【臺詞】Do You Know S1-22 Escalator and Wheelbarrow

【臺詞】Do You Know S1-22 Escalator and Wheelbarrow

Do You Know S1-22a Escalator1人有 · 書評1 Do You Know S1-22a Escalator

Do You Know S1-22b Wheelbarrow1人有 · 書評1 Do You Know S1-22b Wheelbarrow

Hello, I'm Maddie, and today I'm out

and about doing some shopping.

Do you like to go shopping?

This shopping centre is full of

shops, but some of them are

on the floor below and some of them

are on the floor above.

And there's a clever way to help

people get up and down.

Do you know what this is?

That's right, it's an escalator.

A moving set of stairs.

But do you know how an

escalator works?

Let's find out.

Have you ever been on an escalator?

I'm going to take this one to

the floor below.

To get on an escalator safely, you

have to wait for a step to appear,

hold on to the handrail and then

quickly step on.

Let's go.

Now, can you see that I'm stood

still, but I'm somehow moving?

That's because the escalator

is moving downwards and

it's carrying me to the floor below.

You should never play on

an escalator,

but I've got special permission

to take a closer look.

Can you see how the steps

just disappear here at this metal,

yellow edge? It looks a bit like

a comb, doesn't it?

The steps go underneath and

disappear, but

where do they go and

where do the steps come from?

Well, to find out, we need to look

inside and underneath an escalator.

Inside an escalator, the stairs are

linked together in one big loop.

It moves round and round.

The stairs are attached to two sets

of wheels called gears,

one at the top,

and one at the bottom.

The gears at the top of

the escalator

are pulled round by chains.

They look a bit like a bike chain.

The gears at the bottom run along

a track, like a train.

TRAIN HORN

The gears have teeth on them,

and when they turn,

they pull the loop of stairs

around with them.

Each step has small wheels on it.

When a step reaches the top,

the chain pulls the wheels around

the gear until the step is

flat again.

It stays flat until it gets all the

way back to the bottom,

ready to go around again.

Aren't escalators interesting?

This is an escalator workshop and

we've got special permission

to be here, so that we can see what

the underneath of a real-life,

working escalator looks like.

I'm going to use my special camera

and light to look underneath

the escalator and see what

we can find.

Let's start by reminding ourselves

what the steps actually look like.

The curved bit is the side of the

step and then the flat bit is

the top, but now, let's

move underneath.

This escalator is switched off, so I

can safely put my camera underneath.

Here, you can see the underside of

the steps that you stand on.

Can you see the curved side and

the flat bit on top?

And if we can see even further

underneath, right here,

that is where the steps are lying

flat, ready to make their way

back to the gear to be

looped around.

So, we need to see the gear,

don't we?

And this is the gear at the

top of the escalator.

It looks a bit like

a giant bike chain, doesn't it?

This escalator is set to

move people downwards,

so the gear will pull the steps

all the way round from their

flat position underneath to their

shape as a step we can stand on.

I want to see what this escalator

looks like when it's working,

so I'm going to put two special

cameras underneath

and then we can turn it on.

Let's go.

The first one will help us see the

underside of the stairs

as they move along.

The second camera will help us see

the big gear at the top in action.

Right, the cameras are in place,

I'm stood well away

from the escalator, so it's time

to turn it on.

MECHANICAL RUMBLE

Whoa! And there it goes.

Did you hear that?

That was the sound of the gear

kicking into action and

it's beginning to pull the steps

round - but I think it sounds

a bit like a spaceship taking off.

MOTOR WHIRS

So, you can see how the steps are

being spun around the gear.

They start off flat and then they

unfold and become

the shape of a step.

Escalators can go in two

directions - they can go down

or they can go up.

This escalator is going down, but

shall we see it move the other way?

RUMBLING STOPS

RUMBLING RESUMES

There's the sound of the

spaceship again.

So, this time,

the steps are moving upwards.

This time, they start as a step and

then they get pulled round the

gear and they move all the way down,

underneath the escalator,

to the gear at the bottom.

Amazing!

What was your favourite bit about

seeing how an escalator worked?

Do you remember what you call the

two big wheels that

pulled the steps around?

That's right, they're

called gears.

Did you hear the sound of the gears

made when they started moving?

MECHANICAL RUMBLE

And did you see the way the steps

get flipped upside down

and turned to the right way up when

they come back round the loop again?

So, the next time you see an

escalator like this or go on

one yourself, you'll

know just how it works

and what's going on underneath.

Escalators are great for helping

us move up and down inside

a building, but, sometimes,

we need to move heavy things around.

There's something really

useful that helps us to move

things around outside.

Do you know what it is?

That's right, it's a wheelbarrow.

Wheelbarrows have a

great big wheel at the front,

two handles and a

large container called a pan.

It makes it really easy for

me to move all of this

from one place to another.

And then, when I'm ready,

I can tip up the wheelbarrow

and pour it all out.

Wheelbarrows are really useful,

but do you know how they're made?

Let's find out.

This is a wheelbarrow factory and

inside are a lot of robots.

All these robots are making

different parts of a wheelbarrow.

It's like they're doing some

kind of dance, isn't it?

But not everything is

made by robots.

People and robots have

to work together.

When a wheelbarrow is made,

it starts off like this,

as a sheet of metal called steel.

Steel is really strong and it's used

to make all sorts of things -

like bridges, cars,

even pots and pans.

First, the sheet of steel is

fed into this machine.

CLANGING

A huge weight presses down on the

sheet and folds it around a mould.

When the metal comes

out at the other end,

it's starting to look

a little bit like a wheelbarrow.

And now, it's time for the robots.

This robot picks up the pan and

passes it to another machine.

It cuts around the side of the pan.

The robot then collects the

bits that are left over.

It's a little bit like the

bits of leftover pastry

from when you use a pastry cutter.

I love all these yellow robots and

watching the way they cut

the metal pan and swing it to

the next machine.

They know exactly when to pick

it up and where to put it.

The pan is put in this machine,

which makes four holes in it.

These holes will be used to attach

the wheels and handlebars later on.

In here are lots of long poles.

They're made of steel, too,

and they're going to become the

wheelbarrows' handles.

But how does something long and

straight become two handles?

LOUD METALLIC CLANGING

Well, that's thanks to some

more robots.

And they're very noisy!

CLANGING CONTINUES

The first robot bends the

ends of the pole

to make a small, curved shape.

Then it bends the whole thing in

the middle to make a larger curve.

And you end up

with something like this.

It's a funny shape, isn't it?

But if you hold it in

this position,

you can see it's a pair

of handlebars.

I'm going to put one of my

special cameras on the robot

to see what it's like when

it's working.

Here goes.

The robot is programmed like a

computer to know exactly what to do.

Look how that robot arm picks

up the handle and knows

exactly where to put it.

Let's see what happens next.

To connect all the bits of our

wheelbarrow together,

we need to use these.

They're called fittings

and they help fit things together,

but we need to attach these to

our handlebars.

Come with me and I'll show you

how they do it.

FIZZING AND CRACKLING

Whoa!

This is called welding and it's

a special way of attaching

two pieces of metal together.

That white spark is really,

really hot and it melts the metal,

so that they glue to one another.

Woo!

With all those sparks flying around,

I have to stand well back.

Look how bright that is!

Can you see the sparkles?

It's like a firework.

It sounds like a firework too,

doesn't it?

FIZZING AND CRACKLING

It's time for the finishing touches

and the wheelbarrow handles

are going to be given

a coat of paint inside this machine.

And here they are,

coming out the other side.

They've been sprayed with

a powdered, grey paint,

But before it's finished,

they go into the oven.

The oven bakes the paint

so it goes shiny.

Here they come.

Don't they look shiny and new?

Ready to be fitted together.

But we're still missing one thing.

Can you guess what all these

wheelbarrows are missing?

It's a wheel and it needs to be

fixed to the wheelbarrow.

Let's see how it's done.

The handlebars are fixed to the

pan by putting bolt through

the holes that the robot

made earlier.

Next, the wheel is attached

using a fitting.

RATTLING

And there we have it -

a brand-new, shiny wheelbarrow.

What was your favourite bit about

seeing how a wheelbarrow was made?

Do you remember what you call the

metal that the wheelbarrow

was made from?

That's right, it's steel.

Did you hear the sound that the

welding made?

FIZZING AND CRACKLING

And did you see my special camera

when I put it on the robot?

We got to see everything the robot

sees when it's busy working.

So, the next time you see

a wheelbarrow,

you'll know just how it's made.

And when you go on an escalator,

you'll know how it works and

how it carries people from

one place to another.

Right, I'm off to do some gardening,

so from me and the robots...

ELECTRICAL WHIR

See you next time.