Hoistway Survey Tool With Sliding Member for Dropline Alignment
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Solution Overview
Problem
Measuring the position of droplines in an elevator hoistway requires mechanics to lean into the hoistway, leading to unstable positioning and potential safety hazards.
Innovation Solution
A hoistway survey tool with a first member, a platform, and a second member that can slide and pivot, allowing for safe and accurate measurement of droplines relative to the hoistway walls without requiring mechanics to lean into the hoistway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanics measure droplines by leaning into the hoistway, then they can directly access the measurement location, but their positioning becomes unstable and safety hazards increase
Solution Approach 1:
The patent introduces a survey tool as an intermediary device that extends into the hoistway from a stable position on the landing. The tool includes a platform that rests on the landing floor and a measuring member that extends into the hoistway to contact the dropline, allowing measurements to be taken without the mechanic leaning into the hoistway. This resolves the contradiction by providing both stable positioning (mechanic remains on landing) and measurement capability (tool reaches dropline).
Solution Approach 2:
The survey tool is divided into multiple functional segments: a platform portion that provides stable support on the landing, a connecting member that links the platform to the measuring mechanism, and a measuring member that contacts the dropline. This segmentation allows each component to perform its specific function optimally while maintaining overall system stability and measurement accuracy.
2Ease of operation
If mechanics lean into the hoistway to measure droplines, then they can perform the measurement task, but survey time increases due to repositioning requirements
Solution Approach 1:
The survey tool serves as a stationary intermediary platform that remains positioned on the landing throughout the measurement process. The mechanic operates the tool from this stable position, extending the measuring member into the hoistway as needed. This eliminates the time-consuming repositioning that would occur if the mechanic had to lean into or move within the hoistway for each measurement point.
3Device complexity
If a simple measuring device is used, then the device complexity is low, but the ability to measure from a stable position without leaning into the hoistway is limited
Solution Approach 1:
The survey tool employs segmentation to achieve safe measurement capability without excessive complexity. The tool is divided into a platform portion for stable positioning, a connecting member for structural linkage, and a measuring member for dropline contact. Each segment is relatively simple in design, but together they provide the comprehensive functionality needed to measure from a stable position safely.
Data Source
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Figure 4A~4C
AI summary
A hoistway survey tool, having: a first longitudinal member; a platform coupled to the first member; a second member coupled to the second end of the first member, and has: a first leg; and a second leg that is normal to the first leg , the second member is configured to move toward and away from the first member, the second leg includes a first slot, a first slider in the first slot, and a first scale, and in operation the tool identifies a position of a first dropline in a hoistway relative to a first sidewall of the hoistway, when the bottom face of the platform is positioned on a landing floor at a ledge of a doorway, the first member is against a front wall of the hoistway, and the first slider is aligned with the first dropline.