PROTECTION STRUCTURE OF DROPPING OF SWING TYPE DOOR FOR CONSTRUCTION

摘要

PURPOSE: A structure for preventing a hinged door from sagging is provided to minimize the gap between a door frame and a door and to consecutively and precisely adjust the height of a roller. CONSTITUTION: A structure for preventing a swing door from sagging is composed as follows. A roller support rail(30) having an inclined corner portion is installed on the inner top of a door frame(20). A bracket(40) having a roller support shaft(42) is installed on the side top of a door(22). An eccentric ring(50) having an exposed flange(52) is installed on the roller support shaft. A height adjusting drill hole(54) is formed along the outer surface of the exposed flange. A roller(60) is installed on the eccentric ring. The eccentric ring is fixed to the roller support shaft using a fixing bolt(70) coupled to a tap hole formed on the roller support shaft. The fixing bolt has a bolt head(72) for restricting the axial movement of the roller.