Elevator Door Panel Slider Bracket Retention Design
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Solution Overview
Problem
Existing elevator door systems face safety and compliance issues due to the susceptibility of retaining features integrated in slider brackets to poor installation or human mistakes, which can lead to derailment and compromise safety and EN81-20/EN81-71 compliance, especially during maintenance and impacts.
Innovation Solution
The integration of an irremovable panel slider bracket assembled during manufacturing, featuring a lateral protruding lower part that forms a hook with the sill, and an articulated appendix to limit vertical clearance, ensuring secure engagement and preventing derailment without hindering installation or maintenance processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If retaining features are integrated in slider brackets designed to be periodically disassembled and inspected during maintenance visits, then ease of maintenance is improved, but reliability deteriorates due to sensitivity to human mistake during installation and maintenance
Solution Approach 1:
Instead of making the retaining feature disassemblable for maintenance, the patent makes it permanent and irremovable. The slider bracket is designed to be assembled during panel manufacturing and cannot be removed, inverting the conventional approach where maintenance components are designed for periodic disassembly. This eliminates the risk of human error during maintenance while ensuring continuous reliability.
2Ease of manufacture
If retaining features are assembled on site as finalization of door panel installation sequence, then ease of installation is improved, but reliability deteriorates due to code compliancy issues and safety risks from poor installation or human mistakes
Solution Approach 1:
The retaining feature is pre-assembled to the door panel during manufacturing before installation. The slider bracket is permanently attached to the panel in the factory, ensuring proper installation and eliminating on-site assembly errors. This preliminary action guarantees code compliance and reliability while maintaining ease of installation as a complete unit.
3Reliability
If lateral protruding lower part extends below sill structure to form hook, then reliability is improved by preventing panel derailment, but device complexity increases
Solution Approach 1:
The retaining feature is merged with the slider bracket itself. The lateral protruding lower part is an integral component of the slider bracket, combining the guiding function and the retaining function in a single element. This merging prevents panel derailment while avoiding the complexity of separate retaining mechanisms.
Data Source
AI summary
An elevator door arrangement comprises an elevator door panel (1) and a door sill (30), the door panel (1) being movable along the door sill (30); the door panel (1) comprises at the bottom at least one panel slider bracket (10) being movable in a groove (31) of the door sill (30); and the arrangement comprises at least one panel slider (20) mountable to said at least one slider bracket (10) and slidable in the groove (31); wherein the slider bracket (10) comprises a lateral protruding lower part (11) which is configured inside the sill (30) to extend below a sill structure (32). A method for guiding an elevator door in an elevator door arrangement.