JPH05321071A - Spiral woven fabric and reed for producing the same - Google Patents

Abstract

PURPOSE:To provide the objective uniform spiral woven fabric suitable as a member for disk-like or conical highly strong composite materials by using a reed in which the intervals of reed blades are changed in response to their distances from the center of the spiral and weaving warps and wefts so that the density of the wefts are inversely proportional to their distances from the center of the spiral. CONSTITUTION:Warps Sp and wefts Sf having same or different finenesses, respectively, are used. The warps Sp are arranged in the circumferential direction of the spiral through a reed 12 in which the intervals of the reed blades are changed in response to their distances from the center A of the spiral in the radial direction. The wefts Sf are arranged in the state tilted in the radial direction of the spiral and picked into the warps so that the density of the wefts are lowered from the inner circumference of the spiral toward its outer circumference in inverse proportion to their distances from the center A of the spiral to uniformize the METSUKE (unit weight) of the spiral woven fabric irrespective of the distances from the center A of the spiral.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral fabric for producing a disc-shaped or conical high-strength composite material member, and a reed for weaving it.

[0002]

2. Description of the Related Art A spiral woven fabric has been proposed for producing a disc-shaped or conical high-strength composite material member (see, for example, JP-A-3-504401, JP-A-63-1).
763).

The spiral woven fabric uses high-strength fibers such as carbon fibers and aramid fibers as warps and wefts, and the warp is spirally curved to a predetermined radius and the wefts are arranged in the radial direction of the spiral. , Both are woven into a spiral tape shape through an arbitrary weaving structure including a plain weave. In this product, the wefts are arranged in the radial direction of the spiral with respect to the entire width of the fabric from the inner circumference to the outer circumference of the spiral, so the weft density is low in the outer peripheral part of the spiral and high in the inner peripheral part. As a result, a uniform basis weight cannot be obtained over the entire fabric. Therefore, in order to avoid this, it is necessary to randomly vary the lengths of wefts or alternately insert two types of wefts, long and short, to make the basis weight uniform. In any of these cases, long wefts are inserted over the entire width of the fabric, and short wefts are wefted from the outer circumference to the inner circumference of the helix only within the reachable range. Shall be put.

[0004]

According to the prior art described above, the wefts have different weft insertion lengths, and the short wefts need only be wefted in a part of the width of the spiral woven fabric. Therefore, the weft insertion mechanism becomes significantly complicated,
There has been a problem that there is no loom that can continuously realize such a weaving operation. That is,
In the prior art documents proposing these conventional techniques, the specific weaving mechanism is not disclosed at all.

Therefore, in view of the above problems of the prior art, the object of the present invention is to make all the wefts equal in length corresponding to the entire width of the spiral woven fabric, and to change the warp density of the warp in the radial direction of the spiral. The purpose of the present invention is to provide a spiral woven fabric which can realize a uniform basis weight as a whole while using a simple weft inserting mechanism, and a reed for weaving the spiral woven fabric.

[0006]

The structure of the first invention according to the present application for achieving the above object comprises weaving warp yarns arranged in the circumferential direction of the spiral and weft yarns arranged in the radial direction of the spiral. The gist of the warp is to change the warp density according to the radial distance from the center of the spiral.

The warp and the weft may have the same fineness or different finenesses.

Further, the weft can be tilted from the radial direction of the spiral.

The structure of the second invention comprises a large number of reeds and a reed frame for supporting the reeds, and the reeds are reed according to the radial distance from the center of the spiral of the spiral fabric to be woven. The gist is to change the blade spacing.

[0010]

According to the structure of the first invention, the weft is
Since they are arranged in the radial direction of the helix, the weft density continuously decreases from the inner circumference to the outer circumference of the helix in a manner that is inversely proportional to the distance from the center of the helix. Therefore, for the warp, for example, by changing the warp density so as to be proportional to the distance from the center of the spiral, it is possible to compensate for the decrease in the weft density and achieve a uniform basis weight over the entire fabric. it can. This is because the basis weight of the woven fabric is generally determined by the product of the warp density and the weft density. However, here, a specific mode of changing the warp density may be arbitrarily set as long as it is possible to substantially compensate for the decrease in the weft density. That is, the warp density may be arbitrarily changed on the inner circumference of the spiral with the basis weight corresponding to the maximum weft density as a reference so that the basis weight is maintained in the radial direction.

The warp yarn and the weft yarn may have the same fineness or different finenesses. In any case, the basis weight K can be represented by, for example, K = wp dp * wf df = wp kp R * wf kf (1 / R) = wp kp * wf kf, and the distance R from the center of the helix This is because it can be made uniform regardless of However,
Here, wp and wf represent the fineness of the warp and weft, respectively, and dp = kp R and df = kf (1 / R) represent the warp density and the weft density, respectively. Also, kp and kf are
It is a constant.

When tilting the weft from the radial direction of the spiral,
For example, when applied to a rotating friction material such as a brake disc of a vehicle, the force applied to the weft thread does not act in the direction perpendicular to the weft thread, but can be applied by inclining from the right angle direction. It is possible to greatly improve durability.

According to the structure of the second invention, since the reed wing changes the reed interval according to the distance from the center of the spiral of the spiral fabric to be woven, the reed is separated from the center of the spiral. The warp yarns can be arranged so that the warp yarn density changes according to the above, and thus can be effectively used for weaving the spiral woven fabric according to the first invention.

[0014]

Embodiments Embodiments will be described below with reference to the drawings.

The spiral woven fabric S is formed by weaving warp yarns Sp, Sp ... And weft yarns Sf, Sf .. (FIG. 1), and is woven into a spiral tape having an inner diameter R1 and an outer diameter R2. .. However, here, the inner diameter R1 and the outer diameter R2 refer to the radial distance R from the center A of the spiral formed by the spiral fabric S to the inner circumference and the outer circumference of the spiral.

The spiral woven fabric S is composed of the heddle frames 11 and 11 and the reed 1
2. Weaving is performed by a loom including a weft inserting mechanism 13, a feeding mechanism 14, and a winding mechanism 15 (FIGS. 1 and 2).

The heddle frames 11 and 11 are respectively the warp threads S.
By providing a heald corresponding to p and alternately moving up and down via a heddle frame drive mechanism (not shown), the warp threads Sp, Sp ... Can be opened in the lower warp sheet Sp1 and the upper warp sheet Sp2. The warp yarns Sp, Sp ...
Each of them is pulled out from a creel or beam (not shown) while applying a predetermined tension.

The reed 12 includes the heald frames 11 and 11 and the feeding mechanism 1.
4, which is arranged in the middle of the frame 4, and supports a large number of reed blades 12b, 12b ... By the reed frames 12a, 12a (FIG. 3). The reed blades 12b, 12b ... Reed frame 12a, 12b so that the reed blade spacing x continuously changes in inverse proportion to the radial distance R from the center A of the spiral formed by the spiral woven fabric S.
It is arranged on a. In the reed 12, the warp yarns Sp pass back and forth in correspondence with the respective reed blade intervals x (FIGS. 1 and 2), and the warp yarns S
Along the p, Sp, ..., it is possible to move back and forth between a retracted position where the weft inserting mechanism 13 is retracted rearward and a forward position where the weft thread Sf inserted by the weft inserting mechanism 13 is driven into the cloth fell F. . However, the cloth fell F is orthogonal to the warp threads Sp, Sp ... And is set to a position which is coincident with the radius passing through the center A of the spiral or is very close to this radius.

The weft inserting mechanism 13 inserts the weft yarn Sf from the package Sf1 between the reed 12 which has retracted to the retracted position and the cloth fell F between the lower warp sheet Sp1 and the upper warp sheet Sp2. The weft inserting mechanism 13 is preferably a rapier mechanism using a tape rapier or a rod rapier, or a needle mechanism, and a cutter 13a is arranged on the front surface thereof. The cutter 13a cuts the rear end portion of the weft thread Sf put in the weft every time the weft is put in.

The feeding mechanism 14 is disposed immediately in front of the cloth fell F and has a pair of frame-shaped holding members 14a, 14a.
It is composed of a pair of drive members 14b and 14b arranged so as to be housed in the holding members 14a and 14a (FIGS. 2 and 4). The holding members 14a, 14a, the driving member 14
b and 14b are warp Sp, Sp ... and weft Sf, respectively.
, Sf, and the spiral woven fabric S are sandwiched in between.

The holding members 14a, 14a hold the spiral woven fabric S by sandwiching it by reciprocating up and down at the same time by a driving mechanism (not shown) in opposite directions (arrows K1, K1 in FIG. 4). There may be a position and a release position for releasing the spiral fabric S. In addition, the drive member 14
Similarly, the b and 14b can take the holding position and the releasing position with respect to the spiral woven fabric S by simultaneously reciprocating vertically in the opposite directions (arrows K2 and K2 directions in the figure), and When in the position, the spiral fabric S is simultaneously advanced in the feeding direction of the spiral fabric S to drive the spiral fabric S (directions of arrows K3 and K3 in the figure), and when in the release position, it is retracted and returned to the original position. Can be done (arrow K3 in the figure,
The opposite direction of K3). The forward / backward movements of the driving members 14b, 14b are assumed to be reciprocal swinging movements around a vertical axis (not shown) passing through the center A of the helix, and therefore, the driving direction of the spiral fabric S is the circumferential direction of the spiral. Shall match.

Holding members 14a, 14a and driving member 14
b and 14b are driven in conjunction with each other (FIG. 5). That is, when the holding members 14a, 14a are driven from the holding position to the release position (time t = t1 in FIG. 5).
Hereinafter, simply described as t = t1). Prior to that, the driving members 14b and 14b are driven from the release position to the holding position (t = to). Also, the drive members 14b, 14b
Returns the holding members 14a, 14a to the holding position when the holding members 14a, 14a have reached the release position (t = t1), start the forward movement (t = t2), and complete the forward movement (t = t3). (T = t4). After that, the driving members 14b, 1
4b drives from the holding position to the release position (t = t5
), The backward movement is started (t = t6), and when the backward movement is completed (t = t7), it is returned to the holding position (t = t8). When the drive members 14b, 14b return to the holding position (t = t
8) and drive the holding members 14a, 14a to the release position (t
= T9) and thereafter, the same operation is continued.

Therefore, the spiral fabric S is held by the holding member 14
The warp yarns Sp, Sp, ..., Which are held alternately by a, 14a and the driving members 14b, 14b, can maintain a predetermined tension. Further, the spiral woven fabric S includes the driving member 14b,
When 14b moves forward, it can be fed by a predetermined feed amount in the direction of arrow K3 in FIG.

The winding mechanism 15 is a horizontal disc which is disposed below the feeding mechanism 14 (FIG. 2) and intermittently rotates horizontally around the center A of the spiral. The rotational movement of the winding mechanism 15 is synchronized with the forward movement of the drive members 14b, 14b, and the rotational direction and the amount of rotation of the drive members 14b, 14b are the same.
It is assumed that it corresponds to the forward movement direction of b and the forward movement amount (directions K3 and K4 in FIG. 2). The winding mechanism 15 moves downward in FIG. 2 while rotating in the direction of arrow K4 in FIG.

In such a loom, the warp threads Sp, Sp, ... Are opened by the heald frames 11, 11 and the weft insertion mechanism 13 inserts the weft threads Sf for each cycle of the operation cycle of the feeding mechanism 14 shown in FIG. By driving the weft insertion Sf into the cloth fell F by the reed 12, the spiral woven fabric S can be continuously woven. Further, in the spiral woven fabric S at this time, the wefts Sf, Sf ... Are arranged in the radial direction of the spiral, and therefore the weft density df is inversely proportional to the radial distance R from the center A of the spiral. Is becoming Further, the warp density dp continuously changes in proportion to the distance R from the center A of the spiral.
This is because the reed blades 12b, 12b ... Of the reed 12 are arranged so that the reed spacing x continuously changes in inverse proportion to the distance R. Therefore, the basis weight K of the spiral woven fabric S is
The entire spiral fabric S can be made uniform.

[0026]

[Other Embodiments] The wefts Sf, Sf ... Can be inclined by an inclination angle θ with respect to the radial direction of the spiral formed by the spiral fabric S (FIG. 6). That is, the reed 12 has a warp Sp,
It is arranged so as to be inclined by an inclination angle θ with respect to Sp ...
Further, the cloth fell F side of the feeding mechanism 14 is also formed to be inclined by the inclination angle θ. Therefore, the reed 12 has a weft insertion mechanism 13
The weft yarn Sf inserted by the weft can be driven into the cloth fell F with an inclination angle θ.

The inclination angle θ can be generally determined arbitrarily, but in practice, it should be θ ≦ 45 (degrees), and particularly 10 ≦ θ ≦ 40 (degrees) is preferable. .. If the inclination angle θ is too large, it is difficult to maintain the shape of the spiral fabric S, and if it is too small, the weft Sf
This is because the effect of tilting is not obtained. The weft Sf
When the inclination angle θ is not large, the weft insertion may be performed at right angles to the warp yarns Sp, Sp, ... Regardless of FIG.

In the above description, the warp yarns Sp, Sp ...
Is preferably run linearly from the creel or beam to the cloth fell F. For that purpose, the mounting intervals of the healds of the heddle frames 11, 11 are arranged in accordance with the reed wing interval x. Is good.

The spiral woven fabric S has warp yarns Sp and Sp.
Any fibrous material can be used as the wefts Sf, Sf. That is, in addition to general fibers such as hair, cotton, nylon, polyester, acrylic, carbon fiber, glass fiber, aramid fiber, tyranno fiber, alumina fiber,
It goes without saying that any new high-strength material such as metal fiber may be used.

The weave design of the spiral woven fabric S may be any weave design such as twill weave, satin weave, etc. other than plain weave. Further, for that purpose, the number of the heddle frames 11 and 11 can be two or more, and the heald frames 11 and 11 can be moved up and down in any order according to the woven structure. The weft inserting mechanism 13 can use any weft inserting method such as a rapier mechanism, a needle mechanism, a fluid jet method using an air or water jet, and a shuttle method using a shuttle.

The warp yarns Sp, Sp ..., Weft yarns Sf, Sf
, May have the same fineness, but may have different fineness, and both may be the same material or may be made of different materials.

The weft density df of the spiral woven fabric S takes the maximum value at the inner circumference of the spiral, that is, R = R1.
Therefore, the amount of forward movement of the feed mechanism 14 for each weft insertion is R
= R1 weft density dp = dp1 may be determined to be optimum.

Generally, the spiral woven fabric S after weaving is
Even if the warp density dp during weaving is accurately proportional to the distance R from the center A of the spiral, the warp Sp, Sp ..., Weft Sf
, Sf, etc., may cause the basis weight K to not be exactly uniform. Therefore, the terms “proportional” and “inverse proportion” in this specification include a proportional relationship and an inverse proportional relationship in consideration of such circumstances. That is, reed 12
Is not exactly reciprocal to the distance R, and it is sufficient to determine the warp density dp such that the basis weight K is uniform in the spiral woven fabric S after weaving.

Further, the warp density dp of the spiral woven fabric S and the reed dent spacing x of the reed 12 can be arbitrarily changed according to the distance R so that a substantially uniform basis weight K can be obtained. .. For example, the reed dent spacing x may be changed into a small stepwise manner by grouping a plurality of adjacent two or more warp yarns Sp, Sp, ... (Fig. 7).

[0035]

As described above, according to the first invention of this application, since the wefts are arranged in the radial direction of the spiral, the weft density is inversely proportional to the distance from the center of the spiral. While the warp decreases from the inner circumference to the outer circumference of the spiral, the warp density can be compensated by changing the warp density according to the distance from the center of the spiral. It is possible to make uniform regardless of the distance from the center of the spiral. Therefore, even if laminated in multiple layers, there is an excellent effect that mechanical specifications including the entire thickness can be made uniform.

According to the second aspect of the invention, the reeds are arranged so that the reed spacing changes according to the distance from the center of the helix, so that the warp density of the warp is the distance from the center of the helix. Accordingly, the spiral woven fabric according to the first invention can be easily woven by weft-inserting the wefts in the radial direction of the spiral.

[Brief description of drawings]

1] Overall schematic plan view

FIG. 2 is an overall perspective explanatory view

FIG. 3 is a front explanatory view of the reed.

FIG. 4 is an explanatory cross-sectional view corresponding to line XX in FIG.

[Fig. 5] Operation explanatory diagram

FIG. 6 is a view corresponding to FIG. 1 showing another embodiment.

FIG. 7 is an explanatory diagram showing another embodiment.

[Explanation of symbols]

 Sp ... Warp Sf ... Weft A ... Spiral center R ... Distance dp ... Warp density x ... Reed spacing 12 ... Reed 12a ... Reed frame 12b ... Reed

Claims (5)

[Claims] 1. A warp yarn arranged in a circumferential direction of a spiral and a weft yarn arranged in a radial direction of the spiral are woven, and the warp yarn changes a warp density according to a radial distance from a center of the spiral. A spiral woven fabric characterized by that. 2. The spiral woven fabric according to claim 1, wherein the warp and the weft have the same fineness. 3. The spiral woven fabric according to claim 1, wherein the warp yarn and the weft yarn have different finenesses. 4. The spiral woven fabric according to claim 1, wherein the weft is inclined from the radial direction of the spiral. 5. A plurality of reeds and a reed frame for supporting the reeds, wherein the reeds have a reed spacing according to a radial distance from a center of a spiral of a spiral fabric to be woven. A reed for weaving a spiral woven fabric characterized by being changed.