JPS6043922B2 - Seedling planting device in rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In the present invention, a planting claw and a seedling pusher are attached to a planting arm that circulates up and down. This invention relates to a seedling planting device in a rice transplanter, which is configured to reciprocate between a seedling planting point and a seedling extraction point, and then plant the block seedlings taken out at a seedling take-out point while being pushed out and separated by a pusher at the planting point. .

This type of seedling planting device has the advantage that it is easy to perform operations with a stable planting posture because the pushing tool can reliably push out the block seedlings from the claws and remove them.

Furthermore, when configuring this type of seedling planting device, by arranging the seedling accommodating portion for storing seedlings for planting and the planting arm in close proximity, the overall structure can be made compact, and the By providing the attached arm drive section and the seedling storage section as far away from the mud surface as possible, it is possible to reduce muddy water splashing onto them.

Further, in this type of seedling planting device, there is a problem in that when the planting claw reaches the seedling planting location in the mud, it scrapes up the muddy soil. In other words, as the aircraft advances, the planting claws tend to move (drag) through the mud, scraping up the mud and disturbing the posture of the planted seedlings. It would be mechanically difficult to solve this problem by changing the circulation locus of only the planting arm, because the planting arm is driven by a link mechanism. The present invention takes advantage of the fact that the planting posture can be stabilized by providing a seedling pusher, while also making the overall structure more compact, preventing muddy water from scattering into the seedling storage area, and furthermore, using claws to scrape muddy soil. In order to solve the problem of raising the seedlings and further stabilize the planting posture, the planting claw and seedling pusher equipped on the planting arm that circulates up and down are installed at the seedling planting area. A drive mechanism is provided that moves the planting claw and the seedling pusher integrally toward the rear and downward in the direction of movement of the machine with respect to the planting arm that moves downward, and then moves only the seedling pusher. It is characterized by In other words, since the planting claw is moved to protrude backward and downward in the direction of movement of the machine relative to the planting arm at the seedling planting site, the movement (dragging) of the claw as the machine moves is reversed. If this is offset by a protruding movement in the rearward direction, it is possible to reduce the amount of mud being scraped up by the claws.
Combined with the action of the seedling pusher, it is possible to further stabilize the planting posture, and since the claws are retracted into the arm when taking out the seedlings, the planting arm and the seedling storage are In addition, since the claws protrude downward when planting seedlings, the planting arm drive part and the seedling storage part are moved away from the mud surface by the amount of protrusion. By installing it in a location where it is possible to reduce muddy water adhesion.

Embodiments of the present invention will be described in detail below with reference to 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. It shows a walk-behind rice transplanter that runs while supporting a machine body consisting of a control handle 4 and the like extending rearward and upward from the vicinity, and is configured to plant seedlings at the planting stage 9 as described below.

That is, the seedling tray 5, 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 seedling tray 5 is moved further in the direction of movement of the aircraft than the seedling tray 5. A hollow planting arm 6 is installed at the front edge.
is in place.

This planting arm 6 has its middle portion pivotally connected to a support shaft 8 fixed to the tip of a crank arm 7 that is driven and rotated around a horizontal axis, and its rear end rotates around a horizontal axis. A rotatably supported rock. It is pivotally connected to the tip of the movable arm 9, 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
It is supported so that it can freely move forward and backward along the direction of the claw, and is configured to be moved in a protrusive manner via a drive mechanism that will be described below. That is, the planting claw 10 is biased to protrude by the spring 12, and the seedling pusher 11 is biased by the spring 12.
It is biased in the projecting direction by a spring 13 having a stronger biasing force.

One end of a swing link 14 whose intermediate portion is pivotally supported by the planting arm 6 is connected to the base end of the seedling pusher 11 . This singing link 14 is configured to come into contact with a cam 16 fixed to the support shaft 9 via a roller 15 pivotally supported on the other end side. As will be described later, this cam 16 has a pushing tool 11 until the planting claw 10 reaches near the mud surface.
The first cam surface S1 has an arcuate shape that restricts the planter to a position in which it has retreated into the planting arm 6 against the urging force, and when the planting claw 10 reaches near the mud surface, the extruder 10 is gradually protruded downward. A gently inclined second cam surface S2 for the transition, and a steeply inclined third cam surface S3 for causing the seedling pusher 11 to rapidly protrude downward and migrate when the planting claw 10 reaches near the bottom dead center. and a fourth cam surface S4 for moving the seedling pusher 11 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 the planting claw 10
The planting claw 10 is provided with an abutment part 17a for preventing the protrusion movement under pressure, and the planting claw 10 has a contact part 17a which is provided in the planting arm 6 and can be elastically displaceable. , this planting claw 1 is moved by an amount smaller than the amount of extrusion movement of the seedling extrusion tool 11.
A contact portion 18a is formed for regulating the protrusion limit of 0.

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. As a result, 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 17b. Then, when the seedling pusher 11 reaches near the planting location, the second cam surface S
When the planting claw 10 gradually protrudes and moves due to the action of 1, at the same time, the planting claw 10 follows the movement of the abutting part 17a to the protruding limit at which the abutting part 18a and the abutted part 18b abut. Then, when the planting claw 10 reaches near the bottom dead center, only the seedling pusher 11 is moved to the tip of the claw due to the action of the third cam surface S3. The seedling pushing tool 11 and the planting claw 10 are moved back to the retreating position by the action of the fourth cam surface S4. In addition, Fig. 2 shows the claw 10 when the machine is stopped.
Fig. 4 shows the trajectory A1 of the claw 1 in the aircraft progress state.
The locus of 0 is shown. Therefore, with the operation of the planting arm 6, the planting claw 10 sequentially takes out block seedlings W for one plant along the lower end row of the mat-like seedlings placed on the seedling stand 5, and
The tip of the nail is brought downward while supporting the block seedling W by the cooperative support action with the tip of the seedling pusher, and once the planting nail 10
After moving both the seedling pushing tool 11 and the seedling pushing tool 11 downward, the seedling pushing tool 11 is moved downward to push out the block seedling W from the claw 10 and release it, and the block seedling W is planted in the mud. Become.

Brief Description of the Drawings The drawings illustrate embodiments of the seedling planting device in the rice transplanter according to the present invention, FIG. 1 is a side view of the walking rice transplanter, and FIG. 2 is a longitudinal side view of the seedling planting device. , FIG. 3 is a developed cross-sectional plan view of the same, and FIG. 4 is a side view showing the locus of the claw as it advances.

6... Planting arm, 10... Planting claw,
11... Seedling extrusion tool.

Claims (1)

[Claims] 1. A planting claw 10 and a seedling pushing tool 11 equipped on a planting arm 6 that operates in a circular manner up and down are moved to a planting arm 6 that moves downward at a seedling planting location. A seedling planting device for a rice transplanter, characterized in that a drive mechanism is provided for projecting and moving only the seedling pusher 11 after integrally moving the seedling pusher 11 toward the rear and lower side in the direction of movement of the machine.