| 摘要 |
PROBLEM TO BE SOLVED: To easily draw out the body or a baggage clamped by a door by lessening the force of pressing the door in the closing direction immediately before the door is closed. SOLUTION: At the time of closing a door, compressed air is fed to a closing side supply and discharge port 15 of an air cylinder 4 through a closing side supply and discharge port 15. Immediately before a piston rod 7 of the air cylinder 4 reaches the closing completion position, a switching valve 27 is switched and a pressure reducing valve 30 is connected to the midway of the closing side supply and discharge pipe 21. As a result, the pressure of compressed air fed into the above closing side supply and discharge port 15 is lowered to weaken the force of pressing the door in the closing direction. |
