Elevator Derailment Detection Circuit With Segmented Hoistway Wire
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Solution Overview
Problem
Conventional elevating body derailment detection devices require maintenance personnel to carefully avoid electrical wires during maintenance, leading to decreased work efficiency due to the need to prevent contact with wires arranged over the entire hoistway length.
Innovation Solution
An elevating body derailment detection device with a wire, suspension member, arm, and detection circuit that allows for electrical disconnection when the elevating body is disengaged from the guide rail, eliminating the need for maintaining personnel to avoid the wire, using a detection unit to detect disengagement or wire breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical wires are arranged over the entire length of the hoistway for derailment detection, then detection reliability is improved, but maintenance work efficiency deteriorates due to the need to carefully avoid contact with the wires
Solution Approach 1:
The electrical wire is divided into multiple sections by suspending it at intervals using suspension members. This segmentation allows maintenance personnel to access and work in the hoistway without continuous electrical wires spanning the entire length, thereby improving safety and work efficiency while maintaining detection capability at critical points.
Solution Approach 2:
The electrical wire is extracted from a continuous arrangement and removed from sections where it would obstruct maintenance work. The wire is only present where needed for derailment detection (at the elevating body and counterweight), eliminating the harmful presence of wires in maintenance zones.
2Reliability
If electrical wires are arranged continuously in the hoistway for detection purposes, then detection coverage is improved, but work safety deteriorates due to risk of contact with live wires
Solution Approach 1:
The continuous electrical wire is segmented into discrete sections suspended at intervals. This reduces the electrical hazard zone while maintaining detection capability at critical locations where derailment would occur.
Solution Approach 2:
The electrical wire is extracted from continuous coverage and removed from areas where maintenance personnel work, eliminating the electrical contact hazard in those zones while preserving detection function where needed.
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 configuration prevents the need for careful wire avoidance during maintenance, enhancing work efficiency by allowing safe and efficient detection of derailments and wire breaks without continuous electrical contact.
Implementation Method 1
a detection circuit that has second conductive parts to be electrically connected to the first conductive part, and in which a current flows via the first conductive part
Data Source
AI summary
An elevating body derailment detection device includes a wire, a suspension member, a detection circuit, an arm, and a detection unit. The wire is arranged in parallel with an elevating direction. The suspension member is provided at one end of the wire, and is provided with the first conductive part. The detection circuit includes second conductive parts to be electrically connected to the first conductive part. In the detection circuit, a current flows via the first conductive part. The arm is provided to an elevating body, and has a hollow portion through which the wire is to be passed in parallel with the elevating direction. When the elevating body is disengaged from the guide rail, the hollow portion contacts the wire to move the suspension member so that the first conductive part is electrically disconnected from the second conductive parts, and then the detection unit detects a derailment.