JPS6043924B2 - Seedling planting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that a planting claw and a seedling pusher are attached to a planting arm that circulates up and down, and the planting claw is placed at a seedling take-out location and a planting location in a seedling storage section. The present invention relates to a seedling planting device configured to operate in a circular motion up and down and to push the seedlings out of the nails with a seedling pusher that moves back and forth along the nail polisher.

This type of seedling planting device takes out the seedlings from the seedling stand,
Since the extruder can be used to accurately push out the seedlings and release them from the nail, it is possible to perform seedling planting operations with a stable planting posture. Furthermore, when configuring this type of seedling planting device, the overall structure can be made more compact by arranging the seedling stand and the planting arm close to each other.
Furthermore, if the seedling stand and planting arm drive mechanism are located away from the mud surface, it will be possible to reduce the amount of muddy water splashing and adhering to them.

For this purpose, a planting claw and a seedling pusher are attached to a planting arm that circulates up and down so that they can move in and out along the nail polishing, and the planting claw is biased to protrude with a spring, and the seedling pusher is a spring having a larger biasing force than the nail biasing spring, and a cam mechanism for driving the seedling pushing tool forward and backward, and urging the planting claw on the seedling pushing tool. A contact part is provided to catch and regulate the protrusion movement, and then the planting claw is moved to the protrusion limit following the movement of the contact part accompanying the initial protrusion operation of the seedling pusher, and then the seedlings are It has been considered that only the extrusion tool can be configured to protrude toward the tip of the claw, and this can achieve the above-mentioned effects of compacting the overall structure and preventing muddy water from adhering to it. Since the planting nails can also be driven by simply providing a drive mechanism for the planting nails, this method has the advantage that the overall structure can be made more economical compared to, for example, providing a separate driving mechanism for the planting nails. However, in the case of the above configuration, there is a risk that the nails in the mud will come into contact with the nails during planting, causing the nails to resist the force and unexpectedly move backward. If the pusher moves backward to a position beyond this point, the relative position between the claw and the pushing tool may become incorrect, and there is a risk that the subsequent operation may be difficult to perform smoothly.

The present invention has been made with the above-mentioned circumstances in mind, and
A planting claw and a seedling pushing tool are attached to a planting arm that circulates up and down so that they can move out and back along the nail blade, the planting claw is biased to protrude with a spring, and the seedling pushing tool is moved along the claw blade. Providing a cam mechanism for protruding and urging the seedling pusher with a spring having a larger urging force than the urging spring, and driving the seedling pusher out and back;
The seedling pushing tool is provided with a contact part that receives and regulates the biased protruding movement of the planting claw, and the planting claw follows the movement of the contact part accompanying the initial projecting operation of the seedling pushing tool. After the seedling pushing tool has been moved to the projection limit, the structure is configured so that only the seedling pushing tool is operated to project toward the tip of the claw, and when the seedling pushing tool is in the most protruding state, the protruding biasing force of the spring for the seedling pushing tool is is characterized in that it is configured to act also on planted nails.

That is, by once protruding and moving the claws and the pusher, the seedling accommodating part and the planting arm can be placed close to each other, or the seedling accommodating part and the planting arm drive mechanism can be placed in a position far away from the mud surface. In addition, since only the extrusion tool is driven, it has the advantage that the overall structure can be made cheaper, and the strong urging force of the extrusion tool is used to regulate the posture of the planting nail. As a result, we have achieved a seedling planting device that prevents the unexpected backward movement of the claws and allows for good planting.

Embodiments of the present invention will be described below based on illustrative drawings.

The figure shows a front engine 3, a rear seedling planting device, and a seedling planting device operated in cooperation with a float 1 that slides on the field and a pair of left and right running wheels 2, 2 that touch the ground on a hard surface. This figure shows a walk-behind rice transplanter that travels while supporting a body consisting of a control handle 4 and the like extending rearward and upward from the vicinity, and is configured to plant seedlings using the planting device as described below.

That is, the seedling tray 54, which is tilted backwards and is arranged so that the upper end side is deviated more rearward than the lower end side, is reciprocated horizontally with a constant stroke, and the machine advances further than the seedling tray 5. A hollow planting arm 6 is provided at the front side of the plant.

This planting arm 6 has an intermediate portion pivotally connected to a support shaft 8 fixed to the tip of a crank arm 7 that is driven and rotated around the horizontal axis, and a rear end thereof rotates around the horizontal axis. It is pivotally connected to the tip of a swinging arm 9 which is rotatably supported, and is configured to circulate up and down as the crank arm 7 rotates. Furthermore, a planting claw 10 and a seedling pusher 11 are attached to the planting arm 6.

These planting claws 10 and seedling pusher 11 are connected to the planting arm 6
The planting claw 10 is supported so as to be able to move forward and backward along the direction of the claw blade, and the planting claw 10 is biased to protrude by a spring 12, and the seedling pusher 11 is supported by a spring having a stronger biasing force than the spring 12. 13, it is biased in the protruding direction. Next, to explain the cam mechanism that drives the seedling pushing tool 11 in and out, the base end of the seedling pushing tool 11 has an intermediate part attached to the planting arm 6
One end of the swing link 14 is pivotally connected to the swing link 14 .

This swinging rework 14 is configured to abut on a cam 16 fixed to the support shaft 8 via a roller 15 pivotally supported on the other end side. This cam 16 has a planting claw 1 as described below.
0 reaches near the mud surface, the arc-shaped first cam surface S1 that restricts the extrusion tool 11 to a retreated position in the planting arm 6 against the urging force, and the planting claw 10 are near the mud surface. A gently inclined second cam surface S2 for gradually protruding and moving the pusher 11 downward when the seedling pusher 11 reaches the bottom dead center, and rapidly moving the seedling pusher 11 downward when the planting claw 10 reaches near the bottom dead center. A steeply inclined third cam surface S3 is formed to cause the seedling pusher 11 to move in a protruding manner, and a fourth cam surface S4 is formed to cause the seedling pusher 11 to move backward again against the urging force. In addition, the part of the seedling pusher 11 that is always located inside the planting arm 6 receives the abutted part 17b formed on the planting claw 10, and prevents the planting claw 10 from being urged and moved. In addition, the planting claw 10 is provided with an abutment portion 17a for blocking the movement, and when it comes into contact with the abutted portion 18b provided on the planting arm 6, the amount of extrusion movement of the seedling pusher 11 is increased. A contact portion 18a for regulating the protrusion limit of the planting claw 10 is formed in a small amount.

The operation of the seedling planting device with the above configuration will be explained.

That is, as the planting arm 6 circulates, the planting claw 10 is rotated up and down between the seedling take-out location and the planting location at the lower end of the seedling platform, and the seedling pushing tool 11 The nails also move together with the planted nails 10. On the other hand, in areas other than the portion where the planting claw 10 is located near the planting location, the seedling pusher 11 is held in a retracted position within the planting arm 6 by the action of the first cam surface S1 of the cam 16. Accordingly, the planting claw 10 is held in a protruding position slightly larger than the seedling pusher 11 due to the abutting action between the abutting portion 17a and the abutted portion 18b. Then, when the pushing tool 11 reaches near the planting location, the second cam surface S
At the same time, the planting claw 10 follows the movement of the abutting part 17a until the abutting part 18a and the abutted part 18b come into contact with each other. Then, when the planting claw 10 reaches near the bottom dead center, only the seedling pusher 11 suddenly moves to a position corresponding to the tip of the claw due to the action on the third cam surface S3. Furthermore, by the action of the fourth cam surface S4, the seedling pusher 11 and the planting claw 10 are returned to the retreating position. Therefore, with the operation of the planting arm 6, the planting claw 10 moves onto the seedling stand 5.
One block of block seedlings w is taken out one by one along the lower end row of the mat-like seedlings placed on the mat, and the block seedlings w are supported downward by the cooperative support action of the tip of the nail and the tip of the seedling pusher. Once the planting claw 10 and the seedling pusher 11 are moved downward, the seedling pusher 11 is moved downward to push out the block seedling W from the claw 10 and detached from the block seedling W. will be planted in the mud.

The seedling pusher 11 also includes a contact portion 19b of the planting claw 10 that has been moved to the protrusion limit in the maximum protrusion state.
A contact portion 19a is formed which comes into contact with the planting claw 10, and by this contact action, the protruding biasing force of the spring 13 can be used as a force for receiving and supporting the retreating movement of the planting claw 10.

[Brief explanation of drawings]

The drawings illustrate embodiments of the seedling planting device according to the present invention,
FIG. 1 is a side view of the walking rice transplanter, FIG. 2 is a schematic vertical side view of the seedling planting device, and FIG. 3 is a side view of the cam. ) 6... Planting arm, 10... Planting claw, 11... Seedling pusher, 12... Spring, 13
... Spring, 17a ... Contact part.

Claims (1)

[Claims] 1. A planting claw 10 and a seedling pusher 11 are attached to the planting arm 6 which circulates up and down so that they can move forward and backward along the claw blade, and the planting claw 10 is biased to protrude by a spring 12. The seedling pushing tool 11 is biased to protrude by a spring 13 having a larger biasing force than the claw biasing spring 12, and the seedling pushing tool 1
1, and the seedling pusher 11 is provided with an abutting portion 17a for receiving and regulating the biased protrusion movement of the planting claw 10, thereby controlling the initial protrusion operation of the seedling pusher 11. The planting claw 10 follows the movement of the abutting portion 17a accompanying the movement of the contact portion 17a.
After moving it to the protrusion limit, continue to push out the seedling pusher 1.
It is configured so that only 1 is operated to protrude toward the tip of the claw,
In addition, the seedling planting device is characterized in that the projection urging force of the spring 13 for the seedling pushing tool also acts on the planting claw 10 when the seedling pushing tool 11 is in the most protruding state.