JPH024248B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides 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 is provided for raising and lowering the float, and an elastic device for biasing the float downward is placed at a position immediately in front of the float to prevent the rocking of the mud hardness detection piece biased into the mud due to the increase in mud hardness. Along with,
The biasing force is increased.

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 has been made 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.

In the above-mentioned rice transplanter's seedling planting device lifting/lowering operating device, the present invention provides a stopper that restricts the return swing range of the mud hardness detection piece to the side of entry into the mud, relative to the mud hardness detection piece. The more the auxiliary mud hardness detection piece, which is pivotally supported to swing as the mud hardness increases when plunged into the mud at a location at an appropriate interval in the longitudinal direction or the width direction of the vehicle body, swings, the more the above-mentioned return occurs. It is characterized by being interlocked and connected so that a position change operation can be performed to change the rocking range to the backward side.

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

In other words, by means of the auxiliary mud hardness detecting piece provided at an appropriate interval in the width direction or longitudinal direction of the vehicle relative to the mud hardness detecting piece, the return rocking of the mud hardness detecting piece to the mud entry side is prevented. The stopper that regulates the movement range is designed to change its position so that the more the auxiliary mud hardness detection piece swings backward, the more the return swing range is changed to the backward side. Even if the mud hardness detection piece enters a recess that exists in the field area, the action of the auxiliary mud hardness detection piece and the stopper prevents the mud hardness detection piece from swinging forward. This makes it possible to prevent the biasing force of the elastic tool from becoming unnecessarily small, and the above-mentioned inconvenience can now be avoided.

Moreover, according to the present invention, it is suppressed as much as possible that the downward biasing elastic device is changed to increase the biasing force for the auxiliary mud hardness detection piece, and the downward biasing elastic device is mainly controlled by the mud hardness detection piece. Since the downward biasing elastic device is operated, there is an advantage that the downward biasing force of the float can be easily maintained at a force corresponding to the hardness of the field area through which the float passes. More specifically, as a means for achieving the object of the present invention, each of the mud hardness detection piece and the auxiliary mud hardness detection piece is rocked backward by the same amount due to contact with mud of the same hardness. , and one of them that has swung backwards significantly can be provided in a state where it operates the downward biasing force elastic device, but in this case, the auxiliary mud hardness detection piece is used for the hard ground area. When the float is swung backwards more than the detection piece, the downward biasing force of the float is
There is a disadvantage that the value is unnecessarily larger than the value that should be achieved in the mud hardness detection piece, resulting in unnecessary deep planting.

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

As shown in FIGS. 1 and 2, left and right front wheels 1,
1. At the rear of the vehicle body equipped with 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, and a pine-shaped seedling stand placed on this seedling stand 5. Seedling planting device 7 equipped with five planting claws 6, etc., which take out seedlings one by one and plant them in the field while circulating up and down along the lower end row of seedlings.
The structure is such that seedlings are planted sequentially 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 Figures 2 and 3, three floats 10, 10A, 10A level the field for planting seedlings.
The rear end of the float is rotatably supported around the horizontal axis X relative to the seedling planting device 7, and the front end of the float is interlocked and connected to the seedling planting device 7 via a bendable link mechanism 11. It has been done. Then, the three floats 1
0..., the link mechanism 11 for the center float 10 is urged toward extension, and the center float 1
A spring 12 is provided to elastically bias the hydraulic cylinder 9 downward, and a swing operating arm 14 of a control valve 13 that switches the operating state of the hydraulic cylinder 9 and a link mechanism 11 for the central float 10 are interlocked by a wire 15. When the swing position of the seedling planting device of the float 10 is within the proper range, the control valve 13 is brought into an up/down state where the operation of the hydraulic cylinder 9 is stopped, and when the swing position of the float 10 is out of the proper range, , when the control valve 13 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 13
The seedling planting device 7 is operated by shortening the hydraulic cylinder 9.
The seedling planting device can be automatically switched to a lowered state, and the swinging position of the float 10 relative to the seedling planting device can be 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 relative to the mud is detected based on the vertical movement of the float 10, and the seedling planting device 7 is automatically raised and lowered to maintain a constant depth of the planting device. be.

As shown in FIGS. 2 to 4, a mud hardness detection piece 16 is attached to an arm 17 extending from the seedling planting device 7 at a position immediately in front of the float 10 with respect to the horizontal axis 17A of the support. It is pivoted so that it swings backward as the mud hardness increases when it is plunged inside, and
The detection piece 16 is provided in a state where it is elastically biased by a spring 18 toward the entry into the mud, and is also provided in a state in which it is interlocked and connected to one end of the float downward biasing spring 12 via a release wire 19. The spring 12 is configured to be able to be operated to increase the biasing force as it swings backward.
In short, the structure is such that the downward biasing force of the float 10 can be automatically changed to a force corresponding to the hardness of the mud.

Auxiliary mud hardness detection pieces 16A, 16A are located on both sides of the mud hardness detection piece 16 at appropriate intervals.
are pivoted to the horizontal shaft 17A so as to swing backward as the mud hardness increases when plunged into the mud, and have a biasing force greater than that of the mud hardness detection piece 16. The front side of the mud hardness detecting piece 16 is installed in a state where it is elastically biased by a spring 18A toward the mud plunge side, and receives the pin 20 that swings together with the mud hardness detecting piece 16. The tongue pieces 21, 21 with long holes for pin engagement are used as stoppers for regulating the return swing range to the auxiliary mud hardness detection piece 1.
6A and 16A, so that the more it is swung backwards, the position is changed to change the restricted return oscillation range to the backward side. It is configured to prevent the piece 16 from thrusting into a recess existing in the field area and swinging forward significantly, thereby preventing the downward biasing force of the float 10 from becoming unnecessarily small. be.

Reference numeral 26 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 27 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.

To implement the present invention, the auxiliary mud hardness detection piece 16A
may be provided in front of the mud hardness detection piece 16. That is, as shown in FIG. 5, for example, each of the detection pieces 16, 16A, 16A is separately pivoted to an arm 22 extending from the seedling planting device 7, and one end of the spring 12 for biasing the float downwards. A link 24 which is interlockingly connected to the arm 22 via a release wire 23 is pivotally supported to be able to swing back and forth, and each detection piece 16 is attached to a rod 25 with a long hole for forming a stopper which is pivotally connected to the link 24. ,16
An attached pin may be inserted into the upper end of A, 16A.

Also, the number of auxiliary mud hardness detection pieces 16A... to be provided is as follows:
Various changes are possible, such as providing one or three or more.

In addition, in order to support the float 10 so that it can move up and down,
Various modifications are possible, such as supporting it so that it can swing up and down using the front end as a fulcrum, or supporting it so that it can move up and down in parallel.

Further, the specific configuration of the elevation control mechanism can be modified in various ways, such as by electrically detecting the vertical movement position of the float 10 and electromagnetically operating the control valve 13.

[Brief explanation of drawings]

Figure 1 is a side view of the riding rice transplanter, Figure 2 is a schematic plan view of the seedling planting device, Figure 3 is a schematic diagram of the lifting operation device, and Figure 4 is the mounting structure of the mud hardness detection piece. The perspective view, FIG. 5, is a side view of another embodiment. 7...Seedling planting device, 10...Float, 12...
...Elastic tool for downward bias, 16...Mud hardness detection piece, 1
6A...Auxiliary mud hardness detection piece, 21...Stopper.

Claims (1)

[Claims] 1. 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 the elastic device 12 for biasing the float 10 downward
With the rocking of the mud hardness detection piece 16 forced into the mud at the location just before 0, due to the increase in mud hardness,
A raising and lowering operation device for a seedling planting device of a rice transplanter which is interlocked and connected so that the biasing force can be changed to increase the biasing force,
A stopper 21 that restricts the return swing range of the mud hardness detection piece 16 toward the mud entry side is provided at an appropriate interval from the mud hardness detection piece 16 in the longitudinal direction of the vehicle body or the width direction of the vehicle body. The more the auxiliary mud hardness detection piece 16A, which is pivotally supported to swing as the mud hardness increases in the state of plunged into the mud, swings, the more the position change operation is performed to change the return swing range to the backward side. 1. A lifting and lowering operation device for a seedling planting device of a rice transplanter, characterized in that the raising and lowering operation device for a seedling planting device of a rice transplanter is interlocked so as to be connected to each other.