WO2010018809A1 - Joint for flexible tube - Google Patents
Joint for flexible tube Download PDFInfo
- Publication number
- WO2010018809A1 WO2010018809A1 PCT/JP2009/064127 JP2009064127W WO2010018809A1 WO 2010018809 A1 WO2010018809 A1 WO 2010018809A1 JP 2009064127 W JP2009064127 W JP 2009064127W WO 2010018809 A1 WO2010018809 A1 WO 2010018809A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- joint
- snap ring
- flexible
- sealing material
- flexible pipe
- 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
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
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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
- F16L25/0054—Joints for corrugated pipes with specially shaped sealing rings
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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
- F16L25/0081—Pipe joints comprising a liquid or fusible seal
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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
- F16L33/26—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses specially adapted for hoses of metal
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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
Definitions
- the present invention relates to a joint for flexible pipes that is unlikely to cause fluid leakage and is less likely to become unusable due to unforeseen circumstances.
- Patent Document 1 discloses a joint for flexible pipe as shown in FIG.
- This flexible pipe joint includes a joint body 200, a sleeve 202, a ring spring 204, an O-ring 206, a packing 208, and a push ring 210.
- the joint body 200 is formed with a large-diameter hole 200a, a medium-diameter hole 200b, and a small-diameter hole 200c in order from the inlet side.
- the sleeve 202 is slidably mounted in the medium diameter hole 200 b of the joint main body 200 and engages with the distal end portion of the flexible tube 300.
- the inlet side of the sleeve 202 extends to the large diameter hole 200 a of the joint body 200.
- the ring spring 204 is formed in an annular shape, expands and contracts due to elastic deformation, is fitted into the outer periphery of the valley portion 312 of the flexible tube 300 in a state where no load is applied, and is attached to the outer surface on the inlet side of the sleeve 202 in the expanded state.
- the push ring 210 is screwed to the inlet side of the joint body 200.
- An O-ring 206 is fitted between the push ring 210 and the joint body 200.
- a packing 208 is attached to the inner peripheral surface of the pusher wheel 210.
- the inner diameter of the push wheel 210 near the inner back end is smaller than the outer diameter of the ring spring 204 when the ring spring 204 is fitted on the outer periphery of the valley 312.
- Patent Document 2 discloses a flexible pipe joint as shown in FIGS. 9 (A) and 9 (B).
- This flexible pipe joint includes a joint body 250, a retainer member 252, a push wheel 254, and a waterproof packing 256.
- the joint body 250 has a tube insertion hole 270.
- the flexible tube 300 is inserted into the tube insertion hole 270.
- the retainer member 252 is disposed in the tube insertion hole 270.
- the retainer member 252 has a rear protrusion 252a.
- the rear protrusion 252 a is inserted into the trough 312 on the outer surface of the flexible tube 300.
- the push ring 254 is fixed in a state where the rear protrusion 252a of the retainer member 252 is inserted into the trough 312 on the outer surface of the flexible tube 300.
- the pusher wheel 254 slides in the axial direction within the tube insertion hole 270 of the joint body 250. Therefore, in the push wheel 254, the position where the rear protrusion 252a of the retainer member 252 does not fit into the valley 312 of the flexible tube 300, and the state where the rear protrusion 252a of the retainer member 252 fits into the valley 312 of the flexible tube 300. It is possible to displace between the positions holding the
- the waterproof packing 256 seals between the flexible tube 300 and the joint main body 250.
- the flexible pipe joint shown in FIGS. 9A and 9B is provided with a lock mechanism.
- This locking mechanism locks the push wheel 254 in the state described below.
- the state is a state in which the rear protrusion 252a is fitted into the valley 312.
- This locking mechanism is constituted by a stop ring member 258, a first groove 260, a second groove 262, and a third groove 264.
- the stop ring member 258 is a C-shaped member.
- the first groove 260 is formed in the joint body 250.
- the outer periphery of the stop ring member 258 engages with the first groove 260.
- the second groove 262 is also formed in the joint body 250.
- the outer periphery of the stop ring member 258 is also engaged with the second groove 262.
- the third groove 264 is formed on the outer peripheral surface of the push wheel 254.
- the inner periphery of the stop ring member 258 is engaged with the third groove 264.
- the stop ring member 258 slides from the first groove 260 to the second groove 262 according to the slide of the push wheel 254 while the inner peripheral portion is engaged with the third groove 264.
- the pusher wheel 254 When the outer peripheral portion of the stop ring member 258 is engaged with the first groove 260, the pusher wheel 254 is temporarily fixed to the joint body 250 in a half-inserted state. The position of the push wheel 254 at this time is a position where the rear protrusion 252a does not fit into the valley 312. When the outer peripheral portion of the stop ring member 258 engages with the second groove 262, the pusher wheel 254 is locked. At this time, the rear protrusion 252a is held in a state of being fitted into the valley 312. The pushing amount of the push wheel 254 is set to be substantially equal to the distance between the first groove 260 and the second groove 262 described above.
- the flexible pipe 300 when the push ring 254 is pushed in, the flexible pipe 300 can be connected while maintaining good sealing performance.
- the present invention has been made to solve such problems, and an object of the present invention is to provide a joint for flexible pipes which is less likely to cause fluid leakage.
- the flexible pipe joints 10 and 12 include joint bodies 20 and 21 and elastically deformable seal materials 22 and 23.
- the sealing materials 22 and 23 are accommodated in the joint main bodies 20 and 21.
- a flexible pipe 300 is inserted into the joint bodies 20 and 21.
- peaks 310 and valleys 312 extending along the entire circumference are alternately arranged in the tube axis direction.
- a tube insertion hole 60h is formed in the center. The flexible tube 300 is inserted into the tube insertion hole 60h.
- the sealing materials 22 and 23 seal between the outer peripheral surface of the flexible tube 300 inserted into the tube insertion hole 60 h and the inner peripheral surfaces of the joint main bodies 20 and 21.
- the joint main bodies 20 and 21 include insertion ports 40 and 41, a first housing portion 42, a seal material diameter-reducing guide portion 48, and a second housing portion 44.
- the flexible tube 300 is inserted into the insertion ports 40 and 41.
- the first accommodating portion 42 is formed in the back of the insertion ports 40 and 41 and communicates with the insertion ports 40 and 41.
- the seal material diameter-reducing guide portion 48 is formed on the side opposite to the insertion opening of the first housing portion 42 and narrows as the distance from the first housing portion 42 increases.
- the second storage portion 44 is formed at the back of the sealing material diameter-reducing guide portion 48 and stores the distal end portion of the flexible tube 300 and the sealing materials 22 and 23 on the outer periphery of the distal end portion of the flexible tube 300.
- the sealing materials 22 and 23 have trunk portions 60a and 61a and sealing action portions 60c, 61c and 61g.
- the trunk portions 60 a and 61 a are pushed into the second housing portion 44 by the distal end portion of the flexible pipe 300 housed in the joint main bodies 20 and 21.
- the sealing action portions 60c, 61c, 61g are drawn into the second housing portion 44 by pushing the body portions 60a, 61a into the back of the second housing portion 44.
- the sealing action portions 60 c, 61 c and 61 g are drawn into the second housing portion 44, the sealing action portions 60 c, 61 c and 61 g are engaged with the valley portion 312 of the flexible tube 300 by the sealing material diameter reducing guide portion 48 and drawn into the second housing portion 44. After that, the space between the inner periphery of the second housing portion 44 and the outer periphery of the flexible tube 300 is sealed.
- the sealing action portions 60 c, 61 c, 61 g seal between the inner periphery of the second housing portion 44 and the outer periphery of the flexible tube 300.
- the sealing action portions 60c, 61c, and 61g are engaged with the trough portion 312 of the flexible tube 300. Therefore, the sealing action portions 60c, 61c, and 61g are deeply engaged with the trough portion 312 of the flexible tube 300. Can be both compatible. Since both of these are possible, fluid leakage is less likely to occur.
- the above-described sealing action portion may have a plurality of annular portions 61c and 61g.
- the annular portions 61c and 61g are arranged so as to be aligned in the central axis direction of the sealing material diameter-reducing guide portion 48 and the first accommodating portion 42.
- the adjacent annular portions 61c and 61g may be connected to each other.
- the plurality of annular portions 61c and 61g included in the sealing action portion are connected to each other.
- the annular portions 61 c and 61 g are arranged so as to be aligned in the central axis direction of the sealing material diameter-reducing guide portion 48 and the first accommodating portion 42. Accordingly, when the trunk portions 60 a and 61 a are drawn into the back of the second housing portion 44, the annular portions 61 c and 61 g are sequentially drawn into the second housing portion 44.
- the annular portions 61c and 61g mesh with the plurality of valley portions 312 of the flexible tube 300, respectively. Since the plurality of annular portions 61c and 61g mesh with the plurality of valley portions 312 respectively, fluid leakage is less likely to occur.
- the sealing action part mentioned above may have one annular part 60c extended in the circumferential direction whole periphery of a flexible tube.
- the annular portion 60 c may mesh with the valley 312 of the flexible tube 300.
- the flexible pipe joint described above further includes a push ring 24.
- the push ring 24 is disposed on the side of the insertion ports 40 and 41 of the joint main bodies 20 and 21 with respect to the seal materials 22 and 23 and connected to the joint main bodies 20 and 21.
- the push ring 24 has a cylindrical portion 76a through which the flexible tube 300 passes.
- a push wheel taper surface 82b is provided at an end of the cylindrical portion 76a on the side disposed in the insertion ports 40 and 41.
- the presser wheel taper surface 82b extends toward the back of the insertion openings 40 and 41.
- the sealing materials 22 and 23 further have a retaining portion 60e.
- the retaining portion 60e is disposed at a position closer to the insertion ports 40 and 41 than the sealing action portions 60c, 61c, and 61g.
- An outer peripheral tapered surface 62 is provided on the outer periphery of the retaining portion 60e.
- the outer peripheral tapered surface 62 is narrowed toward the insertion ports 40 and 41.
- the outer peripheral taper surface 62 faces the presser wheel taper surface 82b.
- the flexible pipe joints 10 and 12 described above further include a snap ring 106 whose outer diameter changes due to elastic deformation.
- a snap ring receiving and holding groove 84 is provided on a surface of the cylindrical portion 76a that faces the inner periphery of the joint bodies 20 and 21.
- the inner periphery of the snap ring 106 is fitted in the snap ring housing and holding groove 84.
- a first snap ring engagement groove 90 and a second snap ring engagement groove 92 are provided on the inner periphery of the joint bodies 20 and 21.
- the second snap ring engagement groove 92 is provided at a position farther from the insertion ports 40 and 41 than the first snap ring engagement groove 90.
- the flexible pipe joints 10 and 12 further include the resin layer 110.
- the resin layer 110 is in contact with the intended insertion portion 77 in the cylindrical portion 76 a of the push wheel 24.
- the push wheel 24 has a flange portion 76b on the outer periphery of the cylindrical portion 76a in addition to the cylindrical portion 76a.
- the flange portion 76 b faces the joint main bodies 20 and 21 with the insertion-scheduled portion 77 interposed therebetween.
- the flexible pipe joints 10 and 12 further include a fireproof packing 104.
- the fireproof packing 104 is disposed on the outer periphery of the sealing materials 22 and 23 on the inner periphery of the first housing portion 42.
- FIG. 1 is a half-broken cross-sectional view showing the flexible pipe joint 10 according to the first embodiment of the present invention in a state before the sealing material 22 is pushed.
- FIG. 2 is a half-broken cross-sectional view of the flexible pipe joint 10 shown in a state where the sealing material 22 is being pushed.
- FIG. 3 is a half-broken cross-sectional view of the flexible pipe joint 10 shown in a state after the insertion of the flexible pipe 300 is completed.
- FIG. 4A is a cross-sectional view of the sealing member 22 with a half cutout.
- FIG. 4B is a rear view of the sealing material 22.
- FIG. 4C is a side view of the sealing material 22.
- the flexible pipe joint 10 includes a joint body 20, a seal material 22, a push ring 24, and the like.
- a receiving portion 30 is formed at one end of the joint body 20.
- a connecting male screw 32 is formed on the outer periphery of the other end of the joint body 20.
- the receiving portion 30 is a portion that receives the distal end portion of the metal flexible tube 300.
- the sealing material 22 is accommodated inside the opening 30 of the joint body 20.
- the pusher wheel 24 is connected to the joint body 20 in a half-inserted state that leaves a pushing allowance.
- the push ring 24 is disposed closer to the insertion port 40 described later than the seal material 22.
- the flexible tube 300 has crests 310 and troughs 312 extending in the circumferential direction on the outer peripheral portion thereof alternately in the tube axis direction, and the outer periphery thereof is made of a synthetic resin such as vinyl chloride. Covered with layer 314.
- an insertion port 40, a first housing portion 42, and a second housing portion 44 are provided in the receiving portion 30 of the joint body 20.
- the insertion port 40 is located on the most entrance side.
- the innermost side is the second accommodating portion 44.
- the flexible tube 300 is inserted into the insertion port 40.
- the first accommodating portion 42 is formed at the back of the insertion port 40.
- the first accommodating portion 42 is communicated with the insertion port 40.
- “communication” means that two spaces are made continuous through a passage.
- the “passage” here includes not only a tubular shape but also a simple hole.
- the second accommodating portion 44 accommodates the distal end portion of the flexible tube 300 and the sealing material 22 described above.
- a stopper portion 46 is provided at the inner back end of the second housing portion 44.
- the stopper portion 46 protrudes in the direction of the central axis of the joint body 20 as compared with the second housing portion 44.
- Between the first housing portion 42 and the second housing portion 44 there is a sealing material diameter reducing guide portion 48.
- the seal material diameter-reducing guide portion 48 is provided on the opposite side of the insertion port 40 of the first housing portion 42.
- the sealing material diameter-reducing guide portion 48 has a shape that narrows as the distance from the first accommodating portion 42 increases.
- the removal-reducing diameter guide portion 50 has a shape that narrows away from the insertion port 40.
- the sealing material 22 includes a body portion 60a, a tube end receiving portion 60b, a single annular portion 60c, a connecting portion 60d, and a retaining portion. Part 60e.
- a tube insertion hole 60 h is formed in the center of the sealing material 22.
- the flexible tube 300 is inserted into the tube insertion hole 60h.
- the trunk portion 60a, the pipe end receiving portion 60b, the single annular portion 60c, the connecting portion 60d, and the retaining portion 60e are integrated.
- drum 60a is cylindrical.
- the inner diameter of the trunk portion 60 a is substantially the same as the outer diameter of the peak portion 310 of the flexible tube 300.
- the tube end receiving portion 60b projects inwardly from the front end portion of the trunk portion 60a.
- the single annular portion 60 c meshes with the valley portion 312 of the flexible tube 300, the inner peripheral surface of the joint body 20 and the outer peripheral surface of the flexible tube 300 are sealed.
- the single annular portion 60c projects outward from the rear end portion of the trunk portion 60a.
- the connecting portion 60d is provided behind the single annular portion 60c, and connects the single annular portion 60c and the retaining portion 60e.
- the inner diameter of the connecting portion 60d is larger than the inner diameter of the trunk portion 60a.
- the retaining portion 60e is disposed at a position closer to the insertion port 40 than the rear end portion of the connecting portion 60d, that is, the single annular portion 60c.
- the inner diameter of the retaining portion 60 e is smaller than the inner diameter of the connecting portion 60 d and larger than the outer diameter of the peak portion 310 of the flexible pipe 300.
- the outer diameter of the retaining portion 60e is larger than the outer diameter of the connecting portion 60d.
- the barrel portion 60a, the single annular portion 60c, and the connecting portion 60d are made of rubber.
- rubbers used as these materials include NBR (Acrylonitrile-Butadiene rubber), SBR (Styrene-butadiene rubber), EPDM (ethylene propylene rubber) and the like.
- a reinforcing cored bar 60f such as a brass washer is embedded in the pipe end receiving part 60b.
- the material of the tube end receiving portion 60b may be formed of the same material as that of the body portion 60a, the single annular portion 60c, and the connecting portion 60d, or may be formed of a different material.
- the retaining part 60e is formed of a material harder than the body part 60a, the single annular part 60c, and the connecting part 60d. Examples of such materials include metal materials such as brass and hard resins.
- a part of the retaining portion 60e has an arc shape.
- the plurality of retaining portions 60e are connected to the rear end portion of the connecting portion 60d. These retaining portions 60e are arranged in a circumferential direction.
- the retaining portions 60e are separated from each other by a predetermined interval.
- An outer peripheral tapered surface 62 is provided on the outer periphery of the rear end of the retaining portion 60e. The outer peripheral tapered surface 62 is narrowed toward the insertion port 40, that is, toward the rear end.
- This sealing material 22 is arranged as shown in FIG. 1 before the flexible tube 300 is inserted (initial state). That is, in the initial state, the tube end receiving portion 60b and the trunk portion 60a are located in the second accommodating portion 44, the single annular portion 60c is located in the first accommodating portion 42, and the retaining portion 60e is the insertion port 40.
- the sealing material 22 is disposed so as to be located inside.
- a tip latch member 70 is disposed on the stopper portion 46 in the joint body 20.
- the tip latching member 70 is made of metal, hard resin, or the like.
- the tip latching member 70 has a C-shaped ring portion 72a that can be expanded and contracted in diameter, and a plurality of check pawls 72b that can be elastically deformed.
- the outer diameter portion of the ring portion 72 a is engaged in a circumferential groove 74 a provided on the outer diameter side of the stopper portion 46.
- the check pawl 72b protrudes into the second accommodating portion 44 from several locations on the inner diameter portion of the ring portion 72a.
- the pusher wheel 24 has a cylindrical portion 76a and a flange portion 76b.
- the cylindrical portion 76a and the flange portion 76b are integrated.
- the cylinder portion 76 a is disposed on the insertion port 40 side of the joint body 20 and is connected to the joint body 20. In the insertion port 40, the cylindrical portion 76a is movable in the axial direction.
- the flexible tube 300 can be inserted through the cylindrical portion 76a.
- the flange portion 76b is provided on the outer periphery of the rear end portion on the inlet side of the cylindrical portion 76a.
- the flange portion 76b faces the joint body 20 with a fitting portion 77 to be described later interposed therebetween.
- the outer diameter of the flange portion 76 b is larger than the hole diameter of the insertion port 40.
- the cylinder portion 76 a has a packing groove 78.
- the packing groove 78 is provided on the inner periphery of the rear end on the inlet side of the cylindrical portion 76a.
- the packing groove 78 is formed in the circumferential direction.
- a waterproof packing 80 is fitted in the packing groove 78.
- the waterproof packing 80 is made of EPDM or the like.
- the cross section of the waterproof packing 80 is T-shaped. Pin-shaped selectively permeable members 100 are embedded in several places in the circumferential direction of the waterproof packing 80. The selectively permeable member 100 transmits gas but does not transmit solid or liquid. Thereby, a gas leak test
- the selectively permeable member 100 is, for example, a sheet material including a continuous porous membrane or a porous body having continuous pores.
- the former continuous porous membrane is obtained by molding tetrafluoroethylene resin powder.
- the latter porous body can be obtained by molding from thermoplastic resin powder such as polyethylene, polypropylene, polymethyl acrylate and the like.
- the guide taper surface 82a is provided in the outer periphery of the edge by the side arrange
- the shape of the guide taper surface 82a is tapered.
- the gradient of the guide taper surface 82 a is substantially the same as that of the retaining diameter reducing guide portion 50 provided in the joint body 20.
- a push wheel taper surface 82b is provided on the inner periphery of the end of the cylindrical portion 76a on the side disposed in the insertion port 40.
- the presser wheel taper surface 82b has a flared shape that extends toward the back of the insertion port 40.
- a snap ring receiving and holding groove 84 is provided on the surface of the cylindrical portion 76 a that faces the inner periphery of the joint body 20.
- the snap ring housing and holding groove 84 is provided in the circumferential direction.
- a first snap ring engagement groove 90 and a second snap ring engagement groove 92 are provided on the inner periphery of the insertion port 40 of the joint body 20. Each of these extends in the circumferential direction.
- the second snap ring engagement groove 92 is provided at a position farther from the insertion port 40 than the first snap ring engagement groove 90.
- a groove taper surface 90 a is formed on the front groove wall in the first snap ring engagement groove 90. The groove taper surface 90 a is narrowed toward the first housing portion 42.
- a waterproof packing groove 86 is provided behind the snap ring housing and holding groove 84.
- the waterproof packing 102 is fitted in the waterproof packing groove 86.
- a fireproof packing groove 94 is provided on the inner periphery of the first housing portion 42 of the joint body 20 so as to surround the outer periphery of the sealing material 22.
- the fireproof packing groove 94 is fitted with a fireproof packing 104 made of rubber with thermally expandable graphite or the like.
- the flexible pipe joint 10 includes a first positioning and holding mechanism and a second positioning and holding mechanism.
- the first positioning and holding mechanism positions and holds the tip of the push wheel 24 at the initial position.
- FIG. 1 shows a state where the push wheel 24 is positioned and held at the initial position (half-inserted state).
- the initial position referred to here means after the retaining portion 60 e of the sealing material 22 before the flexible tube 300 is inserted.
- the second positioning and holding mechanism positions and holds the distal end portion of the push wheel 24 at a complete pushing position.
- FIG. 3 shows a state in which the tip end portion of the push wheel 24 is positioned and held at the complete pushing position.
- the complete pushing position referred to here is the retaining portion 60 e of the sealing material 22 after the sealing material 22 is pushed into the second housing portion 44 as the flexible pipe 300 is inserted. This means a position with a slight gap between them.
- the first positioning and holding mechanism includes the snap ring housing and holding groove 84 of the push ring 24, the snap ring 106, the first snap ring engaging groove 90 of the joint body 20, and the covering resin layer 110. And is composed of.
- the snap ring 106 has an edge portion, and its outer shape changes due to elastic deformation.
- the snap ring housing and retaining groove 84 is housed by fitting the inner periphery of the snap ring 106.
- the outer periphery of the snap ring 106 is engaged with the first snap ring engaging groove 90.
- the covering resin layer 110 is covered so as to be in close contact with a part of the outer surface of the press ring 24 in the half-inserted state exposed from the joint body 20 and a part of the outer surface of the receiving part 30.
- the reason why they are in close contact with each other is that the covering resin layer 110 contracts by being heated after being put on the push wheel 24. Thereby, the coating resin layer 110 is in contact with the insertion-scheduled portion 77.
- the part to be fitted 77 is exposed from the joint body 20 when the outer periphery of the snap ring 106 is fitted in the first snap ring engaging groove 90 in the cylindrical part 76 a of the push ring 24, and When the outer periphery is fitted in the second snap ring engaging groove 92, it is a portion arranged in the insertion port 40.
- the flange portion 76b faces the joint body 20 with the insertion-scheduled portion 77 interposed therebetween.
- the covering resin layer 110 is made of a heat-shrinkable plastic film having a thickness larger than the gap between the inner peripheral surface of the insertion port 40 and the cylindrical portion 76a of the push ring 24. Instead of a heat-shrinkable plastic film, it may be made of a heat-shrinkable plastic sheet or a tube made of such plastic.
- the material of the coating resin layer 110 is preferably a non-vinyl chloride material that is environmentally friendly, such as a polystyrene shrink film, a polyolefin shrink film, a polyester shrink film, or a polypropylene shrink film.
- the push wheel 24 is positioned and held at the initial position described above by the first positioning and holding mechanism. Thereby, even if an unexpected force acts on the pusher wheel 24 in the half-inserted state, it is difficult to be pushed into the joint body 20.
- the second positioning and holding mechanism is configured by the snap ring housing and holding groove 84 of the push ring 24, the snap ring 106, and the second snap ring engaging groove 92 of the joint body 20.
- the second snap ring engagement groove 92 is formed on the inner periphery of the receiving portion 30, and the second snap ring engagement groove 92 is inserted into the insertion opening 40 more than the first snap ring engagement groove 90. It is arranged side by side at a position far from the center. After the covering resin layer 110 is removed, when the push ring 24 in a half-inserted state is pushed into the insertion port 40, the snap ring 106 slides out from the groove tapered surface 90a of the first snap ring engaging groove 90.
- FIG. 3 shows a state in which the snap ring 106 is fitted in the second snap ring engaging groove 92.
- the stroke length S (see FIG. 2), which is the pushing allowance of the push ring 24, is substantially equal to the distance between the first snap ring engaging groove 90 and the second snap ring engaging groove 92. Is set.
- the first positioning and holding mechanism is inadvertently pushed into the half-inserted push ring 24. Is less likely to occur. That is, the occurrence of the above-described situation is prevented by the engaging action between the outer peripheral portion of the snap ring 106 and the first snap ring engaging groove 90 and the supporting action of the coating resin layer 110 provided in the insertion-scheduled portion 77.
- the flexible tube 300 When connecting the flexible tube 300, first, the flexible tube 300 (the synthetic resin layer 314 at the tip of the flexible tube 300 is peeled off in advance. As a result, the peak portion 310 of the flexible tube 300 is exposed. ) Is inserted into the insertion port 40 of the joint body 20 from the inlet side of the pusher wheel 24. The flexible tube 300 passes through the sealing material 22 in the order of the retaining portion 60e, the connecting portion 60d, the single annular portion 60c, and the trunk portion 60a. Thereafter, the distal end portion of the flexible tube 300 abuts on the tube end receiving portion 60 b of the sealing material 22.
- the single annular portion 60c of the sealing material 22 is formed so as to protrude outward, the single annular portion 60c does not become an obstacle when the flexible tube 300 is inserted.
- the distal end portion of the flexible tube 300 can be smoothly inserted into the sealing material 22.
- the trunk portion 60 a of the sealing material 22 is pushed into the back of the second housing portion 44.
- the single annular portion 60 c of the sealing material 22 moves to the narrow side of the sealing material diameter-reducing guide portion 48.
- the single annular portion 60c is pressed by the sealing material diameter reducing guide portion 48 and is reduced in diameter inwardly.
- the single annular portion 60 c engages with the valley portion 312 of the flexible tube 300 as soon as it passes through the seal material diameter reducing guide portion 48 and is drawn into the second accommodating portion 44. At that time, the single annular portion 60 c is in close contact with the inclined surface 312 a of the valley portion 312.
- the retaining portion 60 e of the sealing material 22 moves to the narrow side of the retaining diameter reducing guide portion 50.
- the retaining portion 60e is pulled into the first accommodating portion 42 while being pushed in the diameter reducing direction by the retaining diameter reducing guide portion 50.
- the seal material 22 reliably seals the space between the outer peripheral surface of the distal end portion of the flexible tube 300 and the inner peripheral surface of the second housing portion 44 of the joint body 20.
- the fluid flowing in the flexible tube 300 leaks from the distal end portion of the flexible tube 300 through the outer periphery of the distal end portion of the flexible tube 300 and the inner periphery of the second housing portion 44 of the joint body 20. Can be prevented. Even if the flexible tube 300 is slightly deformed, the effect is hardly lowered.
- a sealing function can also be expected between the distal end portion of the flexible tube 300 and the tube end receiving portion 60 b of the sealing material 22.
- the check claw 72b is elastically deformed while the inner diameter portion of the tube end receiving portion 60b of the sealing material 22 and the inner surface of the distal end portion of the flexible tube 300 are passing.
- this pipe end receiving part 60b passes the check claw 72b, the installer feels a response. Thereby, the installer can feel that the flexible tube 300 has been inserted to a predetermined depth.
- the flexible tube 300 can be prevented from swinging because the distal end portion of the flexible tube 300 engages with the check pawl 72 b of the distal end latching member 70 and the retaining portion 60 e enters the valley portion 312.
- 2 shows that the inner diameter portion of the tube end receiving portion 60b of the sealing material 22 and the inner surface of the distal end portion of the flexible tube 300 pass between the check pawl 72b and the inner peripheral surface of the second accommodating portion 44, and the flexible tube The situation where the tip of 300 hits the stopper portion 46 is shown.
- the coating resin layer 110 is removed from the pusher wheel 24.
- the pusher wheel 24 is completely pushed in by the pushing allowance (the stroke length S shown in FIG. 2).
- the snap ring 106 is moved along the groove taper surface 90a of the first snap ring engaging groove 90 of the joint body 20 in a state where the inner peripheral portion is fitted in the snap ring receiving and holding groove 84.
- the first snap ring engaging groove 90 slides out. Since it moves along the groove taper surface 90a, the snap ring 106 is elastically deformed to reduce its diameter.
- FIG. 3 shows a state where the pusher wheel 24 is completely pushed. The front end of the push ring 24 is held at a complete pushing position located on the rear side of the retaining portion 60e of the sealing material 22. At this time, as clearly shown in FIG. 3, the sealing state by the sealing material 22 is secured.
- the push ring taper surface 82b at the tip end of the push ring 24 comes close to and faces the outer peripheral tapered surface 62 of the retaining portion 60e of the sealing material 22.
- the outer peripheral tapered surface 62 slightly moves in the direction of the insertion port 40 and comes into contact with the pusher wheel tapered surface 82 b.
- the outer peripheral taper surface 62 receives a reaction force from the presser wheel taper surface 82b.
- the fitting portion 63 arranged on the back side of the outer peripheral tapered surface 62 as a part of the retaining portion 60e is fitted into the valley 312 of the flexible tube 300.
- the outer peripheral tapered surface 62 receives a reaction force from the presser wheel tapered surface 82b, and the fitting portion 63 transmits the reaction force to the trough 312 of the flexible tube 300, so that the flexible tube 300 is prevented from coming off.
- FIG. 5 is a half-broken cross-sectional view showing the flexible pipe joint according to the second embodiment of the present invention in a state before the sealing material 23 is pushed.
- FIG. 6 is a half-broken cross-sectional view of the joint for flexible pipe shown in a state in which the sealing material 23 is being pushed in.
- FIG. 7 is a half cutaway cross-sectional view of the joint for flexible pipe shown in a state after the insertion of the flexible pipe is completed.
- the flexible pipe joint 12 includes a joint body 21, a seal material 23, a push ring 24, and the like.
- a receiving portion 31 is formed at one end of the joint body 21.
- a connecting male screw 32 is formed on the outer periphery of the other end of the joint body 21.
- the receiving portion 31 is a portion that receives the distal end portion of the metal flexible tube 300.
- the seal material 23 is accommodated inside the receiving portion 31 of the joint body 21.
- the push ring 24 is inserted into a semi-inserted state in which a pushing allowance is left in the receiving portion 31.
- an insertion port 41, a first housing portion 42, and a second housing portion 44 are provided in the receiving portion 31 of the joint body 21.
- the sealing material 23 includes a body portion 61a, a pipe end receiving portion 60b, a first annular portion 61c, a second annular portion 61g, a connecting portion 60d, and a retaining portion 60e.
- the trunk portion 61a, the pipe end receiving portion 60b, the first annular portion 61c, the second annular portion 61g, the connecting portion 60d, and the retaining portion 60e are integrated.
- drum 61a is cylindrical.
- drum 61a is shorter than the trunk
- the first annular portion 61c and the second annular portion 61g are annular.
- the first annular portion 61c projects outward from the rear end portion of the trunk portion 61a.
- the second annular portion 61g is connected to the rear end portion of the first annular portion 61c.
- the interval between the first annular portion 61 c and the second annular portion 61 g is substantially the same as the interval between the valley portions 312 of the flexible tube 300.
- the first annular portion 61c and the second annular portion 61g play substantially the same role as the single annular portion 60c according to the first embodiment.
- the connecting portion 60d is provided behind the second annular portion 61g, and connects the second annular portion 61g and the retaining portion 60e.
- the barrel portion 61a, the first annular portion 61c, the second annular portion 61g, and the connecting portion 60d are made of rubber. Examples of the rubber used as these materials are the same as those in the first embodiment.
- This sealing material 23 is arranged as shown in FIG. 5 before the flexible tube 300 is inserted (initial state). That is, in the initial state, the tube end receiving portion 60b and the trunk portion 61a are located in the second accommodating portion 44, the first annular portion 61c and the second annular portion 61g are located in the first accommodating portion 42, and are retained. The sealing material 23 is disposed so that the portion 60e is located in the insertion port 41.
- the first positioning / holding mechanism is inadvertently pushed into the half-inserted push ring 24. Is less likely to occur.
- the flexible tube 300 When connecting the flexible tube 300, first, the flexible tube 300 is inserted into the insertion port 41 of the joint body 21 from the inlet side of the pusher wheel 24.
- the flexible tube 300 passes through the sealing material 23 in the order of the retaining portion 60e, the connecting portion 60d, the second annular portion 61g, the first annular portion 61c, and the trunk portion 60a. Thereafter, the distal end portion of the flexible tube 300 comes into contact with the tube end receiving portion 60 b of the sealing material 23.
- the first annular portion 61c and the second annular portion 61g are formed so as to project outward, so that they do not become an obstacle when the flexible tube 300 is inserted.
- the distal end portion of the flexible tube 300 can be smoothly inserted into the sealing material 23.
- the sealing material 23 When the flexible tube 300 is inserted until it comes into contact with the tube end receiving portion 60 b of the sealing material 23, the sealing material 23 is pushed into the second housing portion 44 by the flexible tube 300. Along with this pushing, the first annular portion 61 c of the sealing material 23 moves to the constricted side of the sealing material diameter-reducing guide portion 48. The first annular portion 61c is pressed by the sealing material diameter-reducing guide portion 48 and is reduced in diameter inwardly. The first annular portion 61 c engages with the valley portion 312 of the flexible tube 300 as soon as it passes through the seal material diameter reducing guide portion 48 and is drawn into the second accommodating portion 44.
- the second annular portion 61g moves toward the second accommodation portion 44 along the inner peripheral surface of the first accommodation portion 42. is doing.
- the first annular portion 61c engages with the valley portion 312 of the flexible tube 300
- the second annular portion 61g starts to engage with the valley portion 312 adjacent to the valley portion 312 with which the first annular portion 61c is engaged.
- the second annular portion 61g is pushed by the seal material diameter reducing guide portion 48. The diameter is reduced inwardly.
- the second annular portion 61g engages with the valley portion 312 of the flexible tube 300 as soon as it passes through the seal material diameter reducing guide portion 48 and is drawn into the second accommodating portion 44.
- the seal material 23 reliably seals the space between the outer peripheral surface of the distal end portion of the flexible pipe 300 and the inner peripheral surface of the second housing portion 44 of the joint body 21.
- the first annular portion 61 c is in close contact with the inclined surface 312 a of the valley portion 312.
- the second annular portion 61g is also in close contact with the inclined surface 312a of the valley portion 312.
- the retaining portion 60e of the sealing material 23 moves to the constricted side of the retaining diameter reducing guide portion 50.
- the retaining portion 60e moves to the first accommodating portion 42 while being pushed in the diameter reducing direction by the retaining diameter reducing guide portion 50.
- FIG. 7 shows a state where the pusher wheel 24 is completely pushed.
- the front end portion of the push ring 24 is held on the rear side of the retaining portion 60e of the sealing material 23. Therefore, the sealing state by the sealing material 23 is ensured.
- the push ring 24 is completely pushed, even if an external force in the direction of pulling out the flexible tube 300 is applied thereafter, the flexible tube 300 is reliably prevented from coming out.
- the principle is the same as in the first embodiment.
- the receiving portion 30 or the receiving portion 31 is formed at one end of the joint body 20 or the joint body 21, and the connecting male screw 32 is formed on the outer periphery of the other end of the joint body 20 or the joint body 21.
- the present invention can be applied to other structures, for example, symmetrical socket-type joints for flexible pipes having elbows at both ends, elbow-type joints for flexible pipes, and the like.
- the present invention is not limited to the case where the sealing material seals one or two of the valley portions 312 of the flexible tube 300. There may be three or more portions of the sealing material that are in close contact with the valley 312 of the flexible tube 300.
- the tube end receiving portion 60b and the reinforcing metal core 60f are not necessarily required. This is because the sealing material is drawn into the second housing portion of the joint body by the frictional force acting between the body portion 60a and the flexible tube 300.
- the tip latching member 70 is not necessary.
- the interval between the first annular portion 61 c and the second annular portion 61 g may be smaller than the interval between the valley portions 312 of the flexible tube 300. This is because the gap between the first annular portion 61c and the second annular portion 61g is widened by elastic deformation when engaging with the trough 312 of the flexible tube 300.
Abstract
Description
以下、本発明の第1の実施形態を図面に基づき説明する。図1は、本発明の第1の実施形態にかかるフレキシブル管用継手10を、シール材22押し込み前の状態で示す半欠截断面図である。図2は、シール材22押し込み途中の状態で示す同フレキシブル管用継手10の半欠截断面図である。図3は、フレキシブル管300の差込み完了後の状態で示す同フレキシブル管用継手10の半欠截断面図である。図4の(a)はシール材22の半欠截断面図である。図4の(b)はシール材22の背面図である。図4の(c)はシール材22の側面図である。 <First Embodiment>
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings. FIG. 1 is a half-broken cross-sectional view showing the flexible pipe joint 10 according to the first embodiment of the present invention in a state before the sealing
以下、本発明の第2の実施形態を図面に基づき説明する。図5は、本発明の第2の実施形態にかかるフレキシブル管用継手を、シール材23押し込み前の状態で示す半欠截断面図である。図6は、シール材23押し込み完了途中の状態で示す同フレキシブル管用継手の半欠截断面図である。図7は、フレキシブル管の差込み完了後の状態で示す同フレキシブル管用継手の半欠截断面図である。 <Second Embodiment>
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a half-broken cross-sectional view showing the flexible pipe joint according to the second embodiment of the present invention in a state before the sealing
20,21 継手本体
22,23 シール材
24,210,254 押輪
30,31 受口部
32 接続用雄ねじ
40,41 挿入口
42 第1収容部
44 第2収容部
46 ストッパー部
48 シール材縮径案内部
50 抜止縮径案内部
60a,61a 胴部
60b 管端受け部
60c 単一環状部
60d 連結部
60e 抜止部
60f 補強芯金
60h 管挿入孔
61c 第1環状部
61g 第2環状部
62 外周テーパ面
63 嵌入部分
70 先端掛止め部材
72a リング部
72b 逆止爪
74a 円周溝
76a 筒部
76b 鍔部
77 嵌入予定部
78 パッキン溝
80,102 防水パッキン
82a 案内テーパ面
82b 押輪テーパ面
84 スナップリング収容保持溝
86 防水パッキン溝
90 第1スナップリング係合溝
90a 溝テーパ面
92 第2スナップリング係合溝
94 耐火パッキン溝
100 選択透過性部材
104 耐火パッキン
106 スナップリング
110 被覆樹脂層
200,250 継手本体
200a 大径孔
200b 中径孔
200c 小径孔
202 スリーブ
204 リングスプリング
206 リング
208 パッキン
252 リテーナ部材
252a 後方突起
256 防水パッキン
258 ストップリング部材
260 第1溝
262 第2溝
264 第3溝
270 管挿入孔
300 フレキシブル管
310 山部
312 谷部
312a 斜面
314 合成樹脂層
S ストローク長さ 10, 12 Flexible pipe joint 20, 21 Joint body 22, 23 Sealing material 24, 210, 254 Press ring 30, 31 Receiving port 32 Connecting male screw 40, 41 Insert port 42 First housing portion 44 Second housing portion 46 Stopper portion 48 Sealing material diameter reducing guide part 50 Unclamping reduced diameter guiding part 60a, 61a Body part 60b Pipe end receiving part 60c Single annular part 60d Connection part 60e Retaining part 60f Reinforcement metal core 60h Pipe insertion hole 61c First annular part 61g Second Annular part 62 Outer taper surface 63 Insertion part 70 Tip latching member 72a Ring part 72b Non-return claw 74a Circumferential groove 76a Tube part 76b Ridge part 77 Insertion planned part 78 Packing groove 80, 102 Waterproof packing 82a Guide taper surface 82b Press ring taper Surface 84 Snap ring receiving / holding groove 86 Waterproof packing groove 90 First snap ring Joint groove 90a Groove taper surface 92 Second snap ring engagement groove 94 Fireproof packing groove 100 Selective permeability member 104 Fireproof packing 106 Snap ring 110 Covering resin layer 200, 250 Joint body 200a Large diameter hole 200b Medium diameter hole 200c Small diameter hole 202 Sleeve 204 Ring spring 206 Ring 208 Packing 252 Retainer member 252a Back projection 256 Waterproof packing 258 Stop ring member 260 First groove 262 Second groove 264 Third groove 270 Tube insertion hole 300 Flexible tube 310 Mountain portion 312 Valley portion 312a Slope 314 Synthesis Resin layer S Stroke length
Claims (7)
- 継手本体と、
前記継手本体内に収容される弾性変形可能なシール材とを備え、
フレキシブル管が前記継手本体内に挿入され、
前記フレキシブル管の外周部には、円周方向全周に延びる山部と谷部とが管軸方向へ交互に並設されており、
前記シール材には、中央に管挿入孔が形成されていて前記フレキシブル管が挿入され、
前記シール材は、前記管挿入孔に挿入されたフレキシブル管の外周面と前記継手本体の内周面との間でシールするフレキシブル管用継手であって、
前記継手本体が、
前記フレキシブル管が挿入される挿入口と、
前記挿入口の奥に形成され該挿入口に連通される第1収容部と、
前記第1収容部の前記挿入口とは反対側に形成され、前記第1収容部から離れるにつれ窄まるシール材縮径案内部と、
前記シール材縮径案内部の奥に形成され、前記フレキシブル管の先端部とこのフレキシブル管の先端部の外周のシール材とを収容する第2収容部とを有し、
前記シール材は、
前記継手本体内に収容されたフレキシブル管の先端部により前記第2収容部の奥へ押し込まれる胴部と、
前記胴部の前記第2収容部の奥への押し込みによって前記第2収容部の中へ引き込まれるシール作用部とを有し、
前記シール作用部が、前記第2収容部の中へ引き込まれる際、前記シール材縮径案内部により前記フレキシブル管の谷部にかみ合い、前記第2収容部の中へ引き込まれた後、前記第2収容部の内周と前記フレキシブル管の外周との間をシールすることを特徴とする、フレキシブル管用継手。 The fitting body;
An elastically deformable sealing material housed in the joint body,
A flexible tube is inserted into the joint body,
On the outer periphery of the flexible tube, crests and troughs extending in the entire circumference are arranged alternately in the tube axis direction,
In the sealing material, a tube insertion hole is formed in the center and the flexible tube is inserted,
The sealing material is a joint for flexible pipes that seals between the outer peripheral surface of the flexible pipe inserted into the pipe insertion hole and the inner peripheral surface of the joint body,
The joint body is
An insertion port into which the flexible tube is inserted;
A first housing portion formed at the back of the insertion port and communicated with the insertion port;
A seal material diameter-reducing guide portion that is formed on the opposite side of the first accommodation portion from the insertion port and that narrows as the distance from the first accommodation portion increases;
Formed at the back of the sealing material diameter-reducing guide portion, and having a second housing portion for housing a distal end portion of the flexible tube and a sealing material on an outer periphery of the distal end portion of the flexible tube,
The sealing material is
A body part that is pushed into the back of the second housing part by the distal end part of the flexible pipe housed in the joint body;
A sealing action part that is drawn into the second housing part by pushing the body part into the second housing part;
When the sealing action portion is drawn into the second housing portion, the sealing material diameter-reducing guide portion engages with the valley portion of the flexible pipe, and after being drawn into the second housing portion, The joint for flexible pipes characterized by sealing between the inner periphery of 2 accommodating parts, and the outer periphery of the said flexible pipe. - 前記シール作用部が、前記シール材縮径案内部および前記第1収容部の中心軸方向に並ぶよう配置される複数の環状部を有し、
隣接する前記環状部同士が互いに接続されていることを特徴とする、請求項1に記載のフレキシブル管用継手。 The sealing action part has a plurality of annular parts arranged so as to be aligned in the central axis direction of the sealing material diameter-reducing guide part and the first accommodating part,
The joint for flexible pipes according to claim 1, wherein the adjacent annular portions are connected to each other. - 前記シール作用部が、前記フレキシブル管の円周方向全周に延びる1つの環状部を有しており、
前記環状部が、前記フレキシブル管の谷部にかみ合うことを特徴とする、請求項1に記載のフレキシブル管用継手。 The sealing action portion has one annular portion extending around the entire circumference in the circumferential direction of the flexible tube;
The joint for flexible pipes according to claim 1, wherein said annular part meshes with a trough part of said flexible pipe. - 前記フレキシブル管用継手が、前記シール材よりも前記継手本体の挿入口側に配置されて前記継手本体に接続される押輪をさらに備え、
前記押輪が、前記フレキシブル管が貫通する筒部を有し、
前記筒部のうち前記挿入口の中に配置される側の端に、前記挿入口の奥に向かって広がる押輪テーパ面が設けられており、
前記シール材が、抜止部をさらに有し、
前記抜止部は、前記シール作用部よりも前記挿入口に近い位置に配置されており、
前記抜止部の外周に、前記挿入口の方向に向かって窄まる外周テーパ面が設けられており、
前記外周テーパ面が前記押輪テーパ面と対向しており、
前記フレキシブル管に対して前記継手本体から引き抜く方向に引抜力がかかったとき、前記押輪テーパ面に接触した前記外周テーパ面が前記押輪テーパ面から反力を受けると、前記抜止部のうち前記外周テーパ面の背面側に配置された部分が、前記フレキシブル管に前記反力を伝達して前記フレキシブル管の抜け出しを阻止することを特徴とする、請求項1に記載のフレキシブル管用継手。 The flexible pipe joint further includes a push ring that is disposed closer to the joint body insertion port than the seal material and connected to the joint body,
The press ring has a cylindrical portion through which the flexible pipe passes,
A push ring taper surface that extends toward the back of the insertion port is provided at the end of the cylindrical portion that is disposed in the insertion port.
The sealing material further has a retaining portion;
The retaining portion is disposed at a position closer to the insertion port than the sealing action portion,
The outer periphery of the retaining portion is provided with an outer peripheral tapered surface that narrows toward the insertion port,
The outer peripheral taper surface is opposed to the presser wheel taper surface;
When a pulling force is applied to the flexible pipe in a direction of pulling out from the joint body, the outer peripheral taper surface that is in contact with the presser wheel taper surface receives a reaction force from the presser wheel taper surface, and the outer periphery of the retaining portion is the outer periphery. The joint for a flexible pipe according to claim 1, wherein a portion disposed on the back side of the tapered surface transmits the reaction force to the flexible pipe to prevent the flexible pipe from coming out. - 前記フレキシブル管用継手が、弾性変形によって外径が変化するスナップリングをさらに備え、
前記筒部のうち前記継手本体の内周に対向する面にスナップリング収容保持溝が設けられており、
前記スナップリングの内周が、前記スナップリング収容保持溝に嵌め込まれており、
前記継手本体の内周に、
第1のスナップリング係合溝と、
第2のスナップリング係合溝とが設けられており、
前記第2のスナップリング係合溝が、前記第1のスナップリング係合溝よりも前記挿入口から遠い位置に設けられており、
前記スナップリングの外周が第1のスナップリング係合溝に嵌め込まれているとき前記押輪が前記挿入口の中に押し込まれると、前記スナップリングが、前記第1のスナップリング係合溝から滑り出し、前記第2のスナップリング係合溝に嵌まることを特徴とする、請求項4に記載のフレキシブル管用継手。 The flexible pipe joint further comprises a snap ring whose outer diameter changes due to elastic deformation,
A snap ring receiving and holding groove is provided on a surface of the cylindrical portion that faces the inner periphery of the joint body,
The inner periphery of the snap ring is fitted in the snap ring holding groove,
On the inner periphery of the joint body,
A first snap ring engagement groove;
A second snap ring engagement groove is provided,
The second snap ring engaging groove is provided at a position farther from the insertion port than the first snap ring engaging groove;
When the push ring is pushed into the insertion port when the outer periphery of the snap ring is fitted in the first snap ring engaging groove, the snap ring slides out of the first snap ring engaging groove, The flexible pipe joint according to claim 4, wherein the flexible pipe joint is fitted into the second snap ring engaging groove. - 前記フレキシブル管用継手が樹脂層をさらに備え、
前記樹脂層が、前記押輪の筒部のうち、前記スナップリングの外周が第1のスナップリング係合溝に嵌め込まれているときには前記継手本体から露出し、かつ、前記スナップリングの外周が第2のスナップリング係合溝に嵌め込まれているときには前記挿入口の中に配置される嵌入予定部に接しており、
前記押輪が、前記筒部に加え、前記筒部の外周に鍔部を有しており、
前記鍔部が、前記嵌入予定部を挟んで前記継手本体に対向していることを特徴とする、請求項5に記載のフレキシブル管用継手。 The flexible pipe joint further includes a resin layer,
The resin layer is exposed from the joint body when the outer periphery of the snap ring is fitted in the first snap ring engaging groove in the cylindrical portion of the push ring, and the outer periphery of the snap ring is the second. Is in contact with the insertion-scheduled portion disposed in the insertion port when fitted in the snap ring engagement groove of
In addition to the tube portion, the push ring has a flange on the outer periphery of the tube portion,
The joint for flexible pipes according to claim 5, wherein the flange portion is opposed to the joint main body with the insertion-scheduled portion interposed therebetween. - 前記フレキシブル管用継手が耐火パッキンをさらに備え、
前記耐火パッキンが、前記第1収容部の内周において前記シール材の外周に配置されることを特徴とする、請求項1に記載のフレキシブル管用継手。 The flexible pipe joint further comprises a fireproof packing;
The joint for flexible pipes according to claim 1, wherein the fireproof packing is disposed on an outer periphery of the sealing material on an inner periphery of the first housing portion.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020117003220A KR101267691B1 (en) | 2008-08-13 | 2009-08-10 | Joint for flexible tube |
CN2009801286499A CN102105732B (en) | 2008-08-13 | 2009-08-10 | Joint for flexible tube |
HK11108474.5A HK1154415A1 (en) | 2008-08-13 | 2011-08-12 | Joint for flexible tube |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2008-208418 | 2008-08-13 | ||
JP2008208418A JP5202178B2 (en) | 2008-08-13 | 2008-08-13 | Fitting for flexible pipe |
Publications (1)
Publication Number | Publication Date |
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WO2010018809A1 true WO2010018809A1 (en) | 2010-02-18 |
Family
ID=41668953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2009/064127 WO2010018809A1 (en) | 2008-08-13 | 2009-08-10 | Joint for flexible tube |
Country Status (6)
Country | Link |
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JP (1) | JP5202178B2 (en) |
KR (1) | KR101267691B1 (en) |
CN (3) | CN102563263B (en) |
HK (1) | HK1154415A1 (en) |
RU (1) | RU2451863C1 (en) |
WO (1) | WO2010018809A1 (en) |
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JP5463083B2 (en) * | 2009-06-09 | 2014-04-09 | 大阪瓦斯株式会社 | Fitting for flexible pipe |
WO2013132585A1 (en) * | 2012-03-06 | 2013-09-12 | Jfe継手株式会社 | Retainer, and joint for flexible pipe |
JP6267519B2 (en) * | 2014-01-16 | 2018-01-24 | 株式会社サンコー | Flexible pipe fittings |
JP2016159768A (en) * | 2015-03-02 | 2016-09-05 | 住友電装株式会社 | Electric wire protection member |
CN111102410B (en) * | 2018-10-26 | 2023-05-02 | 光阳产业股份有限公司 | Joint for flexible pipe and locking member for the joint |
KR102362653B1 (en) * | 2019-06-21 | 2022-02-14 | 샘찬에너지(주) | Method for assembling tube fitting |
Citations (3)
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JPH0393682U (en) * | 1990-01-11 | 1991-09-25 | ||
JPH07110087A (en) * | 1993-10-12 | 1995-04-25 | Hitachi Metals Ltd | Flexible pipe fitting |
JP2002048280A (en) * | 2000-08-04 | 2002-02-15 | Toyoda Gosei Co Ltd | Connecting structure of hose |
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JPH0632547Y2 (en) * | 1989-12-29 | 1994-08-24 | 東京瓦斯株式会社 | Flexible pipe fittings |
JPH06185680A (en) * | 1992-12-17 | 1994-07-08 | Tokyo Gas Co Ltd | Flexible pipe joint |
JPH07103383A (en) * | 1993-10-05 | 1995-04-18 | Hitachi Metals Ltd | Flexible pipe joint |
JP4749616B2 (en) * | 2001-07-19 | 2011-08-17 | 日立金属株式会社 | Plug-in fittings |
CN100373085C (en) * | 2001-10-04 | 2008-03-05 | 东京瓦斯株式会社 | Inserting pipe joint |
DE10310938A1 (en) * | 2003-03-13 | 2004-09-23 | Brugg Rohr Ag, Holding | Method of making a connection between a corrugated pipe and a connector |
CN1191442C (en) * | 2003-06-17 | 2005-03-02 | 张申正 | Quick connector for corrugated metal flexible tube |
-
2008
- 2008-08-13 JP JP2008208418A patent/JP5202178B2/en active Active
-
2009
- 2009-08-10 CN CN201210030629.1A patent/CN102563263B/en active Active
- 2009-08-10 WO PCT/JP2009/064127 patent/WO2010018809A1/en active Application Filing
- 2009-08-10 CN CN2012100306304A patent/CN102588692A/en active Pending
- 2009-08-10 KR KR1020117003220A patent/KR101267691B1/en active IP Right Grant
- 2009-08-10 CN CN2009801286499A patent/CN102105732B/en active Active
- 2009-08-10 RU RU2011109233/06A patent/RU2451863C1/en active
-
2011
- 2011-08-12 HK HK11108474.5A patent/HK1154415A1/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0393682U (en) * | 1990-01-11 | 1991-09-25 | ||
JPH07110087A (en) * | 1993-10-12 | 1995-04-25 | Hitachi Metals Ltd | Flexible pipe fitting |
JP2002048280A (en) * | 2000-08-04 | 2002-02-15 | Toyoda Gosei Co Ltd | Connecting structure of hose |
Also Published As
Publication number | Publication date |
---|---|
JP2010043706A (en) | 2010-02-25 |
CN102563263A (en) | 2012-07-11 |
HK1154415A1 (en) | 2012-04-20 |
JP5202178B2 (en) | 2013-06-05 |
CN102588692A (en) | 2012-07-18 |
CN102105732B (en) | 2012-10-17 |
KR101267691B1 (en) | 2013-05-24 |
RU2451863C1 (en) | 2012-05-27 |
CN102563263B (en) | 2014-12-10 |
CN102105732A (en) | 2011-06-22 |
KR20110028549A (en) | 2011-03-18 |
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