| 摘要 |
A multiple bolt locking mechanism, particularly for use with sliding doors, comprises a upper main locking unit on the door narrow stile frame having a hook- type bolt (18) actuatable by a key mechanism (16) between an unbolted position and a dead-locked bolted position, a lower slave lock unit (20) on the door stile frame having a hook-type bolt (18a), and an upper slave header locking unit (24), having a longitudinally reciprocable bolt (30) for bolting engagement with door frame header keepers. The header bolt is spring biased towards a fully projected normal position for operatively entering a receiving opening of a header keeper when the door is in fully closed position or in a partially open position, but is movable against the basing spring to a retracted position upon failure of the bolt to enter the bolt receiving opening of an associated header keeper due to misalignment or upon engagement with an adjacent header surface. <IMAGE> |
