JPS6025083B2 - Rice transplanter's planting device lifting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a control valve that can be manually operated for a drive cylinder for raising and lowering a planting device with respect to this machine, and a bar that allows the planting device to be operated based on this lever operation. The present invention relates to a planting device lifting mechanism for a rice transplanter, which is provided with a rod member for feeding back the lifting displacement to the valve to stop and hold the planting device at a height corresponding to the operating position of the lever.

For example, when raising the planting equipment above the ground due to the rotation of the machine in the field machine, which is done many times during work, the time required to raise and lower the planting equipment can be shortened as much as possible to improve the overall efficiency of the work. In order to do this, it is desirable to minimize the height position of the planting device, but the minimum height position of the planting device cannot be uniformly determined.

For example, if the seedlings on the seedling stand are not slippery and there is no risk of them slipping even if the position of the seedling stand is a little steep, the height should be as low as possible without coming into contact with the muddy surface. On the other hand, in the case of slippery seedlings, it is necessary to raise the height of the seedling stand so that it does not slip off unexpectedly when it is raised, and that the tilted position of the seedling stand is sufficiently gentle. The required minimum height position varies depending on the working conditions, as the required height varies depending on the depth of the tiller. Raising the planting device to various height positions in this way is very inconvenient in terms of operation, as it is likely to cause malfunctions, especially for experienced husbands, if this is done only by operating the lever. In view of this, an object of the present invention is to enable accurate and easy lifting of the planting bag to the minimum required height position in accordance with various work conditions when the aircraft turns. have

The planting device lifting mechanism of the rice transplanter according to the present invention, as explained at the beginning, determines the mounting position of the rod material relative to the displacement member on the planting device side or the planting material integrally interlocked with the valve based on the unit operation amount of the lever. The present invention is characterized in that it is configured to be adjustable so that the ratio to the amount of elevation of the planting bag hawk can be changed, and the length of the rod material can be changed and fixed.

That is, by adjusting the mounting position of the rod material and changing the length of the rod material, it is possible to set and adjust the height position of the planting device that corresponds to the operating position of the lever. is displayed so that the lever can be operated reliably and easily when turning, and the height of the planting device that corresponds to the set lever operation position can be adjusted according to the work conditions described above. It can be adjusted to the appropriate one, and therefore the planting equipment can be reliably and precisely raised and stopped at a necessary and sufficient height position according to the work conditions, while maintaining easy bar operation at all times. We were able to improve efficiency.

Hereinafter, an embodiment of the present invention will be described based on the drawings. At the rear of the riding machine 1, there is a seedling stand 2 in a forward posture, a planting claw 3, and a planting claw 3.
In this riding rice transplanter, a five-row planting device 5 equipped with four groups of soil leveling floats is connected so as to be movable up and down. A mechanism is provided to link the depth detection register 7 and a manual operation lever 9 provided near the driver's seat 8.

The drive elevating mechanism 6 extends rearward from a bridge support shaft 10 rotatably supported by the main machine 1 while rotating integrally therewith, and has an upper portion pivotally connected to the planting device 5 at its rear end. Link 1 1, in a posture parallel to 1, is pivotally connected at its front end to the lower end of a binding link 12 that can swing freely relative to the sun-moving support 10', and is planted at its rear end. Lower link 1 pivotally connected to device 5
3, the vertical link 1
2 and the lower link 13 to the main body 1 side fixed part and the biasing action due to the weight of the planting device 5, the pivot connection part 16 is moved around the bridge support 10. A hydraulic cylinder 15 for driving the link mechanism A is installed between the free end of the link arm 14 that is fixedly extended from the support shaft 10 and the fixing section for one leg of the machine. The planting rhombus 5 should be raised and lowered by the drive parallel swing movement of the link mechanism A.

Furthermore, this drive elevating mechanism 6 is provided between the pivot support lid connection part 16 and the link machine total arm 14 in the lower planting depth adjustment area of the entire elevating area of the planting device 5. In a region above this that allows the parallel rocking motion of the mechanism A, there is a support member 18 attached to the tip of the tension rod 17 extending from the pivot connection portion 16.
By rearranging the link arm 14 and swinging the pin support connecting portion 16, that is, the vertical link 12 around the Sun Qin support shaft 10, the parallel swing movement of the link mechanism A is controlled by the entire link mechanism A. A mechanism 19 is provided that converts the movement into a rotating movement around the swinging support shaft 10, so that in the lower region, the parallel swinging movement of the link mechanism A maintains the posture of the planted diamond counterfeit 6 with respect to the machine. , and in the upper region, the rotation of the entire link mechanism A causes the planting device 5 to be moved relative to the machine 1 so that the angle of inclination of the seedling stand 2 of the planting device 6 to the ground gradually decreases as it goes upward. It is configured to be driven up and down. The movement conversion mechanism 19 is a nut that screws the drum drum member 18 onto the tension rod 17, and by changing the position of the drum drum member 18 in the longitudinal direction of the rod, the link arm 14 is attached to the saddle pad member 18. The structure is such that the height position of the link mechanism A can be changed to change the movement conversion position when hitting the target. The plowing depth detection device 7 is provided with the float 4 so as to be able to swing up and down with the vicinity of its rear end as a fulcrum, and the float 4 is biased to swing in the ground contact direction (downward) with a set pressure. , a setting spring 20 is provided to make the float 4 swing to follow ground pressure fluctuations caused by changes in the plowing depth (changes in the planting depth). It is configured to detect the depth of the tiller by swinging.

As shown in FIGS. 3 to 7, the linkage mechanism connects the control valve 21 for the hydraulic cylinder 15 using a three-position switching valve and the sensor float 4 to the sensor float 4 in the lower area. Valve 2 is set so that the planting depth is maintained at the set depth based on the detection result of float 4.
1 are interlocked and connected for automatic control, while the valve 21
When the lever 9 is at one end position P of its operation path, the lever 9 and the vertical link 12 of the link mechanism A allow the valve 21 to operate in conjunction with the sensor float 4, and the lever 9 is at the one end position P. When the position is other than position P, the interlocking operation of the valve 21 with respect to the sensor float 4 is cut off in the upper region, and at the same time, the planting bag hawk is set at a height commensurate with the amount of operation of the lever 9 from the one end position P. 5 are linked together in such a way that they are automatically raised and lowered and stopped and held at that position. Specifically, they are constructed as follows.

In other words, as described above, the valve 21 and the sensor float 4
A first linking rod R is provided, and a connecting point a between the first linking rod R and the valve 21 is provided.
A member 22 that can swing with a seesaw using the lever as a fulcrum, and a lever 9
By pressing one end of this seesaw swinging member 22 based on the operation, the seesaw swinging member 22 resists the pressing force of the setting spring 20 acting on the connection point
The lever 9 is connected to the second linking rod R2, which can switch the valve 21 to the raised state by swinging the lever around the end of the pond.
The other end of the scene-spreading member 22 is moved as the vertical link 12 of the link mechanism A in the link mechanism A moves upward and oscillated around the Sun Qin support shaft 10 based on the operation, and the pressing force of one end by the lever 9 increases as described above. In a state where the pressing force of the setting spring 20 acting on the connection point a is greater than that of the setting spring 20, the seesaw swinging member 22 is moved to the connection point a while the valve 21 is held in the raised state.
The seesaw swinging member 22 is rocked around one end, and when the end pushing force becomes smaller than the connecting point pushing force in this scene-accompanying the swinging, the seesaw swinging member 22 is rocked around one end, and the valve 21 A feedback mechanism is provided that causes the operating position of the lever 9 to correspond to the lifting/lowering stop position of the planting device 5 by switching the lever to a neutral (lifting/lowering stopped) state.

In addition, in the linkage mechanism between the lever 9 and the valve 21, the lever 9 is elastically deformed in accordance with the amount of operation as the lever 9 is operated, thereby allowing the lever 9 to be operated in advance to a predetermined position, and also allowing the lever 9 to be operated in advance to a predetermined position. A spring 23 is provided that applies a valve actuation force of a magnitude that matches the amount of operation, and that reduces the applied valve actuation force as the planting device 5 actually moves up and down. The feedback mechanism described above is based on the vertical link 12
The free end portion of the first rod member R3 that is interlocked with the above-mentioned seesaw swinging member 22 is operatively connected to the bridge link 24 that is interlocked with the other end portion of the seesaw swinging member 22 via the second rod member R'3. . The swing link 24 is provided with three mounting holes b at intervals in the swing radius direction for connecting the free end of the first rod member R3 with a pin, and these mounting holes b... By selecting , the attachment position of the first rod material R3 to the disturbance link 24 can be adjusted so that the ratio between the unit operation amount of the lever 9 and the lifting base of the planting device 5 can be changed. A turnbuckle T is interposed between the second rod R3', and the length of the second rod R can be changed and fixed, as shown in FIGS. 8 and 9. Adjusting the attachment position of the first rod member R3 to the swing link 24;
By changing the length of the second rod R'3, the height position of the planting device 5 corresponding to the lever operation position can be changed.

Therefore, even if the lever operation position P' for lifting the planting bag directly when the aircraft turns is set, the setting can be changed by adjusting the installation position of the first rod R3 and changing the length of the second rod R'3. The height of the planting device 5 relative to the lever operating position P' can be adjusted. In addition, the first rod material R3
By adjusting the attachment position to the vertical link 12 or adjusting the attachment position of the second rod R'3 to the swing link 24 or the seesaw swing part village 22, the unit operation amount of the lever 9 and the planting device 5 can be adjusted. It may be configured to change the ratio to the amount of elevation, or
The length of the first rod member R3 may be changed and fixed.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the lifting mechanism of the planting device of the rice transplanter according to the present invention, and FIG. 1 is an overall side view of the rice transplanter, FIG. 2 is an enlarged side view with a portion of the main part cut away, and FIG. 1 is a perspective view of the main mechanism, and FIGS. 4 to 9 are explanatory views of the operation of raising and lowering the planting device. 1... This machine, 5... Planting device, 12
...Change part village, 15... Drive cylinder, 2
1...Control valve, 9...Lever,
24... Member, R3... Rod material. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. A lever 9 is provided with which the control valve 21 for the drive cylinder 15 for raising and lowering the planting device 5 can be manually operated with respect to this machine 1, and the raising and lowering displacement of the planting device 5 based on the operation of this lever 9 is controlled. The valve 21
In a rice transplanter's planting device elevating mechanism, which is provided with a rod R_3 for stopping and holding the planting device 5 at a height position corresponding to the operating position of the lever 9 in response to feedback from the rod material R_3, Planting device 5
The mounting position with respect to the side displacement member 12 or the member 24 integrally interlocked with the valve 21 is configured to be adjustable so that the ratio between the unit operation amount of the lever 9 and the lifting amount of the planting device 5 can be changed, and A lifting mechanism for a planting device of a rice transplanter, characterized in that the length of rod material R_3 can be changed and fixed.