JPH0155848B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rice transplanter in which a seedling planting device is connected to a vehicle body so that it can be raised and lowered and rolled.
When planting multiple rows of seedlings at appropriate intervals in the width direction of the aircraft, the seedling planting device is automatically raised and lowered so that all of the multiple rows of seedlings to be planted can be planted at the desired depth. The purpose is to make it possible to carry out the rolling operation as desired without requiring any special operation even if the planting depth is changed and set.

Embodiments of the present invention will be described in detail below with reference to illustrative drawings.

As shown in Fig. 1, four mat-shaped panels are installed at the rear of the vehicle body, which is equipped with left and right front propulsion wheels 1, 1, left and right rear propulsion wheels 2, 2, an engine 3, a driver's seat 4, etc., which can be operated to change direction. The inclined seedling platform 5 is moved horizontally and back at a constant stroke with seedlings placed side by side, and one seedling is taken out one by one from the lower end of each of the pine-like seedlings while being circulated up and down. A seedling planting device 7 equipped with four planting claws 6, etc. for planting in a field is provided, and is configured to sequentially plant four rows of seedlings at appropriate intervals in the width direction as the machine advances. be.

As shown in FIGS. 1 and 2, a quadruple link mechanism 8 is connected to the rear end of the vehicle body so as to be movable up and down,
A portion of the seedling planting device 7 that is offset to the right from the lateral center position is pivotally supported to the rear end portion of the quadruple link mechanism 8 so as to be swingable around an axis X in the longitudinal direction. , a state in which the link mechanism 8 is extended so as to be forcibly raised relative to the vehicle body, a state in which the link mechanism 8 is freely retractable in order to lower it under its own weight, and a state in which it is hydraulically locked to stop the ascent and descent. A switchable single-acting first hydraulic cylinder 9 for lifting and lowering operations is provided, and the seedling planting device 7 is connected to a link mechanism 8.
A state in which the seedling planting device 7 is freely shortened so that it is forced to rotate clockwise by its own weight, and a state in which it is hydraulically locked to stop rotation. A single-acting second hydraulic cylinder 10 for rolling operation, which can be switched between two states, is provided, and the seedling planting device 7 is configured to be able to be moved up and down and rolled relative to the vehicle body.

As shown in FIG. 3, a pair of left and right swing arms 12a are mounted on a horizontal shaft 11 which is rotatably supported around an axis Y by the transmission case 7a of the seedling planting device 7, and are spaced apart from each other at an appropriate distance in the horizontal direction. , 12b are attached to the free ends of these arms 12a and 12b, and the rear end of the first float 13 for lifting/lowering control and the rear end of the second float 14 for rolling control are rotatable around the same horizontal axis Z. A swinging lever 16 that can be pivoted to the guide frame 15 and held at a desired swinging position is connected to the horizontal shaft 11 so that it can be rotated. The front end of the seedling planting device 7 is pivotally supported to be vertically swingable about the horizontal axis V, and the swinging arms 12a and 12b are swingable upwardly. The second float 1 is connected to a vertically swinging arm 18 linked to the horizontal shaft 11 via a link mechanism 17 through a link mechanism 19 that can be bent and extended.
The front end of each float 1 is connected to the seedling planting device 7 via a bendable link mechanism 20, and the front end of each float 1 is connected to the seedling planting device 7 via a bendable link mechanism 20.
The vertical position of the rear end portions 3 and 14 relative to the seedling planting device 7 can be changed and adjusted.

The bending/extension link mechanism 19 supporting the front end of the first float 13 is connected to the swinging arm 22 for operating the spool in the first control valve 21 of the first hydraulic cylinder 9, so that the front end of the first float 13 can be moved up and down. When the swing position is within the proper setting range, the wire changes to the lift stop operation position N, when the rise is out of the proper range, it is switched to the rise operation position U, and when the swing position is out of the proper range, it is switched to the lower operation position D. 23, and the seedling planting device 7 is automatically connected to the seedling planting device 7 based on the information of the first float 13 so as to maintain the vertical swing position of the first float 13 relative to the seedling planting device within a set range. a first potentiometer 24 that detects the vertical swing position of the first float 13 with respect to the swing arm 12a as the vertical swing position of the first float 13 relative to the seedling planting device; And, the vertical swing position of the second float 14 with respect to the swing arm 12b is adjusted to a second position.
A second potentiometer 25 is provided to detect the vertical swing position of the float 14 relative to the seedling planting device, and a mechanism 26 is provided to calculate the difference between the detection values of both potentiometers 24 and 25. Based on the calculation results, the second electromagnetic control valve 27 of the second hydraulic cylinder 10 is brought into a rotation stop operation state when the difference between the two detected values is within the set range, and When it is determined that the float 14 is swinging upward, the state is switched to the clockwise rotation operation state, and when it is also determined that the second float 14 is swinging downward relative to the first float 13, the switch is switched to the left rotation operation state. A valve operation circuit 28 is provided to automatically control the difference between the detection values of the first and second potentiometers 24 and 25 within a set range based on the information of both potentiometers 24 and 25. The seedling planting device 7 is configured to be capable of rolling operation.

In short, the operation of raising and lowering based on the information of the first float 13, and the operation of both potentiometers 24,
By cooperating with the rolling operation based on the information of 25, the seedling planting device 7
is maintained in a posture relative to the mud surface such that its entire width direction is at the desired height relative to the mud surface, and all of the multiple rows of seedlings to be planted at appropriate intervals in the width direction of the aircraft are planted at the desired depth. As mentioned above, by changing and adjusting the vertical swing position of the seedling planting device 7 at the rear end of both floats 13 and 14, the desired height of the seedling planting device 7 relative to the mud can be adjusted. In other words, it is configured so that the planting depth can be changed and set.

In addition, numeral 29 in the figure is a valve operating swing lever for manually operating the first control valve 21.

Incidentally, in carrying out the present invention, the first and second floats 13 and 14 may be configured to move up and down parallel to the seedling planting device 7.

Furthermore, the control mechanism for lifting and lowering may be configured to detect the vertical position of the first float 13 relative to the seedling planting device as an electrical signal, and to operate the lifting and lowering operation based on this detection signal.

In addition, in the embodiment, in order to change the planting depth, the swinging fulcrums of the first and second floats 13 and 14 that swing up and down with respect to the seedling planting device 7 are changed up and down. However, for example, in the structure of the embodiment, changing and adjusting the linking distance of the wire 23, etc.
Various structures are possible.

Further, the present invention provides the first and second floats 13, 14.
In addition, the present invention can also be applied to a rice transplanter in which one or more floats are installed in parallel.

In summary, the rice transplanter according to the present invention has the structure described above, in which the first float 13 for lifting control and the second float 14 for rolling control are movable horizontally relative to the seedling planting device 7. control for automatically raising and lowering the seedling planting device 7 based on information on the first float 13 so as to maintain the vertical position of the first float 13 relative to the seedling planting device within a set range; A mechanism is provided, and the difference between the detection value of the vertical position detection device 25 of the second float 14 and the detection value of the vertical position detection device 24 of the first float 13 is within a set range. Both the detection devices 2
The present invention is characterized in that it is provided with a control mechanism that automatically performs rolling operation of the seedling planting device 7 based on the information of items 4 and 25.

That is, an operation for automatically raising and lowering the seedling planting device 7 so as to maintain the vertical position of the first float 13 relative to the seedling planting device within a set range, and a second operation located laterally to the first float 13. In cooperation with the automatic rolling operation of the seedling planting device 7 so that the vertical position of the float 14 relative to the seedling planting device is aligned with the vertical position of the first float 13 relative to the seedling planting device, pitching of the vehicle body, Irrespective of the left and right inclination of the mud surface, the inclination of the mud surface, etc., the seedling planting device 7 can be maintained in a posture with respect to the mud surface such that its entire width direction is at a desired height with respect to the mud surface. When using a seedling planting device to plant seedlings under a plurality of conditions at appropriate intervals in the width direction of the aircraft, all of the multiple rows of seedlings to be planted can be planted at a desired depth. Moreover,
According to the present invention, in order to automatically perform the rolling operation as described above, the detected value of the second float 14 relative to the seedling planting device vertical position detection device 25 and the detection value of the first float 13 relative to the seedling planting device vertical position detection Since the seedling planting device 7 is operated in a rolling manner so as to maintain the difference with the detected value of the device 24 within a set range,
Even if the setting range of the vertical position of the seedling planting device in the first float 13 is changed and adjusted to change and set the planting depth, it is possible to perform the desired rolling operation without requiring any special operation. This has led to the development of a rice transplanter that is even more convenient to use.

[Brief explanation of drawings]

The drawings illustrate embodiments of the rice transplanter according to the present invention; FIG. 1 is a side view of the riding rice transplanter, FIG. 2 is a schematic front view of the rolling operation structure, and FIG. 3 is the first,
FIG. 6 is a diagram of the relationship between the second float and the first and second control valves. 7... Seedling planting device, 13... First float, 1
4...Second float, 24, 25...Vertical position detection device for seedling planting device.

Claims (1)

[Claims] 1 A rice transplanter in which a seedling planting device 7 is connected to a vehicle body so that it can be lifted and lowered and rolled, and a first float 13 for lifting and lowering control and a second float 14 for rolling control are connected to the seedling planting device 7. Device 7
, the first float 13 is installed side by side horizontally in a vertically movable state, and automatically based on the information of the first float 13 so as to maintain the vertical position of the first float 13 relative to the seedling planting device within a set range. A control mechanism for raising and lowering the seedling planting device 7 is provided, and a device 25 for detecting the vertical position of the second float 14 relative to the seedling planting device
The difference between the detection value of the first float 13 and the detection value of the vertical position detection device 24 of the seedling planting device of the first float 13 is maintained within a set range based on the information of both the detection devices 24 and 25. A rice transplanter characterized by being provided with a control mechanism for rolling operation of a seedling planting device 7.