JP3669535B2 - Contact prevention device for swivel heavy machinery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device for preventing a contact accident between a rear counterweight and a worker of a swivel heavy machine.
[0002]
[Prior art]
Operators of swiveling heavy equipment such as backhoes cannot see the lower part of the counter-counterweight, and the swiveling heavy equipment is usually not equipped with a contact prevention device. Accidents may occur that come into contact with or between the heavy machinery and the structure.
[0003]
For this reason, in the past, barricades, color cones, ropes, single pipes, etc. have been installed around the heavy machinery to prevent people from entering the swivel area. Since it must be installed, there is a problem that the work becomes complicated and the installation tends to be neglected.
On the other hand, in order to avoid the troublesome work of installing the barricade, it is also known to provide the following sensors or the like in the swivel heavy machine.
[0004]
(1) A device that detects an approach using radio waves and magnetic fields.
Install a transmitter and receiver for radio waves or magnetic fields in heavy equipment, and detect when an operator carries a responder or starter and enters a reception area within a certain distance. An operator needs to carry the device, and the operating distance is uncertain due to the large influence of environmental conditions.
[0005]
(2) Using an ultrasonic wave or photoelectric switch.
Install ultrasonic or photoelectric sensors on heavy machinery to detect approaching obstacles. In many cases, the operating distance is uncertain due to environmental conditions and the distance cannot be adjusted.
[0006]
(3) Those that use ITV for monitoring.
Although the camera is installed on the heavy equipment and the rear and side are monitored by the driver's seat monitor, there is a risk that the operator may overlook it.
[0007]
Swivel heavy equipment is used in harsh weather and rainy weather, used in close proximity to structures, and the effects of vibration and shock that occur with use are severe. It is easy to cause.
[0008]
Further, a contact prevention device for fixing a rubber-based shock absorber to the side surface of a heavy machine is also known. For example, Japanese Utility Model Publication No. 4-33759 discloses a length from a turning center of an upper turning body such as a power shovel to a counterweight. A safety turning bumper is disclosed in which a pipe-like bumper having a radius of is extended along the counterweight.
However, even though these shock absorbers and swivel bumpers can mitigate the impact when the worker touches the swivel heavy machinery, they do not prevent accidents where the worker is caught between the heavy machinery and the structure. Can not.
[0009]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a contact prevention device for a swivel heavy machine that is effective for an accident in which an operator is caught between a heavy machine and a structure, and that has a simple structure and has few failures. Is.
[0010]
[Means for Solving the Problems]
The contact preventive device for a swivel heavy machine according to the present invention projects a flexible body in a substantially horizontal direction at an outer periphery of an upper swivel constituting the swivel heavy machine by an evacuation distance for an operator from the outer periphery that becomes a blind spot of an operator. It is characterized by having set up.
[0011]
It is preferable that the flexible body is detachably attached to the outer periphery of the upper swing body by a magnet or a sucker.
The flexible body is preferably made of synthetic fiber cilia.
[0012]
The flexible body includes a foamed resin bar that is spaced apart along the outer periphery of the upper swing body, and supports the bar at the distal end, and the base end is detachable from the outer periphery of the upper swing body. It is preferable that it consists of a coil spring attached to.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0014]
FIG. 1 is a perspective view of a swiveling heavy machine 10 to which a contact prevention device 20 according to the present invention is attached, and FIG. 2 is a plan view thereof. In FIG. 1, a backhoe comprising a lower traveling body 11, an upper turning body 12, an excavator 13, and the like is shown as a turning heavy machine 10, but in the present invention, it can also be applied to a turning heavy machine such as a crane and a breaker. It is. Reference numeral 15 denotes an operator's driver's seat.
The contact prevention device 20 is mounted on the outer periphery of the upper swing body 12, particularly on the rear portion (counter weight 16) that becomes the blind spot of the operator and on both the left and right sides.
[0015]
As shown in FIG. 2, in the contact prevention device 20 of the present embodiment, the foamed resin bar 22 is disposed substantially circumferentially along the outer periphery of the upper swing body 12 and spaced from the outer periphery. For example, when applied to a backhoe having a bucket capacity of 0.5 m ³ class, the turning diameter to the counterweight 16 that is the maximum turning diameter R of the heavy machinery is about 2.5 m. What is necessary is just to ensure about 3.0 m of turning diameters which added 5 m in all the outer peripheral parts of the upper turning body 12 used as a blind spot of an operator. That is, by adjusting the separation distance L between the outer periphery of the upper swing body 12 and the bar 22 within the blind spot range of the operator, it is possible to completely prevent an operator from entering the swing area of the heavy machinery.
[0016]
In the present embodiment, the bar 22 is divided into three, and the length of one bar is about 4 m. Each bar 22 is detachably attached to the outer periphery of the upper swing body 12 by four supports 30. The bar 22 is preferably wrapped with a tiger stripe tape so as to stand out. The bar 22 has predetermined strength and flexibility and is preferably made of foamed resin from the viewpoint of light weight, but may be made of synthetic resin such as vinyl chloride. In addition to the bar shape, a plate shape or a pipe shape may be used.
[0017]
FIG. 3 shows details of the support 30. In FIG. 3A, which is a plan view, the proximal end portion 33 of the coil spring 32 having the support portion 31 of the bar 22 at the distal end portion has a U-shaped cross section. It is bolted to a spring hinge 35 via a bracket 34, and this spring hinge 35 is bolted to a base 36. The elastic force of the coil spring 32 is such that it provides moderate flexibility to the configured contact prevention device 20. Specifically, the bar 22 can be supported horizontally and the contact prevention device 20. It is necessary to prevent damage to workers and structures that have come into contact.
[0018]
The spring hinge 35 incorporates a spring (not shown) in the shaft portions 37 and 37, and the opened hinge 35 is automatically closed (returns to the original position). In the spring hinge 35 shown in FIG. 3A, the three plates constituting the hinge 35 are alternately bent at the shaft portions 37, 37. It can be absorbed by the opening and closing operation, and the coil spring 32 connected to the hinge 35 can be protected. FIG. 4 shows an opening / closing operation of the spring hinge 35 when a shearing force is applied to the coil spring 32. The opening / closing direction of the hinge 35 is not limited to the horizontal direction shown in FIG. 4 and may be a vertical direction.
[0019]
As shown in the side view of FIG. 3B, the support portion 31 is a fitting type, and makes it easy to attach and detach the bar 22. Further, the base 36 may be made of rubber, and may be attached to the outer periphery of the upper swing body 12 with a suction cup, or may be attached to the outer periphery of the upper swing body 12 with a magnet.
[0020]
In the above embodiment, the contact preventing device 20 is configured by the flexible body 40 in which the foamed resin bar 22 is supported by the coil spring 32. Therefore, by attaching the contact prevention device 20 before the operation of the swivel heavy machine 10, an intrusion prohibited area is formed on the outer periphery of the upper swivel 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 this. it can.
[0021]
Even when the worker does not sense the approach of the bar 22 due to carelessness, the bar 22 first contacts the worker's body and drives the worker out of the danger zone. 12 is not touched.
That is, according to the present invention, the worker does not enter the dangerous area around the upper swing body 12.
[0022]
The contact preventing device 20 made of the flexible body 40 does not damage 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 surrounding structures. Neither the upper swing body 12 nor the structure is damaged.
[0023]
Next, another preferred embodiment according to the present invention will be described. FIG. 5A is a side view of the swivel heavy machine 10 to which the contact prevention device 20 is attached. In FIG. 5, the same members as those in FIG.
[0024]
On the outer peripheral surfaces of the rear part and the left and right side parts of the upper swing body 12, a contact preventing device 20 made of a flexible body 40 is provided. As shown in an enlarged view in FIG. 5B, the flexible body 40 is composed of innumerable cilia 41 made of synthetic fibers, and the length of the cilia 41 is a length that can secure a retreat distance for an operator. Good. In addition, as shown in the figure, a protective ball 41a may be provided at the tip of the cilia 41 for the purpose of protecting the worker.
[0025]
Next, a modification of the flexible body 40 will be described with reference to FIG.
[0026]
A flexible body 40 shown in FIG. 6A is obtained by pin-bonding bases 36 and 36 to both ends of a flexible strip 42, and the bases 36 and 36 are attached to the outer peripheral surface of the upper swing body 12. To use.
In addition, the flexible body 40 shown in FIG. 6B is obtained by pin-joining a base end portion of a flexible strip 42 to a base 36 and projecting a free end portion in a horizontal direction.
[0027]
A flexible body 40 shown in FIGS. 6C to 6E is obtained by fixing a cone 43, a bar 44, and a ball 45 made of a flexible material on a base 36.
[0028]
A flexible body 40 shown in FIGS. 6 (f) and 6 (g) is a modification of the flexible body 40 shown in FIG. 6 (a), and the distance L from the outer periphery of the upper swing body 12 can be adjusted. It is.
[0029]
【The invention's effect】
According to the first or second aspect of the present invention, since the intrusion prohibited area for the worker is formed in the outer peripheral portion of the swiveling heavy machine, it is possible to prevent an accident in which the worker is caught between the heavy machine and the structure. it can. Moreover, since no sensor or the like is used, the structure is simple, there is no failure, and the operation is reliable. Furthermore, an optimum separation distance L can be set for heavy machines of various shapes. In addition, the mobility of the swiveling heavy machine with respect to traveling and work is not hindered. The flexible body is particularly excellent in flexibility and impact resistance, and has high durability and operational reliability.
[0031]
According to the invention described in claim 3, since the structure is extremely simple, it is inexpensive and does not require maintenance.
[Brief description of the drawings]
FIG. 1 is a perspective view of a swivel heavy machine equipped with a contact prevention device according to the present invention.
FIG. 2 is a plan view of a swivel heavy machine to which the contact prevention device shown in FIG. 1 is attached.
FIG. 3 (a) is a plan view of the support 30, and FIG. 3 (b) is a side view of the tip portion thereof.
4 is an explanatory view showing an opening / closing operation of a spring hinge 35 when a shearing force is applied to the coil spring 32. FIG.
FIG. 5 shows another embodiment of the contact prevention device according to the present invention. FIG. 5 (a) is a side view of a swiveling heavy machine to which the device is attached, and FIG. 3 is an enlarged side view of a body 40. FIG.
FIG. 6 is a perspective view showing a modification of the flexible body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Turning heavy machine 12 Upper turning body 20 Contact prevention apparatus 22 Foamed resin bar 30 Support 32 Coil spring 35 Spring hinge 40 Flexible body 41 Cilia of synthetic fiber

Claims (3)

A contact prevention device having a flexible body projecting in a substantially horizontal direction at an outer peripheral portion of an upper revolving structure constituting a swivel heavy machine for a retreat distance for an operator from an outer peripheral portion serving as a blind spot of an operator. A body made of foamed resin that is spaced apart along the outer periphery of the upper swing body, and a support that is detachably attached to the outer periphery of the upper swing body and supports the bar, A contact prevention device for a swirling heavy machine , wherein the support is composed of a coil spring that supports the bar at a distal end portion, and a spring hinge in which a proximal end portion of the coil spring is connected via a bracket having a U-shaped cross section . The contact prevention device according to claim 1, wherein the spring hinge is formed by alternately bending three plates through a shaft portion . An apparatus for preventing contact with a swiveling heavy machine, in which a flexible body protrudes in a substantially horizontal direction from the outer circumferential part, which is a blind spot of an operator, by a retreat distance for an operator at an outer circumferential part of an upper swivel constituting the swirling heavy machine. The contact prevention apparatus which consists of cilia made from synthetic fiber in which the said flexible body formed the protection ball | bowl at the front-end | tip part .

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