JP3116357B2 - Farm work machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural work machine such as a seedling transplanter for transplanting seedlings to ridges and a sowing machine for sowing seeds to ridges.

[Conventional technology]

During the operation, if the position of the airframe shifts 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 Laid-Open No. 2-6408,
In a transplanting machine in which a seedling is transplanted to a ridge by a transplanting device while traveling on a driven rotating wheel, rollers are provided on the body of the ridge so that the right and left side surfaces of the ridge are pressed by springs so that the body follows the ridge. In some cases, the implanting position of the implanting device is maintained at a constant position on the left and right with respect to the ridge.

[Problems to be solved by the invention]

In the above-described conventional transplanter, when the body is shifted to the left or right with respect to the ridge, a spring that presses the roller is extended, and the entire body is pulled back to the ridge by the restoring force of the spring. Therefore, when the body is heavy, the shift of the working position from the left to the right with respect to the ridge is not quickly corrected, and when the restoring force of the spring is large, the ridge may be broken.

Therefore, an object of the present invention is to make it possible to quickly correct left and right deviations of a working position with respect to a ridge even if the body is heavy, and to reduce the risk of breaking the ridge for the correction.

[Means for solving the problem]

In order to solve the above-mentioned problem, the present invention provides an agricultural work machine that performs work on a ridge by a work device 13 while traveling by a driven rotating wheel 2, wherein the work device 13 is movable left and right with respect to the wheel 2. And the working device 13
The agricultural working machine is characterized in that left and right movements of the wheel 2 with respect to the wheel 2 are performed by a driving means 20 provided between the working device 13 side and the wheel 2 side.

[Functions and Effects of the Invention]

In the agricultural working machine of the present invention, the working device 13 is provided so as to be movable left and right with respect to the wheel 2, and the left and right movement of the working device 13 with respect to the wheel 2 is provided between the working device 13 and the wheel 2 side. Since it is configured to be driven by the driving means 20, the work can be performed at an appropriate position on the left and right with respect to the ridge, and the crop is less likely to be deformed. Correction can be performed quickly, and the possibility of breaking the ridge for the correction is small.

〔Example〕

1 to 6, a vehicle body 1 travels with a pair of left and right wheels 2 and a rear auxiliary wheel 6 grounded and supported. On the vehicle body 1, an engine 7, a transmission case 8. Height adjustment device 11 consisting of hydraulic pump 9, lift cylinder 10, etc., seedling tank for storing and feeding seedlings
12. A seedling planting device 13 for holding the seedlings fed to the rear end of the seedling tank 12 and planting the seedlings below the soil surface, a steering handle 14, and the like are arranged.

The base of a wheel transmission case 16 is movably fitted in the 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, and the sprocket at the base of the wheel transmission case 16 is attached to the wheel transmission shaft. 15 so as to rotate integrally with it, and the wheel transmission case
The chain is transmitted through the axle 17 of the wheel 2 at the front end 16 so that the left and right wheels 2 can be transmitted and rotated while the left-right distance and the left-right position with respect to the vehicle body 1 can be changed.

The base of the wheel transmission case 16 is provided rotatably around the wheel transmission shaft 15, and a swing arm that is rotatable around the boss 18 of the bearing of the wheel transmission shaft 15 on both left and right sides of the wheel transmission case 16. 19, a hydraulic cylinder 20 is provided which can be extended and contracted in the axial direction by hydraulic pressure, and a piston 21 of the hydraulic cylinder 20 is fixed to a wheel transmission case 16. It is provided to move in the axial direction of the wheel transmission shaft 15 with respect to 16. Reference numeral 24 denotes a flexible hose that communicates between opposing portions in the hydraulic cylinder 20.

The vehicle height change 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 shafts 2. A rod 25 moved back and forth by the expansion and contraction of the hydraulic cylinder 10
The left and right ends and the swing arm 19 are connected by a rod 26. When the rod 25 moves rearward due to the extension of the hydraulic cylinder 10, the left and right rods 26, the swing arm 19, the hydraulic cylinder 20, And wheel transmission case via piston 21
The vehicle height is raised by interlocking the rotation of the wheel 2 portion 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. Numeral 31 denotes a telescopic adjustment rod, which is provided so as to appropriately change and adjust the inclination angle of the rod 25 with respect to the hydraulic cylinder 10 and can control the height difference between the left and right wheels 2.

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.
The hydraulic control valve 34 provided in the hydraulic circuit 33 from the hydraulic pump 9 to the hydraulic cylinder 10 is controlled by the vertical movement of the hydraulic pump 32 to control the vehicle body 1 so that its height from the soil surface is maintained substantially constant. 35 is a cultivator for cultivating the soil surface after seedling planting.

Further, a moving device 3 for controlling the lateral movement of the seedling planting device 13 to the left and right with respect to the wheel 2 is provided so that the seedling planting position in the left-right direction of the seedling planting device 13 is located at the left and right center position with respect to the ridge. . In this embodiment, the moving device 3 is provided with the wheel transmission shaft.
The hydraulic cylinder 20 and its hydraulic circuit 22 and the ridge sensor 4 for interlocking the hydraulic control valve 3 of the hydraulic circuit 22 are provided. ing. Therefore, the seedling planting device 13 is provided so as to be movable left and right with respect to the wheel 2, and the left and right movement of the seedling planting device 13 with respect to the wheel 2 is provided between the seedling planting device 13 and the wheel 2 side. It is configured to be driven by the driving means 20.

The ridge sensor 4 is vertically movable on both left and right sides of a height sensor 32 supported on the vehicle body 1 via a support shaft 40.
And a pair of left and right sensor arms 37 supported by the above, a roller 38 provided at the distal end thereof and rotating in contact with the ridge surface, and the like. The hydraulic control valve 23 is switched and controlled by the height difference 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 to move the right and left seedling planting positions with respect to the ridges by the seedling planting device 13 of the vehicle body 1. Also, 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 as to communicate pressure oil, and the left and right hydraulic cylinders are provided. The piston 21 on one side of 20 protrudes and at the same time operates so that the piston 21 on the other side retracts,
The vehicle body 1 provided with the seedling planting device 13 moves laterally left and right while maintaining the distance between the left and right wheels 2 substantially constant. 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 Is detected at the left and right central positions, and at this time, the hydraulic control valve 23 is at the neutral position. If there is a difference in height between the left and right sensor arms 7, it is detected that the seedling placement position has shifted to the sensor arm 7, which is at a lower position with respect to the ridge. Switching is performed so as to operate the left and right hydraulic cylinders 20 so as to correct the position to the left and right center position of the ridge. Reference numeral 39 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 body 1 is driven by the driving of the wheels 2, but the ridges A
Of the ridge A and the groove B
The height sensor 32 pivots up and down around the sensor support shaft 40 in accordance with the altitude difference from the height of the ridge upper surface. Raise the car body and lower it when it gets lower.
And the seedling planting depth by the planting apparatus 13 is controlled to be constant.

When the pair of left and right ridge sensors 4 are in contact with the left and right side surfaces of the ridge portion A to detect the same height (FIG. 3), the vehicle body 1 is located at the left and right central portions of the ridge portion A. When 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. It is moved down (moves in the D direction). For this reason, 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 moves the vehicle body 1 to the left and right wheel transmission cases 16. Sensor arm 7
Is moved (in the direction E) toward the higher side of. 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.

The ridge sensor 4 includes a sensor arm 37 and a height sensor 32.
However, it may be mounted on the vehicle body 1 or a member integral with the vehicle body 1 independently of the height sensor 32.

FIG. 7 to FIG. 9 show a different embodiment. This embodiment is different from the above-described embodiment in that a ridge sensor 4 is provided at the front end of the vehicle body 1 and a bracket provided on the vehicle body 1 is provided. The sensor arm 24 is provided rotatably left and right around a vertical support shaft 41, and a pair of left and right rollers 43 are provided rotatably at the tip of the sensor arm 42. The rollers 43 are formed in a drum shape. The ridge A is configured to easily roll along both left and right side surfaces, and is configured to always roll along the center of the ridge A. The right and left movement of the ridge sensor 4 with respect to the vehicle body 1 causes the hydraulic control valve 23 of the hydraulic circuit 22 to switch so as to be switched.

As described above, in the agricultural working machine that performs work on the ridges by the working device 13 while traveling on the wheels 2 that are driven and rotated, the working device 13 is provided so as to be movable left and right with respect to the wheels 2. Since the left and right movement of the wheel 13 with respect to the wheel 2 is driven by the driving means 20 provided between the working device 13 and the wheel 2 side, the work can be performed at an appropriate position on the left and right with respect to the ridge, and Deformation is less likely to occur, and even if the entire body is heavy, it is possible to quickly correct left and right deviations from the ridge at the working position, and
There is little risk of breaking the ridge for the correction.

[Brief description of the drawings]

 Each drawing will be described briefly. Fig. 1: Side view of seedling plant Fig. 2: Plan view of seedling plant Fig. 3: Front view showing partial operation of seedling plant Fig. 4: Partial operation of seedling plant Fig. 5: Side view showing a part of the mechanism of the seedling plant Fig. 6: Hydraulic circuit diagram of the seedling plant Fig. 7: Plan view of the seedling plant of another configuration Fig. 8: Another configuration Fig. 9: Hydraulic circuit diagram of a seedling transplanter having another configuration Fig. 9: Brief description of main symbols in the figure. 2: Wheel 3: Moving device 13: Seedling planting device (working device)

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. The work device 13 is provided so as to be movable left and right with respect to the wheels 2, and the work device 13 The agricultural working machine is characterized in that the left and right movement of the wheel 2 with respect to the wheel 2 is performed by a driving means 20 provided between the working device 13 side and the wheel 2 side.