JP2009257583A - Connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new connection method of piping causing no bending of the engaging claw of a retainer. <P>SOLUTION: A connector 10 causes a protruding piece 66, which extends into a fourth connecting hole 26d of a housing 20, to catch on a right catching tip 44bR and a left catching tip 44bL of the retainer 40, and half-attaches the retainer 40. As a pipe P is inserted, a stopper ring 60 is subjected to an external force from a flange section Pa via the protruding piece 66, in a direction of an axis of a third connecting hole 26c. A circumferential guidance protrusion 74 on the stopper ring 60 is guided by a circumferential guidance groove 106 of a ring sliding/rotating guidance groove 100 in the third connecting hole 26c, and the stopper ring 60 moves deeper into the connecting hole while rotating, and is disengaged from the right catching tip 44bR and the left catching tip 44bL, thereby allows the half-attached retainer 40 to be attached. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a connector used for connecting a pipe having an annular protrusion on its outer periphery.

  This type of connector is also called a quick connector, and various proposals have been made for the purpose of simplifying pipe connection (for example, Patent Document 1). The connector of this patent document is provided with a detection claw that prevents the retainer from being completely attached when the pipe has not been inserted into the insertion hole of the housing. The detection claw is engaged with a retainer mounting hole in the housing, and the engagement of the detection claw is released by interfering with the annular protrusion and bending outward from the protrusion as the pipe is inserted into the insertion hole. The retainer can be installed.

JP 2005-172161 A

  In the connector proposed in the above-mentioned patent document, the retainer cannot be mounted unless the detection claw is disengaged. To disengage the detection claw, the retainer claw of the retainer is bent outward by an annular protrusion of the pipe. It is indispensable. Further, since it is necessary to form the detection claw thinly from the viewpoint of ensuring the bending of the detection claw to the outside, a problem has been pointed out that the rigidity of the detection claw is lowered.

  In view of the above-described problems, an object of the present invention is to provide a new pipe connection method that does not involve bending of the engaging claws of the retainer.

  In order to achieve at least a part of the above object, the present invention adopts the following configuration.

[Applicable: Connector]
A connector used to connect a pipe having an annular protrusion on the outer periphery,
A housing having an opening side insertion hole surrounding the annular protrusion and a continuous insertion hole provided continuously to the opening side insertion hole;
A retainer that is attached to the housing and has an engagement portion provided so as to enter the opening-side insertion hole and interferes with the annular protrusion inside the opening-side insertion hole to prevent the pipe from being removed;
When the pipe is not inserted, the retainer is held in a semi-attached state by interfering with the engaging portion of the retainer and preventing the retainer from being completely attached. A semi-attachment holding part,
A protrusion abutting portion disposed inside the opening-side insertion hole and contacting the annular protrusion that has entered the opening-side insertion hole;
A tube that includes the protrusion abutting portion and the semi-attachment holding portion at one end, and is inserted into the continuous insertion hole so that the protrusion contact portion and the semi-attachment holding portion are positioned inside the opening-side insertion hole. Body,
When the tubular body inserted into the continuous insertion hole receives an external force on the side of the continuous insertion hole along the axis, the tubular body is directed toward the back side of the continuous insertion hole by the external force. A retracting engagement part for engaging the tubular body with the continuous insertion hole so as to be retractable;
The retracting engagement portion is
When the annular projection reaches an insertion completion position exceeding the engagement portion while the tubular body is retracted by the external force exerted by the annular projection abutting on the projection abutting portion, the half-mounting holding portion and the engagement portion are engaged. The gist is to move the semi-attached holding part to the side of the continuous insertion hole by retracting the tubular body until the interference with the joint part is released.

  In the connector configured as described above, the retainer is mounted on the housing from the crossing direction intersecting the axis of the opening-side insertion hole, and when the retainer is completely mounted, the retainer has the engaging portion included in the opening-side insertion hole. To prevent the pipe from being pulled out by interfering with the annular projection of the pipe. On the other hand, when the pipe has not been inserted, the semi-mounting holding portion disposed inside the opening side insertion hole interferes with the engaging portion of the retainer and prevents the retainer from being completely mounted. Retained. When the pipe is inserted in this retainer half-mounted state, the annular protrusion that has entered the opening-side insertion hole comes into contact with the protrusion abutting portion disposed inside the opening-side insertion hole, so that the pipe can be inserted. The accompanying external force is exerted along the axis.

  Since this projection abutting portion is provided at one end of the tubular body together with the semi-attached holding portion, the external force described above is applied to the tubular body inserted into the continuous insertion hole along the piping axis. To the side. Therefore, the tubular body is retracted toward the back side of the continuous insertion hole by the retracting engagement portion, and when the annular protrusion reaches the insertion completion position exceeding the engaging portion of the retainer, the retracting engagement portion occurs. By retracting the tubular body, the semi-attached holding part moves to the side of the continuous insertion hole, and the interference with the engaging part of the retainer is released. As a result, according to the connector configured as described above, a pipe having an annular protrusion can be connected without causing bending of the member on the retainer side.

  The connector described above can be configured as follows. For example, the retracting engagement portion is configured to be retracted by sliding the intermediate state toward the back side of the continuous insertion hole while rotating the tubular body around the shaft core by the external force. When the annular projection reaches the insertion completion position, the half-mounting holding portion is inserted continuously until the interference between the half-mounting holding portion and the engaging portion is released by rotation and sliding of the tubular body. It can be moved to the side of the hole. In this way, the half-mounting holding portion provided at one end of the tubular body rotates away from the engaging portion by rotation integrally with the tubular body, and also separates from the engaging portion by sliding integrally with the tubular body. The interference between the semi-mounting holding portion and the engaging portion is quickly resolved, and the mounting of the retainer can be completed.

  In addition, the protrusion abutting portion is a plate-like elastic piece extending along the axis inside the opening-side insertion hole, and after contacting the annular protrusion, the annular protrusion is used in the pipe radial direction. It expands and bends, and when the annular protrusion reaches the insertion completion position, it is elastically returned to engage with the annular protrusion. In this way, as the pipe is inserted, the protrusion abutting portion expands in the pipe radial direction by the annular protrusion and bends once. Then, when the annular protrusion reaches the insertion completion position, it rebounds and engages with the annular protrusion. Match. Therefore, by this elastic return and the engagement with the annular projection at that time, the operator has a sense of moderation to recognize the state of the insertion completion when the annular projection has reached the insertion completion position exceeding the engaging portion of the retainer. Since it can be provided, the retainer can be quickly put into a fully-fitted state from the semi-fitted state with the recognition of completion of pipe insertion due to this moderation feeling. As a result, according to the connector of the said aspect, piping which has an annular protrusion can be connected easily, and working efficiency increases.

  In this case, if the tip of the protrusion abutting portion which is an elastic piece is used as the engaging portion engaging with the annular protrusion, the engagement with the annular protrusion occurs at the engaging portion of the tip of the bent protrusion abutting portion. Therefore, the moderation feeling associated with the engagement can be remarkable. Therefore, the completion of the pipe insertion due to the moderation feeling is also ensured, which is desirable from the viewpoint of promptly completing the retainer installation.

  Further, if the semi-attachment holding part is also used as the protrusion contact part, the tubular body may be provided with the semi-attachment holding part also serving as the protrusion contact part. Cost reduction accompanying simplification of the shape of the molding die can be achieved.

  Further, a seal member that seals the outer periphery of the pipe portion on the distal end side of the inserted pipe is disposed in the continuous insertion hole, and the seal member may be held by the tubular body. it can. That is, the tubular body is caused to function as a stopper ring for the seal member. By doing so, the tubular member can be used to hold the seal member and arrange the semi-attachment holding portion and the projection contact portion in the opening side insertion hole, thereby reducing the number of parts and simplifying the configuration associated therewith. As a result, the assembling work can be simplified.

  When the tubular body is provided with a convex portion projecting in the outer diameter direction, and the retainer is held in a semi-mounted state by the semi-mounted holding portion of the tubular body of the housing. In addition, it is possible to provide a recess for positioning the tubular body by causing the protrusion to enter. By doing so, the tubular body can be stopped and held so that the retainer is held in the semi-attached state by the semi-attachment holding portion, so that the connection and removal of the pipes are simplified. In this case, the concave portion of the housing can be formed by arranging the first convex portion and the second convex portion along the housing axis on the elastic piece of the housing that can be elastic in the outer diameter direction.

  Further, in the case where the protrusion contact portion of the tubular body causes elastic return and engages with the annular protrusion, the engagement of the protrusion contact portion that causes the elastic return and engages with the annular protrusion in the housing. An engagement maintaining mechanism that maintains the state until the tubular body returns to the bullet return position after retreating from the bullet return position where the bullet return has occurred toward the back side of the continuous insertion hole. It can also be. In this way, when the pipe is removed, only the pipe is inadvertently dropped and the tubular body is returned to its original position by maintaining the engagement between the annular projection and the projection abutting portion until the tubular body returns to the location where the elastic body is returned to the elastic position. The situation that does not return can be prevented.

It is a perspective view which decomposes | disassembles and shows the connector 10 concerning one Example of this invention. It is explanatory drawing which shows a mode that the retainer 40 was half mounted | worn with the piping P incomplete insertion state. It is explanatory drawing which shows the housing 20 of the connector 10 in a semi-sectional view along the pipe axis direction in the state where the insertion of the pipe P has not been completed. 4 is an explanatory view showing a periphery of a lower end portion of a guide groove 28 of the housing 20 in a cross-sectional view. FIG. It is explanatory drawing which shows the retainer 40 in front view. It is explanatory drawing which shows the positional relationship of the retainer 40 made into the semi-attached state by the protrusion piece 66, and the piping P. FIG. FIG. 3 is a schematic perspective view showing a stopper ring 60 with a part thereof broken. FIG. 8 is a schematic perspective view of the stopper ring 60 as viewed from the direction A in FIG. 7. It is explanatory drawing which shows the relationship between the ring sliding rotation guide protrusion 70 of the stopper ring 60, the protruding item | line 64, the ring sliding rotation guide groove 100 of the 3rd connection hole 26c, and the recessed item 27. 2 is a perspective view schematically showing a ring sliding rotation guide groove 100 by breaking a mounting housing 22 of a housing 20. FIG. It is sectional drawing of the 11-11 line in FIG. It is explanatory drawing which shows the relationship between the stopper ring 60 in the initial position, and the retainer 40, expanding the principal part. It is explanatory drawing which shows the mode of a movement from the initial position of the stopper ring 60 to a rotation completion position by the cross sectional view linked | related with the ring sliding rotation guide groove 100, and the front view of the stopper ring 60. FIG. It is explanatory drawing which carries out the cross-sectional view in connection with the mode of the movement of the stopper ring 60 from the initial position to the completion position of rotation in connection with the mode of insertion of piping. It is explanatory drawing which shows the relationship between the stopper ring 60 in a rotation completion position, and the retainer 40, expanding the principal part. FIG. 2 is a perspective view showing the connector 10 </ b> A in an exploded view, corresponding to FIG. 1. FIG. 4 is an explanatory view showing the housing 220 of the connector 10 </ b> A in a half cross-sectional view along the pipe axial direction in a state where pipe insertion has not been completed. FIG. 19 is an explanatory diagram showing a relationship between a state of a cut end surface of the mounting housing 222 along a line 18-18 in FIG. 16 and the retainer 240; It is explanatory drawing shown in a perspective view, partially breaking the stopper ring 360. FIG. 20 is a cross-sectional end view taken along line 20-20 in FIG. 19. It is explanatory drawing which shows the principal part of the housing front-end | tip involved in positioning of a stopper ring by a perspective view. It is explanatory drawing which fractures | ruptures the principal part of the housing 220 and the stopper ring 360, and expands and displays it by the 22-22 line | wire in FIG. It is explanatory drawing which shows the mode of insertion of the piping P by the front view and principal part sectional view of 10 A of connectors. It is explanatory drawing which shows the mode of removal of the piping P by the front view and principal part sectional view of 10 A of connectors.

  Hereinafter, embodiments of the present invention will be described based on examples. FIG. 1 is an exploded perspective view showing a connector 10 according to an embodiment of the present invention, FIG. 2 is an explanatory view showing a state in which a retainer 40 is semi-mounted in a state where the insertion of the pipe P is not completed, and FIG. It is explanatory drawing which shows the housing 20 of the connector 10 by half sectional view along the piping axis direction in the insertion incomplete state.

  The connector 10 is for connecting a pipe P made of metal or resin to a tube Tb made of synthetic resin, and includes a housing 20, a retainer 40, a seal member 56 made of an O-ring, and a stopper ring 60. I have. The pipe P is formed of a round pipe material made of metal or resin, and includes a flange portion Pa formed of a bulge portion protruding in an annular shape on an outer peripheral surface at a position spaced a predetermined distance from the front end surface of the pipe. The pipe P has a connecting portion Pb on the front end side from the flange portion Pa, and a sealing surface sealed by the sealing member 56 on the outer peripheral surface thereof. In this case, the surface strength of the connecting portion Pb is Rz 12.5 μm or less (JIS: B0601-1994), and the sealing performance when pressed by the sealing member 56 is ensured.

  The housing 20 is a cylindrical resin molded product, and one end side is a mounting housing 22 of the retainer 40, and the other end side is a bamboo shoot-like tube connecting portion 24 into which the tube Tb is press-fitted. Hereinafter, the following description will be made with the mounting housing 22 side of the connector 10 as the front side and the tube connecting portion 24 side as the rear side.

  The housing 20 has multi-stage first to fourth connection holes 26a to 26d in the cylinder from the rear to the front. The first connection hole 26a is a flow path leading to the tube Tb, and the second connection hole 26b is a pipe tip insertion hole into which the connection part Pb of the pipe P is inserted. The third connection hole 26c is a mounting hole for the seal member 56 and a stopper ring 60 described later, and accommodates the seal member 56 and the stopper ring 60 side by side from the rear side. In this case, the third connection hole 26c is provided with the recess 27 and the ring sliding rotation guide groove 100 over a partial region of the peripheral wall thereof, and can slide the stopper ring 60 in the pipe axis direction and around the axis. The seal member 56 is held by the stopper ring 60 and then held. The fourth connection hole 26 d is a rectangular bottomed hole that follows the outer shape of the mounting housing 22, and is a flange insertion hole that surrounds the flange portion when the flange portion Pa enters with the insertion of the pipe P. That is, the 4th connection hole 26d of a present Example corresponds to the opening side insertion hole of this invention, and the 3rd connection hole 26c corresponds to a continuous insertion hole. The sliding / rotation of the stopper ring 60 by the recess 27, the ring sliding rotation guide groove 100, and the ring sliding rotation guide groove 100 will be described later.

  In addition, the housing 20 is provided with two guide grooves 28 on the left and right side surfaces in FIG. 1 of the mounting housing 22 for mounting the retainer 40, and the retainer mounted on the upper surface of the housing is connected to the front guide groove 28. A groove 29 is provided. The retainer mounting groove 29 has a bottom at a portion continuous with the guide groove 28, and the retainer mounting groove 29 is penetrated at a portion other than the bottomed portion to form a retainer mounting hole 30. FIG. 4 is an explanatory view showing the periphery of the lower end portion of the guide groove 28 of the housing 20 in a sectional view. As shown in FIG. 4, the lower end of the guide groove 28 is an engagement recess 28 b of a retainer engagement claw 43 included in the retainer 40.

  The retainer 40 is a resin molded product, and is attached to both ends of a plate-like retainer operation portion 41 that forms the top of the retainer in order to be mounted on the housing 20 from a direction orthogonal to the axis of the fourth connection hole 26d. The two engaging arms 42 are provided, and the tip thereof is a retainer engaging claw 43 that engages with the engaging recess 28 b at the lower end of the guide groove 28. The retainer 40 includes a left and right engagement arm 44 and a central engagement arm 46 that project in a plate shape in the longitudinal direction of the retainer operation portion 41 in order to prevent the pipe P from being removed. Are a right interference engagement end 44bR and a left interference engagement end 44bL that interfere with a protruding piece 66 of a stopper ring 60 described later. When the retainer 40 is mounted on the housing 20, the left and right engaging arms 44 and the central engaging arm 46 are connected from the retainer mounting hole 30 of the retainer mounting groove 29 in the retainer operating portion 41 to the inside of the fourth connection hole 26 d. It enters from the direction orthogonal to the axial center of the hole.

  FIG. 5 is an explanatory view showing the retainer 40 as viewed from the front. As shown in FIG. 5, the retainer 40 includes an arc periphery 48 cut out in an arc shape in the center engagement arm 46 and the left and right engagement arms 44 in the front view, and the right interference engagement end 44bR and the left The side interference engagement end 44bL is provided with an arc periphery 49 cut out in an arc shape. The arc periphery 48 is formed to be larger than the pipe portion outer diameter PΦ of the pipe P and smaller than the outer periphery diameter PaΦ of the flange portion Pa, and the arc periphery 49 includes the right interference engagement end 44bR and the left interference engagement end 44bL. It is formed in an arc shape connected to the arc periphery 48 so as to reduce the lower end area. In a state in which the retainer 40 has been attached to the housing 20, the left and right engaging arms 44 and the central engaging arm 46 have the positional relationship shown in FIG. 5 with respect to the pipe P and the flange portion Pa. The circular arc periphery 48 thus made interferes with the flange portion Pa to prevent the piping P from being removed. In order to prevent such a disconnection by the left and right engaging arms 44 and the central engaging arm 46, in the housing 20, the retainer mounting hole 30 is formed together with the retainer mounting groove 29 in consideration of the formation position of the flange portion Pa in the pipe P. Yes.

  A stopper ring 60 shown in FIG. 1 is a resin molded product, and has one end side of an annular ring portion 62 as a flange 63 and includes two protruding pieces 66 at an equal pitch from the flange. The protruding piece 66 includes an interference portion 68 that is bent in a key shape on the pipe shaft core side on the tip side. When the stopper ring 60 is incorporated into the third connection hole 26c as will be described later, the projecting piece 66 is positioned and opposed in the fourth connection hole 26d, and the shaft of the connection hole is formed inside the fourth connection hole 26d. Extends along the heart. The stopper ring 60 having the protruding piece 66 is a resin molded product, and the protruding piece 66 is a plate-like body protruding from the ring portion 62. It becomes a fragment. As shown in FIGS. 2 and 3, the protruding piece 66 causes the interference portion 68 to be coupled to the right interference engagement end 44 b R of the left and right engagement arms 44 in the retainer 40 attached to the housing 20 and to the left interference. Interference with the joint end 44bL prevents the retainer 40 from being completely mounted. Therefore, in a state where the insertion of the pipe P has not been completed, the retainer 40 is moved to FIGS. 2 and 3 due to interference between the interference portion 68 of the protruding piece 66, the right interference engagement end 44bR, and the left interference engagement end 44bL. It is held in the half-mounted state shown.

  Since the ring part 62 and the projecting piece 66 are formed larger than the outer diameter of the connection part Pb of the pipe P, in the housing 20 in which the stopper ring 60 is accommodated, the pipe P connects the connection part Pb to the ring part 62. And is inserted into the second connection hole 26 b of the housing 20 so as to enter the protruding piece 66 and the seal member 56. Since the outer peripheral end of the interference part 68 of the protruding piece 66 is larger than the outer peripheral edge diameter PaΦ of the flange part Pa, the pipe P presses the end surface of the flange part Pa against the interference part 68 at the time of insertion. Since the projecting piece 66 is a plate-like elastic piece, it is bent and rebounded due to interference between the flange portion Pa of the pipe P and the interference part 68 accompanying the pipe insertion, as will be described later.

  FIG. 6 is an explanatory diagram showing the positional relationship between the retainer 40 and the pipe P that are half-mounted by the protruding piece 66. As shown in FIG. 6, in a state where the retainer 40 is half-mounted, the right interference engagement end 44bR and the left interference engagement end 44bL are positioned outside the flange portion Pa and the interference portion 68 of the protruding piece 66. Is interfering. Since the arc peripheral edge 49 is located on the outer peripheral side of the flange portion Pa, the pipe P is connected to the right interference engagement end 44bR and the left interference engagement end 44bL when the retainer 40 is half-mounted. Or without interfering with the arc periphery 49, it can be inserted into the back side of the drawing.

  FIG. 7 is a schematic perspective view showing the stopper ring 60 with a part thereof broken, and FIG. 8 is a schematic perspective view of the stopper ring 60 as viewed from the direction A in FIG. As shown in these drawings, the stopper ring 60 is provided with a pipe tip guide hole 67 whose diameter is larger than the pipe portion outer diameter PΦ of the pipe P on the flange 63 side, and the back side thereof is provided for the insertion guide of the pipe P. The pipe guide hole 69 is used. Further, the stopper ring 60 is provided with a ridge 64 on a part of the outer peripheral wall of the ring part 62, and two rings formed so as to protrude along the outer periphery of the ring part 62 between the ridges. The sliding rotation guide protrusions 70 are provided at an equal pitch. The protrusion 64 can be resiliently radiated in the radial direction by providing a depression or the like at the base. The ring sliding rotation guide protrusion 70 includes an axial direction guide protrusion 72 extending in the axial direction from the back surface side of the flange 63, a circumferential guide protrusion 74 extending obliquely from the end of the protrusion, and the protrusion. And a notch 78 on the upper edge side of the end portion 76.

  Here, how the stopper ring 60 is attached to the third connection hole 26c will be described. FIG. 9 is an explanatory view showing the relationship between the ring sliding rotation guide protrusion 70 of the stopper ring 60, the protrusion 64, the ring sliding rotation guide groove 100 of the third connection hole 26c, and the recess 27, and FIG. FIG. 11 is a cross-sectional view taken along the line 11-11 in FIG.

  As shown in these drawings, the housing 20 has an axial edge 102 extending in the axial direction from the opening peripheral edge of the third connection hole 26c in the ring sliding rotation guide groove 100 of the third connection hole 26c, and The notch 104 at the lower end of the edge, the circumferential guide groove 106 extending obliquely from the notch 104 along the connection hole inner peripheral wall, and the rear side wall surface 106a of the guide groove extend along the connection hole inner peripheral wall. And an extended inclined groove 108 formed as described above. In this case, since the ring sliding rotation guide groove 100 is formed deeper than the protrusion height of the ring sliding rotation guide protrusion 70 in the stopper ring 60, the stopper ring 60 has a third outer peripheral wall of the ring portion 62. The ring sliding rotation guide protrusion 70 enters the ring sliding rotation guide groove 100 and is incorporated into the third connection hole 26c while being in contact with the inner peripheral wall of the connection hole 26c.

  For this reason, the stopper ring 60 has its own notch 78 joined to the notch 104 of the ring sliding rotation guide groove 100 (hereinafter, the position in this state is referred to as the initial position). It becomes possible to slide in the direction, that is, the axial direction of the third connection hole 26c. The sliding completion position is a position where the protruding side wall of the circumferential guide protrusion 74 is in contact with the back side wall surface 106a. When the stopper ring 60 slides in the axial direction from the initial position to the sliding completion position, the circumferential guide protrusion 74 enters the circumferential guide groove 106 of the ring sliding rotation guide groove 100. Thus, the stopper ring 60 is rotatable so that the circumferential guide protrusion 74 moves along the circumferential guide groove 106. That is, as shown in FIG. 9, the stopper ring 60 can rotate in the normal rotation direction Xa to the rotation completion position where the circumferential guide protrusion 74 reaches the end of the circumferential guide groove 106. In the rotation in the reverse rotation direction Xb, the stopper ring 60 returns from the rotation completion position to the sliding completion position, so that the stopper ring 60 is pulled in the axial direction of the connection hole thereafter, thereby joining the notch 78 to the notch 104 and initial. Return to position.

  The above-described sliding and rotating operations of the stopper ring 60 occur when the stopper ring 60 receives a force from the axial direction of the third connection hole 26c. That is, when the stopper ring 60 in the initial position is pressed by receiving an external force along the axial direction of the third connection hole 26c, the stopper ring 60 first moves from the initial position to the sliding completion position on the connection hole axis. Slide along. In this state, since the circumferential guide protrusion 74 can enter the circumferential guide groove 106 of the ring sliding rotation guide groove 100, the stopper ring 60 further extends in the axial direction of the third connection hole 26c. The stopper ring 60 moves while rotating in the positive rotation direction Xa so that the circumferential guide protrusion 74 is guided by the circumferential guide groove 106 when it is pushed by receiving an external force along the direction from the initial position to the rotation completion position. It retracts in the direction of the connecting hole axis.

  Conversely, when an external force is applied to pull the stopper ring 60 in the rotation completion position from the third connection hole 26c, the stopper ring 60 rotates in the reverse direction with the circumferential guide protrusion 74 guided by the circumferential guide groove 106. It moves while rotating in the direction Xb. Further, when an external force is applied to pull out the stopper ring 60, when the circumferential guide projection 74 is removed from the circumferential guide groove 106, the stopper ring 60 slides to the initial position along the axial direction of the third connection hole 26c. 78 is joined to the notch 104. Thus, when the stopper ring 60 is in the initial position, the convex strip 64 of the ring portion 62 in the stopper ring 60 enters the concave strip 27 of the third connection hole 26c. That is, in the connector 10 of this embodiment, when the pipe P is inserted / connected, the stopper ring 60 is brought to the initial position by inserting the protrusion 64 of the ring portion 62 into the recess 27 of the third connection hole 26c. Stop. In this initial position, the connector 10 connects the protruding piece 66 of the stopper ring 60 with the right interference engagement end 44bR of the left and right engagement arms 44 in the retainer 40 and the left as shown in FIGS. The interference is caused to interfere with the side interference engagement end 44bL.

  In this embodiment, when the stopper ring 60 is set to the initial position as described above, the protrusion 64 of the stopper ring 60 is inserted into the recess 27 formed in the third connection hole 26c. 63 can also be used. In this case, the formation of the ridges 64 and the ridges 27 is stopped, and the fourth connection hole 26d where the flange 63 is located is a circular hole larger than the flange 63 in the vicinity of the bottom, and an annular wall is formed on the inner peripheral wall of the circular hole. Two stripes are provided. When the stopper ring 60 is in the initial position, the flange 63 can be inserted between the two annular convex portions so that the flange 63 is sandwiched between the annular convex portions.

  Next, how the stopper ring 60 is retracted from the initial position to the rotation completion position when the pipe P is inserted will be described in relation to the transition of the interference state between the protruding piece 66 and the left and right engaging arms 44. FIG. 12 is an explanatory view showing the relationship between the stopper ring 60 and the retainer 40 in the initial position while enlarging the main part. FIG. 13 shows the movement of the stopper ring 60 from the initial position to the rotation completion position. FIG. 14 is a cross-sectional view in which the state of movement of the stopper ring 60 from the initial position to the rotation completion position is related to the state of insertion of the pipe P. FIG. 15 is an explanatory diagram showing the relationship between the stopper ring 60 and the retainer 40 at the rotation completion position while enlarging the main part.

  When the pipe P is not inserted, the stopper ring 60 is in the above-described initial position, and the protruding piece 66 is positioned to the left and right inside the fourth connection hole 26 d of the housing 20. Before the pipe is inserted, that is, before the pipe is connected, the connector 10 inserts the engaging arm 42 of the retainer 40 into the guide groove 28 of the housing 20 and attaches the retainer 40 to the housing 20. As the retainer is mounted, the connector 10 causes the left and right engaging arms 44 and the center engaging arm 46 of the retainer 40 to enter the inside of the fourth connection hole 26 d from the retainer mounting hole 30. Since the stopper ring 60 accommodated in the third connection hole 26c of the housing 20 positions the protruding piece 66 inside the fourth connection hole 26d as described above, the retainer 40 is connected to the right interference engagement end 44bR. Since the left interference engagement end 44bL interferes with the interference portion 68 of the protruding piece 66, further insertion is prevented and the left interference engagement end 44bL is held in the half-mounted state shown in FIG. In the present embodiment, as described later, the interference described above is released by retraction accompanied by rotation of the stopper ring 60, so that the left interference engagement end 44bL is provided on the stopper ring 60 side as shown in FIG. The notch 45 narrows the interference area between the left interference engagement end 44bL and the interference portion 68.

  In this way, with the retainer 40 being semi-mounted, the pipe P is inserted into the fourth connection hole 26d from the connection portion Pb side. First, as described above, the pipe P passes through the fourth connection hole 26d without interfering with the right interference engagement end 44bR, the left interference engagement end 44bL and the arc peripheral edge 49 of the retainer 40 that is semi-mounted, The connecting portion Pb is inserted until it enters the second connecting hole 26b beyond the pipe guide hole 69 and the seal member 56 of the ring portion 62 (FIG. 14A). In this state, as shown in FIG. 13A, the stopper ring 60 is in the initial position, and the notch 78 is joined to the notch 104 of the ring sliding rotation guide groove 100.

  As the pipe is inserted, the flange portion Pa of the pipe P interferes with the interference portion 68 at the tip of the protruding piece 66, so that the stopper ring 60 is moved to the back side of the third connection hole 26c via the protruding piece 66 by further pipe insertion. Press. That is, an external force is applied to the stopper ring 60 to press it in the axial direction through the flange portion Pa. Therefore, as described above, the stopper ring 60 slides and retreats along the axial direction of the third connection hole 26c from the initial position to the sliding completion position by receiving this external force (FIG. 13B), and the piping Insertion of P proceeds by this sliding retraction (FIG. 14B). Even in the interference range between the right interference engagement end 44bR and the left interference engagement end 44bL of the retainer 40 and the interference portion 68 of the stopper ring 60, the width of the stopper ring 60 becomes narrower. In this case, on the side of the left interference engagement end 44bL, since the interference range with the interference portion 68 is narrowed from the beginning by the notch 45, the interference between the left interference engagement end 44bL and the interference portion 68 does not occur at this time. It is almost solved.

  In the process of further insertion of the pipe P, external force is continuously applied to the stopper ring 60 by the flange portion Pa. Therefore, the stopper ring 60 that receives this external force rotates in the positive rotation direction Xa so that the circumferential guide projection 74 is guided by the circumferential guide groove 106 of the ring sliding rotation guide groove 100 while rotating as described above. It retracts (rotates) along the axial direction of the third connection hole 26c to the completion position (FIG. 13C). In this case, as shown in the front view of the stopper ring 60 in FIG. 13, the interference portion 68 rotates in the forward rotation direction Xa together with the stopper ring 60, so that the right interference engagement end 44bR is separated from the engagement end. First, interference with the engagement end is eliminated. As for the left interference engagement end 44bL, the interference portion 68 is rotated and retracted to the back side of the paper surface in FIG. 13, so that the interference between the left interference engagement end 44bL and the interference portion 68 is also eliminated. When the stopper ring 60 is rotated and retracted along the axial direction of the third connection hole 26c to the rotation completion position (FIG. 13D), the stopper ring 60 further rotates the interference portion 68 of the protruding piece 66 in the forward direction. By rotating in the direction Xa, the interference between the right interference engagement end 44bR and the left interference engagement end 44bL is solved until the left and right engagement arms 44 can be lowered. In this case, with respect to the left interference engagement end 44bL, sliding back to the sliding completion position of the stopper ring 60 indicated by the white arrow Y1 in FIG. 15 and back of the stopper ring 60 indicated by the white arrow Y2 are performed. The interference with the interference unit 68 is released by the rotational retraction to the side.

  In this case, it is possible to prevent the center engaging arm 46 and the left and right engaging arms 44 of the retainer 40 from interfering with the flange portion Pa of the pipe P in a state where the interference as described above is released. In other words, in a state where the insertion of the pipe P has advanced until the stopper ring 60 is retracted to the rotation completion position by the flange portion Pa, the flange portion Pa is behind the left and right engaging arms 44 and the central engaging arm 46 of the retainer 40. If it advances to (2), the retainer 40 can be quickly mounted from the semi-mounted state.

  In the connector 10 of this embodiment, the projecting piece 66 is a plate-like elastic piece extending from the flange 63, thereby giving the operator a sense of moderation of the completion of insertion as follows. In addition, in order to ensure the provision of moderation, the flange portion Pa interferes with the left and right engaging arms 44 and the central engaging arm 46 of the retainer 40 when the stopper ring 60 is retracted to the rotation completion position. Thus, further insertion of the piping P was attempted. If it is sufficient that the pipe P can be connected without causing bending of the constituent members of the retainer 40, the flange portion Pa is retracted to the rotation completion position of the stopper ring 60, and the left and right engaging arms 44 of the retainer 40 are connected. Alternatively, the retainer 40 can be mounted so as not to interfere with the central engagement arm 46. In this case, the flange portion Pa of the pipe P has reached the insertion completion position with the stopper ring 60 retracted to the rotation completion position.

  In the state where the stopper ring 60 is retracted to the rotation completion position, the flange portion Pa is in contact with the end face of the interference portion 68 as shown in FIG. The stopper ring 60 has already retracted to the rotation completion position and does not cause any further rotation by the circumferential guide groove 106, so that the stopper ring 60 remains at this rotation completion position. Therefore, the insertion of the pipe P can be continued so that the flange portion Pa in contact with the end surface of the interference portion 68 exceeds the interference portion 68. When the insertion is continued in this way, the protruding piece 66 has a plate shape. Due to the fact that it is a bullet piece, it is once bent in the pipe radial direction due to the interference between the flange portion Pa and the interference portion 68 as shown by a two-dot chain line in FIG. And when the flange part Pa gets over the interference part 68, the protrusion piece 66 will elastically return so that the interference part 68 may engage with the outer edge of the flange part Pa. In this case, the flange portion Pa of the pipe P reaches the insertion completion position that is surely located behind the left and right engaging arms 44 and the central engaging arm 46 of the retainer 40 and does not interfere with these engaging arms (see FIG. 14 (D)), the semi-retained retainer 40 can be quickly mounted. Specifically, the retainer 40 is further pushed in from the half-mounted state shown in FIGS. 2 and 3, and the retainer engagement claw 43 at the lower end of the engagement arm 42 is inserted into the engagement recess 28 b of the guide groove 28 in the housing 20. Engage (see FIG. 4).

  When the retainer 40 is thus mounted, the pipe P is connected to the tube Tb by the connector 10 after the connection portion Pb is sealed by the seal member 56. In this connected state, the connector 10 of this embodiment causes the left and right engaging arms 44 and the central engaging arm 46 of the retainer 40 to interfere with the flange portion Pa of the pipe P inside the fourth connecting hole 26d. , Try to prevent the piping from being removed.

  As described above, in the connector 10 of this embodiment, when the insertion of the pipe P is completed and the mounting of the retainer 40 in the semi-mounted state is completed, the stopper ring 60 is already in the third connection hole 26c as described above. By sliding and retreating to the back side of the retainer, the interference between the right interference engagement end 44bR, the left interference engagement end 44bL and the protruding piece 66 (specifically, the interference portion 68) of the retainer 40 is solved, The retainer 40 can be mounted. In addition, in the connector 10 of the present embodiment, the projecting piece 66 is expanded in the pipe radial direction by the flange portion Pa and once bent, and then the flange portion Pa becomes the left and right engaging arms 44 and the central engaging arms of the retainer 40. When the insertion completion position that does not interfere with 46 is reached, the projecting piece 66 is elastically returned to engage the interference portion 68 with the flange portion Pa. Therefore, the flange portion Pa is inserted into the operator beyond the left and right engaging arms 44 and the central engaging arm 46 by the elastic return of the protruding piece 66 and the engagement with the flange portion Pa of the interference portion 68 at that time. A moderation feeling that recognizes the state of completion of insertion that has reached the completion position can be given. As a result, according to the connector 10 of the present embodiment, the semi-retained retainer 40 can be quickly mounted with the recognition of the completion of the pipe insertion. As a result, according to the connector 10 of the present embodiment, the connection work of the pipe P having the flange portion Pa can be simplified by providing a moderation feeling of the completion of the insertion of the pipe P, and the work efficiency is also increased.

  Further, in the connector 10 according to the present embodiment, the interference portion 68 at the tip of the protruding piece 66 is key-shaped and the interference portion is engaged with the flange portion Pa at the time of the elastic return. The moderation can be noticeable. Therefore, the completion of the pipe insertion due to the moderation feeling is also assured, and it is possible to promptly complete the retainer installation.

  In addition, in the connector 10 of the present embodiment, as described above, the protruding piece 66 having the interference portion 68 is provided on the stopper ring 60 that causes the sliding retraction and the rotation retraction, and the retainer 40 is half-mounted by the protruding piece 66. Since both the holding and the contact with the flange portion Pa are combined, the structure can be simplified, and further, the cost can be reduced due to the simplified shape of the molding die for molding the stopper ring 60.

  Further, in the connector 10 of this embodiment, the stopper ring 60 is incorporated on the front side of the seal member 56 inserted into the third connection hole 26 c of the housing 20. Therefore, the seal member 56 can be held by the stopper ring 60, specifically, the ring portion 62 so that the seal member 56 does not come out of the third connection hole 26 c. As a result, since it is possible to achieve the holding of the seal member 56 with the stopper ring 60 in addition to the arrangement of the protruding piece 66 for holding the retainer 40 half mounted, the number of parts is reduced, and the configuration is simplified accordingly. Assembling work can be simplified.

  In order to disconnect the pipe P from the connector 10 to which the pipe P has been connected, first, the retainer engaging claw 43 of the retainer 40 is removed from the engaging recess 28b of the housing 20, and the retainer 40 is pulled out. Next, when the pipe P is pulled, the flange portion Pa is engaged with the interference portion 68 of the protruding piece 66, and therefore, an external force on the side pulled out from the third connection hole 26c can be exerted on the stopper ring 60. Accordingly, the stopper ring 60 that has received this external force receives the guidance of the circumferential guide projection 74 by the circumferential guide groove 106 from the rotation completion position and returns to the sliding completion position while rotating in the reverse rotation direction Xb. If the piping P continues to be pulled out, the stopper ring 60 returns from the sliding completion position to the initial position along the axis of the connection hole and joins the notch 78 to the notch 104 of the ring sliding rotation guide groove 100. Furthermore, the protrusion 64 of the stopper ring 60 enters the recess 27 of the third connection hole 26c. For this reason, if the pipe P is further pulled out from this state, the projecting piece 66 is bent by the flange portion Pa, so that the pipe P can be detached from the connector 10 thereafter. When the stopper ring 60 returns to the initial position, the protruding piece 66 interferes with the right interference engagement end 44bR and the left interference engagement end 44bL, so that the retainer 40 is held in a half-mounted state. Moreover, since the stopper ring 60 can be stopped and placed at the initial position by the protrusion 64 entering the recess 27, the stopper ring 60 does not move carelessly before the pipe P is connected. Therefore, connection and removal of the piping P are also simplified.

  Next, another embodiment will be described. The connector 10A of this embodiment is characterized by a stopper ring positioning mechanism at the time of pipe connection and an engagement maintaining mechanism for maintaining the engagement between the pipe flange and the stopper ring interference section at the time of pipe removal. 16 is a perspective view showing the connector 10A in an exploded view, and FIG. 17 is a view equivalent to FIG. 3. FIG. 16 is a half sectional view of the housing 220 of the connector 10A along the pipe axial direction when the pipe is not inserted. It is explanatory drawing shown. In addition, about the member same as the connector 10 of the said Example, and the member which performs the same effect | action, the description is simplified as the same member name or code | symbol is used.

  The connector 10 </ b> A of this embodiment also includes a housing 220, a retainer 240, a seal member 56, and a stopper ring 360, similar to the connector 10. The housing 220 includes a mounting housing 222 on the front side in a cylindrical shape and connected to the tube connection portion 224. The mounting housing 222 is provided with an end flange 222a, an intermediate flange 222b, and a terminal flange 222c from the front side on the outer periphery, and a retainer 240 is mounted between the end flange 222a and the intermediate flange 222b. A mounting hole 230 is provided. FIG. 18 is an explanatory diagram showing the relationship between the state of the cut end surface of the mounting housing 222 along the line 18-18 in FIG. As shown in FIG. 18, the retainer mounting hole 230 is formed on the left and right sides of the cylindrical mounting housing 222 in the figure in the vertical direction, and a right interference engagement end 244bR (described later) of the retainer 240 and It becomes an insertion hole for the left interference engagement end 244bL. An engagement recess 231 is formed on the inner peripheral wall of the mounting housing 222 that connects the upper and lower retainer mounting holes 230 to engage the left and right interference engagement ends. That is, in this connector 10A, the retainer 240 after pipe connection is engaged and held on the inner wall side of the mounting housing 222.

  Further, even in the housing 220, multi-stage first to fourth connection holes 226a to 226d are provided in the cylinder from the rear to the front, and the first connection hole 226a is used as a flow path to the tube Tb. The two connection holes 226b are used as insertion holes for the connection portion Pb of the pipe P. The third connection hole 226c is a mounting hole for the seal member 56 and the stopper ring 360, and includes the ring sliding rotation guide groove 100 described above over a partial region of the peripheral wall, and the stopper ring 360 is arranged in the pipe axis direction. And is slidable and rotatable about the axis. The fourth connection hole 226d is a flange insertion hole in which the flange portion Pa enters as the piping P is inserted and surrounds the flange portion. That is, even in the connector 10A of this embodiment, the fourth connection hole 226d corresponds to the opening side insertion hole of the present invention, and the third connection hole 226c corresponds to the continuous insertion hole.

  As shown in FIG. 16, the retainer 240 is engaged with both ends of a curved plate-like retainer operation portion 241 that forms the top of the retainer in order to mount the retainer 240 on the housing 220 from a direction orthogonal to the axis of the fourth connection hole 226 d. A joint arm 242 is provided, and the tip thereof is a wedge-shaped right interference engagement end 244bR and a left interference engagement end 244bL. A central engagement arm 246 divided between the left and right sides is provided between the two engagement arms. Even in the retainer 240, the lower end wall shape of the central engagement arm 246 is an arc having a diameter larger than the pipe portion outer diameter PΦ of the pipe P and smaller than the outer peripheral diameter PaΦ of the flange portion Pa. When the retainer mounting is completed and the right interference engagement end 244bR and the left interference engagement end 244bL are engaged with the engagement recess 231 of the mounting housing 222 (see FIG. 18), the retainer 240 is The curved wall surface of the center engaging arm 246 is caused to interfere with the flange portion Pa to prevent the piping P from being removed.

  The stopper ring 360 in the connector 10A includes an annular ring portion 362 and a ring sliding rotation guide protrusion 370 formed so as to follow the outer periphery of the annular ring portion 362 in the same manner as the stopper ring 60 in the above embodiment. FIG. 19 is an explanatory view showing the stopper ring 360 in a partially broken perspective view, and FIG. 20 is a sectional end view taken along the line 20-20 in FIG. The ring sliding rotation guide protrusion 370 cooperates with the ring sliding rotation guide groove 100 in the third connection hole 226c of the housing 220 in the same manner as the ring sliding rotation guide protrusion 70 in the stopper ring 60 described above. As described above, the stopper ring 360 slides and rotates in the axial direction (forward / reverse rotation: see FIG. 13). Since this point is the same as the previous embodiment, the description thereof is omitted.

  Unlike the stopper ring 60 described above, the stopper ring 360 has two protruding pieces 366 having an equal pitch extending from the outer peripheral wall of the ring portion 362, and an interference portion 368 at the tip thereof is protruded from the flange 363. A notch 364 is formed at the base of the protruding piece 366 by notching the outer peripheral wall of the ring part 362 together with the flange 363. Even in the stopper ring 360, when incorporated in the third connection hole 226c of the housing 220, the projecting piece 366 is positioned in and opposed to the fourth connection hole 226d, and within the fourth connection hole 226d. It extends along the axis of the connection hole. The interference portion 368 interferes with the right interference engagement end 244bR and the left interference engagement end 244bL of the left and right engagement arms 242 in the retainer 240 attached to the housing 220, and prevents the retainer 240 from being completely attached.

  In addition, the stopper ring 360 has an inclined surface 367 at one end of the pipe guide hole 369, and includes convex portions 380 that protrude in the outer diameter direction at an equal pitch on the outer peripheral wall of the flange 363. The convex portion 380 cooperates with the housing 220 in the positioning of the stopper ring 360 as follows. FIG. 21 is an explanatory diagram showing a perspective view of the main part of the front end of the housing involved in positioning the stopper ring. FIG. 22 is an enlarged view of the main part of the housing 220 and the stopper ring 360 taken along line 22-22 in FIG. It is explanatory drawing to do.

  The housing 220 includes an elastic piece 250 in the mounting housing 222 as a part related to the positioning of the stopper ring. This bullet piece 250 is located on the end side of the retainer mounting hole 230 on the right side in FIG. 21, and a part of the peripheral wall of the mounting casing 222 is formed thin, and can be bulleted in the outer diameter direction. is there. And the bullet piece 250 is equipped with the 1st convex part 251 and the 2nd convex part 252 along the housing axis line in the inner peripheral wall side, and makes the recessed part 254 between both convex parts. In this case, with respect to the first convex portion 251, the fourth connecting hole 226d side is a first inclined surface 251a with a gentle inclination, and the concave portion 254 side is a second inclined surface 251b with a large inclination. On the other hand, the convex portion 380 of the stopper ring 360 includes a top portion 382 that swells on the ring portion 362 side. FIG. 22 shows a state immediately before the stopper ring 360 is mounted. From this state, when the stopper ring 360 moves further to the right in the drawing so as to enter the third connection hole 226c, the stopper ring 360 is The projecting piece 250 is bent in the outer diameter direction by the top portion 382, and the projecting part 380 enters the recessed part 254 after the projecting return of the projecting piece 250, and is engaged with the projecting piece 250. As a result, the stopper ring 360 is positioned, and this positioned state is a state in which the stopper ring 360 is completely mounted, that is, an initial state in which the retainer 240 is semi-mounted and held, and ready for connection of the pipe P. The stopper ring 360 takes the initial position described above. As described above, it is possible to provide a plurality of the projecting pieces 250 related to the positioning of the stopper ring 360, and to provide the convex portions 380 on the stopper ring 360 corresponding to the respective projecting pieces 250. As described above, the pipe P is inserted into the stopper ring 360 set to the initial position as described above.

  With the insertion of the pipe P, the stopper ring 360 is connected to the third connection while rotating in the axial direction by the ring sliding rotation guide protrusion 370 and the ring sliding rotation guide groove 100 in the same manner as the stopper ring 60. Retreat to the back side of the hole 226c. The projection 380 moves in the axial direction along with such sliding and rotation, but a recess is formed in the inner peripheral wall of the mounting housing 222 so as not to interfere with the moving projection 380. As shown in FIG. 19, the stopper ring 360 places the two convex portions 380 in a diagonal positional relationship. Therefore, as shown in FIG. 21, the stopper ring 360 is formed on the inner peripheral wall of the mounting housing 222 on the side facing the elastic piece 250. Is formed with a recess 254 into which the protrusion 380 enters. The interference with the convex portion 380 in the concave portion 254 of the mounting housing 222 is solved by deeply sweeping the inner peripheral wall of the housing on the back side of the concave portion 254. Further, when the stopper ring 360 is mounted on the housing 220, a recess 256 is formed on the inner peripheral wall of the mounting housing 222 from the opening side in order to avoid interference with the convex portion 380.

  Next, connection and removal of the pipe P in the connector 10A will be described in relation to the engagement between the flange part Pa of the pipe P and the interference part 368 of the stopper ring 360. FIG. 23 is an explanatory view showing the state of insertion of the pipe P in a front view and a cross-sectional view of the main part of the connector 10A, and FIG. 24 is an explanatory view showing the state of removal of the pipe P in a front view and a cross-sectional view of the main part. FIG. As described above, the stopper ring 360 is retracted while rotating to the back side of the third connection hole 226c with the insertion of the pipe P. However, in the above figure, the rotation of the stopper ring 360 is changed to the rotation of the housing 220. It is shown as a replacement. Further, since the sliding and rotating operations in the axial direction of the stopper ring 360 are the same as in the previous embodiment, the description thereof will be omitted, and the transition of the engaged state with the flange portion Pa will be mainly described.

  In a state where the pipe P is not inserted, the stopper ring 360 is in the above-described initial position where the convex portion 380 is engaged with the concave portion 254 of the elastic piece 250, and the protruding piece 366 is connected to the fourth connection hole 226 d of the housing 220. It is located on the left and right inside. Before the pipe is inserted, the connector 10A causes the interference interference portion 368 of the protruding piece 366 to interfere with the right interference engagement end 244bR and the left interference engagement end 244bL of the retainer 240 that has entered the fourth connection hole 226d. The retainer 240 is held in a semi-mounted state.

  In this way, with the retainer 240 half-mounted, the pipe P is inserted into the fourth connection hole 226d from the connection portion Pb side. First, as described above, the pipe P passes through the fourth connection hole 226d without interfering with the right interference engagement end 244bR and the left interference engagement end 244bL in the semi-mounted retainer 240, and the connection portion Pb It is inserted until it enters the second connection hole 226b beyond the pipe guide hole 369 and the seal member 56 of the ring part 362 (FIG. 23A). In this state, as in the previous embodiment, the stopper ring 360 can start retraction as described above, which is guided by the ring sliding rotation guide protrusion 370 and the ring sliding rotation guide groove 100 of the housing 220. .

  As the pipe is inserted, the flange portion Pa of the pipe P interferes with the interference portion 368 at the tip of the protruding piece 366, and the stopper ring 360 remains at the initial position due to the engagement between the convex portion 380 and the elastic piece 250. The pipe P tries to cause pressing of the stopper ring 360 via the interference portion 368 and bending of the protruding piece 366 in the pipe radial direction by further pipe insertion. Since the interference of the flange portion Pa with the interference portion 368 occurs from the longitudinal direction of the protruding piece with respect to the protruding piece 366, the pipe P causes the stopper ring 360 to be pressed via the interference portion 368. As a result, the stopper ring 360 receives an external force in the axial direction through the flange portion Pa due to the pipe insertion after the interference of the flange portion Pa to the interference portion 368, in the same manner as in the previous embodiment. As shown in FIG. 23B, the right side interference in the retainer 240 is caused by causing sliding retraction and rotation retraction (see FIG. 13) along the axial direction of the third connection hole 26c to retreat to the rotation completion position. The interference between the engagement end 244bR and the left interference engagement end 244bL is released.

  By inserting the pipe after the stopper ring 360 has been retracted to the rotation completion position in this way, as shown in FIG. 23C, the flange part Pa temporarily curves the protruding piece 366 in the pipe radial direction so as to exceed the interference part 368, When the flange part Pa gets over the interference part 368, the protruding piece 366 is elastically restored so that the interference part 368 engages with the outer edge of the flange part Pa. In this case, the protruding piece 366 is constrained by the inner peripheral wall of the third connection hole 226c to the middle of the protruding piece 366 as well as the base side on the base side, that is, the bottom side of the notch 364, although the restricting range is wide. Since the external force exerted by the flange portion Pa with the insertion of the pipe is large, the flange portion Pa returns after being repelled as described above in the gap with the inner peripheral wall of the fourth connection hole 226d. By the elastic return of the protruding piece 366, the flange portion Pa of the pipe P is integrated with the stopper ring 360 through the engagement with the interference portion 368, and the operator is given a sense of moderation when the insertion of the pipe P is completed. To do. Upon completion of the insertion of the pipe (completion of connection), the retainer 240 is further pushed from the half-mounted state and is mounted on the housing 220. As shown in FIG. The engagement recess 231 is engaged. By such retainer mounting, the pipe P is prevented from being pulled out by the flange portion Pa interfering with the curved curved surface of the central engagement arm 246, and the connection portion Pb is sealed by the seal member 56 and then connected to the tube Tb by the connector 10A. Is done.

  The removal of the pipe P is as follows. First, prior to removing the pipe, the retainer 240 is disengaged and the retainer 240 is lifted to the half-mounted position. Specifically, a tool or the like is inserted from below the upper and lower retainer mounting holes 230 shown in FIG. 18 to engage the engagement recess 231 with the left interference engagement end 244bL and the right interference engagement end 244bR. Unwind and push the retainer 240 up to the half-mounted position. Thereafter, when a drawing operation is applied to the pipe P in the connection completed state shown in FIG. 23C, the pipe P engages the flange portion Pa with the interference portion 368 as shown in FIG. It moves with the stopper ring 360 as it is. In this case, the stopper ring 360 is rotated and slid by the ring sliding rotation guide protrusion 370 and the ring sliding rotation guide groove 100 of the housing 220.

  During the transition from the connection completion state shown in FIG. 23 (C) to the pipe extraction state shown in FIG. 24 (A), the protruding piece 366 is not only the base on the bottom side of the notch 364 but also the middle of the protruding piece 366. It is restrained by the inner peripheral wall of the third connection hole 226c in a wide range up to. On the other hand, since the force accompanying the pulling of the pipe P is converted to the rotation and sliding of the stopper ring 360 as described above, the protruding piece 366 cannot be bent when the pipe is pulled out. The integral form of P and the stopper ring 360, that is, the engaged state of the interference portion 368 and the flange portion Pa is maintained.

  When the pipe is further pulled out from the state shown in FIG. 24A, the stopper ring 360 engages the convex portion 380 with the concave portion 254 of the elastic piece 250 in the housing 220 and returns to the above-described initial position. . In the state of returning to the initial position shown in FIG. 24B, the stopper ring 360 is stopped at the initial position by the engagement of the convex portion 380 and the concave portion 254, and the protruding piece 366 by the inner peripheral wall of the third connection hole 226c is The restraint range becomes narrower. For this reason, the piping P is pulled out from the fourth connection hole 226d of the housing 220 by temporarily bending the protruding piece 366 in the piping radial direction at the flange portion Pa by the subsequent piping drawing. Since the protruding piece 366 is resiliently restored by such pulling out of the pipe, the connector 10A causes the right interference engaging end 244bR and the left interference engaging end 244bL of the retainer 240 to interfere with the interference portion 368 of the protruding piece 366. The retainer 240 is held in a semi-mounted state.

  As described above, the connector 10A according to the present embodiment can achieve the same advantages as the connector 10 according to the above-described embodiment, and has the following advantages. First, in the connector 10A, a convex portion 380 is provided on the stopper ring 360, and on the housing 220 side, a concave portion 254 with which the convex portion 380 engages with the elastic piece 250 is provided. When the stopper ring 360 is attached to the housing 220 in preparation for pipe insertion, the stopper ring 360 is positioned at the initial position described above by the engagement between the convex portion 380 and the concave portion 254 and is stopped at the initial position. be able to. In the initial position where the stopper ring 360 is stopped in this way, the retainer 240 is half-mounted by the protruding piece 366 and the interference portion 368. Therefore, in the connector 10A, the stopper ring 360 may be moved inadvertently when the pipe is connected. You can avoid that. The same applies to the piping drawing. Therefore, according to the connector 10A of the said Example, the connection and removal of the piping P become easy.

  Further, in the connector 10A, the concave portion 254 is formed by arranging the first convex portion 251 and the second convex portion 252 side by side along the housing axis in the elastic piece 250, and the concave shape of the concave portion 254 enters the top portion 382 of the convex portion 380. Shaped. For this reason, the convex part 380 and the concave part 254 can be engaged with high effectiveness, and the stopper ring 360 can be more reliably stopped at the initial position. Moreover, since the inclination of the second inclined surface 251b on the back side of the concave portion 254 that engages with the convex portion 380 is increased, the engagement between the convex portion 380 and the concave portion 254 is ensured, and the holding effect of the stopper ring 360 at the initial position is ensured. Will increase. In addition, when the pipe is pulled out, the flange portion Pa moves following the first inclined surface 251a to bend the elastic piece 250, but the elastic piece 250 gradually increases by the small inclination of the first inclined surface 251a. It bends reliably and easily.

  Further, when the protruding piece 366 in the stopper ring 360 is provided with a notch 364 and extends from the outer peripheral wall of the ring portion 362, and the stopper ring 360 is in the initial position, the inner peripheral wall of the third connection hole 226c The restriction range of the projecting piece 366 is narrowed to allow the projecting piece 366 to be elastic. The stopper ring 360 is retracted from the initial position to the back side of the third connection hole 226c by the pipe insertion accompanying the pipe connection, and the third connection hole is returned while the stopper ring 360 is returned to the initial position by the subsequent pipe drawing. The restricting range of the protruding piece 366 by the inner peripheral wall of 226c is widened so that the protruding piece 366 does not spring. For this reason, since the engagement state between the flange portion Pa of the pipe P and the interference portion 368 of the stopper ring 360 can be maintained until the initial position is restored, only the pipe P is inadvertently dropped and the stopper ring 360 is removed. A situation where the original position (initial position) is not returned can be prevented. In other words, since the stopper ring 360 is repeatedly returned to the initial position when the pipe P is removed, the pipe P can be inserted into the stopper ring 360 at the initial position at the time of the next pipe connection. . Therefore, piping connection is simple and workability is enhanced.

  As mentioned above, although the Example of this invention was described, this invention is not limited to the said Example, In the range which does not deviate from the summary, it is possible to implement in various aspects. For example, in the above embodiment, the pipe P provided with the flange portion Pa over the entire circumference of the pipe has been described. However, the range in which the left and right engaging arms 44 of the retainer 40 cause interference with the central engaging arm 46 and the protruding piece 66 are described. It is also possible to use a pipe having at least a flange shape with respect to the range in contact with the interference portion 68.

  In the above-described embodiment, when the stopper ring 60 is retracted to the back side of the third connection hole 26c, sliding retraction and rotation retreat in the axial direction of the connection hole are caused, but only sliding retraction is performed. It is also possible to adopt a configuration that raises or a configuration that only causes retraction.

  Further, an interference portion 68 is provided on the protruding piece 66 of the stopper ring 60 so that the protruding piece 66 interferes with the left and right engaging arms 44 and the central engaging arm 46 for holding the retainer half, and slides and retracts. An external force is transmitted from the flange portion Pa to the stopper ring 60 for causing the rotation retreat. As other configurations, the protruding piece 66 is provided only for the interference between the left and right engaging arms 44 and the central engaging arm 46 for holding the retainer half mounted, and the other protruding pieces are provided on the stopper ring 60 and the other. It is also possible to transmit external force from the flange portion Pa to the stopper ring 60 by the protruding piece.

DESCRIPTION OF SYMBOLS 10, 10A ... Connector 20 ... Housing 22 ... Mounting housing 24 ... Tube connection part 26a ... 1st connection hole 26b ... 2nd connection hole 26c ... 3rd connection hole 26d ... 4th connection hole 27 ... Concave 28 ... Guide groove 28b ... engaging recess 29 ... retainer mounting groove 30 ... retainer mounting hole 40 ... retainer 41 ... retainer operation part 42 ... engaging arm 43 ... retainer engaging claw 44 ... left and right engaging arm 44bL ... left interference engaging end 44bR ... Right interference engagement end 45 ... Notch 46 ... Center engagement arm 48 ... Arc peripheral edge 49 ... Arc peripheral edge 56 ... Seal member 60 ... Stopper ring 62 ... Ring portion 63 ... Flange 64 ... Round 66 ... Projection piece 67 ... Piping Tip guide hole 68 ... Interference part 69 ... Pipe guide hole 70 ... Ring sliding rotation guide protrusion 72 ... Axial direction guide protrusion 74 ... Circumferential guide protrusion 76 ... Termination part 78 ... Notch 1 DESCRIPTION OF SYMBOLS 0 ... Ring sliding rotation guide groove 102 ... Axial direction edge 104 ... Notch part 106 ... Circumferential direction guide groove 106a ... Back side wall surface 108 ... Extended inclination groove 220 ... Housing 222 ... Mounting housing 222a ... End flange 222b ... Middle Flange 222c ... Terminal flange 224 ... Tube connection portion 226a ... First connection hole 226b ... Second connection hole 226c ... Third connection hole 226d ... Fourth connection hole 230 ... Retainer mounting hole 231 ... Engaging recess 240 ... Retainer 241 ... Retainer operation part 242 ... engagement arm 244bL ... left interference engagement end 244bR ... right interference engagement end 246 ... center engagement arm 250 ... bullet piece 251 ... first convex part 251a ... first inclined surface 251b ... first 2 inclined surface 252 ... 2nd convex part 254 ... recessed part 256 ... recessed part 360 ... stopper ring 362 ... ring part 363 ... flange 64 ... cutout 366 ... projecting piece 367 ... inclined surface 368 ... interference portion 369 ... pipe guide holes 370 ... ring sliding rotation guide protrusions 380 ... protrusions 382 ... apex P ... pipe Pa ... flange portion Pb ... connecting portion Tb ... Tube

Claims (9)

A connector used to connect a pipe having an annular protrusion on the outer periphery,
A housing having an opening side insertion hole surrounding the annular protrusion and a continuous insertion hole provided continuously to the opening side insertion hole;
A retainer that is attached to the housing and has an engagement portion provided so as to enter the opening-side insertion hole and interferes with the annular protrusion inside the opening-side insertion hole to prevent the pipe from being removed;
When the pipe is not inserted, the retainer is held in a semi-attached state by interfering with the engaging portion of the retainer and preventing the retainer from being completely attached. A semi-attachment holding part,
A protrusion abutting portion disposed inside the opening-side insertion hole and contacting the annular protrusion that has entered the opening-side insertion hole;
A tube that includes the protrusion abutting portion and the semi-attachment holding portion at one end, and is inserted into the continuous insertion hole so that the protrusion contact portion and the semi-attachment holding portion are positioned inside the opening-side insertion hole. Body,
When the tubular body inserted into the continuous insertion hole receives an external force on the side of the continuous insertion hole along the axial center of the continuous insertion hole, the external force causes the tubular body to be inserted into the continuous insertion hole. A retracting engagement portion for engaging the tubular body with the continuous insertion hole so as to be retractable toward the back side;
The retracting engagement portion is
When the annular projection reaches an insertion completion position exceeding the engagement portion while the tubular body is retracted by the external force exerted by the annular projection abutting on the projection abutting portion, the half-mounting holding portion and the engagement portion are engaged. A connector that moves the semi-attached holding portion toward the continuous insertion hole by retracting the tubular body until the interference with the joint portion is released. The connector according to claim 1,
The retracting engagement portion is
When the tubular body is slid toward the inner side of the continuous insertion hole while rotating the tubular body around the axis by the external force, the tubular body is retracted, and the annular protrusion reaches the insertion completion position. A connector that moves the half-mounting holding portion toward the continuous insertion hole until the interference between the half-mounting holding portion and the engaging portion is released by rotation and sliding of the tubular body. The connector according to claim 1 or 2, wherein
The protrusion abutting portion is a plate-shaped elastic piece extending along the axis inside the opening-side insertion hole, and extends in the pipe radial direction by the annular protrusion after contacting the annular protrusion. A connector that bends and rebounds and engages with the annular protrusion when the annular protrusion reaches the insertion completion position.   The connector according to claim 3, wherein the protrusion abutting portion is an engaging portion that engages the tip of the elastic piece with the annular protrusion.   The connector according to claim 1, wherein the half-mounting holding portion also serves as the protrusion abutting portion. The connector according to any one of claims 1 to 5,
A seal member that is disposed in the continuous insertion hole and seals an outer periphery of a pipe line portion on a distal end side of the inserted pipe;
A connector for holding the seal member in the continuous insertion hole by the tubular body. The connector according to any one of claims 1 to 6,
The tubular body includes a convex portion protruding toward the outer diameter direction,
The housing includes a recess for positioning the tubular body by causing the protrusion to enter when the retainer is held in a semi-mounted state by the semi-mounted holding section of the tubular body. .   8. The housing according to claim 7, wherein the housing includes a projecting piece that can be repelled in an outer diameter direction, and the first projecting section and the second projecting section are arranged on the projecting section along the axis of the housing. The connector described. The connector according to any one of claims 3 to 8,
In the housing, the engagement state of the projection abutting portion that has engaged with the annular projection by causing the bullet return is changed from the bullet return position where the tubular body has caused the bullet return to the continuous insertion hole. A connector comprising an engagement maintaining mechanism for maintaining until retracting to the bullet return position after retreating toward the back side of the connector.

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