JP2000270720A - Fishing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight fishing rod which has an improved strength in a joint portion between rod pipes and an excellent deflection balance. SOLUTION: This fishing rod has a joint portion P in which one end of a butt rod pipe (large diameter rod pipe) 4 is joined to one end of a middle rod pipe (small diameter rod pipe) 10 having a smaller diameter than that of the butt rod pipe (large diameter rod pipe). The joint portion P has a contact region W1 in which the inside surface 4a of one end of the butt rod pipe (large diameter rod pipe) 4 is partially brought into contact with the outside surface 10a of one end of the middle rod pipe (small diameter rod pipe) 10, and a non- contact region W2 in which the inside surface 4a of one end of the butt rod pipe (large diameter rod pipe) 4 is partially not brought into contact with the outside surface 10a of one end of the middle rod pipe (small diameter rod pipe) 10. A dent 16 having a prescribed space D is formed between the inside surface 4a of one end of the butt rod pipe (large diameter rod pipe) 4 and the outside surface 10a of one end of the middle rod pipe (small diameter rod pipe) 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing rod (including a parallel rod, a reverse parallel rod, a spigot rod, a swing rod, etc.) which improves the strength of a joint portion between rod pipes and has an excellent bending balance. Except).

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Utility Model Laid-Open No. 3-105276, a fishing rod (joint rod) usually has an inner circumferential surface of a large-diameter rod pipe having a straight shape and a straight shape. By fitting the outer peripheral surface of the small diameter rod pipe to be formed, the rod pipes are joined to each other.

[0003]

However, in the above-described joining method, when a bending stress (load) acts on a joint portion where the rod pipes are joined together, the end (joint portion) of the small-diameter rod pipe. The stress concentrates on the end positioned at the end of the small diameter rod, and the end of the small diameter rod is greatly elastically deformed due to the stress concentration. Part)
Alternatively, there is a problem that the vicinity thereof is broken or the small-diameter rod tube itself is broken. In particular, recently, since the weight of the fishing rod has been pushed to the utmost, the thickness of the rod tube has also been reduced, so that the above-described problem tends to occur.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a lightweight fishing rod which improves the strength of a joint portion between rod pipes and has an excellent bending balance. It is in.

[0005]

In order to achieve this object, the present invention relates to a joint for joining one end of a large-diameter rod pipe to one end of a small-diameter rod pipe smaller than the large-diameter rod pipe. A fishing rod having a portion, in the joint portion, a contact area where the inner surface of one end of the large-diameter rod tube and the outer surface of one end of the small-diameter rod tube partially contact, A non-contact area in which the inner surface of the one end and the outer surface of the one end of the small-diameter rod are partially non-contact is formed, and the inner surface of the large-diameter rod positioned in the non-contact area and the small diameter A predetermined amount of gap is formed between the rod tube and the outer surface.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a fishing rod according to a first embodiment of the present invention will be described with reference to FIGS.

As shown in FIG. 1, a fishing rod (joint rod) includes a former rod tube 4 having a grip portion 2 formed thereon, a head rod tube 6, and a part between the former rod tube 4 and the head rod tube 6. A plurality of (two in the present embodiment) middle rod pipes 8 and 10 are arranged. These rod pipes 4, 6, 8, and 10 are each formed of a fiber-reinforced synthetic resin, and can be joined to each other via a joint portion P. Note that a tail plug 12 is attached to the base end of the original rod tube 4. Also,
A fishing line binding portion 14 is rotatably attached to the tip of the tip rod tube 6, and by tying the end of a fishing line (not shown) to the fishing line binding portion 14, the tip of the fishing line at the time of actual fishing is obtained. Thread entanglement with the rod tube 6 and the like can be prevented.

Hereinafter, the joint portion P will be described. Since the joint portions P of the respective rod pipes have the same configuration, in the following description, as an example, the former rod tube 4 is used. The structure of the joint portion P for joining the inner rod pipe 10 with the center rod pipe 10 will be described.

FIG. 2 shows one end of an original rod pipe (large diameter rod pipe) 4 and one end of a medium rod pipe (small diameter rod pipe) 10 smaller in diameter than the original rod pipe (large diameter rod pipe) 4. The structure of the joint part P which joins is shown. Specifically, the outer surface 10a of one end of the middle rod tube (small diameter rod tube) 10 is joined to the inner surface 4a of one end of the original rod tube (large diameter rod tube) 4 at the joint portion P. The original rod pipe (large diameter rod pipe) 4 and the medium rod pipe (small diameter rod pipe) 10
And can be detachably joined to each other.

In a state where the original rod pipe (large-diameter rod pipe) 4 and the middle rod pipe (small-diameter rod pipe) 10 are detachably joined together, a joint rod P has an original rod pipe (large-diameter rod pipe). Inner surface 4 at one end of 4
a and a contact area W1 where an outer surface 10a of one end of the middle rod pipe (small diameter rod pipe) 10 partially contacts, an inner surface 4a of one end of the original rod pipe (large diameter rod pipe) 4 and a middle rod. Pipe (small diameter rod pipe) 10
A non-contact area W2 in which the outer surface 10a of the one end portion is partially non-contact is formed, and the inner side face 4a of the original rod pipe (large-diameter rod pipe) 4 positioned in the non-contact area W2 and the middle rod A predetermined clearance D between the outer surface 10a of the pipe (small diameter rod pipe) 10
Is formed.

The recess 16 is formed by forming the inner side surface 4a of the original rod tube (large diameter rod tube) 4 facing the front end 101 at one end of the middle rod tube (small diameter rod tube) 10 into a relatively large diameter. , A predetermined gap amount D is formed between the front end 101 and the inner side surface 4a. In this case, the gap amount D is determined when a fish of an average size is caught (for example, 5 to a fishing rod of 300 to 500 g).
It is preferable that the tip of the middle rod pipe (small-diameter rod pipe) 10 be designed so that the leading end 101 of the one end of the rod 10 does not contact the recess 16. Specifically, the gap amount D is
0.03 to 0.3 mm, preferably 0.05 to 0.2
mm. Further, in the above-described joint type fishing rod, since the total length L of the joint portion P is likely to vary according to the joining force of the angler, even if such a variation occurs, the middle rod is securely placed within the range of the concave portion 16. Pipe (small diameter rod pipe) 10
The concave portion 16 has a length dimension M of 10 mm or more, preferably 20 mm, such that the tip 101 at one end of the concave portion 16 is positioned.
It is preferable to set it to 30 mm.

Further, it is preferable to attach a plug 18 which also serves as a reinforcement of the foremost end 101 to the foremost end 101 at one end of the middle rod (small-diameter rod) 10 by, for example, an adhesive.

According to such a configuration, the joint portion P includes:
Since a bending stress (load) corresponding to the bending state of the fishing rod can be applied, stress concentrates at one end of the middle rod pipe (small diameter rod pipe) 10, and the concentration of the stress causes the middle rod pipe (small diameter pipe) to concentrate. When one end of the rod pipe 10 is greatly elastically deformed, one end of the original rod pipe (large-diameter rod pipe) 4 or its vicinity is damaged, or the middle rod pipe (small-diameter rod pipe) 10 itself is damaged. This can be prevented.

Specifically, in the contact area W1 of the joint portion P, one end of the original rod pipe (large-diameter rod pipe) 4 and one end of the middle rod pipe (small-diameter rod pipe) 10 come into surface contact with each other. It is joined in the state where it was done. Therefore, even if the joint portion P is bent, it is possible to prevent a strong stress from acting on one end of the middle rod tube (small diameter rod tube) 10 in the initial stage of bending (relatively small bending state). . Furthermore, in a state where the joint portion P is relatively largely bent, the leading end 1 of the one end of the middle rod pipe (small diameter rod pipe) 10
01 enters the recess 16 and makes contact therewith, and the joint P
In one contact area W1, one end of the original rod pipe (large-diameter rod pipe) 4 and one end of the middle rod pipe (small-diameter rod pipe) 10 are in surface contact with each other. Therefore, one end of the original rod pipe (large-diameter rod pipe) 4 and one end of the middle rod pipe (small-diameter rod pipe) 10 are secured over the entire length L of the joint portion P. As a result, it is possible to maintain the bending balance while improving the strength of the joint portion P.

Further, when the joint portion P bends, each end is chamfered so that stress is not concentrated on the original rod pipe (large diameter rod pipe) 4 and the medium rod pipe (small diameter rod pipe) 10. Is preferred.
As the chamfered portion, for example, the most distal end R1 at one end of the original rod pipe (large diameter rod pipe) 4, both sides R2 and R3 of the concave portion 16, and the one end of the middle rod pipe (small diameter rod pipe) 10 are used. Tip 101
And the outer surface R5 of the adhesive layer of the plug 18 correspond to the peripheral portion R4. By chamfering in this way, it is possible to prevent local stress concentration on the original rod pipe (large diameter rod pipe) 4 and the medium rod pipe (small diameter rod pipe) 10 when the joint portion P is bent. it can.

Further, in order to reinforce the joint portion P, for example, at least the outer peripheral surface of one end of the original rod pipe (large-diameter rod pipe) 4
It is preferable to form the reinforcing layer 20. In this case, the reinforcing layer 20 can be integrally formed of the same material (fiber-reinforced synthetic resin) as the original rod pipe (large-diameter rod pipe) 4.

The total length L of the joint P can be increased or decreased according to the size (size, weight) of the fishing rod. For example, when the fishing rod becomes large, a large load is applied to the joint P. In the case of hanging, the total length L of the joint portion P (specifically,
The contact area W1) is relatively large, and when the fishing rod is small and a small load is applied to the joint P, the entire length L of the joint P (specifically, the contact area W1) ) Should be relatively small.

Also, for example, a middle rod pipe (small diameter rod pipe) is used so that the original rod pipe (large diameter rod pipe) 4 and the middle rod pipe (small diameter rod pipe) 10 can be joined smoothly and smoothly. It is preferable that the outer surface 10a of one end of the taper 10 be tapered in a tapered shape. In this case, the taper angle can be set arbitrarily according to the size (size) of the fishing rod.

According to the above-described embodiment, it is possible to improve the strength of the joint portion P between the rod tubes 4, 6, 8, and 10, and to provide a lightweight fishing rod excellent in bending balance. Becomes

In the above embodiment, the hollow rods 4, 6, 8, and 10 are used. However, they may be all solid and only the joint P may be hollow. Although the reinforcing layer 20 is formed on the outer peripheral surface of one end of the original rod pipe (large-diameter rod pipe) 4, the reinforcing layer 20 may be disposed on the inner layer, the middle layer, or the inner and outer layers of the large-diameter rod pipe. good. In this case, the reinforcing layer 2
As 0, other than the method of integrally molding the fiber-reinforced synthetic resin together with the large-diameter rod pipe, for example, a metal ceramic or the like may be formed in a ring shape (tubular) and fitted to the large-diameter rod pipe.

Next, a fishing rod according to a second embodiment of the present invention will be described with reference to FIG. In the description of the present embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 3, in the fishing rod of the present embodiment, at least one end of the joint portion P and the outer surface 10a of one end of the middle rod tube (small diameter rod tube) 10 are opposed. In the part (the inner surface 4a at one end of the original rod pipe (large diameter rod pipe) 4)
A flexible member 22 having a predetermined thickness is provided.

In the present embodiment, as an example, flexible members 22 are provided at both ends of the joint portion P. Specifically, the recess 16 applied to the first embodiment described above
A flexible member 22 is provided therein, and a concave portion 24 is formed in the inner side surface 4a at one end of the original rod tube (large-diameter rod tube) 4. The flexible member 22 is provided in the concave portion 24.

In this case, the length dimension N of the concave portion 24 is 5 to 5.
It is preferable to set it to 15 mm, and it is preferable to perform the same chamfering R1 as in the first embodiment on the end surface of the flexible member 22 in the concave portion 24. Further, the ratio of the length of the flexible member 22 (the total length of the concave portions 16 and 24 in which the flexible member 22 is disposed) to the total length L of the joint portion P is 50.
%, Preferably 30% or 25%. Further, as the flexible member 22, it is preferable to use a material (for example, rubber, elastomer resin, or the like) softer than the rod tube.

The other configuration is the same as that of the first embodiment, and the description is omitted.

According to such a configuration, since the flexible members 22 are provided at both ends of the joint portion P, the original rod tube (large-diameter rod tube) 4 and the middle rod Both ends of one end of the pipe (small-diameter rod pipe) 10 are elastically supported by the flexible member 22, and the other parts are supported in surface contact with each other. As a result, it is possible to further improve the deflection balance.

In this embodiment, a concave portion 24 is formed on the inner side surface 4a at one end of the original rod tube (large-diameter rod tube) 4, and the flexible member 22 is provided in the concave portion 24. Instead of providing the flexible member 22, for example, a similar effect can be obtained by disposing a reinforcing layer made of the same material as the rod tube.

The other effects are the same as those of the first embodiment, and the description is omitted.

Next, a fishing rod according to a third embodiment of the present invention will be described with reference to FIG. In the description of the present embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 4, the fishing rod according to the present embodiment has an inner side surface 4a at one end of an original rod tube (large-diameter rod tube) 4 and a middle rod on both sides of a contact area W1 of a joint portion P. The inner surface of the original rod pipe (large-diameter rod pipe) 4 partially contacts the outer surface 10a at one end of the pipe (small-diameter rod pipe) 10 in the non-contact area W2 of the joint portion P. 4a and medium rod pipe (small diameter rod pipe) 1
0 so that a gap D1 of 0.3 mm or more, preferably 0.5 to 2.0 mm, is formed between the inner surface 4a of the original rod tube (large-diameter rod tube) 4 and the middle rod tube. (Small diameter pipe)
Each of the outer surfaces 10a is tapered in a tapered shape. If the gap D1 is 0.1 mm or less, abnormal noise and squeal will occur when the fishing rod is gripped strongly. However, by setting the gap D1 to the dimensions described above, even when the fishing rod is gripped strongly. It is possible to prevent generation of abnormal noise and squeal.

More specifically, the outer surface 10a of the middle rod pipe (small diameter rod pipe) 10 is tapered in a tapered shape over the entire length L of the joint P.
The inner side surface 4a of the original rod pipe (large diameter rod pipe) 4 is tapered in a tapered shape only over the contact area W1, and the non-contact area W2 has a straight shape. More specifically, in the contact region W1, the tapered shape of the inner surface 4a of the original rod pipe (large-diameter rod pipe) 4 and the middle rod pipe (small-diameter rod pipe)
10 has a shape which is relatively different from the tapered shape of the outer surface 10a, and these two surfaces 4a, 10a
In the meantime, a slight gap is formed and the contact area W1 is formed so as to partially and firmly contact on both sides of the contact area W1. The position of the contact point between the two surfaces 4a and 10a is W
It is preferable to set the ratio of 1 / L to satisfy 30 to 90%. Further, in the contact region W1, the step K of the tapered taper shape of the both surfaces 4a and 10a is:
0.05-0.5 mm, preferably 0.1-0.3 m
m, more preferably 0.2 mm.

In this case, the contact area W1 and the non-contact area W2
Is preferably set so as to satisfy the relationship of 0.5 × W1 ≦ W2 ≦ W1.

By setting such a relationship,
A bending stress (load) corresponding to the bent state of the fishing rod can be applied to the joint portion P. That is, the contact portion between the outer surface 10a of the middle rod tube (small diameter rod tube) 10 and the inner surface 4a of the original rod tube (large diameter rod tube) 4 located in the non-contact area W2 changes according to the magnitude of the stress. Go. That is, when there is no stress (when there is no load), the outer side surface 10a of the middle rod pipe (small diameter rod pipe) 10 located in the non-contact area W2 and the original rod pipe (large diameter rod pipe).
4 does not come into contact with the inner surface 4a, and stress (load)
, The contact area gradually increases. As a result, the bending balance of the fishing rod can be improved, and stress concentrates on one end of the middle rod pipe (small diameter rod pipe) 10, and the original rod pipe (large diameter rod pipe) 4 at this position is damaged. Can be prevented.

Further, the outer surface 10a at one end of the middle rod tube (small diameter rod tube) 10 is tapered and the inner surface 4a at one end of the original rod tube (large diameter rod tube) 4 in the contact area W1. The taper shape of the
10 can be easily joined together.

In this embodiment, the contact area W1
In the above, a slight gap is formed between the inner surface 4a of the original rod tube (large diameter rod tube) 4 and the outer surface 10a of the middle rod tube (small diameter rod tube) 10, and both sides of the contact area W1 are partially separated. However, the present invention is not limited to this. The inner surface 4a of the original rod tube (large-diameter rod tube) 4 and the outer surface 10a of the middle rod tube (small-diameter rod tube) 10 are not limited thereto. The same effect can be obtained even if the tapered taper shapes are made to coincide with each other.

In this embodiment, solid rod pipes 4, 6, 8, and 10 are assumed in the drawings, but they may be all hollow.

In this embodiment, the inner surface 4a of the original rod tube (large-diameter rod tube) 4 and the outer surface 10a of the middle rod tube (small-diameter rod tube) 10 have two-point contact on both sides of the contact area W1. Although the description has been given of the case where the contact is performed, three-point contact or more contact states may be employed.

In this embodiment, the reinforcing layer 2
0 is formed so as to terminate within the range of the non-contact region W2 in the drawing, but is not limited thereto, and may extend beyond the range of the non-contact region W2. Further, the reinforcing layer 20 is not limited to the outer layer, and may be formed of an inner layer, a middle layer, or a combination thereof.

Next, a fishing rod according to a fourth embodiment of the present invention will be described with reference to FIG. In the description of the present embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 5, the fishing rod according to the present embodiment relates to a modification of the above-described third embodiment, and includes an original rod pipe (large-diameter rod pipe) 4 over the entire joint portion P. The inner side surface 4a has a straight shape, and the outer surface 10 at one end of the middle rod pipe (small diameter rod pipe) 10 in the contact area W1 of the joint portion P.
a has a straight shape, contacts the inner side surface 4a of the original rod pipe (large-diameter rod pipe) 4, and the non-contact area W2 of the joint portion P.
A gap D1 of 0.3 mm or more, preferably 0.5 to 2.0 mm, between the inner surface 4a of the original rod tube (large-diameter rod tube) 4 and the outer surface 10a of the middle rod tube (small-diameter rod tube) 10. Is formed, the outer side surface 10a of the middle rod pipe (small diameter rod pipe) 10 is reduced in diameter.

The other configuration is the same as that of the third embodiment described above, and the description is omitted.

According to such a configuration, since a bending stress (load) corresponding to the bending state of the fishing rod can be applied to the joint portion P, the bending balance of the fishing rod can be improved and The stress concentrates on one end of the middle rod pipe (small diameter pipe) 10 and the original rod pipe (large diameter rod pipe) at this position
4 can be prevented from being damaged.

In this embodiment, the shapes of the inner surface 4a of the original rod tube (large-diameter rod tube) 4 and the outer surface 10a of the middle rod tube (small-diameter rod tube) 10 in the contact area W1 are described above. A tapered shape similar to that of the embodiment may be used.

In this embodiment, solid rod pipes 4, 6, 8, and 10 are assumed in the drawings, but they may be all hollow.

If necessary, a reinforcing layer as shown in FIGS. 2 to 4 may be provided.

Further, the outer diameter (maximum outer diameter) of the part a of the middle rod pipe (small diameter rod pipe) 10 is determined by the inner diameter b at the end of the original rod pipe (large diameter rod pipe) 4 and the outer diameter thickness (2t). Is preferably set to about 1/2 of the value obtained by adding. That is, by setting b + t ≦ a ≦ b + 2t, the bending balance of the fishing rod can be easily improved.

Each of the above-described embodiments (FIGS. 2 to 5)
), It is preferable that the position of the contact region W1 where the small-diameter rod tube comes into hard (strong) contact is formed by exposing the fiber on the inner surface of the large-diameter rod tube so that the reinforcing fiber directly contacts the small-diameter rod tube. By exposing the fibers in this manner, the rod pipes can be firmly fixed to each other, so that they can be prevented from coming off. Furthermore, even if the length L of the joint portion P is short, the bending of the fishing rod can be prevented. It is preferable that the exposed fiber is made of a material such as an organic fiber or an inorganic fiber having a higher friction coefficient than the carbon fiber of the rod body.

[0048]

According to the present invention, it is possible to improve the strength of the joint portion between the rod pipes and to provide a lightweight fishing rod excellent in bending balance.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a fishing rod according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a configuration of a joint portion of the fishing rod according to the first embodiment of the present invention.

FIG. 3 is a sectional view showing a configuration of a joint portion of a fishing rod according to a second embodiment of the present invention.

FIG. 4 is a sectional view showing a configuration of a joint portion of a fishing rod according to a third embodiment of the present invention.

FIG. 5 is a sectional view showing a configuration of a joint of a fishing rod according to a fourth embodiment of the present invention.

[Explanation of symbols]

 4 Original rod pipe (Large-diameter rod pipe) 4a Inner surface 10 Medium rod pipe (Small-diameter rod pipe) 10a Outer surface 16 Concave part D Clearance amount W1 Contact area W2 Non-contact area

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yutaka Kurano 3-14-16 Maesawa, Higashikurume-shi, Tokyo Daiwa Seiko Co., Ltd. F-term (reference) 2B019 AA10 AB03 AB32 AB33

Claims (4)

[Claims] 1. A fishing rod having a joining portion for joining one end of a large-diameter rod tube and one end of a small-diameter rod tube smaller in diameter than the large-diameter rod tube, wherein the joining portion includes a large-diameter rod. A contact area where the inner surface of one end of the rod tube and the outer surface of one end of the small diameter rod tube partially contact, the inner surface of one end of the large diameter rod tube, and the outer surface of one end of the small diameter rod tube. A non-contact area is configured to be partially non-contact, and a predetermined amount of gap is formed between the inner surface of the large-diameter rod pipe and the outer surface of the small-diameter rod pipe positioned in the non-contact area. A fishing rod characterized by being formed. 2. A flexible member having a predetermined thickness is provided on at least one end side of the joint portion and on a portion facing an outer surface of one end portion of the small diameter rod pipe. The fishing rod according to claim 1. 3. On both sides of the contact area of the joint,
The inner surface of one end of the large-diameter rod tube and the outer surface of one end of the small-diameter rod tube are partially firmly in contact with each other, and, in the non-contact region of the joint portion, the inner surface of the large-diameter rod tube. The fishing rod according to claim 1, wherein a gap of 0.3 mm or more is formed between the small-diameter rod pipe and the outer surface. 4. In the joint portion, the contact area is W1,
Assuming that the non-contact area is W2, 0.5 × W1 ≦ W2 ≦ W1
The fishing rod according to claim 1, wherein the following relationship is satisfied.