JP2010270867A

JP2010270867A - Quick connector and pipe connecting structure

Info

Publication number: JP2010270867A
Application number: JP2009124648A
Authority: JP
Inventors: Hiroshi Yamada; 裕志山田; Takahiro Shibata; 孝広柴田; Kazushige Sakazaki; 一茂坂崎
Original assignee: Sumitomo Riko Co Ltd
Current assignee: Sumitomo Riko Co Ltd
Priority date: 2009-05-22
Filing date: 2009-05-22
Publication date: 2010-12-02

Abstract

<P>PROBLEM TO BE SOLVED: To provide a quick connector having a retainer having also a connection confirming function. <P>SOLUTION: The retainer 5 is formed of a connecting part 97 and a pair of elastic leg parts 99 respectively formed in both end parts of this connecting part 97. A confirming slipping-out preventive part 101 is arranged so as to extend inside in the radial direction from the other side in the length direction in an intermediate part in the width direction of an inner surface of the connecting part 97. A pair of clamp arms 105 are arranged in an inner end part of the confirming slipping-out preventive part 101 so as to be capable of sandwiching an outer peripheral surface of a pipe body 33. An engaging part 111 projecting inside is formed in a tip part of the elastic leg parts 99. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、例えば自動車の燃料配管に用いられるクイックコネクタ及びこのクイックコネクタを用いた配管接続構造に関する。 The present invention relates to a quick connector used for, for example, a fuel pipe of an automobile and a pipe connection structure using the quick connector.

自動車の燃料配管には、軽くて取り扱い性に優れ、高い耐燃料透過性を有する樹脂チューブが用いられているが、この樹脂チューブを燃料タンクなどの自動車機器に連結するには、樹脂チューブの長さ方向端部にクイックコネクタを取り付けて配管用接続体を構成し、燃料タンク等に突設形成したパイプ体にこのクイックコネクタを嵌め付けることにより、配管用接続体をパイプ体に接続している。クイックコネクタは、長さ方向一方側にチューブ接続部を有し、長さ方向他方側にリテーナ保持部が設けられ、内周面に環状シール部材を備えたシール部が形成されているコネクタハウジングと、このコネクタハウジングのリテーナ保持部に取り付けられたリテーナと、を具備していて、樹脂チューブは、長さ方向端部の嵌め付け部がチューブ接続部の外周にきつく嵌め付けられることにより、クイックコネクタに接続される。チューブ接続部の外周面には、環状の抜け止め突部が形成されていて、抜け止め突部が樹脂チューブの嵌め付け部に食い込むように係合することにより、樹脂チューブはチューブ接続部に抜け止め状態で強固に接続されることとなる。 Resin tubes that are light, easy to handle, and have high fuel permeation resistance are used for automobile fuel piping. To connect these resin tubes to automobile equipment such as fuel tanks, the length of the resin tube A connector for piping is constructed by attaching a quick connector to the end in the vertical direction, and the connector for piping is connected to the pipe body by fitting this quick connector to a pipe body protrudingly formed on a fuel tank or the like. . The quick connector has a tube connecting portion on one side in the length direction, a retainer holding portion on the other side in the length direction, and a connector housing in which a seal portion having an annular seal member is formed on the inner peripheral surface; A retainer attached to the retainer holding portion of the connector housing, and the resin tube is provided with a quick connector by the fitting portion of the end portion in the length direction being tightly fitted to the outer periphery of the tube connecting portion. Connected to. An annular retaining protrusion is formed on the outer peripheral surface of the tube connecting portion. When the retaining protrusion engages so as to bite into the fitting portion of the resin tube, the resin tube is removed from the tube connecting portion. It will be firmly connected in the stopped state.

クイックコネクタが接続されるパイプ体は、外周面に環状係合突部を有していて、この環状係合突部がリテーナと係合することにより、クイックコネクタとパイプ体とが接続される。環状係合突部がリテーナと係合するためには、環状係合突部が所定位置に到達するようにパイプ体がクイックコネクタに相対的に挿入されなければならない。環状係合突部が所定位置に到達する前に、パイプ体のクイックコネクタへの相対的な挿入作業を終了してしまうと、クイックコネクタがパイプ体に正常に接続されていないので、車両の振動などにより、クイックコネクタがパイプ体から抜ける方向にずれて、燃料などの内部流体が漏れ出てしまうおそれがある。 The pipe body to which the quick connector is connected has an annular engagement protrusion on the outer peripheral surface, and the quick connector and the pipe body are connected by engaging the annular engagement protrusion with the retainer. In order for the annular engagement protrusion to engage with the retainer, the pipe body must be relatively inserted into the quick connector so that the annular engagement protrusion reaches a predetermined position. If the relative insertion work of the pipe body into the quick connector is finished before the annular engagement projection reaches the predetermined position, the quick connector is not normally connected to the pipe body, For example, the quick connector may be displaced in the direction of being removed from the pipe body, and the internal fluid such as fuel may leak out.

そこで、例えば特許文献１や特許文献２に記載されているように、係合爪部を有する接続確認用のチェッカーを、リテーナ保持部に形成した係合窓にこの係合爪部が引き抜き方向に係合するように、リテーナ保持部に取り付けておくといったことが行われている。チェッカーの係合爪部は、パイプ体の環状係合突部が所定位置に到達し、リテーナと正常にスナップ係合したときに、この環状係合突部に押されて、係合窓への係合が解除されるように形成されている。したがって、環状係合突部が所定位置に達してパイプ体とクイックコネクタとが正常に接続されているときには、チェッカーの引っ張りリングを引っ張れば、チェッカーがリテーナ保持部から外れることとなる。反対に、環状係合突部が所定位置の手前までしか到達していないため、パイプ体とクイックコネクタとが正常に接続されていない場合には、チェッカーの引っ張りリングを引っ張っても、チェッカーはリテーナ保持部から外れない。このようにして、クイックコネクタとパイプ体との接続状態を正しく確認することができる。 Therefore, for example, as described in Patent Document 1 and Patent Document 2, a checker for connection confirmation having an engaging claw portion is connected to an engaging window formed in the retainer holding portion so that the engaging claw portion is pulled in the pulling direction. For example, it is attached to the retainer holding portion so as to be engaged. When the annular engaging projection of the pipe body reaches a predetermined position and is normally snap-engaged with the retainer, the engaging claw portion of the checker is pushed by the annular engaging projection and enters the engagement window. It is formed so that the engagement is released. Therefore, when the annular engagement protrusion reaches the predetermined position and the pipe body and the quick connector are normally connected, the checker is detached from the retainer holding part by pulling the pulling ring of the checker. On the other hand, since the annular engagement protrusion reaches only before the predetermined position, if the pipe body and the quick connector are not normally connected, the checker can be retained even if the checker pull ring is pulled. Does not come off the holding part. In this way, the connection state between the quick connector and the pipe body can be correctly confirmed.

特開平１１−３４４１８２号公報Japanese Patent Laid-Open No. 11-344182 特開２００３−２５４４８４号公報JP 2003-254484 A

ところで、特許文献１や特許文献２に記載されたパイプ体の接続確認構造では、リテーナとチェッカーとを別部品として有しているので、部品点数が多くなっている。また、特許文献１や特許文献２のクイックコネクタでは、接続確認後にチェッカーが廃棄されるので、クイックコネクタをパイプ体から外し、再びパイプ体に接続する場合に、接続確認を行うことができない。さらに、特許文献１や特許文献２のクイックコネクタでは、接続確認時に、チェッカーをコネクタハウジングから引き抜くので、周辺機器との関係で、迅速な接続確認作業ができない場合がある。 By the way, in the connection confirmation structure of the pipe body described in patent document 1 and patent document 2, since it has a retainer and a checker as separate parts, the number of parts has increased. Further, in the quick connectors of Patent Document 1 and Patent Document 2, since the checker is discarded after the connection is confirmed, the connection cannot be confirmed when the quick connector is detached from the pipe body and connected to the pipe body again. Furthermore, in the quick connectors of Patent Document 1 and Patent Document 2, since the checker is pulled out from the connector housing at the time of connection confirmation, there is a case where quick connection confirmation work cannot be performed in relation to peripheral devices.

そこで本発明は、上記の問題点の少なくとも1つを解決するためのクイックコネクタ及び配管接続構造の提供を目的とする。 Therefore, an object of the present invention is to provide a quick connector and a pipe connection structure for solving at least one of the above problems.

この目的を達成するための本発明のクイックコネクタは、長さ方向一方側にチューブ接続部を有し、長さ方向他方側にリテーナ保持部が設けられ、内周面に環状シール部材を備えたシール部が形成されているコネクタハウジングと、前記コネクタハウジングの前記リテーナ保持部に軸直角方向に差し込まれて取り付け位置に保持されたリテーナと、を具備し、外周面に環状係合突部が形成されたパイプ体が、前記コネクタハウジングのパイプ挿入孔内に相対的に又は所定位置まで相対的に挿入され、前記環状係合突部と前記リテーナとの係合により抜け止め状態で接続される、といったクイックコネクタであって、前記リテーナ保持部には、前記パイプ挿入孔に開口する係合窓が形成され、前記リテーナは、前記環状係合突部と抜け止め状態で係合するように形成された抜け止め部と、前記係合窓と係合して、前記リテーナの差し込み方向の移動を阻止し、前記リテーナを前記取り付け位置に保持する係合部と、を有し、前記係合部は、前記係合窓から前記パイプ挿入孔に入り込み、前記パイプ挿入孔内を相対的に進行する前記環状係合突部と当接する位置まで突出していて、前記リテーナの前記係合部は、前記環状係合突部が抜け止め係合位置又は所定位置に達したときに、前記環状係合突部に押されて、例えば変形し、前記係合窓との係合が解除されるように形成され、前記係合部と前記係合窓との係合が解除されてから、前記リテーナを軸直角方向に押し込むと、前記リテーナは確認固定位置まで移動し、前記抜け止め部が前記環状係合突部と抜け止め状態で係合するものである。リテーナは、係合部の係合窓との係合により、差し込み方向の移動が阻止されるので、リテーナを押し込もうとしても押し込むことができない。しかしながら、パイプ体がコネクタハウジング内に正規に挿入され、パイプ体の環状係合突部が抜け止め係合位置（抜け止め部と係合する位置）又は所定位置に達すると、パイプ体の環状係合突部に押されて係合部は例えば外側に変形移動し、係合部の係合窓との係合が解除される。そうすると、リテーナを軸直角方向にさらに押し込んで確認固定位置まで移動させることができる。そして、リテーナを確認固定位置まで移動させ、同時に、パイプ体が正常にクイックコネクタに接続されていることを確認する。リテーナを確認固定位置まで移動できなければ、パイプ体が正常にクイックコネクタに挿入されていないこととなる。リテーナが取り付け位置に保持されているとき、リテーナの径方向一方側は、リテーナ保持部の外周から突出している。なお、「長さ方向」及び「径方向」とは、コネクタハウジング又はリテーナ保持部の長さ方向・径方向を意味する。 In order to achieve this object, the quick connector of the present invention has a tube connecting part on one side in the length direction, a retainer holding part on the other side in the length direction, and an annular seal member on the inner peripheral surface. A connector housing in which a seal portion is formed; and a retainer that is inserted in a direction perpendicular to the retainer holding portion of the connector housing and held in a mounting position, and an annular engagement protrusion is formed on the outer peripheral surface. The pipe body thus inserted is relatively inserted into the pipe insertion hole of the connector housing or relatively to a predetermined position, and is connected in a retaining state by engagement of the annular engagement protrusion and the retainer. The retainer holding portion is formed with an engagement window that opens to the pipe insertion hole, and the retainer is in a state of being prevented from coming off from the annular engagement protrusion. A retaining portion formed so as to be engaged, and an engaging portion that engages with the engagement window to prevent the retainer from moving in the insertion direction and holds the retainer in the attachment position. The engagement portion enters the pipe insertion hole from the engagement window and protrudes to a position where it comes into contact with the annular engagement protrusion that relatively proceeds in the pipe insertion hole. The engagement portion is pushed by the annular engagement projection when the annular engagement projection reaches the retaining engagement position or a predetermined position, and is deformed, for example, to engage with the engagement window. When the retainer is pushed in the direction perpendicular to the axis after the engagement between the engagement portion and the engagement window is released, the retainer moves to the confirmation fixing position, and the retaining The part engages with the annular engagement protrusion in a retaining state. That. Since the retainer is prevented from moving in the insertion direction due to the engagement with the engagement window of the engagement portion, the retainer cannot be pushed in even if it is pushed. However, when the pipe body is properly inserted into the connector housing and the annular engagement protrusion of the pipe body reaches the retaining engagement position (position where it engages with the retaining section) or a predetermined position, the annular engagement of the pipe body. The engagement portion is deformed and moved outward, for example, by being pushed by the mating protrusion, and the engagement of the engagement portion with the engagement window is released. Then, the retainer can be further pushed in the direction perpendicular to the axis and moved to the confirmation fixing position. Then, the retainer is moved to the confirmation fixing position, and at the same time, it is confirmed that the pipe body is normally connected to the quick connector. If the retainer cannot be moved to the confirmation fixing position, the pipe body is not normally inserted into the quick connector. When the retainer is held at the attachment position, one radial side of the retainer protrudes from the outer periphery of the retainer holding portion. The “length direction” and “radial direction” mean the length direction and radial direction of the connector housing or the retainer holding portion.

係合部を弾性脚部の先端部に形成しておけば、係合部の係合窓との係合及び係合の解除をスムーズに行うことができる。 If the engaging part is formed at the tip of the elastic leg part, the engaging part can be smoothly engaged with and released from the engaging window.

リテーナの抜け止め部は、リテーナが確認固定位置まで移動したときに、環状係合突部の長さ方向他方側でこの環状係合突部に隣接して、パイプ体にスナップ的に嵌る一対のクランプアーム又はＣ形クランプとすることができる。ここでは、簡単な構成で効果的な抜け止め部を構成できる。あるいは、リテーナの抜け止め部は、リテーナが確認固定位置まで移動したときに、環状係合突部の長さ方向他方側でこの環状係合突部に隣接して、パイプ体の外周に内端面が接触する確認抜け止め部とすることができる。確認抜け止め部は、所定の位置に達していない環状係合突部と干渉し、リテーナが確認固定位置に押し込まれるのを阻止する。 When the retainer moves to the confirmation fixing position, the retainer retaining portion of the retainer is adjacent to the annular engagement protrusion on the other side in the length direction of the annular engagement protrusion and is snapped into the pipe body. It can be a clamp arm or a C-shaped clamp. Here, an effective retaining portion can be configured with a simple configuration. Alternatively, the retainer retaining portion of the retainer has an inner end surface on the outer periphery of the pipe body adjacent to the annular engagement protrusion on the other side in the length direction of the annular engagement protrusion when the retainer moves to the confirmation fixing position. It can be set as a confirmation retaining portion that contacts with each other. The confirmation retaining portion interferes with the annular engagement protrusion that has not reached the predetermined position, and prevents the retainer from being pushed into the confirmation fixing position.

リテーナが、確認固定位置では、リテーナ保持部の外周から突出しないように形成されていれば、接続確認がしやすいし、周辺機器との干渉も避けることができる。また、確認固定位置では、例えば、係合部がハウジング側と係合し、リテーナが確認固定位置から容易にずれないように構成されるが、弾性脚部を覆うカバー部を有していれば、弾性脚部に外力が作用し、その結果、係合部とハウジング側との係合が解除されるといったことが防止される。 If the retainer is formed so as not to protrude from the outer periphery of the retainer holding portion at the confirmation fixing position, it is easy to confirm the connection and avoid interference with peripheral devices. Further, in the confirmation fixing position, for example, the engaging portion is engaged with the housing side so that the retainer is not easily displaced from the confirmation fixing position. However, if the cover has a cover portion that covers the elastic leg portion. Thus, it is possible to prevent an external force from acting on the elastic leg portion, and as a result, the engagement between the engagement portion and the housing side is released.

また、本発明の配管接続構造は、流体移送用の配管接続構造であって、請求項1乃至６のいずれかに記載のクイックコネクタと、前記クイックコネクタの前記チューブ接続部に嵌め付けられたチューブと、前記クイックコネクタに接続されたパイプ体と、を備え、前記リテーナは、前記リテーナ保持部に、確認固定位置で保持されていて、前記パイプ体は、前記環状係合突部が前記リテーナの前記抜け止め部と係合して前記クイックコネクタに接続されている、といったものである。 The pipe connection structure of the present invention is a pipe connection structure for fluid transfer, and the quick connector according to any one of claims 1 to 6 and a tube fitted to the tube connection portion of the quick connector. And a pipe body connected to the quick connector, wherein the retainer is held by the retainer holding portion at a confirmation fixing position, and the pipe body has the annular engaging projection of the retainer. It is engaged with the retaining portion and connected to the quick connector.

本発明によれば、接続確認機能を併せ持ったリテーナを有するクイックコネクタ及びこのようなクイックコネクタを用いた流体移送用の配管接続構造を提供できる。 According to the present invention, it is possible to provide a quick connector having a retainer having a connection confirmation function and a pipe connection structure for fluid transfer using such a quick connector.

本発明に係る第１のクイックコネクタの分解斜視図である。It is a disassembled perspective view of the 1st quick connector which concerns on this invention. 第１のクイックコネクタのコネクタハウジングの断面図である。It is sectional drawing of the connector housing of a 1st quick connector. 第１のクイックコネクタのリテーナの斜視図である。It is a perspective view of the retainer of the 1st quick connector. リテーナが取り付けられた第１のクイックコネクタの斜視図である。It is a perspective view of the 1st quick connector with which the retainer was attached. リテーナが取り付けられた第１のクイックコネクタの断面図である。It is sectional drawing of the 1st quick connector with which the retainer was attached. リテーナが取り付けられた第１のクイックコネクタの別の断面図である。It is another sectional view of the 1st quick connector with which the retainer was attached. 第１のクイックコネクタをパイプ体に接続して本発明に係る第１の配管接続構造を構成する場合を説明するための図であり、パイプ体をコネクタハウジング内に正しく相対的に挿入した状態を示す図である。It is a figure for demonstrating the case where the 1st quick connector is connected to a pipe body and the 1st piping connection structure concerning the present invention is constituted, and the state where the pipe body was correctly inserted in the connector housing is shown. FIG. 第１のクイックコネクタをパイプ体に接続して本発明に係る第１の配管接続構造を構成する場合を説明するための図であり、リテーナとパイプ体の環状係合突部とが係合した状態（第１の配管接続構造）を示す図である。It is a figure for demonstrating the case where the 1st quick connector is connected to a pipe body and the 1st piping connection structure which concerns on this invention is comprised, and the retainer and the annular engagement protrusion of the pipe body engaged It is a figure which shows a state (1st piping connection structure). 第１の配管接続構造を示す斜視図である。It is a perspective view which shows a 1st piping connection structure. 本発明に係る第２のクイックコネクタの分解斜視図である。It is a disassembled perspective view of the 2nd quick connector which concerns on this invention. 第２のクイックコネクタのコネクタハウジングの断面図である。It is sectional drawing of the connector housing of a 2nd quick connector. 第２のクイックコネクタのリテーナの斜視図である。It is a perspective view of the retainer of the 2nd quick connector. リテーナが取り付けられた第２のクイックコネクタの斜視図である。It is a perspective view of the 2nd quick connector with which the retainer was attached. リテーナが取り付けられた第２のクイックコネクタの断面図である。It is sectional drawing of the 2nd quick connector with which the retainer was attached. リテーナが取り付けられた第２のクイックコネクタの別の断面図である。It is another sectional view of the 2nd quick connector with which the retainer was attached. 第２のクイックコネクタをパイプ体に接続して本発明に係る第２の配管接続構造を構成する場合を説明するための図であり、パイプ体をコネクタハウジング内に正しく相対的に挿入した状態を示す図である。It is a figure for demonstrating the case where the 2nd quick connector is connected to a pipe body and the 2nd piping connection structure concerning the present invention is constituted, and the state where the pipe body was correctly inserted in the connector housing is shown. FIG. 第２のクイックコネクタをパイプ体に接続して本発明に係る第２の配管接続構造を構成する場合を説明するための図であり、リテーナとパイプ体の環状係合突部とが係合した状態（第２の配管接続構造）を示す図である。It is a figure for demonstrating the case where the 2nd quick connector is connected to a pipe body, and comprises the 2nd piping connection structure which concerns on this invention, and the retainer and the annular engagement protrusion of the pipe body engaged It is a figure which shows a state (2nd piping connection structure). 第２の配管接続構造を示す斜視図である。It is a perspective view which shows the 2nd piping connection structure.

以下、本発明の実施の形態を図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１乃至図６を参照して本発明に係る第１のクイックコネクタを説明する。 A first quick connector according to the present invention will be described with reference to FIGS.

第１のクイックコネクタ１は、例えばガラス繊維強化ポリアミド製である筒状のコネクタハウジング３と、コネクタハウジング３の長さ方向他端部に径方向外側から差し込まれた、例えばポリアミド製であるリテーナ５と、を備えていて、自動車のガソリン燃料配管を構成するために用いられるものである。コネクタハウジング３は、長さ方向一方側がチューブ接続部７、そして長さ方向他方側がパイプ挿入部９として形成され、パイプ挿入部９の外径は、長さ方向一方側から長さ方向中間、そして長さ方向他方側まで順次段階的に大径となっている。すなわち、パイプ挿入部９は、長さ方向一方側から長さ方向中間、そして長さ方向他方側まで順次段階的に太くなっている。 The first quick connector 1 includes a cylindrical connector housing 3 made of, for example, glass fiber reinforced polyamide, and a retainer 5 made of, for example, polyamide inserted into the other longitudinal end of the connector housing 3 from the outside in the radial direction. And is used for constituting a gasoline fuel pipe of an automobile. The connector housing 3 is formed with a tube connecting portion 7 on one side in the length direction and a pipe insertion portion 9 on the other side in the length direction. The outer diameter of the pipe insertion portion 9 is intermediate in the length direction from one side in the length direction, and The diameter gradually increases stepwise to the other side in the length direction. That is, the pipe insertion part 9 is gradually thickened stepwise from one side in the length direction to the middle in the length direction and the other side in the length direction.

チューブ接続部７は、長さ方向一端側から順に、長さ方向他方側に向かって拡径する第１の断面台形状部１１、この第１の断面台形状部１１の長さ方向他方側の第１の小径部１３、この第１の小径部１３の長さ方向他方側のフランジ状部１５、このフランジ状部１５の長さ方向他方側の第2の小径部１７、この第２の小径部１７の長さ方向他方側の第２の断面台形状部１９及びこの第２の断面台形状部１９の長さ方向他方側の円筒状部２１を一体的に備えて形成され、内部をガソリン燃料流路（軸孔）２３が貫通していて、このガソリン燃料流路２３は、パイプ挿入部９の貫通孔（軸孔）２５に連通している。また、第１の小径部１３内にはゴム製の環状シール部材２７が嵌められている。そして、このような構成のチューブ接続部７の外周に、樹脂チューブ２９の長さ方向端部がきつく嵌め付けられて接続される（図９参照）。チューブ接続部７のフランジ状部１５の長さ方向他端外周縁及び第２の断面台形状部１９の長さ方向他端外周縁は、樹脂チューブ２９に食い込んで樹脂チューブ２９に対する抜け止めとして機能する。樹脂チューブ２９は、例えば、燃料不透過性のバリア層を備えた積層構造体として形成されていて、長さ方向端縁部を拡径しやすくするために、長さ方向端縁部の外層は切り取られている（図９の符号３１の個所参照）。 The tube connection portion 7 includes, in order from one end side in the length direction, a first cross-sectional trapezoidal portion 11 whose diameter increases toward the other side in the lengthwise direction, the lengthwise other side of the first cross-sectional trapezoidal portion 11. The first small diameter portion 13, the flange-shaped portion 15 on the other side in the length direction of the first small diameter portion 13, the second small diameter portion 17 on the other side in the length direction of the flange-shaped portion 15, the second small diameter The second cross-sectional trapezoidal portion 19 on the other side in the length direction of the portion 17 and the cylindrical portion 21 on the other side in the lengthwise direction of the second cross-sectional trapezoidal portion 19 are integrally formed, and the inside is formed of gasoline. A fuel flow path (shaft hole) 23 passes therethrough, and the gasoline fuel flow path 23 communicates with a through hole (shaft hole) 25 of the pipe insertion portion 9. A rubber annular seal member 27 is fitted in the first small diameter portion 13. And the length direction edge part of the resin tube 29 is tightly fitted and connected to the outer periphery of the tube connection part 7 of such a structure (refer FIG. 9). The outer peripheral edge at the other end in the length direction of the flange-shaped portion 15 of the tube connecting portion 7 and the outer peripheral edge at the other end in the length direction of the second cross-sectional trapezoidal portion 19 function as a retaining for the resin tube 29 by biting into the resin tube 29 To do. The resin tube 29 is formed, for example, as a laminated structure including a fuel-impermeable barrier layer, and the outer layer of the lengthwise edge is formed in order to make it easier to expand the lengthwise edge. It has been cut out (see the location of reference numeral 31 in FIG. 9).

パイプ挿入部９の長さ方向一方側は、パイプ体３３の外径とほぼ等しい内径を有するように形成されていて、パイプ挿入部９の貫通孔２５の長さ方向一方側は、パイプ挿入部９内に挿入されたパイプ体３３の先端部を受け入れてガタがないように支持するパイプ支持部３５を構成している。また、パイプ挿入部９の長さ方向中間は、パイプ体３３よりも大径の内径を有するように形成され、例えばフッ素ゴム製の一対の環状シールリング３７を収容していて、パイプ挿入部９の貫通孔２５の長さ方向中間は、環状シールリング３７を備えてシール部３９を構成している。一対の環状シールリング３７の間には、樹脂製のカラー４１が配置されている。そして、パイプ挿入部９の内側の長さ方向中間と長さ方向他方側との境界位置、すなわち、パイプ挿入部９の貫通孔２５の長さ方向中間と長さ方向他方側との境界位置には、樹脂製のブッシュ４３が嵌め付けられていて、このブッシュ４３の内径は、貫通孔２５のパイプ支持部３５の径と同一又はほぼ同一に設定されているが、ブッシュ４３の内周の長さ方向他端部は、パイプ体３３を挿入しやすくするために、長さ方向他方側に向かって拡径するように形成されている。 One side in the length direction of the pipe insertion portion 9 is formed to have an inner diameter substantially equal to the outer diameter of the pipe body 33, and one side in the length direction of the through hole 25 of the pipe insertion portion 9 is the pipe insertion portion. The pipe support part 35 which receives the front-end | tip part of the pipe body 33 inserted in 9 and supports so that there is no backlash is comprised. Further, the middle in the length direction of the pipe insertion portion 9 is formed so as to have an inner diameter larger than that of the pipe body 33, and accommodates a pair of annular seal rings 37 made of, for example, fluoro rubber. An intermediate portion of the through hole 25 in the longitudinal direction is provided with an annular seal ring 37 to constitute a seal portion 39. A resin collar 41 is disposed between the pair of annular seal rings 37. And, at the boundary position between the length direction middle inside the pipe insertion portion 9 and the other length direction side, that is, the boundary position between the length direction middle of the through hole 25 of the pipe insertion portion 9 and the other length direction side. The bush 43 made of resin is fitted, and the inner diameter of the bush 43 is set to be the same as or substantially the same as the diameter of the pipe support portion 35 of the through-hole 25. The other end in the length direction is formed so as to increase in diameter toward the other side in the length direction in order to facilitate insertion of the pipe body 33.

パイプ挿入部９の長さ方向他方側はリテーナ保持部４５を構成している。リテーナ保持部４５は、長方形の径方向一方側の辺を径方向一方側に向けて円弧状に膨らむように湾曲させたような断面形状を有していて、長さ方向他端開口４７から、コネクタハウジング３又はパイプ挿入部９の内側の貫通孔２５内にパイプ体３３を挿入できるように形成されている。リテーナ保持部４５の貫通孔２５は、パイプ体３３の環状係合突部４９よりも大径又は若干大径に形成されてパイプ抜け止め孔５１を構成しているが、パイプ抜け止め孔５１の長さ方向一方側にはブッシュ４３が嵌め付けられていて、リテーナ保持部４５のこのブッシュ４３よりも長さ方向他方側には、リテーナ５を差し込むためのリテーナ取り付け部５３が形成されている。 The other side in the length direction of the pipe insertion portion 9 constitutes a retainer holding portion 45. The retainer holding part 45 has a cross-sectional shape that is curved so as to swell in a circular arc shape with one side in the radial direction of the rectangle directed toward the one side in the radial direction, and from the other end opening 47 in the length direction, The pipe body 33 is formed so as to be inserted into the through hole 25 inside the connector housing 3 or the pipe insertion portion 9. The through hole 25 of the retainer holding portion 45 is formed with a diameter larger or slightly larger than the annular engagement protrusion 49 of the pipe body 33 to constitute the pipe retaining hole 51. A bush 43 is fitted on one side in the length direction, and a retainer mounting portion 53 for inserting the retainer 5 is formed on the other side in the length direction than the bush 43 of the retainer holding portion 45.

リテーナ取り付け部５３では、径方向一方側に、円弧状に湾曲したリテーナ保持部４５の径方向一方側の外面（円弧状外面）５５に沿って円弧状に湾曲する嵌め込み凹部５７が形成され、この嵌め込み凹部５７の両側からはそれぞれ、径方向他方側に開口する脚部収容孔５９が延びていて、嵌め込み凹部５７の幅方向中間部からは、パイプ抜け止め孔５１に開口する第１の通過孔６１が延びている。また、リテーナ保持部４５（リテーナ取り付け部５３）の円弧状外面５５からは、嵌め込み凹部５７の長さ方向他方側で、この嵌め込み凹部５７及び第１の通過孔６１に連続するように、長方形状の第２の通過孔６３がパイプ抜け止め孔５１に開口するように延びていて、この第２の通過孔６３の幅は、第１の通過孔６１の幅よりも狭く又は若干狭く形成されている。 In the retainer mounting portion 53, a fitting concave portion 57 that is curved in an arc shape is formed on the radially one side of the retainer holding portion 45 that is curved in an arc shape along an outer surface (arc-shaped outer surface) 55 of the radial direction. A leg housing hole 59 that opens to the other radial side extends from both sides of the fitting recess 57, and a first passage hole that opens to the pipe retaining hole 51 from the intermediate portion in the width direction of the fitting recess 57. 61 extends. Further, from the arcuate outer surface 55 of the retainer holding portion 45 (retainer mounting portion 53), on the other side in the lengthwise direction of the fitting recess 57, a rectangular shape is formed so as to be continuous with the fitting recess 57 and the first passage hole 61. The second passage hole 63 extends so as to open to the pipe retaining hole 51, and the width of the second passage hole 63 is narrower or slightly narrower than the width of the first passage hole 61. Yes.

リテーナ取り付け部５３では、嵌め込み凹部５７及び脚部収容孔５９の内側で、ガイド−固定構造が形成されている。ガイド−固定構造は、嵌め込み凹部５７及び脚部収容孔５９の境界位置に形成された、一対のガイド−ストッパ部６５と、一対のガイド−ストッパ部６５の径方向他方側に形成されたストッパ−固定部６７と、を有している。それぞれのガイド−ストッパ部６５とストッパ−固定部６７との間には、パイプ抜け止め孔５１内に臨む係合窓６９が設けられている。ガイド−ストッパ部６５は、内面７１がパイプ抜け止め孔５１の一部を構成し、外面７３が内面７１と同心的に形成されて湾曲するとともに、内側の側面７５及び外側の側面７７が、リテーナ５の差込方向に延びるように形成されていて、外面７３及び外側の側面７７がガイド面を構成し、外側の側面７７と内面７１との断面鋭角の尖った境界部分が引き抜き防止部（係合窓）７９を構成している。 In the retainer mounting portion 53, a guide-fixing structure is formed inside the fitting recess 57 and the leg housing hole 59. The guide-fixing structure includes a pair of guide-stopper portions 65 formed at the boundary position between the fitting recess 57 and the leg receiving hole 59, and a stopper formed on the other radial side of the pair of guide-stopper portions 65. And a fixing portion 67. Between each guide-stopper portion 65 and the stopper-fixing portion 67, an engagement window 69 that faces the pipe retaining hole 51 is provided. The guide-stopper portion 65 has an inner surface 71 constituting a part of the pipe retaining hole 51, an outer surface 73 formed concentrically with the inner surface 71 and curved, and an inner side surface 75 and an outer side surface 77 having a retainer. 5, the outer surface 73 and the outer side surface 77 constitute a guide surface, and the boundary portion having a sharp cross section between the outer side surface 77 and the inner surface 71 is a pull-out preventing portion (engagement member). 79).

ストッパ−固定部６７は、連結支持部８１と、この連結支持部８１の径方向一方側に設けられた係合部分８３と、を一体的に備えていて、係合部分８３は、連結支持部８１の両側に突出する突出部８５を有している。係合部分８３の内面８７は、パイプ抜け止め孔５１の一部を構成し、突出部８５の外面８９はそれぞれ、内面８７と同心的に形成されて湾曲するが、外面８９の外側部（幅方向外側部）では大径に、外面８９の内側部（幅方向内側部）では小径に形成されて、内側部と外側部との間に固定段部９１を有していて、突出部８５の側面９３は、リテーナ５の差込方向に延びるように形成されている。突出部８５の側面９３はガイド面を構成し、側面９３と内面８７との断面鋭角の尖った境界部分は、係合窓６９を形成するように、ガイド−ストッパ部６５の抜け止め部７９と間隔を有して向かい合い、ストッパ部（係合窓）９５を構成している。 The stopper-fixing portion 67 is integrally provided with a connection support portion 81 and an engagement portion 83 provided on one side of the connection support portion 81 in the radial direction. 81 has projecting portions 85 projecting on both sides. The inner surface 87 of the engaging portion 83 constitutes a part of the pipe retaining hole 51, and the outer surfaces 89 of the protrusions 85 are respectively formed concentrically with the inner surface 87 and are curved. The outer side 89 is formed with a large diameter, and the inner side of the outer surface 89 (the inner side in the width direction) is formed with a small diameter, and has a fixed step 91 between the inner side and the outer side. The side surface 93 is formed to extend in the insertion direction of the retainer 5. The side surface 93 of the projecting portion 85 constitutes a guide surface, and the boundary portion having a sharp cross section between the side surface 93 and the inner surface 87 forms an engagement window 69 with the retaining portion 79 of the guide-stopper portion 65. A stopper portion (engagement window) 95 is configured to face each other with a gap.

リテーナ５は、連結部９７と、この連結部９７の両端部にそれぞれ設けられた一対の弾性脚部９９と、を備え、連結部９７の内面の幅方向中間部かつ長さ方向他方側からは、確認抜け止め部１０１が径方向内側（径方向他方側）に延びていて、この確認抜け止め部１０１の内端面１０３は、パイプ体３３の外周面と同一の曲率半径で湾曲している。確認抜け止め部１０１の内端部では、両側面にそれぞれ、パイプ体３３の外周面を挟み付けることができるように、一対のクランプアーム１０５が設けられている。なお、連結部９７の長さ方向他方側には、外面が連結部９７の外面と同一の曲率半径で湾曲してこの連結部９７の外面と連なり、確認抜け止め部１０１と同一の幅で径方向内側に延び、確認抜け止め部１０１と一体化される確認突出部１０７が形成されていて、確認突出部１０７の内端面１０８は、パイプ体３３の外周面と同一の曲率半径で湾曲して確認抜け止め部１０１の内端面１０３を長さ方向他方側に延長している。 The retainer 5 includes a connecting portion 97 and a pair of elastic legs 99 provided at both ends of the connecting portion 97, respectively, from the width direction intermediate portion and the lengthwise other side of the inner surface of the connecting portion 97. The confirmation retaining portion 101 extends radially inward (the other radial direction side), and the inner end surface 103 of the confirmation retaining portion 101 is curved with the same radius of curvature as the outer peripheral surface of the pipe body 33. A pair of clamp arms 105 are provided at the inner end portion of the confirmation retaining portion 101 so that the outer peripheral surface of the pipe body 33 can be sandwiched between both side surfaces. On the other side in the length direction of the connecting portion 97, the outer surface is curved with the same radius of curvature as the outer surface of the connecting portion 97 and is connected to the outer surface of the connecting portion 97. A confirmation protrusion 107 is formed which extends inward in the direction and is integrated with the confirmation retaining portion 101, and the inner end surface 108 of the confirmation protrusion 107 is curved with the same radius of curvature as the outer peripheral surface of the pipe body 33. The inner end face 103 of the confirmation retaining part 101 is extended to the other side in the length direction.

リテーナ５の弾性脚部９９は、連結部９７の両端部から互いに平行に延びる本体部１０９と、この本体部１０９の先端部に、内側に突出するように設けられた係合部１１１と、から一体的に形成されている。本体部１０９の内面は、本体部１０９の延びる方向（リテーナ５の差込方向）に延びているが、係合部１１１の内面は、径方向他方側に向かって内側に傾斜して延びる傾斜面１１３と、この傾斜面１１３の内端から、幅方向内側に向かって突出する係合面１１５と、を有している。係合部１１１の底面１１７は、内側に向かって径方向一方側に湾曲して延びる湾曲面となっているが、係合部１１１の底面１１７と外面１１８との境界位置には係合凹部１１９が形成されている。なお、係合部１１１の長さ方向他方側面は、内側に向かって長さ方向一方側に傾斜している。 The elastic leg 99 of the retainer 5 includes a main body 109 extending in parallel with each other from both ends of the connecting portion 97, and an engaging portion 111 provided at the front end of the main body 109 so as to protrude inward. It is integrally formed. The inner surface of the main body 109 extends in the direction in which the main body 109 extends (the direction in which the retainer 5 is inserted), but the inner surface of the engagement portion 111 extends inwardly toward the other side in the radial direction. 113 and an engagement surface 115 protruding inward in the width direction from the inner end of the inclined surface 113. The bottom surface 117 of the engaging portion 111 is a curved surface that extends inwardly in the radial direction toward the inside, but the engaging recess 119 is located at the boundary position between the bottom surface 117 and the outer surface 118 of the engaging portion 111. Is formed. The other side surface in the length direction of the engaging portion 111 is inclined toward one side in the length direction toward the inside.

このような形状のリテーナ５を、リテーナ取り付け部５３に取り付けるには、係合部１１１側から、リテーナ５を嵌め込み凹部５７内に差し込む。そうすると、係合部１１１の底面１１７が、ガイド−ストッパ部６５の外面７３にそれぞれ当接する。この状態で、さらにリテーナ５を押し込むと、係合部１１１がガイド−ストッパ部６５の外面７３上を、弾性脚部９９を開くように変形させながら、外側にスライドする。そして、係合部１１１は、ガイド−ストッパ部６５の外面７３から外れ、ガイド−ストッパ部６５の外側の側面７７に沿って径方向他方側にスライドする。係合部１１１がガイド−ストッパ部６５の外側の側面７７から外れると、弾性脚部９９の弾性復帰力により弾性脚部９９が平行状態に戻って、係合部１１１は係合窓６９内に入り込む（図６参照）。平行状態である弾性脚部９９の本体部１０９の内面同士の間隔は、ガイド−ストッパ部６５の外側の側面７７同士の間隔とほぼ同一であり、本体部１０９は、例えば、ガイド−ストッパ部６５を弱く挟み付ける。また、ここでは、クランプアーム１０５は第１の通過孔６１内に入り込んでいる。第１の通過孔６１は、一対のクランプアーム１０５の幅（最も広い幅）とほぼ等しい幅を有している。図６に示すリテーナ５の取り付け位置での取り付け状態（取り付け位置では、リテーナ５の連結部９７側がリテーナ保持部４５から突出している）では、係合部１１１の係合凹部１１９がストッパ−固定部６７のストッパ部９５に係合し、それ以上、リテーナ５を押し込めないようになっている。係合凹部１１９は幅方向外側にずれないようにストッパ部９５と係合している。また、リテーナ５を引っ張っても、係合部１１１の係合面１１５がガイド−ストッパ部６５の抜け止め部７９に係合するので、リテーナ５を引き抜くことはできない。ここでは、係合部１１１の内端は、パイプ体３３を通過させることができるように位置しているが、係合部１１１の間隔は、パイプ体３３の環状係合突部４９の外径よりも狭い。また、係合部１１１の内端面１２０は、係合窓６９の長さ方向一端部に位置しているので、確認抜け止め部１０１よりも長さ方向一方側に位置している。 In order to attach the retainer 5 having such a shape to the retainer attaching portion 53, the retainer 5 is fitted into the recessed portion 57 from the engaging portion 111 side. Then, the bottom surface 117 of the engaging portion 111 comes into contact with the outer surface 73 of the guide-stopper portion 65. When the retainer 5 is further pushed in this state, the engaging portion 111 slides outward on the outer surface 73 of the guide-stopper portion 65 while deforming the elastic leg portion 99 to open. Then, the engaging portion 111 is disengaged from the outer surface 73 of the guide-stopper portion 65 and slides to the other side in the radial direction along the outer side surface 77 of the guide-stopper portion 65. When the engaging portion 111 is disengaged from the outer side surface 77 of the guide-stopper portion 65, the elastic leg portion 99 returns to the parallel state by the elastic restoring force of the elastic leg portion 99, and the engaging portion 111 enters the engaging window 69. Enter (see FIG. 6). The interval between the inner surfaces of the main body 109 of the elastic leg 99 in the parallel state is substantially the same as the interval between the outer side surfaces 77 of the guide-stopper portion 65, and the main body 109 is, for example, the guide-stopper portion 65. Pinch weakly. Further, here, the clamp arm 105 enters the first passage hole 61. The first passage hole 61 has a width substantially equal to the width (widest width) of the pair of clamp arms 105. In the attachment state at the attachment position of the retainer 5 shown in FIG. 6 (the connection portion 97 side of the retainer 5 protrudes from the retainer holding portion 45 at the attachment position), the engagement recess 119 of the engagement portion 111 is the stopper-fixing portion. The retainer 5 is engaged with the stopper portion 95 of the 67 and cannot be pushed any further. The engaging recess 119 is engaged with the stopper portion 95 so as not to be displaced outward in the width direction. Further, even when the retainer 5 is pulled, the engaging surface 115 of the engaging portion 111 engages with the retaining portion 79 of the guide-stopper portion 65, so that the retainer 5 cannot be pulled out. Here, the inner end of the engaging portion 111 is positioned so that the pipe body 33 can pass through, but the interval between the engaging portions 111 is the outer diameter of the annular engaging protrusion 49 of the pipe body 33. Narrower than. Further, since the inner end surface 120 of the engaging portion 111 is located at one end portion in the length direction of the engaging window 69, it is located on the one side in the length direction from the confirmation retaining portion 101.

図７及び図８はリテーナ５の操作態様を説明するための図である。 7 and 8 are views for explaining the operation mode of the retainer 5.

パイプ体３３は、環状係合突部４９が確認抜け止め部１０１を通過するまで、すなわち、環状係合突部４９が確認抜け止め部１０１とブッシュ４３との間に位置するまで（この位置が抜け止め係合位置又は所定の位置）、リテーナ５が取り付けられたコネクタハウジング３内に挿入される（図５の仮想線で示すパイプ体３３参照）。パイプ体３３の環状係合突部４９は、リテーナ取り付け部５３に差し掛かると、リテーナ５の係合部１１１の長さ方向他方側面に当接し、係合部１１１を外側に押圧する。そして、環状係合突部４９が確認抜け止め部１０1を通過し、抜け止め係合位置に達すると、係合部１１１は、係合凹部１１９がストッパ−固定部６７のストッパ部９５から外れるように、外側に移動する（図７参照）。ここでは、係合部１１１は、内端面１２０が環状係合突部４９に載るように当接し、突出部８５の側面９３と同一又はほぼ同一の幅方向位置となるように、幅方向外側にずれた状態となる。そうすると、リテーナ５をさらに押し込むことができるが、リテーナ５をさらに押し込むと、リテーナ５の係合部１１１は、ストッパ−固定部６７の突出部８５の側面９３に案内されて径方向他方側に移動する。そして、連結部９７の内面が、ガイド−ストッパ部６５の外面７３に当接するまで、リテーナ４５を押し込むことができるが、係合部１１１は、突出部８５の側面９３から外れると、弾性脚部９９の弾性復帰力により、係合面１１５が突出部８５の固定段部９１と係合するまで、幅方向内側に移動する（図８）。なお、突出部８５の側面９３は、ガイド−ストッパ部６５の外側の側面７７よりも若干内側に位置しているが、側面９３と側面７７を同一の幅方向位置としておくこともできる。この確認固定状態では、リテーナ５の連結部９７及び確認突出部１０７は、嵌め込み凹部５７及び第２の通過孔６３内に入り込みに、連結部９７及び確認突出部１０７の外面が、リテーナ保持部４５の外面５５に沿って位置することとなる。また、係合部１１１の係合面１１５が突出部８５の固定段部９１と係合しているので、リテーナ５の抜き取り方向への移動が規制される。そして、確認抜け止め部１０１が、第１の通過孔６１を通過し、内端面１０３をパイプ体３３の外周面に接触させた状態で、環状係合突部４９の長さ方向他方側に位置し、環状係合突部４９と係合しているので、かつ、クランプアーム１０５が、環状係合突部４９の長さ方向他方側に位置し、パイプ体３３の外周を挟み付け、環状係合突部４９と係合しているので、第１のクイックコネクタ１はパイプ体３３に抜け止め状態で接続されて第１の配管接続構造を構成することとなる（図９参照）。 The pipe body 33 is used until the annular engagement protrusion 49 passes through the confirmation retaining portion 101, that is, until the annular engagement projection 49 is located between the confirmation retaining portion 101 and the bush 43 (this position is The retaining engagement position or a predetermined position) is inserted into the connector housing 3 to which the retainer 5 is attached (see the pipe body 33 indicated by the phantom line in FIG. 5). When the annular engagement protrusion 49 of the pipe body 33 reaches the retainer mounting portion 53, the annular engagement protrusion 49 comes into contact with the other side surface in the length direction of the engagement portion 111 of the retainer 5 and presses the engagement portion 111 outward. When the annular engagement protrusion 49 passes through the check retaining portion 101 and reaches the retaining engagement position, the engaging portion 111 is configured such that the engaging recess 119 is disengaged from the stopper portion 95 of the stopper-fixing portion 67. Then, it moves outward (see FIG. 7). Here, the engaging portion 111 abuts so that the inner end surface 120 is placed on the annular engaging protrusion 49, and is located outward in the width direction so as to have the same or substantially the same width direction position as the side surface 93 of the protrusion 85. It will be in a shifted state. Then, the retainer 5 can be further pushed in. However, when the retainer 5 is further pushed in, the engaging portion 111 of the retainer 5 is guided to the side surface 93 of the protruding portion 85 of the stopper-fixing portion 67 and moves to the other side in the radial direction. To do. Then, the retainer 45 can be pushed in until the inner surface of the connecting portion 97 contacts the outer surface 73 of the guide-stopper portion 65, but when the engaging portion 111 comes off from the side surface 93 of the protruding portion 85, the elastic leg portion Due to the elastic return force 99, the engagement surface 115 moves inward in the width direction until it engages with the fixed step 91 of the protrusion 85 (FIG. 8). The side surface 93 of the protruding portion 85 is located slightly inside the outer side surface 77 of the guide-stopper portion 65, but the side surface 93 and the side surface 77 can be set to the same width direction position. In this confirmation fixed state, the connecting portion 97 and the confirmation protrusion 107 of the retainer 5 enter the fitting recess 57 and the second passage hole 63, and the outer surfaces of the connection portion 97 and the confirmation protrusion 107 are the retainer holding portion 45. It will be located along the outer surface 55 of this. Further, since the engaging surface 115 of the engaging portion 111 is engaged with the fixed step portion 91 of the protruding portion 85, the movement of the retainer 5 in the extraction direction is restricted. Then, the confirmation retaining portion 101 passes through the first passage hole 61 and is positioned on the other side in the longitudinal direction of the annular engagement protrusion 49 in a state where the inner end surface 103 is in contact with the outer peripheral surface of the pipe body 33. The clamp arm 105 is located on the other side in the lengthwise direction of the annular engagement protrusion 49 and sandwiches the outer periphery of the pipe body 33, thereby engaging the annular engagement protrusion 49. Since it is engaged with the mating protrusion 49, the first quick connector 1 is connected to the pipe body 33 in a retaining state to constitute the first pipe connection structure (see FIG. 9).

ここで、パイプ体３３が正常に第１のクイックコネクタ１に挿入されていないと、係合部１１１の係合凹部１１９がストッパ−固定部６７のストッパ部９５から外れない。また、確認抜け止め部１０１又は確認突出部１０７がパイプ体３３の環状係合突部４９と干渉する。したがって、リテーナ５を確認固定状態となるように押し込むことはできない。 Here, if the pipe body 33 is not normally inserted into the first quick connector 1, the engaging recess 119 of the engaging portion 111 cannot be removed from the stopper portion 95 of the stopper-fixing portion 67. Further, the confirmation retaining portion 101 or the confirmation protrusion 107 interferes with the annular engagement protrusion 49 of the pipe body 33. Therefore, the retainer 5 cannot be pushed into the confirmation fixed state.

図１０乃至図１５を参照して本発明に係る第２のクイックコネクタを説明する A second quick connector according to the present invention will be described with reference to FIGS.

第２のクイックコネクタ１２１は、第１のクイックコネクタ１のリテーナ保持部４５及びリテーナ５の形状を変更したものであり、その他の構成は第１のクイックコネクタ１と同一であるので、概略的には、同一である部分は第１のクイックコネクタ１と同一の符号を付して説明を省略する。 The second quick connector 121 is obtained by changing the shapes of the retainer holding portion 45 and the retainer 5 of the first quick connector 1, and other configurations are the same as those of the first quick connector 1. The same parts are denoted by the same reference numerals as those of the first quick connector 1 and description thereof is omitted.

パイプ挿入部１２３（パイプ挿入部９とリテーナ保持部の形状が異なる）の長さ方向他方側のリテーナ保持部１２５は、長方形又は正方形の径方向一方側の辺を径方向一方側に向けて膨らむように円弧状に湾曲させ、径方向他端部の両側に長方形状の突出部を形成したような断面形状を有していて、長さ方向他端開口１２７から、コネクタハウジング３又はパイプ挿入部１２３の内側の貫通孔１２９（貫通孔２５とリテーナ保持部個所の形状が異なる）内にパイプ体３３を挿入できるように形成されている。リテーナ保持部１２５の貫通孔１２９は、パイプ体３３の環状係合突部４９よりも大径又は若干大径に形成されてパイプ抜け止め孔１３１を構成しているが、パイプ抜け止め孔１３１の長さ方向一方側にはブッシュ４３が嵌め付けられていて、リテーナ保持部１２５のこのブッシュ４３よりも長さ方向他方側には、リテーナ１３３を差し込むためのリテーナ取り付け部１３５が形成されている。 The retainer holding portion 125 on the other side in the length direction of the pipe insertion portion 123 (the shape of the pipe insertion portion 9 and the retainer holding portion is different) swells with one side of the rectangular or square radial direction facing the one side in the radial direction. And having a cross-sectional shape such that a rectangular protrusion is formed on both sides of the other end portion in the radial direction, from the other end opening 127 in the length direction, the connector housing 3 or the pipe insertion portion The pipe body 33 is formed so that it can be inserted into the through-hole 129 inside 123 (the shape of the through-hole 25 and the retainer holding portion is different). The through hole 129 of the retainer holding portion 125 is formed to have a diameter larger than or slightly larger than the annular engagement protrusion 49 of the pipe body 33 to form the pipe retaining hole 131. A bush 43 is fitted on one side in the length direction, and a retainer mounting portion 135 for inserting the retainer 133 is formed on the other side in the length direction of the retainer holding portion 125 from the bush 43.

リテーナ取り付け部１３５では、径方向一方側に、円弧状に湾曲したリテーナ保持部１２５の径方向一方側の外面（円弧状外面）１３７に沿って円弧状に湾曲する嵌め込み凹部１３９が形成され、この嵌め込み凹部１３９の両側からはそれぞれ、脚部収容凹部１４１が延びていて、この脚部収容凹部１４１の径方向他端からは、リテーナ保持部１２５の径方向他端部を貫通する脚部収容孔１４３が延びている。脚部収容凹部１４１と脚部収容孔１４３とは脚部収容部を形成する。嵌め込み凹部１３９の幅方向中間部からは、パイプ抜け止め孔１３１に開口する第１の通過孔１４５が延びている。また、リテーナ保持部１２５（リテーナ取り付け部１３５）の円弧状外面１３７からは、嵌め込み凹部１３９の長さ方向他方側で、この嵌め込み凹部１３９及び第１の通過孔１４５に連続するように、長方形状の第２の通過孔１４７がパイプ抜け止め孔１３１に開口するように延びていて、この第2の通過孔１４７の幅は、第１の通過孔１４５の幅よりも狭く又は若干狭く形成されている。 In the retainer mounting portion 135, a fitting recess 139 that is curved in an arc shape along the outer surface (arc-shaped outer surface) 137 on the radial direction one side of the retainer holding portion 125 that is curved in an arc shape is formed on one side in the radial direction. A leg receiving recess 141 extends from both sides of the fitting recess 139, and a leg receiving hole that penetrates the other radial end of the retainer holding portion 125 from the other radial end of the leg receiving recess 141. 143 extends. The leg accommodating recess 141 and the leg accommodating hole 143 form a leg accommodating portion. A first passage hole 145 that opens to the pipe retaining hole 131 extends from the intermediate portion in the width direction of the fitting recess 139. Further, from the arc-shaped outer surface 137 of the retainer holding portion 125 (retainer mounting portion 135), a rectangular shape is formed so as to be continuous with the fitting recess 139 and the first passage hole 145 on the other side in the length direction of the fitting recess 139. The second passage hole 147 extends so as to open to the pipe retaining hole 131, and the width of the second passage hole 147 is narrower or slightly narrower than the width of the first passage hole 145. Yes.

リテーナ取り付け部１３５では、嵌め込み凹部１３９及び脚部収容部の内側で、ガイド−固定構造が形成されている。ガイド−固定構造は、嵌め込み凹部１３９及び脚部収容凹部１４１の境界位置に形成された、一対のガイド−ストッパ部１４９と、一対のガイド−ストッパ部１４９の径方向他方側に形成されたストッパ−固定部１５１と、を有している。それぞれのガイド−ストッパ部１４９とストッパ−固定部１５１との間には、パイプ抜け止め孔１３１内に臨む係合窓１５３が設けられている。ガイド−ストッパ部１４９は、内面１５５がパイプ抜け止め孔１３１の一部を構成し、外面１５７が内面１５５と同心的に形成されて湾曲するとともに、内側の側面１５９及び外側の側面１６１が、リテーナ１３３の差込方向に延びるように形成されていて、外面１５７及び外側の側面１６１がガイド面を構成し、外側の側面１６１と内面１５５との断面鋭角の尖った境界部分が引き抜き防止部１６３を構成している。 In the retainer mounting portion 135, a guide-fixing structure is formed inside the fitting recess 139 and the leg housing portion. The guide-fixing structure includes a pair of guide-stopper portions 149 formed at the boundary position between the fitting recess 139 and the leg-receiving recess 141, and a stopper formed on the other radial side of the pair of guide-stopper portions 149. A fixing portion 151. Between each guide-stopper portion 149 and the stopper-fixing portion 151, an engagement window 153 that faces the pipe retaining hole 131 is provided. In the guide-stopper portion 149, the inner surface 155 forms a part of the pipe retaining hole 131, the outer surface 157 is formed concentrically with the inner surface 155, and the inner side surface 159 and the outer side surface 161 are retained by the retainer. The outer surface 157 and the outer side surface 161 constitute a guide surface, and the sharp boundary portion between the outer side surface 161 and the inner surface 155 forms the pull-out preventing portion 163. It is composed.

ストッパ−固定部１５１は、連結支持部１６５と、この連結支持部１６５の径方向一方側に設けられた係合部分１６７と、を一体的に備えていて、係合部分１６７は、連結支持部１６５の両側に突出する突出部１６９を有している。係合部分１６７の内面１７１は、パイプ抜け止め孔１３１の一部を構成し、突出部１６９の外面１７３はそれぞれ、幅方向外側に、幅方向外側に向かって径方向他方側に若干傾斜する固定部１７５を有していて、突出部１６９の側面１７７は、リテーナ１３３の差込方向に延びるように形成されている。突出部１６９の側面１７７はガイド面を構成し、側面１７７と内面１７１との断面鋭角の尖った境界部分は、係合窓１５３を形成するように、ガイド−ストッパ部１４９の抜け止め部１６３と間隔を有して向かい合い、ストッパ部（係合窓）１７９を構成している。 The stopper-fixing portion 151 is integrally provided with a connection support portion 165 and an engagement portion 167 provided on one side of the connection support portion 165 in the radial direction. The engagement portion 167 is a connection support portion. 165 has projecting portions 169 projecting on both sides of 165. The inner surface 171 of the engaging portion 167 constitutes a part of the pipe retaining hole 131, and the outer surface 173 of the protruding portion 169 is fixed to be slightly inclined outward in the width direction and slightly radially outward toward the outer side in the width direction. The side surface 177 of the protrusion 169 is formed to extend in the insertion direction of the retainer 133. The side surface 177 of the projecting portion 169 constitutes a guide surface, and the boundary portion having a sharp cross section between the side surface 177 and the inner surface 171 forms an engagement window 153 with the retaining portion 163 of the guide-stopper portion 149. A stopper portion (engagement window) 179 is formed to face each other with a gap.

リテーナ１３３は、カバー部１８３と、このカバー部１８３の内面の幅方向中間から径方向他方側に突出して延びる確認抜け止め部１８５と、この確認抜け止め部１８５の両側で、カバー部１８３の内面から径方向他方側に延びる一対の弾性脚部１８７と、を備え、カバー部１８３は、リテーナ保持部１２５の円弧状に湾曲する外面１３７に被さるように湾曲した湾曲部１８８と、リテーナ保持部１２５の径方向一方側の側面に被さるように、この湾曲部１８８の両端部から径方向他方側に延びる側部１８９と、を一体的に有している。弾性脚部１８７は、長さ方向一端がカバー部１８３の長さ方向一端とほぼ一致するようにして（長さ方向一端がカバー部８３の長さ方向一端よりも若干長さ方向他方側に位置するようにして）形成されているが、確認抜け止め部１８５は、長さ方向一端がカバー部１８３の長さ方向一端よりも長さ方向他方側に位置するように形成されている。また、カバー部１８３の内面には、それぞれの弾性脚部１８７の付け根部と確認抜け止め部１８５との間で、嵌め込み突条１９１が設けられている（嵌め込み突条１９１は、確認抜け止め部８５の長さ方向一方側では、弾性脚部１８７の一方の付け根部から他方の付け根部に至るまで形成されている）。確認抜け止め部１８５の内端面１９３は、パイプ体３３の外周面と同一の曲率半径で湾曲し、また、確認抜け止め部１８５の内端部では、両側面にそれぞれ、パイプ体３３の外周面を挟み付けることができるように、長さ方向一端部で、一対のクランプアーム１９５が設けられている。 The retainer 133 includes a cover part 183, a check retaining part 185 extending from the middle of the inner surface of the cover part 183 in the radial direction to the other side in the radial direction, and an inner surface of the cover part 183 on both sides of the confirmation retaining part 185. A pair of elastic legs 187 extending in the radial direction to the other side, and the cover portion 183 is curved so as to cover the outer surface 137 of the retainer holding portion 125 that is curved in an arc shape, and the retainer holding portion 125. A side portion 189 that extends from both ends of the curved portion 188 to the other side in the radial direction is integrally provided so as to cover the side surface on the one radial direction side. The elastic leg portion 187 has one end in the length direction substantially coincident with one end in the length direction of the cover portion 183 (one end in the length direction is located slightly on the other side in the length direction than one end in the length direction of the cover portion 83). However, the confirmation retaining portion 185 is formed such that one end in the length direction is located on the other side in the length direction with respect to one end in the length direction of the cover portion 183. Further, on the inner surface of the cover portion 183, a fitting protrusion 191 is provided between the base portion of each elastic leg 187 and the confirmation retaining portion 185 (the fitting protrusion 191 is a confirmation retaining portion. 85 is formed from one base portion of the elastic leg 187 to the other base portion on one side in the length direction). The inner end surface 193 of the confirmation retaining portion 185 is curved with the same radius of curvature as the outer peripheral surface of the pipe body 33, and the inner end portion of the confirmation retaining portion 185 has both outer surfaces on the outer peripheral surface of the pipe body 33. A pair of clamp arms 195 is provided at one end in the lengthwise direction so that the two can be sandwiched.

リテーナ１３３の弾性脚部１８７は、確認抜け止め部１８５とカバー部１８３の側部１８９との間で、カバー部１８３の湾曲部１８８の内面から互いに平行に延びる本体部１９７と、この本体部１９７の先端部に、内側に突出するように設けられた係合部１９９と、から一体的に形成されている。本体部１９７の内面は、弾性脚部１８７の延びる方向（リテーナ１３３の差込方向）に延びているが、係合部１９９側が付け根側よりも内側に位置していて（本体部１９７は係合部１９９側が付け根側よりも内側に厚く形成されている）、係合部１９９側と付け根側との間に係合段部２０１を有している。係合部１９９の内面（径方向一方側面）は、内側に向かって径方向一方側に傾斜して突出する係合面２０３となっている。また、係合部１９９の底面（径方向他方側面）２０５は、幅方向に延びるフラットな面であり、内側の側面２０６は、内側に向かって径方向一方側に湾曲して延びる湾曲面となっているが、底面２０５と側面２０６との境界位置には、係合段部２０７が形成されている。係合部１９９の長さ方向他方側面は、内側に向かって長さ方向一方側に傾斜している。 The elastic leg portion 187 of the retainer 133 includes a main body portion 197 extending in parallel with each other from the inner surface of the curved portion 188 of the cover portion 183 between the confirmation retaining portion 185 and the side portion 189 of the cover portion 183, and the main body portion 197. And an engaging portion 199 provided so as to protrude inwardly at the distal end portion. The inner surface of the main body 197 extends in the direction in which the elastic legs 187 extend (the direction in which the retainer 133 is inserted), but the engaging portion 199 side is located on the inner side of the base side (the main body portion 197 is engaged). The part 199 side is formed thicker inside than the base side), and the engaging step part 201 is provided between the engaging part 199 side and the base side. The inner surface (one radial side surface) of the engagement portion 199 is an engagement surface 203 that protrudes inward in the radial direction toward the inside. In addition, the bottom surface (the other radial side surface) 205 of the engaging portion 199 is a flat surface extending in the width direction, and the inner side surface 206 is a curved surface extending curved inward in the radial direction toward the inner side. However, an engagement step portion 207 is formed at the boundary position between the bottom surface 205 and the side surface 206. The other side surface in the length direction of the engaging portion 199 is inclined toward one side in the length direction toward the inside.

このような形状のリテーナ１３３を、リテーナ取り付け部１３５に取り付けるには、係合部１９９側から、リテーナ１３３を嵌め込み凹部１３９内に差し込む。そうすると、係合部１９９の内側の側面２０６が、ガイド−ストッパ部１４９の外面１５７にそれぞれ当接する。この状態で、さらにリテーナ１３３を押し込むと、係合部１９９がガイド−ストッパ部１４９の外面１５７上を、弾性脚部１８７を開くように変形させながら、外側にスライドする。そして、係合部１９９は、ガイド−ストッパ部１４９の外面１５７から外れ、ガイド−ストッパ部１４９の外側の側面１６１に沿って径方向他方側にスライドする。係合部１９９がガイド−ストッパ部１４９の外側の側面１６１から外れると、弾性脚部１８７の弾性復帰力により弾性脚部１８７が平行状態に戻って、係合部１９９は係合窓１５３内に入り込む（図１５参照）。平行状態である弾性脚部１８７の本体部１９７の内面同士の間隔は、ガイド−ストッパ部１４９の外側の側面１６１同士の間隔とほぼ同一であり、本体部１９７は、例えば、ガイド−ストッパ部１４９を弱く挟み付ける。また、ここでは、クランプアーム１９５は第１の通過孔１４５内に入り込んでいる。第１の通過孔１４５は、一対のクランプアーム１９５の幅（最も広い幅）とほぼ等しい幅を有している。図１５に示すリテーナ１３３の取り付け位置での取り付け状態（リテーナ１３３のカバー部１８３がリテーナ保持部１２５の外面１３７から浮き上がっている状態）では、係合部１９９の係合段部２０７がストッパ−固定部１５１のストッパ部１７９に係合し、それ以上、リテーナ１３３を押し込めないようになっている。係合段部２０７は幅方向外側にずれないようにストッパ部１７９と係合している。また、リテーナ１３３を引っ張っても、弾性脚部１８７の係合段部２０１が、ガイド−ストッパ部１４９の引き抜き防止部１６３に係合しているので、リテーナ１３３の引き抜きは規制される。ここでは、係合部１９９の内端は、パイプ体３３を通過させることができるように位置しているが、係合部１９９の間隔は、パイプ体３３の環状係合突部４９の外径よりも狭い。また、係合部１９９の内端面２０８は、係合窓１５３の長さ方向一端部に位置しているので、確認抜け止め部１８５よりも長さ方向一方側に位置している。 In order to attach the retainer 133 having such a shape to the retainer attaching portion 135, the retainer 133 is fitted and inserted into the recessed portion 139 from the engaging portion 199 side. Then, the inner side surface 206 of the engaging portion 199 comes into contact with the outer surface 157 of the guide-stopper portion 149. When the retainer 133 is further pushed in this state, the engaging portion 199 slides outward on the outer surface 157 of the guide-stopper portion 149 while deforming the elastic leg portion 187 to open. Then, the engaging portion 199 is detached from the outer surface 157 of the guide-stopper portion 149 and slides to the other radial side along the outer side surface 161 of the guide-stopper portion 149. When the engaging portion 199 is disengaged from the outer side surface 161 of the guide-stopper portion 149, the elastic leg portion 187 returns to the parallel state by the elastic restoring force of the elastic leg portion 187, and the engaging portion 199 enters the engaging window 153. Enter (see FIG. 15). The interval between the inner surfaces of the main body portion 197 of the elastic leg portion 187 in the parallel state is substantially the same as the interval between the outer side surfaces 161 of the guide-stopper portion 149. The main body portion 197 includes, for example, the guide-stopper portion 149. Pinch weakly. Here, the clamp arm 195 enters the first passage hole 145. The first passage hole 145 has a width substantially equal to the width (widest width) of the pair of clamp arms 195. In the attachment state at the attachment position of the retainer 133 shown in FIG. 15 (the cover portion 183 of the retainer 133 is lifted from the outer surface 137 of the retainer holding portion 125), the engagement step portion 207 of the engagement portion 199 is fixed to the stopper. The retainer 133 is engaged with the stopper portion 179 of the portion 151 and cannot be pushed any further. The engaging step portion 207 is engaged with the stopper portion 179 so as not to be displaced outward in the width direction. Even when the retainer 133 is pulled, the engagement step portion 201 of the elastic leg portion 187 is engaged with the pull-out preventing portion 163 of the guide-stopper portion 149, so that the pull-out of the retainer 133 is restricted. Here, the inner end of the engaging portion 199 is positioned so that the pipe body 33 can pass therethrough, but the interval between the engaging portions 199 is the outer diameter of the annular engaging protrusion 49 of the pipe body 33. Narrower than. Further, since the inner end surface 208 of the engagement portion 199 is located at one end portion in the length direction of the engagement window 153, it is located on one side in the length direction from the confirmation retaining portion 185.

図１６及び図１７はリテーナ１３３の操作態様を説明するための図である。 16 and 17 are diagrams for explaining the operation mode of the retainer 133.

パイプ体３３は、環状係合突部４９が確認抜け止め部１８５を通過するまで、すなわち、環状係合突部４９が確認抜け止め部１８５とブッシュ４３との間に位置するまで（この位置が抜け止め係合位置又は所定の位置）、リテーナ１３３が取り付けられたコネクタハウジング３内に挿入される（図１４の仮想線で示すパイプ体３３参照）。パイプ体３３の環状係合突部４９は、リテーナ取り付け部１３５に差し掛かると、リテーナ１３３の係合部１９９の長さ方向他方側面に当接し、係合部１９９を外側に押圧する。そして、環状係合突部４９が確認抜け止め部１８５を通過すると、係合部１９９は、係合段部２０７がストッパ−固定部１５１のストッパ部１７９から外れるように、外側に移動する（図１６）。ここでは、係合部１９９は、内端面２０８が環状係合突部４９に載るように当接し、突出部１６９の側面１７７と同一又はほぼ同一の幅方向位置となるように、幅方向外側にずれた状態となる。そうすると、リテーナ１３３をさらに押し込むことができるが、リテーナ１３３をさらに押し込むと、リテーナ１３３の係合部１９９は、ストッパ−固定部１５１の突出部１６９の側面１７７に案内されて径方向他方側に移動する。そして、嵌め込み突条９１の内面が、ガイド−ストッパ部１４９の外面１５７に当接するまで、リテーナ１３３を押し込むことができるが、係合部１９９は、突出部１６９の側面１７７から外れると、弾性脚部１８７の弾性復帰力により、係合面２０３が突出部１６９の固定部１７５と係合するまで、幅方向内側に移動する（図１７）。この確認固定状態では、リテーナ１３３の確認抜け止め部１８５が、第１の通過孔１４５及び第２の通過孔１４７内に入り込みに、かつ、嵌め込み突条１９１が嵌め込み凹部１３９内に嵌まり込み、リテーナ１３３のカバー部１８３が、リテーナ保持部１２５の外面に沿って位置することとなる。また、係合部１９９の係合面２０３が突出部１６９の固定部１７５と係合しているので、リテーナ１３３の抜き取り方向への移動が規制される。そして、確認抜け止め部１８５が、内端面１９３をパイプ体３３の外周面に接触させた状態で、環状係合突部４９の長さ方向他方側に位置し、環状係合突部４９と係合しているので、かつ、クランプアーム１９５が、環状係合突部４９の長さ方向他方側に位置し、パイプ体３３の外周を挟み付け、環状係合突部４９と係合しているので、第２のクイックコネクタ１２１はパイプ体３３に抜け止め状態で接続されて第２の配管接続構造を構成している（図１８参照）。 The pipe body 33 is used until the annular engagement protrusion 49 passes through the confirmation retaining portion 185, that is, until the annular engagement projection 49 is located between the confirmation retaining portion 185 and the bush 43 (this position is The retaining engagement position or a predetermined position) is inserted into the connector housing 3 to which the retainer 133 is attached (see the pipe body 33 indicated by the phantom line in FIG. 14). When the annular engagement protrusion 49 of the pipe body 33 reaches the retainer mounting portion 135, it abuts on the other side surface in the length direction of the engagement portion 199 of the retainer 133 and presses the engagement portion 199 outward. Then, when the annular engagement protrusion 49 passes the confirmation retaining portion 185, the engagement portion 199 moves outward so that the engagement step portion 207 is disengaged from the stopper portion 179 of the stopper-fixing portion 151 (FIG. 16). Here, the engaging portion 199 abuts so that the inner end surface 208 is placed on the annular engaging protrusion 49, and is located outward in the width direction so as to have the same or substantially the same width direction position as the side surface 177 of the protrusion 169. It will be in a shifted state. Then, the retainer 133 can be further pushed in. However, when the retainer 133 is further pushed in, the engaging portion 199 of the retainer 133 is guided by the side surface 177 of the protrusion 169 of the stopper-fixing portion 151 and moves to the other side in the radial direction. To do. Then, the retainer 133 can be pushed in until the inner surface of the fitting protrusion 91 comes into contact with the outer surface 157 of the guide-stopper portion 149, but when the engaging portion 199 comes off from the side surface 177 of the protruding portion 169, the elastic leg The elastic restoring force of the portion 187 moves inward in the width direction until the engagement surface 203 engages with the fixing portion 175 of the protruding portion 169 (FIG. 17). In this confirmation fixing state, the confirmation retaining portion 185 of the retainer 133 enters the first passage hole 145 and the second passage hole 147, and the fitting protrusion 191 fits into the fitting recess 139. The cover part 183 of the retainer 133 is positioned along the outer surface of the retainer holding part 125. Further, since the engaging surface 203 of the engaging portion 199 is engaged with the fixing portion 175 of the protruding portion 169, the movement of the retainer 133 in the extraction direction is restricted. The confirmation retaining portion 185 is located on the other side in the length direction of the annular engagement protrusion 49 with the inner end surface 193 in contact with the outer peripheral surface of the pipe body 33, and is engaged with the annular engagement protrusion 49. And the clamp arm 195 is positioned on the other side in the longitudinal direction of the annular engagement protrusion 49, sandwiches the outer periphery of the pipe body 33, and engages with the annular engagement protrusion 49. Therefore, the second quick connector 121 is connected to the pipe body 33 in a retaining state to constitute a second pipe connection structure (see FIG. 18).

ここで、パイプ体３３が正常にクイックコネクタ１２１に挿入されていないと、係合部１９９の係合段部２０７がストッパ−固定部１５１のストッパ部１７９から外れない。また、確認抜け止め部１８５がパイプ体３３の環状係合突部４９と干渉する。したがって、リテーナ１３３を確認固定状態となるように押し込むことはできない。 Here, if the pipe body 33 is not normally inserted into the quick connector 121, the engaging step portion 207 of the engaging portion 199 cannot be detached from the stopper portion 179 of the stopper-fixing portion 151. Further, the confirmation retaining portion 185 interferes with the annular engagement protrusion 49 of the pipe body 33. Therefore, the retainer 133 cannot be pushed into the confirmation fixed state.

本発明のクイックコネクタ及び配管接続構造は、自動車配管などに利用して、パイプ体とクイックコネクタとの接続不良の発生を効果的に防止できる。 The quick connector and the pipe connection structure of the present invention can be effectively used for automobile piping and the like to effectively prevent the occurrence of connection failure between the pipe body and the quick connector.

１、１２１クイックコネクタ
３コネクタハウジング
５、１３３リテーナ
９チューブ接続部
３３パイプ体
４５、１２５リテーナ保持部
４９環状係合突部
６９、１５３係合窓
１１１、１９９係合部 DESCRIPTION OF SYMBOLS 1,121 Quick connector 3 Connector housing 5, 133 Retainer 9 Tube connection part 33 Pipe body 45, 125 Retainer holding part 49 Annular engagement protrusion 69, 153 Engagement window 111, 199 Engagement part

Claims

A connector housing having a tube connecting portion on one side in the length direction, a retainer holding portion on the other side in the length direction, and a seal portion having an annular seal member formed on the inner peripheral surface, and the connector housing A retainer that is inserted into the retainer holding portion in a direction perpendicular to the axis and held in the mounting position, and a pipe body having an annular engagement protrusion formed on the outer peripheral surface is disposed in the pipe insertion hole of the connector housing. A quick connector that is inserted relative to each other and connected in a state of being prevented from being detached by engagement of the annular engagement protrusion and the retainer,
The retainer holding part is formed with an engagement window that opens into the pipe insertion hole,
The retainer is engaged with the retaining portion formed so as to be engaged with the annular engagement protrusion in a retaining state, and the engagement window to prevent the retainer from moving in the insertion direction, An engaging portion that holds the retainer in the attachment position, and the engaging portion enters the pipe insertion hole from the engagement window and relatively advances in the pipe insertion hole. It protrudes to the position where it touches the protrusion
The engagement portion of the retainer is pushed by the annular engagement protrusion when the annular engagement protrusion reaches the retaining engagement position, and the engagement with the engagement window is released. Formed into
When the retainer is pushed in the direction perpendicular to the axis after the engagement between the engagement portion and the engagement window is released, the retainer moves to the confirmation fixing position, and the retaining portion is the annular engagement protrusion. A quick connector characterized in that it is engaged in a state that prevents it from coming off.

The quick connector according to claim 1, wherein the engaging portion is formed at a distal end portion of the elastic leg portion.

The retainer portion of the retainer snaps to the pipe body adjacent to the annular engagement protrusion on the other side in the length direction of the annular engagement protrusion when the retainer moves to the confirmation fixing position. 3. A quick connector according to claim 1 or 2, wherein the quick connector is a pair of clamp arms or C-shaped clamps that fit together.

The retaining portion of the retainer is adjacent to the annular engagement protrusion on the other side in the longitudinal direction of the annular engagement protrusion when the retainer moves to the confirmation fixing position. 3. The quick connector according to claim 1, wherein the quick connector is a confirmation retaining portion that contacts an inner end surface of the quick connector.

5. The quick connector according to claim 1, wherein the retainer is formed so as not to protrude from an outer periphery of the retainer holding portion at the confirmation fixing position.

The quick connector according to claim 2, wherein the retainer has a cover portion that covers the elastic leg portion.

A pipe connection structure for fluid transfer,
A quick connector according to any one of claims 1 to 6;
A tube fitted to the tube connector of the quick connector;
A pipe body connected to the quick connector,
The retainer is held by the retainer holding portion at a confirmation fixing position,
The pipe connection structure according to claim 1, wherein the annular engagement protrusion is connected to the quick connector by engaging the retaining portion of the retainer.