JPH10271934A - Rod for fishing rod use - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rod structure for fishing rod use which is less prone to be bent or curved at the time of its molding. SOLUTION: This rod tube for fishing rod use comprises plural prepreg sheets that are obtained by winding a reinforced fiber impregnated with a synthetic resin. The plural prepreg sheets are each provided with a pair of auxiliary prepreg sheets 5, 6 in the form of a substantially right triangle, and these pairs of auxiliary prepreg sheets are arranged in such a manner that the respective diagonal sides thereof are opposed to each other so that each of the diagonal sides forms a spiral in reverse directions when wound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing rod, and more particularly, to a rod pipe for a fishing rod constituted by a prepreg sheet in which a reinforcing fiber is impregnated with a synthetic resin.

[0002]

2. Description of the Related Art Generally, a rod tube for a fishing rod is obtained by winding a prepreg sheet around a tapered core having a tapered shape, heating the prepreg sheet, and then decentering the core. The fishing rod is formed by adding a plurality of such rod pipes. In this case, the prepreg sheet wound around the core metal has various configurations depending on the use of the fishing rod, the required characteristics, the place where the rod tube is used, and the like. For example, the material of the reinforcing fiber in the prepreg sheet is used. Various configurations have been proposed for the resin impregnation amount, the number of windings on the core metal, the laminated structure of the tubular body, and the like.

In general, when a prepreg sheet is wound around a cored bar, a prepreg sheet (also referred to as a main body prepreg) is configured such that the number of turns on the rod tip side is equal to the number of turns on the base end side. ) Is used. However, if all the rod pipes are formed by such a main body prepreg, the rigidity of the rod tip side becomes too large,
The rigidity on the proximal end side is insufficient, and the rod tube cannot obtain a desired bent state as a fishing rod. Therefore, it is usually necessary that the rod tube for a fishing rod be configured so that the rigidity gradually decreases from the base end toward the rod tip.

[0004] Therefore, in addition to the main body prepreg, the prepreg sheet wound around the cored bar has a configuration in which the number of windings approaches zero as it goes to the pole tip (also referred to as an auxiliary prepreg). ) Is used. This auxiliary prepreg is usually formed in a triangular shape so that the base end side has one or two turns and the rod tip portion has almost zero turns.

[0005]

However, when the auxiliary prepreg having the above-described configuration is wound around a core metal together with the main body prepreg, the winding state is spiral, so that the thickness of the rod pipe in the circumferential direction is increased. A difference occurs in the thickness. On the rod pipe,
If there is such a difference in the thickness, the reinforcing fiber may be curved at the time of cooling after the heat molding, and the rod pipe itself may be curved in an arc shape or partially bent. That is, during the period from the heat molding step to the cooling step, a temperature difference occurs, and the resin thermally deforms (expands or contracts) due to the temperature difference.
If there is a difference in wall thickness due to the above-mentioned spiral in the rod pipe, a difference occurs in internal stress caused by thermal deformation, whereby the reinforcing fiber is easily deformed, and the finally formed rod pipe is curved. Or bent. Such a curve or bend tends to occur particularly in a rod pipe having a small diameter such as a tip.

The present invention relates to a fishing rod for a fishing rod comprising the above-described triangular auxiliary prepreg,
An object of the present invention is to provide a rod pipe for a fishing rod having a structure that is unlikely to be bent or bent during molding.

[0007]

In order to solve the above-mentioned problems, a rod pipe for a fishing rod according to the present invention is configured by winding a plurality of prepreg sheets in which a reinforcing fiber is impregnated with a synthetic resin. The prepreg sheet includes a pair of substantially right triangle triangular auxiliary prepreg sheets, and the pair of auxiliary prepreg sheets are arranged so that their inclined portions are opposed to each other, so that the auxiliary prepreg sheets are in a spiral state in the opposite direction. It is characterized by being wound around.

The above-mentioned auxiliary prepreg sheet having a substantially right-angled triangular shape has a characteristic that the rigidity is large at the base end side of the rod tube to be formed, and the rigidity is gradually reduced toward the distal end side (at the distal end side of the rod tube). Gives flexibility and hardens the base to improve the balance of tone). At least one set of the auxiliary prepreg sheets is provided, and the inclined portions are arranged so as to face each other, so that the auxiliary prepreg sheets are spirally wound from both directions. As described above, since the coil is spirally wound from both directions, the influence on the bending and the like due to the change in the thickness is offset in the axial length direction, so that the rod as a whole is hardly bent or bent. Become.

[0009]

[Summary of the Invention] The features of the present invention are that the shape, arrangement, and winding state of the auxiliary prepreg sheet that gives characteristics of decreasing rigidity from the base end side to the distal end side of the formed rod pipe are described. There are features. Accordingly, for prepreg sheets (such as main body prepreg) other than the auxiliary prepreg sheet providing such properties, the arrangement of the reinforcing fibers, the type thereof, the resin impregnation amount, the thickness, and the like are as follows.
It is variously modified in accordance with the use of the fishing rod, the required characteristics of the use, and the like, and is not limited.

[0010] Further, the above-mentioned auxiliary prepreg sheet,
At least one set is provided, each of which has a substantially right-angled triangular shape so as to provide the above-described characteristics. In this case, by making the auxiliary prepreg sheet a substantially right triangle,
The direction of the reinforcing fiber is the direction along the axis of the rod pipe, so that the bending elasticity can be increased and the helical bending can be prevented. Then, a set of such auxiliary prepreg sheets is provided and wound around a cored bar in a state where the inclined portions are opposed to each other, whereby a symmetric spiral wound state in which the directions are opposite to each other is obtained. In addition, the substantially right-angled triangular shape is, of course, an accurate right-angled triangle, as long as the fiber as described above can be oriented in the axial direction. Is also good. Also, one set of auxiliary prepreg sheets may be wound in a state of being stacked in advance,
It may be wound individually one by one. Therefore, a main body prepreg may be interposed between the auxiliary prepreg sheets.

Further, one set of auxiliary prepreg sheets is
If they are made to have the same shape and the same configuration, and they are wound around the cored bar so that they are exactly overlapped with each other, each spiral state can be made exactly symmetrical, thereby being spirally wound. It is most preferable because the factors of bending caused by the auxiliary prepreg sheets generated in each other can be canceled out. However, even if the set of auxiliary prepreg sheets have different lengths in the axial direction or have slightly different shapes, good. That is, if the inclined portions of the auxiliary prepreg sheets are arranged so as to face each other, and the spiral direction when wound is opposite, the factors of bending can be canceled out, so that the shapes of the mutual prepreg sheets are slightly different. Is also good.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. (Embodiment 1) FIG. 1 is a diagram showing an example of an arrangement configuration of a prepreg sheet wound around a cored bar 1. According to a conventional method, the rod tube for a fishing rod superimposes the main body prepreg 2, one set of auxiliary prepregs 5 and 6, the main body prepreg 8, and the auxiliary prepreg 9 for the joint portion on the core metal 1 in this order. After winding, and then wrapping cellophane tape on it and stabilizing it, thermosetting the synthetic resin in a heating furnace, and after cooling, de-core, peel off cellophane tape, polishing and painting And so on. The portion indicated by the length 1 of the cored bar 1 is a portion that is actually used as a rod tube, and the other winding portions are cut allowances.

The innermost prepreg 2, which is the innermost layer, is cut so that the number of turns (1 to 2 plies) is equal to the number of turns (1 to 2 plies) with respect to the cored bar 1 at the front side and the base side. Prepreg sheet 2 with thickness of 0.1mm or less
a, a woven cloth 2b having a thickness of 0.03 mm or less, such as a glass scrim sheet, is lined.

Each of the auxiliary prepregs 5 and 6 is formed in a right-angled triangular shape so that the base metal 1 is usually 1-2 plies on the base end side and 0 plies at the tip end. It is cut in the shape of. Each of the auxiliary prepregs 5 and 6 has a carbon fiber aligned in the axial direction, and has a thickness of 0.
08 mm or less, preferably 0.06 mm or less. In this case, the thickness difference between the auxiliary prepreg 5 and the auxiliary prepreg 6 is ± 0.06 mm or less, preferably ± 0.06 mm.
The thickness is preferably 4 mm or less, and most preferably the same thickness. Further, for the purpose of suppressing the meandering of the main body fibers, it is preferable to make the thickness smaller than that of the main body prepreg 2. further,
The average amount of synthetic resin impregnated in the auxiliary prepregs 5 and 6 is set so that the movement of the fibers during molding is suppressed and bending is hardly caused.
It is preferable to make it lower than the main body prepreg 2.

The auxiliary prepregs 5, 6 are arranged so that their inclined portions are opposed to each other. The auxiliary prepregs 5, 6 are wound around the cored bar 1 with the inclined portions facing each other. in this case,
Each of the auxiliary prepregs 5 and 6 may be partially overlapped and wound around the core 1, but the top 5 a and the top 6 b and the top 5 b and the top 6 a coincide with each other at the base end side and wound around the core 1. Most preferably, it is turned.

The main body prepreg 8, which is the outermost layer side, is cut so as to have the same number of turns (1-2 plies) on the front side and the base side with respect to the cored bar 1, and has a thickness of 0.1 mm. It is composed of a glass scrim sheet of 1 mm or less. At the base end of the outer layer of the main body prepreg 8, an auxiliary prepreg 9 for a joint portion in which carbon fibers are aligned in the axial direction is provided.
Will be plied.

The auxiliary prepregs 5, 6 in which the inclined portions face each other are preferably provided as an intermediate layer of the rod tube as in this embodiment. This is because the outer layer and the inner layer are easily affected by bending.

FIG. 2 shows the configuration of a rod tube formed by the above-described configuration example of the prepreg sheet shown in FIG.
As described above, the set of auxiliary prepregs 5 and 6 have the same shape and the same configuration as each other, and are wound around the cored bar 1 such that the inclined portions are opposed to each other and that they are exactly overlapped with each other. Thus, the auxiliary prepregs 5, 6 are spirally symmetrically wound from both directions. In the axial direction,
The positions of the tip positions 5c and 6c of the respective auxiliary prepregs coincide with each other.

As described above, when the auxiliary prepreg is in a spirally wound state, a thickness difference occurs in the rod pipe, and the thickness difference is caused by an internal temperature difference due to a temperature difference in a cooling step after heat molding. This causes a difference in stress and causes the rod tube itself to bend or bend in an arcuate manner. However, another auxiliary prepreg causing such a factor is provided, and these inclined portions are opposed to each other. Is wound so as to be accurately overlapped with each other, whereby the cause of bending due to the auxiliary prepreg in the spiral state can be offset, and the rod, which is finally formed, can be prevented from being bent or bent. it can. (Embodiment 2) The embodiment shown in FIG. 3 is a configuration example in which the shape of each sheet of a set of auxiliary prepregs is modified.
As described above, the auxiliary prepregs preferably have the same shape and configuration as each other, but may have slightly different shapes as described below in detail.

As shown in the figure, each auxiliary prepreg 15,
The axial length of 16 may be slightly different. In this case, assuming that the difference between the lengths is d, the effect of canceling out the above-mentioned bending factors is obtained within ± 25% of the length of the long auxiliary prepreg 15.

Each of the auxiliary prepregs 15 and 16 does not have to be an accurate right triangle, and the auxiliary prepregs 16 and 16 shown in FIG.
A trapezoidal shape in which a parallel portion 16p is formed partially may be used. In addition, according to this configuration, the number of turns of each of the auxiliary prepregs 15 and 16 on the base end side is different, but such a difference in the number of turns is preferably less than one ply.

Thus, each of the auxiliary prepregs 15, 16
Even if the shapes of the auxiliary prepregs are slightly different from each other, even if the auxiliary prepregs are helically wound from both directions with the inclined portions facing each other, the factors of the bending can be canceled each other. Although not shown, it is more preferable that the auxiliary prepreg 15 has the same shape as the auxiliary prepreg 16.

Further, the main body prepreg 18 disposed on the outermost layer side of this embodiment is composed of a prepreg sheet 18a in which carbon fibers are aligned in the axial direction and a prepreg sheet 18b in which carbon fibers are aligned in the circumferential direction. It is constituted by that. Thus, the configuration of the main body prepreg can be variously modified. (Embodiment 3) The embodiment shown in FIG. 4 is a configuration example in which a main body prepreg 20 is interposed between a pair of auxiliary prepregs 5 and 6 in the embodiment shown in FIG. As shown in FIG. 1, the auxiliary prepregs 5 and 6 are preferably wound in a state of being superposed on each other, but as shown in this embodiment, a main body prepreg 20 is interposed therebetween. Is also good. The configuration of the main body prepreg interposed therebetween can be variously modified. In this embodiment, a prepreg sheet 20a in which carbon fibers are aligned in the circumferential direction, and a prepreg in which carbon fibers are aligned in the axial direction. It is configured by stacking the sheets 20b.

Thus, one set of auxiliary prepregs 5, 6
Even if they are not superposed on each other, as a result, they are spirally wound from both sides, so that the bending factors of the auxiliary prepregs 5 and 6 can be offset each other.

[0025]

As described above, the rod tube 1 is constructed as follows.
Since the set of substantially right-angled triangular auxiliary prepregs is spirally wound from both directions, the influence of bending due to the change in wall thickness is offset during molding, and bending or bending occurs as a rod pipe plug. Is prevented. Further, by using such an auxiliary prepreg, the rigidity of the front side is flexible, the rigidity of the base side is increased, and the rod tube has improved overall balance and strength balance.

[Brief description of the drawings]

FIG. 1 shows the first embodiment and is a diagram showing an example of an arrangement configuration of a prepreg sheet wound around a cored bar.

FIG. 2 is a view showing a configuration of a rod tube formed by the example of the arrangement configuration of the prepreg sheet shown in FIG. 1;

FIG. 3 is a view showing the second embodiment, and showing an example of an arrangement configuration of a prepreg sheet wound around a cored bar.

FIG. 4 is a view showing a third embodiment and showing an example of an arrangement configuration of a prepreg sheet wound around a cored bar.

[Explanation of symbols]

 Reference Signs List 1 core metal 2 main body prepreg 5, 6 auxiliary prepreg 8 main body prepreg 9 auxiliary prepreg (for joining)

Claims (1)

[Claims] 1. A rod pipe for a fishing rod formed by winding a plurality of prepreg sheets in which a reinforcing fiber is impregnated with a synthetic resin, wherein the plurality of prepreg sheets include a set of substantially right-angled triangular auxiliary prepreg sheets. And a pair of auxiliary prepreg sheets, wherein the inclined portions are arranged so as to face each other, and are wound so as to form a spiral state in the opposite direction.