JPH08226582A - Double press type fitting - Google Patents
Double press type fittingInfo
- Publication number
- JPH08226582A JPH08226582A JP7056599A JP5659995A JPH08226582A JP H08226582 A JPH08226582 A JP H08226582A JP 7056599 A JP7056599 A JP 7056599A JP 5659995 A JP5659995 A JP 5659995A JP H08226582 A JPH08226582 A JP H08226582A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- annular groove
- socket
- connecting pipe
- press type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
- F16L13/148—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling specially designed to ensure an intended leakage until correct deformation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Gasket Seals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、スリーブ、エルボ、テ
ィー、レデューサー等に成形された継手管のソケット部
に、接続管を差し込んで２ヶ所同時に締付けて接続する
ダブルプレス式管継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-press type pipe joint in which a connecting pipe is inserted into a socket portion of a joint pipe formed in a sleeve, an elbow, a tee, a reducer or the like and simultaneously tightened at two positions.
【０００２】[0002]
【従来の技術】従来より継手管のソケット部に接続管を
差し込んで、締付け接続するプレス式管継手としては、
特開昭５３−７００７２号公報に記載のものがある。こ
のプレス式管継手は、図６に示すように継手管１のソケ
ット部２の受口内面に環状溝３を設け、この環状溝３内
にＯリング４を装着し、ソケット部２内に接続管５を差
し込み、上下割型状のプレス工具７，７′を用い、外周
面から図７に示すように圧縮し、縮径してソケット部２
の一部を接続管５に圧着すると共に環状溝３の部分も加
圧してＯリング４を接続管５の外周面に喰い込み状態に
圧着し、接続部の耐圧性を増強させ、且つ受口部の完全
気密性を保持し、流体の漏洩を完璧に阻止するものであ
る。2. Description of the Related Art Conventionally, as a press-type pipe joint in which a connecting pipe is inserted into a socket portion of a joint pipe and tightened for connection,
There is one described in JP-A-53-70072. As shown in FIG. 6, this press type pipe joint is provided with an annular groove 3 on the inner surface of the socket of the socket portion 2 of the joint pipe 1, and an O-ring 4 is mounted in the annular groove 3 to connect to the inside of the socket portion 2. Insert the tube 5 and use the upper and lower split type press tools 7, 7'to compress the outer peripheral surface as shown in FIG.
Part of the O-ring 4 is pressure-bonded to the connecting pipe 5 and the annular groove 3 is also pressed to press the O-ring 4 to the outer peripheral surface of the connecting pipe 5 to increase the pressure resistance of the connecting portion and It keeps the part completely airtight and completely prevents fluid leakage.
【０００３】ところで、このプレス式管継手におけるＯ
リング４は、プレス工具７，７′による加圧の前後にわ
たって２段階の潰し代が設定され、Ｏリング４は加圧後
だけでなく加圧前においても環状溝３と接続管５とに挾
まれて、ある程度のシール作用を奏するようになってい
る。従って、配管施工時に作業者が接続部をプレス工具
７，７′による締め付けを失念すると、その後の水圧試
験時に漏水が無い為に施工上の不具合を検知できないこ
ととなり、これに伴って実働時に大事故が生じる虞れが
ある。上記Ｏリング４を用いて施工上の不具合を検知す
るにはプレス工具による加圧前の段階でＯリング４を非
圧縮として遊ばせておけば良い訳であるが、このように
すると継手管１と接続管５が径方向にガタついて両管を
しっかりと位置決めすることができない問題が生じる。By the way, O in this press type pipe joint
The ring 4 has a two-stage crushing margin set before and after pressurization by the press tools 7 and 7 ′, and the O-ring 4 sandwiches the annular groove 3 and the connecting pipe 5 not only after pressurization but also before pressurization. It has a sealing effect to some extent. Therefore, if the worker forgets to tighten the connection part with the press tools 7 and 7'during pipe installation, it will not be possible to detect a construction failure because there will be no water leakage during the subsequent hydraulic pressure test. An accident may occur. In order to detect a construction defect using the O-ring 4, it suffices to let the O-ring 4 play as a non-compressed state before pressurizing with the press tool. There is a problem that the connecting pipe 5 rattles in the radial direction and the two pipes cannot be firmly positioned.
【０００４】このようなことから上記プレス式管継手の
Ｏリングに施工上の不具合を検知する機能を持たせたも
のとして、実公平６−３３２５８号公報に記載のパッキ
ン（Ｏリング）を開発した。このＯリングは、図８に示
すように内周縁及び外周縁の一部に凹部８とその両側で
凸部９を設けたもので、このＯリング１０を図９に示す
ように継手管１のソケット部２の受口内面の環状溝３内
に装着し、ソケット部２内に接続管５を差し込むと、Ｏ
リング１０の内周縁及び外周縁凸部９が圧潰され、凹部
８と接続管５の外周面及び環状溝３の底との間に間隙流
路１１，１２が形成される。従って、プレス工具による
ソケット部２、接続管５の締め忘れがあっても水圧（空
圧）試験の際、間隙流路１１，１２からの水（空気）漏
れを発見でき、安全な配管ができる。Under the circumstances, the packing (O-ring) described in Japanese Utility Model Publication No. 6-33258 has been developed as an O-ring of the above-mentioned press type pipe joint having a function of detecting a construction defect. . As shown in FIG. 8, this O-ring is provided with a concave portion 8 and convex portions 9 on both sides of the inner peripheral edge and the outer peripheral edge, and this O-ring 10 is provided on the joint pipe 1 as shown in FIG. When it is mounted in the annular groove 3 on the inner surface of the socket of the socket 2 and the connecting pipe 5 is inserted into the socket 2, O
The inner peripheral edge and the outer peripheral edge convex portion 9 of the ring 10 are crushed, and gap flow paths 11 and 12 are formed between the concave portion 8 and the outer peripheral surface of the connecting pipe 5 and the bottom of the annular groove 3. Therefore, even if the socket portion 2 and the connection pipe 5 are forgotten to be tightened by the press tool, water (air) leakage from the gap flow passages 11 and 12 can be found during a water pressure (air pressure) test, and safe piping can be performed. .
【０００５】ところで、前記したプレス式管継手の継手
管１は、受口内面に環状溝３が設けられているので、ソ
ケット部２と接続管５の締め付け接続個所は１ヶ所であ
り、接続管５の差し込みが締め付け個所まで到達してい
ないと、締め付けが行われても実働時接続管５がすっぽ
抜けるし、また接続管５の差し込みが適正に行われても
締め付け接続個所が１ヶ所では強度が十分とは言い難
く、振動等によりゆるみが生じることがある。By the way, in the joint pipe 1 of the above-mentioned press type pipe joint, since the annular groove 3 is provided on the inner surface of the receiving port, the socket portion 2 and the connecting pipe 5 have only one tightening connection point. If the insertion of 5 does not reach the tightening point, the connecting tube 5 will slip out during actual operation even if tightening is performed, and even if the connecting tube 5 is properly inserted, there is only one tightening connecting point. It is difficult to say that the strength is sufficient, and loosening may occur due to vibration or the like.
【０００６】[0006]
【発明が解決しようとする課題】そこで本発明は、ソケ
ット部と接続管の締め付け接続個所をＯリングの両側方
の２ヶ所とし、配管施工時ソケット部と接続管の締め忘
れがあった場合、水圧（空圧）試験において圧力２０ｋ
ｇｆ／ｃｍ2 （最高試験圧力１７．５ｋｇｆ／ｃｍ2 ）
まで上昇させてもＯリングが環状溝内でソケット部の開
口端側にスライドせず、変形もせず、Ｏリングの凹部に
よって形成されていた間隙流路が消滅せず、従って水
（空気）漏れが発生し、締め忘れを確実に発見できるよ
うにしたダブルプレス式管継手を提供しようとするもの
である。SUMMARY OF THE INVENTION In view of the above, according to the present invention, when the socket portion and the connecting pipe are fastened to each other at two locations on both sides of the O-ring, when the socket portion and the connecting pipe are forgotten to be tightened during pipe construction, 20k pressure in water pressure test
gf / cm 2 (maximum test pressure 17.5 kgf / cm 2 )
The O-ring does not slide toward the opening end side of the socket in the annular groove and does not deform even when it is raised to the upper side, and the gap flow path formed by the recess of the O-ring does not disappear, and therefore water (air) leaks. The present invention aims to provide a double-press type pipe joint that can surely detect that tightening has been forgotten.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
の本発明のダブルプレス式管継手は、継手管のソケット
部の途中の内周側に外方に膨出する環状溝が設けられ、
該環状溝内にＯリングが装着され、該Ｏリングは外径が
環状溝の底の内径と略同径に、内径がソケット部に差し
込まれる接続管の外径と略同径になされると共に、外周
縁と内周縁の一部に、環状溝の底との間及び差し込まれ
る接続管の外面との間に間隙流路が形成される凹部と、
その両側で環状溝内への装着によって圧潰及び差し込ま
れる接続管によって圧潰される凸部が設けられ、且つそ
の凸部の断面外側形状が環状溝の断面内側形状に沿うよ
うに略三角形になされ、ソケット部と接続管とがＯリン
グの両側方２ヶ所でプレス工具により同時に締め付け接
続された際、前記間隙流路が消滅するようになされてい
ることを特徴とするものである。A double press type pipe joint of the present invention for solving the above problems is provided with an annular groove bulging outward on the inner peripheral side in the middle of the socket portion of the joint pipe.
An O-ring is mounted in the annular groove, and the O-ring has an outer diameter approximately the same as the inner diameter of the bottom of the annular groove and an inner diameter approximately the same as the outer diameter of the connecting pipe inserted into the socket portion. A concave portion in which a gap flow path is formed between the outer peripheral edge and a part of the inner peripheral edge between the bottom of the annular groove and the outer surface of the inserted connecting pipe,
Protrusions are provided on both sides thereof that are crushed by the fitting into the annular groove and crushed by the connecting pipe inserted, and the cross-sectional outer shape of the convex portion is formed into a substantially triangular shape so as to follow the cross-sectional inner shape of the annular groove, It is characterized in that when the socket part and the connecting pipe are simultaneously tightened and connected at two positions on both sides of the O-ring by a press tool, the gap flow path disappears.
【０００８】かかる構成のダブルプレス式管継手に於い
て、環状溝からソケット部開口端までの内径は、環状溝
からソケット部奥端までの内径よりも僅かに大きくなさ
れていることが好ましい。その理由は環状溝からソケッ
ト部開口端までの内径と環状溝からソケット部奥端まで
の内径とが等しいと、内外周の一部に凹凸部を設けたＯ
リングを適正に装着するために環状溝の外径を大きくし
た場合、環状溝の外方突出部の高さが高くなって、プレ
ス工具によりＯリングの両側方２ヶ所を締め付け接続し
た際、Ｏリングが適正に締め付けられずシール性が低下
するので、環状溝の外径を大きくしても環状溝の外方突
出部の高さを低くするためである。In the double press type pipe joint having such a structure, it is preferable that the inner diameter from the annular groove to the opening end of the socket is slightly larger than the inner diameter from the annular groove to the inner end of the socket. The reason is that if the inner diameter from the annular groove to the opening end of the socket is equal to the inner diameter from the annular groove to the rear end of the socket, an uneven portion is formed on a part of the inner and outer circumferences.
When the outer diameter of the annular groove is increased in order to properly mount the ring, the height of the outward protruding portion of the annular groove becomes high, and when the two sides of the O ring are tightened and connected by the press tool, the O This is because the ring is not properly tightened and the sealing performance is deteriorated, so that the height of the outward protruding portion of the annular groove is reduced even if the outer diameter of the annular groove is increased.
【０００９】上記構成のダブルプレス式管継手に於い
て、環状溝のソケット部開口端側の側縁のアールは小さ
くなされていることが好ましい。その理由は、プレス工
具による締め付けを忘れた時の水圧（空圧）試験におい
て、Ｏリングの移動を少なくするためである。In the double press type pipe joint having the above construction, it is preferable that the radius of the side edge of the annular groove on the opening end side of the socket is small. The reason is to reduce the movement of the O-ring in a water pressure (air pressure) test when the tightening by the press tool is forgotten.
【００１０】[0010]
【作用】上述のように構成されたダブルプレス式管継手
は、ソケット部の環状溝に外周縁を密着して装着された
Ｏリングの外周縁の一部の凸部が圧潰されるが、その凸
部間の凹部により環状溝の底との間に間隙流路が形成さ
れており、配管施工時、ソケット部に接続管を奥端まで
差し込むと、Ｏリングの内周縁の一部の凸部が圧潰され
るが、その凸部間の凹部により接続管の外面との間に間
隙流路が形成される。そしてソケット部と接続管とを、
Ｏリングの両側方２ヶ所でプレス工具により同時に締め
付け接続すると、環状溝の部分も加圧圧縮されてＯリン
グが接続管の外周面に喰い込み状態に圧着されて前記間
隙流路が消滅し、接続部の完全気密性が達成されて、流
体の漏洩が完璧に阻止される。と同時にプレス工具によ
る締め付け接続個所がＯリングの両側方２ヶ所であるの
で、接続部の強度が万全となって振動等によりゆるみが
生じることが無くなり、しかも万が一ソケット部に対す
る接続管の差し込み不足があってもＯリングを貫通して
いれば必ず１ヶ所ではソケット部と接続管が締め付け接
続されるので、流体の漏洩を確実に防止できる。In the double-press type pipe joint constructed as described above, a part of the convex portion of the outer peripheral edge of the O-ring, which is mounted by closely fitting the outer peripheral edge to the annular groove of the socket portion, is crushed. A gap flow path is formed between the concave portion between the convex portions and the bottom of the annular groove, and when the connecting pipe is inserted into the socket portion to the innermost end during the pipe construction, the convex portion of the inner peripheral edge of the O-ring is partially formed. Is crushed, but a gap flow path is formed between the convex portion and the outer surface of the connecting pipe due to the concave portion between the convex portions. And the socket part and the connecting pipe,
If the press-tools are simultaneously tightened and connected at two locations on both sides of the O-ring, the annular groove portion is also pressed and compressed, and the O-ring is pressed into the outer peripheral surface of the connecting pipe so as to be crimped so that the gap passage disappears. Full tightness of the connection is achieved and leakage of fluid is completely prevented. At the same time, since there are two places on both sides of the O-ring that can be tightened by the press tool, the strength of the connecting part is perfect and the loosening due to vibration etc. does not occur. Even if there is, the socket part and the connection pipe are tightened and connected at one place as long as they penetrate the O-ring, so that fluid leakage can be reliably prevented.
【００１１】然して配管施工後、水圧（空圧）試験を行
ってダブルプレス式管継手のシール検査を行うと、上記
のように完全に締め付け接続されたソケット部と接続管
は水（空気）漏れしないが、万が一締め忘れ、接続管の
差し込み不足等の不備があった場合には、Ｏリングの外
周縁及び内周縁の一部の凹部によって形成された間隙流
路を通って水（空気）が漏れるので、配管接続の不備を
発見でき、完全な配管を行うことができる。上記の水圧
（空圧）試験において、試験圧力が高くなっても、Ｏリ
ングに設けられた凸部の断面外側形状が環状溝の断面内
側形状に沿うように略三角形状になされて、その略三角
形状の凸部の両側の張出部が環状溝の開口両側縁部に係
合しているので、締め忘れのダブルプレス式管継手にお
けるＯリングの凹凸部は環状溝内でソケット部の開口端
側にスライドせず、変形もしない。従って、Ｏリングの
凹部によって形成されていた間隙流路が消滅しないの
で、水（空気）漏れが発生し、締め忘れを確実に発見で
きる。However, after the pipe construction, a water pressure (air pressure) test is carried out and a seal inspection of the double press type pipe joint is conducted. As a result, the socket portion and the connection pipe which are completely tightened and connected as described above leak water (air). However, in the unlikely event that you forget to tighten it and there is a defect such as insufficient insertion of the connecting pipe, water (air) will pass through the gap flow path formed by the concave part of the outer peripheral edge and the inner peripheral edge of the O-ring. Leakage allows you to find inadequate plumbing connections and complete plumbing. In the above-mentioned water pressure (air pressure) test, even if the test pressure becomes high, the cross-sectional outer shape of the convex portion provided on the O-ring is formed into a substantially triangular shape so as to follow the cross-sectional inner shape of the annular groove. Since the projecting parts on both sides of the triangular convex part engage with both side edges of the opening of the annular groove, the uneven part of the O-ring in the double-press type pipe joint that has been forgotten to be tightened is the opening of the socket part in the annular groove. It does not slide to the end and does not deform. Therefore, the gap flow path formed by the recess of the O-ring does not disappear, so that water (air) leakage occurs, and forgetting to tighten can be surely found.
【００１２】また、本発明のダブルプレス式管継手に於
いて、環状溝からソケット部開口端までの内径を、環状
溝からソケット部奥端までの内径よりも僅かに大きくし
てある場合は、内外周の一部に凹凸部を設けたＯリング
を適正に装着するために環状溝の外径を大きくした場合
でも環状溝の外方膨出部の高さが高くならず、従って、
プレス工具によりＯリングの両側方２ヶ所を締め付け接
続した際、環状溝の外方膨出部と共にＯリングが適正に
締め付けられ、シール性が向上する。しかも接続管がソ
ケット部に差し込み易くなる。さらに本発明のダブルプ
レス式管継手に於いて、環状溝のソケット部開口端側の
側縁のアールを小さくしてある場合は、プレス工具によ
る締め付けを忘れた時の水圧（空圧）試験において、Ｏ
リングの移動を少なくできる。Further, in the double press type pipe joint of the present invention, when the inner diameter from the annular groove to the socket opening end is slightly larger than the inner diameter from the annular groove to the socket inner end, Even if the outer diameter of the annular groove is increased in order to properly mount the O-ring having the uneven portion on the inner and outer circumferences, the height of the outward bulging portion of the annular groove does not increase, and therefore,
When two places on both sides of the O-ring are tightened and connected by a press tool, the O-ring is properly tightened together with the outward bulging portion of the annular groove, and the sealing property is improved. Moreover, the connecting pipe can be easily inserted into the socket. Furthermore, in the double press type pipe joint of the present invention, in the case where the radius of the side edge of the annular groove on the opening end side of the socket is made small, in a hydraulic (pneumatic) test when forgetting to tighten with a press tool , O
The movement of the ring can be reduced.
【００１３】[0013]
【実施例】本発明のダブルプレス式管継手の一実施例を
図によって説明すると、図１のａに示すようにスリーブ
型の継手管１のソケット部２の途中の内周側に外方に膨
出する環状溝３を設け、この環状溝３内にゴム製のＯリ
ング１３を装着している。このＯリング１３は、ゴム硬
度Ｈｓ８７で、外径が環状溝３の底の内径と略同径に、
内径がソケット部２に差し込まれる後述の接続管の外径
と略同径になされていて、外周縁と内周縁の一部に、図
２に示すように凹部１４，１５が設けられ、その凹部１
４，１５の両側で夫々凸部１６，１７が設けられてい
る。凹部１４は図１のａおよびｂに示されるように環状
溝３の底との間に間隙流路１８を形成しており、凹部１
５はソケット部２に差し込まれる後述の接続管の外面と
の間に間隙流路を形成するものである。凹部１４の両側
の凸部１６は、Ｏリング１３の環状溝３内への装着によ
って圧潰されてＯリング１３の外径と等しくなってい
て、凹部１５の両側の凸部１７はソケット部２に差し込
まれる後述の接続管によって圧潰されてＯリング１３の
内径と等しくなるものである。また前記凸部１６，１７
の断面外側形状が、図３に示すように環状溝３の断面内
側形状に沿うように略三角形状になされている。そして
ソケット部２とこれに差し込まれる接続管とがＯリング
１３の両側方２ヶ所でプレスにより同時に締め付け縮径
されて接続された際、環状溝３の部分も外方から加圧圧
縮されてＯリング１３が圧着され、凹部１４，１５が無
くなり、間隙流路が消滅するようになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the double press type pipe joint of the present invention will be described with reference to the drawing. As shown in FIG. A bulging annular groove 3 is provided, and a rubber O-ring 13 is mounted in the annular groove 3. The O-ring 13 has a rubber hardness Hs87 and an outer diameter substantially equal to the inner diameter of the bottom of the annular groove 3,
The inner diameter is made substantially the same as the outer diameter of a connecting pipe to be described later to be inserted into the socket portion 2, and recesses 14 and 15 are provided in a part of the outer peripheral edge and the inner peripheral edge as shown in FIG. 1
Protrusions 16 and 17 are provided on both sides of 4 and 15, respectively. The recess 14 forms a gap flow path 18 between itself and the bottom of the annular groove 3 as shown in FIGS.
Reference numeral 5 forms a gap flow path with the outer surface of a connection pipe which will be described later and is inserted into the socket portion 2. The protrusions 16 on both sides of the recess 14 are crushed by the mounting of the O-ring 13 in the annular groove 3 to have the same outer diameter as the O-ring 13, and the protrusions 17 on both sides of the recess 15 are connected to the socket 2. The inner diameter of the O-ring 13 is equalized by being crushed by a connecting pipe which will be described later. In addition, the convex portions 16 and 17
The outer shape of the cross-section is substantially triangular so as to follow the inner shape of the cross-section of the annular groove 3 as shown in FIG. When the socket portion 2 and the connecting pipe to be inserted into the socket portion 2 are connected at the two locations on both sides of the O-ring 13 by being simultaneously tightened and reduced in diameter by a press, the portion of the annular groove 3 is also pressed and compressed from the outside. The ring 13 is pressure-bonded, the concave portions 14 and 15 are eliminated, and the gap flow path is eliminated.
【００１４】かかる構成のダブルプレス式管継手に於い
て、環状溝３からソケット部２の開口端までの内径は、
図１のａに示すように環状溝３からソケット部２の奥端
までの内径よりも僅かに大きくなされていることが好ま
しい。また、環状溝３のソケット２の開口端側の側縁の
アールＲ1 は小さいことが好ましい。In the double press type pipe joint having the above structure, the inner diameter from the annular groove 3 to the opening end of the socket 2 is
As shown in a of FIG. 1, it is preferable that the inner diameter from the annular groove 3 to the inner end of the socket portion 2 is slightly larger. Further, the radius R 1 of the side edge of the annular groove 3 on the opening end side of the socket 2 is preferably small.
【００１５】次に前記のように構成された実施例のダブ
ルプレス式管継手の使用態様について説明する。図１の
ａに示すように継手管１のソケット部２の環状溝３に装
着されたＯリング１３は、外周縁の一部の２つの凸部１
６が圧潰されるが、その２つの凸部１６間の凹部１４に
より図１のｂに示すように環状溝３の底との間に間隙流
路１８が形成されており、配管施工時、ソケット部２に
図４のａに示すように接続管１９を奥端まで差し込む
と、Ｏリング１３の内周縁の一部の２つの凸部１７が圧
潰されるが、その２つの凸部１７間の凹部１５により図
４のｂに示すように接続管１９の外面との間に間隙流路
２０が形成される。この状態において、作業員がソケッ
ト部２と接続管１９とを、図５のａに示すようにＯリン
グ１３の両側方２ヶ所でプレス工具（図示せず）により
同時に締め付け縮径して接続すると、環状溝３の部分も
外方から加圧圧縮されて図５のｂに示すようにＯリング
１３の凹部１４，１５が無くなり、前記間隙流路１８，
２０が消滅し、接続部の完全気密性が達成されて、流体
の漏洩が完璧に阻止される。Next, a usage mode of the double press type pipe joint of the embodiment constructed as described above will be explained. As shown in FIG. 1A, the O-ring 13 mounted in the annular groove 3 of the socket portion 2 of the joint pipe 1 has two convex portions 1 at a part of the outer peripheral edge.
6 is crushed, but the recess 14 between the two protrusions 16 forms a gap flow path 18 between itself and the bottom of the annular groove 3 as shown in FIG. When the connecting pipe 19 is inserted into the portion 2 as shown in FIG. 4A, the two convex portions 17 at a part of the inner peripheral edge of the O-ring 13 are crushed, but between the two convex portions 17. The recess 15 forms a gap flow path 20 between the recess 15 and the outer surface of the connecting pipe 19, as shown in FIG. In this state, when the worker connects the socket portion 2 and the connecting pipe 19 to each other by simultaneously tightening and reducing the diameter by using a press tool (not shown) at two places on both sides of the O-ring 13 as shown in FIG. The annular groove 3 is also pressed and compressed from the outside to eliminate the recesses 14 and 15 of the O-ring 13 as shown in FIG.
20 disappears and a complete airtightness of the connection is achieved and fluid leakage is completely prevented.
【００１６】と同時にプレス工具による締め付け接続個
所が、Ｏリング１３の両側方２ヶ所であるので、接続部
の強度が万全となって振動等によりゆるみが生じること
が無くなり、しかも万が一ソケット部２に対する接続管
１９の差し込み不足があってもＯリング１３を貫通して
いれば、必ず１ヶ所ではソケット部２と接続管１９が締
め付け接続されるので、流体の漏洩を確実に防止でき
る。At the same time, since there are two places to be tightened by the press tool on both sides of the O-ring 13, the strength of the connecting portion is perfect and the loosening due to vibration or the like does not occur. Even if the connecting pipe 19 is not fully inserted, as long as it penetrates the O-ring 13, the socket portion 2 and the connecting pipe 19 are securely connected at one place, so that fluid leakage can be reliably prevented.
【００１７】こうして配管接続後、水圧（空圧）試験を
行って、シール検査を行うと、上記のように完全に締め
付け接続されたソケット部２と接続管１９は、水（空
気）漏れしないが、万が一締め忘れ、接続管１９の差し
込み不足等があった場合には、図４のａ，ｂに示される
ようにＯリング１３の外周縁及び内周縁の一部の凹部１
４，１５によって形成された間隙流路１８，２０を通っ
て水（空気）が漏れるので、配管接続の不備を発見で
き、完全な配管を行うことができる。After connecting the pipes in this way, a water pressure (air pressure) test is carried out, and a seal inspection is carried out. However, the socket portion 2 and the connection pipe 19 which are completely tightened and connected as described above do not leak water (air). In the unlikely event that the connection pipe 19 is insufficiently inserted and the insertion of the connection pipe 19 is insufficient, the recesses 1 at the outer and inner peripheral edges of the O-ring 13 are partially formed as shown in FIGS.
Since water (air) leaks through the interstitial flow paths 18 and 20 formed by 4 and 15, it is possible to find a defective pipe connection and complete piping.
【００１８】この水圧（空圧）試験において、試験圧力
（最高試験圧力１７．５ｋｇｆ／ｃｍ2 ）を２０ｋｇｆ
／ｃｍ2 まで上昇させても、図２、図３に示すようにＯ
リング１３に設けられた凸部１６，１７の断面外側形状
が環状溝３の断面内側形状に沿うように略三角形になさ
れて、その略三角形状の凸部１６，１７の両側の張出部
２１が図４のａに示すように環状溝３の開口両側縁部２
２に係合しているので、締め忘れのダブルプレス式管継
手におけるＯリング１３の凹凸部は、環状溝３内でソケ
ット部２の開口端側にスライドせず、変形もしない。従
って、Ｏリング１３の凹部１４，１５によって形成され
ていた間隙流路１８，２０が消滅しないので、水（空
気）漏れが発生し、締め忘れを確実に発見できる。In this hydraulic (pneumatic) test, the test pressure (maximum test pressure 17.5 kgf / cm 2 ) was 20 kgf.
As shown in FIGS. 2 and 3, even if the pressure is increased to / cm 2
The cross-sectional outer shape of the convex portions 16 and 17 provided on the ring 13 is formed into a substantially triangular shape so as to follow the cross-sectional inner shape of the annular groove 3, and the protruding portions 21 on both sides of the substantially triangular convex portions 16 and 17 are formed. As shown in FIG. 4a, the both side edge portions 2 of the opening of the annular groove 3
Since it engages with No. 2, the concavo-convex portion of the O-ring 13 in the double-press type pipe joint that has not been tightened does not slide to the opening end side of the socket portion 2 in the annular groove 3 and is not deformed. Therefore, since the gap flow paths 18 and 20 formed by the recesses 14 and 15 of the O-ring 13 do not disappear, water (air) leakage occurs, and it is possible to reliably find that tightening has been forgotten.
【００１９】また、上記実施例のダブルプレス式管継手
においては、図１のａに示されるように環状溝３からソ
ケット部２の開口端までの内径を、環状溝３からソケッ
ト部２の奥端までの内径よりも僅かに大きくしているの
で、内外周の一部に凹凸部を設けたＯリング１３を適正
に装着するために環状溝３の外径を大きくしていても環
状溝３の外方膨出部の高さは高くならず、従って、プレ
ス工具により図５のａ，ｂに示すようにＯリング１３の
両側２ヶ所を締め付け接続した際、環状溝３の外方膨出
部と共にＯリング１３が適正に締め付けられ、シール性
が向上する。しかも接続管１９をソケット部２に差し込
み易くなる。さらに、上記実施例のダブルプレス式管継
手においては、図１のａに示すように環状溝３のソケッ
ト部２の開口端側の側縁のアールＲ1 を小さくしてある
ので、プレス工具による締め付けを忘れた時の水圧（空
圧）試験において、Ｏリング１３の移動を少なくでき
る。In the double-press type pipe joint of the above embodiment, the inner diameter from the annular groove 3 to the opening end of the socket portion 2 is set to be the inner diameter of the annular groove 3 from the inner side of the socket portion 2 as shown in FIG. Since the inner diameter up to the end is made slightly larger, even if the outer diameter of the annular groove 3 is made large in order to properly mount the O-ring 13 having the uneven portion on the inner and outer circumferences, the annular groove 3 The height of the outward bulging portion of the O-ring 13 does not increase, and therefore when the two sides of the O-ring 13 are tightened and connected by the press tool as shown in FIGS. The O-ring 13 is properly tightened together with the portion, and the sealing property is improved. Moreover, it becomes easy to insert the connecting pipe 19 into the socket 2. Further, in the double press type pipe joint of the above-mentioned embodiment, the radius R 1 of the side edge on the opening end side of the socket portion 2 of the annular groove 3 is made small as shown in FIG. It is possible to reduce the movement of the O-ring 13 in a water pressure (air pressure) test when forgetting to tighten.
【００２０】[0020]
【発明の効果】以上の説明で判るように本発明のダブル
プレス式管継手は、ソケット部と接続管の締め付け接続
個所をＯリングの両側方２ヶ所としているので、接続部
の強度が万全となって、振動等によりゆるみが生じるこ
とが無くなり、しかも万が一ソケット部に対する差し込
み不足があってもＯリングを貫通していれば必ず１ヶ所
ではソケット部と接続管が締め付け接続されるので、流
体の漏洩が無い。また、配管施工後、水圧（空圧）試験
による接続部のシール検査を行うと、万が一締め忘れ、
接続管の差し込み不足等の不備があった場合には、Ｏリ
ングの外周縁及び内周縁の一部の凹部によって形成され
た間隙流路を通って水が漏れるので、配管接続の不備を
発見でき、完全な配管を行うことができる。しかもこの
水圧（空圧）試験において、試験圧力が極端に高くなっ
ても締め忘れのダブルプレス式管継手におけるＯリング
は凹部両側の凸部における張出部の存在によって環状溝
内でソケット部開口端側にスライドせず、変形もしない
ので、Ｏリングの凹部によって形成されていた間隙流路
は消滅しないので、水（空気）漏れが発生し、締め忘れ
を確実に発見できる。As can be seen from the above description, in the double press type pipe joint of the present invention, the tightening connection points of the socket portion and the connecting pipe are two on both sides of the O-ring, so that the strength of the connecting portion is perfect. As a result, loosening due to vibration, etc. will not occur, and even if there is insufficient insertion into the socket part, the socket part and the connecting pipe will always be tightened and connected at one place if the O-ring is penetrated. There is no leakage. Also, after pipe installation, if you perform a seal inspection of the connection part by a water pressure (air pressure) test, you should forget to tighten it by any chance.
If there is a defect such as insufficient insertion of the connecting pipe, water leaks through the gap flow path formed by the concave part of the outer and inner peripheral edges of the O-ring, so the defect in the pipe connection can be found. , Complete plumbing can be done. Moreover, in this hydraulic (pneumatic) test, the O-ring in the double-press type pipe joint, which was forgotten to tighten even if the test pressure became extremely high, caused the opening of the socket in the annular groove due to the presence of the protrusions on both sides of the recess. Since it does not slide to the end side and does not deform, the gap flow path formed by the concave portion of the O-ring does not disappear, so that water (air) leakage occurs and it is possible to surely find that tightening is forgotten.
【図１】本発明のダブルプレス式管継手の一実施例を示
すもので、ａは縦断面図、ｂはａ図のＡ−Ａ線断面矢視
図である。FIG. 1 shows an embodiment of a double press type pipe joint of the present invention, in which a is a longitudinal sectional view and b is a sectional view taken along the line AA of FIG.
【図２】図１のダブルプレス式管継手に於けるＯリング
を示す図である。FIG. 2 is a view showing an O-ring in the double press type pipe joint of FIG.
【図３】図２のＢ−Ｂ線断面図である。FIG. 3 is a sectional view taken along line BB of FIG.
【図４】図１のダブルプレス式管継手のソケット部に接
続管を差し込んだ状態を示すもので、ａは縦断面図、ｂ
はａ図のＣ−Ｃ線断面矢視図である。FIG. 4 shows a state in which a connecting pipe is inserted into the socket portion of the double press type pipe joint of FIG. 1, a is a longitudinal sectional view, and b
[Fig. 3] is a sectional view taken along the line CC of Fig. A.
【図５】図４のダブルプレス式管継手のソケット部に差
し込んだ接続管をＯリングの両側方２ヶ所で締め付け接
続した状態を示すもので、ａは縦断面図、ｂはＤ−Ｄ線
断面矢視図である。5 shows a state in which the connecting pipe inserted into the socket portion of the double press type pipe joint of FIG. 4 is tightened and connected at two places on both sides of the O-ring, a is a longitudinal sectional view, and b is a DD line. FIG.
【図６】従来のプレス式管継手のソケット部に接続管を
差し込んだ状態を示す図である。FIG. 6 is a view showing a state in which a connection pipe is inserted into a socket portion of a conventional press type pipe joint.
【図７】図６のプレス式管継手のソケット部に差し込ん
だ接続管を締め付け接続した状態を示す図である。7 is a view showing a state in which a connecting pipe inserted into a socket portion of the press type pipe joint of FIG. 6 is tightened and connected.
【図８】図６のプレス式管継手におけるＯリングを改良
したＯリングを示す図である。FIG. 8 is a view showing an O-ring obtained by improving the O-ring in the press type pipe joint of FIG.
【図９】図８のＯリングを装着したプレス式管継手のソ
ケット部に接続管を差し込んだ状態を示す図である。9 is a view showing a state in which a connection pipe is inserted into a socket portion of a press type pipe joint equipped with the O-ring shown in FIG.
１ 継手管 ２ ソケット部 ３ 環状溝 １３ Ｏリング １４ 外周縁の凹部 １５ 内周縁の凹部 １６ 外周縁の凸部 １７ 内周縁の凸部 １８ 凹部１４と環状溝３の底との間の間隙流路 １９ 接続管 ２０ 凹部１５と接続管１９の外面との間の間隙流路 ２１ 張出部 ２２ 環状溝の開口縁両側部 DESCRIPTION OF SYMBOLS 1 Joint tube 2 Socket part 3 Annular groove 13 O-ring 14 Recessed part of outer peripheral edge 15 Recessed part of inner peripheral edge 16 Convex part of outer peripheral edge 17 Convex part of inner peripheral edge 18 Gap passage between recessed part 14 and bottom of annular groove 3 19 connecting pipe 20 gap channel between recess 15 and outer surface of connecting pipe 19 overhanging portion 22 both sides of opening edge of annular groove
───────────────────────────────────────────────────── フロントページの続き (72)発明者 丸橋 康美 東京都大田区山王２丁目５番13号 株式会 社ベンカン内 (72)発明者 元田 光昭 東京都大田区山王２丁目５番13号 株式会 社ベンカン内 (72)発明者 篠田 昭 東京都大田区山王２丁目５番13号 株式会 社ベンカン内 (72)発明者 占部 良雄 東京都大田区山王２丁目５番13号 株式会 社ベンカン内 (72)発明者 石川 政和 東京都大田区山王２丁目５番13号 株式会 社ベンカン内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasumi Maruhashi 2-5-13 Sanno, Ota-ku, Tokyo Within Benkan Co., Ltd. (72) Inventor Mitsuaki Motoda 2-5-13 Sanno, Ota-ku, Tokyo Stocks Company Benkan (72) Inventor Akira Shinoda 2-5-13 Sanno, Ota-ku, Tokyo Benkan Stock Company (72) Inventor Yoshio Urabe 2-5-13 Sanno, Ota-ku, Tokyo Benkan Stock Company (72) Inventor Masakazu Ishikawa 2-5-13 Sanno, Ota-ku, Tokyo Within Benkan Co., Ltd.
Claims (3)
方に膨出する環状溝が設けられ、該環状溝内にはＯリン
グが装着され、該Ｏリングは外径が環状溝の底の内径と
略同径に、内径がソケット部に差し込まれる接続管の外
径と略同径になされると共に、外周縁と内周縁の一部
に、環状溝の底との間及び差し込まれる接続管の外面と
の間に間隙流路が形成される凹部と、その両側で環状溝
内への装着によって圧潰及び差し込まれる接続管によっ
て圧潰される凸部が設けられ、且つその凸部の断面外側
形状が環状溝の断面内側形状に沿うように略三角形状に
なされ、ソケット部と接続管とがＯリングの両側方２ヶ
所でプレス工具により同時に締め付け接続された際、前
記間隙流路が消滅するようになされていることを特徴と
するダブルプレス式管継手。1. An annular groove that bulges outward is provided on the inner peripheral side in the middle of a socket portion of a joint pipe, and an O-ring is mounted in the annular groove, and the O-ring has an outer diameter of the annular groove. The inner diameter is made to be approximately the same as the inner diameter of the bottom of the socket, and the inner diameter is made to be substantially the same as the outer diameter of the connecting pipe inserted into the socket part. A concave portion in which a gap flow path is formed between the concave portion and the outer surface of the connecting pipe, and a convex portion crushed by the fitting into the annular groove and crushed by the inserted connecting pipe are provided on both sides of the concave portion. The outer shape of the cross section is formed into a substantially triangular shape so as to follow the inner shape of the cross section of the annular groove, and when the socket portion and the connecting pipe are simultaneously tightened and connected by the press tool at two positions on both sides of the O-ring, the gap flow path is formed. Double press type pipe characterized by being designed to disappear Fittings.
於いて、環状溝からソケット部開口端までの内径が、環
状溝からソケット部奥端までの内径よりも僅かに大きく
なされていることを特徴とするダブルプレス式管継手。2. The double press type pipe joint according to claim 1, wherein the inner diameter from the annular groove to the socket opening end is slightly larger than the inner diameter from the annular groove to the socket inner end. Double press type pipe fittings.
継手において、環状溝のソケット部開口端側の側縁のア
ールが小さくなされていることを特徴とするダブルプレ
ス式管継手。3. The double press type pipe joint according to claim 1 or 2, wherein a radius of a side edge of the annular groove on the opening end side of the socket portion is made small.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05659995A JP3436822B2 (en) | 1995-02-21 | 1995-02-21 | Double press type pipe fitting |
| TW085209110U TW318539U (en) | 1995-02-21 | 1995-04-12 | Double press type fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05659995A JP3436822B2 (en) | 1995-02-21 | 1995-02-21 | Double press type pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08226582A true JPH08226582A (en) | 1996-09-03 |
| JP3436822B2 JP3436822B2 (en) | 2003-08-18 |
Family
ID=13031689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05659995A Expired - Lifetime JP3436822B2 (en) | 1995-02-21 | 1995-02-21 | Double press type pipe fitting |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3436822B2 (en) |
| TW (1) | TW318539U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001063160A1 (en) * | 2000-02-21 | 2001-08-30 | Franz Viegener Ii Gmbh & Co. Kg | Fitting or mounting for producing a press joint with an inserted tube end |
| US6726256B2 (en) | 2001-10-17 | 2004-04-27 | Franz Viegener Ii Gmbh & Co. Kg | Fitting or mounting part for establishing a pressed connection with an inserted tube end |
| US6874823B2 (en) | 2002-05-10 | 2005-04-05 | Franz Viegener Ii Gmbh & Co. Kg | Connecting piece and connecting arrangement |
| US7823932B2 (en) * | 2006-04-19 | 2010-11-02 | Ibp Conex Limited | Press fitting arrangement with a pre-press leak indicator sealing ring |
| ITMI20100136A1 (en) * | 2010-02-01 | 2011-08-02 | Fra Bo S P A | PRESSURE COUPLING EQUIPMENT WITH RING GASKET. |
| JP2015513641A (en) * | 2011-12-28 | 2015-05-14 | セロ フロー プロダクツ エルエルシーＣｅｒｒｏ Ｆｌｏｗ Ｐｒｏｄｕｃｔｓ Ｌｌｃ | How to use cooling line set fitting and cooling line set fitting to join cooling lines together |
| JP2020076462A (en) * | 2018-11-08 | 2020-05-21 | 東洋フイツテング株式会社 | Pressure resistance pipe joint structure of small-diameter pipe |
| KR200492249Y1 (en) * | 2019-04-22 | 2020-09-04 | 조경호 | Rubber ring for pipe connector |
| JP2021014913A (en) * | 2019-07-16 | 2021-02-12 | 株式会社三五 | Press type pipe joint |
| JP2021028539A (en) * | 2019-08-09 | 2021-02-25 | 株式会社三五 | Construction piping system and construction method of the same |
| JP2021188736A (en) * | 2020-05-26 | 2021-12-13 | 株式会社三五 | System for preventing omission of swaging press type pipe joint |
-
1995
- 1995-02-21 JP JP05659995A patent/JP3436822B2/en not_active Expired - Lifetime
- 1995-04-12 TW TW085209110U patent/TW318539U/en unknown
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001063160A1 (en) * | 2000-02-21 | 2001-08-30 | Franz Viegener Ii Gmbh & Co. Kg | Fitting or mounting for producing a press joint with an inserted tube end |
| US6581983B1 (en) | 2000-02-21 | 2003-06-24 | Franz Viegener Ii Gmbh & Co. Kg | Fitting or mounting for producing a press joint with an inserted tube end |
| AU781956B2 (en) * | 2000-02-21 | 2005-06-23 | Viega Technology Gmbh & Co. Kg | Fitting or mounting for producing a press joint with an inserted tube end |
| CZ296927B6 (en) * | 2000-02-21 | 2006-07-12 | Franz Viegener Ii Gmbh & Co. Kg | Fitting or mounting and joint comprising such fitting or mounting |
| US6726256B2 (en) | 2001-10-17 | 2004-04-27 | Franz Viegener Ii Gmbh & Co. Kg | Fitting or mounting part for establishing a pressed connection with an inserted tube end |
| US6874823B2 (en) | 2002-05-10 | 2005-04-05 | Franz Viegener Ii Gmbh & Co. Kg | Connecting piece and connecting arrangement |
| US7823932B2 (en) * | 2006-04-19 | 2010-11-02 | Ibp Conex Limited | Press fitting arrangement with a pre-press leak indicator sealing ring |
| EP2357389A1 (en) | 2010-02-01 | 2011-08-17 | Fra.Bo S.P.A. | Press fitting apparatus having a sealing ring |
| ITMI20100136A1 (en) * | 2010-02-01 | 2011-08-02 | Fra Bo S P A | PRESSURE COUPLING EQUIPMENT WITH RING GASKET. |
| JP2015513641A (en) * | 2011-12-28 | 2015-05-14 | セロ フロー プロダクツ エルエルシーＣｅｒｒｏ Ｆｌｏｗ Ｐｒｏｄｕｃｔｓ Ｌｌｃ | How to use cooling line set fitting and cooling line set fitting to join cooling lines together |
| JP2020076462A (en) * | 2018-11-08 | 2020-05-21 | 東洋フイツテング株式会社 | Pressure resistance pipe joint structure of small-diameter pipe |
| KR200492249Y1 (en) * | 2019-04-22 | 2020-09-04 | 조경호 | Rubber ring for pipe connector |
| JP2021014913A (en) * | 2019-07-16 | 2021-02-12 | 株式会社三五 | Press type pipe joint |
| JP2021028539A (en) * | 2019-08-09 | 2021-02-25 | 株式会社三五 | Construction piping system and construction method of the same |
| JP2022163089A (en) * | 2019-08-09 | 2022-10-25 | 株式会社三五 | Construction piping system and construction method of the same |
| JP2021188736A (en) * | 2020-05-26 | 2021-12-13 | 株式会社三五 | System for preventing omission of swaging press type pipe joint |
Also Published As
| Publication number | Publication date |
|---|---|
| TW318539U (en) | 1997-10-21 |
| JP3436822B2 (en) | 2003-08-18 |
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