JP4762119B2 - Fitting - Google Patents

Description

  The present invention relates to a joint including a male nose and a female body provided with a flow path portion.

  2. Description of the Related Art Conventionally, as a joint between hoses for transferring a liquid such as beer, a joint including a male nose and a female body provided with a flow path portion is known.

  FIG. 9 shows a half-cut sectional view of a conventionally known joint composed of a nose and a body. Further, FIG. 10 shows a half-cut cross-sectional view in a state where the nose and the body are connected. 9 and 10, the nose and the half cut section of the body are shown upside down for easy understanding. The nose has a half cut section on the left side in the figure, and the body has a half cut section on the right side in the figure. .

  As shown in FIG. 9, the joint 100 includes a body 102 that is a female metal fitting and a nose 120 that is a male metal fitting. The body 102 is formed with a concave insertion portion 104 into which the nose 120 is inserted. A circumferential groove 106 is formed on the inner peripheral wall of the concave insertion portion 104, and a lock ring 110 is disposed in the circumferential groove 106. A shallow groove portion 108 formed shallower than the circumferential groove 106 is formed at a position adjacent to the circumferential groove 106. The lock ring 110 has one end portion 110A extending in a direction orthogonal to the axial direction, and the other end portion (not shown) as a free end, so that the diameter can be reduced. In addition, a channel portion 112 that communicates with the concave insertion portion 104 is formed in the core portion of the body 102. A cover 114 that covers one end 110 </ b> A of the lock ring 110 is externally inserted on the outer peripheral surface of the body 102.

  On the other hand, the nose 120 has a smaller diameter toward the tip portion 122, and a circumferential groove 124 into which the lock ring 110 is fitted is formed on the circumferential surface. Further, circumferential grooves 126 and 128 are respectively formed on the front end side and the rear side from the circumferential groove 124, and O-rings 130 and 132 are provided in the circumferential grooves 126 and 128, respectively. A channel portion 134 is formed in the core portion of the nose 120.

As shown in FIG. 10, when the nose 120 is inserted into the concave insertion portion 104 of the body 102, the lock ring 110 is fitted into the circumferential groove 124 of the nose 120. In this state, a liquid such as beer can flow through the flow path portion 112 of the body 102 and the flow path portion 134 of the nose 120. At that time, when an internal pressure is applied to the joint 100, the joint moves slightly in the direction in which the nose 120 comes out, and the lock ring 110 moves to the shallow groove portion 108, thereby locking the nose 120 so as not to come out of the concave insertion portion 104 ( For example, see Patent Document 1).
JP 2005-147289 A

  However, since the joint 100 shown in FIG. 10 connects the nose 120 to the concave insertion portion 104 of the body 102 with a one-touch structure, the insertion of the nose 120 into the concave insertion portion 104 may be insufficient. If the nose 120 and the body 102 are not sufficiently inserted due to insufficient insertion of the nose 120, the liquid may be ejected vigorously from between the nose 120 and the body 102, and the surroundings may be contaminated with liquid. .

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a joint that can suppress the ejection of fluid even when the connection between the nose and the body is insufficient.

In order to solve the above-mentioned problem, a joint according to the invention described in claim 1 includes a nose connected to one pipe and a body connected to the other pipe and having a concave insertion portion into which the nose is inserted. A locking member that is provided in the concave insertion portion and that engages a groove formed on an outer peripheral surface of the nose when the nose is inserted into the concave insertion portion; and When the lock member is engaged with the groove, the channel member is pushed by the tip of the nose to release the flow channel, and when the lock member is disengaged from the groove. A movement valve that moves in a direction to close the flow path portion by the fluid pressure of the fluid flowing through the flow path portion, and a protrusion formed on a wall portion of the flow path portion of the body, Larger as you go to the back A tapered surface is formed, and the moving valve has a conical inclined surface having a diameter that decreases toward the insertion port side in the axial direction, and the inclined surface is the tapered surface. A valve body portion that abuts against the flow passage portion and closes the flow passage portion; a locking portion that is provided on the valve body portion and that is locked to the projection portion to prevent falling into the flow passage portion; An opening provided in a portion, and in a state where the lock member is not engaged with the groove portion, the inclined surface abuts on the tapered surface by the fluid pressure of the fluid flowing through the flow passage portion, and the flow passage It is characterized by closing the part .

  According to the first aspect of the present invention, when the nose is inserted into the concave insertion portion of the body, the lock member provided in the concave insertion portion engages the groove formed on the outer peripheral surface of the nose, And the body are connected. A movement valve is provided in the flow passage portion of the body, and when the lock member is engaged with the groove portion, the movement valve is pushed by the tip portion of the nose to open the flow passage portion. In this state, fluid can flow through the body and nose.

  At this time, if the insertion of the nose into the concave insertion portion is insufficient, the lock member may not be properly engaged with the groove portion, and the lock member may come off the groove portion. When the lock member is disengaged from the groove, the movement valve moves in a direction to close the flow path by the fluid pressure of the fluid flowing through the flow path. For this reason, it is suppressed that the fluid ejects from the flow path part of the body to the outside of the joint. Further, in this joint, the flow passage portion of the body can be closed when the lock member is removed from the groove portion without using a spring, and the cost can be reduced.

Further, a taper surface having a diameter increasing toward the back side of the body is formed on the protrusion formed on the wall portion of the flow passage portion of the body. The moving valve has a valve body portion having a conical inclined surface having a diameter that becomes smaller as the end portion on the insertion port side in the axial direction decreases toward the insertion port side. In a state where the locking member is not engaged with the groove portion, the inclined surface of the valve body portion and the tapered surface of the protrusion portion formed on the wall portion of the flow passage portion of the body are caused by the fluid pressure of the fluid flowing through the flow passage portion of the body. Abut and close the body channel . Further, when the moving valve is opened, the locking portion provided in the valve body portion is locked to the protrusion, and the moving valve is prevented from dropping into the flow path portion. In addition, an opening is provided in the locking portion, and fluid flows from the flow passage portion of the body to the nose through the opening. For this reason, the flow path part of the body can be closed with a simple configuration without using a spring, and the cost can be further reduced.

The invention according to claim 2 is characterized in that, in the joint according to claim 1 , the fluid is beer.

In the invention according to claim 2 , since the fluid is beer, if the pressure is high and the insertion of the nose into the concave insertion portion is insufficient, the lock member is easily detached from the groove portion. By closing, it is suppressed that the fluid ejects outside the joint.

  In the joint according to the present invention, even when the nose is not sufficiently inserted into the concave insertion portion of the body and the lock member is detached from the groove portion of the nose, fluid is ejected from the flow passage portion of the body to the outside of the joint. Can be suppressed.

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

  FIG. 1 is a half cut sectional view showing a separated state of the joint 10 according to the first embodiment of the present invention, and FIG. 2 is a half cut sectional view showing the coupled state of the joint 10.

  As shown in these drawings, the joint 10 includes a body 12 that is a female metal fitting and a nose 40 that is a male metal fitting. This joint 10 is used for the purpose of flowing a liquid L such as beer at a predetermined pressure (for example, about 0.4 MPa).

  The body 12 includes a body main body 16 in which a circular concave insertion portion 14 into which a nose 40 is inserted is formed, and an adapter 18 connected to the rear end side of the body main body 16. A female screw 16A is formed on the inner peripheral surface on the rear end side of the body main body 16, and an annular seal member 20 is inserted therein. Then, the male screw 18A formed on the adapter 18 is screwed into the female screw 16A of the body main body 16, and the body main body 16 and the adapter 18 are sealed with the seal member 20.

  An annular resin collet 22 is provided on the insertion opening 14A side of the nose 40 in the concave insertion portion 14 of the body main body 16. An annular holding member 24 is provided between the resin collet 22 and the body main body 16 to hold the resin collet 22 in the concave insertion portion 14 so as to be movable in the axial direction. A convex portion 24A is formed on the outer periphery of the holding member 24. The holding member 24 is press-fitted into the body main body 16, and the convex portion 24A is engaged with the concave portion of the body main body 16 to be fixed to the body main body 16. Yes.

  A resin cover 26 is externally inserted on the insertion opening 14A side of the body main body 16 so as to be movable in the axial direction. The end 26A of the resin cover 26 is bent and is in contact with the tip of the resin collet 22, and the resin collet 22 moves to the back side by pushing the resin cover 26 in the back side (in the insertion direction of the nose 40). It has a configuration. On the peripheral surface of the body main body 16, a protrusion 27 is provided on the inner side of the resin cover 26 to restrict the position of the resin cover 26 in the axial direction. In addition, a protrusion 29 for preventing the resin cover 26 from coming off is provided on the inner surface of the resin cover 26 on the peripheral surface of the body main body 16 on the insertion port 14 side.

  The resin collet 22 is made of an annular body, and is cut into a length of about 2/3 by a plurality of cuts 23 formed in the axial direction of the annular body. On the inner peripheral surface of the resin collet 22, a convex portion 22 </ b> A that engages a groove portion 44 formed in the nose 40 is formed at an end portion that is cut into a plurality of portions. In addition, a protrusion 22 </ b> B enlarged in the radial direction is formed on the outer peripheral end of the resin collet 22. When the protrusion 22B moves to the insertion port 14A side, the resin collet 22 is configured not to come out of the body body 16 by striking a small diameter step portion 24B formed at the back end of the holding member 24. ing. The resin collet 22 can be expanded in diameter by elastic deformation at both sides of the cut 23.

  A channel portion 28 through which the liquid L flows is formed in the core portion of the body main body 16 on the back side of the concave insertion portion 14. In addition, a protrusion 17 that protrudes from the inner wall of the body main body 16 toward the inner diameter side is provided between the concave insertion portion 14 of the body main body 16 and the flow path portion 28. A movement valve 30 is supported on the protrusion 17 so as to be movable in the axial direction. Further, on the back side of the protrusion 17 of the body main body 16, a tapered surface 17 </ b> A having a diameter that increases toward the back side is formed.

  As shown in FIGS. 3 and 4, the moving valve 30 includes a valve body portion 32 disposed on the back side (opposite side of the insertion port 14 </ b> A) from the protrusion 17, and the valve body portion 32 standing on the insertion port 14 </ b> A side. The four pillar portions 34 provided and an annular portion 36 provided at the tip of these pillar portions 34 are configured. An opening 37 inside the annular portion 36 and an opening 38 between the four column portions 34 are spaces for flowing the liquid L, and these openings 37 and 38 are formed large so that the liquid L can easily flow. ing. As shown in FIG. 1, the annular portion 36 is disposed on the insertion port 14 </ b> A side from the projection portion 17, and the valve body portion 32 is disposed on the opposite side of the annular portion 36 with the projection portion 17 interposed therebetween.

  The valve body portion 32 is formed in a conical shape on both sides in the axial direction. The inclined surface 32A on the insertion port 14A side abuts on the tapered surface 17A formed on the projection portion 17 of the body main body 16, thereby opening 37. , 38 move to the insertion port 14A side from the protrusion 17 to close the flow path portion 28 of the body body 16.

  As shown in FIG. 5, a locking portion 36 </ b> A that is locked to a stepped portion 17 </ b> B formed on the insertion port 14 </ b> A side of the protrusion 17 of the body main body 16 is formed on the valve body 32 side of the annular portion 36. ing. Since the locking portion 36A is locked to the stepped portion 17B, the moving valve 30 is prevented from dropping into the flow path portion 28 of the body main body 16. The moving valve 30 is made of resin or metal.

  On the other hand, the nose 40 is formed so as to have a smaller diameter as it goes to the distal end portion 42. On the peripheral surface of the nose 40, a circumferential groove 44 is formed that can be engaged with the convex portion 22 </ b> A of the resin collet 22 when inserted into the concave insertion portion 14. A circumferential groove 46 is formed on the peripheral surface of the nose 40 on the tip side from the groove portion 44, and an O-ring 48 is fitted in the circumferential groove 46. A channel portion 50 through which the liquid L flows is formed at the core portion of the nose 40. Further, a tapered surface 42A that expands in the radial direction is formed on the end surface of the nose 40 in the insertion direction. By using the tapered surface 42A, the flow of the liquid L from the flow path portion 28 of the body 12 to the flow path portion 50 of the nose 40 becomes smoother.

  Next, the operation of the joint 10 of the present invention will be described.

  When joining the nose 40 of the joint 10 and the body 12 shown in FIG. 1, the user inserts the nose 40 into the concave insertion portion 14 of the body main body 16. Then, the peripheral surface of the nose 40 presses the convex portion 22A of the resin collet 22, and the convex portion 22A expands in the space behind the holding member 24 due to elastic deformation. Then, as shown in FIG. 2, the convex portion 22A engages with the groove portion 44 of the nose 40 by the elastic restoring force, and the nose 40 is locked.

  At that time, the distal end portion 42 of the nose 40 pushes the annular portion 36 of the moving valve 30 supported by the protruding portion 17 of the body main body 16, and the moving valve 30 moves to the back side. As a result, as shown in FIGS. 6 and 7, the opening 38 of the moving valve 30 moves to the back side of the protrusion 17, and the flow path 28 of the body 12 and the flow path 50 of the nose 40 are opened 38 and 37. Communicate via As a result, the liquid L (for example, beer) can flow from the flow path portion 28 of the body 12 to the flow path portion 50 of the nose 40 through the openings 38 and 37. At this time, the openings 38 are respectively provided between the plurality of column portions 34 and the openings 37 are provided in the annular portion 36, whereby the flow of the liquid L becomes smooth.

  When the liquid L flows through the joint 10, an internal pressure is applied to the joint 10, and the nose 40 receives a force in the direction of pulling out from the body 12, and the resin collet 22 moves slightly toward the insertion port 14 </ b> A side of the concave insertion portion 14. The taper surface of the protrusion 22 </ b> B of the 22 hits the step 24 </ b> B at the end of the holding member 24. As a result, the diameter of the resin collet 22 is reduced and the engagement between the convex portion 22A and the groove portion 44 is not released, and the gripping force of the nose 40 is increased.

  On the other hand, when the insertion of the nose 40 into the concave insertion portion 14 is insufficient, the convex portion 22 </ b> A of the resin collet 22 does not fit into the groove portion 44 of the nose 40. In this state, when the liquid L is allowed to flow through the joint 10, as shown in FIG. 8, the joint 10 is pressurized and the convex portion 22A is detached from the groove portion 44, and the nose 40 is pulled out to the insertion port 14A side of the concave insertion portion 14. Try to.

  At this time, the moving valve 30 moves in the direction in which the liquid L flows due to the internal pressure when the liquid L flows, and the inclined surface 32A of the valve body portion 32 comes into contact with the tapered surface 17A of the protruding portion 17. As a result, the openings 37 and 38 move to the insertion port 14 </ b> A side from the protrusion 17, and the flow path portion 28 of the body 12 is closed by the valve body portion 32. For this reason, it is suppressed that the liquid L ejects from the flow path part 28 of the body 12 vigorously.

  In such a joint 10, when the engagement between the convex portion 22A of the resin collet 22 of the body 12 and the groove portion 44 of the nose 40 is released (in an emergency), the moving valve 30 moves due to the internal pressure of the liquid L, and the flow path Since the part 28 is closed, the spring which moves the movement valve 30 is unnecessary. For this reason, the joint 10 can be manufactured at low cost.

  Note that a rubber seal member may be provided at a portion of the protrusion 17 of the valve body 32 of the moving valve 30 that contacts the tapered surface 17A.

  In the above embodiment, the shape of the moving valve 30 is not limited to the above configuration, but the liquid L is allowed to flow when the nose 40 and the body 12 are coupled, and the flow path of the body 12 when the nose 40 and the body 12 are detached. Other shapes may be used as long as the portion 28 is closed.

  Moreover, in the said embodiment, although beer was poured as the liquid L, it is not limited to this structure, A carbonated drink and another fluid are applicable.

It is a half-cut sectional view which shows the state which isolate | separated the nose and body of the coupling which concern on 1st Embodiment of this invention. It is a half-cut sectional view which shows the state which couple | bonded the nose and body of the coupling which concern on 1st Embodiment of this invention. It is a side view which shows the movement valve used for the coupling shown in FIG. It is a half-cut sectional view which shows the movement valve used for the coupling shown in FIG. It is sectional drawing which shows the state by which the latching | locking part of the movement valve was latched by the projection part of the body. It is sectional drawing of the coupling in the AA line shown in FIG. It is sectional drawing of the coupling in the BB line shown in FIG. It is a half cut sectional view which shows the state of a movement valve when the convex part of the resin collet arrange | positioned at the body remove | deviates from the groove part of a nose. It is a half-cut sectional view which shows the state which isolate | separated the nose and body of the conventional coupling. It is a half-cut sectional view which shows the state which couple | bonded the nose and body of the conventional coupling.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Joint 12 Body 14 Concave insertion part 16 Body main body 17 Protrusion part 17A Tapered surface 17B Step part 22 Resin collet (lock member)
22A Convex part 28 Channel part 30 Movement valve 32 Valve element part 34 Column part 36 Annular part 36A Locking part 37 Opening 38 Opening 40 Nose 42 Tip part 44 Groove part 50 Channel part L Liquid (fluid)

Claims (2)

A nose connected to one pipe and a body connected to the other pipe and having a concave insertion portion into which the nose is inserted,
A locking member that is provided in the concave insertion portion and engages a groove formed on an outer peripheral surface of the nose when the nose is inserted into the concave insertion portion;
When the lock member is engaged with the groove portion, the flow passage portion of the body is pushed by the tip of the nose to release the flow passage portion, and the lock member is detached from the groove portion. A moving valve that moves in a direction to close the flow path portion by the fluid pressure of the fluid flowing through the flow path portion;
And having a,
The protrusion formed on the wall portion of the flow passage portion of the body is formed with a tapered surface having a diameter that increases toward the back side of the body,
The moving valve is
A valve body portion having an end portion on the insertion port side in the axial direction that has a conical inclined surface that decreases in diameter toward the insertion port side, and the inclined surface abuts on the tapered surface to close the flow passage portion. ,
A locking portion that is provided on the valve body portion and is locked to the projection portion to prevent falling into the flow path portion;
An opening provided in the locking portion;
Have
In a state in which the lock member is not engaged with the groove, the inclined surface abuts on the tapered surface by the fluid pressure of the fluid flowing through the flow path, and closes the flow path . The joint according to claim 1 , wherein the fluid is beer.

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