Elevators TRIZ Cases

A movable travelling cable keeper follows a guide rail to maintain tension and prevent lateral swaying in high-rise elevator shafts.

Landing-mounted input devices transmit command signals to elevator controllers for initiating emergency evacuation sequences.

A controller detects passenger counts via video data to allocate elevator cars.

An access panel on the hoistway wall allows external maintenance of internal control components.

Variable overspeed thresholds enable unified hoistway structures for multiple rated speeds, eliminating distinct pit depths and complex safety equipment.

Mobile device communicates with elevator controller to manage reserved service requests, preventing unauthorized boarding by non-VIPs.

Full-wall monitors simulate glass walls to distract riders from boredom during long elevator trips.

Segmented rim members in an elevator drive sheave rotate independently to equalize rope tension, reducing fatigue on load-bearing components.

Automated controller measures elevator door displacement to verify interlock function without technician intervention.

An elastic brake arm absorbs varying spring forces to prevent fatigue fractures while maintaining stable braking pressure.

Proximity sensors detect passenger presence near elevator buttons, triggering audio feedback that resolves accessibility barriers for sight-impaired users.

A group controller balances elevator usage by comparing actual wear against target values to select cars for calls.

Independent battery powers elevator door interrogation device to detect status changes during power failures and enable automatic operation resumption.

Segmented tape design with intermediate clips mitigates thermal elongation errors for precise position tracking.

Local processing modules reduce bandwidth requirements by extracting essential information before transmission to the central controller.

Pre-deflected buckling beams provide constant braking force while eliminating hysteresis and reducing mass compared to traditional spring arrangements.

An auxiliary energy function tests elevator safety switches during stoppage, preventing unexpected shutdowns when the system resumes operation.

A wire rope suspension device uses a wedge joint and bias limiting mechanism to lock or release rope sections during beam displacement.

Electromagnetic blocking mechanism on pivoting support arrests uncontrolled lift car movement via ring gear engagement, resolving safety complexity trade-offs.

A camera-based guidance system detects user behavior to infer arrival floors and present destination areas matching personal interests.

Capacitance-based detection triggers immediate visual and acoustic feedback on the elevator operation panel, resolving hygiene versus usability trade-offs.

Delay units regulate braking force by adjusting trigger timing based on load and speed, preventing abrupt stops.

A group management control device assigns priority cars while maintaining hall call service continuity.

Dynamic speed adjustment using load sensors increases transport capacity while maintaining safety through variable speed limits.

A spring assembly with a tapered free end wedges a roller against the guide rail to generate braking force.