JP2537157B2 - Mandrel for forming 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 an improvement of a fishing rod forming mandrel.

[0002]

2. Description of the Related Art In order to form a bulging portion on a fishing rod, as shown in JP-A-60-250942, a tapered core metal and a sheet-shaped core such as a woven cloth or a synthetic fiber cloth which can be wound in multiple layers. After winding the material and winding the prepreg on the outside and heating and firing,
A method of removing a cored bar and taking out a wound sheet-shaped core from an opening formed by removing the cored bar, and forming the cored bar, as disclosed in Japanese Patent Laid-Open No.
No. 2-23735, a rubber core material is added on a prepreg wound on a tapered core metal, or a rubber core material is added on the core metal and then the prepreg is wound and heated. A method is known in which a fired core metal and a rubber core material are extracted and formed.

[0003]

In the multi-winding sheet method of the core material, it is impossible to partially form a raised portion in the circumferential direction of the fishing rod, and the core material is multi-wound on the core metal. The operation of removing the rubber core material is troublesome, and the method of attaching the rubber core material is the circumferential direction at the time of prepreg winding operation and taping.
The rubber core material is particularly likely to move in the circumferential direction due to the load acting in the opposite direction, and the rubber core material may be deformed by the binding of cellophane tape or the heating and firing process, or the rubber core material may be difficult to remove.
There is a problem that it cannot withstand long-term use. SUMMARY OF THE INVENTION It is an object of the present invention to provide a mandrel for forming a fishing rod, which solves these problems and allows the raised portion of the fishing rod to be formed easily and reliably.

[0004]

In order to achieve the above object, the present invention is a cross section in which a flat mounting portion is formed on one side of an outer peripheral portion.
The gist of the present invention is that it is composed of a circular tapered core metal and a convex portion forming die that can be separably abutted on the flat mounting portion and is gradually raised toward the large diameter side of the core metal. Yes,
When the flat mounting portion of the tapered core metal is provided with a locking groove for preventing movement of the convex forming mold, the work of winding the prepreg becomes easier.

[0005]

According to the mandrel for forming a fishing rod of the present invention, the convex forming mold is placed on the flat mounting portion of the tapered core metal, and the prepreg is wound around the outer periphery of the core metal and the convex forming mold. After heating and firing to form a fishing rod, the cored bar is pulled out, the projection forming mold is also removed from the cored bar pulling-out portion to form a fishing rod integrally formed with a raised portion.

[0006]

EXAMPLE A mandrel for forming a hollow fishing rod having a raised fishing line insertion portion according to the present invention will be described. The mandrel 1 is a tapered core having a flat mounting portion 2 formed in a portion where the raised portion is formed. Gold 3 and the flat mount 2
It is configured by a convex portion forming die 4 which can be placed on the flat metal portion 3 and is gradually raised toward the large diameter side of the core metal 3, and is locked to the flat mounting portion 2 so that the convex portion forming die 4 does not move. A groove 5 is provided.

When manufacturing a hollow fishing rod using the mandrel 1, however, the locking groove 5 is formed so as not to move the convex forming die 4 on the flat mounting portion 2 of the tapered core metal 3.
A known prepreg sheet 6 for constructing a fishing rod is wound around the outer periphery of the core metal 3 and the convex portion forming die 4 once to several times for one ply or continuously for one to several times. Put on the ply. Before the prepreg sheet 6 is wound, one thin ply of the reinforcing prepreg sheet 7 is wound around the protrusion forming mold 4 and then the prepreg sheet 6 is wound, or the prepreg sheet 6 is wound. It is also possible to preliminarily polymerize the reinforcing prepreg sheet 7 for one ply and then wind both of them together.

After the cored bar 3 on which the prepreg sheet 6 is wound in this manner is brought into close contact with the cored bar by rolling means,
If necessary, apply the convex patch 8 to the rear of the convex forming mold 4 and wrap it in a spiral shape so as to partially overlap the tape between the prepreg sheet 6 and the external of the convex patch 8 and bind them together. Then, this is heat-cured by a conventional method. Next, after the cored bar 3 is pulled out, the raised portion 9 formed is tapped from the outside to remove the convex portion forming die 4, and at the same time, the tape is peeled off, the surface is polished, and the coating is applied to form the tubular body 10. A fishing line insertion hole 11 is bored with the rear end surface of the raised portion 9 oriented substantially in the direction of inclination of the raised portion, and a fishing line guide 12 is attached to the fishing line insertion hole 11 to form a hollow fishing rod.

As described above, the mandrel 1 of the present invention has a tapered cored bar 3 having a flat mounting part 2 and a gradual bulge toward the large diameter side of the cored bar which can be mounted on the flat mounting part 2 in a separable manner. The protrusion 9 can be easily and surely formed in a required portion of the fishing rod by a combination with the above convex forming die, and the convex forming die 4 is locked by the locking groove 5 so as not to move so that the fishing rod forming work can be performed. It can be made even easier.

[0010]

According to the mandrel of the present invention, a tapered core metal having a flat mounting portion and a mandrel which can be detachably mounted on the flat mounting portion and which gradually protrudes toward the large diameter side of the core metal are formed. Since it is composed of a mold, by stably holding and mounting the convex forming mold on the tapered core metal, its movement can be easily performed against circumferential loads such as winding operation and taping operation of the prepreg.
It can be easily and reliably prevented to facilitate the operation and accurately form a fishing rod with a required raised portion, and it can be used for a long period of time, and when a locking groove is provided on a flat mounting portion. The movement of the convex forming mold can be prevented more reliably,
The formation of the fishing rod can be further facilitated.

[Brief description of drawings]

FIG. 1 is a plan view of the present invention.

FIG. 2 is a vertical sectional front view of the same.

FIG. 3 is a sectional view taken along the line II in FIG.

FIG. 4 is a sectional view taken along the line II-II in FIG.

FIG. 5 is a plan view of an essential part of the present invention.

FIG. 6 is a front view of the main part.

FIG. 7 is a vertical sectional front view of the main part.

FIG. 8 is a cross-sectional view of a fishing rod formed according to the present invention.

[Explanation of symbols]

 1 Mandrel 2 Flat Mounting Part 3 Core Bar 4 Convex Forming Type 5 Locking Groove

Claims (2)

(57) [Claims] 1. A cross forming a flat mounting portion on the outer peripheral portion on one side
The fishing rod is characterized by comprising a tapered core metal having a circular surface shape and a convex portion forming die which can be separably abutted on the flat mounting portion and is gradually raised toward the large diameter side of the core metal. Forming mandrel. 2. The mandrel for forming a fishing rod according to claim 1, wherein the flat mounting portion of the tapered core metal is provided with a locking groove for preventing movement of the convex forming die.