JPS6328304A - Walking type rice field working machine - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to walking-type paddy field working machines such as rice transplanters, seeding machines, and fertilizer spreaders.

[Problems to be solved by the prior art and the invention] In general, in this type of paddy field working machine, the machine body can be operated in a substantially constant manner with respect to the field by vertically raising and lowering the machine body of the traveling II axis that runs on the tiller. I try to maintain the same posture and even out the working depth. However, in this one,
In order to counter the running reaction force from the field during planting, for example, there is a special system that displaces the running wheels rearward when the running wheels move downward in the vertical movement range of the running wheels during planting work. This is disclosed in Publication No. 52-23928. However, this one has a mechanical problem.

When the traveling wheels are lowered far beyond the vertical movement range during planting work when the machine is rotating.

The rearward displacement of the running wheels is small and the machine descends almost vertically.As a result, the operator holding the operating handle has to support the machine with a large hand load, requiring great effort. In view of the above-mentioned circumstances, the present invention solves these drawbacks. It was devised for the purpose of providing a walk-behind paddy field work machine that can sweep in a single sweep, and the machine body is maintained in a substantially constant working posture with respect to a circular surface by vertical displacement of the running axle. In the walking-type paddy field work machine, the vertical movement mechanism of the running wheels is provided by a first chain case whose base end is pivotally supported on the machine body side, and a base end of which is provided on the distal end side of the first chain case so as to be bendable. Using a second chain case with a traveling axle attached to the side, the system is configured to displace the traveling wheels by a large amount of backward movement when the traveling wheels are moved further down beyond the range of vertical movement during paddy field work. It is characterized by this.

With this configuration, the present invention utilizes a bent chain case that can be bent at the intermediate portion, and when the traveling wheels are moved down beyond the paddy field work range, the traveling wheels are largely displaced backwards for one work. This makes it possible to greatly reduce the burden on the person's hands.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawing, 1 is a walking type rice transplanter;
The aircraft is equipped with an engine 2 in the front, and a seedling stand 3 with a low front and rear height at the rear. The method of scraping the planted seedlings and planting them on the rice field remains the same as before.

5 is a running axle, and the running axle 5 is a chain case (
(corresponding to the second chain case of the present invention) 6, the front end of the second chain case 6 is swingable (flexible) at the tip of the first chain case 7.
The bearing is mounted on the shaft.

The first chain case 7 is swingably supported on a support shaft 7a at the lower part of the transmission case 8, and the driving force from the engine is transmitted from the transmission case 8 to the first chain case 7 and the second chain case. 6
Power is transmitted to the running axle 5 through the drive axle 5 for running and rotation.

9 is a fulcrum shaft 10 provided on the body frame 1a side of the rice transplanter 1
is a swinging arm whose rear end is swingably supported by the swing arm 9, and the front end of the swing arm 9 is swingably supported at the intermediate part of the second chain case 6 via a pin shaft 6a. It is pivoted. A plurality of (two in total in the embodiment) engagement holes 11b are bored in the middle part of the swinging arm 9 (in the embodiment, a plate hanging from the arm body), and the swinging arm 9 has a plurality of engagement holes 11b. The connecting rod 11 is pivotally supported via the pin shaft 11a so as to be able to swing freely at the rear end of the connecting rod 11 so as to select one of the engagement holes 11b. Attach the support shaft 1 to the aircraft frame 1a.
The upper end portion of the actuating arm 12 is pivotably supported by a pin shaft 12b, and the upper end portion of the operating arm 12 is pivotably supported by a pin shaft 12b. Moreover, the upper end of this operating arm 12 is further interlocked and connected to the cylinder ring of the hydraulic cylinder 13. As the hydraulic cylinder 13 expands and contracts, the operating arm 12 swings.
The connecting rod 11 is pushed rearward and displaced, causing the swinging arm 9 to swing downward and rearward about the fulcrum shaft 10, and the second cheno case 6
As shown in FIG. 2, with the front end swinging around the support shaft 7a of the first chain case 7, the planting moves vertically and linearly within the range of vertical movement during work.

In the case of further downward movement beyond this point, the traveling axle 5 is set to be displaced by a larger backward movement amount as it moves downward. In Figure 1, 14 is a float and 15 is a driving handle.

In the embodiment configured as described above, when planting work is being carried out, the depth detection of the tiller (for example, the float 14
The hydraulic cylinder 13 expands and contracts to cause the operating arm 13 to swing (detected by ground pressure received by In this way, the traveling wheels 5 are moved linearly in the vertical and vertical directions, and the planting operation is accomplished. Therefore, this product has the advantage that even if the tiller is uneven and the running wheels 5 are vertically displaced during planting, the longitudinal balance of the machine remains almost constant without changing. This will contribute to improvement.

When such one-stroke planting operation is completed, it is necessary to rotate the aircraft in order to perform the first-stroke work, but in this case,
The traveling axle 5 is moved further down beyond the range of downward movement necessary for the planting work, and the machine body is lifted from the circular surface. In other words, if the float 14 remains in contact with the ground while the machine is rotating, the field will be disturbed by the mud pushing action of the float 14, and this will have a negative impact on the already planted seedlings. 1
It becomes necessary to lift the machine body 4 from the field surface, and then the traveling axle 5 is moved further down beyond the range of vertical movement necessary for planting work, and the machine body is lifted from the circular surface. In this case, in the present invention, the bending action of the first chain case 7 and the second chain case 6 (the angle formed by both the chain cases 6.7 increases so as to approach the horizontal) and the swinging motion of the swing arm 9 , the running wheels 5 move from the above-mentioned linear up and down movement,
If the aircraft moves with a large displacement backward, and therefore lifts from the circular surface, that is, the float 14
With the machine floating above the rice field, the center of gravity of the aircraft will be displaced forward with respect to the traveling vehicle @5. For this reason, the aircraft, which is set to the rear balance state to maintain the aircraft balance during planting work, changes to the front balance state, and as a result, the load on hand when lifting the aircraft, including the float, is reduced during the planting operation. Therefore, the operator can sufficiently support the operator by simply holding the operating handle with a small amount of force, and the maneuverability of the machine is significantly improved, greatly reducing the work burden on the operator.

It should be noted that the present invention is of course not limited to the above-mentioned embodiments, and the means for ensuring a large backward movement amount of the traveling wheels 5 when the traveling wheels 5 are lowered when one aircraft is traveling is as follows. For example, it can be constructed as a bent chain case as shown in Figs. 4 to 6.
Any of these may be used.

[Operations and Effects] In summary, since the present invention is constructed as described above, when the traveling wheels are moved further down beyond the range of vertical motion when working in paddy fields when the machine is rotating, the traveling axle will The machine will be displaced backwards with a large amount of movement, so when one machine is lifted from the rice field and rotated, the machine will be in a forward balance state. Therefore, the hand load of the machine will be small, and the operator will have to apply only a small amount of force. This means that the machine can be supported simply by holding the operating handle, and moreover, the machine's maneuverability is significantly improved, and the work burden on each worker is greatly reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the walking type paddy field work machine according to the present invention, and FIG. 1 is a side view of the walking type rice transplanter, and FIG.
The figure is an enlarged side view of the main part, Fig. 3 is an enlarged plan view of the main part, Fig. 4 is a side view of the walking rice transplanter on the other side, Fig. 5 is an enlarged side view of the main part of the same as above, and Fig. 6 is the main part of the same as above. FIG. In the figure, 1 is a rice transplanter, 5 is a running wheel, 6 is a second chain case, 7 is a first chain case, and 9 is a swing arm. Patent applicant: Mitsubishi Agricultural Machinery Co., Ltd. Procedural amendment 0.
a. October 2, 1986

Claims (1)

[Claims] In a walk-behind paddy field work machine that maintains the machine body in a substantially constant working posture with respect to the field surface by vertical displacement of the running wheels, the base end of the vertical movement mechanism of the running wheels is pivoted on the machine body side. The first chain case is provided with a bendable proximal end on the distal end side of the first chain case, and the running wheel is mounted on the distal end side of the first chain case. A walking paddy field working machine characterized by having a configuration in which the running wheels are displaced by a large amount of backward movement when the moving wheels are moved further down beyond the range of motion.