JPH0218991Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rice transplanter that is provided with a soil gathering tool that presses and moves mud toward the side of the planted seedlings as it moves downward, so as to be driven reciprocally up and down.

Such a rice transplanter is capable of backfilling the grooves that may be formed by the planting claws when planting seedlings as the machine moves.
This is designed to prevent planted seedlings from falling over, but in the past, the lowering range of the mulch tool was fixed, which could unnecessarily disturb the mud surface or disrupt the posture of the planted seedlings. It was hot.

In other words, when the mud is forced and fluidized by the earth-filling tool,
When the mud is soft, the grooves tend to fill up naturally due to the flow of mud, and this tendency is greater as the mud is softer, so the amount of mud pressing is adjusted according to the softness of the mud. It is desirable to suppress disturbance of the mud surface or disturbance of seedling posture. Also, when the mud is hard, there is no mud flow as described above, so it is necessary to press a large amount of mud, but the harder the mud, the less mud escapes from the mulching tool, and the mulching tool tends to press a large amount of mud. Therefore, it is desirable to control mud surface disturbance or seedling posture disturbance by adjusting the amount of mud pressing depending on the hardness of the mud.

For this reason, the inventor of the present invention considered a method of replacing multiple types of mulch tools with different sizes or shapes of mud pressing surfaces depending on the hardness or softness of the mud. However, it was difficult to put it into practical use because it had the economical disadvantage of having to form multiple types of soil protection tools.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to make it possible to change and adjust the amount of mud pressing by the mulching tool with an economically superior structure through simple modification. be.

A characteristic configuration of the rice transplanter according to the present invention is that a driving force transmission mechanism for interlocking the soil gathering tool with the planting claw drive mechanism is pivotally connected at one end to the repetitive motion part of the planting claw drive mechanism. It is composed of a link configured to be able to freely reciprocate and a swinging arm fixed to the swinging support shaft, and a connecting portion between the other end of the link and the swinging arm is connected to the link and the swinging arm. By allowing the relative rocking of the link, the reciprocating motion of the link is converted and transmitted to the rocking motion of the rocking arm. The device is provided with a changing and adjusting means that can change and fix the connection position of the earth mower, and is configured to be able to change and adjust the driving and lowering range of the earth raising tool, and its effects are as follows.

In other words, (a) the earth-harvesting tool is driven using the drive system of the planting claws, so there is no need to provide any other dedicated drive path, and (b) the drive lowering range of the earth-harvesting tool can be changed and adjusted. In this way, it became possible to adjust the amount of mud pressing according to the hardness and softness of the mud, while using the same specifier.

(c) Also, since the change and adjustment is performed between the swinging arm fixed to the support shaft of the earth raising tool and the link, for example, even if multiple earth raising tools are installed on the support shaft, the change and adjustment of these earth raising tools cannot be made. This can be done simultaneously and while maintaining the same relative mounting posture.

Therefore, by the effects of (a) and (b), it is possible to adjust the amount of mud pressing according to the hardness and softness of the mud, and to prevent disturbances in the mud surface and seedling posture, in an economical and excellent manner by only having to form a single-specification soil gathering tool. In addition to being able to perform controlled and good planting work, due to the action of Ha,
This rice transplanter has the advantage of being able to easily and reliably simultaneously adjust the soil gathering tools, which are usually provided on both sides of the planting claw, and thus has resulted in a rice transplanter that can be used even better.

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

As shown in FIGS. 1 and 2, a pair of left and right propulsion wheels 1 that touch the ground on a hard surface are juxtaposed with an interval in the width direction of the fuselage, and each rear end side has a horizontal axis X.
The aircraft is structured so that it can move while supporting the aircraft by working together with three floats 2 that are pivotally supported around it so as to be able to swing up and down, and four pine-shaped seedlings W
A slanted seedling tray 3 is driven reciprocatingly in the widthwise direction of the fuselage with a constant stroke while the seedlings are placed side by side in the widthwise direction of the fuselage. Four planting claws 4 take out one seedling from the lower end of each pine-shaped seedling W and plant it in the field as the seedlings grow, and the four planting claws 4 are driven to reciprocate up and down in conjunction with the planting claws 4. A seedling planting device is provided at the rear of the fuselage, which is equipped with four soil gathering tools 5 that push the mud toward the planting seedling side as it descends. This is a four-row walking type rice transplanter that protrudes toward the ground and automatically plants four rows of seedlings in succession as the machine advances.

In order to drive the planting claws 4, as shown in FIGS. 2 and 3, three claw drive rotating shafts 12 are supported in the planting device drive transmission case 7, and A case 14 that supports the planting claw 4 is pivotally connected to a swing arm 15 and a crank arm 16 (repetitive motion part) attached to the rotating shaft 12 for driving the claw, so that the planting claw 4 can be moved up and down. It is configured to be driven in circulation. However, reference numeral 17 in the figure is a seedling pusher that operates to protrude toward the tip of the claw when the planting claw 4 reaches near the bottom dead center, and is connected to the claw support case 14.
It is installed so that it can be driven in and out.

In order to drive the soil gathering tool 5, the steps shown in FIGS.
As shown in the figure, by arranging a pair of soil gathering tools 5, 5 on both sides of the planting claw 4, a total of eight soil gathering tools 5 are each rotatably supported by the planting mechanism case 7. Each pair of swinging arms 19 are attached to the horizontal shaft 18 as a swinging support shaft for the book, and the swinging arms 19 are mounted to the horizontal shaft 18 so as to swing together.
An arm 20 is externally fitted to the tip of the crank arm 16 for each of the planting claws 4 so as to be non-rotatable relative to each other.
They are interlocked and connected via a link 21, so that the soil gathering tool 5 is interlocked with the planting claws 4 and driven to reciprocate up and down.

That is, the driving force transmission mechanism A for inputting the driving force of the soil gathering tool 5 from the drive system of the planting claw 4 also uses the swinging arm 19 and the link 21 which is pivotally connected to the crank arm 16. It constitutes.

Then, an arc-shaped elongated hole 22 centered on the horizontal axis 18 is formed in the swing arm 19, and a connecting pin 23 attached to the end of the link 21 so as to be relatively rotatable is inserted into the elongated hole 22. The connecting mechanism B is configured such that it can be fixed with a nut 24 in this state, thereby converting the reciprocating motion of the link 21 into the swinging motion of the swinging arm 19 and transmitting the same. and,
The long hole 22 and the connecting pin 23 of the connecting mechanism B
and a nut 24 that allows flexible position change and a structure that can be fixed at the changed position is a connecting pin 23 along the longitudinal direction of the elongated hole 22.
By adjusting the position, it constitutes a changing and adjusting means that can change and adjust the driving and lowering range of the earth mulching tool 5. However, it is possible to change and adjust the lowering range of the mulching tool 5 to the range where it floats from the mud surface.

5 and 6 show another embodiment of the present invention, in which the connecting pin 23 is inserted into the elongated hole 22 so as to be freely movable in the longitudinal direction, and is attached to the arm 19, and is held on the link 21 side. ball 25
A plurality of recesses 26 to be engaged are formed in the swing arm 19 along the elongated hole 22, and a spring 27 is further provided to bias the ball 25 toward the engagement side.
As a result, the connecting mechanism B is provided with a change adjustment means that can easily adjust the position of the connecting pin 23, and when an overload is applied to the earth raising tool 5 due to contact with a stone or the like, the ball 25 is automatically moved. It is also configured to automatically stop the driving of the mulch tool 5 when it is detached.

In addition, to constitute a means for changing and adjusting the driving lowering range of the earth gathering tool 5, the connecting pin 23 inserted into the elongated hole 22 is connected to the swing arm 19 using a lock pin.
It may be fixed to .

[Brief explanation of the drawing]

The drawings show an embodiment of the rice transplanter according to the present invention, in which Fig. 1 is a side view of the walking rice transplanter, Fig. 2 is a schematic front view of the mulch drive structure, Fig. 3 is a side view of the structure, FIG. 4 is a partially cutaway front view showing the attachment portion of the connecting pin, and FIGS. 5 and 6 are a side view and partially cutaway front view of another embodiment. 4... Planting nail, 5... Earth gathering tool, 16... Repetitive movement part, 18... Swinging shaft, 19... Swinging arm, 21... Link, A... Driving force transmission mechanism, B
...Connection mechanism.

Claims (1)

[Scope of utility model registration request] The soil gathering tool 5, which presses and moves the mud toward the planting seedling side as it descends, is able to swing up and down around the swinging shaft 18, and is driven up and down and back in conjunction with the drive mechanism of the planting claws 4. It is a rice transplanter set up like this,
A driving force transmission mechanism A for interlocking the soil gathering tool 5 with the drive mechanism of the planting claw 4 is configured to be reciprocally movable by having one end pivotally connected to the repetitive movement section 16 of the planting claw 4 drive mechanism. The structure is composed of a link 21 which is fixed to the swing support shaft 18, and a swing arm 19 fixed to the swing support shaft 18, and the other end of the link 21 and the swing arm 1
A connecting mechanism B that converts the reciprocating motion of the link 21 into a rocking motion of the rocking arm 19 and transmits it by allowing the relative rocking between the link 21 and the rocking arm 19 at the connecting portion B connected to the rocking arm 19. Further, the connection mechanism B includes a change adjustment means that can change and fix the connection position between the link 21 and the swing arm 19, and changes and adjusts the drive lowering range of the earth raising tool 5. A rice transplanter configured to allow