JPH08214643A - Swinging apparatus for transplantation machine - Google Patents

Abstract

PURPOSE: To enable the level control of a transplantation machine with a simple structure and enable the change between automatic control mode and manual control mode. CONSTITUTION: A transplantation machine 20 is provided with lifting mechanisms 31, 32 for vertically moving at least one of the right and left wheels 27, 29 and a driving part 30 for driving the lifting mechanisms 31, 32. A swing lever 37 is connected to the driving part 30 with a swing rod 38. A pendulum 49 freely rotatable in lateral direction around a supporting shaft according to the right or left inclination of the transplantation machine 20 is detachably connected to the swing rod 38 with a connection mechanism. The pendulum 49 is connected to the swing rod 38 with the connection mechanism in the case of automatic level control and the connection between the pendulum 49 and the swing rod 38 with the connection mechanism is released in the case of manually performing the level control.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing device of a transplanter for transplanting tobacco seedlings.

[0002]

2. Description of the Related Art Conventionally, a transplanter for transplanting tobacco seedlings is provided with a swing device for independently raising and lowering the left and right wheels, and the swing device raises and lowers the wheels to run along a contour line on a slope. It is known to control the transplanter in a horizontal state in some cases. For example,
In the transplanter disclosed in Japanese Patent Publication No. 3-17422,
The left / right tilted state of the transplanter is detected by a detector, and the hydraulic cylinder is expanded / contracted based on the detection result to raise / lower the wheels on the left side or the right side.

An outline of the swing device in this transplanter will be described with reference to FIGS. 6 to 8. Transplanter 1
An engine 3 and a mission case 4 are fixed to a frame 2 of the vehicle, a drive shaft 5 is provided at a lower end portion of the mission case 4, and a pair of left and right axle cases 6 and 7 are rotatably provided around the drive shaft 5. The upper end side of is connected. Axles 8 are attached to the lower ends of the axle cases 6 and 7, and rear wheels 9 and 10 are connected to these axles 8. A front wheel arm 11 extending forward is connected to each of the axle cases 6 and 7, and front wheels 12 and 13 are attached to front end portions of the front wheel arm 11.

In addition, the transplanter 1 includes a detector (not shown) for detecting the left-right inclination state of the transplanter 1, and a pair of left and right hydraulic cylinders 14 that expand and contract based on the detection result of the detector. 15 and link mechanisms 16 and 17 for rotating the axle cases 6 and 7 around the drive shaft 5 by expanding and contracting the hydraulic cylinders 14 and 15.

On the rear side of the transplanter 1, there is an engine 3
There are provided a rotary pot 18 which rotates in a horizontal plane by a driving force from the engine, and a transplant opening device 19 which moves up and down in a substantially elliptical locus by the driving force from the engine 3.

With the above arrangement, the hydraulic cylinders 14, 1
When 5 expands and contracts, the axle cases 6 and 7 rotate around the drive shaft 5 via the link mechanisms 16 and 17, and the left rear wheel 9 and the front wheel 12 or the right rear wheel 10 and the front wheel 13 simultaneously. Move up and down.

FIG. 7 shows a state where the transplanting work is performed on a flat ground, and the left and right hydraulic cylinders 14 and 15 are both in the most contracted state. The left and right rear wheels 9 and 10 and the front wheels 12 and 13 with respect to the frame 2 are at the same position, and the transplanter 1 is maintained in a horizontal state.

FIG. 8 shows a state in which transplanting work is performed while traveling along a contour line on a sloping ground. The right hydraulic cylinder 15 on the valley side is extended, and the right axle case 7 is placed around the drive shaft 5. It is rotated downward. Therefore, the transplanting machine 1 is maintained in a horizontal state, and seedlings can be transplanted vertically even in the case of transplanting work on a slope.

However, the swing device having a structure in which the wheels (rear wheels 9, 10 and front wheels 12, 13) are automatically moved up and down by electric control using the above-mentioned detector has a complicated structure and is high in cost. .

On the other hand, there is also known a manually operated swing device in which a worker operating a transplanter operates a control lever to raise and lower wheels. Such a manually-operated swing device has a simple structure and is inexpensive, but it imposes a heavy burden on the operator, and it is difficult to reliably control the transplanter horizontally. It is difficult to align them vertically.

Further, an automatic swing having a structure in which a pendulum which is rotatable in the left-right direction around the support shaft is provided, and the wheels are automatically moved up and down by the movement of the pendulum which is rotated in the left-right direction according to the inclination of the transplanter in the left-right direction. Devices are also known. According to the automatic swing device having such a structure, the horizontal control of the transplanter can be surely performed, the accuracy of vertically aligning the transplanted state of the seedlings is improved, and the structure is simple and inexpensive.

[0012]

However, in the field where the unevenness is continuous in addition to the left-right inclination, when the transplanter is automatically horizontally controlled by the automatic swing device using the pendulum, the response of the control operation to the rotation of the pendulum is increased. The delay may cause the transplanter to swing in a direction opposite to the direction in which the transplanter is returned to the horizontal state, which may cause a disadvantage that the transplanted state of the seedlings is significantly inclined.

Therefore, under such a work situation,
It is desirable to manually control the transplanter horizontally.

Further, in the automatic swing device utilizing the rotation of the pendulum, if a failure such as the pendulum not smoothly turning due to intrusion of dirt or dust occurs, horizontal control can be performed until the failure is repaired. There is the inconvenience of disappearing.

[0015]

According to the first aspect of the present invention,
A transplanter having an elevating mechanism for elevating and lowering at least one of the left and right wheels and a drive unit for driving the elevating mechanism, and connecting the drive unit and a swing lever for operating the drive unit via a swing rod. The pendulum is provided with a pendulum that is rotatable in the left-right direction around a support shaft in accordance with the left-right inclination of the transplanter, and the pendulum is configured to operate the drive unit via the swing rod by the rotational movement of the pendulum. The swing rod and the swing rod are detachably connected by a connecting mechanism.

According to a second aspect of the invention, in the first aspect of the invention, the balance weight is adjustably attached to the pendulum.

[0017]

According to the first aspect of the present invention, in the state where the pendulum and the swing rod are connected by the connecting mechanism, when the transplanter tilts in the left-right direction and the pendulum rotates in the left-right direction, the swinging motion causes the swing motion. The drive unit is operated via the rod, the elevating mechanism is driven by the operation of the drive unit, the wheels are moved up and down, and the horizontal control of the transplanter is automatically performed according to the inclination of the field. On the other hand, when the connection state between the pendulum and the swing rod by the connection mechanism is released, the drive unit does not operate even if the pendulum rotates, and the drive unit is operated via the swing rod by operating the swing lever, The elevator mechanism is driven by the operation of the drive unit to raise and lower the wheels, and the horizontal control of the transplanter can be performed manually.

According to the second aspect of the present invention, by adjusting the balance weight, it is possible to improve the performance of returning the pendulum to the neutral position when the transplanter is automatically swung by the pivotal movement of the pendulum. The accuracy of horizontal control using the pendulum is improved.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described based on FIGS. An engine 22 and a mission case 23 are fixed to a front portion of a frame 21 of the transplanter 20. At the lower end of the mission case 23 is the engine 2
The drive shaft 24 that rotates by the drive force from 2 is provided,
The upper end sides of a pair of left and right axle cases 25 are rotatably connected around the drive shaft 24. Axle shafts 26 are attached to the lower end side of the axle case 25, and a rear wheel 27 which is rotationally driven by the driving force from the engine 22 is connected to the axle shafts 26. In addition, the axle case 25
A front wheel arm 28 extending forward is connected to each of the front wheel arms 28, and a front wheel 29 is attached to the front end of the front wheel arm 28.
Is attached.

At the front of the transplanter 20, a hydraulic pump 30 as a drive unit, a pair of left and right hydraulic cylinders 31 as a part of a lifting mechanism supplied with oil from the hydraulic pump 30, and a hydraulic cylinder 31. And a pair of left and right link mechanisms 32, which are a part of an elevating mechanism for vertically rotating the axle case 25 around the drive shaft 24 by expansion and contraction. The left and right hydraulic cylinders 31 can be independently expanded and contracted. For example, when the left hydraulic cylinder 31 expands and contracts, the left axle case 25 connected via the left link mechanism 32 rotates, This rotation causes the left rear wheel 27 and the front wheel 29 to move up and down at the same time.

At the rear part of the transplanter 20, a rotary pot 33 that rotates in a horizontal plane by the driving force from the engine 22 and a transplant opening device that moves up and down in a substantially elliptical locus by the driving force from the engine 22. 34 and transplanter 20
And a handle 35 that is gripped for steering operation.

Next, a swing lever 37 for manually switching the hydraulic valve 36 of the hydraulic pump 30 is provided on the handle 35 so as to be rotatable in the left-right direction. The swing lever 37 is connected to a rear end portion of a swing rod 38 extending in the front-rear direction from the vicinity of the handle 35 to the vicinity of the hydraulic pump 30, and the swing lever 37 and the swing rod 38 are connected to each other.
The swing rod 38 is connected so as to be twisted counterclockwise or clockwise by a turning operation of the swing lever 37 in the left-right direction.

A plate 39 extending in a direction orthogonal to the swing rod 38 is fixed to the tip end side of the swing rod 38 located near the hydraulic pump 30, as shown in FIG. 39 has a long hole 40
Is formed, and the valve rod 41 connected to the hydraulic valve 36 is inserted into the elongated hole 40.

When the swing rod 38 is twisted by the rotating operation of the swing lever 37, the plate 39 is vertically rotated around the swing rod 38, and this rotation causes the valve rod 41 to move up and down. 41
At the same time, the hydraulic valve 36 is switched by moving up and down.

Here, in the vicinity of the hydraulic valve 36,
A guide plate 42 for guiding the lifting operation of the valve rod 41 is provided.
A guide surface 43 is formed so that the portion where the valve rod 41 is in the neutral position is the bottom portion. A pipe 44 is rotatably fitted on the tip of the swing rod 38, and the pipe 44 is used to switch the hydraulic valve 36.
A switching lever 45 for switching between a manual operation state performed by rotating 7 and a state automatically performed by rotating a pendulum described later is fixed. A spring 46 is attached between the switching lever 45 and the valve rod 41. The spring 46 biases the valve rod 41 against the guide surface 43 when the switching lever 45 is rotated to the manual operation position shown by the one-dot chain line in FIG. The biasing force disappears in the state of being rotated to the automatic control position shown by the solid line in (b).

Next, a mounting plate 47 is fixed to the rear portion of the frame 21, and the mounting plate 47 is fixed.
The pendulum 49 is rotatable around the support shaft 48 in the left and right directions.
Is attached. A supporting shaft 51 fixed to one end side of a link lever 50 which is a part of a connecting mechanism is inserted into the pendulum 49 with a longitudinal center axis, and the link lever 50 is rotatable around the supporting shaft 51. It is provided in. Further, a spring 52 is attached around the support shaft 51, and the spring 52 urges the link lever 50 in a direction to press the pendulum 49. On the other hand, one end of a swing rod stay 53, which is a part of a connecting mechanism, is fixed to the swing rod 38.
Protrusion 5 formed on the other end of swing rod stay 53
4 is engaged with a hole 55 formed on the other end side of the link lever 50, so that the pendulum 49 and the swing rod 3
The connection with 8 is made.

On the lower end side of the pendulum 49, a tightening screw 5
The balance weight 57 is tightened and fixed by 6,
The balance of the pendulum 49 is adjusted by adjusting the inclination angle of the balance weight 57.

A swing lock lever 58 is attached to the handle 35, and a lock pin 60 is connected to the other end of a wire 59 whose one end is connected to the swing lock lever 58. The lock pin 60 is slidably held in a cylindrical body 61 fixed to the upper end of the pendulum 49, and the mounting plate 47 has a pin hole 62 into which the lock pin 60 is detachably engaged. Has been formed.

With such a configuration, when the horizontal control of the transplanter 20 is automatically performed during the transplanting work,
As shown by the solid line in FIG. 2, the hole 5 of the link lever 50
5 is engaged with the protrusion 54 of the swing rod stay 53, the link lever 50 and the swing rod stay 5
3 is connected, and the switching lever 45 is rotated to the position shown by the solid line in FIG. 5B, and the transplanter 20 is run.

When the transplanter 20 is tilted to the lower left as shown in FIG. 3 due to the inclination of the field during the transplanting operation in such a state, the pendulum 49 is moved to the transplanter 2.
It rotates to the left around the support shaft 48 with respect to 0 and maintains the vertical state. The swing motion of the pendulum 49 causes the swing rod 38 connected via the link lever 50 and the swing rod stay 53 to be twisted counterclockwise, so that the plate 39 is rotated counterclockwise around the swing rod 38. The valve rod 41 and the hydraulic valve 36 slide upward due to the rotation of the plate 39, and the hydraulic valve 36 is switched. By switching the hydraulic valve 36, oil is supplied to the hydraulic cylinder 31 on the left side, and the link mechanism 32 is driven to move the left rear wheel 27 and the front wheel 29 downward at the same time. It returns to the horizontal state as shown in 2.

When the transplanter 20 returns to the horizontal state, the pendulum 49 rotates clockwise with respect to the transplanter 20, the swing rod 38 is twisted clockwise with this rotation, and the plate 39 swings. Rotate clockwise around. Then, by rotating the plate 39, the valve rod 4
1 and the hydraulic valve 36 slide downward, the hydraulic valve 36 returns to the neutral position, and the oil supply to the right hydraulic cylinder 31 is stopped, and the transplanter 20 sets the rear wheel 27 on the left side and the front wheel 29 on the left side. Is moved downward and maintained in a horizontal state.

On the other hand, when the transplanter 20 is tilted downward to the right, the pendulum 49 rotates to the right around the support shaft 48,
This rotation causes the swing rod 38 to be twisted clockwise,
The hydraulic valve 36 is switched by sliding the valve rod 41 and the hydraulic valve 36 downward. By this switching, oil is supplied to the right hydraulic cylinder 31, and the right rear wheel 27 and the front wheel 29 move downward at the same time, whereby the transplanter 20 returns to the horizontal state.

Either the left or right hydraulic cylinder 3
When the oil is supplied to the first hydraulic cylinder 31, when the oil is already supplied to the other hydraulic cylinder 31, the oil is supplied to the one hydraulic cylinder 31 and at the same time, the oil is returned from the other hydraulic cylinder 31. Be done.

By automatically performing the horizontal control of the transplanter 20 in this manner, the horizontal control of the transplanter 20 can be surely performed, and the operator who operates the transplanter 20 can operate the rotary pot 33. It is possible to concentrate on putting seedlings into each pot and properly operating the transplanter 20 along the ridges, thereby improving the work accuracy of the transplanting work.

Further, when the transplanter 20 is automatically horizontally controlled, the swing lock lever 58 is used when the transplanter is interrupted to move in the field or when the transplanter 20 is loaded on the carrier. Operate the lock pin 6
0 is engaged with the pin hole 62. This allows the transplanter 20
The tilting of the pendulum 49 prevents the pendulum 49 from rotating, so that the hydraulic cylinder 31 does not expand or contract due to the rotation of the pendulum 49. Therefore, the hydraulic cylinder 31 does not expand and contract during the movement or the loading on the transportation vehicle, and the transplanter 20 does not sway left and right, and the movement and the loading can be performed safely.

Further, when the horizontal control of the transplanter 20 is automatically performed, if the pendulum 49 is imbalanced,
Although the transplanter 20 is in the horizontal state, the pendulum is displaced from the neutral position, and the transplanter 20 cannot maintain the horizontal state. In such a case, the balance weight 57 is pivotally adjusted so that the pendulum 49 is correctly returned to the neutral position when the transplanter 20 is in the horizontal state. By performing such adjustment, the accuracy of horizontal control of the transplanter 20 is further improved.

Next, a case where the horizontal control of the transplanter 20 is manually performed will be described. When it is desirable to perform the horizontal control manually, the pendulum 49 can be smoothed when the field condition is not only inclined to the left and right but also uneven, or when dirt and dust enter the periphery of the support shaft 48. This is the case when there is a failure such as no rotation.

When the horizontal control of the transplanter 20 is performed manually, the connection between the link lever 50 and the swing rod stay 53 is released as shown by the one-dot chain line in FIG. 5 (b) is rotated to the position shown by the alternate long and short dash line. To release the connection between the link lever 50 and the swing rod stay 53, the link lever 50 is slid toward the front side against the urging force of the spring 52 to disengage the hole 55 from the protrusion 54. Then, the link lever 50 is rotated downward around the support shaft 51. The rotation operation of the switching lever 45 is performed by an operator holding the switching lever 45 and urging the switching lever 45 downward.

Here, by releasing the connection state between the link lever 50 and the swing rod stay 53, the swing rod 38 will not be twisted even if the pendulum 49 rotates. On the other hand, when the swing lever 37 is rotated, the swing rod 38 is twisted, and the swing rod 38 is twisted, so that the hydraulic valve 36 slides upward or downward as in the case of the automatic control described above. And
By switching the hydraulic valve 36, oil is supplied to the left or right hydraulic cylinder 31, and the left rear wheel 27 and the front wheel 29 or the right rear wheel 27 and the front wheel 29 move up and down at the same time. Horizontal control is performed by manual operation of the transplanter 20. Specifically, when the transplanter 20 is tilted downward to the left, the left rear wheel 27 and the front wheel 29 are moved downward by rotating the swing lever 37 to the right to move the transplanter 20 to the lower side. Returns to the horizontal state.

When performing horizontal control by manual operation, the switching lever 45 is rotated to the manual operation position so that the valve rod 41 is pressed against the guide surface 43 by the urging force of the spring 46. There is. Therefore, the valve rod 41 and the hydraulic valve 36 always have a force for returning them to the neutral position, which is a position corresponding to the bottom of the guide surface 43, and the swing lever 37.
The operability when returning the to the neutral position is improved.

In this embodiment, the case where the pair of hydraulic cylinders 31 and the link mechanism 32 are provided on the left and right has been described as an example, but the hydraulic cylinder 31 and the link mechanism 32 are provided on only one of the left and right sides. It may be a structure.

[0042]

According to the invention described in claim 1, when the pendulum and the swing rod are connected by the connecting mechanism,
The transplanter can be automatically horizontally controlled by utilizing the swinging motion of the pendulum caused by the tilting of the transplanter in the left-right direction, and when the connection between the pendulum and the swing rod is released by the connecting mechanism. By operating the swing lever, the transplanter can be horizontally controlled manually. Therefore, the accuracy of transplanting seedlings in a vertical state can be improved by automatically performing horizontal control during normal transplanting work. On the other hand, in the case of a failure such as transplanting work in the field where the unevenness is continuous in addition to the left-right inclination and when the pendulum does not rotate smoothly, etc., the horizontal control of the transplanter can be performed manually. To prevent the situation where the accuracy of transplanting the seedlings in the vertical state deteriorates or prevent the situation where the transplant work becomes impossible until the failure is fixed. It can be.

According to the second aspect of the present invention, by providing the balance weight, the returning performance to the neutral position of the pendulum can be improved, and the accuracy of the horizontal control which is automatically performed by utilizing the turning operation of the pendulum. Can be improved.

[Brief description of drawings]

FIG. 1 is a side view of an entire transplanter showing an embodiment of the present invention.

FIG. 2 is a rear view showing a case where the transplanter is in a horizontal state.

FIG. 3 is a rear view showing a state where the transplanting machine is tilted to the lower left.

FIG. 4 is a side view showing an arrangement state of a swing device.

5A and 5B show a connected state of a swing rod and a hydraulic valve, FIG. 5A is a side view and FIG. 5B is a front view.

FIG. 6 is a side view showing a conventional example.

FIG. 7 is a rear view showing a state where the transplanter is traveling on a flat ground.

FIG. 8 is a rear view showing a state in which the transplanter performs horizontal control on a sloping ground.

[Explanation of symbols]

 20 Transplanter 27,29 Wheel 30 Drive part 31,32 Lifting mechanism 37 Swing lever 38 Swing rod 48 Spindle 49 Pendulum 50,53 Coupling mechanism 57 Balance weight

Claims (2)

[Claims] 1. A lift mechanism for lifting and lowering at least one of the left and right wheels and a drive unit for driving the lift mechanism, and the drive unit and a swing lever for operating the drive unit via a swing rod. In the transplanter that is connected with the transplanter, a pendulum that is rotatable in the left-right direction around a support shaft is provided according to the inclination of the transplanter in the left-right direction, and the drive unit is operated via the swing rod by the rotational movement of the pendulum. The swing device of the transplanter, wherein the pendulum and the swing rod are connected to each other by a connecting mechanism so as to be detachable. 2. The swing device of the transplanter according to claim 1, wherein a balance weight is adjustably attached to the pendulum.