JPH03202Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an invention mainly related to the improvement of shock-absorbing belts used for safety belts and safety devices used by workers at heights to prevent falls, and vehicle safety belts for automobiles, aircraft, and parachutes. .

Conventionally, this type of belt was proposed in Japanese Patent Application No. 57-103635, which was previously proposed by the present applicant. There was a structure in which both belts were polymerized and woven using intertwined warp yarns, and the polymerized part was used as a buffer part.

However, since these buffer sections have the same number of entangled warp threads woven throughout from the start to the end of weaving, if an impact load is applied during use and the buffer section is torn from one side, the result shown in Figure 6 is As shown in the oscillographic waveform shown, the initial load was high, so the moment the worker was stopped from falling, the human body would be subject to a high impact load, which could cause injury to internal organs.

It is an object of the present invention to provide a buffer belt that eliminates and improves these drawbacks and can provide a safer buffering effect when stopping a fall.

Aspects of the present invention will now be described in detail with reference to an embodiment illustrated in the accompanying drawings.

As shown in the figure, in this embodiment, two upper belts 1 and a lower belt 2 are woven in a plain weave or twill weave using synthetic fibers such as nylon Tetron, and are partially polymerized and woven by a plurality of entangled warps 3. A buffer section 4 is formed by cutting a predetermined portion of a belt body in which the separation section 5 in which the upper and lower belts 1 and 2 are separately woven and the buffer section 4 are alternately and continuously woven for a predetermined length. In a case where a buffer belt 6 is formed with a pair of separating part 5 and a buffer part 4, the number of entangled warp threads 3 composing the buffer part 4 is set to a predetermined length from the separating part 5 side of the buffer part 4. An initial loosening section 7 is provided in which the number of threads is increased step by step in several stages, and after that, the buffer section 4 is made continuous by the same number of entangled warp threads 3.
It has a structure consisting of.

In other words, as shown in FIG.
For example, one-third of the intertwined warp yarns 31 are woven into a predetermined length (entangled with the weft yarns 9 and 9 of both belts 1 and 2), and both belts are overlapped, and then the other belts are woven by a predetermined length. One-third of the entangled warp 32 is woven together with 31, and then the remaining one-third of the entangled warp 3 is woven.
3 together with 31 and 32, and then continuously polymerize and weave both belts 1 and 2 with the total number of entangled warps 3 of these entangled warps 31, 32, and 33, thereby forming the buffer portion 4. Of course, the beginning part 7
The distribution of the entangled warp threads 31, 32, and 33 in the section does not necessarily have to be divided into thirds, and may be distributed appropriately based on the buffering effect, or may not be distributed in stages, for example, as shown in Fig. 2. If so, the number of entangled warp yarns 3 may be gradually increased as weaving is carried out from the left to the right.

Further, when weaving both the belts 1 and 2 of the separation section 5, it is preferable that the entangled warp threads 3 are retracted to the outside of either of the belts 1 and 2. (Fig. 1) To use the present invention, the first loosening part 7 of the buffer part 4 of a continuously woven belt body as shown in Fig.
A buffer belt 6 is formed by cutting the boundary with the separation part 5 at the end where the buffer part 4 and the separation part 5 are not provided, and at this time, the tangles exposed from both belts 1 are The warp threads 3 are cut off near the base of the exposed portion and discarded. The slightly exposed ends of the entangled warp yarns 3 at the cut portion are either left as they are or are heat-welded to each other.

Belts 1 and 2 at separation section 5 of buffer belt 6
By folding and sewing each of them, ring parts 8, 8 are provided there, and a ring, hook, rope, or safety device (not shown) is attached to one or both of the ring parts 8.
Attach etc. Alternatively, one of the belts 1 or 2 may be directly connected to the safety belt.

The buffer section 4 may be folded and covered with a capsule (not shown) such as synthetic leather or heat shrink tube.
Store it inside the safety belt and use it.

If, for example, a worker slips and falls while working at a height while using the shock absorbing belt of the present invention, both rings 8 and 8 of the belts 1 and 2 should be removed, as shown in FIG.
A high impact load is applied to the machine in the direction of the arrow, and the intertwined warp threads 3 are torn and cut one after another from the side of the buffer section 7, and the worker who has fallen is killed while absorbing and alleviating the impact load by cutting the intertwined warp threads 3. Detain safely.

If the impact load at this time of retention is measured using an oscillograph, the waveform will be as shown in FIG. That is, in the initial rising portion of the impact, among the entangled warps 3 constituting the initial loosening section 7 of the buffer section 4, the smallest number of entangled warps 31 in the first stage are cut, and then the entangled warps 31 in the second stage are cut. 31 and 32 are cut, and then the entangled warp yarns which are weaved and polymerized by all the entangled warps 3 of the third stage entangled warp yarns 31, 32, and 33 are sequentially cut. When the intertwined warp yarns 3 in the third stage are cut, the waveform is cut while maintaining a substantially constant height (load) in the horizontal direction, thereby absorbing and buffering the impact load.

In this way, in the present invention, since the initial loosening part 7 is provided in the part of the buffer part 4 near the separating part 5, in which the number of entwined warp threads 3 is changed, the initial impact load when the human body is restrained is reduced to the 6th part. Unlike the conventional product shown in the figure, it stands up smoothly and absorbs and alleviates shock, so it can be safely stopped without applying a heavy load to the human body or injuring internal organs.

In addition, the initial loosening part 7 of the buffer part 4 of the present invention is the entwined warp 3
The number of threads woven in is smaller than in other parts, especially in the part of the entangled warp 31, so it may break with a relatively low impact load or a part may slip through. By inspecting the exposed ends of the entangled warp yarns 3, it is possible to determine whether any impact load has been applied to the buffer belt, which can also serve as a guideline for replacement. Of course, if much of the buffer section 4 is torn, it goes without saying that it will need to be replaced since a high impact load is being applied to it.

In this way, the present invention provides the initial relaxation part 7 in the buffer part 4, so that when a worker working at height receives an impact load, it absorbs and relieves the impact, and in particular protects the human body by suppressing the high impact at the beginning of the load. , it can be used as a guide for checking and replacing the buffer belt, and other remarkable effects can be obtained.

[Brief explanation of the drawing]

Figure 1 is a side view of the belt of the present invention in a continuously woven state, Figure 2 is an explanatory diagram of its longitudinal weaving structure, Figure 3 is a perspective view of the buffer belt of the present invention, and Figure 4
The figure is an explanatory diagram of an example of the use of the present invention in which a shock load is applied and the buffering effect is applied. Figure 5 is an oscillographic measurement waveform diagram showing the buffering effect in an example of the use of the present invention. Figure 6 is a conventional example. FIG. 7, which is an oscillographic measurement waveform diagram for the product, shows another embodiment of the buffer belt. Codes in the diagram: 1 and 2 are belts, 3 is entwined warp,
4 is a buffer section, 5 is a separation section, and 7 is an initial relaxation section.

Claims (1)

[Claims for Utility Model Registration] 1. Two upper belts woven using synthetic fibers 1.
In the buffer belt 6, the buffer part 4 is provided with a buffer part 4 in which the upper and lower belts 2 are partially polymerized and woven by a plurality of entangled warps 3, and a separating part 5 in which the upper and lower belts 1 and 2 are separately woven. It is characterized by a structure in which an initial loosening part 7 is provided in which the number of entangled warp yarns 3 woven into the buffer part 4 is gradually increased by a predetermined length from the separation part 5 side of the buffer part 4, and thereafter the buffer part 4 is continuous. buffer belt. 2. The buffer belt according to claim 1, wherein the initial loosening part 7 has a structure in which the number of entangled warp threads 3 is increased in stages from the separation part 5 toward the buffer part 4. 3. The buffer belt according to claim 1, wherein the initial loosening part 7 has a structure in which the number of entangled warp threads 3 is gradually increased from the separation part 5 toward the buffer part 4.