Elevator Door Lock with Dual-Point Synchronized Mechanism
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Solution Overview
Problem
Traditional lift floor door locking systems are prone to deviation and misalignment during forced opening attempts or testing, lack adequate safety for emergency openings, and are vulnerable to vandalism, with insufficient bottom-end locking mechanisms.
Innovation Solution
A dual-lock system featuring a primary lock at the top and a secondary pivoting bolt at the bottom, connected by linkages that ensure synchronized locking and emergency release, preventing deviation and vandalism while allowing secure and quick opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional top-only locking mechanism is used, then the door can be locked at the top part, but the door deviates and misaligns during forced opening attempts
Solution Approach 1:
The locking mechanism is segmented into two independent locks: a first lock positioned at the top part of the door and a second lock positioned at the bottom part. This segmentation allows each lock to independently prevent deviation in its respective region, with the bottom lock specifically addressing the misalignment issue during forced opening attempts.
Solution Approach 2:
The invention adds a spatial dimension to the locking system by positioning locks at both the top and bottom of the door vertically. This dimensional distribution ensures that forcing the door open creates conflicting forces in opposite directions, preventing the bottom deviation that occurs with top-only locking.
2Reliability
If independent dual locks are used, then bottom locking is provided, but emergency opening is delayed
Solution Approach 1:
The two independent locks are merged into a single synchronized operation through a common actuating mechanism. When the emergency release is activated, both the top lock and bottom lock are released simultaneously, eliminating the time delay that would occur if the locks operated independently during emergency opening.
Solution Approach 2:
The locking system is designed with multi-functionality to serve both normal operation and emergency release requirements. The same actuating mechanism controls both locks during normal closing, but can simultaneously release both locks during emergency opening, providing universal functionality for both safety and quick evacuation scenarios.
3Ease of operation
If the bottom lock is made accessible, then emergency opening is enabled, but vandalism and unauthorized opening increase
Solution Approach 1:
The emergency release mechanism is positioned in a specific location that is accessible for emergency operations but protected from vandalism. The design provides localized accessibility where needed while maintaining security in other areas, allowing emergency personnel to activate the release without exposing the entire locking mechanism to potential vandals.
Solution Approach 2:
An intermediary mechanism is introduced between the external environment and the bottom lock. The emergency release requires a specific activation sequence or mechanism that prevents direct access to the lock, serving as a mediator that allows legitimate emergency opening while blocking unauthorized vandalism attempts.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The dual-lock system provides enhanced safety and reliability by preventing door deviation during testing and emergency openings, while resisting vandalism and ensuring secure closure, even when the cabin is absent.
Implementation Method 1
the corresponding doors are released by the effect of the slide that engages the wheels of the safety lock and rotates them
Implementation Method 2
said second bolt being articulated on a support and pivoting along a plane parallel to the plane that identifies the inside and/outside surface of the doors themselves
Data Source
Figure 1~1A
Figure 2~2A
Figure 3~3A
AI summary
An improved device for locking the floor door of lifts, applied to a pair of doors or panels (10-12) of a floor door, sliding along an upper track (14) through respective slides (18-20) and along a lower threshold (16), comprises a primary keyhole (24), fixed to the crosspiece (22) of said floor door, whereto a pivoting lock (26) is connected, provided with a bolt (28) engaged with the primary keyhole (24) and the secondary keyhole (30); said device comprises a second bolt (32), placed at or in the proximity of, the lower end of the floor door and fixed inside one of said doors (10) or (12). The second bolt is articulated on a support (34) and pivots along a plane parallel to the plane that identifies the inside and/or outside surface of the same doors hooking the opposite door (10) or (12) to the fitting bolt (32) in a slit made into the door.