JPH0984495A - Inwardly threaded fishing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inwardly threaded fishing rod large in the inner diameter, having a delicate touch, capable of being highly bent, and having a tough tip rod. SOLUTION: The tough tip rod 10 of this inwardly threaded fishing rod is manufactured so as to be provided with a layer 10T and layers 10S and 10U. The layer 10T is formed by winding a prepreg containing a synthetic resin in an impregnation rate of >=50wt.% and having reinforcing fibers arranged in a direction so that the unidirectionally arranged reinforcing fibers are directed in the approximately axial direction. The layers 10M and 10U have braidings densely wound in a net bag-like shape wherein many fibers are crossingly arranged from both the lateral sides approximately symmetrically with respect to the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow fishing rod having a tip rod capable of large deflection.

[0002]

2. Description of the Related Art A hollow fishing rod having a fishing line inserted therein is used for the purpose of preventing entanglement of the line. It is necessary to secure a space for inserting the fishing line inside and to reduce the resistance of the fishing line even for a fishing rod with a thin diameter such as a tip fishing rod, so that the outside diameter of the fishing rod is generally larger than that of a fishing rod that is not threaded through. It

[0003]

However, the larger the rod tube outer diameter, the higher the flexural rigidity, and the fishing rod having a delicate tone cannot be provided. In order to obtain this delicacy, if a synthetic resin material with a low elastic modulus is mainly formed or the wall thickness of the rod tube is thinned, the strength becomes insufficient,
It is easily damaged during large deflection.

Therefore, an object of the present invention is to provide a medium-through fishing rod which has a delicate tone while having a large inner diameter and has a sticky tip rod capable of large deflection.

[0005]

In view of the above object, the present invention provides a prepreg having a unidirectionally oriented reinforcing fiber with a synthetic resin impregnation ratio of 50 wt% (weight percent) or more. A layer formed by winding the fibers so that they are oriented substantially in the axial direction, and a large number of fibers from both the left and right sides that are substantially symmetrical with respect to the axial direction are oriented in a cross shape and wound tightly in a bag net shape. There is provided a hollow fishing rod having an ear rod provided with a layer having braiding. A synthetic resin impregnated with 50% by weight or more of a prepreg having unidirectionally oriented reinforcing fibers is molded together while penetrating the braiding layer. Not only the impregnated synthetic resin ratio of the prepreg having the reinforced fibers oriented in one direction, but the ratio of the synthetic resin of the entire molded rod layer is 50%.
It is preferably at least wt%. Therefore, the synthetic resin may be replenished by coating or the like from above the braided layer, and then heat-molded.

Since the amount of synthetic resin is as large as 50 wt% or more, despite the existence of the reinforcing fibers in the axial direction, the tip rod can be set to have a low flexural rigidity and a delicate tone can be obtained. Also, when the deflection becomes large, the rod will not be crushed or buckled and will not become a tip rod. In general, in order to prevent this, a rod tube is constructed by disposing circumferential reinforcing fibers inside and outside the layer of axial reinforcing fibers. However, when largely deflected, peeling is likely to occur between adjacent circumferential reinforcing fibers of such a tip rod,
If peeled off, it is difficult to exert the effect of the circumferential reinforcing fibers.

Therefore, in the present invention, a layer of so-called braiding, which is densely wound, is arranged in addition to the layer having the axial reinforcing fiber, and the presence of the axial component of the reinforcing fiber of the braiding layer In addition to preventing this peeling, the resin melted at the time of heat molding enters into the eyes of the blading and is molded, so that delamination with the layer having axial reinforcing fibers is prevented, and the axial reinforcing It is possible to provide a hollow fishing rod that has fibers and reinforcing fibers of a braiding layer that are reinforced together so as to be connected to each other, prevent crushing and buckling of the rod tube, and have a tenacious tip rod that is difficult to break. Here, dense is
This means that the distance between the fibers is at least about several times the diameter of the fibers or less, but it is preferable that the fibers are adjacent to each other so as to be in contact with each other.

[0008] Further, although the sharply deformed tip rod is not apparently damaged, it may not return to its original straight state. It is considered that this is because the axially long direction reinforcing fibers and the matrix resin thereof are relatively displaced from each other, and this phenomenon is caused by a load acting on the tip rod and twisting, and Is displaced from the exact axial direction of the tip rod, or is displaced during molding, and tends to occur when the synthetic resin ratio is high. Even if it is oriented exactly in the axial direction at the time of molding, if the tip rod is twisted, the direction of the axial longitudinal reinforcing fiber will deviate from the exact axial direction, but there will be a braiding layer. For example, the diagonally oriented fibers have a strong resistance to twisting, and the amount of twisting is actually small. Therefore, the axial lengthwise reinforcing fibers are also less likely to be displaced from the axial length direction, and even if the resin ratio is high, the fibers are not likely to be displaced from each other. Therefore, the internal displacement state is unlikely to occur, is easily returned to the original state, and becomes tenacious with respect to large deflection.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in more detail based on the embodiments shown in the accompanying drawings. FIG. 1 is a vertical cross-sectional view of a tip rod 10 of a hollow fishing rod. FIG. 2 is a partially enlarged view of the rod tube. A top guide 12 is attached to the tip of the tip rod 10, and it is preferable that the top rod 12 be detachable by screwing. A ceramic guide ring 12G is provided at the tip of the top guide, another guide ring 12G 'is provided at the tip of the tip rod 10, and a butt plug 16 having a guide ring 16G attached thereto is screwed at the rear end. (Screws are not shown). A spiral fishing line guide 14 is provided inside. Thus fishing line (not shown)
Can be inserted inside the tip rod while reducing resistance.

The tip rod 10 has an inner layer 10 as shown in FIG.
It has a U layer, a middle layer 10T, and an outer layer 10S. Middle layer 10T
Is a layer having reinforced fibers in the axial direction and formed by a prepreg with a synthetic resin content of 50 wt% or more. The axially reinforced fibers have a low elastic modulus. For example, glass fiber, low elasticity carbon fiber (30,000 kg
/ Mm ² or less) or the like. In this middle layer, not only the reinforcing fibers oriented in the axial direction but also the circumferential fibers and the like may be mixed. Due to the presence of the fibers in the axial direction, a bending rigidity when the tip rod is bent and a rebounding action when the tip rod is bent, that is, a rod tone is obtained.

In order to allow the fishing line to pass through the inside of the tip rod with a small resistance, it is necessary to ensure a large inner diameter, but if this is done, the outer diameter of the tip rod also becomes large, and in general, the above bending stiffness and flexure are required. The bounce-back effect when hitting becomes too strong. This cannot provide a delicately tuned tip rod. Therefore, in order to adjust and reduce the bending rigidity, low-elasticity carbon fiber or glass fiber is used as the reinforcing fiber, and the ratio of the synthetic resin of the matrix is increased to reduce the bending rigidity of the tip rod 10.

Although the bending rigidity of the tip rod is adjusted in this way, the tip rod 10 is likely to be crushed or buckled when it is largely bent. In order to prevent such breakage due to bending, generally reinforcing fibers in the circumferential direction are arranged in the inner layer and the outer layer of the middle layer 10T, but in the case of a rod tube that undergoes large bending like a delicately tuned tip rod, reinforcement in the circumferential direction is performed. The matrix resin between the fibers is damaged and adjacent circumferential reinforcing fibers are separated,
It is easy to cause crushing and buckling. Also, the middle layer 10
Interlayer slip easily occurs between T and the inner and outer layers 10U and 10S, which may cause damage.

In order to prevent damage due to such large deflection, in the present invention, a braiding layer tightly knitted in a bag-like mesh is provided in place of the circumferential reinforcing fiber layers of the inner and outer layers. Unlike the circumferential fibers, the bag-like fibers that are formed have a component in the axial direction, so that separation between fibers due to large deflection is prevented, and torsion resistance is large, and axially reinforced fibers Is unlikely to deviate from the resin. Also, the middle layer 10
The synthetic resin of the molding prepreg of T enters into the mesh of this braiding at the time of thermoforming, and delamination is prevented.
For this reason, it is possible to provide a tip rod that is tough even under large deflection and is not easily damaged.

As described above, the tip rod of the present invention has a delicate tone and is tenacious against large deflections while allowing the fishing line to be inserted with a small resistance, that is, it is hard to break and is plastic when bent. It is prevented from deforming and not returning to the original state. The reinforcing fibers used for the braiding are glass fibers, the above-mentioned low elastic carbon fibers, polyetherimide (PEI),
An aramid fiber or the like. Reinforcing fibers having relatively low elasticity are used because braiding reinforcing fibers have a component in the axial direction of the rod, so that the bending rigidity is added to the bending rigidity of the middle layer 10T of the axial reinforcing fibers. This is to reduce the number.

As described above, circumferential reinforcing fibers may be mixed inside the middle layer 10T, and the middle layer 10T and the inner layer 1 may be mixed.
Circumferential reinforcing fibers may be arranged between 0 U layers or further inside the inner layer 10 U. In this case, the elastic modulus of the circumferential reinforcing fiber may be larger than that of the axial longitudinal reinforcing fiber.
In this way, a lightweight and high-strength tip rod can be formed. Further, since the reinforcing fibers are obliquely oriented in the braiding layer, they are resistant to twisting and durable even when the tip rod is bent in any direction. Further, a rubber elastic layer may be formed on the outer side or the inner side of the braiding layer to enhance the restoring force of the tip rod. In addition, if fibers having a greater breaking elongation than the inside of the tip rod 10 are used as compared with the inside thereof, it is easier to endure such a large amount of bending.

Since each fiber of the braiding is directed obliquely, there are fewer circumferential components than when the fibers are directed circumferentially, and most of the fibers in the circumferential direction are arranged on the tip rod 10. If not, when the tip rod is bent, the cross-sectional shape is likely to change from a perfect circle shape to an elliptical shape, large bending is possible, and the existence of a braiding layer and the high proportion of synthetic resin make it possible. Hard to be crushed or cracked.

FIG. 3 is a view of the tip rod 10 shown in FIGS. 1 and 2 in the process of being formed. The cored bar 20 has a large number (for example, 6 pieces) from both sides of the longitudinal axis L1 of the cored bar 20. Above 1
(Two or less) fibers S1 and the same number of fibers S2 are oriented in a cross shape at substantially symmetrical angles θ and θ ′ and braided to form a bag-mesh layer 1
It forms 0U '. The angles θ and θ ′ are 30 to 80
The degree is preferably about 45 degrees, more preferably 45 to 80 degrees. Especially around 45 degrees, it is strong against torsion. These reinforcing fibers S1 and S2 have an elastic modulus of 24000 kg / m here.
It is m ² of carbon fiber.

The synthetic resin (epoxy resin) ratio for forming the intermediate layer 10T from above is 50 wt% or more (here, 69 wt%), and the elastic modulus is approximately 7200 kg / m.
A prepreg 10T ′ of a woven fabric of m ² glass fibers (having the same amount of orthogonal bidirectional fibers) is wound so that the fibers are oriented in the direction of the approximate axis L1. Further thereon, a bag-mesh-like layer similar to the bag-mesh-like layer 10U 'is formed. This is heat-treated to form the tip rod 10. In this case, the synthetic resin in the middle layer penetrates into the inside and outside of the bag-mesh braid, and the resin spreads to all layers. Braiding layer 10 on the inside of layer 10T having longitudinal fibers
It is preferable that U is present, and the braiding layer is provided inside the layer 10T in the case of only the inner layer 10U and in the case of the outer layer 1.
It may be only 0S.

In the bag net-like layer, the fibers S1 and S2 are continuous and are not cut in the middle of the circumferential direction. Therefore, this true braiding layer has high strength, but instead of this braiding layer, the winding direction of the woven fabric is set so that the angle of each direction fiber of the woven fabric intersects is θ or θ ′. The layer wound around the core may be replaced with the inner layer 10U 'or the outer layer. Alternatively, the fibers may be wound in a spiral in one direction and then this or another fiber may be wound in a spiral in the opposite direction so as to have a shape close to a bag-like mesh. The thickness ratio of each of the outer layer 10S, the middle layer 10T, and the inner layer 10U of the molded tip rod 10 is preferably about 1: 1: 1, and the middle layer 10T is preferably large.

Furthermore, in order to withstand a large deflection,
It is preferable to use a material capable of large expansion and contraction such as rubber or elastomer resin as the synthetic resin of the intermediate layer 10T.
Further, if a so-called triaxial woven fabric that is oriented in three directions on a plane is used for the prepreg of the middle layer 10T, the number of fibers oriented in the axial direction is reduced, the flexural rigidity becomes smaller, and other Crushing can be prevented by the action of fibers in two directions. It is effective to increase the wall thickness of the rod tube in order to improve the strength against crush fracture, but mixing particles can increase the wall thickness and prevent the flexural rigidity from increasing. Further, if these particles are made to have a light specific gravity, it contributes to the weight saving of the tip rod. That is, by mixing a foam material, a hollow material, or an organic material or a natural material that has a lower specific gravity and is smaller than the matrix synthetic resin (about 1 micron or less) and thickens,
Reduce weight.

In order to further soften the tip of the tip rod 10, as shown in FIG. 4, as a prepreg corresponding to the middle layer 10T, above or below the prepreg P1 similar to the above prepreg 10T ', the rod tube Prepreg P2, which is a low-resin ratio, high-elasticity aligned fiber that is usually used for manufacturing,
As shown in (a), layers cut in a triangular shape are stacked to form layer 1
It may be wound on 0U '. By doing so, the prepreg P2, which is a highly rigid rod tube, is as small as the tip of the rod and is large at the rear, so that the tip rod has a soft-tipped tip.

Further, instead of the prepreg P2 of (a),
As shown in (b), each has a low resin ratio and is formed into a trapezoidal prepreg, and prepregs P21, P22, and P23 of aligned fibers using reinforcing fibers having a higher elastic modulus toward the rear are sequentially superposed to have a high resin ratio. There is a low elastic modulus prepreg P
It may be wound on top of 1. The inner layer 10U and the outer layer 10S are
The front part is made denser to reduce the amount of fibers in the axial direction (middle layer),
When the amount of fibers in the axial direction is increased by roughening toward the rear, a softer tone is obtained.

In FIG. 5, the layer structure of the present invention is applied to the front rod tube 10F of the tip rod 10 ', and the rear rod tube 10R is a rod tube having a general layer structure. That is, in the present invention, the layered structure described above may be employed for a part of the tip rod. The front rod tube 10F is attached to the outer periphery of the rear rod tube 10R,
A length region 12 having an inner diameter larger than the inner diameter of the rear rod tube 10R
Exists, and this length is approximately 1/1 / the free length l1 of the tip rod pipe.
When it is set to 3 or more, preferably 1/2 or more, the fishing line can be fed out while preventing an increase in the line resistance even if the tip rod tube is largely bent.

As shown in FIG. 5, the tip rod is divided into two,
When further dividing into three or more pieces, if the lengths are sequentially set to l1, l2, l3 ... From the front part, then l1 <l2 <l
When it is set to 3 <..., it is easy to produce a rod tone with a soft tip like a tip rod with a guide on the outside, not through the center. Further, the weight or rigidity of each divided portion is not necessarily heavier or higher toward the rear, and for example, the weight or rigidity is indicated by an attached symbol of w, and l1w> l2w <l3w
.. etc., the second portion 12 from the front becomes a light or soft portion, and has a tone different from that of the soft front tone, but a desired tone can be obtained by setting these to your liking.

FIG. 6 shows a rod tube portion 10B in which the tip portion of the tip rod is formed only by blading, and the rear portion of the rod tube has a layer of braid layers in addition to a layer of axial reinforcing fibers. It may be the rod section of the invention structure, or it may be a normal rod section that is not. The blading of the tip part may be a layer wound multiple times, and by comparing the inner layer side and the outer layer side, the orientation angle of the braiding fiber is changed, the elastic modulus is changed, and the coarse / dense state is changed. hand,
Larger flexures can be accommodated by having the outer layer have a higher elongation. Reference numeral 14 'is a guide ring, but may be a spiral guide.

The rod tube portion 10B is a braided layer having rough openings in which a wire having a large diameter such as a metal fiber is knitted in a cross shape and an opening communicating with the inside is formed. It can also be a tip part.

[0027]

As is clear from the above description, according to the present invention, the layer having axial reinforcing fibers has a high resin ratio, so that the rigidity against bending can be set low and the layer becomes flexible. For crushing and buckling damage during large deflection, the presence of braiding prevents delamination due to resin entering the mesh, and the presence of a component in the axial direction of the fiber causes the fiber The peeling is prevented. In addition, it is possible to provide a medium-through fishing rod having a tenacious tip rod capable of large deflection, which has a delicate tone while having a large inner diameter while being unlikely to be displaced from the axial length direction reinforcing fiber and the resin.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a tip rod of a hollow fishing rod according to the present invention.

FIG. 2 is a partially enlarged vertical cross-sectional view of the tip rod of FIG.

FIG. 3 is a manufacturing process drawing of the tip rod rod of FIG. 1.

FIG. 4 is another form view of the prepreg used for manufacturing the axially-longitudinal layer of the tip rod rod of FIG. 1.

FIG. 5 is a cross-sectional view showing another form example of the tip rod.

FIG. 6 is a side view showing another form example of the tip rod.

[Explanation of symbols]

10 Tip Rod 10T Axial Longitudinal Layer 10T 'Axial Longitudinal Layer Prepreg 10S, 10U Inner / Outer Layer with Braiding 10U' Braiding Before Firing P1 Prepreg with High Reinforcement Fibers with High Synthetic Resin Ratio P2 Synthetic Resin Ratio Prepregs with low high modulus reinforcing fibers S1, S2 braided braided cross reinforcing fibers

Claims (1)

[Claims] 1. A prepreg having a unidirectionally oriented reinforcing fiber having a synthetic resin impregnation ratio of 50 wt% or more,
A layer formed by winding the unidirectional reinforcing fibers so as to be oriented substantially in the axial direction, and a large number of fibers from left and right sides which are substantially symmetrical with respect to the axial direction and are oriented in a cross shape in a bag-like shape and densely. A hollow fishing rod, which has a tip rod provided with a layer having braiding wound around the rod.