JPH0922A - Seedling planter - Google Patents

Abstract

PURPOSE: To provide a seedling planter having a simple structure, improved balancing of weight in right and left direction, contriving approach of right wheel to the left wheel and excellent in operability. CONSTITUTION: This seedling planter has a pair of vertically movable wheels on both sides of a machine body and an elevating cylinder 18 rising and lowering respective wheels in the same direction and a horizontal cylinder 26 rising and lowering the wheels in reverse directions with each other, and these elevating cylinder 18 and horizontal cylinder 26 are provided in a longitudinal direction at the central part of the machine body. Preferably, the elevating cylinder 18 is fixed at the central rear part of a main gear box 1 in longitudinally long attitude and a piston rod 19 is projected backward from the elevating cylinder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention is used for a walk-behind planting machine.

[0002]

2. Description of the Related Art A seedling planting machine of this type is disclosed in JP-A-4-3358.
As shown in Japanese Patent Publication No. 08-08, a pair of wheels are arranged on both sides of the machine body, and each body wheel is moved up and down in the same direction by a piston rod protruding and retracting from a lifting cylinder to move the machine body up and down. At the same time, the piston rod protruding and retracting from the horizontal cylinder moves the wheels up and down in opposite directions, or moves the wheel on one side up and down to restore the horizontal inclination of the machine body to the horizontal direction. . The elevating cylinder is arranged in the center of the machine body in the front-rear direction, while the horizontal cylinder is arranged beside it in the front-rear direction or obliquely rearward from the center.

[0003]

In the former case, since the horizontal cylinder is provided on the side of the machine body, the center of gravity is laterally displaced, and the width is wide so that it is difficult to bring the left and right wheels closer to each other. It was Even in the latter case, the center of gravity is deviated, and the planting machine could not be configured in a well-balanced manner.

[0004]

In order to solve the above-mentioned problems, the present invention has a pair of wheels 16, 16 on both sides of the machine body 8.
Are provided so that they can move up and down, and each wheel 1
The raising and lowering cylinders 18 for raising and lowering 6, 16 in the same direction and the horizontal cylinders 26 for raising and lowering in the opposite directions are provided, and these raising and lowering cylinders 18 and the horizontal cylinders 26 are provided in the central portion of the machine body 8 in the front-back direction. It was a planting machine.

[0005]

In the seedling planting machine constructed as described above, the pair of left and right wheels 16 and 16 are rotated by the power of the engine to move forward.
When the machine body 8 is moved up and down while the vehicle is moving forward (or stopped), oil is sent to the lifting cylinder 18. Then, the piston rod 19 appears and disappears, the pair of wheels 16, 16 moves up and down in the same direction with respect to the machine body 8, and the machine body 8 moves up and down. Further, when there is a difference in height between the ground on which the left and right wheels 16, 16 are rotating or the tiller, the machine body 8 inclines laterally. In such a case, oil is supplied to the horizontal cylinder 26 to lower the wheels on the lower side. 16 is a piston rod 28 in the direction of descending from the body 8.
Infest. Then, the lateral inclination of the machine body 8 returns to the horizontal direction.

[0006]

According to the present invention, the lifting cylinder 18 and the horizontal cylinder 26 for moving the pair of wheels 16 and 16 up and down as described above are provided in the central portion of the machine body 8 in the front-rear direction. Therefore, the weight balance of the machine body 8 in the left-right direction is good, and since the cylinders 18 and 26 do not occupy space in the lateral direction of the machine body 8, the left and right wheels 16, 16 can be brought closer to each other.

[0007]

Next, an embodiment of the present invention will be described. The engine 2 and the main frame 3 are fixed before and after the main gear box 1,
The left frame 5 and the right frame 6 extend rearward from the left and right of the input case 4 fixed after the main frame 3, and the left frame 5
A planting case 7 is fixed to the rear end of the rear body to form an airframe 8. The planting frame 9 extends obliquely upward from the left of the planting case 7, and a pair of left and right handle posts 10 and 11 extends obliquely upward from the rear end of the right and right frame 6 in the middle of the planting frame 9 and its tip end. The handle 12 is fixed to the.

The pair of transmission cases 13 and 13 are the main gear box 1
Extending from both sides of the rear to the upper rear, and each transmission case 13,
Secondary cases 14 and 14 extend downward from the inside of 13. The tips of the pair of chain cases 15 and 15 are attached to the lower ends of the secondary cases 14 and 14 so as to rotate about the horizontal axis, and the wheels 16 and 16 are attached to the rear ends thereof, respectively. The arms 17 and 17 project upward. And the rotation of the engine 2 is the main gearbox 1
・ Transmission cases 13, 13 ・ Transmitted to the left and right wheels 16, 16 via the transmission devices in the secondary cases 14, 14 and the chain cases 15, 15 and in the valleys B, B on both sides of the ridge A. It is designed to rotate and advance the body 8.

An elevating cylinder 18 is fixed to the rear part of the center of the main gear box 1 in the front-rear direction, and a piston rod 19 projects rearward therefrom. The center of the receiving member 20 having an H-shaped arm when viewed from above is attached to the rear end of the piston rod 19, and the rear end of the arm rotatably supports both sides of the horizontal bar 21 around its axis. ing. In addition, the receiving member 20 is the spring 2
2 is attached to the rear end of the piston rod 19 so as to be slidable in the front-rear direction so that the piston rod 19 can be pushed backward.
It is possible to mitigate the impact when the is projected.

The front and rear guide grooves 23, 23 are provided at the same height on the pair of left and right guide plates 24, 24, and the front and rear ends thereof are the input case 4, the left frame 5, and the input case 4, and the right frame. 6 fixed, each guide groove 23,
23 supports both ends of the horizontal bar 21 so that the end of the horizontal bar 21 does not swing up and down when viewed from the rear. A bracket 25 having a U-shaped cross section is fixed to the receiver 20, and a tip of a horizontal cylinder 26 arranged on the spring 22 is attached to the bracket 25 by a pin 27. Piston rod 2
8 projects rearward from the horizontal cylinder 26, and its rear end is connected to the projecting end of an arm 29 projecting upward from the horizontal bar 21.

The left rod arm 30 is fixed upward at the left end of the horizontal bar 21, and the right rod arm 3 is provided at the right end thereof.
1 is fixed downward. The left rod arm 30 and the left arm 17 are connected by the left rod 32, and the right rod arm 31 and the right arm 17 are connected by the right rod 33. The inner ends of the left and right side rods 34, 34 are the engine 2
Is rotatably attached to the lower abdomen of the vehicle, and the wheels 36, 36 are attached to the rear ends of the supporting legs 35, 35 extending rearward from the respective outer ends. The arms 37, 37 are each a horizontal rod 3
4,34 and upwards, each tip and arm 17,
The middle of 17 is connected by rods 38, 38.

A seedling stand 39 is provided on the machine body 8 so as to reciprocate left and right. The first swivel case 40 is provided so as to rotate in the clockwise direction (FIG. 1) around the lower horizontal axis thereof, and the second swivel case 41 is provided so as to rotate in the counterclockwise direction at the tip thereof. The above-mentioned planting claws 42 are designed so as to rotate in an elongated oval orbit up and down while maintaining the same posture. Then, the tip of the planting claw 42 passes through the rear part of the seedling mounting table 39 in the downward stroke of the swivel to take out one seedling of the seedling on the seedling mounting base 39, and the seedling is placed in the hole made by the hole making tool 43 at the lower end. Are to be transplanted.

A mounting plate 44 is fixed to the lower abdomen of the planting case 7, and a supporting rod 45 extends rearward from this, and a pair of left and right compression wheels 46, 46 are attached to the supporting rod 45. A meter panel 47 is fixed to the handle 12, and an elevating lever 48 and a horizontal lever 49 project upward from this. The height sensor 50 is arranged on the lower abdomen of the machine body 8. When the seedling planter configured as above is operated in the field, the wheels 16, 1
The rotation of 6 causes the body 8 to move forward, and during this forward movement, the planting claw 42
Takes out the seedlings on the seedling mounting table 39 and transplants them into the ridge A. Then, when the ridge A comes up to a high place during this forward movement, the ridge A and the body 8
Is narrowed (the position of the machine body 8 with respect to the upper surface of the ridge A is lowered). Then, the height sensor 50 emits a signal, the lift valve 51 is switched by the signal, the oil discharged from the pump enters the front chamber of the lift cylinder 18, and the piston rod 19 projects rearward. Then, the receiving tool 20 moves the horizontal bar 21 backward, and the left rod arm 30 and the right rod arm 31 are moved.
Pulls the left rod 32 and the right rod 33 backward, the chain cases 15 and 15 rotate clockwise, the wheels 16 and 16 descend, and the body 8 is pushed up. Similarly, the wheels 36, 36 also descend and the machine body 8 rises in a balanced posture. When the machine body 8 comes to a place where the ridge A is low, on the contrary, it descends. It should be noted that the vertical movement (switching of the oil passage by the elevating valve) is also performed by operating the elevating lever 48, as in the conventional case.

When the machine body 8 leans to the left,
The oil discharged by the pump is supplied to the front chamber of the horizontal cylinder 26 automatically or by operating the horizontal lever 49 to operate the valve. Then, the piston rod 28 projects rearward, and the arm 29 pushes the horizontal bar 21 clockwise. By this rotation, the upper end of the left rod arm 30 moves backward and the lower end of the right rod arm 31 moves forward, so that the left wheel 16 lowers with respect to the machine body 8 and the right wheel 16 moves with respect to the machine body 8. Ascending and descending to the left, the inclination of the body 8 returns to a horizontal posture. The opposite is true when the body 8 leans to the right.

According to this device, both ends of the horizontal bar 21 are supported by the guide plates 24, 24 so that the respective guide grooves 2 are formed.
Since the end of the horizontal bar 21 does not move up and down along 3 and 23, the frame structure related to the cylinders 18 and 26 increases in strength, and the operation of raising and lowering and the horizontal return of the machine body 8 is stabilized.

[Brief description of drawings]

FIG. 1 is a side view of a seedling planter according to the present invention.

FIG. 2 is a plan view thereof.

FIG. 3 is an enlarged side view of a part thereof.

FIG. 4 is a plan view thereof.

[Explanation of symbols]

 8 Aircraft 16 Wheels 18 Lifting Cylinder 19 Piston Rod 26 Horizontal Cylinder 28 Piston Rod

Claims (1)

[Claims] 1. A pair of wheels 16, 16 are provided on both sides of the machine body 8 so as to be movable up and down.
The raising and lowering cylinders 18 for raising and lowering 6, 16 in the same direction and the horizontal cylinders 26 for raising and lowering in the opposite directions are provided, and these raising and lowering cylinders 18 and the horizontal cylinders 26 are provided in the central portion of the machine body 8 in the front-back direction. Planting machine.