JPH0425761B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a sensor float that is pivotably supported to be able to move up and down relative to a seedling planting device and that is biased in a downward direction. Seedling planting device lifting and lowering control means for operating the seedling planting device driving lifting mechanism based on the operation to maintain the vertical height of the sensor float relative to the seedling planting device within a set range;
A mud hardness detection piece is provided that swings in the longitudinal direction of the aircraft due to ground resistance as the aircraft moves after entering the mud. The present invention relates to a rice transplanter in which the sensing sensitivity of a sensor float is configured to be variable by automatically increasing the downward biasing force.

[Conventional technology]

In this type of rice transplanter, the mud hardness detection piece has conventionally been attached to a mounting bracket extending forward from the front end of the sensor float (for example, Japanese Patent Laid-Open No. 58-20104). .

[Problem that the invention seeks to solve]

However, in order to prevent weeds from getting tangled with the swing fulcrum and causing malfunctions, it is necessary to install a tangle prevention piece for the mud hardness detection piece that extends forward, which reduces the number of parts. As the number increased, the structure became more complex.

An object of the present invention is to provide a device that can reduce the number of parts by simply changing the mounting structure of the mud hardness detection piece.

[Means for solving problems]

The characteristic configuration according to the present invention is that a bracket is provided in a space surrounded by a peripheral wall at the front part of the sensor float, a mud hardness detection piece is swingably attached to this bracket, and a mounting base of this mud hardness detection piece is attached to the bracket. The end portion extends laterally beyond the peripheral wall, and this extended end portion further extends rearward and downward, and its effects are as follows.

[Effect]

In other words, by setting the swinging mounting position of the mud hardness detection piece at the front of the sensor float surrounded by the peripheral wall, the swinging mounting point can be prevented from getting mud attached or getting tangled with foreign objects. , the sensor swing of the mud hardness detection piece can be performed as expected. Moreover, since it is sufficient to set the extension part of the mud hardness detection piece that extends laterally beyond the peripheral wall to a simple shape (no swinging fulcrum) that improves mud flow, this part can be used easily. There are also fewer foreign objects caught.

〔Effect of the invention〕

As a result, by rationally setting the rocking attachment point of the mud hardness detection piece that is likely to catch foreign objects, etc., the sensor operation of the mud hardness detection piece can be performed as expected. This makes it possible to control the raising and lowering of the seedling planting device well, and there is no need to provide entanglement prevention pieces unlike in the past.

〔Example〕

As shown in Figure 5, engine 1 is installed at the front of the aircraft.
A seedling planting device 8 consisting of a seedling platform 4, a seedling planting mechanism 6, a planting case 6, and a group of 7 ground floats is moved through an elevating link mechanism 9. A rice transplanter is constructed by interlocking and connecting them so that they can be driven up and down.

The elevation control means of the seedling planting device 8 will be described in detail. 1st
As shown in the figures or FIG. 4, a connecting arm 11 is protruded and fixed so as to be integrally rotatable to a horizontal support shaft 10 which is rotatably supported around its own axis with respect to the planting case 6. The free end of the arm 11 and the rear end bracket 12 of the sensor float 7A located at the center of the group of grounding floats 7 are interlocked and connected so as to be relatively swingable, and the connection axis between the bracket 12 and the free end of the connecting arm 11 is connected. This is a pivot point for operating the sensor so that the sensor float 7A can swing up and down using X as a rear fulcrum. A peripheral wall 14 is provided at the front of the sensor float 7A, extending forward and laterally, and a front end bracket 13 is provided in the internal space of this peripheral wall 14. Also, behind this bracket 13, there is a spool 1 of a control valve 16 for driving the seedling planting device for raising and lowering the seedlings.
A bracket 2 for mounting the inner wire 17a of the release wire 17 is interlocked with a bracket 19 fixed to an operating shaft 18 that operates the release wire 6a in forward and reverse directions.
6 is erected. Further, the release wire 1 is attached to the support member 24 extending from the planting case 6.
A compression spring 20 is provided between the inner wire mounting bracket 26 and the support member 24 to bias the sensor float 7A toward the ground. Therefore, based on the displacement of the sensor float 7A that swings up and down against the biasing force of the compression spring 20, seedlings are planted so as to maintain the attachment interval l between the outer wire attachment end and the inner wire attachment end at the set interval. The device is configured as a means for controlling the raising and lowering of the seedling planting device 8 by operating a hydraulic cylinder 15 as a lifting mechanism for driving the attached device.

The support member 24 is pivotally supported by the planting case 6 around the front-back axis 21 so as to be able to swing freely, and the outer wire 17b is attached to one end, and an engagement hole 24a for the planting depth adjustment lever 25 is formed at the other end. It has been done.

When the planting depth adjustment lever 25 integrally fixed to the horizontal support shaft 10 is operated, the connecting arm 11 is swung up and down to raise and lower the rear fulcrum, and the support member 24 is swung up and down to adjust the mounting distance l. It is possible to raise and lower the plant in the same direction as the rear fulcrum while keeping it constant, making it possible to control the planting depth.

Next, the mounting structure of the mud hardness detection piece 22 will be described in detail. The base end 22A of the mud hardness detection piece 22 is rotatably supported on the front end bracket 13 about the horizontal axis, and the free end of the mounting base 22A is extended beyond the peripheral wall 14. It extends laterally and laterally. A flange surface is formed at the tip of this mounting base end 22A, and the extending end 22B of the mud hardness detection piece 22 that protrudes into the mud surface is attached to the mounting base end 22A via the flange surface. .

Further, the mounting base end 22A receives the compression spring 20, and the compression spring 20
An operating arm 23 extends to vary the installation length of the sensor, and when the mud hardness detection piece 22 swings due to the mud resistance applied to the aircraft, the biasing force of the compression spring 20 can be changed. The biasing force applied to the float 7A can be varied. Further, the compression spring 20 also serves as a biasing mechanism for the mud hardness detection piece 22.

The mounting base end 22A of the mud hardness detection piece 22 has an outer part 22a having a flange surface and an inner part 22b pivotally supported by the front end bracket 13.
The end portion 22 extends from the side surface of the side float 7A.
The interval up to B can be changed.

As shown in FIG. 4, the mounting flange surface of the extending end 22B is fixed to the flange surface of the mounting base end 22A with two bottles, but One bottle hole 22c on the mounting flange surface is a long hole, so that the mounting angle of the extending end 22B with respect to the mounting base end 22A can be adjusted.

[Another example]

B. The seedling planting device drive lifting mechanism 15 may be a pneumatic cylinder other than a hydraulic cylinder or a mechanical link mechanism using an electric motor.

○B As the means for raising and lowering the seedling planting device, a wheel case with a propulsion wheel pivoted at the lower end is pivoted to the body frame so as to be able to swing up and down around a mounting fulcrum, and this wheel case is allowed to swing up and down with respect to the body. Depending on the situation, it may be one that is used in a walking rice transplanter that controls the raising and lowering of the seedling planting device 8.

[Brief explanation of drawings]

The drawings show an embodiment of the rice transplanter according to the present invention, FIG. 1 is a side view showing how the sensor float and the mud hardness detection piece are attached, and FIG. 2 is the attachment of the sensor float and the mud hardness detection piece. 3 is a plan view showing the connection between the support member and the planting depth adjustment lever; FIG. 4 is a longitudinal sectional view showing another example of the installed state of the mud hardness detection piece; FIG. 5 is an overall side view. 7A...sensor float, 8...seedling planting device,
13... Bracket, 14... Peripheral wall, 15... Seedling planting device drive lifting mechanism, 22... Mud hardness detection piece,
22A... Mounting base end, 22B... Extension end.

Claims (1)

[Claims] 1 Operates the seedling planting device drive lifting mechanism 15 based on the lifting operation caused by ground pressure fluctuations of the sensor float 7A, which is pivotably supported to the seedling planting device 8 so as to be able to move up and down and is biased in the downward direction. In addition, it is equipped with a seedling planting device elevation control means that maintains the vertical height of the seedling planting device 8 of the sensor float 7A within a set range. A mud hardness detection piece 22 that swings in the front-rear direction is provided, and as the mud hardness detection piece 22 swings as ground resistance increases, the downward biasing force against the sensor float 7A is automatically increased. A rice transplanter in which the sensing sensitivity of the float 7A is configured to be variable, the sensor float 7A
A bracket 13 is provided in a space surrounded by a peripheral wall 14 at the front part of the mud hardness detection piece 22, and a mud hardness detection piece 22 is swingably attached to this bracket 13. The rice transplanter extends laterally beyond the peripheral wall 14, and has an extended end portion 22B further extending rearward and downward.