JPH06264325A - Box-shaped woven fabric and its production - Google Patents

Abstract

PURPOSE:To obtain box-shaped woven fabric having excellent strength by opening the outer circumference of woven fabric leaving a square part having a prescribed size, stretching the opened warps and wefts perpendicular to the square part and spirally weaving circumferential yarn to form a circumferential wall parts. CONSTITUTION:The outer circumference of plain weave fabric made of inorganic fibers such as carbon fibers is opened in a state leaving a square part having a prescribed size. Plural sheets of the partially opened fabric are stacked on a placing part 7 and fixed with a mold member 17. The wefts X and the warps Y are fixed to the spring pieces 12, 13, 14, 15 of the upper and lower opening plates 8, 9 slidably expanding with a fixing member 22 pivoted to a post 6 and the upper and lower opening plates 10, 11 expanding under the former plates with a phase difference of 90 deg.. A shuttle 19 is circulated and passed through the opening formed by sliding the opening plates 8, 9, 10, 11 to weave the circumferential yarns theta. Four circumferential wall parts standing on the square part are formed by this process to obtain box-shaped woven fabric.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a box-shaped fabric having excellent strength as a fiber reinforcing member for reinforcing a resin member, and a method for producing the same.

[0002]

2. Description of the Related Art A box-shaped woven fabric for reinforcing a resin member which has been proposed hitherto is a box-shaped development view form as shown in FIG. 1 by plain weaving inorganic fibers (glass fiber, carbon fiber, etc.). A plurality of woven fabrics 25 are woven, and the plurality of woven fabrics 25 in a development view are laminated, and the peripheral wall portions a, b, c, d of each woven fabric 25 are laminated.
Is bent upward, the side edges of the peripheral wall portions a, b, c, d are appropriately stitched together, and the bottom portion e of each fabric 25 is appropriately stitched to form a box-shaped body having a predetermined number of layers. A woven fabric is formed (hereinafter referred to as a conventional example).

[0003]

However, in this conventional example, the peripheral wall portions a, b, c, d of each woven fabric 25 are bent upward,
Since the peripheral walls are formed by appropriately stitching the side edges of the peripheral wall portions a, b, c, and d, the adjacent peripheral walls are stitched but are fundamentally divided. Therefore, there is a drawback that the strength is reduced at this divided portion.

SUMMARY OF THE INVENTION The present invention has a technical object to provide a box-shaped fabric and a method for producing the same, which solves the above drawbacks.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

[0006] A square bottom 1 woven by weft X and warp Y, and four peripheral wall portions 2, 3, 4 woven by weft X and warp Y which are continuously provided on four outer circumferences of the bottom 1. , 5 and the box-shaped woven fabric comprising the bottom part 1 and the peripheral wall part 2,
Boundary V with 3, 4, 5 and four peripheral walls 2, 3, 4,
5 The present invention relates to a box-shaped woven fabric formed in a structure in which there are no divided portions in the boundary portion W of each other.

Further, the outer periphery of a square woven fabric woven with the weft yarn X and the warp yarn Y is opened with the square portion 1 left,
The unfolded woven fabric is arranged at a predetermined position, and the unfolded weft yarn X and warp yarn Y are tensioned in a direction substantially perpendicular to the rectangular portion 1, and a circumferential yarn θ that revolves by appropriate means is provided. A method for manufacturing a box-shaped fabric, characterized by inserting the weft yarns and warp yarns arranged in parallel to each other and arranging the circumferential yarns θ spirally with respect to the weft yarns and warp yarns Is.

[0008]

Since the boundary V between the bottom portion 1 and the peripheral wall portions 2, 3, 4, 5 and the boundary portion W between the four peripheral wall portions 2, 3, 4, 5 are not divided, the strength is improved accordingly. .

[0009]

2 to 9 show an embodiment of the present invention, which will be described below.

In this embodiment, carbon fibers are used as the weft yarn X, the warp yarn Y, and the circumferential yarn θ. Moreover, the box-shaped fabric according to the present embodiment is impregnated with an epoxy resin to be a fiber reinforcing member.

2 and 3 show an apparatus for weaving a box-shaped fabric according to this embodiment, which will be described below.

In this apparatus, a mounting portion 7 is installed under the four columns 6 standing on a base 21, and the upper part of the columns 6 is provided with a fixing member 22 in two upper and lower stages. Aperture plates 8 and 9 are installed, and two upper and lower aperture plates 10 and 11 are similarly installed below the aperture plates 8 and 9 with a phase difference of 90 °.

The opening plates 8, 9, 10, 11 have a structure in which a plurality of wires are arranged in parallel. The opening plate 8 and the opening plate 9 slide with each other, and similarly, the opening plates 10 and 11 mutually. It is configured to slide. Reference numeral 16 is a guide rod.

Springs 12, 13, 14, and 15 as tensioning devices are hung from the opening plates 8, 9, 10, and 11 near both ends thereof.

Therefore, the springs 12, 13, 14 and 15 are arranged in an annular shape so as to be doubled on the inner side and the outer side when viewed from the plane.

Reference numeral 17 shown in FIG. 4 is a mold member, which is formed in a square shape having a bottom area corresponding to the size of the bottom portion 1 of the box-shaped fabric to be woven. The die member 17 is configured to be divided by bolts 18 after taking into consideration the removability from the box-shaped fabric after weaving the box-shaped fabric. Reference numeral 20 is a guide pin.

Next, the case of weaving a box-shaped fabric with this apparatus will be described.

A plurality of plain woven cloths, which are plain woven with the weft threads X and the warp threads Y, are prepared in advance, and the respective plain woven cloths are left with the size of the bottom portion 1 (square shaped portion 1) of the box-shaped fabric to be formed. Each is opened (see FIGS. 5 and 6).

A plurality of the plain weaved cloths thus opened are stacked and placed on the placing portion 7 of the apparatus (the square shaped portion 1 of the plain weave cloth is preliminarily set so that the polymerized plain weave cloth does not slip). Is preferably stitched.), And the die member 17 is placed on the unopened portion of the plain woven cloth, that is, the square portion 1 that becomes the bottom portion 1 (see FIGS. 2 and 3).

Subsequently, the unwound yarns are attached to the springs 12 and 1
It is attached to 3, 14, and 15, respectively. This thread and spring 12,13,1
As shown in FIG. 7, the inner spring 12 and the outer spring 13 are fastened to the outer joints 4 and 15 in this order.

Then, the circumferential thread θ is fixed to an appropriate position of the support 6, and the shuttle 19 is connected to the tip of the circumferential thread θ.

After setting in this way, the opening plate 8,
9 are slid on each other, and the opening plates 10 and 11 are also slid in the same manner, and the shuttle 19 is passed through the opening formed by the adjacent weft yarn X and the adjacent warp yarn Y, and the circumferential yarn θ is circulated once around the outer circumference of the device. If so, open plates 8 and 9 and open plates 10 and 11
Is slid in the opposite direction, and the shuttle 19 is moved in a similar manner, and by repeating this, the weft yarn X, the warp yarn Y are used as the weft yarns, and the circumferential yarn θ is used as the warp yarn.
Weave 3, 4, 5 (see FIG. 8).

When the peripheral wall portions 2, 3, 4, 5 reach a predetermined height, all the threads are removed from the springs 12, 13, 14, 15 and then the threads of the second plain woven cloth are similarly removed. It is fixed to the springs 12, 13, 14, 15 and the peripheral wall portions 2, 3, 4, 5 are similarly woven.

By repeating this operation and weaving a plurality of plain weave fabrics with the opened yarns (weft yarns X, warp yarns Y) and circumferential yarns θ, a fabric in which a plurality of box-shaped fabrics are laminated and polymerized is obtained. Formed (see FIG. 9).

Subsequently, the mold member 17 is divided and removed, and the peripheral wall portions 2, 3, 4, 5 are stitched at appropriate positions (surface portions), so that the bottom portion 1 and the peripheral wall portions 2, 3, 4, 4. A box-shaped woven fabric having a structure in which a boundary portion V with 5 and a boundary portion W of the peripheral wall portions 2, 3, 4, 5 are continuous is woven, and there is no divided portion at the boundary portions V and W. Is a box-shaped fabric with excellent strength.

[0026]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, there is no dividing portion at the boundary between the bottom portion and the peripheral wall portion and at the boundary portion between peripheral wall portions, and therefore a box-shaped fabric excellent in strength as much. Become.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a conventional example.

FIG. 2 is a front view of the weaving device according to the present embodiment.

FIG. 3 is an explanatory perspective view of the above.

FIG. 4 is an exploded perspective view of a mold member according to the present embodiment.

FIG. 5 is an explanatory view of a weaving process according to the present embodiment.

FIG. 6 is an explanatory view of a weaving process according to the present embodiment.

FIG. 7 is an explanatory view of a weaving process according to the present embodiment.

FIG. 8 is an explanatory view of a weaving process according to the present embodiment.

FIG. 9 is an explanatory perspective view of one box-shaped fabric woven by the weaving device according to the present embodiment.

[Explanation of symbols]

 X weft yarn Y warp yarn V, W boundary part 1 bottom part, square part 2, 3, 4, 5 peripheral wall part

Claims (2)

[Claims] 1. A box shape comprising a square bottom woven by weft threads X and warp threads Y, and four peripheral wall sections woven by weft threads X and warp threads Y, which are continuously provided on four outer circumferences of the bottom portions. A box-shaped woven fabric, which is formed in a structure in which there is no division at the boundary V between the bottom and the peripheral wall and the boundary W between the four peripheral walls. 2. A square woven fabric woven with weft yarns X and warp yarns Y is opened on the outer periphery of the woven fabric leaving a square portion, and the opened woven fabric is placed at a predetermined position and opened. The tensioned weft yarns X and warp yarns Y are tensioned in a direction substantially perpendicular to the rectangular portion, and the circumferential yarns θ, which rotate by appropriate means, are inserted between the yarns of the weft yarns and the warp yarns arranged in parallel and the circumferences A method for manufacturing a box-shaped fabric, comprising arranging direction yarns θ spirally with respect to weft yarn groups and warp yarn groups.