JPS5811807B2 - Seedling planting device in rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is configured such that a planting arm is configured to operate vertically in a cyclical manner with a point in front of the seedling take-out section in the direction of movement as a base point, For planting, as the arm circulates, a unit amount of seedlings is taken out from the seedling take-out part and planted by a claw, and the seedlings held by these claws are pushed out into the mud at the planting location. The present invention relates to a seedling planting device in a rice transplanter which is equipped with a seedling pusher.

In the seedling planting device of this type of rice transplanter, the planting claw is fixedly attached to the planting arm, and the trajectory of the tip of the claw is controlled by the circulation trajectory of the arm. Because the trajectory of the tip of the nail is from backward upwards to forward downwards, the tip of the nail changes between the time the planting nail starts plunging into the mud and the lowest point on its downward path. The seedlings are dragged forward in the muddy soil, creating long grooves back and forth at the planting site, which tends to cause disturbances in the posture of the planted seedlings.

In order to overcome these drawbacks, the conventional technique for planting has been to improve the circulation mechanism of the arm so that the trajectory of the tip of the claw in the mud is vertical or even vertical. Various methods have also been proposed, but when this method is adopted, the circulation operation mechanism of the planting arm becomes complicated, and the circulation operation of the planting arm tends to lack smoothness.

In view of the above circumstances, the present invention aims to improve the posture of planting by shortening the dragging distance of the claws in muddy soil, and to achieve this effect without hindering the circulation operation of the arm. The purpose of this invention is to ensure the extrusion action of the seedling extrusion tool by effectively utilizing the structure to obtain such an effect.

In the seedling planting device of the rice transplanter according to the present invention, the planting claw is pivoted to the arm so as to be swingable back and forth, and the planting claw is moved to the lowest point of the descending path. A drive mechanism is provided to swing the claw tip trajectory backward in the direction of propagation from before reaching the planting claw, and the tip of the planting claw guides the front and rear surfaces of the seedling pusher to push out the seedlings. A guide part is formed to slidably hold the tool in the length direction of the planting claw, and further, a middle part of the link is swingably supported on the planting claw, and one end of the link is connected to the seedling extruder. It is pivotally connected to the rear end of the tool, and the other end is connected to the rear end of the tool.
The planting is pivotally connected to the other end of another link whose one end is connected to the arm side. The device is characterized in that the seedling pusher is configured to be able to move in and out in the length direction of the planting claw.

That is, according to the present invention, before the planted nail reaches the lowest point of its descending path, that is, when it plunges into mud, or just before it starts swinging so as to displace the tip of the nail backward. ,
This swinging of the claws reduces the forward ground movement speed of the claws as the aircraft advances, reducing the distance the claws drag in muddy soil.

Therefore, planting can achieve the effect of improving posture.

Moreover, for this reason, there is no need to make any changes to the circulation mechanism of the arm during planting, so the circulation operation of the planting arm can be maintained smoothly.

Furthermore, during planting, the swinging of the planting claws to improve posture can be used to push out the seedling pushing tool, but in particular, since the two are connected by a link mechanism, the special feature of the seedling pushing tool is Although the overall structure can be simplified without using a special drive device, the seedling extrusion can be performed reliably by forced extrusion, and the extrusion timing is also accurate.

Furthermore, the extrusion of the seedling pushing tool is performed by a link mechanism, and the relative movement of the extruding tool with respect to the planting claw is controlled by a guide portion formed at the tip of the planting claw, so that the pushing function and the guiding function are performed separately. Therefore, for example, for planting, the planting claw is swingably supported on the arm, and the seedling pusher is made to be different from the swinging fulcrum of the planting claw, so that the planting is swingable on the arm. The planting claw and the seedling pushing tool are shaped into a triangle with one side being an imaginary line connecting the swinging fulcrum of the planting claw and the swinging fulcrum of the seedling pusher by placing the tip of the claw against the planting claw. This is compared to the case where the seedling pushing tool is disposed at the tip of the planting claw, and the seedling pushing tool is elastically biased toward the planting claw side, and the seedling pushing tool is moved toward the tip side of the planting claw as the planting claw swings. This has the advantage that the seedling pusher can be pushed out without any relative friction between the planting claw and the seedling pusher, and wear and tear on the planting claw or the seedling pusher can be prevented.

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

Figure 1 shows a walking rice transplanter.

The rice transplanter is equipped with an engine 8 at the front of the machine frame, which has paddy wheels 6 with lugs that move on the tiller plate and can swing up and down, and a soil leveling float 7 that can move up and down and slide on the mud surface GL. At the same time, a seedling planting device was attached to the rear of the machine frame, and
A steering handle 10 that extends rearward at this seedling planting device
It is composed of a series of .

The seedling planting device is located in a forward downward tilting position, and
Seedling platform 1 capable of supplying seedlings toward its slanted lower end
A seedling extraction port 13 is formed in a fixed rail 12 that supports the seedling loading stand 11 and the inclined lower end of the placed seedling so as to be slidable in the horizontal direction.
In addition, a seedling planting claw device 14 is provided which operates in conjunction with the horizontal movement of the seedling table 11 to take out the placed seedlings from the seedling take-out port 13 in units of planting units and plant them.

As shown in FIGS. 2 and 3, the seedling planting claw device 14 operates cyclically up and down with the base point in front of the seedling take-out port 13 in the direction of travel. 1
By passing through the seedling take-out port 13 in an attitude and direction perpendicular to the placing surface of the seedling stand 11 as the seedlings are placed, it is possible to take out the unit amount of seedlings to be planted from the placed seedlings. In addition, a planting claw 2 capable of holding the cut seedlings is equipped to swing back and forth, a drive mechanism 4 is provided for swinging the planting claw 2, and the planting is carried out using an arm. 1 is equipped with a seedling pusher 3 that operates to push out the seedlings held by the planting claws 2 to the planting site when the planting claws 2 are at the lowest point.

The mechanism for cyclically operating the arm 1 for planting is pivoted at the middle part of the arm 1 for planting, and pivots at a position offset from the pivot point in conjunction with the lateral movement of the seedling stand 11. In addition to providing a rotating arm 15 that rotates as a core, planting is performed with the end of the arm 1 on the non-claw attachment side being pivotally supported, and a swinging link 16 is provided that regulates the posture of the arm 1 around the pivot point. It is set up and configured.

The planting claw 2 is attached to the arm 1 so as to be able to swing back and forth for planting.The installation requires two people, and this installation is removable by two people. A plate body with a U-shaped cross section, which is cut out and held between two seedlings with the stems and leaves of the seedlings inserted between the opposing sides, has a sharp point when viewed from the side with the concave portions facing each other. Nail member 2a
, 2a.

For planting, the swinging drive mechanism 4 for the wind 2 acts on a shaft 2B on the side of the planting claw 2, which is rotatably supported by the arm 1, and elastically swings the planting claw 2 forward. Dynamic biasing spring 4A
At the same time, the planting fixed to the rotating arm 12 is attached to a shaft 18 for pivoting the arm 1 (this means that as the rotating arm 15 rotates, the planting is attached to the pivot axis relative to the arm 1). rotate around.

) is fixed to the cam 4B, and a rod 4C is provided that can swing the planting claw 2 backward against the elastic biasing force as the cam 4B rotates. While swinging the claw 2 backward with the claw descending path having a starting point P before reaching the lowest point P of the claw descending path and ending at the lowest point P, The claw 2 is configured to swing forward with a starting point at a point on the ascending route that is close to the starting point, and an ending point at a point on the ascending route located at approximately the same height as the front P.

Therefore, of the movement trajectory a of the tip of the claw 2 relative to the aircraft, the descending latter half trajectory am and the ascending first half trajectory a2 are, as shown in the figure, the descending latter half trajectory 31' and the ascending first half when the claw 2 is not swung. They are respectively located at the rear of the trajectory portion a', and the ascending first half trajectory section a2 is located at the rear of the descending second half trajectory section a, so that the claw movement trajectory a relative to the aircraft as a whole has a figure-eight shape.

Therefore, the length of movement of the claws 2 in the mud during planting is determined by the movement trajectory A of the claws 2 relative to the mud surface GL shown in FIG.
As is clear from a comparison with the movement trajectory X of the claw 2 relative to the mud surface GL in the case where the claw 2 is not swung as shown in FIG. 6, the trajectory is extremely short.

The seedling pusher 3 is attached to a pair of claw members 2a, 2a so as to swing back and forth together with the claw 2.

Guide portions 2a', 2a', 2a", 2a formed on 2a
The mechanism for operating this seedling pusher 3 utilizes the swinging of the planting claws 2, It is comprised of a link mechanism 5 that operates the seedling pushing tool 3 in the direction of pushing out the seedlings.

In this link mechanism 5, a link 5A that moves the seedling pusher 3 along the extrusion direction by swinging is attached to the claw 2, and a free end of the link 5A and the planting arm 1 are attached to the claw 2. By providing the link 5B that swings the link 5A as the claw 2 swings, the seedling pusher 3 is operated to push out the seedlings as the claw 2 swings backward, and the claw 2 moves forward. It is configured so that it can be moved in retirement as it oscillates.

[Brief explanation of drawings]

The drawings show an embodiment of a seedling planting device in a rice transplanter according to the present invention, in which FIG. 1 is an overall side view of the rice transplanter, FIG. 2 is an enlarged side view with a partial cutout of the main parts, and FIG. Fig. 4 is a partially cutaway enlarged plan view of the section;
The figure is a diagram showing the locus of movement of the tip of the claw over the ground, and FIG. 6 is a diagram showing the locus of movement of the tip of the claw over the ground in a conventional device. 1... Planting arm, 2... Planting claw, 2a'j2a"...
...Guide part, 3... Seedling pusher, 4... Drive mechanism, 5...
...Link mechanism.

Claims (1)

[Claims] 1. In a seedling planting device of a rice transplanter, the arm 1 is configured to perform a cyclical operation up and down with the base point in front of the seedling take-out part in the direction of movement. The planting claw 2 is pivotally supported so as to be swingable back and forth, and the planting claw 2 is swung so that the claw tip trajectory is displaced backward in the traveling direction from this side before reaching the lowest point of its descending path. A drive mechanism 4 is provided, and the tip of the planting claw 2 guides the front and rear surfaces of the seedling pushing tool 3 to hold the seedling pushing tool 3 slidably in the length direction of the planting claw 2. Guide parts 2a/, 2a'' are formed, and the middle part of the link 5A is swingably supported on the planting claw 2, and one end of the link 5A is attached to the rear end of the seedling pusher 3. At the same time, the other end is pivotally connected to the other end of another link 5B whose one end is connected to the arm 1 side, and the planting is performed by swinging the planting claw 2 with respect to the arm 1. A seedling planting device in a rice transplanter, characterized in that both the links 5A and 5B are swung around a pivot by movement, so that the seedling pusher 3 can move in and out in the length direction of the planting claw 2. .