JPS6049446B2 - Riding rice transplanter - Google Patents

Description

[Detailed Description of the Invention] The present invention supports the aircraft on the ground by means of a propulsion wheel provided at one location in the front-rear direction when viewed from the side and three or more ground floats arranged laterally in parallel on the side of the planting device. In addition to being configured to allow planting to travel, an auxiliary support that can ground the planting device and support the planting device on the ground is provided in a vertically movable state, and is used to detect the ground pressure of the center float of the group of ground floats. Based on the above, the present invention relates to a riding rice transplanter provided with a mechanism for moving the auxiliary support body upward so that the float ground pressure is automatically maintained at a constant or approximately constant level.

In such a riding rice transplanter, it is necessary to ground the auxiliary support only when the mud is soft;
If it is possible to stably support the planting device on the ground using only a group of grounded floats, it is recommended to float the auxiliary support to the ground in order to prevent the auxiliary support from increasing movement resistance and disturbing the mud surface. It is desirable to switch to a positioned support configuration.

In view of this, the present invention makes effective use of the original function of the automatic vertical movement mechanism for the auxiliary support, and makes simple structural improvements by simply rearranging the ground pressure detection float.
The purpose is to automate the switching of support forms depending on the hardness and softness of the mud. The riding rice transplanter according to the present invention is characterized in that the ground pressure detection float is provided in such a manner that its lower surface is located slightly higher than the lower surfaces of the floats on both sides thereof.

That is, by positioning the lower surface of the ground pressure detection float a little higher than the bottom surfaces of both floats, if the mud is hard and the amount of sinking of the ground float group is small, the ground pressure detection float By making the ground pressure zero or very small,
Since the above-mentioned automatic vertical movement mechanism can now be made to move the auxiliary support upward, an extremely simple structural improvement can be made by positioning the ground pressure detection float 5 higher than the floats on both sides. As a result, when the muddy soil is so hard that the planting device side can be supported on the ground only by the ground-contact float cart group, it has become possible to automatically switch to a support mode in which the auxiliary support body is placed in a floating position above the ground.

Hereinafter, embodiments of the present invention will be described based on the drawings. A riding rice transplanter has one steering wheel and propulsion wheel 1 provided at the front in the center in the width direction of the machine body, and a rear planting device 2 side that is arranged laterally. Three ground floats 3 arranged in parallel are used to support a machine body having a driving part 4 and a passenger driving part 5 on the ground and drive it while planting.

In addition, the riding rice transplanter is provided with a pair of left and right oak-shaped auxiliary supports 6, 6 that can ground the tiller and support the planting device 2 side on the ground, and are swingable up and down around their front ends. , the ground pressure of the center float 3 of the ground floats 3... is automatically maintained at a substantially constant level based on the detection of the ground pressure that changes as the depth of the plow changes. That is, a mechanism 7 is provided for vertically moving the pair of auxiliary supports 6, 6 so that the height of the planting device 2 relative to the soil is automatically maintained substantially constant.

The grounding float 3 is attached to an arm 8 connected to the planting device 2 so as to be able to swing up and down around a fulcrum R provided near the rear of the arm 8. The commercial float 3 has its rear fulcrum R supported by an arm 8 via a link 9 so as to be able to freely swing up and down, and is provided with a spring 10 that swings and urges the link 9 downward, so that the float 3 can be moved in response to ground pressure fluctuations. The rear fulcrum R is configured to swing up and down.

The mechanism 7 is provided with a hydraulic cylinder 11 that swings the auxiliary supports 6 and 6 up and down as well as fixes them, and a control valve 12 of the hydraulic cylinder 11 is interlocked and connected to the link 9. .

In the figure a, the planting depth is changed by collectively swinging each arm 8 up and down to change the vertical distance between each rear fulcrum R... and the planting device 2. This is a control lever for

The ground pressure detection float 3 is provided so that its lower surface is located slightly higher than the lower surfaces of both floats 3'', 3'' when the ground pressure detection float 3 is located at a position for detecting the set ground pressure.

According to the above configuration, when the field is soft, the ground floats 3, 3
In cases where the ground supporting force of the groups ``, 3'' is insufficient, the auxiliary supports 6, While the six pairs ground the tiller and stably support the planting device 2 side, on the other hand,
If the field is hard, the planting device 2. When the side is sufficiently stably supported against the ground, the ground pressure of the ground pressure detection float 3 is set to the set ground pressure by the ground support action of the floats 3'' and 3'' on both sides. Since the ground pressure detection float 3 is in a detection state in which the pair of auxiliary supports 6, 6 is swung upward without sinking, the pair of auxiliary supports 6, 6 can be kept floating above the ground.

In addition, in the embodiment, the ground pressure of the ground pressure detection float 3 is
Although the ground pressure is detected by vertical swinging of the fulcrum R due to ground pressure fluctuations, the ground pressure may also be detected by vertically moving the float 3 using a load cell or the like.

[Brief explanation of drawings]

The drawings illustrate embodiments of the riding rice transplanter according to the present invention,
1 is a side view, FIG. 2 is a plan view, FIG. 3 is an enlarged side view of the main part, and FIG. 4A is an enlarged rear view of the main part showing the brightening effect. 1... Propulsion wheel, 2... Planting device,
3...Grounding float, 6...Auxiliary support, 7...6 vertical movement mechanism.

Claims (1)

[Claims] 1 Planting is carried out by supporting the aircraft against the ground using the propulsion wheel 1 provided at one location in the front and back direction when viewed from the side and three or more grounding floats 3, 3', 3' arranged laterally in parallel on the side of the planting device 2. In addition to being configured to run, an auxiliary support 6 capable of supporting the planting device 2 side on the ground by touching the tiller is provided in a vertically movable state, and the ground floats 3, 3'3'
Based on the ground pressure detection of the center float 3 among the groups,
In a riding rice transplanter equipped with a mechanism 7 for moving the auxiliary support 6 up and down so that the float ground pressure is automatically maintained constant or almost constant, the ground pressure detection float 3 is A riding rice transplanter characterized in that it is positioned slightly higher than the lower surfaces of floats 3' and 3' on both sides.