JP2522022Y2 - Fishing rod - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing rod mainly used as an ayu rod or a mountain stream rod.

[0002]

2. Description of the Related Art Conventionally, sweetfish rods and mountain stream rods use carbon fibers having a high modulus of elasticity, for example, 40 t ₀ n / mm ² for weight reduction.
An axial layer that is aligned in the axial direction of the fishing rod, and a circumferential layer that is laminated on the inner and outer peripheries of the axial layer and has carbon fibers in the circumferential direction of the fishing rod, and is made thinner. Proposed.

Meanwhile, in the above as Ayusao and streams rod using carbon fiber, carbon fiber used in the circumferential layer, at 24t ₀ n / mm ² or 30t ₀ n / mm ² approximately modulus, tensile strength High carbon fiber is used.

[0004]

[Problem to be solved by the present invention]
In a fishing rod using high elastic modulus carbon fiber, there is also a limit in reducing the weight in relation to the fishing strength and the crushing strength, and it is possible to further reduce the weight while maintaining the fishing strength and the crushing strength exceeding a predetermined value. There was a problem that could not be done. Thus, in order to further reduce the weight, it is conceivable to use a carbon fiber having an ultra-high elastic modulus higher than that of a conventionally used high elastic modulus carbon fiber for the axial layer. However, simply using carbon fibers having an ultra-high elastic modulus for the axial direction layer and reducing the thickness by an amount corresponding to the increase in the elastic modulus does not provide the fishing strength required for a fishing rod.

[0005] In view of the above, according to the present invention, it was examined whether the fishing rod required for fishing rods could not be obtained simply by increasing the elastic modulus of the carbon fibers as described above. That's what I determined.

That is, when an axial layer is formed using carbon fibers having an ultra-high modulus of elasticity, the thickness thereof is reduced, and when the carbon fibers forming the circumferential layer are reinforced, carbon fibers having a high tensile strength are used. Even if it is used, the required fishing strength for a fishing rod cannot be obtained, and therefore, it is necessary to increase the amount of carbon fiber used for the circumferential layer, which hinders weight reduction. By making the elastic modulus of the carbon fiber to be formed a predetermined elastic modulus or more with respect to the elastic modulus of the carbon fiber used for the axial layer, the axial layer can be made thinner, and the amount of fibers in the circumferential layer can be increased. It has been found that the required fishing strength can be obtained without a fishing rod.

However, an object of the present invention is to make it possible to obtain the required strength at the time of catching a fish while reducing the weight more than the conventional product.

[0008]

According to the present invention, in order to achieve the above object, the ratio t / D of the fishing rod wall thickness t to the fishing rod inner diameter D is set to 0.03 or less by using carbon fibers having a high elastic modulus. In a thin fishing rod, an axial layer 1 formed by aligning carbon fibers in the axial direction of the fishing rod, and a circumferential layer laminated on the inner and outer circumferences of the axial layer 1 and using the carbon fibers in the circumferential direction of the fishing rod. 2, 3 and the total thickness of the circumferential layers 2 and 3 is made smaller than the thickness of the axial layer 1, and the elastic modulus of the carbon fibers in the axial layer 1 is set to an ultra-high elastic modulus. In addition, the elastic modulus of the carbon fibers in the circumferential layers 2 and 3 is 60% or more of the elastic modulus of the carbon fibers in the axial layer 1. In the present invention, the term "fishing rod" includes a single rod as well as a connecting rod or a drawing rod formed by joining a plurality of rod bodies, and a length adjustment used by adding to a rod bottom. Including poles. Further, in the present invention, the term "ultra high modulus", the elastic modulus refers to those modulus 55t ₀ n / mm ² approximately or more than the 40t ₀ n / mm ² about conventional products. The elastic modulus of the carbon fibers in the circumferential layers 2 and 3 is set to 60% or more of the elastic modulus of the carbon fibers in the axial layer 1. This is because when the thickness of the axial layer 1 is reduced using carbon fibers having an elastic modulus, the required fishing strength for the fishing rod cannot be obtained.

[0009]

Since the elastic modulus of the carbon fibers in the axial layer 1 is made to be an ultra-high elastic modulus, the thickness of the axial layer can be reduced so that the weight can be further reduced.
The elastic modulus of the carbon fiber in the above is 60% or more of the elastic modulus of the carbon fiber in the axial layer 1. Therefore, the thickness of the axial layer 1 can be reduced to make it lightweight, and sufficient reinforcement can be achieved. The required fishing strength can be obtained.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 and 2, reference numeral 1 denotes an axial layer formed by aligning carbon fibers in the axial direction of a fishing rod, winding a prepreg impregnated with a synthetic resin into two plies, and forming a hollow. A circumferential layer in which carbon fibers are aligned in the circumferential direction of the fishing rod, and a sheet-shaped alignment prepreg impregnated with a synthetic resin is laminated on the inner circumference over the entire length of the axial layer 1;
Similarly, reference numeral 3 denotes a circumferential layer in which carbon fibers are aligned in the circumferential direction of the fishing rod, and a sheet-shaped aligned prepreg impregnated with a synthetic resin is laminated on the entire outer circumference of the axial layer 1. The axial direction layer 1 uses a prepreg having a sheet thickness of 0.15 mm, and the circumferential direction layers 2 and 3 have a sheet thickness of 0.1 mm.
Using a 03 mm prepreg, these circumferential layers 2, 3
Is made smaller than the thickness of the axial layer 1. Then, as shown in FIG.
Is formed around the outer periphery of the core metal to form the circumferential layer 2, and the prepreg forming the axial layer 1 is wound around the outer periphery of the circumferential layer 2 to form the axial layer 1, A prepreg constituting the outer circumferential layer 3 is wound around the outer circumference of the axial layer 1 to form the circumferential layer 3 and molded in a usual manner. Further, as described above, the axial layer 1 and the circumferential layer 2,
The ratio t / D of the fishing rod wall thickness t to the fishing rod inner diameter D of the fishing rod formed by winding No. 3 is formed in a thin shape of 0.03 or less.

The carbon fiber used for the axial layer 1 has an ultra-high elastic modulus of 55 t ₀ n / mm ² or 60 t ₀ n / mm ² or more.
The carbon fibers used for the circumferential layers 2 and 3 have an elastic modulus of 60% or more of the elastic modulus of the carbon fibers in the axial layer 1. For example, axial layer 1
Preferably in the case of the 55t ₀ n / mm ² elastic modulus of carbon fibers, the elastic modulus of the carbon fibers for use in the circumferential direction layer 2,3 40t ₀ n / mm ² or more used for.

The reason why the elastic modulus of the carbon fibers in the circumferential layers 2 and 3 is set to 60% or more of the elastic modulus of the carbon fibers in the axial layer 1 is that the axial layer 1 has an ultra-high elastic modulus. This is because when the thickness of the axial layer 1 is reduced by using carbon fibers, the fishing strength required for the fishing rod can be obtained without increasing the fiber amount of the circumferential layers 2 and 3.

[0013] In this connection, the carbon fiber in the axial direction layer 1 and 55t ₀ n / mm ² of ultra-high modulus, the elastic modulus of the carbon fibers in the circumferential direction layers 2,3, 30t ₀ n / mm ² and 40t ₀
n / mm ² , the elasticity of the carbon fibers in the circumferential layers 2 and 3 is 55% of the elastic modulus of the carbon fibers in the axial layer 1, and the fishing strength is 73%. When the results were compared with the fishing strength, results as shown in Table 1 were obtained.

[0014]

[Table 1]

However, the fishing rod tested was a nine-piece splicing rod, and the tip and the intermediate rod from the tip to the fourth were ordinary ones. The fifth intermediate rod # 5 to the ninth original rod # For each of the rods 9, the rods described in Examples were used. Also,
In the table, 0 ° represents the axial layer 1, 90 ° represents the circumferential layer 2,
3 is represented.

As shown in FIG. 4, the method of the experiment is as follows. A base rod is pivotally supported by a fixed member, and a distal end is placed in a rod support cylinder A supported by a fluid pressure cylinder. A weight was hung on the tip of the tip of the tip of a fishing rod supported by inserting the rod end side, and the fishing strength when one of the rods # 5 to # 9 was broken was measured.

As apparent from the above data, when carbon fibers having an ultra-high elastic modulus are used for the axial layer 1, the elastic modulus of the carbon fibers in the circumferential layers 2 and 3 is determined by the carbon fiber in the axial layer 1. By making the modulus of elasticity of the fiber 60% or more, the weight of the fishing rod slightly increases as compared with a fishing rod made smaller than 60%. 60% fishing strength of fishing rod
It was possible to achieve higher fishing strength than a smaller fishing rod. Moreover, by using carbon fibers having an ultra-high modulus of elasticity for the axial layer 1, the amount of carbon fibers in the axial layer 1 can be reduced and the thickness of the axial layer 1 can be reduced, so that the weight can be further reduced. .

The fishing rod of the present invention is constructed as described above.
Since the axial layer 1 is made of ultra-high elastic carbon fiber having an elastic modulus as high as about 55 t ₀ n / mm ² , the thickness of the axial layer 1 is reduced by reducing the amount of carbon fibers in the axial layer 1. Since the elasticity of the carbon fibers in the circumferential layers 2 and 3 is 60% or more of the elastic modulus of the carbon fibers in the axial layer 1 while the weight of the fishing rod can be reduced, direction layer 1, when the elastic modulus using a carbon fiber of ultra-high modulus of 55t ₀ n / mm ^2, the circumferential layer 2,
3 uses a carbon fiber having a high elastic modulus of 40 t ₀ n / mm ² , without increasing the fiber amount of the circumferential layers 2 and 3 irrespective of the fact that the axial layer 1 can be made thin. Thus, the required fishing strength for the fishing rod can be obtained.

In the embodiment described above, each of the circumferential layers 2 and 3 is formed by winding a sheet-shaped prepreg. Alternatively, one of the circumferential layers 2 and 3 is formed by a sheet-shaped prepreg and the other is formed by a tape. May be formed over the entire length of the axial layer 1 by densely spirally winding the prepreg, or may be formed over the entire length of the axial layer 1 by tightly winding the tape-shaped prepreg. May be. For example, when the circumferential layer 2 is formed of a tape-shaped prepreg, as shown in FIG. 5, the tape-shaped prepreg is densely wound around the outer periphery of a cored bar to form a circumferential layer 2. And winding the sheet-shaped prepreg constituting the axial layer 1 to form the axial layer 1
Is formed on the outer periphery of the axial layer 1 and the outer circumferential layer 3
Is wound around to form the circumferential layer 3 and is formed in a conventional manner.

[0020]

As described above, according to the present invention, the ratio t of the fishing rod wall thickness t to the fishing rod inner diameter D using carbon fiber having a high elastic modulus is used.
In a thin-walled fishing rod having a / D of 0.03 or less, the elastic modulus of the carbon fibers in the axial layer 1 formed by aligning the carbon fibers in the axial direction of the fishing rod is made to be a very high elastic modulus. Therefore, the thickness of the axial layer 1 can be reduced by reducing the amount of carbon fibers in the axial layer 1 and the weight of the fishing rod can be reduced accordingly, and the elastic modulus of the carbon fibers in the circumferential layers 2 and 3 can be reduced by the axial layer. The elastic strength of the carbon fiber in the first embodiment is 60% or more, so that the fishing rod required for the fishing rod has a sufficient strength without increasing the amount of fibers in the circumferential layers 2 and 3 irrespective of the fact that the axial layer 1 can be made thinner. As a result, it is possible to form a fishing rod that is lighter than conventional products.

[Brief description of the drawings]

FIG. 1 is an enlarged longitudinal sectional front view of a part of a fishing rod according to the present invention.

FIG. 2 is a longitudinal sectional side view in which a part of the fishing rod is enlarged.

FIG. 3 is an explanatory view showing a method of forming a fishing rod.

FIG. 4 is an explanatory view showing a fishing test of a fishing rod.

FIG. 5 is an explanatory view showing another method of forming a fishing rod.

[Explanation of symbols]

 1 axial layer 2 circumferential layer 3 circumferential layer

Claims (1)

(57) [Scope of request for utility model registration] 1. A thin-walled fishing rod in which the ratio t / D of the thickness t of the fishing rod to the inner diameter D of the fishing rod is set to 0.03 or less using carbon fiber having a high elastic modulus, the carbon fibers are aligned in the axial direction of the fishing rod. And a plurality of circumferential layers 2 and 3 laminated on the inner and outer circumferences of the axial layer 1 and having carbon fibers in the circumferential direction of the fishing rod. The thickness is made smaller than the thickness of the axial layer 1, the elastic modulus of the carbon fibers in the axial layer 1 is made to be a very high elastic modulus, and the elastic modulus of the carbon fibers in the circumferential layers 2 and 3 is Is set to be 60% or more of the elastic modulus of the carbon fiber in the axial layer 1.