How Escalator Work.

 An escalator is made up of a set of interlocking steps, powered by an electric motor. A pair of chains looped around two pairs of gears rotate to move the steps along while a larger metal structure called a truss encases the entire mechanism to connect the floors. The steps then move about like a conveyer belt, entering into a special guide system at the top and bottom of the truss to create a level platform for passengers to board or exit.

UNDERSTANDING THE PARTS OF AN ESCALATOR

Similar to elevators, escalators operate most efficiently when each individual part is up to code and in excellent working condition. Though parts may vary depending on the make and model, most escalators consist of these components:

ESCALATOR SAFETY MECHANISMS

Inlet guards

Operating panel

Safety switches

Step switches 

TOP AND BOTTOM PITS

Control panel

Drive unit

Main Gear

Drive chain

Sprocket (top)

Safety switches

TRUSS

Main track

Trailing track

Moving handrail drive unit

Sprocket (bottom)

Moving handrail drive chain

Inlet guard 

BALUSTRADE

Moving handrail

Interior panel

Deck board

Skirt guard

STEPS

Step tread

Riser

Step demarcation line

Driving roller/trailing roller

Step chain