1293019 (1) 玖、發明說明 【發明所屬的技術領域】 本發明是關於釣竿，特別是關於可在將竿前側的竿體 收容於竿根側的竿體內的收容狀態加以固定的抽出式的釣 竿。 【先前技術】1293019 (1) 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽 抽. [Prior Art]
以往眾所皆知有可抽出地收容複數的竿體的抽出竿。 這種抽出竿，是由直徑相異的複數支竿體所構成，越靠近 竿根側的竿體的直徑越大，竿前側的竿體可插入到竿根側 的竿體內部。可以將前側的竿體依序插入到竿根側的竿體 (所謂的主竿）而成爲緊湊化的狀態。而連續於主竿的竿前 側的竿體，也就是從主竿起算的第二支的竿體，一般稱作 主上竿。In the past, it has been known that there is a withdrawal of a plurality of carcasses that can be taken out. This extraction raft is composed of a plurality of scorpions having different diameters. The larger the diameter of the corpus callosum near the root side, the corpus callosum on the anterior side of the iliac crest can be inserted into the corpus callosum. The corpus callosum of the front side can be sequentially inserted into the corpus callosum on the root side (so-called main sputum) to be in a compact state. The corpus callosum, which is continuous on the anterior side of the main iliac crest, that is, the corpus callosum from the main sac, is generally called the main sac.
另一方面’在釣魚時，是將所收容的各竿體從主竿的 竿前側端部依序抽出使用，可是此時，藉由讓各竿體的竿 根側端部的內周面嵌合於所連續的竿體的前側端部的外周 面，讓各竿體不會脫落，因此，可使用從主竿至前頭細竿 一直線連結的狀態的抽出竿。 在這種抽出竿，也有要依狀況來變更使用長度的釣 竿。這就是採用了所謂的伸縮機構的伸縮式的抽出竿，例 如，在將主上竿插入到主竿的狀態，在一般的將主上竿的 幾乎所有長度插入到主竿內的稱作收容狀態的狀態，主上 竿的竿根側端部是與主竿的竿根側端部嵌合，藉由摩擦阻 -4- 1293019 (2) 力來保持該狀態。於是，在將主上竿從主竿完全抽出的狀 態（稱作延伸狀態）且加以固定之外，在收容狀態也可以加 以固定’所以釣者可利用這兩個固定狀態因應釣竿的使用 長度的狀況來進行釣魚（例如，參照專利文獻1)。 〔專利文獻1〕 曰本特開平8— 266194號公報 【發明內容】 〔發明欲解決的課題〕 可是，以往的伸縮式的釣竿，如上述，是採用在收容 狀態是藉由主竿與主上竿兩者的摩擦阻力來加以固定的構 造’在製造時，是要求能得到適當的嵌合狀態的嚴格的尺 寸調整’由於該調整作業很繁雜，所以會要讓製造成本上 升的問題。由於是使用鉸刀所以容易讓嵌合面變粗，難得 到順暢的嵌合狀態。並且，藉由兩者的尺寸精度所產生的 摩擦阻力以獲得嵌合力的構造，在由於長期使用產生磨損 而尺寸精度惡化的結果，會具有潛在性的嵌合狀態（嵌合 力）容易變化的問題。 本發明，鑒於這種情況，其課題爲，要提供一種釣 竿，在製造時不需要嚴格的尺寸管理，能夠順暢地進行收 容操作，在收容狀態能穩定地固定竿前側的竿體與竿根側 的竿體，並且能長期使用。 1293019 (3) 〔用以解決課題的手段〕 爲了解決上述課題，本發明的釣竿，具備有：竿根側 的竿體1、可抽出地插入到該竿根側的竿體1的竿前側的 竿體2、以及藉由相互嵌合而在將竿前側的竿體2收容於 竿根側的竿體1內的收容狀態可加以固定的公嵌合部3與 母嵌合部4之釣竿，上述嵌合部3、4的至少其中一方， 是具備有對應於另一方的嵌合部而可朝直徑方向彈性變形 的可動部4 1。 藉由這種釣竿，藉由讓公嵌合部3與母嵌合部4嵌合 而在收容狀態可固定竿根側的竿體1與竿前側的竿體2。 此時，即使公嵌合部3與母嵌合部4有些許尺寸誤差，而 設置在其中一方的嵌合部的可動部41能配合另一方的嵌 合部朝直徑方向彈性變形，則能夠確實且順暢地使兩嵌合 部3、4嵌合在一起。藉由將母嵌合部4形成爲小於公嵌 合部3，則能使可動部4 1積極地彈性變形，藉由該可動 部41的彈力而從直徑方向朝另一方的嵌合部產生固定力 量，則能夠在嵌合狀態確實且穩定地固定兩嵌合部3、 4，並不依賴兩者的尺寸精度，而是積極利用直徑方向的 彈性變形，所以即使因爲使用造成磨損，嵌合狀態也不易 變化，能維持穩定的嵌合力。 本發明的釣竿，可動部41，是作成在直徑方向具有 可撓性。 藉由這種釣竿，當使竿前側的竿體2朝軸方向移動而 收容於竿根側的竿體1內時，可動部4 1會朝直徑方向撓 -6- 1293019 (4) 曲。也就是說，在母嵌合部4小於公嵌合部3時，可動部 4 1，伴隨著公嵌合部3的移動，不會朝軸方向彈性變形， 而會朝直徑方向彈性變形。 本發明的釣竿，上述可動部4 1，是配置成環狀且朝 軸方向延伸的複數的可撓片。 藉由這種釣竿，在兩嵌合部3、4成爲嵌合狀態時， 朝直徑方向撓曲的複數的可動部41的彈力會作用在另一 方的嵌合部的圓周方向整周，而能以穩定的狀態來使兩嵌 合部3、4嵌合。 本發明的釣竿，具備有朝向讓兩嵌合部3、4的固定 力變大的方向的用來彈壓可動部41的彈壓構件6。 藉由這種釣竿，由於兩嵌合部3、4的固定力會再變 大，所以在收容狀態可以將竿根側的竿體1與竿前側的竿 體2堅固地加以固定。 具備有與上述各可動部41同軸心配置而朝向讓兩嵌 合部3、4的固定力變大的方向的用來彈壓各可動部41的 環狀的彈壓構件5。 藉此，在收容狀態可以將竿根側的竿體1與竿前側的 竿體2堅固地加以固定。 【實施方式】 以下參照圖面來說明本發明的第一實施方式。第1圖 及第2圖，是槪略地顯示本發明的釣竿的竿根側的預定區 域的剖面圖，第1圖，是將主上竿2以最大限度插入到主 1293019 (5) 竿1的所謂的收容狀態，第2圖是顯示從收容狀態將主上 竿2朝前側拉出預定量的狀態。如第1圖及第2圖所示， 主上竿2，是可抽出地被插入到主竿1，是相對於主竿1 可自由伸縮，在本實施方式中，主上竿2是相當於竿前側 的竿體，主竿1是相當於竿根側的竿體。而雖然沒有圖 不’而在主上千2的內部’是可抽出地依序插入一支以上 的竿體。這些竿體，在從主上竿2抽出時，一般來說位於 最前側的稱作前頭細竿，而位在該前頭細竿與主上竿之間 的稱作中竿。 上述主竿1與主上竿2，是形成爲朝向前側小直徑化 的前端較細的錐桿狀，藉由將主上竿2形成爲較主竿1的 直徑更小，來將主上竿2收容於主竿1的內部。而主竿i 的竿前側端部的內周面是形成爲較主上竿2的竿根側端部 的外周面的直徑更小。於是，將主上竿2以最大限度從主 竿1的竿前側端部抽出的所謂的延伸狀態，藉由讓竿前側 端部的內周面與主上竿2的竿根側端部外周面嵌合，在延 伸狀態來固定主竿1與主上竿2。主竿1及主上竿2，是 使用將合成樹脂浸漬在碳纖維或玻璃纖維等的強化纖維的 預浸漬材料所成型的，且使其硬化而加以焙燒所形成的。 本第一實施方式的釣竿，如第1圖及第2圖所示，是 設置有藉由互相嵌合而可在收容狀態固定主竿1與主上竿 2的尾栓部（公嵌合部）3與主上尾栓部（母嵌合部）4。尾栓 部3 ’是被安裝在主竿丨的竿根側端部，並且主上尾栓部 4 疋:被女衣在主上千2的干根側觸部’將主上竿2收容 -8- 1293019 (6) 到主竿1的話，主上尾栓部4與尾栓部3會互相嵌合（尾 栓部3嵌入到主上尾栓部4)，會在收容狀態固定住主竿1 與主上竿2。（參照第1圖） 上述尾栓部3，是可裝卸地螺合在主竿1的竿根側端 部的內周面所形成的母螺紋部1 〇，是設置成封閉住該主 竿1的竿根側端部的開口。尾栓部3，是具備有：螺裝於 上述母螺紋部1〇的尾栓主體30、以及由橡膠或金屬或合 成樹脂等所構成，安裝在該尾栓主體30的蓋子31，在安 裝於主竿1時，藉由讓蓋子3 1朝向竿根側露出於外部來 保護主竿1的竿根側端部。 尾栓主體30，是具備有：圓盤狀的基座35、從該基 座3 5的周緣朝向竿前側突出設置的螺合部3 3、以及在該 螺合部3 3的內側從基座3 5朝向竿前側突出設置的嵌合突 起34。 上述螺合部33，是形成爲圓筒狀，在其外周面形成 有與上述母螺紋部1 0螺合的公螺紋部3 2。嵌合突起3 4， 是形成爲圓筒狀，是配置成與上述螺合部3 3同軸心。於 是，在將尾栓部3安裝於主竿1時，嵌合突部34的軸線 與主竿1的軸線會在同軸上。而嵌合突部34，其直徑是 設定成主竿1的竿根側端部的內徑的大約1 /2的尺寸，其 前端部（竿前側端部）的外周面是形成爲前端較細的錐桿 狀。 主上尾栓部4，是螺裝在主上竿2的竿根側端部的內 周面所形成的母螺紋部20，藉由與上述尾栓部3嵌合， -9- 1293019 (7) 而可配合尾栓部3的形狀朝直徑方向彈性變形。詳細說明 的話，主上尾栓部4，是具備有：略圓筒狀的外壁部40、 配置在該外壁部40的內側的複數的可動部4 1、以及用來 連結外壁部40與可動部4 1的個別的竿前側端部的連結部 42 〇 上述外壁部40，其外徑是形成爲與主上竿2的竿前 側端部的外徑大略相同，在竿前側的外周面形成有公螺紋 部44。該公螺紋部44，是藉由與上述母螺紋部20螺合而 可裝卸地安裝在主上竿2的竿根側端部。 上述可動部4 1，是中介著預定的環狀間隙環狀地配 置在外壁部40的內側而與外壁部40同軸心。詳細來說’ 可動部41，如第3圖及第4圖所示，是被形成在朝軸方 向延伸的複數的可撓片，藉由可動部41形成了可讓上述 嵌合突部34插入的圓柱狀的插入空間46。換言之，可動 部4 1，是藉由朝軸方向延伸的細縫部4 5將圓筒狀的筒體 在圓周方向切斷而形成爲朝軸方向延伸的可撓片，其直徑 方向剖面是形成爲扇形。在第一實施方式的細縫部4 5， 是在直徑方向隔著相等的間隔設置在四個位置，藉此，可 動部41，是形成爲合計四個。而可動部41的圓周方向的 長度，是形成爲較細縫部45的圓周方向的長度更長的尺 寸。而可動部41與嵌合突部34，其軸方向的長度是形成 爲大略相同，其長度是設定爲較嵌合突部34的外徑更 長。 可動部4 1，是將連結部4 2作爲支點，在直徑方向具 -10- 1293019 (8) 有可撓性，嵌合突部34插入到上述插入空間46時，會朝 直徑方向彈性變形。詳細來說，藉由可動部4 1所形成的 插入空間46的直徑（以下稱作可動部41的內徑）之中，至 少前端部（竿根側端部）的直徑，是形成爲稍微小於嵌合突 部3 4的外徑。也就是說，藉由將嵌合突部3 4插入到主上 尾栓部4的插入空間4 6，讓可動部4 1可朝直徑外側方向 彈性變形。詳細來說，如第1圖或第2圖所示，該可動部 41的內徑，是以：形成爲稍小於嵌合突部3 4的外徑的小 直徑部4 1 a、以及形成爲稍大於嵌合突部3 4的外徑的大 直徑部4 1 b所構成，小直徑部4 1 a，是被置在大直徑部 4 1 b的竿根側。也就是說，可動部4 1的前端部成爲了小 直徑部4 1 a。而可動部4 1，是作成藉由讓小直徑部4丨a與 嵌合突部34嵌合而可朝直徑方向撓曲。而小直徑部41a 的軸方向的長度，最好設定成較大直徑部41b稍短的尺 寸。 具體來說，例如將嵌合突部3 4的外徑形成爲1 2 · 5mm時，則將可動部41的小直徑部41a的內徑形成爲 12· 3mm。可動部41的前端部的內徑最好設定成嵌合突 部3 4的外徑的9 8 · 4 %程度的長度尺寸。 可動部4 1的前端部，是較外壁部4 〇更稍微朝向竿根 側延伸’當將主上竿2插入到主竿1內時，藉由讓可動部 4 1的前端部抵接於尾栓部3所設置的環狀的緩衝橡膠 3 6 ’則可進行主上竿2在收容狀態的定位。 關於尾栓主體30與主上尾栓部4的材質，兩者一般 • 11 - 1293019 (9) 是用合成樹脂（特別是滑動性佳的合成樹脂）所構成。作爲 合成樹脂是使用ABS或PBT(聚對苯二甲酸丁二醇酯）。 詳細來說，在尾栓主體30，是使用PC/ABS類聚合物 合金、或含有玻璃的PBT等。含有玻璃的PBT的玻璃含 有率最好是20%〜30%，特別是最好含有30%的玻璃纖 維，含有20%的玻璃珠。 在主上尾栓部4，除了使用於尾栓部主體3 0的上述 構造之外，例如也使用PC。 尾栓部主體30與主上尾栓部4的各材質的組合也是 隨意的，可將兩者作成同種材料或不同材料。例如’在尾 栓部主體30與主上尾栓部4的雙方，都使用PC/ABS類 聚合物合金（例如日本帝人化成公司製的商品名 MARUTHIRON)、或者在雙方都使用含有30%的玻璃纖維 的 PBT。 而也可以在尾栓部主體30或主上尾栓部4實施鍍覆 處理。最好是鍍上Ni— Ni— Cr。而在尾栓主體實施鍍覆 處理時，也可以只在上述嵌合突起34不實施鍍覆處理。 在主上尾栓部4，是設置有彈壓構件5。該彈壓構件 5是形成爲環狀，其內徑是設定爲較可動部41的前端部 (小直徑部4 1 a)的外徑稍小的尺寸，並且其軸方向長度是 形成爲與小直徑部4 1 a的長度大略相同’是外嵌安裝在小 直徑部4 1 a外周。也就是說，藉由彈壓構件5，是將可動 部41朝直徑內側方向彈壓，小直徑部41 a的內徑’是形 成爲小於嵌合突部34的外徑。具體來說’藉由設置彈壓 -12- 1293019 (10) 構件5而讓小直徑部41 a的內徑是設定成n . 8mm的尺 寸。也就是說，藉由彈壓構件5來將小直徑部4 1 a的內徑 尺寸設定爲嵌合突部34的外徑的94 · 4%左右的長度。 彈壓構件5，是以天然橡膠或合成橡膠等所形成，最 好是以矽膠形成。而彈壓構件5，最好是可自由裝卸地安 裝在主上尾栓部4。 在主上尾栓部4的竿前側，是設置有略圓盤狀的橡膠 座43。該橡膠座43，其外徑是形成爲與主上竿2的竿根 側端部的內徑大略相同，是藉由外橡膠座43封閉住主上 竿2的竿根側端部。當將上述中竿或前頭細竿收容於主竿 1內時，藉由讓這些竿根側端部抵接而成爲緩衝構造。 第一實施方式的釣竿，如上述所示從延伸狀態變成收 容狀態時，藉由將尾栓部3的嵌合突部34插入到主上尾 栓部4的可動部41的內部空間，讓尾栓部3與主上尾栓 部4嵌合而在收容狀態固定主竿1與主上竿2。此時，由 於可動部4 1可朝直徑方向彈性變形，所以即使嵌合突部 3 4的外徑尺寸與可動部4 1的內徑（插入空間4 6的外徑）尺 寸有些許的誤差，使尾栓部3與主上尾栓部4嵌合，則可 以在收容狀態固定主竿1與主上竿2。如上述藉由將可動 部4 1的小直徑部4 1 a的內徑作成小於嵌合突部3 4的外 徑，在嵌合狀態，可動部4 1會朝直徑外側方向撓曲，而 藉由該可動部41的彈性而產生尾栓部3與主上尾栓部4 的固定力，所以可以在收容狀態確實地固定主竿1與主上 竿2。由於是積極利用直徑方向的彈性變形來進行嵌合的 -13- 1293019 (11) 構造’所以在收容操作也可順暢地進行，並且即使因爲長 期使用造成磨損’兩者的嵌合狀態也不會改變，可得到長 期穩定的固定力量。 可動部4 1是形成爲由合成樹脂所構成且朝軸方向延 伸的可撓片，所以在嵌入嵌合突部34時，不會因爲可動 部41與嵌合突部34的摩擦而朝軸方向撓曲，只會朝直徑 方向彈性變形’所以可容易地將尾栓部3插入到主上尾栓 部4。 藉由以小直徑部4 1 a與大直徑部4 1 b來形成可動部 41，並且在軸方向將小直徑部41a的尺寸設定成較大直徑 部41b的尺寸更短，來縮小嵌合突部34與可動部41的接 觸面積，而能夠減少插入時的摩擦阻力。 並且，在主上尾栓部4，設置有將可動部41朝向直 徑內側方向彈壓的彈壓構件5，所以能夠更增加尾栓部3 與主上尾栓部4的固定力量。也就是說，在尾栓部3與主 上尾栓部4成爲嵌合狀態時，藉由彈壓構件5會更增加可 動部4 1朝向直徑內側方向的彈力，所以可以在收容狀態 更確實地固定主竿1與主上竿2。 如果將該彈壓構件5相對於主上尾栓部4設置成可裝 卸的話，在因爲長期使用而彈壓構件5隨著時間變化而惡 化的情況，藉由將該彈壓構件5換新則能夠回復尾栓部3 與主上尾栓部4的固定力量。如果準備彈性係數不同的複 數的彈壓構件5，則可調節固定力量而因應釣者的喜好而 得到所需強度的固定力。 -14- 1293019 (12) 尾栓部3及主上尾栓部4，由於是分別螺裝於 與主上竿2，所以當嵌合突部34及可動部41產 時，也可以將尾栓部3及主上尾栓部4進行交換。 在第一實施方式中，是讓分別設置在主竿1與 2的各竿根側端部的尾栓部3與主上尾栓部4嵌 起，所以收容狀態，主上竿2能以最大限度插入 1。可以將竿體的使用長度作成主竿1的略全長的 伸縮構造的效率很好。 接下來，參照第5圖來說明本發明的釣竿的第 方式。在第5圖中，針對與第1圖所示的實施方式 構造，附上相同的圖號且省略詳細的說明。本第二 式，其主上尾栓部6的構造與第1圖所示的第一實 不同。 主上尾栓部6，如第5圖所示，是具備有：略 的外壁部60、以及經由預定的環狀間隙配置在該 6 0的內側的複數的可動部6 1，藉由可動部6 1形成 嵌合突部34插入的圓柱狀的插入空間。外壁部60 部6 1，在個別的竿前側端部是藉由連結部62所連 動部6 1，是將竿根側端部作爲支點形成爲可朝直 彈性變形。 上述外壁部60的竿前側端部的外周部，形成 上竿2的竿根側端部所形成的母螺紋部2 0螺合的 部64，而被螺裝於主上竿2的竿根側端部。 可動部6 1的內徑（插入空間的直徑），是以： 主竿1 生磨損 主上竿 合在一 到主竿 變更， 二實施 相同的 實施方 施方式 圓筒狀 外壁部 了可讓 與可動 結，可 徑方向 有與主 公螺紋 形成爲 -15- 1293019 (13) 稍小於嵌合突部3 4的外徑的小直徑部6 1 a、以及形成爲 稍大於嵌合突部34的外徑的大直徑部61b所構成’小直 徑部6 1 a，是被置在大直徑部6 1 b的竿根側。也就是說’ 可動部6 1的基端部（竿根側端部)成爲了小直徑部6 1 a。而 可動部6 1，是作成藉由讓小直徑部6 1 a與嵌合突部34嵌 合而可朝直徑方向撓曲。而小直徑部61a的軸方向的長 度，最好設定成較大直徑部6 1 b稍短的尺寸。 在主上尾栓部6的竿前側端部，是設置有略圓盤狀的 橡膠座63，在該橡膠座63突出設置有朝向竿根側的略環 狀的彈壓構件65。也就是說，橡膠座63與彈壓構件65 是一體成型。彈壓構件65的內徑，是形成爲稍小於可動 部61的前端部（大直徑部61b)的外徑，是作成將各可動部 6 1朝直徑內側方向彈壓。橡膠座63及彈壓構件65，是以 天然橡膠或合成橡膠等所形成，最好是以矽膠形成。 藉由本第二實施方式的釣竿，與上述同樣的，嵌合突 部3 4被插入到藉由可動部6 1所形成的插入空間時，可動 部6 1會朝直徑外側方向彈性變形，則容易使尾栓部3與 主上尾栓部4嵌合，可在收容狀態確實地固定主竿i與主 上竿2。由於彈壓構件65與橡膠座63是一體成型，所以 與上述第一實施方式相比是減少了零件數量，而能夠容易 進行組裝。 本發明的釣竿，並不限定於上述的實施方式，只要不 脫離本發明的主旨則可在範圍內進行種種變更。例如，& 第一及第二實施方式，可動部41、61雖然是設置在主上 -16- 1293019 (14) 尾栓部4，而也可以設置在尾栓部3。具體來說，例如， 藉由在嵌合突部34設置朝軸方向延伸的複數的細縫部， 作成朝軸方向延伸的可撓片（可動部）也可以。藉此，由於 嵌合突部3 4可朝直徑內側方向彈性變形，所以即使尺寸 有些許的誤差，也能夠使尾栓部3與主上尾栓部3容易嵌 合。尾栓部3與主上尾栓部4其中一方，也可具備有可朝 直徑方向彈性變形的可動部。 彈壓構件5、65，並不一定要設置。以可動部41、61 的彈力就足夠產生尾栓部3與主上尾栓部4的固定力，在 收容狀態可固定主竿1與主上竿2的情況，沒有彈壓構件 5、6 5也可以。 可動部41並不限定爲四個，只要可動部41在直徑方 向具備可撓性的話（可彈性變形），是三個以下或五個以上 都可以。 在本第一及第二實施方式，雖然是作成讓尾栓部3與 主上尾栓部4嵌合，而例如，在主上竿2的竿根側端部設 置朝軸方向延伸的細縫部，並且作成讓主上竿2的竿根側 端部的外周面與主竿1的竿根側端部的外周面嵌合的構造 也可以。在這種情況，藉由讓主上竿2的竿根側端部朝直 徑內側方向彈性變形，則在收容狀態可容易地固定主竿1 及主上竿2。 〔發明效果〕 如上述，本發明的釣竿，藉由設置可朝直徑方向彈性 -17- 1293019 (15) 變形的可動部，使公嵌合部與母嵌合部確實地嵌合，在收 容狀態可確實且穩定地固定竿前側的竿體與竿根側的竿 體。在製造時不需要嚴格的尺寸管理，可以減低製造成 本。而與僅依賴兩者的尺寸精度的傳統構造不同，是積極 利用直徑方向的彈性的構造，即使由於使用產生磨損，其 嵌合狀態也不會改變，容易確保長期穩定的性能。 【圖式簡單說明】 第1圖是槪略顯示本發明的第一實施方式的釣竿的尾 栓部及主上尾栓部附近的剖面圖，是顯示尾栓部與主上尾 栓部嵌合的狀態。 第2圖是槪略顯示本發明的第一實施方式的釣竿的尾 栓部及主上尾栓部附近的剖面圖，是顯示尾栓部與主上尾 栓部分離的狀態。 第3圖是第2圖的A— A線剖面圖。 第4圖是顯示第一實施方式的尾栓部及主上尾栓部的 立體圖。 第5圖是槪略顯示本發明的第二實施方式的釣竿的竿 根側的預定區域的剖面圖。 〔圖號說明〕 1 :主竿（竿根側的竿體） 2 :主上竿（竿前側的竿體） 3 :尾栓部（公嵌合部） -18- 1293019 (16) 4 :主上尾栓部（母嵌合部） 5、65 :彈壓構件 1 0、2 0 :母螺紋部 30 :尾栓主體 31 :蓋子 3 2 :公螺紋部 3 3 :螺合部 3 4 :嵌合突部 3 5 :連結部 4 0、6 0 :外壁部 41、 61 :可動部 4 1 a、6 1 a :小直徑部 4 1 b、6 1 b :大直徑部 42、 62 :連結部 43、 63 :橡膠座 44、 64 :公螺紋部 4 5 :細縫部On the other hand, in the case of fishing, the contained body is sequentially taken out from the front end of the main jaw, but at this time, the inner peripheral surface of the root end of each body is embedded. The outer peripheral surface of the front end portion of the continuous carcass is closed so that the respective carcasses do not fall off. Therefore, the extraction enthalpy in a state in which the main cymbal is connected to the front fine line in a straight line can be used. In this type of extraction, there is also a need to change the length of the fishing rod according to the situation. This is a telescopic extraction raking using a so-called telescopic mechanism. For example, in a state in which the main upper cymbal is inserted into the main cymbal, a general state in which almost all the length of the main cymbal is inserted into the main cymbal is called a accommodating state. In the state, the root end portion of the main upper jaw is fitted to the root end portion of the main jaw, and the state is maintained by the friction resistance -4- 1293019 (2) force. Therefore, in a state in which the main upper jaw is completely withdrawn from the main jaw (referred to as an extended state) and fixed, the storage state can also be fixed. Therefore, the fisherman can utilize the two fixed states in accordance with the length of use of the fishing rod. Fishing is performed in a situation (for example, refer to Patent Document 1). [Patent Document 1] Japanese Unexamined Patent Publication No. Hei No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. The structure in which the frictional resistance of the two is fixed is a strict dimensional adjustment in which a proper fitting state is required at the time of manufacture. Since the adjustment work is complicated, the manufacturing cost is increased. Since the reamer is used, it is easy to make the fitting surface thick, and it is difficult to obtain a smooth fitting state. Further, the frictional resistance generated by the dimensional accuracy of both of them obtains the structure of the fitting force, and as a result of deterioration in dimensional accuracy due to wear due to long-term use, there is a problem that the potential fitting state (fitting force) is easily changed. . In view of the above, an object of the present invention is to provide a fishing rod which does not require strict dimensional management during manufacture, and can smoothly carry out a housing operation, and can stably fix the body and the root side of the front side in the storage state. It is a corpus callosum and can be used for a long time. 1293019 (3) [Means for Solving the Problems] In order to solve the above problems, the fishing rod of the present invention includes a body 1 on the root side and a front side of the body 1 that is insertably inserted into the root side of the root The body 2 and the fishing rod of the male fitting portion 3 and the female fitting portion 4 that can be fixed in a state in which the body 2 on the front side of the crotch is accommodated in the body 1 of the crotch side is fitted to each other. At least one of the fitting portions 3 and 4 is provided with a movable portion 41 that is elastically deformable in the radial direction corresponding to the other fitting portion. With this fishing rod, the body 1 and the body 2 on the front side of the crotch can be fixed in the accommodated state by fitting the male fitting portion 3 to the female fitting portion 4. In this case, even if the male fitting portion 3 and the female fitting portion 4 have a slight dimensional error, and the movable portion 41 provided in one of the fitting portions can be elastically deformed in the radial direction in accordance with the other fitting portion, it can be confirmed. And the two fitting portions 3, 4 are smoothly fitted together. When the female fitting portion 4 is formed smaller than the male fitting portion 3, the movable portion 41 can be positively elastically deformed, and the elastic portion of the movable portion 41 can be fixed from the diameter direction to the other fitting portion. The force can securely and stably fix the two fitting portions 3 and 4 in the fitting state, and does not depend on the dimensional accuracy of both, but actively utilizes the elastic deformation in the diameter direction, so even if wear is caused by use, the fitting state It is also difficult to change and maintains a stable fitting force. In the fishing rod of the present invention, the movable portion 41 is made flexible in the diameter direction. With this type of fishing rod, when the body 2 on the front side of the crotch is moved in the axial direction and housed in the carcass 1 on the crotch side, the movable portion 4 1 is bent in the diameter direction by -6 - 1293019 (4). In other words, when the female fitting portion 4 is smaller than the male fitting portion 3, the movable portion 141 is elastically deformed in the radial direction without being elastically deformed in the axial direction with the movement of the male fitting portion 3. In the fishing rod of the present invention, the movable portion 41 is a plurality of flexible sheets that are arranged in a ring shape and extend in the axial direction. According to the fishing rod, when the two fitting portions 3 and 4 are fitted, the elastic force of the plurality of movable portions 41 that are deflected in the radial direction acts on the entire circumference of the other fitting portion, and The two fitting portions 3, 4 are fitted in a stable state. The fishing rod of the present invention is provided with a biasing member 6 for biasing the movable portion 41 in a direction in which the fixing force of the two fitting portions 3, 4 is increased. According to the fishing rod, the fixing force of the two fitting portions 3 and 4 is further increased, so that the body 1 on the root side and the body 2 on the front side of the head can be firmly fixed in the accommodated state. An annular biasing member 5 for biasing the movable portions 41 in a direction in which the fixing force of the two fitting portions 3 and 4 is increased in a concentric manner with each of the movable portions 41 is provided. Thereby, in the accommodated state, the body 1 on the root side and the body 2 on the front side can be firmly fixed. [Embodiment] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1 and 2 are cross-sectional views schematically showing a predetermined region on the root side of the fishing rod of the present invention, and Fig. 1 is a view showing the maximum insertion of the main upper jaw 2 to the main 1293019 (5) 竿1 In the so-called storage state, the second figure shows a state in which the main upper jaw 2 is pulled out toward the front side by a predetermined amount from the accommodation state. As shown in Fig. 1 and Fig. 2, the main upper jaw 2 is inserted into the main jaw 1 so as to be retractable, and is freely expandable and contractible with respect to the main jaw 1. In the present embodiment, the main upper jaw 2 is equivalent. The corpus callosum on the anterior side of the iliac crest is the corpus callosum corresponding to the iliac crest. And although there is no figure, the inside of the main thousand is inserted into more than one carcass in sequence. These carcasses, when extracted from the main upper jaw 2, are generally called the front fines on the foremost side, and the middle ones between the front fines and the main upper jaws. The main cymbal 1 and the main upper cymbal 2 are formed in a tapered shape having a narrower diameter toward the front side, and the main upper cymbal 2 is formed to have a smaller diameter than the main cymbal 1 to serve the main upper cymbal. 2 is housed inside the main raft 1. On the other hand, the inner peripheral surface of the front end portion of the main jaw i is formed to have a smaller outer diameter than the outer peripheral surface of the root end portion of the main upper jaw 2. Then, the main upper jaw 2 is maximally extracted from the front end portion of the main jaw 1 by the so-called extended state, and the inner peripheral surface of the front end portion of the main jaw 1 and the outer peripheral surface of the root end portion of the main upper jaw 2 are provided. The fitting is performed to fix the main cymbal 1 and the main upper cymbal 2 in an extended state. The main crucible 1 and the main upper crucible 2 are formed by preliminarily immersing a synthetic resin in a prepreg of reinforcing fibers such as carbon fibers or glass fibers, and curing them by firing. As shown in FIG. 1 and FIG. 2, the fishing rod according to the first embodiment is provided with a tail plug portion (a male fitting portion) that can fix the main jaw 1 and the main upper jaw 2 in a housed state by fitting each other. 3) and the main upper tail plug portion (mother fitting portion) 4. The tail plug portion 3' is mounted on the root side end portion of the main jaw, and the main upper tail bolt portion 4 疋: the female root coat is on the main stem of the main root side of the stem 2' to accommodate the main upper jaw 2 - 8 - 1293019 (6) When the main cymbal 1 is attached, the main upper tail bolt portion 4 and the tail bolt portion 3 are fitted to each other (the tail bolt portion 3 is fitted into the main upper tail bolt portion 4), and the main raft 1 and the main body are fixed in the accommodating state. Captain 2. (refer to Fig. 1) The above-described tail plug portion 3 is a female screw portion 1 形成 which is detachably screwed to the inner peripheral surface of the root end portion of the main cymbal 1 and is provided to close the main cymbal 1 The opening of the side end of the root. The tail plug portion 3 is provided with a tail plug main body 30 screwed to the female screw portion 1A, and a cover 31 which is made of rubber, metal or synthetic resin, and is attached to the tail plug main body 30, and is attached to the cover 31. At the time of the main cymbal 1, the end portion of the main raft 1 is protected by exposing the lid 31 to the outside of the root side. The tail plug main body 30 is provided with a disk-shaped base 35, a screwing portion 33 that protrudes from the peripheral edge of the base 35 toward the front side, and a base from the base of the screw portion 33. 3 5 is a fitting protrusion 34 that protrudes toward the front side of the crucible. The screwing portion 33 is formed in a cylindrical shape, and a male screw portion 32 that is screwed to the female screw portion 10 is formed on the outer peripheral surface thereof. The fitting projections 3 4 are formed in a cylindrical shape and are disposed concentrically with the screwing portion 33. Therefore, when the tail plug portion 3 is attached to the main cymbal 1, the axis of the fitting projection 34 is coaxial with the axis of the main cymbal 1. The fitting projection 34 has a diameter set to be about 1 /2 of the inner diameter of the root end portion of the main crucible 1, and the outer peripheral surface of the front end portion (the front end portion of the crucible) is formed to have a narrow front end. The cone shape. The main upper tail portion 4 is a female screw portion 20 which is screwed to the inner peripheral surface of the root end portion of the main upper jaw 2, and is fitted to the tail plug portion 3, -9-1293019 (7) Further, the shape of the tail plug portion 3 can be elastically deformed in the diameter direction. Specifically, the main upper tail portion 4 includes an outer wall portion 40 having a substantially cylindrical shape, a plurality of movable portions 4 1 disposed inside the outer wall portion 40, and a connecting outer wall portion 40 and the movable portion 4 The outer joint portion 42 of the first front end portion of the first side, the outer diameter of the outer wall portion 40 is formed to be substantially the same as the outer diameter of the front end portion of the main upper jaw 2, and the male outer peripheral surface of the front side is formed with a male thread. Part 44. The male screw portion 44 is detachably attached to the root end portion of the main upper jaw 2 by screwing with the female screw portion 20. The movable portion 41 is disposed annularly inside the outer wall portion 40 so as to be concentric with the outer wall portion 40 via a predetermined annular gap. Specifically, the movable portion 41 is a plurality of flexible sheets that are formed to extend in the axial direction as shown in FIGS. 3 and 4, and the movable portion 41 is formed to allow the insertion of the fitting projection 34. The cylindrical insertion space 46. In other words, the movable portion 41 is formed by cutting the cylindrical tubular body in the circumferential direction by the slit portion 45 extending in the axial direction to form a flexible sheet extending in the axial direction, and the cross section in the radial direction is formed as sector. The slit portions 45 of the first embodiment are disposed at four positions at equal intervals in the diameter direction, whereby the movable portions 41 are formed in a total of four. On the other hand, the length of the movable portion 41 in the circumferential direction is formed to be longer than the length of the slit portion 45 in the circumferential direction. Further, the movable portion 41 and the fitting projection 34 are formed to have substantially the same length in the axial direction, and the length thereof is set to be longer than the outer diameter of the fitting projection 34. The movable portion 41 has a coupling portion 4 2 as a fulcrum and has flexibility in the diameter direction of -10- 1293019 (8). When the fitting projection 34 is inserted into the insertion space 46, it is elastically deformed in the radial direction. Specifically, among the diameters of the insertion spaces 46 formed by the movable portion 41 (hereinafter referred to as the inner diameter of the movable portion 41), at least the diameter of the distal end portion (the root end portion) is formed to be slightly smaller than The outer diameter of the fitting projection 34. That is, the movable portion 41 can be elastically deformed in the outer diameter direction by inserting the fitting projection 34 into the insertion space 46 of the main upper tail portion 4. Specifically, as shown in FIG. 1 or FIG. 2, the inner diameter of the movable portion 41 is formed as a small diameter portion 4 1 a which is slightly smaller than the outer diameter of the fitting projection 34, and is formed as The large diameter portion 4 1 b is slightly larger than the outer diameter of the fitting projection 34, and the small diameter portion 4 1 a is placed on the root side of the large diameter portion 4 1 b. That is, the front end portion of the movable portion 4 1 is the small diameter portion 4 1 a. Further, the movable portion 41 is made to be deflectable in the radial direction by fitting the small-diameter portion 4A with the fitting projection 34. The length of the small-diameter portion 41a in the axial direction is preferably set to a size that is slightly shorter than the larger diameter portion 41b. Specifically, for example, when the outer diameter of the fitting projection 34 is formed to be 1 2 · 5 mm, the inner diameter of the small diameter portion 41a of the movable portion 41 is formed to be 12·3 mm. The inner diameter of the front end portion of the movable portion 41 is preferably set to a length of about 98% of the outer diameter of the fitting projection 34. The front end portion of the movable portion 41 extends closer to the root side than the outer wall portion 4'. When the main upper jaw 2 is inserted into the main jaw 1, the front end portion of the movable portion 41 is brought into contact with the tail portion. The annular cushion rubber 3 6 ' provided in the plug portion 3 can position the main upper jaw 2 in the accommodated state. The material of the tail plug main body 30 and the main upper tail plug portion 4 is generally composed of a synthetic resin (especially a synthetic resin excellent in slidability). As the synthetic resin, ABS or PBT (polybutylene terephthalate) is used. Specifically, in the tail plug main body 30, a PC/ABS type polymer alloy or PBT containing glass or the like is used. The glass containing PBT preferably has a glass content of 20% to 30%, particularly preferably 30% of glass fibers and 20% of glass beads. In the main upper tail portion 4, in addition to the above-described configuration for the tail plug portion main body 30, for example, a PC is also used. The combination of the material of the tail plug main body 30 and the main upper tail plug portion 4 is also arbitrary, and the two may be made of the same material or different materials. For example, in both the tail plug main body 30 and the main upper tail plug 4, a PC/ABS type polymer alloy (for example, the brand name MARUTHIRON manufactured by Teijin Chemicals Co., Ltd.) is used, or 30% of glass fibers are used in both of them. PBT. Alternatively, the plating process may be performed on the tail plug main body 30 or the main upper tail plug portion 4. It is preferable to plate Ni-Ni-Cr. Further, when the tail plug main body is subjected to the plating treatment, the plating treatment may be not performed only on the fitting projections 34. In the main upper tail portion 4, a biasing member 5 is provided. The elastic member 5 is formed in a ring shape, and has an inner diameter which is set to be slightly smaller than the outer diameter of the front end portion (small diameter portion 4 1 a) of the movable portion 41, and the axial direction length thereof is formed to be small diameter. The length of the portion 4 1 a is substantially the same 'is the outer circumference of the small diameter portion 4 1 a. In other words, by the elastic member 5, the movable portion 41 is biased toward the inner side in the diameter direction, and the inner diameter ' of the small-diameter portion 41a is formed to be smaller than the outer diameter of the fitting projection 34. Specifically, the inner diameter of the small-diameter portion 41a is set to a size of n. 8 mm by providing the biasing -12-1293019 (10) member 5. That is, the inner diameter of the small-diameter portion 4 1 a is set to a length of about 94. 4% of the outer diameter of the fitting projection 34 by the elastic member 5. The elastic member 5 is formed of natural rubber or synthetic rubber, and is preferably formed of tannin. Preferably, the biasing member 5 is detachably mounted to the main upper tail portion 4. On the front side of the main upper tail portion 4, a rubber seat 43 having a substantially disk shape is provided. The rubber seat 43 has an outer diameter which is formed to be substantially the same as the inner diameter of the root end portion of the main upper jaw 2, and is closed by the outer rubber seat 43 at the root end portion of the main upper jaw 2. When the middle jaw or the front fine head is housed in the main jaw 1, the cushion base structure is formed by abutting the root end portions. When the fishing rod according to the first embodiment is changed from the extended state to the accommodated state as described above, the fitting projection 34 of the tail plug portion 3 is inserted into the inner space of the movable portion 41 of the main upper tail portion 4, and the tail plug is allowed. The portion 3 is fitted to the main upper tail portion 4 to fix the main cymbal 1 and the main upper cymbal 2 in a housed state. At this time, since the movable portion 4 1 is elastically deformable in the radial direction, even if the outer diameter dimension of the fitting projection 34 is slightly different from the inner diameter of the movable portion 41 (the outer diameter of the insertion space 46), When the tail plug portion 3 is fitted into the main upper tail portion 4, the main jaw 1 and the main upper jaw 2 can be fixed in the accommodated state. As described above, by making the inner diameter of the small-diameter portion 4 1 a of the movable portion 4 1 smaller than the outer diameter of the fitting projection 34, in the fitted state, the movable portion 41 is deflected toward the outer diameter direction, and the borrowing portion is borrowed. Since the fixing force of the tail plug portion 3 and the main upper tail bolt portion 4 is generated by the elasticity of the movable portion 41, the main jaw 1 and the main upper jaw 2 can be surely fixed in the accommodated state. Because it is a 13- 1293019 (11) structure that is actively engaged with the elastic deformation in the diameter direction, it can be smoothly performed in the housing operation, and even if it is worn due to long-term use, the fitting state of both will not be Change, you can get a long-term stable fixed force. Since the movable portion 41 is formed of a synthetic resin and extends in the axial direction, the movable portion 41 is not axially oriented by the friction between the movable portion 41 and the fitting projection 34 when the fitting projection 34 is fitted. The deflection is only elastically deformed in the diameter direction. Therefore, the tail plug portion 3 can be easily inserted into the main upper tail portion 4. The movable portion 41 is formed by the small diameter portion 4 1 a and the large diameter portion 4 1 b, and the size of the small diameter portion 41a is set to be shorter in the axial direction so that the size of the larger diameter portion 41b is shorter, thereby reducing the fitting protrusion The contact area between the portion 34 and the movable portion 41 can reduce the frictional resistance at the time of insertion. Further, since the main upper tail portion 4 is provided with the elastic member 5 that biases the movable portion 41 toward the inner side in the diameter direction, the fixing force of the tail plug portion 3 and the main upper tail portion 4 can be further increased. In other words, when the tail plug portion 3 and the main upper tail plug portion 4 are fitted, the elastic member 5 further increases the elastic force of the movable portion 41 toward the inner diameter direction, so that the main body can be more reliably fixed in the accommodated state.竿1 and the main 竿2. If the elastic member 5 is detachably provided with respect to the main upper tail portion 4, the spring member 5 is deteriorated with time due to long-term use, and the spring bolt can be restored by renewing the elastic member 5. The fixed force of the part 3 and the main upper tail portion 4. If a plurality of elastic members 5 having different elastic coefficients are prepared, the fixing force can be adjusted to obtain a fixing force of a desired strength in accordance with the preference of the fisherman. -14- 1293019 (12) Since the tail plug portion 3 and the main upper tail bolt portion 4 are screwed to the main upper jaw 2, respectively, when the fitting projection 34 and the movable portion 41 are produced, the tail plug portion can also be used. 3 and the main upper tail bolt 4 is exchanged. In the first embodiment, the tail plug portion 3 and the main upper tail portion 4 which are respectively provided at the respective end portions of the main jaws 1 and 2 are fitted, so that the main upper jaw 2 can be maximized. Insert 1. It is possible to make the use length of the carcass a very long-length telescopic structure of the main crucible 1 which is excellent in efficiency. Next, a first embodiment of the fishing rod of the present invention will be described with reference to Fig. 5. In the fifth embodiment, the same reference numerals are attached to the structure of the embodiment shown in Fig. 1, and the detailed description is omitted. In the second embodiment, the structure of the main upper tail portion 6 is different from that of the first embodiment shown in Fig. 1. As shown in Fig. 5, the main upper tail portion 6 includes a substantially outer wall portion 60 and a plurality of movable portions 61 disposed on the inner side of the 60 through a predetermined annular gap, and the movable portion 6 is provided by the movable portion 6. 1 A cylindrical insertion space into which the fitting protrusion 34 is inserted is formed. The outer wall portion 60 portion 161 is formed by the connecting portion 62 connecting portion 62 at the end portion of the front end portion, and the end portion of the root portion is formed as a fulcrum so as to be elastically deformable. The outer peripheral portion of the front end portion of the outer wall portion 60 is formed with a portion 64 in which the female screw portion 20 formed by the root end portion of the upper jaw 2 is screwed, and is screwed to the root side of the main upper jaw 2 Ends. The inner diameter of the movable portion 6-1 (the diameter of the insertion space) is such that: the main 竿 1 wears the main splicing, and the main 竿 is changed, and the second embodiment is the same as the cylindrical outer wall portion. The movable knot may be formed in the radial direction with the main male thread as -15-1293019 (13) a small diameter portion 6 1 a slightly smaller than the outer diameter of the fitting protrusion 34, and formed to be slightly larger than the fitting protrusion 34 The large diameter portion 61b of the diameter constitutes the 'small diameter portion 6-1a, which is placed on the root side of the large diameter portion 6 1 b. In other words, the base end portion (the root end portion) of the movable portion 61 is the small diameter portion 6 1 a. Further, the movable portion 61 is made to be deflected in the radial direction by engaging the small-diameter portion 61a with the fitting projection 34. The length of the small-diameter portion 61a in the axial direction is preferably set to a size slightly larger than the larger diameter portion 6 1 b. At the front end portion of the main upper tail portion 6, a rubber seat 63 having a substantially disk shape is provided, and a slightly annular elastic member 65 facing the root side is protruded from the rubber seat 63. That is, the rubber seat 63 and the elastic member 65 are integrally formed. The inner diameter of the biasing member 65 is formed to be slightly smaller than the outer diameter of the distal end portion (large diameter portion 61b) of the movable portion 61, and is formed such that each movable portion 61 is biased toward the inner diameter direction. The rubber seat 63 and the elastic member 65 are formed of natural rubber or synthetic rubber, and are preferably formed of silicone rubber. According to the fishing rod of the second embodiment, when the fitting projection 34 is inserted into the insertion space formed by the movable portion 61, the movable portion 61 is elastically deformed in the outer diameter direction, which is easy. By fitting the tail plug portion 3 to the main upper tail plug portion 4, the main jaw i and the main upper jaw 2 can be surely fixed in the accommodated state. Since the elastic member 65 and the rubber seat 63 are integrally molded, the number of parts can be reduced as compared with the first embodiment described above, and assembly can be easily performed. The fishing rod of the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope without departing from the spirit of the invention. For example, & first and second embodiments, the movable portions 41, 61 may be provided on the main upper -16 - 1293019 (14) tail plug portion 4, or may be provided in the tail plug portion 3. Specifically, for example, a plurality of slit portions extending in the axial direction are provided in the fitting projection 34, and a flexible sheet (movable portion) extending in the axial direction may be formed. Thereby, since the fitting projection 34 can be elastically deformed in the diameter inner direction, the tail plug portion 3 and the main upper tail plug portion 3 can be easily fitted even if there is a slight error in the size. One of the tail plug portion 3 and the main upper tail portion 4 may be provided with a movable portion that is elastically deformable in the radial direction. The biasing members 5, 65 are not necessarily provided. The elastic force of the movable portions 41, 61 is sufficient to generate the fixing force of the tail plug portion 3 and the main upper tail portion 4, and the main jaw 1 and the main upper jaw 2 can be fixed in the accommodating state, and the elastic members 5, 6 5 can also be used. . The movable portion 41 is not limited to four, and may be three or less or five or more as long as the movable portion 41 is flexible in the diameter direction (elastically deformable). In the first and second embodiments, the tail plug portion 3 is fitted to the main upper tail portion 4, and for example, a slit portion extending in the axial direction is provided at the root end portion of the main upper jaw 2, Further, a structure may be adopted in which the outer peripheral surface of the root end portion of the main upper jaw 2 and the outer peripheral surface of the root end portion of the main jaw 1 are fitted. In this case, the main jaw 1 and the main upper jaw 2 can be easily fixed in the accommodated state by elastically deforming the root end portion of the main upper jaw 2 in the direction of the inner diameter. [Effect of the Invention] As described above, the fishing rod of the present invention is provided with a movable portion that is deformable in the radial direction elastic -17-1293019 (15), and the male fitting portion and the female fitting portion are surely fitted in the accommodating state. The corpus callosum on the anterior side of the ankle and the corpus callosum on the iliac crest side can be fixed reliably and stably No strict dimensional management is required at the time of manufacture, which can reduce manufacturing costs. Unlike the conventional construction which relies only on the dimensional accuracy of both, it is a structure which actively utilizes the elasticity in the diametric direction, and even if the wear is caused by the use, the fitting state does not change, and it is easy to ensure long-term stable performance. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a vicinity of a tail plug portion and a main upper tail portion of a fishing rod according to a first embodiment of the present invention, showing a state in which a tail plug portion is fitted to a main upper tail portion. . Fig. 2 is a cross-sectional view showing the vicinity of the tail plug portion and the main upper tail portion of the fishing rod according to the first embodiment of the present invention, showing a state in which the tail plug portion is separated from the main upper tail portion. Fig. 3 is a cross-sectional view taken along line A-A of Fig. 2. Fig. 4 is a perspective view showing the tail plug portion and the main upper tail plug portion of the first embodiment. Fig. 5 is a cross-sectional view schematically showing a predetermined region on the root side of the fishing rod according to the second embodiment of the present invention. [Description of the figure] 1 : Main 竿 (body on the root side) 2 : Main 竿 (竿 on the front side) 3 : Tail part (male fitting) -18- 1293019 (16) 4 : Main Upper tail bolt portion (female fitting portion) 5, 65: spring member 10, 2 0: female thread portion 30: tail bolt body 31: cover 3 2: male thread portion 3 3 : screw portion 3 4 : fitting protrusion Portion 3 5 : connecting portion 40 , 60 : outer wall portion 41 , 61 : movable portion 4 1 a, 6 1 a : small diameter portion 4 1 b, 6 1 b : large diameter portion 42 , 62 : connecting portion 43 63: rubber seat 44, 64: male thread portion 4 5 : slit portion