JPH0230275Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a columnar material made of fiber-reinforced plastic with improved mechanical strength.

Beams and pillars (hereinafter referred to as pillars) for panel-assembled water tanks, chemical plant structures, and the like require not only corrosion resistance but also mechanical strength such as high tensile strength, high compression strength, and high torsional strength. Fiber-reinforced plastic columns (hereinafter referred to as FRP columns) have excellent corrosion resistance, are lightweight, have electrical insulation properties, and are better structural materials than other metal materials in terms of high tensile strength and high torsion. Although FRP columnar materials are inherently lightweight, structural improvements are often made to further increase the mechanical strength per unit weight. The present invention provides an FRP columnar material with improved mechanical strength from this point of view. The present invention will be described below with reference to the accompanying drawings.

The basic structure of the present invention is that continuous fibers as shown in Fig. 3-4 are wound around a core material having continuous grooves 5 facing each other on the longitudinal outer circumference as shown in Fig. 4-1. be. The center may be hollow as shown in Figure 4, and the material is not limited, such as FPP, metal,
It is made of wood, plastic, etc. Continuous fibers include
Impregnated with or integrally applied with thermosetting resin or thermoplastic resin. It is preferable to provide end members shown in FIG. 1 and 2 at both ends so that joining with bolts, bottles, etc. can be facilitated, and the continuous fibers can be effectively wound. In order to increase the mechanical strength per weight, the core material 1 of the columnar material is
Preference is given to an FRP drawing material having a central cavity, and it is advantageous if the end piece fits into this cavity. The outer periphery of the end member has a groove similar to the core material, and has a curved surface so that large local forces are not applied to the continuous fibers being wound. An FRP pipe 3 made of metal or formed by filament winding is fitted to the end member 2 as a contact point during bolt connection.
It is preferable to supplement the mechanical strength of the end member 2. For the molding method of the end member, an injection molding method of resin reinforced with short fibers, so-called BMC, etc. can be adopted.
When joints using bolts, pins, etc. are required, compression and tensile strength can be accurately transmitted to the core material using the end members as described above.

Glass roving is preferable as the material for the continuous fibers 4 to be wound in terms of performance and price.
Metal fibers such as steel, alumina, and boron; organic fibers such as polyester, nylon, and Kevlar;
Alternatively, it may be carbon fiber or natural fiber. The continuous fibers wound around the outer periphery of the core material are integrally bonded and solidified to the outer periphery via a base resin such as a thermosetting resin or a thermoplastic resin. Examples of the thermosetting resin include unsaturated polyester resin, diallyl phthalate resin, epoxy resin, and phenol resin, and examples of the thermoplastic resin include polycarbonate resin, polyvinyl chloride resin, and polyacetal resin. Since the FRP columnar material of the present invention has continuous fibers wound around the outer periphery in the longitudinal direction, it can exhibit particularly high strength against bending and tension.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of the FRP columnar material of the present invention, and FIG. 2 is a plan view thereof. 3 is a cross-sectional view of the core material 1 in the width direction, and FIG. 4 is a perspective view of the core material 1. 2... End member, 4... Continuous fiber, 5... Continuous groove.

Claims (1)

[Scope of utility model registration request] A fiber-reinforced core material having continuous grooves facing each other on the outer periphery in the longitudinal direction, the grooves being formed by winding resin-impregnated continuous fibers in the longitudinal direction and integrally molding and solidifying them. Plastic pillars.