JPH1066482A - Fishing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently ensure bending strength of a fishing rod having a through hole even a thickness of a thickened part is restricted. SOLUTION: This inside-threading type fishing rod has a butt 1 comprising the first butt side rod body 4 constituting a zoom mechanism and a second butt side rod body 5 elastically received in the first butt side rod body 5. The second butt side rod body 5 has a tapering off pipy rod main body 5a, a thickened part 6 and a line guiding hole 7. The rod main body 5a is a pipy material made of a carbon fiber reinforced resin using a prepreg of a carbon fiber base matgrial in at least a part. The thickened part 6 is formed on the rod main body 5a and is made of a carbon fiber reinforced resin using a prepreg in which a tensile elastic modulus of the fibers in the carbon fiber base material is higher than the prepreg used in the rod main body 5a. The line guiding hole 7 is formed on the peripheral face of the thickened part 6 through an inner and outer peripheries.

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 through hole formed in a peripheral surface thereof so as to penetrate the inner and outer peripheries, such as a fishing rod.

[0002]

2. Description of the Related Art A fishing line path through which a fishing line can be inserted is formed inside a rod body of a through-hole rod, and a fishing line wound around a reel is introduced on the peripheral surface of the rod body into the fishing line path. A thread introduction hole is formed in the hole. When such a thread introduction hole penetrating the inner and outer peripheries is formed in the rod body, the bending strength of the rod body at the portion where the thread introduction hole is formed decreases. Conventionally, in order to suppress a decrease in bending strength of the rod body in the portion where the thread introduction hole is formed, a thickened portion is formed in the portion where the thread introduction hole is formed so as to be thicker than other portions. The overlay portion is formed by overlaying a prepreg having substantially the same characteristics as the prepreg used for the rod body on the surface of the rod body in which the thread introduction holes are formed.

[0003]

In order to suppress a decrease in the bending strength of the portion where the yarn introduction hole is formed, if the overlaid portion is formed with a prepreg equivalent to a prepreg used for a rod, the thickness of the overlaid portion is reduced. It is much thicker than other parts. For this reason, when the thread introduction hole is formed in the former rod, there is no comparative problem. However, in the case where the thread introduction hole is formed in the rod body whose wall thickness is limited, the above-described conventional configuration cannot suppress a decrease in bending strength. For example, when the thread introduction hole is formed in the storage rod body stored in the hand side rod body such as the former upper rod stored in the former rod or the tip side rod body of the zoom type former rod, Since the gap between the inner peripheral surface of the side rod body and the outer peripheral surface of the storage rod body is small, the thickness of the built-up portion is limited. For this reason, in the case where the thread introduction hole is formed in the storage rod body, if the above-described conventional configuration is employed, the thickness of the built-up portion becomes thin, so that sufficient bending strength cannot be ensured.

[0004] It is an object of the present invention to provide a fishing rod in which a through-hole is formed so that a sufficient bending strength can be ensured even when the thickness of a built-up portion is limited.

[0005]

A fishing rod according to the present invention comprises:
It has a rod body, a built-up portion, and a through hole. The rod body is a hollow body made of carbon fiber reinforced resin using a prepreg of a carbon fiber base material at least in part. The built-up portion is made of a carbon fiber reinforced resin using a prepreg having a higher tensile modulus of fiber of a carbon fiber base material than a prepreg used for the rod body, formed on the rod body. The through hole is formed in the peripheral surface of the built-up portion so as to penetrate the inner and outer circumferences.

In this case, since a material having a higher tensile elasticity than that of the rod body is used in the build-up portion, it has been confirmed by an experiment that a prepreg obtained by laminating a material having a high tensile elasticity on a lower tensile elasticity is used. It was found that the bending strength of the laminated product was higher than that of the laminated prepreg having the same tensile modulus. For this reason, even if a prepreg thinner than the conventional one is used for the built-up portion, the bending strength is hardly reduced, and sufficient bending strength can be secured even if the thickness of the built-up portion is limited.

A fishing rod according to a second aspect of the present invention is the fishing rod according to the first aspect, wherein the prepreg used for the rod body has a tensile elastic modulus of 10.0 ton / mm ² or more and 50 ton / mm ² , and is used for a built-up portion. Prepreg has a tensile modulus of 2
3 ton / mm ² or more 55ton / mm ² or less.
The tensile modulus of the prepreg used for the rod body is 10.0
When the ratio is less than ton / mm ² , the bending rigidity of the rod body is low, and it is difficult to produce a tone and the rod becomes heavy. On the other hand, if it exceeds 50 ton / mm ² , the stiffness increases, but the prepreg itself of the fiber having an ultra-high tensile elasticity has low bending strength, so that the fiber is easily broken.
If the tensile modulus of the prepreg used for the overlay is less than 23 ton / mm ^{2, the} bending rigidity becomes too low unless the thickness of the overlay is increased. Also, 55t
If it exceeds on / mm ² , the rigidity is increased, the build-up portion is hardly bent, and the bending strength is also weak.

A fishing rod according to a third aspect of the present invention is the fishing rod according to the second aspect, wherein the tensile elastic modulus of the prepreg used for the rod body is 23 ton / mm ² or more and 31.5 ton / mm ² , and is used for the overlay. Prepreg has a tensile modulus of 2
It is not less than 8.5 ton / mm ^{2 and not} more than 42 ton / mm ² . The tensile modulus of the prepreg used for the rod body is 23
If it is ton / mm ² or more 31.5ton / mm ^2,
The bending stiffness of the rod body becomes higher and it becomes smoother and lighter. Further, the tensile elastic modulus of the prepreg used for the overlay portion is 28.5 ton / mm ² or more and 42 ton / mm ^2.
When it is below, the bending rigidity can be maintained even without increasing the thickness of the build-up portion, the rigidity does not become too high, and the build-up portion is more easily bent.

A fishing rod according to a fourth aspect of the present invention is the fishing rod according to any one of the first to third aspects, wherein the fishing rod is a hollow rod through which a fishing line can be inserted into the rod body, and the through-hole has a fishing line. Thread introduction hole for introduction into the inside of the rod body. In this case, sufficient bending strength can be ensured even if the thickness of the build-up portion of the yarn introduction hole forming portion is limited.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a boring rod according to an embodiment of the present invention has a main rod 1 and a tip-side rod unit 2 mounted on the main rod 1. The main rod 1 has a zoom mechanism 3 whose length can be changed as needed. The zoom mechanism 3 includes a first proximal rod 4 and a first proximal rod 4.
And a second hand-side rod body 5 that is inserted into the inside of the first hand-side rod body 4 so as to be extendable and contractible.

The first hand-side rod body 4 has a rod body 4a formed in a slightly tapered cylindrical shape. A reel sheet 11 on which the reel 10 is mounted is formed on one surface of the rod body 4a. Also, a butt plug 1 is provided at the bottom of the rod of the rod body 4a.
2 is installed. The second proximal rod body 5 is a rod body 5a formed in a tapered cylindrical shape similar to the first proximal rod body 4.
, A built-up portion 6 and a thread introduction hole 7. The outer diameter of the rod end of the rod body 5a is larger than the inner diameter of the rod tip of the rod body 4a. As a result, in the extended state (not shown), the second proximal rod body 5 does not come off from the first proximal rod body 4, and the first proximal rod body 4 and the second proximal rod body 5 are fixed. You. Rod body 4
A and 5a are obtained by winding a prepreg tape and a prepreg sheet in which a high-strength fiber base material such as a glass fiber base material or a carbon fiber base material is impregnated with a resin around a mandrel and firing. Here, the tensile modulus of the fiber of the prepreg of the carbon fiber base material used for the rod bodies 4a and 5a is, for example, 3
0 ton / mm ² . The tensile modulus is 10.
May be in the range of 0~50ton / mm ^2, more preferably be in the range of 24~30ton / mm ^2.
When the tensile elastic modulus of the prepreg used for the rod bodies 4a and 5a is less than 10.0 ton / mm ² , the bending rigidity is low and the tone is hard to appear and the weight is heavy. In addition, 50 ton / mm ²
If it exceeds, the stiffness increases, but the prepreg itself of the fiber having an ultra-high tensile modulus has a low bending strength, so that the fiber is easily broken.

The padding portion 6 is provided to suppress a decrease in bending strength of the rod body 5a due to the provision of the thread introduction hole 7. The overlay 6 is, as shown in FIG.
It is formed so as to be thickened on the pole tip side of a. The overlaid portion 6 is made of a prepreg having a higher tensile modulus of fiber than a prepreg of a carbon fiber base material used for the rod body 5a.
It was obtained by winding on a prepreg. Here, the tensile modulus of the prepreg of the carbon fiber used for the build-up portion 6 is, for example, 40 ton / mm ² . The tensile elastic modulus of the prepreg used for the build-up portion 6 may be higher if the tensile elastic modulus of the fiber is higher than that of the prepreg of the carbon fiber base material used for the rod body 5a.
In the range of 3 to 55 ton / mm ² , more preferably ² ton / mm 2
8.5ton / mm ² may be in the range of ~42ton / mm ^2. If the tensile modulus of the prepreg used for the build-up portion 6 is less than 23 ton / mm ^{2, the} bending rigidity becomes too low unless the thickness of the build-up portion 6 is increased. On the other hand, if it exceeds 55 ton / mm ² , the rigidity is increased, the build-up portion 6 is hardly bent, and the bending strength is also weak.

The line introduction hole 7 is a through hole for introducing the fishing line L from the reel 4 into the rod body. Thread introduction hole 7
Is formed in an oval shape along the axial direction on the front outer peripheral surface of the build-up portion 6. In addition, a thread guide 22 is mounted on the outer peripheral surface of the rear part of the thread introduction hole 7 of the overlay 6. The thread guide 22 has a leg 23 attached to the padding portion 6 and a thread insertion portion 24 attached to the tip of the leg 23, and both are fixed in relation to the thread introduction hole 7. In a given relationship. That is, the yarn introduction hole 7 and the yarn guide 22
The axial distance between does not change. A thread insertion hole 25 is formed in the thread insertion section 24. Hard edges 26a and 26b made of ceramic for guiding the fishing line are attached to the edge of the line introduction hole 7 and the edge of the line insertion hole 25 of the line guide 22.

As shown in FIG. 1, the tip side rod body unit 2 has a topmost first rod 31 having a top guide 30.
A second rod 32 that supports the first rod 31 and can be stored therein, and a third rod that can store the second rod 31 inside and can be inserted into the second hand-side rod body 5 33. In this manner, 3 constituting the tip side rod body unit 2
The poles 31, 32, 33 of the book are connected in a swing-out manner.
An internal path P through which the fishing line L is inserted is formed inside these rods.

FIG. 2 shows the structure of the rear end of the tip-side rod unit 2. FIG. 2 shows a state in which the tip side rod body unit 2 is stored. A cylindrical elastic holder 35 is screwed to the rear end opening of the third rod 33. A hard ring 26c is provided at the rear end opening of the elastic holder 35.
Is installed. The rear end of the first rod 31 is inserted into the elastic holder 35,
The rear end of the second rod 32 is in contact with the front end of the second rod. In addition,
Hard rings 26d and 26e for guiding fishing line are mounted on the rear end openings of the first rod 31 and the second rod 32, respectively.

In the structure of such an embodiment, the second
The opening portion of the thread introduction hole 7 of the hand side rod body 5 is reinforced by the built-up portion 6. The overlay 6 is a second hand side rod 5
Is obtained by winding a prepreg of a carbon fiber base material having a higher tensile modulus of fiber than the rod body 5a on the rod body 5a. For this reason, the bending strength greatly increases with respect to the wall thickness, and a decrease in the bending strength can be suppressed without increasing the wall thickness.
Therefore, even if the rod body is housed in the first proximal rod body 4 like the second proximal rod body 5 and has a limited wall thickness, the bending strength of the thinly built-up portion 6 is sufficient for the bending strength. Can be secured. Further, since the build-up portion 6 can be made thin, the weight of the fishing rod can be reduced.

[Other Embodiments] (a) The present invention is not limited to a through rod,
The present invention can be applied to all fishing rods having a through hole formed in the peripheral surface. (B) It is not necessary that the entire rod body on which the built-up portion 6 is formed is made of a carbon fiber base material, and it is sufficient that the carbon fiber base material is used at least in part.

[0018]

EXAMPLE A mandrel having a diameter of 12.5 mm (for boat fishing) and a diameter of 16 mm (for shore fishing) was prepared, and a fiber reinforced resin including a built-up portion was sequentially wound thereon, and then fired to obtain a cylindrical shape. When a rod is obtained and its outer periphery is used for boat fishing, 4
A through hole having a diameter of 20 mm and a length of 20 mm was formed. In the case of surf fishing, a through hole having a diameter of 8 mm and a length of 40 mm was formed, the breaking load of each was measured, and the bending strength was calculated. .

More specifically, when manufacturing a fishing rod, first, a mold release agent made of wax or the like is applied to the outer periphery of a 12.5 mm diameter mandrel, and then a glass is applied to the outer periphery of the mandrel. A prepreg sheet of a fiber base material was wound with the fiber direction along the axial direction of the mandrel to form two layers.
The tensile modulus of the fiber of the glass fiber substrate prepreg is 8 (actually 8.3 to 8.7) ton / mm ² . Next, a prepreg sheet of a carbon fiber substrate was wound with the fiber direction along the axial direction of the mandrel. Further, a prepreg tape of a carbon fiber base material was wound with the fiber direction along the circumferential direction of the mandrel. The tensile modulus of the fiber of these carbon fiber base prepregs is 24 (actually 23 to 26).
ton / mm ² . This completes the fishing rod body.

When manufacturing a rod for surf fishing, first,
A release agent made of wax or the like is applied to the outer periphery of a 6 mm diameter mandrel, and then a prepreg sheet of a glass fiber base material is wound around the outer periphery of the mandrel with the fiber direction along the axial direction of the mandrel. Formed. The tensile modulus of the fiber of the prepreg of the glass fiber base material is 8 (actually, 8.3).
８8.7) ton / mm ² . Next, a prepreg sheet of a carbon fiber base material using a fiber having a tensile modulus of 30 (actually 28.5 to 31.5) ton / mm ² is wound one layer with the fiber direction along the axial direction of the mandrel. , And 35 (actually 33.0 to 37.0) ton / mm ²
A prepreg sheet made of a carbon fiber base material using fibers having a tensile modulus of 3 is drawn with the fiber direction along the axial direction of the mandrel.
Layer wound. On this, a prepreg tape of a carbon fiber base using fibers having a tensile elasticity of 24 ton / mm ² was wound with the fiber direction along the circumferential direction of the mandrel. This completes the rod body for surf fishing.

A large number of these rod bodies for boat fishing and surf fishing are prepared, and 24 ton /
mm ² and 30 ton / mm ² , and 30 ton / mm ²
And 40 (actually 38 to 42) ton / mm ² , two types of prepregs for boat fishing and surf fishing, each having a different number of layers of tensile elasticity, are wound around the above-mentioned rod body, and polyethylene terephthalate ( PET) or polypropylene (P
A shape-retaining tape made of P) or the like was wound and fired by a conventional method. Then, a through-hole having the above-described dimensions was formed in the obtained rod body, and the breaking load was measured according to the bending test method of carbon fiber plastic of JIS K7074.
Table 1 shows the measurement results of the breaking load, the calculation results of the bending strength based on the breaking load, and the calculation results of the bending strength with respect to the wall thickness. Here, instead of using a plate as a test material, a pipe-shaped rod obtained in the above-described process was used, and a test was performed using a four-point bending test apparatus. The distance between the fulcrums is 300 mm,
The spacing between the indenters is 160 mm. Further, a drum-shaped roller having a circular central concave portion was used as an indenter.

For boat fishing [Example A] Carbon fiber base prepreg (tensile elastic modulus 3
0 ton / mm ² ) wound on a two-layer rod body. Outer diameter 14.74mm, wall thickness 1.12mm. [Example B] Carbon fiber base material prepreg (tensile modulus 3
0 ton / mm ² ) wound on a four-layer rod body. Outer diameter 15.65mm, wall thickness 1.575mm.

[Conventional Example A] A carbon fiber base material prepreg (tensile modulus of elasticity: 24 ton / mm ² ) wound on a two-layer rod body. Outer diameter 14.69mm, wall thickness 1.096mm. [Conventional Example B] Carbon fiber base prepreg (tensile modulus 2
4 ton / mm ² ) wound on a four-layer rod body. Outer diameter 15.6mm, wall thickness 1.55mm.

For surf fishing [Example C] Carbon fiber base prepreg (tensile modulus 4
0 ton / mm ² ) wound on a two-layer rod body. Outer diameter 18.04mm, wall thickness 1.020mm. [Example D] Carbon fiber base material prepreg (tensile modulus 4
0 ton / mm ² ) wound on a four-layer rod body. Outer diameter 18.84mm, wall thickness 1.420mm.

[Conventional Example C] A carbon fiber substrate prepreg (tensile modulus of elasticity: 30 ton / mm ² ) wound on a two-layer rod body. Outside diameter 18.13mm, wall thickness 1.065mm. [Conventional Example D] Carbon fiber base material prepreg (tensile modulus 3
0 ton / mm ² ) wound on a four-layer rod body. Outer diameter 18.96mm, wall thickness 1.48mm.

[0026]

[Table 1]

As is clear from Table 1, the bending strength / thickness value of the embodiment in which the tensile elastic modulus of the build-up portion is high is lower than that of the conventional example in both the case of boat fishing and the case of surf fishing. Has become significantly larger. For example, in the case of two layers for boat fishing, the embodiment increases by 7.1% as compared with the conventional example, and in the case of four layers, it increases by 7.5%. In the two layers for surf fishing, it is increased by 7.0%, and in the four layers, it is increased by 6.4%. Therefore, in the four embodiments, the thickness can be reduced by about 6.4 to 7.5% while maintaining the bending strength at the same value as the conventional example.

[0028]

In the fishing rod according to the present invention, the bending strength is hardly reduced even if a thinner prepreg is used for the overlaying portion, and the bending strength is sufficiently increased even if the thickness of the overlaying portion is limited. Will be able to secure.

[Brief description of the drawings]

FIG. 1 is a side view of a fishing rod according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of the yarn introduction hole.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 original rod 5 second proximal rod body 5a rod body 6 overlay 7 thread introduction hole

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29L 31:52

Claims (4)

[Claims] 1. A hollow rod body made of carbon fiber reinforced resin using a prepreg of a carbon fiber base material at least partially, a carbon fiber base formed on the rod body, and a prepreg used for the rod body. A fishing rod comprising: a built-up portion made of carbon fiber reinforced resin using a prepreg having a high tensile modulus of fiber of a material; and a through-hole formed through the inner and outer peripheries of a peripheral surface of the built-up portion. 2. A prepreg used for said rod body.
Tensile modulus is 10.0 ton / mm ^Two50ton /
mm^TwoThe following is a prepreg used for the overlay.
The tensile modulus of the rubber is 23 ton / mm^Two55 to
n / mm^TwoThe fishing rod according to claim 1, wherein: 3. The prepreg used in the rod body has a tensile modulus of elasticity of at least 23 ton / mm ^{2 and at} least 31.5 ton / mm.
mm ² or less, and the tensile elastic modulus of the prepreg used for the overlay portion is 28.5 ton / mm ² or more.
3. The fishing rod according to claim 2, wherein the fishing rod is ton / mm ² or less. 4. The fishing rod according to claim 1, wherein the fishing rod is a hollow rod through which a fishing line can be inserted into the rod body, and the through hole is a line introduction hole for introducing a fishing line into the rod body. 4. The fishing rod according to any one of items 1 to 3.