JP2003274802A - Joining type fishing rod - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joining type fishing rod preventing a stress concentration in the vicinity of an end part of the joined zone, and smoothing a bending change. <P>SOLUTION: This fishing rod obtained by joining a large diameter rod tube with a small diameter rod tube both made from a fiber reinforced resin is characterized in that there exists no zone of a layer consisting mainly of an axial direction-reinforcing fiber in at least either one of the end part side zone 10E of a joining part 10T of the large diameter rod tube or the end part side zone 12E of a joining part 12T of the small diameter rod tube. <P>COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、並継式、逆並継
式、振出式、インロー継合式の継合式釣竿に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a splicing type fishing rod of a splicing type, a reverse splicing type, a drawing type and a spigot splicing type.

【０００２】[0002]

【従来の技術】釣竿には大きな曲げ力が作用するが、こ
れによっても竿が破損しないよう、最大曲げの部位が順
次滑らかに後方に移動するよう竿管各部位の曲げ剛性が
設定される。然しながら、竿管を継ぎ合わせる継合式釣
竿の継合領域では、大小竿管の重なりが生じ、一般的
に、その前後領域に比べて曲げ剛性が急に上昇する。こ
の継合領域端部における応力集中の防止や、撓みバラン
ス向上に鑑みて、本出願人による特開平１１−２１５９
３６号公報では、大小竿管の継合部の端部側領域におい
て、低剛性層を形成する構造が開示されている。2. Description of the Related Art A large bending force acts on a fishing rod, and the bending rigidity of each portion of the rod tube is set so that the portion of the maximum bending is smoothly moved rearward so as not to damage the rod. However, in the joining region of the joining type fishing rod where the rod pipes are joined, the large and small rod pipes are overlapped with each other, and generally, the bending rigidity is suddenly increased as compared with the front and rear regions thereof. In view of prevention of stress concentration at the end of the joint region and improvement of flexural balance, Japanese Patent Application Laid-Open No. 11-2159 filed by the present applicant.
Japanese Patent Publication No. 36 discloses a structure in which a low-rigidity layer is formed in the end side region of the joint portion of the large and small rod pipes.

【０００３】[0003]

【発明が解決しようとする課題】然しながら、上記公報
開示の構造では、各竿管の継合部端部側領域には、軸長
方向指向の強化繊維の層が存在しており、この層の存在
によって継合領域の曲げ剛性の低減には限度があり、そ
の前後領域の曲げ剛性との相違は依然として高く、応力
集中の防止は充分とは言えない。また、継合部の端の曲
げ剛性が大きいと、その縁部が当接して継ぎ合わせた相
手方竿管への応力集中を大きくするが、上記公報開示の
構造では、各竿管の継合部には軸長方向指向の強化繊維
の層が（階段状に）存在しており、その継合部の端にお
いて急に存在しなくなる。従って、やはり、その継合領
域を外れた領域の曲げ剛性との相違は依然として高く、
応力集中の防止は充分とは言えない。また、この継合領
域とその前後の撓み変化を滑らかにさせるには、端から
継合部端部側領域内部にまで可及的に滑らかに曲げ剛性
を変化させる必要がある。依って本発明は、継合領域の
端部近くにおける応力集中の防止された継合式釣竿の提
供を目的とする。また、応力集中防止と共に、撓み変化
が滑らかになる継合式釣竿の提供を目的とする。However, in the structure disclosed in the above publication, there is a layer of reinforcing fibers oriented in the axial direction in the region on the end portion side of the joint portion of each rod tube. Due to its existence, there is a limit to the reduction of the bending rigidity in the joint area, and the difference from the bending rigidity in the front and rear areas is still high, and it cannot be said that the prevention of stress concentration is sufficient. Further, when the bending rigidity of the end of the joint portion is large, the concentration of stress on the opponent rod pipe joined by abutting its edge portion is increased, but in the structure disclosed in the above publication, the joint portion of each rod pipe is There is a layer of reinforcing fibers oriented in the axial direction (stepwise) and suddenly disappears at the end of the joint. Therefore, again, the difference from the bending rigidity of the region outside the joint region is still high,
The prevention of stress concentration is not sufficient. Further, in order to smooth the change in the bending of the joining region and the front and rear thereof, it is necessary to change the bending rigidity as smoothly as possible from the end to the inside of the end portion side region of the joining portion. It is therefore an object of the present invention to provide a joint type fishing rod in which stress concentration is prevented near the ends of the joint area. Another object of the present invention is to provide a joint type fishing rod that prevents stress concentration and smoothes the change in deflection.

【０００４】[0004]

【課題を解決するための手段】上記目的に鑑み本発明の
請求項１では、繊維強化樹脂製の大径竿管と小径竿管と
が互いに継ぎ合わされる釣竿であって、大径竿管の継合
部の端部側領域と小径竿管の継合部の端部側領域との少
なくとも何れか一方には、軸長方向強化繊維を主体とす
る層が存在していないことを特徴とする継合式釣竿を提
供する。本明細書での継合部の端部側領域とは、この継
合部を有する竿管の端部を含む領域の意味であり、継合
部の範囲内で長さはいくらでもよい。継合部の端部側領
域に軸長方向強化繊維を主体とする層が存在していない
ため、曲げ剛性を小さく構成でき、継合領域が撓みを受
けた場合に、この端部側領域と対面している他方の竿管
部位に対して作用する力は小さくなり、応力集中が防止
できる。また、この端部側領域に対応する領域の継合領
域の曲げ剛性は小さくでき、それだけ撓み性が向上す
る。In view of the above object, according to claim 1 of the present invention, there is provided a fishing rod in which a large diameter rod pipe made of fiber reinforced resin and a small diameter rod pipe are spliced with each other. At least one of the end side region of the joint portion and the end side region of the joint portion of the small diameter rod pipe is characterized in that there is no layer mainly composed of axial longitudinal reinforcing fibers. We provide joint fishing rods. The end side region of the joint in this specification means a region including the end of the rod tube having the joint, and the length may be any length within the range of the joint. Since there is no layer mainly composed of axial reinforcing fibers in the end side region of the spliced part, the bending rigidity can be reduced, and when the spliced region undergoes bending, The force acting on the other facing rod tube portion is reduced, and stress concentration can be prevented. Further, the bending rigidity of the joining area of the area corresponding to the end side area can be reduced, and the flexibility is improved accordingly.

【０００５】請求項２では、継合部端部側領域に軸長方
向強化繊維を主体とする層が存在していない竿管の、残
りの継合部領域から該継合部端部側領域との境界部にま
で至っている軸長方向強化繊維を主体とする第１層と、
該第１層の内方又は外方に設けられ、該継合部端部側領
域から離れて設けられている軸長方向強化繊維を主体と
する第２層とを具備する請求項１記載の継合式釣竿を提
供する。第１層の端が継合部端部側領域端と接してお
り、第２層の端はこれよりも離れているため、この第２
層の端から前記第１層の端に至って更にその先方まで軸
長方向強化繊維を主体としない層を設けることができ、
この層によって、第１層と、該第１層の端と接している
継合部端部側領域の１つの層との境界部を保持できる。
また、第１層によって、第２層と、該第２層の端と接し
ている前記軸長方向強化繊維を主体としない層との境界
部を保持できる。従って、軸長方向強化繊維を主体とす
る層と、軸長方向強化繊維を主体としない層とが竿管の
長手方向に互い違いに並ぶことで、それらの境界部の強
度が保持できる。According to a second aspect of the present invention, in the rod tube in which the layer mainly composed of the axially long direction reinforcing fibers does not exist in the end portion side region of the joint portion, the remaining joint portion region to the joint portion end side region are provided. A first layer mainly composed of axial reinforcing fibers extending to the boundary with
The second layer, which is provided inside or outside of the first layer and is mainly provided with axial reinforcing fibers provided away from the joint end side region. We provide joint fishing rods. Since the end of the first layer is in contact with the end of the joint end side region and the end of the second layer is farther than this,
From the edge of the layer to the edge of the first layer and further beyond, it is possible to provide a layer not mainly composed of axial reinforcing fibers,
This layer makes it possible to retain the boundary between the first layer and one layer in the joint end side region which is in contact with the end of the first layer.
In addition, the first layer can hold the boundary between the second layer and the layer which is in contact with the end of the second layer and is not mainly composed of the axial lengthwise reinforcing fibers. Therefore, by alternately arranging the layers mainly composed of the axial length direction reinforcing fibers and the layers not mainly composed of the axial length direction reinforcing fibers in the longitudinal direction of the rod tube, the strength of the boundary portion between them can be maintained.

【０００６】請求項３では、繊維強化樹脂製の大径竿管
と小径竿管とが互いに継ぎ合わされる釣竿であって、大
径竿管の継合部と小径竿管の継合部との少なくとも一方
の端部側領域においては、曲げ剛性がその竿管の端に向
かって漸減すると共に、該端部側領域の横断面では、円
周方向において軸長方向強化繊維を主体とする層が存在
しない範囲を有することを特徴とする継合式釣竿を提供
する。円周方向において軸長方向強化繊維を主体とする
層が存在しない範囲を有するため、断面全体として曲げ
剛性を小さくでき、しかも、端部側領域において曲げ剛
性がその竿管の端に向かって漸減するため、継合部の端
による相手側竿管への応力集中を低減でき、更には、こ
の継合部の端前後の撓み変化を滑らかにできる。According to a third aspect of the present invention, there is provided a fishing rod in which a large-diameter rod pipe and a small-diameter rod pipe made of fiber reinforced resin are joined to each other, and the joining portion of the large-diameter rod pipe and the joining portion of the small-diameter rod pipe are joined together. In at least one end side region, the bending rigidity gradually decreases toward the end of the rod tube, and in the cross section of the end side region, a layer mainly composed of axially long reinforcing fibers in the circumferential direction is formed. Provided is a joint type fishing rod having a range that does not exist. Since there is a range in the circumferential direction where there is no layer mainly composed of axially reinforced fibers, the bending rigidity can be reduced in the entire cross section, and the bending rigidity in the end region gradually decreases toward the end of the rod tube. Therefore, it is possible to reduce the stress concentration on the other side rod tube due to the end of the joint portion, and further it is possible to smooth the change in bending before and after the end of the joint portion.

【０００７】[0007]

【発明の実施の形態】以下、本発明を添付図面に示す実
施形態例に基づき、更に詳細に説明する。図１は本発明
に係る並継式釣竿要部の縦断面図、図２は振出式釣竿要
部の縦断面図、図３は図１の要部拡大断面図である。本
願の各竿管は、エポキシ樹脂等の合成樹脂をマトリック
スとし、炭素繊維等の強化繊維で強化した繊維強化樹脂
製竿管である。実施例として使用しているマトリックス
はエポキシ樹脂である。図１では、後側である大径竿管
１０の前側継合部１０Ｔ内に、前側である小径竿管１２
の後側継合部１２Ｔを差し込んで継ぎ合わせている。Ｔ
Ｒは差し込んだ状態の両継合部を含んだ継合領域を示
す。継合部１０Ｔの端部側領域１０Ｅには、軸長方向指
向の強化繊維を主体とする層を設けていない。また、こ
れらのことは図２に示す振出式釣竿においても同様であ
る。並継式の場合は、本発明の構造により大径竿管の端
部（玉口部）が撓み易くなることにより、この領域の小
径竿管の撓みに追随でき、該小径竿管の不用意な抜けが
防止できる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a vertical cross-sectional view of a main part of a parallel type fishing rod according to the present invention, FIG. 2 is a vertical cross-sectional view of a main part of a swing-out type fishing rod, and FIG. 3 is an enlarged cross-sectional view of the main part of FIG. Each rod tube of the present application is a rod tube made of a fiber-reinforced resin, which is made of a synthetic resin such as an epoxy resin as a matrix and is reinforced with reinforcing fibers such as carbon fibers. The matrix used as an example is an epoxy resin. In FIG. 1, the small-diameter rod tube 12 that is the front side is provided in the front joint 10T of the large-diameter rod tube 10 that is the rear side.
The rear splicing part 12T is inserted and spliced. T
R indicates a joint area including both joints in the inserted state. The end-side region 10E of the joint 10T is not provided with a layer mainly composed of reinforcing fibers oriented in the axial direction. The same applies to the swing-out type fishing rod shown in FIG. In the case of the side-by-side type, the structure of the present invention facilitates the bending of the end portion (mouth end) of the large diameter rod tube, so that the bending of the small diameter rod tube in this region can be followed, and the small diameter rod tube is not prepared. It can be prevented from falling out

【０００８】図３を参照する。大径竿管１０の前側継合
部１０Ｔ領域内には、竿管１０の後方部（本体部）から
延伸し、軸長方向に指向した強化繊維としての炭素繊維
を主体とした第１層Ｊ１が至っている。更には、前記の
継合部１０Ｔの端部側領域１０Ｅとの境界Ｋ１にまで至
っており、その外側に同様な軸長方向炭素繊維を主体と
する第２層Ｊ２が継合部１０Ｔ領域内に至っており、前
記境界Ｋ１よりも後方位置である境界Ｋ２にまで至って
いる。Referring to FIG. In the front joint portion 10T region of the large-diameter rod tube 10, the first layer J1 mainly composed of carbon fibers as reinforcing fibers extending from the rear portion (main body portion) of the rod tube 10 and oriented in the axial direction. Has arrived. Furthermore, the boundary K1 with the end side region 10E of the joint portion 10T is reached, and the second layer J2 mainly composed of the same carbon fiber in the axial direction is located outside the boundary K1 inside the joint portion 10T region. And reaches the boundary K2, which is a position behind the boundary K1.

【０００９】前記境界Ｋ１で第１層Ｊ１と接している残
りの層Ｙ１（端部側領域１０Ｅの範囲）には、前記第１
層Ｊ１よりも曲げ剛性が数分の一程度に小さくなる繊維
強化樹脂材を設ける。例えば、強化繊維の方向を±４５
度方向等の傾斜方向に指向させたり、円周方向（９０度
方向）に指向させたりする。或いは、ガラス繊維等の弾
性率の低い強化繊維を使用する。また、これらを併用す
る、等である。The first layer J1 is in contact with the first layer J1 at the boundary K1.
A fiber reinforced resin material whose bending rigidity is smaller than that of the layer J1 by a factor of several is provided. For example, the direction of the reinforcing fiber is ± 45
It is directed in the tilt direction such as the degree direction or in the circumferential direction (90 degree direction). Alternatively, a reinforcing fiber having a low elastic modulus such as glass fiber is used. Moreover, these are used together.

【００１０】前記境界Ｋ２で第２層Ｊ２と接している残
りの層Ｙ２にも、前記層Ｙ１と同様に曲げ剛性が数分の
一程度に小さくなる繊維強化樹脂材を設ける。その具体
例は上記と同様である。これらの軸長方向層Ｊ１，Ｊ２
と層Ｙ１，Ｙ２の内側と外側には、大径竿管の本体部か
ら端面Ｋ０にまで至り、円周方向に指向した内側層Ｃ１
と外側層Ｃ２とが設けられている。更には、継合部１０
Ｔの最内層であって、端面部から継合部の長さの７割程
内部に至る位置まで、補強層Ｈが設けられている。この
補強層も強化繊維を円周方向か±４５度等の傾斜方向に
指向させる。The remaining layer Y2, which is in contact with the second layer J2 at the boundary K2, is also provided with a fiber reinforced resin material whose bending rigidity is reduced to a fraction of the same as with the layer Y1. The specific example is similar to the above. These axial layers J1, J2
On the inside and outside of the layers Y1 and Y2, the inner layer C1 extending from the main body of the large-diameter rod tube to the end surface K0 and oriented in the circumferential direction.
And an outer layer C2. Furthermore, the splicing part 10
The reinforcing layer H is the innermost layer of T and extends from the end face portion to a position that is about 70% of the length of the joint portion. This reinforcing layer also directs the reinforcing fibers in the circumferential direction or in a tilt direction such as ± 45 degrees.

【００１１】大径竿管１０の継合部１０Ｔは以上の構成
であるため、その端部側領域１０Ｅにおいては、軸長方
向の強化繊維を主体とする層が存在しないため、この領
域の曲げ剛性が非常に小さくなり、境界Ｋ２より後方の
継合部領域の曲げ剛性と比較して、好ましくは１／５以
下に設定する。更に好ましくは、１／１０以下にする。
また、この端部側領域１０Ｅとその残り領域との境界位
置Ｋ１において、曲げ剛性が急変することは撓みの滑ら
かさを阻害するため好ましくない。これに対して、本形
態例では、軸長方向第１層Ｊ１の外側の第２層Ｊ２を、
前記境界Ｋ１よりも後方位置Ｋ２が端となるように設け
ており、この境界位置Ｋ２から境界位置Ｋ１を経て先端
Ｋ０に至る領域では、曲げ剛性が段々と小さくなるよう
構成している。Since the joint portion 10T of the large-diameter rod tube 10 has the above-described structure, the end side region 10E does not have a layer mainly composed of reinforcing fibers in the axial direction, so that the bending of this region is prevented. The rigidity becomes extremely small, and it is preferably set to ⅕ or less as compared with the bending rigidity of the joint region behind the boundary K2. More preferably, it is 1/10 or less.
Further, at the boundary position K1 between the end side region 10E and the remaining region thereof, it is not preferable that the bending rigidity suddenly changes because smoothness of bending is impaired. On the other hand, in the present embodiment, the second layer J2 outside the first layer J1 in the axial direction is
The rear end position K2 of the boundary K1 is located at the end, and the bending rigidity gradually decreases in the region from the boundary position K2 to the tip K0 via the boundary position K1.

【００１２】更には、層Ｊ２と層Ｙ２との境界Ｋ２は、
該境界位置Ｋ２の前後に亘って連続したその内側の層Ｊ
１によって保持されているため、撓みを受けた場合等
に、該境界部において破損し易くなることが防止されて
いる。また、層Ｊ１と層Ｙ１との境界Ｋ１は、該境界位
置Ｋ１の前後に亘って連続したその外側の層Ｙ２によっ
て保持されているため、撓みを受けた場合等に、該境界
部において破損し易くなることが防止されている。従っ
て、継合部１０Ｔの強度が確保されている。層Ｙ２には
強化繊維を傾斜方向に指向させるのが好ましい。繊維が
位置Ｋ１の前後に亘って配向し、強度が確実に確保され
る。Further, the boundary K2 between the layer J2 and the layer Y2 is
The inner layer J continuous before and after the boundary position K2
Since it is held by No. 1, it is prevented that the boundary portion is easily damaged when it is subjected to bending. Further, since the boundary K1 between the layer J1 and the layer Y1 is held by the outer layer Y2 that is continuous outside the boundary position K1, the boundary K1 may be damaged at the boundary when it is bent. It is prevented from becoming easy. Therefore, the strength of the joint portion 10T is secured. Reinforcing fibers are preferably oriented in the tilt direction in the layer Y2. The fibers are oriented before and after the position K1 to ensure the strength.

【００１３】以上の構成があれば、本願請求項１と２は
成り立つが、この形態例では更に、小径竿管１２におい
ても同様な構造を採用している。符号’を付した記号の
示すものは、大径竿管１０において、その符号’を除い
た記号の示す層等に対応しており、詳述しない事項は、
この対応する大径竿管１０の各説明を適用する。本体部
から後側継合部１２Ｔ内の位置Ｋ１’にまで至る軸長方
向炭素繊維を主体とする層Ｊ１’を設け、それと端面が
接する端部側領域１２Ｅの層Ｙ１’には、曲げ剛性の小
さくなる層を設ける。With the above-mentioned structure, the claims 1 and 2 of the present invention can be established, but in this embodiment, the small diameter rod tube 12 also has a similar structure. What is indicated by the symbol with the symbol'corresponds to the layer or the like indicated by the symbol without the symbol'in the large-diameter rod tube 10, and matters not described in detail are
The description of the corresponding large diameter rod tube 10 is applied. A layer J1 ′ mainly composed of axial carbon fibers extending from the main body to the position K1 ′ in the rear joint 12T is provided, and the layer Y1 ′ of the end side region 12E where the end face is in contact with the layer J1 ′ has bending rigidity. To provide a small layer.

【００１４】これらの外側には、前記境界Ｋ１’よりも
前側位置を境界Ｋ２’として、本体部から軸長方向炭素
繊維を主体とする第２層Ｊ２’を設け、これと端面が接
する端面Ｋ０’側の層Ｙ２’を設ける。層Ｙ２’は、前
記層Ｙ１’と同様な低曲げ剛性の繊維強化樹脂層とす
る。層Ｊ１’と層Ｙ１’の内側には、強化繊維が円周方
向に指向した層Ｃ１’を設け、また、層Ｊ２’と層Ｙ
２’の外側には、強化繊維が円周方向に指向した層Ｃ
２’を設けている。更には、層Ｃ２’の外側に、並継式
の継合部１２Ｔの適切な外径を設定し、補強するため
に、補充層Ｈ’を設けている。上記構成による作用効果
は、大径竿管１０の場合の説明と同様である。On the outer side of these, a second layer J2 'mainly composed of carbon fibers in the axial direction is provided from the main body with a boundary K2' located in front of the boundary K1 ', and an end surface K0 at which the end surface is in contact with the second layer J2'. A'side layer Y2 'is provided. The layer Y2 ′ is a fiber-reinforced resin layer having a low bending rigidity similar to the layer Y1 ′. Inside the layers J1 ′ and Y1 ′, a layer C1 ′ in which reinforcing fibers are oriented in the circumferential direction is provided, and the layers J2 ′ and Y are also provided.
On the outside of 2 ', a layer C in which reinforcing fibers are oriented in the circumferential direction.
2'is provided. Further, on the outside of the layer C2 ', a replenishment layer H'is provided in order to set and reinforce an appropriate outer diameter of the parallel joint 12T. The function and effect of the above configuration are the same as those in the case of the large diameter rod tube 10.

【００１５】図４から図８は、請求項３の実施形態例を
説明する図である。図４は、その継合式釣竿の内の、大
径竿管の製法を説明する図である。芯金２０の先部に、
＋４５度方向と、−４５度方向に、夫々指向した炭素繊
維を主体とするシートを重合させたプリプレグＰＨを巻
回する。その外側には、竿管の全長に対応する長さであ
って、強化繊維を円周方向に指向させたプリプレグＰＣ
１を巻回する。その外側には、先部領域Ｌが、図示の如
く、夫々が先細状の三角形状にカット形成された複数個
の三角形要素を巻回方向（円周方向）に並べた形態のプ
リプレグＰＪを巻回する。このプリプレグは、軸長方向
に指向した炭素繊維を主体とし、長さは竿管の全長に対
応する長さのプリプレグである。FIGS. 4 to 8 are views for explaining an embodiment of claim 3. FIG. 4 is a diagram for explaining a method of manufacturing a large diameter rod tube in the joint type fishing rod. At the tip of the cored bar 20,
A prepreg PH obtained by polymerizing a sheet mainly composed of carbon fibers oriented in the +45 degree direction and the −45 degree direction is wound. On the outside, a prepreg PC having a length corresponding to the entire length of the rod tube and having reinforcing fibers oriented in the circumferential direction.
Wind 1. On the outer side thereof, as shown in the drawing, a front region L is wound with a prepreg PJ in a form in which a plurality of triangular elements each formed by cutting in a tapered triangular shape are arranged in the winding direction (circumferential direction). Turn. This prepreg is mainly composed of carbon fibers oriented in the axial direction and has a length corresponding to the entire length of the rod tube.

【００１６】この先部領域Ｌ付近の外側に、前記プリプ
レグＰＨと同様なプリプレグＰＹを巻回する。更にその
外側に、竿管の全長に対応する長さであって、強化繊維
を円周方向に指向させたプリプレグＰＣ２を巻回する。
これを常法に従って加熱成形した大径竿管の、前記先部
領域Ｌの途中位置における横断面を図５に示す。この竿
管の継合部は前記先部領域Ｌを含み、更に、その後方部
所定範囲を含む領域である。A prepreg PY similar to the prepreg PH is wound around the outside of the front region L. Further, a prepreg PC2 having a length corresponding to the entire length of the rod tube and having reinforcing fibers oriented in the circumferential direction is wound around the outer side of the prepreg.
FIG. 5 shows a cross section of a large-diameter rod tube heat-molded by a conventional method at an intermediate position of the tip region L. The joint portion of the rod pipe is a region including the front region L and further including a predetermined rear region thereof.

【００１７】最内層がプリプレグＰＨに対応する補強層
Ｈであり、その外側がプリプレグＰＣ１に対応する円周
方向層Ｃ１である。その外側には、プリプレグＰＪの先
部ＰＪＥに対応する軸長方向層ＪＥと、プリプレグＰＹ
に対応する傾斜方向層Ｙとが円周方向に交互に配設され
ている。この交互の配設間隔は、等間隔であり（この例
では１２０度づつ）、全体として、大径竿管の先部に撓
みの方向性（曲げ剛性の方向性）が出難いように形成し
ている。その外側は、プリプレグＰＣ２に対応する円周
方向層Ｃ２である。The innermost layer is the reinforcing layer H corresponding to the prepreg PH, and the outer side thereof is the circumferential layer C1 corresponding to the prepreg PC1. On the outer side thereof, an axial lengthwise layer JE corresponding to the tip portion PJE of the prepreg PJ and the prepreg PY
And the inclined layers Y corresponding to are alternately arranged in the circumferential direction. The alternating arrangement intervals are equal (in this example, 120 degrees each), and are formed in such a manner that the direction of bending (direction of bending rigidity) is unlikely to occur at the tip of the large diameter rod tube as a whole. ing. The outer side is a circumferential layer C2 corresponding to the prepreg PC2.

【００１８】竿管の成形時には加圧するため、上側に巻
回したプリプレグＰＹがプリプレグＰＪの先部領域Ｌの
カットされている隙間領域に侵入できる。しかし、それ
をより十分に侵入させて、先部肉厚を薄く形成するに
は、プリプレグＰＹに代え、図６に示すようにプリプレ
グＰＪの先部領域Ｌのカットされている隙間領域に合致
させた形状のプリプレグＰＹ”を使用するとよい。Since pressure is applied during the molding of the rod tube, the prepreg PY wound on the upper side can enter the cut gap region of the tip region L of the prepreg PJ. However, in order to make it penetrate more fully to form the front wall thickness thinner, instead of the prepreg PY, as shown in FIG. 6, the prepreg PJ is made to match the cut gap region of the front region L of the prepreg PJ. It is preferable to use a prepreg PY ″ having a curved shape.

【００１９】上記のように構成すれば、大径竿管の先側
継合部の端部側領域、即ち、プリプレグＰＪの先部領域
Ｌに対応する領域は、先端に行くに従って軸長方向指向
の強化繊維が漸次少なくなり、理想的には先端において
丁度無くなる。この軸長方向指向の強化繊維の減少した
部位に代わって、±４５度等の傾斜方向指向の強化繊維
が配設されている構成のため、この領域の曲げ剛性が低
減し、相手側竿管、即ち、小径竿管に対する応力集中が
低減する。また、先端に向かって漸次曲げ剛性が低減し
て、先端において最小となるため、撓みが滑らかになる
と共に、継合状態の継合部端部と、継合領域の直ぐ前の
小径竿管部位の曲げ剛性との剛性差を小さくでき、この
意味で更に撓みが滑らかになる。According to the above-mentioned structure, the end side region of the front joint portion of the large diameter rod pipe, that is, the region corresponding to the front region L of the prepreg PJ, is oriented in the axial direction toward the tip. The number of reinforcing fibers is gradually reduced, and ideally, it is just lost at the tip. Since the reinforcing fibers oriented in the tilt direction of ± 45 degrees or the like are arranged in place of the reduced portion of the reinforcing fibers oriented in the axial direction, the bending rigidity in this region is reduced, and the rod rod on the other side is reduced. That is, stress concentration on the small diameter rod pipe is reduced. Also, since the bending rigidity gradually decreases toward the tip and becomes the minimum at the tip, the bending is smooth, and the joint end in the joined state and the small-diameter rod pipe section immediately before the joining area are provided. The difference in rigidity from the bending rigidity can be reduced, and in this sense, the bending becomes smoother.

【００２０】図７は図５の形態に代わる大径竿管の横断
面であるが、異なるのは軸長方向層ＪＥ’の２箇所と傾
斜方向層Ｙ’の２箇所とが、夫々、円周方向に１８０度
離れて存在することである。曲げ剛性の方向性防止の観
点からは、この例のように、各層ＪＥ’，Ｙ’は、１８
０度離隔した最低２箇所づつは必要である。従って、図
４でいえば、プリプレグＰＪの先部ＰＪＥの三角形要素
は、巻回された状態の３６０度の範囲内に２つ以上（複
数）必要ということである。また、図８に示すように、
図４のプリプレグＰＪに代り、これと類似の２枚のプリ
プレグＰＪ１，ＰＪ２を用い、巻回した状態で図８の重
なり状態のように三角形要素がずれて、円周における三
角形要素の数が増えるように巻回し、３６０度中の必要
な配設数を確保してもよい。FIG. 7 is a cross section of a large-diameter rod tube which is an alternative to the embodiment of FIG. 5, except that two points on the axial length layer JE 'and two points on the inclined layer Y'are circular. They are 180 degrees apart in the circumferential direction. From the viewpoint of preventing the directionality of bending rigidity, each layer JE ′, Y ′ is 18
At least two places separated by 0 degrees are required. Therefore, referring to FIG. 4, two or more (plural) triangular elements of the front portion PJE of the prepreg PJ are required within the 360 ° range of the wound state. Also, as shown in FIG.
Instead of the prepreg PJ of FIG. 4, two similar prepregs PJ1 and PJ2 are used, and the triangular elements are displaced in the wound state as in the overlapping state of FIG. 8, and the number of triangular elements in the circumference increases. Thus, the necessary number of arrangements in 360 degrees may be ensured.

【００２１】図４以降で説明した大径竿管の継合部の構
造は、小径竿管の継合部にも同様に適用できる。The structure of the joint portion of the large-diameter rod tube described with reference to FIG. 4 and after can be similarly applied to the joint portion of the small-diameter rod tube.

【００２２】[0022]

【発明の効果】以上の説明から明らかなように本発明に
よれば、継合領域の端部近くにおける応力集中の防止さ
れた継合式釣竿が提供できる。As is apparent from the above description, according to the present invention, it is possible to provide a joint type fishing rod in which stress concentration is prevented near the end of the joint region.

【図面の簡単な説明】[Brief description of drawings]

【図１】図１は本発明に係る並継式釣竿の縦断面図であ
る。FIG. 1 is a vertical cross-sectional view of a side-by-side fishing rod according to the present invention.

【図２】図２は振出式釣竿の縦断面図である。FIG. 2 is a vertical cross-sectional view of a swing-out type fishing rod.

【図３】図３は図１の要部の拡大図である。FIG. 3 is an enlarged view of a main part of FIG.

【図４】図４は他の継合式釣竿の製法図である。FIG. 4 is a manufacturing diagram of another splicing type fishing rod.

【図５】図５は、図４の方法によって成形された釣竿竿
管の要部横断面図である。5 is a cross-sectional view of a main part of a fishing rod tube formed by the method of FIG.

【図６】図６は図４に代わる他の製法説明図である。FIG. 6 is an explanatory view of another manufacturing method which replaces FIG.

【図７】図７は図５に代わる他の継合式釣竿竿管の横断
面図である。FIG. 7 is a cross-sectional view of another joint type fishing rod tube replaced with FIG.

【図８】図８は図４に代わる他の製法説明図である。FIG. 8 is an explanatory view of another manufacturing method which replaces FIG.

【符号の説明】[Explanation of symbols]

１０ 大径竿管 １０Ｅ 継合部の端部側領域 １０Ｔ 継合部 １２ 小径竿管 １２Ｅ 継合部の端部側領域 １２Ｔ 継合部 ＴＲ 継合領域 10 Large diameter rod tube 10E End-side area of joint 10T splicing section 12 Small diameter rod tube 12E Joint end area 12T splicing section TR splicing area

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 繊維強化樹脂製の大径竿管と小径竿管と
が互いに継ぎ合わされる釣竿であって、大径竿管の継合
部の端部側領域と小径竿管の継合部の端部側領域との少
なくとも何れか一方には、軸長方向強化繊維を主体とす
る層が存在していないことを特徴とする継合式釣竿。1. A fishing rod in which a large-diameter rod pipe and a small-diameter rod pipe made of fiber-reinforced resin are spliced with each other, and an end side region of a joint portion of the large-diameter rod pipe and a joint portion of the small-diameter rod pipe. The joint type fishing rod is characterized in that at least one of the end side regions of the is not provided with a layer mainly composed of axial lengthwise reinforcing fibers. 【請求項２】 継合部端部側領域に軸長方向強化繊維を
主体とする層が存在していない竿管の、残りの継合部領
域から該継合部端部側領域との境界部にまで至っている
軸長方向強化繊維を主体とする第１層と、該第１層の内
方又は外方に設けられ、該継合部端部側領域から離れて
設けられている軸長方向強化繊維を主体とする第２層と
を具備する請求項１記載の継合式釣竿。2. A boundary between a remaining joint region and a joint end-side region of a rod pipe in which a layer mainly composed of axially long direction reinforcing fibers does not exist in the joint end-side region. Layer mainly composed of axially long direction reinforced fibers extending to the portion and axial length provided inside or outside of the first layer and provided away from the joint end side region The joint type fishing rod according to claim 1, further comprising a second layer mainly composed of directional reinforcing fibers. 【請求項３】 繊維強化樹脂製の大径竿管と小径竿管と
が互いに継ぎ合わされる釣竿であって、大径竿管の継合
部と小径竿管の継合部との少なくとも一方の端部側領域
においては、曲げ剛性がその竿管の端に向かって漸減す
ると共に、該端部側領域の横断面では、円周方向におい
て軸長方向強化繊維を主体とする層が存在しない範囲を
有することを特徴とする継合式釣竿。3. A fishing rod in which a large-diameter rod pipe and a small-diameter rod pipe made of fiber reinforced resin are spliced with each other, and at least one of a joint portion of the large-diameter rod pipe and a joint portion of the small-diameter rod pipe is provided. In the end side region, the bending rigidity gradually decreases toward the end of the rod tube, and in the cross section of the end side region, a range in which there is no layer mainly composed of axially long reinforcing fibers in the circumferential direction. A joint type fishing rod characterized by having.