JP2001069879A - Telescopic outguide fishing rod and connector to be used therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject fishing rod designed to enable the rod pipe to be cleaned easily and properly and enable even an unfixed outguide set in failure to be replaced or repaired readily. SOLUTION: This telescopic outguide fishing rod is so designed that a smaller-diameter fishing rod pipe on the rod tip side is withdrawable and separable from the tip of a larger-diameter fishing rod pipe on the rod foot side; wherein connectors 5, 6, 7 are interposed between the rod tail outer circumference of the smaller-diameter fishing rod pipe and the rod tip inner circumference of the larger-diameter fishing rod pipe, and by detaching these connectors, the smaller-diameter fishing rod pipe can be withdrawn and separated from the larger-diameter fishing rod pipe; furthermore, it is possible that the respective basal portions 51, 61, 71 of these connectors have the function of fishline contact ring.

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 an out-guide rod for swinging.

[0002]

2. Description of the Related Art In recent years, attention has been paid to fishing rods that are functionally superior, and new products with improved structures and functions are being put on the market one after another. By the way, the fishing rod includes a connecting rod, a drawing rod, and the like.These fishing rods are provided with a line guide for guiding the fishing line inside the rod of each rod pipe, and a fishing line is provided outside the rod. There is an out guide rod provided with a thread guide for guiding.

[0003] Among these fishing rods, an out guide rod for swinging, that is, a swinging rod provided with an out guide (line guide) is very convenient to carry because it is possible to sequentially store each rod tube in the original rod. . For example, in the case of a four-type swinging out guide rod, each rod pipe, that is, the front of the former rod, the ear rod, and the head rod can be sequentially stored in the former rod. In addition, when used, each rod tube is pulled out from the tip rod, and they are extended and used. That is, the rear end portion of the rod pipe on the front side of each rod (for example, in front of the former rod) is joined to the distal end portion of the rod pipe on the base side of each rod (for example, the former rod) to form one swing rod.

[0004] In the out guide swinging rod, a top guide is fixed to the tip of the head rod, and a mouth guide is fixed to each rod tip from the ear rod to the original rod.
A plurality of floating guides are slidably provided on each rod tube in front of the former rod. By the way, at the fishing spot, foreign objects such as dust, sand, water (salt water), etc. often adhere to the surface of the rod while handling the rod. In particular, in sea fishing, it is often experienced that salt is solidified on the surface of the rod when the rod is left as it is after seawater is adhered to the surface of the rod after use.

[0005] In the case where the swinging rod is stored in such a state, when the swinging rod is shaken thereafter, foreign matter is caught in the joint portion of each rod pipe, and smooth swinging is not performed. Then, the coating film on the rod surface may be damaged due to the bite of the foreign matter. However, with the conventional swinging rod, it is not possible to completely remove the foreign matter adhering to the rod pipe unless the rod pipes are taken out from the tail of the original rod after fishing.

That is, in extreme cases, the top guide and the floating guide of the head rod are all removed from the head rod, and then the head rod is taken out from the bottom of the former rod. Similarly, the mouth guide of the ear rod and its floating guide, and Therefore, the mouth guide in front of the original rod and its floating guide must be completely removed to separate the respective rod pipes. Naturally, it is almost impossible to perform such an extremely troublesome operation. as a result,
Cleaning for rod maintenance has been neglected,
The quality of the fishing rod deteriorates, which adversely affects the operation and handling of the fishing rod. On the other hand, there is a problem in repairing the conventional draw rod.

In general, if one of the floating guides provided on the rod breaks down, the target out guide must be removed from the rod pipe in order to repair or replace it. If the malfunction is, for example, the floating guide provided on the ear rod, it is necessary to remove the mouth guide fixed to the tip of the ear rod, the top guide of the ear rod and the floating guide. In this way, even when replacing a floating guide that has failed,
The task is very hard. As described above, it has been extremely inconvenient to clean the inside of the rod pipe or replace or repair the out guide in the rod. Improvements for that purpose have been desired.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above technical problems. That is, an object of the present invention is to provide a swing out guide rod that can easily and accurately perform cleaning of a rod pipe. Another object of the present invention is to provide a swing-out guide rod that can easily replace or repair a broken idle out-guide.

[0009]

Means for Solving the Problems The present inventors have conducted intensive studies on such problems, and as a result,
The present inventor has found that it is possible to easily disassemble the swinging out guide rod by interposing a detachable coupling between the rod pipes, and has completed the present invention based on this finding.

That is, the present invention relates to (1) a swing out guide rod, in which a stick pipe on the tip side of the stick can be pulled out and separated from the tip of the stick pipe on the base side of the stick. Be on the pole.

And (2) a swing-out guide rod in which the small-diameter rod pipe on the rod tip side can be pulled out and separated from the rod tip of the large-diameter rod pipe on the rod base side. An out-guide rod for swinging, in which a coupling is interposed between the outer periphery of the buttocks and the inner periphery of the tip of the large-diameter rod, and the coupling is removed so that the small-diameter rod can be pulled out from the large-diameter rod and separated. Exists.

Also, (3) the coupling tool is a rod of a large-diameter rod pipe which is larger in diameter and integrated with the hollow part which is in pressure contact with the outer periphery of the rod tail formed in a tapered shape of the small-diameter rod pipe. The present invention resides in the swinging out guide rod according to the above (2), which has a base engaged with the outer periphery.

Further, (4) the base of the coupling tool is provided in the outgoing out-guide rod of (3), which has the function of a fishing line contact ring.

Further, (5) the base of the coupling tool is provided in the outgoing out guide rod of (3) having a function of a fishing line guide ring.

(6) An out-guide rod for swinging in which the small diameter rod pipe on the rod tip side can be pulled out and separated from the rod tip of the large diameter rod pipe on the rod base side. A coupling tool is interposed between the outer periphery of the rod end and the inner periphery of the rod tip of the large-diameter rod pipe,
By removing the coupling, the small-diameter rod can be pulled out from the large-diameter rod and separated from the large-diameter rod, and the coupling has a tapered hollow portion that presses against a tapered outer periphery of the small-diameter rod. A large-diameter rod tube having a larger diameter than the hollow portion and having a base engaged with the outer periphery of the rod tip of the large-diameter rod tube, wherein the base has a function of a contact line for a fishing line. Exist.

(7) A coupling tool which is interposed between the outer periphery of the rod end of the small-diameter rod tube and the inner periphery of the tip of the large-diameter rod tube so as to be separably coupled to each other. A coupling member comprising a hollow portion pressed into contact with the outer periphery of the rod-shaped portion formed in a tapered shape and a base portion detachable from the outer periphery of the rod tip of the large-diameter rod tube that is larger and integrated than the hollow portion. Exist.

Further, (8) the base of the coupler is the coupler of the above (7), which has an engaging portion which engages with the outer periphery of the rod tip of the large diameter rod pipe.

The present invention also provides (9) the connecting tool of (8), wherein a guide ring of a fishing line is formed at the base of the connecting tool.

The present invention also provides (10) the coupling device as described in (8), wherein a fishing line contact ring is formed at the base of the coupling device.

Further, (11) a coupling tool which is interposed between the outer periphery of the rod end of the small-diameter rod tube and the inner periphery of the tip of the large-diameter rod tube so as to be separably coupled to each other, wherein the small-diameter rod tube is provided. A tapered hollow portion pressed into contact with the outer periphery of the rod end formed in a tapered shape, and a base portion engaged with the outer periphery of the rod tip of the large-diameter rod tube which is larger in diameter and integrated with the hollow portion, The base consists in a coupling which has the function of a fishing line contact ring.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A preferred embodiment of a swing-out guide rod according to the present invention will be described below with reference to the drawings. FIG. 1 shows a fastener 5 according to the invention.
FIG. 2 is an external view showing an example of a whole outgoing rod, particularly a four outgoing rod A, provided with the rod. FIG. 2 is similar to FIG.
3 is an enlarged view of a main part showing a connecting tool 5 between a former rod 1 and a former rod front 2 among connecting parts of respective rod pipes in FIG.

The swinging rod A here is a multi-staged rod composed of a former rod 1, a former rod 2, an ear rod 3, and an ear rod 4, and each rod (original rod) is provided in the former rod. The front 2, front end rod 3, and front end rod 4) can be sequentially pushed into the storage state, and conversely, each of the rod pipes (front 2, front rod 2,.
The ear rod 3 and the ear rod 4) can be sequentially used from the ear rod 4 by swinging them out (see FIG. 1). In general, each rod pipe (1, 2, 3, 4) is formed in a tapered shape so that the outer diameter gradually decreases toward the tip, and in a state where each rod pipe (2, 3, 4) is swung out, It becomes a tapered rod as a whole.

As the structure of the swinging rod A, when each of the rod pipes is swung out, the rod pipe on the tip side of each rod is connected to the rod pipe on the base side of each rod. More specifically, it is a structure in which the bottom end portion of the small-diameter rod tube on each rod tip side and the rod tip portion of the large-diameter rod tube on the base side of each rod are joined and prevented from falling off. That is, the bottom of the former pole 2 is the tip of the former pole 1, the tip of the pole 3 is the tip of the front 2 and the tip of the tip 4 is the tip of the pole. 3 are respectively connected to the tip portions of the poles to prevent them from coming off.

A top guide G1, which is an out guide, is attached to the tip of the tip rod 4 by extrapolation and is fixed. The tip end of the tip rod 3, the front part 2 of the former rod, and the tip of the former rod 1 (mouth portion).
Is provided with a coupler 5 described in detail later. In addition, between the top guide G1 of the head rod 4 and the coupling tool 5 of the ear rod 3, there are a plurality of movable out guides G which can move.
It is common that 2 is provided. Similarly, the ear rod 3
A plurality of floating out guides G2 are provided between the connecting tool 5 of the front pole 2 and the connecting tool 5 of the front pole 2 and between the connecting tool 5 of the front pole 2 and the connecting tool 5 of the main pole 1. I have.

A connecting member 5 is removably attached to the ear-holding rod 3, the former rod 2 and the opening of the former rod 1 according to the present invention. The major feature is that the small-diameter rod pipe on the front side can be separated from the rod tip of the large-diameter rod pipe on the base side of the rod.

This point will be described below. The connecting portion (joint portion) of the rod pipe in the swung state is, as shown in FIG. 2, the outer periphery of the rod end of the small diameter rod pipe 2 and the inside of the pole tip of the large diameter rod pipe 1. This is a state in which the coupling tool 5 is interposed between the outer circumference and the circumference, and the rod portions (1, 2) are coupled to each other in a retaining state by the coupling portion 5 and securely held (see FIG. 3 below). In more detail). Note that the outer periphery of the rod end of the small-diameter rod tube is formed smaller than the inner periphery of the rod tip of the large-diameter rod tube.

FIGS. 3A and 3B are views showing the coupling device 5 according to the first embodiment of the present invention, wherein FIG. 3A is a partial cross-sectional front view, FIG. 3B is a left side view, and FIG. It is a right side view.
As shown in the figure, the coupling tool 5 includes a tapered (having a tapered surface) hollow portion 52 that is in pressure contact with a tapered outer periphery of a rod end formed in a tapered shape of a small-diameter rod tube (for example, the front of the former rod 2). A larger diameter and integrated base portion 51. For example, when the former rod 2 is pulled out from the state in which the former rod 2 has been put into the former rod by the coupling tool 5, when the former rod 2 is pulled out from the former rod 1,
Stops without being separated. The base portion 51 is provided with a male screw portion 51A (that is, an engaging portion) so as to correspond to the female screw portion 1A (that is, the engaging portion) formed on the outer periphery of the rod tip of the large diameter rod pipe.

If the outer peripheral surface of the base 51 is provided with a gripping portion 51B which has been subjected to unevenness processing, knurling, or the like, the coupling tool 5
Is hard to slip when screwing into a large diameter rod pipe. Hollow part 52
Is formed so as to correspond to the inner peripheral shape of the large-diameter rod tube to which it is attached, and preferably has a slow taper shape. Therefore, the hollow portion 52 of the coupling tool is formed so as not to rattle with respect to the large diameter rod pipe.

The inner diameter of the hollow portion 52 is formed smaller than the outer diameter of the floating out guide G2 provided on the smaller diameter rod tube ahead of the hollow portion 52. The outer diameter of the attached fitting 5 is formed to be larger than the inner diameter of the floating out guide G2 disposed on each of the rod pipes.

For example, in the case of the coupler 5 between the former rod 1 and the former rod 2, the inner diameter of the hollow portion 52 of the coupler attached to the mouth portion of the former rod 1 is the free movement provided in the former rod 2. The shape is smaller than the outer diameter of the out guide G2. Further, the outer diameter of the coupling tool 5 attached to the mouth portion of the former rod front 2 is larger than the inner diameter of the floating out guide G2 provided on the former rod front 2. Here, as a material of the coupling, ceramic, a resin material having low friction (for example, Teflon (registered trademark)), or a metal is used.
It is preferable to integrally form a low friction ceramic.

A general conventional swing rod has a mouth guide attached at the tip of each rod tube except for the tip rod 4, but by using the coupling tool 5 of such a low friction material. In addition, wear when the fishing line comes into contact with the surface of the coupling tool 5 is prevented as much as possible.

As described with reference to FIG. 2, for example, at the joint (joint portion) between the former rod 1 and the former rod 2, there is a gap between the outer periphery of the former rod 2 and the inner periphery of the former rod 1. Has a coupler 5 interposed therebetween.
The coupling tool 5 is mounted and fixed by screwing (that is, engaging) the male screw portion 51A with the female screw portion 1A formed on the outer periphery of the pole tip of the original rod 1, and the hollow portion 52 of the coupling tool.
Is in a state of being pressed against the outer periphery of the pole in front of the former pole 2. Therefore, the connecting tool 5 can securely fix the original rod 1 and the original rod front 2 by the base portion 51 and the hollow portion 52. In the above, the connecting portion between the former rod 1 and the former rod front 2 has been described, but the former rod 2 and the ear rod 3 and the ear rod 3 and the head rod 4 are also surely connected. be able to.

FIG. 4 is a diagram for explaining a state in which the front part 2 of the former rod, which is a small-diameter rod pipe, is pulled out from the former rod 1 which is a larger-diameter rod pipe. Considering the case where the front rod 2 is pulled out from the tip of the main rod 1 and removed, first, the connected state (that is, the engaged state) of the main rod 1 and the front rod 2 is released. That is, once the front rod front 2 is pushed into the main rod 1 to release the press-contact state between the connecting tool 5 and the front rod front 2, and after confirming that, the connecting tool 5 is turned to screw into the engaged state (engagement state). State) and remove from the original rod 1.

By pulling out the front rod 2 from the main rod 1, the main rod 1, the front rod 2, and the coupler 5 can be disassembled independently. Similarly, by removing the connecting member 5 of the front pole 2, the front of the former rod 2 is separated from the holding rod 3, and by removing the connecting member 5 of the holding rod 3, the holding rod 3 and the tip rod 4 are removed. Are separated. That is, all the rod pipes can be separated by removing the fittings attached to each rod pipe (not shown).

Then, foreign substances adhering to the surface and inner surface of the rod can be reliably removed from each of the naked rod pipes (in the case of the tip rod 4, the floating out guide is attached to the tip rod 4). The cleaning of the rod may be performed with G2 and the fastener left.) At the same time, the coupling tool 5 and each floating out guide can be washed. Thus, maintenance work such as cleaning can be easily performed, and replacement or repair of the floating out guide can be easily performed.

After the cleaning of the rod or the replacement or repair of the guide is completed, each rod tube (1, 2, 3, 3) is connected via a coupling.
4) can be easily assembled and integrated. In this case, for example, in the former rod 1 and the former rod 2, the former rod 2
, And the floating out guide G2 is inserted in advance from the tip of the rod, and the former rod 2 is inserted into the former rod 1 so that the coupler 5
May be attached to the original pole 1.

Hereinafter, the former rod 2, the ear rod 3, and the ear rod 3
Also in the tip rod 4, it is assembled and integrated in a similar manner. Note that this is one embodiment, and other assembling methods (for example, a method of inserting the front rod front 2 into the main rod 1, attaching the coupling tool 5, and then attaching the floating out guide G2 to the front rod 2) It goes without saying that it may be.

[Second Embodiment] FIG. 5 is a view showing a coupler 6 according to a second embodiment of the present invention.
(A) is a partial sectional front view, (B) is a left side view, and (C) is a right side view. FIG. 6 is a partial cross-sectional view showing a joint between the former rod 2 and the ear rod 3. Fastener 6
As in the first embodiment, the tapered hollow portion 62 is pressed against the outer periphery of the tapered bottom of the small-diameter rod pipe, as in the first embodiment.
And a base portion 61 which is screwed to the outer periphery of the rod tip of the large diameter rod tube which is larger in diameter than the hollow portion and integrated.

The coupling 6 is interposed between the outer periphery of the rod end of the small-diameter rod and the inner periphery of the tip of the large-diameter rod. By removing the coupling 6, the small-diameter rod can be connected to the large-diameter rod. Can be easily separated from each other, and the separated rod pipes can be easily assembled, and cleaning for maintenance of the rod, the out guide, and the coupling 6 can be reliably performed. This is the same as the first embodiment.

The feature of the second embodiment is that the base 6
The first outer diameter is formed in a convex curved surface so as to have a function of a contact ring (so-called annular guide) for the fishing line W. Such a coupling 6 is a coupling 6 for a rod pipe.
This prevents the fishing line W passing between the floating out guides disposed before and after the portion where the is attached, from coming into direct contact with the surface of the rod pipe. That is, it is possible to prevent the fishing line from adhering due to the surface tension of the rod surface containing water and increasing the resistance during casting and winding. Accordingly, the fishing line W can be smoothly led out, and the friction of the fishing line W is small if the coupling member 6 is made of a material having low friction.

[Third Embodiment] FIG. 7 is a view showing a coupler 7 according to a third embodiment of the present invention.
(A) is a partial sectional front view, (B) is a left side view, and (C) is a right side view. FIG. 8 is a partial cross-sectional view showing a connecting portion between the ear rod 3 and the head rod 4.

The structure of the joint 7 is almost the same as that of the first embodiment described above, and when the rods are swung out, as shown in FIG. Pole 4)
Between the outer circumference of the rod end and the inner circumference of the tip of the large-diameter rod pipe (homo rod 3), and press-contacts and joins the outer circumference of the rod tail of the small-diameter rod pipe. Also, when cleaning the rods, out guides, couplings, etc., or when repairing or replacing the guides, the couplings 7 are removed so that the small-diameter rod pipe (head rod 4) can easily be replaced with the large-diameter rod pipe (homo rod 3). ) Can be withdrawn and separated.

The feature of the third embodiment is that the coupling 7
Has a function of a guide ring for the fishing line W. For this purpose, the base 71 of the coupler 7 extends vertically and has a guide ring 73 with low friction.
Since the fishing line W is directly guided by the guide ring 73, it functions as a mouth guide.

That is, the guide ring 7 of the coupling tool 7
3 is the same function as the function of the lip guide which is externally attached and fixed to the tip of each rod tube (for example, the ear rod, the former rod, the former rod) of a general drawing rod except the tip rod. effective. Therefore, the fishing line W can be smoothly led out at the time of casting or winding.

Although the present invention has been described above, the present invention is not limited only to the embodiment, and it goes without saying that various other modifications can be made without departing from the essence of the present invention.

For example, the couplings in the first, second, and third embodiments include a former rod and a former rod, a former rod and a front rod,
Although the description has been given by taking as an example the coupling tool between the ear rod and the head rod, it is needless to say that the invention can be applied between any rod pipes.

Further, for example, the couplings in the first, second, and third embodiments are detachably screwed and attached to the respective rod pipes. For example, the engagement method is not necessarily limited to the screwing, but may be an engagement method other than the screwing, or a combination thereof.

For example, besides the screw connection, a bayonet connection or the like can of course be employed, and a plurality of types of connection tools can be used in the same fishing rod. Further, for example, a structure in which the fitting is press-fitted into the rod tube by the base portion and the hollow portion as long as it can be removed is sufficient.

[0049]

As described above, according to the present invention, the use of a unique coupler allows the multi-stage swing rod to be easily separated, so that each rod pipe,
Maintenance for cleaning the out guide and the coupling tool can be reliably performed. Further, even if the floating out guide breaks down, it can be easily replaced or repaired. Further, even after the separation, each rod tube can be easily assembled to form one swing rod.

When the base of the coupling has a function of a contact ring, it is possible to prevent the fishing line from adhering (sticking) to the surface of the rod tube due to surface tension. In addition, when the base of the coupling tool has a function of a guide ring, it can serve as a normal mouth out guide.

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an external view showing the whole of a swing out guide rod provided with a coupler of the present invention, in particular, four swing rods.

FIG. 2 is an enlarged view of a main part showing a connecting portion of a rod pipe in FIG. 1;

FIGS. 3A and 3B are views showing a coupler according to the first embodiment of the present invention, wherein FIG.
(B) is a left side view, and (C) is a right side view.

FIG. 4 is a diagram illustrating a state in which a small-diameter rod pipe is pulled out from a large-diameter rod pipe.

FIG. 5 is a view showing a coupler according to a second embodiment of the present invention, wherein (A) is a partially sectional front view,
(B) is a left side view, and (C) is a right side view.

FIG. 6 is a partial cross-sectional view showing a connecting portion between a front rod and an ear rod.

FIG. 7 is a view showing a coupler according to a third embodiment of the present invention, where (A) is a partially sectional front view,
(B) is a left side view, and (C) is a right side view.

FIG. 8 is a partial cross-sectional view showing a portion where the ear rod and the head rod are joined.

[Explanation of symbols]

 A: swing rod 1 ... original rod 1A ... female screw part 2 ... before the original rod 2A ... female screw part 3 ... hot rod 3A ... female screw part 4 ... head rod 5 ... coupling tool 51 ... base 51A ... male screw part 51B ... Grip part 52 ... Hollow part 6 ... Connector 61 ... Base 61A ... Male screw part 62 ... Hollow part 7 ... Coupler 71 ... Base 71A ... Male screw part 72 ... Hollow part 73 ... Guide ring G ... Out guide G1 ... Top Guide G2: Unmoving out guide W: Fishing line

Claims (11)

[Claims] 1. A swinging out guide rod, wherein a sticking pipe at the tip of the stick can be pulled out and separated from a tip of the stick pipe at the base of the stick. 2. A swinging out guide rod in which a small-diameter rod pipe on the rod tip side can be pulled out and separated from a rod tip of a large-diameter rod pipe on the rod base side, wherein the outer periphery of the small-diameter rod pipe has a large diameter. A small-diameter rod pipe can be pulled out from a large-diameter rod pipe by detaching the coupling tool between the large-diameter rod pipe and an inner periphery of a rod tip inner circumference of the diameter rod pipe, and the small-diameter rod pipe can be separated. rod. 3. The coupling tool is engaged with a hollow portion which is in pressure contact with a tapered outer periphery of a rod end of a small diameter rod tube and a rod tip outer periphery of a large diameter rod tube which is larger and integrated than the hollow portion. The out-guide rod for swinging-out according to claim 2, further comprising a base that is formed. 4. The out-out guide rod according to claim 3, wherein the base of the coupling tool has a function as a contact ring for the fishing line. 5. The out-guide rod according to claim 3, wherein the base of the coupling tool has a function of a guide line for a fishing line. 6. A swinging out guide rod in which a small-diameter rod pipe on the rod tip side can be pulled out and separated from a rod tip of a large-diameter rod pipe on a rod base side. A coupling tool is interposed between the inner circumference of the rod tip of the diameter rod pipe, and by removing the coupling tool, the small-diameter rod pipe can be pulled out from the large-diameter rod pipe and separated therefrom. A tapered hollow portion that is in pressure contact with the outer periphery of the rod end formed in a tapered shape; and a base that is engaged with the outer periphery of the rod tip of a large-diameter rod tube that is larger in diameter and integrated with the hollow portion. Has a function of a fishing line contact ring. 7. A coupling tool which is interposed between the outer periphery of the rod end of a small-diameter rod tube and the inner periphery of the tip of a large-diameter rod tube so that the two can be separated and is formed in a tapered shape of the small-diameter rod tube. A coupling tool comprising: a hollow portion pressed into contact with the outer periphery of the formed rod bottom; and a base detachable from the outer periphery of the rod tip of the large-diameter rod tube that is larger and integrated than the hollow portion. 8. The coupling device according to claim 7, wherein the base portion of the coupling device has an engaging portion that engages with a rod tip outer periphery of the large diameter rod tube. 9. The coupling device according to claim 8, wherein a guide ring of a fishing line is formed at a base of the coupling device. 10. The coupling according to claim 8, wherein a fishing line contact ring is formed at a base of the coupling. 11. A coupling tool which is interposed between the outer periphery of the rod end of a small-diameter rod tube and the inner periphery of the tip of a large-diameter rod tube so that the two can be separated and is formed in a tapered shape of the small-diameter rod tube. A tapered hollow portion pressed into contact with the outer periphery of the rod end and a base portion engaged with the outer periphery of the rod tip of the large-diameter rod tube which is larger in diameter and integrated with the hollow portion, and the base portion comes in contact with the fishing line. A coupling tool having a ring function.