JP5579027B2 - Female pipe joint member and pipe joint - Google Patents

Description

  The present invention relates to a female pipe joint member of a pipe joint, and in particular, engages with a male pipe joint member inserted into the female pipe joint member to lock the male pipe joint member (that is, a female mold). A locking element that is radially displaceable for fixing to the tubular pipe joint and a female pipe fitting member that is provided on the outer peripheral surface of the female pipe fitting member and holds the locking element at a position for locking the male pipe fitting member. A sleeve that is displaceable in the axial direction between a locking holding position and an unlocking allowable position that permits unlocking of the locking element (that is, release of fixation of the male pipe joint member to the female tubular pipe joint); And a pipe joint provided with the female pipe joint member.

  For this type of female pipe joint member, various means have been developed for preventing the sleeve in the locked holding position from being inadvertently displaced to the unlockable position.

  In one example, a protrusion (sleeve displacement prevention member) adjacent to one end edge of the sleeve that is in the locking holding position is provided on the outer peripheral surface of the female pipe joint member, and the sleeve moves toward the unlocking allowable position. Even in this case, the one end edge of the sleeve is locked by the protrusion, and a concave portion extending in the axial direction is provided at a predetermined position in the circumferential direction of the one end edge of the sleeve, and the sleeve is formed by the concave portion. Only when the projection is aligned with the projection in the axial direction, the concave portion receives the projection so that the sleeve can move in the axial direction toward the unlocking allowable position (see Patent Document 1). ).

  In this case, the projection is generally formed by embedding a ball or implanting a pin in the outer peripheral surface of the female pipe joint member. For this reason, there exists a possibility that these protrusions may come off. In addition, foreign materials such as facets are likely to enter the recess, which may hinder the operation.

  As another example, a sleeve displacement prevention member that is displaceable in the radial direction is provided on the female pipe joint member, and the sleeve displacement prevention member is engaged with one end edge of the sleeve that is about to move toward the unlocking allowable position. In addition, the sleeve is prevented from moving, and when the sleeve is brought into the unlocking allowable position, the operator manually pushes the sleeve displacement preventing member radially inward so that the sleeve can be displaced. There are some (see Patent Documents 2 to 4).

  In this type, when the sleeve is moved to the unlocking allowable position, the sleeve displacement prevention member must be moved by a hand different from the hand that moves the sleeve, which complicates the operation.

51-69119 JP 10-185056 A JP 11-37370 A JP 2000-249280 A

  In view of the above, the present invention eliminates the possibility that the sleeve displacement prevention member will come off even if it is used for a long time, and can easily perform work when the sleeve is displaced to the unlocking allowable position. It aims at providing a joint member and a pipe joint provided with the same.

That is, the present invention
A tubular female joint main body for receiving a male pipe joint member, the female having a first surface continuously provided in the circumferential direction on the outer peripheral surface, and a second surface having a smaller radius than the first surface Mold fitting body,
A locking element that is mounted on a female joint body so as to be displaceable in a radial direction, and engages with a male pipe joint member inserted into the female joint body to lock the male pipe joint member. A lock element that is displaceable between a radially inner position of and a radially outer position for unlocking the male fitting member;
An unlocking position provided on the outer peripheral surface of the female joint main body and allowing the locking element to be displaced to the radially outer position, and a locking holding position for holding the locking element at the radially inner position. A sleeve that is displaceable in the axial direction of the female joint body between the allowable positions;
A sleeve displacement prevention member provided on the sleeve, slidable with the outer peripheral surface of the female joint body, and pressed against the outer peripheral surface by a spring biasing force;
The locking portion provided on the female joint main body and the sleeve are rotatable in the circumferential direction at a position closer to the unlocking permitted position than the sleeve displacement preventing member when the sleeve is in the locking holding position. ,
When the sleeve in the locked holding position is rotated in the circumferential direction with respect to the female joint body, the sleeve displacement prevention member is engaged with the first surface by the spring biasing force. The first shape becomes a second shape by engaging with the second surface, and the sleeve displacement prevention member becomes one of the first shape and the second shape by rotating. It is possible to engage with the engaging portion provided in the female joint main body in the axial direction, thereby preventing the sleeve from being displaced in the axial direction from the locking holding position to the unlocking allowable position. A female pipe joint member is provided.

  In this female pipe joint member, a sleeve displacement prevention member is attached to the sleeve itself, and the sleeve displacement prevention member is operated by rotating the sleeve. Therefore, the operation of the sleeve displacement prevention member is facilitated as compared with the conventional female pipe joint member described second above. In the above, “the radius of the second surface is smaller than that of the first surface” means that the distance from the axis of the female joint member of the second surface is smaller than that of the first surface. It does not necessarily mean that these surfaces are arcuate.

As a concrete example,
The locking portion is provided to extend radially outward from the outer peripheral surface of the female pipe joint member;
The sleeve displacement prevention member has a portion that protrudes radially outward from the sleeve in the first shape, and when the sleeve is about to be displaced in the axial direction from the locking holding position to the unlocking allowable position. In addition, the displacement of the sleeve can be prevented by the portion being locked to the locking portion.

  More specifically, the locking portion is constituted by a cylindrical member fixed concentrically with the female joint body on the outer peripheral surface of the female joint body, and the tubular member is configured to prevent the sleeve from being displaced. An inner diameter for receiving the sleeve that is displaced from the locking holding position to the unlocking allowable position when the member is in the second shape; and when the member is in the first shape, The sleeve is displaced by engaging with the portion of the sleeve displacement prevention member protruding radially outward from the sleeve that is displaced to the unlocking allowable position.

  In these specific examples, in a state in which a part of the sleeve displacement preventing member protrudes radially outward from the sleeve, the sleeve can be engaged with the locking portion and the sleeve can be prevented from moving in the axial direction. .

As another specific example,
The outer peripheral surface of the female joint body that slides with the sleeve displacement prevention member when the sleeve is rotated in the circumferential direction when in the locked holding position is a circumferential surface as a whole. The surface has a surface extending in a planar shape that forms a chord with respect to the circumferential surface, and the circumferential surface is the first surface and the planar surface is the second surface. be able to.

In this case, the sleeve displacement prevention member is coiled around an axis extending in a direction parallel to the axis of the female joint body, and is set in an opening formed to penetrate the sleeve in the radial direction. And a coil part that is set to protrude radially outward from the opening, and the coil part from the both ends of the coil part into the sleeve so as to be separated from each other in the axial direction. And is formed from a spring material having both ends extending so as to contact the circumferential surface of the first surface of the outer surface of the female joint body in a tangential direction, and the sleeve is unlocked from the lock holding position. The displacement of the sleeve is caused by the portion of the coil portion set so as to protrude radially outward from the opening when the displacement to the allowable position is attempted in the axial direction. Was to prevent
When the sleeve is rotated so that both end portions of the coil are engaged with the second surface, the sleeve displacement preventing member is deformed into the second shape and the part of the coil portion is Can be drawn into the opening of the sleeve.
That is, the sleeve displacement prevention member is formed in a torsion spring shape with a spring material, and both ends thereof are set to extend inside the sleeve to which the sleeve displacement prevention member is attached. The possibility that the sleeve displacement prevention member is detached from the sleeve can be reduced.

  As another form, the sleeve displacement prevention member is provided with a sliding pin provided in a radially slidable manner in an opening formed so as to penetrate the sleeve in the radial direction, and the sliding pin, A spring member provided between the sleeve and biasing the sliding pin radially inward so that the sliding pin is slidably engaged with the outer peripheral surface of the female joint body; When the sliding pin is in a position to engage with the first surface, the sliding pin is pushed out against the spring biasing force, and a part protrudes radially outward from the opening. When the sleeve is about to be displaced in the axial direction from the locking holding position to the unlocking allowable position, the part is locked to the locking portion so as to prevent the sleeve from being displaced. And when it is in a position to engage with the second surface, the part is opened. It is possible to be drawn in to the inside.

  In the above specific example, the locking portion that engages with the sleeve displacement prevention member and prevents the displacement of the sleeve extends outward from the outer peripheral surface of the female joint body. Can be. The outer peripheral surface of the female joint body that slides with the sleeve displacement prevention member when the sleeve is displaced in the circumferential direction when in the lock holding position is generally a circumferential surface, and the circumferential surface A planarly extending surface that forms a string with respect to the circumferential surface, and radially outward from an edge that extends in the direction of forming the string on the unlocking position side of the sleeve of the planarly extending surface A concave portion having a side surface that extends to form the locking portion, the plane extending in the planar shape forms the second surface, and the circumferential surfaces in the circumferential direction of the plane form the first surface. The sleeve displacement preventing member is engaged with the planarly extending surface to form the second shape and engageable with the side surface as the locking portion, so that the sleeve is disengaged from the lock holding position. Displacement in the axial direction to the unlocking allowable position can be prevented.

  In short, in this embodiment, when the sleeve displacement preventing member is deformed so as to be displaced inward in the radial direction, the sleeve displacement preventing member is engaged with the locking portion.

Specifically, the sleeve displacement prevention member is wound in a coil shape around an axis extending in a direction parallel to the axis of the female joint body, and is formed in an opening formed so as to penetrate the sleeve in the radial direction. And the coil portion extending from both ends of the coil portion into the sleeve so as to be separated from each other when viewed in the axial direction thereof, and the first outer peripheral surface of the female joint body Formed from a spring material having both ends extending to contact the surface in a tangential direction,
The sleeve displacement preventing member can be deformed to the second shape when the sleeve is rotated so that both end portions of the coil are engaged with the second surface.

  In the female pipe joint member in which the circumferential surface is the first surface and the planar surface is the second surface, the planar surface extending from the circumferential surface to form the string is the string. And has a step portion on one end side in the extending direction so as to be connected to the circumferential surface via the step portion. When the provided sleeve displacement prevention member enters the surface extending in the planar shape from the other end side, the sleeve displacement prevention member can be locked by the step portion to prevent the sleeve from rotating.

  By doing in this way, it can be set as the position where a sleeve displacement prevention member engages reliably with the field which extends in the shape of a plane which is the 2nd surface.

  The present invention is also a female pipe joint member as described above, and a male pipe joint member that is slidably inserted into the through hole of the female pipe joint member. There is also provided a pipe fitting having a male fitting member having an annular recess for receiving the lock when the lock is in the radial position.

  Embodiments of a female pipe joint member and a pipe joint including the same according to the present invention will be described below with reference to the accompanying drawings.

It is a longitudinal cross-sectional view of the pipe joint provided with the female pipe joint member which concerns on the 1st Embodiment of this invention, and the state which a sleeve displacement prevention member is not latched by the latching | locking part provided in the female joint main body is shown. It is a longitudinal cross-sectional view of the female pipe joint member of FIG. 1, and shows a state in which the sleeve displacement prevention member is locked by the locking portion. It is the III-III sectional view taken on the line in FIG. It is the IV-IV sectional view taken on the line in FIG. It is a top view of the sleeve displacement prevention member in the female pipe joint member of FIG. It is a side view of the sleeve displacement prevention member in the female pipe joint member of FIG. It is a longitudinal cross-sectional view of the female pipe joint member which concerns on 2nd Embodiment, and shows the state which a sleeve displacement prevention member is not latched by the latching | locking part provided in the female joint main body. It is the VII-VII sectional view taken on the line in FIG. It is a longitudinal cross-sectional view of the female pipe joint member which concerns on 2nd Embodiment, and shows the state which a sleeve displacement prevention member is latched by the latching | locking part provided in the female joint main body. FIG. 10 is a sectional view taken along line XX in FIG. 9. It is a side view of the sliding pin which comprises the sleeve displacement prevention member in the female pipe joint member of FIG. It is a side view of the coil spring which comprises the sleeve displacement prevention member in the female pipe joint member of FIG. It is a longitudinal cross-sectional view of the female pipe joint member which concerns on 3rd Embodiment, and shows the state which a sleeve displacement prevention member is not latched by the latching | locking part provided in the female joint main body. It is the XIIII-XIIII sectional view taken on the line in FIG. It is a longitudinal cross-sectional view of the female pipe joint member which concerns on 3rd Embodiment, and shows the state by which a sleeve displacement prevention member is latched by the latching | locking part provided in the female joint main body. It is the XVI-XVI sectional view taken on the line in FIG. It is a figure similar to FIG. 3 of the female pipe joint member which concerns on 4th Embodiment. It is a figure similar to FIG. 4 of the female pipe joint member which concerns on 4th Embodiment. FIG. 18 is a plan view of a sleeve displacement prevention member in the female pipe joint member of FIG. 17. It is a side view of the sleeve displacement prevention member in the female pipe joint member of FIG. It is a partially cutaway side view of the female pipe joint member according to the first embodiment.

  A female pipe joint member 10 according to the present invention shown in FIG. 1 is of a type in which a male pipe joint member 12 to be inserted is locked, that is, connected and fixed using a ball-shaped lock element 14 in the same manner as well-known ones. It is. That is, the female pipe joint member 10 has a tubular female joint body 19 having a through hole 18 extending in the longitudinal axis direction, and the male pipe joint member 12 is received in the through hole 18 from the right end thereof. The locking element 14 is engaged with an annular locking recess 20 formed on the outer peripheral surface of the male pipe coupling member 12, and the locking element 14 is locked by the sleeve 22 provided on the outer periphery of the female coupling body 19. By preventing the child 14 from coming off, the male pipe joint member 12 is locked to the female pipe joint member 10. In addition, illustration of the valve apparatus normally provided in these female pipe joint members and male pipe joint members is omitted.

  When the male pipe coupling member 12 is inserted into the female pipe coupling member 10, the operator slides the sleeve 22 to the left against the coil spring 26 from the position shown in FIG. The annular locking element release recess 24 provided on the inner peripheral surface of the inner locking surface is positioned so as to align with the locking element 14 in the radial direction, and the locking element 14 can be displaced radially outward. The male fitting member 12 to be inserted is inserted by pushing the lock 14 outward in the radial direction. When the male pipe coupling member 12 is inserted into the female pipe coupling member 10 and the locking recess 20 is aligned with the locking element 14 in the radial direction, the sleeve 22 is separated from the operator's hand, and is thereby moved by the coil spring 26. Returned to the position of FIG.

  When the male pipe coupling member 12 is removed from the female pipe coupling member 10, the operator slides the sleeve 22 to the left against the coil spring 26 from the position shown in FIG. The annular locking element release recess 24 provided on the peripheral surface is positioned so as to align with the locking element 14 in the radial direction so that the locking element can be displaced radially outward, so that the female pipe of the male pipe coupling member 12 is provided. Pulling out from the joint member 10 is enabled. The male pipe joint member 12 is pulled out from the female pipe joint member 10, and when the operator releases the sleeve 22, the sleeve 22 is returned to the position of FIG. 1 by the coil spring 26.

  As can be seen from the above, in the configuration of the female pipe joint member, the lock 14 engages with the inserted male pipe joint member 12 to lock the male pipe joint member 12 in the radial direction. The sleeve 22 is provided on the outer peripheral surface of the female joint body 19 so that it can be displaced between the position (position in FIG. 1) and the radially outer position for unlocking the male pipe joint member 12. A locking holding position (position in FIG. 1) for holding the locking element 14 in the radially inner position (position in FIG. 1), and allowing the locking element 14 to be displaced to the radially outer position. The position can be displaced in the axial direction of the female joint body 19 between the unlocking allowable position (that is, the position where the locking element release recess 24 is aligned with the locking recess 20 of the male pipe joint member 12).

  The female pipe joint member according to this embodiment of the present invention prevents the sleeve 22 from being displaced from the lock holding position (position of FIG. 1) to the left side to reach the unlocking allowable position as described below. The sleeve displacement prevention means is provided.

  The sleeve displacement prevention means includes a torsion spring-like sleeve displacement prevention member 28 provided on the sleeve 22 and slidable on the outer peripheral surface of the female joint body 19. The sleeve 22 is rotatable in the circumferential direction, and the sleeve displacement prevention member is rotated by the rotation of the sleeve. When the sleeve 22 in the locking holding position (the position shown in FIGS. 1 and 2) is rotated in the circumferential direction, the sleeve displacement prevention member 28 slides on the circumferential portion of the outer peripheral surface of the female joint body 19. Are provided with a first surface 30 provided continuously in the circumferential direction and a second surface 32 having a smaller radius than the first surface. In the illustrated example, the first surface 30 is a circumferential surface and a pair is provided at a position opposed in the diametrical direction, and the second surface 32 forms a string with respect to the circumferential surface of the first surface 30. A pair of flat surfaces are provided at opposite positions in the diameter direction. As will be described later, the first surface 30 has a sleeve displacement prevention member 28 engaged therewith, and the sleeve displacement prevention member 28 is formed by a cylindrical member provided in the female joint body 19 and the axial direction. The sleeve 22 is deformed into a first shape that can be engaged with the shaft, whereby the sleeve 22 is displaced in the axial direction (leftward in the illustrated example) from the lock holding position (FIGS. 1 and 2) to the unlocking allowable position. At this time, the sleeve displacement prevention member 28 is engaged with the locking portion 34 to prevent the sleeve 22 from being displaced. The second surface 32 deforms the sleeve displacement prevention member 28 engaged therewith into a second shape in which the sleeve displacement prevention member 28 does not engage with the locking portion 34 of the female joint body 19 in the axial direction, thereby The sleeve 22 is allowed to displace in the axial direction (leftward in the illustrated example) from the lock holding position (FIGS. 1 and 2) to the unlocking allowable position.

  The sleeve displacement prevention member 28 is wound in a coil shape around an axis extending in a direction parallel to the axis of the female pipe joint member 10, and in an opening 36 formed so as to penetrate the sleeve 22 in the radial direction. The coil portion 38 that is set so that a part protrudes radially outward from the opening, and the coil portion is placed in the sleeve 22 from both ends of the coil portion 38 in the axial direction (the surface of FIG. The front and back sides of the female joint body 19 are formed from spring materials having both end portions 40 extending so as to be separated from each other and extending so as to be in tangential contact with the first surface 30 of the outer peripheral surface of the female joint body 19. Yes. As shown in FIG. 21, the opening 36 extends from the portion where the coil portion 38 is set to the left end edge of the sleeve 22 in the drawing, and the sleeve displacement prevention member 28 is set in the opening. Making it easy. Further, an annular recess 22-1 is provided on the inner peripheral wall of the opening 22 corresponding to the portion where the coil portion 38 of the opening 36 is set, and the both ends 40 of the spring material are made thin. 1 and is adapted to engage with the outer peripheral surface of the female joint body 19, and as shown in FIGS. 5 and 6, the ends of both end portions 40 of the spring material are the axes of the coil portions 38. The side wall 22 is formed in an L shape including a portion 40-1 extending in parallel with the coil portion 38 and substantially the same length as the coil portion 38, and the L shape portion is formed on both sides in the axial direction of the sleeve of the recess 22-1. The spring member is prevented from moving in the axial direction with respect to the sleeve 22 by being engaged with -2 and 22-3. The spring material is urged so that the included angle formed by the both end portions 40 is widened (see FIG. 6), and the sleeve 22 is rotated so that the both end portions 40 of the coil are engaged with the second surface 32. When the sleeve displacement prevention member 28 is moved, it is deformed by its spring force so that the included angle formed by the both end portions 40 is widened, and the portion of the coil portion 38 that protrudes outside the opening 36 of the sleeve 22 Is displaced in the opening 36.

  As described above, in this embodiment, the locking portion 34 provided in the female joint body 19 is a cylindrical member that is concentrically mounted on the outer peripheral surface of the female joint body 19. 22, but when the sleeve displacement prevention member 28 is in the first shape as shown in FIGS. 2 and 3, a part of the coil portion 38 protruding from the opening 36 of the sleeve 22. Is engaged with the edge of the cylindrical locking portion 34.

  7 to 10 show a second embodiment of the female pipe joint member 10 according to the present invention. The same or similar members as those of the female pipe joint member 10 in the first embodiment described above are shown with the same reference numerals.

  This female pipe joint member 10 is of a so-called one-touch mounting type. That is, the female pipe joint member 10 is provided with a ball 11 similar to the lock element in addition to the lock element 14 having the same function as the lock element in the female pipe joint member 10 according to the first embodiment. ing. This is for one-touch mounting of male pipe fittings well known to those skilled in the art. That is, the ball 11 is provided in a plurality of positions different from the lock element 14 in the circumferential direction of the female pipe joint member 10 so as to be displaceable in the radial direction at a position on the right side of the lock element 14 in the drawing. When the male pipe joint member 12 is inserted into the female pipe joint member 10, the male pipe joint member 12 first pushes the ball 11 radially outward at the tip. The pushed ball 11 presses the taper surface 25 adjacent to the locker release recess 24 of the sleeve 22, thereby displacing the sleeve 22 to the left as viewed in FIG. 7. When the male pipe joint member 12 further advances to reach the locking element 14, at that time, the sleeve 22 is displaced so that the tapered surface 25 is aligned with the locking element 14 in the radial direction. When the member 12 further advances, the locking element 14 is pushed outward in the radial direction so as to press the tapered surface 25, whereby the sleeve is further displaced leftward, so that the locking element 14 is positioned in the position of the locking element release recess 24. Thus, the male pipe joint member 12 can be further advanced into the female pipe joint member 10. That is, in this female pipe joint member 10, the male pipe joint member can be inserted and connected to the female pipe joint member without operating the sleeve 22.

  In the second embodiment, as in the first embodiment described above, the sleeve 22 is rotatable, and the outer surface of the female joint body 19 has the same first surface as in the first embodiment. 30 and the 2nd surface 32 are provided, and it has the cylindrical latching | locking part 34 provided in the female coupling main body 19. As shown in FIG. The difference from the first embodiment resides in the sleeve displacement prevention member 28. That is, the sleeve displacement prevention member 28 according to the second embodiment slides in a radial direction to a pair of openings 36 formed so as to penetrate the sleeve 22 in the radial direction at positions opposite to the diameter direction of the sleeve 22. Enabled sliding pin 28-1, and a spring member set between the sliding pin 28-1 and the sleeve 22 around the sliding pin 28-1, specifically, a compression coil spring 28- It consists of two. The sliding pin 28-1 is urged radially inward by the compression coil spring 28-2 and is slidable with the outer peripheral surface of the female joint body 19. When the sliding pin 28-1 is in a position (FIGS. 9 and 10) that engages with the circumferential first surface 30, it is pushed out against the spring member 28-2, and a part thereof. The sliding pin 28-1 is opened when it is in a position (FIGS. 7 and 8) that protrudes radially outward from the opening 36 and engages with the planar second surface 32. 36 is drawn inside.

  FIGS. 13 to 16 show a third embodiment of the female pipe joint member 10 according to the present invention. Unlike the second embodiment, the female pipe joint member 10 is not a one-touch mounting type. Like the first embodiment, when the male pipe coupling member 12 is mounted and removed, the operator can remove the sleeve 22. Must be displaced in the axial direction. In this embodiment, the basic configuration is the same as that of the first embodiment, but the locking portion 34 provided in the female joint body 19 that engages with the sleeve displacement prevention member 28 is different.

  That is, in the third embodiment, a female mold that slides with the torsion spring-like sleeve displacement prevention member 28 when the sleeve 22 is displaced in the circumferential direction when in the lock holding position (FIGS. 13 and 15). Similar to the first and second embodiments described above, the circumferential surface of the first surface 30 and the planar second surface extending to form a chord with respect to the first surface are formed on the outer peripheral surface of the joint body 19. The second surface 32 extending so as to form a chord is formed with a side surface 35 extending radially outward from the front and rear side edges in the axial direction of the female joint member joint body 19. A concave portion 37 is formed on the side surface 35, and a side surface 35 of the sleeve 22 on the unlocking allowable position side is used as a locking portion 34. In this case, the second surface 32 that forms the bottom surface of the recess 37 forms a surface that deforms the sleeve displacement prevention member 28 so that the sleeve displacement prevention member 28 can be engaged with the locking portion 34, and the sleeve displacement prevention member 28 is engaged with the second surface 32. By engaging with the side surface 35 as the locking portion 34, the sleeve 22 is prevented from being displaced in the axial direction from the locking holding position (FIGS. 13 and 15) to the unlocking allowable position. It is like that.

  The female pipe joint member according to the fourth embodiment shown in FIGS. 17 to 20 is similar to that of the first embodiment, but one circumference of the second surface 32 in the first embodiment. A step portion 33 is provided between the directional end portion (left end) and the circumferential surface of the first surface 30 that follows, and enters the second surface 32 from the other end portion (right end) of the second surface 32. Another difference is that the sleeve displacement prevention member 28 is shaped to be stopped by the step portion 33. As shown in FIGS. 19 and 20, both end portions 40 extending from the coil portion 38 extend from the coil portion 38 and are bent at right angles immediately, in parallel with the axis of the coil portion 38 and with the coil portion 38. After extending substantially the same length and extending at the tip of the female joint body 19 in a radial direction outside the female joint body 19 by a height that can be engaged with the stepped portion 33, the same shape as the both end portions 40 in the first embodiment is used. It is designed to stretch. In this embodiment, when the sleeve is rotated and the sleeve displacement prevention member 28 reaches the position where it engages the first surface 30, the sleeve displacement prevention member 28 engages with the step portion 33, The movement of the sleeve displacement prevention member 28 is stopped, so that the operator can confirm it.

  Female pipe joint member 10; ball 11; male pipe joint member 12; ball-shaped lock 14; through hole 18; female joint body 19; locking recess 20; sleeve 22; annular recess 22-1; 2, 22-3; Locking element release recess 24; Tapered surface 25; Coil spring 26; Sleeve displacement prevention member 28; Sliding pin 28-1; Compression coil spring 28-2; 33; Locking part 34; Side surface 35; Opening 36; Recess 37; Coil part 38;

Claims (10)

A tubular female joint main body for receiving a male pipe joint member, the female having a first surface continuously provided in the circumferential direction on the outer peripheral surface, and a second surface having a smaller radius than the first surface Mold fitting body,
A locking element that is mounted on a female joint body so as to be displaceable in a radial direction, and engages with a male pipe joint member inserted into the female joint body to lock the male pipe joint member. A lock element that is displaceable between a radially inner position of and a radially outer position for unlocking the male fitting member;
An unlocking position provided on the outer peripheral surface of the female joint main body and allowing the locking element to be displaced to the radially outer position, and a locking holding position for holding the locking element at the radially inner position. A sleeve that is displaceable in the axial direction of the female joint body between the allowable positions;
A sleeve displacement prevention member provided on the sleeve, slidable with the outer peripheral surface of the female joint body, and pressed against the outer peripheral surface by a spring biasing force;
The locking portion provided on the female joint main body and the sleeve are rotatable in the circumferential direction at a position closer to the unlocking permitted position than the sleeve displacement preventing member when the sleeve is in the locking holding position. ,
When the sleeve in the locked holding position is rotated in the circumferential direction with respect to the female joint body, the sleeve displacement prevention member is engaged with the first surface by the spring biasing force. The first shape becomes a second shape by engaging with the second surface, and the sleeve displacement prevention member becomes one of the first shape and the second shape by rotating. It is possible to engage with the engaging portion provided in the female joint main body in the axial direction, thereby preventing the sleeve from being displaced in the axial direction from the locking holding position to the unlocking allowable position. A female pipe joint member. The locking portion is provided so as to extend radially outward from the outer peripheral surface of the female joint body,
The sleeve displacement prevention member has a portion that protrudes radially outward from the sleeve in the first shape, and when the sleeve is about to be displaced in the axial direction from the locking holding position to the unlocking allowable position. The female pipe joint member according to claim 1, wherein the displacement of the sleeve is prevented by the portion being locked to the locking portion.   The locking portion is constituted by a cylindrical member fixed concentrically with the female joint main body on the outer peripheral surface of the female joint main body, and the sleeve displacement preventing member has a second shape. When there is an inner diameter for receiving the sleeve that is displaced from the locking holding position to the unlocking allowable position, and when the sleeve displacement preventing member is in the first shape, the unlocking allowable position from the locking holding position. 3. The female pipe coupling member according to claim 2, wherein the sleeve is prevented from displacing by engaging with the portion of the sleeve displacement prevention member protruding radially outward from the sleeve that is displaced to the right.   The outer peripheral surface of the female joint body that slides with the sleeve displacement prevention member when the sleeve is rotated in the circumferential direction when in the locked holding position is a circumferential surface as a whole. The surface has a planarly extending surface that forms a chord with respect to the circumferential surface, the circumferential surface is the first surface, and the planarly extending surface is the second surface. Item 4. The female pipe joint member according to any one of Items 1 to 3. A sleeve displacement prevention member is wound in a coil around an axis extending in a direction parallel to the axis of the female joint body, and is set in an opening formed so as to penetrate the sleeve in the radial direction. A coil portion set so that the portion protrudes radially outward from the opening, and extends from the both ends of the coil portion into the sleeve so as to be separated from each other when viewed in the axial direction of the coil portion; The female joint body is formed of a spring material having both ends extending so as to be in tangential contact with the circumferential surface of the first surface of the outer peripheral surface of the female joint body, and the sleeve is moved from the locking holding position to the unlocking allowable position. When the axial displacement is attempted, the portion of the coil portion set so as to protrude radially outward from the opening is locked to the locking portion, thereby preventing the displacement of the sleeve. Was
When the sleeve is rotated so that both end portions of the coil are engaged with the second surface, the sleeve displacement preventing member is deformed into the second shape and the part of the coil portion is The female pipe coupling member according to claim 2 or 3, wherein the pipe is drawn into the opening of the sleeve.   A sleeve displacement prevention member is provided between the sliding pin and the sleeve, and a sliding pin provided so as to be slidable in the radial direction in an opening formed so as to penetrate the sleeve in the radial direction. The sliding pin is urged radially inward so that the sliding pin is slidably engaged with the outer peripheral surface of the female joint body. When the position is engaged with the first surface, it is pushed out against the spring biasing force, and a part protrudes radially outward from the opening, and the sleeve is moved from the lock holding position. When it is about to be displaced in the unlocking position in the axial direction, the portion is locked to the locking portion, so that the displacement of the sleeve is prevented, and the second surface is engaged. When it is in the matching position, the part will be pulled inside the opening. Female pipe coupling member according to claim 2 or 3 are in.   The outer peripheral surface of the female joint body that slides with the sleeve displacement prevention member when the sleeve is displaced in the circumferential direction when in the lock holding position is generally a circumferential surface, and the circumferential surface A planarly extending surface that forms a string with respect to the circumferential surface, and radially outward from an edge that extends in the direction of forming the string on the unlocking position side of the sleeve of the planarly extending surface A concave portion having a side surface extending to form the locking portion, the planarly extending surface forms the second surface, and the circumferential surfaces on the front and rear sides in the circumferential direction of the planarly extending surface are the first surface. The sleeve displacement prevention member is engaged with the planarly extending surface to form the second shape so as to be engageable with the side surface as the locking portion, thereby locking the sleeve. The female pipe joint portion according to claim 1, wherein displacement from the holding position to the unlocking allowable position is prevented in the axial direction. . A coil set in an opening in which a sleeve displacement prevention member is wound in a coil shape around an axis extending in a direction parallel to the axis of the female joint body and penetrates the sleeve in the radial direction The coil portion extends from the both ends of the coil portion and the coil portion into the sleeve so as to be separated from each other when viewed in the axial direction, and tangential to the first surface of the outer peripheral surface of the female joint body. Formed from a spring material having both ends extending to contact,
8. The sleeve displacement prevention member according to claim 7, wherein the sleeve displacement preventing member is deformed into the second shape when the sleeve is rotated and the both end portions of the coil are brought into a position where they are engaged with the second surface. The female pipe joint member according to the description.   A plane extending from the circumferential surface so as to form the string has a stepped portion on one end side in a direction extending to form the string, and the circumferential surface through the stepped portion. When the sleeve is rotated and the sleeve displacement prevention member provided on the sleeve enters the planarly extending surface from the other end side, the step portion The female pipe coupling member according to claim 4 or 7, wherein the female pipe coupling member is locked by the rotation of the sleeve to prevent the sleeve from rotating. A female pipe joint member according to any one of claims 1 to 9, and a male pipe joint member slidably inserted into the through hole of the female pipe joint member, And a male pipe coupling member having an annular recess for receiving the locking element when the locking element of the coupling member is in the radial position.

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