JP2010048330A - Pipe joint for plastic resin pipe - Google Patents

Pipe joint for plastic resin pipe Download PDF

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Publication number
JP2010048330A
JP2010048330A JP2008212848A JP2008212848A JP2010048330A JP 2010048330 A JP2010048330 A JP 2010048330A JP 2008212848 A JP2008212848 A JP 2008212848A JP 2008212848 A JP2008212848 A JP 2008212848A JP 2010048330 A JP2010048330 A JP 2010048330A
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Prior art keywords
pipe
ring
cap
locking
fixing ring
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JP2008212848A
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JP4766707B2 (en
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Takamitsu Sakuraba
高光 櫻庭
Atsuhiro Watanabe
篤弘 渡邉
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Tokai Information System Consultation
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Tokai Information System Consultation
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Priority to JP2008212848A priority Critical patent/JP4766707B2/en
Priority to KR1020117001684A priority patent/KR101267647B1/en
Priority to CN2009801287561A priority patent/CN102105731B/en
Priority to PCT/JP2009/064449 priority patent/WO2010021323A1/en
Publication of JP2010048330A publication Critical patent/JP2010048330A/en
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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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
    • F16L47/10—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket the sealing rings being maintained in place by additional means
    • 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/04—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with a swivel nut or collar engaging the pipe
    • 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
    • F16L21/08—Joints with sleeve or socket with additional locking means
    • 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
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
    • F16L37/0926—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector with an inner support sleeve arranged within the pipe
    • 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
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
    • F16L37/0927—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector the wedge element being axially displaceable for releasing the coupling
    • 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/12—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with additional locking means

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

Abstract

<P>PROBLEM TO BE SOLVED: To undetachably connect a pipe with a single touch by only fitting a connection pipe end into a pipe joint and manually fastening a cap thereto while preventing co-rotation of the pipe with the cap when rotatingly screwing the cap. <P>SOLUTION: A joint body 8 is coveringly screwed to an inner core 9 equipped with a water hole H9 on its inner periphery and an O-ring 4 on its outer periphery while keeping a clearance dg layer. A cap 3, which is internally fitted with a diameter-reducing locking ring 6 and a diameter-reducing fixing ring 5 fitted with a locking skew plate 7, is temporarily screwed to an end part of the joint body 8. A plastic resin pipe 12 is fitted into the clearance dg coveringly the inner core 9 from inside the cap 3 and the cap 3 is rotated/advanced to integrally reduce the diameters of the locking ring 6 and fixing ring 5 with the skew plate protruded to press an outer peripheral surface 12c of the pipe 12 without causing the co-rotation of the pipe 12. The locking skew plate 7 is made to bite into the outer peripheral surface 12c of the pipe 12 to watertightly press the plastic resin pipe 12 to lock and hold it in a manner such that the pipe cannot be disconnected. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、給水管、給湯管のプラスチック樹脂パイプを接続するための管継手に関するものである。   The present invention relates to a pipe joint for connecting a plastic resin pipe of a water supply pipe or a hot water supply pipe.

従来、給水、給湯管には鋳鉄管や鋼管が使用されていたが、近年、耐蝕性、耐震性、衛生面、作業性及びコスト面から、ポリエチレン、架橋ポリエチレン、ポリブテン、エチレン．オクテン．コポリマーなどのプラスチック樹脂で成形されたパイプが、戸建住宅、共同住宅、産業ビルなどでの給水及び給湯用の配管、床暖房、ロードヒーティングの熱媒体用の配管として用いられるようになってきた。
そのため、プラスチック樹脂パイプの接続に有効な管継手として、従来例１及び２の継手が提案されている。 Conventionally, cast iron pipes and steel pipes have been used for water supply and hot water supply pipes, but in recent years, polyethylene, crosslinked polyethylene, polybutene, ethylene, etc. have been used in view of corrosion resistance, earthquake resistance, hygiene, workability and cost. Octene. Pipes molded from plastic resins such as copolymers have come to be used as piping for water supply and hot water supply, floor heating, and heat medium for road heating in detached houses, apartment houses, industrial buildings, etc. It was.
Therefore, the joints of Conventional Examples 1 and 2 have been proposed as pipe joints effective for connecting plastic resin pipes.

図１１は、特許文献１として挙げた従来例１の管継手であり、（Ａ）は接続前の状態の側断面図であり、（Ｂ）は接続状態の側断面図である。
即ち、従来例１（図１１）の管継手は、継手本体と、割りリングと、袋ナットとから成り、図１１（Ａ）に示す如く、継手本体は、外周面にねじ面を備えた雄ねじ管部からインナーコア部を突設し、インナーコア部の外周面には、プラスチック管の内周面を保持するための係止用刻み部を、全長に亘って配置している。 FIG. 11 is a pipe joint of Conventional Example 1 cited as Patent Document 1, (A) is a side sectional view before connection, and (B) is a side sectional view of the connected state.
That is, the pipe joint of Conventional Example 1 (FIG. 11) is composed of a joint body, a split ring, and a cap nut. As shown in FIG. 11 (A), the joint body is a male screw having a threaded surface on the outer peripheral surface. An inner core portion protrudes from the tube portion, and a locking notch for holding the inner peripheral surface of the plastic tube is disposed over the entire length on the outer peripheral surface of the inner core portion.

また、プラスチック管の外周面に嵌める割りリングには、縮径用の割れ部を配置すると共に、内周面に突条部を突設し、外側端部にテーパー面部を備えた外周面には、摩擦低減用に、フッ素樹脂の被膜層を形成している。
また、袋ナットには、前部内周面に、雄ねじ管部の外周に螺合するための雌ねじ部を配置し、後部内周面には、割りリングを縮径するためのテーパー面部を配置し、該テーパー面部にはフッ素樹脂の被膜層を形成している。 In addition, the split ring to be fitted to the outer peripheral surface of the plastic pipe is provided with a crack portion for reducing the diameter, and a protrusion is provided on the inner peripheral surface, and the outer peripheral surface provided with a tapered surface portion on the outer end portion. In order to reduce friction, a fluororesin coating layer is formed.
In addition, the cap nut is provided with a female thread portion for screwing onto the outer periphery of the male screw pipe portion on the front inner peripheral surface, and a tapered surface portion for reducing the diameter of the split ring on the rear inner peripheral surface. A film layer of fluororesin is formed on the tapered surface portion.

そして、プラスチック管の継手本体への接続に際しては、図１１（Ａ）に示す如く、プラスチック管の接続端部外周に、袋ナットを嵌め、次いで割りリングを嵌めて、図１１（Ｂ）の如く、プラスチック管の接続部を、継手本体のインナーコア部の基端まで被覆嵌合して、プラスチック管先端をインナーコア部の基端に当接し、次いで袋ナットを継手本体に螺合前進締着し、袋ナットが割りリングを、インナーコア部の基端まで押し進めると共に、袋ナットのテーパー面が割りリングを押圧縮径することにより、プラスチック管を、内周面に位置するインナーコア部の刻み部と、外周面に位置する割りリングの突条部とによって挟着保持するものである。   When connecting the plastic pipe to the joint body, as shown in FIG. 11 (A), a cap nut is fitted on the outer periphery of the connecting end of the plastic pipe, and then a split ring is fitted, as shown in FIG. 11 (B). The plastic pipe connection part is covered and fitted to the base end of the inner core part of the joint body, the plastic pipe tip is brought into contact with the base end of the inner core part, and then the cap nut is screwed forward and fastened to the joint body. The cap nut pushes the split ring to the proximal end of the inner core portion, and the tapered surface of the cap nut pushes and compresses the split ring, so that the plastic pipe is cut in the inner core portion located on the inner peripheral surface. It is sandwiched and held by the portion and the protrusion of the split ring located on the outer peripheral surface.

図１２は、特許文献２として挙げた従来例２の説明図であって、（Ａ）はプラスチック管の締着状態断面図であり、（Ｂ）は、（Ａ）の要部拡大図である。
即ち、従来例２は、図１２に示す如く、継手本体の内周面凹部には、Ｏリングと、補助リングと、外周面には後方へ縮径するテーパー部を備えた縮径可能な押圧リング、とを順次配置し、且つ、押圧リングの前端の凹部には係止リングを収納し、押圧リングのテーパー部と整合するテーパー部を前端内周に備えたキャップを継手本体に螺合するものである。 12A and 12B are explanatory diagrams of Conventional Example 2 cited as Patent Document 2, in which FIG. 12A is a sectional view of a plastic pipe fastened state, and FIG. 12B is an enlarged view of a main part of FIG. .
That is, in the conventional example 2, as shown in FIG. 12, the inner peripheral surface recess of the joint body is provided with an O-ring, an auxiliary ring, and an outer peripheral surface provided with a tapered portion that reduces the diameter rearward. The ring is sequentially arranged, and the locking ring is housed in the concave portion at the front end of the pressing ring, and a cap having a tapered portion aligned with the tapered portion of the pressing ring on the inner periphery of the front end is screwed into the joint body. Is.

そして、管接続に際しては、プラスチック管の接続端部をキャップ内周面及び継手本体内周面に沿って嵌入し、キャップを継手本体に螺入締着することにより、キャップのテーパー面と押圧リングのテーパー面との協仂作用で押圧リングを前進縮径させ、押圧リングと係止リングが、プラスチック管外周面を押圧止着すると共に、押圧リングの前進による補助リングの前進によってＯリングを押圧して、Ｏリングの径方向変位によってプラスチック管外周面をシールし、且つ係止リングと押圧リングとで、プラスチック管外周を圧接係止保持するものであり、プラスチック管を管継手に挿入してキャップを回動するだけで、プラスチック管がワンタッチで接続出来る管継手である。
特開平９−２２９２５８号公報 特開平１１−１４１７６５号公報 When connecting the pipe, the connecting end of the plastic pipe is fitted along the inner peripheral surface of the cap and the inner peripheral surface of the joint body, and the cap is screwed and fastened to the joint body, so that the taper surface of the cap and the pressure ring The pressure ring is advanced and contracted by the cooperative action with the taper surface, and the pressure ring and the locking ring press and secure the outer peripheral surface of the plastic tube, and the O ring is pressed by the advance of the auxiliary ring by the advance of the pressure ring. The outer peripheral surface of the plastic pipe is sealed by the radial displacement of the O-ring, and the outer periphery of the plastic pipe is pressed and held by the locking ring and the pressing ring. The plastic pipe is inserted into the pipe joint. This is a pipe joint that can be connected with a single touch of a plastic pipe by simply rotating the cap.
JP-A-9-229258 Japanese Patent Application Laid-Open No. 11-141765

従来例１（図１１）の管継手は、割りリングの縮径によって、割りリング内周面の突条部がプラスチック管の外周面に食い込んで掴み、インナーコア部の外周の刻み部との協仂作用で、プラスチック管の引き抜けを阻止するものであって、管継手の締着作用でのプラスチック管の共廻りは、割りリング外周面と、袋ナット内周のテーパー面とに付与した、フッ素系樹脂の被膜層相互のすべりによって抑制出来るが、プラスチック管の挿入接合時には、袋ナット及び割りリングを個々に装着するので作業性に問題がある。   In the pipe joint of Conventional Example 1 (FIG. 11), due to the reduced diameter of the split ring, the protrusion on the inner peripheral surface of the split ring bites into and grips the outer peripheral surface of the plastic pipe, and cooperates with the outer notch of the inner core portion. The plastic pipe is prevented from being pulled out by the dredging action, and the plastic pipe co-rotation by the fastening action of the pipe joint is applied to the outer peripheral surface of the split ring and the tapered surface of the inner periphery of the cap nut. Although it can be suppressed by sliding between the coating layers of the fluororesin, there is a problem in workability because the cap nut and the split ring are individually attached when the plastic pipe is inserted and joined.

即ち、従来例１の管継手は、割りリングを袋ナットに収納して、継手本体に袋ナットを仮螺着した状態で現場に搬入し、現場では、
（イ）．継手本体、割りリング、袋ナットに分解する。
（ロ）．図１１（Ａ）の如く、プラスチック管に袋ナットと割りリングとを間隔を保って嵌合する。
（ハ）．プラスチック管をインナーコア部の基端まで被着する。
（ニ）．割りリングをインナーコア部の基端まで移動する。
（ホ）．袋ナットを割りリング上に被着して継手本体に螺着する。
以上、（イ）〜（ホ）の作業工程での接続作業となり、管の接続は煩雑で、時間を要する。 That is, in the pipe joint of the conventional example 1, the split ring is accommodated in the cap nut, and the cap nut is temporarily screwed into the joint main body and is carried to the site.
(I). Disassemble into joint body, split ring and cap nut.
(B). As shown in FIG. 11A, the cap nut and the split ring are fitted to the plastic tube with a space therebetween.
(C). A plastic tube is attached to the base end of the inner core part.
(D). Move the split ring to the base end of the inner core.
(E). Put the cap nut on the split ring and screw it onto the joint body.
As described above, the connection work is performed in the work steps (A) to (E), and the connection of the pipes is complicated and takes time.

また、従来例１（図１１）の管継手にあっては、袋ナットを適正締着すれば、ウォーターハンマー作用（液体圧力変動による振動作用）や、熱膨張の繰返し作用で、耐用中に弛みを生じて漏水やプラスチック管の抜脱を生ずる怖れがある。
また、漏水防止のために袋ナットを過締着すれば、プラスチック管は、内周面がインナーコア部の複数の刻み部による過圧縮を受け、外周面が割りリング突条部による過圧縮を受けて変形し、長期間経過するとクリープ変形（応力を付加しないのに時間と共に増加する変形）を生来し、止水性が低下する怖れがある。
また、プラスチック管の先端の接続部は、内周面に対するインナーコア部の複数の刻み部の食い込みと、外周面に対する割りリングの突条部の食い込みとによって変形して、漏水防止状態が維持されるため、プラスチック管の塑性変形した接続部は、再度の管接続には利用出来ない。 Further, in the pipe joint of the conventional example 1 (FIG. 11), if the cap nut is properly tightened, the water hammer action (vibration action due to fluctuations in liquid pressure) and the repeated action of thermal expansion will cause slack during service life. May cause water leakage and plastic tube removal.
Also, if the cap nut is over-tightened to prevent water leakage, the plastic pipe will be over-compressed by the multiple notches in the inner core and the outer face will be over-compressed by the split ring ridge. If it is received and deformed, and it elapses for a long period of time, creep deformation (deformation that increases with time without applying stress) occurs, and there is a fear that the water stoppage may be lowered.
Further, the connecting portion at the tip of the plastic pipe is deformed by the biting of the plurality of notch portions of the inner core portion with respect to the inner peripheral surface and the biting ridge portion of the split ring with respect to the outer peripheral surface, so that the water leakage preventing state is maintained. Therefore, the plastically deformed connecting portion of the plastic pipe cannot be used for the pipe connection again.

また、従来例２（図１２）の管継手にあっては、図１２（Ａ）の如く、継手本体の内周面に、Ｏリング、補助リング、係止リング及び押圧リングを内包してキャップ内径部を継手本体内に嵌入仮螺合した管継手に、プラスチック管を挿入してキャップを螺入締着するワンタッチ方式の管継手であるが、係止リングは、押圧リング内の凹部に姿勢制御されないで収納された状態であるため、縮径しない補助リングと縮径する押圧リングとの間で、変位自在に縮径してプラスチック管に食い込み、微視的には、プラスチック管への自在な食い込み作用を奏し、係止リングは、プラスチック管に対して、不安定な食い込み、及び不安定な係止作用を奏し、プラスチック管への強固、且つ不変の係止は出来ない。   Further, in the pipe joint of the conventional example 2 (FIG. 12), as shown in FIG. 12 (A), the inner peripheral surface of the joint body includes an O-ring, an auxiliary ring, a locking ring and a pressing ring. This is a one-touch type pipe joint in which a plastic pipe is inserted into a pipe joint in which the inner diameter portion is inserted into the joint body and temporarily tightened, and the cap is screwed and tightened. Since it is stored in an uncontrolled state, it can be displaced freely between the auxiliary ring that does not reduce the diameter and the pressure ring that reduces the diameter, and bite into the plastic pipe. The locking ring has an unstable biting action and an unstable locking action with respect to the plastic tube, and cannot be firmly and permanently locked to the plastic pipe.

また、可撓性のプラスチック管は巻物で現場に搬入されるため、巻癖が付いており、管継手への挿入用接続部の管断面は、楕円形に変形している。
そのため、プラスチック管接続部を、無造作にキャップ内径部に嵌入すれば、内径方向に露出しているＯリングに管先端が衝突して、継手本体の内周の溝に嵌合しているＯリングに、内周方向に引出す作用を付与し、Ｏリングを、嵌入溝から脱落させたり、切断したり、変形させたりし、プラスチック管を接続した管継手は、Ｏリングが所期のシール性を発揮出来ないことと、係止リングの制御不能で不確実な係止作用と相俟って、漏水を生じたり、係止の弛みによるプラスチック管の抜脱の怖れがある。 Further, since the flexible plastic tube is carried into the site as a roll, it has a winding rod, and the cross section of the connecting portion for insertion into the pipe joint is deformed into an elliptical shape.
Therefore, if the plastic pipe connecting part is inserted into the inner diameter part of the cap at random, the pipe tip collides with the O ring exposed in the inner diameter direction, and the O ring is fitted in the inner peripheral groove of the joint body. In addition, the O-ring has a desired sealing performance when it is connected to a plastic pipe by giving the action of pulling in the inner circumferential direction and dropping the O-ring from the insertion groove, cutting it, or deforming it. Combined with the fact that the locking ring cannot be exerted and the locking ring is uncontrollable and uncertain, there is a fear that water leaks or the plastic tube is pulled out due to loosening of the locking.

そして、管継手に漏水やパイプ係止弛みが生ずれば、キャップを取外し、プラスチック管を抜去して、押圧リング、係止リング、補助リング、Ｏリングを一旦取外した後、再度管継手を再セットし、プラスチック管を挿入することとなる。
従って、巻癖の付いたプラスチック管の接続作業は、注意力を要する困難な作業となり、作業性が悪い。 If water leakage or slack in the pipe fitting occurs in the pipe joint, remove the cap, remove the plastic pipe, remove the pressing ring, the locking ring, the auxiliary ring, and the O-ring once, and then reconnect the pipe joint. Set and insert a plastic tube.
Therefore, the connecting operation of the plastic pipe with the winding rod is a difficult operation requiring attention, and the workability is poor.

また、例え、プラスチック管がＯリングを損傷せずに管継手内に挿入出来ても、キャップ締着作業は、キャップ内径部がプラスチック管外周面に接触していること、及び最終締付けが押圧リングに回動押圧力を付与することにより、プラスチック管は、押圧リングと共廻りして部分捩れを発生し、プラスチック管に座屈、又は応力歪を生じ、プラスチック管自体の耐久性を損なう問題がある。   For example, even if the plastic pipe can be inserted into the pipe joint without damaging the O-ring, the cap tightening work must be performed so that the inner diameter of the cap is in contact with the outer peripheral surface of the plastic pipe, and the final tightening is the pressing ring. By applying a rotational pressing force to the plastic tube, the plastic tube rotates with the pressing ring and partially twists, causing buckling or stress distortion in the plastic tube, which impairs the durability of the plastic tube itself. is there.

そして、プラスチック管の共廻り捩れは、捩れからの回復応力がキャップに緩め応力として作用し、耐用中のウォーターハンマー作用、及び熱による膨張収縮作用の繰返しと相俟って、締着力の緩みによる漏水、及びプラスチック管の抜脱の怖れがある。
本発明は、これら従来例１，２の問題を解決又は改善した画期的な、ワンタッチ接続タイプのプラスチック管継手を提供するものである。 The twisting of the plastic tube is due to the loosening of the tightening force, coupled with the repeated action of the water hammer action during the service life and the expansion and contraction action due to heat. There is a fear of water leakage and removal of the plastic tube.
The present invention provides an innovative one-touch connection type plastic pipe joint that solves or improves the problems of the conventional examples 1 and 2.

本発明のプラスチック樹脂パイプ用の管継手は、例えば図１に示す如く、管状のインナーコア９の外周に継手本体８を装着し、継手本体８の端部にキャップ３を冠着し、可撓性のプラスチック樹脂パイプ１２をキャップ３を介してインナーコア９上に被覆挿入し、キャップ３の回動によってワンタッチでプラスチック樹脂パイプ１２を接続する管継手であって、インナーコア９は、通水孔Ｈ９を備えたパイプ形態であって、外周面９ｃには、継手本体８を螺着するねじ面９Ｓと、係止溝９Ｇに嵌合したＯリング４とを備え、継手本体８は、パイプ形態であって、内周面８ｄには、インナーコア９螺着用のねじ面８Ｓ´を、外周面８ｃにはキャップ３螺着用のねじ面８Ｓを備えると共に、内周面端部には外方に拡径するテーパー面ｔ８を備え、キャップ３は、後面３Ｂに挿入用孔Ｈ３を備え、内周面前部には継手本体のねじ面８Ｓと螺合するねじ面３Ｓを、内周面後部には外方に縮径するテーパー面ｔ３を備え、キャップ３内には、前部に継手本体８のテーパー面ｔ８と整合するテーパー面ｔａを、後部にキャップ３のテーパー面ｔ３と整合するテーパー面ｔｂとを外周に有し、後面５Ｂに嵌合用突出片５Ｐを有し、縮径用のスリット５Ｇを備えた固定リング５と、後部にキャップ３のテーパー面ｔ３と整合するテーパー面ｔｃを、前面６Ｆに、係止斜板７を内周面６ｄから突出形態で嵌着する嵌合用欠け込みＣ６を有し、縮径用のスリット６Ｇを備えた係止リング６、とを嵌合内包し、プラスチック樹脂パイプ１２を、キャップ３の挿入用孔Ｈ３からインナーコア９と継手本体８との隙間ｄｇに挿入し、キャップ３の螺合締着によって、固定リング５と係止リング６が係止斜板７を挟着一体化して縮径し、プラスチック樹脂パイプ１２をインナーコア９外周面９ｃに水密押圧して係止するものである。   A pipe joint for a plastic resin pipe according to the present invention includes a joint body 8 attached to the outer periphery of a tubular inner core 9 and a cap 3 attached to the end of the joint body 8 as shown in FIG. 1 is a pipe joint in which a plastic resin pipe 12 is covered and inserted on the inner core 9 through the cap 3 and the plastic resin pipe 12 is connected with one touch by turning the cap 3. The outer peripheral surface 9c is provided with a thread surface 9S to which the joint body 8 is screwed and an O-ring 4 fitted in the locking groove 9G, and the joint body 8 has a pipe shape. The inner peripheral surface 8d is provided with a screw surface 8S 'for screwing the inner core 9, the outer peripheral surface 8c is provided with a screw surface 8S for screwing the cap 3, and the inner peripheral surface end is outwardly provided. It has a tapered surface t8 that expands, The cap 3 is provided with an insertion hole H3 in the rear surface 3B, a screw surface 3S that is screwed with the screw surface 8S of the joint body at the front portion of the inner peripheral surface, and a tapered surface t3 that is reduced in diameter outward at the rear portion of the inner peripheral surface. The cap 3 has a tapered surface ta aligned with the tapered surface t8 of the joint body 8 at the front portion and a tapered surface tb aligned with the tapered surface t3 of the cap 3 on the outer periphery, and the rear surface 5B. A fixing ring 5 having a fitting protrusion piece 5P and a slit 5G for reducing the diameter, a tapered surface tc aligned with the tapered surface t3 of the cap 3 at the rear, and a locking swash plate 7 on the front surface 6F. The engagement ring 6 having a fitting notch C6 fitted in a protruding form from the inner peripheral surface 6d and having a slit 6G for diameter reduction is fitted and contained, and the plastic resin pipe 12 is connected to the cap 3 From the insertion hole H3, the inner core 9 and the joint body 8 When the cap 3 is screwed and fastened, the fixing ring 5 and the locking ring 6 are clamped and integrated with the locking swash plate 7 to reduce the diameter, and the plastic resin pipe 12 is connected to the outer peripheral surface 9c of the inner core 9. It is watertight pressed and locked.

この場合、管継手を構成する各部材の材質は問わないが、砲金や真鍮製であれば、錆、金属溶出等の問題を生じるため、プラスチック樹脂材が好ましく、典型的には、キャップ３、継手本体８、インナーコア９は、ポリエーテルイミド樹脂（商品名：ウルテム樹脂）成形品であり、固定リング５、係止リング６はポリフェニレンオキサイド樹脂（商品名：ノリル樹脂）成形品である。   In this case, although the material of each member which comprises a pipe joint is not ask | required, since it will produce problems, such as rust and a metal elution, if it is made of gunmetal or brass, a plastic resin material is preferable. The joint body 8 and the inner core 9 are molded articles of polyetherimide resin (trade name: Ultem resin), and the fixing ring 5 and the locking ring 6 are molded articles of polyphenylene oxide resin (trade name: noryl resin).

また、インナーコア９の外周面９ｃと継手本体８の内周面８ｄとの隙間ｄｇは、プラスチック樹脂パイプ１２が嵌入出来る寸法であれば良く、隙間ｄｇの形成は、図１（Ａ）の如く、継手本体内周面８ｄを平滑とし、インナーコア外周面９ｃの拡径段部ｄ９で形成しても良く、或いは、図示していないが、継手本体内周面８ｄに縮径突出段部を形成し、インナーコア外周面９ｃを平滑面としても良く、或いは、図示していないが、継手本体内周面８ｄ及びインナーコア外周面９ｃ双方から隙間ｄｇ形成用の段差突出を配置しても良く、隙間ｄｇの形成は、管継手の製作面から適宜に選択決定すれば良い。
また、管継手を採用する可撓性のプラスチック樹脂パイプ１２は、典型的には、リサイクルが可能で、可撓性に優れるエチレン．オクテン．コポリマー（ＰＥ−ＲＴ）樹脂製である。 Further, the gap dg between the outer peripheral surface 9c of the inner core 9 and the inner peripheral surface 8d of the joint body 8 may be of a size that allows the plastic resin pipe 12 to be inserted. The formation of the gap dg is as shown in FIG. The joint body inner peripheral surface 8d may be smooth and may be formed by the diameter-expanded step portion d9 of the inner core outer peripheral surface 9c. Alternatively, although not shown, the joint body inner peripheral surface 8d may have a reduced diameter protruding step portion. The inner core outer peripheral surface 9c may be formed as a smooth surface, or although not shown, step protrusions for forming the gap dg may be disposed from both the joint body inner peripheral surface 8d and the inner core outer peripheral surface 9c. The formation of the gap dg may be appropriately selected and determined from the production surface of the pipe joint.
In addition, the flexible plastic resin pipe 12 employing a pipe joint is typically recyclable ethylene. Octene. It is made of a copolymer (PE-RT) resin.

また、Ｏリング４は、典型的には、耐磨耗性、耐熱性に優れた、ＪＩＳＢ２４０１のニトリルゴムの太さ１．９mmの断面円形リングであり、採用するプラスチック樹脂パイプ１２の許容誤差に対応出来る形態に配置すれば良く、ＪＩＳ規格の呼び径１３mmの外径Ｒ１２が１７mm、内径Ｒ１２´が１３mmのプラスチック樹脂パイプ１２では、許容誤差が±０．１５mmであるため、太さ１．９mmのＯリング４は、外径Ｒ９´が１２．６mmのインナーコア９の外周面９ｃから０．５mm突出形態とすれば良い。
そして、Ｏリング４は、プラスチック樹脂パイプ１２の径の許容誤差にも十分なシール性で対応するため、典型的には、２本配置とし、各Ｏリング４は固定リング５の押圧域内での配置とすれば良い。 The O-ring 4 is typically a circular ring with a 1.9 mm thickness of JISB2401 nitrile rubber having excellent wear resistance and heat resistance. The plastic resin pipe 12 having an outer diameter R12 having a nominal diameter of 13 mm of 17 mm and an inner diameter R12 ′ of 13 mm has a tolerance of ± 0.15 mm, so the thickness is 1.9 mm. The O-ring 4 may be configured to protrude 0.5 mm from the outer peripheral surface 9c of the inner core 9 having an outer diameter R9 'of 12.6 mm.
Since the O-ring 4 corresponds to the tolerance of the diameter of the plastic resin pipe 12 with sufficient sealing performance, typically, two O-rings are arranged, and each O-ring 4 is within the pressing area of the fixing ring 5. Arrangement is sufficient.

また、係止リング６と一体的に縮径作用する固定リング５は、キャップ３内に緩嵌合で内包維持され、且つ、自由状態ではキャップ３の挿入用孔Ｈ３から貫入したパイプ１２が貫通されれば良い。
また、固定リング５の、前部のテーパー面ｔａ、後部のテーパー面ｔｂ、及び縮径用の割り溝形態のスリット５Ｇは、固定リング５が、キャップ３の前進に伴なって前進することにより、前部テーパー面ｔａが継手本体８のテーパー面ｔ８で、後部テーパー面ｔｂがキャップ３のテーパー面ｔ３で押圧縮径してプラスチック樹脂パイプ１２をインナーコア９の外周面９ｃに水密的に押圧出来、且つ、後面５Ｂでは、係止リング６に嵌着した係止斜板７を挟着するためのテーパー面ｔ´５を備えた嵌合用突出片５Ｐを有しておれば良い。 In addition, the fixing ring 5 whose diameter is reduced integrally with the locking ring 6 is maintained in the cap 3 by being loosely fitted, and in a free state, the pipe 12 penetrating from the insertion hole H3 of the cap 3 penetrates. It should be done.
In addition, the front tapered surface ta, the rear tapered surface tb, and the slit 5G in the form of a split groove for diameter reduction of the fixing ring 5 are caused by the fixing ring 5 moving forward with the advancement of the cap 3. The front tapered surface ta is the tapered surface t8 of the joint body 8 and the rear tapered surface tb is pressed and compressed by the tapered surface t3 of the cap 3 to press the plastic resin pipe 12 against the outer peripheral surface 9c of the inner core 9 in a watertight manner. The rear surface 5 </ b> B only needs to have a fitting protruding piece 5 </ b> P having a tapered surface t ′ <b> 5 for sandwiching the locking swash plate 7 fitted to the locking ring 6.

そして、固定リング５のテーパー面ｔｂと、キャップ３のテーパー面ｔ３と、縮径用スリット５Ｇとの関係構造は、キャップ３を継手本体８に前進螺合して、キャップ３の回転が固くなった段階で、固定リング５のプラスチック樹脂パイプ１２の外周面１２ｃへの過押圧を生じない構造、即ち、可撓性のプラスチック樹脂パイプ１２がインナーコア９の外周面に水密的に押圧出来る構造とするのが好ましく、典型的には、外周径Ｒ１２が１７mmのプラスチック樹脂パイプ１２に対しては、固定リング５の挿入用孔Ｈ５の径Ｒ５´は１７．６mmであり、スリット５Ｇの幅は２．５mmである。   Then, the relationship between the taper surface tb of the fixing ring 5, the taper surface t3 of the cap 3 and the diameter-reducing slit 5G is such that the cap 3 is advanced and screwed into the joint body 8, and the rotation of the cap 3 becomes hard. At this stage, the structure in which the fixing ring 5 does not overpress the outer peripheral surface 12c of the plastic resin pipe 12, that is, the flexible plastic resin pipe 12 can be pressed against the outer peripheral surface of the inner core 9 in a watertight manner. Typically, for a plastic resin pipe 12 having an outer diameter R12 of 17 mm, the diameter R5 ′ of the insertion hole H5 of the fixing ring 5 is 17.6 mm, and the width of the slit 5G is 2 .5 mm.

また、係止リング６は、プラスチック樹脂パイプ１２の表面に食い込む係止斜板７を嵌着した状態で、キャップ３の締着前進持に固定リング５に圧接一体化されれば良く、固定リング５の挿入用孔Ｈ５と同径の挿入用孔Ｈ６を備え、外周後部には、固定リング５に一体化接合した際に、固定リング５の後部テーパー面ｔｂの延長形態を成すためのテーパー面ｔｃを備え、前面６Ｆには、固定リング５の突出片５Ｐが嵌入する欠け込みＣ６で、係止斜板７を挟着するテーパー面ｔ´６を備えた構造であれば良く、典型的には、図１（Ｂ）に示す如く、欠け込みＣ６の断面形状は、固定リング５の突出片５Ｐの断面形状に整合し、欠け込みＣ６の下面を成すテーパー面ｔ´６は、固定リング５の突出片５Ｐの下面を成すテーパー面ｔ´５と整合するものである。   Further, the locking ring 6 may be integrated with the fixing ring 5 in a state where the locking swash plate 7 that bites into the surface of the plastic resin pipe 12 is fitted, and is fixed to the fixing ring 5 to hold the cap 3 fastened. 5 has an insertion hole H6 having the same diameter as that of the insertion hole H5, and a tapered surface for forming an extension of the rear tapered surface tb of the fixing ring 5 when integrally joined to the fixing ring 5 at the outer peripheral rear part tc, and the front surface 6F has a notch C6 into which the protruding piece 5P of the fixing ring 5 is fitted, and has a tapered surface t′6 for sandwiching the locking swash plate 7, and typically, As shown in FIG. 1B, the cross-sectional shape of the notch C6 matches the cross-sectional shape of the protruding piece 5P of the fixing ring 5, and the tapered surface t′6 that forms the lower surface of the notch C6 is the fixing ring 5. Aligned with the tapered surface t′5 forming the lower surface of the protruding piece 5P Than is.

また、係止斜板７は、パイプ１２の挿通を許容し、係止リング６の縮径によってプラスチック樹脂パイプ１２の表面に食い込んでパイプ１２の抜脱を阻止出来れば良く、典型的には、図７に示す如く、１枚のＣ字状弾性板である。
そして、係止斜板７の係止リング内周面６ｄからの内方への径方向突出は、係止リング６の縮径前の自由状態では、プラスチック樹脂パイプ１２の挿入を許容し、固定リング５と一体化した締着状態では、プラスチック樹脂パイプ１２の外周面１２ｃに係止食い込み作用を奏するための、０．０３〜０．０８mmの微突出であり、典型的には、０．０５mmの突出である。 Further, the locking swash plate 7 is only required to allow the pipe 12 to be inserted and to bite into the surface of the plastic resin pipe 12 due to the reduced diameter of the locking ring 6 to prevent the pipe 12 from being pulled out. As shown in FIG. 7, it is one C-shaped elastic board.
Further, the inward radial protrusion of the locking swash plate 7 from the locking ring inner peripheral surface 6d allows the plastic resin pipe 12 to be inserted and fixed in a free state before the locking ring 6 is reduced in diameter. In the fastening state integrated with the ring 5, it is a fine protrusion of 0.03 to 0.08 mm for exerting a locking and biting action on the outer peripheral surface 12c of the plastic resin pipe 12, typically 0.05mm. Is a protrusion.

また、係止リング６の嵌合用の欠け込みＣ６は、係止斜板７を嵌着保持し、且つ固定リング後面の嵌合用突出片５Ｐとの嵌着で、係止リング６と固定リング５とが係止斜板７を挟着した形態で一体化出来れば良く、係止斜板７として、ステンレス鋼板等の弾性板を採用すれば、係止斜板７を弾性縮径して欠け込みＣ６に嵌めることにより、係止斜板７は弾撥力によって欠け込みＣ６内に着座する。
そして、係止斜板７の突出角度は、材質面、嵌着性、等の面から決定すれば良いが、典型的には、図１（Ｂ）に示す如く、欠け込みＣ６は係止斜板嵌着用のテーパー面ｔ´６を備えた断面三角形態であって、テーパー面ｔ´６は、固定リング５の突出片５Ｐのテーパー面ｔ´５と同一の勾配１（４５°）である。 Further, the engagement notch C6 of the locking ring 6 fits and holds the locking swash plate 7 and is fitted to the fitting protruding piece 5P on the rear surface of the fixing ring, so that the locking ring 6 and the fixing ring 5 are fitted. And the locking swash plate 7 may be integrated. If an elastic plate such as a stainless steel plate is used as the locking swash plate 7, the locking swash plate 7 is elastically reduced in diameter and chipped. By engaging with C6, the locking swash plate 7 is chipped by the resilience and seated in C6.
The projection angle of the locking swash plate 7 may be determined from the surface of material, fitability, etc. Typically, as shown in FIG. The taper surface t′6 has a tapered surface t′6 for plate fitting, and the taper surface t′6 has the same gradient 1 (45 °) as the taper surface t′5 of the protruding piece 5P of the fixing ring 5. .

従って、本発明の管継手でのプラスチック樹脂パイプ１２の接続作業は、図１の如く、キャップ外端（後端）の挿入用孔Ｈ３からパイプを挿入して、パイプ１２を、キャップ３に内包保持された固定リング５及び係止リング６と、インナーコア９外周面９ｃの隙間を挿通して、インナーコア９の外周面９ｃと継手本体８の内周面８ｄとの隙間ｄｇの最奥の段部ｄ９まで挿入し、キャップ３を手動で回転するだけでキャップ３が継手本体８上を螺合前進し、同時に、係止リング６がキャップ３に押圧されて固定リング５に係止斜板７を挟着した形態で嵌合一体化し、係止リング６と固定リング５とは一体化物として、キャップ３のテーパー面ｔ３と継手本体８のテーパー面ｔ８との協仂作用で、共に縮径して、パイプ１２の内周面１２ｄをインナーコア外周のＯリング４に圧接し、同時に、係止斜板７がパイプ１２の外周面１２ｃに食い込んで、パイプ１２を水密押圧状態の下で係止掴持し、ワンタッチ方式でプラスチック樹脂パイプ１２の管継手への接続締着が実施出来る。   Accordingly, the plastic resin pipe 12 is connected to the pipe joint of the present invention by inserting the pipe 12 through the insertion hole H3 at the outer end (rear end) of the cap as shown in FIG. The innermost surface 9c of the inner core 9 and the inner peripheral surface 8d of the joint body 8 are inserted through the gaps between the held fixing ring 5 and the locking ring 6 and the outer peripheral surface 9c of the inner core 9, and the innermost surface 8d of the joint body 8 is the innermost part. The cap 3 is screwed forward on the joint body 8 just by manually inserting the cap 3 and rotating the cap 3 at the same time. At the same time, the locking ring 6 is pressed by the cap 3 and locked to the fixing ring 5. 7 is sandwiched and integrated, and the locking ring 6 and the fixing ring 5 are integrated, and the diameter is reduced by the cooperative action of the tapered surface t3 of the cap 3 and the tapered surface t8 of the joint body 8. The inner peripheral surface 12d of the pipe 12 -Pressing contact with the O-ring 4 on the outer periphery of the core, and at the same time, the locking swash plate 7 bites into the outer peripheral surface 12c of the pipe 12, and the pipe 12 is locked and held under a watertight pressing state. Connection fastening to the pipe joint can be performed.

また、インナーコア９の存在により、巻癖の付いたプラスチック樹脂パイプ１２であっても、管継手内への挿入は真円形態での案内挿入となり、例えパイプ先端がＯリング突出部に衝突しても、パイプ１２の先端は、Ｏリング４を弾性拡径して係止溝９Ｇ内から引出す程の応力を付与すること無く、Ｏリング４上をスムーズに摺動して、Ｏリング４に対する変形、損傷は生じない。
そして、キャップ３の締着初期段階では、固定リング５、及び係止斜板７を備えた係止リング６が、キャップ３の回動によるパイプ１２外周面１２ｃに対する摺動回動で前進し、パイプ１２に捩れを生ずること無く進む。 Further, due to the presence of the inner core 9, even in the case of a plastic resin pipe 12 with a winding rod, the insertion into the pipe joint is a guide insertion in a perfect circle shape, for example, the pipe tip collides with the O-ring protrusion. However, the tip of the pipe 12 smoothly slides on the O-ring 4 without applying a stress that causes the O-ring 4 to be elastically expanded and pulled out from the locking groove 9G. Deformation and damage do not occur.
Then, in the initial fastening stage of the cap 3, the locking ring 6 including the fixing ring 5 and the locking swash plate 7 moves forward by sliding rotation with respect to the outer peripheral surface 12c of the pipe 12 by rotation of the cap 3, The pipe 12 proceeds without twisting.

そして、固定リング５に係止リング６が嵌合して、一体化部材として縮径を開始し、パイプ１２の外周面１２ｃに押圧摩擦を漸増する段階からは、前部のテーパー面ｔａと継手本体のテーパー面ｔ８との押圧摩擦力の増大と、パイプ内周面１２ｄのインナーコア９外周面９ｃへの押圧摩擦力の増大と、スリット５Ｇ，６Ｇの両側縁、及び係止斜板７のパイプ外周面１２ｃに対する係止力増大との協仂作用が、後部のテーパー面ｔｂ，ｔｃで受けるキャップ３からの回転摩擦力を上回るため、固定リング５及び係止リング６は当接一体化挙動して、パイプ１２に共廻りを生じさせることなく、パイプ１２の外周面を押圧締着する。   Then, the locking ring 6 is fitted to the fixing ring 5 to start the diameter reduction as an integrated member, and from the stage of gradually increasing the pressure friction to the outer peripheral surface 12c of the pipe 12, the front tapered surface ta and the joint Increase in pressing frictional force with the tapered surface t8 of the main body, increase in pressing frictional force on the inner peripheral surface 9c of the inner peripheral surface 9d of the pipe inner peripheral surface 12d, both side edges of the slits 5G and 6G, and the locking swash plate 7 Since the cooperative action with the increase in the locking force on the pipe outer peripheral surface 12c exceeds the rotational friction force from the cap 3 received by the rear tapered surfaces tb and tc, the fixed ring 5 and the locking ring 6 are in contact-integrated behavior. Then, the outer peripheral surface of the pipe 12 is pressed and fastened without causing the pipe 12 to rotate together.

そのため、固定リング５と係止リング６が縮径してパイプ１２を押圧締着するキャップ３の最終螺着時では、固定リング５と係止リング６とは、無回動、且つ一体化部材として、パイプ１２をインナーコア９に押圧するだけであり、プラスチック樹脂パイプ１２は、接続部に、共廻りによる座屈、又は捩れを生ずることなく管継手での締着接続が出来る。
そして、キャップ３を手動で固くなるまで締着すれば、固定リング５及び係止リング６の縮径が、縮径用スリット５Ｇ，６Ｇ、及び係止斜板７のプラスチック樹脂パイプ外周面１２ｃへの食い込みで、プラスチック樹脂パイプ１２に対する引き抜け阻止を達成すると共に、パイプ１２のインナーコア９の外周面９ｃに対する水密押圧を保証する。 Therefore, when the cap 3 that presses and fastens the pipe 12 by reducing the diameter of the fixing ring 5 and the locking ring 6 is finally screwed, the fixing ring 5 and the locking ring 6 do not rotate and are an integral member. As a result, the plastic resin pipe 12 can be fastened and connected by a pipe joint without causing buckling or twisting due to co-rotation at the connecting portion.
Then, if the cap 3 is manually tightened until it becomes hard, the diameters of the fixing ring 5 and the locking ring 6 are reduced to the diameter-reducing slits 5G and 6G and the plastic resin pipe outer peripheral surface 12c of the locking swash plate 7. As a result, the plastic resin pipe 12 is prevented from being pulled out and the water-tight press against the outer peripheral surface 9c of the inner core 9 of the pipe 12 is ensured.

しかも、係止斜板７は、係止リング６と固定リング５との一体化挟着によって強固に姿勢が制御され、設計どおりの、不変の係止作用を達成する。
そのため、本発明の管継手は、簡単なワンタッチ方式での接続締着作業でありながら、プラスチック樹脂パイプ１２の接続部には共廻り現象を生ずることなく、Ｏリング４に対する変位、損傷も生ずることなく、確実な水密押圧、及び、ウォーターハンマー（流体圧力変動）や熱膨張の繰返し作用にも対抗出来る、確実なパイプ止着保持を可能とする。 Moreover, the posture of the locking swash plate 7 is firmly controlled by the integrated clamping of the locking ring 6 and the fixing ring 5, and achieves the unchanged locking action as designed.
For this reason, the pipe joint of the present invention is a simple one-touch connection fastening operation, but the joint portion of the plastic resin pipe 12 does not cause a co-rotation phenomenon, and the O-ring 4 is displaced and damaged. In addition, it is possible to reliably hold the pipe tightly, which can withstand reliable watertight pressing and repeated action of water hammer (fluid pressure fluctuation) and thermal expansion.

また、本発明にあっては、図１（Ａ）に示す如く、インナーコア９が複数本のＯリング４を備え、キャップ３の螺合締着時に、固定リング５の前部のテーパー面ｔａと継手本体テーパー面ｔ８との協仂作用によって、固定リング５がプラスチック樹脂パイプ１２をＯリング４に押圧するのが好ましい。
この場合、Ｏリング４は、複数本を適宜間隔を保って配置すれば、プラスチック樹脂パイプ内周面１２ｄとＯリング４群とは、面シールを構成し、各Ｏリング４の突出寸法を抑えても十分なシール作用が得られるが、典型的には、Ｏリング４は、中心間隔（Ｌ９´）を５mmで、各Ｏリング４をインナーコア外周面９ｃから０．５mm突出形態で配置する。 Further, in the present invention, as shown in FIG. 1A, the inner core 9 includes a plurality of O-rings 4, and when the cap 3 is screwed and fastened, the tapered surface ta of the front portion of the fixing ring 5 is provided. It is preferable that the fixing ring 5 presses the plastic resin pipe 12 against the O-ring 4 by the cooperative action of the joint main body taper surface t8.
In this case, if a plurality of O-rings 4 are arranged at an appropriate interval, the inner peripheral surface 12d of the plastic resin pipe and the O-ring 4 group constitute a face seal, and the protruding dimension of each O-ring 4 is suppressed. However, typically, the O-ring 4 has a center interval (L9 ′) of 5 mm, and each O-ring 4 is arranged in a form protruding 0.5 mm from the inner core outer peripheral surface 9c. .

また、固定リング５は、係止リング６と一体となって、内周面５ｄの前後方向幅（軸方向幅）Ｗ５が係止リング６の内周面幅Ｗ６（標準：４mm）と合体して各Ｏリング４の配置域からインナーコア９の先端域までカバーする寸法が好ましく、典型的には、固定リング５は、幅Ｗ５が１７mmであり、前部のテーパー面ｔａの幅Ｗａが７mm、後部のテーパー面ｔｂの幅Ｗｂが５mmである。
この場合、固定リング５は、プラスチック樹脂パイプ１２の抜脱（抜け出し）をも阻止する機能が要求されるため、固定リング５の内周面５ｄには、例えば、凹凸面、ねじ面等の摩擦力増加手段を付与するのが好ましい。 Further, the fixing ring 5 is integrated with the locking ring 6 so that the front-rear direction width (axial width) W5 of the inner peripheral surface 5d is combined with the inner peripheral surface width W6 (standard: 4 mm) of the locking ring 6. The dimension covering the area from the arrangement area of each O-ring 4 to the tip area of the inner core 9 is preferable. Typically, the fixing ring 5 has a width W5 of 17 mm, and the width Wa of the front tapered surface ta is 7 mm. The width Wb of the rear tapered surface tb is 5 mm.
In this case, since the fixing ring 5 is required to have a function of preventing the plastic resin pipe 12 from being pulled out (extracted), the inner peripheral surface 5d of the fixing ring 5 has, for example, friction such as an uneven surface and a screw surface. It is preferable to provide a force increasing means.

従って、本発明にあっては、プラスチック樹脂パイプ１２に対し、固定リング５が、前部では、継手本体８の円錐テーパー面ｔ８内に圧入され、且つ、キャップ３内周面３ｄが継手本体の薄肉化した円錐テーパー面ｔ８の外周を補強確保することにより、保証された押圧力を受けるテーパー面ｔａによって、Ｏリング４へのシール作用を付与し、後部では、テーパー面ｔｂが、後続一体化した係止リング６のテーパー面ｔｃと連続形態となって、キャップ３の押圧による一体化縮径で、係止リング６の内周面６ｄと固定リング５の内周面５ｄとの押圧締着作用と、係止斜板７のパイプ外周面１２ｃへの食い込みによる止着係止作用を付与するため、固定リング５は、係止リング６と一体となって、水密押圧作用と引き抜け防止とが保証される。   Therefore, in the present invention, the fixing ring 5 is press-fitted into the conical taper surface t8 of the joint main body 8 at the front portion with respect to the plastic resin pipe 12, and the inner peripheral surface 3d of the cap 3 is the joint main body. By securing the outer periphery of the thinned conical taper surface t8, the taper surface ta that receives a guaranteed pressing force provides a sealing action to the O-ring 4, and at the rear, the taper surface tb is integrated continuously. The locking ring 6 is continuously connected to the tapered surface tc, and the inner diameter 6d of the locking ring 6 and the inner circumferential surface 5d of the fixing ring 5 are pressed and fastened with an integrated diameter reduction by pressing the cap 3. The fixing ring 5 is integrated with the locking ring 6 in order to provide the function and the locking operation by the engagement of the locking swash plate 7 into the pipe outer peripheral surface 12c. Is guaranteed

そして、複数のＯリング４によってシール作用面が形成出来るため、Ｏリング４の配置も、プラスチック樹脂パイプ１２のインナーコア９への被覆挿入嵌合時に、Ｏリング４が挿入嵌合障害とならない程度の小寸（標準：０．５mm）の突出量としても、固定リング５によるプラスチック樹脂パイプ１２に対する完全な水密押圧作用が得られる。
そのため、プラスチック樹脂パイプ１２の管継手への挿入が容易で、キャップ３を手動で回動するだけで接続締着が出来、且つ漏水の怖れも、引き抜けの怖れも無い、ワンタッチ方式の管継手となる。 Since a plurality of O-rings 4 can form a sealing action surface, the O-ring 4 is arranged so that the O-ring 4 does not become an insertion-fitting trouble when the plastic resin pipe 12 is inserted into the inner core 9 by being covered. Even when the projection amount is small (standard: 0.5 mm), a complete watertight pressing action on the plastic resin pipe 12 by the fixing ring 5 can be obtained.
Therefore, it is easy to insert the plastic resin pipe 12 into the pipe joint, the connection can be fastened only by manually rotating the cap 3, and there is no fear of water leakage or pulling out. It becomes a pipe joint.

また、本発明は、インナーコア９、継手本体８及びキャップ３は透視可能プラスチック樹脂製であるのが好ましい。
この場合、透視可能とは、透明又は着色半透明であって、裏側（内側）の部品（部材）が透過目視出来る意味である。
そして、固定リング５及び係止リング６も、透視可能な半透明色としておけば、外部からのパイプ１２の目視が可能となる。
また、Ｏリング４は、プラスチック樹脂パイプの内側となる部材であるため、黒色としておけば、着色プラスチック樹脂パイプ１２を介しての外部からの目視も可能となる。 In the present invention, the inner core 9, the joint body 8, and the cap 3 are preferably made of a transparent plastic resin.
In this case, being transparent means transparent or colored translucent, and means that the back side (inner side) component (member) can be seen through.
If the fixing ring 5 and the locking ring 6 are also made of a translucent color that can be seen through, the pipe 12 can be seen from the outside.
Further, since the O-ring 4 is a member on the inner side of the plastic resin pipe, if the O-ring 4 is black, it can be visually observed from the outside through the colored plastic resin pipe 12.

従って、管継手によるプラスチック樹脂パイプ１２の接続作業時に、プラスチック樹脂パイプ１２の先端が所定位置まで適正に嵌入したか、各Ｏリング４は適正状態を維持しているか、固定リング５及び係止リング６は適正状態か、等が作業員によって目視出来、締着作業が容易となる。
尚、慣用の、給水管、給湯管は同色物であって、架橋ポリエチレン管は半透明、ポリブテン管はクリーム色であるが、本出願人が製造、販売している、リサイクルが可能で、可撓性が高い、エチレン．オクテン．コポリマー樹脂製の給水・給湯管を採用すれば、給水管はホワイトでの、給湯管はピンクでの半透明管である。 Therefore, at the time of connecting the plastic resin pipe 12 by the pipe joint, whether the tip of the plastic resin pipe 12 is properly fitted to a predetermined position, whether each O-ring 4 is maintained in an appropriate state, the fixing ring 5 and the locking ring Whether or not 6 is in an appropriate state can be visually checked by an operator, and fastening work is facilitated.
The conventional water supply pipes and hot water supply pipes are the same color, the cross-linked polyethylene pipes are translucent and the polybutene pipes are cream-colored. High flexibility, ethylene. Octene. If a water / hot water supply pipe made of copolymer resin is adopted, the water supply pipe is white and the hot water supply pipe is pink.

また、本発明にあって、固定リング５は、図６に示す如く、軸方向幅（前後方向幅）Ｗ５が、Ｏリング４域を覆う寸法を備え、且つ、内周面５ｄには複数本の周方向条溝５Ｇ´を備えているのが好ましい。
尚、Ｏリング４は、典型的には、５mm間隔の２本配置であり、内側のＯリング用係止溝９Ｇはインナーコア９の先端から１７mm置いた配置であり、固定リング５は後部に配置する係止リング６と一体化して、一体的に締着作用を奏するため、固定リング５の軸方向寸法Ｗ５（標準：１７mm）と係止リング６の幅方向寸法Ｗ６（標準：４mm）との合体寸法は２０mm前後であれば、インナーコア９の先端からＯリング配置域に亘る全域が安全に締着出来、固定リング５の幅Ｗ５は１６mm前後（標準：１７mm）であれば、Ｏリング４の配置域からインナーコア９の先端近傍に亘る締着が保証出来る。
また、内周面５ｄの周方向条溝５Ｇ´は、プラスチック樹脂パイプ外周面１２ｃに対する係止保持（引き抜け阻止）機能を奏すれば良く、条溝５Ｇ´の幅、深さ、間隔は、対象プラスチック樹脂パイプ１２に応じて適宜に決定すれば良いが、典型的には、図６（Ｃ）の如く、深さ０．３mm、幅０．３mmの内周溝を両側に２本、前面５Ｆ及び後面５Ｂから各３mm内側に配置する。 In the present invention, as shown in FIG. 6, the fixing ring 5 has an axial width (front-rear direction width) W5 that covers the O-ring 4 region, and a plurality of fixing rings 5 are provided on the inner peripheral surface 5d. It is preferable to provide the circumferential groove 5G ′.
The O-rings 4 are typically arranged at two intervals of 5 mm, the inner O-ring locking grooves 9G are arranged 17 mm from the tip of the inner core 9, and the fixing ring 5 is arranged at the rear. In order to integrate the locking ring 6 to be arranged and to perform an integral fastening action, the axial dimension W5 of the fixing ring 5 (standard: 17 mm) and the width dimension W6 of the locking ring 6 (standard: 4 mm) If the combined dimension is around 20 mm, the entire area from the tip of the inner core 9 to the O-ring arrangement area can be securely tightened. If the width W5 of the fixing ring 5 is around 16 mm (standard: 17 mm), the O-ring Fastening from the arrangement area of 4 to the vicinity of the tip of the inner core 9 can be guaranteed.
Further, the circumferential groove 5G ′ of the inner peripheral surface 5d only needs to have a function of holding and holding (preventing pull-out) with respect to the plastic resin pipe outer peripheral surface 12c, and the width, depth, and interval of the groove 5G ′ are as follows. It may be determined appropriately according to the target plastic resin pipe 12, but typically, as shown in FIG. 6 (C), two inner circumferential grooves having a depth of 0.3 mm and a width of 0.3 mm are provided on both sides. It is arranged 3 mm inside from 5F and the rear surface 5B.

従って、該固定リング５が、プラスチック樹脂パイプ１２の外周面１２ｃに対して、縮径して押圧作用を生ずれば、プラスチック樹脂パイプ１２の外周面１２ｃは、微視的には、圧縮弾性変形によって条溝５Ｇ´内に膨出形態で食い込み、固定リング５の樹脂パイプ１２に対する把持力が増大する。
そして、プラスチック樹脂パイプ１２は、固定リング５の押圧作用によって、内周面１２ｄが複数本の突出Ｏリング４に押圧され、外周面１２ｃが複数の条溝５Ｇ´内へ食い込み、且つ縮径したスリット５Ｇも係止作用に助力するため、固定リング５は、プラスチック樹脂パイプ１２に、Ｏリング４の配置域に亘る広い周面で、水密シール作用、及び引き抜け阻止作用を、面作用で付与することとなり、強固な水密押圧、及び強固な係止保持作用を果たす。 Accordingly, if the fixing ring 5 is reduced in diameter with respect to the outer peripheral surface 12c of the plastic resin pipe 12 to generate a pressing action, the outer peripheral surface 12c of the plastic resin pipe 12 is microscopically compressed and deformed. As a result, the groove 5G ′ bites into the groove 5G ′ and the gripping force of the fixing ring 5 on the resin pipe 12 increases.
The plastic resin pipe 12 has the inner peripheral surface 12d pressed against the plurality of protruding O-rings 4 by the pressing action of the fixing ring 5, and the outer peripheral surface 12c bites into the plurality of grooves 5G ′ and has a reduced diameter. Since the slit 5G also assists the locking action, the fixing ring 5 provides the plastic resin pipe 12 with a water-tight sealing action and a pull-out prevention action by a surface action over a wide peripheral surface over the O ring 4 arrangement area. As a result, a strong water-tight press and a strong locking and holding action are achieved.

また、本発明にあって、固定リング５は、図６に示す如く、前部外周に継手本体８のテーパー面ｔ８と整合する緩傾斜のテーパー面ｔａを、後部外周にキャップ３のテーパー面ｔ３と整合する急傾斜のテーパー面ｔｂを備え、後面５Ｂには、係止リング６嵌合用の、突出片５Ｐと欠け込みＣ５とを備え、且つ、キャップ３の挿入用孔Ｈ３と同径の挿入用孔Ｈ５を備えているのが好ましい。
この場合、固定リング５は、典型的には、図６（Ｃ）に示す如く、軸方向長さＷ５が１７mmであり、テーパー面ｔａの長さＷａが７mm、テーパー面ｔｂの長さＷｂが５mmであって、円筒部外周面５ｃの外径Ｒ５が２７．６mmで、中央部に径１７．６mmの挿入用孔が貫通し、且つ側面には割り溝形態の縮径用の小幅（標準：２．５mm）のスリット５Ｇを切開し、内周面５ｄには、幅０．３mm、深さ０．３mmの周方向条溝５Ｇ´を２本、前面５Ｆ及び後面５Ｂから３mm内方位置に配置したものである。 Further, in the present invention, as shown in FIG. 6, the fixing ring 5 has a gently inclined tapered surface ta aligned with the tapered surface t8 of the joint body 8 on the front outer periphery, and a tapered surface t3 of the cap 3 on the rear outer periphery. The rear surface 5B is provided with a protruding piece 5P and a notch C5 for fitting the locking ring 6 and having the same diameter as the insertion hole H3 of the cap 3 It is preferable to provide the hole H5.
In this case, typically, as shown in FIG. 6C, the fixing ring 5 has an axial length W5 of 17 mm, a tapered surface ta having a length Wa of 7 mm, and a tapered surface tb having a length Wb. An outer diameter R5 of the outer peripheral surface 5c of the cylindrical portion is 27.6 mm, an insertion hole having a diameter of 17.6 mm passes through the center portion, and a small width for reducing the diameter in the form of a split groove on the side surface (standard) : 2.5mm) slit 5G, and the inner circumferential surface 5d has two circumferential grooves 5G 'each having a width of 0.3 mm and a depth of 0.3 mm, 3 mm inwardly from the front surface 5F and the rear surface 5B. It is arranged in.

また、固定リング５の、前側のテーパー面ｔａ（標準：１／７勾配、７mm長）は、後側のテーパー面ｔｂ（標準：１／４勾配、５mm長）より緩傾斜で長いものである。
また、固定リング５は、後面５Ｂでは、図９（Ａ）に示す如く、外周のテーパー面ｔｂの内側に、係止リング６嵌入用の欠け込みＣ５を、欠け込みＣ５の内側に、係止斜板７当接用のテーパー面ｔ´５を内周に有する嵌合用の突出片５Ｐを備えたものである。 Further, the front tapered surface ta (standard: 1/7 gradient, 7 mm length) of the fixing ring 5 is slower and longer than the rear tapered surface tb (standard: 1/4 gradient, 5 mm length).
Further, as shown in FIG. 9A, the fixing ring 5 has a notch C5 for fitting the locking ring 6 on the inner side of the outer tapered surface tb and an inner side of the notch C5. A fitting protruding piece 5P having a tapered surface t′5 for contacting the swash plate 7 on the inner periphery is provided.

従って、図１（Ａ）の左半に示す如く、キャップ３を継手本体８に仮螺着した状態では、固定リング５の後部の欠け込みＣ５は、係止リング６の突出片６Ｐが嵌入可能に対向し、且つテーパー面ｔ´５が、係止リング６に嵌着した係止斜板７と対向し、外周のテーパー面ｔｂは、係止リング６の外周のテーパー面ｔｃと連続可能に対向して、キャップ３の後部のテーパー面ｔ３で姿勢の制御される状態となるため、固定リング５の挿入用孔Ｈ５は、係止リング６の挿入用孔Ｈ６と整合して、キャップ３の挿入用孔Ｈ３と整合位置を占め、プラスチック樹脂パイプ１２をキャップ３の後面３Ｂから挿入すれば、プラスチック樹脂パイプ１２は、縮径前の自由状態では、係止リング挿入用孔Ｈ６、固定リング挿入用孔Ｈ５共、キャップ挿入用孔Ｈ３と同口径（１７．６mm）であり、挿入用孔Ｈ３，Ｈ６，Ｈ５内をスムーズに貫通する。   Accordingly, as shown in the left half of FIG. 1A, when the cap 3 is temporarily screwed to the joint body 8, the protruding piece 6P of the locking ring 6 can be inserted into the notch C5 in the rear portion of the fixing ring 5. And the tapered surface t′5 faces the locking swash plate 7 fitted to the locking ring 6, and the outer tapered surface tb can be continuous with the outer tapered surface tc of the locking ring 6. Oppositely, since the posture is controlled by the tapered surface t3 at the rear portion of the cap 3, the insertion hole H5 of the fixing ring 5 is aligned with the insertion hole H6 of the locking ring 6, and If the plastic resin pipe 12 is inserted from the rear surface 3B of the cap 3 and occupies the alignment position with the insertion hole H3, the plastic resin pipe 12 is inserted into the locking ring insertion hole H6 and the fixing ring in the free state before the diameter reduction. Hole H5, cap insertion hole H And it has the same diameter (17.6 mm), through the insertion holes H3, H6, the H5 smoothly.

この場合、係止リング６に嵌着した係止斜板７は、先端縁ｅ７が係止リング６の挿入用孔Ｈ６（内径：１７．６mm）から径方向に微突出（標準：０．０５mm突出）しているが、プラスチック樹脂パイプ１２（標準外径：１７mm）の挿通を許容する。
そして、固定リング５の挿入用孔Ｈ５の口径は、係止リング６の挿入用孔Ｈ６の口径と共に、キャップ３の挿入用孔Ｈ３の口径と同径に設定することにより、固定リング５が、係止リング６と共に、必要最小限の縮径で、プラスチック樹脂パイプ１２の必要締付けを達成する。 In this case, the locking swash plate 7 fitted to the locking ring 6 has a tip edge e7 slightly protruding in the radial direction from the insertion hole H6 (inner diameter: 17.6 mm) of the locking ring 6 (standard: 0.05 mm). The plastic resin pipe 12 (standard outer diameter: 17 mm) can be inserted.
The diameter of the insertion hole H5 of the fixing ring 5 is set to the same diameter as the diameter of the insertion hole H3 of the cap 3 together with the diameter of the insertion hole H6 of the locking ring 6, so that the fixing ring 5 Together with the locking ring 6, the necessary tightening of the plastic resin pipe 12 is achieved with the minimum necessary diameter reduction.

そして、固定リング５のプラスチック樹脂パイプ１２への押圧締着作用は、キャップ３の急傾斜のテーパー面ｔ３からの、係止リング６の急傾斜のテーパー面ｔｃ及び固定リング５後部の急傾斜のテーパー面ｔｂを介して、固定リング５を係止リング６と一体的に合体前進させ、固定リング５の長くて、緩傾斜の前部テーパー面ｔａが、早期に継手本体８内へ圧接力を漸増しながら嵌入し、前部テーパー面ｔａが摩擦力の早期伝達を受けるため、固定リング５及び係止リング６がパイプ１２の表面と当接してパイプ外周面１２ｃから摩擦力を受ける段階では、もはや固定リング５は、一体化作用を奏する係止リング６と共に、後部のテーパー面ｔｂに対するキャップ３の回転摩擦力がスリップを生じる状態で押圧力作用のみを受ける。   The pressing and fastening action of the fixing ring 5 to the plastic resin pipe 12 is caused by the steeply tapered surface tc of the locking ring 6 and the steeply inclined rear part of the fixing ring 5 from the steeply tapered surface t3 of the cap 3. The fixing ring 5 is united and advanced together with the locking ring 6 through the taper surface tb, and the long and gently inclined front taper surface ta of the fixing ring 5 applies the pressure contact force into the joint body 8 at an early stage. Since the front tapered surface ta receives an early transmission of frictional force while gradually increasing, the fixing ring 5 and the locking ring 6 abut against the surface of the pipe 12 and receive the frictional force from the pipe outer peripheral surface 12c. The fixing ring 5 is only subjected to the pressing action in the state where the rotational frictional force of the cap 3 with respect to the tapered surface tb at the rear part causes a slip together with the locking ring 6 having an integral action.

そして、以降のキャップ３の回転による強固な前進締着作用時にあっても、固定リング５の前部の長寸（標準:７mm）且つ緩傾斜（１／７勾配）のテーパー面ｔａの継手本体テーパー面ｔ８との強力な摩擦力と、スリット５Ｇ及び内周面の条溝５Ｇ´のパイプ外周面１２ｃへの食い込みと、一体化した係止リング６のスリット６Ｇ及び係止斜板７のパイプ外周面１２ｃへの食い込みとによって、一体化した固定リング５と係止リング６とは、プラスチック樹脂パイプ１２に共廻り捩れを生ずること無く、パイプ１２を強固に押圧締着する。   The joint body of the tapered surface ta having a long length (standard: 7 mm) and a gentle slope (1/7 slope) of the front portion of the fixing ring 5 even during the subsequent forward fastening operation by the rotation of the cap 3. Strong frictional force with the taper surface t8, biting of the slit 5G and the groove 5G 'of the inner peripheral surface into the pipe outer peripheral surface 12c, the slit 6G of the integrated locking ring 6 and the pipe of the locking swash plate 7 Due to the biting into the outer peripheral surface 12c, the integrated fixing ring 5 and locking ring 6 co-rotate the plastic resin pipe 12 without causing twisting, and firmly press and fasten the pipe 12.

そして、インナーコア外周面９ｃから突出したＯリング４の配置域に対しては、固定リング５の長尺テーパー面ｔａと継手本体テーパー面ｔ８との協仂作用で、適正圧接力まで、即ちキャップ３の手動回転が固くなるまで、漸増加圧出来、且つ、管継手１の最外周はキャップ３で確保されるため、固定リング５は、プラスチック樹脂パイプ１２に対する最大圧接力の必要なＯリング４配置域では、漸増して所定圧力に達する押圧作用によって、パイプ１２に対する確実、安全なシール締着を提供する。   For the arrangement area of the O-ring 4 projecting from the outer peripheral surface 9c of the inner core, the proper pressure contact force, that is, the cap is obtained by the cooperative action of the long tapered surface ta of the fixing ring 5 and the joint body tapered surface t8. Since the pressure can be increased gradually until the manual rotation of 3 is hardened, and the outermost periphery of the pipe joint 1 is secured by the cap 3, the fixing ring 5 is an O-ring 4 that requires the maximum pressure contact force against the plastic resin pipe 12. In the arrangement area, a positive and safe seal fastening to the pipe 12 is provided by a pressing action that gradually increases to reach a predetermined pressure.

従って、プラスチック樹脂パイプ１２は、係止リング６と一体化した固定リング５での、前部テーパー面ｔａによる一義的で確実な押圧作用と、後部テーパー面ｔｂによる二義的押圧作用とにより、Ｏリング４への押圧シール作用、及びインナーコア外周面９ｃへの圧接によるシール作用と、係止リング６の縮径による一義的な係止斜板７のプラスチック樹脂パイプ１２の外周面１２ｃへの食い込みによる引き抜け防止の係止作用とを受けることとなる。
そのため、本発明の管継手は、所定のプラスチック樹脂パイプ１２を挿入して、キャップ３を手動で回転するだけで、接続パイプ１２に共廻り作用を付与することなく、シール作用、及び引き抜け防止作用を付与するものとなり、接続用のプラスチック樹脂パイプ１２を傷めることなく、ウォーターハンマーや熱膨張作用の反復にも耐えられる、確実な耐漏水シールを伴なう引き抜け防止の接続が達成出来る。 Therefore, the plastic resin pipe 12 has a unique and reliable pressing action by the front tapered surface ta and a secondary pressing action by the rear tapered surface tb in the fixing ring 5 integrated with the locking ring 6. The pressure sealing action to the O-ring 4 and the sealing action by pressure contact with the inner core outer peripheral surface 9c, and the unambiguous locking swash plate 7 due to the reduced diameter of the locking ring 6 to the outer peripheral surface 12c of the plastic resin pipe 12 The locking action prevents the pull-out by biting.
For this reason, the pipe joint of the present invention can be provided with a sealing action and a pull-out prevention without inserting a predetermined plastic resin pipe 12 and manually rotating the cap 3 without giving a joint action to the connection pipe 12. It is possible to achieve a pull-out preventing connection with a reliable leak-proof seal that can withstand repeated water hammer and thermal expansion without damaging the plastic resin pipe 12 for connection.

また、本発明にあっては、係止リング６は、図７に示す如く、後部外周にキャップ３のテーパー面ｔ３と整合する急傾斜のテーパー面ｔｃを、前部外周に、固定リング５の欠け込みＣ５に嵌入する突出片６Ｐを欠け込みＣ６によって形成し、欠け込みＣ６には、係止斜板７を弾性反撥力によって嵌着可能とするのが好ましい。
この場合、突出片６Ｐの形状は、固定リング５の後部の欠け込みＣ５の形状に応じて、相対的に決定すれば良く、欠け込みＣ６は、係止斜板７を嵌着した状態で係止リング６が固定リング５と当接一体化すれば、係止斜板７は、係止リング６の前部と固定リング５の後部とで挟着一体化構造となれば良い。 Further, in the present invention, as shown in FIG. 7, the locking ring 6 has a steeply inclined tapered surface tc aligned with the tapered surface t3 of the cap 3 on the outer periphery of the rear portion, and the fixing ring 5 on the outer periphery of the front portion. It is preferable that the protruding piece 6P fitted into the notch C5 is formed by the notch C6, and the locking swash plate 7 can be fitted to the notch C6 by elastic repulsion.
In this case, the shape of the protruding piece 6P may be determined relatively according to the shape of the notch C5 at the rear portion of the fixing ring 5, and the notch C6 is engaged with the locking swash plate 7 fitted. If the stop ring 6 abuts and integrates with the fixed ring 5, the locking swash plate 7 may have a sandwiched integrated structure between the front part of the locking ring 6 and the rear part of the fixed ring 5.

係止リング６は、典型的には、固定リング５と同一のプラスチック材の成形品であって、図９（Ｂ）に示す如く、欠け込みＣ６は下側のテーパー面ｔ´６を係止斜板７当接用に備え、係止斜板７をテーパー面ｔ´６面に配置すれば、係止斜板７の先端縁ｅ７が係止リング内周面６ｄから微突出（標準：０．０５mm突出）形態となる寸法である。
また、係止斜板７は、曲率半径が欠け込みＣ６の曲率半径より大であり、且つ弾性反撥力を発揮する板材であれば、金属板でもプラスチック板でも採用可能であり、係止斜板７として弾性板を採用し、係止斜板７の外径曲率半径を、欠け込みＣ６最内部の曲率半径より大としておけば、係止斜板７は弾性反撥力で欠け込みＣ６内に容易に嵌着出来、係止斜板７は、典型的には、０．３mm厚、２．９mm幅のステンレス鋼板の、断面裁頭円錐形で、平面Ｃ字形リング板である。 The locking ring 6 is typically a molded product of the same plastic material as the fixing ring 5, and as shown in FIG. 9B, the notch C 6 locks the lower tapered surface t ′ 6. If the locking swash plate 7 is disposed on the tapered surface t′6 in preparation for contacting the swash plate 7, the leading edge e7 of the locking swash plate 7 slightly protrudes from the locking ring inner peripheral surface 6d (standard: 0). .05 mm protrusion).
The locking swash plate 7 may be a metal plate or a plastic plate as long as it has a radius of curvature larger than the curvature radius of the cut-out C6 and exhibits elastic repulsion. If an elastic plate is adopted as 7 and the radius of curvature of the locking swash plate 7 is set larger than the radius of curvature of the innermost portion of the chipping C6, the locking swash plate 7 can easily enter the chipping C6 by elastic repulsion. The locking swash plate 7 is typically a 0.3 mm thick, 2.9 mm wide stainless steel plate with a truncated cone shape and a flat C-shaped ring plate.

従って、本発明の係止リング６は、管継手の組立時に、弾性を有する係止斜板７を縮径化湾曲して欠け込みＣ６内に嵌めれば、係止斜板７が弾性反撥力で嵌着保持出来て、組付け作業が容易であり、且つ管継手によるパイプ１２の接続持には、キャップ３の締付け作用で、係止リング６は突出片６Ｐが固定リング５の後部の欠け込みＣ５に嵌入して、係止リング６の固定リング５との一体化、及び係止斜板７の挟着確保状態での、係止リング６と固定リング５との一体化縮径部材としての縮径作用が保証され、係止斜板７によるプラスチック樹脂パイプ１２の抜脱阻止作用が保証される。   Therefore, the locking ring 6 according to the present invention is configured such that, when the pipe joint is assembled, the locking swash plate 7 is elastically repelled if the elastic locking swash plate 7 is bent in a reduced diameter and fitted into the notch C6. Can be attached and held easily, and the assembling work is easy, and in order to connect the pipe 12 by the pipe joint, the locking ring 6 has a protruding piece 6P due to the tightening action of the cap 3, and the rear part of the fixing ring 5 is missing. As an integrated reduced diameter member of the locking ring 6 and the fixing ring 5 in a state where the locking ring 6 is integrated with the fixing ring 5 and the locking swash plate 7 is securely clamped. The diameter reducing action of the plastic resin pipe 12 by the locking swash plate 7 is ensured.

また、本発明にあっては、固定リング５は、図９（Ａ）に示す如く、後面５Ｂ部で、外周のテーパー面ｔｂと内周のテーパー面ｔ´５との間に、上面のテーパー面ｔ５と、下面の水平面ｆ５と、内端の垂直辺５０とを備えた欠け込みＣ５を形成すると共に、欠け込みＣ５の下部を突出片５Ｐとし、係止リング６は、図９（Ｂ）に示す如く、前面６Ｆ部で、固定リング５の欠け込みＣ５に嵌合するための突出片６Ｐを、上面のテーパー面ｔ６と、前端の垂直辺６０と、下面の水平面ｆ６とで形成すると共に、突出片６Ｐの下方には、固定リング５のテーパー面ｔ´５に整合するテーパー面ｔ´６によって欠け込みＣ６を形成し、係止斜板７を係止リング６の欠け込みＣ６のテーパー面ｔ´６上に嵌着して、係止斜板７をテーパー面ｔ´６とテーパー面ｔ´５で押圧挟着するのが好ましい。   In the present invention, as shown in FIG. 9A, the fixing ring 5 has a taper on the upper surface between the outer taper surface tb and the inner taper surface t′5 at the rear surface 5B. A notch C5 having a surface t5, a horizontal surface f5 on the lower surface, and a vertical side 50 at the inner end is formed, and a lower portion of the notch C5 is formed as a protruding piece 5P, and the locking ring 6 is shown in FIG. As shown in FIG. 6, a protrusion 6P for fitting into the notch C5 of the fixing ring 5 at the front surface 6F is formed by an upper tapered surface t6, a front edge vertical side 60, and a lower horizontal surface f6. A notch C6 is formed below the protruding piece 6P by a taper surface t′6 aligned with the taper surface t′5 of the fixing ring 5, and the locking swash plate 7 has a taper of the notch C6 of the locking ring 6. The locking swash plate 7 is fitted onto the surface t′6 and the tapered surface t′6 and the taper. It is preferable to press and clamp at the surface t′5.

この場合、係止リング６の欠け込みＣ６の内面を規定するテーパー面ｔ´６、及び固定リング５の内周のテーパー面ｔ´５は、共に係止斜板７を挟着する面であるため、同角度（同一勾配）の整合テーパー面である。
また、係止斜板７は、テーパー面ｔ´６の円錐面に面嵌合し、係止リング６と共に縮径作用を生ずるものであるため、テーパー面ｔ´６の角度が大となれば、断面円錐形態の弾性板の縮径変位はテーパー面ｔ´６の縮径と不整合を生ずることとなるが、テーパー面ｔ´６の角度が４０〜５０°であれば、係止斜板７の自由状態での円錐形態の傾斜角θを、縮径による傾斜角増大分を見込んで、予めテーパー面ｔ´６の角度より小さく設定することにより対応すれば良い。 In this case, both the tapered surface t ′ 6 that defines the inner surface of the notch C 6 of the locking ring 6 and the inner tapered surface t ′ 5 of the fixing ring 5 are surfaces that sandwich the locking swash plate 7. Therefore, the matching tapered surfaces have the same angle (same gradient).
Further, since the locking swash plate 7 is surface-fitted to the conical surface of the tapered surface t′6 and produces a diameter reducing action together with the locking ring 6, if the angle of the tapered surface t′6 increases. The reduced diameter displacement of the elastic plate having a conical section forms a mismatch with the reduced diameter of the taper surface t′6, but if the angle of the taper surface t′6 is 40 to 50 °, the locking swash plate The inclination angle θ of the cone shape in the free state 7 may be dealt with by setting it to be smaller than the angle of the tapered surface t′6 in advance in consideration of the increase in the inclination angle due to the reduced diameter.

そして、係止斜板７は、典型的には、０．３mm厚のステンレス鋼板で、幅２．９mmであって、自由状態では、図８に示す如く、内径ｄａが２２mm、外径ｄｂが２７．８mm、開放端間隔７Ｇが２０mmであって、高さ１mmの裁頭円錐形態であり、係止リング６の欠け込みＣ６に弾性反撥力で嵌着した状態では、内径ｄａが１７．５mmに弾性縮径し、高さｈ７が２mmとなって係止リング６の内周面６ｄから内端（先端）縁ｅ７が微突出（標準：０．０５mm突出）するものであり、勾配１（４５°）のテーパー面ｔ´６の幅（標準：２．８mm）から延長形態で斜め前方に微突出（標準：０．１mm突出）するものである。
尚、係止斜板７の配置角度、即ち係止リング６のテーパー面ｔ´６及び固定リング５のテーパー面ｔ´５の傾斜勾配は、係止斜板７の嵌着作業性及び対象締着パイプに応じて決定すれば良いが、典型的には勾配１（４５°）である。 The locking swash plate 7 is typically a 0.3 mm thick stainless steel plate having a width of 2.9 mm. In a free state, the inner diameter da is 22 mm and the outer diameter db is as shown in FIG. 27.8 mm, open end interval 7 G is 20 mm, and a truncated cone shape with a height of 1 mm. When the engagement ring 6 is fitted into the notch C 6 with elastic repulsion, the inner diameter da is 17.5 mm. The inner edge (tip) edge e7 slightly protrudes from the inner peripheral surface 6d of the locking ring 6 (standard: 0.05 mm protrusion), and has a gradient 1 (height h7 is 2 mm). 45 °) which slightly protrudes forward (standard: 0.1 mm) in an extended form from the width (standard: 2.8 mm) of the tapered surface t′6.
Note that the arrangement angle of the locking swash plate 7, that is, the inclination gradient of the tapered surface t ′ 6 of the locking ring 6 and the tapered surface t ′ 5 of the fixing ring 5, depends on the fitting workability and the target tightening of the locking swash plate 7. Although it may be determined according to the arrival pipe, the gradient is typically 1 (45 °).

従って、該係止斜板７を、係止リング６の欠け込みＣ６に弾性縮径して嵌着すれば、図１（Ｂ）に示す如く、欠け込みＣ６の内周の前方へ傾斜縮径する円錐状テーパー面ｔ´６に着座して、係止斜板７の基端縁ｂ７が欠け込みＣ６の最奥位置に弾撥作用で係止し、先端縁ｅ７は、テーパー面ｔ´６からテーパー面ｔ´６に沿って微小傾斜突出（標準：０．１mm）して係止リング内周面６ｄから内方に微小（標準：０．０５mm）突出する。   Therefore, if the locking swash plate 7 is fitted into the notch C6 of the locking ring 6 with an elastic diameter reduced, the diameter of the inclined swash plate 7 is reduced toward the front of the inner periphery of the notch C6 as shown in FIG. The base end edge b7 of the locking swash plate 7 is notched and locked at the innermost position of C6 by elastic action, and the leading edge e7 is tapered to the tapered surface t'6. From the inner circumferential surface 6d of the locking ring and protrudes inward (standard: 0.05 mm) by a slight inclination along the taper surface t'6 (standard: 0.1 mm).

そして、図１に示す如く、係止斜板７を嵌着した係止リング６の前面６Ｆを固定リング５の後面５Ｂに対向して係止リング６及び固定リング５をキャップ３内に収納した管継手１にプラスチック樹脂パイプ１２（標準外径：１７mm）を挿入すれば、係止斜板７の先端縁ｅ７はパイプ１２の挿通を許容する。
そして、キャップ３を回動前進させれば、係止リング６の突出片６Ｐは、固定リング５の後面の欠け込みＣ５内に、テーパー面ｔ６がテーパー面ｔ５に面当接し、水平面ｆ６が水平面ｆ５に面当接する形態で嵌入し、固定リング５の欠け込みＣ６には、係止斜板７を挟着する形態で固定リング５の突出片５Ｐが嵌入して、係止リング６と固定リング５とは一体化して一体的縮径部材として作動し、キャップ３の前進による押圧前進作用を受ける。 Then, as shown in FIG. 1, the locking ring 6 and the fixing ring 5 are accommodated in the cap 3 with the front surface 6F of the locking ring 6 fitted with the locking swash plate 7 facing the rear surface 5B of the fixing ring 5. If a plastic resin pipe 12 (standard outer diameter: 17 mm) is inserted into the pipe joint 1, the leading edge e7 of the locking swash plate 7 allows the pipe 12 to be inserted.
When the cap 3 is rotated and advanced, the protruding piece 6P of the locking ring 6 has a taper surface t6 in contact with the taper surface t5 in the notch C5 on the rear surface of the fixing ring 5, and a horizontal plane f6 is a horizontal plane. The fixing ring 5 is fitted in the form of surface contact, and the notch C6 of the fixing ring 5 is fitted with the protruding piece 5P of the fixing ring 5 so as to sandwich the locking swash plate 7, and the locking ring 6 and the fixing ring are inserted. 5 is integrated and operates as an integral diameter-reducing member, and receives a pressing forward action by the forward movement of the cap 3.

従って、キャップ３の締着作用持には、係止リング６の突出片６Ｐと固定リング５の欠け込みＣ５とが整合嵌合し、係止リング６の欠け込みＣ６と固定リング５の突出片５Ｐとが整合嵌合するため、係止リング６と、固定リング５とは、一体となって前進作用及び縮径作用を受け、プラスチック樹脂パイプ１２に共廻りを生じないで締着出来、固定パイプ５の後部に係止リング６を配置したことにより、固定リング５及び係止リング６は、プラスチック樹脂パイプ１２に共廻りを生ずることなく、且つ、嵌合した係止リング６と固定リング５間に挟着確保されて姿勢の固定された係止斜板７の突出先端縁ｅ７が、パイプ１２の外周面１２ｃに、パイプ１２の抜脱を阻止する斜向食い込みを生ずることにより、パイプ１２の抜脱も、確実、強固に阻止出来る。   Therefore, for the fastening action of the cap 3, the protruding piece 6P of the locking ring 6 and the notch C5 of the fixing ring 5 are aligned and fitted, and the notch C6 of the locking ring 6 and the protruding piece of the fixing ring 5 are fitted. Since the 5P is aligned and fitted, the locking ring 6 and the fixing ring 5 are integrally subjected to a forward action and a diameter reducing action, and can be fastened and fixed without causing the plastic resin pipe 12 to rotate together. By disposing the locking ring 6 at the rear part of the pipe 5, the fixing ring 5 and the locking ring 6 do not rotate around the plastic resin pipe 12, and the locked locking ring 6 and the fixing ring 5 are fitted. The projecting tip edge e7 of the locking swash plate 7 that is secured and fixed in between causes the pipe 12 to be bite into the outer peripheral surface 12c of the pipe 12 to prevent the pipe 12 from being pulled out. Removable, sure and strong Prevention can be.

また、本発明は、図１に示す如く、インナーコア９及び継手本体８が長手方向に左右対称構造のソケット形態であって、両側からキャップ３を嵌合して、両側からプラスチック樹脂パイプ１２を挿入接続するのが好ましい。
この場合、継手本体８及びインナーコア９は、図１に示す如く、長手方向に左右対称形態で準備し、固定リング５と係止リング６とを嵌合内包したキャップ３を、継手本体８の両端に嵌合仮螺着しておけば、該管継手は、両側からのプラスチック樹脂パイプ１２の挿入接続が可能となる。
従って、該左右対称の両頭形態のソケット型管継手は、プラスチック樹脂パイプ１２の長尺化継手として有効である。 In the present invention, as shown in FIG. 1, the inner core 9 and the joint body 8 are sockets having a symmetrical structure in the longitudinal direction. The cap 3 is fitted from both sides, and the plastic resin pipe 12 is attached from both sides. An insertion connection is preferred.
In this case, as shown in FIG. 1, the joint body 8 and the inner core 9 are prepared in a symmetrical form in the longitudinal direction, and the cap 3 in which the fixing ring 5 and the locking ring 6 are fitted and enclosed is attached to the joint body 8. By fitting and screwing at both ends, the pipe joint can be inserted and connected to the plastic resin pipe 12 from both sides.
Therefore, the symmetrical double-headed socket-type pipe joint is effective as an elongated joint of the plastic resin pipe 12.

また、本発明は、図１０に示す如く、継手本体８がエルボ形態であって、一端の管継手に、プラスチック樹脂パイプ１２を接続締着可能とし、エルボ管１０の他端内面には接続用ねじ面１０Ｓを備えたものが好ましい。
この場合、継手本体８は、一半には管継手構造を、他半には屈曲エルボ管１０を一体化成形で形成すれば良く、インナーコア９は、図１０（Ａ）に示す如く、継手本体の管継手構造に対応する寸法に準備すれば良い。
従って、本発明の管継手を採用すれば、一端にはプラスチック樹脂パイプ１２がワンタッチ操作で接続出来、他端には端末機器としての図示しない水栓、又はソケットが接続出来るため、プラスチック樹脂パイプ１２を採用した配管施工に有効である。 Further, according to the present invention, as shown in FIG. 10, the joint body 8 has an elbow shape, and a plastic resin pipe 12 can be connected and fastened to a pipe joint at one end. What provided the screw surface 10S is preferable.
In this case, the joint body 8 may be formed by integrally forming a pipe joint structure in one half and a bent elbow pipe 10 in the other half, and the inner core 9 has a joint body as shown in FIG. What is necessary is just to prepare for the dimension corresponding to this pipe joint structure.
Therefore, if the pipe joint of the present invention is adopted, the plastic resin pipe 12 can be connected to one end by a one-touch operation, and a water tap or socket (not shown) as a terminal device can be connected to the other end. It is effective for pipe construction that adopts.

本発明の管継手は、継手本体８の端部に嵌着したキャップ３からプラスチック樹脂パイプ１２をインナーコア９の外周に沿って、継手本体８とインナーコア９との隙間ｄｇに挿入し、キャップ３を継手本体８に、手動で回転螺合するだけで、プラスチック樹脂パイプ１２が、固定リング５と、係止斜板７を備えた係止リング６との一体化縮径によって、インナーコア９外周面９ｃに強圧確保出来て、流水管としてのインナーコア９に対して、水密的に、且つ引き抜けの怖れもなく、強固に接続出来る。   In the pipe joint of the present invention, the plastic resin pipe 12 is inserted into the gap dg between the joint body 8 and the inner core 9 along the outer periphery of the inner core 9 from the cap 3 fitted to the end of the joint body 8. 3 is simply manually screwed into the joint body 8, so that the plastic resin pipe 12 is integrated into the inner core 9 by reducing the diameter of the fixing ring 5 and the locking ring 6 having the locking swash plate 7. A strong pressure can be secured on the outer peripheral surface 9c, and the inner core 9 as the water pipe can be firmly connected in a watertight manner without fear of pulling out.

そして、プラスチック樹脂パイプ１２は、巻癖の付いた状態、即ち、湾曲癖や楕円変形癖の付いた状態であっても、管継手内への挿入は、インナーコア９への被覆嵌入であるため、可撓性のパイプ１２は、断面真円形態に修正されながら挿入され、インナーコア９の外周面９ｃに配置したＯリング４上を平滑に通過して、Ｏリング４が抜脱や損傷を受けないため、固定リング５及び係止リング６によるプラスチック樹脂パイプ１２のインナーコア９外周面９ｃへの押圧は、所定の水密押圧を達成する。   And even if the plastic resin pipe 12 is in a state with a curl hook, that is, in a state with a curved hook or an elliptical deformation hook, the insertion into the pipe joint is a covering fit into the inner core 9. The flexible pipe 12 is inserted while being corrected to have a perfect circular cross section, and passes smoothly over the O-ring 4 disposed on the outer peripheral surface 9c of the inner core 9, so that the O-ring 4 is removed or damaged. Since it does not receive, the press to the outer peripheral surface 9c of the inner core 9 of the plastic resin pipe 12 by the fixing ring 5 and the locking ring 6 achieves a predetermined watertight press.

また、キャップ３の継手本体８への回転螺合前進作用は、キャップ３の螺合前進で縮径する、前後にテーパー面ｔａ，ｔｂを備えた固定リング５を前側とし、後部にテーパー面ｔｃを備え、前部に係止斜板７を嵌着した係止リング６を後側として、継手本体８とキャップ３間に介在したことにより、プラスチック樹脂パイプ１２に共廻り捩れを付与することなく、プラスチック樹脂パイプ１２をインナーコア９の外周面９ｃに、強固に、水密的に締着出来、係止リング６と固定リング５とで挟着されて姿勢制御された係止斜板７が、プラスチック樹脂パイプ１２の外周面１２ｃに食い込んで係止することにより、抜脱の怖れの無い状態でプラスチック樹脂パイプ１２を圧接止着出来、キャップ３を手動回転で締着するだけのワンタッチ操作によって、耐用中のウォーターハンマー作用や熱膨張作用の反復作用にも対抗出来る、信頼性に富む、完全な、水密的締着が可能となる。   In addition, the rotational screwing forward action of the cap 3 to the joint body 8 is such that the fixing ring 5 having front and rear tapered surfaces ta and tb, which is reduced in diameter by the forward screwing of the cap 3, is the front side, and the tapered surface tc is the rear side. With the locking ring 6 fitted with the locking swash plate 7 on the front side and being interposed between the joint body 8 and the cap 3, the plastic resin pipe 12 is not twisted together. The locking swash plate 7 can be firmly and watertightly fastened to the outer peripheral surface 9c of the inner core 9 and is clamped between the locking ring 6 and the fixing ring 5 to control the posture. By biting into the outer peripheral surface 12c of the plastic resin pipe 12 and locking it, the plastic resin pipe 12 can be pressed and fastened without fear of detachment, and the cap 3 can be fastened by manual rotation. I, can also be counter to the repeated action of water hammer effects and thermal expansion effects during life, rich in reliability, complete, it is possible to watertight manner fastening.

本発明を、ＪＩＳ規格の呼び径１３Ａで、外径が１７mm、内径が１３mmのプラスチック樹脂パイプに適用するソケット型管継手１として実施形態を説明する。
図１（Ａ）は、ソケット型管継手１の縦断断面図であって、図１（Ａ）に於いて、右側の管継手はパイプ１２を接続した状態を、左側の管継手はパイプ挿入寸前の状態を示す図であり、図１（Ｂ）は、図１（Ａ）のＢ部拡大図であり、図１（Ｃ）は、図１（Ａ）のＣ部拡大図である。
ソケット型管継手１は、図１（Ａ）に示す如く、通水孔Ｈ９を備えたインナーコア９の外周に継手本体８を螺着し、固定リング５を前側に、係止斜板７を嵌着した係止リング６を後側に、嵌合内包したキャップ３を継手本体８の端部外周に螺合するものである。 An embodiment will be described as a socket-type pipe joint 1 applied to a plastic resin pipe having a nominal diameter 13A of JIS standard, an outer diameter of 17 mm, and an inner diameter of 13 mm.
FIG. 1A is a longitudinal sectional view of a socket-type pipe joint 1. In FIG. 1A, the right pipe joint is in a state where a pipe 12 is connected, and the left pipe joint is just before pipe insertion. FIG. 1B is an enlarged view of a portion B in FIG. 1A, and FIG. 1C is an enlarged view of a portion C in FIG. 1A.
As shown in FIG. 1 (A), the socket-type pipe joint 1 has a joint body 8 screwed onto the outer periphery of an inner core 9 provided with a water passage hole H9, a fixing ring 5 on the front side, and a locking swash plate 7 on the outer side. The fitted locking ring 6 is screwed to the rear side, and the cap 3 including the fitting is screwed to the outer periphery of the end of the joint body 8.

〔インナーコア９（図４）〕
図４はインナーコア９の説明図であって、（Ａ）は縦断側面図、（Ｂ）は側面図である。
インナーコア９は、透明で、ポリエーテルイミド樹脂（商品名：ウルテム樹脂）製の、一般肉厚が３mmのパイプ形状成形品であり、全長Ｌ９が９８mm、通水孔Ｈ９となる内径Ｒ９”は６．７mm、外径Ｒ９´は１２．６mmであって、円筒中央部外周には径Ｒ９が２０mmの膨出厚肉部を有し、該膨出厚肉部外周面には、長さ１８mmに亘るねじ面９Ｓを備え、インナーコア外周面９ｃから膨出ねじ面９Ｓに亘って、高さ３．６５mmの段部ｄ９を備えている。
また、両端外周には、プラスチック樹脂パイプ１２への挿入を円滑にするための１／３勾配のテーパー面ｔ９を付設し、外周面９ｃの段部ｄ９と先端との中間位置には、Ｏリング４を嵌入するための、幅２．５mm、深さ１．４mmの係止溝９Ｇを間隔Ｌ９´が５mmで２本配置したものである。 [Inner core 9 (FIG. 4)]
4A and 4B are explanatory views of the inner core 9, wherein FIG. 4A is a longitudinal side view, and FIG. 4B is a side view.
The inner core 9 is transparent, made of polyetherimide resin (trade name: Ultem resin), and is a pipe-shaped molded product having a general thickness of 3 mm. The total length L9 is 98 mm, and the inner diameter R9 ″ is the water passage hole H9. 6.7 mm, outer diameter R9 ′ is 12.6 mm, and the outer periphery of the central portion of the cylinder has a bulging thick portion with a diameter R9 of 20 mm, and the outer peripheral surface of the bulging thick portion has a length of 18 mm. And a step portion d9 having a height of 3.65 mm is provided from the inner core outer peripheral surface 9c to the bulging screw surface 9S.
Further, a taper surface t9 having a 1/3 gradient for facilitating insertion into the plastic resin pipe 12 is attached to the outer periphery of both ends, and an O-ring is provided at an intermediate position between the step portion d9 and the tip of the outer peripheral surface 9c. In this example, two locking grooves 9G having a width of 2.5 mm and a depth of 1.4 mm for inserting 4 are arranged with a distance L9 ′ of 5 mm.

〔継手本体８（図２）〕
図２は継手本体の説明図であって、（Ａ）は縦断側面図、（Ｂ）は端面図、（Ｃ）は側面図である。
継手本体８は、インナーコア９同様に、透明で、一般肉厚４mmのポリエーテルイミド樹脂（商品面：ウルテム樹脂）製のパイプ形状成形品であり、外周面８ｃの両側には、キャップ３を、緩みを生じないように螺合するための、ねじ間隔の短いメートル細目ねじ（ＪＩＳＢ０２０７）を、外周面８ｃよりねじ山が突出する形態でねじ面８Ｓを配設し、また外周面８ｃ中央には、インナーコア取付時に、継手本体８の回動を抑止する治具（レンチ等）当接用の平坦面８ｆを表裏に対称配置し、内周面８ｄの長さ方向中央部には、インナーコア９螺着用のねじ面８Ｓ´を内周面８ｄから突出形態で配置した。 [Fitting body 8 (Fig. 2)]
2A and 2B are explanatory views of the joint body, in which FIG. 2A is a longitudinal side view, FIG. 2B is an end view, and FIG. 2C is a side view.
Like the inner core 9, the joint body 8 is a pipe-shaped molded product made of polyetherimide resin (product surface: Ultem resin) with a general thickness of 4 mm. Caps 3 are provided on both sides of the outer peripheral surface 8c. A screw thread 8S is arranged in a form in which a thread thread protrudes from the outer peripheral surface 8c, and a metric fine screw (JISB0207) with a short screw interval for screwing so as not to loosen, and at the center of the outer peripheral surface 8c. When the inner core is attached, a flat surface 8f for contacting a jig (wrench or the like) that prevents the joint body 8 from rotating is arranged symmetrically on the front and back, and the inner peripheral surface 8d A threaded surface 8S ′ for screwing the core 9 is arranged in a protruding form from the inner peripheral surface 8d.

また、内周面両端には、固定リング５が嵌合する長さＬ８´が７mmの嵌合孔Ｈ８´を、ストッパー機能を奏するストッパー面ｓｔを介して外方に拡開形態で配置し、該嵌合孔Ｈ８´の外方に拡開する内周面をテーパー面ｔ８とした。
そして、テーパー面ｔ８は、長さＬ８´が７mmで、内端径が２１．６mm、外端径が２２．４mmで形成した。
継手本体８の寸法関係は、外径Ｒ８が２６．４mm、全長Ｌ８が７３mmで、中央には径Ｒ８´が１９．６mmで貫通する挿入用孔Ｈ８を備え、内周面８ｄの長さ方向中央部には、長さ１８mmに亘って、インナーコア螺着用のねじ面８Ｓ´を内周面８ｄから突設形態で配置し、外周面両側のねじ面８Ｓは、先端から長さ（Ｌ８´）７mmを置いて、長さ１２mmの範囲に配置した。 Further, at both ends of the inner peripheral surface, a fitting hole H8 ′ having a length L8 ′ with which the fixing ring 5 is fitted is 7 mm is arranged in an outwardly expanded form through a stopper surface st having a stopper function, The inner peripheral surface that expands outward from the fitting hole H8 ′ is defined as a tapered surface t8.
The tapered surface t8 was formed with a length L8 ′ of 7 mm, an inner end diameter of 21.6 mm, and an outer end diameter of 22.4 mm.
The dimensional relationship of the joint body 8 is that the outer diameter R8 is 26.4 mm, the total length L8 is 73 mm, the center is provided with an insertion hole H8 with a diameter R8 ′ of 19.6 mm, and the length of the inner peripheral surface 8d. In the center portion, a screw surface 8S ′ for inner core screwing is arranged in a projecting form from the inner peripheral surface 8d over a length of 18 mm, and the screw surfaces 8S on both sides of the outer peripheral surface have a length (L8 ′) from the tip. ) 7 mm was placed and placed in a range of 12 mm in length.

〔キャップ３（図３）〕
図３（Ａ）はキャップ３の後面図、図３（Ｂ）は縦断側面図である。
キャップ３は、透明なポリフェニレンオキサイド樹脂（商品名：ノリル樹脂）成形品であって、図３（Ａ）に示す如く、有蓋パイプ形状であって、外周面３ｃには手動回転の滑り止め用に、長手方向の突起３Ｐを六角形状に配置し、後面３Ｂの蓋面には、プラスチック樹脂パイプ１２を挿入するための、円形状の、径Ｒ３´が１７．６mmの挿入用孔Ｈ３を有し、キャップ３内面は内径Ｒ３”が２８mmの継手本体嵌合孔Ｈ３”を備え、前面３Ｆより若干（標準：１mm）内側から内周面３ｄには、継手本体８螺合用の、メートル細目ねじ３Ｓ（ＪＩＳＢ０２０７）を前後１２mmに亘って備え、後面３Ｂ内側には、固定リング５のテーパー面ｔｂ当接用のテーパー面ｔ３を備えたものである。 [Cap 3 (Fig. 3)]
3A is a rear view of the cap 3, and FIG. 3B is a longitudinal side view.
The cap 3 is a molded product of transparent polyphenylene oxide resin (trade name: Noryl resin), and has a covered pipe shape as shown in FIG. 3A. The protrusion 3P in the longitudinal direction is arranged in a hexagonal shape, and the lid surface of the rear surface 3B has a circular insertion hole H3 with a diameter R3 ′ of 17.6 mm for inserting the plastic resin pipe 12. The inner surface of the cap 3 is provided with a fitting main body fitting hole H3 ″ having an inner diameter R3 ″ of 28 mm. (JISB0207) is provided over 12 mm in the front and rear, and a tapered surface t3 for contacting the tapered surface tb of the fixing ring 5 is provided inside the rear surface 3B.

パイプ形状のキャップ３は、一般肉厚３．５mmで、長さＬ３が３８mm、円筒外周面３ｃの直径Ｒ３が３５mmであって、外周面３ｃには、幅５mm、突出高さｄ３が１．５mmの長さ方向突起３Ｐを、六角形状に等間隔に備え、後面３Ｂ中央の挿入用孔Ｈ３の径Ｒ３´は１７．６mmであり、内周面３ｄ前部のねじ面３Ｓは、幅１２mmに亘るピッチ間隔１．５mm、高さ０．８mmのメートル細目ねじ面であり、内周面後面のテーパー面ｔ３は、内周径（Ｒ３”）２８mmから１／４勾配、長さ８mmで後方に縮径する裁頭円錐面である。     The pipe-shaped cap 3 has a general thickness of 3.5 mm, a length L3 of 38 mm, and a diameter R3 of the cylindrical outer peripheral surface 3c of 35 mm. The outer peripheral surface 3c has a width of 5 mm and a protruding height d3 of 1. 5 mm lengthwise projections 3P are provided in a hexagonal shape at equal intervals, the diameter R3 ′ of the insertion hole H3 in the center of the rear surface 3B is 17.6 mm, and the thread surface 3S in the front part of the inner peripheral surface 3d has a width of 12 mm. This is a metric fine thread surface with a pitch interval of 1.5 mm and a height of 0.8 mm. The tapered surface t3 on the rear surface of the inner peripheral surface is a 1/4 gradient from the inner peripheral diameter (R3 ″) of 28 mm, and the rear is 8 mm in length. It is a truncated conical surface that is reduced in diameter.

〔Ｏリング４（図５）〕
図５（Ａ）は、Ｏリングの正面図であり、図５（Ｂ）はＯリングの縦断側面図である。
Ｏリング４は、インナーコア９の、幅２．５mm、深さ１．４mmの係止溝９Ｇに嵌入装着するシール部材であり、耐摩耗性、耐熱性に優れたニトリルゴム（ＪＩＳＢ２４０１）の断面太さＷ４が１．９mm、内径Ｒ４が９．８mmの断面円形リングであり、黒色に着色（原液染め着色）したものである。 [O-ring 4 (Fig. 5)]
5A is a front view of the O-ring, and FIG. 5B is a vertical side view of the O-ring.
The O-ring 4 is a seal member that is fitted in and attached to a locking groove 9G having a width of 2.5 mm and a depth of 1.4 mm of the inner core 9, and is a cross section of a nitrile rubber (JISB2401) having excellent wear resistance and heat resistance. It is a circular ring with a cross section having a thickness W4 of 1.9 mm and an inner diameter R4 of 9.8 mm, and is colored black (colored with a stock solution).

〔固定リング５（図６、図９（Ａ））〕
図６は、固定リング５の説明図であって、（Ａ）は側面図、（Ｂ）は前面図、（Ｃ）は縦断面図、図９（Ａ）は、図６（Ｃ）の部分拡大図である。
固定リング５は着色透明のポリフェニレンオキサイド樹脂（商品名：ノリル樹脂）製の成形品であって、全体形状は、図６（Ｃ）に示す如く、中央には、プラスチック樹脂パイプ１２を挿入するための、直径Ｒ５´が１７．６mmの挿入用孔Ｈ５を備え、前後方向幅Ｗ５が１７mmで、外周面５ｃには、前面５Ｆから中央部へ拡径する勾配１／７の円錐テーパー面ｔａを、継手本体８のテーパー面ｔ８と整合する形態に、長さＷａが７mmで備え、後面５Ｂからは、中央部へ拡径する勾配１／４の円錐テーパー面ｔｂを、キャップ３の後面内周のテーパー面ｔ３に整合する形態に、長さＷｂが５mmで備え、後面には係止リング嵌合用の欠け込みＣ５と突出片５Ｐとを備えている。 [Fixing ring 5 (FIGS. 6, 9A)]
6A and 6B are explanatory views of the fixing ring 5, in which FIG. 6A is a side view, FIG. 6B is a front view, FIG. 6C is a longitudinal sectional view, and FIG. It is an enlarged view.
The fixing ring 5 is a molded product made of colored transparent polyphenylene oxide resin (trade name: Noryl resin), and the overall shape is as shown in FIG. 6C for inserting a plastic resin pipe 12 in the center. Provided with an insertion hole H5 having a diameter R5 ′ of 17.6 mm, a width W5 in the front-rear direction of 17 mm, and an outer peripheral surface 5c having a conical taper surface ta having a gradient 1/7 that expands from the front surface 5F to the central portion. The conical taper surface tb having a length Wa of 7 mm is provided in a form aligned with the tapered surface t8 of the joint body 8, and a conical taper surface tb having a gradient 1/4 expanding to the central portion is provided from the rear surface 5B. The length Wb is 5 mm, and the rear surface is provided with a notch C5 and a protruding piece 5P for engaging the locking ring.

後面５Ｂの欠け込みＣ５及び突出片５Ｐは、図９（Ａ）に示す如く、外周面のテーパー面ｔｂと同一勾配で内方へ傾斜したテーパー面ｔ５と、垂直辺５０と、水平面ｆ５とで奥行き幅ＷＣが２mmの欠け込みＣ５を形成し、欠け込みＣ５の下部に内方へ傾斜縮径する幅２．８mmのテーパー面ｔ´５を勾配１（４５°）で形成し、欠け込みＣ５の水平面ｆ５とテーパー面ｔ´５とで幅ＷＣが２mmの断面三角形突出片５Ｐとしたものである。   As shown in FIG. 9A, the notch C5 and the protruding piece 5P of the rear surface 5B are formed by a tapered surface t5 inclined inward at the same gradient as the tapered surface tb of the outer peripheral surface, a vertical side 50, and a horizontal plane f5. A notch C5 having a depth width WC of 2 mm is formed, and a tapered surface t′5 having a width of 2.8 mm that is inclined and contracted inward is formed at a lower portion of the notch C5 with a gradient 1 (45 °). The horizontal plane f5 and the tapered surface t′5 are formed into a triangular projection piece 5P having a width WC of 2 mm.

そして、固定リング５に外圧が付加されれば縮径するための、小幅（標準:２．５mm）の切開されたスリット５Ｇを、図６（Ａ）の如く、全長に亘る割り溝形態で備えており、内周面５ｄには、縮径してプラスチック樹脂パイプ１２の外周面１２ｃを押圧すればプラスチック樹脂パイプ外周面１２ｃが弾性変形で食い込むための、周方向の２本の小条溝（標準：深さ０．３mm、幅０．３mm）を、内周面５ｄの前面５Ｆから３mm、及び後面５Ｂから３mm位置に配設したものである。   Then, a slit (5G) having a small width (standard: 2.5 mm) in order to reduce the diameter when external pressure is applied to the fixing ring 5 is provided in a split groove shape over the entire length as shown in FIG. 6 (A). In the inner peripheral surface 5d, if the outer peripheral surface 12c of the plastic resin pipe 12 is reduced in diameter and pressed, the outer peripheral surface 12c of the plastic resin pipe bites in due to elastic deformation (two circumferential grooves ( Standard: depth 0.3 mm, width 0.3 mm) are arranged at positions of 3 mm from the front surface 5F and 3 mm from the rear surface 5B of the inner peripheral surface 5d.

〔係止リング（図７、図９（Ｂ））〕
係止リング６は、図１に示す如く、前面に係止斜板を嵌着して固定リング５の後部に配置するものであって、図７は係止リングの説明図であり、（Ａ）は側面図、（Ｂ）は後面図、（Ｃ）は縦断面図であり、図９（Ｂ）は、図７（Ｃ）の部分拡大図である。
係止リング６は、固定リング同様に、着色透明のポリフェニレンオキサイド樹脂（商品面：ノリル樹脂）製の成形品であって、全体形状は、図７に示す如く、中央には、プラスチック樹脂パイプ１２を挿入するための、直径Ｒ´が１７．６mmの挿入用孔Ｈ６を備え、前後方向幅Ｗ６が４mm、外径Ｒ６が２５．１mmで、外周面６ｃには、後側の半幅（１／２ Ｗ６）に、固定リング後部外周のテーパー面ｔｂと整合連続する、テーパー面ｔｃを、前側の半幅に、固定リング後部の欠け込みＣ５のテーパー面ｔ５と整合当接する、テーパー面ｔ６を各半幅（標準：２mm）で備えている。 [Locking ring (FIGS. 7 and 9B)]
As shown in FIG. 1, the locking ring 6 is provided with a locking swash plate fitted on the front face and disposed at the rear of the fixing ring 5. FIG. 7 is an explanatory view of the locking ring. ) Is a side view, (B) is a rear view, (C) is a longitudinal sectional view, and FIG. 9 (B) is a partially enlarged view of FIG. 7 (C).
Like the fixing ring, the locking ring 6 is a molded product made of colored transparent polyphenylene oxide resin (product surface: Noryl resin). The overall shape of the locking ring 6 is as shown in FIG. Insertion hole H6 having a diameter R ′ of 17.6 mm, a width W6 in the front-rear direction of 4 mm, an outer diameter R6 of 25.1 mm, and a half width (1 / 2 W6), the tapered surface tc, which is aligned and continuous with the tapered surface tb on the outer periphery of the rear portion of the fixed ring, is aligned with the tapered surface t5 of the notch C5 at the rear portion of the fixed ring, and is aligned with the tapered surface t6. (Standard: 2 mm).

また、前側の外周テーパー面ｔ６と、先端垂直辺６０と、下面の水平面ｆ６とで、係止リング６の半幅（２mm）に亘る突出片６Ｐを形成し、突出片６Ｐの下側（内側）には、固定リング５の勾配１のテーパー面ｔ´５に整合する、テーパー面ｔ´６を、外方へ縮径する円錐面形態で、テーパー面ｔ´６の面幅を２．８mmで形成し、突出片６Ｐの下面の水平面ｆ６と下側（内側）のテーパー面ｔ´６との間に、固定リング５の後側内面の断面三角状突出片５Ｐを整合嵌合するための、断面三角状の欠け込みＣ６を形成したものである。
そして、係止リング６に外圧が付加されれば、縮径するための小幅（標準：２．５mm）の切開されたスリット６Ｇを備えている。 Further, the front outer peripheral taper surface t6, the tip vertical side 60, and the horizontal surface f6 on the lower surface form a protruding piece 6P extending over the half width (2 mm) of the locking ring 6, and the lower side (inner side) of the protruding piece 6P. The tapered surface t′6, which is aligned with the tapered surface t′5 having the gradient 1 of the fixing ring 5, has a conical surface shape whose diameter is reduced outward, and the surface width of the tapered surface t′6 is 2.8 mm. Forming and fitting the cross-section triangular protruding piece 5P on the rear inner surface of the fixing ring 5 between the horizontal surface f6 on the lower surface of the protruding piece 6P and the lower (inner) tapered surface t′6, A notch C6 having a triangular cross section is formed.
When an external pressure is applied to the locking ring 6, a slit 6G having a small width (standard: 2.5 mm) for reducing the diameter is provided.

〔係止斜板（図８）〕
係止斜板７は、図１（Ｂ）に示す如く、係止リング６の前側の欠け込みＣ６内に弾性嵌着するものであり、図８は係止斜板７の説明図であって、（Ａ）は平面図、（Ｂ）は斜視図、（Ｃ）は（Ａ）のＣ−Ｃ線断面図である。
係止斜板７は、図７に示す如く、幅２．９mm、厚さが０．３mmのＣ字形状のステンレス鋼板片であって、自由状態では、内径ｄａが２２mm、外径ｄｂが２７．８mm、切開間隔７Ｇが２０mmで、高さｈ７が１mmの断面裁頭円錐形状であり、係止リング６の欠け込みＣ６に嵌合着座すれば、図１（Ｂ）に示す如く、幅２．８mmで勾配１（４５°）のテーパー面ｔ´６から先端縁ｅ７が勾配１で０．１mm斜向突出し、係止リング内面６ｄから、径方向内側に、先端縁ｅ７が０．０５mm突出するものである。 [Locking swash plate (Fig. 8)]
As shown in FIG. 1 (B), the locking swash plate 7 is elastically fitted into the notch C6 on the front side of the locking ring 6, and FIG. (A) is a top view, (B) is a perspective view, (C) is CC sectional view taken on the line of (A).
As shown in FIG. 7, the locking swash plate 7 is a C-shaped stainless steel plate having a width of 2.9 mm and a thickness of 0.3 mm. In the free state, the inner diameter da is 22 mm and the outer diameter db is 27. .8 mm, incision interval 7 G is 20 mm, height h 7 is 1 mm in cross-sectional truncated cone shape, and when fitted and seated in the notch C 6 of the locking ring 6, as shown in FIG. The tip edge e7 protrudes obliquely 0.1 mm from the tapered surface t′6 with a gradient 1 (45 °) at 8 mm, and the tip edge e7 protrudes 0.05 mm radially inward from the inner surface 6d of the locking ring. To do.

〔管継手の使用〕
管継手は、工場内で、図１（Ａ）の左半に示す如く、インナーコア９の、円筒外周面９ｃの外径Ｒ９´が１２．６mmの円筒部に配置した各係止溝９Ｇ（幅２．５mm、深さ１．４mm）に、黒色のＯリング４（太さ１．９mm、内径９．８mm）を嵌合し、次いで、ソケット用継手本体８内周面８ｄの中央部のねじ面８Ｓ´に、ソケット用のインナーコア９外周面中央部のねじ面９Ｓを螺合し、インナーコア９の円筒部外周面９ｃと継手本体円筒部内周面８ｄとの間に、パイプ１２を嵌入する隙間ｄｇを形成して締着する。
この場合、継手本体外周面８ｃの中央に配置した両側の平坦面８ｆを挟み込んで把持して、インナーコア９を螺合締着するので作業性が良い。 (Use of pipe fittings)
In the factory, as shown in the left half of FIG. 1 (A), the pipe joint is provided with each locking groove 9G (inside the inner core 9 in a cylindrical portion having an outer diameter R9 ′ of the cylindrical outer peripheral surface 9c of 12.6 mm). The black O-ring 4 (thickness 1.9 mm, inner diameter 9.8 mm) is fitted to the width 2.5 mm and depth 1.4 mm), and then the central portion of the inner peripheral surface 8 d of the socket joint body 8 is The threaded surface 9S is threadedly engaged with the threaded surface 9S at the center of the outer peripheral surface of the inner core 9 for the socket, and the pipe 12 is connected between the outer peripheral surface 9c of the inner core 9 and the inner peripheral surface 8d of the joint body cylindrical portion. The gap dg to be inserted is formed and tightened.
In this case, workability is good because the inner core 9 is screwed and fastened by sandwiching and holding the flat surfaces 8f on both sides arranged at the center of the joint body outer peripheral surface 8c.

次いで、係止リング６の断面三角状の欠け込みＣ６内に、係止斜板７を縮径して、基端縁ｂ７がテーパー面ｔ´６の最奥部に、先端縁ｅ７がテーパー面ｔ´６から斜向微突出（標準：０．１mm突出）形態に弾性嵌着し、キャップ３内へ、図１（Ａ）の左半に示す如く、係止リング６を、欠け込みＣ６側を前にして嵌め込み、係止リング６の前には固定リング５を、欠け込みＣ５を係止リング６の欠け込みＣ６と対向形態で嵌め込み、係止リング６の後部のテーパー面ｔｃ、及び固定リング５の後部のテーパー面ｔｂをキャップ３のテーパー面ｔ３に対向させ、固定リング前部のテーパー面ｔａを継手本体８のテーパー面ｔ８の内側に対向させて、嵌入内包し、キャップ３を継手本体８の端部に仮螺着する。   Next, the diameter of the locking swash plate 7 is reduced in the notch C6 having a triangular cross section of the locking ring 6, the base end edge b7 is at the innermost part of the tapered surface t'6, and the distal end edge e7 is the tapered surface. It is elastically fitted in the form of a slanted slight protrusion (standard: 0.1 mm protrusion) from t′6, and the locking ring 6 is inserted into the cap 3 as shown in the left half of FIG. The fixing ring 5 is fitted in front of the locking ring 6, and the notch C 5 is fitted in a form opposite to the notch C 6 of the locking ring 6, and the tapered surface tc at the rear part of the locking ring 6 is fixed. The taper surface tb at the rear of the ring 5 is opposed to the taper surface t3 of the cap 3, the taper surface ta at the front of the fixed ring is opposed to the inside of the taper surface t8 of the joint body 8, and the cap 3 is fitted. Temporarily screw onto the end of the body 8.

この場合、係止リング６と固定リング５は、キャップ３内で緩嵌合の自由状態であって、係止リング６の後部のテーパー面ｔｃ及び固定リング５の後部のテーパー面ｔｂがキャップ３のテーパー面ｔ３に当接支承された形態となるため、キャップ３後面の挿入用孔Ｈ３と、係止リング６の挿入用孔Ｈ６及び固定リング５の挿入用孔Ｈ５とは、同径、且つ前後整合形態となる。
そして、継手本体８にキャップ３を仮螺合した状態で、管継手として、施工現場に搬入する。 In this case, the locking ring 6 and the fixing ring 5 are loosely fitted in the cap 3, and the taper surface tc at the rear part of the locking ring 6 and the taper surface tb at the rear part of the fixing ring 5 are the cap 3. Therefore, the insertion hole H3 on the rear surface of the cap 3, the insertion hole H6 of the locking ring 6 and the insertion hole H5 of the fixing ring 5 have the same diameter, and It becomes a front-rear alignment form.
Then, in a state where the cap 3 is temporarily screwed into the joint body 8, the pipe body is carried into the construction site as a pipe joint.

施工現場では、管継手に対して、図１（Ａ）の左側図示の如く、プラスチック樹脂パイプ１２として、ＪＩＳ規格の呼び径１３Ａ（外径Ｒ１２：１７mm、内径Ｒ１２´：１３mm）のエチレン．オクテン．コポリマー（ＰＥ−ＲＴ）樹脂製半透明パイプ１２の先端を、キャップ３の後端（後面３Ｂ）の挿入用孔Ｈ３（孔径：１７．６mm）から、係止リング６（孔径：１７．６mm）及び固定リング５（孔径：１７．６mm）を貫通し、インナーコア９の外周に被覆形態で嵌合して、隙間ｄｇ内を段部ｄ９まで挿入する。
この場合、キャップ３、継手本体８、インナーコア９は透明であり、係止リング６、及び固定リング５は着色透明であるため、プラスチック樹脂パイプ１２が、Ｏリング４に変位を生じていない状態、パイプ先端が最奥部の段部ｄ９まで適正に嵌入した状態、及び、係止リング６と固定リング５が適正位置を占めている状態を目視確認して実施出来る。 At the construction site, as shown on the left side of FIG. 1 (A), as a plastic resin pipe 12, ethylene. With a nominal diameter 13A (outside diameter R12: 17 mm, inside diameter R12 ′: 13 mm) of JIS standard is used. Octene. From the insertion hole H3 (hole diameter: 17.6 mm) of the rear end (rear surface 3B) of the cap 3, the tip of the copolymer (PE-RT) resin translucent pipe 12 is engaged with the locking ring 6 (hole diameter: 17.6 mm). And the fixing ring 5 (hole diameter: 17.6 mm) is penetrated, it fits with the outer periphery of the inner core 9 with a covering form, and the inside of the clearance gap dg is inserted to the step part d9.
In this case, since the cap 3, the joint body 8, and the inner core 9 are transparent, and the locking ring 6 and the fixing ring 5 are colored and transparent, the plastic resin pipe 12 is not displaced in the O-ring 4. The state where the pipe tip is properly fitted to the innermost step d9 and the state where the locking ring 6 and the fixing ring 5 occupy the proper positions can be visually confirmed.

次いで、キャップ３を手で回転して、固く感じるまで継手本体８に螺合前進させる。
そして、キャップ３の、継手本体８に対する回転前進によって、キャップ３内に内包されている係止リング６は押圧前進して突出片６Ｐが固定リング５の欠け込みＣ５に嵌入して、係止リング６は固定リング５と係止斜板７を挟着した形態で一体化し、係止リング６も固定リング５も、共に、キャップ３の後部内側のテーパー面ｔ３で押されて前進し、プラスチック樹脂パイプ１２外周に緩嵌合であった係止リング６と固定リング５とは一体化部材として、前側の、緩傾斜且つ長寸のテーパー面ｔａが継手本体のテーパー面ｔ８の円錐面内への漸増する精緻な押圧嵌入作用を、後側の、急傾斜且つ短寸のテーパー面ｔｂプラスｔｃがキャップ３後部のテーパー面ｔ３の急増する被冠押圧作用を受け、前部と後部との押圧作用を受けて、固定リング５の前部から係止リング６の後部の全長に亘って縮径して、プラスチック樹脂パイプ１２の外周面１２ｃを圧接する。 Next, the cap 3 is rotated by hand, and is screwed forward to the joint body 8 until it feels firm.
When the cap 3 rotates forward with respect to the joint body 8, the locking ring 6 included in the cap 3 is pushed forward and the protruding piece 6 </ b> P is inserted into the notch C <b> 5 of the fixing ring 5, so that the locking ring is 6 is integrated with the fixing ring 5 and the locking swash plate 7 sandwiched, and both the locking ring 6 and the fixing ring 5 are pushed by the tapered surface t3 inside the rear portion of the cap 3 to advance, and are made of plastic resin. The locking ring 6 and the fixing ring 5 that have been loosely fitted to the outer periphery of the pipe 12 are integrated members, and the front side gently inclined and long taper surface ta is connected to the conical surface of the tapered surface t8 of the joint body. The gradual and precise press-fitting action is caused by the sharply inclined and short taper surface tb plus tc on the rear side being subjected to a crown pressing action in which the taper surface t3 of the rear part of the cap 3 is abruptly increased. Receive Decreases in diameter from the front of the grayed 5 over the rear portion of the entire length of the locking ring 6, is pressed against the outer peripheral surface 12c of the plastic resin pipe 12.

この場合、キャップ３を本締着した状態では、図１（Ａ）の右側及び図１（Ｃ）に示す如く、固定リング５は、前半部位がＯリング４の配置域外周面を押圧して、プラスチック樹脂パイプ１２の内周面１２ｄとインナーコア９の外周面９ｃとを完全に水密押圧し、後半部位がインナーコア９の先端域外周面９ｃへのプラスチック樹脂パイプ内周面１２ｄの水密押圧を達成し、同時に、係止リング６と固定リング５とで挟着されて前方に微寸（標準：０．１mm）斜向突出した係止斜板の先端縁ｅ７が、プラスチック樹脂パイプ外周面１２ｃに食い込んでパイプ１２の引き抜けを阻止し、固定リング５の内周面５ｄの周方向の２本の小条溝５Ｇ´と、係止リング６と固定リング５との割り溝形態の各スリット６Ｇ，５Ｇとが、可撓性プラスチック樹脂パイプ１２の外周面１２ｃへの食い込み作用を奏し、プラスチック樹脂パイプ１２の管継手からの引き抜け防止も達成する。
即ち、図１に示すソケット型管継手にあっては、両側からパイプ１２を挿入し、キャップ３を回転締付けるだけで、パイプ１２の接続がワンタッチで達成出来、水密押圧と引き抜け防止保持の保証出来るパイプ接続が達成出来る。 In this case, in the state in which the cap 3 is fully tightened, as shown in the right side of FIG. 1A and FIG. The inner peripheral surface 12d of the plastic resin pipe 12 and the outer peripheral surface 9c of the inner core 9 are completely watertight pressed, and the latter half of the plastic resin pipe 12 is pressed against the outer peripheral surface 9c of the inner end of the inner core 9 by watertight pressing. At the same time, the front edge e7 of the locking swash plate sandwiched between the locking ring 6 and the fixing ring 5 and projecting obliquely forward (standard: 0.1 mm) obliquely is the outer peripheral surface of the plastic resin pipe. Each of the grooved forms of the two small grooves 5G ′ in the circumferential direction of the inner peripheral surface 5d of the fixing ring 5 and the locking ring 6 and the fixing ring 5 is prevented from being pulled into the pipe 12c. Slits 6G and 5G are flexible plastic trees It has an effect of biting into the outer peripheral surface 12c of the fat pipe 12, and also prevents the plastic resin pipe 12 from being pulled out from the pipe joint.
That is, in the socket type pipe joint shown in FIG. 1, the pipe 12 can be connected by one-touch by simply inserting the pipe 12 from both sides and rotationally tightening the cap 3, guaranteeing watertight pressing and pull-out prevention retention. A possible pipe connection can be achieved.

〔変形例（図１０）〕
図１０は、本発明の管継手をエルボ形態として水栓等の接続に適用可能とした説明図であって、図１０（Ａ）は縦断側面図、図１０（Ｂ）は側面図である。
この場合、図１０（Ａ）に示す如く、継手本体８の他端は屈曲したエルボ管１０とし、インナーコア９、継手本体８、キャップ３は、継手本体８の一端側にのみ配置する形態、即ち、図１のソケット型管継手１の一端側対応構成とし、他端のエルボ管１０の先端内周には接続用ねじ面１０Ｓを、螺着する金具に応じて配置したものである。
従って、配管施工時に、所定位置に管継手２を固定して、一端の継手本体８に、プラスチック樹脂パイプ１２をワンタッチ操作で接続し、他端には、図示しない水栓、或いは給水側のソケット金具等を螺合固定することが出来る。 [Modification (FIG. 10)]
10A and 10B are explanatory views in which the pipe joint of the present invention can be applied to connection of a faucet or the like in the form of an elbow. FIG. 10A is a longitudinal side view, and FIG. 10B is a side view.
In this case, as shown in FIG. 10 (A), the other end of the joint body 8 is a bent elbow pipe 10, and the inner core 9, the joint body 8, and the cap 3 are arranged only on one end side of the joint body 8. That is, the socket type pipe joint 1 shown in FIG. 1 is configured to correspond to one end side, and the connecting thread surface 10S is arranged on the inner periphery of the tip of the elbow pipe 10 at the other end according to the fitting to be screwed.
Therefore, the pipe joint 2 is fixed at a predetermined position at the time of piping construction, the plastic resin pipe 12 is connected to the joint body 8 at one end by a one-touch operation, and a water tap or a water supply side socket not shown is connected to the other end. Metal fittings can be screwed and fixed.

本発明のソケット型管継手の説明図であって、（Ａ）は縦断側面図、（Ｂ）は（Ａ）のＢ部拡大図、（Ｃ）は（Ａ）のＣ部拡大図である。It is explanatory drawing of the socket type pipe joint of this invention, Comprising: (A) is a vertical side view, (B) is the B section enlarged view of (A), (C) is the C section enlarged view of (A). 継手本体８の説明図であって、（Ａ）は縦断側面図、（Ｂ）は端面図、（Ｃ）は側面図である。It is explanatory drawing of the coupling main body 8, Comprising: (A) is a vertical side view, (B) is an end view, (C) is a side view. キャップ３の説明図であって、（Ａ）は後面図、（Ｂ）は縦断側面図である。It is explanatory drawing of the cap 3, Comprising: (A) is a rear view, (B) is a vertical side view. インナーコア９の説明図であって、（Ａ）は縦断側面図、（Ｂ）は側面図である。It is explanatory drawing of the inner core 9, Comprising: (A) is a vertical side view, (B) is a side view. Ｏリング４の説明図であって、（Ａ）は正面図、（Ｂ）は縦断側面図である。It is explanatory drawing of the O-ring 4, Comprising: (A) is a front view, (B) is a vertical side view. 固定リング５の説明図であって、（Ａ）は側面図、（Ｂ）は前面図、（Ｃ）は縦断面図である。It is explanatory drawing of the fixing ring 5, Comprising: (A) is a side view, (B) is a front view, (C) is a longitudinal cross-sectional view. 係止リング６の説明図であって、（Ａ）は側面図、（Ｂ）は後面図、（Ｃ）は縦断面図である。It is explanatory drawing of the locking ring 6, Comprising: (A) is a side view, (B) is a rear view, (C) is a longitudinal cross-sectional view. 係止斜板７の説明図であって、（Ａ）は平面図、（Ｂ）は斜視図、（Ｃ）は（Ａ）のＣ−Ｃ線断面図である。It is explanatory drawing of the latching swash plate 7, Comprising: (A) is a top view, (B) is a perspective view, (C) is CC sectional view taken on the line of (A). （Ａ）は図６（Ｃ）の部分拡大図、（Ｂ）は図７（Ｃ）の部分拡大図である。(A) is the elements on larger scale of FIG.6 (C), (B) is the elements on larger scale of FIG.7 (C). 本発明をエルボ型管継手に適用した説明図であって、（Ａ）は縦断側面図、（Ｂ）は側面図である。It is explanatory drawing which applied this invention to the elbow type pipe joint, Comprising: (A) is a vertical side view, (B) is a side view. 従来例１の説明図であって、（Ａ）は接続前の状態の縦断側面図、（Ｂ）は接続状態の縦断側面図である。It is explanatory drawing of the prior art example 1, Comprising: (A) is a vertical side view of the state before a connection, (B) is a vertical side view of a connection state. 従来例２の説明図であって、（Ａ）は接続状態の縦断側面図、（Ｂ）は（Ａ）の部分拡大図である。It is explanatory drawing of the prior art example 2, Comprising: (A) is a vertical side view of a connection state, (B) is the elements on larger scale of (A).

符号の説明Explanation of symbols

１ ソケット型管継手（管継手）
２ エルボ型管継手（管継手）
３ キャップ
３Ｂ，５Ｂ，６Ｂ 後面
３ｃ，５ｃ，６ｃ，８ｃ，９ｃ，１２ｃ 外周面
３ｄ，５ｄ，６ｄ，８ｄ，９ｄ，１２ｄ 内周面
３Ｆ，５Ｆ，６Ｆ 前面
３Ｐ 突起
３Ｓ，８Ｓ，８Ｓ´，９Ｓ，１０Ｓ ねじ面
４ Ｏリング
５ 固定リング
５Ｇ，６Ｇ スリット
５Ｇ´ 条溝
５Ｐ，６Ｐ 突出片
６ 係止リング
７ 係止斜板
８ 継手本体
８ｆ 平坦面
９ インナーコア
９Ｇ 係止溝
１０ エルボ管
１２ プラスチック樹脂パイプ（パイプ）
５０，６０ 垂直辺
ｂ７ 基端縁
Ｃ５，Ｃ６ 欠け込み
ｅ７ 先端縁
ｆ５，ｆ６ 水平面
ｄｇ 隙間
ｄ９ 段部
Ｈ３，Ｈ５，Ｈ６，Ｈ８ 挿入用孔
Ｈ８´ ，Ｈ３” 嵌合孔
Ｈ９ 通水孔
ｔ３，ｔ５，ｔ´５，ｔ６，ｔ´６，ｔ８，ｔ９，ｔａ，ｔｂ，ｔｃ テーパー面
ｓｔ ストッパー面 1 Socket type pipe fittings (pipe fittings)
2 Elbow type pipe fitting (pipe fitting)
3 Cap 3B, 5B, 6B Rear surface 3c, 5c, 6c, 8c, 9c, 12c Outer peripheral surface 3d, 5d, 6d, 8d, 9d, 12d Inner peripheral surface 3F, 5F, 6F Front surface 3P Protrusion 3S, 8S, 8S ', 9S, 10S Thread surface 4 O-ring 5 Fixing ring 5G, 6G Slit 5G 'Groove 5P, 6P Protruding piece 6 Locking ring 7 Locking swash plate 8 Joint body 8f Flat surface 9 Inner core 9G Locking groove 10 Elbow tube 12 Plastic resin pipe (pipe)
50, 60 Vertical side b7 Base edge C5, C6 Notch e7 Tip edge f5, f6 Horizontal plane dg Clearance d9 Step H3, H5, H6, H8 Insertion hole H8 ', H3 "Fitting hole H9 Water passage hole t3 t5, t'5, t6, t'6, t8, t9, ta, tb, tc Tapered surface st Stopper surface

Claims (9)

管状のインナーコア（９）の外周に継手本体（８）を装着し、継手本体（８）の端部にキャップ（３）を冠着し、可撓性のプラスチック樹脂パイプ（１２）をキャップ（３）を介してインナーコア（９）上に被覆挿入し、キャップ（３）の回動によってワンタッチでプラスチック樹脂パイプ（１２）を接続する管継手であって、インナーコア（９）は、通水孔（Ｈ９）を備えたパイプ形態であって、外周面（９ｃ）には、継手本体（８）を螺着するねじ面（９Ｓ）と、係止溝（９Ｇ）に嵌合したＯリング（４）とを備え、継手本体（８）は、パイプ形態であって、内周面（８ｄ）には、インナーコア（９）螺着用のねじ面（８Ｓ´）を、外周面（８ｃ）にはキャップ（３）螺着用のねじ面（８Ｓ）を備えると共に、内周面端部には外方に拡径するテーパー面（ｔ８）を備え、キャップ（３）は、後面（３Ｂ）に挿入用孔（Ｈ３）を備え、内周面前部には継手本体のねじ面（８Ｓ）と螺合するねじ面（３Ｓ）を、内周面後部には外方に縮径するテーパー面（ｔ３）を備え、キャップ（３）内には、前部に継手本体（８）のテーパー面（ｔ８）と整合するテーパー面（ｔａ）を、後部にキャップ（３）のテーパー面（ｔ３）と整合するテーパー面（ｔｂ）とを外周に有し、後面（５Ｂ）に嵌合用突出片（５Ｐ）を有し、縮径用のスリット（５Ｇ）を備えた固定リング（５）と、後部にキャップ（３）のテーパー面（ｔ３）と整合するテーパー面（ｔｃ）を、前面（６Ｆ）に、係止斜板（７）を内周面（６ｄ）から突出形態で嵌着する嵌合用欠け込み（Ｃ６）を有し、縮径用のスリット（６Ｇ）を備えた係止リング（６）、とを嵌合内包し、プラスチック樹脂パイプ（１２）を、キャップ（３）の挿入用孔（Ｈ３）からインナーコア（９）と継手本体（８）との隙間（ｄｇ）に挿入し、キャップ（３）の螺合締着によって、固定リング（５）と係止リング（６）が係止斜板（７）を挟着一体化して縮径し、プラスチック樹脂パイプ（１２）をインナーコア（９）外周面（９ｃ）に水密押圧して係止する、プラスチック樹脂パイプ用の管継手。   The joint body (8) is mounted on the outer periphery of the tubular inner core (9), the cap (3) is attached to the end of the joint body (8), and the flexible plastic resin pipe (12) is attached to the cap ( 3) a pipe joint that is covered and inserted onto the inner core (9) through the cap (3) and connects the plastic resin pipe (12) with one touch by turning the cap (3). The inner core (9) It is a pipe form provided with the hole (H9), Comprising: On the outer peripheral surface (9c), there is a thread surface (9S) to which the joint main body (8) is screwed, and an O-ring fitted to the locking groove (9G) ( 4), the joint body (8) is in the form of a pipe, and the inner peripheral surface (8d) is provided with a thread surface (8S ') for screwing the inner core (9) on the outer peripheral surface (8c). Has a threaded surface (8S) for screwing the cap (3), and the diameter of the inner circumferential surface is increased outward. The cap (3) has an insertion hole (H3) on the rear surface (3B), and a screw surface (8S) screwed with the screw surface (8S) of the joint body on the front surface of the inner peripheral surface. 3S) is provided with a taper surface (t3) that is reduced in diameter outwardly at the rear part of the inner peripheral surface, and a taper that matches the taper surface (t8) of the joint body (8) at the front part in the cap (3). The surface (ta) has a taper surface (tb) aligned with the taper surface (t3) of the cap (3) at the rear, and has a fitting protrusion (5P) on the rear surface (5B). A fixing ring (5) having a slit for diameter (5G), a tapered surface (tc) aligned with the tapered surface (t3) of the cap (3) at the rear, and a locking swash plate (6F) on the front surface (6F) 7) having a notch for fitting (C6) for fitting in a projecting form from the inner peripheral surface (6d), and a slit for diameter reduction (6 G) and a locking ring (6) provided with a plastic resin pipe (12) from the insertion hole (H3) of the cap (3) to the inner core (9) and the joint body (8). The fixing ring (5) and the locking ring (6) are integrated with the locking swash plate (7) and are reduced in diameter by screwing and tightening the cap (3). A pipe joint for a plastic resin pipe, in which the plastic resin pipe (12) is watertightly pressed and locked to the outer peripheral surface (9c) of the inner core (9). インナーコア（９）が複数本のＯリング（４）を備え、キャップ（３）の螺合締着時に、固定リング（５）の前部のテーパー面（ｔａ）と継手本体テーパー面（ｔ８）との協仂作用によって、固定リング（５）がプラスチック樹脂パイプ（１２）をＯリング（４）に押圧する、請求項１に記載の管継手。   The inner core (9) includes a plurality of O-rings (4), and when the cap (3) is screwed and fastened, the front tapered surface (ta) of the fixing ring (5) and the joint body tapered surface (t8) The pipe joint according to claim 1, wherein the fixing ring (5) presses the plastic resin pipe (12) against the O-ring (4) by a cooperative action. インナーコア（９）、継手本体（８）及びキャップ（３）は透視可能プラスチック樹脂製である、請求項１又は２に記載の管継手。   The pipe joint according to claim 1 or 2, wherein the inner core (9), the joint body (8) and the cap (3) are made of a transparent plastic resin. 固定リング（５）は、軸方向幅（Ｗ５）が、Ｏリング（４）域を覆う寸法を備え、且つ、内周面（５ｄ）には複数本の周方向条溝（５Ｇ´）を備えている、請求項１乃至３のいずれか１項に記載の管継手。   The fixing ring (5) has a dimension in which the axial width (W5) covers the O-ring (4) region, and the inner peripheral surface (5d) has a plurality of circumferential grooves (5G '). The pipe joint according to any one of claims 1 to 3. 固定リング（５）は、前部外周に継手本体（８）のテーパー面（ｔ８）と整合する緩傾斜のテーパー面（ｔａ）を、後部外周にキャップ（３）のテーパー面（ｔ３）と整合する急傾斜のテーパー面（ｔｂ）を備え、後面（５Ｂ）には、係止リング（６）嵌合用の、突出片（５Ｐ）と欠け込み（Ｃ５）とを備え、且つ、キャップ（３）の挿入用孔（Ｈ３）と同径の挿入用孔（Ｈ５）を備えている、請求項１乃至４のいずれか１項に記載の管継手。   The fixing ring (5) has a gently inclined tapered surface (ta) aligned with the tapered surface (t8) of the joint body (8) on the front outer periphery and aligned with the tapered surface (t3) of the cap (3) on the rear outer periphery. The rear surface (5B) is provided with a protruding piece (5P) and a notch (C5) for fitting the locking ring (6), and a cap (3). The pipe joint according to any one of claims 1 to 4, comprising an insertion hole (H5) having the same diameter as the insertion hole (H3). 係止リング（６）は、後部外周にキャップ（３）のテーパー面（ｔ３）と整合する急傾斜のテーパー面（ｔｃ）を、前部外周に、固定リング（５）の欠け込み（Ｃ５）に嵌入する突出片（６Ｐ）を欠け込み（Ｃ６）によって形成し、欠け込み（Ｃ６）には、係止斜板（７）を弾性反撥力によって嵌着可能とした、請求項１乃至４のいずれか１項に記載の管継手。   The locking ring (6) has a steeply tapered surface (tc) aligned with the tapered surface (t3) of the cap (3) on the outer periphery of the rear portion, and a notch (C5) of the fixing ring (5) on the outer periphery of the front portion. The projecting piece (6P) to be fitted into the slit is formed by a notch (C6), and the locking swash plate (7) can be fitted to the notch (C6) by elastic repulsion. The pipe joint according to any one of claims. 固定リング（５）は、後面（５Ｂ）部で、外周のテーパー面（ｔｂ）と内周のテーパー面（ｔ´５）との間に、上面のテーパー面（ｔ５）と、下面の水平面（ｆ５）と、内端の垂直辺（５０）とを備えた欠け込み（Ｃ５）を形成すると共に、欠け込み（Ｃ５）の下部を突出片（５Ｐ）とし、係止リング（６）は、前面（６Ｆ）部で、固定リング（５）の欠け込み（Ｃ５）に嵌合するための突出片（６Ｐ）を、上面のテーパー面（ｔ６）と、前端の垂直辺（６０）と、下面の水平面（ｆ６）とで形成すると共に、突出片（６Ｐ）の下方には、固定リング（５）のテーパー面（ｔ´５）に整合するテーパー面（ｔ´６）によって欠け込み（Ｃ６）を形成し、係止斜板（７）を係止リング（６）の欠け込み（Ｃ６）のテーパー面（ｔ´６）上に嵌着して、係止斜板（７）をテーパー面（ｔ´６）とテーパー面（ｔ´５）で押圧挟着する、請求項１乃至６のいずれか１項に記載の管継手。   The fixing ring (5) is a rear surface (5B) portion between the outer taper surface (tb) and the inner taper surface (t′5), the upper taper surface (t5) and the lower horizontal surface ( f5) and a notch (C5) having a vertical side (50) at the inner end, and a lower part of the notch (C5) is a protruding piece (5P), and the locking ring (6) At the (6F) portion, the projecting piece (6P) for fitting into the notch (C5) of the fixing ring (5) includes the upper tapered surface (t6), the front vertical edge (60), and the lower surface A notch (C6) is formed by a tapered surface (t′6) aligned with the tapered surface (t′5) of the fixing ring (5) below the protruding piece (6P). Form and fit the locking swash plate (7) on the notch (C6) taper surface (t'6) of the locking ring (6) Presses pinched by Kakaritomehasuban (7) tapered surface (t'6) and tapered surface (t'5), pipe joint according to any one of claims 1 to 6. インナーコア（９）及び継手本体（８）が長手方向に左右対称構造のソケット形態であって、両側からキャップ（３）を嵌合して、両側からプラスチック樹脂パイプ（１２）を挿入接続する、請求項１乃至７のいずれか１項に記載の管継手。   The inner core (9) and the joint body (8) are in the form of a symmetrical socket in the longitudinal direction, and the cap (3) is fitted from both sides, and the plastic resin pipe (12) is inserted and connected from both sides. The pipe joint according to any one of claims 1 to 7. 継手本体（８）がエルボ形態であって、一端の管継手に、プラスチック樹脂パイプ（１２）を接続締着可能とし、エルボ管（１０）の他端内面には接続用ねじ面（１０Ｓ）を備えた、請求項１乃至７のいずれか１項に記載の管継手。   The joint body (8) is in an elbow form, and a plastic resin pipe (12) can be connected and fastened to a pipe joint at one end, and a connecting thread surface (10S) is provided on the other end inner surface of the elbow pipe (10). The pipe joint according to any one of claims 1 to 7, which is provided.
JP2008212848A 2008-08-21 2008-08-21 Pipe fittings for plastic resin pipes Expired - Fee Related JP4766707B2 (en)

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JP2008212848A JP4766707B2 (en) 2008-08-21 2008-08-21 Pipe fittings for plastic resin pipes
KR1020117001684A KR101267647B1 (en) 2008-08-21 2009-08-18 Pipe joint for a plastic resin pipe
CN2009801287561A CN102105731B (en) 2008-08-21 2009-08-18 Pipe joint for a plastic resin pipe
PCT/JP2009/064449 WO2010021323A1 (en) 2008-08-21 2009-08-18 Pipe joint for a plastic resin pipe

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DE102017128470A1 (en) 2017-11-30 2019-06-06 GEBO Armaturen GmbH Connection system for the repair of plastic composite pipe systems
CN108087646B (en) * 2017-12-21 2023-12-22 海南联塑科技实业有限公司 Spiral rib lining transition piece of carat pipe
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