How does the escalator works?

Answer 1

Escalators work like conveyor belts, moving sidewalks at airports and bicycle chains. Instead of moving things or people across flat surfaces, escalators lift or lower their cargo from one height to another.

A drive pulley, a connecting loop and an end pulley are the 3 elements of an escalator. The pulleys are often 4 feet wide and the loop is composed of 4-foot wide interlinking steps which flow under the people riding on them at the end pulley. Then the steps return in the opposite direction to the drive pulley. Try it with 2 pencils and a rubber band.