| 摘要 |
PROBLEM TO BE SOLVED: To simply perform changing connection of a high-frequency power supply to a multiplicity of high-frequency apparatuses by providing a movable contact for changingly connecting a power supply terminal to at least one of apparatus terminals and a means for operating the movable contact. SOLUTION: A power supply terminal 18 of a soft switching device 16 for high frequency is connected to a high frequency power supply 10 via a water- cooled cable 11 while apparatus terminals 19, 20 thereof to high frequency heating furnaces 12, 13 via water-cooled cables 14, 15, respectively. This changer 16 has a movable contact 21 for changingly connecting the power supply terminal 18 to one of the apparatus terminals 19, 20 and a driving/operating means 22 for operating the movable contact 21. A drive motor, a solenoid, or the like can be used as the operating means 22. By controlling the operation of the operating means 22 in an operating room 17, the movable contact 21 can be changingly connected to one of the apparatus terminals 19, 20 in a simple manner.
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