JP2673562B2 - Fibrous rod-like structural material joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to binding each reinforcing fiber of a rod-shaped fibrous body formed of reinforcing fibers, as disclosed in, for example, JP-A-61-290150. The present invention relates to a joint for joining fibrous rod-shaped structural materials, which are formed by binding each other with an agent.

(Prior Art) Conventionally, as a joint for this kind of fibrous rod-shaped structural material, for example, a woven fabric or a non-woven fabric impregnated with an uncured binder around the outer periphery of the butted portion of the rod-shaped structural material It is known that the rod-shaped structural material is wound by winding and curing the binder.

(Problems to be Solved by the Invention) However, in the conventional joining by wrapping a woven fabric or a non-woven fabric impregnated with a binder, there is a limit to the binding force by the binder, and therefore the joining force of the rod-shaped structural material is limited. Is not enough.

(Means for Solving the Problems) An object of the present invention is to solve the above-mentioned conventional problems and to provide a joint for a fibrous rod-shaped structural material, which can join the fibrous rod-shaped structural material extremely strongly. According to the invention, a tubular fiber-reinforced synthetic resin molded body having a central portion bulging and tapering toward both end openings through which a fibrous rod-shaped structural material is inserted, and a wedge member housed in the molded body. And the reinforcing fiber is wound around the outer peripheral surface of the molded body to reinforce the molded body.

Further, the wedge member is composed of a plurality of ceramic wedge members arranged so as to surround the fibrous rod-shaped structural material on the outer periphery thereof, and the inner peripheral surface of the wedge member is formed into a rough surface. You may do it.

(Operation) When the outer periphery of the fibrous rod-shaped structural material is surrounded by the wedge member housed in the molded body, when the two structural materials joined are pulled in the directions away from each other, the initial Among them, the tensile force is supported by the frictional force with the wedge member, and when the applied tensile force is further increased, the wedge member acts on the structural material to tighten the structural material from the outer periphery. Moreover, since the molded body is reinforced by the reinforcing fiber, the molded body is prevented from expanding when the wedge action is exerted, and tightening to the fibrous rod-shaped structural material caused by the wedge action of the wedge member. The function effectively functions to bond the structural material extremely strongly.

(Example) Next, the Example of this invention is described according to an accompanying drawing.

The embodiment of FIGS. 1 to 3 shows a state in which two fibrous rod-shaped structural materials are joined by a joint. In the drawings, 1 is a wedge member, 2 is a cylindrical fiber-reinforced synthetic resin molding. Show.

The illustrated embodiment shows an example in which three wedge members 1 are used for one fibrous rod-shaped structural material, and each wedge member 1 is made of a ceramic material, and its front end 3 to rear end 4 are formed. The wedge-shaped structural material 5 is provided with an inner peripheral surface 6 that is in contact with the outer periphery and is formed into a rough surface, and when the inner peripheral surfaces 6 of the respective wedge members 1 are arranged adjacent to each other, they become substantially conical. I did it.

Then, when the inner peripheral surface 6 of each wedge member 1 is covered with the fibrous rod-shaped structural material 5 to surround the outer periphery of the structural material 5, each wedge member 1 covers the entire outer periphery of the structural material 5. I tried to tighten it.

The number of the wedge members 1 is not limited to the above three, but may be two or four or more depending on the thickness and shape of the fibrous rod-shaped structural material 5 used.

The cylindrical fiber-reinforced synthetic resin molded body 2 is formed by covering a fiber body obtained by impregnating, for example, an epoxy resin with an aromatic polyamide fiber so that the wedge members 1 can be housed therein, curing the knitted body, and knitting into a cylindrical shape. The part 7 bulges out and each end opening 8
It is formed in a tapered shape toward. The molded body 2
Reinforcing fiber 9 was wound around the outer periphery of so as to reinforce the molded body 2. The reinforcing fiber 9 is made of, for example, an aromatic polyamide fiber, and is impregnated with a binder such as an epoxy resin and wound around the entire outer periphery of the molded body 2 from one end opening 8 to the other end opening 8. Then, the binder was cured so that the binder was wound.

The cylindrical fiber-reinforced synthetic resin molded body 2 is not limited to aromatic polyamide fibers, but may be inorganic fibers such as carbon fibers and glass fibers, organic fibers such as polyester fibers and high-strength polyolefin fibers, or a combination thereof. The resin material to be impregnated into the fiber and cured is not limited to the epoxy resin, and a polyester resin, a vinyl ester resin, a phenol resin, a polyimide resin, or the like can be used.

Further, the reinforcing fiber 9 is not limited to aromatic polyamide fiber, and inorganic fibers such as carbon fiber and glass fiber, organic fiber such as polyester fiber and high strength polyolefin fiber may be used alone or in combination thereof. The reinforcing fiber 9 may be in a strand shape, a roving shape, or the like, and the number of windings may be appropriately selected according to the degree of reinforcement. Further, the binder impregnated in the fiber is not limited to an epoxy resin and may be a polyester. Resins such as resins, vinyl ester resins, phenol resins, and polyimide resins can be used.

 Next, a method of using the joint of the above embodiment will be described.

In the illustrated example, as the fibrous rod-shaped structural material 5, a plurality of strands 5b made of, for example, aromatic polyamide fibers 5a disclosed in Japanese Patent Laid-Open No. 61-290150 are knitted in a braided shape, and each fiber 5a is formed. An example will be shown in which the rod-shaped structural material 5 is bonded to each other with a binder 5c made of, for example, an epoxy resin, and the surface of which is provided with unevenness by meshes.

First, two fibrous rod-shaped structural materials 5 and 5 are brought into contact with each other at their opposing end surfaces, the tips 3 of the wedge members 1 face in mutually opposite directions, and the rear ends 4 of the wedge members 1 face each other. The outer peripheral surface of each end 5d of each fibrous rod-shaped structural material 5 is covered with the inner peripheral surface 6 of each wedge member 1 so as to be in contact with each other. Next, the entire outer peripheral surface of each wedge member 1 is covered with a fibrous body made of, for example, an aromatic polyamide fiber impregnated with an epoxy resin, and then the resin is cured so that the central portion 7 swells and both ends are expanded. The tapered tubular fiber-reinforced synthetic resin molded body 2 is formed toward the opening 8. Further, a tubular fiber-reinforced synthetic resin molded body 2 accommodating each wedge member 1
Around the outer peripheral surface of one of the openings 8 and the other opening 8, a reinforcing fiber 9 in the form of a strand of aromatic polyamide fiber is impregnated with a binder made of, for example, an epoxy resin, and wound, and then the binder is cured and wound. Wearing to reinforce the molded body 2.

Since the inner peripheral surface 6 of the wedge member 1 is formed as a rough surface, the contact area between the inner peripheral surface 6 and the fibrous rod-shaped structural material 5 increases, and the frictional resistance between them increases.

(Effects of the Invention) As described above, according to the present invention, the outer periphery of the tubular fiber-reinforced synthetic resin molded body containing the wedge member is reinforced with reinforcing fibers over the entire surface to prevent expansion, and the fibrous rod-shaped structure The clamping action on the fibrous rod-shaped structural material due to the wedge action of the wedge member surrounding the outer periphery of the structural material effectively functions, and the structural material can be bonded very firmly. Further, in the case of using the fibrous rod-shaped structural material as the structural material of the electromagnetic resistant building, the effect of being able to join these structural materials without affecting the electromagnetic resistant building by the joint of the present invention which does not use metal as a constituent material Have.

[Brief description of the drawings]

1 and 2 show an embodiment of the present invention,
FIG. 1 is a front view of a joint for a material for a fibrous rod-shaped structure, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a perspective view showing an expanded state of each wedge member. . 1 ... Wedge member 2 ... Cylindrical fiber reinforced synthetic resin molding 5 ... Fibrous rod-shaped structural material 6 ... Inner peripheral surface 7 ... Center part 8 ... Opening 9 ... Reinforcing fiber

Claims (2)

(57) [Claims] 1. A tubular fiber-reinforced synthetic resin molded body having a central portion bulging and being tapered toward both end openings through which a fibrous rod-shaped structural material is inserted, and a wedge member housed in the molded body. Further, a reinforcing fiber is wound around the outer peripheral surface of the molded body to reinforce the molded body, which is a joint for a fibrous rod-shaped structural material. 2. The wedge member comprises a plurality of ceramic wedge members arranged so as to surround the fibrous rod-shaped structural material so as to surround the fibrous rod-shaped structural material, and the inner peripheral surface of the wedge member has a rough surface. The fibrous rod-like structural material joint according to claim 1, which is formed.