JP2689136B2 - Weaving method of spiral fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is composed of a large number of concentric circumferentially arranged yarns and a large number of radially arranged radial yarns. The present invention relates to a method for weaving a spiral woven fabric having a fan shape, a disk shape, a spiral shape, or the like depending on the size, and provides a fiber reinforcing material suitable for various FRPs.

(Prior Art) A spiral woven fabric in which a large number of warp yarns are concentrically arranged and the weft yarns are radially arranged while intersecting these warp yarns and a weaving method thereof are disclosed in JP-A-57-133242 and JP-A-57242. -171741 and the like. That is, as a method of manufacturing a spiral woven fabric such as a fan-shaped, disc-shaped, and spiral-shaped fabric, when weaving by a weaving mechanism that has basic operations such as opening, weft insertion, and punching, the amount of warp yarns fed out is the width direction. And the fabric is wound on a conical roller having a generatrix angle of 30 degrees with respect to the rotation axis, and a pair of fabrics having a generatrix angle of 15 degrees or more with respect to the rotation axis. A method is known in which a cone-shaped roller nips and picks up.

(Problems to be Solved by the Invention) The winding method using a conical roller is as follows: the generatrix of the conical roller is inclined by 30 degrees with respect to the rotation axis, and the winding method using a pair of conical rollers is , The generatrix of the conical roller is inclined by 15 degrees or more with respect to the rotation axis, and the apex angle of the conical roller used in both cases is 60 degrees or 30 degrees or more. The woven fabric slides down to the smaller diameter side along the inclination of, and warp yarns (circumferential yarns) do not form a uniform circle, resulting in a poor appearance of the spiral woven fabric, and a uniform product cannot be obtained. It was In addition, as described above, the taper is wound in the shape of a conical roller, or is nipped by a pair of conical rollers to be drawn, so that the apex angle of the conical roller is as large as 60 degrees or 30 degrees. Although the warp thread (circumferential thread) is not bent enough, its radius of curvature is relatively large, and the radius of curvature of the innermost circumferential thread is 25 mm or more. Was becoming. Therefore, when a spiral woven fabric corresponding to one circumference is cut out to form a disk, a large hole with a diameter of 50 mm or more is formed in the center, which limits its use, for example, for high speed flywheels. Could not be used.

The present invention provides a method for weaving a spiral woven fabric in which each circumferential yarn of warp yarns forms an even circle and can be used for high speed flywheel and other applications.

(Means for Solving the Problem) A method for weaving a spiral woven fabric according to the present invention is to open a large number of warp yarns arranged in parallel, weft them perpendicularly to the warp yarns, and then beat them into warp yarns and weft yarns. In the weaving method of interlacing, the multiple warp yarns are individually controlled and delivered one by one, and the weft yarns of various types are different in stepwise distance from the selvage yarn on one side to the turning point in the opposite direction. Weaving in width and putting a beating cloth into a vertical angle of 5 degrees or more
3 to 10 take-up rollers arranged in a cone shape with an inclination angle of the generatrix of less than 15 degrees, that is, 2.5 degrees or more and less than 7.5 degrees with respect to the center line, and whose large diameter portion is arranged so as to face the selvage yarn side on one side It is characterized in that it is wound in a zigzag pattern and the take-up roller is rotated and taken up without tension of the warp thread, and the above-mentioned fabric is bent to the small diameter side of the take-up roller.

(Operation) In the weaving method of the present invention, the take-up roller having a vertical angle of 5 ° or more and less than 15 ° and a relatively small angle of 3 to 10 is used for taking up the fabric.
Since the fabric is wound around these take-up rollers in a zigzag manner and nipped, and the take-up roller is rotated without tension of the warp yarn to take up the fabric, a large number of warp yarns are formed into the cone shape. Accurately bend along the surface of the take-up roller. Moreover, the weft insertion length is changed in multiple steps so that the weft thread density behind the weaving line becomes evenly dense on the large diameter side of the take-up roller and becomes evenly coarse on the small diameter side. The warp yarn bends more accurately and easily, and by setting the position of the take-up roller with respect to the warp yarn, the warp yarn located on the small diameter side of the take-up roller can be bent into a small circle with a radius of curvature of less than 15 mm. A spiral woven fabric according to the invention is obtained in which the weft yarns are circumferential yarns and the weft yarns are radial yarns, the density of the radial yarns being substantially uniform.

However, if the apex angle of the take-up roller is less than 5 degrees, the required number of take-up rollers becomes excessive, the mechanical strength of each take-up roller decreases, the drive mechanism becomes complicated, and conversely it exceeds 15 degrees. In this case, the warp yarn T or the spiral woven fabric F slides down the slope of the cone-shaped take-up roller toward the small diameter side due to the tension, and the shape of the circumferential yarn of the spiral woven fabric becomes uneven. If the number of take-up rollers used is 2 or less,
The force for gripping the spiral woven fabric F is insufficient, and the warp yarn T cannot be bent to a desired curvature. On the contrary, when the number is 10 or more, it is too large to control all the take-up rollers.

The obtained spiral woven fabric has a radius of curvature of the innermost circumferential yarn of 5 to 15 mm, and the density of the radial yarn is substantially uniform. By taking this, a perforated disk-shaped fiber reinforcing material with a uniform density having a central hole with a diameter of 10 to 30 mm can be obtained. However, if the radius of curvature of the innermost circumferential thread is less than 5 mm, weaving becomes difficult, and if it exceeds 15 mm, it cannot be used for a desired flywheel or the like.

An elbow-like bent pipe can be obtained by weaving a hollow weave by applying a double design during weaving. Also,
When slanted reeds with inclined and dense reed density are used, and when this sled is moved up and down during weaving, the warp density and the warp yarn arrangement width are partially changed, and the outermost and innermost A helical woven fabric is obtained in which the curvatures of the circumferential yarns are partially different. Further, by moving the take-up roller in the width direction of the plurality of arranged warp yarns, the curvature of each circumferential yarn of the spiral woven fabric is changed, and the take-up roller is partially displaced by being displaced during operation. Spiral woven fabrics with different curvatures can be obtained. Then, by combining the hollow weave and the lifting and lowering of the diagonal reed or the displacement of the take-up roller, a stepped elbow or an elbow with a partially changed curvature can be obtained.

(Example) In FIGS. 2 and 3, a large number of warp threads T are
Each of them is pulled out from a bobbin (not shown) and individually passed through the tensioning device 1, and then the total number of warp threads T
Are arranged in parallel and a pair of upper and lower warp thread gripping devices 2a, 2b,
A first guide roller 3, a tension roller 4 that can be raised and lowered,
1 to the heald wire 6 which is sequentially guided to the second guide roller 5 and driven by a dobby device (not shown).
The books are passed one by one, passed through the reed 7 that moves back and forth, and guided to the front take-up device 8.

The take-up device 8 is composed of five cone-shaped take-up rollers 9 arranged in a fan shape.
Are adjacent to each other in contact with each other along the generatrix, and cantilevered by the roller shaft 9a projecting on the large diameter side (see FIG. 2), and the bevel gear 10 fixed to each roller shaft 9a meshes with each other. The take-up rollers 9 are rotated by intermittently driving the roller shaft 9a on the side of the reed 7 with a motor.

In the above-mentioned structure, when the shed is made by raising and lowering the heald wire 6, the weft W (see FIG. 2) is inserted into the shed by a shuttle (not shown), and further by the advancement of the reed 7, Hitting is done. continue,
The upper and lower warp thread gripping devices 2a and 2b are closed to clamp all the warp thread T, and then the tension roller 4 is raised to a predetermined height, whereby the tension of the warp thread T in front of the warp thread gripping devices 2a and 2b is relaxed. In this state, the five take-up rollers 9 are driven to rotate by a predetermined amount, and the fabric F is taken up by a predetermined length, and the total number of the warp yarns T in a relaxed state following the fabric F are individually required by the required amount. One by one,
As a result, the warp thread T between the cloth fell line and the warp thread gripping device 2a, 2b
Variations in length occur. That is, since the warp thread T located in the large diameter portion of the take-up roller 9 has a larger take-up amount than the warp thread T located in the small diameter portion, the lower warp thread T located in the rear of the cloth fell line in FIG. It is shorter than the upper warp thread T. Further, the warp yarn T that intersects with the weft yarn W has a larger take-up amount than the warp yarn T that does not intersect, so that the warp yarn T becomes shorter behind the weaving line. And the warp thread T behind the cloth fell
Warp yarn gripping device 2a in a state where there are variations in the length of
2b is opened, the warp yarn T is released, and then the tension roller 4 in the raised position is lowered and returned to the original position, the warp yarn T is pulled out from each bobbin according to the take-up length of the warp yarn T, The length of the warp yarn T between the cloth fell line and the tension device 1 is made uniform. Hereinafter, this is repeated and weaving proceeds.

Then, when carrying out weft insertion with the shuttle, the weft insertion length is changed in multiple steps with reference to the large diameter side of the take-up roller 9. For example, when changing the weft insertion length to 5 steps (see Fig. 2), the first weft thread W ₁ is inserted into the full width and folded back, and the second weft thread W ₂ is moved from the large side selvage thread to the full width 2 / Five
Insert it to the position of and fold it back, and put the third weft thread W ₃
Insert it to the position of 4/5 and fold it back. Insert the 4th weft thread W ₄ to the position of 1/5 of its full width and fold it back. 5th weft thread W ₅
Insert it up to the position of 3/5 of the full width and fold it back. Repeat this process until the warp thread T is bent into a circumferential thread, and the weft thread W
In the radial direction, the density of the weft threads (radial threads) W is made substantially uniform in the obtained spiral woven fabric. FIG. 1 shows a spiral woven fabric F woven by changing the weft insertion width of the weft yarn W in 6 steps, in which the warp yarn T forms a circumferential yarn and the weft yarn W forms a radial yarn.

In FIG. 2, five take-up rollers 9 are connected by a bevel gear 10 and rotated, and FIGS. 4 and 5 show examples of chain transmission. That is, a roller drive shaft 9e parallel to the central roller shaft 9a is attached to the roller shaft 9a of the take-up roller 9 other than the central take-up roller 9 via the first universal joint 9b, the intermediate shaft 9c, and the second universal joint 9d. Connect them to the center roller shaft 9a and the roller drive shafts 9e on both sides of the center roller sprocket.
Secure 10 and attach to these chain sprockets 10
As shown in the figure, the endless chain 11 is wound in a zigzag manner, and the endless chain 11 is tensioned with a tension sprocket 12.

FIG. 6 shows that five take-up rollers 9 are arranged in a zigzag manner, and these take-up rollers 9 and corresponding ones of the chain sprockets 10 staggered in one plane are connected by a universal joint. An endless chain 11 is wound around 10 to be driven.

6 of a cone-shaped take-up roller 9 with a vertical angle of 15 degrees and a length of 30 cm
The books are arranged in a zigzag pattern, and 192 warp threads T (carbon fiber thread manufactured by Toray Industries, Inc., trade name "Torayca T300 3K") are arranged at even intervals in a width of 15 cm, and the same weft threads W as the above warp threads T are arranged. ,
The weft insertion width was changed to 8 steps, and it was inserted into the shed by a shuttle to weave a flat weave woven fabric F.
A perforated disc-shaped spiral woven fabric F having a diameter of 310 mm and an inner diameter of 18 mm was obtained.

(Effects of the Invention) The present invention changes the weft insertion width in multiple steps when wefting, wefts with different lengths are arranged on one side, and weft lacking parts with different lengths are formed on the opposite side. Then, the obtained woven fabric is wound around 3 to 10 relatively small cone-shaped take-up rollers having an apex angle of 5 degrees or more and less than 5 degrees, and is nipped and taken up. Independently controlling and sending each of the warp yarns, and performing the above-mentioned take-up operation without tension of the warp yarns, the many warp yarns are prevented from slipping to the small diameter side of the take-up roller, and a large number of warp yarns are prevented. Accurately controlled and bent into an accurate fan shape, a spiral woven fabric with a uniform shape and small density unevenness can be obtained. Consists of various types with different lengths Is, the density of the radial yarns is uniform and the curvature radius of the circumferential yarn of the innermost is very small compared to the conventional 5-15
A spiral weave of mm is obtained. Therefore, by cutting out one circumferential length of this spiral woven fabric, a disc with a uniform density having a central hole with a diameter of 10 to 30 mm, which is extremely smaller than that of the conventional one, can be obtained, and its application is expanded as compared with the conventional one. It can be used as a flywheel.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of the spiral fabric of the present invention,
FIG. 2 is a plan view of the above-mentioned apparatus for producing a spiral fabric, FIG. 3 is a side view of FIG. 2, FIG. 4 is another plan view of a take-up device, and FIG. 5 is a sprocket 10 of the device of FIG. FIG. 6 is a drive mechanism explanatory view of another example of the take-up device. T: Warp thread (circumferential thread), W: Weft thread (radial thread), F:
Helical fabric, 1: Tension device, 2a, 2b: Warp yarn gripping device, 3, 5: Guide roller, 4: Tension roller that can move up and down, 6: Held wire, 7: Reed, 8: Take-up device, 9: Take-up roller .

Claims (1)

(57) [Claims] 1. A weaving method in which a large number of warp yarns arranged in parallel are opened, weft-inserted in a direction orthogonal to the warp yarns, and then beaten to cross the warp yarns and the weft yarns. Individually control and send out each book, weft the above weft threads with various kinds of weft insertion widths in which the distance from the selvage yarn on one side to the turning point in the opposite direction is gradually changed, It is formed in the shape of a cone with an apex angle of 5 degrees or more and less than 15 degrees, and is wound around 3 to 10 take-up rollers arranged so that the large-diameter portion faces the selvage yarn side on the one side. A method for weaving a spiral woven fabric, characterized in that the take-up roller is rotated and taken out under tension, and the above-mentioned fabric is curved toward the smaller diameter side of the take-up roller.