JP2018014967A - Transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transplanter capable of moving a seedling held by a take-out device to a planting tool without damaging the seedling and reliably moving a tray in an amount for one row.SOLUTION: A transplanter includes: a conveyance device 100 conveying a tray 20 where a seedling 22 is planted; a take-out device 200 taking out the seedling 22 from the tray 20 moved to a predetermined position by the conveyance device 100; and a planting tool 11 planting the seedling 22 taken out by the take-out device 200 to a field. The take-out device 200 comprises: take-out members 261L, 261R taking out from the tray 20 and holding the seedling; and a press-out member 281 pressing out the seedling held by the take-out members 261L, 261R to the planting tool 11. The press-out member 281 includes a loop part 281b surrounding an outer periphery of the take-out members 261L, 261R.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a seedling transplanter and belongs to the technical field of agricultural machinery.

  Conventionally, it has a tray transfer device that moves a tray on which a plurality of seedlings have been cultivated, and a takeout device that takes out the seedlings from the tray that the tray transfer device moves with the left and right extraction claws. It is known that when it is carried above the implement, the seedling extrudate that moves between the left and right of the extraction claw spreads the distal end side of the extraction claw in the left-right direction and moves the seedling to the planting implement. (See Patent Document 1).

  In addition, the tray transfer device moves the transfer unit for stacking the tray in the left-right direction, and when the left and right rows of seedlings are taken out from the tray, the tray moves to the lower side in the transfer direction. This movement is performed by moving the tray feed rod into and out of the space between the pot portions where the seedlings grow on the back surface of the tray along a predetermined locus.

  Specifically, when the seedlings for the left and right rows are taken out from the tray, the tray feed rod pushes the tray downward in the transport direction while retracting downward from the back surface of the tray, and moves one row before and after the next pot portion. A tray feed rod enters the space and regulates the movement of the tray.

Japanese Patent Laying-Open No. 2015-159762

  However, the seedling extrudate of the conventional transplanter moves between the left and right of the extraction claw and pushes out the seedling, and has a shape that passes above the left and right extraction claw at the tip in order to reliably extrude the seedling. . Moreover, since the range which contacts when a seedling is pushed out is wide, there is a problem that the seedling is damaged by the contact, the growth failure occurs, or the planted seedling dies.

  In addition, the seedling extrudate is formed by bending and cutting a metal plate, and is relatively heavy. Therefore, when the seedling extrudate is moved to extrude the seedling, if the corresponding driving force is not secured, it will move. There is a problem that the seedling cannot be pushed out at an appropriate timing, the seedling does not enter the planting tool, and the seedling cannot be planted.

  The tray is configured to move by one row by the tray feed rod when the left and right seedlings are taken out, but the tray moves a distance of one row or more due to the weight of the seedling or the vibration of the machine body, and the takeout device is There is a problem that a seedling cannot be taken out at an appropriate position and a seedling is not planted.

  In order to solve this problem, a brake arm is provided to contact the moving tray to attenuate the moving force and prevent the tray from moving significantly.If the brake arm is too effective, the tray will There is a problem that a stop occurs on the upper side in the moving direction from the take-out position, and the take-out device cannot take out the seedling at an appropriate position, and a place where the seedling is not planted is generated.

  In view of the problems of the conventional transplanter, the present invention provides a transplanter that can be moved to a planting tool without damaging the seedlings held by the take-out device and that can reliably move the tray by one row. The purpose is to provide.

  The invention of claim 1 includes a conveying device (100) for conveying a tray (20) on which a seedling (22) is vegetated, and a seedling (22) from the tray (20) moved to a predetermined position by the supply device (100). In the transplanting machine provided with the take-out device (200) for taking out the seedlings and the planting tool (11) for planting the seedling (22) taken out by the take-out device (200) in the field, the take-out device (200) has the tray ( 20) comprising a take-out member (261L, 261R) for taking out and holding the seedling from the extruding member (261L, 261R) and an extruding member (281) for pushing out the seedling held by the take-out member (261L, 261R) to the planting tool (11), The pushing member (281) is a transplanter having a loop portion (281b) surrounding the outer periphery of the extraction member (261L, 261R).

  In the invention of claim 2, the extrusion member (281) is formed of a wire, and the loop portion (281b) has one end portion of the extrusion member (281) in the short direction of the extraction member (261L, 261R). An outer peripheral portion is formed so as to be wound, and an end portion of the winding portion of the loop portion (281b) is located on a surface different from the holding action surface of the seedling (22) of the extraction member (261L, 261R). The transplanter according to claim 1, wherein:

  The invention of claim 3 is provided with an extrusion moving member (283) for reciprocating the extrusion member (281) along the longitudinal direction of the take-out member (261L, 261R), and the extrusion movement member (283) is provided with a mounting shaft. (282), the mounting shaft (282) is provided with a base portion of the pushing member (281), and the base portion of the pushing member (281) is plural times so as to surround the outer periphery of the mounting shaft (282). The transplanter according to claim 2, wherein the coil part (281a) is formed by winding.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the push-out member (281) is disposed so as to pass above in the longitudinal direction of the take-out member (261L, 261R). The transplanter described.

  According to a fifth aspect of the present invention, the transport device (100) moves the tray (20) every predetermined distance and moves the tray (20) when the take-out device (200) takes out the seedling. A tray moving member (121) to be regulated and a movement regulating member (180L, 180R) for attenuating the moving force of the tray (20) to stop at a predetermined position are provided, and interlocked with the operation of the conveying device (100). The movement restriction member (180L, 180R) includes an interlocking restriction member (183L, 183R) that switches between the operating state and the non-operation state, and the interlocking restriction member (183L, 183R) includes the movement restriction member (180L, 180R). The transplanter according to any one of claims 1 to 4, characterized in that an attenuation reduction portion (185L, 185R) for weakening the damping action of the moving force is formed. .

  According to a sixth aspect of the present invention, the tray moving member (121) is configured to move along a predetermined locus in conjunction with the conveyance of the tray (20) of the conveying device (100), and is on the side of the tray moving member (121). The transplanter according to claim 5, wherein a side plate (111a) is provided on the side, and a rail (121r) is formed on the side plate (111a) along a movement locus of the tray moving member (121).

  According to the invention of claim 1, when the loop portion (281b) pushes out the seedling by the loop portion (281b) of the extrusion member (281) surrounding the outer periphery of the extraction member (261L, 261R), the extraction member (261L, 261R) can remove foreign matters such as soil, so that the foreign matter attached to the take-out members (261L, 261R) cannot enter the tray (20) and the seedlings are not taken out. It is prevented that the part which cannot be planted generate | occur | produces.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the weight of the extrusion member (281) can be reduced by configuring the extrusion member (281) with a wire. The movement of 281) becomes smooth, the seedling can be moved to the planting tool (11) at an appropriate timing, and the seedling planting accuracy is improved.

  Further, the end of the winding portion of the loop portion (281b) is positioned on a different surface from the holding action surface of the seedling (22) of the extraction member (261L, 261R), so that the end portion of the extrusion member (281) The pointed portion does not come into contact with the seedling (22), the seedling is prevented from being damaged, and the growth of the seedling is stabilized.

  According to the invention of claim 3, in addition to the effect of the invention of claim 2, the coil portion (281a) is formed at the base portion of the push member (281) to be mounted on the mounting shaft (282) of the push moving member (283). Thus, when the loop portion (281b) moves along the longitudinal direction of the extraction members (261L, 261R), the amount of movement in the left-right direction on the base side of the extrusion member (281) can be suppressed, so the extrusion member (281 ) Is prevented from changing, and the operation of the extraction members (261L, 261R) is not hindered, and the seedling (22) can be reliably removed from the tray (20) and moved to the planting tool (11). it can.

  According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, the pushing member (281) is disposed so as to pass over the longitudinal direction of the extraction members (261L, 261R). Thus, the pushing member (281) serves as a guide that prevents the falling member (261L, 261R) from coming into contact with the upper part of the seedling (22) held by the take-out member (261L, 261R). The posture of (22) is maintained, and the seedling (22) is put into the planting tool (11) in a posture suitable for planting, and the seedling planting accuracy is improved.

  According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 4, by taking out the moving force of the tray (20) by the movement restricting member (180L, 180R), the take-out device ( 200) can reliably stop the tray (20) at the position where the seedling (22) is taken out, so that the picking device (200) is prevented from failing to take out the seedling (22) from the tray 820), and the seedling is Surely planted. Thereby, an operator does not generate an operation for planting a seedling in a place where the seedling has not been planted, and the labor of the operator is reduced.

  Further, since the attenuation reducing portion (185L, 185R) is formed on the interlocking regulating member (183L, 183R), the tray (20) is located on the upper side in the moving direction from the position where the takeout device (200) takes out the seedling (22). Therefore, the take-out device (200) is prevented from failing to take out the seedling (22) from the tray (20), and the seedling is reliably planted in the field. Thereby, an operator does not generate an operation for planting a seedling in a place where the seedling has not been planted, and the labor of the operator is reduced.

  According to the invention of claim 6, in addition to the effect of the invention of claim 5, by forming the rail (121r) along the movement locus of the tray moving member (121) on the side plate (111a), the tray moving member (121 ) Can be prevented from moving from a position that deviates from the movement trajectory optimal for the movement of the tray (20), the tray (20) can be moved to a position where the take-out device (200) takes out the seedling (22). .

Left side view of seedling transplanter Top view of seedling transplanter (A) Schematic cross-sectional view of the center part of the planting tool cut from a plane parallel to the longitudinal direction of the body and perpendicular to the ground, and (b) the central part of the planting tool in the lateral direction of the body Is a schematic cross-sectional view as viewed from the back side of a plane cut parallel to the ground and perpendicular to the ground, and (c) a perspective view of a rear guard arranged along the rear surface inside the planting tool as viewed from the left rear. (A) Perspective view of tray transport device, (b) Enlarged perspective view of main part of tray transport device Schematic side view showing the configuration of the tray vertical feed device (A) Schematic perspective view showing moving device of take-out device, (b) Main part plan view showing take-out device and extrusion device (A) Main part perspective view showing arrangement of take-out claw and push rod, (b) Main part plan view showing arrangement of take-out claw and push rod, (c) Front view of main part showing loop part of push rod 6A is a schematic side view of the take-out device when the lower right front side is viewed from the upper left back side in FIG. The schematic diagram which shows the rough correspondence of the rotation position of the seedling drive arm and the position on the locus of the tip of the pair of extraction claws in the extraction device Right side view of the tray conveyor showing the right brake arm Left side view of tray conveyor showing left brake arm An enlarged side view of the main part showing the rod rail of the tray feed rod Side view showing a water pump Top view showing the water pump Exploded view of valve plate of water pump

  Hereinafter, the seedling transplanter of the present invention will be described. 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.

  A seedling transplanting machine 1 for transplanting seedlings such as vegetables includes a traveling vehicle body 15 having a pair of left and right front wheels 2 and rear wheels 3 as traveling wheels, as shown in FIGS. A seedling planting device 300 that swings the planting tool 11 up and down to plant the seedlings 22 in the field, which is disposed at the rear of the traveling vehicle body 15 and the engine 12 and the transmission case (main transmission case) 4 disposed at the front. And a tray transfer device 100 for supplying the tray 20 containing the seedlings 22 and a take-out member 260 to the inside of the seedling pot 21 of the tray 20 of the tray transfer device 100 to take out the seedlings 22 and take out the seedlings 11. An extraction device 200 to be supplied to the plant, a planting depth adjusting mechanism including a sensor plate that keeps the planting depth of the seedling 22 constant, a pressure reducing wheel 13, a steering handle 8, and a central portion of the steering handle 8. Operation part It is configured to include a 00 or the like.

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

  That is, in the seedling transplanting machine 1, the power from the transmission case 4 is transmitted to the planting transmission device 18 to be taken out via the chain belt 202 in order to take out the seedling 22 from the seedling pot 21 and plant it on the buttocks of the field. While being transmitted to the apparatus 200, it is transmitted to the planting tool 11 through the seedling planting apparatus drive mechanism 400 attached to the planting transmission apparatus 18 and the seedling planting apparatus 300. The planting operation of the seedling transplanter 1 is intermittently performed by the seedling planting device drive mechanism 400.

  Further, as shown in FIG. 2, the tray conveyance device 100 is provided with a tray detection device 1100 that detects the presence or absence of the tray 20 on the tray conveyance path 111. The feeding operation of the tray conveying device 100 is such that the seedling placing table 110 is intermittently fed in the horizontal direction so that the seedlings in the seedling pots 21 corresponding to the horizontal row of the tray 20 are sequentially taken out by the taking-out member 260. After the operation and the extraction of the seedlings of all the seedling pots 21 for one horizontal row are completed, the tray 20 on the seedling table 110 is sent vertically by the tray feed rod 121 for one horizontal row of the seedling pots 21. There is a feed operation.

  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. 5), and the tray 20 is intermittently vertically fed along the tray conveyance path 111.

  As shown in FIGS. 1 and 2, a main frame 17 extending to the right side is provided at the rear of the left and right frames 16 disposed in the left and right direction at the rear end of the mission case 4. 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.

  Thereby, the worker can perform the steering operation of the traveling vehicle body 15 using the steering handle 8 while walking behind the traveling vehicle body 15.

  In other words, the seedling transplanting machine 1 moves the seedlings 22 accommodated in the tray 20 while advancing the traveling vehicle body 15 while straddling the heel U with the left and right front wheels 2, 2 and the left and right rear wheels 3, 3. It is the composition which is planted automatically on the upper surface of the

  The traveling unit is provided with a machine body control mechanism 50 that controls the posture and the vehicle height of the traveling vehicle body 15 by moving the left and right rear wheels 3 and 3 up and down relative to the traveling vehicle body 15. The airframe control mechanism 50 tilts the traveling vehicle body 15 left and right between the traveling transmission case 60 of the rear wheel 3 and the traveling vehicle body 15 and the hydraulic lifting cylinder 10 that raises and lowers the traveling vehicle body 15 by the vertical movement of the rear wheel 3. A horizontal hydraulic cylinder 14 is provided. When the hydraulic lift cylinder 10 is extended and contracted, the left and right rear wheels 3 move up and down relative to the traveling vehicle body 15 in the same direction and the traveling vehicle body 15 moves up and down. .

  As shown in FIGS. 1 and 2, a mission output shaft 4 a that outputs a driving force to the left and right rear wheels 3 projects from the left and right outer sides of the mission case 4. 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 toward the mission case 4 (FIG. 1). FIG. 2). 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 provided between the left connecting rod 9a and the swing arm 63a.

  The hydraulic elevating cylinder 10 is fixed to a hydraulic pressure switching valve portion 40 (see FIG. 1) provided at the upper portion of the mission case 4 and is provided in the switching valve portion 40 that switches oil supply from the hydraulic pump provided in the mission case 4. In addition, it is configured to operate by operating a lifting operation valve (not shown).

  Further, a pendulum-type left / right tilt sensor 41 is provided on the right side of the mission case 4, and the horizontal hydraulic cylinder 14 is operated via a horizontal operation valve (not shown) provided in the switching valve unit 40 by the detection of the left / right tilt sensor 41. In this configuration, only the left rear wheel 3 is moved up and down to maintain the traveling vehicle body 15 in the horizontal direction 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). As shown in FIGS. 3 (a) and 3 (b), the planting tool 11 includes a left hopper portion 1011L, a right hopper portion 1011R, a left hopper portion 1011L, and a right hopper that 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 portion 1011R and are detachably connected to open and close the front end sides of the left hopper portion 1011L and the right hopper portion 1011R, and the left hopper holder 1012L and the right hopper holder 1012L A holder holding frame 1013 that holds the hopper holder 1012R so as to be rotatable around a fulcrum shaft 1013a, one end and the other end are fixed to the front lower end of the left hopper holder 1012L and the right hopper holder 1012R, and the left hopper 1011L and Right hopper part 1011R A pair of left and right hoppers, which are fixed to the front upper ends of the left hopper holder 1012L and the right hopper holder 1012R and connected to the other end 352 of the open / close connecting cable 350. Open / close arms 1015L and 1015R.

  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. 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 left and right hopper portions 1011L and 1011R have a substantially cylindrical shape with a lower end pointed like a bowl in a closed state and an open upper end portion. 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 when viewed from the side (see FIG. 3A), obliquely downward toward the inner center of the planting tool 11. The extended flat plate portion is configured to substantially cover the front V-shaped notch portion 1200F in the rear view (see FIG. 3B).

  The rear guard 1210B has a left upper end 1210BL and a right upper end 1210BR fixed to 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. 3 (a)), a flat plate portion extending obliquely downward toward the inner center of the planting tool 11 is configured to substantially cover the rear V-shaped notch portion 1200B in the same manner as the front guard 1210F.

  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. Since the height of 1210BU 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, when the take-out device 200 supplies the seedling 22 to the planting tool 11, the seedling It is possible to prevent a part of 22 from coming into contact with the upper end edge 1210BU of the rear guard 1210B, and the seedling 22 can be supplied into the hopper accurately without being damaged.

  Next, the above-described tray conveyance device 100 will be further described mainly with reference to FIGS. 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 transport device 100 includes a seedling table 110 having a tray transport path 111 inclined downward to support the bottom of the tray 20, and a tray vertical feed device that intermittently feeds the tray 20 in the vertical direction along the tray transport 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.

  Further, as described above, the tray conveyance 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.

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

  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 device when it hits the movable portion 1141L or 1141R of 1140R. Upon receiving the signal, the control device sounds an alarm buzzer (not shown).

  The alarm buzzer is configured to sound for a predetermined 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 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.

  Further, when the tray detection device 1100 detects the absence of the tray 20 twice in succession, the alarm buzzer may sound for several seconds continuously, or whenever the absence of the tray 20 is detected, the solenoid In conjunction with 1440, the alarm buzzer may sound longer.

  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 of the tray vertical feeding device 120 of the tray conveying device 100 is resumed. 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, and thereafter The tray feed rod 121 is configured to move out from between the seedling pots 21 and move upward by one horizontal row of the seedling pots 21.

  The tray feed rod 121 is configured such that a central portion 121 a can enter and exit from a retreat groove 111 a provided at a lower portion of the tray conveyance path 111, and both end portions 121 b are bent at right angles to be outside of both sides of the tray conveyance path 111. This is a configuration that does not get in the way when the tray 20 moves on the tray conveyance path 111.

  Furthermore, the tray transport apparatus 100 includes a pair of left and right rod guide plates 112 for regulating the movement of the tray feed rod 121 on the end surface portions on both sides of the tray transport 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. Specifically, this configuration is configured to pass above the operation unit 800 and be 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 of the present embodiment will be mainly described with reference to FIGS. 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 rotated in the direction of arrow B by the power of the drive source on the main body side via the chain belt 202. A driving arm 220 that is rotated in the same direction by the driving shaft 203, a connecting arm 230 in which one end 230 a is rotatably connected to the distal end side portion 220 a of the driving arm 220, and a fixing pin to the take-out device fixing member 201 Guides that are held by 201a and 201b and have a shape of a letter J, whose outer shape is substantially alphabetic, and that have a shape in which the side closer to the tray transport device 100 is straight and the far side rises in a substantially R shape. And a guide portion 240 having a groove 241.

  Further, the take-out device 200 includes a first guided member 245 that is integrated with a cam shaft 271 (described later) and is inserted into the guide groove 241 so as to be smoothly slidable without rattling. A guide member 247, a substrate 250 having a bent portion 251 protruding from one end side of the side surface to which the guided members are connected and bent substantially at right angles, and protruding vertically from the bent portion 251 of the substrate 250; A pair of left and right extraction claw holding pins 252L, 252R and a root portion, which are rotatably held, are attached to a pair of left and right extraction claw holding pins 252L, 252R, respectively, and the seedling width is narrowed in a tweezers shape. A pair of extraction claws 261L, 261R for taking out the seedling 22 in the pot 21 and a root 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 a cam having an outermost edge portion 273 whose outer diameter varies depending on the position of the outermost edge portion with respect to the 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 271 270 and a substrate 250 that are pivotally connected to each other, and are removed from the seedling pot 21 along the pair of extraction claws 261L and 261R by a change in the outer diameter of the outermost edge 273 of the cam 270. Extraction pawl 261L, 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 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 out the seedling 22, and then the push rod 281 removes the seedling 22. When supplying to the planting tool 11, the extrusion 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 by the extraction member 260 and the extrusion rod 281, and the planting precision can be improved.

  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. Further, the first guided member 245 that is integral with the cam shaft 271 is transmitted via 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. Further, the second gear 292 is rotatably 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 is a member that pushes out the seedling 22 held by the left and right take-out claws 261L and 261R as the left and right push-out rods 281 and 281 slide along the pair of take-out claws 261L and 261R. The bases of the left and right push rods 281 and 281 are respectively provided on a mounting shaft 282 provided on a push arm 283 that rotates in the front-rear direction by the rotation of the cam 270, and the ends of the left and right push rods 281 and 281 It is made to face in the vicinity of the front ends of the extraction claws 261L and 261R.

  The left and right extrusion rods 281 and 281 are formed by bending an elongated wire rod having a certain degree of hardness and flexibility, and the base side is wound a plurality of times along the cylindrical mounting shaft 282 to form a coil portion 281a, 281a is formed, and the end side is formed at least around the periphery of the left and right extraction claws 261L, 261R, that is, the loop portions 281b, 281b surrounding the upper and lower and left and right extraction claws 261L, 261R are formed. .

  The left and right push rods 281 and 281 have a posture in which the left and right width on the base side attached to the mounting shaft 282 is narrower than the left and right width on the end side, and pass above the left and right extraction claws 261L and 261R. Arrange to do.

  The loop portions 281b and 281b bend the vicinity of the ends of the left and right push rods 281 and 281 toward the lower side outside the left and right extraction claws 261L and 261R, and are located below and inside the left and right extraction claws 261L and 261R. Bend toward. Then, the left and right extraction claws 261L and 261R are bent upward and on the inner side, the left and right extraction claws 261L and 261R are bent outward and the left and right extraction claws 261L and 261R, and the outer sides of the left and right extraction claws 261L and 261R. It is bent and configured. In addition, a bending part shall be formed by the bending method used as R shape.

  Further, a separation protrusion 282a for preventing the coil portions 281a and 281a of the left and right extrusion rods 281 and 281 from contacting each other is provided at the left and right central portions of the mounting shaft 282, and the base side of the left and right extrusion rods 281 and 281 is provided. To prevent the distance between the left and right sides from becoming too narrow.

  A first holding protrusion 283c is provided on the lower side of the push arm 283 and above the push arm connecting shaft 283d, and a second holding protrusion 250a is provided on the substrate 250. The first holding protrusion 283c and the first holding protrusion 283c 2 A tension spring 284 is provided across the holding projection 250a.

  When the cam 270 rotates in the direction of arrow B, the largest protrusion 273b having the largest outer diameter in the outermost edge 273 comes into contact with the outer peripheral edge of the root of the first holding protrusion 283c. The extension spring 284 is extended, the push arm 283 rotates counterclockwise in the drawing (see arrow C), and the push rod 281 connected to the mounting shaft 282 moves backward.

  Further, when the cam 270 further rotates in the direction of the arrow B, the outer diameter is smaller than the maximum diameter of the maximum projecting portion 273b in the outermost edge portion 273, and the outer diameter is smallest in the outermost edge portion 273. The contact position 273c1 (refer to the drawing) of the intermediate protrusion 273c having an outer diameter larger than the minimum protrusion 273a is in contact with the outer peripheral edge of the root portion of the first holding protrusion 283c.

  At this time, the tension spring 284 that has been stretched until then slightly contracts, and the push-out arm 283 rotates in the clockwise direction in the figure (see arrow D), and the left and right push-out rods 281 connected by the mounting shaft 282 are used. , 281 protrudes slightly, and the loop portions 281 b, 281 b come into contact with the seedling 22.

  Further, when the cam 270 further rotates in the direction of arrow B, the pushing position 273a1 in the smallest protrusion 273a having the smallest outer diameter in the outermost edge 273 contacts the outer peripheral edge of the root portion of the first holding protrusion 283c. It is the structure to do.

  As a result, the tension spring 284 is further contracted, the push arm 283 is swung clockwise in FIG. 8 (see arrow D), the left and right push rods 281, 281 further protrude, and the loop portions 281b, 281b are seedlings. In this configuration, 22 is completely discharged to the planting tool 11 side.

  When the left and right push rods 281 and 281 protrude and retreat after the seedling 22 is discharged to the planting tool 11, the left and right loop portions 281b and 281b advance and retreat along the outer peripheries of the pair of extraction claws 261L and 261R. Therefore, foreign matters such as soil adhering to the pair of extraction claws 261L, 261R are removed. The impurities are soil around the root of the seedling 22, broken fine roots, and the like, and are attached when the seedling 22 is taken out from the tray 20.

  If the above contaminants remain attached to the pair of extraction claws 261L, 261R, the contaminants narrow the left and right intervals between the extraction claws 261L, 261R, and the extraction claws 261L, 261R are difficult to enter the tray 20, If the seedling 22 is missed from the tray 20 or the timing for taking out the seedling is delayed and not inserted into the planting tool 11, a place where the seedling 22 is not planted, a so-called stock loss may occur. In particular, impurities need to be removed.

  In the above configuration, since the left and right extrusion rods 281 and 281 are formed by processing elongated wires, the pair of extraction claws 261L and 261R are held even when the left and right extrusion rods 281 and 281 slide in the front-rear direction. Since it is difficult to contact the seedling 22, it is prevented from being damaged when the seedling 22 is pushed out, the growth of the seedling 22 is stabilized, and the occurrence of the seedling 22 that withers after planting is prevented.

  In addition, since the weight of the left and right extrusion rods 281 and 281 can be reduced, the weight hardly becomes resistance when receiving a driving force, and the longitudinal sliding of the extrusion rods 281 and 281 becomes smooth. The seedling 22 can be reliably pushed out and released to the planting tool 11.

  In addition, since the coil portions 281a and 281a are formed on the base side of the left and right push rods 281 and 281, the end loop portions 281b and 281b move in the left-right direction in conjunction with opening and closing of the extraction claws 261L and 261R. Also, the amount of movement in the left-right direction of the bases of the left and right push rods 281 and 281 can be suppressed. Thereby, the change of the attachment position of the right and left extrusion rods 281 and 281 is prevented, and the seedlings 22 are reliably taken out from the tray 20 and released to the planting tool 11 without hindering the opening and closing operations of the extraction claws 261L and 261R. be able to.

  Then, the loop portions 281b and 281b slide back and forth while surrounding the outer peripheries of the extraction claws 261L and 261R. Since the adhering foreign matter can be scraped off, the adhering foreign matters make it difficult for the extraction claws 261L and 261R to enter the tray 20 and prevent the seedling 22 from being missed.

  Or the timing which takes out the seedling 22 is overdue, the seedling 22 is not released to the planting tool 11 at an appropriate timing, and it is prevented that the location where a seedling is not planted generate | occur | produces.

  Further, the end portions of the loop portions 281b and 281b formed by winding the extrusion rods 281 and 281 are located outside the extraction claws 261L and 261R, that is, in the non-holding action area of the seedling 22, thereby the extrusion rods 281 and 281. Therefore, the seedling 22 is prevented from being damaged, the growth of the seedling 22 is stabilized, and the occurrence of the seedling 22 that withers after planting is prevented.

  In addition, since each bent portion of the extrusion rods 281 and 281 has an R shape, the seedling 22 can be prevented from being damaged when coming into contact with the seedling 22, so that the growth of the seedling 22 is stabilized and after planting. Generation of the seedling 22 that withers is prevented.

  Then, when the left and right push rods 281 and 281 pass above the take-out claws 261L and 261R, the interval between the coil portions 281a and 281a and the loop portions 281b and 281b causes the upper portion of the seedling 22, that is, the foliage portion to collapse. Since it becomes the guide part to prevent, even if the holding posture of the seedling 22 is somewhat inappropriate by the extraction claws 261L, 261R, the seedling 22 can be prevented from falling down. Thereby, the posture of the seedling 22 at the time of release prevents the planting from entering the planting device 11 in a posture that can be planted, the occurrence of a stock loss is prevented, and the work of replanting the seedling 22 manually is unnecessary. Become.

  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 is a schematic diagram showing a general correspondence relationship 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. 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 operations of the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R will be described later together with the operations of the push rods 281 and 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 seedling raising 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. 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.

  Note that the trajectory K from the position K1 to the position K2 and the trajectory K from the position K6 to the position K1 are approximately linear, because the side closer to the tray conveying 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.

  Further, while the distal end portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R go from the position K3 to the position K4, the contact position 273c1 (see FIG. 8) in the intermediate protrusion 273c is the root portion of the first holding protrusion 283c. Contact the outer periphery. As a result, the right and left push rods 281 and 281 slightly protrude in front of the push position 273a1, and the loop portions 281b and 281b both come into contact with the seedling 2 · BR> Q.

  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 conveying 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 pushing position 273a1 (see FIG. 8) contacts the outer peripheral edge of the base portion of the first holding projection 283c between the position K4 and the position K5.

  Thereby, the extrusion rods 281 and 281 are completely protruded, and the seedlings 22 pushed out from the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R by the loop portions 281b and 281b of the extrusion rods 281 and 281 are planted. Supplied to the tool 11.

  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 transport device 100). Further, since the drive arm 220 is farther from the extraction position of the tray transfer 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, operations of the transmission mechanism 290 and the extrusion mechanism 280 will be mainly described with reference to FIGS.

  As shown in FIG. 6A, 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 is centered on the rotation fulcrum 220 b of the drive arm 220. Revolve in direction B. 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.

  Meanwhile, at this time, the maximum protrusion 273b of the outermost edge 273 of the cam 270 is in contact with the outer peripheral edge of the root of the first holding protrusion 283c, whereby the tension spring 284 is extended. The push-out arm 283 rotates counterclockwise in FIG. 8 (see arrow C), and maintains the state in which the push-out rods 281 and 281 connected by the mounting shaft 282 are retracted. 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 protrusion 273b of the outermost edge 273 of the cam 270 is still in contact with the outer peripheral edge of the root of the first holding protrusion 283c, whereby the tension spring 284 is extended. The push arm 283 maintains a state of rotating counterclockwise in FIG. 8 (see arrow C), and maintains a state in which the left and right push rods 281 and 281 connected by the mounting shaft 282 are retracted. Yes.

  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.

  In addition, while the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R go from the position K3 to the position K4, the contact position 273c1 (see FIG. 8) in the intermediate protrusion 273c is the root portion of the first holding protrusion 283c. As described above, the push rods 281 and 281 are slightly protruded in front of the push position 273a1 and the loop portions 281b and 281b are in contact with the seedling 22 due to contact with the outer peripheral edge.

  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 rods 281 and 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 replaces the intermediate protrusion 273c on the outer peripheral edge of the base portion of the first holding protrusion 283c. Contact.

  Thereby, when the root portion of the first holding projection 283c moves to the contact position 273c1 in front of the extrusion position 273a1 by the restoring force of the tension spring 284, the extrusion arm 283 rotates slightly in the clockwise direction. When it reaches the pushing position 273a1, it is instantaneously rotated clockwise (see arrow D in FIG. 8).

  That is, the push rod 281 connected by the mounting shaft 282 is slightly protruded when the base portion of the first holding protrusion 283c comes to the contact position 273c1, and then when the push rod 281 reaches the push position 273a1, the push rod 281 protrudes completely. At the same time, the loop portions 281b and 281b of the push rods 281 and 281 move while expanding the distal ends of the pair of extraction claws 261L and 261R.

  As a result, the extrusion rods 281 and 281 are protruded to such an extent that the loop portions 281b and 281b come 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.

  In addition, since the loop portions 281b and 281b move in a state of surrounding the outer periphery of the pair of extraction claws 261L and 261R and expanding the distal end side, the foreign matters attached to the extraction claws 261L and 261R At the same time, the left and right intervals of the extraction claws 261L and 261R are maintained so that the seedlings 22 can be smoothly extracted from the tray 20.

  Next, opening and closing operations of the pair of extraction claws 261L and 261R, and the push rod when the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R perform the operation from the position K5 toward the position K6, and the push rod The operations of 281 and 281 are 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 distal end portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R change to a state in which both distal end portions are opened by a force acting in a 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 instead of the minimum protrusion 273a of the outermost edge 273 of the cam 270 comes into contact with the outer peripheral edge of the root portion of the first holding protrusion 283c. The extension spring 284 is extended, the push arm 283 is swung counterclockwise in FIG. 8 (see arrow C), and the push rods 281 and 281 connected by the mounting shaft 282 are retracted. Change.

  The pair of extraction claws 261L and 261R is a single piece from the root part to the tip part, and has been described as being made of the same metal plate member. However, the present invention is not limited thereto, and the tip side is removed. For example, a rubber plate or a resin plate having elasticity may be used. 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 effect of not crushing the seedling 22 can be exhibited.

  Further, the push rods 281 and 281 cover 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 to the vicinity of the position K6. It is configured. Thereby, when moving from the position K5 to the position K6, the leaves of the seedling 22 on the tray 20 can be prevented from being caught by the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R.

  The push rods 281 and 281 are configured to retreat 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 leaf of the seedling 22 can be prevented from being entangled with the tip portions 261Lp and 261Rp.

  Next, with reference to FIGS. 4 and 5 again, the mechanism for intermittently driving the tray feed rod 121 of the tray transport apparatus 100 will be further described.

  As shown in FIG. 5, the tray vertical feeding device 120 has (1) the above-described tray feeding rod 121 and (2) the upper end portion 121b1 of both end portions 121b of the tray feeding rod 121 fixed, and one side curved 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. 4 and 5.

  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. 5).

  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. 4B and 5), 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 axial center of the tip portion 142, whereby the central portion 121a of the tray feed rod 121 moves in the direction of the arrow 121a1 (see FIG. 5). 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. 5) while maintaining the state positioned 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. 5) 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. 5) 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.

  When all the seedlings 22 for the horizontal row of the seedling pot 21 are taken out, unlike the above, the tip of the vertical feed drive arm 150 fixed at the center position of the vertical feed rotary shaft 151 can be freely rotated. 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.

  When the tray 20 is vertically fed by the tray conveying device 100 described above, the tray 20 needs to be precisely fed vertically by one row so that the next left and right row of seedlings 22 can be properly taken out by the take-out device 200. However, since the vertical feed of the tray 20 is the movement of the tray feed rod 121 by contact and its own weight, if the tray 20 is not fed vertically to an appropriate position, the seedling 22 cannot be taken out by the take-out device 200, or the take-out posture is disturbed. When released into the planting tool 11, the planting tool 11 does not enter the planting posture in a posture suitable for planting, so that a place where a seedling cannot be planted, a so-called stock loss may occur.

  If the tray 20 is on the upper side in the movement direction than the position suitable for taking out the seedlings, even if the tray feed rod 121 enters the groove on the back side of the tray, it moves to the lower side due to vibration of the airframe or its own weight, Since it moves to a position suitable for taking out the seedling, the influence of the above problem is small.

  However, when the tray 20 is on the lower side of the moving direction than the position suitable for taking out the seedling, it does not move to a position suitable for taking out the seedling naturally, and at least the left and right rows The possibility of occurrence increases. Although the operator can adjust the position of the seedling tray, if the position of the tray 20 is changed during the lateral feeding, the takeout device 200 may not take out the seedling 22 and a lack of stock may occur.

  Furthermore, depending on the amount of movement of the tray 20, the tray 20 moves to the lower side, and one row of seedlings exceeding the seedling extraction position remains in the tray 20, and seedlings are planted as planned. There is a problem that can not be done.

  In order to solve these problems without causing a stock loss, it is only necessary to temporarily stop the planting operation and manually correct the position of the tray 20, but during that time the planting operation is interrupted, There is a problem that work efficiency decreases.

  In order to solve the above problem, the brake arms 180L and 180R that contact the upper surface of the tray 20 at the end of the longitudinal feed and restrict the movement are arranged on both the left and right sides of the tray transport device 100 and more than the working area of the tray feed rod 121. Each is provided above (upper side in the moving direction of the tray 20). If the left and right brake arms 180L and 180R are constantly in contact with the tray 20, the tray 20 will not move to the seedling removal position due to resistance, so the left and right brake arms 180L and 180R The structure is switched to the brake state and the release state in conjunction with each other.

  As shown in FIGS. 10 and 11, a spring receiving stay 181 (see FIG. 11) having a long hole for receiving a pin 132 for hooking one end of the feed rod arm tension spring 161 is provided at the upper end of the protruding cam 131. . One end of the spring receiving stay 181 has an arc shape. Further, the right brake interlocking arm 183R is provided on the right brake turning shaft 182R of the right brake arm 180R. The right brake arm 180R is provided on the lower side in the transport direction of the tray transport device 100, and the right brake interlock arm 183R is provided on the lower side in the transport direction of the tray transport device 100.

  A plurality of adjustment mounting holes 183aR are formed in the circumferential direction of the right brake rotating shaft 182R on the mounting base side of the right brake interlocking arm 183R, and the mounting base side of the right brake arm 180R is formed. Is formed with one mounting hole 180aR. Further, one end of the torque spring 184 provided on the right brake rotating shaft 182R is attached to the attachment hole 180aR, and the other end is attached to any one of the adjustment attachment holes 183aR. The brake force can be adjusted.

  At the end of the right brake interlocking arm 183R, a wide portion 185R having a wider vertical width than other portions is formed in a side view. The wide portion 185R is configured to protrude toward the side facing the protruding cam 131 and the spring receiving stay 181 to increase the width. The wide portion 185R is formed with a tight taper angle.

  The front end portion of the spring receiving stay 181 moves in conjunction with the rotation of the protruding cam 131 and comes into contact with the right brake interlock arm 183R at a predetermined position, thereby bringing the right brake arm 180R into the tray 20. Apply the brake by touching.

  On the other hand, as shown in FIG. 11, the left brake arm 180 </ b> L is not in a position in contact with the spring receiving stay 181, and thus has a different configuration from the right side.

  A left brake interlock arm 183L is provided coaxially with the left rotation shaft 182L of the left brake arm 180L. The left brake arm 180L is provided on the lower side in the transport direction of the tray transport device 100, and the left brake interlock arm 183L is provided on the lower side in the transport direction of the tray transport device 100.

  A plurality of adjustment mounting holes 183aL are formed in the circumferential direction of the left brake rotation shaft 182L on the mounting base side of the left brake interlocking arm 183L, and the mounting base side of the left brake arm 180L is formed. Is formed with one mounting hole 180aL. Further, one end of the torque spring 184 provided on the left brake rotating shaft 182L is mounted in the mounting hole 180aL, and the other end is mounted in any one of the adjustment mounting holes 183aL. The brake force can be adjusted.

  The brake interlocking arm 183L is configured to rotate in contact with a check roller 152 provided in the longitudinal feed drive arm 150, and is narrower than other portions on the surface and end side in contact with the check roller 152. A narrow portion (concave portion) 185L is formed.

  In the following, switching between the brake action and the non-action of the tray 20 by the left and right brake arms 180L and 180R will be described.

  First, when the tray feed rod 121 is moving downward of the tray 20 (121a1), the spring receiving stay 181 is separated from the right brake interlock arm 183R and the check roller 152 is left brake interlock arm 183L. The left and right brake arms 180 </ b> L and 180 </ b> R are separated upward from the tray 20.

  Accordingly, the left and right brake arms 180L and 180R do not become resistance at the start of vertical feeding of the tray 20, and the tray 20 starts to move due to its own weight.

  Then, while the tray feed rod 121 moves to the lower side of the tray 20 and then moves to the next line (between 121a2 and 121a3), the spring receiving stay 181 contacts the right brake interlock arm 183R and checks. The roller 152 contacts the left brake interlock arm 183L to bring the left and right brake arms 180L and 180R into contact with the surface of the tray 20.

  As a result, it is possible to apply a braking force to the left and right sides of the tray 20 that has started to move, so that the tray 20 is prevented from moving greatly to the lower side in the movement direction due to its own weight, and the tray 20 is moved by more than one row. From being stopped.

  Further, when the tray 20 moves by one row and the tray feed rod 121 contacts the back surface of the tray 20 (121a4), the spring support stay 181 contacts the wide portion 185R of the right brake interlocking arm 183R, and the check roller. When 152 is in contact with the narrow portion 185L of the left brake interlock arm 183L, the force with which the left and right brake arms 180L and 180R are in contact with the surface of the tray 20 is weakened.

  As a result, it is possible to prevent the braking force of the left and right brake arms 180L and 180R from acting excessively and stopping the movement of the tray 20 in contact with the tray feed rod 121 from stopping on the upper side of the position suitable for taking out seedlings. The tray 20 can be stopped at a position suitable for taking out the seedling, so that the occurrence of a missing line is prevented.

  The tray 20 has a different number of holes for cultivating the seedlings 22 and generally has 128 holes and 200 holes. As a matter of course, the 200-hole tray 20 has a longer front-rear length than the 128-hole tray 20.

  The configuration in which the wide portion 185R is formed on the right brake interlock arm 183R and the narrow portion 185L is formed on the left brake interlock arm 183L acts when the tray 20 having a long front and rear length is stopped. When the tray 20 with 128 holes is used, if the movement of the tray 20 is stopped when the brake force of the left and right brake arms 180L and 180R is strong (121a3), Since planting operations using different trays 20 can be performed, it is necessary to grow seedlings only on the tray 20 that matches the seedling transplanter, or to select and carry only the tray 20 that matches the seedling transplanter. This reduces the work effort and improves the adaptability of the work conditions.

  In the above, it is assumed that a problem occurs due to the movement of the tray 20, but when the tray feeding device 121 is shifted from the set locus, the tray feeding device 121 pulls the tray 20 to the lower side in the transport direction. It will be moved beyond the position suitable for taking out the seedling.

  In order to prevent this, as shown in FIG. 12, rod rails 121r through which the left and right ends of the tray feed rod 121 pass may be formed on the left and right side plates 111a, 111a provided on the left and right sides of the tray transport path 111. . The rod rail 121r is the same as the trajectory drawn when the left and right ends of the tray feed rod 121 feed the tray 20 vertically, thereby preventing the tray feed rod 121 from drawing a trajectory that is not suitable for transporting the tray 20. To do.

  As described above, the tray feed rod 121 can accurately move the tray 20 by one row, so that the seedlings can be taken out reliably and the occurrence of missing stock can be prevented.

  The planting tool 11 is for planting the seedling received from the take-out device 200 in the field, and is configured to enter the soil while the lower side is opened to open the seedling during planting. Thereby, the soil of a farm field may adhere to the inside of the planting tool 11. When this soil accumulates inside the planting tool 11, a part of the space in the planting tool 11 is occupied by the soil, and the posture of the seedling received from the take-out device 200 becomes a posture unsuitable for planting by the soil. There is a risk of affecting the growth of seedlings planted.

  In order to prevent this, the planting tool 11 is provided with a cleaning device that supplies the cleaning water conveyed by the water pump 500, and when the planting tool 11 descends, the seedlings 22 are planted and the soil is washed away. Thereby, since the soil in the planting tool 11 is washed away at every planting, the posture of the seedling is prevented from being disturbed by the accumulation of soil, and the seedling planting accuracy is improved.

  The configuration of the water pump 500 will be described. As shown in FIGS. 13 and 14, a transmission shaft 510 that transmits driving force from the take-out device 200 to the tray conveyance device 100 is protruded to the left and right sides (right side) of the machine body, and the crank plate 520 is rotated clockwise on the transmission shaft 510. It is attached so that it can rotate integrally. Specifically, a support plate 515 is attached to the end of the transmission shaft 510, and a crank plate 520 is attached to the support plate 515 from the outside of the machine body via a fixing member 521 such as a bolt.

  In order to mount the fixing member 521, the crank plate 520 is formed with a first adjustment slot 522 and a second adjustment slot 523 longer than the first adjustment slot 522. By changing the position where the fixing member 521 is passed through the first adjustment slot 522 and the second adjustment slot 523, the timing at which the water supply pump 500 supplies water is adjusted.

  Further, the crank plate 520 is formed with four rod mounting holes 525 at predetermined angles with the transmission shaft 510 as the center, specifically, every 90 degrees. The four rod mounting holes 525... Are not positioned on concentric circles around the transmission shaft 510.

  Then, the crank plate 520 is mounted on the transmission shaft 510 so that the rod mounting hole 525 of the four rod mounting holes 525.. One end of the pump rod 530 is attached. Further, the other end of the pump rod 530 is connected to a pump case 540 for taking in and out washing water.

  Since none of the four rod mounting holes 525 is concentric, the amount of forward / backward movement of the pump rod 530 is changed for each mounting position, so that the water supply amount of the water supply pump 500 can be set.

  A pump head 550 is provided at one side of the pump rod 530, and a bearing 560 for rotatably supporting the pump rod 530 is provided inside the pump head 550. Pump support shafts 570 and 570 serving as fulcrums of the water supply pump 500 are provided on both the left and right sides of the pump head 550 and the bearing 560.

  The bearing 560 and the pump support shafts 570 and 570 are brought into contact with each other, and when lubrication is performed from one grease nipple 650 provided on the pump head 550, grease is supplied to both, thereby reducing time and labor required for lubrication work. Plan.

  Further, a suction nipple 580 for connecting a water supply hose (not shown) connected to a water tank is provided on the left and right sides (right side) of the pump head 550 and on the other side (left side) and on the lower side. Is provided with a delivery nipple 590 for connecting a water supply hose (not shown) for sending water to the planting tool 11.

  Note that the bottom surface of the delivery nipple 590 is positioned below the bottom of the pump case 540 as shown in FIG.

  The suction nipple 580 and the delivery nipple 590 are connected to a valve plate 600 provided inside the valve head 550. The valve plate 600 is formed by connecting three plates. Specifically, it comprises a pair of water flow plates 610F and 610R and an intermediate plate 620 provided between the front and rear of the water flow plates 610F and 610R.

  As shown in FIG. 15, the water flow plates 610F and 610R have a mounting hole 611 for mounting to the pump rod 530 at the center, and a U-shape in front (rear) view on a part of the circumference. A notch 612 having a shape is formed, and a round hole 613 is formed at a position to be pointed around the attachment hole 611, and the members are substantially the same shape. When the pump rod 530 is mounted, the front water passage plate 610F is arranged so that the notch 612 faces the suction nipple 580 side and the round hole 613 faces the delivery nipple 590 side, and the rear water passage plate 610R The circular hole 613 faces the suction nipple 580 side, and the notch 612 faces the delivery nipple 590 side.

  In addition, the intermediate plate 620 has a mounting hole 621 for mounting on the pump rod 530 at the center, and a pair of intermediate cutouts 622 and 622 at positions to be pointed around the mounting hole 621. Form.

  Since the intermediate plate 620 is made of an elastic material such as rubber, the protrusions 623 and 623 positioned between the left and right of the intermediate notches 622 and 622 block the water path when contacting the round holes 613 and 613. Therefore, it becomes possible to move water to the notches 612 and 612.

  Further, a piston head 640 for taking in and out water is provided on the rear side of the pump rod 530. The piston head 640 includes front and rear piston plates 641 and 641 having a diameter along the inner diameter of the pump case 540, and an O-ring 642 provided between the front and rear piston plates 641 and 641 to prevent water leakage.

  In the above configuration, when the transmission shaft 510 rotates in conjunction with the operation of the take-out device 200, the crank plate 520 rotates over a predetermined angle in the clockwise direction. Thus, the pump rod 530 slides in accordance with the rod mounting holes 525... Attached, and the piston head 640 is slid in the front-rear direction within the pump case 540. The water pump 500 is configured so as not to interfere with the sliding of the pump rod 530 by rotating up and down with the left and right pump support shafts 570 and 570 provided in the pump head 550 as fulcrums.

  In the water pump 500 of the present case, the pump rod 530 moves to the front side of the machine body by the clockwise rotation of the crank plate 520, and the piston head 640 moves from the delivery nipple 590 to the planting tool 11 side when moving from the rear side of the machine body to the front side. Since water is supplied, the pump rod 530 is moved by the driving force of the transmission shaft 510. Thereby, since the load by water pressure is hard to apply to the pump rod 530, the pump rod 530 can be made thinner than before, so that the water pump 500 can be made compact.

  In addition, since the valve plate 600 is provided in the pump head 550, the pump capacity can be adjusted by changing the pump case 540 to one having a different length, so that the application range of work conditions is widened.

  And, when the bottom of the delivery nipple 590 is positioned lower than the bottom of the pump case 540 in the side view, the water in the pump case 540 is completely drained when the water pump 500 is idled during drainage. Therefore, the water pump 500 is prevented from being damaged by the water remaining inside.

11 Planting tool 20 Tray 22 Seedling 100 Tray transfer device (transfer device)
111a Side plate 121 Tray feed rod (tray moving member)
121r Rod rail (rail)
200 Unloader 180L Brake arm (movement restriction member)
180R Brake arm (movement restriction member)
183L Brake interlocking arm (interlocking regulation member)
183R Brake interlocking arm (interlocking regulation member)
185L Wide part (Attenuation reduction part)
185R Narrow part (Attenuation reduction part)
261L Extraction claw (Extraction member)
261R Extraction claw (Extraction member)
281 Extruded rod (extruded member)
281a Coil part 281b Loop part 282 Mounting shaft 283 Extrusion arm (extrusion moving member)

Claims (6)

A transport device (100) for transporting the tray (20) on which the seedling (22) is vegetated, and a takeout device (200) for taking out the seedling (22) from the tray (20) moved to a predetermined position by the supply device (100). And a transplanter provided with a planting tool (11) for planting the seedling (22) taken out by the take-out device (200) in a field,
The take-out device (200) takes out the seedling members (261L, 261R) for taking out and holding seedlings from the tray (20) and the seedlings held by the takeout members (261L, 261R) to the planting tool (11). It is composed of an extruded member (281) to be extruded,
The extruding member (281) has a loop portion (281b) surrounding the outer periphery of the extraction member (261L, 261R).   The extruding member (281) is composed of a wire, and the loop portion (281b) winds one end of the extruding member (281) around the outer peripheral portion in the short direction of the extraction member (261L, 261R). The end portion of the winding portion of the loop portion (281b) is located on a different surface from the holding action surface of the seedling (22) of the extraction member (261L, 261R). 2. The transplanter according to 1. An extrusion moving member (283) for reciprocating the extrusion member (281) along the longitudinal direction of the extraction member (261L, 261R) is provided, and an attachment shaft (282) is provided on the extrusion movement member (283), A base of the pushing member (281) is provided on the mounting shaft (282),
The transplanter according to claim 2, wherein a coil portion (281a) is formed at a base portion of the pushing member (281) by being wound a plurality of times so as to surround an outer periphery of the mounting shaft (282). .   The transplanter according to any one of claims 1 to 3, wherein the push-out member (281) is disposed so as to pass above in the longitudinal direction of the take-out member (261L, 261R). The transport device (100) moves the tray (20) by a predetermined distance, and controls the movement of the tray (20) when the take-out device (200) takes out the seedling. And a movement restricting member (180L, 180R) that attenuates the moving force of the tray (20) and stops it at a predetermined position,
In conjunction with the operation of the transport device (100), provided with an interlocking restriction member (183L, 183R) that switches the action state and non-action state of the movement restriction member (180L, 180R),
The interlocking restricting member (183L, 183R) forms an attenuation reducing portion (185L, 185R) for weakening the moving action damping action of the movement restricting member (180L, 180R). The transplanter according to any one of the above. The tray moving member (121) is configured to move along a predetermined locus in conjunction with the transport of the tray (20) of the transport device (100),
A side plate (111a) is provided on a side of the tray moving member (121), and a rail (121r) is formed on the side plate (111a) along a movement locus of the tray moving member (121). 5. The transplanter according to 5.

Images