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1. 发明专利

JPH10252972A FIXING TOOL FOR ELECTRICALLY FUSED JOINT 失效
公开(公告)号：JPH10252972A
公开(公告)日：1998-09-22
申请号：JP7085897
申请日：1997-03-10
申请人： TOKYO GAS CO LTD , SANKO GAS SEIKI KK , KUBOTA KK
发明人： IIMURA SHOICHI , SAKASAI RYUJI , TERADA HAJIME , UENO TOSHIYUKI , HASEGAWA MICHIO , BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI , MIYATA TAKESHI
IPC分类号： F16L9/14 , F16L41/06 , F16L47/02
摘要： PROBLEM TO BE SOLVED: To provide a fixing tool for an electrically fused joint capable of performing the execution even when a branched short pipe projected from a main pipe is short. SOLUTION: A fixing tool 1 for an electrically fused joint is used for connecting a resin pipe 2 to a branched short resin pipe 4-1 to be projected from a circumferential surface of a cast iron pipe 6 through an electrically fused joint 3. The fixing tool 1 is provided with a fixing member 15 to be fixed to an outer side of an outer split sleeve 5 of the cast iron pipe 6, a clamping member 11 to be abutted on the outer side of a polyethylene pipe 2, and a connection member to connect the fixing member 15 to the clamping member 11. A branch port 5-4 having a flange 5-1 in the periphery thereof, where the branched short resin pipe 4-1 is projected, is provided on the outer split sleeve 5 of a main pipe. The fixing member 15 is formed half-split ring- shaped, and provided with a circumferential groove to be engaged with the flange 5-1.

2. 发明专利

JPH0814465A BRANCH STRUCTURE FOR RECLAIMING PIPE 失效
公开(公告)号：JPH0814465A
公开(公告)日：1996-01-16
申请号：JP15200494
申请日：1994-07-04
申请人： TOKYO GAS CO LTD , KUBOTA KK
发明人： IIMURA SHOICHI , SATAKE YUKINOBU , SAKAGUCHI MASAYUKI , BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI
IPC分类号： B29C65/34 , B29C65/78 , F16L1/00 , F16L41/02
摘要： PURPOSE:To enable a reclaiming pipe to branch having sufficient strength by induction-welding a seat part of a branch joint to the reclaiming pipe, and also clamping an external surface of a cast iron pipe with a clamp member. CONSTITUTION:A synthetic resin-made reclaiming pipe 14 is inserted in a folding condition into a cast iron pipe 12, after insertion, expanded by such as blowing hot air and closely attached to an internal wall in the cast iron pipe 12. A synthetic resin-made branch joint 16 is formed by providing an almost disk- shaped seat part 22 and by burying in its internal surface a magnetic alloy heater 28. This branch joint 16 is positioned in an external surface of the reclaiming pipe 14 and pressed thereto by using a pressing device 30, and the reclaiming pipe 14 is deformed so as to be along the seat part 22, so as to closely attach the seat part 22 to the reclaiming pipe 14. In this condition, a high frequency current is given to the magnetic alloy heater 28, to heat a connecting surface, between the seat part 22 and the reclaiming pipe 14, welded, and then an external surface of the cast iron pipe is clamped by a clamp member 20 so as to reinforce a connecting part.

3. 发明专利

JPH0814464A MOUNTING METHOD FOR BRANCH SADDLE 失效
公开(公告)号：JPH0814464A
公开(公告)日：1996-01-16
申请号：JP15200394
申请日：1994-07-04
申请人： TOKYO GAS CO LTD , KUBOTA KK
发明人： IIMURA SHOICHI , SATAKE YUKINOBU , SAKAGUCHI MASAYUKI , BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI
IPC分类号： F16L41/02 , B29C65/02 , B29C65/34 , B29C65/78 , B29L23/00 , F16L1/00 , F16L1/024 , F16L41/08 , F16L47/02
摘要： PURPOSE:To increase connecting strength by forming a radius of cuvature of a seat part larger than the radius of curvature of a pipe, pressing the seat part to the pipe deformed so as to be along the seat part, and connecting both the seat part and the pipe in a condition closely attached, when a branch saddle, including the seat part having relatively large rigidity, is mounted on the pipe. CONSTITUTION:In the case of mounting a branch saddle 16 on a reclaiming pipe 14 inserted to the inside of a gas use deteriorated cast iron pipe 12, the synthetic resin-made reclaiming pipe 14 is inserted in a fold condition into the cast iron pipe 12, after insertion, expanded by such as blowing hot air and closely attached to an internal wall of the cast iron pipe. Next, a branch saddle 16, including an almost disk-shaped seat part 18 having a radius of curvature R2 larger than a radius of curvature R1 of the reclaiming pipe 14, is positioned in an external surface of the reclaiming pipe 14, thereafter by pressing to the reclaiming pipe 14 by a pressing device 28, the reclaiming pipe 14 is deformed to closely attach the seat part 18 to the reclaiming pipe 14. In this condition, a high frequency current is given to a magnetic alloy heater 24 buried in the seat part 18, to heat a connecting surface, between the seat part 18 and the reclaiming pipe 14, fused.

4. 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.

5. 发明专利

JPH10196872A ELECTROFUSION DEVICE, FUSION METHOD AND FUSION INDUCTION DEVICE 失效
公开(公告)号：JPH10196872A
公开(公告)日：1998-07-31
申请号：JP293097
申请日：1997-01-10
申请人： TOKYO GAS CO LTD , KUBOTA KK
发明人： IIMURA SHOICHI , SAKASAI RYUJI , TERADA HAJIME , BAI HIDEKI , TAGO TAKU , WATABE HIROTSUGU , NAGAMATSU SHIGEYOSHI , HIOKI MASATO
IPC分类号： F16L41/08 , F16L47/02
摘要： PROBLEM TO BE SOLVED: To improve reliability and workability in joining a saddle on to pipe by fusion. SOLUTION: A seat 16a of a saddle 16 is passed through a first hole 12a formed in a cast iron pipe 12 against the wall of a recycled pipe 14 inserted in the cast iron pipe 12 by means of a support member mounted above the cast iron pipe 12. The coil part 46a of a work coil 46, having outside diameters smaller than the bore of the first hole 12a in the cast iron pipe 12, is brought into contact through the first hole 12a with the outer surface of the seat 16a of the saddle 16, and a work coil press 40 arranged on a support 24 is then moved downward to press the coil part 46a against the outer surface of the seat 16a. In that state, a heating element arranged in the inner surface of the seat 16a is joined on to the coil part 46a by fusion with the interval therebetween held constant.

6. 发明专利

JPH0968297A SADDLE HOLDING DEVICE 失效
公开(公告)号：JPH0968297A
公开(公告)日：1997-03-11
申请号：JP22307495
申请日：1995-08-31
申请人： TOKYO GAS CO LTD , OSAKA GAS CO LTD , KUBOTA KK
发明人： IIMURA SHOICHI , MORI YOJI , KYOMEN JUNSUKE , SAKAGUCHI MASAYUKI , BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI
IPC分类号： F16L13/06 , F16L1/024 , F16L3/00 , F16L47/02
摘要： PROBLEM TO BE SOLVED: To allow a fusion work without excavating the ground under a pipe, by holding a saddle and the pipe stationarily by a clamp having two legs extending from a pipe receiving part which is bent along the outer surface of the pipe, across a pipe shaft. SOLUTION: When a saddle holding device 10 is installed on the outer surface of a cast iron pipe, at first bolts 42 provided to legs 28 are loosened to retreat pressing means 46, and under such a condition, a clamp 24 is used to cover the outer surface of the cast iron pipe. After that, the bolts 24 are screwed in, and as a result, the inner surface of a pipe receiving part 26 is abutted to the outer surface of the cast iron pipe, as well as the pressing members 46 pushed out by the bolts 42 are abutted to the lower outer surface of the cast iron pipe, and thereby, the saddle holding device 10 is fixed on the outer surface of the cast iron pipe. And a second part 66 of a pressing part 52 is lowered by screwing a height regulating bolt 68, and the flange 84e of a pressing part 84 is abutted on the upper end surface of a saddle 16. And the inner surface of the saddle 16 is abutted to the outer surface of the pipe, by screwing in the height regulating bolt 68 further from the above condition.

7. 发明专利

JPH09239840A FUSION POWER SUPPLY APPARATUS 失效
公开(公告)号：JPH09239840A
公开(公告)日：1997-09-16
申请号：JP5718596
申请日：1996-03-14
申请人： KUBOTA KK
发明人： GOTO YUICHIRO , BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGENORI , HIOKI MASATO
IPC分类号： B29C65/00 , B29C65/34 , B29C65/36 , B29L23/00
摘要： PROBLEM TO BE SOLVED: To enable highly reliable fusion bonding even under environment of a cold district by always setting the internal temp. of a fusion power supply apparatus to a specified. (recommendation operation) temp. range. SOLUTION: A heater 36 is arranged in a fusion power supply apparatus 10 along a casing 40 and connected to thermostats 38a, 38b to control the supply of a current to the heater 36 by the thermostats. That is, the temp. in the fusion power supply apparatus 10 is predetermined temp. or lower, the supply of a current to a liquid crystal display part or a power supply part is stopped while the supply of a current to the heater 36 is started to raise the temp. in the fusion power supply apparatus 10. When the internal temp. reaches the specified temp. by the heater 36, the supply of a current to the heater 36 is stopped and power is supplied to the power supply part.

8. 发明专利

JPH06281080A JOINT FOR ELECTRIC FUSION 失效
公开(公告)号：JPH06281080A
公开(公告)日：1994-10-07
申请号：JP7340893
申请日：1993-03-31
申请人： KUBOTA KK
发明人： BAI HIDEKI , TAGO TAKU
IPC分类号： B29C65/30 , B29C65/32 , B29C65/34 , B29C65/36 , B29L31/26 , F16L47/02
摘要： PURPOSE:To make application to either of low-frequency power supply or high- frequency power supply for improvement of convenience by forming a wire rod which is formed near a connecting surface of a joint body with a conducting layer on the center line and a magnetic alloy layer formed at its surface. CONSTITUTION:This electric fusion joint 10 is provided with a roughly hollow cylindrical body 12 which is made of synthetic resin such as polyethylene, the hollow part of the body 12 serves as a socket 16 which receives a pipe 14 to be connected, and a wire rod 18 which is wound in a coil shape is embedded near the internal surface of the socket 16. The wire rod 18 is formed with a conducting layer 20 whose cross section is circular and which is made of a conducting body of copper-nickel alloy or the like and a magnetic alloy layer 22 which is formed at its surface and includes a magnetic alloy such as iron- nickel alloy. It is thus possible to heat the wire rod 18 by its combined resistance when low-frequency voltage is applied, and heat, the magnetic alloy layer 22 by concentrating electric current on the magnetic alloy layer 22 by a skin effect when high-frequency voltage is applied.

9. 发明专利

JPH09141668A MOLD FOR ELECTRIC FUSION BONDED JOINT 失效
公开(公告)号：JPH09141668A
公开(公告)日：1997-06-03
申请号：JP30722495
申请日：1995-11-27
申请人： KUBOTA KK
发明人： SAKAGUCHI MASAYUKI , BAI HIDEKI , TAGO TAKU
IPC分类号： F16L47/02 , B29C33/42 , B29C65/34 , B29D23/00 , B29L23/00
摘要： PROBLEM TO BE SOLVED: To make it possible to easily mount a heater and to prevent the deformation of the heater at the time of molding. SOLUTION: A heater 20 is mounted at the peripheral side of a mold in the state that two molds are separated from one another. the ends of the molds are butted, and hence a movable piece 30 is externally displaced. Then, the substantial peripheral length of the mold is increased larger than the inner peripheral length of the heater 20, the heater 20 is brought into close contact with the peripheral side of the mold and fixed.

10. 发明专利

JPH07205193A PRODUCTION OF PIPE FITTED WITH RECEIVING PORT 失效
公开(公告)号：JPH07205193A
公开(公告)日：1995-08-08
申请号：JP597594
申请日：1994-01-24
申请人： KUBOTA KK
发明人： KYOMEN JUNSUKE , SAKAGUCHI MASAYUKI , BAI HIDEKI , TAGO TAKU
IPC分类号： B29C33/04 , B29C45/14 , B29C45/17 , B29C45/73 , B29C57/00 , B29L23/00 , F16L21/00 , F16L47/02
摘要： PURPOSE:To enhance the bonding strength of a pipe main body and a receiving port by connecting an inner mold to which a pipe is set and an outer mold to form a cavity and sending hot air into the cavity to heat the end part of the pipe to the vicinity of the m.p. of the pipe and, after cutting off the hot air, injecting a molten molding material into the cavity to form the receiving port to the end part of the pipe. CONSTITUTION:A magnetic alloy heater 18 is attached to the heater mounting part 26 of an inner mold 18 and a pipe 12' of which the leading end part is preheated is attached to the pipe mounting part 22. At this time, the leading end part of the pipe 12' is expanded in its dameter by the taper 24 of the inner mold 18. An outer mold 20, that is, first molds 20a, 20b are closed to form a cavity and hot air is sent into the cavity from the hot air generator 57 connected to a hot air route 42. At this time, both of hot air blowoff and discharge ports 38,40 are opened. When the leading end part of the pipe 12' is heated to the vicinity of the m.p. thereof, the hot air blowoff and discharge ports 38,40 are closed and a molding material is injected into the ciavity from the injection molding machine connected to a gate. After the leading end part of the pipe 12' and the molding material are cooled, the outer mold 20 is opened to take out a pipe 2 fitted with a receiving port from the inner mold 18.

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