Abstract:
The present invention relates to a joint structure for an FRP roofing member wherein two or more FRP sandwich structures are butt joined, an FRP connecting layer extends across the surfaces of both ends of the sandwich structures, and a layer containing a resin distribution medium is provided between the abutting end faces. The present invention also relates to a method for joining FRP roofing members. In accordance with the FRP roofing member joint construction of the present invention, the problems associated with conventional joint structures can be completely overcome, and the ends of the sandwich structures can be easily, firmly and cheaply joined together. As well as ensuring high joint strength and rigidity, an excellent appearance can be achieved.
Abstract:
A production method for an FRP cylindrical body, characterized by comprising the steps of disposing a resin diffusion medium and a reinforcing fiber base material on the outer or inner periphery of a cylindrical or sold core, covering the medium and the base material with an airtight material before vacuumizing the inside, and injecting resin for diffusion in a surface direction of the medium and for impregnation into the base material; an FRP cylindrical body characterized in that an FRP layer and a resin diffusion medium are integrated with each other concentrically; and an FRP cylindrical body comprising two or more peripherally-split members which are integrally joined; whereby it is possible to produce even long or large-diameter FRP cylindrical bodies easily and at low costs.
Abstract:
An FRP roof material which eliminates the possibility of occurrence of rusting, can provide a light weight and sufficiently high strength and rigidity, can deliver a high insulating feature, can contribute to an increase in earthquake-resistance of a building, and also can be formed in any highly attractive shape easily, characterized by comprising a sandwiched structural body in which a pair of plates (3a, 3b) made of FRP are disposed at an interval and rib structural bodies (4) connecting the pair of plates to each other are provided between them, wherein, when phenol resin is used as FRP matrix resin or refractory material is provided on the surface of the roof material, the roof material excellent also in fire resistance can be obtained and, in addition, when end parts of the material are butted against each other for connection, a resin diffusing medium is disposed between butted end faces, reinforcing fibers are disposed over the entire surface of both end face parts, and resin is filled into the resin diffusing medium so that the resin can be diffused to the reinforcing parts to assure connection.
Abstract:
A production method for an FRP cylindrical body, characterized by comprising the steps of disposing a resin diffusion medium and a reinforcing fiber base material on the outer or inner periphery of a cylindrical or sold core, covering the medium and the base material with an airtight material before vacuumizing the inside, and injecting resin for diffusion in a surface direction of the medium and for impregnation into the base material; an FRP cylindrical body characterized in that an FRP layer and a resin diffusion medium are integrated with each other concentrically; and an FRP cylindrical body comprising two or more peripherally-split members which are integrally joined; whereby it is possible to produce even long or large-diameter FRP cylindrical bodies easily and at low costs.
Abstract:
An FRP roof material which eliminates the possibility of occurrence of rusting, can provide a light weight and sufficiently high strength and rigidity, can deliver a high insulating feature, can contribute to an increase in earthquake-resistance of a building, and also can be formed in any highly attractive shape easily, characterized by comprising a sandwiched structural body in which a pair of plates (3a, 3b) made of FRP are disposed at an interval and rib structural bodies (4) connecting the pair of plates to each other are provided between them, wherein, when phenol resin is used as FRP matrix resin or refractory material is provided on the surface of the roof material, the roof material excellent also in fire resistance can be obtained and, in addition, when end parts of the material are butted against each other for connection, a resin diffusing medium is disposed between butted end faces, reinforcing fibers are disposed over the entire surface of both end face parts, and resin is filled into the resin diffusing medium so that the resin can be diffused to the reinforcing parts to assure connection.
Abstract:
A sound−proof wall made of FRP in the form of a sound−proof wall panel that comprises a core and skin members made of FRP positioned on both sides of the core and whose weight per unit area is within the range of 10 − 60 kg/m 2 ; and a method of producing the same. This sound−proof wall, though light in weight, has a superior sound insulation property and will never corrode because it is made of FRP. Further, it has a high degree of freedom of engineering design including sound−proof property, design, and shape, capable of producing a desired sound−proof wall with ease. Further, since it has a high specific strength, it is possible to attain a drastic weight reduction while retaining the necessary strength, and to facilitate working, shorten construction time, and reduce construction cost.
Abstract:
A method of manufacturing a flow sheet capable of smoothening the surface of the flow sheet for a paper machine and easily handling the flow sheet, wherein reinforcement fibers are disposed in a mold (5), and the entire part of the mold (5) is covered by sealing members (10) and (11) to form a closed space (12) in the sealing members (10) and (11). While air in the closed space (12) is sucked from one end of the closed space (12), a matrix resin is supplied from the other end of the closed space (12) to the reinforcement fibers, impregnated into the reinforcement fibers, and hardened. As a result, the flow sheet having a surface smoothness of 0.25 μm or less in arithmetic average roughness can be provided.
Abstract:
PROBLEM TO BE SOLVED: To provide an FRP rack cover which is light-weight, proper in handling, and has high workability in protecting an electrical cable and a communication cable wired on a ladder-shaped rack under an elevated bridge or the like, with respect to flames from the lower part. SOLUTION: This rack cover consists of an FRP skin member, having a U-shaped cross-section having folded sections on both sides of a horizontal part, and at least two rib members, each of which is an inner surface of the U-shaped skin member and which are arranged in the longitudinal direction. The ratio of the length to the cross width of the skin member lies within a range of 2 to 20. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a further lighter blade structure of a state having a higher bending fatigue strength than that of prior art. SOLUTION: The blade structure 1 of a windmill made of an FRP containing reinforcing fibers and the resin having a width W, a flange 10 of a girder having a width Wf of a range of 0.2 to 0.5 W at sectional central positions 3 and 4 of gravity of the blade 1, carbon fiber-reinforced resin layers 14 and high elongation fiber-reinforced resin layers 15 alternately laminated thereon. In this case, a total thickness 2Tf occupying the upper and lower flanges 10 of a composite layer 17 is in a range of 10 to 30% of the thickness T of the blade. The layer 17 is a laminate containing a carbon fiber-reinforced resin layer having a thickness of at least one layer oriented in a longitudinal direction of the blade of at least 70% or more of its volume is 16 mm, and the glass fiber-reinforced resin layer having a thickness of 0.2 to 1.5 mm.
Abstract:
PURPOSE:To aim at improvement in strength and the promotion of lightweightiness in combination, by forming the spoke supporting part alone to be thicker than other parts, in case of a rim consisting of fiber reinforced plastics. CONSTITUTION:A rim 1 is formed into an almost heart-shaped cross-section form with hollow fiber reinforced plastics, and a tire 2 is fitly attached to the concave outer surface. And, metallic eyelets 3 for stretching a spoke 4 are attached to this rim 1 at a constant pitch in the longitudinal direction. In this case, a part, where each eyelet 3 is attached, of the rim 1, namely, a support part of the spoke 4 is formed to be thicker than other parts. With this constitution, only the required part of the rim 1 is formed in a thicker wall, making it fully resistible to stretching force of the spoke 4, whereby improvement in strength and the promotion of lightweightiness both come to fruition.