JPS632489Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sensor for an excavator mounted on the front of a self-propelled vehicle that removes dirt accumulated on the left side of a road after snow removal.

As shown in FIG. 1, the construction of this excavation device is such that a rotary 2, a swing mechanism 3, an earth guiding device 4, etc. are connected to the front of a vehicle body 1, and an earth removing device 5 is attached to the rear.

The rotary 2 has a horizontal rotating shaft 7 and a large number of claws 8 mounted inside a case 6 having an approximately horizontal cylindrical shape with an open front.The swinging mechanism 3 is capable of swinging the vehicle body 1 and the rotary 2. In addition to being connected by links 9, 9, a hydraulic cylinder 10 is also interposed between the link 9 and the vehicle body 1, and the rotary 2 is swung left and right by the expansion and contraction of the hydraulic cylinder 10.

The soil guiding device 9 is composed of soil guiding plates 11, 11, etc., and guides the earth and sand guided by the rotary 2 to the center of the vehicle body 1. In addition, support wheels 12, 12 are attached to the rear of the rotary 2, and the power source is guided to the rotary 2 by a universal joint 13, etc., and the front attachments of the rotary 2, etc. are raised and lowered by a hydraulic cylinder 14. .

The earth removal device 5 has a dozer 16, a tail wheel 17, etc. integrally attached to a frame 15, and is used to further remove earth and sand guided by the earth transport device 4 toward the center of the road. be.

Incidentally, normally the earth and sand is pushed to the left side beyond the guardrail 18 and accumulated, so the rotary 2 is forced to the left side by squeezing the lower side of the guardrail 18, but there is no pole in this area. Because there are obstacles 19 scattered around, such as rocks and stones, it is necessary to work while avoiding these.

Therefore, the presence of the obstacle 19 is detected by a sensor, and the swinging mechanism 3 is automatically operated to do this.

2 and 3 are plan and front views of the rotary 2 showing the sensor of this invention. First of all, the sensor 20 has the form of a rod-like body extending along the front of the rotary 2 toward the left side.

The sensor 20 is supported by a single fulcrum 21 provided on the upper surface of the cover 6, and can detect an obstacle 19 by contacting it even if it exists in front or on the left side. The sensor 20 therefore has a base 20 extending from this fulcrum 21.
a, and an extending portion 20b that is pivotally supported by a pin 22 to the base 20a, and further includes an extending portion 20b.
b is formed in the front part 20b' and the side part 20b'', and is supported by a spring 23 whose one end is locked to the cover 6 near the left end of the extending part 20b.

The sensor 20 rotates downward around the fulcrum 21 to absorb the rearward pressing force on the sensor 20 caused by the forward force of the vehicle body 1, etc. against the obstacle 19 existing in front, and also absorbs it by rotating downward around the fulcrum 21. Similarly, the obstacle 19 is rotated clockwise about the fulcrum 21 so that it can be absorbed.

Therefore, as shown in FIGS. 4 and 5, a spherical bearing 24 or the like is used for the fulcrum 21 so that the displacement of the base 20a of the sensor 20 caused by the obstacle 19 can be detected by switches 25, 26, etc., respectively.

By the way, when the rotary 2 is moved to the left side of the road by shortening the hydraulic cylinder 10 of the swinging mechanism 3 and the front part 20b' of the sensor 20 hits an obstacle 19 such as a pole, the switch is activated. 25 is activated, the solenoid 28 of the hydraulic switching valve 27
This is avoided by extending the hydraulic cylinder 10 and swinging the rotary 2 to the right. Note that the swinging stroke to the right for this avoidance does not require a full stroke of the hydraulic cylinder 10, and the avoidable stroke is set and adjusted in advance. As the vehicle body 1 moves forward, the obstacle 19 comes into contact with the side portion 20b'', but at this time the switch 26 is activated and the rotary 2 continues to be avoided to the right. 19
passes through this side portion 20b'', the spring 23 also functions to return the sensor 20 to its normal position, and both switches 25 and 26 are turned off, so the solenoid 28 is turned off and the rotary 2 returns to the left side. (See Figures 6 and 7).

Since this invention has the above-mentioned structure and functions, the following effects can be expected.

First, since the sensor 20 is a single member that detects the obstacles 19 present in front and on the sides, the number of members can be omitted and the structure can be simplified.

Moreover, since the sensor 20 is a single member and its front part 20b' and side part 20b'' are continuous, when the obstacle 19 passes along it (when the rotary 2 is performing an avoidance operation) ), the flow becomes smoother and therefore the sensing effect is better.

Furthermore, by providing two sensors, a front sensor and a side sensor, it is possible to eliminate a situation where an obstacle enters between the sensors and the sensor cannot be detected or is damaged.

[Brief explanation of drawings]

Figure 1 is a side view showing the entire drilling equipment;
FIG. 3 is a plan view and a front view of the rotary showing the mounting state of the sensor according to this invention, and FIGS. 4 and 5 are side views of the main parts showing the support structure of the sensor.
The rear view, FIGS. 6 and 7 are electrical and hydraulic circuit diagrams for control. Code, 2... Rotary, 3... Swing mechanism, 19... Obstacle, 20... Sensor.

Claims (1)

[Scope of utility model registration request] In the sensor 20 of the excavation equipment, the sensor 20 detects the presence of the obstacle 19 and, if the obstacle 19 is detected, issues a command to move the rotary 2 by the swinging mechanism 3 in a direction in which the obstacle 19 can be avoided. , an excavation device characterized in that the sensor 20 extends from the front of the rotary 2 to the left side, and is configured to be able to contact the obstacle 19 in front and on the left side to detect the presence thereof. sensor.