JPH0530567Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a safety device in which a sensor is detachable from a working machine such as a rotary tiller mounted on a tractor.

(b) Prior Art It has been known that a tilt angle control sensor is detachably attached to the top surface of a working machine such as a rotary tiller.

For example, Japanese Patent Application Laid-Open No. 61-256215.

(c) Problems to be solved by the invention This invention is intended to improve the above-mentioned defects of the prior art, especially when the angle of the sensor mounting base for attaching the sensor for automatic control is misaligned. In order to correct this deviation, the sensor mounting base can be adjusted forward and backward and left and right, and a harness guide is also integrally provided to support the harness extending from the automatic control sensor so that it does not sag. It is.

(d) Means for solving the problem The purpose of the present invention is as described above, and next, the configuration for achieving the purpose will be explained.

A sensor A for automatic control, which is provided with a mounting state detection switch 14 and a switch operating piece 9, is detachably attached to a sensor mounting base 4 attached to a working machine of a tractor, and the switch operating piece 9 is pressed against the sensor mounting base 4. In this configuration, the mounting state detection switch 14 is actuated to detect the mounting state, and the mounting angle of the sensor mounting base 4 is set as follows.
A sensor mounting mechanism that is adjustable in two directions, front and back and left and right, and is characterized in that the sensor mounting base 4 is integrally provided with a harness guide 2 that supports a harness 7 of a sensor A.

(E) Embodiment The purpose and configuration of the present invention are as described above, and next, the configuration for achieving the purpose will be explained.

Figure 1 is a side view of the rotary tiller, Figure 2 is a side view of the sensor mounting mechanism provided on the side of the top link mast 5, Figure 3 is a plan view, and Figure 4 is a side view of the rotary tiller.
The figure is a side view with the front and rear mounting angles changed.
The figures are also a front view, Fig. 6 is a plan view of sensor A, Fig. 7 is a side view of sensor A, Fig. 8 is a sectional view showing the inside of sensor A, and Fig. 9 is a plan view of sensor A.
, FIG. 10 is a bottom view of the sensor case 20, FIG. 11 is a sectional view, FIG. 12 is a top view of the sensor mounting base 4, and FIG. 13 is a bottom view.
14 is a cross-sectional view of FIG. 12, FIG. 15 is a cross-sectional view of FIG.
FIG. 17 is a side view as well.

Referring to FIG. 1, the overall structure of the rotary tiller will be explained.

A hydraulic case 38 is placed on the upper surface of the rear axle housing of the tractor, and the hydraulic control valve provided in the hydraulic case 38 is operated by the operating lever 3.
7 to rotate the lift arm 12 up and down, making it possible to raise and lower the rotary tiller.

Using the rotation angle of the rear cover of the rotary tillage device as a sensor, the feedback arm 19 is rotated by the arm 15, link 16, wire pedestal 18, and wire 17, and a plowing depth signal is sent to the hydraulic control valve inside the hydraulic case 38. The plowing depth is controlled by transmitting the information.

In this configuration, a mounting mechanism for the sensor A is provided on the top mast 5 of the rotary tilling device, to which the top link 29 of the three-point link mounting device is pivotally connected.

The top link mast 5 is supported on its side by reinforcing rods 28, and is also provided with a tilling cover adjustment handle 10 and a depth adjustment handle 11.

Next, the attachment portion of the L-shaped bracket 1 to the top link mast 5 will be explained with reference to FIGS. 2, 3, and 4.

The L-shaped bracket 1 is attached to the left side of the toplink mast 5, but it is not simply attached with bolts, but the left and right angle can be adjusted using two upper and lower adjustment bolts 3a and 3b. It is configured to be possible.

Furthermore, the front and rear inclination angles can be adjusted using three bolt holes provided in the L-shaped bracket 1.

That is, as shown in FIG. 5, the adjustment bolt 3b is a bolt inserted into the lower hole and is not adjusted, but the upper adjustment bolt 3a is inserted into the two upper mounting holes of the L-shaped bracket 1. It can be inserted in either direction, allowing the front and rear angles to be adjusted.

That is, if the adjustment bolt 3a is inserted into the front bolt hole in the state shown in Figure 2, the front part will be raised significantly, and if the adjustment bolt 3a is inserted into the rear bolt hole as shown in Figure 4. The front part has a lower rise.

Further, the adjustment bolt 3a itself is configured as a double nut as shown in FIG. 5, and by changing the fastening position of the double nut, the L-shaped bracket 1
The left and right angles can be adjusted.

With this configuration, the angle of inclination of the L-shaped bracket 1 can be adjusted both forward and backward as well as left and right.

Further, a harness guide 2 is fixedly installed on the bottom surface of the L-shaped bracket 1.

The harness guide 2 is made of spring steel and has elasticity, and has three guide parts at the front and rear.

That is, a harness guide part 2b that holds the harness 7 of the sensor A arranged vertically is formed in the front part, a front support part 2c for the plowing depth control wire 17 is formed in the lower part, and a plowing depth control wire is also provided in the rear part. 17 rear support portions 2a are constituted. The support portion of the harness guide 2 is constructed by winding spring steel into a coil shape.

Figures 2, 3, and 4 show fixing bolts 33a, 33b on the L-shaped bracket 1 to fix the left and right adjustment base 6.
The sensor mount 4 is further fixed on top of the sensor mount 4, and the sensor A itself is removed.

Next, Figure 6, Figure 7, Figure 8, Figure 9, and Figure 10.
The configuration of sensor A will be explained with reference to FIG.

The outer periphery of the sensor A is covered with a sensor case 20. A protruding hole 20a for the switch operating piece 9 is opened in the bottom surface of the sensor case 20. A detachable locking plate 8 made of a spring plate is attached to the bottom surface of the sensor case 20.

Rotate the detachable locking plate 8 clockwise into the insertion hole of the insertion notch 4a of the sensor mount 4 and slide the cam surface to the thick part 4b of the sensor mount 4.
It is something that locks.

Inside the sensor case 20, a weight pendulum 13, which constitutes the main part of the sensor A, is disposed.The weight pendulum 13 has its upper end pivoted and its lower end tilts according to the inclination. This tilting is detected by the detection switch 35 and transmitted to the control box by the harness 7 as a tilt angle control signal for the working machine.

In the present invention, an installation state detection switch 14 is provided below the detection switch 35, a switch actuation piece 9 is protruded from the installation state detection switch 14, and the tip of the switch actuation piece 9 is connected to the portion of the left and right adjustment base 6 mentioned above. The switch is turned ON by contacting the pressure spring 25 provided in the
The situation is as follows.

Therefore, the installation state detection switch 14 is configured so that it does not transmit a signal unless the switch operating piece 9 is pushed in and is in the ON state.
When the sensor A is removed from the sensor mounting base 4, the switch actuating piece 9 is released from the pressed state by the pressing spring 25, turns OFF, and the control stops.

12 to 15, the shape of the sensor mounting base 4 is illustrated.

When installing the sensor A on the sensor mounting base 4, insert the detachable locking plate 8 into the insertion notch 4a and turn it clockwise.
It gradually rides up the cam surface until it reaches the thick wall portion 4b and is fixed.

When removing the sensor A, rotate the sensor A counterclockwise so that the attachment/detachment locking plate 8 is attached to the thick part 4b.
It can be removed at the fitting notch 4a apart from the holder.

In Figures 16 and 17, the left and right adjustment stand 6
A portion of the pressing spring 25 is illustrated. The left and right adjustment base 6 is fixed to the L-shaped bracket 1 with fixing bolts 33, and the sensor mounting base 4 is fixed to the left and right adjustment base 6 with screws. Further, the pressing spring 25 is also fixed to the left and right adjustment base 6 with rivets.

(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, if the angle of the sensor mount for attaching the sensor for automatic control is misaligned, we made it possible to adjust the sensor mount back and forth and from side to side in order to correct this misalignment. This makes it possible to prevent erroneous control operations caused by angle deviations from occurring.

Second, since the harness guide 2 is integrally provided on the sensor mounting base 4, the harness 7 extending from the sensor A toward the tractor can be engaged and supported by the harness 7 when the sensor A is installed. This made it possible to eliminate the problem of the harness 7 wobbling around every time the work machine was raised or lowered.

[Brief explanation of the drawing]

Figure 1 is a side view of the rotary tiller, Figure 2 is a side view of the sensor mounting mechanism provided on the side of the top link mast 5, Figure 3 is a plan view, and Figure 4 is a side view of the rotary tiller.
The figure is a side view with the front and rear mounting angles changed.
The figures are also a front view, Fig. 6 is a plan view of sensor A, Fig. 7 is a side view of sensor A, Fig. 8 is a sectional view showing the inside of sensor A, and Fig. 9 is a plan view of sensor A.
, FIG. 10 is a bottom view of the sensor case 20, FIG. 11 is a sectional view, FIG. 12 is a top view of the sensor mounting base 4, and FIG. 13 is a bottom view.
14 is a cross-sectional view of FIG. 12, FIG. 15 is a cross-sectional view of FIG.
FIG. 17 is a side view as well. A...Sensor, 1...L-type bracket, 2...
...Harness guide, 4...Sensor mounting base, 5...
...Top link mast, 6...Left and right adjustment stand, 7...
... Harness, 8 ... Detachment locking plate, 9 ... Switch operation piece, 14 ... Installation state detection switch.

Claims (1)

[Scope of utility model registration request] A sensor A for automatic control, which is provided with a mounting state detection switch 14 and a switch operating piece 9, is detachably attached to a sensor mounting base 4 attached to a working machine of a tractor, and the switch operating piece 9 is pressed against the sensor mounting base 4. By doing so, in a configuration in which the attachment/detachment status can be detected by operating the attachment status detection switch 14, the attachment angle of the sensor attachment base 4 can be adjusted in two directions, front and back and left and right, and the attachment status of the sensor attachment base 4 can be adjusted. This is a sensor mounting mechanism characterized in that a harness guide 2 that supports a harness 7 of a sensor A is integrally provided.