JP4985022B2 - Reinforcing fiber fabric manufacturing method and warp supply device - Google Patents

Description

  The present invention relates to a method for manufacturing a reinforced fiber fabric having reinforcing fibers in warp yarns, and an apparatus for manufacturing the same. More specifically, the present invention relates to a reinforcing fiber woven fabric obtained by improving a warp yarn supply means composed of reinforcing fiber bundles suitable for producing a unidirectional woven fabric in which woven fabrics and weft meandering are likely to occur remarkably. The present invention relates to a manufacturing method and a warp supply device.

  In the manufacture of fiber reinforced plastics (FRP) that requires high quality such as aircraft structural members, it is common to use reinforcing fibers in the form of an intermediate substrate, and the intermediate substrate is a reinforcing fiber. Often used in the form of a woven fabric. Among woven fabrics, so-called unidirectional fabrics in which reinforcing fiber bundles are arranged in only one direction as warp yarns and woven with fine weft yarns are often used for repair and reinforcement in the civil engineering and construction fields (Patent Document 1). reference).

  However, in this unidirectional fabric, the warp yarns that are reinforcing fiber bundles are hardly bent, so that each of the unidirectional fabrics is caused by variations in the feed amount at the time of warp supply during weaving of the fabric and fluctuations in tension at the opening and closing port of the warp yarn sheet. Due to slight differences in warp yarn length, there is a problem that fabric wrinkles (irregular uneven surface state formed by uneven warp length) and weft meandering are easily manifested due to partial warp swells. There was a need for a solution.

  In order to solve the above problem, as a method for supplying the warp of the woven fabric, there has been proposed a method in which a warp yarn comprising a reinforcing fiber bundle is opened and then supplied while nipping with a nip roller (see Patent Document 2). In this method, since the warp yarn is supplied while being opened, the yarn width is expanded and a woven fabric having a small gap can be obtained. However, particularly when a unidirectional woven fabric is woven, there is a problem that the sag and the weft meander tend to occur remarkably. In addition, the warp yarn composed of a bundle of reinforcing fibers unwound from the reinforcing fiber bobbin is swung around two horizontal guide bars while being wound around an S-shape, and then the warp yarn is opened. Has been proposed (see Patent Document 3). In this method, since the warp yarn is opened, a reinforced fiber fabric having a small gap can be obtained in the same manner as in Patent Document 2 described above. However, in this method, particularly when a unidirectional woven fabric using a weft having a fineness is woven, the wrinkles and the weft meandering tend to occur remarkably.

In the above-described conventional technology, the effect of reducing the gap in the woven fabric can be obtained by opening the warp yarn. However, when the woven fabric is used, it is easy to cause wrinkling and weft meandering, and when formed into FRP, it has high mechanical characteristics. Not only was it not possible to obtain a molded product with excellent surface smoothness.
Japanese Patent Laid-Open No. 10-121345 (FIG. 2) Japanese Unexamined Patent Publication No. 2000-226754 (FIG. 1) Japanese Unexamined Patent Publication No. 7-300738 (FIG. 1)

  An object of the present invention is to solve the above-mentioned problems of the prior art, and in weaving a reinforcing fiber fabric having reinforcing fibers in the warp yarn, the reinforcing fiber is less likely to cause fabric wrinkling or weft meander due to a difference in warp yarn length. An object of the present invention is to provide a method for producing a woven fabric and a warp supply device.

The present inventors have hypothesized that the woven fabric of the reinforcing fiber fabric having reinforcing fibers in the warp and the meandering of the weft will be caused by the difference in the warp yarn length, and the difference in the warp yarn length. The width of the warp yarn is controlled based on the idea that this may be caused by the difference in the radius from the guide roll center to the yarn bundle center due to the difference in the warp yarn thickness. As a result, it has been found that when the thickness of the warp yarn is indirectly fixed, the problem can be solved. That is, the method for producing a reinforced fiber fabric of the present invention includes:
It has a weaving process in which reinforcing fiber bundles that become warp yarns are passed one by one through the healds assembled to a plurality of heald frames, and the warp yarns are opened by moving the heald frame up and down, and the weft yarns are driven into the hooks. A method for producing a reinforced fiber fabric, characterized in that a reinforcing fiber bundle is sent to a weaving step through the following steps (A) to (C), and the reinforcing fiber woven fabric having at least reinforcing fibers in the warp yarn It is a manufacturing method.
(A) Positioning step of aligning and aligning a plurality of reinforcing fiber bundles unwound from the reinforcing fiber bobbin at equal intervals in the width direction as warp yarns of a woven fabric (B-1) (B-1) Expanding the warp yarn width After the opening and widening step and the opening and widening step of (B-1) above, (B-2) narrowing the warp yarn width and aligning the warp yarn width , width not exceeding has been positioned in the positioning step interval for regulating the yarn width of the warp yarns, a plurality of reinforcing fiber bundles aligned first yarn width regulating step (C) said pull sheet-like warp with the delivery roller As a sheet, sending out to the weaving process, sending process Also, the warp supply device of the present invention applied to the manufacturing method of the reinforcing fiber fabric,
A warp supply device installed between a creel mounting a reinforcing fiber bobbin and a weaving means of an apparatus for producing a reinforcing fiber fabric having reinforcing fibers in warp yarns, comprising the following means (a) to (c): This is a warp yarn feeding device.
(A) Reinforcing fiber bundle positioning means in which a plurality of bars or wires are arranged perpendicular to the warp yarn conveying surface (b) (b-1) At least two or more of the central axes are parallel and not on the same horizontal plane (B-2) Plurality arranged perpendicularly to the warp yarn conveying surface, installed in the downstream of the opening and widening means of (b-1), Downstream of the first yarn width regulating means of the first yarn width regulating means (c) and (b) of the reinforcing fiber bundle comprising a bar or wire of the above and a roller arranged in parallel with at least one warp yarn conveying surface installed in the at least one roller delivery means of the reinforcing fiber bundle Ru Oh the drive roller

  According to the present invention, the warp yarns can be sent to the weaving process while regulating the yarn width so that the warp yarns do not overlap. Can be suppressed.

  The reinforcing fiber fabric obtained by the manufacturing method of the reinforcing fiber fabric of the present invention and the warp supply device has almost no difference in warp length of the warp yarns composed of reinforcing fibers. In this case, it is possible to provide a reinforcing fiber fabric that not only exhibits high strength and elastic properties such as an elastic modulus, but also can achieve an excellent appearance quality without the fabric being sticky. The above-described effect is maximized in a unidirectional fabric.

The method for producing a reinforced fiber fabric having the reinforcing fiber of the present invention in the warp yarn passes the reinforcing fiber bundles that become the warp yarns one by one through the healds assembled to the plurality of heald frames, and moves the heald frame up and down. A method for producing a reinforced fiber fabric having a weaving process in which a warp is opened and a weft thread is driven into the shed, and the reinforcing fiber bundle is sent to the weaving process through the following steps (A) to (C). It is characterized by this.
(A) Positioning step of aligning and aligning a plurality of reinforcing fiber bundles unwound from the reinforcing fiber bobbin at equal intervals in the width direction as warp yarns of a woven fabric (B-1) (B-1) Expanding the warp yarn width After the opening and widening step and the opening and widening step of (B-1) above, (B-2) narrowing the warp yarn width and aligning the warp yarn width , width not exceeding has been positioned in the positioning step interval for regulating the yarn width of the warp yarns, a plurality of reinforcing fiber bundles aligned first yarn width regulating step (C) said pull sheet-like warp with the delivery roller Sending process as a sheet, sending process to the weaving process Here, the process (A) is for determining the arrangement position of the warp yarns, and is the subsequent process if the warp yarns are not positioned at equal intervals (B) (Details ) yarn width regulating Engineering in step of (B-2)) to Thread width regulation becomes difficult in. Further, after adjusting the yarn width by regulating the yarn width by the step (B) (specifically, (B-2)) , the warp yarn supply amount is obtained by sending out the warp yarn while niping by the step (C). Can be made uniform, and it is possible to suppress wrinkling and weft meandering in the reinforcing fiber fabric. For this reason, the effect of the present invention cannot be obtained if even one of these components is applied.

The warp supply device of the present invention is a warp supply device installed between a creel mounting a reinforcing fiber bobbin and a weaving means of an apparatus for producing a reinforcing fiber fabric having reinforcing fibers in the warp. It has the means of a)-(c), It is characterized by the above-mentioned.
(A) Reinforcing fiber bundle positioning means in which a plurality of bars or wires are arranged perpendicular to the warp yarn conveying surface (b) (b-1) At least two or more of the central axes are parallel and not on the same horizontal plane (B-2) Plurality arranged perpendicularly to the warp yarn conveying surface, installed in the downstream of the opening and widening means of (b-1), Downstream of the first yarn width regulating means of the first yarn width regulating means (c) and (b) of the reinforcing fiber bundle comprising a bar or wire of the above and a roller arranged in parallel with at least one warp yarn conveying surface installed in, the conveying surface of the warp yarns of at least one roller during the delivery means each means Oh Ru reinforcing fiber bundle with the driving roller, aligned drawn in between the front and rear guide rollers of the first yarn width regulating means Also refers to the plane through which warp threads pass To.

Here, means (a) is for determining the arrangement position of the warp yarns, and if the warp yarns are not positioned at equal intervals, it is a subsequent step (B) (specifically, in the step (B-2)) . (B) It becomes difficult to regulate the yarn width by the yarn width regulating means by the means (specifically (b-2)) . Furthermore, after adjusting the yarn width by regulating the yarn width by means of (b) (specifically, (b-2)) , the warp yarn supply amount is obtained by sending out the warp yarn while niping by means of (c) Can be made uniform, and it is possible to suppress wrinkling and weft meandering in the reinforcing fiber fabric. For this reason, the effect of the present invention cannot be obtained if even one of these components is applied.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic side view showing an example of a manufacturing apparatus including a warp supply device used in a method for manufacturing a reinforcing fiber fabric having the reinforcing fiber of the present invention in a warp.

  In the method for producing a reinforcing fiber fabric of the present invention, a plurality of reinforcing fiber bundles unwound from the plurality of reinforcing fiber bobbins 1 are positioned and aligned at equal intervals in the width direction as warp yarns 2 of the reinforcing fiber fabric 13; The yarn width is regulated so that adjacent warp yarns do not overlap on the nip rollers 7a, 7b, and sent as a warp yarn sheet to the weaving process, and the weft thread 11 is inserted into the shed in the weaving process, so A reinforcing fiber fabric without meandering can be obtained.

Hereinafter, (A) positioning step, (B) (B-1) fiber opening and widening step, and (B-2) first yarn width regulating step according to the method for producing a reinforced fiber fabric of the present invention, (C) (A) Reinforcing fiber bundle positioning means, (b) (b-1) fiber opening and widening means, and (b-2) reinforcing fiber bundle according to the feeding process of the reinforcing fiber bundle and the warp supply device of the present invention The first yarn width regulating means, and (c) the reinforcing fiber bundle sending means will be described in detail.

(A) Reinforcing fiber bundle positioning step and (a) Reinforcing fiber bundle positioning means In the reinforcing fiber bundle positioning step, a plurality of reinforcements unraveled from a plurality of reinforcing fiber bobbins 1 as warp yarns 2 of the reinforcing fiber fabric. It is necessary to position and align the fiber bundles at equal intervals in the width direction by positioning means (comb 3 in the example of FIG. 1). Here, positioning and aligning the warp yarns 2 of the reinforcing fiber fabric at equal intervals in the width direction refers to arranging the warp yarns 2 in parallel at equal intervals in the width direction. Means that a deviation within ± 10% of the warp yarn interval is allowed with respect to the position.

  The positioning means of the reinforcing fiber bundle (warp yarn 2) is used for arranging the warp yarns 2 at a predetermined interval, and is arranged between the creel device and the first yarn width regulating means of the reinforcing fiber bundle. . Examples of such positioning means include a plurality of bars (those having a cross-sectional shape such as a substantially circle or rectangle) or positioning means (so-called comb) in which wires are arranged perpendicular to the warp yarn conveyance surface, and rollers with grooves. However, it is preferable to use a comb. A comb is a structure in which a plurality of bars or wires are arranged perpendicularly to the warp yarn conveying surface at the same interval as the warp yarns 2 of the reinforcing fiber fabric, and one warp yarn is placed between the bars or between the wires. By passing the yarn, the warp yarns 2 are aligned in the width direction of the reinforcing fiber fabric, and the warp yarns 2 can be aligned to a desired density. Here, the arrangement density means the number of fiber bundles existing per unit length, and the number obtained by subtracting 1 from the number of warp yarns of the reinforcing fiber fabric is the center of the fiber bundles of the warp yarns at both ends of the reinforcing fiber fabric. It is defined as the value divided by the distance.

  In the case where the warp yarn 2 is a flat yarn having a larger yarn width than the yarn thickness, the yarn width and yarn thickness of the warp yarn 2 are likely to change due to contact with the wire of the comb 3, so that the reinforcing fiber described later If the flat surface of the warp yarn 2 contacts only the wire of the comb 3 so that the yarn width can be easily regulated in the first yarn width regulating step of the bundle, the cross-sectional shape of the warp yarn 2 can be maintained. That is, by twisting the direction of the warp yarn pulled out horizontally from the creel device by 90 ° in the positioning step, the flat surface is brought into contact with the wire of the comb 3, and the twist is returned to the original in the first yarn width regulating means. Thus, the flat surface of the warp yarn can be brought into contact with only the wire.

(B) (B-1) fiber opening / widening step, and (B-2) first yarn width regulating step of the reinforcing fiber bundle, and (b) (b-1) fiber opening / widening means, and (b- 2) First yarn width regulating means of reinforcing fiber bundle In the first yarn width regulating step (B-2) of reinforcing fiber bundle, warp yarns 2 of reinforcing fiber fabric are equally spaced in the width direction. This is a step of regulating the yarn width of the warp yarn 2 composed of a plurality of positioned and aligned reinforcing fiber bundles so as not to exceed the interval positioned in the positioning step. The warp yarn 2 whose yarn width is regulated in this step is guided to the feeding step of the reinforcing fiber bundle in the next step. The thread width here refers to the thread width on the final roller until the reinforcing fiber delivery process, and is measured by a measurement method that does not change the thread width when measured with a non-contact laser displacement meter. It is a thing. Further, in this step, regulating the yarn width means to align the widths of the warp yarns 2 arranged in the width direction within a range not exceeding the arrangement density, and ± 10 from the average value of the yarn widths. Variation within% is allowed. The average value is a value obtained by measuring the width of each warp yarn at the same position in the width direction on the final roller at regular intervals in the length direction. In this way, by regulating the yarn width to a width that does not exceed the positioning interval in the positioning step, the warp yarns are sent to the weaving step without overlapping on the nip roller or tension roller in the warp yarn sending step of the next step. You will be able to do it. The first yarn width regulating means (b-2) in this step of the reinforcing fiber bundle refers to means for aligning the width of the warp yarns 2 arranged in the width direction within a range not exceeding the arrangement density. Each of the warp yarn widths that are uneven at the upstream of the yarn width regulation step is passed between at least two bars, and the warp yarns having a width greater than or equal to a predetermined yarn width are narrowed. It has the function of aligning the warp yarn width. As long as it has such a function, the structure and the like are not particularly limited. As a preferable example, a plurality of bars (preferably having a substantially circular cross section) 5 or wires (not shown) are arranged perpendicular to the warp yarn conveyance surface. In addition, there is a yarn width regulating means of the reinforcing fiber bundle in which at least one guide roller 6 is horizontally arranged. FIG. 2 shows an example of a yarn width regulating guide portion that regulates the yarn width using the yarn width regulating means according to the present invention. By using this yarn width regulating means and guiding the warp yarn to the horizontal guide roller 6 while contacting the warp yarn with the plurality of bars 5 or wires, the yarn width of the warp yarn can be regulated.

  In order to regulate the yarn width, if a plurality of bars 5 or wires to be used have a substantially circular cross section, the diameter of the bar (the outer dimension if the cross section is a rectangular cross section) or the diameter of the wire can be adjusted to adjust the adjacent bar and bar. The width of the warp yarn passing between the wires or between the wires can be regulated.

  A typical example of the first yarn width regulating means is a comb. The comb is a plurality of bars or wires arranged perpendicular to the warp yarn conveying surface at the same interval as the warp yarns 2 of the reinforcing fiber fabric, and a large number of combs are passed by passing warp yarns one by one between the bars or wires. The warp yarns 2 can be positioned in an arrangement position with respect to the width direction of the reinforcing fiber fabric, and the warp yarns 2 can have a desired arrangement density. Furthermore, it can be controlled to a predetermined yarn width by adjusting the diameter of the bar or the wire diameter.

The present invention, during the positioning step and the first yarn width regulating step, opening-widening spreading the Itohaba as yarn width of the warp is equal to or greater than the yarn width regulated by the first yarn width regulating step Step (B-1) is included .

  That is, since the warped yarn 2 that has been positioned and guided can be once expanded beyond the yarn width that is regulated in the first yarn width regulating step of the next step, it can be led to the first yarn width regulating step of the next step. This is preferable because it can be aligned with the yarn width that regulates the warp yarns with higher accuracy.

As the fiber opening / broadening means (b-1) in the fiber opening / broadening step (B-1) of the reinforcing fiber bundle, at least two horizontal rollers or horizontal bars whose central axes are parallel and not on the same horizontal plane And a widening means (details will be described later). Then, by passing the warp yarn 2 in contact with the at least two horizontal rollers or horizontal guide bar rollers in an S-shape, the width of the warp yarn 2 positioned and guided can be expanded.

  Here, at least a pair of guide rollers and a swinging roller swinging left and right will be described with reference to FIG. FIG. 3 is a partial schematic side view showing an example of an apparatus for producing a reinforced fiber fabric according to the present invention. In FIG. 3, 30a and 30c are a pair of guide rollers, and 30b is a swinging roller that swings left and right, thereby reducing the width of the warp yarn by swinging the swinging roller located between the two guide rollers. Can be expanded. Further, if the warp yarns are not sufficiently spread and widened, it is easier to adjust the yarn width if 30a, 30c, 30e are guide rollers and 30b, 30d are swing rollers that swing left and right. Increasing the number of guide rollers and swing rollers makes it easier to increase the yarn width.

  Moreover, it is preferable to preheat to a temperature of 50 to 100 ° C. to soften the sizing agent before guiding the warp yarn 2 to the first yarn width regulating step of the reinforcing fiber bundle. By doing in this way, the curl of the warp yarn 2 can be removed, and the yarn width can be prevented from being reduced by false twisting in the subsequent process.

  In the present invention, by passing through the first yarn width regulating step, the feed amount of the warp yarn 2 can be made uniform, thereby eliminating the occurrence of the yarn length difference of the warp yarn 2 and causing the fabric wrinkle that has been a problem in the past. It has great significance in finding out that the occurrence of meandering of the weft yarn can be solved. As described in the background art, the conventional warp yarn supply method, that is, the combination of warp yarn opening and widening processing, or the combination of warp yarn opening and widening processing and the method of regulating the warp yarn arrangement pitch is not sufficient. Could not be resolved. This is because the conventional methods do not have a means for regulating the width and thickness of the warp yarn, so that the cross-sectional shapes of the warp yarns are not uniform, and there is a difference in the yarn width and thickness for each warp yarn. It is considered that all the feed amounts of the warp yarn 2 could not be made uniform in the next delivery process because of the difference in the thickness of the yarn.

(C) Reinforcing fiber bundle delivery step and (c) Reinforcing fiber bundle delivery means The reinforcing fiber bundle delivery step of the present invention has a yarn width so that adjacent warp yarns do not overlap in the first yarn width regulating step. This is a step of forming a plurality of regulated and bundled reinforcing fiber bundles into a sheet-like warp yarn sheet and sending it to the weaving step.

  Here, as a method for sending out the warp yarn 2, there are a method for sending out the warp yarn 2 while nipping it with a roller, and a method for sending out the warp yarn by bringing it into contact with the roller surface.

  In the method of feeding the warp yarn 2 while nipping, if there is overlap of the warp yarns, the yarn thickness will not be uniform, and there will be a yarn that will be nipped and a yarn that will not be nipped at the time of feeding, and the feed amount of the nipped yarn can be made uniform. Threads that are not nipped slip, so that all the delivery amounts of the plurality of warp yarns 2 cannot be made uniform. Further, in the method of sending out the warp yarn 2 while being in contact with the roller, the circumferential length difference when contacting the roller is caused due to the difference in the warp yarn thickness due to the overlap of the warp yarns. Can not.

  On the other hand, in the present invention, the first yarn width regulating step is provided between the reinforcing fiber bundle positioning step and the present reinforcing fiber bundle feeding step, thereby making the warp yarn width uniform and overlapping the warp yarns. Therefore, it is possible to eliminate the occurrence of a difference in the yarn lengths of the plurality of warp yarns 2.

  That is, in the present invention, in the reinforcing fiber bundle positioning step, the arrangement position in the width direction as the warp yarn 2 of the reinforcing fiber fabric is regulated, and the arrangement position is held in the first yarn width regulating step of the reinforcing fiber bundle. However, the yarn width of the reinforcing fiber bundle can be made uniform by regulating the yarn width. Then, a plurality of warp yarns 2 having the same width are guided to the feeding step of the reinforcing fiber bundle in the next step, and the warp yarns 2 are warped in a state where a plurality of warp yarn lengths are aligned through the feeding step of the reinforcing fiber bundle. By being able to lead to the weaving process, the occurrence of the difference in the length of the warp yarn 2 can be eliminated.

As a preferable aspect of the feeding step of the reinforcing fiber bundle, a plurality of feeding rollers are used, and adjacent warp yarns are sequentially arranged on different feeding rollers, or are arranged in order for each heald frame through which the reinforcing fiber bundle passes. It is preferable to do.
In this way, when adjacent warp yarns are sequentially arranged on different delivery rollers, it is possible to prevent uneven delivery amounts due to overlapping of the warp yarns on the delivery roll. In addition, by arranging warp yarns for each heald frame through which the reinforcing fiber bundle passes, it is possible to align the warp yarn sending amount for each heald frame, and to reduce tension fluctuations that occur when the heald frame is raised and lowered. Because it can.

  Further, the present invention can be applied not only to the three original structures of plain weave, twill weave and satin weave, but also to changed structures such as warp weave. In the present invention, 2 to 4 reinforcing warps are used as warp weave. It is also possible to apply to a fiber bundle that has been aligned. Here, one warp when two to four reinforcing fiber bundles are aligned to form a single warp is obtained by arranging two to four reinforcing fiber bundles in the same state.

  As described above, adjacent warp yarns are arranged by using a plurality of delivery rollers and arranging adjacent warp yarns in order on different delivery rollers, or by arranging them sequentially for each heald frame through which the reinforcing fiber bundle passes. Are guided to different delivery rollers, so that even if the yarn width increases after the first warp yarn width regulating step, it is possible to prevent warp yarns from overlapping on the delivery roller. Even when 2 to 4 reinforcing fiber bundles are aligned, the tension fluctuation that occurs when the heald frame is raised and lowered can be reduced, and the warp resulting from the warp yarn length difference of the present invention can be reduced. The effect of improving the tackiness and weft thread meandering can be exhibited.

  As another preferred embodiment of the feeding process of the reinforcing fiber bundle, the warp yarn sheet is brought into contact with the nip roller 7a having a nip mechanism and interlocking with the rotation of the main shaft of the loom at an angle of less than 90 °, and the other nip roller 7b. A mode in which the reinforcing fiber bundle is sent out by feeding the warp yarn sheet to the weaving process by rotating the nip rollers 7a and 7b in conjunction with the rotation of the loom main shaft while nipping is mentioned. In such an embodiment, when the nip roller 7a that is interlocked with the rotation of the loom main shaft is brought into contact with the nip roller 7b and niped by the nip roller 7b, the contact angle of the warp yarn sheet with the nip roller 7a is small. When the arrangement position of the warp yarns 2 is deviated and correction is required, the warp yarns 2 are prevented from loosening at the start of weaving by feeding out the nips of the warp yarns 2 in a temporarily released state and then nipping again. This is preferable because the displacement of the reinforcing fiber fabric in the width direction can be corrected quickly.

  Still another preferred embodiment of the delivery process in the present invention will be described with reference to FIG. FIG. 4 is a partial schematic side view showing another preferred example of the sending means of the warp supply device applied to manufacture the reinforcing fiber fabric according to the present invention. When the reinforcing fiber bundle feeding means shown in FIG. 4 is applied, the roller groups 41 and 42 are used, and the tension roller 40 that aligns the feed amount of the warp yarn 2 by friction with the warp yarn 2 is provided and guided through the guide roller 41. The warped yarn 2 is preferably guided to the weaving process through the guide roller 42 while being in contact with the tension roller 40. When applying the delivery means of this aspect, the tension roller 40 preferably has a diameter of 200 to 500 mm and a contact angle in the range of 90 to 270 °. In the delivery process using such delivery means, It is preferable to send the warp yarn sheet to the weaving process by bringing the warp yarn 2 into contact with the tension roller 40 so that the warp yarn 2 does not slip, and rotating the tension roller 40 in conjunction with the rotation of the main shaft of the loom.

  Thus, when the delivery means shown in FIG. 4 is used, the tension roller 40 has a large diameter of 200 mm or more, so that even if the adjacent warp yarns overlap for some reason, the tension roller center It is preferable because the difference in the yarn length due to the difference in the radius of curvature from to the center of the reinforcing fiber yarn bundle can be reduced. From this point of view, it is more preferable that the diameter of the tension roller 40 is larger. However, if the diameter exceeds 500 mm, workability problems such as handling of the tension roller 40 occur, so the diameter of the tension roller 40 is in the range of 200 to 500 mm. It is preferable to do.

  If the contact angle to the tension roller 40 is less than 90 °, the tension roller slips easily, and if the contact angle exceeds 270 °, there is no problem of slippage in the tension roller, but it is difficult to regulate the yarn path. The contact angle is preferably in the range of 90 ° to 270 °.

  Furthermore, it is preferable that the tension roller 40 is rotated in accordance with the rotation of the main shaft of the loom, thereby reducing the tension acting on the warp yarn 2 and preventing the occurrence of fluff due to over tension. For this reason, here, the tension roller 40 that aligns the feed amount of the warp yarn 2 by friction with the warp yarn 2 is provided, the diameter of the tension roller 40 is 200 to 500 mm, and the contact angle is 90 to 270 °. In this range, the warp yarn 2 is brought into contact with the tension roller 40 so that the warp yarn 2 does not slip, and the tension roller 40 is rotated in conjunction with the rotation of the main shaft of the loom to feed the warp yarn sheet to the weaving process. It is preferable to have an embodiment having As described above, the reinforcing fiber bundle delivery means in the reinforcing fiber bundle delivery process includes a mechanism in which at least one roller is a driving roller, so that the reinforcing fiber bundle is sent out by the rotation of the driving roller. 2 can reduce the tension acting, and can prevent the occurrence of fluff due to over tension.

  The reinforcing fiber bundle delivery means in the present invention includes (b) the angle formed by the shaft center of the most downstream guide roller of the first yarn width regulating means of the reinforcing fiber bundle and the nip portion of the nip roller, and the weaving means. The nip rollers 7a and 7b that rotate in conjunction with the rotation of the loom main shaft are arranged at positions where the angle between the shaft center of the most upstream guide roller and the nip of the nip roller is less than 90 °. It is preferable that Thus, (b) the angle formed by the shaft center of the most downstream guide roller of the first yarn width regulating means of the reinforcing fiber bundle and the nip portion of the nip roller, and the shaft center of the most upstream guide roller of the weaving means By having a mechanism for feeding out a bundle of reinforcing fibers in which nip rollers that rotate in conjunction with the rotation of the loom main shaft are arranged at positions where the angle between the nip and the nip of each nip roller is less than 90 °. The frictional resistance between the fiber bundle and the roller can be reduced, and the nip is temporarily released at the start of weaving, so that the alignment of the warp yarn 2 and the adjustment of the warp yarn tension are facilitated by causing the roller and warp to slip. It is preferable because it can be made.

  As another preferred configuration of the reinforcing fiber bundle sending means, the reinforcing fiber bundle sending means includes a tension roller 40 having a diameter of 200 to 500 mm, and (b) a reinforcing fiber bundle yarn width regulating means a on the most downstream side. The angle formed between the shaft center of the guide roller and the shaft center of the tension roller 40 and the angle formed between the shaft center of the uppermost guide roller of the weaving means and the shaft center of the tension roller 40 are both 90 to 90 °. The structure which has the means to send out the reinforcing fiber bundle by which the tension roller 40 that rotates in conjunction with the rotation of the loom main shaft is arranged at a position in the range of 270 ° can be mentioned.

  As described above, by increasing the diameter of the tension roller to 200 mm or more, even if the yarn thickness varies due to the overlap of the reinforcing fiber bundles for some reason, the center of the reinforcing fiber yarn bundle from the center of the tension roller The yarn length difference due to the difference in curvature radius up to can be reduced. For this reason, it is preferable that the tension roller diameter is large. However, if the diameter exceeds 500 mm, workability problems such as handling of the tension roller occur. Therefore, the tension roller diameter is preferably in the range of 200 to 500 mm.

  Further, if the contact angle to the tension roller 40 is less than 90 °, the tension roller slips easily, and if it exceeds 270 °, there is no problem of slipping in the tension roller 40, but it is difficult to regulate the yarn path. Therefore, the contact angle is preferably in the range of 90 ° to 270 °.

  Further, it is preferable that the tension roller 40 is rotated in accordance with the rotation of the main shaft of the loom so that the tension acting on the warp yarn 2 can be reduced and the occurrence of fluff due to over tension can be prevented.

  For this reason, the warp yarn sheet is sent to the weaving process by rotating the feed roller to the feed roller having a diameter of 200 to 500 mm interlocked with the rotation of the main shaft of the loom so that the contact angle is in the range of 90 to 270 °. It is preferable that In the present invention, it is preferable to have the following (D) second yarn width regulating step between the feeding step and the weaving step of (C).

(D) The second yarn width regulating step that regulates the yarn width on the contact roller so that the reinforcing fiber bundles do not overlap in the thickness direction In the present invention, between the feeding step and the weaving step of the reinforcing fiber bundle, Further, by having the second yarn width regulating step, it is possible to prevent the warp yarns from overlapping between the sending step and the weaving step, and to eliminate the occurrence of a difference in the yarn length of the plurality of warp yarns 2 more stably. Can do.

  That is, in the present invention, in the first yarn width regulating step of the reinforcing fiber bundle, the yarn width is regulated while maintaining the arrangement position, and the second yarn of the next step sandwiching the feeding step of the reinforcing fiber bundle is further sandwiched. By regulating the yarn width while maintaining the arrangement position in the width regulating step, the yarn widths of the reinforcing fiber bundles can be more stably aligned. For this reason, a plurality of warp yarns 2 having the same width are guided to the reinforcing fiber bundle feeding step, and the warp yarns 2 are warped in a state where a plurality of warp yarn lengths are aligned through the second reinforcing fiber bundle sending step. It can lead to the weaving process.

  As the second yarn width regulating means in the second yarn width regulating step of the reinforcing fiber bundle, a plurality of bars or wires are arranged perpendicularly to the warp yarn conveying surface in the same manner as the first yarn width regulating means. And the 2nd thread width control means of the reinforcing fiber bundle by which at least 1 roller is arrange | positioned horizontally is mentioned. The warp yarn width can be regulated by guiding the warp yarn to the horizontal guide bar while bringing the warp yarn into contact with a plurality of bars or wires.

  In the second yarn width regulating means for regulating the yarn width, a plurality of bars or wires are arranged at equal intervals perpendicular to the warp yarn conveyance surface, and if the bar has a substantially circular cross section, the diameter of the bar is changed to a rectangular cross section. By adjusting the outer dimensions of the bar, the width of the warp yarn passing between adjacent bars or between the wires can be regulated.

  A typical example of the second yarn width regulating means is the aforementioned comb.

  In addition, the contact roller here is a final horizontal roller up to the weaving process in the case where the tension adjusting mechanism by easing described later is not included, and in the case of having the tension adjusting process by easing, It is the first horizontal roller in the tension adjustment process.

  In the weaving step, the warp yarn 2 (2a, 2b) derived from the feeding step of the reinforcing fiber bundle is opened, and the weft yarn 11 unwound from the weft yarn bobbin 10 is driven into the shed to weave the reinforcing fiber fabric 13. To do. The reinforcing fiber fabric 13 is taken up while being in contact with the take-up guide rollers 15, 16, 18 and the take-up roller 17, and is taken up by the winding core 19 to become a roll 20.

  As a method for inserting the weft thread 11 from the shed, the weft thread 11 unwound from the weft bobbin 10 is driven by means such as a shuttle, rapier, gripper, air jet or water jet. The weft thread 11 is then beaten by the scissors 12, the heald frames (9a, 9b) move up and down again to close, and the reinforcing fiber fabric 13 is woven. In general, in the weaving process, the plurality of warp yarns 2 are moved at the opening and closing movements for each heald frame (9a, 9b) for inserting the weft yarns, resulting in fluctuations in tension. If there is a difference, tension is extremely applied to the yarn having a short yarn length. However, the warp yarn 2 to which excessive tension is applied increases the amount of feed and the difference in the yarn length becomes remarkable. In the present invention, by having the first yarn width regulating step, as described above, the yarn length difference of the warp yarn 2 is suppressed, so that this yarn length difference is suppressed from increasing in the main weaving step. In the method for producing a reinforced fiber fabric of the present invention, it is also preferable to provide a pressing guide 14 for pressing the warp yarn 2 over the entire width in the transverse direction of the warp sheet at the opening and closing port of the warp sheet in this weaving step. By using the pressing guide 14, it is possible to prevent the weft thread 11 from bending and meandering when the weft thread 11 having a fineness and a small bending rigidity is used and the tension at the opening and closing of the warp thread 2 is superior. To preferred.

  Here, as the weaving means, there are opening means for opening the warp yarn 2 and weft thread driving means for driving the weft thread 11 through the shed. It is an object of the present invention to provide a method for manufacturing a reinforcing fiber fabric and an apparatus for manufacturing the same, which can suppress the occurrence of wobbling and weft meandering of the reinforcing fiber fabric and exhibit excellent mechanical characteristics when FRP is used. A reinforcing fiber is used for the warp yarn 2.

Moreover, as a preferable embodiment in the present invention, the following step (E) is provided between the sending step (C) and the weaving step. (In the case of having the second yarn width regulating step of (D), it may be either before or after (D))
(E) Tension adjustment step by easing, which has a mechanism for translating the contact roller through which the reinforcing fiber bundle passes and the roller shaft of the tension fluctuation due to the opening and closing port of the later-described heald frame to the aligned reinforcing fiber bundle. In the tension adjusting process of the reinforcing fiber bundle, the contact roller (easing roller) detects the tension fluctuation of the reinforcing fiber bundle by the opening / closing port of the heald frame (9a, 9b) with respect to the warp yarn sheet derived from the feeding process of the reinforcing fiber bundle. It is more preferable because the tension acting on the reinforcing fiber bundle can be adjusted by relaxing by an easing mechanism that translates in parallel with the roller shaft, and leading to the next weaving process through the guide roller 8.

  By having the tension adjusting step by the easing mechanism, local warp of the warp yarn 2 due to excessive tension action on the warp yarn 2 when the weft yarn 11 is inserted in the next weaving step can be suppressed. As a result, weft meandering and warp fluff generation can be prevented.

  In another preferred embodiment of the present invention, each heald frame (9a, 9b) of the warp yarn 2 is brought into contact with a different easing roller, and each of these rollers is independently tensioned by an easing mechanism by parallel movement with the roller shaft. Means for making adjustments are included. By doing in this way, since tension adjustment can be performed for every heald frame which moves up and down, it is preferable from being able to relieve | moderate tension fluctuation stably also in any woven structure.

  Examples of the reinforcing fibers used in the present invention include carbon fibers, glass fibers, and aramid fibers. As the reinforcing fiber, a carbon fiber excellent in specific strength and specific elastic modulus is preferable. Among them, a polyacrylonitrile-based carbon fiber having a fiber diameter of 5 to 10 μm, a tensile strength of 3 to 7 GPa, and a tensile elasticity. By using a multifilament (fiber bundle) with a rate of 200 to 500 GPa, FRP exhibiting higher mechanical properties can be obtained.

  The total fineness of the carbon fiber bundle preferably used in the present invention as the warp or weft is preferably in the range of 400 to 5,000 tex. When the total fineness is within this range, in the case of a carbon fiber bundle having a large fineness exceeding 400 tex, the effect of preventing the warp yarns from overlapping is remarkably exhibited, and the effect of the present invention is sufficiently exhibited. In addition, since the carbon fiber bundle can generally reduce the manufacturing cost as the total fineness increases, there is also an advantage that a low-cost reinforcing fiber woven fabric substrate can be provided.

If the total fineness of the carbon fiber bundle is less than 400 tex, the influence of warp yarn overlap is not likely to occur, and the number of warp yarn bending points increases. The influence of the difference is alleviated, and it becomes difficult for the occurrence of unevenness and weft thread meandering, and the significance of the present invention tends to be dilute. In addition, when the total fineness exceeds 5,000 tex, it is not impossible to uniformly regulate the yarn width, but it is difficult to obtain a reinforced fiber fabric with uniform fiber dispersion, and strengthening that fully exhibits the mechanical properties. It may be difficult to obtain a fiber fabric, which is not preferable.
The number of multifilaments is preferably about 6,000 to 75,000.

The reinforcing fiber fabric produced in the present invention may be a so-called bidirectional fabric in which reinforcing fiber yarns are arranged in two directions, but is a so-called unidirectional fabric using auxiliary yarns in the weft yarn, And it is preferable that it is the reinforced fiber fabric whose total fineness of a weft is 1/10 or less of the total fineness of a warp. The reason is that the auxiliary yarn is for integrating the reinforcing fiber bundles arranged in the warp direction so as not to disperse, and therefore it is preferable that the auxiliary yarn is as thin as possible within such a range. In this case, the total fineness of the weft yarn is small, so that the bending rigidity is small, and the reinforced fiber woven fabric is likely to become noticeable due to the warp yarn length difference, and the effect of the present invention is effectively exhibited.
The auxiliary yarn material can be selected from polyester fiber, nylon fiber, polyaramid fiber, vinylon fiber, glass fiber, carbon fiber, etc., and low-melting nylon fiber is aligned and covered with glass fiber. A composite yarn may be used.

  Moreover, when using a reinforced fiber for a weft, it is preferable that it is the form of the unidirectional fabric using the thread | yarn which has the total fineness of 1/5 or less of a warp among the above-mentioned thing. When the weft is thinner than the warp, the meandering and bending of the weft are particularly prominent, which is preferable because the effects of the present invention can be exhibited to the maximum.

  The woven fabric structure used in the present invention is not particularly limited, but is a plain weave, twill weave, satin weave, or non-crimp structure (a reinforced fiber yarn is oriented straightly, and a warp and weft auxiliary yarn). And the like are preferably used.

The reinforcing fiber woven fabric obtained by the present invention is used as a reinforcing material for FRP used in other general industries including repair and reinforcement of structures, transportation equipment (automobiles, ships, aircraft, bicycles, etc.), sporting goods and FRP types. Preferably used.
Hereinafter, the present invention will be described using examples. In addition, Examples 1-4 and 6-8 are reference examples.

Example 1
As a warp yarn (reinforced fiber bundle), a yarn (total fineness: 800 tex) made of a polyacrylonitrile (PAN) -based carbon fiber bundle having a tensile strength of 4,900 MPa, a tensile modulus of 230 GPa, and a filament number of 12,000 is used. As the weft, glass fiber yarn ECE225 1/0 (total fineness: 22.5 tex) was used. Using the apparatus shown in FIG. 1, a unidirectional fabric A in which only warp yarns were composed of carbon fiber bundles was produced by the following procedure.
(A) In the positioning step of the reinforcing fiber bundle, first, a plurality of warp yarns 2 drawn from the reinforcing fiber bobbin 1 are used to form a warp yarn of a reinforcing fiber fabric so that the arrangement density becomes 2.5 / cm using a comb 3. Were positioned so as to be substantially equally spaced.
(B) In the first yarn width regulating step of the reinforcing fiber bundle, the warp yarn 2 led from the positioning step is passed through a guide bar arranged in parallel to the warp yarn conveying surface as shown in FIG. The yarn width was regulated so that the yarn width was 3.5 mm. The metal guide bars used here were all guide bars with a diameter of 2 mm.
(C) In the feeding step of the reinforcing fiber bundle, the warp yarn led from the first yarn width regulating step of the reinforcing fiber bundle is nipped by two nip rollers (7a, 7b) having a diameter of 15 cm so that the warp yarn does not slip. It was sent out to be the same as the loom take-up speed. The nip roller was a roller in which one (7a) was metal and the other (7b) was coated with hard urethane rubber, and the contact angle of the warp to the nip roller was 10 °.
In the weaving process, the warp yarns led from the feeding process of the reinforcing fiber bundles were divided and passed through the respective healds (9c, 9d) of the two heald frames (9a, 9b). And when the warp thread (2a, 2b) passed through the respective healds of the two heald frames (9a, 9b) is opened, the rapier has a density of 3.0 / cm by rapier, The weft yarn 11 unwound from the weft bobbin 10 is driven and beaten with the scissors 12, so that a reinforced fiber fabric 13 having a plain structure with a carbon fiber basis weight of 200 g / m ² is woven, and take-up guide rollers 15 and 16, take-up rollers 17 and the take-up guide roller 18, the reinforcing fiber fabric 13 was wound around the winding core 19 to obtain a roll 20. Here, no overlap of adjacent warp yarns on the delivery roller was observed.

  In the obtained unidirectional fabric A, since the yarn width was regulated before the warp yarn was guided to the nip roller, there was no overlap of the warp yarn on the nip roller. No meandering (texture collapse) of the weft was observed at all. A schematic plan view of the obtained unidirectional fabric A is shown in FIG. In FIG. 5, the weft yarns 51 are aligned at equal intervals without meandering with respect to the carbon fiber bundle 52 of the warp yarn, and no collapse of the structure is observed.

(Example 2)
A unidirectional fabric B was obtained in the same manner as in Example 1, except that (D) the second yarn width regulating step was provided between the feeding step and the weaving step of (C) the reinforcing fiber bundle in Example 1. .

  Here, (D) in the yarn width regulating step of the second reinforcing fiber bundle, the warp yarn 2 led from the sending step is perpendicular to the warp yarn conveyance surface in the same manner as in the first yarn width regulating step of FIG. The yarn width was regulated so that the yarn width would be 3.5 mm through a guide bar arranged in parallel with the yarn. The metal guide bars used here were all guide bars with a diameter of 2 mm. In addition, the overlap of the adjacent warp yarns on the guide roller was not observed.

  The obtained unidirectional fabric B is provided with a yarn width regulating step before and after the nip roller, so that warp yarns do not overlap. In the reinforced fiber fabric after winding, No collapse) was observed.

Example 3
(E) A tension adjusting step by easing was provided between the feeding step and the weaving step of (C) the reinforcing fiber bundle in Example 1, and two feeding rollers and two easing rollers were prepared. Then, a unidirectional fabric C was obtained in the same manner as in Example 1 except that the reinforcing fiber bundles were arranged in order on the sending roller, the heald frame, and the easing for each heald frame.
Here, (E) In the tension adjusting step of the reinforcing fiber bundle by easing, the warp yarn sent out from the warp yarn sending step is brought into contact with a different easing roller for each heald frame, thereby changing the tension variation due to the opening and closing port of the warp yarn sheet. Relaxed.

  The obtained unidirectional fabric C has the yarn width controlled before the warp yarn is guided to the nip roller, so that the warp yarn does not overlap on the nip roller, and the tension variation due to the opening and closing port of the warp yarn sheet is reduced. Thus, in the reinforced fiber fabric after winding, no wrinkles and weft meandering (texture collapse) were observed at all.

Example 4
In Example 1, three adjacent reinforcing fiber bundles are aligned to form one warp, and three feeding rollers are prepared, and the three aligned reinforcing fiber bundles are sequentially arranged on different feeding rollers. Otherwise, the unidirectional fabric D was obtained in the same manner as in Example 1.

  In the obtained unidirectional fabric D, three reinforcing fiber bundles were aligned to form one warp thread, but adjacent reinforcing fiber bundles were sequentially arranged on different nip rollers, so that the warp threads overlap on the nip rollers. Neither stickiness nor weft meandering (texture collapse) was observed in the reinforcing fiber fabric after winding.

(Example 5)
Example 1 except that an opening and widening step (B-1) is provided between (A) the reinforcing fiber bundle positioning step and (B) the first yarn width regulating step (B-2) in Example 1. In the same manner as above, a unidirectional fabric E was obtained.
Here, in the fiber opening and widening step, the metal guide rollers (30a, 30b, 30c) in which the warp yarns 2 led from the positioning step are alternately arranged in the front-rear and vertical directions as shown in FIG. , 30d, 30e), the yarn width was expanded while contacting the warp yarn, and then the yarn width was adjusted in the first yarn width regulating step. The metal guide rollers used in the opening and widening steps were all guide rollers with a diameter of 30 mm. The obtained unidirectional fabric E is capable of eliminating the narrow yarn because the warp yarn is once opened and widened before the warp yarn is guided to the nip roller, and the width of the yarn is restricted. In the reinforced fiber fabric after winding, no sag and weft thread meandering (texture collapse) were not observed at all.

(Example 6)
In the reinforcing fiber bundle sending process of the reinforcing fiber bundle, the warp yarn was sent while being brought into contact with the tension roller 40 having a diameter of 300 mm instead of the nip roller so that the contact angle was 200 ° instead of the nip roller, as shown in FIG. A unidirectional fabric F was produced in the same manner as in Example 1.

  The obtained unidirectional fabric F can prevent warp yarns from being overlapped because the yarn width is regulated before guiding the warp yarns to the tension roller, and can be sent out without slipping the warp yarns by the tension roller. Thus, in the reinforced fiber fabric after winding, no wrinkles and weft meandering (texture collapse) were observed at all.

(Example 7)
In the weaving step, the unidirectional fabric G was formed in the same manner as in Example 1 except that a cylindrical pressing guide having a diameter of 10 mm for pressing the warp yarn over the entire width in the lateral direction of the warp yarn sheet was provided at the opening / closing port of the warp yarn sheet. Manufactured.

  The obtained unidirectional fabric G has a yarn width before the warp yarn is guided to the nip roller, so that the warp yarns do not overlap on the nip roller, and the warp yarn opening / closing port after the weft yarn is inserted. Since weft bending was suppressed by contact with the holding guide over the entire width of the warp yarn sheet, no sag and weft meandering (texture collapse) were observed in the reinforced fiber fabric after winding.

(Example 8)
For the warp and weft, a yarn (total fineness: 800 tex) made of a PAN-based carbon fiber bundle having a tensile strength of 4,900 MPa, a tensile modulus of 230 GPa, and a filament number of 12,000 is used as a reinforcing fiber. According to the procedure, a bi-directional woven fabric H in which the warp and the weft are composed of carbon fibers was produced.
(A) The reinforcing fiber bundle positioning step was performed in the same manner as in Example 1 except that the warp yarn density was 1.2 yarns / cm.
(B) The first yarn width regulating step of the reinforcing fiber bundle was performed in the same manner as in Example 1 except that the yarn width was regulated to 7.8 mm.
(C) The feeding process of the reinforcing fiber bundle was performed in the same manner as in Example 1.
In the weaving step, the same carbon fiber bundle as the warp yarn was used, and the weft density was 1.2 fibers / cm, and the carbon fiber basis weight was 190 g / m ^2. It carried out similarly.
The obtained bi-directional fabric H has a yarn width before the warp yarn is guided to the nip roller, so that the warp yarn does not overlap on the nip roller. No meandering (texture collapse) of the weft was observed at all.

(Comparative Example 1)
A unidirectional fabric I was produced in the same manner as in Example 1 except that the reinforcing fiber bundle positioning step and the first yarn width regulating step were not provided and the yarn width was not regulated.

  Since the obtained unidirectional fabric I does not regulate the warp yarn arrangement position and the yarn width, the warp yarns overlap on the guide roller, resulting in variations in yarn thickness. As a result of the warp yarn being niped and the warp yarn not being niped, a difference in yarn length was generated, and in the reinforced fiber fabric after winding, the squeezed and weft thread meander (texture collapse) occurred. A schematic plan view of the obtained unidirectional fabric I is shown in FIG. In FIG. 6, the weft 53 meanders with respect to the carbon fiber bundle 54 of the warp, and the collapse of the structure is observed.

(Comparative Example 2)
A unidirectional fabric J was produced in the same manner as in Example 1 except that the first yarn width regulating step of the reinforcing fiber bundle was not provided and the yarn width was not regulated.

  Since the obtained unidirectional fabric J does not regulate the warp yarn width, warp yarn overlap occurs on the guide roller, resulting in variations in yarn thickness. The warp yarn was not niped with the warp yarn, resulting in a difference in yarn length, and in the reinforced fiber fabric after winding, the yarn was wrinkled and the weft yarn was twisted (texture collapsed).

(Comparative Example 3)
A unidirectional fabric K was produced in the same manner as in Example 5 except that the first yarn width regulating step and the feeding means for reinforcing fiber bundles using nip rollers were not used.

  Although the obtained unidirectional fabric K restricted the warp yarn width, it did not have a warp yarn feeding process, and therefore the warp yarn feed amount was uneven, resulting in a yarn length difference and winding. In the later reinforced fiber fabric, weaving and weaving of the weft yarn (texture collapse) occurred.

  The results of the above Examples and Comparative Examples are summarized in Table 1.

  According to the method for producing a reinforced fiber fabric of the present invention, the warp yarn feed amount is obtained because the warp yarn is not overlapped on the roller in the sending step since the warp yarn is guided to the warp yarn sending step after regulating the width of the warp yarn. Therefore, the occurrence of warp yarn length difference can be suppressed, and the reinforcing fiber fabric can be prevented from becoming loose and the weft yarn meandering (texture collapse). The reinforcing fiber fabric obtained by the method for manufacturing a reinforcing fiber fabric according to the present invention has the reinforcing fibers oriented straight, so that when it is molded into FRP, it only exhibits mechanical properties such as high strength and elastic modulus. And excellent appearance quality can be achieved. Such a reinforced fiber fabric is suitably used as a reinforcing material for FRP used in other general industries including repair and reinforcement of structures, transportation equipment (automobiles, ships, aircraft, bicycles, etc.), sporting goods and FRP types. .

It is a schematic side view which shows an example of the apparatus applied to the manufacturing method of the reinforced fiber fabric of this invention. It is a schematic perspective view which shows an example of the yarn width control guide part applied to the manufacturing method of the reinforced fiber fabric of this invention. It is a schematic side view which shows an example of the guide roller part of the apparatus applied to the manufacturing method of the reinforced fiber fabric of this invention. It is a schematic side view which shows an example of the tension roller part of the apparatus applied to the manufacturing method of the reinforced fiber fabric of this invention. 1 is a schematic plan view showing a woven structure of a reinforcing fiber fabric manufactured according to Example 1. FIG. 5 is a schematic plan view showing a woven structure of a reinforcing fiber fabric manufactured according to Comparative Example 1. FIG.

Explanation of symbols

1: Reinforcing fiber bobbins 2, 2a, 2b: warp
3: Comb 4, 6, 8: Guide roller 5: Yarn width regulating guide 7a, 7b: Nip roller 9: Opening device 9a, 9b: Held frame 9c, 9d: Held 10: Weft bobbin 11: Weft 12: Reed 13: Strengthening Textile fabric 14: Pressing guides 15, 16, 18: Take-up guide roller 17: Take-up roller 19: Core 20: Scrolls 30, 30a, 30b, 30c, 30d, 30e, 30f, 30g:
Guide roller (oscillating roller)
40: tension roller 41, 42: guide roller 51, 53: weft 52, 54: carbon fiber bundle

Claims (11)

It has a weaving process in which reinforcing fiber bundles that become warp yarns are passed one by one through the healds assembled to a plurality of heald frames, and the warp yarns are opened by moving the heald frame up and down, and the weft yarns are driven into the hooks. A method for producing a reinforced fiber fabric, characterized in that a reinforcing fiber bundle is sent to a weaving step through the following steps (A) to (C), and the reinforcing fiber woven fabric having at least reinforcing fibers in the warp yarn Production method.
(A) Positioning step of aligning and aligning a plurality of reinforcing fiber bundles unwound from the reinforcing fiber bobbin at equal intervals in the width direction as warp yarns of a woven fabric (B-1) (B-1) Expanding the warp yarn width After the opening and widening step and the opening and widening step of (B-1) above, (B-2) narrowing the warp yarn width and aligning the warp yarn width , width not exceeding has been positioned in the positioning step interval for regulating the yarn width of the warp yarns, a plurality of reinforcing fiber bundles aligned first yarn width regulating step (C) said pull sheet-like warp with the delivery roller Sending process as a sheet to the weaving process Between the delivery process and the weaving process of the (C), comprising the step of following (D), the manufacturing method of the reinforcing fiber woven fabric according to claim 1.
(D) narrowing the yarn width of the warp, by aligning the yarn width of the warp, the re-regulating the yarn width of the warp in the width not exceeding positioning interval by the positioning steps (A), the second yarn width regulating Process In the delivery step (C), a plurality of delivery rollers are used, and adjacent warp yarns are sequentially arranged on different delivery rollers, or are arranged in order for each heald frame through which the reinforcing fiber bundle passes in the weaving step. The manufacturing method of the reinforced fiber fabric of Claim 1 or 2. The method for producing a reinforced fiber fabric according to any one of claims 1 to 3, wherein a bundle of 2 to 4 reinforcing fiber bundles is used as one warp. The feeding step of (C) has a mechanism for nipping the warp yarn sheet, and is fed by rotating the feeding roller by contacting the feeding roller interlocked with the rotation of the loom main shaft at an angle of less than 90 °. The manufacturing method of the reinforced fiber fabric in any one of Claims 1-4 which is. In the feeding step (C), the warp yarn sheet is brought into contact with a feeding roller having a diameter of 200 to 500 mm interlocked with the rotation of the main shaft of the loom in a range of contact angle of 90 to 270 ° to rotate the feeding roller. The manufacturing method of the reinforced fiber fabric in any one of Claims 1-4 which is a process to send out. A warp supply device installed between a creel mounting a reinforcing fiber bobbin and a weaving means of an apparatus for producing a reinforcing fiber fabric having reinforcing fibers in warp yarns, comprising the following means (a) to (c): A warp supply device characterized by that.
(A) Reinforcing fiber bundle positioning means in which a plurality of bars or wires are arranged perpendicular to the warp yarn conveying surface (b) (b-1) At least two or more of the central axes are parallel and not on the same horizontal plane (B-2) Plurality arranged perpendicularly to the warp yarn conveying surface, installed in the downstream of the opening and widening means of (b-1), Downstream of the first yarn width regulating means of the first yarn width regulating means (c) and (b) of the reinforcing fiber bundle comprising a bar or wire of the above and a roller arranged in parallel with at least one warp yarn conveying surface installed in the at least one roller delivery means of the reinforcing fiber bundle Ru Oh the drive roller After said delivery means (c), having a means of following (d), warp supplying apparatus according to claim 7.
(D) Second yarn width regulating means of the reinforcing fiber bundle in which at least a plurality of bars or wires are arranged perpendicular to the warp yarn conveyance surface. The warp yarn feeding device according to claim 7 or 8 , wherein the feeding means (c) comprises a plurality of feeding rollers. (C) The reinforcing fiber bundle sending means includes an angle formed by the shaft center of the most downstream roller and the nip portion of the nip roller in the yarn width regulating means a of the reinforcing fiber bundle, and the final step in the sending step of the reinforcing fiber bundle. and angle between the nip portion of the axial center and the nip roller guide rollers, the angle and a position of each less than 90 °, those of the configuration nip roller that rotates in conjunction with rotation of the loom main shaft is arranged, wherein Item 10. The warp supply device according to any one of Items 7 to 9. The feeding means for the reinforcing fiber bundle (c) comprises a tension roller having a diameter of 200 to 500 mm, which is formed by the axial center of the most downstream roller in the yarn width regulating means a of the reinforcing fiber bundle and the axial center of the tension roller. The angle and the angle formed by the shaft center of the final guide roller and the shaft center of the tension roller in the feeding step of the reinforcing fiber bundle are linked to the rotation of the main shaft of the loom at positions where they are in the range of 90 to 270 °, respectively. a tension roller that rotates is of configuration arranged Te, warp supplying apparatus according to any one of claims 7-9.

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