JP3305908B2 - Method and apparatus for removing and supplying seedling of transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing and supplying seedlings of a transplanter, and is used for transplanting vegetables such as cabbage and lettuce.

[0002]

2. Description of the Related Art Vegetable transplanters for raising seedlings in seedling trays having pot portions in an array of vertical and horizontal lattices, and removing and transplanting seedling soil (sedimentary seedlings) from the pot portions are known. Is being mechanized. In this vegetable transplanter, it is important to take the seedling soil from the pot portion, and various takeout techniques have been proposed because of the strength of the roots in taking out the seedling.

One of the methods is to use a drain hole formed at the bottom of the pot portion to push an extruding tool into the hole, thereby extruding seedling soil from an opening of the pot portion (1 of the conventional example). . Further, there is another one in which seedlings are taken out from an opening in a pot portion by inserting and removing a seedling removal claw into and from a seedling soil through an opening in a pot portion (second conventional example). Further, as another one, a technique in which the conventional example 1 and the conventional example 2 are combined has been proposed (see Japanese Patent Application Laid-Open No. 4-330211, and the conventional example 3).

[0004]

One of the conventional examples is that when a group of seedlings in a row is protruded with an extruding tool, the seedlings are inserted into a drainage hole. It was not possible, and the possibility of misalignment was great, especially because the diameter of the drain hole was small. Even if there is no misalignment, the extruder can only use thin rods, and in the case of seedlings with weak roots, the seedlings can be pushed out from the pot simply by sticking the sticks into the seedlings. There was a case that could not be done.

[0005] In the second conventional example, when the seedling removal claw is pierced into the seedling soil in the pot portion, the rushing movement is linear. There was a problem that seedlings were likely to remain in the pot after being pulled out. Conventional example 3 is a cooperative action between the push using the drain hole of the pot portion and the pulling out of the seedling soil, so that it can be understood that the seedling soil can be taken out at first glance. However, it is necessary to synchronize the movement of the push from behind the pot part and the movement of the seedling removal claw from the surface, and if this synchronization goes wrong, it is difficult to take out the seedling soil from the pot part with one of the preceding. Further, since the tuning mechanism is attached, not only is the structure complicated and the cost is increased, but also the adjustment is difficult.

[0006] In addition, a type in which seedlings are taken out by entering and leaving a seedling take-out claw from the opening edge of the pot portion, that is, in the conventional example 2, the claw operating mechanism of the seedling take-out claw is provided by a cam, a link or the like. It is configured to reciprocate the seedling removal claw from the pot portion to the transplanting portion. However, the seedling soil is pierced from the pot portion on the outward stroke toward the pot portion (seedling removal process), and the seedling is returned to the transplanting portion. Since the traveling speed of the process (the seedling transport process) was set to be the same speed, the following problems were encountered.

In other words, if the speed at which the seedlings are pierced by the seedling extraction nails and heads toward the transplanting part is high, the pierced seedlings are accelerated by the inertia force, so that the seedling extraction nails are conveyed during the transportation. On the other hand, if the speed is low, the seedling soil removal time toward the pot portion becomes long, which is disadvantageous in terms of efficiency. Therefore, the present invention is to improve the efficiency of the seedling removal by moving the forward stroke of taking the seedling soil in the reciprocating movement of the seedling removal claw, moving the seedling soil early and returning the seedling soil to the transplanting section at a slower speed. It is an object of the present invention to prevent seedlings from falling during soil transportation and to ensure supply to a transplanting part.

[0008]

According to the present invention, a seedling tray 41 is provided.
Seedlings soil C pot 40 by seedling extraction claw 56 in
The seedlings C that have been taken out and transferred to the transplanting section 37 while being pierced by the seedling take-out claws 56, and are transferred.
Is supplied by falling into the transplant portion 37 ,
The following technical measures have been taken to achieve the above objectives.

That is, the method of the present invention according to claim 1 comprises:
The seedling extraction claw 56 is moved in the forward stroke X toward the pot portion 40.
And piercing the pot portion 40, the seedling C is poured into the pot portion 40.
When the reciprocating motion is performed with the return stroke Y toward the transplanting part 37 after taking out the trajectory from the device, the moving speed of the return stroke Y is made slower than the forward stroke X. According to a second aspect of the present invention, in the method according to the first aspect, the seedling removal claw 56 enters the pot portion 40 in the depth direction at the end portion of the forward stroke X, and the seedling soil C , The seedling C is taken out from the pot portion 40, and the seedling C pierced from the seedling take-out claw 56 having a substantially vertical posture is dropped to the transplanting portion 37 at the terminal portion of the return stroke Y. It is assumed that.

Furthermore, the apparatus of the present invention according to claim 3, and X the seedling taking out pawl 56, forward stroke toward the pot 40, po
After piercing the pot portion 40, the seedling soil C is removed from the pot portion 40.
A claw operating mechanism 42 for reciprocating with the reciprocating stroke Y toward the reciprocating stroke Y toward the reciprocating stroke Y toward the transplant portion 37,
And a driving means M for driving the claw operating mechanism 42 by reducing the moving speed of the claw moving mechanism 42.

According to a fourth aspect of the present invention, there is provided the apparatus according to the third aspect, wherein the driving means M includes a pair of elliptical gears 48 and 49 which are rotated by meshing with each other. It is assumed that. Further, in the apparatus according to the fifth aspect of the present invention, in the apparatus according to the fourth aspect, the toothless portions 150A, 150B, 151A, 15
1B having a pair of transmission gears 150 and 151
It is characterized by being prepared for.

[0012]

The speed at which the seedling soil C taken out of the pot part 40 of the seedling tray 41 in a piercing state is conveyed toward the transplanting part 37 by the movement of the return stroke Y of the seedling removal claw 56 is reduced. Therefore, the stabbed seedling soil C is prevented from dropping from the seedling removal claw 56 during transportation.

When the seedling removal claw 56 comes to the terminal portion of the return stroke Y, the seedling removal claw 56 assumes a substantially vertical posture and faces above the transplanting part 37. Sat C
Is supplied to the transplanting section 37 by dropping. The seedling extraction claw 56 that has supplied the seedling soil C to the transplanting part 37 moves in a substantially vertical posture toward the pot part 40 for the extraction of the seedling soil C (forward stroke X).
Since the moving speed of the forward stroke X moves faster while the returning stroke Y is slowed, the take-out speed is increased and the efficiency is improved.

At the end of the forward stroke X, the seedling removal claw 56
In this case, the seedlings C do not reciprocate and are surely rushed into the seedling soil C of the pot portion 40, thereby reducing unintentional removal.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 11 showing a side view and FIG. 12 showing a plan view of a vegetable transplanter 11 equipped with a seedling removal / supply device 10 according to a first embodiment of the present invention, Numeral 11 denotes a walking type having a steering handle 13 at a rear portion of the running vehicle body 12, and while running in the longitudinal direction across the ridges 14, seeded seedlings C are planted on the ridges 14 at predetermined intervals. I have.

The traveling vehicle body 12 includes a main frame 15, a gantry 16 provided at the front end of the main frame 15, and the like. An engine 17 is mounted on a gantry 16, and the engine 17 is covered with a bonnet 18. A transmission case 19 is fixed to the rear of the gantry 16. It is linked by the body 20.

The power from inside the transmission case 19 is taken out by two systems, a wheel transmission shaft 21 and a PTO shaft 22, and the right and left ends of the wheel transmission shaft 21 swing up and down around the axis. Left and right drive wheels 24 via transmission case 23
, And can immediately respond to the height of the ridge 14, and the driving wheels 24 can be driven by the wrapping transmission body in the transmission case 23. This drive wheel 24 rolls in the groove between the ridges 14.
In addition, a pair of left and right front wheels 25 is provided at a front portion of the traveling vehicle body 12.
A ridge shoulder copying roller 26 is provided.

The main frame 15 of the traveling vehicle body 12 is formed of a square pipe or the like, and its front portion is bent downward.
6 and the rear portion is bent upward to serve as a mounting portion for the steering handle 13. Traveling car body 1
At the rear of 2, a transplant working section 30 is provided. The transplanting operation unit 30 converts the seedling removal / supply device 10 and the soild seedling (seedling soil) C supplied from the seedling removal / supply device 10 into a ridge 1.
4, and is provided on a movable frame 33 that swings up and down around the axis of a power receiving shaft 32 supported on a fixed side of the transmission case 19 and the like. At the rear of the movable frame 33, a pressure reduction roller (or soil covering roller) 34 is provided.

The planting device 31 is supported on a movable frame 33 by a parallel link 36 via a suspension link 35 so as to be swingable in the vertical direction. A beak-shaped planting tube 37 is attached to the tip of the parallel link 36. The planting cylinder 37 is vertically movable by a crank motion of a crank body 38 linked to a middle part of the parallel link 36. The seedling tube 37 is a transplanting part and is open upward, so that the seedling C is dropped from the seedling extraction / supply device 10 disposed above the seedling tube 37. , Parallel link 3
6, when the ridge 14 is pierced into the ridge 14, the lower end is opened to plant the seedling C with soil.

The seedling removal / supply device 10 includes a seedling tray 4 in which a large number of pots 40 in which seedlings C with seedlings are raised are arranged vertically and horizontally.
From No. 1, soil-bearing seedlings C are taken out one by one and dropped into the planting cylinder 37. The seedling tray 41 is made of resin and has flexibility, and a large number of pots 40 arranged vertically and horizontally are provided so as to protrude from the back surface. A draining hole (not shown) is provided at the bottom of the pot 40. Are formed. In each pot portion 40, seedlings C with seedlings are raised, and the pot portion 4
A gap is formed vertically and horizontally between 0 (see FIG. 10).

As shown in FIGS. 1 to 10, the seedling picking / supplying device 10 according to the first embodiment of the present invention has a pot portion 40 of a seedling tray 41 at a predetermined seedling picking position with respect to a planting device 31.
A claw operating mechanism 42 for picking out soiled seedlings C one by one by a seedling take-out claw 56 from
A large number of pots 40 arranged in the vertical and horizontal directions are
Feeding device 43 (transporting means) for transporting the seedling tray 41 in the horizontal and vertical directions so as to be sequentially positioned at the take-out position by the
And

The claw operating mechanism 42 includes a first arm 52, a second arm
The four-link mechanism 57 includes an arm 53, an articulation link 54, and a relay link 55, and the driving means M provided at the base of the first and second arms 52, 53 attaches the claw holder to the articulation link 54. The seedling extraction claw 56, which is rotatably held via 59, is reciprocated by a forward stroke X toward the pot portion 40 and a return stroke Y toward the transplant portion 37. On the way,
It has a figure eight shape that closes substantially at the middle part.

The driving means M is for driving the driving body 45 to rotate counterclockwise in FIGS. 1 to 6, and may be a motor, or may be the rotational power of the PTO shaft 22 described above. . The driving body 45 has a bracket 46 fixedly mounted on a device frame 44 fixed on the movable frame 33, and is fixedly mounted as a pair of left and right driving shafts 47 rotatably supported on the bracket 46.

As shown in FIGS. 1 and 7, an eccentric elliptical gear 48 is fixed to the drive shaft 47, and another eccentric elliptical gear 49 meshes with this gear 48. When driven by the PTO shaft 22 in the direction indicated by the arrow in FIG. 1, the prime mover 45 is rotated counterclockwise through the pair of gears 48 and 49, and the seedling removal claw 56 is moved through the claw operating mechanism 42 in the trajectory X. , Y.

Crankpins 50 and 51 are projected from each of the driving bodies 45 with a circumferential phase shifted by about 180 degrees. The base of the first arm 52 is provided on the first crankpin 50 and the second crankpin is provided on the first crankpin 50. The base of a second arm 53 is rotatably connected to the first arm 5.
The tip of the second arm 53 is rotatably connected to the front side of the articulation link 54 from the pin 52A, and the tip of the second arm 53 is the pin 53A.
The lower part of the relay link 55 is rotatably connected to the apparatus frame 44 via a pin 55A, and the upper part of the relay link 55 is connected to a pin 55B. Is rotatably connected to the rear side of the articulation link.

Here, the claw operating mechanism 42 comprises a four-bar parallel link mechanism 57 composed of first and second arms 52 and 53, an articulated link 54 and a relay link 55, and a counterclockwise The reciprocating movement (reciprocating movement) between the seedling tray 41 and the transplanting part 37 is possible while performing the parallel movement while holding the seedling extraction claw 56 in a substantially vertical posture by the rotation drive (see the arrow in FIG. 1). Have been.

The claw operating mechanism 42 has a cylindrical claw holder 5 on the front side of the articulation link 54 via a rotation holding means 58.
9 is rotatably held, a claw shaft 60 having a seedling removal claw 56 is slidably inserted into the claw holder 59, and a support arm is provided below the claw holder 59 as a downwardly extending shape. 61 is stretched. The lower part of the pushing arm 63 is rotatably connected to the lower part of the supporting arm 61 via a pin 62, and the upper part of the pushing arm 63 is connected to the claw shaft 60 via an engaging means 64 using a long hole and a pin. ing.

The device frame 44 is provided with a claw driving means 65. The claw driving means 65 has a driving arm 65B fixedly mounted on a horizontal driving shaft 65A which is driven to rotate in conjunction with the PTO shaft 22 described above. The lifting arm 65C protruding from the driving arm 65B is positioned behind the pushing arm 63 so as to be able to come into contact with and detach from the driving arm 65B.
The push-out arm 63 is pushed against the return means 66 by the counterclockwise rotation of, and the claw 56 advances (see FIG. 7).

The claw shaft 60 is a round bar as shown in FIG.
In the claw holder 59, the insertion hole of the round bar is a round hole, but the claw shaft 60, that is, the claw shaft 60 and the insertion hole are formed in a square shape to prevent free rotation of the seedling removal claw 56. Can be. The seedling removal claw 56 provided at the tip of the claw shaft 60 is a bifurcated claw, which is provided to be able to advance and retreat with respect to the claw holder 59, and a spring provided at the rear end of the claw holder 59 and the rear end of the claw shaft 60. A return means 66 indicated by a coil spring surrounding the claw shaft 60 with the receiver 66A is urged so as to quickly return in the retreating direction. It is desirable to change the position of the spring receiver 66A with a screw or the like to adjust the elastic force of the coil spring to make the return speed strong or weak.

The support arm 61 of the claw holder 59 is provided with a claw lock means 67. The claw lock means 67 is connected to the support arm 61 by a pin 68 as shown in FIGS. An engaging claw 69 rotatably held by a helical spring, which is urged in the engaging direction around the pin 68 in the engaging direction.
Engaging recess 60A formed at the tip of engaging claw 69 on claw shaft 60
It is supposed to be detachable.

That is, when the seedling removal claw 56 is positioned at the entry start position shown in FIG. 1, the jumping-up arm 65C of the claw driving means 65 pushes the pushing arm 63 against the return means 66. The seedling removal claw 56 rushes into the seedling soil C,
At the end of the rush, the engaging claw 69 is engaged with the engaging recess 60A formed in the claw shaft 60 by the urging body 70 to lock the seedling removal claw 56.

The apparatus frame 44 in the vicinity of the claw driving means 65 is provided with a stopper shown by a bar, that is, a claw guide means 71. When the claw holder 59 comes into contact with the claw guide means 71 in a substantially vertical posture. The tip of the seedling removal claw 56 enters the rush start position such that the tip of the seedling removal claw 56 scoops the leaf C1 of the seedling soil C from below with the rotation holding means 58 as a center.

A stopper 72 is also provided on the rear side of the device frame 44. When the claw holder 59 having a substantially vertical posture, which has been retracted by the parallel movement, comes into contact with the stopper 72 near the end of seedling supply, the stopper 72 is rotated. Seedling removal claw 5 centering on holding means 58
6 is restricted by the parallel movement of the claw operating mechanism 42 and accelerated downwardly (including inertia force) to the transplanting portion 37, and the engaging claw 69 comes into contact with the releasing means 73. The engaging claw 69 is disengaged from the engaging concave portion 60A of the claw shaft 60 against the force body 70, and the seedling removal claw 56 is retracted through the claw shaft 60 by the return means 66. Seedling soil C is allowed to fall (see FIG. 5).

At the seedling falling position, the rod-shaped pusher 74 is projected from the nail holder 59, and the seedling take-out claw 56 is inserted through the spectacles 74A of the pusher 74, whereby
When the claw 56 retreats, it is desirable to ensure that the seedling C falls from the claw 56 by pressing the seedling C against the eyeglass portion 74A. When the reciprocating motion is performed after the claw holder 59 contacts the front and rear stoppers 71 and 72, the rotation holding means 58 rotates the claw holder 59 and the stopper 7
In the first embodiment shown in FIG. 7, a friction support is provided on a pivot shaft 58A protruding from the claw holder 59 so as not to rotate during the reciprocating movement between the first and second members 72. Insert the boss 58B into the insertion hole 58C of the link 54.
The figure shows the one fitted to.

1 to 6, the trail of the tip of the seedling removal claw 56 is shown as an inverted figure 8 in a reciprocating parallel movement of the claw operating mechanism 42, so that the seedling C is removed in the forward stroke. In the case of X, when the claw holder 59 in a substantially vertical position comes into contact with the stopper 71, the seedling removal claw 56 rushes into one side near the opening edge of the pot portion 40 so as to scoop the leaf C <b> 1 around the rotation holding means 58. On the way to the start position, while taking out the seedling soil C from the pot part 40 and transporting it to the transplanting part 37, the saplings of the leaves C1 are prevented by the seedling extraction claws 56 as shown in FIG. The reciprocation process Y, whose trajectory is changed when the claw holder 59 having a substantially vertical posture abuts on the stopper 72 at the transport end portion, crosses at the center of the reciprocation process.

Here, the tip trajectories X and Y of the seedling removal claw 56 are
A pair of elliptical gears 48 in a driving unit M that rotates the driving body 45 in a counterclockwise direction while closing during the reciprocation of the forward stroke X toward the pot portion 40 and the return stroke toward the transplant portion 37. , 49, the moving speed of the return stroke Y becomes slower than that of the forward stroke X.

Referring to FIG. 8 to FIG.
3, a seedling feeding device 43 includes a transport frame 75 for guiding and supporting the seedling tray 41 so as to be able to be fed vertically, and a base for supporting the transport frame 75 so as to be able to reciprocate in the horizontal direction (left and right direction). And a frame 76. A support plate 76 that supports the bottom of the seedling tray 41 is attached to the transport frame 75 in a forward and downward inclined shape. At the center in the left-right direction of the support plate 76,
As shown in FIG. 10, the guide wall portion 76 that engages with the gap between the pot portions 40 and regulates the lateral movement of the seedling tray 41.
A is bent.

The support plate 76 extends to the pot portion 40 at a position where the seedlings C are taken out by the seedling take-out claw 56 provided in the claw operating mechanism 42. In order to prevent the seedling tray 41 from bending when the seedling extraction nail 56 pierces the soild seedling C, the pot portion 40 at the seedling extraction position is prevented.
Is a supporting member 77 that supports the bottom portion of the first member. This support member 77 is provided with all the pot portions 4 in a row in a row at the seedling removal position.
Preferably, it supports the bottom of the zero. Further, it is not necessary to provide the support plate 76 integrally, and the support plate 76
The support members 77 can be individually attached to the transport frame 75 so as to extend to a position just before the pot portion 40 at the seedling removal position.
Further, the support member 77 is not limited to a plate-like member, and may be a rod-like member, a spherical member, or the like.

A horizontal shaft 78 is rotatably mounted on the transfer frame 75 via a bearing 78A.
A pair of left and right vertical feed wheels 79 are integrally provided on the pair 8. At the inner surface side of the wheel 79, a transport pin 80 that engages with the gap between the pot portions 40 of the seedling tray 41 is detachably attached at an appropriate position in the circumferential direction. The transport pins 80 are selectively mounted in a plurality of mounting holes (not shown) provided in the vertical feed wheel 79, and are mounted at positions corresponding to the pitch between the pot portions 40 of the seedling trays 41. Can be changed.

A drive arm 82 is provided at an end of the horizontal shaft 78 via a one-way clutch 81 (or a ratchet mechanism). The drive arm 82 reciprocates within a predetermined swing angle range. The wheel 79 rotates only in one direction (the direction in which the seedling tray is sent downward). The swing angle of the drive arm 82 is regulated by a regulating member 83 which is attached and fixed to the transport frame 75 so as to be swingable. That is, the regulating member 83 is formed with a notch 84 extending in the circumferential direction corresponding to the swing range of the drive arm 82,
The notch 85 reciprocates once in the notch 84 so that the seedling tray 41 can be transported in the vertical direction by one pitch of the pot 40. This regulating member 83 is
It is urged in a return direction (indicated by an arrow B in FIG. 10) by a coil spring 86 fitted on the horizontal shaft 78.

The wheel 79 is provided with first positioning recesses 87 at a central angle corresponding to one pitch of the pot portion 40 in the circumferential direction. A detent mechanism 88 is provided on the regulating member 83 to position the wheel 79. Note that two fixing holes 89 are formed in the regulating member 83, and one of the fixing holes 89 is selected and fixed to the transport frame 75 by the bolt 90. The notch 84 is formed in a stepped shape so that the movement range of the pin 85 is increased in a posture in which the regulating member 83 is swung as shown by a two-dot chain line in FIG. 41 pots 4
The swing angle of the drive arm 82 can be adjusted in accordance with the zero pitch. Further, a second positioning concave portion 91 is provided on the inner peripheral side of the first positioning concave portion 87 at a central angle different from the central angle in the circumferential direction, and is regulated to adjust the swing angle of the drive arm 82. When the posture of the member 83 is changed, the detent mechanism 88 automatically engages with the positioning concave portion (87 or 91) provided at the center angle corresponding to the pitch between the pot portions 40.

The transport frame 75 is provided with a guide member 92 for guiding and supporting the side edge of the seedling tray 41 so as to bend the seedling tray 41 along the wheel 79 in the vertical direction. On the other hand, the base frame 76 is attached to the movable frame 33, and a transverse feed shaft 94 having a traverse groove 93 is attached to the base frame 76 so as to be rotatable. The rotating power of the driving body 45 of the claw operating mechanism 42 is
The power is transmitted via a winding transmission 95, a driving gear 96, a driven gear 97, and the like. The driving gear 96 and the driven gear 9
7 is provided in a gear box 98 that is detachably attached to the base frame 76, and is provided in the gear box 98.
By changing the rotation speed ratio between the prime mover 45 and the lateral feed shaft 94 by exchanging the nut, the lateral feed amount of the seedling tray 41 can be synchronized with the operation of the claw operating mechanism 42 according to the pitch between the pot portions 40. It has become.

A slider 100 having an engaging pin 99 for engaging with the traverse groove 93 is externally fitted to the transverse feed shaft 94.
The horizontal feed mechanism is configured to reciprocate the transport frame 75 in the left-right direction via the slider 100 when the horizontal feed shaft 94 is rotationally driven. A bellows-shaped cover 102 is provided between the slider 100 and the base frame 76 so as to be freely expandable and contractable in the axial direction, thereby preventing sand or the like from entering the traverse groove 93.

The left and right ends of the horizontal feed shaft 94 are provided with crank arms 103, and the transfer frame 75 is provided with a transmission link 104A rotatable about the horizontal shaft 104. The transmission link 104A includes an engagement portion 105 that engages with the crank arm 103 when the transport frame 75 moves to the leftmost end or the rightmost end.
And the drive arm 82 are connected by a connection link 107, and the transmission link 10 is
When the arm 4 is swung, the driving arm 82 is reciprocated once. Thus, a vertical transport mechanism is configured in which the seedling tray 41 is transported vertically by one pitch when the removal of the soil seedlings C from the horizontal row of pot portions 40 is completed. The transmission link 103 swung by the crank arm 103 is returned together with the regulating member 88 by a coil spring 86 that returns the regulating member 83.

FIGS. 13 and 14 show a second embodiment of the rotation holding means 58. FIG. In the second embodiment, the articulated links 54 are paired on the left and right, and the pivot shafts 58A project from the claw holder 59 on both left and right sides and are rotatably held on the articulated links 54, respectively. Are respectively fitted with vine winding springs 120, and the vine winding springs 12
0 is engaged with the claw holder 59 before and after the pivot shaft 58A, and the other end is engaged with each of the articulation links 54, so that the pair of left and right vine winding springs 120 maintain the balance. Since other configurations are common to the first embodiment described above, common portions are denoted by common reference numerals.

As the rotation holding means 58, a washer, a disc spring, or the like is fitted over the pivot shaft 58A of the second embodiment, and the disc spring is adjusted in elasticity with a bolt and nut. It is also possible to use a structure in which the claw holder is held by applying a resistance and the claw holder can be turned against the resistance. 1 and the like, a screw rod having a lock nut is screwed into a bracket so that the position can be adjusted.
Can also be used.

Referring to FIG. 15, a second embodiment of the driving means M of the pawl operating mechanism 42 is illustrated. In FIG. 15, a pair of prime movers 45 are gears, and each of the gear type prime movers 45 has a toothless portion 150A,
Transmission gear 150 having a gear 150B and toothless portions 151A, 1
A transmission gear 151 having a gear 51B is meshed with the pair of transmission gears 150, 151, which are driven by a motor, a PTO shaft 22, and the like.
9 is driven to rotate as a relay.

Here, in the second embodiment, the moving speed of the seedling extraction claw 56 in the return stroke Y is slower than that in the forward stroke X by the pair of elliptical gears 48 and 49 via the claw operating mechanism 42. The end portion of the forward stroke X (see FIG. 1 when the seedling removal claw 56 has entered the rush start position by scooping up the leaf C1 with the stopper 71), and the end portion of the return stroke Y (seeding the seedling with the stopper 72). (See FIG. 5 when the seedlings C are dropped onto the transplanting part 37 when the claws 56 are in a substantially vertical posture.)
, The transmission gears 150, 1
51 missing tooth portions 150A, 150B, 151A, 151B
Becomes non-meshing with the gear type driving body 45, and the reciprocating operation by the claw operating mechanism 42 is temporarily stopped.
When the seedling C is pierced, the positional deviation is prevented, and when the seedling C falls into the transplanting part 37, the falling deviation is eliminated.

Next, with reference to the above-described first embodiment, the operation of taking out the seedlings C and supplying the seedlings C to the transplanting section 37 will be schematically described. When the seedling removal claw 56 provided on the claw holder 59 so as to be able to advance and retreat is moved toward the pot portion 40 on the seedling feeder 43 by the movement of the claw operating mechanism 42 (forward stroke X), the claw holder 59 having a substantially vertical posture is moved to the claw. By contacting the guide means 71, the claw holder 59, which is rotatably mounted on the claw operation mechanism 42, is rotated about the rotation holding means 58, which is its pivot, as a fulcrum. Thus, the seedling removal claw 56 is advanced to the entry start position, which is one side near the opening edge of the pot portion 40, so as to scoop the leaf C1 in the seedling soil C (see FIG. 1).

When the seedling removal claw 56 comes to the entry start position, the claw driving means 65 is operated and the push-out arm 63 is jumped up, so that the seedling removal claw 56 guides the claw holder 59 against the return means 66. From the entry start position toward the depth of the pot portion 40 to move to the seedling C of the pot portion 40.
(See FIG. 2). Subsequently, the claw operating mechanism 42
3, the seedling extraction claw 56 retreats toward the other side near the opening edge of the pot portion 40 along a substantially V-shaped trajectory as shown in FIG. The seedlings with weak tension are pierced into the seedlings C in a wedge shape, and the seedlings C are reliably taken out from the pot part 40 and supplied in a substantially parallel motion toward the transplanting part 37 (see FIGS. 4 and 5).

At the time of feeding (return stroke) by the substantially parallel movement of the claw operating mechanism 42, the driving means M moves the return stroke Y faster than the moving speed of the forward stroke X due to the engagement of the pair of elliptical gears 48 and 49. By being slowed down,
This prevents the seedling soil C being transported from falling out of the seedling removal claw 56 unexpectedly. In addition, the leaf C1 of the seedling soil C is prevented from dropping by the seedling removal claw 56 during transportation (see FIG. 4), and the claw holder 59 comes into contact with the stopper 72 immediately before the end of the supply process. The seedling removal claw 56 receives the acceleration by the rotation of the claw holder 59 around the rotation holding means 58, and changes its posture to a substantially vertical posture,
The seedling soil C is made to face above the transplanting part 37 (see FIG. 5).

Further, the claw lock means 69 comes into contact with the release means 73 almost immediately when the posture is changed via the claw holder 59 immediately before the end of the supply process, so that the claw lock means 6
7 is released, the seedling removal claw 56 is withdrawn by the return means 66 using the claw holder 59 as a guide, and the seedling soil C that has been removed and conveyed is transferred to the transplanting section 37, and the claw operating mechanism 42 is provided.
The seedling extraction claw 56 moves in a parallel state while maintaining the vertical posture, and the claw guide means 71 as a stopper causes the claw holder 5 to move.
9 come into contact with each other (see FIG. 6), advance again to scoop the leaf C1, and repeat this reciprocating operation.

In the present invention described in detail above, the following design changes can be made. In FIG. 11, the seedling feeding device 43 is inclined forward and inclined, and a seedling removal claw 56 is provided in front of the device.
And the claws 56 may be arranged on the left and right instead of the front and rear.

[0054]

According to the present invention described in detail above, when the seedling extracting nail is reciprocated between the pot portion of the seedling tray and the transplanting portion to the field, the seedling is pierced to return to the transplanting portion. Since the traveling speed of the process is slower than the traveling speed of the outbound process for taking out the seedlings toward the pot, the seedlings that are pierced and conveyed (supplied) to the transplanting part fall unexpectedly from the seedling removal claws. It can be reliably supplied to the transplanting part without performing, and on the other hand, the moving speed in the outward stroke can be increased, so that the efficiency of seedling soil removal can be achieved.

[Brief description of the drawings]

FIG. 1 is a main part side view of a seedling rush start position according to a first embodiment of the present invention.

FIG. 2 is a side view of the main part after the seedling has entered.

FIG. 3 is a side view of a main part when seedlings are taken out from a pot portion.

FIG. 4 is a side view of a main part of the seedling soil during transport (supply) to the transplanting unit.

FIG. 5 is a side view of the main part in a state where the seedling soil has been delivered to the transplanting unit.

FIG. 6 is a side view of a main part of the same potion on the way to the pot for taking out seedling soil.

FIG. 7 is an elevation view of the claw operation mechanism.

FIG. 8 is a main part side view showing a relationship between the seedling feeding device and the claw operation mechanism.

FIG. 9 is a front view of a lateral feeding means in the seedling feeding device.

FIG. 10 is a front view of the seedling feeding device.

FIG. 11 is a side view showing the entire vegetable transplanter.

FIG. 12 is a plan view showing the entire vegetable transplanter.

FIG. 13 is a side view showing a second embodiment of the rotation holding means.

FIG. 14 is a plan view of the same.

FIG. 15 is a perspective view of a main part showing a second embodiment of the driving means of the claw operating mechanism.

[Explanation of symbols]

 37 Transplanting part 40 Pot part 41 Seedling tray 42 Claw operating mechanism 48, 49 Oval gear 56 Seedling take-out claw 57 Parallel link 59 Claw holder 65 Claw driving means 71 Claw guiding means M Driving means of claw operating mechanism 150 Transmission gear 150A, 150B Missing Tooth part 151 Transmission gear 151A, 151B Missing tooth part

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-311805 (JP, A) JP-A-5-7409 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01C 11/00-11/02 303

Claims (5)

(57) [Claims] A pot portion (4) in a seedling tray (41).
The seedling soil (C) of 0) is taken out by the seedling take-out nail (56),
The taken seedling soil (C) is transported to the transplanting part (37) in a state where it is pierced by the seedling removal nail (56), and the transported seedling soil (C) is dropped to the transplanting part (37) to be supplied. A method wherein the seedling removal claw (56) is pierced into a pot portion (40) and a forward stroke (X) toward a pot portion (40),
(C) is taken out from the pot part (40) and transplanted part (37)
A reciprocating motion with the return stroke (Y) toward the step (Y), wherein the moving speed of the return stroke (Y) is made slower than the forward stroke (X). 2. The seedling removal claw (56) penetrates into the depth direction deep part of the pot portion (40) at the terminal portion of the forward stroke (X), and pierces the seedling soil (C). C) is taken out from the pot portion (40), and the seedling soil (C) pierced from the seedling take-out claw (56) in the substantially vertical position at the terminal portion of the return stroke (Y) falls to the transplanting portion (37). The method of claim 1, wherein 3. A pot portion (4) in a seedling tray (41).
The seedling soil (C) of 0) is taken out by the seedling take-out nail (56),
The taken seedling soil (C) is transported to the transplanting part (37) in a state where it is pierced by the seedling removal nail (56), and the transported seedling soil (C) is dropped to the transplanting part (37) to be supplied. An apparatus, wherein the seedling removal claw (56) is pierced into the pot part (40) and a forward stroke (X) toward the pot part (40),
(C) is taken out from the pot part (40) and transplanted part (37)
A claw operating mechanism (42) for reciprocating with a return stroke (Y) toward the home position. The moving speed of the return stroke (Y) is made slower than that of the forward stroke (X) to cause the claw operation mechanism (42) to move. The method according to claim 1, further comprising a driving means (M) for driving the plant.
Feeding device. 4. The device according to claim 3, wherein the drive means (M) comprises a pair of elliptical gears (48) (49) which are rotated in mesh with one another. 5. A toothless portion (150A) (150B) (151A) (151B) at a portion corresponding to the terminal portion of the forward stroke (X) and the terminal portion of the return stroke (Y) of the seedling removal nail (56). 5. The device according to claim 4, wherein a pair of transmission gears (150) (151) is provided in the drive means (M).