JPH0222Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention has a ground working device connected to a traveling vehicle body by a drive mechanism so as to be tiltable in the left-right direction of the vehicle body, and is provided with a sensor for detecting the inclination angle of the working device with respect to a horizontal plane. The present invention relates to a rolling control mechanism for a ground work vehicle, including a control mechanism that automatically operates the drive mechanism to maintain the tilt angle of the working device within a set range based on the tilt angle detected by a sensor.

In the above, when the work equipment is tilted beyond the set range and the control mechanism returns it to within the set range, conventionally, the sensor detects that the work equipment has returned to the set range and at the same time The drive mechanism was stopped. Therefore,
Immediately after returning, the work equipment will be stopped near either the upper or lower limit within the set range, and even if it is tilted due to minute irregularities, the work equipment will exceed the set range, and as a result, There was a drawback that control operations were performed more than necessary, such as when the rolling control mechanism was activated.

In view of the above points, the present invention suppresses the operation of the rolling control mechanism caused by small irregularities in a stable state where the work equipment is returned to the set range by control operation, and improves control accuracy as a whole. The purpose is to

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

A mounting bracket 5 is connected via a hydraulic cylinder 3 and a link mechanism 4 to the rear part of a traveling vehicle body on which wheels 1 and 2 are mounted on the front and rear wheels, so that the mounting bracket 5 can be driven up and down.
A seedling planting device 6 is connected to the mounting bracket 5 so as to be able to swing and tilt in the left and right directions of the vehicle body around an axis P in the longitudinal direction of the vehicle body, and two soil leveling floats 7, 7 are attached to the seedling planting device 6 on the vehicle body. They are arranged side by side in the left and right direction to form a rice transplanter.

A support shaft 9 protruding from the planting mission case 8 of the seedling planting device 6 is rotatably mounted on the mounting bracket 5, and the seedling planting device 6 is mounted around the shaft center P.
is configured to be able to swing and tilt freely.

The installation member 11 of the electric motor 10, which can be rotated forward and backward, is attached to the support bracket 5a connected to the mounting bracket 5 so as to be rotatable around the axis _Q1 in the longitudinal direction of the vehicle body, and as shown in FIG. A screw shaft 12 is rotatably connected to the output shaft 10a of the motor 10, and a cylindrical body 13 screwed onto the screw shaft 12 and an arm member 14 connected to the planting mission case 8 are connected to the output shaft 10a of the motor 10. , pivotally connected to the rolling axis P at a location deviated from the motor 10.
As the seedling planting device 6 rotates, the seedling planting device 6 is driven and tilted in the left-right direction of the vehicle body around the rolling axis P with respect to the vehicle body.

The seedling planting device 6 is equipped with a sensor 15 that detects the state of deviation from the horizontal using a weight and a photocell to detect the angle of inclination of the seedling planting device 6 with respect to the horizontal plane.

The signal from the sensor 15 and the upper limit setter 1
The signals from the upper limit comparator 18 and the lower limit comparator 1, as shown in FIG.
9, and based on the comparison results, the seedling planting device 6
When it is detected that the tilt state of the motor exceeds the set range, a command signal is input from the upper limit setter 18 or the lower limit setter 19 to the operation circuit 20 of the motor 10, and the motor 10 is automatically rotated in the forward or reverse direction. The rolling control mechanism 21 is configured to maintain the tilted state of the seedling planting device 6 within a set range.

A timer circuit 22 is interposed in the signal path from the upper limit comparator 18 and the lower limit comparator 19 to the operating circuits 20, 20, respectively, to continue the command signal to the operating circuits 20, 20 for a set time, and a sensor is provided. 15 has returned to the set range beyond its upper or lower limit, the starting circuit 2 is activated from the upper limit comparator 18 or the lower limit comparator 19.
Input the command signal to 3 and 23, and timer circuit 2
2 and 22, motor 10 and sensor 1.
A time delay mechanism 24, which causes the operation to be stopped after a set time delay from the return point detected by the time delay mechanism 24,
It consists of 24. That is, both upper and lower limit setter 1
The seedling planting device 6 is stopped in a state where the seedling planting device 6 is located at approximately the middle level of the dead zone set by 6 and 17.

In order to drive and tilt the seedling planting device 6, for example, a lift arm is provided which can be driven and oscillated by a hydraulic cylinder 3, and the lift arm and
The seedling planting device 6 may be connected to one of a pair of left and right links connecting to the machine body by a lift rod cylinder, and the seedling planting device 6 may be configured to be driven and tilted by the operation of the lift rod cylinder. The lift rod cylinder and the lift rod cylinder are collectively referred to as the drive mechanism 10.

The present invention is applicable not only to a rice transplanter equipped with a seedling planting device 6, but also to various ground work vehicles equipped with various ground work devices 6, such as a rotary tiller.

In summary, the present invention provides a rolling control mechanism for the above-mentioned ground work vehicle.
1, in returning the working device 6 to within a set range, the sensor 15 causes the working device 6 to stop operating the drive mechanism 10.
The present invention is characterized in that it is provided with a mechanism 24 that delays the set time from the time when it is detected that the value has returned to within the set range.

In other words, in order to return the working device 6 to within the set range, the drive tilting operation is continued for the set time even after the upper and lower limits of the set range are exceeded, without positioning the working device 6 near the upper and lower limits of the set range. It is stopped at the upper and lower middle level of the setting range and stabilized in that state, so even if there are minute irregularities,
As a result, the rolling control mechanism 21 can be prevented from operating, and as a whole, frequent operation of the control mechanism 21 can be avoided and control accuracy can be improved.

[Brief explanation of drawings]

The drawings show an embodiment of the rolling control mechanism for a ground work vehicle according to the present invention, in which Fig. 1 is a side view of a riding rice transplanter, Fig. 2 is a partially cutaway front view of the main parts, and Fig. 3 is Fig. 1. FIG. 4 is a block diagram showing the control mechanism. 6... Ground work device, 10... Drive mechanism, 15
...Sensor, 21...Control mechanism, 24...Time delay mechanism.

Claims (1)

[Scope of utility model registration request] A ground work device 6 is connected to the traveling vehicle body by a drive mechanism 10 so as to be tiltable in the left-right direction of the vehicle body, and a sensor 15 for detecting the inclination angle of the work device 6 with respect to a horizontal plane is attached.
A rolling control mechanism for a ground work vehicle, comprising a control mechanism 21 that automatically operates the drive mechanism 10 to maintain the inclination angle of the work device 6 within a set range based on the inclination angle detected by the , in configuring the control mechanism 21, in order to return the working device 6 to within the set range, the sensor 15 detects that the driving mechanism 10 has been stopped and that the working device 6 has returned to within the set range. A rolling control mechanism for a ground work vehicle, characterized in that a mechanism 24 for delaying a set time from a point in time is attached.