Elevators TRIZ Cases

A retractable crosshead connects and separates to provide structural support or maintenance access in elevator car frames.

Strategically positioned dampers detect rope sway contact to adjust elevator operations, reducing vibration damage in high-rise buildings.

Segmented brake cylinders adjust force levels via load detection, resolving the trade-off between passenger safety and system complexity.

Dual elevator cars share a single hoistway using intersecting under-car pulleys to route ropes independently.

Differential spring force monitoring eliminates sensor drift and temperature errors in elevator brakes by comparing open and closed position forces.

Beacon signal analysis combined with gesture recognition determines user intent, eliminating unnecessary elevator calls caused by false positive detections.

A projector creates a virtual car operating panel inside an elevator car for passenger interaction.

A destination floor registration device uses a human detection sensor to capture voice input while monitoring passenger proximity.

Integrating yarns into an elastomer jacket creates a surface pattern that tunes the friction coefficient, resolving excessive friction and cracking issues.

Force measuring device detects elevator car weight and hydraulic pressure to determine maximum lifting force without damaging locking devices or guide rails.

Flex joints and isolators decouple the elevator cab from carriage noise and vibration, resolving ride comfort issues in ropeless systems.

Computer vision maps elevator controller code events to physical operations, resolving proprietary format conflicts and enabling centralized maintenance.

Access control system overrides elevator landing matrices for emergency responder entry.

A rack-and-pinion adjusting device moves double-decker elevator cages in opposite directions for precise spacing control.

Positioning sensors detect drift beyond limits and activate a parachute brake to instantly stop the car, preventing accidents during remote maintenance.

A longitudinal support device with a U-shaped slot shape-locks elevator light curtain detectors, eliminating screw holes that compromise IP-class ratings.

A counterweight speed governor sits higher than the counterweight to detect overspeed while aligning with guide rails.

Roughening the urethane jacket surface reduces adhesion between the load bearing member and traction sheave while maintaining consistent friction.

A microperforated landing door leaf integrates actuatable light sources to display floor numbers and movement direction for intuitive user guidance.

Stepwise brake release and proportional integral torque control reduce car shaking during startup despite weighing sensor errors.

A limit switch system uses a controller to activate an inspection device that extends elevator car travel beyond normal stopping points.

Light sources illuminate visible objects to guide elevator traffic, resolving impaired visibility caused by crowds and architectural structures.

A pivotable elevator car balustrade adjusts its orientation to optimize fall protection and maintenance access.

Control system detects brake failure by hovering the car to confirm loss of holding torque, then moves it using weight imbalance to enable safe evacuation.

Elevator control system adjusts traffic patterns to reroute cars around detected failures.

A spring-loaded tensioning device with guide columns and a carriage system provides precise guidance for an elevator overspeed governor rope.

Analyzing braking current derivatives detects mobile plate position deviations, eliminating complex sensor installations and reducing maintenance needs.

An eddy current detection unit reads magnetic properties from an ID sequence to specify the position of an elevating body.

A transparent protective cover shields the elevator position ruler from mechanical damage while allowing optical sensors to read data.

A control circuit separates brake excitation coils from contracting brake circuits using isolation switches and level conversion.

Centripetal cam assembly detects rail speed and triggers a jammer to wedge between rack and pinion teeth, stopping the stairlift within 6 inches.

Centripetal cams extend to shut off motor power while a jammer wedges rack and pinion teeth, stopping the stairlift within six inches without jerky motion.

Latching relay holds inspection state until return switch activates, ensuring safe transition to normal operation without complex access controls.

Removing the overspeed governor rope eliminates inertia-related safety gear activation and reduces guide rail dimensions.

Proximity detectors identify unannounced passengers traveling with a requester to enable accurate elevator car assignment.

An articulated actuating mechanism links an electromagnet to a braking element for engaging elevator guide rails.

An elevator safety monitoring device detects counterweight proximity to the car during maintenance operations.

Central guide ribs on a flat belt suspension ensure even load distribution across rope cores, extending lifespan and simplifying manufacturing.

Locking specific rope pulleys maintains constant tension, reducing displacement caused by loading changes and optimizing energy consumption.

Automated commissioning protocol for elevator peripheral devices uses identity requests and access challenges to grant network rights.

Mobile devices detect boarding status via wireless signals to reassign elevator calls, resolving reliability issues in complex detection systems.

Blocking means engage guiding means to lock the lift cage, preventing damage risk to runners and shaft components during transit.

Segmenting braking force across two independent electromagnetic actuators resolves the contradiction between high-speed travel and device complexity.

A Bluetooth module installed in elevator call panel button holes propagates signals through mounting gaps.

A tension member locks an elevator counterweight blocking stop in a default active state to prevent accidental retraction.

Accelerometer detects elevator car door vibrations to identify shaking, avoiding camera-based data protection issues and high computing power costs.

Segmented brake shoes slide orthogonally on low-friction surfaces, reducing the high force needed to reset the mechanism after activation.

Bluetooth Low Energy modules link user devices to elevator controls, enabling automatic destination requests without manual panel interaction.

Inner layer strands shield the fiber core from heat during resin coating, preventing breakage and maintaining structural integrity.