JP3168997B2 - Farm work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of agricultural work machines such as a seedling transplanter for transplanting seedlings to ridges and a sowing machine for sowing seeds to ridges.

[0002]

2. Description of the Related Art During the operation, if the position of the body is shifted left and right with respect to the ridge and seedlings are planted or sown near the left and right ends of the ridge, there is a problem that the grown crop is inclined and deformed.
Therefore, conventionally, for example, as shown in Japanese Utility Model Application Laid-Open No. 2-6408, in a transplanting machine in which a seedling is transplanted to a ridge by a transplanting device while traveling by a driven rotating wheel, There has been a configuration in which a roller that is pressed by a spring is provided on the body so that the body travels following the ridge, and the transplanting position of the transplanting device is maintained at a constant position on the left and right with respect to the ridge.

[0003]

The above-mentioned conventional transplanter is
When the aircraft shifts away from the ridge to the left or right,
Since the spring that presses the rollers is extended and the rest of the body is pulled back to the ridge by the restoring force of the spring, if the body is heavy, the left and right deviations from the ridge at the working position will not be quickly corrected, If the spring has a large restoring force, the ridge may be broken.

In view of the above, the present invention has been made so that even when the body is heavy, the right and left displacement of the working position with respect to the ridge can be quickly corrected, and further, there is no possibility that the ridge is broken for the correction. Make it an issue.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to an agricultural work machine that works on a ridge by a work device 13 while traveling on wheels 2 driven and rotated. And a drive unit 20 for moving the working device 13 laterally to the left and right with respect to the wheels 2, based on the detection result of the sensor 4. The agricultural working machine is characterized in that the drive unit 20 is controlled so that the working position is set to the ridge.

[0006]

The agricultural working machine works on the ridges by the working device 13 while running on the wheels 2 driven and rotated.
During the work, the sensor 4 detects the working position of the working device 13 with respect to the ridge in the left-right direction, and based on the detection result of the sensor 4, the working device 13 is laterally moved left and right with respect to the wheel 2. The drive unit 20 is operated to control the working position of the working device 13 in the left-right direction to be the set position with respect to the ridge.

[0007]

According to the present invention, the working position of the working device 13 in the left-right direction with respect to the ridge is properly detected by the sensor 4, so that the work is performed at a proper position in the left-right direction with respect to the ridge. Is less likely to occur. Further, even if the entire body is heavy, the shift of the working position from the left to the right with respect to the ridge is quickly corrected, and further, there is no risk of breaking the ridge due to the correction.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS.
The vehicle travels with a pair of left and right wheels 2 and a rear auxiliary wheel 6 supported on the ground.
Transmission case 8, hydraulic pump 9 and lift cylinder 1
0, etc., a height adjusting device 11 comprising a seedling, a seedling tank 12 for accommodating and feeding seedlings, and a seedling plant for holding the seedlings fed at the rear end of the seedling tank 12 and planting them on the lower soil surface An attachment device 13, a steering handle 14, and the like are arranged.

A base of a wheel transmission case 16 is movably fitted in an axial direction to a wheel transmission shaft 15 composed of a spline shaft projecting to the left and right sides of the transmission case 8. Wheel transmission shaft 15
And the chain is transmitted from the sprocket to the axle 17 of the wheel 2 at the front end of the wheel transmission case 16 so that the left and right distances and the left and right positions of the left and right wheels 2 with respect to the vehicle body 1 are determined. The wheels 2 are driven and rotated while being changeable.

A base portion of the wheel transmission case 16 is rotatably provided around the wheel transmission shaft 15, and boss portions 18 of bearings of the wheel transmission shaft 15 on both right and left sides of the wheel transmission case 16.
A hydraulic cylinder 20 is provided on a swing arm 19 that is rotatable around the shaft by a hydraulic pressure so as to be able to expand and contract in the axial direction. A piston 21 of the hydraulic cylinder 20 is fixed to the wheel transmission case 16. , Body 1
Are provided so as to move in the axial direction of the wheel transmission shaft 15 with respect to the left and right wheel transmission cases 16. Reference numeral 24 denotes a flexible hose that communicates between the opposing portions in the hydraulic cylinder 20.

The vehicle height changing / adjusting device 11 is configured to perform the vertical position of the auxiliary wheels 6 in conjunction with the vertical position of the left and right wheels 2. Right and left ends of a rod 25 which is moved back and forth by the expansion and contraction of the hydraulic cylinder 10;
When the rod 25 moves rearward due to the extension of the hydraulic cylinder 10, the wheel transmission case is connected via the left and right rods 26, the swing arm 19, the hydraulic cylinder 20, the piston 21, and the like. The vehicle height is increased by interlocking the rotation of the wheel 2 with the wheel 16 downward.

Both ends of the rod 25 are connected by a rod 29 to an arm 28 integrally supporting a support arm 27 of the auxiliary wheel 6, and the auxiliary wheel 6 is configured to rotate in the same direction as the wheel 2. Reference numeral 30 denotes a rotation support shaft of the support arm 27.
Reference numeral 31 denotes a telescopic adjusting rod, which is a rod 25 for the hydraulic cylinder 10.
The height difference between the right and left wheels 2 can be controlled by changing and adjusting the inclination angle of the right and left wheels appropriately.

In front of the seedling planting position by the seedling planting device 13, a sled-shaped height sensor 32 that slides on the soil surface is provided.
By the vertical movement of the height sensor 32, a hydraulic control valve 34 provided in a hydraulic circuit 33 from the hydraulic pump 9 to the hydraulic cylinder 10 is controlled and interlocked so that the height of the vehicle body 1 from the soil surface is maintained substantially constant. I do. Reference numeral 35 denotes a cultivator for cultivating the soil surface after planting the seedlings.

Further, the seedling planting apparatus 1 is arranged so that the seedling planting position in the left-right direction of the seedling planting apparatus 13 is located at the center in the left-right direction with respect to the ridge.
A moving device 3 for controlling the lateral movement of the wheel 3 to the left and right with respect to the wheel 2 is provided. The moving device 3 is, in this embodiment,
A left-right movable configuration between the wheel transmission shaft 15 and the left and right wheel transmission cases 16, a hydraulic cylinder 20, its hydraulic circuit 22, and a ridge sensor 4 that interlocks the hydraulic control valve 3 of the hydraulic circuit 22 are provided. It is provided and configured. The ridge sensor 4 includes a pair of left and right sensor arms 37 supported by a shaft 36 so as to be vertically movable on both left and right sides of a height sensor 32 supported via a support shaft 40 with respect to the vehicle body 1. The roller 38 is provided to rotate in contact with the ridge surface. The hydraulic control valve 23 is switched and controlled according to the difference in height between the tip portions of the left and right sensor arms 37 of the ridge sensor 4, and the hydraulic cylinder 20 moves the wheel 2 toward the side where the sensor arm 37 has been moved upward. The vehicle body 1 is moved, and the right and left seedling planting positions with respect to the ridges by the seedling planting device 13 of the vehicle body 1 are moved. Further, the opposed parts of the left and right hydraulic cylinders 20 are connected by a hose 24, and as shown in the hydraulic circuit diagram, the piston extruding chambers of the left and right hydraulic cylinders 20 are provided so that the pressure oil communicates with each other. The piston 21 on one side of the projection 20 projects so that the piston 21 on the other side is retracted at the same time as the piston 21 on the other side, whereby the interval between the left and right wheels 2 is maintained substantially constant while the seedling planting apparatus 13 is moved. The provided vehicle body 1 is adapted to move laterally left and right. When the left and right rollers 38 of the ridge sensor 4 are located on the left and right sides of the top of the ridge, and the pair of left and right sensor arms 37 are at the same height, the seedling planting position by the vehicle body 1 and the seedling planting device 13 is ridged. At this time, the hydraulic control valve 23 is at the neutral position. When there is a height difference between the left and right sensor arms 7, the sensor arm 7 in which the seedling planting position is lower than the ridges.
To the hydraulic control valve 2 at this time.
3 is switched to operate the left and right hydraulic cylinders 20 so as to correct the seedling placement position to the left and right center position of the ridge. 3
Reference numeral 9 denotes an adjustment lever for changing and adjusting the vertical rotation area of the height sensor 32 around the sensor support shaft 40.

The vehicle 1 is driven by the driving of the wheels 2, and travels along the grooves B on both sides of the ridge A. The height difference between the ridge A and the groove B, that is, the height of the ridge upper surface, In response, the height sensor 32 rotates up and down around the sensor support shaft 40, and when the height becomes higher than a predetermined area, the vehicle body 1 is raised with respect to the wheels 2 by the hydraulic cylinder 10, and is lowered when it becomes lower, The height of the vehicle body 1 with respect to the ridge upper surface and the seedling planting depth by the seedling planting device 13 are controlled to be kept constant.

When a pair of left and right ridge sensors 4 are in contact with the left and right side surfaces of the ridge A to detect the same height (FIG. 3), the vehicle body 1 is located at the left and right center of the ridge A. When the ridge portion A bends to the left or right side (FIG. 4), the sensor arm 7 of the displaced ridge sensor 4 is pushed up (moves in the direction C), and the sensor arm 7 of the opposite ridge sensor 4 is moved. Is moved down (moves in the D direction). As a result, a height difference is generated between the left and right sensor arms 7 of the ridge sensor 4, whereby the hydraulic control valve 23 is switched, and the hydraulic cylinder 20 causes the vehicle body 1 to move to the left and right wheel transmission cases 16. Is moved toward the higher side of the sensor arm 7 (in the direction E). As a result, the height sensor 32, the ridge sensor 4, the seedling planting device 13, and the like provided on the vehicle body 1 travel along the left and right centers of the ridge as shown in FIG.

Although the ridge sensor 4 has the sensor arm 37 attached to the height sensor 32, the ridge sensor 4 may be attached to the vehicle body 1 or a member integral with the vehicle body 1 independently of the height sensor 32. FIGS. 7 to 9 show a different embodiment. The difference between this embodiment and the above embodiment is that the ridge sensor 4 is provided at the front end of the vehicle body 1 and the bracket provided on the vehicle body 1 is vertically moved. A pair of left and right rollers 43 are rotatably provided at the tip of the sensor arm 42. The rollers 43 are formed in a drum shape and have a ridge portion. A is configured to easily roll along both left and right side surfaces of A, and is configured to constantly roll along the center of the ridge portion A.

By moving the ridge sensor 4 right and left with respect to the vehicle body 1, the hydraulic control valve 23 of the hydraulic circuit 22 is interlocked so as to be switched. The seedling transplanter of the above embodiment is a seedling transplanter that performs seedling planting work on ridges by the seedling transplanter 13 while traveling on the driven rotating wheels 2. 4 for detecting seedling planting position
And a drive unit (hydraulic cylinder) 20 for laterally moving the seedling planting device 13 left and right with respect to the wheels 2, and based on the detection result of the sensor 4, the seedling planting device 13 in the left-right direction. The drive unit 20 is controlled so that the position becomes a set position with respect to the ridge, whereby the right and left seedling planting position of the seedling planting device 13 with respect to the ridge is appropriately detected by the sensor 4. Then, the seedling planting operation is performed at an appropriate position on the left and right with respect to the ridge, so that the crop is less likely to be deformed. In addition, even if the entire body is heavy, the right and left displacement of the seedling placement position with respect to the ridge is quickly corrected, and there is no risk of breaking the ridge due to the correction.

[Brief description of the drawings]

FIG. 1 is a side view of a seedling plant.

FIG. 2 is a plan view of a seedling planter.

FIG. 3 is a front view showing an operation state of a part of the seedling transplanter;

FIG. 4 is a front view showing a part of the operation of the seedling planter;

FIG. 5 is a side view showing a part of the mechanism of the seedling planter.

FIG. 6 is a hydraulic circuit diagram of the seedling planter.

FIG. 7 is a plan view of a seedling plant of another configuration.

FIG. 8 is a front view showing an operation state of a part of a seedling plant having another configuration.

FIG. 9 is a hydraulic circuit diagram of a seedling plant of another configuration.

[Explanation of symbols]

 2: Wheel 3: Moving device 4: Ridge sensor 13: Seedling planting device (working device) 20: Hydraulic cylinder (drive unit)

Claims (1)

(57) [Claims] 1. An agricultural work machine that works on a ridge by a work device 13 while traveling on wheels 2 that are driven and rotated, a sensor 4 for detecting a work position of the work device 13 in the left-right direction with respect to the ridge, and a work device 13. And a drive unit 20 for laterally moving the drive unit 20 left and right with respect to the wheel 2. Based on the detection result of the sensor 4, the drive unit 20 moves the working device 13 in the left-right direction to a set position with respect to the ridge. Agricultural working machine characterized in that it is configured to control the operation.