JP3567075B2 - fishing rod - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a fishing rod constituted by aligning reinforcing fibers and winding a so-called prepreg impregnated with a synthetic resin.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, fishing rods are configured by joining rod pipes having different diameters as seen in a joint type, a swing type, and the like. For example, as shown in JP-A-6-225669 and JP-B-8-432, each rod pipe has a thin inner wall and reinforcing fibers are arranged in the circumferential direction to improve the strength. Circumferential prepreg, middle-thick prepreg with thicker reinforcing fibers aligned in the axial direction in the middle, and outer circumferential prepreg with thinner reinforcing fibers aligned in the circumferential direction on the outside It is common to configure it.
[0003]
That is, the rod pipe is formed by winding the circumferential prepreg, the axial prepreg, and the circumferential prepreg in this order on a cored bar, fixing this by taping, and then performing a thermosetting treatment, decentering, tape peeling, and polishing. And so on. Then, as described above, when winding the prepreg on the cored bar, each prepreg is wound for each ply, or a plurality of prepregs are preliminarily superimposed and wound. Has been done.
[0004]
By the way, when a prepreg is wound around a cored bar, the portion to be overlapped inevitably becomes thicker, and the finally formed rod pipe has a partially convex portion in the circumferential direction. As a result, variations in strength and differences in rigidity occur in the circumferential direction. Therefore, a fishing rod in which such a rod pipe is added has a poor balance in terms of strength and rigidity as a whole, and also has a poor balance in directionality.
[0005]
For this reason, the prepreg wound around the cored bar is cut so that the ends are abutted at the time of winding, that is, the overlapping margin is zero, or the prepreg is wound every one ply. It is known that the overlapping portion is shifted in the circumferential direction to disperse the convex portions.
[0006]
[Problems to be solved by the invention]
However, it is difficult to cut the prepreg so that the ends are abutted at the time of winding because of manufacturing errors, mass productivity, etc., and as a result, the ends do not abut, as described above. Variations occur in strength and rigidity. Also, dispersing the overlap margin portion in the circumferential direction is relatively effective when the resin impregnation amount of the prepreg before molding is relatively large (30 wt% or more), but it is effective in reducing the weight and thickness of the fishing rod as a whole. It is not preferable to use a prepreg having a low resin impregnation amount (based on a resin impregnation amount after molding of 23 wt% or less). That is, if the resin impregnation amount of the prepreg is large, it is considered that the resin flows in the overlap margin portion during the thermosetting treatment and the wall thickness in that portion is averaged, but if the resin impregnation amount is small, the overlap margin is considered. This is because the resin flow in the portion is small, and the thickness difference of the prepreg is generated as it is.
[0007]
Therefore, in the fishing rod of the conventional configuration, even if each rod tube has a convex portion which partially extends in the axial direction in the circumferential direction, or even if such a convex portion is somewhat relaxed. , As a whole, is composed of a rod tube with a large amount of resin impregnation.
[0008]
The present invention has been made based on the above-described problem, and improves roundness by eliminating a convex portion formed to partially project in the circumferential direction of a rod tube, and has no variation in strength and rigidity. The purpose is to provide a fishing rod. Still another object of the present invention is to provide a fishing rod having a rod with improved roundness even when a prepreg having a small resin impregnation amount is used.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a fishing rod of the present invention has a rod tube in which a circumferential prepreg is wound on an inner layer, an axial prepreg mainly composed of axial fibers is placed on an intermediate layer, and a circumferential prepreg is wound on an outer layer. A fishing rod, wherein the circumferential prepreg is configured to have a width such that ends thereof overlap when one ply is applied, and the axial prepreg has a width shorter than the circumferential prepreg; its ends overlapping margin Do circumference of less than 6% by -1.0~3mm between, or to form a thinner thin-walled portion toward the tip at each end, becomes heavy at its thin-walled portion The intermediate layer is arranged on the outer layer side of the circumferential prepreg of the inner layer and on the inner layer side of the circumferential prepreg of the outer layer. Parts are circumferential Whether a butt-like across the prepreg, or characterized by being formed by a plurality of axial direction prepreg overlap each other in the thin-walled portion.
[0010]
In this manner, the ends of the axial prepregs are arranged so as to be abutted (may be slightly spaced) or to overlap each other at a thin and thick portion , and to partially overlap the circumferential prepregs. However, by winding these integrally, the thickness increase at the winding end can be suppressed as much as possible.
[0011]
Further, it is preferable that the plurality of axial prepregs have a large resin impregnation amount on the inner layer side.
[0012]
As described above, by increasing the amount of resin impregnation on the inner layer side in the axial length prepreg constituting the intermediate layer, the outer layer side is more likely to bite due to the resin flow at the time of the thermosetting treatment, and the protrusions generated at the overlap allowance portion are reduced. It can be suppressed as much as possible.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a partial cross-sectional view of a rod tube 1 constituting a fishing rod, and FIG. 1B is a cross-sectional view taken along line bb of FIG. 1A. The rod tube 1 is formed by winding an inner layer 10 and an outer layer 30 each formed by winding a circumferential prepreg in which reinforcing fibers are aligned in the circumferential direction, and an axial prepreg in which reinforcing fibers are aligned in the axial direction. Is formed of the intermediate layer 20 configured as described above.
[0014]
In addition, a prepreg 2 for reinforcement is wound on the outer layer at the distal end of each rod tube in order to prevent cracks or the like at the distal end portion. A prepreg 3 for forming a joint portion is wound so as to be formed. The prepreg 2 preferably has a structure in which the main fiber direction is aligned in the circumferential direction and the resin impregnation amount is 28 wt% or more. Further, it is preferable that the prepreg 3 has a configuration in which reinforcing fibers are aligned in the circumferential direction or the axial direction or formed into a woven fabric, and the resin impregnation amount is 25 wt% or more.
[0015]
The circumferential prepreg constituting the inner layer 10 and the outer layer 30 has a thickness of about 0.01 to 0.06 mm, and is provided as a single ply (a plurality of layers may be superposed). The axial length prepreg constituting the intermediate layer 20 has a thickness of about 0.02 to 0.2 mm, and a single layer or a plurality of layers are superposed and one ply is formed. In addition, the axial length prepreg constituting the intermediate layer may be provided with an extremely thin backing sheet, for example, in order to prevent the unidirectional fiber from scattering or opening, and therefore, the intermediate layer has an axial length of What is necessary is just to comprise a direction fiber mainly.
[0016]
As shown in FIGS. 2 and 3, the circumferential prepreg 11 constituting the inner layer 10 has a width of about one ply with respect to the core metal M, and is actually in a state of being plied by one ply. In this case, a single layer is formed so that the ends thereof overlap each other, specifically, within a range of 1 to 5 (preferably 3) mm. Similarly, the circumferential prepreg 31 constituting the outer layer 30 also has a width of about one ply with respect to the core metal M, and is actually in a state of being plyed from above the intermediate layer by one ply. It is formed in a single layer so that the ends overlap each other, specifically, within a range of 1 to 5 (preferably 3) mm. The overlap margin of the circumferential prepregs 11 and 31 is set in the above range because, when the overlap margin is shorter than 1 mm, the overlap margin is reduced and a tear or the like easily occurs. When the overlap margin is longer than 5 mm, a thick region is generated. Because it becomes easy. The overlapping portions (both ends) of the prepregs 11 and 31 are preferably formed to be thinner toward the tip.
[0017]
As shown in FIG. 3, the axial length prepregs constituting the intermediate layer 20 are disposed on the outer layer side of the circumferential prepreg 11 and on the inner layer side of the circumferential prepreg 31, respectively. And are wound separately. In this case, the axial prepreg 21 disposed on the outer layer side of the circumferential prepreg 11 has a configuration in which two layers are superposed, and the axial prepreg 22 disposed on the inner layer side of the circumferential prepreg 31 is a single layer. It is composed of layers. Note that these prepregs 21, 21, 22 may be separately wound.
[0018]
Each of the axial prepregs 21 and 22 has a width such that the prepregs 21 and 22 are plied to the core metal M by one ply, and is shorter than the circumferential prepregs 11 and 31 described above. In practice, it is most preferable that the butt is formed in a one-ply state, but the overlap between the ends may be 1.0 or less, and 3 mm or less. % Or less (6% or less of the circumference at −1.0 to 3 mm). If the interval is 1 mm or more, cracks occur due to the generation of thin and thick portions, and if the overlap is 3 mm and exceeds 6% of the circumference, the thickness becomes prominent.
[0019]
Alternatively, as shown in FIG. 2, each end of the prepregs 21 and 31 may be configured to be thinner toward the tip, so that both end regions are overlapped. When the end regions overlap each other in this manner, the overlapping range is preferably 5 mm or less, and more preferably 3 mm or less, due to workability and quality stabilization.
[0020]
When each prepreg having the above-described configuration is wound around the core metal M, two winding end regions (overlapping regions) of the prepreg are generated. Such a configuration (indicated by reference numerals A and B). Are preferably different from each other in the circumferential direction. For example, as shown in the drawing, the positions are shifted from each other by 90 degrees. As described above, in order to shift the overlapping region , the winding start position P2 of the prepreg on the outer layer side may be shifted by 90 degrees in the circumferential direction with respect to the winding start position P1 of the prepreg on the inner layer side.
[0021]
In each of the winding end regions A and B, due to the above-described configuration, each end overlaps when the thin-walled circumferential prepregs 11 and 31 make one ply, and the thick axial-length prepregs 21 and 22 are respectively formed. In the end region, the thinned portions overlap each other.
[0022]
With such a configuration, the thickness at the overlapping portion at the winding end can be reduced, and the roundness of the rod tube molded after the thermosetting treatment increases. In particular, even if the resin impregnation amount of the prepreg in the axial direction is reduced for the purpose of weight reduction (prepreg in which the resin impregnation amount after molding is 23 wt% or less), the appearance of the projections in the regions A and B is suppressed. Thus, it is possible to obtain a fishing rod that achieves weight reduction and is excellent in strength and rigidity balance.
[0023]
Next, another embodiment of the present invention will be described.
As described above, among the layers constituting the rod pipe, the intermediate layer is, as shown in the figure, a prepreg in which reinforcing fibers are aligned in the axial direction (the axial prepreg may be mainly used). ) May be laminated in multiple layers. In such a configuration, by increasing the resin impregnation amount of the prepreg in the axial direction on the inner layer side, it is possible to improve the roundness by minimizing the convex portion at the overlap margin. Needless to say, in this configuration, the overlap between the ends of the axial prepreg is set to -1.0 to 3 mm and 6% or less of the circumference, or the end of the axial prepreg is made thin, and both ends are formed. It is preferable to adopt a configuration in which the regions are overlapped.
[0024]
This is because if the resin impregnation amount of the prepreg disposed inside is high, the prepreg on the outer layer side tends to bite into the inner layer side due to the resin flow during the thermosetting treatment, and the thickness tends to be uniform. Actually, if the resin impregnation amount of the axial prepreg used on the inner layer side is set to be about 5 to 15 (20)% higher than the axial prepreg used on the outer layer side, true The roundness can be improved.
[0025]
Note that such a configuration can be applied to the above-described embodiment. In the configurations illustrated in FIGS. 2 and 3, the resin impregnation amount of the axial-length prepreg 21 that is the inner layer side is different from that of the outer layer side. It may be set higher than the resin impregnation amount of the axial length prepreg 22. Further, in such a configuration, when increasing the resin impregnation amount of the prepreg 21 on the inner layer side, the total thickness of the prepreg 21 with the prepreg 22 on the outer layer side (the total layer thickness of the prepregs in the axial direction) is larger. It is preferable that the thickness ratio be in the range of 20% to 70%. By setting such a range, weight reduction and roundness can be improved in a well-balanced manner.
[0026]
As described above, the embodiments of the present invention have been described, but the present invention is characterized by the overlapping portions of the prepregs constituting the rod tube of the fishing rod, and the thickness, the number of layers, the resin impregnation amount of the prepreg actually used, The elastic modulus of the reinforcing fiber and the like can be variously changed depending on the required characteristics of the fishing rod used and the position of the rod tube. For example, in the embodiment described above, by setting the resin impregnation amount of the entire prepreg (or the entire main body layer) constituting the rod pipe to 10 to 25% by weight, the strength and rigidity balance are excellent, and the specific strength and the specific strength are further improved. A fishing rod having improved stiffness and excellent operability can be obtained.
[0027]
【The invention's effect】
As described above, according to the present invention, the ends of the plurality of axial prepregs forming the intermediate layer are abutted with each other across the circumferential prepreg, or are overlapped with each other at the thin thick portion, While preventing cracks due to the occurrence of thin-walled portions, there is no protrusion that is partially formed in the circumferential direction of the rod tube, improving roundness and achieving a fishing rod with no variation in strength and rigidity. Can be
[Brief description of the drawings]
1A is a partial longitudinal sectional view of a rod tube constituting a fishing rod, and FIG. 1B is a sectional view taken along line bb in FIG. 1A.
FIG. 2 is a view showing a laminated structure of prepregs constituting a rod pipe.
FIG. 3 is a diagram showing an example of a configuration of a prepreg for obtaining a laminated structure as shown in FIG. 2 and a method of winding a core metal.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rod pipe 10 Inner layer 11 Circumferential prepreg 20 Intermediate layers 21 and 22 Axial prepreg 30 Outer layer 31 Circumferential prepreg

Claims (4)

A circumferential direction prepreg in the inner layer, an axial direction prepreg mainly composed of the axial direction fibers in the intermediate layer, a fishing rod having a rod tube wound with the circumferential direction prepreg in the outer layer,
The circumferential prepreg has a width such that ends thereof overlap when one ply is made, and the axial prepreg has a shorter width than the circumferential prepreg. overlapping margin Do circumference of 6% or less in -1.0~3mm of, or to form a thinner thin-walled portion toward the tip at each end, is configured to heavy made at the thin wall thickness portion And
The intermediate layer is disposed on the outer layer side of the inner circumferential prepreg and on the inner layer side of the outer circumferential prepreg, and when wound together with the respective circumferential prepregs, ends thereof form the circumferential prepreg. A fishing rod characterized by being abutted with each other or formed of a plurality of axial prepregs overlapping with each other at a thin and thick portion . The fishing rod according to claim 1, wherein the axial length prepreg forming the rod pipe has a resin impregnation amount of 23 wt% or less. The fishing rod according to claim 1, wherein the plurality of axial prepregs have a large amount of resin impregnation on the inner layer side. The fishing rod according to any one of claims 1 to 3, wherein the entire resin impregnation amount of each layer constituting the rod tube is 10 wt% to 25 wt%.

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