JPS6360964B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a pitting sensitivity adjustment device for a riding rice transplanter, and in particular, a sensitivity switching mechanism of a sensing mechanism that senses the vertical movement of a float and moves a rice transplanting machine up and down, and a surface pressure adjustment mechanism by pitching the float are linked. , relates to an adjusting device that operates both mechanisms simultaneously.

[Conventional technology]

A well-known riding rice transplanter is equipped with a lift mechanism that moves up and down with a hydraulic cylinder at the rear of the traveling vehicle body, and a rice transplanting machine with a float is attached to this lift mechanism.
A sensing mechanism is provided that senses the vertical movement of the float and expands and contracts the hydraulic cylinder to move the rice transplanting machine up and down during planting work using the rice-transplanting machine. Some have a sensitivity switching mechanism on the side. Then, the sensitivity switching mechanism is adjusted depending on the hardness or softness of the field surface on which the seedlings are to be planted, and the sensing mechanism is operated appropriately according to the condition of the field surface, allowing highly accurate planting work with a constant planting depth. That's what I do.

[Problems to be solved by the invention]

On the other hand, when the rice transplanting machine is pitted via a lift mechanism, it is desirable to increase the surface pressure of the float when the rice field is hard, and to weaken and reduce the surface pressure of the float when the rice field is soft.

[Means to solve the problem]

The present invention has been made in view of the above circumstances, and includes a surface pressure adjustment mechanism that switches the surface pressure of the float from the traveling vehicle body side to strong or weak in the pitching support mechanism provided in the lift mechanism. By configuring the sensitivity switching mechanism to work in conjunction with each other, both mechanisms can be appropriately switched at the same time depending on the hardness or softness of the rice field, thereby enabling highly accurate planting work to be performed in a riding rice transplanter. It provides:

【Example】

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In the figure, numeral 1 is a four-wheeled vehicle body,
A lift mechanism 3 consisting of a parallel link that moves up and down as a hydraulic cylinder 2 expands and contracts is provided at the rear of the traveling vehicle body 1 . A rice transplanting machine 4 is attached to the rear of the lift mechanism 3 so as to be pitchable within a predetermined range. The rice transplanting machine 4 includes a forward-inclined seedling tank 5, a planting body 6 for taking out seedlings one by one from the lower part of the seedling tank 5 and planting them on the rice field, a center float 7, a side float 8, etc. A sensing mechanism 9 is provided at the front of the rice transplanter 7 to sense vertical movement of the center float 7 when the rice transplanting machine 4 is in the process of planting seedlings. In the sensing mechanism 9, the center float 7 has its rear pivot 7a pivotally supported on the main body 4a of the rice transplanting machine 4 so as to be rotatable back and forth, and is moved up and down by attaching a link 7b provided at the front to the main body 4a. is connected to a valve 10 for switching the oil passage of the hydraulic cylinder 2 by an operating wire 9a. On the other hand, a spring 12 is provided on the side of the driver's seat 11 of the traveling vehicle body 1 to increase the switching speed of the valve 10.
In other words, a sensitivity switching lever 13 is provided that switches the switching speed to two stages: sensitive and slow, that is, insensitive. Further, a spring 14 is installed at the rear end of the lift mechanism 3 at a position where the rice transplanting work machine 4 pitches.
is attached to the spring 14, and an operating wire 15 is attached to the spring 14.
One end is attached, and the other end is attached to the sensitivity switching lever 13, forming a surface pressure adjustment mechanism for the floats 7 and 8 by pitching. In the riding-type rice transplanter thus configured, when planting seedlings, if the rice field on which the planting work is to be done is hard, the sensitivity switching lever 13 is set to be tilted forward as shown by the solid line in the drawing. Then, the switching speed of the valve 10 slows down due to the action of the spring 12 and becomes insensitive, and when the center float 7 slides on the rice field, the sensing mechanism 9 detects the vertical movement of the center float 7, which causes the hydraulic cylinder 2 to expand and contract.
That is, the reaction of the rice transplanting machine 4 moving up and down via the lift mechanism 3 becomes slow. Further, since the tension of the spring 14 is weakened, the sensitivity of the lift mechanism is improved, and it responds sensitively to the up and down of the rice field. Then, floats 7 and 8 increase the surface pressure on the rice field,
Planting work is performed in which the planting depth of seedlings planted by a planting body 6 is made almost constant with good followability. If the field surface on which you are planting seedlings is soft,
Set the sensitivity switching lever 13 so that it is tilted toward the rear as shown by the imaginary line in the drawing. Then,
Contrary to the above case, the switching speed of the valve 10 becomes faster and more sensitive, and the sensitivity of sensing the vertical movement of the center float 7 to extend and retract the hydraulic cylinder 2 by the sensing mechanism 9 becomes more sensitive, and the lift mechanism 3 becomes more sensitive.
The rice transplanting machine 4 is quickly moved up and down via the. Further, the tension of the spring 14 becomes stronger, the pitching becomes less sensitive, and the response to the up and down of the field becomes slower. The surface pressure of the floats 7 and 8 on the rice field surface is reduced, and the seedlings are planted at a substantially constant depth by the planting body 6 without unnecessarily sinking into the soft rice field surface.

【Effect of the invention】

As described above, the pitching sensitivity adjustment device for a riding-type rice transplanter of the present invention includes a sensitivity switching mechanism that switches the sensitivity of vertically moving the rice transplanter by the vertical movement of the float, and a rice transplanter that is mounted so as to be pittable by a hydraulic cylinder. The pitching sensitivity switching mechanism of the working machine is simultaneously switched by one operating mechanism, and the vertical movement and pitching of the rice transplanting working machine are performed in the most preferable condition depending on the hardness or softness of the rice field in the field for seedling planting. It is possible to perform highly accurate planting work by improving the ability of the working machine to follow the rice field surface and keeping the planting depth of seedlings constant.

[Brief explanation of drawings]

The drawing is a side view of the entire riding-type rice transplanter showing one embodiment of the present invention. 1... Traveling vehicle body, 2... Hydraulic cylinder, 3...
Lift mechanism, 4... Rice transplanting machine, 5... Seedling tank, 6... Planting body, 7... Center float, 8
...Side float, 9...Sensing mechanism, 9a...
Operating wire, 10... valve, 11... driver's seat,
12... Spring, 13... Sensitivity switching lever, 14
... Spring, 15 ... Operation wire.

Claims (1)

[Scope of Claims] 1. A lift mechanism that moves up and down by a hydraulic cylinder is provided at the rear of the traveling vehicle body, a rice transplanting machine having a float is attached to this lift mechanism, and the up and down movement of the float is carried out during the planting operation of the rice transplanting machine. The riding type rice transplanter is provided with a sensing mechanism that senses the pressure and expands and contracts the hydraulic cylinder to move the rice transplanting machine up and down, and a sensitivity switching mechanism that switches the expansion and contraction operation of the hydraulic cylinder by this sensing mechanism between a sensitive side and an insensitive side. In the machine, the lift mechanism is provided with a pitting support mechanism that supports the rice transplanting machine in a pitchable manner, and the pitching support mechanism is adapted to adjust the surface pressure by switching the pitching support mechanism from the traveling vehicle body side to a side where the surface pressure of the float becomes stronger and a side where the surface pressure of the float becomes weaker. 1. A pitting sensitivity adjustment device for a riding type rice transplanter, characterized in that a mechanism is provided, and the surface pressure adjustment mechanism and the sensitivity switching mechanism are configured to be interlocked.