JP2000236782A - Fishing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fishing rod by winding specific reinforcing prepregs on the joint to prevent the joint from plastic bending or rigidity drop, thereby improve the joint condition. SOLUTION: This fishing rod provided with a joint between a larger-diameter rod pipe 11 and a smaller-diameter rod pipe 12 is obtained by winding reinforcing prepregs 5, 15 with the reinforcing fibers oriented slantly on the joint; wherein it is preferable that the reinforcing fibers of the reinforcing prepregs 5, 15 are arranged in parallel crosswise, and the respective joints of the larger- diameter rod pipe 11 and the smaller-diameter rod pipe 12 are wound with the reinforcing prepregs with the reinforcing fibers arranged in parallel slantly and the respective reinforcing fibers of both the prepregs crossed mutually.

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 fishing rod having a characteristic at a joint between rod pipes.

[0002]

2. Description of the Related Art Conventionally, fishing rods are of a swing type, a joint type,
It is configured to join a small diameter rod pipe to a large diameter rod pipe such as a spigot joint type.Each rod pipe is made by winding a so-called prepreg, in which reinforcing fibers are aligned and impregnated with synthetic resin. Generally, it is configured by turning. In each rod tube, the alignment direction, the elastic modulus, the resin impregnation amount, the number of windings, and the like of the reinforcing fibers used in the prepreg are set in accordance with the place where the rod tube is used.

Usually, when the above-mentioned rod pipes are of the swing type, the outer circumference of the base end of the rod pipe on the tip side (small diameter rod pipe) and the inner circumference of the tip of the rod pipe on the former rod side (large diameter rod pipe). Are joined together by friction joining, and the joint portion of each rod tube has a configuration in which a reinforcing layer is formed in addition to the main body layer constituting the rod tube. The reinforcing layer is formed of a reinforcing prepreg configured by aligning reinforcing fibers in the axial direction or the circumferential direction.

[0004]

However, in the above-mentioned conventional structure, the strength and rigidity at the joint are not sufficient,
When used repeatedly, there is a problem that deformation due to shearing force or plastic bending occurs, resulting in a poor joining state. In order to reduce such a problem, it is conceivable to lengthen the spliced portion. However, if the spliced portion is too long, the deflection balance of the fishing rod as a whole deteriorates and the weight increases.

[0005] It is an object of the present invention to provide a fishing rod which prevents a plastic bending or a decrease in rigidity in a joint portion and improves a joint state.

[0006]

In order to solve the above-mentioned problems, a fishing rod according to the present invention comprises a reinforcing prepreg having reinforcing fibers in an inclined direction at a joint portion for joining a large-diameter rod tube and a small-diameter rod tube. It is characterized by being wound.

As described above, by wrapping the reinforcing prepreg (bias layer) in which the reinforcing fibers are inclined in the joining direction, deformation due to shearing force is prevented, and the strength of the joining portion is increased. Can be improved. The reinforcing prepreg as described above may be wound around either the joint of the large-diameter rod pipe or the joint of the small-diameter rod pipe, but is preferably wound around both.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

(First Embodiment) FIGS. 1 and 2 show a first embodiment of the present invention. FIG. 1 shows a joint portion when the present invention is applied to a swing-out type fishing rod. FIGS. 2 (a) and 2 (b) are partial cross-sectional views, each showing an example of an arrangement configuration of a prepreg forming a rod pipe having such a joint portion.

In FIG. 1, reference numeral 1 denotes a small-diameter rod pipe, and reference numeral 11 denotes a large-diameter rod pipe, and a portion indicated by R is a joining portion for joining both rod pipes. As shown in FIG. 2, each rod pipe is made of a fiber reinforced prepreg in which reinforcing fibers are impregnated with a synthetic resin (a main body prepreg forming the entire rod pipe).
(FIG. 2A shows a small-diameter rod pipe, and FIG. 2B shows a large-diameter rod pipe).

In this case, the main body prepreg is usually
It is configured as follows, and these are wound to form a main body layer of the rod pipe. Here, FIG.
The small diameter rod pipe will be described in detail with reference to FIG. 2, and the description of the large diameter rod pipe shown in FIG.

The main body prepreg includes a first prepreg 2 composed of a prepreg 2a in which reinforcing fibers are aligned in the axial direction, a prepreg 2b in which reinforcing fibers are aligned in the circumferential direction, and a reinforcing fiber in the circumferential direction. Prepreg 3 in which reinforcing fibers are aligned in the axial direction to prepreg 3b in which
a, and a second prepreg 3 configured by lining the prepreg. The rod pipe is formed by sequentially winding these main body prepregs 2 and 3 around the core metal M, and then performing steps according to a conventional method such as heating, decentering, and polishing.

As a result, the main body layer of the small-diameter rod tube 1 is as shown in FIG.
As shown in the figure, the circumferential fiber layer (inner layer) 2
b, an axial length fiber layer (intermediate layer) 2a, 3a and a circumferential fiber layer (outer layer) 3b. As described above, in the case where the main body layer is formed by arranging the circumferential fiber layers on the inner side and the outer side and arranging the axial fiber layer (or a layer mainly composed of the axial fiber layers) in the middle, The elastic modulus of the fiber of the prepreg used as the rubber is 24 to 50 ton / m.
m ² , the resin impregnation amount is 25 to 50 wt%, the thickness of the prepreg is 0.06 mm or less, and the elastic modulus of the fiber of the prepreg used as the axial length fiber layer is 40 to 90 ton /
mm ² , the resin impregnation amount is 10 to 28 wt%, the thickness of the prepreg is 0.14 mm or less, and the difference between the two elastic moduli is 50.
% Is preferable. With such a configuration, the stability can be improved and the specific strength and the specific rigidity can be improved.
Similarly, the large-diameter rod pipe 11 has a circumferential fiber layer (inner layer) 1.
2b, an axial length fiber layer (intermediate layer) 12a, 13a, and a circumferential fiber layer (outer layer) 13b.

Pre-pregs 5 and 15 for reinforcement are wound around the joint R of each rod pipe, that is, the base end of the small-diameter rod pipe 1 and the distal end of the large-diameter rod pipe 11. Each of the prepregs 5, 15 is obtained by superimposing a prepreg in which reinforcing fibers are aligned at -45 ° on a prepreg in which reinforcing fibers are aligned at + 45 ° with respect to the axial direction, and as shown in FIG. The fibers are arranged in a cross shape. Such a prepreg is wound around the outer periphery of the base end of the small diameter rod tube 1 and the inner periphery of the distal end of the large diameter rod tube 11.

As described above, by wrapping the reinforcing prepreg in which the reinforcing fibers are aligned in a crossing manner at the joint portion R of each rod pipe, the shear elastic modulus at the joint portion is several times that of the unwrapped portion. It is also possible to effectively reduce shear deformation and plastic bending (curve bending) and improve the strength of the joint. Further, since the strength can be improved in this manner, the joint R can be shortened, and the weight of the entire fishing rod can be reduced.

Here, the specific configuration of the reinforcing prepreg provided at the joint portion as described above and various modifications will be described.

(1) The reinforcing prepreg is preferably wound around both the large-diameter rod tube and the small-diameter rod tube, but either one of the rod tubes may be used. In the configuration shown in the figure,
Although the reinforcing prepregs 5 and 15 are stacked so that the reinforcing fibers cross each other, a configuration in which prepregs in which reinforcing fibers are merely aligned in an inclined direction may be wound at an arbitrary position may be used. In this case, for example, -45 °
It is preferable that the reinforcing fibers of both prepregs cross each other such that the large-diameter rod pipe side is aligned at + 45 °.

Further, in the configuration shown in the figure, the reinforcing prepregs 5, 15 are provided with +
Although the prepreg of 45 ° and the prepreg of −45 ° are superposed, they may be individually wound at arbitrary positions of the joint without superimposition. Further, in the case of the reinforcing prepregs 5 and 15 which are stacked in advance, it is preferable to wind the reinforcing prepregs 5 and 15 so as to be in surface contact with each other as shown in the drawing.

When the reinforcing fibers are made to cross each other, the reinforcing fibers may be piled up and down in an intersecting manner, or may be woven in advance, instead of overlapping the aligned sheets.

(2) Regarding the inclination angle of the reinforcing fiber, since the direction in which the shear modulus becomes maximum is 45 °,
It is most preferable to set the angle to ± 45 °, but considering the workability at the time of winding and the necessity of preventing crushing, etc., ± 30 ° to ± 30 °
The angle may be in the range of 60 °, and since a more desirable effect can be exhibited than in the conventional configuration, the angle may be in the range of ± 15 ° to ± 75 °. Of course, reinforcing fibers aligned in the 0 ° or 90 ° direction may be added.

(3) When the thickness (fiber amount) of the fiber layer in the inclined direction at the spliced portion is a, and the thickness (fiber amount) of the main body layer at portions other than the spliced portion (the middle portion of the rod pipe) is b In order to reduce the weight of the middle part of the rod pipe and concentrate the reinforcement at the joint, a> b is set. Preferably, a is set to three times or more of b. (4) The thickness of the reinforcing prepreg is In consideration of the strength against the shear stress and the reinforcing effect, the thickness is preferably set to 0.02 mm or more, and the thickness is set to 1.5 to prevent uneven thickness and meandering of the fiber.
mm or less. Further, the layer thickness of the reinforcing prepreg at the joint portion is 3 to 8 times the total thickness at that portion.
0%, preferably 7 to 50%.

(5) Regarding the arrangement in the longitudinal direction of the reinforcing prepreg, as shown in FIG. 1, the entire joint portion R may be wound around (100%) or a large-diameter rod pipe. And the small diameter pipe may be partially overlapped or wound without overlapping.

For example, each of the prepregs 5 and 15 may be wound so that only an intermediate portion of the joint R overlaps with each other in consideration of stress distribution in the joint. Alternatively, the small-diameter rod pipe and the large-diameter rod pipe may be wound over a predetermined range from the respective end faces P1 and P2. In this case, if it is wound around only the tip portions of the rod pipes 1 and 11, it may be wound only on the small-diameter rod pipe side that is easily damaged. Or,
It may be wound over a predetermined range from the original side (the side opposite to P1 and P2) in the joint portion of each rod pipe. In this case, if only the base portions of the rod pipes 1 and 11 are wound, they may be wound only on the large-diameter rod pipe side that is easily damaged.

Alternatively, the reinforcing prepreg may be wound beyond the region of the joint R (see FIG. 10). In this case, assuming that the thickness of the inclined direction fiber layer at the joint portion is c, and the thickness of the inclined direction fiber layer at a portion beyond the joint portion is d,
Since the stress acting on the portion beyond the joint is smaller than that of the joint, it is preferable that c ≧ d. In such a configuration, the thickness c is preferably set to 0.02 to 1.5 mm, and is preferably set to 5 to 80% with respect to the total thickness at that portion (the entirety is formed by the inclined fiber layer). The thickness d is preferably 0.01 to 0.05 mm. In addition, it is preferable that c / d is 2.0 times or more.

As described above, the reinforcing prepreg can be wound with various lengths at various positions in the axial direction.

With respect to the above constitutions (1) to (5),
It is possible to carry out in appropriate combination.

(Second Embodiment) FIG. 3 is a diagram showing a second embodiment. In the following embodiments, the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, as in the previous embodiment, reinforcing prepregs 5 and 15 are wound around the outer periphery of the base end of the small diameter rod tube 1 and the inner periphery of the distal end of the large diameter rod tube 11, respectively. At the joint R, the outer and inner axial prepregs 3a and 12a of the rod pipes 1 and 11 are cut by about 50% from the ends P1 and P2, respectively, and the reinforcing fibers are circumferentially aligned in this portion. Prepregs 3d and 12d are wound. As described above, when the fishing rod is bent at the joint portion, the circumferential prepreg is separately wound around the portion that is easily affected by the crushing, whereby a reinforcing effect against the crushing can be obtained.

(Third Embodiment) FIG. 4 is a diagram showing a third embodiment.

In this embodiment, reinforcing prepregs 6 and 16 are wound around the outer periphery of the base end of the small diameter rod tube 1 and the inner periphery of the distal end of the large diameter rod tube 11, respectively. in this case,
The reinforcing prepreg 6 has a reinforcing fiber of -4 in order from the inner layer side.
The prepregs 6a, 6b, 6c, which are aligned at 5 °, 90 ° (circumferential direction), and + 45 °, are superimposed.
Reinforcing prepreg 16 has reinforcing fibers in order from the inner layer side.
The prepregs 16a, 16b, 16c are aligned at 45 °, 90 ° (circumferential direction), and + 45 °.

As described above, when forming a prepreg for reinforcement, a prepreg in which reinforcing fibers are aligned in the circumferential direction is separately interposed as shown in the figure so as to effectively improve the strength against crushing. Or may be superimposed on an arbitrary position.

(Fourth Embodiment) FIG. 5 is a diagram showing a fourth embodiment.

In this embodiment, the axial length fiber layer 3a of the small diameter rod tube 1 and the axial length fiber layer 12a of the large diameter rod tube 11
Are respectively cut over the region of the joint portion R, and the reinforcing prepregs 7, 17 in which the reinforcing fibers are aligned at −45 ° and + 45 ° are wound here. On the outer layer side of the reinforcing prepreg 7 and on the inner layer side of the reinforcing prepreg 17, circumferential prepregs 8, 18 in which reinforcing fibers are aligned in the circumferential direction are wound respectively. In this manner, an arbitrary layer at the joint R is cut, and the reinforcing prepreg 7,
By arranging 17 and making the surface contact portions between both rod tubes the circumferential fiber layers 8 and 18, a change in rigidity at the joint portion is reduced, and the rigidity balance of the rod can be improved. In addition,
In the above-described configuration, the circumferential fiber layers 8 and 18 may be omitted.

(Fifth Embodiment) FIG. 6 is a diagram showing a fifth embodiment.

In this embodiment, the circumferential prepreg 19 is wound around the innermost periphery of the joint portion R of the large diameter rod pipe 11, and the reinforcing fibers are aligned at -45 ° and + 45 ° around the outermost periphery. Reinforced prepreg 20 is wound. As described above, the reinforcing prepreg 20 may be wound on the outermost layer of the large-diameter rod pipe at the joint portion, and by winding on the outermost layer, disturbance of the main body prepreg can be reduced. In addition, by disposing in the outer layer, the elasticity of the reinforcing fiber can be used effectively, and the strength can be efficiently increased.

(Sixth Embodiment) FIG. 7 is a diagram showing a sixth embodiment.

In this embodiment, the outermost periphery of the joint R of the small-diameter rod 1 and the innermost periphery of the joint R of the large-diameter rod 11 are
The circumferential prepregs 21 and 25 are wound, respectively, and the intermediate region between the circumferential prepregs 21 and 25 is cut over a predetermined range. 23 are wound. In this way, by wrapping the reinforcing prepreg around the portion of the joint R where deformation is most likely to occur due to shearing force, a change in the rigidity balance of the rod can be reduced.

(Seventh Embodiment) FIG. 8 is a diagram showing a seventh embodiment.

In this embodiment, the circumferential prepreg 30 is wound around the innermost periphery of the joint portion R of the large diameter rod tube 11, and the reinforcing fiber is pulled to ± 45 ° around the outermost periphery of the small diameter rod tube 1. The aligned reinforcing prepregs 35 are partially disposed. In this case, the reinforcing prepreg 35 is provided at two locations facing each other in the radial direction,
They are arranged with a predetermined width. As described above, by arranging the reinforcing prepreg partially in the circumferential direction instead of winding the reinforcing prepreg, the tone can be arbitrarily changed depending on the bending direction of the rod. In the configuration shown in the figure, the rod is easy to bend in the direction of the arrow and difficult to bend in the direction perpendicular to the arrow.

(Eighth Embodiment) FIG. 9 is a diagram showing an eighth embodiment.

In this embodiment, a cylindrical reinforcing member 40 having a flange 40a is detachably attached to the innermost peripheral portion of the joint portion R of the large diameter rod pipe 11. Reinforcement member 40
Is a prepreg in which the reinforcing fibers are aligned to ± 45 ° and molded into a cylindrical shape.
The same effect can be obtained by forming the tube into a cylindrical shape and winding it separately from the rod tube main body.

(Ninth Embodiment) FIG. 10 is a diagram showing a ninth embodiment.

In this embodiment, a reinforcing prepreg having the following structure is provided at the joint R between the small-diameter rod tube 1 and the large-diameter rod tube 11 having the above-described main body layer.

Reinforcing prepregs 51 and 53 in which reinforcing fibers are aligned at ± 45 ° are wound around the inside and outside of the main body layer at the joint portion R of the small diameter rod tube 1. In this configuration, since the force for adjusting the anglers is not constant for each person and the joint length may vary, it is preferable that both reinforcing prepregs 51 and 53 are formed to be longer than the joint length R. , Considering the effect on appearance,
Since the inner side has less influence, it is preferable to form the inner reinforcing prepreg 51 longer than the outer reinforcing prepreg 53. However, the outer reinforcing prepreg 53 may be formed in the range of the joint portion R so as not to be exposed from the large-diameter rod 11 during use. Specifically, the respective protruding lengths L1, L2 of the reinforcing prepregs 53, 51 from the end face P2 of the large-diameter rod pipe 11 are as follows.
L1 is 15 mm to -10 mm, preferably 0 mm to -1
It is good to be 0 mm, and L2 is good to be 10 mm-50 mm. Further, it is preferable to make the thickness of the reinforcing layer made of the outer prepreg 53 larger than the thickness of the reinforcing layer made of the inner reinforcing prepreg 51.

As described above, the reinforcing prepreg 53 on the outer side of the small diameter rod pipe 1 is a fiber layer (outer reinforcing layer) in the inclination direction of ± 45 °. (A) The total thickness is 0.05 to 0. .
3 mm (preferably 0.1 to 0.25 mm),
(B) 20% or more and 80% or less of the thickness of the main body layer,
(C) When the internal diameter of the rod pipe is d and the total thickness including the main body layer is t, t / d is 0.15 to 0.015 (preferably 0.06 to 0.02). It is preferable to form the outer reinforcing layer so that at least one of the requirements is satisfied. By adopting such a configuration, it is possible to provide a lightweight and high-strength joint.

Further, reinforcing prepregs 61 and 63 in which reinforcing fibers are aligned at ± 45 ° are wound around the inside and outside of the main body layer at the joint portion R of the large-diameter rod tube 11. In this configuration, both reinforcing prepregs 61 and 63 are preferably formed to be longer than the standard joint length R in consideration of the variation in the joint length when the angler pulls out and engages the rod tube. Preferably, the inner reinforcing prepreg 61 is formed longer than the outer reinforcing prepreg 63 so that the main layer of the female-side rod tube is protected when the mating length varies.

In this embodiment, the fiber directions of the reinforcing prepregs 51, 53 (61, 63) are -45 ° and + 45 °, respectively (may be in the range of ± 30 ° to ± 75 °). It is not necessary to form a cross shape as shown in FIG. As shown in the figure, the inner reinforcing prepreg and the outer reinforcing prepreg as described above may be wound on both the small-diameter rod pipe and the large-diameter rod pipe, or on either one of the rod pipes. May be. Further, such a reinforcing prepreg may be wound only on the inside, for example, in a crossed or inclined direction. Further, in addition to the above-described inner reinforcing prepreg and outer reinforcing prepreg, a reinforcing prepreg (third reinforcing prepreg) may be separately wound around an intermediate portion thereof or outside the outer reinforcing prepreg. In the configuration in which the third reinforcing prepreg is wound in this way, the direction of each fiber of the inner reinforcing prepreg, the outer reinforcing prepreg (either one of which may be omitted), and the third reinforcing prepreg is inclined / If there is a layer in the cross direction, there may be a layer in which fibers are aligned in the axial direction and the circumferential direction. For example, in a small diameter rod pipe, the fibers of the outer reinforcing prepreg are axially omitted, and the inner reinforcing prepreg is omitted.
By winding the third reinforcing prepreg on the outside of the outer reinforcing prepreg and setting the fiber direction to the inclined / crossing direction, it is possible to increase rigidity in the axial direction and suppress deformation. Alternatively, in a small-diameter rod pipe, the fibers of the outer reinforcing prepreg are circumferentially omitted, and the inner reinforcing prepreg is omitted,
By wrapping the third reinforcing prepreg on the outside of the outer reinforcing prepreg and setting the fiber direction to the inclined / crossing direction, it is possible to effectively reinforce crushing and hitting at the end face.

As described above, in the case of winding the inner reinforcing prepreg, the outer reinforcing prepreg, and the third reinforcing prepreg, the layer thickness of the inner reinforcing prepreg and the outer reinforcing prepreg should be 0.01 to 1.5 mm. good. in this case,
If the thickness of the outer reinforcing layer is thicker than the thickness of the third reinforcing layer,
The sharp bend at these boundaries can be suppressed, and the concentrated stress when the rod tube is bent and hit by the ball can be dispersed. Further, in this configuration, when the inside reinforcing prepreg is wound, it is possible to prevent the growth of the crack from the end face and the crepe, and to improve the strength.

As described above, in the reinforcing prepreg wound around the joint R, the fibers move during molding or the fibers are aligned in an oblique direction. It may fall apart. For this reason, the reinforcing prepreg is preferably configured, for example, as shown in FIG. That is, a prepreg 70a in which fibers inclined at + 45 ° ± 15 ° are aligned and −45 ° ±
A woven fabric 75 of glass fiber is superimposed on a reinforcing prepreg 70 configured by superposing a prepreg 70b in which fibers inclined at 15 ° are aligned, and this is wound around a joint portion of a rod pipe as a reinforcing prepreg. In this way, by further laying the glass fiber woven fabric, the movement of the fiber of the reinforcing prepreg in the joint portion at the time of molding can be restricted to prevent variation, and a high-strength joint portion can be obtained. it can,
In addition, it is possible to prevent the dispersion of fibers during the work,
It becomes easier to manufacture a rod tube. In addition, woven fabric of glass fiber,
The fiber direction may be arranged so as to be in the axial direction and the circumferential direction, but it is preferable to set the inclination direction (± 45 °) like the inclination direction fiber of the reinforcing prepreg. With such an inclined direction, reinforcement against shearing (combination with the inclined direction fiber) can be efficiently performed.

In the structure shown in FIG. 11, the reinforcing prepreg 70 is used so that a preferable effect can be obtained as a joint.
The a and 70b and the glass fiber woven fabric 75 are preferably configured as follows. The thickness of each of the prepregs 70a and 70b is 0.01 to 0.04 mm, and the combined thickness is 0.05 mm or less.
Is 0.01 to 0.03 mm, and the total thickness of the reinforcing prepreg 70 and the glass fiber woven fabric 75 is 0.06 m.
m (not limited to this, each prepreg 70a, 7
0b, 0.01 to 0.15 mm each, the combined thickness is 0.3 mm or less, the thickness of the glass fiber woven fabric 75 is 0.01 to 0.1 mm, the reinforcing prepreg 70 and Set the total thickness of the glass fiber woven fabric 75 to 0.
4 mm or less). Each prepreg 70a, 70
The resin impregnation amount of b is set to 15 to 70 wt%, which is larger than the resin impregnation amount of the axial length fiber layer of the main body layer. For the glass fiber woven cloth 75, the resin impregnation amount is 0 to 70 wt.
Make the most as%. Also, the prepregs 70a, 70
As for the fiber b, a fiber having an elastic modulus of 1 to 90 ton / mm ² is used. With the joint portion configured as described above, the shear elastic modulus of the joint portion can be higher than that of the conventional product. Further, by suppressing the shear deformation, the strength of the joint portion can be increased.

The joining portion R formed by laminating a woven fabric 75 of glass fiber on the reinforcing prepreg 70 as described above is further provided with a prepreg (hereinafter, referred to as a second reinforcing prepreg) in which fibers are aligned in the circumferential direction. May be repeated. FIG.
In the configuration shown in FIG.
8 (hereinafter referred to as a second reinforcing layer) inside the reinforcing prepreg 53 on the distal end side of the small-diameter rod tube 1 (the reinforcing prepreg 53 may be partially cut out and wound), and a large-diameter rod. It is wound around the reinforcing prepreg 63 on the distal end side of the tube 11. Such a second reinforcing prepreg is preferably stacked on the reinforcing prepreg side (the side other than the glass fiber woven fabric side). The reinforcing prepregs 70 and 78 and the woven fabric 75 of glass fiber may be stacked in a sheet shape in advance to form a single prepreg, or may be individually wound when wound around a cored bar. Is also good.

By further stacking the second reinforcing prepreg 78 as described above, it is possible to effectively prevent collapse at the joint. Therefore, such a prepreg 78 is partially (5 to 20 mm) at the end of the joint R.
It is good to additionally wind.

The joint configured as described above is applicable to each of the above-described embodiments.

Next, the thickness of each of the main body layer at the joint portion, the reinforcing layer made of prepreg whose fibers are aligned in the inclined direction, and the second reinforcing layer made of prepreg whose fibers are aligned in the circumferential direction (fiber thickness) An example of a preferable configuration for the ratio of (amount) will be described with reference to FIG. FIG.
2, the main layer of the large diameter rod pipe 11 is denoted by reference numeral 80, the reinforcement layer is denoted by reference numeral 81, the second reinforcement layer wound on the reinforcement layer 81 is denoted by reference numeral 82, and the small diameter rod pipe 1 is denoted by reference numeral 82. Reference numeral 90 denotes a main body layer, reference numeral 91 denotes a reinforcing layer, and reference numeral 92 denotes a second reinforcing layer wound around the reinforcing layer 91 by partially cutting out the reinforcing layer 91. In FIG. 12, X, Y, Z
Indicates a distal end portion, an intermediate portion, and a base end portion on the main body side of the joint portion R.

Then, the relative ratio of the fiber amount of each layer in the axial direction at each position of the joint R having the structure shown in FIG. 12 is set as shown in the following table.

[0056]

[Table 1]

In each layer, the relative ratio of the fiber amount at each position in the axial direction is set as described above, so that the tip X
Can prevent tearing, middle part X can prevent shearing,
At the base end Y on the main body side, the rigidity balance can be improved. The relative ratio of the fiber amount in the axial direction at the joint portion as described above may be applied to either one of the rod pipes, but is preferably applied to both rod pipes. Further, the above-described fiber amount ratio can be applied to all the above-described embodiments.

In the structure shown in FIG.
The reinforcing layer 91 is preferably wound around the entire circumference. However, when the reinforcing layer 91 is divided into a plurality of parts and partially disposed in a part in the circumferential direction (see FIG. 8), the weight can be reduced. Also, the reinforcing layer 8
The fibers 1 and 91 can be reinforced efficiently by using those having higher elasticity than the elastic modulus of the fibers in the axial direction in the main body layers 80 and 90.

Although the embodiments of the present invention have been described above, in the embodiments other than the above-described first embodiment, the configurations (1) to (5) in the above-described first embodiment are appropriately used. Is possible. In each of the above-described embodiments, the number of prepregs constituting the rod pipe main body, the amount of resin impregnation, the wall thickness, the number of windings, the direction of the reinforcing fibers used, the amount of fibers, the elastic modulus, and the like may be variously modified. Is possible. For example, by reducing the axial length fiber of the rod tube body toward the end and increasing the circumferential fiber of the joint toward the end, the bending of the joint and the improvement of the bending property can be achieved. . Further, in the above-described embodiment, the swing-out type rod has been described. However, the present invention can also be applied to a spigot joint and a side-joint type rod.

As in the above-described embodiment, the amount of shear deformation at the joining portion can be suppressed by winding the reinforcing layer in which the fibers intersect (tilt) around the joint portion.
The rigidity of the entire rod can be improved. In this case, it is possible to further increase the rigidity by increasing the elastic modulus of the fiber of the reinforcing layer.

[0061]

According to the present invention, by providing a prepreg in which reinforcing fibers are aligned in the inclined direction at the joint portion between rod pipes, the strength of the joint portion is improved, and plastic bending and
The occurrence of shear deformation and the like is suppressed, and a fishing rod with an improved joined state is obtained. In addition, it is possible to reduce the length of the joint portion, so that the weight of the entire fishing rod can be reduced.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and is a partial cross-sectional view of a joint portion when the present invention is applied to a swing-out fishing rod.

FIG. 2A is a view showing an example of the arrangement of prepregs forming a small-diameter rod pipe having the joint shown in FIG. 1;
FIG. 3 is a diagram showing an example of the arrangement configuration of prepregs forming a small-diameter rod pipe having the joint shown in FIG. 1.

FIG. 3 is a partial cross-sectional view of a joint according to a second embodiment of the present invention.

FIG. 4 is a partial cross-sectional view of a joint according to a third embodiment of the present invention.

FIG. 5 is a partial cross-sectional view of a joint according to a fourth embodiment of the present invention.

FIG. 6 is a partial cross-sectional view of a joint according to a fifth embodiment of the present invention.

FIG. 7 is a partial cross-sectional view of a joint according to a sixth embodiment of the present invention.

FIG. 8 is a partial sectional view of a joint according to a seventh embodiment of the present invention.

FIG. 9 is a partial cross-sectional view of a joint according to an eighth embodiment of the present invention.

FIG. 10 is a diagram showing a ninth embodiment of the present invention.

FIG. 11 is a view for explaining a preferable structure in a joint portion.

FIG. 12 is a view for explaining a preferable fiber amount of each layer at each position of the joint portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Small diameter rod pipe, 5, 6, 7, 22, 35 ... Reinforced prepreg 11 ... Large diameter rod pipe, 15, 16, 17, 20, 23, 40
... Reinforcing prepreg.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B019 AA10 AB15 AB22 4F205 AD04 AD16 AG08 AH02 HA02 HA23 HA33 HA37 HA45 HB01 HC05 HC16 HC20 HG04 HK02 HK04 HK05 HK17 HL02 HL14 HT02 HT13 HT22

Claims (5)

[Claims] 1. A fishing rod having a joining portion for joining a large diameter rod tube and a small diameter rod tube, wherein a reinforcing prepreg in which reinforcing fibers are inclined is wound around the joining portion. fishing rod. 2. The fishing rod according to claim 1, wherein the reinforcing fibers of the reinforcing prepreg are aligned in a cross shape. 3. A reinforcing prepreg, in which reinforcing fibers are aligned in an inclined direction, is wound around a joint portion of the large-diameter rod tube and a joint portion of the small-diameter rod tube, and the reinforcing fibers of both prepregs cross each other. The fishing rod according to claim 1, wherein the fishing rod is used. 4. The reinforcing fiber according to claim 1, wherein the reinforcing fiber is substantially ±
3. The arrangement according to claim 2, wherein the alignment is at 45 degrees.
Or the fishing rod according to 3. 5. The reinforcing prepreg is laminated with a glass fiber woven fabric.
The fishing rod according to any one of the above.