JP3198333U - Structure with composite material reinforced with metal mesh - Google Patents

Abstract

The present invention provides a structure in which the strength and impact resistance of a composite material are enhanced by a metal mesh. A structure in which a composite material is reinforced with a metal mesh includes a first composite material layer body 11, a second composite material layer body 12, a metal mesh 20, an upper composite layer fiber body 3, and a lower composite layer fiber body 300. Including. The metal mesh 20, the upper composite layer fiber body 3, and the lower composite layer fiber body 300 are located between the first composite material layer body 11 and the second composite material layer body 12. The metal mesh 20 is bonded between the upper composite layer fiber body 3 and the lower composite layer fiber body 300, and the first composite material layer body 11 is bonded to the outside of the upper composite layer fiber body 3, The second composite material layer body 12 is bonded to the outside of the lower composite layer fiber body 300. [Selection] Figure 1

Description

  The present invention relates to a structure in which a composite material is reinforced with a metal mesh, and in particular, a metal fine mesh is added to the fiber composite material column to form an integrated structure, and the strength and bursting toughness of the metal mesh material are used to make the composite material strength In addition, the impact resistance is strengthened, and the brittle burst of the composite material is prevented from causing the destruction of the disaster.

  Current fiber composites, such as carbon fiber or glass fiber composites, usually have the drawback of brittle fracture, and when they are subjected to external forces and breakage occurs, they break up instantaneously and cause disaster damage For example, the carbon fiber composite fork that is currently popular in bicycles is used by Steerer and Crown when the front wheels are impacted. A tear occurs in the (Crown) area, the front wheel momentarily disengages, the rider falls, and there is a fatal danger.

  Therefore, it is necessary to improve the impact strength of the structure of the current fiber composite material and prevent its brittle fracture.

JP 2009-241306 A

  The purpose of the present invention is to integrally form a fiber composite material by adding a metal mesh, utilizing the strength and bursting toughness of the metal mesh material, preventing brittle fracture of the composite material, and improving the strength and impact resistance of the composite material. An object of the present invention is to provide a structure in which a composite material is reinforced with a metal mesh (meta1 mesh) to be reinforced, and a method for manufacturing the structure.

  In order to achieve the above object, the present invention has a structure in which a composite material is reinforced with a metal mesh, a first composite material layer body, a second composite material layer body, at least one metal mesh, an upper composite layer fiber body, Side composite layer fibrous bodies can be included.

  Among these, the metal mesh, the upper composite layer fiber body, and the lower composite layer fiber body are located between the first composite material layer body and the second composite material layer body, and each fiber body includes a plurality of or Including a single fiber body, the fiber body can be an array of different fiber angles or different woven fiber types, the upper composite layer fiber body and the lower composite layer fiber body being symmetrically arranged sequence).

  The upper composite layer fiber body includes a first fiber body, a second fiber body, and a third fiber body, and the lower composite layer fiber body includes a fourth fiber body, a fifth fiber body, and a sixth fiber body. .

  Preferably, the second fiber body and the third fiber body exhibit an angle-ply structure, the fifth fiber body and the sixth fiber body exhibit a cross structure, and the first fiber body, The positions of the second fiber body and the third fiber body can exhibit a symmetrical arrangement relative to the fourth fiber body, the fifth fiber body, and the sixth fiber body.

  The structure of the present invention includes a first composite material layer body, a second composite material layer body, at least one metal mesh, a first fiber body, a second fiber body, a third fiber body, and a fourth fiber in addition to the above-described configuration. The body, the fifth fiber body, the sixth fiber body, the seventh fiber body, the eighth fiber body, the ninth fiber body, and the tenth fiber body can also be included.

  Among these, the metal mesh, the first fiber body, the second fiber body, the third fiber body, the fourth fiber body, the fifth fiber body, the sixth fiber body, the seventh fiber body, the first fiber body, The eight fiber body, the ninth fiber body, and the tenth fiber body are located between the first composite material layer body and the second composite material layer body.

  Preferably, the fiber array angles of the second fiber body and the third fiber body exhibit a cross structure, the fiber array angles of the fifth fiber body and the sixth fiber body exhibit a cross structure, and the seventh fiber body The fiber arrangement angle of the fiber body and the eighth fiber body exhibits a cross structure, and the fiber arrangement angle of the ninth fiber body and the tenth fiber body exhibits a cross structure, and the first fiber body and the second fiber body Fiber body, the third fiber body, the fourth fiber body, the fifth fiber body, the sixth fiber body, the seventh fiber body, the eighth fiber body, the ninth fiber body, and the tenth fiber body Exhibits a symmetric arrangement.

  Metal mesh with high strength and high impact energy absorption is added to the fiber composite material (for example, bicycle fork, frame, seat post) and molded into the composite material. Applying this mesh, create an intra-penetrating network structure that is easy to stick, use the strength and toughness of the metal mesh material, prevent the brittle fracture of the composite material, Strengthens impact resistance, has the advantage of early warning action, avoids accidental destruction of parts, and ensures the safety of the rider's life.

It is sectional drawing of this invention. It is another structure sectional drawing of this invention. It is another structure sectional drawing of this invention. It is a figure which shows the impact test of the Example of this invention. It is a figure which shows the state of the steerer after receiving the impact of the Example of this invention. It is a figure which shows the state of the steerer after receiving the impact of the Example of this invention. It is a figure which shows the state of the steerer after receiving the impact of the Example of this invention. It is a figure which shows the state of the steerer after receiving the press of this invention. It is a figure which shows the state of the steerer after receiving the press of this invention. It is a figure which shows the state of the steerer after receiving the press of this invention.

  As shown in FIG. 1, the structure in which the composite material is reinforced with the metal mesh of the present invention includes a first composite material layer body 11, a second composite material layer body 12, a metal mesh 20, an upper composite layer fiber body 3, and a lower side. A composite layer fiber body 300 is included.

  The metal mesh 20, the upper composite layer fiber body 3, and the lower composite layer fiber body 300 are located between the first composite material layer body 11 and the second composite material layer body 12.

  In the embodiment diagram, the metal mesh 20 is bonded between the upper composite layer fiber body 3 and the lower composite layer fiber body 300, and the first composite material layer body 11 is connected to the upper composite layer fiber body 3. Bonded to the outside, the second composite material layer body 12 is bonded to the outside of the lower composite layer fiber body 300.

  The material of the first composite material layer body 11, the second composite material layer body 12, the upper composite layer fiber body 3, and the lower composite layer fiber body 300 of the present invention is a glass fabric, a carbon fabric. (Carbon Fabric), Unidirectional Prepreg, or Surface Matt, which can be applied alternately to different layers of the present invention to create a composite design structure. For example, bicycle frame, fork design strength (Strength), weight distribution (Weight Distribution), rigidity (Rigidity) and the like can be met.

  The upper composite layer fiber body 3 according to an embodiment of the present invention includes a first fiber body 31, a second fiber body 32, and a third fiber body 33, and the lower composite layer fiber body 300 includes a fourth fiber body 34. , Fifth fiber body 35 and sixth fiber body 36 are included.

  Preferably, the positions of the respective fiber layers are arranged symmetrically in the structural pillar of the present invention, or different fiber layers are different from each other, or can be combined with each other at the same fiber angle, for example, The position of the upper composite layer fiber body 3 and the lower composite layer fiber body 300 is the object, or the position of the first fiber body 31 in a further embodiment is relative to the fourth fiber body 34. Presents a symmetric arrangement. Whether the second fiber body 32 and the third fiber body 33 have a cross structure, or the position of the second fiber body 32 exhibits a symmetrical arrangement relative to the fifth fiber body 35, or the fifth fiber body 35 and the sixth fiber body 36 have a cross structure, or the positions of the third fiber bodies 33 have a symmetrical arrangement relative to the sixth fiber body 36.

  In an embodiment of the present invention, referring to FIG. 1, the present invention is a first composite material layer body 11, a second composite material layer body 12, a metal mesh 20, an upper composite layer fiber body 3, a lower composite layer fiber body. 300, the upper composite layer fiber body 3 includes a first fiber body 31, a second fiber body 32, and a third fiber body 33, and the lower composite layer fiber body 300 includes a fourth fiber body 34, 5 fiber body 35 and 6th fiber body 36 are included.

  The one side of the metal mesh 20 bonds the first fiber body 31, the second fiber body 32, and the third fiber body 33 in order from the inside to the outside, and further bonds the first composite material layer body 11. . The other side of the metal mesh 20 bonds the fourth fiber body 34, the fifth fiber body 35, and the sixth fiber body 36 in order from the inside to the outside, and further bonds the second composite material layer body 12. To do. The fiber arrangement angles of the second fiber body 32 and the third fiber body 33 exhibit a cross structure. The arrangement angle of the fifth fiber body 35 and the sixth fiber body 36 exhibits a cross structure. The positions of the first fiber body 31, the second fiber body 32, and the third fiber body 33 are the same as the fiber arrangement angles of the fourth fiber body 34, the fifth fiber body 35, and the sixth fiber body 36. Relatively symmetrical arrangement.

  In the present invention, the metal mesh 20 having high strength and high impact energy absorption is applied to the first fiber body 31, the second fiber body 32, the third fiber body 33, the fourth fiber body 34, and the fifth fiber body. 35, the sixth fiber body 36, the first composite material layer body 11, and the second composite material layer body 12 are added to the fiber composite material column so that each member building of the present invention is integrated with resin. Therefore, the mesh of the metal mesh 20 can be applied to create an inter-penetrating network structure that is easy to stick, and the strength and rupture toughness of the metal mesh material can be used to make a composite Prevents brittle tearing of materials, strengthens parts strength and impact resistance, has the advantage of early warning action, avoids accidental destruction of parts, and ensures the safety of the rider's life.

  As shown in FIG. 2, another embodiment of the present invention includes a first composite material layer body 11, a second composite material layer body 12, at least one metal mesh 20, an upper composite layer fiber body 3, and a lower composite layer. The upper composite layer fiber body 3 includes a first fiber body 31, a second fiber body 32, a third fiber body 33, a seventh fiber body 37, and an eighth fiber body 38. The composite layer fiber body 300 includes a fourth fiber body 34, a fifth fiber body 35, a sixth fiber body 36, a ninth fiber body 39, and a tenth fiber body 30.

  The metal mesh 20, the first fiber body 31, the second fiber body 32, the third fiber body 33, the fourth fiber body 34, the fifth fiber body 35, the sixth fiber body 36, the seventh The fiber body 37, the eighth fiber body 38, the ninth fiber body 39, and the tenth fiber body 30 are located between the first composite material layer body 11 and the second composite material layer body 12, The fiber array angles of the second fiber body 32 and the third fiber body 33 exhibit a cross structure, and the fiber array angles of the fifth fiber body 35 and the sixth fiber body 36 exhibit a cross structure, The fiber array angle of the fiber body 37 and the eighth fiber body 38 exhibits a cross structure, and the fiber array angle of the ninth fiber body 39 and the tenth fiber body 30 exhibits a cross structure, and the first fiber body 31, the second fiber body 32, the third fiber body 33, the seventh fiber body 37, and the eighth fiber body 38 are positioned at the fourth fiber body 34 and the fifth fiber body 34.維体 35 exhibits sixth fibers 36, said 9 fibrous body 39, relative to the said 10 fibrous body 30 symmetrically arranged.

  In the present embodiment, the effect is similar to that of the above embodiment, and the eighth fiber body 37, the eighth fiber body 38, the ninth fiber body 39, and the tenth fiber body 30 constituting several sets of intersecting structures. Has been added.

  As shown in FIGS. 1 and 2, the second fiber body 32 and the third fiber body 33 of the present invention preferably have a cross structure of + 30 ° and −30 °, and the fifth fiber body 35, The sixth fiber body 36 has a cross structure of + 30 ° and −30 °.

  Preferably, the second fiber body 32 and the third fiber body 33 of the present invention have an intersecting structure of + 45 ° and −45 °, and the fifth fiber body 35 and the sixth fiber body 36. The fiber arrangement angle is a cross structure of + 45 ° and −45 °.

  The metal mesh 20 of the present invention is between the first fiber body 31 and the fourth fiber body 34.

  As shown in FIG. 2, in the preferred embodiment, the second fiber body 32 and the third fiber body 33 have a cross structure of + 30 ° and −30 °, and the fifth fiber body 35. The sixth fiber body 36 has a cross structure of + 30 ° and −30 °, and the fiber array angles of the seventh fiber body 37 and the eighth fiber body 38 have a cross structure of + 45 ° and −45 °. In addition, the fiber array angles of the ninth fiber body 39 and the tenth fiber body 30 have a cross structure of + 45 ° and −45 °.

  As shown in FIG. 3, in the embodiment of the present invention, the metal mesh 20 is plural, and in the embodiment diagram, the metal mesh 20 is two, and the structure and effects in this embodiment are as follows. The one metal mesh 20 is located between the third fiber body 33 and the seventh fiber body 37, and the other metal mesh 20 is the sixth fiber. It is located between the body 36 and the ninth fiber body 39, and a plurality of layers of metal mesh are added to the fiber composite material and integrally molded, thereby further strengthening the strength and impact resistance of the part.

As shown in FIGS. 1, 2, and 3, based on the actual test of the present invention, the mesh diameter of the metal mesh 20 needs to be compatible with the fiber body diameter, and only after that, the metal mesh 20 and the interfacial adhesive strength of the fiber body can be improved , and the mesh of the metal mesh 20 of the present invention is preferably between 80 and 500 mesh size.

  The surface of the metal mesh 20 of the present invention includes a cross-linking agent (Primer), whereby the adhesion strength of the metal mesh 20 and the resin is enhanced only by a process of adding a special cross-linking agent to the surface of the metal mesh 20. The characteristics of the metal mesh 20 can be sufficiently exhibited.

  Preferably, the material of the metal mesh 20 of the present invention is selected from materials that can be spun.

  Preferably, the material of the metal mesh 20 of the present invention is selected from any one of stainless steel, alloy steel, aluminum alloy, titanium alloy, and copper alloy.

  Preferably, the composite material of the present invention is, for example, a bicycle fork, a frame, a seat post, a handle bar, a rim, a crankshaft. Any one of the parts is selected.

  Preferably, the material of the first composite material layer body 11 and the second composite material layer body 12 of the present invention is any one of composite materials such as glass fabric, carbon fabric, unidirectional prepreg, and surface mat. One is selected.

  A specific experiment of the present invention will be described below with reference to the drawings, and the effect of adding a composite material to the metal mesh 20 will be demonstrated with reference to the embodiment of FIG.

Example 1:
A composite bicycle fork is tested, and an impact test is performed on a steerer laminated steel plate with and without the metal mesh 20 added.

Sample type:
Table 1 below shows the details of Sample A.

  Table 2 below shows details of Sample B.

Impact test method: ASTM D256 Izod impact method
Sample size: 12.7 mm width * 63.5 mm length.
Impact test results: As can be seen from the test results in Table 3 below, when one more layer of the metal mesh 20 is added, it is clear that the impact performance of the composite material is improved by about 25%, i.e. The anti-shock property of the steerer can be improved and the safety of the rider can be effectively guaranteed.

Example 2:
The result of adding the metal mesh 20 actually prevents catastrophic tearing in the bicycle steerer:
The stacking order of CFRP (Carbon Fiber Reinforced Plastics) fork is the same as the stacking of the sample A in Example 1. The stacking order of the steerer to which the metal mesh 20 is added is the same as the stacking of the sample B in Example 1.
The CFRP fork process is performed by a general blow molding method at a pressure of 12 kg / cm ² and a temperature of 145 ° C.
The impact test of the fork is carried out in accordance with the European standard EN14781 Section 4.9.5 Rearward impact test code. The weight of the impact weight is 22.5kg, the impact weight drop height is 640mm, and the fork adopts the rigid-mounted impact. The actual state of the impact test is as shown in FIG.

  Referring to FIG. 5 (a), the steerer after the impact of the CFRP fork to which the metal mesh 20 is not added has fractured at about 6 to 8 cm from the crown. If the front wheel encounters an impact when the rider rides and this type of fork breaks, there is a fatal danger that must be avoided.

  Referring to FIG. 5 (b), it adds the metal mesh 20 to the middle of the tube thickness of 5 to 15 cm from the crown of the steerer, and adds all the stainless steel mesh (150 mesh size, total weight 3.5 g), After receiving the impact, only a hole that the surface material avoided was formed at a position of 8 cm, and the situation of tearing into two did not occur. By adding only 3.5 g of the metal mesh 20, it is possible to prevent accidental tearing and prove that the present invention can certainly achieve the purpose of protecting the safety of the rider.

  Referring to FIG. 5 (c), the thickness of the steerer is 1/3 and 2/3, and one layer of stainless mesh (mesh size 150 mesh, total weight about 7g) is added. It is clear that only a small mark is generated at a position 8 cm from the crown, there is no conspicuous crack, and the safety of the rider can be further improved.

  The examples in this section only added 3.5 g and 7 g stainless steel mesh, leading to a large safety difference by increasing 1% and 2% for a total fork weight of 360 g, The excellent part of the present invention can be proved.

Example 3:
Tensile property tests were conducted on composite materials without the metal mesh 20, with the addition of the metal mesh 20 (without special treatment on the surface of the metal mesh), and with the metal mesh 20 with special treatment on the surface. The results obtained are as shown in Table 4 below.

  As can be seen from the numerical value of Sample C, the metal mesh 20 to be added needs to be treated with a special surface cross-linking agent (primer), and the metal mesh can be fully exhibited only after that.

Example 4:
The position where the metal mesh 20 is added can also be selected by design. In the present embodiment, the metal mesh 20 is added to the vicinity of the outer side and the inner side of the CFRP steerer, and the influence of the steerer on the pressing load is illustrated.

  Referring to FIG. 6 (a), it is a steerer without the metal mesh 20, and FIG. 6 (b) is obtained by adding the metal mesh 20 to the outside of the steerer. ) Shows a pressure test situation in which the metal mesh 20 is added to the inside of the steerer and the pressure is applied. Table 5 below shows numerical values of the obtained pressing load and bearing rigidity.

  As can be seen from the pressure test, by adding the metal mesh 20, it is possible to effectively improve the pressure resistance capacity of the bicycle steerer of the composite material, and further by making the position where the metal mesh 20 rests further inside. It has the ability of pressure resistance, and the pressure resistance rigidity has increased more than 1 time.

In summary, the present invention has at least the following characteristics:
1. The integral structure in which the metal mesh 20 is added to the composite material improves its strength and impact resistance, has the characteristics of an early warning action, and prevents catastrophic failure caused by brittle fracture of the composite material.
2. The mesh structure of the metal mesh 20 can improve the interfacial adhesive strength between the metal mesh 20 and the composite material.
3. Utilizing the ease of flexible deformation of the metal mesh 20, it is easy to combine deformed shapes of members.

  The detailed description of the present invention according to the above embodiments does not limit the scope of the present invention. Even if a person familiar with the present technology makes changes or adjustments within the scope of the present invention, the important significance of the present invention is not lost and is included in the scope of the present invention.

11 first composite material layer body 12 second composite material layer body 20 metal mesh 31 first fiber body 32 second fiber body 33 third fiber body 34 fourth fiber body 35 fifth fiber body 36 sixth fiber body 37 seventh Fibrous body 38 Eighth fibrous body 39 Ninth fibrous body 30 Tenth fibrous body 3 Upper composite layer fibrous body 300 Lower composite layer fibrous body

Claims (16)

Including a first composite material layer body, a second composite material layer body, a metal mesh, an upper composite layer fiber body, a lower composite layer fiber body,
The metal mesh, the upper composite layer fiber body, and the lower composite layer fiber body have a structure in which a composite material is reinforced by a metal mesh positioned between the first composite material layer body and the second composite material layer body . The metal mesh is bonded between the upper composite layer fiber body and the lower composite layer fiber body,
The first composite layer fiber body is bonded to the outside of the upper composite layer fiber body;
The structure of reinforcing a composite material with a metal mesh according to claim 1, wherein the second composite material layer body is bonded to the outside of the lower composite layer fiber body. The upper composite layer fiber body includes a first fiber body, a second fiber body, and a third fiber body,
The structure of reinforcing a composite material with a metal mesh according to claim 1, wherein the lower composite layer fiber body includes a fourth fiber body, a fifth fiber body, and a sixth fiber body.   The structure in which the composite material is reinforced by the metal mesh according to claim 3, wherein a fiber arrangement angle of the second fiber body and the third fiber body exhibits a cross structure.   The structure in which the composite material is reinforced by the metal mesh according to claim 3, wherein a fiber arrangement angle of the fifth fiber body and the sixth fiber body has a cross structure. One side of the metal mesh binds the first fiber body, the second fiber body, and the third fiber body in order from the inside to the outside, and further bonds the first composite material layer body,
The other side of the metal mesh binds the fourth fiber body, the fifth fiber body, and the sixth fiber body in order from the inside to the outside, and further joins the second composite material layer body. A structure in which the composite material is reinforced with the metal mesh described. The upper composite layer fiber body includes a first fiber body, a second fiber body, and a third fiber body,
The lower composite layer fiber body includes a fourth fiber body, a fifth fiber body, and a sixth fiber body,
Among them, one side of the metal mesh binds the first fiber body, the second fiber body, and the third fiber body in order from the inside to the outside, and further bonds the first composite material layer body,
The other side of the metal mesh binds the fourth fiber body, the fifth fiber body, and the sixth fiber body in order from the inside to the outside, and further bonds the second composite material layer body,
The second fiber body and the third fiber body have a cross structure, the fifth fiber body and the sixth fiber body have a cross structure,
The positions of the first fiber body, the second fiber body, and the third fiber body are symmetrically arranged relative to the fourth fiber body, the fifth fiber body, and the sixth fiber body. A structure in which the composite material is reinforced with the metal mesh described. The upper composite layer fibrous body includes a first fibrous body, a second fibrous body, a third fibrous body, a seventh fibrous body, and an eighth fibrous body,
The lower multilayer fiber body includes a fourth fiber body, a fifth fiber body, a sixth fiber body, a ninth fiber body, and a tenth fiber body,
Among these, the metal mesh, the first fiber body, the second fiber body, the third fiber body, the fourth fiber body, the fifth fiber body, the sixth fiber body, the seventh fiber body, the first fiber body, 8 fibrous bodies, the ninth fibrous body, and the tenth fibrous body are located between the first composite material layer body and the second composite material layer body,
Whether the fiber array angles of the second fiber body and the third fiber body have a cross structure, the fiber array angles of the fifth fiber body and the sixth fiber body have a cross structure, the seventh fiber body, and The fiber array angle of the eighth fiber body exhibits a cross structure, or the fiber array angles of the ninth fiber body and the tenth fiber body exhibit a cross structure,
The positions of the first fiber body, the second fiber body, the third fiber body, the seventh fiber body, and the eighth fiber body are the fourth fiber body, the fifth fiber body, and the sixth fiber body. The structure which strengthened the composite material with the metal mesh of Claim 1 which exhibits a symmetrical arrangement relative to this 9th fiber body and this 10th fiber body. Including a first composite material layer body, a second composite material layer body, at least two metal meshes,
The upper multilayer fiber body includes a first fiber body, a second fiber body, a third fiber body, a seventh fiber body, and an eighth fiber body,
The lower multilayer fiber body includes a fourth fiber body, a fifth fiber body, a sixth fiber body, a ninth fiber body, and a tenth fiber body,
The metal mesh, the first fiber body, the second fiber body, the third fiber body, the fourth fiber body, the fifth fiber body, the sixth fiber body, the seventh fiber body, and the eighth fiber. A body, the ninth fiber body, and the tenth fiber body are located between the first composite material layer body and the second composite material layer body,
The fiber array angles of the second fiber body and the third fiber body have a cross structure, the fiber array angles of the fifth fiber body and the sixth fiber body have a cross structure, the seventh fiber body and the The fiber array angle of the eight fiber bodies exhibits a cross structure, or the fiber array angles of the ninth fiber body and the tenth fiber body exhibit a cross structure,
The positions of the first fiber body, the second fiber body, the third fiber body, the seventh fiber body, and the eighth fiber body are the fourth fiber body, the fifth fiber body, and the sixth fiber body. The structure which strengthened the composite material with the metal mesh which exhibits symmetrical arrangement with respect to the fiber arrangement angle of this 9th fiber body and this 10th fiber body. The second fiber body and the third fiber body have a cross structure of + 30 ° and −30 °,
10. The structure in which the fifth fiber body and the sixth fiber body have a crossing structure of + 30 ° and −30 ° and the composite material is reinforced with the metal mesh according to claim 3. The second fiber body and the third fiber body have a crossing structure of + 45 ° and −45 °,
The structure in which the composite material is reinforced by the metal mesh according to any one of claims 3 to 9, wherein the fifth fiber body and the sixth fiber body have a cross structure of + 45 ° and -45 °. The second fiber body and the third fiber body have a cross structure of + 30 ° and −30 °,
The fifth fiber body and the sixth fiber body have a cross structure of + 30 ° and −30 °,
The seventh fiber body and the eighth fiber body have a cross structure of + 45 ° and −45 °,
The structure in which the composite material is reinforced by the metal mesh according to any one of claims 3 to 9, wherein the ninth fiber body and the tenth fiber body have a cross structure of + 45 ° and -45 °. One of the metal mesh structures is bonded between the third fiber body and the seventh fiber body;
The structure of reinforcing a composite material with a metal mesh according to claim 9, wherein the other metal mesh is bonded between the sixth fiber body and the ninth fiber body.   The structure obtained by reinforcing a composite material with a metal mesh according to claim 1 or 9, wherein the mesh of the metal mesh is between 80 and 500 MeshSize.   The structure which the surface of the said metal mesh strengthened the composite material with the metal mesh of Claim 1 or Claim 9 containing a crosslinking agent (primer).   The material of the first composite material layer body, the second composite material layer body, and the fiber body includes at least one of a glass fiber fabric, a carbon fabric, a unidirectional prepreg, and a surface mat. A structure in which the composite material is reinforced with the metal mesh according to claim 9.