| 摘要 |
PURPOSE:To prevent generation of a deviation of a heat pipe even when the heat pipe receives an excessive thermal hysteresis by providing a slight stepped portion at least at a part of a contact surface between the heat pipe and the shaft device, in the shaft device containing the heat pipe. CONSTITUTION:A heat pipe 2 made of copper, in which a working fluid 3 which is water is sealed, is disposed in a middle hole of a rotary shaft 1 made of copper, and a stepped portion 6 is provided at the central part between the rotary shaft 1 and the heat pipe 2. The deviation of the heat pipe 2 within the shaft 1 contaning therein the heat pipe 2 can be prevented by this stepped portion 6.
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