JPH10114971A - Contact preventive device for slewing heavy machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device, in which the accident of an operator being caught between a heavy machine and a structure is prevented and which has simple structure and hardly gets trouble. SOLUTION: The contact preventive device 20 is composed of flexible bodies 40 installed on an outer circumferential section, particularly a rear section and left-right both side sections at the dead angles of an operator in the revolving super structure 12 of the slewing heavy machine 10. Bars 22 made of a foamed resin are arranged while being separated from the outer circumferential section of the revolving super structure 12 in an approximately circumferential shape along the outer circumferential section in the flexible bodies 40, and the flexible bodies 40 consist of the bars 22 and supports 30 detachably mounting the bars 22 on the outer circumferential section of the revolving super structure 12. According to such constitution, the entering of the operator into the slewing area of the heavy machine is prevented completely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing a contact accident between a rear counter weight of a swing heavy machine and an operator beforehand.

[0002]

2. Description of the Related Art An operator of a turning heavy machine such as a backhoe cannot see the lower portion of a rear counterweight, and the turning heavy machine is not usually equipped with a contact prevention device. Accidents may occur when a worker contacts heavy equipment or is caught between heavy equipment and a structure.

For this reason, barricades, color cones, ropes, single pipes, and the like are conventionally installed around the heavy equipment to prevent people from entering the turning area.
Since the barricade and the like must be moved and installed in accordance with the movement of the heavy equipment, there is a problem that the operation is complicated and the installation tends to be neglected. On the other hand, it is also known to provide the following sensors or the like in a turning heavy machine in order to avoid complicated work such as installing the above-mentioned barricade.

(1) A device that detects approach using radio waves and magnetic fields. Transmitters and receivers of radio waves or magnetic fields are installed on heavy equipment, and when a worker carries a transponder or launcher and enters a reception area within a certain distance, detection is performed. The operator needs to carry the device, which is greatly affected by environmental conditions, and the operating distance is uncertain.

[0005] (2) A device utilizing an ultrasonic wave and a photoelectric switch. An ultrasonic or photoelectric sensor is installed on the heavy equipment to detect an approaching obstacle. The operating distance is uncertain due to environmental conditions, and the distance cannot be adjusted in many cases.

(3) A system using a monitoring ITV. Although a camera is installed on the heavy equipment and the rear and side surfaces are monitored by the monitor of the driver's seat, there is a risk that the operator may overlook it.

[0007] The rotating heavy machine has severe operating conditions such as outdoor use in hot weather or rainy weather, use in close proximity to a structure, influence of vibration or impact generated by use, and prevents contact using the above sensor. The device is prone to failure.

Further, a contact prevention device for fixing a rubber-based shock absorber to the side of the heavy equipment is also known.
Japanese Patent No. 3759 discloses a safety revolving bumper in which a pipe-shaped bumper having a radius extending from the revolving center of an upper revolving body such as a power shovel to a counterweight extends along the counterweight. However, even though these shock absorbers and swivel bumpers can reduce the impact of workers when they come into contact with heavy equipment, they do not prevent workers from being caught between heavy equipment and structures. Can not.

[0009]

SUMMARY OF THE INVENTION The present invention provides a contact prevention device for a turning heavy machine which is effective for an accident in which an operator is caught between a heavy machine and a structure, has a simple structure, and has few failures. It is an object of the invention to solve the problem.

[0010]

According to the present invention, there is provided a contact prevention device for a rotating heavy machine according to the present invention, wherein an outer peripheral portion of an upper rotating body constituting the rotating heavy machine has an evacuation distance for an operator from an outer peripheral portion serving as a blind spot of an operator. And a flexible body protruding in a substantially horizontal direction.

[0011] It is preferable that the flexible body is detachably attached to an outer peripheral portion of the upper rotating body by a magnet or a suction cup. The flexible body is preferably made of synthetic fiber cilia.

The flexible body includes a bar made of a foamed resin, which is spaced apart along an outer peripheral portion of the upper revolving body, and a bar supported at a distal end portion and a base end portion of which is formed on an outer peripheral portion of the upper revolving body. And a coil spring detachably attached to the coil spring.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a heavy duty swivel machine 10 equipped with a contact prevention device 20 according to the present invention, and FIG. 2 is a plan view thereof. In FIG. 1, a backhoe including a lower traveling body 11, an upper revolving superstructure 12, a shovel 13, and the like is shown as a revolving heavy equipment 10, but in the present invention, other than the above,
It is also applicable to heavy slewing machines such as cranes and breakers.
Reference numeral 15 denotes a driver's seat of the operator. Contact prevention device 2
Numerals 0 are provided on the outer peripheral portion of the upper revolving superstructure 12, especially on the rear portion (counter weight 16) and the left and right sides which are blind spots of the operator.

As shown in FIG. 2, in the contact prevention device 20 of the present embodiment, the bar 22 made of foamed resin is
Are arranged in a substantially circumferential shape along the outer peripheral portion of the device and spaced apart from the outer peripheral portion. For example, when applied to a backhoe having a bucket capacity of 0.5 m ³ class, the turning diameter up to the counter weight 16 which is the maximum turning diameter R of the heavy equipment is about 2.5 m, and the retreat distance of the worker is 0.1 mm. A turning diameter of about 3.0 m including 5 m may be secured in all outer peripheral portions of the upper turning body 12 which is a blind spot of the operator. That is, by adjusting the distance L between the outer peripheral portion of the upper revolving unit 12 and the bar 22 within the blind spot range of the operator, it is possible to completely prevent the worker from entering the turning area of the heavy equipment.

In the present embodiment, the bar 22 is divided into three, and each bar has a length of about 4 m. Each bar 22 is detachably attached to the outer peripheral portion of the upper swing body 12 by four supports 30. It is preferable that a tiger-striped tape be wrapped around the bar 22 so as to stand out. Bar 22
Is preferably made of a foamed resin because of its predetermined strength and flexibility and light weight, but it may be made of a synthetic resin such as vinyl chloride. In addition to a bar shape, a plate shape or a pipe shape may be used.

FIG. 3 shows details of the support 30.
In FIG. 3A which is a plan view, a proximal end portion 33 of a coil spring 32 having a support portion 31 of the bar 22 at a distal end portion is bolted to a spring hinge 35 via a bracket 34 having a U-shaped cross section. The spring hinge 35 is bolted to the base 36. The resilient force of the coil spring 32 is of a degree that gives the configured contact prevention device 20 an appropriate degree of flexibility. Specifically, the bar 22 can be supported horizontally, and the contact prevention device 20 can be supported.
It is necessary to prevent damage to workers and structures that come into contact with the vehicle.

The spring hinge 35 has shaft portions 37, 37.
, A spring (not shown) is built in, and the opened hinge 35 is automatically closed (returned to the original position). The spring hinge 35 shown in FIG.
The three plates constituting the hinge 35 are shaft portions 37, 37.
, The force from the shearing direction on the coil spring 32 can be absorbed by the opening and closing operation of the hinge 35, and the coil spring 32 connected to the hinge 35 can be protected. FIG. 4 shows an opening and closing operation of the spring hinge 35 when a shearing force acts on the coil spring 32. The opening / closing direction of the hinge 35 is not limited to the horizontal direction shown in FIG. 4, but may be the vertical direction.

As shown in the side view of FIG. 3B, the support portion 31 is of a fitting type so that the bar 22 can be easily attached and detached. The base 36 may be made of rubber and attached to the outer peripheral portion of the upper revolving unit 12 by a suction cup, or may be attached to the outer peripheral portion of the upper revolving unit 12 by a magnet.

In the above embodiment, the bar 22 made of foamed resin is used.
The contact preventing device 20 is constituted by a flexible body 40 that supports the coil spring 32. Therefore, by attaching the contact prevention device 20 before the operation of the swing heavy machine 10, an intrusion prohibited area is formed on the outer peripheral portion of the upper swing body 12. When the upper swing body 12 turns and approaches the worker, the bar 22 first approaches the worker, so that the worker can sense the approach of the upper swing body 12 and avoid it. it can.

Even when the worker does not sense the approach of the bar 22 due to carelessness or the like, the bar 22 first contacts the body of the worker and drives the worker out of the danger area. There is no contact with the upper swing body 12.
That is, according to the present invention, the worker does not enter the dangerous area around the upper swing body 12.

The contact prevention device 20 comprising the flexible body 40
Does not hurt the worker even if it comes into contact with the worker, and the flexible body 40 functions as a cushioning material even if it comes into contact with the surrounding structures.
2 and the structure are not damaged.

Next, another preferred embodiment according to the present invention will be described. FIG. 5A is a side view of the swing heavy equipment 10 to which the contact prevention device 20 is attached. In the same figure, the same members as those in FIG.

A contact prevention device 20 made of a flexible body 40 is mounted on the outer peripheral surfaces of the rear portion and the left and right side portions of the upper swing body 12. As shown in FIG. 5 (b) in an enlarged manner, the flexible body 40 is composed of countless cilia 41 made of synthetic fibers.
The length of 1 may be a length that allows a retreat distance for the worker to be secured. As shown, a protection ball 41a may be provided at the tip of the cilia 41 for the purpose of protecting workers.

Next, referring to FIG.
Modifications will be described.

The flexible body 40 shown in FIG. 6A is obtained by joining bases 36 and 36 to both ends of a flexible strip 42 with pins, and the bases 36 and 36 are connected to the outer periphery of the upper rotating body 12. Use by attaching to the surface. The flexible body 40 shown in FIG. 6B has a base end of a flexible strip 42 joined to the base 36 with a pin and a free end protruding in the horizontal direction.

The flexible body 40 shown in FIGS.
Cone 43 and bar 4 made of flexible material on base 36
4. The ball 45 is fixed.

The flexible body 40 shown in FIGS. 6 (f) and 6 (g)
This is a modification of the flexible body 40 shown in FIG. 6A, in which the distance L from the outer periphery of the upper swing body 12 can be adjusted.

[0029]

According to the first aspect of the present invention, an intrusion-inhibited area is formed on the outer peripheral portion of the turning heavy machine, thereby preventing an accident in which the worker is caught between the heavy machine and the structure. can do. Further, since no sensor or the like is used, the structure is simple, there is no failure, and the operation is reliable. Further, an optimum separation distance L can be set for heavy machines having various shapes.

According to the second aspect of the present invention, the mobility of the turning heavy machine for traveling and work is not hindered.

According to the third aspect of the present invention, since the structure is extremely simple, it is inexpensive and requires no maintenance.

According to the fourth aspect of the invention, in addition to enjoying the effects of the first aspect of the invention, the flexibility and impact resistance are particularly excellent, and the durability and operation reliability are high.

[Brief description of the drawings]

FIG. 1 is a perspective view of a swing heavy machine equipped with a contact prevention device according to the present invention.

FIG. 2 is a plan view of the swing heavy machine to which the contact prevention device shown in FIG. 1 is attached.

FIG. 3A is a plan view of a support 30,
FIG. 3B is a side view of the tip.

FIG. 4 is an explanatory view showing an opening and closing operation of a spring hinge when a shearing force acts on a coil spring.

5A and 5B show another embodiment of the contact prevention device according to the present invention. FIG. 5A is a side view of a swing heavy machine to which the device is attached, and FIG. It is an enlarged side view of the body 40.

FIG. 6 is a perspective view showing a modification of the flexible body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Revolving heavy machine 12 Upper revolving body 20 Contact prevention device 22 Bar made of foam resin 30 Support 32 Coil spring 35 Spring hinge 40 Flexible body 41 Synthetic fiber cilia

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Makoto Goto 2-1, Tsukudo-cho, Shinjuku-ku, Tokyo Kumagaya Gumi Tokyo head office

Claims (4)

[Claims] A flexible body is protruded in a substantially horizontal direction by an evacuation distance for an operator from an outer peripheral portion, which is a blind spot of an operator, on an outer peripheral portion of an upper revolving superstructure constituting a revolving heavy machine. Contact prevention device for heavy turning machines. 2. The contact prevention device according to claim 1, wherein the flexible body is detachable from an outer peripheral portion of the upper swing body. 3. The contact prevention device according to claim 1, wherein the flexible body is made of synthetic fiber cilia. 4. A bar made of a foamed resin, wherein the flexible body is spaced apart along an outer peripheral portion of the upper revolving body, and a bar supporting the bar at a distal end portion and a base end portion of the upper revolving body. 2. The contact prevention device according to claim 1, further comprising a coil spring detachably attached to an outer peripheral portion.