JPH04136231A - Woven belt material for safety belt and preparation thereof - Google Patents

Abstract

PURPOSE: To obtain a safety belt for vehicles and the like by providing upper and lower gaps prior to threading corresponding wefts and also an intermediate gap therebetween for antistatically finished yarn(s) and introducing the antistatically finished yarn(s) into the intermediate gap. CONSTITUTION: The subject weaving belt material as a safety belt intended for vehicles and the like and containing carbon-contg. antistatically finished yarn(s) extending along warps by the following procedure: in a belt weaving apparatus which is actuated by two weft threading means, prior to weft threading operation each time, an upper gap for threading one of wefts, i.e., an upper weft, and a lower gap for threading the other weft, i.e., a lower weft, are provided respectively; furthermore, an intermediate gap is provided between the upper and lower gaps for threading antistatically finished yarn(s), which is (are) then introduced at an invariant height into the intermediate gap.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a safety belt for vehicles and a method for manufacturing the same.

[Prior Art] Specifically, the present invention relates to a woven belt material for a safety belt for a vehicle, etc., including at least one antistatic textured yarn extending in the warp direction, and a method for manufacturing the same.

In vehicle safety belts, weaving one or more antistatic threads together in the warp direction is
It is publicly known. Antistatic textured yarns are used to distribute the charge evenly throughout the belt material. Charges are generated primarily at friction points or attachments at the turning points of safety belts, but also on parts of the wearer's clothing, such as buttons, buckles, and the like. In the case of a belt material without antistatic yarn, the charge is localized and dust is attached to these locations by electrostatic adsorption. In order to avoid this, it is known to incorporate antistatic textured yarn.

Since the antistatic textured yarn distributes the charge uniformly throughout the belt, no particularly high charge is generated locally, but only a relatively low charge distributed throughout the belt. As a result, the adsorption of dust particles is significantly reduced and, in particular, strong accumulations of dust at some locations are avoided.

[Problems to be Solved by the Invention] In known belt materials, antistatic textured yarns are woven as warp yarns, but this means that the charged textured yarns appear alternately on the front and back sides of the belt. . This is undesirable in terms of the appearance of the belt, since charged yarns generally have a color or luster that stands out from normal warp yarns.

An object of the present invention is to make the electrically charged yarn normally invisible from the outside in such a safety belt for vehicles.

[Means for Solving the Problem] This problem is solved according to the present invention by:W claims 1 to 5.

That is, the present invention relates to a woven belt material for a safety belt for a vehicle, etc., which includes at least one antistatic yarn extending in the warp direction.

a) A belt material woven by two weft insertion means arranged in an overlapping manner above and below has an upper weft and a lower weft.

b) To provide a woven belt material characterized in that at least one antistatic textured yarn is extended between an upper weft and a lower weft without intersecting with each other.

Furthermore, the present invention provides a method for weaving a woven belt material for an automobile safety belt, which includes at least one carbon-containing antistatic yarn extending in the warp direction.

a) In belt weaving machines operating with two weft thread insertion means, before each weft thread insertion, the upper gap is opened for the insertion of one weft thread, the upper weft thread, and the lower space is opened for the insertion of the other weft thread, the lower weft thread. Form each void.

b) For at least one antistatic textured yarn.

forming an intermediate void between the upper void and the lower void;
A weaving method is provided, characterized in that the antistatic textured yarn is introduced into this intermediate gap at a constant height position.

The belt according to the present invention, in which the charged yarn is no longer visible from the outside, has two weft thread passing members (shuttle or weft thread passing needle 5ch).
one weft, or upper weft, is inserted into the void above the warp (the shed or needle thread), and the other weft, or lower weft, is simultaneously inserted into the void below the warp (the shed or needle thread). ). In the woven belt, the at least one antistatic textured yarn is between the upper and lower wefts, but is not woven vertically in an undulating manner, alternating with these wefts. According to the manufacturing method according to claim 5, an immovable intermediate gap is formed below the upper gap and above the lower gap for the antistatic textured yarn, so that the antistatic textured yarn can be inserted into the weft threading member. (shuttle or needle)
reliably protected against contact with

According to the present invention, the antistatic textured yarn extends as a warp between the upper and lower wefts in the belt material, but is not interwoven with these wefts alternately. ,
The antistatic textured yarns extend through the belt material in an approximately straight manner, without the undulating or wavy configuration characteristic of interwoven warp yarns, or in any case.
It has a significantly flattened undulating or wavy shape.

According to this manufacturing form, damage to the antistatic textured yarn during weaving can be reliably avoided. This is particularly important when using very fine antistatic textured yarns.

According to the present invention, very fine antistatic textured threads can be introduced into the belt material without damage.

However, since the antistatic textured yarn cannot be seen from the outside, an antistatic textured yarn that is substantially thicker than what has been used up to now may be used, if desired, in consideration of the appearance of the belt material.

Preferred embodiments of the invention are set out in claims 2-4.

The antistatic textured yarn can be made conductive by containing carbon, which is advantageous in terms of processing (Claim 2). Antistatic treated yarn.

Threads made of synthetic fibers such as polyamide may also be used. Each fiber may be provided with an outer section portion made of carbon (j1! claim 3) or with a core portion made of carbon (claim 4). In that case,
Each fiber consists only of a small portion of its cross-section of carbon and a large portion of its cross-section of an essentially resistant polyamide.

The configuration according to claim 3 is also included in the present invention.

Since the antistatic textured yarn is not exposed to the outside and is not woven in alternately crossing the weft yarns, the object of the present invention can be fully achieved. In addition, according to claim 4, the carbon conductive layer is completely protected.

Next, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

[Example 1] FIG. 1 shows a fragment of belt material, designated as a whole by the reference numeral 2, which has warp threads 4.

It has an upper weft 6 and an upper weft 8. The upper weft 6 is inserted by an upper weft insertion means (shuttle or weft insertion needle), and the upper weft 8 is inserted by an upper weft insertion means.

Depending on the method of shaft control, 2/2 (i.e. two wefts at the top and two at the bottom of the warp) twill
rbindUng) organization is achieved.

There is one antistatic textured yarn between the two warp yarns 4. The antistatic textured yarn 1o does not follow the course of the warp threads, as is particularly clearly shown in FIG.

FIG. 2 shows the state of the upper weft 6 and the upper weft 8. The upper weft 6 and the upper weft 8 are connected to the warp 4a and the warp 4a.
The warp threads 4b are interwoven with the warp threads 4b, which are indicated by broken lines and arranged behind the warp threads 4b. Each warp 4a, 4b
appear alternately on the upper side and the lower side, as is customary. The warp threads 4a, 4b thus form the outer surface of the belt.

The charged yarn 10 is between the upper weft 6 and the upper weft 8,
It lies in the intermediate plane of the belt material 2 when laid flat, or more generally in the central plane of the belt material 2. Therefore, the antistatic textured yarn 10 cannot be visually recognized from the outside. Although the antistatic textured yarn 10 is not woven by intersecting the warp yarns alternately,
In the vertical direction by the weft thread 6.8 and in the horizontal direction in FIG.

In FIG. 2, the belt material 2 is firmly held in its predetermined position by two adjacent warp threads 4a and 4b woven in an undulating or wavy shape in the front-rear direction.

As is known, three to five antistatic textured threads IO are distributed in the width direction of the belt material 2, but a good effect can also be achieved with one antistatic textured thread 10. Each antistatic textured yarn IO generally consists of a large number of fibers, for example 12, but may also be a monofilament yarn consisting of only - fibres.

FIG. 3 shows the cross-sectional shape of a fiber 11a of the antistatic processed yarn.The main part of the fiber 11a is made of synthetic fiber such as polyamide, and has a section part 14 made of carbon on the outside. There is.

FIG. 4 shows the cross-sectional shape of another fiber 11b of the antistatic textured yarn, the main part 1B of which is made of synthetic fiber 1, such as polyamide, and has a tubular core part 1B made of carbon. ing. The main portion 1B contains finely distributed carbon particles, so the fiber 11
b, thus ensuring that the antistatic textured yarn exhibits electrical conductivity also on its outer surface.

As a modification, the antistatic processed yarn may be made of fibers made of synthetic resin such as polyamide, and carbon fine particles may be distributed over the entire cross section.

[Brief explanation of drawings]

FIG. 1 is a schematic top view showing the left edge region of the belt incorporating the antistatic textured yarn, FIG. 2 is a schematic longitudinal sectional view of the belt in the region including the antistatic textured yarn, and FIG. FIG. 4 is a cross-sectional view of two different fibers of antistatic textured yarn.

Claims (1)

[Scope of Claims] 1) A woven belt material for safety belts for vehicles, etc., including at least one antistatic treated yarn extending in the warp direction, comprising: a) two weft yarns arranged in a vertically overlapping manner; The belt material woven by the insertion means has an upper weft and a lower weft, and b) at least one antistatic treated yarn extends between the upper weft and the lower weft without intersecting with each other. A woven belt material characterized by 2) The woven belt material according to claim 1, wherein the antistatic textured yarn contains carbon. 3) The woven belt material according to claim 2, wherein the antistatic textured yarn has a synthetic fiber having a carbon section on the outside. 4) The woven belt material according to claim 2, wherein the antistatic textured yarn includes synthetic fibers containing dispersed carbon particles and having carbon in the core. 5) A method for weaving a woven belt material for safety belts for vehicles, etc., comprising at least one carbon-containing antistatic textured yarn extending in the warp direction, comprising: a) a belt weaving device operated by two weft insertion means; , before each weft thread insertion, an upper gap is formed for the insertion of one weft yarn, that is, the upper weft thread, and a lower gap is formed for the insertion of the other weft thread, that is, the lower weft thread; b) at least one weft thread; A weaving method characterized in that an intermediate gap is formed between the upper gap and the lower gap for the antistatic textured yarn, and the antistatic textured yarn is introduced into this intermediate gap at a constant height position. .