JPS6031455Y2 - rice transplanter - Google Patents

Description

[Detailed description of the invention] This invention provides a seedling planting claw device on the front side of the seedling stand.
The seedling planting claw device is equipped with an arm that rotates up and down for planting, and as the arm rotates, the planting
This rice transplanter is equipped with a claw for taking out and planting a unit amount of seedlings from a seedling take-out part, and a seedling pusher for pushing out the seedlings held by the planting claw into muddy soil at a planting point. Regarding.

In this type of rice transplanter, the planting claw of the seedling planting claw device is fixed to the planting arm, and the trajectory of the claw tip is controlled by the circulation trajectory of the arm. Because the planting is done in progress, the tip of the planting claw is dragged forward in the direction of movement through the mud from the time the planting claw begins to plunge into the mud until it reaches the lowest point on its descending path. When planting, long grooves are created back and forth at the site, which has the disadvantage that the posture of the planted seedlings tends to be disturbed.

In order to eliminate these drawbacks, conventional techniques have been used to improve the circulation mechanism of the planting arm so that the locus of movement of the tip of the claw in the mud is vertical or almost vertical. Various proposals have been made, but according to this method, the planting arm has a relatively large mass, and the planting arm with the large mass has a diameter of about 30 Or, p, m.
Because it is necessary to incorporate a mechanism to change the circulation locus for parts that rotate at such high speeds, the mechanism itself to change the locus is complex and large-scale.
In addition, it is unavoidable that the weight of the rice transplanter increases as a whole, although it is desired to reduce the weight.Furthermore, the planting arm, which rotates at high speed and has a large mass, draws an irregular trajectory. As a result, the kinetic inertia of the planting arm also acts irregularly, and this irregular kinetic inertia is difficult to eliminate with a balance weight or the like, which has the disadvantage of imparting irregular vibrations to the entire aircraft body.

In view of the above-mentioned circumstances, the present invention is designed to divide the seedlings into the arms in order to shorten the distance of the claws dragging in the mud while ensuring the smooth circulation of the arms. By moving the claws relative to each other, the planting is intended to suppress disturbances in posture, and at the same time, the relationship between the seedling splitting claws and the seedling pusher, which occurs due to the relative movement of the seedling splitting claws, is suppressed. The object of the present invention is to provide a rice transplanter which eliminates the occurrence of relative positional displacement and further has a simplified drive structure for a seedling pusher.

The characteristic configuration of the rice transplanter according to the present invention is that a seedling tray is placed at the rear in the direction of movement of the machine, and a planting arm is placed in front of the seedling tray and rotates up and down at a position in front of the seedling tray. In a rice transplanter equipped with a seedling planting claw device, a pair of left and right seedling dividing claws is attached to the tip of the arm, and the planting is performed using the seedling dividing claws in the front and back direction with respect to the arm. A mechanism is provided to allow the seedling dividing claw to slide freely, and to start swinging the seedling splitting claw from before reaching the lowest point of its descending path so that the trajectory of the claw tip is displaced backward. A seedling pusher is provided within the width of the seedling dividing claws in the parallel direction, and is configured to be able to swing freely around a pivot point on the free end side of the planting arm relative to the swinging pivot position of the seedling dividing claws. , and the intermediate portion in the longitudinal direction of this seedling pusher and the intermediate portion in the longitudinal direction of the seedling dividing claw are connected by a flexible connecting mechanism that allows relative movement only in the longitudinal direction of each other. This configuration provides the following effects.

In other words, planting is not done by changing the circulation locus of the arm, but by swinging the pair of left and right seedling dividing claws, which have much smaller mass, to change the trajectory of the claws at the tips of the seedling dividing claws. In planting, there is less risk of the machine body being subjected to irregular vibrations due to irregular motion inertia, as would be the case when changing the arm's circulation locus, and it also eliminates the need for a large-scale changing mechanism to change the claw locus. This has the advantage of avoiding the inconvenience of increasing the weight of the rice transplanter as a whole.

Then, the seedling dividing claw starts swinging so as to displace the tip of the claw backward, just before reaching the lowest point of its descending path, that is, when it plunges into muddy soil, or just before it reaches the lowest point on its descending path. This action reduces the speed at which the claws move forward relative to the ground as the aircraft advances, reducing the distance the claws must drag in muddy soil. It is advantageous in that there are fewer problems.

Furthermore, a seedling pushing tool is provided within the width of the left and right seedling dividing claws in the parallel direction, and the seedling pushing tool is configured to swing in the front and back direction together with the seedling dividing claws. It is possible to reliably push the scraped seedlings into the mud, and also to secure the relative position of the extruder to the swingable seedling dividing claws, so that the seedlings can be pushed into the mud in the desired position. It is easy to perform the pushing operation.

Moreover, since the seedling pushing tool is operated by the movement of the seedling dividing claw in relation to the back-and-forth swinging movement of the claw, a dedicated drive is required to drive the seedling pushing tool. This method is advantageous in that it does not require a device and does not cause a shift in the timing of the operation of the seedling dividing claws.

Hereinafter, embodiments of the present invention will be described based on the drawings.

Figure 1 shows a walking rice transplanter.

The rice transplanter has an engine-related device 7 mounted on the front part of the machine frame, which has paddy wheels 5 with lugs that move on the tiller and can swing up and down, and a soil leveling float 6 that can move up and down and slide on the mud surface GL. At the same time, a seedling planting device 8 is attached to the rear of the machine frame, and
A steering bundle 9 extending rearward is connected to the seedling planting device 8.

The seedling planting device 8 is located in a forward downward tilting position, and
Seedling platform 1 capable of supplying seedlings toward its slanted lower end
0 so as to be movable back and forth in the horizontal direction, and a seedling take-out port 12 is formed on a fixed rail 11 that supports the seedling loading table 10 and the inclined lower end of the placed seedlings so as to be slidable in the horizontal direction.
In addition, a seedling planting claw device 13 is provided which operates in conjunction with the horizontal movement of the seedling platform 10 to take out the placed seedlings from the seedling take-out port 12 in units of planting units and plant them. .

As shown in FIGS. 2 and 3, the seedling planting claw device 13 operates cyclically up and down with the base point in front of the seedling take-out port 12 in the direction of travel. 1
Due to the circulation operation of the seedling table 10, S
``By passing through the seedling take-out port 12 in an orthogonal posture and direction, it is possible to take out the planting unit amount of seedlings from the placed seedlings, and to move the planting claws 2, which can hold the cut seedlings, back and forth. A mechanism 3 for swinging the planting claw 2 is provided, and when the planting claw 2 is located at the lowest point P, the planting claw 2 is attached to the arm 1. For planting, a seedling pusher 4 that operates to push out the seedlings held in the seedlings to the desired location is attached.

The mechanism for cyclically operating the arm 1 for planting is such that the middle part of the arm 1 is pivotally supported for planting, and the mechanism moves the position deviated from the pivot point in conjunction with the lateral movement of the seedling stand 10. A rotating arm 14 that rotates as an axis is provided, and a swinging link 15 is provided that regulates the posture of the arm 1 around the pivot point for planting, with the non-claw attachment side end of the arm 1 being pivotally supported for planting.
It is a good idea to set up a.

The planting claw 2 is attached to the arm 1 so as to be swingable back and forth for planting, and is attached to the member 2A, and this attachment is detachable from the member IA. A pair of seedling dividing claws 2a, 2, which are sharp in an inclined view, cut out and hold the seedling with the stem and leaf part of the seedling inserted between the opposed parts.
It is constructed from a.

The mechanism 3 for swinging the claw 2 acts on the swinging shaft 2B on the side of the planting claw 2, which is rotatably supported by the arm 1, to move the planting claw 2 to the rear side. A spring 3A that elastically biases the swinging force is provided, and the planting to which the rotating arm 14 is fixed is carried out by a shaft 16 for pivotally supporting the arm 1 (this is connected to a shaft 16 for pivoting the arm 1, rotates about the pivot axis relative to the arm 1.

) is fixed to the cam 3B, and is provided with a rod 3C that can swing the planting claw 2 forward against the elastic biasing force as the cam 3B rotates. 3
Shape B and reach the lowest point P of the claw descending path P1
is the starting point, and the claw is swung backwards with the lowest point P being the end point, while the starting point is a point on the ascending route near the lowest point P, and the height is approximately the same as the front P1. The claw 2 is designed to swing forward with the end point being the ascending path point located at .

Therefore, of the movement trajectory a of the tip of the claw 2 relative to the aircraft, the descending latter half trajectory a1 and the ascending first half trajectory brown are, as shown in the figure, the descending latter half trajectory a11 and the ascending first half trajectory when the claw 2 is not swung. The first half of the ascending trajectory section a2 is located further behind the second half of the descending trajectory section a, and 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 A' 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 becomes very short.

The pushing tool 4 is a pair of seedling dividing claws 2at2 of the claws 2.
The planting is carried out by attaching the arm 1 to the arm 1 so as to be able to swing up and down with the pivot point R at a position apart from the rear surface of the claw 2, and at the middle part in the longitudinal direction and the above-mentioned The seedling dividing claws 2a, 2a in the middle in the longitudinal direction are fitted into and engaged with the elongated hole 17, which is an example of a flexible coupling mechanism that allows only relative movement in the longitudinal direction of each other. It is connected by a pin 18, and is configured to swing in the direction of pushing out the seedlings in conjunction with the backward swinging of the claw 2, that is, to move toward the tip of the claw 2.

[Brief explanation of the drawing]

The drawings show an embodiment of the rice transplanter according to the present invention. Figure 1 is an overall side view of the rice transplanter, Figure 2 is an enlarged side view with a partial cutout of the main part, and Figure 3 is a partial cutaway of the main part. Fig. 4 is an enlarged cross-sectional view taken along the line IV-IV in Fig. 2, Fig. 5 is a diagram showing the ground movement locus of the claw tip, and Fig. 6 is the ground movement locus of the claw tip in the conventional device. FIG. 1... Planting arm, 2... Planting claw,
3... Swinging mechanism, 4... Seedling pusher.

Claims (1)

[Scope of utility model registration request] A seedling tray 10 is arranged on the rear side in the direction of movement of the machine, and a seedling planting claw device 13 equipped with an arm 1 for planting is arranged in front of the seedling tray 10 and rotates up and down. In this rice transplanter, a pair of left and right seedling dividing claws 2a, 2a are attached to the tip of the arm 1, and the seedling dividing claws 2a, 2a are used for planting in the front and back direction with respect to the arm 1. The seedling dividing claw 2ay2a is configured to be swingable, and a mechanism 3 is provided to start swinging the seedling dividing claw 2ay2a so that the claw tip trajectory is displaced backward from before reaching the lowest point of the descending path. Within the width of the seedling dividing claws 2a, 2a in the parallel direction, the planting can swing freely around the pivot point R on the roadside side of the arm 1 from the swinging pivot shaft 2B position of the seedling dividing claws 2a, 2a. A seedling pushing tool 4 configured as above is provided, and the middle part in the longitudinal direction of the seedling pushing tool 4 and the middle part in the longitudinal direction of the seedling dividing claws 2a, 2a are arranged relative to each other in the longitudinal direction. A rice transplanter characterized in that the rice transplanter is connected by a flexible connection mechanism 17, 18 that only allows movement.