| 摘要 |
<p>The equipment room swinging door (2) for a sports hall is mounted on a plate on the exterior face of the door. The locking bolt is mounted upwardly on the locking tongue and is guided upwardly through the surrounding frame (1). The lower region has a return spring which equalises friction forces. The door has an upper runner with tandem rollers and a cable safety. There are counterweights at right and left behind the block frame of the door.</p> |
