JPH025695Y2 - - 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 is provided, and an elastic member for biasing the float downward,
This invention relates to a device that is interlocked and connected so that the increasing biasing force can be changed as the mud hardness detection piece that is biased into the mud is swung due to the increase in mud hardness.

In such a device for lifting and lowering a seedling planting device, as the mud hardness detection piece enters a recess existing in the field area and swings into the mud, an elastic device for biasing downward becomes unnecessary. There is a risk that the biasing force may be reduced and manipulated, and as a result, as the float whose descending biasing force is weakened moves upward, the seedling planting device may be unnecessarily manipulated upward, and the desired planting depth may not be achieved. This resulted in shallower planting, which caused the inconvenience of falling seedlings and floating seedlings.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to prevent the downward biasing elastic device from being unnecessarily operated to reduce the biasing force by simple modification. The point is to suppress it.

The present invention is a device for raising and lowering the seedling planting device of the rice transplanter described above, in which the mud hardness detection pieces are separated at appropriate intervals in the width direction of the vehicle body or in the longitudinal direction of the vehicle body, and can be swung separately. A plurality of mud hardness detection pieces are provided in a state of being pivotally supported, and a spring is provided which elastically biases each of the plurality of mud hardness detection pieces with the same biasing force toward the entry into the mud, and the plurality of mud hardness detection pieces are provided. The downward biasing elastic device and the plurality of mud hardness detection pieces are connected to the plurality of mud hardness detection pieces so that only the one that swings the maximum among the pieces acts on the downward biasing elastic device. The present invention is characterized in that it is provided with a mechanism that interlocks and connects the hardness detection pieces in a state that allows relative rocking of the hardness detection pieces.

Next, the effects of the feature configuration of the present invention will be described.

In other words, the downward biasing elastic device should be operated by the one that swings the most out of a plurality of mud hardness detection pieces provided at appropriate intervals in the vehicle width direction or vehicle body longitudinal direction. Because it is something that
Even if one of the mud hardness detection pieces that swings separately enters a recess that exists in the field area and swings toward entering the mud, it will not move into the recess. By operating the downward biasing elastic device using the other mud hardness detection piece that is not included, the biasing force of the downward biasing elastic device can be maintained at an appropriate level, thereby suppressing the above-mentioned inconvenience. As a result, a device for raising and lowering the seedling planting device of a rice transplanter, which can be used even better, 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.

A tank 10 for storing granular fertilizer is provided at the rear of the vehicle body, and a trencher 11A that also serves as a fertilizer release tool uses the planting claws 6 to form a trench on the side of the field where the planting is planned. and a pipe 11 for guiding and supplying the fertilizer in the tank 10 to the pipe 1.
1 is provided with a rotary roll 12 that feeds out a constant amount so that fertilizer for seedling growth can be supplied to the field near the planned planting site. An auxiliary tank 13 for storing fertilizer to be supplied to the tank 10 is provided at the front part of the vehicle body,
A pipe 14 for guiding and supplying fertilizer from the auxiliary tank 13 into the tank 10 is provided, and the auxiliary tank 13
The electric air pump 15 for pumping and supplying the fertilizer from the tank 10 into the tank 10 along the pipe 14 is activated by the detection operation of the first limit switch 16a which detects when the fertilizer in the tank 10 has fallen below a set level. Therefore, it is provided in such a state that it is activated and stopped by the detection operation of the second limit switch 16b which detects that the fertilizer in the tank 10 has reached the full level. The structure is such that the fertilizer in the auxiliary tank 13 can be automatically supplied into the tank 10 when there is little fertilizer left.

As shown in FIG. 2, the rear ends of three floats 17 for leveling the field for seedling planting are pivotably supported around the horizontal axis X with respect to the seedling planting device 7, and the front ends of the floats are interlocked and connected to the seedling planting device 7 via a bendable link mechanism 18, and the link mechanism 18 for the center float 17 of the three floats 17 is biased toward extension. float 1
A spring 19 is provided to elastically bias the hydraulic cylinder 7 downward, and a swing operating arm 21 of a control valve 20 that switches the operating state of the hydraulic cylinder 9 and a link mechanism 18 to the central float 17 are linked by a wire 22. When the swing position of the float 17 for the seedling planting device is within the appropriate range, the control valve 20 is brought into a lifting stop state that stops the operation of the hydraulic cylinder 9, and when the lifting position is out of the appropriate range. , when the control valve 20 is brought into a state where the hydraulic cylinder 9 is extended and the seedling planting device 7 is raised, and when the descent is further out of the proper range, the control valve 20
The seedling planting device 7 is operated by shortening the hydraulic cylinder 9.
The seedling planting device swing position of the float 17 relative to the seedling planting device is automatically maintained within a set range to maintain a constant planting depth. It is configured so as to

In short, the height of the seedling planting device 7 relative to the mud is detected based on the vertical movement of the float 17, and the seedling planting device 7 is automatically raised and lowered to maintain a constant planting depth. be.

In addition, as shown in FIGS. 2 and 3, three mud hardness detection pieces 23 are thrust into the mud at a location directly in front of the center float 17 and swing backward as the hardness of the mud increases. are separately pivotably supported on support arms 24 extending from the seedling planting device 7 at appropriate intervals in the longitudinal direction of the vehicle body, and each of the mud hardness detection pieces 23 is applied with the same biasing force. A spring 25 is provided separately for elastically biasing the float when it enters the mud, and a link 27, which is interlocked and connected via a release wire 26 to one end of the float downward biasing spring 19, is attached to the support arm 24 so as to swing back and forth. A rod 28 is movably pivoted and pivotally connected to the link 27;
A long hole 29 is formed in which the upper end of each of the detection pieces 23 is inserted using a pin in a state that allows relative rocking thereof, so that the maximum backward swing of each of the detection pieces 23 The spring 19 is configured such that the spring 19 can be operated to increase the biasing force as each detection piece 23 swings backward while the sensor is operated.

In short, the downward biasing force of the float 17 can be automatically changed to a force corresponding to the hardness of the mud, and furthermore, because of the recesses that exist in the field area, any one of the detection pieces 23 is in the mud. Even if the float 17 swings toward the entrance, the downward biasing force of the float 17 can be maintained at an appropriate level by the other detection piece 23.

Reference numeral 30 in the figure is a manual lift lever that locks and swings the spool of the control valve 20, which is biased toward the lowering operation by the float 17, to the upper operation using the locking arm 31. , a raised position U, a raised/lowered stop position N, a lowered position D, and a position A in which the control valve 20 is made freely operable and automatically operated by the float 17 as described above.

In carrying out the present invention, the number of mud hardness detection pieces 23 can be changed in various ways, such as two or four or more pieces. And mud hardness detection piece 23
The position where the mud hardness detection piece 23 is provided can be changed in various ways, for example, by providing it at the front part of the float 17 at appropriate intervals in the width direction of the vehicle body.

In addition, in order to construct a mechanism for interlocking and connecting the float downward biasing elastic member 19 and the mud hardness detection piece 23, a rod 28 with a long hole 29 is provided, and for example, a rod 28 with a long hole 29 is provided, and, for example, a rod 28 with a long hole 29 is provided. Various modifications can be made, such as providing a wire that is interlocked and connected to the downward biasing elastic member 19 using a long hole to provide interlocking flexibility.

Further, in order to support the float 17 so that it can move up and down, various modifications can be made, such as supporting it so that it can swing up and down using its front end as a fulcrum, or supporting it so that it can move up and down in parallel.

Furthermore, the specific configuration of the elevation control mechanism can be modified in various ways, such as by electrically detecting the vertical position of the float 17 and electromagnetically operating the control valve 20.

[Brief explanation of the drawing]

FIG. 1 is a side view of the riding rice transplanter, FIG. 2 is a schematic diagram of the lifting/lowering operation device, and FIG. 3 is a perspective view showing the mounting portion of the mud hardness detection piece. 7...Seedling planting device, 17...Float, 19...
... Elastic tool for downward bias, 23 ... Mud hardness detection piece, 2
5...Spring.

Claims (1)

[Scope of utility model registration request] The float 17 is attached to the seedling planting device 7 so as to be movable up and down and biased downward, and the float 17 is automatically attached to the seedling planting device 7 so as to maintain the vertical position of the float 17 relative to the seedling planting device within a set range. A control mechanism is provided to raise and lower the seedling planting device 7 with respect to the vehicle body, and the elastic device 19 for biasing the float 17 downward increases the mud hardness of the mud hardness detection piece 23 pushed into the 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 biasing force is changed to the side that increases as a result of the rocking caused by the movement of the soil. With appropriate spacing in the front and back direction,
In addition, a plurality of mud hardness detection pieces 23 are separately provided in a swingably supported state, and a spring 25 is provided which elastically biases each of the plurality of mud hardness detection pieces 23 with the same biasing force toward the plunge into the mud. , the plurality of mud hardness detection pieces 2
The downward biasing elastic device 19 and the plurality of mud hardness detection pieces 23 are connected to each other so that only one of the three that has swung to the maximum acts on the downward biasing elastic device 19. A device for raising and lowering a seedling planting device for a rice transplanter, characterized in that it is provided with a mechanism that interlocks and connects the mud hardness detection pieces 23 in a state that allows relative rocking thereof.