JPS634B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a rice transplanter, and more particularly to a lift control device that adjusts the vertical distance between the float and the main body of the planting device to adjust the planting depth of seedlings and the orientation of the float.

[Prior art] As a conventionally well-known rice transplanter, there is a
A rice transplanting device with a float on the lower side is installed so that it can move up and down using a hydraulic cylinder. Some rice transplanters are equipped with a control device that expands and contracts the hydraulic cylinder, and this control device moves the rice transplanter up and down. It is also well known that the planting depth of seedlings can be adjusted by adjusting the planting depth.

[Problems to be solved by the invention]

By the way, farmers using rice transplanters need to adjust the planting depth of seedlings depending on the height and quality of the seedlings, the hardness and softness of the field, and other circumstances. When this happens, the distance between the implant attached to the rice transplanting device body and the field surface changes, so the planting depth changes, but the orientation of the tip of the float also changes at the same time. Then, if the heading angle is large, the float will not only push the cultivated soil, resulting in a large propulsion resistance but also a mud pushing phenomenon that pushes the cultivated soil away.If the heading angle is small, only the front part of the float will push the soil away. There was a problem that the soil leveling performance could not be achieved due to contact with cultivated soil. In addition, when attempting to uniformize the planting depth of seedlings by detecting the vertical movement of the front part of the float and moving the rice transplanter up and down to keep the ground pressure of the float constant at all times, it is possible to When this happens, the vertical movement becomes abnormal, causing a problem in which the vertical movement of the rice transplanting device malfunctions. Therefore, when adjusting the implantation depth, it has been desired to always adjust the parallelism of the float and the detection of vertical movement on the front side.

[Means to solve the problem]

Therefore, in the present invention, a rice transplanting device 5 equipped with a plurality of floats 7 on the lower side is attached to the rear of the traveling vehicle body 1, and this rice transplanting device 5 can be moved up and down depending on the amount of oil in the hydraulic cylinder 3. The float 7 or a part of the float 7a is connected to the frame by a link at its rear end, and can be moved up and down by operating a lever 19, and can also move around a rotation axis 25 at its rear. This is connected to a control device 11 that detects the amount of oil in the hydraulic cylinder 3 on the front side and changes the amount of oil in the hydraulic cylinder 3, and this control device 11 moves as the rear end of the float 7a moves by operating a lever 19. Changing the planting depth and changing the float 7a accordingly
An object of the present invention is to provide a lifting control device for a rice transplanter that is configured to simultaneously adjust the orientation angle of the rice transplanter.

【Example】

Embodiments of the present invention will be specifically described below with reference to the drawings. In Figures 1 and 2, numeral 1 indicates passenger 4.
It is a wheel-type traveling body with two parallel links at the rear.
The rice transplanting device 5
is attached so that it can be raised and lowered, and constitutes a well-known rice transplanter. The rice transplanting device 5, similar to conventionally known devices, has a frame 6 serving as a transmission case as a base, a float 7 disposed below the frame 6, and a float 7 that is tilted toward the traveling vehicle body 1 and supported so as to reciprocate in the left and right direction. The seedling tank 8 has a seedling tank 8 and a planting body 9 which is provided so as to move up and down in opposition to the inclined lower end of the seedling tank 8. The system is configured to take out pine-shaped seedlings one by one from a seedling outlet and plant them on the rice field. As shown in FIG. 2, the float 7 has a center float 7a in the center and a pair of left and right side floats 7b, which are shorter in length than the center float, on both sides of the center float 7a. The system includes a planting depth adjusting device 10 that adjusts the vertical distance between the float 7 and the frame 6 to adjust the planting depth of seedlings planted on the rice field by the planting body 9, and a planting depth adjusting device 10 that senses the vertical movement of the center float 7a. A control device 1 that controls the hydraulic cylinder 3
1 is provided. As shown in detail in FIG. 3, the planting depth adjusting device 10 has a bell crank 13 fixed to a rotating shaft 12 which extends horizontally in the left-right direction above the float 7 and is pivotally supported by the frame 6. One end of the crank 13 is pivotally supported by a pin 15 to the upper end of a bracket 14 erected at the rear of the center float 7a.
The other end of the bell crank 13 and one end of a bell crank 17 which is pivotally supported via a pivot 16 to the front end of the frame 6 are rotatably connected by a rod 18. The operating lever 1 is connected to the device 11 and is connected to the rotating shaft 12.
The base end of rice transplanter 9 is fixed, and the tip end is attached to the rice transplanting device 15.
The vertical movement range of the float 7 is divided into a plurality of stages and is locked to a shift plate 20 that projects rearward. Further, an arm 12 is attached to the rotating shaft 12.
Approximately the center of the side float 7b is pivotally supported via a. As shown in FIGS. 3 and 4, the control device 11 provided at the front of the center float 7a is
The lower end of the pantograph 22 is pivoted to a bracket 21 provided on the center float 7a, and the upper end of the pantograph 22 is pivoted to the other end of the bell crank 17 via a pin 23.
The tip of the outer tube 24a of No. 4 is fixed, and the tip of the inner wire 24b is fixed to the bracket 21.
It is pivotally connected to the nearby center float 7a,
The base end of the operating wire 24 is connected to the hydraulic cylinder 3.
The valve lever 3a is connected to the valve lever 3a. In such a configuration, when the rice transplanter is introduced into a paddy field and rice transplanting work is performed, when the rice transplanter 5 is lowered by the lift mechanism 4, the bottom surface of the float 7 is supported by the rice transplanter 5 in contact with the rice field surface, and the traveling vehicle body 1 The rice-planting work is carried out at the same time as the rice-planting machine is driven. The center float 7a rotates around the pin 15 and moves up and down within the bending and stretching range of the pantograph 22 due to the up and down movement of the traveling vehicle body 1 or the ups and downs of the rice field. For example, when the center float 7a lowers, the pantograph 22 is extended, the inner wire 24b is pulled, the valve lever 3a is pulled, and the hydraulic cylinder 3 is contracted.
The rice transplanting device 5 descends via the parallel link 2 and the center float 7a rises, and along with this, the inner wire 24b is gradually returned. When the pantograph 22 returns to the normal position, the inner wire 24b stops moving and the float 7a returns to its proper position. Retained. Further, when the center float 7a rises and the pantograph 22 contracts, the inner wire 24b is returned and pushes the valve lever 3a, the hydraulic cylinder extends and the rice transplanting device 5 is lifted up via the parallel link 3, and the center float 7a is lowered to the proper position. In this way, the distance between the float 7, the frame 6, and the implant 9 is always maintained constant, and the rice planting operation is performed at an appropriate planting depth. To adjust the planting depth of seedlings depending on the size of the seedlings to be planted or the condition of the rice field, etc., hold the operating lever 19 and move it upwards or downwards so as to rotate the rotating shaft 12, and then move the shift plate 20. to be locked. Then, due to the rotation of the rotating shaft 12, the rear part of the center float 7a and the side floats 7b are moved upward or downward by the bell crank 13 and the arm 12a.
8. The front part of the center float 7a moves up and down via the bell crank 17 in substantially the same way as the rear part while keeping the height of the pantograph 22 and the length of the inner wire 24b constant. Therefore, the bottom surface of the float 7, especially the center float 7a, will move up and down almost horizontally with respect to the rice field even if it is adjusted up and down, and the control device 11 appropriately senses the up and down movement and controls the rice transplanting device 5. The planting work is performed by moving the plant up and down and maintaining the planting depth set by the planting depth adjusting device 10. Further, the orientation angle of the float 7 is substantially constant, so that mud pushing phenomenon and poor ground leveling do not occur. FIG. 5 shows another embodiment of the invention. In this embodiment, among the planting depth adjusting device 10,
The bell cranks 13, 17 and rod 18 in the previous embodiment are eliminated, and in their place an operating lever 19 is used.
A bracket 14 of the center float 7a is directly supported by a pin 25, a bracket 26 is fixed to the rotating shaft 12, and a wire 27 is connected to the bracket 26.
Control device 1 with one end attached and the other end described later
It is connected to 1. This control device 11 connects one end of a bell crank 29 pivotally supported to the frame 6 via a pin 28 and a bracket 21 provided on the center float 7a with a rod 30, and operates the other end of the bell crank 29. The tip of the inner wire 24b of the wire 24 is attached, and the tip of the outer tube 24a of the operating wire 24 is attached to one end of a bell crank 32 that is pivotally supported on the frame 6 via a pin 31. It is connected to the other end of the wire 27, and the rest is the same as in the previous embodiment, so the same reference numerals are given and the explanation will be omitted. Note that the code 33 is the wire 27
This is a return spring for returning the . In such a configuration, when the rice transplanter is performing rice transplanting work, the center float 7a is connected to the pin 2.
The tip side moves up and down centering on 5, and this up and down movement is detected by the control device 11, and the rod 30 and bell crank 2
Inner wire 24b of operation wire 24 via 9
is pulled or returned to move the rice transplanting device 5 up and down. In addition, when the operating lever 19 is moved up and down and locked to the shift plate 20 in order to adjust the planting depth of seedlings, the center float 7 is moved by the amount that the pin 25 is moved.
a and the side float 7b move up and down, and the depth of the seedlings planted by the planting body 9 changes. If the vertical movement distance of the center float at this pin 25 position is a or b, then the wire 27 is pulled or returned via the bracket 26 by the rotation of the rotating shaft 12, and the wire 27 is moved via the bell crank 32. The tip of the outer tube 24a of the operating wire 24 is moved by a' or b', and the front part of the center float 7a is moved up and down by a' or b' via the inner wire 24b and rod 30. The bottom surface of the center float 7a slides in almost uniform contact with the rice field surface, and the control device 11 can appropriately sense the vertical movement and maintain the set planting depth to perform proper rice planting work. . Further, the orientation angle of the float 7 is also approximately constant, so no problem occurs.

【Effect of the invention】

As explained above, since the control device of the rice transplanter according to the present invention is configured as described above, when the rear end of the float 7 is moved up and down by operating the lever 19 to change the planting depth of the seedlings, the depth of planting the seedlings can be changed. The position of the control device is synchronously and automatically changed and adjusted, and the float 7 comes to operate based on the previous heading angle. Therefore, the operator does not need to adjust the orientation of the float 7 or the control device 11 at all, resulting in extremely good operability. In the above embodiment, the present invention was applied to a riding-type rice transplanter, but the present invention can be applied to a walking-type rice transplanter in the same manner. The present invention is not limited to the embodiment, and other means may be used as long as the entire float is moved up and down by approximately the same amount.

[Brief explanation of the drawing]

Fig. 1 is a side view of a rice transplanter showing an embodiment of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a side view of the main parts,
FIG. 4 is a front view of the main part, and FIG. 5 is a side view of the main part showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Traveling vehicle body, 2... Parallel link, 3... Hydraulic cylinder, 4... Lift mechanism, 5... Rice transplanting device, 6... Frame, 7... Float, 7a...
Center float, 7b...Side float, 8
... Seedling tank, 9 ... Planting body, 10 ... Planting depth adjustment device, 11 ... Control device, 12 ... Rotating shaft, 13 ... Bell crank, 14 ... Bracket, 15, 16 ... Pin , 17...bracket,
18...rod, 19...operation lever, 20...
Shift plate, 21... Bracket, 22... Pantograph, 23... Pin, 24... Operation wire, 2
4a... Outer tube, 24b... Inner wire, 25... Pin, 26... Bracket, 27...
... wire, 28 ... pin, 29 ... bell crank, 30 ... rod, 31 ... pin, 32 ... bell crank, 33 ... return spring.

Claims (1)

[Claims] 1. A rice transplanting device 5 equipped with a plurality of floats 7 on the lower side is installed at the rear of the traveling vehicle body 1. 7 or a part of the float 7a has a rear end connected to the frame by a link, and can be moved up and down by operating a lever 19, and can also move around a pivot shaft 25 at the rear to the front side. The control device 11 is connected to a control device 11 that detects this and changes the amount of oil in the hydraulic cylinder 3, and this control device 11 moves with the movement of the rear end of the float 7a by operating a lever 19 to adjust the planting depth. A rising/lowering control device for a rice transplanter, characterized in that it is configured to be able to simultaneously change the height and adjust the orientation of the float 7a.