JPH08215326A - Fall preventing device - Google Patents

Abstract

PURPOSE: To form a fall preventing device compactly and to improve operability by drawing out a lifeline to both sides of a take-up reel by engaging the center part of the lifeline with the core of the take-up reel and connecting one terminal of the lifeline to a high working site and the other terminal to a human body with hooks, respectively, then, locking the core in emergency. CONSTITUTION: The hook 12 is connected to the human body by engaging with the body belt of a worker. Thence, the hook 11 is hung on the tip of an expansion bar, which enables the hook 11 to be lifted by the expansion bar. After that, the lifeline 8 is supplied from the core 9 at both sides of the take-up reel 7 simultaneously, and the hook 11 is engaged with a telephone line, etc. Thence, the worker performs work on a utility pole. At this time, the core 9 winds up the lifeline 8 with the elastic energizing force of a spring 14, which eliminates the loosening of the lifeline 8. When the worker falls down, the lifeline 8 is supplied quickly, and the core 9 is rotated quickly. In such a way, an emergency lock mechanism 16 is operated, and the core 9 is locked, which supports the human body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall prevention device for preventing a worker at a work site at a high place such as a utility pole from falling.

[0002]

2. Description of the Related Art FIG. 12 shows a conventional fall prevention device. This is used for telephone construction to prevent the operator 2 of the utility pole 1 from falling, and has a master rope 3 having a length corresponding to the height of the utility pole 1. Further, since the hook 4 is provided at one end of the master rope 2, the hook 4 can be hooked on the tip of the telescopic rod on the ground, and the hook 4 can be lifted by the telescopic rod to be engaged with the telephone line 5. Therefore, when the rope chuck 6 is connected to the body of the worker 2 and the master rope 3 is passed through the rope chuck 6 and climbs to the telephone pole 1, when the worker 2 falls, the rope chuck 6 causes the master rope 3 to move. It is chucked and can support the body of the worker 2 by the telephone wire 5, the main rope 3 and the rope chuck 6, which is safe.

In the overhead line construction of a railway, the hook 4 can be engaged with the overhead line when climbing up to the utility pole, thereby preventing a worker from falling. Hook 4 to telephone line 5,
It may be engaged with a member other than the overhead wire.

However, in the case of this device, it is necessary to use a long rope as the master rope 3. For this reason, there is a problem that the master rope 3 is bulky and it is not easy to store and transport it.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems,
The purpose is to provide a compact and easy-to-use fall prevention device.

[0006]

According to the present invention, a take-up roll and a lifeline are used as a fall prevention device. The lifeline has a length corresponding to the height of the work site at height. The lifeline is engaged with the winding core of the take-up reel at the center position of the lifeline. Further, the lifeline is pulled out to both sides of the take-up reel, and a hook is provided at one end thereof, which engages with a member at the work site at a high place, and the other end of the lifeline is connected to the body of the worker. further,
A spring is provided on the take-up reel and acts on the winding core, and the winding core is elastically urged in the rotation direction, the life ropes on both sides of the winding reel are simultaneously wound around the winding core in the same direction, and the emergency locking mechanism is provided. The emergency lock mechanism provided on the take-up reel acts on the core when the worker falls, and the core is locked by centrifugal force.

[0007]

Description of Embodiments Embodiments of the present invention will be described below.
FIG. 1 shows an embodiment of the present invention. This is used for telephone construction or overhead line construction to prevent the operator 2 of the electric pole 1 from falling, and has a take-up reel 7 and a lifeline 8. The lifeline 8 has a length corresponding to the height of the utility pole 1. The lifeline 8 is composed of a fairly thin flat belt. For its configuration,
As described in Japanese Utility Model Publication No. 2-94569,
The outer cylinder bed cloth is woven with the wear-resistant rigid fiber threads, and a large number of threads made of high-strength rigid fiber such as aramid fiber are inserted into the outer cylinder bed cloth. Are arranged so as to extend in the length direction of the outer cover sheet, and are closely arranged in the width direction and the thickness direction of the outer cover sheet,
The core is composed of high-strength and rigid fiber threads. Therefore, the core body can be provided with great strength and can be protected by the outer tube covering, and there is no problem in strength even if the whole is considerably thin.

Further, as shown in FIG. 2, the take-up reel 7
An axial groove 10 is formed on the winding core 9, and the life rope 8 is inserted into the axial groove 10 and engaged with the winding core 9 at the center position of the life rope 8. Further, the lifeline 8 is pulled out to both sides of the take-up reel 7, a hook 11 is provided at one end thereof, and a hook 12 is provided at the other end thereof.
1、12, folded back from the hook 11,12,
Doubly overlaid and sewn with sutures. The hook 11 is for engaging with the telephone line 5. The hook 12 is for engaging with the trunk belt of the worker and connecting with the body. Further, in the vicinity of the hook 12, the lifeline 8 is bent on both sides thereof, folded back, double-lapped, and sewn with a sewing thread. The shock absorber 13 is configured by this, and when the body of the worker 2 is supported by the lifeline 8, the lifeline 8 is pulled by the impact load in the shock absorber 13 and the sewing thread is cut, whereby the impact load is absorbed. It

Further, a spring 14 is provided on the take-up reel 7 and accommodated in the cover 15 thereof. The spring 14 is a spring, the outer end of which is engaged with the cover 15, and the inner end of which is inserted into and engaged with the axial groove 10 of the winding core 9. Therefore, the spring 14 acts on the winding core 9, and the winding core 9 is elastically biased in the rotation direction. Therefore, as shown in FIG. 4, the lifeline 8 is simultaneously wound around the winding core 9 in the same direction on both sides of the winding reel 7.

Further, an emergency lock mechanism 16 is provided on the take-up reel 7. The emergency lock mechanism 16 has a ratchet wheel 17, a pawl 18 and a sensor 19. The ratchet wheel 17 and the sensor 19 are provided on the winding core 9 and rotate integrally with the winding core 9. Then, when the worker 2 crashes, the lifeline 8 is suddenly unwound, and when the core 9 is rapidly rotated, centrifugal force acts on the sensor 19 and the sensor 19 is displaced in the radial direction of the core 9. The tip is Paul 1.
Engage 8. As a result, the pawl 18 swings, the teeth of the ratchet wheel 17 engage with the pawl 18, the ratchet wheel 17 and the pawl 18 lock the winding core 9, and the winding core 9 does not rotate.

Therefore, in this apparatus, as shown in FIG. 5, the hook 12 is engaged with the trunk belt of the worker 2 and is connected to the body. After that, hook 1 to the end of the telescopic rod.
1 is hooked up and the hook 11 is lifted by the telescopic rod, the lifeline 8 on both sides of the take-up reel 7 is wound around the core 9.
Are unwound at the same time from. As described above, the length corresponds to the height of the utility pole 1. Therefore, the hook 11 can be engaged with the telephone line 5 or the overhead line.

Then, when the utility pole 1 is climbed in this state, the core 9 is elastically biased by the springs 14 and the lifeline 8 is wound on the core 9 in the same direction on both sides of the take-up reel 7. Taken. Therefore, the lifeline 8 between the telephone line 5 or the overhead line and the worker 2 does not relax.

When the worker falls, the lifeline 8 is suddenly unwound and the core 9 is rapidly rotated. The emergency locking mechanism 16 locks the core 9 and the core 9 does not rotate. Therefore, the body of the worker 2 can be supported by the telephone line 5 or the overhead line, the lifeline 8 and the take-up reel 7, which is safe. It is also possible to prevent the worker from falling by engaging the hook 11 with a member other than the telephone wire 5 or the overhead wire.

Therefore, in the case of this apparatus, it is necessary to use a considerably long lifeline 8 as in the case of the parent line 1 of FIG. 12, but unless the lifeline 8 is pulled out, the lifeline 8 is taken up by the take-up reel 7. The core 9 is kept wound up. Therefore, the whole is compact and convenient, and it is easy to store and transport. Further, the lifeline 8 of this device can be pulled out to both sides of the take-up reel 7, and it can be wound around the winding core 9 in the same direction at the same time. As a result, the required number of rotations of the winding core 9 can be halved. Therefore, even if the spring 14 is not so long, the lifeline 8 can be accurately wound. Emergency lock mechanism 16
The centrifugal force can also be kept within a certain range, and the winding core 9 can be locked accurately.

In the embodiment shown in FIGS. 6, 7 and 8, the tips of the two life ropes 20 and 21 are engaged with the core 9 of the take-up reel 7. The life lines 20 and 21 are half the length of the life line 8 and the entire length is the length corresponding to the height of the utility pole 1. Then, as in the device of FIG. 1, the life lines 20 and 21 are pulled out to both sides of the take-up reel 7, and the partition plates 22 are provided on the winding core 9, and the life lines 20 and 21 are simultaneously attached to the winding core 9 on both sides thereof. It is wound in the direction. Therefore, the spring 1
Even if you don't use a long one for 4, lifeline 20, 2
1 can be accurately wound, and the centrifugal force of the emergency lock mechanism 16 can be kept within a certain range.
The same effect can be obtained.

In the embodiment of FIGS. 9, 10 and 11,
A rope is used as the lifeline 23. This is also the structure described in Japanese Utility Model Publication No. 2-94569. In this case, the threads of high-strength and rigid fibers such as aramid fibers may be closely arranged in the width direction and the thickness direction of the outer casing sheet, but they may be appropriately knitted. Further, a radial through hole 24 is formed in the winding core 9, and the life rope 23 is inserted into the radial through hole 24 at the center position of the life rope 23,
The lifeline 23 engages with the winding core 9 and is wound on the winding core 9 simultaneously in the same direction on both sides of the partition plate 22.

[0017]

As described above, according to the present invention, the lifeline 8 is kept wound around the winding core 9 of the winding reel 7. Therefore, the whole is compact and convenient, and it is easy to store and transport. Further, the lifeline 8 can be pulled out to both sides of the take-up reel 7, and the lifeline 8 can be wound around the winding core 9 in the same direction at the same time. As a result, the required number of rotations of the winding core 9 can be halved. Therefore, even if the spring 14 is not so long, the lifeline 8 can be accurately wound. As for the centrifugal force of the emergency lock mechanism 16, the centrifugal force can be kept within a certain range, the core 9 can be locked accurately, and the intended purpose can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded view of the take-up reel of FIG.

FIG. 3 is a vertical sectional view of the take-up reel of FIG.

FIG. 4 is a cross-sectional view showing a state in which the lifeline of FIG. 1 is wound up.

5 is an explanatory diagram showing a usage state of the apparatus of FIG. 1. FIG.

FIG. 6 is an exploded view showing another embodiment.

7 is a vertical cross-sectional view of the take-up reel of FIG.

8 is a cross-sectional view showing a state in which the lifeline of FIG. 6 is wound up.

FIG. 9 is an exploded view showing another embodiment.

FIG. 10 is a vertical cross-sectional view of the take-up reel of FIG.

11 is a cross-sectional view showing a state in which the lifeline of FIG. 9 is wound up.

FIG. 12 is an explanatory diagram showing a usage state of a conventional device.

[Explanation of symbols]

 1 Utility pole 2 Worker 5 Telephone wire 7 Take-up reel 8 Lifeline 9 Core 11 Hook 14 Spring 16 Emergency lock mechanism

Claims (1)

[Claims] 1. A fall prevention device for preventing a fall of a worker at a work site at high places such as a utility pole, comprising a take-up reel and a length corresponding to the height of the work site at high places, and a center thereof. At a position, it engages with the core of the take-up reel, is pulled out to both sides of the take-up reel, has a hook at one end for engaging with a member at the work site at high places, and the other end at the body of the worker. A lifeline connected to the winding reel, a spring provided on the winding reel, elastically biasing the winding core in the rotation direction thereof, and simultaneously winding the lifelines on both sides of the winding reel around the winding core in the same direction, A fall prevention device provided on the take-up reel, comprising an emergency lock mechanism that locks the core by centrifugal force when the worker falls.