DEVICE FOR OPENING AND CLOSING FIRE DOOR INCLUDING CLOSING FORCE ASSISTANCE DEVICE

摘要

The present invention relates to a device for opening and closing a fire door including a closing force assistance device and, more specifically, to a device for opening and closing a fire door including a closing force assistance device, capable of reducing a load generated when a fire door is open or closed by having a simple structure and enabling all people regardless of age and sex to easily open the fire door in emergency by minimizing required power to open the fire door. The device for opening and closing a fire door includes: a door closure main body connected to a door frame by a link arm; and the closing force assistance device connected to the lower part of the door closure main body. The link arm comprises: a first link arm connected to the door frame; and a second link arm connected between the first link arm and the door closure main body. The second link arm has a bending unit enabling a connection unit with the first link arm to face the inner side of the fire door.;COPYRIGHT KIPO 2016