JP3979946B2

JP3979946B2 - fishing rod

Info

Publication number: JP3979946B2
Application number: JP2003024178A
Authority: JP
Inventors: 寿久岡本; 太西川
Original assignee: ダイワ精工株式会社
Priority date: 2003-01-31
Filing date: 2003-01-31
Publication date: 2007-09-19
Anticipated expiration: 2023-01-31
Also published as: JP2004229589A

Description

【０００１】
【発明の属する技術分野】
本発明は、釣竿に関し、特に、細径竿管を収容する大径竿管を備え、この大径竿管が、一端側に形成した小径内孔部と他端側に形成した大径内孔部との間の中間部に、内面側に突出する勾配変換部を形成した釣竿に関する。
【０００２】
【従来の技術】
一般に、強化繊維に合成樹脂を含浸させたプリプレグを巻回することで形成した竿管には、中間部から拡径させて竿尻側に大径の握り部を形成した釣竿がある（例えば特許文献１参照）。この釣竿では、管径の変化率の大きな部位で本体プリプレグの合成樹脂含浸量を少なくすることで、加熱成形時の樹脂流動を抑制し、強度低下の防止と軽量化とを図る。
【０００３】
また、緩いテーパで形成された竿管部の後部に、急テーパ部による大径部を形成し、この大径部に竿尻キャップを螺合した釣竿がある（例えば特許文献２参照）。この釣竿は、竿管部と急テーパ部とのそれぞれの長さとテーパとを所定の大きさに設定することにより、内部に収容した中竿の後端と竿尻キャップとの接触を防止する。
【０００４】
【特許文献１】
特開平９−１８２５４７号公報
【０００５】
【特許文献２】
実開平４−９４９６７号公報
【０００６】
【発明が解決しようとする課題】
しかし、従来の釣竿は、管径の変化率の大きな部位が竿管の内部に角部を形成するため、これよりも細径の竿管を収納したときに、この角部に接触して竿管の外面が傷付く虞がある。特に、釣竿の細径化および軽量化を追及した釣竿の場合には、元竿の外径も細く、このため竿尻側の握り部あるいは尻栓キャップを螺合する大径部を握り易い大きさに形成する場合には、このような角部により、内部に収容した竿管がより傷付き易くなる。
【０００７】
本発明は、このような事情に基づいてなされたもので、大径竿管内に小径竿管を収納したときに、この小径竿管の外面に傷が付くのを防止する釣竿を提供することを目的とする。
【０００８】
【課題を解決するための手段】
上記目的を達成するため、本発明によると、細径竿管を収納する大径竿管を備え、この大径竿管が、一端側に形成した小径内孔部と他端側に形成した大径内孔部との間の中間部に、内面側に突出する勾配変換部を形成した釣竿であって、前記勾配変換部は最内層に柔軟部材を有する釣竿が提供される。
【０００９】
【発明の実施の形態】
図１から図４は本発明の好ましい実施形態による釣竿の大径竿管を示す。
本実施形態の大径竿管は、これよりも細径の竿管８を収納可能な振出し式釣竿（図２参照）の元竿管１０として形成してあり、この竿管８を振り出した状態では、基端部８Ａの補強されかつ膨出形成された嵌合部が、元竿管１０の先端部の内周に摩擦係合する。更に、この中竿管８内にも、これよりも細径の図示しない竿管が順に収納され、振り出したときに長尺の釣竿を形成する。
【００１０】
このような大径の元竿管１０は、強化繊維に合成樹脂を含浸した繊維強化プリプレグ（以下、単にプリプレグと称する）を芯金に巻回して形成した本体層１１を備える。このようなプリプレグは、強化繊維として例えばカーボン繊維あるいはガラス繊維等を用いるのが好ましく、強化繊維に含浸する樹脂としては、例えばエポキシ樹脂、ポリエステル樹脂、フェノール樹脂等の熱硬化性樹脂が好ましく、ポリアミド等の熱可塑性樹脂を混在させてもよい。通常は、このようなプリプレグを硬化して形成した本体層１１は、日本工業規格に規定する鉛筆硬度で約８Ｈ程度の硬さに形成される。
【００１１】
本実施形態の元竿管１０は、例えば１０〜２０ｍｍの径である小径内孔部を形成する先端側部位１２から、急傾斜部1４を介して、例えば２３〜２５ｍｍの径である大径内孔部を形成する後端側部位１６に滑らかに移行させ、一般的には大きさが定められている尻栓６に対応した竿径に形成してある。このような急傾斜部１４を元竿管１０の中間部に設けることにより、例えば鮎竿のように細径化・軽量化が望まれている釣竿の竿尻を大径化し、握持性を良好にすると共に、規格寸法の尻栓６を採用することができる。なお、大径部１６は好適な握持性を形成するものであれば適宜の勾配に形成することが可能であり、通常は、２０／１０００〜５０／１０００程度に形成される。
【００１２】
図１に示すように、例えば０．３／１０００〜２／１０００程度の勾配の小さな先端側部位１２から例えば１０／１０００〜１００／１０００程度の急勾配を形成する急傾斜部１４に変化する勾配変換部Ｔが、この元竿管１０の内面側に突出し、角部を形成する。この勾配変換部Ｔが元竿管１０の例えば約１３５０ｍｍの全長Ｌに対して、先端から（３／４）Ｌの位置よりも先端側に位置する場合、この勾配変換部Ｔが内部に収納した中竿管８の外面を傷付ける可能性が大きい。
【００１３】
これは、元竿管１０内で、これに収容された中竿管８が移動し、そのときに中竿管８の外面が勾配変換部Ｔから衝撃を受けるためである。このような中竿管８の外面に塗膜が形成されている場合、塗膜の硬度は、鉛筆硬度で約Ｈ−２Ｈ程度であるため、元竿管１０の本体層１１よりも柔らかい。特に、軽量化等を図るために最外層の塗膜が薄い場合には、傷が塗膜を貫通して中竿管８の本体まで達する可能性もある。また、鉛筆硬度で８Ｈ程度に表面を化学研磨された無塗装の中竿管８の場合であっても、鋭い角部を形成する勾配変換部Ｔとの衝突あるいは摩擦で傷が発生する可能性がある。
【００１４】
なお、この勾配変換部Ｔが先端から（３／４）Ｌの位置よりも後端側に位置する場合には、元竿管内での中竿管のがたつきが少なく、がたついた場合であっても、膨出形成された基端部８Ａが支えとなって中竿管８の外面に傷が付く可能性は小さい。また、急傾斜部１４の勾配が１０／１０００よりも小さい場合は、内面に形成する角部は鋭くないため、例え勾配変換部Ｔが先端から（３／４）Ｌの位置よりも先端側に位置する場合でも、中竿管８の外面を傷付ける可能性は小さい。
【００１５】
本実施形態では、中竿管８の外面を傷付ける可能性の高い角部を形成する勾配変換部Ｔの最内層に、柔軟部材１６を配置し、元竿管１０の本体層１１と中竿管８とがこの勾配変換部Ｔで直接接触するのを防止している。この柔軟部材１６は、上述のように中竿管８の塗膜よりも硬度を低く形成することにより、表面に塗膜を形成した中竿管８に限らず、表面を化学研磨された無塗装の中竿管に傷をつけることもない。
【００１６】
このような柔軟部材１６は、元竿管１０の本体層１１を形成するプリプレグを図示しない芯金に巻回する前に、上述の勾配変換部Ｔを跨ぐ部位に、１０００〜５０００ｋｇ／ｍｍ^２程度の曲げ弾性率を有する柔軟シートを芯金に直接巻回し、この上に本体層１１を形成する種々のプリプレグを巻回する。この本体層１１を形成するプリプレグは、通常と同様に、繊維方向を軸方向、周方向あるいは傾斜方向に引き揃えた状態で適宜数巻回する。
【００１７】
このような柔軟部材１６は、単独で芯金に巻回する他、本体層１１を形成するプリプレグに重ねた状態で、本体層１１を形成するプリプレグと共に巻回してもよい。いずれの場合も、柔軟部材１６を形成する柔軟シートは、一端が幅５〜５０ｍｍ、これに対向する他端が幅５〜２０ｍｍ、長さは少なくとも１回以上巻回可能な寸法に形成した台形状に形成しておくのが好ましい。また、柔軟シートの厚さは、０．０１〜０．２ｍｍ程度で、特に０．０１〜０．１ｍｍ程度であるのが好ましい。これよりも厚く形成した場合には、強度低下の要因となる皺が本体層１１に形成される可能性が高くなる。
【００１８】
そして、実際に巻回する場合には、幅広側の端部から芯金上に巻きつけることにより、元竿管１０の内面に段差部を形成することなく、容易に巻回することができる。柔軟シートを上述の寸法に形成することにより、元竿管１０の内面には、勾配変換部Ｔを挟んで５〜５０ｍｍの軸方向寸法を有する柔軟部材１６がその全周にわたって形成される。
【００１９】
なお、柔軟部材１６は、上述のような柔軟シートに限らず、内部に収容した中竿管８の外面に傷が付くのを防止できるものであれば、これ以下の弾性率あるいはこれ以下の低硬度を有する合成ゴムあるいは天然ゴム等のゴム材料、塗料等の樹脂材料の他、布、木材等の適宜の材料を用いることも可能である。ゴム材料で形成する場合には、ゴム硬度５０〜９０度程度の値に形成することが好ましい。
【００２０】
更に、元竿管１０の先端部の玉口部Ｂにも、その最内層に柔軟部材１８を配置してある。この柔軟部材１８は、中竿管８の基端部８Ａの合わせ部の長さよりも短くし、中竿管８を振出したときに、この中竿管８と元竿管１０との確実な継合状態を維持することが好ましい。この柔軟部材１８の長さは、１０〜３５ｍｍの範囲で、２５ｍｍ程度に形成することが好ましい。このような柔軟部材１８は、上述の勾配変換部Ｔに配置した柔軟部材１６を形成する柔軟シートと同様な材料から同様な方法で形成することができるが、中竿管８を引き出す際又は収納する際は、比較的大きな衝撃を与えることがあるため、柔軟部材１６と同等か、それよりも硬度を低く形成することが好ましい。
【００２１】
なお、この柔軟部材１８を上述のような柔軟シートで形成する場合には、勾配が小さいため、長方形状の柔軟シートあるいは先縁部が元竿管１０の軸線に直交しかつ後縁部側が傾斜した台形状に形成することが好ましい。また、その長さについても、少なくとも１回以上巻回可能な寸法を有するものであればよいことは上述と同様である。
【００２２】
このように形成した元竿管１０は、勾配変換部Ｔの柔軟部材１６が内部に収容した中竿管８の外面に傷をつけるのを防止し、玉口部Ｂの柔軟部材１８が中竿管８を引出す際および収納する際にその外面に傷を付けるのを防止することにより、釣竿の軽量構造を維持しつつ長期間にわたって中竿管８の表面の損傷を防止することができる。
【００２３】
特に、表面処理を施してない中竿管８の場合、プリプレグの樹脂を安定化するために熱硬化時に巻きつけた緊締テープの螺旋状凹凸が残り、従来では、特に引出す際および収納する際にこの凹凸が勾配変換部Ｔで削られることで生じる損傷が、勾配変換部Ｔに設けた柔軟部材１６によりほぼ確実に防止される。更に、このような凹凸に限らず、表面の塗膜の損傷も防止できるため、特に薄い塗膜が形成されている場合であっても、本体層にまで達するような傷の発生が抑制されるため、中竿管の寿命の延長も可能である。
【００２４】
なお、上述の実施形態では、振出し式釣竿の元竿管１０について説明したが、例えば並継ぎ式の釣竿の場合であっても、内部にこれよりも細径の竿管を収納するものであれば、どのような釣竿にも適用可能である。また、元竿管１０に限らず、例えば２本仕舞と通称されるように、元竿管とこの先に継合される竿管との２本の竿管に交互に細径の竿管を収納する釣竿の場合には、元竿管とこの先に継合される竿管との双方に上述のような柔軟部材１６，１８を設けることができる。この場合、玉口部Ｂの柔軟部材１８は、収納側の竿管の前端部に設けることが好ましい。また、玉口部Ｂの柔軟部材１８を省略することも可能である。
【００２５】
【発明の効果】
以上明らかなように、本発明によると、釣竿の大径竿管内に小径竿管を収納したときに、この小径竿管の外面に傷が付くのを防止することができる。
【図面の簡単な説明】
【図１】本発明の好ましい実施形態による元竿管の断面図。
【図２】図１の元竿管に中竿管を収納した状態の断面図。
【図３】図１の元竿管の勾配変換部の拡大断面図。
【図４】図１の元竿管の玉口部の拡大断面図。
【符号の説明】
１０…元竿管、１１…本体層、１２…先端側部位、１４…急傾斜部、Ｔ…勾配変換部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fishing rod, and in particular, includes a large-diameter rod that accommodates a small-diameter rod, and the large-diameter rod includes a small-diameter inner hole formed on one end and a large-diameter inner hole formed on the other end. The present invention relates to a fishing rod in which a gradient conversion portion protruding toward the inner surface is formed at an intermediate portion between the two portions.
[0002]
[Prior art]
Generally, a rod that is formed by winding a prepreg in which a reinforcing fiber is impregnated with a synthetic resin has a fishing rod in which a diameter is increased from an intermediate portion and a grip portion having a large diameter is formed on the buttock side (for example, a patent) Reference 1). In this fishing rod, by reducing the amount of synthetic resin impregnation of the main body prepreg at a portion where the change rate of the pipe diameter is large, the resin flow at the time of thermoforming is suppressed, and strength reduction and weight reduction are achieved.
[0003]
In addition, there is a fishing rod in which a large-diameter portion by a steep taper portion is formed at the rear portion of the tub tube portion formed with a loose taper, and a heel cap is screwed to the large-diameter portion (see, for example, Patent Document 2). This fishing rod prevents the contact between the rear end of the middle rod housed inside and the buttock cap by setting the length and taper of the rod tube portion and the steep taper portion to a predetermined size.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-182547
[Patent Document 2]
Japanese Utility Model Publication No. 4-94967 [0006]
[Problems to be solved by the invention]
However, in the conventional fishing rod, the portion with a large change rate of the tube diameter forms a corner portion inside the rod tube, so that when the rod tube having a smaller diameter is accommodated, the rod portion comes into contact with the corner portion. The outer surface of the tube may be damaged. In particular, in the case of a fishing rod that has been designed to reduce the diameter and weight of the fishing rod, the outer diameter of the main rod is also thin. Therefore, it is easy to grasp the grip portion on the heel side or the large diameter portion to which the butt plug cap is screwed. In the case where it is formed, such a corner portion makes it easier to damage the soot tube accommodated inside.
[0007]
The present invention has been made based on such circumstances, and provides a fishing rod that prevents the outer surface of the small-diameter rod tube from being damaged when the small-diameter rod tube is accommodated in the large-diameter rod tube. Objective.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a large-diameter soot pipe is provided for accommodating a small-diameter soot pipe. A fishing rod in which a gradient conversion portion protruding toward the inner surface is formed at an intermediate portion between the inner diameter hole portion and the gradient conversion portion is provided with a fishing rod having a flexible member in the innermost layer.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show a fishing rod large-diameter rod according to a preferred embodiment of the present invention.
The large-diameter rod tube of the present embodiment is formed as a main rod tube 10 of a swing-out type fishing rod (see FIG. 2) that can accommodate a rod tube 8 having a smaller diameter than this, and the rod tube 8 is swung out. Then, the reinforced and bulged fitting portion of the base end portion 8A is frictionally engaged with the inner periphery of the distal end portion of the main tube 10. Further, a rod (not shown) having a diameter smaller than that is sequentially stored in the middle rod 8 and forms a long fishing rod when it is swung out.
[0010]
Such a large diameter main pipe 10 includes a main body layer 11 formed by winding a fiber reinforced prepreg (hereinafter simply referred to as a prepreg) in which a reinforced fiber is impregnated with a synthetic resin, around a cored bar. In such a prepreg, for example, carbon fiber or glass fiber is preferably used as the reinforcing fiber, and the resin impregnated in the reinforcing fiber is preferably a thermosetting resin such as an epoxy resin, a polyester resin, or a phenol resin. A thermoplastic resin such as may be mixed. Usually, the main body layer 11 formed by curing such a prepreg is formed to a hardness of about 8H with a pencil hardness specified in Japanese Industrial Standards.
[0011]
For example, the main pipe 10 of the present embodiment has a large inner diameter of, for example, 23 to 25 mm from the distal end portion 12 that forms a small-diameter inner hole having a diameter of, for example, 10 to 20 mm via a steeply inclined portion 14. It smoothly transitions to the rear end side portion 16 that forms the hole, and is generally formed to have a ridge diameter corresponding to the bottom plug 6 having a predetermined size. By providing such a steeply inclined portion 14 in the middle portion of the main rod tube 10, for example, the diameter of the rod bottom of a fishing rod that is desired to be reduced in diameter and weight, such as a rod, is increased, and gripping performance is improved. While making it favorable, the bottom plug 6 of a standard dimension can be employ | adopted. The large-diameter portion 16 can be formed to have an appropriate gradient as long as it has a suitable gripping property, and is usually formed in a range of about 20/1000 to 50/1000.
[0012]
As shown in FIG. 1, the slope changes from a tip side portion 12 having a small slope of about 0.3 / 1000 to 2/1000, for example, to a steep slope portion 14 that forms a steep slope of about 10/1000 to 100/1000, for example. The conversion part T protrudes to the inner surface side of the main porcelain tube 10 to form a corner part. When this gradient conversion part T is located on the front end side with respect to the total length L of the main porcelain tube 10, for example, about 1350 mm, from the position of (3/4) L from the front end, this gradient conversion part T is housed inside. There is a high possibility of damaging the outer surface of the midrib tube 8.
[0013]
This is because the intermediate rod 8 accommodated in the main rod tube 10 moves in the main rod tube 10, and at that time, the outer surface of the medium rod tube 8 receives an impact from the gradient converting portion T. In the case where a coating film is formed on the outer surface of such a middle tube 8, the hardness of the coating film is about H-2H in pencil hardness and is therefore softer than the main body layer 11 of the main tube 10. In particular, when the outermost coating film is thin in order to reduce the weight or the like, there is a possibility that a scratch penetrates the coating film and reaches the main body of the intermediate tube 8. Further, even in the case of the unpainted intermediate tube 8 whose surface is chemically polished to a pencil hardness of about 8H, scratches may occur due to collision or friction with the gradient conversion portion T that forms a sharp corner. There is.
[0014]
In addition, when this gradient conversion part T is located in the back end side rather than the position of (3/4) L from the front-end | tip, there is little shakiness of the middle iron pipe in the main steel pipe, and it rattles Even so, it is unlikely that the outer surface of the intermediate tube 8 will be damaged by the bulging base end 8A. Further, when the gradient of the steeply inclined portion 14 is smaller than 10/1000, since the corner portion formed on the inner surface is not sharp, for example, the gradient converting portion T is closer to the tip side than the position of (3/4) L from the tip. Even if it is located, the possibility of damaging the outer surface of the intermediate tube 8 is small.
[0015]
In the present embodiment, the flexible member 16 is disposed in the innermost layer of the gradient converting portion T that forms a corner portion that is likely to damage the outer surface of the middle tube 8, and the main body layer 11 and the middle tube of the main tube 10 are arranged. 8 is prevented from coming into direct contact with the gradient converting portion T. As described above, the flexible member 16 is not limited to the intermediate tube 8 having a coating film formed on the surface thereof by forming a lower hardness than the coating film of the intermediate tube 8. No damage to the middle duct.
[0016]
Such a flexible member 16 is about 1000 to 5000 kg / mm ² at a portion straddling the above-described gradient converting portion T before the prepreg forming the main body layer 11 of the main steel tube 10 is wound around a core metal (not shown). A flexible sheet having a bending elastic modulus of 5 is directly wound around a cored bar, and various prepregs forming the main body layer 11 are wound thereon. The prepreg forming the main body layer 11 is appropriately wound several times in a state where the fiber direction is aligned in the axial direction, the circumferential direction, or the inclined direction, as usual.
[0017]
Such a flexible member 16 may be wound together with the prepreg that forms the main body layer 11 in a state of being overlapped with the prepreg that forms the main body layer 11 in addition to being wound around the core metal alone. In either case, the flexible sheet forming the flexible member 16 has a width of 5 to 50 mm at one end, a width of 5 to 20 mm at the other end, and a length that can be wound at least once. It is preferable to form in a shape. The thickness of the flexible sheet is preferably about 0.01 to 0.2 mm, particularly preferably about 0.01 to 0.1 mm. When it is formed thicker than this, there is a high possibility that wrinkles that cause a reduction in strength are formed in the main body layer 11.
[0018]
And when winding actually, it can wind easily, without forming a level | step-difference part in the inner surface of the main fence pipe 10 by winding on a metal core from the edge part of a wide side. By forming the flexible sheet to the above-described dimensions, the flexible member 16 having an axial dimension of 5 to 50 mm is formed on the inner surface of the main tube 10 across the entire circumference thereof with the gradient converting portion T interposed therebetween.
[0019]
The flexible member 16 is not limited to the flexible sheet as described above, and any elastic modulus lower than this or lower than that can be used as long as it can prevent the outer surface of the intermediate tube 8 housed inside from being damaged. In addition to rubber materials such as synthetic rubber or natural rubber having hardness, resin materials such as paint, it is also possible to use appropriate materials such as cloth and wood. When formed of a rubber material, the rubber hardness is preferably about 50 to 90 degrees.
[0020]
Furthermore, the flexible member 18 is also arranged in the innermost layer at the front end B of the main pipe 10. This flexible member 18 is made shorter than the length of the mating portion of the proximal end portion 8A of the middle rod tube 8, and when the middle rod tube 8 is shaken out, the intermediate tube 8 and the main rod tube 10 are reliably connected. It is preferable to maintain the combined state. The length of the flexible member 18 is preferably in the range of 10 to 35 mm and about 25 mm. Such a flexible member 18 can be formed by the same method from the same material as the flexible sheet forming the flexible member 16 disposed in the above-described gradient converting portion T. However, the flexible member 18 is retracted or stored. In doing so, since a relatively large impact may be given, it is preferable to form the same as the flexible member 16 or with a lower hardness.
[0021]
When the flexible member 18 is formed of the flexible sheet as described above, since the gradient is small, the rectangular flexible sheet or the leading edge is perpendicular to the axis of the main tube 10 and the trailing edge is inclined. It is preferable to form in the trapezoid shape. Also, the length is the same as described above, as long as it has a dimension that can be wound at least once.
[0022]
The main rod tube 10 formed in this way prevents the outer surface of the intermediate rod tube 8 accommodated in the flexible member 16 of the gradient converting portion T from being damaged, and the flexible member 18 of the head portion B is the intermediate rod. By preventing the outer surface of the tube 8 from being damaged when the tube 8 is pulled out and stored, damage to the surface of the intermediate rod tube 8 can be prevented over a long period of time while maintaining the lightweight structure of the fishing rod.
[0023]
In particular, in the case of the intermediate tube 8 that has not been surface-treated, the spiral unevenness of the fastening tape that was wound at the time of thermosetting in order to stabilize the resin of the prepreg remains. Damage caused by scraping the unevenness at the gradient converting portion T is almost certainly prevented by the flexible member 16 provided on the gradient converting portion T. Furthermore, not only such irregularities but also damage to the coating film on the surface can be prevented, so even when a thin coating film is formed, the occurrence of scratches that reach the main body layer is suppressed. Therefore, it is possible to extend the life of the intermediate tube.
[0024]
In the above-described embodiment, the main fishing rod 10 of the swing-out type fishing rod has been described. However, for example, even in the case of a splicing type fishing rod, a rod having a smaller diameter than this can be accommodated therein. Any fishing rod can be applied. Further, not only the main pipe 10 but also, for example, commonly called “two-end”, the small pipes are alternately accommodated in the two pipes of the main pipe and the pipe connected to the end. In the case of a fishing rod, the flexible members 16 and 18 as described above can be provided on both the main rod and the rod connected to the tip. In this case, it is preferable to provide the flexible member 18 of the ball opening B at the front end of the storage-side soot tube. Moreover, it is also possible to omit the flexible member 18 of the head part B.
[0025]
【The invention's effect】
As is apparent from the above, according to the present invention, when the small-diameter rod is accommodated in the large-diameter rod of the fishing rod, it is possible to prevent the outer surface of the small-diameter rod from being damaged.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main pipe according to a preferred embodiment of the present invention.
2 is a cross-sectional view showing a state in which a middle tub tube is stored in the main tub tube of FIG. 1. FIG.
FIG. 3 is an enlarged cross-sectional view of a gradient conversion portion of the main pipe of FIG.
4 is an enlarged cross-sectional view of the mouth portion of the marshal pipe in FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Marshal pipe, 11 ... Main body layer, 12 ... Front end side part, 14 ... Steeply inclined part, T ... Gradient conversion part.

Claims

It has a large-diameter soot tube that houses a small-diameter soot tube, and this large-diameter soot tube is in an intermediate portion between a small-diameter inner hole portion formed on one end side and a large-diameter inner hole portion formed on the other end side, A fishing rod having a gradient conversion portion protruding toward an inner surface, wherein the gradient conversion portion has a flexible member in an innermost layer.

The gradient conversion unit according to claim 1, characterized in that from the position of 3/4 from the end of the large径竿tube is formed on the other end, the slope is converted at 10/1000 or more in size The fishing rod described in 1.

The fishing rod according to claim 1 or 2, wherein the large-diameter rod has a flexible member in the innermost layer at the one end.

The fishing rod according to claim 3, wherein the flexible member provided in the innermost layer at the one end is equal to or lower in hardness than the flexible member provided in the innermost layer of the gradient converting portion.