JPS5849103Y2 - fishing rod - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a fishing rod formed by winding one ply of prepreg.

Conventional fishing rods are generally manufactured by using thin (thinner than 0.1%) prepreg, winding multiple plies of the prepreg on a mandrel, and heating and curing the prepreg. Instead of uniformly winding multiple plies on top, it has also been proposed to use a thick prepreg with a thickness of 0.1%, for example, and wind one ply of this prepreg.

Specifically, tungsten-cored boron fibers with extremely high hardness and flexural modulus have recently been developed and offered as materials for prepregs, but these boron fibers have a smaller diameter than the carbon and glass fibers that have been widely used in the past. It is very large and has a wall thickness of a dog when made into a prepreg. Therefore, when a prepreg made of boron fiber is wound in multiple plies to make a fishing rod, the wall thickness of the fishing rod becomes a dog.

In this case, there is no problem as a fishing rod with a hard tone such as a rock rod, but the rigidity becomes too large and is inappropriate as a fishing rod with a soft tone such as a spatula rod, a sweetfish rod, or a slow-flow rod.

Therefore, when making this kind of soft fishing rod with a thin wall using the boron fiber, the fishing rod is made by winding one ply of prepreg.

However, when a fishing rod is formed by winding one ply of prepreg, both ends of the wrapped prepreg are overlapped on a mandrel, and the overlapping parts are bonded and integrated. The thickness of the part becomes uneven, and when the prepreg is heated and cured, the thermal expansion of the polymerized part differs from that of other parts, which causes the fishing rod to warp and bend into a mountain shape with the weight part on top. There is a big problem.

The present invention was devised in view of the various problems mentioned above, and aims to provide a good fishing rod that does not warp even though it is formed by winding one ply of prepreg.

More specifically, it is a fishing rod in which one ply of prepreg of a required thickness is wound and the wound ends are overlapped and bonded, and the amount of overlap of the wound ends is at a position symmetrical to the overlapping part of the wound ends. This is characterized by fixing narrow prepregs having the same width and thickness.

The fishing rod of the present invention will be explained below with reference to embodiments of the drawings.

In the figure, 1 is a hollow cylindrical fishing rod body, in which one ply of prepreg 2 made of boron fiber or the like is wound to a required thickness, both ends 2a and 2b of the winding are overlapped, and the overlapped part 3 is joined. Formed by integrating.

Therefore, on the outer circumference of the main body 1, at a position symmetrical to the overlapping part 3, the overlapping amount of the prepreg winding ends 2a, 2b in the overlapping part 3, that is, the overlapping amount of the main body 1
A homogeneous narrow prepreg 4 having a width and thickness corresponding to that of the main body 1 is integrally fixed over the entire length of the main body 1 to a portion projecting outward from the surface of the main body 1.

In addition, a narrow reinforcing material 5 made of cloth or yarn such as glass, carbon, and Kevlar fibers is wound spirally around the inner circumferential surface of the main body 1 to provide strength in the crushing direction (pressure resistance) of the main body 1. This is to compensate for the crushing strength).

The fishing rod body 1 uses a prepreg 2 cut into a generally trapezoidal shape as shown in FIG. It is formed by rotating it so that it becomes .

By doing so, each fiber of the prepreg 2 can be aligned parallel to the longitudinal center line of the main body 1, thereby increasing the bending strength of the fishing rod.

The fishing rod is manufactured as follows.

That is, as shown in FIG. 3, first, the reinforcing material 5 is spirally wound around the outer periphery of a tapered mandrel M, and only one ply of the prepreg 2 is wound around the outer periphery of this reinforcing material 5.
Both winding ends 2a and 2b are overlapped with each other.

Next, at the outer periphery of the prepreg 2, the overlapping portion 3
A narrow prepreg 4 having a width and thickness equal to the overlapping amount of the overlapping portion 3 is attached at a symmetrical position with respect to the overlapping portion 3.

After that, the outer periphery of the main body 1 is bound with cellophane tape 6 or the like, and the overlapping parts 3 are integrated with each other by heating and hardening in a firing furnace or the like, and the prepreg 4 is integrated with the main body 1. After this hardening, it is pulled out from the mandrel M to form a fishing rod.

When heating and curing the fishing rod body 1 as described above, the outer periphery of the main body 1 is provided with overlapping portions 3 at both ends of the prepreg 2, and narrow prepreg 4 corresponding to the overlapping portions 3 at positions symmetrical thereto. Therefore, the overlapping portion 3 and the prepreg 4 do not interfere with each other and cause warping or the like.

As explained above, in the fishing rod of the present invention, one ply of prepreg of the required thickness is wound, the ends of the winding are overlapped and bonded, and the overlapping amount of the end of the winding is placed at a symmetrical position of this overlapping part. Since the narrow prepreg having the same width and thickness is fixed, a good fishing rod can be obtained without warping when the prepreg is heated and hardened. A warp-free fishing rod can be obtained by winding a single ply of prepreg without having to wind multiple plies of prepreg. Therefore, a fishing rod can be manufactured extremely easily and in a short time without requiring any skill. can be provided at low cost.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a fishing rod according to the present invention, FIG. 2 is a plan view of a prepreg, and FIG. 3 is a sectional view showing a part of the manufacturing process of the fishing rod. 2... Prepreg, 2a, 2b... Winding end, 3
...Overlapping part, 4...Narrow width prepreg.

Claims (1)

[Scope of utility model registration request] A fishing rod in which one ply of prepreg of a required thickness is wound and the wound ends are overlapped and bonded, and the amount of overlap of the wound ends is symmetrical to the overlapping part of the wound ends. A fishing rod characterized by fixing narrow prepreg having equal width and thickness.