1293020 (1) 玖、發明說明 【發明所屬之技術領域】 本發明是關於使用在釣魚方面的釣竿。詳細來說，是 具有可自由出入主竿的竿根側地連結的延伸竿，可容易地 調整釣竿全體的長度的釣竿。 【先前技術】 一般的釣竿，是以抽出形式或接續形式來將複數的竿 體連結成一支釣竿。來提供配合萁用途具備有各種機能的 各種形式的釣竿。例如，釣香魚用的香魚竿或溪流竿等的 延伸竿，爲了要容易取得釣到的魚，需要具有能在釣魚操 作時儘快變更釣竿的長度的機能。 例如，某種以往的香魚竿，是將其他的延伸竿連結在 主竿的竿根側端部。這種延伸竿，不管是在收容於主竿內 的狀態（收容狀態）、從主竿內抽出到手邊的狀態（延伸 狀態），都可連結固定於主竿。而且，可因應釣魚操作中 的狀況，將延伸竿伸縮來調整釣竿全體的長度來進行釣魚 (例如參照日本專利文獻1 )。具體來說，以往的可調整 釣竿長度的釣竿，在收容狀態，是在主竿的竿根側端部的 內周面與延伸竿的竿根側的周面相互嵌裝的構造。 〔專利文獻1〕 日本實用新案第3 02 2411號公報（第2圖、第3圖） (2) 1293020 【發明內容】 〔發明欲解決的課題〕 可是，·如上述，這種釣竿在釣魚操作期間（特別是香 魚竿是在河川中），因應狀況將延伸竿出入於主竿，所以 在主竿的竿根側或延伸竿的竿根側容易附著髒東西或小石 頭、水。因此，在操作時不能確保足夠的嵌裝力量或者相 反會產生固定的情形。並且反覆使用的話嵌裝力容易降低 〇 本發明的課題，要提供一種釣竿，可以在主竿與延伸 竿之間使釣竿全體的長度變化，且可以該竿體彼此的足夠 的嵌裝力量。 〔用以解決課題的手段〕 第1發明的釣竿，是依序連結筒狀體的複數竿體而成 的釣竿，是具備有：主竿、以及可自由出入於上述主竿內 地連結在主竿的竿根側，不管是收容於主竿內的收容狀態 、或是抽出於主竿的竿根側的延伸狀態，都可固定於主竿 的延伸竿。 該主竿，是具有：作爲主體實施了前端較細的錐桿處 理的筒狀的主體部、以及是可裝卸地連結於主體部的竿根 側，從主竿的竿根側端部插入的管狀構件，其內周面具有 逆錐桿部分的尾栓部。 另一方面，延伸竿，是具有：形成有在前側端部外周 面形成爲較直徑沒有變化的其他部分更大直徑的嵌合公部 -5- (3) 1293020 ，且出入於主竿內的插入部、以及連結於插入部的竿根側 的把手部。主竿的主體部及尾栓部是可嵌裝於嵌合公部。 該釣竿的延伸竿，不管是收容於主竿內的狀態（收容 狀態）、或是從主竿內抽出至手邊的狀態（延伸狀態）， 都可連結固定於主竿。在進行釣魚期間，可將延伸竿從主 竿抽出至手邊成爲延伸狀態，或者可將延伸竿壓入至主竿 內成爲收容狀態，可因應狀況來調整釣竿全體的長度來進 行釣魚。具體來說，在各狀況，主竿與延伸竿是以以下的 方式連結固定。 首先，在收容狀態，從竿根側將延伸竿插入到主竿內 ，延伸竿的前側端部的嵌合公部會嵌裝於主竿的主體部的 軸方向中央附近的內周面。另一方面，在延伸狀態，從主 竿內將延伸竿抽出至竿根側的話，延伸竿的前側端部的嵌 合公部會到達主竿的竿根側端部，嵌裝於管狀的尾栓部的 內周面。 在收容狀態，在主竿的軸方向中央附近內周面嵌裝延 伸竿的嵌合公部，在延伸狀態，也可在主竿的竿根側的內 部嵌合延伸竿的嵌合公部。藉此，再嵌合部分不容易附著 髒東西或水，不容易讓嵌合力降低或產生固定的情形。 第2發明的釣竿，是針對第1發明的釣竿，主竿在其 主體部的軸方向中央附近的內周面形成有直徑沒有變化的 部分。尾栓部在內周面具有越向竿根側直徑越小的逆錐桿 部分。延伸竿的插入部的嵌合公部具有：直徑沒有變化的 部分、與連續於其竿根側越向竿根側直徑越小的逆錐桿部 -6- (4) 1293020 分。而且，主竿的主體部的直徑沒有變化的部分與嵌合公 部的直徑沒有變化的部分可嵌裝在一起’尾栓部的逆錐桿 部分與嵌合公部的逆錐桿部分可嵌裝在一起。 在這種釣竿，在所謂的收容狀態與延伸狀態’藉由使 個別嵌裝的部分不同，則能因應於個別的狀態表現出良好 的嵌裝狀態。即使反覆進行裝卸’也可減低相互嵌裝部分 的惡化程度。 這裡所謂的直徑沒有變化的部分，是在軸方向的一定 範圍直徑沒有變化的部分或是直徑只有極微小的變化的部 分。逆錐桿部分則是代表越向手邊側越小直徑化的錐桿部 〇 第3發明的釣竿，是針對第1或2發明的釣竿，主竿 的尾栓部在竿根側端部內周面具有母螺紋部。延伸竿具有 可螺裝於插入部的竿根側端部外周面的母螺紋部的公螺紋 部。 在這種釣竿，在延伸竿的嵌合公部嵌合於主竿的直徑 沒有變化的部分的收容狀態，並且在想將主竿與延伸竿完 全固定的情況，則使公螺紋部螺裝於母螺紋部。 第4發明的釣竿，是針對第3發明的釣竿，延伸竿在 插入部的竿根側的外周面具有塗裝層，塗裝層是暫時嵌裝 於上述主竿的尾栓部的內周面。 在這種釣竿，插入竿的插入部從主竿的竿根側端部插 入的話’首先，塗裝層會暫時嵌裝於尾栓部的內周面。然 後，因應需要使母螺紋部與公螺紋部螺裝在一起成爲真正 -7- (5) (5)1293020 固定狀態。在進行釣魚的過程，因應狀況分成暫時固定狀 態與真正固定狀態來使用，在真正固定狀態由於嵌裝部分 有兩處所以不容易產生搖晃情形。 第5發明的釣竿，是針對第2或3發明的釣竿，公螺 紋部與母螺紋部是多頭螺紋。 在該釣竿，特別在公螺紋部與母螺紋部利用多頭螺紋 ，則只要稍微使主竿與延伸竿相互旋轉，就可以使公螺紋 部與母螺紋部螺裝在一起。即使在釣完魚要收容釣竿時， 以多頭螺紋就能夠使竿體充分地固定，不會不小心讓延伸 竿從主竿飛出去。 【實施方式】 〔第一實施方式〕 以下針對本發明的第一實施方式參照圖面來加以說明 〇 採用本發明的第一實施方式的釣竿，是使用於釣香魚 方面的釣竿，如第1圖所示，是具有：主竿1、以及可從 主竿1的竿根側自由出入地連結的延伸竿2。而主竿1的 前側，連結著複數的竿體（中竿、前頭細竿等）（沒有圖 示）。這些竿體是將使合成樹脂浸漬在碳纖維等的強化纖 維的預浸漬材料加以焙燒所形成的。 主竿1的更前側的各竿體，是以所謂的抽出形式所連 結的，可從前側竿體依序自由出入於位於竿根側的竿體內 。可分別將位於前側的竿體的竿根側端部外周面嵌裝於鄰 •8- (6) 1293020 接於竿根側的竿體的前側內周面而相互固定。在位於最前 側的前頭細竿的前側端部是配置有釣線卡止具。而主竿！ 與位於其竿根側的延伸竿2，如後述，不管是在延伸狀態 、收容狀態，都可相互連結固定。 (針對主竿】） 主竿1其全體是實施了越向前側越小直徑化的錐桿處 理的筒狀體。在軸方向中央附近的內周面，是設置有部分 其直徑沒有變化的部分（第2圖：參照X範圍）。也就 是說’主竿1，是實施了從前側依序朝向竿根側內徑也會 漸漸擴大的錐桿處理（參照 A範圍）。在其中一部分， 其內徑會部分沒有變化（X範圍）。在連續於X範圍的竿 根側的部分，爲了再配合A範圍的錐度，形成了較大斜 度錐桿部分（B範圍）。該直徑沒有變化的部分，在收容 狀態是與後述的延伸竿2的前側端部嵌裝在一起（參照第 2圖）。 如第3圖所示，在該主竿1的竿根側端部是裝卸自如 地安裝著尾環部3與尾栓部4。 尾環部3，是金屬（鋁合金）製的圓筒型的構件，在 竿根側端部內周面是成爲形成螺紋溝槽的第一母螺紋部分 。主竿1的竿根側端部的外周面，是從竿根側端緣部削掉 一部分凹入，尾環部3的前側是安裝在該凹入部分，讓該 尾環部4覆蓋該凹入部分。此時，尾環部3的外徑是設定 成合乎主竿1的外徑。 -9 - (7) 1293020 尾栓部4是硬質合成樹脂製的圓筒型的構件。前側是 成爲一段外徑小直徑化的插入部分，竿根側端部是成爲一 段大直徑化的頭部分其外徑是合乎上述尾環部3的外徑。 插入部分是從主竿1的竿根側插入到其內部的部分。外周 面是直徑沒有變化的面，內周面是由：越朝竿根側越小直 徑化的逆錐桿部分 '與連續於其竿根側直徑沒有變化的部 分所構成。該尾栓部4的內周面的逆錐桿面，在延伸狀態 是與後述的延伸竿2的前側端部嵌裝著，直徑沒有變化的 部分是在插入狀態與延伸竿嵌裝（參照第3圖）。在插入 部分的竿根側端部的與頭部分的落差部附近，是成爲形成 有與上述尾環部3的第一母螺紋部分螺合的螺紋溝槽的第 一公螺紋部分。而在尾栓部4的竿根側端部內周面（頭部 分的內周），是形成了內徑有一段大直徑化形成螺紋溝槽 的第二母螺紋部分。針對該第二母螺紋部分的螺紋溝槽， 後面會加以敘述。 該尾栓部4，是藉由將第一公螺紋部分螺裝於尾環部 3的第一母螺紋部分，來經由尾環部3可自由裝卸地安裝 在主竿 1。 (針對延伸竿2) 如第4圖所示，延伸竿2，是由：從主竿1的竿根側 插入到其內部的插入部6、以及連結於插入部6的竿根側 的粗直徑的管狀構件的把手部7所構成。 插入部6是可插入於主竿1內的外徑的筒狀體。插入 -10- (8) 1293020 部6，是直徑沒有變化的構造或是實施了越向竿根側越小 直徑化的錐桿處理。該前側端部的外周面，是具有：在軸 方向一定的範圍其外徑較直徑沒有變化的其他部分更大直 徑化的部分（該部分沒有塗裝）、以及連續於其竿根側越 朝竿根側越小直徑化的逆錐桿部分。這裡是成爲嵌合公部 6a (參照第2圖、第3圖）。該嵌合公部6a的直徑沒有 變化的部分的外徑，是設定成配合上述主竿1的直徑沒有 變化的部分X，逆錐桿部分的直徑，則是配合栓部4的逆 錐桿部分的內徑所設定的。 該插入部6，是具有：配置在前側端部的橡膠外殻8 、以及安裝於竿根側端部外周面的螺紋配件9。在鄰接於 螺紋配件9的前側的周面形成了塗料層1 〇。 橡膠外殼8是由習知的彈性橡膠所形成而在軸方向是 中空貫穿的圓筒型的構件。竿根側的外周面是削掉一部分 ，這裡被插入到插入部6的前側端部而以黏接劑加以固定 。橡膠外殼8的前側的內徑，是實施了朝向前側端部擴大 直徑的錐桿處理。由前側的端部起還朝軸方向形成了「裂 紋」。該橡膠外殻8，是在要將以抽出形式連結在主竿1 的前側的中竿等收容於主竿1內時，用來順暢地將中竿導 引至插入部內的構造。 螺紋配件9，是安裝在插入部6的竿根側端部的外周 面（鄰接於把手部7的前側）的環狀的構件。對於插入部 6是以黏接或螺裝等習知的方法來安裝。在螺紋配件9的 外周面形成有多頭螺紋溝槽。多頭螺紋的螺紋寬度或數量 -11 - (9) 1293020 雖然可以任意設定，可是例如螺紋數爲4〜6條左 。並且，該螺紋配件9的導程或螺紋寬度雖然可設 種範圍，而用來進行螺裝的旋轉角最好設定爲50〜 左右，設定在70〜1 1 5度左右更好。該螺紋配件9 螺裝於上述的第二母螺紋部，而設定成預定的旋轉 操作性會較佳。也就是說，藉由多頭螺紋，則既可 要的強度又可減小進行螺裝的旋轉角。在通常的螺 道螺紋）時，到嚼合完成最少需要3 60度的旋轉。 塗料層10，是藉由在插入部6的螺紋配件9 的周面，例如塗敷上聚胺酯塗料所形成的。該塗 ，是塗敷形成爲合乎尾栓部4的直徑沒有變化的部 徑而「不會搖晃」的程度的外徑。 把手部7，是較插入部6更大直徑且是配合主 外周面的直徑的管狀構件。也可以與主竿1或插入 樣地由纖維強化樹脂所構成，也可以由另外的金屬 構成。在插入部6從前側被插入的狀態下，以黏接 式，把手部7，是被連結在插入部6的竿根側端部 部7，即使在將插入部6完全插入的狀態下，或是 部6部分地插入到把手部7的前側端部的狀態都可 (針對主竿1與延伸竿2的連結固定） 該釣竿的延伸竿2，不管是收容於主竿1內的 收容狀態：第2圖、第5圖）、或是從主竿1內抽 邊的狀態（延伸狀態：第3圖），都可連結固定於 右較佳 定在各 150度 雖然是 角則其 維持需 紋（一 的前側 斗層10 分的內 竿1的 部6同 材料來 等的方 。把手 將插入 以0 狀態（ 出至手 主竿1 -12- (10) 1293020 。在進行釣魚的期間，可調整成將延伸竿2從主竿1抽出 至手邊的延伸狀態，或是調整成將延伸竿2壓入至主竿1 內的收容狀態，可因應狀況來調整釣竿全體的長度來進行 釣魚。 如第2圖及第5圖所示，在收容狀態，從竿根側將延 伸竿2插入到主竿1內，延伸竿2的插入部6的前側端部 的嵌合公部6a會到達在前端較細的錐桿中一部分直徑沒 有變化的一部分X，在這裡嵌合公部6a會嵌裝到直徑沒 有變化的部分X。 在這種收容狀態，可以是暫時固定狀態或是真正固定 狀態。也就是說，如果使嵌合公部6a嵌裝在直徑沒有變 化的部分X的話，則插入部6的竿根側端部的塗料層1 〇 也會抵接於尾栓部4的內周面。在該狀態也能充分地將主 竿1與收容竿2相互連結固定（暫時固定狀態）。可是， 爲了要將主竿1與延伸竿2更完全地連結固定，將主竿1 與延伸竿2相互朝向圓周方向轉動，則可使尾栓部4的第 二母螺紋部與螺紋配件9螺裝在一起（真正固定狀態）。 在這真正固定狀態，由於是在兩處相互嵌裝，所以搖晃的 程度會變小。在釣好魚時，不會不小心讓延伸竿2從主竿 1飛出去。 另一方面，如第3圖所示，在延伸狀態，從主竿1內 將延伸竿2從竿根側抽出的話，延伸竿2的插入部6的前 側端部的嵌合公部6a，會到達主竿1的竿根側端部而嵌 裝在管狀的尾栓部4的內周面的逆錐桿部分。 -13- (11) 1293020 如上述，在該釣竿，在收容狀態，在主竿〗的軸方向 中央附近內周面嵌裝著延伸竿2的嵌合公部6a，在延伸 狀態，在主竿1的竿根側的內部嵌合著延伸竿2的嵌合公 部6 a。藉此’當在河川中使用釣竿時，即使將延伸竿2 從主竿1出入’髒東西或水也很難附著於相互的嵌合部分 ，不會讓嵌合力降低或產生固定的情形。 〔其他實施方式〕 也可以提出以下的變形例來取代上述的實施方式。 (a) 如弟6圖所不，在該主竿1，是由其他構件來 構成軸方向中央附近的內周面的直徑沒有變化的部分。也 就是說’將主竿1作成實施了前端較細的錐桿處理的筒狀 體’在主竿1本身沒有形成直徑沒有變化的部分。而替代 的’配置在內周面有直徑沒有變化的部分的管狀的金屬或 合成樹脂製的構件20。該構件，是從主竿1的竿根側插 入在預定的位置藉由黏接材料加以固定。 (b) 如第7圖所示，該延伸竿2，在延伸竿2本身 沒有形成嵌合公部2。是把連結於延伸竿2的前側的橡膠 外殼30作爲嵌合公部。也就是說，將連結於延伸竿2的 前側的橡膠外殻3 0的外周面設定成與延伸竿2的前側相 比設定爲較粗的直徑而朝前側延伸。而使該橡膠外殻3 0 的外周面嵌裝於主竿1的內周面等。 〔發明效果〕 -14-1293020 (1) Description of the Invention [Technical Field of the Invention] The present invention relates to the use of fishing rods for fishing. Specifically, it is an extension which is connected to the root side of the main raft, and can easily adjust the length of the entire fishing rod. [Prior Art] A general fishing rod connects a plurality of corpses into a fishing rod in an extracted form or a continuous form. To provide a variety of fishing rods with various functions for use in conjunction with 萁. For example, in order to easily obtain the fish caught, it is necessary to have the function of changing the length of the fishing rod as soon as possible during the fishing operation. For example, some conventional squid squid is connected to the other end of the main scorpion. This extension 可 can be connected and fixed to the main raft regardless of the state (accommodating state) accommodated in the main raft and the state (extended state) drawn from the main raft to the hand. In addition, it is possible to perform the fishing by adjusting the length of the entire fishing rod in accordance with the situation in the fishing operation (see, for example, Japanese Patent Laid-Open Publication No. Hei. Specifically, in the conventional storage state, the fishing rod having the length of the fishing rod is fitted to the inner peripheral surface of the root end side of the main jaw and the circumferential surface of the root side of the extension weir. [Patent Document 1] Japanese Utility Model No. 3 02 2411 (Fig. 2, Fig. 3) (2) 1293020 [Description of the Invention] [Problems to be Solved by the Invention] However, as described above, the fishing rod is operated in a fishing operation. During the period (especially in the rivers), depending on the situation, the sputum will extend out of the main sputum. Therefore, it is easy to attach dirt or small stones or water to the root side of the main raft or the root side of the raft. Therefore, it is not possible to ensure sufficient embedding force during operation or to cause a fixed situation. Further, if it is used repeatedly, the fitting force is easily lowered. 〇 In the object of the present invention, a fishing rod is provided, and the length of the entire fishing rod can be changed between the main jaw and the extension weir, and sufficient caulking strength of the cartridges can be achieved. [Means for Solving the Problem] The fishing rod according to the first aspect of the invention is a fishing rod in which a plurality of carcasses of the tubular body are sequentially connected, and the fishing rod is provided with a main body and is detachably connected to the main body. The root side of the crucible can be fixed to the extension of the main crucible regardless of the state of being accommodated in the main crucible or the extension of the root side of the main crucible. The main body has a tubular main body portion that is subjected to a tapered tip end treatment as a main body, and a base portion that is detachably coupled to the main body portion, and is inserted from the root end side of the main crucible. The tubular member has an inner peripheral surface having a tail plug portion of the reverse tapered rod portion. On the other hand, the extension 竿 has a fitting portion -5-(3) 1293020 formed with a larger diameter which is formed on the outer peripheral surface of the front end portion to have a smaller diameter than the other portion, and is inserted into the main raft. The insertion portion and the handle portion connected to the root side of the insertion portion. The main body portion and the tail bolt portion of the main body can be fitted into the fitting male portion. The extension of the fishing rod can be connected and fixed to the main raft regardless of whether it is accommodated in the main raft (in a state of being housed) or in a state of being pulled out from the main raft to the hand (extended state). During the fishing period, the extension 竿 can be taken out from the main raft to the hand to be extended, or the extension 竿 can be pushed into the main 成为 to be in a accommodating state, and the length of the entire fishing rod can be adjusted according to the situation to perform fishing. Specifically, in each case, the main 竿 and the extension 连结 are fixed in the following manner. First, in the accommodating state, the extension 竿 is inserted into the main ridge from the root side, and the fitting merging portion of the front end portion of the extension 会 is fitted to the inner circumferential surface near the center of the main body portion of the main shank in the axial direction. On the other hand, in the extended state, when the extension 竿 is pulled out from the main raft to the root side, the fitting male portion of the front end portion of the extension raft reaches the root end portion of the main raft, and is fitted at the end of the tubular shape. The inner peripheral surface of the plug. In the accommodated state, the fitting male portion of the extending cymbal is fitted to the inner peripheral surface of the center of the main cymbal in the axial direction, and in the extended state, the fitting merging portion of the cymbal can be fitted to the inner portion of the shin-root side of the main cymbal. Thereby, the re-mating portion does not easily adhere to dirt or water, and it is not easy to reduce the fitting force or cause the fixation. The fishing rod according to the second aspect of the invention is directed to the fishing rod according to the first aspect of the invention, wherein the main rim has a portion whose diameter does not change in the inner peripheral surface of the main body portion in the vicinity of the center in the axial direction. The tail plug portion has a counter-cone portion having a smaller diameter toward the root side on the inner peripheral surface. The fitting male portion of the insertion portion of the extension ridge has a portion where the diameter does not change, and a reverse cone portion -6-(4) 1293020 which is smaller in diameter toward the root side of the ridge root side. Moreover, the portion of the main body portion whose main body portion has no change in diameter and the portion of the fitting male portion whose diameter does not change may be fitted together. The reverse tapered rod portion of the tail bolt portion and the reverse tapered rod portion of the fitting male portion may be embedded. Packed together. In such a fishing rod, in the so-called accommodating state and the extended state, by making the individual fitting portions different, it is possible to exhibit a good fitting state in accordance with the individual state. Even if the loading and unloading is repeated, the degree of deterioration of the mutually embedded portions can be reduced. Here, the portion where the diameter does not change is a portion where the diameter does not change in a certain range in the axial direction or a portion where the diameter is extremely small. The reverse taper portion is a tapered rod portion which is smaller in diameter toward the hand side. The fishing rod according to the third invention is the fishing rod of the first or second invention, and the tail plug portion of the main jaw is on the inner peripheral surface of the root end side. With a female threaded portion. The extension has a male screw portion that can be screwed to the female screw portion of the outer peripheral surface of the root end portion of the insertion portion. In the fishing rod, the fitting portion of the extension cymbal is fitted into the accommodating state of the portion where the diameter of the main cymbal does not change, and when the main cymbal and the extension cymbal are completely fixed, the male thread portion is screwed to Female threaded part. In the fishing rod according to the third aspect of the invention, the fishing rod of the third aspect of the invention has a coating layer on the outer peripheral surface of the insertion portion, and the coating layer is temporarily fitted to the inner peripheral surface of the tail bolt portion of the main jaw. . In such a fishing rod, when the insertion portion of the insertion cymbal is inserted from the root end portion of the main cymbal' first, the coating layer is temporarily fitted to the inner peripheral surface of the tail plug portion. Then, the female thread portion and the male thread portion are screwed together to form a true -7- (5) (5) 1293020 fixed state. In the process of fishing, the situation is divided into a temporarily fixed state and a truly fixed state. In the true fixed state, since there are two places in the fitting portion, it is not easy to cause a shaking situation. The fishing rod according to the fifth aspect of the invention is the fishing rod according to the second or third aspect of the invention, wherein the male thread portion and the female thread portion are multi-start threads. In the fishing rod, in particular, when the male thread portion and the female thread portion are multi-started, the male thread portion and the female thread portion can be screwed together by slightly rotating the main jaw and the extension thread. Even when the fish is caught to contain the fishing rod, the multi-thread can fully secure the carcass without accidentally letting the extension fly out of the main raft. [Embodiment] [First Embodiment] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings, and a fishing rod according to a first embodiment of the present invention is used for a fishing rod for fishing a fish, as shown in Fig. 1. As shown in the figure, the main crucible 1 and the extension crucible 2 that can be freely connected from the root side of the main crucible 1 are provided. On the front side of the main raft 1, a plurality of corpses (the middle cymbals, the front cymbals, etc.) are connected (not shown). These steroids are formed by baking a prepreg material in which a synthetic resin is impregnated with a reinforcing fiber such as carbon fiber. The corpus callosum of the anterior side of the main iliac crest 1 is connected in a so-called withdrawal form, and can be freely inserted and exited from the anterior humeral body into the iliac crest located on the iliac crest side. The outer peripheral surface of the root end side of the corpus callosum on the front side may be fitted to the front inner peripheral surface of the scorpion body adjacent to the root side of the base to be fixed to each other. A line catcher is disposed at the front end of the front end of the front end. And the Lord! The extension ridges 2 located on the root side of the ridge can be connected and fixed to each other, as will be described later, in the extended state and the accommodating state. (Target main body) The main body 1 is a cylindrical body that has been subjected to a tapered rod that has a smaller diameter toward the front side. The inner peripheral surface in the vicinity of the center in the axial direction is provided with a portion where the diameter does not change (Fig. 2: reference X range). In other words, the main cymbal 1 is a cone-rod treatment in which the inner diameter gradually increases toward the root side from the front side (see the A range). In some of them, there is no change in the inner diameter (X range). In the portion of the root side continuous to the X range, in order to recombine the taper of the A range, a large tapered taper portion (B range) is formed. The portion where the diameter does not change is fitted to the front end portion of the extension 竿 2 to be described later in the accommodation state (see Fig. 2). As shown in Fig. 3, the tail ring portion 3 and the tail plug portion 4 are detachably attached to the root end portion of the main cymbal 1. The tail ring portion 3 is a cylindrical member made of metal (aluminum alloy), and the inner peripheral surface of the root end portion is a first female screw portion that forms a screw groove. The outer peripheral surface of the root end portion of the main cymbal 1 is partially recessed from the rim root end edge portion, and the front side of the tail ring portion 3 is attached to the concave portion, so that the tail ring portion 4 covers the concave portion. Into the section. At this time, the outer diameter of the tail ring portion 3 is set to be the outer diameter of the main rim 1. -9 - (7) 1293020 The tail plug portion 4 is a cylindrical member made of a hard synthetic resin. The front side is an insertion portion having a small diameter outer diameter, and the root end portion is a portion having a large diameter and the outer diameter thereof is an outer diameter of the tail ring portion 3 as described above. The insertion portion is a portion that is inserted into the inside from the root side of the main crucible 1. The outer peripheral surface is a surface having no change in diameter, and the inner peripheral surface is composed of a portion of the reverse tapered rod portion which is smaller in diameter toward the root side of the root, and a portion which does not change in diameter continuously from the root side of the root. The reverse tapered surface of the inner peripheral surface of the tail plug portion 4 is fitted to the front end portion of the extension 竿 2 to be described later in the extended state, and the portion where the diameter does not change is inserted in the inserted state and the extension 竿 (refer to the 3)). In the vicinity of the falling portion of the root end portion of the insertion portion and the head portion, a first male screw portion is formed which is formed with a thread groove which is screwed to the first female screw portion of the tail ring portion 3. On the inner peripheral surface (the inner circumference of the head portion) of the root end portion of the tail plug portion 4, a second female thread portion having a large diameter to form a thread groove is formed. The thread groove for the second female thread portion will be described later. The tail plug portion 4 is detachably attached to the main cymbal 1 via the tail ring portion 3 by screwing the first male screw portion to the first female screw portion of the tail ring portion 3. (For the extension 竿 2) As shown in Fig. 4, the extension 竿 2 is composed of an insertion portion 6 inserted from the root side of the main raft 1 into the inside thereof, and a large diameter connected to the root side of the insertion portion 6. The handle portion 7 of the tubular member is constructed. The insertion portion 6 is a cylindrical body that can be inserted into the outer diameter of the main jaw 1 . Insert -10- (8) 1293020 Part 6, which is a structure with no change in diameter or a tapered rod that has a smaller diameter toward the root side. The outer peripheral surface of the front end portion has a portion having a larger diameter than the other portion whose diameter is not changed in the axial direction in a certain range in the axial direction (the portion is not coated), and the continuous side of the root portion thereof The smaller the diameter of the counter-cone portion on the root side. This is the fitting of the fitting 6a (see Fig. 2 and Fig. 3). The outer diameter of the portion of the fitting male portion 6a whose diameter does not change is a portion X that is set to match the diameter of the main crucible 1 and the diameter of the counter-cone portion is the counter-cone portion of the conical portion 4. The inner diameter is set. The insertion portion 6 has a rubber case 8 disposed at the front end portion and a screw fitting 9 attached to the outer peripheral surface of the root end portion. A coating layer 1 形成 is formed on the circumferential surface adjacent to the front side of the threaded fitting 9. The rubber outer casing 8 is a cylindrical member formed of a conventional elastic rubber and penetrating in the axial direction. The outer peripheral surface of the root side is a portion that has been cut off, and is inserted into the front end portion of the insertion portion 6 to be fixed by an adhesive. The inner diameter of the front side of the rubber casing 8 is a taper rod process in which the diameter is increased toward the front end portion. From the end of the front side, a "crack" is formed in the axial direction. The rubber casing 8 is configured to smoothly guide the center raft into the insertion portion when the middle cymbal or the like which is connected to the front side of the main cymbal 1 in a withdrawal manner is housed in the main cymbal 1. The threaded fitting 9 is an annular member attached to the outer peripheral surface of the insertion portion 6 at the root end portion (adjacent to the front side of the handle portion 7). The insertion portion 6 is attached by a conventional method such as bonding or screwing. A plurality of thread grooves are formed on the outer peripheral surface of the threaded fitting 9. Thread width or number of multi-start threads -11 - (9) 1293020 Although it can be set arbitrarily, for example, the number of threads is 4~6 left. Further, although the lead or the thread width of the screw fitting 9 can be set in a range, the rotation angle for screwing is preferably set to about 50 to about, and it is preferably set to about 70 to 1 15 degrees. The threaded fitting 9 is screwed to the second female thread portion described above, and is set to have a predetermined rotational operability. That is to say, with a multi-start thread, both the strength and the angle of rotation of the screwing can be reduced. At the usual thread threads, a minimum of 3 60 degrees of rotation is required to complete the chewing. The coating layer 10 is formed by, for example, applying a polyurethane coating on the circumferential surface of the screw fitting 9 of the insertion portion 6. This coating is applied to an outer diameter which is formed so as not to be "shake" in conformity with the diameter of the tail plug portion 4 which does not change. The handle portion 7 is a tubular member having a larger diameter than the insertion portion 6 and matching the diameter of the main outer peripheral surface. It may be composed of a fiber-reinforced resin or a metal or a plug-in, or may be made of another metal. In a state in which the insertion portion 6 is inserted from the front side, the handle portion 7 is coupled to the root end portion 7 of the insertion portion 6 in a state in which the insertion portion 6 is completely inserted, or The state in which the portion 6 is partially inserted into the front end portion of the handle portion 7 (fixed and fixed to the connection between the main raft 1 and the extension 竿 2) is an extension 竿 2 of the fishing rod, regardless of the accommodating state accommodated in the main raft 1: Fig. 2, Fig. 5), or the state of drawing from the main cymbal 1 (extended state: Fig. 3), all of which can be connected and fixed to the right, preferably at 150 degrees, although the angle is maintained. (The front part of the front side of the bucket layer 10 is the same as the material of the part 6 of the inner side. The handle will be inserted in the 0 state (out to the hand main 1 -12- (10) 1293020. During the fishing period, It is adjusted to extend the extension 竿 2 from the main 竿 1 to the hand, or to adjust the 竿 2 to the accommodating state of the main 竿 1 , and adjust the length of the entire fishing rod according to the situation to perform fishing. As shown in Fig. 2 and Fig. 5, in the housing state, the extension 竿 2 is inserted into the main cymbal 1 from the root side. The fitting male portion 6a of the front end portion of the insertion portion 6 of the extension 竿 2 reaches a portion X of which a part of the diameter of the tapered rod at the front end is not changed, where the fitting male portion 6a is fitted to the diameter without change. Part X. In this accommodation state, it may be a temporarily fixed state or a truly fixed state. That is, if the fitting male portion 6a is fitted in the portion X whose diameter is not changed, the root side of the insertion portion 6 The coating layer 1 of the end portion also abuts against the inner peripheral surface of the tail plug portion 4. In this state, the main jaw 1 and the housing cassette 2 can be sufficiently fixed to each other (temporarily fixed state). However, in order to The main jaw 1 is more completely fixedly coupled to the extension jaw 2, and the main jaw 1 and the extension jaw 2 are rotated toward each other in the circumferential direction, so that the second female thread portion of the tail bolt portion 4 can be screwed together with the threaded fitting 9 (true Fixed state). In this truly fixed state, since it is embedded in two places, the degree of shaking will become smaller. When the fish is caught, the extension 竿 2 will not accidentally fly out from the main raft 1. Aspect, as shown in Figure 3, in the extended state, from When the extension 竿 2 is pulled out from the root side of the main raft 1 , the fitting male portion 6 a of the front end portion of the insertion portion 6 of the 竿 2 extends to the root end portion of the main raft 1 and is fitted in the tubular shape. The reverse tapered rod portion of the inner peripheral surface of the tail plug portion 4. -13- (11) 1293020 As described above, in the fishing rod, the inner peripheral surface of the main shaft is embedded with the extension 竿 2 in the accommodation state. In the extended state, the fitting portion 6a of the extension 竿 2 is fitted to the inside of the root side of the main cymbal 1 in the extended state. Thus, when the fishing rod is used in the river, even if the fishing rod is used, 2 It is difficult for the dirty matter or the water to adhere to the fitting parts from the main cymbal 1 and the fitting force is not lowered or fixed. [Other Embodiments] The following modifications may be proposed instead of the above. Implementation. (a) As shown in Fig. 6, the main cymbal 1 is a portion in which the diameter of the inner peripheral surface in the vicinity of the center in the axial direction is not changed by other members. That is to say, the main body 1 is made into a cylindrical body which has been subjected to a tapered rod tip treatment, and the main crucible 1 itself does not have a portion where the diameter does not change. On the other hand, there is a tubular metal or synthetic resin member 20 having a portion having no diameter change on the inner peripheral surface. This member is inserted from the root side of the main crucible 1 and fixed at a predetermined position by an adhesive material. (b) As shown in Fig. 7, the extension 竿 2 does not form the fitting metric 2 itself in the extension 竿 2 itself. The rubber casing 30 attached to the front side of the extension 竿 2 is used as a fitting male portion. In other words, the outer peripheral surface of the rubber casing 30 connected to the front side of the extension 竿 2 is set to have a relatively large diameter and extend toward the front side in comparison with the front side of the extension 竿2. The outer circumferential surface of the rubber casing 30 is fitted to the inner circumferential surface of the main crucible 1 or the like. [Effect of the invention] -14-