JP2014064528A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanter capable of digging an enlarged hole to become a bottom, while planting seedling, at predetermined positions to form seedling planting holes.SOLUTION: A seedling transplanter comprises: a seedling planting device U mounted on a mobile machine body T and having a seedling planting tool U1 caused by the rotations of a planting drive shaft 30 to move periodically up and down and to protrude into a ridge R thereby to implant seedling N while forming seedling planting holes W1; and a seedling feeder K arranged above the seedling planting device U for feeding the seedling N to the seedling planting tool U1 at an elevated position. Further comprised is an enlarged hole digging mechanism 130 for forming enlarged holes W2 shallower and larger than the seedling planting holes W1, in front of the seedling planting tool U1 of the seedling planting device U, from this side to the front of the formation scheduled positions of the seedling planting holes W1. The enlarged hole digging mechanism 130 is equipped with a spade member 131 made movable up and down in association with the vertical movements of the seedling planting tool U1, thereby to form a cup-shaped enlarged holes W2 having bottoms at the positions which are scheduled to form the seedling planting holes W1.

Description

  The present invention relates to a seedling transplanter for transplanting seedlings such as tobacco seedlings and lettuce seedlings.

  As disclosed in Patent Document 1, the seedling transplanter forms recesses at appropriate front and rear intervals on the upper surface of the heel in front of the transplanting mechanism in the seedling transplanting machine including the seedling supply device and the seedling planting device. The seedling planting device is provided with a transfer mechanism including a seedling picking claw for transferring the pot seedling from the seedling supply device to the transplanting cup at the raised position, and the transplanting cup is raised. When in position, the mulching device is interlocked so that the mulching body is held for a certain interval below the heel surface, and when the transplanting cup is lowered, the mulching body is held at a position above the heel surface. It is configured.

  The earthing device is configured to rotate the rotating piece with a cam plate via a rotating lever and a turnbuckle, and push the earthing body downward from the upper surface of the ridge against the urging force of the torsion spring. The pushing-down timing is executed while the transplanting cup is stopped for a certain period of time at the raised position, and the mulcher is held for a certain interval at a level below the upper surface of the ridge. When the transplanting cup is lowered, the driven roller is positioned in a phase without the cam plate, and interlocks so that the mulching body is held at a position above the upper surface of the ridge by the biasing force of the torsion spring.

JP 2000-175513 A

  In the prior art, since the mulching body is held for a certain section below the upper surface of the ridge, the concave portion (enlarged hole) formed has a flat bottom, making it difficult for irrigation to concentrate on the seedling. The timing when the transplanting cup is pushed downward from the upper surface of the heel is executed while the transplanting cup is stopped for a certain period of time at the ascending position. It is necessary to increase the distance between the strains or to reduce the traveling speed of the seedling transplanting machine, and it is difficult to increase the efficiency of the digging transplanting operation.

It is an object of the present invention to provide a seedling transplanter that can solve such problems of the prior art.
The present invention expands the bottom at the planned formation position of the seedling planting hole while planting the seedling by performing an expansion hole digging operation with the eaves member during the transplanting operation in which the seedling planting tool descends and rises An object of the present invention is to provide a seedling transplanter capable of digging a hole.

Specific means for solving the problems in the present invention are as follows.
First, a mobile machine body T that can be moved across the ridge R, and is periodically moved up and down by the rotation of the planting drive shaft 30 provided in the mobile machine body T to enter the ridge R and plant seedlings. A seedling planting device U having a seedling planting tool U1 for planting the seedling N while forming the attachment hole W1, and a seedling N to the seedling planting tool U1 disposed above the seedling planting device U and in the raised position A seedling supply device K for supplying seedlings, and shallower than the seedling planting hole W1 from the front to the front of the position where the seedling planting hole W1 is to be formed in front of the seedling planting tool U1 of the seedling planting device U. An enlarged hole digging mechanism 130 for forming a large enlarged hole W2 is provided,
The enlarged hole digging mechanism 130 moves up and down in conjunction with the up and down movement of the seedling planting tool U1, thereby forming a bowl-shaped enlarged hole W2 that becomes the bottom at the planned formation position of the seedling planting hole W1. 131.

Secondly, the enlarged hole digging mechanism 130 includes a support rod 132 pivotally supported by the mobile body T and attached with the rod member 131, an urging member 133 for urging the support rod 132 upward, And an actuating member 134 for lowering the support rod 132 by the rotation of the attached drive shaft 30.
Third, the actuating member 134 is provided with timing adjusting means 136 for adjusting the timing of lowering the support rod 132 by the actuating member 134.

Fourthly, an upper limit setting means 145 for setting an upper limit for raising the support rod 132 by the urging member 133 is provided between the mobile machine body T and the support rod 132.
Fifth, the support rod 132 is provided with a rod release means 150 for releasing the rod member 131 rearward and upward when a large resistance is applied to the rod member 131.
Sixth, the planting drive shaft 30 supports a link shaft 85c via an arm 85b on a short shaft 85a to which rotational power is transmitted, and pivotally supports the base portion of the swing arm 135 on the link shaft 85c. The operating member 134 is pivotally supported at the tip of the swing arm 135,
The actuating member 134 is in contact with the base of the swing arm 135 and restricts upward rotation, and the planting drive shaft 30 is rotated and the control portion 134 a is in contact with the base of the swing arm 135. In this state, the push-down portion 134b that rotates downward and contacts and lowers the support rod 132, and the swing guide portion that is engaged with the support rod 132 and receives a swing force in a direction separating the push-down portion 134b from the support rod 132. 134c.

  Seventhly, the seedling planting device U is pivotally supported by a pair of first links 26 pivotally supported by the mobile machine body T and a planting rocking body 27 provided on the first link 26, and at the tip. A pair of second links 28 that support the seedling planting tool U1, a rotating arm 29 connected to one of the pair of second links 28, and a planting drive shaft 30 that rotationally drives the rotating arm 29 are provided. The enlarged digging mechanism 130 is located below the first link 26, the planting rocking body 27, and the second link 28.

ADVANTAGE OF THE INVENTION According to this invention, the expansion hole which becomes a bottom in the formation planned position of the hole for seedling planting can be dug while planting a seedling.
That is, in the invention according to claim 1, the seedling planting tool U <b> 1 moves up and down in conjunction with the vertical movement of the seedling planting tool U <b> 1, so that the seedling planting hole W <b> 1 is formed at the bottom. Since it has the heel member 131 that forms the cocoon-shaped enlarged hole W2, it has a cocoon-like shape that becomes the bottom at the planned formation position of the seedling planting hole W1 in conjunction with the seedling transplanting operation by the seedling planting tool U1. The enlarged hole W2 can be formed efficiently.

According to the second aspect of the present invention, the rod member 131, the support rod 132 to which the rod member 131 is attached, the biasing member 133 that biases the support rod 132 upward, and the planting drive shaft 30 are rotated downward. A mechanism that forms the enlarged hole W2 in conjunction with the transplanting operation of the seedling planting tool U1 can be simply configured with the actuating member 134 that moves and lowers the support rod 132.
According to the third aspect of the present invention, since the timing adjusting means 136 is provided on the operating member 134, the timing at which the support rod 132 is lowered by the operating member 134 can be adjusted.

  In the invention according to claim 4, since the upper limit setting means 145 is provided between the mobile machine body T and the support rod 132, the lower edge of the flange member 131 is limited by limiting the rise of the support rod 132 by the urging member 133. It becomes possible to arrange 131a at a position close to the upper surface of the ridge R, and the ridge member 131 that has come out of the ridge R after forming the enlarged hole W2 can scrape the earth of the ridge R pushed by the ridge member 131 itself. .

According to the fifth aspect of the present invention, the hook member 131 hits a stone or the like because the hook member 131 is provided in the support rod 132 and the hook member 131 is released rearward and upward when a large resistance is applied to the rod member 131. Sometimes it can be escaped, and damage to the eaves member 131, the support eaves 132, etc. can be prevented.
In the invention according to claim 6, the planting drive shaft 30 can directly push down the support rod 132 to which the rod member 131 is attached by the operating member 134 provided at the tip of the swing arm 135 to which the rotational power is transmitted. It is possible to dig a powerful hole.

  In the invention according to claim 7, since the enlarged digging mechanism 130 is disposed below the first link 26, the planting rocking body 27, and the second link 28 of the seedling planting device U, the enlarged digging mechanism 130 is The transplanting operation of the seedling planting tool U1 is not hindered, and the expansion hole W2 can be drilled simultaneously with the seedling transplanting operation.

1 is an overall perspective view of a seedling transplanter showing an embodiment of the present invention. It is the same whole side view. It is the same whole top view. It is a side view of a mobile body. It is a top view of a mobile body. It is a side view of a seedling planting device and a seedling supply device. It is a top view of a seedling planting device and a seedling supply device. It is a side view of a seedling supply device. It is a top view of a seedling supply device. It is a side view of the principal part of a seedling supply device. It is a rear view of the principal part of a seedling supply device. It is a top view of the principal part of a seedling supply device. It is a side view of a supply interlocking means. It is a side view of an engagement rotary body. It is a side view of a seedling planting apparatus. It is a top view of a seedling planting apparatus. It is a side view of the principal part of a seedling planting apparatus. It is a top view of the principal part of a seedling planting apparatus. It is a side view at the time of a seedling planting operation start of a seedling planting device. It is a side view during the seedling planting operation of the seedling planting apparatus. It is a side view of the expansion hole digging mechanism of a seedling planting apparatus. It is explanatory drawing which shows the first half of the digging operation | movement of an expansion digging mechanism. It is explanatory drawing which shows the digging operation | movement latter half of an expansion digging mechanism. It is a side view of the operation member of an expansion hole digging mechanism. It is a side view which shows the modification of an enlarged digging mechanism.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1-3, while walking in the longitudinal direction across the ridge R, walking to plant seedlings N called cell-molded seedlings such as cigarettes and vegetables, soil block seedlings, pot seedlings at predetermined intervals A mold seedling transplanter 1 is illustrated.
The seedling transplanting machine 1 is roughly divided into a movable mobile body T that can travel, a seedling planting device U that is provided at the rear of the mobile body T, and a seedling planting device U that is provided at the upper rear of the seedling transplanting device U. A seedling supply device K that supplies the seedling N to the attaching device U and a seedling stand Y that is disposed on the front upper part of the mobile machine body T over the left and right sides are provided.

  The mobile body T has a base 7 projecting forward from the mission case M and mounted with an engine (drive source) E on its upper part, and a main frame 8 connecting the front frame and the rear frame is attached to the rear of the mission case M, The machine body T1 is constituted by these, and the steering handle H is connected to the rear portion of the machine body T1, that is, the rear end of the main frame 8. The front case (front traveling device) 40 and the rear wheel ( The rear traveling device 41 is suspended.

The left and right front wheels 40 as the front traveling devices are tire wheels that roll in the inter-groove grooves, respectively, and the left and right positions can be adjusted with respect to the mobile machine body T. The left and right rear wheels 41 as the rear traveling device are also a pair of left and right tire wheels that roll in the intercostal grooves, and the left and right positions can be adjusted with respect to the mobile machine body T.
In FIG. 1 to FIG. 7, in a transmission case M, the power from the engine E is input via the belt transmission means 52, the power is shifted via a power transmission mechanism 53 having a clutch, a transmission mechanism, and the like. The driving power is output from the transplantation output shaft 55.

The travel output shaft 54 penetrates the mission case M and protrudes left and right. The telescopic transmission shaft 57 is connected to both left and right ends, and the tip shaft 58 is directly connected to the tip of the telescopic transmission shaft 57. The tip shaft 58 is inserted into and supported by the axle case 59.
The axle case 59 has an attachment member 61 fixed to the side surface of the transmission case M, an outer cylinder case 59A supported by the attachment member 61, and an inner cylinder case 59B inserted into the outer cylinder case 59A.

The mounting member 61 has a travel output shaft 54 inserted therein, and an outer cylinder case 59A supported rotatably around the travel output shaft 54. A rear interlocking arm 66 is provided on the outer cylinder case 59A. Yes. The inner cylinder case 59B has a rectangular tube shape, and is inserted into the outer cylinder case 59A so as to be integrally rotatable and adjustable in the left-right direction.
The upper end of the rear wheel transmission case 62 is connected to the outer end in the left-right direction of the inner cylinder case 59B, the tip shaft 58 is supported on the upper portion of the rear wheel transmission case 62, and the rear wheel 41 is supported on the lower portion. A wheel shaft 63 is supported, and chain transmission means 64 is provided between the tip shaft 58 and the wheel shaft 63.

The power from the travel output shaft 54 is transmitted to the rear wheel 41 via the telescopic transmission shaft 57, the tip shaft 58, the chain transmission means 64, and the wheel shaft 63. It should be noted that the rear wheel 41 can be changed in position in the left-right direction with respect to the wheel shaft 63.
Each of the left and right front wheels 40 is rotatably supported by a lower portion of a front wheel support arm 67 via a front shaft 67a, and a rectangular tube portion 67b is provided on the upper portion of the front wheel support arm 67. It can be mounted in such a way that its position in the left-right direction can be changed and can be swung together.

The left and right inner end sides of the left and right front corner shafts 68 are supported by a front support bracket 69 provided at the front lower portion of the gantry 7 so as to be rotatable around the front horizontal shaft 69a. A front interlocking arm 70 is attached to the angular shaft portion of the front angular shaft 68 so as to be integrally rotatable, and an interlocking rod 71 is connected to the tip of the front interlocking arm 70.
The rear end of the interlocking rod 71 is connected to the rear interlocking arm 66 of the outer cylinder case 59A, and the rotation of the outer cylinder case 59A is transmitted to the front angle shaft 68. The angle of the rear wheel transmission case 62 centered on the outer cylinder case 59A and the angle of the front wheel support arm 67 centered on the front angle shaft 68 are simultaneously changed to the same angle, so that the mobile body T can be raised and lowered in a horizontal posture. ing.

  The left and right front corner shafts 68 and the left and right outer cylinder cases 59A are fitted with front and rear portions of a front and rear support 72 so as to be relatively rotatable. The case M is connected to a fixed pipe attachment body 73 on the bottom surface of the case M, and the front end shaft 68 and the outer cylinder case 59A are projected from the mobile body T by the front and rear support bodies 72 and the attachment body 73. The part is rotatably supported.

2 to 5, an elevating mechanism 42 is provided between the gantry 7 of the mobile machine body T and the rear wheel transmission case 62. The platform 7 is provided with a lifting cylinder 75 for moving up and down the mobile body T and a shaft support 76 that is pushed and pulled back and forth by the lifting cylinder 75, and a rolling shaft 77 is rotatably supported by the shaft support 76. Has been.
Lifting levers 77a and 77b and a rolling arm 77c are fixed to the rolling shaft 77. The elevating levers 77a and 77b protrude from the left and right ends of the rolling shaft 77 in diametrically opposite directions, and are connected via an interlocking member 79 and an interlocking link 79 provided on the outer cylinder case 59A, to the tip of the rolling arm 77c. Is connected to a rolling cylinder 74 supported by a shaft support 76.

  When the rolling cylinder 74 extends and contracts, the rolling shaft 77 is rotated via the rolling arm 77c, the lifting levers 77a and 77b are swung in the opposite directions, and the left and right outer cylinder cases are connected via the interlocking member 78 and the interlocking link 79. By rotating 59A in the reverse direction, one of the left and right sides of the mobile body T is raised and the other is lowered to tilt left and right. These constitute the rolling means of the lifting mechanism 42.

The telescopic operation of the lift cylinder 75 causes the shaft support 76, the rolling shaft 77, and the lift levers 77a and 77b to move back and forth integrally, and rotate the left and right outer cylinder cases 59A in the same direction via the interlocking member 78 and the interlocking link 79. The mobile body T is moved up and down. These constitute the lifting means of the lifting mechanism 42.
The elevating mechanism 42 may be constituted only by elevating means that causes the moving body T to elevate by the elevating cylinder 75, omitting rolling means such as the rolling arm 77c and the rolling cylinder 74.

5-9, the main frame 8 is attached to the rear part of the transmission case M, and a planting frame 82 is attached to the lower side of the main frame 8, and the left and right sides (left side) of the planting frame 82 are operated. A transmission case 83 is attached.
The front part of the work transmission case 83 is located on the side surface of the transmission case M and supports the front shaft 84 directly connected to the transplantation output shaft 55, and the rear part of the work transmission case 83 supports the drive shaft 85, A chain transmission means is provided between 84 and the drive shaft 85, and the drive shaft 85 serves as a common power transmission shaft for the seedling planting device U and the seedling supply device K.

  The driving shaft 85 has a concentric left and right short shaft 85a pivotally supported by the planting frame 82, an arm 85b provided at the inner ends of both the short shafts 85a, and a link shaft 85c installed on the left and right arms 85b. 7 and 9, the left short shaft 85a and the link shaft 85c constitute a planting drive shaft 30 for driving the seedling planting device U, and the right short shaft 85a. Controls the seedling supply device K.

6 to 14, the seedling supply device K includes a turntable S that can rotate intermittently about a vertical axis 10, and a seedling supply that is arranged around the turntable S, stores seedlings N, and can be dropped. A tool K1 and a supply drive mechanism K2 for driving the turntable S in synchronization with the vertical movement of the seedling planting tool U1 are provided.
The right short shaft 85a of the driving shaft 85 is a transmission start end of the supply interlocking means 13 of the supply drive mechanism K2. A brake disc 86 is fixed to the right short shaft 85a, and a concave portion is formed on the outer periphery of the brake disc 86. In addition, the roller 87a of the brake arm 87 is elastically pressed by a spring 87b, and the brake disc 86 is braked so that the right short shaft 85a stops at a fixed position.

  An interlocking rod 88 is pivotally connected to the brake disk 86, and the interlocking rod 88 is connected to a first arm 89 pivotally supported by the main frame 8, and the first arm 89 is provided on the intermediate shaft 90. The second arm 91 provided on the intermediate shaft 90 can swing integrally with the second arm 91, and the supply interlocking member 17 that rotates the turntable S is connected to the second arm 91. The first arm 89 and the second arm 91 may be integrally formed with a bell crank.

A support member 19 is erected on the main frame 8, and a vertical axis support portion 19 a to which a vertical axis 10 that rotatably supports the turntable S is attached and a horizontal axis 14 are rotatable. A horizontal axis support portion 19b to be supported and a peripheral support portion 19c are provided.
In the turntable S, a large number of seedling supply tools K1 are arranged at equal intervals in the circumferential direction around the disk. The seedling supply tool K1 includes a supply cup 34 having an outer supply cup 34a and an inner supply cup (sleeve) 34b inserted therein and substantially containing the seedling N, and below the bottom opening of the outer supply cup 34a. And a shutter 35 that can be opened and closed via a hinge 35a and receives the seedling N. The hinge 35a of the shutter 35 may be supported on the lower surface of the turntable S separately from the non-supply cup 34a.

Fifteen seedling supply tools K1 are provided. The number of seedling supply tools K1 may be 7 or 8. However, it is preferable to arrange 13 to 17 seedling supply tools. By increasing the number, the transplanting speed can be doubled to perform the transplanting operation. Every 15 supply cups 34 are marked so that two accompanying workers supply the seedlings N alternately.
The disc of the turntable S is made of sheet metal, and an engagement portion 11 formed as a hole that can engage with sprocket teeth is formed in the vicinity of the seedling supply tool K1 and on the inner peripheral side of the array of the seedling supply tool K1. Are arranged in a ring around the center.

Both the outer supply cup 34a and the inner supply cup 34b have a trumpet shape whose inner diameter is increased from the lower side to the upper side, and the inner supply cup 34b can be replaced with one having a different inner diameter according to the size of the seedling N to be transplanted. ing.
Below the turntable S, a shutter closing member 36 that opens and closes the shutter 35 is received by the peripheral support portion 19 c of the support member 19. The shutter closing member 36 has a bar formed in a partially circular shape in a plan view and is disposed close to the lower surface of the shutter 35 of the seedling supply tool K1.

The turntable S rotates clockwise in FIGS. 9 and 12, and the seedling supply tool K1 on the turntable S opens the shutter 35 at the position moved to the center in the left-right direction of the main frame 8 and supplies the seedling N by dropping. It becomes seedling supply position P.
The shutter closing member 36 has a part of the circular cutout corresponding to the seedling supply position P. The shutter 35 is opened from the front of the seedling supply position P other than the seedling supply position P to immediately before the seedling supply position P. The shutter 35 is closed from the posture, and the shutter closing member 36 is cut out at the seedling supply position P, whereby the shutter 35 is released.

  The substantially C-shaped shutter closing member 36 has an arcuate shape concentric with the turntable S and a halfway closing portion 36b that places the shutter 35 in a closed position, and a midway closing portion 36b that is inclined upward from the front of the seedling supply position P. A start end closing portion 36c that connects and closes the shutter 35 from the open posture, and a minute lower moving portion 36a whose upper surface is lower than the upper surface of the intermediate closing portion 36b from the midway closing portion 36b to the seedling supply position P is formed.

The slight downward movement part 36a of the shutter closing member 36 is a part for slightly moving the stored seedling N slightly away from the supply cup 34 by slightly separating the shutter 35 from the portion before the seedling supply position P. FIGS. 10 and 11, it is inclined downward from the midway closing portion 36b to the seedling supply position P.
The seedling N with large leaves spread in the state where it is stored in the supply cup 34, the leaf may be caught in the upper mouth, and drop resistance may occur. If the seedling N in the storage state is slightly moved down, it will fall in advance. It can be in a posture, the resistance of the leaf with the supply cup 34 is reduced, and when the shutter 35 is fully opened, the fall timing of the seedling N can be smoothly and reliably dropped.

As shown in the modified example shown in FIG. 19, the minute lower moving portion 36a of the shutter closing member 36 is bent downward from the midway closing portion 36b and extends to the front of the seedling supply position P at a horizontal portion lowered by one step. Also good.
10 to 14, the engagement rotating body 12 and the intermittent engagement body 15 are fixed to the horizontal shaft 14 below the turntable S, and the intermittent rocking body 16 is supported so as to be swingable.

The engaging rotator 12 is formed of a sprocket and is engaged with an engaging portion 11 formed as a sprocket hole, and is engaged with the engaging portion 11 by the rotation of the horizontal shaft 14 to rotationally drive the turntable S. .
The intermittent engagement body 15 has protrusions 15a projecting at equal intervals on the outer periphery of the disc, and latching portions 15b are formed at both ends in the circumferential direction of the projections 15a. The ratchet engages with the latching portions 15b in one direction. A claw-shaped engagement claw 18 is provided on the intermittent rocking body 16.

The intermittent rocking body 16 is pivotally supported by the horizontal shaft 14 in the middle, one end is arm-shaped, and the tip of the engagement claw 18 and the tip of the supply interlocking member 17 are connected via a common pin 94 to the other end. A fan-shaped claw releasing portion 21 is formed on the upper and lower sides, and is rocked by the push-pull movement of the supply interlocking member 17 to move the engagement claw 18 along the outer periphery of the intermittent engagement body 15.
The engaging claw 18 has an abutting portion 18a at one end, and the abutting portion 18a abuts against the stopper 16a of the intermittent rocking body 16, whereby the clockwise rotation is restricted in FIGS. The pulling movement of the supply interlocking member 17 causes the engaging claw 18 to engage with the latching portion 15b of the intermittent swinging body 16 to rotate the intermittent swinging body 16 by a certain angle. The pawl 18 rotates backward in the counterclockwise direction so that the intermittent rocking body 16 does not rotate.

The support member 19 is provided with forward and reverse ratchet claws 20 </ b> A and 20 </ b> B via stays on the front side of the intermittent engagement body 15 and the intermittent rocking body 16. The forward / reverse ratchet pawls 20A and 20B can be brought into contact with the outer peripheral surface of the intermittent engagement body 15, and are urged in a direction in which the interval is narrowed by a tension spring.
The reverse rotation ratchet pawl 20B engages with the one-way latching portion 15b of the intermittent engagement body 15 with which the engagement claw 18 is engaged, and restricts the reverse rotation of the intermittent engagement body 15 (reverse rotation of the turntable S).

The forward rotation ratchet pawl 20A is a latching portion 1 in the opposite direction of the intermittent engagement body 15 with which the engagement pawl 18 is engaged.
5b is engaged, and the forward rotation of the intermittent engagement body 15 (forward rotation of the turntable S) is restricted.
The forward rotation ratchet pawl 20A can come into contact with the fan-shaped pawl release portion 21 of the intermittent rocking body 16, and the engagement pawl 18 engages with the latching portion 15b to rotate the intermittent engagement body 15. When the claw releasing portion 21 comes into contact with the forward rotation ratchet claw 20A and retracts it from the position where it engages with the latching portion 15b, the forward rotation restriction of the intermittent engagement body 15 by the forward rotation ratchet claw 20A is released. Thus, the intermittent engagement body 15 can be normally rotated, and the engagement claw 18 and the intermittent rocking body 16 can rotate the intermittent engagement body 15, the horizontal shaft 14, and the engagement rotation body 12.

The supply drive mechanism K2 is constituted by the engaging portion 11 of the turntable S, the engagement rotator 12, and the supply interlocking means 13. The supply interlocking means 13 includes the right short shaft 85a of the driving shaft 85, the brake disk 86, and the interlocking. The rod 88, the first arm 89, the second arm 91, the supply interlocking member 17, the intermittent rocking body 16, the intermittent engagement body 15 and the like are configured.
The supply interlocking member 17 is connected to a driving shaft 85 that drives the seedling planting tool U1, and power is transmitted from the driving shaft 85, thereby synchronizing with the seedling planting tool U1. The supply interlocking member 17 is reciprocated once per rotation, the intermittent engagement body 15 is rotated by one interval of the latching portion 15b, and the turntable S is intermittently rotated by one interval of the seedling planting tool U1. .

  6, 7, 15 to 21, the seedling planting device U includes a pair of first links 26 pivotally supported on the front upper part of the planting frame 82 of the mobile machine body T, and the pair of first links 26. The planted rocking body 27, a pair of second links 28 that are pivotally supported by the planted rocking body 27 and extend rearward and upward, and are supported at the tips of the pair of second links 28 so as to be freely opened and closed. A seedling planting tool U1, a rotary arm 29 connected to one of the pair of second links 28 via a link shaft 85c, a planting drive shaft 30 for driving the rotary arm 29, and a discharge means 95 are provided. In addition, a pressure reducing wheel 101, a planting depth adjusting mechanism 44, an enlarged digging mechanism 130, and the like are also provided.

  The planting drive shaft 30 and the rotary arm 29 are a short shaft 85a and an arm 85b on the left side of the driving shaft 85, and the link shaft 85c revolves via the arm 85b when the short shaft 85a rotates once. The seedling planting tool U1 at the tip of the second link 28 is vertically long while being constrained by the swinging of the pair of first links 26 by rotating the front and rear intermediate portions of the pair of second links 28 in a circular shape. The elliptical locus L is moved.

The seedling planting tool U1 has a substantially bowl shape in a side view of the internal cavity, and is opened so that the seedling N can be supplied to the support body 96 from the upper side, and the support body 96 attached to the tips of the pair of second links 28. It has a guide member 97 and a pair of front and rear scissors members 98 which are pivotally supported by the support body 96 and whose lower portions can be inserted into the scissors R.
The pair of heel members 98 are pivotally supported at the upper part so that the lower part can be opened and closed. The seedlings are held inside while entering the ridges R by periodic (intermittent) vertical movement to form the seedling planting holes W1. N is configured to be released downward.

The discharge means 95 includes a support arm 95 a attached to the planting rocking body 27, a rod 95 b connecting the support arm 95 a and one hook member 98, and the other hook member 98 in conjunction with the other hook member 98. It has an interlocking pin 95c for swinging 98 oppositely.
When the seedling planting tool U1 is lowered to the vicinity of the bottom dead center of the vertical movement range, one hook member 98 swings outward by the rod 95b and the support arm 95a of the discharge means 95, and the one hook member 98 Oscillation causes the other hook member 98 to swing in the opposite direction by the interlocking pin 95c, whereby one hook member 98 is opened.

  The seedling planting tool U1 is in a state in which the pair of heel members 98 are closed at the top dead center of the vertical movement range, and is positioned immediately below the seedling feeding tool K1 of the turntable S at the seedling feeding position P, and the seedling feeding tool K1. The seedlings N are fed from the top dead center, moved forward and downward from the top dead center, rushed into the heel R from the middle, and the pair of heel members 98 were opened as the bottom dead center was approached to form a seedling planting hole W1. At the same time, the seedling N is released, and after the seedling is released, the pair of heel members 98 are closed and moved rearward and upward.

The back-and-forth movement of the seedling planting tool U1 in the substantially elliptical locus L is canceled because the mobile body T is moving forward, and the seedling planting tool U1 enters in a posture that is nearly perpendicular to the heel R and is nearly perpendicular. Pull out in a posture and plant the seedling N in a substantially upright posture.
In FIGS. 1, 2 and 15, a pair of left and right pressure-reducing wheels 101 are disposed behind the seedling planting tool U1. The left and right pressure-reducing wheels 101 are supported on the rear side of the planting frame 82 through a support mechanism 102 so as to be adjustable in height, and roll on both the left and right sides of the planting position of the seedling N on the upper surface of the heel R. The soil on both the left and right sides of the seedling N introduced into the seedling planting hole W1 formed by K1 is pressed to cover the soil.

  2, 3, 6 to 9, 15, and 16, a grounding body 43 that is grounded and rolled to detect the upper surface of the ridge R and level the ground is disposed in front of the seedling planting tool U <b> 1. This grounding body 43 constitutes a planting depth adjusting mechanism 44 that adjusts the height of the mobile machine body T and the seedling planting tool U1 relative to the upper surface of the ridge and sets the planting depth of the seedling planting tool U1. The planting depth adjusting mechanism 44 is adjusted by an adjusting lever 45.

The grounding body 43 has a substantially drum shape (or a cylindrical shape) that rolls over a wide range at a position where the seedling N on the upper surface of the pod is to be planted, and is rotatable around the horizontal axis via a support shaft 106 at the rear portion of the support frame 105. It is supported. The left and right front portions of the support frame 105 are pivotally supported by a mounting body 73 fixed to the lower portion of the transmission case M via a support shaft 107 so as to be swingable up and down.
A cylindrical material 111 is fitted on the left support shaft 107, and a first sensor arm 108 is provided on the cylindrical material 111, and an upper end of the first sensor arm 108 is lifted via a second sensor arm 109. 110, the lift valve 110 is disposed in the upper part of the transmission case M and controls the lift cylinder 75.

  Further, the cylinder member 111 is provided with a bifurcated arm 112, and a spring 113 is provided between the first arm 112 a of the bifurcated arm 112 and the support frame 105 to urge the grounding body 43 toward the flange R side. The front end of the outer cable 114a of the Bowden cable 114 for connecting to the adjustment lever 45 is connected to the second arm 112b of the bifurcated arm 112. The rear end of the outer cable 114 a is attached to a cable attachment portion 119 that is fixed to the rear portion of the main frame 8.

The adjustment lever 45 is pivotally supported at the rear portion of the main frame 8 via a pivot shaft 117, and the cable arm 118 that rotates integrally with the adjustment lever 45 and the support frame 105 are connected by an inner cable 114 b of the Bowden cable 114. The tip of the inner cable 114 b is hooked on the support frame 105.
By operating the adjustment lever 45 back and forth, the angle between the support frame 105 and the first sensor arm 108 changes via the Bowden cable 114, and the support frame 105 swings up and down to change the height of the grounding body 43. Then, the relative heights of the mobile body T and the seedling planting tool U1 with respect to the grounding body 43 are adjusted. The bottom dead center of the vertical movement of the seedling planting tool U1 is determined by the height of the grounding body 43 when the lifting valve 110 is in the neutral state, and the depth of penetration from the upper surface of the heel R is determined. The planting depth of the attachment U1 is set.

  When the grounding body 43 is grounded to the heel R at the set height, the lift valve 110 is in a neutral state and the mobile machine body T is not raised or lowered, but when the height of the grounded heel R changes, for example, When the height is increased, the grounding body 43 and the support frame 105 swing upward, and the first sensor arm 108 is moved downward via the tubular member 111 and the two-arm 112, thereby operating the lift valve 110 and moving the lift cylinder 75. The front and rear wheels 40 and 41 are pushed down and the moving body T is relatively raised, and the seedling planting tool U1 is adjusted to the set height from the upper surface of the heel R.

  When the adjustment lever 45 swings forward, the support frame 105 moves downward via the inner cable 114b, the grounding body 43 moves downward from the mobile machine body T, and the first sensor arm 108 and the second sensor arm 109 move upward. Then, the elevating valve 110 is operated to control the elevating cylinder 75 to the ascending side. Therefore, the height of the mobile body T and the seedling planting tool U1 is increased from the upper surface of the cocoon, and the planting depth by the seedling planting tool U1 is shallow, that is, the height of the bottom dead center of the seedling planting tool U1 is shallow. Become.

Conversely, when the adjustment lever 45 is swung rearward, the support frame 105 moves upward, and the lifting cylinder 75 is controlled to the lowering side via the first sensor arm 108, the second sensor arm 109, and the lifting valve 110, and is grounded. The body 43 approaches the mobile machine body T, the height of the mobile machine body T and the seedling planting tool U1 is lowered from the upper surface of the heel, and the planting depth by the seedling planting tool U1 is increased.
2, 8, and 15, the height of the ridge R is displayed in two stages, but the planting depth adjusting mechanism 44 shows a state in which the planting depth is set relatively deep, and the pressure reducing wheel 101 Shows a state where the mobile body T is relatively lowered when the mobile body T is raised.

  A guide member 120 is provided at the rear portion of the main frame 8 to guide the swinging of the adjustment lever 45 back and forth. The guide member 120 and the adjustment lever 45 are arranged on the side of the turntable S. The grip portion 45a is disposed in front of the grip portion of the steering handle H and on the left and right sides of the turntable S, and is disposed at substantially the same height as the seedling supply tool K1 of the turntable S.

In FIGS. 1 to 3, in front of the grip portion of the steering handle H and on the left and right sides of the turntable S, an accompanying space where an operator who supplies the seedling N to the seedling supply tool K1 can be accompanied with the seedling transplanter 1. The operator in the left accompanying space G can operate the adjustment lever 45 in the same posture while supplying the seedling N to the seedling supply tool K1.
A seedling stand Y is arranged in the upper front part of the mobile machine body T. This seedling stage Y has two upper and lower standby seedling stands Y1 attached to a frame 123 erected on the left and right front and rear supports 72, and the rear ends of the left and right upper standby seedling stands Y1 are connected by a supply seedling stand Y2. Yes.

The seedling N supplied to the seedling supply tool K1 is grown in a state of being put in a cell tray (nursing seedling tray), and is placed on the spare seedling stand Y1 and the supply seedling stand Y2 together with the cell tray, and on the supply seedling stand Y2. When the seedling N is supplied from the seedling N to the seedling supply tool K1 and the seedling N on the supply seedling stand Y2 disappears, the one on the preliminary seedling stand Y1 is transferred to the supply seedling stand Y2 and used.
The operator can operate the seedling transplanter 1 alone, supply the seedling N to the seedling supply tool K1, and operate the adjustment lever 45 while accompanying the left accompanying space G. When there is a work assistant, seedling supply work is also performed in the right accompanying space G. An operator walking in the left accompanying space G can also adjust the adjustment lever 45 while visually recognizing the actual appearance of the seedling N after planting.

The steering handle H is provided with a traveling clutch lever portion 124, a planting clutch lever portion 125, a transmission lever portion 126, and the like. The traveling clutch lever portion 124 is disposed on the left side of the steering handle H and the adjustment lever 45. As with the adjustment lever 45, it is arranged at a position where an operator walking in the left accompanying space G can operate.
A front stand 127 and a rear stand 128 that are lifted and held for long-time stoppage and maintenance are provided at the front and rear lower portions of the mobile machine body T so as to freely advance and retract.

2, 3, 6, 7, and 15 to 24, an enlarged hole digging mechanism 130 that forms an enlarged hole W <b> 2 behind the grounding body 43 is disposed immediately before the seedling planting tool U <b> 1. The enlarged hole digging mechanism 130 is located below the first link 26, the planting rocking body 27, and the second link 28 of the seedling planting device U.
The enlarged hole digging mechanism 130 includes a flange member 131 for digging the enlarged hole W2, a support rod 132 attached to the rear portion of the flange member 131 and pivotally supported by the mobile machine body T, and the support rod 132 positioned upward. And an actuating member 134 that moves downward by the rotation of the planting drive shaft 30 and lowers the support rod 132.

  The flange member 131 is formed of a plate material, has a V-shape that is inclined rearward from the center to the left and right sides in plan view, and has an arc shape in which the lower edge 131a is an upward arc from the center to the left and right sides. The top surface of R is plunged from before the position where the seedling planting hole W1 is to be formed and becomes deepest at the position where the seedling planting is to be formed. A large and wrinkle-shaped enlarged hole W2 that forms the bottom at the planned formation position of the seedling planting hole W1 is formed.

As shown in FIGS. 19, 20, 22, and 23, the eaves member 131 assumes a rearward tilting posture from the beginning to the end of digging the enlarged hole W <b> 2, and ascends and waits as shown in FIGS. 17 and 21. When leaning, it will be tilted forward.
The support rod 132 is bent upward so that the midway portion in the front-rear direction avoids interference with the grounding body 43 and approaches the planting drive shaft 30, and the support plate 132 a and the bar material 132 b are disposed in the middle of the support rod 132. The guide pin 132c is fixed. A cylindrical shaft 132d is provided at the left and right front ends of the support rod 132, and the cylindrical shaft 132d is rotatably supported on the support shaft 107 of the support frame 105 via a bearing.

The lower end of the tension spring 133a of the urging member 133 is hooked to the bar 132b of the support rod 132, and the upper end of the tension spring 133a is connected to the adjustment rod 133b provided on the main frame 8, and the vertical position adjustment of the adjustment rod 133b is performed. Thus, the urging force for lifting the support rod 132 is adjusted.
17, 18, 21, and 24, the planting drive shaft 30 supports a link shaft 85c via a rotating arm 29 (arm 85b) on a short shaft 85a to which rotational power is transmitted. A base portion of the swing arm 135 is pivotally supported at 85 c, and an operating member 134 is pivotally supported at the tip of the swing arm 135. The rotation of the short shaft 85a causes the link shaft 85c to revolve with a circular locus J through the arm 85b.

  As shown in FIG. 24, the actuating member 134 has a shape in which a four-leg plate is fixed to a cylindrical boss member, and the boss member is connected to a swing arm 135 via a swing shaft 137. The nut member 138 is fixed to the upper leg portion of FIG. 17 and the adjusting screw 139 is screwed to the nut member 138 to form the restricting portion 134a, and the small shaft 140 is fixed to the leg portion located on the upper front side. Then, the roller 141 is fitted to form the push-down portion 134b, and the swing guide portion 134c is formed on the rear upper side by providing a long hole 142 that fits the guide pin 132c in the leg portion located on the lower front side. The stopper part 134d is formed in the leg part located.

The push-down portion 134b of the actuating member 134 allows the roller 141 to come into contact with the abutting plate 132a, and the push-down portion 134b moves downward to push down the front and rear intermediate portions of the support rod 132.
When the actuating member 134 rotates about the shaft 137, the restricting portion 134 a of the actuating member 134 can regulate the upward rotation with the tip of the adjusting screw 139 coming into contact with the base of the swing arm 135. By advancing and retracting 139, the timing of contact with the base of the swing arm 135 is changed, the angle of the push-down portion 134b with respect to the swing arm 135 is changed, and the timing of lowering the support rod 132 by the operating member 134 is changed.

That is, the adjusting screw 139 of the restricting portion 134 a constitutes a timing adjusting unit 136 that adjusts the timing of lowering the eave member 131 via the support eave 132.
The long hole 142 of the swing guide part 134c is fitted to the guide pin 132c, and the support rod 132 is always urged upward by the urging member 133, so that the guide pin 132c is at the upper end of the long hole 142. At one time, an upward biasing force is applied to the actuating member 134, biasing the restricting portion 134a in a direction in contact with the base portion of the swing arm 135, and the guide pin 132c is moved downward through the long hole 142. Allowed.

The stopper portion 134d can be brought into contact with the base of the swing arm 135 and restricts the operation member 134 from rotating around the swing shaft 137 by a predetermined angle or more in the counterclockwise direction in FIG.
When the restricting portion 134a is restricted from turning upward (clockwise turning in FIG. 24) by the urging force from the support rod 132 and is in contact with the base of the swing arm 135, the actuating member 134 is moved to the swing arm 135. As a result, the operating member 134 is rotated around the short shaft 85a while being pushed down by the rotating arm 29, and the link member 85c rotates downward (counterclockwise in FIG. 24). The roller 141 of the push-down portion 134b comes into contact with the contact plate 132a of the support rod 132 by this rotation, and the support rod 132 is lowered.

  When the link shaft 85c and the swinging shaft 137 are linearly arranged below the short shaft 85a, that is, when the rotating arm 29 and the swinging arm 135 are linear, it is when the saddle member 131 is lowered most. When the link shaft 85c revolves beyond that state, the swing arm 135 is rotated in the opposite direction by the urging force from the support rod 132, and the actuating member 134 of the operating member 134 once leaves the base of the swing arm 135. . At this time, the stopper 134 is brought into contact with the base of the swing arm 135 to restrict the counterclockwise rotation of the actuating member 134 around the swing shaft 137 (state shown in FIG. 23D described later).

Further, when the link shaft 85c revolves and moves upward, the restricting portion 134a comes into contact with the base of the swing arm 135 again, and the operating member 134 moves upward with the upward movement of the link shaft 85c.
17 and 21 show a state in which the seedling planting tool U1 and the heel member 131 are substantially at the top dead center, FIG. 19 shows a time when the seedling planting operation of the seedling planting apparatus U is started, and FIG. 20 shows a seedling planting apparatus. FIG. 22 (A) to (C) show the first half of the digging operation of the enlarged digging mechanism 130, and FIG. 23 (D) to FIG.
(F) shows the second half of the digging operation of the enlarged digging mechanism 130.

17 and 21, the rotation of the short shaft 85a causes the link shaft 85c to revolve while drawing a circular locus J centered on the short shaft 85a, and the second link 28 is moved up and down while moving back and forth. It moves up and down so as to draw a locus L on U1, and in conjunction with the movement of the lower half of the locus L of the seedling planting tool U1, the reed member 131 is moved up and down by the revolution of the link shaft 85c.
19, FIG. 22 (A) and FIG. 24, the pivot arm 29 has a center line Q in a substantially horizontal posture (crank angle 1 °), and the tip of the seedling planting tool U1 is at the substantially vertical center of the locus L. Positioned, the eaves member 131 starts to bite into the eaves R and starts to form the enlarged hole W2.

At this time, the swing arm 135 hangs down from the link shaft 85c, and the restricting portion 134a of the actuating member 134 is restricted from turning upward by the tip of the adjusting screw 139 coming into contact with the base of the swing arm 135. The roller 141 comes into contact with the contact plate 132a of the support rod 132, and an operation of pushing down the support rod 132 is started.
In FIG. 22 (B), when the short shaft 85a rotates and the pivot arm 29 has the center line Q in the forward and downward posture (crank angle 30 °), the rod member 131 gradually bites into the rod R. At the same time, From the upper surface of the enlarged hole W2 formed by the flange member 131, the tip of the flange member 98 bites into the flange R. When the crank angle reaches 60 ° in FIG. 22 (C), the rod member 131 further bites into the flange R. The formation of the seedling planting hole W1 by the heel member 98 is rapidly performed.

When the rotation of the short shaft 85a further proceeds from the above state and the link shaft 85c moves almost directly below the short shaft 85a, the discharge means 95 starts to operate, and the heel member 98 of the seedling planting tool U1 is released. At the same time as forming the seedling planting hole W1, the stored seedling N is dropped and planted.
When the link shaft 85c moves almost directly below the short shaft 85a, the hook member 98 is opened most widely, and when the pivot arm 29 and the swing arm 135 are linear, the hook member When 131 is lowered most, the lowest bottom of the bowl-shaped enlarged hole W2 is formed at the formation planned position of the seedling planting hole W1.

When the swing arm 135 passes through the linear state with the rotating arm 29, the swinging arm 135 rotates around the link shaft 85c because the elongated hole 142 of the actuating member 134 is linked to the guide pin 132c. The actuating member 134 is in a state shown in FIG. 23D that rotates counterclockwise until the stopper portion 134 contacts the base of the swing arm 135.
In the state of the crank angle of 93 ° in FIG. 23D, the eaves member 98 is opened most greatly, but the support eaves 132 are pulled up by the urging member 133, and the operation members 134 are raised by the elevating of the support eaves 132. Has moved.

  When the rotating arm 29 is further rotated by the short shaft 85a, the swing arm 135 is pulled rearward and upward, the operating member 134 is rotated in cooperation with the guide pin 132c, and the restricting portion 134a is rotated by the swing arm. Although it abuts on the base portion of 135, the upper movement of the support rod 132 is allowed, and the biting of the rod member 131 into the rod R gradually becomes shallower, resulting in a state indicated by a crank angle 142 ° in FIG.

20 and FIG. 23F, when the crank angle is 180 °, the heel member 98 comes out of the seedling planting hole W1 and starts the closing operation, and the heel member 131 also comes out of the heel R upward. Go.
The enlarged hole W2 is larger and shallower than the seedling planting hole W1, overlaps with the seedling planting hole W1, and is deepest at the seedling planting hole W1 in a side view, In front view, the arc shape of the lower edge 131a of the heel member 131 is deepest at the seedling planting hole W1, and the irrigation that has entered the enlarged hole W2 enters the deepest seedling planting hole W1. It gathers and is effectively supplied to the seedling N.

  Even if the ridge member 98 of the seedling planting tool U1 enters the ridge R from the beginning when the ridge member 131 starts digging the enlarged hole W2, its tip has a pointed shape so that the resistance is small, and the enlarged hole W2 is broken. There is nothing. Since the enlarged hole W2 is formed in advance, the succeeding seedling planting tool U1 can pierce the heel member 98 deeply with a smaller resistance than in the case without the enlarged hole W2, thereby forming a deep seedling planting hole W1. And seedlings N can be planted deeply.

The transplanting operation by the seedling transplanter 1 will be described.
While moving the seedling transplanter 1 along the heel R, the worker walks along the traveling space G behind the left rear wheel 2 as the mobile machine body T advances, and the seedling tray placed on the seedling stand Y The pot seedling N is replenished to each seedling supply tool K1. In the case of one-person work, the seedlings N are continuously introduced into the respective seedling supply tools K1, and in the case of two-person work, each person is charged into every other seedling supply tool K1.

  The power branched from the traveling drive system of the transmission case M transmits power from the planting drive shaft 30 to the planting drive mechanism U2 of the seedling planting device U, so that the seedling planting tool U1 has a substantially elliptical shape that is long vertically. Periodically moving up and down while drawing the locus L, moving the ridge member 13 of the enlarged hole digging mechanism 130 up and down in conjunction with the up and down movement of the seedling planting tool U1, and transmitted to the planting drive mechanism U2. Power is branched from the planting drive shaft 30 and transmitted to the supply drive mechanism K2 of the seedling supply device K, and the turntable S is intermittently driven.

In the supply drive mechanism K 2, the supply interlocking member 17 moves back and forth by the rotation of the planting drive shaft 30 (short shaft 85 a), and the engagement rotating body 12 is moved to the horizontal axis 14 via the intermittent rocking body 16 and the engagement claw 18. The turntable S that rotates intermittently around the engagement rotary body 12 is intermittently driven around the vertical axis 10.
Due to the intermittent rotation of the turntable S, many seedling supply tools K1 move intermittently on the circular orbit. In the seedling planting tool U1, the shutter 35 is closed by the middle closing part 36b of the shutter closing member 36, the seedling N is supplied thereon, and before the seedling planting tool U1 reaches the seedling supply position P, the shutter is closed. The shutter 35 is slightly moved downward by the minutely moving part 36a of the member 36, and the stored seedling N is slightly moved downward. When the seedling planting tool U1 reaches the seedling supply position P, the shutter 35 is fully moved. It is opened and the seedling N is dropped and supplied to the seedling planting tool U1 that has come to the top dead center just below the seedling supply position P.

  The seedling planting tool U1 of the seedling planting device U receives the seedling N supplied from the seedling supply tool K1 near the top dead center, moves downward along with the movement of the mobile machine body T, and pierces the heel R until reaching the bottom dead center. While opening and forming the seedling planting hole W1, the seedling N stored in the inside is discharged to the heel R and closed while moving upward. The vertical movement and the opening / closing operation are periodically performed in synchronization with the intermittent rotation of the turntable S, and the seedlings N are planted on the heel R at regular intervals.

When it is desired to adjust the penetration depth of the seedling planting tool U1 with respect to the upper surface of the heel R, that is, the planting depth, an operator in the left wake space G moves the adjustment lever 45 of the planting depth adjusting mechanism 44 back and forth. It swings and the set height of the grounding body 43 is changed.
Prior to the seedling planting hole W1 of the seedling planting tool U1 of the seedling planting tool U1, the maximum depth is reached at a position where the collar member 131 gradually becomes deep while piercing the heel R and the seedling planting hole W1 is to be formed. When the heel member 98 is separated from the seedling planting hole W1, the heel member 131 is also moved upward to reach the standby position.

FIG. 25 shows a modification of the enlarged hole digging mechanism 130.
The enlarged hole digging mechanism 130 has upper limit setting means 145 for setting an upper limit of the lifting of the scissors member 131 between the mobile machine body T and the support scissors 132, and scissor escape means for letting the scissors member 131 upward from the support scissors 132 themselves. 150 is provided.
In the upper limit setting means 145, a bracket 146 is fixed in a forward protruding manner to a cylindrical shaft 132d at the front end of a support rod 132 pivotally supported on a support shaft 107 via a bearing, and an adjustment screw 147 is screwed to the tip of the bracket 146. The axial position of the adjusting screw 147 can be adjusted freely, and the head of the adjusting screw 147 can come into contact with a mounting body 73 provided on the transmission case M.

When the support rod 132 is pulled up by the urging member 133 and the lower edge 131a of the flange member 131 is slightly above the upper surface of the flange R, the head of the adjustment screw 147 contacts the mounting body 73, The rise of the support rod 132 and the rod member 131 is restricted.
When the lifting of the scissors member 131 is restricted and the mobile body T moves forward in a state where the lower edge 131a is close to the top surface of the scissors R, the scissors member 131 scrapes off the soil on the top surface of the scissors R. The member 131 eliminates the upper part of the earth and mountain that has been pushed and moved from the ridge R to form the enlarged hole W2, and prevents the topsoil from being largely accumulated on the front side of the enlarged hole W2.

When a large film is formed on the front side of the enlarged hole W2 when the multi-film is put on the ridge R, the multi-film becomes buoyant and the greenhouse effect of the enlarged hole W2 and the seedling planting hole W1 is reduced. The multi-film can be properly covered by cutting the soil pile on the front side of the enlarged hole W2.
The pressing of the hook member 131 by the actuating member 134 is started from a position where the lower edge 131a is close to the upper surface of the hook R.

The upper limit setting means 145 projects an adjustment screw downward from the adjustment rod 133b to which the biasing member 133 is attached or the main frame 8 to which the biasing member 133 is attached, so that the head of the adjustment screw comes into contact with the support rod 132. You may comprise.
In the saddle escape means 150, a support rod 132 is formed by a front support rod 132F and a rear support rod 132R, and a metal fitting 151 is fixed to the rear end of the front support rod 132F. A tension spring 153 that pivotally supports the upper end of the rear support rod 132R and biases the rear support rod 132R forward is provided between the front support rod 132F and the rear support rod 132R.

The metal fitting 151 has a guide pin 132c fixed to the outer surface, and supports the upper end of the rear support rod 132R so that it can swing back and forth. The rear support rod 132R is brought into contact with the front portion of the metal fitting 151 by a tension spring 153. They are in contact with each other and are allowed to swing backward.
The front support rod 132F and the rear support rod 132R are integrally pushed down when being pushed down by the actuating member 134, and when the normal expansion hole W2 is formed, the rear support rod 132R is attached to the bracket 151 by the tension spring 153. Although it is in contact with the front portion, when a large resistance is applied to the hook member 131 by a stone or the like in the hook R, the rear support hook 132R swings backward against the tension spring 153, and the escape locus V indicates In addition, the flange member 131 elastically escapes rearward and upward about the rotation shaft 152.

When the flange member 131 escapes rearward and upward, the support rod 132, the actuating member 134, the upper limit setting means 145 and the like are not overloaded and can be prevented from being damaged.
The scissor escape means 150 may be configured by fixing a rear support rod made of a spring plate to the rear end of the front support rod 132F and attaching a hook member 131 to the lower portion of the rear support rod made of spring plate.
In the present invention, the shape of each member and the positional relationship between the front, rear, left, and right in the embodiment are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.

  For example, the timing adjusting unit 136 uses the push-down portion 134b of the actuating member 134 as an eccentric shaft capable of rotating the small shaft 140, or attaches the small shaft 140 to the actuating member 134 so that the position of the actuating member 134 is adjustable. The amount of protrusion of the roller 141 from the position may be adjustable, and the lowering timing of the support rod 132 by the operating member 134 may be adjusted.

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 8 Main frame 30 Planting drive shaft 85a Short shaft 85b Arm 130 Enlarged hole digging mechanism 131 Scissors member 132 Support rod 132a Baffle plate 133 Energizing member 134 Actuating member 134a Restriction part 134b Push-down part 134c Oscillation guide part 135 Swing arm 136 Timing adjustment means J Circular locus K Seedling supply device K1 Seedling supply tool N Seedling R Ｔ T Mobile machine U Seedling planting device U1 Seedling planting tool W1 Seedling planting hole W2 Expansion hole

Claims (7)

A mobile body (T) that can move across the heel (R), and a heel (R) that is provided on the mobile body (T) and moves up and down periodically by the rotation of the planting drive shaft (30). A seedling planting device (U) having a seedling planting tool (U1) for planting a seedling (N) while forming a seedling planting hole (W1) by rushing into and above the seedling planting device (U) And a seedling feeding device (K) for supplying the seedling (N) to the seedling planting tool (U1) in the ascending position, the seedling planting tool (U1) of the seedling planting device (U) An expansion hole digging mechanism (130) for forming an expansion hole (W2) shallower and larger than the seedling planting hole (W1) from the front to the front of the position where the seedling planting hole (W1) is to be formed is provided in front. ,
The expansion hole digging mechanism (130) moves up and down in conjunction with the vertical movement of the seedling planting tool (U1), thereby forming a bowl-shaped expansion hole that becomes the bottom at the planned formation position of the seedling planting hole (W1). A seedling transplanter having a heel member (131) forming (W2).   The enlarged hole digging mechanism (130) is pivotally supported by the mobile body (T) and has a support rod (132) to which the rod member (131) is attached, and an energizing force for biasing the support rod (132) upward. The seedling according to claim 1, comprising a biasing member (133) and an actuating member (134) for lowering the support rod (132) by rotating the planting drive shaft (30). Transplanter.   The seedling transplanter according to claim 2, wherein the actuating member (134) is provided with a timing adjusting means (136) for adjusting the timing of lowering the support rod (132) by the actuating member (134). .   An upper limit setting means (145) for setting an upper limit for raising the support rod (132) by the biasing member (133) is provided between the mobile body (T) and the support rod (132). The seedling transplanter according to claim 2 or 3.   The said support rod (132) is provided with the rod escape means (150) which escapes the rod member (131) rearward and upward when a large resistance is added to the rod member (131). The seedling transplanter according to any one of 4 above. The planting drive shaft (30) supports a link shaft (85c) via an arm (85b) on a short shaft (85a) to which rotational power is transmitted, and a swing arm (85c) is supported on the link shaft (85c). 135) is pivotally supported, and the actuating member (134) is pivotally supported at the tip of the swing arm (135).
The actuating member (134) is in contact with the base of the swing arm (135) and restricts upward rotation, and the planting drive shaft (30) rotates and restricts (134a). Is pushed down by engaging with the support rod (132), and a push-down portion (134b) that rotates downward while being in contact with the base of the swing arm (135) and is brought into contact with the support rod (132) and lowered. The seedling transplanter according to any one of claims 2 to 5, further comprising a swing guide portion (134c) that receives a swing force in a direction in which the portion (134b) is separated from the support rod (132).   The seedling planting device (U) is pivoted by a pair of first links (26) pivotally supported by the mobile body (T) and a planting rocker (27) provided on the first links (26). A pair of second links (28) that are supported and support the seedling planting tool (U1) at their tips, a rotating arm (29) connected to one of the pair of second links (28), and this rotation And a planting drive shaft (30) for rotationally driving the arm (29). The enlarged hole digging mechanism (130) includes a first link (26), a planting rocking body (27), and a second link ( The seedling transplanting machine according to any one of claims 1 to 6, wherein the seedling transplanting machine is located below (28).

Images