JP6631605B2 - Transplant machine - Google Patents

Description

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

  Conventionally, an operator manually feeds seed potato or seedling transplants prepared on the mounting table of a transplanter one by one to a plurality of supply cups that are rotated and conveyed in a loop as the transplanter runs. In addition, there is known a transplanter that automatically transplants the supplied transplant into a field via a planting tool (for example, see Patent Document 1).

  Other examples of the conventional transplanter include a seedling supply device for placing a seedling tray provided with a large number of seedling pots on the running body on a running body, a seedling planting device for planting seedlings in ridges, and a seedling supply device. 2. Description of the Related Art There is known a device that includes a seedling removal device that takes out seedlings as transplants one by one from a seedling tray of the device and supplies the seedlings to a seedling planting device (for example, see Patent Document 2).

  These conventional transplanters are configured to transmit the driving force from the engine to the implanting device side via an implanting clutch.

  As a conventional interplant adjusting mechanism of the transplanter, for example, in the transplanter disclosed in Patent Literature 1, the pin provided on the interstock speed change output shaft is brought into contact with the implanted transmission regulating arm to rotate the implanted transmission regulating arm. By moving the planting clutch, the engagement with the planting transmission regulating groove formed on the outer peripheral portion of the planting clutch is released, and the planting clutch shaft is driven to move the planting tool up and down.

  Further, when the outer peripheral portion of the planting clutch makes one rotation, the tip of the planting transmission regulating arm comes into contact with the planting transmission regulating groove in the outer peripheral portion again to stop driving the planting clutch shaft, and to perform planting. The vertical movement of the tool is stopped.

  Further, by selecting one of a plurality of types of inter-gear shift output gears that rotate integrally with the inter-gear shift output shaft, the transmission ratio from the inter-gear shift input shaft is changed to change the rotation speed of the inter-gear shift output shaft. Configuration.

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

JP-A-11-227593 JP 2001-69817 A

  However, in the above-described conventional inter-strain adjusting mechanism of the seedling transplanter, since the configuration is such that the operator can freely set the inter-strain regardless of the running speed, an appropriate setting is made between the stocks in accordance with the running speed. There was a problem that it was not possible to set the stock ratio. Some trays containing seedlings have different numbers of stored seedlings. When trays having different numbers of storages are used, it is necessary to perform a switching operation in accordance with the number of stored seedlings.

  In consideration of such problems of the conventional transplanter, the present invention can set an appropriate inter-strain within a set range between the inter-strains corresponding to the traveling speed, and can perform switching according to the number of seedlings accommodated in the tray. It is an object of the present invention to provide a transplanter that can be easily operated.

In order to solve the above problems, a first aspect of the present invention, the vehicle body (15), a tray supply equipment for supplying a tray (20) containing a graft (22), ported from the tray (20) in taking out the object field to inoculate planting device (11) take-out apparatus transplanter having a (200) supplied to the tray supply equipment is traversing device for feeding the tray (20) in the horizontal direction ( 170) and a feed amount switching device (510) for switching the feed amount of the tray (20) by the lateral feed device (170), wherein the feed amount switching device (510) is a drive gear for transmitting a driving force. (511), a switching transmission shaft (520) arranged movably in the axial direction, and switching gears (512a, 512) having different transmission ratios rotatably inserted into the switching transmission shaft (520). ) And a rotatable slide lever (540) for moving the switching transmission shaft (520) in the axial direction, wherein the slide lever (540) is moved downward from one position to the other position. Is operated, the switching transmission shaft (520) moves to connect the driving gear (511) and one of the switching gears (512a, 512b) (512a), and the slide lever (540). ) Is operated from one position upward to one position downward from the other position, the switching transmission shaft (520) moves to move between the drive gear (511) and the switching gears (512a, 512b). The other switching gear (512b) is configured to be connected, and an elevating mechanism ( 00), a lifting / lowering operating tool (81) for operating the lifting / lowering mechanism (500), and a height detecting unit (710) for detecting whether or not the traveling vehicle body (15) has reached a predetermined height for planting. , 770), the lifting / lowering operating tool (81) is set at a position for lowering the traveling vehicle body (15), and the height detector (710, 770) detects that the traveling vehicle body (15) is at a predetermined height. And a controller (800) for operating the driving device (470) to turn on and off the planting clutch (420), provided that the tray supply device detects the arrival of the tray. A plurality of seedling pots (21) formed on the back side of (20) are inserted from the back side of the tray (20) into gaps (21b) between the seedling pots (21) vertically adjacent to each other and up to a predetermined position. By moving the tray (20 ) Is moved by one row in the horizontal direction of the seedling raising pot (21) to get out of the gap (21b), and a tray feed rod (121) is provided to move upward by one row in the horizontal direction of the seedling raising pot (21). A rod guide formed with a notch (112a) for temporarily holding the tray feed rod (121) after the tray feed rod (121) performs a feed operation and restricting movement of the tray (20); A transplanter comprising a plate (112) .

According to a second aspect of the present invention, the control unit (800) is set at a position where the lifting / lowering operation tool (81) lowers the traveling vehicle body (15) , and the height detection unit (710, 770) is When detecting that the traveling vehicle body (15) has reached a predetermined height, the driving device (470) is operated to transmit a driving force to the planting clutch (420). Item 10. The transplanter according to item 1.

The third of the present invention, the tray supply equipment, the longitudinal feeding device for feeding a tray (20) in the longitudinal direction (120), in conjunction with the operation of the vertical feed device (120), said tray (20 3. The transplanting machine according to claim 1, further comprising a tray pressing device (920) for changing a pressing force for restricting the vertical movement of the device (3).

  According to a fourth aspect of the present invention, a planting clutch (420) for turning on / off the driving force to the planting tool (11), and the planting clutch (420) is turned on / off at a predetermined operation cycle. A driving device (470), a traveling transmission (190) for designating one traveling speed from a plurality of traveling speeds of the traveling vehicle body (15), and a plurality of plantings corresponding to the plurality of traveling speeds. A storage unit (810) in which the range between the plants is stored in advance, a display unit (630) for displaying the range between the planted plants corresponding to the traveling speed specified by the traveling transmission (190), and the display unit (630) The configuration in which the control unit (800) determines the operation cycle of the driving device (470) based on the planting stock selected within the range between the planting strains displayed in ()) and the designated traveling speed. 4. The method according to claim 1, wherein A transplanter according to claim.

  Further, a first related invention relating to the above-mentioned first to fourth inventions is a method according to the present invention, wherein the range between the planted strains displayed on the display unit (630) corresponds to the traveling speed of the traveling vehicle body (15). A transplanter provided with an inter-stock switching unit (640) for switching settings between planted strains.

  Further, in the above-described first to fourth inventions and the second related invention related to the first related invention, in the storage unit (810), as the traveling speed is higher, the range between the corresponding planted strains is larger. The transplanter according to claim 1, wherein the size of the transplanted plant is set to be larger.

  Further, in the above-mentioned first invention and the third related invention related to the first or second related invention, the slide lever (540) may be moved to one position downward or the other upward to the slide lever (540). A spring member (545) for applying a biasing force to rotate to the position is provided, and one end of the spring member (545) is provided on a fixing pin (544) provided on the slide lever (540), and other than the spring member (545). The end is a transplanter characterized by being provided on the fuselage side.

According to the first aspect of the present invention, since the switching transmission shaft itself is configured to slide in the axial direction, the feed amount switching device (510) for the tray (20) has a simple structure.
Also, unnecessary operation of the planting tool (11), such as so-called aerial planting, which performs meaningless planting operation in the air, can be prevented.
Further, the removal device (200) takes out the implant (22) from the tray (20) and transfers it to the implanting tool (11) to implant the implant (22), and the tray feed rod (121) moves the tray (20). The tray (20) is transported in units of the seedling pot (21) by feeding the tray (20) to a predetermined position by entering the gap (21b) between the seedling pots (21) on the back side of (1). The transfer accuracy is ensured, and the implant (22) can be taken out by the take-out device (200) and can be reliably transferred to the implant (11).
A notch (112a) is formed in the rod guide plate (112) for temporarily holding the tray feed rod (121) and restricting the tray (20) from moving downward. ) Can prevent the tray (20) from moving downward due to the weight of the transplant (22) placed therein, thereby improving the accuracy of removing the seedlings.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, when the planting condition is satisfied based on the lifting / lowering operation tool (81) and the height detectors (710, 770), the planting tool ( Since 11) is operated, the planting operation can be started from the end of the field.

  According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, it is possible to prevent the tray (20) from shifting in the vertical direction.

  Further, at the time of vertical feeding, the tray (20) can be smoothly fed vertically by weakening the pressing force of the tray pressing device (920).

  According to the fourth aspect of the present invention, in addition to the effects of any one of the first to third aspects of the present invention, a display capable of displaying a range between planted plants corresponding to a traveling speed specified by the traveling transmission (190). By using the section (630), an appropriate planting stock can be set within a range between the planting stocks corresponding to the designated traveling speed.

  Further, it is possible to set an appropriate planting interval in accordance with work conditions such as a field and a running speed.

  In addition to the effects of the first to fourth aspects of the present invention, according to the first related invention, when planting between narrow plantings, the running speed is slowed down and the operating speed of the planting tool (11) becomes extremely high. By suppressing this, it is possible to improve the planting accuracy. Further, when planting between wide planting stocks, work efficiency can be improved by increasing the running speed. In addition, in the operation on the slope, when the traveling speed is changed between the up traveling and the down traveling, it is possible to set a desired planting stock at each traveling speed at each traveling speed in consideration of the traveling slip.

  In addition to the effects of the first to fourth inventions and the first related invention, when planting between narrow plantings according to the second related invention, the running speed is reduced to reduce By suppressing the operation speed from becoming extremely high, it is possible to improve the planting accuracy. Further, when planting between wide planting stocks, the running speed can be increased to improve the work efficiency. In addition, in the operation on the slope, when the traveling speed is changed between the up traveling and the down traveling, it is possible to set a desired planting stock at each traveling speed at each traveling speed in consideration of the traveling slip.

  In addition to the effects of the first present invention and the first or second related invention, according to the third related invention, the slide lever (540) is turned to one position where it is turned upward by the spring member (545) and is turned downward. Since it is configured to be operated to the other position, the feed amount switching device (510) can be made compact.

Left side view of the seedling transplanter according to the first embodiment of the present invention. Plan view of the seedling transplanter of the first embodiment Left side view of a seedling planting device and a seedling planting device drive mechanism in the seedling transplanter of the first embodiment. Schematic left side view of the seedling transplanter driving mechanism in the seedling transplanter according to the first embodiment. Perspective view of the shift lever in the seedling transplanter according to the first embodiment. FIG. 2 is a schematic cross-sectional view illustrating a transmission gear mechanism of a transmission case in the seedling transplanter according to the first embodiment. FIG. 7A is a perspective view of the tray supply device according to the first embodiment, and FIG. 7B is an enlarged perspective view of a portion X in FIG. FIG. 2 is a schematic side view showing the configuration of the tray vertical feeding device according to the first embodiment. Schematic perspective view of the take-out device according to the first embodiment. Schematic left side view of the unloading device of the first embodiment FIG. 3 is a schematic diagram showing a schematic correspondence between the rotation position of the seedling drive arm and the position on the trajectory of the tip of the pair of extraction claws in the extraction device of the first embodiment. FIG. 3 is a plan view illustrating various operation levers and an operation unit disposed near a pair of left and right handle grips of the operation handle according to the first embodiment. Left side view showing a schematic configuration of a planting depth adjusting mechanism according to the first embodiment. Schematic block diagram illustrating input / output to a control unit according to the first embodiment. Side view for explaining a configuration in which a hydraulic pump is arranged between an engine and a transmission case according to the first embodiment. (A): a schematic plan view of another body control mechanism, (b): a schematic side view of another body control mechanism, (c): a schematic enlarged partial side view of a hydraulic rod device. FIG. 4 is a perspective view illustrating a tray guide angle provided in a tray transport path. Plan view of second seedling transplanter according to Embodiment 2 of the present invention FIG. 18 is an enlarged partial cross-sectional view for explaining a power transmission path in the second gear mechanism of the Q section shown in FIG. Enlarged right side view of Q part shown in FIG. 20 is a rear view of the slide lever of FIG. 20 viewed from the R direction, that is, from the rear side of the traveling vehicle body. Schematic side view for explaining the tray pressing device of the second embodiment. FIG. 9 is an enlarged partial cross-sectional view for explaining a power transmission path in a third gear mechanism according to the third embodiment. A schematic side view for explaining a second planting clutch. (A): perspective view of the bonnet of the seedling transplanter, (b): perspective view of the bonnet of FIG.

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

(Embodiment 1)
FIG. 1 shows a side view of a seedling transplanter according to an embodiment of the present invention, and FIG. 2 shows a plan view.

  As shown in FIGS. 1 and 2, a seedling transplanter 1 for transplanting seedlings such as vegetables includes a traveling body 15 having a pair of left and right front wheels 2 and rear wheels 3 as traveling wheels, and a front portion of the traveling body 15. And a transmission case 4 (also referred to as a main transmission case) covered with a bonnet 109 and a seedling 22 (see FIG. 7) disposed at a rear portion of the traveling vehicle body 15 for planting in a field. A seedling planting apparatus 300 that swings the seedling 11 up and down, a tray supply apparatus 100 that supplies a tray 20 containing the seedlings 22, and the seedlings 22 are taken out from the seedling pot 21 of the tray 20 of the tray supply apparatus 100 and planted. A feeding device 200 for supplying to the tool 11, a planting depth adjusting mechanism 700 (see FIG. 13) including a sensor plate 710 for keeping the planting depth of the seedling constant, a crushing wheel 13, a steering handle 8, and Operation And it is configured to include an operation section 600 or the like which is arranged in the central portion of the handle 8.

  The tray supply device 100 and the take-out device 200 will be described later with reference to FIGS.

  The rotational power output from the engine 12 is branched by the transmission case 4, transmitted to the pair of left and right rear wheels 3 via the pair of left and right traveling transmission cases 9, and planted on the rear side of the transmission case 4. The transmission is also transmitted to the attached transmission device 18.

  That is, in the seedling transplanter 1 of the present embodiment, in order to take out the seedlings 22 from the seedling raising pot 21 and plant them on the ridges of the field, the power from the transmission case 4 is transmitted to the planting transmission 18 and the chain belt The power is transmitted to the removal device 200 via the 202 and to the planting device 11 via the seedling planting device drive mechanism 400 attached to the planting transmission device 18.

  A part of the power transmitted from the transmission case 4 to the planting transmission 18 is transmitted to a later-described vertical feed drive shaft 151 via a vertical feed drive chain belt 181 as shown in FIG. A part of the power transmitted during the vertical feed drive is transmitted to a lead camshaft 171 described later via a gear mechanism 182. The vertical feed drive chain belt 181 and the gear mechanism 182 are housed in a seedling feed transmission case 180 (see FIG. 2).

  The seedling planting apparatus 300 and the seedling planting apparatus driving mechanism 400 will be described later with reference to FIGS.

  A main frame 17 extending to the right is provided at the rear of the left and right frames 16 arranged in the left and right direction at the rear end of the transmission 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. I have.

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

  That is, the seedling transplanter 1 of the present embodiment is accommodated in the tray 20 while the traveling vehicle body 15 is advanced while straddling the ridge U by the pair of left and right front wheels 2, 2 and the pair of right and left rear wheels 3, 3. In this configuration, the seedlings 22 can be automatically planted on the upper surface of the ridge U.

  Further, as shown in FIG. 1, a speed change lever 190 for switching the traveling speed when performing the planting operation and for switching the traveling mode is provided on the left side of the root of the left steering handle 8. Here, shift lever 190 of the present embodiment is an example of the traveling transmission of the present invention.

  The speed change lever 190 will be described later with reference to FIGS.

  The traveling section is provided with a body control mechanism 500 that moves the pair of right and left rear wheels 3 and 3 up and down with respect to the traveling vehicle body 15 to control the attitude and the vehicle height of the traveling vehicle body 15.

  The body control mechanism 500 includes a hydraulic lifting cylinder 10 that moves up and down the traveling vehicle body 15 by raising and lowering the rear wheel 3 between the traveling transmission case 9 for the pair of right and left rear wheels 3 and the traveling vehicle body 15, and A horizontal hydraulic cylinder 14 for tilting is provided. When the hydraulic lift cylinder 10 is extended and retracted, the pair of left and right rear wheels 3 move up and down by the same amount in the same direction with respect to the traveling vehicle body 15, Goes up and down.

  The hydraulic lifting cylinder 10 is fixedly provided to a hydraulic switching valve portion 40 (see FIG. 1) mounted on the upper part of the transmission case 4, and switches hydraulic pressure from a hydraulic pump mounted on the transmission case 4. The operation is performed by operating a lifting operation valve (not shown) provided in the valve section 40.

  The lifting operation valve is connected to a lifting operation lever 81 (see FIG. 12) described later via a cable 82, and a counter arm 760 (see FIG. 13) described later is connected via a rod 765. .

  On the right side of the transmission case 4, a pendulum type left / right tilt sensor 41 is provided. When the left / right tilt sensor 41 detects this, a horizontal operation valve (not shown) provided in the hydraulic pressure switching valve unit 40 is used. The driving hydraulic cylinder 14 is operated, and only the left rear wheel 3 is moved up and down to maintain the running vehicle body 15 horizontally horizontally regardless of the unevenness of the valley U.

  The machine control mechanism 500 according to the present embodiment corresponds to an example of the elevating mechanism of the present invention, and the elevating operation lever 81 of the present embodiment corresponds to an example of the elevating operation tool of the present invention.

  Next, the above-described seedling planting apparatus 300 and the seedling planting apparatus drive mechanism 400 will be further described with reference to FIGS.

  FIG. 3 is a left side view of the seedling planting apparatus 300 and the seedling planting apparatus driving mechanism 400. FIG. 4 is a schematic left side view of the seedling plant driving device 400.

  As shown in FIG. 3, the seedling planting apparatus 300 includes a planting tool 11 for planting the seedlings 22 in a field, an upper arm 311 arranged in parallel with each other for swinging the planting tool 11 in the vertical direction, and a lower arm. A swing link mechanism 310 having an arm 312 and a vertically movable arm 320 that is rotatably attached to the lower arm 312 via a first connection shaft 321 and moves the swing link mechanism 310 up and down are provided. The first connection shaft 321 is fixed to the vertically moving arm 320.

  The vertical movement arm drive shaft 440 for rotating the vertical movement arm 320 is provided so as to protrude from the seedling plant driving device driving mechanism 400, and the vertical movement arm 320 is fixed to a tip end thereof.

  Further, as shown in FIG. 3, the seedling planting device 300 includes an opening / closing arm 340 that is rotatably attached to the lower arm 312 via a second connection shaft 341 and opens and closes the planting tool 11, and a first connection shaft 321. And pivots around the second connecting shaft 341 while abutting on the outer peripheral edge of the opening / closing roller 342 that is rotatably attached via the third connecting shaft 343 to the distal end of the opening / closing arm 340. Thereby, the opening / closing cam 322 for swinging the opening / closing arm 340 in the front-rear direction, one end 351 is connected to the third connecting shaft 343 at the distal end of the opening / closing arm 340, and the other end 352 is the opening / closing mechanism for the planting tool 11. And a connection cable 350 for opening and closing connected to the 11a side.

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

  That is, as shown in FIG. 3, the swing link mechanism 310 is rotatably supported at the upper end by the upper front shaft 313a at the front upper end portion 401a of the casing 401 housing the seedling plant drive mechanism 400, and has the lower end rotatably. The front swing arm 316a rotatably connected to the connection support plate 315 via the lower front shaft 314a and the rear upper end portion 401b of the casing 401 accommodating the seedling planting device drive mechanism 400, An upper shaft provided on the connection support plate 315, comprising a rear swing arm 316b rotatably supported by the shaft 313b and a lower end rotatably connected to the connection support plate 315 via a lower rear shaft 314b. The front end of the above-mentioned upper arm 311 is rotatably connected to 316, and the front end of the above-mentioned lower arm 312 is rotatably connected to the lower rear shaft 314b of the connection support plate 315. , Each of the rear end portion of the arm 311 and lower arm 312 is pivotally connected to the rotating upper shaft 317a and the rotation under shaft 317b provided on the support plate 317 of the planting device 11.

  The seedling 22 of the present embodiment is an example of the transplant of the present invention.

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

  Further, during the planting operation, when the vertically moving arm 320 to which the first connection shaft 321 is fixed is rotated in the direction of arrow A, the opening and closing cam 322 fixed to the first connection shaft 321 is opened and closed. Since the arm 342 rotates while abutting on the outer peripheral edge of the arm 342, the opening / closing arm 340 swings (rotates) forward (counterclockwise) about the second connection shaft 341. With this operation, the one end 351 of the opening / closing connection cable 350 is pulled forward, so that the opening / closing mechanism 11a operates to open the implant 11.

  Further, when the opening / closing arm 340 swings (rotates) backward (clockwise) about the second connection shaft 341, the implanting tool 11 provided in the opening / closing mechanism 11 a is always urged in a closing direction. One end 351 of the opening / closing connection cable 350 is pulled backward by the action of the urging spring (not shown), and the opening / closing mechanism 11a operates to close the implant 11.

  With the above-described configuration, the structure of the vertical movement arm 320, the opening / closing arm 340, and the opening / closing cam 322 can be made compact, and the planting operation can be performed smoothly.

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

  As shown in FIG. 4, the seedling driving device driving mechanism 400 includes a first gear 410 for transmitting the driving force of the planting operation output from the planting transmission device 18 to the planting clutch 420, and a first gear 410. When the planting clutch 420 is in the "on" state, which switches the transmission to the vertical movement arm drive shaft 440 to the "on" state or the "off" state by receiving the driving force from the A second gear 430 receiving a driving force from a transmission gear 421a fixed to a transmission shaft 421 of the planting clutch 420, and a small-diameter gear 430a fixed coaxially with the second gear 430. And a third gear 450 fixed to the vertically movable arm drive shaft 440 for transmitting a driving force to the vertically movable arm drive shaft 440 in mesh with each other. Here, the transmission shaft 421 of the planting clutch 420 is stopped without rotating when the planting clutch 420 is in the “disengaged” state, and does not transmit the driving force to the second gear 430.

  Note that a conventional fixed-position stop clutch may be used as the planting clutch 420 of the present embodiment.

  As shown in FIG. 4, the seedling planting device drive mechanism 400 is provided on the transmission downstream side of the planting clutch 420 and is fixed to the vertically moving arm drive shaft 440. An intermittent cam 441 having a concave portion 441a formed in a part of a circular outer peripheral portion for forcibly switching to a "disengaged" state, and whether the one end 460a is separated from or comes into contact with the planting clutch 420. A second arm 460, which is rotatably supported at a rotation fulcrum 461 and has a substantially “H” shape in side view, for switching between the engaged state and the disengaged state of the planting clutch 420. ing.

  Further, as shown in FIG. 4, the seedling plant driving mechanism 400 sucks the other end 460 b of the first arm 460 in the direction of arrow B via the movable plate 472 against the pulling force of the tension spring 480. Thus, the solenoid 470 that rotates the one end 460a of the first arm 460 in the direction of arrow C about the rotation fulcrum 461 to switch the planting clutch 420 from the “off” state to the “on” state. In order to effectively apply the suction force of the solenoid 470 to the switching operation of the planting clutch 420 to the “engaged” state, a long slot 471 a for adjusting the mounting position of the solenoid 470 is provided. One end portion 462 a is fixed to a solenoid fixing plate 471 fixed at a position below the casing 401 and a rotation fulcrum 461 of the first arm 460. Is, the other end portion in conjunction with the operation of the first arm 460 462b is provided with a second arm 462 that abuts the outer peripheral edge portion of the intermittent cam 441, a.

  Further, the above-described tension spring 480 presses the first arm 460 in the direction in which the planting clutch 420 is in the “disengaged” state, and presses the other end 462 b of the second arm 462 against the outer peripheral edge of the intermittent cam 441. It is a spring for urging in the direction.

  Note that the solenoid 470 of the present embodiment is an example of the driving device of the present invention.

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

  In addition, the first arm 460 and the second arm 462 are configured to rotate integrally about a rotation fulcrum 461, and the rotation fulcrum 461 is intermittently moved from the transmission shaft 421 of the planting clutch 420 by the intermittent cam 441. By arranging them on the side, the first arm 460 and the second arm 462 can be configured rationally and compactly.

  Further, by disposing the heavy solenoid 470 below the casing 401, the center of gravity of the seedling transplanter 1 can be reduced.

  Next, with reference to FIG. 4, the items from the item A to the item A will be described, focusing on the operation of the planting clutch 420 and the intermittent cam 441 for turning on and off the transmission to the vertically moving arm drive shaft 440 in the seedling planting device drive mechanism 400. Each of the three scenes C will be described.

  A. When the solenoid 470 is energized (short-time energization by a pulse signal), the movable plate 472 at the tip of the solenoid 470 is attracted in the direction of arrow B against the tensile force of the extension spring 480, and the first arm 460. One end 460a of the second arm 462 and the other end 462b of the second arm 462 rotate counterclockwise (see the arrow C in FIG. 4) about the rotation fulcrum 461.

  As a result, the one end 460a of the first arm 460 separates from the planting clutch 420, whereby the following operations i) and ii) are performed.

  i) When the planting clutch 420 is in the “engaged” state and the transmission shaft 421 rotates, a driving force is transmitted to the second gear 430 side, and the vertically moving arm driving shaft 440 is transmitted via the third gear 450. Starts rotating, and ii) the other end 462b of the second arm 462 separates from the concave portion 441a formed on the outer peripheral edge of the intermittent cam 441 (until immediately before this, the other end 462b of the second arm 462). Is located in the concave portion 441a of the intermittent cam 441, the planting clutch 420 is in the "disengaged" state, and the vertically moving arm drive shaft 440 has stopped rotating), along the convex outer peripheral edge 441b. Meanwhile, the intermittent cam 441 and the vertically moving arm 320 keep rotating.

  That is, although the energization to the solenoid 470 has already been stopped and the suction force to the arrow B has not been generated, the other end 462b of the second arm 462 is connected to the convex outer peripheral edge 441b of the intermittent cam 441. Since the one end 460a of the first arm 460 is separated from the planting clutch 420 while the state along is maintained, the planting clutch 420 can maintain the "on" state. The rotation of the vertical movement arm 320 causes the planting tool 11 (see FIG. 3) to move up and down (planting operation) until the intermittent cam 441 makes one rotation. The planting operation is performed only once.

  B. Thereafter, when the intermittent cam 441 makes one rotation and the other end 462b of the second arm 462 reaches the concave portion 441a of the intermittent cam 441, the first arm 460 is rotated clockwise by the tensile force of the extension spring 480. While moving, the one end 460a of the first arm 460 comes into contact with the planting clutch 420, whereby the following operations i) and ii) are performed.

  i) The planting clutch 420 is in the “disengaged” state, and since the rotation of the transmission shaft 421 stops, the driving force is not transmitted to the second gear 430 side, so the vertical movement arm drive shaft 440 stops rotating. And ii) the other end 462b of the second arm 462 remains in the recess 441a formed on the outer peripheral edge of the intermittent cam 441 (until immediately before this, the other end 462b of the second arm 462 is intermittent). The planting clutch 420 is in the “engaged” state along the convex outer peripheral edge 441 b of the cam 441, and the vertically moving arm drive shaft 440 continues to rotate), the intermittent cam 441 and the vertically moving arm 320. Since the rotation continues to stop, the implanter 11 (see FIG. 3) continues to stop the vertical movement (planting operation).

  C. Further, thereafter, when the solenoid 470 is energized at an arbitrary timing, the planting clutch 420 is in the “engaged” state, and the operation described in the item A is started.

  According to the above configuration, by controlling the above-mentioned arbitrary timing of energizing the solenoid 470, the time during which the vertical movement (planting operation) of the planting tool 11 is stopped can be adjusted. This allows intermittent planting with a simple configuration.

  The timing at which the solenoid 470 is energized, that is, the operating cycle of the solenoid 470, is determined by the operator between the plantings and the running speed ("planting 1 (low speed)" or "planting 2 (high speed)" described later). Is determined by the control unit 800 based on This will be further described later mainly with reference to FIGS.

  Next, with reference to FIGS. 5 and 6, further description will be made focusing on the above-described shift lever 190. FIG.

  FIG. 5 is a perspective view of the transmission lever 190, and FIG. 6 is a schematic sectional view illustrating a transmission gear mechanism of the transmission case 4.

  As shown in FIG. 5, the speed change lever 190 switches between three traveling modes of “forward” traveling, “neutral (stop)”, and “reverse” traveling, and sets a low traveling speed when performing planting work. This is a lever for switching between “planting 1” and “planting 2” for setting a higher running speed, and is configured so that an operator can manually turn.

  Further, a tip end portion of the shift lever 190, that is, a shift lever end portion 191 opposite to the knob 192, which is a portion to be gripped by an operator's hand, is connected to one end of a shift gear mechanism of the transmission case 4.

  The transmission gear mechanism is provided with a pair of large and small gears 194 slidably held on a shaft 193 and slidably parallel to the shaft 193, and has one end 196 a protruding outside the transmission case 4 and the other end Are formed with five through holes 196b. A gear shift plate 195 for slidingly moving a pair of large and small gears 194 is fixed in the middle of the rod-shaped shift shifter 196, and the opening of the through hole 196b is pressed by a spring 196c. And a steel ball 196d arranged at a predetermined position, and on one end side 196a of the shifter 196, the shifter 196 can be shifted in the axial direction in conjunction with the turning operation of the shift lever 190. A connecting plate 19 fixed to the shift lever end 191 and protruding in a direction perpendicular to the rotation axis of the shift lever end 191. It is connected to the tip portion 197a.

  Further, a protruding portion 197b is formed at the root of the connecting plate 197. Then, in order to detect the switching of the traveling speed when performing the planting operation by the shift lever 190, the respective switch movable plates 198a of the first shift switch 198 and the second shift switch 199 disposed near the projection 197b. 199a can be pressed or not pressed by the projection 197b according to the rotational position of the shift lever 190.

  That is, when the shift lever 190 is switched to “planting 1” in which planting work is performed at a low traveling speed, the first shift switch 198 is turned on and the second shift switch 199 is turned off.

  On the other hand, when the shift lever 190 is switched to “planting 2” in which planting work is performed at a high traveling speed, the first shift switch 198 is turned off and the second shift switch 199 is turned on.

  When the shift lever 190 is switched to the position of the “neutral (stop)” mode, the first shift switch 198 is turned off and the second shift switch 199 is turned on.

  Further, regardless of whether the shift lever 190 is set to the “forward” mode or the “reverse” mode, the first shift switch 198 is turned off and the second shift switch 199 is turned off.

  In any case, since the ON information or the OFF information is transmitted from each switch to the control unit 800, the control unit 800 determines whether “planting 1” is set by the shift lever 190 or “planting”. It is possible to determine whether "Appendix 2" is set or the "neutral (stop)" mode is set (see FIG. 14).

  In the present embodiment, the control unit 800 determines that the shift lever 190 is set to the “neutral (stop)” mode, so that when the traveling vehicle body 15 stops traveling, The control unit 800 issues an energization command to the solenoid 470 to put the planting clutch 420 in the "ON" state, thereby making it possible to operate the planting tool 11, and to confirm transmission of the planting tool 11 in the neutral mode. It is effective.

  The use of the determination result by the control unit 800 for control between planted strains and the like will be further described later.

  The positions of the connecting plate 197 and the pair of large and small gears 194 shown in FIG. 6 are set when the shift lever 190 is set to the “forward” traveling mode and when the shift lever 190 is set to the “reverse” traveling mode. , And both cases are drawn with solid lines.

  With the above-described configuration, the shift lever 196 slides in the axial direction according to which of the five modes from “forward” to “reverse” shown in FIG. This causes the pair of large and small gears 194 to slide and change the gear (not shown) to be connected.

  Next, with reference to FIGS. 7A, 7B, and 8, the above-described tray supply device 100 will be further described.

  FIG. 7A is a perspective view of the tray supply device 100, and FIG. 7B is an enlarged perspective view of a portion X in FIG. 7A. FIG. 8 is a schematic side view showing the configuration of the tray vertical feeding device 120 of the tray supply device 100.

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

  The tray supply device 100 includes a seedling table 110 having a tray conveyance path 111 inclined forward and 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 conveyance path 111. 120, 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 and right direction, and a seedling feed transmission case 180 (FIG. 2) containing a vertical feed drive chain belt 181 and a gear mechanism 182. 2).

  In addition, the tray vertical feed device 120 feeds the tray 20 by one horizontal row of the seedling raising pot 21 by entering the space between the seedling raising pots 21 protruding from the back side of the tray 20 and moving downward, After that, the tray feeding rod 121 is configured to move out of the space between the seedling raising pots 21 and move upward by one horizontal row of the seedling raising pots 21. The tray feed rod 121 is configured such that a central portion 121a can enter and exit a retreat groove 111a provided at a lower portion of the tray transport path 111, and both end portions 121b are bent at a right angle to be outward from both sides of the tray transport path 111. The tray 20 is positioned so as not to hinder the tray 20 from moving on the tray transport path 111.

  Further, the tray supply device 100 includes a pair of left and right rod guide plates 112 for restricting the movement of the tray feed rod 121 at the end surfaces on both sides of the tray conveyance path 111 on the downstream side of the evacuation groove 111a. I have. At the upper end of the rod guide plate 112, a cut-out portion 112a is formed at both ends of the central portion 121a of the tray feed rod 121, into which protruding portions 121ab protruding downstream can enter (FIG. 7B). reference).

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

  The tray transport path moving device 170 is provided on the back side of the tray transport path 111, and moves the seedling table 110 having the tray transport path 111 in the left-right direction by obtaining a driving force from the main body side of the seedling transplanter 1. It has a lead cam shaft 171 and a guide rail 155 provided above the lead cam shaft 171 to guide the lateral movement of the seedling table 110 having the tray transport path 111.

  Note that the tray transport path moving device 170 of the present embodiment is an example of a horizontal feed device of the present invention, and the tray vertical feed device 120 of the present embodiment is an example of a vertical feed device of the present invention.

  Further, the tray transport path 111 is supported by a lead cam shaft 171 and a guide rail 155 provided on the upper inside of the tray transport path 111 for guiding lateral movement. As a result, the guide rail 155 supports the tray transport 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 mounting table 110 so as to be sandwiched between the tray transport 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 20 is intermittently vertically fed obliquely downward along the tray conveyance path 111 by rotating the tray feed rod 121 while drawing a substantially rectangular locus A in a side view.

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

  By the way, the extraction device 200 is arranged at a position facing the lower end of the seedling holder 110, and the tip of the extraction claw 210 operates so as to draw a locus K, and sequentially moves from the seedling raising pot 21 moving in the lateral direction. , The seedlings 22 are taken out and supplied to the planting device 7.

  Next, mainly with reference to FIG. 9 and FIG. 10, a description will be given focusing on the configuration of the extracting device 200 provided in the seedling transplanting device 1 of the present embodiment.

  9 is a schematic perspective view of the take-out device 200, and FIG. 10 is a schematic side view of the take-out device 200 when viewing the lower right front side from the upper left back side of the paper surface of FIG.

  As shown in FIGS. 9 and 10, the take-out device 200 is rotatably held by a take-out device fixing member 201 fixed to the main body of the seedling transplanter 1, and is connected to a main body-side drive source via a chain belt 202. A drive arm 220 that is turned in the same direction by a drive shaft 203 that is turned in the direction of arrow B by power, a connecting arm 230 in which one end 230a is rotatably connected to the tip side 220a of the drive arm 220, A plate-like member which is held by the take-out device fixing member 201 by fixing pins 201a and 201b and has an outer shape in the shape of a letter "J" of a substantially alphabetical shape, the side closer to the tray supply device 100 is linear and the far side is substantially R-shaped. And a guide portion 240 having a guide groove 241 having a raised shape.

  Further, the take-out device 200 includes a first guided member 245 integrated with a cam shaft 271 described later, which is inserted into the guide groove 241 so as to be able to slide smoothly without rattling, and a second guided member. The substrate 250 has a bent portion 251 that is connected to the member 247 and protrudes from one end of the side surface to which the guided members are connected, and is bent substantially at a right angle, and vertically protrudes from the bent portion 251 of the substrate 250 to rotate. A seedling pot in which a pair of left and right extraction claw holding pins 252L and 252R movably held and a root portion are attached to the pair of left and right extraction claw holding pins 252L and 252R, respectively, and the width of the tip is reduced to a tweezer shape. The pair of extraction claws 261L and 261R for extracting the seedlings 22 from the inside 21 and the pair of extraction claws 261L and 261R are located at the bases of the opposing inner surfaces. A take-out member 260 and a spring 263 pulling the opposite ends is mounted, and a.

  The unloading device 200 is a cam 270 having a cam shaft 271 that is rotatably penetrated through the substrate 250 and is integral with the first guided member 254. When contacting the tip 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, the outer peripheral portion 272 whose thickness varies depending on the location of the outer peripheral portion. And an outermost edge 273 whose outer diameter varies depending on the location of the outermost edge of the cam 270 from the center of the camshaft 271 (also referred to as the outer diameter). The cam 270 is rotatably connected to the substrate 250, and is taken out of the seedling raising pot 21 along the pair of extraction claws 261 </ b> L and 261 </ b> R due to a change in the outer diameter of the outermost edge 273 of the cam 270. Take-out pawl 261L, and a, a pushing mechanism 280 for pushing the seedlings 22 held by 261R.

  Further, an edge 245 a near the distal end of the first guided member 245 integrated with the cam shaft 271 is rotatably connected to the other end 230 b of the connecting arm 230. In addition, the first guided member 245 integrated with the cam shaft 271 is driven by the rotational force of the drive arm 220 via a transmission mechanism 290 including a first gear 291, a second gear 292, and a third gear 293. The driving arm is rotated to transmit a driving force to the camshaft 271 in accordance with the driving cycle of the driving arm 220.

  Also, when the outer peripheral portion 272 of the cam 270 comes into contact with the distal end surfaces of a pair of left and right nail distal end width regulating projections 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 is removed. In this configuration, the pair of extraction claws 261L and 261R is opened and closed by interaction between a change in thickness and a restoring force of the extension 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. The third gear 293 is fixed to the distal end 245b of the first guided member 245 integral with the camshaft 271. The edge 245a near the distal end of the first guided member 245 is connected to the connecting arm 230. The third gear 293 is rotatably held with respect to the connecting arm 230 because the third gear 293 is rotatably connected to the other end 230b of the third arm 229. Therefore, the third gear 293 rotates integrally with the first guided member 245. Further, the second gear 292 is rotatably mounted at the center position of the connection arm 230, is sandwiched by both the first gear 291 and the third gear 293, and is fitted with both gears.

  Next, the pushing mechanism 280 will be further described mainly with reference to FIG.

  The push-out mechanism 280 pushes out the seedlings 22 held by the pair of extraction claws 261L and 261R. The tip 281a is bent at a right angle to form a cutout 281b corresponding to the width of the tip of the extraction claws 261L and 261R. An extruding rod 281 and a connecting rod 282 bent at a substantially right angle, one end 282 a of which is rotatably inserted into a rear end hole 281 c provided at the rear end of the extruding rod 281. A connecting rod 282 held by a warp pin (not shown) for preventing it from coming off, and the other end 282b of the connecting rod 282 are fixed to an upper end 283a, and the lower end 283b is connected to the substrate 250 by an extruding arm connecting shaft 283d. A push-out arm 283 rotatably mounted and provided with a tension spring holding first projection 283c at the center, and one end having a tension spring holding first projection. Hooked to 83c, the other end is provided with a spring 284 pulling the push-out arm hooked to the second projection 250a for the tension spring held fixed to the substrate 250.

  When the cam 270 rotates in the direction of arrow B, the outermost edge 273 has a projection 273b having an outer diameter larger than that of the other portion 273a, and the outer peripheral edge of the root of the first projection 283c for holding a tension spring. , The push-out arm extension spring 284 is extended, the push-out arm 283 is rotated counterclockwise in FIG. 10, and the push-out rod 281 connected by the connecting rod 282 is retracted. (See arrow C). When the cam 270 rotates in the direction of arrow B, another portion 273a of the outermost edge portion 273 having an outer diameter smaller than that of the protruding portion 273b is formed on the outer peripheral edge of the root of the first projection 283c for holding the tension spring. , The push-out arm extension spring 284 is contracted, the push-out arm 283 is rotated clockwise in FIG. 10, and the push-out rod 281 connected by the connecting rod 282 protrudes (arrow). D). Each time the push rod 281 protrudes, the tip of the pair of extraction claws 261L and 261R passes through the notch 281b provided at the tip 281a of the push rod 281. In this configuration, the soil and the like that had been removed are removed.

  Here, the push rod 281 has an upper portion configured in a planar shape, which can prevent the leaves of the seedling 22 from getting entangled in the pair of extraction claws 261L and 261R.

  Next, the operation of the unloading 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 removal device fixing member 201 fixed to the main body of the seedling transplanter 1.

  The connection arm 230 swings with the rotation of the drive arm 220, and the movement is caused by the first guided member connected to the substrate 250 through the guide groove 241 formed in the guide portion 240. 245.

  On the other hand, with the movement of the connecting arm 230, the substrate 250 also swings. In the substrate 250, in addition to the first guided member 245, the second guided member 247 passes through the guide groove 241. (However, the second guided member 247 is not connected to the connection arm 230), and 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 tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R are shown in FIGS. Draw the trajectory K.

  Here, FIG. 11 is a schematic diagram showing a schematic correspondence between the rotational position of the drive arm 220 and the positions on the trajectory K of the distal ends 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. 11 correspond to the positions K1 to K6 on the trajectory K of the tips 261Lp and 261Rp of the pair of extraction claws 261L and 261R. The arrow on the broken line indicating the trajectory K indicates the operation direction.

  As shown in FIG. 11, the operation in which the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R move from the position K1 to the position K2 corresponds to an operation of extracting the seedling 22 from the seedling raising pot 21. Since the trajectory 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 raising pot 21. At this time, due to the restoring force of the tension spring 263, forces approaching each other are acting on the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R, and the seedlings 22 extracted from the seedling raising pot 21 are held. Can be done. The opening and closing operations of the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R will be further described later together with the operation of the push rod 281.

  In addition, the operation | movement which the front-end | tip part 261Lp, 261Rp of a pair of extraction nail | claw 261L, 261R goes from the position K6 to the position K1 WHEREIN: A pair of extraction nail | claw with respect to the seedling 22 in the seedling raising pot 21 of the tray 20 in a seedling extraction position. 261L and 261R are inserted, and move in the opposite direction along a path substantially the same as the trajectory K from the position K1 to the position K2. Therefore, the tips 261Lp and 261Rp of the pair of extraction claws 261L and 261R are It is inserted almost straight into the pot 21. At this time, a force in a direction away from each other acts on the distal ends 261Lp, 261Rp of the pair of extraction claws 261L, 261R against the restoring force of the tension spring 263, and the distal ends are opened. Can enter the nursery pot 21.

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

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

  Next, as going from the position K2 to the position K3, the tip portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R rapidly change their posture substantially downward from the posture facing the seedling raising pot 21 until then. When moved to the position K4, the distal ends 261Lp and 261Rp are oriented almost directly below.

  The reason why the posture is suddenly changed substantially downward in this manner is that the side of the guide groove 241 far from the tray supply device 100 is formed in a substantially R-shaped upright shape.

  At that time, just below the tips 261Lp and 261Rp, the seedling input port (not shown) of the planting device 7 in the ascending process on the trajectory T1 (see FIG. 1) toward the top dead center is directed upward. And between the position K4 and the position K5, the seedling 22 pushed out from the tip 261Lp, 261Rp of the pair of extraction claws 261L, 261R by the push rod 281 falls into the seedling insertion port of the planting apparatus 7, It is supplied to the implant 11. The operation of the push rod 281 will be further described later.

  Next, as going from the position K5 to the position K6, the tip portions 261Lp and 261Rp of the pair of extraction claws 261L and 261R are sharply postured so that the posture that has been directed substantially downward until now can be opposed to the next seedling raising pot 21. Are changed to the position K1, the tips 261Lp and 261Rp are inserted into the new seedling raising pot 21.

  As can be seen from the approximate correspondence between the rotational position of the drive arm 220 and the positions on the trajectory K of the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R shown in FIG. Is performed more slowly than the above-described operation from the position K1 to the position K2, so that the removal of the seedlings 22 from the seedling raising pot 21 can be performed quickly, and the release of the seedlings 22 to the planting device 7 is ensured. Can be done.

  Such an operation is performed because the connecting arm 230 is provided on the front side (withdrawal position of the tray supply device 100) from the drive arm 220. Further, since the drive arm 220 is farther from the extraction position of the tray supply device 100 than the connection arm 230, the drive arm 220 does not come into contact with the seedlings 22 when the seedlings 22 are taken out and does not become an obstacle.

  Next, the operation of the transmission mechanism 290 and the push-out mechanism 280 will be mainly described mainly with reference to FIGS. 9, 10, and 11.

  As shown in FIG. 9, the first gear 291 fixed to the distal end portion 220 a of the drive arm 220 by the rotation of the drive arm 220 in the B direction causes the first gear 291 to move in the B direction around the rotation fulcrum 220 b of the drive arm 220. Revolve. The first gear 291 is rotatably attached to the connection arm 230 via a 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 245b of the first guided member 245 that is integral with the camshaft 271 and the edge 245a near the distal end of the first guided member 245 is connected to the connecting arm 230. Is rotatably connected to the other end portion 230b of the first cam 270, so that the cam 270 rotates in the B direction via the cam shaft 271 by the rotation of the third gear 293. 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 outer diameter of the protruding portion 273b in the outermost edge portion 273 is larger than that of the other portion 273a, and the thickness of the first range 272a in the outer peripheral portion 272 at the same distance from the axis center of the cam shaft 271 is , Is set to be 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, 261Rp of the pair of extraction claws 261L, 261R move from the position K6 toward 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 when performing the operation 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 regulating projections 262L and 262R, so that the pair of extraction claws 261L and 261R are formed. The distal ends 261Lp and 261Rp of the pair have a force acting in a direction away from each other against the restoring force of the extension spring 263, and both distal ends are open.

  On the other hand, at this time, since the protruding portion 273b of the outermost edge portion 273 of the cam 270 is in contact with the outer peripheral edge of the root portion of the first projection 283c for holding the extension spring, the extension arm extension spring 284 is pulled. The pushing arm 283 is extended, and rotates in a counterclockwise direction in FIG. 10 (see the arrow C), and the pushing rod 281 connected by the connecting rod 282 is maintained in a retracted state.

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

  Next, when the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R perform an operation from the position K1 toward the position K2, the opening and closing operation of the distal ends 261Lp and 261Rp of the pair of extraction claws 261L and 261R 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 to 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 in contact with the tip surfaces of the pair of right and left claw tip width regulating projections 262L and 262R. By contact, the distal ends 261Lp, 261Rp of the pair of extraction claws 261L, 261R move in directions approaching each other due to the restoring force of the tension spring 263, and both distal ends are closed.

  On the other hand, at this time, since the protruding portion 273b of the outermost edge portion 273 of the cam 270 is still in contact with the outer peripheral edge of the root portion of the first projection 283c for holding the extension spring, the pushing arm extension spring 284 is moved. The pushing arm 283 is extended, and maintains a state of being rotated counterclockwise in FIG. 10 (see arrow C), and maintains a state where the pushing rod 281 connected by the connecting rod 282 is retracted. I have. Therefore, the tips 261Lp, 261Rp of the pair of extraction claws 261L, 261R can hold the extracted seedling 22 firmly at the tips, and move toward the planting device 7 as it is.

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

  That is, at the same time when the operation from the position K4 to the position K5 is started, the other portion 273a of the outermost edge portion 273 of the cam 270 is replaced with the outer peripheral edge of the root of the first projection 283c for holding the tension spring. 10, the push-out arm 283 is instantaneously turned clockwise in FIG. 10 by the restoring force of the push-out arm extension spring 284 (see the arrow D) in FIG. At the same time as the rod 281 is pushed out, the notch 281b of the tip 281a of the push rod 281 moves while pushing and expanding the tip of the pair of extraction claws 261L and 261R.

  Thereby, the seedlings 22 pushed out from the tip parts 261Lp, 261Rp of the pair of extraction claws 261L, 261R by the tip part 281a of the push rod 281 fall to the seedling insertion port of the planting device 7 and are supplied to the planting tool 11. Is done. At this time, the notch 281b of the distal end 281a of the push rod 281 moves while pushing and expanding the distal ends of the pair of extraction claws 261L and 261R, so that the soil and the like attached to the distal ends are simultaneously removed. It is.

  Next, when the distal ends 261Lp, 261Rp of the pair of extraction claws 261L, 261R perform an operation from the position K5 toward the position K6, the opening and closing operation of the distal ends 261Lp, 261Rp of the pair of extraction claws 261L, 261R, and the extrusion. The operation of the rod 281 is as follows.

  That is, of 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, comes into contact with the tip surfaces of a pair of right and left claw tip width regulating projections 262L, 262R. As a result, the distal ends 261Lp, 261Rp of the pair of extraction claws 261L, 261R change in a state in which both distal ends are opened by a force in a direction away from each other acting against the restoring force of the tension spring 263. I do.

  On the other hand, when it comes near the position K6, the protruding portion 273b of the outermost edge portion 273 of the cam 270 replaces the other portion 273a and comes into contact with the outer peripheral edge of the root portion of the first projection 283c for holding the tension spring. As a result, the push-out arm extension spring 284 is extended, the push-out arm 283 is rotated counterclockwise in FIG. 10 (see arrow C), and the push-out rod 281 connected by the connecting rod 282 is retracted. Change to a state.

  In the above-described embodiment, a case has been described in which the pair of extraction claws 261L and 261R are integrally formed of the same metal plate member from the root portion to the tip portion. However, the present invention is not limited to this. The distal end may be made of a detachable and elastic rubber plate or resin plate, for example. As a result, even if the distal end portion grips the seedling 22 by the restoring force of the extension spring 263, the rubber plate is deformed by the elasticity of the distal end side, so that the seedling 22 is not crushed.

  Further, the push rod 281 covers the tops of the pair of extraction claws 261L, 261R and 261Rp until the distal ends 261Lp, 261Rp of the pair of extraction claws 261L, 261R move to the vicinity of the position K6. With this configuration, when moving from the position K5 to the position K6, it is possible to prevent the leaves of the seedlings 22 on the tray 20 from being caught on the tips 261Lp, 261Rp of the pair of extraction claws 261L, 261R.

  In addition, the push rod 281 is configured to retreat in accordance with the insertion speed when the distal end portions 261Lp, 261Rp of the pair of extraction claws 261L, 261R are inserted into the seedling raising pot 21. Can be prevented from becoming entangled with the ends 261Lp and 261Rp.

  Next, the mechanism for intermittently driving the tray feed rod 121 of the tray supply device 100 will be further described with reference to FIGS. 7 and 8 again.

  As shown in FIG. 8, in the tray vertical feed device 120, (1) the above-described tray feed rod 121 and (2) the upper end portions 121 b 1 of both end portions 121 b of the tray feed rod 121 are fixed, and one of them is curved inward. A feed rod arm 130 having a protruding cam 131 having a curved edge 131a formed at a lower portion thereof, and (3) a root 141 is rotatably supported by the side plate 110a of the seedling placement table 110, and a tip shaft at a tip portion. A feed arm 140 rotatably supporting the feed rod arm 130 at 142, a feed arm 140 having a first concave portion 143a, a second convex portion 143b, and a third concave portion 143c formed smoothly and continuously in a side view at a lower end edge; (4) The longitudinal feed drive shaft 151 that rotates in the direction of arrow E by the driving force obtained from the power source of the seedling transplanter 1, when viewed from the extraction device 200 side, the center position and the right end position of the longitudinal feed drive shaft 151. Each fixed in two places includes a longitudinal feeding drive arm 150 having a restraining roller 152 rotatably to the tip portion.

  A feed arm tension spring is provided between the tip shaft 142 of the tip of the feed arm 140 and the lower part 110a1 of the side plate 110a of the seedling holder 110 so that a downward pulling force is always applied to the feed arm 140. 160 are attached. A spring mounting rod 163 for holding the other end of the feed rod arm extension spring 161 having one end attached to a pin 132 attached to the upper end of the feed rod arm 130 is fixed to the base 141 of the feed arm 140. Have been.

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

  It is assumed that the rotation of the lead cam shaft 171 causes the seedling placement table 110 to move rightward, that is, in the direction of arrow F (see FIG. 7). At this time, the vertical feed drive shaft 151 is rotating in the direction of arrow E (see FIG. 8).

  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 device 7, and thereafter, when the seedling placement table 110 moves to the rightmost end, the leftmost end The seedling 22 of the seedling raising pot 21 is taken out by the take-out device 200. As a result, all the seedlings 22 in one horizontal row of the seedling raising pot 21 have been taken out.

  At this time, a pulling roller rotatably attached to the tip of a vertical feed drive arm 150 fixed to the right end of the vertical feed drive shaft 151, which is rotated in the direction of arrow E together with the vertical feed drive shaft 151. 152 starts contact with the first concave portion 143a of the feed arm 140 and then starts contact with the curved edge 131a of the feed rod arm 130 with a slight delay. After once ascending with the clockwise rotation of 140, it starts to rotate counterclockwise around the tip shaft 142a at the tip.

  That is, the tray feed rod 121 once moves upward in the direction of the arrow 121a0 (see FIGS. 7B and 8), and is thus held in the notch 112a (see FIG. 7B). The protrusion 121ab (see FIG. 7B) of the tray feed rod 121 comes out of the notch 112a, and the central part 121a of the tray feed rod 121 which has been waiting in the gap 21a on the back side of the seedling growing pot 21 until then. Moves upward in the direction of arrow 121a0 within the range of the gap 21a. Thereafter, when the feed rod arm 130 starts to rotate counterclockwise around the distal end shaft 142 at the distal end, the central portion 121a of the tray feed rod 121 moves in the direction of arrow 121a1 (see FIG. 8). Moving. The notch depth of the notch 112a is set to such an extent that the central portion 121a of the tray feed rod 121 can move within the gap 21a.

  Thereafter, when the traction roller 152 further rotates, the traction roller 152 keeps in contact with the curved edge 131a of the feed rod arm 130, so that the central portion 121a of the tray feed rod 121 is located at the evacuation groove 111a. The state that has been maintained. At this time, at the same time, the restraining roller 152 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 becomes As a result, it moves in the direction of the arrow 121a2 (see FIG. 8) while maintaining the state of being located in the retreat groove 111a.

  Thereafter, as the restraining roller 152 continues to rotate, the restraining roller 152 is brought into a non-contact state with the curved edge 131a of the feed rod arm 130, and at the same time, the feed rod arm 130 is restored by the restoring force of the feed rod arm extension spring 161. By instantaneously rotating clockwise about the distal end shaft portion 142 of the distal end portion, the central portion 121a of the tray feed rod 121 is moved from the gap 21a toward the gap 21b located one row above the seedling raising pot 21 toward the upper side. , Move as shown by the arrow 121a3.

  Thereafter, when the restraining roller 152 further rotates, the restraining roller 152 moves while being in contact with the third concave portion 143c of the feeding arm 140. Therefore, the feeding arm 140 is moved downward by the restoring force of the feeding arm extension 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. 8) while maintaining the state of being located in the gap 21b, and the central portion 121a of the tray feed rod 121 The protrusion 121ab of 121a is held by the notch 112a.

  Then, the central portion 121a of the tray feed rod 121 moved in the direction of the arrow 121a4 (see FIG. 8) maintains a state of being located in the gap between the seedling raising pots on the back side of the seedling raising pot 21, and When the movement starts in the direction of arrow G, that is, in the left direction, the take-out device 200 sequentially takes out the seedlings 22 from the seedling raising pot 21 at the left end and supplies the seedlings 22 to the planting device 7. At the time of the transfer, the seedlings 22 of the rightmost seedling raising pot 21 are taken out by the take-out device 200. As a result, all the seedlings 22 in one horizontal row of the seedling raising pot 21 have been 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 weight of the seedling 22 placed in the seedling raising pot 21 causes the tray 20 to move downward. Can be prevented.

  When all the seedlings 22 in one horizontal row of the seedling raising pot 21 have been taken out, unlike the above, the seedlings 22 are rotatably attached to the distal end of the vertical feed drive arm 150 fixed to the center position of the vertical feed drive shaft 151. The drag roller 152 starts to contact the curved edge 131a of the feed rod arm 130 with the first recess 143a of the feed arm 140.

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

  Thereby, the tray vertical feeder 120 having a compact structure is obtained. Further, the tray transport path 111 can be supported to be able to move 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 portion 111b of the tray transport path 111, the tray 20 does not bend inward. Since the trays 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 portion 111b of the tray transport 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 at the time of tray feed, the deflection thereof serves as resistance, and the tray 20 is prevented from shifting downstream.

  Next, various operation levers disposed near the pair of left and right handle grips 8L and 8R of the operation handle 8 and the operation section 600 will be described with reference to FIG. FIG. 12 is a plan view illustrating various operation levers arranged near the pair of left and right handle grips 8L and 8R of the operation handle 8 and the operation unit 600.

  As shown in FIG. 12, a main clutch lever 80 is provided near the left handle grip 8L of the operation handle 8, and a lifting operation lever 81 for operating the hydraulic lifting cylinder 10 is provided near the right handle grip 8R. Is provided.

  The elevating operation lever 81 is configured to be manually switchable between three stages of “lower”, “neutral”, and “raise”. When the lever is switched to the “lower” position, the hydraulic elevating cylinder 10 lowers the traveling vehicle body 15. When the lowering is stopped by the sensor plate 710 (see FIG. 13) described later and the planting on / off button 620 (see FIG. 12) described later is in the ON state, the planting clutch 420 is in the "on" state. Then, the planting operation is started.

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

  As shown in FIG. 12, the operation panel 601 includes, in order from the left end to the right end, (1) an empty planting operation button for operating only the planting tool 11 while the traveling of the traveling vehicle body 15 is stopped. 610 and (2) When the elevating operation lever 81 is operated to the lowering operation position for lowering the traveling vehicle body 15, the state where the planting tool 11 is operated in conjunction with the lowering operation, and is not interlocked with the lowering operation. A planting on / off button 620 for switching to any of the states, (3) a display unit 630 for displaying at least between planted plants, and (4) an adjustment button 640 for at least controlling between planted plants are arranged.

  In addition, since the planting on / off button 620 is electrically connected in series with the empty planting operation button 610, when the empty planting operation button 610 is turned on, the planting on / off button 620 is also turned on. The implant 11 is activated.

  Here, the display unit 630 will be further described.

  In the seedling transplanter 1 according to the present embodiment, the shift lever 190 designates “planting 1” for performing planting work at low speed traveling, or “planting 2” for performing planting work at high speed traveling. Is designated, the range between planted strains that can be displayed on the display unit 630 is different.

  Specifically, when the shift lever 190 is set to “planting 1 (low speed running)”, the range between the plantings that can be set by the operator is 22 cm to 40 cm, and the shift lever 190 is set to “planting 1”. When “2 (high-speed running)” is set, the range between the planted plants that can be set by the operator is preset in the memory unit 810 of the control unit 800 in advance to be 32 cm to 70 cm. These initial setting values are configured to be changeable. For example, when the speed ratio between “planting 1” and “planting 2” is changed, the operation unit 600 switches to a mode for changing the range between planted strains, and then uses the adjustment button 640 to change the planting stock ratio. Can be changed and set independently of each other.

  In the present embodiment, control is performed to determine whether the shift lever 190 is set to “plant 1” or “plant 2” based on output signals from the first shift switch 198 and the second shift switch 199. The unit 800 (see FIG. 14) issues a command corresponding to the determination result to the display unit 630. Thereby, the range between the planted strains that can be set by the worker is displayed.

  That is, an upper limit and a lower limit, which are ranges between planted plants that can be set by the operator, are simultaneously displayed in the left half region of the display unit 630, and the center value between planted plants is temporarily set in the right half region. The value is displayed as a value.

  The operator changes the tentative value displayed in the right half display area of the display unit 630 to a desired value within the range between the planted plants displayed in the left half display area of the display unit 630. To do so, the user operates the adjustment button 640.

  In order to realize the planting stocks set by the worker in this way, the control unit 800 determines (i) the numerical information between the planting stocks set by the adjustment button 640 and (ii) the shift lever 190 to “planting 1”. And the presence / absence of an ON signal from the first speed change switch 198 and the second speed change switch 199 to determine which of “” and “planting 2” has been set. The operating cycle of the solenoid 470 for setting the state is determined, and the solenoid 470 is energized in accordance with the determined operating cycle.

  As a result, the display unit 630 that can display the range between planted strains corresponding to the traveling speed (“planting 1 (low speed)”, “planting 2 (high speed)”) specified by the shift lever 190 is used. Thus, the operator can set an appropriate planting stock within the range between the planting stocks corresponding to the specified traveling speed.

  For example, when the running speed is set to the slow mode, planting is performed between narrow plantings. For this reason, the operating speed of the planting tool does not become extremely high, so that the planting accuracy can be improved. When the running speed is set to the high speed mode, the planting is performed between wide planting stocks. Therefore, work efficiency can be improved.

  That is, according to the seedling transplanter 1 of the present embodiment, for example, when it is desired to plant between narrow plantings, the running speed is slowed down and the operating speed of the planting tool is not extremely increased, so that the planting accuracy is improved. When it is desired to plant between wide planting stocks, the running speed can be increased and the working efficiency can be improved.

  In addition, it is possible to set an appropriate planting interval according to work conditions such as a field and a running speed.

  That is, for example, when the planting work is performed on a slope, in order to realize the same planting stock on the up slope and the down slope, it is necessary to set the planting stock in consideration of the slip of the traveling vehicle body 15. . In the present embodiment, the overlapping range is set in the range between the planting strains corresponding to both “planting 1” and “planting 2”, so that the same planting is performed on the up slope and the down slope. It becomes possible to realize between shares.

  Specifically, in the present embodiment, the range between the overlapping planted strains is 32 cm to 40 cm. Therefore, on the upward slope, the shift lever 190 is set to “planting 2 (high speed)” capable of high-speed running in consideration of slip, and the spacing between the planted plants is set to 33 cm.

  On the other hand, on the down slope, the shift lever 190 is set to “planting 1 (low speed)” capable of running at low speed in consideration of slippage, and the planting interval is set to 30 cm.

  As a result, between the actual planting strains, 31.5 cm can be realized on the upward slope and 31.5 cm on the downward slope.

  In addition, by making the adjustment range between the planted plants different between "planting 1" and "planting 2", it is possible to cope with upslope and downhill slopes, and to increase the running speed when planting between wide plants. This also has the effect of improving work efficiency.

  Note that the memory unit 810 of the present embodiment is an example of a storage unit of the present invention, and the control unit 800 of the present embodiment is an example of a determining unit of the present invention. The adjustment button 640 according to the present embodiment is an example of the inter-stock switching unit according to the present invention.

  Here, the description returns to the operation panel 601 again. That is, with the above configuration, the planting on / off button 620 is arranged near the center of the operation panel 601, so that the operation is easy.

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

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

  The adjustment button 640 is provided with an “up” push switch 640 a for changing the direction in which the stocks are widened upward and a “down” push switch 640 b for changing the direction in which the stocks are narrowed downward.

  According to the above configuration, by operating the “up” push switch 640 a and the “down” push switch 640 b, the numerical value indicating the stock is directly displayed on the display unit 630, so that the operator can easily recognize the stock.

  Next, referring mainly to FIGS. 13 and 14, a solenoid 470 for turning on and off the planting based on the operation of the planting depth adjusting mechanism 700, the planting on / off button 620, the elevating operation lever 81, and the like. A description will be given mainly of the control unit 800 that controls the operation of FIG.

  FIG. 13 is a left side view illustrating a schematic configuration of the planting depth adjustment mechanism 700, and FIG. 14 is a schematic block diagram illustrating input and output to and from the control unit 800.

  As shown in FIG. 13, the planting depth adjusting mechanism 700 includes (1) a sensor plate 710 whose bottom is gently curved, which keeps the planting depth of the seedling constant by being in contact with the field scene 701; A) a plate-like member having a substantially L-shape in side view, wherein an L-shaped bent portion is rotatably supported by the rotation support shaft 721 with respect to the traveling vehicle body 15 and one end 722 extending rearward is a sensor plate; The front end 711 of the sensor plate 710 is rotatably connected to the front end 711 of the sensor plate 710 via a rotation support shaft 722a. A depth arm 720 rotatably connected to a distal end 741 of a transmission rod 740 for transmitting the movement of a depth lever 730 for setting a position; and (3) the depth arm 720 is swingable from the main frame 17. Spring 750 to be suspended, (4) An L-shaped plate member having a substantially L-shape in plan view, wherein the L-shaped bent portion is rotatably supported by the turning support shaft 761 with respect to the traveling vehicle body 15, and a long hole is formed below the turning support shaft 761 762 is formed, and is urged by a tension spring 766 connected to the upper end portion 763 to rotate in the direction of arrow Y about the rotation support shaft 761, and provided in the hydraulic switching valve portion 40. A counter arm 760 having a front end 764 connected to a lifting operation valve (not shown) by a rod 765, and (5) a counter arm 760 is inserted into the front end of the long hole 762 of the counter arm 760 so that the detection lever 771 is positioned. The planting switch 770 arranged on the arm 760 and (6) the connecting pin 781a provided at one end 781 are inserted into the elongated hole 762, and the other end 782 is connected via the connecting shaft 783. The upper end 712 and rotatably coupled to a sensor rod 780 of capacitors plate 710, and a.

  Also, the sensor rod 780 interlocks with the swinging of the upper end 712 of the sensor plate 710 in the direction of the arrow Z due to the upward swinging of the sensor plate 710, so that the front end edge 781b of the one end 781 enters and exits. The configuration is such that the detection lever 771 is moved in the pressing direction and the planting switch 770 is turned on.

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

  Further, according to the above configuration, since the counter arm 760 is pulled by the tension spring 766 in the direction of pressing down the sensor plate 710, it is possible to eliminate rattling due to the sensor rod 780 and the counter arm 760.

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

  Next, a method of controlling the solenoid 470 by the control unit 800 provided below the operation panel 601 will be described with reference to FIG.

  As shown in FIG. 14, at least an on / off signal from the planting on / off button 620, a switching signal of the elevating operation lever 81, and an on / off signal from the planting switch 770 are input to the control unit 800. , A pulse signal is output to the solenoid 470.

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

  Here, after moving the seedling transplanting apparatus 1 to a predetermined position in the field, (1) a scene to start planting work, and then (2) a scene in which the planter runs while planting in the field, and (3) A description will be given separately for a scene where the vehicle reaches the end of the ridge and turns.

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

  Further, it is assumed that the operator sets the shift lever 190 to “planting 1”. As a result, the first shift switch 198 is turned on, the second shift switch 199 is turned off, and only the first shift switch 198 sends an ON signal to the control unit 800. The control unit 800 receives the ON signal from the first shift switch 198 and does not receive the ON signal from the second shift switch 199, and thus determines that “planting 1 (low speed)” has been set. The range “22 cm to 40 cm” between the planted strains corresponding to “planting 1 (low speed)” stored in the memory unit 810 in advance is read and displayed in the left half display area of the display unit 630.

  The operator looks at the range between the planted plants displayed on the display unit 630, confirms that 50 cm between the desired planted plants does not fall within the range, and then operates the shift lever 190, Switch to "planting 2 (high speed)". Then, the range “32 cm to 70 cm” between planted strains is displayed in the left half display area of the display unit 630, and 51 cm is displayed as a temporary value between planted strains in the right half display area. .

  The operator presses the adjustment button 640 to change the temporary value of 51 cm to the desired value of 50 cm. This completes the setting between the planted strains.

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

  When the sensor plate 710 comes into contact with the field scene 701, the front end 711 of the sensor plate 710 rotates in the arrow Z direction (see FIG. 13), so that the front edge 781b of the sensor rod 780 pushes the on / off detection lever 771. By moving and turning on the planting switch 770, an ON signal from the planting switch 770 is input to the control unit 800.

  The control unit 800 converts the signal indicating the “ON” state from the planting on / off button 620, the signal indicating the “down” position from the lifting / lowering operation lever 81, and the “ON” signal from the planting switch 770 under the AND condition. , A signal for energizing the solenoid 470 is output.

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

  That is, when the control unit 800 receives the various signals and determines that the planting conditions are satisfied, the control unit 800 switches the planting clutch 420 to the “ON” state and activates the planting tool 11. When the operator starts the planting operation by operating the elevating operation lever 81 or the like, the planting tool 11 immediately plants the first seedling. Thereby, the planting operation can be started from the end of the field.

  The configuration including the sensor plate 710 and the planting switch 770 according to the present embodiment is an example of the height detecting unit according to the present invention.

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

  Further, control unit 800 outputs a pulse signal at the operation cycle to energize solenoid 470 at a predetermined operation cycle. Therefore, when the solenoid 470 is energized, the planting clutch 420 is brought into the “on” state, and the intermittent cam 441 starts rotating and completes one rotation (that is, the planting operation of the seedling is performed once. A series of operations of returning to the "off" state (after the end) are repeated in the operation cycle.

  Thus, the planting operation is performed intermittently, and a desired planting stock is realized.

  Here, the predetermined operation cycle is controlled based on the running speed corresponding to “planting 2 (high speed)” specified by the operator and 50 cm, which is the value between the plantings selected by the operator. Determined by the unit 800. The predetermined operation cycle is counted by a timer in the control unit 800.

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

  That is, when the sensor plate 710 moves upward, the front end 711 of the sensor plate 710 moves in the direction of the arrow Z around the rotation support shaft 722a, and the connection pin 781a provided at one end 781 of the sensor rod 780 is moved. When the front edge of the long hole 762 is moved in the pressing direction, the counter arm 760 is rotated clockwise in FIG. 13 around the rotation support shaft 761, and this movement is performed via the rod 765 and the hydraulic switching valve. It is transmitted to an elevating operation valve (not shown) provided in the section 40, and the hydraulic elevating cylinder 10 operates in the extending direction, so that the vehicle height of the traveling vehicle body 15 increases.

  On the other hand, when the sensor plate 710 moves downward, the front end 711 of the sensor plate 710 moves in the direction opposite to the arrow Z direction about the rotation support shaft 722a, and the connection provided on the one end 781 of the sensor rod 780. When the pin 781a moves away from the front edge of the elongated hole 762, the tension force of the tension spring 766 causes the counter arm 760 to rotate in the direction of the arrow Y about the rotation support shaft 761 as an axis. Is transmitted to a lifting / lowering operation valve (not shown) provided in the hydraulic pressure switching valve section 40, and the hydraulic lifting / lowering cylinder 10 operates in a shorter direction, so that the vehicle height of the traveling vehicle body 15 decreases.

  By the above operation, even if the field scene 701 has irregularities, the planting depth of the seedlings can be kept constant.

(3) A scene that turns to the end of the ridge:
In this case, the operator moves the lifting operation lever 81 from the “down” position to the “neutral” position in order to interrupt the planting operation.

  Accordingly, the control unit 800 receives the signal indicating the “neutral” position from the lifting operation lever 81 and stops outputting the pulse signal to the solenoid 470. As a result, after the planting clutch 420 is switched from the “on” state to the “off” state, the planting operation is interrupted because the “off” state is maintained.

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

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

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

  Note that the planting clutch 420 maintains the “disengaged” state, and the state in which the planting operation has been interrupted is continued.

  Then, the worker turns the traveling vehicle body 15.

  Next, when the operator moves the elevating operation lever 81 from the “up” position to the “lower” position via the “neutral” position, the operator interlocks with the movement of the cable 82 according to the operation of the elevating operation lever 81, and the hydraulic pressure is increased. When the lifting operation valve provided in the switching valve unit 40 is operated and the hydraulic lifting cylinder 10 moves in a shorter direction, the vehicle height of the traveling vehicle body 15 starts to decrease. By the operation of the lifting operation lever 81, a signal indicating that the lifting operation lever 81 is at the “down” position is output to the control unit 800.

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

  Since the planting on / off button 620 remains in the “on” state, the control unit 800 outputs a signal indicating the “on” state from the planting on / off button 620, a signal indicating the “down” position from the elevating operation lever 81, When an “ON” signal is received from the planting switch 770 under the AND condition, a signal for energizing the solenoid 470 is output. That is, similarly to the above, the control unit 800 outputs a pulse signal at the operation cycle to energize the solenoid 470 at the predetermined operation cycle.

  As a result, the planting clutch 420 is switched from the “off” state to the “on” state, and the planting operation is started again.

  In this case, when the planting operation is started again by the operator operating the elevating operation lever 81 or the like, the count of the timer in the control unit 800 is reset. The planting tool 11 plants the first seedling. Thereby, the planting operation can always be started from the end of the field.

  With the above configuration, by setting the planting on / off button 620 in the “entering” state, the above-mentioned (1) planting operation is started only by operating the elevating operation lever 81, and then (2) the field A series of operations of running while planting inside the plant and (3) turning after coming to the end of the ridge, and then again planting can be performed.

  Next, a configuration in which a hydraulic pump 850 is disposed between the engine 12 and the transmission case 4 (see FIG. 2) will be described mainly with reference to FIG. FIG. 15 is a side view illustrating a configuration in which a hydraulic pump 850 is arranged between the engine 12 and the transmission case 4.

  As shown in FIG. 15, the first transmission belt 855 is hung between an engine pulley 860 rotating by receiving a driving force from the engine 12 and a transmission pulley 865 for transmitting the driving force to the main transmission case 4. I have. The second transmission belt 870 is hung between an engine pulley 860 that rotates by receiving a driving force from the engine 12 and a hydraulic pulley 875 for rotating the hydraulic pump 850.

  The first transmission belt 855 and the second transmission belt 870 are arranged side by side on the left and right.

  Further, a first tension pulley 881 for applying tension to the first transmission belt 855 is rotatably attached to a distal end portion of the first tension arm 880. A second tension pulley 883 for applying tension to the second transmission belt 870 is rotatably attached to the tip of the second tension arm 882.

  The first tension arm 880 and the second tension arm 882 are arranged side by side on the left and right, and are attached rotatably about the same shaft 885.

  With the above configuration, the configuration of the power transmission mechanism can be simplified and the size can be reduced.

  Note that, in the above-described embodiment, the case where the machine control mechanism 500 has the configuration illustrated in FIG. 2 has been described. However, the present invention is not limited thereto, and for example, the configuration illustrated in FIGS. Is also good.

  Here, FIGS. 16A to 16C are diagrams illustrating examples of another body control mechanism 900 of the body control mechanism 500, and FIG. 16A is a schematic plan view of another body control mechanism 900. FIG. 16B is a schematic side view of another machine control mechanism 900, and FIG. 16C is a schematic enlarged partial side view of a hydraulic rod device 910L, which will be described below with reference to these drawings. The same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  As shown in FIG. 16A, a cylinder rod end 901 of the hydraulic elevating cylinder 10 is connected to a horizontal punch 903 extending left and right via a spring 902. Hydraulic rod devices 910L and 910R for connecting between a pair of left and right swing arms 904 are provided at both left and right ends of the horizontal punch 903. Further, a sub cylinder 906 is disposed diagonally between the left hydraulic rod device 910L and the horizontal punch 903.

  As shown in FIG. 16B, the swing arm 904 swings back and forth around the rotation shaft 905 in response to the swing of the hydraulic rod device 910 in the front and rear direction, and in conjunction with this, the traveling transmission case 9 Is rotated so that the rear wheel 3 swings up and down.

  As shown in FIG. 16C, the hydraulic rod device 910 includes (1) a pair of left and right plates 911L and 911R rotatably connected to both sides of the upper end of the swing arm 904; And (3) a hydraulic rod portion 914 in which a rear end portion 912a of the extension rod portion 912 is extendably attached via a nut 913. (4) Using the flange portion 912b of the extension rod portion 912 and the flange portion 911La (911Ra) of the pair of left and right plates 911L and 911R, the outer periphery of the pair of left and right plates 911L and 911R and the extension rod portion 912 is used. A pair of left and right plates 911L and 91 are inserted between the fitted spring receiving washer 915 and (5) the spring receiving washer 915. And a compression spring 916 which is arranged to surround the outer periphery of the R and the extension rod portion 912.

  With the above configuration, fine vertical movement of the rear wheel 3 can be absorbed by the compression spring 916, so that fine vibration of the traveling vehicle body 15 is suppressed, and frequent operation of the sub-cylinder 906 due to operation of the left and right tilt sensor 41 is buffered. Function.

  In addition, by operating the nut 913, the length of the extension rod portion 912 can be adjusted. For example, when it is desired to suppress the swing of the traveling vehicle body 15 depending on the field conditions, the compression spring can be tightened by tightening the nut 913. 916 can lock the buffer function. As a result, when the rear wheel 3 moves up and down frequently according to the unevenness of the field scene, the up and down movement is transmitted to the traveling vehicle body 15 as it is, the left and right inclination sensor 41 is frequently activated, and in conjunction therewith, the horizontal hydraulic pressure is The cylinder 14 operates frequently to reduce the left and right swing of the traveling vehicle body 15.

  Further, in the above-described embodiment, a configuration in which a scraper for scraping mud or the like adhered to the inner wall surface of the implanting tool 11 is not provided is described. However, the present invention is not limited to this, and for example, a scraper (not shown) is implanted. The scraper is disposed on the left side (one of the left and right sides) of the tool 11 and when the tip of the tool 11 opens forward and backward and rises, the scraper enters the inside of the tool 11 from the tip of the tool 11. It is good also as composition which rubs off the mud etc. which adhered to the inner wall surface. In the case of this configuration, the crushing wheel mounting frame (not shown) escapes further to the left side (one of the left and right sides) of the scraper so that the crushing wheel 13 does not interfere with the scraper retracted to the left side of the implant 11. It is preferable to adopt a configuration in which they are arranged at positions.

  Further, in the above embodiment, the case where the tray transport path 111 of the tray supply device 100 includes the retreat groove 111a, the flat portion 111b, and the curved surface portion 111c is described. As shown, the tray guide angle 111e extending obliquely upward from both sides of the upper end of the flat portion 111b may be further provided.

  With this configuration, more seedlings 22 can be mounted on the tray supply device 100 while having a simple and lightweight configuration.

  Further, in the above-described embodiment, a case where a seedling such as a vegetable is used as a transplant is described. However, the present invention is not limited to this, and any transplant such as a seed potato may be used.

(Embodiment 2)
In the second embodiment, a second example of the transplanter of the present invention, which includes a second tray supply device 1100 as a modification of the tray supply device 100 of the seedling transplanter 1 described in the first embodiment, is described. The structure and operation of the second seedling transplanter will be described with reference to the drawings.

  In the second seedling transplanter 101 according to the second embodiment, the same components as those of the seedling transplanter 1 according to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  In the second embodiment, a second gear mechanism 1182 for switching the rotation speed of the lead cam shaft 171 for moving the seedling table 110 in the left-right direction will be described first with reference to FIGS. The tray pressing device 920 that changes the pressing force applied to the tray 20 in order to regulate the vertical movement of the tray 20 at appropriate timing in conjunction with the operation of the tray vertical feeding device 120 will be described.

  FIG. 18 is a plan view of the second seedling transplanter 101 according to the second embodiment. FIG. 19 illustrates a power transmission path in the second gear mechanism 1182 of the Q section shown in FIG. FIG. 4 is an enlarged partial cross-sectional view for the present invention.

  FIG. 19 is a diagram showing the Q portion as viewed from the front side of the traveling vehicle body 15 and also a diagram for mainly explaining the power transmission path in an easy-to-understand manner. 3 shows a cross section of the A1-A2-A3 portion, and illustration of the slide lever 540 is omitted.

  20 is an enlarged right side view of a portion Q shown in FIG. 18, and FIG. 21 is a diagram when the slide lever 540 of FIG. 20 is viewed from the R direction, that is, when viewed from the rear side of the traveling vehicle body 15. It is a rear view.

As shown in FIG. 19, inside the seedling sending transmission case 180,
(I) a longitudinal feed drive chain belt 181 that transmits a driving force from the engine 12 to a sprocket 183 fixed to the distal end of the longitudinal feed drive shaft 151;
(Ii) a transmission gear 184 disposed adjacent to the sprocket 183 and fixed to the longitudinal feed drive shaft 151 to transmit the driving force transmitted to the sprocket 183 to the switching device 510;
(Iii) A switching device 510 for switching the lateral feed amount of the seedling table 110 by the tray transfer path moving device 170 (see FIG. 18), that is, a switching device 510 for switching the rotation speed of the lead cam shaft 171 (however, a slide moving mechanism 530 described later Excluded),
(Iv) A small-diameter gear 185a and a large-diameter gear 185b, which are disposed adjacent to and fixed to the leading end of the lead camshaft 171 and receive the driving force shifted by the switching device 510 through different paths, respectively. I have.

In addition, the switching device 510, as shown in FIGS.
(I) A driving gear 511 that receives a driving force from the engine 12 from a transmission gear 184 via a sprocket 183 is spline-connected to the shaft, and the shaft itself can slide in the axial direction of the shaft. An arranged switching transmission shaft 520;
(Ii) a first switching gear 512a and a second switching gear 512b having different transmission ratios, which are rotatably and loosely fitted to the switching transmission shaft 520;
(Iii) A slide moving mechanism 530 (see FIG. 20) arranged outside the seedling feed transmission case 180 for sliding the switching transmission shaft 520 in the axial direction.

  On the outer peripheral surface of the switching transmission shaft 520, a substantially elliptical protrusion (key portion) 521 that is long in the axial direction is formed. On the other hand, the first switching gear 512a and the second switching gear 512b, into which the switching transmission shaft 520 is rotatably inserted, are respectively provided on the inner wall surfaces of the through-holes at the central portions thereof with concave portions fitted to the projections 521. (Not shown) are formed.

  As shown in FIG. 19, a groove 522 having a predetermined width is formed inside the edge 523 on the entire outer periphery of the switching transmission shaft 520.

On the other hand, as shown in FIGS. 20 and 21, the slide moving mechanism
(I) a slide lever 540 manually moved by an operator to reciprocate the switching transmission shaft 520 in the axial direction of the shaft;
(Ii) a support shaft 542 erected vertically from the pivot 541 of the slide lever 540 and fixed to the slide lever 540;
(Iii) A first support plate 542a disposed on the slide lever 540 side for rotatably supporting the support shaft 542, and a switching transmission shaft 520 side for rotatably supporting the support shaft 542. A second support plate 542b,
(Iv) a cylindrical slide pin 543 fixed on the outer peripheral surface of the tip of the support shaft 542 and further projecting from the tip in parallel with the support shaft 542;
(V) a spring fixing pin 544 erected perpendicularly to the slide lever 540 at a position closer to the center of the body than the rotation fulcrum 541 of the slide lever 540 and closer to the grip 540a of the slide lever 540 than the rotation fulcrum 541;
(Vi) It is constituted by a tension spring 545 attached between the spring fixing pin 544 and the machine body side.

  The switching device 510 of the present embodiment is an example of the feed amount switching device of the present invention, and the drive gear 511 of the present embodiment is an example of the drive gear of the present invention. Also, the switching transmission shaft 520 of the present embodiment is an example of the switching transmission shaft of the present invention, and the first switching gear 512a and the second switching gear 512b of the present embodiment correspond to two sets of switching of the present invention. An example of a gear. The slide lever 540 of the present embodiment is an example of the slide lever of the present invention, and the extension spring 545 of the present embodiment is an example of a spring member of the present invention.

  When the grip portion 540a of the slide lever 540 is arranged upward as shown in FIG. 21, the slide pin 543 is at the diagonally upper left position in FIG. 21 (shown by a broken line in FIG. 21), and the switching transmission is performed. In a state in which the inner inner wall 522b of the groove 522 of the shaft 520 is pushed inwardly (see the movement range W of the inner inner wall 522b of the groove 522 in FIG. 21), the switching transmission shaft 520 has the arrow shown in FIGS. This shows a state in which it has been slid to the limit in the direction of N. In this state, the projection 521 (see FIG. 19) of the switching transmission shaft 520 fits into the recess of the second switching gear 512b.

  On the other hand, when the grip portion 540a of the slide lever 540 is rotated by 180 ° in the direction of the arrow S shown in FIG. 21, the slide pin 543 is positioned diagonally lower right in FIG. (Refer to the moving range V of the slide pin 543 in FIG. 21), the slide pin 543 has pushed the outer inner wall 522a of the groove 522 of the switching transmission shaft 520 to the outermost position. The switching transmission shaft 520 is slid to the limit in the direction of arrow M shown in FIG. In this state, the projection 521 of the switching transmission shaft 520 fits into the recess of the first switching gear 512a.

  As described above, when the grip portion 540a of the slide lever 540 is positioned directly above, the lead cam shaft 171 rotates at a low speed via the second switching gear 512b, and the grip portion 540a of the slide lever 540 is positioned directly below. , The lead cam shaft 171 rotates at high speed via the first switching gear 512a. In addition, in the operation transmission path from the slide lever 540 to the switching transmission shaft 520, a flexible mechanism configured by the width of the groove 522 larger than the outer diameter of the slide pin 543 is configured. The slide pin 543 pushes the outer inner wall 522a or the inner inner wall 522b to slide the switching transmission shaft 520, and the operation stroke (rotation operation angle) of the slide lever 540 is desired regardless of the slide amount of the slide lever 540. 180 degrees.

  Therefore, after the speed is switched, the slide lever 540 does not protrude sideways, so that it is not in the way.

  In addition, the above-mentioned accommodation mechanism may be constituted by an arc-shaped long hole connecting the operation from the slide lever 540 to the slide pin 543, in addition to the above-mentioned structure having the width of the groove 522. The elongated hole may be formed in the slide lever 540 in an arc shape centering on the support shaft 542, and the slide pin 543 may be inserted. In this configuration, the slide lever 540 rotates around the rotation fulcrum 541, but is not fixed to the support shaft 542. Also, the tip of the slide pin 543 is slidably inserted into the groove 522 of the switching transmission shaft 520 (in this configuration, the width of the groove of the groove 522 is such that the tip of the slide pin 543 is slidable. ), The root of the slide pin 543 is inserted into the elongated hole formed in the slide lever 540 as described above. Further, the slide pin 543 is fixed on the outer peripheral surface of the support shaft 542. Note that the first support plate 542a and the second support plate 542b (see FIG. 20) are appropriately provided with slits so as not to interfere with the rotation of the slide pin 543.

  With this configuration, when the slide lever 540 is rotated, the elongated holes are simultaneously rotated, and during the rotation operation of the slide lever 540, the root of the slide pin 543 is attached to the inner wall on one side or the inner wall on the other side of the elongated hole. At the same time as being pushed and rotating with the support shaft 542, the tip of the slide pin 543 pushes the outer inner wall 522a or the inner inner wall 522b to slide the switching transmission shaft 520.

  Further, on the surface of the slide lever 540, two types of feed speed display by the lead camshaft 171 are displayed, and the vertical direction is displayed in opposite directions. When the slide lever 540 is arranged upward, the numeral “200” is in a direction in which the number can be read, and the nursery pot 21 is arranged in a horizontal direction on a seedling tray (20 rows × 10 rows) provided with 200 holes vertically and horizontally. This means that the seedling table 110 has been set to the horizontal feed amount that matches the pitch of the seedling raising pot 21.

  Further, when the slide lever 540 is arranged downward, the numeral “128” is in a reading direction, and the seedling pot 21 is arranged horizontally on a seedling tray (16 rows × 8 rows) having 128 holes vertically and horizontally. It means that the seedling table 110 has been set to the horizontal feed amount according to the pitch of the seedling raising pot 21 in the direction.

  Thereby, the set amount of lateral feed can be intuitively understood from the direction in which the numbers are displayed, and it is easy to understand.

  Here, the tension spring 545 attached between the spring fixing pin 544 and the machine body side will be further described.

  For example, when the protrusion 521 is fitted with the concave portion of the first switching gear 512a or the second switching gear 512b, the projection 521 cannot be fitted until the mutual positions in the rotation direction are matched. Therefore, assuming that the tension spring 545 is not provided, the operator must hold down the slide lever 540 until both positions match. In addition, if it is forcibly pressed, the slide lever 540 and the like may be damaged.

  Therefore, by providing the above-described tension spring 545, when the slide lever 540 is set at the upper or lower position, the protrusion 521 and the concave portion of the first switching gear 512a or the second switching gear 512b fit. Since the tension force of the tension spring 545 acts on the fixing pin 544 so that the state of waiting temporarily is maintained until the two are aligned, when both positions match, the projection force is generated by the tension force. The fitting of the recess 521 and the recess is performed safely and reliably. The extension spring 545 is configured to extend beyond the dead center substantially at the center between the position above and below the slide lever 540 (the posture in which the slide lever 540 is oriented substantially in the horizontal direction).

  With the above configuration, the driving gear 511 that has received power from the transmission gear 184 via the sprocket 183 is spline-connected to the switching transmission shaft 520, and thus rotates the switching transmission shaft 520.

  Thereafter, when the operator sets the slide lever 540 upward, the switching transmission shaft 520 is shifted inward (see the arrow N in FIG. 19) by the slide moving mechanism 530. As a result, the projection 521 formed on the outer peripheral surface of the switching transmission shaft 520 shifts to the second switching gear 512b side, so that the projection 521 shifted in the same direction becomes the concave portion of the second switching gear 512b. The rotation of the switching transmission shaft 520 is transmitted to the large-diameter gear 185b via the second switching gear 512b, and the lead cam shaft 171 rotates at a low speed.

  On the other hand, when the operator sets the slide lever 540 downward, the switching transmission shaft 520 is shifted outward (see the arrow M in FIG. 19) by the slide moving mechanism 530. As a result, the projection 521 formed on the outer peripheral surface of the switching transmission shaft 520 shifts to the first switching gear 512a side, so that the projection 521 shifted in the same direction becomes the concave portion of the first switching gear 512a. The rotation of the switching transmission shaft 520 is transmitted to the small diameter gear 185a via the first switching gear 512a, and the lead cam shaft 171 rotates at high speed.

  Next, the tray pressing device 920 will be described with reference to FIG.

  FIG. 22 is a schematic side view for explaining the tray pressing device 920 according to the second embodiment.

As shown in FIG. 22, the tray holding device 920 includes:
(I) a lateral displacement prevention guide plate 921 provided on both sides of the tray transport path 111 to prevent lateral displacement of the tray 20;
(Ii) a stopper shaft 922 erected and fixed on the side surface of the lateral displacement prevention guide plate 921;
(Iii) One end is rotatably attached to the stopper shaft 922, the other end extends obliquely downward along the lateral displacement prevention guide plate 921, and the tip 923a of the other end is A first holding plate 923 which is bent in a substantially L shape so as to cross over the upper edge 921a of the lateral displacement prevention guide plate 921 (bent in FIG. 22 from the near side to the far side);
(Iv) One end is rotatably attached to the stopper shaft 922, and the other end extends obliquely above the columnar pin 132 attached to the upper end of the feed rod arm 130, and A second holding plate 924 in which a lower end edge 924a near the center of the one end and the other end is in contact with the outer peripheral surface of the columnar pin 132;
(V) A spiral spring member wound around the stopper shaft 922, and one end 925a applies a force in a direction for rotating the first holding plate 923 counterclockwise in a side view of FIG. The other end 925b rotates the second pressing plate 924 clockwise in the side view of FIG. 22, that is, the force in the direction in which the lower edge 924a contacts the columnar pin 132. And a tray holding spring 925 that provides the following.

  Note that the pin 132 has both a function of a fulcrum for attaching one end of the feed rod arm extension spring 161 and a function of a cam for operating the second holding plate 924. When the tray 20 is set on the path 111, the outer peripheral edge 20a of the tray 20 that protrudes outward in the form of a flange is formed with the upper end edge 921a of the lateral displacement prevention guide plate 921 and the tip bent in a substantially L shape. The configuration is such that it is disposed between the lower end edge portion 923b of the portion 923a.

  Note that the tray pressing device 920 of the present embodiment is an example of the tray pressing device of the present invention, and the second tray supplying device 1100 of the present embodiment is an example of the tray supplying device of the present invention.

  Next, the operation of the tray pressing device 920 having the above configuration will be described with reference to FIG.

  Here, after the protruding portion 121ab (see FIG. 7B) of the tray feed rod 121 escapes from the notch 112a, (1) the central portion 121a of the tray feed rod 121 points to the arrow 121a1 (see FIG. 22). And a scene moving in the direction of (2) arrow 121a3 (see FIG. 22).

(1) Scene moving in the direction of arrow 121a1 (see FIG. 22):
When the feed rod arm 130 starts to rotate counterclockwise about the tip shaft 142, the central portion 121a of the tray feed rod 121 moves in the direction of arrow 121a1 (see FIG. 22).

  As a result, the central portion 121a of the tray feed rod 121 comes out of the gap 21a of the tray 20, so that the tray 20 tends to move downward by its own weight.

  On the other hand, the feed rod arm 130 starts to rotate counterclockwise around the tip shaft 142, and at the same time, the pin 132 attached to the upper end of the feed rod arm 130 rotates counterclockwise around the tip shaft 142. By rotating around, the second pressing plate 924 that is in contact with the outer peripheral surface of the pin 132 by the restoring force of the tray pressing spring 925 is rotated counterclockwise about the stopper shaft 922.

  When the second holding plate 924 rotates counterclockwise, the other end 925b of the spiral tray holding spring 925 moves in the direction of further winding the spiral part, and thus one end 925a. Acts on the lower end edge 923b of the front end 923a of the first pressing plate 923 in a direction to increase the pressing force on the outer peripheral edge 20a of the tray 20.

  This prevents the tray 20 from moving downward by its own weight and moving.

(2) Scene moving in the direction of arrow 121a3 (see FIG. 22):
The feed roller arm 130 is instantaneously rotated clockwise around the tip shaft 142 by the restoring force of the feed rod arm extension spring 161 at the same time that the restraining roller 152 comes into non-contact with the curved edge 131a of the feed rod arm 130. As a result, the central portion 121a of the tray feed rod 121 moves from the gap 21a toward the gap 21b located one row above the seedling raising pot 21 as shown by an arrow 121a3 (see FIG. 22).

  As a result, the central portion 121a of the tray feed rod 121 is securely inserted into the gap 21b of the tray 20, and the tray 20 shifts to a downward feed operation.

  On the other hand, the feed rod arm 130 instantaneously rotates clockwise around the tip shaft 142 by the restoring force of the feed rod arm extension spring 161, and at the same time, the pin 132 attached to the upper end of the feed rod arm 130 By rotating clockwise about the shaft portion 142, the second pressing plate 924 abutting on the outer peripheral surface of the pin 132 by the restoring force of the tray pressing spring 925 rotates clockwise about the stopper shaft 922. To rotate.

  When the second holding plate 924 rotates clockwise, the other end 925b of the spiral tray holding spring 925 moves in a direction to release the spiral portion. It acts on the lower edge 923b of the tip 923a of the first holding plate 923 in a direction to reduce the pressing force on the outer peripheral edge 20a of the tray 20.

  Thus, when the tray feed rod 121 moves in the direction of the arrow 121a4 (see FIG. 22), the tray 20 can be smoothly fed downward.

  According to the configuration described above, it is possible to prevent the tray 20 from shifting downward due to the weight.

  Further, in order to press the outer peripheral edge portion 20a of the tray 20 with the first holding plate 923, the above-described seedling raising pot 21 is provided with 200 holes vertically and horizontally (20 rows × 10 rows) or 128 holes. A seedling tray (16 rows × 8 rows) can be held down regardless of the size of the tray 20.

  In addition, since the outer peripheral edge 20a of the tray 20 is pressed by the lower edge 923b of the front end 923a of the first holding plate 923, the tray 20 does not slip easily with a simple structure.

(Embodiment 3)
In the third embodiment, another configuration example of the second gear mechanism 1182 (see FIG. 19) provided in the second tray supply device 1100 of the second seedling transplanter 101 described in the second embodiment. The structure and operation of the third gear mechanism 2182 will be described with reference to the drawings.

  In the third gear mechanism 2182 of the third embodiment, the same components as those of the second gear mechanism 1182 of the second embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  FIG. 23 is an enlarged partial cross-sectional view for explaining a power transmission path in third gear mechanism 2182 of the third embodiment.

  Note that FIG. 23 is a diagram mainly for easily explaining the power transmission path, and thus the seedling feed transmission case 180 and the slide lever 540 are not shown in the figure. FIG. 23 is a view corresponding to a cross section taken along the line A1-A2-A3 shown in FIG. 20, similarly to FIG.

  As shown in FIG. 23, the main difference between the third gear mechanism 2182 of the third embodiment and the second gear mechanism 182 of the second embodiment is that the second gear mechanism 182 has a switching transmission. In contrast to the configuration in which the protrusion 521 of the shaft 520 fits into the recess of the first switching gear 512a or fits into the recess of the second switching gear 512b (see FIG. 19), this embodiment In the third gear mechanism 1182 according to the third embodiment, a cylindrical groove 1521 formed perpendicular to the axis of another switching transmission shaft 1520 in the sliding direction (corresponding to the directions of arrows M and N in FIG. 23). The ball member 1523 constantly pressed outward by the compression spring 1522 fits into the recess 1512a of the first switching gear 512a or the recess 151 of the second switching gear 512b. A point is configured to b mating.

  Hereinafter, the difference will be mainly described with reference to FIG.

  As shown in FIG. 23, the driving gear 511 that receives the driving force transmitted from the transmission gear 184 is spline-connected to another switching transmission shaft 1520, and another switching is performed based on the first switching gear 512a. The transmission shaft 1520 is arranged on the side of the edge 523. A second switching gear 512b is disposed adjacent to the first switching gear 512a on the side opposite to the edge 523 of another switching transmission shaft 1520 with a collar member 1524 interposed therebetween. . The collar member 1524 is a ring-shaped member inserted into another switching transmission shaft 1520, and tapered portions 1524a and 1524b that make point contact with the surface of the ball member 1523 are provided at both ends on the inner peripheral side of the ring shape. Is formed.

  The diameter of the ball member 1523 is larger than the width of the first switching gear 512a and the width of the second switching gear 512b.

  Further, when the ball member 1523 is fitted with the concave portion 1512a of the first switching gear 512a and when the ball member 1523 is fitted with the concave portion 1512b of the second switching gear 512b, The center position of 1523 is located inside the surface of another switching transmission shaft 1520.

  Next, the operation of the ball member 1523 will be described with reference to FIG.

(1) When the slide lever 540 is operated in the direction opposite to the arrow S (see FIG. 21) and another switching transmission shaft 1520 starts sliding in the N direction (see FIG. 23):
The initial state in this case is a state where more than half of the ball member 1523 is inserted into the groove 1521 and the remaining part is pushed into the concave portion 1512a of the first switching gear 512a (FIG. 23). , A ball member 1523 shown by a solid line). That is, the first switching gear 512a is engaged with another switching transmission shaft 1520.

  In the above state, when another switching transmission shaft 1520 starts sliding in the N direction, the ball member 1523 also slides with the sliding movement of the groove 1521, and the ball member 1523 is tapered by the tapered portion 1524a of the collar member 1524a. And is pushed in the depth direction of the groove 1521 while opposing the repulsive force of the compression spring 1522.

  As a result, the ball member 1523 completely comes out of the concave portion 1512a of the first switching gear 512a, so that the engagement between the first switching gear 512a and another switching transmission shaft 1520 is released.

(2) When the operation of the slide lever 540 (see FIG. 20) in the direction opposite to the arrow S is further continued and another switching transmission shaft 1520 is further slid in the N direction:
As another switching transmission shaft 1520 continues to slide in the N direction, the groove 1521 further slides and the ball member 1523 also slides. Then, when the ball member 1523 moves to the position of the second switching gear 512b, the ball member 1523 is pushed out into the gap of the concave portion 1512b of the second switching gear 512b by the repulsive force of the compression spring 1522 (FIG. 23). , A ball member 1523 indicated by a two-dot chain line). That is, the second switching gear 512b is engaged with another switching transmission shaft 1520 via the ball member 1523.

  Thereby, the transmission of the rotational driving force to the lead camshaft 171 is switched from the first switching gear 512a to the second switching gear 512b.

(3) When the slide lever 540 is operated in the direction of the arrow S (see FIG. 21) and another switching transmission shaft 1520 starts sliding in the M direction (see FIG. 23):
The initial state in this case is a state in which the second switching gear 512b is engaged with another switching transmission shaft 1520 via the ball member 1523 (see the ball member 1523 shown by a two-dot chain line in FIG. 23).

  In the above state, when another switching transmission shaft 1520 starts sliding in the M direction, the ball member 1523 also slides simultaneously with the sliding movement of the groove 1521, and the ball member 1523 is tapered by the tapered portion 1524b of the collar member 1524b. And is pushed in the depth direction of the groove 1521 while opposing the repulsive force of the compression spring 1522.

  As a result, the ball member 1523 completely comes out of the concave portion 1512b of the second switching gear 512b, so that the meshing between the second switching gear 512b and another switching transmission shaft 1520 is released.

(4) When the operation of the slide lever 540 (see FIG. 20) in the direction of arrow S is further continued and another switching transmission shaft 1520 is further slid in the direction of M:
As another switching transmission shaft 1520 continues to slide in the M direction, the groove 1521 further slides and the ball member 1523 also slides. Then, when the ball member 1523 moves to the position of the first switching gear 512a, the ball member 1523 is pushed out into the gap of the concave portion 1512a of the first switching gear 512a by the repulsive force of the compression spring 1522 (FIG. 23). , A ball member 1523 shown by a solid line). That is, the first switching gear 512a is engaged with another switching transmission shaft 1520 via the ball member 1523.

  Thereby, the transmission of the rotational driving force to the lead camshaft 171 is switched from the second switching gear 512b to the first switching gear 512a.

  In the third embodiment, the collar member 1524 is disposed between the first switching gear 512a and the second switching gear 512b, and the tapered portions 1524a and 1524b formed at both ends on the inner peripheral side thereof are ball members. With the configuration in which the switching transmission shaft 1520 comes into contact with the switching transmission shaft 1523, rattling in the sliding direction (N direction or M direction) of another switching transmission shaft 1520 can be prevented. Further, the outer diameter of the ball member 1523 is made larger than the width of the first switching gear 512a and the second switching gear 512b, and the ball member 1523 is formed by the concave portion 1512a of the first switching gear 512a and the second switching gear 512b. The configuration is such that the volume of the portion that enters the concave portion 1512b is increased, and transmission from another switching transmission shaft 1520 to the first switching gear 512a or the second switching gear 512b is reliably performed.

  Further, in the third embodiment, the ball member 1523 is configured to be pressed toward the concave portions 1512a and 1512b by the compression spring 1522, so that, for example, an overload is applied to the lead cam shaft 171 and the first switching gear 512a Alternatively, even when the second switching gear 512b is temporarily locked, another switching transmission shaft 1520 tries to continue rotating, so that the groove 1521 is positioned in the rotating direction with respect to the concave portion 1512a or 1512b. As a result, the ball member 1523 is pushed in the depth direction of the groove 1521. Since only a part not including the center of the ball member 1523 is fitted into the concave portion 1512a or 1512b, the oblique spherical surface of the ball member 1523 has the first switching gear 512a or the second switching gear near the concave portion 1512a or 1512b. The switching member 512b is pushed in contact with the shoulder of the inner diameter portion (that is, the boundary between the inner diameter portion and the concave portion) of the switching gear 512b, so that the ball member 1523 is pushed in the depth direction of the groove 1521.

  Thus, the first switching gear 512a or the second switching gear 512b is disengaged from another switching transmission shaft 1520, and the ball member 1523 acts as a safety clutch. In other words, another switching transmission shaft 1520 idles, so that damage to the third gear mechanism can be prevented.

  In the above embodiment, the range between the planted plants corresponding to “planting 1 (low speed)” and the range between the planted plants corresponding to “planting 2 (high speed)” partially overlap. However, the present invention is not limited to this. For example, a configuration in which the ranges between the planted strains do not overlap may be used.

  In the above-described embodiment, the range between two types of planting strains corresponding to two types of running speeds, “planting 1 (low speed)” and “planting 2 (high speed)”, is stored in the memory unit 810 in advance. However, the present invention is not limited to this. For example, a range between three or more planted strains corresponding to three or more traveling speeds may be stored in the memory unit 810 in advance.

  Further, in the above-described embodiment, a configuration in which the upper limit and the lower limit, which are the range between the planted strains that can be set, are simultaneously displayed on the display unit 630 has been described. However, the present invention is not limited to this. It may be configured to be selectively displayed.

  Further, in the above-described embodiment, the settable range between the planted strains is displayed on the display section 630 in the left half display area, and the actually set value between the planted strains is displayed on the right half display area. Has been described. However, the present invention is not limited to this. For example, one of the display of the range between the settable plants and the display of the value between the planted plants that are actually set is displayed on the entire display unit 630. May be selectively displayed in the display area of the above.

  Further, in the above-described embodiment, the settable range between the planted strains is displayed on the display section 630 in the left half display area, and the actually set value between the planted strains is displayed on the right half display area. However, the present invention is not limited to this. For example, a display of a settable range between planted plants, a value between planted plants that is actually set, and a configuration of displaying a total number of planted plants are also provided. It may be. Thereby, the number of plants to be planted can be managed. In addition, it is good also as a structure provided with the function which resets the displayed planting number, for example, can measure the planting number of seedlings for each field.

  In the above-described embodiment, the configuration in which the pressing force of the tray pressing spring 925 cannot be adjusted by the operator has been described. However, the present invention is not limited to this. For example, the fixing position of the other end 925b of the tray pressing spring 925 may be a plurality of positions. May be configured so that an operator can adjust the pressing force according to the weight of the tray 20.

  In the above-described embodiment, the configuration has been described in which the distal end portion 923a of the first pressing plate 923 presses the outer peripheral edge portion 20a of the tray 20 with a constant pressing force even when the tray 20 is vertically fed. However, the present invention is not limited to this. For example, when the tray 20 is fed vertically, the pressing force may be set to zero.

  Further, in the above-described embodiment, the case where the first holding plate 923 is a plate-like member has been described. However, the present invention is not limited to this. For example, the first holding plate 923 may be a rod-like member having a circular cross section. Thereby, the tray 20 is hardly damaged.

  When the first holding plate 923 is a rod-shaped member having a circular cross section, the surface of the upper edge 921a of the lateral displacement prevention guide plate 921 corresponding to the leading end 923a bent substantially in an L-shape is viewed from the side. Thus, a configuration in which a substantially semicircular recess is formed may be employed. With this configuration, when the outer peripheral edge portion 20a of the tray 20 is pressed by the distal end portion of the first pressing plate having a circular cross-sectional shape, the outer peripheral edge portion 20a is curved along the shape of the recess, so that the tray 20 is firmly held. And the displacement of the tray 20 can be reliably prevented.

  Further, in the case of a configuration in which a substantially semicircular recess is formed on the surface of the upper edge 921a of the lateral displacement prevention guide plate 921, the height of the tip is higher than the height of the edge of the recess in the center of the recess when viewed from the side. A configuration in which projections with a small height are formed may be used. With this configuration, only when the outer peripheral edge portion 20a of the tray 20 is pressed by the first pressing plate, the outer peripheral edge portion 20a is caught by the projection, and the tray 20 can be firmly fixed.

  Further, in the first embodiment, a case where a known fixed position stop clutch is used as the planting clutch 420 has been described. However, the present invention is not limited to this. May be. Hereinafter, the second planting clutch 1420 will be described. Here, the same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  Here, FIG. 24 is a schematic side view for explaining the second planting clutch 1420.

  As shown in FIG. 24, the second planting clutch 1420 has a configuration in which a rotational driving force is transmitted from the outer input shaft 1421 to the inner output shaft 1423 via three rollers 1422. The output shaft 1423 in FIG. 24 corresponds to the transmission shaft 421 of the planting clutch 420 of the first embodiment.

  As shown in FIG. 24, both the inner peripheral shape and the outer peripheral shape of the cross section of the input shaft 1421 are circular. On the other hand, the outer peripheral shape of the output shaft 1423 is, as shown in FIG. 24, three straight sides 1423a arranged corresponding to the positions of the three rollers 1422, and these straight parts 1423a are connected to each other by an arc part 1423b. Shape. A gap 1424 existing between the linear portion 1423a and the inner peripheral surface 1421a of the input shaft 1421 is such that both ends of the linear portion 1423a are narrower than the vicinity of the central portion in a side view, and both ends are rollers. The diameter of the roller 1422 is smaller than the diameter of the roller 1422 and is larger than the diameter of the roller 1422 near the center.

  A roller 1422 having a circular cross section, which is movably disposed in the gap 1424, is urged by a spring (not shown) and is driven by a ring-shaped trip cam cage 1425 having a circular cross section in the direction of arrow A (that is, in the direction of arrow A) , Which is the same direction as the rotation directions of the input shaft 1421 and the output shaft 1423).

  The three rollers 1422 urged in the direction of arrow A are pressed against one end 1423a1 of both ends of the linear portion 1423a, so that the three rollers 1422 simultaneously contact the input shaft 1421 and the output shaft 1423. As a result, the rotational driving force of the input shaft 1421 is transmitted to the output shaft 1423.

  Therefore, in this transmission state, the input shaft 1421, the output shaft 1423 and the trip cam cage 1425 rotate integrally.

  When the rotation of the trip cam cage 1425 in the direction A is regulated by the one end 460a of the first arm 460 described with reference to FIG. And the roller 1422 is located in a wide portion of the gap 1424 between the input shaft 1421 and the output shaft 1423, and the roller 1422 is moved from the inner peripheral surface 1421a of the input shaft 1421 or the linear portion 1423a of the output shaft 1423. Away and become non-powered.

  In this non-transmission state, if the three rollers 1422 move too much in the direction opposite to the direction of arrow A due to the effect of inertia or the like, the output shaft 1423 is turned in a slightly opposite direction, and the output shaft 1423 stops. May become unstable. However, in the configuration example shown in FIG. 24, by providing the stopper plate 1426 that rotates integrally with the output shaft 1423, the three rollers 1422 that move in the direction opposite to the arrow A direction are received and move in the opposite direction. This is a configuration that prevents the output shaft 1423 from becoming unstable because it is prevented from being too long.

  In the above-described embodiment, the configuration in which the engine 12, the transmission case 4, and the like are covered with the bonnet 109 has been described. On the other hand, FIGS. 25A and 25B show an example in which a heat exhaust port 109 a is provided at the rear of the hood 109. FIG. 25A is a perspective view of the bonnet 109, and FIG. 25B is a perspective view of the bonnet 109 of FIG. The outside air entering from the air inlet 109b provided on the front surface of the bonnet 109 cools the engine 12 and the transmission case 4 by the exhaust heat port 109a shown in FIG. Is done.

  Further, in the first embodiment, as shown in FIG. 15, a configuration in which a hydraulic pump (hydraulic gear pump) 850 is disposed between an engine pulley 860 and a transmission pulley 865, that is, an engine output shaft and a transmission input shaft in a side view. The case where the hydraulic pump 850 is disposed between the hydraulic pump 850 and the hydraulic gear pump 850 is described, but the present invention is not limited to this. For example, in a side view, a hydraulic gear pump and an alternator (a generator for charging) are provided in front of the engine pulley 860 (that is, the engine output shaft). (Not shown) may be arranged. This facilitates maintenance of the hydraulic gear pump and the alternator (charging generator) from the front of the machine. In addition, in the case of this configuration, the tension applied to the engine output shaft by the transmission belt hung between the hydraulic gear pump and the alternator disposed in front of the engine pulley 860 (that is, the engine output shaft) and the engine pulley 860 is: The first transmission belt 855 hung between the engine pulley 860 and the transmission pulley 865 is arranged to act in a direction opposite to the tension applied to the engine output shaft. As a result, both tensions of the transmission belt and the engine output shaft are offset, so that no load is applied to the engine output shaft by the transmission belt.

  In the third embodiment, when the ball member 1523 is fitted with the concave portion 1512a of the first switching gear 512a and when the ball member 1523 is fitted with the concave portion 1512b of the second switching gear 512b, In any case, the configuration has been described in which the center position of the ball member 1523 is located inside the surface of another switching transmission shaft 1520. However, the present invention is not limited to this. For example, the center position of the ball member 1523 may be different from the switching transmission shaft 1520. A configuration that is located outside the surface of the shaft 1520 may be used.

  With this configuration, more than half (or most) of the volume of the ball member 1523 is pushed into the gap between the recesses 1512a or 1512b. For example, even when a large load is applied to the lead cam shaft 171, the ball member 1523 is Since the groove 1521 does not come off from the recess 1512a or 1512b, the groove 1521 is not displaced in the rotation direction with respect to the concave portion 1512a or 1512b, and the first switching gear 512a or the second switching gear 512b is connected to another switching transmission. It rotates in synchronization with the rotation of the shaft 1520.

  On the other hand, even in the case of this configuration, the center of the ball member 1523 is not positioned on the opposite side of the groove 1521 from the tapered portions 1524a and 1524b, and another switching transmission shaft 1520 slides in the N direction and the M direction. At the time of shifting, the ball member 1523 is pushed in the depth direction of the groove 1521 by the tapered portions 1524a and 1524b of the collar member 1524, so that the switching to the first switching gear 512a or the second switching gear 512b can be smoothly performed. In this case, the ball member 1523 does not function as a safety clutch.

  In addition, the depth of the concave portion 1512a and the depth of the concave portion 1512b are made different (the depth of the concave portion 1512a is made larger than the depth of the concave portion 1512b), and the volume in which the ball member 1523 enters is different between the concave portion 1512a and the concave portion 1512b. According to the respective transmission ratios of the first switching gear 512a and the second switching gear 512b, it is possible to function as the safety clutch with an appropriate disconnection load.

  The center of the ball member 1523 fits into one of the recesses 1512a and 1512b, while the center of the ball member 1523 fits into one of the recesses 1512a and 1512b. It is good also as a structure which does not fit. As a result, the ball member 1523 does not function as a safety clutch for the switching gear corresponding to one concave portion, but the ball member 1523 functions as a safety clutch for the switching gear corresponding to the other concave portion.

  In the second embodiment, as an example of the transplanter of the present invention, a second tray supply device 1100 including a second tray supply device 1100 instead of the tray supply device 100 of the seedling transplanter 1 described in the first embodiment is used. However, the present invention is not limited to this. For example, a conventional seedling transplanter in which a seedling removal device sequentially removes seedlings from a seedling raising pot on a tray and plants the seedlings in a field with a planting tool (that is, in the first embodiment). Instead of the described tray feeding device of a conventional seedling transplanter which does not have the feature that it is possible to set an appropriate planting stock within the range between the planting stocks corresponding to the specified running speed. It may be a seedling transplanter provided with the second tray supply device 1100 (see FIG. 18). Also in the case of this configuration, similarly to the above, the effect relating to the above-described speed change of the lead cam shaft 171 and the effect relating to the prevention of the vertical displacement of the tray 20 by the tray pressing device 920 are exhibited.

  Further, in the above-described embodiment, the configuration in which both the feed amount switching device 510 and the tray holding device 920 are simultaneously provided as the second tray supply device 1100 has been described. It may be a seedling transplanter configured to have one of the functions of the 510 and the tray holding device 920.

  INDUSTRIAL APPLICABILITY The transplanter according to the present invention has an effect that an appropriate strain can be set within a set range between strains corresponding to the running speed, and is useful as a seedling transplanter or the like.

11 Planting tool 15 Running body 20 Tray
21 seedling pot
21b gap 22 seedling (transplant)
81 Lifting operation lever (lifting operation tool)
112 rod guide plate
112a notch 120 vertical feeder
121 Tray feed rod 170 Lateral feed device 190 Shift lever (traveling transmission)
200 Take-out device 420 Planting clutch 470 Solenoid (drive device)
500 Aircraft control mechanism (elevation mechanism)
510 Switching device 511 Drive gear 512a First switching gear (switching gear)
512b Second switching gear (switching gear)
520 Switching transmission shaft 540 Slide lever 630 Display unit 710 Sensor plate (height detection unit)
770 Planting switch (height detector)
800 control unit 810 memory unit (storage unit)
920 tray holding device

Claims (4)

The vehicle body (15), a tray supply equipment for supplying a tray (20) containing a graft (22), the tray (20) planted planting tool in the field by the implants removed from the (11) In a transplanter with a dispensing device (200) for feeding,
The tray supply equipment, the transverse feed device for feeding a tray (20) in the transverse direction (170), feed amount changeover device for switching the feeding amount of the tray by the lateral feed device (170) (20) (510) Composed of
The feed amount switching device (510) includes a drive gear (511) for transmitting a driving force, a switching transmission shaft (520) arranged to be movable in the axial direction, and a rotatable rotation of the switching transmission shaft (520). A switching gear (512a, 512b) having a different transmission ratio inserted into the shaft, and a slide lever (540) that can be rotated to move the switching transmission shaft (520) in the axial direction.
When the slide lever (540) is operated from one downward position to another upward position, the switching transmission shaft (520) moves to move the drive gear (511) and the switching gear (512a, 512b) is connected to one of the switching gears (512a),
When the slide lever (540) is operated from one position upward to one position downward, the switching transmission shaft (520) moves to move the drive gear (511) and the switching gear (512a, 512b) and the other switching gear (512b).
An elevating mechanism (500) for elevating and lowering the traveling body (15), an elevating operation tool (81) for operating the elevating mechanism (500), and the traveling body (15) has reached a predetermined height for planting. A height detector (710, 770) for detecting whether or not
The lifting / lowering operating tool (81) is set at a position for lowering the traveling vehicle body (15), and the height detectors (710, 770) determine that the traveling vehicle body (15) has reached a predetermined height. Provided is a control unit (800) for operating the driving device (470) to turn on and off the planting clutch (420), provided that the detection is performed .
The tray supply device includes a back surface of the tray (20) in a gap (21b) between the seedling pots (21) vertically adjacent to a plurality of seedling pots (21) formed on the back surface side of the tray (20). The tray (20) is moved by one row in the lateral direction of the seedling raising pot (21) by moving in from the side and moving to a predetermined position to get out of the gap (21b), and the tray (20) is moved sideways. A tray feed rod (121) that moves upward by one line in the direction is provided, and after the tray feed rod (121) performs a feed operation, the tray (20) is temporarily held by holding the tray feed rod (121). A transplanter comprising a rod guide plate (112) having a cutout (112a) for restricting movement . The control unit (800) is set at a position where the lifting / lowering operation tool (81) lowers the traveling vehicle body (15) , and the height detection unit (710, 770) controls the traveling vehicle body (15). 2. The transplanter according to claim 1, wherein when it is detected that has reached a predetermined height, the driving device (470) is actuated to transmit driving force to the planting clutch (420). 3. . The tray supply equipment, the tray longitudinal feeding device for feeding (20) in the longitudinal direction (120), in conjunction with the operation of the vertical feed device (120), to said longitudinal direction of said tray (20) The transplanter according to claim 1 or 2, further comprising a tray holding device (920) for changing a pressing force for restricting movement.   A planting clutch (420) for turning on and off the driving force to and from the planting tool (11), and a driving device (470) for turning on and off the planting clutch (420) at a predetermined operation cycle. A traveling transmission (190) for designating one traveling speed from among a plurality of traveling speeds of the traveling vehicle body (15) and a range between a plurality of planting stocks corresponding to the plurality of traveling speeds are stored in advance. A storage unit (810), a display unit (630) for displaying a range between planted strains corresponding to the traveling speed specified by the traveling transmission (190), and a planting displayed on the display unit (630). The operation cycle of the driving device (470) is determined by the control unit (800) based on a planting stock selected within a range between the stocks and a designated traveling speed. The transplant according to any one of claims 1 to 3. .

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