245 that is integral with the cam shaft 271, and the edge portion 245 a near the distal end of the first guided member 245 is connected to the connecting arm 230. Since the third gear 293 rotates, the cam 270 rotates in the B direction via the cam shaft 271.

  That is, the cam 270 rotates in accordance with the drive cycle of the drive arm 220.

  The cam 270 has an outer peripheral portion 272 whose thickness varies depending on the location, and an outermost edge portion 273 whose distance (outer diameter) from the center of the cam shaft 271 varies depending on the location. As shown, the maximum protrusion 273b in the outermost edge 273 has a larger outer diameter than the minimum protrusion 273a, and the thickness of the first range 272a within the outer periphery 272 that is the same distance from the axial center of the cam shaft 271. Is set thinner than the thickness of the second range 272b which is the remaining thick portion.

  With the above configuration, when the cam 270 rotates in synchronization with the drive cycle of the drive arm 220, the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R move from the position K6 to the position K1. The opening / closing operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R and the operation of the push rod 281 are as follows.

  That is, the second range 272b, which is a thick portion of the outer peripheral portion 272 of the cam 270, comes into contact with the tip surfaces of the pair of left and right claw tip width restricting projections 262L and 262R, whereby a pair of extraction claws 261L and 261R The front end portions 261Lp and 261Rp are opposed to the restoring force of the tension spring 263, and force in directions away from each other is acting, and both the front end portions are open.

  On the other hand, at this time, of the outermost edge portion 273 of the cam 270, the maximum projecting portion 273b is in contact with the outer peripheral edge portion of the base portion of the first projection 283c for holding the tension spring, so that the push-out arm tension spring 284 is The extension arm 283 is extended and rotated counterclockwise in FIG. 8 (see arrow C), and the state where the extrusion rod 281 connected by the connection rod 282 is retracted is maintained.

  Therefore, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R can enter the seedling raising pot 21 and take out the seedling.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K1 toward the position K2, and the extrusion The operation of the rod 281 is as follows.

  That is, at the same time when the operation from the position K1 toward the position K2 is started, the first range 272a, which is a thin portion of the outer peripheral portion 272 of the cam 270, is connected to the tip surfaces of the pair of left and right claw tip width regulating projections 262L and 262R. By making contact, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R move toward each other due to the restoring force of the tension spring 263, so that both tip portions are closed.

  On the other hand, at this time, the maximum projecting portion 273b of the outermost edge portion 273 of the cam 270 is still in contact with the outer peripheral edge portion of the root portion of the first projection 283c for holding the tension spring, whereby the push arm tension spring 284 is pushed. 8 is extended, and the push arm 283 maintains the state of rotating counterclockwise in FIG. 8 (see arrow C), and the push rod 281 connected by the connecting rod 282 maintains the retracted state. ing.

  Therefore, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R can hold the extracted seedling 22 firmly at the tip portion and move to the planting tool 11 side as it is.

  The contact position 273c1 (see FIG. 8) of the intermediate protrusion 273c is the position of the first protrusion 283c for holding the tension spring while the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R are moved from the position K3 to the position K4. As described above, the outer peripheral edge portion of the root portion is brought into contact, whereby the push rod 281 is slightly protruded in front of the push position 273a1, and the push end surface portion 281S is brought into contact with the seedling 22.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K4 toward the position K5, and extrusion The operation of the rod 281 is as follows.

  That is, at the same time when the operation from the position K4 to the position K5 is started, the minimum protrusion 273a of the outermost edge 273 of the cam 270 is replaced by the minimum protrusion 273a outside the root of the first protrusion 283c for holding the tension spring. Contact the periphery.

  As a result, the restoring force of the pushing arm tension spring 284 causes the pushing arm 283 to slightly rotate clockwise when the base portion of the first projection 283c for holding the tension spring moves to the contact position 273c1 in front of the pushing position 273a1. Then, when it comes to the extrusion position 273a1, it immediately turns clockwise (see arrow D in FIG. 8).

  That is, the push rod 281 connected by the connecting rod 282 is slightly protruded when the base portion of the first projection 283c for holding the tension spring comes to the contact position 273c1, and then when the push rod 281 comes to the push position 273a1, At the same time as it is completely projected, the cutout portion 281b of the extrusion end surface portion 281S of the extrusion rod 281 moves while expanding the distal end portions of the pair of extraction claws 261L and 261R.

  Thereby, the extrusion rod 281 is once protruded to such an extent that the extrusion end surface portion 281S comes into contact with the seedling 22 and then the seedling 22 is pushed out at the extrusion position 273a1, so that the root pot is not easily broken and the seedling 22 is planted. The timing of release to the tool 11 is also stabilized.

  At this time, the notch 281b of the distal end 281a of the push rod 281 moves while expanding the distal ends of the pair of extraction claws 261L and 261R, so that dirt or the like attached to the distal ends is removed. Removed at the same time.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K5 to the position K6, and extrusion The operation of the rod 281 is as follows.

  That is, in the outer peripheral portion 272 of the cam 270, the second range 272b which is a thick portion instead of the first range 272a which is a thin portion is in contact with the tip surfaces of the pair of left and right claw tip width regulating projections 262L and 262R. By doing so, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R change to a state in which both tip portions are opened due to the force in the direction away from each other against the restoring force of the tension spring 263. To do.

  On the other hand, when coming to the vicinity of the position K6, the maximum protrusion 273b of the outermost edge 273 of the cam 270 contacts the outer peripheral edge of the root of the first protrusion 283c for holding the spring spring instead of the minimum protrusion 273a. As a result, the pushing arm tension spring 284 is extended, the pushing arm 283 is swung counterclockwise in FIG. 8 (see arrow C), and the pushing rod 281 connected by the connecting rod 282 moves backward. It changes to the state.

  In the above-described embodiment, the case where the pair of extraction claws 261L and 261R are integrally formed of the same metal plate member from the root portion to the distal end portion has been described. About the front end side, it may be made of, for example, a rubber plate or a resin plate that can be detached and has elasticity. Thereby, even if the tip part grasps the seedling 22 by the restoring force of the tension spring 263, the rubber plate is deformed by the elasticity of the tip side, so that the seedling 22 is not crushed.

  Further, the push rod 281 covers the upper ends of the pair of extraction claws 261L and 261R until the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R move in the vicinity of the position K6. Although configured, this can prevent the leaves of the seedling 22 on the tray 20 from being caught by the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R when moving from the position K5 to the position K6.

  In addition, the push rod 281 is configured to be retracted in accordance with the insertion speed when the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R are inserted into the seedling pot 21, thereby the leaves of the seedling 22 Can be prevented from being entangled with the tip portions 261Lp and 261Rp.

  Next, with reference to FIGS. 5 and 6 again, the mechanism for intermittently driving the tray feed rod 121 of the tray supply apparatus 100 will be further described.

  As shown in FIG. 6, the tray vertical feeding device 120 has (1) the above-described tray feeding rod 121 and (2) the upper end portion 121b1 of the both ends 121b of the tray feeding rod 121 fixed, and one of them bent inward. A feed rod arm 130 having a projecting cam 131 having a curved edge portion 131a formed at the lower portion, and (3) a root portion 141 is rotatably supported by the side plate 110a of the seedling table 110, and a feed rod at the tip portion 142. A feed arm 140 that rotatably supports the arm 130 and has a first recess 143a, a second protrusion 143b, and a third recess 143c formed smoothly and continuously in a side view at the lower edge, and (4) a seedling The longitudinal feed pivot shaft 151 that pivots in the direction of arrow E by the driving force obtained from the power source of the transplanter 1 is viewed from the side of the take-out device 200, and is located at two locations, the center position and the right end position of the longitudinal feed pivot shaft 151. Respectively fixed, provided with a longitudinal feeding drive arm 150 having a restraining roller 152 rotatably to the tip portion.

  Further, a feed arm tension spring 160 is attached between the front end portion 142 of the feed arm 140 and the lower portion 110a1 of the side plate 110a of the seedling table 110 so that a downward pulling force is always applied to the feed arm 140. ing. Further, a spring mounting rod 163 that holds the other end of the feed rod arm tension spring 161 having one end attached to the pin 132 attached to the upper end portion of the feed rod arm 130 is fixed to the root portion 141 of the feed arm 140. Has been.

  Next, the intermittent operation of the tray feed rod 121 will be described with reference to FIGS.

  It is assumed that the seedling table 110 is moved in the right direction, that is, in the direction of arrow F (see FIG. 5) by the rotation of the lead cam shaft 171. At that time, the longitudinal feed rotation shaft 151 is rotated in the direction of arrow E (see FIG. 6).

  In the meantime, the take-out device 200 sequentially takes out the seedlings 22 from the seedling raising pot 21 at the right end and supplies the seedlings 22 to the planting tool 11, and then the leftmost end when the seedling placement stand 110 moves to the rightmost end. The seedling 22 of the nursery pot 21 is taken out by the take-out device 200. Thereby, all the seedlings 22 for one horizontal row of the seedling pot 21 are taken out.

  At this time, it is rotatably attached to the front end portion of the vertical feed drive arm 150 which is rotated in the direction of arrow E together with the vertical feed rotary shaft 151 and which is fixed to the right end of the vertical feed rotary shaft 151. Since the check roller 152 is configured to start contact with the curved edge portion 131a of the feed rod arm 130 after a short delay after the contact with the first recess 143a of the feed arm 140 is started, the tray feed rod 121 is After the feed arm 140 has once moved upward with the clockwise rotation of the feed arm 140, it starts to rotate counterclockwise around the axis of the tip end portion 142.

  That is, when the tray feed rod 121 is once moved upward in the direction of the arrow 121a0 (see FIGS. 5B and 6), the protrusion 121ab of the tray feed rod 121 that has been held by the notch 112a until then. However, the center portion 121a of the tray feed rod 121 that has been waiting in the gap 21a on the back side of the seedling pot 21 is also moved upward in the direction of the arrow 121a0 within the range of the gap 21a. . Thereafter, the feed rod arm 130 starts to rotate counterclockwise about the axis of the tip end portion 142, whereby the central portion 121a of the tray feed rod 121 moves in the direction of the arrow 121a1 (see FIG. 6). In addition, the notch depth of the notch part 112a is set to such an extent that the center part 121a of the tray feed rod 121 can move within the range of the gap 21a.

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 continues to contact the curved edge portion 131a of the feed rod arm 130, so that the central portion 121a of the tray feed rod 121 is positioned in the retreat groove 111a. Maintained. At this time, the check roller 152 simultaneously moves from the first concave portion 143a of the feed arm 140 toward the second convex portion 143b, so that the feed arm 140 further rotates clockwise, and the central portion 121a of the tray feed rod 121 is As a result, it moves in the direction of the arrow 121a2 (see FIG. 6) while maintaining the state of being located in the retreat groove 111a.

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 is not in contact with the curved edge portion 131a of the feed rod arm 130, and at the same time, the feed rod arm 130 is moved by the restoring force of the feed rod arm tension spring 161. The central portion 121a of the tray feed rod 121 is instantaneously rotated clockwise about the axis of the tip portion 142, so that the arrow 121a3 is directed from the gap 21a toward the gap 21b located on the upper side by one row of the seedling pot 21. Move as shown in.

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 moves while being in contact with the third recess 143 c of the feed arm 140, so that the feed arm 140 is moved downward by the restoring force of the feed arm tension spring 160. As a result, the central portion 121a of the tray feed rod 121 moves in the direction of the arrow 121a4 (see FIG. 6) while maintaining the state of being located in the gap 21b. The protrusion 121ab of 121a is held by the notch 112a.

  And the center part 121a of the tray feed rod 121 moved in the direction of the arrow 121a4 (see FIG. 6) maintains the state of being positioned in the gap between the seedling pots on the back side of the seedling pot 21, and the seedling stand 110 is When the movement starts in the arrow G direction, that is, the left direction, the take-out device 200 sequentially takes out the seedlings 22 from the seedling pot 21 at the left end and supplies the seedlings 22 to the planting tool 11. The seedling 22 of the rightmost breeding pot 21 is taken out by the take-out device 200 at the time of moving to. Thereby, all the seedlings 22 for one horizontal row of the seedling pot 21 are taken out.

  During this time, the projection 121ab of the central portion 121a of the tray feed rod 121 is held by the notch 112a, so that the tray 20 moves downward due to the weight of the seedling 22 placed in the seedling pot 21. Can be prevented.

  In addition, when all the seedlings 22 for one horizontal row of the seedling pot 21 are taken out, unlike the above, it can be freely rotated at the front end portion of the vertical feed driving arm 150 fixed to the center position of the vertical feed rotary shaft 151. The attached check roller 152 starts contact between the curved edge 131a of the feed rod arm 130 and the first recess 143a of the feed arm 140.

  By repeating the above-described operation, the tray 20 is moved rightward or leftward, and is intermittently vertically fed by one row of the seedling pot 21.

  Thereby, the tray vertical feeding device 120 having a compact structure is obtained. Further, the tray conveyance path 111 can be supported so as to be movable left and right with a simple structure of the guide rail 155 and the lead cam shaft 171.

  Further, since the central portion 121a of the tray feed rod 121 is disposed on the flat surface portion 111b of the tray conveying path 111, the tray 20 does not bend inward, so that a gap with a certain width is provided on the back side of the seedling pot 21. Since 21a and 21b can be secured, the tray feed rod 121 can surely enter the gaps 21a and 21b.

  Further, since the curved surface portion 111c is provided on the downstream side of the flat surface portion 111b of the tray conveyance path 111, the tray 20 bends along the curved surface. Therefore, even when the tray feed rod 121 is moving in the direction of the arrow 121a2 during tray feeding, the bending becomes resistance, and the tray 20 is prevented from shifting to the downstream side.

  Next, the seedling planting device 300 and the seedling planting device driving mechanism 400 described above will be further described with reference to FIGS. 10, 11, and 12.

  FIG. 10 is a left side view of the seedling planting device 300 and the seedling planting device driving mechanism 400.

  FIG. 11 is a schematic right side view for explaining the internal configuration of the seedling planting device driving mechanism 400, the regulating arm 460, and the driving device 1400 arranged on the right side surface of the seedling planting device driving mechanism 400. .

  12A is a plan view of the driving device 1400 and the stopper arm 1410 which are a part of the seedling planting device driving mechanism 400, and FIG. 12B is a back view of the driving device 1400 and the stopper arm 1410. FIG. 12C is a right side view of the driving device 1400 and the stopper arm 1410.

  As shown in FIG. 10, the seedling planting apparatus 300 includes a planting tool 11 for planting the seedling 22 in a field, an upper arm 311 and a lower arm arranged in parallel with each other for swinging the planting tool 11 in the vertical direction. A swing link mechanism 310 having an arm 312 and a vertically moving arm 320 that is rotatably attached to the lower arm 312 via a first connecting shaft 321 and moves the swing link mechanism 310 up and down are provided. The first connecting shaft 321 is fixed to the vertical movement arm 320.

  In addition, the vertical movement arm drive shaft 440 for rotating the vertical movement arm 320 is provided so as to protrude from the seedling planting device drive mechanism 400, and the vertical movement arm 320 is fixed to the tip portion thereof.

  Further, as shown in FIG. 10, the seedling planting device 300 is rotatably attached to the lower arm 312 via the second connection shaft 341 and opens and closes the planting tool 11, and the first connection shaft 321. And is rotated around the second connecting shaft 341 while being in contact with the outer peripheral edge of an opening / closing roller 342 that is pivotably attached to the tip of the opening / closing arm 340 via the third connecting shaft 343. Thus, the opening / closing cam 322 that swings the opening / closing arm 340 in the front-rear direction, one end 351 is connected to the third connection shaft 343 at the tip of the opening / closing arm 340, and the other end 352 is the opening / closing mechanism of the planting tool 11. And an open / close connection cable 350 connected to the 11a side.

  Here, the swing link mechanism 310 described above will be further described.

  That is, as shown in FIG. 10, the swing link mechanism 310 is supported by the front upper end portion 401a of the casing 401 housing the seedling planting device drive mechanism 400 so that the upper end is rotatably supported by the upper front shaft 313a, and the lower end is A front swing arm 316a that is rotatably connected to a connection support plate 315 via a lower front shaft 314a, and a rear upper end portion 401b that houses a seedling planting device drive mechanism 400, an upper end is an upper rear portion. An upper shaft provided on the connection support plate 315, having a rear swing arm 316b supported rotatably on the shaft 313b and having a lower end rotatably connected to the connection support plate 315 via the lower rear shaft 314b. The front end of the upper arm 311 described above is rotatably connected to 316, and the front end of the lower arm 312 described above is rotatably connected to the lower rear shaft 314b of the connection support plate 315. Each of the rear end of the upper arm 311 and lower arm 312 is pivotally connected to the rotating upper shaft 317a and the rotation under shaft 317b provided on the support plate 317 of the planting device 11.

  In addition, the seedling 22 of this Embodiment corresponds to an example of the transplant of this invention.

  With the above configuration, when the rotational driving force is transmitted to the vertical movement arm drive shaft 440 in the seedling planting device drive mechanism 400, the vertical movement arm 320 fixed to the vertical movement arm drive shaft 440 rotates in the direction of the arrow A1. By moving, the lower arm 312 and the upper arm 311 repeatedly swing up and down and swing back and forth, so that the planting operation of the seedling 22 by the planting tool 11 is performed with respect to the ridge U. Automatically done at intervals.

  Further, when the vertical movement arm 320 to which the first connecting shaft 321 is fixed rotates in the direction of arrow A1 during the planting operation, the opening / closing cam 322 fixed to the first connecting shaft 321 becomes the opening / closing roller. Since it rotates while contacting the outer peripheral edge of 342, the open / close arm 340 swings (rotates) forward (counterclockwise) about the second connecting shaft 341. Along with this operation, one end 351 of the open / close connection cable 350 is pulled in the forward direction, so that the open / close mechanism 11a operates to open the planting tool 11.

  Further, when the open / close arm 340 swings (rotates) backward (clockwise) about the second connecting shaft 341, the planting tool 11 provided in the open / close mechanism 11a is always biased in the closing direction. The one end 351 of the opening / closing connection cable 350 is pulled rearward by the action of a spring (not shown), so that the opening / closing mechanism 11 a operates to close the planting tool 11.

  With the above configuration, since the vertical movement arm 320 is driven by one axis, the structure is simple, and the vertical movement arm 320, the opening / closing arm 340, and the opening / closing cam 322 can be configured compactly, and the planting operation can be performed smoothly.

  Next, a clutch mechanism for turning on and off the transmission to the vertical movement arm drive shaft 440 in the seedling planting device drive mechanism 400 arranged on the right side of the seedling planting device 300 in plan view (see FIG. 2) will be mainly described with reference to FIG. This will be further described with reference to FIG.

  As shown in FIG. 11, the seedling planting device drive mechanism 400 includes a first gear 410 and a first gear 410 for transmitting the planting driving force output from the planting transmission device 18 to the planting clutch 420. When the planting clutch 420 and the planting clutch 420 are in the “ON” state, the transmission to the vertical movement arm drive shaft 440 is switched to the “ON” state or “OFF” state. A second gear 430 receiving a driving force from a transmission gear 421a fixed to the transmission shaft 421 of the planting clutch 420, and a small-diameter gear 430a fixed coaxially with the second gear 430. The third gear 450 fixed to the vertical movement arm drive shaft 440 is rotatably arranged so as to be engaged with the vertical movement arm drive shaft 440. Here, when the planting clutch 420 is in the “disengaged” state, the transmission shaft 421 of the planting clutch 420 stops without rotating and does not transmit the driving force to the second gear 430.

  In addition, you may use the conventional fixed position stop clutch as the planting clutch 420 of this Embodiment.

  Further, as shown in FIG. 11, the seedling planting device drive mechanism 400 is provided on the transmission downstream side of the planting clutch 420 and is fixed to the vertical movement arm drive shaft 440, and the planting clutch 420 is moved from the “entered” state. In order to forcibly switch to the “cut” state, an intermittent cam 441 having a convex portion 441 a formed at a part of a circular outer peripheral edge portion, and a tip end portion to contact the outer peripheral edge portion of the intermittent cam 441. A rotary shaft 461 having a first arm 460A arranged and having a second arm 460B arranged so that the tip portion thereof can be brought into contact with and separated from the planting clutch 420 and rotatably supported by the casing 401. And a restriction arm 460 fixed to the head.

  Here, when the tip end portion of the first arm 460A abuts on the convex portion 441a of the intermittent cam 441, the restriction arm 460 rotates counterclockwise about the rotation shaft 461 in the right side view (see FIG. 11). The tip of the second arm 460B comes into contact with the planting clutch 420, and the tip of the first arm 460A contacts the outer peripheral edge of the intermittent cam 441 other than the convex portion 441a. As a result of the contact, the regulating arm 460 rotates clockwise about the rotation shaft 461 (see arrow N in FIG. 11) in the right side view, and the distal end portion of the second arm 460B is detached from the planting clutch 420. It is the structure which separates.

  In addition, when the tip of the second arm 460B is separated from the planting clutch 420, the planting clutch 420 enters an “on” state, and when the tip of the second arm 460B contacts the planting clutch 420, the planting clutch 420 is engaged. Is in a “cut” state.

  The intermittent cam 441 of the present embodiment is an example of the cam member of the present invention, and the restriction arm 460 of the present embodiment is an example of the restriction member of the present invention.

  Moreover, the drive device 1400 of the seedling planting device drive mechanism 400 includes a stopper arm 1410 having one end fixed to the rotating shaft 461 and a stopper arm 1410 on the right side as shown in FIGS. When viewed from the right side, the tension spring 1420 and the stopper arm 1410 that are always urged in a direction to rotate clockwise about the rotation shaft 461 (see arrow N in FIG. 11) A stopper plate 1430 that restricts clockwise rotation (see arrow N in FIG. 11) at the center and a solenoid 1440 that drives the stopper plate 1430 in the left-right direction of the traveling vehicle body 15 are provided.

  One end of the tension spring 1420 is attached to the upper end side of the stopper arm 1410, and the other end is attached to the upper end side of the casing 401.

  Further, a rod-like rod 1443 movable in the left-right direction of the traveling vehicle body 15 protrudes from the right side surface portion 1440a of the solenoid 1440 (see FIGS. 12A and 12B), and the tip of the rod-like rod 1443 is cut off. The root portion 1431 of the stopper plate 1430 is connected to the notch portion.

  The solenoid 1440 is fixed on a rectangular solenoid mounting plate 1441 in a plan view, and the distal end portion of the stopper arm 1410 is disposed on the distal end side (the right side in FIG. 12A) of the solenoid mounting plate 1441. A first notch portion 1441 a into which 1410 a can enter is provided along the front-rear direction of the traveling vehicle body 15.

  Further, a solenoid fixing angle 1442 (see FIG. 12B) bent in a substantially L shape in a rear view is fixed to the lower surface of the solenoid mounting plate 1441 on the front end side. The solenoid fixing angle 1442 is also provided with a second cutout portion 1442a (see FIG. 12B) having the same shape at a position corresponding to the first cutout portion 1441a. A portion bent downward of the solenoid fixing angle 1442 is fixed to the upper end portion of the casing 401 by a fastening member 1442b.

  On the other hand, the stopper plate 1430 has a flange portion 1432 whose vertical width is wider than other portions between the root portion 1431 and the tip portion, and a certain vertical width is provided at a portion beyond the flange portion 1432. The action part 1433 having the lower end part and a non-action part 1434 whose vertical width is narrower than that of the action part 1433 are formed. The action portion 1433 has a function of restricting the movement of the stopper arm 1410 in the direction of the arrow N when the tip end portion 1410a of the stopper arm 1410 contacts, and the non-action portion 1434 passes through the tip portion 1410a of the stopper arm 1410. Thus, the stopper arm 1410 has a function of permitting movement in the arrow N direction.

  A back plate 1460 is fixed to the top surface of the solenoid mounting plate 1441 on the front end side by a fastening member 1460a. The back plate 1460 includes a first back plate 1461, a second back plate 1462 that is bent at a right angle from the front end 1461b of the first back plate 1461, and extends rightward with respect to the lateral width direction of the traveling vehicle body 15. The third back plate 1463 is further bent at a right angle from the lower end of the second back plate 1462 and extends in the forward direction with respect to the front-rear direction of the traveling vehicle body 15.

  The first back plate 1461 is disposed in parallel to the right side surface portion 1440a of the solenoid 1440 and has a rectangular slit 1461a. The upper and lower widths of the slit 1461a are configured such that the action portion 1433 of the stopper plate 1430 penetrates and can move in the directions of the arrows Q1 and Q2, but the flange portion 1432 of the stopper plate 1430 cannot penetrate. ing.

  Further, the second back plate 1462 has a third notch portion 1462a extending in the vertical direction into which the tip end portion 1410a of the stopper arm 1410 can enter.

  Further, the third back plate 1463 has a fourth notch portion 1463a communicating with the lower end portion of the third notch portion 1462a of the second back plate 1462, into which the tip end portion 1410a of the stopper arm 1410 can enter. .

  The fourth cutout portion 1463a of the third back plate 1463, the first cutout portion 1441a of the solenoid mounting plate 1441, and the second cutout portion 1442a of the solenoid fixing angle 1442 are completely overlapped with each other in plan view. It is comprised so that it may do (refer Fig.12 (a)).

  Further, a compression spring 1450 is disposed between the flange portion 1432 of the stopper plate 1430 and the right side surface portion 1440a of the solenoid 1440, and the stopper plate 1430 is moved in the direction of the arrow Q1 (FIGS. 12A and 12B). ))).

  In the solenoid 1440 of this embodiment, when energization to the solenoid 1440 (a short-time energization by a pulse signal) is started from a control unit 800 (see FIG. 15) to be described later, the rod-shaped rod 1443 of the solenoid 1440 is energized. However, this is a configuration in which the compression spring 1450 is attracted in the direction of the arrow Q2 against the urging force in the direction of the arrow Q1.

  That is, when the rod-like rod 1443 is sucked in the direction of the arrow Q2 by starting energization of the solenoid 1440, the action portion 1433 of the stopper plate 1430 passes through the slit 1461a and is drawn to the solenoid 1440 side, and the non-action portion 1434. However, it moves to the front side of the tip portion 1410a of the stopper arm 1410. That is, when the solenoid 1440 is energized, the position of the stopper plate 1430 is switched from the operating state to the non-operating state.

  Therefore, the movement restriction on the distal end portion 1410a of the stopper arm 1410 by the action portion 1433 of the stopper plate 1430 is released, and the stopper arm 1410 rotates clockwise about the rotation shaft 461 (see the arrow N in FIG. 11). While rotating, the tip of the second arm 460B is separated from the planting clutch 420.

  As a result, the planting clutch 420 shifts from the “cut” state to the “on” state, and the driving force from the engine is transmitted to the vertical arm drive shaft 440 side via the planting clutch 420. Then, the intermittent cam 441 fixed to the vertical movement arm drive shaft 440 starts to rotate.

  Note that the position of the stopper plate 1430 in the non-acting state is indicated by a two-dot chain line in FIG.

  Here, in a state where the position of the stopper plate 1430 is in an inactive state and the distal end portion 1410a of the stopper arm 1410 is entering the first cutout portion 1441a to the fourth cutout portion 1463a, the solenoid 1440 is moved to. A case where the energization is stopped will be described.

  That is, in this case, since the suction force by the solenoid 1440 is lost, the stopper plate 1430 connected to the rod-shaped rod 1443 jumps out in the direction of the arrow Q1 by the urging force of the compression spring 1450, but the notch portion of the non-operation portion 1434 Among them, an edge 1434a (see FIG. 12B) adjacent to the action portion 1433 comes into contact with the inner surface side of the distal end portion 1410a of the stopper arm 1410, and movement in the arrow Q1 direction is prevented. And since the front-end | tip part 1410a of the stopper arm 1410 is still maintaining the state which has entered into the 1st notch part 1441a-the 4th notch part 1463a, the planting clutch 420 is the front-end | tip of 1st arm 460A. The portion is in contact with the convex portion 441a of the intermittent cam 441, and the “entering” state is maintained until the state shifts to the “cut” state.

  Then, the intermittent cam 441 fixed to the vertical movement arm drive shaft 440 continues to rotate, and the tip of the first arm 460A comes into contact with the convex portion 441a of the outer peripheral edge of the intermittent cam 441. The planting clutch 420 shifts from the “ON” state to the “OFF” state.

  Thereby, transmission of the driving force to the vertically moving arm drive shaft 440 side is stopped.

  Further, the tip end portion of the first arm 460A abuts on the convex portion 441a of the outer peripheral edge portion of the intermittent cam 441, so that the stopper arm 1410 rotates counterclockwise about the rotation shaft 461 (the arrow in FIG. 11). (See M).

As a result, until the stopper plate 1430, the end edge 1434a (see FIG. 12B) adjacent to the action portion 1433 is in contact with the inner surface of the tip end portion 1410a of the stopper arm 1410, and the stopper plate 1430 moves in the direction of the arrow Q1. Is released from the state in which the movement is blocked, and then jumps out in the direction of the arrow Q1 so that the flange portion 1432 is a slit 1461a of the first back plate 1461.
It stops in contact with the upper and lower peripheral edges.

  When the planting clutch 420 shifts from the “ON” state to the “OFF” state, the tip of the first arm 460A passes through the contact position with the convex portion 441a of the intermittent cam 441, The seedling planting device drive mechanism 400 is configured so that the intermittent cam 441 stops rotating.

  Accordingly, when the planting clutch 420 is in the “disengaged” state, the stopper plate 1430 is moved in the direction of the arrow Q2 by energizing the solenoid 1440, or the operator moves the tip 1430a of the stopper plate 1430 (FIG. 12 ( Since the position of the stopper plate 1430 is switched from the operating state to the non-operating state by manually pressing (see a)) in the direction of the arrow Q2 at an arbitrary timing, the stopper arm 1410 whose movement has been restricted by the operating portion 1433 until then. Movement of the distal end portion 1410a is permitted, the stopper arm 1410 is rotated clockwise about the rotation shaft 461 (see the arrow N direction in FIG. 11), and the planting clutch 420 is moved from the “disengaged” state to “ It is possible to shift to the “enter” state.

  With the above configuration, the driving device 1400 has a simple structure in which only the stopper plate 1430 is driven by the solenoid 1440, so that the solenoid 1440 can be reduced in size, and can be reduced in weight and cost.

  Further, a compression spring 1450 is provided between the collar portion 1432 of the stopper plate 1430 and the right side surface portion 1440a of the solenoid 1440 so that an operator can plant at any timing regardless of whether the solenoid 1440 is energized or not. Since the clutch 420 can be in the “on” state, the planting position can be manually adjusted temporarily.

  In addition, maintainability is improved.

  Further, the second back plate 1462 arranged in parallel to the surface of the stopper plate 1430 allows the stopper plate 1430 to move smoothly because the sliding portion with the stopper plate 1430 is a flat surface.

  The tension spring 1420 of the present embodiment is an example of the biasing member of the present invention, and the stopper plate 1430 of the present embodiment is an example of the stopper of the present invention. Further, the solenoid 1440 of the present embodiment is an example of the actuator of the present invention. Moreover, the compression spring 1450 of this Embodiment corresponds to an example of the accommodation mechanism of this invention.

  Further, the tension spring 1420 described above has the tip of the second arm 460B in the direction in which the planting clutch 420 is in the “engaged” state, and the tip of the first arm 460A on the outer peripheral edge of the intermittent cam 441. A spring for biasing in the pressing direction.

  According to the above configuration, the intermittent clutch 441 provided on the downstream side of the transmission of the planting clutch 420 can be used to change the planting clutch 420 from the “on” state to the “disconnected” state. A planting mechanism can be realized.

  Further, the first arm 460A and the second arm 460B are configured to rotate integrally around the rotation shaft 461, and the rotation shaft 461 is more intermittent than the transmission shaft 421 of the planting clutch 420. By arranging on the side, the first arm 460A and the second arm 460B can be configured rationally and compactly.

  Next, with reference to FIG. 11, the items A to B are centered on the operation of the planting clutch 420 and the intermittent cam 441 for turning on and off the transmission to the vertical movement arm drive shaft 440 in the seedling planting device drive mechanism 400. Each of the three scenes of C will be explained.

  A. When the solenoid 1440 is energized (short-term energization by a pulse signal), the rod-shaped rod 1443 at the tip of the solenoid 1440 is attracted in the direction of the arrow Q2 against the restoring force (extension force) of the compression spring 1450.

  As a result, the action portion 1433 of the stopper plate 1430 connected to the rod-shaped rod 1443 passes through the slit 1461a of the first back plate 1461 and is pulled to the solenoid 1440 side, and the non-action portion 1434 is the tip of the stopper arm 1410. It moves to the front side of the edge portion 1410a1 (see FIG. 11) of the portion 1410a.

  That is, when the solenoid 1440 is energized, the restriction of movement of the stopper arm 1410 relative to the distal end portion 1410a by the action portion 1433 of the stopper plate 1430 is released, and the stopper arm 1410 rotates clockwise about the rotation shaft 461. The tip end of the stopper arm 1410 enters the first cutout portion 1441a and the tip end of the second arm 460B is separated from the planting clutch 420 by rotating (see arrow N in FIG. 11).

  Thereby, the operation | movement of the following i) and ii) is performed because the front-end | tip part of the 2nd arm 460B leaves | separates from the planting clutch 420. FIG.

  i) When the planting clutch 420 is in the “engaged” state and the transmission shaft 421 rotates, a driving force is transmitted to the second gear 430 side, and the vertical movement arm drive shaft 440 is transmitted via the third gear 450. Starts to rotate.

  ii) On the other hand, the distal end portion of the first arm 460A is separated from the convex portion 441a formed on the outer peripheral edge portion of the intermittent cam 441 and along the surface of the outer peripheral edge portion 441b (until just before this, the first arm 460A). The tip of the shaft passes through the convex portion 441a of the intermittent cam 441 and stops at a position isolated from the outer peripheral edge, while the planting clutch 420 is in the “disengaged” state, and the vertical movement arm drive shaft 440 rotates. The intermittent cam 441 and the vertically moving arm 320 continue to rotate.

  The solenoid 1440 is energized for a short time. After the energization is stopped, the solenoid 1440 does not generate a suction force in the direction of the arrow Q2 (see FIG. 12A), and the rod-shaped rod 1443 The connected stopper plate 1430 moves in the direction of arrow Q1 by the urging force of the compression spring 1450.

  However, the stopper 1434a (see FIG. 12B) adjacent to the action portion 1433 among the notches of the non-action portion 1434 of the stopper plate 1430 has already entered the first notch portion 1441a. The arm 1410 abuts on the inner surface side of the tip portion 1410a and is prevented from moving in the arrow Q1 direction.

  That is, even after the energization of the solenoid 1440 is stopped, the state where the distal end portion 1410a of the stopper arm 1410 enters the first cutout portion 1441a is maintained, so that the distal end portion of the first arm 460A is intermittent cam. The state along the surface of the outer peripheral edge is maintained away from the convex portion 441a formed on the outer peripheral edge of 441.

  Therefore, while the tip end portion of the first arm 460A is separated from the convex portion 441a formed on the outer peripheral edge portion of the intermittent cam 441 and the state along the surface of the outer peripheral edge portion is maintained, the second arm Since the distal end portion of 460B is separated from the planting clutch 420, the planting clutch 420 can maintain the “on” state, and the planting tool 11 (see FIG. 10) can be rotated by the rotation of the vertical movement arm 320. ) Continues to move up and down (planting operation), and the planting tool 11 performs the planting operation only once while the intermittent cam 441 rotates once.

  B. Thereafter, when the intermittent cam 441 completes one rotation, and at the same time the tip of the first arm 460A rides on the convex portion 441a of the intermittent cam 441, the stopper arm 1410 rotates counterclockwise around the rotation shaft 461. It rotates around (see arrow M in FIG. 11).

Thus, the stopper plate 1430 has an end edge portion 1434a (see FIG. 12B) adjacent to the action portion 1433 until the tip end portion 1410a of the stopper arm 1410.
Is in contact with the inner surface facing the solenoid 1440 and released from the state where the movement in the direction of the arrow Q1 is prevented, and then jumps out in the direction of the arrow Q1 so that the flange portion 1432 is formed in the slit 1461a of the first back plate 1461. Stops in contact with the upper and lower peripheral edges. At this time, the action portion 1433 of the stopper plate 1430 is positioned on the front side of the end edge portion 1410a1 (see FIG. 11) of the tip end portion 1410a of the stopper arm 1410.

  On the other hand, when the tip end portion of the first arm 460A rides on the convex portion 441a of the intermittent cam 441, the tip end portion of the second arm 460B comes into contact with the planting clutch 420, and the planting clutch 420 is moved from the “entered” state. In the “cut” state, the vertical arm drive shaft 440 stops rotating.

  At this time, the intermittent cam 441 stops rotating at a position where the tip end portion of the first arm 460A has passed the contact position with the convex portion 441a of the intermittent cam 441.

  The distal end portion 1410a (see FIG. 11) of the stopper arm 1410 is prevented from rotating clockwise (see arrow N in FIG. 11) by the action portion 1433 (see FIG. 12B) of the stopper plate 1430. Therefore, the tip end portion of the second arm 460B maintains a state in contact with the planting clutch 420.

  Accordingly, the following operations i) and ii) are performed when the tip of the second arm 460B contacts the planting clutch 420.

  i) The planting clutch 420 is changed from the “ON” state to the “OFF” state, and the rotation of the transmission shaft 421 stops, so that the driving force is not transmitted to the second gear 430 side. 440 stops rotating.

  ii) On the other hand, the tip end portion of the first arm 460A remains in a position passing through the contact position with the convex portion 441a formed on the outer peripheral edge portion of the intermittent cam 441 (until this time, the first arm 460A The tip portion is along the outer peripheral edge 441b of the intermittent cam 441, and the planting clutch 420 is in the “on” state, and the vertical movement arm drive shaft 440 continues to rotate)), and the intermittent cam 441 and the vertical movement Since the arm 320 continues to stop rotating, the planting tool 11 (see FIG. 10) continues to stop the vertical movement (planting operation).

  C. After that, when the solenoid 1440 is energized at an arbitrary timing, the planting clutch 420 enters the “engaged” state, and the operation described in item A above is started.

  According to the said structure, the time which the vertical motion (planting operation | movement) of the planting tool 11 has stopped can be adjusted by controlling the said arbitrary timing which supplies with electricity to the solenoid 1440. FIG. Thereby, intermittent planting is possible with a simple configuration.

  Further, when the planting clutch 420 is in the “disengaged” state, the operator pushes the distal end portion 1430a (see FIG. 12A) of the stopper plate 1430 in the direction of the arrow Q2 at an arbitrary timing by hand. Since the position of the stopper plate 1430 is switched from the operating state to the non-operating state, the movement of the distal end portion 1410a of the stopper arm 1410 that has been restricted by the operating portion 1433 is allowed to move, and the stopper arm 1410 is moved to the rotating shaft 461. , The planting clutch 420 can be shifted from the “disengaged” state to the “entered” state.

  Next, the various operation levers and the operation unit 600 arranged near the pair of left and right handle grips 8L and 8R of the steering handle 8 will be described with reference to FIG. FIG. 13 is a plan view for explaining various operation levers and the operation unit 600 arranged in the vicinity of the pair of left and right handle grips 8L and 8R of the steering handle 8. FIG.

  As shown in FIG. 13, a main clutch lever 80 is provided in the vicinity of the left handle grip 8L of the steering handle 8, and an elevating operation lever 81 for operating the hydraulic elevating cylinder 10 is provided in the vicinity of the right handle grip 8R. Is provided.

  In FIG. 13, for example, the position of the main clutch lever 80 is different from the positions shown in FIGS. 1 and 2, but their arrangement may be anywhere and is limited to these positions. is not.

  The raising / lowering operation lever 81 is configured to be manually switchable in three stages of “lowering”, “neutral”, and “raising”, and when switched to the “lowering” position, the hydraulic lifting cylinder 10 is to lower the traveling vehicle body 15. When the operation is stopped and the lowering is stopped by a sensor plate 710 (see FIG. 14), which will be described later, and the planting on / off button 620 (see FIG. 13), which will be described later, is in an ON state, the planting clutch 420 enters an “on” state. Planting work is started.

  When the lifting operation lever 81 is switched to the “neutral” position, the planting operation is stopped. When the lifting operation lever 81 is switched to the “raised” position, the hydraulic lifting cylinder 10 operates to raise the traveling vehicle body 15.

  Further, as shown in FIG. 13, on the operation panel 601, in order from the left end to the right end, (1) an empty planting operation button for operating only the planting tool 11 in a state where the traveling of the traveling vehicle body 15 is stopped. 610, and (2) when the lifting operation lever 81 is operated to the lowering operation position for lowering the traveling vehicle body 15, the planting tool 11 is operated in conjunction with the lowering operation, and is not interlocked with the lowering operation. A planting on / off button 620 that switches to any one of the states, (3) a display unit 630 that displays at least between planted strains, and (4) an adjustment button 640 that adjusts at least between planted strains are arranged.

  With the above configuration, the planting on / off button 620 is arranged near the center of the operation panel 601, and thus it is easy to operate.

  Moreover, since the sky planting operation button 610 is disposed on the left side of the rear surface 601b different from the upper surface 601a on which other operation buttons are disposed, erroneous operations by the operator can be reduced.

  Further, since the display unit 630 is disposed near the center of the operation panel 601, it is easy to confirm.

  The adjustment button 640 includes an “up” push switch 640 a that changes the stock in the direction of expanding the stock, and a “down” push switch 640 b that changes in the direction of narrowing the stock on the lower side.

  With the above configuration, by operating the “raising” push switch 640a and the “lowering” push switch 640b, the numerical value indicating between stocks is directly displayed on the display unit 630, so that an operator can easily recognize between stocks.

  Next, with reference mainly to FIGS. 14 and 15, a solenoid 1440 for performing planting on / off based on the operations of the planting depth adjusting mechanism 700, the planting on / off button 620, the lifting operation lever 81, and the like. The control unit 800 that controls the operation will be mainly described.

  FIG. 14 is a left side view illustrating a schematic configuration of the planting depth adjusting mechanism 700, and FIG. 15 is a schematic configuration diagram illustrating input / output to the control unit 800.

  As shown in FIG. 14, the planting depth adjusting mechanism 700 includes (1) a sensor plate 710 having a gently curved bottom surface that holds the seedling planting depth constant by contacting the farm scene 701, and (2 ) A substantially L-shaped plate-like member in a side view, wherein an L-shaped bent portion is rotatably supported with respect to the traveling vehicle body 15 by a rotation support shaft 721, and one end 722 extending rearward is a sensor plate. The other end 723 that is pivotally connected to the front end 711 of the 710 and the pivot support shaft 722a and that extends upward is manually operated by an operator in the vertical (up and down) direction of the sensor plate 710. A depth arm 720 that is pivotably connected to the distal end portion 741 of the transmission rod 740 that transmits the movement of the depth lever 730 for setting the position; and (3) the depth arm 720 is swingable from the main frame 17. A hanging spring 750, (4) It is a substantially L-shaped plate-like member in a plan view, and an L-shaped bent portion is rotatably supported with respect to the traveling vehicle body 15 by a rotation support shaft 761, and a long hole is formed below the rotation support shaft 761. 762 is formed, and is urged by the tension spring 766 connected to the upper end portion 763 to rotate in the arrow Y direction with the rotation support shaft 761 as an axis, and is provided in the hydraulic pressure switching valve portion 40. A counter arm 760 having a front end portion 764 connected by a rod 765 with respect to a lift operation valve (not shown), and (5) a counter arm 771 is positioned so that the front end side of the elongated hole 762 of the counter arm 760 is positioned. A planting switch 770 disposed on the arm 760, and (6) a connecting pin 781a provided at one end 781 is inserted into the elongated hole 762, and the other end 782 is connected via a connecting shaft 783. The upper end 712 and rotatably coupled to a sensor rod 780 of capacitors plate 710, and a.

  Further, the sensor rod 780 is interlocked with the swing in the arrow Z direction of the upper end 712 of the sensor plate 710 by the upward swing of the sensor plate 710, so that the front end edge portion 781b of the one end 781 is turned on and off. It moves to the direction which pushes the detection lever 771, and is the structure which turns on the planting switch 770.

  According to the above configuration, since the depth arm 720 is suspended by the spring 750, rattling of the connecting portion between the depth arm 720 and the depth lever 730 is eliminated, and the depth set by the depth lever 730 is stable. To do. The spring 750 is configured to suspend the depth arm 720, but is not limited thereto, and may be configured to press the depth arm 720 against the main frame side, for example.

  Further, according to the above configuration, the counter arm 760 is pulled by the tension spring 766 in the direction of pushing down the sensor plate 710, so that the backlash between the sensor rod 780 and the counter arm 760 can be eliminated.

  Further, by changing the elastic force of the tension spring 766, the force pushing the sensor plate 710 can be changed.

  Next, a method for controlling the solenoid 1440 by the control unit 800 provided below the operation panel 601 will be described with reference to FIG.

  As shown in FIG. 15, the control unit 800 receives at least an on / off signal from the planting on / off button 620, a switching signal of the lifting operation lever 81, and an on / off signal from the planting switch 770. The pulse signal is output to the solenoid 1440.

  Based on the above configuration, the operation of the control unit 800 will be mainly described with reference to FIGS.

  Here, after moving the seedling transplanter 1 to a predetermined position in the field, (1) a scene where the planting operation is to be started, and then (2) a scene where the planter is traveling while planting in the field, and (3) The explanation will be divided into scenes that come to the edge of the kite and turn.

(1) Scenes where planting work is about to start:
When the seedling transplanter 1 is moved to a predetermined position in the field, the planting on / off button 620 is set to the “on” state, and the lifting operation lever 81 is set to the “up” position. Is in a high position.

  When the operator operates the elevating operation lever 81 to the “lower” position to lower the vehicle height of the traveling vehicle body 15, the sensor plate 710 is lowered together with the traveling vehicle body 15 toward the farm scene 701.

  When the sensor plate 710 comes into contact with the farm scene 701, the front end 711 of the sensor plate 710 rotates in the arrow Z direction, so that the front end edge 781b of the sensor rod 780 moves in the direction of pushing the on / off detection lever 771 and is planted. By turning on the switch 770, an ON signal from the planting switch 770 is input to the control unit 800.

  The control unit 800 outputs a signal indicating the “ON” state from the planting on / off button 620, a signal indicating the “down” position from the lifting operation lever 81, and an “ON” signal from the planting switch 770 under AND conditions. In response to this, a signal for energizing the solenoid 1440 is output.

  Thereby, the planting clutch 420 is switched from the “cut” state to the “on” state, and the planting operation is started.

(2) Scene of traveling while planting in the field:
Here, it is assumed that the raising / lowering operation lever 81 is in the “down” position, and the sensor plate 710 moves up and down according to the unevenness of the farm scene 701.

  In addition, the control unit 800 outputs a pulse signal at the operation cycle to energize the solenoid 1440 at a predetermined operation cycle. Accordingly, the planting clutch 420 enters the “ON” state when the solenoid 1440 is energized, and the intermittent cam 441 starts to rotate and completes one rotation (that is, the seedling planting operation is performed once). When finished, a series of operations of returning to the “off” state is repeated in the operation cycle.

  Thereby, a planting operation | work is performed intermittently and desired planting stock | strain is implement | achieved.

  In response to the vertical movement of the sensor plate 710, the hydraulic lifting cylinder 10 operates as follows.

  That is, when the sensor plate 710 moves upward, the front end 711 of the sensor plate 710 moves in the direction of the arrow Z around the rotation support shaft 722a, and the connecting pin 781a provided at one end 781 of the sensor rod 780 When moving in the direction of pushing the front edge of the long hole 762, the counter arm 760 rotates in the clockwise direction in FIG. 14 with the rotation support shaft 761 as the axis, and this movement is via the rod 765 and the hydraulic pressure switching valve. It is transmitted to an elevating operation valve (not shown) provided in the section 40 and is operated in the direction in which the hydraulic elevating cylinder 10 extends, and the vehicle height of the traveling vehicle body 15 is increased.

  On the other hand, when the sensor plate 710 moves downward, the front end portion 711 of the sensor plate 710 moves in the direction opposite to the arrow Z direction around the rotation support shaft 722a and is connected to one end portion 781 of the sensor rod 780. When the pin 781a moves in a direction away from the front edge portion of the long hole 762, the counter arm 760 rotates in the arrow Y direction with the rotation support shaft 761 as the axis by the pulling force of the tension spring 766, and this movement is the rod 765. Is transmitted to a lifting operation valve (not shown) provided in the hydraulic pressure switching valve portion 40, and the hydraulic lifting cylinder 10 is operated in a shorter direction, and the vehicle height of the traveling vehicle body 15 is lowered.

  By the above operation, even if the farm scene 701 is uneven, the planting depth of the seedling can be kept constant.

(3) A scene of turning to the edge of the kite:
In this scene, the operator moves the lifting operation lever 81 from the “lower” position to the “neutral” position in order to interrupt the planting operation.

  Accordingly, the control unit 800 receives the signal indicating the “neutral” position from the elevating operation lever 81 and stops outputting the pulse signal to the solenoid 1440. Thus, after the planting clutch 420 is switched from the “ON” state to the “OFF” state, the “OFF” state is continuously maintained, so that the planting operation is interrupted.

  Further, the operator moves the lifting / lowering operation lever 81 from the “neutral” position to the “raised” position in order to turn the traveling vehicle body 15 toward the adjacent saddle.

  In conjunction with the movement of the cable 82 in response to the operation of the elevating operation lever 81, the elevating operation valve (not shown) provided in the hydraulic pressure switching valve unit 40 is operated, and the hydraulic elevating cylinder 10 moves in the extending direction. As a result, the vehicle height of the traveling vehicle body 15 increases.

  At this time, the sensor plate 710 is lowered and the planting switch 770 is turned off, but no signal is output from the control unit 800.

  The planting clutch 420 is maintained in the “disengaged” state, and the state where the planting operation is interrupted is continued.

  Therefore, the worker turns the traveling vehicle body 15.

  Next, when the operator moves the elevating operation lever 81 from the “raised” position to the “lowered” position through the “neutral” position, the hydraulic pressure is moved in conjunction with the movement of the cable 82 according to the operation of the elevating operation lever 81. When the lifting operation valve provided in the switching valve unit 40 is operated and the hydraulic lifting cylinder 10 is moved in the direction of shortening, the vehicle height of the traveling vehicle body 15 begins to decrease. Note that a signal indicating that the elevating operation lever 81 is in the “down” position is output to the control unit 800 by the operation of the elevating operation lever 81.

  Then, when the vehicle body of the traveling vehicle body 15 descends and the sensor plate 710 eventually comes into contact with the farm scene 701, the planting switch 770 is turned on as described in the above item (1), and the signal is transmitted to the control unit. 800 is input.

  Since the planting on / off button 620 remains in the “on” state, the control unit 800 transmits a signal indicating the “on” state from the planting on / off button 620 and a signal indicating the “down” position from the elevating operation lever 81. When the “ON” signal is received from the planting switch 770 under the AND condition, a signal for energizing the solenoid 1440 is output. That is, similarly to the above, the control unit 800 outputs a pulse signal at the operation cycle so that the solenoid 1440 is energized at a predetermined operation cycle.

  Thereby, the planting clutch 420 is switched from the “cut” state to the “entered” state, and the planting operation is started again.

  With the above configuration, by setting the planting on / off button 620 to the “on” state, the above-described (1) planting operation is started only by operating the elevating operation lever 81, and then (2) the farm field. A series of operations can be carried out continuously, such as traveling while planting inside, and (3) planting again after coming to the end of the fence and turning.

  In the above embodiment, as an example of the actuator of the present invention, the configuration using the solenoid 1440 including the rod-shaped rod 1443 that is pulled in the Q2 direction (see FIG. 12A) when energized has been described. For example, as another example of the actuator of the present invention, a second rod-shaped rod (see reference numeral 1443 in FIG. 12A) that protrudes in the Q1 direction (see FIG. 12A) when energized is provided. An actuator may be used. In the case of this configuration, the arrangement of the action part and the non-action part of the second stopper plate (see reference numeral 1430 in FIG. 12B) connected to the second rod-shaped rod is different from the action part 1433 of the stopper plate 1430 described above. This is a configuration opposite to the arrangement of the action unit 1434. That is, in this configuration, when the current is supplied to the actuator and the second stopper plate protrudes in the Q1 direction, the tip end portion 1410a of the stopper arm 1410 passes through the non-acting portion, and the current supply to the actuator is stopped. When the second stopper plate is pulled in the Q2 direction, the distal end portion 1410a of the stopper arm 1410 abuts against the action portion, and movement in the forward direction of the machine body is restricted.

(Embodiment 2)
In the second embodiment, another seedling transplanter according to an embodiment of the transplanter of the present invention will be described with reference to FIGS. 16 to 18.

  In the present embodiment, the same components as those in the seedling transplanter 1 of the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted, and differences will be mainly described.

  That is, the seedling transplanter of the second embodiment includes a scraper device 1500 that drops mud and the like attached to the outer surface and the inner surface of the second planting tool 2011 in synchronization with the vertical movement of the second planting tool 2011. This is different from the configuration of the first embodiment.

  FIG. 16 is a schematic side view illustrating the scraper device 1500.

  FIG. 17 is a schematic plan view for explaining the scraper device 1500.

  FIG. 18 is a schematic side view for explaining the operation of the scraper device 1500.

  As shown in FIGS. 16 and 17, the scraper device 1500 includes a pair of left and right left hopper portions 1011L and a right hopper whose front end side opens and closes in the left and right direction near the bottom dead center while moving up and down along a trajectory T1 (see FIG. 1). A rubber scraper that is disposed behind the portion 1011R (see FIGS. 3 and 16) and scrapes the outer wall surface and the inner wall surface of the pair of left and right hoppers to remove mud and the like adhering to the inner wall surface. 1510 and a scraper fulcrum shaft fixed to the frame 15a of the traveling vehicle body 15 having a scraper attachment portion 1521 for attaching the scraper 1510 to the lower end portion 1520a and located above the second planting tool 2011 in a side view. 1522, a scraper arm 1520 having an upper end 1520b rotatably connected in the front-rear direction, and a left hopper ho Cam mounting pin erected outward from the left side surface of the holder holding frame 1013 that holds the der 1012L and the right hopper holder 1012R (see FIGS. 3B and 17) so as to be rotatable about the fulcrum shaft 1013a. And a scraper cam 1530 having a substantially half-moon shape fixed to the tip of 1533 in a side view.

  As shown in FIG. 16, the scraper cam 1530 has a substantially half-moon shape in a side view, but a substantially vertical first edge 1531 is formed on the upper end side, and an arcuate second edge is formed below the first edge 1531. 1532 is formed.

  Further, a scraper arm tension spring 1550 having one end hooked on the upper end portion 1520b of the scraper arm 1520 and the other end hooked on the frame 15a of the traveling vehicle body 15 is disposed, and the scraper arm 1520 includes the scraper arm 1520. Due to the contraction force of the arm tension spring 1550, a force to rotate counterclockwise in the left side view, that is, toward the rear side, is always acting with the scraper fulcrum shaft 1522 as the center of rotation.

  On the other hand, when the scraper arm 1520 is in the standard position (position when not scraped), the scraper arm 1520 hits the seedling tank frame 101 to stop the movement to rotate toward the rear side.

  An impact absorbing stopper (not shown) for absorbing an impact when the scraper arm 1520 hits the seedling tank frame 101 is provided between the scraper arm 1520 and the frame 15a.

  Further, a scraper roller stay 1541 that rotatably holds a scraper roller 1540 at the tip end portion is fixed to the left side surface of the lower end portion 1520a and the upper end portion 1520b of the scraper arm 1520. The roller 1540 is disposed at a position in contact with the scraper cam 1530 at a predetermined timing.

  With the above configuration, the scraper fulcrum shaft 1522 is fixed to the upper frame 15a of the traveling vehicle body 15 in a side view, and is fixed to the front side of the scraper 1510 in a normal non-operating state in which the scraper 1510 is retracted rearward. Therefore, the scraper 1510 is higher in the normal non-operating state than in the scraper operating state, and is less likely to interfere with the planted seedling.

  In addition, the 2nd planting tool 2011 of this Embodiment corresponds to an example of the planting hopper of this invention.

  Next, mainly using FIG. 18, the operation of the scraper device 1500 will be described in relation to the vertical movement of the distal ends of the pair of left and right hopper portions 1011L and 1011R of the second planting tool 2011.

  (1) After the second planting tool 2011 has planted the seedling 22 in the field, a pair of left and right hopper portions 1011L and 1011R move to the hopper first position T1a on the trajectory T1, and further left and right pairs from there. A scene in which the tips of the hopper parts 1011L and 1011R rise will be described.

  In this scene, the pair of left and right hopper portions 1011L, 1011R is in the ascending process with the tip open, and the scraper cam 1530 fixed via the cam mounting pin 1533 on the left side surface of the holder holding frame 1013 is the same. To rise.

  That is, when the scraper cam 1530 rises to the first cam position 1530a corresponding to the first hopper position T1a, the scraper roller of the scraper arm 1520 in which the tip of the scraper cam 1530 is located at the standard position. By contacting the rear side of the lower end surface of 1540, the scraper roller 1540 is moved forward, and the scraper arm 1520 starts moving forward (see arrow S in FIG. 18).

  Further, the scraper cam 1530 also rises as the tips of the pair of left and right hopper portions 1011L, 1011R rise in a substantially vertical direction. As the scraper cam 1530 rises, the scraper roller 1540 moves on the first edge 1531 on the upper end side of the scraper cam 1530, but the first edge 1531 has a substantially vertical end surface. Therefore, the scraper arm 1520 and the scraper 1510 remain in the same position without moving in the front-rear direction.

  As a result, the tip portion 1511 (see FIG. 17) of the scraper 1510 staying at the same position enters the rear V-shaped cutout portion 1200B of the pair of left and right hopper portions 1011L and 1011R, and both ends of the scraper 1510. The front end side of the portion 1512 scrapes the outer wall surfaces of the pair of left and right hopper portions 1011L and 1011R.

  (2) The case where the second planting tool 2011 continues to rise and the tips of the pair of left and right hoppers 1011L and 1011R move to the hopper second position T1b on the trajectory T1 will be described.

  In this scene, the pair of left and right hopper portions 1011L and 1011R is in the ascending process with the tips thereof open, and the scraper cam 1530 is also raised in the same manner.

  That is, as the scraper cam 1530 rises to the cam second position 1530b corresponding to the hopper second position T1b, the arc-shaped end surface of the second edge portion 1532 of the scraper cam 1530 becomes the rear end surface of the scraper roller 1540. Further, the scraper roller 1540 is moved forward while being in contact with.

  At the same time, the scraper arm 1520 further moves to the front side (see arrow S in FIG. 18), and the scraper 1510 enters the inside from the rear gap between the pair of left and right hopper portions 1011L and 1011R.

  (3) Then, the second planting tool 2011 further rises, and the tips of the pair of left and right hopper portions 1011L and 1011R reach the hopper third position T1c on the trajectory T1 from the hopper second position T1b on the trajectory T1. The operation of the scraper 1510 in the process up to here will be described.

  In this process, as the scraper cam 1530 rises from the cam second position 1530b corresponding to the hopper second position T1b to the cam third position 1530c corresponding to the hopper third position T1c, the scraper cam 1530 The scraper 1510 moves slightly forward as shown in FIG. 18 because the arc-shaped surface having a relatively gentle curve in the side view of the second edge 1532 rises in contact with the rear end surface of the scraper roller 1540. And the same height is maintained inside the pair of left and right hopper portions 1011L and 1011R.

  However, since the second planting tool 2011 continues to move upward, the tip 1511 and both ends 1512 of the scraper 1510 effectively squeeze mud and the like attached to the inner wall surfaces of the pair of left and right hoppers 1011L and 1011R. Can be removed.

  (4) Then, when the second planting tool 2011 further rises and the tips of the pair of left and right hopper portions 1011L and 1011R pass through the hopper third position T1c on the trajectory T1, the scraper cam 1530 becomes the hopper third The cam moves to a position above the scraper roller 1540 at a third cam position 1530c corresponding to the position T1c. As a result, the scraper roller 1540 is released from contact with the scraper cam 1530, and the scraper arm 1520 is moved rearward at a stretch by the contraction force of the scraper arm tension spring 1550, and the scraper 1510 is a pair of left and right hopper portions. It stops when it comes out of the inside of 1011L and 1011R and hits the seedling tank frame 101. At this time, a shock absorbing stopper (not shown) absorbs the shock when stopped.

  Thereafter, the second planting tool 2011 closes the distal ends of the pair of left and right hopper portions 1011L and 1011R near the top dead center, moves on the trajectory T1, and repeats the operations (1) to (4).

  Accordingly, the scraper device 1500 including the scraper 1510 can be housed in a narrow space, the body can be made compact, the amount of movement of the scraper 1510 can be secured, and the outer and inner surfaces of the pair of left and right hopper portions 1011L and 1011R Can be scraped accurately.

(Embodiment 3)
In the third embodiment, still another seedling transplanter according to an embodiment of the transplanter of the present invention will be described with reference to FIGS.

  In the present embodiment, the same components as those in the seedling transplanter 1 of the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted, and differences will be mainly described.

  That is, the seedling transplanting machine of the third embodiment is provided with a pair of left and right crawler traveling devices instead of the pair of left and right rear wheels 3 of the seedling transplanting machine of the above embodiment. Different from transplanter.

  First, the crawler traveling device 500 of the seedling transplanter 1 of the present embodiment will be described with reference to FIG.

  FIG. 19 is a schematic side view showing the left crawler traveling device 500, the left traveling transmission case 60, and the left driven front wheel 2 in the planting work posture of the seedling transplanter 1 of the present embodiment.

  The right crawler traveling device 500, the right traveling transmission case 60, and the right driven front wheel 2 of the seedling transplanter 1 of the present embodiment are the left crawler traveling device 500, the left traveling transmission case 60, and the left driven front wheel 2. Since the configurations are the same, the description thereof is omitted.

  As described above, the traveling transmission case 60 is configured to be rotatable about the input shaft 61, and the rotational driving force from the engine 12 is input to the input shaft 61 and decelerated at a predetermined reduction ratio. And transmitted to the output shaft 62.

  The output shaft 62 protrudes outward from the traveling transmission case 60, and the driving wheel 510 of the crawler traveling device 500 is attached to the distal end side of the output shaft 62.

  As shown in FIG. 19, the crawler traveling device 500 includes a drive wheel 510, a driven wheel 520, a first idler wheel 531, a second idler wheel 532, the drive wheel 510, a driven wheel 520, and a first wheel. An idler wheel 531 and a synthetic rubber crawler 540 wound around the outer edge of the second idler wheel 532 and having a plurality of protrusions integrally formed on the outer peripheral surface thereof.

  Further, the drive wheel 510 is provided with a sprocket brake 511, and is driven using frictional force with the drive wheel 510 in conjunction with the operation of the side clutch levers 85 provided on the left and right steering handles 8, respectively. In this configuration, the ring 510 is stopped.

  A side clutch lever 85 provided on the right steering handle 8 has a side clutch cable (not shown) for turning on and off the driving force to the input shaft 61 of the right traveling transmission case 60, and a right clutch. A sprocket brake cable (not shown) for turning on / off a sprocket brake 511 provided on a drive wheel 510 attached to the output shaft 62 of the traveling transmission case 60 is connected.

  The side clutch lever 85 provided on the left steering handle 8 has the same configuration as described above.

  As a result, by operating one of the left and right side clutch levers 85, transmission of the driving force to the driving wheel 510 on the operated side becomes “OFF”, and rotation due to inertia of the driving wheel is braked. Therefore, the crawler 540 on the operated side can be braked accurately, and the traveling vehicle body 15 can be turned slightly.

  Further, as shown in FIG. 19, the crawler traveling device 500 includes a traveling transmission case side support plate 550 and a driven rolling wheel support plate for fixing the driven wheel 520 to the traveling transmission case 60 so as to be slidable in the front-rear direction. 560 and an idler wheel support plate 570 that is swingably connected to the driven wheel support plate 560 via a support pin 571 and supports the first and second idler wheels 531 and 532. doing.

  Further, as shown in FIG. 19, a compression spring 572 is provided between the upper right end side of the idler wheel support plate 570 and the lower right end portion of the driven wheel support plate 560.

  As a result, when the seedling transplanter 1 is lifted with the downward movement of the traveling transmission case 60 and the crawler 540, the compression spring 572 causes the second idler wheel 532 disposed on the rear side to face the crawler grounding surface 540a. In order to push, the ground load is mainly received by the rear second idler wheel 532, and the change in the ground load between the front wheel 2 and the crawler 540 can be reduced.

  Further, as shown in FIG. 19, the height from the ground of the support pin 571 to which the idler wheel support plate 570 is swingably connected, and the height from the ground of the input shaft 61 as the rotation fulcrum of the traveling transmission case 60. Therefore, the change in the contact load between the front wheel 2 and the crawler 540 is reduced because the traveling transmission case 60 and thus the crawler 540 are less moved back and forth in the vertical movement.

  Further, the front end portion of the traveling transmission case side support plate 550 is directly fixed to the rear end portion of the traveling transmission case 60, and two through holes (not shown) are provided in the central portion and the rear end portion.

  On the other hand, on the front end side of the driven wheel support plate 560, two long holes 561 corresponding to the two through holes provided in the traveling transmission case side support plate 550 described above are provided. By tightening a nut (not shown) to the bolt 562 inserted into the through-hole from the hole 561 side, the driven wheel support plate 560 has a width before and after the elongated hole 561 with respect to the traveling transmission case side support plate 550. It is the structure fixed so that a slide movement is possible in the front-back direction within the range.

  Further, in the seedling transplanter 1 of the present embodiment, the traveling transmission case 60 is being planted around the input shaft 61 with the driven front wheel 2 and the crawler grounding surface 540a of the crawler traveling device 500 in contact with the horizontal plane. 2, the two long holes 561 are located below the driven wheel shaft 521 of the driven wheel 520 and the first free rotation of the first free wheel 531 in a side view. The wheel shaft 531a and the second free wheel 532 are positioned above the second free wheel shaft 532a (see FIG. 19).

  As a result, the tension of the crawler 540 can be easily adjusted.

  Further, according to the above configuration, the hydraulic lifting cylinder 10 expands and contracts in response to the switching operation of the lifting operation lever 81 and the vertical movement of the sensor plate 71 during the planting operation, and the traveling transmission case 60 rotates the input shaft 61 about the rotation center. , The crawler traveling device 500 moves upward while holding the crawler ground contact surface 540a in a horizontal state, so that the vehicle height decreases.

  On the other hand, when the traveling transmission case 60 rotates clockwise around the input shaft 61, the crawler traveling device 500 moves downward while holding the crawler grounding surface 540a in a horizontal state, so the vehicle height is high. Become.

  The left and right driven front wheel support rods 211 are attached to the left and right ends of the driven front wheel support stay 210 provided below the engine 4 so that the height can be adjusted, and the driven front wheels 2 are respectively attached to the lower ends of the left and right driven front wheel support rods 211. It is pivotally attached.

  Further, in the seedling transplanter 1 of the present embodiment, the range of rotation during the planting operation of the traveling transmission case 60 around the input shaft 61 with the driven front wheel 2 and the crawler grounding surface 540a in contact with the horizontal plane. Inside, in a side view, the driven wheel shaft 521 of the driven wheel 520 is located above the output shaft 62, and the first idle wheel shaft 531 a and the second idle wheel shaft 532 a are from the output shaft 62. Is also located on the lower side (see FIG. 19).

  Further, the seedling transplanter 1 of the present embodiment has a configuration in which the output shaft 62 is higher than the input shaft 61 in a side view when the driven front wheel 2 and the crawler grounding surface 540a are in contact with the horizontal plane.

  As a result, the difference in height between the input shaft 61 of the traveling transmission case 60 and the crawler grounding surface 540a is reduced, so that the crawler traveling apparatus 500 is moved up and down by the rotation of the traveling transmission case 60 in the direction of arrow A during planting work. The back and forth movement of the crawler grounding portion 540a due to the movement can be suppressed.

  Further, by providing the input shaft 61 and the output shaft 62 individually in the traveling transmission case 60 and attaching the drive wheels 510 to the output shaft 62, the distance between the drive wheels 510 and the rear second idler wheel 532 is shortened. The crawler traveling device 500 can be shortened in the front-rear width W.

  Further, in the seedling transplanter 1 of the present embodiment, the range of rotation during the planting operation of the traveling transmission case 60 around the input shaft 61 with the driven front wheel 2 and the crawler grounding surface 540a in contact with the horizontal plane. Inside, the driven wheel shaft 521 on the front side of the intermediate position in the front-rear direction of the first and second rotating wheel shafts 531a and 532a is disposed in a side view (see FIG. 19).

  Accordingly, the crawler traveling device 500 can be configured in a compact manner, and the crawler traveling device 500 can be prevented from interfering with other members (for example, a seedling tank) by the vertical movement of the crawler traveling device 500.

  In the above embodiment, the configuration has been described in which the driven wheel 520 is fixed to the traveling transmission case 60 so as to be slidable in the front-rear direction. In addition to this configuration, as shown in FIG. The traveling device 2500 may be configured to be slidable in the left-right direction with respect to the second traveling transmission case 360. FIG. 20 is a schematic perspective view of a connecting portion when the left second crawler traveling device 2500 is configured to be slidable in the left-right direction with respect to the left second traveling transmission case 360. Here, the same reference numerals are given to the same components as those in the above embodiment, and the description thereof is omitted. Further, the second crawler traveling device (not shown) on the right side has the same configuration as the second crawler traveling device 2500 on the left side, and thus the description thereof is omitted.

  In the configuration example shown in FIG. 20, the output shaft 62 protrudes outward from the center position in the front-rear direction of the side surface of the second traveling transmission case 360 and is coaxial with the input shaft 61 disposed on the front side of the output shaft 62. The front slide shaft 361 protrudes in parallel with the output shaft 62 from the side surface of the second traveling transmission case 360 to the outside at the position and is fixed by welding, and the second traveling transmission case 360 is disposed on the rear side of the output shaft 62. A rear slide shaft 362 protrudes in parallel with the output shaft 62 from the side surface to the outside and is fixed by welding.

  On the other hand, the second crawler traveling device 2500 includes a second traveling transmission case side support plate 2550 instead of the traveling transmission case side support plate 550 directly fixed to the rear end portion of the traveling transmission case 60 of the above embodiment. Is provided.

  Further, the second travel transmission case side support plate 2550 is connected to the second travel transmission case 360 via a front slide shaft 361 and a rear slide shaft 362 so as to be slidably movable, and A rear pipe member 2552 and a central pipe member 2553 for passing through the output shaft 62 are connected.

  That is, the rear pipe member 2552 is fixed to the front end portion of the second traveling transmission case side support plate 2550, and the central pipe member 2553 is connected and fixed to the rear pipe member 2552 via the rear fixing plate 2554B. The front pipe member 2551 is connected and fixed to the central pipe member 2553 via a front fixing plate 2554F.

  The second traveling transmission case side support plate 2550 is provided with two through holes (not shown) corresponding to the two long holes 561 provided in the driven wheel support plate 560 in the above embodiment. This is the same as the traveling transmission case side support plate 550.

  When the operator performs tread adjustment of the second crawler traveling device 2500 on the left side of the seedling transplanter 1 and the second crawler traveling device on the right side (not shown) of the seedling transplanter 1, the front pipe member 2551 and the rear side are configured. The pipe member 2552, the front slide shaft 361 and the rear slide shaft 362 are fitted and inserted into each other and slid and positioned at a desired position, and then fixed with bolts 2555. Then, the drive wheel 510 is fixed to the output shaft 62 protruding from the outer opening 2553a of the central pipe member 2553 with bolts (not shown). Thereby, the position adjustment of the crawler 540 in the left-right direction can be performed. Further, even if the position adjustment in the left-right direction is performed, the driving force from the output shaft 62 to the crawler 540 can be accurately transmitted. It should be noted that tread adjustment is appropriately performed for the left and right driven front wheels 2 as well.

  Further, in the configuration shown in FIG. 20, an oil supply port 90 for supplying lubricating oil is provided on the upper end surface of the second traveling transmission case 360, and an oil supply cap 91 is detachably provided in the oil supply port 90. It has been. Further, an oil discharge port 92 for discharging the lubricating oil to a position on the front end surface of the second traveling transmission case 360 that moves up and down in the rotation range of the second traveling transmission case 360 in a normal planting operation. An oil drain cap 93 is detachably provided at the oil drain port 92. Accordingly, whether or not the oil discharge port 92 is filled with the oil level of the lubricating oil up to the oil discharge port 92 in the normal work posture (the rotation range of the second traveling transmission case 360 in the normal planting work). That is, it can be used as an oil level confirmation hole (oil inspection port) for confirming whether or not the oil level is in an appropriate state. When the lubricating oil in the second traveling transmission case 360 is discharged from the oil discharge port 92, the second traveling transmission case 360 is set to the most moved position (a state where the traveling vehicle body 15 is lowered most) in the rotation range, In the second traveling transmission case 360, the oil discharge port 92 is placed in the lower position. If necessary, the connection of the connecting rod 9a and the second traveling transmission case 360 (swing arm 63a) is removed, and the operator lifts the second traveling transmission case 360, etc. The oil discharge port 92 may be located in the lower part.

  Next, when the operator pushes down the steering handle 8 and lifts the driven front wheel 2 and the traveling transmission case 60 by using FIGS. 21 to 22, the steering handle 1 is lifted up. A configuration capable of reducing the force required to push down 8 will be described.

  FIG. 21 is a schematic left side view of third crawler traveling device 3500 of the present embodiment. FIG. 22 is a schematic left side view showing a state of the third crawler traveling device 3500 when the seedling transplanter 1 including the third crawler traveling device 3500 of FIG. 21 is lifted up to the maximum height.

  In the present embodiment, the same components as those in the crawler traveling device 500 described with reference to FIG. 19 are denoted by the same reference numerals, description thereof is omitted, and differences will be mainly described.

  That is, the third crawler traveling device 3500 shown in FIG. 21 can be rotated with respect to the driven wheel support plate 560 within a predetermined range necessary for exceeding the dead point described later, with the rotation fulcrum 563 as the center. A spring stay 564 is attached.

  Further, the third crawler traveling device 3500 shown in FIG. 21 is provided with a dead center extending tension spring 590 having one end 591 connected to the spring stay 564 and the other end 592 connected to the idler wheel support plate 570. Yes.

  When the operator lifts the seedling transplanter 1 up to the maximum height, one end 591 and the other end 592 of the dead-spring tension spring 590 are provided with the support pin 571 as shown in FIG. At the same time that the dead center is exceeded with respect to the shaft core of the spring stay 564, the rotation fulcrum 563 of the spring stay 564 is connected to a position that exceeds the dead center.

  Thereby, when an operator lifts up the seedling transplanter 1 to the maximum height (see FIG. 22), the force necessary to push down the steering handle 8 can be reduced.

  In the configuration shown in FIGS. 21 and 22, the case where the spring stay 564 also exceeds the dead center with respect to the rotation fulcrum 563 has been described. However, the present invention is not limited to this. The one end 591 of the spring 590 may be directly connected to the driven wheel support plate 560. Even in this case, when the operator lifts the seedling transplanter 1 up to the maximum height, the operator assists the depression of the steering handle 8.

  Further, in the configuration shown in FIGS. 19 to 22, the traveling transmission case 60 is rotatable about the input shaft 61 and the drive shaft 510 of the crawler traveling device is attached to the output shaft 62. Although described above, the present invention is not limited to this. For example, the input shaft 61 may include an input / output shaft that also serves as the output shaft 62. That is, in this case, the crawler traveling device is rotatable about the input / output shaft, and the drive wheels of the crawler traveling device are attached to the input / output shaft.

  In addition, the 1st idler wheel 531 and the 2nd idler wheel 532 of this Embodiment are examples of the roller of this invention. Further, the output shaft 62 of the present embodiment corresponds to an example of the axis of the drive wheel of the present invention. The driven wheel support plate 560 of the present embodiment is an example of the first member of the present invention, and the idle wheel support plate 570 of the present embodiment is an example of the second member of the present invention. Further, the dead-center surpassing tension spring 590 of the present embodiment is an example of the tension spring of the present invention. Further, the axis of the support pin 571 of the present embodiment is an example of the swing fulcrum of the present invention.

  In addition, although the said embodiment demonstrated the case where the one driven wheel shaft 521 was provided, it does not restrict to this, For example, by providing two or more driven wheel shafts, two or more driven wheels are provided. The structure may be different.

  In the above embodiment, the case where the first idler wheel shaft 531a and the second idler wheel shaft 532a are provided has been described. However, the present invention is not limited to this. For example, by providing three or more idler wheel shafts, The structure which provided three or more rings may be sufficient.

  Further, in the above embodiment, the driven wheel support plate 560 is connected and fixed to the traveling transmission case side support plate 550 through the elongated hole 561, and the idler wheel support plate is further connected to the driven wheel support plate 560. The configuration in which the 570 is rotatably connected via the support pin 571 has been described. However, the configuration is not limited thereto, and for example, the traveling transmission case has a shape that extends rearward and the rear end of the traveling transmission case. The drive wheel of the crawler traveling device is attached to the output shaft provided in the section, and a plurality of idler wheels are supported by another idler wheel support plate that is rotatably connected around the output shaft. A configuration in which a crawler is wound around the drive wheels and the plurality of idler wheels may be employed.

  Further, for example, in the fourth crawler traveling device 4500 shown in FIG. 23, the support pins 571 of the first idler wheel 531 and the second idler wheel 532 are attached to the swing frame 810 to swing. The frame 810 forms a link structure with a rod 820 whose tip is rotatably connected to a lower end portion 15a (see FIG. 19) of the traveling vehicle body 15 and a crawler frame 830 whose tip is fixed to the traveling transmission case 60. You may do it. By forming the link structure, the first idler wheel 531 and the second idler wheel 532 are supported in accordance with the vertical rotation of the crawler frame 830 accompanying the rotation of the traveling transmission case 60 around the input shaft 61. The position of the pin 571 can be changed.

  FIG. 23 is a schematic left side view illustrating the configuration of the fourth crawler traveling device 4500.

  Furthermore, as shown in FIG. 23, the distance La between the first fulcrum points of the first rotation fulcrum 830a of the crawler frame 830 on the swing frame 810 side and the second rotation fulcrum 820a of the rod 820 on the swing frame 810 side. Is narrower than the distance Lb between the second fulcrum points of the axis of the input shaft 61, that is, the third rotation fulcrum 830 b of the crawler frame 830 and the fourth rotation fulcrum 820 b of the rod 820 on the lower end 15 a side of the traveling vehicle body 15. It may be configured. As a result, when the seedling transplanter 1 is lifted up, the positions of the support pins 571 of the first and second freewheels 531 and 532 move rearward, so that there is little change in the front and rear wheel balance.

  For example, in the fifth crawler traveling device 5500 shown in FIG. 24A, the second driven wheel support plate 1560 to which the driven wheel 520 is rotatably attached, and the first embodiment are not limited to the above embodiment. A configuration using a rack and a pinion gear may be used to attach the idler wheel 531 and the second idler wheel 532 to the second idler wheel support plate 1570 rotatably attached.

  FIG. 24A is a schematic left side view showing the configuration of the fifth crawler traveling device 5500, and FIG. 24B is an explanatory diagram for explaining the mathematical formula. Note that α in FIGS. 24A and 24B is the center position in the front-rear direction of the rotation center of the drive wheel 510 and the crawler grounding surface 540a with reference to the horizontal line 512 passing through the rotation center of the drive wheel 510. It is an angle between the auxiliary line 513 and the central ground point 540a1. Further, the point O in FIG. 24B corresponds to the rotation center of the driving wheel 510, and the point Pα is a central ground point 540a1 in a state where the fifth crawler traveling device 5500 is not lifted up by the angle θ. Correspond. Further, the point Pθ corresponds to the center contact point 540a1 when the fifth crawler traveling device 5500 is lifted up by the angle θ. The distance between the O point and the Pα point is L, and the distance between the O point and the Pθ point is L.

That is, as shown in FIG. 24A, a rack portion 1565 is formed at the lower end edge portion of the second driven wheel support plate 1560, and the upper end edge portion of the second idler wheel support plate 1570 is formed. A pinion gear portion 1575 is formed at a position where it meshes with the rack portion 1565. The gear teeth of the pinion gear portion 1575 are arranged on an arc having a radius R centering on a second support pin 1571 standing on the second idler wheel support plate 1570. In addition, a support plate 1566 having a long hole 1566a for movably supporting the second idler wheel support plate 1570 is fixed to the rack portion 1565 of the second driven wheel support plate 1560.
A second support pin 1571 is slidably inserted into the long hole 1566a, and a drop prevention pin (not shown) is attached to the tip.

  Further, the radius R of the gear tooth tip of the pinion gear portion 1575 is determined by the amount of front-rear shift of the center grounding point 540a1 in the front-rear direction of the crawler grounding surface 540a when the second driven wheel support plate 1560 is lifted up. The front-rear correction amount when the wheel 531 and the second idler wheel 532 are rotated is set to be the same.

  In other words, according to this configuration, when the second driven wheel support plate 1560 is lifted up, the meshing portion between the rack portion 1565 and the pinion gear portion 1575 moves rearward, so that the first idler wheel 531 and the second idler wheel 531 move. The wheel 532 moves backward. Since the rearward movement amount (correction amount L2) and the forward movement amount (deviation amount L1) of the center contact point 540a1 of the crawler contact surface 540a coincide with each other, the second driven wheel support plate 1560 is lifted. Even if it is increased, the position of the center grounding point 540a1 of the crawler grounding surface 540a does not change.

  Here, with reference to FIG. 24 (b), how to set the radius R of the gear tip of the pinion gear portion 1575 will be described using mathematical expressions.

  When the fifth crawler traveling device 5500 is lifted up by an angle θ, that is, when the second driven wheel support plate 1560 is lifted up by an angle θ, the shift amount of the central ground contact point 540a1 in the front-rear direction of the crawler ground contact surface 540a L1 (see FIG. 24B) is expressed by the following equation (1).

L1 = Lcos α−L cos (α + θ) (Equation 1)
On the other hand, the correction amount L2 due to the rearward movement of the meshing portion of the rack portion 1565 and the pinion gear portion 1575 is expressed by the following equation (2).

L2≈2πRθ / 360 (Equation 2)
Here, if the following equation (3) holds, the shift amount of the center grounding point 540a1 becomes small or becomes zero.

L1 = L2 (Equation 3)
Therefore, the following expression (4) is obtained based on (Expression 1) to (Expression 3).

Lcos α−L cos (α + θ) = 2πRθ / 360 (Formula 4)
When (Equation 4) is solved for R, the following equation (5) is obtained.

R = (Lcos α−L cos (α + θ)) 360 / 2πθ (Equation 5)
The radius R can be set by the above (Formula 5).

  In the above embodiment, when the operator performs the tread adjustment of the second crawler traveling device 2500 on the left side and the second crawler traveling device on the right side (not shown) of the seedling transplanter 1 using FIG. The configuration in which the front side pipe member 2551 and the rear side pipe member 2552, the front side slide shaft 361 and the rear side slide shaft 362 are fitted, inserted, slid and positioned at a desired position, and then fixed with bolts 2555 has been described. . Here, in order to facilitate the operation of tightening or loosening the bolt 2555 from the side surface of the second crawler traveling device 2500, the second traveling power transmission case side support plate 2550 is reversed in a side view. The configuration is bent into a shape. Thereby, since the bolt 2555 can be seen from the side, the operation can be easily performed.

  In the above embodiment, the case where the driven wheel 520, the first idler wheel 531 and the second idler wheel 532 (see FIG. 19) have the same configuration as the conventional one has been described. For example, the configuration shown in FIGS. 25A and 25B may be used. FIG. 25A is a perspective view of an improved roller 6500 that can be applied to the crawler traveling device described in the above embodiment, and FIG. 25B shows that the improved roller 6500 is mounted on the crawler traveling device. It is a schematic side view which shows the state made.

  That is, as shown in FIG. 25 (a), the improved type roller 6500 has a circular outer shape, and a circumferential portion of a wheel plate 6510 in which a through hole 6511 for inserting and fixing a rotation shaft is formed at the center. 8 pin members 6512 are erected at an equal interval and retrofitted. As a result, the improved type wheel 6500 can be reduced in weight as compared with the conventional wheel.

  Further, the eight pin members 6512 are configured to reliably fit into the valleys 542 of the mountain-shaped convex portions 541 that are continuously formed on the inner peripheral surface of the crawler 540. In other words, the chevron-shaped convex portion 541 is securely fitted between the adjacent pin members 6512. As a result, when the crawler 540 is rotated by the drive wheel 510 (see FIG. 19), the mountain-shaped convex portion 541 moves in the forward or backward direction, so that the improved roller 6500 is reliably rotated without slipping. To do.

  Moreover, in the said embodiment, although the seedling planting apparatus 300 which rocks the planting tool 11 up and down was mainly demonstrated using FIG. 10, it is not restricted to this, For example, the 2nd seedling planting apparatus 1700 shown in FIG. Thus, as in the case of the seedling planting device 300, the planting tool 11 may be configured to swing up and down and move back and forth.

  Here, FIG. 26 is a left side view showing a schematic configuration of the second seedling planting apparatus 1700. Components having basically the same functions as those described in the above embodiment are given the same reference numerals, and descriptions thereof are omitted.

  That is, as shown in FIG. 26, the second seedling planting apparatus 1700 includes a planting tool 11 and a second vertical movement mechanism 1710 that moves the tip of the planting tool 11 up and down and in the front-rear direction in a stationary locus. (See locus T1 in FIG. 1).

  The second vertical movement mechanism 1710 includes a first cam 1750 that is connected and fixed to the upper link 1720, the lower link 1730, the connecting member 1740, and the vertical movement arm drive shaft 440 (see FIG. 10) from the back side. And a second cam 1760.

  The upper end of the upper link 1720 is rotatably attached to the upper side of the left side surface of the casing 401 (see FIG. 10) that houses the seedling planting device drive mechanism 400 via the upper link rotation shaft 1721. . The front end of the lower link 1730 is freely rotatable to the lower side of the left side surface of the casing 401 (see FIG. 10) housing the seedling planting device drive mechanism 400 via the lower link rotation shaft 1731. Is attached.

  Further, the upper end portion of the connecting member 1740 is rotatably connected to the rear end portion of the upper link 1720 via the upper connecting shaft 1741. Further, a connecting pin 1732 erected at the rear end portion of the lower link 1730 is inserted into the substantially arc-shaped elongated hole 1742 provided at the lower end portion of the connecting member 1740, and slides in a substantially front-rear direction. Connected as possible.

  In FIG. 26, the configuration in which the long hole 1742 is formed on the connecting member 1740 side is described. However, the present invention is not limited to this. For example, the long hole 1742 is formed at the rear end portion of the lower link 1730. In addition, a connection pin 1732 may be erected at the lower end of the connection member 1740.

  Further, the planting tool 11 is fixed to the connecting member 1740.

  Further, an upper roller 1722 is rotatably attached in the middle of the upper link 1720, and the upper roller 1722 is configured to rotate while always in contact with the outer peripheral surface of the second cam 1760. Further, a lower roller 1733 is rotatably attached to the middle of the lower link 1730, and the lower roller 1733 is configured to rotate while always in contact with the outer peripheral surface of the first cam 1750.

  Further, the upper link 1720 and the lower link 1730 are connected by a lower link tension spring 1770 and are configured to be biased toward the side where the interval between the upper link 1720 and the lower link 1730 is narrowed.

  Further, as shown in FIG. 26, a pair of left and right heel members 1780 are attached to the distal ends of the left hopper portion 1011L and the right hopper portion 1011R of the planting tool 11, respectively.

  With the above configuration, by fixing the first cam 1750 and the second cam 1760 having different shapes to the vertical movement arm drive shaft 440, the upper link 1720 and the lower link 1730 can be moved up and down uniaxially.

  Further, by changing the shape of the first cam 1750 or the second cam 1760, the trajectory T1 can be freely changed.

  Further, since the upper link 1720 and the lower link 1730 are forcibly moved up and down by two different cams according to the above configuration, the upper link 1720 and the lower link 1730 can be moved up and down reliably even at high speed planting. I can do it. Moreover, even in the case of high speed planting, torque is not wasted compared to the conventional case.

  Further, by changing the outer shape of the first cam 1750 and the second cam 1760, the distance between the upper link 1720 and the lower link 1730 is changed, and the elongated hole 1742 is slid to move the planting tool 11 back and forth. It can be made.

  Further, by providing the long hole 1742, when an overload is applied during planting work, the long hole 1742 can be slid to escape.

  In addition, since the lower end portion of the connecting member 1740 to which the planting tool 11 is fixed is connected to the lower link 1730 through the long hole 1742 at the start of the movement from the stop position of the planting operation, the lower side There is less impact than when fully connected to the link 1730.

  Moreover, according to the said structure, when the planting tool 11 descend | falls, the planting tool 11 can be shaken back by sliding the long hole 1742. FIG.

  As a result, the basic trajectory (static trajectory) is a circular arc, and if only the descending process is swung later, the lower side of the moving trajectory becomes V-shaped.

  Further, when the planting tool 11 descends, the weight of the planting tool 11 and the lower link 1730 is supported by pulling the lower link tension spring 1770 while making the elongated hole 1742. Assist the ascent of the planting tool 11 and the lower link 1730.

  In addition, since the rod member 1780 is attached to the distal ends of the left hopper portion 1011L and the right hopper portion 1011R, when the rod member 1780 hits the surface of the rod U, the long hole 1742 slides and the planting tool 11 descends. Therefore, the planting depth is constant.

  Further, by making the amount of backward movement of the tip of the hopper through the long hole 1742 the same as the traveling speed at the time of planting work, even if the descending of the planting tool 11 is stopped using the rod member 1780, Do not drag the tip of the hopper that has entered U.

  In the seedling transplanter 1 of the above embodiment, a sensor plate 710 for maintaining a planting depth of the seedling 22 included in the planting depth adjusting mechanism 700 described mainly with reference to FIG. 14 (FIG. 14), a grounding roller (not shown) for detecting the distance the seedling transplanter 1 has actually traveled may be provided. In this case, a pair of left and right support arms that support the rotating shaft of the ground roller at both left and right ends are arranged upward, and the ground roller is prevented from falling too much on the inner side surface of the pair of left and right support arms. Protrusions may be arranged to face each other. These protrusions arranged oppositely contact the upper edge of the arm portion extending in the front-rear direction of the depth arm 720 (see FIG. 14) or the sensor plate 710 from the upper side to prevent the ground roller from falling too much. is there.

  Moreover, it is good also as a structure which waters water on the surface of a grounding roller from the upper direction of the said grounding roller.

  Thereby, even when the multi-film is laid in advance on the heel U, the grounding roller becomes difficult to slide on the surface of the multi-film, and the distance that the seedling transplanter 1 has actually traveled can be reliably detected.

  In the above case, the position where water is applied to the ground roller may be configured to apply water at a high pressure toward the center axis of the ground roller. As a result, mud adhering to the grounding roller can be removed, and the gripping force (hardness to slip) of the grounding roller on the surface of the multi-film can be recovered.

  Further, the portion to which water is applied may be configured to be slightly forward of the center axis of the ground roller. This assists the rotation of the ground roller.

  In addition, a configuration (for outdoor use) in which a plurality of plates curved in an arc shape in a side view is arranged in a water wheel shape at equal intervals on the entire circumferential surface of the cylindrical ground roller. Here, the arc-shaped plate is disposed so that the arc portion is in contact with the flange surface in the forward rotation. As a result, the grounding roller has a shape that covers the soil, and thus rotates more reliably.

  In the above embodiment, the case where the sprocket brake 511 is provided on the drive wheel 510 has been described. However, the present invention is not limited thereto, and for example, a configuration in which the sprocket brake 511 is not provided may be used.

  In the above embodiment, seedlings such as vegetables have been described as transplants. However, the present invention is not limited to vegetables, and any transplants that can be taken out by a take-out device and planted in a field with a planting tool. Also good.

  Moreover, although the said embodiment demonstrated the case where the engine 12 was mounted as an example of a working vehicle and the driving force from the said engine 12 was transmitted to the crawler traveling apparatus 500 etc., it is not restricted to this, For example, an engine is used. Instead, a configuration in which a motor or the like is mounted and the driving force from the motor or the like is used may be used.

  Moreover, although the said embodiment demonstrated the structure provided with the driven front wheel 2 and the crawler traveling apparatus as an example of a working vehicle, it is not restricted to this, For example, the structure which does not include the driven front wheel 2 but travels only with a crawler traveling apparatus. It may be.

  In the above embodiment, as an example of the work vehicle, a configuration has been described in which the driven front wheel 2 as a wheel is provided on the front side of the traveling vehicle body 15, and the crawler traveling device is provided on the rear side of the driven front wheel 2. For example, the wheel may be provided on the rear side of the crawler traveling device, and the crawler traveling device may be provided on the front side of the wheel.

  Further, in the above embodiment, a case has been described in which the front guard 1210F that covers the front V-shaped notch 1200F from the inside and the rear guard 1210B that covers the rear V-shaped notch 1200B from the inside are provided. For example, the front guard that covers the front V-shaped notch 1200F from the outside and the rear guard that covers the rear V-shaped notch 1200B from the outside may be provided. The V-shaped notch may be covered from the outside and the other V-shaped notched may be covered from the inside. Thereby, the volume in the hopper formed by the pair of left and right hopper portions 1011L and 1011R of the planting tool can be secured.

  In the above-described embodiment, a configuration has been described in which both the front V-shaped notch portion 1200F and the rear V-shaped notch portion 1200B are covered with the front guard and the rear guard. The structure which covers any one of the part 1200F or the back V-shaped notch part 1200B may be sufficient.

  Moreover, although the said embodiment demonstrated the case where the substantially V-shaped notch part was provided in the end surface part mutually opposed of the hopper part divided into right and left, it is not restricted to this, For example, The shape of the notch may be any shape such as a substantially U shape, a substantially long hole shape, a substantially rectangular shape, or a substantially rhombus shape.

  Further, in the above-described embodiment, the front end surface portion of the hopper portion divided into two on the left and right sides is notched with both the right hopper portion and the left hopper portion, and In the rear end surface portion of the hopper portion divided into two, the description has been given of the case where the notch portions are formed in both the right hopper portion and the left hopper portion, but not limited thereto, for example, An example of a notch is formed in one of the right hopper and the left hopper at the front end face of the hopper divided into two parts on the left and right sides, and two on the left and right An example of a notch is formed on either the right hopper or the left hopper at the rear end surfaces of the separated hoppers that are abutted against each other. And it may be. Moreover, the structure by which the notch part is not formed in any of the site | parts mutually faced of the right hopper part and the left hopper part may be sufficient.

  In the above-described embodiment, the front and rear end surfaces where the left hopper portion 1011L and the right hopper portion 1011R face each other have a substantially V-shaped front V-shaped notch portion 1200F and a substantially V-shaped shape. Although the configuration in which the rear V-shaped notch portion 1200B is provided has been described, the present invention is not limited to this, and for example, a substantially V-shaped notch portion is provided on one of the front and rear end surfaces. It may be a configuration.

  Moreover, in the said embodiment, although the planting tool demonstrated the case provided with the hopper part divided into right and left, it is not restricted to this, For example, the hopper part into which the planting tool was divided into two front and back The structure provided with may be sufficient.

  Moreover, in the said embodiment, although the taking-out apparatus 200 took out the seedling from the seedling pot 21 of the tray 20, and supplied to the planting tool and planted in the farm field, although it demonstrated, it was not restricted to this For example, an operator puts a seedling into a plurality of pots provided on a rotary table by hand, and the seedling falls by opening and closing a member having a lid function provided on the bottom side of the pot. The present invention can also be applied to a seedling transplanter of a type supplied to a planting tool.

  Moreover, in the said embodiment, the return operation | movement of the tray feed rod 121 is started after the extraction member 260 rushes into the seedling pot 21, and is completed immediately before the extraction member 260 comes out of the seedling pot 21. However, the present invention is not limited to this. For example, the return operation of the tray feed rod 121 is started and completed in any period from when the take-out member 260 enters the inside of the seedling pot 21 until it comes out. All you have to do is

  Moreover, although the said embodiment demonstrated the structure which performs the planting operation | movement of the planting tool 11 intermittently, it is not restricted to this, For example, the structure which plants a seedling between stocks of a fixed space | interval may be sufficient.

  In the above embodiment, seedlings such as vegetables have been described as transplants. However, the present invention is not limited to vegetables, and any transplants that can be taken out by a take-out device and planted in a field with a planting tool. Also good.

  In the above embodiment, the configuration in which the scraper 1510 of the scraper device 1500 is provided behind the second planting tool 2011 has been described. However, the present invention is not limited to this. For example, the scraper 1510 is provided in front of the planting tool. It may be done. The scraper in that case may be configured to enter the inside of the second planting tool 1011 from the front V-shaped notch 1200F of the second planting tool 2011, for example.

  In the above-described embodiment, the scraper device 1500 is attached to the second planting tool 2011 and the scraper cam 1530 disposed so as to be in contact with the scraper arm 1520 is provided. In short, the scraper moves to the front side or the rear side by the operation of the scraper arm together with the planting tool that rises while opening the tip, and scrapes the outer surface of the planting tool. Any configuration may be employed as long as it enters the inside of the attachment and scrapes the inner surface of the planting attachment.

  Further, in the above-described embodiment, the configuration has been described in which the push rod 281 protrudes slightly before the push position 273a1 between the position K3 and the position K4 (see FIG. 9). The rod 281 may be configured to protrude slightly before the push-out position 273a1 between the position K1 and the position K4 (see FIG. 9).

  The transplanting machine according to the present invention has an effect that the strain can be adjusted with a simpler structure than the conventional one, and is useful as a fully-automatic seedling transplanting machine for taking out seedlings from the pot portion of the tray and planting them in the field.

2 Front Wheel 3 Rear Wheel 4 Mission Case 8 Steering Handle 10 Hydraulic Lifting Cylinder 11 Planting Tool 20 Tray 21 Nursery Pot 22 Seedling 25 Presser Frame 60 Traveling Transmission Case 100 Tray Supply Device 110 Seedling Stand 111 Tray Transport Path 155 Guide Rail 200 Take-out Device 300 Seedling planting device 400 Seedling planting device drive mechanism 420 Planting clutch 441 Intermittent cam 460 Restricting arm 460A First arm 460B Second arm 1011L Left hopper portion 1011R Right hopper portion 1012L Left hopper holder 1012R Right hopper holder 1200F Front V-shaped notch 1200B Rear V-shaped notch 1210F Front guard 1210B Rear guard 1400 Driving device 1410 Stopper arm 1420 Tensile spring 1430 Stopper plate 14 40 Solenoid 1450 Compression spring 1460 Back plate

  The present invention relates to a transplanter for seedlings, seed pods and the like, and belongs to the technical field of agricultural machinery.

  Conventionally, an operator manually supplies seed pods and seedling transplants prepared on a mounting table of a transplanter to a plurality of supply cups that are rotated and conveyed in a loop according to the traveling of the transplanter. In addition, there is known a transplanting machine that automatically implants the supplied transplant into a field via a planting tool (see, for example, Patent Document 1).

  Moreover, the said conventional transplanter is the structure which transmits the driving force from an engine to the planting tool side via a planting clutch.

  The above-described inter-plant adjustment mechanism of the transplanter has the following configuration.

  That is, the pin provided on the inter-plant transmission output shaft abuts the planting transmission restriction arm to rotate the planting transmission regulation arm, and the planting transmission regulation groove formed on the outer periphery of the planting clutch and The arrangement is released, the planting clutch shaft is driven, and the planting tool is moved up and down.

  Further, when the outer periphery of the planting clutch makes one rotation, the tip of the planting transmission restricting arm engages with the planting transmission restricting groove of the outer periphery again to stop the driving of the planting clutch shaft. It is configured to stop the vertical movement of the tool.

  In addition, by selecting one of the multiple types of inter-gear shift output gears that rotate integrally with the inter-gear transmission output shaft, the transmission ratio from the inter-gear transmission input shaft is changed to change the rotation speed of the inter-gear transmission output shaft. It is the structure to do.

  In a conventional transplanter, the strain can be adjusted by the above configuration.

JP-A-11-227593

  However, in the inter-plant adjustment mechanism of the conventional seedling transplanting machine described above, the transmission ratio from the inter-shaft transmission input shaft is selected by selecting any one of a plurality of inter-shaft transmission output gears provided on the inter-shaft transmission output shaft. Since it is the structure which changes and changes the rotational speed of the inter-strain transmission output shaft, there existed a subject that a structure became complicated.

  An object of the present invention is to provide a transplanter capable of adjusting strains with a simpler configuration than the conventional one in consideration of the problems of the conventional transplanter.

The traveling vehicle body (15) includes a planting hopper (2011 ) for planting an implant (22) and a planting drive mechanism (400) for intermittently operating the planting hopper (2011). In the transplanter, a planting hopper (2011) for planting the transplant (22) is provided, and the planting hopper (2011) is configured to open and close in the left-right direction while moving up and down, and the planting hopper (2011) A scraper (1510) for scraping the outer surface and the inner surface of the planting hopper (2011) is provided in front of or behind the scraper, and a scraper mounting portion for mounting the scraper (1510) is provided on the lower end side. A scraper arm (1520) connected to a fulcrum shaft (122) positioned above the planting hopper (2011) so as to be pivotable back and forth is provided. The scraper (1510) moves to the front side or the rear side by rotating the scraper arm (1520) together with the planting hopper (2011) that rises while opening the tip, and the scraper (1510) of the planting hopper (2011) The transplanter is configured to scrape the outer surface and then enter the inside of the planting hopper (2011) to scrape the inner surface of the planting hopper (2011) .

Invention of Claim 2 takes out a transplant from the tray supply apparatus (100) which supplies the tray (20) which has two or more seedling pots (21) which accommodated the said transplant (22), and the said seedling pot (21) And a take-out device (200) for supplying to the planting hopper (2011), the take-out device (200) rushes into the floor of the nursery pot (21), takes out the transplant (22) and holds it. And an extruding tool (281) for extruding the implant (22) held by the extractor (260) and supplying the implant (22) to the planting hopper (2011). Then, after the extraction tool (260) has taken out the implant (22), the pusher (281) moves a predetermined distance in the direction of pushing out the implant (22), and the pusher (281) is moved into the implant (22). ) For the planting hopper (20 When supplying to 1), according to claim 1 or 2, characterized in that said pusher (281) is configured to release a further moving implant (22) in a direction to push the implant (22) It is a transplanter.

The first related invention related to the inventions according to the first and second aspects of the present invention is that the planting hopper (2011) for planting the implant (22) and the planting hopper (2011) intermittently. In the transplanting machine provided with the planting drive mechanism (400) to be operated in the traveling vehicle body (15), the planting drive mechanism (400) is configured to switch the transmission to the planting hopper (2011) (420) ), A rotatable cam member (441) provided on the downstream side of transmission of the planting clutch (420), and the planting clutch (420) is turned off based on the shape of the cam member (441). And a driving device (1400) that moves the regulating member (460) to turn the disengagement state of the implant clutch (420) into the engaged state, and the driving device (1400) includes: Regulating member (460 Urging member (1420) for urging the planting clutch (420) in the engaged state, and the restricting member (460) moving in the direction for bringing the front planting clutch (420) into the engaged state. And an actuator (1440) that switches the restriction by the stopper (1430) between an active state and a non-active state. The actuator (1440) is operated to remove the stopper (1430) from the active state. By switching to the operating state, the restriction of the movement of the restricting member (460) in the direction to bring the planting clutch (42) into the engaged state is released, and the planting clutch (420) is changed from the cut state to the engaged state. The transplanter is characterized by having a configuration for shifting .

Further, according to the first and second aspects and the second related invention related to the first related invention, the back plate (1460) for restricting the movement of the stopper (1430) at a predetermined position and guiding it in the moving direction. This is a transplanter characterized in that it is provided .

A third related invention related to the first and second related inventions and the first or second related invention is that the actuator (1440) is disposed between the actuator (1440) and the stopper (1430). The transplanter is provided with an accommodation mechanism (1450) that allows the stopper (1430) to be manually switched from the action state to the action state regardless of the operation .

Further, the fourth related invention related to the first and third related inventions and the first to third related inventions are the drive wheel (510) and the rolling wheels (531, 532) arranged at the front and back on the ground side. And a pair of left and right crawler travel devices (3500) having a crawler (540) and an axis (62) of the drive wheel (510) or an axis of an input shaft (61) for driving the drive wheel (510) (61) and a support member (560, 570, 590) that supports the rollers (531, 532) disposed in the front-rear direction so as to be rotatable up and down, the support members (560, 570, 590). ) Integrally supports the first member (560) disposed so as to be rotatable about the shaft core (61, 62) and the rolling wheels (531, 532) disposed in the front-rear direction. Oscillation fulcrum on the first member (560) 571) and the second member (570) rotatably connected to the first member (560) and the other end connected to the second member (570). In the middle of the support member (560, 570, 590) rotating about the shaft core (61, 62) in the direction in which the airframe lifts up, the tension spring (590) It is a transplant machine characterized by exceeding a dead point about a dynamic fulcrum (571).

More to the invention of claim 1, the scraper (1510), and scraped the inner and outer surfaces of the planting hopper (2011), it is possible to drop the deposited mud and the like.

More to the invention of Claim 2, in addition to the effect of the invention of claim 1, since the pusher of (281) can be brought into contact with the floor of the implant (22), takeoff device (260) and pusher ( 281), the transplant (22) can be stably held, and the planting accuracy can be improved .

In addition to the effects of the first and second aspects of the invention, according to the first related invention, the planting clutch (420) is provided by the cam member (441) provided on the transmission downstream side of the planting clutch (420). The planting drive mechanism (400) can be switched off and the planting clutch (420) can be switched on by operating the driving device (1400) and moving the regulating member (460). This simplifies the configuration.

Moreover, since the on / off of the planting clutch (420) can be switched by operating the actuator (1440) and switching the stopper (1430) to the active state or the non-active state, the drive device (1400) can be downsized. Thus, weight reduction and cost reduction are achieved .

In addition to the effects of the first related invention, the second related invention provides a back plate (1460) that restricts the movement of the stopper (1430) at a predetermined position and guides it in the moving direction. Since (1430) moves accurately between the operating position and the non-operating position, the planting clutch (420) is appropriately turned on and off, and the stopper (1430) can be moved smoothly .

Further, according to the third related invention, in addition to the effects of the first or second related invention , the planting clutch (420) can be turned on at an arbitrary timing, so that the planting position can be manually adjusted, Maintainability is improved.
Further, according to the fourth related invention, in addition to the effects of the first to third related inventions , the tension spring (590) according to the vertical movement position of the front and rear wheels (531, 532) with respect to the drive wheel (510). ) Can be properly exceeded.

Left side view of seedling transplanter of Embodiment 1 of the present invention Plan view of seedling transplanter of Embodiment 1 (A): A schematic cross-sectional view of the center of the planting tool according to the first embodiment cut along a plane parallel to the longitudinal direction of the aircraft and perpendicular to the ground, and viewed from the left side, (b): Planting Schematic sectional view of the center part of the tool cut from a plane parallel to the left-right direction of the machine body and perpendicular to the ground and viewed from the back side, (c): Arranged along the rear surface inside the planting tool Perspective view of rear guard viewed from left rear In the first embodiment, the operation of the extraction member, the operation of the planting tool, and the operation timing of the lateral feed operation of the seedling table of the tray supply device are shown, and the operation of the extraction member, the operation of the planting tool, and the tray supply The figure which shows the operation timing of the vertical feed operation | movement of the tray feed rod of an apparatus (A)-(b): The perspective view of the tray supply apparatus of this Embodiment 1. FIG. Schematic side view showing the configuration of the tray vertical feeding device of the first embodiment (A): Schematic perspective view of the take-out device of the first embodiment, (b): Modification of the extrusion rod shown in FIG. 7 (a) Schematic side view of the take-out device when viewing the lower right front side from the upper left back side of the paper surface of FIG. The schematic diagram which shows the rough correspondence of the position of rotation of the seedling drive arm and the position on the locus | trajectory of the front-end | tip part of a pair of extraction claw in the extraction apparatus of this Embodiment 1. FIG. Left side view of seedling planting device and seedling planting device drive mechanism of Embodiment 1 Schematic left side view of the seedling planting device drive mechanism of the first embodiment (A): Plan view of a driving device and a stopper arm which are a part of the seedling planting device driving mechanism of the first embodiment, (b): Rear view of the driving device and the stopper arm shown in FIG. , (C): Right side view of the driving device and the stopper arm shown in FIG. The top view explaining the various operation levers arrange | positioned in the vicinity of a pair of left and right handle grips of the steering handle of the first embodiment, and the operation unit The left view which shows schematic structure of the planting depth adjustment mechanism of this Embodiment 1. Schematic configuration diagram explaining input and output to the control unit of the first embodiment The schematic side view explaining the scraper apparatus in the seedling transplanting machine of Embodiment 2 of this invention Schematic plan view for explaining the scraper device according to the second embodiment. Schematic side view for explaining the operation of the scraper device in the second embodiment Schematic side view showing the left crawler traveling device, the left traveling transmission case, and the left driven front wheel in the planting work posture of the seedling transplanter according to Embodiment 3 of the present invention. Schematic perspective view of a connecting portion when the left second crawler traveling device is configured to be slidable in the left-right direction with respect to the left second traveling transmission case in the third embodiment. Schematic left side view of the third crawler traveling device of the third embodiment Schematic left side view showing the state of the third crawler traveling device when the seedling transplanter equipped with the third crawler traveling device of FIG. 21 is lifted up to the maximum height Schematic left side view showing the configuration of the fourth crawler traveling device (A): Schematic left side view showing the configuration of the fifth crawler traveling device, (b): explanatory diagram for explaining the formula (A): Perspective view of an improved roller wheel applicable to the crawler traveling device described in the embodiment, (b): Schematic side view showing a state where the improved wheel is mounted on the crawler traveling device. Left side view showing schematic configuration of second seedling planting device

  Hereinafter, a seedling transplanter according to an embodiment of the transplanter of the present invention will be described.

(Embodiment 1)
In Embodiment 1, a seedling transplanter according to an embodiment of the transplanter of the present invention will be described with reference to the drawings.

  FIG. 1 shows a schematic left side view of the seedling transplanter 1 of the present embodiment, and FIG. 2 shows a schematic plan view.

  As shown in FIGS. 1 and 2, a seedling transplanter 1 for transplanting seedlings such as vegetables has a traveling vehicle body 15 including a pair of left and right front wheels 2 and rear wheels 3 as traveling wheels, and a front portion of the traveling vehicle body 15. Seedling planting that swings the planting tool 11 up and down so as to plant the seedling 22 (see FIG. 5), which is arranged behind the traveling vehicle body 15 and the engine 12 and the transmission case (also referred to as main transmission case) 4 arranged in the field. An attaching device 300, a tray supply device 100 for supplying the tray 20 (see FIG. 5) containing the seedlings 22, and a take-out member 260 inside the seedling pot 21 (see FIG. 5) of the tray 20 of the tray supply device 100. The planting depth adjusting mechanism 700 (see FIG. 14) includes a take-out device 200 that takes out the seedlings 22 and supplies them to the planting tool 11 and a sensor plate 710 for keeping the planting depth of the seedlings 22 constant. ) And pressure wheel 3, is configured to include a steering wheel 8, and arranged in the center of the steering wheel 8 operating section 600 or the like.

  In addition, the detailed structure of the extraction apparatus 200 which is one of the characteristics of the seedling transplanter 1 of this Embodiment is later mentioned using FIGS.

  Further, in the seedling transplanter 1 of the present embodiment, as shown in FIGS. 1 and 2, the rotational power output from the engine 12 is branched by the mission case 4 and left and right via a pair of left and right traveling transmission cases 60. It is configured to be transmitted to the pair of rear wheels 3 and also to the planting transmission device 18 provided on the rear side of the mission case 4.

  That is, in the seedling transplanter 1 of the present embodiment, the power from the mission case 4 is transmitted to the planting transmission device 18 to take out the seedling 22 from the seedling pot 21 and plant it in the groin of the field, and the chain belt. While being transmitted to the take-out device 200 through 202, it is transmitted to the planting tool 11 through the seedling planting device drive mechanism 400 attached to the planting transmission device 18 and the seedling planting device 300.

  In addition, the planting operation of the seedling transplanter 1 of the present embodiment is configured to be intermittently performed by the seedling planting device drive mechanism 400.

  The detailed configurations of the seedling planting device drive mechanism 400 and the seedling planting device 300, which are one of the characteristics of the seedling transplanter 1 of the present embodiment, will be described later with reference to FIGS.

  In addition, as shown in FIG. 2, the tray supply device 100 is provided with a tray detection device 1100 for detecting that the tray 20 is not placed on the tray conveyance path 111.

  In the feeding operation of the tray supply device 100 of the seedling transplanter 1 according to the present embodiment, (1) the seedling stand 110 is arranged so that the seedlings in the seedling pot 21 for one row in the horizontal direction of the tray 20 are sequentially taken out by the takeout member 260. However, after the horizontal feeding operation intermittently sent in the horizontal direction and (2) the removal of the seedlings from all the seedling pots 21 for one row in the horizontal direction is completed, the tray 20 on the seedling table 110 is moved to the tray feeding rod. There is a vertical feed operation in which the row of the seedling pots 21 is fed downward by 121 in a downward direction.

  The vertical feed by the tray feed rod 121 is in a state where the tip of the tray feed rod 121 is engaged with the groove between the adjacent seedling pots 21 on the back side of the tray 20, and in this state, the tray feed rod 121 is substantially in a side view. The tray 20 is rotated by drawing a square locus A (see FIG. 6), and the tray 20 is intermittently vertically fed along the tray conveyance path 111.

  Detailed configurations of the tray supply device 100 and the tray detection device 1100 will be described later with reference to FIGS.

  Further, as shown in FIGS. 1 and 2, the seedling transplanter 1 of the first embodiment has a main portion extending to the right side at the rear part of the left and right frames 16 arranged in the left and right direction at the rear end of the mission case 4. A frame 17 is provided. A steering handle 8 extending rearward from the left and right ends is provided at the rear end of the main frame 17, and the steering handle 8 is supported by the transmission case 4 via the main frame 17 and the left and right frames 16. Yes.

  Thus, the operator can perform a steering operation of the traveling vehicle body 15 with the steering handle 8 while walking behind the traveling vehicle body 15.

  That is, the seedling transplanter 1 according to the present embodiment is accommodated in the tray 20 while the traveling vehicle body 15 is advanced with the pair of left and right front wheels 2 and 2 and the pair of left and right rear wheels 3 and 3 straddling the heel U. It is the structure which can be planted automatically on the upper surface of the ridge U.

  The traveling unit is provided with a body control mechanism 50 that controls the posture and the vehicle height of the traveling vehicle body 15 by moving the pair of left and right rear wheels 3 and 3 up and down relative to the traveling vehicle body 15.

  The airframe control mechanism 50 includes a hydraulic lift cylinder 10 that lifts and lowers the traveling vehicle body 15 by raising and lowering the rear wheel 3 between the traveling transmission case 60 of the pair of left and right rear wheels 3 and the traveling vehicle body 15, and the traveling vehicle body 15. A horizontal hydraulic cylinder 14 to be tilted is provided. When the hydraulic lifting cylinder 10 is extended and contracted, the pair of left and right rear wheels 3 move up and down relative to the traveling vehicle body 15 in the same direction by the same amount. Goes up and down.

  That is, in the seedling transplanter 1 of the present embodiment, as shown in FIGS. 1 and 2, the mission output shaft 4 a for outputting driving force to the pair of left and right rear wheels 3 faces the left and right outer sides of the mission case 4. Projecting. Further, the input shaft 61 of the traveling transmission case 60 is connected to the mission output shaft 4a by spline coupling. Further, swing arms 63a extending in a direction orthogonal to the input shaft 61 are respectively fixed to the upper surface side of the outer periphery of the left and right rotating outer cylinder portions 63 protruding from the traveling transmission case 60 to the mission case 4 side (see FIG. 1, see FIG. The traveling transmission case 60 is connected to the transmission case 4 so as to be rotatable about the input shaft 61 via the left and right rotating outer cylinders 63.

  The rod connecting plate 9 is attached to the tip of the piston rod of the hydraulic lifting cylinder 10, and the left and right ends of the rod connecting plate 9 and the left and right swing arms 63a are connected via the connecting rod 9a. ing.

  A horizontal hydraulic cylinder 14 is incorporated between the left connecting rod 9a and the swing arm 63a.

  The hydraulic lift cylinder 10 is fixedly provided to a hydraulic pressure switching valve portion 40 (see FIG. 1) attached to the upper part of the mission case 4 and switches hydraulic pressure to switch the hydraulic pressure from the hydraulic pump attached to the mission case 4. This is a configuration that operates by operating a lifting operation valve (not shown) provided in the valve unit 40.

  Note that a lift operation lever 81 (see FIG. 13), which will be described later, is connected to the lift operation valve via a cable 82, and a counter arm 760 (see FIG. 14), which will be described later, is connected via a rod 765. .

  Further, a pendulum-type left / right tilt sensor 41 is provided on the right side of the mission case 4, and is detected by the left / right tilt sensor 41 through a horizontal operation valve (not shown) provided in the hydraulic pressure switching valve unit 40. The hydraulic cylinder 14 is actuated, and only the left rear wheel 3 is moved up and down to keep the traveling vehicle body 15 horizontal regardless of the unevenness of the troughs of the eaves U.

  Here, the planting tool 11 is demonstrated using Fig.3 (a)-FIG.3 (c).

  3A is a schematic cross-sectional view of the center portion of the planting tool 11 cut from a plane parallel to the longitudinal direction of the machine body and perpendicular to the ground, and viewed from the left side, FIG. FIG. 3 is a schematic cross-sectional view of the center of the planting tool 11 cut from a plane parallel to the left-right direction of the body and perpendicular to the ground, and viewed from the back side. FIG. It is the perspective view which looked at the rear guard 1210B arrange | positioned along the inner rear surface from the left rear.

  As shown in FIGS. 3 (a) and 3 (b), the planting tool 11 includes a pair of left and right left hopper portions 1011L and 1011R, and a left hopper portion 1011L, which temporarily hold seedlings and plant them in a field. The left hopper holder 1012L and the right hopper holder 1012R, which hold the upper end portion of the right hopper portion 1011R and can be separated from each other so as to open and close the front end sides of the left hopper portion 1011L and the right hopper portion 1011R; 1012L and the right hopper holder 1012R are fixed to the holder holding frame 1013 that can pivot about the fulcrum shaft 1013a, and the lower left side of the left hopper holder 1012L and the right hopper holder 1012R. Part 1011L and right hopper part 10 The left and right sides of the hopper tension spring 1014 that constantly urges the compression force in the closing direction of the 1R, and the left and right hopper holders 1012L and 1012R are fixed to the front upper ends of the left and right hopper holders 1012R. A pair of opening / closing arms 1015L and 1015R is provided.

  Here, the connecting portion 1012La of the left hopper holder 1012L and the connecting portion 1012Ra of the right hopper holder 1012R have a gear shape, and the gear shape is shifted by half a tooth at the front and rear, and the gears are assembled by facing the left and right sides. Is configured to mesh. Specifically, when the right opening / closing arm 1015R fixed to the right hopper holder 1012R and connected to the other end 352 of the opening / closing connection cable 350 is pulled by the opening / closing connection cable 350, the right hopper holder 1012R. The connecting portion 1012Ra rotates about the fulcrum shaft 1013a in the direction in which the right hopper portion 1011R opens. At the same time, when the gear meshes with the connecting portion 1012Ra of the right hopper holder 1012R, the connecting portion 1012La of the left hopper holder 1012L rotates in conjunction with each other, so that the left hopper portion 1011L rotates simultaneously.

  Further, the pair of left and right hopper portions 1011L and 1011R have a substantially cylindrical shape in which the lower end portion is pointed like a bowl in the closed state and the upper end portion is opened.

  The front and rear end surfaces where the left hopper portion 1011L and the right hopper portion 1011R face each other have a substantially V-shaped front V-shaped notch portion 1200F in front view and a substantially V-shape in rear view. A rear V-shaped notch 1200B is provided.

  By providing the front V-shaped notch portion 1200F and the rear V-shaped notch portion 1200B, when the planting tool 11 is closed, the contact portion between the mating surfaces of the left hopper portion 1011L and the right hopper portion 1011R becomes small. Noise generated by hitting the mating surfaces can be reduced.

  In addition, the planting tool 11 of the present embodiment includes a front guard 1210F that covers the front V-shaped notch 1200F from the inside and a rear guard 1210B that covers the rear V-shaped notch 1200B from the inside.

  The front guard 1210F has an upper end portion 1210Fa fixed to the front rising portion 1013F of the holder holding frame 1013, and extends obliquely downward toward the inner center of the planting tool 11 from a side view thereof (see FIG. 3A). The flat plate portion is configured to substantially cover the front V-shaped notch portion 1200F in rear view (see FIG. 3B).

Further, the rear guard 1210B has a left upper end 1210BL and a right upper end 1210B on the rear end side of the left frame portion 1013L and the rear end side of the right frame portion 1013R of the holder holding frame 1013.
R is fixed, and in side view (see FIG. 3 (a)), the flat plate portion extending obliquely downward toward the inner center of the planting tool 11 forms the rear V-shaped notch portion 1200B and the front guard 1210F. Similarly, it is generally configured to cover.

  Further, the upper edge 1210BU of the flat plate portion of the rear guard 1210B (see FIG. 3C) is fixed to the holder holding frame 1013, and the rear upper edge 1011BU of the pair of left and right hoppers (FIG. 3 ( It is configured so as to be the same height as the reference a). That is, the upper end edge portion 1210BU of the rear guard 1210B is configured to be lower than the heights of the left and right upper end portions 1210BL and 1210BR of the rear guard 1210B in the rear view.

  The front guard 1210F and the rear guard 1210B are elastic or resin plate members.

  By providing the front guard 1210F and the rear guard 1210B, when the take-out device 200 supplies the seedling 22 to the planting tool 11, the seedling 22 is planted from the front V-shaped notch 1200F or the rear V-shaped notch 1200B. It is possible to prevent the seedling 22 from being dropped out of the attachment 11 or caught in the front V-shaped notch 1200F or the rear V-shaped notch 1200B, and the transplanting accuracy of the seedling is improved.

In addition, the upper edge portion 1210BU of the rear guard 1210B has the same height as the rear upper edge portion 1011BU (see FIG. 3A) of the pair of left and right hopper portions or lower than the upper edge portion. The height of 1210BU is the rear left and right upper ends 1210B of the rear guard 1210B in the rear view.
L, when configured to be lower than the height of 1210BR, when the take-out device 200 supplies the seedling 22 to the planting tool 11, a part of the seedling 22 is the upper edge 1210B of the rear guard 1210B.
Contact with U can be prevented, and the seedling 22 can be accurately fed into the hopper without damaging the seedling 22.

  Next, the operation timing of the extraction member 260, the planting tool 11, the tray supply device 100, and the tray feed rod 121 described above will be described mainly with reference to FIG.

  FIG. 4 shows the operation timing of the extraction member 260, the operation of the planting tool 11, and the operation timing of the transverse feed operation of the seedling table 110 of the tray supply device 100, and the operation of the extraction member 260, the operation of the planting tool 11, FIG. 5 is a diagram illustrating the operation timing of the vertical feed operation of the tray feed rod 121 of the tray supply device 100.

  The vertical feed operation is an operation that is executed when the seedling placing stand 110 moves to the extreme left and right end and the seedling 22 of the last seedling pot 21 is extracted.

  The horizontal axis in FIG. 4 is based on the rotation angle of various drive arms from the horizontal direction. For example, in the case of the take-out member 260, the rotation angle of the drive arm 220 (see FIG. 7), the rotation angle of the vertical movement arm 320 (see FIG. 10) in the case of the planting tool 11, the vertical angle by the tray supply device 100. In the case of feeding, the rotation angle of the longitudinal feed drive arm 150 (see FIG. 6) is used as a reference.

  As shown in FIG. 4, according to the operation timing 2210 of the extraction claw, the seedling transplanter 1 of the present embodiment is pulled out while the extraction member 260 holds the seedling 22 from the inside of the breeding pot 21 at the timing P2. Release of the seedling 22 to the planting tool 11 is started before the timing P3, the release of the seedling 22 is terminated at the timing P3, and then the inside of the adjacent seedling pot 21 is entered at the timing P4. After grasping the seedling 22, it is configured to come out of the inside of the seedling pot 21 (see timing P2 in FIG. 4).

  Moreover, as shown in FIG. 4, according to the operation timing 2220 of the planting tool, the seedling transplanter 1 of the present embodiment stops the descending operation of the planting tool 11 at the timing P3 slightly lowered from the top dead center. After that, it is configured to reach the bottom dead center at timing P4.

  Here, at the timing P3 when the planting tool 11 stops the descending operation, the operation of the take-out member 260, the lateral feed operation of the tray supply device 100 (ie, the operation of the seedling table 110) and the vertical feed operation (ie, the tray feed rod). The operation related to the planting operation including the operation 121) is stopped at the same time, so that the planting operation can be performed intermittently and adjustment between the planting stocks is possible. In addition, the stop period of these operation | movements is comprised by the operation part 600 (refer FIG. 13) from 0 second to a predetermined period according to the desired planting stock.

  The configuration for intermittently realizing the planting operation is realized by the planting clutch 420, the intermittent cam 441, the solenoid 1440, and the like in the seedling planting device drive mechanism 400, which will be described later with reference to FIG. To do.

  In addition, as shown in FIG. 4, according to the operation timing 2230 of the lateral feed operation in the seedling table 110 of the tray supply device 100, the seedling transplanter 1 of this embodiment has the takeout member 260 rushing into the seedling pot 21. During the operation, that is, from timing P4 to P2, the horizontal feeding operation for one seedling pot 21 is stopped, and at the timing P3 when the planting operation of the planting tool 11 is stopped, the seedling is raised. In the middle of the horizontal feeding operation for one pot 21, the horizontal feeding operation is also stopped at the same time.

  Further, as shown in FIG. 4, according to the operation timing 2240 of the vertical feed operation in the tray feed rod 121 of the tray supply device 100, the seedling transplanter 1 of the present embodiment is configured so that the tray feed rod 121 is seen from the side. The tip of the tray feed rod 121 is pulled out from the gap 21a (see FIG. 6) between the adjacent seedling pots 21 on the back side of the tray 20 in the rotation operation while drawing a substantially rectangular locus A (see FIG. 6). (See arrow 121a1 in FIG. 6), move upward (see arrow 121a2 in FIG. 6), and again enter the gap 21b (see FIG. 6) between the next seedling pots 21 (see arrow 121a3 in FIG. 6). The return operation up to is started after the takeout member 260 enters the inside of the seedling pot 21 and the takeout member 260 comes out of the inside of the seedling pot 21 (timing in FIG. 4). 2 reference) was just completed, starts the longitudinal feed operation at timing P2, is completed constitutes the longitudinal feed operation at timing P3.

  In FIG. 4, for the purpose of facilitating understanding, the tray feed rod 121 is moved into the seedling pot by the operation timing 2250 with the same content as the operation timing 2240 of the vertical feed operation in the tray feed rod 121 of the tray supply device 100 described above. It is shown from the viewpoint of whether it is in the groove part between 21 or has come out.

  With the above configuration, during the return operation of the tray feed rod 121 (see timings P1 to P2 in FIG. 4), since the takeout member 260 has rushed into the seedling pot 21, the tray 20 is pressed by the takeout member 260. Therefore, the tray 20 can be prevented from shifting downward on the tray conveyance path 111.

  In addition, with the above configuration, when the planting operation of the planting tool 11 is stopped by intermittent planting, the vertical feed operation of the tray 20 by the tray feed rod 121 is completed (see timing P3 in FIG. 4). The tray feed rod 121 can reliably hold the tray 20 in a stopped state in intermittent planting, and the tray 20 can be prevented from shifting downward on the tray conveyance path 111.

  That is, in the intermittent planting stop state, as described above, the members related to the planting operation stop simultaneously, so that the tray 20 is likely to be displaced due to vibration or the like due to traveling of the airframe, but in this embodiment, the tray 20 The vertical feed operation of the tray 20 by the feed rod 121 has been completed, and the tray feed rod 121 is stopped while remaining in the gap 21a (see FIG. 6) between the adjacent seedling pots 21, The tray feed rod 121 can reliably hold the tray 20.

  In addition, with the above configuration, while the take-out member 260 enters the inside of the seedling pot 21, the tray transport path moving device 170 does not perform the lateral feeding operation of the seedling table 110 of the tray supply device 100, and is intermittent. When the planting operation of the planting tool 11 is stopped by the planting operation (see timing P3 in FIG. 4), one seedling pot 21 of the seedling table 110 of the tray supply device 100 by the tray transport path moving device 170 is used. Since it is in the middle of the horizontal feed operation, the horizontal feed for one seedling pot 21 of the tray 20 can be operated slowly and with sufficient margin at a timing that does not hinder the seedling extraction operation, and the accuracy of the horizontal feed can be improved. improves.

  Further, in the present embodiment, while the tray feed rod 121 is performing the return operation, the tray transport path moving device 170 does not perform the lateral feed operation of the seedling table 110 of the tray supply device 100. This is because, while the tray feed rod 121 is returning to move the next horizontal row of seedling pots 21 downward, the horizontal feed operation (in this case, the seedling table 110 moves to the extreme end). Therefore, if the holding of the tray 20 is not stable while the tray feeding rod 121 is returning, the lateral feeding operation will be performed. This is because the tray 20 may be displaced by the lateral feed operation of the tray supply device 100 by the tray transport path moving device 170. Thereby, in this Embodiment, it can prevent that the tray 20 slip | deviates by the horizontal feed operation | movement of the tray supply apparatus 100 by the tray conveyance path moving apparatus 170. FIG.

  Moreover, according to the seedling transplanting machine 1 of the present embodiment, the tray 20 can be realized with a stable vertical feed that is not easily displaced, and a tray supply device 100 including a vertical feed mechanism different from the conventional one can be provided. The degree of freedom of design increases.

  Next, the tray supply apparatus 100 described above will be further described mainly with reference to FIGS. 5 (a), 5 (b), and 6. FIG.

FIG. 5A is a perspective view of the tray supply device 100, and FIG. 5B is a cross-sectional view of FIG.
It is an expansion perspective view of a part. FIG. 6 is a schematic side view illustrating the configuration of the tray vertical feeding device 120 of the tray supply device 100.

  The tray 20 is formed by connecting a plurality of seedling pots 21 vertically and horizontally, is formed of plastic, and is configured to retain flexibility. Each seedling pot 21 is connected on the front surface side, and the back surface is in an independent form.

  The tray supply device 100 includes a seedling table 110 having a tray conveyance path 111 inclined downward to support the bottom of the tray 20, and a tray vertical feeding device that intermittently feeds the tray 20 in the vertical direction along the tray conveyance path 111. 120 and a tray transport path moving device 170 (see FIG. 2) for moving the seedling table 110 having the tray transport path 111 in the left-right direction.

  In addition, as described above, the tray supply device 100 is provided with the tray detection device 1100 for detecting that the tray 20 is not placed on the tray conveyance path 111.

  Here, the configuration and operation of the tray detection apparatus 1100, which is one of the characteristics of the seedling transplanter 1 of the present embodiment, will be described with reference to FIGS.

  That is, as shown in FIGS. 2 and 5, the tray detection device 1100 is provided on a tray detection member 1110 that is pivotally disposed in a substantially central portion of the tray conveyance path 111 and on the left and right outer surfaces of the seedling table 110, respectively. A pair of left and right interlocking arms 1120L and 1120R that are arranged and rotate in conjunction with the rotation of the tray detection member 1110, a connecting shaft 1130 that connects the tray detection member 1110 and the pair of left and right interlocking arms 1120L and 1120R, and a tray A pair of left and right limiter switches 1140L and 1140R are provided on the inner surfaces of the left and right side portions 172L and 172R of the transport path moving device 170, respectively, at positions corresponding to the pair of left and right interlocking arms 1120L and 1120R. Signal lines (not shown) of the pair of left and right limiter switches 1140L and 114R are connected to the control unit 800 (see FIG. 15).

  When the tray 20 is not supplied on the tray conveyance path 111 or when the rear end portion of the tray 20 passes the position of the tray detection member 1110, the tray detection member 1110 is a spring member (not shown). Is omitted toward the front side from the substantially central portion of the tray conveyance path 111, but when the tray 20 is supplied onto the tray conveyance path 111, the back surface of the tray 20 is attached to the spring member. Since the tray detection member 1110 is pressed by a force that opposes the restoring force, the tray detection member 1110 rotates counterclockwise when viewed from the left side.

  As a result, the tray detection member 1110 rotates clockwise or counterclockwise in accordance with the presence or absence of the tray 20, and the pair of left and right interlocking arms 1120L and 1120R rotate in conjunction therewith.

  In a state where the tray 20 does not exist in the central portion on the tray conveyance path 111, the tray detection member 1110 rotates clockwise as viewed from the left side and faces from the opening at the substantially central portion of the tray conveyance path 111 to the front side. At the same time, the pair of left and right interlocking arms 1120L and 1120R rotate clockwise in conjunction with this and stop at a predetermined position. When the seedling table 110 is laterally fed and reaches the inner surface of either of the left and right side portions 172L and 172R of the tray transport path moving device 170, the pair of left and right interlocking arms 1120L or 1120R is moved to the pair of left and right limiter switches 1140L. Alternatively, a signal indicating that the tray 20 does not exist at a substantially central portion on the tray conveyance path 111 is sent to the control unit 800 when it hits the movable portion 1141L or 1141R of 1140R. Receiving the signal, the control unit 800 sounds an alarm buzzer (not shown) arranged in the operation unit 600 (see FIG. 13).

  The alarm buzzer is configured to sound for a certain time (several seconds) after the movable part 1141L or 1141R of the pair of left and right limiter switches 1140L or 1140R is pressed, and then the alarm sound of the alarm buzzer automatically stops.

  In addition, the certain time is set to be equal to or longer than the time when the seedling table 110 moves from end to end, and each time the movable unit 1141L or 1141R of the pair of left and right limiter switches 1140L or 1140R is pressed, the certain time is counted. Is reset, a signal from the newly pressed limiter switch 1140L or 1140R is received, and the count for a predetermined time is newly started, so that the alarm sound is stopped until the tray 20 is supplied. It can be set as the structure which rings continuously without.

  As described above, the pair of left and right limiter switches 1140L and 1140R are attached to the left and right side portions 172L and 172R of the tray transport path moving device 170, which is a fixed portion that does not move to the left and right. The signal wiring (not shown) extending from can be securely fixed, and disconnection can be prevented.

  Further, since the alarm buzzer automatically stops when a warning sound is generated for a certain time, it is not necessary to provide a stop switch.

  In the above embodiment, the configuration in which the alarm buzzer sounds for a certain period of time has been described. However, the configuration is not limited thereto. For example, when the tray detection device 1100 detects the absence of the tray 20, the horizontal row of the tray 20 is linked with the solenoid 1440. For example, the alarm buzzer may sound 10 times according to the number of the seedling pots 21 arranged in the above.

  In the above embodiment, the configuration in which the alarm buzzer sounds for a certain period of time has been described. However, the present invention is not limited to this. For example, when the tray detection device 1100 detects the absence of the tray 20 twice in succession, it continues for several seconds. The alarm buzzer may sound or the alarm buzzer may sound longer in conjunction with the solenoid 1440 every time the absence of the tray 20 is detected.

  According to the said structure, since the residual amount of a seedling is known by the sound of an alarm buzzer, the tray 20 can be replaced with a margin.

  Moreover, according to the said structure, there exists an effect that it can judge a seedling reduction degree and a seedling residual amount degree by an alarm operating whenever the intermittent planting operation | movement linked with the action | operation of the solenoid 1440 is carried out.

  Here, the description returns to the tray vertical feeding device 120 of the tray supply device 100 again.

  The tray vertical feeding device 120 enters between the seedling pots 21 protruding from the back side of the tray 20 to the back side, and moves downward to feed the tray 20 by one horizontal row of the seedling pot 21, The tray feed rod 121 is configured to move out from between the seedling pots 21 and move upward by the horizontal row of the seedling pots 21. The tray feed rod 121 is configured such that a central portion 121a can enter and exit from a retreat groove 111a provided at a lower portion of the tray conveyance path 111, and both end portions 121b are bent at a right angle so as to be outside of both sides of the tray conveyance path 111. The configuration is such that the tray 20 does not get in the way when the tray 20 moves on the tray conveyance path 111.

  Further, the tray supply device 100 includes a pair of left and right rod guide plates 112 for restricting the movement of the tray feed rod 121 on the end surface portions on both sides of the tray conveyance path 111 on the downstream side of the retreat groove 111a. Yes. At the upper end edge of the rod guide plate 112, a notch 112a is formed into which a protrusion 121ab protruding downstream at both ends of the central portion 121a of the tray feed rod 121 can enter (FIG. 5B). reference).

  That is, the notch portion 112a is temporarily formed between the center portion 121a of the tray feed rod 121 until the center portion 121a of the tray feed rod 121 moves downward and then comes out from between the seedling pots 21. The protrusions 121ab at both ends are held and the tray 20 is prevented from moving downward due to the weight of the seedlings 22 placed in the seedling pot 21. The trajectory of the central portion 121a of the tray feed rod 121 will be described later with reference to FIG.

  Further, the tray transport path moving device 170 is provided on the back side of the tray transport path 111 and obtains a driving force from the main body side of the seedling transplanter 1 to move the seedling table 110 having the tray transport path 111 in the left-right direction. A lead cam shaft 171, a guide rail 155 that is provided above the lead cam shaft 171 and guides the movement of the seedling table 110 having the tray conveyance path 111 in the left-right direction, and both left and right side portions 172 </ b> L that hold the guide rail 155 on both the left and right sides , 172R.

  Further, the tray transport path 111 is supported by a lead cam shaft 171 and a guide rail 155 that guides left and right movement provided on the inner upper side of the tray transport path 111. As a result, the guide rail 155 supports the tray conveyance path 111 at a position away from the lead cam shaft 171, so that there is little backlash when moving in the left-right direction.

  When the tray 20 is inserted from above the seedling mount 110 so as to be sandwiched between the tray conveyance path 111 and the presser frame 25, the tip of the tray feed rod 121 is engaged with the groove on the back side of the tray 20. In this state, the tray feed rod 121 rotates while drawing a substantially square locus A in a side view, whereby the tray 20 is intermittently fed vertically downward along the tray conveyance path 111.

  A mechanism for intermittently feeding the tray 20 intermittently using the tray feed rod 121 will be described later.

  Further, in the present embodiment, the tray 20 is sequentially vertically fed along the tray conveyance path 111 and the seedlings 22 are all taken out by the take-out member 260, and then pass below the tray vertical feed device 120 and finally. In this configuration, it passes through the operation unit 600 and is discharged in the direction of the steering handle 8 (see the discharge path 20t in FIG. 1), and this point will be described.

  That is, as shown in FIGS. 1 and 2, the main clutch lever 900 is disposed at the tip of the discharge path 20t through which the tray 20 is discharged. When the main clutch lever 900 is operated forward, the main clutch is “on”. When the operation is performed rearward (see the arrow 900B in FIG. 1), the main clutch enters the “disengaged” state.

  The tray 20 discharged in the direction of the steering handle 8 is normally removed by an operator. However, even if the operator neglects the removal operation of the tray 20 that has been discharged, in this embodiment, the tray 20 is discharged. When the main clutch lever 900 is pushed backward by the leading end of the tray 20 (see arrow 900B in FIG. 1), the planting operation is automatically stopped for safety. is there.

  By the way, the take-out device 200 is arranged at a position facing the lower end of the seedling table 110, and the tip of the take-out member 260 operates so as to draw a trajectory K, and sequentially from the seedling pot 21 that moves in the lateral direction. The seedling 22 is taken out and supplied to the planting tool 11.

  Next, the configuration of the take-out device 200 provided in the seedling transplanter 1 according to the present embodiment will be mainly described with reference to FIGS.

  Fig.7 (a) is a schematic perspective view of the taking-out apparatus 200, FIG.7 (b) is a modification of the extrusion rod 281 shown to Fig.7 (a). FIG. 8 is a schematic side view of the take-out device 200 as seen from the upper left back side of the paper surface of FIG.

  As shown in FIGS. 7A and 8, the take-out device 200 is rotatably held by an take-out device fixing member 201 fixed to the main body of the seedling transplanter 1, and is attached to the main body side via a chain belt 202. A drive arm 220 that rotates in the same direction by a drive shaft 203 that rotates in the direction of arrow B with the power of the drive source, and a connecting arm in which one end portion 230a is rotatably connected to the distal end side portion 220a of the drive arm 220. 230, a plate-like member held by the take-out device fixing member 201 by fixing pins 201a and 201b, and having an outer shape of a letter J, and the side closer to the tray supply device 100 is straight and the far side is And a guide portion 240 having a guide groove 241 that has a shape that rises in a substantially R shape.

  Further, the take-out device 200 includes a first guided member 245 that is integrated with a cam shaft 271 to be described later and inserted into the guide groove 241 so as to be smoothly slidable without shaking. The substrate 250 is connected to the member 247, protrudes from one end of the side surface to which the guided members are connected, and is bent at a substantially right angle, and the substrate 250 protrudes perpendicularly from the bent portion 251 of the substrate 250. A pair of left and right extraction claw holding pins 252L and 252R, which are movably held, and a root portion are attached to a pair of left and right extraction claw holding pins 252L and 252R, respectively, and the width of the tip portion is narrowed into a tweezers. 21 and a pair of extraction claws 261L, 261R for taking out the seedling 22 in the 21 and a base portion side of the inner surface portion of the pair of extraction claws 261L, 261R facing each other. A take-out member 260 and a spring 263 pulling the opposite ends is mounted, and a.

  Further, the take-out device 200 is a cam 270 having a cam shaft 271 integrated with the first guided member 254, which is pivotably penetrated through the substrate 250, and is related to the thickness of the outer peripheral portion of the cam 270. The outer peripheral portion 272 whose thickness varies depending on the location of the outer peripheral portion when contacting the front end surfaces of the pair of left and right claw tip width regulating projections 262L, 262R provided on the inner surface portions of the pair of extraction claws 261L, 261R. And an outermost edge portion 273 whose outer diameter changes depending on the position of the outermost edge portion with respect to a distance (also referred to as an outer diameter) of the outermost edge portion of the cam 270 from the axis center of the cam shaft 271. The cam 270 is pivotally connected to the substrate 250, and is removed from the seedling pot 21 along the pair of take-out claws 261L and 261R by a change in the outer diameter of the outermost edge 273 of the cam 270. Take-out pawl 261L, it is provided with a pushing mechanism 280 having a push rod 281 for pushing the seedlings 22 held by 261R, a.

  One of the features of the take-out device 200 according to the present embodiment is that after the take-out member 260 takes out the seedling 22 in the seedling pot 21, the push rod 281 moves slightly in the direction of pushing the seedling 22, and then the push rod 281. When the seedling 22 is supplied to the planting tool 11, the push rod 281 is configured to further move in the direction of pushing out the seedling 22. Thereby, since the extrusion rod 281 can be made to contact the floor part of the seedling 22, the seedling 22 can be stably hold | maintained with the extraction member 260 and the extrusion rod 281, and the improvement of planting precision can be aimed at.

  This configuration will be further described later with reference to FIGS.

  The take-out member 260 of the present embodiment is an example of the take-out tool of the present invention, and the push rod 281 of the present embodiment is an example of the push-out tool of the present invention.

  Further, the edge portion 245 a near the tip of the first guided member 245 that is integral with the cam shaft 271 is rotatably connected to the other end 230 b of the connecting arm 230. The first guided member 245 that is integral with the camshaft 271 passes through a transmission mechanism 290 including a first gear 291, a second gear 292, and a third gear 293 by the rotational force of the drive arm 220. The driving force is transmitted to the cam shaft 271 in accordance with the driving cycle of the driving arm 220 by being rotated.

  Further, when the outer peripheral portion 272 of the cam 270 comes into contact with the front end surfaces of the pair of left and right claw tip width regulating protrusions 262L and 262R provided on the inner surface side of the pair of extraction claws 261L and 261R, the outer peripheral portion 272 of the cam 270 The pair of extraction claws 261L and 261R is opened and closed by the interaction between the change in thickness and the restoring force of the tension spring 263.

  Next, the transmission mechanism 290 will be further described.

  That is, the first gear 291 is fixed to the distal end side portion 220a of the drive arm 220, and is rotatably attached to the connection arm 230 via the first rotation shaft 291a. Further, the third gear 293 is fixed to the tip end portion 245 b of the first guided member 245 that is integral with the cam shaft 271, and the edge portion 245 a near the tip end of the first guided member 245 is connected to the connecting arm 230. Therefore, the third gear 293 is rotatably held with respect to the connecting arm 230. Therefore, the third gear 293 rotates integrally with the first guided member 245. The second gear 292 is pivotally attached at the center position of the connecting arm 230, and is sandwiched between both the first gear 291 and the third gear 293, and is engaged with both gears.

  Next, the extrusion mechanism 280 will be further described with reference to FIGS.

  The push-out mechanism 280 pushes out the seedling 22 held by the pair of take-out claws 261L and 261R, and is matched to the width of the front end portion of the take-out claws 261L and 261R on the push-out end surface portion 281S where the front end portion 281a is bent at a right angle. An extrusion rod 281 (see FIG. 7A) in which a notch 281b is formed, and a connecting rod 282 that is bent at a substantially right angle when viewed from the extrusion end surface portion 281S side of the extrusion rod 281, A leading end portion 282a is rotatably inserted into a rear end hole portion 281c provided at the rear end portion of the push rod 281 and is connected to a connecting rod 282 that is held by a detachment preventing pin (not shown) and a connecting rod 282. The other tip portion 282b is fixed to the upper end portion 283a, and the lower end portion 283b is rotatably attached to the substrate 250 by the push arm connecting shaft 283d. The pushing arm 283 provided with the first holding projection 283c, one end hooked to the tension spring holding first projection 283c, and the other end hooked to the tension spring holding second projection 250a fixed to the substrate 250. And an extrusion arm tension spring 284.

  When the cam 270 rotates in the direction of the arrow B, the maximum protrusion 273b having the largest outer diameter portion of the outermost edge portion 273 is the outer peripheral edge portion of the root portion of the first spring spring holding projection 283c. , The push-out arm tension spring 284 is extended, and the push-out arm 283 is swung counterclockwise in FIG. 8 (see arrow C), and the push-out rod 281 connected by the connecting rod 282. Is configured to retreat.

  Further, when the cam 270 is further rotated in the direction of arrow B, the outer diameter of the outermost edge portion 273 is smaller than the largest diameter of the maximum protruding portion 273b, and the outer diameter of the outermost edge portion 273 is the smallest. The contact position 273c1 (see FIG. 8) in the intermediate protrusion 273c having an outer diameter larger than that of the protrusion 273a is configured to contact the outer peripheral edge of the base portion of the first projection 283c for holding the tension spring.

  At this time, the pushing arm tension spring 284 that has been stretched until then slightly contracts, and the pushing arm 283 is swung clockwise in FIG. 8 (see arrow D), and is pushed by the connecting rod 282. The rod 281 protrudes slightly, and the extrusion end surface portion 281 </ b> S is in contact with the seedling 22.

  Further, when the cam 270 further rotates in the direction of the arrow B, the pushing position 273a1 (see FIG. 8) of the smallest protrusion 273a having the smallest outer diameter in the outermost edge 273 becomes the tension spring holding first projection 283c. It is the structure which contacts the outer-periphery edge part of a root part.

  As a result, the push arm tension spring 284 is further contracted, the push arm 283 is swung clockwise in FIG. 8 (see arrow D), and the push rod 281 connected by the connecting rod 282 further protrudes. It is the structure which discharge | releases the seedling 22 completely to the planting tool 11 side.

  Each time the push rod 281 protrudes, the tip of the pair of extraction claws 261L and 261R passes through the notch 281b provided in the tip 281a of the push rod 281. It is a configuration that removes the soil that had been removed.

  Further, as shown in FIG. 7A, the extrusion rod 281 has rising portions 281L and 281R at both left and right ends in the width direction of the central flat portion 281C.

  When the seedlings 22 are taken out from the seedling pot 21 by the rising portions 281L and 281R, the leaves of the seedling 22 can be covered from both sides, so that the seedlings in the adjacent seedling pot 21 can be prevented from being entangled.

  Moreover, since the extrusion rod 281 covers the leaves of the seedling 22 from the lower surface and both side surfaces by the flat portion 281C and the rising portions 281L and 281R at both ends thereof, it can be prevented from being entangled with the pair of extraction claws 261L and 261R.

  In addition, after removing the seedling 22 from the seedling pot 21, the leaves of the seedling 22 are stable up to the position where the seedling 22 is released because the rising portions 281L and 281R are located between the left and right rising portions 281L and 281R. Can be carried.

  Note that the push rod 281 is not limited to the configuration shown in FIG. 7A, and may have the configuration shown in FIG. 7B, for example.

That is, the second push rod 1281 shown in FIG. 7B has second rising parts 1281L, 1281R at the left and right ends in the width direction of the central flat part 281C, as shown in FIG. 7B.
Is formed. The end surface portions 1281La and 1281Ra on the front end side of the second rising portions 1281L and 1281R may be configured to be positioned on the same plane 1280 as the extrusion end surface portion 281S.

  Thus, after the takeout member 260 takes out the seedling 22 in the seedling pot 21, the entire seedling 22 is pushed by the pushing end surface portion 281S and the end surface portions 1281La and 1281Ra on the distal end side of the second rising portions 1281L and 1281R. Since it can take out, the extrusion and discharge | release of the seedling 22 are stabilized.

  Next, the operation of the take-out device 200 in the above configuration will be described with reference to FIGS.

  As described above, the guide portion 240 does not move because it is firmly fixed to the extraction device fixing member 201 fixed to the main body of the seedling transplanter 1.

  As the drive arm 220 rotates, the connecting arm 230 swings. The movement of the connecting arm 230 passes through the guide groove 241 formed in the guide portion 240 and is connected to the substrate 250. Regulated by H.245.

  On the other hand, the substrate 250 also swings along with the movement of the connecting arm 230. In addition to the first guided member 245, the second guided member 247 penetrates the guide groove 241 in the substrate 250. Since the second guided member 247 is not connected to the connecting arm 230, the movement repeats reciprocating movement along the guide groove 241. Since the extraction member 260 is attached to the substrate 250, the extraction member 260 also moves in the same manner as the substrate 250, and the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R are shown in FIGS. Draw a trajectory K.

Here, FIG. 9 shows the rotation position of the drive arm 220 and the pair of extraction claws 261L and 261R.
It is a schematic diagram which shows a rough correspondence with the position on the locus | trajectory K of the front-end | tip parts 261Lp and 261Rp. The rotation positions P1 to P6 of the drive arm 220 shown in FIG. 9 correspond to the positions K1 to K6 on the locus K of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R. In addition, the arrow described on the broken line which shows the locus | trajectory K has shown the operation | movement direction.

  As shown in FIG. 9, the operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R from the position K1 to the position K2 corresponds to the operation of extracting the seedling 22 from the seedling pot 21. Since the locus K from the position K1 to the position K2 is linear, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R recede straight from the seedling pot 21. At this time, the force in the direction approaching each other acts on the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R by the restoring force of the tension spring 263, and the seedlings 22 extracted from the seedling pot 21 are held. I can do it. The opening / closing operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R will be described later together with the operation of the push rod 281.

  The movement of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R from the position K6 toward the position K1 is performed with respect to the seedlings 22 in the breeding pot 21 of the tray 20 at the seedling extraction position. 261L, 261R is inserted, and moves in the opposite direction along the path K from the position K1 to the position K2, so that the tips 261Lp, 261Rp of the pair of extraction claws 261L, 261R It is inserted almost straight into the pot 21. At this time, the force in the direction away from each other acts against the restoring force of the tension spring 263 on the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R, and both the tip portions are open. You can enter the seedling pot 21.

  Thus, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R do not damage the tray 20, the seedling pot 21, and the seedling itself.

  The trajectory K from the position K1 to the position K2 and the trajectory K from the position K6 to the position K1 are substantially linear. The side near the tray supply device 100 of the guide groove 241 is linear. It is because it is done.

  Next, as the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R move from the position K2 to the position K3, the pair of extraction claws 261L and 261R have the tip portions 261Lp and 261Rp facing the breeding seed pot 21 until then. When the posture is suddenly changed substantially downward from the posture and moved to the position K4, the tip portions 261Lp and 261Rp are substantially directed downward.

  In addition, while the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R are directed from the position K3 to the position K4, the contact position 273c1 (see FIG. 8) in the intermediate protrusion 273c is the tension spring holding first projection 283c. Contact the outer peripheral edge of the root. Thereby, the extrusion rod 281 is slightly protruded in front of the extrusion position 273a1, and the extrusion end surface portion 281S contacts the seedling 22.

  The reason why the posture is suddenly changed substantially downward as described above is that the side of the guide groove 241 far from the tray supply device 100 is formed in a shape that rises in a substantially R shape.

  At that time, just below the tip portions 261Lp and 261Rp, the seedling insertion port (not shown) of the planting tool 11 in the ascending process on the locus T1 (see FIG. 1) is directed upward toward the top dead center. The push-out position 273a1 (see FIG. 8) is in contact with the outer peripheral edge of the base part of the tension spring holding first protrusion 283c between the position K4 and the position K5.

  Thereby, the extrusion rod 281 is completely protruded, and the seedling 22 extruded from the distal end portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R by the extrusion end surface portion 281S of the extrusion rod 281 is supplied to the planting tool 11. The The operation of the push rod 281 will be further described later.

  Next, from the position K5 toward the position K6, the tip portions 261Lp and 261Rp of the pair of take-out claws 261L and 261R abruptly move so that the posture that has been directed substantially downward until then can be opposed to the next seedling pot 21. The tip portions 261Lp and 261Rp are inserted into the new seedling pot 21 when the position is changed to move to the position K1.

  As can be seen from the approximate correspondence between the rotation position of the drive arm 220 and the position on the locus K of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R shown in FIG. 9, the position K4 to the position K5 Since the movement toward the position K1 is performed more slowly than the movement toward the position K2 from the position K1 described above, the removal of the seedling 22 from the seedling pot 21 can be performed quickly and the release of the seedling 22 to the planting tool 11 is ensured. Can be done.

  Such an operation is performed because the connecting arm 230 is provided in front of the drive arm 220 (the extraction position of the tray supply device 100). Further, since the drive arm 220 is farther from the extraction position of the tray supply device 100 than the connection arm 230, it does not come into contact with the seedling 22 when the seedling 22 is taken out.

  Next, the operation of the transmission mechanism 290 and the extrusion mechanism 280 will be mainly described with reference to FIGS.

As shown in FIG. 7, the first gear 291 fixed to the distal end side portion 220 a of the drive arm 220 by the rotation of the drive arm 220 in the B direction moves in the B direction around the rotation fulcrum 220 b of the drive arm 220. Revolve. The first gear 291 is rotatably attached to the connecting arm 230 via the first rotation shaft 291a, and rotates the third gear 293 in the B direction via the second gear 292. The third gear 293 is fixed to the distal end portion 245 b of the first guided member 245 that is integral with the cam shaft 271, and the edge portion 245 a near the distal end of the first guided member 245 is connected to the connecting arm 230. Since the third gear 293 rotates, the cam 270 rotates in the B direction via the cam shaft 271.
That is, the cam 270 rotates in accordance with the drive cycle of the drive arm 220.

  The cam 270 has an outer peripheral portion 272 whose thickness varies depending on the location, and an outermost edge portion 273 whose distance (outer diameter) from the center of the cam shaft 271 varies depending on the location. As shown, the maximum protrusion 273b in the outermost edge 273 has a larger outer diameter than the minimum protrusion 273a, and the thickness of the first range 272a within the outer periphery 272 that is the same distance from the axial center of the cam shaft 271. Is set thinner than the thickness of the second range 272b which is the remaining thick portion.

  With the above configuration, when the cam 270 rotates in synchronization with the drive cycle of the drive arm 220, the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R move from the position K6 to the position K1. The opening / closing operation of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R and the operation of the push rod 281 are as follows.

  That is, the second range 272b, which is a thick portion of the outer peripheral portion 272 of the cam 270, comes into contact with the tip surfaces of the pair of left and right claw tip width restricting projections 262L and 262R, whereby a pair of extraction claws 261L and 261R The front end portions 261Lp and 261Rp are opposed to the restoring force of the tension spring 263, and force in directions away from each other is acting, and both the front end portions are open.

  On the other hand, at this time, of the outermost edge portion 273 of the cam 270, the maximum projecting portion 273b is in contact with the outer peripheral edge portion of the base portion of the first projection 283c for holding the tension spring, so that the push-out arm tension spring 284 is The extension arm 283 is extended and rotated counterclockwise in FIG. 8 (see arrow C), and the state where the extrusion rod 281 connected by the connection rod 282 is retracted is maintained.

  Therefore, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R can enter the seedling raising pot 21 and take out the seedling.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K1 toward the position K2, and the extrusion The operation of the rod 281 is as follows.

  That is, at the same time when the operation from the position K1 toward the position K2 is started, the first range 272a, which is a thin portion of the outer peripheral portion 272 of the cam 270, is connected to the tip surfaces of the pair of left and right claw tip width regulating projections 262L and 262R. By making contact, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R move toward each other due to the restoring force of the tension spring 263, so that both tip portions are closed.

  On the other hand, at this time, the maximum projecting portion 273b of the outermost edge portion 273 of the cam 270 is still in contact with the outer peripheral edge portion of the root portion of the first projection 283c for holding the tension spring, whereby the push arm tension spring 284 is pushed. 8 is extended, and the push arm 283 maintains the state of rotating counterclockwise in FIG. 8 (see arrow C), and the push rod 281 connected by the connecting rod 282 maintains the retracted state. ing.

  Therefore, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R can hold the extracted seedling 22 firmly at the tip portion and move to the planting tool 11 side as it is.

  The contact position 273c1 (see FIG. 8) of the intermediate protrusion 273c is the position of the first protrusion 283c for holding the tension spring while the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R are moved from the position K3 to the position K4. As described above, the outer peripheral edge portion of the root portion is brought into contact, whereby the push rod 281 is slightly protruded in front of the push position 273a1, and the push end surface portion 281S is brought into contact with the seedling 22.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K4 toward the position K5, and extrusion The operation of the rod 281 is as follows.

  That is, at the same time when the operation from the position K4 to the position K5 is started, the minimum protrusion 273a of the outermost edge 273 of the cam 270 is replaced by the minimum protrusion 273a outside the root of the first protrusion 283c for holding the tension spring. Contact the periphery.

  As a result, the restoring force of the pushing arm tension spring 284 causes the pushing arm 283 to slightly rotate clockwise when the base portion of the first projection 283c for holding the tension spring moves to the contact position 273c1 in front of the pushing position 273a1. Then, when it comes to the extrusion position 273a1, it immediately turns clockwise (see arrow D in FIG. 8).

  That is, the push rod 281 connected by the connecting rod 282 is slightly protruded when the base portion of the first projection 283c for holding the tension spring comes to the contact position 273c1, and then when the push rod 281 comes to the push position 273a1, At the same time as it is completely projected, the cutout portion 281b of the extrusion end surface portion 281S of the extrusion rod 281 moves while expanding the distal end portions of the pair of extraction claws 261L and 261R.

  Thereby, the extrusion rod 281 is once protruded to such an extent that the extrusion end surface portion 281S comes into contact with the seedling 22 and then the seedling 22 is pushed out at the extrusion position 273a1, so that the root pot is not easily broken and the seedling 22 is planted. The timing of release to the tool 11 is also stabilized.

  At this time, the notch 281b of the distal end 281a of the push rod 281 moves while expanding the distal ends of the pair of extraction claws 261L and 261R, so that dirt or the like attached to the distal ends is removed. Removed at the same time.

  Next, the opening / closing operation of the pair of extraction claws 261L, 261R, 261Lp, 261Rp when the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform the operation from the position K5 to the position K6, and extrusion The operation of the rod 281 is as follows.

  That is, in the outer peripheral portion 272 of the cam 270, the second range 272b which is a thick portion instead of the first range 272a which is a thin portion is in contact with the tip surfaces of the pair of left and right claw tip width regulating projections 262L and 262R. By doing so, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R change to a state in which both tip portions are opened due to the force in the direction away from each other against the restoring force of the tension spring 263. To do.

  On the other hand, when coming to the vicinity of the position K6, the maximum protrusion 273b of the outermost edge 273 of the cam 270 contacts the outer peripheral edge of the root of the first protrusion 283c for holding the spring spring instead of the minimum protrusion 273a. As a result, the pushing arm tension spring 284 is extended, the pushing arm 283 is swung counterclockwise in FIG. 8 (see arrow C), and the pushing rod 281 connected by the connecting rod 282 moves backward. It changes to the state.

  In the above-described embodiment, the case where the pair of extraction claws 261L and 261R are integrally formed of the same metal plate member from the root portion to the distal end portion has been described. About the front end side, it may be made of, for example, a rubber plate or a resin plate that can be detached and has elasticity. Thereby, even if the tip part grasps the seedling 22 by the restoring force of the tension spring 263, the rubber plate is deformed by the elasticity of the tip side, so that the seedling 22 is not crushed.

  Further, the push rod 281 covers the upper ends of the pair of extraction claws 261L and 261R until the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R move in the vicinity of the position K6. Although configured, this can prevent the leaves of the seedling 22 on the tray 20 from being caught by the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R when moving from the position K5 to the position K6.

  In addition, the push rod 281 is configured to be retracted in accordance with the insertion speed when the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R are inserted into the seedling pot 21, thereby the leaves of the seedling 22 Can be prevented from being entangled with the tip portions 261Lp and 261Rp.

  Next, with reference to FIGS. 5 and 6 again, the mechanism for intermittently driving the tray feed rod 121 of the tray supply apparatus 100 will be further described.

  As shown in FIG. 6, the tray vertical feeding device 120 has (1) the above-described tray feeding rod 121 and (2) the upper end portion 121b1 of the both ends 121b of the tray feeding rod 121 fixed, and one of them bent inward. A feed rod arm 130 having a projecting cam 131 having a curved edge portion 131a formed at the lower portion, and (3) a root portion 141 is rotatably supported by the side plate 110a of the seedling table 110, and a feed rod at the tip portion 142. A feed arm 140 that rotatably supports the arm 130 and has a first recess 143a, a second protrusion 143b, and a third recess 143c formed smoothly and continuously in a side view at the lower edge, and (4) a seedling The longitudinal feed pivot shaft 151 that pivots in the direction of arrow E by the driving force obtained from the power source of the transplanter 1 is viewed from the side of the take-out device 200, and is located at two locations, the center position and the right end position of the longitudinal feed pivot shaft 151. Respectively fixed, provided with a longitudinal feeding drive arm 150 having a restraining roller 152 rotatably to the tip portion.

  Further, a feed arm tension spring 160 is attached between the front end portion 142 of the feed arm 140 and the lower portion 110a1 of the side plate 110a of the seedling table 110 so that a downward pulling force is always applied to the feed arm 140. ing. Further, a spring mounting rod 163 that holds the other end of the feed rod arm tension spring 161 having one end attached to the pin 132 attached to the upper end portion of the feed rod arm 130 is fixed to the root portion 141 of the feed arm 140. Has been.

  Next, the intermittent operation of the tray feed rod 121 will be described with reference to FIGS.

  It is assumed that the seedling table 110 is moved in the right direction, that is, in the direction of arrow F (see FIG. 5) by the rotation of the lead cam shaft 171. At that time, the longitudinal feed rotation shaft 151 is rotated in the direction of arrow E (see FIG. 6).

  In the meantime, the take-out device 200 sequentially takes out the seedlings 22 from the seedling raising pot 21 at the right end and supplies the seedlings 22 to the planting tool 11, and then the leftmost end when the seedling placement stand 110 moves to the rightmost end. The seedling 22 of the nursery pot 21 is taken out by the take-out device 200. Thereby, all the seedlings 22 for one horizontal row of the seedling pot 21 are taken out.

  At this time, it is rotatably attached to the front end portion of the vertical feed drive arm 150 which is rotated in the direction of arrow E together with the vertical feed rotary shaft 151 and which is fixed to the right end of the vertical feed rotary shaft 151. Since the check roller 152 is configured to start contact with the curved edge portion 131a of the feed rod arm 130 after a short delay after the contact with the first recess 143a of the feed arm 140 is started, the tray feed rod 121 is After the feed arm 140 has once moved upward with the clockwise rotation of the feed arm 140, it starts to rotate counterclockwise around the axis of the tip end portion 142.

  That is, when the tray feed rod 121 is once moved upward in the direction of the arrow 121a0 (see FIGS. 5B and 6), the protrusion 121ab of the tray feed rod 121 that has been held by the notch 112a until then. However, the center portion 121a of the tray feed rod 121 that has been waiting in the gap 21a on the back side of the seedling pot 21 is also moved upward in the direction of the arrow 121a0 within the range of the gap 21a. . Thereafter, the feed rod arm 130 starts to rotate counterclockwise about the axis of the tip end portion 142, whereby the central portion 121a of the tray feed rod 121 moves in the direction of the arrow 121a1 (see FIG. 6). In addition, the notch depth of the notch part 112a is set to such an extent that the center part 121a of the tray feed rod 121 can move within the range of the gap 21a.

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 continues to contact the curved edge portion 131a of the feed rod arm 130, so that the central portion 121a of the tray feed rod 121 is positioned in the retreat groove 111a. Maintained. At this time, the check roller 152 simultaneously moves from the first concave portion 143a of the feed arm 140 toward the second convex portion 143b, so that the feed arm 140 further rotates clockwise, and the central portion 121a of the tray feed rod 121 is As a result, it moves in the direction of the arrow 121a2 (see FIG. 6) while maintaining the state of being located in the retreat groove 111a.

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 is not in contact with the curved edge portion 131a of the feed rod arm 130, and at the same time, the feed rod arm 130 is moved by the restoring force of the feed rod arm tension spring 161. The central portion 121a of the tray feed rod 121 is instantaneously rotated clockwise about the axis of the tip portion 142, so that the arrow 121a3 is directed from the gap 21a toward the gap 21b located on the upper side by one row of the seedling pot 21. Move as shown in.

  Thereafter, when the check roller 152 continues to rotate, the check roller 152 moves while being in contact with the third recess 143 c of the feed arm 140, so that the feed arm 140 is moved downward by the restoring force of the feed arm tension spring 160. As a result, the central portion 121a of the tray feed rod 121 moves in the direction of the arrow 121a4 (see FIG. 6) while maintaining the state of being located in the gap 21b. The protrusion 121ab of 121a is held by the notch 112a.

  And the center part 121a of the tray feed rod 121 moved in the direction of the arrow 121a4 (see FIG. 6) maintains the state of being positioned in the gap between the seedling pots on the back side of the seedling pot 21, and the seedling stand 110 is When the movement starts in the arrow G direction, that is, the left direction, the take-out device 200 sequentially takes out the seedlings 22 from the seedling pot 21 at the left end and supplies the seedlings 22 to the planting tool 11. The seedling 22 of the rightmost breeding pot 21 is taken out by the take-out device 200 at the time of moving to. Thereby, all the seedlings 22 for one horizontal row of the seedling pot 21 are taken out.

  During this time, the projection 121ab of the central portion 121a of the tray feed rod 121 is held by the notch 112a, so that the tray 20 moves downward due to the weight of the seedling 22 placed in the seedling pot 21. Can be prevented.

  In addition, when all the seedlings 22 for one horizontal row of the seedling pot 21 are taken out, unlike the above, it can be freely rotated at the front end portion of the vertical feed driving arm 150 fixed to the center position of the vertical feed rotary shaft 151. The attached check roller 152 starts contact between the curved edge 131a of the feed rod arm 130 and the first recess 143a of the feed arm 140.

  By repeating the above-described operation, the tray 20 is moved rightward or leftward, and is intermittently vertically fed by one row of the seedling pot 21.

  Thereby, the tray vertical feeding device 120 having a compact structure is obtained. Further, the tray conveyance path 111 can be supported so as to be movable left and right with a simple structure of the guide rail 155 and the lead cam shaft 171.

  Further, since the central portion 121a of the tray feed rod 121 is disposed on the flat surface portion 111b of the tray conveying path 111, the tray 20 does not bend inward, so that a gap with a certain width is provided on the back side of the seedling pot 21. Since 21a and 21b can be secured, the tray feed rod 121 can surely enter the gaps 21a and 21b.

  Further, since the curved surface portion 111c is provided on the downstream side of the flat surface portion 111b of the tray conveyance path 111, the tray 20 bends along the curved surface. Therefore, even when the tray feed rod 121 is moving in the direction of the arrow 121a2 during tray feeding, the bending becomes resistance, and the tray 20 is prevented from shifting to the downstream side.

  Next, the seedling planting device 300 and the seedling planting device driving mechanism 400 described above will be further described with reference to FIGS. 10, 11, and 12.

  FIG. 10 is a left side view of the seedling planting device 300 and the seedling planting device driving mechanism 400.

  FIG. 11 is a schematic right side view for explaining the internal configuration of the seedling planting device driving mechanism 400, the regulating arm 460, and the driving device 1400 arranged on the right side surface of the seedling planting device driving mechanism 400. .

  12A is a plan view of the driving device 1400 and the stopper arm 1410 which are a part of the seedling planting device driving mechanism 400, and FIG. 12B is a back view of the driving device 1400 and the stopper arm 1410. FIG. 12C is a right side view of the driving device 1400 and the stopper arm 1410.

  As shown in FIG. 10, the seedling planting apparatus 300 includes a planting tool 11 for planting the seedling 22 in a field, an upper arm 311 and a lower arm arranged in parallel with each other for swinging the planting tool 11 in the vertical direction. A swing link mechanism 310 having an arm 312 and a vertically moving arm 320 that is rotatably attached to the lower arm 312 via a first connecting shaft 321 and moves the swing link mechanism 310 up and down are provided. The first connecting shaft 321 is fixed to the vertical movement arm 320.

  In addition, the vertical movement arm drive shaft 440 for rotating the vertical movement arm 320 is provided so as to protrude from the seedling planting device drive mechanism 400, and the vertical movement arm 320 is fixed to the tip portion thereof.

  Further, as shown in FIG. 10, the seedling planting device 300 is rotatably attached to the lower arm 312 via the second connection shaft 341 and opens and closes the planting tool 11, and the first connection shaft 321. And is rotated around the second connecting shaft 341 while being in contact with the outer peripheral edge of an opening / closing roller 342 that is pivotably attached to the tip of the opening / closing arm 340 via the third connecting shaft 343. Thus, the opening / closing cam 322 that swings the opening / closing arm 340 in the front-rear direction, one end 351 is connected to the third connection shaft 343 at the tip of the opening / closing arm 340, and the other end 352 is the opening / closing mechanism of the planting tool 11. And an open / close connection cable 350 connected to the 11a side.

  Here, the swing link mechanism 310 described above will be further described.

  That is, as shown in FIG. 10, the swing link mechanism 310 is supported by the front upper end portion 401a of the casing 401 housing the seedling planting device drive mechanism 400 so that the upper end is rotatably supported by the upper front shaft 313a, and the lower end is A front swing arm 316a that is rotatably connected to a connection support plate 315 via a lower front shaft 314a, and a rear upper end portion 401b that houses a seedling planting device drive mechanism 400, an upper end is an upper rear portion. An upper shaft provided on the connection support plate 315, having a rear swing arm 316b supported rotatably on the shaft 313b and having a lower end rotatably connected to the connection support plate 315 via the lower rear shaft 314b. The front end of the upper arm 311 described above is rotatably connected to 316, and the front end of the lower arm 312 described above is rotatably connected to the lower rear shaft 314b of the connection support plate 315. Each of the rear end of the upper arm 311 and lower arm 312 is pivotally connected to the rotating upper shaft 317a and the rotation under shaft 317b provided on the support plate 317 of the planting device 11.

  In addition, the seedling 22 of this Embodiment corresponds to an example of the transplant of this invention.

  With the above configuration, when the rotational driving force is transmitted to the vertical movement arm drive shaft 440 in the seedling planting device drive mechanism 400, the vertical movement arm 320 fixed to the vertical movement arm drive shaft 440 rotates in the direction of the arrow A1. By moving, the lower arm 312 and the upper arm 311 repeatedly swing up and down and swing back and forth, so that the planting operation of the seedling 22 by the planting tool 11 is performed with respect to the ridge U. Automatically done at intervals.

  Further, when the vertical movement arm 320 to which the first connecting shaft 321 is fixed rotates in the direction of arrow A1 during the planting operation, the opening / closing cam 322 fixed to the first connecting shaft 321 becomes the opening / closing roller. Since it rotates while contacting the outer peripheral edge of 342, the open / close arm 340 swings (rotates) forward (counterclockwise) about the second connecting shaft 341. Along with this operation, one end 351 of the open / close connection cable 350 is pulled in the forward direction, so that the open / close mechanism 11a operates to open the planting tool 11.

  Further, when the open / close arm 340 swings (rotates) backward (clockwise) about the second connecting shaft 341, the planting tool 11 provided in the open / close mechanism 11a is always biased in the closing direction. The one end 351 of the opening / closing connection cable 350 is pulled rearward by the action of a spring (not shown), so that the opening / closing mechanism 11 a operates to close the planting tool 11.

  With the above configuration, since the vertical movement arm 320 is driven by one axis, the structure is simple, and the vertical movement arm 320, the opening / closing arm 340, and the opening / closing cam 322 can be configured compactly, and the planting operation can be performed smoothly.

  Next, a clutch mechanism for turning on and off the transmission to the vertical movement arm drive shaft 440 in the seedling planting device drive mechanism 400 arranged on the right side of the seedling planting device 300 in plan view (see FIG. 2) will be mainly described with reference to FIG. This will be further described with reference to FIG.

  As shown in FIG. 11, the seedling planting device drive mechanism 400 includes a first gear 410 and a first gear 410 for transmitting the planting driving force output from the planting transmission device 18 to the planting clutch 420. When the planting clutch 420 and the planting clutch 420 are in the “ON” state, the transmission to the vertical movement arm drive shaft 440 is switched to the “ON” state or “OFF” state. A second gear 430 receiving a driving force from a transmission gear 421a fixed to the transmission shaft 421 of the planting clutch 420, and a small-diameter gear 430a fixed coaxially with the second gear 430. The third gear 450 fixed to the vertical movement arm drive shaft 440 is rotatably arranged so as to be engaged with the vertical movement arm drive shaft 440. Here, when the planting clutch 420 is in the “disengaged” state, the transmission shaft 421 of the planting clutch 420 stops without rotating and does not transmit the driving force to the second gear 430.

  In addition, you may use the conventional fixed position stop clutch as the planting clutch 420 of this Embodiment.

  Further, as shown in FIG. 11, the seedling planting device drive mechanism 400 is provided on the transmission downstream side of the planting clutch 420 and is fixed to the vertical movement arm drive shaft 440, and the planting clutch 420 is moved from the “entered” state. In order to forcibly switch to the “cut” state, an intermittent cam 441 having a convex portion 441 a formed at a part of a circular outer peripheral edge portion, and a tip end portion to contact the outer peripheral edge portion of the intermittent cam 441. A rotary shaft 461 having a first arm 460A arranged and having a second arm 460B arranged so that the tip portion thereof can be brought into contact with and separated from the planting clutch 420 and rotatably supported by the casing 401. And a restriction arm 460 fixed to the head.

  Here, when the tip end portion of the first arm 460A abuts on the convex portion 441a of the intermittent cam 441, the restriction arm 460 rotates counterclockwise about the rotation shaft 461 in the right side view (see FIG. 11). The tip of the second arm 460B comes into contact with the planting clutch 420, and the tip of the first arm 460A contacts the outer peripheral edge of the intermittent cam 441 other than the convex portion 441a. As a result of the contact, the regulating arm 460 rotates clockwise about the rotation shaft 461 (see arrow N in FIG. 11) in the right side view, and the distal end portion of the second arm 460B is detached from the planting clutch 420. It is the structure which separates.

  In addition, when the tip of the second arm 460B is separated from the planting clutch 420, the planting clutch 420 enters an “on” state, and when the tip of the second arm 460B contacts the planting clutch 420, the planting clutch 420 is engaged. Is in a “cut” state.

  The intermittent cam 441 of the present embodiment is an example of the cam member of the present invention, and the restriction arm 460 of the present embodiment is an example of the restriction member of the present invention.

  Moreover, the drive device 1400 of the seedling planting device drive mechanism 400 includes a stopper arm 1410 having one end fixed to the rotating shaft 461 and a stopper arm 1410 on the right side as shown in FIGS. When viewed from the right side, the tension spring 1420 and the stopper arm 1410 that are always urged in a direction to rotate clockwise about the rotation shaft 461 (see arrow N in FIG. 11) A stopper plate 1430 that restricts clockwise rotation (see arrow N in FIG. 11) at the center and a solenoid 1440 that drives the stopper plate 1430 in the left-right direction of the traveling vehicle body 15 are provided.

  One end of the tension spring 1420 is attached to the upper end side of the stopper arm 1410, and the other end is attached to the upper end side of the casing 401.

  Further, a rod-like rod 1443 movable in the left-right direction of the traveling vehicle body 15 protrudes from the right side surface portion 1440a of the solenoid 1440 (see FIGS. 12A and 12B), and the tip of the rod-like rod 1443 is cut off. The root portion 1431 of the stopper plate 1430 is connected to the notch portion.

  The solenoid 1440 is fixed on a rectangular solenoid mounting plate 1441 in a plan view, and the distal end portion of the stopper arm 1410 is disposed on the distal end side (the right side in FIG. 12A) of the solenoid mounting plate 1441. A first notch portion 1441 a into which 1410 a can enter is provided along the front-rear direction of the traveling vehicle body 15.

  Further, a solenoid fixing angle 1442 (see FIG. 12B) bent in a substantially L shape in a rear view is fixed to the lower surface of the solenoid mounting plate 1441 on the front end side. The solenoid fixing angle 1442 is also provided with a second cutout portion 1442a (see FIG. 12B) having the same shape at a position corresponding to the first cutout portion 1441a. A portion bent downward of the solenoid fixing angle 1442 is fixed to the upper end portion of the casing 401 by a fastening member 1442b.

  On the other hand, the stopper plate 1430 has a flange portion 1432 whose vertical width is wider than other portions between the root portion 1431 and the tip portion, and a certain vertical width is provided at a portion beyond the flange portion 1432. The action part 1433 having the lower end part and a non-action part 1434 whose vertical width is narrower than that of the action part 1433 are formed. The action portion 1433 has a function of restricting the movement of the stopper arm 1410 in the direction of the arrow N when the tip end portion 1410a of the stopper arm 1410 contacts, and the non-action portion 1434 passes through the tip portion 1410a of the stopper arm 1410. Thus, the stopper arm 1410 has a function of permitting movement in the arrow N direction.

  A back plate 1460 is fixed to the top surface of the solenoid mounting plate 1441 on the front end side by a fastening member 1460a. The back plate 1460 includes a first back plate 1461, a second back plate 1462 that is bent at a right angle from the front end 1461b of the first back plate 1461, and extends rightward with respect to the lateral width direction of the traveling vehicle body 15. The third back plate 1463 is further bent at a right angle from the lower end of the second back plate 1462 and extends in the forward direction with respect to the front-rear direction of the traveling vehicle body 15.

  The first back plate 1461 is disposed in parallel to the right side surface portion 1440a of the solenoid 1440 and has a rectangular slit 1461a. The upper and lower widths of the slit 1461a are configured such that the action portion 1433 of the stopper plate 1430 penetrates and can move in the directions of the arrows Q1 and Q2, but the flange portion 1432 of the stopper plate 1430 cannot penetrate. ing.

  Further, the second back plate 1462 has a third notch portion 1462a extending in the vertical direction into which the tip end portion 1410a of the stopper arm 1410 can enter.

  Further, the third back plate 1463 has a fourth notch portion 1463a communicating with the lower end portion of the third notch portion 1462a of the second back plate 1462, into which the tip end portion 1410a of the stopper arm 1410 can enter. .

  The fourth cutout portion 1463a of the third back plate 1463, the first cutout portion 1441a of the solenoid mounting plate 1441, and the second cutout portion 1442a of the solenoid fixing angle 1442 are completely overlapped with each other in plan view. It is comprised so that it may do (refer Fig.12 (a)).

  Further, a compression spring 1450 is disposed between the flange portion 1432 of the stopper plate 1430 and the right side surface portion 1440a of the solenoid 1440, and the stopper plate 1430 is moved in the direction of the arrow Q1 (FIGS. 12A and 12B). ))).

  In the solenoid 1440 of this embodiment, when energization to the solenoid 1440 (a short-time energization by a pulse signal) is started from a control unit 800 (see FIG. 15) to be described later, the rod-shaped rod 1443 of the solenoid 1440 is energized. However, this is a configuration in which the compression spring 1450 is attracted in the direction of the arrow Q2 against the urging force in the direction of the arrow Q1.

  That is, when the rod-like rod 1443 is sucked in the direction of the arrow Q2 by starting energization of the solenoid 1440, the action portion 1433 of the stopper plate 1430 passes through the slit 1461a and is drawn to the solenoid 1440 side, and the non-action portion 1434. However, it moves to the front side of the tip portion 1410a of the stopper arm 1410. That is, when the solenoid 1440 is energized, the position of the stopper plate 1430 is switched from the operating state to the non-operating state.

  Therefore, the movement restriction on the distal end portion 1410a of the stopper arm 1410 by the action portion 1433 of the stopper plate 1430 is released, and the stopper arm 1410 rotates clockwise about the rotation shaft 461 (see the arrow N in FIG. 11). While rotating, the tip of the second arm 460B is separated from the planting clutch 420.

  As a result, the planting clutch 420 shifts from the “cut” state to the “on” state, and the driving force from the engine is transmitted to the vertical arm drive shaft 440 side via the planting clutch 420. Then, the intermittent cam 441 fixed to the vertical movement arm drive shaft 440 starts to rotate.

  Note that the position of the stopper plate 1430 in the non-acting state is indicated by a two-dot chain line in FIG.

  Here, in a state where the position of the stopper plate 1430 is in an inactive state and the distal end portion 1410a of the stopper arm 1410 is entering the first cutout portion 1441a to the fourth cutout portion 1463a, the solenoid 1440 is moved to. A case where the energization is stopped will be described.

  That is, in this case, since the suction force by the solenoid 1440 is lost, the stopper plate 1430 connected to the rod-shaped rod 1443 jumps out in the direction of the arrow Q1 by the urging force of the compression spring 1450, but the notch portion of the non-operation portion 1434 Among them, an edge 1434a (see FIG. 12B) adjacent to the action portion 1433 comes into contact with the inner surface side of the distal end portion 1410a of the stopper arm 1410, and movement in the arrow Q1 direction is prevented. And since the front-end | tip part 1410a of the stopper arm 1410 is still maintaining the state which has entered into the 1st notch part 1441a-the 4th notch part 1463a, the planting clutch 420 is the front-end | tip of 1st arm 460A. The portion is in contact with the convex portion 441a of the intermittent cam 441, and the “entering” state is maintained until the state shifts to the “cut” state.

  Then, the intermittent cam 441 fixed to the vertical movement arm drive shaft 440 continues to rotate, and the tip of the first arm 460A comes into contact with the convex portion 441a of the outer peripheral edge of the intermittent cam 441. The planting clutch 420 shifts from the “ON” state to the “OFF” state.

  Thereby, transmission of the driving force to the vertically moving arm drive shaft 440 side is stopped.

  Further, the tip end portion of the first arm 460A abuts on the convex portion 441a of the outer peripheral edge portion of the intermittent cam 441, so that the stopper arm 1410 rotates counterclockwise about the rotation shaft 461 (the arrow in FIG. 11). (See M).

As a result, until the stopper plate 1430, the end edge 1434a (see FIG. 12B) adjacent to the action portion 1433 is in contact with the inner surface of the tip end portion 1410a of the stopper arm 1410, and the stopper plate 1430 moves in the direction of the arrow Q1. Is released from the state in which the movement is blocked, and then jumps out in the direction of the arrow Q1 so that the flange portion 1432 is a slit 1461a of the first back plate 1461.
It stops in contact with the upper and lower peripheral edges.

  When the planting clutch 420 shifts from the “ON” state to the “OFF” state, the tip of the first arm 460A passes through the contact position with the convex portion 441a of the intermittent cam 441, The seedling planting device drive mechanism 400 is configured so that the intermittent cam 441 stops rotating.

  Accordingly, when the planting clutch 420 is in the “disengaged” state, the stopper plate 1430 is moved in the direction of the arrow Q2 by energizing the solenoid 1440, or the operator moves the tip 1430a of the stopper plate 1430 (FIG. 12 ( Since the position of the stopper plate 1430 is switched from the operating state to the non-operating state by manually pressing (see a)) in the direction of the arrow Q2 at an arbitrary timing, the stopper arm 1410 whose movement has been restricted by the operating portion 1433 until then. Movement of the distal end portion 1410a is permitted, the stopper arm 1410 is rotated clockwise about the rotation shaft 461 (see the arrow N direction in FIG. 11), and the planting clutch 420 is moved from the “disengaged” state to “ It is possible to shift to the “enter” state.

  With the above configuration, the driving device 1400 has a simple structure in which only the stopper plate 1430 is driven by the solenoid 1440, so that the solenoid 1440 can be reduced in size, and can be reduced in weight and cost.

  Further, a compression spring 1450 is provided between the collar portion 1432 of the stopper plate 1430 and the right side surface portion 1440a of the solenoid 1440 so that an operator can plant at any timing regardless of whether the solenoid 1440 is energized or not. Since the clutch 420 can be in the “on” state, the planting position can be manually adjusted temporarily.

  In addition, maintainability is improved.

  Further, the second back plate 1462 arranged in parallel to the surface of the stopper plate 1430 allows the stopper plate 1430 to move smoothly because the sliding portion with the stopper plate 1430 is a flat surface.

  The tension spring 1420 of the present embodiment is an example of the biasing member of the present invention, and the stopper plate 1430 of the present embodiment is an example of the stopper of the present invention. Further, the solenoid 1440 of the present embodiment is an example of the actuator of the present invention. Moreover, the compression spring 1450 of this Embodiment corresponds to an example of the accommodation mechanism of this invention.

  Further, the tension spring 1420 described above has the tip of the second arm 460B in the direction in which the planting clutch 420 is in the “engaged” state, and the tip of the first arm 460A on the outer peripheral edge of the intermittent cam 441. A spring for biasing in the pressing direction.

  According to the above configuration, the intermittent clutch 441 provided on the downstream side of the transmission of the planting clutch 420 can be used to change the planting clutch 420 from the “on” state to the “disconnected” state. A planting mechanism can be realized.

  Further, the first arm 460A and the second arm 460B are configured to rotate integrally around the rotation shaft 461, and the rotation shaft 461 is more intermittent than the transmission shaft 421 of the planting clutch 420. By arranging on the side, the first arm 460A and the second arm 460B can be configured rationally and compactly.

  Next, with reference to FIG. 11, the items A to B are centered on the operation of the planting clutch 420 and the intermittent cam 441 for turning on and off the transmission to the vertical movement arm drive shaft 440 in the seedling planting device drive mechanism 400. Each of the three scenes of C will be explained.

  A. When the solenoid 1440 is energized (short-term energization by a pulse signal), the rod-shaped rod 1443 at the tip of the solenoid 1440 is attracted in the direction of the arrow Q2 against the restoring force (extension force) of the compression spring 1450.

  As a result, the action portion 1433 of the stopper plate 1430 connected to the rod-shaped rod 1443 passes through the slit 1461a of the first back plate 1461 and is pulled to the solenoid 1440 side, and the non-action portion 1434 is the tip of the stopper arm 1410. It moves to the front side of the edge portion 1410a1 (see FIG. 11) of the portion 1410a.

  That is, when the solenoid 1440 is energized, the restriction of movement of the stopper arm 1410 relative to the distal end portion 1410a by the action portion 1433 of the stopper plate 1430 is released, and the stopper arm 1410 rotates clockwise about the rotation shaft 461. The tip end of the stopper arm 1410 enters the first cutout portion 1441a and the tip end of the second arm 460B is separated from the planting clutch 420 by rotating (see arrow N in FIG. 11).

  Thereby, the operation | movement of the following i) and ii) is performed because the front-end | tip part of the 2nd arm 460B leaves | separates from the planting clutch 420. FIG.

  i) When the planting clutch 420 is in the “engaged” state and the transmission shaft 421 rotates, a driving force is transmitted to the second gear 430 side, and the vertical movement arm drive shaft 440 is transmitted via the third gear 450. Starts to rotate.

  ii) On the other hand, the distal end portion of the first arm 460A is separated from the convex portion 441a formed on the outer peripheral edge portion of the intermittent cam 441 and along the surface of the outer peripheral edge portion 441b (until just before this, the first arm 460A). The tip of the shaft passes through the convex portion 441a of the intermittent cam 441 and stops at a position isolated from the outer peripheral edge, while the planting clutch 420 is in the “disengaged” state, and the vertical movement arm drive shaft 440 rotates. The intermittent cam 441 and the vertically moving arm 320 continue to rotate.

  The solenoid 1440 is energized for a short time. After the energization is stopped, the solenoid 1440 does not generate a suction force in the direction of the arrow Q2 (see FIG. 12A), and the rod-shaped rod 1443 The connected stopper plate 1430 moves in the direction of arrow Q1 by the urging force of the compression spring 1450.

  However, the stopper 1434a (see FIG. 12B) adjacent to the action portion 1433 among the notches of the non-action portion 1434 of the stopper plate 1430 has already entered the first notch portion 1441a. The arm 1410 abuts on the inner surface side of the tip portion 1410a and is prevented from moving in the arrow Q1 direction.

  That is, even after the energization of the solenoid 1440 is stopped, the state where the distal end portion 1410a of the stopper arm 1410 enters the first cutout portion 1441a is maintained, so that the distal end portion of the first arm 460A is intermittent cam. The state along the surface of the outer peripheral edge is maintained away from the convex portion 441a formed on the outer peripheral edge of 441.

  Therefore, while the tip end portion of the first arm 460A is separated from the convex portion 441a formed on the outer peripheral edge portion of the intermittent cam 441 and the state along the surface of the outer peripheral edge portion is maintained, the second arm Since the distal end portion of 460B is separated from the planting clutch 420, the planting clutch 420 can maintain the “on” state, and the planting tool 11 (see FIG. 10) can be rotated by the rotation of the vertical movement arm 320. ) Continues to move up and down (planting operation), and the planting tool 11 performs the planting operation only once while the intermittent cam 441 rotates once.

  B. Thereafter, when the intermittent cam 441 completes one rotation, and at the same time the tip of the first arm 460A rides on the convex portion 441a of the intermittent cam 441, the stopper arm 1410 rotates counterclockwise around the rotation shaft 461. It rotates around (see arrow M in FIG. 11).

Thus, the stopper plate 1430 has an end edge portion 1434a (see FIG. 12B) adjacent to the action portion 1433 until the tip end portion 1410a of the stopper arm 1410.
Is in contact with the inner surface facing the solenoid 1440 and released from the state where the movement in the direction of the arrow Q1 is prevented, and then jumps out in the direction of the arrow Q1 so that the flange portion 1432 is formed in the slit 1461a of the first back plate 1461. Stops in contact with the upper and lower peripheral edges. At this time, the action portion 1433 of the stopper plate 1430 is positioned on the front side of the end edge portion 1410a1 (see FIG. 11) of the tip end portion 1410a of the stopper arm 1410.

  On the other hand, when the tip end portion of the first arm 460A rides on the convex portion 441a of the intermittent cam 441, the tip end portion of the second arm 460B comes into contact with the planting clutch 420, and the planting clutch 420 is moved from the “entered” state. In the “cut” state, the vertical arm drive shaft 440 stops rotating.

  At this time, the intermittent cam 441 stops rotating at a position where the tip end portion of the first arm 460A has passed the contact position with the convex portion 441a of the intermittent cam 441.

  The distal end portion 1410a (see FIG. 11) of the stopper arm 1410 is prevented from rotating clockwise (see arrow N in FIG. 11) by the action portion 1433 (see FIG. 12B) of the stopper plate 1430. Therefore, the tip end portion of the second arm 460B maintains a state in contact with the planting clutch 420.

  Accordingly, the following operations i) and ii) are performed when the tip of the second arm 460B contacts the planting clutch 420.

  i) The planting clutch 420 is changed from the “ON” state to the “OFF” state, and the rotation of the transmission shaft 421 stops, so that the driving force is not transmitted to the second gear 430 side. 440 stops rotating.

  ii) On the other hand, the tip end portion of the first arm 460A remains in a position passing through the contact position with the convex portion 441a formed on the outer peripheral edge portion of the intermittent cam 441 (until this time, the first arm 460A The tip portion is along the outer peripheral edge 441b of the intermittent cam 441, and the planting clutch 420 is in the “on” state, and the vertical movement arm drive shaft 440 continues to rotate)), and the intermittent cam 441 and the vertical movement Since the arm 320 continues to stop rotating, the planting tool 11 (see FIG. 10) continues to stop the vertical movement (planting operation).

  C. After that, when the solenoid 1440 is energized at an arbitrary timing, the planting clutch 420 enters the “engaged” state, and the operation described in item A above is started.

  According to the said structure, the time which the vertical motion (planting operation | movement) of the planting tool 11 has stopped can be adjusted by controlling the said arbitrary timing which supplies with electricity to the solenoid 1440. FIG. Thereby, intermittent planting is possible with a simple configuration.

  Further, when the planting clutch 420 is in the “disengaged” state, the operator pushes the distal end portion 1430a (see FIG. 12A) of the stopper plate 1430 in the direction of the arrow Q2 at an arbitrary timing by hand. Since the position of the stopper plate 1430 is switched from the operating state to the non-operating state, the movement of the distal end portion 1410a of the stopper arm 1410 that has been restricted by the operating portion 1433 is allowed to move, and the stopper arm 1410 is moved to the rotating shaft 461. , The planting clutch 420 can be shifted from the “disengaged” state to the “entered” state.

  Next, the various operation levers and the operation unit 600 arranged near the pair of left and right handle grips 8L and 8R of the steering handle 8 will be described with reference to FIG. FIG. 13 is a plan view for explaining various operation levers and the operation unit 600 arranged in the vicinity of the pair of left and right handle grips 8L and 8R of the steering handle 8. FIG.

  As shown in FIG. 13, a main clutch lever 80 is provided in the vicinity of the left handle grip 8L of the steering handle 8, and an elevating operation lever 81 for operating the hydraulic elevating cylinder 10 is provided in the vicinity of the right handle grip 8R. Is provided.

  In FIG. 13, for example, the position of the main clutch lever 80 is different from the positions shown in FIGS. 1 and 2, but their arrangement may be anywhere and is limited to these positions. is not.

  The raising / lowering operation lever 81 is configured to be manually switchable in three stages of “lowering”, “neutral”, and “raising”, and when switched to the “lowering” position, the hydraulic lifting cylinder 10 is to lower the traveling vehicle body 15. When the operation is stopped and the lowering is stopped by a sensor plate 710 (see FIG. 14), which will be described later, and the planting on / off button 620 (see FIG. 13), which will be described later, is in an ON state, the planting clutch 420 enters an “on” state. Planting work is started.

  When the lifting operation lever 81 is switched to the “neutral” position, the planting operation is stopped. When the lifting operation lever 81 is switched to the “raised” position, the hydraulic lifting cylinder 10 operates to raise the traveling vehicle body 15.

  Further, as shown in FIG. 13, on the operation panel 601, in order from the left end to the right end, (1) an empty planting operation button for operating only the planting tool 11 in a state where the traveling of the traveling vehicle body 15 is stopped. 610, and (2) when the lifting operation lever 81 is operated to the lowering operation position for lowering the traveling vehicle body 15, the planting tool 11 is operated in conjunction with the lowering operation, and is not interlocked with the lowering operation. A planting on / off button 620 that switches to any one of the states, (3) a display unit 630 that displays at least between planted strains, and (4) an adjustment button 640 that adjusts at least between planted strains are arranged.

  With the above configuration, the planting on / off button 620 is arranged near the center of the operation panel 601, and thus it is easy to operate.

  Moreover, since the sky planting operation button 610 is disposed on the left side of the rear surface 601b different from the upper surface 601a on which other operation buttons are disposed, erroneous operations by the operator can be reduced.

  Further, since the display unit 630 is disposed near the center of the operation panel 601, it is easy to confirm.

  The adjustment button 640 includes an “up” push switch 640 a that changes the stock in the direction of expanding the stock, and a “down” push switch 640 b that changes in the direction of narrowing the stock on the lower side.

  With the above configuration, by operating the “raising” push switch 640a and the “lowering” push switch 640b, the numerical value indicating between stocks is directly displayed on the display unit 630, so that an operator can easily recognize between stocks.

  Next, with reference mainly to FIGS. 14 and 15, a solenoid 1440 for performing planting on / off based on the operations of the planting depth adjusting mechanism 700, the planting on / off button 620, the lifting operation lever 81, and the like. The control unit 800 that controls the operation will be mainly described.

  FIG. 14 is a left side view illustrating a schematic configuration of the planting depth adjusting mechanism 700, and FIG. 15 is a schematic configuration diagram illustrating input / output to the control unit 800.

  As shown in FIG. 14, the planting depth adjusting mechanism 700 includes (1) a sensor plate 710 having a gently curved bottom surface that holds the seedling planting depth constant by contacting the farm scene 701, and (2 ) A substantially L-shaped plate-like member in a side view, wherein an L-shaped bent portion is rotatably supported with respect to the traveling vehicle body 15 by a rotation support shaft 721, and one end 722 extending rearward is a sensor plate. The other end 723 that is pivotally connected to the front end 711 of the 710 and the pivot support shaft 722a and that extends upward is manually operated by an operator in the vertical (up and down) direction of the sensor plate 710. A depth arm 720 that is pivotably connected to the distal end portion 741 of the transmission rod 740 that transmits the movement of the depth lever 730 for setting the position; and (3) the depth arm 720 is swingable from the main frame 17. A hanging spring 750, (4) It is a substantially L-shaped plate-like member in a plan view, and an L-shaped bent portion is rotatably supported with respect to the traveling vehicle body 15 by a rotation support shaft 761, and a long hole is formed below the rotation support shaft 761. 762 is formed, and is urged by the tension spring 766 connected to the upper end portion 763 to rotate in the arrow Y direction with the rotation support shaft 761 as an axis, and is provided in the hydraulic pressure switching valve portion 40. A counter arm 760 having a front end portion 764 connected by a rod 765 with respect to a lift operation valve (not shown), and (5) a counter arm 771 is positioned so that the front end side of the elongated hole 762 of the counter arm 760 is positioned. A planting switch 770 disposed on the arm 760, and (6) a connecting pin 781a provided at one end 781 is inserted into the elongated hole 762, and the other end 782 is connected via a connecting shaft 783. The upper end 712 and rotatably coupled to a sensor rod 780 of capacitors plate 710, and a.

  Further, the sensor rod 780 is interlocked with the swing in the arrow Z direction of the upper end 712 of the sensor plate 710 by the upward swing of the sensor plate 710, so that the front end edge portion 781b of the one end 781 is turned on and off. It moves to the direction which pushes the detection lever 771, and is the structure which turns on the planting switch 770.

  According to the above configuration, since the depth arm 720 is suspended by the spring 750, rattling of the connecting portion between the depth arm 720 and the depth lever 730 is eliminated, and the depth set by the depth lever 730 is stable. To do. The spring 750 is configured to suspend the depth arm 720, but is not limited thereto, and may be configured to press the depth arm 720 against the main frame side, for example.

  Further, according to the above configuration, the counter arm 760 is pulled by the tension spring 766 in the direction of pushing down the sensor plate 710, so that the backlash between the sensor rod 780 and the counter arm 760 can be eliminated.

  Further, by changing the elastic force of the tension spring 766, the force pushing the sensor plate 710 can be changed.

  Next, a method for controlling the solenoid 1440 by the control unit 800 provided below the operation panel 601 will be described with reference to FIG.

  As shown in FIG. 15, the control unit 800 receives at least an on / off signal from the planting on / off button 620, a switching signal of the lifting operation lever 81, and an on / off signal from the planting switch 770. The pulse signal is output to the solenoid 1440.

  Based on the above configuration, the operation of the control unit 800 will be mainly described with reference to FIGS.

  Here, after moving the seedling transplanter 1 to a predetermined position in the field, (1) a scene where the planting operation is to be started, and then (2) a scene where the planter is traveling while planting in the field, and (3) The explanation will be divided into scenes that come to the edge of the kite and turn.

(1) Scenes where planting work is about to start:
When the seedling transplanter 1 is moved to a predetermined position in the field, the planting on / off button 620 is set to the “on” state, and the lifting operation lever 81 is set to the “up” position. Is in a high position.

  When the operator operates the elevating operation lever 81 to the “lower” position to lower the vehicle height of the traveling vehicle body 15, the sensor plate 710 is lowered together with the traveling vehicle body 15 toward the farm scene 701.

  When the sensor plate 710 comes into contact with the farm scene 701, the front end 711 of the sensor plate 710 rotates in the arrow Z direction, so that the front end edge 781b of the sensor rod 780 moves in the direction of pushing the on / off detection lever 771 and is planted. By turning on the switch 770, an ON signal from the planting switch 770 is input to the control unit 800.

  The control unit 800 outputs a signal indicating the “ON” state from the planting on / off button 620, a signal indicating the “down” position from the lifting operation lever 81, and an “ON” signal from the planting switch 770 under AND conditions. In response to this, a signal for energizing the solenoid 1440 is output.

  Thereby, the planting clutch 420 is switched from the “cut” state to the “on” state, and the planting operation is started.

(2) Scene of traveling while planting in the field:
Here, it is assumed that the raising / lowering operation lever 81 is in the “down” position, and the sensor plate 710 moves up and down according to the unevenness of the farm scene 701.

  In addition, the control unit 800 outputs a pulse signal at the operation cycle to energize the solenoid 1440 at a predetermined operation cycle. Accordingly, the planting clutch 420 enters the “ON” state when the solenoid 1440 is energized, and the intermittent cam 441 starts to rotate and completes one rotation (that is, the seedling planting operation is performed once). When finished, a series of operations of returning to the “off” state is repeated in the operation cycle.

  Thereby, a planting operation | work is performed intermittently and desired planting stock | strain is implement | achieved.

  In response to the vertical movement of the sensor plate 710, the hydraulic lifting cylinder 10 operates as follows.

  That is, when the sensor plate 710 moves upward, the front end 711 of the sensor plate 710 moves in the direction of the arrow Z around the rotation support shaft 722a, and the connecting pin 781a provided at one end 781 of the sensor rod 780 When moving in the direction of pushing the front edge of the long hole 762, the counter arm 760 rotates in the clockwise direction in FIG. 14 with the rotation support shaft 761 as the axis, and this movement is via the rod 765 and the hydraulic pressure switching valve. It is transmitted to an elevating operation valve (not shown) provided in the section 40 and is operated in the direction in which the hydraulic elevating cylinder 10 extends, and the vehicle height of the traveling vehicle body 15 is increased.

  On the other hand, when the sensor plate 710 moves downward, the front end portion 711 of the sensor plate 710 moves in the direction opposite to the arrow Z direction around the rotation support shaft 722a and is connected to one end portion 781 of the sensor rod 780. When the pin 781a moves in a direction away from the front edge portion of the long hole 762, the counter arm 760 rotates in the arrow Y direction with the rotation support shaft 761 as the axis by the pulling force of the tension spring 766, and this movement is the rod 765. Is transmitted to a lifting operation valve (not shown) provided in the hydraulic pressure switching valve portion 40, and the hydraulic lifting cylinder 10 is operated in a shorter direction, and the vehicle height of the traveling vehicle body 15 is lowered.

  By the above operation, even if the farm scene 701 is uneven, the planting depth of the seedling can be kept constant.

(3) A scene of turning to the edge of the kite:
In this scene, the operator moves the lifting operation lever 81 from the “lower” position to the “neutral” position in order to interrupt the planting operation.

  Accordingly, the control unit 800 receives the signal indicating the “neutral” position from the elevating operation lever 81 and stops outputting the pulse signal to the solenoid 1440. Thus, after the planting clutch 420 is switched from the “ON” state to the “OFF” state, the “OFF” state is continuously maintained, so that the planting operation is interrupted.

  Further, the operator moves the lifting / lowering operation lever 81 from the “neutral” position to the “raised” position in order to turn the traveling vehicle body 15 toward the adjacent saddle.

  In conjunction with the movement of the cable 82 in response to the operation of the elevating operation lever 81, the elevating operation valve (not shown) provided in the hydraulic pressure switching valve unit 40 is operated, and the hydraulic elevating cylinder 10 moves in the extending direction. As a result, the vehicle height of the traveling vehicle body 15 increases.

  At this time, the sensor plate 710 is lowered and the planting switch 770 is turned off, but no signal is output from the control unit 800.

  The planting clutch 420 is maintained in the “disengaged” state, and the state where the planting operation is interrupted is continued.

  Therefore, the worker turns the traveling vehicle body 15.

  Next, when the operator moves the elevating operation lever 81 from the “raised” position to the “lowered” position through the “neutral” position, the hydraulic pressure is moved in conjunction with the movement of the cable 82 according to the operation of the elevating operation lever 81. When the lifting operation valve provided in the switching valve unit 40 is operated and the hydraulic lifting cylinder 10 is moved in the direction of shortening, the vehicle height of the traveling vehicle body 15 begins to decrease. Note that a signal indicating that the elevating operation lever 81 is in the “down” position is output to the control unit 800 by the operation of the elevating operation lever 81.

  Then, when the vehicle body of the traveling vehicle body 15 descends and the sensor plate 710 eventually comes into contact with the farm scene 701, the planting switch 770 is turned on as described in the above item (1), and the signal is transmitted to the control unit. 800 is input.

  Since the planting on / off button 620 remains in the “on” state, the control unit 800 transmits a signal indicating the “on” state from the planting on / off button 620 and a signal indicating the “down” position from the elevating operation lever 81. When the “ON” signal is received from the planting switch 770 under the AND condition, a signal for energizing the solenoid 1440 is output. That is, similarly to the above, the control unit 800 outputs a pulse signal at the operation cycle so that the solenoid 1440 is energized at a predetermined operation cycle.

  Thereby, the planting clutch 420 is switched from the “cut” state to the “entered” state, and the planting operation is started again.

  With the above configuration, by setting the planting on / off button 620 to the “on” state, the above-described (1) planting operation is started only by operating the elevating operation lever 81, and then (2) the farm field. A series of operations can be carried out continuously, such as traveling while planting inside, and (3) planting again after coming to the end of the fence and turning.

  In the above embodiment, as an example of the actuator of the present invention, the configuration using the solenoid 1440 including the rod-shaped rod 1443 that is pulled in the Q2 direction (see FIG. 12A) when energized has been described. For example, as another example of the actuator of the present invention, a second rod-shaped rod (see reference numeral 1443 in FIG. 12A) that protrudes in the Q1 direction (see FIG. 12A) when energized is provided. An actuator may be used. In the case of this configuration, the arrangement of the action part and the non-action part of the second stopper plate (see reference numeral 1430 in FIG. 12B) connected to the second rod-shaped rod is different from the action part 1433 of the stopper plate 1430 described above. This is a configuration opposite to the arrangement of the action unit 1434. That is, in this configuration, when the current is supplied to the actuator and the second stopper plate protrudes in the Q1 direction, the tip end portion 1410a of the stopper arm 1410 passes through the non-acting portion, and the current supply to the actuator is stopped. When the second stopper plate is pulled in the Q2 direction, the distal end portion 1410a of the stopper arm 1410 abuts against the action portion, and movement in the forward direction of the machine body is restricted.

(Embodiment 2)
In the second embodiment, another seedling transplanter according to an embodiment of the transplanter of the present invention will be described with reference to FIGS. 16 to 18.

  In the present embodiment, the same components as those in the seedling transplanter 1 of the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted, and differences will be mainly described.

  That is, the seedling transplanter of the second embodiment includes a scraper device 1500 that drops mud and the like attached to the outer surface and the inner surface of the second planting tool 2011 in synchronization with the vertical movement of the second planting tool 2011. This is different from the configuration of the first embodiment.

  FIG. 16 is a schematic side view illustrating the scraper device 1500.

  FIG. 17 is a schematic plan view for explaining the scraper device 1500.

  FIG. 18 is a schematic side view for explaining the operation of the scraper device 1500.

  As shown in FIGS. 16 and 17, the scraper device 1500 includes a pair of left and right left hopper portions 1011L and a right hopper whose front end side opens and closes in the left and right direction near the bottom dead center while moving up and down along a trajectory T1 (see FIG. 1). A rubber scraper that is disposed behind the portion 1011R (see FIGS. 3 and 16) and scrapes the outer wall surface and the inner wall surface of the pair of left and right hoppers to remove mud and the like adhering to the inner wall surface. 1510 and a scraper fulcrum shaft fixed to the frame 15a of the traveling vehicle body 15 having a scraper attachment portion 1521 for attaching the scraper 1510 to the lower end portion 1520a and located above the second planting tool 2011 in a side view. 1522, a scraper arm 1520 having an upper end 1520b rotatably connected in the front-rear direction, and a left hopper ho Cam mounting pin erected outward from the left side surface of the holder holding frame 1013 that holds the der 1012L and the right hopper holder 1012R (see FIGS. 3B and 17) so as to be rotatable about the fulcrum shaft 1013a. And a scraper cam 1530 having a substantially half-moon shape fixed to the tip of 1533 in a side view.

  As shown in FIG. 16, the scraper cam 1530 has a substantially half-moon shape in a side view, but a substantially vertical first edge 1531 is formed on the upper end side, and an arcuate second edge is formed below the first edge 1531. 1532 is formed.

  Further, a scraper arm tension spring 1550 having one end hooked on the upper end portion 1520b of the scraper arm 1520 and the other end hooked on the frame 15a of the traveling vehicle body 15 is disposed, and the scraper arm 1520 includes the scraper arm 1520. Due to the contraction force of the arm tension spring 1550, a force to rotate counterclockwise in the left side view, that is, toward the rear side, is always acting with the scraper fulcrum shaft 1522 as the center of rotation.

  On the other hand, when the scraper arm 1520 is in the standard position (position when not scraped), the scraper arm 1520 hits the seedling tank frame 101 to stop the movement to rotate toward the rear side.

  An impact absorbing stopper (not shown) for absorbing an impact when the scraper arm 1520 hits the seedling tank frame 101 is provided between the scraper arm 1520 and the frame 15a.

  Further, a scraper roller stay 1541 that rotatably holds a scraper roller 1540 at the tip end portion is fixed to the left side surface of the lower end portion 1520a and the upper end portion 1520b of the scraper arm 1520. The roller 1540 is disposed at a position in contact with the scraper cam 1530 at a predetermined timing.

  With the above configuration, the scraper fulcrum shaft 1522 is fixed to the upper frame 15a of the traveling vehicle body 15 in a side view, and is fixed to the front side of the scraper 1510 in a normal non-operating state in which the scraper 1510 is retracted rearward. Therefore, the scraper 1510 is higher in the normal non-operating state than in the scraper operating state, and is less likely to interfere with the planted seedling.

  In addition, the 2nd planting tool 2011 of this Embodiment corresponds to an example of the planting hopper of this invention.

  Next, mainly using FIG. 18, the operation of the scraper device 1500 will be described in relation to the vertical movement of the distal ends of the pair of left and right hopper portions 1011L and 1011R of the second planting tool 2011.

  (1) After the second planting tool 2011 has planted the seedling 22 in the field, a pair of left and right hopper portions 1011L and 1011R move to the hopper first position T1a on the trajectory T1, and further left and right pairs from there. A scene in which the tips of the hopper parts 1011L and 1011R rise will be described.

  In this scene, the pair of left and right hopper portions 1011L, 1011R is in the ascending process with the tip open, and the scraper cam 1530 fixed via the cam mounting pin 1533 on the left side surface of the holder holding frame 1013 is the same. To rise.

  That is, when the scraper cam 1530 rises to the first cam position 1530a corresponding to the first hopper position T1a, the scraper roller of the scraper arm 1520 in which the tip of the scraper cam 1530 is located at the standard position. By contacting the rear side of the lower end surface of 1540, the scraper roller 1540 is moved forward, and the scraper arm 1520 starts moving forward (see arrow S in FIG. 18).

  Further, the scraper cam 1530 also rises as the tips of the pair of left and right hopper portions 1011L, 1011R rise in a substantially vertical direction. As the scraper cam 1530 rises, the scraper roller 1540 moves on the first edge 1531 on the upper end side of the scraper cam 1530, but the first edge 1531 has a substantially vertical end surface. Therefore, the scraper arm 1520 and the scraper 1510 remain in the same position without moving in the front-rear direction.

  As a result, the tip portion 1511 (see FIG. 17) of the scraper 1510 staying at the same position enters the rear V-shaped cutout portion 1200B of the pair of left and right hopper portions 1011L and 1011R, and both ends of the scraper 1510. The front end side of the portion 1512 scrapes the outer wall surfaces of the pair of left and right hopper portions 1011L and 1011R.

  (2) The case where the second planting tool 2011 continues to rise and the tips of the pair of left and right hoppers 1011L and 1011R move to the hopper second position T1b on the trajectory T1 will be described.

  In this scene, the pair of left and right hopper portions 1011L and 1011R is in the ascending process with the tips thereof open, and the scraper cam 1530 is also raised in the same manner.

  That is, as the scraper cam 1530 rises to the cam second position 1530b corresponding to the hopper second position T1b, the arc-shaped end surface of the second edge portion 1532 of the scraper cam 1530 becomes the rear end surface of the scraper roller 1540. Further, the scraper roller 1540 is moved forward while being in contact with.

  At the same time, the scraper arm 1520 further moves to the front side (see arrow S in FIG. 18), and the scraper 1510 enters the inside from the rear gap between the pair of left and right hopper portions 1011L and 1011R.

  (3) Then, the second planting tool 2011 further rises, and the tips of the pair of left and right hopper portions 1011L and 1011R reach the hopper third position T1c on the trajectory T1 from the hopper second position T1b on the trajectory T1. The operation of the scraper 1510 in the process up to here will be described.

  In this process, as the scraper cam 1530 rises from the cam second position 1530b corresponding to the hopper second position T1b to the cam third position 1530c corresponding to the hopper third position T1c, the scraper cam 1530 The scraper 1510 moves slightly forward as shown in FIG. 18 because the arc-shaped surface having a relatively gentle curve in the side view of the second edge 1532 rises in contact with the rear end surface of the scraper roller 1540. And the same height is maintained inside the pair of left and right hopper portions 1011L and 1011R.

  However, since the second planting tool 2011 continues to move upward, the tip 1511 and both ends 1512 of the scraper 1510 effectively squeeze mud and the like attached to the inner wall surfaces of the pair of left and right hoppers 1011L and 1011R. Can be removed.

  (4) Then, when the second planting tool 2011 further rises and the tips of the pair of left and right hopper portions 1011L and 1011R pass through the hopper third position T1c on the trajectory T1, the scraper cam 1530 becomes the hopper third The cam moves to a position above the scraper roller 1540 at a third cam position 1530c corresponding to the position T1c. As a result, the scraper roller 1540 is released from contact with the scraper cam 1530, and the scraper arm 1520 is moved rearward at a stretch by the contraction force of the scraper arm tension spring 1550, and the scraper 1510 is a pair of left and right hopper portions. It stops when it comes out of the inside of 1011L and 1011R and hits the seedling tank frame 101. At this time, a shock absorbing stopper (not shown) absorbs the shock when stopped.

  Thereafter, the second planting tool 2011 closes the distal ends of the pair of left and right hopper portions 1011L and 1011R near the top dead center, moves on the trajectory T1, and repeats the operations (1) to (4).

  Accordingly, the scraper device 1500 including the scraper 1510 can be housed in a narrow space, the body can be made compact, the amount of movement of the scraper 1510 can be secured, and the outer and inner surfaces of the pair of left and right hopper portions 1011L and 1011R Can be scraped accurately.

(Embodiment 3)
In the third embodiment, still another seedling transplanter according to an embodiment of the transplanter of the present invention will be described with reference to FIGS.

  In the present embodiment, the same components as those in the seedling transplanter 1 of the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted, and differences will be mainly described.

  That is, the seedling transplanting machine of the third embodiment is provided with a pair of left and right crawler traveling devices instead of the pair of left and right rear wheels 3 of the seedling transplanting machine of the above embodiment. Different from transplanter.

  First, the crawler traveling device 500 of the seedling transplanter 1 of the present embodiment will be described with reference to FIG.

  FIG. 19 is a schematic side view showing the left crawler traveling device 500, the left traveling transmission case 60, and the left driven front wheel 2 in the planting work posture of the seedling transplanter 1 of the present embodiment.

  The right crawler traveling device 500, the right traveling transmission case 60, and the right driven front wheel 2 of the seedling transplanter 1 of the present embodiment are the left crawler traveling device 500, the left traveling transmission case 60, and the left driven front wheel 2. Since the configurations are the same, the description thereof is omitted.

  As described above, the traveling transmission case 60 is configured to be rotatable about the input shaft 61, and the rotational driving force from the engine 12 is input to the input shaft 61 and decelerated at a predetermined reduction ratio. And transmitted to the output shaft 62.

  The output shaft 62 protrudes outward from the traveling transmission case 60, and the driving wheel 510 of the crawler traveling device 500 is attached to the distal end side of the output shaft 62.

  As shown in FIG. 19, the crawler traveling device 500 includes a drive wheel 510, a driven wheel 520, a first idler wheel 531, a second idler wheel 532, the drive wheel 510, a driven wheel 520, and a first wheel. An idler wheel 531 and a synthetic rubber crawler 540 wound around the outer edge of the second idler wheel 532 and having a plurality of protrusions integrally formed on the outer peripheral surface thereof.

  Further, the drive wheel 510 is provided with a sprocket brake 511, and is driven using frictional force with the drive wheel 510 in conjunction with the operation of the side clutch levers 85 provided on the left and right steering handles 8, respectively. In this configuration, the ring 510 is stopped.

  A side clutch lever 85 provided on the right steering handle 8 has a side clutch cable (not shown) for turning on and off the driving force to the input shaft 61 of the right traveling transmission case 60, and a right clutch. A sprocket brake cable (not shown) for turning on / off a sprocket brake 511 provided on a drive wheel 510 attached to the output shaft 62 of the traveling transmission case 60 is connected.

  The side clutch lever 85 provided on the left steering handle 8 has the same configuration as described above.

  As a result, by operating one of the left and right side clutch levers 85, transmission of the driving force to the driving wheel 510 on the operated side becomes “OFF”, and rotation due to inertia of the driving wheel is braked. Therefore, the crawler 540 on the operated side can be braked accurately, and the traveling vehicle body 15 can be turned slightly.

  Further, as shown in FIG. 19, the crawler traveling device 500 includes a traveling transmission case side support plate 550 and a driven rolling wheel support plate for fixing the driven wheel 520 to the traveling transmission case 60 so as to be slidable in the front-rear direction. 560 and an idler wheel support plate 570 that is swingably connected to the driven wheel support plate 560 via a support pin 571 and supports the first and second idler wheels 531 and 532. doing.

  Further, as shown in FIG. 19, a compression spring 572 is provided between the upper right end side of the idler wheel support plate 570 and the lower right end portion of the driven wheel support plate 560.

  As a result, when the seedling transplanter 1 is lifted with the downward movement of the traveling transmission case 60 and the crawler 540, the compression spring 572 causes the second idler wheel 532 disposed on the rear side to face the crawler grounding surface 540a. In order to push, the ground load is mainly received by the rear second idler wheel 532, and the change in the ground load between the front wheel 2 and the crawler 540 can be reduced.

  Further, as shown in FIG. 19, the height from the ground of the support pin 571 to which the idler wheel support plate 570 is swingably connected, and the height from the ground of the input shaft 61 as the rotation fulcrum of the traveling transmission case 60. Therefore, the change in the contact load between the front wheel 2 and the crawler 540 is reduced because the traveling transmission case 60 and thus the crawler 540 are less moved back and forth in the vertical movement.

  Further, the front end portion of the traveling transmission case side support plate 550 is directly fixed to the rear end portion of the traveling transmission case 60, and two through holes (not shown) are provided in the central portion and the rear end portion.

  On the other hand, on the front end side of the driven wheel support plate 560, two long holes 561 corresponding to the two through holes provided in the traveling transmission case side support plate 550 described above are provided. By tightening a nut (not shown) to the bolt 562 inserted into the through-hole from the hole 561 side, the driven wheel support plate 560 has a width before and after the elongated hole 561 with respect to the traveling transmission case side support plate 550. It is the structure fixed so that a slide movement is possible in the front-back direction within the range.

  Further, in the seedling transplanter 1 of the present embodiment, the traveling transmission case 60 is being planted around the input shaft 61 with the driven front wheel 2 and the crawler grounding surface 540a of the crawler traveling device 500 in contact with the horizontal plane. 2, the two long holes 561 are located below the driven wheel shaft 521 of the driven wheel 520 and the first free rotation of the first free wheel 531 in a side view. The wheel shaft 531a and the second free wheel 532 are positioned above the second free wheel shaft 532a (see FIG. 19).

  As a result, the tension of the crawler 540 can be easily adjusted.

  Further, according to the above configuration, the hydraulic lifting cylinder 10 expands and contracts in response to the switching operation of the lifting operation lever 81 and the vertical movement of the sensor plate 71 during the planting operation, and the traveling transmission case 60 rotates the input shaft 61 about the rotation center. , The crawler traveling device 500 moves upward while holding the crawler ground contact surface 540a in a horizontal state, so that the vehicle height decreases.

  On the other hand, when the traveling transmission case 60 rotates clockwise around the input shaft 61, the crawler traveling device 500 moves downward while holding the crawler grounding surface 540a in a horizontal state, so the vehicle height is high. Become.

  The left and right driven front wheel support rods 211 are attached to the left and right ends of the driven front wheel support stay 210 provided below the engine 4 so that the height can be adjusted, and the driven front wheels 2 are respectively attached to the lower ends of the left and right driven front wheel support rods 211. It is pivotally attached.

  Further, in the seedling transplanter 1 of the present embodiment, the range of rotation during the planting operation of the traveling transmission case 60 around the input shaft 61 with the driven front wheel 2 and the crawler grounding surface 540a in contact with the horizontal plane. Inside, in a side view, the driven wheel shaft 521 of the driven wheel 520 is located above the output shaft 62, and the first idle wheel shaft 531 a and the second idle wheel shaft 532 a are from the output shaft 62. Is also located on the lower side (see FIG. 19).

  Further, the seedling transplanter 1 of the present embodiment has a configuration in which the output shaft 62 is higher than the input shaft 61 in a side view when the driven front wheel 2 and the crawler grounding surface 540a are in contact with the horizontal plane.

  As a result, the difference in height between the input shaft 61 of the traveling transmission case 60 and the crawler grounding surface 540a is reduced, so that the crawler traveling apparatus 500 is moved up and down by the rotation of the traveling transmission case 60 in the direction of arrow A during planting work. The back and forth movement of the crawler grounding portion 540a due to the movement can be suppressed.

  Further, by providing the input shaft 61 and the output shaft 62 individually in the traveling transmission case 60 and attaching the drive wheels 510 to the output shaft 62, the distance between the drive wheels 510 and the rear second idler wheel 532 is shortened. The crawler traveling device 500 can be shortened in the front-rear width W.

  Further, in the seedling transplanter 1 of the present embodiment, the range of rotation during the planting operation of the traveling transmission case 60 around the input shaft 61 with the driven front wheel 2 and the crawler grounding surface 540a in contact with the horizontal plane. Inside, the driven wheel shaft 521 on the front side of the intermediate position in the front-rear direction of the first and second rotating wheel shafts 531a and 532a is disposed in a side view (see FIG. 19).

  Accordingly, the crawler traveling device 500 can be configured in a compact manner, and the crawler traveling device 500 can be prevented from interfering with other members (for example, a seedling tank) by the vertical movement of the crawler traveling device 500.

  In the above embodiment, the configuration has been described in which the driven wheel 520 is fixed to the traveling transmission case 60 so as to be slidable in the front-rear direction. In addition to this configuration, as shown in FIG. The traveling device 2500 may be configured to be slidable in the left-right direction with respect to the second traveling transmission case 360. FIG. 20 is a schematic perspective view of a connecting portion when the left second crawler traveling device 2500 is configured to be slidable in the left-right direction with respect to the left second traveling transmission case 360. Here, the same reference numerals are given to the same components as those in the above embodiment, and the description thereof is omitted. Further, the second crawler traveling device (not shown) on the right side has the same configuration as the second crawler traveling device 2500 on the left side, and thus the description thereof is omitted.

  In the configuration example shown in FIG. 20, the output shaft 62 protrudes outward from the center position in the front-rear direction of the side surface of the second traveling transmission case 360 and is coaxial with the input shaft 61 disposed on the front side of the output shaft 62. The front slide shaft 361 protrudes in parallel with the output shaft 62 from the side surface of the second traveling transmission case 360 to the outside at the position and is fixed by welding, and the second traveling transmission case 360 is disposed on the rear side of the output shaft 62. A rear slide shaft 362 protrudes in parallel with the output shaft 62 from the side surface to the outside and is fixed by welding.

  On the other hand, the second crawler traveling device 2500 includes a second traveling transmission case side support plate 2550 instead of the traveling transmission case side support plate 550 directly fixed to the rear end portion of the traveling transmission case 60 of the above embodiment. Is provided.

  Further, the second travel transmission case side support plate 2550 is connected to the second travel transmission case 360 via a front slide shaft 361 and a rear slide shaft 362 so as to be slidably movable, and A rear pipe member 2552 and a central pipe member 2553 for passing through the output shaft 62 are connected.

  That is, the rear pipe member 2552 is fixed to the front end portion of the second traveling transmission case side support plate 2550, and the central pipe member 2553 is connected and fixed to the rear pipe member 2552 via the rear fixing plate 2554B. The front pipe member 2551 is connected and fixed to the central pipe member 2553 via a front fixing plate 2554F.

  The second traveling transmission case side support plate 2550 is provided with two through holes (not shown) corresponding to the two long holes 561 provided in the driven wheel support plate 560 in the above embodiment. This is the same as the traveling transmission case side support plate 550.

  When the operator performs tread adjustment of the second crawler traveling device 2500 on the left side of the seedling transplanter 1 and the second crawler traveling device on the right side (not shown) of the seedling transplanter 1, the front pipe member 2551 and the rear side are configured. The pipe member 2552, the front slide shaft 361 and the rear slide shaft 362 are fitted and inserted into each other and slid and positioned at a desired position, and then fixed with bolts 2555. Then, the drive wheel 510 is fixed to the output shaft 62 protruding from the outer opening 2553a of the central pipe member 2553 with bolts (not shown). Thereby, the position adjustment of the crawler 540 in the left-right direction can be performed. Further, even if the position adjustment in the left-right direction is performed, the driving force from the output shaft 62 to the crawler 540 can be accurately transmitted. It should be noted that tread adjustment is appropriately performed for the left and right driven front wheels 2 as well.

  Further, in the configuration shown in FIG. 20, an oil supply port 90 for supplying lubricating oil is provided on the upper end surface of the second traveling transmission case 360, and an oil supply cap 91 is detachably provided in the oil supply port 90. It has been. Further, an oil discharge port 92 for discharging the lubricating oil to a position on the front end surface of the second traveling transmission case 360 that moves up and down in the rotation range of the second traveling transmission case 360 in a normal planting operation. An oil drain cap 93 is detachably provided at the oil drain port 92. Accordingly, whether or not the oil discharge port 92 is filled with the oil level of the lubricating oil up to the oil discharge port 92 in the normal work posture (the rotation range of the second traveling transmission case 360 in the normal planting work). That is, it can be used as an oil level confirmation hole (oil inspection port) for confirming whether or not the oil level is in an appropriate state. When the lubricating oil in the second traveling transmission case 360 is discharged from the oil discharge port 92, the second traveling transmission case 360 is set to the most moved position (a state where the traveling vehicle body 15 is lowered most) in the rotation range, In the second traveling transmission case 360, the oil discharge port 92 is placed in the lower position. If necessary, the connection of the connecting rod 9a and the second traveling transmission case 360 (swing arm 63a) is removed, and the operator lifts the second traveling transmission case 360, etc. The oil discharge port 92 may be located in the lower part.

  Next, when the operator pushes down the steering handle 8 and lifts the driven front wheel 2 and the traveling transmission case 60 by using FIGS. 21 to 22, the steering handle 1 is lifted up. A configuration capable of reducing the force required to push down 8 will be described.

  FIG. 21 is a schematic left side view of third crawler traveling device 3500 of the present embodiment. FIG. 22 is a schematic left side view showing a state of the third crawler traveling device 3500 when the seedling transplanter 1 including the third crawler traveling device 3500 of FIG. 21 is lifted up to the maximum height.

  In the present embodiment, the same components as those in the crawler traveling device 500 described with reference to FIG. 19 are denoted by the same reference numerals, description thereof is omitted, and differences will be mainly described.

  That is, the third crawler traveling device 3500 shown in FIG. 21 can be rotated with respect to the driven wheel support plate 560 within a predetermined range necessary for exceeding the dead point described later, with the rotation fulcrum 563 as the center. A spring stay 564 is attached.

  Further, the third crawler traveling device 3500 shown in FIG. 21 is provided with a dead center extending tension spring 590 having one end 591 connected to the spring stay 564 and the other end 592 connected to the idler wheel support plate 570. Yes.

  When the operator lifts the seedling transplanter 1 up to the maximum height, one end 591 and the other end 592 of the dead-spring tension spring 590 are provided with the support pin 571 as shown in FIG. At the same time that the dead center is exceeded with respect to the shaft core of the spring stay 564, the rotation fulcrum 563 of the spring stay 564 is connected to a position that exceeds the dead center.

  Thereby, when an operator lifts up the seedling transplanter 1 to the maximum height (see FIG. 22), the force necessary to push down the steering handle 8 can be reduced.

  In the configuration shown in FIGS. 21 and 22, the case where the spring stay 564 also exceeds the dead center with respect to the rotation fulcrum 563 has been described. However, the present invention is not limited to this. The one end 591 of the spring 590 may be directly connected to the driven wheel support plate 560. Even in this case, when the operator lifts the seedling transplanter 1 up to the maximum height, the operator assists the depression of the steering handle 8.

  Further, in the configuration shown in FIGS. 19 to 22, the traveling transmission case 60 is rotatable about the input shaft 61 and the drive shaft 510 of the crawler traveling device is attached to the output shaft 62. Although described above, the present invention is not limited to this. For example, the input shaft 61 may include an input / output shaft that also serves as the output shaft 62. That is, in this case, the crawler traveling device is rotatable about the input / output shaft, and the drive wheels of the crawler traveling device are attached to the input / output shaft.

  In addition, the 1st idler wheel 531 and the 2nd idler wheel 532 of this Embodiment are examples of the roller of this invention. Further, the output shaft 62 of the present embodiment corresponds to an example of the axis of the drive wheel of the present invention. The driven wheel support plate 560 of the present embodiment is an example of the first member of the present invention, and the idle wheel support plate 570 of the present embodiment is an example of the second member of the present invention. Further, the dead-center surpassing tension spring 590 of the present embodiment is an example of the tension spring of the present invention. Further, the axis of the support pin 571 of the present embodiment is an example of the swing fulcrum of the present invention.

  In addition, although the said embodiment demonstrated the case where the one driven wheel shaft 521 was provided, it does not restrict to this, For example, by providing two or more driven wheel shafts, two or more driven wheels are provided. The structure may be different.

  In the above embodiment, the case where the first idler wheel shaft 531a and the second idler wheel shaft 532a are provided has been described. However, the present invention is not limited to this. For example, by providing three or more idler wheel shafts, The structure which provided three or more rings may be sufficient.

  Further, in the above embodiment, the driven wheel support plate 560 is connected and fixed to the traveling transmission case side support plate 550 through the elongated hole 561, and the idler wheel support plate is further connected to the driven wheel support plate 560. The configuration in which the 570 is rotatably connected via the support pin 571 has been described. However, the configuration is not limited thereto, and for example, the traveling transmission case has a shape that extends rearward and the rear end of the traveling transmission case. The drive wheel of the crawler traveling device is attached to the output shaft provided in the section, and a plurality of idler wheels are supported by another idler wheel support plate that is rotatably connected around the output shaft. A configuration in which a crawler is wound around the drive wheels and the plurality of idler wheels may be employed.

Further, for example, in the fourth crawler traveling device 4500 shown in FIG. 23, the support pins 571 of the first idler wheel 531 and the second idler wheel 532 are attached to the swing frame 810 to swing. The frame 810 forms a link structure with a rod 820 whose tip is rotatably connected to a lower end portion 15a (see FIG. 19) of the traveling vehicle body 15 and a crawler frame 830 whose tip is fixed to the traveling transmission case 60. You may do it. By forming the link structure, the first idler wheel 531 and the second idler wheel 532 are supported in accordance with the vertical rotation of the crawler frame 830 accompanying the rotation of the traveling transmission case 60 around the input shaft 61. The position of the pin 571 can be changed.
FIG. 23 is a schematic left side view illustrating the configuration of the fourth crawler traveling device 4500.

  Furthermore, as shown in FIG. 23, the distance La between the first fulcrum points of the first rotation fulcrum 830a of the crawler frame 830 on the swing frame 810 side and the second rotation fulcrum 820a of the rod 820 on the swing frame 810 side. Is narrower than the distance Lb between the second fulcrum points of the axis of the input shaft 61, that is, the third rotation fulcrum 830 b of the crawler frame 830 and the fourth rotation fulcrum 820 b of the rod 820 on the lower end 15 a side of the traveling vehicle body 15. It may be configured. As a result, when the seedling transplanter 1 is lifted up, the positions of the support pins 571 of the first and second freewheels 531 and 532 move rearward, so that there is little change in the front and rear wheel balance.

For example, in the fifth crawler traveling device 5500 shown in FIG. 24A, the second driven wheel support plate 1560 to which the driven wheel 520 is rotatably attached, and the first embodiment are not limited to the above embodiment. A configuration using a rack and a pinion gear may be used to attach the idler wheel 531 and the second idler wheel 532 to the second idler wheel support plate 1570 rotatably attached.
FIG. 24A is a schematic left side view showing the configuration of the fifth crawler traveling device 5500, and FIG. 24B is an explanatory diagram for explaining the mathematical formula. Note that α in FIGS. 24A and 24B is the center position in the front-rear direction of the rotation center of the drive wheel 510 and the crawler grounding surface 540a with reference to the horizontal line 512 passing through the rotation center of the drive wheel 510. It is an angle between the auxiliary line 513 and the central ground point 540a1. Further, the point O in FIG. 24B corresponds to the rotation center of the driving wheel 510, and the point Pα is a central ground point 540a1 in a state where the fifth crawler traveling device 5500 is not lifted up by the angle θ. Correspond. Further, the point Pθ corresponds to the center contact point 540a1 when the fifth crawler traveling device 5500 is lifted up by the angle θ. The distance between the O point and the Pα point is L, and the distance between the O point and the Pθ point is L.

That is, as shown in FIG. 24A, a rack portion 1565 is formed at the lower end edge portion of the second driven wheel support plate 1560, and the upper end edge portion of the second idler wheel support plate 1570 is formed. A pinion gear portion 1575 is formed at a position where it meshes with the rack portion 1565. The gear teeth of the pinion gear portion 1575 are arranged on an arc having a radius R centering on a second support pin 1571 standing on the second idler wheel support plate 1570. In addition, a support plate 1566 having a long hole 1566a for movably supporting the second idler wheel support plate 1570 is fixed to the rack portion 1565 of the second driven wheel support plate 1560.
A second support pin 1571 is slidably inserted into the long hole 1566a, and a drop prevention pin (not shown) is attached to the tip.

  Further, the radius R of the gear tooth tip of the pinion gear portion 1575 is determined by the amount of front-rear shift of the center grounding point 540a1 in the front-rear direction of the crawler grounding surface 540a when the second driven wheel support plate 1560 is lifted up. The front-rear correction amount when the wheel 531 and the second idler wheel 532 are rotated is set to be the same.

  In other words, according to this configuration, when the second driven wheel support plate 1560 is lifted up, the meshing portion between the rack portion 1565 and the pinion gear portion 1575 moves rearward, so that the first idler wheel 531 and the second idler wheel 531 move. The wheel 532 moves backward. Since the rearward movement amount (correction amount L2) and the forward movement amount (deviation amount L1) of the center contact point 540a1 of the crawler contact surface 540a coincide with each other, the second driven wheel support plate 1560 is lifted. Even if it is increased, the position of the center grounding point 540a1 of the crawler grounding surface 540a does not change.

  Here, with reference to FIG. 24 (b), how to set the radius R of the gear tip of the pinion gear portion 1575 will be described using mathematical expressions.

  When the fifth crawler traveling device 5500 is lifted up by an angle θ, that is, when the second driven wheel support plate 1560 is lifted up by an angle θ, the shift amount of the central ground contact point 540a1 in the front-rear direction of the crawler ground contact surface 540a L1 (see FIG. 24B) is expressed by the following equation (1).

L1 = Lcos α−L cos (α + θ) (Equation 1)
On the other hand, the correction amount L2 due to the rearward movement of the meshing portion of the rack portion 1565 and the pinion gear portion 1575 is expressed by the following equation (2).

L2≈2πRθ / 360 (Equation 2)
Here, if the following equation (3) holds, the shift amount of the center grounding point 540a1 becomes small or becomes zero.

L1 = L2 (Equation 3)
Therefore, the following expression (4) is obtained based on (Expression 1) to (Expression 3).

Lcos α−L cos (α + θ) = 2πRθ / 360 (Formula 4)
When (Equation 4) is solved for R, the following equation (5) is obtained.

R = (Lcos α−L cos (α + θ)) 360 / 2πθ (Equation 5)
The radius R can be set by the above (Formula 5).

  In the above embodiment, when the operator performs the tread adjustment of the second crawler traveling device 2500 on the left side and the second crawler traveling device on the right side (not shown) of the seedling transplanter 1 using FIG. The configuration in which the front side pipe member 2551 and the rear side pipe member 2552, the front side slide shaft 361 and the rear side slide shaft 362 are fitted, inserted, slid and positioned at a desired position, and then fixed with bolts 2555 has been described. . Here, in order to facilitate the operation of tightening or loosening the bolt 2555 from the side surface of the second crawler traveling device 2500, the second traveling power transmission case side support plate 2550 is reversed in a side view. The configuration is bent into a shape. Thereby, since the bolt 2555 can be seen from the side, the operation can be easily performed.

  In the above embodiment, the case where the driven wheel 520, the first idler wheel 531 and the second idler wheel 532 (see FIG. 19) have the same configuration as the conventional one has been described. For example, the configuration shown in FIGS. 25A and 25B may be used. FIG. 25A is a perspective view of an improved roller 6500 that can be applied to the crawler traveling device described in the above embodiment, and FIG. 25B shows that the improved roller 6500 is mounted on the crawler traveling device. It is a schematic side view which shows the state made.

  That is, as shown in FIG. 25 (a), the improved type roller 6500 has a circular outer shape, and a circumferential portion of a wheel plate 6510 in which a through hole 6511 for inserting and fixing a rotation shaft is formed at the center. 8 pin members 6512 are erected at an equal interval and retrofitted. As a result, the improved type wheel 6500 can be reduced in weight as compared with the conventional wheel.

  Further, the eight pin members 6512 are configured to reliably fit into the valleys 542 of the mountain-shaped convex portions 541 that are continuously formed on the inner peripheral surface of the crawler 540. In other words, the chevron-shaped convex portion 541 is securely fitted between the adjacent pin members 6512. As a result, when the crawler 540 is rotated by the drive wheel 510 (see FIG. 19), the mountain-shaped convex portion 541 moves in the forward or backward direction, so that the improved roller 6500 is reliably rotated without slipping. To do.

  Moreover, in the said embodiment, although the seedling planting apparatus 300 which rocks the planting tool 11 up and down was mainly demonstrated using FIG. 10, it is not restricted to this, For example, the 2nd seedling planting apparatus 1700 shown in FIG. Thus, as in the case of the seedling planting device 300, the planting tool 11 may be configured to swing up and down and move back and forth.

  Here, FIG. 26 is a left side view showing a schematic configuration of the second seedling planting apparatus 1700. Components having basically the same functions as those described in the above embodiment are given the same reference numerals, and descriptions thereof are omitted.

  That is, as shown in FIG. 26, the second seedling planting apparatus 1700 includes a planting tool 11 and a second vertical movement mechanism 1710 that moves the tip of the planting tool 11 up and down and in the front-rear direction in a stationary locus. (See locus T1 in FIG. 1).

  The second vertical movement mechanism 1710 includes a first cam 1750 that is connected and fixed to the upper link 1720, the lower link 1730, the connecting member 1740, and the vertical movement arm drive shaft 440 (see FIG. 10) from the back side. And a second cam 1760.

  The upper end of the upper link 1720 is rotatably attached to the upper side of the left side surface of the casing 401 (see FIG. 10) that houses the seedling planting device drive mechanism 400 via the upper link rotation shaft 1721. . The front end of the lower link 1730 is freely rotatable to the lower side of the left side surface of the casing 401 (see FIG. 10) housing the seedling planting device drive mechanism 400 via the lower link rotation shaft 1731. Is attached.

  Further, the upper end portion of the connecting member 1740 is rotatably connected to the rear end portion of the upper link 1720 via the upper connecting shaft 1741. Further, a connecting pin 1732 erected at the rear end portion of the lower link 1730 is inserted into the substantially arc-shaped elongated hole 1742 provided at the lower end portion of the connecting member 1740, and slides in a substantially front-rear direction. Connected as possible.

  In FIG. 26, the configuration in which the long hole 1742 is formed on the connecting member 1740 side is described. However, the present invention is not limited to this. For example, the long hole 1742 is formed at the rear end portion of the lower link 1730. In addition, a connection pin 1732 may be erected at the lower end of the connection member 1740.

  Further, the planting tool 11 is fixed to the connecting member 1740.

  Further, an upper roller 1722 is rotatably attached in the middle of the upper link 1720, and the upper roller 1722 is configured to rotate while always in contact with the outer peripheral surface of the second cam 1760. Further, a lower roller 1733 is rotatably attached to the middle of the lower link 1730, and the lower roller 1733 is configured to rotate while always in contact with the outer peripheral surface of the first cam 1750.

  Further, the upper link 1720 and the lower link 1730 are connected by a lower link tension spring 1770 and are configured to be biased toward the side where the interval between the upper link 1720 and the lower link 1730 is narrowed.

  Further, as shown in FIG. 26, a pair of left and right heel members 1780 are attached to the distal ends of the left hopper portion 1011L and the right hopper portion 1011R of the planting tool 11, respectively.

  With the above configuration, by fixing the first cam 1750 and the second cam 1760 having different shapes to the vertical movement arm drive shaft 440, the upper link 1720 and the lower link 1730 can be moved up and down uniaxially.

  Further, by changing the shape of the first cam 1750 or the second cam 1760, the trajectory T1 can be freely changed.

  Further, since the upper link 1720 and the lower link 1730 are forcibly moved up and down by two different cams according to the above configuration, the upper link 1720 and the lower link 1730 can be moved up and down reliably even at high speed planting. I can do it. Moreover, even in the case of high speed planting, torque is not wasted compared to the conventional case.

  Further, by changing the outer shape of the first cam 1750 and the second cam 1760, the distance between the upper link 1720 and the lower link 1730 is changed, and the elongated hole 1742 is slid to move the planting tool 11 back and forth. It can be made.

  Further, by providing the long hole 1742, when an overload is applied during planting work, the long hole 1742 can be slid to escape.

  In addition, since the lower end portion of the connecting member 1740 to which the planting tool 11 is fixed is connected to the lower link 1730 through the long hole 1742 at the start of the movement from the stop position of the planting operation, the lower side There is less impact than when fully connected to the link 1730.

  Moreover, according to the said structure, when the planting tool 11 descend | falls, the planting tool 11 can be shaken back by sliding the long hole 1742. FIG.

  As a result, the basic trajectory (static trajectory) is a circular arc, and if only the descending process is swung later, the lower side of the moving trajectory becomes V-shaped.

  Further, when the planting tool 11 descends, the weight of the planting tool 11 and the lower link 1730 is supported by pulling the lower link tension spring 1770 while making the elongated hole 1742. Assist the ascent of the planting tool 11 and the lower link 1730.

  In addition, since the rod member 1780 is attached to the distal ends of the left hopper portion 1011L and the right hopper portion 1011R, when the rod member 1780 hits the surface of the rod U, the long hole 1742 slides and the planting tool 11 descends. Therefore, the planting depth is constant.

  Further, by making the amount of backward movement of the tip of the hopper through the long hole 1742 the same as the traveling speed at the time of planting work, even if the descending of the planting tool 11 is stopped using the rod member 1780, Do not drag the tip of the hopper that has entered U.

  In the seedling transplanter 1 of the above embodiment, a sensor plate 710 for maintaining a planting depth of the seedling 22 included in the planting depth adjusting mechanism 700 described mainly with reference to FIG. 14 (FIG. 14), a grounding roller (not shown) for detecting the distance the seedling transplanter 1 has actually traveled may be provided. In this case, a pair of left and right support arms that support the rotating shaft of the ground roller at both left and right ends are arranged upward, and the ground roller is prevented from falling too much on the inner side surface of the pair of left and right support arms. Protrusions may be arranged to face each other. These protrusions arranged oppositely contact the upper edge of the arm portion extending in the front-rear direction of the depth arm 720 (see FIG. 14) or the sensor plate 710 from the upper side to prevent the ground roller from falling too much. is there.

Moreover, it is good also as a structure which waters water on the surface of a grounding roller from the upper direction of the said grounding roller.
Thereby, even when the multi-film is laid in advance on the heel U, the grounding roller becomes difficult to slide on the surface of the multi-film, and the distance that the seedling transplanter 1 has actually traveled can be reliably detected.

  In the above case, the position where water is applied to the ground roller may be configured to apply water at a high pressure toward the center axis of the ground roller. As a result, mud adhering to the grounding roller can be removed, and the gripping force (hardness to slip) of the grounding roller on the surface of the multi-film can be recovered.

  Further, the portion to which water is applied may be configured to be slightly forward of the center axis of the ground roller. This assists the rotation of the ground roller.

  In addition, a configuration (for outdoor use) in which a plurality of plates curved in an arc shape in a side view is arranged in a water wheel shape at equal intervals on the entire circumferential surface of the cylindrical ground roller. Here, the arc-shaped plate is disposed so that the arc portion is in contact with the flange surface in the forward rotation. As a result, the grounding roller has a shape that covers the soil, and thus rotates more reliably.

  In the above embodiment, the case where the sprocket brake 511 is provided on the drive wheel 510 has been described. However, the present invention is not limited thereto, and for example, a configuration in which the sprocket brake 511 is not provided may be used.

  In the above embodiment, seedlings such as vegetables have been described as transplants. However, the present invention is not limited to vegetables, and any transplants that can be taken out by a take-out device and planted in a field with a planting tool. Also good.

  Moreover, although the said embodiment demonstrated the case where the engine 12 was mounted as an example of a working vehicle and the driving force from the said engine 12 was transmitted to the crawler traveling apparatus 500 etc., it is not restricted to this, For example, an engine is used. Instead, a configuration in which a motor or the like is mounted and the driving force from the motor or the like is used may be used.

  Moreover, although the said embodiment demonstrated the structure provided with the driven front wheel 2 and the crawler traveling apparatus as an example of a working vehicle, it is not restricted to this, For example, the structure which does not include the driven front wheel 2 but travels only with a crawler traveling apparatus. It may be.

  In the above embodiment, as an example of the work vehicle, a configuration has been described in which the driven front wheel 2 as a wheel is provided on the front side of the traveling vehicle body 15, and the crawler traveling device is provided on the rear side of the driven front wheel 2. For example, the wheel may be provided on the rear side of the crawler traveling device, and the crawler traveling device may be provided on the front side of the wheel.

  Further, in the above embodiment, a case has been described in which the front guard 1210F that covers the front V-shaped notch 1200F from the inside and the rear guard 1210B that covers the rear V-shaped notch 1200B from the inside are provided. For example, the front guard that covers the front V-shaped notch 1200F from the outside and the rear guard that covers the rear V-shaped notch 1200B from the outside may be provided. The V-shaped notch may be covered from the outside and the other V-shaped notched may be covered from the inside. Thereby, the volume in the hopper formed by the pair of left and right hopper portions 1011L and 1011R of the planting tool can be secured.

  In the above-described embodiment, a configuration has been described in which both the front V-shaped notch portion 1200F and the rear V-shaped notch portion 1200B are covered with the front guard and the rear guard. The structure which covers any one of the part 1200F or the back V-shaped notch part 1200B may be sufficient.

  Moreover, although the said embodiment demonstrated the case where the substantially V-shaped notch part was provided in the end surface part mutually opposed of the hopper part divided into right and left, it is not restricted to this, For example, The shape of the notch may be any shape such as a substantially U shape, a substantially long hole shape, a substantially rectangular shape, or a substantially rhombus shape.

  Further, in the above-described embodiment, the front end surface portion of the hopper portion divided into two on the left and right sides is notched with both the right hopper portion and the left hopper portion, and In the rear end surface portion of the hopper portion divided into two, the description has been given of the case where the notch portions are formed in both the right hopper portion and the left hopper portion, but not limited thereto, for example, An example of a notch is formed in one of the right hopper and the left hopper at the front end face of the hopper divided into two parts on the left and right sides, and two on the left and right An example of a notch is formed on either the right hopper or the left hopper at the rear end surfaces of the separated hoppers that are abutted against each other. And it may be. Moreover, the structure by which the notch part is not formed in any of the site | parts mutually faced of the right hopper part and the left hopper part may be sufficient.

  In the above-described embodiment, the front and rear end surfaces where the left hopper portion 1011L and the right hopper portion 1011R face each other have a substantially V-shaped front V-shaped notch portion 1200F and a substantially V-shaped shape. Although the configuration in which the rear V-shaped notch portion 1200B is provided has been described, the present invention is not limited to this, and for example, a substantially V-shaped notch portion is provided on one of the front and rear end surfaces. It may be a configuration.

  Moreover, in the said embodiment, although the planting tool demonstrated the case provided with the hopper part divided into right and left, it is not restricted to this, For example, the hopper part into which the planting tool was divided into two front and back The structure provided with may be sufficient.

  Moreover, in the said embodiment, although the taking-out apparatus 200 took out the seedling from the seedling pot 21 of the tray 20, and supplied to the planting tool and planted in the farm field, although it demonstrated, it was not restricted to this For example, an operator puts a seedling into a plurality of pots provided on a rotary table by hand, and the seedling falls by opening and closing a member having a lid function provided on the bottom side of the pot. The present invention can also be applied to a seedling transplanter of a type supplied to a planting tool.

  Moreover, in the said embodiment, the return operation | movement of the tray feed rod 121 is started after the extraction member 260 rushes into the seedling pot 21, and is completed immediately before the extraction member 260 comes out of the seedling pot 21. However, the present invention is not limited to this. For example, the return operation of the tray feed rod 121 is started and completed in any period from when the take-out member 260 enters the inside of the seedling pot 21 until it comes out. All you have to do is

  Moreover, although the said embodiment demonstrated the structure which performs the planting operation | movement of the planting tool 11 intermittently, it is not restricted to this, For example, the structure which plants a seedling between stocks of a fixed space | interval may be sufficient.

  In the above embodiment, seedlings such as vegetables have been described as transplants. However, the present invention is not limited to vegetables, and any transplants that can be taken out by a take-out device and planted in a field with a planting tool. Also good.

  In the above embodiment, the configuration in which the scraper 1510 of the scraper device 1500 is provided behind the second planting tool 2011 has been described. However, the present invention is not limited to this. For example, the scraper 1510 is provided in front of the planting tool. It may be done. The scraper in that case may be configured to enter the inside of the second planting tool 1011 from the front V-shaped notch 1200F of the second planting tool 2011, for example.

  In the above-described embodiment, the scraper device 1500 is attached to the second planting tool 2011 and the scraper cam 1530 disposed so as to be in contact with the scraper arm 1520 is provided. In short, the scraper moves to the front side or the rear side by the operation of the scraper arm together with the planting tool that rises while opening the tip, and scrapes the outer surface of the planting tool. Any configuration may be employed as long as it enters the inside of the attachment and scrapes the inner surface of the planting attachment.

  Further, in the above-described embodiment, the configuration has been described in which the push rod 281 protrudes slightly before the push position 273a1 between the position K3 and the position K4 (see FIG. 9). The rod 281 may be configured to protrude slightly before the push-out position 273a1 between the position K1 and the position K4 (see FIG. 9).

  The transplanting machine according to the present invention has an effect that the strain can be adjusted with a simpler structure than the conventional one, and is useful as a fully-automatic seedling transplanting machine for taking out seedlings from the pot portion of the tray and planting them in the field.

DESCRIPTION OF SYMBOLS 15 Traveling vehicle body 20 Tray 21 Seedling pot 22 Graft 100 Tray supply apparatus 110 Seedling stage 122 Support axis 200 Extraction apparatus
260 extractor
281 Extruder
1510 scraper
1520 scraper arm
1530 scraper cam
1550 tension spring
2011 planting hopper

Claims (6)

In a transplanter provided with a planting tool (11) for planting a transplant (22) and a planting drive mechanism (400) for intermittently operating the planting tool (11) in a traveling vehicle body (15),
The planting drive mechanism (400) includes a planting clutch (420) for turning on and off the transmission to the planting tool (11) and a rotatable cam provided on the transmission downstream side of the planting clutch (420). Element(
441), a regulating member (460) for turning off the movement of the planting clutch (420) based on the shape of the cam member (441), and the planting clutch (460) by moving the regulating member (460) 420) including a driving device (1400) for turning the cutting state of 420) to the on state,
The drive device (1400) includes a biasing member (1420) that biases the regulating member (460) in a direction in which the planting clutch (420) is engaged, and the regulating member (460) is pre-planted. A stopper (140) that restricts movement in the direction to put the clutch (420) in the engaged state, and an actuator (1440) that switches the restriction by the stopper (1430) between an active state and a non-active state,
By actuating the actuator (1440) and switching the stopper (1430) from the working state to the working state, the restriction member (460) is restricted from moving in the direction in which the planting clutch (42) is engaged. The transplanting machine is configured to be released and the transplanting clutch (420) shifts from a cut state to an on state.   The transplanter according to claim 1, further comprising a back plate (1460) for restricting the movement of the stopper (1430) at a predetermined position and guiding the stopper in the moving direction.   Between the actuator (1440) and the stopper (1430), an interchange mechanism (1450) that allows the stopper (1430) to be manually switched from the working state to the working state regardless of the operation of the actuator (1440). The transplanter according to claim 2, wherein the transplanter is provided. A planting hopper (2011) for planting the implant (22) is provided, and the planting hopper (211) is a cylindrical member with a sharp tip, and the tip opens and closes in the left-right direction while moving up and down.
A scraper (1510) for scraping the outer surface and the inner surface of the planting hopper (2011) is provided in front of or behind the planting hopper (2011),
A scraper mounting portion for mounting the scraper (1510) is provided on the lower end side, and the upper end side is rotatable back and forth on a fulcrum shaft (122) positioned above the planting hopper (2011) in a side view. A scraper arm (1520) to be connected is provided,
The scraper (1510) moves to the front side or the rear side when the scraper arm (1520) rotates together with the planting hopper (201) that rises while opening the tip, and the outer surface of the planting hopper (2011). And then scraping the inner surface of the planting hopper (2011) by entering the planting hopper (2011). A tray supply device (100) for providing a tray (20) having a plurality of seedling pots (21) containing the transplant (22), and a plant for taking out the transplant from the seedling pot (21) and planting the transplant A take-out device (200) for feeding to the attached hopper (11, 2011),
The take-out device (200) includes a take-out tool (260) that enters the floor of the seedling pot (21) to take out and hold the transplant, and the transplant that the take-out tool (260) holds. And an extruding tool (281) for feeding the implant to the planting hopper (11, 2011), and after the extracting tool (260) has taken out the implant, the extruding tool (281) When the implant (281) supplies the implant to the attached hopper (11, 2011), when the pusher (281) supplies the implant to the attached hopper (11, 2011), the pusher (281) pushes the implant forward. The transplanter according to any one of claims 1 to 4, further moving to release the implant. A pair of left and right crawler travel devices (3500) having a drive wheel (510), front and rear wheels (531, 532) and a roller (540) arranged on the ground side, and an axis of the drive wheel (10) ( 62), or a support that supports the rotating wheels (531, 532) arranged at the front and rear of the input shaft (61) for driving the driving wheel (510) so as to be rotatable up and down. Members (560, 570, 590),
The support member (560, 570, 590) includes a first member (560) arranged to be movable around the shaft core (61, 62), and a rolling wheel (531, 53) arranged in the front-rear direction. , And a second member (570) rotatably connected to the first member (560) at a swing fulcrum (571), and one end connected to the first member (560). A tension spring (590) connected to the second member (570) at the other end,
While the support member (560, 570, 590) rotates about the shaft core (61, 62) in the direction in which the body lifts up, the tension spring (590) moves the swing fulcrum (571). The planter according to any one of claims 1 to 5, wherein the dead center is exceeded.

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