JPH04341831A - Fishing rod - Google Patents

Abstract

PURPOSE:To prevent a wound and laminated part of prepregs forming inner and outer layers from cracking and ply separation phenomena and to improve strength of a fishing rod in the fishing rod wherein the inner and outer layers are formed with prepregs wherein the arranging direction of a reinforcing fiber is in the peripheral direction. CONSTITUTION:In a fishing rod 1 constituted of an intermediate layer 2 formed by winding a prepreg wherein the arranging direction of reinforcing fibers is in the axial direction and an inner layer 3 and an outer layer 4 formed inside and outside of the intermediate layer and consisting of prepregs wherein the arranging directions of reinforcing fibers are in the peripheral direction, the reinforcing fibers 5 in the peripheral direction on the laminated part of the prepregs forming the inner layer 3 and the outer layer 4 intermeshes and presses into another reinforcing fiber 5 each other to bind together integrally and to prevent the laminated part from occurrence of cracking and ply separation and to improve tensile and shear strengths.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing rod made of prepreg.

0002

[Prior Art] Inner and outer layers are formed by winding prepregs whose reinforcing fibers are aligned in the circumferential direction on the inner and outer sides of an intermediate layer formed by winding prepregs whose reinforcing fibers are aligned in the axial direction. Fishing rods constructed as above are known from Japanese Unexamined Patent Publication No. 63-39327 and Japanese Utility Model Publication No. 2-16628. In these cases, both side edges of the prepreg forming the inner and outer layers are
Either they are butted against each other, or they are polymerized in a stepped manner as shown in FIGS. 5 and 7 of the above-mentioned Japanese Patent Application Laid-Open No. 63-39327.

0003

[Problems to be Solved by the Invention] However, in the above-mentioned butting method, since the circumferentially aligned reinforcing fibers are not continuous at the butting portion, cracks occur in the resin at the butting portion when stress such as bending or compression is applied to the fishing rod. There are defects that cause a decrease in strength, and the latter polymerization method also has the problem that delamination occurs in the overlapped portion at the step portion, which also causes a decrease in strength.

In view of these current circumstances, the present invention provides a fishing rod in which inner and outer layers are formed by winding prepregs in which reinforcing fibers are aligned in the circumferential direction on the inner and outer sides of the intermediate layer. It is an object of the present invention to provide a fishing rod that prevents the phenomenon of peeling at the parts of the fishing rod.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an intermediate layer in which the reinforcing fibers are arranged in the axial direction on the inner and outer sides of an intermediate layer formed by winding a prepreg in which the reinforcing fibers are arranged in the axial direction. In a fishing rod that is integrally constructed by winding circumferential prepregs to form inner and outer layers, both side edges of the inner and outer prepregs are overlapped, and the reinforcing fibers aligned in the circumferential direction at the overlapped portion are aligned with each other. The reinforcing fibers are joined together so that the thickness of the overlapping portion is approximately the same as the thickness of the prepreg.

[0006] The length of the overlapping portion of the prepreg in which the reinforcing fibers are aligned in the circumferential direction is set to 100 to 600 times, preferably 300 to 600 times, the diameter of the reinforcing fibers, and the fiber weight of the prepreg is set so that they can be easily interlocked. 35g/m2 or less,
Impregnated resin amount 35-60wt%, prepreg thickness 0.0
5 mm, preferably 0.035 or more.

[0007] Furthermore, it is preferable that the degree of interlocking of the reinforcing fibers aligned in the circumferential direction at the overlapping portion of the prepreg is such that the thickness of the prepreg at the overlapping portion is as close as possible to the thickness of the prepreg; wall thickness is 50%
Form it so that it bites in and interlocks.

[0008] As the means for interlocking the overlapping portions of the circumferentially aligned reinforcing fibers, after winding the circumferential prepreg, the overlapping portions are heated at 40 to 80° C. for 3 to 10 minutes by rolling means.
The prepreg-impregnated resin is fluidized by heating and pressurizing at kg/cm2 for about 5 to 20 seconds, and one of the aligned reinforcing fibers is press-fitted between the other polymerized aligned reinforcing fibers.Then, the process is carried out according to conventional methods. A fishing rod is formed by taping and thermosetting.

[0009]

[Operation] The reinforcing fibers forming the inner and outer layers of the fishing rod in the overlapping part of the prepregs in which the direction of the reinforcing fibers is circumferential are joined in a state where they are interlocked with each other between the other reinforcing fibers. Therefore, the tensile shearing force in this part is increased to prevent delamination in the overlapping part and improve the strength of the fishing rod.

0010

[Example] An example of the present invention will be explained with reference to the drawings.
The fishing rod 1 includes an intermediate layer 2 formed by winding 2 plies of 0.14 mm thick prepreg (fiber basis weight 150 g/m2) impregnated with 30 to 38 wt% of epoxy resin, aligned in the axial direction of 7μ carbon reinforcing fibers, and Formed by winding 1 ply of 0.03mm thick prepreg (fiber basis weight 30g/m2) impregnated with 30-38wt% epoxy resin and aligned in the circumferential direction with 7μ carbon reinforcing fibers integrally provided on the inside and outside. The inner layer 3 and outer layer 4 have an inner diameter of 20 mm.

[0011] On both sides of the prepreg forming the inner layer 3 and outer layer 4, the carbon reinforcing fibers are polymerized over a length of 3500 μm, which is 500 times the fiber diameter, and the carbon reinforcing fibers 5 on one side and the other side are polymerized. Edge carbon reinforcement fiber 5
' are meshed and press-fitted with each other, and the thickness of each meshing and overlapping portion of the inner layer 3 and outer layer 4 is 0.04 mm.

The bending strength of the fishing rod thus constructed was 52.6 kg/mm2 in a four-point bending test, whereas the bending strength of the conventional fishing rod was 52.6 kg/mm2 in a four-point bending test.
The bending strength of the fishing rod according to the method shown in the figure is 45.4 kg.
/mm2.

[0013]

Effects of the Invention The present invention has an intermediate layer formed of prepreg in which the reinforcing fibers are aligned in the axial direction, and an inner and outer layer formed of prepreg in which the reinforcing fibers are aligned in the circumferential direction. In a fishing rod made of layers, both edges of the prepreg of the inner and outer layers are overlapped, and the aligned reinforcing fibers in the circumferential direction are interlocked and bonded between the aligned reinforcing fibers of the other layer, so that the aligned reinforcing fibers in the overlapping part are are tightly interlocked and press-fitted to improve the tensile shear strength and reliably prevent cracks and delamination phenomena that are conventional defects, significantly improving the strength of the fishing rod and reinforcing the circumferential direction accordingly. It has an excellent feature that it requires only a small amount of fiber, making it possible to make fishing rods lighter.

[Brief explanation of drawings]

FIG. 1 is an enlarged longitudinal sectional front view of the main parts of the fishing rod of the present invention.

FIG. 2 is a sectional view taken along the line A-A in FIG.

FIG. 3 is a longitudinal sectional front view of the fishing rod of the present invention.

FIG. 4 is a longitudinal sectional front view of the main part.

[Explanation of symbols]

1 Fishing rod 2 Middle class 3 Inner layer 4 Outer layer 5 Reinforcement fiber

Claims (2)

[Claims] Claim 1: An inner and outer layer is formed by winding prepreg in which the reinforcing fibers are aligned in the circumferential direction on the inner and outer sides of an intermediate layer formed by winding prepreg in which the reinforcing fibers are aligned in the axial direction. In the fishing rod constructed as above, both edges of the inner and outer prepregs are overlapped, and the aligned reinforcing fibers in the circumferential direction in the overlapped portion are interlocked with the aligned reinforcing fibers of the other side, so that the thickness of the overlapped portion is the same as that of the prepreg. A fishing rod characterized by being joined so that the thickness is approximately the same. 2. The method according to claim 1, wherein the length of the overlapping portion of the inner and outer prepregs is at least 100 times the diameter of the aligned reinforcing fibers, and the fiber weight of the inner and outer prepregs is set to 35 g/m2 or less. fishing rod.