Elevator Derailment Detection Device Tensioning Mechanism
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Solution Overview
Problem
Existing derailment detection apparatuses for elevators require significant time and labor to apply sufficient tension to conductive lines, making installation and maintenance cumbersome, especially for longer raising and lowering strokes.
Innovation Solution
The derailment detection apparatus includes a conductive line supported by upper and lower devices with a guide portion that allows the lower support device to move along the guide rail, enabling easy application of tension by loosening fasteners, thereby simplifying installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a threaded bar and nut combination is used to apply tension to the conductive line, then sufficient tension can be achieved to prevent oscillation, but the installation and maintenance require excessive time and labor
Solution Approach 1:
The patent replaces the complex mechanical threading system with a simple clamp-based mechanical fastening system. The clamp device with C-shaped body and pressing member provides sufficient tension and stability without requiring threaded bars and nuts, thereby dramatically reducing installation and maintenance time while maintaining conductive line stability
Solution Approach 2:
The patent changes the fastening mechanism from a threaded connection (requiring multiple turns) to a clamp-based compression connection. This parameter change in the fastening method allows sufficient tension to be applied quickly through simple clamping action rather than repeated threading, resolving the contradiction between stability and installation time
2Stability of the object's composition
If a threaded bar and nut combination is used to apply tension to the conductive line, then sufficient tension can be achieved to prevent oscillation, but the device complexity increases
Solution Approach 1:
The patent substitutes the complex threaded bar and nut assembly with a simpler clamp device consisting of a C-shaped body and a pressing member actuated by a screw mechanism. This simplified mechanical system achieves the same tensioning function with fewer components and lower complexity, while maintaining sufficient stability for the conductive line
Solution Approach 2:
The patent extracts and removes the threaded bar component from the fastening system, retaining only the essential clamping function through the C-shaped body and pressing member. This extraction simplifies the overall device complexity while preserving the necessary tensioning capability for conductive line stability
Data Source
AI summary
A derailment detection apparatus for an elevator includes a conductive line, an upper support device configured to support an upper end portion of the conductive line, a lower support device configured to support a lower end portion of the conductive line, a contact element, which is installed on an ascending/descending body, and is brought into contact with the conductive line when the ascending/descending body derails from guide rail, and a detection unit configured to detect contact of the contact element with the conductive line. The lower support device is fixed to the guide rail by fastening a fastener, and is allowed to move upward and downward along the guide rail by loosening the fastener. The lower support device includes a guide portion configured to guide upward and downward movement of the lower support device along the guide rail.