JPH0735999B2 - Inspection device for fall arrester for work in high places - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection device for inspecting a lifeline of a fall arrester for work in high places for breakage of wires.

[0002]

2. Description of the Related Art When a worker who works at a high place hits a foot and crashes, the crash for aerial work that prevents the fall and protects the human life of the worker. A lot of preventive devices are used.

Generally, this fall arrester for work at high places suspends and fixes the main body at a predetermined position, pulls out a lifeline, and connects an attaching tool at the tip to a retaining ring of a belt of an operator for work.
In the unlikely event that a worker falls, the locking mechanism will operate to prevent the worker from crashing into the ground. To prevent work-related accidents, the worker can visually check the lifeline for wire breakage, kinks, wear, and deformation. Had to be inspected by.

It is also necessary to confirm that the lifeline is reliably locked when the lifeline is pulled out at a speed higher than a predetermined speed or abruptly. Recently, work at high places has been increased with the rise of the city, and Along with this, there is a growing demand for fall arresters for work in high places, so the rental business of fall arresters by manufacturers and trading companies is expanding, and the work of always checking the safety before lending a fall arrester is also increasing.

Since this safety confirmation work requires checking over the entire length of the lifeline, it is a troublesome work which requires a place and is troublesome.

The present invention solves the above-mentioned problems and provides an inspection device for a fall arrester for aerial work which is capable of efficiently and reliably inspecting the wire breakage and performance of the lifeline of the fall arrester for aerial work. This is a technical issue.

[0007]

The gist of the present invention will be described with reference to the accompanying drawings.

The body 4 is provided with a mounting portion 3 for detachably mounting the fall arrester a in which the lifeline 2 is wound and housed.
In addition, a winding drum 5 for winding the lifeline 2 drawn out from the fall arrester a is rotatably provided, and a drive device 6 for rotationally driving the winding drum 5 is provided in the machine body 4, and the winding device 5 is rotated by the drive device 6. A high place characterized in that a detection mechanism 7 for detecting the end of winding the lifeline 2 around the take-up drum 5 is provided in the machine body 4, and a drum rotation control section 8 for controlling the rotation of the drive device 6 is provided in the machine body 4. The present invention relates to an inspection device for a work fall arrester.

[0009]

[Function] Attach the fall arrester a to the mounting portion 3 of the machine body 4,
The tip of the lifeline 2 pulled out from the fall arrester a is locked to the winding drum 5, and the drive device 6 is driven by the drum rotation control unit 8.
The winding drum 5 is rotated by controlling the rotation speed of the above, and while the lifeline 2 is wound around the winding drum 5, the lifeline 2 is visually inspected for broken wires, kinks, wear states, and deformation.

Further, the rotation of the winding drum 5 is sometimes stopped, the lifeline 2 is grasped by hand, and the lifeline 2 is suddenly pulled out to check whether the locking mechanism of the fall arrester a surely locks the lifeline 2.

When the winding of the lifeline 2 on the winding drum 5 is completed, the detection mechanism 7 stops the winding drum 5 via the drum rotation control unit 8, and the drive unit 6 is reversed by the command of the drum rotation control unit 8. , The lifeline 2 is wound up and stored in the fall arrester a.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an automatic wind-up type fall arrester inspection apparatus equipped with a fall prevention lock mechanism according to a preferred embodiment of the present invention.

Bearing portions 9 and 9 are provided in front of and behind the upper portion of the machine body 4, and a main shaft 10 is fitted into the bearing portions 9 and 9 to rotatably provide the main shaft 10 with respect to the machine body 4. On arm rod 11
Is fixed to the base and the tip thereof is provided on the left side, and an L-shaped locking rod 12 capable of detachably locking the hanging portion of the fall arrester a is provided at this tip.

The base of the balance rod 13 is fixed to the center of the main shaft 10 and its tip is projected rightward. The balance pin 14 is inserted into this projecting end and the elastic ridges 15 are attached to the left and right ends thereof.・ The upper end locking part of 15 is fixedly locked and the other end is hung down, the top ring part of the eyebolt 16 ・ 16 is fixed to this lower end locking part, and the lower end of the eyebolt 16 ・ 16 is fixed to the machine body 4. Insert it into the locking hole of the bracket 29 provided on the
Entrainment tension when the lifeline 2 of the fall arrester a, which is screwed with the adjusting nuts 30 and 30 on the screw part at the lower end of the arm and is locked to the lock bar 12 at the left end of the arm rod 11, is wound around the winding drum 5. Adjust the balance.

A motor 17 is provided in the machine body 4, and the motor 17
The drive pulley 18 is fixedly attached to the output shaft of the, the bearings 20 and 20 are provided at the left and right ends of the substantially central portion of the machine body 4, and the drum shaft 19 is erected on the left and right bearings 20 and 20 to freely rotate the drum shaft 19. If you
A winding drum 5 for winding the lifeline 2 on the left end of the drum shaft 19.
And a storage portion 21 for storing the mounting hook 1 attached to the tip of the lifeline 2 on the winding drum portion 5 ′ of the winding drum 5,
The driven pulley is attached to the drum shaft 19 facing the drive pulley 18.
23 is fastened to the drive pulley 18 and driven pulley 23.
Suspend 22.

A drum rotation control unit for controlling the rotation speed of the motor 17 by means of, for example, an inverter in the machine body 4, controlling the rotation speed of the winding drum 5 by a stepless speed reduction mechanism, and switching the rotation direction between forward and reverse. 8 is installed, the machine body 4
When the lifeline 2 is wound around the winding drum 5 or when the lifeline 2 is rewound from the winding drum 5 to the fall arrester a, the sensor 24 detects it at the lower end near the base of the balance rod 13. It is provided so that the parts abut.

Since the present embodiment is constructed as described above, the hanging portion of the fall arrester a is hung on the connecting rod 12 of the arm rod 11, the lifeline 2 is pulled out from the fall arrester a, and the attachment hook at the tip thereof is attached. 1 is stored in the storage portion 21 of the winding drum 5, and the drum rotation control unit 8 adjusts the rotation speed of the winding drum 5 to wind the lifeline 2 around the winding drum 5 and visually cut the strands of the lifeline 2. Inspects for kinks, wear, and deformation.

At this time, the elastic nut 15 is rotated by rotating the adjusting nut 30 so that the tension of the elastic elastic member 15 attached to the right end of the balance rod 13 balances with the winding tension of the lifeline 2 of the winding drum 5. The lifeline 2 stored in the fall arrester a is wound around the winding drum 5 by adjusting the tension.

Further, sometimes the rotation of the winding drum 5 is stopped and the lifeline 2 is grasped and pulled out by hand to check whether the locking mechanism (not shown) of the fall arrester a surely locks the lifeline 2.

When the lifeline 2 wound in the fall arrester a is taken up by the take-up drum 5 and rewinding is completed,
The winding force of the winding drum 5 overcomes the balance tension of the elastic elastic body 15, the arm rod 11 rotates downward about the main shaft 10, the balance rod 13 rotates upward, and the detecting portion of the sensor 24 operates. Move away from the contact part of the balance rod 13
The rotation of 17 is stopped, and then the motor 17 is reversely rotated by the command of the drum rotation control unit 8 so that the lifeline 2 wound around the winding drum 5 by the automatic winding force of the fall arrester a enters the fall arrester a. Since it is wound and stored, the mounting hook 1 is taken out from the storage portion 21 of the winding drum 5.

Further, the rotation of the take-up drum 5 is changed by the switch 31 to forward / reverse rotation, the foot switch 32 is used to make forward / reverse inching movement, "forward / reverse", "forward / reverse" ...・ Provide 3 steps of continuous rotation for convenient inspection work.

Further, the motor 17 is rotated in the reverse direction so that the fall arrester a
When the rewinding of the lifeline 2 into the fall arrester a is completed by the automatic winding force of the, the lifeline 2 moves from the front end portion of the winding drum portion 5'of the winding drum 5 to the upper portion of the winding drum portion 5 '. An optical sensor is provided to detect that the motor 17 is stopped by this sensor, or an optical sensor is provided below the take-up drum 5 to detect that the lifeline 2 is randomly wound and hangs down. It may be provided to prevent trouble.

In the figure, reference numeral 25 is a power switch, 26 is a speed adjusting knob for adjusting the rotation of the winding drum 5, and 27 is a wheel.

[0024]

Since the present invention is configured as described above, the fall arrester is attached to the mounting portion provided on the machine body, and the tip of the lifeline pulled out from the fall arrester is accommodated in the accommodating portion of the winding drum. The rotation control unit adjusts the rotation of the winding drum to wind up the lifeline, and it is possible to visually inspect the lifeline strand breaks and the operation of the lock mechanism efficiently, and practical and space-saving excellent fall prevention It becomes an inspection device for vessels.

[Brief description of drawings]

FIG. 1 is a front view in which a part of the present embodiment is cut away.

FIG. 2 is a side view in which a part of the present embodiment is cut away.

[Explanation of symbols]

 2 Lifeline 3 Mounting part 4 Airframe 5 Winding drum 6 Drive device 7 Detection mechanism 8 Drum rotation control part

Claims (1)

[Claims] 1. A mounting portion for removably attaching a fall arrester containing a lifeline wound therein is provided on the machine body, and a winding drum for winding up the lifeline pulled out from the fall arrester is rotatably provided on the machine body. The machine is equipped with a drive device that drives the take-up drum to rotate, and the machine is equipped with a detection mechanism that detects the end of winding the lifeline on the take-up drum that is rotated by the drive device. An inspection device for a fall arrester for work in high places, characterized by having a control unit on the machine body.