| 摘要 |
PROBLEM TO BE SOLVED: To provide a hollow guide shaft which is hardly broken and to which dust such as fiber waste is hardly adhered.SOLUTION: A hollow guide shaft 32, around which fibers having received the action of whirling airflow in an air spinning device revolve, has a fiber passage through which fibers twisted by the whirling airflow pass. The hollow guide shaft 32 includes a conductive base material part 50 (stainless steel) and a surface layer 51 (DLC film) provided on a surface of the base material part 50 and being harder than the base material part 50. |
