| 摘要 |
PURPOSE:To optionally adjust opening-closing force of a door by changing output of a door driving motor, and secure safety by adjusting the output of the motor according to opening of the door detected by a potentiometer. CONSTITUTION:In an opening 1a of a side wall 1, a door 2 is supported around the perpendicular axis 2a in upper and lower positions of one side end part so as to be capable of swinging in the arrow 3 direction, and the door 2 is connected to a motor 5 to constitute a driving mechanism 4 fixed above the opening 1a through a speed reducer 6 and link levers 7. Next, output of the motor 5 is transmitted to this door 2 in the ratio according to opening of the door 2 through the link levers 7, and a return spring 8 to return the door is installed on an output shaft 6a of the speed reducer 6. Next, the door 2 is opened, for example, up to an opening position of 90 degrees by rotational torque of the motor 5, and is pressed against and held by a stopper 12. When the door 2 is closed, electric power supply to the motor 5 is turned off, and the door 2 is closed by an action of the return spring 8 through the link levers 7. |
