JP2001259065A - Rope with hook for safety belt for high lift work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hooked rope for safety belt for high lift work, which can absorb shock when a worker falls and which avoids the workability from being deteriorated. SOLUTION: A buffering ring 20 having plural bending parts 23a to 23d are provided between the rope 4 and a hook 5 connected to the safety belt. Workability is improved by preventing the occurrence of inconvenience where the ring 20 obstructs taking out of tools supported by the safety belt in the case of carrying out a high lift work with the hook 5 engaged with the fixing part of a building. When the worker falls, he/she is received by the rope 4 under tension and the shock on receiving him/her is buffered by the extension of bending parts 24a to 24d provided at the ring 20 to prevent a large shock from being applied to the worker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope with a hook connected to a safety belt for working at height.

[0002]

2. Description of the Related Art Generally, when working at a high place such as a construction site, a safety belt is worn, and a hook at a tip of a rope connected to the safety belt is engaged with a fixed portion such as a building or a safety fence. Safety measures to prevent workers from crashing.

[0003] By the way, in the above-mentioned working state, if the worker steps down and drops, the rope is tensed, and the rope is prevented from being caught by the tensed rope, and the fall is prevented. Since the worker is received suddenly, an extremely large shock is applied to the worker, and the shock may cause injury.

[0004] In order to solve such inconvenience, a safety belt has been proposed in which a shock absorber is mounted to absorb an impact force.

[0005]

In a safety belt with a shock absorber, the shock absorber itself is bulky and the bulky shock absorber is attached to the safety belt. Often protrudes and interferes with an obstacle when the working position is changed, or obstructs the removal or storage of tools supported by the safety belt, which has the disadvantage of significantly reducing workability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rope with a hook for a safety belt for working at heights, which is capable of absorbing a shock when dropped, and which is excellent in safety and workability.

[0007]

In order to solve the above-mentioned problems, according to the present invention, there is provided a safety belt for working at height having one end connected to a safety belt for working at height and a hook connected to the other end. In a rope with a hook, a structure in which a plurality of bent portions are provided between the rope and the hook, and a metal buffer ring having toughness for buffering an impact force applied to the rope by extension of the bent portion is provided. It was adopted.

As described above, by providing the shock absorbing ring between the hook and the rope, the rope is connected to the safety belt attached to the worker, and the hook at the tip of the rope is engaged with the structure or the like in the working state. If the worker steps down and falls and falls, and the rope is tensed and an impact force is applied, the bent portion of the buffer ring will extend and cushion the impact force, and the impact will be applied to the worker. Can be prevented.

Further, since the shock absorbing ring for absorbing the impact force is incorporated between the rope and the hook, there is a disadvantage that the shock absorbing ring hinders the taking out and storing of the tools supported by the safety belt. There is no occurrence of this, and workability can be improved as compared with a safety belt provided with a shock absorber.

Here, one end of each of a pair of connecting bars is integrated with the hook connecting ring connected to the hook at an outer peripheral opposing position, and a rope connecting ring overlapping each other is integrally provided at the other end of each connecting bar. By adopting the pair of connecting bars provided with a plurality of bent portions, the impact force can be buffered by the extension of each bent portion of the pair of connecting bars. Can be obtained.

In the above impact ring, the connecting position of each connecting bar with respect to each rope connecting ring is shifted in the circumferential direction with respect to a plane including the centers of the rope connecting ring and the hook connecting ring, so that the impact force can be reduced. At the time of buffering, since each bent portion of the connecting bar extends and each rope connecting ring rotates so that the connecting portion to the connecting bar coincides, the buffering time can be increased, and the buffering effect can be enhanced.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the safety belt for working at height has a ring 3 for connecting a rope attached to a body fastening belt 2 which can be fastened by a buckle 1.

One end of a rope 4 is connected to the ring body 3, and a hook 5 with a safety device is connected to the other end of the rope 4 via a buffer ring 20.

Here, the hook 5 is, as shown in FIG.
A hook body 6 having a hook 6a at its tip, a one-sided wing 8 provided on the ventral side of the hook body 6 and capable of swinging about a shaft 7, and a shaft 9 provided on the back side of the hook body 6; A safety wing 10 swingable about the hook body 6 and swinging the safety wing 10 so as to overlap the back of the hook body 6.
Unless the stopper piece 11 provided on the swinging end of the one-sided open wing 8 is retracted from the swinging range of the stopper edge 12, the opening of the hook 6a is closed from the inside. The wing 8 cannot be swung to the open position.

At the rear end of the hook body 6 of the hook 5, a connecting shaft 13 having a head 13a is provided.

As shown in FIG. 2 and FIG.
A pair of connecting bars 22a at positions opposed to the outer periphery of the hook connecting ring 21 connected to the connecting shaft 13 at the rear end of the hook body 6;
22b, one end of each connecting bar 22a, 22
b, a rope connecting ring 23a to which the rope 4 is connected to the other end;
23b are provided integrally, and the rope connecting ring 23a,
23b are superimposed on each other.

Each of the pair of connecting bars 22a and 22b is bent in a zigzag shape to form first to fourth bent portions 24a to 24b from the hook connecting ring 21 side.
The front shapes of the pair of connecting bars 22a, 22b are reversed.

In forming the buffer ring 20 as described above, a hook connecting ring 21 and a pair of zigzag connecting bars 22 are formed by plastic working as shown in FIG.
a, 22b and a rope connecting ring 23a, 23b are formed, and the formed material A is bent from a position indicated by a chain line A in FIG.

The buffer ring 20 is formed of a tough metal material. As such a metal material, SS400,
SCM415 can be mentioned.

The safety belt shown in the embodiment has the above-mentioned structure.
And the hook 5 at the tip of the rope 4 connected to the ring 3 of the body fastening belt 2 is engaged with a fixed portion such as a building.

In the above-mentioned use condition, if the worker steps down and drops, the rope 4 is tensioned,
The strained rope 4 prevents the worker from being caught and crashed. At this time, an impact force is applied to the buffer ring 20, and the impact force causes the connection bars 22a, 22b to be connected.
Each of the bent portions 24a to 24d extends as shown in FIG. 5, and the impact force is absorbed by the extension.

As described above, when an impact force is applied to the shock absorbing ring 20 by the fall of the worker, the two connecting bars 22a, 22
Since the bent portions 24a to 24d formed on the respective b expand and absorb the impact force, the shock absorbing effect is extremely high, so that a large impact force can be prevented from being applied to the worker.

Here, a shock absorbing ring 2 for absorbing a shock at the time of falling
0 is provided between the rope 4 and the hook 5, so that when the tools are taken out or stored from the tool bag supported by the safety belt, the buffer ring 20 interferes. The workability can be improved as compared with the case where the shock absorber is attached to the safety belt.

FIGS. 6 and 7 show another example of the buffer ring 20. FIG. The shock absorbing ring 20 shown in this example and the shock absorbing ring 20 shown in FIG. 2 are arranged such that the connecting positions of the connecting bars 22a and 22b shown in the hook connecting ring 21 are circumferentially shifted from a vertical plane passing through the center of the hook connecting ring 21. It is different in that. At this time, the connecting position of one connecting bar 22a to the rope connecting ring 23a and the connecting position of the other connecting bar 22b to the rope connecting ring 23b are shifted in the opposite direction by the same dimension in the circumferential direction.

As described above, a pair of connecting bars 22a, 2a
By shifting the connecting position of the 2b to the rope connecting rings 23a, 23b from the vertical plane passing through the center of the rope connecting rings 23a, 23b in the circumferential direction, when an impact force is applied to the buffer ring 20, the connecting bars 22a, 22b As each bent portion extends, the pair of rope connecting rings 23a and 23b rotate to a position where the connecting positions of the connecting bars 22a and 22b overlap in front and back, so that a longer buffering time can be taken and the buffering effect is further improved. be able to.

In the embodiment, the safety belt is shown in which the ring 3 is attached to the outer fastening belt 2 having the buckle 1 at the end, but the safety belt is not limited to this. For example,
A body fastening belt may be provided on the front side of the body contact belt, and a belt connecting ring may be attached to one of the belts.

[0027]

As described above, according to the present invention, by providing the buffer ring between the rope connected to the safety belt and the hook, the hook is engaged with the fixed portion of the structure or the like, and the height is increased. In the event that the worker steps on a foot and falls, the rope is tensioned and an impact force is applied to the shock absorber ring, the plurality of bent portions provided on the shock absorber ring extend and the above-described impact occurs. Since the force is buffered, it is possible to prevent a large impact force from being applied to the worker and to enhance safety.

Further, since the shock absorbing ring is provided between the rope and the hook, there is no inconvenience that the shock absorbing ring interferes with taking out or storing the tools supported by the safety belt. In addition, the workability can be improved as compared with the case where the shock absorber is attached to the safety belt.

Further, by connecting the hook connecting ring and the rope connecting ring with two connecting bars having a plurality of bent portions, it is possible to obtain a small, low-cost buffer ring having a high buffer effect.

[Brief description of the drawings]

FIG. 1 is a front view of a safety belt to which a rope with a hook according to the present invention is connected.

FIG. 2 is a front view showing the tip of the rope with a hook shown in FIG. 1;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a front view showing a shaped member for forming the buffer ring shown in FIG. 2;

FIG. 5 is a front view showing a buffer state of the buffer ring shown in FIG. 2;

FIG. 6 is a front view showing another example of the buffer ring.

FIG. 7 is a left side view of FIG. 6;

[Explanation of symbols]

 2 Body tightening belt 4 Rope 5 Hook 20 Buffer ring 21 Hook connecting ring 22a, 22b Connecting bar 23a, 23b Rope connecting ring 24a to 24d Bent portion

Claims (4)

[Claims] 1. A rope with a hook for an aerial work safety belt having one end connected to an aerial work safety belt and a hook connected to the other end, wherein a plurality of bent portions are provided between the rope and the hook. A rope with a hook for a safety belt for working at height, comprising: a metal buffer ring having toughness for buffering an impact force applied to the rope by extension of a bent portion thereof. 2. The buffer ring according to claim 1, wherein the buffering ring includes a hook connecting ring connected to a hook, two overlapping rope connecting rings to which a rope is connected, and one end integrated at a position facing the outer periphery of the hook connecting ring. The safety belt according to claim 1, wherein the other end comprises a pair of connecting bars integrated with a rope connecting ring, and the pair of connecting bars has a plurality of bent portions. rope. 3. The rope with a hook for a safety belt for working at heights according to claim 2, wherein the front shape of the pair of connecting bars is inverted. 4. The connecting position of each connecting bar with respect to each of the rope connecting rings is shifted in a circumferential direction with respect to a plane including the centers of the rope connecting ring and the hook connecting ring. The rope with a hook of the safety belt for working at heights according to 3.