WO1999036607A1

WO1999036607A1 - Covering material for reinforcement having elasticity and reinforcing method using the same

Info

Publication number: WO1999036607A1
Application number: PCT/JP1999/000070
Authority: WO
Inventors: Kotaro Ono; Kenji Sumida
Original assignee: Washi Kosan Co., Ltd.
Priority date: 1998-01-13
Filing date: 1999-01-12
Publication date: 1999-07-22
Also published as: JPH11200201A; JP4316802B2

Abstract

As a covering material for reinforcing an article made of a metal or a resin attached on the surface to be reinforced, wherein fibers are arranged to orientate along the direction intended for reinforcement, use is made of a knitted fabric which is manufactured by means of a knitting machine having an inserting mechanism which can be used for knitting together, in the form of a straight line, a reinforcing fiber such as a carbon fiber, as a yarn to be inserted, over the whole width or length in respective directions and manufactured using an elastic yarn as a looped yarn, or a woven fabric which is manufactured using a reinforcing yarn and an elastic yarn as the warp and the weft, respectively, wherein the fabric is manufactured in a way such that fibers for reinforcement mentioned above are positioned close to the article to be covered by the extending and shrinking force of the elastic yarn. Examples of the above mentioned fiber for reinforcement include fiber filaments bundled into a form of a flat tape or a form having varying thickness or width, and a tape or cord manufactured by lining up fiber filaments on a surface of a sheet followed by fixing and then cutting them. The use of this covering material for reinforcement permits reinforcing fibers to closely contact with ease with an article having various curved surfaces. Further, by fixing them using a matrix resin or the like, such an article can be reinforced evenly.

Description

Description Reinforcement covering material with elasticity and reinforcement method using the same

TECHNICAL FIELD The present invention relates to an elastic covering material using a reinforcing fiber such as carbon fiber, and a method for reinforcing a metal product or a resin product using the same. Background art

2. Description of the Related Art In order to reinforce a product made of metal or resin, a method of bonding reinforcing fibers such as carbon fibers in a sheet shape is used in a wide field. Generally, as a means for forming the reinforcing fibers in a sheet form, the reinforcing fibers are woven and impregnated with a matrix resin, which facilitates secondary processing. You can do it. Such a woven fabric of reinforcing fibers impregnated with resin is called a prepreg. Conventional prepregs have poor elasticity, so they can be used without problems if the surface shape of the object to be bonded is a flat or cylindrical surface with no undulations. When the shape has various curved surfaces, it has been difficult to adhere to the surface. A prepreg used for such an object having various curved surfaces must have flexibility and elasticity.

As a prior art corresponding to this, Japanese Patent Application Laid-Open No. 63-183,336 discloses that a composite is formed by aligning and bonding carbon fibers to an extensible matrix resin film, and forming a curved surface. It is disclosed that the composite is put into a mold and heated and pressed. However, in this case, it is only possible to cope with the expansion, and since an expanded portion and a contracted portion are generated on various curved surfaces, there is no problem. Not all.

The present inventors have attempted to reinforce the rim portion of a vehicle wheel having various curved surfaces with fibers, and have found a fiber structure that can be in close contact with various curved surfaces, and have completed the present invention.

In the development of vehicle wheels, light alloy wheels have been remarkably developed in order to pursue strength and weight reduction and further improve design. On the other hand, the development of resin wheels with even lower specific gravity has been actively pursued, and fiber reinforcement is an essential condition for these resin wheels. A number of technologies for efficiently stacking layers have been proposed. For example, in Japanese Patent Application Laid-Open No. 55-25232, reinforcing fibers such as glass fiber and carbon fiber are used as materials, radial warp yarns are formed toward the center, and weft yarns are circumferentially formed. It describes that a woven fabric having the same is interposed in a synthetic resin in a truncated cone shape. However, this is a circular woven fabric for arranging the reinforcing fibers evenly on the rim surface, and does not closely contact the various curved surfaces of the rim. A similar technique is also described in Japanese Patent Application Laid-Open No. 56-159156, which employs a spiral woven fabric. In any case, when fiber reinforcement is performed, it is preferable that fibers that are linearly continuous from one end to the other end of the reinforcing surface are arranged.

The present invention has been made in view of the above, and has an object to be covered having various curved surfaces, in particular, an object whose sectional shape changes in a longitudinal direction such as an aircraft wing or fuselage, a seismic reinforcement material in civil engineering work, It is another object of the present invention to provide a reinforcing covering material capable of easily bringing a reinforcing fiber into close contact with protective equipment such as a bulletproof zipper, and a method for reinforcing an object using the covering material. Disclosure of the invention According to the present invention, there is provided a knitted fabric having elasticity by using reinforcing fibers as insertion yarns and elastic yarns as loop yarns, or a woven fabric having elasticity by using reinforcing fibers as weft yarns and elastic yarns as yarns. The reinforcing fiber is used as a covering material that is brought into close contact with a metal and / or resin coating target object by the elasticity of the elastic yarn.

In a knitted fabric, the reinforcing fibers are arranged in a direction parallel or perpendicular to the knitting direction. Specifically, knitting can be performed by a knitting machine with an insertion mechanism capable of linearly knitting as an insertion yarn in each direction over the entire width or the entire length of the knitted fabric.

The reinforcing fibers are knitted or woven, for example, in a state of being straightened straight. Alternatively, a convergence material in which a large number of reinforcing fiber filaments are bundled and fixed with resin while maintaining flexibility is also preferably used. The converged material here is not limited to a circular, elliptical or irregular shaped cross section, and for example, a tape formed in a flat tape shape is also suitably used. Further, a fiber filament may be used, which is at least further aligned and fixed to the sheet surface and then cut into a cord or tape.

If the converged object is in the form of a tape, for example, the thickness and width of the tape are not made uniform, but the thickness and width are changed according to the shape, performance, function, etc. of the object to be covered, in other words, according to the degree of reinforcement required By doing so, the gap between the tapes can be reduced or overlapped, and the reinforcing effect of the coating can be further improved. This will be described later.

As a textile machine for knitting such a knitted fabric, a knitting machine or a circular knitting machine capable of knitting a knitted fabric in which weft or warp insertion yarns are fixed with loop yarns are used. As the woven fabric, a woven fabric obtained from an entangled loom is preferably used. In this case, an elastic yarn is used as the entanglement yarn.

Polyurethane-based elastic yarn can be suitably used as the elastic yarn. However, an elastic yarn made of natural rubber, synthetic rubber, or the like, or a strongly twisted yarn can also be used.

The most typical type of reinforcing fiber is carbon fiber, but other types of fibers include silicon fiber single-byte fiber, alumina fiber, glass fiber, aromatic polyamide fiber (also known as aramid fiber), Boron fibers and the like. These fibers may be used alone or in combination of two or more. The above-mentioned knitted fabric may be knitted in a circular or tubular shape or in a sheet shape, and the woven fabric is woven in a sheet shape. It can be cut into various lengths and used in a tubular shape by suturing or bonding. When the object to be coated is a vehicle wheel or the like, in any case, the knitted fabric or woven fabric is formed into an annular or tubular shape and then used as a coating material. Note that a part of a sheet shape with a band or the like attached at its end to form an annular shape is also included in the annular shape.

The arrangement density of the reinforcing fibers may be constant throughout the covering material, but the covering target is to be further enhanced so that the effect of reinforcement is further enhanced by forming the covering surface as uniform as possible in the part requiring reinforcement. It is preferable that the density of the arrangement be made uneven considering the shape of the object. Such a reinforcing covering material can be obtained, for example, as follows. In other words, when weaving reinforcing fibers parallel to the knitting direction of the knitted fabric, the amount of yarn inserted into the guide may be changed, and the reinforcing fibers are used as insertion yarns in a direction perpendicular to the knitting direction. When weaving, we can change the size of the loop (stitch) or skip the stitch. In addition, the diameter of the take-up roll can be changed completely or partially to change the size of the loop. Further, the shape of the winding hole can be made similar to the curved surface of the object to be coated.

Further, as described above, as a tape made of a reinforcing fiber filament, a tape having a wide width and / or a thin thickness exists in one tape. Even with a reinforcing covering material made of such a material, it is possible to cover an object to be covered having various curved surfaces with reinforcing fibers without gaps. In other words, since the reinforcing covering material has elasticity, for example, when covering a convex spherical surface, the arrangement density of the reinforcing fibers becomes coarser near the convex apex, but the table width must be increased. As a result, the gap between the tapes can be made smaller. Conversely, tapes with a narrow width are desirable because the array density increases with distance from the top. As long as the number of filaments of the reinforcing fibers constituting the tape does not increase or decrease, the narrower the width, the thicker the portion.

When reinforcing a metal or z or resin coated object using a stretchable reinforcing covering material using the above-mentioned reinforcing fiber, at least a part of the surface of the object is reinforced. After covering with a coating material, a matrix resin or the like is applied thereto, impregnated, and fixed to the above-mentioned object to be coated. In order to allow the matrix resin to penetrate the reinforcing fibers, it is preferable to press the resin surface with a roll. Preferably, the roll has a shape conforming to the surface shape of the object to be coated and has soft physical properties. Alternatively, after the matrix resin is impregnated into the reinforcing coating agent, the object to be coated may be coated with the matrix resin. In any case, the resin is then cured by pressure molding or autocure curing.

Examples of the matrix resin include an epoxy resin, an unsaturated polyester resin, a vinyl ester resin, a phenol resin, a polyimide resin, and a polyamide resin. However, care must be taken when the elastic yarn is urethane, because the solvent of polyimide resin may have an adverse effect. Furthermore, if the density of the reinforcing fibers is significantly insufficient due to the shape of the curved surface, at least two or more layers of elastic covering material using fibers are provided, and these are adhered and fixed to the object to be coated. Making up for the shortage is also effective. In addition, especially for places that require reinforcement, It is also within the scope of the present invention to use conventional reinforcing materials in an overlapping manner.

When two or more layers of the reinforcing covering material are laminated, the direction of the reinforcing fibers can be eliminated by laminating the reinforcing fibers in each layer so that the directions of the reinforcing fibers cross each other.

The reinforcing covering material of the present invention can be suitably used for a rim of a vehicle wheel. Wheel rims have a variety of curved shapes, and in order to obtain lighter wheels made of light alloys, the rim thickness is reduced, and the above-mentioned reinforcing coating material and matrices are used. It can be reinforced by using resin.

Other applications include reinforcement of at least a part of skeleton members and outer members of aircraft, motorcycles, cars, vehicles, ships, buildings, structures, etc. It is also used in bulletproof vests and sports protective equipment. In particular, it is extremely effective in reinforcing the curved surface of an object whose cross section changes in the longitudinal direction, such as an aircraft wing or fuselage. BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a cross-sectional view of a light alloy wheel.

FIG. 2A is a schematic view showing an example of a knitted fabric according to an embodiment of the present invention, and FIG. 2B is a partially enlarged view thereof. FIG. 2 (c) is a schematic view showing an example of the structure of a cylindrical knitted fabric according to another embodiment of the present invention. FIG. 3 is an explanatory diagram showing a situation in which the knitted fabric of the present invention is wound around a jewel portion.

FIG. 4 is an explanatory diagram of an apparatus for adjusting the degree of stretching of a knitted fabric.

FIG. 5 (a) is an explanatory view of a method of mounting a tubular knitted fabric, and FIG. 5 (b) is an explanatory view showing a state immediately after the knitted fabric is mounted.

FIG. 6 (a) is a perspective view showing an example of a peg portion provided with ribs, and FIG. 6 (b) is an explanatory view showing a situation in which fiber reinforcement is performed. Fig. 7 (a) is a perspective view showing an example in which fiber coating is performed on an object to be covered having an elliptical surface, and Fig. 7 (b) shows a case where fiber reinforcement is performed only on a part of the object to be coated. FIG.

FIG. 8 (a) is a schematic diagram showing an example of the woven fabric of the present invention, and FIG. 8 (b) is an explanatory diagram showing a situation in which fiber reinforcement is performed. BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be described more specifically by taking, as an example, a case where a covering material for reinforcing a knitted fabric is applied to a wheel.

Fig. 1 is a cross-sectional view of the integrated light alloy wheel (1) including the rotation axis.

The wheel (1) is of high offset type and is connected to the disc (2) outer rim (3) to form a wide inner rim (4), which is effective for dropping the tire when mounting the tire (5). Is provided. These rims constitute a kind of rib structure as a whole, and the radius is not constant, but is substantially cylindrical. The outer and inner rims are composed of a bead sheet (6) in contact with the bead portion of the tire, a hump (7) for preventing falling off, and a rim flange (8). According to the present invention, the carbon fiber reinforcing portions (9a), (9b), and (9c) are brought into close contact with the metal portion on the substantially cylindrical surface of the rim to form a substantially cylindrical portion. S indicates the offset dimension.

A carbon fiber reinforced portion is formed on the wheel as described above by using the knitted fabric (10) which is an embodiment of the reinforcing covering material of the present invention.

In FIG. 1, the circumference of the carbon fiber reinforced portion (9b) forming the well portion (5) is different at points A, B and C. In the 17 mm diameter forged light alloy wheel used in this example, the difference between the circumferences at points A and C is 115 mm, which is equivalent to 8.6%. Carbon fiber is flat on such a conical surface around the axis of rotation. A general prepreg cannot be used to arrange in a row direction. Therefore, the reinforcing covering material according to the present invention is used.

FIG. 2 (a) is a schematic diagram showing a knitted fabric (100) which is an example of the reinforcing covering material of the present invention, in which a carbon fiber aggregate yarn having a filament number of 100 is inserted into an insertion yarn.

(1 1), 40 denier elastic yarn as elastic yarn is loop yarn

The stitches formed by using (12) are shown. Although the knitting width is not particularly limited, the knitting width may be a ribbon shape that matches the width required for fiber reinforcement, or may be a sheet shape knitted to a wider width and cut to a predetermined width.揷

(1 1) is knitted in a linearly continuous state over the entire knitting width. It is preferred that it adheres to make it sticky and prevents slippage. After that, the folded part (13) of the insertion thread is cut and used. FIG. 2 (b) is an enlarged view of a portion surrounded by a broken line in FIG. 2 (a). Instead of cutting the folded portion (13), the yarn may be cut in advance with the yarn length determined, and the yarn may be knitted with both ends clipped.

Fig. 2 (c) shows an example of the structure of the cylindrical knitted fabric. When knitting such a knitted fabric (16), a double rassel machine of a knitting machine is generally used. Although various knitting structures are conceivable, basically, as shown in this figure, loop yarns (17) are alternately knitted on adjacent knitting needles and inserted into the underlap (18). The yarn (19) moves up and down and is taken into the knitted fabric. In the present invention, an elastic yarn such as a rubbery yarn or a strongly twisted yarn is used for the loop yarn (17), and a reinforcing fiber such as carbon fiber is used for the imported yarn (19). In the case of having such a knitting structure, the knitted fabric itself has elasticity. Therefore, if the surface of the object to be coated has a simple shape in which the curved surface changes uniformly, it is heated and looped after coating in a cylindrical shape. It is also possible to adopt a method that shrinks the yarn and makes it tighter. The cylindrical knitted fabric described above becomes a long cylinder in the direction of the insertion thread (19), but on the knitting machine, the two knitted fabrics are wound in a plane state. In the case of such a tubular knitted fabric, there is an advantage that the number of reinforcing yarns covering the cylindrical surface is exactly as designed.

Next, a method of coating the object to be coated with these knitted fabrics will be specifically described.

The work of winding the knitted fabric (10) around the wheel well (4) can be performed as follows.

First, the required number and width of carbon fibers parallel to the rotation axis are determined on the surface of the peg portion (4), and the required number of carbon fibers are cut from the knitted fabric (10) to obtain a knitted fabric (10a). FIG. 3 is a perspective view of only the well portion (4) of the wheel, and shows a state where the knitted fabric (10a) is wound. Points corresponding to points A, B, and C in FIG. 1 are shown in the perspective view of FIG. Attach the tip of the knitted fabric (10a) so that it matches the points A, B, and C on the face of the jewel part parallel to the rotation axis. Given the circumferential length of the jewel at point A, extend point D of the knitted fabric (10a) to length L, and make the rear end of the knitted fabric parallel to the rotation axis. Hold. The reason why the knitted fabric (10a) can be extended is that the elastic yarn is used for the 絰 yarn.

Next, rotate the well (4) to move the end E side of the knitted fabric along the peripheral surface of the point A while matching the movement amount of the point A. At this time, the movement amount of point D is equal to the movement amount of point A. The movement of the points B and C is naturally large because the radius is different from that of the point A, and the rear end of the knitted fabric (10a) is kept parallel to the rotation axis. One end F side of the knitted fabric will be stretched. The point D coincides with the leading end of the knitted fabric when the dwell portion (4) rotates, and the knitted fabric (10a) is evenly wound on the top surface of the dwell portion. However, the stretch rate at one end F side of the knitted fabric is Is the same as the E side, but gradually increases, so that the weft (11) is not arranged parallel to the rotation axis.

On the other hand, Fig. 4 shows an example of a method of arranging the weft (11) parallel to the rotation axis. In this method, the knitted fabric (10a) is stretched by a mold roll (14) when it is wound around the peg portion (4). The mold roll (14) has a small radius but the same shape as the outer periphery of the peg portion, and moves up and down with respect to the small rolls (15) arranged before and after to form a knitted fabric (10). a) Adjust the degree of stretching. The amount of stretching differs in each part of the knitted fabric depending on the shape of the mold roll, and the density of the weft wound around points A, B, and C is proportional to the perimeter of each, and is even and uniform. State. In this case, it is more convenient for the knitted fabric (10a) to be long. If the tip of the knitted fabric is attached to a position inclined with respect to the rotation axis, the weft is arranged in a direction inclined with respect to the rotation axis, that is, in a biased manner. In either case, the leading and trailing ends of the knitted fabric must be kept parallel.

Still another method will be described with reference to FIG. In Fig. 5 (a), the pell part

A knitted fabric (10a) is wound around a cylinder (20) having a constant radius having an inner diameter through which (4) can pass, and the leading end and the trailing end are adhered to form a knitted fabric into a tubular shape. After covering the cylinder (20) with the knitted fabric on the well (4), the knitted fabric (10a) is slid and the cylinder (20) escapes while being fixed on the well (4). Let it. The situation is shown in Fig. 5 (a) and (b). The weft yarn (11) can be fixed so as to be in close contact with the peg portions having different radii by the contracting force of the elastic yarn (12) constituting the knitted fabric. Also in this case, if the cylinder is rotated when the knitted fabric is slid from the cylinder, the weft can be arranged in a direction inclined with respect to the rotation axis. Fiber reinforcement in Fig. 1

For (9a) and (9b), the knitted fabric can be fixed in the same way, but the description is omitted. After fixing the knitted fabric, apply epoxy resin, press with a roll, cure with auto creep, and fix the weft on the well. In the above example, the fiber was further continuously wound around the knitted fabric in the circumferential direction, and then the epoxy resin was applied.

As the knitted fabric (10a) in FIG. 5 (a), a tubular one may be used. In the case of a tubular knitted fabric, it is cut to an appropriate length, but carbon fibers can be continuously arranged so as to wrap around the surface whose shape changes. .

By the way, since the circumferences of points A, B, and C in Fig. 5 (b) are different, the spacing of the wefts (11) is naturally different, and there is a problem that the effect of fiber reinforcement is different. . In order to solve this problem, it may be excessive, but it is sufficient to further laminate the knitted fabric on the peripheral surface including points B and C.

In such a case, the use of a tape made of carbon fiber can substantially solve the above problem without overlapping the knitted fabric. In other words, a knitted fabric is knitted using a tape formed by converging a carbon fiber filament into a flat shape as an insertion yarn. When the stitches are stretched and large, the flat state is maintained. When the stitches are small, the stitches are rounded or folded, and the width is small, so that the rim surface can be evenly covered with carbon fibers. As a matter of course, the flat portion of the fiber is thin, and as the width becomes narrower, it becomes apparently thicker. However, if the number of filaments of the reinforcing fiber is gradually increased or decreased to converge into a tape shape, a tape having a substantially uniform thickness and a different width can be obtained. If such a tape is used as the insertion thread, the length of the knitted fabric will naturally differ partially, so the shape of the take-up roll will correspond to this, and the longer part will be wound faster than the shorter part. Have a structure like this.

Next, an example will be described in which the rim portion of the wheel is reinforced by a rib structure and further reinforced by carbon fiber. About this rib structure Has already been proposed by the applicant of the present invention in Japanese Patent Application No. Hei 9-31992, so that the details will be omitted and an example will be described with reference to the drawings.

Fig. 6 (a) shows a flat diamond-shaped concave part (21) provided in a part of the wheel part (4), and as a result, a rib (2) whose high part is inclined with respect to the rotation axis. 2) and (2 3). In other words, a rib is constructed in the direction of the vias to reinforce the well part and reduce the thickness of the metal part, resulting in a lighter wheel. However, in the case of a forged light alloy wheel, reducing the thickness of the metal part to less than 2 mm leaves concerns about strength. Therefore, the thickness of the metal part can be further reduced by reinforcing with carbon fiber. That is, as shown in FIG. 6 (b), the above-mentioned knitted fabric (10a) is attached so that the weft (11) is parallel to the rotation axis, and the continuous carbon fiber (24) is attached. ) Is wound in the circumferential direction of the peg portion, and then epoxy resin is applied and impregnated. After pressing with a roll, the resin is cured by autoclaving. Thus, the well part is reinforced in two directions by ribs and in two directions by carbon fiber reinforcement.

As described above, the case where the present invention is applied to a wheel has been described as an example.However, a reinforcing covering material having elasticity using reinforcing fibers used in this case is extremely effective in general when fiber reinforcement is performed on various curved surfaces. is there. For example, aircraft fuselage and wings, motorcycle fuel tanks, vehicle bodies and bumpers, vehicle shells, ship side walls, especially light boat hulls, columns and beams in buildings and structures, seismic reinforcement, There are also many places where fiber reinforcement is required, such as protective equipment such as bulletproof vests. As an example of a common curved surface, an object to be covered (30) having an elliptical cross section and a different width will be described.

Fig. 7 (a) shows a state in which a tubular knitted fabric (1Ob) using carbon fiber is attached to the insertion thread (11) on the object to be covered (30). Tubular knitted fabric (1 Ob) is obtained by sewing the knitted fabric (10) into a tubular shape. Due to the stretching force of the loop yarn (12), the weft (11) comes into close contact with the curved surface of the elliptical cross section. That is, since the knitted fabric is tubular, the curved surface of the cross-sectional ellipse of the object to be covered (30) is entirely covered with weft.

If only a part of the curved surface is to be fiber-reinforced, it can be made as shown in Fig. 7 (b). That is, first, both ends of a knitted fabric (10) cut to an appropriate length are clamped by clips (31). Bands (3

2) is attached in an annular shape, and the knitted fabric (10) can be stretched by adjusting the length of the band. The band does not require any particular elasticity, but depending on the shape of the object to be covered, it may be easier to fix it with elasticity.

After that, the knitted fabric (10) is coated and impregnated with matrix resin,

-Press with a pressure piece with a similar surface shape. In the case where a concave portion exists locally on the curved surface of the elliptical cross section, it is necessary to resort to pressure molding. However, the knitted fabric (10) can evenly contact such a concave portion. I can do it.

In the above, the case where the reinforcing covering material is a knitted fabric has been described. Next, the case where the covering material is a woven fabric will be described.

FIG. 8 (a) is a schematic diagram showing leno woven fabric (also referred to as woven fabric) (41), which is an example of the woven fabric of the present invention, and FIG. 8 (b) is surrounded by a broken line. The part is shown enlarged. As shown in these figures, the two warp yarns (42), which are elastic yarns, are entangled with each other while the weft yarn (4

3) If the reinforcing fibers are rigid, such as carbon fibers, the elastic yarn is woven to grip the weft. The weft turning points (44) are cut off so that they do not hinder the elongation of the fabric. However, when weft yarn is cut to the required length and woven as in a levia weaving machine, No points occur. The direction of weft entanglement is shown in Fig. 8 (b).

If the entanglement in the opposite direction as in 2a) is added, the warp in the width direction does not easily occur when the woven fabric is stretched.

The woven fabric obtained as described above can be applied to reinforcement of a vehicle wheel or the like in the same manner as the above-described knitted fabric.

Industrial applicability

The reinforcing covering material having elasticity according to the present invention has a cross-sectional shape in an object to be covered having various curved surfaces, in particular, in a direction to be covered with a reinforcing fiber and to be reinforced (the longitudinal direction of the fiber at the time of covering). Since the reinforcing fibers can be very easily brought into close contact with the changing object to be coated, the work time for fiber reinforcement can be greatly reduced. In addition, the reinforcing covering material can be knitted or woven into a cylindrical shape, so that the reinforcing fibers can be efficiently placed on the cylindrical structural material. It can also fix fibers for use.

Therefore, the reinforcing covering material of the present invention and the method of reinforcing with the reinforcing covering material include, in addition to vehicle wheels, fuselage and wings of aircraft, fuel tanks for motorcycles, vehicle bodies and bumpers of automobiles, outer members of vehicles, It can be applied to a wide range of fields, including civil engineering-related matters, such as the side walls of ships, especially the hulls of lightweight ports, and the columns and beams of buildings and structures. In the field of clothing, it can also be used as protective vests, protective gear for sports equipment, and the like.

Claims

The scope of the claims

1. A reinforcing covering material that reinforces metal and / or resin products by arranging reinforcing fibers along the direction in which reinforcement is required on the surface where reinforcement is required. Knitting with a knitting machine with an insertion mechanism capable of linearly knitting reinforcing fibers such as carbon fibers in the direction of the entire width or the entire length of the knitted fabric as the insertion yarn, and looping the elastic yarn. Even if the knitted fabric is knitted as a yarn and covers an object to be covered whose cross-sectional shape changes in the direction in which the covering is to be performed, the elasticity of the elastic yarn causes the reinforcement. A stretchable reinforcing covering material, characterized in that the fibers are brought into close contact with the surface of the object to be covered.

2-Reinforcement covering material that reinforces metal and / or resin products by arranging reinforcing fibers along the direction in which reinforcement is required on the surface where reinforcement is required. This is a woven fabric in which reinforcing fibers such as carbon fibers are used as weft yarns and elastic yarns are used as warp yarns to cover the object to be coated whose cross-sectional shape changes in the direction to be coated. In addition, the elastic covering material is characterized in that the reinforcing fibers are brought into close contact with the surface of the object to be coated by the elastic force of the elastic yarn.

3. At least a part of the reinforcing fibers is a bundle of reinforcing fiber filaments, which is formed in a shape that can cover the object to be coated with the reinforcing fibers as uniformly as possible. The elastic covering material according to claim 1 or 2, wherein the elastic covering material has elasticity.

4. The stretchable reinforcing sheath according to claim 3, wherein the converged material of the reinforcing fiber filament is formed in a flat tape shape.

5-The convergence of the reinforcing fiber filaments is suitable for reinforcement. In order to be able to perform this, the width and width and / or the thickness of the thickening sheet based on the shape and function of the object to be reinforced are provided, and the surface of the object to be coated is covered with the reinforcing fibers almost without gaps. The stretchable reinforcing covering material according to claim 3, characterized in that:

6. The reinforcing covering material according to any one of claims 1 to 5, wherein the reinforcing covering material is formed in an annular or cylindrical shape.

7-A reinforcing method for reinforcing a metal and / or resin product by coating the product with a reinforcing covering material, wherein the reinforcing material has elasticity according to any one of claims 1 to 6. After at least a part of the surface of the object to be coated is covered with the covering material, at least a part of the reinforcing covering material is impregnated with the matrix resin, so that the object to be coated is covered with the resin. A reinforcing method characterized by tightly fixing a reinforcing covering material.

8. A reinforcing method for covering a product made of metal and / or resin with a covering material for reinforcement to reinforce these products, wherein the reinforcement having elasticity according to any one of claims 1 to 6. The coating material for impregnation is impregnated with a matrix resin, and the reinforcing coating material covers at least a part of the surface of the object to be coated, so that the reinforcing material is coated on the object to be coated. Reinforcement method characterized by tightly fixing.

9. The reinforcing method according to claim 7, wherein at least two layers of the elastic covering material are provided on the surface of the object to be coated.

10. The reinforcing method according to claim 9, wherein the two or more layers of the reinforcing covering material are arranged so that the directions of the reinforcing fibers contained in the reinforcing covering material cross each other.

11. The object to be coated is at least a part of a rim portion of a light alloy wheel. Any of 1 to 10 Law.

1 2. A claim characterized in that the object to be coated is at least a part of an aircraft, a motorcycle, a car, a vehicle, a ship, a building, a structure, a protective garment, a tool, and the like. The reinforcement method according to any one of Items 1 to 10.