JPH067058A - Production of fishing rod - Google Patents

Abstract

PURPOSE:To obtain a method for producing strong fishing rod made it possible to prevent occurrence of deviation of a fiber end part, meandering, crease and difference in step, dispersed in stress during use, reduced in concentration of stress, improved in strength and capable of improving flexural balance and preventing the curvature. CONSTITUTION:A sheet-like prepreg 1 obtained by impregnating a high strength fiber with a synthetic resin is continuously cut at a crossing change point (alpha) position of a cutting line (a) inclined in the longitudinal direction and other cutting line (b) and crossing change point (beta) of the cutting line (a) and other cutting line (c) with curved cutting lines (d) and (e), respectively. Namely, the prepreg 1 is cut from the right side to the left side with the linear cutting line (c), curved roll line (e), the linear cutting line (a), the curved cutting line (b). After the prepreg 1 is subjected to taping with a tape by properly winding around a core several times, the prepreg is put in a heating furnace and integrally formed by thermosetting treatment according to an ordinary method and pulling-out of core, release of tape and polishing of outer shape are carried out according to an ordinary method to provide a rod pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a fishing rod for forming a high-strength fiber reinforced rod tube by cutting the intersection of a cutting line inclined in the longitudinal direction of a prepreg and another cutting line with a curved cutting line. Regarding

[0002]

2. Description of the Related Art Conventionally, a fishing rod consisting of a rod tube manufactured by winding a prepreg impregnated with synthetic resin in high-strength fiber around a core metal has a taper portion on the outer circumference in the longitudinal direction of the fishing rod.
As shown in Japanese Patent Laid-Open No. 2-113931 and FIG. 8, the core metal 4 of FIG.
While forming the taper portion on the prepreg 7, the prepreg 7 was cut along the straight line of the cutting line a inclined in the longitudinal direction and the other cutting lines b and c so as to correspond to the taper portion.

As described above, when the cutting line a inclined in the longitudinal direction and the other cutting lines b and c are cut by straight lines so that the prepreg 7 corresponds to the taper portion, the cutting direction is sharp. There are crossing change points α and β between the cutting lines that change to. When the intersection change points α and β are formed, the fibers on the side of the cutting lines a and c at the intersection change points α and β become the cut end portions which are abruptly changed. Among the crossing change points α and β of the cutting lines at the time of cutting, the crossing change point α, which is particularly inside, has a drawback of cutting more into the cutting line a side or other cutting line b side and both sides like a broken line, The more cuts, the shorter the fibers that should be long.

Next, in the processing step of winding the prepreg around the core metal 4, the following defects occur at the crossing change points α and β between the cutting line a inclined in the longitudinal direction and the other cutting lines b and c. Was there. After winding the prepreg, tape outside the intersection change point.
When pinging is performed, the tension of the tightening tape causes the fiber 2 end portion at the intersection change point α to change abruptly in the cutting direction as shown in FIG. 9, resulting in misalignment, meandering, or wrinkling. To do. For this reason, a portion where fibers are overlapped with each other at a crossing change point of the wound prepreg and a portion where no fiber is formed are formed, and the portion where no fiber is formed in the rod tube after molding has low strength and is easily damaged.
Since the cutting direction changes abruptly at the intersection change point, the impregnated resin becomes coarse and dense at the time of heat curing, and steps 8 are formed as shown in FIG. When using a fishing rod,
The bending balance at the intersection change point becomes unbalanced and bending occurs. When a combined force of bending force and twisting force acts on the intersection change point, stress concentration occurs on the fiber-free portion or the step portion, and the fiber is easily damaged.

[0005]

The problem to be solved is that there is a part where the fibers overlap at the crossing change point of the wound prepreg and a part where the fibers do not exist, and the fibers of the rod tube after molding are If the strength is reduced and the breakage easily occurs in the non-existing part or the step part, the bending balance at the intersection change point becomes unbalanced or bending occurs, and the combined force of bending force and twisting force acts on the intersection change point, the fiber That is, stress concentration occurs in the non-existing portion and the step portion, and the portion is easily damaged.

In view of the above-mentioned drawbacks, an object of the present invention is to cut a prepreg so as not to have a crossing change point, prevent misalignment of the fiber end, meandering, wrinkles and steps, and provide a strong fishing rod, It is an object of the present invention to provide a method for manufacturing a fishing rod, in which stress is dispersed during use, stress concentration is reduced, strength is improved, bending balance is improved, and bending can be prevented.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a cross section of a sheet-like prepreg in which high-strength fibers are impregnated with a synthetic resin and a cutting line inclined in the longitudinal direction and another cutting line intersect with each other at a curved cutting point. After cutting with a wire, wind the prepreg around the core metal,
The gist of the present invention is to carry out taping, heat firing, and then pull out the core metal and peel the tape by a conventional method.

[0008]

When the prepreg 1 is wound around the core metal 4 an appropriate number of times, as shown in FIG. 4, a sheet of high strength fiber impregnated with synthetic resin is used.
Since the intersection change point α position of the cutting line a inclined in the longitudinal direction of the tongue-shaped prepreg 1 and the other cutting line b is continuously cut at the curved cutting line d, a gentle curve is formed in the outer peripheral direction. Become. The intersection change point β position between the cutting line a and the other cutting line c is also continuously cut along the curved cutting line e, so that it becomes a gentle curve in the outer peripheral direction. When the crossing change points α and β cannot be formed in the cutting line in the cutting process of the prepreg 1 and the cutting line becomes a gentle curve in the outer peripheral direction when the prepreg 1 is wound, tension is applied by winding the tightening tape 5. Also, it is difficult to form deviations, meanders, wrinkles and steps at the ends of the high-strength fiber 2, and it is not possible to form overlapping parts or parts without fibers, and the strength of the rod pipe 6 after molding is improved and it is less likely to be damaged. . Furthermore, when the fishing rod is used, the bending balance is improved and the occurrence of bending is prevented, and even if a combined force of bending force and twisting force is applied, stress is dispersed and stress concentration does not occur in one place, so it is difficult to damage .

[0009]

Embodiments of the present invention will now be described with reference to the drawings. First Embodiment FIGS. 1 to 5 show a first embodiment, FIG. 1 is a plan view of a sheet-shaped prepreg, and FIG. FIG. 3 is a plan view of the sheet and the sheet-shaped prepreg, FIG. 3 is a plan view in which the prepreg wound on the core bar is taped, and FIG. 4 is an enlarged main part of the prepreg wound on the core bar. A plan view and FIG. 5 are plan views of the molded fishing rod rod tube.

In FIG. 1, a sheet-shaped prepreg 1 obtained by impregnating high-strength fibers with a synthetic resin has a position α at which a cutting line a inclined in the longitudinal direction intersects another cutting line b, a cutting line a and other points. The crossing change point β position of the cutting line c of the
Has been continuously cut with. That is, cutting is performed continuously from the right side to the left side with a straight cutting line c, a curved cutting line e, a straight cutting line a, a curved cutting line d, and a straight cutting line b. . The high-strength fiber 2 is woven in the lateral direction. FIG. 2 shows a state in which the sheet-shaped prepreg 1 of FIG. 1 and the aligning sheet 3 of the high-strength fiber 2 are sequentially wound around the cored bar 4. Also in the aligning sheet 3, the crossing change point position of the cutting line f inclined to the longitudinal direction and the other cutting line g, and the crossing change point position of the cutting line f and the other cutting line h are respectively curved cutting lines. It is continuously cut at i and j. In FIG. 2, the sheet-shaped prepreg 1 may be used as an aligned sheet for the high-strength fibers 2.

FIG. 3 shows that the prepreg 1 is wound around the cored bar 4 a proper number of times in FIG. 2 and then is taped by the tightening tape 5. When the prepreg 1 is wound around the core metal 4 an appropriate number of times, as shown in FIG. 4, a cutting line a inclined in the longitudinal direction of the sheet-like prepreg 1 in which high strength fibers are impregnated with synthetic resin.
Since the intersection change point α position of the other cutting line b and the other cutting line b is continuously cut at the curved cutting line d, the position becomes a gentle curve in the outer peripheral direction. The intersection change point β position between the cutting line a and the other cutting line c is also continuously cut along the curved cutting line e, so that it becomes a gentle curve in the outer peripheral direction.

After the prepreg 1 is wound around the cored bar 4 an appropriate number of times and taped by the tape 5, the cored bar 4 is placed in a heating furnace and integrally formed by thermosetting according to a conventional method. The rod tube 6 in FIG. 5 is obtained by pulling out the cored bar, peeling off the tape, and polishing the outer shape by a conventional method.

The prepreg 1 is made of, for example, a carbon fiber, a glass fiber, an aramid fiber, an alumina fiber, a Kepla fiber, a high strength fiber such as an organic fiber or an inorganic fiber, which is laterally woven into an epoxy resin or phenolic sheet. It is formed by impregnating a thermosetting synthetic resin such as resin or polyester resin.

In the present invention, as described above, in the cutting process of the prepreg 1, when the crossing change points α and β cannot be formed in the cutting line and the cutting line becomes a gentle curve in the outer circumferential direction when the prepreg 1 is wound, the tightening tape is tightened. Even if tension is applied by winding the roll 5, the tension is dispersed and it is difficult to form deviations, meanders, wrinkles and steps at the ends of the high-strength fiber 2. The strength of the rear rod tube 6 is improved, and it is less likely to be damaged. Furthermore, when the fishing rod is used, the bending balance is improved and the occurrence of bending is prevented, and even if a combined force of bending force and twisting force is applied, stress is dispersed and stress concentration does not occur in one place, so it is difficult to damage .

FIG. 6 is a modification of the prepreg, and FIG. 6 is a plan view of the prepreg.

In the modification of FIG. 6, the prepreg 1'is shown in FIG.
The prepreg 1 is formed so as to be substantially symmetrical in the vertical direction. That is, the crossing change point α position of the cutting line a inclined in the longitudinal direction on the lower side of the prepreg 1 ′ and the other cutting line b and the crossing change point β position of the cutting line a and the other cutting line c are respectively curved. The cutting lines d and e are continuously cut. Further, the crossing change point α position of the cutting line a ′ inclined to the longitudinal direction on the upper side of the prepreg 1 ′ and the other cutting line b ′, and the crossing change point β position of the cutting line a ′ and the other cutting line c ′, respectively. A curved cutting line d ',
It is continuously cut at e '. The effect of the modification of FIG. 6 is substantially the same as that of the case of FIG.

FIG. 7 is another modification of the prepreg, and FIG. 7 is a plan view of the prepreg.

In the modified example of FIG. 7, the prepreg 1 ″ is shown in FIG.
The prepreg 1 is formed in a shape in which a convex portion 1a is formed in the lower middle. In the prepreg 1 ″, the crossing change point α position of the cutting line a inclined in the longitudinal direction and the other cutting line b and the crossing change point β position of the cutting line a and the other cutting line c are respectively curved cutting lines d. , E, and cut line k.
And another cutting line m intersecting change point γ The cutting line n has a curved position
While being continuously cut at, the extended line of the curved cutting line d and the curved cutting line n are continuously cut. Further, the intersection change point δ position of the cutting line b and the cutting line m is continuously cut by the curved cutting line o, and the extension line of the curved cutting line n and the curved cutting line o are continuously cut. It has been disconnected.
That is, from the right side to the left side, a straight cutting line c, a curved cutting line e, a straight cutting line a, a curved cutting line d, a cutting line k, a curved cutting line n, and a curved cutting line e. The cutting line o and the straight cutting line b are continuously cut.

In the explanation of FIG. 2 above, also for the aligning sheet 3, the crossing change point position of the cutting line f inclined to the longitudinal direction and the other cutting line g, and the intersection of the cutting line f and the other cutting line h. Although the example in which the change point positions are continuously cut along the curved cutting lines i and j is shown, only the outer prepreg 1 is intersected at the crossing change point positions along the curved cutting lines. May be Further, in the above description, the prepreg 1 is described as an example in which the high-strength fiber is impregnated with the thermosetting synthetic resin. However, for example, polyether ether ketone (PEE) is used.
K), polyetherimide (PEI), polycarbonate
A prepreg impregnated with a thermoplastic resin such as PC (PC) may be used.

[0020]

Since the present invention is constructed as described above,
If there is no crossing change point in the cutting line in the cutting process of the prepreg and the cutting line becomes a gentle curve in the outer peripheral direction by winding the prepreg, even if tension is applied by winding the tightening tape,
Dispersion of tension makes it difficult to cause misalignment, meandering, wrinkling, or steps at the end of high-strength fiber, and it is not possible to form overlapping parts or parts without fibers, improving the strength of the rod tube after molding and making it difficult to break. Become. Furthermore, when the fishing rod is used, the bending balance is improved and the occurrence of bending is prevented, and even if a combined force of bending force and twisting force is applied, stress is dispersed and stress concentration does not occur in one place, so it is difficult to damage It is possible to provide a fishing rod having excellent effects.

[Brief description of drawings]

FIG. 1 is a plan view of a sheet-shaped prepreg.

FIG. 2 is a plan view of a cored bar, an alignment sheet and a sheet-shaped prepreg.

FIG. 3 is a plan view in which a prepreg wound around a cored bar is taped.

FIG. 4 is an enlarged plan view of an essential part of a prepreg wound around a cored bar.

FIG. 5 is a plan view of a molded fishing rod tube.

FIG. 6 is a plan view of a prepreg in a modified example.

FIG. 7 is a plan view of a prepreg in another modification.

FIG. 8 is a plan view of a conventional cored bar and a sheet-shaped prepreg.

FIG. 9 is an enlarged plan view of an essential part of a prepreg wound around a concentric bar.

[Explanation of symbols]

 1, 1 ', 1 "sheet-like prepreg 2 high-strength fibers a, a', f cutting lines inclined in the longitudinal direction b, c, g, h, k, m, b ', c'other cutting lines d, e, i, j, n, o, d ', e'curved cutting line α, β, γ, δ crossing change point

Claims (1)

[Claims] 1. A core bar after cutting a crossing change point position of a cutting line inclined in the longitudinal direction of a sheet-like prepreg in which high-strength fiber is impregnated with a synthetic resin with a cutting line of a curved line. A method for manufacturing a fishing rod, characterized in that the prepreg is wound around, taped, heated and fired, and then a core is drawn out and tape is peeled off by a conventional method.