JPH0535870U - Webbing for seat belt - Google Patents

Abstract

(57) [Summary] [Purpose] A product value that uses a general needle loom and maintains the manufacturing cost at the same level as conventional webbing, has high rigidity in the width direction, and does not invert or twist during use. Provide a high-quality seat belt webbing. [Structure] Synthetic fiber multifilament yarn is used for the warp yarn 3 and the weft yarn 4 constituting the main body portion 2 of the seat belt webbing 1, and at least the synthetic fiber multifilament yarn constituting the weft yarn 4 is constituted. A webbing for a seat belt, wherein the constituent single yarn has a fineness of 15 to 100 denier (D).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a seat belt webbing woven using a needle loom, and more particularly, to provide a high quality seat belt webbing that does not cause jamming during use. ..

[0002]

[Prior Art]

 Conventionally, a seat belt webbing is generally woven using a needle loom. Then, for the purpose of enhancing the accommodation capacity in the winding device and effectively utilizing the limited space inside the vehicle, the thickness should be made as thin as possible while satisfying the various characteristics required for the seat belt webbing. It is being sought after.

Therefore, at present, the thickness of the seat belt webbing is considerably reduced as compared with the past by making improvements such as changing the material from conventional synthetic fibers such as nylon and vinylon to polyester synthetic fibers. Is coming. However, on the other hand, if the rigidity in the width direction of the webbing is low, it is expected that the webbing will be twisted at the slip guide part to reverse the webbing or become a string-like shape (jamming phenomenon) depending on the usage conditions. ..

The inverted webbing not only gives the wearer a feeling of discomfort, but may not provide the initial effect during use, and further, the webbing becomes a string at the slip guide portion at the time of collision, The breaking strength may be lower than the set strength. Various proposals have been made so far in order to improve such a defect. For example, in Japanese Patent Application No. 59-263108, two weft needles are used to simultaneously weave two types of weft yarns, a monofilament and a multifilament, to increase the rigidity in the width direction.

However, in this method, it is necessary to specially use a special two-needle loom as a needle loom, and weaving is difficult and is not a general method. There is also a drawback that the thickness becomes thick. On the other hand, in Japanese Patent Application No. 55-22868, the weft is processed with a resin and woven into the weft to increase the rigidity of the webbing in the width direction.

[0006] In such a method, if the degree of resin processing is too high, the weaving property is deteriorated, and since the weft yarn is twisted or processed into resin, the cost is high, which is not preferable.

[0007]

[Problems to be solved by the device]

 The object of the present invention is to improve the above-mentioned drawbacks of the conventional technology and to increase the rigidity in the width direction while using a general needle loom while maintaining the manufacturing cost at the same level as the conventional webbing, and It provides high-value-seat webbing for seat belts that is resistant to inversion, twisting and jamming.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention adopts the technical configurations as described below. That is, a seat belt webbing woven using a needle loom, wherein a synthetic fiber multifilament yarn is used for the warp and the weft constituting the seat belt webbing, and at least the weft is formed. The synthetic fiber multifilament yarn is a webbing for seat belts in which the fineness of each constituent single yarn is 15 to 100 denier (d), preferably 15 to 50 denier (d).

[0009]

[Action]

 Since the seat belt webbing according to the present invention is manufactured using the above-described technical structure, it is a constituent fiber with a large single fiber fineness that has never been used as a weft yarn for a seat belt webbing. Since it is woven using a multifilament consisting of, the seat belt webbing exhibits good handling properties as a whole, while the seat belt webbing exhibits a predetermined rigidity in the width direction. It is possible to exhibit an excellent effect that there is little risk of curving in the width direction, inversion or twisting during mounting.

[0010]

【Example】

 Hereinafter, specific examples of the seat belt webbing according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a conceptual view showing a specific example of a method for manufacturing a seat belt webbing by a needle loom according to the present invention, and FIGS. 2 and 3 are first and second seat belt webbing according to the present invention. It is the figure which showed an example of the 2 woven structure.

A method for forming the first woven structure will be described below with reference to FIGS. 1 and 2. A. The needle loom inserts the weft yarn 3 into the opening 8 of the warp yarns 2 and 2'from one side of the fabric 1 by the weft needle 4. B. The inserted weft yarn 3 is locked at the position exiting the opening 8 together with the separately-provided anti-ravel yarn 6 on the hook 7 of the knitting needle 5, and then retracts the knitting needle 5.

Therefore, two wefts 3 are simultaneously woven by inserting the weft needle 4 once. C. The knitting needle 5 retreats in the front loop 12 formed by the weft yarn 3 and the anti-ravel yarn 6, and forms a new loop 13 to form a knitting ear 10 formed of stitch loops. By repeating this series of operations, the woven structure shown in FIG. 2 is woven.

Therefore, the conventional woven selvage 11 is formed on one selvage (one selvage / weft needle insertion side) of the fabric, and the other selvage is formed on the knitting selvage. A method of forming a second weaving structure for a seat belt webbing according to the present invention will be described with reference to FIGS. 1 and 3. A. The needle loom inserts the weft yarn 3 into the opening 8 of the warp yarns 2 and 2'from one side of the fabric 1 by the weft needle 4.

B. When the inserted weft yarn 3 is at the position exiting the opening 8, the knitting needle 5 enters the space 22 between the weft yarns 3 inserted between the warp yarns in a folded shape, and the loop yarn is separately supplied. 20 is hooked on the knitting needle 5 and retracted. The loop yarn 20 is retracted so as to lock the weft yarn 3, and at this time, the knitting needle 5 is also retracted by hooking the separately provided fray stop yarn 21 on the hook portion 7 of the knitting needle 5.

As with the first weaving structure, two wefts 3 are simultaneously woven by inserting the weft needle 4 once, as in the first weaving structure. C. The knitting needle 5 retreats in the previous loop 23 formed by the loop yarn 20 and the anti-ravel yarn 21, and forms a new loop 24 while forming a knitting ear 10 1 formed of stitch loops.

By repeating this series of operations, the woven structure shown in FIG. 2 is woven. Therefore, one of the ears of the woven fabric (one ear / the side into which the weft needle is inserted) has the conventional woven ears 11, and the other has the knitting ears. This is the same as in the case of No. 1 woven structure. However, the difference from the case of the first weaving structure is that the knitting selvage is formed by the loop yarn 20 and the anti-raveling yarn 21, and the portion 25 of the weft yarn 3 locked to the loop yarn 20 is Since it is drawn inside the fabric close to 10, it is not visible from the surface.

Synthetic fiber multifilament yarns are used for the warp yarns 2 and the weft yarns 3 constituting the seat belt webbing 1, and at least the respective constituents constituting the synthetic fiber multifilament yarns constituting the weft yarns 3. A webbing for a seat belt is shown in which the fineness of a single yarn is 15 to 100 denier (d). The weaving structure of the main body 1 in the seat belt webbing according to the present invention is not particularly limited, but in the illustrated example, it is composed of a 2/2 twill structure in which two wefts are simultaneously drawn in. An example is shown.

The warp 3 constituting the main body of the webbing for a seat belt in the present invention is composed of multifilament yarn composed of synthetic fiber, and the kind of synthetic fiber is particularly specified. However, it is preferable to use, for example, a polyester-based synthetic fiber by comprehensively judging from the strength, elongation, texture, dyeability, abrasion resistance and the like.

Further, the fineness of the warp is not particularly specified, and may be determined in consideration of required properties such as strength and elongation, but it is usually 1000 to 1500 denier (D) multifilament. Thread is used. Further, the warp yarn 2 in the seat belt webbing of the present invention usually has a total denier of 330000D to 500,000D, and the fineness thereof is determined according to demand.

The weft thread 3 that constitutes the main body 1 of the seat belt webbing of the present invention is not particularly limited, but for the above reason, it is preferable to use, for example, a polyester-based synthetic fiber. The single yarn fineness of the weft yarn is in the range of 15 denier to 100 denier, and preferably 15 to 50 denier. Since two such weft yarns are woven together, it is preferable that the weft yarn has a fineness of about half that of the warp yarn. The woven structure configured in this manner can maintain the balance of the warp. Becomes

Therefore, it is preferable to use the weft having a fineness of, for example, about 500 denier or 750 denier. The density of the weft has a balance with the woven structure and the fineness of the warp, but is generally selected from the range of 20 to 28 Pics / 30 mm. From the standpoint of rigidity in the weft direction, it is preferable that the number of wefts to be driven in is large, but the tensile breaking strength decreases as the weft density increases, so it is determined according to the priority characteristics.

At present, a plurality of types of seat belt webbings currently produced in Japan are obtained, and the weft yarns used in the webbings are investigated. (Hereinafter, total denier is represented by D, single yarn fineness is represented by abbreviation, and filament number is represented by abbreviation of f.) All the webbings investigated were polyesters. The used weft threads are 500D-48f (10.42d), 500D-96f (5.21d), 630 D-72f (8.75d), 630D-96f (6.56d), 750D-72f (10. 42d) and 750D-96f (7.81d). The apparent fineness is thicker because they are all dyed and finished, but the fineness of the raw yarn is estimated based on the yarn types marketed by the raw yarn manufacturer. The numbers are actually measured numbers. The values in parentheses are the denier of single filament filament rounded off to the third decimal place. As can be seen from this, single filaments thicker than 10.42d are not used. The above-mentioned thick single-filament filament of 10.42d or more was not commercially available from the yarn manufacturer. The following points can be cited as reasons why it was not marketed.

In the case of weaving with a needle loom, it is a general method to insert a weft between warps with a weft needle and to form a weaving loop together with the anti-raveling yarn with a weaving needle (latch needle). .. It has been considered by the person skilled in the art that if the weft single yarn denier is thick, it is difficult to form a knitting loop or the knitting loop does not adhere to the warp ends. In other words, it can be said that it was not made because there was no request.

From the above structure, the inventors of the present invention use a weft composed of a thick monofilament filament in order to increase the rigidity in the width direction of the webbing. And, the effect was confirmed by the following experiment, and the present invention was conceived. For the weaving in the following experiments, all polyester yarns were used and the weave design was 2/2 twill. The example uses a weft yarn of a thick single-filament filament which has not been used conventionally, and the comparative example uses a weft yarn of a single-filament filament thickness used in a conventional product. The results are shown in Table 1.

[0025]

[Table 1]

The weaving was performed with the same degree of care as in the adjustment in the normal work. The appearance is mainly the difference in the size and tightening of the knitting loop. And the judgment is such a slight difference that can be seen by those skilled in the art and is not distinguishable by a general user. As shown in the table, weaving and appearance were unexpected, and it was found that the single-filament filaments up to about 25d can be used in the same manner as conventional wefts. Furthermore, for those with a slightly poor weavability and appearance, a knitting loop (especially with a single yarn filament of 50D of Example 4) is fed separately from the ordinary weft and anti-raveling yarn loops. A loop was made with a special thread and an anti-raveling thread, and the weft thread was held by the loop thread and woven so as not to be exposed on the knitting ear side, and weavability and the appearance of the product did not have any problems. (Example 5) In the comparative experiment, the weave design of each of the examples and the comparative examples was a twill weave of 2/2, and the width of the webbing of the dyed processed book was about 49 mm in each case. ..

Further, in the above, for the purpose of comparing the effect of the filament single yarn thickness of the weft, the warp fineness and the number are unified to 325 of 1260D, and the fineness and density of the weft are also 23 picks at 500D, In 750D, it is unified to 22 picks. The knitting loops of Examples 1 to 4 and Comparative Examples 1 and 2 were woven by the method shown in FIG. 2 in which a knitting loop was formed with a weft and an anti-ravel yarn.

In the fifth embodiment, eight 500D selvages and eight 250D selvages are arranged on the outer side of both ears of the webbing warp main body 1 at 1260D, and the knitting type is a loop thread. The weft yarn was manufactured by the method shown in FIG. The knitting ear of such a structure is called a so-called soft ear, and its detailed forming method is described in, for example, Japanese Utility Model Publication No. 2-43894 or Japanese Utility Model Publication 3-1493.

The weaving experiment was not conducted for single yarn filaments having a filament diameter of 50 d or more because the raw yarn could not be prepared, but for reference, 5 monofilament yarns equivalent to 100 d were used as weft yarns. And woven according to Example 5. As a result, there were no problems in weavability and appearance at the beginning of weaving, but as weaving proceeded, both of them gradually became defective. This is because there is a problem in the alignment method, and if the yarn manufacturer supplies a yarn of 500D-5f, it can be woven without problems and it can be presumed that the appearance could be maintained in a good starting condition. However, when the portion where the weft yarns on the weave side are exposed is enlarged and viewed in detail, the state of convergence of the filaments is slightly unsatisfactory as compared with Example 5, and the hand feels somewhat hard, so the single yarns A filament having a filament diameter of 100 d or more was judged to be unfavorable.

The hardness in the width direction was measured by the so-called Gurley method (see 6.20 “Bending Repulsion” A Method of JIS L1096 “General Fabric Test Method”). The higher the measured value, the higher the rigidity. As shown by the measured values, as compared with the measured values of the conventional product, naturally, the thicker the single yarn filament of the weft, the higher the hardness. Of the various properties required for seat belt webbing, a confirmation test was also conducted on breaking strength, elongation, and wear resistance, which are particularly important and are presumed to be affected by weft yarns. The results of the test were within the range of normal variation and there was no significant difference.

[0031]

[Effect of the device]

 The seatbelt webbing according to the present invention has a higher rigidity in the width direction than the conventional seatbelt webbing while using a general needle loom and the manufacturing cost is substantially the same as the conventional one. Therefore, compared to the conventional seat belt webbing, the occurrence of twisting and reversal during use is significantly reduced, and it is possible to obtain a seat belt webbing that is unlikely to become a string at the slip guide part during a collision. It was.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a specific example of a method for manufacturing a seat belt webbing by a needle loom according to the present invention.

FIG. 2 is an enlarged view showing a first weaving structure with a structure of an ear portion in the method for manufacturing the seat belt webbing shown in FIG.

FIG. 3 is an enlarged view showing a second weaving structure with a structure of an ear portion in the method for manufacturing the seat belt webbing shown in FIG. 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Webbing for seat belt, main body 2, 2 '... Warp 3 ... Weft 4 ... Weft needle 5 ... Knitting needle 6 ... Anti-fray thread 7 ... Hook portion 8 ... Warp opening 10 ... Ear portion, knitting ear portion 11 ... Ear Part, weaving part 12 ... Front loop 13 ... New loop 20 ... Loop yarn 21 ... Fray stop yarn 22 ... Weft gap 23 ... Front loop 24 ... New loop 25 ... Part where weft is locked to loop yarn

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shigeji Ogata 3-9-24 Teraonishi, Ayase City, Kanagawa Prefecture

Claims (2)

[Scope of utility model registration request] 1. A seatbelt webbing woven using a needle loom, wherein a synthetic fiber multifilament yarn is used as a warp and a weft constituting the seatbelt webbing, and at least the weft. A webbing for a seat belt, wherein the fineness of each constituent single yarn constituting the synthetic fiber multifilament yarn constituting the above is 15 to 100 denier (d). 2. The webbing for a seat belt according to claim 1, wherein each of the constituent single yarns constituting the synthetic fiber multifilament yarn constituting the weft yarn has a fineness of 15 to 50 denier (d).