JPH0260352B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety belt or safety device used by workers at heights to prevent falls, or a shock-absorbing belt used in vehicle safety belts for automobiles, aircraft, parachutes, and the like.

Conventionally, as shown in FIG. 11, this type of belt toy is made by folding and polymerizing the middle part of a belt toy woven from synthetic fibers, sewing the overlapped part in multiple strips, and attaching hooks to both ends of the belt toy. When a rope, ring, buckle, or mounting bracket is attached and its ends are torn apart, the sewing thread is torn from one side and cut, converting the impact energy into this sewing thread cutting force to absorb and alleviate the shock. Was. These conventional products have achieved their purpose as a shock absorber, but when producing them, the sewing machine belt, the characteristics of the worker, the sewing conditions, the sewing The quality may not be constant due to patterns, etc., and if unfavorable conditions occur, the load may become high, so if a worker falls while using it on a steel tower etc. by combining it with a fall prevention rope, the rope is restrained. There was also a risk of injury to workers, or of the rope breaking if it became entangled with an edge. Therefore, they had to be careful during production, resulting in inefficiency and high costs.

The object of the present invention is to eliminate and improve the drawbacks of such conventional products and to provide a belt equipped with a buffer mechanism at a low cost.

Aspects of the 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, synthetic fibers such as nylon or polyester are used, and the warp yarns 11 and 21 are made up and down every two weft yarns 12 and 22, so that each warp yarn 11 and 21 has four yarns in one cycle. , the upper belt 1 and the lower belt 2 of plain weave or twill weave are woven simultaneously by sequentially shifting their phases, and during the weaving, the weft 12 of the upper belt 1 and the weft 22 of the lower belt 2 are wefted by a plurality of leno warps 3. The above-mentioned upper belt 1 and lower belt 2 are weaved by weaving the upper and lower belts 1 and 22 respectively with the twine warp 3 temporarily retracted to form an overlapping part 4 of a predetermined length. Separated part 5 of a predetermined length
The shock absorbing belt is constructed by alternately and continuously weaving the overlapping portions 4 and the separating portions 5, and the leno warp 3 is the warp 11 of the upper and lower belts 1 and 2. , 21 and threads thinner than the wefts 12, 22.
The relative weaving structures of the two entangled warps 3 and 3 shown in A to 3-G are inserted into each of the warps 11 and 21 of the upper belt 1 and the lower belt 2 as a set, and the upper and lower belts 1 , 2, weaving is carried out by weaving up and down between the two wefts 12, 222.

Regarding the relative weaving structure of the leno warp 3 shown in FIG. 4, 3-A is a relative pattern of 1 up and 1 down. 3-B is a relative pattern of 1 up and 3 down, and when it goes down 3, it is irregular in that it goes 1 up and 1 down within the weft of its own belt. 3-C is a relative pattern of 2 up and 2 down. 3-D is a relative pattern of 1 up and 2 down. 3-E is a relative pattern of 2-up and 3-down, and like 3-B, it has an irregular pattern in which the inside of the weft of the own belt is up-down when it goes 3-down. 3-F is a relative pattern of 2 up and 3 down. 3-G is a relative pattern of 1 up and 3 down. There are many other possible patterns.

An example of the arrangement of the warp yarns 11, 21, weft yarns 12, 22, and leno warp yarns 3 of the present invention is shown in FIG. 3, where the portion 5 represents the separated portion and the portion 4 represents the overlapping portion. . In this overlapping part 4, a pair of leno warp threads 3 is inserted between each of the warp threads 11 and 21, and all relative weaving structures of 3-A to 3-G are arranged. There is, but 3-A~
3-G, the relative weaving structure of the lewd warp 3 made of one type or a combination of two or more types is sequentially arranged between each warp 11, 11 and between each warp 21, 21, and weaving is performed. As a result, one pair of 3-A and two pairs of 3-B are sequentially arranged between each warp 11 and 11 and between warps 21 and 21 in a cycle, and for 3-B, the phase is set in pairs. Weave by shifting one or two positions. Shifting the phase of this entangled warp 3 is done by preventing the same entanglement of the entangled warp 3 from overlapping in the width direction of the belt with the wefts 12 and 22 located at the same position on the upper belt 1 and lower belt 2, so that each weft 12 and 22 of the upper belt 1 and lower belt 2 are , 22 to average the entanglement conditions of the entangled warp 3.

To use the belt of the present invention, for example, when using it as a shock absorber for fall prevention as shown in FIG. After cutting, a predetermined part of the separating part 5 or the central part of the overlapping part 4 and the central part of the separating part 5 are sequentially cut, and one end is made a free end, or the end of the upper belt 1 and the lower belt 2 are cut. The upper belt 1 and the lower belt 2 are each folded over and sewn together at the other end (upper side in FIG. 5) to form ring parts 7 and 8. A rope 9 or a hook 10 is connected to the ring parts 7 and 8. The overlapping portion 4 of the belt is folded and placed in a heat shrinkable tube or package (not shown). The tip of the rope 9 is connected to a structure such as a steel tower, and the hook 10 is connected to a safety belt (not shown) worn by a worker to perform high-altitude work. When the ring falls and is restrained by a rope 9 or the like, a sudden impact load is applied to both ring parts 7 and 8 in the tearing direction shown by the arrow. (Fig. 6) Due to this impact load, the overlapping part 4 woven with the leno warp 3 is torn from one side, and the leno warp 3
are sequentially cut from one side, and the impact load is absorbed and alleviated by the cutting force of the weft threads 3, thereby safely restraining the operator. The Ministry of Labor's standards for safety belts stipulate that safety belts must be designed to keep the impact load to 900 kgf or less when a sand bag weighing 75 kg, which is equivalent to the average human body, is dropped and restrained with a rope. . When the belt of the present invention is used as the above-mentioned shock absorber, the oscilloscope shows the 8th
The waveform becomes like A in the figure, which is less than 1/2 (400
Kgf) can withstand impact loads. The waveform A is more flat than the waveform B shown in FIG. 8 (the waveform of the conventional product shown in FIG. 11). This is the overlapping part 4 of the woven belt.
Because it is used as is without any processing, unlike conventional products that are sewn,
This shows that the quality is consistent.

FIG. 7 shows another example of the use of the fall prevention shock absorber, in which the middle part of each overlapping part 4 of the belt is cut, and the upper belt of the separating part 5 located between both overlapping parts 4, 4 is cut. 1 and the lower belt 2 are divided into upper and lower parts,
The center portions of each of the upper and lower belts 1 and 2 are folded back and ring portions 7 and 8 are provided there, and used in the same manner as the one shown in FIG. 5 above.

FIG. 9 shows an example of using the belt of the present invention as a fall prevention safety belt, in which the upper belt 1 and the lower belt 2 are cut at the separating portion 5 with the cutting points slightly shifted. At the separation part 5 located at the right end, the upper belt 1 is left as is, and the lower belt 2 is shortened and a ring 6 is attached to it.
In the separation section 5 located at the left end,
The buckle 17 is attached by passing the buckle 17 through the longer lower belt 2, folding it back, overlapping it with the free end of the upper belt 1, and sewing it. this ring 1
A safety belt with a rope or the like attached to 6 is attached to the worker's body, and the safety belt is passed around the body and the free end of the upper belt 1 on the right end is inserted into the buckle 17 attached on the left end. and tighten.

If you fall while using this safety belt, you will be restrained by a rope as described above, but in this case, the ring 16 is suddenly pulled by the rope, and the lower belt 2 to which the ring is attached is also pulled. The overlapping portion 4 is torn from the ring 16 side, and the twisted warp threads 3 are sequentially cut, absorbing and relieving the impact load in the same way as the shock absorber.

FIG. 10 shows an example of a safety belt other than the above-mentioned example used as a shock absorber, in which a ring 16 or a tool holder (not shown) is inserted and held through the upper belt 1 or lower belt 2 in the separating section 5. It is what you use. In this case, there is no buffering effect as described above, but parts inserted through the belt, such as the ring 16 and the pliers holder, can be moved freely.

In weaving the belt of the present invention, the polymerization part 4
In order to adjust the buffering effect caused by the weaving, the optimum weaving method can be selected by changing the thickness, number, weaving pattern, weaving length, etc. of the leno warp 3.

For example, to keep the impact load low, make the entanglement warp threads 3 thinner or reduce their number to lengthen the overlapping part 4, and increase the tearing distance (time) between the upper belt 1 and the lower belt 2 when receiving the impact load. It is possible. However, in this case, the falling distance will be longer and there is a possibility of colliding with other objects during that time, so the above-mentioned method is recommended so that the impact load can be lowered to about 1/2 to 1/3 of the expected impact load. Adjust the weaving method, etc.

The present invention is constructed as described above, and while weaving an upper belt 1 and a lower belt 2 of plain weave or twill weave at the same time, a plurality of leno warp threads 3 are interwoven with the weft threads 12 of the upper belt 1 and the weft threads of the lower belt 2. 22 and weaving to form an overlapping part 4 of a predetermined length, and then the entangled warp threads 3 are retracted to form a separating part 5 of a predetermined length that separates the upper and lower belts 1 and 2. The overlapping section 4 and the separating section 5 are arranged in succession alternately, and the parts are cut from a predetermined part to be used as a shock absorber or overlapping section. Since the buffer part (overlapping part 4) is used in the same condition, there is no need to sew the buffer part (overlapping part 4) as in the conventional method, which greatly improves production efficiency. pattern,
It can be woven in such a way that an excellent cushioning effect can be obtained by considering the arrangement and other factors. In addition, by weaving under the same conditions, the same cushioning effect can be obtained no matter which part is used, and a reproducible, safe quality and highly safe shock absorber can be provided.
In addition, since the belt is used as it is woven, it is highly flexible and does not take up much space even when stored in a capsule, making it compact and convenient to carry. In addition, when the belt of the present invention is used, the buffer load can be significantly reduced to less than half of the predetermined value, so it has remarkable effects such as being able to safely restrain workers or users without injuring them. There is.

[Brief explanation of the drawing]

Fig. 1 is a side view of the belt of the present invention, Fig. 2 is an explanatory diagram of its longitudinal weave structure, Fig. 3 is a schematic plan view showing the weave structure of a part of the belt, and Fig. 4 is a diagram of the tangled warp. An explanatory view showing an example of a longitudinal weave structure, Figs. 5 and 6 are explanatory views showing an example of use, Fig. 7 is an explanatory view showing a second example of use, and Fig. 8 is an explanatory view showing an example of the present invention and a conventional product. FIG. 9 is an explanatory diagram showing the third usage example of the present invention, FIG. 10 is an explanatory diagram showing the fourth usage example, and FIG. 11 is an explanatory diagram showing the fourth usage example. It is an explanatory view showing a conventional product. Codes in the diagram: 1 is the upper belt, 2 is the lower belt, 3
4 is the overlapping part, 5 is the separating part, 11 is the warp of the upper belt, 12 is the weft, 21 is the warp of the lower belt, and 22 is the weft.

Claims (1)

[Claims] 1. An overlapping part 4 in which the upper belt 1 and the lower belt 2 are woven by a plurality of entangled warp threads 3, and a separating part 5 in which the upper belt 1 and the lower belt 2 are separated are alternately continuous. At least one overlapping portion 4 and one or more separating portion 5 are obtained by cutting the overlapping portions 4, the separated portions 5, or arbitrary portions of the overlapping portion 4 and the separating portion 5 of the belt body woven by One or both ends of the belt are firmly joined to withstand the impact load of a falling human body, and the separated parts of the upper and lower belts are sandwiched between the joined part and the overlapping part that becomes the shock absorbing part. A method for manufacturing a shock absorbing belt, characterized in that a shock absorbing belt is used as a joint part with another member. 2. The method for manufacturing a shock absorbing belt according to claim 1, wherein the upper belt 1 and the lower belt 2 are made of twill weave. 3. The method for manufacturing a shock absorbing belt according to claim 1, wherein the upper belt 1 and the lower belt 2 are made of plain weave. 4. Claim 1, wherein the upper belt 1 and the lower belt 2 have the same weaving pattern.
A method for manufacturing a shock absorbing belt according to item 1, 2 or 3. 5 The leno warp 3 constituting the overlapping part 4 has a 1 up 1 down, 1 up irregular 3 down, 1 up irregular 3 down, 1 up 1 down, 1 up irregular 3 down,
It is characterized by having relative weaving patterns such as 1 up 3 down, 2 up 2 down, 1 up 2 down, 2 up irregular 3 down, 2 up 3 down, etc., and weaving one type or a combination of two or more of these patterns. Claims 1 and 2,
A method for manufacturing a shock absorbing belt according to item 3 or 4. 6. The impact according to claim 1 or 5, characterized in that the leno warp 3 is thinner than the warp 11, 21 and weft 12, 22 of the upper belt 1 and the lower belt 2. A method of manufacturing an absorbent belt. 7. Claim 1, characterized in that the warp 11 and weft 12 of the upper belt 1 and the warp 21, weft 22 and leno warp 3 of the lower belt 2 are made of synthetic fibers such as nylon, polyester, vinylon, etc. A method for manufacturing a shock absorbing belt according to item 2, 3, 4, 5, or 6. 8. A method for producing a shock absorbing belt according to claim 1 or 7, characterized in that the fibers constituting the upper belt 1 and the lower belt 2 and the entanglement warp 3 are made of synthetic fibers of the same quality. . 9. A method for producing a shock absorbing belt according to claim 1 or 7, characterized in that the fibers constituting the upper belt 1 and the lower belt 2 and the entangled warp yarns 3 are made of synthetic fibers of different nature. .