JPH0421769B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a method for attaching a backhoe device to a machine base so as to be able to swing up and down and to rotate left and right on the side of an operating section, and to swing the backhoe device up and down. This invention relates to a backhoe equipped with a drive device for moving and rotating left and right.

[Conventional technology]

Conventionally, the above-mentioned backhoes have not been provided with any device to protect the driver's safety during driving operations of the backhoe device.

[Problem that the invention seeks to solve]

Therefore, when the backhoe device 1 is rotated left and right while being raised on the lateral side of the driving section, the backhoe device 1 may unexpectedly enter the driving section 3 and cause the driver to be injured, as shown in FIGS. 4 and 5. There was a risk of putting it in danger.

An object of the present invention is to prevent the backhoe device from entering the operating section even when the backhoe device is operated.

[Means for solving problems]

The characteristic configuration of the backhoe safety device of the present invention is as follows:
Provided with a detection means for detecting an abnormal approach to the operating section of the backhoe device due to the drive of the backhoe device by the backhoe device blocking light or ultrasonic waves emitted from the transmitting section to the receiving section;
The apparatus is further provided with an operating means that automatically stops the drive device of the backhoe device when the backhoe device abnormally approaches the driving section based on information from the detection means, and the operation and effect thereof are as follows. .

[Effect]

In other words, if an attempt is made to drive the backhoe device and intrude into the operating section, the detection means will detect the abnormal approach of the backhoe device, and the detection means will automatically stop the drive device of the backhoe device. , the backhoe device can be prevented from intruding into the operating section, and the detection means can prevent the backhoe device from approaching abnormally by blocking the light or ultrasonic waves emitted from the transmitting section to the receiving section. Since this is a device for detecting Even if the driver unexpectedly leans out of the operating section, the light or ultrasonic waves will be blocked by the driver, and the drive device of the backhoe device will automatically stop due to the functions of the detection means and operation means. This can prevent the backhoe device from colliding with the driver who is leaning over.

〔Effect of the invention〕

Therefore, while maintaining good visibility and performing accurate excavation work, the safety of the driver can be ensured without restricting the range of movement of the driver in the driving section.

〔Example〕

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

As shown in FIGS. 1 and 2, a swivel base 4 is attached to the crawler type traveling device 7 so that it can be driven and rotated freely around the vertical axis P. In addition to providing the section 8, the swivel base 4
located at the front end of the drive unit 3 and on one side of the drive unit 3,
A swing bracket 2 that can swing horizontally around the vertical axis P ₁ and can be fixed is attached to the swivel base 4, and a backhoe device that can swing vertically and bend and extend freely by means of fluid pressure cylinders C ₁ to C ₃ is attached to the swing bracket 2. 1 is attached to form a work vehicle for performing excavation work such as side ditch digging and earth removal work.

The swing bracket 2 is attached with a pin 9 so as to be swingable left and right, and the base end of the swing cylinder _C4 is attached to the swivel base 4.

A light transmitting type transmitting part 6a and a receiving part 6b are separately attached to the lower part of the front end of the driving part 3 and the front end of the roof frame 5, and are arranged side by side in the horizontal direction, so that light passes in the vertical direction in front of the driving part 3. In addition, a plurality of transmitting parts 6a and receiving parts 6b are separately attached to the lower part of the driving part 3 and the part of the roof frame 5 above it on the side of the backhoe device 1 side of the driving part 3, A virtual surface is formed on the side of the driving section 3 through which light passes in the vertical direction.
The transmitting section 6a and the receiving section 6b allow light emitted from the transmitting section 6a to the receiving section 6b to be transmitted to the operating section 3 by being blocked by a bucket 11 attached to the tip of the backhoe device 1 or by a driver or the like. A detecting means 6 is formed to detect an abnormal approach of the backhoe device 1 or a dangerous movement of the driver to the outside of the driving section 3, and based on information from the detecting means 6, for example, the backhoe device 1 is An operating means 10 is provided which automatically stops the driving device C of the fluid pressure cylinders C ₁ to C ₃ and the swing cylinder C ₄ when the vehicle approaches abnormally.

As shown in FIG. 3, the oil supply passage and the oil drain passage are connected to the oil passages to each of the hydraulic cylinders C ₁ to C ₄ in communication with each of the hydraulic cylinders C ₁ to _{C 4} , and the other is not. Solenoid valve 1 that can be electrically switched between the communication state and
The operating means is connected to the detecting means 6 with a 0 interposed therebetween.

[Another example]

The detection means 6 may be one that transmits ultrasonic waves from a transmitter 6a.

The operation means 10 may stop the driving unit 8 in addition to automatically stopping the drive device C.

The operating section 3 may be of an open type or may be provided with an operating cabin.

Instead of the swivel base 4, a non-swivel type base may be used, and these are simply referred to as a machine base.

[Brief explanation of drawings]

The drawings show an embodiment of the backhoe safety device according to the present invention, and FIG. 1 is an overall side view of the backhoe;
FIG. 2 is an overall front view of the backhoe, and FIG. 3 is a schematic diagram showing the operating system of the safety device. FIGS. 4 and 5 are plan views illustrating a schematic operation based on the swinging operation of the backhoe device, respectively. 1... Backhoe device, 3... Operation section, 4...
Machine base, 6...detection means, 6a...transmission section, 6b...
...Receiving section, 10... Operating means, C... Drive device.

Claims (1)

[Claims] 1 At the side of the operating section 3, the backhoe device 1 is attached to the machine base 4 so as to be able to swing vertically and freely rotate left and right.
In a backhoe equipped with a drive device C for vertically swinging and left/right rotation of the backhoe device 1, abnormal approach of the backhoe device 1 to the driving section 3 due to the drive of the backhoe device 1 is detected from the transmitter 6a. A detecting means 6 is provided which detects when the backhoe device 1 blocks light or ultrasonic waves emitted to the receiving section 6b, and the backhoe device 1 detects an abnormality in the operating section based on information from the detecting means 6. A backhoe safety device is provided with an operating means 10 that automatically stops the drive device C when approached.