JPS61201063A - Production of fiber structure for reinforcing composite material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a fiber structure for reinforcing composite materials. The present invention relates to a method for manufacturing a fiber structure for reinforcing a composite material, which has good shape retention without the presence of fibrous materials, and has a high yarn lamination density.

■ Fibers such as glass fiber fabrics and carbon fiber fabrics are used as structural members of mechanical devices that require strength such as space vehicles, aircraft, automobiles, railway vehicles, and ships, or as building components of buildings. A composite material of synthetic resin reinforced by the structure is used. Furthermore, composite materials made of combinations of carbon fiber/carbon matrix, graphite fiber/carbon matrix, graphite fiber/graphite matrix, etc. are used as molding materials for structural members that require heat resistance of 1000° C. or higher.

Composite material molded products reinforced with such fiber structures are lightweight, and at the same time have extremely high specific strength and heat resistance, and their usefulness is not limited to the above-mentioned fields of application, but also in the flower industry. It is evaluated. The strength characteristics of such composite material molded products (for example, FRP and C-C composite) depend on the fiber content, fiber arrangement, and It is greatly influenced by organization, structure, matrix, etc. As a means for manufacturing these fibrous structures, for example, US Pat. No. 4,183
, No. 232, French Patent No. 2.440.49
No. 4, or Japanese Patent Application Laid-open No. 59-71.457457, etc. are disclosed.

[1<'1, ゝ]However, all of these known fiber structures for reinforcing composite materials have a low content ratio of reinforcing fibers, so they have difficulty in maintaining the necessary strength, and , a countless number of thread ends are cut and exposed on the end face, and as a result, when impregnated with thermosetting resin, thermoplastic resin, pitch, etc., the threads are pulled out and fall off, causing the fiber structure to lose its shape. Or, after the resin, pitch, etc. have hardened, it is necessary to cut the core part in order to remove the part where the deformation occurs. Additionally, machining is essential when manufacturing a composite material molded product having a complex shape, which also causes the problem of reduced strength.

The main object of the present invention is to solve the above-mentioned problems observed in conventional composite molded products, especially fiber structures used as reinforcing materials, and to produce a fiber structure for reinforcing composite materials. Our goal is to provide the following.

Another main object of the present invention is to have a unique structure that prevents the ends of the fiber threads constituting the base material from being exposed on the outer and inner surfaces of the composite material molded product reinforced with fiber materials. The object of the present invention is to provide a means for producing a fiber structure having the following characteristics.

In view of such an objective of the fortune telling, the present invention provides a plurality of yarn guide members (4) protruding from the substrate (5) at predetermined intervals, and
Spacers (6) are fixed in parallel between the yarn guide members (4), and spacers (6) are fixed along the yarn guide members (4).
), the first endless yarns (1) are arranged in a meandering manner in the axial direction of the substrate (5), and the first endless yarns (1) are arranged in a meandering manner on the thus obtained first yarn arrangement layer. winding and arranging the first endless yarn (1) under tension in the circumferential direction (Y-axis direction) of the substrate (5) with the direction (X-axis direction) and alignment direction different;
Combining the meandering arrangement and winding arrangement of the first endless yarn (1) along the first alignment direction (X-axis direction) and the second alignment direction (Y-axis direction) a predetermined number of times (n times) After that, the loop (2°) of the second endless yarn (2) is inserted into the yarn guiding member (4) from the lower side (4°) of the yarn guiding member (4).
4), and in this state insert the yarn guide member (4) into the thread guide member (4).
The second endless yarn (2) drawn out onto the top surface of the first endless yarn (1) stack is removed by pulling it out onto the top surface of the first endless yarn (1) stack. The third endless yarn (3) is inserted as a cannulated yarn into the loop (2°), and the second endless yarn (2) and the third endless yarn (3) form the first endless yarn. The gist of this invention is a method for manufacturing a fiber structure for reinforcing composite materials, which further tightens the laminations in (1) and improves the lamination density of the endless yarns forming the fiber structure.

Figures 1 to 3 are schematic explanatory diagrams when the method of the present invention is applied to the production of a cylindrical fiber structure. As shown in the figure, a plurality of yarn guide tubes (4) have their base ends inserted into support holes (7) of a cylindrical base plate (5), and extend radially and radially outward. It is supported so that it can move freely. Plate-shaped spacers (6) made of synthetic resin material or the like are arranged radially between two adjacent filamentous guide tubes (4), (4), and the spacers are arranged at their upper ends. The filamentous guide tubes (4), (4) are twisted along the
It is fixed to the substrate (5) by a fixing member such as a wire (8) extending in an annular shape between them.

In this state, while folding up and down along the lattice of the yarn guide tubes (4) and (4), the first endless fiber is aligned along the axis of the substrate (5) (X-axis direction), that is, in the direction perpendicular to the plane of the paper. Yarn (
1) is arranged in a meandering manner over one or more layers with a phase shift, and on the thus obtained layer of the first endless yarn (1), the first alignment direction (X-axis For example, the alignment direction (Y-axis direction) can be set to the substrate (5).
The first endless thread (1) is wound under tension so as to coincide with the circumferential direction of the thread.

In this way, the first endless yarn (1
) is repeated a predetermined number of times (n times) all around the spacer (6) and the substrate (5), and the spacer (6)
A laminate of the first endless yarn (1) is formed on top. The number of stacked layers of the first endless yarn (1) is selected by considering the compression allowance in advance so as to match the design dimensions of the fibrous structure that is the final product. When the lamination of the first endless yarn (1) is completed,
The process of inserting the second endless thread (2) is started. That is, as shown in FIG. 2, the spacers (6) are sequentially moved one by one along the axial direction (X-axis direction) of the substrate (5), and then the spacers (6) are moved one by one along the axial direction (X-axis direction) of the substrate (5). ) or upper side (4”
), that is, the loop (2゛),
In this state, the yarn guide tube (4) is pulled out from the stack of the first endless yarn (1), and the loop (2゛) locked on the yarn guide (9) is pulled out from the stack of the first endless yarn (1). ) in the X-axis direction,
That is, the stack is pulled up in the radial direction and the corresponding yarn guide tubes (4) are removed one by one.

Note that the first endless yarn (1) is aligned in the circumferential direction (Y
When twisting under tension along the axial direction),
The first endless yarn (1) in the axial direction (X-axis direction) of the substrate (5) is II! In the case of adopting an I-circular winding posture,
After winding horizontally perpendicular to the axis of the substrate (5), there are cases where the layer is shifted at the end of the winding to move on to the subsequent winding layer. After the loop (2') of the second endless yarn (2) is drawn out onto the stack of the first endless yarn (1) in this way, the third endless yarn is attached to the loop (2'). The thread (3) is inserted as a cannulated thread, and the second endless thread (2) and the third endless thread (3) are inserted into the first endless thread (1).
The additional tightening of the laminate of ) imparts force and increases the laminate density of the endless yarns forming the fibrous structure. That is, by inserting the third endless thread (3) as a cannulated thread through the loop (2°), and then applying a tensile force to the second endless thread (2) and pulling it back upward or downward, The yarn stack formed from the first endless yarn (1) is tightened in sequence. The second endless yarn (2) and the third endless yarn (3
) The above insertion and tightening operations are performed using the thread guide tube (
4) is repeated one by one for the number of yarns, thereby increasing the density of the yarns forming the fiber structure to a predetermined level required for reinforcing the composite material. By sequentially inserting the third endless yarn (3) into the loop (2゛) in this way, the third endless yarn (3) is wound around the upper or lower surface of the yarn stack. . The fibrous structure thus obtained is finished as a final product as it is, or after being impregnated with a thermosetting resin, thermoplastic resin, pinch or the like according to a conventional method.

As the endless yarn in the present invention, for example, aligned yarn or twisted yarn such as carbon fiber or silicon carbide fiber is used. In addition, the endless yarn in the present invention means a && fiber aggregate that can be regarded as a substantially continuous fiber yarn; It is also possible to use yarns with different thicknesses and fiber types depending on the arrangement direction.

Although the above examples illustrate specific embodiments of the present invention in the case where the fiber structure is a cylindrical body, the gist of the present invention should not be construed as being limited by such illustrative explanations.

In addition, in the above embodiment, the yarn guide member (4) is
The holding member of the yarn guide (9) and the second endless yarn (
2), but as an alternative, a loop (2') of the second endless yarn (2) is used in the side trunk as shown in Figure 4. It is also possible to use a rond-like thread-like guide member formed with a hook-like recess (9°) for locking.

FIGS. 5 to 8 are explanatory diagrams illustrating a fiber structure for reinforcing a composite material manufactured by the method of the present invention and its manufacturing process. Irregular spacers (6
), a disc-shaped spacer (6゛) or a flat cone cape-shaped spacer (6") is used, and the first endless yarn (1) and the second endless yarn (2) are placed on the irregularly shaped spacer.
) and the third endless yarn (3) is formed by meandering and winding methods, a curved surface corresponding to the shape and dimensions of the irregularly shaped spacer (6) is obtained.

That is, when producing a cone-cape-shaped fiber structure, disk-shaped spacers (6゛) having a multi-tiered stacked structure and having different diameters are fitted on the side circumferential surface of a cylindrical substrate (5), or cone By using a cape-shaped spacer (6') a cone-cape-shaped fibrous structure can be formed. FIG. 6 shows an example of manufacturing a spindle-shaped fiber structure.

In the embodiment shown in FIG. 6, the first endless yarn (1)
Although the alignment direction of the spacer (6) is restricted to the direction along the U-shaped surface of the spacer (6) and the direction perpendicular thereto, the lamination direction and the number of lamination stages of the first endless yarn (1) are limited by this example. For example, in the case of a cylindrical fibrous structure subject to internal pressure, the density of the threads in the Y-axis direction may be increased depending on the required strength and the direction in which the load is applied.

By employing the method of the present invention, it is possible to manufacture fiber structures having various shapes as shown in the figure, and the fiber structures can be laminated to increase the yarn lamination density. Since the product is tightened firmly and securely, the dimensional stability of the product is significantly improved compared to conventional methods. Furthermore, in the present invention, it is possible to arrange the yarns in the direction that requires the strength of the laminate, and furthermore, the yarn ends of the fiber yarns can be substantially exposed on the surface of the fiber structure. Therefore, there is no risk that the fiber structure will lose its shape due to the yarn being pulled out during transportation or during the resin impregnation process, and the core part will not be removed after the resin or pitch has hardened to correct the shape. There is no need to perform cutting on the material. Therefore, the present invention not only allows for free molding of composite materials having complex shapes, but also greatly contributes to preventing strength reduction due to machining.

[Brief explanation of the drawing]

1 to 3 are schematic illustrations of the method of the present invention. FIG. 4 is a perspective view illustrating different embodiments of the yarn guide member, and FIGS. 5 to 8 are explanatory views illustrating specific examples of the method of the present invention. (1)---First endless yarn, (2)---Second endless yarn, (3)---Third endless yarn, (2'')---
Second endless yarn loop, (4) -- Yarn guide member,
(5) --- Substrate, (6) --- Spacer, (X)
(Y) ・ (Z>-・Alignment direction of threads. Procedural amendment Applicable Patent Office Commissioner Manabu Shiga 1, Indication of case Patent Application No. 39033 of 1985 2, Title of invention Fiber structure for reinforcing composite materials Body manufacturing method 3
,? ! Relationship with the case of the person making the correction Patent applicant name: Shikishima Canvas Co., Ltd. 4, agent: 550 Aki Address: 1-15-26 Edobori, Nishi-ku, Osaka-shi, Osaka Prefecture Specification and drawings 6, Amendment details 1, Title of the invention: Method for manufacturing a fiber structure for reinforcing composite materials 2, Claims (1) A plurality of thread guide members are provided protruding from a substrate at predetermined intervals, and between the thread guide members. Spacers are fixed in parallel, and a first endless yarn is arranged in a meandering manner in the axial direction of the substrate on the spacer along the yarn guide member, and the thus obtained first yarn arrangement layer is The first endless yarn is wound and arranged on the substrate under tension in a circumferential direction of the substrate in a different alignment direction from the first alignment direction, and the first endless yarn is wound and arranged in a tensioned manner in a circumferential direction of the substrate, and the first endless yarn is wound along the axial direction and the circumferential direction of the substrate. The combination of the meandering arrangement and the winding arrangement of the first endless yarn is repeated a predetermined number of times, and after that, the loop of the second endless yarn pulled out at the same time as the first endless yarn is attached to the loop of the second endless yarn. The endless thread of the second endless thread and the third
A method for manufacturing a fiber structure for reinforcing a composite material, comprising further tightening the first stack of endless yarns using the endless yarns. (2) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the substrate has a cylindrical shape. (3) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the substrate has a truncated cone shape. (4) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the substrate has a half-drum shape or a cone-cape shape. (5) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the plurality of spacers have the same shape and dimensions. (6) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the plurality of spacers have different shapes and dimensions. 3. Detailed Description of the Invention The present invention relates to a method for manufacturing a fiber structure for reinforcing composite materials, and more specifically, the present invention relates to a method for manufacturing a fiber structure for reinforcing composite materials, and more specifically, the present invention relates to a method for producing a fiber structure for reinforcing composite materials, and more specifically, a fiber structure in which cut ends of the threads are substantially present on the end surface of the fiber structure. The present invention relates to a method for producing a fiber structure for reinforcing a composite material, which has good shape retention and a high yarn lamination density. Traditionally, it has been used as a component of mechanical equipment that requires strength such as spacecraft, aircraft, automobiles, railway vehicles, ships, etc., or as a construction member of buildings, using fiber structures such as glass fiber fabrics and carbon fiber fabrics. A reinforced synthetic resin composite is used. Furthermore, composite materials made of combinations of carbon fiber/carbon matrix, graphite fiber/carbon matrix, graphite fiber/graphite matrix, etc. are used as molding materials for structural members that require heat resistance of 1000° C. or higher. Composite molded products reinforced with such fiber structures are lightweight and at the same time have extremely high strength and flexibility, and are used not only in the above application fields but also in various industrial fields. Its usefulness has been evaluated. The strength characteristics of such composite molded products (for example, FRP and C-C composites) depend on the fiber content, fiber arrangement, texture, or It is greatly affected by the structure etc. As means for manufacturing these fibrous structures, for example, US Pat. ing. However, the fiber structure described in the above-mentioned U.S. patent has drawbacks in that the dimensions are restricted and the cut ends of the yarns are exposed in the direction perpendicular to the fiber lamination plane. Furthermore, the fiber structure described in the French patent has the drawbacks of dimensional limitations and exposure of the cut ends of the threads in the radial direction relative to the fiber lamination surface. Furthermore, JP-A-5
The fibrous structure described in Japanese Patent No. 9-71457 also suffers from the same problem as the above-mentioned size restriction. In addition, all of the above-mentioned fiber structures for reinforcing composite materials have a low content ratio of reinforcing fibers, so it is difficult to maintain the necessary strength. The threads are exposed in the cut state, and therefore, when impregnated with thermosetting resin, thermoplastic resin, pitch, etc., the threads may fall off and the fiber structure may lose its shape, or the portion where the shape loss occurs may be removed. In order to remove it, it is necessary to cut the core after the resin, pinch, etc. have hardened. Additionally, machining is essential when manufacturing a composite molded product having a complex shape, which also causes the problem of reduced strength. The main purpose of the present invention is to solve the above-mentioned problems observed in fiber structures used as reinforcing materials for conventional composite molded products, and to improve the size and shape without using special equipment. The object of the present invention is to provide a method for manufacturing a fiber structure for reinforcing composite materials without any restrictions. Another main object of the present invention is to provide a unique structural feature in which the ends of the fiber threads constituting the base material are not exposed on the outer and inner surfaces of the composite molded product reinforced with fiber material. An object of the present invention is to provide a means for manufacturing a fibrous structure having the following features. In view of the above purpose of occupying the space, the present invention provides a plurality of yarn guide members (4) protruding from the substrate (5) at predetermined intervals, and
Spacers (6) are fixed in parallel between the yarn guide members (4), and spacers (6) are fixed along the yarn guide members (4).
), the first endless yarns (1) are arranged in a meandering manner in the axial direction of the substrate (5), and the first endless yarns (1) are arranged in a meandering manner on the thus obtained first yarn arrangement layer. The alignment direction is different from the direction (X-axis direction) and the circumferential direction (Y-axis direction) of the substrate (5) is
The first endless yarn (1) is wound and arranged under tension, and the first endless yarn is wound along the first alignment direction (X-axis direction) and the second alignment direction (Y-axis direction). Repeating the combination of meandering arrangement and winding arrangement of row (1) a predetermined number of times (n times),
After that, insert the yarn guide (9) from the bottom or top of the yarn guide member (4), and move the yarn guide member (4) to the first
After pulling out the endless yarn (1) from the stack, the second endless yarn (2) loop (
2'') is pulled out onto the stack of the first endless yarn (1), and the loop of the second endless yarn (2) thus pulled out onto the stack of the first endless yarn (1). The third endless thread (3) is threaded through the thread (2) as a cannulated thread, and the second endless thread (2) and the third endless thread (3) form the first endless thread (1). ), and improves the lamination density of the endless yarns forming the fiber structure. 1 is a schematic explanatory diagram when the method of the present invention is applied to the production of a cylindrical fiber structure. When inserted into the support hole (7) of (5), it is supported so as to be movable radially and radially outward. Plate-shaped spacers (6) made of synthetic resin material or the like are arranged radially between them, and the spacers are twisted along the upper end of the thread-like guide tubes (4), (4).
It is fixed to the substrate (5) by a fixing member such as a wire (8) extending in an annular shape between them. In this state, the first endless yarn is folded upward and downward along the lattice of the yarn guide tubes (4) and (4) to extend in the axial direction (X-axis direction) of the substrate (5), that is, in the direction perpendicular to the paper surface. Article (1
) is arranged in a meandering manner over one or more layers with a phase shift, and on top of the layer of the first endless yarn (1) obtained in this way, the first alignment direction (X-axis For example, the alignment direction (Y-axis direction) is made to match the circumferential direction of the substrate (5), and the first endless yarn (
1) is arranged in a winding manner. In this way, the first endless yarn (1
) is repeated a predetermined number of times (n times) over the entire circumference of the spacer (6) to form a laminate of the first endless yarn (1) on the spacer (6). First endless yarn (1)
The number of stacking stages is selected by considering the compression allowance in advance to suit the design dimensions of the fiber structure that is the final product.When the first endless yarn (1) has been stacked, the second endless The thread (2) insertion process is started. That is, as shown in Fig. 82, the spacers (6) are sequentially moved one by one along the axial direction (X-axis direction) of the substrate (5) and then
) from the lower end side (4') or upper end side (4''), that is, from the lower surface side or upper surface side of the stack of the first endless yarn (1), guide the yarn into the yarn guide tube (4). Insert (9),
After pulling out the yarn guide tube (4) from the stack of the first endless yarn (1), the loop (2゛) locked on the yarn guide (9) is pulled out from the stack of the first endless yarn (1). on the stack, that is, in the radial direction (X-axis direction) of the stack. In addition, when winding the first endless yarn (1) under tension along the circumferential direction (Y) of the substrate (5), the first endless thread (1) is wound in the axial direction (X-axis direction) of the substrate (5). On the other hand, when the first endless yarn (1) takes a spiral winding posture, and after winding horizontally perpendicularly to the axis of the substrate (5), a step is formed at the end of the winding. There are cases where the mixture is shifted and transferred to the subsequent stirring layer. After pulling out the loop (2'') of the second endless yarn (2) onto the stack of the first endless yarn (1) in this way, the third endless yarn is inserted into the loop (2''). (3) is threaded through a keyaki thread as a cannulated thread, and the second endless thread (2) and the third endless thread (3) are used to additionally tighten the laminate of the first endless thread (1). It gives strength and improves the lamination density of the single unrefined yarn that forms the fiber structure. That is, after inserting the third endless thread (3) as a cannulated thread through the loop (2'), by applying a tensile force to the second endless thread (2) and pulling it back upward or downward, The yarn stack formed from the first endless yarn (1) is tightened in sequence. The second endless yarn (2) and the third
The above-mentioned insertion and tightening operation using the endless yarn (3) is repeated one by one for the number of yarn guide tubes (4), thereby increasing the density of the yarn forming the fiber structure to the point where the composite material is reinforced. Increase to the required predetermined level. Loop like this (
By sequentially inserting the third endless yarn (3) through the yarn layer 2'), the third endless yarn (3) is arranged in a protruding manner on the upper or lower surface of the yarn stack. The fibrous structure thus obtained can be made into a final product as it is or after being impregnated with a thermosetting resin, thermoplastic resin, pitch, etc. according to a conventional method. As the endless yarn in the present invention, for example, drawn yarn or twisted yarn such as carbon fiber or silicon carbide fiber is used. In addition, the term "endless yarn" in the present invention refers to a fiber aggregate that can be regarded as a substantially continuous fiber yarn; It is also possible to use yarns with different thicknesses and fiber types depending on the arrangement direction. Although the above examples illustrate specific embodiments of the present invention in the case where the fiber structure is a cylindrical body, the gist of the present invention should not be construed as being limited by such illustrative explanations. In addition, in the above embodiment, the yarn guide member (4) is
The holding member of the yarn guide (9) and the second endless yarn (
2), but as an alternative, a loop (2'') of the second endless yarn (2) is used in the side trunk as shown in Figure 4. It is also possible to use a rond-like thread-like guide member formed with a hook-like recess (9') for locking. 5 is an explanatory diagram illustrating a fiber structure for reinforcing materials and its manufacturing process. As illustrated in FIG.
), a disk-shaped spacer (6') or a flat cone cape-shaped spacer (6'') is used, and the first endless yarn (1) and the second endless yarn (2) are placed on the irregularly shaped spacer.
) and the third endless yarn (3) is formed by meandering and winding methods, a curved surface corresponding to the shape and dimensions of the irregularly shaped spacer (6) is obtained. That is, when producing a cone-cape-shaped fiber structure, disk-shaped spacers (6°) having a multi-tier stacked structure with different diameters are fitted on the side circumferential surface of the cylindrical substrate (5), or cone By using a cape-shaped spacer (6'), a cone-cape-shaped fiber structure can be formed. FIG. 6 shows an example of manufacturing a spindle-shaped fiber structure. In the embodiment shown in FIG.
) are restricted to the direction along the U-shaped surface of the spacer (6) and the direction perpendicular thereto.
The stacking direction and the number of stacked N stages of the endless yarn (1) are not limited by this example (for example, in the case of a cylindrical fiber structure to which internal pressure is applied, the density of the yarn in the Y-axis direction may be increased). The design conditions can be changed as appropriate depending on the required strength and the direction of load action.1) By adopting the method of the present invention, fiber structures having various shapes as shown in the figure can be produced. The fiber structure is laminated to increase the yarn lamination density and tightly tightened, so the morphological stability of the product is significantly improved compared to conventional methods. do. Furthermore, in the present invention, it is possible to selectively provide reinforcement of the yarns in the direction in which the strength of the laminate is required, and furthermore, the yarn ends of the fiber yarns can be provided on the surface of the fiber structure. Because they are virtually not exposed, the fiber structure will not lose its shape due to yarns falling off during transportation or during the resin impregnation process, and the resin or pitch will not be removed to correct the shape. There is no need to cut the core after hardening. Therefore, the present invention not only enables the free molding of composite materials having complex shapes using a simple method, but also greatly contributes to preventing the reduction in fineness caused by machining. 4. Brief Description of the Drawings Figures 1 to 3 are schematic illustrations of the method of the present invention. FIG. 4 is a perspective view illustrating different embodiments of the yarn guide member, and FIGS. 5 to 8 are explanatory views illustrating specific examples of the method of the present invention. (1)...-first endless yarn, (2)--second electroless yarn, (3)--third endless yarn, (2')--first endless yarn loop, (4) - Yarn guide member (5) - One substrate, (6) - Spacer, (9) Yarn guide, (X)
・ (Y) ・ <z) - System row direction. Procedural amendment 1. Display of the case 1985 Patent Application No. 39033 2 Name of the invention Method for manufacturing fiber structures for reinforcing composite materials 3 Person making the amendment Relationship to the case Patent applicant name Shikishima Canvas Co., Ltd. 4 Agent 8550 Address Address: 1-15-26 Edobori, Nishi-ku, Osaka-shi, Osaka Prefecture, Osaka Commercial Evil, Inc. Name (6458) Patent Attorney Sho Ehara 5, Subject of amendment: ■ In the specification of the applicant, the scope of the claims has been amended as follows: do. (1) A plurality of yarn guide members are provided protruding from the substrate at predetermined intervals, spacers are fixed in parallel between the yarn guide members, and spacers are placed on the spacers along the yarn guide members. A first endless thread is arranged in a meandering manner in the axial direction of the substrate, and on the thus obtained first thread arrangement layer, the alignment direction is different from the first arrangement direction, and the first endless thread is arranged in a meandering manner in the axial direction of the substrate. arranging the first endless yarn in a winding manner under tension in the circumferential direction;
The combination of meandering arrangement and winding arrangement of the first endless yarn along the axial direction and circumferential direction of the substrate is repeated a predetermined number of times, and then a yarn guide is inserted from the bottom or top of the yarn guide member. and, after pulling out the yarn guide member from the first stack of endless yarns, pulling out the loop of the second endless yarn locked to the yarn guide onto the first stack of endless yarns, A third endless yarn is inserted as a cannula yarn into a loop of a second endless yarn pulled out on a stack of first endless yarns, and the second endless yarn and the third endless yarn are connected to each other. A method for producing a fiber structure for reinforcing a composite material, which comprises further tightening the first stack of endless yarns. (2) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the substrate has a cylindrical shape. (3) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the substrate has a truncated cone shape. (4) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the substrate has a half-drum shape or a cone-cape shape. (5) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the plurality of spacers have the same shape and dimensions. (6) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the plurality of spacers have different shapes and dimensions. (7) ・ ・(' 3-na , -ask, ゛'s ν
Seal ＾ ・(2)
Spacer (cone-bun, -ru ゛・
-According to the law, according to the law -
'Lji Poetry j' Wamaru 01) Construction] Yu L-

Claims (6)

[Claims] (1) A plurality of yarn guide members are provided protrudingly on the substrate at predetermined intervals, spacers are fixed in parallel between the yarn guide members, and spacers are placed on the spacers along the yarn guide members. One endless yarn is arranged in a meandering manner in the axial direction of the substrate, and on the thus obtained first yarn arrangement layer, the first alignment direction and the alignment direction are made to be different from each other to form a circle on the substrate. The first endless yarn is wound in a winding arrangement under tension in the circumferential direction, and the combination of the meandering arrangement and the winding arrangement of the first endless yarn along the axial direction and the circumferential direction of the substrate is performed a predetermined number of times. After that, the loop of the second endless yarn is inserted into the inside of the yarn guide member from the lower part of the yarn guide member, and the loop of the second endless yarn is inserted into the upper surface of the stack of the first endless yarn. The third endless yarn is inserted into the loop of the second endless yarn pulled out on the upper surface of the stack of first endless yarns as a cannulated yarn, and the second endless yarn is removed. A method for manufacturing a fiber structure for reinforcing a composite material, which comprises further tightening a stack of first endless yarns by a third endless yarn. (2) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the substrate has a cylindrical shape. (3) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the substrate has a truncated cone shape. (4) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the substrate has a half-drum shape or a cone cape shape. (5) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the plurality of spacers have the same shape and dimensions. (6) The method for manufacturing a fiber structure for reinforcing a composite material according to claim 1, wherein the plurality of spacers have different shapes and dimensions.