| 摘要 |
PROBLEM TO BE SOLVED: To improve operability by detecting the displacement of the force applied to a handhold, and controlling the opening/closing means of a door with a control means based on its detection signal. SOLUTION: When a handhold 3 is moved in the opening direction 30R to open a door, the resistance value of the strain gauge r1 of a displacement detecting circuit 4 is decreased, the displacement signal S for opening a door main body 2 is outputted, and a control circuit outputs the drive signal Ed from an operation amplifier 15. The motor drive circuit 60 of an opening/closing drive device 6 receives the signal Ed, the motor drive signal D is fed to an electric motor 62 to rotate it in the prescribed direction, and the door 2 is opened by an opening/closing mechanism 7. When a hand is removed from the handhold 3 in the middle, no force is applied to the strain gauge r1, a bridge circuit 14 is balanced, the signal S is not outputted, the signal D is not fed to the motor 62, and the opening action of the door 2 is stopped. When the handhold 3 is moved in the closing direction 30L to close the door 2, the door 2 is closed nearly likewise. When the hand is removed in the middle, the closing action is stopped. Even an old person can open or close a large door easily. |
