JPH037334B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fishing rod suitable for sweetfish fishing, etc., where lightness is important.

In general, fishing rods are made by wrapping prepreg, which is a sheet of high-strength fiber such as carbon fiber or glass fiber impregnated with synthetic resin, around a core metal several times in the direction of alignment, and then heating and forming it into a tubular shape. are doing.

By the way, the strength of a fishing rod is greatly affected by the amount of synthetic resin impregnated in the prepreg, but generally the amount of synthetic resin impregnated is 35 to 35%.
When the amount is 40 wt% and the rest is the above-mentioned fiber, the most preferable strength can be obtained.

Therefore, conventional fishing rods are made of synthetic resin with a weight of 35 to 40wt.
% impregnated prepreg is used.

However, in the case of fishing rods where lightness is important, such as fishing rods for sweetfish, using prepreg impregnated with 35 to 40 wt% of synthetic resin makes it possible to reduce the weight per unit volume to below a specified value. I couldn't do it, and it was too heavy for me. Furthermore, when using a prepreg in which the amount of synthetic resin impregnated is smaller than the most preferable case, there is a problem that the strength per unit weight cannot be maintained at a predetermined value or more, and the prepreg is likely to break.

For this reason, in fishing rods for which lightness is already considered important, the amount of synthetic resin impregnated in the prepreg is reduced to a small amount, for example, 30 wt% or less, to reduce the weight per unit area of the prepreg, and the prepreg is wound. It has been proposed that the following reinforcing means is applied to the rotary molded rod body to increase its strength. One is the so-called CG, which is made of aligned carbon fibers lined with glass cloth woven as thin as 0.03mm.
The cloth is wrapped around the outer surface of the rod body so that the carbon fibers of the CG cloth face in the circumferential direction, but in order to obtain sufficient strength, it is necessary to wrap the cloth in multiple layers, making it heavy. It was hot.
Another method is to arrange a particularly thin carbon fiber alignment sheet on the rod body so that the carbon fibers of the sheet face in the circumferential direction, but originally this type of sheet was When manufacturing a thin sheet with a wide width, for example, 1 m or more, the amount of synthetic resin impregnated must be adjusted to ensure that there is no shortage of impregnated synthetic resin in any part of the entire sheet. Since it is slightly larger than 0.08 mm, it is difficult to make a product thinner than 0.08 mm. Therefore, the overall weight cannot be reduced below a predetermined value, resulting in a heavy weight. Furthermore, other methods that have been proposed include adding a small amount of synthetic resin to a carbon fiber aligned sheet, such as
Forming a narrow tape impregnated with 30wt% or less,
The tape is wound around the outside or inside surface of the rod body, but when repeated bending loads are applied, surface cracks may occur on the inside or outside surface of the rod body where the tape is not wrapped. It was hot.

The purpose of the present invention is to reduce the impregnated amount of synthetic resin to 35wt in the rod body, which is formed by wrapping prepreg impregnated with synthetic resin around a high-strength fiber aligned sheet.
%, the weight of the rod body can be reduced, and the wall thickness of the rod body can be made uniform to stabilize the tensile strength and weight. A sheet of high-strength fiber is impregnated with a synthetic resin with a small mesh size, and wrapped with a narrow tape of 0.08 mm or less in thickness, which distributes and reinforces the bending load on the rod body, making it lightweight. The object of the present invention is to provide a fishing rod that can maintain sufficient strength while retaining the same properties.

The structure of the present invention is a fishing rod in which the rod body is formed by wrapping a prepreg impregnated with a synthetic resin around an aligned sheet of high-strength fibers, in which the impregnated amount of the synthetic resin in the prepreg is made smaller than 35 wt%, and A thin tape with a thickness of 0.08 mm or less is formed by impregnating an aligned sheet of high-quality fibers with a synthetic resin, and the narrow tape is wrapped around the inner and outer surfaces of the rod body. and a winding layer provided on the outer surface to share and reinforce against the bending load on the rod body, which can sufficiently reduce the weight per strength against the bending load. It is.

Hereinafter, embodiments of the fishing rod of the present invention will be described based on the drawings.

The present invention basically consists of a prepreg 1 in which an aligned sheet of high-strength fibers 11 is impregnated with a synthetic resin 12.
In a fishing rod in which the rod body A is formed by wrapping
The amount of impregnation of the synthetic resin 12 in the prepreg 1 is made smaller than 35 wt%, and the aligned sheet of high-strength fibers 21 is impregnated with the synthetic resin 22,
A narrow tape 2 with a thickness of 0.08 mm or less is formed, and the narrow tape 2 is wrapped around the inner and outer surfaces of the rod body A, and the inner and outer surfaces are made to withstand bending loads on the rod body A. Winding layers B and C that share reinforcement and countermeasures
We will set up the following.

In what is shown in the drawings, the prepreg 1 includes:
As the high-strength fiber 11, carbon fiber having light and high-strength characteristics is used, and the synthetic resin 12
The impregnated amount is set to a value smaller than 35wt% so that the weight per unit volume is smaller than a predetermined value, and if the diameter and number of carbon fibers used are the same as the conventional one, the rod Body A
In this case, the bending strength decreases in proportion to the amount of impregnated synthetic resin 12, but the weight decreases accordingly.

Further, the narrow tape 2 has the high-strength fiber 2
1, using carbon fibers with a smaller diameter than the carbon fibers used in the prepreg 1 and a tensile strength of 300 kg or more, for example, 3000 carbon fibers are arranged in a narrow shape with a width of 0.5 mm to 10 mm, And the amount of synthetic resin impregnated is small, for example 20 to 33wt.
%, and the thickness is within the range of 0.01 to 0.05 mm, and this narrow tape 2
As described above, the width dimension is extremely small, so even if the amount of synthetic resin impregnated is reduced, there will be no areas where synthetic resin is insufficient throughout.
In addition, the required minimum amount of synthetic resin is uniformly soaked without creating any areas where the synthetic resin becomes excessively large, and the thickness can be reduced to 0.08 mm or less.

When this narrow tape 2 is wound around the inner and outer surfaces of the rod body A to form the wound layers B and C, especially when making it lightweight, it is threaded so that it does not overlap. It is wound more roughly towards the distal end where a small bending load is applied to reinforce it to the minimum required strength, and more densely towards the proximal end where a large bending load is applied. However, it is not limited to the above winding state,
It may be wound in a polymeric manner or at any desired winding pitch. Further, the narrow tape 2 is made to bite into the rod body A before heating and hardening it, without protruding from both the inner and outer surfaces, but it is not necessarily necessary to bite into it.

The present invention is constructed as described above. After the narrow tape 2 is wound around the core metal 3 in a spiral manner as shown in FIG. 5A, the prepreg 1 is wrapped around the outer circumference several times as shown in FIG. At the same time, a narrow tape 2 is wound around the outer surface of the rod body A in a spiral pattern as shown in FIG. Attach and bind, heat and bake in a heating furnace to harden the synthetic resin in the rod body A and the narrow tapes 2, 2 on both inner and outer surfaces thereof,
After that, the core is removed, cellophane tape is removed, polished, and painted as usual.

Therefore, in the fishing rod manufactured as described above, the amount of impregnation of the synthetic resin 12 in the prepreg 1 is 35 wt%.
In order to make it smaller, the amount of impregnation of the synthetic resin was reduced to 35
Although the tensile strength per unit weight is lower than that of a general fishing rod with ~40wt%, on the other hand,
Since the weight per unit volume can be significantly reduced,
It can be made very light, and it is less likely that the synthetic resin will be insufficient or excessive, making it possible to equalize the wall thickness of the rod body A, thereby stabilizing the tensile strength and weight. This makes it possible to form fishing rods with small variations in tensile strength and weight.

Moreover, a wound layer B, such that the high-strength fibers 21 of the narrow tape 2 are wound in the circumferential direction on the inner and outer surfaces of the rod body A formed of the prepreg 1,
Since C is provided, against the bending load on the rod body A,
On both the inner and outer surfaces of the rod body A, these winding layers B and C will be responsible for reinforcing each other, and each winding layer B and C will have a narrow width and an extremely thin wall of 0.08 mm or less. Since the amount of synthetic resin impregnated is small, it is extremely lightweight.
Furthermore, by winding it in a spiral shape, it can be made even lighter.In the end, the winding layers B and C can suppress the increase in weight to a minimum while ensuring that both the inner and outer surfaces of the rod body A are protected. This can prevent cracks from occurring on the inner and outer surfaces of the rod body A. Unfortunately, if the rod body A is made of prepreg with a synthetic resin impregnation amount of 25 wt%, the fishing rod will have the same or slightly stronger fishing potential than a conventional fishing rod whose rod body is made of prepreg with a synthetic resin impregnation amount of 35 to 40 wt%. It is possible to obtain strength (strength against bending and torsion loads during fishing), and also to reduce the weight of the entire fishing rod by approximately 20%, making it lighter overall.

In the above description, it is assumed that the narrow tapes 2 wound around the inner and outer surfaces of the rod body A have the same specifications, but it goes without saying that tapes with different specifications can be used.

As described above, in the present invention, the amount of synthetic resin impregnated is 35 to 35%.
The rod body is formed from prepreg with a content of 40wt%,
In contrast to conventional fishing rods that maintain strength per unit weight above a predetermined value, the rod body is formed from prepreg with a synthetic resin impregnated amount of less than 35wt%, and the unit volume of the rod body is increased. In addition to reducing the weight of the rod, the inner and outer surfaces of the rod body are made of a narrow tape with a thickness of 0.08 mm or less, and a wound layer is added to reinforce and share the bending load on the rod body. The tape is provided to reinforce the inner and outer surfaces of the rod body, thereby preventing cracks from occurring on the inner and outer surfaces of the rod body, and minimizing the increase in weight due to the narrow tape. Therefore, the weight per unit volume of the rod body can be reduced, making it lightweight, and the prepreg is less likely to have insufficient or excessive synthetic resin, making the wall thickness of the rod body uniform. As a result, the tensile strength and weight can be stabilized, and a fishing rod with small variations in tensile strength and weight can be formed.Moreover, the inner and outer surfaces of the rod body can be reinforced by each of the winding layers. Since it is possible to compensate for the decrease in strength due to the reduction in the amount of synthetic resin impregnated in the prepreg, the increase in weight due to the narrow tape can be minimized, and a lightweight, high-strength fishing rod can be formed. be.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing an embodiment of the fishing rod of the present invention, Fig. 2 is a partially enlarged sectional view, Fig. 3 is a perspective view of a prepreg, Fig. 4 is a partially enlarged perspective view of a narrow tape, FIGS. 5A, 5B, 5C, and 5D are explanatory diagrams showing an example of the manufacturing method. 1... Prepreg, 11... High strength fiber, 12
... Synthetic resin, 2 ... Narrow tape, 21 ... High strength fiber, 22 ... Synthetic resin, A ... Rod body, B,
C...Wound layer.

Claims (1)

[Claims] 1. In a fishing rod in which the rod body is formed by wrapping a prepreg impregnated with a synthetic resin around an aligned sheet of high-strength fibers, the impregnation amount of the synthetic resin in the prepreg is made smaller than 35 wt%, and the amount of impregnation of the high-strength fibers is The uniform sheet is impregnated with synthetic resin to increase the thickness.
A narrow tape having a width of 0.08 mm or less is formed, and the narrow tape is wrapped around the inner and outer surfaces of the rod body, so that the inner and outer surfaces of the rod body share the bending load on the rod body. A fishing rod characterized by being provided with a winding layer for reinforcement.