JP2533224Y2 - Tubular body - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular body formed by winding a prepreg obtained by impregnating a resin into a high-strength fiber such as carbon fiber or glass fiber around a core material and firing it. The present invention relates to a tubular body having a projection formed on an inner periphery thereof.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Laid-Open Publication No.
No. 4836 is disclosed, and in this conventional example, a thread guide member formed in a spiral shape is inserted and fixed to the inner surface of a through rod used as a fishing rod to improve the guiding performance of the fishing line. .

[0003]

Here, considering the above-mentioned conventional example, in the case where the thread guide member is arranged inside the hollow rod as described above, the form in which the thread guide member protrudes from the inner surface of the rod is described. Therefore, it is possible to avoid the contact between the fishing line and the rod material to prevent wear on the inner surface of the rod material, and to reduce the contact area with the fishing line, thereby reducing the resistance during the winding operation of the fishing line. It has what has. Further, the fishing rod is required to be flexible and have high flexibility, and when a member having a property different from that of the rod material is inserted and fixed therein as in the conventional example, not only does the flexibility of the fishing rod deteriorate, but also Due to repeated bending, the above-described yarn guide member may peel off from the rod material, and there is room for improvement.

An object of the present invention is to form a projection on the inner surface without deteriorating the flexibility and to form a tubular body that is less likely to peel off from the projection.

[0005]

The buckling structure of the tubular body of the present invention is obtained by winding a prepreg (5) obtained by impregnating a high-strength fiber such as carbon fiber or glass fiber with a resin around a core material (3) and firing it. The tubular body is formed into a tubular shape by performing, on the inner peripheral surface of the tubular body main body (1), the entire circumference as viewed in the axial direction, or
A projecting portion (2) projecting to the axial center side over substantially the entire circumference is formed integrally with the material of the tubular body (1), and the projecting portion (2) is distributed in the axial direction, and the projecting portion (2) is formed. The inner peripheral surface of 2) has a substantially axially linear portion. Further, in the bending structure of the tubular body of the present invention, the projecting portion (2) extends from one end to the other end of the tubular body (1), and the axis (X) of the tubular body (R) is formed. ) Is a tubular body of the present invention formed in a spirally continuous shape around the center.

[0006]

When the above-mentioned feature is constituted, for example, as shown in FIG. 1, when this tubular body R is bent, the tubular body 1 is bent.
With the bending of the inner surface, the protrusion 2 on the inner surface also bends,
Since the projecting portion 2 is formed integrally with the tubular body 1 and is made of the material of the tubular body 1, peeling hardly occurs.
Moreover, since the protruding portion 2 is formed on substantially the entire circumference when viewed in the axial direction, the protruding portion 2 bends with respect to the load regardless of the load direction .
(Deflection) amount.

[0007]

As a result, a protruding portion is formed on the inner surface without deteriorating the flexibility, and the protruding portion is rationally constructed to be less prone to peeling. In particular, when this tubular body is used for a hollow rod, the fishing line is prevented from coming into contact with the tubular body and wear of the tubular body is suppressed.Moreover, since the projecting portion contains high-strength fibers, While suppressing the wear of the protruding portion, the fishing line can be sent lightly by reducing the contact area, and a good bending property can be exhibited.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a tubular body R used for a hollow rod. The tubular body 1 is made of a resin containing a high-strength fiber such as carbon fiber or glass fiber and formed into a loosely tapered shape.
And a projecting portion 2 integrally formed on the inner peripheral surface of the tubular body 1 with the material of the tubular body 1. The protruding portion 2 is formed into a shape spirally extending from one end to the other end of the tubular body R around the axis X of the tubular body R, and the protruding portion 2 and the tubular body R are formed. The main body 1 is manufactured as follows.

That is, as shown in FIG. 2, at the time of this production, first, a resin tape 4 having good peelability and having an appropriate thickness , such as polyester, is applied to the outer periphery of a mandrel 3 as a core material formed into a loosely tapered shape. It is spirally wound at a predetermined interval. Next, as shown in FIG. 3, a sheet-shaped prepreg 5 in which high-strength fiber such as carbon fiber or glass fiber is impregnated with epoxy resin is wound around the mandrel 3 and the outer periphery of the resin tape 4 in a predetermined manner. Turn several spirally wound, further wound a heat-shrinkable tape 6 in this outer surface, and thereafter fired at a predetermined temperature. The molding of the tubular body R is completed by the hardening of the prepreg 5 by this baking, and thereafter, the mandrel 3 is pulled out to leave the resin tape 4 on the inner periphery of the tubular body R, as shown in FIG. A tubular body having a helical projection 2 on the inner peripheral surface as shown in FIG. 1 by removing the resin tape 4 and removing the heat-shrinkable tape 6 so as to peel it off from the ends R is obtained.

Incidentally, in the tubular body R thus manufactured, the fishing line is prevented from coming into contact with the tubular body 1 to suppress the wear of the tubular body 1, and the protruding portion 2 contains high-strength fibers. Therefore, while suppressing the wear of the protruding portion 2, the fishing line is lightly sent by reducing the contact area, and good bending without applying excessive stress or the like between the tubular body 1 and the protruding portion 2. It will be able to show sex.

[Other Embodiments] In addition to the above-described embodiment, the present invention employs, for example, winding a resin tape in an independent ring shape around a mandrel when manufacturing a tubular body, as shown in FIG. It is also possible to form a plurality of independent ring-shaped protrusions 2 integrally with the tubular body 1. Also, in the present invention, it is possible to use a golf club shaft other than the through rod,
Can also be used for fishing rods with guides.

In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a sectional view of a tubular body.

FIG. 2 is a perspective view of a step of winding a resin tape around a mandrel.

FIG. 3 is a perspective view of a step of winding a heat shrink tape around an outer surface of a prepreg.

FIG. 4 is a perspective view of a step of peeling a resin tape.

FIG. 5 is a sectional view of a tubular body of another embodiment.

[Description of Signs] 1 tubular body 2 projecting part 3 core material 5 prepreg R tubular body X axis core

Claims (2)

(57) [Scope of request for utility model registration] 1. A tubular body formed by winding a prepreg (5) obtained by impregnating a resin into a high-strength fiber such as carbon fiber or glass fiber around a core material (3) and firing it, The inner peripheral surface of the body body (1) is integrally formed with a protruding portion (2) protruding toward the axis over the entire circumference or substantially the entire circumference when viewed in the axial direction, using the material of the tubular body body (1). The projection (2) is distributed in the axial direction , and the inner peripheral surface of the projection (2) is
A tubular body having a substantially axially straight portion . 2. The method according to claim 1, wherein the projecting portion (2) is provided on
2. The tubular body according to claim 1, wherein the tubular body is formed in a shape that extends spirally from one end to the other end about the axis (X) of the tubular body (R).