JPS6317307Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has a propulsion wheel placed at one location in the longitudinal direction of the aircraft when viewed from the side, and a sensor float installed in the front of the propulsion wheel to detect the ground height of the aircraft relative to the mud surface. The present invention relates to a rice transplanter in which a float for a seedling planting device is disposed at the rear of the propulsion wheel.

In the above-mentioned rice transplanter, there is a desire to prevent the body from standing up when the wheels stop running, and there is also a desire to keep the detection sensitivity of the sensor float constant regardless of the hardness or softness of the mud.

In other words, the above-mentioned rice transplanter is generally configured in a forward balance state in order to prevent the rear part of the machine body from sinking due to the driving reaction force of the wheels. Therefore,
When stopping the machine during planting work to replenish seedlings, the drive reaction force of the wheels disappears and the machine moves forward, and the sensor float moves up to control the wheels to descend. There is a drawback that when the device stands up, the inclined seedling stand becomes horizontal, making it difficult to replenish the seedlings as the seedlings may fall off.

On the other hand, when the mud surface is hard, the ground pressure of the sensor float increases, and as a result, the sensor float is moved upward, and the wheel is controlled to descend.When the mud surface is soft, the sensor float The ground pressure decreases, the sensor float descends, and the wheel lift control is performed, which has the drawback that accurate detection cannot be performed due to the hardness and softness of the mud.

Conventionally, the front part of the sensor float has been configured to be able to swing up and down at the rear fulcrum, which has the disadvantage that the sensor float has a large swing position as the aircraft moves forward, causing the aircraft to stand up significantly. Additionally, when working in soft fields, lowering the rocking fulcrum of the sensor float in order to increase the ground contact area of the sensor float and obtain a constant ground pressure will generally result in this type of sensor float being configured to tilt forward. Because of this, there was a drawback that the front was raised and the ground contact area could not be increased.

The present invention aims to eliminate the above-mentioned drawbacks by devising the mounting structure of the sensor float.

The characteristic structure of this invention to achieve the above purpose is as follows:
The sensor float is configured such that the front end side is a fulcrum and the rear end side is swingable up and down, and the mounting position of the front end side fulcrum relative to the aircraft body is configured to be adjustable up and down. This configuration provides the following effects.

In other words, since the rocking fulcrum of the sensor float is generally low relative to the ground, even if the aircraft moves forward when it stops moving, the amount of downward movement of the aircraft is small, and therefore, the amount of downward movement of the aircraft is small. The accompanying rocking displacement of the sensor float is small, and it is possible to suppress a large rise of the aircraft.

When working in soft fields, lowering the swinging fulcrum of the sensor float in order to increase the ground contact area of the sensor float and obtain a constant ground pressure.
Although the rear part of the sensor float will rise slightly,
The ground contact area of the float increases relatively.

Therefore, in soft fields, the sensor float is lowered to increase the contact area of the sensor float to obtain a constant ground pressure, and in hard fields, the sensor float is raised to reduce the contact area of the sensor float. By obtaining a constant ground pressure, the detection sensitivity of the sensor float can be kept constant.

This facilitated the replenishment of seedlings when the aircraft stopped moving, and also enabled good detection regardless of the hardness or softness of the mud surface.

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

Figure 1 shows the side view of the riding rice transplanter.
Front engine 1, rear seedling planting device 2, control seat 3
A pair of left and right propulsion wheels 4, which ground the aircraft consisting of
4. The front grounding float 5 as a sensor float that contacts the mud surface and the rear grounding float 6 that contacts the mud surface work together to support the movement, and in the seedling planting device 2, the seedling planting device 2 reciprocates horizontally with a constant stroke. It is configured to sequentially take out and plant seedlings one by one using planting claws 8 from a group of seedlings placed on a seedling stand 7 that is being moved.

Next, the automatic wheel elevation control mechanism will be explained.

That is, the wheels 4, 4 are supported by support cases 9, 9 which also serve as transmission cases and are swingable up and down, and hydraulic pressure is applied to forcibly swing these support cases 9, 9 to forcibly raise and lower the wheels 4, 4. cylinder 1
0 is set. Further, the front float 5
is pivotally supported vertically with its front end as a fulcrum P, and is configured to detect the height of the aircraft relative to the mud surface by vertical displacement of its rear end. The control valve 11 of the cylinder 10 is interlocked and connected via a link mechanism 12.

When the height of the aircraft body relative to the mud surface becomes low, the wheels 4, 4 are lowered, and conversely, when the height relative to the mud surface becomes high, the wheels 4, 4 are raised, thereby setting the height of the aircraft body relative to the mud surface. The height is automatically maintained.

Also, a frame body 13 supporting the front end of the front float 5
, a plurality of engagement holes 15 that can be freely engaged with the fixing pin 14.
... is formed along the vertical direction, and a spring 1 that elastically urges the frame 13 toward the pin side.
6 and 16 are provided. By adjusting the engagement position of the frame 13 with respect to the pin 14 up and down, the fulcrum P of the front float 5 can be adjusted up and down.

In the embodiment, the front end fulcrum P of the grounding body 5 is exemplified as being changed and adjusted in a stepwise manner, but a stepless adjustment may be made using a screw mechanism or the like.

[Brief explanation of the drawing]

The drawing is a side view showing an embodiment of the rice transplanter according to the present invention. 2... Seedling planting device, 4... Propulsion wheel, 5... Sensor float, 6... Float, P... Fulcrum.

Claims (1)

[Scope of utility model registration request] When viewed from the side, propulsion wheels 4, 4 are disposed at one location in the longitudinal direction of the aircraft, and a sensor float 5 is disposed in front of the propulsion wheels 4, 4 to detect the height of the aircraft relative to the mud surface. In a rice transplanter in which a float 6 of a seedling planting device 2 is disposed at the rear of the propulsion wheels 4, 4, the sensor float 5 is configured to be able to swing up and down with its front end as a fulcrum P and its rear end as a fulcrum P. The rice transplanter is also characterized in that the mounting position of the front end side fulcrum P relative to the body can be adjusted up and down.