JP3880385B2 - fishing rod - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fishing rod using a material reinforced with reinforcing fibers using a thermosetting resin or a thermoplastic resin as a matrix.
[0002]
[Prior art]
Currently, fishing rods, golf club shafts, ski stocks, bicycle frames, tubular bodies for badminton and tennis rackets are required to have high elasticity, high strength, etc., so thermosetting resins or thermoplastic resins A tubular body formed by winding a material reinforced with reinforced fibers, a so-called fiber reinforced prepreg, is used.
[0003]
This tubular body is usually produced by winding a fiber-reinforced prepreg around a mandrel a predetermined number of times, subjecting it to heat treatment, cooling it, and removing the mandrel. The tubular body used for the above applications is sufficiently long with respect to its diameter, so if thermal stress is applied due to the temperature difference between heating and cooling in manufacturing, slight variations in thickness and density of reinforcing fibers Bending occurs due to variations.
[0004]
If bending occurs in the manufacture of the tubular body in this way, it is not preferable because anisotropy can be produced in properties such as strength. Therefore, it is necessary to correct the bending after manufacturing the tubular body. Such a bending correction process leads to an increase in manufacturing cost, which is not preferable.
[0005]
[Problems to be solved by the invention]
Conventionally, there are techniques disclosed in Japanese Patent Application Laid-Open Nos. 54-91571 and 56-2123 as methods for correcting bending during the production of a tubular body. These techniques correct the bend using a correction jig when manufacturing the tubular body. However, the manufacturing process becomes complicated, the manufacturing cost increases, and the effect of correcting the bend is insufficient.
[0006]
This invention is made | formed in view of this point, and it aims at providing the fishing rod which eases the bending which arises at the time of manufacture, and exhibits the outstanding performance.
[0007]
[Means for Solving the Problems]
The present invention is a fishing rod formed by winding a fiber reinforced prepreg obtained by impregnating a reinforcing fiber aligned in a specific direction with a resin, and the reinforcing fiber is inclined with respect to the axial length direction of the fishing rod. And the angle of the reinforcing fiber fiber direction with respect to the axial length direction of the fishing rod is 5 ° or less, which is smaller than the rod side of the fishing rod. Provided is a fishing rod characterized in that the front side is relatively large.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
[0011]
The inventor diligently studied the bending that occurs in the production of a tubular body formed by winding a fiber-reinforced prepreg obtained by impregnating a reinforcing fiber aligned in a specific direction with resin, and researched a means for relaxing the bending. Various means have been found. The means will be described below.
[0012]
FIG. 1 is a cross-sectional view showing a tubular body according to a reference example. In the figure, reference numerals 1a and 1b denote tubular body bodies. The tubular body main bodies 1a and 1b are constituted by fiber reinforced prepregs. Fiber reinforced prepreg is made by impregnating resin into reinforced fibers aligned in a specific direction. Carbon fiber, glass fiber, alumina fiber, aramid fiber, etc. should be used as the reinforced fiber constituting the fiber reinforced prepreg. As the resin to be impregnated, epoxy resin, phenol resin, polyester resin, or the like can be used. FIG. 1 shows a case where carbon fiber having an elastic modulus of 30 tons or less and a positive linear expansion coefficient is used.
[0013]
A resin layer is formed on the tubular body. At this time, a resin layer 2a is formed on the side 1a that is relatively far from the virtual center point (the virtual point that exists in the direction of the arrow in the figure) of the bending that occurs during the production of the tubular body. A resin layer 2b is formed on the side 1b that is relatively close to the imaginary center point of the bending that occurs during the fabrication of the film.
[0014]
In the tubular body body made of fiber-reinforced prepreg, the side where the product of the longitudinal elastic modulus and the linear expansion coefficient with respect to the axial length direction is large, when the temperature of the tubular body is lowered from high temperature to room temperature, the contraction force acts relatively large, The tubular body bends. In the present invention, the side opposite to the side where the product of the longitudinal elastic modulus and the linear expansion coefficient with respect to the axial length direction is large is defined as the side relatively far from the virtual center point of the bending that occurs during the production of the tubular body.
[0015]
As described above, the side 1a that is relatively far from the virtual center point of bending that occurs during the production of the tubular body is warped because the contraction force that acts on the side 1a that is relatively far from the virtual center point of bending is smaller than the side 1b that is relatively close to the virtual center point of bending. It becomes a state. Usually, the side 1a relatively far from the virtual center point of bending has a small thickness of the tubular body, and the side 1b relatively close to the virtual center point of bending has a large thickness of the tubular body.
[0016]
In this reference example, a relatively thick resin layer 2a is formed on the side 1a that is relatively far from the virtual center point of bending, or a resin layer 2a made of a material having a larger linear expansion coefficient than that of the tubular body. Form. Of course, even if the relatively thin resin layer 2b is formed on the side 1b that is relatively close to the virtual center point of the bend, or the resin layer 2b made of a material having a smaller linear expansion coefficient than the tubular body is formed. good.
[0017]
Here, the difference in thickness between the resin layer 2a and the resin layer 2b is set so that the bending of the tubular body can be corrected. Therefore, there is no particular limitation as long as the bending of the tubular body can be corrected. Examples of the synthetic resin constituting the resin layer include thermosetting resins such as epoxy resins and urethane resins, thermoplastic resins such as polyetherimide resins, and the above-described fiber reinforced prepreg. In addition, as a tubular body, that is, a material having a larger linear expansion coefficient than the fiber reinforced prepreg, thermosetting resins such as epoxy resins and urethane resins, and reinforcing fibers are arranged so as to be inclined with respect to the axial length direction. Examples thereof include a material having a relatively low elastic modulus of the thermosetting resin. In this case, metal fibers (about 10 μm) such as stainless steel and titanium may be embedded in the resin layer to increase the linear expansion coefficient than the tubular body, and internal residual stress (internal energy) may be applied to the resin layer. The linear expansion coefficient may be larger than that of the tubular body. When the linear expansion coefficient is made smaller than that of the tubular body, highly elastic carbon fibers (for example, an elastic modulus of 40 tons or more) are mainly added to the resin layer 2b so as to be aligned in the axial length direction. Can be mentioned.
[0018]
In this reference example, in order to make the difference in linear expansion coefficient as small as possible, an auxiliary prepreg (a prepreg wound around the tip, a prepreg wound to adjust rigidity, a prepreg wound for reinforcement, and a mating part) Prepregs wound around for the buildup of the material may be arranged to alleviate the influence of bending. In this case, examples of the auxiliary prepreg include the following.
[0019]
(1) Wind the fiber with the fiber direction inclined 30 ° symmetrically about the axial direction.
[0020]
(2) A nonwoven fabric, particularly a carbon fiber nonwoven fabric is used.
[0021]
(3) A carbon fiber woven fabric having a high resin content, for example, 50% by weight or more (a degree that the resin is clogged with eyes) is used.
[0022]
(4) A fiber having a plurality of fiber directions and intersecting reinforcing fibers is used.
[0023]
(5) Those having reinforcing fibers aligned in the pipe circumferential direction are used.
[0024]
(6) A material having a low elastic modulus is used.
[0025]
(7) Wrap so that there is no room for overlap. Specifically, the winding ends are abutted or an integer number of turns with a slight gap between the winding ends.
[0026]
(8) Do not make a resin reservoir at the end of the ear. Specifically, a resin having a low resin content is used, or the end portion is shaped so that the thickness decreases toward the tip.
[0027]
(9) A prepreg made of a fiber reinforced thermoplastic resin (FRTP) is further wound or simultaneously wound.
[0028]
(10) The mating ring member is fitted without using the mating ear, or the reinforcing ring is fitted without using the front ear.
[0029]
(11) Fill the mating part.
[0030]
In the above, (1) to (6) contribute to the isotropicization of the tubular body and prevention of resin flow of the prepreg, (7) contributes to prevention of uneven thickness of the prepreg, and (8) to (11). Contributes to the buildup of the mating part.
[0031]
As other aspects,
(12) Wind a low-elasticity member having a low specific gravity.
[0032]
(13) In the overlapping portion of the ear, a plurality of layers are overlapped so that the fiber directions are different (the tube circumferential direction and the axial length direction).
[0033]
(14) A highly elastic prepreg whose fiber direction is the pipe circumferential direction is used, and a low-elasticity prepreg whose fiber direction is the axial length direction is used.
[0034]
By setting it as the above aspects, the bending of a tubular body can be relieve | moderated more.
[0035]
FIG. 1 shows a case where carbon fibers having an elastic modulus of 30 tons or less and a linear expansion coefficient are positive, and carbon fibers having an elastic modulus of 40 tons or more and a negative linear expansion coefficient. 1 is used, the convex side of the curve, that is, the side relatively far from the virtual center point of the curve is the opposite side to the case of FIG. However, the bending of the tubular body can be alleviated by the same manner as described above.
[0036]
Further, in FIG. 1, a thin resin layer is formed on the concave side of the bend, that is, the side relatively close to the virtual center point of the bend, or the resin layer is made of a material having a smaller linear expansion coefficient than that of the tubular body. However, the resin layer is not necessarily formed on the concave side of the bend.
[0037]
FIG. 4 is an explanatory view showing a tubular body according to the first invention of the present invention. In this tubular body, the fiber direction 5 b of the reinforcing fiber of the fiber reinforced prepreg constituting the tubular body is slightly inclined with respect to the axial core 5 a of the soot tube 5. It is desirable that the angle of the fiber direction 5b with respect to the shaft core 5a does not exceed 5 ° considering the influence on bending and rigidity. Moreover, it is preferable that the angle of the fiber direction 5b is relatively larger on the heel side than on the heel side of the tub tube 5. By doing so, it is possible to efficiently prevent the bending that easily occurs on the tip side.
[0038]
Moreover, it positions so that the longitudinal direction of the reinforced fiber of a fiber reinforced prepreg may become a spiral shape. In this case, it is preferable that the spiral is at least one turn from the tip portion to the base portion of the saddle tube 5. The number of spirals varies depending on the length of the soot tube 5, but is preferably as large as possible so long as the rigidity is not lowered. For example, the spiral is 2 to 4 rotations from the tip portion to the base portion of the saddle tube 5.
[0039]
In the first invention, it is sufficient if there is a fiber-reinforced prepreg layer including reinforcing fibers that are inclined with respect to the axial length direction of the tubular body and that the longitudinal direction of the reinforcing fibers is located in a spiral shape. In addition, a fiber reinforced prepreg layer or the like whose fiber direction is the pipe circumferential direction may be present in the wound layer.
[0040]
By adopting such a configuration, it is possible to prevent bending stress applied to the tubular body from being dispersed in the tube circumferential direction and greatly bending in an arcuate shape. Further, even if a slight bend occurs spirally along the axial length direction, the overall performance is not affected. That is, performance anisotropy in the tubular body is prevented.
[0041]
In the first invention, as the fiber reinforced prepreg used for the tubular body, the same one as used in the reference example can be used.
[0042]
FIG. 2 is an explanatory view showing a tubular body according to the second aspect of the present invention. 3 is an enlarged cross-sectional view showing a winding end portion in FIG. In this tubular body, a filling portion (thickness adjusting portion) 4 for filling a step caused by the thickness of the fiber reinforced prepreg is provided at the end of the outermost layer of the wound fiber reinforced prepreg, and at least the outermost layer. The winding end portion 3 of the fiber reinforced prepreg is inclined with respect to the axial length direction of the tubular body. Here, when the winding end portion 3 of at least the outermost fiber reinforced prepreg is inclined with respect to the axial length direction of the tubular body, the fiber reinforced prepreg is usually wound so as to produce a tubular body. A method of winding one ply (winding) or a plurality of plies while being inclined with respect to the axial length direction of the tubular body. The method etc. can be mentioned. In addition, as long as the winding end part 3 of the fiber reinforced prepreg of the outermost layer is inclined with respect to the axial length direction of the tubular body, the tubular body may be constituted by a single fiber reinforced prepreg.
[0043]
The end portion 3 of the outermost layer of the wound fiber reinforced prepreg is provided with a filling portion (thickness adjusting portion) 4 for filling a step caused by the thickness of the fiber reinforced prepreg. The filling portion 4 connects the surface of the outermost layer of the fiber reinforced prepreg and the surface of the layer below it with a gently inclined surface, and plays a role of absorbing a step caused by a thickness difference. The filling portion 4 is a fiber-reinforced prepreg formed by impregnating a reinforcing fiber aligned in a direction in which the fiber direction of the reinforcing fiber is different from the axial direction (in FIG. 3, the direction inclined with respect to the axial direction). It is preferable to comprise. In addition, about the direction of a reinforced fiber, if it inclines with respect to an axial length direction, it will not specifically limit. Thereby, even when a large load is applied, the stress concentrated on the step is dispersed, and the occurrence of peeling or cracking at the end can be prevented. In this case, at least the winding end portion 3 of the fiber reinforced prepreg of the outermost layer is inclined with respect to the axial length direction of the tubular body so that the resin accumulation of the fiber reinforced prepreg in the filling portion 4 does not occur. As a result, meandering and movement of the reinforcing fibers are prevented, and variations in the reinforcing fibers are reduced.
[0044]
When the tubular body is constituted by a plurality of plies using a plurality of fiber reinforced prepregs, a fiber reinforced prepreg (for example, a fiber reinforced prepreg having a large linear expansion coefficient) having a large influence on the bending stress applied to the tubular body is wound around the inner layer. Specifically, a material having a large linear expansion coefficient is used as an inner layer, and a material having a small linear expansion coefficient is used as an outer layer. Alternatively, a material having a high elastic modulus is used as an inner layer, and a material having a low elastic modulus is used as an outer layer. Alternatively, the thin layer is used as the inner layer, and the thick one is used as the outer layer. Alternatively, an integer ply (the number of windings is an integer) is the inner layer, and a half-ply (less than one winding) is the outer layer. In these cases, it is preferable that the overlapping margin when winding a material (inner layer) having a large influence on the bending stress applied to the tubular body is as small as possible, and preferably not. Other factors that affect the bending stress applied to the tubular body include: resin and reinforcing fiber constituting the fiber reinforced prepreg, winding method and winding configuration, presence / absence of auxiliary ear, diameter of tubular body, presence / absence of taper, tubular body And the like. In consideration of these factors, it is preferable to arrange a material having a large influence on the bending stress applied to the tubular body in the inner layer.
[0045]
In addition, when the thin layer is used as the inner layer and the thick layer is used as the outer layer, the overlap between the thin ones (in the pipe circumferential direction) is increased and the one over the thick ones (axial length direction). Is preferably reduced. Moreover, about a half-end ply, it is preferable to arrange | position on the side far from the virtual center point of the curve of a tubular body, and to ease a curve. Moreover, you may combine the said specific winding aspect suitably.
[0046]
In this way, by winding the fiber reinforced prepreg having a large influence on the bending stress applied to the tubular body around the inner layer, the influence of the bending of the tubular body by the inner layer can be mitigated by the outer layer, and the tubular body in which the bending is mitigated Can be obtained.
[0047]
In the second invention, as the fiber reinforced prepreg used for the tubular body main body and the filling portion, the same one as used in the reference example can be used.
[0048]
The tubular body according to the third aspect of the present invention has a joint portion, and is characterized in that the bending that occurs during the production of the tubular body is corrected in the joint portion. Examples of this bending correction include those shown in FIGS.
[0049]
In the tubular body shown in FIG. 5, the joining surface 7 of another soot tube joined at the joint portion 6 is processed substantially parallel to the shaft core 5 a of the soot tube 5. In this case, the other hose pipes are joined together at the joining portion 6 to correct the bending portion h at the joining portion, and the axial core is substantially matched as a whole, so that a tubular body with reduced bending is obtained.
[0050]
In the tubular body shown in FIG. 6, when the joint portion 6 is joined to another soot tube 8, the distal end portion 5 c of the soot tube 5 is processed. Examples of the processing include processing to the joining surface (inner surface and / or outer surface) of the tip portion 5c by machining, and molding that corrects the bending of the tip portion 5c. By such processing, the shaft core at the distal end portion 5 c of the soot tube 5 is brought close to the shaft core of another soot tube 8. In this case, by joining the other soot tube 8 with the soot tube 5, the shaft core as a whole substantially coincides with each other, so that a tubular body with reduced bending is obtained. In addition, as shown in FIG. 6, when joining the other soot pipe 8 to the both ends of the soot pipe 5, the effect is acquired if the said process is given to at least one front-end | tip part 5c.
[0051]
In the tubular body shown in FIG. 7, the inner surface of the joint portion 6 of the soot tube 5 is processed so as to be substantially parallel to the axis of the soot tube 5, and one end of the bending correction member 9 is fitted. The bend correction member 9 is fixed by an adhesive or the like after being fitted to the soot tube 5. In addition, the other end of the bending correction member 9 is fitted into another soot tube 8. In this case, the outer shape of the soot tube 5 has a bend with respect to the shaft center, but the inner surface of the joint portion 6 is processed substantially parallel to the shaft core, and the shaft of the fitted bend correction member 9 is formed. Since the core substantially coincides with the axial core of the soot tube 5, the entire tubular body is relaxed.
[0052]
In this case, the bending correction member 9 may be fitted to the joint portion 6 along the axial direction of the tub tube 5 and bonded and fixed without processing the inner surface of the joint portion 6. Further, the outer surface of the joining portion 6 is processed so as to be substantially parallel to the axial center of the soot tube 5, and a tubular bending correction member that covers the joining portion 6 of the soot tube 5 is bonded and fixed to bend. May be relaxed. Further, this joining method can be applied to any joining method such as swing-out, parallel joining, and reverse parallel joining.
[0053]
In the tubular body shown in FIG. 8, the thickness of the tubule main body 10 that is relatively far from the virtual center point of bending and the thickness of the joint portion 6 that is relatively far from the virtual center point of bending are changed. ing. In the tubular body 10a of the tubular body using the fiber reinforced prepreg whose reinforcing fiber is carbon fiber, the thin part is the side relatively far from the virtual center point of bending, that is, the convex side of bending. Tend. In this case, the thickness of the joining portion 6a on the side relatively far from the imaginary center point of the bend is made thicker than the thickness of the soot tube main body portion 10a. On the contrary, the thickness of the joining portion 6b on the side relatively close to the virtual center point of the bending is made thinner than the thickness of the soot tube main body portion 10b. By setting it as such a structure, it becomes a tubular body by which the curve was correct | amended and the curve was eased as a whole.
[0054]
In addition, in the tubular body portion of the tubular body using the fiber reinforced prepreg in which the reinforcing fiber is a glass fiber, the thick part is a side relatively far from the virtual center point of the bending, that is, the convex side of the bending Tend to be. Therefore, contrary to the above case, the thickness of the joint portion 6a on the side relatively far from the virtual center point of bending is made thinner than the thickness of the soot tube main body portion 10a. Further, the difference in thickness is not particularly limited as long as the bending can be corrected. FIG. 8 also shows the case where carbon fibers having an elastic modulus of 30 tons or less and a linear expansion coefficient are used, and carbon fibers having an elastic modulus of 40 tons or more and a negative linear expansion coefficient. Is used, the convex side of the curve, that is, the side relatively far from the virtual center point of the curve is the opposite side to the case of FIG. Even in this case, the bending can be relaxed in the same manner as described above.
[0055]
FIG. 9 is an explanatory view showing another embodiment of the tubular body according to the present invention. The tubular body shown in FIG. 9 is a tube having a constant diameter change rate or a taper that changes at least 3/1000 or less even when a taper change point is present. The bend correction layer 11 is formed. This bend correction layer 11 may be provided by fitting a tubular bend correction member after producing the soot tube 5, and a temperature different from the molding temperature of the fiber-reinforced prepreg constituting the soot tube 5 after producing the soot tube 5. Alternatively, it may be provided by overlaying with a material having a molding temperature lower than the molding temperature of the fiber reinforced prepreg. Even in such a configuration, it is possible to obtain a tubular body with less bending.
[0056]
The soot tube 5 may be composed of a plurality of fiber reinforced prepregs. Moreover, when comprising the tub tube 5, it is preferable that the thickness of parts other than the overlap is uniform.
[0057]
As shown in FIG. 10, when a fiber reinforced prepreg is wound using a mandrel 12 having a taper with a different diameter change rate, the taper change is increased by increasing the thickness of the region where the taper diameter change rate is different. To mitigate the effects of That is, when a mandrel having a taper portion 12a having a small diameter change rate close to a straight and a taper portion 12b having a relatively large diameter change rate is used, the thickness of the region including the taper change point 12c is increased. The overlapping portion of the main body prepreg 13a and the heel side prepreg 13b and the overlapping portion of the main body prepreg 13a and the heel side prepreg 13c are made as long as possible. In this case, it is preferable that the heel side prepreg 13b and the heel side prepreg 13c are substantially rectangular so that the thicknesses are substantially the same in the pipe circumferential direction. In addition, the end portion of the prepreg in the overlapping portion may be formed in a staircase shape using a plurality of half-end prepregs, or in a shape in which the thickness becomes thinner toward the tip of the end portion, or the above-described filling portion may be used. It is preferable to absorb the step at the end.
[0058]
In addition, as shown in FIG. 11, when the taper changing point 16 a is provided in the joining portion 16 of the small diameter soot tube 14 and the large diameter soot tube 15, the taper changing point 16 a exists in the joining portion 16. Thus, specifically, it is preferable to set the distance d between the tip of the heel side of the large-diameter rod 15 and the taper change point to 10 mm or more. Thereby, the bending resulting from the presence of the taper change point can be corrected.
[0059]
The reference example, the first to third inventions, and other aspects of the present invention can be implemented in appropriate combination. In the present invention, in the fiber reinforced prepreg, the ratio of the resin to the total weight of the reinforcing fiber (carbon fiber) and the resin is preferably as small as possible, approximately 23% by weight or less. Thereby, the specific strength and specific elasticity of the tubular body can be improved as much as possible, the meandering and movement of the reinforcing fibers can be prevented, and the bending amount of the tubular body can be reduced.
[0060]
In the above reference examples and embodiments, the case where a fishing rod is used as a tubular body is described, but the present invention is not limited to this, and a golf club shaft, ski stock, bicycle frame, badminton or tennis racket It is possible to apply to.
[0061]
【The invention's effect】
As described above, the tubular body of the present invention is formed by winding a fiber reinforced prepreg obtained by impregnating a reinforcing fiber aligned in a specific direction with a resin, and the reinforcing fiber extends in the axial length direction of the tubular body. Since the reinforcing fiber is positioned so that the longitudinal direction of the reinforcing fiber is spiral, the bending component is dispersed in the pipe circumferential direction, and the displacement from the shaft core is relatively reduced. It makes the curve inconspicuous.
[0062]
Further, the tubular body of the present invention is formed by winding a fiber reinforced prepreg obtained by impregnating a resin into a reinforced fiber aligned in a specific direction, and the fiber reinforced prepreg is wound at the end of the outermost layer of the wound fiber reinforced prepreg. A filling portion that fills a step due to the thickness of the prepreg is provided, and at least an end portion of the outermost fiber-reinforced prepreg is inclined with respect to the axial length direction of the tubular body. In addition, the bending component is dispersed in the pipe circumferential direction, and the displacement from the shaft core is relatively reduced to make the bending inconspicuous.
[0063]
Furthermore, the tubular body of the present invention is a tubular body having a joint portion formed by winding a fiber reinforced prepreg obtained by impregnating a resin into a reinforcing fiber, and is generated at the time of producing the tubular body at the joint portion. Since the bending is corrected, by supporting the tubular body at the joint, the amount of displacement from the shaft core due to the bending that occurs at the time of manufacture is reduced, making the bending inconspicuous, and the occurrence of vibration and blurring due to the bending Is to prevent.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a tubular body according to a reference example.
FIG. 2 is an explanatory view showing a tubular body according to a second invention of the present invention.
3 is an enlarged cross-sectional view showing a winding end portion in FIG. 2. FIG.
FIG. 4 is an explanatory view showing a tubular body according to the first invention of the present invention.
FIG. 5 is an explanatory view showing an example of a tubular body according to a third invention of the present invention.
FIG. 6 is an explanatory view showing another example of the tubular body according to the third invention of the present invention.
FIG. 7 is an explanatory view showing another example of the tubular body according to the third invention of the present invention.
FIG. 8 is an explanatory view showing another example of a tubular body according to the third invention of the present invention.
FIG. 9 is an explanatory view showing another embodiment of the tubular body according to the present invention.
FIG. 10 is an exploded view for explaining a tubular body having a taper changing point according to the present invention.
FIG. 11 is a cross-sectional view showing a tubular body having a taper change point at a joining portion according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a, 1b ... Tubular body main body, 2a, 2b ... Resin layer, 3 ... Winding end part, 4 ... Filling part, 5 ... Steel pipe, 5a ... Shaft core, 5b ... Fiber direction, 5c ... Tip part, 6, 6a , 6b, 16 ... joint part, 7 ... joint surface, 8 ... other pipes, 9 ... bending correction member, 10a, 10b ... pipe main body part, 11 ... bending correction layer, 12 ... mandrel, 12a, 12b ... taper part, 12c, 16a ... taper changing point, 13a ... main body prepreg, 13b ... tip side prepreg, 13c ... base side prepreg, 14 ... small diameter side pipe, 15 ... large diameter side pipe.

Claims (2)

A fishing rod formed by winding a fiber reinforced prepreg obtained by impregnating a reinforcing fiber aligned in a specific direction with a resin, wherein the reinforcing fiber is inclined with respect to the axial length direction of the fishing rod , and The reinforcing fiber is positioned so that the longitudinal direction thereof is spiral, and the angle of the reinforcing fiber to the axial direction of the fishing rod is 5 ° or less, which is closer to the tip than the rod side of the fishing rod. A fishing rod characterized by a relatively large diameter . The fishing rod according to claim 1, wherein the reinforcing fiber is positioned so that a longitudinal direction of the reinforcing fiber is a spiral of 2 to 4 rotations.

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