WICKLUNGS- UND FALLSCHUTZANORDNUNG FÜR TÜRGEGENGEWICHTSSYSTEM

摘要

A counterbalance system ( 25 ) for a door (D) movable between a closed position and an open position having an axle ( 20 ), a cable drum ( 15 ) attached to the axle, a winding shaft ( 35 ) interconnected with the axle by a counterbalance spring ( 26 ), and a pawl ( 70 ) selectively movable between a first position for adjusting tension in the counterbalance spring and a second position for preventing rotation of the cable drum upon failure of the counterbalance spring, thereby limiting movement of the door toward the closed position.