Elevator Landing Door Labyrinth Seal
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Solution Overview
Problem
Conventional elevator landing door arrangements face inefficiencies in creating a smoke barrier due to the reliance on numerous screws for fixing protective elements, which can compromise the sealing effectiveness and increase installation complexity.
Innovation Solution
The design features a protective element with a fixing portion that bends around a carrier element of the door jamb, forming a labyrinth seal, reducing the need for screws and enhancing the sealing efficiency between the door jamb and the elevator shaft wall, while maintaining compliance with fire protection regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple screws are used to fix the protective element to the door jamb, then the connection strength is improved, but the device complexity and installation time increase
Solution Approach 1:
The patent combines multiple screw fixation points into a single integrated U-shaped profile system. The U-shaped profile engages with the door jamb at multiple locations simultaneously, merging the function of multiple discrete screws into one continuous structural element that provides distributed fixation without requiring individual fasteners at each point.
Solution Approach 2:
The protective element is segmented into a U-shaped profile with multiple engagement arms that can independently contact the door jamb structure. This segmentation allows the single U-shaped component to interact with multiple structural features of the door jamb, achieving multi-point fixation through one integrated piece rather than multiple separate fasteners.
2Reliability
If multiple screws are used to ensure tight sealing, then the smoke barrier effectiveness is improved, but the installation time and complexity increase
Solution Approach 1:
The U-shaped profile is pre-formed with engagement arms positioned to automatically align with corresponding features on the door jamb during installation. This preliminary configuration of the fixation geometry allows the protective element to be quickly engaged without requiring precise alignment or sequential fastening operations, reducing installation time while maintaining sealing effectiveness.
Solution Approach 2:
The patent merges the sealing function and fixation function into a single integrated U-shaped profile system. The same structural elements that provide mechanical attachment also create the tight seal against the door jamb, eliminating the need for separate sealing components and reducing the number of installation steps required to achieve both secure fixation and smoke barrier effectiveness.
3Ease of manufacture
If a simple plate structure is used for the protective element, then the manufacturing simplicity is improved, but the sealing effectiveness deteriorates
Solution Approach 1:
The protective element employs a U-shaped profile with curved engagement arms that conform to the geometry of the door jamb structure. This curvature allows the profile to wrap around and tightly engage with the door jamb features, creating effective sealing contact areas without requiring complex multi-component assemblies. The curved geometry is achieved through standard forming processes, maintaining manufacturing simplicity while enhancing sealing effectiveness.
Solution Approach 2:
The patent transitions from a flat two-dimensional plate to a three-dimensional U-shaped profile that extends into the depth dimension. This dimensional change allows the protective element to engage with the door jamb structure in multiple spatial directions, creating overlapping seal contact areas that significantly improve sealing effectiveness while still being manufactured as a single formed piece rather than an assembly of multiple components.
Data Source
AI summary
An elevator landing door arrangement for installation in a landing door opening of an elevator shaft wall includes at least one door jamb and at least one protective element fixed at the door jamb which abuts with its sealing portion against the landing door opening. The protective element has a fixing portion facing the door jamb, whereby either the fixing portion is bent around a carrier element of the door jamb or the carrier element extends around the fixing portion of the protective element.