JP2586853B2 - Walking type seedling transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking-type seedling-planting machine in which a traveling vehicle body is controlled horizontally by changing the relative vertical height of left and right wheels.

[0002]

2. Description of the Related Art As a prior art of this kind, there is a tilt control device for a large-sized agricultural tractor as disclosed in Japanese Utility Model Laid-Open No. 55-128910, but the device is small in size. When applied to a walking-type seedling transplanter, the walking-type seedling transplanter cannot perform stable tilting control due to remarkable small vibrations and swings of the body, and furthermore, since the control unit is electrically configured, the battery is not used. And the like must be mounted on the fuselage, the weight of the fuselage becomes heavy, and the work operability is remarkably deteriorated, so that it cannot be put to practical use.

[0003]

According to the present invention, in order to solve the conventional problems, left and right wheels 11 are provided on the left and right sides of a traveling vehicle body 2 so as to be movable up and down in cooperation with a link mechanism A. The right and left wheels 11, 11 are configured to change the relative vertical height by operating the link mechanism A by the hydraulic cylinder device 20 to change the left-right inclination of the traveling vehicle body 2, and to be provided at the front of the traveling vehicle body 2. The traveling vehicle body 2 is controlled horizontally by operating an oil passage switching valve 10 for switching an oil passage to the hydraulic cylinder device 20 by the left and right tilting of a balance weight 3 for keeping the front and rear balance of the traveling vehicle body 2 provided. It is a walking-type seedling planter.

[0004]

According to the present invention, the right and left wheels 11 and 11 are provided on the left and right sides of the traveling vehicle body 2 so as to be vertically movable in cooperation with a link mechanism A, and the relative vertical height of the left and right wheels 11 and 11 is provided. Is changed by the operation of the link mechanism A by the hydraulic cylinder device 20 to change the left-right inclination of the traveling vehicle body 2 and the traveling vehicle body 2 provided at the front of the traveling vehicle body 2
Since the left and right tilt of the balance weight 3 for taking the front-rear balance actuates the oil passage switching valve 10 for switching the oil passage to the hydraulic cylinder device 20 to control the traveling vehicle body 2 horizontally, the walking type seedling transplanter is used. The force of the left and right tilt of the heavy balance weight 3, which is provided at the front of the vehicle body 2 and balances the front and rear of the traveling vehicle body 2, can be used for the operation of switching the oil passage switching valve 10, as in the conventional example. Although it is a small-sized, light-weight and simple-type walking type seedling machine that does not need to be electrically controlled, the horizontal control of the traveling vehicle body 2 can be performed while the maneuvering operability of the seedling-planting operation is good. Since the balance weight 3 is not so affected by small vibrations of the vehicle body, it is possible to prevent excessive level control and malfunction, and to perform very good seedling planting work.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A walking type seedling transplanter according to an embodiment of the present invention will be described in detail with reference to the drawings. A balance weight 3 made of steel is fixedly provided on a front side of a mounting shaft 6 rotatably supported along a front-rear direction of the vehicle body 2 on a support 5 provided on a front side of a frame 4 of the traveling vehicle body 2. Have been. A short link 7 is provided at the rear end of the mounting shaft 6, and a link 9 having a long hole at a lower end thereof, into which a pin provided at the upper end of the link 7 is fitted and engaged, is provided on a shaft 8 provided at an upper portion of the support 5. I let you support it. Then, the upper end of the link 9 is connected to the oil passage switching valve 10.
When the balance weight 3 tilts to the left and right and the link 7 rotates relative to the traveling vehicle body 2 about the mounting shaft 6 (a), the switching arm of the oil passage switching valve 10 is connected. Is operated to switch the hydraulic circuit.

[0006] The traveling vehicle body 2 is supported by left and right wheels 11 on the cultivator in a paddy field and a float 12 on the rice field. And the frame 4
A prime mover 13 is mounted on the front upper side, and a transmission 14 having a fuel tank on the upper side is provided on the rear side thereof.
Is equipped with a transmission mechanism for transmitting the wheels 11 and the seedling plant 1.

The left and right wheels 11, 11 are rotatably supported around shafts 15, 15 projecting left and right from the transmission 14, and are projecting rearward and are provided with transmission arms 16 having a transmission mechanism therein. Are respectively supported on axles 17 and 17 provided at the rear end. The left and right interlocking arms 16
Axes 19 and 19 are provided at the distal ends of the arms 18 and 18 fixed to the inside of the arm and protruding upward.
One end of a hydraulic cylinder device 20 protruding rearward and extending and contracting is provided on one of the ends 9 and 19, and the other end of a connecting rod 21 provided in parallel with the hydraulic cylinder device 20 is provided on the other side. The other end of the hydraulic cylinder device 20 and the connecting rod 21 is connected to the left and right ends of an arm 23 rotatably provided on a vertical axis provided on a mounting portion 22 protruding from the upper surface of the transmission 14, When the wheel 11 on the mounting side of the hydraulic cylinder device 20 moves up and down with respect to the frame 4 due to expansion and contraction of the device 20, the wheel 1 on the mounting side of the connecting rod 21
1 is interlocked so as to move up and down in the opposite direction.

The connecting rod 21 and the hydraulic cylinder device 20 connected to the distal ends of the arms 18 fixed to the left and right interlocking arms 16, and the arm connected to the connecting rod 21 and the hydraulic cylinder device 20. 23 constitutes a link mechanism A that changes the relative vertical height of the left and right wheels 11. The hydraulic cylinder device 20 may be provided on either the left or right side.

Next, the hydraulic cylinder device 20 is switched by switching the oil passage switching valve 10 by tilting the balance weight 3 from side to side.
The hydraulic circuit configuration that operates will be described with reference to FIG. Reference numeral 24 denotes an oil tank, and reference numeral 25 denotes an oil pump rotated by the motor 13. These, including the oil passage switching valve 10 and the hydraulic cylinder device 20, are connected by piping to form a circuit. The figure shows the neutral position of the oil passage switching valve 10, and the hydraulic cylinder device 20 is fixed at a fixed length. When the switching arm of the oil passage switching valve 10 is pressed to switch to the circuit on the left side of the oil passage switching valve 10, the hydraulic cylinder device 20 contracts, and when the switching arm is switched to the circuit on the right side, the hydraulic cylinder device 20 extends. It is configured as follows.

The seedling plant 1 is provided with a planting rod 27 for planting seedlings on a transmission 26 supported on the float 12 and provided on the upper side thereof, and a seedling tank 28 on the upper side of the transmission 26. Seedling tank 28 loaded with seedlings and reciprocated left and right
Transmission 1 of the traveling vehicle body 2 so that the seedlings of
4 to the transmission 26 of the seedling plant 1. Further, a bar handle 29 for steering the traveling vehicle body 2 is provided at a rear portion of the traveling vehicle body 2.

When the above-mentioned walking-type seedling planter is operated to perform seedling planting while traveling, the traveling vehicle body 2 is moved by the seedling plant 1 with the balance weight 3 balanced in the front-rear direction. Planting work is performed. Then, when the cultivator of the field travels to a portion inclined left and right, the balance weight 3 tilts left and right relatively to the traveling vehicle body 2 due to the lateral inclination of the traveling vehicle body 2 and the oil path switching valve 10, the hydraulic cylinder device 20 is operated to drive the vehicle body 2
Is controlled to be horizontal, so that a normal seedling planting operation can be performed.

In particular, left and right wheels 11 are provided on the left and right sides of the traveling vehicle body 2 in such a manner as to be movable up and down in cooperation with a link mechanism A, and the relative vertical height of the left and right wheels 11 is determined by a hydraulic cylinder. A balance weight 3 is provided at the front of the traveling vehicle body 2 for changing the left-right inclination of the traveling vehicle body 2 by operating the link mechanism A by the device 20 to change the left-right inclination. Since the traveling vehicle body 2 is controlled horizontally by operating the oil passage switching valve 10 for switching the oil passage to the hydraulic cylinder device 20 by the left-right tilting, the front-rear balance of the traveling vehicle body 2 provided at the front part of the traveling vehicle body 2 is adjusted. The force of tilting the heavy balance weight 3 to the left and right can be used for the operation of switching the oil passage switching valve 10, and there is no need to electrically control the oil as in the conventional example. Although it is a natural walking type seedling transplanter, the horizontal control of the traveling vehicle body 2 can be performed while the maneuverability of the seedling planting operation is good, and the heavy balance weight 3 is hardly affected by the small vibration of the vehicle body. Extremely good seedling planting work can be performed by preventing excessive level control and malfunction.

[Brief description of the drawings]

FIG. 1 is a side view of a main part.

FIG. 2 is a front view of a main part.

FIG. 3 is a hydraulic circuit diagram

FIG. 4 is a plan view of a main part.

FIG. 5 is an overall side view of the walking type seedling transplanter.

[Explanation of symbols]

 2 Running vehicle body 3 Balance weight 10 Oil passage switching valve 11 Left and right wheels 20 Hydraulic cylinder device A Link mechanism

Claims (1)

(57) [Claims] A left and right wheel, which is provided to be able to move up and down in cooperation with a link mechanism, is provided on the left and right sides of a traveling body, and a relative vertical height of the left and right wheels is determined by a hydraulic cylinder device. To change the left-right inclination of the traveling vehicle body 2 by changing the operation of the link mechanism A according to
An oil passage switching valve 10 for switching an oil passage to the hydraulic cylinder device 20 by right and left tilting of a balance weight 3 provided at a front portion of the traveling vehicle body 2 for balancing the front and rear of the traveling vehicle body 2
The walking-type seedling transplanter is characterized in that the vehicle body 2 is controlled horizontally by operating the same.