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21. 发明专利

JP2001141164A METHOD FOR JOINING RESIN PIPING MEMBER 失效
公开(公告)号：JP2001141164A
公开(公告)日：2001-05-25
申请号：JP32646399
申请日：1999-11-17
申请人： OSAKA GAS CO LTD , KUBOTA KK
发明人： NISHIMURA HIROYUKI , IWANAGA TETSUYA , KITAOKA TOSHIMICHI , MAEHANE HIROYUKI , HARADA TAKATOMO , OKUMURA HIROSHI
IPC分类号： F16L47/00 , F16L1/00 , F16L41/02 , F16L41/06 , F16L47/02
摘要： PROBLEM TO BE SOLVED: To provide a method for joining a resin piping member allowing efficient connection of other resin pipes or branch members to an existing resin pipe. SOLUTION: In the method for joining the resin piping member, before connecting the resin piping member 2 on the housing side to the resin piping member 1 on the insertion side, a correction area 9 of the resin piping member 1 on the insertion side is corrected by a plurality of correction jigs G, and the resin piping member 2 on the housing side is connected to the resin piping member 1 on the insertion side while successively removing the correction jigs G mounted on an end opening 1c side of the resin piping member 1 on the insertion side; and in the method for joining the resin piping member, before a saddle joint member is connected to an outer circumferential surface of the resin pipe, the correction area of the resin pipe is corrected using a plurality of correction jigs, and the saddle joint member is connected to the resin pipe after the correction jigs mounted on the saddle joint member fitting position are removed.

22. 发明专利

JPH04140593A ELECTRIC FUSION JOINT 失效
公开(公告)号：JPH04140593A
公开(公告)日：1992-05-14
申请号：JP26184790
申请日：1990-09-28
申请人： KUBOTA KK
发明人： OKUSAKA SHIGERU , GOTO YUICHIRO , HARADA TAKATOMO
IPC分类号： F16L47/02 , B29C65/34 , B32B1/08
摘要： PURPOSE:To perform electric fusion in all sockets with only one current application by winding a heating wire around one socket in double lines by folding, and then winding one end of the heating wire around the other socket and the other end around the remaining socket. CONSTITUTION:A heating wire 20 is bent onto the inner surface of a socket 16 and wound spirally in double lines to form a heating wire part 22. One end of the heating wire 20 is wound spirally in a single line around the inner surface of a socket 12 to form a heating wire part 24, and the other end is wound spirally in a single line around the inner surface of a socket 14 to form a heating wire part 26. Current applying ends 28, 30 are then formed at the end parts of the heating wire parts 24, 26. The heating wires formed at all sockets 12, 14, 16 are thereby made into one continuous heating wire, so that electric fusion in all sockets 12, 14, 16 is performed by applying currents from a pair of current applying ends 28, 30 only once, which results in improving construction performance.

23. 发明专利

JP2002276877A INNER CORE 失效
公开(公告)号：JP2002276877A
公开(公告)日：2002-09-25
申请号：JP2001077756
申请日：2001-03-19
申请人： KUBOTA KK
发明人： KAKEHASHI KOICHIRO , BAI HIDEKI , MURAKAMI KEISHI , HARADA TAKATOMO
IPC分类号： F16L33/22
摘要： PROBLEM TO BE SOLVED: To surely fix an inner core at a tube end with preventing misalignment of the inner core to a direction of falling off from a tube without being affected by variation of inner diameters of tubes and to easily detach the inner core from the tube end and to reduce manufacturing cost by utilizing external thread and internal thread. SOLUTION: A internal thread part 34 is formed on a tube wall of a short tube part 28 of the inner core 10 and is threadedly engaged with an external thread part 36. The external thread part 36 is threadedly engaged with the internal thread part 34 formed on the short tube part 28 and fastened under a condition that the short tube part 28 of the inner core 10 is inserted into a tube end of a tube 14 and a tip thereof is pressure-contacted on an inner surface 14b of the tube 14. Accordingly, the inner core 10 can be fixed at the tube end of the tube 14 by adjusting a threadedly engagement position of the external thread part 36 to the internal thread part 34 even if the tube 14 has variation of inner diameter.

24. 发明专利

JP2002228064A PUSH RING FOR PIPE JOINT, AND PIPE JOINT 失效
公开(公告)号：JP2002228064A
公开(公告)日：2002-08-14
申请号：JP2001024085
申请日：2001-01-31
申请人： KUBOTA KK
发明人： KAKEHASHI KOICHIRO , BAI HIDEKI , MURAKAMI KEISHI , HARADA TAKATOMO
IPC分类号： F16L21/04
摘要： PROBLEM TO BE SOLVED: To provide a push ring for a pipe joint, and the pipe joint in which an expansion part is formed and a lock ring is built in the push ring, and the expansion part and the lock ring can be integrated with each other, the cost of parts can be reduced, the pipe joint and a resin pipe can be easily joined with each other in a short time as scheduled without requiring any working skill. SOLUTION: In the pipe joint 10, the push ring 20 is tightened to a flange 32 of a flanged body 14 by a bolt 26 and a nut 28, and the push ring 20 is provided with a lock ring accommodation part 56 having first and second tapered surfaces 44 and 46 with an expansion part 42 for compressing a packing 22 fitted to an end of the body 14 and the lock ring 24 biting in the resin pipe 12 inserted from the end of the body which are built therein and for contracting the lock ring 24.

25. 发明专利

JP2000343606A PRODUCTION OF POLYOLEFIN-BASED LINER PIPE 失效
公开(公告)号：JP2000343606A
公开(公告)日：2000-12-12
申请号：JP15726299
申请日：1999-06-04
申请人： KUBOTA KK , OSAKA GAS CO LTD
发明人： YONEDA RYUICHI , ENOMOTO HIDEKAZU , HARADA TAKATOMO
IPC分类号： B29C48/32 , B29C53/08 , B29C63/34 , B29C47/20
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a polyolefin-based liner pipe in which partial insufficiency in strength of the liner pipe is solved and stable quality is obtained. SOLUTION: When a thick-wall part provided in a part of a pipe 12a is pushed into the inside in the radial direction by a forming plate 90, the pipe wall of the pipe 12a is deformed into a nearly U-shaped form and a nearly heart-shaped liner pipe 12 is obtained. At this time, since the thick-wall part is stretched in accordance with deformation of the pipe wall, wall thickness of the thick-wall part is made thin and wall thickness is made uniform in the whole periphery of the liner pipe 12.

26. 发明专利

JPH11320685A MANUFACTURE OF POLYOLEFIN LINER PIPE 失效
公开(公告)号：JPH11320685A
公开(公告)日：1999-11-24
申请号：JP13248298
申请日：1998-05-15
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , ENOMOTO HIDEKAZU , HARADA TAKATOMO
IPC分类号： B29C48/32 , B29C53/08 , B29C63/34 , B29K23/00 , B29L23/00 , B29C47/20
摘要： PROBLEM TO BE SOLVED: To easily continuously mold a polyolefin liner pipe to be inserted without resistance even in a bent pipeline. SOLUTION: The method for manufacturing a polyolefin liner pipe comprises the steps of extrusion molding a melted polyolefin resin in a tubular state, then once cooling the molded product 3 in a cooling tank 4, then reheating the molding 3 in a heating tank 5 at a softening point to a melting point, deforming it flatly at a tube section of the heated molded product 3, and cooling the flatly deformed molding 3 in a cooling tank 7.

27. 发明专利

JP2638112B2 失效
公开(公告)号：JP2638112B2
公开(公告)日：1997-08-06
申请号：JP21445988
申请日：1988-08-29
申请人： KUBOTA KK
发明人： SHIMOKAWA KYOKAZU , GOTO JUICHIRO , BAI HIDEKI , HARADA TAKATOMO
IPC分类号： B29C65/30 , B29C65/00 , B29C65/34 , B29L23/00 , F16L47/02

28. 发明专利

JP2002321281A LINER PIPE AND METHOD FOR MANUFACTURING THE SAME 失效
公开(公告)号：JP2002321281A
公开(公告)日：2002-11-05
申请号：JP2001127515
申请日：2001-04-25
申请人： KUBOTA KK , OSAKA GAS CO LTD
发明人： YONEDA RYUICHI , BAI HIDEKI , HARADA TAKATOMO , OKUMURA HIROSHI , MAEHANE HIROYUKI , YAMADA MASAHIRO
IPC分类号： F16L1/00 , B29C63/34 , B29L23/00
摘要： PROBLEM TO BE SOLVED: To restore a liner pipe so as to have an almost round cross-sectional shape when the liner pipe is restored within an existing pipe, to certainly join a saddle branch joint or the like to the liner pipe at the time of joining, and to restore the liner pipe so as to have a pipe wall uniform in wall thickness over the entire periphery of the liner pipe. SOLUTION: The liner pipe 10 is held in an up and down direction to be made flat so as to get into a folding habit and the flat pipe 10 applying the folding habit thereto is heat-treated at a predetermined temperature, in a folded state to make it possible to prevent restoring force ready to return the flat pipe 10 to the original liner pipe 10 having a circular cross section from acting on the flat pipe 10, when the flat pipe 10 is inserted into the existing pipe having a bent part to be heated. Since the push-in part 20a of the folded pipe 10 is not plastically deformed, the flat pipe can be restored so as to have the round cross-sectional shape by heating and pressing the pipe 10 from the interior thereof and the wall thickness of the push-in part 20a does not become thin.

29. 发明专利

JPH10185066A ELECTRIC FUSION COUPLING AND FUSION CONFIRMING METHOD 失效
公开(公告)号：JPH10185066A
公开(公告)日：1998-07-14
申请号：JP33796396
申请日：1996-12-18
申请人： TOKYO GAS CO LTD , KUBOTA KK
发明人： IIMURA SHOICHI , SAKASAI RYUJI , TERADA HAJIME , BAI HIDEKI , HARADA TAKATOMO , TAGO TAKU , WATABE HIROTSUGU , NAGAMATSU SHIGENORI , HIOKI MASATO
IPC分类号： G01K11/12 , B29C65/00 , B29C65/34 , B29C65/78 , B29L23/00 , B29L31/24 , F16L47/02
摘要： PROBLEM TO BE SOLVED: To decide the completion of fusion while preventing the discoloration of a temperature indicating member before the fusion. SOLUTION: On the outer surface of the seat 52 of a saddle 50, an electric fusion coupling, a recess 52a with a specific depth is formed, and an irreversible temperature indicating member 22 which is discolored inducing to the temperature to fuse the saddle correctly is provided in this recess 52a. Since the temperature indicating member 22 is approached to the fusion surface which is the inner surface of the seat 52, a temperature indicating member 22 in which the temperature of discoloration is set much higher can be provided.

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