JPH025693Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a rice transplanter that can maintain a constant planting depth regardless of pitching of the vehicle body, etc., and regardless of changes in mud hardness in the field to be planted. For details regarding the planting equipment lifting/lowering operation device, please refer to the float.
The seedling planting device is attached to the seedling planting device so that it can move up and down and is biased downward, and the seedling planting device is automatically attached to the vehicle body so that the vertical position of the float relative to the seedling planting device is maintained within a set range. a control mechanism for raising and lowering the float, and an elastic member for biasing the float downward;
The mud hardness detection piece is pivoted so that it can swing back and forth so that it swings back and forth when it comes into contact with the mud as the aircraft advances while it is plunged into the mud at a location directly in front of the float. The present invention relates to a lifting and lowering operation device for a seedling planting device of a rice transplanter that is interlocked and connected so that the biasing force is increased as it swings.

In such a device for lifting and lowering a seedling planting device, foreign matter such as straw waste present in the field area may get caught and adhere to the front surface of the mud hardness detection piece. If a large amount of foreign matter adheres, not only will the mud hardness detection piece unnecessarily swing back and forth, but there is also the risk that the posture of the already planted seedlings will be disturbed due to the mud being pushed by the attached foreign matter. However, it is necessary to remove the attached foreign matter from the mud hardness detection piece as soon as possible.
The foreign matter attached to the mud hardness detection piece was difficult to remove easily.

The present invention has been developed with the above-mentioned circumstances in mind, and its purpose is to make it possible to quickly remove foreign objects attached to the mud hardness detection piece through simple modification. It is in.

The characteristic configuration of the present invention is that in the above-mentioned raising/lowering operation device for the seedling planting device of the rice transplanter, when the mud hardness detection piece is swung backward over a predetermined range in a state of being plunged into the mud, the float The float is arranged in close proximity to the float so as to contact and press the float upward.

In other words, if the mud hardness detection piece plunges into the mud due to a foreign object and swings backward beyond the set range, it contacts and presses the float upward, and as the seedling planting device rises, it detects the mud hardness. Since the detection piece can be raised above the ground to separate it from the foreign matter attached to it, the foreign matter attached to the mud hardness detection piece can be quickly removed, thereby eliminating any inconvenience caused in the future. A device for raising and lowering the seedling planting device of a rice transplanter, which can be used more effectively by suppressing the problem, has been obtained.

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

As shown in FIG. 1, at the rear of the vehicle body, which is equipped with left and right front wheels 1, 1, left and right rear wheels 2, 2, an engine 3, a driver's seat 4, etc., there is a slanted seedling stand 5 that is reciprocated horizontally with a constant stroke; Five planting claws 6 are provided for picking out seedlings one by one and planting them in the field while circulating up and down along the lower end row of pine-shaped seedlings placed on the seedling platform 5. A seedling planting device 7 is provided to sequentially plant seedlings as the aircraft advances.

The seedling planting device 7 is connected to the vehicle body via a quadruple link mechanism 8 so as to be movable up and down in a parallel position, and a hydraulic cylinder 9 is provided for raising and lowering the link mechanism 8 with respect to the vehicle body, Also,
The seedling planting device 7 is configured to be able to be raised and lowered relative to the vehicle body by extending and contracting the hydraulic cylinder 9.

As shown in FIG. 2, the rear end of a float 10 for leveling the field for planting seedlings is pivoted to the seedling planting device 7 so as to be rotatable around the horizontal axis Link mechanism 1 that can be bent and extended with respect to the planting device 7
a control valve 13 for switching the operating state of the hydraulic cylinder 9; and a control valve 13 for switching the operating state of the hydraulic cylinder 9. The swing operation arm 14 and the link mechanism 11 for the central float 10 are interlocked and connected by a wire 15, and when the swing position of the float 10 relative to the seedling planting device is within the appropriate range, the control valve 13 is activated. When the hydraulic cylinder 9 is in the lifting stop state in which the operation of the hydraulic cylinder 9 is stopped, and the upward movement is out of the proper range, the control valve 13 is changed to the state in which the hydraulic cylinder 9 is extended and the seedling planting device 7 is raised, and further within the proper range. When the seedling planting device 7 is lowered, the control valve 13 is automatically switched to a state in which the hydraulic cylinder 9 is shortened and the seedling planting device 7 is lowered. The planting depth is made constant by automatically maintaining the swinging position of the attachment device within a set range.

In short, the seedling planting device 7 is automatically raised and lowered to stabilize the planting depth while detecting the immediate soil surface height of the seedling planting device based on the vertical movement of the float 10. .

Further, the mud hardness detection piece 16 is placed on the arm 17 fixed to the seedling planting device 7 by the central float 10.
It is pivoted so that it can swing back and forth so that it can swing backwards when it comes into contact with the mud as the aircraft advances while plunged into the mud, and is biased forward by a spring 16a. At the same time, the mud hardness detection piece 16 is provided with a release so that the biasing force of the piece 16 can be changed to increase as the float is swung backward relative to one end of the float downward biasing spring 12. They are interlocked and connected via a wire 18, so that the downward biasing force of the float 10 can be automatically changed to a force corresponding to the hardness of the mud.

Further, the float 10 is arranged so that as the mud hardness detection piece 16 is swung backward beyond a predetermined range while plunged into the mud, the front end of the central float 10 is brought into contact with and pressed upward. If the mud hardness detection piece plunges into the mud due to a foreign object and swings backward beyond the set range, the float will come into contact with and press the float upward, as shown in Figure 3. As the seedling planting device 7 rises, the mud hardness detection piece 16 is raised above the ground to separate from the foreign matter attached to it, so that the foreign matter attached to the mud hardness detection piece 16 can be easily removed at an early stage. It is configured.

Reference numeral 19 in the figure is a manual lift lever that locks and swings the spool of the control valve 13, which is biased by the float 10 in the direction of the downward operation, with the locking arm 22, in the direction of the upward movement. , a raised position U, a raised/lowered stop position N, a lowered position D, and a position A in which the control valve 13 is made freely operable and automatically operated by the float 10 as described above.

In carrying out the present invention, the structure for supporting the float 10 so that it can move up and down can be modified in various ways, such as supporting it so that it can move up and down in parallel.

In addition, in constructing the elevation control mechanism, for example, the vertical movement position of the float 10 is electrically detected and the control valve 1 is
The specific configuration can be changed in various ways, such as having 3 operated electromagnetically.

[Brief explanation of the drawing]

FIG. 1 is a side view of the riding-type rice transplanter, FIG. 2 is a schematic diagram of the raising and lowering operation device of the seedling planting device, and FIG. 3 is a side view of the rice transplanter in an operating state. 7...Seedling planting device, 10...Float, 12...
...Elastic tool for biasing the float downward, 16...Mud hardness detection piece.

Claims (1)

[Scope of utility model registration request] The float 10 is attached to the seedling planting device 7 so as to be movable up and down and biased downward, and the float 10 is automatically attached to the seedling planting device 7 so as to maintain the vertical position of the float 10 relative to the seedling planting device within a set range. A control mechanism for raising and lowering the seedling planting device 7 with respect to the vehicle body is provided, and an elastic device 12 for biasing the float 10 downward is used to prevent the vehicle from proceeding when it plunges into mud at a position directly in front of the float 10. A mud hardness detection piece 16 is pivotally supported so that it can swing back and forth so that it swings backwards when it comes into contact with mud.
The device is a lifting and lowering operating device for a seedling planting device of a rice transplanter which is interlocked and connected so that the more the device swings backward, the more the biasing force is increased. When the float 10 is swung backward by more than a set range in the state where the float 10 is plunged into the
the float 1 so as to contact and press it upward.
1. A raising/lowering operating device for a seedling planting device of a rice transplanter, characterized in that the raising and lowering operation device is arranged in close proximity to the seedling planting device of a rice transplanter.