The present invention can maintain a locked state remains in that on the automatic closing device, it is more particularly the limited operation of the pivoting means, which is installed normally connected to the door panel by the locking device, open the fire door with little or no aid this press release is an event of a fire emergency switch locks the doors as pivoting means is rotated about the automatic closing device which allows automatically closed.
The invention door closer and, in the door closer and the automatic closing device comprising a link arm that is installed connected between the door frame, and the main body part to which the door closer is installed on the upper side of the door panel, the main body and a driving unit that is installed connected between the link arm, and the fixing means which is installed connected to the drive unit in the body portion inner side, is installed connected to said fixing means installed connected to the support means and means for the support which limits the movement of the fixing means characterized in that the unlocking means are configured including releasing the supported state of the fixing means by the support means.