JP2011217685A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanter capable of preventing damage of a planting clutch and smoothly changing over the work by surely switching on/off the planting clutch when switching the traveling work.SOLUTION: This seedling transplanter includes: the planting clutch 38 for switching on/off a power to a seedling planting device 3; and a clutch pin 41 for switching on/off the planting clutch 38; wherein the planting clutch 38 includes a normal-rotation clutch-off slope 38a for receiving the clutch pin 41, and a clutch claw 38b for receivingly stopping the clutch pin 41. In this seedling transplanter, the left side in the normal rotation direction of the normal-rotation clutch-off slope 38a is provided with a reverse-rotation clutch-off slope 38c whose right side in the reverse-rotation direction is sequentially ascending. When the planting clutch 38 is not switched off even if the clutch pin 41 comes into contact with the clutch claw 38b, the clutch pin 41 is adapted to come into the reverse-rotation clutch-off slope 38 to make the planting clutch 38 off.

Description

  The present invention relates to a seedling transplanting machine that can prevent a planting clutch from being damaged and can smoothly switch between operations by reliably turning on and off the planting clutch when switching operations.

  In the seedling transplanter, the rotational power from the engine is transmitted to the seedling planting device via the planting clutch, and in parallel with the planting clutch, the transmission power of the planting clutch is improved by the weight of the seedling planting tool of the seedling planting device. It is well known that a regulation clutch is provided that restricts the rotation of the lower side of the transmission of the planting clutch before the rotation of the side (Patent Document 1).

Japanese Patent Laid-Open No. 10-313622

  When a continuously variable transmission is incorporated into the traveling vehicle body of the seedling transplanter of the background art, when the continuously variable transmission is switched from forward to reverse immediately after planting seedlings with the seedling planting device, the planting clutch reverses and seedling planting There may be a problem that the device is locked to the seed take-out part of the seed stand.

  The object of the present invention is to eliminate such problems.

In order to solve the above problems, the following technical measures were taken.
The invention of claim 1 includes a hydraulic continuously variable transmission (20) that changes the traveling speed and forward and backward travel of the traveling vehicle body, a traveling operation lever (43) that operates the hydraulic continuously variable transmission (20), The seedling planting claws (28a) for scraping seedlings from the seedling mount (29) of the seedling planting device (3) provided on the traveling vehicle body and the seedlings scraped by the seedling planting nails (28a) are pushed out to the field. A seedling planting tool (28) provided with a planting basket (28b), a planting clutch (38) for switching power transmission to the seedling planting device (3), and a planting clutch (38). A clutch pin (41) to be engaged, and the planting clutch (38) to be engaged with the clutch pin (41) at the time of forward rotation, the clutch cut inclined surface (38a) and the forward rotation clutch cut inclined surface (38a). A clutch pin (38b) for receiving the clutch pin (41) is provided at the side end. In the seedling transplanter, a reverse clutch disengagement inclined surface (38c) is provided on the upper side of the forward rotation direction of the clutch disengagement inclined surface (38a). If the planting clutch (38) is not disengaged even if the clutch pin (41) contacts the pawl (38b), the clutch pin (41) contacts the clutch disengagement inclined surface (38c) during reverse rotation. The seedling transplanting machine is characterized in that the planting clutch (38) is in a disengaged state.

  According to the invention of claim 2, when the traveling operation lever (43) is switched from forward to reverse immediately after the seedling planting tool (28) has planted seedlings in the field, the clutch pin (41) The seedling transplanting machine according to claim 1, wherein the planting clutch (38) is brought into a cutting state by contacting the cutting inclined surface (38c).

  In the invention according to claim 3, the planting clutch (38) is located on the lower side in the forward rotation direction than the clutch pawl (38b) and on the lower side in the reverse rotation direction of the reverse clutch disengagement inclined surface (38c). A clutch disengagement regulating inclined surface (38e) having an upward inclination on the lower side in the rotational direction is formed, and the continuously variable transmission (20) is switched from forward to reverse immediately after the seedlings on the seedling platform (29) are sent out. When the attached clutch (38) is disengaged, the disengaged state of the planting clutch (38) is maintained until the clutch pin (41) passes through the clutch disengagement regulating inclined surface (38e). A seedling transplanter according to claim 1 or claim 2.

  According to the first aspect of the present invention, when the planting clutch (38) is disengaged, the hydraulic continuously variable transmission (20) is switched from normal rotation to reverse rotation, and the clutch pin (41) is connected to the clutch pawl (38b). ), Even if the planting clutch (38) does not become disengaged, the planting clutch (38) comes into contact with the clutch disengagement inclined surface (38c) during reverse rotation. ) Can be prevented from reversing in the on state, so that the planting clutch (38) and the seedling planting tool (28) are prevented from being damaged, and the durability is improved.

Further, since the planting clutch (38) and the seedling planting tool (28) are not damaged, the planting operation of the seedling is not interrupted, and the work efficiency is improved.
According to the invention of claim 2, in addition to the effect of the invention of claim 1, when the seedling planting tool (28) switches the traveling operation lever (43) from forward to reverse immediately after planting the seedling in the field, The clutch pin (41) can be brought into contact with the clutch cut inclined surface (38c) during reverse rotation so that the planting clutch (38) can be reliably turned off. Locking of the seedling pusher (28b) to the planting claw (28a) is prevented, so that the planting operation is not interrupted and the work efficiency is improved.

Further, it is not necessary for the operator to release the locked state of the seedling planting tool (28), and the labor of the operator is reduced.
According to the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, the hydraulic continuously variable transmission (20) is moved from forward to backward immediately after the seedling on the seedling stand (29) is sent out. Since the disengagement state of the planting clutch (38) can be maintained until the clutch pin (41) passes through the clutch disengagement regulating inclined surface (38e), seedling planting of the seedling planting tool (28) The nail | claw (28a) stops in the state which approached the muddy water, and it is prevented that a seedling planting nail | claw (28a) is clogged with mud and a foreign material, and generation | occurrence | production of the missing stock by missing a seedling can be prevented.

Overall side view of a riding seedling planter Overall plan view of a riding seedling planter Cutting side view of seedling planting device Side view of planting clutch and clutch pin (A) Side view of the planting clutch (B) Front view (C) View of the inclined cam surface (A) Side view showing rotational position of planting clutch (B) Side view showing rotational position of planting clutch (C) Side view showing rotational state of planting clutch (D) Rotating state of planting clutch Side view (E) Side view showing rotation state of planting clutch (F) Side view showing rotation state of planting clutch (A) Perspective view of 畦 clutch lever (B) Side view of 畦 clutch lever Front view of the operation panel Overall side view of another example of a riding seedling planter Rear view of seedling stand (A) Side view of a seedling platform where the seedling platform end movement detection switch is turned off (B) Side view of the seedling platform where the seedling platform end movement detection switch is turned on (A) Rear view of seedling stage provided with seedling stage end movement detection sensor (B) Rear view showing movement of seedling stage provided with seedling stage end movement detection sensor (A) Perspective view during seedling planting operation of auxiliary seedling stage (B) Perspective view during supplementing seedling of auxiliary seedling stage (C) Side view during supplementing seedling of auxiliary seedling stage

Embodiments of the present invention will be described below with reference to the drawings. First, the whole structure of the riding seedling transplanter which implements this invention based on FIG.1 and FIG.2 is demonstrated.
A seedling planting device 3 is connected to the rear side of the traveling vehicle body 1 by a lifting link device 2 so as to be movable up and down. The traveling vehicle body 1 has a pair of left and right front wheels 4 and 4 and rear wheels 5 and 5 as drive wheels. It is a four-wheel drive vehicle body, and the whole is configured as a riding seedling transplanter. Auxiliary seedling platforms 61 and 61 are provided on the left and right sides of the front side of the traveling vehicle body 1.

  A mission case 8 is attached to the front end portions of the left and right main frames 7, 7, and an engine 12 is mounted on a middle portion in the front-rear direction of the left and right main frames 7, 7 via a rubber mount. A hydraulic continuously variable transmission 20 is integrally assembled so that the power transmitted from the engine 12 is switched forward and backward and continuously variable.

  A steering shaft (not shown) projects upward from the front side of the transmission case 8, a steering handle 9 is attached to the upper end of the steering shaft, and an operation panel 10 is provided at a lower portion of the steering handle 9. Further, a synthetic resin floor 11 is attached above the left and right main frames 7, 7, a cockpit 13 is disposed above the engine 12, and a fertilizer device 6 is disposed behind the cockpit 13. .

  In addition, left and right front axle cases (not shown) are extended from the front side of the transmission case 8 to the left and right sides, and left and right front wheel support cases 15 and 15 are attached to the left and right sides to be rotatable about the vertical axis. Left and right front wheels 4 and 4 are supported on front wheel support cases 15 and 15.

  Further, a horizontal frame 7a is connected to rear end portions of the left and right main frames 7, 7, and a case connecting frame (not shown) is supported on a rolling shaft (not shown) provided on the horizontal frame 7a so as to be freely rollable. Left and right rear wheel transmission cases 17, 17 are attached to the left and right sides. In addition, left and right vertical frames 7b and 7b are erected at the rear end portions of the left and right main frames 7 and 7, and the front end portions of the elevating link devices 2 and 2 can be vertically rotated on the left and right vertical frames 7b and 7b. I support it.

  The rotational power of the engine 12 is transmitted to the input shaft of the continuously variable transmission 20 via the belt transmission 18, and forward / backward switching and forward / backward continuously variable transmission are performed by the continuously variable transmission 20, and the mission is transmitted via the output shaft. It is transmitted to case 8. The power transmitted to the transmission case 8 is taken out from the left and right side portions of the transmission case 8 via a gear-type transmission and a differential mechanism in the case, and the left and right front wheel drive shafts in the left and right front axle case (not shown). (Not shown) and transmitted to the left and right front wheels 4 and 4 through a transmission gear group.

  Further, the rear wheel power passing through the differential mechanism in the transmission case 8 is taken out to the left and right rear wheel transmission shafts 19 and 19 via the left and right rear wheel side clutch mechanisms in the case, and the left and right rear wheel transmission cases 17 and 17 are obtained. It is transmitted to the left and right rear wheels 5 and 5 via the internal speed reduction mechanism. Further, working power is taken out from the front right side of the mission case 8 to a PTO transmission shaft (not shown) and transmitted to the seedling planting device 3 and the fertilizer application device 6 through the PTO shaft (not shown).

  The seedling planting device 3 includes a plurality of transmission cases 25, ..., a drive shaft case (not shown) that interconnects the transmission cases 25, ..., and a transmission in the drive shaft case (not shown). A horizontal axis (not shown), a plurality of seedling planting tools 28 attached to the transmission cases 25 and driven along a predetermined planting locus, and a seedling mount 29 that reciprocates in the horizontal direction. Etc.

  A seedling feeding belt 29b is provided at the bottom of the seedling table 29, and the seedling table 29 is configured so as to be reciprocally movable left and right by a horizontal reciprocating device 29c. The seedling feeding belt 29b is driven so that the seedling is sent to the lower rear side and received by the front receiving plate 29a.

  In addition, left and right floats 30L, 30R for removing wheel marks are provided below the left and right transmission cases 25, 25 so as to be adjustable up and down, and a center float 30C is provided below the center transmission case 25 as adjustable. Provided. The up and down movement of the center float 30C is detected by a float sensor (not shown), and a control valve (not shown) is operated based on the detected value to adjust the raising and lowering cylinder 31 to expand and contract the seedling planting device 3 to a predetermined level. It is configured to be adjusted up and down to the depth.

Next, the seedling planting tool 28 will be described with reference to FIG.
A planting transmission shaft 35 is provided on the rear side of the plurality of transmission cases 25,..., And power is transmitted from the PTO shaft to the planting transmission shaft 35. In the transmission case 25,..., A planting transmission case 36 is rotatably supported so as to rotate around the planting transmission shaft 35, and seedling planting tools 28,... Are attached to both ends of the planting transmission case 36, respectively. ing. A planting transmission device 37 comprising a plurality of gears is provided in the planting transmission case 36, and power is transmitted from the planting transmission shaft 35 to the planting transmission device 37. Thus, the seedling planting tools 28, 28 are in a fixed posture so that the tips of the seedling planting claws 28a, 28a draw a closed loop locus when the planting transmission case 36 rotates in a predetermined rotational direction at a predetermined speed ratio. Then, the seedling is sandwiched and taken out from the seedling outlet of the front plate 28a of the seedling platform 29 at the upper part of the closed loop locus, and the seedling is pushed out by the seedling pusher 28b at the lower end of the closed loop locus and planted in the field.

  Further, as shown in FIG. 4, a planting clutch shaft 39 is provided on the transmission upper side of the planting transmission shaft 35 of the transmission case 25, and a planting clutch 38 is provided. The planting clutch 38 is pressed to the left and right sides with a spring 40 interposed therebetween, and the planting clutch 38 is turned on and off by projecting and retracting the clutch pin 41 by an on / off operation of the rod clutch lever 51 described later. It is composed.

  As shown in FIG. 5, the planting clutch 38 is formed with a forward clutch disengagement inclined groove 38a in which the lower side of the forward rotation direction (clockwise in FIG. 5B) is gradually raised and inclined. A clutch pawl 38b for receiving the clutch pin 41 is provided at the lower end of the inclined surface 38a in the forward rotation direction.

  When the clutch pin 41 is inserted and the clutch is disengaged, the tip of the clutch pin 41 moves while contacting the clutch disengagement inclined surface 38a during normal rotation, contacts the clutch pawl 38b, stops the planting clutch 38, and seedling planting The attachment 28 is stopped.

  Further, a reverse clutch release inclined surface 38c is formed on the forward rotation upper side of the forward clutch release inclined surface 38a of the planting clutch 38. The reverse clutch cut inclined surface 38c at the time of reverse rotation forms an inclined surface in which the lower side of the reverse rotation direction (counterclockwise in FIG. 5B) is gradually raised and inclined, and when the clutch pin 41 contacts at the time of reverse rotation, It is configured to cut.

  According to the above configuration, when the continuously variable transmission 20 is switched from forward rotation to reverse rotation, if the planting clutch 38 is not in the disengaged state even when the clutch pin 41 is in the disengaged state, the clutch pin 41 Is operated in contact with the clutch cut inclined surface 38c during reverse rotation, and the planting clutch 38 can be cut off.

  Even when the planting clutch 38 is disengaged at the phase immediately after scraping off the seedling from the front receiving plate 29a of the seedling mount 29 and the continuously variable transmission 20 is switched from forward to reverse, the clutch is disengaged during reverse rotation. The inclined surface 38c keeps the seedling planting tool 28 in the phase immediately after scraping off the seedling, thereby preventing the seedling platform 29 from moving to the front receiving plate 29a, and reducing the resistance of the seedling feeding arm of the seedling platform 29. it can.

  Further, the planting clutch 38 is provided with a clutch cutting inclined surface 38a and a clutch pawl 38b at the time of forward rotation, and the side of the clutch pawl 38b and the outer side of the portion near the clutch pawl 38b of the clutch cutting inclined surface 38a at the time of forward rotation. In addition, a reverse lead cam surface 38d at the time of reverse rotation is formed in which the lower side of the counterclockwise direction, which is the reverse rotation direction, is gradually inclined upward.

  According to the above configuration, when the seedling planting tool 28 is disconnected from the front receiving plate 29a of the seedling mount 29 and the planting clutch 38 is disengaged immediately and the continuously variable transmission 20 is switched from forward to reverse, The seedling planting tool 28 can be stopped in the vicinity of the phase that has passed through the front receiving plate 29a of the seedling mount 29 with a probability of 2 to 1/3, and the seedling planting tool 28 is prevented from being stopped at the seedling scraping position. In addition, mud clogging of the empty planting and the seedling planting tool 28 can be avoided, and the planting operation can be performed smoothly.

  In the conventional device, when the continuously variable transmission 20 is switched from forward to reverse, the planting clutch 38 is provided with the clutch cutting inclined surfaces 38a and 38b during normal rotation to prevent the seedling planting tool 28 from reversing. The attached clutch 38 is configured to be disconnected. In such a configuration, when sparsely planting seedlings, if the rotational speed of the seedling planting tool 28 is reduced to, for example, 1/2 and the planted seedlings are doubled in the front-rear direction, planting There was a problem that the clutch 38 could not be disconnected.

However, the above configuration can solve such a problem.
Further, the planting clutch 38 is provided with a clutch cut inclined surface 38a and a clutch pawl 38b at the time of forward rotation, and further on the lower side of the clutch pawl 38b and at the upper side of the clutch cut inclined surface 38c at the time of reverse rotation. The side portion is provided with a clutch disengagement regulating inclined surface 38e whose upper side in the reverse rotation direction for maintaining the clutch disengaged state is inclined upward.

  According to the above configuration, immediately after the seedling planting tool 28 has planted the seedling in the field, the planting clutch 38 is disengaged, and when the travel operation lever 43 for operating the continuously variable transmission 20 is operated from forward to reverse, the clutch The tip of the clutch pin 41 is supported on the cut restricting inclined surface 38e, and the planting clutch 38 can be maintained in the cut state.

  6 shows the rotational phase of the planting clutch 38, and FIG. 6 (A) shows the phase when the seedling planting tool 28 has passed through the front receiving plate 29a of the seedling platform 29, and FIG. 6 (B). Shows the stop position of the seedling planting tool 28 when the planting clutch 38 is turned off, and FIG. 6C shows the position where the seedling is pushed out by the seedling pusher 28b. The planting clutch 38 can freely rotate in the range of 105 degrees on the lower side in the forward rotation direction from this position, and is configured so that it cannot rotate forward beyond this 105 degrees.

  6 (D) shows the position immediately after the seedling on the seedling platform 29 is sent out by the seedling feeder, FIG. 6 (E) shows the position immediately after the seedling on the seedling platform 29 is sent out by the seedling feeder, FIG. 6F shows a position where the seedling is pushed out by the seedling extrusion rod 28b.

Next, the saddle clutch lever 51 will be described with reference to FIG.
A hook clutch lever 51 is pivotally supported on the front side of the machine body so as to be rotatable about a left and right axis. When the lever is rotated upward, the planting clutch 38 is engaged, and when the lever is rotated forward and downward, it is cut off. It is comprised so that. And this hook clutch lever 51 is comprised long.

  When replenishing seedlings on the seedling platform 29, step 52 is passed between the heel and the front side of the machine body, and when the heel clutch lever 51 is rotated forward and downward, the lever upper end contacts the step 52. In addition, a gap is not formed between the lever and the step 52.

  When there is a gap between the step 52 and the lever 51 when the heel clutch lever 51 is rotated forward and downward and the clutch is disengaged, the operator hooks the foot on the heel clutch lever 51 when the seedling is replenished. There is a risk of entering. However, according to the said structure, such a malfunction can be prevented.

Next, the operation configuration of the seedling stage 29 will be described with reference to FIG.
When the seedling planting operation is started by the seedling planting machine, the seedling mount 29 must be moved to either the left or right side. It is intended to facilitate this operation.

  As shown in FIGS. 8 and 10, the operation panel 10 in the vicinity of the handle 9 is provided with a seedling platform moving button 55 for sliding the seedling platform 29 in the right direction or the left direction. Then, left and right side walls 55L and 55R are attached to the left and right ends of the front receiving plate 29a of the seedling table 29, and it is detected that the seedling table 29 has moved to either the left or right side of the left and right side walls 55L and 55R. End detection switches 55a and 55a are provided.

  When the seedling platform moving button 55 is operated, a lateral movement device is actuated by a command from the controller, and the seedling platform 29 is moved to the side that has been moved before operating the seedling platform moving button 55. .

  With the above configuration, the seedling stage 29 can be moved to either the left or right side simply by operating the seedling stage moving button 55, so that the planting clutch 38 is engaged and the seedling stage 29 is left and right. There is no need for sliding, the work start position of the seedling table 29 can be quickly and accurately adjusted, and work efficiency is improved.

Moreover, as shown in FIG. 9, it is good also as a structure which provides the seedling stand movement button 55 in the back side of the driver's seat 13. As shown in FIG.
In the above configuration, since the seedling platform moving button 55 is arranged at a position that is easy to press when the operator turns to the rear side of the machine body to see the lateral movement of the seedling platform 29, the work efficiency is improved.

  Moreover, you may comprise as shown to FIG. 11 (A) and (B). When the seedling table 29 moves to both left and right ends, the seedling feeding cam 56 of the seedling feeding device rotates counterclockwise, the counter arm 57 rotates clockwise, and the seedling platform end movement detection switch 58 is turned on. Turn on.

  Or you may comprise as FIG. 12 (A) and (B). On the left and right sides of the front receiving plate 29a that receives the seedlings of the seedling table 29, photoelectric type seedling table end movement detection sensors 59, 59 each including a light emitting element and a light receiving element are provided. When the seedling stage 29 moves to both left and right ends, and the light receiving element no longer detects the detection light from the light emitting element, it is determined that the seedling stage 29 has moved to the left and right ends, and is sent to a controller (not shown). Then, the movement of the seedling table 29 is stopped by a command from the controller, and the seedling feeding device is driven to advance the seedling.

Next, based on FIGS. 13A to 13C, another embodiment of the auxiliary seedling placing bases 61 and 61 will be described.
Left and right frame bodies 61a and 61a standing on the left and right sides of the front side of the machine body, upper auxiliary seedling stage 61b and intermediate auxiliary seedling stage 61c provided on the left and right frame bodies 61a and 61a. The lower auxiliary seedling placing table 61d is configured.

  An end portion of the front development plate 62 is pivotally supported around the pin 62a in the left-right direction at the front end portion of the upper auxiliary seedling support 61b, and an end portion of the rear development plate 63 is arranged in the left-right direction at the rear end portion. Is pivotally supported around the pin 63a. Then, when the front deployment plate 62 is housed and rotated rearward, and then the rear deployment plate 63 is housed and rotated forward, the seedling box 64 can be placed on the upper surface of the rear deployment plate 63. It should be noted that stoppers 65,... For locking the seedling box 64 are provided at both front and rear end portions and outer end portions of the rear development plate 63.

  According to the configuration, as shown in FIGS. 13B and 13C, when the front development plate 62 and the rear development plate 63 are deployed back and forth, the front deployment plate 62, the upper auxiliary seedling support 61b and the rear deployment are developed. The plate 63 makes it possible to configure the seedling feed rails that are inclined downward in the front-rear direction, so that the seedling box 64 can be easily supplied from the front side to the rear seedling placing table 29.

3 Seedling planting device 20 Hydraulic stepless transmission device 29 Seedling stand 28 Seedling planting tool 28a Planting claw 28b Planting basket 38 Planting clutch 38a Clutch cutting inclined surface 38b during normal rotation Clutch claw 38c Clutch cutting tilt during reverse rotation Surface 38e Clutch disengagement restricting inclined surface 41 Clutch pin 43 Traveling lever

Claims (3)

A hydraulic continuously variable transmission (20) that changes the traveling speed and forward / reverse travel of the traveling vehicle body, a traveling operation lever (43) that operates the hydraulic continuously variable transmission (20), and a seedling provided in the traveling vehicle body A seedling planting claw (28a) for scraping seedlings from a seedling platform (29) of the planting device (3), and a planting basket (28b) for pushing the seedlings scraped by the seedling planting nails (28a) to the field. A seedling planting tool (28), a planting clutch (38) for turning on / off power transmission to the seedling planting device (3), and a clutch pin (41) for turning on / off the planting clutch (38) The planting clutch (38) has a clutch cutting inclined surface (38a) for forward rotation receiving the clutch pin (41) and a clutch pin (38a) on the lower end of the normal rotation clutch cutting inclined surface (38a). 41) In a seedling transplanter equipped with a clutch pawl (38b) for receiving ,
A clutch disengagement inclined surface (38c) at the time of reverse rotation is provided on the upper side of the forward rotation direction of the clutch disengagement inclined surface (38a) at the time of forward rotation, and the lower side of the reverse rotation direction sequentially rises and inclines, and the clutch pawl (38b) has a clutch. If the planting clutch (38) does not become disengaged even when the pin (41) comes into contact, the clutch pin (41) contacts the clutch disengagement inclined surface (38c) during reverse rotation and the planting clutch (38). A seedling transplanting machine, characterized in that it is configured to cut the chopping.   When the traveling operation lever (43) is switched from forward to reverse immediately after the seedling planting tool (28) has planted seedlings in the field, the clutch pin (41) is brought into the clutch cut inclined surface (38c) during reverse rotation. The seedling transplanting machine according to claim 1, wherein the planting clutch (38) is brought into a disconnected state by contact.   The planting clutch (38) has a lower side in the forward rotation direction than the clutch pawl (38b) and a lower side in the reverse rotation direction on the lower side portion in the reverse rotation direction of the clutch cut inclined surface (38c) at the time of reverse rotation. A clutch disengagement regulating inclined surface (38e) is formed, and immediately after the seedling on the seedling stand (29) is sent out, the continuously variable transmission (20) is switched from forward to reverse to disengage the planting clutch (38). The planting clutch (38) is maintained in a disengaged state until the clutch pin (41) passes through the clutch disengagement regulating inclined surface (38e). The seedling transplanter described.

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