Elevator Landing Door Roller Adjustment Gauge
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Solution Overview
Problem
Adjusting landing door rollers in elevators is challenging due to the difficult working position required, leading to potential misalignment, safety risks, and slow adjustment processes, especially in narrow and dark elevator shafts.
Innovation Solution
A gauge apparatus is used to mechanically copy the horizontal distance of the landing door coupler vanes to a more accessible location, such as the top track of the door operating assembly, allowing for safe and reliable adjustment of the rollers from a better vantage point, using counter surfaces and fastening means like magnets for secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the technician adjusts landing door rollers from the roof of the elevator car by leaning over the front edge to see the rollers and coupler vanes, then the adjustment can be performed, but the working position is difficult and dangerous, leading to potential misalignment and safety risks
Solution Approach 1:
A gauge apparatus is introduced as an intermediary tool between the technician and the landing door rollers. The gauge is fastened to the top track and provides reference surfaces that allow the technician to adjust the rollers from a safe position on the roof without needing to lean over the front edge and visually align with the coupler vanes in the narrow gap
Solution Approach 2:
The gauge apparatus copies the horizontal positions of the coupler vanes to the top track location. By transferring the reference information from the difficult-to-access vanes to the easily accessible top track, the technician can achieve precise alignment without being in an awkward working position
2Measurement precision
If the technician tries to see the landing rollers and coupler vanes simultaneously in the narrow gap between the elevator car and front wall, then alignment verification is possible, but the task is difficult and slow due to poor visibility and awkward positioning
Solution Approach 1:
The gauge apparatus creates a copy of the coupler vane positions at the top track, making the reference information immediately accessible without needing to visually measure the narrow gap between the car and front wall. This copying process enables fast verification of roller alignment
Solution Approach 2:
The reference system is moved from the horizontal narrow gap dimension to the vertical top track dimension. By placing the gauge at the top track, the technician can verify alignment from above rather than trying to see sideways into the narrow gap, fundamentally changing the observation dimension
3Reliability
If the gauge apparatus is fastened onto the top track with magnets or screws, then the correct positioning of the gauge is guaranteed, but the device complexity increases due to additional fastening components
Solution Approach 1:
Magnetic fastening elements are introduced as intermediary components between the gauge apparatus and the top track. These magnets provide reliable attachment without requiring mechanical fastening holes or complex clamping mechanisms, simplifying the overall device while maintaining positioning reliability
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
This method significantly reduces the time and risk associated with adjusting landing door rollers, enhances safety, and improves ride comfort by enabling precise and efficient alignment without awkward working conditions.
Implementation Method 1
The gauge apparatus is fastened onto the top track with at least a magnet or screws, or with any other suitable fastening means.
Data Source
AI summary
The invention relates to a method and apparatus for adjusting landing door rollers in an elevator comprising at least an elevator car having at least a car door, a door operating assembly and a landing door coupler with its two vanes, and the elevator comprising an elevator shaft equipped with a landing door at each landing level. For adjusting the landing door rollers the mutual horizontal distance of the vanes of the landing door coupler is copied mechanically into the location further up in the elevator car than the location of the vanes.