Door closer, particularly overhead door closer for automatically closing and releasing wings of door, has roller bearing that is rotatably mounted at transmission element at housing to roll directly on wall portion of housing

摘要

The door closer (11) has a control curve (19) of a shutter element (15) that cooperates jointly with an accumulator piston (21) to move a displaceable support roller (33) against the biasing force of a spring element (27) in a housing (13). A transmission element (25) is supported by a roller bearing (37) in a support direction (A) at the housing. The roller bearing is rotatably mounted at the transmission element. The roller bearing rolls directly on a wall portion (39) of the housing. The supporting direction extends transverse to a displacement direction (V) of the accumulator piston.