JPH0424239A - Webbing for seat belt - Google Patents

Abstract

PURPOSE:To obtain a webbing for seat belt having improved designability without lowering the tensile strength by weaving a specific texture with a warp and a weft having different colors in such a manner as to continuously expose a specific length of the weft on the surface with regard to the warp. CONSTITUTION:A warp and a weft are woven to form a two-up two-down texture or three-up three-down texture. The warp and the weft have different colors. The warp is continuously exposed on the surface of the webbing with regard to the warp within the range of 4 to 8 stitches. Since the webbing for seat belt having the above structure is resistant to the lowering of tensile strength, the thickness of the webbing can be reduced to improve the designability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to webbing for seat belts used in vehicles such as automobiles to protect occupants.

[Conventional technology]

Webbing used in seat belt devices is generally manufactured with a woven structure such as a twill weave using warp threads and weft threads.

In order to improve the design of this webbing, research is being conducted on adding patterns to it. In order to improve the design in this way, there are three ways to improve the design: (1) adding a pattern to the surface of the webbing by printing, (2) forming the pattern by changing the weaving structure, (3) using embroidery or other methods. Means are used to deposit decorations, which are separately formed in a process, onto the webbing.

However, in the case of printing in (1) above, fixing and dyeing are required after printing, and adding other materials such as embroidery in (3) above also requires a large number of man-hours, causing an increase in cost, and the smoothness of the webbing surface. is lost.

In addition, the means for expressing a pattern using the weaving structure in (2) above include: (1) changing the arrangement of warp threads without changing the weaving structure; (2) using warp threads with partially different colors; (2) means for changing the weaving structure of the warp threads; and (2) means for combining two or more of these methods.

However, simply changing the arrangement of the warp threads in (2) above results in a small degree of change and poor design expression.

Furthermore, even if colored threads are used, handling becomes complicated in order to accommodate various colors. In addition, when partially changing the color of the warp yarn mentioned in (1) above, the yarn-dyed yarn shrinks during dyeing, creating a difference in elongation rate with other yarns and causing a decrease in tension. Therefore, the thickness of the webbing increases in order to maintain a predetermined strength. In order to change the weave structure of the warp threads mentioned in (■) above, in addition to the commonly used 2-up-2-down and 3-up-3-down weaves, irregular structures such as 2-up-1-down and 3-up-2-down may be used. Become. Therefore, a difference occurs in the weaving length of the warp yarns, and when tensile stress is applied, cutting starts from a point where the weaving length is small, and the tensile tension decreases. In addition, in order to maintain the required tensile strength, the number of warp yarns used increases and the thickness of the webbing increases.

Furthermore, as a means of (1) above, a weaving structure was created in which warp threads of different colors were used and the way they were arranged was changed.
No. 4-10085), but in this case, black original yarn and non-doped yarn are used as warp yarns. The strength of spun-dyed yarns is several percent lower than that of non-spring-dyed yarns, and in order to maintain the specified tensile strength, the number of warp yarns must be increased compared to when all warp yarns are non-thick yarns, and the webbing thickness must be increased. The thickness becomes several percent thicker. When the thickness of the webbing increases in this way, the diameter of the webbing becomes larger when it is wound onto a take-up device, making the entire take-up device larger, and the take-up spring must be made stronger.

[Problem to be solved by the invention]

The present invention has been made in consideration of the above-mentioned facts, and an object of the present invention is to obtain a webbing for a seat belt which does not have a decrease in tensile strength and has an improved design without the need to increase the wall thickness.

[Means to solve problems]

The present invention is a webbing for a seat belt in which the warp threads are woven with a 2-up-2-down or 3-up-3-down structure with respect to the weft threads, wherein the warp threads and the weft threads have different colors, and the weft threads are of different colors. The webbing is characterized by providing a portion where the yarn continuously appears on the surface of the webbing in a range of 4 to 8 stitches relative to the warp yarn.

In this way, the present invention brings out the diversity of design expression by devising the weaving condition of the weft yarns, and the conventional weaving structure expresses design by changing the weaving structure of the warp yarns. There are significant differences compared to the In other words, when changing the weaving structure of the warp threads or using a different type of warp thread, it is important to ensure that the warp threads are subject to tensile strength, which is the original basic requirement for seat belt webbing. This has the disadvantage that the resistance to tension of the warp threads is not uniform and the tensile strength of the webbing as a whole is reduced. In addition, even in the present invention, it is possible to make a large number of warp yarns different colors, as long as these warp yarns have the same performance such as tensile strength.

The types of warp and weft yarns used in the present invention are not particularly limited, such as multifilament yarns and spun yarns, but the warp yarns can be undyed white yarns that are generally used outside Europe, and the weft yarns can be used. Yarn-dyed yarns, dope-dyed yarns, etc. can be used, and raised mole yarns can also be used. By applying the piece dyeing process after weaving, the weft yarn becomes a color that is a combination of the already colored color and the color added in the piece dyeing process, while the warp yarn is colored for the first time in the piece dyeing process, so The color will be given by the dyeing process. In addition to this, it is of course possible to use warp threads that are colored in advance in a different color from the weft threads, and dyeing after weaving may be omitted. As for the material, conventionally used materials such as polyester nylon can be used for both the warp thread and the weft thread.

The weft yarn of the present invention has a portion that continuously appears on the surface of the webbing in a range of 4 stitches to 8 stitches with respect to the warp yarn, but this continuous portion that appears on the surface of the webbing has 3 stitches.
If it is less than the weft thread, the weft thread will hardly appear on the webbing surface. In other words, unlike ordinary textiles, seatbelt webbing is woven with warp yarns densely woven into weft yarns, so unless four or more weft yarns appear on the surface of the webbing in a row, it is almost impossible to see visually. It turns out you can't do it. Furthermore, if more than 8 stitches are continuously exposed on the surface of the webbing, the weft yarns in this area will not be restrained by the warp yarns, which will be disadvantageous in terms of tensile strength and abrasion resistance in the longitudinal direction of the webbing. . This is because if the restraint at the part where the weft threads continue to emerge from the webbing surface is weak, the weaving length of the warp threads will be uneven, and the weft will be more likely to wear out when it comes into friction with the occupant's clothing.

It is possible for the weft yarn to be continuous in the range of 4 to 8 stitches on the front or back side of the webbing, but considering tensile strength and abrasion resistance, weft yarns can be continuous on the surface of the webbing. It is preferable to provide the exposed portions intermittently in the webbing width direction. In other words, if two parts are provided in the width direction of the webbing that continuously appear on the surface of the webbing with 4 or more stitches and 8 or less stitches, the area between them will appear on the front side and back side of the webbing in the range of 1st stitch to 3rd stitch or less. Preferably, it forms a part.

Furthermore, when the weaving structure of the present invention is other than a plain weave structure, the continuous exposed portion of the weft yarn gradually shifts obliquely toward the webbing width direction in the webbing longitudinal direction.
A pattern in which continuous exposed parts adjacent in the webbing longitudinal direction are grouped together, and this is expressed repeatedly in the webbing longitudinal direction, a second pattern in which continuous exposed parts adjacent in the webbing longitudinal direction overlap in the webbing width direction, and this overlap Various types of third patterns with different conditions can be applied. Furthermore, the number of consecutive exposed portions of the weft yarn can be considered to be 31 in total, with five types of combinations of exposed portions between 4 and 8 being applicable. There are many different combinations of all these.

[Embodiments of the invention]

FIG. 1 shows a first embodiment of the present invention, which is an embodiment of the second pattern described above. In this example, warp yarn A
1 to A6 each consist of two aligned warp threads,
Weft yarns 81 to B4 are woven with these warp yarns. In the diagram, the X mark indicates that the warp thread is on the front side of the webbing (the front side of the page)
, and other blank spaces appear on the back side. Conversely, for weft threads, the x mark appears on the back side of the webbing (towards the back of the page), and the other parts appear on the front side.

Here, the weft yarn B1 extends between the warp yarns A1 to A3,
The weft yarn B4 has six consecutive stitches appearing on the webbing surface between the warp yarns A4 to A6. These continuously exposed parts are shown in outline (the same applies below). Conversely, weft yarn B2 is between warp yarns A4 to A6, and weft yarn B3 is between warp yarn A.
Between 1 and 83, six consecutive stitches appear on the back of the webbing. In areas other than these, two weft threads appear intermittently on the front and back sides of the webbing, but in this area, with seatbelts that are woven with warp threads at high density, only the warp threads are visible on the webbing surface, and the weft threads are visible on the webbing surface. The threads cannot be seen visually.

In this way, the continuously exposed portion of the weft threads appearing on the front or back surface of the webbing consists of the weft threads 81 to B4 and the warp threads A1 to B4.
A complete structure is formed in the range A6, and this becomes one set to form a repeating pattern in the longitudinal direction of the webbing (in the direction of the arrow) and in the width direction (in the direction of the arrow W).

Next, FIG. 2 shows a modified example in which a repeating pattern occurs in the longitudinal direction of the webbing as in the first embodiment, and the warp yarn A1
A complete structure is formed between ~A6 and the weft threads 31 to B4. In this example, the weft yarn B2 appears continuously on the front side of the webbing over 6 stitches in the range of warp yarns A3 to A6 and A1, and the weft yarn B1 continuously appears on the webbing front side over 6 stitches in the range of warp yarns A1 to A3. It's visible on the surface. Also weft thread B
4 is a series of 6 stitches between warp yarns A3 to A6 and A1 on the back side of the webbing, and weft yarn B3 is connected to warp yarns A1 to A1.
Four consecutive stitches appear on the back side of the webbing between A3.

Furthermore, these weft yarns B1 and 82 are warp yarns A1 and A3.
At the intersection with the weft yarns B3 and 34, the warp yarns A
1 and 83, which are adjacent to each other along the longitudinal direction of the webbing.

In addition to the repeating patterns shown in Figures 1 and 2, the second pattern includes various modifications that change the number of consecutively appearing weft threads and the degree to which adjacent weft threads overlap. Examples are applicable.

Next, FIG. 3 shows an example of the first pattern in which the continuous exposed portion of the weft yarn gradually shifts diagonally in the webbing width direction in the webbing longitudinal direction.

In this embodiment, a complete structure is formed by the warp yarns A1 to A6 and the weft yarns B1 to B84, which are aligned two by two. Weft yarns Bl, B2, and B3 are warp yarns A5 to A6 and A3 to A4, respectively.
, four consecutive stitches appear on the front side of the webbing in the range A1-A2. In addition, weft yarns B1 and B3 are warp yarns A1 to B3, respectively.
4 consecutively on the back side of the webbing in the range of A2, A5 to A6
It's visible. Moreover, these weft yarn portions continuously exposed on the front side of the webbing are shifted obliquely so that adjacent weft yarn portions in the longitudinal direction of the webbing do not overlap.

FIG. 4 shows a modification of the obliquely shifting pattern shown in FIG. 3, in which the continuous exposed portion of the weft thread is 6 stitches. Furthermore, in the embodiment shown in Fig. 3, each two warp threads were woven in parallel, but in this embodiment, the weaving structure is such that each warp thread has a different amplifier down position in the adjacent part. There is.

Next, Fig. 5 shows a pattern in which the continuous exposed portion of the weft yarn has a 4th stitch, a 5th stitch, and a 6th stitch, and these are alternately shifted diagonally, and the warp yarn is woven by pulling three stitches in alignment. There are a mixture of woven parts, woven parts made by pulling two strands together, and single woven parts.

In addition to those shown in FIGS. 3 to 5, the number of consecutively exposed portions can be changed from 4 to 8, and various combinations thereof can be used.

Next, FIG. 6 shows an example of the third pattern in which the end of the continuous exposed portion of the weft yarn in the webbing width direction overlaps the adjacent continuous exposed portion of the weft yarn by a glance in the webbing width direction and shifts diagonally. .

In FIG. 7, a pattern is formed by a combination of two overlapping consecutively exposed portions and a non-overlapping portion.

Similar to the variations of the various patterns described above, various modifications of the overlapping condition of the weft thread exposed portions can be considered depending on the number of consecutively exposed stitches and the number of overlapped stitches.

As explained above, the present invention can express many different designs by variously changing the continuous exposed portion of the weft thread.

〔Effect of the invention〕

In the present invention, as mentioned above, only the continuous exposed portion of the weft yarn is provided, and all the warp yarns can be made of the same type, so there is no decrease in the tensile strength of the webbing, and there is no increase in the webbing thickness, resulting in a variety of designs. It has excellent effects that can be achieved.

[Brief explanation of drawings]

FIGS. 1 to 7 are organizational charts showing woven structures to which embodiments of the present invention are applied. A...Warp thread, B...Weft thread.

Claims (1)

[Claims] (1) The warp thread is 2 up or 2 down or 3 against the weft thread.
Seat belt webbing woven with an up-3-down structure, the warp thread and weft thread being different from each other,
A webbing for a seat belt, characterized in that the weft yarn has a portion continuously appearing on the surface of the webbing in a range of 4 to 8 stitches with respect to the warp yarn.