| 摘要 |
The present invention relates to an automatic closing device for a fire door, which is installed on the fire door in a smoke control area formed on each floor of a building, and restricts the fire door in an open state in a normal situation, but automatically locks the fire door by a closing force provided from a door closer by releasing a state of restriction in case of fire. More specifically, the automatic closing device for a fire door comprises: a main body; a rotary shaft installed on the main body; a link arm whose one end part is fixed to the rotary shaft to be rotated with respect to the rotary shaft, and which connects the rotary shaft and a link arm of a door closer; and a restriction part which restricts the rotary shaft interlocked with the link arm of the door closer through the link arm. |
