JPH0526451B2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The present invention relates to a fishing rod used for fishing.

(Prior art) Currently, most fishing rods use drawn prepreg, which is a drawn sheet of high-strength fibers impregnated with synthetic resin, and the drawn prepreg is wound so that the high-strength fibers are oriented in the circumferential direction. After that, the aligned prepreg is wound around the outer periphery of the inner layer so that its high-strength fibers are oriented in the length direction to form an outer layer. By doing this, the high-strength fibers, which are lightweight and have high tensile strength, are tensioned and a high-strength fishing rod can be manufactured. When cellophane tape B is wrapped and tied around the outer periphery of the outer layer of the rod body A, a shearing force perpendicular to the length direction of the outer high-strength fibers acts on the high-strength fibers C of the outer layer. For this reason, the high-strength fibers of the outer layer are cut.

When wrapping the cellophane tape around the rod body, it is unfired and not hardened and is in a soft state. Therefore, when the cellophane tape is wrapped and tied so that the ends in the width direction are overlapped, as shown in Fig. 6. As shown in , the inner part of the overlapping part is bound by the outer part of the overlapping part, and a larger binding force acts on the inner edge b of the overlapping part than the other plane parts excluding the inner edge b of the overlapping part, Therefore, even if there is a core bar on the center side, the high-strength fibers in the part bound by the inner edge b of the overlapping part are strongly pressed against the part bound by the plane part in the direction of the binding force. In other words, a very large shearing force perpendicular to the length direction of the high-strength fiber acts, and this shearing force causes
The high-strength fibers, which originally have low resistance to loads perpendicular to the length direction, are cut.

High-strength fibers whose inner layer is oriented in the circumferential direction have a large repulsive force, so this repulsive force causes the outer layer to be spread out before the cellophane tape is wrapped around it, and there is a gap between the outer layer and the inner layer or between the outer layers. A gap may occur, and when the cellophane tape is wrapped around the outer periphery of the outer layer and bound in this state, the high-strength fibers in the portion bound by the inner edge b of the overlapped portion of the cellophane tape The planar portion tends to be displaced excessively in the direction of action of the binding force relative to the part that is bound, and is likely to be cut by the shearing force caused by the binding.

When the high-strength fibers are cut as described above, a part where the high-strength fibers are shredded is created in the middle part of the rod body in the length direction, and the strength is extremely reduced. There is a problem with it being easy to break.

(Object of the Invention) The object of the present invention is to form an aligned sheet in which aligned high-strength fibers are impregnated with a synthetic resin, and to shear the aligned sheet in a direction perpendicular to the length direction of the high-strength fibers. By wrapping the outer layer of the rod body so that no force is applied, it is possible to prevent the high-strength fibers from being cut due to the binding force of the cellophane tape.

(Structure of the Invention) Accordingly, the structure of the present invention is to form an inner layer by winding a prepreg in which aligned high-strength fibers are impregnated with a synthetic resin so that the high-strength fibers are oriented in the circumferential direction. The fishing rod is made by winding around the outer periphery a prepreg made of aligned high-strength fibers impregnated with a synthetic resin so that the high-strength fibers are oriented in the length direction to form an outer layer, and then pressurized and fired. A stretched sheet made of high-strength fibers impregnated with a synthetic resin is placed around the entire outer periphery of the rod body formed by winding the prepreg, and the high-strength fibers of the sheet intersect with the center of the rod body, In addition, the high-strength fibers of the outer layer are not cut even if the cellophane tape is wound in a conventional manner by winding the cellophane tape in a direction not perpendicular to the cellophane tape used for binding during pressure firing.

(Example) In the figure, 1 is a rod body formed by winding a prepreg 2 in which high-strength fibers 2a such as carbon fibers and glass fibers are impregnated with synthetic resin.

Moreover, this rod body 1 consists of an inner layer and an outer layer,
The inner layer is formed by winding the prepreg 2 so that its high-strength fibers 2a are oriented in the circumferential direction, and the outer layer is formed by winding the prepreg 2 so that its high-strength fibers 2a are oriented in the length direction. It is formed by winding it up.

As shown in FIG. 1 and in a direction that is not perpendicular to the cellophane tape that binds during pressure firing.

The sheet 3 is wrapped so that the high-strength fibers 3a intersect with the center O of the rod body 1 at an angle of 3 to 90 degrees, and is wrapped around a cellophane tape 4 for binding the rod body 1. The high-strength fibers 3a should not intersect perpendicularly, but preferably at an angle of 5 to 10 degrees with respect to the center O.

Also, this sheet 3 is attached to the rod body 1 as shown in Fig. 4.
The high strength fiber 3a has the same length as that of
is cut into a thin strip so that it is inclined to the long side 3b, and one ply is wound in a cylindrical shape with the long side 3b along the outer periphery of the rod body 1. It may be formed into a shape and wound spirally.

Further, the sheet 3 is formed to have a thin plate thickness of about 0.03 m/m and is wound with at least one ply, but may be wound with two or more other plies.
In this case, for each ply, the high strength fiber 3a
The winding is done so that the orientation direction is opposite.

This has the advantage of further increasing torsional strength.

The rod body 1 wrapped with the alignment sheet 3 as described above
As shown in FIG. 5, cellophane tape 4 is spirally wrapped around the outer periphery of the rod to bind it tightly, and the synthetic resin in the layer of the sheet 3 and the rod body 1 is cured by heating and baking in a heating furnace. After that, the cellophane tape 4 is peeled off.

Thus, the cellophane tape 4 is wound spirally so that its ends in the width direction overlap, but the high-strength fibers 3a of the alignment sheet 3 wrapped around the outer periphery of the rod body 1 are Since it intersects with the center O of the rod body 1 and is not perpendicular to the cellophane tape 4, when the cellophane tape 4 is wrapped, the inner edge of the overlapping portion of the cellophane tape 4 Even if a larger binding force is applied to the inner edge 4a than other parts except for the inner edge 4a, shearing force perpendicular to the cellophane tape 4 can be prevented from acting on the high-strength fibers 3a of the sheet 3. be.

Therefore, it is possible to avoid the situation where the high-strength fibers 3a of the sheet 3 are cut due to the binding force of the cellophane tape 4.

(Effects of the Invention) As described above, according to the present invention, although the rod body is formed by winding prepreg impregnated with synthetic resin around aligned high-strength fibers, the outer periphery of the rod body is The high-strength fibers of the sheet
Because it was wrapped in a direction that intersected the center of the rod body and was not perpendicular to the cellophane tape,
Even if the cellophane tape is wrapped and tied so that the ends in the width direction overlap, the high-strength fibers of the aligned sheet that come into contact with the cellophane tape will not be perpendicular to the length direction of the high-strength fibers. This makes it possible to avoid a situation in which shearing force acts on the high-strength fibers due to the binding of the cellophane tape, and to prevent the high-strength fibers from being cut in the circumferential direction and the high-strength fibers to This, combined with the provision of an outer layer that is oriented toward the surface, makes it possible to create a fishing rod with extremely high strength.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the fishing rod of the present invention;
Figure 2 is a front view of the rod body only, Figure 3 is an explanatory diagram of the prepreg only, Figure 4 is an explanatory diagram of the alignment sheet only, Figure 5 is an explanatory diagram when winding cellophane tape, Figure 6 FIG. 2 is an explanatory diagram showing a conventional example. 1... Rod body, 2... Prepreg, 3... Alignment sheet, 3a... High strength fiber, O... Center of the rod body.

Claims (1)

[Claims] 1. A prepreg in which aligned high-strength fibers are impregnated with synthetic resin is wound so that the high-strength fibers are oriented in the circumferential direction to form an inner layer, and the aligned high-strength fibers are impregnated with synthetic resin around the outer periphery of this inner layer. A fishing rod is made by winding a prepreg impregnated with the above prepreg so that its high-strength fibers are oriented in the length direction to form an outer layer and firing under pressure. A cellophane tape is used to bind an aligned sheet in which the aligned high-strength fibers are impregnated with a synthetic resin so that the high-strength fibers of the sheet intersect with the center of the rod body and are bound during the pressure firing. A fishing rod characterized by being wound in a direction that is not orthogonal to the rod.