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  • - [Jared] As you ride up an escalator,

  • you've seen this view plenty of times.

  • But have you seen this view?

  • or this view?

  • In today's video,

  • I'd like to show you how an escalator works.

  • (upbeat music)

  • It's hard to imagine the modern world without the escalator.

  • It was initially called the revolving stairs.

  • The first idea can be traced back to 1859.

  • But it was a few more decades

  • until we had our first working escalator.

  • Since then society has come

  • to heavily depend on these machines.

  • The escalator is most useful in places

  • where there are large amounts of people to move

  • such as airports, shopping malls and subway systems.

  • Elevators can only move so many people

  • even if there are several of them.

  • But if the same space is used for escalators,

  • we can move a lot more people through.

  • Of course there's usually an elevator nearby,

  • for those that can't use the escalator.

  • You'll usually find at least two escalators

  • alongside each other.

  • One going up and the other going down.

  • They can extend from multiple levels.

  • Sometimes to save space,

  • they'll be arranged in a crisscross pattern.

  • But the layout will change

  • depending on the needs of the place.

  • Some escalators might need to be longer

  • or shorter depending on the height of the next floor.

  • Maybe they'll need to be wider to fit more people,

  • or several escalators

  • might need to be right next to each other.

  • Sometimes stairs are in the middle

  • for those that want to walk.

  • And on some occasions,

  • the escalators will all be pointed in the same direction.

  • This helps when you want to direct

  • the flow of traffic towards the exit.

  • Let's not forget the variations

  • such as the moving sidewalks

  • or even the spiral escalators.

  • Yes, they really do have these.

  • But for this video, let's take a look inside

  • of a regular escalator.

  • (upbeat music)

  • There's a series of individual steps

  • that make up the moving stairs.

  • They have ridges on the top

  • and are sometimes made out of rubber

  • so that they have better grip.

  • The steps are painted yellow around the edge

  • to encourage passengers not to stand too close to the edge.

  • These steps stay flat while they're on top

  • and it's a good thing to.

  • Each step has two wheels on the bottom

  • to guide it as it moves along.

  • Then we have what's called the step chain.

  • This attaches to the top of each step.

  • Now all we need is a track system to guide these wheels.

  • The step chain rolls along the top here

  • and the bottom wheels roll along this track.

  • The positioning of these tracks

  • is what keeps the steps level.

  • Let's just focus on one of the steps as it comes down.

  • You can see what would happened at this bottom wheel

  • was just a little bit higher,

  • the step would no longer be flat.

  • Once we get to the end,

  • the steps flip over and come around the other side.

  • The same thing happens once we get back to the top here.

  • The escalator motor is usually up at the top,

  • it has to move this axle

  • and two big gears that pull the step chain.

  • Now we just connect it with more gears and a roller chain.

  • (upbeat music)

  • Now comes a few more gears.

  • These are connected by another small chain underneath.

  • This is what moves the handrail.

  • It's really important that the handrail

  • move at the exact same speed as the steps.

  • All of these parts are placed inside a strong metal frame

  • which is called the truss.

  • At the top and bottom of the escalator

  • is what we call the comb plate.

  • The steps go right underneath

  • as their ridges fit close together.

  • If the ridges weren't there,

  • it would be much easier for something to get stuck.

  • But either way, just remember that it's never a good idea

  • to play around an escalator.

  • My name is Jared and I love 3D animation.

  • Hit that subscribe button if you want to see more videos

  • just like this one.

  • (upbeat music)

- [Jared] As you ride up an escalator,

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B1 US escalator chain upbeat music upbeat step bottom

How does an Escalator work?

  • 3 2
    joey joey posted on 2021/04/26
Video vocabulary