JP4787775B2 - Pipe fittings and sockets - Google Patents

Description

  The present invention relates to a pipe joint including a socket and a plug, and more particularly to a so-called one-touch connection type pipe joint that can be connected to each other simply by inserting a plug into the socket.

  The one-touch connection type pipe joint is formed by simply inserting the plug (male joint member) into the socket (female joint member), and the spherical lock provided in the socket is formed on the outer surface of the inserted plug. Locking is performed by engaging with the locking recess and prevents the plug from being pulled out. Several types of plugs have been developed so far.

  One is, as disclosed in Patent Document 1 below, the locking element is inserted into the insertion hole by a locking element holding member that is slidable in the axial direction of the socket on the inner wall surface of the plug insertion hole of the socket. The tip of the plug to be inserted pushes the lock holding member into the plug insertion hole while passing through the lock, and the plug is inserted into the plug insertion hole by a predetermined length. When inserted, the locking element enters the locking recess formed on the outer peripheral surface of the plug. Specifically, a sleeve is movably attached to the outer periphery of the socket, and when the locking element enters the locking recess, the engagement with the sleeve of the locking element is released, and the sleeve is moved by a spring. First, it is displaced in the axial direction and then in the circumferential direction, and the locking element is pressed and engaged from the outside in the radial direction to lock. The sleeve has an axially extending groove, the socket has a guide member that enters the groove, and when the locking element enters the locking recess of the plug and the sleeve moves axially as described above, the groove It is guided along the guide member. The groove has a circumferential extension that circumferentially aligns with the guide member when so guided and allows displacement of the sleeve in the circumferential direction. This prevents the sleeve from being accidentally returned to the original position in the axial direction due to an impact or the like, so that the locking element is released and the locking of the plug is released.

  However, in this type of pipe joint, the locking element holding member is pushed in an inappropriate state, and the locking element is displaced inward in the radial direction even though the plug has not reached the locking position. It may be displaced. In this case, there is a possibility that the operator will mistake the plug when the plug is properly locked by seeing the displacement of the sleeve.

  Another type is that the locking element is partially protruded into the plug insertion hole of the socket without providing the problematic locking element holding member as described above, and the axial direction provided on the inner peripheral surface of the sleeve. The extending inclined surface is engaged with the locking element, and when the plug is inserted into the insertion hole, the locking element is pressed radially outward at the tip of the plug through the inclined surface. An axial force is applied to the sleeve, and the sleeve is displaced in the axial direction against the spring, so that the locker is displaced radially outward to allow insertion of the plug. The locking element enters a locking recess provided on the outer peripheral surface of the plug, whereby the sleeve is returned in the axial direction by a spring, and the inclined surface is engaged with the locking element again and pressed from the outside in the radial direction. The plug by preventing it from exiting the locking recess It is intended to binding locked. For example, Patent Document 2 below discloses a similar type of plug of this type.

  In this pipe joint, the locking element is pressed by the inclined surface provided on the inner peripheral surface of the sleeve as described above. Therefore, when a predetermined pulling force is applied to the plug, the locking member It is urged outwards in the radial direction again by the side wall surface (inclined), and is displaced radially outward while displacing the cylindrical member in the axial direction in the same manner as the insertion, and the plug is pulled out from the socket. become.

  Another type is similar to that of the second type as shown in Patent Document 3 below, but is a sleeve that is radially displaceable closer to the plug receptacle than the socket locker. An operating element is provided, the sleeve operating element is displaced radially outward at the tip of a plug inserted into the socket, and the sleeve is displaced in the axial direction in the same manner as the sleeve is displaced by the locking element in the second type. Subsequently, as in the case of the second type, the tip of the plug is advanced through the insertion hole while displacing the locking element radially outward, and finally the locking element is moved to the outer peripheral surface of the plug. The plug is connected by entering into the locking recess provided in the sleeve, whereby the sleeve is returned by the spring and the locking element is pressed from the outside in the radial direction to prevent the locking element from coming out of the locking recess.

In this pipe joint, when the plug is not inserted, the sleeve operation element is engaged with the inclined surface of the sleeve, and the lock element is engaged with a surface parallel to (i.e., not inclined) the axial direction of the sleeve. When the sleeve operator presses the inclined surface of the sleeve and slightly displaces the sleeve by inserting the plug, the inclined surface must engage with the lock. That is, when the plug is not inserted, the lock must be positioned close to the inclined surface. In other words, when the locking element enters the locking recess, the sleeve is returned to the initial state by the spring (that is, the state before the plug is inserted), and the parallel surface of the sleeve causes the locking element to move in the radial direction. When it comes to the position to press from the outside, the locker is in a position close to the inclined surface. For this reason, in this type of pipe joint, the socket and the plug that are connected and locked are subjected to a certain degree of impact and the sleeve is slightly displaced, so that the inclined surface is engaged with the lock and the plug is connected to the socket. There is a risk of disengagement.
Reality 2-34553 Shoko 47-42013 JP2005-090669

  An object of this invention is to eliminate the trouble in the above conventional one-touch type pipe joints.

That is, the present invention
A socket (12) in a pipe joint (10) comprising a socket (denoted by reference numeral 12 in the embodiment described below) and a plug (14) inserted and connected to the socket,
A cylindrical socket body (18) having a through hole (18-1) provided to penetrate in the radial direction;
A locker (20) movable in the radial direction in the through hole,
In order to prevent the plug (14) from being pulled out of the socket (12) by engaging with a locking recess (14-2) formed on the peripheral surface of the plug (14) inserted into the socket (12). A first radial position of
A second radial position that is displaced radially outward from the first radial position to disengage from the locking recess (14-2) and allow the plug (14) to be inserted and removed from the socket (12); A locker (20) which is displaceable between;
A sleeve (22) attached to the periphery of the socket body (18) so as to be displaceable and having an inner peripheral surface (22-1) slidable with an outer peripheral surface of the socket main body, the inner peripheral surface (22-1) includes an opening (23-4) that allows the locking element (20) to move radially outward to the second radial position, and the opening (23-4). A sleeve (22) having a circumferentially adjacent locker engaging portion (23-3);
A spring member (24) set between the socket body (18) and the sleeve (22);
The sleeve (22) is held at a predetermined position on the socket body (18), and at the same time, sleeve holding guide means (in the same embodiment) guides the displacement of the sleeve (22) on the socket body (18). Is constituted by the groove 30 and the protrusion 32),
In a state in which the plug (14) is not inserted into the socket (12), the sleeve (22) is engaged with the lock of the sleeve (22) against the spring force in the axial direction of the spring member (24). The part (23-3) is held in a position aligned with the locking element (20) in the radial direction;
A circumferential force applied to the sleeve (22) via the locker engaging portion (23-3) by the locker (20) inserted into the plug (14) and pushed out radially outward by the plug. Allows the sleeve (22) to be displaced in the circumferential direction toward the position where the open portion (23-4) engages the locking element (20) against the spring member (24). And
As a result, the locking element (20) engages with the opening (23-4) to be in the second radial position, and the plug (14) is further inserted so that the locking recess ( 14-2) is radially aligned with the locking element (20), and the locking element (20) is detached from the opening (23-4) and enters the locking recess (14-2) to form the sleeve ( 22), the sleeve (22) is guided to be displaced in the axial direction by the urging force in the axial direction of the spring member (24) when it is in a position where it can be disengaged from the engagement of the spring member (24). ,
And sleeve holding guide means for guiding the sleeve (22) to be returned in the circumferential direction by the biasing force in the circumferential direction biased by the spring member (24) and holding the sleeve in the returned position;
A socket in a pipe joint having

  That is, in the pipe joint (10) using the socket (12), it is not necessary to use a lock holding member as in the first conventional pipe fitting. Allows one-touch insertion and connection of plugs that do not occur. Further, until the plug is connected, the sleeve (22) is first displaced in the circumferential direction, then displaced in the axial direction, and further displaced so as to be returned in the circumferential direction. The plug (14) cannot be removed from the socket (12) unless the sleeve (22) is displaced in the circumferential direction and displaced in the axial direction. For this reason, it is possible to greatly reduce the possibility that the plug will accidentally come off the socket as in the second and third conventional pipe joints.

Specifically, the holding guide means
A holding guide member fixed at a predetermined position on the outer peripheral surface of the socket body (18) (in the same embodiment, implemented as a protrusion 32);
A guide groove (30) provided on the sleeve (22) for receiving and guiding the holding guide member (32), the axial direction portion (30-2) extending in the axial direction, and one end of the axial direction portion The first circumferential direction portion (30-1) extending in the circumferential direction from the second circumferential direction extending from the other end of the axial direction portion (30-2) in the same circumferential direction as the first circumferential direction portion (30-1) Part (30-3),
The first circumferential portion (30-1) receives the holding guide member (32) in a state in which the plug (14) is not inserted into the socket (12), and moves in the axial direction of the spring member (24). Against the spring force, the locking element engaging portion (23-3) is held in a position aligned with the locking element (20) in the radial direction,
In the axial direction portion (30-2), the plug (14) is inserted, the sleeve (22) is displaced in the circumferential direction by the locking element (20), and the opening portion (23-4) is When the locking guide (20) is brought into a radial engagement position, the holding guide member (32) is received at the one end of the axial direction portion (30-2), and then the locking piece (20). Enters the locking recess (14-2) of the plug (14), and when the sleeve (22) is disengaged from the sleeve (22), the sleeve (22) is biased in the axial direction of the spring member (24). Moves along the holding guide member (32) when displaced axially to guide the sleeve;
The second circumferential groove (30-3) is formed when the sleeve (22) is displaced in the axial direction and the other end of the axial direction part (30-2) reaches the holding guide member (32). The holding guide member (32) can be received, and the sleeve (22) is rotated by the biasing force of the spring member (24) in the circumferential direction by the biasing force of the spring member (24) in the circumferential direction. It is possible to allow displacement in the direction.

In addition, the pipe joint according to the present invention is
In the connection display member (34) attached to the outer peripheral surface of the socket body (18), before the plug (14) is inserted and before the sleeve (22) is displaced in the axial direction, After the plug (14) is inserted and connected by being engaged with the sleeve (22) and cannot be removed from the socket body, the sleeve (22) is displaced in the axial direction, thereby the sleeve (22). It is possible to have a connected display member that is disengaged by 22) and is removable from the socket body (18).

  The operator can confirm that the plug connection is completed by confirming that the connection display member (34) can be removed from the socket body.

In particular,
The connection display member (34) has an arcuate portion (34-1) fitted into an annular groove (36) extending in the circumferential direction formed on the outer peripheral surface of the socket body (18), and The arcuate portion (34-1) may be engaged from the radially outer side to the sleeve (22) in a state before the sleeve is inserted in the axial direction before the plug is inserted. it can.

  Moreover, a connection display member (34) can have a knob | pick part (34-2) which protrudes to a radial direction outer side from an arc-shaped part.

  Further, in response to the connection indicating member (34) being removed from the annular groove (36), it projects from the outer surface of the socket body (18) and engages with the sleeve (22) to engage the sleeve (22). ) Can also be provided to prevent displacement in the circumferential direction.

In the socket having the above-described holding guide member and guide groove according to the present invention,
The first circumferential portion (30-1) of the guide groove (30) includes a terminal portion at a position away from the axial direction portion by a predetermined length,
The circumferential direction in which the spring member (24) presses the end portion of the first circumferential portion (30-1) against the holding guide member (32) in a state where the plug is not inserted into the socket. A spring force can be provided.

  Since the spring member (24) is provided with a spring force in advance, it is inadvertent when the holding guide member (32) is in the first or second circumferential direction portion (30-1, 30-3). The sleeve (22) is prevented from moving in the circumferential direction.

In particular,
The second circumferential direction portion (30-3) includes a terminal portion at a position farther from the axial direction portion (30-2) than the first circumferential direction portion (30-1),
When the sleeve (22) is displaced in the circumferential direction by the spring member (24) and the holding guide member (32) is positioned in the second circumferential portion (39-3), the second The end portion of the circumferential portion can be pressed against the holding guide member (32) by the spring force of the spring member (24).

  In short, when the holding guide member (32) is positioned in the first circumferential portion (30-1) in a state in which the plug (14) is not inserted into the socket (12), the first guide is provided. The end portion of the circumferential portion (30-1) is pressed against the holding guide member (32) more strongly than the end portion of the second circumferential portion (30-3) is pressed against the holding guide member (32). It is assumed that That is, by doing in this way, it is possible to prevent the slug (22) in a state where the plug (14) is not inserted into the socket (12) from being carelessly displaced in the circumferential direction. The sleeve (22) is inadvertently displaced in the circumferential direction to coincide with the axial direction portion (30-2) of the guide groove (30), and the sleeve (22) is axially moved by the spring force in the axial direction of the spring member (24). If it is displaced in the direction, the locking element (20) cannot be in the second radial position, and it is intended to prevent the one-touch type plug from being unable to be inserted.

In the socket according to the present invention,
In a state where the plug is not inserted into the socket, the sleeve (22) is circumferentially directed toward a position where the open portion (23-4) of the sleeve (22) is radially aligned with the locker (20). In the circumferential direction of the sleeve (22) in the circumferential direction of the sleeve (22). The displacement prevention can be released.

In particular,
The circumferential displacement prevention means is
A circumferential displacement prevention member attached to the outer peripheral surface of the socket body (18) so as to be displaceable in the circumferential direction (in the same embodiment, the connection display member 34 also serves as the circumferential displacement prevention member);
A locking member provided on the socket body (18) and locking the circumferential displacement member (34) in the circumferential direction;
The circumferential displacement prevention member (34) is engaged with the sleeve (22) when the plug (14) is not inserted into the socket (12), and the sleeve resists the spring force. A blocking position for preventing movement in the circumferential direction, and a displacement in the circumferential direction from the blocking position to disengage the sleeve, so that the sleeve (22) is circumferentially resisted against the spring force. It can be displaced between the blocking release position that allows it to be moved with
The locking member may be engaged with the circumferential blocking member when the circumferential blocking member (34) is in the blocking position.

  That is, it is intended to more reliably prevent inadvertent circumferential movement of the sleeve in the socket when the plug is not inserted.

More specifically,
The circumferential displacement preventing member (34) is engaged with the sleeve (22) in a state before the sleeve (22) is axially displaced before the plug (14) is inserted, After the plug (14) is inserted and connected to the socket main body (18), the sleeve (22) is displaced in the axial direction, so that the sleeve (22) is disengaged. , Removable from the socket body (18).

  The circumferential displacement prevention member in this case can also function as the above-described connection display member (34).

  The present invention also provides a pipe joint comprising a socket as described above and a plug inserted and connected to the socket.

  Hereinafter, a pipe joint concerning the present invention is explained in detail based on a drawing shown in an accompanying drawing.

  As shown in the drawing, the pipe joint 10 according to the present invention includes a socket 12 and a plug 14 that is inserted into the socket 12 and connected thereto in the same manner as a normal one. In the accompanying drawings, FIGS. 1 to 8 show changes over time from the start of plug insertion to the completion of plug insertion locking. Each figure is a longitudinal cross-sectional side view (a) for showing the mutual relationship between the plug 14 and the socket 12 in order to make it easy to understand the structure and operation of the pipe joint 10 according to the present invention, and FIG. It includes a side view (b) of the socket shown, an end view (c) of the socket, and a cross-sectional view (d) of the socket. (A) in each drawing is a view taken along line aa in (c), and (d) is a view seen along line dd in (a) (provided that line aa) And dd lines are shown only in FIG. 1).

  The socket 12 includes a cylindrical socket body 18 having a plurality of through holes 18-1 provided so as to penetrate in the radial direction, a locker 20 that is movable in the radial direction in the through holes 18-1, and A sleeve 22 attached around the socket body 18 and a spring member, specifically a coil spring 24, provided between the socket body 18 and the sleeve 22 are provided. In the illustrated example, the lock 20 is a sphere.

  The locking element 20 engages with a locking recess 14-2 formed on the peripheral surface 14-1 of the plug 14 inserted into the socket 12 to prevent the plug from being pulled out from the socket. And a second radial position that is displaced radially outward from the first radial position, disengages from the locking recess 14-2, and allows the plug 14 to be inserted and extracted from the socket 12. (Fig. 5) is displaceable.

  The sleeve 22 is attached to the periphery of the socket main body so as to be displaceable, and has an inner peripheral surface 22-1 that is slidable with the outer peripheral surface of the socket main body. As shown in (d), the recesses 23 are formed at intervals of 90 ° in the circumferential direction. The recess 23 has a width substantially equal to the diameter of the locking element 20 (see (a) in each figure) and extends in the circumferential direction. The concave portion 23 has a pair of slightly arcuate inclined surfaces 23-1 and 23-2 that extend in the circumferential direction and intersect with each other to define the concave portion. 5 (d), an opening 23-4 that allows the lock 20 to move radially outward to a second radial position (that is, a position that enables insertion and removal of the plug); In a state where the plug 14 is not inserted (FIG. 1), when the lock 20 is engaged with the inclined portion, the lock 20 partially protrudes into the plug insertion hole 18-2 of the socket body 18. It has the locker engaging part 23-3 which makes it a state.

  The sleeve 22 slides in the circumferential direction and the axial direction on the socket body 18 as the plug shown in FIG. 8 is inserted and connected from the state where the plug shown in FIG. 1 is not inserted.

  That is, when the plug 14 is first inserted into the plug insertion hole 18-2 of the socket body 18, the distal end portion 14-3 having a small diameter of the plug partially locks into the plug insertion hole. The inclined portion 14-4 that passes through the member 20 and continues to the tip portion 14-3 is engaged with the lock 20 (FIG. 2).

  When the insertion of the plug is continued in this state, the lock 20 is pushed radially outward by the inclined portion 14-4 of the plug 14 and presses the lock engaging portion 23-3 on the inner peripheral surface of the sleeve. The sleeve 22 is displaced in the clockwise direction as viewed in (d) of FIGS. 1 to 9, and finally, the open portion 23-4 of the sleeve inner peripheral surface is engaged with the lock 20. (FIG. 5). At this time, the locking element 20 is pushed into the through hole 18-1, and the portion with the largest diameter of the inclined portion 14-4 of the plug 14 passes through the locking element 20 and is inserted into the plug insertion hole 18-. 2 is allowed to enter.

  The plug 14 has a locking recess 14-2 following the inclined portion 14-4. When the plug is continuously inserted, the locking recess 14-2 is aligned with the locking element 20 in the radial direction. Become. The depth of the locking recess 14-2 and the length of the through hole 18-1 are substantially the same size as the diameter of the locking element. Therefore, the locking recess 14-2 is aligned with the locking element 20 in the radial direction and locked. When the child enters the locking recess, the locking of the sleeve 22 to the socket body 18 by the locking element 20 is released, so that the coil spring 24 moves the sleeve in the axial direction (FIGS. 1 to 9 (a), (b)). To the right) (FIGS. 6 and 7). When the sleeve 22 is displaced in the axial direction in this way, the recess 23 of the sleeve 22 and the locking element 20 are not aligned in the radial direction, and the sleeve inner peripheral surface 22-1 locks the locking element 20 to the locking recess 14-2. The lock 20 is in the first radial direction position. The movement of the sleeve 22 in the axial direction is stopped by a locking member (not shown).

  As shown in FIG. 1 to FIG. 9B, a groove 30 is formed in the sleeve 22, and a projection 32 is provided on the socket body 18 so as to be received in the groove 30 from the outer surface thereof. When the sleeve 22 moves in the clockwise direction (circumferential direction) and the axial direction as described above, the side wall surface of the groove 30 is slidably engaged with the protrusion 32 to guide the movement of the sleeve. It has become.

  As illustrated, the groove 30 includes a first circumferential portion 30-1 that allows the sleeve 22 to move in the clockwise direction, an axial portion 30-2 that guides the movement of the sleeve 22 in the axial direction, and And a second circumferential direction portion 30-3 following the axial direction portion. The second circumferential portion 30-3 is arranged to be aligned with the protrusion 32 in the circumferential direction when the sleeve 22 is stopped after being moved in the axial direction as described above. In addition, the end portion of the second circumferential direction portion 30-3 is located farther from the axial direction portion 30-2 than the first circumferential direction portion 30-1.

  In a state where the plug is not inserted into the socket, as shown in FIG. 1, the protrusion 32 is pressed against the end portion of the first circumferential portion 30-1, and in this state, the sleeve 22 is a coil spring 24. Is biased rightward in the axial direction (as viewed in FIG. 1 (a)) and counterclockwise (as viewed in FIG. 1 (c)).

  When the sleeve 22 is moved in the axial direction as described above and stopped by a locking member (not shown), the second circumferential portion 30-3 of the groove 30 is aligned with the protrusion 32 in the circumferential direction ( 7), the sleeve 22 is returned in the circumferential direction by the biasing force in the circumferential direction of the coil spring 24, and the protrusion 32 is pressed against the terminal end of the second circumferential portion 30-3 as shown in FIG. It becomes. In this state, as described above, the inner peripheral surface 22-1 of the sleeve 22 is in a state of pressing the locking element 20 against the locking recess 14-2. Contrary to the above, it is necessary to first rotate in the circumferential direction and then move in the axial direction, and the plug 14 is inserted into the socket 12 and locked. In this state, it is assumed that the sleeve is accidentally or intentionally rotated in the circumferential direction, and the protrusion 32 enters the axial direction portion 30-2 of the groove 30 so that the plug can be pulled out. However, the drawing is limited to a short position from the state in which the protrusion 32 enters the axial direction portion 30-2 (FIG. 4) to the position before being positioned in the second circumferential direction portion 30-3 (FIG. 5), Since the sleeve is applied with a biasing force in the circumferential direction, and the protrusion 32 is easily removed from the axial direction portion and easily enters the second circumferential direction portion, the possibility that the plug is detached from the socket is low.

  FIG. 9 shows a state in which the plug insertion and locking are completed as in FIG. 8, but shows a state in which the connection display member 34 attached to the socket body 18 is removed. That is, the connection display member 34 includes an arcuate portion 34-1 adapted to be fitted into an annular groove 36 formed on the outer peripheral surface of the socket body 18, and a knob portion 34 projecting from the center of the arcuate portion. -2. When the arcuate portion 34-1 is fitted in the annular groove 36, the outer surface thereof is substantially flush with the outer surface of the socket body 18. The left end edge 22-2 of the sleeve 22 in FIG. 1 before the plug 14 is inserted overlaps with the arcuate portion 34, so that the connection display member 34 cannot be removed from the socket body 18. ing. The left end edge 22-2 of the sleeve 22 is formed with an arc-shaped notch 22-3 for passing the knob portion 34-2 in addition to a part of the groove 30 described above. .

  After the operator has made the plug inserted and locked (FIG. 8) by the above-described work, the operator removes the connection display member 34 from the socket body 18 and confirms that the plug has been inserted and locked. Can do.

  In addition, although the recessed part 34-3 is formed in the center position of the circular-arc-shaped part 34-1 of the connection display member 34, a plug is not inserted in a socket, but this is the pick part 34-2 of the connection display member 34. In the state where the sleeve notch 22-3 is engaged with the left edge as viewed in FIG. 1 (c), the recess 34-3 is formed on the bottom surface of the annular groove 36 of the socket body. It is designed to be locked to a protrusion (not shown). The connection display member 34 is displaced in the clockwise direction as viewed in FIG. 1C, and prevents the knob 34-2 from moving away from the left edge of the sleeve notch 22-3. is there. When the operator inserts the plug into the socket, when the operator applies a force in the clockwise direction as viewed in FIG. 1C to the knob 34-2, the recess 34-3 is detached from the locking projection, The sleeve is displaced in the circumferential direction. That is, unless the operator applies such a force, the connection display member is not displaced in the circumferential direction. Therefore, the sleeve is accidentally displaced in the circumferential direction, and the spring force of the spring member causes the FIG. The locking element 20 is fixed in a state of protruding into the plug insertion hole of the socket body, thereby preventing the plug from being unable to be inserted in a one-touch manner. ing.

  As mentioned above, although embodiment of the pipe joint concerning this invention was described, this invention is not limited to this. For example, the locker engaging portion 23-3 is shown as a part of the inclined surface 23-1 in the above-described embodiment, but may be a boundary line portion between the concave portion 23 and the sleeve inner peripheral surface 22-1. That is, with the insertion of the plug 14, such a locking element 20 is pressed against the locking member engaging portion 23-3 as such a boundary line portion, so that the locking element 20 moves the sleeve in the circumferential direction. As long as it moves to the inside of the recess 23 while being displaced by the above, it is sufficient.

  Although not shown, the rotation preventing member held by the connection display member 34 is mounted in the socket body, and the rotation prevention member is attached to the socket body in response to the connection display member 34 being removed. It is also possible to project from the surface and engage with the sleeve to prevent circumferential displacement of the sleeve.

The plug of the pipe joint concerning the present invention shows the state before being inserted in a socket, (a) is a longitudinal section side view for showing the relation between a plug and a socket, and (b) is this longitudinal section side view The side view of the socket shown in the figure, (c) is an end view of the socket, (d) is a cross-sectional view of the socket, and (a) is seen along the aa line in (c). The figure (d) is the figure seen along the dd line in (a). The state where the plug of the pipe joint has started to be inserted into the socket is shown, (a) is a longitudinal sectional side view for showing the relationship between the plug and the socket, and (b) is shown in the longitudinal sectional side view. A side view of the socket, (c) is an end view of the socket, and (d) is a transverse sectional view of the socket. The insertion of the pipe joint plug into the socket is shown, (a) is a longitudinal sectional side view for showing the relationship between the plug and the socket, and (b) is shown in the longitudinal sectional side view. (C) is an end view of the socket, and (d) is a transverse sectional view of the socket. The state in which the plug of the pipe joint is further inserted into the socket is shown, (a) is a longitudinal sectional side view for showing the relationship between the plug and the socket, and (b) is the longitudinal sectional side view. The side view of the socket shown, (c) is an end view of the socket, (d) is a cross-sectional view of the socket. The insertion of the pipe joint plug into the socket further proceeds, and shows the state immediately before the socket locking element enters the locking recess of the plug, (a) is a longitudinal section for showing the relationship between the plug and the socket A side view, (b) is a side view of the socket shown in the longitudinal sectional side view, (c) is an end view of the socket, and (d) is a transverse sectional view of the socket. The state immediately after the socket locking element enters the locking recess of the plug is shown, (a) is a longitudinal sectional side view for showing the relationship between the plug and the socket, and (b) is a longitudinal sectional side view. The side view of the socket shown, (c) is an end view of the socket, (d) is a cross-sectional view of the socket. The state when it has reached the position of the movement of the sleeve in the axial direction is shown, (a) is a longitudinal sectional side view for showing the relationship between the plug and the socket, and (b) is the longitudinal sectional side view. The side view of the socket shown, (c) is an end view of the socket, (d) is a cross-sectional view of the socket. The sleeve is moved in the circumferential direction following the movement in the axial direction, and shows a state where the insertion and locking of the plug is completed, (a) is a longitudinal sectional side view for showing the relationship between the plug and the socket, b) is a side view of the socket shown in the longitudinal sectional side view, (c) is an end view of the socket, and (d) is a transverse sectional view of the socket. In the state where the insertion and locking of the plug is completed, the state where the connection display member is removed from the socket body is shown, (a) is a longitudinal sectional side view for showing the relationship between the plug and the socket, (b) The side view of the socket shown by a longitudinal cross-sectional side view, (c) is an end view of the socket, and (d) is a cross-sectional view of the socket.

Explanation of symbols

  Pipe joint 10; Socket 12; Plug 14; Peripheral surface 14-1; Locking recess 14-2; Tip portion 14-3; Inclined portion 14-4; Socket body 18; Through hole 18-1; Locking element 20; Sleeve 22; Inner peripheral surface 22-1; Left edge 22-2; Notch 22-3; Recess 23; Inclined surfaces 23-1 and 23-2; Locking element engaging part 23-3; Opening portion 23-4; coil spring 24; groove 30; first circumferential direction portion 30-1; axial direction portion 30-2; second circumferential direction portion 30-3; projection 32; 1; knob portion 34-2; concave portion 34-3; annular groove 36

Claims (12)

A socket in a pipe joint comprising a socket and a plug inserted into and connected to the socket,
A cylindrical socket body having a through hole provided to penetrate in a radial direction;
A locker that is movable in the radial direction in the through hole,
A first radial position for engaging a locking recess formed in the peripheral surface of the plug inserted into the socket to prevent withdrawal of the plug from the socket;
A locking element that is displaced radially outward from the first radial position, disengages from the locking recess, and is displaceable between a second radial position allowing insertion and withdrawal of the plug from the socket; ;
A sleeve having an inner peripheral surface which is slidably attached to the periphery of the socket main body and is slidable with an outer peripheral surface of the socket main body, the inner peripheral surface moving the locking element radially outward A sleeve having an opening portion allowing the second radial position and a locker engaging portion adjacent to the opening portion in the circumferential direction;
A spring member set between the socket body and the sleeve;
Sleeve holding guide means for holding the sleeve at a predetermined position on the socket body and guiding displacement of the sleeve on the socket body,
In a state in which the plug is not inserted into the socket, the sleeve is held in a position where the locking element engaging portion of the sleeve is radially aligned with the locking element against the spring force in the axial direction of the spring member. As well as
When the plug is inserted and pushed outwardly in the radial direction by the plug, a force in a circumferential direction applied to the sleeve via the locker engaging portion by the locker causes the sleeve to resist the spring member and the opening portion. Is allowed to be displaced in the circumferential direction toward the position where it engages the locking element;
As a result, the locking element engages with the opening to be in the second radial position, the plug is further inserted, and the locking recess of the plug is aligned with the locking element in the radial direction. The sleeve is displaced in the axial direction by the urging force in the axial direction of the spring member when it is in a position that allows it to come out of the opening and enter the locking recess and disengage from the engagement with the sleeve. To guide you
And sleeve holding guide means for guiding the sleeve to be returned in the circumferential direction by a biasing force of the spring member in the circumferential direction and holding the sleeve in the returned position;
Socket in pipe fittings. The holding guide means comprises:
A holding guide member fixed at a predetermined position on the outer peripheral surface of the socket body;
A guide groove provided in the sleeve for receiving and guiding the holding guide member, the axial direction portion extending in the axial direction, the first circumferential direction portion extending in the circumferential direction from one end of the axial direction portion, and the axial line A second circumferential direction portion extending in the same circumferential direction as the first circumferential direction portion from the other end of the direction portion;
The first circumferential direction portion receives the holding guide member in a state where the plug is not inserted into the socket, and resists the spring force in the axial direction of the spring member, so that the lock engaging portion is Hold it in a position that aligns radially with the child,
The axial portion is inserted into the axial portion when the plug is inserted and the sleeve is displaced in the circumferential direction by the locking element, and the opening portion is in a position to engage with the locking element in the radial direction. The holding guide member is received at the one end, and then, when the locking member enters the locking recess of the plug and is disengaged from the sleeve, the sleeve is axially moved by the axial biasing force of the spring member. Moving along the holding guide member to guide the sleeve when displaced
The second circumferential portion allows the holding guide member to be received when the sleeve is displaced in the axial direction and the other end of the axial portion reaches the holding guide member, The socket according to claim 1, wherein the sleeve is allowed to be displaced in the circumferential direction by a biasing force in the circumferential direction.   A connecting display member attached to the outer peripheral surface of the socket body, and in a state before the plug is inserted and before the sleeve is displaced in the axial direction, it is engaged with the sleeve and can be detached from the socket body. After the plug is inserted and connected, the sleeve is displaced in the axial direction so that the sleeve is disengaged and the connection display member is removable from the socket body. The socket according to 1 or 2.   The connection display member has an arc-shaped portion that is fitted in a circumferentially extending groove formed on the outer peripheral surface of the socket body, and the arc-shaped portion is configured so that the sleeve is axial before the plug is inserted. The socket according to claim 3, wherein the socket is engaged with the sleeve in a state before being displaced in the direction from the outside in the radial direction.   The socket according to claim 4, wherein the connection display member has a knob that protrudes radially outward from the arcuate fitting portion.   In response to the connection indicating member being removed from the annular groove, a rotation preventing member that protrudes from the outer surface of the socket body and engages with the sleeve to prevent circumferential displacement of the sleeve. The socket according to any one of claims 3 to 5. The first circumferential direction portion includes a terminal portion at a position away from the axial direction portion by a predetermined length in the circumferential direction,
The spring member includes a spring force in the circumferential direction in which the end portion of the first circumferential direction portion is pressed against the holding guide member in a state where the plug is not inserted into the socket. Socket. The second circumferential direction portion includes a terminal portion at a position away from the axial direction portion by a longer distance in the circumferential direction than the first circumferential direction portion,
When the sleeve is displaced in the circumferential direction by the spring member and the holding guide member is positioned in the second circumferential portion, the terminal portion of the second circumferential portion is moved by the spring force of the spring member. The socket according to claim 7, wherein the socket is pressed against the holding guide member.     In a state in which the plug is not inserted into the socket, there is provided circumferential displacement prevention means for preventing the sleeve from being displaced in the circumferential direction toward a position where the open portion of the sleeve is radially aligned with the lock. The socket according to claim 1, wherein the circumferential blocking means is capable of releasing the blocking of the sleeve in the circumferential direction. The circumferential displacement prevention means is
A circumferential displacement prevention member attached to the outer circumferential surface of the socket body so as to be displaceable in the circumferential direction;
A locking member that is provided on the socket body and engages with the circumferential displacement prevention member to prevent displacement in the circumferential direction of the circumferential displacement prevention member;
And the circumferential displacement preventing member engages with the sleeve when the plug is not inserted into the socket and prevents the sleeve from moving in the circumferential direction against the spring force. And a disengagement position that allows the sleeve to move circumferentially against the spring force when disengaged from the obstruction position in the circumferential direction and disengaged from the sleeve. Displaceable,
The socket according to claim 9, wherein the locking member is adapted to engage with the circumferential blocking member when the circumferential blocking member is in the blocking position.   In the state before the sleeve is displaced in the axial direction before the plug is inserted, the circumferential direction displacement preventing member is engaged with the sleeve and cannot be removed from the socket body, and the plug is inserted. The socket according to claim 10, wherein after being connected, the sleeve is disengaged from the socket body by being displaced in the axial direction so that the sleeve is disengaged.   A pipe joint comprising the socket according to claim 1 and a plug inserted and connected to the socket.

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