JPH0811008B2 - Seedling planting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a seedling planting machine provided with a control mechanism for vertically moving left and right traveling wheels to control the attitude of a machine body.

[Conventional technology]

As a conventional technique of this type, the left and right traveling wheels are moved up and down together by the vertical displacement of the central float provided between the left and right wheels, and the relative up and down positions of the left and right traveling wheels are moved by the up and down movement of the separately provided left and right rolling detection floats. There was a seedling planter equipped with a changing control mechanism.

[Problems of conventional technology]

However, in the above-mentioned conventional technique, the control for moving the left and right traveling wheels up and down together and the control for changing the relative up and down positions of the left and right traveling wheels are performed by different floats, that is, both controls are performed. Since different floats are moved up and down, complicated controls are entangled, and proper control cannot be performed frequently.

[Means for solving the problem]

In order to solve the above problems, the present invention provides a seedling planting machine in which left and right traveling wheels 2 and 3 are provided on both left and right sides of a traveling vehicle body 1 so as to be vertically movable, and a float 4 is attached to a lower portion of the traveling vehicle body 1. In the above, the lower part is connected to the lifting / lowering control connecting members 31, 32, and 34 that are connected to the central part of the front part of the float 4, and fixed to the body by the lifting rod 35 that moves up and down by the vertical displacement of the central part of the front part of the float 4. The lifting control valve is switched to operate the lifting control hydraulic cylinder 17 to move the left and right traveling wheels 2 and 3 up and down together, and to the rolling control connecting member 38 that is connected to one side deviated from the left and right center of the float 4. The rolling valve 39 fixed to the machine body is switched by the rolling rod 39 which is connected to the lower part and detects the lateral displacement of the float 4, and the hydraulic cylinder 19 for rolling control is operated to move the left and right traveling wheels 2 and 3 relative to each other. The seedling planting machine is provided with a control mechanism for changing the lower position.

[Action effect]

According to the present invention, the lower part of the float 4 is connected to the lifting control connecting members 31, 32, and 34 that are connected to the center of the front part of the float 4.
A lifting rod 35 that moves up and down due to vertical displacement of the center of the front part switches the lifting valve fixed to the machine to operate the hydraulic cylinder 17 for lifting control and vertically move both left and right traveling wheels 2 and 3 to float. A rolling rod 39 for detecting a lateral tilt displacement of the float 4, the lower part of which is connected to a rolling control connecting member 38 which is connected to one side deviated from the left-right center of the float 4.
Since the rolling valve fixed to the machine body is switched by operating the hydraulic cylinder 19 for rolling control to change the relative vertical position of the left and right traveling wheels 2 and 3, the seedling planting machine is provided. Both control of up-and-down control and rolling control are performed by the float 4, the proper attitude control of the machine body can be performed, and the problems of the conventional technology can be solved well.

Further, in order to perform the lifting control and the rolling control, the lifting control connecting member 31 linked to the central portion of the front part of the float 4
The lower part is connected to 32/34 and the lifting valve is switched by the lifting rod 35 that moves up and down according to the vertical displacement of the center part of the front part of the float 4, and for the rolling control linked to one side deviated from the left and right center of the float 4. A lower rod is connected to the connecting member 38, and one float 4 and each valve are lifted and lowered so that the rolling valve 39 fixed to the body is switched by the rolling rod 39 that detects the lateral displacement of the float 4.
Since the 35 and the rolling rod 39 are connected to each other through another route, the structure is simple, and the posture of the front part of the float 4 can be accurately linked to each valve, and the posture of the airframe can be appropriately controlled.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

In the illustrated example, a prime mover 5 is mounted on the front side of the traveling vehicle body 1 in the forward direction, and the rear side of the prime mover 5 is used to transmit power to the left and right traveling wheels 2 and 3 and the seedling planting device 6. The transmission case 7 is provided, the interlocking shaft interlocking with the seedling planting device 6 is provided in the rear side of the transmission case 7, and the connecting body 8 is extended rearward. The side is provided with a planting case 10 for supporting the left and right planting rods 9 by incorporating a planting mechanism. Further, a pair of left and right handles 11 whose rear portions are curved and projected upward are provided on the rear side of the planting case 10, and the front side of the handle 11 is provided with seedlings that are tilted forward substantially along the handle 11. A seedling tank 12 for accommodating is provided.

On the left and right sides of the lower part of the transmission case 7, there are provided cylindrical rotating parts 13 each having a transmission shaft, and a chain case 14 having a chain interlocking mechanism is vertically rotatable toward the rear. The rear axle of this chain case 14
And the left and right traveling wheels 2 and 3 are pivotally supported. Also,
Rotating arms 16 are provided so as to project upward from the chain case 14 side of the rotating portion 13.

Then, a hydraulic cylinder 17 for raising and lowering control for controlling the attitude of the vehicle by vertically moving both the left and right traveling wheels 2 and 3 is provided so as to project from the upper part of the transmission case 7 toward the rear side, and the tip of the piston 18 of the hydraulic cylinder 17 is provided. The boss portion 20 of the dual hydraulic cylinders 19 for rolling control is pivotally supported on the portion, and the tribute rod 21 is loosely fitted to the outer periphery of the boss portion 20 in the horizontal direction so as to be able to rotate a seesaw in the front-back direction in plan view. The left and right end portions of the tributary rod 21 and the left and right rotating arms 16 and 16 are connected by rods 22 and 22, respectively, and the end surface of the hydraulic cylinder 17 and the double cylinders 19 and 19 are supported.
A buffer spring (23) is elastically biased between the end surface of the boss (20) and the end surface. The left and right pistons 24, 24 of the hydraulic cylinders 19, 19 are pin-connected to the fittings at the tips of the pistons 24, 24 and the corresponding positions of the rods 21, and when the hydraulic cylinders 19, 19 stop hydraulic operation, the left and right pistons Adjustment spring for returning 24 to the equilibrium position
25 ・ 25 is provided by elastically urging. Also, the double cylinder 19
・ Provide pressure release pins 26 ・ 26 at the rear of 19 respectively.
26. The pressure relief pin for contacting the rear part of 26 and releasing hydraulic pressure
A pressure releasing rod 27 for simultaneously operating the right and left 26 and 26 is provided so as to be rotatable forward and backward, the pressure releasing rod 27 is connected to one end of a wire 28, and the other end of the wire 28 is provided above the handle 11. It is connected to the operating lever 29.

The base of the handle 11 is provided with a fulcrum metal fitting 30 which is vertically and horizontally rotatable, and the rear part of the fulcrum metal fitting 30 is supported to rotate the float 4 vertically and horizontally along the longitudinal length of the traveling vehicle body 1. It is movably provided, and a left and right fulcrum metal 31 is provided at the left and right center position on the front end side of the upper surface of the float 4, and a lifting arm 32 having a U-shape in plan view is supported by the fulcrum metal 31 and provided on the left and right front end sides thereof. The elongated hole portion is slidably pin-coupled to the inner surface of the frame 33 on which the prime mover 5 is mounted. L from the left corner of the lifting arm 32 to the left
The L-shaped arm 34 is extended, and the elevating rod 35 is connected to the L-shaped arm 34 near the middle of the front-rear position.
The other end of 35 is connected to the operating arm 36 of the lifting valve provided on the front side of the upper portion of the transmission case 7. The L-shaped arm part 34, the elevating arm 32, and the fulcrum metal 31 to which the lower part of the elevating rod 35 is connected form a connecting member for elevating control.

Further, a center portion of a small L-shaped rolling arm 37 is rotatably pin-coupled to a position slightly rearward of the connecting point of the rod 35 of the L-shaped arm 34, and a rear side from the center portion of the arm 37 is connected. One end and a rolling control connecting member 38 fixed to the upper surface of the float 4 are connected by a rolling rod 39, and one end of the arm 37 from the center to an upper side and a rolling valve provided on the upper rear side of the transmission case 7 are connected. The working arm 40 is connected by a wire 41.

Reference numeral 42 is a fuel tank, and 43 is a side clutch lever for changing the course of the traveling vehicle body 1.

The left and right traveling wheels 2 and 3 are driven by the activation of the prime mover 5 to move the traveling vehicle body 1 forward, and the seedling tank 12 is laterally moved and the planting rod 9 is interlocked to perform planting. 2 and 3 maintain the horizontal posture of the traveling vehicle body 1 by the elevation control or the rolling control to maintain the stability of seedling planting on the soil surface.

In such an action, for example, when the float 4 moves up substantially horizontally due to the pressure of the soil surface, the lifting arm
Since the long hole of 32 also slides up and the L-shaped arm 34 which is a part of the arm 32 also moves up, the lifting rod 35 connected to the L-shaped arm 34 is moved up. The hydraulic cylinder 17 is moved to operate the hydraulic cylinder 17 to move the tribute rod 21 supported by the piston 18 rearward in parallel, and the rods 22 and 22 rotate the rotating arms 16 and 16, the rotating portions 13 and 13, the chain case.
The left and right traveling wheels 2 and 3 are lowered in parallel via 14 and 14 to raise the traveling vehicle body 1. The traveling vehicle body 1 is lowered by the opposite action.

The lifting control is performed as described above. On the other hand, when the left and right ends of the float 4 turn left and right under the pressure of the soil surface, for example, when the left end side moves upward, the float 4 upper surface is used for rolling control. The rolling arm 37 moves upward via the rolling rod 39 connected to the connecting member 38, and the rolling valve moves via the wire 41 connected to the rolling arm 37 to the right cylinder of the double hydraulic cylinder.
Actuating 19 to move the right side of the tributary rod 21 connected to the piston 24 to the front, and the right side rotating rod 22 by the right side rod 22.
The right vehicle wheel 3 is lifted through the 16, rotation unit 13 and chain case 14 to return the traveling vehicle body 1 to the horizontal posture. Further, when the right end side of the float 4 is rotated upward, the traveling vehicle body 1 is returned to the horizontal posture by the action opposite to the above.

In this way, the left and right wheels 2 and
The seedlings are planted while the horizontal position of the traveling vehicle body 1 is stably maintained in a horizontal posture by changing the vertical position of the left and right wheels 2 and 3 by rolling control.
Is moved up and down to a state in which it can be sufficiently grounded with respect to the cultivator, the driving reaction force of the wheels 2 and 3 acts on the steering wheel 11, so that the steering wheel 11 is lifted when the traveling vehicle body 1 is turned around the ridge. Since the load increases and a great amount of labor is required at the time of turning, the pressure-release pin 26 is hydraulically pressed through the wire 28 and the pressure-release rod 27 by operating the operation lever 29 provided on the handle 11 only when turning. Since the rolling control is stopped and brought into an uncontrollable state by operating the handle 11 in a direction in which the handle 11 is released, the drive reaction force acting on the handle 11 is released, and the handle 11 can be lifted and easily rotated.

And, in particular, when one float 4 which slides on the soil surface with planting vertically rotates vertically with respect to the traveling vehicle body 1 with the front end side in a horizontal state, the raising / lowering control is performed, and at the front end side of the float 4, the float 4 Rolling control is performed when the left and right ends turn left and right around the center line in the front-rear direction, so that both controls are performed by one float 4, and proper attitude control of the machine body can be performed.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a plan view,
2 is a side view, and FIG. 3 is a perspective view of a main part. In the figure,
Reference numeral 1 is a traveling vehicle body, 2 and 3 are left and right traveling wheels, 4 is a float, 17 is a hydraulic cylinder for lifting control, 19 is a hydraulic cylinder for rolling control, 31, 32 and 34 are connecting members for lifting control, and 35 is Lifting rod, 38 is a connecting member for rolling control,
39 indicates a rolling rod.

Claims (1)

[Claims] 1. Left and right traveling wheels 2 on both left and right sides of a traveling vehicle body 1.
3 is provided so that it can move up and down, and a float 4 at the bottom of the traveling vehicle body 1 is attached to the float 4.
Connecting members 31, 32, 34 for lifting control that are connected to the central part of the front part
The lifting valve 35 fixed to the machine is switched by the lifting rod 35 that moves up and down by connecting the lower part to the float 4 by the vertical displacement of the front center part and operates the hydraulic cylinder 17 for lifting control to operate the left and right traveling wheels 2. 3 is moved up and down together, and the lower part is connected to a rolling control connecting member 38 that is connected to one side deviated from the left and right center of the float 4 and is fixed to the machine body by a rolling rod 39 that detects a lateral tilt displacement of the float 4. The seedling planting machine is provided with a control mechanism for switching the valves to operate the hydraulic cylinder 19 for rolling control to change the relative vertical positions of the left and right traveling wheels 2 and 3.