JP5800975B1 - Pipe fitting - Google Patents

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JP5800975B1
JP5800975B1 JP2014204479A JP2014204479A JP5800975B1 JP 5800975 B1 JP5800975 B1 JP 5800975B1 JP 2014204479 A JP2014204479 A JP 2014204479A JP 2014204479 A JP2014204479 A JP 2014204479A JP 5800975 B1 JP5800975 B1 JP 5800975B1
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pipe
ring body
pipe joint
petal
petal piece
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JP2016075308A (en
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清和 高橋
清和 高橋
克行 増井
克行 増井
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Inoue Sudare Co Ltd
Higashio Mech Co Ltd
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Inoue Sudare Co Ltd
Higashio Mech Co Ltd
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  • Joints That Cut Off Fluids, And Hose Joints (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

【課題】簡素な内部構造でありながら、パイプとの接続作業を完了したか否かを、確実に、作業者に知らせ、パイプ挿入不十分や挿入忘れに伴う流体の外部漏洩事故を防ぐ。【解決手段】パイプ引抜阻止部材１を備えた管継手に於て；外周に、内方縮径テーパ面３３Ａと、テーパ面の外方端の外径寸法よりも小さな外径寸法の被敲き面３３Ｃとを有し、挿入されてくるパイプの先端面２８に当接して押圧され、奥方へ移動するリング体３３と；内方端３０Ａから軸心方向に複数本のスリットを有する弾性変形自在な花弁片３３Ｃを有し、管継手内部に保持される筒状内装体３０とを備え、パイプの挿入に伴って、リング体が奥方へ移動して、テーパ面が花弁片の内方端を拡開させるように弾性変形させ、花弁片の弾性変形に伴うラジアル内方向への弾発付勢力によって、リング体の被敲き面を、花弁片の内方端が敲き、接続完了報知音を発生するようにした。【選択図】図６The present invention reliably notifies the operator of whether or not the connection work with the pipe has been completed even though it has a simple internal structure, and prevents an accidental external leakage of fluid due to insufficient pipe insertion or forgetting to insert. In a pipe joint provided with a pipe pull-out prevention member 1; an outer diameter taper surface 33A on the outer periphery and an outer diameter smaller than the outer diameter of the outer end of the taper surface. A ring body 33 that has a surface 33C, is pressed against the tip end surface 28 of the inserted pipe, and moves to the back; elastically deformable having a plurality of slits in the axial direction from the inner end 30A A cylindrical interior body 30 that is held inside the pipe joint, and the ring body moves to the back as the pipe is inserted, and the taper surface extends to the inner end of the petal piece. It is elastically deformed so that it expands, and the inner end of the petal piece whirls the surface of the ring body by the radial biasing force in the radial direction accompanying the elastic deformation of the petal piece. To occur. [Selection] Figure 6

Description

本発明は、管継手に関する。   The present invention relates to a pipe joint.

図14に示した管継手を、本出願人は、過去に提案している（特許文献１参照）。
即ち、被接続用パイプ41の端部に挿入される挿入筒部43を有する継手本体42と、この挿入筒部43に外嵌されたパイプ41の端部を、（図14（Ａ）から（Ｂ）のように）弾発的な締付力で締付けるためのスリット51付の締付環体45と、この締付環体45の弾発力に抗して締付環体45を拡径するようにスリット51に挟持される拡径片46を、具備しており、矢印Ａのように挿入されてくるパイプ41の先端部に当接して、その拡径片46は、離脱する。この離脱によって、図14（Ｂ）に示すように、締付環体45はその弾発力にて強くパイプ41をラジアル内方向に締付けて、挿入筒部43とパイプ41を強力に一体化させ、パイプ引抜阻止機能を発揮する構成である。 The present applicant has proposed the pipe joint shown in FIG. 14 in the past (see Patent Document 1).
That is, the joint main body 42 having the insertion cylinder portion 43 inserted into the end portion of the pipe 41 to be connected, and the end portion of the pipe 41 externally fitted to the insertion cylinder portion 43 (from FIG. 14A ( B)) A tightening ring 45 with a slit 51 for tightening with a resilient tightening force, and the diameter of the tightening ring 45 is increased against the resilient force of the tightening ring 45 Thus, the diameter-enlarging piece 46 sandwiched between the slits 51 is provided, and the diameter-enlarging piece 46 is released by coming into contact with the distal end portion of the pipe 41 inserted as shown by an arrow A. By this separation, as shown in FIG. 14B, the tightening ring 45 strongly tightens the pipe 41 in the radial inward direction by its elastic force, and the insertion tube portion 43 and the pipe 41 are strongly integrated. This is a configuration that exerts a function of preventing the withdrawal of the pipe.

拡径片46が離脱する際のカチッという音がするので、パイプ41を正規深さまで挿入したことを作業者は確認可能である。但し、金属製の小さな拡径片46は外部から目視確認することは至難であった。特に、外包囲体47が透明であったとしても、金属製の小さな拡径片46は、内部空間48のどこに存在するか判りづらく、特に、小さくても比重の大きい拡径片46は外包囲体47の（内面の）下方位置に移動して見付けることが困難であり、パイプの接続作業が確実に完了したか否か、判り難いところも少々あった。   Since a clicking sound is generated when the diameter-expanding piece 46 is detached, the operator can confirm that the pipe 41 has been inserted to the normal depth. However, it is very difficult to visually check the small diameter-expanded piece 46 made of metal from the outside. In particular, even if the outer enclosure 47 is transparent, it is difficult to determine where the small metal-made enlarged diameter piece 46 exists in the internal space 48. It was difficult to find it by moving to a lower position (inside the body) of the body 47, and it was difficult to understand whether or not the pipe connection work was completed.

特許第３４０５９６６号公報Japanese Patent No. 3405966

上述の特許文献１の管継手は、耐引抜力が極めて大きく、かつ、安定しているため市場で信頼を受けている製品である。しかしながら、構造がやや複雑で、弾発力の強い締付環体45と拡径片46との組付が危険で作業能率が低いという問題もあり、用途によっては、もっと簡素な構造で、製造し易い安価な管継手でも十分であるとの声も市場で聞こえることがある。
そこで、新しいそのような管継手を開発してゆく際、内部機構によっては、パイプ先端が十分に管継手内方へ挿入されたか否か作業者に判りづらい（全く音が発生しない）場合が多いことに本発明者は気付いた。特に、最近は作業者の熟練度及び能力に関しては極めてバラツキの多い状況となりつつあり、パイプを正規深さまで挿入しないで、接続完了したと判断してしまって、その後の流体洩れが発生する虞が高まりつつある。 The pipe joint of the above-mentioned patent document 1 is a product that is highly trusted in the market because of its extremely high pull-out resistance and stability. However, the structure is somewhat complicated, and there is also a problem that the assembly of the tightening ring 45 and the enlarged diameter piece 46, which has a strong elasticity, is dangerous and the work efficiency is low. There are also voices in the market saying that cheap fittings that are easy to do are sufficient.
Therefore, when developing such a new pipe joint, depending on the internal mechanism, it is often difficult for the operator to know whether or not the pipe tip is sufficiently inserted into the pipe joint (no sound is generated). In particular, the inventor has noticed. In particular, the level of skill and ability of workers has recently become extremely variable, and it may be judged that the connection has been completed without inserting the pipe to the normal depth, and subsequent fluid leakage may occur. It is growing.

そこで、本発明は、簡素な内部構造でありながら、パイプとの接続作業を完了したか否かを、確実に、作業者に知らせることを可能とし、パイプ挿入不十分や挿入忘れに伴う流体の外部漏洩事故を防ぐことを目的とする。   Therefore, the present invention makes it possible to reliably notify the operator whether or not the connection work with the pipe has been completed even though it has a simple internal structure. The purpose is to prevent external leakage accidents.

本発明は、パイプ引抜阻止部材を備えた管継手に於て；外周に、内方縮径テーパ面と、該テーパ面の外方端の外径寸法よりも小さな外径寸法の被敲き面とを有し、挿入されてくるパイプの先端面に当接状として押圧され、奥方へ移動するリング体と；内方端から軸心方向に複数本のスリットを形成することによって構成される弾性変形自在な花弁片を複数枚有し、管継手内部に保持される筒状内装体と、を備え；パイプＰの挿入に伴って、上記リング体が奥方へ移動して、上記テーパ面が上記筒状内装体の上記花弁片の内方端を拡開させるように弾性変形させ、上記花弁片の該弾性変形に伴うラジアル内方向への弾発付勢力によって、上記リング体の上記被敲き面を、上記花弁片の内方端が敲き、接続完了報知音を発生するように構成した管継手である。   The present invention relates to a pipe joint provided with a pipe drawing prevention member; on the outer periphery thereof, an inner diameter-reduced tapered surface, and a coated surface having an outer diameter smaller than the outer diameter of the outer end of the tapered surface A ring body that is pressed in contact with the distal end surface of the pipe that is inserted and moves to the back; and an elasticity that is formed by forming a plurality of slits in the axial direction from the inner end A cylindrical interior body having a plurality of deformable petal pieces and held inside the pipe joint; as the pipe P is inserted, the ring body moves to the back, and the tapered surface is The ring-shaped inner body is elastically deformed so as to expand the inner end of the petal piece, and the ring body is covered by the elastic biasing force in the radial inward direction accompanying the elastic deformation of the petal piece. The pipe is configured such that the inner end of the petal piece is rolled and a connection completion notification sound is generated. Hand is.

また、上記リング体は、内周奥方側角部を面取りしたテーパ面を有し、パイプの挿入の際に、パイプの先端面のエッジによってシール材が傷付くことを防止するためシール材を押え込んで案内するパイプ誘導機能を備えている。
また、パイプ未挿入状態下では、上記筒状内装体の上記花弁片は、弾性変形を生ずる外力を受けない、自由状態を保っている。
また、上記リング体が上記花弁片によって敲かれて上記接続完了報知音を発生する奥方位置に於て、上記リング体を包囲している筒状部材を透明とすると共に、上記リング体は、全体又は外周面が注意喚起用有彩色を有し、上記奥方位置に於て、外部から上記注意喚起用有彩色を目視可能に構成されている。 The ring body has a tapered surface with chamfered corners on the inner peripheral back side, and when the pipe is inserted, the seal material is pressed to prevent the seal material from being damaged by the edge of the end surface of the pipe. It is equipped with a pipe guiding function that guides and guides.
In addition, when the pipe is not inserted, the petal piece of the cylindrical interior body is free from external force that causes elastic deformation.
In addition, the tubular member surrounding the ring body is transparent at the back position where the ring body is hit by the petal piece and generates the connection completion notification sound. or the outer peripheral surface has a chromatic for alerting, at a the deeper position, that is visibly constituting the chromatic for the alert from the outside.

本発明によれば、構成部品が簡単なもので十分であり、部品の組立ても容易である。リング体は、奥方へ軽くスムーズに移動して、管継手内部から、衝撃音（及び振動）を発生し、接続作業者に、確実に、パイプを正規深さまで挿入したこと（パイプ接続完了又は施工完了とも呼ぶ）を、知らしめることができる。これによって、その後の流体外部漏洩を防ぐことができる。 According to the present invention, simple components are sufficient, and the components can be easily assembled. The ring body is moved lightly and smoothly to the back, and an impact sound (and vibration) is generated from the inside of the pipe joint. The pipe operator is surely inserted to the normal depth (pipe connection complete or construction) (Also called completion). Thereby, subsequent fluid external leakage can be prevented.

本発明の実施の一形態を示し、パイプ未挿入状態を示す断面図である。It is sectional drawing which shows one Embodiment of this invention and shows a pipe uninserted state. 本発明の実施の一形態であって、パイプ接続完了状態を示す断面図である。It is one Embodiment of this invention, Comprising: It is sectional drawing which shows a pipe connection completion state. 主要構成部品の正面図である。It is a front view of main components. 図３のＥ−Ｅ断面端面図である。It is an EE cross-section end view of FIG. 作用（作動）説明図である。It is an action (operation) explanatory view. 作用（作動）説明図である。It is an action (operation) explanatory view. 参考例を示す断面図である。It is sectional drawing which shows a reference example . 参考例の作用（作動）説明図である。 It is an effect | action (operation | movement) explanatory drawing of a reference example . 参考例を示す断面図である。It is sectional drawing which shows a reference example . 参考例の作用（作動）説明図である。 It is an effect | action (operation | movement) explanatory drawing of a reference example . 参考例の作用（作動）説明図である。 It is an effect | action (operation | movement) explanatory drawing of a reference example . 参考例の弾性Ｃリングの横断面説明図である。It is a cross-sectional explanatory drawing of the elastic C ring of a reference example . パイプ引抜阻止部材の一例を示す図である。It is a figure which shows an example of a pipe drawing-out prevention member. 従来例を示す断面図である。It is sectional drawing which shows a prior art example.

以下、図示の実施の形態に基づき本発明を詳説する。
図１，図２に本発明の実施の一形態を示す。本発明に係る管継手とパイプＰは、給水，給湯，その他各種の流体に用いられる。２は、継手本体であって、パイプＰの端部に挿入される挿入筒部３を有している。また、挿入筒部３には、（図例では）２個のシール溝が凹設されて、２個のシール材（Ｏリング）４，５が嵌着されている。この管継手は、簡素なパイプ引抜阻止部材１を備えている。
上記継手本体２は、図１では、雄ネジ６と、作業工具を掛けるための六角部７と、中径筒部８と、小さな外鍔部９とを一体に有し、この外鍔部９の一端面を段付面10として、上記挿入筒部３が突出状に連設されている。 Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
1 and 2 show an embodiment of the present invention. The pipe joint and pipe P according to the present invention are used for water supply, hot water supply, and other various fluids. Reference numeral 2 denotes a joint body having an insertion cylinder portion 3 to be inserted into an end portion of the pipe P. In addition, two seal grooves (in the illustrated example) are recessed in the insertion tube portion 3, and two seal materials (O-rings) 4 and 5 are fitted therein. This pipe joint includes a simple pipe pull-out preventing member 1.
In FIG. 1, the joint body 2 integrally includes a male screw 6, a hexagonal portion 7 for hanging a work tool, a medium diameter cylindrical portion 8, and a small outer flange portion 9. The insertion cylinder part 3 is continuously provided in a protruding shape with one end face thereof as a stepped surface 10.

11は透明筒状部材であって、継手本体２の中径筒部８に密嵌状に取着され、外鍔部９にて、係止状に抜止めされている。この透明筒状部材11は、先端側（図１の右方向側端部）に雄ネジ部12を有し、袋ナット13が螺着される。
また、透明筒状部材11は、上記雄ネジ部12は軸心方向先端側に設けられ、軸心方向基端側は嵌着部14を有しており、この嵌着部14が中径筒部８に取着される。
そして、この透明筒状部材11の内部の孔部の先端開口部から、大径の嵌着用孔部16と（奥方へ縮径状の）テーパ面29とを形成し、この嵌着用孔部16に不透明な包状内装体30を嵌着する。 Reference numeral 11 denotes a transparent cylindrical member, which is attached to the middle-diameter cylindrical portion 8 of the joint body 2 in a close fitting manner, and is secured to the outer flange portion 9 in a locking manner. The transparent cylindrical member 11 has a male threaded portion 12 on the distal end side (right end portion in FIG. 1 ), and a cap nut 13 is screwed thereon.
Further, in the transparent cylindrical member 11, the male screw portion 12 is provided on the distal end side in the axial center direction, and the proximal end side in the axial center direction has a fitting portion 14, and the fitting portion 14 is a medium diameter cylinder. Part 8 is attached.
Then, a large-diameter fitting hole 16 and a tapered surface 29 (having a reduced diameter toward the back) are formed from the tip opening of the hole inside the transparent cylindrical member 11, and this fitting hole 16 A non-transparent packaged inner body 30 is fitted into the inner wall.

また、透明筒状部材11は、中径筒部８に嵌着される取付孔部18を有している。
パイプ引抜阻止部材１について以下説明すると、図１，図２，図５，図６、及び、図13に例示するように、金属薄板材から成り、円環状平板体であって内周縁から放射状に多数のスリット19を形成して、多数の係止用歯片21を設けて成る。透明筒状部材11の先端面と、袋ナット13の内鍔部内面との間に、このパイプ引抜阻止部材１が、挾着されている。自由状態で、歯片21が管継手内方向に傾斜している。そして、矢印Ａ方向へパイプＰを挿入させた後に、パイプＰに引抜力が作用すると、歯片21がパイプＰの外周面に食い込んで係止する。なお、歯片21を含み、軸心直交平面状に管継手内部に設けて、パイプＰの（矢印Ａ方向の）挿入に伴って管継手内方向に傾斜して、強くパイプＰの外周面に摺接（当接）させ、パイプＰの外周面に係止させるも望ましい（図示省略）。
なお、パイプＰの挿入に伴って、係止用歯片21が管継手内方向へ弾性変形するのを許容する（逃げを与える）ために、筒状内装体30の先端側の内周角部に、面取り状（傾斜状）の切欠部22が形成されている。 Further, the transparent cylindrical member 11 has a mounting hole portion 18 to be fitted into the medium diameter cylindrical portion 8.
The pipe pull-out prevention member 1 will be described below. As illustrated in FIGS. 1, 2, 2, 5, 6, and 13, the pipe pull-out prevention member 1 is made of a thin metal plate material, and is an annular flat plate that is radially formed from the inner peripheral edge. A large number of slits 19 are formed, and a large number of locking tooth pieces 21 are provided. The pipe pull-out prevention member 1 is attached between the distal end surface of the transparent cylindrical member 11 and the inner surface of the inner flange portion of the cap nut 13. In the free state, the tooth piece 21 is inclined inward of the pipe joint. Then, after the pipe P is inserted in the direction of the arrow A, when a pulling force acts on the pipe P, the tooth piece 21 bites into the outer peripheral surface of the pipe P and is locked. It includes a tooth piece 21 and is provided in the pipe joint in a plane orthogonal to the axial center, and is inclined inward in the pipe joint as the pipe P is inserted (in the direction of arrow A). It is also desirable to make a sliding contact (contact) and to engage with the outer peripheral surface of the pipe P (not shown).
In order to allow the locking tooth piece 21 to be elastically deformed inward in the pipe joint with insertion of the pipe P (giving relief), an inner peripheral corner portion on the distal end side of the cylindrical interior body 30 Further, a chamfered (inclined) cutout 22 is formed.

そして、33は、パイプ未挿入状態で、挿入筒部３の先端近傍の外周面と、パイプ引抜阻止部材１の内端縁にて保持されたリング体であり、このリング体33は、その外周面に於て、内方縮径テーパ面33Ａと、このテーパ面33Ａの外方端の外形寸法よりも小さな外径寸法の被敲き面33Ｃとを、有する片ヤジリ型である。このリング体33は、挿入されてくるパイプＰの先端面28に当接状として、図５（Ａ）から図５（Ｂ）、さらに、図６（Ａ）から図６（Ｂ）（図２）に順次示す如く、奥方へ移動する。
筒状内装体30は、図１〜図６に示したように、内方端30Ａから軸心方向に複数本（図３では６本）のスリット30Ｂを形成することによって、弾性変形自在な花弁片30Ｃを形成する。つまり、図３では、６枚の花弁片30Ｃが形成されており、この花弁片30Ｃの横断面形状は円弧状である。しかも、この花弁片30Ｃの先端には、内鍔状としてラジアル内方向に折曲った敲き凸部31が連設されている。 Reference numeral 33 denotes a ring body that is held by the outer peripheral surface near the tip of the insertion tube portion 3 and the inner end edge of the pipe pull-out prevention member 1 in a state where the pipe is not inserted. In the surface, it is a one-sided type having a taper surface 33A with an inner diameter reduction and a surface 33C having a smaller outer diameter than the outer dimension of the outer end of the taper surface 33A. The ring body 33 is in contact with the distal end surface 28 of the pipe P to be inserted, and is shown in FIGS. 5 (A) to 5 (B), and FIG. 6 (A) to FIG. 6 (B) (FIG. 2). ) Move to the back as shown in order.
As shown in FIGS. 1 to 6, the tubular interior body 30 has a plurality of slits 30 </ b> B (six in FIG. 3) in the axial direction from the inner end 30 </ b> A, thereby allowing elastic deformation of the petals. A piece 30C is formed. That is, in FIG. 3, six petal pieces 30C are formed, and the cross-sectional shape of the petal pieces 30C is an arc shape. In addition, at the tip of the petal piece 30C, there is a continuous protruding convex portion 31 bent in the radial inward direction as an inner collar shape.

図１→図５（Ａ）→図５（Ｂ）→図６（Ａ）と順次示すように、パイプＰの挿入（矢印Ａ参照）に伴って、パイプ先端面28にて押圧されながらリング体33が奥方へ移動してゆくが、その途中で、テーパ面33Ａが筒状内装体30の花弁片30Ｃの内方端を、図６（Ａ）に示す矢印Ｆのように、拡開させるように弾性変形させる。具体的に、花弁片30Ｃの内方端の敲き凸部31に摺接しつつテーパ面33Ａによって拡開状に弾性変形させる。この花弁片30Ｃの弾性変形に伴うラジアル内方向への弾発付勢力によって、図６（Ｂ）に示す如く、花弁片30Ｃの内方端30Ａ―――敲き凸部31―――が、リング体33の被敲き面33Ｃを、強く敲き、「バチッ」「バン」等の大きな音、つまり、接続完了報知音Ｈを発生する。この報知音Ｈを作業者が耳で聴けば正規の深さまでパイプＰを管挿入内部まで挿入して、正規の作業完了を確認できる（図６（Ｂ））。しかも激しい一瞬の振動をも、手で感じ得る。
図６（Ｂ）に於て、矢印Ｇは、弾性的に弓形に弾性変形（図６（Ａ）参照）した花弁片30Ｃが、その弾発付勢力によって復元する閉脚方向への瞬間的な動きを示し、図６（Ｂ）中の矢印Ｋは、敲き凸部31が被敲き面33Ｃを敲く瞬発的なベクトルを示す。 As shown in the order of FIG. 1 → FIG. 5 (A) → FIG. 5 (B) → FIG. 6 (A), the ring body is pressed while being pushed by the pipe tip surface 28 as the pipe P is inserted (see arrow A). In the middle of the movement, the taper surface 33A expands the inner end of the petal piece 30C of the tubular interior body 30 as shown by the arrow F in FIG. 6A. To be elastically deformed. Specifically, the petals 30C are elastically deformed in an expanded shape by the taper surface 33A while being in sliding contact with the whirling convex portion 31 at the inner end of the petal piece 30C. As shown in FIG. 6 (B), the inward end 30A of the petal piece 30C--the whirling convex portion 31 --- is caused by the elastic urging force in the radial direction accompanying the elastic deformation of the petal piece 30C. The surface 33C of the ring body 33 is strongly struck to generate a loud sound such as “buzz” or “bang”, that is, a connection completion notification sound H. When the operator listens to the notification sound H with his / her ear, the pipe P is inserted to the inside of the tube insertion to the proper depth, and the normal work completion can be confirmed (FIG. 6B). Moreover, you can feel intense vibrations with your hands.
In FIG. 6B, an arrow G indicates an instantaneous movement in the closing leg direction in which the petal piece 30C elastically deformed elastically into an arcuate shape (see FIG. 6A) is restored by its elastic urging force. An arrow K in FIG. 6B indicates an instantaneous vector in which the whirling convex portion 31 whirls the surface to be scrubbed 33C.

ところで、図１に示したパイプ未挿入状態下では、筒状内装体30の花弁片30Ｃは、弾性変形を生ずるような外力を全く受けていない、自由状態を保っている。従って、本発明に係る管継手が倉庫、工場、工事現場等に長期間保管されたままであったり、あるいは長距離輸送のために未使用のままで長期間が経過した場合、筒状内装体30がプラスチック製であっても、クリープによる永久変形を生ずる虞がないという、利点を有する。
また、図１〜図６に示したリング体33は、内周奥方側角部を面取りしたテーパ面33Ｄを有している。パイプＰの挿入の際に、パイプＰの先端面28のエッジ28Ａによって、シール材４，５が傷付くことを防止するための、シール材４，５を押え込んで案内するパイプ誘導機能を、上記リング体33は、そのテーパ面33Ｄによって、発揮する。 By the way, in the pipe non-insertion state shown in FIG. 1, the petal piece 30C of the cylindrical interior body 30 is kept free from any external force that causes elastic deformation. Therefore, when the pipe joint according to the present invention is stored in a warehouse, a factory, a construction site, etc. for a long time, or is unused for a long-distance transportation and a long time elapses, the tubular inner body 30 Even if it is made of plastic, there is an advantage that permanent deformation due to creep does not occur.
Moreover, the ring body 33 shown in FIGS. 1-6 has the taper surface 33D which chamfered the inner peripheral back side corner | angular part. In order to prevent the sealing materials 4 and 5 from being damaged by the edge 28A of the front end surface 28 of the pipe P when the pipe P is inserted, a pipe guiding function for pressing and guiding the sealing materials 4 and 5 is provided. The ring body 33 is exhibited by the tapered surface 33D.

そして、上記リング体33が筒状内装体30の花弁片30Ｃによって敲かれて接続完了報知音Ｈを発生する奥方位置（図６（Ｂ）（Ｃ）参照）に於て、リング体33を包囲している筒状部材11を透明とすると共に、リング体33は、その全体又は外周面33Ｚが、注意喚起用有彩色を有し、上記奥方位置（図６（Ｂ）（Ｃ）参照）に於て、外部から、注意喚起用有彩色を目視可能である（図６（Ｃ））。上記筒状内装体30は不透明であるので、図５（Ａ）ではリング体33が隠れていたが、図６（Ｃ）ではリング体33を確実に目視できる。しかも、このリング体33は、閉円環状であって、図６（Ｃ）のように、目視する際に、 360°のいずれのラジアル方向からでも、リング体33を確実に目視できる。   The ring body 33 surrounds the ring body 33 at a back position (see FIGS. 6B and 6C) where the ring body 33 is hit by the petal piece 30C of the cylindrical interior body 30 and generates the connection completion notification sound H. The cylindrical member 11 is transparent, and the ring body 33 has an entire or outer peripheral surface 33Z having a chromatic color for alerting, and is located at the above-mentioned back position (see FIGS. 6B and 6C). However, the chromatic color for alerting can be visually observed from the outside (FIG. 6C). Since the cylindrical interior body 30 is opaque, the ring body 33 is hidden in FIG. 5A, but the ring body 33 can be reliably seen in FIG. 6C. Moreover, the ring body 33 has a closed annular shape, and as shown in FIG. 6C, the ring body 33 can be surely viewed from any radial direction of 360 °.

次に、参考例について、説明すると、図７と図８に於て、11は透明筒状部材であって、継手本体２の中径筒部８に密嵌状に取着され、外鍔部９にて、係止状に抜止めされている。この透明筒状部材11は、先端側に雄ネジ部12を有し、袋ナット13が螺着される。
また、透明筒状部材11は、軸心方向中間部が大径に形成され、上記雄ネジ部12は僅かに小径として軸心方向先端側に設けられ、軸心方向基端側は緩やかに縮径する嵌着部14を有しており、この嵌着部14が中径筒部８に取着される。
そして、この透明筒状部材11の内部の孔部の軸心方向中間位置から先端開口部まで、中間段付部15を介して、大径の嵌着用孔部16を形成し、この嵌着用孔部16に不透明筒体20を嵌着する。 Next, a reference example will be described. In FIGS. 7 and 8, reference numeral 11 denotes a transparent cylindrical member, which is attached to the middle-diameter cylindrical portion 8 of the joint body 2 in a close fitting manner, and has an outer flange portion. At 9, it is retained in a locking manner. The transparent cylindrical member 11 has a male threaded portion 12 on the distal end side, and a cap nut 13 is screwed thereon.
Further, the transparent cylindrical member 11 has an axially middle portion formed in a large diameter, the male screw portion 12 is provided with a slightly small diameter on the distal end side in the axial center direction, and the proximal end side in the axial center direction is gradually contracted. A fitting portion 14 having a diameter is provided, and the fitting portion 14 is attached to the medium diameter cylindrical portion 8.
Then, a large-diameter fitting hole portion 16 is formed through an intermediate stepped portion 15 from the axial center direction intermediate position of the hole portion inside the transparent cylindrical member 11 to the tip opening portion, and this fitting hole The opaque cylinder 20 is fitted to the portion 16.

また、透明筒状部材11は、上記中間段付部15より基端側には、継手本体２の外鍔部９の外径寸法に略等しい内径寸法の基本孔部17と、中径筒部８の外径寸法に略等しい内径寸法の取付孔部18を有している。
不透明筒体20の肉厚寸法を、段付部15の段差寸法よりも、大きく設定し、不透明筒体20の内周面の内径寸法Ｄ20が、上記基本孔部17の内径寸法Ｄ17よりも、小さく設定する。
パイプ引抜阻止部材１について以下説明すると、図７と図13に例示するように、金属薄板材から成り、円環状平板体であって内周縁から放射状に多数のスリット19を形成して、多数の係止用歯片21を設けて成る。図７に示すように、透明筒状部材11と不透明筒体20の先端面と、袋ナット13の内鍔部内面との間に、このパイプ引抜阻止部材１が、挾着されている。自由状態で、図７のように歯片21が管継手内方向に傾斜している。そして、矢印Ａ方向へパイプＰを挿入させた後に、パイプＰに引抜力が作用すると、歯片21がパイプＰの外周面に食い込んで係止する。なお、歯片21を含み、軸心直交平面状に管継手内部に設けて、パイプＰの（矢印Ａ方向の）挿入に伴って管継手内方向に傾斜して、強くパイプＰの外周面に摺接（当接）させ、パイプＰの外周面に係止させるも望ましい（図示省略）。
なお、パイプＰの挿入に伴って、係止用歯片21が管継手内方向へ弾性変形するのを許容する（逃げを与える）ために、不透明筒体20の先端側の内周角部に、切欠部22が形成されている。 Further, the transparent cylindrical member 11 includes a basic hole portion 17 having an inner diameter dimension substantially equal to the outer diameter dimension of the outer flange portion 9 of the joint body 2 and a medium diameter cylindrical portion on the proximal end side from the intermediate stepped portion 15. 8 has a mounting hole portion 18 having an inner diameter dimension substantially equal to the outer diameter dimension of eight.
The wall thickness of the opaque cylinder 20, than the level difference of the stepped portion 15, is set large, the inner diameter D 20 of the inner peripheral surface of the opaque cylinder 20, than the inner diameter D 17 of the basic opening 17 Also set it small.
The pipe drawing prevention member 1 will be described below. As shown in FIGS. 7 and 13, the pipe drawing prevention member 1 is made of a thin metal plate material, is an annular flat plate body, and has a large number of slits 19 formed radially from the inner periphery. A locking tooth piece 21 is provided. As shown in FIG. 7, the pipe pull-out prevention member 1 is attached between the transparent cylindrical member 11, the distal end surface of the opaque cylindrical body 20, and the inner flange portion inner surface of the cap nut 13. In a free state, the tooth piece 21 is inclined inward of the pipe joint as shown in FIG. Then, after the pipe P is inserted in the direction of the arrow A, when a pulling force acts on the pipe P, the tooth piece 21 bites into the outer peripheral surface of the pipe P and is locked. It includes a tooth piece 21 and is provided in the pipe joint in a plane orthogonal to the axial center, and is inclined inward in the pipe joint as the pipe P is inserted (in the direction of arrow A). It is also desirable to make a sliding contact (contact) and to engage with the outer peripheral surface of the pipe P (not shown).
In addition, in order to allow the locking tooth piece 21 to be elastically deformed inwardly in the pipe joint with insertion of the pipe P (giving relief), an inner peripheral corner portion on the distal end side of the opaque cylinder 20 is provided. A notch 22 is formed.

そして、25は、図７と図８（Ａ）の状態でラジアル外方向に常に弾発付勢力を発揮している弾性Ｃリングである。パイプ未挿入状態で、管継手内部空間Ｓの一部を形成する不透明筒体20の内周面23に、弾性Ｃリング25はラジアル外方向の弾発付勢力をもって圧接している。即ち、不透明筒体20の内周面23は、管継手内部空間Ｓの外周面側の一部を形成すると共に、パイプ未挿入状態の弾性Ｃリング25が圧接保持される保持用内周面であるといえる。 Then, 25 is an elastic C-ring which exerts a constantly elastic urging force in the radial outer direction in a state of FIG. 7 and FIG. 8 (A). When the pipe is not inserted, the elastic C-ring 25 is in pressure contact with the inner peripheral surface 23 of the opaque cylindrical body 20 that forms a part of the pipe joint internal space S with a radially outward elastic urging force. In other words, the inner peripheral surface 23 of the opaque cylindrical body 20 forms a part of the outer peripheral surface side of the pipe joint internal space S and is an inner peripheral surface for holding on which the elastic C-ring 25 in a pipe non-inserted state is pressed and held. It can be said that there is.

この弾性Ｃリング25は、横断面正方形乃至矩形状である。そして、図７から図８（Ａ）に示すように、矢印Ａのように、外部から、管継手内部空間Ｓに挿入されてくるパイプＰの先端面28に当接状として、ベクトルＧを図８（Ａ）の如く受けて押圧され、奥方へ（管継手内方へ）移動する。 This elastic C-ring 25 has a square or rectangular cross section. Then, as shown in FIG. 7 to FIG. 8 (A), as indicated by an arrow A, the vector G is shown in contact with the distal end surface 28 of the pipe P inserted into the pipe joint internal space S from the outside. It is received and pressed as shown in FIG. 8 (A), and moves to the back (inward of the pipe joint).

ところで、基本孔部17は内部空間の一部を構成していると共に、既述したように、基本孔部17の内径寸法Ｄ17は、不透明筒体20の内周面の内径寸法Ｄ20よりも、大に設定されている。言い換えると、保持用内周面23の内径寸法がＤ20であり、さらに、この保持用内周面23の奥方側―――管継手内方側―――に隣設する基本孔部17の内径寸法Ｄ17は上記内径寸法Ｄ20よりも大である。従って、弾性Ｃリング25は、図８（Ａ）から（Ｂ）の如く、自身の弾発付勢力で拡径方向に弾性変形しつつ、保持用内周面23の奥方側に隣設する基本孔部17の大径内周面27に、拡径衝突する。図８（Ｂ）の矢印Ｃは、このときのＣリング25の動きを示す。 Incidentally, the basic hole portion 17 constitutes a part of the internal space, and as described above, the inner diameter dimension D 17 of the basic hole portion 17 is larger than the inner diameter dimension D 20 of the inner peripheral surface of the opaque cylindrical body 20. Also set to great. In other words, the inner diameter of the holding inner peripheral surface 23 is D 20, further basic hole 17 adjacently provided on the deeper side --- pipe joint inner side --- the holding inner peripheral surface 23 The inner diameter dimension D 17 is larger than the inner diameter dimension D 20 . Accordingly, as shown in FIGS. 8A to 8B, the elastic C-ring 25 is basically arranged adjacent to the inner side of the holding inner peripheral surface 23 while being elastically deformed in the diameter increasing direction by its own elastic urging force. The diameter 17 collides with the large-diameter inner peripheral surface 27 of the hole 17. An arrow C in FIG. 8B indicates the movement of the C-ring 25 at this time.

弾性Ｃリング25の外周面が、大径内周面27に拡径衝突すると同時に、例えば、「バチッ」「バン」等の大きな音―――即ち、接続完了報知音Ｈ―――を発生する。この接続完了報知音Ｈを作業者が耳で聴けば、正規の深さまでパイプＰを管継手内部に挿入して、正規の作業完了を確認できる（図８（Ｂ）参照）。しかも、この参考例によれば、激しい一瞬の振動をも、手に感じることができるので、一層確実に作業完了を確認することが可能である。 At the same time that the outer peripheral surface of the elastic C ring 25 collides with the large inner peripheral surface 27, a loud sound such as “buzz” or “bang” —that is, a connection completion notification sound H— is generated. . If the operator listens to the connection completion notification sound H with his / her ear, the pipe P can be inserted into the pipe joint to the proper depth, and the normal work completion can be confirmed (see FIG. 8B). In addition, according to this reference example , it is possible to feel intense instantaneous vibrations in the hand, so that it is possible to confirm the completion of the work more reliably.

そして、弾性Ｃリング25をパイプ未挿入状態で保持する保持用内周面23は、上述したように、不透明筒体20をもって構成され、パイプ未挿入の状態では、図７に於て、目視にて、Ｃリング25を確認（目視）できない。
しかしながら、大径内周面27は、上述したように、透明筒状部材11をもって構成され、上記拡径衝突した後は、図８（Ｃ）に示す如く、弾性Ｃリング25の約 360°に渡って、目視可能である。
ここで、弾性Ｃリング25は、横断面形状が正方形（又は矩形）であり、大径内周面27に対して、Ｃリング25の外周面は、図８（Ｃ）のように、密接状態となり、大径内周面27の水滴膜等があっても、鮮明にＣリング25を、略 360°のいずれの方向からでも目視できる。
望ましくは、Ｃリング25は、外周面又は全体―――つまり、少なくとも外周面―――に赤色や黄色等の注意喚起用有彩色をもって、形成し、大径内周面27に拡径衝突した後は、Ｃリング25の外周面26が、透明筒状部材11を通して、外部から上記注意喚起用有彩色を、目視可能とするのが良い。 The holding inner peripheral surface 23 for holding the elastic C-ring 25 in the pipe non-inserted state is constituted by the opaque cylindrical body 20 as described above. In the state in which the pipe is not inserted, in FIG. The C-ring 25 cannot be confirmed (visually).
However, the large-diameter inner peripheral surface 27 is constituted by the transparent cylindrical member 11 as described above, and after the diameter-expanding collision, as shown in FIG. It is visible across.
Here, the elastic C-ring 25 has a square (or rectangular) cross-sectional shape, and the outer peripheral surface of the C-ring 25 is in close contact with the large-diameter inner peripheral surface 27 as shown in FIG. Thus, even if there is a water drop film or the like on the large-diameter inner peripheral surface 27, the C-ring 25 can be clearly seen from any direction of approximately 360 °.
Desirably, the C-ring 25 is formed with a chromatic color for alerting such as red or yellow on the outer peripheral surface or the whole--that is, at least the outer peripheral surface--and collided with the large-diameter inner peripheral surface 27 in a diameter expansion manner. After that, it is preferable that the outer peripheral surface 26 of the C-ring 25 is visible through the transparent cylindrical member 11 from the outside for the chromatic color for alerting.

Ｃリング25の外周面を有彩色にするには、有彩色の塗装や有彩色フィルム接着等にて製造し、また、全体を有彩色とするには、プラスチックにて成型時に断面内部まで有彩色とするか、又は、外面に有彩色の塗装を行う。
Ｃリング25であるので、約 360°にわたって、いずれの方向からでも有彩色を簡単に、目視可能であり、かつ、Ｃリング25の外周面26は大径内周面27に弾発力にて密接しているので、目視が確実・容易となる。 To make the outer surface of the C-ring 25 chromatic, it is manufactured by chromatic painting or chromatic film adhesion. To make the entire chromatic color, chromatic color is used up to the inside of the cross section when molded with plastic. Or, paint chromatic color on the outer surface.
Since it is a C-ring 25, the chromatic color can be easily seen from any direction over approximately 360 °, and the outer peripheral surface 26 of the C-ring 25 is elastically applied to the large-diameter inner peripheral surface 27. The close contact ensures reliable and easy visual inspection.

次に、図９〜図12は、他の参考例を示す。図９は図７に、図10は図８（Ａ）に、図11は図８（Ｂ）(Ｃ）に、夫々、概略対応した図である。同一符号は、同様の構成を示すので、重複説明を省略するが、図９〜図12に示す他の参考例の特徴は次の通りである。
即ち、弾性Ｃリング25は、内周奥方側角部を面取りしたテーパ面35を有している。パイプＰの挿入の際に、パイプＰの先端面28のエッジ28Ａによって、シール材４，５が傷付くことを防止するため、シール材４，５を、シール溝奥部方向へ押え込んで、パイプ先端を案内するパイプ誘導機能を、備えている。図10（Ａ）に於ては、２個の内の外方側のシール材（Ｏリング）４をラジアル内方向へ押圧して、パイプＰの内周角エッジ28Ａがシール材（Ｏリング）４に接触しない状態で、パイプ先端がシール材（Ｏリング）４を乗り越えるようにするパイプ誘導案内機能と具備している。引続き、他のシール材（Ｏリング）５も同様である。 Next, FIGS. 9 to 12 show other reference examples . 9 is a schematic diagram corresponding to FIG. 7, FIG. 10 is a schematic diagram corresponding to FIG. 8A, and FIG. 11 is a schematic diagram corresponding to FIGS. Since the same reference numerals indicate the same configuration, repeated description is omitted, but the features of other reference examples shown in FIGS. 9 to 12 are as follows.
In other words, the elastic C-ring 25 has a tapered surface 35 with chamfered inner corners on the inner side. In order to prevent the sealing materials 4 and 5 from being damaged by the edge 28A of the distal end surface 28 of the pipe P when the pipe P is inserted, the sealing materials 4 and 5 are pressed in the depth direction of the sealing groove, A pipe guiding function for guiding the pipe tip is provided. In FIG. 10A, the inner peripheral edge 28A of the pipe P is sealed (O-ring) by pressing the outer seal material (O-ring) 4 of the two inward in the radial direction. The pipe guide and guide function is provided so that the pipe tip can get over the seal material (O-ring) 4 without contacting the pipe 4. The same applies to the other sealing materials (O-rings) 5.

パイプ未挿入状態下で、Ｃリング25の待機位置が、図７に比較して、相違している。即ち、図７よりも、先端開口寄りに、Ｃリング25が配設されており、先端側のシール材４を少々押え込んだ位置に配設する。なお、寸法上、余裕があれば、少し先端方向に移すのが好ましい。また、図12（Ａ）は、図９〜図11に示したＣリング25であるが、図12（Ｂ）に示すように、矩形状として、テーパ面35を長く形成して、スムースにシール材４，５をシール溝側へ押え込むようにするのも、好ましい。又は、図12（Ｃ）に示すように、テーパ面35をアール形状とするのも好ましい。
また、Ｃリング25は、図９，図10の状態下では、その切れ目が軽く閉じているのが良い。即ち、Ｃリング25の切れ目の両端面が軽く接触して、その切れ目が閉じていることによって、シール材４，５を乗り越える際に、シール材４，５を傷付けないで済む。 Under the pipe is not inserted state, the standby position of the C-ring 25, and compared in Figure 7, are different. That is, the C-ring 25 is disposed closer to the opening of the distal end than in FIG. 7, and is disposed at a position where the sealing material 4 on the distal end side is slightly pressed. In addition, if there is a margin in terms of dimensions, it is preferable to move it slightly toward the tip. Further, FIG. 12A shows the C-ring 25 shown in FIGS. 9 to 11, but as shown in FIG. 12B, a rectangular shape is formed to make the taper surface 35 long and smoothly sealed. It is also preferable to press the materials 4 and 5 into the seal groove side. Alternatively, as shown in FIG. 12C, it is also preferable that the tapered surface 35 has a round shape.
Further, the C-ring 25 is preferably closed lightly in the state shown in FIGS. That is, since both ends of the cut of the C-ring 25 are in light contact with each other and the cut is closed, the seal materials 4 and 5 are not damaged when the seal materials 4 and 5 are moved over.

ところで、図１〜図６、（さらには参考例の図７〜図12）と図13に於て、パイプ引抜阻止部材１としては、図13のような薄い金属板から成る円環状平板材であって、係止用歯片21を多数有するものを例示したが、本発明では、引抜阻止部材１は、これ以外のものとするも自由であって、内周面に係止爪部を有し、袋ナット13の先端内周面を縮径テーパ面として、パイプＰが引き抜かれようとすると、係止爪部がパイプ外周面に食い込むくさび型の部材とする等も、好ましい。
また、管継手として、両端に、図１，図２の右半分の構造が配設されたもの、あるいは、Ｔ字型の継手本体に、図１，図２の右半分の構造が３個配設されたもの等とするも自由である。あるいは、エルボ型とすることも可能である。また、保持用内周面23及び大径内周面27は、図示以外の形状と構造の部品をもって、構成することは自由である。 By the way, in FIGS. 1 to 6 (and FIGS . 7 to 12 of the reference example) and FIG. 13, the pipe pull-out prevention member 1 is an annular flat plate made of a thin metal plate as shown in FIG. However, in the present invention, the pull-out prevention member 1 is free to be other than this, and has a locking claw portion on the inner peripheral surface. It is also preferable to use a wedge-shaped member in which the locking claw portion bites into the outer peripheral surface of the pipe P when the pipe P is about to be pulled out with the inner peripheral surface at the tip of the cap nut 13 being a tapered diameter surface.
Also, as pipe joints, the right half structure of FIGS. 1 and 2 is arranged at both ends, or three right half structures of FIGS. 1 and 2 are arranged on a T-shaped joint body. It is free even if it is set up. Alternatively, an elbow type is also possible. Further, the holding inner peripheral surface 23 and the large-diameter inner peripheral surface 27 can be freely configured with parts having shapes and structures other than those illustrated.

本発明は、以上詳説したように、パイプ引抜阻止部材１を備えた管継手に於て；外周に、内方縮径テーパ面33Ａと、該テーパ面33Ａの外方端の外径寸法よりも小さな外径寸法の被敲き面33Ｃとを有し、挿入されてくるパイプＰの先端面28に当接状として押圧され、奥方へ移動するリング体33と；内方端30Ａから軸心方向に複数本のスリット30Ｂを形成することによって構成される弾性変形自在な花弁片30Ｃを複数枚有し、管継手内部に保持される筒状内装体30と、を備え；パイプＰの挿入に伴って、上記リング体33が奥方へ移動して、上記テーパ面33Ａが上記筒状内装体30の上記花弁片30Ｃの内方端を拡開させるように弾性変形させ、上記花弁片30Ｃの該弾性変形に伴うラジアル内方向への弾発付勢力によって、上記リング体33の上記被敲き面33Ｃを、上記花弁片30Ｃの内方端が敲き、接続完了報知音Ｈを発生するように構成したので、作業者は、十分に深く、正規位置までパイプを挿入して、接続完了（施工完了）を、耳をもって聴くことによって、確認できる。また、花弁片30Ｃに、パイプ未挿入状態下では、（弾性変形を生じない）自由状態として、プラスチックのクリープを防止して、長期間未使用状態下でも、新品の如く、作業完了（施工完了）を耳に響かせる大きな報知音Ｈを発生する。   As described in detail above, the present invention provides a pipe joint provided with the pipe drawing-out preventing member 1; on the outer periphery, on the inner diameter-reduced tapered surface 33A, and on the outer diameter of the outer end of the tapered surface 33A. A ring body 33 having a small outer diameter surface 33C, pressed in contact with the distal end surface 28 of the inserted pipe P, and moved to the back; axial direction from the inner end 30A A plurality of elastically deformable petal pieces 30C formed by forming a plurality of slits 30B in the tube, and a cylindrical inner body 30 held inside the pipe joint; Then, the ring body 33 moves to the back, and the taper surface 33A is elastically deformed so as to expand the inner end of the petal piece 30C of the tubular interior body 30, so that the elasticity of the petal piece 30C is increased. Due to the elastic biasing force in the radial inward direction accompanying the deformation, Since the inner end of the petal piece 30C is rolled and generates a connection completion notification sound H, the operator inserts the pipe deeply into the normal position and completes the connection (construction completion). You can confirm by listening with your ears. In addition, when the pipe is not inserted into the petal piece 30C, the plastic is prevented from creeping in a free state (not causing elastic deformation), and the work is completed as if it were new even when the pipe is not used for a long period of time. ) Is generated with a loud notification sound H.

また、上記リング体33は、内周奥方側角部を面取りしたテーパ面33Ｄを有し、パイプＰの挿入の際に、パイプＰの先端面28のエッジ28Ａによってシール材４，５が傷付くことを防止するためシール材４，５を押え込んで案内するパイプ誘導機能を備えているので、リング体33は、一石二鳥の働きを行い、内部構成部品は少なくて済む。特に、パイプＰを切断したままで、角張っていたり、薄突片が鋭く出ている切断端部のエッジ28Ａがシール材４，５を乗り越える直前に、シール材４，５をシール溝側へ押え込んで、安全に乗り越える（誘導する）ので、シール材４，５が接続作業時に傷付くことを減少できる。   Further, the ring body 33 has a tapered surface 33D having a chamfered inner corner on the inner peripheral side, and when the pipe P is inserted, the sealing members 4 and 5 are damaged by the edge 28A of the distal end surface 28 of the pipe P. In order to prevent this, a pipe guiding function for pressing and guiding the sealing materials 4 and 5 is provided, so that the ring body 33 functions as two birds with one stone and requires fewer internal components. In particular, while the pipe P is cut, the sealing material 4 and 5 is pressed toward the seal groove immediately before the edge 28A of the cut end where the square protrusion or the thin protruding piece protrudes over the sealing material 4 or 5. Therefore, the sealing materials 4 and 5 can be prevented from being damaged during the connection work.

また、パイプ未挿入状態下では、上記筒状内装体30の上記花弁片30Ｃは、弾性変形を生ずる外力を受けない、自由状態を保っているので、筒状内装体30を安価で製造し易いプラスチックとすることができる。即ち、プラスチック特有のクリープ現象の発生を防止できて、長期間未使用の後でも、新品と変わらない弾発力をもって、大きな報知音Ｈを安定して発する。   Further, when the pipe is not inserted, the petal piece 30C of the cylindrical interior body 30 is not subjected to an external force that causes elastic deformation, and is kept in a free state. Therefore, the cylindrical interior body 30 can be easily manufactured at low cost. Can be plastic. That is, the occurrence of the creep phenomenon peculiar to plastics can be prevented, and even after a long period of non-use, a large notification sound H is stably emitted with a resilience that is the same as that of a new product.

また、上記リング体33が上記花弁片30Ｃによって敲かれて上記接続完了報知音Ｈを発生する奥方位置に於て、上記リング体33を包囲している筒状部材11を透明とすると共に、上記リング体33は、全体又は外周面33Ｚが注意喚起用有彩色を有し、上記奥方位置に於て、外部から上記注意喚起用有彩色を目視可能に構成されているので、容易かつ確実に、接続完了（施工完了）を感知できる。特に、騒音のある現場にて有効である。 In addition, the tubular member 11 surrounding the ring body 33 is made transparent at the back position where the ring body 33 is hit by the petal piece 30C and generates the connection completion notification sound H. Since the ring body 33 has a chromatic color for alerting as a whole or an outer peripheral surface 33Z, and the chromatic color for alerting is visible from the outside at the back position, it can be easily and reliably. Can detect connection completion (construction completion). This is particularly effective at sites with noise .

１ パイプ引抜阻止部材
４，５ シール材（Ｏリング）
11 透明筒状部材
26 外周面
28 先端面
28Ａ エッジ
30 筒状内装体
30Ａ 内方端
30Ｂ スリット
30Ｃ 花弁片
33 リング体
33Ａ 内方縮径テーパ面
33Ｃ 被敲き面
33Ｄ テーパ面
33Ｚ 外周面
Ｈ 接続完了報知音
Ｐ パイプ 1 Pipe withdrawal prevention member 4, 5 Sealing material (O-ring)
11 transparent tubular member
26 outer peripheral surface
28 Tip surface
28A edge
30 Tubular interior
30A inner end
30B slit
30C petal pieces
33 Ring body
33A Inner diameter taper surface
33C surface to be covered
33D Tapered surface
33Z outer peripheral surface
H connection completion notification sound P pie-flops

Claims (4)

パイプ引抜阻止部材（１）を備えた管継手に於て、
外周に、内方縮径テーパ面（33Ａ）と、該テーパ面（33Ａ）の外方端の外径寸法よりも小さな外径寸法の被敲き面（33Ｃ）とを有し、挿入されてくるパイプ（Ｐ）の先端面（28）に当接状として押圧され、奥方へ移動するリング体（33）と、
内方端（30Ａ）から軸心方向に複数本のスリット（30Ｂ）を形成することによって構成される弾性変形自在な花弁片（30Ｃ）を複数枚有し、管継手内部に保持される筒状内装体（30）と、を備え、
パイプ（Ｐ）の挿入に伴って、上記リング体（33）が奥方へ移動して、上記テーパ面（33Ａ）が上記筒状内装体（30）の上記花弁片（30Ｃ）の内方端を拡開させるように弾性変形させ、上記花弁片（30Ｃ）の該弾性変形に伴うラジアル内方向への弾発付勢力によって、上記リング体（33）の上記被敲き面（33Ｃ）を、上記花弁片（30Ｃ）の内方端が敲き、接続完了報知音（Ｈ）を発生するように構成したことを特徴とする管継手。 In the pipe joint provided with the pipe withdrawal prevention member (1),
On the outer periphery, the taper surface (33A) having an inwardly reduced diameter and a surface to be polished (33C) having an outer diameter smaller than the outer diameter of the outer end of the taper surface (33A) are inserted. A ring body (33) that is pressed in contact with the tip surface (28) of the round pipe (P) and moves to the back;
A cylindrical shape having a plurality of elastically deformable petal pieces (30C) configured by forming a plurality of slits (30B) in the axial direction from the inner end (30A) and held inside the pipe joint An interior body (30),
As the pipe (P) is inserted, the ring body (33) moves to the back, and the tapered surface (33A) moves the inner end of the petal piece (30C) of the cylindrical interior body (30). The surface to be scraped (33C) of the ring body (33) is elastically deformed so that the petal piece (30C) is elastically energized in the radial direction along with the elastic deformation of the petal piece (30C). A pipe joint characterized in that the inner end of the petal piece (30C) is rolled and generates a connection completion notification sound (H). 上記リング体（33）は、内周奥方側角部を面取りしたテーパ面（33Ｄ）を有し、パイプ（Ｐ）の挿入の際に、パイプ（Ｐ）の先端面（28）のエッジ（28Ａ）によってシール材（４）（５）が傷付くことを防止するためシール材（４）（５）を押え込んで案内するパイプ誘導機能を備えている請求項１記載の管継手。   The ring body (33) has a tapered surface (33D) having a chamfered inner corner on the inner peripheral side. When the pipe (P) is inserted, the edge (28A) of the tip surface (28) of the pipe (P) is inserted. The pipe joint according to claim 1, further comprising a pipe guiding function for pressing and guiding the sealing materials (4) and (5) in order to prevent the sealing materials (4) and (5) from being damaged by the above. パイプ未挿入状態下では、上記筒状内装体（30）の上記花弁片（30Ｃ）は、弾性変形を生ずる外力を受けない、自由状態を保っている請求項１記載の管継手。   2. The pipe joint according to claim 1, wherein the petal piece (30 </ b> C) of the cylindrical interior body (30) is not subjected to an external force that causes elastic deformation when the pipe is not inserted. 上記リング体（33）が上記花弁片（30Ｃ）によって敲かれて上記接続完了報知音（Ｈ）を発生する奥方位置に於て、上記リング体（33）を包囲している筒状部材（11）を透明とすると共に、上記リング体（33）は、全体又は外周面（33Ｚ）が注意喚起用有彩色を有し、上記奥方位置に於て、外部から上記注意喚起用有彩色を目視可能に構成されている請求項１，２又は３記載の管継手。 A cylindrical member (11) surrounding the ring body (33) at a back position where the ring body (33) is hit by the petal piece (30C) and generates the connection completion notification sound (H). ) Is transparent, and the ring body (33) has a chromatic color for alerting the whole or outer peripheral surface (33Z), and the chromatic color for alerting can be visually observed from the outside at the back position. claim 1, 2 or 3 pipe joint according is configured.
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