JP4949061B2 - Pipe fitting - Google Patents

Pipe fitting Download PDF

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JP4949061B2
JP4949061B2 JP2007032635A JP2007032635A JP4949061B2 JP 4949061 B2 JP4949061 B2 JP 4949061B2 JP 2007032635 A JP2007032635 A JP 2007032635A JP 2007032635 A JP2007032635 A JP 2007032635A JP 4949061 B2 JP4949061 B2 JP 4949061B2
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peripheral surface
outer peripheral
bulging
packing
pushing
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JP2008196607A (en
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実 澤田
昇 菊地
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Cosmo Koki Co Ltd
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Cosmo Koki Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/04—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Sleeves (AREA)

Description

本発明は、一方の管体を構成する挿口部と、挿口部に遊挿され、内周面には、端面側から内方に向かって縮径する傾斜面と、傾斜面に連続して更に内方に向かって形成される管軸に対して略平行の平行面と、を有している他方の管体を構成する受口部と、リング状に形成される弾性材から成り、受口部の内周面と挿口部の外周面の間に配置され、傾斜面と挿口部の外周面との間に位置する押込み部と、押込み部に連続して形成され、平行面と挿口部の外周面との間を密封するための先頭シール部と、を有するパッキンと、挿口部の外周面に沿って外嵌されるとともに、パッキンの押込み部の端面を管軸方向に押圧する押圧面を有する押輪と、受口部と押輪とパッキンとの管軸方向の相対移動が規制されるように、受口部と押輪とを連係して取付けられた取付部材と、を備えた管継手に関する。   The present invention includes an insertion portion that constitutes one tubular body, an inclined surface that is loosely inserted into the insertion portion, and has a diameter that decreases inward from the end surface side, and an inclined surface that is continuous with the inclined surface. And further comprising a receiving portion constituting the other tube body having a parallel surface substantially parallel to the tube axis formed inward, and an elastic material formed in a ring shape, A parallel surface that is formed between the inner peripheral surface of the receiving portion and the outer peripheral surface of the insertion portion, and that is formed between the inclined surface and the outer peripheral surface of the insertion portion, and is continuous with the pressing portion. And a front seal portion for sealing between the outer peripheral surface of the insertion portion, and an outer fit along the outer peripheral surface of the insertion portion, and the end surface of the pushing portion of the packing in the tube axis direction In order to restrict relative movement in the tube axis direction between the push ring having a pressing surface that presses against the pipe, and the receiving part, the push ring, and the packing, the receiving part and the push ring are linked together. A mounting member kicked relates pipe joint having a.

押輪により２つの管体を締結した配管の接合部から配管に流れる流体の漏出を防止する手段として、従来図８に示されるようなパッキン１０１が使用されていた（例えば、特許文献１参照）。以下、図８に例示されるパッキン１０１について説明する。すなわち、図８（ａ）において、一方の管体１０２の受口部１０３の内方は、他方の管体１２２の挿口部１２３が遊挿されている。   Conventionally, a packing 101 as shown in FIG. 8 has been used as means for preventing leakage of fluid flowing into a pipe from a joint portion of pipes in which two pipe bodies are fastened by a push ring (see, for example, Patent Document 1). Hereinafter, the packing 101 illustrated in FIG. 8 will be described. That is, in FIG. 8A, the insertion portion 123 of the other tubular body 122 is loosely inserted into the inside of the receiving portion 103 of one tubular body 102.

管体１０２の受口部１０３の端部の内方には、受口部１０３の開口端から内方に向かって縮径する内周面である傾斜面１０３ｂが周方向に沿って形成されている。またこの傾斜面１０３ｂに連続して更に内方に向かうともに、管軸に対して略平行である平行面１０３ｄが周方向に沿って形成されており、この平行面１０３ｄ内方側の端部には、管軸方向を向く奥端面１０３ｆが周方向に沿って形成されている。   An inclined surface 103b, which is an inner peripheral surface that decreases inward from the opening end of the receiving portion 103, is formed along the circumferential direction inside the end portion of the receiving portion 103 of the tubular body 102. Yes. Further, a parallel surface 103d that is continuous inward with the inclined surface 103b and that is substantially parallel to the tube axis is formed along the circumferential direction, and is formed at an end on the inner side of the parallel surface 103d. Is formed with a rear end face 103f facing the pipe axis direction along the circumferential direction.

パッキン１０１はリング状に形成され、ゴム等の弾性材から成り、このパッキン１０１は傾斜面１０３ｂと略平行な外周面を有している押込み部１０１ａが周方向に沿って形成されている。またこの押込み部１０１ａの紙面右側には、押込み部１０１ａと連続するとともに、周方向に沿って膨出される先頭シール部１０１ｂが形成されている。そして、この押込み部１０１ａの紙面左側の端部に押輪１１３側の端部に形成された押圧面１１３ｃが押圧する被押圧面１０１ｃが形成されている。   The packing 101 is formed in a ring shape and is made of an elastic material such as rubber. The packing 101 has a pressing portion 101a having an outer peripheral surface substantially parallel to the inclined surface 103b along the circumferential direction. Further, on the right side of the pushing portion 101a, a leading seal portion 101b that is continuous with the pushing portion 101a and bulges out in the circumferential direction is formed. And the to-be-pressed surface 101c which the pressing surface 113c formed in the edge part by the side of the press wheel 113 presses is formed in the edge part of the paper surface left side of this pushing part 101a.

そこで、これら管体１０２、１２２を接続されるに際し、先ず、押輪１１３とパッキン１０１を順に挿口部１２３に外嵌した状態で、挿口部１２３を受口部１０３内に挿入し、次いで、受口部１０３に形成されたフランジ部１０３ｇと押輪１１３のフランジ部１１３ｂに形成された夫々の取付孔１０３ｈ、１１３ｄにＴ頭ボルト１１１を挿通し、ナット１１２を螺挿して均等に閉め込んでいくと、図８（ｂ）に示されるように、パッキン１０１の被押圧面１０１ｃは押輪１１３の押圧面１１３ｃにより図示白抜矢印方向に押圧される。そして、パッキン１０１の先頭シール部１０１ｂが受口部１０３の平行面１０３ｄと挿口部１２３の外周面とが当接することで弾性変形し、先頭シール部１０１ｂの先端部が奥端面１０３ｆと当接するまで押し込まれる。その結果、受口部１０３の平行面１０３ｄと挿口部１２３の外周面との間が密封され、両管体１０２、１２２を流れる流体の漏出防止が成される。   Therefore, when connecting these tubular bodies 102 and 122, first, the insertion portion 123 is inserted into the receiving portion 103 in a state in which the push wheel 113 and the packing 101 are sequentially fitted to the insertion portion 123, and then, The T-head bolt 111 is inserted into the mounting holes 103h and 113d formed in the flange portion 103g formed in the receiving portion 103 and the flange portion 113b of the press ring 113, and the nut 112 is screwed in and closed evenly. 8B, the pressed surface 101c of the packing 101 is pressed by the pressing surface 113c of the press wheel 113 in the direction of the outlined arrow. The leading seal portion 101b of the packing 101 is elastically deformed when the parallel surface 103d of the receiving portion 103 and the outer peripheral surface of the insertion portion 123 come into contact with each other, and the leading end portion of the leading seal portion 101b comes into contact with the back end surface 103f. Is pushed in. As a result, the space between the parallel surface 103d of the receiving port portion 103 and the outer peripheral surface of the insertion port portion 123 is sealed, and leakage of fluid flowing through both the tubular bodies 102 and 122 is prevented.

特開平２００３−１６１３９３号公報（第６頁、第４図）Japanese Unexamined Patent Publication No. 2003-161393 (page 6, FIG. 4)

しかしながら、従来の流体漏出防止用のパッキン１０１を備えた管継手では、例えば地震等による不測の外力が生じ、挿口部１２３が受口部１０３から完全に抜き出るとはいわないまでも、挿口部１２３が受口部１０３に対して管軸方向に脱離する相対移動が起こった際には、パッキン１０１の先頭シール部１０１ｂが、挿口部１２３の外周面と受口部１０３の内周面と離間し、受口部１０３の傾斜面１０３ｂと挿口部１２３の外周面との間の密封性が維持されない状態になり、両管体１０２、１２２を流れる流体が、押込み部１０１ａの外周面と受口部１０３の傾斜面１０３ｂとの間、若しくは押込み部１０１ａの内周面と挿口部１２３の外周面との間を通過して、両管体１０２、１２２の外部に漏出するといった問題があった。   However, in the case of a pipe joint provided with the conventional gasket 101 for preventing fluid leakage, an unexpected external force is generated due to, for example, an earthquake, and the insertion portion 123 is not completely removed from the receiving portion 103. When a relative movement occurs in which the mouth portion 123 is detached from the receiving portion 103 in the tube axis direction, the leading seal portion 101b of the packing 101 moves between the outer peripheral surface of the insertion portion 123 and the receiving portion 103. The fluid is separated from the peripheral surface and the sealing performance between the inclined surface 103b of the receiving portion 103 and the outer peripheral surface of the insertion portion 123 is not maintained. It passes between the outer peripheral surface and the inclined surface 103b of the receiving portion 103 or between the inner peripheral surface of the pushing portion 101a and the outer peripheral surface of the insertion portion 123, and leaks to the outside of both the tubular bodies 102 and 122. There was a problem.

本発明は、このような問題点に着目してなされたもので、不測の外力が生じ、挿口部が受口部に対して管軸方向に脱離する相対移動が起こっても管体の接合部から流体の漏出を防止する管継手を提供することを目的とする。   The present invention has been made paying attention to such problems, and even if an unexpected external force is generated and the relative movement in which the insertion portion is detached from the receiving portion in the tube axis direction occurs, It aims at providing the pipe joint which prevents the leakage of the fluid from a junction part.

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、
一方の管体を構成する挿口部と、
該挿口部に遊挿され、内周面には、端面側から内方に向かって縮径する傾斜面と、該傾斜面に連続して更に内方に向かって形成される管軸に対して略平行の平行面と、を有している他方の管体を構成する受口部と、
リング状に形成される弾性材から成り、前記受口部の内周面と前記挿口部の外周面の間に配置され、前記傾斜面と前記挿口部の外周面との間に位置する押込み部と、該押込み部に連続して形成され、前記平行面と前記挿口部の外周面との間を密封するための先頭シール部と、を有するパッキンと、
前記挿口部の外周面に沿って外嵌されるとともに、前記パッキンの押込み部の端面を管軸方向に押圧する押圧面を有する押輪と、
前記受口部と前記押輪と前記パッキンとの管軸方向の相対移動が規制されるように、前記受口部と前記押輪とを連係して取付けられた取付部材と、を備えた管継手において、
前記パッキンの前記押込み部の外周面に形成された第１膨出部と前記パッキンの前記押込み部の内周面に形成された第２膨出部とからなり、前記第１膨出部は前記押込み部の外周面に対向する前記受口部の傾斜面に向かって膨出し、前記第２膨出部は前記押込み部の内周面に対向する前記挿口部の外周面に向かって膨出し、両膨出部は、周方向に沿って形成されており、前記第２膨出部は、前記第１膨出部から、前記押込み部の外周面の基準面に対し略直角に延びる直交線方向に形成され、該直交線上に、前記第１膨出部における最大膨出点である第１頂部と前記第２膨出部における最大膨出点である第２頂部とが通過するように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、先頭シール部に加えて、管内の流体の漏出路となる受口部の内周面とパッキンの押込み部の外周面との間に第１膨出部が形成され、挿口部の外周面とパッキンの押込み部の内周面との間に第２膨出部が形成されているため、例えば地震等による不測の外力が生じて、挿口部が受口部に対して管軸方向に所定長さ脱離する相対移動が起こっても、押込み部の外周面と受口部の傾斜面との間、及び押込み部の内周面と挿口部の外周面との間の密封を確実に維持することができる。そして、前記第２膨出部は、前記第１膨出部から、前記押込み部の外周面の基準面に対し略直角に延びる直交線方向に形成され、該直交線上に、前記第１膨出部における最大膨出点である第１頂部と前記第２膨出部における最大膨出点である第２頂部とが通過するように形成され、受口部の傾斜面から第１膨出部が受ける力の方向のほぼ延長上に第２膨出部が形成されているため、この力を有効に第２膨出部から挿口部の外周面に作用させ、結果的に押込み部の外周面と受口部の傾斜面との間、及び押込み部の内周面と挿口部の外周面との間の密封を維持することができる。 In order to solve the above problem, a pipe joint according to claim 1 of the present invention is
An insertion portion constituting one tube,
Is loosely inserted into the insertion opening, on the inner circumferential surface, the inclined surface whose diameter decreases toward the end face inward with respect to the tube axis that will be formed towards the further inwardly continuously inclined surface A receiving part that constitutes the other tubular body having a substantially parallel parallel plane,
It is made of an elastic material formed in a ring shape, and is disposed between the inner peripheral surface of the receiving portion and the outer peripheral surface of the insertion portion, and is located between the inclined surface and the outer peripheral surface of the insertion portion. A packing having a pushing portion and a leading seal portion formed continuously with the pushing portion for sealing between the parallel surface and the outer peripheral surface of the insertion portion;
A press ring having a pressing surface that is fitted around the outer peripheral surface of the insertion portion and presses the end surface of the pressing portion of the packing in the tube axis direction,
In a pipe joint comprising: an attachment member attached in linkage with the receptacle and the push ring so that relative movement of the receptacle, the push ring, and the packing in the tube axis direction is restricted. ,
The first bulging portion is formed of a first bulging portion formed on an outer peripheral surface of the pushing portion of the packing and a second bulging portion formed on an inner peripheral surface of the pushing portion of the packing. The second bulging portion bulges toward the outer peripheral surface of the insertion portion facing the inner peripheral surface of the pressing portion, and bulges toward the inclined surface of the receiving portion facing the outer peripheral surface of the pressing portion. Both bulging portions are formed along a circumferential direction, and the second bulging portion is orthogonally extending from the first bulging portion at a substantially right angle to a reference surface of the outer peripheral surface of the pushing portion. It is formed in a line direction so that the first top that is the maximum bulge point in the first bulge and the second top that is the maximum bulge in the second bulge pass through the orthogonal line. It is characterized by being formed .
According to this feature, in addition to the leading seal portion, a first bulging portion is formed between the inner peripheral surface of the receiving port serving as a fluid leakage path in the pipe and the outer peripheral surface of the pushing portion of the packing. Since the second bulging part is formed between the outer peripheral surface of the mouth part and the inner peripheral surface of the pushing part of the packing, an unexpected external force is generated due to, for example, an earthquake, and the insertion part is Even if a relative movement that desorbs a predetermined length in the tube axis direction occurs , the distance between the outer peripheral surface of the pushing portion and the inclined surface of the receiving portion, and the inner peripheral surface of the pushing portion and the outer peripheral surface of the inserting portion. It is possible to reliably maintain a seal between them. The second bulging portion is formed in an orthogonal line direction extending from the first bulging portion at a substantially right angle to a reference surface of the outer peripheral surface of the pushing portion, and the first bulging portion is formed on the orthogonal line. The first bulge portion is formed so as to pass through the first bulge point that is the maximum bulge point in the portion and the second bulge portion that is the maximum bulge point in the second bulge portion. Since the second bulging portion is formed substantially on the extension of the direction of the force to be received, this force is effectively applied from the second bulging portion to the outer peripheral surface of the insertion portion, and as a result, the outer peripheral surface of the pushing portion. And the inclined surface of the receiving portion, and the sealing between the inner peripheral surface of the pushing portion and the outer peripheral surface of the insertion portion can be maintained.

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、
前記押込み部の外周面と前記押込み部の内周面の少なくとも一方に、前記膨出部が複数条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、不測の外力が生じても、膨出部が管軸方向に複数条形成されていることで管体の密封性が向上できる。 The pipe joint according to claim 2 of the present invention is the pipe joint according to claim 1 ,
A plurality of the bulging portions are formed on at least one of the outer peripheral surface of the pushing portion and the inner peripheral surface of the pushing portion.
According to this feature, even if an unexpected external force is generated, the sealing performance of the tubular body can be improved by forming a plurality of bulged portions in the tube axis direction.

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、
前記膨出部は、前記押込み部の端面近傍に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、不測の外力が生じても、管軸方向における先頭シール部から押込み部の端面近傍までの距離分だけ受口部に対して挿口部が脱離する相対移動を許容して、管体の密封性が維持される。更に、膨出部が押込み部の端面近傍に形成されているため、受口部と挿口部の間に受口部に向かってパッキンが装着される際に、最後に膨出部が押込み部の外周面と受口部の傾斜面との間、若しくは押込み部の内周面と挿口部の外周面との間に配置されることになるので、押込み部の外周面と受口部の傾斜面との間、若しくは押込み部の内周面と挿口部の外周面との間を膨出部が密栓する状態を形成してパッキンが装着されることになり、管体の密封性を維持できる。 The pipe joint according to claim 3 of the present invention is the pipe joint according to claim 1 or 2 ,
The bulging portion is formed in the vicinity of an end surface of the pushing portion.
According to this feature, even if an unexpected external force is generated, relative movement in which the insertion portion is detached from the receiving portion by the distance from the leading seal portion in the tube axis direction to the vicinity of the end surface of the pushing portion is allowed. Thus, the sealing performance of the tube body is maintained. Furthermore, since the bulging part is formed in the vicinity of the end face of the pushing part, when the packing is mounted toward the receiving part between the receiving part and the insertion part, the bulging part is finally the pushing part. Between the outer peripheral surface of the pushing portion and the inclined surface of the receiving portion, or between the inner peripheral surface of the pushing portion and the outer peripheral surface of the inserting portion. The packing is attached by forming a state in which the bulging portion seals between the inclined surface or between the inner peripheral surface of the push-in portion and the outer peripheral surface of the insertion portion, thereby improving the sealing performance of the tube body. Can be maintained.

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、本発明の実施例における管継手の全体像を示す分解斜視図である。図２は、管継手のパッキンにおける一部断面図である。図３（ａ）は、パッキン取付け前の管継手を示す一部断面図、（ｂ）は、パッキン取付け後の管継手を示す一部断面図である。図４は、挿口部が受口部に対して管軸方向に脱離する相対移動が起こった時の管継手を示す一部断面図である。図５は、変形例１における管継手のパッキンを示す一部断面図である。図６は、変形例２における管継手のパッキンを示す一部断面図である。図７は、変形例３における管継手のパッキンを示す一部断面図である。   An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is an exploded perspective view showing an overall image of a pipe joint in an embodiment of the present invention. FIG. 2 is a partial cross-sectional view of a pipe joint packing. FIG. 3A is a partial cross-sectional view showing the pipe joint before the packing is attached, and FIG. 3B is a partial cross-sectional view showing the pipe joint after the packing is attached. FIG. 4 is a partial cross-sectional view showing the pipe joint when a relative movement occurs in which the insertion portion is detached from the receiving portion in the tube axis direction. FIG. 5 is a partial cross-sectional view showing the packing of the pipe joint in the first modification. FIG. 6 is a partial cross-sectional view showing the packing of the pipe joint in the second modification. FIG. 7 is a partial cross-sectional view showing the packing of the pipe joint in the third modification.

図１、３に示されるように、一方の管体の端部に他方の管体を挿入して、水密、若しくは気密にシールする管継手の構造は、従来の構成と略同一構成となっている。具体的には、パッキン１と押輪１３と、が挿口部２３の外周面２３ａに外嵌された状態で他方の管体２２の対向端部である挿口部２３が遊挿される。すなわち、挿口部２３の外周面２３ａと受口部３の内周面との間に所定の間隙を形成して挿入される。そして、パッキン１が、受口部３の内周面と、挿口部２３の外周面２３ａと、の間に押輪１３により押込まれ、両管体２、２２を気密もしくは水密にシールする。   As shown in FIGS. 1 and 3, the structure of a pipe joint in which the other pipe is inserted into the end of one pipe and sealed in a watertight or airtight manner is substantially the same as the conventional configuration. Yes. Specifically, the insertion portion 23 that is the opposite end portion of the other tubular body 22 is loosely inserted in a state where the packing 1 and the presser wheel 13 are fitted on the outer peripheral surface 23 a of the insertion portion 23. That is, it is inserted with a predetermined gap between the outer peripheral surface 23 a of the insertion portion 23 and the inner peripheral surface of the receiving portion 3. Then, the packing 1 is pushed between the inner peripheral surface of the receiving portion 3 and the outer peripheral surface 23a of the insertion portion 23 by the pusher wheel 13 to seal both the tubular bodies 2 and 22 in an airtight or watertight manner.

また受口部３のフランジ部３ｇに所定間隔おきに周方向に複数の取付孔３ｈが形成されており、ナット１２側の端部に周方向に沿って形成された押輪１３のフランジ部１３ｂには、この受口部３のフランジ部３ｇの取付孔３ｈと同軸となるよう、押輪１３のフランジ部１３ｂに複数形成された取付孔１３ｄが所定間隔おきに周方向に設けられている。   Further, a plurality of mounting holes 3h are formed in the circumferential direction in the flange portion 3g of the receiving portion 3 at predetermined intervals, and a flange portion 13b of the press ring 13 formed along the circumferential direction at the end portion on the nut 12 side. A plurality of mounting holes 13d formed in the flange portion 13b of the pusher wheel 13 are provided in the circumferential direction at predetermined intervals so as to be coaxial with the mounting hole 3h of the flange portion 3g of the receiving portion 3.

そして、受口部３のフランジ部３ｇの取付孔３ｈと押輪１３のフランジ部１３ｂの取付孔１３ｄを取付部材としてのＴ頭ボルト１１とナット１２が取付孔３ｈ、１３ｄの個数に対応して取付けられることで、パッキン１と受口部３と押輪１３の相対移動が規制される。尚、図１ではＴ頭ボルト１１とナット１２は１組のみ示し、その他は省略している。   The T-head bolt 11 and the nut 12 as mounting members are attached to the mounting holes 3h of the flange portion 3g of the receiving port 3 and the mounting holes 13d of the flange portion 13b of the press ring 13 corresponding to the number of mounting holes 3h and 13d. As a result, the relative movement of the packing 1, the receiving port 3, and the press wheel 13 is restricted. In FIG. 1, only one set of T-head bolt 11 and nut 12 is shown, and the others are omitted.

具体的な管継手の構成は、図３（ａ）に示されるように、管体２の受口部３の端部の内方には、受口部３の端面３ａから内方に向かって縮径する内周面である傾斜面３ｂが周方向に沿って形成されている。また傾斜面３ｂに連続して更に受口部３の内方に向かうとともに、管軸に対して略平行である平行面３ｄが周方向に沿って形成されている。更に、平行面３ｄより更に内方側の端部には、受口部３の外方を向く奥端面３ｆが周方向に沿って形成される。そして、後述のように、受口部３の内周面、すなわち傾斜面３ｂ及び平行面３ｄと、挿口部２３の外周面２３ａとの間にパッキン１が嵌入される。   As shown in FIG. 3A, a specific configuration of the pipe joint is formed inwardly from the end surface 3a of the receiving portion 3 inwardly of the end portion of the receiving portion 3 of the pipe body 2. An inclined surface 3b, which is an inner peripheral surface with a reduced diameter, is formed along the circumferential direction. Further, a parallel surface 3d is formed along the circumferential direction which is continuous with the inclined surface 3b and further inward of the receiving portion 3 and substantially parallel to the tube axis. Furthermore, a rear end surface 3f facing outward from the receiving portion 3 is formed along the circumferential direction at an end portion on the further inner side than the parallel surface 3d. As will be described later, the packing 1 is inserted between the inner peripheral surface of the receiving portion 3, that is, the inclined surface 3 b and the parallel surface 3 d, and the outer peripheral surface 23 a of the insertion portion 23.

本実施例における管継手のパッキン１は、リング状に形成されるゴム等の弾性材から形成されており、このパッキン１には、傾斜面３ｂと略平行に形成された外周面１ｄを有している押込み部１ａが周方向に沿って形成されている。またこの押込み部１ａの図３（ａ）紙面右方には、押込み部１ａと連続するとともに、周方向に沿って自然状態において膨出する先頭シール部１ｂが形成されている。更に、この押込み部１ａにおける図３（ａ）紙面左側の端部には、押輪１３が押圧する端面である被押圧面１ｃが形成されている。   The packing 1 of the pipe joint in the present embodiment is formed from an elastic material such as a rubber formed in a ring shape, and this packing 1 has an outer peripheral surface 1d formed substantially parallel to the inclined surface 3b. The pushing portion 1a is formed along the circumferential direction. Further, a leading seal portion 1b that is continuous with the pushing portion 1a and bulges in the natural state along the circumferential direction is formed on the right side of the pushing portion 1a in FIG. 3A. Further, a pressed surface 1c, which is an end surface pressed by the press wheel 13, is formed at the end of the pressing portion 1a on the left side of FIG. 3A.

また図２に示されるように、押込み部１ａの外周面１ｄには、押込み部１ａの外周面１ｄに対向する受口部３の傾斜面３ｂに向かって膨出する膨出部としての第１膨出部９が周方向に沿って形成されている。   As shown in FIG. 2, the outer peripheral surface 1d of the pushing portion 1a has a first bulging portion that bulges toward the inclined surface 3b of the receiving portion 3 that faces the outer peripheral surface 1d of the pushing portion 1a. The bulging part 9 is formed along the circumferential direction.

ここで、この第１膨出部９を除外したとして形成される外周面１ｄと略同一の仮想の平面としての基準面Ａを想定すると、第１膨出部９から、この基準面Ａに対して略直角に延びる仮想の直交線Ｂと、押込み部１ａの内周面１ｅと、が交差する位置に、押込み部１ａの内周面１ｅに対向する挿口部２３の外周面２３ａに向かって膨出する第２膨出部１０が周方向に沿って形成されている。   Here, assuming a reference plane A as a virtual plane that is substantially the same as the outer peripheral surface 1 d formed by excluding the first bulging portion 9, the first bulging portion 9 is directed to the reference plane A. Toward the outer circumferential surface 23a of the insertion portion 23 facing the inner circumferential surface 1e of the pushing portion 1a at a position where a virtual orthogonal line B extending substantially perpendicularly intersects the inner circumferential surface 1e of the pushing portion 1a. A bulging second bulging portion 10 is formed along the circumferential direction.

押輪１３は、図３（ａ）に示されるように、紙面右側に形成される環状押圧部１３ａと、前記したフランジ部１３ｂと、から形成されており、この環状押圧部１３ａには、パッキン１の被押圧面１ｃと対向する押圧面１３ｃが形成されている。   As shown in FIG. 3A, the press ring 13 is formed of an annular pressing portion 13a formed on the right side of the paper surface and the flange portion 13b. The annular pressing portion 13a includes a packing 1 A pressing surface 13c facing the pressed surface 1c is formed.

次に管体２、２２の接続について説明すると、先ず、押輪１３とパッキン１を順に挿口部２３にあらかじめ外嵌した状態で、挿口部２３を受口部３内に挿入する。   Next, the connection of the tubes 2 and 22 will be described. First, the insertion portion 23 is inserted into the receiving portion 3 in a state where the presser wheel 13 and the packing 1 are sequentially fitted in advance to the insertion portion 23.

次いで、受口部３と押輪１３の夫々のフランジ部３ｇ、１３ｂに周方向に複数のＴ頭ボルト１１を挿通し、ナット１２を螺挿して同方向に均等に閉め込んでいくと、図３（ｂ）に示されるように、パッキン１の被押圧面１ｃは、押輪１３の押圧面１３ｃにより図示白抜矢印方向に向かって押圧されて、パッキン１は、受口部３の内方に向かって押込まれる。そして、パッキン１の先頭シール部１ｂが受口部３の傾斜面３ｂと挿口部２３の外周面２３ａに当接することで弾性変形し、更に、パッキン１の先頭シール部１ｂが受口部３の平行面３ｄと挿口部２３の外周面２３ａと当接することで先頭シール部１ｂが平行面３ｄと挿口部２３の外周面２３ａとの間に嵌入され、最終的に先頭シール部１ｂの先端部が奥端面３ｆと当接するまで押し込まれる。この結果、先頭シール部１ｂにより平行面３ｄと挿口部２３の外周面２３ａとの間が密封される。   Next, when a plurality of T-head bolts 11 are inserted in the flange portions 3g and 13b of the receiving portion 3 and the press ring 13 in the circumferential direction, and nuts 12 are screwed in and closed evenly in the same direction, FIG. As shown in (b), the pressed surface 1c of the packing 1 is pressed by the pressing surface 13c of the press ring 13 in the direction of the white arrow in the figure, and the packing 1 faces inward of the receiving portion 3. Pushed. The leading seal portion 1b of the packing 1 is elastically deformed by coming into contact with the inclined surface 3b of the receiving portion 3 and the outer peripheral surface 23a of the insertion portion 23, and the leading seal portion 1b of the packing 1 is further received by the receiving portion 3. The leading seal portion 1b is fitted between the parallel surface 3d and the outer peripheral surface 23a of the insertion opening 23 by contacting the parallel surface 3d of the insertion opening 23 and the outer peripheral surface 23a of the insertion opening 23, and finally the leading seal portion 1b. The tip is pushed in until it comes into contact with the back end surface 3f. As a result, the space between the parallel surface 3d and the outer peripheral surface 23a of the insertion portion 23 is sealed by the head seal portion 1b.

一方、第１膨出部９は、被押圧面１ｃは押輪１３の押圧面１３ｃにより管軸方向に押圧され、受口部３の傾斜面３ｂと当接することで弾性変形し、傾斜面３ｂと挿口部２３の外周面２３ａとの間に押し込まれる。また、第２膨出部１０は、被押圧面１ｃは押輪１３の押圧面１３ｃにより管軸方向に押圧され、挿口部２３の外周面２３ａと当接することで弾性変形し、受口部３の傾斜面３ｂと挿口部２３の外周面２３ａとの間に押し込まれる。この時、押輪１３の押圧により受口部３の傾斜面３ｂから第１膨出部９に挿口部２３の外周面２３ａに向かって図３（ｂ）の黒塗矢印の方向の力が伝達され、この力を第２膨出部１０により挿口部２３の外周面に作用されるため、第１膨出部９により、押込み部１ａの外周面１ｄと受口部３の傾斜面３ｂとの間が密封され、第２膨出部１０により、押込み部１ａの内周面１ｅと挿口部２３の外周面２３ａの間が密封される。   On the other hand, the first bulging portion 9 is elastically deformed by the pressed surface 1c being pressed in the tube axis direction by the pressing surface 13c of the press wheel 13 and coming into contact with the inclined surface 3b of the receiving portion 3, and the inclined surface 3b It is pushed between the outer peripheral surface 23a of the insertion opening 23. Further, the second bulging portion 10 is elastically deformed when the pressed surface 1 c is pressed in the tube axis direction by the pressing surface 13 c of the press wheel 13 and comes into contact with the outer peripheral surface 23 a of the insertion portion 23. Between the inclined surface 3 b and the outer peripheral surface 23 a of the insertion portion 23. At this time, the force in the direction of the black arrow in FIG. 3B is transmitted from the inclined surface 3 b of the receiving portion 3 to the first bulging portion 9 toward the outer peripheral surface 23 a of the insertion portion 23 by the pressing of the push wheel 13. Since this force is applied to the outer peripheral surface of the insertion portion 23 by the second bulging portion 10, the first bulging portion 9 causes the outer peripheral surface 1d of the pushing portion 1a and the inclined surface 3b of the receiving portion 3 to Is sealed, and the second bulging portion 10 seals between the inner peripheral surface 1e of the pushing portion 1a and the outer peripheral surface 23a of the insertion portion 23.

地震等による不測の外力が生じた場合は、図４に示されるように、挿口部２３が管軸方向にすなわち図示白抜矢印の方向に脱離する相対移動が起こり、弾性変形していたパッキン１の先頭シール部１ｂが元の自然状態に復元するため、受口部３の平行面３ｄと挿口部２３の外周面２３ａとの間の密封性が維持されない状態になる。   When an unexpected external force is generated due to an earthquake or the like, as shown in FIG. 4, relative insertion occurs in which the insertion portion 23 is detached in the tube axis direction, that is, in the direction of the white arrow in the figure, and is elastically deformed. Since the leading seal portion 1b of the packing 1 is restored to the original natural state, the sealing performance between the parallel surface 3d of the receiving portion 3 and the outer peripheral surface 23a of the insertion portion 23 is not maintained.

しかし上記に示したように、先頭シール部１ｂに加えて、パッキン１の外周面１ｄとパッキン１の内周面１ｅに夫々第１膨出部９と第２膨出部１０が形成されているため、挿口部２３が受口部３に対して管軸方向に所定長さ脱離する相対移動が起こっても、依然として、押輪１３の押圧により受口部３の傾斜面３ｂから第１膨出部９に挿口部２３の外周面２３ａに向かって図示黒塗矢印方向の力が伝達され、この力を第２膨出部１０により挿口部２３の外周面２３ａに作用させる。よって流体の漏出路としてなり得る受口部３の内周面と押込み部１ａの外周面１ｄとの間と、挿口部２３の外周面２３ａと押込み部１ａの内周面１ｅとの間と、を確実に密封することができるため、両管体２、２２の気密性、若しくは水密性が保持され、流体の漏出防止が成される。   However, as shown above, in addition to the leading seal portion 1b, a first bulging portion 9 and a second bulging portion 10 are formed on the outer peripheral surface 1d of the packing 1 and the inner peripheral surface 1e of the packing 1, respectively. For this reason, even if the insertion portion 23 is moved relative to the receiving portion 3 by a predetermined length in the tube axis direction, the first bulge still remains from the inclined surface 3b of the receiving portion 3 due to the pressing of the pusher wheel 13. The force in the direction of the black arrow shown in the figure is transmitted to the protruding portion 9 toward the outer peripheral surface 23 a of the insertion portion 23, and this force is applied to the outer peripheral surface 23 a of the insertion portion 23 by the second bulging portion 10. Therefore, between the inner peripheral surface of the receiving port 3 that can be a fluid leakage path and the outer peripheral surface 1d of the push-in portion 1a, and between the outer peripheral surface 23a of the insertion port 23 and the inner peripheral surface 1e of the push-in portion 1a. Therefore, the airtightness or watertightness of both the pipe bodies 2 and 22 is maintained, and fluid leakage is prevented.

特に、第２膨出部１０は、第１膨出部９から、押込み部１ａの外周面１ｄの基準面Aに略直角に延びる方向（直交線Ｂ上付近）に形成されていることで、受口部３の傾斜面３ｂから第１膨出部９が受ける力を有効に第２膨出部１０から挿口部２３の外周面２３ａに作用させ、結果的に押込み部１ａの内周面１ｅと挿口部２３の外周面２３ａとの間の密封を維持することができる。また、第１膨出部９は、断面視円弧形状を形成するように曲面を描いて膨出しているため、受口部３の傾斜面３ｂから第１膨出部９が受ける力は、挿口部２３の外周面２３ａに向かって放射状に分散されているが、傾斜面３ｂに対して略直角の向き（直交線Ｂの向き）が集中的に受口部３の傾斜面３ｂから第１膨出部９が力を受けることになる。   In particular, the second bulging part 10 is formed in a direction (near the orthogonal line B) extending from the first bulging part 9 substantially perpendicular to the reference surface A of the outer peripheral surface 1d of the pushing part 1a. The force received by the first bulging portion 9 from the inclined surface 3b of the receiving portion 3 is effectively applied to the outer peripheral surface 23a of the insertion portion 23 from the second bulging portion 10, and as a result, the inner peripheral surface of the pushing portion 1a. Sealing between 1e and the outer peripheral surface 23a of the insertion portion 23 can be maintained. Further, since the first bulging portion 9 bulges in a curved surface so as to form a circular arc shape in cross section, the force received by the first bulging portion 9 from the inclined surface 3b of the receiving portion 3 is inserted. Although distributed radially toward the outer peripheral surface 23a of the mouth portion 23, the direction substantially perpendicular to the inclined surface 3b (the direction of the orthogonal line B) is concentrated from the inclined surface 3b of the receiving portion 3 to the first. The bulging part 9 receives force.

更に尚、図２にでも示されるように、本実施例のパッキンは、基準面Ａに対して第１膨出部９における最大膨出点である第１頂部Ｐａを通過する仮想の直交線Ｂを想定して、この直交線Ｂ上に、押込み部１ａの内周面１ｅに対して第２膨出部１０における最大膨出点である第２頂部Ｐｂが通過するように第２膨出部１０が形成されており、このようにすることで、第１膨出部９が受口部３の傾斜面３ｂからの力を効果的に受け、この力を第２膨出部１０から挿口部２３の外周面２３ａに効果的に作用させ、結果的に押込み部１ａの内周面１ｅと挿口部２３の外周面２３ａとの間の密封性が向上できる。尚、第１頂部Ｐａ、第２頂部Ｐｂは周方向に沿って連続的に形成されている。   Further, as shown in FIG. 2, the packing of the present embodiment is a virtual orthogonal line B that passes through the first top portion Pa that is the maximum bulging point in the first bulging portion 9 with respect to the reference plane A. As a result, the second bulge portion is arranged such that the second bulge portion Pb that is the maximum bulge point of the second bulge portion 10 passes on the orthogonal line B with respect to the inner peripheral surface 1e of the push portion 1a. 10 is formed, and by doing so, the first bulging portion 9 effectively receives the force from the inclined surface 3b of the receiving portion 3, and this force is inserted from the second bulging portion 10 into the insertion port. As a result, the sealing performance between the inner peripheral surface 1e of the pushing portion 1a and the outer peripheral surface 23a of the insertion portion 23 can be improved. In addition, the 1st top part Pa and the 2nd top part Pb are formed continuously along the circumferential direction.

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.

変形例２として、図６に示されるように、パッキン１の押込み部１ａの外周面１ｄと押込み部１ａの内周面１ｅに、夫々第１膨出部９ｂ、９ｃ、第２膨出部１０ｂ、１０ｃが２条形成されてもよく、また特に図示はしないが、パッキン１の押込み部１ａの外周面１ｄと押込み部１ａの内周面１ｅに、夫々第１膨出部、第２膨出部が３条以上形成されてもよい。さらに特に図示はしないが、パッキン１の押込み部１ａの外周面１ｄに第１膨出部が複数条形成されているのみでもよく、同様にパッキン１の押込み部１ａの内周面１ｅに第２膨出部が複数条形成されているのみでもよい。   As a second modification, as shown in FIG. 6, first bulging portions 9 b and 9 c and a second bulging portion 10 b are respectively formed on the outer peripheral surface 1 d of the pushing portion 1 a of the packing 1 and the inner circumferential surface 1 e of the pushing portion 1 a. 10c may be formed, and although not particularly shown, a first bulging portion and a second bulging portion are formed on the outer peripheral surface 1d of the pressing portion 1a of the packing 1 and the inner peripheral surface 1e of the pressing portion 1a, respectively. Three or more sections may be formed. Further, although not particularly illustrated, a plurality of first bulging portions may be formed on the outer peripheral surface 1d of the pushing portion 1a of the packing 1, and similarly, the second is formed on the inner peripheral surface 1e of the pushing portion 1a of the packing 1. Only a plurality of bulging portions may be formed.

このようにすることで、不測の外力が生じても、膨出部としての第１膨出部若しくは、第２膨出部が管軸方向に複数条形成されていることで両管体２、２２の密封性が向上できる。   By doing in this way, even if unexpected external force arises, both the tube bodies 2 by the 1st bulging part as a bulging part, or the 2nd bulging part being formed in multiple strips in the pipe-axis direction, The sealing property of 22 can be improved.

更に変形例３として、図７に示されるように、第１膨出部９ｄと第２膨出部１０ｄは、押込み部１ａの被押圧面１ｃの近傍に形成されている。尚、図示はされないが、被押圧面１ｃの近傍の押込み部１ａの外周面１ｄに第１膨出部９ｄが形成されているのみでもよく、同様に被押圧面１ｃの近傍の押込み部１ａの内周面１ｅに第２膨出部１０ｄが形成されているのみでもよい。このようにすることで以下の効果を奏する。   Furthermore, as a third modification, as shown in FIG. 7, the first bulging portion 9d and the second bulging portion 10d are formed in the vicinity of the pressed surface 1c of the pushing portion 1a. Although not shown, the first bulging portion 9d may be formed only on the outer peripheral surface 1d of the pressing portion 1a in the vicinity of the pressed surface 1c. Similarly, the pressing portion 1a in the vicinity of the pressed surface 1c Only the second bulging portion 10d may be formed on the inner peripheral surface 1e. By doing so, the following effects can be obtained.

すなわち、不測の外力が生じても、管軸方向における先頭シール部１ｂから押込み部１ａの被押圧面１ｃの近傍までの距離分だけ受口部３に対して挿口部２３が脱離する相対移動を許容して、両管体２、２２の密封性が維持される。更に、第１膨出部９ｄ若しくは、第２膨出部１０ｄが押込み部１ａの被押圧面１ｃ近傍に形成されているため、受口部３と挿口部２３の間に受口部３に向かってパッキン１が装着される際に、最後に押込み部１ａの外周面１ｄと受口部３の傾斜面３ｂとの間、若しくは押込み部１ａの内周面１ｅと挿口部２３の外周面２３ａとの間に、第１膨出部９ｄ若しくは、第２膨出部１０ｄが配置されることになるので、押込み部１ａの外周面１ｄと受口部３の傾斜面３ｂとの間若しくは、押込み部１ａの内周面１ｅと挿口部２３の外周面２３ａとの間を夫々第１膨出部９ｄ若しくは、第２膨出部１０ｄが密栓する状態を形成してパッキン１が装着されることになり、両管体２、２２の密封性を維持できる。   That is, even if an unexpected external force is generated, the insertion portion 23 is detached from the receiving portion 3 by the distance from the leading seal portion 1b in the tube axis direction to the vicinity of the pressed surface 1c of the pushing portion 1a. Allowing the movement, the sealing performance of both the tubular bodies 2 and 22 is maintained. Furthermore, since the first bulging portion 9d or the second bulging portion 10d is formed in the vicinity of the pressed surface 1c of the pushing portion 1a, the receiving portion 3 is provided between the receiving portion 3 and the insertion portion 23. Finally, when the packing 1 is mounted, it is finally between the outer peripheral surface 1d of the pushing portion 1a and the inclined surface 3b of the receiving portion 3, or the inner peripheral surface 1e of the pushing portion 1a and the outer peripheral surface of the insertion portion 23. 23a, the first bulging portion 9d or the second bulging portion 10d is disposed between the outer peripheral surface 1d of the pushing portion 1a and the inclined surface 3b of the receiving portion 3, or The packing 1 is mounted by forming a state in which the first bulging portion 9d or the second bulging portion 10d is sealed between the inner peripheral surface 1e of the push-in portion 1a and the outer peripheral surface 23a of the insertion portion 23. As a result, the sealing performance of both the tubular bodies 2 and 22 can be maintained.

尚、図７においては、第１膨出部９ｄは、被押圧面１ｃから所定距離離間した近傍に形成されており、第２膨出部１０ｄが被押圧面１ｃに係るように形成されている。この構成は、上述したように、受口部３の内方に向かって縮径する傾斜面３ｂを有しているため、受口部３の傾斜面３ｂから第１膨出部９ｄが受ける力の方向のほぼ延長上の近傍に第２膨出部１０ｄが形成されていると、この力を有効に第２膨出部１０ｄから挿口部２３の外周面２３ａに作用させることができ、効果的に押込み部１ａの外周面１ｄと受口部３の傾斜面３ｂとの間と、押込み部１ａの内周面１ｅと挿口部２３の外周面２３ａとの間と、の密封を維持することができる。   In FIG. 7, the first bulging portion 9d is formed in the vicinity of a predetermined distance from the pressed surface 1c, and the second bulging portion 10d is formed so as to be related to the pressed surface 1c. . As described above, since this configuration has the inclined surface 3b that is reduced in diameter toward the inside of the receiving portion 3, the force that the first bulging portion 9d receives from the inclined surface 3b of the receiving portion 3 If the second bulging portion 10d is formed in the vicinity of substantially extending in the direction of the direction, this force can be effectively applied to the outer peripheral surface 23a of the insertion portion 23 from the second bulging portion 10d. Thus, the sealing between the outer peripheral surface 1d of the pushing portion 1a and the inclined surface 3b of the receiving portion 3 and between the inner peripheral surface 1e of the pushing portion 1a and the outer peripheral surface 23a of the insertion portion 23 is maintained. be able to.

本発明の実施例における管継手の全体像を示す分解斜視図である。It is a disassembled perspective view which shows the whole image of the pipe joint in the Example of this invention. 管継手のパッキンにおける一部断面図である。It is a partial cross section figure in packing of a pipe joint. （ａ）は、パッキン取付け前の管継手を示す一部断面図、（ｂ）は、パッキン取付け後の管継手を示す一部断面図である。(A) is a partial cross section figure which shows the pipe joint before packing installation, (b) is a partial cross section figure which shows the pipe joint after packing installation. 挿口部が受口部に対して管軸方向に脱離する相対移動が起こった時の管継手を示す一部断面図である。It is a partial cross section figure which shows a pipe joint when the relative movement which the insertion part detaches | leaves in a pipe-axis direction with respect to the receiving part has occurred. 変形例１における管継手のパッキンを示す一部断面図である。FIG. 9 is a partial cross-sectional view showing a pipe joint packing in Modification 1; 変形例２における管継手のパッキンを示す一部断面図である。FIG. 9 is a partial cross-sectional view showing a pipe joint packing according to Modification 2. 変形例３における管継手のパッキンを示す一部断面図である。FIG. 10 is a partial cross-sectional view showing a pipe joint packing according to Modification 3. （ａ）は、パッキン取付け前の従来例の管継手を示す一部断面図である。（ｂ）は、パッキン取付け後の従来例の管継手を示す一部断面図である。(A) is a partial cross section figure which shows the pipe joint of the prior art example before packing installation. (B) is a partial cross section figure which shows the pipe joint of the prior art example after packing installation.

符号の説明Explanation of symbols

１ パッキン
１ａ 押込み部
１ｂ 先頭シール部
１ｃ 被押圧面（押込み部の端面）
１ｄ 外周面（押込み部）
１ｅ 内周面（押込み部）
２ 管体
３ 受口部
３ａ 端面
３ｂ 傾斜面
３ｄ 平行面
３ｆ 奥端面
３ｇ フランジ部
３ｈ 取付孔
９ 第１膨出部
９ａ 第１膨出部
９ｂ 第１膨出部
９ｃ 第１膨出部
９ｄ 第１膨出部
１０ 第２膨出部
１０ｂ 第２膨出部
１０ｃ 第２膨出部
１０ｄ 第２膨出部
１１ Ｔ頭ボルト（取付部材）
１２ ナット（取付部材）
１３ 押輪
１３ａ 環状押圧部
１３ｂ フランジ部
１３ｃ 押圧面
１３ｄ 取付孔
２２ 管体
２３ 挿口部
２３ａ 外周面
Ａ 基準面
Ｂ 直交線
Ｐａ 第１頂部
Ｐｂ 第２頂部 1 Packing 1a Pushing part 1b Lead seal part 1c Pressed surface (end face of pushing part)
1d Outer peripheral surface (push-in part)
1e Inner peripheral surface (push-in part)
2 Tube 3 Receiving portion 3a End surface 3b Inclined surface 3d Parallel surface 3f Deep end surface 3g Flange portion 3h Mounting hole 9 First bulging portion 9a First bulging portion 9b First bulging portion 9c First bulging portion 9d First 1 bulging portion 10 second bulging portion 10b second bulging portion 10c second bulging portion 10d second bulging portion 11 T-head bolt (attachment member)
12 Nut (mounting member)
13 Push ring 13a Annular pressing portion 13b Flange portion 13c Pressing surface 13d Mounting hole 22 Tube 23 Insertion portion 23a Outer peripheral surface A Reference surface B Orthogonal line Pa First apex portion Pb Second apex portion

Claims (3)

一方の管体を構成する挿口部と、
該挿口部に遊挿され、内周面には、端面側から内方に向かって縮径する傾斜面と、該傾斜面に連続して更に内方に向かって形成される管軸に対して略平行の平行面と、を有している他方の管体を構成する受口部と、
リング状に形成される弾性材から成り、前記受口部の内周面と前記挿口部の外周面の間に配置され、前記傾斜面と前記挿口部の外周面との間に位置する押込み部と、該押込み部に連続して形成され、前記平行面と前記挿口部の外周面との間を密封するための先頭シール部と、を有するパッキンと、
前記挿口部の外周面に沿って外嵌されるとともに、前記パッキンの押込み部の端面を管軸方向に押圧する押圧面を有する押輪と、
前記受口部と前記押輪と前記パッキンとの管軸方向の相対移動が規制されるように、前記受口部と前記押輪とを連係して取付けられた取付部材と、を備えた管継手において、
前記パッキンの前記押込み部の外周面に形成された第１膨出部と前記パッキンの前記押込み部の内周面に形成された第２膨出部とからなり、前記第１膨出部は前記押込み部の外周面に対向する前記受口部の傾斜面に向かって膨出し、前記第２膨出部は前記押込み部の内周面に対向する前記挿口部の外周面に向かって膨出し、両膨出部は、周方向に沿って形成されており、前記第２膨出部は、前記第１膨出部から、前記押込み部の外周面の基準面に対し略直角に延びる直交線方向に形成され、該直交線上に、前記第１膨出部における最大膨出点である第１頂部と前記第２膨出部における最大膨出点である第２頂部とが通過するように形成されていることを特徴とする管継手。 An insertion portion constituting one tube,
An inclined surface that is loosely inserted into the insertion portion and has an inner peripheral surface with a diameter that decreases inward from the end surface side, and a tube axis that is formed continuously inward from the inclined surface. A receiving part that constitutes the other tubular body having a substantially parallel parallel plane,
It is made of an elastic material formed in a ring shape, and is disposed between the inner peripheral surface of the receiving portion and the outer peripheral surface of the insertion portion, and is located between the inclined surface and the outer peripheral surface of the insertion portion. A packing having a pushing portion and a leading seal portion formed continuously with the pushing portion for sealing between the parallel surface and the outer peripheral surface of the insertion portion;
A press ring having a pressing surface that is fitted around the outer peripheral surface of the insertion portion and presses the end surface of the pressing portion of the packing in the tube axis direction,
In a pipe joint comprising: an attachment member attached in linkage with the receptacle and the push ring so that relative movement of the receptacle, the push ring, and the packing in the tube axis direction is restricted. ,
The first bulging portion is formed of a first bulging portion formed on an outer peripheral surface of the pushing portion of the packing and a second bulging portion formed on an inner peripheral surface of the pushing portion of the packing. The second bulging portion bulges toward the outer peripheral surface of the insertion portion facing the inner peripheral surface of the pressing portion, and bulges toward the inclined surface of the receiving portion facing the outer peripheral surface of the pressing portion. Both bulging portions are formed along a circumferential direction, and the second bulging portion is orthogonally extending from the first bulging portion at a substantially right angle to a reference surface of the outer peripheral surface of the pushing portion. It is formed in a line direction so that the first top that is the maximum bulge point in the first bulge and the second top that is the maximum bulge in the second bulge pass through the orthogonal line. A pipe joint characterized by being formed . 前記押込み部の外周面と前記押込み部の内周面の少なくとも一方に、前記膨出部が複数条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。 Pipe joint of claim 1, wherein the outer circumferential surface of the pushing portion and at least one of the inner circumferential surface of the pushing portion, wherein the bulged portion is plural rows formed. 前記膨出部は、前記押込み部の端面近傍に形成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 bulging portion, the pipe joint according to claim 1 or 2, characterized in that it is formed in the vicinity of an end face of the pushing portion.
JP2007032635A 2007-02-13 2007-02-13 Pipe fitting Expired - Fee Related JP4949061B2 (en)

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US11204114B2 (en) 2019-11-22 2021-12-21 Trinity Bay Equipment Holdings, LLC Reusable pipe fitting systems and methods

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CN103174889B (en) * 2009-01-27 2015-03-11 株式会社久保田 Pipe joint
JP2011085162A (en) * 2009-10-14 2011-04-28 Kubota Corp Pipe joint
CN105065811B (en) * 2012-06-25 2017-05-24 株式会社久保田 Pressing ring, coupling, and valve
US11384875B2 (en) 2016-03-28 2022-07-12 Kubota Corporation Pipe joint, separation prevention member, and method of connecting pipes
JP6735123B2 (en) * 2016-03-28 2020-08-05 株式会社クボタ Pipe joint and pipe joining method

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JPS6065986A (en) * 1983-09-19 1985-04-15 三菱重工業株式会社 Self-seal type rubber packing for mechanical joint
JPH10132167A (en) * 1996-10-24 1998-05-22 Hitachi Metals Ltd Packing type pipe joint
JP2001295968A (en) * 2000-04-14 2001-10-26 Sadayoshi Yamazaki Method of sealing k-type pipe joint, and related member thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11204114B2 (en) 2019-11-22 2021-12-21 Trinity Bay Equipment Holdings, LLC Reusable pipe fitting systems and methods

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