JPH10226474A - Wire rope inspection method and inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inspect a wire rope reliably and easily with the use of a camera. SOLUTION: A frame 12 is attached to a hoisting wire 24 to be inspected. While the frame 12 is lifted or lowered at a substantially constant speed with a guide rope 48 along the hoisting wire 24, a video camera 14 fixed in the frame 12 is started. After the shoot of the wire hoisting 24, the video camera 14 is recovered and a tape is played back to inspect the wire 24 on the images.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting a wire rope used for an elevator or a crane, and an inspection apparatus used for the method.

[0002]

2. Description of the Related Art Generally, elevators and cranes are designed to suspend a passenger basket or luggage by wire ropes and to move up and down. The wire rope is wound around a drum or a winch to be wound or fed, and a large load is supported. Therefore, it is necessary to inspect and maintain the wire rope at predetermined intervals for safety measures.

Therefore, when inspecting the above-mentioned wire rope, conventionally, a worker rides on a cargo elevator, a gondola, or the like, and visually inspects the wire rope.

[0004]

However, in such a conventional inspection method of a wire rope, as described above, since a worker using a cargo elevator or a gondola is visually inspected, the wire rope to be inspected is used. The wire rope becomes blind spot due to a structure or the like on the near side, and it is not possible to perform an accurate and accurate inspection. As described above, if the inspection is uncertain, there is a problem that a wire rope flaw may be overlooked, and as a result, an unexpected accident may occur due to cutting.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a wire rope inspection method and an inspection apparatus capable of securely, easily and safely inspecting a wire rope using a camera. And

[0006]

In order to achieve the above object, according to a first aspect of the present invention, there is provided a method for inspecting a wire rope, comprising: disposing an inspection camera at a constant distance from a wire rope to be inspected; While continuously moving the inspection camera along the wire rope, the wire rope is photographed, and the wire rope is inspected from the photographed result.

According to a second aspect of the present invention, there is provided a wire rope inspection apparatus for maintaining an interval between a frame for fixing an inspection camera and the wire rope to be inspected. It is constituted by providing an arm and a pulling rope for moving the frame along the wire rope.

In the wire rope inspection method according to the first aspect of the present invention, the inspection camera is kept at a fixed distance from the wire rope so that the camera focuses on the wire rope. Move along. Then, the entire length of the wire rope can be uniformly photographed by the inspection camera, and the wire rope can be inspected accurately and accurately from the photographed result, and further, it is not necessary for the operator to directly inspect the wire rope. , Can significantly improve safety.

In the inspection apparatus for a wire rope according to the second aspect, the inspection camera fixed to the frame body can keep the distance between the wire rope and the wire constant by the distance holding arm.
The state where the focus of the inspection camera is matched with the wire rope can be maintained. Then, by moving the frame along the wire rope by the tow rope, it is possible to uniformly photograph the entire length of the wire rope by the inspection camera.

[0010]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 4 show an embodiment of a wire rope inspection method and an inspection apparatus according to the present invention. FIG. 1 is a front view of the inspection apparatus, FIG. 2 is a side view of the inspection apparatus, and FIG. FIG. 4 is a schematic configuration diagram of a construction elevator using the inspection device.

That is, as shown in FIGS. 1 to 3, the wire rope inspection apparatus 10 of the present embodiment includes a frame 12, and a video camera 14 as an inspection camera fixed to the frame 12. The inspection apparatus 10 is used for inspection of a construction elevator 16 shown in FIG.

The construction elevator 16 is configured as a temporary elevator, and the temporary columns 18 and the like are extended upward as the construction of a building frame (not shown) is progressed. A pair of fixed sheaves 20,20 and a pair of guide sheaves 22,22 are attached to the top 18a of the temporary support 18, and the fixed sheaves 20,20 have lifting wires 24.
Is circulated, and a guide wire 26 is circulated around the guide sheaves 22 and 22. The lifting wire 24 is circulated around the movable sheave 28 between the fixed sheaves 20, 20.
An occupant basket 30 is suspended from the movable sheave 28.

One end of the lifting wire 24 is wound around a lifting winch 32 and the guide wire 2
One end of 6 is wound around a guide winch 34. On the other hand, the lifting wire 24 and the guide wire 2
6 is fixed to the ground G side. Then, the elevating winch 32 is driven to move the elevating wire 2
4 by rewinding and rewinding the crew basket 3
0 is raised and lowered while being guided by the guide wire 26. In addition, the guide winch 34 is provided with the guide wire 26 as the temporary support column 18 is extended upward.
Is to be sent out. At this time, the guide wire 26 is constantly adjusted to a tensioned state.

The elevating wire 24 and the guide wire 26 are formed by wire ropes.
Are inspected by the inspection apparatus 10.

Although the inspection apparatus 10 has been described as being provided with the frame 12 and the video camera 14, the frame 12 has a predetermined length L that can accommodate the video camera 14.
The four angle members 36, 36a, 36 cut into 1
b and 36c are arranged corresponding to the respective corners of the rectangular shape as shown in FIG. 2, and a pair of angle members 36, 36a and 36b, 36c arranged above and below are respectively connected to the upper and lower parts. A pair of angle members 36, 36c and 36 are welded through the plates 38, 38a and arranged on the left and right.
b and 36c are connected to the strips 40 and 4 respectively.
0a is welded.

The spacing arms 42, 42a are welded to the upper and lower plates 38, 38a, respectively. The distal ends of the spacing arms 42, 42a protrude from the upper and lower plates 38, 38a by a predetermined distance S, and the distal ends are provided with wire rope insertion portions 44, respectively. These insertion portions 44
As shown in FIG. 3, each of the brackets is constituted by a pair of semicircular brackets 44a and 44b each having a flange portion, and the flange portions are detachably connected and fixed by bolts and nuts (not shown). These semicircular brackets 44a and 44b are combined to form a wire guide hole 44c,
The wire guide hole 44c is formed to have a slightly larger diameter than the wire rope inserted therethrough so that it can freely move relative to the wire rope.

A support bracket 46 is erected from the base end of the upper interval holding arm 42 in the frame 12 and a tow rope 48 is inserted into a mounting hole 46a formed in the support bracket 46.
Can be attached. The tow rope 48 is used to move the frame 12, and the tow rope 4
8 may be pulled manually by an operator or may be pulled by winding a winch.

A video camera 14 is disposed in the frame 12 as shown by phantom lines in FIGS. 1 and 2 and is located inside the angle members 36, 36a, 36b, and 36c. The camera 14 is fixed to the frame 12 by a rubber band or the like (not shown). The spacing arms 42, 42a are set so that the focal length of the video camera 14 matches the wire rope to be checked.

In the inspection method using the inspection device 10 having the above-described configuration, the frame 12 is attached to a wire rope to be inspected, for example, a lifting wire 24 as shown in FIG. The attachment of the frame 12 is performed by the spacing arms 42, 42.
The elevating wire 24 is inserted through the insertion portion 44a, and the frame 12 is suspended by the tow rope 48 attached to the support bracket 46. In this state, the video camera 14 fixed to the frame 12 is operated to pull the frame 12
By moving at a substantially constant speed from below to above or from above to below the lifting wire 24 while towing,
The video camera 14 continuously photographs the lifting wire 24.

Then, after the photographing of the lifting wire 24 is completed, the video camera 14 is taken in to reproduce the photographed tape, and the lifting wire 24 is inspected from the reproduced contents. Of course, in the construction elevator 16, the wire rope to be inspected is not limited to the elevating wire 24, and the guide wire 26 can be inspected by using the inspection device 10.

Therefore, according to the wire rope inspection method of the present embodiment, the frame 12 to which the video camera 14 is fixed is
Moved along the wire rope to be inspected, the video camera 14 shoots the wire rope, and then reproduces and inspects the wire rope. The entire length of the wire rope can be shot evenly. Therefore,
From the photographed result, the entire length of the wire rope can be inspected accurately and accurately. Therefore, the damaged portion of the wire rope can be found accurately, the damaged portion can be repaired or replaced promptly, and the safety of the elevator 16 can be ensured. Further, in the present embodiment, the inspection method of the wire rope is performed using the inspection device 10. The inspection device 10 is connected to the wire rope by the interval holding arms 42 and 42 a protruding from the frame 12. Can be kept constant, so that the focus of the video camera 14 can be kept coincident with the wire rope. Therefore, the wire rope to be inspected can be clearly photographed over the entire length. Then, the frame 12 is moved along the wire rope by the pulling rope 48, so that the video camera 14 can uniformly photograph the wire rope over the entire length.

Further, since the result of the photographing by the video camera 14 can be repeatedly reproduced, the damaged portion can be sufficiently examined and the photographed result can be recorded.

In the above embodiment, the case where the lifting wire 24 and the guide wire 26 of the construction elevator 16 are inspected by the inspection device 10 is disclosed. However, the invention is not limited to this. For example, as shown in FIG. 5, the present invention can be applied to a wire rope 54 of a crane 52 that transports a material 50 to a position separated by a predetermined distance.

That is, the wire rope 54 is tensioned between the two supports 56 and 56a in a substantially horizontal state, and the frame 12 of the inspection device 10 is set on the wire rope 54,
Then, the video camera 14 fixed to the frame body 12 can be moved and the wire rope 54 can be photographed by pulling the frame body 12 with the tow rope 48.
In this case, since the wire rope 54 is loosened due to its own weight, another traction rope 48a is provided on the opposite side to the traction rope 48, and the movement is regulated by one traction rope 48a. It is desirable to keep the moving speed of the inspection device 10 constant by pulling with the other tow rope 48.

In each of the embodiments described above, the case where the video camera 14 is used as the inspection camera is disclosed. However, the invention is not limited to this, and a film-type movie camera may be used as the inspection camera. A camera can also be used.

[0026]

As described above, in the method for inspecting a wire rope according to the first aspect of the present invention, the inspection camera is maintained at a fixed distance from the wire rope so that the camera focuses on the wire rope. Since the inspection camera is moved along the wire rope in this state, the entire length of the wire rope can be uniformly photographed by the inspection camera, and the wire rope can be inspected accurately and accurately from the photographed result. . Further, since it is not necessary to directly inspect the wire rope by an operator, safety can be significantly improved. Further, since the photographed result can be repeatedly examined, the inspection accuracy of the wire rope can be remarkably improved, and the photographed result can be recorded.

In the wire rope inspection device according to the second aspect of the present invention, since a space holding arm is provided on a frame for fixing the inspection camera, the space between the wire rope and the inspection device can be maintained constant. The state where the focus of the inspection camera is matched with the wire rope can be maintained. Then, by moving the frame along the wire rope by the tow rope, various excellent effects can be obtained in that the inspection camera can uniformly photograph the entire length of the wire rope.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an inspection device according to the present invention.

FIG. 2 is a side view showing an embodiment of the inspection device according to the present invention.

FIG. 3 is a plan view of a portion A in FIG. 2 of the inspection device according to the present invention.

FIG. 4 is a schematic configuration diagram of a construction elevator showing an inspection method using the inspection device according to the present invention.

FIG. 5 is a schematic configuration diagram of a crane showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Inspection apparatus 12 Frame 14 Video camera (Inspection camera) 24 Elevating wire (Wire rope) 26 Guide wire (Wire rope) 42, 42a Spacing arm 48, 48a Tow rope

Claims (2)

[Claims] 1. An inspection camera is arranged at a fixed distance from a wire rope to be inspected, and the inspection camera is continuously moved along the wire rope, and the wire rope is continuously photographed. A method for inspecting a wire rope, comprising inspecting the wire rope from above. 2. A frame for fixing an inspection camera, an interval holding arm for holding a predetermined interval between the frame and a wire rope to be inspected, and moving the frame along the wire rope. A wire rope inspection device comprising a tow rope.