As an electrically powered transportation device, escalators maintain their mechanical standby attribute even when stationary, unlike the physical structure of fixed stairs. According to the national standard GB 16899-2011, escalators must be equipped with safety components such as anti-reverse devices and additional brakes to ensure the stability of the conveyor belt during operation.
The structure of an escalator mainly includes key components such as the step system, handrail system, drive system, and safety protection system. The step system, consisting of steps, treads, risers, and connecting chains, is responsible for carrying passengers. The handrail system, including skirt panels, wall panels, and movable handrail belts, provides support and protection. The drive system, composed of a motor, reducer, and brakes, ensures the operation of the equipment. The safety protection system includes components such as anti-reverse devices and additional brakes to comply with national safety standards.