JPH0511026B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a fishing rod, and more specifically, the present invention relates to a method for manufacturing a fishing rod, and more particularly, to a method for manufacturing a fishing rod. The present invention relates to a method of manufacturing a fishing rod, in which a handle portion is provided with a grip portion whose diameter expands at a rate of change greater than the rate of change of the diameter of the rod body.

(Prior art) Conventionally, as a method of manufacturing this type of fishing rod,
As described in Publication No. 59-182173, there is a molded part whose size corresponds to the inner diameter of the hollow rod body whose diameter increases in a taper shape from the tip end toward the base end, and a molded part whose size corresponds to the inner diameter of the grip part. The prepreg is wrapped around the outer periphery of the core metal, and cellophane tape is spirally wrapped around the outer periphery of the wrapped prepreg to bind it. The wrapped prepreg is pressurized, heated in a heating furnace in this pressurized state, the synthetic resin in the wrapped prepreg is once softened and hardened by this heating, and then the core bar is removed, and the It is known that the rod body and the grip portion are integrally formed by peeling off the cellophane tape.

(Problems to be Solved by the Invention) However, according to this conventional manufacturing method, when the cellophane tape is wrapped around the outer periphery of the wrapped prepreg and fired, the cellophane tape stretches due to the firing heat. As a result, the pressure applied by the cellophane tape decreases as shown in Figure 8, and as a result,
The uniformity of the wrapped prepreg deteriorated, and wrinkles or bubbles were sometimes formed on the surface of the prepreg. These wrinkles and air bubbles are exposed on the surface of the grip after firing, resulting in a decrease in quality.

The present invention was invented in view of the above points, and focusing on the fact that the elastic force of rubber material hardly changes due to heat, the core material for molding the grip part is formed from this rubber, The elasticity of the rubber core material is used to prevent the pressing force from decreasing during firing, thereby preventing wrinkles and bubbles from forming in the grip.

(Means for Solving the Problems) Accordingly, the present invention provides prepreg of high-strength fiber impregnated with synthetic resin to the core bar 2 whose diameter increases in a taper shape from the tip end toward the base dark part. A rubber core is provided on the outer surface of the proximal end of the hollow rod body 1 to be wrapped and formed, or on the outer surface of the proximal end of the core metal 2, which is inclined in the direction of diameter expansion at a rate of change greater than the rate of change of the diameter of the rod body 1. A high-strength fiber prepreg impregnated with synthetic resin is attached to the surface of the rubber core material 3, and after pressurized firing, the core metal 2 and the rubber core material 3 are removed, and the rod is removed. It is constructed so as to form a grip portion 4 integral with the main body 1.

(Function) When applying pressure to the prepreg that is wrapped with cellophane tape and attached to the surface of the rubber core material 3, the rubber core material 3 is slightly elastically deformed and pressure is applied to the rubber core material 3. By firing under pressure, the rubber core material 3 recovers elastically in response to the elongation of the cellophane tape, and this elastic restoring force prevents a decrease in the pressing force of the prepreg due to the elongation of the cellophane tape. This prevents wrinkles and bubbles from forming in the grip portion 4.

(Example) The example shown in FIGS. 1 and 2 is a rod having a molded part 2a of a size corresponding to the inner diameter of a hollow rod body 1 whose diameter increases in a taper shape from the tip end toward the base end. A core metal 2 for forming the main body, and a tapered surface 3a that slopes in the diameter expanding direction at a rate of change greater than the rate of change of the diameter of the rod body 1.
A semi-cylindrical rubber core material 3 is provided, and a first prepreg made of high-strength fiber impregnated with synthetic resin is wrapped around the outer periphery of the core material 2, as shown in FIG. 1A, to form a hollow rod. The main body 1 is molded, and the rubber core material 3 is attached to the outer surface of the proximal end of the rod main body 1 as shown in FIG. A second prepreg made of high-strength fiber impregnated with a synthetic resin is wrapped, and a cellophane tape (not shown) is spirally wrapped around the outer periphery of the wrapped second prepreg and the rod body 1. The rod body 1 and the wrapped second prepreg are pressurized by the tightening, heated in a heating furnace in this pressurized state, and the synthetic resin in the rod body 1 and the wrapped second prepreg is once softened by this heating. Then, the core bar 2 and the rubber core material 3 are pulled out to the outside of the base end of the rod body 1, and the cellophane tape is peeled off.
It is constructed so as to form a grip portion 4 integral with the rod body 1.

In the above configuration, the rubber core material 3 is made of a rubber material whose elastic force hardly changes depending on the heat (approximately 150 to 180 degrees Celsius) during the firing. This elasticity is used to prevent a reduction in pressing force due to the binding of the cellophane tape during the firing.

That is, when wrapping the cellophane tape, the rubber core material 3 is slightly elastically deformed, pressure is applied to the rubber core material 3, and the rubber core material 3 is fired in this pressurized state. When the cellophane tape stretches, the rubber core material 3 recovers elastically in response to this stretch, and this elastic restoring force can compensate for the decrease in pressing force due to the stretch of the cellophane tape.

Therefore, according to the present invention, there is no decrease in the pressing force during firing, and the predetermined pressing force can be maintained, so that the uniformity of the wrapped second prepreg can be improved, and the wrapped second prepreg is free from wrinkles. And it can prevent the formation of bubbles.

Furthermore, although the rubber core material 3 is mainly made of urethane rubber, it may be made of other rubbers.

Furthermore, when wrapping the second prepreg around the rubber core material 3, wire rods 55 made of high-strength fibers are attached to both ends of the rubber core material 3 in the circumferential direction as shown in FIG. Wrapping is preferred.

Further, the second prepreg is wrapped around the outer periphery of the rod body 1 and the rubber core material 3, but in other cases, it is attached only to the surface of the rubber core material 3 and its edge is wrapped around the rod body 1. It is also possible to polymerize the outer circumferential surface and bond the polymerized portion by the pressure firing described above.

Further, in the embodiment shown in FIG. 1, the rubber core material 3 is provided with a reverse tapered surface 3b that is continuous with a tapered surface 3a that slopes in the diameter expanding direction at a rate of change greater than the rate of change of the diameter of the rod body. A prepreg made of high-strength fiber impregnated with synthetic resin is wrapped around the surface of this inverted tapered surface 3b, and a reverse taper is formed at the rear end of the grip portion 4, which expands in diameter at a rate of change greater than the rate of change in the diameter of the rod body. Surface 4a
is provided to prevent the hand gripping the grip part 4 from slipping in the length direction of the rod body 1. In this case, when the rubber core material 3 is extracted by pressure firing as described above, the rubber core material 3 is elastically deformed and extracted by this extraction force. Note that the reverse tapered surface 3
The prepreg wrapped around b may be formed integrally with the second prepreg. However, by forming it separately as in the embodiment, there is an advantage that when it is wound around the rubber core material 3, it can be wrapped so that wrinkles are not formed on the surface. Note that the reverse tapered surface 3b is not necessarily required.

In addition, the embodiment shown in FIG. 5 is constructed so that the grip part 4 is formed integrally with the rod body 1 by using prepreg for forming the rod body. The rubber core material 3 is attached to the outer periphery of the proximal end, and then the first prepreg is wrapped around the outer periphery of the core bar 2 and the surface of the rubber core material 3, and a cello is attached to the outer periphery of the wrapped prepreg. Fan tape (not shown)
is spirally wound and bound, the wrapping prepreg is pressurized by the binding, a heating furnace is heated in this pressurized state, and the synthetic resin in the wrapping prepreg is once softened and hardened by this heating, Next, the core bar 2 and the rubber core material 3 are pulled out to the outside of the base end of the rod body, and the cellophane tape is peeled off to integrally form the rod body 1 and the grip portion 4.

In this case as well, the rubber core material 3 is slightly elastically deformed by wrapping the cellophane tape,
Pressure is applied to the rubber core material 3 to compensate for the decrease in pressing force due to the elongation of the cellophane tape.

Also, in the case of this embodiment, the rubber core material 3 is provided with a reverse tapered surface 3b;
b is not necessarily necessary. In addition, when providing this reverse tapered surface 3b, the rubber core material 3 is elastically deformed and removed.

In the embodiments described above, the rubber core material 3 is formed into a semi-cylindrical shape, but it may also be formed into a cylindrical shape with a tapered surface that slopes in the direction of diameter expansion at a rate of change greater than the rate of change in the diameter of the rod body. Alternatively, it may be formed into a cylindrical shape having the tapered surface and a reversely tapered surface.

Further, the rubber core material 3 can be attached to the outer peripheral surface of the rod body 1 or the core metal 2 via, for example, an adhesive synthetic resin sheet, so that the rubber core material 3 can be accurately held in a predetermined position. It can be stopped.

(Effects of the Invention) As described above, the present invention forms a rubber core material 3 for molding the grip that is inclined in the direction of diameter expansion at a change rate larger than the change rate of the diameter of the rod body 1, and After attaching prepreg to the surface and firing under pressure, the rubber core material 3 is removed and the grip part 4 integrated with the rod body 1 is removed.
Therefore, even when the cellophane tape is bound and pressed and then fired, even if the cellophane tape stretches due to the firing heat, the elasticity of the rubber core material 3 is used to prevent the This can compensate for the drop in pressure. Therefore, the pressure does not decrease during firing and can be maintained at a predetermined pressure, so the uniformity of the prepreg can be improved, and the formation of wrinkles and air bubbles in the prepreg and, by extension, in the grip portion 4 can be prevented. be.

[Brief explanation of the drawing]

Figures 1A and 2B are explanatory diagrams showing the steps of the manufacturing method of the present invention, Figure 2 is a cross-sectional view taken along the - line in Figure 1B, and Figure 3 is a cross-section of only the main parts of the fishing rod manufactured by the manufacturing method of the present invention. 4 is a sectional view taken along the line of FIG. 3, FIG. 5 is an explanatory diagram showing another manufacturing method, FIG. 6 is a sectional view of only the main parts of a fishing rod manufactured by this other manufacturing method, and FIG. The figure is a sectional view taken along the line of FIG. 6, and FIG. 8 is an explanatory diagram showing the relationship between the pressure applied by the cellophane tape and the firing temperature. 1... Rod body, 2... Core metal, 3... Rubber core material,
4...Grip part.

Claims (1)

[Claims] 1. A base end portion of a hollow rod body 1, which is formed by wrapping a prepreg of high-strength fiber impregnated with synthetic resin around a core metal 2 whose diameter increases in a taper shape from the tip end toward the base end. A rubber core material 3 is attached to the outer surface or the outer surface of the proximal end of the core bar 2, and the rubber core material 3 is inclined in the diameter expanding direction at a rate of change greater than the rate of change in the diameter of the rod body 1. After attaching a prepreg made of high-strength fiber impregnated with synthetic resin and firing under pressure, the core bar 2 and the rubber core material 3 are removed, and the rod body 1 is removed.
A method for manufacturing a fishing rod, characterized in that a grip part 4 is formed integrally with the fishing rod.