| 摘要 |
PURPOSE:To omit a slip ring which serves as a power supply means for a heater by providing a dual rotation driving part and a fixed part and burying a heater into the fixed part. CONSTITUTION:A wood metal having a low melting point is provided as a heat medium 12 in a gap formed between a rotation driving part 4 and a heater block 6. The temperature of the wood metal detected by a temperature detector 8 is inputted to a temperature controller 10. The controller 10 compares this input signal with the reference temperature of the medium 12 which is set previously and sends a heater control signal to a power controller 9. The controller 9 controls the heat of a heater 7 based on the heater control signal given from the controller 10. So that the medium 12 is always kept at a desired temperature. In such constitution, a slip ring serving as a power supply means for the heater can be omitted. |
