JP3234440B2 - Method and apparatus for transferring seedlings with soil from 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 (separation method) of a transplanter, and is used for transplanting vegetables such as cabbage and lettuce.

[0002]

2. Description of the Related Art Vegetable transplanters are known in which soil seedlings are raised in seedling trays having pot portions in a vertical and horizontal lattice arrangement, and seedling soil (soiled seedlings) is taken out from the pot portions and transplanted. , The mechanization of agricultural work. In this vegetable transplanter, it is important to take the seedling soil from the pot portion and supply it to the planting device, and various takeout techniques (dispensing techniques) have been proposed because the takeout strength is strong. .

One of the methods is to use a water drain hole formed at the bottom of the pot part to push an extruding tool into the hole to extrude seedling soil from an opening of the pot part, and to plant the extruded seedling soil on a horizontal conveyor. (Conventional example 1). In the other, the seedling removal claw enters and exits the seedling soil from the opening of the pot portion to remove the seedling soil from the opening of the pot portion, and the pierced seedling soil is planted by reciprocating movement of the seedling removal claw. There is a device that feeds the paper to an apparatus (2 of the conventional example).

Further, as another one, a technique in which the conventional example 1 and the conventional example 2 are combined has been proposed (Japanese Patent Laid-Open No. 4-33).
See No. 0211, 3) of the conventional example.

[0005]

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.

[0006] 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. Further, in the second conventional example, when the seedling removal claw is inserted into the pot portion, the leaves of the seedling soil may be pierced or broken, which may result in poor survival after transplanting and leaf withering. This may have a negative effect on the growth of seedlings.

Further, when the seedlings are pierced with seedling removal nails and sent to the planting apparatus, the leaves of the seedlings are dripping or if they are the lower leaves, they come into contact with other members and fall. There was a possibility that this would result in poor survival after transplantation. 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.

In addition, since the seedling soil is pierced by the seedling removal nails and sent to the planting device, the same problem as in the conventional example 2 remains. Therefore, the present invention does not hurt the leaves by intruding the seedling removal nails into the potting seedlings so that the leaves in the seedlings are scooped and then rushing into the seedlings. It is an object of the present invention to provide a method and apparatus for distributing leaves which can be reduced when they are dispensed to a planting apparatus.

[0009]

According to the present invention, there is provided a seedling take-out position for taking out seedlings C from the pot portion 40 of the seedling tray 41,
A method for distributing soiled seedlings of a transplanter that reciprocates a seedling removal claw 39 between a seedling supply position where the soiled seedlings C are dropped into the planting device 31 from above, and achieves the above object. The following technical measures have been taken to achieve this.

That is, the present invention according to the present method provides
The reciprocating movement of the claws 39 moves from the seedling removal position to the seedling supply position.
Traveling from home and returning from seedling supply position to seedling removal position
And the first of the seedling removal nails 39 at the time of the outward movement.
Tip movement trajectory X and the seedling removal claw 39 at the time of the return stroke
And the second tip movement trajectory Y
The second tip movement trajectory Y is at the intersection
The leaves in the seedlings are shifted downward in
39, so that the seedlings
After scooping the leaves at 39, the seedling removal claw 39
The potted seedling C of the pot part 40 is pierced and held and taken out.
After that, the first tip movement trajectory X is
Located above the second tip movement trajectory Y, from the intersection
Up to the seedling supply position, the first tip movement locus X is
Soiled by seedling removal claw 39 located below end movement locus Y
It is characterized in that seedlings C are distributed . In addition, the present invention according to the device, the seedling harvesting by the claw operating mechanism 42
The reciprocating movement of the claws 39 moves from the seedling removal position to the seedling supply position.
Traveling from home and returning from seedling supply position to seedling removal position
And the first of the seedling removal nails 39 at the time of the outward movement.
Tip movement trajectory X and the seedling removal claw 39 at the time of the return stroke
And the second tip movement trajectory Y
The second tip movement trajectory Y is at the intersection
The leaves in the seedlings are shifted downward in
39, so that the seedlings
After scooping the leaves at 39, the seedling removal claw 39
The potted seedling C of the pot part 40 is pierced and held and taken out.
After that, the first tip movement trajectory X is
Located above the second tip movement trajectory Y, from the intersection
Up to the seedling supply position, the first tip movement locus X is
Soiled by seedling removal claw 39 located below end movement locus Y
The posture guiding means 4 of the seedling removal claw 39 so that the seedling C is distributed.
7, 67 are provided in the claw operating mechanism 42 .

The posture guiding means 47, 67 are composed of a crank body 47 having a projection 47a which is driven to rotate about an axis which intersects the reciprocating movement direction of the seedling picking claw 39;
And a claw holder 49 having a guide roller 67 that rolls on an outer peripheral surface 58 of the crank body 47. When moving, the protrusion 4 of the crank body 47
7a can be rotationally displaced before the seedling C.

[0012]

According to the present invention, the rotation of the driving body 45 in the claw operating mechanism 42 causes the seedling extracting claw 39 to reciprocate between the seedling extracting position and the seedling supplying position, and the crank body provided in the claw operating mechanism 42. When the seedling removal claw 39 advances to the seedling removal position,
The locus of movement Y shifts so as to scoop the leaves of the seedling C, thereby preventing the leaves from piercing.

When the pierced seedling C is supplied (separated) to the planting device 31 along the movement trajectory X, the protrusion 47a of the crank body 47 is rotated and displaced ahead of the seedling C, so that Leaves do not become entangled during transport, and prevent fallen leaves here.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. The vegetable transplanter 11 shown in FIG.
Is a walking type having a steering handle 13 at a rear portion thereof, in which soiled seedlings C are planted at predetermined intervals in the ridges 14 while running in the longitudinal direction across the ridges 14.

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.

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 2 via transmission case 23
4 is supported, and the drive wheels 24 can be driven by the wrapping transmission body in the transmission case 23. This drive wheel 24 is ridge 1
Roll in the groove between the four. In addition, a pair of left and right front wheels 25 and a ridge / shoulder copying roller 26 are provided at a front portion of the traveling vehicle body 12.

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 work unit 30 has a seedling supply (dispatching) device 10 shown in FIGS. 1 to 9, a planting device 31 for planting the soild seedling C supplied from the seedling supply device 10 in the ridge 14, and the like. Receiving shaft 32 supported on the fixed side of the transmission case 19 and the like
The movable frame 33 swings up and down around an axis of the movable frame 33. Note that a pressure reduction / covering roller 34 is provided at the rear of the movable frame 33.

The planting device 31 is supported by a movable frame 33 via a suspension link 35 so as to be vertically swingable by a parallel link 36. A beak-shaped planting tube 37 is attached to the tip of the parallel link 36. The planting cylinder 37 is moved up and down by a crank motion of a crank body 38 linked to a middle part of the parallel link 36, and draws an elliptical locus vertically long in a side view.

The seedling tube 37 is opened upward, and the seedling C is dropped from the seedling supply device 10 disposed above the seeding device 31 so that the seeding tube of the seeding device 31 is removed. The seedling C is supplied into the inside 37. When the planting cylinder 37 is moved down by the parallel link 36 and pierced into the ridge 14 after the seedling C is supplied, the lower tip The part is opened and the seedlings C with soil are planted in the ridges 14.

The seedling supply device 10 is provided at a predetermined seedling take-out position with respect to the planting device 31 from a seedling tray 41 in which a large number of pot portions 40 in which the seedlings C are grown are arranged vertically and horizontally. The seedlings C are taken out one by one, and the soild seedlings C are transported above the planting device 31 and then dropped into the planting tube 37. The seedling tray 41 is made of resin and has flexibility, and is provided with a large number of pots 40 arranged vertically and horizontally protruding from the back, and a drained hole (not shown) is formed at the bottom of the pot 40. Are formed. In each pot portion 40, seedlings C with soil are raised, and gaps are formed between the pot portions 40 vertically and horizontally. Also, as the seedling tray 41,
There are several types having different pitches between the pot portions 40, and the seedling supply device 10 of the present embodiment can correspond to the seedling tray 41 having two types of pitches between the pot portions 40.

As shown in FIGS. 1 to 6, the seedling supply device 10 is provided with a seedling extraction position (see FIG. 1) for taking out soiled seedlings C from the pot portion 40 of the seedling tray 41 and a planting device 31. A claw operating mechanism 42 for reciprocating the seedling removal claw 39 between the seedling supply position (see FIG. 4) where the soild seedling C is dropped from above.
The mechanism 42 supplies the seedlings C with soil to the planting device 31 one by one from a large number of pot portions 40. Further, the seedling supply device 10 is provided behind the claw operating mechanism 42 and has a large number of pot portions 4 that are arranged vertically and horizontally.
And a transport mechanism 43 for transporting the seedling tray 41 in the horizontal direction and the vertical direction so as to sequentially position the “0” at the seedling removal position by the claw operating mechanism 42.

The claw actuating mechanism 42 takes out the seedling C from the pot part 40 by piercing the tip of the seedling removal nail 39 into the seedling soil of the seedling C and then scooping it up. It is configured to be transported toward the supply position while substantially maintaining the inclined posture, and until the soil seedling C is taken out from the pot portion 40 at the seedling removal position and supplied to the planting device 31 (forward stroke). 1 draws a trajectory X indicated by a dashed line in FIG. 1 and supplies seedling C with seedling C to planting device 31 before seedling removal nail 39 approaches pot portion 40 at the seedling removal position. The tip of the seedling removal claw 39 up to (return process) is shown in FIG.
Is formed so as to reciprocate the seedling removal claw 39 so as to draw a locus Y indicated by a dotted line, and the locus Y is shifted downward in the middle to scoop the leaves of the seedling soil C. . That is, the reciprocating motion of the seedling removal claw 39
Indicates the traveling path from the seedling removal position to the seedling supply position and the seedling
This is a return stroke from the supply position to the seedling removal position.
The first tip movement trajectory X of the seedling removal nail 39 at the time of the traveling process
The second tip movement gauge of the seedling removal claw 39 at the time of the return stroke
Trace Y intersects with each other in the middle of the process,
The second tip movement trajectory Y is shifted downward at the intersection.
The leaves in the seedlings are scooped by the seedling removal nails 39
The seedling removal nail 39 scoops the leaves.
Then, the seedling removal claw 39 attaches the pot portion 40 to the soil.
The seedling C is pierced and held and taken out.
The motion trajectory X is the second tip motion trajectory Y up to the intersection.
And the first from the crossover to the seedling supply position.
Is below the second tip movement trajectory Y.
And the seedling C is distributed by the seedling removal claw 39.
You.

Hereinafter, the structure of the claw operating mechanism 42 of this embodiment will be specifically described.
A machine frame 44 fixed above is provided.
A driving body 45 composed of a gear that is driven to rotate at a constant speed counterclockwise in FIGS. 1 to 6 around the support shaft 45 a by the rotational power from the O-shaft 22 is provided. Further, a driven body 46 composed of a gear meshing with the driving body 45 is provided on the machine frame 44 so as to be rotatable around a shaft 46a. The driven body 46 having the protrusion 47a is provided with a crank body 47 rotatably around a shaft 46a. That is,
A crank body 47 having a projection 47a that is driven to rotate about an axis 46a that intersects the reciprocating direction of the seedling removal claw 39 is provided.

On the other hand, a vertically long swing arm 48 is provided on the machine frame 44 so as to swing freely around a shaft 48a.
A cylindrical claw holder 49 for holding the seedling removal claw 39 is rotatably connected to the tip of the swing arm 48 via a shaft 49a. Crankshaft 46 in crank body 47
a position of a predetermined distance from a is connected to one end of a transmission link 50 via a shaft 50a, and the other end of the transmission link 50 is connected to a swing arm 48 via a shaft 50b; Thus, the crank body 47, the swing arm 48 and the transmission link 50 constitute a claw holder reciprocating means for reciprocating (oscillating) the claw holder 49 by the rotational movement of the driven body 46. The exercise causes the seedling removal claw 39 to reciprocate between the seedling removal position (see FIG. 1) and the seedling supply position (see FIG. 4). In addition, the number of teeth of the driving body 45 and the number of teeth of the driven body 46 are made equal such that the rotation of the driving body 45 makes one rotation of the seedling removal claw 39 between the seedling removal position and the seedling supply position. .

A rod-shaped rod 51 is inserted and held in the claw holder 49 so as to be movable in the axial direction.
At the seedling removal position, it is possible to move back and forth toward the seedling tray 41 of the transport mechanism 43. A pair of right and left seedling removal claws 39 that are stabbed diagonally from above into the seedlings of the soiled seedlings C in the pot portion 40 are fixed to the distal end of the rod 51.

The base end of the rod 51 projects outward from the rear end of the claw holder 49, and a compression coil is provided between the claw holder 49 and the flange 51a provided at the base end of the rod 51. A spring 52 is interposed, and constitutes an urging means for constantly urging the rod 51 in a retreating direction (a direction away from the transport mechanism 43). In the vicinity of the distal end of the rod 51, a projection 5 which abuts against the distal end surface of the claw holder 49 is provided.
3 is provided to regulate the retreat amount of the rod 51 due to the urging force of the spring 52.

A notch 54 is formed in the vicinity of the rear end of the rod 51 in the axial direction, and a hook-like lock member 56 has a shaft 56a on a flat plate portion 55 integrally provided below the claw holder 49.
The distal end of the lock member 56 has a notch recess 54 for holding the rod 51 in a protruding position (see FIG. 2) from the claw holder 49 toward the transport mechanism 43 in the protruding position. An engaging portion 57 is provided so as to freely engage with and disengage from the main body. The lock member 56 is biased by a biasing means (not shown) such as a coil spring fitted on the shaft 56a.
The engaging portion 57 is constantly urged in a direction in which the engaging portion 57 engages with the cutout concave portion 54 of the rod 51.

The claw actuating mechanism 42 projects the seedling removal claw 39 from the retracted posture (see FIG. 1) at the seedling removal position (see FIG. 2).
Claw pushing means for changing the posture. The means includes an extruding arm 59 for pushing out a seedling removal claw 39 so as to penetrate the seedling soil of the soild seedling C in the pot portion 40, and a base end of the arm 59 is connected to the machine frame 44 via a shaft 59a. FIG.
2 is swingably provided between a standby posture shown in FIG. 2 and an operation posture shown in FIG. The push arm 59 is integrally provided with an engagement arm 60 shorter than the arm 59, and a notch-shaped engagement recess 6 is provided at a tip end of the engagement arm 60.
0a is formed. On the other hand, the shaft 4 in the driving body 45
A protruding pin-shaped engaging portion 61 that engages with the engaging concave portion 60a of the engaging arm 60 in order to operate the pushing arm 59 is provided at a predetermined distance from 5a.

One side of the pushing arm 59 abuts on a connecting portion 64 (pivot portion) of two links 62 and 63 forming a toggle joint for connecting the claw holder 49 and the seedling removing claw 39. The connection portion 64 is pushed in to push out the seedling removal claw 39. Extrusion arm 5
9, the distance from the abutting portion with the connecting portion 64 to the shaft 59a is different from the engagement recess 60a in the engagement arm 60 to the shaft 5a.
9a is set to be larger than the distance to
The connecting portion 64 is largely pushed in with a small amount of movement of the engaging portion 61 of FIG. 5 to speed up the pushing operation of the seedling removal claw 39. Further, when the seedling removal claw 39 is pierced deep into the seedling soil, the engaging portion 61 of the driving body 45 is detached from the engaging concave portion 60 a of the engaging arm 60.

The two links 62 and 63 constituting the toggle joint are connected in a shape of a letter when viewed from the side, and a connecting portion 64 of the links 62 and 63 is formed in a cylindrical shape so as to abut against the pushing arm 59 smoothly. It is configured. In addition, from the beginning to the end of the piercing movement of the seedling removal nail 39,
The pushing direction of the connecting portion 64 by the pushing arm 59 is the same as the seedling removing claw 3 at the link 63 connected to the seedling removing claw 39 side.
9 toward the pivot 63a.

A biasing means (not shown) such as a coil spring for biasing the arm 59 in a direction for returning the arm 59 to the standby position is interposed on the shaft 59 a of the pushing arm 59. When the pushing operation is completed and the engaging portion 61 of the driving body 45 is disengaged from the engaging concave portion 60a of the engaging arm 60, the pushing arm 59 is automatically changed to the standby posture by the urging force of the urging means. . Shaft 59a of extrusion arm 59
A stopper 65 is provided on the machine frame 44 below the lower surface of the engaging arm 60 in the standby position to prevent the pushing arm 59 in the standby position from rotating by the urging force of the urging means. And hold the posture.

While the above-mentioned claw pushing means changes the posture of the seedling removal claw 39 from the retracted posture to the protruding posture,
The claw holder stopping means for stopping the operation of the claw holder 49 by the claw holder reciprocating means is configured such that the driving body 45 and the driven body 46 are toothless gears having toothless portions 45b, 46b at one circumferential position. The nail 39 is pierced straight in the axial direction of the rod 51 with respect to the seedling soil in the pot portion 40 to eliminate the displacement at the time of piercing,
The seedling removal claws 39 are accurately and reliably inserted into the seedling soil.

A locking member 56 which engages with the notch 54 of the rod 51 to hold the seedling removal claw 39 in the protruding position.
When the seedling removal claw 39 is transferred to the seedling supply position (see FIGS. 4 and 5), the transmission link 50 and the crank body 4
The lock member 56 is configured to be pushed in the release direction by abutting the connection shaft 50a with the lock member 7 and the lock member 56 need not be separately provided, so that the structure is simplified.

When the engagement of the lock member 56 with the notch recess 54 is released and the seedling removal claw 39 is retracted toward the claw holder 49 by the urging force of the spring 52, the claw 39 is pierced and held by the claw 39. An extruding member 66 for extruding the soiled seedling C against the nail 39 in order to drop it is attached to the nail holder 49. The pushing member 66 is formed by bending a steel wire, and the seedling extracting claw 3 is formed on an annular portion formed at the distal end.
9 is inserted.

The claw actuating mechanism 42 is provided with a posture guiding means for guiding the claw holder 49 in an inclined posture such that the claw tip of the seedling removal claw 39 draws the trajectories X and Y shown in FIG. This means changes the outer peripheral shape of the crank body 47 in FIGS.
A guide roller 67 (guide portion) which is formed in a cam shape shown in FIG. 6 and rolls on an outer peripheral surface 68 of the crank body 47 is pivotally supported by the claw holder 49, and the roller 67 is connected to the outer peripheral surface of the crank body 47. A biasing means (not shown) such as a coil spring for rotating and biasing in a direction of pressing against the pawl holder 58 is provided.
It is configured by externally fitting to the shaft 49a of the ninth. Thus, the crank body 47 constituting the pawl holder reciprocating means is provided.
By controlling the attitude of the inclined attitude of the claw holder 49 by using the above, the number of constituent members can be reduced, the structure can be simplified, and the like.

Hereinafter, the above-described claw operating mechanism 42 of this embodiment will be described.
When the seedling removal claw 39 is transferred to the seedling removal position, that is, when the tip of the claw 39 is
0 (see FIG. 1), the driving body 45
The engaging portion 61 of the engaging arm 60 is in the standby posture.
0 is engaged. When the driving body 45 rotates in such a state, the pushing arm 59 is swung clockwise in FIG. 1 together with the engaging arm 60, and the pushing arm 59 pushes the connecting portion 64 of the toggle joint, so that the seedling removal claw 39 is pushed.
Is pushed out in the axial direction of the rod 51 and rushes into the seedling soil of the soiled seedling C in the pot portion 40 at the seedling removal position (see FIG. 2). When the claw 39 is pushed into the back of the seedling soil, the engaging portion 61 of the driving body 45 is disengaged from the engaging arm 60, and the engaging arm 60 and the pushing arm 59 are returned to the standby posture.

At this time, since the engagement arm 60 is short and the push-out arm is long, the connecting portion 64 of the toggle joint is pushed relatively large with a small amount of rotation of the driving body 45. In the early stage of the piercing movement of the seedling extracting nail 39, the piercing speed of the seedling extracting nail 39 is relatively increased by the action of the toggle joint, and at the end of the exercise, the piercing speed is relatively small by the operation of the toggle joint. At the same time, a boosting action is generated, and the seedling removal nail 39 is reliably pushed into the seedling soil.

Also, during the pushing operation of the seedling removal claw 39, the toothless portion 45a of the driving body 45 and the toothless portion 4 of the driven body 46.
6a is brought into surface contact, the rotation of the driven body 45 is stopped, the swinging operation of the claw holder 49 is stopped, and the accuracy of the protrusion of the seedling removal claw 39 into the seedling soil is ensured. Nature is secured. The driving body 45 and the driven body 46
When the pushing operation is completed (see FIG. 2), the meshing of the gear teeth starts.

When the driving body 45 further rotates,
The seedlings with the nails 39 pierced are taken out of the pot portion 40 so as to be scooped up (see FIG. 3).
Is transported toward the seedling supply position above the transplant device 31 while preventing the seedling soil from falling off from the claws 39 in a substantially horizontal posture. In such a forward stroke, the guide roller 67
Claw holder 4 by posture guiding means constituted by
9 is held in an appropriate inclined posture, and the protruding portion 47a of the crank body 47 is rotationally displaced in advance of the seedling C being distributed in a piercing state, thereby preventing leaf fall during distribution. .

When the seedling removal nail 39 is transferred to the seedling supply position, that is, when the seedling removal nail 39 is positioned above the planting tube 37 of the planting device 31 (see FIG. 4), the seedling removal nail 39 is The vertical posture is set, and the supply posture of the soil seedling C to the planting cylinder 37 is made appropriate. Further, the back surface of the lock member 56 is
a, the locking member 56 is pushed and the member 5
6 is disengaged from the notch concave portion 54 of the rod portion 51, and the claw 39 is
It is retracted upward by the urging force of No. 2 (see FIG. 5). At this time, since the seedling C with the soil hits the pushing member 66 and is prevented from moving upward, the seedling C is detached from the seedling removal claw 39 and naturally falls into the seedling tube 37.

Thereafter, the seedling removal claw 39 approaches the transport mechanism 43 while being held in the retreating posture. A projection 47a is formed in the crank body 47 for pushing the guide roller 67 of the claw holder 49 toward the transport mechanism 43 in accordance with the swing amount of the swing arm 48 so as to hold the take-out claw 39 and the claw holder 49 in a substantially vertical posture. I have.
When the seedling removal claw 39 is in the middle of the return stroke, the guide roller 67 gradually moves inward from the protrusion 47a of the crank body 47, and the claw holder 59 swings about the shaft 59a. Rotated with respect to the arm 48, the seedling removal claw 39 held by the claw holder 59 is changed to a substantially horizontal posture, and the claw 39 removes the soild seedling C of the pot portion 40 at the seedling removal position. The pot portion 40 is shifted so as to be raked from below and enters the rush start position on one side near the opening edge of the pot portion 40.

By repeating the above operations, the seedling removal nail 3
As shown in FIG. 1, while the tip of 9 is drawing a trajectory having a substantially figure-eight shape when viewed from the side, the nails 39 sequentially supply soild seedlings C one by one to the planting device 31. Next, the transport mechanism 43 will be described. As shown in FIGS.
And a transport frame 71 supported by the base frame 72 so as to be able to reciprocate in a horizontal direction (left-right direction). Seedling trays 41 arranged in the direction are attached so that they can be fed vertically.
The transport frame 71 is provided with a guide member 90 that guides and supports the side edge of the seedling tray 41 so as to vertically curve the seedling tray 41 along the vertical feed wheel 77.

A support plate 73 for supporting the bottom of the seedling tray 41 is attached to the transport frame 71 so as to be inclined forward and downward. As shown in FIG. 9, a guide wall 73a is formed in the center of the support plate 73 in the left-right direction to engage with the gap between the pot portions 40 and prevent the seedling tray 41 from being displaced in the left-right direction. I have. The support plate 73 is extended to the pot portion 40 at a position where the seedling C is taken out by the seedling take-out claw 39 of the claw operating mechanism 42. Is a support member 74 that supports the bottom of the pot portion 40 at the seedling removal position so as to prevent the seedling tray 41 from bending when the seedling C is pierced into the seedling C.

A horizontal shaft 75 is rotatably mounted on the transfer frame 71 via a bearing 76.
A pair of left and right vertical feed wheels 77 are integrally provided. At the inner surface side of the wheel 77, a transport pin 78 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. Can be fed vertically. The transport pins 78 are selectively mounted in a plurality of mounting holes (not shown) provided around the peripheral edge of the vertical feed wheel 77.
The mounting position can be changed according to the pitch between them.

A drive link 80 is connected to a horizontal shaft 75 of the vertical feed wheel 77 via a one-way clutch 79. The drive link 80 is moved within a predetermined swing angle range (from the rotation start end position to the rotation end position). The wheel 77 intermittently rotates only in one direction (the direction in which the seedling tray 41 is sent downward) by reciprocating between the positions.
A pin 83 protrudes from the tip of the drive link 80.

The drive link 80 is urged by a coil spring 84 fitted around the horizontal shaft 75 to rotate the one-way clutch 79 in the idling direction (b). The drive link 80 by the urging force of the spring 84
The rotation of the drive link 80 is regulated by a regulating body 81 attached to the transport frame 71, whereby the rotation start end position of the drive link 80 is set.

The regulating body 81 is swingably attached to the transport frame 71 via a support shaft 81a. The regulating body 81 is formed with two fixing holes 87 arranged in parallel in the circumferential direction with the support shaft 81a as a center. One of the fixing holes 87 is selected and fixed to the transport frame 71 by bolts 88. Have been. Further, the regulating body 81 includes an abutment portion 82 against which the pin 83 of the drive link 80 abuts when the drive link 80 is rotated by the urging force of the spring 84, and the abutment portion 82 is stepped. The swing range of the pin 83 can be changed by swinging the regulating body 81 and fixing it to the transport frame 71 with bolts 88.

On the other hand, a lateral feed shaft 92 having a traverse groove 91 is rotatably mounted on the base frame 72.
A gear 95 is mounted on the shaft 92, and a gear 94 is engaged with the gear 95, and rotational power from the PTO shaft 22 is transmitted to the gear 94 by an appropriate rotational power transmission means. The gear 94 and the transmission gear 95 are provided in a gear box 96 which is detachably attached to the base frame 72 so as to be detachable and replaceable. Is adjusted so that the lateral feed amount of the seedling tray 41 can be synchronized with the operation of the claw operating mechanism 42 in accordance with the pitch between the pot portions 40.

A slider 98 having an engaging pin 97 for engaging with the traverse groove 91 is externally fitted to the lateral feed shaft 92. The slider 98 is connected to and integrated with the transport frame 71 via an arm 99. A horizontal feed mechanism is configured to reciprocate the transport frame 71 in the left-right direction via the slider 98 when the horizontal feed shaft 92 is rotationally driven. The slider 98
Between the base frame 72 and the bellows-like cover 1
00 is provided to prevent sand or the like from entering the traverse groove 91.

Crank arms 101 are provided at both left and right ends of the horizontal feed shaft 92, and a transmission link 102 is rotatably provided on the transport frame 71 via a horizontal shaft 102a.
The transmission link 102 includes an engagement portion 103 that engages with the crank arm 101 when the transport frame 71 moves to the leftmost end or the rightmost end.
2 and the drive link 80 are connected by the connection link 104, and the drive link 80 is opposed to the urging force of the spring 84.
The rotation driving force for rotating the one-way clutch 79 in the power transmission direction (a) from the rotation start end position to the predetermined rotation end position is intermittently applied to the drive link 80.

That is, when the transmission link 102 is swung by the crank arm 101, the rotational driving force is transmitted to the drive link 80 via the connection link 104, and the drive link 80 is forcibly moved to a certain rotation end position. The seedling tray 41 is rotated so that the vertical feed wheel 77
It is rotated by the pitch of 0. When the crank arm 101 is disengaged from the engagement portion 103 of the transmission link 102, the drive link 80 is returned to the rotation start end position by the urging force of the spring 84, and the transmission link 102
Is also returned. During this return, the one-way clutch 79 idles, and the vertical feed wheel 77 is not rotated.

The vertical feed wheel 77 has a plurality of first engaging portions 85 arranged in a circumferential direction at a first central angle, and is provided on the inner peripheral side of the first engaging portions 85. At a second central angle different from the first central angle, a plurality of second engaging portions 89 are arranged in a row in the circumferential direction. The first engagement portion 85 and the second engagement portion 89 are both formed in a round hole shape. Further, the second central angle R2 is set to be larger than the first central angle R1. The restricting body 81 is provided with a detent mechanism 86 that engages with the first engaging portion 85 or the second engaging portion 89 so as to be freely detachable and positions the vertical feed wheel 77.

The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate. For example, in the above-described embodiment, the present invention is applied to a walking type transplanter, but may be applied to a riding type transplanter. Further, in the above-described embodiment, the claw operating mechanism 42 is provided in front of the transport mechanism 43 so that the claw 39 is inclined rearward. The transport mechanism 43 and the claw operating mechanism 42 can also be arranged on the left and right.

Further, in the above embodiment, the pushing-out arm 59 indirectly connects the seedling extraction claw 39 via the toggle joint.
Is pushed out, but the pushing arm 59 is directly
The nails 39 may be pushed directly out of the way. Further, the driving body 45 and the driven body 46
Need not form the toothless portions 45a and 46a. Even in such a case, according to the above embodiment, the predetermined amount of the piercing operation of the seedling removal claw 39 is performed with the rotation amount of the driving body 45 as small as possible. The seedling removal nail 39 can be prevented from piercing the seedling soil.

[0055]

As described above, according to the present invention,
When the seedling C is pierced by the seedling removal nail 39, the leaves do not break through, and the leaves can be prevented from falling even during the distribution, so that the survival after transplantation can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of an operation mechanism of a seedling removal nail according to an embodiment of the present invention, showing a state immediately before a seedling removal nail enters a seedling soil in a pot portion at a seedling removal position.

FIG. 2 is a side view of the operating mechanism showing a state in which a seedling removal claw is inserted into a seedling soil at a pot portion at a seedling removal position.

FIG. 3 is a side view of the same operating mechanism when the soild seedling is pulled out of the pot portion by the seedling extraction claw.

FIG. 4 is a side view of the operation mechanism when the seedling removal claw is at a supply position.

FIG. 5 is a side view of the operating mechanism when the soild seedling is detached from the seedling removal claw.

FIG. 6 is a side view of the operation mechanism showing a process in which the seedling removal claw approaches the transport mechanism.

FIG. 7 is a side view of a transport mechanism of the seedling supply device.

FIG. 8 is a part of a developed cross-sectional view of the transport mechanism.

FIG. 9 is a part of a developed cross-sectional view of the transport mechanism.

FIG. 10 is a side view of the transplanter.

[Explanation of symbols]

 31 seedling device 39 seedling removal claw 40 pot part 41 seedling tray 42 operating mechanism 47 crank body 67 guide roller

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A01C 11/00-11/02 303 A01C 11/02 365

Claims (3)

(57) [Claims] 1. A seedling take-out position for taking out a seedling (C) from a pot portion (40) of a seedling tray (41) and dropping the seedling (C) from above into a planting device (31). A method of distributing seedlings with a transplanter that reciprocates a seedling removal claw (39) between a seedling supply position and a seedling supply position, wherein the reciprocating movement of the seedling removal claw (39) is performed at the seedling removal position.
From the seedling supply position to the seedling supply position
It is a reciprocation process toward the place, and the seedling removal at the time of the outbound process
The first tip movement trajectory X of the claw (39) and the return stroke
The second tip movement trajectory Y of the mushroom seed removal nail (39) is
Crossing each other in the middle of the process, and
The motion trajectory Y is shifted downward at the intersection, and
The leaves in the garden with the seedling removal nail (39)
The seedling removal nail (39) scoops the leaf
From the pot (40) by the seedling removal nail (39).
The soiled seedling (C) is pierced and held and taken out.
Of the second tip movement until the tip movement trajectory X reaches the intersection.
It is located above the trajectory Y and extends from the intersection to the seedling supply position.
Then, the first tip movement trajectory X is changed to the second tip movement trajectory Y
Seedling (C) with seedling removal claw (39) located below
A method of feeding seedlings with a transplanter, characterized in that: 2. A take-out position for taking out a seedling (C) from a pot portion (40) of a seedling tray (41) and dropping the seedling (C) from above into a planting device (31). between the seedling supply position, a transplanter of feeding seedlings fraction with soil device comprising a pawl actuating device (42) for reciprocating the seedling taking out claw (39), wherein by claw actuating mechanism (42) Seedling removal nail (39)
The reciprocating movement is a round trip from the seedling removal position to the seedling supply position.
It is a return trip from the seedling supply position to the seedling removal position.
And the first tip of the seedling removal nail (39) during the outbound process.
End movement trajectory X and seedling removal claw at the time of the return stroke (39)
And the second tip movement trajectory Y
The second tip movement trajectory Y is at the intersection
The leaves in the seedlings are shifted downward in
It is made to be raked by (39).
Scoop the leaves with the nail (39) and then remove the seedlings (3
9) Soil the seedling (C) in the pot (40).
And then the first tip movement trajectory X moves forward.
Up to the intersection, the position is above the second tip movement locus Y
And a first tip movement gauge from the intersection to the seedling supply position.
When the mark X is located below the second tip movement locus Y,
Seeding seedlings (C) by nails (39)
The posture guiding means (47) and (67) of the extraction claw (39)
A soil seedling feeding device for a transplanter, which is provided in the nail operating mechanism (42) . 3. A crank body (47) having a projection (47a) that is driven to rotate about an axis that intersects the reciprocating direction of the seedling removal claw (39).
And a guide roller (6) pivotally mounted on the seedling removal claw (39) and rolling on the outer peripheral surface (58) of the crank body (47).
And a nail holder (49) having a projecting portion of the crank body (47) for moving the soild seedling (C) pierced by the seedling removing nail (39) to the seedling supply position. 3. The soil seedling delivery device for a transplanter according to claim 2, wherein (47a) is rotationally displaced prior to the soil seedling (C).