JP2010236652A - Separation preventing pipe joint and pipe - Google Patents

Separation preventing pipe joint and pipe Download PDF

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JP2010236652A
JP2010236652A JP2009086494A JP2009086494A JP2010236652A JP 2010236652 A JP2010236652 A JP 2010236652A JP 2009086494 A JP2009086494 A JP 2009086494A JP 2009086494 A JP2009086494 A JP 2009086494A JP 2010236652 A JP2010236652 A JP 2010236652A
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opening
receiving port
port
pipe joint
separation preventing
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JP5307599B2 (en
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Hiroyuki Totsugi
浩之 戸次
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Waterworks Technology Development Organization Co Ltd
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Waterworks Technology Development Organization Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a separation preventing pipe joint for easily drawing a spigot into a socket in an appropriate posture and preventing interference between a swelling part provided in the spigot to prevent bending and a separation preventing member, and a pipe usable for the separation prevention pipe joint. <P>SOLUTION: The separation preventing pipe joint includes: a seal member 3 for sealing between the inner periphery of the socket 1 and the outer periphery of the spigot 2 inserted to the socket 1; the separation preventing member 4 arranged between the seal member 3 and an end face 11a of an opening 11 of the socket 1 and engaged with the outer periphery of the spigot 2 to prevent separation of the spigot 2 from the socket 1; the swelling part 22 provided on the outer periphery of the spigot 2 to fill a clearance between the inner peripheral face of the opening 11 of the socket 1 and the outer peripheral face of the spigot 2; a stopper 23 provided on the outer periphery of the spigot 2 to project to the outer side in the pipe diameter direction from the swelling part 22; and a flange part 16 extended from the opening 11 of the socket 1 to the pipe axial direction, receiving the stopper 23 from the pipe axial direction while allowing insertion of the swelling part 22, and regulating entry of the swelling part 22 so as not to interfere with the separation preventing member 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、受口とこれに挿入接続された挿口とが管軸方向に離脱するのを防止する離脱防止管継手と、これに使用できる管に関する。   The present invention relates to a detachment prevention pipe joint that prevents a receiving port and an insertion port that is inserted and connected to the receiving port from detaching in the direction of the tube axis, and a tube that can be used therefor.

図7は、下記特許文献1に記載された離脱防止管継手の断面図である。受口81の内部にはシール材83が装着され、このシール材83が受口81の内周とこれに挿入された挿口82の外周との間を密封している。挿口82の先端の外周には、受口81の内部に収容されたロックリング84と係合する突起86が設けられ、受口81からの挿口82の離脱を防止できるように構成されている。ゴム輪85は、ロックリング84の芯出しを行うために装着されている。   FIG. 7 is a cross-sectional view of a detachment prevention pipe joint described in Patent Document 1 below. A sealing material 83 is mounted inside the receiving port 81, and the sealing material 83 seals between the inner periphery of the receiving port 81 and the outer periphery of the insertion port 82 inserted therein. A protrusion 86 that engages with a lock ring 84 housed inside the receiving port 81 is provided on the outer periphery of the distal end of the insertion port 82, and is configured to prevent the insertion port 82 from being detached from the receiving port 81. Yes. The rubber ring 85 is attached to center the lock ring 84.

この種の管継手では、接続時に挿口82の突起86が通過できるように、受口81の開口部87の内径が大きく形成されているため、開口部87の内周面と挿口82の外周面との間に或る程度の隙間が生じる。この隙間は、受口挿口間に屈曲機能を付与するのに役立つものではあるが、曲管等の異形管が接続されている場合には、不平均力の作用により接続状態を不安定にするものである。そこで、図7の管継手では、この隙間を埋める隆起部88を挿口82の外周に設け、それにより受口挿口間の屈曲を防止している。ライナ91は、受口挿口間の伸縮防止のために装着され、ゴム輪92により芯出しされている。   In this type of pipe joint, since the inner diameter of the opening 87 of the receiving port 81 is formed large so that the projection 86 of the insertion port 82 can pass during connection, the inner peripheral surface of the opening 87 and the insertion port 82 A certain amount of gap is generated between the outer peripheral surface. This gap is useful for providing a bending function between the insertion openings, but when a deformed pipe such as a curved pipe is connected, the connection state becomes unstable due to the action of an unbalanced force. To do. Therefore, in the pipe joint of FIG. 7, a raised portion 88 that fills this gap is provided on the outer periphery of the insertion opening 82, thereby preventing bending between the reception opening. The liner 91 is mounted to prevent expansion / contraction between the receiving opening and is centered by a rubber ring 92.

この管継手は、スリップオンタイプの管継手であり、受口81内に挿口82を挿入することによってシール材83を圧縮し、受口81と挿口82とを密封状態で接続することができる。一般には、レバーブロック等の連結具で受口81と挿口82を連結し、その連結具に設けたジャッキを介して挿口82を受口81に近接移動させ、受口81内に挿口82を引き入れる。挿口82の外周に設けたストッパ89は、この連結具との係合に利用される。   This pipe joint is a slip-on type pipe joint, and by inserting the insertion port 82 into the receiving port 81, the sealing material 83 is compressed, and the receiving port 81 and the insertion port 82 can be connected in a sealed state. it can. In general, the receiving port 81 and the insertion port 82 are connected by a connecting tool such as a lever block, and the insertion port 82 is moved close to the receiving port 81 via a jack provided in the connecting device, and the insertion port 81 is inserted into the receiving port 81. Pull in 82. A stopper 89 provided on the outer periphery of the insertion opening 82 is used for engagement with the connector.

ところで、管継手としては、下記特許文献2,3に開示されているように、上記のようなロックリングに代えて、シール材と受口の開口部の端面との間に離脱防止部材を設けたものがある。かかる構造の管継手では、挿口の外周面に離脱防止部材を係合させることにより、受口からの挿口の離脱を防止することができる。しかし、受口の開口部の近くに離脱防止部材が設けられることから、下記に示すような問題があった。
(i)挿口の仮預けが難しく不安定になるため、接続時に受口内に引き入れた挿口が斜めになり易く、挿口がシール材を押圧して損傷させる恐れがある。ここで言う「挿口の仮預け」とは、挿口の先端を受口の開口部に僅かばかり載せて仮置きすることを指す。
(ii)挿口に設けた屈曲防止用の隆起部が離脱防止部材と干渉する位置に配されることにより、離脱防止部材による離脱防止機能を阻害してしまう。
By the way, as disclosed in Patent Documents 2 and 3 below, as a pipe joint, instead of the lock ring as described above, a separation preventing member is provided between the sealing material and the end face of the opening of the receiving port. There is something. In the pipe joint having such a structure, it is possible to prevent the insertion opening from being removed from the receiving opening by engaging the separation preventing member with the outer peripheral surface of the insertion opening. However, since the separation preventing member is provided near the opening of the receiving port, there are the following problems.
(I) Since the insertion of the insertion port is difficult and unstable, the insertion port that is drawn into the reception port at the time of connection is likely to be inclined, and the insertion port may press the seal material and damage it. The “temporary deposit of the insertion opening” referred to here means that the tip of the insertion opening is temporarily placed on the opening of the receiving opening and placed temporarily.
(Ii) The bend prevention raised portion provided in the insertion opening is disposed at a position where it interferes with the separation preventing member, thereby inhibiting the separation preventing function of the separation preventing member.

特開平7−332555号公報JP 7-332555 A 特開昭61−88091号公報JP-A-61-88091 特開2006−342954号公報JP 2006-342594 A

本発明は上記実情に鑑みてなされたものであり、その目的は、挿口を受口内に適正な姿勢で簡単に引き入れることができ、挿口に設けた屈曲防止用の隆起部と離脱防止部材との干渉を防止することができる離脱防止管継手と、これに使用できる管を提供することにある。   The present invention has been made in view of the above circumstances, and an object of the present invention is to be able to easily draw the insertion port into the receiving port in an appropriate posture, and to provide a bending-preventing raised portion and a separation preventing member provided in the insertion port. It is an object of the present invention to provide a detachment prevention pipe joint that can prevent interference with the pipe and a pipe that can be used therefor.

上記目的は、下記の如き本発明により達成することができる。即ち、本発明の離脱防止管継手は、受口の内周と前記受口に挿入された挿口の外周との間を密封するシール材と、前記シール材と前記受口の開口部の端面との間に配設され、前記挿口の外周面に係合して前記受口からの前記挿口の離脱を防止する離脱防止部材と、前記挿口の外周に設けられ、前記受口の開口部の内周面と前記挿口の外周面との間の隙間を埋める隆起部と、前記挿口の外周に、前記隆起部よりも管径方向外側に突き出して設けられたストッパと、前記受口の開口部から管軸方向に延出し、前記隆起部の挿入を許容しつつ前記ストッパを管軸方向から受け止め、前記離脱防止部材と干渉しないように前記隆起部の進入を規制する鍔部とを備えるものである。   The above object can be achieved by the present invention as described below. That is, the separation preventing pipe joint of the present invention includes a sealing material that seals between an inner periphery of a receiving port and an outer periphery of an insertion port that is inserted into the receiving port, and an end surface of the sealing material and the opening of the receiving port. A detachment preventing member that engages with an outer peripheral surface of the insertion opening and prevents the insertion opening from being removed from the receiving opening, and is provided on an outer periphery of the insertion opening. A raised portion that fills a gap between the inner peripheral surface of the opening and the outer peripheral surface of the insertion port, and a stopper that is provided on the outer periphery of the insertion port so as to protrude outward in the tube diameter direction from the raised portion, A flange that extends from the opening of the receiving port in the tube axis direction, receives the stopper from the tube axis direction while allowing the protrusion to be inserted, and restricts the entry of the ridge so as not to interfere with the separation preventing member. Are provided.

本発明に係る離脱防止管継手では、受口の開口部から管軸方向に延出する鍔部を備えていることにより、接続時には、挿口の先端を鍔部上に載置することで安定して仮預けでき、しかも鍔部によるガイド作用を奏し得ることから、挿口を斜めにすることなく適正な姿勢で簡単に引き入れることができる。また、挿口の外周には、受口の開口部の内周面と挿口の外周面との間の隙間を埋める隆起部が設けられているため、受口挿口間に屈曲防止機能が付与される。それでいて、挿口のストッパを鍔部が受け止めて隆起部の進入を規制することにより、隆起部と離脱防止部材との干渉を防いで、管継手の離脱防止機能を確保することができる。   The separation preventing pipe joint according to the present invention includes a flange portion extending in the tube axis direction from the opening portion of the receiving port, so that it is stable by placing the tip of the insertion port on the flange portion at the time of connection. In addition, since it can be temporarily deposited and the guide action by the buttocks can be obtained, it can be easily pulled in with an appropriate posture without making the insertion opening oblique. In addition, the outer periphery of the insertion opening is provided with a raised portion that fills the gap between the inner peripheral surface of the opening of the receiving opening and the outer peripheral surface of the insertion opening. Is granted. Nevertheless, the hook portion receives the stopper of the insertion opening and restricts the entry of the raised portion, thereby preventing the raised portion and the separation preventing member from interfering with each other, thereby ensuring the function of preventing the separation of the pipe joint.

本発明の好ましい実施形態として、前記離脱防止部材が、前記受口の開口部を側壁とする収容溝に収容されているものが挙げられる。かかる場合には、開口部において挿口を載置可能な領域が少なくなり、挿口の仮預けが非常に難しくなるため、鍔部を利用して挿口を安定して仮預けできる本発明が特に有用となる。   As a preferred embodiment of the present invention, a member in which the separation preventing member is accommodated in an accommodation groove having an opening of the receiving port as a side wall can be mentioned. In such a case, the area in which the insertion slot can be placed is reduced in the opening, and provisional storage of the insertion slot becomes very difficult.Therefore, the present invention can stably deposit the insertion slot using the collar. Especially useful.

本発明の管継手では、前記鍔部が前記ストッパを受け止めたときに、前記受口の開口部から前記鍔部の先端までの範囲に亘って、前記受口の内周面と前記挿口の外周面との間の隙間を前記隆起部が埋めるものが好ましい。かかる構成によれば、隆起部が隙間を埋める範囲を広くできることから、受口挿口間の屈曲防止機能を良好に確保できる。   In the pipe joint according to the aspect of the invention, when the flange receives the stopper, the inner peripheral surface of the receiving port and the insertion port extend over a range from the opening of the receiving port to the tip of the flange. It is preferable that the raised portion fills the gap between the outer peripheral surface. According to such a configuration, since the range in which the raised portion fills the gap can be widened, it is possible to satisfactorily ensure the function of preventing bending between the receiving opening.

本発明の管継手では、前記鍔部が周方向に沿った帯状に形成されていることが好ましい。これにより、挿口を仮預けし易くなるため、施工性が向上する。また、管外の異物が離脱防止部材に混入し難くなるため、防塵効果を高めて離脱防止機能を良好に保持できる。   In the pipe joint of the present invention, it is preferable that the flange portion is formed in a belt shape along the circumferential direction. Thereby, since it becomes easy to deposit an insertion opening temporarily, workability | operativity improves. In addition, foreign matter outside the tube is less likely to enter the separation preventing member, so that the dust prevention effect can be enhanced and the separation prevention function can be satisfactorily maintained.

本発明の管継手では、前記鍔部が、前記離脱防止部材から離れる方向に向かって内径を漸増させることが好ましい。これにより、挿口を仮預けし易くなるうえ、受口内に挿口を容易く引き入れることができるため、施工性が向上する。   In the pipe joint according to the aspect of the invention, it is preferable that the flange gradually increases the inner diameter in a direction away from the separation preventing member. Thereby, it becomes easy to temporarily deposit the insertion opening, and the insertion opening can be easily pulled into the receiving opening, so that workability is improved.

本発明の管継手では、前記鍔部に形成した嵌入孔に前記ストッパを嵌入することにより、前記受口と前記挿口との相対回転を防止可能に構成されているものでもよい。かかる構成によれば、ストッパと鍔部とを周方向に係止させて受口挿口間の相対回転を防止できることから、管継手の接続状態を良好に安定化できる。   The pipe joint of the present invention may be configured to prevent relative rotation between the receiving port and the insertion port by inserting the stopper into an insertion hole formed in the flange portion. According to such a configuration, the stopper and the collar can be locked in the circumferential direction to prevent relative rotation between the receiving opening, so that the connection state of the pipe joint can be satisfactorily stabilized.

また、本発明に係る管は、シール材を内周側に装着可能な受口を有する管において、前記受口の開口部の内周面を延長させるようにして、前記開口部の端面から管軸方向に延出する鍔部が設けられたものである。この管は上記の如き管継手に使用できるものであり、既述のように挿口を受口内に適正な姿勢で簡単に引き入れたり、挿口に設けた屈曲防止用の隆起部と離脱防止部材との干渉を防止したりできる。なお、この管であれば、受口に挿入される挿口が屈曲防止用の隆起部を具備しないものであっても、接続時に挿口を仮預けし易くなるという利点があり、施工性を向上することができる。   Further, the pipe according to the present invention is a pipe having a receiving port to which a sealing material can be attached on the inner peripheral side, and extends from the end surface of the opening so as to extend the inner peripheral surface of the opening of the receiving port. A collar portion extending in the axial direction is provided. This pipe can be used for the pipe joint as described above, and as described above, the insertion port can be easily drawn into the receiving port in an appropriate posture, or the bending-preventing bulge and the separation preventing member provided in the insertion port. Can be prevented. If this tube is used, even if the insertion port inserted into the receiving port does not have a raised portion for preventing bending, there is an advantage that it is easy to temporarily deposit the insertion port at the time of connection. Can be improved.

本発明の一実施形態に係る離脱防止管継手を示す図The figure which shows the detachment prevention pipe joint which concerns on one Embodiment of this invention. 受口の正面図Front view of the socket 挿口の側面図Side view of the insertion 図3のA−A矢視断面図AA arrow sectional view of FIG. 挿口を仮預けした状態を示す断面図Sectional drawing which shows the state which carried out temporary deposit of the mouth 本発明の別実施形態に係る離脱防止管継手を示す側面図The side view which shows the detachment prevention pipe joint which concerns on another embodiment of this invention. 特許文献1に記載された離脱防止管継手を示す断面図Sectional drawing which shows the separation prevention pipe joint described in patent document 1

以下、本発明の実施の形態について図面を参照しながら説明する。図1は、本発明の一実施形態に係る離脱防止管継手を示す図であり、上半分が断面図を、下半分が側面図を示している。本実施形態では、直線状に延びる直管10と異形管である曲管20との接続部分に、本発明の管継手を適用したものを例示する。図1の管継手は、直管10の受口1に曲管20の挿口2を挿入接続しており、直管10及び曲管20は、何れも水道管として利用可能なダクタイル鋳鉄管である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a detachment prevention pipe joint according to an embodiment of the present invention, in which an upper half shows a cross-sectional view and a lower half shows a side view. In the present embodiment, an example in which the pipe joint of the present invention is applied to a connecting portion between a straight pipe 10 that extends in a straight line and a curved pipe 20 that is a deformed pipe is illustrated. The pipe joint shown in FIG. 1 has an insertion port 2 of a curved pipe 20 inserted and connected to a receiving port 1 of a straight pipe 10, and the straight pipe 10 and the curved pipe 20 are both ductile cast iron pipes that can be used as water pipes. is there.

受口1の開口部11よりも奥側の内周面には嵌合溝12が形成され、この嵌合溝12に環状のシール材3が装着されている。シール材3は受口1の内周と挿口2の外周との間を密封し、それにより直管10と曲管20とが水密に接続される。また、シール材3と開口部11の端面11aとの間には離脱防止部材4が配設され、これが挿口2の外周面に係合することにより、受口1からの挿口2の離脱を防止できるように構成されている。離脱防止部材4は、開口部11を側壁とする収容溝13に収容され、その内周面には爪部41が形成されている。   A fitting groove 12 is formed on the inner peripheral surface on the back side of the opening 11 of the receiving port 1, and an annular sealing material 3 is attached to the fitting groove 12. The sealing material 3 seals between the inner periphery of the receiving port 1 and the outer periphery of the insertion port 2, whereby the straight pipe 10 and the curved pipe 20 are connected in a watertight manner. Further, a separation preventing member 4 is disposed between the sealing material 3 and the end surface 11 a of the opening 11, and this engages with the outer peripheral surface of the insertion port 2, whereby the insertion port 2 is detached from the receiving port 1. It is comprised so that it can prevent. The separation preventing member 4 is accommodated in an accommodation groove 13 having the opening 11 as a side wall, and a claw portion 41 is formed on the inner peripheral surface thereof.

開口部11には受口1を貫通するネジ孔14が穿設されており、このネジ孔14に螺合された押ボルト5を操作して離脱防止部材4を管径方向外側から押圧することで、挿口2の外周面に爪部41が食い込み、離脱防止部材4を挿口2に強固に係合させることができる。そのうえ、受口1から挿口2を引き抜く方向の力が作用した際に楔効果が発揮されるように、離脱防止部材4の外周面が傾斜しており、爪部41の食い込み作用との協働によって、管継手の離脱を強固に防止することができる。   A screw hole 14 penetrating the receiving hole 1 is formed in the opening 11, and the push-off bolt 5 screwed into the screw hole 14 is operated to press the separation preventing member 4 from the outside in the pipe radial direction. Thus, the claw portion 41 bites into the outer peripheral surface of the insertion slot 2, and the separation preventing member 4 can be firmly engaged with the insertion slot 2. In addition, the outer peripheral surface of the separation preventing member 4 is inclined so that the wedge effect is exerted when a force in the direction of pulling out the insertion slot 2 from the receptacle 1 is applied, and cooperation with the biting action of the claw portion 41 is achieved. Due to the action, the detachment of the pipe joint can be firmly prevented.

図2は、受口1を開口部11側(図1左側)から見た正面図である。図2では隠れていて見えないが、離脱防止部材4は、正面視にて円弧状になすと共に周方向の複数箇所(本実施形態では六箇所)に配設され、その各々に対応して押ボルト5が取り付けられている。受口1の周方向の二箇所には、受口1と挿口2とを接続するに際して、受口1に連結具を取り付けるための連通孔15が設けられている。   FIG. 2 is a front view of the receiving port 1 as viewed from the opening 11 side (left side of FIG. 1). Although it is hidden and not visible in FIG. 2, the separation preventing member 4 is formed in an arc shape when viewed from the front and is disposed at a plurality of circumferential positions (six positions in the present embodiment). Bolts 5 are attached. At two locations in the circumferential direction of the receiving port 1, communication holes 15 for attaching a connecting tool to the receiving port 1 when connecting the receiving port 1 and the insertion port 2 are provided.

受口1は、挿口2の周方向全域に爪部41の接触領域を形成可能に構成されており、周方向に隣り合った離脱防止部材4同士の間では、それぞれが挿口2の外周面に係合した状態で、一方の爪部41と他方の爪部41とが管軸方向に互いに重なるように配置される。かかる構造の離脱防止部材は、本出願人による特開2008−309186号公報に詳しい。この場合、周方向の何処の箇所においても離脱防止部材4に挿口2の隆起部22が干渉し得ることになるため、本発明が極めて有用となる。   The receiving port 1 is configured to be able to form a contact region of the claw portion 41 in the entire circumferential direction of the insertion port 2, and each of the outer periphery of the insertion port 2 is between the separation preventing members 4 adjacent to each other in the circumferential direction. One claw portion 41 and the other claw portion 41 are arranged so as to overlap each other in the tube axis direction while being engaged with the surface. A detachment preventing member having such a structure is detailed in Japanese Patent Application Laid-Open No. 2008-309186 by the present applicant. In this case, since the raised portion 22 of the insertion opening 2 can interfere with the separation preventing member 4 at any location in the circumferential direction, the present invention is extremely useful.

図1に示すように、挿口2の先端の外周には突起21が設けられており、管継手が接続された状態では、シール材3よりも奥側に突起21が配置される。突起21は、図7で示したような受口81と接続した場合には、ロックリングと係合して離脱防止機能を発揮し得るものであるが、本発明の管継手では直接的に機能しないため、無くても構わない。本発明の管継手では、離脱防止部材4よりも奥側にシール材3が配設されることから、離脱防止部材4を管内の水に接触させることなく、錆の発生を避けることができる。   As shown in FIG. 1, a protrusion 21 is provided on the outer periphery of the distal end of the insertion slot 2, and the protrusion 21 is disposed on the back side of the sealing material 3 in a state where the pipe joint is connected. When the projection 21 is connected to the receiving port 81 as shown in FIG. 7, it can be engaged with the lock ring to exhibit a separation preventing function. However, the projection 21 functions directly in the pipe joint of the present invention. You do n’t have to. In the pipe joint of the present invention, since the sealing material 3 is disposed on the back side of the separation preventing member 4, the occurrence of rust can be avoided without bringing the separation preventing member 4 into contact with water in the pipe.

受口1内に挿口2を適正量だけ挿し込んだ状態において、離脱防止部材4よりも受口1の開口側となる挿口2の外周には、開口部11の内径よりも小さい外径を有する隆起部22が設けられており、これらが受口1の開口部11の内周面と挿口2の外周面との間の隙間を埋めることで、受口挿口間の屈曲を防止できるように構成されている。隆起部22は、図3,4に示すように、周方向の複数箇所(本実施形態では八箇所)に設けられ、正面視にて台形状をなすが、本発明はこれに限られない。   In a state in which the insertion port 2 is inserted into the receiving port 1 by an appropriate amount, the outer diameter of the insertion port 2 on the opening side of the receiving port 1 relative to the separation preventing member 4 is smaller than the inner diameter of the opening 11. Are provided, and these fill the gap between the inner peripheral surface of the opening 11 of the receiving port 1 and the outer peripheral surface of the insertion port 2 to prevent bending between the receiving port insertion ports. It is configured to be able to. As shown in FIGS. 3 and 4, the raised portions 22 are provided at a plurality of locations in the circumferential direction (eight locations in the present embodiment) and have a trapezoidal shape when viewed from the front, but the present invention is not limited thereto.

また、挿口2の外周には、開口部11の端面11aから少し距離を置いた位置にて、隆起部22や開口部11の内周面よりも管径方向外側に突き出したストッパ23が設けられている。ストッパ23は、図3,4に示すように、周方向の複数箇所(本実施形態では四箇所)に設けられており、その各々が円柱状に形成されている。本実施形態では、一つ置きの隆起部22に対応した位置にストッパ23を設けているが、本発明はこれに限られない。隆起部22とストッパ23は、それぞれが挿口2の外周に一体的に設けられている。   Further, a stopper 23 is provided on the outer periphery of the insertion slot 2 at a position slightly spaced from the end surface 11a of the opening 11 and protrudes outwardly in the pipe diameter direction from the ridge 22 and the inner peripheral surface of the opening 11. It has been. As shown in FIGS. 3 and 4, the stoppers 23 are provided at a plurality of locations in the circumferential direction (four locations in the present embodiment), each of which is formed in a columnar shape. In this embodiment, the stopper 23 is provided at a position corresponding to every other raised portion 22, but the present invention is not limited to this. The raised portion 22 and the stopper 23 are integrally provided on the outer periphery of the insertion opening 2.

図1に示すように、受口1には、開口部11の端面11aの内周部から管軸方向に沿って延出した鍔部16が設けられている。鍔部16は、隆起部22の外径よりも大きい内径を有し、受口1内に挿口2を引き入れたときに隆起部22の挿入を許容する。更に、挿口2を受口1内に適正量を挿し込んだ時点で、ストッパ23を管軸方向から受け止め、離脱防止部材4と干渉しないように隆起部22の進入を規制する。この状態において、隆起部22は、受口1の開口部11から鍔部16の先端までの範囲に亘り、受口1の内周面と挿口2の外周面との間の隙間を埋めている。   As shown in FIG. 1, the receiving port 1 is provided with a flange portion 16 that extends from the inner peripheral portion of the end surface 11 a of the opening portion 11 along the tube axis direction. The flange portion 16 has an inner diameter larger than the outer diameter of the raised portion 22 and allows the raised portion 22 to be inserted when the insertion port 2 is drawn into the receiving port 1. Further, when an appropriate amount of the insertion port 2 is inserted into the receiving port 1, the stopper 23 is received from the tube axis direction and the entry of the raised portion 22 is restricted so as not to interfere with the separation preventing member 4. In this state, the raised portion 22 fills a gap between the inner peripheral surface of the receiving port 1 and the outer peripheral surface of the insertion port 2 over the range from the opening 11 of the receiving port 1 to the tip of the flange portion 16. Yes.

この管継手は、スリップオンタイプの管継手であるため、受口1内に挿口2を挿入することによってシール材3を圧縮し、受口1と挿口2とを水密に接続できる。以下、この管継手の接続手順の一例を説明する。   Since this pipe joint is a slip-on type pipe joint, the seal member 3 can be compressed by inserting the insertion opening 2 into the reception opening 1 and the reception opening 1 and the insertion opening 2 can be connected in a watertight manner. Hereinafter, an example of the connection procedure of the pipe joint will be described.

まず、受口1の嵌合溝12にシール材3を装着すると共に、押ボルト5を操作して離脱防止部材4を管径方向外側に移動させておく。次に、受口1と挿口2をレバーブロック等の連結具(不図示)で連結した後、その連結具に設けたジャッキを介して挿口2を受口1に近接移動させ、受口1内に挿口2を引き入れる。この連結具を用いた作業は、施工性や安全性を考慮して、受口1と挿口2とを適度に芯出しした状態で行われ、この芯出しのために挿口2の仮預けが実施される。   First, the sealing material 3 is mounted in the fitting groove 12 of the receiving port 1 and the push bolt 5 is operated to move the separation preventing member 4 outward in the pipe diameter direction. Next, after connecting the receiving port 1 and the insertion port 2 with a connecting tool (not shown) such as a lever block, the insertion port 2 is moved close to the receiving port 1 via a jack provided on the connecting device, and the receiving port Pull the insertion slot 2 into 1. The work using this connector is performed in a state where the receiving port 1 and the insertion port 2 are properly centered in consideration of workability and safety, and the insertion port 2 is temporarily deposited for this alignment. Is implemented.

この管継手では、図5に示すように、挿口2の先端を鍔部16上に載置できることから、挿口2を安定して仮預けできる。この仮預けの状態から、受口1と挿口2に連結具を連結し、ジャッキを介して挿口2を受口1に近接移動させることで、挿口2が受口1内に引き入れられる。このとき、安定した仮預けにより芯出しが適切になされていると共に、鍔部16によりガイド作用が奏されることから、挿口2を斜めにすることなく適正な姿勢で簡単に引き入れることができる。また、鍔部16が周方向に沿った帯状をなし、離脱防止部材4から離れる方向に向かって内径を僅かに漸増させていることから、挿口2の仮預けと受口1内への引き込みが更に簡便になり、施工性が向上する。   In this pipe joint, as shown in FIG. 5, since the tip of the insertion slot 2 can be placed on the flange portion 16, the insertion slot 2 can be temporarily deposited in a stable manner. From this temporary deposit state, the insertion port 2 is drawn into the reception port 1 by connecting a connector to the reception port 1 and the insertion port 2 and moving the insertion port 2 close to the reception port 1 via a jack. . At this time, centering is properly performed by stable temporary deposit and a guide action is provided by the flange portion 16, so that the insertion port 2 can be easily pulled in with an appropriate posture without being inclined. . Further, since the flange portion 16 has a belt-like shape along the circumferential direction, and the inner diameter is gradually increased toward the direction away from the separation preventing member 4, the temporary insertion of the insertion port 2 and the drawing into the receiving port 1 are performed. Is further simplified and the workability is improved.

これに対して、受口1に鍔部16を設けていない場合には、開口部11を側壁とする収容溝13に離脱防止部材4が収容されていることから、挿口2の先端を仮置きできる領域が少なく、挿口2の仮預けが非常に困難である。そのため、挿口2を受口1内に引き入れるに際し、挿口2が偏心して斜めになり易く、挿口2がシール材3を押圧して損傷させてしまう場合がある。   On the other hand, when the flange portion 16 is not provided in the receiving port 1, the separation preventing member 4 is accommodated in the accommodating groove 13 having the opening portion 11 as a side wall. The area that can be placed is small, and it is very difficult to temporarily deposit the insertion slot 2. Therefore, when the insertion opening 2 is pulled into the receiving opening 1, the insertion opening 2 tends to be eccentric and inclined, and the insertion opening 2 may press the seal material 3 and damage it.

本発明の管継手では、受口1に挿口2を挿し込んでいく過程で、挿口2の先端が離脱防止部材4やシール材3の内周を通過し、隆起部22が鍔部16や開口部11の内周に侵入する。そして、適正量が挿し込まれた時点で、図1に示すように鍔部16がストッパ23を管軸方向から受け止め、受口1と挿口2との相対移動が規制される。したがって、接続時には、鍔部16がストッパ23を受け止めるまで挿入作業を続ければよく、挿口2の挿入に関して寸法計測等の作業が不要であるため、管軸方向の位置決めが非常に簡単になる。   In the pipe joint of the present invention, in the process of inserting the insertion port 2 into the receiving port 1, the tip of the insertion port 2 passes through the inner periphery of the separation preventing member 4 and the sealing material 3, and the raised portion 22 is the flange portion 16. Or enters the inner periphery of the opening 11. When the appropriate amount is inserted, the flange 16 receives the stopper 23 from the tube axis direction as shown in FIG. 1, and the relative movement between the receiving port 1 and the inserting port 2 is restricted. Therefore, at the time of connection, it is only necessary to continue the insertion work until the flange portion 16 receives the stopper 23, and the work such as the dimension measurement is not necessary for the insertion of the insertion slot 2, so that the positioning in the tube axis direction becomes very simple.

挿口2の挿入を完了した後は、連結具を取り外し、押ボルト5を操作して離脱防止部材4の爪部41を挿口2の外周面に食い込ませる。既述のように、鍔部16がストッパ23を受け止めた図1の状態では、隆起部22のそれ以上の進入が規制され、隆起部22と離脱防止部材4とが干渉しないため、管継手の離脱防止機能が良好に確保される。また、隆起部22が、受口1の開口部11から鍔部16の先端までの範囲に亘り、受口1の内周面と挿口2の外周面との間の隙間を埋めることから、受口挿口間の屈曲防止機能も良好に確保される。   After completing the insertion of the insertion slot 2, the coupling tool is removed, and the push bolt 5 is operated to cause the claw portion 41 of the separation preventing member 4 to bite into the outer peripheral surface of the insertion slot 2. As described above, in the state of FIG. 1 in which the flange portion 16 receives the stopper 23, the further entry of the raised portion 22 is restricted, and the raised portion 22 and the separation preventing member 4 do not interfere with each other. Good separation prevention function is ensured. In addition, since the raised portion 22 fills the gap between the inner peripheral surface of the receiving port 1 and the outer peripheral surface of the insertion port 2 over the range from the opening 11 of the receiving port 1 to the tip of the flange portion 16, The anti-bending function between the receiving opening is ensured well.

また、この管継手では、鍔部16がストッパ23を受け止めた状態において、離脱防止部材4を挿口2に係合させることにより、管軸方向での受口1と挿口2との相対移動を規制して、受口挿口間に伸縮防止機能を付与できる。したがって、図1では、挿口2の先端が受口1の奥側端面17に接近しているものの、本発明はこれに限られない。加えて、この管継手では、鍔部16が周方向に沿った帯状をなすことにより、管外の異物が離脱防止部材4に混入し難くなるため、防塵効果を高めて離脱防止機能を良好に保持できる。   Further, in this pipe joint, in a state where the flange portion 16 receives the stopper 23, the detachment preventing member 4 is engaged with the insertion slot 2, whereby the relative movement between the receiving slot 1 and the insertion slot 2 in the pipe axis direction is achieved. And an expansion / contraction preventing function can be provided between the receiving opening. Therefore, in FIG. 1, although the front-end | tip of the insertion port 2 is approaching the back | inner side end surface 17 of the receiving port 1, this invention is not limited to this. In addition, in this pipe joint, since the flange portion 16 forms a belt shape along the circumferential direction, foreign matter outside the pipe is less likely to be mixed into the separation preventing member 4, so that the dust prevention effect is improved and the separation prevention function is improved. Can hold.

本発明では、各部位の位置関係が適切に得られる範囲において、挿口2を仮預けするときの作業性や、挿口2を引き込むときのガイド作用などを考慮して、鍔部16の端面11aからの延出長さLを適宜に設定可能である。本実施形態のようなダクタイル鋳鉄管であれば、延出長さLとして15〜25mmが例示され、呼び径φ100では例えば22mm程度である。鍔部16の厚みは特に限られないが、接続後の外観性を高める観点から、鍔部16の外周面がストッパ23の外周面に揃うものが好ましい。   In the present invention, in the range where the positional relationship between the respective parts is appropriately obtained, the end face of the collar portion 16 is taken into consideration in consideration of workability when temporarily depositing the insertion slot 2 and guide action when the insertion slot 2 is retracted. The extension length L from 11a can be set as appropriate. If it is a ductile cast iron pipe like this embodiment, 15-25 mm is illustrated as extension length L, and it is about 22 mm in nominal diameter (phi) 100. The thickness of the flange portion 16 is not particularly limited, but it is preferable that the outer peripheral surface of the flange portion 16 is aligned with the outer peripheral surface of the stopper 23 from the viewpoint of improving the appearance after connection.

図6は、上述した管継手の変形例を示す側面図である。この管継手は、上記の鍔部16よりも延出長さを長くした帯状の鍔部18を備え、その鍔部18にストッパ23を嵌入するための嵌入孔19を形成している。接続時には、鍔部18がストッパ23を嵌入孔19にて管軸方向から受け止め、隆起部22のそれ以上の進入を規制する。しかも、鍔部18とストッパ23とが周方向にも係止することから、受口1と挿口2との相対回転を防止できる。これにより、異形管を接続した管継手において、受口挿口間の屈曲、伸縮及び回転を規制し、接続状態を良好に安定化できる。   FIG. 6 is a side view showing a modification of the pipe joint described above. This pipe joint is provided with a band-shaped flange 18 having a longer extension than the flange 16 described above, and an insertion hole 19 for inserting a stopper 23 into the flange 18 is formed. At the time of connection, the flange portion 18 receives the stopper 23 from the tube axis direction through the insertion hole 19 and restricts further intrusion of the raised portion 22. Moreover, since the flange 18 and the stopper 23 are also locked in the circumferential direction, relative rotation between the receiving port 1 and the insertion port 2 can be prevented. Thereby, in the pipe joint to which the deformed pipe is connected, the bending, expansion and contraction and rotation between the receiving opening are restricted, and the connection state can be stabilized well.

本発明の管継手は、受口挿口間に屈曲防止機能を付与し得ることから、不平均力が作用し易い異形管の接続において特に有用である。かかる異形管には、上述したような曲管だけでなく、T字管や十字管なども含まれる。   Since the pipe joint of the present invention can provide a bending prevention function between the receiving openings, it is particularly useful in the connection of deformed pipes to which an unaverage force is likely to act. Such deformed pipes include not only the curved pipes as described above but also T-shaped pipes and cross pipes.

本発明は上述した実施形態に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲内で種々の改良変更が可能であり、離脱防止部材の構造並びに隆起部及びストッパの形状などは、適宜に変更することができる。   The present invention is not limited to the embodiment described above, and various improvements and modifications can be made without departing from the spirit of the present invention. The structure of the separation preventing member, the shape of the raised portion and the stopper, etc. It can be changed as appropriate.

本発明に係る管継手は、水道管路の接続部分に適用できるものであるが、これに限られず、水以外の各種の液体・気体などの流体に用いる流体管路に幅広く適用できる。   The pipe joint according to the present invention can be applied to a connection part of a water pipe, but is not limited to this, and can be widely applied to fluid pipes used for fluids such as various liquids / gases other than water.

1 受口
2 挿口
3 シール材
4 離脱防止部材
11 開口部
11a 端面
13 収容溝
16 鍔部
19 嵌入孔
22 隆起部
23 ストッパ
DESCRIPTION OF SYMBOLS 1 Receptacle 2 Insertion 3 Sealing material 4 Detachment prevention member 11 Opening part 11a End surface 13 Housing groove 16 Gutter part 19 Insertion hole 22 Raised part 23 Stopper

Claims (7)

受口の内周と前記受口に挿入された挿口の外周との間を密封するシール材と、
前記シール材と前記受口の開口部の端面との間に配設され、前記挿口の外周面に係合して前記受口からの前記挿口の離脱を防止する離脱防止部材と、
前記挿口の外周に設けられ、前記受口の開口部の内周面と前記挿口の外周面との間の隙間を埋める隆起部と、
前記挿口の外周に、前記隆起部よりも管径方向外側に突き出して設けられたストッパと、
前記受口の開口部から管軸方向に延出し、前記隆起部の挿入を許容しつつ前記ストッパを管軸方向から受け止め、前記離脱防止部材と干渉しないように前記隆起部の進入を規制する鍔部とを備える離脱防止管継手。
A sealing material that seals between the inner periphery of the receiving port and the outer periphery of the insertion port inserted into the receiving port;
A separation preventing member that is disposed between the sealing material and an end surface of the opening of the receiving port, and engages with an outer peripheral surface of the insertion port to prevent the insertion port from being detached from the receiving port,
A raised portion that is provided on the outer periphery of the insertion opening and fills a gap between the inner peripheral surface of the opening of the receiving opening and the outer peripheral surface of the insertion opening;
A stopper provided on the outer periphery of the insertion port so as to protrude outward in the pipe diameter direction from the raised portion,
A rod that extends from the opening of the receiving port in the tube axis direction, receives the stopper from the tube axis direction while allowing the protrusion to be inserted, and restricts the entry of the ridge so as not to interfere with the separation preventing member. And a separation preventing pipe joint.
前記離脱防止部材が、前記受口の開口部を側壁とする収容溝に収容されている請求項1に記載の離脱防止管継手。   The detachment prevention pipe joint according to claim 1, wherein the detachment prevention member is accommodated in an accommodation groove having an opening of the receiving port as a side wall. 前記鍔部が前記ストッパを受け止めたときに、前記受口の開口部から前記鍔部の先端までの範囲に亘って、前記受口の内周面と前記挿口の外周面との間の隙間を前記隆起部が埋める請求項1又は2に記載の離脱防止管継手。   A gap between the inner peripheral surface of the receiving port and the outer peripheral surface of the insertion port over a range from the opening of the receiving port to the tip of the flange when the flange receives the stopper The detachment prevention pipe joint according to claim 1 or 2, wherein the raised portion fills the ridge. 前記鍔部が周方向に沿った帯状に形成されている請求項1〜3のいずれか1項に記載の離脱防止管継手。   The detachment prevention pipe joint according to any one of claims 1 to 3, wherein the flange is formed in a belt shape along a circumferential direction. 前記鍔部が、前記離脱防止部材から離れる方向に向かって内径を漸増させる請求項1〜4のいずれか1項に記載の離脱防止管継手。   The detachment prevention pipe joint according to any one of claims 1 to 4, wherein the flange portion gradually increases an inner diameter in a direction away from the detachment prevention member. 前記鍔部に形成した嵌入孔に前記ストッパを嵌入することにより、前記受口と前記挿口との相対回転を防止可能に構成されている請求項1〜5のいずれか1項に記載の離脱防止管継手。   The detachment according to any one of claims 1 to 5, wherein the stopper is inserted into an insertion hole formed in the flange portion so that relative rotation between the receiving port and the insertion port can be prevented. Prevention pipe joint. シール材を内周側に装着可能な受口を有する管において、前記受口の開口部の内周面を延長させるようにして、前記開口部の端面から管軸方向に延出する鍔部が設けられたことを特徴とする管。   In a tube having a receiving port capable of mounting a sealing material on the inner peripheral side, a flange portion extending in an axial direction from the end surface of the opening is provided so as to extend an inner peripheral surface of the opening of the receiving port. A tube characterized by being provided.
JP2009086494A 2009-03-31 2009-03-31 Detachment prevention fitting Expired - Fee Related JP5307599B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2013167303A (en) * 2012-02-15 2013-08-29 Nifco Inc Connector

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JPH0738870U (en) * 1993-12-17 1995-07-14 株式会社クボタ Detachment prevention fitting
JPH07332556A (en) * 1994-06-10 1995-12-22 Kubota Corp Separation preventing pipe joint
JP2002061783A (en) * 2000-08-16 2002-02-28 Suido Gijutsu Kaihatsu Kiko:Kk Pipe separation preventing device
JP2004138234A (en) * 2002-08-23 2004-05-13 Waterworks Technology Development Organization Co Ltd Pipe jointing method
JP2009058134A (en) * 2008-12-17 2009-03-19 Waterworks Technology Development Organization Co Ltd Pipe joint structure and fluid pipe for pipe joint structure
JP2009063093A (en) * 2007-09-06 2009-03-26 Waterworks Technology Development Organization Co Ltd Pipe joint movement prevention device

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JPH0738870U (en) * 1993-12-17 1995-07-14 株式会社クボタ Detachment prevention fitting
JPH07332556A (en) * 1994-06-10 1995-12-22 Kubota Corp Separation preventing pipe joint
JP2002061783A (en) * 2000-08-16 2002-02-28 Suido Gijutsu Kaihatsu Kiko:Kk Pipe separation preventing device
JP2004138234A (en) * 2002-08-23 2004-05-13 Waterworks Technology Development Organization Co Ltd Pipe jointing method
JP2009063093A (en) * 2007-09-06 2009-03-26 Waterworks Technology Development Organization Co Ltd Pipe joint movement prevention device
JP2009058134A (en) * 2008-12-17 2009-03-19 Waterworks Technology Development Organization Co Ltd Pipe joint structure and fluid pipe for pipe joint structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013167303A (en) * 2012-02-15 2013-08-29 Nifco Inc Connector

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