JP6623261B2

JP6623261B2 - Pipe fitting

Info

Publication number: JP6623261B2
Application number: JP2018149392A
Authority: JP
Inventors: 金田　直樹; 直樹金田
Original assignee: Cosmo Koki Co Ltd
Current assignee: Cosmo Koki Co Ltd
Priority date: 2013-12-25
Filing date: 2018-08-08
Publication date: 2019-12-18
Anticipated expiration: 2034-01-24
Also published as: JP2015143524A; JP2020024045A; JP2018197609A; JP6948372B2; JP6386227B2

Description

本発明は、受口管部に挿口管部を挿入して密封接続する管継手に関する。 The present invention relates to a pipe joint that inserts an insertion tube portion into a receiving tube portion to be hermetically connected.

従来の流体管の受口管部に、流体管の挿口管部を挿入して密封接続する管継手として、受口管部に形成されたフランジと、このフランジの開口部内周に形成されたテーパ面と、挿口管部の外周面とテーパ面との間に介挿されるシール部材と、挿口管部の外周面に形成された係合部と、この係合部に装着される分割押輪と、フランジと分割押輪とを締結する締結部材と、を備え、挿口管部の外周面とテーパ面との間に介挿されるシール部材によって、密封接続する管継手が知られている（例えば、特許文献１参照）。 As a pipe joint that inserts the inlet tube portion of the fluid tube into the receiving tube portion of the conventional fluid tube and seals and connects it, the flange formed in the receiving tube portion and the inner periphery of the opening of this flange are formed A taper surface, a seal member interposed between the outer peripheral surface of the insertion tube portion and the taper surface, an engagement portion formed on the outer periphery surface of the insertion tube portion, and a division attached to the engagement portion There is known a pipe joint that includes a press ring and a fastening member that fastens a flange and a divided press ring, and is hermetically connected by a seal member interposed between an outer peripheral surface of the insertion tube portion and a tapered surface ( For example, see Patent Document 1).

特許第５１９２９７９号公報（第５、６頁、第１図）Japanese Patent No. 592979 (5th and 6th pages, Fig. 1)

しかしながら、特許文献１にあっては、係合部に係合される分割押輪が、２分割構造であるので、分割押輪の剛性は低下してしまう。一方、管継手には、地震、不等沈下等に起因する力又は地上を走る車両からの振動荷重などの外力が作用する。このような外力が、管継手に加わると、受口管部から挿口管部を離脱させる力として作用し、剛性の低い２分割構造の押輪では保持できず、受口管部と挿口管部は離脱してしまうという問題がある。 However, in Patent Document 1, since the divided pusher wheel engaged with the engaging portion has a two-part structure, the rigidity of the divided pusher wheel is lowered. On the other hand, an external force such as a force caused by an earthquake, uneven settlement, or a vibration load from a vehicle running on the ground acts on the pipe joint. When such an external force is applied to the pipe joint, it acts as a force for detaching the insertion tube portion from the receiving tube portion, and cannot be held by a two-piece structure push ring with low rigidity, and the receiving tube portion and the insertion tube. There is a problem that the department will leave.

本発明は、このような問題点に着目してなされたもので、地震、不等沈下等に起因する力又は振動荷重などの外力が加わっても、受口管部と挿口管部との離脱を防止できる管継手を提供することを目的とする。 The present invention has been made paying attention to such problems, and even when an external force such as a force caused by an earthquake, uneven settlement, or a vibration load is applied, the receiving tube portion and the inserting tube portion It aims at providing the pipe joint which can prevent detachment | leave.

前記課題を解決するために、本発明の管継手は、
受口管部に形成されたフランジと、前記受口管部と挿口管部との間に介装されるシール部材と、前記挿口管部の外周面に形成された係合部と、押輪と、前記フランジと前記押輪とを締結する締結部材と、を備えた流体管部の受口管部に流体管部の挿口管部を挿入して密封接続する管継手であって、
前記係合部に係合可能なロッキング部材を有し、前記ロッキング部材は前記押輪に当接するテーパ面と前記シール部材を押圧する押圧面とを備えるとともに、前記シール部材は前記ロッキング部材を押圧する押圧面を備え、前記ロッキング部材の前記押圧面及び前記シール部材の前記押圧面は、前記フランジの端面よりも前記受口管部の外部に突出して配置されており、前記受口管部と前記挿口管部とが離脱する方向に力が作用して前記ロッキング部材と前記押輪とが当接したとき、前記ロッキング部材には縮径される方向に力が付与されることを特徴としている。
この特徴によれば、管継手の受口管部と挿口管部とが離脱する方向に力が働きロッキング部材と押輪が当接したとき、ロッキング部材には縮径される方向に力が働き、ロッキング部材は縮径して、ロッキング部材と係合部とが係合したときの引掛り高さが大きくなり、管継手の受口管部と挿口管部との離脱を防止することができる。 In order to solve the above problems, the pipe joint of the present invention is
A flange formed in the receiving tube portion, a seal member interposed between the receiving tube portion and the insertion tube portion, an engagement portion formed on the outer peripheral surface of the insertion tube portion, A pipe joint that inserts an insertion tube portion of a fluid tube portion into a receiving tube portion of a fluid tube portion that includes a push ring and a fastening member that fastens the flange and the push wheel,
The locking member includes a locking member that can be engaged with the engaging portion, and the locking member includes a tapered surface that abuts on the pusher wheel and a pressing surface that presses the sealing member, and the sealing member presses the locking member. A pressing surface, wherein the pressing surface of the locking member and the pressing surface of the seal member are arranged to protrude outside the receiving tube portion from an end surface of the flange, and the receiving tube portion and the When a force is applied in a direction in which the insertion tube part is detached and the locking member and the push ring are in contact with each other, a force is applied to the locking member in a direction in which the diameter is reduced.
According to this feature, when a force acts in the direction in which the receiving tube portion and the insertion tube portion of the pipe joint are separated from each other, a force acts in the direction in which the diameter of the locking member is reduced when the locking member and the push ring abut. The diameter of the locking member is reduced, and the hooking height when the locking member and the engaging portion are engaged is increased, thereby preventing the receiving pipe portion and the inserting tube portion of the pipe joint from being detached. it can.

本発明の管継手は、
前記ロッキング部材は分割構造を有することを特徴としている。
この特徴によれば、分割構造のロッキング部材は、径方向外側から係合部に係合させることができるので、係合部の高さに合わせて、ロッキング部材と係合部とが係合したときの引掛り高さを必要な大きさに調整することが可能となり、延いては、管継手の受口管部と挿口管部との離脱を防止することができる。 The pipe joint of the present invention is
The locking member has a split structure.
According to this feature, since the locking member having the split structure can be engaged with the engaging portion from the outside in the radial direction, the locking member and the engaging portion are engaged according to the height of the engaging portion. It is possible to adjust the height of the hook to a required size, and thus, it is possible to prevent the receiving pipe portion and the inserting pipe portion of the pipe joint from being detached.

本発明の管継手は、
前記押輪は、環状に一体形成され、その内径寸法は、前記係合部の外径寸法より大きく構成されていることを特徴としている。
この特徴によれば、押輪は環状に一体形成されることで剛性を高くすることができ、高剛性の押輪がロッキング部材に当接すると、ロッキング部材はさらに大きく縮径して、ロッキング部材と係合部との引掛り高さが大きくなり、管継手の受口管部と挿口管部との離脱を防止することができる。 The pipe joint of the present invention is
The push ring is integrally formed in an annular shape, and an inner diameter dimension thereof is larger than an outer diameter dimension of the engaging portion.
According to this feature, the press ring can be integrally formed in an annular shape to increase the rigidity. When the high rigidity press ring comes into contact with the locking member, the locking member is further reduced in diameter and engaged with the locking member. The catching height with the joint portion is increased, and separation between the receiving pipe portion and the insertion tube portion of the pipe joint can be prevented.

本発明の管継手は、
前記ロッキング部材の内径寸法は、前記係合部の外径寸法と略同一に構成されていることを特徴としている。
この特徴によれば、ロッキング部材の内径寸法は、係合部の外径寸法と略同一に構成することで、ロッキング部材は、剛性の高い一体構成とすることができ、剛性の高いロッキング部材が係合部と係合して、管継手の受口管部と挿口管部との離脱を防止することができる。 The pipe joint of the present invention is
The inner diameter dimension of the locking member is substantially the same as the outer diameter dimension of the engaging portion.
According to this feature, the inner diameter dimension of the locking member is configured to be substantially the same as the outer diameter dimension of the engaging portion, so that the locking member can be configured as a highly rigid integrated structure. By engaging with the engaging portion, it is possible to prevent detachment between the receiving tube portion and the insertion tube portion of the pipe joint.

本発明の管継手は、
前記押輪と前記ロッキング部材とは、少なくともテーパ面にて絶縁部材を介して接触していることを特徴としている。
この特徴によれば、押輪とロッキング部材とは、少なくともテーパ面にて絶縁部材を介して接触するので、押輪とロッキング部材との間の絶縁部材に無理な力を加えることなく、ロッキング部材を縮径方向に均等に力を加えることができ、延いては、絶縁性を確保しつつ、管継手の受口管部と挿口管部との離脱を防止することができる。 The pipe joint of the present invention is
The push wheel and the locking member are in contact with each other via an insulating member at least on a tapered surface.
According to this feature, the pusher wheel and the locking member are in contact with each other through the insulating member at least on the tapered surface, so that the locking member is contracted without applying excessive force to the insulating member between the pusher wheel and the locking member. A force can be applied evenly in the radial direction, and as a result, it is possible to prevent detachment between the receiving tube portion and the insertion tube portion of the pipe joint while ensuring insulation.

実施例１における管継手が適用された流体管路を示す概要図である。It is a schematic diagram which shows the fluid pipe line to which the pipe joint in Example 1 was applied. 管継手の側断面図である。It is a sectional side view of a pipe joint. 図２のＡ−Ａ矢視図である。It is an AA arrow line view of FIG. 管継手の分解側断面図である。It is a decomposition side sectional view of a pipe joint. （ａ）は、実施例１における変形例の管継手の側断面図、（ｂ）は、他の変形例の管継手の側断面図である。(A) is a sectional side view of the pipe joint of the modification in Example 1, (b) is a sectional side view of the pipe joint of another modification. さらに他の変形例の管継手の側断面図である。It is a sectional side view of the pipe joint of other modifications. 実施例２における管継手の側断面図である。It is a sectional side view of the pipe joint in Example 2. 実施例２における変形例の管継手の側断面図である。6 is a side cross-sectional view of a pipe joint according to a modified example of Embodiment 2. FIG. 実施例２における他の変形例の管継手の側断面図である。FIG. 10 is a side sectional view of a pipe joint of another modified example in the second embodiment.

本発明に係る管継手を実施するための形態を実施例に基づいて以下に説明する。 EMBODIMENT OF THE INVENTION The form for implementing the pipe joint which concerns on this invention is demonstrated below based on an Example.

実施例１に係る管継手につき、図１から図５を参照して説明する。先ず図１の符号１は、本発明が適用された管継手である。 The pipe joint according to the first embodiment will be described with reference to FIGS. 1 to 5. First, reference numeral 1 in FIG. 1 is a pipe joint to which the present invention is applied.

図１に示されるように、河川などを越えて農業用水等の流体を運ぶために複数の流体管を接続した流体管路１００が用いられる。本実施例の流体管路１００は、河川などを越えるように架設される例えばステンレス鋼あるいは鋼製の管橋部１００ａと、管橋部１００ａに伸縮または可撓管１０１等を介して接続される例えばステンレス鋼あるいは鋼製の接続部１００ｂと、接続部１００ｂに図示しない伸縮または可撓管１０１等を介して接続される地中に埋設されて延びる例えばダクタイル鋳鉄製の埋設部１００ｃと、から主に構成されている。管橋部１００ａと接続部１００ｂとは、伸縮または可撓管１０１により管橋部１００ａと接続部１００ｂとにかかる温度変化等による伸縮等や屈曲や捻じれなどの相対移動を生じさせる外力を吸収するようになっている。埋設部１００ｃにおいて、特に図示しないが、伸縮または可撓管１０１が任意の箇所に設けられている。前記した伸縮または可撓管１０１は、例えばベローズタイプ、ゴム製、金属製などからなる。尚、本実施例では流体管路内の流体は農業用水であるが、流体管の内部を流れる流体は必ずしも農業用水に限らず、例えば工業用水や上水、下水等の他、ガスやガスと液体との気液混合体であっても構わない。更に尚、流体管路は、必ずしも管橋部１００ａ、接続部１００ｂ及び埋設部１００ｃから構成されるものに限らない。 As shown in FIG. 1, a fluid conduit 100 in which a plurality of fluid pipes are connected to carry a fluid such as agricultural water over a river or the like is used. The fluid pipe line 100 of this embodiment is connected to a pipe bridge part 100a made of, for example, stainless steel or steel so as to cross over a river and the like, and is connected to the pipe bridge part 100a via a telescopic or flexible pipe 101 or the like. For example, a connecting portion 100b made of stainless steel or steel and a buried portion 100c made of, for example, ductile cast iron, which is buried in the ground and connected to the connecting portion 100b via a telescopic or flexible tube 101 (not shown), etc. It is configured. The tube bridge portion 100a and the connection portion 100b absorb external force that causes relative movement such as expansion and contraction due to temperature change or the like applied to the tube bridge portion 100a and the connection portion 100b by the expansion and contraction or the flexible tube 101, and bending and twisting. It is supposed to be. In the embedment portion 100c, although not particularly shown, an expansion / contraction or flexible tube 101 is provided at an arbitrary location. The aforementioned expansion / contraction or flexible tube 101 is made of, for example, a bellows type, rubber, or metal. In this embodiment, the fluid in the fluid pipe is agricultural water, but the fluid flowing in the fluid pipe is not necessarily agricultural water. For example, in addition to industrial water, tap water, sewage, etc., gas and gas It may be a gas-liquid mixture with liquid. Furthermore, the fluid conduit is not necessarily limited to the one constituted by the pipe bridge portion 100a, the connection portion 100b, and the embedded portion 100c.

本実施例における管継手１は、管橋部１００ａの橋台となるコンクリート製のアバットメント１２に支持された接続部１００ｂに対して埋設部１００ｃを敷設するにあたって、埋設部１００ｃの端部に配置される受口管部２と、接続部１００ｂから延びる挿口管部３と、を接続する際に用いられる態様について説明する。この管継手１は、図２に示されるように、受口管部２、挿口管部３、押輪５、ロッキング部材６及びシール部材４から主に構成されている。 The pipe joint 1 according to the present embodiment is disposed at the end of the buried portion 100c when the buried portion 100c is laid on the connection portion 100b supported by the concrete abutment 12 serving as the abutment of the pipe bridge portion 100a. The aspect used when connecting the receiving pipe part 2 and the insertion pipe part 3 extended from the connection part 100b is demonstrated. As shown in FIG. 2, the pipe joint 1 mainly includes a receiving pipe part 2, an insertion pipe part 3, a push wheel 5, a locking member 6, and a seal member 4.

次に、受口管部２、挿口管部３、押輪５、ロッキング部材６及びシール部材４について説明する。図２ないし図４に示されるように、受口管部２は、流体管部２ｐ、受口部２ａ及び受口部２ａの開口端部に設けられるフランジ２ｂから主に構成される。また、受口管部２は、フランジ端面２ｃに連なり、漸次縮径するように形成されるテーパ面２ｄ、テーパ面２ｄに連なり受口管部２の管軸Ｂ−Ｂに略平行に形成された円筒面２ｅ、円筒面に連なり受口管部２の管軸Ｂ−Ｂに略垂直に形成された環状端面２ｆ、環状端面２ｆに連なり受口管部２の管軸Ｂ−Ｂに略平行に形成された円筒面２ｇ、円筒面２ｇに連なり受口管部２の管軸Ｂ−Ｂに略垂直に形成された環状端面２ｈ、環状端面２ｈに連なり受口管部２の管軸Ｂ−Ｂに略平行に形成された内周面２ｊを備えている。また、フランジ２ｂには、複数のボルト孔２１、２１、…が設けられている。このボルト孔２１は、ボルト８よりも若干大径に形成されている。さらに、受口管部２は、ダクタイル鋳鉄製であり、塗装やゴムライニングにより防錆あるいは絶縁処理されている。特に、受口管部２の円筒面２ｇ及び環状端面２ｈは絶縁部材２ｋにより絶縁処理されている。絶縁部材２ｋを設けることにより、受口管部２と挿口管部３とが異なる種類の金属により形成される場合の電気的な接触を防ぎ、異種金属同士が水等の流体を介して接触することにより発生するガルバニック腐食を防止することができる。また、外力により挿口管部３が受口管部２の環状端面２ｈ側に移動したときに、絶縁部材２ｋが緩衝部材として機能する。尚、絶縁部材２ｋは、樹脂またはゴム等を成形した絶縁体を圧入、接着するほか、ナイロンコーティング、ゴムライニング、プラスチック塗装、エポキシ樹脂粉体塗装等の絶縁処理により形成することができる。尚、ボルト８、ナット９は、鋼製であるが、ステンレス鋼であることが望ましい。 Next, the receiving pipe part 2, the insertion pipe part 3, the push ring 5, the locking member 6, and the seal member 4 will be described. As shown in FIG. 2 to FIG. 4, the receiving pipe part 2 is mainly composed of a fluid pipe part 2 p, a receiving part 2 a, and a flange 2 b provided at the opening end of the receiving part 2 a. The receiving pipe portion 2 is connected to the flange end surface 2c and is formed to be tapered in parallel with the tapered surface 2d formed so as to be gradually reduced in diameter, and connected to the tapered surface 2d and substantially parallel to the tube axis BB of the receiving pipe portion 2. The cylindrical surface 2e, the annular end surface 2f that is connected to the cylindrical surface and is formed substantially perpendicular to the tube axis BB of the receiving tube portion 2, and the tube end BB that is connected to the annular end surface 2f and substantially parallel to the tube axis BB of the receiving tube portion 2. The cylindrical end surface 2g, the annular end surface 2h connected to the cylindrical surface 2g and substantially perpendicular to the tube axis BB of the receiving tube portion 2, and the tube axis B- of the receiving tube portion 2 connected to the annular end surface 2h. An inner peripheral surface 2j formed substantially parallel to B is provided. Further, the flange 2b is provided with a plurality of bolt holes 21, 21,. The bolt hole 21 has a slightly larger diameter than the bolt 8. Further, the receiving pipe portion 2 is made of ductile cast iron and is rust-proofed or insulated by painting or rubber lining. In particular, the cylindrical surface 2g and the annular end surface 2h of the receiving pipe part 2 are insulated by an insulating member 2k. Providing the insulating member 2k prevents electrical contact when the receiving tube portion 2 and the insertion tube portion 3 are formed of different types of metal, and different metals contact each other through a fluid such as water. By doing so, galvanic corrosion that occurs can be prevented. Moreover, when the insertion tube part 3 moves to the annular end surface 2h side of the receiving tube part 2 by external force, the insulating member 2k functions as a buffer member. The insulating member 2k can be formed by press-fitting and bonding an insulator formed of resin, rubber, or the like, or by an insulating process such as nylon coating, rubber lining, plastic coating, or epoxy resin powder coating. The bolts 8 and nuts 9 are made of steel, but are preferably stainless steel.

次に、挿口管部３について、図２ないし図４を参照して説明する。挿口管部３は、管状部材で、開口端部３ｃを有し、受口管部２の受口部２ａに挿入可能な挿口部３ａと、挿口部３ａの外周部に設けられた本発明の係合部としての凸部３ｂと、凸部３ｂよりも開口端部３ｃの反対側に伸びる流体管部３ｄを備えている。この挿口管部３は、鋼、ステンレス等の金属により形成されている。鋼の場合、表面が防錆あるいは絶縁処理されることは言うまでもない。尚、挿口管部３は、例えば直管状や曲管状の流体管の一端若しくは両端に形成されてもよいし、あるいは管路に接続される流体弁等の接続部材の一端若しくは両端に形成されてもよい。 Next, the insertion tube portion 3 will be described with reference to FIGS. The insertion tube portion 3 is a tubular member, has an open end portion 3c, and is provided on an insertion portion 3a that can be inserted into the reception portion 2a of the reception tube portion 2 and an outer peripheral portion of the insertion portion 3a. A convex portion 3b as an engaging portion of the present invention and a fluid pipe portion 3d extending to the opposite side of the opening end portion 3c from the convex portion 3b are provided. The insertion tube portion 3 is made of a metal such as steel or stainless steel. In the case of steel, it goes without saying that the surface is rust-proofed or insulated. The insertion tube portion 3 may be formed at one end or both ends of a straight or curved fluid pipe, for example, or formed at one end or both ends of a connection member such as a fluid valve connected to the conduit. May be.

押輪５について、図２ないし図４を参照して説明する。押輪５は、一体形成された例えばダクタイル鋳鉄製の環状の部材から構成される。また、押輪５は、内周面５ｆに連なり漸次拡径するテーパ面５ｂ、テーパ面５ｂに連なり管軸Ｂ−Ｂに略平行に形成された内周面５ｃ、内周面５ｃに連なりフランジ端面２ｃに当接する端面５ｄ、端面５ｄの反対側からナット９及び座金１０により押圧される端面５ｅを備えている。押輪５の内周面５ｆの内径寸法は、凸部３ｂの外径寸法より大きく形成され、押輪５は、挿口部３ａ、凸部３ｂ及び流体管部３ｄの外周に遊嵌できるようになっている。また、押輪５の延出部５ａには、複数のボルト孔２２、２２、…が設けられている。このボルト孔２２は、ボルト８よりも若干大径に形成されている。この場合、押輪５は、ナイロンコーティング、ゴムライニング、プラスチック塗装、エポキシ樹脂粉体塗装等の絶縁処理により形成することができる。 The push wheel 5 will be described with reference to FIGS. The presser wheel 5 is formed of an annular member made of, for example, ductile cast iron. The presser wheel 5 includes a tapered surface 5b that is continuous with the inner peripheral surface 5f and that gradually increases in diameter, an inner peripheral surface 5c that is continuous with the tapered surface 5b and is formed substantially parallel to the tube axis BB, and a flange end surface that is continuous with the inner peripheral surface 5c. An end surface 5d abutting on 2c and an end surface 5e pressed by a nut 9 and a washer 10 from the opposite side of the end surface 5d are provided. The inner diameter dimension of the inner peripheral surface 5f of the pusher wheel 5 is formed larger than the outer diameter dimension of the convex part 3b, and the pusher wheel 5 can be loosely fitted to the outer periphery of the insertion part 3a, the convex part 3b and the fluid pipe part 3d. ing. Further, a plurality of bolt holes 22, 22,... Are provided in the extending portion 5 a of the push wheel 5. The bolt hole 22 has a slightly larger diameter than the bolt 8. In this case, the press wheel 5 can be formed by an insulating process such as nylon coating, rubber lining, plastic coating, epoxy resin powder coating, or the like.

次に、ロッキング部材６について図２ないし図４を参照して説明する。ロッキング部材６は、環状の部材であり、例えばステンレス鋼製で、周方向に複数に分割又は一体に構成されている。また、ロッキング部材６は、外周面６ａ、外周面６ａに連なり漸次拡径するテーパ面６ｂ、テーパ面６ｂに連なり管軸Ｂ−Ｂに略平行に形成された外周面６ｃ、外周面６ｃに連なる逃げ面６ｄ、逃げ面６ｄに連なりシール部材を押圧する押圧面６ｅ、押圧面６ｅに連なる溝６ｆ、溝６ｆに連なり凸部３ｂに当接する当り面６ｇ及び当り面６ｇに連なる内周面６ｈを備えている。テーパ面６ｂは、少なくとも押輪５のテーパ面５ｂと後述の絶縁部材６ｊを介して接触している。尚、ロッキング部材６が、周方向に複数に分割して構成される場合には、凸部３ｂとロッキング部材６の当り面６ｇとの引掛り高さが所定の高さとなるように、凸部３ｂの外径寸法と内周面６ｈの内径寸法とを調整することによって、受口管部２と挿口管部３との離脱を防止できる引掛り高さとすることができる。一方、一体構成される場合には、挿口管部３の凸部３ｂを溶接する前に、押輪５及びロッキング部材６をルースフランジのように挿口管部３に予め挿入してから、凸部３ｂを溶接して組立てられる。また、挿入可能な場合には、挿口管部３の開口端部３ｃの反対側から押輪５及びロッキング部材６を凸部３ｂに向け挿入することで組立てもよい。さらに、凸部３ｂの外径寸法と略同一に形成して、剛性の高いロッキング部材６によって、凸部３ｂを保持できるようにしてもよい。 Next, the locking member 6 will be described with reference to FIGS. The locking member 6 is an annular member and is made of, for example, stainless steel, and is divided into a plurality of pieces or integrally formed in the circumferential direction. Further, the locking member 6 is connected to the outer peripheral surface 6a, the tapered surface 6b that is gradually expanded in diameter, and the outer peripheral surface 6c that is connected to the tapered surface 6b and is formed substantially parallel to the tube axis BB. A flank 6d, a pressing surface 6e that continues to the flank 6d and presses the seal member, a groove 6f that continues to the pressing surface 6e, a contact surface 6g that continues to the groove 6f and contacts the convex portion 3b, and an inner peripheral surface 6h that continues to the contact surface 6g I have. The tapered surface 6b is in contact with at least the tapered surface 5b of the push wheel 5 via an insulating member 6j described later. When the locking member 6 is divided into a plurality of portions in the circumferential direction, the convex portion is set so that the hook height between the convex portion 3b and the contact surface 6g of the locking member 6 becomes a predetermined height. By adjusting the outer diameter dimension of 3b and the inner diameter dimension of the inner peripheral surface 6h, it is possible to obtain a hook height that can prevent the receiving pipe part 2 and the insertion pipe part 3 from being detached. On the other hand, in the case of being configured integrally, before welding the convex portion 3b of the inlet tube portion 3, the push ring 5 and the locking member 6 are inserted into the inlet tube portion 3 in advance like a loose flange, and then the convex portion 3b. The part 3b is assembled by welding. Moreover, when it can insert, you may assemble by inserting the press ring 5 and the locking member 6 toward the convex part 3b from the opposite side of the opening end part 3c of the insertion tube part 3. FIG. Further, it may be formed substantially the same as the outer diameter dimension of the convex portion 3b so that the convex portion 3b can be held by the locking member 6 having high rigidity.

図２及び図４に示すように、ロッキング部材６の外周面６ａ、テーパ面６ｂ及び外周面６ｃには、絶縁部材６ｊが設けられ、ロッキング部材６は、少なくとも押輪５のテーパ面５ｂに絶縁部材６ｊを介して接するように、押輪５に嵌合されている。尚、押輪５にロッキング部材６を嵌合する作業を容易にするために、絶縁部材６ｊに凸部６ｍが形成されている。絶縁部材６ｊに凸部６ｍが形成されていると、押輪５の内周面５ｃにロッキング部材６を嵌合する際に、絶縁部材６ｊは押輪５の内周面５ｃとほとんど接触せず、主に凸部６ｍが押輪５の内周面５ｃと接触して嵌合するので、絶縁部材６ｊの損傷を防止できる。逆に、凸部６ｍが形成されていないと、外周面６ｃに形成された絶縁部材６ｊ全体が押輪５の内周面５ｃに接触しながら押込まれるので、絶縁部材６ｊが損傷してしまうことがあり、絶縁の健全性を維持できないことがある。尚、絶縁部材６ｊを設けることにより、受口管部２、挿口管部３、押輪５及びロッキング部材が異なる金属により形成される場合の電気的な接触を防ぎ、異種金属同士が水等の流体を介して接触することにより発生するガルバニック腐食を防止することができる。尚、絶縁部材６ｊは、樹脂またはゴム等を成形した絶縁体を圧入、接着するほか、ナイロンコーティング、ゴムライニング、プラスチック塗装、エポキシ樹脂粉体塗装等の絶縁処理により形成することができる。 As shown in FIGS. 2 and 4, an insulating member 6 j is provided on the outer peripheral surface 6 a, the tapered surface 6 b and the outer peripheral surface 6 c of the locking member 6, and the locking member 6 is an insulating member at least on the tapered surface 5 b of the push ring 5. It is fitted to the pusher wheel 5 so as to be in contact via 6j. In order to facilitate the operation of fitting the locking member 6 to the pusher wheel 5, a convex portion 6m is formed on the insulating member 6j. When the protrusion 6m is formed on the insulating member 6j, the insulating member 6j hardly comes into contact with the inner peripheral surface 5c of the press wheel 5 when the locking member 6 is fitted to the inner peripheral surface 5c of the press wheel 5. Since the convex portion 6m comes into contact with and engages with the inner peripheral surface 5c of the push wheel 5, damage to the insulating member 6j can be prevented. On the contrary, if the convex portion 6m is not formed, the entire insulating member 6j formed on the outer peripheral surface 6c is pushed in contact with the inner peripheral surface 5c of the pusher wheel 5, so that the insulating member 6j is damaged. In some cases, the soundness of insulation cannot be maintained. In addition, by providing the insulating member 6j, electrical contact when the receiving tube portion 2, the insertion tube portion 3, the push ring 5 and the locking member are formed of different metals is prevented, and different metals are made of water or the like. Galvanic corrosion caused by contact through a fluid can be prevented. The insulating member 6j can be formed by press-fitting and bonding an insulator formed of resin or rubber, or by an insulating process such as nylon coating, rubber lining, plastic coating, or epoxy resin powder coating.

次に、シール部材４について説明する。図２及び図４に示されるように、シール部材４は、ゴムなどから形成されており、挿口管部３の挿口部３ａの外径よりも若干小さい内径を有する環状を成している。シール部材４は、ロッキング部材６の押圧面６ｅ、挿口部３ａの外周面、受口部２ａのテーパ面２ｄ、円筒面２ｅ、環状端面２ｆと囲まれる空間内に収納され、受口管部２と挿口管部３との間を密封する。 Next, the seal member 4 will be described. As shown in FIGS. 2 and 4, the seal member 4 is formed of rubber or the like and has an annular shape having an inner diameter slightly smaller than the outer diameter of the insertion portion 3 a of the insertion tube portion 3. . The seal member 4 is accommodated in a space surrounded by the pressing surface 6e of the locking member 6, the outer peripheral surface of the insertion portion 3a, the tapered surface 2d of the receiving portion 2a, the cylindrical surface 2e, and the annular end surface 2f. 2 and the intubation tube portion 3 are sealed.

以上の受口管部２、挿口管部３、押輪５、ロッキング部材６及びシール部材４を備えた管継手１の組立て手順について説明する。図４に示すように、最初に押輪５を挿口管部３に挿入し、流体管部３ｄの外周に遊嵌させる。この際、押輪５の内周面５ｆの内径寸法は、凸部３ｂの外径寸法より大きく形成されているので、押輪５は挿口部３ａ側から流体管部３ｄ側へ移動できる。 The assembly procedure of the pipe joint 1 provided with the above-mentioned receiving pipe part 2, the insertion pipe part 3, the push ring 5, the locking member 6, and the seal member 4 is demonstrated. As shown in FIG. 4, first, the pusher wheel 5 is inserted into the insertion tube portion 3 and is loosely fitted to the outer periphery of the fluid tube portion 3d. At this time, since the inner diameter dimension of the inner peripheral surface 5f of the pusher wheel 5 is formed larger than the outer diameter dimension of the convex part 3b, the pusher wheel 5 can move from the insertion part 3a side to the fluid pipe part 3d side.

次に、ロッキング部材が分割構造の場合には、ロッキング部材６を凸部３ｂよりも挿口管部３の流体管部３ｄ側に配置して、ロッキング部材６を押輪５に嵌合することで、凸部３ｂの高さ寸法に関わらず、径方向外側よりロッキング部材６を挿口管部３の流体管部３ｄ側に配置できる。一方、ロッキング部材が一体構造の場合には、前述したように、予め押輪５とロッキング部材６を凸部３ｂよりも流体管部３ｄ側に配置しておく。 Next, when the locking member has a split structure, the locking member 6 is disposed on the fluid pipe portion 3d side of the insertion tube portion 3 with respect to the convex portion 3b, and the locking member 6 is fitted to the push ring 5 Regardless of the height dimension of the convex portion 3b, the locking member 6 can be disposed on the fluid tube portion 3d side of the inlet tube portion 3 from the radially outer side. On the other hand, when the locking member has an integral structure, as described above, the pusher wheel 5 and the locking member 6 are arranged in advance on the fluid pipe portion 3d side with respect to the convex portion 3b.

次に、ロッキング部材６を押輪５に嵌合して一体化する。ロッキング部材６と押輪５とを一体化することで、分割構成されたロッキング部材６であっても、一体の押輪５によって保持されるので、剛性を高めることができ、管継手１の挿口管部３が受口管部２から離脱する方向の力を保持できる十分な剛性を発揮できるようになる。 Next, the locking member 6 is fitted and integrated with the pusher wheel 5. By integrating the locking member 6 and the push ring 5, even the divided locking member 6 is held by the integral push ring 5, so that the rigidity can be increased and the insertion tube of the pipe joint 1 can be increased. Sufficient rigidity that can maintain the force in the direction in which the portion 3 separates from the receiving tube portion 2 can be exhibited.

続いて、挿口部３ａの外周面にシール部材４を外挿したのち、挿口管部３を受口管部２に挿入する。この際、必要に応じて、滑材を利用するようにしてもよい。 Subsequently, after the sealing member 4 is extrapolated to the outer peripheral surface of the insertion portion 3 a, the insertion tube portion 3 is inserted into the receiving tube portion 2. At this time, a lubricant may be used as necessary.

次に、押輪５の延出部５ａのボルト孔２２及び受口管部２のフランジ２ｂのボルト孔２１にボルト８を通し、座金１０及びナット９により締付けることによって、受口管部２と挿口管部３とを管軸線方向に徐々に引き寄せると、シール部材の押圧面４ａは、ロッキング部材６と押輪５とを一体化した部材の押圧面６ｅによって押圧され、受口管部２のテーパ面２ｄと挿口部３ａの外周面の間に押込まれながら圧縮される。 Next, the bolt 8 is passed through the bolt hole 22 of the extension portion 5a of the pusher wheel 5 and the bolt hole 21 of the flange 2b of the receiving tube portion 2 and is tightened with the washer 10 and the nut 9 so that the receiving tube portion 2 is inserted. When the mouth tube portion 3 is gradually drawn in the tube axis direction, the pressing surface 4a of the seal member is pressed by the pressing surface 6e of the member in which the locking member 6 and the press ring 5 are integrated, and the taper of the receiving tube portion 2 is pressed. It is compressed while being pushed between the surface 2d and the outer peripheral surface of the insertion portion 3a.

最後に、押輪５の端面５ｄと受口管部２のフランジ端面２ｃとが接触するまで締付けを行う。通常、ボルト８、ナット９の締付け管理は、締付けトルクを管理することによって行われる。しかし、実施例１の管継手１は、押輪５の端面５ｄとフランジ端面２ｃとが、接触すれば、締付けトルクが急激に大きくなるので、トルク管理による締め付けを行わなくても、締付けの感触で容易に締付け完了を判断できる。また、押輪５の端面５ｄとフランジ端面２ｃとが、接触していることを、目視で確認することもできる。尚、押輪５の端面５ｄとフランジ端面２ｃとを密着、一体化することで、押輪５の端面５ｄとフランジ端面２ｃとの相対変位を抑えることができるので、ボルトに発生する曲げ応力を小さくできるとともに、挿口管部３の受口管部２からの離脱を強力に防止できる。 Finally, tightening is performed until the end surface 5d of the pusher wheel 5 and the flange end surface 2c of the receiving pipe portion 2 come into contact with each other. Normally, tightening management of the bolts 8 and nuts 9 is performed by managing the tightening torque. However, in the pipe joint 1 of the first embodiment, if the end surface 5d of the pusher wheel 5 and the flange end surface 2c come into contact with each other, the tightening torque increases rapidly. It is easy to judge the completion of tightening. Moreover, it can also confirm visually that the end surface 5d of the press ring 5 and the flange end surface 2c are contacting. The end face 5d of the press ring 5 and the flange end face 2c are closely attached and integrated, so that the relative displacement between the end face 5d of the press ring 5 and the flange end face 2c can be suppressed, so that the bending stress generated in the bolt can be reduced. At the same time, the detachment of the insertion tube portion 3 from the receiving tube portion 2 can be strongly prevented.

以下、実施例１の作用効果について、図１−図４を参照して説明する。地震、不等沈下等に起因する力又は地上を走る車両のからの振動荷重などの外力が、挿口管部３を受口管部２から離脱させる方向に作用すると、挿口管部３の凸部３ｂは、ロッキング部材６の当り面６ｇに接触し、ロッキング部材６のテーパ面６ｂが押輪５のテーパ面５ｂに当接して、外力は、押輪５の延出部５ａと受口管部２のフランジ２ｂとを締結するボルト８、ナット９により保持される。さらに、挿口管部３を受口管部２から離脱させる方向に力が作用すると、ロッキング部材６のテーパ面６ｂが、押輪５のテーパ面５ｂに当接され、ロッキング部材６は、テーパ面５ｂより縮径される方向に力を受け、ロッキング部材６の内周面６ｈは縮径して、ロッキング部材６と凸部３ｂとの引掛り高さが大きくなり、管継手１の受口管部２と挿口管部３との離脱を強力に防止できる。 Hereinafter, the effect of Example 1 is demonstrated with reference to FIGS. 1-4. When an external force such as a force caused by an earthquake, unequal subsidence, or a vibration load from a vehicle running on the ground acts in a direction in which the inlet tube portion 3 is separated from the inlet tube portion 2, the insertion tube portion 3 The convex portion 3b is in contact with the contact surface 6g of the locking member 6, the tapered surface 6b of the locking member 6 is in contact with the tapered surface 5b of the pusher wheel 5, and the external force is generated by the extension part 5a of the pusher wheel 5 and the receiving pipe part. 2 and 2 are held by a bolt 8 and a nut 9 that fasten the flange 2b. Further, when a force acts in a direction in which the insertion tube portion 3 is detached from the receiving tube portion 2, the tapered surface 6b of the locking member 6 is brought into contact with the tapered surface 5b of the push wheel 5, and the locking member 6 is The inner peripheral surface 6h of the locking member 6 receives a force in the direction in which the diameter is reduced from 5b, and the hooking height between the locking member 6 and the convex portion 3b is increased. Separation of the part 2 and the insertion tube part 3 can be strongly prevented.

尚、ロッキング部材６が、周方向に分割される構成の場合には、径方向外側から凸部３ｂに係合させることができるので、凸部３ｂとロッキング部材６の当り面６ｇとの引掛り高さが所定の高さとなるように、凸部３ｂの外径寸法と内周面６ｈの内径寸法とを調整することができ、延いては受口管部２と挿口管部３との離脱を防止することができる。さらに、ロッキング部材６のテーパ面６ｂが、押輪５のテーパ面５ｂに当接して、ロッキング部材６はテーパ面５ｂより縮径される方向に力が働くと、分割構成のロッキング部材６の内周面６ｈは、一体構成のロッキング部材６に比較して大きく縮径するので、ロッキング部材６と凸部３ｂとの引掛り高さがさらに大きくなるので、管継手１の受口管部２と挿口管部３との離脱をさらに強力に防止できる。 In the case where the locking member 6 is divided in the circumferential direction, the locking member 6 can be engaged with the convex portion 3b from the outer side in the radial direction, and therefore the hook between the convex portion 3b and the contact surface 6g of the locking member 6 is engaged. The outer diameter dimension of the convex portion 3b and the inner diameter dimension of the inner peripheral surface 6h can be adjusted so that the height becomes a predetermined height. Separation can be prevented. Furthermore, when the taper surface 6b of the locking member 6 abuts against the taper surface 5b of the push ring 5 and a force acts in a direction in which the diameter of the locking member 6 is reduced from the taper surface 5b, the inner periphery of the locking member 6 having a divided configuration is obtained. Since the surface 6h is greatly reduced in diameter compared with the locking member 6 having an integral structure, the hooking height between the locking member 6 and the convex portion 3b is further increased. Separation from the mouth tube portion 3 can be prevented more strongly.

一方、ロッキング部材を一体構成とすると剛性が高いので、ロッキング部材６のテーパ面６ｂが押輪５のテーパ面５ｂに当接すると、ロッキング部材６の内周面６ｈの押圧面６ｅ側が縮径して、管継手１の受口管部２と挿口管部３との離脱をさらに防止する力が働く。 On the other hand, when the locking member is integrated, the rigidity is high. Therefore, when the tapered surface 6b of the locking member 6 abuts on the tapered surface 5b of the push ring 5, the pressing surface 6e side of the inner peripheral surface 6h of the locking member 6 is reduced in diameter. The force which further prevents separation of the receiving pipe part 2 and the insertion pipe part 3 of the pipe joint 1 works.

さらに、押輪５は、環状一体に形成されるので剛性が高く、分割構成のロッキング部材６を剛性の高い押輪５に嵌合して一体化することによって、ロッキング部材６の剛性を高めることができ、管継手１の受口管部２と挿口管部３との離脱防止機能を向上できる。また、押輪５及びロッキング部材６がともに一体に構成される場合にはさらに剛性が高くなり、管継手１の受口管部２と挿口管部３との離脱を防止する機能をさらに高めることができる。 Further, since the press ring 5 is formed integrally with an annular shape, the rigidity is high, and the rigidity of the locking member 6 can be increased by fitting and integrating the locking member 6 having a divided structure with the high rigidity press ring 5. Moreover, the separation preventing function between the receiving pipe part 2 and the insertion pipe part 3 of the pipe joint 1 can be improved. Further, when both the push wheel 5 and the locking member 6 are integrally formed, the rigidity is further increased, and the function of preventing the outlet pipe portion 2 and the insertion pipe portion 3 of the pipe joint 1 from being separated is further enhanced. Can do.

また、押輪５とロッキング部材６とは、少なくともテーパ面５ｂ、６ｂにて絶縁部材を介して接触するので、押輪５とロッキング部材６との間の絶縁部材に無理な力を加えることなく、ロッキング部材６に対し縮径方向に均等に力を加えることができ、延いては、絶縁性を確保しつつ、管継手１の受口管部２と挿口管部３との離脱を防止することができる。 Further, since the push wheel 5 and the locking member 6 are in contact with each other through the insulating member at least at the tapered surfaces 5b and 6b, the locking member 5 can be locked without applying an excessive force to the insulating member between the push wheel 5 and the locking member 6. A force can be applied evenly to the member 6 in the direction of the diameter reduction, and as a result, the separation of the receiving tube portion 2 and the insertion tube portion 3 of the pipe joint 1 is prevented while ensuring insulation. Can do.

以上、本発明の実施例を図面により説明してきたが、具体的な構成はこれら実施例に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。 Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

例えば、前記実施例においては、図２及び図４に示すように、受口管部２は、ダクタイル鋳鉄製であり、挿口管部３は、鋼又はステンレス等の異種金属で構成されるため、電蝕防止のため、押輪５とロッキング部材６との間には絶縁部材６ｊを設けている。しかし、ロッキング部材６がシール部材４を押圧する押圧面６ｅには、絶縁部材を設けていないので、押圧面６ｅが受口管部２のフランジ端面２ｃに接触しないように、ロッキング部材６には、逃げ面６ｄが設けられている。 For example, in the said Example, as shown in FIG.2 and FIG.4, since the receiving pipe part 2 is a product made from ductile cast iron, and the insertion pipe part 3 is comprised with dissimilar metals, such as steel or stainless steel. In order to prevent electrolytic corrosion, an insulating member 6j is provided between the push wheel 5 and the locking member 6. However, since the insulating member is not provided on the pressing surface 6e on which the locking member 6 presses the seal member 4, the locking member 6 has no contact with the flange end surface 2c of the receiving pipe portion 2. A flank 6d is provided.

これに対し、図５（ａ）に示すように、ロッキング部材６に逃げ面を設ける代わりに、シール部材４をフランジ端面２ｃより突出するようにして、ロッキング部材６の押圧面６ｎと受口管部２のフランジ端面２ｃとの接触を防止して、電蝕を確実に防止することもできる。 On the other hand, as shown in FIG. 5 (a), instead of providing the flank on the locking member 6, the sealing member 4 protrudes from the flange end surface 2c so that the pressing surface 6n of the locking member 6 and the receiving tube Contact with the flange end surface 2c of the portion 2 can be prevented, and the electric corrosion can be surely prevented.

また、図５（ｂ）に示すように、絶縁部材６ｊをロッキング部材６が押輪５と接触する面だけでなく、ロッキング部材６が受口管部２のフランジ端面２ｃ及びシール部材４と接触する押圧面６ｐにも設けることによって、さらに確実に電蝕を防止することもできる。 Further, as shown in FIG. 5 (b), not only the surface where the locking member 6 contacts the push ring 5 but also the locking member 6 contacts the flange end surface 2 c of the receiving pipe portion 2 and the seal member 4. By providing it also on the pressing surface 6p, it is possible to prevent electric corrosion more reliably.

尚、図５（ａ）においては、ロッキング部材６は、挿口管部３が受口管部２から離脱する方向の動きを防止するように凸部３ｂを保持しているが、図５（ｂ）に示すように、ロッキング部材６の内周に環状の溝を設け、受口管部２と挿口管部３とが離脱する方向だけでなく、押込まれる方向の動きを防止するように凸部３ｂを保持させることもできる。 In FIG. 5A, the locking member 6 holds the convex portion 3b so as to prevent the insertion tube portion 3 from moving in the direction away from the receiving tube portion 2. As shown in b), an annular groove is provided on the inner periphery of the locking member 6 so as to prevent movement in the pushing direction as well as the direction in which the receiving tube portion 2 and the insertion tube portion 3 are separated. It is also possible to hold the convex portion 3b.

図６は、さらに別の変形例を示すものである。これまでの実施例は、締結部材のボルト８として、Ｔ頭ボルトを使用していたが、これに代えて、絶縁ボルト８’を使用したものである。ここで、絶縁ボルト８’の頭部８’ａを締付けるための工具を使用するためのスペースを確保するため、フランジ２’ｂ、押輪５’の外径を大きくしている。 FIG. 6 shows another modification. In the embodiments so far, a T-head bolt is used as the bolt 8 of the fastening member, but an insulating bolt 8 'is used instead. Here, in order to secure a space for using a tool for tightening the head 8'a of the insulating bolt 8 ', the outer diameters of the flange 2'b and the pusher wheel 5' are increased.

前述のように、図６の実施例においても、受口管部２’及び押輪５’の材質は、ダクタイル鋳鉄であり、一方、挿口３、絶縁ボルト８’の材質は、ステンレス鋼であり、さらに、ロッキング部材６の材質は、ステンレス鋼またはステンレス鋳鋼であるので、異種金属同士の直接接触あるいは水等の流体を介して電気的に接続して発生するガルバニック腐食を防止するため、絶縁処理する必要がある。 As described above, also in the embodiment of FIG. 6, the material of the receiving pipe portion 2 ′ and the push ring 5 ′ is ductile cast iron, while the material of the insertion port 3 and the insulating bolt 8 ′ is stainless steel. Furthermore, since the material of the locking member 6 is stainless steel or cast stainless steel, an insulation treatment is performed to prevent galvanic corrosion caused by direct contact between different metals or by electrical connection through a fluid such as water. There is a need to.

そこで、ガルバニック腐食を防止するため、絶縁ボルト８’のボルト軸部８’ｂの外周面は、絶縁部材８’ｃにより絶縁被覆され、押輪５’の外周面、内周面、端面、ボルト孔２２’は、絶縁部材５’ｇにより絶縁被覆され、ロッキング部材６の挿口３に面する側を除く面は絶縁部材６ｊにより絶縁被覆される。さらに、ボルト頭部８’ａとフランジ２’ｂとの間及び押輪５’とナット９との間は、座金１０ｂの両側に絶縁ワッシャー１０ａを配置して絶縁している。ここで、絶縁部材８’ｃは、スリーブ状で、ＰＴＦＥ、ＦＥＴ等のフッ素樹脂、ポリ塩化ビニル、エポキシ、ナイロン、合成ゴム等の材料からなり、絶縁部材５’ｇ及び絶縁部材６ｊは、樹脂等を成形した絶縁体を圧入、接着するほか、ナイロンコーティング、ゴムライニング、プラスチック塗装、エポキシ樹脂粉体塗装等の絶縁処理を施してもよく、また、絶縁ワッシャー１０ａは、ガラスクロス入りエポキシ、ガラスクロス入り樹脂等の絶縁材料により形成することができる。尚、図６においては、座金１０ｂの両側に絶縁ワッシャー１０ａを配置しているが、絶縁ワッシャー１０ａの両側に座金１０ｂを配置して絶縁してもよく、座金１０ｂは、鋼、ステンレス鋼等の金属あるいは塩ビ、ＰＰ、ＰＣ等の樹脂から成るものでもよい。 Therefore, in order to prevent galvanic corrosion, the outer peripheral surface of the bolt shaft portion 8′b of the insulating bolt 8 ′ is covered with an insulating member 8′c, and the outer peripheral surface, inner peripheral surface, end surface, bolt hole of the press ring 5 ′. 22 'is insulated with an insulating member 5'g, and the surface of the locking member 6 except for the side facing the insertion slot 3 is insulated with an insulating member 6j. Further, an insulating washer 10a is disposed on both sides of the washer 10b to insulate between the bolt head 8'a and the flange 2'b and between the press ring 5 'and the nut 9. Here, the insulating member 8′c has a sleeve shape and is made of a material such as PTFE, FET or other fluororesin, polyvinyl chloride, epoxy, nylon, synthetic rubber, etc., and the insulating member 5′g and the insulating member 6j are made of resin. Insulation processing such as nylon coating, rubber lining, plastic coating, epoxy resin powder coating, etc. may be applied, and the insulating washer 10a is made of glass cloth epoxy, glass It can be formed of an insulating material such as a resin containing cloth. In FIG. 6, the insulating washers 10a are arranged on both sides of the washer 10b. However, the washers 10b may be arranged on both sides of the insulating washer 10a for insulation, and the washer 10b is made of steel, stainless steel, or the like. It may be made of metal or resin such as vinyl chloride, PP, PC.

また、図６の実施例においては、図５（ｂ）と同じように、受口管部２’と挿口管部３とが離脱する方向だけでなく、所定の位置以上に押込まれる方向の動きを防止するように凸部３ｂをロッキング部材６によって保持されるので、外力が作用しても、挿口管部３の開口端部３ｃが、受口管部２’の環状端面２’ｈに接触することを防止できる。したがって、受口管部２’は円筒面２’ｇのみを絶縁部材２’ｋにより絶縁処理されている。尚、受口管部２’の円筒面２’ｇ及び環状端面２’ｈの両方が、絶縁部材２’ｋにより絶縁されてもよいことは言うまでもない。 In the embodiment of FIG. 6, as in FIG. 5B, not only the direction in which the receiving tube portion 2 ′ and the insertion tube portion 3 are separated, but also the direction in which the receiving tube portion 2 ′ is pushed beyond a predetermined position. Since the convex portion 3b is held by the locking member 6 so as to prevent the movement of the insertion tube portion 3, even if an external force is applied, the opening end portion 3c of the insertion tube portion 3 becomes the annular end surface 2 ′ of the reception tube portion 2 ′. It is possible to prevent contact with h. Therefore, only the cylindrical surface 2'g of the receiving pipe portion 2 'is insulated by the insulating member 2'k. Needless to say, both the cylindrical surface 2'g and the annular end surface 2'h of the receiving pipe portion 2 'may be insulated by the insulating member 2'k.

尚、図６において、押輪５’とフランジ２’ｂとの間には、樹脂製のスペーサ２３を設け、押輪５’とフランジ２’ｂとの擦れによる絶縁部材５’ｇの傷つき、はがれ等を防止している。ただし、傷つきの恐れがないようなときには、金属製のスペーサ２３を使用してもよいし、スペーサ２３を省いてもよい。 In FIG. 6, a resin spacer 23 is provided between the pusher wheel 5 ′ and the flange 2′b, and the insulating member 5′g is damaged or peeled off due to friction between the pusher wheel 5 ′ and the flange 2′b. Is preventing. However, when there is no fear of scratching, the metal spacer 23 may be used, or the spacer 23 may be omitted.

また、受口管部２，２’、挿口管部３、押輪５，５’及びロッキング部材６は、異なる種類の金属によりそれぞれ形成されていたが、前記した全ての部材あるいは任意の複数の部材が同一種類の金属で構成されてもよく、同一種類の金属で構成された場合、必ずしも絶縁処理されなくてもよい。尚、前記した全ての部材あるいは任意の部材は、必ずしも金属製に限らず、樹脂からなるものでもよい。 In addition, the receiving tube portions 2 and 2 ′, the insertion tube portion 3, the push wheels 5 and 5 ′, and the locking member 6 are each formed of different types of metals. The members may be made of the same type of metal, and when the members are made of the same type of metal, the insulation treatment is not necessarily required. In addition, all the above-mentioned members or arbitrary members are not necessarily made of metal, and may be made of resin.

実施例２に係る管継手につき、図７から図９を参照して説明する。実施例１に係る管継手においては、本発明の係合部としての凸部３ｂにロッキング部材６の溝６ｆが係合しているのに対し、実施例２に係る管継手においては、本発明の係合部としての凹部３’ｂにロッキング部材６’の凸部６’ｆが係合している点で相違している。しかし、その他の構成は実施例１の管継手と同じであり、重複する説明は省略する。 The pipe joint according to the second embodiment will be described with reference to FIGS. In the pipe joint according to the first embodiment, the groove 6f of the locking member 6 is engaged with the convex portion 3b as the engaging portion of the present invention, whereas in the pipe joint according to the second embodiment, the present invention is provided. This is different in that the convex portion 6′f of the locking member 6 ′ is engaged with the concave portion 3′b as the engaging portion. However, other configurations are the same as those of the pipe joint of the first embodiment, and redundant description is omitted.

図７に示すように、実施例２に係る管継手も、流体管部の受口管部２’に流体管部の挿口管部３’を挿入して密封接続する管継手１’であり、受口管部２’に形成されたフランジ２’ｂと、受口管部２’と挿口管部３’との間に介装されるシール部材４と、挿口管部３’の外周面に形成された本発明の係合部としての凹部３’ｂと、押輪５’と、フランジ２’ｂと押輪５’とをスペーサ２３を介して締結する締結部材としての絶縁ボルト８’と、凹部３’ｂに係合可能なロッキング部材６’の凸部６’ｆを備えている。実施例１と同じく、受口管部２’と挿口管部３’とが離脱する方向に力が作用してロッキング部材６’と押輪５’とが当接したとき、ロッキング部材６’は、押輪５’より縮径される方向に力を受け、ロッキング部材６’は縮径して、ロッキング部材６’の凸部６’ｆと挿口管部３’の凹部３’ｂとの引掛り高さが大きくなり、管継手１’の受口管部２’と挿口管部３’との離脱を強力に防止できる。さらに、受口管部２’と挿口管部３’とが、所定の位置以上に押込まれる方向の動きを防止されるように、凹部３’ｂはロッキング部材６’の凸部６’ｆによって保持される。 As shown in FIG. 7, the pipe joint according to the second embodiment is also a pipe joint 1 ′ in which the inlet pipe part 3 ′ of the fluid pipe part is inserted into the inlet pipe part 2 ′ of the fluid pipe part and hermetically connected. The flange 2'b formed in the receiving tube portion 2 ', the seal member 4 interposed between the receiving tube portion 2' and the insertion tube portion 3 ', and the insertion tube portion 3' Insulating bolt 8 ′ as a fastening member for fastening the recess 3 ′ b as the engaging portion of the present invention formed on the outer peripheral surface, the press ring 5 ′, the flange 2 ′ b and the press ring 5 ′ via the spacer 23. And a convex portion 6′f of a locking member 6 ′ that can be engaged with the concave portion 3′b. As in the first embodiment, when a force is applied in the direction in which the receiving tube portion 2 ′ and the insertion tube portion 3 ′ are separated from each other and the locking member 6 ′ and the push ring 5 ′ come into contact with each other, the locking member 6 ′ is The locking member 6 ′ receives a force in the direction in which the diameter of the push ring 5 ′ is reduced, and the locking member 6 ′ is reduced in diameter so that the protrusion 6 ′ f of the locking member 6 ′ and the recess 3 ′ b of the insertion tube portion 3 ′ are hooked. The height of the pipe joint 1 'is increased, and the disconnection between the receiving pipe part 2' and the insertion pipe part 3 'of the pipe joint 1' can be strongly prevented. Further, the recess 3′b is formed in the convex portion 6 ′ of the locking member 6 ′ so that the receiving tube portion 2 ′ and the insertion tube portion 3 ′ are prevented from moving in a direction in which the receiving tube portion 2 ′ is pushed beyond a predetermined position. held by f.

図７においても、受口管部２’及び押輪５’の材質は、ダクタイル鋳鉄であり、一方、挿口管部３’、絶縁ボルト８’のボルト頭部８ａ及びボルト軸部８ｂの材質は、ステンレス鋼であり、さらに、ロッキング部材６’の材質は、ステンレス鋼またはステンレス鋳鋼であるので、異種金属同士の直接接触あるいは水等の流体を介して電気的に接続して発生するガルバニック腐食を防止するため、同様に絶縁処理されている。 Also in FIG. 7, the material of the receiving tube portion 2 ′ and the push ring 5 ′ is ductile cast iron, while the material of the insertion tube portion 3 ′, the bolt head portion 8a of the insulating bolt 8 ′, and the bolt shaft portion 8b. Furthermore, since the material of the locking member 6 ′ is stainless steel or cast stainless steel, the galvanic corrosion caused by direct contact between different metals or electrical connection through a fluid such as water is prevented. In order to prevent this, insulation is similarly applied.

また、実施例２における変形例として、図８に示すように、受口管部２’の他端は、管継手の挿口管部２５として形成されたものでもよい。挿口管部２５は、一般に、受口にゴム輪、ロックリング、ロックリングホルダ等を組み込んだ耐震管継手及び管路に対応できるように、挿口管部２５の端部付近に、離脱防止用の突起を設けることもできる。 As a modification of the second embodiment, as shown in FIG. 8, the other end of the receiving pipe portion 2 ′ may be formed as an insertion pipe portion 25 of a pipe joint. The insertion tube portion 25 is generally prevented from coming off near the end of the insertion tube portion 25 so as to be compatible with a seismic pipe joint and a pipe line in which a rubber ring, a lock ring, a lock ring holder and the like are incorporated in the receiving port. Protrusions can also be provided.

さらに、実施例２における他の変形例として、図９に示すように、受口管部２’の他端は、可撓管側ケース３１として形成し、伸縮可撓管継手３０として構成することもできる。受口管部２’の他端に形成された可撓管側ケース３１と座３２とは、可撓管側ケース３１の端部に形成されたバヨネット爪３１ａと、座３２に形成されたバヨネット爪３２ａによりバヨネット係合されている。また、球面部材３４が、可撓管側ケース３１と挿口管部４１との間に配置され、シール部材３５により可撓管側ケース３１と球面部材３４との間が密封され、シール部材３６により球面部材３４と挿口管部４１との間が密封されている。また、挿口管部４１の外周には溝４１ａが設けられ、該溝４１ａには、可撓管側ケース３１と挿口管部４１との一定の伸縮を許容しつつ離脱を防止するため、ロッキング部材４２が設けられている。さらに、伸縮可撓管継手３０内に夾雑物等が侵入しないようにダストカバー３３及びダストリング３７が設けられている。 Furthermore, as another modified example of the second embodiment, as shown in FIG. 9, the other end of the receiving pipe portion 2 ′ is formed as a flexible pipe side case 31 and configured as an expansion / contraction flexible pipe joint 30. You can also. The flexible tube side case 31 and the seat 32 formed at the other end of the receiving tube portion 2 ′ are a bayonet claw 31 a formed at the end of the flexible tube side case 31 and a bayonet formed at the seat 32. The bayonet is engaged by the claw 32a. The spherical member 34 is disposed between the flexible tube side case 31 and the insertion tube portion 41, and the space between the flexible tube side case 31 and the spherical member 34 is sealed by the seal member 35. Thus, the space between the spherical member 34 and the insertion tube portion 41 is sealed. In addition, a groove 41a is provided on the outer periphery of the insertion tube portion 41, and in the groove 41a, in order to prevent detachment while allowing a certain expansion and contraction of the flexible tube side case 31 and the insertion tube portion 41, A locking member 42 is provided. Further, a dust cover 33 and a dust ring 37 are provided so that foreign matter and the like do not enter the telescopic flexible pipe joint 30.

このような伸縮可撓管継手３０を設けることで、可撓管側ケース３１と挿口管部４１とは、密封性を保持しつつ、可撓管側ケース３１の内部で挿口管部４１は、軸方向に移動することができるとともに回転することができ、伸縮性と可撓性とを備えた管継手とすることができる。 By providing such an expansion / contraction flexible pipe joint 30, the flexible tube side case 31 and the insertion tube portion 41 maintain the sealing property, and the insertion tube portion 41 is provided inside the flexible tube side case 31. Is capable of moving in the axial direction and rotating, and can be a pipe joint having stretchability and flexibility.

尚、実施例２のロッキング部材がシール部材を押圧する態様として、図６に示すように、ロッキング部材６とシール部材４とが接触する面を、フランジ２’ｂの端面２’ｃから受口管部２’の外部に突出させてもよいし、図７に示すように、ロッキング部材６’とシール部材４とが接触する面を、フランジ２’ｂの端面２’ｃから受口管部２’の内部に侵入させ、ロッキング部材６’の角部が受口管部２’のテーパ面２’ｄと接触するようにしてもよい。さらに、ロッキング部材６’の端面をフランジ２’ｂの端面２’ｃに接触させるようにすることもできる（図５（ｂ）参照）。また、ロッキング部材６の押圧面６ｎとフランジの端面２ｃとの間に、圧縮され変形したシール部材４の逃げ代となる空隙を形成してもよく（図５（ａ）参照）、ロッキング部材６の押圧面をフランジの端面２ｃに接触させるようにして、前記した空隙を形成する切り欠き部を設けてもよい（図５（ｂ）参照）。また、ロッキング部材６の押圧面、スペーサ２３の内周面、及び押輪５’の端面の内周部とで形成される空隙を、圧縮され変形したシール部材４の逃げ代となる空隙として利用してもよい（図６参照）。 As a mode in which the locking member of Example 2 presses the seal member, as shown in FIG. 6, the surface where the locking member 6 and the seal member 4 are in contact with each other is received from the end surface 2′c of the flange 2′b. As shown in FIG. 7, the surface where the locking member 6 ′ and the seal member 4 come into contact with each other from the end surface 2 ′ c of the flange 2 ′ b as shown in FIG. 7. 2 'may be inserted so that the corner of the locking member 6' contacts the tapered surface 2'd of the receiving tube 2 '. Furthermore, the end surface of the locking member 6 'can be brought into contact with the end surface 2'c of the flange 2'b (see FIG. 5B). Further, a gap may be formed between the pressing surface 6n of the locking member 6 and the end surface 2c of the flange to allow clearance of the compressed and deformed seal member 4 (see FIG. 5A). The pressing surface may be in contact with the end surface 2c of the flange, and a notch for forming the above-described gap may be provided (see FIG. 5B). Further, the gap formed by the pressing surface of the locking member 6, the inner peripheral surface of the spacer 23, and the inner peripheral portion of the end surface of the press ring 5 ′ is used as a clearance that allows clearance of the compressed and deformed seal member 4. (See FIG. 6).

また、実施例１及び２の管継手は、直管の管継手に適用する例を示したが、これに限らず、短管、異径管、弁の管接続部等を密封接続する管継手としても使用することができる。また、ロッキング部材は、一体又は分割にて構成したが、これに限らず、例えば周方向に一部切欠かれた略Ｃ字状に形成されてもよい。尚、押輪は、必ずしも一体環状の構造に限られず、２以上の所定数の分割構造であっても構わない。またロッキング部材は、必ずしも２分割構造に限られず、３以上の所定数の分割構造であっても構わない。 Moreover, although the pipe joint of Example 1 and 2 showed the example applied to a straight pipe joint, it is not restricted to this, The pipe joint which seal-connects a short pipe, a different diameter pipe, the pipe connection part of a valve, etc. Can also be used. Moreover, although the locking member was comprised by integral or division | segmentation, it is not restricted to this, For example, you may form in the substantially C shape partially notched in the circumferential direction. The push wheel is not necessarily limited to an integral annular structure, and may be a predetermined number of two or more divided structures. Further, the locking member is not necessarily limited to the two-divided structure, and may have a predetermined number of three or more divided structures.

１、１’ 管継手
２、２’ 受口管部
２ａ受口部
２ｂ、２’ｂフランジ
２ｋ、２’ｋ絶縁部材
３、３’ 挿口管部
３ａ、３’ａ挿口部
３ｂ凸部（係合部）
３’ｂ凹部（係合部）
３ｄ流体管部
４シール部材
５、５’ 押輪
５ｂテーパ面
６、６’ ロッキング部材
６ｂテーパ面
６ｊ、６’ｊ絶縁部材
６ｍ凸部
８ボルト（締結部材）
８’ 絶縁ボルト（締結部材）
９ナット（締結部材） 1, 1 'pipe joint 2, 2' receiving pipe part 2a receiving part 2b, 2'b flange 2k, 2'k insulating member 3, 3 'inlet pipe part 3a, 3'a inlet part 3b convex part (Engagement part)
3'b recess (engagement part)
3d Fluid pipe part 4 Seal member 5, 5 'Push ring 5b Tapered surface 6, 6' Locking member 6b Tapered surface 6j, 6'j Insulating member 6m Convex part 8 Bolt (fastening member)
8 'Insulation bolt (fastening member)
9 Nut (fastening member)

Claims

A flange formed in the receiving tube portion, a seal member interposed between the receiving tube portion and the insertion tube portion, an engagement portion formed on the outer peripheral surface of the insertion tube portion, A pipe joint that inserts an insertion tube portion of a fluid tube portion into a receiving tube portion of a fluid tube portion that includes an integrally formed push ring, and a fastening member that fastens the flange and the push ring, and is hermetically connected. There,
Has engageable b Kkingu member in the engaging portion, with the locking member comprises a pressing surface for pressing the sealing member, the sealing member comprises a pressing surface for pressing the locking member, before Symbol junk ring An insulating member is provided between the locking member and the end surface of the press ring, and the pressing surface of the locking member and the pressing surface of the sealing member are the end surfaces of the flange. A pipe joint, wherein the pipe joint is disposed so as to protrude to the outside of the receiving pipe part .

2. The pipe joint according to claim 1 , wherein a gap serving as a clearance for the seal member is formed between the pressing surface of the locking member and an end surface of the flange .

The pipe joint according to claim 1 or 2 , wherein the engaging portion is a concave portion, and the locking member has a convex portion engageable with the concave portion .

4. The locking member according to claim 1, wherein the locking member is divided into a plurality of pieces in the circumferential direction or integrally formed, or is formed in a substantially C shape that is partially cut away in the circumferential direction. Pipe fittings.