JP2003070390A - Tip section rod or single pole fishing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the fixing force with an adhesive and the strength of the bonded part of a tip section rod or a single pole fishing rod produced by bonding a front and a rear sections. SOLUTION: The tip section rod or the single pole fishing rod is made of a fiber-reinforced resin and produced by bonding a front section 10 to a rear section 12. The surface of the bonding part 10T of a solid front section 10 produced by hot forming under pressure has irregularity 10S and the irregular surface is used as it is with little finishing by grinding. The bonding part is inserted into the bonding part 12T of the rear side tubular part 12 and fixed with an adhesive applied between the parts.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a tip rod or a single rod in which front and rear members are adhesively joined.

[0002]

2. Description of the Related Art Japanese Utility Model Publication No. 60-18048 discloses a tip rod in which a solid first tip and a hollow second tip are combined. The rear end portion of the solid first tip is made smaller in diameter and inserted into the tip portion of the hollow second tip to be adhesively fixed.

[0003]

However, fixing with an adhesive is generally unstable, and if there is no pool of adhesive, the fixing strength becomes small. Further, at the time of this bonding, the diameter of the rear end portion of the first solid tip is made to be small in diameter, which is usually performed by cutting, but the cutting cuts the reinforcing fiber. Stress concentration is likely to occur in the connecting and joining regions of the front and rear members, but when stress concentration occurs, peeling occurs from the cut reinforced fiber ends of the surface portion, and as a result, the rod is easily broken.
Therefore, an object of the present invention is to improve the fixing force by the adhesive and the strength of the joint portion of the tip rod or the single rod formed by joining the front and rear members.

[0004]

In view of the above object, in claim 1 of the present invention, a fiber-reinforced resin tip rod or a single rod in which front and rear members are joined is formed by heating while pressurizing. Concavities and convexities are formed on the joint surface of the front member,
The tip rod or the single rod is characterized in that the concavo-convex portion is used with almost no grinding and the joint portion is inserted and fixed to the joint portion of the rear tubular rear member with an adhesive interposed.
There are two ways to apply pressure during rod rod formation: using tightening tape and pressing with the mold.In the former case, the unevenness is the mark of the tightening tape, and in the latter case, the tightening is done on the inner surface of the mold. Unevenness of about the thickness of the tape is provided, and this is the molding irregularity by this mold. Grinding the irregularities almost does not mean that the surface is roughened to remove burrs, but so-called grinding work or cutting work is not performed. That is, most of the reinforcing fibers arranged in the uneven portion are not cut. When the surface is roughened, the irregularities are hardly ground, and the reinforcing fibers on the surface of the molding material are hardly cut. Therefore, the joint strength of the molding material does not decrease. The fact that the reinforcing fibers are hardly cut means that there is no state in which a large number of the reinforcing fibers S1 on the surface shown in FIG. 6 described later are collectively cut near the tops of the convex portions. In addition, since the unevenness remains, the adhesive agent is accumulated in the recessed portion, and the adhesive fixing strength is improved.

According to a second aspect of the present invention, the inner periphery of the end side region of the joint portion of the tubular rear side member is formed to be divergent, and the thickness of the end side region is made thinner toward the end face, and the solid front side is formed. The tip rod or the single rod according to claim 1, wherein the corresponding portion of the joint portion of the member has a correspondingly widened shape. If the inner circumference of the end side region of the tubular rear side member joint located outside the solid front side member joint is expanded to a thin wall, and the corresponding portion of the solid front side member joint is also made into a corresponding shape, The outer shape of the joined portion of the rod to which the members are joined can prevent a large step and improve the appearance, and also prevent stress concentration at the tip end position of the tubular rear member. Furthermore, the effect of the tubular rear member becomes smaller (specifically, the flexural rigidity contribution gradually decreases) toward the front side in the divergent joining region, and conversely, the effect of the solid front member becomes larger ( Specifically, the flexural rigidity contribution gradually increases), which can prevent a sudden change in the flexural rigidity of the joined tip rod or single rod at the joining part, resulting in stress concentration breakage during bending. It can be prevented.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a longitudinal sectional view of a main part of a tip rod according to the present invention, and FIG. 2 is an exploded view before joining. You can think of this as the main part of a single rod. Both the front member 10 which is a solid member and the rear member 12 which is a hollow member are rod members made of fiber reinforced resin, which are made of synthetic resin such as epoxy resin as a matrix and are reinforced by reinforcing fibers such as carbon fibers. The rear member 12 has its joint 12
T forms the inner circumference of the end side region 12B into a tapered shape with a certain degree of taper (taper ratio 4/1000 in this example), and the inner circumference of the rear side region 12A is the end side region. 12
It is looser than the taper on the inner circumference of B (for example, taper ratio 1/10
00) Formed in a divergent shape or a straight shape. Also, the outer shape is a gentle tapered shape or a straight shape,
The wall thickness of the end portion side region 12B is made thinner toward the front end.

On the other hand, referring to FIGS. 3 and 4, the front member 10
The molding method will be described. First, glass fiber is used as a reinforcing fiber oriented in the axial direction, and the prepreg P1 is wound around the second half region of the preformed solid member 10C. The layer corresponding to this prepreg P1 is 10P1 in FIG.
Is shown as. The prepreg P1 has a trapezoidal shape as shown in which carbon fibers are oriented in the axial direction. On this winding prepreg, the front side position, which is separated from the rear end side position of this winding prepreg by a predetermined amount 10A ', is set as the rear end P2K, and the triangular prepreg P2 as shown in the figure is provided up to the front end of the solid member. To wind. This prepreg P
The layer corresponding to 2 is illustrated as 10P2 in FIG.

The prepreg P2 is made by laying a glass fiber woven fabric (fiber directions are the axial direction and the circumferential direction) on a sheet on the back side of which the carbon fibers are oriented in the axial direction.
The rear side L2 of the prepreg P2 over the width 10B 'is inclined as shown in the drawing. Therefore, the number of windings increases over the width 10B' from the rear end P2K of the prepreg P2 toward the front. Become.

Further, a rectangular prepreg including a woven cloth-like glass fiber whose fiber direction is the axial direction and the circumferential direction is a reinforcing fiber in the tip region of the wound prepreg P2 including the tip of the solid member. Wind P3. Then, as shown in FIG. 4, the prepregs P1 and P are attached to the solid member as shown in FIG.
A winding pitch P (for the front member 10 for the tip rod, for example, a pitch of about 2 mm) is wound around the material in which 2 and P3 are wound.
Then, the tightening tape 14 is wound from the rear end side and heat-molded.
Then, the tightening tape is removed. The main part of the front member 10 thus molded is shown in FIG. If burrs are noticeable after removing the tightening tape, the surface of the area 10T used for joining and the area in the vicinity thereof may be ground to a degree of roughening, but to the extent that the reinforcing fibers on the surface are hardly damaged. To do. No grinding is done. Therefore, even if it receives a large amount of bending, it is possible to prevent the problem of peeling damage from the end portion of the reinforcing fiber. Areas outside these areas are irrelevant to the present invention and may be ground or the like.

FIG. 5 is a partial schematic enlarged cross-sectional view of the corresponding portion 10A 'of the joint immediately after heat molding (before surface roughening).
The reinforcing fibers S1 on the surface portion are uneven 10S 'due to the tightening force.
It meanders along. The top CB of the convex portion of this unevenness
Burrs may occur in the vicinity of the (resin part), and when the surface state is lightly roughened, the state shown in FIG. 6 is obtained. As a result, the top portion CB of the convex portion is in a state C with some corners removed.
It becomes B '. Further, the meandering reinforcing fibers S1 can be polished to such an extent that they are scratched in the vicinity S1C near the top CB 'of the convex portion, but in this vicinity, the state in which the reinforcing fibers are collectively cut does not occur.

As is apparent from the above description of the manufacturing method, a small diameter portion 10A is formed at the rear end of the solid front member 10 and a tapered portion 10B is formed at the tip of the small diameter portion 10A. And become the joint portion 10T. The rear member 12
Although the inner periphery of the end side region 12B of the joining portion 12T is formed in a tapered shape, the taper portion 1 of the front member 10 is formed.
It is formed corresponding to the taper of 0B. Also, the inner diameter of the rear region 12A of the rear member joining portion 12T corresponds to the outer diameter of the small diameter portion 10A of the front member. Furthermore, at least
Unevenness 10S due to tape marks remains on the surface of the front member 10 near the joint 10T. Therefore, the joint 10T
The adhesive applied to the stagnation collects in the concave and convex portions and can be firmly fixed by inserting it into the rear member.

The tightening tape 14 shown in FIG.
It is also possible to wind from the front side of 0 '. In this case, the concavo-convex state of the tape mark is the opposite of the state shown in FIG. 2, and in this case, considering the limit state where the connection adhesive force is destroyed, If the members are in a tightly fitted state, the frictional resistance between the inner surface of the joint of the rear member 12 and the convex and concave portions is large, and it is difficult to pull them out.

The end side region 12B of the joint portion of the rear member 12
The rear member 12 has a shape as described above.
The stress concentration of the front member 10 at the tip position of is reduced. In addition, the step difference at the end of the joint region becomes small, which is preferable in terms of appearance. The case where only the outer periphery of the solid front member is formed to be uneven has been described, but if the outer periphery of the hollow rear member 12 is also formed to be uneven, it is unclear at first glance where it is joined, and it is integrated. It gives the impression of being a rod.

[0014]

As is apparent from the above description, according to the present invention, there is provided a tip rod or a single rod in which front and rear members are joined to improve the fixing force by the adhesive and the strength of the joint. Can be provided.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of an ear rod according to the present invention.

FIG. 2 is an exploded view of the tip rod of FIG. 1 before joining.

FIG. 3 is a diagram illustrating a method of manufacturing a front member used for the tip rod of FIG. 1.

FIG. 4 is a manufacturing process diagram following FIG. 3;

FIG. 5 is a partial schematic enlarged cross-sectional view of a joint portion immediately after thermoforming.

FIG. 6 is a partial schematic enlarged cross-sectional view of a joint portion after surface roughening.

[Explanation of symbols]

10 Solid front member 10S unevenness 10T joint 12 Hollow rear member 12T joint

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) A01K 87/00 630C

Claims (2)

[Claims] 1. A tip rod or a single rod made of fiber reinforced resin in which front and rear members are joined, wherein unevenness is formed on the joint portion surface of the solid front member which is heat-formed under pressure,
An ear rod or a single rod, characterized in that these irregularities are used with little grinding and the joint is inserted and fixed to the joint of the tubular rear member on the rear side with an adhesive interposed. 2. The solid front member is joined by forming the inner periphery of the end portion side region of the joint portion of the tubular rear member into a divergent shape so that the thickness of the end portion side region becomes thinner toward the end face. The tip rod or the single rod according to claim 1, wherein the corresponding portion of the portion is formed in a correspondingly divergent shape.