JPH05103566A - Fishing rod - Google Patents

Abstract

PURPOSE:To obtain a fishing rod securing a good tensile flexural strength and simultaneously having a sufficient collapse strength by employing PAN carbon fibers in a reinforcing fiber layer having the fiber direction in the axial direction of the fishing rod and further employing pitch carbon fibers in a reinforcing layer having the fiber direction in the circumferential direction of the fishing rod. CONSTITUTION:Reinforcing fiber layers 2, 3 comprising pitch carbon fibers having the fiber direction in the circumferential direction of the fishing rod are integrally wound on the inner and outer sides or either one side of a reinforcing layer 1 comprising PAN carbon fibers having the fiber direction in the axial direction of the fishing rod to obtain the fishing rod having a large tensile strength, a large flexural strength, a high elastic modulus and a small elongation and prevented in its compression collapse and deformation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a fishing rod using carbon fiber as a reinforcing fiber.

[0002]

2. Description of the Related Art Conventionally, in a fishing rod formed by winding a prepreg in which a reinforcing fiber made of carbon fiber is impregnated with a thermosetting synthetic resin, a prepreg of a reinforcing fiber sheet whose fiber direction is an axial direction and a circumferential direction reinforcement It is known to form a tubular body by laminating a prepreg of a fiber sheet and
In the conventional method, bread-based carbon fiber having high strength is used as the reinforcing fiber whose fiber direction is the axial direction and the circumferential direction.

[0003]

The conventional fishing rod can improve the tensile strength and the bending strength due to the characteristics of the pan-based carbon fiber, but since it has a small elastic modulus and a large elongation, There is a problem that the function of preventing the compression crushing and the deformation by the reinforcing fiber is not sufficiently exerted.

In view of these circumstances, the present invention uses bread-based carbon fibers as the reinforcing fibers whose fiber direction is the axial direction and uses pitch-based carbon fibers as the reinforcing fibers in the circumferential direction.
It is an object of the present invention to provide a fishing rod that has sufficient tensile strength and at the same time has sufficient crush strength.

[0005]

In order to achieve the above object, the present invention relates to a fishing rod formed by winding a prepreg in which a reinforcing fiber is impregnated with a thermosetting synthetic resin, and a reinforcing fiber layer whose fiber direction is an axial direction. Is a bread-based carbon fiber, and the reinforcing fiber layer whose fiber direction is the circumferential direction is a pitch-based carbon fiber.

The bread-based carbon fiber in the present invention means one formed by firing polyacrylonitrile fiber, and the pitch-based carbon fiber means one formed by firing tar of petroleum or coal.

The bread-based carbon fiber has an elastic modulus of 24.
Long fibers with a tensile strength of 400 kg / mm ² or more at ~ 60 ton / mm ² are used, and the pitch-based carbon fiber has an elastic modulus of 40
~80ton / mm ² intended tensile strength 260~400kg / mm ² in, it is preferable to particularly use a long fiber. Further, the prepreg made of pitch-based carbon fibers whose fiber direction is the circumferential direction is either one of the inner and outer sides of the reinforcing fiber layer formed by winding one or more prepregs made of the pan-based carbon fiber whose fiber direction is the axial direction. Or, it is integrally wound on both sides.

[0008]

The pitch-based carbon fiber, which has a high tensile elastic modulus and a compressive elastic modulus in the fiber direction and a small elongation, has a fishing rod having sufficient tensile and bending strength due to the bread-based carbon fiber of the reinforcing fiber layer whose fiber direction is the axial direction. Improves the strength of the fishing rod by preventing crushing and deformation of the fishing rod.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.
Bread-based carbon fibers aligned in the axial direction are wound one or more times with a prepreg impregnated with a thermosetting synthetic resin, and the fiber direction is the axial direction. Reinforcing fiber layers 2 and 3 formed of a prepreg obtained by impregnating aligned pitch-based carbon fibers with a thermosetting synthetic resin and having a circumferential fiber direction are integrally provided to form a tubular fishing rod 4.

The bread-based carbon fiber has a diameter of 5 to 7
μ, strength 400kg / mm ² or more, elastic modulus 24-60ton / mm ²
And the pitch-based carbon fiber has a diameter of 8 to 11
μ, strength 260 to 400 kg / mm ² , elastic modulus 40 to 80 ton /
mm ² is used, and a scrim sheet of glass fiber or the like may be attached to the prepreg forming the reinforcing fiber layer 1 whose fiber direction is the axial direction.

In the above embodiment, however, the reinforcing fiber layers 2 and 3 whose fiber directions are circumferential are the reinforcing fiber layers 1 whose fiber direction is axial.
However, the reinforcing fiber layers 2 and 3 are usually wound with one ply, but may be wound with a plurality of plies, if necessary. it can. The prepreg forming the reinforcing fiber layer 1 is
The resin amount is 10 to 30% by weight and the thickness is 0.05 to 0.2 mm, and the prepreg of the reinforcing fiber layers 2 and 3 in the circumferential direction is 35 to 65% by weight and 0.07 mm in thickness. The following are preferably used.

[0012]

INDUSTRIAL APPLICABILITY According to the present invention, the bread-based carbon fiber in the reinforcing fiber layer whose fiber direction is the axial direction imparts sufficient tensile and bending strength to the fishing rod, and the pitch-based carbon fiber in the reinforcing fiber layer whose fiber direction is the circumferential direction is It is possible to provide a high-strength fishing rod having tension and strength suitable for fishing operation by preventing compression crushing and deformation of the fishing rod. In addition, the bread-based carbon fiber has a low carbonization yield of 40 to 50%, while the pitch-based carbon fiber has a high carbonization rate of 80 to 90%, and since coal tar and petroleum tar can be used, resource saving and high strength are achieved. The fishing rod can be manufactured economically and inexpensively.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a fishing rod of the present invention.

FIG. 2 is a vertical sectional side view of the same.

[Explanation of symbols]

 1 Reinforcing fiber layer whose fiber direction is the axial direction 2.3 Reinforcing fiber layer whose fiber direction is the circumferential direction 4 Fishing rod

Claims (1)

[Claims] 1. A fishing rod formed by winding a prepreg in which a reinforcing fiber is impregnated with a thermosetting synthetic resin, and a reinforcing fiber layer having a fiber direction in the axial direction and a reinforcing fiber having a fiber direction in the circumferential direction. A fishing rod characterized in that pitch-based carbon fibers are used for the respective fiber layers.