JP5036428B2 - Fitting - Google Patents

Description

  The present invention relates to a joint including a male nose in which a flow path is formed and a female body.

  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 having a flow path portion and a female body is known.

  FIG. 15 shows a half-cut sectional view of a conventionally known joint composed of a nose and a body. In FIG. 15, for the sake of clarity, the half-cut section of the nose and the body is shown upside down. 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. 15, 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 deep groove 106 is formed on the inner peripheral wall of the concave insertion portion 104, and a shallow groove 108 formed shallower than the deep groove 106 is formed on the tip side adjacent to the deep groove 106. In a state where no internal pressure acts on the body 102 and the nose 120, a metal retaining ring 110 is disposed in the deep groove 106 (see FIG. 16). The retaining 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 retaining 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 retaining ring 110 is fitted is formed on the circumferential surface. In addition, O-rings 130 and 132 are disposed in circumferential grooves formed on the front end side and the rear side from the circumferential groove 124. A channel portion 134 is formed in the core portion of the nose 120.

  When the nose 120 is inserted into the concave insertion portion 104 of the body 102, the retaining ring 110 is fitted into the circumferential groove 124 of the nose 120. In this state, when a pressure is applied to the joint 100 by flowing a liquid such as beer through the flow path part 112 of the body 102 and the flow path part 134 of the nose 120, the direction in which the nose 120 comes out as shown in FIG. When the retaining ring 110 moves slightly in the pulling direction) and moves to the shallow groove 108, the nose 120 is locked so as not to come out of the concave insertion portion 104 (see, for example, Patent Document 1).

As shown in FIG. 16, when removing the nose 120 from the body 102, the retaining ring 110 is expanded in diameter and moved to the deep groove 106 by moving the cover 114 toward the center in the axial direction. As a result, the engagement between the circumferential groove 124 of the nose 120 and the retaining ring 110 is released, and the nose 120 can be extracted from the concave insertion portion 104 of the body 102.
JP 2005-147289 A

  However, in the joint 100 shown in FIG. 15, when the nose 120 and the body 102 are repeatedly attached and detached and cleaned, the nose 120 and the shallow groove 108 of the body 102 are worn and deformed, and the nose 120 is not deformed when pressure is applied. There is a possibility that the nose 120 comes out of the body 102 without locking. Further, when the nose 120 is inserted into the concave insertion portion 104 of the body 102 obliquely, the nose 120 is caught in the body 102 in an oblique state and pressure is applied to the joint 100 even though the nose 120 is not completely locked. There is a possibility of fluid leakage and nose 120 disconnection.

  The present invention has been made in view of the above problems, and provides a joint capable of suppressing the nose from being pulled out due to wear or deformation of the nose or the body or being caught on the body due to the oblique insertion of the nose. Objective.

  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 joint formed with a flow path through which fluid flows in the nose and the body, provided in the concave insertion portion, and having a plurality of cuts in the axial direction of the cylindrical body, A resin-made locking member formed with a convex part that engages with a circumferential groove formed on the outer peripheral surface of the nose, and can be rotated in the circumferential direction between the locking position and the unlocking position on the outer peripheral side of the body body And is moved to the axial pipe connection portion side of the body body at the unlocking position, and the lock member is pushed into the back side of the concave insertion portion to engage the convex portion and the circumferential groove. A release member for releasing the body and the body body A projection formed on a peripheral surface, a recess provided on the release member, engaged with the projection at the unlocking position, and allowing the release member to move toward the pipe connection portion in the axial direction; A restricting portion that is provided between the outer peripheral surface of the body main body and the inner peripheral surface of the release member and restricts the rotation of the release member when the release member is rotated from the lock position to the lock release position. It is characterized by having.

  According to the first aspect of the present invention, when connecting the nose and the body, the nose is inserted into the concave insertion portion of the body. The concave insertion portion is provided with a resin lock member having a convex portion formed at the end of the cylindrical body. When the nose is inserted into the concave insertion portion of the body, the convex portion of the lock member is provided. Engages the peripheral groove of the nose. At this time, by rotating the release member to the lock position, the release member interferes with the protrusion of the body body and does not move in the axial direction, and the release member pushes the lock member into the back of the concave insertion portion. Is prevented. At this time, since a restricting portion for restricting the rotation of the release member is provided between the outer peripheral surface of the body main body and the inner peripheral surface of the release member, the release member is inadvertently locked when the joint is used. From being turned to the unlocked position.

  Further, when the nose is detached from the concave insertion portion of the body, a force that gets over the restricting portion is applied to the release member, and the release member is rotated to the unlock position. At the unlock position, the release member is moved toward the pipe connection portion in the axial direction of the body main body by engaging the recess of the release member and the protrusion of the body main body. Thereby, the release member pushes the lock member into the back side of the concave insertion portion, and the engagement between the lock member and the circumferential groove is released. In this state, the nose can be pulled out from the concave insertion portion of the body.

  In this joint, a lock member in which a plurality of cuts are formed in a cylindrical body is disposed in the concave insertion portion of the body, and a convex portion formed at the distal end portion of the lock member is formed on the outer peripheral surface of the nose. Since it is engaged with the groove, the lock member is less likely to be worn and deformed than the conventional retaining ring even when the nose and the body are repeatedly attached and detached, and the nose can be prevented from coming off from the body. In addition, by providing a lock member made of a cylindrical body, it is possible to prevent the nose from being caught by the concave insertion portion of the body when the nose is inserted obliquely.

  According to a second aspect of the present invention, in the joint according to the first aspect, the restricting portion includes a first convex portion projecting in a radial direction from the outer peripheral surface of the body body, and an inner peripheral surface of the release member. And a second convex portion projecting inward.

  The invention according to claim 2 includes a first convex portion projecting radially from the outer peripheral surface of the body body, and a second convex portion projecting inward from the inner peripheral surface of the release member. When the member is rotated from the lock position to the lock release position, it is necessary to apply a force such that the second protrusion of the release member gets over the second protrusion of the body body. For this reason, even if a normal external force is applied when the joint is used, the rotation of the release member is restricted, and the release member is prevented from being inadvertently rotated from the lock position to the lock release position.

  According to a third aspect of the present invention, in the joint according to the second aspect, at least one of the first convex portion and the second convex portion rotates the release member from the lock position to the lock release position. The angle of the inclined surface in the circumferential direction is adjusted so that the resistance is large when the release member is rotated, and the resistance is decreased when the release member is rotated from the unlock position to the lock position.

  In at least one of the first convex portion and the second convex portion, the angle of the inclined surface in the circumferential direction is adjusted, and the release member is rotated from the lock position to the lock release position. The resistance is large when the release member is rotated, and the resistance is small when the release member is rotated from the unlock position to the lock position. Therefore, when rotating the release member from the lock position to the lock release position, it is necessary to apply a force that overcomes the resistance to rotate the release member, and the release member is inadvertently moved from the lock position to the lock release position. The rotation is further prevented. Further, when the release member is rotated from the unlock position to the lock position, since the resistance is small, the release member can be rotated with a small force.

  According to a fourth aspect of the present invention, in the joint according to any one of the first to third aspects, the body body, the lock member, and the release member are formed of resin. It is characterized by.

  In the invention described in claim 4, since the resin lock member is provided and the body main body and the release member are formed of resin, the cost of the joint can be reduced. In addition, the body main body and the release member can be elastically deformed, and the regulation portion can be easily adjusted.

  According to a fifth aspect of the present invention, in the joint according to any one of the first to fourth aspects, the fluid is beer.

  In the fifth aspect of the present invention, when beer is flown as a fluid, the lock member and the nose are hardly worn and deformed even when the nose and the body are repeatedly attached and detached, and the nose can be prevented from coming off. In addition, by providing a lock member made of a cylindrical body, it is possible to prevent the nose from being caught on the body when the nose is inserted obliquely.

  The joint according to the present invention is less likely to wear and deform the lock member and the nose than the conventional retaining ring even when the nose and the body are repeatedly attached and detached and washed, and can prevent the nose from coming off the body. . In addition, by providing a lock member made of a cylindrical body, it is possible to prevent the nose from being caught by the concave insertion portion of the body when the nose is inserted obliquely.

  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 female body 12 and a male nose 40. The joint 10 is used in an application in which a liquid such as beer is allowed to flow at a predetermined pressure (for example, about 0.4 MPa).

  The body 12 includes a body main body 16 in which a cylindrical concave insertion portion 14 into which a nose 40 is inserted is formed. A channel portion 20 is formed in the core portion of the body body 16 so as to communicate with the concave insertion portion 14 and through which a liquid flows. A threaded portion 16A is formed on the inner peripheral surface on the rear end side of the body main body 16, and a threaded portion of an adapter (not shown) connected to the rear end side of the body main body 16 is screwed into the threaded portion 16A. It has come to be.

  The body main body 16 is formed with a large inner diameter of the distal end portion 16B on the insertion opening 14A side of the concave insertion portion 14 into which the nose 40 is inserted, and a cylindrical collet 22 as a lock member is provided inside the distal end portion 16B. Is interpolated. Between the collet 22 and the distal end portion 16B of the body main body 16, a cylindrical holding member 24 that holds the collet 22 in the concave insertion portion 14 so as to be movable in the axial direction is provided. A convex portion 24A is formed on the outer periphery of the holding member 24. The holding member 24 is press-fitted into the distal end portion 16B of the body main body 16, and the convex portion 24A is engaged with a concave portion inside the distal end portion 16B. The member 24 is fixed to the distal end portion 16B.

  As shown in FIG. 6, the collet 22 is formed of a resin-made cylindrical body, and includes a plurality of cuts 23 formed along the axial direction on the side opposite to the end portion 22A on the insertion port 14A side of the cylindrical body. A length of about 2/3 is cut. On the inner peripheral surface of the collet 22, a convex portion 22 </ b> C that engages a circumferential groove 44 formed in the nose 40 is formed on the end portion 22 </ b> B side that is cut into a plurality. In the present embodiment, six cuts 23 are formed, and six convex portions 22C are formed. The collet 22 is formed with a plurality of cuts 23 so that the plurality of convex portions 22C can be expanded in diameter by elastic deformation. As shown in FIG. 2, the plurality of convex portions 22 </ b> C are engaged with a circumferential groove 44 formed on the outer peripheral surface of the nose 40 when the nose 40 is inserted into the concave insertion portion 14. . Further, the end 22B of the collet 22 disposed on the side opposite to the insertion port 14A protrudes radially outward.

  Further, on the outer peripheral side of the collet 22, a protrusion 22D protruding in the radial direction is formed in the vicinity of the intermediate portion in the axial direction. As shown in FIG. 3, a protrusion 24B protruding inward is formed on the distal end side (insertion opening 14A side) of the holding member 24, and the protrusion 22D of the collet 22 moves to the insertion opening 14A side. By colliding with the protrusion 24B of the holding member 24, the collet 22 is prevented from coming off.

  A resin cover 26 as a release member is externally attached to the outer peripheral side of the distal end portion 16B of the body main body 16 so as to be movable in the axial direction. The cover 26 is made of a cylindrical member, and is formed so that the end portion 26A on the side of the insertion port 14A is bent in a substantially right angle direction so as to be in contact with the end portion 22A of the collet 22. At a position adjacent to the cover 26 on the rear side of the body main body 16 (opposite to the front end portion 16B), a substantially cylindrical protrusion 30 protruding from the outer peripheral surface of the body main body 16 is provided. Two protrusions 30 are provided in the direction of about 180 ° of the body main body 16. At the rear edge of the cover 26, two concave cutouts 27 for moving each projection 30 are formed with a length of about ¼ of the circumferential length in the circumferential direction. The cover 26 is rotatable in the circumferential direction until the one end 27 </ b> A and the other end 27 </ b> B of the notch 27 abut against the protrusion 30. At this time, the lock position A (see FIG. 2) that locks the movement of the cover 26 in the axial direction of the pipe connection portion (screw portion 16A side) at the position where the one end portion 27A of the cutout portion 27 abuts against the projection portion 30. The unlocking position B (see FIG. 1) allows the movement of the cover 26 to the pipe connecting part side (screw part 16A side) in the axial direction at the position where the other end part 27B of the notch part 27 abuts against the protruding part 30. ). In other words, the cover 26 is configured to be rotatable between the lock position A and the lock release position B in the circumferential direction.

  As shown in FIG. 1, the other end 27B of the cutout 27 of the cover 26 is formed with a recess 27C that is recessed in the direction of the tip 16B of the body body 16, and the recess 27C is formed in the body body 16 as shown in FIG. The protrusion 30 can be engaged. As a result, at the lock release position B, the cover 26 can be moved to the pipe connecting portion side (the screw portion 16A side) in the axial direction by engaging the concave portion 27C of the cover 26 with the protruding portion 30 of the body main body 16. it can.

  As shown in FIG. 1, the end portion 26A of the cover 26 is formed so as to be able to contact the end portion 22A of the collet 22 on the insertion port 14A side, and the cover 26 is disposed on the rear side of the body body 16 (insertion of the nose 40). The collet 22 is pushed and moved to the back side of the concave insertion portion 14 by pushing in the direction). At that time, the end 22B on the back side of the collet 22 enters the groove 25 formed on the back side of the holding member 24 on the inner peripheral side of the body main body 16. Further, a protrusion 26B is formed on the inner peripheral surface of the cover 26, and a protrusion 18 that prevents the cover 26 from coming out by abutting against the protrusion 26B of the cover 26 on the outer peripheral surface of the front end portion 16B of the body body 16. Is provided.

  7A shows a state where the cover 26 is rotated to the lock position A, and FIG. 7B shows a state where the cover 26 is slightly rotated from the lock position A in the unlocking direction. It is shown. As shown in these drawings, on the outer peripheral surface of the cover 26, a protrusion 26C protruding in the radial direction is provided at a position adjacent to the one end 27A of the notch 27. In addition, the outer peripheral surface of the body main body 16 that faces the inner peripheral surface of the cover 26 is located near the protrusion 30 and has a diameter in the direction of the other end 27B of the notch 27 with respect to the protrusion 30. A first protrusion 32 protruding in the direction is provided. On the inner peripheral surface of the cover 26, a second convex portion 28 that protrudes inward of the cover 26 is provided at a position close to the one end portion 27A of the cutout portion 27 and adjacent to the cutout portion 27. It has been. The first convex portion 32 of the body body 16 and the second convex portion 28 of the cover 26 are formed at positions where they abut each other when the cover 26 is rotated in the circumferential direction. 7A, the first convex portion 32 of the body main body 16 and the second convex portion 28 of the cover 26 are disposed so as to face each other, and the second convex portion of the cover 26 is disposed. The first convex portion 32 of the body body 16 is located closer to the one end portion 27 </ b> A of the cutout portion 27 than the portion 28. Then, as shown in FIG. 7B, when the cover 26 is rotated to the unlock position B, the second convex portion 28 of the cover 26 needs to ride over the first convex portion 32 of the body main body 16. Yes, the rotation of the cover 26 is restricted.

  The first convex portion 32 has an inclined surface 32A on the protruding portion 30 side formed with a gentle gradient, and an inclined surface 32B opposite to the protruding portion 30 formed with a steep gradient. Further, the second convex portion 28 is formed of a convex curved surface, the inclined surface 28A on the one end portion 27A side of the notch portion 27 is formed with a steep slope, and the opposite side of the one end portion 27A of the notch portion 27 is formed. The inclined surface 28A is formed with a gentle gradient. Accordingly, when the cover 26 is rotated from the lock position A to the lock release position B, the steep inclined surface 32B of the first convex portion 32 and the steep inclined surface 28A of the second convex portion 28 contact each other. Therefore, the resistance increases. Further, when the cover 26 is rotated from the unlock position B to the lock position A, the gently inclined surface 32A of the first projecting portion 32 and the gently inclined surface 28B of the second projecting portion 28 come into contact with each other. Becomes smaller.

  On the other hand, as shown in FIGS. 1 and 2, the nose 40 is formed so as to have a smaller diameter as it goes to the distal end portion 42. As described above, a trapezoidal circumferential groove 44 that can be engaged with the convex portion 22C of the collet 22 when formed in the concave insertion portion 14 of the body 12 is formed on the peripheral surface of the nose 40. A concave circumferential groove 46 is formed on the circumferential surface of the nose 40 on the tip side from the circumferential groove 44, and an O-ring 48 is fitted into the circumferential groove 46. A channel portion 50 through which a liquid flows is formed in the core portion of the nose 40. In addition, a connection portion 52 to which a hose (not shown) is connected is provided at the end portion of the nose 40 opposite to the distal end portion 42.

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

  As shown in FIG. 2, in a state where the nose 40 is inserted into the concave insertion portion 14 of the body 12, the convex portion 22 </ b> C of the collet 22 is engaged with the circumferential groove 44 of the nose 40. At that time, the nose 40 is locked to the concave insertion portion 14 by rotating the cover 26 to the lock position A. At the lock position A, one end 27A of the notch 27 of the cover 26 is in contact with the protrusion 30 of the body body 16, the cover 26 interferes with the protrusion 30, and the cover 26 is connected to the axial pipe connection portion. It cannot move to the (screw part 16A side). For this reason, the nose 40 cannot be pulled out from the concave insertion portion 14 without the collet 22 being pushed into the back side of the concave insertion portion 14.

  In this state, when a fluid flows through the joint 10, as shown in FIG. 3, pressure is applied to the joint 10 (internal pressure is applied), and the force slightly moves toward the insertion port 14 </ b> A in response to the force in the direction in which the nose 40 comes off. The protrusion 22D of the collet 22 abuts against the protrusion 24B of the holding member 24. Thereby, the engagement between the convex portion 22C of the collet 22 and the peripheral groove 44 of the nose 40 is not released, and the gripping force of the nose 40 is increased.

  As shown in FIG. 4A, the letters “LOCK” and “REMOVE” are formed on the front end surface of the cover 26 (the surface on the insertion port 14A side). ”Is rotated to the position of the protrusion 30. As shown in FIGS. 4 and 5, at the lock position A, the protrusion 30 of the body main body 16 is in contact with one end 27 </ b> A of the notch 27 of the cover 26, and the first protrusion 32 of the body main body 16. However, it is located on the side closer to the one end portion 27 </ b> A of the notch portion 27 than the second convex portion 28 of the cover 26. In this state, even if the cover 26 tries to rotate in the direction of the unlock position B, the second convex portion 28 of the cover 26 hits the first convex portion 32 of the body main body 16 and the rotation of the cover 26 is restricted. The That is, when the cover 26 is rotated to the unlocking position B, the second convex portion 28 of the cover 26 needs to ride on the first convex portion 32 of the body main body 16, and the second convex portion The cover 26 cannot be rotated unless the force 28 overcomes the first protrusion 32 is applied. In particular, as shown in FIG. 7, when the cover 26 is rotated from the lock position A to the lock release position B, the steep inclined surface 32 </ b> B of the first convex portion 32 and the steep slope of the second convex portion 28. Therefore, the cover 26 is difficult to rotate. For this reason, it is possible to suppress or prevent the cover 26 from being inadvertently rotated to the unlock position B when the joint 10 is used.

  On the other hand, when the nose 40 is detached from the body 12, the cover 26 is rotated from the lock position A to the lock release position B. As shown in FIG. 4A, at the lock position A, the “lock” position of the cover 26 is at the position of the protrusion 30, and as shown in FIG. The cover 26 is rotated until the position of the protrusion 30 is reached. At this time, as shown in FIG. 7, the cover 26 made of resin is elastically deformed and gets over the first convex portion 32 by rotating the cover 26 with a certain force or more. Then, as shown in FIG. 8, the cover 26 is rotated to the unlocking position B where the other end 27 </ b> B of the notch 27 abuts the protrusion 30, so that the recess 27 </ b> C of the cover 26 and the protrusion 30 face each other. To do.

  Then, as shown in FIGS. 9 to 11, by engaging the concave portion 27 </ b> C of the cover 26 and the protrusion 30, the cover 26 is connected to the pipe connecting portion side in the axial direction of the body body 16 (in the insertion direction of the nose 40). Push into. Thereby, the end portion 26 </ b> A on the insertion port 14 </ b> A side of the cover 26 comes into contact with the end portion 22 </ b> A of the collet 22. As shown in FIG. 12, when the cover 26 is further pushed into the axial pipe connection portion side (the insertion direction of the nose 40) of the body main body 16, the end 22 B on the back side of the collet 22 is elastically deformed to hold the holding member 24. Into the groove portion 25 on the back side, and the engagement between the convex portion 22C of the collet 22 and the peripheral groove 44 of the nose 40 is released. In this state, as shown in FIGS. 13 and 14, the nose 40 can be pulled out from the concave insertion portion 14, and the nose 40 and the body 12 can be separated (see FIG. 1).

  Further, when connecting the nose 40 and the body 12, the nose 40 is inserted into the concave insertion portion 14 of the body main body 16. Then, the peripheral surface of the nose 40 pushes the convex portion 22 </ b> C of the collet 22, and the end 22 </ b> B of the collet 22 is expanded in diameter by elastic deformation in the groove portion 25 on the back side of the holding member 24. As shown in FIG. 11, the convex portion 22C engages with the circumferential groove 44 of the nose 40 by an elastic restoring force. At that time, the collet 22 is locked by rotating the cover 26 to the lock position A. When the cover 26 is rotated from the unlock position B to the lock position A, since the gentle inclined surface 32A of the first convex portion 32 and the gentle inclined surface 28B of the second convex portion 28 contact each other, the resistance is small. The cover 26 is easy to rotate. The joint 10 can insert the nose 40 into the concave insertion portion 14 of the body main body 16 regardless of whether the cover 26 is in the lock position A or the lock release position B.

  In such a joint 10, when the cover 26 is in the lock position A, the rotation of the cover 26 is restricted by the first protrusion 32 and the second protrusion 28 coming into contact with each other. Sometimes, the cover 26 can be prevented from being inadvertently rotated to the unlock position B and the collet 22 being pushed inward in the axial direction. For this reason, when beer is poured into the joint 10, it is possible to suppress or prevent the nose 40 from coming off from the body 12.

  Further, since the convex portion 22C of the resin collet 22 made of a cylindrical body is engaged with the circumferential groove 44 of the nose 40, even if the nose 40 and the body 12 are repeatedly attached and detached and washed, Compared to the case where the retaining ring 110 (see FIG. 15) is used, the collet 22 and the nose 40 are less likely to be worn and deformed, and the nose 40 can be prevented from coming off from the body 12. Further, the collet 22 is formed of a cylindrical body, and when the nose 40 is obliquely inserted, the collet 22 can be suppressed from being caught on the concave insertion portion 14 of the body 12.

  Furthermore, since the collet 22 is made of resin, the collet 22 can be elastically deformed to engage the convex portion 22C with the circumferential groove 44 of the nose 40, and the engagement portion can be easily adjusted. Further, since the cover 26 and the body main body 16 are made of resin, the cover 26 is easily elastically deformed, and the first convex portion 32 of the body main body 16 and the second convex portion 28 of the cover 26 are easily adjusted. . Furthermore, the cost of the joint 10 can be reduced.

  In the above embodiment, the first convex portion 32 of the body body 16 and the second convex portion 28 of the cover 26 are provided in order to restrict the rotation of the cover 26 from the locked position to the unlocked position. However, it is not limited to this, and other shapes may be used.

  In the above-described embodiment, beer is flowed as a liquid. However, the present invention is not limited to this, and carbonated drinks and other fluids are also applicable.

It is a half-cut sectional view which shows the state which rotated the cover of the coupling which concerns on 1st Embodiment of this invention to the lock release position, and isolate | separated the nose and the body. FIG. 3 is a half cut sectional view showing a state in which the nose and body of the joint according to the first embodiment of the present invention are coupled and the cover is rotated to the lock position. FIG. 3 is a half sectional view showing a state in which pressure is applied to the joint shown in FIG. 2. (A) is a plan view of the joint shown in FIG. 3, (B) is a side view with a part of the joint cut in half, and (C) is a cross section showing the first and second protrusions of the joint. FIG. It is the side view seen from the direction of 45 degrees with respect to the joint shown in FIG. 4 (B). It is a top view of a single collet, and a half cut sectional view. (A) is an enlarged cross-sectional view showing the vicinity of the first and second protrusions when the cover is in the locked position, and (B) is the first view when the cover is slightly rotated in the direction of the unlocked position. It is an expanded sectional view showing the 1 convex part and the 2nd convex part neighborhood. It is a half-cut sectional view which shows the state which rotated the cover of the coupling to the lock release position. (A) is a plan view of the joint shown in FIG. 9, (B) is a side view in which a part of the joint is cut in half, and (C) is a cross section showing the first and second protrusions of the joint. FIG. It is the side view seen from the direction of 45 degrees with respect to the joint shown in FIG.9 (B). It is a half-cut sectional view which shows the state which engaged the recessed part of the cover, and the projection part of the body main body in the lock release position. FIG. 5 is a half cut sectional view showing a state in which the cover is pushed into the pipe connecting portion side in the axial direction of the body body and the engagement between the convex portion of the collet and the peripheral groove of the nose is released. It is a half-cut sectional view showing the process of pulling out the nose from the body. It is a half-cut sectional view showing the process of pulling out the nose from the body. It is a half-cut sectional view which shows the state which couple | bonded the nose and body of the conventional coupling, and the pressure acted. It is a half cut sectional view which shows the state of the retaining ring in the operation | movement which isolate | separated the nose and body of the conventional coupling.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Joint 12 Body 14 Recessed insertion part 14A Insertion port 16 Body main body 20 Flow path part 22 Collet (Lock member)
22B End 22C Convex 24 Holding Member (Body Body)
25 Groove (back side of concave insertion part)
26 Cover (release member)
27 Notch 27C Concave 28 Second Convex (Regulator)
28A Inclined surface 28B Inclined surface 30 Protruding portion 32 First convex portion (regulating portion)
32A Inclined surface 32B Inclined surface 40 Nose 44 Circumferential groove 50 Channel portion A Lock position B Unlock position

Claims (5)

A nose connected to one pipe and a body having a concave insertion part connected to the other pipe and into which the nose is inserted, and a flow path portion through which fluid flows is formed in the nose and the body. A joint,
A resin lock provided in the concave insertion portion, provided with a plurality of cuts in the axial direction of the cylindrical body, and having a convex portion that engages with a circumferential groove formed in the outer peripheral surface of the nose at the end. A member,
It is provided on the outer peripheral side of the body main body so as to be rotatable between a lock position and an unlock position in the circumferential direction, and moves to the pipe connection portion side in the axial direction of the body main body at the lock release position. A release member that pushes into the back side of the concave insertion portion to release the engagement between the convex portion and the circumferential groove;
A protrusion formed on the outer peripheral surface of the body body;
A recess provided on the release member, engaged with the protrusion at the unlock position, and capable of moving the release member toward the pipe connection portion in the axial direction;
A restriction that is provided between the outer peripheral surface of the body main body and the inner peripheral surface of the release member and restricts rotation of the release member when the release member is rotated from the lock position to the lock release position. And
A joint characterized by comprising:   The restricting portion includes a first convex portion protruding in a radial direction from an outer peripheral surface of the body main body, and a second convex portion protruding inward from an inner peripheral surface of the release member. The joint according to claim 1.   At least one of the first protrusion and the second protrusion has a large resistance when the release member is rotated from the lock position to the lock release position, and the release member is moved from the lock release position to the lock release position. The joint according to claim 2, wherein the angle of the inclined surface in the circumferential direction is adjusted so that the resistance becomes small when rotating to the lock position.   The joint according to any one of claims 1 to 3, wherein the body main body and the release member are formed of resin.   The joint according to any one of claims 1 to 4, wherein the fluid is beer.

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