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11. 发明专利

JP2002098279A CORRUGATED PIPE JOINT 失效
公开(公告)号：JP2002098279A
公开(公告)日：2002-04-05
申请号：JP2000284911
申请日：2000-09-20
申请人： SANKO GAS SEIKI KK , HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： FUJINAWA YASUSHI , AOKI HIDEYA , FUJIYOSHI MINORU , KASAI SHINYA , OKUBO ATSUSHI , MINAMI TOMOYUKI
IPC分类号： F16L33/00 , F16L33/28 , F16L37/12
摘要： PROBLEM TO BE SOLVED: To provide a corrugated pipe joint for facilitating the jointing work even in a small space without using a spanner and a wrench or the like. SOLUTION: This corrugated pipe joint 10 is provided with a case 11 formed of an inner case 12 and an outer case 15. A retainer 21 is arranged between the inner case 12 and the outer case 15. A connecting nut 32 of a joint body 31 is connected to the outer case 15. A spring receiver 51 to be displaced in the axial direction by the spring force of a coil spring 45 is housed in a body main body 35 of the joint body 31. Before connecting a corrugated pipe, a key 57 of the spring receiver 51 is engaged with a key groove 37 of the body main body 35 so as to lock the spring receiver 51 in the axial direction. After inserting the corrugated pipe, the case 11 and the joint box 31 are relatively turned so that the key 57 of the spring receiver 51 enters a key groove 17 of the outer case 15.

12. 发明专利

JP2001182879A CORRUGATED TUBE COUPLING 失效
公开(公告)号：JP2001182879A
公开(公告)日：2001-07-06
申请号：JP37259499
申请日：1999-12-28
申请人： TOKYO GAS CO LTD , HITACHI METALS LTD , SANKO GAS SEIKI KK
发明人： OKUBO ATSUSHI , MINAMI TOMOYUKI , FUJIYOSHI MINORU , UENO TOSHIYUKI , FUJINAWA YASUSHI
IPC分类号： F16L33/00 , F16L33/28
摘要： PROBLEM TO BE SOLVED: To provide a corrugated tube coupling capable of easily and rapidly carrying out connecting work with a simple structure. SOLUTION: A first groove 13a and a second groove 13b are formed on an inner hole A part 11a of a coupling body 10. The inner circumferential part of a stop ring 26 is fitted into a ring groove 25 of a retainer 20, and an outer peripheral part of the stop ring 26 is fitted into the first groove part 23a. At the time of connecting work, a corrugated tube T is inserted into the retainer 20. The collar 19 is taken out, the retainer 20 is inserted into the coupling body 10 as much as possible, and the outer peripheral part of the stop ring 26 is fitted to the second groove part 13b.

13. 发明专利

JP2000205474A EXPANSIBLE JOINT 失效
公开(公告)号：JP2000205474A
公开(公告)日：2000-07-25
申请号：JP490699
申请日：1999-01-12
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： OKUBO ATSUSHI , SHINO AKIHIRO , NOZAKI HIDEO
IPC分类号： F16L27/12
摘要： PROBLEM TO BE SOLVED: To enable an expansible joint to stably telescope for a long time without getting soil into a sliding portion and without a problem of corrosion, by closely contacting a tubular expansion cover, of which main component is rubber to be impervious to fluid, to the periphery of an expansible joint by at least on both ends. SOLUTION: Swivel joints 10, 10 are screwed and connected to each of ends between pipings A and B, which are objects to be connected. Oscillating pipes 17, 17 of the swivel joints 10, 10 are connected with an expansible joint 20. The expansible joint 20 is constituted by hermetically connecting to be capable of sliding a relatively longitudinal outer cylindrical tube 21 and an inner cylindrical tube 22 having smooth surfaces. One end of the outer cylindrical rube 21 is connected with the oscillating pipe 17 and the other end thereof is connected with a packing housing 30 of an expansive/contractive coupling portion. A protective cover has an inner diameter close to an outer diameter of the inner cylindrical tube 22 and is weaved of fibers made of chloroprene rubber. The inner diameter of the protective cover is stretched to hermetically cover the pipelines A, B. Both ends of the covers 60 is banded with the pipelines A, B by bands 61, 62 to hold water-tightness.

14. 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.

15. 发明专利

JP2002228063A STOPPER FOR PIPE JOINT, AND PIPE JOINT USING THE SAME 审中-公开
公开(公告)号：JP2002228063A
公开(公告)日：2002-08-14
申请号：JP2001253895
申请日：2001-08-24
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： TSUTSUMI CHIAKI , YONEDA SHINJI , OKUBO ATSUSHI , MINAMI TOMOYUKI , SATO FUMITAKA
IPC分类号： F16L19/08
摘要： PROBLEM TO BE SOLVED: To provide stoppers for pipe joint capable of sufficient extraction preventive force without peeling a resin-covered layer even in an outer surface resin covered steel pipe, and a pipe joint. SOLUTION: In stoppers 30 and 60 and pipe joints 1 and 52 using the stoppers which are accommodated in an inclined inner surface 24 of the joint having the diameter gradually smaller toward the insertion port side of a pipe, and locked to an outer face of a connection pipe 11 to prevent extraction of the pipe fitted in the joint, a large number of biting teeth 33 and 63 are protruded on an inner circumferential surface of a C-shaped ring-like member having a notch in a part of the circumference on the axial side with appropriate intervals in the circumferential and axial directions so that the stoppers are contracted by the wedge effect by the inclined inner surface 24 of the joint to prevent extraction of the connection pipe. The stoppers for pipe joint comprise an inner stopper member 61 having a large number of biting teeth with appropriate intervals in the circumferential and axial directions on the inner circumferential surface, and provided with notches in a part of the circumference direction and a holder member 62 covering the inner stopper member, abutted on the inclined inner surface of the joint, and having a notch in a part of the circumference.

16. 发明专利

JP2002054777A CORRUGATED PIPE JOINT 失效
公开(公告)号：JP2002054777A
公开(公告)日：2002-02-20
申请号：JP2000238196
申请日：2000-08-07
申请人： SANKO GAS SEIKI KK , HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： FUJINAWA YASUSHI , UENO TOSHIYUKI , FUJIYOSHI MINORU , KASAI SHINYA , OKUBO ATSUSHI , MINAMI TOMOYUKI
IPC分类号： F16L33/00 , F16L33/28 , F23K5/00
摘要： PROBLEM TO BE SOLVED: To provide a corrugated pipe joint allowing a worker to easily perform connecting works in a narrow space without using a spanner and a wrench. SOLUTION: This corrugated pipe joint 1 is provided with a easing 10 for inserting the end portion of a corrugated pipe T, a joint body 20 connected to the casing 10, and a retainer 30 having a belt member 33 and a rubber packing 35. The casing 10 and the joint body 20 are connected together by a stop ring 29. When an overhung portion 37y in the bottom end of a base portion 37 of the retainer 30 passes through a lower tapered portion 13y of the casing 10, a force strongly pushing the packing 35 against the outside of the corrugated pipe T is formed and, when an overhung portion 36x in the top end of a lever part 36 of the retainer 30 passes through the upper tapered portion 13x of the casing 10, a force pushing a claw 38 against a recess outside the corrugated pipe T is formed.

17. 发明专利

JP2001311492A SLIP-ON PIPE JOINT 失效
公开(公告)号：JP2001311492A
公开(公告)日：2001-11-09
申请号：JP2000131917
申请日：2000-05-01
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD , SANKO GAS SEIKI KK
发明人： FUJIYOSHI MINORU , OKUBO ATSUSHI , MINAMI TOMOYUKI , FUJINAWA YASUSHI
IPC分类号： B25B27/10 , F16L33/00 , F16L33/28 , F16L37/22
摘要： PROBLEM TO BE SOLVED: To provide a slip-on pipe joint of simple and reliable construction which compresses a seal member, provides a secure sealing and can prevent a slipping-off, just by insertion of a bellows type pipe into the joint main body. SOLUTION: In the slip-on pipe joint 16 which joints the bellows type pipe F having a concave and a convex 18, 20 in corrugated form around the periphery, the pipe joint comprising: a joint main body 26 wherein a pipe insertion aperture 24 is formed in step-wise to insert the bellows type pipe; an entrance main section 30 wherein a pipe insertion opening 28 is formed and a guide member 32 inscribed in the pipe insertion aperture is provided slidably in the longitudinal direction; a low rigid ring real member 36 which is installed in the pipe insertion aperture and keeps close contact with the periphery of the bellows type pipe F at the nose portion when pressed by the insertion of the guide member; a retainer member 40 which is installed in the pipe insertion aperture and engages with a recess of the bellows type pipe when the guide member is inserted; and an engagement member 52 which is mounted on the guide member and engages with the inner wall of the pipe insertion aperture when the guide member is inserted in the pipe insertion aperture. Because of these construction, just by insertion of the bellows type pipe into the joint main body, the seal member is compressed, provides a firm sealing, and is prevented from the slipping-off.

18. 发明专利

JP2001132881A BELL-AND-SPIGOT 失效
公开(公告)号：JP2001132881A
公开(公告)日：2001-05-18
申请号：JP31615599
申请日：1999-11-08
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD , SANKO GAS SEIKI KK
发明人： FUJIYOSHI MINORU , OKUBO ATSUSHI , MINAMI TOMOYUKI , FUJINAWA YASUSHI
IPC分类号： F16L33/00 , F16L33/28 , F16L37/12 , F16L37/22
摘要： PROBLEM TO BE SOLVED: To positively seal a bellows pipe and to prevent the bellows pipe from slipping of by compressing a packing and pressing a slip-off preventing member by a spring released from the compressed state only by inserting the bellows pipe in a joint body. SOLUTION: This bell-and-spigot pipe joint comprises, inside a joint body, a spring 30 sprung in an axial direction, a guide 20 for holding the spring 30 in the compressed state, and a packing 41 compressed by the elongation of the spring 30. The packing 41 is compressed by releasing the compression holding state of the spring 30 by a bellows pipe 40 inserted in the joint body, and further a pipe 40 is locked in the slip-off prevented state. The spring holding member 20 has an annular part 22 for receiving one end of the spring 30; a locking piece 21 extending to the inner part in the axial direction; a projecting part 23 locked to an inner surface recess 15 of the joint body; and an abutting part 24 abutting on the end part of the pipe 40. The spring holding member 20 is locked to the recessed groove 15 provided in the joint body, and the lock state is released being pressed by the end part of the bellows pipe 40. A soft packing or a lip packing is used as the packing 41.

19. 发明专利

JP2001108166A JOINT 失效
公开(公告)号：JP2001108166A
公开(公告)日：2001-04-20
申请号：JP28617899
申请日：1999-10-07
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： OKUBO ATSUSHI , MINAMI TOMOYUKI , SATO FUMITAKA , TSUTSUMI CHIAKI
IPC分类号： F16L19/08
摘要： PROBLEM TO BE SOLVED: To provide a joint by which leakage can be surely prevented by packing and a stop ring surely bites into a pipe, the outer surface of which is coated with hard resin to secure pull-out inhibit force. SOLUTION: This joint includes a joint main body in which a packing chamber is formed on the inner surface of the open end, an annular packing accommodated in the packing chamber, an annular retainer abutting on the axial outside surface of the packing, a push ring which is screw-engaged with the joint main body to press the packing through the retainer, and forms a first taper surface which is open opposite to the packing chamber and gradually decreased in inside diameter as it goes toward the opposite side to the opening, and a stop ring in which a second taper surface which is a ring-like body obtained by partially cutting the circumference, and inclined in the same direction as the first taper surface of the push ring to be brought into sliding contact with the first taper surface is formed on the outer periphery and a projected part which bites into the outer peripheral part of a pipe to be connected by reduction in diameter is formed on the inner periphery, and the projecting part is formed in plural places of the stop ring in the circumferential direction.

20. 发明专利

JPH1172185A RISER PIPE FOR FLUID PIPING 失效
公开(公告)号：JPH1172185A
公开(公告)日：1999-03-16
申请号：JP3303098
申请日：1998-02-16
申请人： HITACHI METALS LTD , TOKYO GAS CO LTD
发明人： ANAMIZU TAKASHI , MINAMI TOMOYUKI , OKUBO ATSUSHI , FUKUSHIMA SHUJI , NOZAKI HIDEO , FUJIYOSHI MINORU , MIYATA KAZUFUMI
IPC分类号： F16L19/02 , F16L9/06 , F16L9/14 , F16L33/00 , F16L33/28
摘要： PROBLEM TO BE SOLVED: To resolve various problems caused by corrosion by arranging a metal bellows pipe by making it rise from a plastic pipe in the underground without bringing it in contact with a soil. SOLUTION: A packing 22 is mounted on an outer face in a lower end part of a bellows pipe 40 to seal a section between the bellows pipe 40 and a plastic pipe 30. For this reason, a protection pipe 50 does not come in contact with the metallic bellows pipe 40, and insulation between the ground and the metallic bellows pipe 40 is achieved even if the protection pipe 50 is made of metal so that a problem of macro cell corrosion does not occur. Furthermore, a pipe made of vinyl chloride or a pipe made of fireproof mortar may be used. Moreover, since a section between the metallic bellows pipe 40 and the protection pipe 50 is sealed by a lip packing 21 and a section among the metallic bellows pipe 30, the plastic pipe 30, and the protection pipe 50 is sealed by a packing 20 provided in a wave ridge projection and recessed shape of the bellows pipe, the metallic bellows pipe is shut off from rainwater, and a problem of corrosion due to the contact of the thin walled metallic bellows pipe with water does not occur.

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