AUTOMATIC DOOR

PROBLEM TO BE SOLVED: To provide an automatic door, capable of moving a door at the optimum moving speed according to the circumstances and dispensing with a special safety mechanism. SOLUTION: This automatic door includes the door 10, a driving means 20 for opening and closing the door 10, a detecting means 40 for sending a detection signal according to the moving acceleration of the door 10 in the opening and closing direction of the door 10, and a control means 30 to which the detection signal sent by the detecting means 40 is input to control the operation of the driving means 20. When the door 10 is moved by external force, the control means 30 moves the door 10 by the driving means 20 at the speed according to the detection signal sent by the detecting means 40. Thus, the malfunction of the door 10 can be prevented, and the door 10 can be opened and closed only when required to be opened, so that the door 10 can be moved at the optimum speed according to the circumstances of the door 10 moved by external force. COPYRIGHT: (C)2003,JPO