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11. 发明专利

JPH06281079A WORK COIL FOR HIGH-FREQUENCY POWER SUPPLY 失效
公开(公告)号：JPH06281079A
公开(公告)日：1994-10-07
申请号：JP7340793
申请日：1993-03-31
申请人： KUBOTA KK
发明人： BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI , NISHIKAWA KOZO , KANDA MASAYUKI
IPC分类号： B29C65/36 , B29L31/24 , F16L47/02
摘要： PURPOSE:To improve attaching/detaching performance, reduce leakage flux, and improve heating efficiency, by providing a work coil which generates high- frequency current in a magnetic alloy heater by induction with a coil mat which is curved in a circumferential direction. CONSTITUTION:This work coil 10 for high-frequency power supply, which is used for fusion of a plastic pipe or the like, contains a coil mat 12 of roughly C-shape. The coil mat 12 is provided with a core 14 made of heat resistant resin such as polycarbonate, a loop which consists of an inducting body 16 is formed on its external surface, and a ferritic layer 22 and a casing 24 made of aluminum or the like are formed at its outside. In connecting pipes 38, 38 with each other, the respective pipes 38 are inserted in the socket of a joint 30 formed with a magnetic alloy heater 36 on its internal circumferential surface side, and the inducing body 16 is energized through terminals 30a, 30b by a high-frequency power supply 34, so that the heater 36 is inductively-heated to fusion-connect both the coupler and the pipes 30, 38 with each other at their connected surface.

12. 发明专利

JPH08247370A PLASTIC PIPE AND PLASTIC PIPE JOINT 失效
公开(公告)号：JPH08247370A
公开(公告)日：1996-09-27
申请号：JP5086795
申请日：1995-03-10
申请人： OSAKA GAS CO LTD , KUBOTA KK
发明人： NISHIMURA HIROYUKI , ISHIKAWA TETSUO , KYOMEN JUNSUKE , SAKAGUCHI MASAYUKI , BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGENORI , GOTO YUICHIRO
IPC分类号： F16L47/02 , B29C65/34 , B29C65/36 , B29L9/00 , B29L23/00 , B29L31/24
摘要： PURPOSE: To eliminate the scrape process, and improve workability at the time when plastic pipes are joined, in the plastic pipes, the junctions of which are made up of at least two layers, by making the fluidity of the surface layer greater than that of the inside layer. CONSTITUTION: When plastic pipes 10 are joined, the tips of the pipes 10 are inserted into sockets 18 of a joint 16, the joint 16 and the pipes 10 are fixed by use of a fixing tool, and a work coil 26 is arranged around the joint 16. In this state, when high frequency power is given from a high frequency power supply 28 to the work coil 26, high frequency current is given to a magnetic alloy heater 22 of the joint 16 by electromagnetic induction, and the heater 22 suddenly release heat by the skin effect to melt the outside surface of the pipes 10 and the inside surface of the joint 16 at the temperatures close to Curie temperature. At this time, the surface layer 14 of great fluidity flows together with oxide films and dirty layers, and a new, molten plastic of the inside layer 12 appears on the joining surfaces. Thus, the molten plastic of the inside layer 12 and the molten plastic of a joint body 20 are mixed and fused with each other.

13. 发明专利

JPH07269774A WORK COIL FOR INDUCTION FUSION 失效
公开(公告)号：JPH07269774A
公开(公告)日：1995-10-20
申请号：JP5845594
申请日：1994-03-29
申请人： KUBOTA KK
发明人： SAKAGUCHI MASAYUKI , BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI , KANDA MASAYUKI
IPC分类号： F16L47/02 , B29C65/36 , H05B6/10
摘要： PURPOSE:To improve handleability as well as to make an efficient fusion achievable by installing a condenser to be connected in series to a coil with capacity congruous to self-inductance of this coil in the case where a joint is fused to a pipe by imparting high-frequency power to the joint in which a magnetic alloy heater is embedded. CONSTITUTION:In time of pipe joining, a pipe 18 is inserted into a socket 12 of another pipe 16, and a coil spacer 20 is installed on a peripheral surface of this socket 12. In addition, one end of a coil 22 is engaged with one end of a groove 30 by an engager 32a and then the coil 22 is wound along the groove 30 as rotating this coil spacer 20, and the other end of the coil 22 is engaged with the other end of the groove 30 by another engager 32b. In succession, a first connector 48 is installed in one end of the coil 22 like this and the second connector 52 in the other end, respectively, via a condenser 50 with capacity congruous to self-inductance of the coil 22, whereby a joined plane is fused together by heating a magnetic alloy heater 14 suddenly after imparting high-frequency power to these connectors by a high-frequency power supply unit 56.

14. 发明专利

JPH06285995A METHOD AND APPARATUS FOR ELECTRICALLY FUSION-BONDING TO CONNECT 失效
公开(公告)号：JPH06285995A
公开(公告)日：1994-10-11
申请号：JP7445093
申请日：1993-03-31
申请人： KUBOTA KK
发明人： BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI , NISHIKAWA KOZO , KANDA MASAYUKI , GOTO YUICHIRO
IPC分类号： B29C65/36 , B29L23/00 , B29L31/24 , B29L31/26 , F16L47/02
摘要： PURPOSE:To automatically set an output and a conducting time and to improve reliability of operability and connecting operation by stopping conduction of a work coil from a high frequency power source after a prescribed time is elapsed from a time when a temperature of a magnetic alloy heater reaches a Curie point. CONSTITUTION:A high frequency output is applied from a high frequency power source 14 to a magnetic alloy heater 64 provided at a connecting part through a work coil 12. In this case, a prescribed time responsive to a type of a joint 66 is previously set at each joint. The source 14 is connected to the coil 12, and the type of the joint 66 is recognized. Then, conduction of the coil 12 from the source 14 is started. Whether a temperature of the heater 64 reaches a Curie point or not is judged, and after a prescribed time elapses after the temperature of the heater 64 reaches the point, conduction of the coil 12 from the source 14 is stopped.

15. 发明专利

JPH06284736A POWER-SUPPLY FOR INDUCTION WELDING 失效
公开(公告)号：JPH06284736A
公开(公告)日：1994-10-07
申请号：JP7365693
申请日：1993-03-31
申请人： KUBOTA KK
发明人： BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI , NISHIKAWA KOZO , KANDA MASAYUKI
IPC分类号： B29C65/32 , H02M7/48
摘要： PURPOSE:To obtain a stable and sure control characteristic which corresponds to a change in the circuit constant of a work coil or the like due to a temperature change, a load change or the like by a method wherein, while the driving current of an inverter is being controlled, the carrier frequency of the driving signal of the inverter is changed so as to follow a change in a resonant frequency including the work coil. CONSTITUTION:The high-frequency output of a full-wave inverter 14 is supplied to a resonant circuit 16 via a transformer 16. The resonant circuit 18 includes a resonant capacitor 21 and a work coil 22, and the work coil 22 guides a high-frequency current to a heater 24 for welding. The current of the resonant circuit 18 is detected by a CT 26, it is input to a microcomputer 30 via a current/voltage conversion circuit 28, and it is fed back to a PLL 32. The output of the PLL 32 is given to one input of an AND gate 40 as an inverter carrier signal, a PWM control signal from the microcomputer 30 is given to the other input of the AND gate 40, and the output of the AND gate 40 is given to an inverter drive circuit 12.

16. 发明专利

JP2914600B2 失效
公开(公告)号：JP2914600B2
公开(公告)日：1999-07-05
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

17. 发明专利

JP2914599B2 失效
公开(公告)号：JP2914599B2
公开(公告)日：1999-07-05
申请号：JP7340793
申请日：1993-03-31
申请人： KUBOTA KK
发明人： BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI , NISHIKAWA KOZO , KANDA MASAYUKI
IPC分类号： B29C65/36 , B29L31/24 , F16L47/02

18. 发明专利

JPH09170692A WORK COIL FOR INDUCTIVE FUSION METHOD FOR INDUCTIVE FUSION 失效
公开(公告)号：JPH09170692A
公开(公告)日：1997-06-30
申请号：JP33006695
申请日：1995-12-19
申请人： KUBOTA KK
发明人： GOTO YUICHIRO , BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI , HIOKI MASATO
IPC分类号： F16L47/00 , B29C65/36
摘要： PROBLEM TO BE SOLVED: To shorten fusion working time for improved workability. SOLUTION: When a work coil 10 is disposed around a joint 12 and highfrequency current is applied to a conductive wire 30 from a high-frequency power source 42, magnetic flux density working upon a heater 22 decreases in a part corresponding to the section where the conductive wire 30 is wound roughly, so that the heating value of the heater 22 decreases. In a part where the heating value of the heater 22 in the joint 12 decreases, resin is fused only in a very narrow area round the heater 22, therefore, hardened earlier than the other parts. It is thus possible to function this part as a clamp until the other parts have been hardened.

19. 发明专利

JPH08200581A WELDING METHOD FOR PLASTIC PIPE 失效
公开(公告)号：JPH08200581A
公开(公告)日：1996-08-06
申请号：JP878995
申请日：1995-01-24
申请人： KUBOTA KK
发明人： KYOMEN JUNSUKE , SAKAGUCHI MASAYUKI , BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI
IPC分类号： F16L47/02 , B29C65/34 , B29L23/00 , B29L31/24
摘要： PURPOSE: To sufficiently mix fused plastic on a plastic pipe and a socket, so as to improve workability by mounting a heater provided with a fused plastic passage on the tips of the plastic pipes, and heating a heater through a process of inserting the tip into the socket of a coupling. CONSTITUTION: The tips of plastic pipes 10, 12 are inserted into a socket of a coupling 14 in a state where a magnetic alloy heater 16 is mounted on the tips of the plastic pipes 10, 12, and a high frequency current is applied to the heater 16 by electromagnetic induction. The heater 16 generates heat, and the connecting surfaces are fused. Since plastic on the front surfaces of the plastic pipes 10, 12 are directly heated and fused by the heater 16 in fusing, the fused plastic gushes out on the socket side of the coupling 14 through a fused plastic passage of the heater 16. In this process, the oxidized film or dirty layer on the front surfaces of the plastic pipes 10, 12 are parted, and the fused plastic on the pipe and the socket are sufficiently mixed.

20. 发明专利

JPH07263125A BASKET TYPE HEATER MANUFACTURING DEVICE 失效
公开(公告)号：JPH07263125A
公开(公告)日：1995-10-13
申请号：JP5549194
申请日：1994-03-25
申请人： KUBOTA KK
发明人： KYOMEN JUNSUKE , SAKAGUCHI MASAYUKI , BAI HIDEKI , TAGO TAKU , NAGAMATSU SHIGEYOSHI
IPC分类号： H05B3/06 , H05B3/00 , H05B3/40
摘要： PURPOSE:To manufacture e a high quality basket heater with low cost and in short time. CONSTITUTION:A winding wire fed from a winding wire feeding means is spirally wound on a winding wire jig 42 and a cross wire fed focm a cross wire feeding means 28 is positioned on the winding wire jig 42 so that the winding wire and the cross wire are welded together by a welding means 26 (welding electrode 104). After completion of welding, the winding wire jig 42 is rotated by a prescribed angle so as to position the next cross wire and weld it by the welding means 26 (welding electrode 104). Such cross wire supply process and welding process are repeated by the same times as the number cross wire member.

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