JP3638339B2

JP3638339B2 - fishing rod

Info

Publication number: JP3638339B2
Application number: JP15025795A
Authority: JP
Inventors: 貴之白記
Original assignee: Shimano Inc
Current assignee: Shimano Inc
Priority date: 1995-06-16
Filing date: 1995-06-16
Publication date: 2005-04-13
Anticipated expiration: 2020-04-13
Also published as: JPH09115A

Description

【０００１】
【産業上の利用分野】
本発明は釣り竿、特に、連結可能な複数の竿材を備えた釣り竿に関する。
【０００２】
【従来の技術】
一般に、釣り竿は、持ち運びを容易にするために複数の竿材から構成されている。並継竿の場合、各竿材の端部に嵌合連結部が設けられ、雄雌嵌合により連結されている。従来、この種の嵌合連結部の雄嵌合部には透明塗料からなる樹脂層が、雌部には不織布にエポキシ樹脂を含浸したものをリーマ加工して形成した樹脂層がそれぞれ設けられている。
【０００３】
このような並継竿では、持ち運びの際には各竿材を外してロッドケースに収納し、使用するときに各竿材を嵌合連結部で連結している。
【０００４】
【発明が解決しようとする課題】
前記従来の構成では、竿材を嵌合連結部で連結するときに必要な力（以下、押し力という）に比べて抜くときに必要な力（以下、抜き力という）が大きくなり、竿材が抜けにくくなることがある。また、嵌合連結部で両竿材が固着して、竿材が抜けなくなることがある。
【０００５】
また、何回も抜き差しすると、嵌合連結部の嵌め合いが甘くなり、ガタやキシミが生じることがある。
本発明の目的は、嵌合連結部での竿材の抜き操作を容易にし、かつ嵌合連結部でのガタやキシミが生じにくい釣り竿を提供することにある。
【０００６】
【課題を解決するための手段】
発明１に係る釣り竿は、複数の竿材と、嵌合連結部とを備えている。嵌合連結部は、各竿材をそれらの端部に形成された雄嵌合部及び雌嵌合部により連結する。そして、雄嵌合部及び雌嵌合部は互いにテーパ加工されるとともに、雄嵌合部のテーパは雌嵌合部のテーパより大きい。また、嵌合連結部は、雄嵌合部に形成された柔軟性を有しかつ静止摩擦係数と動摩擦係数とが近似した樹脂製の嵌合層を有している。
発明２に係る釣り竿は、発明１記載の釣り竿において、嵌合層が弾力性を有する微粒子を含有したウレタン樹脂塗料を塗布することで形成されている。
【０００７】
発明３に係る釣り竿は、発明１または２記載の釣り竿において、静止摩擦係数と動摩擦係数とは実質的に同一である。
【０００８】
【作用】
発明１に係る釣り竿では、嵌合連結部の雄嵌合部に柔軟性を有する嵌合層が形成されているので、ガタやキシミがなくなる。また、嵌合層の動摩擦係数と静止摩擦係数とが近似しているので、押し力と抜き力とが近似し、一定の押し力に対して抜き力のばらつきが少なくなる。このため、抜けにくくなったり固着することが少なくなり、抜き操作が容易になる。さらに、雌嵌合部より大きなテーパを雄嵌合部に形成することで、雌嵌合部の入口付近で両者が接触するいわゆる玉口当たりになるため、水等が竿材内部に入りにくくなる。
【０００９】
発明２に係る釣り竿では、嵌合層が弾力性を有する微粒子を含有したウレタン樹脂塗料を塗布することで形成されているので、嵌合層の形成が容易である。
発明３に係る釣り竿では、静止摩擦係数と動摩擦係数とは実質的に同一であるので、押し力と抜き力とがより近似し、一定の押し力に対して抜き力のばらつきがより少なくなる。このため、抜けにくくなったり固着することが少なくなり、抜き操作がより容易になる。
【００１０】
【実施例】
図１は本発明の一実施例による並継式の釣り竿を示している。
図１において、釣り竿は、穂先竿材１０と、中間竿材１１と、手元竿材１２の３つの竿材から構成されている。各竿材１０〜１２は、それぞれ雄雌嵌合により連結されている。すなわち、穂先竿材１０及び中間竿材１１の後端（図１右端）には雄嵌合部１５，１６がそれぞれ設けられている。また、中間竿材１１及び手元竿材１２の前端（図１左端）には雌嵌合部１７，１８がそれぞれ設けられている。手元竿材１２には、握り部１３とリールシート台１４とが設けられている。
【００１１】
各竿材１０〜１２は、図２に示すように、ガラス繊維，炭素繊維等の高強度繊維を含んだ樹脂を筒状に成形して得られた竿素材２０と、竿素材２０の表面に形成された塗膜２１とを備えている。雄嵌合部１５，１６の表面には、さらに、弾力性を有する微粒子を含有したウレタン樹脂塗料（たとえばカシュー（株）社製の商品名「セノソフトII」、藤倉化成（株）製の商品名「ベルベックス」、東和ペイント（株）社製の「ＡＮＥＸＴＥＬ」等）を塗布した嵌合層２２が形成されている。また、雌嵌合部１７，１８には、竿素材２０の内周面に、不織布にエポキシ樹脂を含浸させた樹脂層２３が形成されている。この樹脂層２３は、エポキシ樹脂を含浸させた不織布を加圧焼成し、最後にリーマ加工することにより所定の精度に仕上げられている。
【００１２】
塗膜２１は、竿素材２０の外周面に形成された下地クリア層３０と、所望の色を発色するためのカラー層３１と、仕上げクリア層３２とから構成されている。下地クリア層３０は、たとえば竿素材２０の表面に透明下地塗料をしごき塗装することで形成される。カラー層３１は、所望の色を有するＮＹウレタン樹脂塗料を下地クリア層３０上にシゴキ塗装することで形成される。仕上げクリア層３２は、カラー層３１上にＮＹクリア塗料を吹きつけ塗装することで形成される。また嵌合層２２は、たとえばセノソフトIIを吹き付け塗装することで形成されている。
【００１３】
次に、釣り竿の製造方法について説明する。
まず、マンドレルに雌嵌合部１７，１８となるエポキシ樹脂を含浸した不織布を巻き付け、その上にさらにたとえば炭素繊維に樹脂を含浸したフリプレグを種々の方向に巻き付ける。そして、この上に熱収縮性テープを巻き付けた状態で加熱することで加圧焼成した後マンドレルを抜く。このようにして竿素材２０を得、竿素材２０の端部に雌嵌合部１７，１８の樹脂層２３を同時に形成する。この後、樹脂層２３についてはリーマ加工され、たとえばテーパ２／１０００に加工される。
【００１４】
続いて、塗膜２１の形成が行われる。塗膜２１は、前述したように、下地クリア層３０をしごき塗装により形成した後、所望の色のカラー層３１をしごき塗装により形成し、さらに、吹き付け塗装により仕上げクリア層３２を形成して得られる。最後に、雄嵌合部１５，１６となる部分に、セノソフトII塗料を吹き付け塗装により吹き付けて嵌合層２２を形成する。なお、嵌合層２２の厚みは、５〜２５μｍ、好ましくは７〜１２μｍがよい。また、嵌合層２２の端部に向かうテーパは２．３／１０００程度が好ましい。このように雌嵌合部１７，１８より大きなテーパを雄嵌合部１５，１６に形成することで、雌嵌合部１７，１８の入口付近で両者が接触するいわゆる玉口当たりになるため、水等が竿材内部に入りにくくなる。
【００１５】
このようにして得られた雄嵌合部１５，１６の表面には嵌合層２２が形成されているため、雄嵌合部１５，１６を雌嵌合部１７，１８に嵌め込む際、樹脂層２３との接触が柔軟であり、ガタやキシミが生じにくい。
また、柔軟性を有する塗膜を形成した場合の摩擦係数の変化について測定した。雄嵌合部に使用する塗料によって、押し力に対する抜き力や抜き力そのもののばらつきに大きな違いが見られることがわかっている。その原因の１つが、静止摩擦係数および動摩擦係数の違いに起因しているものと推定し、以下の方法で実施例と比較例において静止摩擦係数および動摩擦係数を測定した。すなわち、竿材を連結する際には両竿材が移動しているので動摩擦状態であり、竿材を外す際には両竿材は静止した状態であるので静止摩擦状態であると考えられる。このため、二つの摩擦係数の違いが押し力に対する抜き力のばらつきの原因となると推定されるのである。
【００１６】
〔測定方法〕
雄嵌合部の代わりに、平坦なＯＨＰフィルムに下記の塗料を均一に吹き付け塗装したものを用意した。実施例としてはセノソフトIIを塗布し、従来例１としてＮＹクリア塗料を、従来例２として艶消し塗料をそれぞれ塗布した。また、雌嵌合部の代わりに、平坦なアルミニウムにエポキシ樹脂を含浸した不織布を積層し、加圧焼成後^#１８０サンドペーパーで表面を研磨したものを用意した。
【００１７】
このようにして吹き付け塗装を行った雄嵌合部の代替品であるＯＨＰフィルム上に、雌嵌合部の代替品であるアルミニウム板を置き、その上に２ｋｇｆのおもりを乗せ、おもりに糸の一端を固定し、糸の他端をばね秤で平行に引いて静止摩擦係数および動摩擦係数を測定した。
そのときのドライ状態及びウェット状態での２つの摩擦係数を表１および表２に示す。表１および表２の結果をグラフ化して表したものが図４である。
【００１８】
【表１】

【００１９】
【表２】

【００２０】
図４から明らかなように、実施例に用いたセノソフトIIを塗布した場合、静止摩擦係数と動摩擦係数とはほとんど同じである。これはウェット状態であってもドライ状態であっても変化しない。一方、従来例のＮＹクリアや艶消し塗料を塗布した場合、静止摩擦係数と動摩擦係数とが大きく変化している。
これらのことから、実施例では、静止摩擦係数と動摩擦係数との差がほとんどないということで、押し力と抜き力とがほぼ一定になることがわかる。なお、静止摩擦係数と動摩擦係数との差は、０．０５以下が好ましく、より好ましくは０．０２以下である。
【００２１】
このように、動摩擦係数と静止摩擦係数との数値が近似した嵌合層２２を有しているため、押し力に対して抜き力が近似しており、一定の押し力に対して抜き力のばらつきが少なくなり、嵌合連結部における固着が防止される。
〔実験例〕
雄嵌合部１５，１６にセノソフトIIを塗布した嵌合層２２を設けた実施例と、ＮＹクリア塗料を塗布した嵌合層を設けた従来例とで同一外径のものを２種作って押し力及び抜き力のテストを行った。なお使用した釣り竿は、シマノ製のへら釣り用の「朱絞峰攻」を用いた。このときの嵌合層２２の膜厚は約１０μｍである。また雄嵌合部１５，１６の外径は３．１４〜３．２８ｍｍ、雌嵌合部１７，１８の内径は３．１０〜３．２６ｍｍである。
【００２２】
表３に、押し力３ｋｇｆでの抜き力についての試験結果を示す。以下、試験結果の数値は平均値を示し、かっこ内に最小値と最大値とを示している。
【００２３】
【表３】

【００２４】
ここで♯１は穂先竿材と中間竿材との嵌合時の数値を、♯２は中間竿材と手元竿材との嵌合時の数値をそれぞれ示している。ここでは、押し力が３ｋｇｆの場合、実施例では抜き力が３．３〜３．５ｋｇｆで、押し力と抜き力との差が余り大きな数値になっていないのに対して、従来例では抜き力が４．１〜４．２ｋｇｆになり押し力に対して抜き力が大きな数値になっている。また、抜き力のバラツキが実施例では３．３〜３．６であり、その差が０．３と小さいのに対して、従来例では、バラツキが３．５〜５．２であり、その差が１．７もあり、抜き力のバラツキが大きいことが分かった。このため、実施例の釣り竿は、従来品に比べて、抜きやすくかつ固着しにくい製品になっていることが分かる。
【００２５】
続いて、押し力を大きくした場合にドライ状態及びウェット状態で抜き力がどのように変化するかを実施例と従来例で比べてみた。ここではドライ状態、ウェット状態ともそれぞれ４．０ｋｇｆと５．０ｋｆｇの押し力で抜き力を測定した。測定結果を表４に示す。
【００２６】
【表４】

【００２７】
実施例の４ｋｇｆでの抜き力は、ドライ状態のとき４．２〜４．３、ウェット状態では４．１〜４．４ｋｇｆであり、状態の変化にも係わらず、抜き力と押し力との差が小さくかつ抜き力のバラツキも小さかった。また、５ｋｇｆでの抜き力は、ドライ状態のとき５．２〜５．７、ウェット状態では５．３〜５．７ｋｇｆであり、押し力４ｋｇｆの場合に比べて少し変動が大きいが状態の変化にも係わらず、抜き力と押し力との差は小さくかつバラツキも小さかった。
【００２８】
一方、従来例の４ｋｇｆでの抜き力は、ドライ状態のとき５．４〜５．６、ウェット状態では５．７〜５．８ｋｇｆである。また、５ｋｇｆでの抜き力は、ドライ状態のとき６．９〜７．３、ウェット状態では７．２〜７．６ｋｇｆである。したがって、抜き力と押し力との差が大きかった。また、最大値，最小値からも分かるようにバラツキも大きかった。
【００２９】
続いて、雌嵌合部にリーマ加工で２／１０００のテーパをつけた場合の雄嵌合部のテーパの変化による押し力に対する抜き力の変動を測定した。ここでは、ウェット状態で、押し力２ｋｇｆ，３ｋｇｆの２種で測定した。なお、雄嵌合部のテーパは、１．４／１０００、２．０／１０００、２．３／１０００、２．８／１０００の４種を用意した。測定結果を表５に示す。
【００３０】
【表５】

【００３１】
この結果、テーパは２／１００００〜２．３／１０００であると押し力と抜き力との変化が少ないことが分かった。
次に、穂先竿材の先端に繰り返し負荷をかけた場合の抜き力の変化を測定した。なお、押し力は４ｋｇｆであり、３００ｇと６００ｇの負荷をそれぞれ１０００回繰り返して穂先竿材にかけた。測定結果を表６に示す。なお、ここでは、かっこ内に表４に示した繰り返し負荷のないときの平均値を示している。
【００３２】
【表６】

【００３３】
この結果、実施例では３００回の負荷に対して抜き力の変化が４．０〜４．３ｋｇｆ、６００回の負荷に対して抜き力の変化が３．８〜４．３ｋｇｆと抜き力があまり変化しなかった。一方、従来例では３００回の負荷に対して抜き力の変化が５．３〜５．６、６００回の負荷に対して抜き力の変化が５．０〜５．５となった。このように、実施例、従来例とも繰り返し負荷の有無に係わらず抜き力があまり変化しないことが分かった。
【００３４】
次に、竿材を繰り返して抜き差しした場合の抜き力の変化を測定した。なお、押し力は３ｋｇｆであり、繰り返し回数は６００回である。測定結果を表７に示す。
【００３５】
【表７】

【００３６】
実施例では、６００回の繰り返し抜き差し動作に対して３．４〜３．５ｋｇｆ程度の抜き力の変化になり、繰り返して抜き差し動作を行っても抜き力に変化が少ないことが分かった。一方、従来例では、６００回の繰り返し抜き差し動作に対して４．２〜４．３ｋｇｆ程度の抜き力の変化になった。この結果、このときは両者とも抜き力の大きな変化はないが、従来例では、抜き力のバラツキが大きいことが分かった。
【００３７】
なお、並継式の釣り竿に代えて振出式の釣り竿にも本発明を適用できる。
また、実施例ではガイド付の竿を例示したがガイドなしのへら釣り用の釣り竿にも本発明を適用できる。
【００３８】
【発明の効果】
発明１に係る釣り竿では、嵌合連結部の雄嵌合部に柔軟性を有する嵌合層が形成されているので、ガタやキシミがなくなる。また、嵌合層の動摩擦係数と静止摩擦係数とが近似しているので、押し力と抜き力とが近似し、一定の押し力に対して抜き力のばらつきが少なくなる。このため、抜けにくくなったり固着することが少なくなり、抜き操作が容易になる。さらに、雌嵌合部より大きなテーパを雄嵌合部に形成することで、雌嵌合部の入口付近で両者が接触するいわゆる玉口当たりになるため、水等が竿材内部に入りにくくなる。
【００３９】
発明２に係る釣り竿では、嵌合層が弾力性を有する微粒子を含有したウレタン樹脂塗料を塗布することで形成されているので、嵌合層の形成が容易である。
発明３に係る釣り竿では、静止摩擦係数と動摩擦係数とは実質的に同一であるので、押し力と抜き力とがより近似し、一定の押し力に対して抜き力のばらつきがより少なくなる。このため、抜けにくくなったり固着することが少なくなり、抜き操作がより容易になる。
【図面の簡単な説明】
【図１】本発明の一実施例による釣り竿の側面図。
【図２】雄雌嵌合部の断面部分図。
【図３】雄嵌合部の断面拡大図。
【図４】摩擦係数の測定結果を示すグラフ。
【符号の説明】
１０穂先竿材
１１中間竿材
１２手元竿材
１５，１６雄嵌合部
１７，１８雌嵌合部
２２嵌合層[0001]
[Industrial application fields]
The present invention relates to a fishing rod, and more particularly to a fishing rod having a plurality of connectable rod materials.
[0002]
[Prior art]
In general, a fishing rod is composed of a plurality of rods to facilitate carrying. In the case of a side-by-side joint, a fitting connection portion is provided at the end of each saddle member and is connected by male-female fitting. Conventionally, a resin layer made of a transparent paint is provided on the male fitting portion of this type of fitting connection portion, and a resin layer formed by reaming a nonwoven fabric impregnated with an epoxy resin is provided on the female portion, respectively. Yes.
[0003]
In such a side-by-side kite, each carrying member is removed and stored in a rod case when being carried, and each fitting member is connected by a fitting connection portion when used.
[0004]
[Problems to be solved by the invention]
In the conventional configuration, the force (hereinafter referred to as “pulling force”) required for unloading is larger than the force (hereinafter referred to as “pressing force”) required when the brazing material is connected by the fitting connection portion. May be difficult to remove. In addition, both the brazing materials may be fixed at the fitting connection portion, and the brazing material may not come off.
[0005]
Further, if the connector is inserted and removed many times, the fitting of the fitting connecting portion becomes sweet and looseness and creaking may occur.
An object of the present invention is to provide a fishing rod that facilitates the operation of removing the rod material at the fitting connection portion and is less likely to cause backlash and creaking at the fitting connection portion.
[0006]
[Means for Solving the Problems]
The fishing rod according to the first aspect includes a plurality of rod members and a fitting connection portion. A fitting connection part connects each saddle material with the male fitting part and female fitting part which were formed in those edge parts . The male fitting portion and the female fitting portion are tapered, and the male fitting portion has a larger taper than the female fitting portion. Moreover, the fitting connection part has the resin-made fitting layer which has the softness | flexibility formed in the male fitting part, and the static friction coefficient and the dynamic friction coefficient approximated.
A fishing rod according to a second aspect of the present invention is the fishing rod according to the first aspect, wherein the fitting layer is formed by applying a urethane resin paint containing fine particles having elasticity.
[0007]
A fishing rod according to a third aspect is the fishing rod according to the first or second aspect, wherein the static friction coefficient and the dynamic friction coefficient are substantially the same.
[0008]
[Action]
In the fishing rod according to the first aspect, since the fitting layer having flexibility is formed in the male fitting portion of the fitting connection portion, there is no backlash or creaking. Further, since the dynamic friction coefficient and the static friction coefficient of the fitting layer are approximated, the pressing force and the pulling force are approximated, and variation in the pulling force is reduced with respect to a certain pressing force. For this reason, it becomes difficult to come off or adheres less easily, and the removal operation becomes easy. Furthermore, by forming a taper larger than the female fitting portion on the male fitting portion, it becomes a so-called ball opening where both contacts in the vicinity of the inlet of the female fitting portion, so that water or the like is difficult to enter the inside of the brazing material.
[0009]
In the fishing rod according to the second aspect, since the fitting layer is formed by applying a urethane resin paint containing fine particles having elasticity, it is easy to form the fitting layer.
In the fishing rod according to the third aspect, the static friction coefficient and the dynamic friction coefficient are substantially the same, so that the pressing force and the pulling force are more approximate, and the variation in the pulling force is smaller with respect to a certain pressing force. For this reason, it becomes difficult to come off or stick, and the removal operation becomes easier.
[0010]
【Example】
FIG. 1 shows a side-by-side fishing rod according to an embodiment of the present invention.
In FIG. 1, the fishing rod is composed of three rod materials, a tip rod material 10, an intermediate rod material 11, and a hand rod material 12. Each saddle member 10-12 is connected by male-female fitting. In other words, male

fitting portions

15 and 16 are provided at the rear ends (right end in FIG. 1) of the tip rod material 10 and the intermediate rod material 11, respectively. Further,

female fitting portions

17 and 18 are provided at the front ends (left end in FIG. 1) of the intermediate saddle member 11 and the hand saddle member 12, respectively. The hand collar 12 is provided with a grip portion 13 and a reel seat base 14.
[0011]
As shown in FIG. 2, each of the brazing materials 10 to 12 is formed on the surface of the cocoon material 20 obtained by molding a resin containing high-strength fibers such as glass fiber and carbon fiber into a cylindrical shape, and the surface of the cocoon material 20. The formed coating film 21 is provided. On the surfaces of the male fitting

portions

15 and 16, a urethane resin paint containing fine particles having elasticity (for example, trade name “Senosoft II” manufactured by Cashew Co., Ltd., product name manufactured by Fujikura Kasei Co., Ltd.) A fitting layer 22 to which “BELVEX” or “ANEXTEL” manufactured by Towa Paint Co., Ltd. is applied is formed. In addition, a resin layer 23 in which a nonwoven fabric is impregnated with an epoxy resin is formed on the inner peripheral surface of the collar material 20 in the

female fitting portions

17 and 18. The resin layer 23 is finished with a predetermined accuracy by pressurizing and firing a nonwoven fabric impregnated with an epoxy resin, and finally performing a reaming process.
[0012]
The coating film 21 includes a base clear layer 30 formed on the outer peripheral surface of the bag material 20, a color layer 31 for developing a desired color, and a finish clear layer 32. The base clear layer 30 is formed, for example, by ironing a transparent base paint on the surface of the bag material 20. The color layer 31 is formed by applying an NY urethane resin paint having a desired color on the base clear layer 30. The finish clear layer 32 is formed by spraying a NY clear paint onto the color layer 31. The fitting layer 22 is formed, for example, by spraying Senosoft II.
[0013]
Next, a method for manufacturing a fishing rod will be described.
First, a nonwoven fabric impregnated with an epoxy resin to be the

female fitting portions

17 and 18 is wound around the mandrel, and further, for example, a prepreg impregnated with a resin in carbon fiber is wound around in various directions. And a mandrel is extracted after pressure-baking by heating in the state which wound the heat-shrinkable tape on this. In this way, the heel material 20 is obtained, and the resin layers 23 of the

female fitting portions

17 and 18 are simultaneously formed on the ends of the heel material 20. Thereafter, the resin layer 23 is reamed, for example, tapered to 2/1000.
[0014]
Subsequently, the coating film 21 is formed. As described above, the coating film 21 is obtained by forming the base clear layer 30 by ironing, forming a color layer 31 of a desired color by ironing, and further forming a finish clear layer 32 by spray coating. It is done. Finally, the fitting layer 22 is formed by spraying Cenosoft II paint onto the portions to be the male

fitting portions

15 and 16 by spray painting. In addition, the thickness of the fitting layer 22 is 5-25 micrometers, Preferably 7-12 micrometers is good. Further, the taper toward the end of the fitting layer 22 is preferably about 2.3 / 1000. By forming a taper larger than the female

fitting portions

17 and 18 on the male

fitting portions

15 and 16 in this way, a so-called muzzle where both contact in the vicinity of the inlets of the female

fitting portions

17 and 18 is formed. Etc. will not easily enter the interior of the bran.
[0015]
Since the fitting layers 22 are formed on the surfaces of the male

fitting portions

15 and 16 obtained in this manner, when the male

fitting portions

15 and 16 are fitted into the female

fitting portions

17 and 18, a resin is used. Contact with the layer 23 is flexible, and play and creaking are unlikely to occur.
Moreover, it measured about the change of the friction coefficient at the time of forming the coating film which has a softness | flexibility. It is known that there is a great difference in the extraction force against the pressing force and the variation in the extraction force itself depending on the paint used for the male fitting portion. One of the causes was presumed to be caused by the difference between the static friction coefficient and the dynamic friction coefficient, and the static friction coefficient and the dynamic friction coefficient were measured in Examples and Comparative Examples by the following method. That is, when the brazing material is connected, both the brazing materials are moving, so that they are in a dynamic friction state, and when the brazing material is removed, both the brazing materials are in a stationary state, and thus it is considered that they are in a static friction state. For this reason, it is estimated that the difference between the two friction coefficients causes variations in the pulling force with respect to the pushing force.
[0016]
〔Measuring method〕
Instead of the male fitting portion, a flat OHP film was prepared by spraying the following paint uniformly. As an example, Senosoft II was applied, NY clear paint was applied as Conventional Example 1, and matte paint was applied as Conventional Example 2. Further, instead of the female fitting portion, a non-woven fabric impregnated with epoxy resin in flat aluminum was laminated, and after pressure firing, a surface polished with ^# 180 sandpaper was prepared.
[0017]
An aluminum plate, which is a substitute for the female fitting portion, is placed on the OHP film, which is a substitute for the male fitting portion, which has been spray-painted in this manner, and a 2 kgf weight is placed on the aluminum plate, and the weight is placed on the weight. One end was fixed, and the other end of the yarn was pulled in parallel with a spring balance to measure the static friction coefficient and the dynamic friction coefficient.
Tables 1 and 2 show the two friction coefficients in the dry state and the wet state at that time. FIG. 4 is a graph showing the results of Tables 1 and 2.
[0018]
[Table 1]

[0019]
[Table 2]

[0020]
As is apparent from FIG. 4, when Cenosoft II used in the example is applied, the static friction coefficient and the dynamic friction coefficient are almost the same. This does not change whether it is wet or dry. On the other hand, when the NY clear or matte paint of the conventional example is applied, the static friction coefficient and the dynamic friction coefficient are greatly changed.
From these facts, it can be understood that the pushing force and the pulling force are almost constant in the embodiment because there is almost no difference between the static friction coefficient and the dynamic friction coefficient. The difference between the static friction coefficient and the dynamic friction coefficient is preferably 0.05 or less, more preferably 0.02 or less.
[0021]
As described above, since the fitting layer 22 having approximate numerical values of the dynamic friction coefficient and the static friction coefficient is provided, the pulling force is approximated with respect to the pressing force, and the pulling force is determined with respect to the constant pressing force. The variation is reduced, and sticking at the fitting connection portion is prevented.
[Experimental example]
Two examples of the same outer diameter are made in the embodiment in which the fitting layer 22 coated with Cenosoft II is provided on the male

fitting portions

15 and 16 and the conventional example in which the fitting layer coated with NY clear paint is provided. Pushing force and pulling force tests were performed. The fishing rod used was Shimano's spatula fishing “Zhu Kanfeng”. The film thickness of the fitting layer 22 at this time is about 10 μm. The male

fitting portions

15 and 16 have an outer diameter of 3.14 to 3.28 mm, and the female

fitting portions

17 and 18 have an inner diameter of 3.10 to 3.26 mm.
[0022]
Table 3 shows the test results for the pulling force at a pressing force of 3 kgf. Hereinafter, the numerical values of the test results indicate average values, and the minimum and maximum values are shown in parentheses.
[0023]
[Table 3]

[0024]
Here, # 1 represents a numerical value when the tip brazing material and the intermediate brazing material are fitted, and # 2 represents a numerical value when the intermediate brazing material and the hand brazing material are fitted. Here, when the pressing force is 3 kgf, the pulling force is 3.3 to 3.5 kgf in the embodiment, and the difference between the pressing force and the pulling force is not so large, whereas in the conventional example, the pulling force is The force is 4.1 to 4.2 kgf, and the pulling force is a large value with respect to the pressing force. Further, the variation in the drawing force is 3.3 to 3.6 in the embodiment, and the difference is as small as 0.3, whereas in the conventional example, the variation is 3.5 to 5.2, There was a difference of 1.7, and it was found that the variation in the drawing force was large. For this reason, it can be seen that the fishing rod of the example is a product that is easier to remove and less sticking than the conventional product.
[0025]
Subsequently, it was compared between the example and the conventional example how the pulling force changes in the dry state and the wet state when the pressing force is increased. Here, the pulling force was measured with a pressing force of 4.0 kgf and 5.0 kfg in both the dry state and the wet state. Table 4 shows the measurement results.
[0026]
[Table 4]

[0027]
The pulling force at 4 kgf in the example is 4.2 to 4.3 in the dry state, and 4.1 to 4.4 kgf in the wet state. The difference was small and the variation in extraction force was small. In addition, the pulling force at 5 kgf is 5.2 to 5.7 in the dry state and 5.3 to 5.7 kgf in the wet state, and the variation is slightly larger than that in the case of the pushing force 4 kgf. Nevertheless, the difference between the pulling force and the pushing force was small and the variation was small.
[0028]
On the other hand, the pulling force at 4 kgf in the conventional example is 5.4 to 5.6 in the dry state and 5.7 to 5.8 kgf in the wet state. The pulling force at 5 kgf is 6.9 to 7.3 in the dry state, and 7.2 to 7.6 kgf in the wet state. Therefore, the difference between the pulling force and the pushing force was large. Moreover, the variation was large as can be seen from the maximum and minimum values.
[0029]
Then, the fluctuation | variation of the drawing force with respect to the pushing force by the change of the taper of a male fitting part at the time of attaching a taper of 2/1000 to a female fitting part by reaming was measured. Here, in a wet state, measurement was performed with two types of pushing forces of 2 kgf and 3 kgf. In addition, the taper of the male fitting part prepared four types, 1.4 / 1000, 2.0 / 1000, 2.3 / 1000, and 2.8 / 1000. Table 5 shows the measurement results.
[0030]
[Table 5]

[0031]
As a result, it was found that when the taper was 2/10000 to 2.3 / 1000, the change between the pushing force and the pulling force was small.
Next, the change in the pulling force when a load was repeatedly applied to the tip of the tip brazing material was measured. The pushing force was 4 kgf, and the load of 300 g and 600 g was repeated 1000 times and applied to the tip brazing material. Table 6 shows the measurement results. Here, the average value when there is no repetitive load shown in Table 4 in parentheses is shown.
[0032]
[Table 6]

[0033]
As a result, in the embodiment, the change in the extraction force is 4.0 to 4.3 kgf with respect to 300 loads, and the change in the extraction force is 3.8 to 4.3 kgf with respect to 600 loads. It did not change. On the other hand, in the conventional example, the change in the extraction force was 5.3 to 5.6 with respect to 300 loads, and the change in the extraction force was 5.0 to 5.5 with respect to 600 loads. Thus, it was found that the extraction force did not change much regardless of the presence or absence of repeated load in both the example and the conventional example.
[0034]
Next, the change in the pulling force when the brazing material was repeatedly inserted and removed was measured. The pushing force is 3 kgf and the number of repetitions is 600 times. Table 7 shows the measurement results.
[0035]
[Table 7]

[0036]
In the Example, it turned out that it becomes a change of about 3.4-3.5 kgf with respect to 600 insertion / extraction operation | movement repeatedly, and even if it repeats an insertion / extraction operation | movement, there is little change in extraction force. On the other hand, in the conventional example, the pulling force changes by about 4.2 to 4.3 kgf with respect to 600 times of repeated pulling and unplugging operations. As a result, it was found that there was no significant change in the extraction force in both cases, but the variation in the extraction force was large in the conventional example.
[0037]
It should be noted that the present invention can also be applied to a swing-out type fishing rod instead of a parallel-type fishing rod.
In the embodiment, a rod with a guide is illustrated, but the present invention can also be applied to a rod for fishing with a spatula without a guide.
[0038]
【The invention's effect】
In the fishing rod according to the first aspect, since the fitting layer having flexibility is formed in the male fitting portion of the fitting connection portion, there is no backlash or creaking. Further, since the dynamic friction coefficient and the static friction coefficient of the fitting layer are approximated, the pressing force and the pulling force are approximated, and variation in the pulling force is reduced with respect to a certain pressing force. For this reason, it becomes difficult to come off or adheres less easily, and the removal operation becomes easy. Furthermore, by forming a taper larger than the female fitting portion on the male fitting portion, it becomes a so-called ball opening where both contacts in the vicinity of the inlet of the female fitting portion, so that water or the like is difficult to enter the inside of the brazing material.
[0039]
In the fishing rod according to the second aspect, since the fitting layer is formed by applying a urethane resin paint containing fine particles having elasticity, it is easy to form the fitting layer.
In the fishing rod according to the third aspect, the static friction coefficient and the dynamic friction coefficient are substantially the same, so that the pressing force and the pulling force are more approximate, and the variation in the pulling force is smaller with respect to a certain pressing force. For this reason, it becomes difficult to come off or stick, and the removal operation becomes easier.
[Brief description of the drawings]
FIG. 1 is a side view of a fishing rod according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of a male-female fitting portion.
FIG. 3 is an enlarged cross-sectional view of a male fitting portion.
FIG. 4 is a graph showing a measurement result of a friction coefficient.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Ear tip material 11 Intermediate foot material 12

Hand foot material

15, 16

Male fitting part

17, 18 Female fitting part 22 Fitting layer

Claims

A plurality of cocoons,
A fitting connecting portion for connecting the respective saddle materials by a male fitting portion and a female fitting portion formed at their end portions ,
The male fitting portion and the female fitting portion are tapered with each other, and the taper of the male fitting portion is larger than the taper of the female fitting portion,
The fitting connecting portion has a resin-made fitting layer that has flexibility formed in the male fitting portion and approximates a static friction coefficient and a dynamic friction coefficient .
Fishing Risao.

The fishing rod according to claim 1, wherein the fitting layer is formed by applying a urethane resin paint containing fine particles having elasticity.

The fishing rod according to claim 1 or 2, wherein the static friction coefficient and the dynamic friction coefficient are substantially the same.