JPS598495Y2 - rice transplanter - Google Patents

Description

[Detailed description of the invention] The present invention connects the traveling body and the seedling planting device with a pair of upper and lower links, and also provides a drive device for raising and lowering the seedling planting device, so that the seedling planting device can be raised and lowered. Concerning the rice transplanter that was developed.

This type of rice transplanter is suitable for changing the position of the seedling planting device up and down in accordance with the depth of the tiller, and maintaining that position to perform seedling planting work at approximately the appropriate planting depth. Since the relative height position between the traveling machine and the seedling planting device is set to be constant, the machine's attitude may unexpectedly change during seedling planting, such as when the traveling wheels fall into a recess in the tiller. In this case, the attitude of the seedling planting device changes accordingly, which may result in problems such as disturbances in the seedling planting depth and seedling planting posture.

As a means to eliminate this inconvenience, a flexible connection structure using pins and long holes is adopted at the connection point between the link mechanism extending from the fuselage side and the seedling planting device, and the posture of the aircraft is adjusted. It may be possible to configure the system so that the changes do not directly affect the seedling planting device, but simply providing such a flexible mechanism will prevent the above-mentioned changes in the aircraft attitude from directly affecting the seedling planting device. Although it is effective in avoiding the effect of changing the posture of the seedlings on the soil, the posture of the seedling planting device on the ground often changes depending on local minute irregularities in the mud surface or changes in the amount of seedlings placed. , a new inconvenience in which the attitude of the seedling planting device relative to the ground becomes unstable cannot be avoided.

The present invention solves the problems that the conventional device described above could not solve, and although it is equipped with a lifting device and can freely change the height of the seedling planting device relative to the aircraft, it does not prevent unexpected changes in the aircraft's attitude. ′
To provide a rice transplanter that can avoid transmitting the adverse effects of the change in posture to a seedling planting device when the seedling planting device changes, and can stably maintain the posture of the seedling planting device running on a mud surface. There is a purpose to what you do.

The characteristic structure of the rice transplanter according to the present invention is that the traveling body and the seedling planting device are connected via a coupling mechanism having a pair of upper and lower links, and a drive mechanism for raising and lowering the seedling planting device is provided. The rice transplanter is configured such that the vertical position of the seedling planting device can be changed freely, and the connecting mechanism includes an extending end of one link extending from the traveling body side and the seedling planting device. A flexibility mechanism is provided that allows the position of the pivot connection point with the device to change within a certain range along the length direction of the link, and the flexibility mechanism portion is provided with a flexibility mechanism that allows the position of the pivot connection point to change within a certain range along the length direction of the link. The main feature is that a projectile is provided that biases the aircraft body in a direction that restricts it to a certain position, and this arrangement produces the following effects.

In other words, by providing a coupling mechanism with a pair of upper and lower links and a lifting mechanism for the seedling planting device, the height of the seedling planting device relative to the machine body can be set freely, and the depth of the plowing plate can be set to a shallow depth. Although it is possible to select an appropriate planting depth regardless of the depth, in the connection mechanism part, the pivot connection point between the extending end of the link and the seedling planting device is limited to the length of the link. Since it is equipped with a flexible mechanism that allows the position to change within a certain range along the direction, even though the height of the seedling planting device relative to the machine is set at a certain level, the unevenness of the tiller Even if the attitude of the aircraft unexpectedly changes due to a wheel falling down or running over a part, the change in attitude can be absorbed to some extent by the accommodation mechanism part, and the advantage is obtained that the attitude of the seedling planting device is not disturbed significantly. It is something.

Furthermore, although the flexibility mechanism is provided in the connection mechanism between the body and the seedling planting device as described above, the flexibility mechanism also includes a link between the extending end of the link and the seedling planting device. A bullet is installed that biases the support connection point in a direction that restricts it to a fixed position relative to the machine body, so the biasing force of this bullet can be applied to minute irregularities on the mud surface or the seedlings of the seedling planting device. It acts as an acting force to suppress changes in the running posture of the seedling planting device on the mud surface due to changes in the amount of seedlings placed on the table, etc., and stably maintains the running posture of the seedling planting device on the mud surface. There are benefits to be gained.

Embodiments of the present invention will be described below with reference to the drawings.

At the rear of a tractor 5, which is an example of a traveling machine, the wheels 1, 1 are mounted on the front and rear wheels, the control section 2 is arranged at the rear, and the spare seedling storage sections 4 are provided on both sides of the bonnet 3. The seedling planting device 6 is connected to a connecting mechanism 2 that includes a pair of upper and lower links 7 and 8.
3, the tractor 5 is pivotally connected so as to be able to rise and fall freely, and a transmission shaft (not shown) of a seedling planting device 6 is interlocked and connected to a power take-off shaft (not shown) protruding from the rear of the tractor 5. 5
The vehicle is configured to transmit power from the engine E mounted on the vehicle to a seedling planting device 6, and a riding type rice transplanting machine is configured to plant seedlings in the rice field as the vehicle travels.

? Connect the lower link 8 and the lift arm 9 with the rod 1
0, and is configured to drive and oscillate via a drive mechanism 11 constituted by this lift arm 9 and a hydraulic cylinder that operates the lift arm 9, and drives the seedling planting device 6. It is configured to change between a working position in which it is raised and lowered to touch the ground and a non-working position in which it is raised upwards, and the seedling platform 12 of the seedling planting device 6 is raised and the tractor 5 is moved in the raised position.
It is designed to rotate as you approach the side.

The upper link 7 has a turnbuckle 13 in the middle thereof.
When adjusting the amount of descent of the seedling planting device 6 relative to the tractor 5 depending on the soil quality of the rice field, the length of the link 7 can be changed and the seedling planting device 6 can be The structure is designed to absorb tilting relative to the ground and to maintain a nearly constant planting posture relative to the ground.

To connect the upper link 7 to the bracket 14.14 projecting from the rear of the tractor 5, insert the pivot pin 15 connected to the tip of the link 7 into the elongated holes 16, 16 drilled in the bracket L-14.14. engaging and compressing spring 17
The pivot pin 15 is biased away from the tractor 5 via the This rotation is restricted by the biasing force of the compression spring 17.

In other words, the connection mechanism 23 includes a pair of upper and lower links 7, 8.
The pivot pin 15 at the tip of the link, the elongated holes 16, 16 into which the pivot pin 15 is inserted, the bracket 14 in which the elongated holes 16, 16 are formed, and the elongated hole 16.16. The long hole 16.16 is connected to the pivot point P between the extending end of the upper link 7 and the seedling planting device 6. 7, and the compression spring 17 constitutes an elastic mechanism that restricts the position of the pivot connection point P to a constant position with respect to the body. are doing.

A midway point of an L-shaped lever 19 is pivotally connected to a rear hitch 18 that connects the lower link 8 so as to be swingable around the horizontal axis, and a long hole 20 is bored at one end of the lever 19. While engaging the pivot pin 15 in the elongated hole 20, the lever 1
A rod 21 is pivotally connected to the other end of the rod 9.
The bracket 2 is rotatably attached to the lift arm 9.
2 is slidably connected only over a predetermined range, so that when the rift 1 arm 9 is swung upward by a predetermined angle or more when the seedling planting device 6 is raised, the lever 19 Forcibly swing the pivot pin 15 to the spring 1
7 forcibly approaches the tractor 5 side, the seedling planting device 6 is rotated further in the raised state, and the seedling platform 12 is
The fulcrum position is automatically and reversibly changed so that the fulcrum position is lower and closer to the control section 2.

A hydraulic cylinder 11 is used to drive the seedling planting device 6 up and down.
However, various mechanisms such as a hydraulic motor can be employed, and these mechanisms are collectively referred to as the drive mechanism 11.

[Brief explanation of the drawing]

The drawings show an embodiment of the rice transplanter according to the present invention, and FIG. 1 is an overall side view, FIG. 2 is a side view of the main part, and FIG. 3 is a partially cutaway plan view of the main part. 5... Traveling machine, 6... Seedling planting device,
7, 8...link, 11...drive mechanism, 16...accommodation mechanism, 17...ammunition machine,
23...Connection mechanism, P...Pivot connection point.

Claims (1)

[Scope of utility model registration request] The traveling body 5 and the seedling planting device 6 are connected by a pair of upper and lower links 7,
This rice transplanter is connected via a coupling mechanism 8 with a drive mechanism 11 for raising and lowering the seedling planting device 6, so that the vertical position of the seedling planting device 6 can be changed freely. The connection mechanism 23 has a pivot point P between the extending end of one link 7 extending from the traveling body 5 side and the seedling planting device 6 along the length direction of the link 7. A flexible mechanism 16.16 is provided that allows the position to change within a certain range, and the flexible mechanism 16.16 is provided with a flexible mechanism 16.16 that regulates the position of the pivot connection point P to a fixed position with respect to the traveling body 5. A rice transplanter characterized in that it is provided with a bullet 17 that is biased in the direction of the rice transplanter.