| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat treatment apparatus capable of protecting a driving part against thermal effect by a simple structure.SOLUTION: A heat treatment apparatus is configured in a way that pipe members 13 for forming flow passages for a heat medium are inserted into hollow parts 4a of two output shafts 4 respectively connected integrally rotatably with two treating shafts 2 arranged in parallel in a casing 1 and rotatably driven by a driving part, an air layer 16 is arranged between outer peripheral faces of the pipe members 13 and inner walls of the hollow parts 4a of the output shafts 4, and the air layer 16 is further sealed with O rings 14 fitted in the outer peripheries of the pipe members 13. The heat treatment apparatus thus configured suppresses thermal effect from the output shafts 4 to the driving parts by employing a structure simpler than a conventional seal structure. |
