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21. 发明专利

JP2000146060A SEAL PACKING FOR CORRUGATED PIPE 失效
公开(公告)号：JP2000146060A
公开(公告)日：2000-05-26
申请号：JP32303198
申请日：1998-11-13
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： SATO FUMITAKA , OKUBO ATSUSHI , NOZAKI HIDEO
IPC分类号： F16L21/02 , F16L33/00 , F16L33/28
摘要： PROBLEM TO BE SOLVED: To maintain a stable seal condition over a long period between a corrugated pipe and a cylinder member, by providing an annular part, having a shoulder contact surface abutting to both side protruded shoulder surfaces in an external peripheral wave mountain recessed part of the corrugated pipe and an outer surface abutting to an internal peripheral surface of the cylinder member, and a connection part connecting these mating annular parts. SOLUTION: A seal packing 10 for a corrugated pipe, mounted between a cylinder member and a corrugated pipe, is provided with an annular part 14 having a shoulder contact surface 13 abutting to both shoulder parts in a wave mountain protruded part of the corrugated pipe, the these mating annular parts 14 are connected to each other in a connection part 15. When the seal packing 10 in a condition mounted in the corrugated pipe is inserted in a cylinder member internal peripheral surface, an outer surface of the seal packing 10 is compressed by abutting to the internal peripheral surface of the cylinder member. In this way, the packing 10, by elastic restoration force due to proper elastic deformation, gives compressive force to the internal peripheral surface of the cylinder member and both the shoulder parts in the wave mountain protruded part of the corrugated pipe, and stable seal performance is obtained by ensuring a life of the seal packing 10 over a long period.

22. 发明专利

JPH09303640A ELECTRICAL INSULATING JOINT FOR FLEXIBLE TUBE 失效
公开(公告)号：JPH09303640A
公开(公告)日：1997-11-28
申请号：JP12291196
申请日：1996-05-17
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： TAKEZAWA MASAAKI , ANAMIZU TAKASHI , MINAMI TOMOYUKI , SATO FUMITAKA
IPC分类号： F16L19/02 , F16L25/02 , F16L33/26
摘要： PROBLEM TO BE SOLVED: To impart electrical insulating properties to a joint for a flexible tube. SOLUTION: A joint comprises a metal joint body 1; a composite sleeve composed of a metal piece contacting at its one end with a projection coming into a valley of a flexible tube 8 and at its other end with a nut 3 which metal piece is integrally molded with a resin cylindrical body having a claw engaging with a groove 32 in the nut 3; and the metal nut 3 which engages with the claw of the composite sleeve and has the groove 32 for holding the projection about an annular recess 14, a press face 33 to contact with a metal contact face 24 of the composite sleeve and an external thread 31 helically engaging with an internal thread 15. An insulating ring 5 coated with electrical insulating material is interposed between the metal contact face 24 and the press face 33, the composite sleeve is coated with electrical insulating material to form an insulating composite sleeve 2, and a step face 12 in the joint body 1 is fitted with an electrical insulating gasket 4.

23. 发明专利

JPH0953778A JOINT FOR FLEXIBLE METAL PIPE 失效
公开(公告)号：JPH0953778A
公开(公告)日：1997-02-25
申请号：JP21057695
申请日：1995-08-18
申请人： SANKO GAS SEIKI KK , TOKYO GAS CO LTD , HITACHI METALS LTD
发明人： FUJIYOSHI MINORU , ANAMIZU TAKASHI , SATO FUMITAKA , OKI KATSUHIRO , UENO TOSHIYUKI
IPC分类号： F16L33/18 , F16L33/26
摘要： PROBLEM TO BE SOLVED: To provide a joint for a flexible metal pipe for which a safety measure against nailing is taken by reliably deteting leakage by a nailing error at inspection time. SOLUTION: In a joint which has at least a joint main body 1 and a nut 3 and connects a metallic flexible pipe 7 covered with a synthetic resin layer 71 to an outside surface of a metallic corrugated pipe 70, the joint for a metallic flexible pipe has packing 4 having a one-way passing function of allowing passing of gas to outside from inside the joint into this recessed groove but of checking passing into the joint from outside by forming an annular recessed groove 33 on a nut 3.

24. 发明专利

JPH0932985A COUPLING TO INTERCONNECT CORRUGATED PIPES 失效
公开(公告)号：JPH0932985A
公开(公告)日：1997-02-07
申请号：JP18133495
申请日：1995-07-18
申请人： HITACHI METALS LTD , SANKO GAS SEIKI KK , TOKYO GAS CO LTD
发明人： FUJIYOSHI MINORU , HASEGAWA MICHIO , SHIKAMATA SHINICHI , ANAMIZU TAKASHI , SAITOU MASAO , SATO FUMITAKA
IPC分类号： F16L33/00 , F16L33/28
摘要： PROBLEM TO BE SOLVED: To provide a coupling having a function to be connected with high sealing ability without a labor by inserting a corrugated pipe in a preassembled coupling and thereafter slightly further fastening a nut and besides detect it at a current time whether the corrugated pipe is correctly inserted. SOLUTION: A coupling to interconnect corrugated pipes comprises a coupling body 1; a sleeve 2 to hold the end of a corrugated pipe 4; and a nut 3 screwed in the coupling body 1. In which case, the coupling body 1 has a shoulder part 14 formed at the inside and having an airtight surface, an inner surface taper surface adjoining the shoulder part 14, and an annular recessed groove adjoining the taper surface. The sleeve 2 has a protrusion formed from an end part toward the internal part in a radial direction, and the protrusion enters the root of the flexible corrugated pipe 4 through resilient pivot movement. Further, the nut 3 has a claw, holding the outer surface of the protrusion of the sleeve 2 in a place corresponding to the annular recessed groove, a press surface pressed against the sleeve 2, and a fit-in groove in which the outer peripheral surface of the rear part of the sleeve 2 is fitted.

25. 发明专利

JPH08233177A SLEEVE FOR CORRUGATE PIPE CONNECTING JOINT 失效
公开(公告)号：JPH08233177A
公开(公告)日：1996-09-10
申请号：JP808096
申请日：1996-01-22
申请人： SANKO GAS SEIKI KK , HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： FUJIYOSHI MINORU , HASEGAWA MICHIO , SHIKAMATA SHINICHI , ANAMIZU TAKASHI , SAITOU MASAO , SATO FUMITAKA
IPC分类号： F16L33/00 , F16L33/28
摘要： PURPOSE: To easily engage a pipe with a sleeve, and prevent them from being simply separated by letting each projection which is so disposed that a slit is formed in front of the sleeve when the corrugate pipe is pushed in, and is widened so as to be opened, rise across the crests of the corrugate pipe, and subsequently letting aforesaid each projection which is contracted, go in the troughs of the corrugate pipe. CONSTITUTION: A sleeve 2 is integrally formed out of a ring shaped synthetic resin substrate, and of a metallic segment 26 via slits. When a corrugate pipe is pushed in the sleeve, since the front section of the sleeve is split by its slits, and a resinous body is elastic, each projection 23 is elastically widened so as to be opened around the ring section 21 of a rear section as a fulcrum along the troughs of the corrugate pipe, and each projection 23 is thereby opened, it rises across the crests of the corrugate pipe, and subsequently each projection 23 goes in the first trough while being contracted so as to be locked therein. Thus as mentioned above, the insertion of the corrugate pipe into a joint main body allows each projection to be easily locked in the trough section of the corrugate pipe, and subsequently allows the corrugate pipe to be hardly slipped out, so that correct connection is thereby made at all times.

26. 发明专利

JPH07103379A FLEXIBLE PIPE JOINT 失效
公开(公告)号：JPH07103379A
公开(公告)日：1995-04-18
申请号：JP24664093
申请日：1993-10-01
申请人： TOKYO GAS CO LTD , HITACHI METALS LTD , SANKO GAS SEIKI KK
发明人： FUJIYOSHI MINORU , UENO TOSHIYUKI , SHIKAMATA SHINICHI , ANAMIZU TAKASHI , SAITO MORIO , SATO FUMITAKA
IPC分类号： F16L33/00 , F16L33/28
摘要： PURPOSE:To improve connecting workability by inserting a flexible pipe into a joint main body so that the cylindrical portion of a packing is compressed via a stopper and the axially right angle portion of the packing is compressed at the end of the flexible pipe locked to the stopper when a nut is fastened. CONSTITUTION:During connection, a joint main body 10 is partially threaded to a nut 20 in such a state that a seal packing 30 and a stopper 40 are mounted to a pipe socket 14 in the joint main body 10. The flexible pipe 50 is put through the rear end of the nut 20, inserted into the packing 30 while pushing and enlarging the inside face of the stopper 40 at the end 51 of the pipe 50 and put in contact with the axially right angle portion 32 of the packing. At this time, the stopper 40 is fitted and locked to the outer periphery of the pipe 50 by the elastic resilience of the packing 30 to allow the stopping of the pipe 50. When the nut 20 is turned and fastened to the fitting main body 10 in such a state, the stopper 40 is shrinked at the tapered inside face 22 of the nut 20 and the cylindrical portion of the packing 30 is compressed to seal the outer periphery of the pipe 50.

27. 发明专利

JPH01203791A INSULATING PIPE JOINT FOR CONNECTING CORRUGATED PIPE 失效
公开(公告)号：JPH01203791A
公开(公告)日：1989-08-16
申请号：JP2723088
申请日：1988-02-08
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： AKIYAMA SABURO , TOKU TAKASHI , TSUTSUMI CHIAKI , TAKADA HIDEMASA , SHIBAYAMA KOKICHI , SATO FUMITAKA
IPC分类号： F16L25/02
摘要： PURPOSE:To contrive to provide electric insulation properties by forming the title joint from a sleeve engaged with a corrugated pipe, box nut, and a joint body and installing each electric insulating member onto the outer surface and rear part side wall of the sleeve and installing a packing. CONSTITUTION:A joint for a corrugated pipe 4 consists of a sleeve 3 installed onto the outer surface of the corrugated pipe 4, box nut 2 having a female screw for the engagement with the sleeve 3, and a joint body 1 having a male screw which is screwed with the box nut 2 and the female screw, hole 17 and a communication hole 16. Each electric insulating member 6 is installed onto the outer surface of the sleeve 3 and a rear part side wall 39, and a packing 5 which possesses the electric insulating performance and sealing performance is installed onto the pipe receiving wall part 18 of the joint body 1. Therefore, connection can be carried out easily in the state where the corrugated pipe is cut, and electric insulation performance is provided, and the trouble of erosion due to the electric conduction such as microcell erosion can be prevented.

28. 发明专利

JP2003176891A COUPLING FOR METAL FLEXIBLE PIPE 审中-公开
公开(公告)号：JP2003176891A
公开(公告)日：2003-06-27
申请号：JP2002363141
申请日：2002-12-13
申请人： SANKO GAS SEIKI KK , TOKYO GAS CO LTD , HITACHI METALS LTD
发明人： FUJIYOSHI MINORU , ANAMIZU TAKASHI , SATO FUMITAKA , OKI KATSUHIRO , UENO TOSHIYUKI
IPC分类号： F16L33/26
摘要： PROBLEM TO BE SOLVED: To provide a coupling for a metal flexible pipe with a safety measure capable of certainly detecting a leakage upon inspection of the leakage by positively discharging the leakage caused by an error of nail hitting to the outside. SOLUTION: The coupling for a metal flexible pipe having a coupling body 1 and a nut 3 is connected to an end of the metal flexible pipe 7 in which a synthetic resin layer 71 is covered on an outer surface of the metal corrugated pipe 70 for flowing a gas. A selectively permeating member 5, through which a gas is passed but a liquid is not passed, for permeating the gas leaked from the metal corrugated pipe and arriving at the coupling body and/or the nut so as to discharge it to the outside is provided on the coupling body and/or the nut. COPYRIGHT: (C)2003,JPO

29. 发明专利

JP2000146061A RISER PIPE JOINT FOR CONNECTING GAS METER 失效
公开(公告)号：JP2000146061A
公开(公告)日：2000-05-26
申请号：JP1058399
申请日：1999-01-19
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： OKUBO ATSUSHI , SATO FUMITAKA , NOZAKI HIDEO , FUJIYOSHI MINORU
IPC分类号： F16L33/00 , F16L19/00 , F16L33/28 , F16L47/00 , F16L57/00
摘要： PROBLEM TO BE SOLVED: To obtain fire resisting performance while solving a problem of corrosion, by providing a resin coating layer in an outer surface of a joint main unit, providing an end part of the resin coating layer in a cylinder unit fusion- connected to a thermoplastic resin pipe, and covering the resin coating layer in an on-ground rise up part of a joint main unit with a protecting cover having weather resistance. SOLUTION: A joint main unit 10 of a riser pipe joint for connecting a gas meter is provided with a connecting tapered internal thread 11 in one end and formed with a resin coating layer 12 in an outer surface. A cylindrical part 13 is provided in this resin coating layer 12, and a cylinder unit 14 is provided to protrude from an end part of the joint main unit 10 in the other end side. This cylinder unit 14 is connected to a buried resin pipe of supply source by a resin-made electric fused joint. An outer surface resin coated steel pipe 19 is connected to the tapered internal thread 11, and an end part of this steel pipe 19 is arranged in the gas meter. A ground exposed part of the joint main unit 10 is covered with a protecting cover 17. In this way, the steel pipe 19, even when it is heated in a fire, is cooled by a buried part of the joint main unit 10, to hold safety in a fire.

30. 发明专利

JPH07119877A COUPLING FOR FLEXIBLE TUBE 失效
公开(公告)号：JPH07119877A
公开(公告)日：1995-05-12
申请号：JP27080693
申请日：1993-10-28
申请人： TOKYO GAS CO LTD , HITACHI METALS LTD , SANKO GAS SEIKI KK
发明人： FUJIYOSHI MINORU , UENO TOSHIYUKI , SHIKAMATA SHINICHI , ANAMIZU TAKASHI , SAITOU MASAO , SATO FUMITAKA
IPC分类号： F16L33/00 , F16L33/28
摘要： PURPOSE:To reduce the fastening force and the fastening time in the connecting work, and to confirm that a flexible tube is pressed in normally, by pressure contacting about one crest amount at the front end of the flexible tube. CONSTITUTION:A coupling for flexible tube consists of a coupling main body 1, a nut 2, a retainer 3, a gasket 4, an O ring 5, and a watertight packing 6. On the other hand, to the front end of the flexible tube to be connected, A cutting part 7a, the first crest 7b to be squashed, the first valley 7c, the second crest 7d, the second valley 7e... are formed from the front end, and its outer surface is covered by a protective membrane 8 made of a synthetic resin. The retainer is inserted while remaining one crest at the front end of the flexible tube, and as a result, the one crest at the front end is pressure contacted and squashed to the bottom wall, through the gasket 4 when explained in detail. Consequently, the friction and the pressing torque between members in a fastening work are reduced, and its working time is also reduced.

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