JPH0119843B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a riding rice transplanter which is equipped with a rice transplanter that can be raised and lowered via a lift mechanism at the rear of a passenger vehicle body. This invention relates to an improvement of a rolling lock device for a work machine.

[Prior art]

In such a riding type rice transplanter, the rice transplanting machine is connected to a lift mechanism on the side of the passenger vehicle so that it can roll, and the rice transplanting machine rolls from side to side as appropriate to deal with unevenness, undulations, etc. of the rice field to ensure good seedling planting. It is now possible to do it. On the other hand, such a rolling device is equipped with a rolling lock device, and when the rice transplanting machine is lifted and travels or turns, the rice transplanting machine is fixed to prevent it from rolling.

[Technical problem of the present invention]

By the way, conventional rolling lock devices involve inserting a lock pin between the rolling box and the rolling shaft or suspending the rice transplanting machine with a chain, which is cumbersome to operate or requires the chain to be removed when lifting the rice transplanting machine. With conventional models that are suspended by a chain, there are problems such as the rice transplanter shaking from side to side until the chains are tensioned, causing the seedlings in the seedling tank of the rice transplanter to shrink or become lopsided due to the impact of the vibrations. Ta.

[Object of the present invention]

The present invention relates to an improvement of the above-mentioned rolling lock device, in which a rice-transplanting machine is connected to the rear part of a passenger vehicle body via a lift mechanism and a rolling support frame so as to be able to rise and fall and roll freely. By simply installing a spring body between the machine frame and the end of the lift mechanism, the rice transplanter can roll freely in the planting state, and when the rice transplanter is raised, the spring body is tensioned. To provide a riding type rice transplanter having a rolling lock device which is improved so that the rolling is controlled slowly and smoothly in the rising stage and the rice transplanting machine can be automatically locked.

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

[Configuration of the first embodiment] In the first embodiment of the present invention shown in FIG. has been done. In the passenger vehicle body 1, an engine stand 5 is horizontally protruded in front of a transmission case 4 which also serves as a frame, and an engine 6 is mounted on the engine stand 5.
A front wheel 7 is provided below. Further, a transmission case 8 extends rearward and diagonally downward from both rear sides of the transmission case 4, and a rear wheel 9 is provided at the tip of the transmission case 8. Mission case 4,
The upper part of the transmission case 8 is a driver's seat 10,
In addition to having a handle 11 and various operating levers 12, there is also a seat mounting frame 13 erected at the rear end of the mission case, and an auxiliary frame 14 projecting diagonally forward from the seat mounting frame 14 in a substantially Y shape. A seat 15 is placed. After the power from the engine 6 is input to the transmission case 4 through the belt transmission means 16, it is transmitted to the rear wheels 9 through the chain of the transmission case 8, etc., and the vehicle is driven by operation from the driver's seat 10. Such power is further transmitted to the rice transplanting machine 3.

The lift mechanism 2 has two lower links 17 and one upper link 18, and the two lower links 1
One end of the seat mounting frame 7 is pivoted to a lower position of both side walls of the seat mounting frame 13 in a gate shape, and the other end is pivoted to the rolling support frame 19. Further, a lift arm 20 is swingably installed inside and above the seat mounting frame 13, and a strut 1 that stands between the upper end of the lift arm 20 and the rolling support frame 19 is connected to the upper end of the lift arm 20.
An upper link 18 is installed parallel to the lower link 17 between the upper link 9a and the lower link 17. On the other hand, a hydraulic cylinder 21 is installed horizontally at the bottom of the seat mounting frame 13 on the side of the passenger vehicle body 1, and its piston 22
The tip of the piston 22 is in contact with the lift arm 20, and as the piston 22 expands and contracts, the lift arm 20 is swung, and the rolling support frame 19 is moved together with the links 17 and 18.
It is designed to swing up and down. A spring 23 is tensioned diagonally between the upper part of the seat mounting frame on the side of the passenger vehicle body 1 and the rolling support frame side of the lower link 17, so as to promote the upward movement of the links 17, 18, etc. There is.

The rice transplanting machine 3 has a machine frame 24 connected to the rolling support frame 19 so as to be able to roll freely, and a seedling tank 25 on the machine frame 24.
is installed so that it can move back and forth in the left-right direction with its upper part tilted toward the passenger vehicle body. Airframe frame 2
A float 26 is attached below the seedling tank 25, and a planting body 27 is arranged opposite to the lower opening side of the seedling tank 25. By reciprocating the planting body 27 in the vertical direction, seedlings are removed from the seedling tank 25. Individual plants are cut out and planted in fields.

Furthermore, in the lift mechanism 2, the rear part of the upper link 18 projects rearward from the pivot point A of the rolling support frame 19 with the strut 19a.
Such a rear protrusion 18a of the upper link 18
points diagonally upward when the lift mechanism 2 is ascending, and diagonally downwards when descending, and this protrusion 18a and the body frame 2 of the rice transplanting machine 3
The left and right sides of 4 are connected by a spring body 28.

[Operation of the first embodiment] Since the present invention is configured as described above, the links 17 and 18 of the lift mechanism 2 swing downward as shown by the solid line in FIG. 1 during the rice transplanting operation. Machine 3
is in the lowered position, the rear protrusion 18a of the upper link 18 faces diagonally downward, and the rear protrusion 1
The distance between 8a and the fuselage frame 24 becomes narrower. Therefore, the spring body 28 interposed between the two is loosened and the rice transplanting machine 3 is no longer restrained, and thus the rice transplanting machine 3 can plant seedlings while freely rolling according to the rice field surface. It becomes possible.

Next, when the rice transplanter turns or runs on the road, the links 17 and 18 of the lift mechanism 2 are swung upward as shown by the two-dot chain line in the figure to raise the rice transplanter 3, and the upper link 18 The rear protruding portion 18a of the rear projection 18a is directed diagonally upward from the state of facing diagonally downward to widen the distance from the body frame 24. Therefore, the spring body 28 is sequentially pulled and tensed, and when the rice transplanting machine 3 reaches the uppermost position, the spring body 28
The tension force of 8 supports the fuselage frame 24 from both sides and locks it against rolling.

[Configuration of Second Embodiment] According to the second embodiment of the present invention shown in FIGS. 2 and 3, in the lift mechanism 2, a long hole 2 is provided in the vertical direction at the tip of the strut 19a of the rolling support frame 19.
9 is formed, and the upper link 18 is inserted into this elongated hole 29.
A pin 30 is loosely fitted so that the pivot position of the upper link 18 relative to the strut 19a can be freely changed up and down.

[Operation of the second embodiment] As a result, when rice transplanting work is performed with the rice transplanting work machine 3 in the lowered position, the pin 30 moves freely within the elongated hole 29, and the spring body 28 as well as the upper link 18 are free. As a result, problems such as compressing and restraining the spring body 28 are avoided. Therefore, the rice transplanting machine 3 can roll more easily than the first embodiment. In addition, when the rice transplanter 3 is raised,
The pin 30 is located above and below the elongated hole 29 and the spring body 28
The rolling of the rice transplanting work machine 3 is locked by tensioning the rice transplanter 3.

[Effects of the present invention]

As explained above, according to the present invention, the end side of the lift mechanism 2 and the body frame 24 of the rice transplanting machine 3
The spring body 28 is stretched between the rice-transplanting machine and the rice-transplanting machine so that it is relaxed when it is in the lowered position of the planting state, and is tensed when it is raised. In this state, the rice transplanting machine can be rolled freely and good rice transplanting work can be performed, and when rising, the spring body 28 gradually becomes tense and the rolling can be automatically and smoothly regulated to a locked state. The seedlings in the seedling tank are held without being subjected to shock from side to side.
This can prevent damage to seedlings and shrinkage of the seedbed. Moreover, the structure is simple, lightweight, and can be provided at low cost.

[Brief explanation of drawings]

FIG. 1 is a side view showing a first embodiment of a riding rice transplanter according to the present invention, FIG. 2 is a side view showing the second embodiment, and FIG. 3 is a perspective view of the main parts thereof. DESCRIPTION OF SYMBOLS 1... Passenger vehicle body, 2... Lift mechanism, 3... Rice transplanting machine, 17, 18... Link, 18a... Rear protrusion part,
19...Rolling support frame, 19a...Strut,
24... Airframe frame, 28... Spring body, 29... Long hole, 30... Pin.

Claims (1)

[Claims] 1. A rice transplanting machine can be raised and lowered and rolled freely through a lift mechanism which is pivoted at one end to the rear of the passenger vehicle body and moves up and down, and a rolling support frame which is pivotally connected to the other end of the lift mechanism. A spring body is connected between the body frame of the rice-transplanting machine and the end side of the lift mechanism, and is loosened when the rice-transplanting machine is in the lowered position in the planting state, and becomes tense when raised. A riding-type rice transplanter characterized by being stretched like this.