JPH0122414Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is capable of controlling the raising and lowering operations of a seedling planting device, which is attached to the traveling machine so as to be able to move up and down, and the on/off operation of the planting clutch. The present invention relates to a structure of an operating part of a rice transplanter configured to be operated by displacing one operating lever along a guide groove provided in sequence at a position and an input operating position for the planting clutch.

For rice transplanters, when turning around on the headland, it is necessary to quickly raise the seedling planting device.
Conventionally, the guide groove is generally configured as a straight line path, but conversely, when the seedling planting device is lowered after turning, the planting clutch is quickly operated to the engaged position, and the planting claw is raised above the ground. There was a drawback that the seedlings were taken out, so-called empty planting.

In view of the above-mentioned points, it is an object of the present invention to enable a seedling planting device to be quickly raised and lowered with a time delay, thereby suppressing empty planting.

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

A seedling planting device 5 is installed at the rear of a traveling vehicle body in which wheels 1 are mounted on front and rear wheels and a control unit 2 is arranged, and the seedling planting device 5 can be driven up and down via a link mechanism 3 and a hydraulic cylinder 4.
are linked together to form a riding rice transplanter.

A control valve V for the cylinder 4 is provided on one side to the right of the driver's seat 6, and an operating lever 9 is interlocked and connected to a rotating shaft 8 to which a spool operating arm 7 for the valve V is attached so as to be able to freely swing in a cross direction. Cylindrical member 1
An arm 1 is fitted onto the cylindrical member 10 so as to be able to rotate integrally with the control valve V by frictional force, and forcibly operates the control valve V to the drive upward side of the seedling planting device 5.
1 are arranged in series, and the float 1 is also used as a sensor in the rotation shaft 8 and the seedling planting device 5.
A support shaft 13, which integrally connects the rear end sides of 2 and 12 so as to be movable up and down, is interlocked with a bracket part 13a connected thereto via a release wire 14, and the seedling planting device 5 is connected by the lever 9. As the seedling planting device 5 descends to the planting position, the rotary shaft 8 is moved between the rotating shaft 8 and the cylindrical member 10 based on the earth pressure sensed by the float 12. The automatic lift control mechanism 15 is configured to automatically rotate against friction and automatically maintain the attitude of the seedling planting device 5 with respect to the planting mud surface at a constant or almost constant level.

Further, the cylindrical member 10 and the planting clutch 16 of the planting mechanism M are interlocked and connected via a mechanical interlocking mechanism, and the lever 9 is used to raise and lower the seedling planting device 5 and the planting clutch 16. It is configured so that it can be turned on and off.

In configuring the guide groove 19 for the lever 9, as shown in FIG. A first operation path _R1 is provided in a straight line from the raising operation position A to the clutch engagement operation position C, and as the lowering operation position B,
A first lowering operation position B in the middle of the first operation route R ₁ and a second lowering operation position B ₂ separated from the first lowering operation position B are connected to each other, and the above-mentioned raising operation position A and the second lowering operation position
A second operating path R ₂ is provided across the lower operating position B ₂ .

A coil spring 20 is attached to the lever 9, and the lever 9
The guide groove 19 is placed slightly in front of the driver's seat ₆ with the raising operation position A approaching, and the guide groove 19 is biased so as to be swung toward the second operation route R2. R ₁ is located on the side of the driver's seat 6, and while extending the hand, in other words, the lever 9 is easily pushed toward the second operating path R ₂ side.
Along the second operating path R ₂ and at the second lowering operating position
Seedling planting device 5 via B ₂ to clutch entry position C
on the other hand, while pulling the lever 9, that is, in a state where it is easy to push the lever 9 toward the first operating path _R1 , perform a rising operation from the clutch engaged operating position C after passing through the first lowering operating position _B1 . Position A
The seedling planting device 5 is configured to be raised by linearly displacing the seedling planting device 5 up to the point where the seedling planting device 5 is raised.

FIG. 5 shows another embodiment, in which, in the middle of the first operating route R ₁ , between the ascending operating position A and the first descending operating position B ₁ , a first position that interrupts the route R ₁ and a retreat from the route R ₁ are provided. A guide cam body 21 is provided in a swingable manner at a third position, and a tension spring 22 with a weak urging force is provided to urge the cam body 21 to swing toward the first position. A stopper 23 is provided to maintain the first position, and from the clutch engagement position C to the raising operation position A, the cam body 21 is swung to the second position by contact with the lever 9, and the first operation path R ₁
Although the raising operation can be performed along the first operation route R ₁ from the raising operation position A to the clutch engagement position C, the lever 9 cannot be moved from the upper operation position A to the clutch engagement position C by contacting the cam body 21 with the lever 9. The clutch is configured to be operated to the clutch engaged position C after being prevented from linear operation and directed from the second operating path _R2 to the second lowering operating position _B2 .

The spring 2 is attached to the coiled spring 20 and the cam body 21.
2 and a stopper 23 are collectively referred to as guide mechanisms 20 and 21.

In summary, in the present invention, in the operation section structure of the rice transplanter mentioned above, the guide groove 19 is configured by a first operation path R ₁ that is a straight line from the clutch engagement operation position C to the raising operation position A. , first and second lowering operation positions B 1 and B 2 are provided in series with each other in the middle of the first operation route R ₁ and at a position off the first operation route R ₁ , and the second lowering operation position B ₁ and B ₂ are provided in series with each other, A second operating path R ₂ is provided between the operating position B ₂ and the raising operating position A, and when operating from the clutch engaged operating position C to the raising operating position A, the operating lever 9 is moved to the second operating position.
It is characterized by being provided with guide mechanisms 20 and 21 for displacement via the operation path _R2 .

In other words, the raising operation of the seedling planting device 5 can be quickly performed by operating the lever 9 along the linear first operation route _R1 , while the lowering operation can be performed by the guide mechanisms 20 and 21 along the second operation route R1. From _{R2 ,} the operation is performed to the planting clutch engaged position C via the second lowering operating position _B2 , which is off the first operating path R1, so that there is a time delay between the descending state and the planting clutch engaged state. Because of this, the seedling planting device 5 can be driven in a state where it is lowered to the planting mud surface position, making it possible to suppress the occurrence of empty planting.

[Brief explanation of the drawing]

The drawings show an embodiment of the structure of the operation part of the rice transplanter according to the present invention, and FIG. 1 is an overall side view of the rice transplanter, FIG. 2 is a perspective view of the main parts, and FIG. 3 is a view from the opposite side of FIG. 1. Fig. 4 is a plan view of the main part, Fig. 5 is an enlarged side view of the main part of
The figure is a plan view of main parts showing another embodiment. 5...Seedling planting device, 9...Operation lever, 16...
...Planting clutch, 19...Guide groove, 20, 21...
... Guide mechanism, A ... Raising operation position, B ... Lowering operation position, B ₁ ... First lowering operation position, B ₂ ... Second lowering operation position, C ... Clutch engaged operation position,
_R1 ...first operation route, _R2 ...second operation route.

Claims (1)

[Scope of utility model registration request] Lifting and lowering operations for the seedling planting device 5, which is attached to the traveling machine so that it can be driven up and down, and on/off operations for the planting clutch 16 are performed at the raising operation position A and lowering operation position B for the seedling planting device 5, and the planting clutch 16. 16, which is configured to be operated by displacement of one operating lever 9 along a guide groove 19 provided with a series of entry operating positions C, Guide groove 19
To configure this, a straight first operating route R 1 is provided from the clutch engagement operating position C to the raising operating position _A , and a straight line is provided in the middle of the first operating route R ₁ and outside the first operating route R ₁ . and first and second lowering operation positions B ₁ and B ₂ are provided in series with each other in the lower position,
The second lowering operation position _B2 and the upper operation position A
In addition to providing a second operation path R ₂ over the course of
It is characterized by being provided with guide mechanisms 20 and 21 for displacing the operating lever 9 through the second operating path _R2 in the operation from the clutch engagement operating position C to the raising operating position A side. The structure of the operation part of the rice transplanter.