JP2003116419A - Internally threaded fishing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-strength internally threaded fishing rod preventing the mechanical strength drop close to a guide body integratedly and projectedly formed inside the rod pipe. SOLUTION: This internally threaded fishing rod is such that the spiral guide body 30 is integratedly formed so as to be projected inside the rod pipe 12 made of a synthetic resin as the matrix reinforced with reinforcing fibers, wherein from the end portion 30E of the guide body 30 in the axial direction of the rod pipe 12 along the direction to the end portion of the rod pipe 12, there is provided an area where a reinforcing layer 50 having a thickness nearly equal to the height of the guide body at its end portion is integrated with the internal surface of the rod pipe in the vicinity of the end portion of the guide body 30.

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 provided with an annular fishing line guide or a spiral fishing line guide inside a rod tube.

[0002]

2. Description of the Related Art From the viewpoint of improving the slipperiness of a fishing line and the like, in JP-A-4-341133, a single fiber fishing line guide annular body (fishing line guiding body) is integrally formed on the inner peripheral surface of a rod tube. A hollow fishing rod is disclosed. In addition, JP-A-5-882
In Japanese Patent Publication No. 59, a prepreg forming a rod tube is wound on a resin tape spirally wound around a core metal, and a spiral protrusion (fishing line guide body) is simultaneously integrated using this prepreg. A tubular body such as a formed rod tube is disclosed.

[0003]

However, in the case of integrally forming the guide body on the inner surface of the rod tube, the prepreg is wound on the outer side of the core metal and heated while being pressed by the tightening tape, but in the former publication. Due to the presence of the guide body, the axial lengthwise fibers of the rod tube meander, and the resin flow of the prepreg becomes uneven.In the latter publication, the presence of the resin tape causes the axial lengthwise fibers of the rod tube to meander and the prepreg. The resin flow becomes uneven. In this way, the strength of the rod tube is reduced and it becomes easy to damage it. In addition, the guide body integrally formed on the inner surface of the rod tube has a great influence on the rod tube strength when the rod tube is bent, and the bending strength of the rod tube due to stress concentration depending on the shape, structure, material, etc. of the guide body. And the rod pipe may be broken and broken during fishing. That is, in the conventional rod tube, it is considered that the detailed consideration in the guide body and the vicinity of the guide body is insufficient.

Therefore, an object of the present invention is to provide a high-strength medium-through fishing rod which prevents the strength of the rod tube near the guide body from being lowered, which has a guide body integrally formed on the inside of the rod tube.

[0005]

In view of the above object, in the present invention, in claim 1, a spiral guide body is integrally formed so as to project to the inside of a rod tube reinforced by reinforcing fibers with a synthetic resin as a matrix. In the middle fishing rod, the guide height of the guide body is substantially the same as the guide height of the guide body along the end direction of the rod body from the end in the axial direction of the rod body. (EN) Provided is a hollow fishing rod having a region in which a reinforcing layer having a certain thickness is integrated with an inner surface of a rod pipe.

If the spiral-shaped guide ends at an intermediate position of the rod tube, when the bending occurs, the rod tube is formed in the boundary area between the rod tube area without the guide and the rod tube area where the guide is arranged. Is easily damaged. Further, according to the method of integrally forming the protruding guide, since the prepreg of the rod tube main body is wound from above the guide, the main body prepreg meanders at the stepped portion at the end position of the guide, and the resin flow is uneven. Results in reduced strength. In particular, the meandering of fibers in the axial direction greatly affects the strength of the rod tube. Therefore, in addition to reinforcing this boundary area, in order to prevent the rod tube main body prepreg from meandering during the integral formation, along the guide tube end direction from the end portion of the guide body to the guide height and near the guide height. About the same degree (8
A reinforcing layer having a thickness of about 5 to 105%) is integrated with the inner surface of the rod tube. The reinforcing layer includes a member having a high rigidity as well as a flexible member serving as a buffer portion.

The middle fishing rod according to claim 2, wherein the terminal end portion of the guide body is densely arranged over a predetermined length in the axial direction of the inner circumference of the rod tube to form the reinforcing layer. provide. Since the end portion of the spiral guide is densely arranged on the inner circumference of the rod tube to form a reinforcement layer, even if stress concentrates on the rod tube near the end of the guide body during bending, the strength of the rod tube in this part improves. As a result, damage is prevented. The end of the rod tube is generally configured to have higher strength than other parts for joining, but if the end part of the spiral guide body is close to this joining part, dense distribution of the guide body By the installation, the joint can be reinforced at the same time, and furthermore, the fishing line can be prevented from being caught on the end of the spiral guide body. Further, even if the end portion of the spiral guide body is located far away from the end portion of the rod tube, if the guide body is arranged so that the wall thickness is gradually reduced in the dense arrangement, the dense arrangement of the rod is prevented. Even if the structure is terminated in the middle of the pipe, the rod pipe strength is improved against stress concentration.

In another mode 1, a guide rod is integrally formed so as to project inside a rod tube reinforced by reinforcing fibers using a synthetic resin as a matrix, and the guide body is made of synthetic resin. A matrix is used, and the ratio of the reinforcing material is increased in the protrusion region of the guide body where the fishing line comes into contact, and the front and rear of the protrusion region, the main body layer mainly composed of fibers in the axial direction of the rod tube, and the protrusion region. Provided is a hollow fishing rod in which a synthetic resin region, or a mixed region with a reinforcing material having a high synthetic resin ratio is disposed between. In the guide body formed by FRP or the like, if the protrusion area is made of a large amount of reinforcing material, and if the synthetic resin ratio is increased between the protrusion area and the rod tube body layer and before and after the protrusion area, the bending rigidity of the guide body is increased. Since it can be connected to the rod tube in a region of low rigidity compared to the high protrusion region, the resistance due to the bending rigidity of the protrusion region when the rod pipe bends can be mitigated, and stress concentration in the rod pipe occurs. Can be prevented, and the rod tube strength is improved.

[0009] In another mode 2, the fishing rod is a hollow fishing rod integrally formed with a guide body so as to project to the inside of a rod tube reinforced by reinforcing fibers with a synthetic resin as a matrix. Provided is a hollow fishing rod having an outer peripheral surface substantially along the inner surfaces of the front and rear rod tubes of the body. If the outer peripheral surface of the guide body is substantially along the inner surfaces of the front and rear rod tubes, the fibers in the axial direction of the rod tube near the guide body are less likely to meander, and the rod tube strength is improved accordingly.

In another mode 3, a guide rod is integrally formed so as to protrude inside a rod tube reinforced by reinforcing fibers with a synthetic resin as a matrix, and the guide body is made of synthetic resin. (EN) Provided is a hollow fishing rod characterized in that it is formed and arranged in a large number of places at short intervals in the axial direction. If the guide body itself is made of synthetic resin, one guide body is weak in frictional resistance with the fishing line and is easily worn, but the contact area of the fishing line is not always constant, and a small diameter area close to the tip of the contact resistance is small. The wear can be prevented by arranging multiple places at short intervals, etc., and since it is a synthetic resin guide body, it does not show great resistance to bending of the rod tube, stress concentration can be prevented, and the rod tube strength is improved. To do.

In another mode 4, a hollow fishing rod integrally formed with a guide body so as to project to the inside of a rod tube reinforced by reinforcing fibers with a synthetic resin as a matrix, which is connected to the inner surface of the rod tube. Provided is a hollow fishing rod characterized in that the curved surface of the bottom portion of the guide body is formed into a concave curved surface that is gentler than the convex curved surface extending from the top to the side surface of the guide body. By devising the shape of the guide body and forming the shape of the bottom part connected to the inner surface of the rod tube to be a concave curved surface that is gentler than the convex curved surface near the protrusion, the thickness of the guide body will be reduced gradually The stress concentration of is reduced, and the strength of the rod tube is improved.

[0012] In another aspect 5, a hollow fishing rod in which a guide body is integrally formed so as to project inside a rod tube reinforced by reinforcing fibers with a synthetic resin as a matrix, the main body of the rod tube and the guide. Provided is a hollow fishing rod characterized by having a region in which a reinforcing member having a width wider than that of the guide body is arranged between the body and the body. Since a reinforcing member having a width wider than the width of the guide body is arranged between the body of the rod tube and the guide body, stress concentration on the rod tube around the guide body due to the integration of the guide body is prevented. The rod tube is reinforced to improve the bending strength. This reinforcing member is mainly a sheet material such as a carbon tape, a glass scrim sheet, a synthetic resin film, a thread-like synthetic resin, or a natural material such as cotton thread or paper.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in more detail based on the embodiments shown in the accompanying drawings. FIG. 1 shows an example of a form of a middle fishing rod. High strength fiber such as carbon is impregnated with thermosetting resin such as epoxy resin, or fiber reinforced prepreg (used in a broad sense including thermoplastic resin) mixed with thermoplastic resin such as polyamide is wound and fired. The base rod 10 and the tip rod 12 of the formed rod tube are joined in a side-by-side manner. The base rod 10 has a reel mounting portion 16 on which a dual-bearing type reel 26 is mounted, and a fishing line 28 is inserted into the rod pipe through a fishing line introducing portion 24 at the front part of the base rod 10, and the tip rod It goes out from the top guide 14 at the tip of 12. The front grip 20 is provided on the front side of the reel mounting portion of the original rod 10.
A, a rear grip 20B is provided on the rear side, and a rod end component 22 is screwed on the rear end. 18 is a trigger.

FIG. 2 shows a longitudinal sectional view of the rear part of the tip rod 12, and FIG. 3 shows an enlarged view of the portion C thereof. A plug 12E made of metal or synthetic resin is screwed to the rear end of the tip rod 12,
A ceramic guide ring G1 is fixed to the inner periphery thereof. On the other hand, a spiral guide body 30 is integrated with the rod tube 12 on the inner peripheral surface of the rod tube on the front side of the plug body 12E. The spiral guide body is an example, and independent annular guide bodies may be arranged at predetermined intervals, and the spiral guide body may be right-handed or left-handed, or a combination of both. Furthermore, the installation area of the guide body is the rod tube 1.
It may be the whole of 2 or a part thereof.

The rod tube 12 has reinforcing layers 12A and 12B on the outer peripheral side and the inner peripheral side of which fibers are oriented in a substantially circumferential direction,
In between, there is a thick body layer 12H with the fibers oriented generally axially. The guide body 30 uses a synthetic resin as a matrix, and is provided with reinforcing materials HB such as carbon fibers, ceramic fibers, glass fibers, and metal fibers mainly oriented in the longitudinal direction of the guide body. As shown, the outer circumference 30H is linearly formed. The reinforcing material HB is mainly disposed in the projecting portion area where the fishing line comes into contact, is hardly disposed on the outer peripheral side, and the outer peripheral side and the front and rear portions are mainly made of synthetic resin. It is a layer JS.

The amount of resin in the region where the reinforcing material is provided is 30 to 60% by weight, which is set higher than the resin content of the rod tube to facilitate the formation of the synthetic resin layer JS and to guide the guide member 30. Of voids on the inner surface of the.
Moreover, a buffer portion 32 made of synthetic resin for connecting the guide body 30 and the inner surface of the rod tube 12 is formed in the front and rear of the guide body 30 so that the thickness thereof gradually decreases as the distance from the guide body increases. The outer periphery of the guide body 30 is the reinforcing layer 12
It is integrated with the rod tube so that it is somewhat buried in B.
Therefore, the region 12b of the reinforcing layer 12B facing the outer periphery 30H of the guide body is formed thinner than the other regions.

The reinforcing layer 12b, the reinforcing layer 12B around the guide body, and the synthetic resin layer JS generally have a bending elastic modulus (a rod with respect to bending in the bending direction of the rod tube) more than that of the protruding portion region where the reinforcing material HB is arranged. The resistance force (rigidity) per unit area in the cross section with respect to the pipe is small, and the cushioning function is provided together with the cushioning portion 32 to prevent stress concentration from occurring when the rod pipe is bent. If the synthetic resin layer JS and the synthetic resin of the buffer portion 32 are made of the same type of resin as the synthetic resin of the rod tube 12 (epoxy resin if the rod tube is an epoxy resin), the integrated strength is improved. Furthermore, if the resin used for the guide body 30 is a resin that does not melt at the heat molding temperature of the rod tube, for example, a thermoplastic resin, the outer periphery 30H of the guide body 30 is formed in a linear shape as described above. Therefore, when integrated with the prepreg for forming the rod tube, it is possible to prevent the reinforcing fibers SL oriented in the axial direction, which is the main body of the main body layer 12H, from meandering, and the rod tube strength is improved. In this way, the rod tube of the present embodiment has a buffering action area (32, etc.), and the strength at the time of bending is about 15 to 20% as compared with the case where the outer periphery of the guide body is not a straight line but a curved surface protruding outward. Improved.

FIG. 4 shows another embodiment corresponding to FIG. 3, in which the projecting portion area A1 of the guide body 30 with which the fishing line comes into contact.
(Only the left half is shown, but the symmetrical right side is also included) and the reinforcing materials HB as described above are distributed substantially evenly therein, and the outer shape of the portion is substantially elliptical. Guide body 3
Areas A2 and A3 before and after the remaining portion of 0 and the inside thereof are the buffer portion 32 formed of synthetic resin in this embodiment. Areas A1 to A2 are convex inside the rod tube to ensure a certain width of contact with the fishing line (most contact areas are areas A
1), the region A3 is concave inward so that the thickness of the guide body 30 is gradually reduced. Preferably areas A1 to A
As the concave curved surface that is gentler than the average curvature over two, the width L of the guide body is increased, and the protruding portion area A1 (including left and right)
It is preferable to make it about twice or more. Also guide body 3
A resin layer 33 serving as a buffer layer is formed on the outer side of 0 between the main body layer 12H and the reinforcing layer 12B. Therefore, it is possible to prevent the stress concentration when it is bent.

One of the methods for integrally molding the guide body 30 is that a plurality of reinforcing material fibers are bundled and impregnated with a thermosetting resin and twisted. The buffer portion 32 is formed by melting and bleeding forward and backward.

In FIG. 5, the outer circumference 30H of the guide body 30 formed of a material whose components do not melt during heating, that is, a ceramic material, a metal material, a heat-resistant synthetic resin material, a composite material, or the like is inside the rod tube 12. Inner peripheral surface 12 of the reinforcing layer 12B
A linear shape that is substantially along S, and a buffer portion 32 that is connected to the rod tube and has a buffer function is provided before and after the guide body 30. The buffer portion is formed of synthetic resin or a mixture of synthetic resin and reinforcing material in a small proportion. In this way, stress concentration when the rod tube is bent is prevented. Further, since the outer periphery of the guide body is linear, the fibers in the axial direction of the main body layer 12H can be prevented from meandering, and the rod tube strength is improved.

In the case of the guide body 30 made of the above heat-resistant synthetic resin material, a large number of places are arranged at short intervals in the axial direction of the rod tube so that the guide body 30 may be partially abraded due to friction with the fishing line. It needs to be prevented. Further, as in the other embodiment, the reinforcing layers 12A and 12B may be omitted, but in this case, in the main body layer 12H, a thin layer in which the fiber direction is oriented substantially in the circumferential direction or the circumference of the fiber is usually formed. A cloth having a directional component (including a scrim sheet) may be mixed.

In FIG. 6, the guide body 30 is made of a resin such as a thermosetting resin that melts at the molding temperature of the rod tube 12 made of the main body layer 12H, in order to prevent meandering of fibers in the axial direction of the rod tube. The outer peripheral surface 30H is preferably formed in a linear shape. As described above, since the resin guide body 30 is easily worn, a large number of locations are arranged at short intervals (a spiral interval is narrowed). Further, since greater flexibility must be ensured in a region closer to the rod tip, it is preferable to apply a synthetic resin guide body having low bending rigidity to such a region near the rod tip. This area is a rod tube with a design structure that bends and escapes when a large load is applied from the fishing line, so it is not strongly rubbed by the fishing line near the fishing line introduction part of the fishing rod, and it is possible to smoothly guide the fishing line even with a synthetic resin guide body. . Thus the rod tube 12
The resin guide body 30 integrally formed with the rod does not have a large resistance when the rod tube is bent, and stress concentration is prevented. The wear resistant particles may be mixed to such an extent that the flexural rigidity is not significantly affected. In the manufacture of the guide body 30, the synthetic resin used for the prepreg for the rod tube 12 may be used to form the guide body 30.

FIG. 7 shows an example of the essential parts of a hollow fishing rod according to the present invention. A spiral guide body 30 formed by bundling carbon fibers or the like is integrally projectingly arranged on the rod tube 10 ′, and the end portion thereof is left as it is or the fibers are separated so that a predetermined length range of the front end portion of the rod tube is obtained. The front end is reinforced by tightly winding it (in the range used for seaming, etc.). The wound inner surface may be formed in a forward thin shape in the case of the squeezing type, and in a straight shape in the case of parallel splicing. In this way, the end of the rod tube that originally needs to be reinforced, especially the joint portion, can be reinforced by using the spiral guide body, and a rod tube having high strength can be provided. Further, depending on how the end portion of the spiral guide body 30 is treated, the fishing line may be caught, which may increase the resistance of the fishing line or damage the guide body 30 from its end portion. It can be prevented from being caught and the durability of the guide body can be improved.

Unlike this figure, if the spiral guide body 30 terminates at a position further rearward of the rod tube 10 ', the fibers of the guide body are separated from this end position to the tip of the rod tube. Even if the structure is such that dense winding is performed up to an intermediate position that does not reach, and the thickness is gradually reduced at least near the end of the dense winding, stress concentration near the end position of the spiral guide body 30 Can be reinforced and prevent damage.
Further, a structure similar to these may be adopted not only on the front side of the rod tube but also on the rear side thereof. As a matter of course, such reinforcement may be achieved by using another member such as another prepreg sheet or tape, or a combination of both.

FIG. 8 is a diagram for explaining one method of manufacturing a hollow fishing rod. On the surface of the cored bar 40, a tape 4 having a predetermined thickness
2 is wound while being separated for a predetermined time, and a thin film 44 such as polyethylene naphthalate (PEN) or polyethylene terephthalate (PET) that withstands a heating temperature is covered therewith, and a spiral guide body G2 is wound in the gap between the tapes. To do.
At this time, if the thickness of the tape 42 is set to about the height of the guide body G2, the prepreg P for the rod pipe wound from above is provided.
The lower surface of 1 and the outer periphery of the guide body G2 can be substantially in contact with each other.

When heating is performed while pressurizing in this way, the gap SP
Synthetic resin of the prepregs P1 and P2 flows in to form a buffer portion. Since this synthetic resin flows into the gap SP,
In the usual method, burrs are generated before and after the guide body G2 between the tapes 42, but this is prevented because the thin film 44 exists. When the film 44 is not used, the guide body is wound around the edges of the tape 42 on both sides of the guide body G2 so that the guide body is pressed against the edges to prevent burrs. Film 44
Also in the case of using, it is preferable for the burr prevention to be formed in a state of being pressed by the tapes 42 on both sides.

In addition to the above, the guide body can be formed by using the constituent material of the rod tube. That is, when the reinforcing layer 12B on the inner peripheral side as shown in FIG. 3 is formed on the rod tube, the reinforcing layer 12B is formed not by the sheet-shaped prepreg but by the tape-shaped prepreg having a width narrower than that of the sheet. The core metal may be covered with a tube of silicon or the like having a spiral groove or an independent annular groove formed on the outer circumference so that a guide ridge can be formed on the inner surface of the rod tube, or a heat-resistant resin tape is spirally wound. The guide ridge can be integrally formed with the reinforcing layer 12B on the inner circumference of the rod tube by winding the tape-shaped prepreg on the tube or tape by winding it around the strip or the like. Others are baked according to a conventional method, and finally the tube or the resin tape is removed. With such a method, the guide can be easily formed, and since the reinforcing fiber can be arranged substantially continuously along the length direction of the tape in the tape-like prepreg, the completed guide is equivalent to the above reinforcing material. The reinforcing fibers that are formed are substantially continuous, and serve as a high-strength guide.

For the body layer of the rod tube at the tip of the rod such as the tip rod, a material having a smaller longitudinal elastic modulus is used as compared with the rod tube body layer at the base portion or the middle portion of the fishing rod, and the bending rigidity becomes smaller. The inner diameter of the rod tip portion cannot be made too small due to the outer diameter of the fishing line to be inserted, as in the case of a hollow fishing rod. However, even in such a case, a flexible rod tip can be formed.

FIG. 9 is a view for explaining an example of the form of one rod tube of the hollow fishing rod according to the present invention, for example, a longitudinal sectional view of the tip rod 12 of FIG. The spiral guide 30 is formed from the rear end portion of the rod tube 12 to a midway point in the forward direction, and the reinforcing layer 50 is integrated with the rod tube main body from the end portion 30E to the tip of the rod tube 12. There is. The reinforcing layer 50 has a thickness close to the guide height in the vicinity of the guide body terminating portion 30E, and is made thinner as it was earlier. However, when a flexible member is used as the material, the flexible tube may be thickened and the rod tube body 12 may be thinned to adjust and set the bending tone. The wall thickness in the vicinity of the terminal end portion 30E is preferably about the same as the guide height, and is set to about 85 to 105% of the guide height. As the material of the reinforcing layer, a synthetic resin or a prepreg having a high synthetic resin ratio and a weight ratio of 50% or more is used, and a material having a low flexural rigidity is preferable, but a material having a high rigidity is also used because of its reinforcing effect. Including.

The material of the spiral guide 30 is a fiber bundle of carbon fiber, glass fiber, metal fiber, ceramics fiber or the like, fiber reinforced resin prepreg in other forms, organic material such as organic fiber, particles or short fibers as a reinforcing material. There are those which are mixed, hollow fibers and hollow particles are mixed for weight reduction, and spherical particles are mixed for improving scratch resistance and wear resistance. The same applies to other examples.

FIG. 10 shows another example of the main part of the hollow fishing rod according to the present invention, in which the reinforcing layer 50A is gradually reduced in thickness from the end portion 30E to the midway point of the tip rod 12. The reinforcing layer 50B having a gradually decreasing thickness is formed on the rear side of the rod in the vicinity of the end portion of the guide, which is thicker than other regions. In order to prevent the meandering of the main body prepreg and the like when the rod tube having the integrated protruding guide 30 is reinforced to reinforce the pipe and to prevent the meandering, etc. It also fills the gap. Further, as shown in FIG. 7, the spiral guide is terminated at an intermediate position, but in a structure in which the guide is continuously wound tightly, this has the same function as the reinforcing layer in FIG. 9 and the like, as described above. .

In the above description, the front end of the spiral guide has been described, but even if the rear end of the spiral guide terminates in the middle of the rear side of the rod tube, it can be applied to this end portion.

FIG. 11 shows an arrangement region of the guide body 30 in order to prevent the stress concentration on the rod tube and the reduction of the flexural strength when the guide body 30 is integrally projected on the rod tube 10 '. The thickness t3 of Z3 is equal to the thickness t of the non-arranged region Z2.
Compared with No. 2, it is formed thicker to improve the flexural strength. The region Z1 is a joining region, and is thickened for strength reinforcement as a joining portion for joining the tip-end rods and the like on the tip side.

Although different from this wall thickness, the small-diameter rod pipe on the front side is joined to the area Z1 and the fishing line is inserted into the small-diameter hole at the rear end of the small-diameter rod pipe. In the region close to, the insertion range of the fishing line becomes narrow. Therefore, the fishing line does not come into contact with the inner surface of the rod pipe in the region Z2 between the rear end of the small-diameter rod pipe and the region Z3. Therefore, this is an unnecessary region of the guide body 30 and thus the originally unnecessary region of the guide body. It is preferable not to dispose a guide member on the rod in order to avoid stress concentration on the rod tube and to prevent hindrance of flexibility. If such a range Z2 can be secured long, the taper of the region Z2 that reduces the diameter from the region Z3 to reach the joining region Z1 can be reduced, and the change in rigidity is gradual, which is preferable. The thick and highly rigid region Z1 is separated from the highly rigid region Z3 due to the presence of the guide body, and the low rigid region Z2 is provided between the regions Z1 and Z3. It is useful for smoothly changing the deflection as a whole. This area Z2 is 30-
Take 50 mm or more, preferably about 100 mm.

FIG. 12 is a diagram for explaining another embodiment.
Between the body of the rod tube 12 and the guide body 30, the guide body 3
The form which integratedly provided the reinforcing member 52 wider than the width | variety of 0 is shown. The reinforcing member 52 extending in the entire width direction of the guide body 30 and in the front and rear thereof is a sheet-like member, and a fiber reinforced prepreg such as a scrim cloth sheet of glass fiber, a carbon tape, a synthetic resin film, paper or the like is used. However, the material is not limited to the sheet-shaped member, and may be thread-shaped synthetic resin, cotton thread, or the like. In this way, the rod tube is reinforced against the stress concentration on the rod tube around the guide body due to the integration of the guide body, and the bending strength is improved.

FIG. 13 is an explanatory view of a method for forming a rod tube with a guide having the above reinforcing layer. The heat-resistant tape 42 having an appropriate thickness approximately the height of the guide body 30 is provided on the straight or gentle taper portion 40A, leaving the taper portion 40B at the tip of the core metal 40.
The guide body 30 and the film (44) (not shown) are wound and arranged as described in FIG. 8, and the reinforcing member 52 described in FIG. 12 is wound around the end portion of the guide body 30 for further reinforcement. The prepreg 50P, the rod tube main body prepreg 12P, and the joint portion reinforcing prepreg 12P 'are wound.

The reinforcing prepreg 50P is a guide body 30.
It is a rectangular prepreg that is wound from the end portion to the front side, and corresponds to the reinforcing layer 50 in FIG. The joining portion reinforcing prepreg 12P 'has a triangular shape. In this case,
The tip of the triangle is extended to reach the end of the guide body. Therefore, although the rod pipe near the end portion of the guide body is also reinforced, it does not have to be extended to this point. Further, the main body prepreg 12P is not necessarily formed by one prepreg, but a plurality of rectangular or triangular prepregs may be wound to form a rod tube that is more flexible toward the front end, It is common to have a structure in which reinforcing fibers oriented in a direction are mainly used, and inner or outer sides thereof are sandwiched by reinforcing fibers oriented in a circumferential direction.

The reinforcing member 52 of FIG. 13 is not necessary to form the reinforcing structure of FIG. 9, and the reinforcing prepreg 50 is used.
P is shortened by eliminating the left side portion of the dashed line in the figure,
As described above, the structure in which the reinforcing layer 50A is provided up to an intermediate position of the rod tube may be used. Still further, another reinforcing layer 50B is provided in FIG.
The structure itself may be used, and further, the reinforcing prepreg 50P is not necessary to form the reinforcing structure of FIG. 12, but it goes without saying that both may be used together as shown in this manufacturing method. is there.

[0039]

As is apparent from the above description, according to the present invention, a high-strength threading through which a strength reduction near the guide body of a rod tube having a guide body integrally formed on the inside of the rod tube is prevented. A fishing rod can be provided.

[Brief description of drawings]

FIG. 1 is a side view of a hollow fishing rod.

FIG. 2 is a vertical cross-sectional view of a main part of FIG.

FIG. 3 is an enlarged view of a C portion of FIG.

FIG. 4 is a vertical sectional view of another embodiment corresponding to FIG.

5 is a vertical cross-sectional view of another example of a form corresponding to FIG.

FIG. 6 is a vertical cross-sectional view of another embodiment corresponding to FIG.

FIG. 7 is a longitudinal cross-sectional view of the essential parts of a hollow fishing rod according to the present invention.

FIG. 8 is a partial vertical cross-sectional view showing an example of a method for manufacturing a hollow fishing rod.

FIG. 9 is a vertical cross-sectional view of a single rod tube of a hollow fishing rod according to the present invention.

10 is a partial vertical cross-sectional view of a modified example of FIG.

FIG. 11 is a partial longitudinal sectional view of a hollow fishing rod according to another embodiment.

FIG. 12 is a partial vertical cross-sectional view of a hollow fishing rod according to another embodiment.

FIG. 13 is an explanatory diagram of a method of manufacturing the hollow fishing rod according to FIG. 12 and the like.

[Explanation of symbols]

10, 12 Rod tube 12H Rod tube body layer 30, G2 guide body 30H Guide body linear outer peripheral surface 32 buffer SL axial length fiber

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tomohiro Kurokawa             3-14-16 Maesawa, Higashi-Kurume City, Tokyo             Within Iwa Seiko Co., Ltd. (72) Inventor Yoshihisa Kato             3-14-16 Maesawa, Higashi-Kurume City, Tokyo             Within Iwa Seiko Co., Ltd. F term (reference) 2B019 AA01 AA02 AB32 AB33

Claims (2)

[Claims] 1. A hollow fishing rod integrally formed with a spiral guide body so as to protrude inside a rod tube reinforced by reinforcing fibers with a synthetic resin as a matrix, and the axial length of the rod tube of the guide body. Along the direction of the end of the rod tube from the end in the direction, in the vicinity of the end of the guide body, a region in which a reinforcing layer having a thickness approximately the same as the guide height of the end is integrated with the inner surface of the rod tube. A hollow fishing rod characterized by having. 2. The hollow fishing rod according to claim 1, wherein the end portion of the guide body is densely arranged along the inner circumference of the rod tube for a predetermined length in the axial direction to form the reinforcing layer.