| 摘要 |
PROBLEM TO BE SOLVED: To largely lighten the burden of an operator at the time of opening and closing of a door, and to conduct the open-close operation of the door accurately. SOLUTION: The open-close device for the door has the door 3 being opened by rotation to an upper section while being able to be held at an open place, an air source 12 and a piston 16 connected to the door 3, and an air cylinder 11 driving the door 3 at the open place by operating the piston 16 by air supplied from the air source 12 is installed. An on-off valve SV being mounted between the air source 12 and the air cylinder 11 and communicating the air cylinder 11 with the air source 12 at the time of opening and communicating the air cylinder 11 with the atmospheric air at the time of closing, switches SL, SR operated for opening the on-off valve SV, a detecting means LS detecting the opening of the door 3 and a control circuit 14 closing the on-off valve SV when the detecting means LS detects the opening of the door 3 are fitted. |
