JPH09168606A - Harness type safety belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure and to provide sufficient impact absorbability against a falling accident. SOLUTION: When a worker M wearing this harness type safety belt encounters an unexpected falling accident at a high working site, the body is safely supported by a life line 15, and at the time, the impact load of more than 10 times of the body weight of the worker M is applied from the life line 15 to the safety belt and the action of extending impact absorbing parts 17 provided in shoulder belts 12a and 12b is performed. Thus, sewing thread for overlapping and sewing the belts of the impact absorbing parts 17 is cut, an overlapping part is extended and an original single belt is returned. By the action, the impact load is absorbed and an impact applied to the body of the worker M is mitigated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a harness type safety belt used for work safety at a work site at a high place or the like.

[0002]

2. Description of the Related Art Conventionally, at a work site at a high place, it is mandatory to wear a safety belt in order to ensure the safety of workers from accidents caused by falling. This safety belt includes a belt-type belt that connects a body tightening belt and a lifeline,
There is a harness type in which a shoulder belt and a crotch belt are added to a body tightening belt, and a lifeline is connected to the shoulder belt.

In the event that a worker falls down at a high-altitude work site, the safety belt can be used to support the worker's body to avoid personal injury. However, when the kinetic energy generated by the actual fall is supported by the safety belt, there is a problem that an impact load of 10 times or more the weight of the worker is directly applied to the body of the worker via the safety belt.

[0004] Therefore, in order to reduce the impact, a safety belt is provided which is provided with an impact absorbing portion in which a flat belt is double-stacked and sewn, and the suture is cut when dropped to absorb the impact. Is disclosed, for example, in JP-A-3-55070.

As shown in FIG. 7, a harness-type safety belt in which a shoulder belt 1 and a crotch belt 3 are added to a body tightening belt 2 is also used as described above.
This safety belt is composed of two shoulder belts 1a and 1b, a body fastening belt 2, and crotch belts 3a and 3b.
And a metal ring 4 is attached at a position where the two shoulder belts 1a and 1b cross each other on the back side.
A metal ring 8 of a shock absorbing portion 7 provided at the tip of the lifeline 6 is connected via a carabiner 9.

[0006]

However, in the case of the former belt-type safety belt, the body tightening belt is fixed to the worker's waist to support the body. There is a problem that it is difficult to maintain a balance. In addition, if the belt-type safety belt is provided with a shock absorber, the belt will be stretched after the shock absorber is activated, and the worker will fall off the belt. It is common to provide a part.

In the case of the latter harness type safety belt, since the shock absorbing portion 7 is fixed to the tip of the lifeline 6, when the shock absorbing portion 7 is extended by a drop impact, the lifeline is caused by the reaction of the impact. 6 may be entangled with the worker M's body.

An object of the present invention is to solve the above-mentioned problems,
(EN) Provided is a harness-type safety belt capable of obtaining sufficient shock absorption against a fall accident and ensuring safety.

[0009]

A harness-type safety belt according to the present invention for achieving the above object comprises a crotch belt, a shoulder belt connected to the crotch belt, and a body tightening belt connected to these belts. A harness-type safety belt for attaching a connecting ring to the shoulder belt and connecting a lifeline to the shoulder belt via the connecting ring, wherein a belt is provided between the connecting ring and the crotch belt. The overlapped portion is overlapped by a predetermined length in the thickness direction, the overlapped portion is sewn with a binding thread having a predetermined strength, and an impact absorbing portion acting by breaking the binding thread of the sewn portion is interposed. And

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 shows a configuration diagram of a harness-type safety belt of the first embodiment. Shoulder straps 12a and 12b are respectively coupled to side portions of crotch straps 11a and 11b attached to the thighs of the worker M, respectively.
These shoulder straps 12a and 12b cross over the back of the worker M to reach from the shoulder to the chest and abdomen.
It is connected to the front of 1a, 11b.

A body tightening belt 13 can be mounted on the body of the worker M. The body tightening belt 13 is provided with shoulder belts 12a, 12a at four places before and after the worker.
b, a buckle (not shown) is provided at the front of the body tightening belt 13 so that the body tightening belt 13 can be fastened to the body of the worker M. A metal ring 14 is attached to the intersection of the shoulder belts 12a and 12b, and a carabiner 16 to which the tip of a lifeline 15 is connected is detachably connected to the metal ring 14.

An impact absorbing portion 17 is interposed between the two shoulder belts 12a and 12b below the metal ring 14, and the impact absorbing portion 17 has a structure as shown in FIG. I have. That is, the shoulder belts 12a, 12b
A part of each of them is overlapped in the thickness direction, for example, in a double manner to form a superposed portion 18, and the superposed portion 18 is sewn with a binding thread 19 having a predetermined strength. Further, the overlapping portion 18 is folded in one direction as shown in FIG. 3, and is covered with a cover 20 as shown in FIG. The stitching with the binding thread 19 can also be performed in a state of being folded in three as shown in FIG.

When the worker M wearing the harness-type safety belt having such a configuration encounters an unexpected accident at a work place at a high place, his body is supported by the lifeline 15. However, at this time, an impact load more than 10 times the weight of the worker is applied to the safety belt via the lifeline 15,
The effect of extending the shock absorbing portions 17 of the shoulder belts 12a and 12b is exerted. As a result, the cover 20 is torn and the binding thread 19 suturing the overlapping portion 18 is torn, and the overlapping portion 1
7 is stretched back to the original single belt as shown in FIG. By performing this action, the impact load is absorbed, and the impact applied to the worker M's body can be reduced.

Thus, the two shoulder belts 12a,
12b, the impact absorbing portions 17 are provided at the same positions.
Only half the length of each shock absorbing part is required, the change in the length of the belt when stretched is reduced, the recoil at the time of a drop impact is suppressed, and the balance of the body is unstable due to the entanglement of the lifeline 15 Can be avoided.

The shock absorbing portion 17 is provided on the shoulder belt 12.
It is only necessary to slightly increase the lengths of a and 12b, and it is not necessary to provide a separate shock absorbing portion 17 and attach a fitting or a process for connecting the shock absorbing portion 17 to the lifeline 15. A harness-type safety belt having the same can be formed.

FIG. 6 shows the construction of the harness type safety belt according to the second embodiment. One shoulder belt 12c is folded at a predetermined position on the back side of the worker, and the folded portion is connected to a metal ring 14a. The intermediate belt 21 is connected to the intermediate belt 21, and a belt 22 is attached between the intermediate belt 21 and the crotch belts 11a and 11b via a metal ring 14b. The intermediate belt 21 is provided with an impact absorbing portion 23 having the same structure as that of the first embodiment, and the other portions are the same as in FIG.

The operation and effect of this embodiment are almost the same as those of the first embodiment, but the overlapping portion is two times larger than that of the first embodiment.
Unless the length is doubled, the same shock absorbing effect cannot be obtained.

Further, Japanese Industrial Standards stipulate that "a safety belt once subjected to a large impact should not be used again even if its appearance does not change". When the shock absorber is provided on the lifeline side, the lifeline is completely extended and cannot be used again, but in the case of the belt-type safety belt, there is a possibility that it is reused because there is almost no change in appearance. However, the harness-type safety belt according to the present invention cannot be reused because the impact absorbing portions 17 and 23 are fully extended.

[0019]

As described above, in the harness type safety belt according to the present invention, the shock applied to the worker in the event of an accidental fall is alleviated by providing the shock absorbing portion on the belt on the back side. Sufficient security can be maintained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment.

FIG. 2 is a side view of the shock absorbing unit.

FIG. 3 is a perspective view of a shock absorbing unit.

FIG. 4 is a cross-sectional view of the shock absorbing section.

FIG. 5 is an explanatory view at the time of a drop impact.

FIG. 6 is a configuration diagram of a second embodiment.

FIG. 7 is a configuration diagram of a conventional harness type safety belt.

[Explanation of symbols]

 11a, 11b Crotch belt 12a, 12b, 12c Shoulder belt 13 Body tightening belt 14, 14a, 14b Metal ring 15 Lifeline 17, 23 Shock absorbing part 18 Overlapping part 19 Binding thread 20 Cover 21 Intermediate belt

Claims (3)

[Claims] 1. A crotch belt, a shoulder belt connected to the crotch belt, and a body tightening belt connected to these belts, a connection ring is attached to the shoulder belt, and the shoulder strap is connected via the connection ring. A harness-type safety belt for connecting a lifeline to a belt, wherein a part of the belt is overlapped by a predetermined length in a thickness direction between the connection ring and the crotch belt, and the overlapped portion has a predetermined strength. A harness-type safety belt, comprising a stitch and a shock absorbing portion acting by tearing the stitch of the stitching portion. 2. The harness type safety belt according to claim 1, wherein the shock absorbing portions are provided on the two shoulder belts, respectively. 3. The harness type safety belt according to claim 1, wherein the impact absorbing portion is covered by a cover.