JP2020024045A

JP2020024045A - Pipe joint

Info

Publication number: JP2020024045A
Application number: JP2019211010A
Authority: JP
Inventors: 金田　直樹; Naoki Kaneda; 直樹金田
Original assignee: Cosmo Koki Co Ltd
Current assignee: Cosmo Koki Co Ltd
Priority date: 2013-12-25
Filing date: 2019-11-22
Publication date: 2020-02-13
Anticipated expiration: 2034-01-24
Also published as: JP6386227B2; JP6948372B2; JP2015143524A; JP6623261B2; JP2018197609A

Abstract

To provide a pipe joint which can prevent separation between a socket part and a spigot part even if external force, such as force caused by earthquake and differential settlement, etc., or a vibration load, is applied thereto.SOLUTION: A pipe joint 1 includes: a flange 2b formed at a socket part 2; a seal member 4 disposed between the socket part 2 and a spigot part 3; an engagement part 3b formed on an outer peripheral surface of the spigot part 3; an integrally formed push ring 5; and a fastening member 8 which fastens the flange 2b to the push ring 5 and makes seal connection by inserting the socket part 2 of a fluid pipe part into the spigot part 3 of a fluid pipe part. The pipe joint 1 has a locking member 6 which can engage with the engagement part 3b. The locking member 6 includes an end part which contacts with the socket part 2 side through an insulation member to prevent an opening end part 3c of the spigot part 3 from contacting with an annular end surface 2h of the socket part 2. The insulation member 6j is provided between the push ring 5 and the locking member 6.SELECTED DRAWING: Figure 5

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 reception tube portion and hermetically connects the insertion tube portion.

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 for inserting and inserting and sealing the insertion pipe section of the fluid pipe into the reception pipe section of the conventional fluid pipe, a flange formed on the reception pipe section and an inner periphery of the opening of the flange are formed. A tapered surface, a sealing member inserted between the outer peripheral surface of the insertion tube portion and the tapered surface, an engaging portion formed on the outer peripheral surface of the insertion tube portion, and a split mounted on the engaging portion. There is known a pipe joint which includes a pressing ring, a fastening member for fastening the flange and the split pressing ring, and is hermetically connected by a sealing member inserted between the outer peripheral surface and the tapered surface of the insertion tube portion ( For example, see Patent Document 1).

特許第５１９２９７９号公報（第５、６頁、第１図）Patent No. 592979 (pages 5 and 6, 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 Literature 1, the rigidity of the split push ring is reduced because the split push ring engaged with the engaging portion has a two-part structure. 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, the external force acts as a force for detaching the insertion tube from the reception tube, and cannot be held by the two-piece structure having low rigidity. There is a problem that the part is detached.

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 in view of such a problem, and even when an external force such as a force due to an earthquake, unequal settlement, or a vibration load is applied, the connection between the receiving pipe portion and the insertion pipe portion is made. An object of the present invention is to provide a pipe joint that can prevent detachment.

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 on the receiving pipe portion, a seal member interposed between the receiving pipe portion and the insertion pipe portion, and an engaging portion formed on an outer peripheral surface of the insertion pipe portion, A pipe joint for sealingly connecting the insertion ring of the fluid pipe section to the reception pipe section of the fluid pipe section, comprising a pressing ring, a fastening member for fastening the flange and the pressing ring,
A locking member that can be engaged with the engaging portion, the locking member includes a tapered surface that contacts the pressing ring and a pressing surface that presses the seal member, and the seal 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 disposed so as to protrude outside the receiving pipe portion from an end surface of the flange, and the receiving pipe portion and the When a force acts in a direction in which the insertion tube section is detached and the locking member comes into contact with the pressing ring, a force is applied to the locking member in a direction in which the diameter is reduced.
According to this feature, a force acts in a direction in which the receiving pipe portion and the insertion tube portion of the pipe joint are separated, and when the locking member and the pressing ring come into contact with each other, a force acts in the direction in which the diameter of the locking member is reduced. The locking member is reduced in diameter to increase the hooking height when the locking member and the engaging portion are engaged, thereby preventing the receiving tube portion and the insertion 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
The locking member has a divided structure.
According to this feature, since the locking member having the divided structure can be engaged with the engagement portion from the radial outside, the locking member and the engagement portion are engaged with each other in accordance with the height of the engagement portion. The hooking height at that time can be adjusted to a required size, and thus the detachment between the receiving tube portion and the insertion tube portion of the pipe joint can be prevented.

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
The pressing ring is integrally formed in an annular shape, and an inner diameter of the pressing ring is larger than an outer diameter of the engaging portion.
According to this feature, the rigidity can be increased by integrally forming the pressing ring in an annular shape. When the high-rigidity pressing ring comes into contact with the locking member, the locking member is further reduced in diameter, and is engaged with the locking member. The hook height with the mating portion is increased, and the detachment between the receiving pipe portion and the insertion pipe 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
The inner diameter of the locking member is substantially the same as the outer diameter 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 formed as an integrated structure having high rigidity. Engagement with the engaging portion can prevent detachment of 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
The pressing ring and the locking member are in contact with each other via an insulating member at least on a tapered surface.
According to this feature, since the pressing ring and the locking member come into contact with each other via the insulating member at least on the tapered surface, the locking member is compressed without applying an excessive force to the insulating member between the pressing ring and the locking member. A force can be uniformly applied in the radial direction, and thus, separation between the receiving tube portion and the insertion tube portion of the pipe joint can be prevented 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。1 is a schematic diagram illustrating a fluid pipeline to which a pipe joint according to a first embodiment is 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。FIG. 3 is a view taken along the line AA in FIG. 2. 管継手の分解側断面図である。It is an exploded 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 side sectional view of a pipe joint of a modification of Example 1, and (b) is a side cross section of a 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 modification. 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 a 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。It is a sectional side view of a pipe joint of a modification in Example 2. 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. 14 is a side sectional view of a pipe joint of another modification 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。 Embodiments for implementing a pipe joint according to the present invention will be described below based on embodiments.

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。 First Embodiment A pipe joint according to a first embodiment will be described with reference to FIGS. First, reference numeral 1 in FIG. 1 denotes 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 pipeline 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 pipeline 100 of the present embodiment is connected to a pipe bridge 100a made of, for example, stainless steel or steel, which extends over a river or the like, via a telescopic or flexible pipe 101 or the like. For example, a connection 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 connection portion 100b via a telescopic or flexible tube 101 (not shown) and extends. Is configured. The tube bridge portion 100a and the connecting portion 100b absorb an external force that causes the tube bridge portion 100a and the connecting portion 100b to move relative to each other, such as expansion and contraction, bending, and twisting, due to a temperature change, etc., between the tube bridge portion 100a and the connection portion 100b. It is supposed to. In the buried portion 100c, although not particularly shown, a telescopic or flexible tube 101 is provided at an arbitrary position. The above-mentioned telescopic or flexible tube 101 is made of, for example, a bellows type, rubber or metal. In the present embodiment, the fluid in the fluid pipe is agricultural water, but the fluid flowing inside the fluid pipe is not necessarily limited to agricultural water, for example, industrial water, tap water, sewage, etc. It may be a gas-liquid mixture with a liquid. Furthermore, the fluid pipeline is not necessarily limited to the one configured by the pipe bridge 100a, the connecting part 100b, and the buried part 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 an end of the buried portion 100c when laying the buried portion 100c with respect to the connection portion 100b supported by the concrete abutment 12 serving as the abutment of the pipe bridge portion 100a. A mode used when connecting the receiving tube portion 2 and the insertion tube portion 3 extending from the connecting portion 100b will be described. As shown in FIG. 2, the pipe joint 1 mainly includes a receiving pipe section 2, an insertion pipe section 3, a pressing ring 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 section 2, the insertion pipe section 3, the pressing ring 5, the locking member 6, and the sealing member 4 will be described. As shown in FIG. 2 to FIG. 4, the receiving pipe section 2 is mainly composed of a fluid pipe section 2p, a receiving section 2a, and a flange 2b provided at an open end of the receiving section 2a. In addition, the receiving pipe portion 2 is connected to the flange end surface 2c, is formed to be tapered surface 2d formed to be gradually reduced in diameter, is connected to the tapered surface 2d, and is formed substantially parallel to the pipe axis BB of the receiving pipe portion 2. An annular end face 2f, which is continuous with the cylindrical surface and is formed substantially perpendicular to the pipe axis BB of the receiving pipe section 2, and which is continuous with the annular end face 2f and is substantially parallel to the pipe axis BB of the receiving pipe section 2. An annular end face 2h, which is connected to the cylindrical surface 2g and is substantially perpendicular to the pipe axis B-B of the receiving pipe section 2, is connected to the cylindrical face 2g, and a pipe axis B- of the receiving pipe section 2 which is connected to the annular end face 2h. An inner peripheral surface 2j formed substantially parallel to B is provided. Further, a plurality of bolt holes 21 are provided in the flange 2b. The bolt hole 21 has a slightly larger diameter than the bolt 8. Further, the receiving tube portion 2 is made of ductile cast iron, and is rust-proofed or insulated by coating or rubber lining. Particularly, the cylindrical surface 2g and the annular end surface 2h of the receiving tube portion 2 are insulated by the insulating member 2k. By providing the insulating member 2k, electrical contact is prevented when the inlet tube portion 2 and the inlet tube portion 3 are formed of different types of metals, and dissimilar metals contact each other via a fluid such as water. By doing so, galvanic corrosion that occurs can be prevented. Further, when the insertion tube portion 3 moves to the annular end surface 2h side of the reception tube portion 2 by an 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 insulating treatment such as nylon coating, rubber lining, plastic coating, or epoxy resin powder coating. The bolts 8 and the nuts 9 are made of steel, but are preferably made of 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 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 on an outer peripheral portion of the insertion portion 3a. It has a convex portion 3b as an engaging portion of the present invention, and a fluid pipe portion 3d extending on the opposite side of the open end portion 3c from the convex portion 3b. The insertion tube portion 3 is formed of a metal such as steel or stainless steel. In the case of steel, it goes without saying that the surface is rustproofed 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 a pipe line. You may.

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 press wheel 5 will be described with reference to FIGS. The press wheel 5 is formed of an annular member formed of, for example, ductile cast iron and integrally formed. Further, the pressing wheel 5 is connected to the inner peripheral surface 5f and gradually increases in diameter. The tapered surface 5b is connected to the tapered surface 5b, and the inner peripheral surface 5c is formed substantially parallel to the pipe axis BB. An end surface 5d that comes into contact with the end surface 2c and an end surface 5e pressed by the nut 9 and the washer 10 from the opposite side of the end surface 5d are provided. The inner diameter of the inner peripheral surface 5f of the pressing ring 5 is formed to be larger than the outer diameter of the convex portion 3b, so that the pressing ring 5 can be loosely fitted to the outer circumference of the insertion opening 3a, the convex portion 3b, and the fluid pipe portion 3d. ing. Further, a plurality of bolt holes 22, 22,... Are provided in the extension 5a of the pressing wheel 5. The bolt hole 22 has a slightly larger diameter than the bolt 8. In this case, the pressing wheel 5 can be formed by an insulation treatment such as nylon coating, rubber lining, plastic coating, or epoxy resin powder coating.

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 in the circumferential direction or integrally formed. Further, the locking member 6 is connected to the outer peripheral surface 6a, a tapered surface 6b which is connected to the outer peripheral surface 6a and gradually increases in diameter, is connected to the tapered surface 6b, and is connected to the outer peripheral surface 6c and the outer peripheral surface 6c formed substantially parallel to the pipe axis BB. The flank 6d, the pressing surface 6e connected to the flank 6d and pressing the seal member, the groove 6f connected to the pressing surface 6e, the contact surface 6g connected to the groove 6f and abutting on the projection 3b, and the inner peripheral surface 6h connected to the contact surface 6g are formed. Have. The tapered surface 6b is in contact with at least the tapered surface 5b of the press wheel 5 via an insulating member 6j described later. In the case where the locking member 6 is divided into a plurality of parts in the circumferential direction, the protrusions are formed so that the hooking height between the protrusion 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 hooking height capable of preventing the receiving pipe section 2 and the insertion pipe section 3 from being separated from each other. On the other hand, in the case of integrally forming, before welding the convex portion 3b of the insertion tube portion 3, the pressing ring 5 and the locking member 6 are inserted into the insertion tube portion 3 like a loose flange in advance, and then the projection is formed. The part 3b is assembled by welding. When the insertion can be performed, the assembling may be performed by inserting the pressing ring 5 and the locking member 6 toward the projection 3b from the side opposite to the opening end 3c of the insertion tube section 3. Further, the protrusion 3b may be formed to have substantially the same outer diameter as that of the protrusion 3b so that the locking member 6 having high rigidity can hold the protrusion 3b.

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 6j is provided on the outer peripheral surface 6a, the tapered surface 6b, and the outer peripheral surface 6c of the locking member 6, and the locking member 6 has an insulating member on at least the tapered surface 5b of the pressing ring 5. It is fitted to the pressing wheel 5 so as to be in contact with the pressing wheel 6j. Note that a convex portion 6m is formed on the insulating member 6j to facilitate the work of fitting the locking member 6 to the pressing wheel 5. When the convex portion 6m is formed on the insulating member 6j, the insulating member 6j hardly contacts the inner peripheral surface 5c of the pressing ring 5 when the locking member 6 is fitted to the inner peripheral surface 5c of the pressing ring 5, Since the convex portion 6m contacts and fits with the inner peripheral surface 5c of the pressing wheel 5, damage to the insulating member 6j can be prevented. Conversely, 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 pressing ring 5, so that the insulating member 6j may be damaged. And insulation integrity may not be maintained. In addition, by providing the insulating member 6j, electrical contact is prevented when the receiving tube portion 2, the insertion tube portion 3, the pressing ring 5, and the locking member are formed of different metals, and the dissimilar 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, rubber, or the like, or by performing 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 sealing 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 sealing member 4 is housed 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 insertion tube part 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。 An assembling procedure of the pipe joint 1 including the receiving pipe section 2, the insertion pipe section 3, the pressing ring 5, the locking member 6, and the seal member 4 will be described. As shown in FIG. 4, first, the pressing wheel 5 is inserted into the insertion tube portion 3 and loosely fitted on the outer periphery of the fluid tube portion 3d. At this time, since the inner diameter of the inner peripheral surface 5f of the pressing ring 5 is formed larger than the outer diameter of the convex portion 3b, the pressing ring 5 can move from the insertion port 3a side to the fluid pipe section 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 divided structure, the locking member 6 is disposed closer to the fluid pipe portion 3d of the insertion tube portion 3 than the convex portion 3b, and the locking member 6 is fitted to the pressing ring 5. Regardless of the height of the projection 3b, the locking member 6 can be arranged on the fluid pipe 3d side of the insertion pipe 3 from the outside in the radial direction. On the other hand, when the locking member has an integral structure, as described above, the pressing ring 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 to the pressing wheel 5 to be integrated. By integrating the locking member 6 and the pressing ring 5, even the divided locking member 6 is held by the integrated pressing ring 5, so that the rigidity can be increased and the insertion pipe of the pipe joint 1 can be improved. The rigidity sufficient to hold the force in the direction in which the portion 3 is detached 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 port 3 a, the insertion pipe section 3 is inserted into the reception pipe section 2. At this time, if necessary, a sliding material may be used.

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 press ring 5 and the bolt hole 21 of the flange 2b of the receiving tube portion 2 and tightened with the washer 10 and the nut 9, thereby inserting the receiving tube portion 2. When the mouth tube portion 3 is gradually pulled in the tube axis direction, the pressing surface 4a of the sealing member is pressed by the pressing surface 6e of the member in which the locking member 6 and the pressing ring 5 are integrated, and the taper of the receiving tube portion 2 is formed. It is compressed while being pressed 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 face 5d of the press wheel 5 and the flange end face 2c of the receiving pipe part 2 come into contact with each other. Usually, the tightening management of the bolt 8 and the nut 9 is performed by managing the tightening torque. However, in the pipe joint 1 according to the first embodiment, when the end face 5d of the press ring 5 and the flange end face 2c come into contact with each other, the tightening torque sharply increases. It is easy to determine the completion of tightening. Further, it can be visually confirmed that the end face 5d of the pressing wheel 5 and the flange end face 2c are in contact with each other. The relative displacement between the end face 5d of the press ring 5 and the flange end face 2c can be suppressed by tightly contacting and integrating the end face 5d of the press ring 5 and the flange end face 2c, so that the bending stress generated in the bolt can be reduced. At the same time, detachment of the insertion tube portion 3 from the reception 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 operation and effect of the first embodiment will be described with reference to FIGS. 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 for detaching the inlet tube portion 3 from the inlet tube portion 2, the insertion tube portion 3 The convex portion 3b comes into contact with the contact surface 6g of the locking member 6, the tapered surface 6b of the locking member 6 comes into contact with the tapered surface 5b of the pressing ring 5, and the external force is applied to the extending portion 5a of the pressing ring 5 and the receiving pipe. It is held by bolts 8 and nuts 9 for fastening the second flange 2b. Further, when a force is applied in a direction for detaching the insertion tube portion 3 from the reception tube portion 2, the tapered surface 6b of the locking member 6 comes into contact with the tapered surface 5b of the pressing ring 5, and the locking member 6 5b, the inner peripheral surface 6h of the locking member 6 is reduced in diameter, the hooking height between the locking member 6 and the projection 3b is increased, and the receiving pipe of the pipe joint 1 is received. The detachment between the section 2 and the insertion tube section 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 projection 3b from the outside in the radial direction, so that the projection 3b and the contact surface 6g of the locking member 6 are caught. The outer diameter of the convex portion 3b and the inner diameter of the inner peripheral surface 6h can be adjusted so that the height becomes a predetermined height. Separation can be prevented. Further, when the tapered surface 6b of the locking member 6 comes into contact with the tapered surface 5b of the pressing wheel 5 and a force acts in a direction in which the diameter of the locking member 6 is reduced from the tapered surface 5b, the inner periphery of the locking member 6 having the split configuration is formed. Since the diameter of the surface 6h is greatly reduced as compared with the locking member 6 of an integral structure, the hooking height between the locking member 6 and the projection 3b is further increased. Separation from the mouth tube portion 3 can be more strongly prevented.

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, since the rigidity is high when the locking member is formed integrally, when the tapered surface 6b of the locking member 6 comes into contact with the tapered surface 5b of the pressing ring 5, the pressing surface 6e side of the inner peripheral surface 6h of the locking member 6 is reduced in diameter. In addition, a force acts to further prevent the detachment of the receiving pipe section 2 and the insertion pipe section 3 of the pipe joint 1.

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 pressing ring 5 is formed integrally with the ring, the rigidity thereof is high, and the rigidity of the locking member 6 can be increased by fitting and integrating the locking member 6 having the divided configuration with the pressing ring 5 having high rigidity. In addition, the function of preventing the separation of the receiving pipe portion 2 and the insertion pipe portion 3 of the pipe joint 1 can be improved. Further, when the pressing ring 5 and the locking member 6 are both integrally formed, the rigidity is further increased, and the function of preventing the receiving pipe section 2 and the insertion pipe section 3 of the pipe joint 1 from being detached is further enhanced. Can be.

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 pressing ring 5 and the locking member 6 are in contact with each other via the insulating member at least at the tapered surfaces 5b, 6b, the locking is performed without applying excessive force to the insulating member between the pressing ring 5 and the locking member 6. A force can be evenly applied to the member 6 in the diameter-reducing direction, so that the detachment between the receiving pipe portion 2 and the insertion pipe portion 3 of the pipe joint 1 is prevented while ensuring insulation. Can be.

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。 As described above, the embodiments of the present invention have been described with reference to the drawings. However, the specific configuration is not limited to these embodiments, and even if there are changes and additions without departing from the gist of the present invention, they 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 above embodiment, as shown in FIGS. 2 and 4, the receiving pipe 2 is made of ductile cast iron, and the inserting pipe 3 is made of a dissimilar metal such as steel or stainless steel. An insulating member 6j is provided between the pressing wheel 5 and the locking member 6 to prevent electric corrosion. 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 is provided so that the pressing surface 6e does not contact the flange end surface 2c of the receiving tube portion 2. And a flank 6d.

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 a clearance surface on the locking member 6, the sealing member 4 is made to protrude from the flange end surface 2c, so that the pressing surface 6n of the locking member 6 and the receiving pipe are formed. By preventing contact with the flange end surface 2c of the portion 2, it is possible to reliably prevent electrolytic corrosion.

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. 5B, not only the surface where the locking member 6 comes into contact with the pressing ring 5, but also the locking member 6 comes into contact with the flange end surface 2 c of the receiving pipe portion 2 and the sealing member 4. By providing it also on the pressing surface 6p, it is possible to more reliably prevent electrolytic corrosion.

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 protrusion 3b so as to prevent the insertion tube 3 from moving in the direction in which the insertion tube 3 is separated from the reception tube 2. As shown in b), an annular groove is provided on the inner periphery of the locking member 6 so as to prevent not only the direction in which the receiving tube portion 2 and the insertion tube portion 3 are separated but also the movement in the pushing direction. Alternatively, the projection 3b can be held.

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 described above, the T-head bolt is used as the bolt 8 of the fastening member, but an insulating bolt 8 'is used instead. Here, the outer diameters of the flange 2'b and the pressing ring 5 'are increased in order to secure a space for using a tool for tightening the head 8'a of the insulating bolt 8'.

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 tube portion 2 ′ and the pressing ring 5 ′ is ductile cast iron, while the material of the insertion port 3 and the insulating bolt 8 ′ is stainless steel. Further, since the material of the locking member 6 is stainless steel or stainless cast steel, an insulating treatment is performed to prevent galvanic corrosion caused by direct contact between dissimilar metals or 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 insulated and coated with an insulating member 8'c, and the outer peripheral surface, inner peripheral surface, end surface, and bolt hole of the pressing ring 5' are provided. 22 'is insulated by the insulating member 5'g, and the surface of the locking member 6 except for the side facing the insertion opening 3 is insulated by the insulating member 6j. Furthermore, insulating washers 10a are arranged on both sides of the washer 10b to insulate between the bolt head 8'a and the flange 2'b and between the pressing ring 5 'and the nut 9. Here, the insulating member 8'c is sleeve-shaped and made of a material such as fluororesin such as PTFE and FET, polyvinyl chloride, epoxy, nylon, and synthetic rubber. The insulating member 5'g and the insulating member 6j are made of resin. Insulation such as nylon coating, rubber lining, plastic coating, epoxy resin powder coating, etc. may be performed in addition to press-fitting and bonding an insulator molded of the like. 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 washer 10b may be arranged on both sides of the insulating washer 10a for insulation. The washer 10b may be made of steel, stainless steel, or the like. It may be made of metal or resin such as PVC, PP, PC and the like.

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。 Further, in the embodiment of FIG. 6, similarly to FIG. 5B, not only the direction in which the receiving tube portion 2 'and the insertion tube portion 3 are detached, 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 acts, the opening end portion 3c of the insertion tube portion 3 becomes the annular end surface 2 'of the receiving tube portion 2'. h can be prevented. Therefore, only the cylindrical surface 2'g of the receiving tube portion 2 'is insulated by the insulating member 2'k. It goes without saying that both the cylindrical surface 2'g and the annular end surface 2'h of the receiving tube 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 spacer 23 made of resin is provided between the pressing ring 5 'and the flange 2'b, and the insulating member 5'g is scratched or peeled off due to friction between the pressing ring 5' and the flange 2'b. Has been prevented. However, when there is no fear of damage, 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。 Further, the receiving tube portions 2, 2 ', the insertion tube portion 3, the pressing rings 5, 5', and the locking member 6 are respectively formed of different kinds of metals, but all the members described above or an arbitrary plurality of members are used. The members may be made of the same kind of metal, and if they are made of the same kind of metal, they need not necessarily be insulated. It should be noted that all or any of the above-mentioned members are not necessarily made of metal, but 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。 Second Embodiment A pipe joint according to a 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 projection 3b as the engaging portion of the present invention, whereas in the pipe joint according to the second embodiment, the present invention In that the protrusion 6'f of the locking member 6 'is engaged with the recess 3'b serving as the engagement portion. However, the other configuration is the same as that of the pipe joint of the first embodiment, and a duplicate description will be 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 insertion pipe section 3 ′ of the fluid pipe section is inserted into the reception pipe section 2 ′ of the fluid pipe section and hermetically connected. , A flange 2′b formed on the receiving pipe 2 ′, a sealing member 4 interposed between the receiving pipe 2 ′ and the inserting pipe 3 ′, An insulating bolt 8 'as a fastening member for fastening the recess 3'b as an engaging portion of the present invention formed on the outer peripheral surface, the pressing ring 5', the flange 2'b and the pressing ring 5 'via the spacer 23. And a convex portion 6'f of the locking member 6 'that can be engaged with the concave portion 3'b. As in the first embodiment, when a force acts in a direction in which the receiving tube portion 2 'and the insertion tube portion 3' are separated and the locking member 6 'and the pressing ring 5' come into contact with each other, the locking member 6 ' The locking member 6 'receives a force in a direction in which the diameter is reduced by the pressing ring 5', and the locking member 6 'is reduced in diameter so that the convex portion 6'f of the locking member 6' and the concave portion 3'b of the insertion tube portion 3 'are hooked. The height is increased, and detachment between the receiving pipe 2 'and the insertion pipe 3' of the pipe joint 1 'can be strongly prevented. Further, the concave portion 3'b is formed with 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 the direction of being 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。 In FIG. 7 as well, the material of the receiving tube portion 2 ′ and the pressing ring 5 ′ is ductile cast iron, while the material of the inserting tube portion 3 ′, the bolt head 8a of the insulating bolt 8 ′ and the bolt shaft portion 8b is Since the locking member 6 'is made of stainless steel or cast stainless steel, galvanic corrosion generated by direct contact between dissimilar metals or electrically connected via a fluid such as water can be prevented. In order to prevent it, it is similarly insulated.

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 2 ′ may be formed as an insertion pipe 25 of a pipe joint. The insertion tube portion 25 is generally provided near the end portion of the insertion tube portion 25 so as to be compatible with an earthquake-resistant pipe joint and a pipeline in which a rubber ring, a lock ring, a lock ring holder, or the like is incorporated in a receiving port. Can 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。 Further, as another modification of the second embodiment, as shown in FIG. 9, the other end of the receiving tube portion 2 ′ is formed as a flexible tube side case 31 and configured as a telescopic flexible tube joint 30. Can also. The flexible tube side case 31 and the seat 32 formed at the other end of the receiving tube portion 2 ′ are formed by 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. Further, the spherical member 34 is disposed between the flexible tube side case 31 and the insertion tube portion 41, and the seal member 35 seals the space between the flexible tube side case 31 and the spherical member 34, and the seal member 36 Thereby, the space between the spherical member 34 and the insertion tube portion 41 is sealed. Further, a groove 41a is provided on the outer periphery of the insertion tube portion 41, and the groove 41a is provided to prevent the flexible tube side case 31 and the insertion tube portion 41 from being detached while permitting constant expansion and contraction. 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 flexible 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 a telescopic 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 inside the flexible tube side case 31. The pipe joint can move in the axial direction and rotate, and can be a pipe joint having elasticity 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 the second embodiment presses the seal member, as shown in FIG. 6, the surface where the locking member 6 and the seal member 4 come into contact with each other is connected to the end face 2′c of the flange 2′b. It may be made to protrude to the outside of the pipe part 2 ', or as shown in FIG. 7, the surface where the locking member 6' and the seal member 4 come into contact with each other can be changed from the end face 2'c of the flange 2'b to the receiving pipe part. The locking member 6 ′ may be made to enter the inside of the receiving tube 2 ′ so that the corner of the locking member 6 ′ comes into contact with the tapered surface 2 ′ d of the receiving tube 2 ′. Further, the end surface of the locking member 6 'may be brought into contact with the end surface 2'c of the flange 2'b (see FIG. 5B). In addition, a gap may be formed between the pressing surface 6n of the locking member 6 and the end surface 2c of the flange as a clearance for the compressed and deformed seal member 4 (see FIG. 5A). A notch that forms the above-mentioned gap may be provided so that the pressing surface of the above-mentioned portion contacts the end surface 2c of the flange (see FIG. 5B). Further, a 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 pressing wheel 5 'is used as a clearance serving as a clearance for 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。 In addition, the pipe joints of the first and second embodiments have been described as applied to straight pipe joints, but are not limited thereto, and pipe joints for sealingly connecting short pipes, different diameter pipes, valve pipe connection parts, and the like. Can also be used as In addition, the locking member is configured integrally or divided, but is not limited thereto, and may be formed in, for example, a substantially C-shape partially cut out in the circumferential direction. The pressing wheel is not necessarily limited to the one-piece annular structure, and may have a predetermined number of two or more divided structures. Further, the locking member is not necessarily limited to the two-part 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' port 2a port 2b, 2'b flange 2k, 2'k insulating member 3, 3 'port 3a, 3'a port 3b convex (Engagement part)
3'b recess (engagement part)
3d Fluid pipe part 4 Seal member 5, 5 'Press ring 5b Tapered surface 6, 6' Locking member 6b Tapered surface 6j, 6'j Insulating member 6m Convex portion 8 Bolt (fastening member)
8 'insulation bolt (fastening member)
9 Nut (fastening member)

Claims

A flange formed on the receiving pipe portion, a seal member interposed between the receiving pipe portion and the insertion pipe portion, and an engaging portion formed on an outer peripheral surface of the insertion pipe portion, A pipe joint which inserts an insertion pipe part of a fluid pipe part into a reception pipe part of a fluid pipe part, which is provided with an integrally formed pressing ring, and a fastening member for fastening the flange and the pressing ring. So,
A locking member that can be engaged with the engaging portion, wherein the locking member comes into contact with the receiving tube portion side via an insulating member, so that an opening end of the insertion tube portion is the receiving port; A pipe joint comprising an end portion for preventing contact with an annular end surface of a tube portion, and an insulating member provided between the pressing ring and the locking member.

The end portion of the locking member is configured such that the end surface of the pressing ring contacts the end surface of the flange via an insulating member, and the end portion of the locking member comes into contact with the receiving tube portion side via an insulating member, thereby forming the insertion tube. The pipe joint according to claim 1, wherein an opening end of the portion is prevented from contacting an annular end surface of the receiving tube portion.

3. The pipe joint according to claim 1, wherein the flange and the pressing ring are fastened with an insulating bolt serving as the fastening member via a spacer. 4.

4. The locking member according to claim 1, wherein the locking member is divided into a plurality of pieces in a circumferential direction or integrally formed, or is formed in a substantially C-shape partially cut out in a circumferential direction. 5. Pipe fittings.