Elevators TRIZ Cases

A counterbalance drive system uses a compliant connector to absorb overdriving forces and prevent counterweight disengagement during vertical slide movement.

Electronic sensors and a controller replace mechanical governors to reduce installation complexity while maintaining safety protection.

Hydraulic tensioning system replaces heavy counterweights in ultra-deep shaft guides, reducing space and cost while maintaining stable rope force.

Control unit resets elevator shaft access monitoring using existing user interface inputs compared to reference values.

A service tool transmits a signal detected by an elevator car sensor to halt the drive system for safe roof access.

An asymmetrical brake assembly uses two coils to independently activate multiple segments for flexible timing control.

Asymmetric lobed rotor tailors distinct upward and downward speed thresholds, resolving comfort versus safety trade-offs in elevator governors.

An electromechanical safety gear uses magnetic coupling to hold an activation plate, enabling rapid emergency braking for elevator cars.

Dual switch feedback detects stuck-at faults and corrosion in elevator safety devices, ensuring reliable maintenance access.

A destination call control method anticipates additional passengers to adjust elevator car space requirements dynamically.

Beacons transmit poll signals and receive responses to calculate passenger distance for elevator dispatching.

Adjustable stop and independent spring force mechanisms resolve misalignment friction without affecting each other.

Replacing mechanical limiters with electromagnets reduces energy consumption while ensuring rapid, reliable safety gear activation during power failures.

Segmented clamping and magnetic elements stabilize elevator information carriers against twisting, ensuring precise reader positioning.

LiDAR sensors detect elevator cabin position and speed, allowing the shaft controller to manage overspeed conditions and reduce mechanical wear.

Stationary inductive sensor detects rotation speed of unsymmetrical elevator components via magnetic field variations.

Segmented roller guide bodies use temporary shoes for precise alignment during installation, reducing maintenance time while preventing tilting.

A triggering arm rotates with a core ring to activate an overspeed protection switch in elevator speed governor assemblies.

Contoured belt-like ropes with longitudinal guide ribs engage matching wheel circumferences to prevent lateral sway in lightweight elevator roping systems.

Basalt fiber tension members resolve carbon fiber heat sensitivity by providing UL94 V0 fire resistance and maintaining structural integrity.

Integrating the power unit in a door frame chamber dissipates waste heat into the shaft while isolating noise interference.

Segmented safety struts on the elevator cab roof reduce air resistance and material costs while preventing falls through shaft gaps.

Master controller actuates elevator brakes with varied forces to prevent abrupt stops and ensure level car positioning.

An automated elevator brake testing system initiates electronic safety actuator tests and analyzes braking data to verify performance.

Vibration motors and hydraulic cylinders generate controlled mechanical forces to dislodge compacted coal, eliminating manual unblocking hazards.

Onboard sensors monitor real-time rail geometry and compare it against stored parameters, preventing operation on incorrectly installed rails.

A rollable fall protection system uses a deflection device to keep the barrier flush with the car door sill.

A mobile device system filters unintended elevator calls by detecting travel direction through location device interactions.

Elevator control apparatus estimates governor encoder errors from rope expansion using landing plate detector signals, eliminating additional speed detectors.

A counterweight-mounted barrier blocks turbulent airflow between the elevator car and counterweight to reduce bypass noise.

Segmenting detection across two cars overcomes distance-related precision loss to prevent resonance faults.

Optical sensor detects lift car position via light source for precise height adjustment.

A counterweight slack detection switch uses a lever arm and deflectable member to monitor tension member position.

A regenerative drive controller adjusts elevator motion profiles to match irregular power supply voltage levels.

Closed support belt eliminates counterweights to reduce shaft cross section while coupling element joins belt ends.

A car controller verifies primary door opening requests against local control signals to transmit or withhold secondary requests.

Pre-tensioning elevator suspension members equalizes tension member elongation, reducing twisting and tracking issues during operation.

A counterweight frame transports elevator components along guide rails to assembly positions.

Sensor assembly detects elevator sill gap variations between the door and guide gib to maintain proper mechanical seating.

Logarithmic averaging of real-time data dynamically adjusts reference slowdown distance to resolve inconsistent leveling times in hydraulic elevators.

Gravity-driven stop members extend automatically when personnel are present on the elevator car, preventing upward movement that compromises maintenance safety.

A gearless elevator car sheave arrangement drives load bearing members through parallel traction surfaces to move the car vertically.

A compact staircase lift uses a foot-pedal and guiding rail to transport users between floors.

A detachable safety kit engages a cable to slow a lift car, while a breakaway canopy prevents injury from falling debris during sudden deceleration.

A traction machine uses a sheave rotation detector to measure rope slip during specific travel segments for elevator performance assessment.

Replacing steel with composite belt-like ropes reduces rope bundle width, allowing drive sheaves to fit between the car and hoistway wall.

Segmented elevator control circuits manage appliance power states to reduce energy consumption while maintaining safety monitoring capabilities.

Shaft copying system replaces mechanical limiters with electrical detection, eliminating calibration needs and standby power consumption.

Distributed elevator controllers exchange emergency messages with propagation counts to stop cars during seismic events without central servers.

Wave guide regions in elevator tension members transmit radio frequency data signals, eliminating separate traveling cables to reduce system cost and imbalance.