JP2001231411A - Swinging fishing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a small-diameter fishing rod pipe from falling-off into a large- diameter fishing rod pipe by arranging a straight part of roundness inside the large- diameter fishing rod pipe, making the outer peripheral face at the rear end of the small-diameter fishing rod pipe be engaged with the inside of the large-diameter fishing rod pipe so as to stabilize a joining operation. SOLUTION: The large-diameter fishing rod pipe 1 comprises a tapered part 1a at a tip inside, a straight part 1b having an inner peripheral face of roundness behind the tapered part, a tapered part 1c having a steeper inclination than that of the tapered part 1a at a rear inner periphery of the straight part 1b and a large-diameter part 1d at a rear inner periphery of the tapered part and the length of the straight part 1b is >=10 mm and <=50 mm. The small-diameter fishing rod pipe 2 comprises a tapered part 2a at a rear end outer peripheral face, a fishing rod pipe part 2b at the front side of the tapered part, an engaging projecting part 2c and an engaging recessed part 2d at a rear end outer peripheral face of the tapered part 2a. The engaging projecting part 2c has a diameter R larger than a diameter r of the straight part 1b and the engaging recessed part 2d has a diameter r' smaller than the diameter r of the straight part 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing rod with an improved joint.

[0002]

2. Description of the Related Art Conventionally, a connecting portion of a fishing rod has a tapered taper portion formed on an inner peripheral surface of a leading end of a large diameter rod tube and a tapered taper portion formed on an outer peripheral surface of a rear end of a small diameter rod tube. Are joined together by the fitting action of However, when the joint portion becomes loosened leading to axial movement, the small-diameter rod pipe falls into the large-diameter rod pipe, and the fishing line is cut or the small-diameter rod pipe is damaged. . As proposals for solving the above disadvantages, for example, Japanese Utility Model Laid-Open No. 5-70 and Japanese Utility Model Laid-Open No. 5-882.
570 publication.

The former Japanese Utility Model Application Laid-Open No. 5-70 discloses a configuration in which a small diameter pressing portion is directed inward to a part of an inner peripheral surface at a rear portion of a taper portion inside a large-diameter rod pipe, and is arranged in an axial direction. Is formed. With this configuration, it is possible to prevent the joined small diameter rod pipe from suddenly falling into the large diameter rod pipe. The latter Japanese Utility Model Application Laid-Open No. 5-882570 discloses a configuration in which a frustoconical surface is formed inside a large-diameter rod tube, and a part of this frustoconical surface is provided with a resistor that is pressed against the outer peripheral surface of the rod end portion of the small-diameter rod body. It is formed in the longitudinal direction. Thereby, an appropriate fitting structure can be maintained and the sticking phenomenon can be avoided.

The above-mentioned Japanese Utility Model Application Laid-Open No. 5-70 and Japanese Utility Model Application Laid-Open No.
The technique of 882570 can avoid a sudden drop of the joined small-diameter rod pipe and a decrease in sticking, but has the following disadvantages. Due to the structure in which the pressing portion or the resistor is formed in a part of the inner peripheral surface of the large diameter rod pipe in the axial direction, a small diameter part is formed only in a part of the peripheral surface. Therefore, if the outer diameter of the rear end outer peripheral surface of the small-diameter rod pipe is a distorted shape that is not a perfect circle (e.g., an ellipse, an uneven shape), depending on the position of the small-diameter rod pipe, the resistance may become too large, or on the contrary, the pressing portion ( Resistor). That is.

[0005]

The problem to be solved is that, although it is possible to avoid a sudden drop of the joined small-diameter rod and a decrease in sticking, a part of the inner peripheral surface of the large-diameter rod is pressed in the axial direction. Due to the structure for forming the portion or the resistor, a small diameter portion is formed only on a part of the peripheral surface. for that reason,
If the outer diameter of the outer peripheral surface of the small-diameter rod pipe is an irregular shape that is not a perfect circle (eg, an elliptical shape or an uneven shape), the resistance may become too large depending on the position of the small-diameter rod pipe, or on the contrary, the pressing portion (resistor ).

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, an object of the present invention is to provide a straight circular straight portion inside a large-diameter rod pipe so that the outer peripheral surface of the rear end of a small-diameter rod pipe can be fitted to the pipe during a joining operation. An object of the present invention is to provide a fishing rod which stabilizes and prevents a small-diameter rod from suddenly falling into a large-diameter rod.

[0007]

In order to solve the above-mentioned problems, the present invention according to claim 1 has a tapered tape on the inner peripheral surface of the leading end of the large-diameter rod tube and the outer peripheral surface of the rear end of the small-diameter rod tube. In a swing fishing rod having a tapered portion formed so as to be freely fittable, a tapered taper portion is formed inside the distal end of the large-diameter rod tube, and a straight portion is formed at a rear portion of the tapered portion. The main feature is that a large diameter portion is formed at a rear portion of the straight portion, and an engagement convex portion is formed at a rear end outer peripheral surface of the small diameter rod tube. According to a second aspect of the present invention, the rear end of the engaging convex portion of the small-diameter rod tube has a diameter circumscribed by the engaging convex portion larger than the diameter of the straight portion of the large-diameter rod tube, and the large-diameter rod tube. The inner periphery of the straight portion is larger than the outer periphery of the rear end of the small-diameter rod.

According to the third aspect of the present invention, the draw-out resistance when the engaging projection on the rear end outer peripheral surface of the small-diameter rod pipe and the straight-shaped part of the large-diameter rod pipe are fitted is 2.5 N or more. 60N, and 10 mm or more in the longitudinal direction within this resistance range.
The gist of the invention is that it can be moved by a length of not more than mm. The present invention according to claim 4 provides a tapered tape of a large diameter rod pipe.
The gist is that the anti-frictional resistance of the straight portion is larger than the frictional resistance of the part.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first and second aspects of the present invention,
The large-diameter rod tube 1 has a straight-shaped straight portion 1b formed at the rear of the tapered taper portion 1a.
b, engaging projections 2c, 2e, 2g, 2i, 2k, 2n, 2p, 2r, 2r of the small-diameter rod 2 having a diameter R larger than the diameter r.
Since t is engaged, even if the circumferential position of the small-diameter rod tube 2 with respect to the large-diameter rod tube 1 is arbitrary, stable sliding resistance can be obtained with the straight-shaped portion 1b and the tapered taper portion 1a. And tapered tape
When joining the tapered portions 2a, the straightened portion 1b may be loosened during fishing, or the tapered tapered portion 1a and the tapered tapered portion 2a may be disconnected during storage. And the engaging projections 2c, 2e,
The engagement of 2g, 2i, 2k, 2n, 2p, 2r, and 2t reliably prevents the small-diameter rod tube 2 from suddenly falling into the large-diameter rod tube 1, and facilitates the attachment / detachment operation at the time of joining.

According to the third aspect of the present invention, the engaging projections 2c, 2e, 2g, 2i, 2k, 2n on the outer periphery of the rear end of the small diameter rod pipe 2 are provided.
The pull-out resistance when the 2p, 2r, 2t and the straight portion 1b of the large-diameter rod tube 1 are fitted is in the range of 2.5N to 60N, and within this resistance range, 10 mm or more and 50 mm in the longitudinal direction. By making it possible to move the following length, the angler can more easily perform the attachment / detachment operation and can surely prevent falling off.

According to the fourth aspect of the present invention, the straight of the large-diameter rod tube 1 is determined by the frictional resistance between the tapered tapered portion 1a of the large-diameter rod tube 1 and the tapered tapered portion 2a of the small-diameter rod tube 2. Engagement part 2c, 2e, 2g, 2i, 2k, 2n of the shape part 1b and the small diameter rod pipe 2,
When the anti-friction resistance of 2p, 2r, and 2t is set to be large, prevention of sticking and removal can be more reliably achieved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 6 show a first embodiment, FIG. 1 is a sectional side view of a fishing rod, and FIG. FIG. 3A is a cross-sectional rear view of the large-diameter rod pipe taken along the line F3-F3 in FIG. 1, and FIG. 3B is a rear view and a view illustrating the rear end of the small-diameter rod pipe. 4 is a cross-sectional side view of a swing fishing rod in which a small-diameter rod is partially housed in a large-diameter rod, and FIG. 5 is a diagram illustrating a pulling force, a pushing force, and a moving amount of a small-diameter rod extracted from a large-diameter rod. FIG. 6 is a relational graph, and FIG. 6 shows (a) a cross-sectional side view of a small-diameter rod pipe and a side view of a core bar, and (b) a front view of the core bar, in which an engaging uneven portion is formed on the outer peripheral surface of the rear end of the small-diameter rod pipe.

In the fishing rod, a tapered taper portion 2a on the outer periphery of the rear end of the small-diameter rod tube 2 is fitted and joined to a tapered taper portion 1a on the inner end of the large-diameter rod tube 1. The large-diameter rod tube 1 has a tapered tapered portion 1a on the inside of the tip, a straight-shaped straight portion 1b at the rear of the tapered tapered portion 1a, and a straight-shaped portion 1b. The tapered taper portion 1c, which is steeper than the tapered taper portion 1a, is formed on the rear inner periphery, and a large-diameter portion 1d on the rear inner periphery. The length of the straight part 1b is 10m
It is formed in a length of not less than m and not more than 50 mm.

The small diameter rod tube 2 has a tapered taper on the outer peripheral surface of the rear end.
An engaging convex portion 2c and an engaging concave portion 2d are formed on a portion 2a, a front rod portion 2b of the tapered taper portion 2a, and an outer peripheral surface of a rear end of the tapered taper portion 2a. The engaging convex portion 2c has a diameter R larger than the diameter r of the straight portion 1b, and the engaging concave portion 2d
Are formed with a diameter r 'smaller than the diameter r of the straight portion 1b. The outer peripheral surface of the engaging projection 2c is a circumscribed circle a.

The large-diameter rod tube 1 and the small-diameter rod tube 2 of the fishing rod are wound around a not-illustrated core metal by winding a prepreg sheet (not shown) cut into a tape-shaped rectangular shape, and then outside the same. It is taped, placed in a heating furnace, and integrally formed by thermosetting according to a conventional method. The prepreg sheet is, for example, a sheet in which high-strength fibers such as carbon fiber, glass fiber, aramid fiber, alumina fiber, Kepler fiber, other organic fibers, and inorganic fibers are woven in an epoxy resin, a phenol resin, It is formed by impregnating a thermosetting synthetic resin such as a polyester resin.

When the engaging projection 2c and the engaging recess 2d are formed on the outer peripheral surface of the rear end of the small-diameter rod tube 2, the rear end of the small-diameter rod tube 2 is fitted to the core 3 shown in FIG. Then, the outer periphery of the rear end of the small diameter rod pipe 2 is ground by a centerless grinding machine or the like. FIG.
As shown in (a) and (b), a plurality of notches 3a are formed on the outer periphery. As described above, when the rear end of the small-diameter rod tube 2 is fitted to the cored bar 3 and the outer periphery of the rear end of the small-diameter rod tube 2 is ground, the outer periphery of the small-diameter rod tube 2 corresponding to the positions of the plurality of cutouts 3a becomes When a grindstone (not shown) hits, it bends inward and deforms and is not ground.
When the small-diameter rod tube 2 is removed from the metal core 3, a portion that has been deformed and not ground becomes the engaging convex portion 2c, and the ground portion becomes the engaging concave portion 2d.

When the large-diameter rod tube 1 and the small-diameter rod tube 2 of the swing fishing rod are formed as described above and the small-diameter rod tube 2 is pulled out of the large-diameter rod tube 1 from the stored state, the large-diameter rod tube 1 A tapered tapered portion 2a, an engaging convex portion 2c and an engaging concave portion 2d at the rear end of the small-diameter rod tube 2 in the large-diameter portion 1d have a straight shape through the tapered tapered portion 1c. The tapered taper portion 2a on the outer periphery of the rear end of the small-diameter rod tube 2 is fitted to the tapered taper portion 1a of the large-diameter rod tube 1 and joined together. The relationship between the pulling force and the moving amount at this time is as shown in FIG.
As compared with the conventional example of No. 0, it is pulled out with a substantially constant tensile force by the straight portion 1b. When it is stored from the pulled-out state, it is pushed in the reverse process, and the relationship between the pressing force and the movement amount is as shown in FIG.

The pull-out resistance when the straight portion 1b of the large-diameter rod 1 and the engaging projection 2c of the small-diameter rod 2 are fitted is 2.
It is set to be in the range of 5N to 60N. Because of the frictional resistance between the tapered tapered portion 1a of the large diameter rod 1 and the tapered tapered portion 2a of the small diameter rod 2, the straight portion 1 of the large diameter rod 1 is formed.
The anti-frictional resistance of the engaging projection 2c of the small diameter rod tube 2 with the b is set large.

When the swing fishing rod is constructed as described above, the large-diameter rod tube 1 is formed with a straight-shaped straight portion 1b at the rear portion of the tapered taper portion 1a, and the strain is formed. -G 1b
Engaging projection 2 of small diameter rod pipe 2 having a diameter R larger than diameter r
Therefore, even if the circumferential position of the small-diameter rod tube 2 with respect to the large-diameter rod tube 1 is arbitrary, stable sliding resistance can be obtained with the straight-shaped portion 1b, and the tapered tapered portion 1a. And tapered tape
When joining the tapered portions 2a, the straightened portion 1b may be loosened during fishing, or the tapered tapered portion 1a and the tapered tapered portion 2a may be disconnected during storage. The sudden engagement of the small-diameter rod tube 2 into the large-diameter rod tube 1 is reliably prevented by the engagement of the engagement projection 2c with the engaging projection 2c, and the detaching operation at the time of joining is easy.

The pull-out resistance when the engaging projection 2c on the outer periphery of the rear end of the small diameter rod tube 2 and the straight portion 1b of the large diameter rod tube 1 are fitted is in the range of 2.5N to 60N, and In this resistance range, the length can be moved in the longitudinal direction by 10 mm or more and 50 mm or less, so that the angler can more easily perform the attaching / detaching operation,
Dropouts can be reliably prevented. Due to the frictional resistance between the tapered tapered portion 1a of the large diameter rod 1 and the tapered tapered portion 2a of the small diameter rod 2, the straight-shaped portion 1b of the large diameter rod 1 and the small diameter rod 2 are engaged. If the anti-frictional resistance of the convex portion 2c is set large, the prevention of sticking and the prevention of detachment can be more reliably achieved.

FIGS. 7 and 8 show a second embodiment. FIG. 7 is a sectional side view of a swing fishing rod, and FIG. 8 is a plan view of a prepreg on which a small-diameter rod pipe is formed.

In the second embodiment, the tapered tape at the rear end of the small-diameter rod tube 2 is used.
An engagement projection 2e and an engagement recess 2f are formed on the outer periphery of the part 2a. When the engaging projection 2e and the engaging recess 2f are formed, the prepreg 4 in which the main body of the small diameter rod tube 2 is formed and the prepreg 5 in which the tapered tapered portion 2a at the rear end are formed are not shown. Wound on a cored bar. The prepreg 5 is formed with a notch 5a in which the engaging recess 2f is formed. Other configurations are substantially the same as those of the first embodiment.

FIG. 9 is a modified example of the first embodiment, and FIG. 9 is a sectional side view of a swing fishing rod.

In a modification, the straight portion 1 of the large-diameter rod tube 1 is used.
A tapered portion 1e having a gentle inclination is formed on the inner periphery of the rear portion b. Other configurations are substantially the same as those of the first embodiment.

FIGS. 10 and 11 show a third embodiment, and FIG. 10 is a sectional side view of a swing fishing rod showing a small diameter rod tube in a side view.
1 is an enlarged rear view showing the rear end of the small diameter rod pipe.

In the third embodiment, a tapered taper portion 2a is provided at the rear end of the small-diameter rod tube 2, and a front rod portion 2a of the tapered taper portion 2a.
b and an engaging convex portion 2g on the outer peripheral surface of the rear end of the tapered taper portion 2a.
And an engagement recess 2h are formed. The engaging projection 2g has a diameter R larger than the diameter r of the straight portion 1b of the large diameter rod tube 1, and the engaging recess 2h has a diameter r of the straight portion 1b.
It is formed with a smaller diameter r '. Other configurations are substantially the same as those of the first embodiment.

FIGS. 12 to 14 show a fourth embodiment.
Is a sectional side view of the fishing rod, FIG. 13 is a sectional side view and a partially enlarged sectional side view of the fishing rod showing the small-diameter rod tube in a side view, and FIG. It is a cross-sectional side view of the stored fishing rod.

In the fourth embodiment, the straight portion 1f of the large diameter rod tube 1 is formed to have a larger diameter than the straight portion 1b of the first embodiment, and the friction tube 6 made of rubber or the like is fixed. In addition, a resin or a fiber that increases frictional resistance during molding of the large-diameter rod tube 1 is wound and molded. Other configurations are substantially the same as those of the first embodiment.

FIGS. 15 to 17 show a fifth embodiment.
16 is a cross-sectional side view and a partially enlarged cross-sectional side view of a fishing rod, FIG.
FIG. 17 is a rear view showing a rear end portion of the small-diameter rod pipe and a partially enlarged rear view, and FIG. 17 is a graph showing the relationship between the pulling force for pulling out the small-diameter rod pipe from the large-diameter rod pipe, the pressing force for pushing, and the amount of movement.

In the fifth embodiment, a circumferential groove-shaped concave portion 1g is formed on the inner peripheral surface of the rear portion of the tapered taper portion 1a of the large diameter rod tube 1 after the tapered tapered portion 2a of the small diameter rod tube 2. A plurality of engaging projections 2i and an arcuate engaging recess 2j are formed on the outer peripheral surface of the end. Other configurations are substantially the same as those of the first embodiment.

In the fifth embodiment, when the large-diameter rod tube 1 and the small-diameter rod tube 2 of the fishing rod are formed as described above and the small-diameter rod tube 2 is pulled out of the stored state in the large-diameter rod tube 1, A tapered taper portion 2a and an engaging convex portion 2i at the rear end of the small diameter rod tube 2 in the large diameter portion 1d of the large diameter rod tube 1 pass through the tapered taper portion 1c and have a straight shape. It is pulled out while being engaged with the portion 1b,
The plurality of engaging projections 2i are engaged with g. The relationship between the pulling force and the moving amount at this time is as shown in FIG. 17, and the straight portion is pulled out with a substantially constant pulling force as compared with the conventional example of FIG. When it is stored in the pulled-out state, it is pushed in the reverse process, and the relationship between the pressing force and the movement amount is as shown in FIG. Other configurations are substantially the same as those of the first embodiment.

FIG. 18 shows a sixth embodiment, and FIG. 18 is a sectional side view and a partially enlarged sectional side view of a fishing rod.

In the sixth embodiment, a concave portion b and a convex portion c are formed in the straight portion 1b of the large diameter rod tube 1. The concave portion b and the convex portion c may be formed on the tapered taper portion 1a. The irregularities may be formed in other shapes. Other configurations are substantially the same as those of the first embodiment.

FIG. 19 shows a seventh embodiment, and FIG. 19 is a rear view of various shapes showing a rear end portion of a small diameter rod pipe.

In the seventh embodiment, (a) has a triangular outer periphery at the rear end of the small-diameter rod tube 2 and is formed with an engaging convex portion 2k and an engaging concave portion 2m. In (b), the outer periphery of the rear end of the small-diameter rod 2 is formed of a polygonal engaging projection 2n and an engaging recess 2o. (C) is formed on the outer periphery of the rear end of the small-diameter rod 2 with an engagement projection 2p and an arcuate engagement recess 2q. In (d), an elliptical engaging convex portion 2r and an engaging concave portion 2s are formed on the outer periphery of the rear end of the small diameter rod tube 2. In (e), an engagement projection 2t and an arcuate engagement recess 2u are formed on the outer periphery of the rear end of the solid small diameter rod tube 2 '. Other configurations are substantially the same as those of the first embodiment.

The shapes of the engaging projections and the engaging recesses described in the second embodiment and below may be applied to other embodiments.

[0037]

The present invention is embodied in the form described above and has the following effects.

According to the first and second aspects of the present invention, the large-diameter rod pipe is formed with a straight portion having a perfect inner peripheral surface at the rear portion of the tapered taper portion, the diameter being larger than the diameter of the straight portion. Since the engaging projections of the small-diameter rod pipe having a large diameter are engaged, even when the circumferential position of the small-diameter rod pipe with respect to the large-diameter rod pipe is arbitrary, stable sliding resistance can be obtained with the straight-shaped part. When joining the tapered taper part and the tapered taper part, even if the splicing becomes loose during fishing or the joint between the tapered taper part and the tapered taper part is removed during storage. By the engagement between the straight portion and the engaging projection, the small-diameter rod tube is reliably prevented from suddenly dropping into the large-diameter rod tube, and the detaching operation at the time of joining is easy.

According to the third aspect, the draw-out resistance when the engaging projection on the outer periphery of the rear end of the small-diameter rod pipe and the straight-shaped part of the large-diameter rod pipe are fitted is in the range of 2.5N to 60N. In addition, by being movable in the longitudinal direction by a length of 10 mm or more and 50 mm or less in this resistance range, the angler can more easily perform the attaching / detaching operation, and can reliably prevent the fisher from falling off.

According to a fourth aspect of the present invention, a tapered taper for a large diameter rod pipe is provided.
If the anti-frictional resistance of the straight projection of the large-diameter rod and the engaging projection of the small-diameter rod is set to be greater than the frictional resistance of the tapered portion of the small-diameter rod and the small-diameter rod, it is possible to prevent sticking. Dropout prevention can be achieved more reliably.

[Brief description of the drawings]

FIG. 1 is a sectional side view of a swing fishing rod in a first embodiment.

FIG. 2 is a cross-sectional side view of the swing fishing rod showing the small-diameter rod pipe in a side view.

3A is a cross-sectional rear view of the large-diameter rod pipe taken along the line F3-F3 in FIG. 1, and FIG. 3B is a rear view showing the rear end of the small-diameter rod pipe.

FIG. 4 is a cross-sectional side view of a swing fishing rod in which the small-diameter rod pipe is partially housed in a large-diameter rod pipe.

FIG. 5 is a graph showing a relationship between a pulling force for pulling out a small-diameter rod tube from the large-diameter rod tube, a pressing force for pushing, and a movement amount.

6A and 6B are a sectional side view of a small-diameter rod pipe and a side view of a core metal, in which an engagement concave-convex portion is formed on a rear end outer peripheral surface of the same diameter rod pipe, and a front view of the core metal.

FIG. 7 is a sectional side view of a swing fishing rod in a second embodiment.

FIG. 8 is a plan view of a prepreg from which the small-diameter rod pipe is formed.

FIG. 9 is a sectional side view of a swing fishing rod according to a modification of the first embodiment.

FIG. 10 is a sectional side view of a swing fishing rod in a third embodiment, showing a small-diameter rod pipe in a side view.

FIG. 11 is an enlarged rear view showing a rear end portion of the small diameter rod pipe.

FIG. 12 is a sectional side view of a swing fishing rod in a fourth embodiment.

FIG. 13 is a cross-sectional side view and a partially enlarged cross-sectional side view of a swing fishing rod showing the small-diameter rod pipe in a side view.

FIG. 14 is a sectional side view of a swing fishing rod in which the small-diameter rod tube is partially accommodated in a large-diameter rod tube.

FIG. 15 is a sectional side view and a partially enlarged sectional side view of a swing fishing rod in a fifth embodiment.

FIG. 16 is a rear view and a partially enlarged rear view showing the rear end of the small diameter rod pipe.

FIG. 17 is a graph showing a relationship between a pulling force for pulling out a small-diameter rod pipe from the large-diameter rod pipe, a pressing force for pushing, and a moving amount.

FIG. 18 is a sectional side view and a partially enlarged sectional side view of a fishing rod used in a sixth embodiment.

FIG. 19 is a rear view of various shapes showing the rear end of the small-diameter rod in the seventh embodiment.

FIG. 20 is a graph showing a relationship between a pulling force for pulling out a small-diameter rod pipe from a conventional large-diameter rod pipe and an amount of movement.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Large diameter rod pipe 1a Tapered taper part 1b Straight-shaped part 1d Large diameter part 2 Small diameter rod pipe 2a Tapered taper part 2c, 2e, 2g, 2i, 2k, 2n, 2p, 2r, 2
t engaging projections 2d, 2f, 2h, 2j, 2m, 2o, 2q, 2s, 2s
u Engagement concave part a Outer circle r Diameter of straight part R Diameter of engagement convex part r 'Diameter of engagement concave part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenichi Kameda 3-14-16 Maesawa, Higashi-Kurume-shi, Tokyo Inside Daiwa Seiko Co., Ltd. No. Daiwa Seiko Co., Ltd. F-term (reference) 2B019 AA02 AA10

Claims (4)

[Claims] A fishing rod in which a tapered taper portion is formed on an inner peripheral surface of a front end of a large diameter rod tube and an outer peripheral surface of a rear end of a small diameter rod tube so as to be fitably connectable. A tapered taper portion is formed inside the distal end of the large-diameter rod tube, a straight portion is formed at the rear portion of the taper portion, and a large-diameter portion is formed at the rear portion of the straight portion. And an engaging projection formed on an outer peripheral surface of a rear end of the small-diameter rod tube. 2. A rear end of the engaging projection of the small-diameter rod pipe, the diameter of the circumscribed circle of the engaging projection is larger than the diameter of the straight-shaped part of the large-diameter rod pipe, and the straight of the large-diameter rod pipe. 2. The fishing rod according to claim 1, wherein the inner peripheral length of the portion is larger than the outer peripheral length of the rear end of the small diameter rod. 3. The pull-out resistance when the engaging projection on the rear end outer peripheral surface of the small-diameter rod pipe and the straight-shaped part of the large-diameter rod pipe are fitted is in the range of 2.5N to 60N, and 2. The fishing rod according to claim 1, wherein the rod is movable in the longitudinal direction by a length of 10 mm or more and 50 mm or less within this resistance range. 4. The fishing rod according to claim 1, wherein the anti-frictional resistance of the straight portion is larger than the frictional resistance of the tapered tapered portion of the large-diameter rod tube.