JPS6142521B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a riding-type rice transplanter in which a rice-transplanting machine is supported on the rear part of a passenger vehicle via a link mechanism so that it can be raised and lowered and can roll freely. This invention relates to a riding-type rice transplanter that has been improved so that rolling is restricted when the rice transplanter is raised, and the rice transplanter can be stably raised and lowered.

In this type of riding type rice transplanter, a rice transplanting machine is usually connected to the rear part of the passenger vehicle body via a link mechanism so that it can move up and down and roll. It is also known that rolling locks when the rice transplanting machine is lifted up, but all conventional machines have a structure that restricts rolling at the front side of the link mechanism (connection part on the passenger vehicle body side), so rice transplanting work When lifting the machine, the lateral rocking load caused by the rolling of the rice transplanting machine is applied to the mounting base of the link mechanism on the passenger vehicle body side, so the strength of the link mechanism itself needs to be extremely high. In particular, in the conventional model, the rolling lock is performed at the end of lifting of the rice transplanter, and the link mechanism swings left and right even during lifting, and the tilt is forcibly restored and rotated at the time of lifting. Since the structure is such that the rolling is locked, there is a drawback that the rattling portion of the link mechanism causes large left-right rotation and vibration, making it difficult to accurately lock the low link.

In addition, if the rolling mechanism is configured to be locked from the driver's seat of the passenger vehicle after the rice transplanting machine has finished rising, it is necessary to lock the rolling mechanism and release the lock when lowering the rice transplanting machine. It was also difficult to operate.

The present invention was made in view of these circumstances, and when the rice transplanting machine is raised by the link mechanism,
Utilizing the upward movement of the link mechanism, a rolling prevention member provided between the link mechanism and the rice transplanting machine is activated to automatically lock the rice transplanting machine,
To provide a riding-type rice transplanter improved so that the rolling load of a rice transplanting work machine on a link mechanism is reduced, so that the strength of the link mechanism does not need to be increased too much, and the operation of locking or releasing the rolling is not required. This is what I am trying to do.

For this purpose, the present invention provides for the rear part of the passenger vehicle body to
The base ends of both links of a link mechanism consisting of an upper link and a lower link are rotatably supported, and the rice transplanting machine is rolled via a rolling mechanism to a connecting body pivoted at the tips of both links. The rice-transplanting machine is configured to be freely pivotable and movable up and down via the link mechanism by the expansion and contraction movement of a hydraulic cylinder, and is integrated on the rear side of the pivot point between the upper link and the connecting body. By displacing the rear extension part of the upper link upward between the rear extension member of the upper link extending to A rolling mechanism that connects the rice transplanting machine by pulling up parts that are far from the center of rolling to the left and right, and by displacing the parts downward to release the lifting. A prevention mechanism is provided, and when the rice transplanter is moved upward by the former link mechanism, the interlocking member is used to pull up parts of the rice transplanter that are left and right away from the center of rolling to prevent rolling, and conversely, when the rice transplanter is moved downward, it is pulled up. The device is characterized in that it is configured so that it can be rolled by releasing it.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

In the figure, reference numeral 1 denotes a passenger vehicle body, and a rice transplanting machine 3 is connected to the rear of the passenger vehicle body 1 via a link mechanism 2. The passenger vehicle body 1 has a front wheel 5 and a rear wheel 6 at the front and rear of a transmission case 15 which also serves as a frame, and an engine stand 4 is horizontally protruded in front of the transmission case 15, on which an engine 7 is mounted. A driver's seat 8 is installed behind the vehicle, and is equipped with a handle 9 and various operating levers 10, and a seat 11 is provided on a support frame 12. The rear wheel 6 is the transmission case 15.
The left and right transmission cases 13 are attached to the free ends of the transmission cases 13 that extend rearward and diagonally downward from both rear sides of the transmission cases 13 to which the rear wheels 6 are attached.
is formed in a gate shape relative to the transmission case 15, and a space is formed between the left and right rear wheels 6. After the power from the engine 7 is input to the transmission mechanism in the transmission case 15 via the belt transmission means 14, it is transmitted to the rear wheels 6 via the transmission case 13, and is transmitted to the rice planting work via the propeller shaft. The signal is now being transmitted to aircraft 3.

In this embodiment, the link mechanism 2 includes two left and right lower links 16, and an upper link 20 made of one leaf spring arranged above the lower links 16.
One end of the two lower links 16 is pivotally supported at the lower part of the seat support frame 12 at the rear of the passenger vehicle body 1, and the other end of the lower link 16 is connected to a rolling box disposed at the front of the rice transplanting machine 3. It is supported by 17. Furthermore, a lift arm 18 is installed approximately vertically inside the seat support frame 12 with its upper portion rotatably supported by a pin 19.
An upper link 20 is installed substantially parallel to the lower link 16 between the upper end of the lift arm 18 and the upper end of the strut 17a erected on the rolling box 17. Furthermore, a piston 22 of a hydraulic cylinder 21 is connected to the lower part of the lift arm 18 to rotate the lift arm 18, and a spring 23 is disposed diagonally between the rolling box 17 side of the lower link 16 and the upper part of the seat support frame 12. The lower link 16 is tensioned to apply a spring force in a direction to rotate the lower link 16 upward.

Furthermore, at the connecting portion between the upper link 20 and the strut 17a on the rolling box 17 side, a vertically long long hole 24 is bored in the upper part of the strut 17a. One end of the link 20 is connected so that it can be moved up and down. This pin 25 has
A chain hook 26 is provided which is integrally attached to the upper link 20 and extends rearward from the position of the pin 25, and the chain hook 26 is connected to both the left and right sides of the rice transplanting machine 3 in a figure-eight shape when viewed from the rear to prevent rolling. The base of a chain 27 as an interlocking member is tied together.

The rice transplanting machine 3 is connected in a rolling manner by inserting the rolling pin 29 at the front of the body frame 28 into the hole 30 of the rolling box 17 connected to the rear end of the link mechanism 2 so as to prevent it from coming off. A seedling tank 31 is installed on the body frame 28 so as to be movable back and forth in the left-right direction with its upper end inclined toward the passenger vehicle body. Further, a float 32 is attached below the fuselage frame 28,
A planting body 33 is disposed opposite to the lower seedling outlet side of the seedling tank 31, and by vertically reciprocating movement of the planting body 33, seedlings are cut out one by one from the seedling tank 31 and planted on the rice field. There is.

Since the present invention is configured as described above, when the piston 22 of the hydraulic cylinder 21 connected to the link mechanism 2 is moved backward during rice transplanting work, the upper link 20 is moved downward together with the lower link 16 due to the load of the rice transplanting machine 3. The rice transplanting work machine 3 comes to descend. Therefore, when the rice transplanting machine 3 is supported at a predetermined lowered position and towed by the passenger vehicle body 1, the float 32 slides on the rice field surface and the planting body 33 is operated, so that the seedlings in the seedling tank 31 are planted.

By the way, at this time, the upper link 20 receives almost no load from the rice transplanting machine 3, and the pin 2
5 is located in the middle of the elongated hole 24, so that the chain 27 for preventing rolling becomes slack. Therefore, the rice transplanting machine 3 can be rolled freely without being restricted in any way.

Next, when the machine turns at the edge of the field, the piston 22 of the hydraulic cylinder 21 is projected in the link mechanism 2 due to the lifting operation and the lift arm 18 is rotated, so that the upper link 20 is bent in a chevron shape and rotates upward. The lower link 16 also rotates upward due to the rotational force of the upper link 20 and the spring force of the spring 23, and the rice transplanting machine 3 rises. In this rising process, the pin 25 moves upward in the elongated hole 24 due to the rotation of the upper link 20 and comes to be located at the upper end thereof, whereby the chain hook 26 is pulled up and the anti-rolling chain 27 is moved upward. get nervous. Therefore, the rice transplanting machine 3 is unable to move from side to side due to this tensioned chain 27, and rolling of the rice transplanting machine 3 is automatically locked during the rising process.

As described above, according to the present invention, the rolling prevention mechanism is operated in conjunction with the rising action of the link mechanism and has an 8-shaped shape when viewed from the rear, so that when the rice transplanter is descending, the rolling prevention mechanism is in a free state. During the process of raising the rice transplanter, the rolling prevention mechanism is automatically activated and the left and right sides of the rice transplanter are attracted to the upper link side, locking the rice transplanter from rolling. This eliminates the need for special operations like in the past, and the link mechanism is not subject to the side-to-side rocking force caused by the rolling of the rice transplanter, so the link mechanism does not have much strength from a structural standpoint. Since rolling is automatically and reliably locked and unlocked, stable running performance and seedling planting performance can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a riding rice transplanter according to the present invention, and FIG. 2 is a perspective view of the main parts. 1...Passenger vehicle body, 2...Lift mechanism, 3...Rice transplanting machine, 12...Seat mounting frame, 16
...Bottom link, 17...Rolling box,
18... Lift arm, 20... Upper link, 2
1... Hydraulic cylinder, 23... Spring, 24... Long hole, 25... Pin, 26... Chain hook, 2
7...Chain.

Claims (1)

[Claims] 1. The base ends of both links of a link mechanism consisting of an upper link and a lower link are rotatably supported at the rear of the passenger vehicle body, and a rolling mechanism is attached to a connecting body that is pivotally supported at the distal ends of both links. The rice-transplanting machine is pivotally connected to enable rolling through the link mechanism, and the rice-transplanting machine is configured to be movable up and down through the link mechanism by the expansion and contraction movement of a hydraulic cylinder device. The rear extension part of the upper link is located between the rear extension member of the upper link that integrally extends to the rear side of the upper link, and the part on the machine frame side of the rice transplanter that is left and right away from the center of rolling. By displacing upward, the parts of the rice transplanting machine side away from the rolling center are pulled up to the left and right,
On the other hand, an interlocking member that releases the lifting by displacing downward is provided so as to have a V-shape when viewed from the rear, and a rolling prevention mechanism is provided to connect the two, and the rice transplanting machine is moved upward by the linkage mechanism. A riding type rice transplanter in which the interlocking member pulls up parts of the rice transplanting work machine that are far from the rolling center to the left and right to prevent rolling, and conversely, when moving downward, releases the pulling to enable rolling. Machine.