JPH0469054B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for manufacturing a fishing rod, and more specifically, a hollow fishing rod made by winding a prepreg made of high-strength fiber impregnated with a synthetic resin into a tubular shape and firing it under pressure. The present invention relates to a method of manufacturing a fishing rod in which a main body is provided with a bulging portion having a tapered portion whose diameter increases at a rate of change greater than the rate of change of the diameter of the rod body.

(Prior Art) Conventionally, for example, as a method for manufacturing a fishing rod, the proximal end of the rod body is provided with a bulge having a tapered part whose diameter increases at a rate of change greater than the rate of change in the diameter of the proximal end. A prepreg made by impregnating an aligned sheet of high-strength fibers such as carbon fibers and glass fibers with synthetic resin is wrapped around a core metal to form a hollow rod body, and then paper is wrapped around the outer periphery of the proximal end of the rod body. A method is known in which a core material such as cotton is wound with a string-like body such as thread or tape and raised in a tapered shape to form a bulge of a size that is easy to grip.

(Problems to be Solved by the Invention) However, according to this conventional manufacturing method, since the core material remains on the outer periphery of the rod body, there is a problem that the weight of the entire rod increases. In addition, if the core material remains as described above, for example, when fishing by holding the bulge, the hit when the fish bites the bait is transmitted to the hand through the core material, so that one part of the hit is transmitted to the hand through the core material. The fishing rod is absorbed by the core material, resulting in poor fishing response and a delay in the timing of pulling in the fishing line, resulting in poor fishing results.

An object of the present invention is to solve the problem in the prior art in which the core material remains on the outer periphery of the rod body.

(Means for Solving the Problems) Accordingly, the present invention provides a hollow rod body made by winding a prepreg made of high-strength fibers impregnated with a synthetic resin into a tubular shape and firing it under pressure. A method for manufacturing a fishing rod provided with a bulge having a tapered part whose diameter expands at a rate of change greater than the rate of change, wherein the core material for forming the bulge is removably superimposed on the outer periphery of the core metal for forming the rod body. After wrapping the prepreg around the core metal and the outer circumferential surface of the core material and firing under pressure, the core metal is extracted, and the core material is removed from the rear side opening of the bulge formed by this extraction. It is characterized in that the rod body and the bulging portion are molded integrally by taking out the rod.

(Function) Therefore, in the present invention, after pressure firing,
By removing the core metal and removing the core material for forming the bulge from the rear opening of the bulge formed by this extraction, it is possible to manufacture a fishing rod with a bulge in which no core material remains. .

(Example) An example of the method for manufacturing a fishing rod of the present invention will be described below based on the drawings.

In the figure, reference numeral 1 denotes a core metal for forming a rod body, which has a molded part of a size corresponding to the inner diameter of a hollow rod body that is inclined in a tapered manner. A core material 3 for forming a bulge in a sheet shape having a length that can be wound multiple times is removably wound in multiple layers and overlapped, and the diameter is expanded at a rate of change greater than the rate of change in the diameter of the core metal 1. This forms a tapered raised portion.

In addition, if a step is formed between the edges of the outer peripheral surface of the core material 3 wrapped multiple times around the core metal 1, the step portion is filled with a suitable repair material mainly in the form of putty to eliminate the step portion. The outer peripheral surface of the core material 3 is shaped into a smooth curved surface.

Further, the core material 3 may be made of a woven fabric such as a cotton cloth or a synthetic fiber cloth, or may be a plate such as a synthetic resin plate, and the material thereof is not particularly limited.

After that, carbon fiber,
After wrapping a prepreg formed into a sheet by impregnating an aligned sheet of high-strength glass fiber with a synthetic resin several times, cellophane tape (not shown) is spirally wrapped around the outer circumference of the wrapped prepreg. The wrapping prepreg is wrapped and bound, and the wrapping prepreg is pressurized by the binding, and in this pressurized state, it is heated in a heating furnace, and by this heating, the synthetic resin in the wrapping prepreg is once softened, and then hardened. .

The prepreg may be formed by impregnating an alignment sheet with a synthetic resin or by impregnating a woven sheet made of the same material as the alignment sheet with a synthetic resin. Further, as the synthetic resin for the prepreg, thermosetting synthetic resins such as phenol resin, epoxy resin, and polyester resin may be used, and thermoplastic synthetic resins may also be used.

After the pressure firing, the core metal 1 is pulled out in the direction of the arrow in FIG.

A dismantling tool is inserted into the opening 4 formed at the overlapping part of the core material 3 by removing the core metal 1, and the core material 3 is dismantled from the end where the core material 3 starts to overlap. The core material 3 is taken out from the opening 4, and the rod body 2 and the bulging portion 5 are integrally molded.

Note that, for example, a shrink tube coated with a mold release agent on the outer surface may be fitted around the outer periphery of the core material 3 wound around the core metal 1, and the shrink tube may be shrunk.
Alternatively, a cellophane tape with a release agent is wound spirally to prevent the synthetic resin of the wrapped prepreg, which is once softened, from sticking to the stacked core material 3 during firing of the wrapped prepreg. However, it is not necessary to use the shrink tube and cellophane tape. In this case, for example, a mold release agent is applied to the outer periphery of the stacked core materials 3. However, by using the shrink tube or the cellophane tape, there is an advantage that the core material 3 superimposed on the core bar 1 can be temporarily fixed to the core bar 1. In addition, when the shrink tube or cellophane tape is used, the shrink tube or cellophane tape is taken out together with the core material 3 after the rod body 2 and the bulging portion 5 are formed. It may be left inside the bulge 5.

In the above embodiments, the core material 3 for forming the bulge portion was formed into a sheet shape, but it may also be formed into a string shape as shown in FIG. 5, or into a narrow tape shape. . When forming it into a thread, a thread made of cotton or synthetic fiber with a mold release agent is used, and the core bar 1 is removably wrapped in multiple layers and overlapped, and the rate of change in the diameter of the core bar 1 is greater than the rate of change in the diameter of the core bar 1. This forms a tapered bulge that expands in diameter at a rate of change. Further, the outer surface of the stacked core materials 3 is formed with a smooth curved surface as in the above-mentioned embodiment, and if necessary, a shrink tube coated with a mold release agent or a mold release agent is used. The attached cellophane tape is wound spirally.

(Effects of the Invention) As described above, the present invention has the core material for forming the bulge portion removably superimposed on the outer periphery of the core metal for forming the rod body,
After winding the prepreg around the core metal and the outer peripheral surface of the core material and firing under pressure, the core metal is extracted, and the core material is taken out from the rear side opening of the bulge formed by this extraction. Since the rod body and the bulge are integrally molded so that no core material remains, the overall weight of the fishing rod can be made lighter compared to conventional fishing rods in which the core material for forming the bulge remains. It can be done. In addition, since the core material does not remain, for example, when fishing by holding the bulge, the hit when the fish bites the bait is directly transmitted to the hand, so the reaction to the hit is extremely good, and the timing for pulling in the fishing line is very good. You can expect good fishing results without any delays.

[Brief explanation of drawings]

Fig. 1 is a partially omitted sectional view of a fishing rod formed by the manufacturing method of the present invention, and Fig. 2 is a part of the core metal for forming the rod body and the core material for forming the bulge used in the manufacturing method of the present invention. FIG. 3 is an explanatory diagram during pressure firing, FIG. 4 is an explanatory diagram of the state in which the core metal for forming the rod body is removed after pressure firing, and FIG. 5 is according to another embodiment. FIG. 6 is an explanatory diagram showing the state in which the core metal for forming the rod body is removed after pressure firing according to another embodiment. 1... Core metal for forming the rod body, 2... Rod body, 3... Core material for forming the bulge, 5... The bulge.

Claims (1)

[Claims] 1 A hollow rod body made by winding a prepreg made of high-strength fibers impregnated with synthetic resin into a tubular shape and firing under pressure. A method for manufacturing a fishing rod with a protruding portion, wherein a core material for forming a protruding portion is removably superimposed on the outer periphery of a core metal for forming a rod body, and the prepreg is applied to the outer peripheral surface of the core metal and the core material. After winding and firing under pressure, the core metal is extracted, and the core material is taken out from the rear opening of the bulge formed by this extraction, and the rod body and the bulge are integrally molded. A fishing rod manufacturing method characterized by: