WO2010143259A1

WO2010143259A1 - Pipe joint

Info

Publication number: WO2010143259A1
Application number: PCT/JP2009/060481
Authority: WO
Inventors: 一憲青木
Original assignee: 日東工器株式会社
Priority date: 2009-06-08
Filing date: 2009-06-08
Publication date: 2010-12-16
Also published as: JP5432997B2; JPWO2010143259A1

Abstract

A pipe joint having a simple structure which is connected by a simple interconnection. A pipe joint having a male pipe joint (12) and a female pipe joint (14). The female pipe joint is provided with an engaging member (26) fitted in an engaging recess (18) in an inserting section (16) of the male pipe joint, which inserting section has been inserted in a receiving section (20) of the female pipe joint, to engage the inserting section (16) with the inside of the receiving section (20). The engaging member (26) has at the front end thereof a fitting projection (30) fitted in the engaging recess (18) of the male pipe joint (12). A peripheral wall of the female pipe joint supports the engaging member (26) such that the engaging member (26) can rock about an intermediate portion (26a) between the front end and the rear end of the engaging member (26). When the inserting section (16) is inserted into the receiving section (20), the rear end of the engaging member (26) moves outward radially to tilt the engaging member (26) in the front-rear direction of the female pipe joint (14). This causes the fitting projection (30) at the front end of the engaging member (26) to be pressed to the inside of the engaging recess (18).

Description

Pipe fitting

The present invention relates to a pipe joint, and more particularly to a pipe joint suitable for connecting a hydrogen storage alloy cartridge as a hydrogen supply source in a fuel cell or the like to the fuel cell.

In recent years, in vehicles using hydrogen-fueled fuel cells, particularly in light vehicles such as wheelchairs and powered bicycles, using hydrogen supply cartridges or tanks incorporating hydrogen storage alloys as means for supplying hydrogen Has been used.

In this type of vehicle, a hydrogen supply cartridge is loaded into a cartridge housing provided in the vehicle, and a hydrogen receiving port of a fuel cell mounted on the vehicle is connected to a hydrogen supply port of the cartridge. ing. In this case, a female pipe joint is provided at the hydrogen receiving port of the fuel cell, a male pipe joint is provided at the hydrogen supply port of the hydrogen supply cartridge, and the male supply joint is simply loaded into the cartridge housing portion. The mold pipe joint is inserted into the female pipe joint, and the lock (locking ball) provided on the female pipe joint is fitted into the locking recess formed on the outer peripheral surface of the male pipe joint. A locking element pressing sleeve slidably mounted on the outer peripheral surface of the pipe joint is displaced on the locking element by a spring force and presses the locking element inward in the radial direction, thereby pressing the locking element in the locking recess. There is one using a so-called one-touch type pipe joint in which both pipe joints are connected to each other. An example of the one-touch type pipe joint is as shown in Patent Document 1.

When removing the hydrogen supply cartridge from the cartridge housing, the operator slides the lock pressing sleeve so that the lock is removed from the lock recess, and the female fitting of the hydrogen supply cartridge is moved to the vehicle side. Must be pulled away from the male fitting. For this reason, there is a problem that the removal operation is difficult and troublesome.

Patent No. 3931176

The present invention has been made in consideration of the above points, and provides a pipe joint that does not bother the above-described operation when connecting or disconnecting, and that enables reliable connection. It is an object.

The present invention
A male pipe joint (12) provided with an insertion portion (represented by reference numeral 16 in the description of the embodiment described below) extending rearward from the tip, at a position closer to the rear than the tip of the outer peripheral surface of the insertion portion. A male pipe fitting (12) comprising a locking recess (18);
A cylindrical female having a receiving portion (20) extending rearward from the front end to receive the insertion portion (16) of the male pipe joint (12) and a front-rear through hole (22) extending to the rear end. A peripheral wall (24) defining the receiving portion, and an engagement of the insertion portion (16) of the male pipe joint that is supported by the peripheral wall and inserted into the receiving portion (20). A female pipe joint (14) comprising a locking member (26) that fits into the locking recess (18) and locks the male pipe joint (12) to the female pipe joint (14);
With
The engaging member (26) is an elastic member extending in the longitudinal direction of the female pipe joint (14), and is fitted to the locking recess (18) of the male pipe joint (12) at the tip. Having a convex part (30),
The peripheral wall of the female pipe joint supports the locking member (26) by an intermediate part (26a) between its front and rear ends, and the insertion part (16) of the male pipe joint (12) is provided. When inserted into the receiving part (20) of the female pipe joint (14), the insertion part (16) advances past the fitting convex part (30), and the locking member (26) The engaging member (26) is inclined in the front-rear direction of the female pipe joint (14) by displacing the rear end of the engaging member (26) radially outward, and the fitting protrusion (30) of the engaging member (26) is inclined. ) Is fitted into the locking recess (18) so as to be pressed.

In this pipe joint, the fitting convex part (30) of the locking member (26) of the female pipe joint (14) is the locking concave part (18) of the insertion part (16) of the male pipe joint (12). When the rear end portion of the locking member is pushed outward in the radial direction, the locking member is inclined so that the fitting convex portion (30) at the tip portion is the locking concave portion. Since it is pressed by (18), the fitting convex part fitted into the locking concave part (18), such as a locking element pressing sleeve, as in the conventional one-touch type pipe joint described above, has a radius. Even if a member such as a sleeve that is pressed from the outside in the direction is not used, the male pipe joint and the female pipe joint can be reliably locked. In addition, since a member such as a sleeve that presses the fitting convex portion fitted into the locking concave portion (18) from the outside in the radial direction is not used, the operator applies a pulling force more than a certain value to the male pipe joint. The male pipe joint can be pulled out from the female pipe joint.

The present invention also provides
A male pipe joint (12) having an insertion part (16) extending rearward from the tip, and having a locking recess (18) at a position closer to the rear than the tip of the outer peripheral surface of the insertion part. (12)
A cylindrical female having a receiving portion (20) extending rearward from the front end to receive the insertion portion (16) of the male pipe joint (12) and a front-rear through hole (22) extending to the rear end. A peripheral wall (24) defining the receiving portion, and an engagement of the insertion portion (16) of the male pipe joint that is supported by the peripheral wall and inserted into the receiving portion (20). A female pipe joint (14) comprising a locking member (26) that fits into the locking recess (18) and locks the male pipe joint (12) to the female pipe joint (14);
With
The engaging member (26) is an elastic member extending in the longitudinal direction of the female pipe joint, and a fitting convex part (fitting) fitted into the engaging concave part (18) of the male pipe joint (12) at the tip. 30)
The peripheral wall (24) of the female pipe joint (14) is a fulcrum (in the embodiment described below, a cylindrical body) that supports the locking member (26) at an intermediate point between its front and rear ends. 44 having a triangular cross-section formed on the inner peripheral surface of 44, and an annular convex edge portion (44b) of the holding wall portion (44a) that engages with the upper surface of the locking member (26), The insertion part (16) of the male pipe joint (12) is inserted into the receiving part (20) of the female pipe joint (14), and the fitting convex part (30) of the locking member (26) In the stage before fitting into the locking recess (18), the fitting projection (30) is displaced radially outward by the insertion portion (16), and the fulcrum (44b) of the locking member (26). ) And the rear end of the locking member (26) is displaced radially outward so that the locking member Of the point (44b) to provide a pipe joint which is adapted deflect rear end radially outward.

In this pipe joint, in the stage before the fitting convex part (30) of the locking member (26) is fitted into the locking concave part (18), the locking member (44b) is used as a center. 26) Since the rear end side of the locking member (26) needs to be pushed out and deflected radially outward in a state where the front end side of 26) is curled outward in the radial direction, work for connecting pipe joints The person feels a large resistance force, and the front end side of the locking member (26) receives a rotational moment generated when the rear end side is deflected outward in the radial direction, so that the fitting convex portion (30) is engaged. The locking recess (18) is fitted with a strong force, and when the fitting projection (30) is fitted into the locking recess (18), a loud sound or a feeling of impact can be obtained. Since it is possible, more clearly confirm that the coupling of the pipe joint is complete Theft is possible.

Specifically, the locking member (26) in the pipe joint according to the first aspect of the present invention is substantially the same as the longitudinal axis of the female pipe joint (14) from the front end to the rear end. Extrusion adapted to extend in parallel, the fitting projection (30) extending radially inward at the distal end of the locking member (26) and extending radially inward to the rear end of the locking member (26) And the pushing portion (32) is inserted into the receiving portion (20) of the female fitting (14) of the insertion portion (16) of the male fitting (12). A force in the radially outward direction is received, whereby the rear end of the locking member is displaced radially outward, and the fitting protrusion (30) at the tip of the locking member (26) is used for the locking. It can be pressed into the recess (18). By doing in this way, in the stage before the fitting convex part (30) of a latching member is fitted by the recessed part (18) for latching, the fitting convex part (30) of a latching member is radial direction. Since the inner pressing force is received, the fitting convex portion (30) is fitted into the locking concave portion (18) with a large force, and a large sound or impact feeling can be obtained. It becomes possible to confirm more clearly that the connection of is completed. .

The peripheral wall (24) of the female pipe joint in the pipe joint according to the first aspect of the present invention is as follows.
A support wall (42b) that supports an intermediate portion (26a) between the front end and the rear end of the locking member (26) from the radially inner side;
On the distal end side of the female pipe joint, adjacent to the support wall portion (26b), penetrates the peripheral wall inward in the radial direction, and the fitting convex portion (30) of the locking member (26) is the receiving portion (20). A distal end side through hole (42c) extending radially inward to the inside,
On the rear end side of the female pipe joint, adjacent to the support wall portion (26b), penetrates the peripheral wall radially inward, and the pushing portion (32) of the locking member (26) is the receiving portion (20). A rear end side through opening (42d) extending radially inward to the inside,
A holding wall portion (in the same embodiment, an annular formed on the inner peripheral surface of the cylindrical member (44) constituting the peripheral wall) provided on the outer side in the radial direction of the support wall portion (42b) and separated from the support wall portion. A convex portion (44a)),
Have
When the insertion part (16) of the male pipe joint is inserted into the receiving part (20) of the female pipe joint, the locking member has its intermediate part (26a) and the holding wall part (42b). The fitting projection (30) of the locking member (26) before being engaged with the locking recess (18) is held from the receiving portion (20) while being held between the wall (44a). The push-out portion (32) of the locking member (26) is radiused at the time when the fitting convex portion (30) is fitted into the locking concave portion (18). The locking member (26) is inclined in the front-rear direction by being pushed outward in the direction, and the fitting protrusion (30) can be pressed into the locking recess (18).

In this case, specifically, the female pipe joint (14) includes a cylindrical female main body (40) having a front-rear direction through hole (22), and a distal end portion (42) of the female main body. And a cylindrical member (44) attached around the outer peripheral surface of the tip side portion around the support wall portion (42b), the tip side through hole (42c) of the peripheral wall (24), and the rear The end side through hole (42d) can be formed in the female main body (40), and the holding wall portion (44a) can be formed in the tubular member (44).

The female pipe joint (14) in the pipe joint according to the first and second aspects of the present invention has an extrusion member (50) provided in the front-rear direction through-hole so as to be displaceable in the front-rear direction. The member is pushed backward by the insertion part (16) of the male pipe joint (12) inserted into the receiving part (20) of the female pipe joint, whereby the pushing part (32) of the locking member (26). And the extruded portion can be pushed out radially outward.

In addition, an annular first seal member (66) provided so that the female pipe joint (14) surrounds the front-rear direction through hole (22) on the peripheral wall of the front-rear direction through hole (22), and a front-rear direction through hole ( 22) having a first valve member (62) which is set in the inner side, is biased toward the distal end, and is sealingly engaged with the annular first seal member (66),
A male pipe joint (12) is provided with a second front-rear direction through hole (68) and an annular shape provided on a peripheral wall of the second front-rear direction through hole (68) so as to surround the second front-rear direction through hole. The second seal member (64) and the second front-rear direction through hole (68) are set, urged toward the distal direction, and hermetically engaged with the annular second seal member (64). A second valve member (60)
When the fitting projection (30) of the locking member (26) is fitted into the locking recess (18), the pushing member (50) is moved to the first and second valve members (62, 60) and away from the first and second seal members, the front and rear through hole (22) of the female pipe joint and the second front and rear through hole (68) of the male pipe joint. Can communicate with each other.

Specifically, the extruding member (50) includes an elongated front end side extension portion (50a) and a rear end side extension portion (50b) on the front end and rear end sides thereof, and the front end side extension portion and the rear end side extension portion. And a communication hole (50e) penetrating in the front-rear direction, and when the fitting projection (30) of the locking member is fitted into the locking recess (18), the rear end side extension portion (50b) and the distal end side extension (50a) slide through the first and second seal members (64, 66) and engage with the first and second valve members (62, 60), respectively. The through hole (22) of the female pipe joint and the second front through hole (68) of the male pipe joint are communicated through the communication hole (50e). it can. In this case, it is possible to reduce the volume of the communication hole (50e) by reducing the diameter of the communication hole (50e), and accordingly, the first and second bubble members (62, 60) are formed by the pushing member (50). Is separated from the first and second sheet members (64, 66) so that the front-rear direction through hole (22) of the female pipe joint and the second front-rear direction through hole (68) of the male pipe joint communicate with each other. When this is done, the amount of air that enters the fluid conduit including the front-rear direction through holes (22, 68) can be suppressed to a small amount of air in the communication hole. That is, in a hydrogen supply path as a fuel supply path of a fuel cell or the like, it is required to reduce air contamination as much as possible when connecting pipe joints, but the above configuration makes it possible.

More specifically, the pusher member (50) is engaged with the male pipe fitting when the insertion part (16) of the male pipe fitting is inserted into the receiving part (20) of the female main body. A male pipe engaging member (80) is provided, and when the male pipe joint is pulled out from the female pipe joint, the male pipe joint is moved together with the male pipe joint, and the rear end side extension (50b) is the first. It can be withdrawn from the seal member (66). Even if adhesion between the first seal member (66) and the rear extension portion (50b) occurs, the first extension member (50b) is forcibly removed by forcing the rear extension portion (50b) off. 66).

Specifically, the male pipe joint engaging member includes an arm (80) extending in the distal direction of the female main body, and the arm is displaced radially inward when the male pipe joint is inserted. Thus, the male pipe joint can be engaged with the outer peripheral surface.

The locking member (26) can be formed of a plate spring member elongated in the front-rear direction of the female pipe joint (14). By using the plate spring member, when the fitting projection (30) of the locking member (26) is fitted into the locking recess (18) of the male pipe joint (12), the locking recess ( 18) and can be set so as to fit with no backlash.

In this case, the pressing portion (32) of the locking member is formed by bending the rear end portion of the plate-like spring member, and has an inclined surface (32a) that is inclined radially inward as the pushing portion moves rearward. Thus, the inclined surface (32a) is engaged with the pushing member (50), and the pushing member (50) pushed backward is slidably engaged with the inclined surface (32a) while the pushing portion (32) is moved. It can be gradually pushed outward in the radial direction. By doing in this way, when inserting a male pipe joint (12), resistance with respect to it can be made to become large gradually. Further, when the fitting projection (30) is disengaged from the locking recess (18) of the male pipe joint when the male pipe joint (12) is pulled out, the pushing portion (32) of the locking member is By means of the elastic force, the male pipe joint (12) can be pressed in the pull-out direction via the inclined surface (32a), and the pull-out can be easily performed.

In addition, a plurality of pushing portions (32) of the locking member (26) are provided at equal intervals in the circumferential direction of the peripheral wall (24) of the female pipe joint (14), and the pushing portion (32) is inclined. The surface (32a) can be engaged with the pushing member (50) at intervals in the circumferential direction. By doing so, the pushing portion (32) of the locking member (26) is engaged so as to surround the pushing member (50) from the periphery thereof, so that the female die of the male pipe fitting (12) is engaged. The movement of the push-out member (50) accompanying insertion and extraction with respect to the pipe joint (14) can be made smooth.

Hereinafter, an embodiment of a pipe joint according to the present invention will be described with reference to the accompanying drawings.

It is a longitudinal cross-sectional view which shows the pipe joint concerning the 1st Embodiment of this invention, Comprising: The male pipe joint and the female pipe joint are shown in the state removed. It is a longitudinal cross-sectional view which shows the pipe joint which concerns on 1st Embodiment, Comprising: The state which started inserting the male pipe joint in the female pipe joint is shown. It is a longitudinal cross-sectional view which shows the pipe joint which concerns on 1st Embodiment, Comprising: The state which further inserted the male pipe joint in the female pipe joint is shown. It is a longitudinal cross-sectional view which shows the pipe joint which concerns on 1st Embodiment, Comprising: The state which further inserted the male pipe joint in the female pipe joint is shown. It is a longitudinal cross-sectional view which shows the pipe joint which concerns on 1st Embodiment, Comprising: The male pipe joint has shown the state connected with the female pipe joint. The disassembled perspective view of the female pipe joint of the pipe joint which concerns on 1st Embodiment is shown. It is a longitudinal cross-sectional view of the pipe joint which concerns on the 2nd Embodiment of this invention, Comprising: The male pipe joint and the female pipe joint are shown in the removed state. It is a longitudinal cross-sectional view which shows the pipe joint concerning 2nd Embodiment, Comprising: The state which began to insert the male pipe joint in the female pipe joint is shown. It is a longitudinal cross-sectional view which shows the pipe joint concerning 2nd Embodiment, Comprising: The state which further inserted the male pipe joint in the female pipe joint is shown. It is a longitudinal cross-sectional view which shows the pipe joint concerning 2nd Embodiment, Comprising: The male type pipe joint has shown the state connected with the female type pipe joint.

The pipe joint 10 according to the present invention has a male pipe joint 12 and a female pipe joint 14. The male pipe coupling 12 includes an insertion portion 16 that extends rearward from the distal end thereof, and a locking recess 18 is provided at a position closer to the rear than the distal end of the outer peripheral surface of the insertion portion. The female pipe joint 14 includes a receiving part 20 that extends rearward from the distal end in order to receive the insertion part 16 of the male pipe joint 12, and has a front-rear direction through-hole 22 that penetrates in the front-rear direction. The female pipe joint 14 is also supported by the peripheral wall 24 that defines the receiving part 20 and is fitted into the locking recess 18 of the insertion part 16 of the male pipe joint 12 inserted into the receiving part 20 (see FIG. 5) A locking member 26 for locking and connecting the male pipe joint 12 to the female pipe joint 14 is provided.

The locking member 26 bends an elongated plate-like spring member to form a fitting convex portion 30 that fits into the locking concave portion 18 of the male pipe joint 12 at the tip portion thereof, and details at the rear end portion thereof later. The extrusion part 32 to be described is formed. A plurality of the locking members 26 are preferably provided at equal intervals in the circumferential direction of the peripheral wall 24. In the illustrated embodiment, two locking members 26 are provided at positions facing each other in the diametrical direction.

The female pipe joint 14 includes a cylindrical female main body 40 (FIG. 6) and a front end side portion (in the illustrated example, a substantially half portion on the front end side of the female main body) 42. And a cylindrical member 44 provided to surround the outer periphery.

The front end portion 42 is formed on the support wall portion 42b having a support groove 42a for supporting the intermediate portion 26a between the front end and the rear end of the locking member 26, and on the support wall portion 42b on the front end side of the female pipe joint 14. The front end side through-hole 42c provided so as to pass through the female mold body 40 in the radial direction and the female mold body 40 adjacent to the support wall 42b on the rear end side of the female pipe joint 14 And a rear end side through-hole 42d provided so as to penetrate in the radial direction.

The front end side through hole 42c allows the fitting convex portion 30 of the locking member 26 to extend radially into the receiving portion 20 of the front-rear direction through hole 22 of the female pipe joint 14. The rear end side through-hole 42d allows the pushing portion 32 of the locking member 26 to extend radially into the front-rear direction through-hole 22. Specifically, the front end side through hole 42c and the rear end side through hole 42d are formed by providing

notches

42h and 42i (FIG. 6) in the tangential direction before and after the support wall portion 42b in the cylindrical front end side portion 42. Has been.

The cylindrical member 44 has a distal end fixed to the outer peripheral surface of the distal end portion 42f of the distal end side portion 42 of the female main body 40, and a rear end thereof adjacent to the rear side of the distal end side portion 42 in the female main body 40. The formed annular step 40a is fitted. On the inner peripheral surface of the cylindrical member 44, there is an annular convex portion 44a having a trapezoidal cross section that is opposed to and close to the support groove 42a in the support wall portion 42b of the female main body 40.

Annular spaces

44b and 44c are formed to allow a fitting convex portion 30 and a pushing portion 32 of the locking member 26 described later to be pushed outward in the radial direction. The distance between the inner peripheral surface of the annular convex portion 44a and the bottom surface of the support groove 42a is larger than the radial thickness of the locking member 26 supported in the support groove 42a. Although this interval will be described later, the insertion part 16 of the male pipe joint 12 is inserted into the receiving part 20 of the female pipe joint 14, and the fitting convex part 30 of the locking member 26 becomes the female pipe joint 14. When the locking recess 18 is fitted, the pushing portion 32 of the locking member 26 is pushed outward in the radial direction, and the locking member 26 is inclined in the front-rear direction as a whole (see FIG. 5). ) To allow the fitting projection 30 to be pressed into the locking recess 18. Further, in the stage before the insertion portion 16 of the male pipe joint 12 is inserted into the receiving portion 20 of the female pipe joint 14 and the fitting convex portion 30 is fitted into the locking concave portion 18, The fitting convex part 30 and the pushing part 32 of the stop member 26 are pushed out radially outward so that the locking member 26 can be formed into an arcuate shape as a whole (see FIG. 4).

When the insertion part 16 of the male pipe joint 12 is inserted into the receiving part 20 of the female pipe joint 14, the female pipe joint 14 engages with the pushing part 32 of the locking member 26 and has a radius. An extruding member 50 for extruding outward in the direction is provided. The pushing member 50 is slidably attached in the front-rear direction through-hole 22 of the female pipe joint 14 in the front-rear direction, and the insertion portion 16 of the male pipe joint 12 is inserted into the female pipe joint 14. In the absence, the position is as shown in FIG. When the insertion part 16 of the male pipe joint 12 is inserted into the receiving part 20 of the female pipe joint 14, it is pushed backward by the insertion part 16, and accordingly, the pushing part 32 of the locking member 26 is radiused. Push outward in the direction. As shown in FIG. 6 and FIGS. 1 to 5, the push-out member 50 has a pair of upper and lower through holes provided in a direction orthogonal to the longitudinal axis of the female pipe joint (the upper through hole in FIG. 6). The

50g, 50h is passed through the through-hole, and the tip portions of the

pins

50a, 50b protruding from the pushing member 50 on both sides are

notches

42h, 42i. Are in contact with the

bottom surfaces

42j, 42k.

In the illustrated embodiment, an elongated front end side extending portion 50a and a rear end side extending portion 50b are provided at substantially the center position in the radial direction of the front and rear surfaces of the pushing member 50, and the insertion portion of the male pipe joint 12 is provided. When 16 is inserted into the receiving part 20 of the female pipe joint 14, the front end side extension part 50 a and the rear end side extension part 50 b are respectively ball-type valve members of the male pipe joint 12 and the female pipe joint 14. 60 and 62, and the valve member is separated from the annular seal members 64 and 66 (FIG. 5), and the front and rear direction through hole 68 of the male pipe joint 12 and the front and rear direction through hole of the female pipe joint 14 are separated. 22 is communicated. Specifically, a seal member 64 is provided on the peripheral wall of the front-rear direction through hole 68 of the male pipe joint 12 so as to surround the through hole 68, and the valve member 60 is attached to the seal member 64. It is pressed by a compression coil spring 72 as a biasing member. Similarly, a seal member 66 is provided on the peripheral wall of the front-rear direction through-hole 22 of the female pipe joint 14 so as to surround the through-hole 22 and is pressed by a compression coil spring 74 as an urging member. It has become. The

seal members

64 and 66 are fixed by

cylindrical stoppers

76 and 78, respectively.

In the illustrated embodiment, the pushing portion 32 of the locking member 26 bends the rear end portion of the plate-like spring member elongated in the front-rear direction of the female pipe joint 14 inward, and then bends it forward. It has the inclined surface 32a engaged with the pushing member 50 so that the front-end | tip contacts the intermediate part 26a of the said locking member. For this reason, as the pushing member 50 is pushed rearward, the pushing portion 32 at the rear end of the locking member 26 is gradually pushed outward in the radial direction, and gradually receives a large resistance force.

Further, in the illustrated embodiment, the pusher member 50 is provided with a plurality of arms 80 extending in the distal direction from positions spaced along the radially outer peripheral edge thereof, as shown more clearly in FIG. Yes. The arm 80 is slightly inclined radially outward from the base end toward the tip, and engages with an annular groove 42g formed on the inner peripheral surface of the support wall portion 42b. The part 82 is provided inward in the radial direction.

The extrusion member 50 is formed with a small-diameter communication hole 50e that passes from the front end to the rear end through the front end side extension portion 50a and the rear end side extension portion 50b. The front end side extension portion 50a and the rear end side extension portion 50b

Notches

50c and 50d as shown in FIG. 6 (particularly, 50c is clearly shown in FIG. 6) are formed at the tip portion.

In the above-described pipe joint, in order to connect the male pipe joint 12 and the female pipe joint 14, when the insertion part 16 of the male pipe joint 12 starts to be inserted into the receiving part 20 of the female pipe joint 14, The fitting convex part 30 of the locking member 26 in the mold pipe joint 14 is pushed outward in the radial direction by the outer peripheral surface of the insertion part 16 of the male pipe joint 12. At this time, the intermediate portion of the locking member 26 is engaged with the annular convex portion 44a of the tubular member 44 of the female pipe joint 14, and the distal end portion of the locking member 26 warps outward in the radial direction. 12 can be inserted into the receiving portion 20. When the insertion part 16 of the male pipe joint 12 is inserted into the receiving part 20 of the female pipe joint 14 by a predetermined length, the fitting convex part 30 is formed on the outer peripheral surface of the male pipe joint 12. It fits into the locking recess 18.

When the insertion portion 16 of the male pipe joint 12 is inserted into the receiving portion 20 of the female pipe joint 14, the insertion section 16 advances into an arm 80 provided in the circumferential direction of the pushing member 50 (see FIG. 3, 4), and at the same time, the distal end side extended portion 50 a of the pushing member 50 enters the front-rear direction through hole 68 of the male pipe joint 12 and relatively engages with the inner peripheral surface of the annular seal 64 while slidingly engaging. The pushing member 50 is pushed rearward due to the sliding resistance in the annular seal 64. As the push-out member 50 is pushed rearward, the arm 80 slides on the inner peripheral surface of the support wall portion 42b, exits from the annular groove 42g and is displaced radially inward, and the engagement convex portion 82 at the tip thereof. Enters the annular recess 90 formed on the outer peripheral surface of the distal end portion of the insertion portion 16 of the male pipe joint. Further, when the insertion of the insertion part of the male pipe joint 12 into the receiving part 20 of the female pipe joint proceeds, the distal end surface of the male pipe joint 12 engages with the pushing member 50, and the pushing member 50 is moved. Push backwards. At this time, the fitting convex part 30 of the locking member 26 is pushed out radially outward by the insertion part 16 of the male pipe joint, and the locking member 26 is not clearly shown in the figure, The push-out member 50 is inclined in the front-rear direction, and the push-out member 50 receives the resistance of the push-out portion 32 strengthened by the radially inward displacement of the push-out portion 32 of the locking member due to the inclination. The portion 32 is pushed outward in the radial direction, and the rear end side extended portion 50 b advances into the annular seal member 66 of the female pipe joint 14. Further, when the front end and the rear end of the locking member 26 are pushed outward in the radial direction, the locking member 26 is bent in a bow shape as a whole (FIG. 4), and the front end is radially outward. The pushing member 50 pushes the pushing portion 32 at the trailing end outward in the radial direction in a state where the rotational moment relating to the locking member 26 is transmitted to the trailing end due to the pushing at the pushing member 32. The force for extruding, and thus the resistance force against the pushing of the pushing member 50 becomes larger. The operator inserts the male pipe joint 12 into the female pipe joint 14 while feeling a relatively large resistance force with the sliding force by the

seal members

64 and 66 simultaneously with the resistance force by the pushing portion 30. As a result, when the fitting convex portion 30 of the locking member 26 finally reaches a position where it is aligned with the locking concave portion 18 on the outer peripheral surface of the male pipe joint 12, the fitting convex portion 30 is moved to the locking member. It is fitted into the locking recess 18 by the elastic force of 26. In this case, since the rear end of the locking member 26 is pushed outward in the radial direction, the rotation moment generated in the locking member 26 acts on the front end of the locking member. The portion 30 is fitted to the locking recess 18 with a stronger force than when such a rotational moment is not acting, and thus a large impact sound and a feeling of impact can be obtained.

In this state, the front end side extended portion 50a and the rear end side extended portion 50b of the pushing member 50 are engaged with the ball-

type valve members

60 and 62, respectively, and the bubble members are separated from the

annular seal members

64 and 66. Thereby, the front-rear direction through

holes

68 and 22 of the male pipe joint 12 and the female pipe joint 14 are communicated with each other through the communication hole 50e penetrating the pushing member 50 in the front-rear direction. The diameter of the communication hole 50e is small, and the amount of air mixed into the pipe line including the front-rear direction through

holes

68 and 22 communicated through the communication hole can be small.

In a state where the fitting convex portion 30 is fitted in the locking concave portion 18, the pushing portion 32 of the locking member 26 is pushed outward in the radial direction so that the locking member 26 is inclined in the front-rear direction as a whole. A force is applied so that the fitting convex portion 30 at the front end is pushed into the locking concave portion.

When the male pipe joint 12 connected is removed from the female pipe joint, if the male pipe joint 12 is pulled out from the male pipe joint 14, the pushing member 50 is connected to the male pipe joint via the arm 80. 12 is pulled in the pulling direction so that the arm returns to a position where it engages with the annular groove 42g, and the arm 80 is displaced outwardly to disengage from the male pipe joint. As described above, the male pipe joint is connected to the female pipe. The male pipe joint is finally pulled out from the female pipe joint through the reverse stage of insertion into the joint. At this time, in a state where the fitting convex portion 30 of the locking member 26 is disengaged from the locking concave portion 18 of the male pipe joint, the male pipe joint is pulled out from the inclined surface of the pushing portion 32 of the locking member 26. Since the pushing force in the direction is received, the operator can pull out the male pipe joint with a smaller force.

7 to 11 show a pipe joint 10 according to the second embodiment. The pipe joint 10 according to the second embodiment is basically the same as the first pipe joint except for the following points. That is, in this pipe joint, the annular convex portion 44a formed on the inner peripheral surface of the cylindrical member 44 has a triangular cross section, and the annular convex edge portion 44d abuts on the locking member 26. Yes. In this annular joint 10, when the male pipe joint 12 is inserted into the female pipe joint 14, as with the pipe joint according to the first embodiment, the insertion portion 16 of the male pipe joint 12 First, the fitting convex portion 30 of the locking member 26 is pushed out in the radial direction, the insertion of the insertion portion 16 proceeds, and the fitting convex portion 30 is fitted into the locking concave portion 18 of the male pipe joint 12. In the previous stage, as shown in FIG. 9, in addition to the fitting convex portion 30, the pushing portion 30 is also pushed outward in the radial direction. In this state, the locking member 26 is in a state of supporting the locking member 26 with the annular convex edge portion 44d on the inner periphery of the cylindrical member 44 serving as a fulcrum of the locking member 26. Pushing the fitting convex portion 30 at the tip of the member outward in the radial direction applies a rotational moment in the counterclockwise direction as viewed in the figure to the pushing portion 32 at the rear end of the locking member. Therefore, a large force is required to push the male pipe joint 12 into the female pipe joint 14 while pushing the pushing portion 32 outward in the radial direction. On the contrary, since the pushing portion 32 is pushed outward in the radial direction with a large force, the locking member 26 is subjected to a rotational moment in the clockwise direction. Therefore, also in this pipe joint, according to the first embodiment. Similarly to the pipe joint, when the fitting convex part 30 is fitted into the locking concave part 18, the fitting sound at that time becomes loud, so that the operator can connect the male pipe joint to the female pipe. It can be possible to reliably recognize that it is coupled to the joint.

The embodiment of the pipe joint according to the present invention has been described above, but the present invention is not limited to this. For example, the peripheral wall 24 of the female pipe joint that supports the locking member 26 only needs to support the locking member so as to be swingable around the intermediate portion 26a as described above. As in the embodiment, the cylindrical member 44 is not necessarily required. In addition, for the convenience of explanation, the male pipe joint has been described as being inserted into the female pipe joint. However, the female pipe joint can be moved relative to the male pipe joint to couple them together. Of course.

Pipe joint 10; male pipe joint 12; female pipe joint 14; insertion portion 16; locking recess 18; receiving portion 20; front and rear direction through hole 22; peripheral wall 24; locking member 26; Means 28; fitting convex part 30; push-out part 32; inclined surface 32a; female mold body 40; annular step part 40a; tip side part 42; support groove 42a: support wall part 42b; Cylindrical member 44; annular convex portion 44a; annular convex edge portion 44b; push-out member 50; distal end side extended portion 50a; rear end side extended portion 50b;

notches

50c and 50d;

Valve members

60 and 62;

seal members

64 and 66; longitudinal through-hole 68; compression coil springs 72 and 74;

stoppers

76 and 78; arm 80;

Claims

A male pipe joint including an insertion portion extending rearward from the tip, the male pipe joint including a locking recess at a position closer to the rear than the tip of the outer peripheral surface of the insertion portion;
A female pipe joint having a receiving part extending rearward from the tip for receiving the insertion part of the male pipe joint and having a front-rear direction through-hole penetrating in the front-rear direction, the receiving of the female pipe joint The male pipe fitting is inserted into the receiving portion by being fitted to the locking recess of the male pipe fitting insertion portion that is supported by the peripheral wall defining the portion and inserted into the receiving portion. A female pipe joint having a locking means including a locking member to be
With
The locking member is an elastic member extending in the longitudinal direction of the female pipe joint, and has a fitting convex part that fits into the locking concave part of the male pipe joint at the tip.
The peripheral wall of the female pipe joint supports the locking member so as to be swingable around an intermediate portion between the front end and the rear end, and the insertion part of the male pipe joint is the female pipe joint. The rear end of the locking member is displaced radially outward to incline the locking member in the front-rear direction of the female pipe joint, and the front end of the locking member A pipe joint in which a fitting convex portion is pressed into the locking concave portion.
A male pipe joint including an insertion portion extending rearward from the tip, the male pipe joint including a locking recess at a position closer to the rear than the tip of the outer peripheral surface of the insertion portion;
A female pipe joint having a receiving part extending rearward from the tip for receiving the insertion part of the male pipe joint and having a front-rear direction through-hole penetrating in the front-rear direction, the receiving of the female pipe joint The male pipe fitting is inserted into the receiving portion by being fitted to the locking recess of the male pipe fitting insertion portion that is supported by the peripheral wall defining the portion and inserted into the receiving portion. A female pipe joint having a locking means including a locking member to be
With
The locking member is an elastic member extending in the longitudinal direction of the female pipe joint, and has a fitting convex part that fits into the locking concave part of the male pipe joint at the tip.
The peripheral wall of the female pipe joint has a fulcrum that supports the locking member at an intermediate point between the front end and the rear end thereof, and the insertion part of the male pipe joint is in the receiving part of the female pipe joint. In the stage before the fitting projection of the locking member is fitted into the locking recess, the insertion portion is displaced radially outward by the insertion portion, and the distal end side of the fulcrum of the locking member. A pipe joint in which the rear end of the locking member is displaced radially outward so that the rear end side of the locking member is bent outward in the radial direction.
The locking member extends from the front end to the rear end substantially parallel to the longitudinal axis of the female pipe joint, and the fitting convex portion is radially inward at the front end of the locking member. And a pushing portion extending radially inwardly at the rear end of the locking member. When the insertion portion of the male fitting is inserted into the receiving portion of the female fitting, the insertion portion is first moved by the insertion portion. In the stage before the fitting projection is displaced radially outward by receiving a force in the radially outward direction, and the fitting projection of the locking member is fitted into the locking recess, the locking projection When the extruded portion of the member receives a force radially outward and is displaced radially outward, and the fitting convex portion is fitted into the locking concave portion, the inserting portion causes the extruded portion to be radial. The pipe joint according to claim 1, wherein the pipe joint is pushed outward.
The peripheral wall of the female pipe joint is
A support wall portion that supports an intermediate portion between the front end and the rear end of the locking member from the inside in the radial direction;
The female pipe joint penetrates the peripheral wall radially inwardly adjacent to the support wall on the distal end side of the female pipe joint, and the fitting convex portion of the locking member extends radially inward to the receiving portion. The front end side through-hole,
The rear end side of the female pipe joint is adjacent to the support wall portion and penetrates the peripheral wall radially inward so that the pushing portion of the locking member extends radially inward to the receiving portion. A rear end side through-hole,
A restraining wall portion provided on the radially outer side of the support wall portion and spaced from the support wall portion;
Have
When the insertion part of the male pipe joint is inserted into the receiving part of the female pipe joint, the locking member is held between the support wall part and the holding wall part while the intermediate part is held. The pipe joint according to any one of claims 1 to 3, wherein the inclination of the locking member is made possible.
The female pipe joint has a cylindrical female main body having the front-rear direction through hole, and an inner circumference attached to the outer circumference of the distal end portion of the female main body and spaced from the outer circumferential surface of the distal end portion. A cylindrical member having a surface,
The supporting wall portion, the front end side through-hole and the rear end side through-hole of the peripheral wall are formed in the front end side portion of the female main body, and the holding wall portion is formed in the inner peripheral surface of the cylindrical member. The pipe joint according to claim 4.
The female pipe joint has an extruding member provided in the front-rear direction through-hole so as to be displaceable in the front-rear direction, and the extruding member is inserted into the receiving part of the female pipe joint. The pipe joint according to claim 1 or 2, wherein the pipe joint is configured to be pushed rearward by the insertion portion so as to engage with the pushing portion of the locking member and push the pushing portion radially outward.
An annular first seal member is provided in the peripheral wall of the front-rear direction through hole so as to surround the front-rear direction through hole, and the female pipe joint is set in the front-rear direction through hole, and is attached toward the distal end. A first valve member biased and sealingly engaged with the annular seal member;
The male pipe joint has a second front-rear direction through-hole, an annular second seal member provided on a peripheral wall of the second front-rear direction through-hole so as to surround the front-rear direction through-hole, A second valve member set in the front-rear direction through-hole, biased toward the distal end direction, and hermetically engaged with the annular seal member;
When the fitting convex portion of the locking member is fitted into the locking concave portion, the pushing member engages with the first and second valve members, and the first and second seal members are engaged. 7. The pipe joint according to claim 6, wherein the front-rear direction through hole of the female pipe joint and the second front-rear direction through hole of the male pipe joint are communicated with each other.
The extruding member has an elongated distal end extension portion and a rear end extension portion elongated on the distal end side and the rear end side thereof, and a communication hole passing through the distal end extension portion and the rear end extension portion in the front-rear direction. And the rear end side extension part and the front end side extension part slide the first and second seal members, respectively, when the fitting convex part of the locking member is fitted into the locking recess part. It moves through and engages with the first and second valve members, and communicates with the through-holes in the front-rear direction of the female pipe joint and the male pipe joint through the communicating portion. The pipe joint according to claim 7.
The pushing member has a male fitting engaging member that is engaged with the male fitting when the insertion portion of the male fitting is inserted into a receiving portion of the female fitting. 9. The pipe joint according to claim 8, wherein when the male pipe joint is pulled out from the female pipe joint, the male pipe joint is moved together with the male pipe joint so that the rear end side extension portion is pulled out from the first seal portion. .
The male pipe joint engaging member includes an arm extending in a distal direction of the female pipe joint, and the arm is displaced radially inward when the male pipe joint is inserted, so that the male pipe The pipe joint according to claim 9, wherein the pipe joint is adapted to engage with an outer peripheral surface of the joint.
The pipe joint according to any one of claims 1 to 10, wherein the locking member is formed of a plate spring member elongated in the front-rear direction of the female pipe joint.
The pressing portion of the locking member is formed by curving the rear end portion of the plate-like spring member, and has an inclined surface that inclines radially inward toward the rear, and the inclined surface engages with the pushing member. The pipe joint according to claim 11, wherein the pushing member pushed rearward is configured to gradually push the pushing portion radially outward while slidingly engaging the inclined surface.
A plurality of the locking members are provided at equal intervals in the circumferential direction of the peripheral wall of the female pipe joint, and the inclined surface of the pushing portion of the locking member is spaced apart from the pushing portion in the circumferential direction. The pipe joint according to claim 12, which is adapted to be engaged with each other.