201026984 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種管接頭用鎖固環及管接頭，特別 是一種能防止插入至管接頭内部之管體脫落的管接頭 用鎖固環及管接頭。 【先前技術】 習知技術中，一般係使用一種能以單手快速操作 (〇ne_t〇uch)來使管體連接到接頭本體之插入孔、抑或使 該管體鬆脫的管接頭。 此種管接頭，在插入孔内部設置有一鎖固環（1〇ck ring)，而該鎖固環内緣側形成有爪扣。接著，以鎖固環 之爪扣來咬合插入至該插入孔的樹脂製管體之外緣周 面，藉以預防該管體自插入孔處鬆脫（參考例如專利文 獻1)。但是，專利文獻丨所記載之管接頭有可能會使 得該鎖固環之爪扣咬合至該管體的咬合程度過多。 又’專利文獻2係設置有一用以限制該鎖固環之爪 扣兩侧之咬合的限制部。但是’舰制部是為將該爪扣 部圓周方向之端部峰所形成的樣態，故#該管體受到 一拔出方向之力作用時，限制部仍有可能會過度咬合至 該管體。 專利文獻1 .日本發明特開2004-308793號公報 專利文獻2:日本發明特開2008-111531號公報 201026984 【發明内容】 有鑑於前述之問題點，本發明之目的係以提供 能更確實地預防該爪扣部對管體之咬合超過 以上的管接頭用鎖固環及管接頭。 程度 為了解決前述課題，本發明第1樣態之管接頭用錯 _ ’其係構成讓管義人之管接頭的-部份，並用^ 防止=管體脫落，其特徵在於具有： ❹ 0 環狀之環狀部，被設置於該管體外側； 複數個爪扣部，由該環狀部徑方向之内側延 且咬合於该管體之外緣周面以防止該管體脫落； 及 Λ 限制部’被形成纟鄰接該爪扣部的位置，且以 二該ΐ體徑方向外側的角度而抵接至該ϊ 度。、、周面，糟以限制該爪扣部咬合至該管體的程 頭内=樣態之管接麵顧環中，當管體插入至管接 固環之π =為内部壓力之作用等會使得自管接頭用鎖 管體之^狀部處延伸突出的複數個爪扣部係咬合至★亥 止管體周：’並藉由該爪扣部來保持該管體，以‘ 設d管接頭用鎖固環係於鄰接爪扣部的位置處 徑方向外：二t限制部係以較該爪扣部更朝向該管體 令爪;角度而抵接至該管體的外緣周面，以限制 ΐ體：广交合至該管體的程度。藉此，可預防爪扣部對 咬合超過一定程度以上，以預防當爪扣部咬合程 201026984 L夕而使得該爪扣部貫穿該管體等問題發生。 ，本發明第2樣態係如申請專利範圍第1項之管接頭 用鎖固環’且其中該限制部係被形成於該爪扣部的圓周 方向之兩側。 於第2樣態中，因為該限制部係形成於爪扣部的圓 周方向之兩侧，所以當複數個爪扣部咬合至管體之外緣 周面時，爪扣部兩側的限制部會抵接至管體的外緣周 面。因此’讓爪扣部對管體之咬合度穩定化，故可更確 實地控制其咬合程度。 本發明第3樣態係如第丨樣態之管接頭用鎖固環， 且其中該限制部係由該環狀部朝向該管體之插入方向 的深入侧。又，本發明第4樣態係如第2樣態之管接頭 用鎖固環’且其中該_部係由該環狀部朝向該管體之 插入方向的深入側。 第3樣態及第4樣態中’因為限制部係環狀部由該 環狀部朝向該管體之插入方向的深入侧，故能讓該管體 輕易地插入。 接頭本體，形成有讓管體插入的插入孔· 管接頭用鎖固環，係具有：環狀之環狀部，被設 於該管體外侧’複數個爪扣部’由該環狀抑方向之】 側延伸突出，且咬合於該管體之外緣周面^止該㊅ 脫落；及限制部，被形成在鄰接該爪扣部的位且] 較該爪扣部更朝向該管體徑方向相㈣度而抵接」 201026984 該管體的外緣周面，藉心φ 程度；以及 父合至該管體的 套筒，套在該接頭本體的外侧，且 接頭用鎖固環保持於該接頭本體，有-將該管 用鎖固環之該環狀抑預_爪扣部自^該管接頭 的錐面。 目該管體處脫落 ❿ ❹ 第5樣態之本發㈣在接頭本體 插入的插人孔，並將管接頭用鎖固環之Ρ^成一讓管體 接頭本體上。又，藉由套在該接頭本C 該 孔時’因為内部壓力之作用等會使得 環狀部抵祕套筒讀面處，故會使 至該管體，同時能預防該爪扣== 二=成在鄰接該管接頭用鎖固環之爪扣部 的位置處的限制部係抵接至管體之外緣周面，故限制了 爪扣部對管_咬合程度。因此，可預防爪扣部對管體 ，咬合超過-枝度m獅當爪扣部咬合程度過 夕而使得該爪扣部貫穿該管體等問題發生。 本發明第6樣態係如第5樣態之管接頭，且今 管體係為樹脂製或橡膠製。 ’、" f 6樣態之發明中’該管體係為樹脂製或橡膠製， 因此官接碩用鎖固環之水扣部較容易咬合於管體之外 緣周面。 本發明第7樣態係如第5樣態之管接頭，且其中該 201026984 套筒之内緣側係設置有一解除環，係可將其插入爪扣部 和管體之間，以解除該爪扣部對該管體之咬合。又，本 發明第8樣態係如第6樣態之管接頭，且其中該套筒之 内緣侧係^置有-解除環，係可將其插人爪扣部和管體 之間，以解除該爪扣部對該管體之咬合。201026984 6. Technical Field of the Invention The present invention relates to a lock ring and a pipe joint for a pipe joint, and more particularly to a pipe joint lock ring capable of preventing a pipe body inserted into a pipe joint from falling off and Pipe joints. [Prior Art] In the prior art, a pipe joint which can be quickly operated by one hand to connect the pipe body to the insertion hole of the joint body or to loosen the pipe body is generally used. In the pipe joint, a lock ring is disposed inside the insertion hole, and a claw buckle is formed on the inner edge side of the lock ring. Then, the outer periphery of the resin tube inserted into the insertion hole is engaged with the claw of the lock ring to prevent the tube from coming loose from the insertion hole (refer to, for example, Patent Document 1). However, the pipe joint described in the patent document 有 may cause the claw of the lock ring to bite to the pipe body to be excessively engaged. Further, Patent Document 2 is provided with a restricting portion for restricting the engagement of the both sides of the claw of the lock ring. However, the 'ship part is a form formed by the end of the claw in the circumferential direction. Therefore, when the tube is subjected to a pulling force, the restricting portion may still excessively bite into the tube. body. Patent Document 1. Japanese Laid-Open Patent Publication No. 2004-308793 (Patent Document 2) Japanese Laid-Open Patent Publication No. 2008-111531 No. 201026984 SUMMARY OF THE INVENTION In view of the foregoing problems, the object of the present invention is to provide a more preventable prevention. The engagement of the claw portion with the tubular body exceeds the above-mentioned locking ring for the pipe joint and the pipe joint. In order to solve the above problems, the pipe joint according to the first aspect of the present invention uses the error _ 'which constitutes the portion of the pipe joint of the pipe holder, and uses ^ to prevent the pipe body from falling off, and is characterized by having: ❹ 0 ring The annular portion is disposed outside the tubular body; the plurality of claw portions extend from the inner side in the radial direction of the annular portion and engage with the outer peripheral edge of the tubular body to prevent the tubular body from falling off; The portion 'is formed at a position adjacent to the claw-fastening portion, and is abutted against the second angle at an angle of the outer side in the radial direction of the body. , the circumferential surface, to limit the claw buckle portion to the end of the pipe body of the pipe body = the shape of the pipe joint surface, when the pipe body is inserted into the pipe joint ring π = the role of internal pressure, etc. The plurality of claws extending from the joint portion of the lock pipe body can be engaged to the circumference of the pipe body: 'and the claw body is used to hold the pipe body, to set d The pipe joint locking ring is located outside the radial direction at a position adjacent to the claw fastening portion: the two t restricting portion is oriented toward the tubular body claw more than the claw fastening portion; the angle abuts to the outer edge of the tubular body Face to limit the carcass: the extent to which the body is widely joined to the body. Thereby, it is possible to prevent the claw-fastening portion from being engaged more than a certain degree or more to prevent the problem that the claw-fastening portion penetrates the tubular body when the claw-fastening portion is engaged. The second aspect of the invention is the locking ring for a pipe joint according to claim 1, wherein the restricting portion is formed on both sides of the claw portion in the circumferential direction. In the second aspect, since the restricting portion is formed on both sides in the circumferential direction of the claw portion, when the plurality of claw portions are engaged to the outer peripheral edge of the tubular body, the restricting portions on both sides of the claw portion Will abut the outer periphery of the pipe body. Therefore, the degree of engagement of the claw portion with respect to the tubular body is stabilized, so that the degree of engagement can be more surely controlled. The third aspect of the present invention is a lock ring for a pipe joint of the second aspect, and wherein the restricting portion is formed on an inward side of the annular portion toward the insertion direction of the pipe body. Further, the fourth aspect of the present invention is the lock ring for the pipe joint of the second aspect, and wherein the _ portion is formed on the deep side of the insertion direction of the annular portion toward the pipe body. In the third and fourth modes, the restricting portion annular portion is inserted from the annular portion toward the insertion direction of the tubular body, so that the tubular body can be easily inserted. The joint body is formed with an insertion hole for inserting the pipe body and a lock ring for the pipe joint, and has an annular ring portion, and is provided on the outer side of the pipe body; the plurality of claw portions are formed by the ring direction The side extension protrudes, and the peripheral surface of the outer edge of the tubular body is engaged with the six-part shedding; and the restricting portion is formed at a position adjacent to the claw-fastening portion and is closer to the tubular body than the claw-fastening portion The direction phase (four degrees) abuts" 201026984 The outer peripheral edge of the pipe body, by the degree of φ; and the sleeve of the father to the pipe body, sleeved on the outside of the joint body, and the joint is held by the locking ring The joint body has a tapered surface of the pipe joint with the ring of the lock ring. The tube body is detached. ❿ ❹ The 5th aspect of the hair (4) is inserted into the connector body, and the pipe joint is locked into the body of the pipe body by a locking ring. Moreover, when the hole is placed in the joint of the joint C, the annular portion is prevented from being in the surface of the sleeve by the action of the internal pressure, so that the tube body can be prevented, and the claw buckle can be prevented. = the restriction portion at a position adjacent to the claw fastening portion of the pipe joint locking ring abuts against the outer peripheral edge of the pipe body, thereby limiting the degree of engagement of the claw fastening portion with respect to the pipe. Therefore, it is possible to prevent the claw portion from being engaged with the tube body, and the occlusion exceeds the degree of branching. When the lion is engaged with the claw portion, the claw portion passes through the tube and the like. The sixth aspect of the present invention is the pipe joint of the fifth aspect, and the pipe system is made of resin or rubber. In the invention of the 'f' state, the pipe system is made of resin or rubber, so that the water-fastening portion of the lock ring of the official joint is more likely to be engaged with the outer peripheral edge of the pipe body. The seventh aspect of the present invention is the pipe joint of the fifth aspect, and wherein the inner edge of the 201026984 sleeve is provided with a release ring, which can be inserted between the claw portion and the pipe body to release the claw The buckle portion is engaged with the tube body. Further, the eighth aspect of the present invention is the pipe joint of the sixth aspect, and wherein the inner edge side of the sleeve is provided with a release ring, which can be inserted between the claw buckle portion and the pipe body. The engagement of the claw portion with the tube body is released.
第7樣態及第8樣態之發明係將設置於套筒的解除 環插入至爪扣部與管體之間，以解除爪扣部對管體之咬 合，並可將該管體自插入孔處拔出。因此，可藉由簡單 之操作來將管體自管接頭處鬆脫。 本發明之管接頭用鎖固環及管接頭係可預防爪扣 部對管體之咬合超過-定程度以上，以預防爪扣部貫穿 該管體等問題發生。 、 【實施方式】 以下係參考圖式說明本發明之實施形態。 圖1係具備有本發明實施形態之管接頭用鎖固環 30的管接頭1〇之爆炸圖。又，圖2係將管體4〇插入❹ 至具備有本發明實施形態之管接頭用鎖固環30的管接 碩丨〇之前的半剖面圖。 官接頭10係具備有管狀之本體部12以及套在該本 體部12外側的管狀中間部14。由該本體部12與=中 間部14來構成接頭本體16。再者，f接頭1G係呈備 有管狀套筒18。該套筒18係套在該中間部14之外侧。 如圖2所示’在中間部14及套筒18、與本體部12之 8 201026984 間係形成-能讓營徵仙插人的插入孔2〇。 套筒18之内側係設置一用以將管體40保持於插入 貞固環30。該鎖固環30之剖面旋轉90度後係 予型’該略呈V字蜜的開口部30A (參考圖4) 糸，向接頭本體16之深人側（管體4。插人侧的反向侧；) 所設置的。垃装 間部14之前’ ^固環30之開口部3〇Α係面向該中In the seventh aspect and the eighth aspect, the release ring provided in the sleeve is inserted between the claw fastening portion and the tubular body to release the engagement of the claw fastening portion with the tubular body, and the tubular body can be self-inserted. Pull out the hole. Therefore, the pipe body can be loosened from the pipe joint by a simple operation. The locking ring and the pipe joint for the pipe joint of the present invention can prevent the nip of the claw portion from exceeding the predetermined level to prevent the claw portion from penetrating through the pipe body. [Embodiment] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1 is an exploded view of a pipe joint 1〇 provided with a lock ring 30 for a pipe joint according to an embodiment of the present invention. Further, Fig. 2 is a half cross-sectional view before the tube body 4 is inserted into the tube having the lock ring 30 for the pipe joint according to the embodiment of the present invention. The official joint 10 is provided with a tubular body portion 12 and a tubular intermediate portion 14 that is fitted over the outside of the body portion 12. The joint body 16 is constituted by the main body portion 12 and the intermediate portion 14. Further, the f-joint 1G is provided with a tubular sleeve 18. The sleeve 18 is sleeved on the outer side of the intermediate portion 14. As shown in Fig. 2, 'between the intermediate portion 14 and the sleeve 18, and the main body portion 12 between 2010 and 201026, the insertion hole 2 of the camp can be inserted. The inside of the sleeve 18 is provided with a means for retaining the tubular body 40 in the insertion tamping ring 30. After the cross section of the lock ring 30 is rotated by 90 degrees, the opening portion 30A (refer to FIG. 4) which is slightly V-shaped honey is applied to the deep human side of the joint body 16 (the tube body 4. the opposite side of the insertion side) To the side ;) set. Before the lavatory portion 14 is formed, the opening portion 3 of the solid ring 30 faces the middle portion
份係抵接於前端邻:Α’且略呈V字型之内側面的-部 說明。 糙邰14Α。關於鎖固環30容待後續詳細 v 字 20的入口邻7Πδ 田。該錐面18Α係朝向插入孔 於套筒18之其直徑所形成的。 移動的解除環入有一能沿管接頭10軸方向 入口部2〇Ι Α彳’,且較鎖固環30更靠進插入孔20之 之圓周方向倍带占古办伤。於解除環22深入側外緣 18内緣所形成:Ϊ 起部22A，可藉由抵接於該套筒 落。突起t = 以防止其撕 固環30彳#22]B係前端較細且沿著該鎖 -面：入 =:::周，所設置一 12Α，於該等外緣溝槽$周面係1置有2個外緣溝槽 24。 中各自嵌有橡膠製0型環 入 本體部12增辦㈣請更深入侧的插 201026984 孔20最深部係具有擴張外徑而形成的壁面i3。該管體 40前端係抵接於該_ 13，故該壁面13係成為管體 40的止擋彳又’在该本體部之反向於插入孔如 之-側則形成有連接其他管線的㈣、紋12B。又，本體 部12之反向於插入孔2〇之—側的端部係形成有用以連 接其他管體（圖中未顯示）的凸緣部12c。 該管接頭10之本體部12可為青銅製；中間部14、 套筒18及解除環22可為樹月旨製；鎖固環30則可為不 錄鋼製。另外’管細1G各崎之材質縣限定於此， 亦可使用其他材質。又’管體4G雜脂製。再者，管 體4〇可為橡膠製、抑或係為鎖固環％爪扣部％可咬 合的其他較軟之組件。 圖3係顯示圖1所示管接頭10所使用的鎖固環3〇 f -元件。圖3A係鎖固環3〇的立體圖；圖3B係鎖固 環30的俯視圖；圖3C則係鎖固環3〇的半剖面圖。 ^該鎖固環30具備有環狀之環狀部31。環狀部31 係具有沿關方向以特定間隔並從内緣侧朝徑方向切 除該環狀部31所形成的切除部32、以及沿圓周方向以 特定間隔而在該切除部32相異位置處並從外緣側朝 方向切除該環狀部31所形成的切除部34 (本實施形ς ^各有8處）。鎖固環3〇未形成有切除部”、34 份沿軸方向切斷後的剖面係為橫躺之略V字型。α 於環狀部31中兩相鄰切除部3 2之間所形成的凸部 33之中央部，亦即，切除部34所對應之徑方向内側位 201026984 置處係形成有爪扣部36。如圖4A所示，從圓周方向觀 之，該爪扣部36係沿環狀部31的V字型延伸方向朝V 字型之外側方向彎曲而延伸突出。爪扣部36的前端部 係形成尖銳而容易咬合於該管體40的形狀。 爪扣部36之圓周方向兩側係形成有鄰接該爪扣部 36的限制部38。如圖4B所示，限制部38係沿環狀部 31的V字型延伸方向朝V字型之内側方向彎曲而延伸 突出。限制部38的前端部38B係形成約略直角狀切除 的平坦形狀。接著，當爪扣部36咬合於管體40時，限 制部38之V字外側面38A會抵接至管體40的外緣周 面，藉以限制該爪扣部36對管體40的咬合程度。 鎖固環30之剖面係橫躺之略V字型，該環狀部31 之内緣側及外緣側總計設置有16個切除部32、34，故 其係可如擠壓該V字内側空間般地（V字型兩側延伸部 份互相靠近般）進行彈性變形。因此，隨著該管體40 插入該插入孔20，則鎖固環30係彈性變形而同心圓狀 地擴張圓徑。 其次，說明該管接頭10的功用。 當管體40插入至管接頭10的插入孔20時，如圖 5所示，因管體40前端而使得該鎖固環30之圓徑擴張。 接著，當管體40朝向深入側插入的同時，管體40之外 緣周面係與鎖固環30之爪扣部36磨擦接觸，直到管體 40之内緣周面接觸至Ο型環24、24。如該管體40繼續 插入，則該管體40前端係到達該本體部12的壁面13 11 201026984 處。 於圖5所不文裝狀態中’當管體40受到内部壓力 作用時’該管體40即會受到一從接頭本體16拔出方向 的作用力。因此’管體40及鎖固環30會朝插入孔2〇 拔出方向產生些許位移，如圖6所示，鎖固環3〇環狀 部31的外緣侧會抵接至套筒18的錐面18A。藉此，亦 如圖7所示，鎖固環30之爪扣部36係咬合至管體4〇 外緣側。此時，因為鎖固環30之爪扣部36係朝向接頭 本體16深入側而傾斜’故能輕易咬合至管體4〇，並且⑩ 該爪扣部36係朝向該管體40拔出方向的反方向，故管 體40不易脫落。 另·一方面’當鎖固環30之爪扣部36咬合至管體 40外緣周面時’形成於爪扣部36兩側的限制部38之v 字塑外側面38A則抵接於管體40外緣周面，故可限制 爪扣部36咬合超過一定程度以上。即，藉由限制部38 係可控制該爪扣部36對管體40之咬合程度，以預防爪 扣部36之咬合程度過多。 ❹ 又，於複數（本實施形態中係8個）個爪扣部36 兩侧設置有限制部38，可用以限制各爪扣部36的咬合 程度’使得爪扣部36對管體40之抓著力較穩定化。因 此’可預防管體40自插入孔20脫落（鬆脫）。 另一方面’如圖6所示的安裝狀態下欲使管體4〇 鬆脫之情況’可從插入孔2〇之入口部20A —侧插入一 專用工具’來將解除環22推向深入側。藉此，如圖8 12 201026984 所示，解除環22深入側的前端部22B係推動鎖固環30 之爪扣部36，使得該鎖固環30之圓徑擴張。此時，解 除環22之前端部22B推動並擴張該鎖固環30之爪扣部 36，同時係插入爪扣部36與管體40之間，使得爪扣部 36自管體40處拔出。於此狀態下便可將管體40自插 入孔20處拔出（使其鬆脫）。 本實施形態之管接頭10中，當鎖固環30之爪扣部 36咬合至管體40外緣周面時，因為該爪扣部36兩側 的限制部38之V字型外側面38A係抵接於管體40之 外緣周面，故可限制爪扣部36之咬合超過一定程度以 上。因此，能防止該爪扣部36對管體40之咬合程度過 多甚至因此貫穿該管體40。 另外，前述實施形態中，雖然該鎖固環30所形成 之限制部38的前端形狀係形成了約略直角狀切除的平 坦形狀，但本發明並未限定於此形狀。例如，如圖9所 示，限制部38之前端部38B亦可為朝向遠離管體40 之方向（徑方向外側）擴張圓徑所形成之V字型内側前 端之細錐形狀。 又，前述實施形態係說明了將爪扣部36形成於凸 部33中央部之範例，但爪扣部36並未限定於前述位 置。例如，如圖10所示，亦可將該爪扣部36移至凸部 33之圓周方向的一側而形成該爪扣部36。此時，限制 部38係可形成於凸部33中未形成有爪扣部36之另一 侧。又，此時限制部亦可形成如圖9所示之形狀。 13 201026984 又，前述實施形態中，雖然鎖固環30之爪扣部36 的個數係為8個，但本發明並未限定於前述樣態，亦可 為其他個數。又，爪扣部36與限制部38之尺寸及形狀 並未限定於此，亦可形成其他之樣態。 【圖式簡單說明】 圖1係本發明實施形態之管接頭的爆炸圖。 圖2係本發明實施形態之管接頭中，表示管體分離 狀態的半剖面圖。 圖3A係圖1所示管接頭所使用之鎖固環的立體圖。 圖3 B係圖丨所示管接頭所使用之鎖固環的俯視圖。 圖3C係鎖固環的半剖面圖。 圖4A係圖3B所示鎖固環之A_A線剖面圖。 圖4B係圖3B所示鎖固環之B_B線剖面圖。 ’管體於插入之 ’管體於結合狀 圖5係本發明實施形態之管接頭中 途中狀態的半剖面圖。 圖6係本發明實施形態之管接頭中 態的半剖面圖。 的部=圖圖6所示鎖固環之爪扣部咬合於管體之狀態The part is abutted on the front side adjacent to: Α' and is slightly V-shaped on the inner side of the part. Rough 14 inches. About the locking ring 30 to accommodate the subsequent detailed v word 20 entrance adjacent to 7 Π δ field. The tapered surface 18 is formed toward the diameter of the insertion hole 18 of the sleeve 18. The moving release ring has an inlet portion 2 〇Ι Α彳 ' along the axial direction of the pipe joint 10, and the doubling band in the circumferential direction of the insertion hole 20 is larger than the lock ring 30. Formed on the inner edge of the outer edge 18 of the release ring 22, the ridge portion 22A can be dropped by abutting against the sleeve. The protrusion t = to prevent its tear ring 30 彳 #22] B system front end is thin and along the lock-face: into ==:: week, set a 12 Α, in the outer edge groove $周面系1 There are 2 outer edge grooves 24. Each of them is embedded with a rubber type 0 ring. The main body portion 12 is added. (4) Please insert the deeper side. 201026984 The deepest part of the hole 20 has a wall surface i3 formed by expanding the outer diameter. The front end of the tubular body 40 abuts against the _ 13, so that the wall surface 13 serves as a stop for the tubular body 40 and 'in the opposite side of the main body portion opposite to the insertion hole, the side is formed to connect with other pipelines (4) , pattern 12B. Further, the end portion of the main body portion 12 opposite to the side of the insertion hole 2 is formed with a flange portion 12c for connecting another pipe body (not shown). The body portion 12 of the pipe joint 10 can be made of bronze; the intermediate portion 14, the sleeve 18 and the release ring 22 can be made of a tree; the lock ring 30 can be made of steel. In addition, the material of the tube 1G is various, and other materials can be used. Also, the tube body is made of 4G heterotrophic fat. Further, the tubular body 4 can be made of rubber or other soft components that are capable of engaging with the locking ring % claw portion. Figure 3 shows the locking ring 3〇 f - element used in the pipe joint 10 shown in Figure 1. Fig. 3A is a perspective view of the locking ring 3〇; Fig. 3B is a plan view of the locking ring 30; Fig. 3C is a half cross-sectional view of the locking ring 3〇. The lock ring 30 is provided with an annular portion 31 having an annular shape. The annular portion 31 has a cutout portion 32 formed by cutting the annular portion 31 at a certain interval in the closing direction from the inner edge side in the radial direction, and at a position different from the cutout portion 32 at a specific interval in the circumferential direction. The cut-away portion 34 formed by the annular portion 31 is cut away from the outer edge side direction (there are eight places in the present embodiment). The locking ring 3 is not formed with the cut-off portion", and the 34-section section cut along the axial direction is a slightly V-shaped cross-section. α is formed between the two adjacent cut-off portions 32 in the annular portion 31. The central portion of the convex portion 33, that is, the radially inward position 201026984 corresponding to the cut portion 34 is formed with a claw portion 36. As shown in Fig. 4A, the claw portion 36 is taken along the circumferential direction. The V-shaped extending direction of the annular portion 31 is curved to extend in the V-shaped outer side direction, and the tip end portion of the claw-fastening portion 36 is formed to be sharp and easily engaged with the tubular body 40. The circumferential direction of the claw-fastening portion 36 A restricting portion 38 that is adjacent to the claw-fastening portion 36 is formed on both sides. As shown in Fig. 4B, the restricting portion 38 is bent and extended toward the inner side of the V-shape along the V-shaped extending direction of the annular portion 31. The front end portion 38B of the portion 38 is formed into a flat shape that is cut at a substantially right angle. Then, when the claw portion 36 is engaged with the tubular body 40, the V-shaped outer side surface 38A of the restricting portion 38 abuts against the outer periphery of the tubular body 40. To limit the degree of engagement of the claw portion 36 with the tubular body 40. The cross section of the locking ring 30 is slightly V-shaped, The inner edge side and the outer edge side of the annular portion 31 are provided with a total of 16 cutout portions 32 and 34, so that the inner portion of the V-shaped space can be squeezed (the V-shaped extension portions are close to each other) The elastic deformation is performed. Therefore, as the tubular body 40 is inserted into the insertion hole 20, the locking ring 30 is elastically deformed to expand the circular diameter concentrically. Next, the function of the fitting 10 will be described. When the tubular body 40 is inserted When the insertion hole 20 of the pipe joint 10 is inserted, as shown in Fig. 5, the circular diameter of the lock ring 30 is expanded due to the front end of the pipe body 40. Next, while the pipe body 40 is inserted toward the deep side, the pipe body 40 is The outer peripheral surface is in frictional contact with the claw fastening portion 36 of the locking ring 30 until the inner peripheral edge of the tubular body 40 contacts the Ο-shaped ring 24, 24. If the tubular body 40 continues to be inserted, the front end of the tubular body 40 It is reached at the wall surface 13 11 201026984 of the body portion 12. In the state of FIG. 5, when the tube body 40 is subjected to internal pressure, the tube body 40 is subjected to a direction of pulling out from the joint body 16. Therefore, the tube 40 and the locking ring 30 will be slightly displaced toward the insertion hole 2, as shown in FIG. The outer edge side of the locking ring 3 〇 annular portion 31 abuts against the tapered surface 18A of the sleeve 18. Thereby, as shown in Fig. 7, the claw fastening portion 36 of the locking ring 30 is engaged to the tubular body. 4〇 The outer edge side. At this time, since the claw fastening portion 36 of the locking ring 30 is inclined toward the deep side of the joint body 16, it can be easily engaged to the tubular body 4〇, and 10 the claw fastening portion 36 is oriented toward the tube. The body 40 is pulled out in the opposite direction, so that the tubular body 40 is not easily detached. On the other hand, when the claw-fastening portion 36 of the locking ring 30 is engaged to the outer peripheral surface of the tubular body 40, it is formed on both sides of the claw-fastening portion 36. The v-shaped outer side surface 38A of the restricting portion 38 abuts against the outer peripheral surface of the tubular body 40, so that the claw-fastening portion 36 can be restricted from engaging more than a certain degree. That is, the degree of engagement of the claw portion 36 with the tubular body 40 can be controlled by the restricting portion 38 to prevent the degree of engagement of the claw portion 36 from being excessive. Further, in the plural (eight in the present embodiment), the claw portions 36 are provided with restricting portions 38 on both sides thereof, and can be used to limit the degree of engagement of the respective claw portions 36 so that the claw portions 36 are caught on the tubular body 40. The effort is more stable. Therefore, the preventable tubular body 40 is detached from the insertion hole 20 (released). On the other hand, 'in the mounted state shown in Fig. 6, in order to loosen the tubular body 4', a special tool 'can be inserted from the side of the inlet portion 20A of the insertion hole 2' to push the release ring 22 toward the deep side . Thereby, as shown in FIG. 8 12 201026984, the front end portion 22B of the release ring 22 on the deep side pushes the claw fastening portion 36 of the lock ring 30 such that the circular diameter of the lock ring 30 is expanded. At this time, the front end portion 22B of the release ring 22 pushes and expands the claw button portion 36 of the lock ring 30 while being inserted between the claw button portion 36 and the tube body 40, so that the claw button portion 36 is pulled out from the tube body 40. . In this state, the tubular body 40 can be pulled out from the insertion hole 20 (to make it loose). In the pipe joint 10 of the present embodiment, when the claw fastening portion 36 of the lock ring 30 is engaged to the outer peripheral surface of the pipe body 40, the V-shaped outer side surface 38A of the restricting portion 38 on both sides of the claw button portion 36 is Since the outer peripheral edge of the tubular body 40 is in contact with each other, the engagement of the claw-and-buckle portion 36 can be restricted to more than a certain extent. Therefore, it is possible to prevent the claw portion 36 from being excessively engaged with the tubular body 40 or even penetrating the tubular body 40. Further, in the above-described embodiment, the distal end shape of the restricting portion 38 formed by the lock ring 30 is formed into a flat shape which is cut at a substantially right angle, but the present invention is not limited to this shape. For example, as shown in Fig. 9, the front end portion 38B of the restricting portion 38 may have a tapered shape of a V-shaped inner front end formed by expanding a circular diameter in a direction away from the tubular body 40 (outside in the radial direction). Further, in the above embodiment, the example in which the claw portion 36 is formed in the central portion of the convex portion 33 has been described, but the claw portion 36 is not limited to the above position. For example, as shown in Fig. 10, the claw portion 36 may be moved to one side in the circumferential direction of the convex portion 33 to form the claw portion 36. At this time, the restricting portion 38 can be formed on the other side of the convex portion 33 where the claw portion 36 is not formed. Further, at this time, the restricting portion may be formed in a shape as shown in FIG. Further, in the above-described embodiment, the number of the claw fastening portions 36 of the lock ring 30 is eight, but the present invention is not limited to the above-described embodiment, and may be other numbers. Further, the size and shape of the claw portion 36 and the restricting portion 38 are not limited thereto, and other forms may be formed. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded view of a pipe joint according to an embodiment of the present invention. Fig. 2 is a half cross-sectional view showing a state in which a pipe body is separated in a pipe joint according to an embodiment of the present invention. Figure 3A is a perspective view of the locking ring used in the pipe joint of Figure 1. Figure 3B is a top plan view of the locking ring used in the pipe joint shown in Figure 。. Figure 3C is a half cross-sectional view of the locking ring. 4A is a cross-sectional view of the lock ring of FIG. 3B taken along line A_A. 4B is a cross-sectional view taken along line B_B of the lock ring shown in FIG. 3B. Fig. 5 is a half cross-sectional view showing the state of the pipe joint of the embodiment of the present invention. Fig. 6 is a half cross-sectional view showing the state of the pipe joint of the embodiment of the present invention. The part of the lock ring of the lock ring shown in Fig. 6 is in the state of the pipe body
、圖8係本發明實施形態之管接頭中，為了使管體鬆 脫而解除鎖固環咬合之狀態的半剖面圖。 A 圖9係本發明鎖固環之限制部的變形例剖面圖。 圖10係本發明鎖固環之爪扣部及限制部形成位置 201026984 的變形例俯視圖。Fig. 8 is a half cross-sectional view showing a state in which the lock ring is engaged in order to release the tubular body in the pipe joint according to the embodiment of the present invention. A Fig. 9 is a cross-sectional view showing a modification of the restricting portion of the lock ring of the present invention. Fig. 10 is a plan view showing a modification of the claw fastening portion of the lock ring of the present invention and the restriction portion forming position 201026984.
【主要元件符號說明】 10 管接頭 12 本體部 12A 外緣溝槽 12B 陰螺紋 12C 凸緣部 13 壁面 14 中間部 14A 前端部 16 接頭本體 18 套筒 18A 錐面 18B 短徑部 20 插入孔 20A 入口部 22 解除環 22A 突起部 22B 前端部 24 〇型環 30 鎖固環 30A 開口部 31 環狀部 32 切除部 33 凸部 34 切除部 36 爪扣部 38 限制部 38A 開口部 38B 前端部 40 管體 15[Main component symbol description] 10 Pipe joint 12 Main body portion 12A Outer edge groove 12B Female thread 12C Flange portion 13 Wall surface 14 Intermediate portion 14A Front end portion 16 Joint body 18 Sleeve 18A Cone surface 18B Short diameter portion 20 Insert hole 20A Entrance Portion 22 Release ring 22A Projection portion 22B Front end portion 24 〇-ring 30 Locking ring 30A Opening portion 31 Annular portion 32 Cutting portion 33 Projection portion 34 Cutting portion 36 Claw portion 38 Restricting portion 38A Opening portion 38B Front end portion 40 Tube body 15