JP2010270867A - Quick connector and pipe connecting structure - Google Patents

Quick connector and pipe connecting structure Download PDF

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Publication number
JP2010270867A
JP2010270867A JP2009124648A JP2009124648A JP2010270867A JP 2010270867 A JP2010270867 A JP 2010270867A JP 2009124648 A JP2009124648 A JP 2009124648A JP 2009124648 A JP2009124648 A JP 2009124648A JP 2010270867 A JP2010270867 A JP 2010270867A
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JP
Japan
Prior art keywords
portion
retainer
quick connector
side
engagement
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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JP2009124648A
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Japanese (ja)
Inventor
Kazushige Sakazaki
Takahiro Shibata
Hiroshi Yamada
一茂 坂崎
裕志 山田
孝広 柴田
Original Assignee
Tokai Rubber Ind Ltd
東海ゴム工業株式会社
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Publication date
Application filed by Tokai Rubber Ind Ltd, 東海ゴム工業株式会社 filed Critical Tokai Rubber Ind Ltd
Priority to JP2009124648A priority Critical patent/JP2010270867A/en
Publication of JP2010270867A publication Critical patent/JP2010270867A/en
Application status is Pending legal-status Critical

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00Couplings of the quick-acting type
    • F16L37/08Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/12Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
    • F16L37/14Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain
    • F16L37/142Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain where the securing element is inserted tangentially
    • F16L37/144Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain where the securing element is inserted tangentially the securing element being U-shaped
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2201/00Special arrangements for pipe couplings
    • F16L2201/10Indicators for correct coupling

Abstract

A quick connector having a retainer having a connection confirmation function is provided.
A retainer 5 is formed of a connecting portion 97 and a pair of elastic leg portions 99 formed at both ends of the connecting portion 97, respectively. A confirmation retaining portion 101 is provided so as to extend radially inward from an intermediate portion in the width direction on the inner surface of the connecting portion 97 and the other side in the length direction. In addition, a pair of clamp arms 105 is provided so that the outer peripheral surface of the pipe body 33 can be sandwiched between the inner end portions of the confirmation retaining portions 101. An engaging portion 111 protruding inward is formed at the tip of the elastic leg 99.
[Selection] Figure 1

Description

  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.

  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.

  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.

  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.

Japanese Patent Laid-Open No. 11-344182 JP 2003-254484 A

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

It is a disassembled perspective view of the 1st quick connector which concerns on this invention. It is sectional drawing of the connector housing of a 1st quick connector. It is a perspective view of the retainer of the 1st quick connector. It is a perspective view of the 1st quick connector with which the retainer was attached. It is sectional drawing of the 1st quick connector with which the retainer was attached. It is another sectional view of the 1st quick connector with which the retainer was attached. 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. 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). It is a perspective view which shows a 1st piping connection structure. It is a disassembled perspective view of the 2nd quick connector which concerns on this invention. It is sectional drawing of the connector housing of a 2nd quick connector. It is a perspective view of the retainer of the 2nd quick connector. It is a perspective view of the 2nd quick connector with which the retainer was attached. It is sectional drawing of the 2nd quick connector with which the retainer was attached. It is another sectional view of the 2nd quick connector with which the retainer was attached. 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. 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). It is a perspective view which shows the 2nd piping connection structure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A first quick connector according to the present invention will be described with reference to FIGS.

  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.

  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).

  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.

  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.

  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.

  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).

  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.

  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.

  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.

  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.

  7 and 8 are views for explaining the operation mode of the retainer 5.

  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).

  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.

  A second quick connector according to the present invention will be described with reference to FIGS.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  16 and 17 are diagrams for explaining the operation mode of the retainer 133.

  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).

  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.

  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.

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 (7)

  1. 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.
  2.   The quick connector according to claim 1, wherein the engaging portion is formed at a distal end portion of the elastic leg portion.
  3.   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.
  4.   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.   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.
  6.   The quick connector according to claim 2, wherein the retainer has a cover portion that covers the elastic leg portion.
  7. 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.
JP2009124648A 2009-05-22 2009-05-22 Quick connector and pipe connecting structure Pending JP2010270867A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009124648A JP2010270867A (en) 2009-05-22 2009-05-22 Quick connector and pipe connecting structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009124648A JP2010270867A (en) 2009-05-22 2009-05-22 Quick connector and pipe connecting structure

Publications (1)

Publication Number Publication Date
JP2010270867A true JP2010270867A (en) 2010-12-02

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Country Link
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011068052A1 (en) * 2009-12-01 2011-06-09 ニッタ株式会社 Pipe joint and retainer
WO2011105234A1 (en) * 2010-02-23 2011-09-01 株式会社ニフコ Connector
JP2013127265A (en) * 2011-12-16 2013-06-27 Takagi Co Ltd Joint
JP2013204793A (en) * 2012-03-29 2013-10-07 Takagi Co Ltd Joint
JP2014214876A (en) * 2013-04-23 2014-11-17 ティ・アイ・オートモーティヴ(フルダブリュック)・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Coupler
CN105090641A (en) * 2014-05-22 2015-11-25 A·雷蒙德公司 Tubular coupling
CN107061897A (en) * 2015-11-20 2017-08-18 A·雷蒙德公司 With the safe pipe joint connected automatically

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US5405175A (en) * 1993-09-24 1995-04-11 Siemens Automotive L.P. Clip attachment of fuel tube to fuel rail
US5964483A (en) * 1997-11-19 1999-10-12 Dayco Products, Inc. Fluid coupling assembly, locking member therefor, and method of assembly
JP2002276878A (en) * 2001-01-15 2002-09-25 Sanoh Industrial Co Ltd Joint for piping
JP2004060884A (en) * 2002-06-04 2004-02-26 Piolax Inc Connector with check function built therein
US6908119B2 (en) * 2002-09-26 2005-06-21 Lewis-Goetz And Company, Inc. Detachable hose coupling with an improved female and male coupling having an interlocking U-shaped staple
JP2005172161A (en) * 2003-12-12 2005-06-30 Sanoh Industrial Co Ltd Quick connector
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011068052A1 (en) * 2009-12-01 2011-06-09 ニッタ株式会社 Pipe joint and retainer
WO2011105234A1 (en) * 2010-02-23 2011-09-01 株式会社ニフコ Connector
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JP2013127265A (en) * 2011-12-16 2013-06-27 Takagi Co Ltd Joint
JP2013204793A (en) * 2012-03-29 2013-10-07 Takagi Co Ltd Joint
JP2014214876A (en) * 2013-04-23 2014-11-17 ティ・アイ・オートモーティヴ(フルダブリュック)・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Coupler
CN105090641A (en) * 2014-05-22 2015-11-25 A·雷蒙德公司 Tubular coupling
US10047889B2 (en) 2014-05-22 2018-08-14 A. Raymond Et Cie Tubular connector with an automatic connection
CN107061897A (en) * 2015-11-20 2017-08-18 A·雷蒙德公司 With the safe pipe joint connected automatically
CN107061897B (en) * 2015-11-20 2019-06-25 A·雷蒙德公司 With the safe pipe fitting connected automatically

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