JP6106309B1 - Reinforcing fiber structure and manufacturing method thereof - Google Patents

Abstract

The present invention provides a reinforcing fiber structure capable of efficiently producing a predetermined reinforcing fiber structure by integrally fusing a core member and reinforcing fibers, and having a high bending strength when bent, and a method for producing the same. SOLUTION: A core member 2 is coated with a reinforcing fiber 3 in which a heat-bonding yarn is covered with a core yarn of the reinforcing fiber 3 by pressure bonding, welding or firing. Since the reinforcing fiber 3 is provided with a bag-like portion 3a formed by bag weaving and knitting, the core member 2 is put and coated by crimping, welding or firing, so that the heat-sealed yarn is melted by thermocompression bonding or the like. Then, fusion bonding is performed on the core member. [Selection] Figure 1

Description

  The present invention relates to a reinforced fiber structure in which a metal member, a fiber reinforced plastic member, a fiber reinforced ceramic member, a fiber reinforced glass member, or the like is pressed, welded, or fired on a reinforced fiber and processed into a predetermined thickness or a predetermined shape. It relates to the manufacturing method.

  Carbon fiber (carbon fiber) is lightweight, has high strength, and has a high elastic modulus, and is used as a base material for aircraft structural members, automotive parts, prepregs for sports / leisure products, and laminated materials. Carbon fiber is a fiber made by carbonizing acrylic fiber or pitch (by-products such as petroleum, coal and coal tar) at a high temperature. Reinforcing fibers using acrylic fibers are classified as PAN (Polyacrylonitrile), and reinforcing fibers using pitch are classified as pitch (PITCH). Reinforcing fibers are rarely used as a single material, and are mainly used as a composite material combined with a base material such as a synthetic resin. Examples of composite materials using reinforcing fibers include reinforced (fiber) plastics and reinforced fiber reinforced carbon composite materials. Reinforced (fiber) plastic is a plastic product formed by adding glass fiber, nylon, vinylon, etc. as a reinforcing material. It is resistant to impact and is widely used in automobile bodies, boats, airplane hulls, building materials, helmets, fishing gear, etc. ing.

For example, Patent Documents 1 to 4 have already been disclosed as composite materials of reinforcing fibers.
Patent Document 1 discloses a backrest for an aircraft seat composed of a sandwich plate having a carbon fiber reinforced composite material on both surfaces of a resin non-combustible or flame retardant honeycomb core.
Patent Document 2 states that “(Claim 1) is a rod-shaped or cylindrical preform material that is placed in a mold before casting and cast with a matrix metal to form a fiber-reinforced metal composite material. An inner layer composed of reinforcing fibers in which the fiber axes are aligned in a direction coinciding with the axial direction, and a tubular braid or tubular woven body of reinforcing fibers covering the inner layer (hereinafter, both are collectively referred to as a tubular woven / knitted fabric) And a coating material comprising a plurality of layers alternately stacked with each other), and (claim 2) the outermost layer is a coating layer. Preform material. (Claim 3) The reinforcing fiber constituting the inner layer is a reinforcing fiber, and the tubular woven / knitted fabric constituting the covering layer is knitted or woven with a bag knitted or woven with a fiber crossing angle of 10 to 45 degrees. The preform according to claim 1, wherein the preform is a tubular woven fabric. Is disclosed.
In Patent Document 3, a tubular metal alloy and an FRP prepreg are bonded to each other to form a lightweight and strong structure corresponding to tensile stress and compressive stress (problem). The outer peripheral surface of the metal component 60 has a roughness on the order of microns by chemical etching, and the surface thereof is observed with an electron microscope, and has a partition-like convex portion having a height or depth and width of 10 to 500 nm and a length of 10 nm or more. Alternatively, a groove-like recess is formed on the entire surface with a period of 10 to several hundred nm, and the surface thereof is a thin layer 21 of a metal oxide or metal phosphate, and this is a tubular fiber-reinforced plastic material. 61 is bonded by an epoxy resin agent 62 to form a tubular composite. ”The contents are described.
Patent Document 4 provides a technology excellent in practicality and productivity that can easily obtain a long slanted yarn fiber fabric used for a very large FRP product (problem). A method for manufacturing a fiber fabric for FRP, in which a mandrel 1 that is movable in the axial direction is inserted into a braider 2 having an oblique yarn supply unit 3, and the oblique yarn supply unit 3 is an outer peripheral surface of the mandrel 1. The oblique thread S is supplied to the mandrel 1 at a predetermined angle ± θ with respect to the axis of the mandrel 1. A plurality of oblique threads S are supplied from the oblique thread supply unit 3 to A tubular fabric 4 is woven on the outer peripheral surface, and then the tubular fabric 4 is cut in the axial direction of the mandrel 1 and the long oblique yarn fiber fabric 5 in which the plurality of oblique yarns S are disposed. "Manufacturing" is described.

No. 2-12912 JP-A-9-53132 JP 2008-307842 A JP 2001-310393 A

By the way, the carbon fiber (carbon fiber) has a specific gravity of about 1.8, and is very light, about 1/4 compared with 7.8 of iron, and lighter than 2.7 of aluminum. is there. The specific strength (value obtained by dividing tensile strength by specific gravity) of carbon fiber is 10 times that of iron, and the specific elasticity (value obtained by dividing tensile elastic modulus by specific gravity) is 7 times that of iron. For this reason, it is used as a prepreg for aircraft structural members and automotive parts, and as a base material for laminated materials. On the other hand, it is considered to be weak in bending strength and is not easily bent. In addition, when using carbon fiber for structures, such as a building structure, a motor vehicle, a ship, and an airplane, there exists a manufacturing method which piles up and crimps | bonds a plurality of carbon fibers. In addition, a technique of laminating a semi-cured sheet-form molding intermediate material (prepreg) in which carbon fibers are impregnated with a thermosetting resin has been proposed.
However, the method of laminating and bonding a plurality of carbon fibers is not sufficient in terms of hardness, and it takes time to manufacture a plurality of carbon fibers. (For example, Patent Document 1 has this problem).
Patent Documents 2 to 4 are composite materials of reinforcing fibers that are molded into a predetermined shape and mainly stronger (although it is a member that is strong in bending strength). For the one constituting the reinforced metal composite material (Patent Document 2), the one in which the tubular fiber-reinforced plastic material 61 is adhered by the epoxy resin agent 62 (Patent Document 3), and the braider 2 having the oblique yarn supply unit 3 For example, a mandrel 1 that can move in the axial direction is inserted (Patent Document 4), and its manufacturing method is difficult.
In addition, when disposing of fiber reinforced composite materials such as Patent Documents 1 to 4, even if they are incinerated, it is impossible to disassemble and treat them in a state where inorganic materials and organic materials are mixed. Has remaining problems.

  Accordingly, an object of the present invention is to efficiently manufacture a reinforcing fiber structure in which a core member and a reinforcing fiber are integrally fused and can be efficiently manufactured. If bending is performed, the bending strength is enhanced and the decomposition process is easy. An object of the present invention is to provide a reinforcing fiber structure and a method for manufacturing the same.

The present invention is characterized in that the core member is covered by pressure bonding, welding, or firing with a reinforcing fiber in which a heat-sealing yarn is covered with a core yarn of the reinforcing fiber.
According to the present invention, the core member and the reinforcing fiber are integrated with each other (the core fiber and the reinforcing fiber are melted together to melt the core so that the heat-sealing yarn melts and adheres to the core member at the time of pressure bonding, welding, or firing. A reinforcing fiber structure having a predetermined size and thickness can be easily manufactured. That is, since the heat-sealing yarn is melted and bonded to the core member by thermocompression bonding or the like, a reinforcing fiber structure in which the core member and the reinforcing fiber are integrated can be efficiently manufactured.

  In the case of conventional reinforcing fibers, a predetermined thickness and hardness cannot be obtained unless a number of sheets are overlapped. In addition, the conventional reinforcing fiber is said to have low bending strength. However, according to the present invention, a reinforcing fiber structure having a predetermined thickness and a high bending strength can be easily manufactured by using a fiber having a thickness greater than that of the reinforcing fiber.

The present invention is characterized in that the reinforcing fiber is provided with a plurality of bag-shaped portions formed by bag weaving and bag knitting, and the core member is placed and covered by pressure bonding, welding or firing.
According to the present invention, a plurality of bag-shaped portions formed by bag weaving / bag knitting on the reinforcing fiber are provided corresponding to the size of the core member. While the movement of the core member is prevented, it is possible to easily manufacture the reinforcing fibers that are in close contact with the outer periphery of the core member.

According to the present invention, the core member is a metal member, a fiber reinforced plastic member, a fiber reinforced ceramic member, or a fiber reinforced glass member, and the hardness of these plate-like members is lower than the hardness of the reinforced fiber. Features.
According to this invention, even if the hardness of the said core member is low, since the hardness of the said reinforced fiber is stronger, the point with the low intensity | strength of the said core member can be supplemented. Thereby, the use to the reinforced structure for construction etc. becomes possible. When a metal member is used as the core member, it can be used for a conductive structure (circuit board or the like).

According to the present invention, a bag-like part is formed by bag-woven or bag-knitting the reinforcing fiber, and a metal member, a fiber-reinforced plastic member, a fiber-reinforced ceramic member, or a fiber-reinforced member is formed in the bag-like part. A glass member is arranged, bent into a predetermined shape, and coated by pressure bonding, welding or firing.
According to the present invention, the core member can be prevented from moving during crimping, welding, or firing, and the reinforcing fibers that are in close contact with the outer periphery of the core member can be efficiently produced. That is, when baking or the like is performed with the plate-shaped core member in the bag-shaped portion, the number of processes is reduced, and the bag-shaped portion covers the core member along the core member. The accuracy is improved.

In the present invention, the core fiber of the reinforcing fiber is a PAN-based or pitch-based carbon fiber using an acrylic fiber, and a heat-sealed yarn is covered fiber, and the core member is a metal member, fiber It is a reinforced plastic member, a fiber reinforced ceramic member, or a fiber reinforced glass member, and is characterized in that the strength of the coating is increased by pressing, welding or firing with the reinforced fiber by making the surface uneven or corrugated.
According to the present invention, the strength of the coating can be increased by making these surfaces uneven and corrugated and pressing, welding or firing with the reinforcing fibers. By providing the reinforcing fibers with a plurality of bag-like portions formed by bag weaving and bag knitting, the fusion state of the uneven surfaces of each other becomes stronger.
Here, in the present invention, the core yarn of the reinforcing fiber is a PAN-based or pitch-based carbon fiber using an acrylic fiber, the heat-sealed yarn is a covered fiber, and the core member is made of metal. It is a member, a fiber reinforced plastic member, a fiber reinforced ceramic member, or a fiber reinforced glass member, and the hardness may be lower than that of the reinforced fiber.
According to this invention, even if the hardness of the said core member is low, since the hardness of the said reinforced fiber is stronger, the point with the low intensity | strength of the said core member can be supplemented. Thereby, the use to the reinforced structure for construction etc. becomes possible.
In addition, the metal member or the reinforced plastic member, which is the core member, has a melting point higher than that of the reinforced fiber, so that only the reinforcing fiber is crimped, welded, or baked, so that the shape of the metal member, the reinforced plastic member, etc. It is possible to manufacture a structure having a predetermined size and thickness (a structure of a uniform material) while maintaining the hardness and thickness without changing the thickness. In addition, by using the same reinforcing fiber as the above-mentioned reinforcing fiber to be coated and bag-woven / bag-knitted reinforcing fiber for fiber-reinforced plastic member, fiber-reinforced ceramic member, and reinforcing glass whose core member contains reinforcing fiber. It is possible to process into a more integrated fusion state. Moreover, when discarding after use, it is easy to separate the metal member and the fiber reinforced plastic member.

According to the present invention, the core member and the reinforcing fiber are integrally formed with a reinforcing fiber structure having a predetermined size and thickness so that the heat-sealing yarn melts and adheres to and fuses with the core member during pressure bonding, welding, or firing. The product can be manufactured efficiently, has a strong bending strength, and has a high durability. For example, when aluminum is used as the core member and carbon fibers are crimped around it, aluminum is highly malleable and relatively low in strength, but the carbon fibers crimped around it have both excellent specific strength and specific elasticity. It is a high-strength material, resulting in a reinforced fiber structure that supplements the strength of aluminum. For this reason, it is suitable as L-shaped steel, H-shaped steel or U-shaped steel used as a building structure, and can be applied as a hull structure (outer wall or inner wall) such as a car body or a ship or an airplane. It is. Further, when a metal member is selected as the core member, it can also be applied as a structure that conducts electricity. Moreover, when discarding after use, it is also possible to separate and reuse metal members and fiber reinforced plastic members.
Further, according to the present invention, since the reinforcing fiber is provided with a plurality of bag-shaped portions formed by bag weaving / bag knitting, movement of the core member is prevented during pressure bonding, welding, or firing. Thus, a reinforcing fiber adhered and fused to the outer periphery of the core member can be easily manufactured. Problems such as air entering between the carbon fibers and the carbon fibers, which have been caused by the conventional method of laminating and pressing a plurality of carbon fibers, are less likely to occur, the manufacturing process is simplified, and the time is shortened.
Further, according to the present invention, the reinforcing fiber is further woven into a bag with a twill or satin weave texture. Therefore, in the case of a plain weave, warp and weft are organized one by one, so the number of warps is the same as that of weft. However, the density of twill or satin weave can be higher than that of plain weave. For example, in the case of satin weave, the number of warp yarns can be increased by about 2.5 times the number of weft yarns, and the warp density can be further increased as compared with the twill weave structure.

It is a perspective view which shows the state which accommodated the metal plate in the reinforced fiber and bag-like part of 1st Embodiment to which this invention is applied. It is a side view which shows the reinforced fiber which has a reinforced fiber structure and a bag-shaped part of the said embodiment. It is a perspective view which shows the reinforced fiber which has the reinforced fiber structure and bag-like part of the said embodiment. It is a figure which shows the reinforced fiber structure of the other example of the said embodiment, (a) is sectional drawing in which the metal plate was accommodated in the bag-shaped part, (b) is sectional drawing which shows the state crimped | bonded It is. It is a figure which shows the reinforced fiber structure of the 2nd Embodiment of this invention. It is a figure which shows the reinforced fiber structure of the other example of the said embodiment, (a) is sectional drawing in which the metal plate was accommodated in the bag-shaped part, (b) is sectional drawing which shows the state crimped | bonded It is. It is a figure which shows the reinforced fiber structure of the other example of the said embodiment, (a) is sectional drawing in which the metal plate was accommodated in the bag-shaped part, (b) is sectional drawing which shows the state crimped | bonded It is. It is a figure which shows the reinforcing fiber structure of embodiment of the other example of the said 1st Example, (a) is sectional drawing which accommodated the metal plate in the bag-shaped part, (b) is crimping | compression-bonding It is sectional drawing which shows the state which carried out. It is a figure which shows the reinforced fiber structure of the 3rd Embodiment of this invention, (a) is sectional drawing which accommodated the metal plate in the bag-shaped part, (b) is a cross section which shows the state crimped | bonded FIG. It is a figure which shows the reinforced fiber structure of the 3rd Embodiment of this invention, (a) is sectional drawing which accommodated the metal plate in the bag-shaped part, (b) is a cross section which shows the state crimped | bonded FIG. It is a figure which shows the example of application of the said 3rd Embodiment. It is a figure which shows the example of application of the said 3rd Embodiment. It is a figure which shows the application example of the said 2nd Embodiment. It is a figure which shows the application example of the said 2nd Embodiment.

  Specific embodiments to which the present invention is applied will be described below in detail with reference to the drawings.

(First embodiment)
FIGS. 1A and 1B are perspective views of a reinforcing fiber having a bag-like portion 3a in which a heat-sealing yarn having a reinforcing fiber as a core yarn and covering the heat-sealing yarn is woven.
In the first embodiment, a reinforcing fiber 3 in which a heat-bonding yarn (nylon) is covered is used as the reinforcing fiber core yarn (carbon fiber), and the bag-like portion 3a is formed by bag weaving. Is formed. The size of the bag-like portion 3a is such a size that a metal member (aluminum or aluminum alloy) as the core member 2 can enter. A core member 2 bent into an L shape using two metal members 3 such as an aluminum plate is placed in a bag-like portion 3a (FIGS. 2A and 2B). The thickness Y2 of the core member 2 is thicker than the thickness Y1 of the reinforcing fiber (carbon fiber) 2 and is a reinforcing fiber member (FIGS. 3A and 3B). As will be described later, the two core members may be baked after being put in the bag-like members 3a and 3a, and may be bent into an L shape from substantially the center 3b (FIG. 4 (a) ( b)). And the center connection part 3b may be baked and others may be welded.
Although the left and right end portions 3c of the bag-like portion 3a of the present embodiment are open, only one side may be opened and the core member 2 may be inserted from the opening 3c. In the present invention, the reinforcing fiber 3 may be one in which the core member 2 is joined between the front and back surfaces, that is, as long as it is covered. In the present embodiment, the length of the metal plate 3 is longer than that of the bag-like portion 2, but if the length of the metal member 3 is shorter than that of the bag-like portion 3a, the entire metal member enters. . A plurality of bag-like portions 3a are provided, but one may be provided, and a plurality of metal members 3 may be disposed here. Alternatively, a plurality of bag-like portions 3a may be formed in the thickness direction, and the core member 2 may be put in each bag-like portion 3a to be laminated (FIG. 7B).
Here, bag weaving is one type of double weaving, and is a weaving method in which both ends of a cloth are joined to each other to form a tube (pipe shape), and when cut, it is woven into a bag shape. By making it into a bag shape, thickness and elasticity are achieved. With bag weaving, the fabric weaves in the shape of a tube (ring or cylinder). The result is a weaving process in which two pieces are joined together in the top and bottom, and a seamless fabric with high tensile strength in the circumferential direction of the ring is obtained. Bag knitting is a method in which both sides (front and back) are knitted into a bag shape, giving it a thickness and elasticity, as well as a soft feeling. Bag weaving or bag knitting may be used, but the stitches become finer, air can hardly enter the bag-like portion 3a, and the bag weaving with low stretchability is superior in thermocompression bonding, and the metal plate (aluminum or The movement of the aluminum alloy 2 is prevented. There are two types of knit: weft knitting and warp knitting. Weft knitting is a knitted fabric with continuous stitches in the horizontal direction. Warp knitting is a knitting method that creates continuous stitches in the vertical direction. There is also a close elasticity and can make a stable knitted fabric. Since the bag knitting is excellent in elasticity, the metal member (core member) 2 is stored in the bag-shaped member 3a made of one reinforcing fiber even if the shape of the core member 2 is complicated as shown in FIG. And can be coated along the metal member (core member) 2 having the shape. It is also possible to adjust the stretchability as a double structure of bag woven cover and bag knitting.

  The reinforcing fiber 3 is made of carbon fiber, carbonized fiber, polyamide fiber, and glass fiber. As the carbon fiber, a PAN-based or pitch-based reinforcing fiber or glass fiber can be used. A fiber reinforced plastic is a thermoplastic resin or thermosetting plastic composite reinforced with continuous or discontinuous reinforcing fibers. In this specification, what was processed into a predetermined shape (including bending) is referred to as a fiber reinforced plastic member, a fiber reinforced ceramic member, or a fiber reinforced glass member.

  Examples of the plastic used for the reinforced plastic member include thermosetting resins such as epoxy resins, polyester resins, vinyl ester resins, and phenol resins, and thermoplastic resins such as polyamide resins, polyolefin resins, dicyclopentadiene resins, and polyurethane resins. It is done. Further, the fiber reinforced plastic may be combined with a metal containing titanium.

  Fiber-reinforced ceramics (FRC) are reinforced ceramics in which the brittle nature of ceramics is toughened by blending ceramic fibers. High-temperature high-strength ceramics (alumina, silicon carbide, silicon nitride, carbon, etc.) are used for the matrix, and carbon fibers, silicon carbide fibers, alumina fibers, etc. are used for the fibers as the reinforcing material. In addition, there is a type in which a surface treatment layer is formed by performing a surface treatment for improving various properties on a fiber surface in a fiber preform reinforced with ceramic whisker or the like. In the case of a fiber reinforced ceramic composite material, a ceramic material may be formed inside the fabric by impregnation / firing of a ceramic polymer, a CVD method, or the like. In the case of a fiber reinforced plastic composite material, a thermosetting resin is poured and heated to be hardened. In the case of a fiber reinforced glass composite material, the glass material may be melted by heating, and the glass material may be soaked into the fabric by pressurization. In the case where the core member 2 is a metal member, plate-like aluminum or aluminum alloy is used, but a layer is formed so as not to react by kneading the metal material such as aluminum with the ceramic fiber or the carbon fiber / carbonized fiber. Can also be created.

When the first embodiment is used as an L-shaped steel or an H-shaped steel used in a building structure, it uses two metal members 2 such as aluminum plates to form an L shape or an H shape. After placement, crimping and welding (or firing) are performed (FIGS. 6A and 6B). The core member 2 can easily manufacture building structures such as L-shaped steel, H-shaped steel, and anchors by using reinforcing fibers having a thickness higher than that of the reinforcing fibers ( carbon fibers) 2 and higher hardness. If aluminum is used as the core member, or if the core member is thinned, the weight can be reduced, but the surface is covered with the carbon fiber 3, and therefore the bending strength is strong. When molding into an H-shape, the U-shapes can be combined and stored in one bag-shaped portion 3a (FIGS. 8A and 8B).
Moreover, as shown to Fig.7 (a), the metal member (core member) 2 is accommodated in the bag-shaped member 3a by one reinforcement fiber by forming the internal space part 7 also in the complicated shape of an unevenness | corrugation. Even if the shape of the core member 2 is changed, the metal member (core member) 2 having the shape can be covered. After the coating, when pressure bonding, welding, or firing is performed in that state, the heat-sealing yarn of the reinforcing fiber 3 is melted and fused and adhered to the surface of the core member 2, and the surface has high hardness. Here, the bag-like portion 3a could be confirmed in the manufactured product even after pressure bonding, welding, or firing. In the present embodiment, the left and right end portions are not aligned (a tuft) 3c, which makes it easy to confirm the position of the end portion (opening portion) 3c.
FIG. 7B shows an example in which the core member 2D is covered with the bag-like member 3 (3a) and is in a laminated state, and general carbon fibers 6 are thermocompression bonded to the front and back. A general carbon fiber (reinforced resin plate) 6 can be thermocompression bonded on one side or front and back, and can be applied as a wall material or flooring material for interior use. These thermocompression bondings are performed by a method of performing pressure bonding using a mold in addition to pressure bonding by a press machine.

(Second Embodiment)
5 (b) and 5 (c) are cross-sectional views of a bag-like portion in which the reinforcing fibers are woven in a twill or satin weave. Fig.5 (a) is a figure explaining plain weave, twill weave, and satin weave.
In the second embodiment, the reinforcing fiber 3 is a bag weave of twill or satin weave. In plain weaving, warp and weft are organized one by one, so the number of warps is the same as weft, but twill or satin weave can increase fiber density than plain weave (the texture is dense and thick, the geology is Soft and less wrinkled.) For example, in the case of satin weaving, the number of warps can be increased by about 2.5 times the number of wefts 3d. Therefore, the fiber density on the outside of the bag-shaped portion 3a woven by the bag is made larger than the fiber density on the inner side of the bag-shaped portion 3a (the crimping surface of the core member 2). The structure is durable and resistant to external force and damage, can prevent the core member 2 from moving, and is less prone to problems such as air entering the inner side of the bag-like portion 3a (the crimping surface of the core member). In addition, in order to raise the crimping | compression-bonding intensity | strength, you may give an unevenness | corrugation and a waveform to the front and back of the core member 2, or form a through-hole in the core member 2, and connect the reinforcing fiber of the front and back through a through-hole. By applying unevenness and corrugations 2z to the front and back surfaces of the core member 2 and making the bag-like portion 3a a twill or satin weave, a synergistic effect such as crimping or firing (a polymerization state of the mutual unevenness 2z and unevenness 2z is obtained. Therefore, the hardness can be further improved.

Here, the plain weave is a structure in which warp yarns and weft yarns are alternately raised and submerged one by one (FIG. 5A).
The twill weave does not float up and down alternately like a plain weave, and the texture points are continuously displayed diagonally to display a twill line. In many cases, the table is usually going to the right. When the thickness and density of the yarn 3d are the same, the twill line is often 45 ° (appears on the fabric surface as a diagonal line from the lower right to the upper left in the figure). The satin weave is made up of 5 or more warps and wefts, the crossing points are not adjacent to each other at regular intervals, the number of warp and wefts is the same, and they intersect only once with the smallest structure. . 5 harness satin is the simplest organization in satin weaving, and there are two types of crossing points, 3 jumps and 2 jumps, except for the front / back relationship. The arrangement of the crossing points is good and the satin lines are inconspicuous, so a beautiful fabric can be made (FIG. 5A). As the satin weave, in addition to the five sheets of lions, eight sheets, ten pieces, twelve pieces, twelve pieces, twenty-four pieces, and the like are not limited to these. For example, in the case of warp five satin, the warp intersects with the weft once and becomes a woven fabric in which the warp floats on four wefts. If it is warp eight satin, the warp will be a fabric that floats on seven wefts. When the yarn floats for a long time, it becomes possible to arrange the yarns closely and there is no gap between the yarns. This makes the ground thicker, softer and less wrinkled, flat and smooth and glossy.

  By using the twill weave and satin weave, the fiber density can be changed on the front and back of the reinforcing fiber 3, or the fiber density outside the bag-like portion 3a and the fiber density inside the bag-like portion can be changed. . As shown in FIG. 5B, when the fiber density outside the bag-shaped portion 3a is larger than the fiber density inside the bag-shaped portion 3a (on the crimping surface side of the core member) (Z1 <Z2), the reinforcing fibers are The structure is strong and durable against physical external force and damage from the outside. On the other hand, as shown in FIG. 5 (c), in order to make the fiber density outside the bag-like portion 3a smaller than the fiber density inside the bag-like portion (Z1 <Z2), the effect of preventing the core member 2 from moving. Becomes higher. By changing the fiber density between the front and back of the reinforcing fiber, the same effect can be produced.

(Third embodiment)
FIGS. 9 (a) and 9 (b) and FIGS. 10 (a) to 10 (d) show a bag-like portion 3a in which a heat-sealing yarn 3a having a reinforcing fiber as a core yarn and covered with a heat-sealing yarn is woven. It is a perspective view of the reinforced fiber which has.
In the third embodiment, the bag-like portions 3a are formed at a predetermined interval between the reinforcing fibers 3, and the reinforcing fibers 3 are bent at a portion (connecting portion) 3b other than the bag-like portion 3a. In the present embodiment, the two metal plates 2 are used to be put into the bag-like portions 3a, respectively, and the bending process is performed using the portion 3b between the bag-like portion 3a and the bag-like portion 3a. To do. Two or more sheets may be used, and as shown in FIGS. 12A and 12B, the five core members 2 can be housed in the bag-shaped portion 3a and bent at a predetermined angle. Unlike the case of 1st Embodiment, since the metal member 2 is not arrange | positioned at the said intermediate part 3b, a bending process is easy (FIG.10 (b)). Although the metal member 2 is not disposed in the intermediate portion 3b, if the front and back are joined by bag weaving or bag knitting, these front and back are welded by thermocompression bonding or firing. Note that reinforcing fibers may be further stacked on the intermediate portion 3b, or a thin metal member 2 may be disposed (FIG. 10D). Further, reinforcing reinforcing fibers are interposed, the binder is used only for the intermediate portion 3b to reinforce, the intermediate portion is bent by baking, and then subjected to thermocompression bonding. It may be processed.
Here, when bending to a predetermined angle, as shown in FIGS. 13 (a) and 13 (b), a rotation mechanism (shaft 2j) is arranged at the tip of the core member 2, or as shown in FIGS. 14 (a) and 14 (b). In addition, the rotation mechanism (the shaft 2j and the bearing 2i) can be rotated at a predetermined angle.
Next, for example, in the case of bending when used as an outer wall of an automobile (for example, when manufacturing a curved / bent frame), a thin portion 2Fa is provided on the core member 2F, and this thin portion 2Fa is provided. It can be bent by firing using (FIG. 11B). Although it may be bent after being bent into an L shape with the plate-shaped core member 2 in the bag-shaped portion 3a (FIG. 11 (a)), the plate-shaped core member 2 is inserted into the bag-shaped portion 3a. When firing or the like is performed in the state, the number of steps is reduced, and the bag-like portion 3 a covers the core member 2 along the core member 2. Alternatively, a predetermined thickness such as a heating press may be formed first, and only the curved portion 2Fa may be fired and processed into a predetermined curved / bent curved state. In any case, since the bag-like portion 3a changes following these bending processes, a good covering state along the bending process state can be obtained.

As the welding method, a pressure molding device, a compression molding device, a vacuum pressure molding device, or the like provided with a heating means can be used. For the pressure bonding, a press machine such as heat welding, a heat press or a heated roll press can be used. The heating condition is preferably a temperature lower than the melting point of the metal member. Further, after thermocompression bonding at a relatively low temperature, it may be partially baked and bent (for example, at a bending portion). Prior to the hot press molding, preliminary heating may be performed at a temperature at which the binder component melts, followed by main heating or partial firing (bending portion or bending for adjustment).
A binder (binder) is used for welding by pressing or the like. As the binder, polyester, polyvinyl alcohol, polyethylene vinyl alcohol, polyacetate, ethylene vinyl acetate, polyacrylic acid, polyacrylic ester, polyurethane, melamine resin, phenol resin, epoxy resin, or the like can be used. The hardness of the reinforcing fiber 3 may be made higher than the hardness of the core member 2 by applying these binders and heat-welding them.

  Here, when the core member 2 is a fiber reinforced plastic member or the like containing reinforcing fibers, it is preferable to use the same reinforcing fibers as the reinforcing fibers 3 to be coated. That is, when the reinforcing fiber included in the fiber reinforced plastic member that is the core member 2 is a carbon fiber, it is preferable to use the carbon fiber that is the same reinforcing fiber as the reinforcing fiber 3 to be coated. The same reinforcing fiber 3a may be used only by the bag-shaped portion 3a to be woven and knitted. As a specific example, the reinforcing fiber core yarn is a PAN-based or pitch-based carbon fiber using an acrylic fiber, and is a fiber-reinforced plastic member or the like including the reinforcing fiber. As a result, the heat-fusible yarn 3a is more easily melted on the surface of the core member 2, and the adhesion (fused state) is improved. The same applies to fiber reinforced ceramic members or fiber reinforced glass members.

  As mentioned above, in this embodiment, although the example mainly used as an L-shaped steel and an H-shaped steel used for a building structure was explained, the present invention is a structural member (body or inner wall) of an automobile or a vehicle, Structural members (fuselage and inner walls) of airplanes and airships, not only these outer walls, but also inner walls and flooring, automobile and vehicle parts (seat frames, etc.), airplane / airship parts (seat frames, etc.), building materials, Widely applicable to outer wall materials. Further, when a metal member is used as the core member 2, it can also be used for a conductive structure (circuit board or the like).

1 Reinforced fiber structure,
2, 2A, 2B, 2C, 2D, 2E, 2F Core member (metal member, etc.)
2z Unevenness (waveform) on the front and back surfaces of the core member,
3 Reinforcing fiber (bag-like part),
3a bag-like portion, 3c tuft (opening portion of bag-like member), 3b center (folded portion),
3d yarn of reinforcing fiber,
5 Reinforced fiber structure (after firing, after crimping)

Claims (9)

The bag-like shape having a high tensile strength in the circumferential direction of an annulus provided with a bag-like portion that is seamlessly woven by bag-weaving using a reinforcing fiber having a carbon fiber core yarn covered with a heat-sealing yarn The core member is inserted into the bag-shaped portion and covered by pressure bonding, welding or firing, and the outer peripheral surface of the core member is integrally strengthened by the cover of the bag-shaped portion. Reinforced fiber structure.   The bag-shaped portion is woven by bag weaving using a reinforcing fiber having a carbon fiber core yarn covered with a heat-sealing yarn, and the specific strength and / or specific elasticity of the core member is determined by the bag shape. Although it is weaker than the specific strength and / or specific elasticity of the core yarn of the carbon fiber of the member, the outer peripheral surface of the core member is coated by pressure bonding, welding or firing, and the specific strength and / or ratio of the carbon fiber of the bag-like portion 2. The reinforcing fiber structure according to claim 1, wherein the reinforcing fiber structure is elastically coated.   The bag-shaped portion is woven by bag weaving using a reinforcing fiber having a carbon fiber core yarn covered with a heat-sealing yarn, and the spreadability of the core member is the carbon fiber core of the bag-shaped member. 2. The fiber according to claim 1, wherein the outer peripheral surface of the core member is coated with the carbon fiber spreadability of the bag-like portion by being coated by pressure bonding, welding, or firing, although larger than the spreadability of the yarn. Reinforced fiber structure.   The bag-like portion is woven by bag weaving using a reinforcing fiber in which a carbon fiber core yarn is covered with a heat-sealing yarn, and is covered by crimping, welding, or firing so that the outer peripheral surface of the core member is covered. The reinforcing fiber structure according to claim 1, wherein the reinforcing fiber structure is covered with a thickness of the bag-like portion, and the thickness of the bag-like portion is increased according to the thickness of the core member.   5. The bag-shaped portion is formed of a twill weave or a satin weave, and the fiber density of the twill weave or the satin weave is different between the crimping surface side of the core member and the outside of the bag-shaped portion. The reinforcing fiber structure according to any one of the above. The bag-like shape having a high tensile strength in the circumferential direction of an annulus provided with a bag-like portion that is seamlessly woven by bag-weaving using a reinforcing fiber having a carbon fiber core yarn covered with a heat-sealing yarn The core member is inserted into the bag-shaped portion and covered by pressure bonding, welding or firing, and the outer peripheral surface of the core member is covered with the thickness of the bag-shaped portion, and the thickness of the bag-shaped portion is The method for producing a reinforced fiber structure is characterized in that the fiber is formed thick according to the thickness of the core member.   The bag-shaped portion is woven by bag weaving using a reinforcing fiber having a carbon fiber core yarn covered with a heat-sealing yarn, and is formed by plain weaving, twill weaving or satin weaving. 6. A method for producing a reinforcing fiber structure according to 6.   The bag-shaped portion is formed of a twill weave or a satin weave, and the fiber density of the twill weave or the satin weave is different between the crimping surface side of the core member and the outside of the bag-shaped portion. 8. A method for producing a reinforcing fiber structure according to 7.   The core member is L-shaped, U-shaped, or arc-shaped in cross section, and is L-shaped, U-shaped, or arc-shaped with the bag-shaped portion along the predetermined shape, and then crimped. The method for producing a reinforced fiber structure according to any one of claims 6 to 8, wherein coating is performed by welding or firing.