Elevators TRIZ Cases

A modular four-linkage locking mechanism supports clamping and expanding vanes, cutting elevator door retrofit time and assembly cost.

A convertible platform inside the elevator car enables safe access to roof components through controlled maintenance positions without entering the hoistway.

Relocating the brake, drive, and operation mechanisms into the lower frame preserves car room space and reduces braking force and exposure.

A mechanically actuated retractable apron prevents bottom-of-hoistway contact, reducing noise and wear in shallow-pit elevators.

Conductive load-bearing elevator ropes deliver continuous power to the counterweight for reliable electrical overspeed detection and safety gear activation.

Stored final limit zone data and Hall-based car positioning replace shaft hardware adjustment, improving stop accuracy and avoiding buffer collisions.

A sensor-equipped robot automates elevator shaft mapping and ride-quality inspection, cutting manual effort while improving precision and safety.

An automatic retractable apron prevents hoistway bottom contact at the lowest landing, cutting elevator noise and apron wear.

After seismic events, sensor checks on rope tension, car emptiness, and drive access help return elevators to service safely and faster.

A door-jamb-mounted PCBA lets technicians access brake relays and control circuits from the landing instead of climbing onto the elevator car roof.

A staged maintenance mode and convertible in-car platform let mechanics reach roof components without entering the hoistway.

Water-belt load simulation and tilt-aware sensing improve elevator ride quality measurement accuracy while reducing manual handling.

A resistive network encoder and controlled current sources help escalators suppress cable noise and pinpoint protective switch state changes.

A robotic transporter and beam climber move elevator cars in and out of the shaft, increasing parking capacity beyond one car per shaft.

Building acceleration and predicted car position are combined to detect excessive elevator rope sway early and avoid unnecessary service interruptions.

Angle-controlled liner sections increase groove friction to prevent slipping and wear while simplifying elevator sheave installation and replacement.

A floor-fixed U-shaped bracket aligns elevator guide rails at the shaft door while improving installer safety and shaft space use.

Automatic shaft door unlocking at predefined car positions reduces technician risk during elevator maintenance and repair mode.

A single touch elevator panel switches between direction and destination call modes to fit building needs while cutting installation complexity and cost.

Future sheave groove wear is predicted from rope tension, slip, and sheave hardness to support timely elevator maintenance.

Modular sheave liner segments lock to the sheave with concave-convex engagement, simplifying replacement while maintaining traction and reducing downtime.

By correlating drive fault data with safety chain timing, the control device separates chain breaks from drive faults for faster elevator diagnosis.

When a safety switch stops the car near a landing, an unlocking zone permits door opening for passenger exit within a defined misalignment range.

Controlled pre-tensioning equalizes tension-member elongation in elevator suspension members to prevent twisting, misalignment, and tracking issues.

Controlled permanent-magnet and electromagnet braking on the guide rail prevents elevator car sag and bounce from stretched belts or ropes.

Remote authentication lets authorized staff override elevator safety contacts and restore car movement faster after an emergency stop.

Modular liner segments with matching concave-convex engagement improve sheave grip while simplifying elevator liner installation and replacement.

A controlled motor torque offsets elevator unbalance and friction so degraded hoist brakes can be detected with more accurate test loading.

Rope segment bending counts are added to elevator group call allocation to balance wear, extend rope life, and avoid premature replacement.

MOSFET-based brake circuit testing verifies elevator safety actuators during motion without relay noise or service interruption.

3D spatial analysis separates real objects from reflections in elevator sensor data, improving passenger, door, and lobby detection.

Motor torque and rotation limits stop traction sheave elevator stall tests before rope slip damages coated ropes.

A roof-mounted spacer and sensor create a safe gap between dual elevator cars, enabling underside maintenance without temporary platforms.

Redundant wireless paths let elevator controllers switch on signal quality, avoiding traveling cables while maintaining communication integrity.

Stored shaft-equipment images help locate the elevator car after restart, while repeated comparisons improve reliability without prior position data.

The electromagnetic member’s current trajectory reveals braking time, giving engineers a non-disassembly way to assess elevator brake degradation.

3D depth sensing and clustering track passenger groups beyond manual calls, helping assign elevator cars and reduce wait times.

Buffers connected to elevator support elements combine car cushioning with vibration damping for shallow-pit and pitless installations.

Manual dispatch delays elevator rescue; a remote service system verifies the correct elevator and enables secure control for immediate operation.

A retroreflective door-frame surface lets one monitoring unit detect elevator-door obstacles through angle-resolved light sensing, reducing wiring.

A pulley and tension member redirect manual force to unlock elevator landing doors more quickly in shaft pits.

Electromagnetic blocks clamp the guide rail while integrated dampers absorb vibration, limiting elevator-car sinking and floating during loading.

Distance and time checks validate remote elevator requests without GPS or Bluetooth, filtering nuisance calls and reducing energy use.

Adjusting screws and guide rollers align repositioning tracks so multiple elevator cars can transfer between shafts despite installation tolerances.

Varying-density cable segments balance elevator mass, preserving traction while reducing frame moments and roller pressure.