| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent an abrupt opening of a door when a door opening instruction is output when a door closing force is low. SOLUTION: When the opening instruction of a door 1 is output in a state a pressure is reduced, a pressure switching solenoid valve device 5 is switched to a reduced pressure by a control part 8, and a door closing solenoid valve 6 is switched to a door closing position after a specified time is passed after the opening instruction is given.</p> |
