JP3515892B2 - Fishing rod - Google Patents

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 laminated rod tube formed by winding a prepreg formed by impregnating reinforcing fibers with a synthetic resin.

[0002]

2. Description of the Related Art In general, a rod rod of a fishing rod is wound around a cored bar so that various prepregs are polymerized, and cellophane tape is wound around the cored bar to stabilize it, and then the rod is introduced into a heating furnace. Heat cure synthetic resin, then cool, de-core,
It is created through processes such as cellophane tape peeling, polishing, and painting.

The characteristics of the rod tube produced in this manner change depending on the type and alignment direction of the reinforcing fibers constituting the prepreg, the thickness and winding mode of the prepreg, the resin impregnation amount, and the like. Therefore, in the case of a fishing rod that is used by passing the fishing line through the rod pipe, in order to maintain the softness of the rod pipe while securing a large inner diameter of the tip rod pipe to reduce the sliding resistance between the fishing line and the rod pipe. In addition, a rod tube as disclosed in, for example, JP-A-9-65800 is known.

In this rod tube, a main body prepreg made of carbon fiber having a low tensile elastic modulus (hereinafter, referred to as elastic modulus) is reinforced fiber is wound, and a triangular prepreg shorter than the main body prepreg is wound on the base side. It is made up by winding.

[0005]

When forming a rod tube, a rod tube having a soft tone and being easily bent can be obtained by using the low elasticity fiber reinforced prepreg as described above. There are drawbacks.

The low elastic modulus carbon fiber has a large linear expansion coefficient as compared with the high elastic modulus carbon fiber, so that material bending is likely to occur at the time of formation, and the strength tends to be low, so that the carbon fiber is easily damaged. . In particular, when a triangular prepreg having different elastic moduli is wound around the original side, the material bends further, and there are drawbacks such as being unusable for practical use and requiring correction of the bend. An object of the present invention is to provide a fishing rod that has a rod tube that is easily bent (flexible), has stable strength, and is resistant to material bending.

[0007]

In order to solve the above problems SUMMARY OF THE INVENTION The fishing rod of the present invention is a fishing rod comprising a rod pipe formed winding a prepreg impregnated with a synthetic resin to reinforcing fibers, before
Kisaokan, from the number of turns of the prepreg of the tip portion of the rod pipe, an auxiliary prepreg to increase the number of turns of the prepreg at the rear end, the auxiliary prepreg, each turn of the rolling or
The position of the tip may shift in the axial direction for each number of turns.
Formed by a staircase sheet with multiple windings
It is characterized by being done.

The auxiliary prepreg is a tip portion of the rod tube.
From the maximum width part of the main body prepreg that winds from the
Increase the number of turns more than the number of turns
Each auxiliary prepre divided into these multiple sheets
The number of windings is the maximum width of the main body prepreg.
It is preferably less than the number.

The auxiliary prepreg is a tip portion of each winding portion.
Is preferably wound orthogonally to the axial direction.
Yes.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention. FIG. 1 shows an example of the arrangement of prepregs forming a rod tube used for a fishing rod, FIG. 2 shows an example of a winding mode of the prepregs, and FIG. 3 shows partial cross sections of the formed rod tube, respectively.

The rod tube 1 is formed by winding a plurality of kinds of prepregs in which reinforcing fibers are impregnated with synthetic resin so as to be polymerized on a core metal 3, and introducing the prepreg into a heating furnace to thermally cure the synthetic resin. It is created through steps such as cooling and core removal. In this case, each prepreg has a modulus of elasticity of 0.1 to
Carbon, boron, glass, organic fiber or the like having an nf / mm ^{2 to} 90 tonf / mm ² is used, and an epoxy resin or the like is used as the impregnated synthetic resin.

As shown in FIG. 1, when the rod pipe is used as a hollow rod, the core metal 3 is subjected to a treatment for forming a fishing line guide portion. First, the tape 5 having a predetermined width is spirally wound around the core metal 3 to form an uneven portion on the core metal 3. Next, the ultrathin tape 6 is wound around the recessed portion, and the guide member 7 (for example, metal or synthetic resin, or organic fibers, ceramics, carbon bundles, etc. is impregnated with synthetic resin over the ultrathin tape. The prepreg is wound on top of it, and then various prepregs are wound on it. Then, after the core is removed, the tape 5 and the ultra-thin tape 6 are removed so that the spiral fishing line guide portion 7a is formed on the inner peripheral surface of the rod pipe by the guide member 7 as shown in FIG. Is formed by.

By interposing the ultra-thin tape 6 as described above, the fishing line guide portion 7a is formed in an arc shape, so that the fishing line can be prevented from being scratched. Further, in the configuration shown in the figure, the fishing line guide portion 7a is formed as a protrusion having a height smaller than the wall thickness of the rod pipe. It is possible to prevent hitting. It should be noted that when the rod tube of the hollow rod is created, various means can be used to form the fishing line guide portion, and the fishing line guide portion is not limited to the above-described means.

The rod pipe 1 is constructed by winding a main body prepreg (main body layer) that defines the entire length of the rod pipe and an auxiliary prepreg (reinforcing layer) that reinforces the base portion side of the rod pipe except the tip portion. It The main body prepreg has a first prepreg 10 in which reinforcing fibers are aligned in the axial direction and cut so that two plies are respectively formed on the front end side and the proximal end side, and a prepreg 12a in which the reinforcing fibers are aligned in the axial direction. Is lined with a prepreg 12b in which reinforcing fibers are aligned in the circumferential direction,
The second prepreg 12 is cut so that three plies are formed on each of the front end side and the base end side. Further, the auxiliary prepreg is provided inside the main body prepregs 10 and 12, and includes two stepped auxiliary prepregs 15 and 25 in which reinforcing fibers are aligned in the axial direction.

Each of the auxiliary prepregs 15 and 25 of this embodiment has three winding portions 17, 18, 19 and 27, 28, 29 which are wound by one ply, and each winding portion 17 is wound. Nos. 19 and 27 to 29 are cut so that the lengths in the axial direction are different. That is, as shown in the drawing, each of the auxiliary prepregs 15 and 25 has a tip portion 17a, 18a, 19a and 27a, 28a, 2 thereof.
9a is cut so that its position shifts in the axial direction for each winding. Therefore, the formed rod tube has the auxiliary prepregs 15, 2 in a stepwise manner from the middle portion to the end portion.
5 increases the thickness of the reinforcing layer.

In the above-mentioned arrangement example of the prepreg, as shown in FIG. 2, first, the auxiliary prepregs 15 and 25 are wound around the core metal 3. Then, the first prepreg 10 is superposed on the inside of the second prepreg 12, and this is wound from above the auxiliary prepregs 15 and 25. in this case,
After the second prepreg 12 is made one ply, the polymerized first prepreg 10 and the second prepreg 12 are made two plies. Therefore, in the main body layer formed of the main body prepreg, the inner layer side is the circumferential reinforcing fiber layer. The auxiliary prepregs 15, 25 and the main body prepreg 10,
The second prepreg 12 may be wound after the first prepreg 10 is wound, and the second prepreg 12 is wound.

A splicing portion forming prepreg 35 is wound around the outer periphery of the second prepreg 12 on the base end side. This prepreg 35 is configured by lining a woven fabric 35b on a prepreg 35a in which reinforcing fibers are aligned in the axial direction, and constitutes a joint portion (thick wall portion) of front and rear rod pipes. The joining prepreg 35 may be partially overlapped with the second prepreg 12 and wound at once.

Auxiliary prepregs 15, 25 having the above structure
By using, the rear end of the rod tube is 6
The number of turns increases, and the wall thickness gradually increases in the middle part thereof toward the rear end. With such a configuration, the formed rod tube can be easily bent by reducing the rigidity of the tip portion, and moreover, the deflection balance from the tip portion to the base portion can be improved. In addition, since the wall thickness gradually increases from the front portion to the base portion, variations in strength are prevented and strength can be improved.

In the above structure, each auxiliary prepreg 1
It is preferable that the wall thicknesses of 5 and 25 be such that the wall thickness can be gradually increased toward the rear end portion. In particular,
It should be 0.05 mm or less, preferably 0.03 mm or less. By winding a large number of such thick prepregs to gradually increase the thickness, it is possible to reduce sudden changes in the thickness and movements of the reinforcing fibers, and to effectively prevent material bending.

The above effect can be achieved by using an auxiliary prepreg and gradually increasing the number of windings toward the rear end portion, but in order to obtain a certain number of steps, It is preferable that the auxiliary prepreg is formed so that the number of windings at the rear end of the rod tube is 3 or more than the number of windings at the tip, or more than the number of windings of the main body prepreg.

As described above, the winding portion of the auxiliary prepreg may be displaced in the axial direction with each winding, or may be displaced in the axial direction with each winding. It may be configured as follows. In this case, it is preferable that the number of windings is less than the number of windings (maximum width) of the main body prepregs 10 and 12. In this way, by increasing the number of windings of the auxiliary prepreg and reducing the number of windings (width) of each winding part, the reinforcing fiber is inclined with respect to the axis of the rod tube or is displaced during winding. It is possible to reduce the occurrence of bending and prevent the occurrence of material bending. In addition, the thickness of the original side can be gradually increased to prevent variations in strength and improve strength,
Further, the deflection balance from the tip portion to the base portion is improved, and a rod tube having an excellent condition can be obtained.

The auxiliary prepreg having the winding portion as described above may be constituted by one or more step-like sheets as shown in the figure, and for example, a plurality of sheets may be provided for each winding portion. It may be divided into two parts, and these may be independently wound, or the adjacent winding parts may be overlapped and wound. By forming the auxiliary prepreg into a step-like sheet, the winding work can be facilitated and the occurrence of material bending can be suppressed more effectively. Further, the position where the auxiliary prepregs 15 and 25 as described above are arranged is at the main body prepreg 1
0, 12 is placed on the outer layer side, or the main body prepreg 10,
Although it can be arranged between the 12 layers, as shown in the figure, the material bending can be effectively prevented by disposing it on the inner layer side of the main body prepreg.

The auxiliary prepregs 15 and 25 are
Tip portions 17a to 19a and 27a to 29a of each winding portion
However, it is preferable that they are wound orthogonally to the axial direction. In this way, the tip of each winding part is made orthogonal to the axial length direction, and by gradually shifting in the axial length direction and winding, the cause of material bending due to wall thickness change is suppressed and reliable bending is prevented. You can In this case, the tip portion 1 of each winding portion
It is preferable that 7a to 19a and 27a to 29a be evenly spaced in the axial direction.

The rod tube 1 is formed by winding the prepreg having the above-described structure around the core metal 3 and performing steps such as heating, decoreing, polishing and painting. In this case, the core metal 3 is the rod tube 1
It is preferable that the inner shape of the outer peripheral shape is a straight shape or a tapered shape of 1.5 / 1000 or less. By making the inner shape of the rod tube 1 as described above, the balance between tone and strength can be achieved, and the original side can be made thinner. Further, when the next rod pipe is joined to the base portion of the rod pipe, the difference in rigidity between the rod pipes before and after the rod pipe can be easily reduced, and the flexural balance can be improved. further,
The tip of the rod pipe can be made relatively thick, and particularly when it is used for a hollow rod, the hollow portion inside the rod pipe can be enlarged to the tip portion, and the fishing line can be smoothly guided.

In the above construction, the main body prepreg (first prepreg 10, second prepreg 12) and the auxiliary prepregs 15 and 25 are preferably constructed as follows.

The reinforcing fiber of the first prepreg 10 has low elasticity, specifically, an elastic modulus of less than ²⁰ tonf / mm ² .
Preferably 10 tonf / mm ² or less, more preferably 0.1
tonf / mm ^{2 to 5} tonf / mm ² is used, and the reinforcing fiber of the second prepreg 12 and the auxiliary prepregs 15 and 25 has a higher elasticity than the elastic modulus of the reinforcing fiber of the first prepreg 10, specifically, Has an elastic modulus of 15 tonf / mm ² or more,
It is preferably about ²⁰ tonf / mm ² to 30 tonf / mm ² . As described above, by using the prepreg made of the low-elasticity reinforcing fiber, it is possible to obtain a rod tube having a large bending amount and excellent flexibility and having a soft tone, and the prepreg made of the high-elasticity reinforcing fiber is used. This makes it possible to improve the strength and prevent plastic deformation while maintaining the characteristics of the soft tone. Therefore,
When it is used for a fishing rod that passes through the fishing line, the fishing line can be smoothly guided by appropriately increasing the inner diameter of the rod tube, and large flexural characteristics can be obtained without a decrease in strength or plastic deformation.

In this case, the wall thickness of the first prepreg (low elastic reinforcing fiber prepreg) 10 is 25% or more of the wall thickness of the second prepreg (high elastic reinforcing fiber prepreg) 12 so that the flexural characteristics can be sufficiently exhibited. Preferably 40%,
More preferably, it is 50% or more. However, if the wall thickness of the low-elasticity reinforcing fiber prepreg 10 is made too thick, problems such as strength reduction and plastic deformation will occur.
It is better to set it to% or less. It should be noted that such a wall thickness relationship may be satisfied in at least a partial region of the rod tube. In the configuration shown in the figure, the thickness of the first prepreg 10 is 0.03 mm and the thickness of the second prepreg 12 is 0.02 mm.
mm, and the first prepreg 1 on the tip side
The thicknesses of 0 and the second prepreg 12 are set to be equal.

FIG. 4 is a vertical sectional view of a rod tube formed by the prepreg shown in FIG.
(B) has shown the base end side. As is clear from this cross-sectional view, on the distal end side, the first prepreg 10 and the second prepreg 12 have substantially the same wall thickness, and a large flexural characteristic is obtained, while on the proximal end side, the high elastic reinforcing fiber is used. By winding the configured auxiliary prepregs 15 and 25, the thickness of the low elastic reinforcing fiber prepreg 10 is reduced, and thus the amount of deflection is smaller than that on the tip side. However, on either side, the prepreg made of the low-elasticity reinforcing fiber is reinforced by the prepreg made of the high-elasticity reinforcing fiber, so that the strength is decreased and the plastic deformation is reduced in the state where the flexible property preferable as the rod tube is obtained. To be prevented.

The arrangement of the prepregs shown in FIG. 1 is merely an example, and each prepreg may be wound in a different order. When winding the prepregs, the prepregs may be optionally attached in advance and the prepregs may be integrally wound around the cored bar 3. In addition,
Various types of prepregs forming the rod tube may have various configurations, and are not limited to the configurations shown in the drawings.

Next, referring to the cross-sectional structure of the rod tube shown in FIGS. 5 (a) and 5 (b), the configuration on the tip end side of the rod tube will be described in more detail, and yet another aspect will be described. In these figures, (a) is a diagram corresponding to the structure shown in (a) of FIG. 4, and (b) is a diagram showing an example of another laminated structure. In each figure, reference numeral 10 represents a low-elasticity fiber layer composed of prepregs in which low-elasticity reinforcing fibers are aligned in the axial direction, and reference numeral 12 represents a high-elasticity fiber layer composed of prepregs of high-elasticity reinforcing fibers. The high elastic fiber layer 12
Is a highly elastic fiber layer 12 in which reinforcing fibers are aligned in the axial direction.
a, a high elastic fiber layer 12b in which reinforcing fibers are aligned in the circumferential direction. In addition to this, for example, as shown in FIG. 8B, a high-elasticity fiber layer 12c in which reinforcing fibers are aligned in the axial direction may be arranged on the high-elasticity fiber layer 12a.

As shown in the figure, in both the low elastic fiber layer 10 and the high elastic fiber layer 12a (12c), reinforcing fibers are aligned in the axial direction. Then, the low-elasticity fiber layer 10 and the high-elasticity fiber layer 12a (12c) in which such reinforcing fibers are aligned in the axial direction are arranged side by side so as to be in the same layer P as shown in the figure. As a result, reinforcing effects that are mutually complementary can be efficiently obtained, and the strength can be improved.

The diameter of the reinforcing fibers of the low elastic fiber layer 10 is 10 μm.
As described above, the diameter is preferably larger than the diameter of the reinforcing fiber of the high elastic fiber layer 12 (12c). By setting the diameter of the reinforcing fiber of the low elastic fiber layer 10 to 10 μm or more, the buckling strength can be increased even with the low elastic reinforcing fiber,
The strength can be improved.

The reinforcing fibers of the low-elasticity fiber layer 10 are preferably flameproofing materials or semi-carbonized organic fiber materials. By using such a material, the elongation at break becomes large, large bending is possible, and buckling failure at the time of bending is prevented, so that the rod tube is excellent in tone and strength.

It is preferable that the amount of synthetic resin impregnated in the prepreg forming the low elastic fiber layer 10 is larger than the amount of synthetic resin impregnated in the prepreg forming the high elastic fiber layer 12 (12c). By using such a prepreg, it is possible to make a rod tube with a softer tone or a large inner diameter,
A rod tube with excellent balance of tone and strength can be obtained.

The high elastic fiber layers 12a (12c) of the low elastic fiber layers 10 and the high elastic fiber layers 12 in which the reinforcing fibers are aligned in the axial direction are aligned in the circumferential direction of the reinforcing fibers. It is preferable to dispose between the aligned high elastic fiber layers 12b. With this arrangement, the fiber layers 10 and 12a (12c) in the axial direction are integrally formed so as to be wrapped between the circumferential fiber layers, so that the strength can be further improved.

The high-elasticity fiber layer 12b in which the reinforcing fibers are aligned in the circumferential direction and the high-elasticity fiber layer 12a in which the reinforcing fibers are aligned in the axial direction are thinned and superposed to form an ultrathin layer.
In this case, the thickness of the ultra-thin layer is 0.04mm-0.004mm,
Preferably 0.03 mm or less, more preferably 0.03 mm
Below. Then, the ultrathin layer 12 polymerized in this way
The a and 12b are arranged on the outer layer side and / or the inner layer side of the fiber layer (main fiber layer) mainly composed of the axial length fibers. With this configuration, a lightweight and high-strength rod tube that takes advantage of the characteristics of the main body layer can be obtained, and it is possible to reduce the wall thickness, making it a flexible rod tube that bends easily despite its large diameter. can do. Further, when it is used for a hollow rod, the inner diameter of the rod tube can be appropriately increased, and the fishing line can be smoothly guided. In this case, as shown in FIG. 3A, the main body fiber layer is made to have an elastic modulus of 20%.
By using the low-elasticity fiber layer 10 having a tonf / mm ^{2 or} less, it is possible to obtain a rod tube having a soft tone portion having a larger bending amount and excellent flexibility.

In the above-mentioned constitution, regarding the specific elastic modulus and linear expansion coefficient of the reinforcing fiber used for each prepreg, the wall thickness of the prepreg, the number of windings, the amount of resin impregnation, the amount of material used, etc. It is variously modified according to the part used (front end side, base end side, etc.) and required characteristics of the fishing rod.

Hereinafter, in the above-described embodiment, the prepreg 10 made of the low elastic reinforcing fiber constituting the rod tube is used.
(Low elastic fiber layer), prepreg 1 with high elastic reinforcing fiber
2 (high and low elastic fiber layers) and auxiliary prepregs 15, 25
The conditions of (reinforcing layer) are listed by item. (1) Linear expansion coefficient The linear expansion coefficient of the reinforcing fibers of the low elastic fiber layer is set to be higher than that of the reinforcing fibers of the high elastic fiber layer. Specifically, the linear expansion coefficient of the reinforcing fibers of the high elastic fiber layer is set to 1 × 10 ⁻⁶ / ° C. or less, and the linear expansion coefficient of the reinforcing fibers of the low elastic fiber layer is 2 × 1.
0 ^-6 / ° C or more (or 10 x 10 ^-6 / ° C to 100 x 10
^-6 / ℃ range, or 10 × 10 ^-6 / ℃ ~ 50 × 10 ^-6
/ C range). Further, the linear expansion coefficient of the reinforcing fibers of the reinforcing layer is set to 1 × 10 ⁻⁶ / ° C. or less, preferably smaller than that of the reinforcing fibers of the high elastic fiber layer. In this case, it is preferable that the reinforcing fibers of the auxiliary prepregs 15 and 25 have the same (or substantially the same) coefficient of linear expansion.

As described above, by disposing the low elastic fiber layer 10 having a large linear expansion coefficient inside the high elastic fiber layer 12, the influence of the linear expansion coefficient can be alleviated and the material bending can be effectively prevented. Further, by setting the linear expansion coefficient of each reinforcing fiber of the auxiliary prepregs 15 and 25 to be smaller than that of the high elastic fiber layer, it is possible to further reduce the influence of the linear expansion coefficient in the axial direction, etc. Material bending in the part can be effectively prevented. In addition, when the linear expansion coefficient of the auxiliary prepregs 15 and 25 is not set to be smaller than that of the high elastic fiber layer, as shown in FIG.
If 25 is provided inside the high elastic fiber layer 12,
Material bending at the base of the rod can be effectively prevented. Also,
By setting the linear expansion coefficients of the reinforcing fibers of the two auxiliary prepregs 15 and 25 to be the same (or substantially the same),
Material bending can be further prevented. (2) Elastic modulus The elastic modulus of the reinforcing fibers of the high elastic fiber layer 12 is 20 tonf / mm.
² or more, preferably 30 tonf / mm ² or more, and the elastic modulus of the reinforcing fiber of the low elastic fiber layer is less than ²⁰ tonf / mm ² , preferably 10 tonf / mm ² or less, more preferably 0.3 tonf / mm ^2.
Set within the range of tonf / mm ^{2 to} 1.9 tonf / mm ² . The elastic modulus of the reinforcing fibers of the auxiliary prepregs 15 and 25 is
It is preferably set higher than that of the reinforcing fibers of the low elastic fiber layer, and preferably higher than that of the reinforcing fibers of the high elastic fiber layer, specifically, 24 tonf / mm ² or more.

By setting the elastic moduli of the reinforcing fibers of the high elastic fiber layer and the low elastic fiber layer in this way, the rigidity of the rod tube can be adjusted in a well-balanced manner, and the flexibility of the rod tube can be improved. Further, by setting the elastic modulus of the reinforcing fibers of the auxiliary prepregs 15 and 25 wound around the base portion of the rod tube in this way, the strength balance and the tone balance between the tip portion and the base portion of the rod tube can be improved. (3) Resin Impregnation Amount (RC) The resin impregnation amount of the prepreg forming the low elastic fiber layer 10 is set to be larger than that of the prepreg forming the high elastic fiber layer 12. Specifically, the resin impregnation amount of the prepreg of the low elastic fiber layer is preferably set to 40 wt% to 80 wt% (or less than this value), and the resin impregnation amount of the prepreg of the high elastic fiber layer is 25 wt%. ~ 60wt
It is preferably set to%. Also, auxiliary prepreg 1
The resin impregnation amount of 5,25 is set to be less than that of the prepreg of the low elastic fiber layer, and preferably less than that of the prepreg of the low elastic fiber layer and the high elastic fiber layer, for example, 1
It is preferably set to 5 wt% to 35 wt%.

By setting the resin impregnation amount of the prepreg forming the low elastic fiber layer to such a large value, the bending elastic modulus of the prepreg in the axial direction (bending rigidity of the rod tube) can be reduced,
It is possible to form a rod tube that is easily bent and is not easily damaged even when it is largely bent. In addition, the auxiliary prepreg 15, 25
If the resin impregnation amount is set to such a small value, it is possible to form a lightweight rod tube having high specific rigidity. (4) Material High elastic fiber layer 12, low elastic fiber layer 10, reinforcing layers 15 and 2
The material of the reinforcing fiber of the prepreg forming 5 is arbitrary, but preferably, the prepreg forming the high elastic fiber layer uses carbon fiber, and the prepreg forming the low elastic fiber layer includes carbon fiber or flame resistant fiber or A carbon fiber is used for the auxiliary prepreg for forming the reinforcing layer by using an organic fiber such as acrylic resin. In particular, if carbon fibers are used for all the reinforcing fibers of the prepreg forming each layer, the difference in linear expansion coefficient can be reduced, and material bending can be prevented.

An epoxy resin is used as the impregnating resin of the prepreg forming each layer. (5) Strength This strength is arbitrarily changed depending on the above four conditions, but is set so as to satisfy the following conditions as a whole. That is, it is preferable to set the strength of the reinforcing fiber of the high elastic fiber layer to the maximum and use a material having a breaking elongation larger than that of the reinforcing fiber of the high elastic fiber layer as the reinforcing fiber of the low elastic fiber layer. Further, in order to increase the buckling strength of the low elastic fiber layer, it is preferable to use the reinforcing fibers of the low elastic fiber layer having a large fiber diameter. In this case, the fiber diameter is 8 μ or more and 100 μ or less, or 10 μ or more and 100 μ or less. It is desirable that the reinforcing fibers of the auxiliary prepregs 15 and 25 also have high strength.

By setting the strength of the reinforcing fibers of the low elastic fiber layer and the high elastic fiber layer in this manner, not only the strength of the rod tube can be increased, but also the flexibility can be improved. Further, if the fiber diameter of the reinforcing fibers of the low elastic fiber layer is set to be large as described above, the buckling strength can be improved even with low elasticity. (6) Number of layers and layer thickness a. The proportion of the low-elasticity fiber layer 10 is increased at the tip of the rod tube, and the high-elasticity fiber layer 12 and the reinforcing layer 1 are provided at the base of the rod tube.
Increase the ratio of 5,25. The low elastic fiber layer 10 is preferably in the range of 50 to 90% of the entire rod tube, but may be less than that.

B. In the middle part of the rod tube, the balance between tone and strength is adjusted, and the low elastic fiber layer 10 is preferably set in the range of 50 to 150% with respect to the high elastic fiber layer 12. c. It is preferable that the base portion (base end) of the rod tube has more high elastic fiber layers 12 than low elastic fiber layers 10. Further, it is preferable that the reinforcing layers 15 and 25 be more than the high elastic fiber layer 12.

By setting the number of layers and the layer thickness in this way,
Alternatively, by arbitrarily combining a to c, the deflection of the tip portion of the rod tube can be increased, the rigidity of the base portion can be increased, the tone can be improved, and the strength can be improved. (7) Diameter in the length direction and taper (core metal shape) The diameter changes depending on the position of the fishing rod such as the tip rod pipe and the main rod pipe and the type of the fishing rod, and is arbitrarily set.

The core metal for forming the taper preferably has an average taper ratio between the tip and the base end of the rod tube of 1/1000 or less, more preferably 0.5 / 1000 or less. Alternatively, in the case of a rod tube with a middle rod, the inside of the tip portion 1/3 of the entire length of the rod tube is made straight to secure a large tip inner diameter to improve the thread guiding property, or the tip portion 1/3 range. The inside is straightened and the wall thickness is gradually increased to improve the strength while restricting the increase of the outer diameter. (8) Wall thickness (t) / rod tube diameter (D) In the case of a rod tube with a through rod, t / D at the tip of the rod tube is
The relationship between the wall thickness and the outer diameter is 0.1 or less, the inner diameter of the tip portion is large, and the yarn guiding property can be improved.

In the case of the tip rod tube, the above t / D is 0.1 or less on the tip side and 0.1 on the base (front of the joint).
If it is made larger, the strength will be improved even if it flexes greatly,
Stabilization can be achieved. The above conditions (1) to (8)
Are preferably satisfied, but may be arbitrarily selected and applied.

[0048]

According to the present invention, it is possible to obtain a fishing rod having a rod tube that is easily bent (easily bent), has stable strength, and is resistant to material bending.

[Brief description of drawings]

FIG. 1 is a view showing an arrangement configuration example of prepregs forming a rod tube used in a fishing rod of the present invention.

FIG. 2 is a diagram showing a winding mode of the prepreg shown in FIG.

FIG. 3 is a view showing a partial cross section of a rod tube formed by the arrangement configuration example of the prepreg shown in FIG.

FIG. 4 is a vertical cross-sectional view of a rod tube formed by the prepreg shown in FIG. 1, where (a) is a tip side and (b) is a base side.

5 (a) and 5 (b) are cross-sectional views of the tip side of the rod tube, FIG. 5 (a) is a view corresponding to the structure shown in FIG. 4 (a), and FIG. The figure which shows an example of a structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rod 3 Core metal 10 1st prepreg (low elastic fiber layer) 12 2nd prepreg (high elastic fiber layer) 12a Prepreg (high elastic fiber layer) in which reinforcing fibers are aligned in the axial direction 12b Reinforcement fiber circumference Prepreg (high elastic fiber layer) aligned in the same direction 15,25 Auxiliary prepreg (reinforcing layer)

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-9-182545 (JP, A) JP-A-9-267403 (JP, A) JP-A-5-115235 (JP, A) JP-A-9- 117965 (JP, A) Actual development Sho 59-166662 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A01K 87/00-87/06

Claims (5)

(57) [Claims] 1. A fishing rod comprising a rod tube formed by winding a prepreg in which reinforcing fibers are impregnated with a synthetic resin, wherein the rod tube is provided at a rear end portion depending on the number of windings of the prepreg at the tip portion of the rod tube. Is equipped with an auxiliary prepreg that increases the number of windings of the prepreg.
The position of the tip may shift in the axial direction for each number of turns.
Formed by a staircase sheet with multiple windings
A fishing rod characterized by being performed . 2. The auxiliary prepreg is a tip of the rod tube.
Width part of the main body prepreg that winds from the end to the rear end
The number of turns is greater than the number of turns of
Each auxiliary prepreg divided into these pieces
Is the number of windings in the maximum width part of the main body prepreg.
The fishing rod according to claim 1, wherein the fishing rod is less than the above . 3. The fishing rod according to claim 2, wherein the auxiliary prepreg is wound on the inner layer side of the main body prepreg. 4. The auxiliary prepreg is a tip of each winding portion.
The part is wound in a direction orthogonal to the axial direction.
The fishing rod according to any one of claims 1 to 3 . 5. The auxiliary prepreg is 0.05 mm or less.
It has a lower wall thickness and it depends on the number of windings of the prepreg at the tip of the rod tube.
The number of windings at the rear end is increased by 3 or more.
The fishing rod according to any one of claims 1 to 4 .