Elevator Guide Rail Alignment Using Stored Shaft Measurements
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Solution Overview
Problem
Conventional elevator guide rail alignment processes are hindered by harsh environmental conditions, such as strong winds and sunlight, which cause shaft movement and visibility issues, leading to prolonged alignment times and reduced alignment quality.
Innovation Solution
The method separates the alignment process into two steps: measuring the guide rail position in optimal conditions and aligning the rails later using stored measurement results, eliminating the need for real-time environmental stability during alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional alignment process is performed simultaneously during optimal conditions, then measurement precision is improved, but alignment time is prolonged due to limited working hours
Solution Approach 1:
The alignment process is divided into two independent phases: a measurement phase performed under optimal environmental conditions to capture precise guide rail positions, and an alignment phase that can be executed at any later time using stored measurement data. This segmentation eliminates the time loss by allowing measurement and alignment operations to occur at different times rather than simultaneously requiring optimal conditions.
Solution Approach 2:
Measurement operations are performed in advance under optimal environmental conditions, and the measurement results are stored for later use. This preliminary action allows the alignment process to be initiated at any time without being constrained by environmental conditions, thereby reducing the overall alignment time while maintaining measurement precision.
2Productivity
If alignment work is performed during harsh environmental conditions, then productivity is improved, but measurement precision deteriorates due to shaft movement and visibility issues
Solution Approach 1:
The process is segmented into measurement and alignment phases, where measurement is performed under optimal conditions to ensure precision, while alignment can be executed at any time regardless of environmental conditions. This resolves the contradiction by separating the precision-critical measurement operation from the productivity-critical alignment operation.
Solution Approach 2:
Stored measurement results act as an intermediary between the measurement phase and alignment phase. These stored data enable the alignment process to proceed independently of environmental conditions, allowing productivity to be maintained while measurement precision is preserved through separate optimization of each phase.
3Device complexity
If measurement and alignment are performed simultaneously, then device complexity is reduced, but alignment quality deteriorates due to environmental instability
Solution Approach 1:
By segmenting the process into separate measurement and alignment phases with stored measurement data as an intermediary, the system achieves higher alignment quality without significant increase in complexity. The measurement phase captures precise positions under optimal conditions, and the alignment phase uses this stored data to achieve accurate positioning regardless of environmental conditions.
Data Source
AI summary
A method and arrangement for aligning elevator guide rails includes a measuring step and a separate aligning step. The alignment of guide rails supported with adjustable fastening members in the shaft is measured in several measurement points along the height of the guide rail line based on at least one reference line provided in the vicinity of the guide rails. The measurement results are stored into a memory. The guide rails are aligned based on the measurement results stored in the memory. The aligning step is carried out after the measurement results of all measurement points have been stored in the memory.