JP2000201586A - Fishing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fishing rod free from the local lowering of strength even in the case of increasing resin impregnation of wound prepreg, capable of tenaciously responding to bending, and having low elasticity and fine tune. SOLUTION: This fishing rod is provided with a rod tube of a laminated state formed by winding a prepreg whose reinforcing fiber 1 is impregnated with a heat-curable resin 2. The rod tube comprises an outermost layer C and a tube body layer D excluding the outermost layer C. The main tube layer comprises a multi resin-layer E constituted with a prepreg of 50-70 wt.% in terms of resin impregnation, and the amount of resin impregnation of the prepreg constituting the outermost layer C is 20-37 wt.%.

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 low-elasticity and delicate fishing rod.

[0002]

2. Description of the Related Art Conventionally, depending on the type of fishing, the target fish, and the like, an extremely delicate condition is often required for a fishing rod.
In addition, at the tip of the inner rod, it is necessary to secure a space for inserting the fishing line inside and reduce the sliding resistance of the fishing line. May be required. Further, there is a case where a boat rod or the like is required to have a body condition that bends from a former rod while maintaining an outer diameter that is easy to grasp.

[0003] As a fishing rod satisfying this type of demand, a general-purpose carbon fiber (for example, having an elastic modulus of 24 ton /
mm ² ) is used as a reinforcing fiber, and a resin prepreg having a resin impregnation amount of about 35% by weight is used such that a reinforcing fiber alignment direction is angled with respect to a rod axis direction or used. Some prepregs are made thinner by reducing the basis weight.

[0004] However, in the case where the prepreg is turned so that the alignment direction of the reinforcing fibers is at an angle with respect to the axial direction of the rod, the cutting yield of the prepreg is poor.
In addition, the laminating work at the time of turning the ticket is complicated and the workability is poor. On the other hand, the thinned prepreg with a reduced basis weight has insufficient strength as a fishing rod and is easily broken.

[0005]

Therefore, it is conceivable to increase the resin amount of the fishing rod so as to reduce the elasticity of the entire fishing rod.

However, if the amount of resin impregnated in the prepreg to be rotated is increased in order to increase the amount of resin, resin flow occurs during molding, and the strength of the fishing rod is reduced. In other words, before baking, a tightening tape is applied to apply pressure from the wound prepreg, but the tightening pressure of the tightening tape needs to be equal to or higher than a predetermined value in order to prevent the occurrence of voids that cause a decrease in strength. As a result, the tightening pressure increases the resin flow, locally forming a dense portion of fibers, and eventually causing a decrease in strength. In addition, since the resin flow greatly changes depending on the tightening pressure of the tightening tape and the firing conditions, it is difficult to adjust the resin flow. Therefore, the manufactured fishing rod has insufficient strength locally and is easily damaged by bending.

In view of the above, the present invention has been made in view of the above-mentioned problems, and even if the amount of resin impregnated in a prepreg to be wound is increased, it does not cause a local decrease in strength and responds flexibly to bending. Another object of the present invention is to provide a fishing rod having low elasticity and delicate tone.

[0008]

In order to solve the above problems,
The fishing rod according to the present invention is a fishing rod comprising a rod tube 4 formed by winding a prepreg in which a reinforcing fiber 1 is impregnated with a thermosetting resin 2 and formed into a laminated shape. C and a main body layer D other than the outermost layer C. The main body layer D includes a multi-resin layer E composed of a prepreg having a resin impregnation amount of 50 to 70% by weight. The resin impregnation amount of the prepreg constituting the outer layer C is 20 to 3
7% by weight. In the fishing rod having the above configuration, since the main layer D is provided with the multi-resin layer E composed of the prepreg having a resin impregnation amount of 50 to 70% by weight, the main layer D does not have the multi-resin layer E. (For example, a layer corresponding to the multi-resin layer E is formed of a prepreg having a resin impregnation amount of about 35% by weight.)

Further, since the resin impregnation amount of the prepreg constituting the outermost layer C is 37% by weight or less, there is almost no possibility that a resin flow is generated from the prepreg itself of the outermost layer C, and the resin flows from the inner layer. Even so, the resin flow is partially absorbed and blocked by the outermost layer C, and there is almost no risk of resin flow occurring during molding. On the other hand, if the amount of resin impregnated in the prepreg constituting the outermost layer C is 20% by weight or more, the amount of resin that bonds the fibers to each other is secured, and the occurrence of surface cracks is also prevented.

Further, in the fishing rod according to the present invention, it is preferable that the multi-resin layer E is close to the outermost layer C, as described in claim 2.

When the multi-resin layer E is close to the outermost layer C,
The outermost layer C absorbs the resin 2 from the multi-resin layer E, and the integration between the multi-resin layer E and the outermost layer C is improved.

Further, in the fishing rod according to the present invention,
As described in claim 3, the main body layer D may be composed of an innermost layer A located on the innermost side and an intermediate layer B excluding the innermost layer A.

[0013] In the fishing rod according to the third aspect, it is preferable that the prepreg constituting the innermost layer A has a resin impregnation amount of 20 to 37% by weight. In the fishing rod having the above-described structure, the resin impregnated amount of the prepreg constituting the innermost layer A is set to 37% by weight or less, thereby preventing the localization of only the resin 2 in the innermost layer A. Floating, waving, meandering, or unevenness of the fiber 1 due to excessive resin flow in the inner layer A is prevented, and the fishing rod has no local change in elastic modulus.

Further, by setting the amount of resin impregnated in the prepreg constituting the innermost layer A to 20% by weight or more, it is possible to prevent the fibers 1 from remaining on the mandrel 3 and the occurrence of cracks from the inner surface during core removal. You.

[0015] In the fishing rod according to the third aspect, the innermost layer A is such that the reinforcing fibers 1 are formed in the circumferential direction S.
It may be one that is aligned to 1. With this configuration, even when the fishing rod is deformed such that the cross section of the rod tube 4 is crushed into an elliptical shape, such as when the fishing rod is bent, the innermost layer A that is easily subjected to a compressive force is formed by the rod tube 4. By the reinforcing fibers 1 aligned in the circumferential direction S1, the compression crush and deformation are prevented.

Further, in the fishing rod according to the third aspect,
As described in claim 6, it is preferable that the resin impregnation amount of the prepreg constituting the intermediate layer B is 50 to 70% by weight on average. By adopting such a configuration, the molded rod tube 4 has a higher resin ratio than a prepreg having a resin impregnation amount of about 35% by weight.
It has low elasticity. Therefore, a fishing rod provided with such a rod tube becomes a delicate fishing rod. Here, the phrase “the resin impregnation amount is 50 to 70% by weight on average” means that, when the intermediate layer B has one prepreg, the resin impregnation amount of the prepreg is 50 to 70% by weight. Means
In the case of two or more sheets, it means that the resin impregnation amount of all the prepregs constituting the intermediate layer B is 50 to 70% by weight on average.

Further, in the fishing rod according to the sixth aspect, as in the seventh aspect, the thickness of the intermediate layer B is at least twice the total thickness of the outermost layer C and the innermost layer A. Is preferred. By adopting such a configuration, the properties of the rod tube 4 are greatly influenced by the intermediate layer B, and the rod tube 4 has extremely low elasticity.
It becomes a fishing rod with.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a fishing rod according to the present embodiment. The fishing rod comprises a plurality of rod pipes 4 connected in a swinging manner.
As shown in FIG. 2, the rod pipe 4 is a general-purpose carbon fiber 1 (for example, the elastic modulus is 24 ton / mm ² ) as a reinforcing fiber.
A prepreg impregnated with an epoxy resin 2 as a thermosetting resin is wound around a mandrel 3 to form a laminated rod tube 4 having a main body layer D including an intermediate layer B and an innermost layer A and an outermost layer C. It is molded.

The carbon fibers 1 in the used prepreg are aligned in a certain direction, and the prepregs constituting the innermost layer A and the outermost layer C are aligned in a direction in which the carbon fibers 1 are aligned.
The prepreg, which is wound so as to be in the circumferential direction S1 of the rod pipe 4 and constitutes the intermediate layer B, has a direction in which the carbon fibers 1 are aligned.
It is wound so as to be in the axial center direction S2 of the rod tube 4.

The innermost layer A and the intermediate layer B are formed by winding a prepreg sheet. The intermediate layer B is formed by two prepreg sheets into two layers.
The layer is a multi-resin layer E. Here, the width of the prepreg sheet constituting the multi-resin layer E is set shorter than that of the prepreg sheet constituting the innermost layer A in order to prevent resin flow from both ends.

Each sheet is wound so that the winding start ends are aligned.
It is wound around again. Before winding, the prepregs constituting the main body layer D (the innermost layer A and the intermediate layer B) are softly overlapped with each other so as to be slidably movable without being pressed against each other. It is wound while crimping.

By winding in this manner, as in the case of winding the members that have been previously pressed together, the pressed portions of each other are forcibly slidably moved to form a wrinkle-like shape, in which air enters, and The problem that the tube 4 is weakened is eliminated, and an ideal close contact state without any gap can be achieved over the entire winding layers. The outermost layer C is formed by narrowing a prepreg sheet having a width of 5 mm along the direction in which the carbon fibers 1 are aligned, by narrowing the tape on both sides into a flat surface, The fibers 1 are spirally wound from above the intermediate layer B so that the drawing direction of the fibers 1 is the circumferential direction S1 of the rod tube 4.

As shown in FIG. 3, the rod tube 4 constructed as described above has a four-layered tubular body, which is not shown, but is formed by molding a polyester tape, a polypropylene tape, a nylon tape, or a composite tape thereof. The tape is wound while being appropriately adjusted in pressure, baked, coated as needed, and a plurality of tapes are connected to form the fishing rod of the present embodiment.

In the rod tube 4, the prepreg constituting the multi-resin layer E has a resin impregnation amount of 50 to 70% by weight, and the intermediate layer B is composed of only the multi-resin layer E.
The resin impregnation amount is 50 to 70% by weight. 50
When it is at least% by weight, it is sufficient for bonding the fibers in the multi-resin layer E and the intermediate layer B, and there is little possibility that bubbles and voids are generated at the time of molding. Since the amount of resin is large, the rod tube 4 is easily bent and has a low elasticity regardless of the presence of the carbon fiber 1 in the axial direction S2. Therefore, when the rod pipes 4 are connected to form a fishing rod, the fishing rod is difficult to break and becomes a delicate fishing rod.

Further, by setting the content to 70% by weight or less,
Even when the rod pipe 4 is greatly bent, the phenomenon that the rod pipe 4 does not return to the original straight state in a state where it is not damaged, that is, the phenomenon that the rod pipe 4 does not return to the original state due to plastic deformation is less likely to occur. Become.

That is, if the rod tube 4 has a layer having a resin ratio of more than 70% by weight, when the fishing rod is bent, the reinforcing fibers 1 (in particular, the fibers aligned in the axial direction S2) are formed inside the rod tube 4. 1) and the matrix resin 2 are relatively displaced and the above phenomenon often occurs, but the fishing rod of this embodiment is
When the intermediate layer B is 70% by weight or less and the outermost layer C and the innermost layer A
Since the content is 0 to 37% by weight, there is no possibility that the resin 2 flows from the outermost layer C and the innermost layer A into the intermediate layer B, and the resin ratio of the intermediate layer B does not exceed 70% by weight. There is little danger of doing so.

The thickness of each prepreg constituting the intermediate layer B (multi-resin layer E) is not less than 0.05 mm and not more than 0.3 m.
m, and the intermediate layer B is configured such that the prepreg is wound into two layers and is thicker than the innermost layer A and the outermost layer C.

Further, the resin impregnation amount per unit volume of the innermost layer A is smaller than that of the intermediate layer B (multi-resin layer E).
The thickness is very thin at 20% by weight or more and 37% by weight or less, and has a value within the range of 0.012mm or more and 0.03mm or less. Even if the innermost layer A is thin,
If it is 0.012 mm or more, the intermediate layer B (multi-resin layer E)
The resin 2 is partially absorbed, and the flow that cannot be completely absorbed is sufficiently received to prevent the resin accumulation in the innermost layer A and the waving of the carbon fiber 1. In addition, when the thickness is 0.03 mm or less, the rod tube 4 makes use of the characteristics of the intermediate layer B (multi-resin layer E) having low elasticity.

The narrow tape is, for example, 3000 pieces.
0.5 tons of carbon fiber 1 per tow
A sheet-shaped prepreg impregnated with 20% to 37% by weight of epoxy resin 2 per unit volume and narrowed to a width of 10 to 10 mm is narrowed to a width of 5 mm along the direction of alignment of the carbon fibers 1. It is made by tearing, the thickness is
It has a value within the range of 0.01 mm or more and 0.05 mm or less.

As described above, the fishing rod of this embodiment has the following advantages because it is configured as described above. That is, in the fishing rod of the present embodiment, the outermost layer C of the rod tube 4 (with a wall thickness of 0.
01-0.05 mm), innermost layer A (thickness 0.012--
0.03 mm), the intermediate layer B having a high resin ratio with the multiple resin layers E is extremely thick (up to about 60 times the outermost layer C, and the total of the outermost layer C and the innermost layer A). (At most about 27 times the thickness), so that the resin impregnation amount of the entire rod tube 4 largely depends on the intermediate layer B,
By making the resin impregnation amount of 50% by weight or more, a low elastic fishing rod can be obtained, and the resin impregnation amount of the outermost layer C of the rod tube 4 is 20 to 37% by weight. The resin 2 is prevented from flowing out from between the outside and the outside (resin flow), and a local decrease in strength of the rod tube 4 is prevented, and a resin flow is prevented, so that a desired resin impregnation rate is maintained. Thus, the fishing rod has low elasticity and is easy to bend.

The resin impregnation amount of the intermediate layer B is 50% by weight.
As described above, the resin impregnation amounts of the outermost layer C and the innermost layer A are 20 to 37.
% By weight, the difference in the resin impregnation amount is large, and the intermediate layer B
This facilitates the flow of the resin 2 into the outermost layer C or the innermost layer A, thereby improving the integrity of each layer, preventing the occurrence of voids, and further improving the strength against tearing. In addition, since the resin 2 flows into the innermost layer A, the modulus of elasticity in the innermost layer A decreases, so that bending of the rod tube 4 and surface cracks on the inner surface side due to crushing are prevented, and after molding, the mandrel is formed. When the core 3 is de-centered, the occurrence of cracks from the surface of the innermost layer A is also prevented.

Further, in the above embodiment, the general-purpose carbon fiber 1 (for example, having an elastic modulus of 24 ton) is used as the reinforcing fiber.
/ Mm ² ), has the advantage that the weight of the fishing rod is lighter than the case where glass fiber is used, and also uses an expensive low elastic carbon fiber (for example, an elastic modulus of 46 ton / m 2).
It is cheaper than the one using m ² ).

Although the fishing rod according to the present embodiment has the above-mentioned advantages due to the above configuration, the fishing rod according to the present invention is not limited to the present embodiment, and the design may be changed as appropriate. It is possible.

For example, in the above embodiment, the epoxy resin 2 is used as the thermosetting resin. However, in the present invention, the thermosetting resin is not limited to the epoxy resin 2 but may be a phenol resin or a polyester resin. Etc. are also within the intended scope of the present invention.

Further, in the above embodiment, the multi-resin layer E is formed by wrapping the prepreg so that the alignment direction of the carbon fibers 1 is in the axial direction S2 of the rod tube 4. The rod pipe 4 of the present invention is not limited to such a configuration, and the present invention is applicable even if the direction of aligning the carbon fibers 1 is made to be angled with respect to the axial direction S2 of the rod pipe 4. Within the intended scope of the invention. In a fishing rod provided with the rod pipe 4 having such a configuration, the cutting yield of the prepreg is poor, and the laminating work at the time of ticket turning is complicated.
Although the workability is poor, it is provided with a tone that is more elastic and more flexible.

In the above embodiment, the carbon fiber 1 as the reinforcing fiber used had a modulus of elasticity of 24 ton / mm ^2. However, the reinforcing fiber of the present invention is not limited to this. General-purpose elastic modulus is 28 ton / mm
² , 30 ton / mm ² , 35 ton / mm ² , 40 to
Carbon fiber of n / mm ² , 45 ton / mm ² or glass fiber may be used.

Further, in the above embodiment, the narrow tape was used as the prepreg constituting the outermost layer C.
Even when a sheet-like prepreg is used, it is within the intended range of the present invention. By adopting such a configuration, a large number of winding operations of the narrow tape can be omitted during molding, and the manufacturing process can be omitted as a whole.
Further, in this case, the sheet-shaped prepreg constituting the outermost layer C may be wound so that the alignment direction of the carbon fibers 1 is oriented in the circumferential direction S1 and is oriented in the axial direction S2. The bill may be turned, or may be turned at an angle with respect to the axial direction S2. Further, the outermost layer C
When a sheet-shaped prepreg is used as the prepreg constituting the prepreg, it is preferable that the prepreg be set to have a width longer than that of the sheet-shaped prepreg constituting the intermediate layer B (particularly, the multi-resin layer E). Thus, the intermediate layer B
By using a prepreg having a width longer than that of the prepreg (especially, the multi-resin layer E), there is an advantage that a resin flow from both ends of the outermost layer C is prevented.

In the above embodiment, the intermediate layer B
Was formed in two layers with two prepregs, but may be formed in one layer with one prepreg, or may be formed in two or more layers by winding one prepreg a plurality of times. The above prepreg may be wound to form three or more layers. In the case where the intermediate layer B is composed of a plurality of layers, not all the layers of the intermediate layer B are formed as the multi-resin layers E as in the above-described embodiment.
Is within the intended scope of the present invention.

Further, in the above embodiment, the rod 4
Has an innermost layer A made of a prepreg having a resin impregnation amount of 20 to 37% by weight. However, even without such an innermost layer A, it is within the intended range of the present invention.

[0041]

As described above, the fishing rod according to the present invention has the following features.
The multi-resin layer makes the fishing rod with a delicate tone, and the resin impregnation amount of the prepreg constituting the outermost layer is 20 to
Since it is 37% by weight, the flow of resin from the outermost layer is also prevented, a local decrease in strength is not caused, and the fishing rod is tenacious against bending.

Therefore, even when the fish are suddenly pulled, the fishing rod is smoothly bent in a well-balanced manner, and the fishing rod is suitable for a fish with a delicate hit and a strong pull. In the case of a fishing rod or a fishing rod, the fishing rod is delicate and hard to break while securing a large outer diameter.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a state in which a prepreg constituting an innermost layer and an intermediate layer is wound in a manufacturing process of the rod tube according to the embodiment. (B) is a perspective view showing a state in which a narrow tape (prepreg constituting the outermost layer) is wound.

FIG. 3 is a cross-sectional view taken in a direction perpendicular to the axis of the rod tube.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Carbon fiber (reinforcement fiber) 2 ... Epoxy resin (thermosetting resin) 4 ... Rod pipe A ... Innermost layer, B ... Middle layer, C ... Outermost layer, D: body layer, E: multiple resin layers S1: circumferential direction

Claims (7)

[Claims] 1. A fishing rod comprising a rod tube (4) formed by winding a prepreg in which a thermosetting resin (2) is impregnated into a reinforcing fiber (1) and formed in a laminated shape, wherein the rod tube ( 4) comprises an outermost layer (C) and a main body layer (D) other than the outermost layer (C), and the main body layer (D)
Comprises a multi-resin layer (E) composed of a prepreg having a resin impregnation amount of 50 to 70% by weight, and the resin impregnation amount of the prepreg constituting the outermost layer (C) is 20 to 3%.
A fishing rod characterized by being 7% by weight. 2. The fishing rod according to claim 1, wherein the multi-resin layer (E) is adjacent to the outermost layer (C). 3. The fishing rod according to claim 1, wherein the main body layer (D) comprises an innermost layer (A) located on the innermost side and an intermediate layer (B) excluding the innermost layer (A). 4. The fishing rod according to claim 3, wherein the resin impregnation amount of the prepreg constituting the innermost layer (A) is 20 to 37% by weight. 5. The fishing rod according to claim 3, wherein the innermost layer (A) has reinforcing fibers (1) aligned in the circumferential direction (S1). 6. The fishing rod according to claim 3, wherein the resin impregnation amount of the prepreg constituting the intermediate layer (B) is 50 to 70% by weight on average. 7. The fishing rod according to claim 6, wherein the thickness of the intermediate layer (B) is at least twice the total thickness of the outermost layer (C) and the innermost layer (A).