| 摘要 |
A latch for a gliding door unit includes a latch assembly mounted in the leading edge of a gliding door and a complementing keeper assembly mounted in the facing jamb of the door unit. The latch assembly has a face plate from which a latch can be deployed by operation of a handle on the gliding door. The keeper assembly has a strike plate and a keeper. The door is latched shut by sliding the gliding door against the jamb and operating the handle, whereupon the latch deploys from the face plate to lodge behind and capture the latch. The latch mechanism includes an anti-activation mechanism that includes a depressible trigger projecting from the face plate toward a target zone on the strike plate. The latch is operable when the trigger is depressed and is prevented from being operated when the trigger is extended. A fault aperture is formed in the strike plate below the target zone. As long as the strike plate and the face plate are substantially aligned, the trigger engages and is depressed by the target zone of the strike plate when the door is slid shut, thus allowing operation of the latch to latch and lock the door. If the door becomes downwardly displaced with respect to the jamb so that the latch might not securely capture the keeper if deployed, the trigger does not engage the target zone but instead extends into the fault aperture and is not depressed. The resulting inability of a user to operate the handle to deploy the latch serves as an indication or warning to the user of a misalignment of the door that should be repaired.
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