JPH0420166Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is based on the up and down movement of a sensor float, which is biased in the direction of ground contact by a biasing mechanism, in response to changes in ground contact. The present invention relates to a paddy field working machine equipped with a lifting control mechanism that maintains a constant attitude of the machine against the ground.

[Prior art]

When working with a traveling machine, contaminants such as grass clippings floating on the mud surface may act on the sensor float and cause the ground pressure to fluctuate, causing a malfunction in the ground posture of the work equipment. Traditionally, rice transplanters have been using rice transplanters, such as the
As disclosed in the above publication, a sensor float has been proposed in which a guide plate for pushing out foreign objects is disposed in front of the sensor float.

[Problem that the invention attempts to solve]

However, according to the above configuration, although it is true that the guide plate can temporarily prevent foreign objects from acting on the sensor float, the foreign objects gradually get caught in the front part of the guide plate. In the past, there was a drawback that a large amount of foreign matter could accumulate and eventually act on the sensor float, causing malfunctions, and there was room for improvement.

Particularly in areas where seedlings are planted immediately after wheat harvest, seedlings must be planted with cut wheat straw scattered on the mud surface, and the work equipment is controlled by the lifting control device. There was a problem with ground attitude control.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a paddy field working machine that can reliably prevent foreign substances from acting on the sensor float.

[Means for solving problems]

That is, the characteristic configuration of the paddy field work machine according to the present invention is that a pair of guide plates for pushing out foreign matter are arranged in a V-shape with a narrow front side in plan view at a position in front of the sensor float, and A rotary body for pushing foreign matter is disposed between the plates with its tip protruding forward from the guide plate, and its functions and effects are as follows.

[Effect]

In other words, a pair of guide plates for pushing out foreign matter are placed in front of the sensor float in a V-shape with a pointed front side in plan view, so that foreign matter floating in front of the sensor float can be removed by the guide plates. It can be pushed aside to prevent it from acting on the body. Furthermore, since a rotary body for pushing foreign matter is disposed between the pair of guide plates with its tip protruding forward from the guide plate, the contaminants are not pushed away by the guide plates, but are pulled by the tips of the guide plates. The dirt that gets stuck can be removed by pushing it into the mud surface with a rotating body.

[Effect of idea]

As a result, foreign matter in front of the sensor float can be removed reliably and over a long period of time through the interaction between the guide plate and the rotating body, and the sensor float can remove debris such as cut straw. The reliability of the control mechanism for raising and lowering the work equipment can be improved, as the work equipment is no longer adversely affected by contaminants.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 5 shows a riding-type rice transplanter, which is a typical rice paddy work machine. In this rice transplanter, a seedling planting device 3 consisting of a seedling platform 7, a seedling planting mechanism 8, a planting case 9, and a group of ground floats 10 is mounted on the rear of the traveling body and is oscillated by a hydraulic cylinder 11. Link mechanism 12
They are connected to each other so that they can be driven up and down.

Next, the elevation control mechanism 4 of the seedling planting device 3 will be explained.

The grounding float 10, as shown in FIG.
It is composed of a sensor float 2 at the center of the body and side floats 13 on both sides of the sensor float 2, and the sensor float 2 is rotated around the horizontal axis via a connecting arm 14 which is pivotally attached to the planting case 9 so as to be able to freely swing up and down. It is pivotally supported so that it can swing freely. Also, sensor float 2
A swinging arm 16 is pivotally supported on the front bracket 15, and an inner wire 17a of a release wire 17 is linked to the front end of the swinging arm 16, and this inner wire 17a drives the lifting link mechanism 12 for the seedling planting device. The hydraulic cylinder 11 is connected to a control valve 18 provided for the hydraulic cylinder 11.

On the other hand, the upper spring receiving member 1 is attached to the planting case 9.
9 is fixed to the upper spring receiving member 19, and one end of the outer wire 17b of the release wire 17 is fixed to the upper spring receiving member 19. Further, a compression spring 1, which is an example of a biasing mechanism for biasing the sensor float 2 downward, is applied to the rear end of the swing arm 16.

In other words, due to ground pressure fluctuations, the sensor float 2
If the front end moves up and down, the inner wire 17a
switches and operates the control valve 18 to control the raising and lowering of the seedling planting device 3 so that the reference distance between the end of the outer wire 17b and the front end of the swinging arm 16, which serves as the reference position of the seedling planting device 3, is constant. It is composed of

Further, as shown in FIGS. 1 and 4, a swing shaft 23 of the swing arm 16 extends laterally, and a mud hardness detection bar 24 is mounted rearward at the end of the swing shaft 23. As the field becomes harder and the mud hardness detection bar 24 is swung upwards, the compression spring 1 is compressed more when the control is in the neutral state, and the ground pressure of the sensor float 2 becomes larger. The control speed is automatically adjusted to be insensitive, or to be sensitive when the field is soft.

At the front position of the sensor float 2, a pair of left and right mounting arms 2 are attached from the planting case 10.
5 and 25 are extended forward, and a pair of guide plates 5 and 5 are provided at the tip of the mounting arm 25 for pushing out foreign objects.
is arranged and fixed in a V-shape with a narrow front side in plan view. As shown in FIGS. 1 and 2, the pair of guide plates 5, 5 are arranged so that the lower part is located inward compared to the upper part, and is formed just like the bow of a ship. A horizontal shaft 26 is installed between both the mounting arms 25 between the pair of guide plates 5, 5.
A rotating body 6 is rotatably attached to the guide plate 5, and the tip of the rotating body 6 is set to protrude forward from the front end of the guide plate 5. A plurality of recesses 27 are formed around the rotating body 6.

According to the above configuration, when foreign matter such as cut straw is located in front of the sensor float 2, the foreign matter hits the tip of the rotary body 6 and the rotary body 6 rotates, thereby removing the foreign matter from the mud surface. In addition to being able to be embedded within the sensor float 2, the foreign matter is pushed aside from side to side by the guide plate 5, and the foreign matter does not act on the sensor float 2. Also, as mentioned above, the rotating body 6
Contaminants such as cut straw are likely to be caught in the concave portion 27 formed around the mud surface and embedded in the mud surface.

Further, a rotary body 28 is provided for removing cut straw acting on the mud hardness detection bar 24 described above. To explain the details, as shown in FIGS. 1 and 2, an arm 29 is extended from the sensor float 2, and a rotating body 28 is rotatably attached to the tip of the arm 29. The lower end portion is arranged at a position below the mud hardness detection bar 24. Further, a plurality of recesses 30 are formed in the outer circumference of the rotating body 28 . Therefore, the cut straw is embedded in the mud surface by this rotating body 28,
It is possible to prevent grass cuttings from acting on the mud hardness detection bar 24.

[Another example]

In the above embodiment, the guide plate 5 and the rotating body 6 are attached to the planting case 9, but they may be fixed to the sensor float 2 side. Also,
A rotating body 18 that prevents foreign matter from acting on the mud hardness detection bar 24 may be attached to the planting case 9 side. Furthermore, each rotating body 6, 18 may be driven to rotate.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the rice paddy work machine according to the present invention, in which FIG. 1 is a plan view of the grounding float portion, FIG. 2 is a side view of the grounding float portion, and FIG. 3 is a cross-sectional view taken along the line - in FIG. 2. FIG. 4 is an explanatory diagram showing the elevation control mechanism, and FIG. 5 is an overall side view of the riding rice transplanter. 1... Biasing mechanism, 2... Sensor float, 3...
... Working device, 4... Lifting control mechanism, 5... Guide plate, 6... Rotating body.

Claims (1)

[Scope of utility model registration request] A lift control mechanism 4 is provided to maintain a constant ground attitude of a working device 3 attached to a traveling machine body based on the up and down movement of a sensor float 2 urged in the ground contact direction by a biasing mechanism 1 as the sensor float 2 changes in ground contact. This paddy field working machine has a pair of guide plates 5 for pushing out foreign objects at a position in front of the sensor float 2,
5 are arranged in a V-shape with a narrow front side in plan view, and the tip of the guide plate 5 is disposed between the guide plates 5, 5.
A paddy field work machine in which a rotary body 6 for pushing foreign matter is arranged in a state of protruding further forward.