JPH0321334B2 - - Google Patents

Description

[Detailed description of the invention]

OBJECTS OF THE INVENTION The present invention aims to prevent bending and improve the strength of tubular bodies such as fishing rods. Prior Art A method of winding a high-strength fiber impregnated with a thermosetting resin between the inner and outer layers of a tubular body such as a fishing rod formed by winding a prepreg sheet was disclosed in Japanese Patent Application Laid-Open No. 1983-1999.
It is known from Publication No. 134684. However, in a product wound with fibers like this, the strength of the part reinforced with fibers and the part that is not reinforced is significantly different, so stress is concentrated at the boundary between the parts reinforced with fibers, and it is especially difficult to bend. When it is large, there is a defect that breaks from this part. It is also known from Japanese Patent Laid-Open No. 48-20878 to interpose a steel wire wound in the middle layer of a tubular body such as a fishing rod, but this method uses a flexible material such as plastic or rubber as the core material. In addition, the outer layer of the steel wire is formed by winding it into a tape strip, so the axial rigidity and flexural strength are weak, and the overlapping portion of the tape inhibits flexibility. There is a flaw. Problems to be Solved by the Invention Appearance defects such as twists, bends, and undulations in tubular bodies such as fishing rods can be checked by visual inspection of the product, but they are caused by twists, bends, etc. of reinforcing fibers that form the tubular body. Breakage of the tubular body cannot be predicted. The present invention utilizes the characteristics of single fiber strips of amorphous alloy to prevent bending, twisting, and waviness of reinforcing fibers, thereby preventing their breakage. Structure of the Invention In order to achieve the above object, the present invention has a tubular body formed from an inner layer and an outer layer by winding a prepreg sheet. The purpose of this is to encourage people. Embodiment To explain an embodiment of the present invention with reference to the drawings, a single fiber strip 4 made of an amorphous alloy is spirally or twilled between the inner and outer layers of a tubular body 3 formed from an inner layer 1 and an outer layer 2 by winding a prepreg sheet. The winding is interposed integrally in a shape. As is well known, the prepreg sheet is formed by impregnating a thermosetting synthetic resin into an aligned sheet or woven fabric of reinforcing fibers such as glass fibers or carbon fibers. After winding to form the inner layer 1, a monofilament strip 4 of amorphous alloy is wound on top of the inner layer 1, and then a prepreg sheet is further wound one or more times on the top to form the outer layer 2. Therefore, the single fiber strip 4 of the amorphous alloy, the inner layer 1, and the outer layer 2 are integrated by taping and thermosetting to form a tubular body 3.
That is. The properties of the amorphous amorphous alloy are as follows, and an example of its composition is Fe (75-80%) Si (5-80%).
10%) B (10 to 20%) is wound into a spiral or twilled shape.

[Table] Effects of the Invention The present invention uses a single fiber strip of amorphous amorphous alloy with high tensile strength, thinness, and high elongation to be integrally wound between the inner and outer layers of the prepreg constituting the tubular body. The bending load is shared by following the bending of the tubular body, improving the reinforcing effect of the tubular body and not inhibiting the bending of the tubular body. In addition, even when the impregnated synthetic resin of the prepreg sheet fluidizes during the heat-curing process of the tubular body, the amorphous alloy single fiber strip hardens without moving, so it is possible to wind up a conventional high-strength reinforcing fiber strip impregnated with synthetic resin. It can prevent bending, twisting, and waviness of the reinforcing fibers that form the prepreg sheet, as in the case of prepreg sheets, and since the amorphous alloy fibers are thin, the outer surface of the outer layer is smooth, eliminating air bubbles during surface polishing and painting. It has excellent features such as being able to prevent the occurrence of paint and build-up of paint, making it easy to attach parts such as guides, and making it easy to measure the mating parts smoothly.

[Brief explanation of the drawing]

The drawing is a partially cutaway front view of the present invention. 1...Inner layer, 2...Outer layer, 3...Tubular body, 4...
...Amorphous amorphous alloy single fiber strip.

Claims (1)

[Claims] 1. A tubular body, such as a fishing rod, in which a monofilament of amorphous alloy is wound in a spiral or twill pattern between the inner and outer layers of a tubular body formed by winding a prepreg sheet into an inner layer and an outer layer.