Single-panel swing door, with an up-and-over overhead opening movement, has a single torsion spring for the hollow spring torsion shaft for weight compensation and a spring for the safety pawl tensed by rotation of its coils

摘要

The single-panel door, with an up-and-over swing movement, has a hollow torsion spring shaft (8) with only a single torsion spring (10) for weight compensation. The pawl spring, of the safety system (12) to prevent the door falling, is tensed solely by rotation of its coils, or the locking pawl is mounted in a swing holder opposite the door panel (1).