| 摘要 |
In an apparatus for opening and closing a working area of a machine tool (1) which comprises a front door (6) for opening and closing an operation opening (5a) formed in a cover (5) serving as a partition between the working area A and an operator, and a ceiling shutter (8) covering an upper part of the above working area A so as to be opened and closed, there is provided a detection switch for detecting a closed condition of the front door (6), and an interlocking mechanism (9) for blocking a closing operation of the front door (6) while the ceiling shutter is open.
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