JPS6315863B2 - - 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 impact. Was. These conventional products have achieved their purpose as a shock absorber, but when producing them,
Since each item is sewn individually, the quality may vary depending on the characteristics of the sewing machine and belt, the characteristics of the worker, sewing conditions, sewing patterns, etc., and under unfavorable conditions, high loads may occur, resulting in crashes. If a worker falls and is held back while connected to a prevention rope and used on a steel tower, there is a risk of injury to the worker, or the rope may break if it is tangled around an edge. It was hot too. 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 up and down every two weft yarns 12 and 22, and each warp yarn 11 and 21 is made of four yarns in one cycle. The upper belt 1 and the lower belt 2 of the twill weave are woven at the same time by sequentially shifting the phase and interweaving the twill warp 3 which is thinner than that between each warp, and during the weaving, the twill weave is woven by the tangle warp 3. The weft 12 of the upper belt 1 and the weft 22 of the lower belt 2 are relatively entangled to form an overlapping part 4 of a predetermined length, and then the entangled warp 3 is divided into two to form the upper and lower belts 1, 2. The upper and lower belts 1 and 2 are woven separately into the upper and lower belts 1 and 2 to form a separation part 5 of a predetermined length separating the upper belt 1 and the lower belt 2, and the overlapping part 4 and the separation part 5 are separated. The shock absorbing belt is constructed by alternately and continuously weaving, and the leno warp 3 is the warp 11, 21 and weft 12 of the upper and lower belts 1, 2.
Using yarns thinner than 22, the upper belt 1 and Insert between each of the warp threads 11 and 21 of the lower belt 2, and insert both weft threads 1 of the upper and lower belts 1 and 2.
Weaving is carried out by going up and down between 2 and 22.

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 3 down, 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 irregularity in that when it goes 3 down, it goes up and down within the weft of its own belt. 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.

Further, the upper and lower belts forming the separation part 4, 1,
In No. 2, the leno warp 3 has a one-up, one-down weaving structure within its own belt.

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 each leno warp 3 is inserted between each of the warps 11 and 21, and the relative weaving structure of all 3-A to 3-G is formed. , 3-A~3-
The relative weaving structure of the entangled warp 3 by one type or a combination of two or more types of G is sequentially determined by each warp 1.
1 and 11 and between warp threads 21 and 21. As an example, one pair of 3-A and 3
- B are sequentially arranged between each warp thread 11 and 11 and between warp threads 21 and 21 in a cycle in which two pairs of B are set as one set,
Regarding 3-B, weaving is performed with the phase shifted by one or two in pairs. Shifting the phase of this entangled warp 3 is done so that the same entanglement of the entangled warp 3 does not overlap in the width direction of the belt with the wefts 12 and 22 located at the same position on the upper belt 1 and the lower belt 2.
This is to average out the entanglement conditions of the entanglement warp 3 for each weft 12 and 22. Further, in the separating section 5, one of the pair of opposing twine warps 3, 3 woven in the overlapping section 4 is distributed to the upper belt 1 and the other to the lower belt 2, and weaved within the own belt.

In order to use the belt of the present invention, for example, when using it as a shock absorber for fall prevention as shown in FIG. 5, as shown in FIG. A predetermined portion of the belt body 100 is cut to form a belt unit 101 having one or more overlapping parts 4 and one or more separating parts 5 as shown in FIG.
A belt unit 101 is formed by cutting a portion of the belt body 100 shown in FIG.
Figure 3 A) Also, the boundary part A between the overlapping part 4 and the separating part 5 of the belt body 100 and the central part D of the overlapping part 4
to form a single belt 101, (the first
(Fig. 3B) Furthermore, a belt unit 101 is formed by cutting the center portion C of the separating portion 5 of the belt body 100 and the center portion D of the adjacent overlapping portion 4.
(C) Furthermore, a belt unit 101 is formed by cutting the belt body 100 between the central portion C of the separating portion 5 and the central portion E of the next separating portion 5 with the overlapping portion 4 interposed therebetween. (Fig. 13 d) Note that the length of each belt unit 101 shown in Fig. 13 is for ease of understanding.
Although the drawings are drawn according to the scale when a predetermined portion of the belt body 100 shown in FIG. The length of 4 is decided and weaved. One end side of the single belt 101 is a free end, or the end of the upper belt 1 and the end of the lower belt 2 are joined 6 to each other,
On the other end side (upper side in FIG. 5), the upper belt 1 and the lower belt 2 are each folded back and sewn together to form ring parts 7 and 8. Rope 9 is attached to these ring parts 7 and 8.
Or connect hook 10. 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, which is double woven with the leno warp 3, is torn from one side, and the leno warp 3 is sequentially cut from one side, and the twine warp 3 is cut due to the impact load. Absorbs and relieves force and safely restrains workers.

Standards for safety belts for workers stipulate that safety belts must be designed to keep the impact load to 900 kgf or less when a sandbag weighing 75 kg, which is equivalent to the human body, is dropped and restrained with a rope. There is. When the belt of the present invention is used as the above-mentioned shock absorber, an oscilloscope shows a waveform as shown in A in FIG. 8, and the shock load can be suppressed to less than one-half (approximately 400 kgf). 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 shows that the overlapping part 4 of the woven belt is used as it is without any processing, so unlike conventional products that are sewn, the quality is consistent.

FIG. 7 shows another example of the use of the fall prevention shock absorber, in which the center portion D of the overlapping portion 4 of the belt body 100 shown in FIG. A belt unit 101 having two overlapping parts 4 and one separating part 5 is formed by cutting the central part F of the part 4, and (FIG. 13E) double polymerization of the belt unit 101 is performed. The upper belt 1 and the lower belt 2 of the separation part 5 located between the parts 4 and 4 are divided into upper and lower parts, and the center parts of the upper and lower belts 1 and 2 are folded back and ring parts 7 and 8 are attached thereto. It is used in the same way as the one shown in FIG. 5 above.

Figure 9 shows an example of using the belt of the present invention as a safety belt for fall prevention.
Cut one of the upper belts 1 and lower belts 2 at the separated portion 5 of the belt body 100 shown in the figure at the part indicated by the arrow G, with the position shifted, and cut the other one at the next separated portion with the adjacent overlapping portion 4 in between. In step 5, the upper and lower belts are shifted in the same way as above and cut at the part indicated by the arrow H to form a single belt 101 having separating parts 5, 5 at both ends and an overlapping part 4 in the center (see Fig. 13). ) In the separation part 5 located on the right side of the belt unit 101, the upper belt 1 is left as it is for a long time, the lower belt 2 is shortened and a ring 161 is attached to it, and in the separation part located at the left end, the longer one is left as is. Pass the buckle 17 through the lower belt 2 and fold it back to the upper belt 1.
The buckle 17 is attached by overlapping the free end of the buckle and sewing it together. A safety belt made by connecting a rope or the like to this ring 16 is used by attaching it to the body of the worker.The safety belt is passed around the body and the free end of the upper belt 1 on the right end is connected to the buckle 17 attached on the left end. Insert 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, in order 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. This is possible by doing. 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 simultaneously weaving an upper belt 1 and a lower belt 2 of a plain weave or twill weave in which a plurality of leno warp threads 3 are woven, the upper belt 1 is weaved with the leno warp threads 3 midway through the weaving. Weft 1
2 and the weft 22 of the lower belt 2 are bent and woven to form an overlapping part 4 of a predetermined length, and then the entanglement warp 3 is divided into two again and woven into the upper and lower belts 1 and 2 and retracted. Belt 1, 2
forming separated portions 5 of a predetermined length, and configuring the overlapping portions 4 and separating portions 5 to be alternately continuous;
The belt is cut from a predetermined part and used for things such as shock absorbers and safety belts.The belt is woven by a loom and then cut and used as is, so the buffer part (overlapping part 4) is not the same as the conventional one. Since there is no need to sew the threads, production efficiency is greatly improved, and in the weaving process, the weaving method, thickness, number, weaving pattern, arrangement, etc. of the twine warp threads 3 are carefully considered to provide an excellent cushioning effect. can do. In addition, in the separating section 5, the leno warp 3 is distributed and woven into the upper and lower belts 1, 2, so there is no need to cut it at the retracting section unlike in conventional products, which saves time and the ends of the leno warp. It won't come off. Further, by weaving under the same conditions, the same cushioning effect can be obtained no matter which part is used, and it is possible to provide a shock absorber with reproducibility, stable quality, and high safety.
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 impact 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 the worker or user without causing injury. 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. An explanatory diagram showing a conventional product, FIG. 12 is a side view of the belt joining portion of the present invention, and FIG. 13 is a side view of the belt itself, with the belt body cut away. In the figure, 1 is the upper belt, 2 is the lower belt, 3 is the entangled warp, 4 is the overlapping part, 5 is the separation part, 11 is the warp of the upper belt, 12 is the weft, 21 is the warp of the lower belt, 22 is the warp of the lower belt It is also a weft thread.

Claims (1)

[Claims] 1. Weft 12 of upper belt 1 and weft 2 of lower belt 2
2 and 2 are woven by a plurality of entangled warps 3 to form an overlapping part 4, and the entangled warps 3 are divided and woven into the upper and lower belts 1 and 2, respectively, to separate the upper belt 1 and the lower belt 2. At least one polymerization process is performed by cutting arbitrary parts of the overlapping part 4, separating part 5, or both of the belt body in which the overlapping part 4 and the separating part 5 are alternately and continuously woven. Parts 4 and 1
A shock-absorbing belt characterized in that a single belt 101 is provided with at least one separating section 5. 2. The shock absorbing belt according to claim 1, wherein the upper belt 1 and the lower belt 2 are made of twill weave. 3. The 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.
The 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,
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,
The 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. absorption 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. The shock absorbing belt according to item 2, 3, 4, 5, or 6. 8. The shock absorbing belt according to claim 1 or 7, wherein the fibers constituting the upper belt 1 and the lower belt 2 and the entangled warp threads 3 are made of synthetic fibers of the same quality. 9. The shock absorbing belt according to claim 1 or 7, wherein the fibers constituting the upper belt 1 and the lower belt 2 and the entangled warp yarns 3 are made of different synthetic fibers.