JP2000043171A - Frp structure and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily manufacture a lightweight, high strength and high rigidity FRP structure at a low cost by providing a resin diffusion means for a core with FRP reinforcing members arranged discontinuously any integrating reinforcing fiber bases and the core for an FRP plate with a resin. SOLUTION: Reinforcing bases 23 for forming FRP reinforcing members having parts extending perpendicularly with an FRP plate after molding are discontinuously arranged on one of the end parts of cores 22. Inside a mold 21, the cores 22 consisting of foams or the like are arranged and the reinforcing fiber bases 23 are arranged on at least both faces of the cores 22, each of which has a larger groove as a resin passage and many small grooves branching from the large groove. The resin is diffused in the planar direction of the reinforcing fiber bases 23 through the large groove and the small grooves and the reinforcing fiber bases 23 are impregnated with the resin thus diffused in the thickness direction of the base 23. Finally the impregnated resin is cured at normal temperature or by heating to obtain the completed FRP structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an FRP structure and a method for manufacturing the same, and more particularly, to an optimum design technique for a core material and its peripheral portion of a lightweight and high-strength FRP structure using a plurality of core materials. The present invention relates to a method for efficiently manufacturing the FRP structure at low cost.

[0002]

2. Description of the Related Art As a lightweight and high-strength material, FRP (fiber reinforced plastic) has attracted attention in various industrial fields.
Attention has been paid to its excellent mechanical properties and the like.

When this FRP is formed into a relatively large member, a combined structure of an FRP skin material and a lightweight core material, particularly a sandwich structure in which FRP skin plates are arranged on both surfaces of the core material is adopted. There is. With such a configuration, an FRP structure that is large, lightweight, and has the necessary strength and rigidity can be obtained. It is also known that it is effective to arrange a reinforcing member such as a rib or a cap member at an appropriate position for further reinforcement.

[0004]

However, a relatively large FRP structure is often formed by a hand lay-up method or the like, and is not easy to manufacture.
There was a problem that the cost was relatively high.

Now, the present inventors can easily and inexpensively produce a relatively large FRP structure, and furthermore, the FRP structure to be formed has optimal characteristics according to the part, and furthermore, the molding can be carried out. A molding technique that can be optimally performed according to the part has been established.

An object of the present invention is to provide a lightweight, high-strength, high-rigidity FRP structure which can be easily and inexpensively manufactured with respect to the prior art, and a method of manufacturing the same. An object of the present invention is to provide an optimal structure of a core material and its peripheral portion when molding using the core material.

[0007]

In order to solve the above-mentioned problems, an FRP structure according to the present invention comprises a plurality of core members, an FRP plate disposed on at least one surface of the core members, and at least a part of a core member. A reinforcing member made of FRP disposed at at least one end of each core member in the material and having a portion extending substantially perpendicular to the FRP plate, wherein the reinforcing member has an FRP structure. When viewed as a whole, the body is arranged discontinuously, and a resin diffusion means is provided for the core material, and at least the reinforcing fiber base material and the core material of the FRP plate are integrated with a resin. It is characterized by having been done.

[0008] Further, the FRP structure according to the present invention comprises a plurality of core members and an FRP disposed on at least one surface of the core members.
An FRP structure comprising: an RP plate; and an FRP reinforcing member disposed at at least one end of each core material in at least a part of the core material and having a portion extending substantially perpendicular to the FRP plate. The arrangement density of the reinforcing member in the FRP structure is different depending on the portion of the FRP structure, and a resin diffusion means is provided for the core material, and at least the reinforcing fiber base material of the FRP plate is provided. And the core material are integrated by a resin.

Further, the FRP structure according to the present invention comprises a plurality of core members and an FRP disposed on at least one surface of the core members.
An FRP structure having an RP plate, wherein at least a part of the core materials is arranged in a staggered manner, and a resin diffusion means is provided for the core material, and at least a reinforcing fiber of the FRP plate is provided. It is characterized in that the base material and the core material are integrated by a resin. This FRP
In the structure, an FRP reinforcing member having a portion extending substantially perpendicular to the FRP plate may be provided at at least one end of each core material in at least a part of the core material.

In the above-described FRP structure, the resin diffusion means may be provided in the core material and formed from a groove, or may be formed as a resin diffusion means separate from the core material. .

Further, the FRP structure according to the present invention is an FRP structure having a plurality of core members formed with a groove which becomes a passage of a resin at the time of molding, and an FRP plate disposed on at least one surface of the core member. The shape of the groove formed in the core material is different depending on the portion of the FRP structure, and at least the reinforcing fiber base material and the core material of the FRP plate are integrated by a resin. What you do. Also in this FRP structure, at least one end of each core material in at least a part of the core material,
An FRP reinforcing member having a portion extending substantially perpendicular to the FRP plate may be provided.

In the above, the structure of the groove formed in the core material differs depending on the portion of the FRP structure.
For example, a structure in which the direction of the groove is different depending on the part of the FRP structure, a structure in which the pitch of the groove is different depending on the part of the FRP structure, a structure in which the depth of the groove is different depending on the part of the FRP structure, A structure in which the width differs depending on the portion of the FRP structure, or a combination of these structures can be employed.

When the grooves are provided on the surface of the core material, for example, it is preferable that the grooves have at least two types of grooves having different cross-sectional areas, and more preferably 0.5 to 0.5.
It is composed of at least two kinds of grooves of 10 cm ² and grooves having a smaller cross-sectional area connected to the grooves.

In such an FRP structure, FR
The volume fiber content of the P board is 35% or more and 65% or less,
The void fraction is preferably 5% or less, more preferably the volume fiber content is 40% or more and 55% or less, and the void fraction is 3% or less. Such a high volume fiber content and a low void content can be easily achieved by, for example, one-shot molding using a grooved core material.

That is, the above-mentioned FRP structure is characterized in that at least the FRP plate is formed by one-shot molding in which the reinforcing fiber base material is impregnated with resin substantially simultaneously and cured substantially simultaneously. Features.

In the above-mentioned FRP structure, a structure in which the FRP plate is disposed only on one side of the core material may be employed. However, it is preferable that the FRP plate has a sandwich structure in which the FRP plate is disposed on both surfaces of the core material. It is desirable that the member has a structure extending between the two FRP plates. Due to such a sandwich structure, FR
The strength, rigidity and surface durability of the FRP plate can be ensured by the FRP plates arranged on both sides while ensuring the lightness of the entire P structure.
Rigidity can be secured.

Further, a method of manufacturing an FRP structure according to the present invention is a method of manufacturing an FRP structure as described above, wherein a plurality of core members are provided in a mold and at least one side of the core members includes a core. A reinforcing fiber base material extending in the surface direction of the material, and a medium for spreading the resin in the surface direction above or below these materials, or a resin for spreading the resin in the core material in the surface direction. Form a diffusion path,
After covering the whole with the bag base material, vacuuming the inside covered with the bag base material, injecting a resin to diffuse at least to the surface of the reinforcing fiber base material, and impregnating the reinforcing fiber base material with the resin. In one shot.

In this method, at least one end of each core material in at least a part of the core material in the mold is provided.
A reinforcing member forming substrate having a portion extending substantially perpendicular to the reinforcing fiber substrate can be arranged.

In such a method, the injected resin is continuously diffused on the surface of the reinforcing fiber base, and the resin is sequentially impregnated in the thickness direction of the reinforcing fiber base. Of course, there may be a portion where the diffusion of the resin in the surface direction along the surface of the reinforcing fiber base and the impregnation in the thickness direction of the reinforcing fiber base are performed substantially simultaneously.

By this one-shot molding, a relatively large FRP structure with a built-in reinforcing member can be easily, efficiently, and inexpensively manufactured while ensuring the characteristics of light weight, high strength, and high rigidity.

In the molded FRP structure, the arrangement and density of the core material and the reinforcing members are changed or specially arranged according to the portion of the FRP structure. It is possible to have optimal mechanical characteristics according to the part.

Further, during molding, for example, the direction, pitch, depth, width, etc. of the grooves formed in the core material are set according to the parts, so that the flow of the resin is made uniform, Resin can be flowed more aggressively in difficult areas,
The one-shot molding is performed more efficiently, and the uniformity or the degree of strengthening is changed according to the part, and the desired characteristics of F
Molded into RP structure.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. F according to the present invention
The RP structure includes a plurality of core members and an FRP plate disposed on at least one surface of the core members. If necessary, at least one end of each core member in at least a part of the core members. And a reinforcing member made of FRP having a portion extending substantially perpendicular to the FRP plate (that is, having a cross section of L-shape, U-shape, T-shape, I-shape, etc.). This FRP plate and reinforcing member
It is a composite material containing a reinforcing fiber and a matrix resin.
As reinforcing fibers of these FRP materials, carbon fiber woven fabrics,
It is preferable to use mats, strands, glass fiber fabrics, mats, and rovings alone or in combination. Particularly, in order to maximize the effect of weight reduction, it is preferable to use carbon fiber. And the carbon fiber also has a number of filaments of one carbon fiber yarn of less than ordinary 10,000, but is in a range of 10,000 to 300,000, more preferably 50,000 to 150,000. It is better to use tow-like carbon fiber filament yarn in the range of resin impregnation, handleability as a reinforcing fiber substrate,
Further, it is preferable because the economical efficiency of the reinforcing fiber base is more excellent. Further, it is more preferable to arrange a carbon fiber woven fabric on the surface of the FRP structure because the surface design is enhanced. In addition, a reinforcing fiber base is formed by laminating a plurality of layers of reinforcing fibers as necessary or in accordance with required mechanical properties or the like, and the reinforcing fiber base is impregnated with a resin. On the reinforcing fiber layer to be laminated, a fiber layer or a fabric layer aligned in one direction can be appropriately laminated, and the fiber orientation direction can be appropriately selected according to the direction of required strength.

As the FRP resin, a thermosetting resin such as epoxy, unsaturated polyester, phenol, and vinyl ester is preferable in terms of moldability and cost. However,
A thermoplastic resin such as nylon or ABS resin, or a mixed resin of a thermosetting resin and a thermoplastic resin can also be used.

A composite material in which the FRP resin is replaced with an inorganic material, that is, a fiber-reinforced inorganic material is preferable particularly for application to a refractory material. Therefore, the structure of the fiber-reinforced inorganic material using the plate-like material of the fiber-reinforced inorganic material is preferable from this viewpoint. Examples of preferred inorganic materials include cement, mortar, concrete, alkali silicate, gypsum and the like. Particularly, cement and mortar are more preferable.

As the core material, a foam, wood, or the like can be used, and a foam is preferable in terms of weight reduction. As the material of the foam, polyurethane, polystyrene, polyethylene, polypropylene, PVC, silicon, or the like is used, and its specific gravity is preferably selected from 0.02 to 0.2.
If the specific gravity is less than 0.02, sufficient strength may not be obtained. On the other hand, when the specific gravity exceeds 0.2, the strength is increased, but the weight is increased, which is contrary to the purpose of reducing the weight. Also, a honeycomb material can be used as the core material. Examples of the material of the honeycomb material include an aluminum honeycomb and an aramid honeycomb, and the material and dimensions thereof can be selected according to the required strength and the like.

FIG. 1 shows a typical structural example of an FRP structure according to the present invention. The FRP structure 1 includes a plurality of core materials 2
And at least one surface of the core material 2 (both surfaces in the present embodiment)
And FRP reinforcing members 4a and 4b each having a U-shaped cross section and disposed at at least one end (both ends in the present embodiment) of each core material 2. . Reinforcing member 4a arranged at the center of FRP structure 1
Functions as a reinforcing rib, and the reinforcing member 4b disposed at the end functions as a cap member. The cross-sectional shape of the reinforcing members 4a and 4b may be L-shaped, T-shaped, I-shaped, or the like, in addition to the U-shape. FRP board 3a or 3
Any shape having a portion extending substantially perpendicular to b may be used. In the illustrated reinforcing member, the FRP plates 3a, 3b
And a portion extending substantially in parallel to
A portion that extends substantially parallel to the RP plate, that is, a flange portion having a U-shaped cross section in the example of FIG. 1 is fitted into a cutout recess 2 a formed on at least one surface of an end of the core material 2. . It is preferable that the depth of the cutout recess 2a is substantially equal to the thickness of the reinforcing member portion fitted therein, so that the flatness of the FRP plate disposed thereon is ensured.

The cutout recess of the core material 2 is, for example, as shown in FIG.
It is formed as shown in FIG. In FIG. 2, (a)
Is a core material 11 made of, for example, a foam, and is formed, for example, in a rectangular shape. At least one end of the material 11 is cut out in a concave portion as shown in FIGS. In the example shown in FIG. 2B, the core member 13 is provided with cutout recesses 12a and 12b on both sides so that a reinforcing member having a U-shaped cross section as shown in FIG. In the example shown in (c), the core member 15 has the cutout recess 14 provided on only one side.

The arrangement of the core material and the reinforcing member according to the present invention,
Before describing the form, one-shot molding will be described. The above-described FRP structure can be formed by a one-shot molding method using a vacuum bag method. This one-shot molding is performed by, for example, FIG.
Is performed as shown in FIG. FIG. 3 illustrates molding of an FRP structure having a sandwich structure.

In the method shown in FIG.
A plurality of core members 22 made of a foam or the like are arranged, and a reinforcing fiber base material 23 is arranged on at least both surfaces thereof. In the present embodiment, the plurality of core members 22 are arranged vertically and horizontally as viewed in plan. The ends of the rows of the arranged core materials 22 may be arranged so that the reinforcing fiber base material 23 wraps the core material 22 or, as shown in FIG. 3, a U-shaped cap-shaped reinforcing fiber base. Material 28 may be arranged.

Each core member 22 is configured, for example, as shown in FIG. 4 (variable examples of the core member will be described later). The core material 22 is provided with a large groove 24 serving as a path for the resin.
And a large number of small grooves 25 branched from the large groove 24. The resin is diffused through the large grooves 24 and the small grooves 25 in the surface direction of the reinforcing fiber base 23, and the diffused resin is impregnated into the base 23 in the thickness direction of the reinforcing fiber base 23. In this embodiment, the core member 22 itself is provided with a diffusion path for diffusing the resin in the direction of the substrate surface by the groove portion. However, separately from this structure or together with this structure, a separate member is formed. Alternatively, a sheet-like medium that diffuses the resin in the surface direction of the reinforcing fiber base may be provided. This medium can be arranged on the upper surface side of the reinforcing fiber base material 23 or on both upper and lower surfaces. Although the structure of the medium is not particularly limited, the medium can be composed of a sheet-like member having a groove structure similar to that shown in FIG. 4, a sheet-like member having vertical and horizontal grooves, or a net-like member.

In the embodiment shown in FIG. 4, cutout recesses 26 are formed on both sides (or four sides) of the core material 22, and the cutout recesses 26 have a U-shaped cross section as shown in FIG. The reinforcing fiber base material 27 for forming the rib-shaped reinforcing member is disposed. At the center of the panel, the U-shaped reinforcing fiber bases 27 forming the ribs abut against each other, and at the end of the arranged core material 22, a U-shaped cap reinforcing fiber base 28 is disposed. These are covered with a reinforcing fiber base material 23 disposed on both sides together with the core material 22. However, when the end portions of the arranged core members 22 are to be covered with the reinforcing fiber base material 23, the U-shaped cap-shaped reinforcing fiber base material 28 at the end portions is used.
Need not necessarily be provided.

The upper surface side of the mold of the reinforcing fiber base 23 is covered with a bag base 29, and the inside is evacuated by suction by a vacuum pump 30. Next, the valve 31 is opened and the mold 21 in which the liquid resin 32 is
Injected into. The injection is performed through an edge breather 33 made of a porous material or the like, and the suction to the pump 30 is also performed through a similar edge breather 34. The resin injection position, the vacuum suction position, and the installation positions of the edge breathers 33 and 34 can be appropriately changed. For example, the resin may be injected from the center of the FRP structure. Further, in the present embodiment, the upper surface of the reinforcing fiber base 23 is directly covered with the bag base 29. However, if necessary, a release material (not shown) which is peeled off after molding is interposed. You may. In the above embodiment, the bag base material 29 has the function of a release material. The release material provided as necessary is preferably a release material (for example, a nylon taffeta woven sheet or the like) that can pass through the resin but can be peeled off after being cured and removed from the FRP structure. Furthermore, a rigid plate such as an iron plate may be arranged between the bag base material 29 and the upper surface of the mold of the reinforcing fiber base material 23.

The injected resin is, as described above, the core material 2
While being rapidly diffused in the surface direction of the reinforcing fiber base material 23 along the second large groove 24 and the small groove 25, it is gradually impregnated in the thickness direction of the reinforcing fiber base material 23. At the same time, the resin is also impregnated into the U-shaped reinforcing fiber base materials 27 and 28 forming the ribs and the cap, and the ribs and the cap are integrally formed.
The impregnated resin is cured at room temperature and possibly by heating to complete the FRP structure. After curing, the bag base material 29 is removed, and the cured FRP structure is removed from the mold 21.
Taken out of Thus, the FRP structure is formed by one shot.

In the above-mentioned molding, the grooves provided in the core material serve as paths for the resin during molding. The relationship between the groove and the cutout recess provided in the core material described above can take various forms.

For example, as shown in FIG. 5 (a), if a plurality of grooves 42 are arranged in the core material 41 and the grooves 42 are formed so as to communicate with the cutout recesses 43 provided at the ends, At the time of molding, the resin can be smoothly guided to the notch concave portion 43, and the resin can be easily diffused into the reinforcing member forming base material arranged at this portion. Also, as shown in FIG.
The core material 51 in which the groove 52 extends to the bottom surface of the notch recess 53
In this case, the resin can be more favorably diffused, and the extended portion is formed into only the resin or a resin-rich portion, so that the extended portion also serves as a void escape area.
It can also contribute to a reduction in the void ratio of the RP molded part.

The core material 4 shown in FIGS.
The structures in which the FRP reinforcing members 61 and 62 or the reinforcing fiber base material for forming the reinforcing members are disposed on the components 1 and 51 are as shown in FIGS. 6A and 6B, respectively.

Further, as shown in FIG. 5C, a groove 72 extending in a direction parallel to the extending direction of the cutout concave portion 73 can be formed in the core material 71.
A groove 74 parallel to the groove 72 may be formed on the surface of one other portion. The groove 72 mainly contributes to the diffusion of the resin to the reinforcing member portion, and the groove 74 contributes to the resin diffusion to the reinforcing fiber base material for forming the FRP plate.

The overall shape of each core material may take various forms. For example, as shown in FIG. 7, cutout recesses 82 are provided on four sides (or three sides) of a core material 81, and a groove including a large groove 83 and a small groove 84 can be carved on one or both sides.

As shown in FIG. 8, a groove 92 extending in the circumferential direction is formed on the side surface of the core material 91, and at the same time, a large groove 93 and a small groove 94 can be formed on one or both surfaces. The small groove 94 may extend all around. In the case of such a core material 91, as shown in FIG. 9, when the reinforcing member-forming reinforcing fiber base material 95 is disposed at the end thereof, a hole communicating with the groove 92 is formed in the reinforcing fiber base material 95. The resin can be made to pass through the holes 96 into the grooves 92 during molding.

The FRP structure can be formed by using a plurality of core materials in various forms as described above. In the present invention, for example, as shown in FIG.
During molding, a plurality of core materials 101 are arranged, for example, in a plane, and at least a part of the core materials 101 is substantially provided at least at one end of the core material 101 with respect to the FRP plate after molding. The reinforcing fiber base 102 for forming the reinforcing member having a vertically extending portion, for example, the reinforcing fiber base 102 having a U-shaped cross section as described above is discontinuously arranged. In this discontinuous arrangement, as shown in the drawing, the reinforcing fiber substrates may be partially connected to each other, and it is sufficient if the entire arrangement is discontinuous.

As shown in FIG. 11, a plurality of sizes of core materials 111 are arranged, and the arrangement density of the reinforcing fiber base material 112 for forming ribs provided at the end of the core materials 111 is determined. Can vary depending on the site of the FRP structure.

As described above, by arranging the reinforcing fiber base material for forming ribs discontinuously or changing the arrangement density in accordance with the portion of the FRP structure to be molded, the FRP structure after molding can be It is possible to have optimal mechanical characteristics depending on the part. For example, it is possible to locally improve the compressive strength and the shear strength for a specific part.

As described above, a plurality of kinds of core materials having various grooves which become passages of the resin can be used.
For example, as shown in FIG. 12, a core material 121 having a groove 122 formed so that the resin can flow and spread easily is used in a portion where the resin is relatively hard to flow at the time of molding, such as a corner portion. The core material 1 is provided with a groove 123 at a portion where the resin flow is good so that the resin can be more quickly diffused.
24 can be used. With such an arrangement of the core material, it is possible to achieve both the rapid diffusion of the resin and the property of uniformly distributing the resin to all corners, thereby facilitating the molding and improving the properties of the FRP structure to be molded. Can be measured.

The grooves formed in each core material are shown in FIG.
As shown in (1), the pitch p, the depth h, and the width w can be appropriately set according to the molding conditions (temperature, pressure, etc.), the viscosity of the resin used, and the like. For example, (a) 200 ≧ w × h ≧ 5 (mm ² ), (b) 300 ≧
p ≧ 10 (mm) More preferably, (a) 100 ≧ w × h ≧ 10 (mm ² ), (b) 100
≧ p ≧ 20 (mm) is set. If w × h is too small, the molding speed becomes slow. Conversely, if it is too large, the amount of resin increases and the weight of the molded body increases. If p is too narrow, the amount of resin increases and the weight of the molded body increases. Conversely, if it is too wide, the molding speed is slow, impregnation is poor, and stable molding becomes difficult. And
Regarding the pitch of the groove of this core material, the FRP to be molded
It can be changed according to the site of the structure. In this way, by appropriately changing the pitch, width, depth, etc. of the groove, it becomes possible to make the resin flow more easily in the part where resin does not easily flow during molding, and to improve uniform and good resin diffusion. In addition, the characteristics of the molded FRP structure can be made uniform or the characteristics can be locally changed intentionally.

Further, as shown in FIG. 14, it is possible to arrange the core material entirely or partially in a specific manner. In the example shown in FIG.
Although the directions of the grooves 132 of the core material 31 are aligned, each core material 1
31 are arranged in a staggered manner. With such a staggered arrangement, the ribs (or rib forming members) located between the core members 131 also have a staggered lattice shape, so that the mechanical characteristics in multiple directions are improved.

Further, in the structure shown in FIG. 15, the direction of the grooves 142 of the core members 141 arranged in a staggered manner is changed according to the portion of the FRP structure to be formed. Also in the structure shown in FIG. 12 described above, the direction of the groove of the core material is changed according to the portion, although not in a staggered arrangement.
As described above, by changing the direction of the groove 142 of the core material 141 in accordance with the portion, the characteristics of the FRP structure to be formed can be made uniform, and conversely, the mechanical characteristics of a specific portion can be improved. To

These core materials and the arrangement of the cores can be changed by combining the above embodiments.

[0049]

As described above, according to the FRP structure and the method of manufacturing the same according to the present invention, particularly, the arrangement of a plurality of core materials, the optimization of the groove shape, and the optimization of the arrangement and the arrangement density of the reinforcing members. Accordingly, a relatively large, lightweight, high-strength, high-rigidity FRP structure having optimal characteristics can be easily and inexpensively manufactured by one-shot molding.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an FRP structure according to one embodiment of the present invention.

FIG. 2 is a partial perspective view showing an example of forming a cutout concave portion of a core material according to the present invention.

FIG. 3 is a schematic configuration diagram illustrating an example of a molding method according to the present invention.

FIG. 4 is an enlarged perspective view of a core material used in the method of FIG.

FIG. 5 is a partial perspective view showing an example of forming a groove in a core material.

6 is an end sectional view of a core material corresponding to FIGS. 5A and 5B. FIG.

FIG. 7 is a perspective view showing another example of the structure of the core material.

FIG. 8 is a perspective view showing still another example of the structure of the core material.

9 is a partial longitudinal sectional view when a reinforcing member-forming reinforcing fiber base material is attached to the core material of FIG. 8;

FIG. 10 is a plan view showing an arrangement example of a core material and a reinforcing fiber base material for forming a reinforcing member.

FIG. 11 is a plan view showing another arrangement example of a core material and a reinforcing fiber base material for forming a reinforcing member.

FIG. 12 is a plan view illustrating an arrangement example of a grooved core material and a reinforcing fiber base material for forming a reinforcing member.

FIG. 13 is a sectional view of a groove of a core material.

FIG. 14 is a plan view showing another arrangement example of a grooved core material and a reinforcing fiber base material for forming a reinforcing member.

FIG. 15 is a plan view showing still another arrangement example of the grooved core material and the reinforcing fiber base material for forming the reinforcing member.

[Explanation of symbols]

1 FRP structure 2, 13, 15, 22, 41, 51, 71, 81, 9
1, 101, 111, 121, 124, 131, 141
Core material 3a, 3b FRP plate 4a, 4b, 61, 62 Reinforcement member 11 Core material 12a, 12b, 14, 26, 43, 53, 73, 82
Notched recess 21 type 23 reinforcing fiber base material 24, 25, 42, 52, 72, 74, 83, 84, 9
2, 93, 94, 122, 123, 132, 142 Groove 27, 28 U-shaped reinforcing fiber base material 29 Bag base material 30 Vacuum pump 31 Valve 32 Resin 33, 34 Edge breather 95, 102, 112 Reinforcement for forming reinforcing member Fiber substrate 96 holes

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29K 105: 08 307: 04 F term (Reference) 4F100 AA01B AD11B AE01 AE06 AK01B AK04 AK07 AK12 AK15 AK21 AK33 AK44 AK51 AK52 AK53 AP00 AS00A AS00C BA02 BA03 BA06 BA10A BA10C BA13 BA41A BA41C CB00 DB17A DB17C DB20A DB20C DC23A DC23C DD05A DD05C DG01B DH02A DH02B DH02C DJ00B HA01AHA01A14A03A14A03A03A03A14A03A03 HA37 HA47 HB01 HB12 HC05 HC06 HC16 HC17 HF01 HF30 HK05 HK17 HM02 HT03 HT12 HT27

Claims (20)

[Claims] 1. A plurality of core members, an FRP plate disposed on at least one surface of the core members, and at least one end of each core member in at least a part of the core members, wherein the core members are substantially arranged with respect to the FRP plate. FR having a portion extending perpendicular to
A reinforcing member made of P, wherein the reinforcing members are arranged discontinuously when the FRP structure is viewed as a whole, and a resin diffusing means with respect to the core material. Is provided, and at least the reinforcing fiber base material and the core material of the FRP plate are integrated by a resin. 2. A plurality of core materials, an FRP plate disposed on at least one surface of the core material, and at least one end of each core material in at least a part of the core material, wherein the FRP plate is substantially disposed with respect to the FRP plate. FR having a portion extending perpendicular to
A reinforcing member made of P, wherein an arrangement density of the reinforcing member in the FRP structure is different depending on a portion of the FRP structure, and a resin diffusing means for the core material is provided. An FRP structure, wherein at least a reinforcing fiber base material and a core material of the FRP plate are integrated with a resin. 3. An FRP structure having a plurality of core members and an FRP plate disposed on at least one surface of the core members, wherein at least a part of the core members is arranged in a staggered manner, and A resin diffusion means is provided for the core material, and at least the reinforcing fiber base material of the FRP plate and the core material are integrated by a resin.
P structure. 4. The FRP reinforcing member having a portion extending substantially perpendicular to the FRP plate is provided on at least one end of each core material in at least a part of the core material. FRP structure. 5. The FRP structure according to claim 1, wherein the resin diffusion means provided for the core material comprises a groove provided in the core material. 6. An FRP structure comprising: a plurality of core members formed with a groove that becomes a path of a resin during molding; and an FRP plate disposed on at least one surface of the core member. An FRP structure characterized in that the shape of the groove differs depending on the portion of the FRP structure, and at least the reinforcing fiber base material and the core material of the FRP plate are integrated with a resin. 7. The FRP structure according to claim 6, wherein the direction of the groove differs depending on the position of the FRP structure. 8. The FRP structure according to claim 6, wherein a pitch of the groove is different depending on a portion of the FRP structure. 9. The FRP according to claim 6, wherein the depth of the groove differs depending on the portion of the FRP structure.
RP structure. 10. The F according to claim 6, wherein the width of the groove differs depending on the portion of the FRP structure.
RP structure. 11. An FRP reinforcing member having a portion extending substantially perpendicular to the FRP plate is provided at at least one end of each core material in at least a part of the core material. F described in any of 10 above
RP structure. 12. The FRP structure according to claim 1, wherein at least two types of grooves having different cross-sectional areas are formed on the surface of the core material. 13. The FRP structure according to claim 1, wherein the volume fiber content of the FRP plate is 35% or more and 65% or less, and the void ratio is 5% or less. 14. The reinforcing fiber of the FRP structure has a filament number of 10,000 to 300,00 per filament.
Characterized by using carbon fibers in the range of 0 strands,
The FRP structure according to claim 1. 15. A sandwich structure in which the FRP plate is disposed on both surfaces of the core material, and the reinforcing member is formed of both FRP plates.
The FRP structure according to claim 1, wherein the FRP structure extends between the plates. 16. The FRP structure according to claim 1, wherein the core material is made of a foam. 17. The method according to claim 1, wherein at least the FRP plate is formed by one-shot molding in which the reinforcing fiber base material is impregnated with the resin substantially simultaneously and cured substantially simultaneously. The FRP structure according to any one of the above. 18. A structure made of a fiber-reinforced inorganic material, comprising a plate-like material made of a fiber-reinforced inorganic material instead of the FRP plate in the FRP structure according to any one of claims 1 to 17. 19. A mold in which a plurality of core materials and a reinforcing fiber base material extending in the surface direction of the core material on at least one side of the core material are arranged, and a resin is vertically or vertically applied to the core material. Place a medium for diffusion or form a resin diffusion path in the core material to diffuse resin in the surface direction, cover the whole with the bag base material, and then vacuum the inside covered with the bag base material. 18. A state is formed, and a resin is injected and diffused at least on the surface of the reinforcing fiber base material, and the resin is impregnated into the reinforcing fiber base material to perform one-shot molding. 3. The method for producing an FRP structure according to item 1. 20. A reinforcing member forming base material having a portion extending substantially perpendicular to the reinforcing fiber base material is disposed at at least one end of each core material in at least a part of the core material in the mold. 20. A method for manufacturing an FRP structure according to claim 19.