JP3169018B2 - 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 roller is extended and the entire 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 transplant position will not be quickly corrected, When the restoring force of the spring was large, the ridge was sometimes broken.

[0004] Therefore, an object of the present invention is to make it possible to quickly correct the left and right displacement of the working device with respect to the ridge even if the body is heavy, and to reduce the risk of breaking the ridge for the correction. In addition, it is another object of the present invention to obtain an agricultural work machine capable of performing proper work by setting the work position in the vertical direction of the work device to a set position with respect to the ridge.

[0005]

In order to solve the conventional problem, the invention according to claim 1 is directed to an agricultural work machine that performs work on a ridge by a work device 13 while traveling by wheels 2 that are driven and rotated. The working device 13 is moved with respect to the wheels 2 so that the working position of the working device 13 in the left-right direction is set to the ridge based on the detection result of the sensor 4 that detects the working position of the working device 13 with respect to the ridge in the left-right direction. The working device 13 for controlling the left and right driving unit 20 that moves laterally to the left and right
Vertical drive that moves the working device 13 up and down with respect to the wheels 2 so that the working position in the up and down direction of the working device 13 is set to the set position with respect to the ridge based on the detection result of the sensor 32 that detects the working position in the up and down direction The agricultural working machine is configured to control the part 10. The invention according to claim 2 is a sensor that detects the working position of the working device 13 in the left-right direction with respect to the ridge and the vertical direction of the working device 13 with respect to the ridge. The agricultural work machine according to claim 1, wherein the sensor (32) for detecting the work position is arranged close in the longitudinal direction of the machine when viewed from the side of the machine.

[0006]

The agricultural working machine according to the first aspect of the present invention
The work is performed on the ridges by the working device 13 while traveling by the driven rotating wheels 2. 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 right and left driving unit 20 is operated, and the working position of the working device 13 in the left and right direction is controlled to be the set position with respect to the ridge. Further, the sensor 32 detects the working position of the working device 13 with respect to the ridge in the vertical direction, and based on the detection result, the working device 13
The vertical drive unit 10 that moves up and down with respect to is operated, and the vertical working position of the working device 13 is controlled to be the set position with respect to the ridge.

Accordingly, the working device 13 can be easily and properly moved in the left-right and up-down directions with respect to the wheels 2. Therefore, work can be performed at appropriate positions in the left, right, up and down directions with respect to the ridge, and the conventional problem can be solved.
The agricultural working machine according to the second aspect of the present invention includes a sensor 4 for detecting a horizontal working position of the working device 13 with respect to the ridge and a sensor 32 for detecting a vertical working position of the working device 13 with respect to the ridge. Since the ridges are located close to each other in the longitudinal direction of the fuselage, it is possible to detect the state of the ridges at substantially the same position during the work travel, so that the above-mentioned left-right and up-down control is properly performed on the ridges, and a good agricultural operation is performed. I can do it.

[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 hydraulic cylinder 10
Height adjusting device 11 comprising: a seedling tank 12 for accommodating and feeding seedlings; seedling planting for holding seedlings to be fed to the rear end of the seedling tank 12 and planting them on the lower soil surface The device 13 and the steering handle 14 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 left and right driving unit (hydraulic cylinder) 20 for moving the seedling planting device 13 laterally to the left and right with respect to the wheels 2. Based on the detection result of the sensor 4, the seedling planting device 13 in the left and right direction is planted. The right and left drive unit 20 is controlled so that the attachment position is set to the ridge, whereby the right and left seedling planting position of the seedling planting device 13 with respect to the ridge is appropriately determined by the sensor 4. , And the seedling planting operation is performed at an appropriate position on the left and right with respect to the ridge, so that deformation of the crop hardly occurs. 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 planter.

FIG. 2 is a plan view of the seedling transplanter.

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

FIG. 4 is a front view showing an operation state of a part of the seedling transplanter.

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 transplanter.

FIG. 7 is a plan view of a seedling transplanter having 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]

 Reference Signs List 2 wheels 3 moving device 4 ridge sensor 10 hydraulic cylinder (vertical drive unit) 13 seedling planting device (working device) 20 hydraulic cylinder (left and right drive unit) 32 height sensor

Claims (2)

(57) [Claims] 1. An agricultural work machine that works on a ridge by a working device 13 while traveling on wheels 2 that are driven and rotated, based on a detection result of a sensor 4 that detects a working position of the working device 13 in the left-right direction with respect to the ridge. The right and left drive unit 20 that moves the working device 13 laterally to the wheels 2 is controlled so that the working position of the working device 13 in the left and right direction is set to the ridge, and the vertical direction of the working device 13 with respect to the ridge is controlled. The vertical drive unit 10 that moves the working device 13 up and down with respect to the wheels 2 based on the detection result of the sensor 32 that detects the working position of the working device 13 so that the working position in the vertical direction of the working device 13 becomes the set position with respect to the ridge. A farm work machine characterized in that it is configured to be controlled. 2. A sensor 4 for detecting the working position of the working device 13 in the left-right direction with respect to the ridge and a sensor 32 for detecting the working position of the working device 13 in the vertical direction with respect to the ridge. The agricultural work machine according to claim 1, wherein the agricultural work machine is arranged.