JPS6342495B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method of manufacturing a fishing rod.

Previously, the applicant of the present invention has integrally coupled to the base end of a tapered hollow rod body a grip 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. I proposed a fishing rod made of

However, when manufacturing fishing rods with levers, a core metal with a molded part of a size corresponding to the inner diameter of the rod body and the grip part is provided, and a sheet of high-strength fiber is impregnated with synthetic resin in the core metal. After winding the wrapped prepreg, a cellophane tape is spirally wound around the outer periphery of the wrapped prepreg and bound, pressure is applied by the binding, and the cellophane tape is peeled off by heating and baking in a heating furnace. Manufactured by.

However, in the case of this conventional manufacturing method, the angle difference between the taper angle of the rod body and the taper angle of the taper part in the grip is too large, so when the prepreg is wound around the core metal, the proximal end of the rod body There is a problem in that wrinkles occur at the connecting portion between the grip portion and the grip portion, creating a gap between the wrapped prepregs, resulting in a decrease in strength.

By the way, as a manufacturing method to prevent the formation of wrinkles,
A core metal for molding the rod body and a core metal for molding the grip part are provided, and prepreg for forming the rod body is wound around the core metal for molding the rod body, and after the rod body is preformed by heating under pressure, the grip part is formed. It is conceivable to manufacture the forming prepreg by winding it around the grip-forming core metal so that one end of the prepreg overlaps with the base end outer circumference of the rod main body, and firing under pressure.

However, in this manufacturing method, because the diameter difference between the outer diameter of the base end of the rod body and the outer diameter of the core metal for forming the grip is very large, the prepreg for forming the grip is prepared by cutting one end of the prepreg in advance. When the rod body and the core for forming the grip portion are simultaneously rotated and wound together with the outer peripheral portion of the base end of the formed rod body, the rotational speed of the base end portion of the rod body and the core for forming the grip portion due to the diameter difference are determined. There is a large speed difference between the rotational speed of the metal and this speed difference causes the rod body to slip in the circumferential direction against the core metal for forming the grip.
The position of the rod body relative to the core metal for forming the grip part shifts in the circumferential direction, and this positional shift causes the prepreg to be twisted during winding.As a result, when pressure firing is performed in this twisted state, the rod This results in a fishing rod in which the main body is bent relative to the grip, and the strength of the connection between the rod main body and the grip is also reduced.

The present invention was invented in view of the above points, and an object thereof is to make the pre-formed rod body non-rotatable relative to the core metal for forming the grip, and to wind the prepreg for forming the grip around the core metal. This is to prevent the prepreg from being twisted during winding.

Accordingly, the configuration of the present invention provides a fishing rod in which a handle 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 is coupled to the base end of a hollow rod body that is inclined in a tapered manner. The manufacturing method includes providing a core metal for forming a grip portion with a fitting body at one end, forming a rotation stopper around the outer periphery of the fitting body of the core metal, and applying a synthetic resin to a sheet of high-strength fiber to the fitting body. The prepreg impregnated with synthetic resin is wound, and the base end of the rod body, which has been preformed by pressure firing, is fitted so as to be non-rotatable. It is wound around the core metal so that one end overlaps with the outer circumference of the proximal end of the rod body, and the grip is integrally joined to the rod body by pressure firing, and the rod body is bent relative to the grip. This made it possible to prevent this.

Examples of the manufacturing method of the present invention will be described below based on the drawings.

In the figure, 1 has a molded part 11 of a size corresponding to the inner diameter of the hollow rod body 2 which is inclined in a tapered manner,
A rotation preventing strip 12 is provided on the outer periphery of one end of this molded portion 11.
3 is a core metal for molding the rod body having a rotation prevention means, and 3 is a prepreg formed into a sheet shape by impregnating a sheet of high-strength fiber such as carbon fiber or glass fiber with a synthetic resin, This prepreg 3 is wound several times around the outer periphery of the core metal 1 for forming the rod body, and after a part of the prepreg is bitten into the rotation stopper 12 portion of the core metal 1, the outer periphery of the wrapped prepreg is Cellophane tape (not shown) is spirally wound and bound, the wrapped prepreg is pressurized by this binding, and heated in a heating furnace in this pressurized state,
This heating hardens the synthetic resin in the wrapped prepreg, and then the core bar 1 is removed and the cellophane tape is peeled off to form a rotation stopper strip 21 on the inner periphery of the proximal end as shown in FIG. This forms a rod body 2 having a stop means.

Next, a molded part 51 having a size corresponding to the inner diameter of the grip part 4 having a tapered part 41 whose diameter expands at a rate of change greater than the rate of change of the diameter of the rod body 2 is provided, and one end of this molded part 51 is provided with the above-mentioned molded part 51. A grip-forming core 5 is provided with a fitting body 52 having a smaller diameter than the outer diameter of the base end of the rod body 2, and a rotation preventing means such as a rotation preventing strip 53 is formed on the outer periphery of the fitting body 52 of the core metal 5. Then, the fourth
As shown in the figure, after the pre-formed anti-rotation strip 21 on the inner periphery of the proximal end of the rod body 2 is fitted to this fitted body 52 in a manner that prevents relative rotation, a sheet of high-strength fiber is impregnated with synthetic resin. A grip portion forming prepreg 6 formed in a sheet shape is applied to the grip portion forming core bar 5 so that one end of the prepreg 6 overlaps with the outer peripheral portion of the proximal end of the rod body 2, and then the rod is While simultaneously rotating the main body 2 and the core metal 5 for forming the grip, the prepreg 6 for forming the grip is attached to the rod main body 2.
It is wound around the outer periphery of the proximal end of the grip part forming core metal 5.

However, when the prepreg 6 for forming the grip portion of the lever is wound, the preformed rod body 2 is fitted to the core metal 5 for forming the grip portion so that relative rotation is not possible. Even if a large speed difference occurs between the rotational speed of the base end of the rod body and the rotational speed of the core metal 5 due to the difference in outer diameter between the rod body 2 and the core metal 5, The prepreg 6 can be wound, and therefore, the prepreg 6 can be reliably prevented from being twisted and wound.

After winding the grip portion forming prepreg 6 as described above, a cellophane tape (not shown) is spirally wrapped around the outer periphery of the wrapped prepreg and bound, and this binding pressurizes the wrapped prepreg. In this pressurized state, heating is performed in a heating furnace, and the synthetic resin in the wrapped prepreg is cured by this heating,
Next, the core metal 5 for forming the grip portion is removed, and the cellophane tape is peeled off to form the grip portion 4 integrally connected to the rod body 2.

In addition, in the embodiment described above, the rotation stopper strip 12
Core metal 1 for molding the rod body with rotation prevention means such as
A rotation prevention means was provided on the outer periphery of the base end of the rod body 2, and this rotation prevention means was fitted into the fitting body 52 of the grip forming core bar 5, but other rotation prevention strips 12, etc. A rod body having no rotation prevention means such as the rotation prevention strip 21 is formed by using a core metal for molding a rod body that does not have rotation prevention means, and the base end inner circumferential portion of this rod body 2 is shaped like the rotation prevention means described above. It may be fitted into the fitting body 52 so as to be relatively unrotatable.

Further, the rotation preventing means provided on the fitting body 52 of the grip portion forming core metal 5 may include the rotation preventing strip 53 provided on the outer periphery of the fitting body 52 as described above, or, for example, the fitting body 52 may have a rectangular or elliptical cross section. The structure is not particularly limited. In short, any structure may be sufficient as long as the rod body 2 can be fitted in such a manner that the rod body 2 cannot be relatively rotated.

The grip portion 4 is formed into a straight cylinder shape with a tapered portion 41 as shown in FIG.
1 may be formed into an outwardly extending truncated conical shape.

In addition, the fishing rod formed as described above is used by connecting the handle 7 to the handle 7, which has a reel attachment part 71 on the tip side, as shown in FIG. 1, for example. It may be used without. When coupled to the handle 7, the grip portion 4 is formed into a truncated conical shape with a tapered portion 41 extending outward, and this tapered grip portion is coupled to the outside of the tip of the handle 7. It's okay.

As described above, the present invention provides a core metal for forming a grip portion having a fitting body at one end, a rotation preventing means is formed on the outer periphery of the fitting body of the core metal, and a sheet of high-strength fiber is attached to the fitting body. After winding the prepreg impregnated with resin and fitting the proximal end of the hollow rod body, which has been formed in advance by pressurizing and firing, so as to prevent relative rotation, the prepreg, which is a sheet of high-strength fiber impregnated with synthetic resin, is A grip having a tapered part that is wound around the core metal such that one end of the prepreg overlaps with the outer circumference of the proximal end of the rod body, and is fired under pressure to expand the diameter at a rate of change greater than the rate of change of the diameter of the rod body. Since the part is integrally connected to the rod main body, even if there is a large difference in outer diameter between the rod main body and the grip part, it is possible to prevent the prepreg for forming the grip part from being twisted when being wound. Therefore, it is possible to manufacture a fishing rod in which the rod body is straight with respect to the grip portion, and it is also possible to manufacture a fishing rod in which the strength at the joint between the rod body and the grip portion is not reduced.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an example of a fishing rod manufactured by the manufacturing method of the present invention coupled to a handle, Figures 2 and 3.
4 and 4 are explanatory diagrams showing the steps of the manufacturing method of the present invention, and FIG. 5 is a partially omitted cross-sectional view of a fishing rod manufactured by the manufacturing method of the present invention. 2... Rod body, 3, 6... Prepreg, 4...
Grip portion, 41...Tapered portion, 5... Core bar for molding the grip portion, 52... Fitting body, 53... Rotation preventing strip.

Claims (1)

[Claims] 1. A method for manufacturing a fishing rod in which a grip portion having a tapered portion whose diameter increases at a rate of change greater than the rate of change in the diameter of the rod body is coupled to the base end of a hollow rod body that is inclined in a tapered manner, the method comprising: A core metal for forming a grip portion having a fitting body is provided, a rotation preventing means is formed around the outer periphery of the fitting body of the core metal, and a prepreg made of a sheet of high-strength fiber impregnated with a synthetic resin is wound around this fitting body. After the base end of the rod body, which has been formed in advance by turning and firing under pressure, is fitted so as not to rotate relative to each other, a prepreg made by impregnating a sheet of high-strength fiber with a synthetic resin is attached so that one end of the prepreg is attached to the rod body. A method of manufacturing a fishing rod, characterized in that the grip portion is wound around the core metal so as to overlap with the outer peripheral portion of the base end, and the grip portion is integrally connected to the rod body by pressure firing.