JPH0942248A - Rivet made of fiber-reinforced resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rivet made of fiber-reinforced resin to have a part having excellent fastening workability and being apt to deform and effect fastening having excellent corrosion resistance and fastening strength. SOLUTION: A rivet is made of fiber-reinforced resin having a head part 12 arranged at one end of a columnar part 11. Fiber-reinforced resin consists of fiber-reinforced resin, of which the rivet made of fiber-reinforced resin consists, containing long fibers having 20-70wt.% a fiber percentage content in a resin component. At least the specified length on one end side 111 of columnar part 11 wherein a number of long fibers are aligned along a longitudinal direction and a head part 12 arranged at one end thereof is integrally completely cured, and at least the specified length on the other end side 112 of the columnar part 11 is brought into a non-cured state or a half-cured state. During fastening of an object to be fastened, the part in the non-cured part or the half-cured state on the other end side 112 is deformed after that, it is completed cured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber reinforced resin rivet.

[0002]

2. Description of the Related Art Heretofore, metal rivets have been widely marketed and used as rivets used for fastening objects to be fastened. However, the metal rivet has a poor workability because the material is hard, and it is dangerous to work at a construction site where the scaffolding is poor, and it is generally expensive.

In view of this point, for example, Japanese Examined Patent Publication No. 63-11
As described in Japanese Patent No. 523,523, an elongated mandrel having a large anvil part at one end and a grip part at the other end, a sleeve placed around the mandrel, and a sleeve placed between the sleeve and the mandrel. A blind rivet has been proposed which is composed of an uncured thermosetting plastic tubular body and can be fastened from one side.

[0004]

However, this blind rivet is composed of three parts, a sleeve having a large anvil part in the radial direction, a mandrel and a tubular body,
Since the production requires separate steps, it is complicated and a large fastening strength cannot be obtained. Further, an uncured thermosetting resin part may be considered as a plastic part in which a sleeve having a large anvil part in the radial direction and a deformed part are integrated, but as a practical problem, the cured part and the uncured part are separated. There is a problem that it is difficult to hold it only by controlling heat.

The present invention has been made for the purpose of solving the above-mentioned conventional problems, and has a portion that is easily deformed and has excellent fastening workability, and is excellent in corrosion resistance and fastening strength. The purpose of the present invention is to provide a fiber-reinforced resin rivet that can be fastened.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a fiber-reinforced resin rivet having a head portion at one end of a columnar portion,
The fiber reinforced resin forming the fiber reinforced resin rivet is composed of a resin component containing long fibers at a fiber content of 20 to 70% by weight, and has a columnar section in which a large number of long fibers are arranged along the longitudinal direction. The one end side and the head provided at the one end thereof are completely hardened integrally, and at least a certain length of the other end side of the columnar portion is in an uncured or semi-hardened state, and the other end side is fastened at the time of fastening an object to be fastened. It is a fiber-reinforced resin rivet that can be completely cured after deformation of an uncured or semi-cured portion.

In the present invention, a curable resin is used as the resin component forming the fiber reinforced resin, and examples thereof include unsaturated polyester resin, vinyl ester (epoxy acrylate) resin and urethane acrylate resin. The curable resin may be used alone or in combination of two or more.

In the curable resin, a curing agent and, if necessary, additives such as a filler, an inhibitor, a pigment, a low-shrinking agent, a release agent and a thickener are added. A thermosetting agent or a photoinitiator is used as the curing agent. As the thermosetting agent, conventionally known ones can be used, and examples thereof include methyl ethyl ketone peroxide, t-butyl perbenzoate, benzoyl peroxide, and the like. Cobalt naphthenate, manganese naphthenate, dimethylaniline. A curing accelerator such as the above may be used in combination.

As the photoinitiator, conventionally known photoinitiators can be used, and examples thereof include benzoin alkyl ether type, acetophenone type, benzophenone type and thioxanthone type.

In the present invention, the above curing agents may be used alone or in combination of two or more kinds. If both the uncured and semi-cured parts can be heat-cured and light-cured by using a heat-curing agent and a photoinitiator together, the ease of fastening work at the fastening site of fiber-reinforced resin rivets It is convenient because any curing method can be adopted according to the above.

In the present invention, examples of the material of the long fibers forming the fiber reinforced resin include inorganic fibers such as glass fibers and carbon fibers, organic fibers such as aramid fibers, vinylon fibers and polyester fibers. Examples of the form of the long fiber include a monofilament, a roving form, a strand form, a cross form, a mat form, a net form, and a net form, and a continuous strand mat made of continuous fibers may be used.

The fiber content of the long fibers in the fiber reinforced resin is 20 to 70% by weight. If the fiber content is too low, the reinforcing effect due to the long fibers is small, and if the fiber content is too high,
Since the resin component is reduced, the adhesive force between filaments of long fibers is weak, and the rivets made of fiber reinforced resin obtained in both cases have insufficient fastening strength.

In the present invention, the uncured state in at least a fixed length on the other end side of the columnar portion means a state in which the column is not completely cured yet, and is a concept including an uncured state and a semi-cured state, which is being stored. The semi-cured state is preferably such that it is not easily deformed due to its own weight or contact with other members during transportation.

[0014]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an example of a fiber-reinforced resin rivet of the present invention. Reference numeral 1 denotes a fiber-reinforced resin rivet, in which long fibers are impregnated with a curable resin containing one or both of a thermosetting agent and a photoinitiator, and a fiber content of 20 to 7
It is made of 0% by weight of fiber reinforced resin, and a head 12 is provided at one end of the columnar part 11. Column 1
In Fig. 1, long fibers are continuously arranged in the curable resin so as to be oriented along the longitudinal direction.

One end side 111 of the columnar portion 11 and the head portion 12 provided at one end thereof are integrally and completely cured. The other end side 112 of the columnar portion 11 is in an uncured or semi-cured state, leaving the other end edge, and the other end edge is completely hardened. When the object to be fastened is fastened, the part in the uncured or semi-cured state over a certain length on the other end side can be deformed and then cured. The aluminum foil 2 is wound around the other end 112 including the uncured or semi-cured portion of the columnar portion 11 so that the curing agent is not decomposed by blocking light rays and the curing reaction is not started. ing.

Next, the manner of use of the fiber reinforced resin rivet of FIG. 1 will be described with reference to FIGS. As shown in FIG. 2, 3 and 4 are two objects to be fastened by the fiber-reinforced resin rivet of the present invention, and they are superposed so that the through holes 31 and 41 provided in them respectively communicate with each other.

First, the aluminum foil 2 wrapped around the other end of the columnar portion 11 of the fiber reinforced resin rivet 1 is peeled off, and the fiber reinforced resin rivet 1 is attached to the other end side 112.
Thus, the head 12 provided at the other end on the opposite side is inserted into the through holes 31 and 41 of the objects to be fastened 3 and 4, and is brought into contact with the end surface of the wall portion around the through hole 31 of the fastened portion 3. .

Next, as shown in FIG. 3, while the head 12 of the fiber reinforced resin rivet 1 is pressed against the wall surface of the object to be fastened 3, it is compressed from the other end edge of the other end side 112 and The uncured or semi-cured portion of the end side 112 is swollen. While maintaining that state, the uncured or semi-cured portion is completely cured by thermosetting or photocuring, and the fastening of the object to be fastened is completed.

[0019]

The fiber-reinforced resin rivet of the present invention comprises the fiber-reinforced resin forming the fiber-reinforced resin rivet containing long fibers at a fiber content of 20 to 70% by weight in the resin. One end side of the columnar section along which a number of long fibers are arranged along with the head provided at the one end are completely cured integrally, and at least a certain length on the other end side of the columnar section is in an uncured or semi-cured state. The uncured or semi-cured part on the other end side is deformed at the time of fastening the object to be fastened and then completely hardened. It can be easily fastened by completely hardening it after deformation of the part in the state, so it has excellent fastening workability.Because it is made of a fiber reinforced resin material with sufficient corrosion resistance and strength, it has excellent durability and fastening strength. Excellent fastening can be performed.

[0020]

The present invention will be described below with reference to examples. Example 1 As a curable resin, 100 parts by weight of an unsaturated polyester resin (manufactured by Japan Yupica, trade name "4516") and a thermosetting agent (manufactured by Ciba Geigy, trade name "Irgacure 65"
1 ") 1.5 parts by weight was used and impregnated with glass roving to prepare a fiber reinforced resin material having a fiber content of 45% by weight.

By using this fiber-reinforced resin material, press molding is carried out, and one end side 11 of the columnar part 11 as shown in FIG.
1 and a head 12 provided at one end thereof are completely hardened integrally, the other end side 112 of the columnar portion 11 is in an uncured state leaving the other end edge, and the other end is completely hardened. A reinforced resin rivet 1 was manufactured.

Using this fiber-reinforced resin rivet 1,
As described with reference to FIGS. 2 and 3, from the other end side 11, the objects to be fastened 3, 4 made of a combination of a square bar and a plate.
Through the through-holes 31 and 41, and the head 12 provided at one end thereof is brought into contact with the wall surface around the through-hole 31 of the fastened portion 3, pressed and compressed from the other edge, and the like. It was possible to swell the uncured portion on the end side and hold the uncured portion in that state, while the uncured portion was heat-cured to be completely cured and to fasten the object to be fastened.

[0023]

The fiber-reinforced resin rivet according to the present invention, which has the above-mentioned structure, has excellent fastening workability and can be fastened with excellent durability and fastening strength.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an example of a fiber-reinforced resin rivet of the present invention.

FIG. 2 is a cross-sectional view showing the first half of the process of using the fiber-reinforced resin rivet shown in FIG.

FIG. 3 is a cross-sectional view showing a latter half step of the usage mode of the fiber-reinforced resin rivet shown in FIG.

[Explanation of symbols]

 1 Fiber Reinforced Resin Rivet 11 Columnar Part 12 Head 111 One End Side 112 The Other End Side

Claims (1)

[Claims] 1. A fiber reinforced resin rivet in which a head is provided at one end of a columnar portion, wherein the fiber reinforced resin forming the fiber reinforced resin rivet has a fiber content of 20 to 20 in the resin component.
70% by weight of long fibers are contained, and one end side of a columnar portion in which a large number of long fibers are arranged along the longitudinal direction and a head provided at the one end are integrally completely cured to form a columnar shape. At least a certain length on the other end side of the portion is in an uncured or semi-cured state, and at the time of fastening an object to be fastened, the portion in the uncured or semi-cured state on the other end side is deformed and then completely cured. Characteristic fiber reinforced resin rivet.