WO2010131609A1 - 管継手 - Google Patents
管継手 Download PDFInfo
- Publication number
- WO2010131609A1 WO2010131609A1 PCT/JP2010/057832 JP2010057832W WO2010131609A1 WO 2010131609 A1 WO2010131609 A1 WO 2010131609A1 JP 2010057832 W JP2010057832 W JP 2010057832W WO 2010131609 A1 WO2010131609 A1 WO 2010131609A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- push nut
- stop ring
- joint
- locking groove
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
- F16L37/1235—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members the connection taking place from inside the pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/0036—Joints for corrugated pipes
- F16L25/0045—Joints for corrugated pipes of the quick-acting type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
- F16L19/065—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring
- F16L19/0653—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring the ring being rotatably connected to one of the connecting parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/02—Hose-clips
- F16L33/08—Hose-clips in which a worm coacts with a part of the hose-encircling member that is toothed like a worm-wheel
- F16L33/085—Hose-clips in which a worm coacts with a part of the hose-encircling member that is toothed like a worm-wheel with a scroll-type screw
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/28—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses for hoses with one end terminating in a radial flange or collar
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/088—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a split elastic ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/28—Couplings of the quick-acting type with fluid cut-off means
- F16L37/38—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in only one of the two pipe-end fittings
- F16L37/40—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in only one of the two pipe-end fittings with a lift valve being opened automatically when the coupling is applied
- F16L37/413—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in only one of the two pipe-end fittings with a lift valve being opened automatically when the coupling is applied the lift valve being of the sleeve type, i.e. a sleeve being telescoped over an inner cylindrical wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L2201/00—Special arrangements for pipe couplings
- F16L2201/10—Indicators for correct coupling
Definitions
- the present invention relates to a pipe joint for connecting a flexible pipe used for, for example, a gas pipe.
- Japanese Patent Application Laid-Open No. 2003-56776 discloses a joint for flexible pipes that includes means (disc spring) that exhibits a click action by cooperating with the corrugated pipe when the corrugated pipe of the flexible pipe is inserted to a predetermined position.
- the click action is a temporary effect that only the operator can feel, and the construction manager cannot determine whether normal construction has been performed from the appearance of the pipe joint after construction.
- Patent No. 3538090 includes a joint main body having a cylindrical guide portion and a hole, a transparent or translucent protective cover attached to the hole, a nut screwed into the joint main body, and a ring.
- a pipe made of resin or the like is externally fitted to the cylindrical guide part, a ring is interposed between the nut and the guide part, and the ring presses the outer surface of the pipe by screwing of the nut, and is externally fitted to the guide part.
- a pipe joint is disclosed in which the tip of the pipe can be seen from the hole. However, with this pipe joint, it is impossible to confirm whether or not the operator or the construction manager is normally connected at the narrow and dark construction site.
- Japanese Patent Laid-Open No. 2004-28112 discloses a seal packing that is in close contact with a flexible pipe in a joint body, a lock ring that can be slidably fitted to and detached from one end of the seal packing, and an identification pin that engages with the lock ring.
- a pipe joint having a slide ring. When the taper surface of the lock ring comes into contact with the taper surface of the joint body, the diameter of the lock ring is reduced, and the identification pin of the slide ring released from the lock ring protrudes from the joint body.
- a pipe joint is disclosed. This pipe joint is expensive because it is necessary to provide an identification pin introduction hole for confirming the connection of the flexible pipe in the joint body in the axial direction. Further, since the packing is pressed by the flexible tube and stretched in the axial direction, the sealing pressure may be reduced.
- JP 2009-8219 discloses a pipe joint in which a movable piece, a seal member, a packing having a thick part and a thin part, and a compression ring that presses the thin part of the packing to reduce the diameter are arranged in the joint body. is doing.
- the movable piece is detached, so that a sound or a reaction can be felt.
- this pipe joint can maintain good sealing properties, the construction manager cannot confirm whether or not normal construction has been performed from the appearance of the pipe joint after construction.
- an object of the present invention is to provide a pipe joint that can maintain the sealing performance for a long period of time and can surely confirm whether or not normal construction has been performed from the appearance of the pipe joint after construction. is there.
- a first pipe joint of the present invention includes a push nut into which a pipe is inserted, a joint body into which the push nut is partially inserted, a seal member for sealing the pipe and the joint body, and the pipe.
- a retainer for engaging and preventing the pipe from coming off; and a locking mechanism for holding the push nut in a predetermined position with respect to the joint body,
- the locking mechanism includes a stop ring, an annular groove formed on an outer surface of the push nut so as to receive the stop ring, and an inner surface of the joint body so as to receive the stop ring and communicate with each other.
- Consisting of a plurality of locking grooves formed in The stop ring is engaged across the annular groove and the first locking groove until the connection of the pipe is completed, When a pulling force is applied to the tube after the tube has been connected, the stop ring moves from the first locking groove to the second locking groove on the inlet side. The push nut is pulled out from the joint body to such an extent that the connection can be confirmed.
- the first pipe joint includes elastic means that is unlocked and extended when pushed at the tip of the pipe, and the seal member pushed in the inlet direction by the extension of the elastic means includes the pipe and the joint body. Is preferably sealed.
- each of the first and second locking grooves has a tapered groove portion, and both the tapered groove portions are adjacent to each other to form an annular projecting portion whose both side surfaces are inclined. It is preferable that the annular protrusion can be moved in both directions between the first locking groove and the second locking groove.
- the angle of inclination of the side surface of the annular protrusion is such that the stop ring does not exceed the annular protrusion due to the action of the elastic means, but the stop ring is not connected to the annular protrusion by a force that pulls the flexible tube for connection confirmation. Is preferably set so as to exceed.
- an indicator is provided on the push nut, and the indicator is concealed in the joint main body until the pipe is connected.
- the push nut is moved to the joint.
- the indicator is exposed from the joint main body while being pulled out from the main body, so that the normal connection of the pipe can be confirmed.
- the indicator is preferably a ring that is detachably attached to the push nut.
- the indicator ring is preferably colored so that it can be visually recognized.
- the stop ring is a third locking groove on the back side of the first locking groove. It is preferable that the engagement with the annular groove is released and the push nut can be removed from the joint body.
- the first pipe joint is suitable for connecting flexible pipes.
- a preferable example of the first pipe joint is a push nut into which a flexible pipe is inserted, a joint main body into which the push nut is partially inserted, and the lock is released when it is pushed at the tip of the flexible pipe to extend.
- An elastic means a seal member that is pushed in the inlet direction by extension of the elastic means to seal the flexible pipe and the joint body, and is pushed by the seal member and contacts the push nut to the flexible pipe.
- the locking mechanism includes a stop ring, an annular groove formed on an outer surface of the push nut so as to receive the stop ring, and an inner surface of the joint body so as to receive the stop ring and communicate with each other. Consisting of a plurality of locking grooves formed in The stop ring is engaged across the annular groove and the first locking groove until the connection of the flexible pipe is completed, When the flexible tube is pulled after the connection is completed, the stop ring moves from the first locking groove to the second locking groove on the inlet side so that the normal connection of the flexible tube can be confirmed. The push nut is pulled out from the joint body.
- the first pipe joint include a push nut into which a flexible pipe is inserted, a joint body into which the push nut is partially inserted, and the lock is released when the tip of the flexible pipe is released to extend.
- An elastic means for sealing a seal member for sealing the flexible pipe and the joint body by being pushed toward the inlet by extension of the elastic means, and the flexible pipe by being pressed by the seal member and abutting the push nut
- a retainer that engages with the joint body, a locking mechanism that holds the push nut in a predetermined position with respect to the joint body, and an indicator ring provided on the push nut to confirm normal connection of the flexible pipe;
- the locking mechanism includes a stop ring, an annular groove formed on an outer surface of the push nut so as to receive the stop ring, and an inner surface of the joint body so as to receive the stop ring and communicate with each other.
- a second locking groove, a first locking groove and a third locking groove formed in order from the entrance side Each of the first and second locking grooves has a tapered groove, and both tapered grooves are adjacent to each other to form an annular protrusion having both side surfaces inclined,
- the stop ring is engaged across the annular groove and the first locking groove until the connection of the flexible pipe is completed, When the flexible pipe is pulled after the connection is completed, the stop ring moves from the first locking groove over the annular protrusion to the second locking groove, so that the push nut is pulled out from the joint body.
- the indicator ring is exposed from the joint body, and the normal connection of the flexible pipe can be confirmed,
- the stop ring extends from the second locking groove over the annular protrusion and the first locking groove.
- the engagement with the annular groove is received by the third locking groove, so that the push nut can be removed from the joint body.
- a second pipe joint of the present invention includes a push nut into which a pipe is inserted, a joint main body into which the push nut is partially inserted, a seal member that seals the pipe and the joint main body, and the pipe.
- the locking mechanism includes a stop ring, an annular groove formed on an outer surface of the push nut so as to receive the stop ring, and an inner surface of the joint body so as to receive the stop ring and communicate with each other.
- Consisting of a plurality of locking grooves formed in The stop ring is engaged across the annular groove and the first locking groove until the connection of the pipe is completed, When the pipe is connected to the pipe joint, the stop ring moves from the first locking groove to the second locking groove on the inlet side, and thus into the annular groove and the second locking groove. It is characterized by being held across.
- the second pipe joint includes elastic means that is unlocked and extended when pushed at the tip of the pipe, and the seal member pushed in the inlet direction by extension of the elastic means includes the pipe, the joint body, and the like. Is preferably sealed.
- each of the first and second locking grooves has a tapered groove portion, and both the tapered groove portions are adjacent to each other to form an annular projecting portion whose both side surfaces are inclined. It is preferable that the annular protrusion can be moved in both directions between the first locking groove and the second locking groove.
- the inclination angle of the side surface of the annular protrusion is preferably set so that the stop ring exceeds the annular protrusion by the action of the elastic means.
- an indicator is provided on the push nut, and the indicator is concealed in the joint body before connection of the pipe, but from the joint body when the pipe is connected to the pipe joint. It is preferred that it is exposed so that normal connection of the tube can be confirmed.
- the indicator is preferably a colored layer or a detachable colored ring.
- the stop ring is a third locking groove on the back side of the first locking groove. It is preferable that the engagement with the annular groove is released and the push nut can be removed from the joint body.
- the second pipe joint is suitable for connecting flexible pipes.
- a preferable example of the second pipe joint is a push nut into which a flexible pipe is inserted, a joint main body into which the push nut is partially inserted, and the lock is released when the tip of the flexible pipe is released to extend.
- An elastic means a seal member that is pushed in the inlet direction by extension of the elastic means to seal the flexible pipe and the joint body, and is pushed by the seal member and contacts the push nut to the flexible pipe.
- the locking mechanism includes a stop ring, an annular groove formed on an outer surface of the push nut so as to receive the stop ring, and an inner surface of the joint body so as to receive the stop ring and communicate with each other. Consisting of a plurality of locking grooves formed in The stop ring is engaged across the annular groove and the first locking groove until the elastic means is pushed and extended at the tip of the flexible tube, When the flexible pipe is connected to the pipe joint by the extension of the elastic means, the stop ring moves from the first locking groove to the second locking groove on the inlet side, and thus the annular groove and the first It is held across the two locking grooves.
- the second pipe joint include a push nut into which a flexible pipe is inserted, a joint body into which the push nut is partially inserted, and the lock is released when the tip of the flexible pipe is released to extend.
- An elastic means for sealing a seal member for sealing the flexible pipe and the joint body by being pushed toward the inlet by extension of the elastic means, and the flexible pipe by being pressed by the seal member and abutting the push nut
- a retainer that engages with the joint body, a locking mechanism that holds the push nut in a predetermined position with respect to the joint body, and an indicator ring provided on the push nut to confirm normal connection of the flexible pipe;
- the locking mechanism includes a stop ring, an annular groove formed on an outer surface of the push nut so as to receive the stop ring, and an inner surface of the joint body so as to receive the stop ring and communicate with each other.
- a second locking groove, a first locking groove and a third locking groove formed in order from the entrance side Each of the first and second locking grooves has a tapered groove, and both tapered grooves are adjacent to each other to form an annular protrusion having both side surfaces inclined,
- the stop ring is engaged across the annular groove and the first locking groove until the flexible pipe is connected,
- the stop ring moves from the first locking groove over the annular protrusion to the second locking groove, and the indicator ring is Exposed from the joint body so that the normal connection of the flexible pipe can be confirmed,
- the stop ring When the indicator ring is removed from the push nut and the push nut is pushed into the joint body, the stop ring extends from the second locking groove over the annular protrusion and the first locking groove.
- the engagement with the annular groove is received by the third locking groove, so that the push nut can be removed from the joint body.
- the first pipe joint of the present invention receives the stop ring and an annular groove formed on the outer surface of the push nut so as to receive the stop ring, and communicates with each other.
- the stop ring includes a plurality of locking grooves formed on the inner surface of the joint body, and the stop ring is engaged across the annular groove and the first locking groove until the connection of the pipe is completed.
- the stop ring moves from the first locking groove to the second locking groove on the inlet side, so that the push nut is moved from the joint body. Since it is pulled out, the pipe connection work and the normal connection confirmation work can be performed in two stages. Therefore, after construction, the construction manager can surely confirm whether or not normal construction has been performed from the appearance of the pipe joint. Especially when the construction site is narrow and dark, the construction manager's connection confirmation work is simple and reliable. Further, since the indicator ring is not exposed unless the connection confirmation work is performed, the connection confirmation work is not forgotten.
- the second pipe joint of the present invention receives a stop ring, an annular groove formed on an outer surface of the push nut so as to receive the stop ring, and receives the stop ring and communicates with each other.
- a locking mechanism comprising a plurality of locking grooves formed on the inner surface of the joint body, and the stop ring and the annular groove until the elastic means is pushed and extended at the tip of the tube.
- the indicator ring When the indicator ring is detachably provided on the push nut, it is possible to surely confirm the normal connection of the pipe only by visually observing the indicator ring. If the indicator ring is provided with the function of a disassembly ring, the disassembly of the pipe joint can be performed simply by removing the indicator ring and pushing the push nut into the joint body. As a result, the pipe can be removed from the pipe joint without being damaged, and can be reused as it is.
- FIG. 4 (a) is a partially enlarged sectional view showing each arc plate portion of the guide member shown in FIG. 3 (a). It is a fragmentary sectional side view which shows the push nut which the pipe joint by 1st embodiment has. It is sectional drawing which shows the 3rd sealing member which the pipe joint by 1st embodiment has.
- FIG. 4B is a partial cross-sectional view showing a state in which the third seal member of FIG.
- FIG. 5 is a cross-sectional view showing shapes and dimensions of first to third locking grooves of a joint body and an outer peripheral annular groove of a push nut in the first embodiment.
- it is a fragmentary sectional side view which shows the pipe joint of the state inserted until the flexible pipe contacted the slide member.
- it is a fragmentary sectional side view which shows the pipe joint of the state which the connection of the flexible pipe was completed.
- 1st embodiment it is a fragmentary sectional side view which shows the state which pulled the flexible pipe
- 1st embodiment it is a fragmentary sectional side view which shows the state where the preparation of the disassembly operation
- 2nd embodiment it is a perspective view which shows the state which assembled the elastic means.
- 2nd embodiment it is a partial cross section side view which shows the pipe joint of the state inserted until the flexible pipe contacted the slide member.
- 2nd embodiment it is a partial cross section side view which shows the pipe joint of the state which the connection of the flexible pipe was completed.
- it is sectional drawing which shows the positional relationship of a stop ring and a locking groove when it starts to insert a push nut in a coupling main body.
- it is sectional drawing which shows the positional relationship of the stop ring and latching groove in the middle of inserting a push nut in a coupling main body.
- FIG. 10 is a cross-sectional view showing shapes and dimensions of first to third locking grooves of a joint body and an outer peripheral annular groove of a push nut in a second embodiment.
- 2nd embodiment it is a fragmentary sectional side view which shows the state where the preparation of the disassembly operation
- 2nd embodiment it is a fragmentary sectional side view which shows the pipe joint of the disassembled state.
- 3rd embodiment it is a partial cross section side view which shows the pipe joint of the state which the connection of the flexible pipe was completed.
- This pipe joint has a structure in which a flexible pipe connection process and a flexible pipe connection confirmation process are performed in two actions.
- a flexible pipe connection process and a flexible pipe connection confirmation process are performed in two actions.
- the pipe joint 1 has an inner hole 21 into which a flexible pipe (for example, a resin-coated metal corrugated pipe) is inserted from one end side.
- a joint body 2 having a threaded portion 22 formed on the other end side, a push nut 3 partially inserted into the joint body 2, elastic means 4 mounted inside the joint body 2,
- One seal member 5, a retainer 6, a stop ring 7, a second seal member 8, a third seal member 9, and an indicator ring 10 are provided.
- the inner hole 21 of the joint body 2 has an inner diameter larger than the inner diameter of the male screw portion 22 in order from the male screw portion 22 side, and the elastic means 4 and the seal member 5 are A first inner diameter portion 21a that is slid and received, and a second inner diameter portion 21b that has an inner diameter larger than the inner diameter of the first inner diameter portion 21a and that receives the retainer 6 and the push nut 3 by sliding.
- an inner annular protrusion 23 is provided at the back end of the first inner diameter portion 21a
- an annular groove 24 is provided at the inlet end of the second inner diameter portion 21b.
- the second inner diameter portion 21b is provided with first to third locking grooves 171, 172, 173 to which the stop ring 7 is mounted so as to be movable in the axial direction.
- the push nut 3 includes a tip 31 having a tapered surface 31a that contacts the retainer 6, an outer peripheral annular groove 32 into which the stop ring 7 enters, an annular ring
- the outer peripheral annular groove 33 for receiving the second seal member 8, the annular groove 34 for receiving the indicator ring 10 at a position close to the inlet end of the joint body 2, and the annular third seal member 9 are received.
- a communication hole for example, a circular hole
- An inner end portion of the inner flange portion 37 is a burred portion 37a bent inwardly (inner circumferential annular groove 35 side). Further, the selectively permeable member 12 is attached to the communication hole 36. It is preferable that the push nut 3 has a smooth outer peripheral surface so that it is difficult to be gripped by hand so as not to accidentally slide before connection or during connection work.
- Elastic means The elastic means 4 mounted between the joint body 2 and the push nut 3 is locked in the joint body 2 before the flexible pipe 100 is mounted.
- the lock (locked state) is released when inserted to the back of 2, and the first seal member 5 is pressed in the direction opposite to the insertion direction of the flexible tube 100, so that the retainer 6 is tapered at the tip of the push nut 2. It is means for contacting the surface 31a.
- the elastic means 4 includes a compression coil spring 41 (FIG. 1 shows a compressed state), a substantially cylindrical guide member 42 having an L-shaped cross section, and an inner side of the guide member 42. It comprises a substantially cylindrical slide member 43 provided to be movable in the axial direction.
- the guide member 42 formed of an elastic metal plate has a hollow disc-like support portion 421 and a position along the circumferential direction of the hollow disc-like support portion 421 in the axial direction.
- the arc plate portion 422 has a plurality of arc plate portions 422 extending slightly inclined inward, and the arc plate portion 422 has a portion (folded portion) 422a bent obliquely outward at the tip.
- a small protrusion 423 is provided on the outer surface of the bent portion 422a of each arc plate portion 422.
- the slide member 43 includes a cylindrical portion 431 and a thick flange portion 432 provided at an end portion of the cylindrical portion 431.
- the compression coil spring 41 includes the hollow disk-like support portion 421 of the guide member 42 and the inner annular protrusion 23 of the joint body 2.
- the tip bent portion 422a of the arc plate portion 422 of the guide member 42 is engaged with the inner annular protrusion 23.
- the slide member 43 is disposed inside the guide member 42, and the arc plate portion 422 of the guide member 42 is sandwiched between the inner annular protrusion 23 of the joint body 2 and the flange portion 432 of the slide member 43.
- the inner diameter of the inner annular projection 23 and the flange portion 432 are adjusted so that the clamping force of the arc plate 422 of the guide member 42 by the inner annular projection 23 and the flange 432 is larger than the elastic force of the compression coil spring 41.
- the outer diameter and the thickness of the arc plate portion 422 are determined.
- the first seal member 5 that seals the tip of the metal corrugated tube 101 includes, for example, an airtight packing 51 made of rubber, and a metal guide 52 having an L-shaped cross section fixed to the packing 51. , And a fireproof packing 53 seated on the guide 52.
- the airtight packing 51 has an outer diameter slightly larger than the inner diameter of the first inner diameter portion 21a so as to be in close contact with the first inner diameter portion 21a of the joint body 2, and the outer diameter of the metal corrugated tube 101 (the outer diameter of the peak portion). ) Has a slightly smaller inner diameter.
- the hermetic packing 51 also has a length for sealing several peaks (for example, two peaks) of the metal corrugated tube 101, and can seal the outer peripheral side of the metal corrugated tube 101 in an airtight manner.
- the packing 51 is preferably formed of nitrile butadiene rubber (NBR) or the like having excellent gas permeation resistance since it is necessary to maintain the sealing performance for a long period of time.
- NBR nitrile butadiene rubber
- the fireproof packing 53 is thermally expanded to fill the gap between the fitting body 2 and the metal corrugated pipe 101, thus preventing gas leakage.
- the packing 51 is burnt out, the elastic means 4 expands and comes into contact with the guide member 42, so that the thermally expanded refractory packing 53 is restricted from moving so that the inner surface of the joint body 2 and the outer peripheral surface of the metal corrugated pipe 101 are connected. Seal.
- Examples of the fireproof packing 53 include rubbers such as natural rubber (NR), nitrile butadiene rubber (NBR), chloroprene rubber (CR), ethylene-propylene rubber (EPR), ethylene-propylene-diene rubber (EPDM), and silicone rubber (SR). And a graphite intercalation compound that thermally expands in a non-foamed state, a vulcanizing agent, and a kneaded material such as a filler and a softening material, if necessary.
- the graphite intercalation compound is obtained, for example, by treating graphite with sulfuric acid. When the graphite intercalation compound is heated to 170 ° C.
- the volume of the refractory packing 53 and the compounding amount of the graphite intercalation compound are preferably set in consideration of the expansion amount of the refractory packing 53 and the gas permeability after expansion. From the viewpoint of sealing properties, the fireproof packing 53 preferably has a Shore A hardness of 50 to 80.
- the retainer 6 made of an elastically deformable material (for example, engineering plastic) extends from the cylindrical base 61 and the cylindrical base 61 at equal intervals in the circumferential direction. And a claw portion 63 made of metal (for example, brass) provided at the tip of each segment 62.
- the outer surface of each segment 62 is a tapered surface 62a that comes into contact with the tip tapered surface 31a of the push nut 3. Since the inner diameter of the cylindrical base 61 and the segment 62 of the retainer 6 is larger than the outer diameter of the crest of the metal corrugated tube 101, it does not get caught when the flexible tube 100 is inserted under no load condition.
- the stop ring 7 is an elastically deformable C-shaped member and is one of the first to third locking grooves 171, 172, 173 provided in the joint body 2 according to the construction work stage. And the push nut 3 is held (locked) at any of a plurality of positions of the joint body 2.
- the stop ring 7 is preferably made of an elastic metal wire such as austenitic stainless steel.
- the second seal member 8 received in the outer peripheral annular groove 33 of the push nut 3 is in close contact with the joint body 2 to seal the push nut 3 and the joint body 2 from the outside. Prevent rainwater intrusion.
- the second seal member 8 is preferably an O-ring made of an olefin rubber such as ethylene-propylene-diene rubber (EPDM).
- the third seal member 9 received in the inner peripheral annular groove 35 of the push nut 3 has a substantially L-shaped cross-section.
- a lip packing having an annular main body portion 9a fitted in the circumferential annular groove 35 and an inner lip 9b extending from the annular main body portion 9a is preferable. Since this lip packing having an L-shaped cross section is shorter in the axial direction than a lip packing having a T-shaped cross section used for a second pipe joint described later, it is effective for making the pipe joint compact.
- the lip packing is preferably made of an olefin rubber such as EPDM.
- the annular main body 9a has a step portion 9c extending outward (inner flange portion 37 side) from the inner lip 9b. As shown in FIG. 4 (c), the step 9c of the third seal member 9 is locked to the burrs 37a of the inner flange portion 37.
- the inner lip 9b is elastically bent to the back side and presses the flexible tube 100 with a desired seal surface pressure. As a result, the push nut 3 and the flexible pipe 100 are sealed to prevent rainwater from entering from the outside.
- the insertion of the flexible tube 100 causes a stress in the back side direction to be applied to the third seal member 9, but the engagement of the step 9c of the third seal member 9 with the burr 37a causes the third seal member 9 to There is no detachment from the annular groove 35.
- the indicator ring 10 is attached to the outer periphery of the push nut 3.
- a ring groove 34 is detachably mounted.
- the indicator ring 10 is a metal C-shaped ring and has an inner diameter smaller than the outer diameter of the outer peripheral annular groove 34 in an unloaded state. In a state where the push nut 3 is inserted into the joint body 2, the indicator ring 10 is covered with the annular groove 24 at the inlet end of the joint body 2, and cannot be seen from the outside.
- the indicator ring 10 is preferably colored differently from the joint body 2 and the push nut 3 so that the complete joining of the flexible pipe 100 to the pipe joint 1 can be visually confirmed.
- Permselective member 12 is provided in the communicating hole 36 of the push nut 3 in order to detect gas leakage that occurs when a nail is accidentally driven into the corrugated pipe 101 during piping construction. Yes. Since the leaked gas enters the gap between the corrugated tube 101 and the resin coating 102, it can be guided to the outside through the selectively permeable member 12 and detected by a gas sensor or the like.
- the permselective member 12 is a porous member that has gas permeability but can prevent intrusion of moisture, dust, and the like for a long time after pipe construction.
- Such a porous member is preferably a porous body of a polymer such as polyolefin (polyethylene, polypropylene, etc.), polymethyl methacrylate, polystyrene, ethylene vinyl acetate copolymer, polytetrafluoroethylene.
- a polymer such as polyolefin (polyethylene, polypropylene, etc.), polymethyl methacrylate, polystyrene, ethylene vinyl acetate copolymer, polytetrafluoroethylene.
- the locking mechanism 11 includes first to third locking grooves 171, 172, and 173 provided on the inner surface of the joint body 2. And an outer peripheral annular groove 32 provided in the push nut 3.
- the first locking groove 171 has an annular groove 171a (axial length: La1) and a taper that decreases in diameter from the inner surface of the annular groove 171a toward the inlet side (left side in FIG. 6).
- a tapered groove 171b having a surface (length in the axial direction: Lb1, taper angle: ⁇ 1).
- the second locking groove 172 communicating with the tapered groove portion 171b of the first locking groove 171 has a tapered groove portion 172b (length: Lb2, taper angle: ⁇ 2) having a tapered surface whose diameter increases toward the inlet side. ) And an annular groove 172a (length in the axial direction: La2) having an inner surface continuous with the tapered groove 172b.
- the tapered groove 171b of the first locking groove 171 and the tapered groove 172b of the second locking groove 172 form a mountain-shaped inner annular protrusion 174 (length Lb).
- the third locking groove 173 (length in the axial direction: L3) communicates with the annular groove 171a of the first locking groove 171.
- the first locking groove 171 and the second locking groove 172 can be moved smoothly from the first locking groove 171 to the second locking groove 172 by the insertion operation of the flexible tube 100.
- the total length L1 is more than twice the diameter D of the stop ring 7.
- first and second locking grooves 171 and 172 communicate with each other via a mountain-shaped inner annular protrusion 174, a force for reducing the diameter of the stop ring 7 to be smaller than the inner diameter of the inner annular protrusion 174 is pressed.
- the stop ring 7 can be moved from the first locking groove 171 to the second locking groove 172, or moved from the second locking groove 172 to the first locking groove 171. It can also be made.
- the inner annular protrusion 174 causes the stop ring 7 accommodated in the first locking groove 171 to move to the second locking groove 172. To prevent.
- the taper angles ⁇ 1 and ⁇ 2 are the same, but they may be different. If the taper angles ⁇ 1 and ⁇ 2 are too large, it is difficult to move the stop ring 7, and if it is too small, it is difficult to hold the stop ring 7 in the first or second locking grooves 171 and 172.
- the stop ring 7 remains held in the first locking groove 171 in the connection process of the flexible tube 100, and (b) the stop ring 7 starts only in the connection confirmation process of the flexible tube 100.
- the inclination angles (taper angles) ⁇ 1 and ⁇ 2 of the side surfaces of the inner annular protrusion 174 are set so that the first engagement groove 171 moves over the inner annular protrusion 174 to the second engagement groove 172. Must be set.
- the stop ring 7 does not exceed the inner annular protrusion 174 by the action of the elastic means 4 (the restoring force of the compression coil spring 41), but (b) the flexible pipe 100 is pulled to confirm the connection.
- the taper angles ⁇ 1 and ⁇ 2 are set to 40 to 50, for example, so that a good response (click feeling) can be obtained when the average worker performs the operations (a) and (b) ⁇ ⁇ . It is preferable to set to °.
- the taper angles ⁇ 1 and ⁇ 2 can be appropriately changed according to the restoring force of the compression coil spring 41.
- the length La1 + Lb1 of the first locking groove 171 is preferably approximately the same as the diameter D of the stop ring 7.
- the depth D 172 of the second engaging groove 172 is smaller than the diameter D of the stop ring 7, preferably specifically 0.6 to 0.7 times the diameter D.
- the length La2 + Lb2 of the second locking groove 172 is preferably longer than the diameter D of the stop ring, specifically 1.3 to 1.4 times.
- the stop ring 7 can be moved smoothly and the stop ring 7 can be securely held in the first and second locking grooves 171 and 172, respectively.
- the length La2 + Lb2 of the second locking groove 172 is preferably set in the range of 1.2 to 1.6 times the length La1 + Lb1 of the first locking groove 171.
- the length L3 of the third locking groove 173 is also larger than the diameter D of the stop ring 7, specifically, preferably 1.1 to 1.2 times.
- the outer peripheral annular groove 32 provided in the push nut 3 has a depth D 32 (specifically 1.1 to 1.2 times) exceeding the diameter D of the stop ring 7 and is slightly longer than the diameter D of the stop ring 7. And L32 (specifically, 1.05 to 1.1 times).
- the stop ring 7 Since the outer peripheral annular groove 32 is deeper than the diameter D of the stop ring 7, the stop ring 7 is completely accommodated in the outer peripheral annular groove 32, and the push nut 3 can slide in the joint body 2 without resistance. While the push nut 3 is entering, the outer peripheral annular groove 32 is aligned with the second locking groove 172, and the stop ring 7 enters the second locking groove 172 as shown in FIG. When the push nut 3 is slid, the stop ring 7 enters the first locking groove 171 as shown in FIG. Since the depth D 171 of the first locking groove 171 is smaller than the diameter D of the stop ring 7, the stop ring 7 straddles the first locking groove 171 and the outer peripheral annular groove 32. In this state, the tip of the push nut 3 is in contact with the retainer 6, and the pipe joint 1 is ready for use.
- the retainer 6 pushed by the first seal member 5 slides in the direction of the arrow in FIG. 8 and is pressed against the tip tapered surface 31a of the push nut 3.
- the segment 62a of the segment 62 of the retainer 6 contacts the taper surface 31a of the push nut 3, the segment 62 is deformed inward, the taper surface 62a of the segment 62 is in close contact with the taper surface 31a of the push nut 3, and the segment 62
- the 62 claw parts 63 engage with the valleys of the metal corrugated pipe 101. As a result, the flexible pipe 100 is not detached from the pipe joint 1.
- the compression coil spring 41 extends instantaneously and pushes the metal guide member 42, so that a clicking sound is made. By this click sound, it can be confirmed that the flexible pipe 100 is normally joined to the pipe joint 1.
- the packing 51 expands in the radial direction due to axial compression by the restoring force, so that the sealing performance between the joint body 2 and the flexible tube 100 is improved. Therefore, even if the corrugated tube 101 is somewhat deformed (for example, flattened or bent), the flexible tube 100 can be joined to the joint body 2 in an airtight manner.
- the sealing member 8 ensures the sealing performance between the joint body 2 and the push nut 3, and the sealing member 9 that is in close contact with the outer peripheral surface of the flexible pipe 100 secures the sealing performance between the flexible tube 100 and the pushing nut 3. Prevent intrusion of rainwater.
- the stop ring 7 moves from the first locking groove 171 to the second locking groove 172 over the inner annular protrusion 174, and the second locking groove 172 and the outer peripheral annular groove 32 are held at a position straddling.
- the length that the push nut 3 comes out is La2 + Lb2.
- the stop ring 7 pushed by the outer peripheral annular groove 32 hits the vertical inner wall on the inlet side of the second locking groove 172, so that the push nut 3 does not slide. Absent.
- the push nut 3 is pushed into the joint body 2, it does not slide easily due to the elastic force of the compression coil spring 41.
- the indicator ring 10 that appears from the joint body 2 allows the construction manager to confirm the completion of the connection of the flexible pipe by palpation even when the construction site is narrow or dark. If at least the outer peripheral surface of the indicator ring 10 is colored in a color different from that of the joint body 2 and the push nut 3, the completion of the connection of the flexible pipe can be confirmed visually. In this way, by adding a step of pulling the flexible pipe 100 after the flexible pipe 100 is pushed in, not only can the connection completion of the flexible pipe 100 to the pipe joint 1 be surely confirmed, but also whether the connection work has been performed normally. Anxiety can be completely eliminated.
- the flexible pipe 100 to which the elastic means 4 (compression coil spring 41, guide member 42 and slide member 43), the seal member 5, the retainer 6 and the push nut 3 are mounted from the joint body 2 is provided. And the seal member 5, the retainer 6, and the push nut 3 can be removed from the flexible tube 100. By such a disassembling operation, the flexible tube 100 can be removed without being damaged at all, and can be reused as it is.
- the pipe joint according to the second embodiment of the present invention includes a joint main body and a shape of a push nut, elastic means, a locking groove, an indicator ring, and a third seal member. Since there is basically no difference except for the pipe joint according to the first embodiment, the following description will be focused on the difference.
- the inner hole 21 of the joint body 2 has a third inner diameter that has an inner diameter smaller than the inner diameter of the first inner diameter portion 21a on the back side (male thread portion 22 side) of the first inner diameter portion 21a. It has a part 21c.
- the third inner diameter portion 21c receives the slide member 43 when the compression coil spring 41 is opened.
- the elastic means 4 includes a compression coil spring 41, a substantially cylindrical guide member 42 having an L-shaped cross section, a hollow disk-like spacer member 44 supported by the guide member 42 together with the compression coil spring 41, and a guide member 42. And a substantially cylindrical slide member 43 provided to be movable in the axial direction on the inner diameter side. As shown in FIG. 13, the compression coil spring 41 and the guide member 42 are the same as those in the first embodiment.
- the spacer member 44 While holding the compression coil spring 41 in a compressed state between the hollow disk-shaped support portion 421 of the guide member 42 and the spacer member 44, the spacer member 44 is locked to the bent portion 422a of the guide member 42, and The inner surface of the bent portion 422a is supported by the flange portion 432 of the slide member 43 so that the bent portion 422a is not opened, and the compression coil spring 41 is kept in a compressed state.
- the elastic means 4 can be mounted inside the joint body 2 in a state where the components are integrated.
- the spacer member 44 is preferably formed of metal from the viewpoint of strength.
- the third seal member 19 is a lip packing having a T-shaped cross section, and a lip projecting inward from the central portion in the axial direction is bent and engaged with the flexible tube 100 with a desired seal surface pressure. 3 and the flexible tube 100 are sealed.
- the indicator ring 110 made of engineering plastic is detachably attached to the outer peripheral annular groove of the push nut 3.
- a plurality of protrusions 91 that fit into the outer peripheral annular groove of the push nut 3 are formed on the inner surface of the indicator ring 110 in order to facilitate attachment to and removal from the push nut 3.
- a concave portion 92 is formed on one end surface of the indicator ring 110, and an arc-shaped notch 93 is formed at one place on the inner surface.
- the indicator ring 110 is broken at the portion where the notch 93 is formed, and the indicator ring 110 can be removed. Since the indicator ring 110 bends with a small force due to the notch 93, the indicator ring 110 can be easily attached to the circumferential groove of the push nut 3.
- the projection 91 also facilitates mounting in the circumferential groove.
- the indicator ring 110 is preferably colored differently from the joint body 2 and the push nut 3 so that the connection confirmation operation can be visually confirmed.
- the push nut 3 has an annular rib 38 in the vicinity of the outer peripheral annular groove in which the indicator ring 110 is mounted.
- the locking mechanism 111 is formed from first to third locking grooves 271, 272, 273 that are provided on the inner surface of the joint body 2 and communicate with each other. And the outer circumferential annular groove 32 provided in the push nut 3.
- the first locking groove 271 has an annular groove portion 271a (axial length: La1) and a taper that decreases in diameter from the inner surface of the annular groove portion 271a toward the inlet side (left side in FIG. 18).
- a tapered groove portion 271b having a surface (length in the axial direction: Lb1, taper angle: ⁇ 1).
- the second locking groove 272 communicating with the tapered groove portion 271b of the first locking groove 271 has a tapered groove portion 272b (length: Lb2, taper angle: ⁇ 2) having a tapered surface whose diameter increases toward the inlet side. ) And an annular groove 272a (length in the axial direction: La2) having an inner surface continuous with the tapered groove 272b.
- An inner annular protrusion 274 (length Lb) having a trapezoidal cross section is formed by the tapered groove 271b of the first locking groove 271 and the tapered groove 272b of the second locking groove 272.
- the third locking groove 273 (length in the axial direction: L3) communicates with the annular groove portion 271a of the first locking groove 271.
- the first locking groove 271 and the second locking groove 272 are arranged so that the stop ring 7 can smoothly move from the first locking groove 271 to the second locking groove 272 by the insertion operation of the flexible tube 100.
- the total length L1 is more than twice the diameter D of the stop ring 7.
- the stop ring 7 can be moved from the first locking groove 271 to the second locking groove 272, and the second locking groove 272 can be moved to the first locking groove 271. It can also be moved to.
- the inner annular protrusion 274 causes the stop ring 7 accommodated in the first locking groove 271 to move to the second locking groove 272. To prevent.
- the taper angles ⁇ 1 and ⁇ 2 are the same, but they may be different. If the taper angles ⁇ 1, ⁇ 2 are too large, it is difficult to move the stop ring 7, and if it is too small, it is difficult to hold the stop ring 7 in the first or second locking grooves 271 and 272.
- the stop ring 7 is held in the first locking groove 271 before the flexible pipe 100 is connected, but (b) the stop ring 7 is The inclination angles (taper angles) ⁇ 1 and ⁇ 2 of the side surfaces of the inner annular protrusion 274 are set so as to move from the one engagement groove 271 over the inner annular protrusion 274 to the second engagement groove 272.
- the taper angles ⁇ 1 and ⁇ 2 it is necessary to set the taper angles ⁇ 1 and ⁇ 2 to be relatively small so that the stop ring 7 exceeds the inner annular protrusion 274 by the action of the elastic means 4 (restoring force of the compression coil spring 41).
- the taper angles ⁇ 1 and ⁇ 2 are set to, for example, 20 to 30 ° so that a good feeling of response (click feeling) can be obtained when an average worker performs the above connection work. preferable.
- the taper angles ⁇ 1 and ⁇ 2 can be appropriately changed according to the restoring force of the compression coil spring 41.
- the length La1 + Lb1 of the first locking groove 271 is preferably approximately the same as the diameter D of the stop ring 7.
- the depth D 272 of the second engaging groove 272 may be the same as the depth D 271 of the first engaging groove 271.
- the length La2 + Lb2 of the second locking groove 272 is preferably longer than the diameter D of the stop ring, specifically 1.1 to 1.2 times.
- the stop ring 7 can be moved smoothly and the stop ring 7 can be securely held in the first and second locking grooves 271 and 272, respectively.
- the length La2 + Lb2 of the second locking groove 272 is preferably set in the range of 1.1 to 1.2 times the length La1 + Lb1 of the first locking groove 271.
- the depth D 273 and length L2 of the third locking groove 273, and the depth D 32 and length L32 of the outer peripheral annular groove 32 provided in the push nut 3 may be the same as in the first embodiment.
- the stop ring 7 moves to the second locking groove 272 as shown in FIG. That is, in the connecting process of the flexible tube 100, the stop ring 7 reaches the state shown in FIG. 17 (d) ⁇ ⁇ from the state shown in FIG. 17 (c) and extends over the second locking groove 272 and the outer peripheral annular groove 32.
- the push nut 3 comes out of the joint body 2 by the moving distance (La2 + Lb ⁇ Lb1) of the stop ring 7 from the first locking groove 271 to the second locking groove 272.
- the indicator ring 110 is also exposed from the inlet-side annular groove of the joint body 2. Relative movement between the joint body 2 and the push nut 3 is blocked by the stop ring 7, and the push nut 3 and the flexible pipe 100 do not come out of the pipe joint 1 even if a pulling force is applied to the flexible pipe 100. Completion of the connection of the flexible pipe 100 to the pipe joint 1 can be confirmed by the exposed indicator ring 110 in this state.
- the indicator ring 110 allows the operator to confirm the completion of the connection of the flexible tube by palpation even when the construction site is narrow or dark. If at least the outer peripheral surface of the indicator ring 110 is colored in a color different from that of the joint body 2 and the push nut 3, the completion of the connection of the flexible pipe can be confirmed visually.
- the flexible pipe 100 on which the seal member 5, the retainer 6 and the push nut 3 are attached and the elastic means 4 (compression coil spring) 41, the guide member 42, the spacer member 44, and the slide member 43) can be taken out, and the seal member 5, the retainer 6 and the push nut 3 can be removed from the flexible tube 100.
- the flexible tube 100 can be removed without being damaged at all, and can be reused as it is.
- Pipe joint according to the third embodiment is a circle having the same width as the disassembling ring 120 as an indicator on the back side of the annular rib 38 of the push nut 3 as shown in FIG. It differs from the pipe joint according to the second embodiment in that an annular colored layer 39 is formed. Therefore, only the points different from the second embodiment will be described here.
- the colored layer 39 has a color different from that of the joint body 2 and the push nut 3 and is formed by painting or the like. Since the disassembly ring 120 that is detachably attached to the joint body 2 has a compressed C-shaped ring shape, even when the push nut 3 protrudes from the joint body 2 by the width G due to the release of the compression coil spring 41, the joint body Stays in the two annular grooves 24. Therefore, the annular colored layer 39 is exposed from the joint body 2.
- the disassembly ring 120 has a notch 93 on the outer peripheral surface for easy attachment to and detachment from the joint body 2.
- the disassembling ring 120 is pulled by hooking a key burr-like tool as in the case of the indicator ring shown in FIG. 18, and the portion where the notch 93 is formed is broken. Since the disassembling ring 120 is easily bent by the notch 93, the attachment work to the joint body 2 is facilitated.
- This disassembly ring 120 is different from the indicator ring 110 shown in FIG. 18 in that no protrusion is formed on the inner surface and no color for visual confirmation is given.
- the pipe joint of the present invention has been described in detail with reference to the accompanying drawings, the pipe joint of the present invention is not limited thereto, and various modifications can be made within the scope of the present invention.
- the joint body is not limited to a single screw socket, but may be one having both sockets, elbows, tees or female threads.
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Abstract
Description
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に形成された複数の係止溝とからなり、
前記ストップリングは前記管の接続完了まで前記環状溝と第一の係止溝に跨がって係合しており、
前記管の接続完了後に前記管に抜け方向の力を加えると、前記ストップリングは前記第一の係止溝からそれより入口側の第二の係止溝に移動し、もって前記管の正常な接続を確認できる程度に前記押ナットが前記継手本体から引き出されることを特徴とする。
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に形成された複数の係止溝とからなり、
前記ストップリングは前記フレキシブル管の接続完了まで前記環状溝と第一の係止溝に跨がって係合しており、
接続完了後に前記フレキシブル管を引っ張ると、前記ストップリングは前記第一の係止溝からそれより入口側の第二の係止溝に移動し、もって前記フレキシブル管の正常な接続を確認できる程度に前記押ナットが前記継手本体から引き出される。
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に入口側から順に形成された第二の係止溝、第一の係止溝及び第三の係止溝とからなり、
前記第一及び第二の係止溝はそれぞれテーパ状溝部を有し、両テーパ状溝部は隣接して両側面が傾斜した環状突部を形成し、
前記ストップリングは前記フレキシブル管の接続完了まで前記環状溝と前記第一の係止溝に跨がって係合しており、
接続完了後に前記フレキシブル管を引っ張ると、前記ストップリングは前記第一の係止溝から前記環状突部を越えて前記第二の係止溝に移動し、もって前記押ナットが前記継手本体から引き出されるとともに前記インジケータリングが前記継手本体から露出し、前記フレキシブル管の正常な接続を確認でき、
前記インジケータリングを前記押ナットから取り外し、前記押ナットを前記継手本体内に押し込むと、前記ストップリングは前記第二の係止溝から前記環状突部及び前記第一の係止溝を越えて前記第三の係止溝に受承されて前記環状溝との係合が解除され、もって前記押ナットを前記継手本体から取り外すことができることを特徴とする。
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に形成された複数の係止溝とからなり、
前記ストップリングは前記管の接続完了まで前記環状溝と第一の係止溝に跨がって係合しており、
前記管が前記管継手に接続すると、前記ストップリングは前記第一の係止溝からそれより入口側の第二の係止溝に移動し、もって前記環状溝と前記第二の係止溝に跨がって保持されることを特徴とする。
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に形成された複数の係止溝とからなり、
前記ストップリングは前記弾性手段が前記フレキシブル管の先端で押されて伸長する前まで前記環状溝と第一の係止溝に跨がって係合しており、
前記弾性手段の伸長により前記フレキシブル管が管継手に接続すると、前記ストップリングは前記第一の係止溝からそれより入口側の第二の係止溝に移動し、もって前記環状溝と前記第二の係止溝に跨がって保持される。
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に入口側から順に形成された第二の係止溝、第一の係止溝及び第三の係止溝とからなり、
前記第一及び第二の係止溝はそれぞれテーパ状溝部を有し、両テーパ状溝部は隣接して両側面が傾斜した環状突部を形成し、
前記ストップリングは前記フレキシブル管の接続前まで前記環状溝と前記第一の係止溝に跨がって係合しており、
前記弾性手段の伸長により前記フレキシブル管が管継手に接続すると、前記ストップリングは前記第一の係止溝から前記環状突部を越えて前記第二の係止溝に移動し、前記インジケータリングは前記フレキシブル管の正常な接続を確認できるように前記継手本体から露出し、
前記インジケータリングを前記押ナットから取り外し、前記押ナットを前記継手本体内に押し込むと、前記ストップリングは前記第二の係止溝から前記環状突部及び前記第一の係止溝を越えて前記第三の係止溝に受承されて前記環状溝との係合が解除され、もって前記押ナットを前記継手本体から取り外すことができることを特徴とする。
この管継手は、フレキシブル管の接続工程とフレキシブル管の接続が正常であることの確認工程とを二回のアクションで行う構造を有する。接続工程と接続確認工程とを分けることにより、施工現場が狭くて暗い場合でも、作業者がフレキシブル管の接続とその確認を簡単かつ確実に行うことができるだけでなく、施工後に施工管理者は管継手の外観から正常な施工が行われたか否かを確実に確認できる。特に接続工程と接続確認工程とを二回のアクションで行うので、接続確認を忘れることがない。
図1~図4に示すように、本発明の第一の実施形態による管継手1は、一端側からフレキシブル管(例えば樹脂被覆した金属コルゲート管)が挿入される内孔21を有し、他端側におねじ部22が形成された継手本体2と、継手本体2に部分的に挿入される押ナット3と、継手本体2の内部に装着される弾性手段4と、第一のシール部材5と、リテーナ6と、ストップリング7と、第二のシール部材8と、第三のシール部材9と、インジケータリング10とを有する。
図3に示すように、継手本体2の内孔21は、おねじ部22側から順に、おねじ部22の内径より大きな内径を有し、弾性手段4及びシール部材5をスライドして受承する第一の内径部21aと、第一の内径部21aの内径より大きな内径を有し、リテーナ6及び押ナット3をスライドして受承する第二の内径部21bとからなり、第一の内径部21aの奥側端部には内方環状突起部23が設けられており、第二の内径部21bの入口側端部には環状溝24が設けられている。第二の内径部21bには、ストップリング7が軸線方向に移動可能に装着される第一~第三の係止溝171、172、173が設けられている。
図4(a) に示すように、押ナット3は、リテーナ6に当接するテーパ面31aを有する先端部31と、ストップリング7が進入する外周環状溝32と、円環状の第二のシール部材8を受承する外周環状溝33と、継手本体2の入口端に近接する位置でインジケータリング10を受承する環状溝34と、円環状の第三のシール部材9を受承する内周環状溝35と、継手本体2の入口端付近に設けられた外気との連通孔(例えば円孔)36と、内周環状溝35を覆う入口端の内方フランジ部37とを有する。内方フランジ部37の内端部は、内側(内周環状溝35側)に屈曲したカエリ部37aになっている。また連通孔36に選択透過性部材12が装着される。接続前又は接続作業中に誤ってスライドさせないために、押ナット3は手で把持しにくいように滑らかな外周面を有するのが好ましい。
継手本体2と押ナット3との間に装着される弾性手段4は、フレキシブル管100の装着前には継手本体2内に係止されているが、フレキシブル管100を継手本体2の奥まで挿入したときにロック(係止状態)が解除されて、第一のシール部材5をフレキシブル管100の挿入方向と逆の方向に押圧し、もってリテーナ6を押ナット2の先端テーパ面31aに当接させる手段である。図3に示すように、弾性手段4は、圧縮コイルばね41(図1は圧縮された状態を示す。)と、L字形断面を有するほぼ円筒状のガイド部材42と、ガイド部材42の内側に軸線方向に移動可能に設けられるほぼ円筒状のスライド部材43とからなる。
金属コルゲート管101の先端部をシールする第一のシール部材5は、例えばゴム製の気密パッキン51と、パッキン51に固着された断面L字形の金属製ガイド52と、ガイド52に着座する耐火パッキン53とからなる。気密パッキン51は、継手本体2の第一の内径部21aに密着するように第一の内径部21aの内径よりやや大きい外径を有するとともに、金属コルゲート管101の外径(山部の外径)よりやや小さい内径を有する。気密パッキン51はまた金属コルゲート管101の数山分(例えば2山分)をシールする長さを有し、金属コルゲート管101の外周側を気密にシールすることができる。パッキン51は、長期間にわたってシール性能を保持する必要があるので、耐ガス透過性に優れたニトリルブタジエンゴム(NBR)等で形成するのが好ましい。
図1及び図2に示すように、弾性変形可能な材料(例えばエンジニアリングプラスチック)からなるリテーナ6は、円筒状基部61と、円筒状基部61から円周方向に等間隔で延出する複数のセグメント62と、各セグメント62の先端に設けられた金属(例えば黄銅)製の爪部63とを有する。各セグメント62の外面は押ナット3の先端テーパ面31aに当接するテーパ面62aとなっている。リテーナ6の円筒状基部61及びセグメント62の内径は金属コルゲート管101の山部の外径より大きいので、無負荷状態ではフレキシブル管100を挿入するときには引っ掛からない。しかしセグメント62間にスリットがあるので、後述する圧縮コイルばね41の復元力によりセグメント62のテーパ面62aが押ナット3の先端テーパ面31aに押圧されると、セグメント62は内方に曲げられる。その結果、セグメント62の先端に設けられた爪部63は金属コルゲート管101の谷部に係合する。
ストップリング7は弾性変形可能なC字状部材であり、施工作業段階に応じて継手本体2に設けられた第一~第三の係止溝171、172、173のいずれかに係合し、押ナット3を継手本体2の複数の位置のいずれかに保持する(ロックする)。この機能を有効に発揮するために、ストップリング7はオーステナイト系ステンレス鋼のような弾性金属の線材からなるのが好ましい。
押ナット3の外周環状溝33に受承された第二のシール部材8は継手本体2に密着し、押ナット3と継手本体2とをシールし、外部からの雨水の侵入を防止する。第二のシール部材8は、例えばエチレン-プロピレン-ジエンゴム(EPDM)等のオレフィン系ゴムからなるOリングが好ましい。
図4(b) に示すように、押ナット3の内周環状溝35に受承される第三のシール部材9はほぼL字状の断面を有し、内周環状溝35に嵌入する環状本体部9aと、環状本体部9aから延びる内方リップ9bとを有するリップパッキンであるのが好ましい。この断面L字状のリップパッキンは、後述する第二の管継手に用いる断面T字状のリップパッキンより軸線方向に短いので、管継手のコンパクト化に効果的である。リップパッキンは、例えばEPDM等のオレフィン系ゴムからなるのが好ましい。
フレキシブル管100の管継手1への接続完了を確認するとともに、フレキシブル管100が挿入された管継手1の分解作業を容易にするために、インジケータリング10が押ナット3の外周環状溝34に着脱自在に装着されている。インジケータリング10は金属製のC字状リングであり、無負荷状態では外周環状溝34の外径より小さい内径を有する。押ナット3を継手本体2に挿入した状態では、インジケータリング10は継手本体2の入口端の環状溝24に覆われており、外から見えない。しかし、フレキシブル管100の管継手1への接続完了を確認するために押ナット3を引っ張ると、後述するようにストップリング7が第二の係止溝172に入るとともに、インジケータリング10は継手本体2の環状溝24から露出する。フレキシブル管100の管継手1への完全な接合を目視で確認できるように、インジケータリング10を継手本体2及び押ナット3と異なる色にするのが好ましい。
配管施工時にコルゲート管101に誤って釘が打ち込まれたとき等に起こるガス漏れを検出するために、押ナット3の連通孔36に選択透過性部材12が設けられている。漏出したガスはコルゲート管101と樹脂被覆102との間隙に入るので、選択透過性部材12を通って外部に導き、ガスセンサ等により検知することができる。選択透過性部材12は、ガス透過性を有するが配管施工後長期間水分、塵芥等の侵入を防止し得る多孔質部材である。このような多孔質部材は、ポリオレフィン(ポリエチレン、ポリプロピレン等)、ポリメチルメタクリレート、ポリスチレン、エチレン酢酸ビニル共重合体、ポリテトラフルオロエチレン等のポリマーの多孔質体であるのが好ましい。
図5及び図6に示すように、係止機構11は、継手本体2の内面に設けられた相互に連通する第一~第三の係止溝171、172、173からなる係止溝集合体17と、押ナット3に設けられた外周環状溝32とからなる。図6に示すように、第一の係止溝171は、環状溝部171a(軸線方向長さ:La1)と、環状溝部171aの内面から入口側(図6で左側)に向って縮径するテーパ面を有するテーパ状溝部171b(軸線方向長さ:Lb1、テーパ角:α1)とからなる。第一の係止溝171のテーパ状溝部171bと連通する第二の係止溝172は、入口側に向って拡径するテーパ面を有するテーパ状溝部172b(長さ:Lb2、テーパ角:α2)と、テーパ状溝部172bに連なる内面を有する環状溝部172a(軸線方向長さ:La2)とからなる。第一の係止溝171のテーパ状溝部171bと第二の係止溝172のテーパ状溝部172bにより山形の内方環状突部174(長さLb)が形成される。第三の係止溝173(軸線方向長さ:L3)は第一の係止溝171の環状溝部171aに連通する。
(a) 管継手の組立
配管現場で直ぐに使用できるような形態に管継手を組み立てるために、まず治具を用いて圧縮コイルばね41、ガイド部材42及びスライド部材43を図1に示すように継手本体2内にセットし、次いで金属製ガイド52が固着された気密パッキン51及び耐火パッキン53からなる第一のシール部材5、及びリテーナ6を継手本体2内に挿入し、最後に第二のシール部材8、第三のシール部材9及びインジケータリング10を装着した押ナット3を継手本体2内に挿入する。このとき、図5(a) に示すようにストップリング7をまず押ナット3の外周環状溝32に入れる。外周環状溝32はストップリング7の直径Dより深いので、ストップリング7は外周環状溝32に完全に収容され、押ナット3は継手本体2内を抵抗なくスライドできる。押ナット3の進入途中で外周環状溝32は第二の係止溝172と整合し、ストップリング7は図5(b) に示すように第二の係止溝172内に進入するが、さらに押ナット3をスライドさせるとストップリング7は山形の内方環状突部174を越えて図5(c) に示すように第一の係止溝171に進入する。第一の係止溝171の深さD171はストップリング7の直径Dより小さいので、ストップリング7は第一の係止溝171と外周環状溝32とに跨がる。この状態で押ナット3の先端はリテーナ6に当接しており、管継手1は使用可能な状態にある。
数山分の長さの被覆樹脂102を先端部から除去したフレキシブル管100を管継手1に挿入すると、金属コルゲート管101の先端はスライド部材43の円筒部431に当接する。ここで押ナット3を継手本体2内に押し込むと、図7に示すようにスライド部材43のフランジ部432は継手本体2の内方環状突起部23からずれ、ガイド部材42の円弧板部422は内方環状突起部23とスライド部材43のフランジ部432との挟持から開放される。そのため、図8に示すように圧縮コイルばね41の復元力により、ガイド部材42は第一のシール部材5のパッキン51を押す。第一のシール部材5に押されたリテーナ6は図8の矢印方向にスライドし、押ナット3の先端テーパ面31aに押し付けられる。リテーナ6のセグメント62のテーパ面62aが押ナット3のテーパ面31aと当接すると、セグメント62は内側に変形し、セグメント62のテーパ面62aが押ナット3のテーパ面31aに密着するとともに、セグメント62の爪部63が金属コルゲート管101の谷部に係合する。その結果、フレキシブル管100は管継手1から脱着しなくなる。フレキシブル管100のこの挿入動作の際、圧縮コイルばね41が瞬時に延びて金属製ガイド部材42を押すので、カチッというクリック音がする。このクリック音により、フレキシブル管100が管継手1に正常に接合されたことを確認できる。
図8に示す状態でフレキシブル管100は管継手1に正常に接合されているが、それを確認するとともに、施工管理者が後で確認できるようにするために、フレキシブル管100を管継手1から引っ張る。フレキシブル管100はゴム製気密パッキン51及びリテーナ6の爪部63により押ナット3に強固に連結しているので、押ナット3はフレキシブル管100と一体となって継手本体2から僅かに抜け、図9に示すようにインジケータリング10が継手本体2の環状溝24から現れる。
図10に示すように押ナット3からインジケータリング10を取り外し、押ナット3を継手本体2内に押し込むと、図5(e) に示すようにストップリング7は、第二の係止溝172から内方環状突部174及び第一の係止溝171を越えて第三の係止溝173に移動する。第三の係止溝173はストップリング7の直径Dより深いので、ストッ プリング7は第三の係止溝173内に完全に収まり、継手本体2と押ナット3との接続が解除され、押ナット3は継手本体2から引き抜ける状態になる。その結果、図3に示すように、継手本体2から弾性手段4(圧縮コイルばね41、ガイド部材42及びスライド部材43)と、シール部材5、リテーナ6及び押ナット3が装着されたフレキシブル管100とを取り出すことができ、またフレキシブル管100からシール部材5、リテーナ6及び押ナット3を取り外すことができる。このような分解作業により、フレキシブル管100は全く損傷を受けずに取り外せるので、そのまま再使用できる。
この管継手は、フレキシブル管の接続工程とフレキシブル管の接続が正常であることの確認工程とを一回のアクションで行う構造を有する。接続工程と接続確認工程とを同時に行うので、施工現場が狭くて暗い場合でもフレキシブル管の接続を素早く簡単に行うことができる。また施工後に施工管理者は管継手の外観から正常な施工が行われたか否かを確認できる。ただし接続確認工程を別途行う必要がない分、正常な接続を確認する作業を忘れずに行う必要がある。
図11及び図12に示すように、本発明の第二の実施形態による管継手は、継手本体及び押ナットの形状、弾性手段、係止溝、インジケータリング及び第三のシール部材に相違点がある以外、基本的に第一の実施形態による管継手と同じであるので、以下相違点を中心に説明する。
図17及び図18に示すように、係止機構111は、継手本体2の内面に設けられた相互に連通する第一~第三の係止溝271、272、273からなる係止溝集合体27と、押ナット3に設けられた外周環状溝32とからなる。図18に示すように、第一の係止溝271は、環状溝部271a(軸線方向長さ:La1)と、環状溝部271aの内面から入口側(図18で左側)に向って縮径するテーパ面を有するテーパ状溝部271b(軸線方向長さ:Lb1、テーパ角:α1)とからなる。第一の係止溝271のテーパ状溝部271bと連通する第二の係止溝272は、入口側に向って拡径するテーパ面を有するテーパ状溝部272b(長さ:Lb2、テーパ角:α2)と、テーパ状溝部272bに連なる内面を有する環状溝部272a(軸線方向長さ:La2)とからなる。第一の係止溝271のテーパ状溝部271bと第二の係止溝272のテーパ状溝部272bにより断面台形状の内方環状突部274(長さLb)が形成される。第三の係止溝273(軸線方向長さ:L3)は第一の係止溝271の環状溝部271aに連通する。
図11に示す状態の管継手1に数山分の長さの被覆樹脂102を先端部から除去したフレキシブル管100を挿入すると、図15に示すようにフレキシブル管100の金属コルゲート管101の先端がスライド部材43に突き当たる。このとき、ストップリング7は図17(a) 及び図17(b) の状態を経て図17(c) に示す状態に達し、第一の係止溝271と外周環状溝32に跨がるように保持される。
第三の実施形態による管継手は、図21に示すように押ナット3の環状リブ38の奥側に、インジケータとして分解用リング120と同じ幅の円環状の着色層39が形成されている点で、第二の実施形態による管継手と異なる。従って、ここでは第二の実施形態と異なる点だけ説明する。
Claims (22)
- 管が挿入される押ナットと、前記押ナットが部分的に挿入される継手本体と、前記管と前記継手本体とをシールするシール部材と、前記管に係合して前記管を抜け止めするリテーナと、前記継手本体に対して前記押ナットを所定の位置に保持する係止機構とを備え、
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に形成された複数の係止溝とからなり、
前記ストップリングは前記管の接続完了まで前記環状溝と第一の係止溝に跨がって係合しており、
前記管の接続完了後に前記管に抜け方向の力を加えると、前記ストップリングは前記第一の係止溝からそれより入口側の第二の係止溝に移動し、もって前記管の正常な接続を確認できる程度に前記押ナットが前記継手本体から引き出されることを特徴とする管継手。 - 請求項1に記載の管継手において、前記管の先端で押されるとロックが解除されて伸長する弾性手段を具備し、前記弾性手段の伸長により入口方向に押された前記シール部材が前記管と前記継手本体とをシールすることを特徴とする管継手。
- 請求項2に記載の管継手において、前記第一及び第二の係止溝はそれぞれテーパ状溝部を有し、両テーパ状溝部は隣接して両側面が傾斜した環状突部を形成し、前記ストップリングは前記環状突部を越えて前記第一の係止溝と前記第二の係止溝との間を双方向に移動できることを特徴とする管継手。
- 請求項3に記載の管継手において、前記環状突部の側面の傾斜角は、前記弾性手段の作用では前記ストップリングが前記環状突部を越えないが、接続確認のために前記管を引っ張る力では前記ストップリングが前記環状突部を越えるように、設定されていることを特徴とする管継手。
- 請求項1~4のいずれかに記載の管継手において、前記押ナットにインジケータが設けられており、前記インジケータは前記管の接続完了まで前記継手本体に隠蔽されており、接続完了後に前記管を引っ張ると前記押ナットが前記継手本体から引き出されるとともに前記インジケータが前記継手本体から露出し、もって前記管の正常な接続を確認できることを特徴とする管継手。
- 請求項5に記載の管継手において、前記インジケータが前記押ナットに着脱自在に装着されたリングであることを特徴とする管継手。
- 請求項6に記載の管継手において、前記インジケータリングを前記押ナットから取り外し、前記押ナットを前記継手本体内に押し込むと、前記ストップリングは前記第一の係止溝より奥側の第三の係止溝に受承されて前記環状溝との係合が解除され、もって前記押ナットを前記継手本体から取り外すことができることを特徴とする管継手。
- 請求項6又は7に記載の管継手において、前記インジケータリングが目視で視認できるように着色されていることを特徴とする管継手。
- 請求項1~8のいずれかに記載の管継手において、前記管がフレキシブル管であることを特徴とする管継手。
- フレキシブル管が挿入される押ナットと、前記押ナットが部分的に挿入される継手本体と、前記フレキシブル管の先端で押されるとロックが解除されて伸長する弾性手段と、前記弾性手段の伸長により入口方向に押されて前記フレキシブル管と前記継手本体とをシールするシール部材と、前記シール部材に押されて前記押ナットに当接することにより前記フレキシブル管に係合するリテーナと、前記継手本体に対して前記押ナットを所定の位置に保持する係止機構とを備え、
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に形成された複数の係止溝とからなり、
前記ストップリングは前記フレキシブル管の接続完了まで前記環状溝と第一の係止溝に跨がって係合しており、
接続完了後に前記フレキシブル管を引っ張ると、前記ストップリングは前記第一の係止溝からそれより入口側の第二の係止溝に移動し、もって前記フレキシブル管の正常な接続を確認できる程度に前記押ナットが前記継手本体から引き出されることを特徴とする管継手。 - フレキシブル管が挿入される押ナットと、前記押ナットが部分的に挿入される継手本体と、前記フレキシブル管の先端で押されるとロックが解除されて伸長する弾性手段と、前記弾性手段の伸長により入口方向に押されて前記フレキシブル管と前記継手本体とをシールするシール部材と、前記シール部材に押されて前記押ナットに当接することにより前記フレキシブル管に係合するリテーナと、前記継手本体に対して前記押ナットを所定の位置に保持する係止機構と、前記フレキシブル管の正常な接続を確認するために前記押ナットに設けられたインジケータリングとを備え、
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に入口側から順に形成された第二の係止溝、第一の係止溝及び第三の係止溝とからなり、
前記第一及び第二の係止溝はそれぞれテーパ状溝部を有し、両テーパ状溝部は隣接して両側面が傾斜した環状突部を形成し、
前記ストップリングは前記フレキシブル管の接続完了まで前記環状溝と前記第一の係止溝に跨がって係合しており、
接続完了後に前記フレキシブル管を引っ張ると、前記ストップリングは前記第一の係止溝から前記環状突部を越えて前記第二の係止溝に移動し、もって前記押ナットが前記継手本体から引き出されるとともに前記インジケータリングが前記継手本体から露出し、前記フレキシブル管の正常な接続を確認でき、
前記インジケータリングを前記押ナットから取り外し、前記押ナットを前記継手本体内に押し込むと、前記ストップリングは前記第二の係止溝から前記環状突部及び前記第一の係止溝を越えて前記第三の係止溝に受承されて前記環状溝との係合が解除され、もって前記押ナットを前記継手本体から取り外すことができることを特徴とする管継手。 - 管が挿入される押ナットと、前記押ナットが部分的に挿入される継手本体と、前記管と前記継手本体とをシールするシール部材と、前記管に係合して前記管を抜け止めするリテーナと、前記継手本体に対して前記押ナットを所定の位置に保持する係止機構とを備え、
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に形成された複数の係止溝とからなり、
前記ストップリングは前記管の接続完了まで前記環状溝と第一の係止溝に跨がって係合しており、
前記管が前記管継手に接続すると、前記ストップリングは前記第一の係止溝からそれより入口側の第二の係止溝に移動し、もって前記環状溝と前記第二の係止溝に跨がって保持されることを特徴とする管継手。 - 請求項12に記載の管継手において、前記管の先端で押されるとロックが解除されて伸長する弾性手段を具備し、前記弾性手段の伸長により入口方向に押された前記シール部材が前記管と前記継手本体とをシールすることを特徴とする管継手。
- 請求項13に記載の管継手において、前記第一及び第二の係止溝はそれぞれテーパ状溝部を有し、両テーパ状溝部は隣接して両側面が傾斜した環状突部を形成し、前記ストップリングは前記環状突部を越えて前記第一の係止溝と前記第二の係止溝との間を双方向に移動できることを特徴とする管継手。
- 請求項14に記載の管継手において、前記環状突部の側面の傾斜角が、前記弾性手段の作用で前記ストップリングが前記環状突部を越えるように設定されていることを特徴とする管継手。
- 請求項12~15のいずれかに記載の管継手において、前記押ナットにインジケータが設けられており、前記インジケータは前記管の接続前には前記継手本体に隠蔽されているが、前記管が管継手に接続すると前記継手本体から露出し、もって前記管の正常な接続を確認できることを特徴とする管継手。
- 請求項16に記載の管継手において、前記インジケータが着色層又は着脱自在のリングであることを特徴とする管継手。
- 請求項17に記載の管継手において、前記インジケータリングを前記押ナットから取り外し、前記押ナットを前記継手本体内に押し込むと、前記ストップリングは前記第一の係止溝より奥側の第三の係止溝に受承されて前記環状溝との係合が解除され、もって前記押ナットを前記継手本体から取り外すことができることを特徴とする管継手。
- 請求項17又は18に記載の管継手において、前記インジケータリングが目視で視認できるように着色されていることを特徴とする管継手。
- 請求項12~19のいずれかに記載の管継手において、前記管がフレキシブル管であることを特徴とする管継手。
- フレキシブル管が挿入される押ナットと、前記押ナットが部分的に挿入される継手本体と、前記フレキシブル管の先端で押されるとロックが解除されて伸長する弾性手段と、前記弾性手段の伸長により入口方向に押されて前記フレキシブル管と前記継手本体とをシールするシール部材と、前記シール部材に押されて前記押ナットに当接することにより前記フレキシブル管に係合するリテーナと、前記継手本体に対して前記押ナットを所定の位置に保持する係止機構とを備え、
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に形成された複数の係止溝とからなり、
前記ストップリングは前記弾性手段が前記フレキシブル管の先端で押されて伸長する前まで前記環状溝と第一の係止溝に跨がって係合しており、
前記弾性手段の伸長により前記フレキシブル管が管継手に接続すると、前記ストップリングは前記第一の係止溝からそれより入口側の第二の係止溝に移動し、もって前記環状溝と前記第二の係止溝に跨がって保持されることを特徴とする管継手。 - フレキシブル管が挿入される押ナットと、前記押ナットが部分的に挿入される継手本体と、前記フレキシブル管の先端で押されるとロックが解除されて伸長する弾性手段と、前記弾性手段の伸長により入口方向に押されて前記フレキシブル管と前記継手本体とをシールするシール部材と、前記シール部材に押されて前記押ナットに当接することにより前記フレキシブル管に係合するリテーナと、前記継手本体に対して前記押ナットを所定の位置に保持する係止機構と、前記フレキシブル管の正常な接続を確認するために前記押ナットに設けられたインジケータリングとを備え、
前記係止機構はストップリングと、前記ストップリングを受承するように前記押ナットの外面に形成された環状溝と、前記ストップリングを受承するとともに相互に連通するように前記継手本体の内面に入口側から順に形成された第二の係止溝、第一の係止溝及び第三の係止溝とからなり、
前記第一及び第二の係止溝はそれぞれテーパ状溝部を有し、両テーパ状溝部は隣接して両側面が傾斜した環状突部を形成し、
前記ストップリングは前記フレキシブル管の接続前まで前記環状溝と前記第一の係止溝に跨がって係合しており、
前記弾性手段の伸長により前記フレキシブル管が管継手に接続すると、前記ストップリングは前記第一の係止溝から前記環状突部を越えて前記第二の係止溝に移動し、前記インジケータリングは前記フレキシブル管の正常な接続を確認できるように前記継手本体から露出し、
前記インジケータリングを前記押ナットから取り外し、前記押ナットを前記継手本体内に押し込むと、前記ストップリングは前記第二の係止溝から前記環状突部及び前記第一の係止溝を越えて前記第三の係止溝に受承されて前記環状溝との係合が解除され、もって前記押ナットを前記継手本体から取り外すことができることを特徴とする管継手。
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012219997A (ja) * | 2011-04-14 | 2012-11-12 | Hitachi Metals Ltd | 差込式管継手 |
JP2014126147A (ja) * | 2012-12-26 | 2014-07-07 | Tokyo Gas Co Ltd | 管継手接続治具 |
JP2015108384A (ja) * | 2013-12-03 | 2015-06-11 | 日立金属株式会社 | 管継手 |
JP2015108407A (ja) * | 2013-12-04 | 2015-06-11 | 日立金属株式会社 | 管継手 |
JP2015108406A (ja) * | 2013-12-04 | 2015-06-11 | 日立金属株式会社 | 管継手 |
JP2015108405A (ja) * | 2013-12-04 | 2015-06-11 | 日立金属株式会社 | 管継手 |
JP2015132376A (ja) * | 2014-01-16 | 2015-07-23 | 株式会社サンコー | フレキ管継手 |
JP2015190568A (ja) * | 2014-03-28 | 2015-11-02 | 日立金属株式会社 | 管継手 |
JP2020172947A (ja) * | 2019-04-08 | 2020-10-22 | 光陽産業株式会社 | フレキシブル管用継手 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2475921B1 (en) * | 2009-09-11 | 2014-11-19 | Victaulic Company | Flexible assembly for sprinklers |
US9506592B2 (en) * | 2009-10-21 | 2016-11-29 | Brass-Craft Manufacturing Company | Supply stop with connection verification |
DE102013105253A1 (de) * | 2013-05-23 | 2014-11-27 | Johannes Schäfer vorm. Stettiner Schraubenwerke GmbH & Co. KG | Steckverbindung für Rohrleitungen mit Indikatorring |
RU2646685C2 (ru) | 2013-07-01 | 2018-03-06 | Уобтек Холдинг Корп. | Сбор, спуск и перепуск загрязняющего вещества в приспособлении для регулировки зазора |
MX365833B (es) * | 2013-07-01 | 2019-06-17 | Wabtec Holding Corp | Dispositivo de mitigacion de contaminantes para ajustador de tension. |
EP3131818B1 (en) * | 2014-04-15 | 2018-11-28 | Eaton Corporation | Bulkhead connector assembly |
EP3167220B1 (en) * | 2014-07-10 | 2021-04-07 | Eaton Intelligent Power Limited | Coupling assembly with vibration lock |
CA2975174C (en) | 2015-02-06 | 2023-05-09 | Westinghouse Air Brake Technologies Corporation | Vented draining slack adjuster end cap |
CN107250644B (zh) * | 2015-02-19 | 2019-09-20 | 日立金属株式会社 | 管接头 |
USD816811S1 (en) * | 2016-01-25 | 2018-05-01 | Poelsan Plastik Sanayi Ve Ticaret Anonim Sirketi | Pipe joint connection |
JP6922342B2 (ja) * | 2017-03-31 | 2021-08-18 | 日立金属株式会社 | 管継手 |
CN108543257A (zh) * | 2018-05-11 | 2018-09-18 | 泰州市三江消防器材有限公司 | 一种消防用成套设备 |
US20200300391A1 (en) | 2019-03-20 | 2020-09-24 | Nibco Inc. | Press fitting assembly |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003056776A (ja) | 1999-07-27 | 2003-02-26 | Osaka Gas Co Ltd | フレキシブルチューブ用継手 |
JP2004028112A (ja) | 2002-06-11 | 2004-01-29 | Rb Corp | フレキシブル管継手 |
JP3538090B2 (ja) | 1999-11-29 | 2004-06-14 | 株式会社喜多村合金製作所 | 管継手における確認孔保護カバー |
JP2007315549A (ja) * | 2006-05-29 | 2007-12-06 | Sankoo:Kk | コルゲート管用差込み継手及びストッパー |
JP2008032105A (ja) * | 2006-07-28 | 2008-02-14 | Sankoo:Kk | コルゲート管用差込み継手 |
JP2008038925A (ja) * | 2006-08-01 | 2008-02-21 | Sankoo:Kk | コルゲート管用差込み継手 |
JP2008281075A (ja) * | 2007-05-09 | 2008-11-20 | Sankoo:Kk | コルゲート管用差込み継手 |
JP2009008219A (ja) | 2007-06-29 | 2009-01-15 | Hitachi Metals Ltd | 差込式継手 |
JP2009058094A (ja) * | 2007-09-03 | 2009-03-19 | Sankoo:Kk | コルゲート管用差込み継手 |
JP2009079755A (ja) * | 2007-09-07 | 2009-04-16 | Hitachi Metals Ltd | コルゲイト管用継手 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3439944A (en) * | 1965-07-16 | 1969-04-22 | Bernhard Leutenegger | Nipple for pipe joints |
DE29719247U1 (de) * | 1997-10-29 | 1999-02-25 | Armaturenfabrik Hermann Voss GmbH + Co, 51688 Wipperfürth | Steckkupplung für Druckmittelsysteme |
DE10022085C1 (de) * | 2000-05-08 | 2001-09-20 | Schaefer Stettiner Schrauben | Schnellkupplung zum Verbinden von Medienleitungen |
CN100373085C (zh) * | 2001-10-04 | 2008-03-05 | 东京瓦斯株式会社 | 插入式管接头 |
-
2010
- 2010-05-07 JP JP2011513321A patent/JP5400145B2/ja active Active
- 2010-05-07 ES ES10774866.7T patent/ES2689735T3/es active Active
- 2010-05-07 CN CN2010800207204A patent/CN102439346B/zh active Active
- 2010-05-07 US US13/320,145 patent/US9182061B2/en active Active
- 2010-05-07 WO PCT/JP2010/057832 patent/WO2010131609A1/ja active Application Filing
- 2010-05-07 KR KR1020117029555A patent/KR101725169B1/ko active IP Right Grant
- 2010-05-07 EP EP10774866.7A patent/EP2431645B1/en active Active
- 2010-05-10 TW TW099114776A patent/TWI507626B/zh active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003056776A (ja) | 1999-07-27 | 2003-02-26 | Osaka Gas Co Ltd | フレキシブルチューブ用継手 |
JP3538090B2 (ja) | 1999-11-29 | 2004-06-14 | 株式会社喜多村合金製作所 | 管継手における確認孔保護カバー |
JP2004028112A (ja) | 2002-06-11 | 2004-01-29 | Rb Corp | フレキシブル管継手 |
JP2007315549A (ja) * | 2006-05-29 | 2007-12-06 | Sankoo:Kk | コルゲート管用差込み継手及びストッパー |
JP2008032105A (ja) * | 2006-07-28 | 2008-02-14 | Sankoo:Kk | コルゲート管用差込み継手 |
JP2008038925A (ja) * | 2006-08-01 | 2008-02-21 | Sankoo:Kk | コルゲート管用差込み継手 |
JP2008281075A (ja) * | 2007-05-09 | 2008-11-20 | Sankoo:Kk | コルゲート管用差込み継手 |
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Also Published As
Publication number | Publication date |
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EP2431645A4 (en) | 2017-05-03 |
JP5400145B2 (ja) | 2014-01-29 |
CN102439346A (zh) | 2012-05-02 |
JPWO2010131609A1 (ja) | 2012-11-01 |
CN102439346B (zh) | 2013-11-06 |
TWI507626B (zh) | 2015-11-11 |
EP2431645B1 (en) | 2018-07-11 |
US9182061B2 (en) | 2015-11-10 |
KR101725169B1 (ko) | 2017-04-10 |
KR20120024748A (ko) | 2012-03-14 |
EP2431645A1 (en) | 2012-03-21 |
ES2689735T3 (es) | 2018-11-15 |
TW201102550A (en) | 2011-01-16 |
US20120068454A1 (en) | 2012-03-22 |
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