| 摘要 |
According to the present invention, a device for supplementing a closing force of a door closer for a fire door supplementing a rotational force of a driving shaft of a door closer. A rotating plate is installed to be rotated inside a case, and a plurality of rollers are installed in an edge of both side surfaces or one side surface of the rotating plate and arranged in a circumferential direction of the rotating plate. Moreover, a rotor supplements the supplementing force to the first roller among the rollers and is supported by a portion of the rollers among the rollers when the fire door is opened, and a moving body is coupled with the rotor with a hinge. Therefore, the present invention minimizes a frictional force between the roller and the rotor to prevent the fire door from being stopped and easily supplements the closing force of the fire door even if pressure of an indoor space is increased due to a fire of the indoor space. |
