JP5019971B2 - Pipe fitting - Google Patents

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JP5019971B2
JP5019971B2 JP2007167955A JP2007167955A JP5019971B2 JP 5019971 B2 JP5019971 B2 JP 5019971B2 JP 2007167955 A JP2007167955 A JP 2007167955A JP 2007167955 A JP2007167955 A JP 2007167955A JP 5019971 B2 JP5019971 B2 JP 5019971B2
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end surface
anticorrosion member
inner peripheral
tube
peripheral surface
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JP2009008125A5 (en
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猛文 石井
昇 菊地
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Cosmo Koki Co Ltd
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Description

本発明は、例えば下水道や上水道等の流体管において、一方の流体管と他方の流体管とを水密状態で接続するための管継手に係り、特に流体管の管端面の腐食を防止するための防食部材が設けられた管継手に関する。   The present invention relates to a pipe joint for connecting one fluid pipe and the other fluid pipe in a watertight state in fluid pipes such as sewers and waterworks, for example, and in particular for preventing corrosion of the pipe end face of the fluid pipe. The present invention relates to a pipe joint provided with an anticorrosion member.

従来、一方の流体管の挿口部を他方の流体管の受口部に挿入して例えば金属製の流体管同士を接続する際において、設置現場の状況等に応じて挿口部を有する管体を切断して長さを調整する場合がある。一般的にこのような金属製の管体の表面には、防食塗料等によるコーティングがなされているが、上記のように切断した場合には挿口部の管端面に金属素地が露出してしまうため、そのまま設置すると流体により挿口部の管端面が腐食するという問題があった。   Conventionally, when an insertion portion of one fluid pipe is inserted into a receiving portion of the other fluid pipe and, for example, metal fluid pipes are connected to each other, a pipe having an insertion portion according to the situation at the installation site, etc. The length may be adjusted by cutting the body. Generally, the surface of such a metal tube body is coated with an anticorrosive paint or the like, but when cut as described above, the metal substrate is exposed on the tube end face of the insertion portion. For this reason, if installed as it is, there is a problem that the pipe end surface of the insertion port is corroded by the fluid.

そこで、切断後に管端面を防食塗料等によりコーティングすることが考えられるが、現場における作業負荷が増大するため、このような問題を解決するものとして、例えば挿口管と受口管との間に共通して跨る筒状の防食部材を挿通し、挿口管及び受口管の内周面と筒状の防食部材の外周面との間を水密状態とすることで、挿口管の管端面の腐食を防止したもの等がある(例えば、特許文献1参照)。   Therefore, it is conceivable to coat the tube end surface with anticorrosion paint after cutting, but since the work load at the site increases, as a solution to such problems, for example, between the insertion tube and the receiving tube By inserting a common tubular anticorrosion member straddling and making the space between the inner peripheral surface of the insertion tube and the receiving tube and the outer peripheral surface of the tubular anticorrosion member, the tube end surface of the insertion tube (For example, refer to Patent Document 1).

特許第3138926号(第4頁、第1図)Japanese Patent No. 3138926 (page 4, Fig. 1)

しかしながら、上記特許文献1の記載の防食部材は、挿口管及び受口管の内周面に筒状部の外周を密接させて水の進入を防止することで挿口管の管端面の腐食を防止するものであり、受口管と挿口管とに跨って筒状の防食部材を挿通する必要があるため、挿口管と受口管との接続作業が煩雑になるばかりか、挿通後に筒状の防食部材の外周面を挿口管及び受口管の内周面に密接させる必要があるため、防食部材の構造が複雑になるという問題があった。   However, the anticorrosion member described in Patent Document 1 corrodes the tube end face of the insertion tube by bringing the outer periphery of the cylindrical portion into close contact with the inner peripheral surfaces of the insertion tube and the receiving tube to prevent water from entering. Since it is necessary to insert a cylindrical anticorrosive member across the receiving tube and the insertion tube, the connection work between the insertion tube and the reception tube becomes complicated, and the insertion There is a problem that the structure of the anticorrosion member becomes complicated because the outer peripheral surface of the cylindrical anticorrosion member needs to be brought into close contact with the inner peripheral surface of the insertion tube and the receiving tube later.

本発明は、このような問題点に着目してなされたもので、挿口部と受口部との接続作業を煩雑にすることなく、管端面への水の進入を確実に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 a pipe joint that can reliably prevent water from entering the pipe end face without complicating the connection work between the insertion part and the receiving part. The purpose is to provide.

上記課題を解決するために、本発明の請求項1に記載の管継手は、
一方の流体管を構成する挿口部と、
前記挿口部が挿入され、内周面に管軸とほぼ平行をなす環状の収容面と該収容面と連設し前記流体管の管軸に略直角に近い奥端面とが形成されて前記収容面と前記奥端面により形成された段差を有する他方の流体管を構成する受口部と、
環状に形成される弾性材から成り、前記挿口部の管端面と前記奥端面との間に配置されるとともに、前記受口部に挿入された挿口部の管端面と当接して該管端面を被覆する当接面を有する防食部材と、
を備え、
前記一方の流体管と前記他方の流体管とを水密状態で接続する管継手であって、
前記防食部材の係合部の外周側には、前記受口部の内周面の前記収容面と前記奥端面係合する外周面と背面とが周方向に沿って形成されており、前記係合部の外周面が前記受口部の内周面の前記収容面に、前記係合部の背面が前記受口部の内周面の前記奥端面に係合し、前記受口部の収容面と前記奥端面により形成された段差とを利用することで、前記防食部材の前記受口部に対する設置位置が決定され、
前記防食部材の前記係合部の内周側には、前記挿口部側に向けて延びるガイド面が形成されており、前記防食部材の内周面側には、前記挿口部の前記管端面と当接する前記当接面が形成されており、前記挿口部の前記管端面が前記防食部材の前記ガイド面により案内され、前記管端面と前記奥端面により前記防食部材の前記当接面が管軸方向に挟圧されて弾性変形し、前記当接面の内周面側が前記流体管軸方向に押し出されて膨出し、前記挿口部の内周面が前記当接面により被覆されるようになっていることを特徴としている。
この特徴によれば、受口部の収容面と奥端面により形成された段差とを利用し、防食部材を受口部内に挿通して係合部が受口部の内周面に係合することで、防食部材が受口部内の設置位置に位置ずれなく設置されるため、受口部に挿入した挿口部の管端面を防食部材に確実に当接させて被覆することができる。また、受口部に防食部材を設置して挿口部を防食部材のガイド面により案内されて挿入するだけの簡単な作業で挿口部の管端面の防食を図ることができ、従来のように挿口部を受口部に挿入する際に挿口部内に防食部材を挿通する等、防食部材が邪魔になることがないため、挿口部と受口部との接続作業が容易になる。そして、防食部材の当接面が挿口部の管端面により管軸方向に挟圧されて弾性変形し、当接面の内周面側が流体管軸方向に押し出されて膨出し、その棒出によって挿口部の内周面が被覆され、水密性が向上し、管端面の腐食を防止することができる。
In order to solve the above problem, a pipe joint according to claim 1 of the present invention is
An insertion portion constituting one fluid pipe,
The insertion port is inserted, and an annular housing surface that is substantially parallel to the tube axis is formed on the inner peripheral surface, and a back end surface that is connected to the housing surface and is substantially perpendicular to the tube axis of the fluid pipe is formed. A receiving portion that constitutes the other fluid pipe having a step formed by the accommodation surface and the back end surface ;
It is made of an elastic material formed in an annular shape, and is disposed between the tube end surface and the back end surface of the insertion portion, and comes into contact with the tube end surface of the insertion portion inserted into the receiving portion. An anticorrosion member having a contact surface covering the end surface;
With
A pipe joint for connecting the one fluid pipe and the other fluid pipe in a watertight state,
On the outer peripheral side of the engaging portion of the anticorrosion member , an outer peripheral surface and a rear surface that are engaged with the receiving surface and the inner end surface of the receiving portion are formed along the circumferential direction, on the housing surface of the outer peripheral surface of the engaging portion is an inner circumferential surface of the socket portion, the back of the engaging portion is engaged with the back end surface of the inner peripheral surface of the socket portion, said socket portion By utilizing the step formed by the housing surface and the back end surface, the installation position of the anticorrosion member with respect to the receiving portion is determined,
A guide surface extending toward the insertion port side is formed on the inner peripheral side of the engaging portion of the anticorrosion member, and the tube of the insertion port portion is formed on the inner peripheral surface side of the anticorrosion member. The contact surface that contacts the end surface is formed, the tube end surface of the insertion portion is guided by the guide surface of the anticorrosion member, and the contact surface of the anticorrosion member is formed by the tube end surface and the back end surface. Is elastically deformed by being pinched in the tube axis direction, the inner peripheral surface side of the contact surface is pushed out and bulged in the fluid tube axis direction, and the inner peripheral surface of the insertion portion is covered by the contact surface. It is characterized in that it is made as to that.
According to this feature, the engagement portion engages with the inner peripheral surface of the receiving portion by inserting the anticorrosion member into the receiving portion using the step formed by the receiving surface and the back end surface of the receiving portion. Thus, since the anticorrosion member is installed without being displaced at the installation position in the receiving part, the pipe end surface of the insertion part inserted into the receiving part can be reliably brought into contact with the anticorrosion member and covered. Moreover, the anticorrosion of the tube end surface of the insertion portion can be prevented by a simple operation by installing the anticorrosion member in the receiving portion and inserting the insertion portion guided by the guide surface of the anticorrosion member. Since the anticorrosion member does not get in the way, such as when the anticorrosion member is inserted into the insertion portion when the insertion portion is inserted into the reception portion, the connection work between the insertion portion and the reception portion becomes easy. . Then, the contact surface of the anticorrosion member is clamped in the tube axis direction by the tube end surface of the insertion portion and elastically deformed, and the inner peripheral surface side of the contact surface is pushed out in the fluid tube axis direction to bulge, As a result, the inner peripheral surface of the insertion portion is covered, water tightness is improved, and corrosion of the pipe end surface can be prevented.

本発明の請求項2に記載の管継手は、請求項1に記載の管継手であって、
前記防食部材の前記係合部の前記背面には、前記受口部の前記奥端面と対向する位置に、管軸方向に沿って係合凸部が形成されており、前記奥端面には、前記係合凸部が係合する被係合部が形成されていることを特徴としている。
この特徴によれば、係合部と受口部の内周面とが係合する係合延長を大きく取ることができ、防食部材を受口部にしっかりと設置することができると共に、奥端面に対する防食部材の位置ずれを確実に防止できるため、挿口部の管端面と防食部材とが当接する際における位置ずれも効果的に防止できる。そして、防食部材における奥端面との当接面が奥端面における防食部材の当接面が奥端面と当接するとともに、係合部が奥端面よりも管奥側の受口部の内周面と当接して受口部内に設置されるため、防食部材が、奥端面と受口部の内周面とに生じている既存の段差を利用して係合部が係合することになり、受口部の内周面に特段の加工等を施すことなく、防食部材の位置ずれが確実に防止される。
The pipe joint according to claim 2 of the present invention is the pipe joint according to claim 1,
On the back surface of the engagement portion of the anticorrosion member, an engagement convex portion is formed along the tube axis direction at a position facing the back end surface of the receiving portion, and on the back end surface, An engaged portion with which the engaging convex portion is engaged is formed.
According to this feature, it is possible to greatly increase the engagement extension in which the engaging portion and the inner peripheral surface of the receiving portion engage, and the anticorrosion member can be firmly installed in the receiving portion, and the rear end face Since the position shift of the anticorrosion member can be reliably prevented, the position shift when the pipe end surface of the insertion portion and the anticorrosion member abut can be effectively prevented. The contact surface of the anticorrosion member with the back end surface is in contact with the contact surface of the anticorrosion member at the back end surface with the back end surface, and the engaging portion is an inner peripheral surface of the receiving portion on the tube back side with respect to the back end surface. Since the anticorrosion member is installed in the receiving portion by abutting, the engaging portion is engaged using the existing step formed on the inner end surface of the inner end surface and the receiving portion. without performing any special processing or the like on the inner peripheral surface of the mouth portion, positional deviation of the anticorrosive members Ru is reliably prevented.

本発明の請求項3に記載の管継手は、請求項1または2に記載の管継手であって、
前記係合凸部は、前記奥端面よりも管奥側の内周面に係合可能に延設されていることを特徴としている。
この特徴によれば、防食部材における奥端面との当接面が奥端面と当接するとともに、係合部が奥端面よりも開口端側の受口部の内周面と当接して受口部内に設置されるため、奥端面と受口部の内周面とに生じている既存の段差を利用して係合部が係合することになり、防食部材の位置ずれが確実に防止される。また、挿口部を受口部に挿入する際において、挿口部が軸心からずれることがあっても、係合部の内周面を利用して軸心に向けて摺接案内され、管端面を防食部材により確実に被覆することが可能となる。
The pipe joint according to claim 3 of the present invention is the pipe joint according to claim 1 or 2,
The engaging convex portion is characterized in that it extends so as to be able to engage with the inner peripheral surface on the tube back side with respect to the back end surface.
According to this feature, the contact surface of the anticorrosion member with the back end surface is in contact with the back end surface, and the engaging portion is in contact with the inner peripheral surface of the receiving portion closer to the opening end than the back end surface. Therefore, the engaging portion is engaged using the existing step formed on the inner end surface of the rear end surface and the receiving portion, and the position shift of the anticorrosion member is reliably prevented. . Further, when inserting the insertion portion into the receiving portion, even if the insertion portion may deviate from the axis, it is slidably guided toward the axis using the inner peripheral surface of the engagement portion, It can be reliably cover the pipe end face by corrosion member and that Do.

本発明の実施例を以下に説明する。   Examples of the present invention will be described below.

本発明の実施例1を図面に基づいて説明すると、先ず図1は、本発明の実施例1における管継手の配設状況を示す概略図である。図2は、受口部と挿口部とを示す断面図である。図3(a)は、防食部材を示す正面図であり、(b)は、防食部材を示す右側面図であり、(c)は防食部材を示す左側面図であり、(d)は、図3(c)のA−A断面図である。図4(a)は、防食部材が受口部に未だ装着されていない状態を示す拡大断面図であり、(b)は、防食部材が受口部に挿入されている状態を示す拡大断面図であり、(c)は、防食部材が設置位置に装着された状態を示す拡大断面図である。図5(a)は、挿口部の管端面が未だ防食部材により被覆されていない状態を示す断面図であり、(b)は、挿口部が図5(a)の状態から挿入方向に挿入された状態を示す断面図である。図6(a)は、挿口部が図5(b)の状態からさらに挿入方向に挿入された後、挿口部の抜脱が規制された状態を示す断面図、(b)は、挿口部が図6(a)の状態から抜脱方向に移動した状態を示す断面図である。   Embodiment 1 of the present invention will be described with reference to the drawings. First, FIG. 1 is a schematic view showing an arrangement state of pipe joints in Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view showing the receiving portion and the insertion portion. 3 (a) is a front view showing the anticorrosion member, (b) is a right side view showing the anticorrosion member, (c) is a left side view showing the anticorrosion member, and (d) is It is AA sectional drawing of FIG.3 (c). FIG. 4A is an enlarged cross-sectional view showing a state in which the anticorrosion member is not yet attached to the receiving part, and FIG. 4B is an enlarged cross-sectional view showing a state in which the anticorrosion member is inserted into the receiving part. (C) is an enlarged sectional view showing a state where the anticorrosion member is mounted at the installation position. Fig.5 (a) is sectional drawing which shows the state by which the pipe end surface of the insertion part is not yet coat | covered with the anticorrosion member, (b) is an insertion part in the insertion direction from the state of Fig.5 (a). It is sectional drawing which shows the state inserted. FIG. 6A is a cross-sectional view showing a state in which the insertion portion is restricted from being inserted after the insertion portion is further inserted in the insertion direction from the state of FIG. 5B, and FIG. It is sectional drawing which shows the state which the part moved to the removal direction from the state of Fig.6 (a).

先ず、本発明の配管路4は、本実施例の図1にて示されるように、例えば地中に配設される直管11、或いはT字管若しくは管軸に沿って一部に曲部を有するエルボ管2または曲部を有するとともに、比較的短寸であるベンド管13等の金属製の流体管から構成されており、配管内部に形成される経路を、例えば上下水道やガスなどの流体が流下したり、或いは電線等が配線されたりするようになっている。   First, as shown in FIG. 1 of the present embodiment, the pipe line 4 of the present invention is, for example, a straight pipe 11 disposed in the ground, or a curved portion partially along a T-shaped pipe or a pipe axis. The elbow pipe 2 having a curved portion or a metal fluid pipe such as a bend pipe 13 having a relatively short length, and a path formed inside the pipe, for example, water and sewage or gas A fluid flows down or an electric wire or the like is wired.

特に、地中には既設管若しくは既設ケーブルなどの既設の埋設物3が埋設されていることが多く、該埋設物3を回避して配管路4を配設することが不可避であり、エルボ管2、直管11、ベンド管13を適宜組み合わせて、該管同士を管継手1、100を介して接続することにより所望の配管経路を構成できる。このように配管路4を構成する部材の種類は多岐にわたり、各々の部材を接続する管継手については、配管内部を流下する流体が外部に漏洩することなく密封することが必要とされる。   In particular, existing buried objects 3 such as existing pipes or existing cables are often buried in the ground, and it is inevitable to arrange the piping 4 while avoiding the buried objects 3. 2, a straight pipe 11 and a bend pipe 13 are appropriately combined, and the pipes can be connected to each other via the pipe joints 1 and 100 to form a desired pipe path. As described above, the types of members constituting the pipe line 4 are various, and the pipe joints connecting the respective members are required to be sealed without leaking the fluid flowing down inside the pipe.

また、エルボ管2、直管11及びベンド管13の夫々の両端には、一方の管体を他方の管体に挿入して接続するために一端に形成された大径をなす受口部5と、他端に形成された挿口部12と、を有しており、これら挿口部12及び受口部5は管継手1,100の一部を構成している。また、これら各流体管の表面(内周面、外周面、管端面)には防食塗料等が塗布され、防食用のコーティング層が形成されている。   Further, at both ends of the elbow pipe 2, the straight pipe 11 and the bend pipe 13, a receiving portion 5 having a large diameter formed at one end in order to insert and connect one pipe body to the other pipe body. And the insertion portion 12 formed at the other end, and the insertion portion 12 and the receiving portion 5 constitute a part of the pipe joints 1 and 100. Moreover, anticorrosion paint etc. are apply | coated to the surface (an inner peripheral surface, an outer peripheral surface, a pipe end surface) of these each fluid pipe | tube, and the coating layer for anticorrosion is formed.

尚、管継手1及び各管継手100はほぼ同様に構成されているため、以下においては、エルボ管2の受口部5と直管11の挿口部12とからなる管継手1を管継手の一例として説明し、他の管継手100に関する説明は省略することとする。   In addition, since the pipe joint 1 and each pipe joint 100 are comprised in substantially the same way, below, the pipe joint 1 which consists of the receiving part 5 of the elbow pipe 2 and the insertion part 12 of the straight pipe 11 is used as a pipe joint. It will be described as an example, and description regarding the other pipe joint 100 will be omitted.

図2に示されるように、本実施例における管継手1は、受口部5を備えたエルボ管2と、受口部5の内周面に挿入される挿口部12を備えた直管11と、弾性を有し受口部5の内周面と受口部5に挿入される挿口部12の外周面12aとの間から流体が漏出することを防止するシール部材8と、挿口部12の管端面12cの腐食を防止する防食部材14と、受口部5から挿口部12の抜脱を規制する抜脱規制手段15と、から構成されている。   As shown in FIG. 2, the pipe joint 1 in this embodiment includes an elbow pipe 2 having a receiving portion 5 and a straight pipe having an insertion portion 12 inserted into the inner peripheral surface of the receiving portion 5. 11, a sealing member 8 that has elasticity and prevents leakage of fluid from between the inner peripheral surface of the receiving port 5 and the outer peripheral surface 12a of the insertion port 12 inserted into the receiving port 5. The anti-corrosion member 14 for preventing the corrosion of the pipe end surface 12c of the mouth portion 12 and the removal restriction means 15 for restricting the removal of the insertion portion 12 from the receiving portion 5 are configured.

管継手1の接続については後述するが、この挿口部12が受口部5に図2紙面右側に向かう挿入方向に挿入され、抜脱規制手段15で受口部5から挿口部12の抜脱を規制する。以下、図2紙面左側から右側に向かう方向を挿入方向として説明する。尚、後述する図5(b)においては、挿口部12が受口部5から抜け方向に移動していることが示されているが、図5(b)の紙面右側から左側に向かう方向を抜脱方向として説明する。   Although the connection of the pipe joint 1 will be described later, the insertion portion 12 is inserted into the receiving portion 5 in the insertion direction toward the right side in FIG. 2, and the removal restricting means 15 connects the receiving portion 5 to the insertion portion 12. Regulate withdrawal. Hereinafter, the direction from the left side to the right side of FIG. 2 will be described as the insertion direction. In FIG. 5B, which will be described later, it is shown that the insertion portion 12 is moved away from the receiving portion 5, but the direction from the right side to the left side in FIG. 5B. Is described as the removal direction.

図2に示されるように、挿口部12の内径(コーティング層12dの内径)は、エルボ管2の管奥側の内周面5gの内径と略同径であり、挿口部12の外径は、受口部5の内径よりもわずかに小径であって、直管11の外周面12aの先端近傍には、面取り加工が施されている。また、挿口部12の先端には、挿口部12の外周面12aと挿口部12の内周面12bと、に連続する周方向に沿って形成された管端面12cを有している。尚、この管端面12cは後述する現場における切断により金属素地が露呈した面となっている。   As shown in FIG. 2, the inner diameter of the insertion portion 12 (the inner diameter of the coating layer 12 d) is substantially the same as the inner diameter of the inner peripheral surface 5 g of the elbow pipe 2 on the inner side of the elbow pipe 2. The diameter is slightly smaller than the inner diameter of the receiving port 5, and chamfering is performed near the tip of the outer peripheral surface 12 a of the straight pipe 11. Further, at the distal end of the insertion portion 12, there is a tube end surface 12 c formed along the circumferential direction continuous to the outer peripheral surface 12 a of the insertion portion 12 and the inner peripheral surface 12 b of the insertion portion 12. . In addition, this pipe end surface 12c is a surface where the metal substrate is exposed by cutting at a site to be described later.

シール部材8と防食部材14が装着されるエルボ管2の受口部5の内部には、エルボ管2の開口端側に周方向に沿って設けられた凹部5aが形成されている。尚、特に図示しないが、受口部5の内部を形成する内周面にも、挿口部12と同様にコーティング層が薄層に設けられている。   A concave portion 5 a provided along the circumferential direction on the opening end side of the elbow pipe 2 is formed inside the receiving portion 5 of the elbow pipe 2 to which the seal member 8 and the anticorrosion member 14 are attached. Although not particularly shown, a coating layer is provided in a thin layer on the inner peripheral surface forming the interior of the receiving portion 5 as well as the insertion portion 12.

凹部5aよりも管奥側の内周面には、管軸Cとほぼ平行をなす収容面5cが形成されており、この収容面5cの管奥側の端部から、収容面5cよりも小径の内周面5gに連設するように、管軸Cに略直角に近い奥端面5dが形成されている。すなわち、収容面5cと奥端面5dとで段差が形成されている。この奥端面5dには、既存の受口部5の開口端側に開口した凹溝50が環状に特段加工されており、この凹溝50は、後述する防食部材14の係合凸部21が嵌合される被係合部として形成されている(図4(c)参照)。   A housing surface 5c that is substantially parallel to the tube axis C is formed on the inner peripheral surface on the back side of the tube with respect to the recess 5a. From the end of the housing surface 5c on the back side of the tube, the diameter is smaller than that of the housing surface 5c. A rear end surface 5d that is substantially perpendicular to the tube axis C is formed so as to be connected to the inner peripheral surface 5g. That is, a step is formed between the accommodation surface 5c and the back end surface 5d. A concave groove 50 opened on the open end side of the existing receiving portion 5 is specially processed in an annular shape on the rear end surface 5d. The concave groove 50 has an engagement convex portion 21 of the anticorrosion member 14 described later. It is formed as an engaged portion to be fitted (see FIG. 4C).

また、図4(a)に示されるように、凹溝50の外側周面50aは端面50bに向かって漸次縮径するテーパ面状に形成されているとともに、内側周面50cは端面50bに向かって漸次拡径するテーパ面状に形成されており、すなわち凹溝50は、受口部5の開口端側に向かって漸次拡開して形成されており、後述する係合凸部21が凹溝50に係合される際において、係合凸部21が凹溝50に挿入されやすいようになっている。   As shown in FIG. 4A, the outer peripheral surface 50a of the groove 50 is formed in a tapered surface shape that gradually decreases in diameter toward the end surface 50b, and the inner peripheral surface 50c faces the end surface 50b. In other words, the groove 50 is formed so as to gradually expand toward the opening end side of the receiving portion 5, and an engaging convex portion 21 described later is concave. When engaged with the groove 50, the engaging convex portion 21 is easily inserted into the concave groove 50.

シール部材8は、図2に示されるように、受口部5の内周面に周方向に沿って形成される凹部5aに嵌合される嵌合部8aと、受口部5の内周面と受口部5に挿入される挿口部12の外周面12aとの間隙を水密的に密封するバルブ部8cと、を有しており、外径が受口部5の内径と略同径のリング体からなり、弾性を有するゴム体からなる(図5(a)参照。)。   As shown in FIG. 2, the seal member 8 includes a fitting portion 8 a that is fitted in a recess 5 a that is formed along the circumferential direction on the inner peripheral surface of the receiving portion 5, and the inner periphery of the receiving portion 5. And a valve portion 8c for watertightly sealing a gap between the surface and the outer peripheral surface 12a of the insertion portion 12 to be inserted into the receiving portion 5, and the outer diameter is substantially the same as the inner diameter of the receiving portion 5. It consists of a ring body having a diameter and a rubber body having elasticity (see FIG. 5A).

シール部材8は、受口部5の内周面に形成される凹部5aに嵌合部8aが周方向に亘って嵌合されている(図5(a)参照。)また、バルブ部8cは、該嵌合された状態において、図2に示されるように、直管11の挿口部12が未だ挿入されずに、バルブ部8cの圧縮がされない状態において、断面形状が略円形に形成されているとともに、嵌合部8aと比較して、内周面が管軸Cに向かって膨出している。   The seal member 8 has a fitting portion 8a fitted in a recess 5a formed on the inner peripheral surface of the receiving portion 5 in the circumferential direction (see FIG. 5A). In the fitted state, as shown in FIG. 2, the insertion portion 12 of the straight tube 11 is not yet inserted, and the valve portion 8c is not compressed, and the cross-sectional shape is formed in a substantially circular shape. In addition, the inner peripheral surface bulges toward the tube axis C as compared with the fitting portion 8a.

抜脱規制手段15は、受口部5の外端近傍の外周面に周方向に所定間隔おきに複数形成されたボルト孔5bと、エルボ管2の外方から管軸Cに対し直交する方向に向かってボルト孔5bに螺挿された押し込みボルト9と、押し込みボルト9の先方であって、受口部5の外端近傍の内周面に周方向に所定間隔おきに複数(本実施例では60度間隔おきに6個)形成された円弧溝7と、該円弧溝7内に配置され、先端に尖鋭刃10aを有している複数の固定つめ10と、から構成されており、この抜脱規制手段15により、受口部5と挿口部12とが接続され、受口部5からの挿口部12の抜脱を規制できるようになっている。   The extraction restriction means 15 includes a plurality of bolt holes 5b formed at predetermined intervals in the circumferential direction on the outer peripheral surface in the vicinity of the outer end of the receiving portion 5, and a direction orthogonal to the tube axis C from the outside of the elbow pipe 2. And a plurality of push bolts 9 screwed into the bolt holes 5b, and a plurality of the bolts at predetermined intervals in the circumferential direction on the inner peripheral surface in the vicinity of the outer end of the receiving portion 5 (the present embodiment). 6 at intervals of 60 degrees), and a plurality of fixed claws 10 disposed in the arc groove 7 and having a sharp edge 10a at the tip. The outlet portion 5 and the insertion portion 12 are connected to each other by the removal restriction means 15 so that the removal of the insertion portion 12 from the reception portion 5 can be restricted.

また、図2に示されるように、挿口部12が挿入されない状態においては、後述する挿口部12の挿入の邪魔にならないように、固定つめ10の尖鋭刃10aが、受口部5の内周面よりも外方に退避している。尚、押し込みボルト9は、必ずしも管軸に対し直交する方向に螺挿されるに限られず、管軸に対し平行若しくは斜方向に螺挿されるものであってもよい。   In addition, as shown in FIG. 2, in a state where the insertion portion 12 is not inserted, the sharp blade 10 a of the fixed claw 10 is attached to the receiving portion 5 so as not to interfere with the insertion of the insertion portion 12 described later. Retreats outward from the inner peripheral surface. The push-in bolt 9 is not necessarily screwed in a direction orthogonal to the tube axis, and may be screwed in a direction parallel or oblique to the tube axis.

防食部材14は、図2、図3(a)〜(c)に示されるように、環状に形成された弾性を有するゴム体からなり、この防食部材14は、図3(d)に示されるように、断面視略コ字形状に形成されている。   As shown in FIGS. 2 and 3A to 3C, the anticorrosion member 14 is made of an elastic rubber body formed in an annular shape, and the anticorrosion member 14 is shown in FIG. 3D. Thus, it is formed in the cross-sectional view substantially U-shape.

この防食部材14における挿口部12の管端面12cが当接する当接部には、図2、図3(a)〜(d)に示すように、後述する挿口部12の管端面12cに押圧される膨出部17が形成されている。この膨出部17は、周方向の中央部が外周側及び内周側よりも挿口部12側(図3(d)の紙面左側)に向けて膨出するように形成されており、該膨出部17の表面は、後述する挿口部12が挿入された状態において挿口部12の管端面12cと当接する湾曲状の当接面17aとされている(図5(a)参照)。   As shown in FIGS. 2 and 3 (a) to 3 (d), the contact portion of the anticorrosion member 14 with which the tube end surface 12 c of the insertion portion 12 abuts is connected to a tube end surface 12 c of the insertion portion 12 described later. A bulging portion 17 to be pressed is formed. The bulging portion 17 is formed such that the central portion in the circumferential direction bulges toward the insertion portion 12 side (the left side of the drawing in FIG. 3D) from the outer peripheral side and the inner peripheral side. The surface of the bulging portion 17 is a curved contact surface 17a that contacts the tube end surface 12c of the insertion portion 12 in a state in which the insertion portion 12 described later is inserted (see FIG. 5A). .

防食部材14の内周側には、図2、図3(a)〜(d)に示すように、当接面17aの内周側端部より挿口部12側に向けて突出する内周当接部18が周方向に沿って形成されている。また、この内周当接部18の膨出部17側の周面、すなわち内周当接部18の外周面は、当接面17aの外周端縁部から連設され、挿口部12側に向けて延びる内周当接面18aとされている。   As shown in FIGS. 2 and 3 (a) to 3 (d), the inner periphery of the anticorrosion member 14 protrudes from the inner peripheral end of the contact surface 17a toward the insertion port 12 side. The contact part 18 is formed along the circumferential direction. Further, the peripheral surface of the inner peripheral contact portion 18 on the bulging portion 17 side, that is, the outer peripheral surface of the inner peripheral contact portion 18 is continuously provided from the outer peripheral edge of the contact surface 17a. It is set as the inner peripheral contact surface 18a extending toward the surface.

この内周当接面18aは、後述するように、挿口部12が受口部5に挿入される際、受口を広げることにより挿口部12が受口部5に挿入されやすいように、挿口部12の内周面12bに対し漸次離間するテーパ面状に形成されているとともに(図5(a)参照)、防食部材14が管端面12cを被覆している状態において、挿口部12の内周面12bに密着するように構成されている。   As will be described later, the inner peripheral abutment surface 18a is configured such that when the insertion opening 12 is inserted into the receiving opening 5, the insertion opening 12 is easily inserted into the receiving opening 5 by widening the receiving opening. In the state in which the anticorrosion member 14 covers the tube end surface 12c, the taper surface is formed so as to gradually separate from the inner peripheral surface 12b of the insertion portion 12 (see FIG. 5A). It is comprised so that it may closely_contact | adhere to the internal peripheral surface 12b of the part 12. FIG.

防食部材14の背面19は、図3(a)〜(d)、図4(c)に示すように、奥端面5dと略平行に形成されており、後述するように挿口部12が挿入された状態において奥端面5dに密接して、流体の漏洩を防止するようになっている。   As shown in FIGS. 3A to 3D and 4C, the back surface 19 of the anticorrosion member 14 is formed substantially parallel to the back end surface 5d, and the insertion portion 12 is inserted as will be described later. In this state, it is in close contact with the back end surface 5d to prevent fluid leakage.

この背面19には、奥端面5dとの対向する位置に凹溝50に向かって突設され、環状に形成された係合部としての係合凸部21と、背面19の外周側に防食部材24が受口部5に設置された状態において奥端面5dよりも受口部5の開口端側に延設され、環状に形成された係合部としての係合部16と、が形成されており、後述するように、奥端面5dと背面19が当接する状態で防食部材14が設置される設置位置が決定できるようになっている(図4(c)参照。)。   On the back surface 19, an engagement convex portion 21 as an engagement portion formed in an annular shape is provided so as to project toward the groove 50 at a position facing the back end surface 5 d, and an anticorrosion member is provided on the outer peripheral side of the back surface 19. In the state in which 24 is installed in the receiving portion 5, an engaging portion 16 is formed as an engaging portion that extends from the back end surface 5d to the opening end side of the receiving portion 5 and is formed in an annular shape. As will be described later, the installation position where the anticorrosion member 14 is installed can be determined in a state where the back end surface 5d and the back surface 19 are in contact with each other (see FIG. 4C).

また、係合凸部21の外側周面21aは端面21bに向かって漸次縮径するテーパ面状に形成されているとともに、内側周面21cは端面21bに向かって漸次拡径するテーパ面状に形成されており、すなわち係合凸部21は端面21bに向かって漸次縮径されており、係合凸部21が凹溝50に挿入されやすいようになっている。   The outer peripheral surface 21a of the engaging convex portion 21 is formed in a tapered surface shape that gradually decreases in diameter toward the end surface 21b, and the inner peripheral surface 21c is formed in a tapered surface shape that gradually increases in diameter toward the end surface 21b. In other words, the engagement convex portion 21 is gradually reduced in diameter toward the end surface 21 b, so that the engagement convex portion 21 can be easily inserted into the groove 50.

端面21bは、挿口部12の挿入前の状態において、凹溝50の端面50bと当接するように形成されている(図4(c)参照。)。   The end surface 21b is formed so as to contact the end surface 50b of the concave groove 50 in a state before the insertion portion 12 is inserted (see FIG. 4C).

また、係合部16の膨出部17側の周面、すなわち係合部16の内周面は、当接面17aの外周端縁部から連設され、挿口部12側に向けて延びるガイド面16aとされており、このガイド面16aは、挿口部12が受口部5に挿入される際において、挿口部12の外周面12aを軸心に向けてガイドするために、先端から当接面17aに向けて漸次縮径するテーパ面状に形成されている。   Further, the peripheral surface of the engaging portion 16 on the bulging portion 17 side, that is, the inner peripheral surface of the engaging portion 16 is continuously provided from the outer peripheral edge of the contact surface 17a and extends toward the insertion portion 12 side. The guide surface 16a is a distal end for guiding the outer peripheral surface 12a of the insertion portion 12 toward the axial center when the insertion portion 12 is inserted into the receiving portion 5. Is formed in a tapered surface shape that gradually decreases in diameter toward the contact surface 17a.

防食部材14の外径は、受口部5の収容面5cにおける内径とほぼ同径に形成されており、図4(c)に示されるように受口部5内に装着されて収容された状態において、防食部材14の外周面である係合部16の外周面20が受口部5の収容面5cに密接するようになっている。   The outer diameter of the anticorrosion member 14 is formed to be approximately the same as the inner diameter of the receiving surface 5c of the receiving portion 5, and is mounted and received in the receiving portion 5 as shown in FIG. 4 (c). In the state, the outer peripheral surface 20 of the engaging portion 16, which is the outer peripheral surface of the anticorrosion member 14, comes into close contact with the receiving surface 5 c of the receiving portion 5.

次に、本発明の管継手1の接続について説明する。   Next, the connection of the pipe joint 1 of the present invention will be described.

先ず、図4(a)、(b)に示されるように、エルボ管2の管端開口から受口部5内に防食部材14を挿入する。受口部5の管奥側に挿入していくと、防食部材14の係合部16の管奥側先端が受口部5の収容面5cと当接し、さらに防食部材14を管奥側に挿入することにより、係合部16の外周面20が受口部5の収容面5cと当接し、防食部材14の軸心が受口部5の軸心と合わせて防食部材14が挿入されることになる。   First, as shown in FIGS. 4A and 4B, the anticorrosion member 14 is inserted into the receiving portion 5 from the tube end opening of the elbow tube 2. When inserted into the tube back side of the receiving part 5, the tube back side tip of the engaging part 16 of the anticorrosion member 14 comes into contact with the receiving surface 5c of the receiving part 5, and the anticorrosion member 14 is further moved to the pipe back side. By inserting, the outer peripheral surface 20 of the engaging portion 16 comes into contact with the receiving surface 5 c of the receiving portion 5, and the anticorrosive member 14 is inserted with the axis of the anticorrosive member 14 aligned with the axial center of the receiving portion 5. It will be.

さらに防食部材14が管奥側に挿入されると、図4(b)に示されるように、端面21bが凹溝50の開口に到達する。この状態においては、係合凸部21の外側周面21a,内側周面21cと、凹溝50の外側周面50a,内側周面50cとは、それぞれ管奥側に向けて縮径するテーパ面状に形成されているため、凹溝50の間口が広がっており、凹溝50内に係合凸部21が嵌合しやすい。   When the anticorrosion member 14 is further inserted into the back side of the pipe, the end surface 21b reaches the opening of the groove 50 as shown in FIG. In this state, the outer peripheral surface 21a and the inner peripheral surface 21c of the engaging convex portion 21, and the outer peripheral surface 50a and the inner peripheral surface 50c of the groove 50 are respectively tapered surfaces that reduce in diameter toward the back side of the tube. Since the groove is formed in a shape, the opening of the groove 50 is widened, and the engagement protrusion 21 is easily fitted in the groove 50.

そして、図4(b)の状態から、防食部材14がさらに管奥側に挿入されると、係合凸部21におけるテーパ面状の外側周面21a,内側周面21cが、凹溝50におけるテーパ面状の外側周面50a,内側周面50cにより凹溝50の内方に向けて摺接案内され、図4(c)に示されるように、防食部材14は、背面19が奥端面5dと当接する設置位置に設置される。   4B, when the anticorrosion member 14 is further inserted into the inner side of the pipe, the tapered outer peripheral surface 21a and the inner peripheral surface 21c of the engagement convex portion 21 are formed in the concave groove 50. As shown in FIG. 4C, the back surface 19 of the anticorrosion member 14 has a back end surface 5d as guided in sliding contact toward the inside of the groove 50 by the tapered outer peripheral surface 50a and the inner peripheral surface 50c. It is installed at the installation position where it abuts.

図4(c)の状態において外側周面21a,端面21b,内側周面21cと外側周面50a,端面50b,内側周面50cとがそれぞれ確実に当接する。つまり、凹溝50内に係合凸部21が遊びなく嵌合するため、径方向及び管奥側に向かう管軸方向の防食部材14の移動が規制され、結果的に防食部材14が凹溝50に係合し、防食部材14の位置ずれが確実に防止される。   In the state of FIG. 4C, the outer peripheral surface 21a, the end surface 21b, the inner peripheral surface 21c and the outer peripheral surface 50a, the end surface 50b, and the inner peripheral surface 50c abut securely. That is, since the engaging convex part 21 fits in the concave groove 50 without play, the movement of the anticorrosive member 14 in the radial direction and the tube axis direction toward the inner side of the pipe is restricted, and as a result, the anticorrosive member 14 becomes concave. 50, the position of the anticorrosion member 14 is reliably prevented from being displaced.

また、係合凸部21が凹溝50に嵌合された状態、すなわち防食部材14が前記設置位置に設置された状態においては、背面19が奥端面5dと当接しているとともに、係合凸部21の外周面20が収容面20cと当接した状態が維持されている。この設置状態においては、奥端面5dと収容面5cとに生じている既存の段差を利用して係合部16が奥端面5d及び収容面5cに係合することになり、係合凸部21が凹溝50に係合するに加え、径方向及び管奥側に向かう管軸方向の防食部材14の位置ずれを確実に防止することができる。   Further, in a state where the engagement convex portion 21 is fitted in the concave groove 50, that is, in a state where the anticorrosion member 14 is installed at the installation position, the back surface 19 is in contact with the back end surface 5d, and the engagement projection The state where the outer peripheral surface 20 of the portion 21 is in contact with the accommodation surface 20c is maintained. In this installed state, the engaging portion 16 is engaged with the back end surface 5d and the housing surface 5c by using the existing step formed on the back end surface 5d and the housing surface 5c, and the engaging convex portion 21 is engaged. In addition to engaging with the concave groove 50, it is possible to reliably prevent displacement of the anticorrosion member 14 in the radial direction and in the tube axis direction toward the tube back side.

尚、本実施例では、防食部材14が凹溝50に嵌合された状態において、係合凸部21の端面21bと凹溝50の端面50bとが当接しているが、係合凸部21の端面21bを凹溝50の端面50bに当接させず間隙が形成されるようにしてもよい。   In this embodiment, the end surface 21b of the engaging convex portion 21 and the end surface 50b of the concave groove 50 are in contact with each other in a state where the anticorrosion member 14 is fitted in the concave groove 50. The end face 21b may not be brought into contact with the end face 50b of the recessed groove 50, and a gap may be formed.

そして、防食部材14を設置した後、エルボ管2の受口部5の開口端から受口部5内にシール部材8を挿入し、受口部5の凹部5aに嵌合部8aを嵌合させて装着する(図5(a)参照)。尚、受口部5内への防食部材14の装着作業若しくはシール部材8の装着作業は、エルボ管2の出荷段階において予め完了させる場合もあるし、管継手1の接続現場において実施する場合もある。   Then, after the anticorrosion member 14 is installed, the seal member 8 is inserted into the receiving portion 5 from the opening end of the receiving portion 5 of the elbow pipe 2, and the fitting portion 8 a is fitted into the concave portion 5 a of the receiving portion 5. (See FIG. 5A). In addition, the mounting operation of the anticorrosion member 14 or the mounting operation of the seal member 8 in the receiving portion 5 may be completed in advance at the shipping stage of the elbow pipe 2 or may be performed at the connection site of the pipe joint 1. is there.

次いで、エルボ管2の管端開口内に直管11の挿口部12が挿入されると、挿口部12の外周面12aが受口部5の内周面に嵌合されたシール部材8の嵌合部8aと摺接しつつ、受口部5に挿入され、バルブ部8cを挿口部12の外周面12aと受口部5の内周面との間隙内で圧縮する。これにより、受口部5の内周面と挿口部12の外周面12aとの間隙が密封され、受口部5の内周面と挿口部12の外周面12aとの間からの流体の漏出が防止される。   Next, when the insertion portion 12 of the straight tube 11 is inserted into the tube end opening of the elbow tube 2, the sealing member 8 in which the outer peripheral surface 12 a of the insertion portion 12 is fitted to the inner peripheral surface of the receiving portion 5. While being in sliding contact with the fitting portion 8 a, the valve portion 8 c is inserted into the receiving portion 5, and the valve portion 8 c is compressed in the gap between the outer peripheral surface 12 a of the inserting portion 12 and the inner peripheral surface of the receiving portion 5. Thereby, the gap between the inner peripheral surface of the receiving portion 5 and the outer peripheral surface 12a of the insertion portion 12 is sealed, and the fluid from between the inner peripheral surface of the receiving portion 5 and the outer peripheral surface 12a of the insertion portion 12 is sealed. Leakage is prevented.

さらに挿口部12が挿入され、挿口部12の先端が係合部16の先端に到達すると、該挿口部12の開口端部における外周面12aがガイド面16aに当接した後、該ガイド面16aに摺接案内されながら管奥側に向けて挿入される。そして、このガイド面16aは先端から当接面17aに向けて漸次縮径するテーパ面状に形成されていることで、挿口部12の軸心が受口部5の軸心に対してずれた状態で挿入されても、挿口部12の外周面12aがガイド面16aにより軸心に向けて摺接案内される。これにより、図5(a)に示されるように、管端面12cが膨出部17の当接面17aの頂部と当接した当接位置aにおいて、管端面12cの略全域がガイド面16aと内周当接面18aとの間における当接面17aと対向するように配置されるため、管端面12cが当接面17aと周方向に亘って確実に当接する。尚、係合部のガイド面は、防食部材の周方向に沿って形成されていればよく、本実施例のようにガイド面16aが防食部材14の全周に亘って形成されていてもよいし、あるいはガイド面が、防食部材の周方向の一部に、若しくは周方向に所定間隔に形成されていてもよい。   Further, when the insertion portion 12 is inserted and the distal end of the insertion portion 12 reaches the distal end of the engagement portion 16, the outer peripheral surface 12a at the opening end of the insertion portion 12 abuts on the guide surface 16a, It is inserted toward the inner side of the pipe while being guided in sliding contact with the guide surface 16a. And this guide surface 16a is formed in the taper surface shape gradually diameter-reduced toward the contact surface 17a from the front-end | tip, and the axial center of the insertion part 12 shift | deviates with respect to the axial center of the receiving part 5. Even if it is inserted in this state, the outer peripheral surface 12a of the insertion portion 12 is slidably guided toward the axis by the guide surface 16a. As a result, as shown in FIG. 5A, in the contact position a where the tube end surface 12c contacts the top of the contact surface 17a of the bulging portion 17, substantially the entire area of the tube end surface 12c is in contact with the guide surface 16a. Since it arrange | positions so that the contact surface 17a between inner peripheral contact surfaces 18a may be opposed, the pipe end surface 12c contact | abuts reliably with the contact surface 17a over the circumferential direction. In addition, the guide surface of an engaging part should just be formed along the circumferential direction of an anticorrosion member, and the guide surface 16a may be formed over the perimeter of the anticorrosion member 14 like a present Example. Alternatively, the guide surface may be formed on a part of the anticorrosion member in the circumferential direction or at a predetermined interval in the circumferential direction.

また、内周当接部18の内周当接面18aは、上記したように当接面17a側から内周当接面18aの先端に向けて漸次拡径するテーパ面状に形成され、内周当接部18の間口が広がっているため、管端面12cが内周当接部18の先端に当接することがなく挿口部12が挿入され、該管端面12cにより内周当接部18が押し潰されることがない。尚、当接位置aにおいて、膨出部17は未だ管端面12cにより押し潰されてはいない。   Further, as described above, the inner peripheral contact surface 18a of the inner peripheral contact portion 18 is formed in a tapered surface shape that gradually increases in diameter from the contact surface 17a side toward the tip of the inner peripheral contact surface 18a. Since the opening of the circumferential contact portion 18 is widened, the insertion end portion 12 is inserted without the tube end surface 12c contacting the tip of the inner circumferential contact portion 18, and the inner circumferential contact portion 18 is inserted by the tube end surface 12c. Will not be crushed. At the contact position a, the bulging portion 17 is not yet crushed by the pipe end surface 12c.

次いで、図5(a)に示される当接位置aから更に挿口部12が管奥側に挿入されると、防食部材14は、挿口部12の管端面12cと受口部5の奥端面5dとの間で管軸方向に挟圧された状態となり、管端面12cにより膨出部17が押圧されて押し潰され、つまり膨出部17の弾性変形が開始される。   Next, when the insertion portion 12 is further inserted into the tube back side from the contact position a shown in FIG. 5A, the anticorrosion member 14 is connected to the tube end surface 12 c of the insertion portion 12 and the depth of the receiving portion 5. The tube is pressed between the end surface 5d in the tube axis direction, and the bulging portion 17 is pressed and crushed by the tube end surface 12c, that is, elastic deformation of the bulging portion 17 is started.

係合凸部21、係合部16については、膨出部17の弾性変形が開始されても、係合凸部21は凹溝50に係合しており、係合部16は収容面5c及び奥端面5dに係合しているため、防食部材14の軸心が位置ずれすることなく防食部材14が押し潰される。   As for the engaging projections 21 and 16, even when the elastic deformation of the bulging portion 17 is started, the engaging projection 21 is engaged with the concave groove 50, and the engaging portion 16 is accommodated in the receiving surface 5 c. And since it engages with the back end surface 5d, the anticorrosion member 14 is crushed without the axial center of the anticorrosion member 14 being displaced.

そして、図5(b)に示されるように、膨出部17が完全に押し潰された位置、すなわち被覆開始位置bに管端面12cが到達すると、管端面12cにより押圧された膨出部17の当接面17aが管端面12cの略全域にわたり密着するため、該管端面12c略全域が当接面17aにより被覆される被覆状態となる。また、この被覆状態においても、係合凸部21及び係合部16の係合により、防食部材14を位置ずれすることなく管端面12cを当接面17aに確実に当接させて管端面12cが被覆される。   As shown in FIG. 5B, when the tube end surface 12c reaches the position where the bulging portion 17 is completely crushed, that is, the coating start position b, the bulging portion 17 pressed by the tube end surface 12c. Since the abutment surface 17a is in close contact with substantially the entire region of the tube end surface 12c, the substantially entire region of the tube end surface 12c is covered with the abutment surface 17a. Even in this covered state, the engagement of the engagement convex portion 21 and the engagement portion 16 ensures that the tube end surface 12c is brought into contact with the contact surface 17a without causing the anticorrosion member 14 to be displaced. Is coated.

また、図5(b)に示されるように、膨出部17が奥端面5d側に向けて押し潰されて弾性変形することで、防食部材14の内周側が管軸Cに向けて押し出され、この変形作用により内周当接部18が挿口部12の内周面12bに向けて移動して、内周当接面18aが挿口部12の内周面12bと当接する。   Further, as shown in FIG. 5B, the inner peripheral side of the anticorrosion member 14 is pushed out toward the tube axis C by the bulging portion 17 being crushed toward the back end surface 5d and elastically deforming. Due to this deformation action, the inner peripheral contact portion 18 moves toward the inner peripheral surface 12b of the insertion portion 12, and the inner peripheral contact surface 18a contacts the inner peripheral surface 12b of the insertion portion 12.

そして本実施例では、図6(a)に示されるように、挿口部12は、管端面12cが前記被覆開始位置bから更に被覆幅寸法L1分管奥側の挿入完了位置cまで受口部5に挿入された時点で挿入作業が終了されるようになっている。つまり、被覆開始位置bからさらに深く挿口部12を挿入し、防食部材14を強く押し潰すことにより、該防食部材14の弾性復帰力が高まり、当接面17aによる管端面12cの水密性が向上する。さらに、内周当接面18aが挿口部12の内周面12bに向けて強く押し付けられるため、内周当接面18aによる内周面12bの水密性が向上する。   In this embodiment, as shown in FIG. 6 (a), the insertion portion 12 has a receiving portion where the tube end surface 12c extends from the covering start position b to the insertion completion position c further to the covering width dimension L1. The insertion operation is completed at the time when the insertion is made in the line 5. That is, by inserting the insertion portion 12 further deeply from the coating start position b and strongly crushing the anticorrosion member 14, the elastic return force of the anticorrosion member 14 is increased, and the water tightness of the pipe end surface 12c by the contact surface 17a is increased. improves. Furthermore, since the inner peripheral contact surface 18a is strongly pressed toward the inner peripheral surface 12b of the insertion portion 12, the water tightness of the inner peripheral surface 12b by the inner peripheral contact surface 18a is improved.

尚、係合部16については、挿口部12の外周面12a及び受口部5の収容面5cとの間隙内で弾性変形することにより、その圧縮に応じて挿口部12の外周面12aと受口部5の収容面5cとの水密性が増加するとともに、挿口部12の軸心の受口部5の軸心に対する位置ずれが規制される。   In addition, about the engaging part 16, the outer peripheral surface 12a of the insertion part 12 according to the compression is carried out by elastically deforming in the clearance gap between the outer peripheral surface 12a of the insertion part 12, and the accommodating surface 5c of the receiving part 5. And the accommodating surface 5c of the receiving portion 5 are increased, and the positional deviation of the shaft center of the insertion portion 12 with respect to the shaft center of the receiving portion 5 is restricted.

また、上述したように、図6(a)に示されるように本実施例では、背面19が奥端面5dと当接する設置位置に防食部材14が設置された状態において係合凸部21の端面21bと凹溝50の端面50bとが当接しているが、端面21bを端面50bに当接しないように端面21bと端面50bとの間に間隙を設けた場合には、管端面12cにより弾性変形した防食部材14の一部の逃げ代として、前記間隙を利用でき、管端面12cにより防食部材14が押圧されても防食部材14の管軸方向の移動が規制され、防食部材14が該設置位置に設置された状態が維持される。   As described above, as shown in FIG. 6A, in this embodiment, the end surface of the engaging convex portion 21 in the state where the anticorrosion member 14 is installed at the installation position where the back surface 19 abuts the back end surface 5d. 21b and the end surface 50b of the concave groove 50 are in contact, but when a gap is provided between the end surface 21b and the end surface 50b so that the end surface 21b does not contact the end surface 50b, the tube end surface 12c is elastically deformed. The clearance can be used as a clearance for a part of the anticorrosion member 14, and even if the anticorrosion member 14 is pressed by the pipe end surface 12c, the movement of the anticorrosion member 14 in the tube axis direction is restricted, and the anticorrosion member 14 is in the installation position. The state where it is installed is maintained.

そして管端面12cが前記挿入完了位置cに到達した状態において、この状態を保持したまま、押し込みボルト9を円弧溝7の外側からねじ込み、固定つめ10を挿口部12の外周面12aに押し付け、押し込みボルト9をさらに螺入し、固定つめ10の尖鋭刃10aを管軸Cに向けて押圧して挿口部12の外周面12aに食い込ませ、受口部5と挿口部12とを接続する。これにより、受口部5からの挿口部12の抜脱が規制された規制状態となる。   Then, in the state where the tube end surface 12c has reached the insertion completion position c, the push bolt 9 is screwed from the outside of the arc groove 7 while maintaining this state, and the fixing claw 10 is pressed against the outer peripheral surface 12a of the insertion portion 12. The push-in bolt 9 is further screwed in, and the sharp blade 10a of the fixed claw 10 is pressed toward the tube axis C to bite into the outer peripheral surface 12a of the insertion portion 12, and the receiving portion 5 and the insertion portion 12 are connected. To do. Thereby, it will be in the control state in which removal of the insertion part 12 from the receiving part 5 was controlled.

つまり、受口部5に対する挿口部12の抜脱方向への移動を規制した状態で保持する固定つめ10の保持力は、防食部材14の弾性復帰力よりも大とされている。   That is, the holding force of the fixed pawl 10 that is held in a state in which the movement of the insertion portion 12 with respect to the receiving portion 5 in the removal direction is restricted is greater than the elastic return force of the anticorrosion member 14.

従って、管端面12cが、前記被覆開始位置bから前記挿入完了位置c間に位置している状態においては、常に膨出部17の当接面17aにより管端面12cが略全域にわたり密着されている被覆状態であるため、抜脱規制手段15により受口部5からの挿口部12の抜脱が規制されることで、防食部材14により管端面12cが被覆される被覆状態が維持される。   Therefore, in a state where the tube end surface 12c is located between the covering start position b and the insertion completion position c, the tube end surface 12c is always in close contact with the entire surface by the contact surface 17a of the bulging portion 17. Since it is in the covering state, the covering state in which the pipe end surface 12c is covered by the anticorrosive member 14 is maintained by restricting the removal of the insertion portion 12 from the receiving portion 5 by the removal restricting means 15.

一方、図6(a)に示す抜脱規制状態において、例えば地震等の不測の外力が生じて、挿口部12が受口部5に対して抜脱方向(図6(a)中左方向)に移動しようとする力が働いた場合、挿口部12の管端面12cは、図6(a)に示す挿入完了位置cから図6(b)に示す抜脱規制位置dまでの規制幅寸法L2分の移動が許容されている。   On the other hand, in the withdrawal restriction state shown in FIG. 6A, an unexpected external force such as an earthquake occurs, and the insertion portion 12 is removed from the receiving portion 5 in the removal direction (leftward in FIG. 6A). ), The tube end surface 12c of the insertion portion 12 has a restriction width from the insertion completion position c shown in FIG. 6A to the removal restriction position d shown in FIG. 6B. Movement of dimension L2 is allowed.

具体的には、固定つめ10は、円弧溝7内で押し込みボルト9の底面を支点として先端側が管軸方向に傾動可能とされており、固定つめ10の先端に形成された尖鋭刃10aが抜脱方向に移動許容幅寸法L3分移動することで、尖鋭刃10aが管軸Cに向かって挿口部12の外周面12aに食い込み、固定つめ10の管端開口側の側面が円弧溝7の内側面に当接することで、挿口部12の受口部5からの抜脱が規制されるようになっている。   Specifically, the fixed pawl 10 is tiltable in the tube axis direction with the bottom surface of the push-in bolt 9 as a fulcrum in the arc groove 7, and the sharp blade 10 a formed at the distal end of the fixed pawl 10 is pulled out. By moving in the disengagement direction by the movement allowable width dimension L3, the sharp blade 10a bites into the outer peripheral surface 12a of the insertion portion 12 toward the tube axis C, and the side surface on the tube end opening side of the fixed pawl 10 is the arc groove 7 By coming into contact with the inner surface, the removal of the insertion portion 12 from the receiving portion 5 is regulated.

このように、図6(b)に示されるように、固定つめ10の移動許容幅寸法L3分、受口部5と挿口部12との相対移動が許容されているため、管端面12cは、図6(a)に示す挿入完了位置cと図6(b)に示す抜脱規制位置dとの間で相対移動可能であり、移動許容幅寸法L3と挿入完了位置cと抜脱規制位置dとの間の規制幅寸法L2とは同寸である(L2=L3)。すなわち、本実施例においては、管端面12cが図6(a)に示す挿入完了位置cと図6(b)に示す抜脱規制位置dとの間に位置している状態において、抜脱規制手段15により受口部5から挿口部12の抜脱が規制されている抜脱規制状態とされている。   Thus, as shown in FIG. 6 (b), the relative movement between the receiving portion 5 and the insertion portion 12 is allowed by the allowable movement width dimension L3 of the fixed claw 10, so that the pipe end surface 12c is The relative movement is possible between the insertion completion position c shown in FIG. 6 (a) and the removal restriction position d shown in FIG. 6 (b), and the allowable movement width dimension L3, the insertion completion position c, and the removal restriction position. The regulation width dimension L2 between them is the same dimension (L2 = L3). That is, in the present embodiment, in the state where the tube end surface 12c is located between the insertion completion position c shown in FIG. 6A and the removal restriction position d shown in FIG. The means 15 is in a removal restriction state in which the removal of the insertion opening 12 from the receiving opening 5 is restricted.

また、管端面12cが図6(a)に示す挿入完了位置cに位置している状態において、管端面12cが抜脱方向に規制幅寸法L2分抜脱方向に移動して抜脱規制位置dに位置したとしても、この抜脱規制位置dは、防食部材14により管端面12cが略全域にわたり密着する被覆状態が維持される被覆開始位置bと挿入完了位置cとの間に位置するため、防食部材14の弾性復帰力により管端面12cに追従して防食部材14が管端面12cに密着した状態が維持される。   Further, in a state where the tube end surface 12c is located at the insertion completion position c shown in FIG. 6A, the tube end surface 12c moves in the removal direction by the regulation width dimension L2 in the removal direction, and the removal restriction position d. Even if it is located at this position, this withdrawal / removal restriction position d is located between the coating start position b and the insertion completion position c where the coating state where the tube end surface 12c adheres substantially over the entire area by the anticorrosion member 14 is maintained. The state where the anticorrosion member 14 is in close contact with the tube end surface 12c is maintained following the tube end surface 12c by the elastic restoring force of the anticorrosion member 14.

このように、相対移動が許容される規制幅寸法L2(L3)よりも、前記被覆状態が維持される被覆幅寸法L1が長寸となるように設定されていれば、挿口部12と受口部5とが抜脱規制状態において所定幅の相対移動が許容されるようになっている場合でも、防食部材14により管端面12cが略全域にわたり密着して被覆される被覆状態が維持されるため、本実施例にようにL1>L3の条件を満たすような管継手を適用することが好ましい。   Thus, if the covering width dimension L1 that maintains the covering state is set to be longer than the regulation width dimension L2 (L3) that allows relative movement, the insertion portion 12 and the receiving portion 12 are received. Even when the mouth portion 5 is allowed to move relative to the predetermined width in a state where it is prevented from being removed, the coating state in which the tube end surface 12c is closely adhered to the entire area by the anticorrosion member 14 is maintained. Therefore, it is preferable to apply a pipe joint that satisfies the condition of L1> L3 as in this embodiment.

以上に説明したように、本実施例の管継手1においては、防食部材14には、受口部5の凹溝50に係合する係合凸部21と、受口部5の奥端面5d及び収容面5cに係合する係合凸部と、が周方向に沿って形成されており、係合凸部21と係合部16がそれぞれ凹溝50、奥端面5d及び収容面5cに係合することで、防食部材14の受口部5に対する設置位置が決定されるようになっている。このようにすることで、背面19が奥端面5dと当接する設置位置に位置ずれなく防食部材14が設置されるため、受口部5に挿入した挿口部12の管端面12cを防食部材14に確実に当接させて被覆することができる。また、受口部5に防食部材14を設置して挿口部12を挿入するだけの簡単な作業で挿口部12の管端面12cの防食を図ることができ、従来のように挿口部を受口部に挿入する際に挿口部内に防食部材を挿通する等、防食部材が邪魔になることがないため、挿口部と受口部との接続作業が容易になる。   As described above, in the pipe joint 1 of the present embodiment, the anticorrosion member 14 includes the engagement convex portion 21 that engages with the concave groove 50 of the receiving portion 5 and the back end surface 5d of the receiving portion 5. And an engaging convex portion that engages with the receiving surface 5c are formed along the circumferential direction, and the engaging convex portion 21 and the engaging portion 16 are engaged with the concave groove 50, the back end surface 5d, and the receiving surface 5c, respectively. By combining, the installation position of the anticorrosion member 14 with respect to the receiving portion 5 is determined. By doing in this way, since the anticorrosion member 14 is installed in the installation position where the back surface 19 abuts on the back end surface 5d without being displaced, the pipe end surface 12c of the insertion portion 12 inserted into the receiving portion 5 is protected against the anticorrosion member 14. Can be reliably abutted on and coated. Further, the anticorrosion of the tube end surface 12c of the insertion portion 12 can be achieved by a simple operation of installing the anticorrosion member 14 in the receiving portion 5 and inserting the insertion portion 12, and the insertion portion as in the prior art. Since the anticorrosion member does not get in the way, for example, the anticorrosion member is inserted into the insertion portion when inserting the mouthpiece into the opening portion, the connection work between the insertion portion and the reception portion becomes easy.

また、本実施例では、係合凸部21は、防食部材14における奥端面5dとの対向する位置に設けられるとともに、奥端面5dには、係合凸部21を係合する凹溝50が形成されているため、奥端面5dに対する防食部材14の位置ずれを確実に防止できるため、挿口部12の管端面12cと防食部材14とが当接する際における位置ずれも効果的に防止できる。   Further, in the present embodiment, the engaging convex portion 21 is provided at a position facing the deep end surface 5d of the anticorrosion member 14, and a concave groove 50 for engaging the engaging convex portion 21 is formed on the deep end surface 5d. Since it is formed, the displacement of the anticorrosion member 14 with respect to the back end surface 5d can be reliably prevented, so that the displacement of the tube end surface 12c of the insertion portion 12 when the anticorrosion member 14 abuts can be effectively prevented.

また、本実施例では、係合部16は、奥端面5dよりも受口部5の開口端側の収容面5cに係合可能に延設されている。このようにすることで、防食部材14の背面19が奥端面5dと当接するとともに、係合部16が奥端面5dよりも受口部5の開口端側の収容面5cと当接して受口部5内に設置されるため、奥端面5dと収容面5cとに生じている既存の段差を利用して係合部16が係合することになり、防食部材14の位置ずれが確実に防止される。また、挿口部12を受口部5に挿入する際において、係合部16の内周面に沿って管端面12cが受口部5に挿入されるため、挿口部12が軸心からずれることがあっても、係合部16の内周面を利用して、軸心にむけて摺接案内され、管端面12cを防食部材14により確実に被覆することが可能となる。   Further, in the present embodiment, the engaging portion 16 extends so as to be engageable with the accommodating surface 5c on the opening end side of the receiving portion 5 with respect to the back end surface 5d. By doing in this way, while the back surface 19 of the anticorrosion member 14 contacts the back end surface 5d, the engaging portion 16 contacts the receiving surface 5c closer to the opening end of the receiving portion 5 than the back end surface 5d. Since it is installed in the portion 5, the engaging portion 16 is engaged by utilizing the existing step formed on the back end surface 5 d and the receiving surface 5 c, and the position shift of the anticorrosion member 14 is surely prevented. Is done. Further, when the insertion portion 12 is inserted into the receiving portion 5, the tube end surface 12 c is inserted into the receiving portion 5 along the inner peripheral surface of the engaging portion 16. Even if there is a deviation, the inner peripheral surface of the engaging portion 16 is used for sliding contact toward the axial center, and the pipe end surface 12c can be reliably covered with the anticorrosion member 14.

特に、本実施例の係合部16には、挿口部12のガイド面16aが当接面17aに向けて漸次縮径するテーパ面状に形成されている。これにより、挿口部12を受口部5に挿入する際において、挿口部12が軸心からずれることがあっても、挿口部12の外周面12aがガイド面16aにより軸心にむけて摺接案内されることにより管端面12cが当接面17aに対して位置ずれなく当接するため、管端面12cが当接面17aに当接した際に該当接面17aに対する管端面12cの位置ずれを補正するといった工程が不要であり、挿口部12を受口部5に挿入する工程だけで当接面17aが管端面12cを確実に被覆することができる。   In particular, in the engaging portion 16 of the present embodiment, the guide surface 16a of the insertion portion 12 is formed in a tapered surface shape that gradually decreases in diameter toward the contact surface 17a. Thereby, when inserting the insertion portion 12 into the receiving portion 5, even if the insertion portion 12 is displaced from the axial center, the outer peripheral surface 12a of the insertion portion 12 is directed toward the axial center by the guide surface 16a. Since the tube end surface 12c abuts against the contact surface 17a without being displaced by being guided by sliding contact, the position of the tube end surface 12c relative to the corresponding contact surface 17a when the tube end surface 12c contacts the contact surface 17a. The step of correcting the deviation is unnecessary, and the contact surface 17a can reliably cover the tube end surface 12c only by the step of inserting the insertion portion 12 into the receiving portion 5.

また、本実施例では、抜脱規制手段15により受口部5からの挿口部12の抜脱が規制され、この受口部5からの挿口部12の抜脱が規制されている状態において、防食部材14は弾性変形した状態で管端面12cを被覆しており、その弾性復帰力により管端面12cを押圧するため、防食部材14により管端面12cのシール性を常に維持することができる。また、不測の外力が生じた場合、受口部5からの挿口部12の抜脱が規制されている状態において、挿口部12が受口部5に対して若干移動しても、管端面12cは、弾性復帰力により管端面12cに追従して密着する防食部材14により、常にシールされる。   Further, in this embodiment, the removal restricting means 15 regulates the removal of the insertion portion 12 from the receiving portion 5, and in the state where the removal of the insertion portion 12 from the receiving portion 5 is restricted, The anticorrosion member 14 covers the tube end surface 12c in an elastically deformed state, and the tube end surface 12c is pressed by its elastic restoring force. Therefore, the sealability of the tube end surface 12c can always be maintained by the anticorrosion member 14. In addition, when an unexpected external force is generated, the tube end surface can be moved even if the insertion portion 12 moves slightly relative to the reception portion 5 in a state where the removal of the insertion portion 12 from the reception portion 5 is restricted. 12c is always sealed by the anticorrosion member 14 that closely follows the tube end surface 12c by elastic return force.

また、本実施例では、防食部材14における挿口部12の管端面12cとの当接面17aは、挿口部12側に向けて膨出しているため、管端面12cにより防食部材14が潰れやすくなり、挿口部12の受口部5への挿入が容易になるばかりか、管端面12cが当接面17aを押圧する際に、管端面12cと当接面17aとの間の空気が外に押し出されていくため、管端面12cと当接面17aとの密着性の低下が防止される。   In this embodiment, since the contact surface 17a of the anticorrosion member 14 with the tube end surface 12c of the insertion portion 12 bulges toward the insertion portion 12 side, the anticorrosion member 14 is crushed by the tube end surface 12c. Not only is the insertion of the insertion portion 12 into the receiving portion 5 easier, but when the tube end surface 12c presses the contact surface 17a, the air between the tube end surface 12c and the contact surface 17a Since it is pushed out, deterioration of the adhesion between the tube end surface 12c and the contact surface 17a is prevented.

また、本実施例では、防食部材14には、挿口部12の管端面12cとの当接面17aおける内周側端部から連続して挿口部12側に向けて延びる内周当接面18aが周方向に沿って形成されており、内周当接面18aは、防食部材14が管端面12cを被覆している状態において挿口部12の内周面12bに密着している。すなわち、膨出部17が管端面12cにより弾性変形することで、内周当接部18が挿口部12の内周面12bに向けて移動して、内周当接面18aが挿口部12の内周面12bと当接するため、管端面12cが被覆されるだけでなく、挿口部12の内周面12bも被覆され、管端面12cと当接面17aとの間への流体の進入をより確実に阻止できる。   Further, in the present embodiment, the anticorrosion member 14 has an inner peripheral contact that continuously extends from the inner peripheral end of the contact surface 17a with the pipe end surface 12c of the insertion portion 12 toward the insertion portion 12 side. The surface 18a is formed along the circumferential direction, and the inner peripheral contact surface 18a is in close contact with the inner peripheral surface 12b of the insertion portion 12 in a state where the anticorrosion member 14 covers the pipe end surface 12c. That is, the bulging portion 17 is elastically deformed by the tube end surface 12c, whereby the inner peripheral contact portion 18 moves toward the inner peripheral surface 12b of the insertion portion 12, and the inner peripheral contact surface 18a becomes the insertion portion. 12 is in contact with the inner peripheral surface 12b of the tube 12, so that the tube end surface 12c is not only covered, but the inner peripheral surface 12b of the insertion portion 12 is also covered, so that the fluid between the tube end surface 12c and the contact surface 17a is covered. It is possible to prevent entry more reliably.

また、本実施例では、内周当接面18aは、内周当接面18aの先端に向けて挿口部12の内周面12bに対し漸次離間するテーパ面状に形成されており、防食部材14が受口部5に挿入された挿口部12の管端面12cと受口部5の奥端面5dとの間で押圧されて弾性変形することにより、挿口部12の内周面12bに当接するように構成されているため、挿口部12が受口部5に挿入される際、間口が広がっているため、挿入された管端面12cにより内周当接部18が押し潰されることなく挿口部12を受口部5に挿入しやすくなるとともに、管端面12cの押圧による弾性変形によって挿口部12の内周面12bに当接されるため、内周当接面18aを挿口部12の内周面12bに対して押圧するための部材等を別途設けることなく、防食部材14の弾性変形を利用するだけで内周当接面18aにより挿口部12の内周面12bを確実に被覆することができる。   Further, in this embodiment, the inner peripheral contact surface 18a is formed in a tapered surface shape that gradually separates from the inner peripheral surface 12b of the insertion portion 12 toward the tip of the inner peripheral contact surface 18a. The member 14 is pressed and elastically deformed between the tube end surface 12c of the insertion portion 12 inserted into the reception portion 5 and the back end surface 5d of the reception portion 5, whereby the inner peripheral surface 12b of the insertion portion 12 is obtained. Therefore, when the insertion portion 12 is inserted into the receiving portion 5, the opening is widened, so that the inner peripheral contact portion 18 is crushed by the inserted tube end surface 12 c. The insertion portion 12 can be easily inserted into the receiving portion 5 without any contact, and the inner peripheral abutment surface 18a is abutted against the inner peripheral surface 12b of the insertion portion 12 by elastic deformation caused by pressing of the tube end surface 12c. Without providing a member or the like for pressing against the inner peripheral surface 12b of the insertion portion 12 By the inner peripheral contact surface 18a only by utilizing elastic deformation of the corrosion protection member 14 an inner circumferential surface 12b of the inserting portion 12 can be reliably covered.

また、本実施例では、挿口部12を挿入する前に防食部材14を受口部5内に挿入し、係合凸部21を凹溝50内に係合して背面19が奥端面5dに当接する設置位置に設置した後、つまり係合凸部21全体を凹溝50内に嵌合させた状態で挿口部12を挿入して防食部材14を押圧するようにしていたが、凹溝50が管軸方向に向かって開口しているとともに、係合凸部21が管軸方向に形成されているため、例えば係合凸部21の少なくとも一部が凹溝50内に嵌合されていれば、防食部材14を押し込んでも、背面19が奥端面5dに当接する設置位置に設置することができる。また、係合凸部21の外側周面21a,内側周面21cと、凹溝50の外側周面50a,内側周面50cとは、それぞれ管奥側に向けて縮径するテーパ面状に形成されているため、防食部材14を押し込んでも、このテーパ面を利用して係合凸部21と凹溝50とにより軸心方向にガイドされた状態で防食部材14が位置ずれなく移動されるため、背面19が奥端面5dに当接する設置位置に確実に防食部材14を設置することができる。   Further, in this embodiment, the anticorrosion member 14 is inserted into the receiving portion 5 before the insertion portion 12 is inserted, the engagement convex portion 21 is engaged in the concave groove 50, and the back surface 19 is the back end surface 5d. The insertion port 12 is inserted and the anticorrosion member 14 is pressed in the state where the insertion projection 12 is fitted in the concave groove 50 after being installed at the installation position in contact with the concave portion 50. Since the groove 50 is open toward the tube axis direction and the engaging convex portion 21 is formed in the tube axis direction, for example, at least a part of the engaging convex portion 21 is fitted into the concave groove 50. If so, even if the anticorrosion member 14 is pushed in, it can be installed at the installation position where the back surface 19 abuts against the back end surface 5d. Further, the outer peripheral surface 21a and the inner peripheral surface 21c of the engaging convex portion 21 and the outer peripheral surface 50a and the inner peripheral surface 50c of the concave groove 50 are each formed in a tapered surface shape that is reduced in diameter toward the back side of the tube. Therefore, even if the anticorrosion member 14 is pushed in, the anticorrosion member 14 is moved without displacement while being guided in the axial direction by the engagement convex portion 21 and the concave groove 50 using this tapered surface. The anticorrosion member 14 can be reliably installed at the installation position where the back surface 19 abuts against the back end surface 5d.

また、本実施例では、防食部材14の係合部16の先端は、図5(a)に示されるように、内周当接部18の先端よりも挿口部12側に向けて突出している方が好ましい。このようにすることで、挿口部12が受口部5に挿入される際、挿口部12の外周面12aが内周当接部18の先端よりも先にガイド面16aにより摺接案内されて位置ずれが補正されるため、管端面12cにより内周当接部18を押し潰すことなく、挿口部12を受口部5に挿入することができる。   Further, in the present embodiment, the tip of the engaging portion 16 of the anticorrosion member 14 protrudes toward the insertion portion 12 rather than the tip of the inner peripheral abutting portion 18 as shown in FIG. Is preferred. By doing so, when the insertion portion 12 is inserted into the receiving portion 5, the outer peripheral surface 12 a of the insertion portion 12 is slidably guided by the guide surface 16 a before the tip of the inner peripheral contact portion 18. Since the positional deviation is corrected, the insertion portion 12 can be inserted into the receiving portion 5 without crushing the inner peripheral contact portion 18 with the tube end surface 12c.

また、本実施例では、内周当接部18は、先端に向けて漸次肉薄となるように形成されているため、膨出部17が管端面12c押圧され弾性変形作用により挿口部12の内周面12bに向けて変形しやすくなるばかりか、内周面12bに密接した状態において、挿口部12から受口部5方向へ移動する流体による抵抗がかかりにくくなるので、内周当接部18の先端が流体により捲れにくくなる。   Further, in this embodiment, the inner peripheral abutting portion 18 is formed so as to become gradually thinner toward the tip, so that the bulging portion 17 is pressed against the tube end surface 12c and elastically deformed so that Not only is it easy to deform toward the inner peripheral surface 12b, but resistance to the fluid moving from the insertion portion 12 toward the receiving portion 5 is less likely to occur when in close contact with the inner peripheral surface 12b. The tip of the portion 18 is less likely to be swollen by the fluid.

次に、実施例2に係る管継手につき図面に基づいて説明すると、図7(a)は、実施例2の防食部材を示す正面図であり、(b)は、防食部材を示す右側面図であり、(c)は防食部材を示す左側面図であり、(d)は、図7(c)のB−B断面図である。図8は、防食部材が受口部に未だ装着されていない状態を示す拡大断面図である。図9は、防食部材が受口部に挿入されている状態を示す拡大断面図である。図10は、防食部材が設置位置に装着された状態を示す拡大断面図である。図11は、管継手が構成された状態を示す断面図である。   Next, the pipe joint according to the second embodiment will be described with reference to the drawings. FIG. 7A is a front view showing the anticorrosion member of the second embodiment, and FIG. 7B is a right side view showing the anticorrosion member. (C) is a left side view showing the anticorrosion member, and (d) is a BB sectional view of FIG. 7 (c). FIG. 8 is an enlarged cross-sectional view illustrating a state in which the anticorrosion member is not yet attached to the receiving portion. FIG. 9 is an enlarged cross-sectional view showing a state where the anticorrosion member is inserted into the receiving portion. FIG. 10 is an enlarged cross-sectional view showing a state in which the anticorrosion member is mounted at the installation position. FIG. 11 is a cross-sectional view illustrating a state in which the pipe joint is configured.

実施例2に係る管継手は、防食部材の形状及び受口部の形状が一部異なっているだけで、他の構成は実施例1で示した管継手1の形態とほぼ同様であるため、同様の構成部位には同一の符号を付すことにより、ここでの詳細な説明は省略することとする。   The pipe joint according to the second embodiment is substantially the same as the form of the pipe joint 1 shown in the first embodiment, except that the shape of the anticorrosion member and the shape of the receiving portion are only partially different. The same components are denoted by the same reference numerals, and detailed description thereof is omitted here.

図8、図11に示されるように、実施例2における管継手1を構成する受口部5は、奥端面5dに実施例1の被係合部としての凹溝50等の加工が施されていない既存の受口部であり、収容面5cと奥端面5dとで段差が生じており、また内周面5gと奥端面5dとで段差が生じている。   As shown in FIGS. 8 and 11, the receiving portion 5 that constitutes the pipe joint 1 in the second embodiment is processed such that the groove 50 or the like as the engaged portion in the first embodiment is formed on the back end surface 5 d. There is a gap between the receiving surface 5c and the back end surface 5d, and there is a step between the inner peripheral surface 5g and the back end surface 5d.

図7(a)〜(d)に示されるように、実施例2の防食部材24は、環状に形成された弾性を有するゴム体から形成されており、管端面12cに対向する位置には、管端面12cとほぼ平行をなす平坦状の当接面27が形成されている(図10参照。)。   As shown in FIGS. 7A to 7D, the anticorrosion member 24 of Example 2 is formed from a rubber body having elasticity formed in an annular shape, and at a position facing the pipe end surface 12c, A flat contact surface 27 that is substantially parallel to the tube end surface 12c is formed (see FIG. 10).

また図7(a)〜(d)、図8〜図10に示されるように、防食部材24の背面29側には、防食部材24を位置決めするための支持片25dとフィン25aとからなる係合突設部25が環状に管奥側に向かって形成されており、この係合突設部25は、防食部材24が受口部5に設置された状態において、奥端面5dと連続し、管奥側に向かって一定の内径寸法Rを有して形成された内周面5gと係合されるようになっている。   Further, as shown in FIGS. 7A to 7D and FIGS. 8 to 10, the back surface 29 side of the anticorrosion member 24 includes a support piece 25 d and a fin 25 a for positioning the anticorrosion member 24. The joint projecting portion 25 is formed in an annular shape toward the inner side of the pipe, and the engagement projecting portion 25 is continuous with the rear end surface 5d in a state where the anticorrosion member 24 is installed in the receiving port portion 5, It is adapted to be engaged with an inner peripheral surface 5g formed with a constant inner diameter R toward the inner side of the tube.

詳しくは、防食部材24の背面29の内周側には、防食部材24の内周面28に連続するとともに、奥端面5d側に向かって延設される、すなわち防食部材24が受口部5に設置された状態において奥端面5dよりも管奥側に延設されている支持片25dが周方向に沿って形成されている(図11参照。)。またこの支持片25dには、外径寸法Tを有する周面25bが外周面として形成されており、この周面25bの外径寸法Tは、防食部材24を受口部5に設置する際において内周面5gに挿入しやすいように、内径寸法Rより小径とされている(T<R)。   Specifically, the inner surface of the back surface 29 of the anticorrosion member 24 is continuous with the inner peripheral surface 28 of the anticorrosion member 24 and extends toward the back end surface 5d side, that is, the anticorrosion member 24 is the receiving portion 5. A support piece 25d extending from the back end surface 5d to the back side of the pipe in the state of being installed in the pipe is formed along the circumferential direction (see FIG. 11). In addition, a peripheral surface 25b having an outer diameter dimension T is formed on the support piece 25d as an outer peripheral surface. The outer diameter dimension T of the peripheral surface 25b is determined when the anticorrosion member 24 is installed in the receiving portion 5. The inner diameter R is smaller than the inner diameter R so that it can be easily inserted into the inner peripheral surface 5g (T <R).

さらに、この周面25bから径方向に向かって突設されたフィン25aが周方向に沿って複数形成されている(本実施例では所定間隔おきに3個)。また、このフィン25aには、外径寸法Sを有する周面25cが外周面として形成されており、防食部材24が受口部5に設置された状態において、このフィン25aが内周面5gと係合されるようになっている。また後述するように、この係合状態において、フィン25aが弾性変形し、内周面5gと当接することで防食部材24の位置ずれを防止するために周面25cの外径寸法Sが、内径寸法Rより大径となっている(S>R)。   Further, a plurality of fins 25a projecting from the circumferential surface 25b in the radial direction are formed along the circumferential direction (three in this embodiment at predetermined intervals). Moreover, the peripheral surface 25c which has the outer diameter dimension S is formed in this fin 25a as an outer peripheral surface, and in the state in which the anticorrosion member 24 was installed in the receiving part 5, this fin 25a and the inner peripheral surface 5g It is designed to be engaged. As will be described later, in this engaged state, the fin 25a is elastically deformed, and the outer diameter S of the peripheral surface 25c is set to the inner diameter in order to prevent displacement of the anticorrosion member 24 by contacting the inner peripheral surface 5g. The diameter is larger than the dimension R (S> R).

また、防食部材24の係合突設部25の外周側には、防食部材24が受口部5に設置された状態において奥端面5dよりも受口部5の開口端側に延設された係合部26が周方向に沿って環状に形成されており、後述するように、この係合部26は、受口部5の収容面5cに係合するようになっている。さらに、係合部26の当接面27側の周面、すなわち係合部26の内周面は、当接面27の外周端縁部から連設され、挿口部12側に向けて延びるガイド面26aとされており、このガイド面26aは、挿口部12が受口部5に挿入される際において、挿口部12の外周面12aを軸心に向けてガイドするために、先端から当接面27に向けて漸次縮径するテーパ面状に形成されている。   In addition, on the outer peripheral side of the engagement projecting portion 25 of the anticorrosion member 24, the anticorrosion member 24 is extended from the back end surface 5 d to the opening end side of the receiving portion 5 in a state where the anticorrosive member 24 is installed in the receiving portion 5. The engaging portion 26 is formed in an annular shape along the circumferential direction. As will be described later, the engaging portion 26 is engaged with the receiving surface 5 c of the receiving portion 5. Further, the peripheral surface of the engagement portion 26 on the contact surface 27 side, that is, the inner peripheral surface of the engagement portion 26 is continuously provided from the outer peripheral edge of the contact surface 27 and extends toward the insertion portion 12 side. The guide surface 26a is a distal end for guiding the outer peripheral surface 12a of the insertion portion 12 toward the axial center when the insertion portion 12 is inserted into the receiving portion 5. The taper is formed in a tapered shape that gradually decreases in diameter from the contact surface 27 toward the contact surface 27.

次に、実施例2の管継手1の接続について説明する。尚、実施例2の管継手1の接続工程において、実施例1の管継手1の接続工程と同一工程で重複する工程を省略して説明する。   Next, connection of the pipe joint 1 of Example 2 will be described. In addition, in the connection process of the pipe joint 1 of Example 2, the process which overlaps with the same process as the connection process of the pipe joint 1 of Example 1 is abbreviate | omitted and demonstrated.

先ず、エルボ管2の管端開口から受口部5内に防食部材を挿入し(図8参照。)、さらに受口部5の管奥側に防食部材24を挿入すると、防食部材24の係合部26の管奥側の先端が受口部5の収容面5cと当接し、さらに防食部材24を管奥側に挿入することにより、係合部26の外周面30が受口部5の収容面5cと当接し、防食部材24の軸心が受口部5の軸心と合わせて防食部材24が挿入されることになる。   First, when the anticorrosion member is inserted into the receiving port 5 from the tube end opening of the elbow pipe 2 (see FIG. 8), and the anticorrosion member 24 is further inserted into the tube inner side of the receiving port 5, the engagement of the anticorrosion member 24 is achieved. The distal end of the joint portion 26 on the back side of the tube abuts on the receiving surface 5 c of the receiving portion 5, and the anticorrosion member 24 is inserted on the back side of the tube, whereby the outer peripheral surface 30 of the engaging portion 26 is The anticorrosion member 24 is inserted with the housing surface 5 c in contact with the axis of the anticorrosion member 24 aligned with the axis of the receiving portion 5.

さらに防食部材24が管奥側に挿入されると、支持片25dの管奥側の先端が受口部5の内周面5g内に挿入される。尚、支持片25dの周面25bの外径寸法Tが内周面5gの内径寸法Rより小径であるため、支持片25dが内周面5g内に挿入されやすい。   Further, when the anticorrosion member 24 is inserted into the inner side of the pipe, the distal end of the support piece 25d on the inner side of the pipe is inserted into the inner peripheral surface 5g of the receiving portion 5. Since the outer diameter T of the peripheral surface 25b of the support piece 25d is smaller than the inner diameter R of the inner peripheral surface 5g, the support piece 25d is easily inserted into the inner peripheral surface 5g.

さらに受口部5の管奥側に防食部材24を挿入すると、図9に示されるように、フィン25aのうち管奥側のフィン25aが内周面5gと当接し、弾性変形して受口部5の内周面5gに当接した状態を維持して係合突設部25が挿入される。   Further, when the anticorrosion member 24 is inserted into the tube back side of the receiving portion 5, as shown in FIG. 9, the fin 25a on the tube back side of the fin 25a comes into contact with the inner peripheral surface 5g and is elastically deformed to receive the receiving port. The engagement projecting portion 25 is inserted while maintaining a state in contact with the inner peripheral surface 5g of the portion 5.

次いで、防食部材24をさらに管奥側に挿入することにより、フィン25aが管奥側から順に当接し、弾性変形して係合突設部25が内周面5g内に挿入され、やがて全てのフィン25aが弾性変形して内周面5gと当接した状態になる。この当接状態においてフィン25aの周面25cの外径寸法Sが、内周面5gの内径寸法Rより大径であるため、フィン25aの弾性復帰力により内周面5gが押圧される。   Next, the anticorrosion member 24 is further inserted into the inner side of the pipe, so that the fins 25a abut in order from the inner side of the pipe, are elastically deformed, and the engaging projecting portion 25 is inserted into the inner peripheral surface 5g. The fin 25a is elastically deformed and comes into contact with the inner peripheral surface 5g. Since the outer diameter S of the peripheral surface 25c of the fin 25a is larger than the inner diameter R of the inner peripheral surface 5g in this contact state, the inner peripheral surface 5g is pressed by the elastic return force of the fin 25a.

そして、図10に示されるように、背面19が奥端面5dと当接する設置位置まで防食部材24を挿入する。   And as FIG. 10 shows, the anticorrosion member 24 is inserted to the installation position where the back surface 19 contact | abuts the back end surface 5d.

これにより、フィン25aの弾性復帰力により内周面5gが押圧されるため、この押圧力によりフィン25aが内周面5gに係合し、径方向の防食部材24の移動が規制され、防食部材24が受口部5内に位置ずれなく設置されることができる。   Thereby, since the inner peripheral surface 5g is pressed by the elastic restoring force of the fin 25a, the fin 25a is engaged with the inner peripheral surface 5g by this pressing force, and the movement of the radial anticorrosion member 24 is restricted, and the anticorrosion member. 24 can be installed in the receiving part 5 without positional deviation.

また、背面19が奥端面5dと当接する設置位置に防食部材24が設置された状態において背面29がフィン25aと当接するとともに、フィン25aが内周面5gと当接するため、奥端面5dと内周面5gとに生じている既存の段差を利用して係合部26が奥端面5dと収容面5cと係合することになり、フィン25aの弾性復帰力に加え、径方向及び管奥側に向かう管軸方向の防食部材24の位置ずれを確実に防止することができる。   In addition, in the state where the anticorrosion member 24 is installed at the installation position where the back surface 19 contacts the back end surface 5d, the back surface 29 contacts the fin 25a and the fin 25a contacts the inner peripheral surface 5g. The engaging portion 26 is engaged with the back end surface 5d and the receiving surface 5c by using the existing step formed on the peripheral surface 5g, and in addition to the elastic return force of the fin 25a, the radial direction and the tube back side The position shift of the anticorrosion member 24 in the direction of the tube axis toward the tube can be reliably prevented.

また、係合部26については、背面19が奥端面5dと当接する設置位置に防食部材24が設置された状態において背面29が奥端面5dと当接するとともに、係合部26が収容面5cと当接するため、奥端面5dと収容面5cとに生じている既存の段差を利用して係合部26が奥端面5dと収容面5cとに係合することになり、径方向及び管奥側に向かう管軸方向の防食部材24の位置ずれ防止が向上する。   As for the engaging portion 26, the back surface 29 contacts the back end surface 5 d in a state where the anticorrosion member 24 is installed at the installation position where the back surface 19 contacts the back end surface 5 d, and the engaging portion 26 contacts the receiving surface 5 c. In order to abut, the engaging portion 26 is engaged with the back end surface 5d and the receiving surface 5c using the existing step formed on the back end surface 5d and the receiving surface 5c. The position shift prevention of the anticorrosion member 24 in the direction of the tube axis toward the tube improves.

次いで、防食部材24を受口部5内に設置した後、シール部材8を挿入して配置し挿口部12を受口部5内に挿入する。   Next, after the anticorrosion member 24 is installed in the receiving portion 5, the seal member 8 is inserted and arranged, and the insertion portion 12 is inserted into the receiving portion 5.

そして、挿口部12の先端が係合部26の先端に到達すると、該挿口部12の開口端部外周面がガイド面26aに当接した後、該ガイド面26aに摺接案内されながら管奥側に向けて挿入され、管端面12cが当接面27と当接した被覆開始位置e(図11参照。)において、該管端面12cが当接面27に確実に当接する。   When the distal end of the insertion portion 12 reaches the distal end of the engaging portion 26, the outer peripheral surface of the opening end portion of the insertion portion 12 contacts the guide surface 26a, and is slidably guided to the guide surface 26a. At the coating start position e (see FIG. 11) where the tube end surface 12c is inserted toward the inner side of the tube and the tube end surface 12c contacts the contact surface 27, the tube end surface 12c reliably contacts the contact surface 27.

ここで、当接面27は平坦状に形成されているため、管端面12cが当接面27に当接した段階で管端面12cが略全域にわたり当接面27により被覆される。   Here, since the contact surface 27 is formed in a flat shape, the tube end surface 12c is covered by the contact surface 27 over substantially the entire area when the tube end surface 12c contacts the contact surface 27.

次いで、被覆開始位置eから更に挿口部12が管奥側に挿入されると、防食部材24は、管端面12cと受口部5の奥端面5dとの間で管軸方向に挟圧された状態となり、管端面12cにより当接面27が押圧されて防食部材24の弾性変形が開始され、これにより主に防食部材24の内周面28側が管軸Cに向けて押し出される。このように防食部材24が押し潰されて弾性変形が開始された状態において、管端面12cに対して防食部材24の弾性復帰力が作用することになるため、管端面12cが当接面27により被覆される被覆状態となる。   Next, when the insertion portion 12 is further inserted into the tube back side from the coating start position e, the anticorrosion member 24 is sandwiched between the tube end surface 12c and the back end surface 5d of the receiving portion 5 in the tube axis direction. The contact surface 27 is pressed by the pipe end surface 12c, and the anticorrosion member 24 starts to be elastically deformed, whereby the inner peripheral surface 28 side of the anticorrosion member 24 is mainly pushed out toward the tube axis C. In this state where the anticorrosion member 24 is crushed and elastic deformation is started, the elastic return force of the anticorrosion member 24 acts on the tube end surface 12 c, so that the tube end surface 12 c is brought into contact with the contact surface 27. It becomes the covering state to be coated.

そして、本実施例においては、図11に示されるように、挿口部12は、管端面12cが前記被覆開始位置eから更に被覆幅寸法L4分僅かに管奥側の挿入完了位置fまで受口部5に挿入された時点で挿入作業が終了される。つまり、被覆開始位置eからL4分挿入方向に挿口部12を挿入し、防食部材24を押し潰すことにより、当接面27による管端面12cの水密性が維持される。さらに、防食部材24の内周面28側が管軸C方向に押し出されて膨出することで、挿口部12の内周面12bにおける当接面27の近傍位置が、膨出した防食部材24の内周面28側により若干被覆され、水密状態になる。   In the present embodiment, as shown in FIG. 11, the insertion opening 12 receives the tube end surface 12c from the coating start position e to the insertion completion position f slightly on the back side of the pipe by a coating width dimension L4. The insertion operation is completed when the insertion is made in the mouth portion 5. That is, by inserting the insertion portion 12 in the insertion direction L4 from the coating start position e and crushing the anticorrosion member 24, the water tightness of the tube end surface 12c by the contact surface 27 is maintained. Furthermore, when the inner peripheral surface 28 side of the anticorrosion member 24 is pushed out in the direction of the tube axis C and bulges, the position near the contact surface 27 on the inner peripheral surface 12b of the insertion portion 12 bulges out. Is slightly covered with the inner peripheral surface 28 side, and is in a watertight state.

そして、管端面12cが前記挿入完了位置fに到達した状態において、実施例1と同様に抜脱規制手段15により挿口部12と受口部5とを接続する。これにより、受口部5からの挿口部12の抜脱が規制された規制状態となり、管端面12cが、前記被覆開始位置eから前記挿入完了位置f間に位置している状態においては、当接面27により管端面12cが略全域にわたり密着されている被覆状態であるため、抜脱規制手段15により受口部5からの挿口部12の抜脱が規制されることで、防食部材24により管端面12cが被覆される被覆状態が維持される。   Then, in a state where the tube end surface 12c has reached the insertion completion position f, the insertion portion 12 and the receiving portion 5 are connected by the removal restricting means 15 as in the first embodiment. As a result, the insertion state of the insertion portion 12 from the reception portion 5 is restricted, and in a state where the pipe end surface 12c is located between the covering start position e and the insertion completion position f, Since the tube end surface 12c is in close contact with the entire surface by the contact surface 27, the removal preventing means 15 regulates the removal of the insertion portion 12 from the receiving portion 5, so that the anticorrosion member 24 The covering state in which the tube end surface 12c is covered is maintained.

以上に説明したように、実施例2における管継手1においては、奥端面5dよりも管奥側の内周面5gに係合可能に延設されている。このようにすることで、背面19が奥端面5dと当接するとともに、係合突設部25が奥端面5dよりも管奥側の受口部5の内周面5gと当接して受口部5内に設置されるため、係合突設部25が、奥端面5dと受口部5の内周面5gとに生じている既存の段差を利用して係合部が係合することになり、受口部5の内周面に特段の加工等を施すことなく、防食部材24の位置ずれが確実に防止される。   As described above, in the pipe joint 1 according to the second embodiment, the pipe joint 1 extends so as to be able to engage with the inner peripheral surface 5g on the pipe back side with respect to the back end face 5d. By doing in this way, while the back surface 19 is contact | abutted with the back end surface 5d, the engagement protrusion part 25 is contact | abutted with the inner peripheral surface 5g of the receiving part 5 of the pipe | tube back side rather than the back end surface 5d, and a receiving part Since the engagement projecting portion 25 is installed in the inner surface 5, the engagement portion engages with the existing step formed on the inner end surface 5 g of the rear end surface 5 d and the receiving port portion 5. Thus, the position shift of the anticorrosion member 24 is reliably prevented without performing special processing or the like on the inner peripheral surface of the receiving portion 5.

また、実施例2では、防食部材24の当接面27は平坦状に形成されているため、挿口部12が受口部5に挿入される際、挿口部12の管端面12cが当接した後、管端面12cを挿入方向に僅かに挿入するだけで、管端面12cに対して防食部材24の弾性復帰力が作用して、管端面12c略全域が当接面27により被覆されるため、管端面12cが防食部材24に当接した位置から挿入完了位置fまでの寸法を小寸にすることができ、挿口部12の挿入が容易になる。   In Example 2, since the contact surface 27 of the anticorrosion member 24 is formed in a flat shape, when the insertion portion 12 is inserted into the receiving portion 5, the tube end surface 12 c of the insertion portion 12 is contacted. After the contact, just inserting the tube end surface 12c slightly in the insertion direction causes the elastic return force of the anticorrosion member 24 to act on the tube end surface 12c, so that the substantially entire area of the tube end surface 12c is covered by the contact surface 27. Therefore, the dimension from the position where the pipe end surface 12c contacts the anticorrosion member 24 to the insertion completion position f can be reduced, and the insertion portion 12 can be easily inserted.

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.

また、前記実施例1では、係合凸部21は防食部材14の背面19に突設されて形成されているが、これに限らず、例えば、背面19に受口部5の管奥側に開口した係合凹部を設けるとともに、奥端面5dに該係合凹部により嵌合される凸状部が受口部5の開口端側に向かって形成され、防食部材14が設置された状態において前記係合凹部が該凸状部に嵌合されることにより防食部材が位置決めされるものでもよい。このように係合部が受口部5の内周面に係合するものであれば、係合部は、凸状、凹状のいずれの形状に形成されてもよい。   Moreover, in the said Example 1, although the engagement convex part 21 protrudes and is formed in the back surface 19 of the anticorrosion member 14, it is not restricted to this, For example, it is in the back surface 19 in the pipe | tube back side of the receiving part 5. While providing the opening engagement recessed part, the convex part fitted by this engagement recessed part is formed in the back end surface 5d toward the opening end side of the receiving part 5, and the said anticorrosion member 14 is installed in the state. The anticorrosion member may be positioned by fitting the engaging concave portion into the convex portion. As long as the engaging portion engages with the inner peripheral surface of the receiving portion 5 as described above, the engaging portion may be formed in either a convex shape or a concave shape.

また、前記実施例1では、凹溝50は、受口部5の開口端側に向かって漸次拡開して形成されているが、これに限らず凹溝は、上記凹溝50とは逆に、受口部の開口端側に向かって漸閉して形成されているものでもよい。このようにすることで、前記凹溝の開口が狭くなるため、この凹溝に対応して適宜形成された係合凸部が、凹溝に嵌合した後に抜け出ることを防止でき、所定の設置位置から防食部材が移動することがない。   In the first embodiment, the concave groove 50 is formed to gradually expand toward the opening end side of the receiving portion 5. However, the present invention is not limited to this, and the concave groove is opposite to the concave groove 50. Further, it may be formed so as to be gradually closed toward the opening end side of the receiving portion. By doing so, since the opening of the concave groove becomes narrow, the engagement convex portion appropriately formed corresponding to the concave groove can be prevented from coming out after fitting into the concave groove, and the predetermined installation The anticorrosion member does not move from the position.

前記実施例1、2では、係合凸部21,係合突設部25と係合部16,26とは管軸方向に沿って形成されているが、このようにすることで、係合凸部21,係合突設部25及び係合部16,26と受口部の内周面(係合凸部21は外側周面50a,内側周面50c、係合突設部25は内周面5g、係合部16,26は収容面5c。)に係合する係合延長を大きく取ることができ、防食部材14を受口部5にしっかりと設置することができる。またこれに限らず受口部の内周面に係合する係合凸部であればどこに配設されていてもよく、例えば、当接面17a,27と背面19,29との間に形成される外周等に前記実施例2のようなフィンが径方向に向かって形成されてもよい。   In the first and second embodiments, the engaging convex portion 21, the engaging projecting portion 25, and the engaging portions 16, 26 are formed along the pipe axis direction. Convex portion 21, engaging projecting portion 25 and engaging portions 16, 26 and inner peripheral surface of receiving portion (engaging convex portion 21 is outer peripheral surface 50a, inner peripheral surface 50c, engaging projecting portion 25 is inner The peripheral surface 5g and the engaging portions 16 and 26 can be greatly extended in engagement with the receiving surface 5c.), And the anticorrosion member 14 can be firmly installed in the receiving portion 5. Further, the present invention is not limited to this, and may be disposed anywhere as long as it is an engaging convex portion that engages with the inner peripheral surface of the receiving portion. For example, it is formed between the contact surfaces 17a and 27 and the back surfaces 19 and 29. A fin as in the second embodiment may be formed in the radial direction on the outer periphery or the like.

また、前記実施例1、2では、係合凸部21,係合突設部25と係合部16,26が環状に形成されているが、これに限らず係合部は外周面に周方向に沿って所定間隔おきに形成されているものでもよく、また前記実施例2のようなフィンが防食部材14の外周に点在して形成されたものでもよい。また、該係合部が係合される位置に対応して被係合部が形成されていると尚好ましい。   In the first and second embodiments, the engaging convex portion 21, the engaging projecting portion 25, and the engaging portions 16, 26 are formed in an annular shape, but the engaging portion is not limited to the outer peripheral surface. It may be formed at predetermined intervals along the direction, or may be formed such that fins as in Example 2 are scattered on the outer periphery of the anticorrosion member 14. Further, it is more preferable that the engaged portion is formed corresponding to the position where the engaging portion is engaged.

例えば、前記実施例1、2においては、防食部材14,24とシール部材8とが別々に設けられ、かつ、互いに管軸方向に所定距離離間した状態で配置されていたため、挿口部12が挿入した状態において、それぞれ別個に弾性変形するとともに、それぞれ弾性変形した部分が互いに干渉し合うことがなく、影響を及ぼすことがない。つまり、弾性変形した防食部材14,24がシール部材8に干渉して水密性に支障をきたしたり、逆に弾性変形したシール部材8が防食部材14,24に干渉して、管端面12cの被覆に支障をきたすようなことがない。   For example, in the first and second embodiments, the anticorrosion members 14 and 24 and the seal member 8 are provided separately and are arranged in a state of being separated from each other by a predetermined distance in the tube axis direction. In the inserted state, each elastically deforms separately, and the elastically deformed portions do not interfere with each other and do not affect each other. In other words, the elastically deformed anticorrosion members 14 and 24 interfere with the seal member 8 to hinder watertightness. Conversely, the elastically deformed seal member 8 interferes with the anticorrosion members 14 and 24 and covers the pipe end surface 12c. There will be no troubles.

また、シール部材8には、挿口部12の外周面12aと受口部5の内周面との間からの流体の漏出を防ぐに適した弾性を有する弾性材を選択し、防食部材14には、管端面12cの防食に適した弾性を有する弾性材を選択することができるため、管端面12cの腐食及び挿口部12の外周面12aと受口部5の内周面との間からの流体の漏出を効率よく防止することができる。   For the seal member 8, an elastic material having elasticity suitable for preventing leakage of fluid from between the outer peripheral surface 12 a of the insertion portion 12 and the inner peripheral surface of the receiving portion 5 is selected, and the anticorrosion member 14 is selected. Since an elastic material having elasticity suitable for corrosion prevention of the tube end surface 12c can be selected, the corrosion of the tube end surface 12c and the gap between the outer peripheral surface 12a of the insertion portion 12 and the inner peripheral surface of the receiving portion 5 can be selected. It is possible to efficiently prevent fluid from leaking out.

また、シール部材8と防食部材14,24とを一体的に形成して、挿口部12の外周面12aと受口部5の内周面との間からの流体の漏出を防止するとともに、挿口部12の管端面12cの腐食を防止することができる防食部材としてもよく、このような場合、受口部5に対する部材の装着が1回で済むため、装着手間が容易になる。   In addition, the seal member 8 and the anticorrosion members 14 and 24 are integrally formed to prevent leakage of fluid from between the outer peripheral surface 12a of the insertion portion 12 and the inner peripheral surface of the receiving portion 5, An anticorrosion member that can prevent the corrosion of the tube end surface 12c of the insertion portion 12 may be used. In such a case, the member can be attached to the receiving portion 5 only once, so that the installation work is facilitated.

また、前記実施例1では、径方向の中央部が両端部よりも挿口部12側に膨出する環状の膨出部が形成されていたが、例えば膨出部は必ずしも環状に形成されていなくてもよく、管端面との当接面から管端面に向けて複数の膨出部が周方向に沿って突設されていてもよい。   Moreover, in the said Example 1, although the annular bulging part which the center part of radial direction bulges in the insertion part 12 side rather than both ends was formed, for example, the bulging part is not necessarily formed in cyclic | annular form. The plurality of bulging portions may protrude from the contact surface with the tube end surface toward the tube end surface along the circumferential direction.

また、前記実施例1、2では、防食部材14,24として適宜弾性変形力を有するゴム材からなるゴム体が適用されていたが、押し潰された管端面12cに対して弾性復帰力により被覆して水密状態を形成しうるものであれば、材質はゴムに限定されるものではなく、種々の弾性材を適用可能である。   In the first and second embodiments, a rubber body made of a rubber material having an appropriate elastic deformation force is applied as the anticorrosion members 14 and 24. However, the crushed tube end surface 12c is covered with an elastic return force. As long as it can form a watertight state, the material is not limited to rubber, and various elastic materials can be applied.

また、前記実施例1、2では、防食部材14,24全体が同一素材にて形成されていたが、例えば管端面との当接面近傍のみを、他の部位と比較して軟質なゴム材にて形成して潰れやすくしてもよいし、あるいは管端面との当接面近傍のみを、他の部位と比較して高反発性を有するゴム材にて形成して弾性復帰力を向上させるようにしてもよい。   In the first and second embodiments, the anticorrosion members 14 and 24 are entirely formed of the same material. However, for example, only the vicinity of the contact surface with the pipe end surface is softer than other portions. It may be easily formed by crushing, or only the vicinity of the contact surface with the pipe end surface is formed of a rubber material having higher resilience than other parts to improve the elastic restoring force. You may do it.

また、前記実施例における抜脱規制手段は、ボルト孔5bと、固定爪10を押し込む押し込みボルト9と、固定爪10と、固定爪10が収容される円弧溝7と、から構成されていたが、受口部5に挿入された挿口部12の該受口部5からの抜脱を規制するものであれば、上記抜脱規制手段に限定されるものではなく、いわゆる押し輪等の受口部5とは別個に設けられたもの等、他の抜脱規制手段であってもよい。   Further, the removal restricting means in the above embodiment is constituted by the bolt hole 5b, the pushing bolt 9 for pushing the fixing claw 10, the fixing claw 10, and the arc groove 7 in which the fixing claw 10 is accommodated. As long as the insertion part 12 inserted into the receiving part 5 is restricted from being removed from the receiving part 5, the invention is not limited to the above-mentioned removal restricting means. Other extraction restriction means such as those provided separately from the mouth portion 5 may be used.

本発明の実施例1における管継手の配設状況を示す概略図である。It is the schematic which shows the arrangement | positioning condition of the pipe joint in Example 1 of this invention. 受口部と挿口部とを示す断面図である。It is sectional drawing which shows a receptacle part and an insertion part. (a)は、防食部材を示す正面図であり、(b)は、防食部材を示す右側面図であり、(c)は防食部材を示す左側面図であり、(d)は、図3(c)のA−A断面図である。(A) is a front view showing an anticorrosion member, (b) is a right side view showing the anticorrosion member, (c) is a left side view showing the anticorrosion member, and (d) is FIG. It is AA sectional drawing of (c). (a)は、防食部材が受口部に未だ装着されていない状態を示す拡大断面図であり、(b)は、防食部材が受口部に挿入されている状態を示す拡大断面図であり、(c)は、防食部材が設置位置に装着された状態を示す拡大断面図である。(A) is an expanded sectional view which shows the state by which the anticorrosion member is not yet mounted | worn by the receptacle part, (b) is an expanded sectional view which shows the state by which the anticorrosion member is inserted in the receptacle part (C) is an expanded sectional view which shows the state by which the anti-corrosion member was mounted | worn in the installation position. (a)は、挿口部の管端面が未だ防食部材により被覆されていない状態を示す断面図であり、(b)は、挿口部が図5(a)の状態から挿入方向に挿入された状態を示す断面図である。(A) is sectional drawing which shows the state by which the pipe end surface of the insertion part is not yet coat | covered with the anticorrosion member, (b) is an insertion part inserted in the insertion direction from the state of Fig.5 (a). It is sectional drawing which shows the state. (a)は、挿口部が図5(b)の状態からさらに挿入方向に挿入された後、挿口部の抜脱が規制された状態を示す断面図、(b)は、挿口部が図6(a)の状態から抜脱方向に移動した状態を示す断面図である。(A) is a cross-sectional view showing a state in which the insertion portion is restricted from being removed after the insertion portion is further inserted in the insertion direction from the state of FIG. 5 (b), and FIG. It is sectional drawing which shows the state which moved to the removal direction from the state of Fig.6 (a). (a)は、実施例2の防食部材を示す正面図であり、(b)は、防食部材を示す右側面図であり、(c)は防食部材を示す左側面図であり、(d)は、図7(c)のB−B断面図である。図8は、防食部材が受口部に未だ装着されていない状態を示す拡大断面図である。(A) is a front view which shows the anticorrosion member of Example 2, (b) is a right view which shows an anticorrosion member, (c) is a left view which shows an anticorrosion member, (d) These are BB sectional drawings of Drawing 7 (c). FIG. 8 is an enlarged cross-sectional view illustrating a state in which the anticorrosion member is not yet attached to the receiving portion. 防食部材が受口部に未だ装着されていない状態を示す拡大断面図である。It is an expanded sectional view showing the state where the anticorrosion member is not yet attached to the mouthpiece. 防食部材が受口部に挿入されている状態を示す拡大断面図である。It is an expanded sectional view which shows the state by which the anticorrosion member is inserted in the receiving part. 防食部材が設置位置に装着された状態を示す拡大断面図である。It is an expanded sectional view which shows the state with which the anticorrosion member was mounted | worn in the installation position. 管継手が構成された状態を示す断面図である。It is sectional drawing which shows the state by which the pipe joint was comprised.

符号の説明Explanation of symbols

1 管継手
5 受口部
5c 収容面(受口部の内周面)
5d 奥端面
5g 内周面(受口部の内周面)
12 挿口部
12c 管端面
14 防食部材
16 係合部
21 係合凸部(係合部)
25 係合突設部(係合部)
50 凹溝(被係合部)
1 Pipe Fitting 5 Receiving Portion 5c Housing Surface (Inner Peripheral Surface of Receiving Portion)
5d Back end surface 5g Inner peripheral surface (inner peripheral surface of the receiving portion)
12 Insertion Portion 12c Pipe End Surface 14 Anticorrosion Member 16 Engagement Part 21 Engagement Convex Part (engagement part)
25 Engagement projection (engagement part)
50 Groove (engaged part)

Claims (3)

一方の流体管を構成する挿口部と、
前記挿口部が挿入され、内周面に管軸とほぼ平行をなす環状の収容面と該収容面と連設し前記流体管の管軸に略直角に近い奥端面とが形成されて前記収容面と前記奥端面により形成された段差を有する他方の流体管を構成する受口部と、
環状に形成される弾性材から成り、前記挿口部の管端面と前記奥端面との間に配置されるとともに、前記受口部に挿入された挿口部の管端面と当接して該管端面を被覆する当接面を有する防食部材と、
を備え、
前記一方の流体管と前記他方の流体管とを水密状態で接続する管継手であって、
前記防食部材の係合部の外周側には、前記受口部の内周面の前記収容面と前記奥端面係合する外周面と背面とが周方向に沿って形成されており、前記係合部の外周面が前記受口部の内周面の前記収容面に、前記係合部の背面が前記受口部の内周面の前記奥端面に係合し、前記受口部の収容面と前記奥端面により形成された段差とを利用することで、前記防食部材の前記受口部に対する設置位置が決定され、
前記防食部材の前記係合部の内周側には、前記挿口部側に向けて延びるガイド面が形成されており、前記防食部材の内周面側には、前記挿口部の前記管端面と当接する前記当接面が形成されており、前記挿口部の前記管端面が前記防食部材の前記ガイド面により案内され、前記管端面と前記奥端面により前記防食部材の前記当接面が管軸方向に挟圧されて弾性変形し、前記当接面の内周面側が前記流体管軸方向に押し出されて膨出し、前記挿口部の内周面が前記当接面により被覆されるようになっていることを特徴とする管継手。
An insertion portion constituting one fluid pipe,
The insertion port is inserted, and an annular housing surface that is substantially parallel to the tube axis is formed on the inner peripheral surface, and a back end surface that is connected to the housing surface and is substantially perpendicular to the tube axis of the fluid pipe is formed. A receiving portion that constitutes the other fluid pipe having a step formed by the accommodation surface and the back end surface ;
It is made of an elastic material formed in an annular shape, and is disposed between the tube end surface and the back end surface of the insertion portion, and comes into contact with the tube end surface of the insertion portion inserted into the receiving portion. An anticorrosion member having a contact surface covering the end surface;
With
A pipe joint for connecting the one fluid pipe and the other fluid pipe in a watertight state,
On the outer peripheral side of the engaging portion of the anticorrosion member , an outer peripheral surface and a rear surface that are engaged with the receiving surface and the inner end surface of the receiving portion are formed along the circumferential direction, on the housing surface of the outer peripheral surface of the engaging portion is an inner circumferential surface of the socket portion, the back of the engaging portion is engaged with the back end surface of the inner peripheral surface of the socket portion, said socket portion By utilizing the step formed by the housing surface and the back end surface, the installation position of the anticorrosion member with respect to the receiving portion is determined,
A guide surface extending toward the insertion port side is formed on the inner peripheral side of the engaging portion of the anticorrosion member, and the tube of the insertion port portion is formed on the inner peripheral surface side of the anticorrosion member. The contact surface that contacts the end surface is formed, the tube end surface of the insertion portion is guided by the guide surface of the anticorrosion member, and the contact surface of the anticorrosion member is formed by the tube end surface and the back end surface. Is elastically deformed by being pinched in the tube axis direction, the inner peripheral surface side of the contact surface is pushed out and bulged in the fluid tube axis direction, and the inner peripheral surface of the insertion portion is covered by the contact surface. pipe fitting, characterized in that it is so that.
前記防食部材の前記係合部の前記背面には、前記受口部の前記奥端面と対向する位置に、管軸方向に沿って係合凸部が形成されており、前記奥端面には、前記係合凸部が係合する被係合部が形成されていることを特徴とする請求項1に記載の管継手。 On the back surface of the engagement portion of the anticorrosion member, an engagement convex portion is formed along the tube axis direction at a position facing the back end surface of the receiving portion, and on the back end surface, pipe joint of claim 1, wherein the engagement protrusion, characterized in that the engaged portion to be engaged is formed. 前記係合部は、前記奥端面よりも管奥側の内周面に係合可能に延設されていることを特徴とする請求項1または2に記載の管継手。 The engaging protrusions, the pipe joint according to claim 1 or 2, characterized in that it is engageable to extend to the inner peripheral surface of Kan'oku side of the back end surface.
JP2007167955A 2007-06-26 2007-06-26 Pipe fitting Expired - Fee Related JP5019971B2 (en)

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JP5723164B2 (en) * 2011-01-14 2015-05-27 コスモ工機株式会社 Rust prevention member
JP5722955B2 (en) * 2013-06-27 2015-05-27 株式会社水道技術開発機構 tube
JP2015021606A (en) * 2013-07-23 2015-02-02 株式会社栗本鐵工所 Pipe joint and liner used therefor
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