JP2002038356A - Quadraxial woven fabric and method for weaving the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new quadraxial woven fabric having no difference between the face and the back, and to provide a method for weaving the same. SOLUTION: In this quadraxial woven fabric, the face and the back of the fabric are each composed of diagonal threads 3, 4, the interlayer is composed of the weft 2, and the warp 1 is entwined with the diagonal threads 3, 4 of the face and the back, so that the weaves on the face and the back show the same weave pattern. The method for weaving the quadraxial woven fabric comprises making the face 11 made of a diagonal thread surface and the back 12 made of another diagonal thread surface always form a picking shed 13 for the weft 2 by use of a pair of diagonal thread-traversing means 10 so that the face and the back of the fabric are each composed of diagonal threads 3, 4, then picking the weft 2 into the shed 13 so that the intermediate layer C is formed, and further entwining the warp 1a, 1b with the face 11 or the back 12 composed of the diagonal threads by use of healds 14 for the warp of the face or healds 15 for the warp of the back so that the quadraxial woven fabric shows the same weave on the face and the back.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel four-axis woven fabric having no woven fabric and a method for weaving the same.

[0002]

2. Description of the Related Art A four-axis woven fabric is a woven fabric in which two-way slack yarns intersecting in a bias direction overlap with a warp yarn and a weft yarn. Such a woven fabric is a stable woven fabric having less directionality of elongation as compared with a normal biaxial woven fabric, and has recently been receiving attention in various fields. The present inventors have also been working on the development of a four-axis woven fabric and its loom from early on, and have disclosed JP-A-63-92751, JP-A-64-52847, and JP-A-1-29-29.
No. 2140, JP-A-2-6649, JP-A-4-91255, JP-A-8-1
No. 34738, Japanese Patent Application Laid-Open No. 8-134747, etc. have made many proposals for these techniques.

[0003] For the four-axis woven fabric, see, for example,
As shown in No. 2751, and as shown in FIG. 11 described later, the weaving structure is such that a straight thread is woven on only one surface of a conventional biaxial woven fabric. Therefore, a slack yarn was formed on the surface of the woven fabric, and a weft yarn was formed on the back surface, and the warp yarn was entangled by the warp yarn heald.

[0004]

For this reason, the texture differs between the front and back of the woven fabric, and it is necessary to be aware of the difference between the front and back of the woven fabric, causing inconvenience. Therefore, a new four-axis woven fabric having no woven fabric and a weaving method have been studied.

[0005]

The structure of the four-axis woven fabric proposed in the present invention is as follows. First, the front and back surfaces of the woven fabric are formed by slack yarn, the intermediate layer is weft yarn, and the warp yarn is formed by the front and back surfaces. This is a four-axis woven fabric in which the front and back textures are the same weaving texture entangled with the slack yarn.

In this weaving method, in order to form the front surface and the back surface of the woven fabric with the slant yarn, respectively, the front slant yarn surface and the reverse slant yarn surface are always formed by a set of slant yarn traversing means. The warp yarn is injected into the opening to form an intermediate layer, and the warp yarn is entwined with the warp yarn healds on the front and back sides to the front and back slack yarn surfaces to form the front and back texture. Are the same fabric.

[0007] Specifically, the opening of the warp yarn heald on the front side and the back side injects a weft yarn for each opening, and the warp yarn is entangled with the front and back sides of the slack yarn surface. The fabric has the same structure.

[0008] In addition, the opening of the warp yarn heald on the front side and the back side is obtained by inserting a weft yarn at every alternate opening of both sides, and even if the warp yarn is entangled with the front and back side slack yarn faces, Can be the same.

[0009] As a quadriaxial woven fabric having the same weaving structure as the second front and back texture, the front and back surfaces of the woven fabric are formed by weft yarns in reverse to the above-described woven fabrics, and the intermediate layer is a slack yarn. There is a structure in which the yarn is entangled with the weft on the front and back sides.

In the weaving, the front and back flanks are alternately rocked by a pair of flanking yarn traversing means and a warp heald in order to form the front and back surfaces of the fabric with weft yarns. Surface is always on the opposite side of the weft inject opening, and while the weft is injected into the opening to form the front and back weft surfaces, the warp This is a method for weaving a four-axis woven fabric in which the yarns are entangled with the weft surfaces of the front and back to make the above-mentioned front and back texture the same.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a four-axis woven fabric according to the present invention. FIG. 1 is a plan view showing the weave structure of the four-axis fabric, and FIG. 2 is a cross-sectional view showing the same weave structure on the front and back of the four-axis fabric. 3 and 4 are cross-sectional views showing the deformed structure of FIG. FIG. 5 is a main part side view showing the layout and movement of a loom for weaving these. FIG.
And FIG. 7 is a front view of an intermediate omission showing transfer means between the transfer rolls of the slack yarn.

FIG. 8 is a cross-sectional view showing the same weaving structure of the front and back sides of a four-axis fabric showing another embodiment. 9 and 10 are side views showing the layout and movement of a loom for weaving these fabrics. FIG. 11 is a sectional view showing the weaving structure of a conventional four-axis woven fabric.

First, an example of a four-axis woven fabric obtained by the first weaving method will be described. As shown in FIG. 1, a four-axis woven fabric is formed by the slack yarns 3 and 4 perpendicular to the bias direction with respect to a normal biaxial woven fabric composed of a warp yarn 1 and a weft yarn 2. The woven fabric of the present invention has a surface side A
And the back side B are formed with slug yarns 3 and 4, respectively, the intermediate layer C is the weft yarn 2, and the warp yarn 1a or 1b is entangled with the weft yarn 2 and the slug yarns 3 and 4 on the front and back sides. Are the same weaving organization.

In the case of FIG. 2, the warp yarn 1a or 1b is passed between all the weft yarns 2 so that
4, the warp yarn 1 can be entangled in various ways. FIGS. 3 and 4 are examples, and FIG. 1 is a plan view of the structure of FIG. 3. In this case, the warp yarn 1 is alternately entangled with only one of the slack yarn 3 or 4 and the weft yarn 2. Organization. Therefore, it differs from FIG. 2 in that every other weft yarn in a free state that does not become entangled with the warp yarn 1 exists. FIG. 4 shows a slightly complicated structure, and the warp yarn 1a or 1b has a weft yarn 2 and a slack yarn 3 or 4 at every other weft yarn.
It is an organization in which is entangled alternately. Each of these structures has the same weaving structure on both sides.

Such a weaving method for a four-axis fabric can be operated by the layout and movement of the four-axis loom. FIG. 5 is an example of this, in which the front slant yarn surface 11 and the reverse slant yarn surface 12 are always formed by the weft yarn 2 by one set of slant yarn traversing means 10 so that the front and back surfaces of the woven fabric are formed by slant yarn. Launch opening 13
While the weft yarn 2 is being injected into the opening 13 to form the intermediate layer C, the warp yarns 1a and 1b are turned by the warp yarn healds 14 and 15 on the front and back sides. Thread name 1
The fabric on the front and back is the same fabric entangled with 1,12. here,
The structure of one set of the slack yarn traversing means 10 is characteristic, and a dividing plate 18 is provided between the front slant yarn transferring roll 16 and the back slant yarn transferring roll 17 to always secure the injection opening 13 of the weft yarn 2. Like that. Therefore, it is only necessary to run the warp yarn healds 14 and 15 on the front side and the back side within the range of the opening 13 as shown in the figure, and there is an advantage that only one shuttle or rapier 19 is required.

More specifically, the openings of the warp yarn healds 14 and 15 on the front side and the back side are both made to travel greatly to points D and E outside the front slant yarn surface 11 and the back slant yarn surface 12, respectively. When one weft is injected each time the warp healds 14 and 15 reciprocate once, and a weft is driven in with a pullout, the warp yarn is entangled with the front and back side slack yarn surfaces. The fabric on the front and back shown is the same fabric. Here, if the insertion of the weft yarn 2 is set to two every one reciprocation, the warp yarn becomes entangled with every other weft yarn as shown in FIG. 3, and a free weft yarn appears alternately. .

Further, in order to obtain a structure as shown in FIG. 4, the openings of the warp yarn healds 14 and 15 on the front side and the back side are formed by inserting two weft yarns at every alternate opening of both. Then, the warp yarn is entangled alternately with the weft yarn and the front and rear slug yarn surfaces to make the front and back structures identical. Any of the woven structures shown in FIGS. 2 to 4 can be woven by the loom shown in FIG.

In FIG. 5, transfer rolls 16,1
The space between the rolls 7 is opened by the dividing plate 18 to always secure a space for the rapier 19 to be inserted. For this purpose, a means for transferring the slack yarn between the transfer rolls is required. This transfer means has little effect on the size of the width of the dividing plate 18. For example, it is forcibly fed by an oscillating lever 20 as shown in FIG. 21 may be provided so that the slug yarn moves naturally along the slope.

Next, as a four-axis woven fabric having the same weaving structure as the second front and back texture, as shown in FIG. There is a structure in which the intermediate layer C is a crossing surface of the slug yarns 3 and 4 and the warp yarn 1 is entangled with the weft yarns 2a and 2b on the front surface and the back surface. This texture can be woven with only one set of warp healds 14 as shown in FIGS.

That is, in order to form the front and back surfaces of the woven fabric with the weft yarns 2 respectively with the layout and movement looms shown in FIGS. 9 and 10, one set of the slack yarn traversing means 10 and the warp yarn heald 14 are used. Of the weft thread 2 is always in the opening of the weft thread 2
13, the warp yarn 2 is injected into the opening 13 to form the front and back weft yarn surfaces, and the set of warp yarns 1 is used to insert the warp yarn 1 into the front and back. The weft yarn surface is entangled so that the fabric on the front and back illustrated in FIG. 8 is the same fabric. In this case, one set of slug traverse means 10
Requires a mechanism for alternately swinging the entire body with the warp thread heald 14, but this is not technically particularly complicated.

Thus, in the example of the conventional weaving structure with front and back, as shown in FIG.
The weaving machine has the same structure as that shown in FIG. 9 except that the weft yarn 2 is on the back surface. The loom in this case has the same layout as that of FIG. Since the weft thread is driven only below the slack thread surface, the only difference is whether the slack thread traverse means 10 is rocked or fixed.

FIG. 8 shows the structure of a four-axis woven fabric woven by a mechanism in which the entire set of slug traverse means 10 swings alternately with the set of warp healds 14.
Using two sets of warp healds as shown in FIG.
In the same manner as above, the other is entangled with upper and lower slack yarn only,
The fabric on the front and back is the same fabric. Further, two sets of warp yarn healds may be simultaneously or alternately entangled with the warp yarn and the slack yarn. In short, as long as the front surface A and the back surface B of the woven fabric are formed by the surface of the weft yarn 2 and the intermediate layer C is the crossing surface of the slug yarns 3 and 4, as long as the warp yarn is regularly entangled, The fabric on both sides is the same fabric.

[0023]

As described above, the present invention discloses a novel four-axis woven fabric having no woven fabric front and back and an efficient weaving method thereof. By these techniques, the texture differs between the front and back of the woven fabric. As with the conventional four-axis fabric, the convenience of working can be obtained without having to be aware of the difference between the front and back sides when using. Therefore, the handling of the product has become extremely simple.

[Brief description of the drawings]

FIG. 1 is a plan view showing the weaving structure of a four-axis woven fabric.

FIG. 2 is a cross-sectional view showing the same weave structure on the front and back of a four-axis woven fabric.

FIG. 3 is a cross-sectional view showing another deformed structure of FIG. 2;

FIG. 4 is a cross-sectional view showing another deformed structure of FIG. 2;

FIG. 5 is a side view of a main part showing the layout and movement of a loom for weaving the four-axis fabric of FIGS. 2 to 4;

FIG. 6 is a front view of an intermediate omission showing transfer means between transfer rolls of the slack yarn.

FIG. 7 is a front view of an intermediate omission showing transfer means between transfer rolls of the slack yarn.

FIG. 8 is a cross-sectional view showing the same weaving structure of the front and back sides of a four-axis woven fabric showing another embodiment.

FIG. 9 is a sectional view of a main part showing a layout and movement of a loom for weaving the four-axis fabric of FIG. 8;

FIG. 10 is a sectional view of a main part showing a layout and movement of a loom for weaving the four-axis fabric of FIG. 8;

FIG. 11 is a cross-sectional view showing a weaving structure of a conventional four-axis woven fabric.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Warp thread (1a, 1b) 2 Weft thread 3 Slack thread 4 Slack thread 10 Slack thread traversing means 11 Front slant thread face 12 Back slant thread face 13 Weft thread injection opening 14 Front side warp thread heald 15 Back side warp thread Heald 16 Front side slack yarn transfer roll 17 Back side slant yarn transfer roll 18 Divider 19 Rapier 20 Swing lever 21 Slope of divider end face

Claims (6)

[Claims] 1. A fabric in which the front and back surfaces of a woven fabric are respectively formed with slug yarns, the intermediate layer is a weft yarn, and the warp yarns are entangled with the slant yarns on the front and back surfaces so that the front and back fabrics have the same weave structure. Shaft fabric. 2. In order to form the front surface and the back surface of the woven fabric with the slant yarn, respectively, the front slant yarn surface and the back slant yarn surface always form a weft yarn injection opening by a set of slant yarn traverse means. A warp yarn is injected into the opening to form an intermediate layer, and the warp yarn is entangled with the warp yarn healds on the front surface and the back surface so as to entangle the obverse and reverse slant yarn surfaces. A method of weaving a four-axis woven fabric having the same fabric. 3. The opening of the warp yarn heald on the front side and the back side is made by inserting a weft yarn at each opening, and the warp yarn is entangled with the front and back sides of the slack yarn surface to form the same fabric on the front and back. The method for weaving a four-axis woven fabric according to claim 2. 4. The opening of the warp yarn heald on the front side and the back side is made by injecting a weft yarn at every alternate opening of the both sides, and the warp yarn is entangled with the front and back side slack yarn surfaces so that the front and back textures are the same. The method for weaving a four-axis woven fabric according to claim 2, wherein the woven fabric is a woven fabric. 5. A fabric in which the front and back surfaces of a woven fabric are each formed with a weft yarn, the intermediate layer is a slack yarn, and the warp yarn is entangled with the weft yarns on the front and back surfaces so that the front and back fabrics have the same weave texture. Shaft fabric. 6. In order to form the front surface and the back surface of the woven fabric with the weft yarn, respectively, the front slant yarn surface and the reverse slant yarn surface are always weft yarns by alternately swinging one set of slug yarn traversing means and the warp yarn heald. The warp yarn is inserted into the opening so that the front and back weft yarns are injected into the opening so as to form the front and back weft yarn surfaces. 6. The weaving method for a four-axis woven fabric according to claim 5, wherein the woven fabric has the same texture on both sides.