Textiles: weaving – Fabrics – Special shape
Patent
1995-01-05
1997-06-03
Falik, Andy
Textiles: weaving
Fabrics
Special shape
139384R, 139408, 428 361, D03D 100, D03D 1100, D03D 302
Patent
active
056344996
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a belt-like woven fabric which can replace ropes used as a safety belt for work done in high places and ropes used as slings for flexible containers, and so forth.
DESCRIPTION OF RELATED ART
Generally, a safety belt for work done in high places has a construction wherein one of the ends of a rope is fitted to a metal member disposed in a safety belt and a hook or a carabiner is fitted on the other end thereof. In the sling of a flexible container, a rope is connected to a metal member fitted to the main body of the container. To connect the rope to the metal member, it is customary to conduct so-called "Satsuma" processing, i.e., a Japanese term representing an operation to piece together two ends of rope manually. This processing requires a high level of skill and strength. Accordingly, it has become difficult in recent years to secure such skilled labor. In the case of narrow woven fabrics, connection by sewing can be easily accomplished. However, because they are relatively wide, belt-like woven fabrics are inferior to rope in the aspect of handling, and have therefore not been employed.
A prior art reference disclosing a structure analogous to that of the present invention is Japanese Examined Utility Model Publication (Kokoku) No. 62-14137 entitled "Narrow Woven Fabric". This includes a narrow width flat woven structure 81 and a circular woven structure 82. When warps 83 at a peripheral portion are woven by wefts 85 in the circular woven structure 82, part of the warps 84 are used as core yarns, i.e., wadding yarns.
However, this prior art reference is substantially different from the construction of the present invention in the following points, and this technology cannot be employed for the object of the present invention. As described in the specification of this prior art reference, "a part of warps 84 is removed from the woven structure and weaving is done in such a manner that the number of warps to be woven is smaller on the inside of the woven structure than on the peripheral side thereof". The prior art does not weave the wadding yarns in a total denier number of at least 1.5 times the total denier number of the warps of the hollow woven structure as is done in the present invention. As will be later described, the wadding yarns to be woven into the hollow woven structure in the present invention must have at least the volume described above, and if the volume is smaller, the inside of the hollow woven structure will have a large number of spaces, the packing will not be sufficient, and the section will not become circular. Accordingly, the description of the prior art reference reading "the circular woven structure portion has a ropelike configuration, the inside portion of which is solid, and its cross-section is circular", is improbable, although this is difficult to ascertain, because the reference does not include examples; the reason will be explained as follows. FIGS. 5 and 6, for example, show a flat triple weave structure 81 and a circular string portion 82 formed by weaving the second layer of the woven structure 81 and connecting yarns, i.e., stitching yarns as wadding yarns. However, the wadding yarns comprise only one-third of the ground yarns and a very limited number of the connecting yarns. According to the judgement of those skilled in the art, such a structure cannot produce a product which can be used while its section remains circular. Although various problems are left yet unsolved, the reference does not comment on them.
It is an object of the present invention to provide a narrow woven fabric which has a higher strength than a rope having the same mass, has a substantially circular cross-section and replaces a rope. In the present invention, the end portion of this narrow woven fabric is changed into a flat configuration having a wider width and a suitable thickness through the weaving operation, so that connection means by sewing can be employed.
The inventors of the present invention proposed in Japanese Patent Application
REFERENCES:
patent: 4015641 (1977-04-01), Goff, Jr. et al.
patent: 5080142 (1992-01-01), Calamito et al.
Kikuchi Koichi
Watanabe Masao
Falik Andy
Kikuchi Web Tech Co., Ltd.
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