JPS6335535Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention supports the aircraft on the ground by means of a propulsion wheel and a ground float of the planting device, which are located at one location in the longitudinal direction when viewed from the side and at the center in the width direction of the aircraft when viewed from above. The present invention relates to a riding rice transplanter that is configured to allow the rice transplanter to travel during planting, and is provided with a pair of left and right tiller-ground type auxiliary supports on the side of the planting device.

In such a riding rice transplanter, when planting in a field with poor conditions, where the planting mud surface is very soft and the float cannot sufficiently support the machine, the auxiliary support can be used to ground the tiller.
To prevent the planting device from sinking and to stably support the aircraft on the ground. In addition, in soft fields, since it is a one-wheel, two-sled type, one of the left and right wheels will not slip on the unevenness of the tiller and the machine will meander, unlike the two-wheel, two-sled type, and it has good straight-line performance. be.

However, if the auxiliary support falls into the concave part of the tiller or rides on the convex part of the tiller, it tends to cause the planting device to tilt in the left-right direction.
Despite improving the stability of ground support, there was a problem in that the planting depth and planting posture tended to vary in the left and right directions.

Conventionally, there is a technique disclosed in Japanese Patent Publication No. 46-609 as a means for preventing the aircraft from tilting from side to side. In this structure, the sled body serving as the left and right auxiliary supports is pivoted to the fuselage via a link mechanism so that it can move up and down in a contralateral manner, and within the link mechanism, the sled body is parallel to the swing axis of the sled body. A single spring is used to pull the middle of the link to bias both sled bodies into contact with the tiller, and if the left and right sled bodies move up and down contrary to each other due to unevenness of the tiller, they will be lowered. The spring is swingably attached to the link so as to strengthen the biasing force of the side sled body.

However, if the left and right sled bodies are moved up and down contrary to each other to strengthen the biasing force of the descending sled body, the biasing force of the ascending sled body becomes relatively weaker, which means that the ground contact The drawback was that the air pressure became weaker, making it difficult for the aircraft to stabilize from side to side.
Therefore, there is still room for improvement in preventing the aircraft from tilting to the left or right using such technology.

This invention has a structure that allows the left and right auxiliary supports to move up and down to stabilize the machine in the lateral direction when the auxiliary supports fall into the concave part of the tiller or run onto the convex part of the tiller. That is.

The characteristic structure of this invention to achieve the above purpose is as follows:
A mechanism for detecting the inclination of the planting device in the left and right direction, and a mechanism for making the posture of the planting device with respect to the mud surface constant or almost constant based on the detection result thereof,
The present invention is characterized in that a drive mechanism is provided to individually drive the left and right auxiliary grounding bodies up and down, and this configuration provides the following effects.

That is, when the left and right auxiliary supports fall into the concave part of the tiller or ride on the convex part of the tiller, and the planting device tilts in the left-right direction, the detection mechanism detects this, and based on the detection result, the tiller By lowering the auxiliary support that has fallen into the recess or raising the auxiliary support that has climbed onto the convex part of the tiller, the attitude of the planting device relative to the mud can be maintained constant or almost constant. When working in a field with poor conditions as described above, the auxiliary support body can be grounded to the tiller to stabilize the ground support of the machine body. Since both of the auxiliary grounding bodies can move up and down independently, the auxiliary grounding body can be moved up and down in the tiller with reference to the other auxiliary grounding body that does not fall into the concavity of the tiller, or the other auxiliary grounding body that does not ride on the convex part of the tiller. By moving the auxiliary grounding body that has fallen down or that has climbed onto the convex part of the tiller up and down, the ground pressure of the left and right auxiliary grounding bodies can be made the same, and the machine can be stabilized in the lateral direction. I was able to measure it.

In particular, this invention prevents the increase in movement resistance and disturbance of mud surfaces caused by auxiliary supports when working under conditions where the aircraft can be stably supported on the ground only by the propulsion wheels and ground float. In order to achieve this, it is desirable to implement the drive mechanism in such a manner that both of the auxiliary supports can be switched to a non-operating position in an interlocked state.

Hereinafter, an embodiment of the present invention will be described based on the drawings. One propulsion wheel 1 moving on a tiller a,
The three mud surface grounding floats 3 attached to the four-row planting device 2 at the rear in parallel with each other in the horizontal direction support the machine on the ground and carry out planting. The structure is configured to level the mud surface on which the planting is planned, and to level the mud surface on the two inner sides where the planting is planned using the central float 3. Furthermore, at positions near the outer sides of the left and right sides of the three groups of floats, the three groups of floats In a riding rice transplanter in which bar-shaped auxiliary supports 4, 4 of the tiller ground type are extended from the upper front part of the machine body toward the lower part of the 3 groups of floats, the auxiliary supports 4, 4 are connected to the machine body. By vertically swinging around the mounting part of
Hydraulic cylinders 5, 5 are configured to be able to freely switch between a working position in which they are in contact with the ground above and a non-working position in which they are raised from the tiller a to a level above the mud surface b. , a device 6 is provided for detecting the inclination of the planting device 2 in the left-right direction by using the floats 3, 3 on both sides as ground pressure detection sensors, and the floats 3, 3 on both sides are provided with a device 6 for detecting the inclination of the planting device 2 in the left-right direction, and the floats 3, 3 on both sides are vertically oscillated due to ground pressure fluctuations. The operation of the control valves 7, 7 for the hydraulic cylinders 5, 5 is linked to
The auxiliary supports 4, 4 are configured to automatically swing up and down so that the attitude toward the dirt surface is substantially constant, that is, substantially horizontal. The control valve 7 and the float 3 are linked to the float 3 via an L-shaped link 12 that rotates the spool 7a of the control valve 7 around the horizontal axis Y. Then, the L-shaped link 12 is rotated to push in the spool 7a of the control valve 7 to extend the hydraulic cylinder 5, and when the float 3 descends, the spool 7a is pulled out and the hydraulic cylinder 5 is contracted.

The propulsion wheel 1 is configured as a steering wheel that can swing freely around the vertical axis X, and is composed of two wheels 1A and 1A arranged opposite each other with a small interval between them, so that it is essentially a single wheel. It is configured so that.

In the figure, 8 is a driver's seat, 9 is a control handle, and 10 is a driving unit.

Further, the hydraulic cylinders 5, 5 are provided with an operating lever 11 that can collectively operate both the control valves 7, 7, and are configured so that both the auxiliary supports 4, 4 can be switched to a non-operating position in an interlocked state. It has been done.

[Brief explanation of the drawing]

The drawings show an embodiment of the riding rice transplanter according to the present invention, with FIG. 1 being a side view, FIG. 2 being a rear view, and FIG. 3 being a plan view. DESCRIPTION OF SYMBOLS 1... Propulsion wheel, 2... Planting device, 3... Grounding float, 4... Auxiliary support, 6... Detection mechanism, 5... Drive mechanism.

Claims (1)

[Scope of claim for utility model registration] At one location in the front and back direction when viewed from the side, and
The propulsion wheel 1 and the grounding float 3 of the planting device 2 are arranged at the center in the width direction of the fuselage in plan view.
In the riding rice transplanter, the rice transplanter is configured to support the machine body on the ground and travel during planting, and is provided with a pair of left and right tiller ground type auxiliary supports 4, 4 on the side of the planting device 2. a mechanism 6 for detecting inclination in the left-right direction;
Based on this detection result, the attitude of the planting device 2 relative to the mud surface is kept constant or almost constant.
A riding rice transplanter characterized in that drive mechanisms 5, 5 are provided for driving the left and right auxiliary grounding bodies 4, 4 up and down separately. The drive mechanism 5 includes both the auxiliary supports 4,
4. The riding rice transplanter according to claim 1, which is configured to be operable to switch the position of the rice transplanter 4 to a non-working position in an interlocked state.