JPH0157923B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that a plurality of ground floats that can be vertically oscillated are arranged side by side in the left and right direction in a planting device that is connected to the plant so that it can be driven up and down. A mechanism is provided that rigidly connects the dynamic fulcrum so that it can be integrally displaced in the vertical direction as the ground pressure changes, and the rigid linkage mechanism and the elevation control valve of the planting device are linked. Based on the integral vertical displacement of the floats, the ground pressure of these grounding floats is maintained within the set range.
The present invention relates to a lifting control device for a planting device in a rice transplanter, which is configured to automatically control the driving up and down of the planting device.

In this type of elevation control device for a planting device, the rocking fulcrum of the ground float is rigidly connected so that it can be integrally displaced in the vertical direction based on changes in ground pressure, so even if there are many unevenness in the left and right direction. Even in the field, unreasonable vertical displacement of one of the grounding floats caused by local unevenness can be suppressed by the ground thrusting action and pulling back action of the other grounding float, and the overall contact width of the float can be improved. Since it is possible to capture only changes in the unevenness of the ground, for example, compared to the conventional case in which only one ground float is configured to detect ground pressure, it is possible to improve the planting depth as a control result. It has the advantage of being easy to stabilize.

An object of the present invention is to simplify the planting depth adjustment structure and facilitate the adjustment work by utilizing the configuration for achieving the above advantages.

The lifting control device for a planting device in a rice transplanter according to the present invention has the above-mentioned configuration, and has a linkage mechanism between the rigid body connection mechanism and the lifting control valve, in which the relative linkage relationship between the two is determined by the swinging of the ground float. Since the device is characterized in that it is provided with a mechanism that can be adjusted while the fulcrum is changed in position up and down, the valve switching operation that accompanies adjustment of the linkage state between the rigid body connection mechanism and the elevation control valve is The set planting depth can be adjusted by using the fact that the planting device is raised and lowered by the system, and the swinging fulcrum of the ground float is integrally changed to a height position corresponding to the above-mentioned linked state. .

Therefore, by simply adjusting the state of connection between the rigid body connection mechanism and the elevation control valve, the set planting depth can be adjusted using the driving force of the elevation control device originally equipped in this type of rice transplanter. For example, compared to the conventional method of adjusting the set planting depth by individually changing the swing fulcrum position of each ground float, the set planting depth can be adjusted easily with less effort. In addition to being able to carry out this process, it has also become possible to easily construct a structure for this purpose.

The rear-mount type riding rice transplanter to which the present invention is applied will be explained below. As shown in FIG. A four-row planting device B is connected so as to be vertically movable via a link mechanism 2, and two ground floats 3A and 3B, which can swing up and down using the front and rear intermediate portions as fulcrums, are attached to the planting device B on the left and right sides. A hydraulic cylinder 4 is installed between the frame 1 and the link mechanism 2, and the planting device B is driven up and down by switching the elevation control valve 5 for the hydraulic cylinder 4. It is configured.

Further, a mechanism 6 is provided which rigidly connects the rocking fulcrums of the ground floats 3A and 3B so as to be able to move integrally in the vertical direction based on changes in ground pressure, and the rigid link mechanism 6 and the elevation control valve 5 are linked. , based on the integral vertical displacement of the grounding floats 3A, 3B, these grounding floats 3A, 3B
In order to maintain the ground pressure of 3B within the set range,
The planting device B is configured to be automatically controlled to move up and down.

The rigid connection mechanism 6 includes arms 10 that are pivotally connected to a common connection shaft 8 that is rotatably supported by the planting transmission case 7 of the planting device B, and to the brackets 9A and 9B of the ground floats 3A and 3B, respectively.
A, 10B are fixed, and a sensing arm 11 is connected to the middle part of the common connecting shaft 8, and the vertical displacement of the swinging fulcrum of the grounding floats 3A, 3B is converted into the back and forth swinging of the sensing arm 11. It is configured as much as possible.

Also, the float 3 is connected via the sensing arm 11.
A spring 12 is provided to bias A and 3B in the direction of contact with the ground, and this spring 12 and an operating lever 13 on the A side of the machine are linked via a release wire 14, and when the operating lever 13 is operated, the spring 12 is activated. It is configured so that the set sensing load can be changed.

The linkage mechanism 15 between the rigid body connection mechanism 6 and the elevation control valve 5 is configured by the elevation control valve 5.
The spool 5 of the valve 5 is attached to one end of the inner shaft 16 of the inner and outer double shafts 16 and 17 provided near the valve 5.
An arm 18 that can forcibly switch A into three states: a neutral state, a raised state, and a lowered state is fixed, and an arm 19 fixed to the other end of the inner shaft 16 and the sensing arm 11 of the rigid body connection mechanism 6 are connected. are linked via the release wire 20, and the inner shaft 1
Spring 21 that biases 6 to rotate in the upward operation direction.
has been established.

When the grounding pressure of the grounding floats 3A, 3B increases and the swinging fulcrums of both the grounding floats 3A, 3B are integrally displaced upward by a certain amount or more, the inner wire, which is one component of the release wire 20, 20A is loosened, the lift control valve 5 is switched to the lift state by the biasing force of the spring 21, and the planting device B is controlled to rise until the ground pressure of the ground floats 3A, 3B returns to within the set range. Conversely, when the grounding pressure of the grounding floats 3A, 3B decreases and the swinging fulcrums of both the grounding floats 3A, 3B are integrally displaced downward by a certain amount or more, the inner wire 20A is pulled, The lifting control valve 5 is switched to the lowering state against the biasing force of the spring 21, and the planting device B is controlled to lower until the grounding pressure of the grounding floats 3A, 3B returns to within the set range.

Moreover, since the grounding floats 3A and 3B are rigidly connected, the vertical displacement of one of the grounding floats 3A or 3B caused by local unevenness fluctuations of the grounding surface in the left-right direction is absorbed by the other grounding float 3B or 3A. It is possible to perform elevation control by capturing the unevenness variation of the entire ground contact surface over the entire float contact width by suppressing it by the ground thrusting action and pulling back action.

Therefore, in the linkage mechanism 15, the relative linkage relationship between the lift control valve 5 and the rigid body linkage mechanism 6,
While the set sensing load by the spring 12 is kept constant or almost constant, the grounding float 3
A mechanism 22 is provided in which the swinging fulcrums A and 3B can be adjusted by changing their positions up and down.

The linkage adjustment mechanism 22 is provided with an adjustment lever 24 that is swingable back and forth around the horizontal axis on the side of the planting transmission cable 7, and the linkage adjustment mechanism 15 is provided above the swinging fulcrum of the adjustment lever 24. The outer wire 2 which is the other component of the release wire 20 and is fitted around the inner wire 20A
A receiving member 25 is provided to fixedly hold one end of the adjustment lever 24, and the other release wire 14 is provided below the swinging fulcrum of the adjustment lever 24.
This structural member includes a receiving member 26 that fixes and holds one end of the outer wire 14B fitted over the inner wire 14A, and is capable of locking and holding the adjustment lever 24 at a plurality of positions within its swing range. The operation guide plate 27 is fixed to the planting transmission case 7 side, and then both the outer wires 20B, 14B are adjusted by swinging the adjustment lever 24.
By moving one end portion in opposite directions along the inner wires 20A, 14B, the swinging fulcrum of the grounding floats 3A, 3B can be changed up and down to adjust the planting depth, and the planting depth can be adjusted. The configuration is such that the set sensing load of the grounding floats 3A, 3B is kept constant or almost constant regardless of the adjustment.

The outer shaft 17 is provided with an arm 28 and a manual operation lever 29 that can press and switch the spool 5A of the valve 5 only to the upward position.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the lifting control device for the planting device in the rice transplanter according to the present invention, where FIG. 1 is an overall side view of the riding rice transplanter, FIG. 2 is a lifting control system diagram, and FIG. 3 is a main part. FIG. A... This machine, B... Planting device, 3A, 3B...
...Ground float, 5...Elevation control valve, 6...
Rigid body connection mechanism, 15... linkage mechanism, 22... linkage adjustment mechanism.

Claims (1)

[Claims] 1. A plurality of ground floats 3A and 3B that can freely swing up and down are arranged side by side in the left and right direction on a planting device B that is connected to the planter A so that it can be driven up and down, and the swing fulcrum of these ground floats 3A and 3B is A mechanism 6 is provided which rigidly connects the 2 and 3 so as to be integrally displaceable in the vertical direction as the ground pressure changes, and the rigid body connection mechanism 6
and the elevation control valve 5 of the planting device B, and based on the integral vertical displacement of the ground floats 3A, 3B, these ground floats 3A,
In order to maintain the ground pressure of 3B within the set range,
This is an elevation control device for a planting device in a rice transplanter configured to automatically control the elevation and elevation of the planting device B, in which a linkage mechanism 15 between the rigid body connection mechanism 6 and the elevation control valve 5 includes a mechanism for controlling both of them. 6,
The relative linkage mechanism of 5 is connected to the ground floats 3A, 3B.
1. A device for controlling the elevation of a planting device in a rice transplanter, characterized in that a mechanism 22 is provided which can adjust the swinging fulcrum of the device to change its position up and down.