| 摘要 |
PURPOSE:To prevent an operator from encountering a risk even though he cannot expect a movement of a movable part due to any reason in the case of maintenance of a working device. CONSTITUTION:When a maintenance change-over switch 28 is changed over so as to set a maintenance mode, the switch 28 is energized so that a CPU 19 energizes a relay contact 24 for maintenance, and accordingly, a buzzer 30 is actuated before the movement of a feed bed 2 is started even if the movement of the feed bed 20 can be made although a safety guard 14 is opened, thereby the operator can notice of the movement of the feed bed. |
