Elevator Door Roller Replacement via Modular Hanger Mount
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Solution Overview
Problem
Existing elevator door systems are difficult to service and upgrade due to the burdensome process of replacing rollers and tracks, which often requires cutting and removing integral components, compromising the building structure and necessitating specific material replacements like nylon rollers and steel tracks.
Innovation Solution
The introduction of a hanger mount, leveling cam, and engaging member system that allows for the easy replacement of roller assemblies by positioning the hanger mount within the door hanger opening and the leveling cam on the other side, enabling secure installation without cutting or compromising the header, and providing adjustable height and compatibility with different materials like nylon rollers and steel tracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rollers and tracks are replaced in prior elevator door systems, then the material requirements (nylon rollers and steel tracks) can be met, but the replacement process requires cutting the door hanger off the door and removing the header, which compromises building structure and increases service difficulty
Solution Approach 1:
The invention divides the door assembly into separable components: the header is made detachable from the building structure, and the roller assembly is made independently replaceable. This allows the roller and track to be replaced without cutting the door hanger or compromising the building structure, thus maintaining material compliance while dramatically easing service difficulty.
Solution Approach 2:
The header is extracted as a separate, removable component from the building structure. This extraction allows the entire header assembly (including track and roller mounting points) to be removed and replaced as a unit, eliminating the need for cutting operations and structural compromise while ensuring proper material specifications are met.
2Ease of manufacture
If the header is removed in prior systems, then roller and track replacement can be performed, but the building structure around the header is compromised
Solution Approach 1:
The header is designed with pre-integrated mounting features and attachment mechanisms that allow for non-destructive removal and reinstallation. The preliminary design of detachable connections enables replacement operations without compromising building structure, while still achieving the feasibility of roller and track replacement.
3Ease of manufacture
If aluminum rollers and plastic tracks are used in prior systems, then the door assembly can be assembled, but job specifications requiring nylon rollers and steel tracks cannot be met
Solution Approach 1:
The header and mounting system are designed with universal compatibility to accommodate different roller and track material specifications. The standardized interface and attachment mechanisms allow the same header structure to support nylon rollers and steel tracks (meeting job specifications) while maintaining assembly simplicity through consistent mounting procedures.
Data Source
AI summary
A method for replacing parts of an elevator door assembly including installing a hanger mount in an opening of the elevator door hanger, positioning a roller assembly on one side of the elevator door hanger, the roller assembly being configured to receive an engaging member, positioning a leveling cam on another side of the elevator door hanger, the leveling cam configured for sliding contact with a bearing surface of the hanger mount and having a first surface, a second surface, an opening between the first surface and the second surface, and a third surface for contacting the bearing surface, and inserting the engaging member through an opening of the hanger mount and the opening of the leveling cam, and securing the engaging member within the roller assembly.