What does "to fill my days of rise and fall" mean?

Question

I have several questions about the sentence in bold from the novel The Fire-Eaters by David Almond.

And she took my hand and hurried me forward. “Come on!” she said. “Let's ride a lift up to the sky!” The lift was inside the stone column of the bridge. We stood in the shade of the bridge's great steel arch. I spread my hands across its huge rivets. Traffic roared high above us. Nearby, a herring gull ripped at something bloody in a brown paper sack. A river bell rang, a distant ship hooted.

When the lift came down, there was a little man inside sitting on a stool.

“Come in, madam,” he called. “And you, young sir!”

He pressed his buttons and pulled his levers. I saw how he couldn't keep his eyes off her as we shuddered up toward the sky. On a shelf at his side were a Thermos flask, a sandwich box, and a notebook and a pen. He saw me looking.

“I keep a note of everyone,” he said. His eyes sparkled. “All my customers. Just for memory's sake.”

I wanted to reach out, lift the book, look inside, and he knew it.

“Ah, to you it would be simply boring,” he said. “It's nothing but dates and descriptions and weather reports.” He shrugged. “I must do something to fill my days of rise and fall, rise and fall, rise and fall.”

He took the coin she handed him and opened the door with a flourish.

“Here we are, then. Farewell, madam. Farewell, young sir!”

We stepped out onto the platform of the bridge. As the doors closed, he was already writing.

“Beautiful bright lady,” I heard him say. “All dressed in red. Her quiet boy. September 2nd, 1962. Sunshine after rain.”

The lift door closed. [...]

Below is the sentence about which I have several questions about.

"He shrugged. “I must do something to fill my days of rise and fall, rise and fall, rise and fall.”"

1. Does the word "fill" mean "to make (something) full"?
2. Does the word "of" have the same meaning as the word "with" in the phrase "fill a glass with water"?
3. Does the word "rise" in "to fill my days of rise and fall" mean "the achievement of importance, success or power"?
4. Does the word "fall" in "to fill my days of rise and fall" mean "a situation in which someone or something loses their position of power or becomes unsuccessful"?

Thanks a lot for everyone's help in advance.

Answer 1

He's an elevator operator: his days consist literally of nothing but going up and down—rising and falling. They are therefore "days of rise and fall". That's very boring, so he needs something to "fill" his days and keep them from being wholly monotonous; so he writes in his notebook everything that is not just rise and fall, rise and fall.

Answer 2

3) Does the word "rise" in "to fill my days of rise and fall" mean "the achievement of importance, success or power"?

4) Does the word "fall" in "to fill my days of rise and fall" mean "a situation in which someone or something loses their position of power or becomes unsuccessful"?

Yes: "Rise and fall" is often used like that.

No: However, the elevator operator's job is very boring. It is very monotonous. Nothing much happens.

The author is using irony:

irony http://www.oxforddictionaries.com/definition/english/irony

The expression of one’s meaning by using language that normally signifies the opposite, typically for humorous or emphatic effect: ‘Don’t go overboard with the gratitude,’ he rejoined with heavy irony

Answer 3

To answer your 3rd and 4th question. He is an elevator manager so he literally means he goes up then down throughout the day.

Now to your first question he says 'fill', to mean, he writes about his day to make his job more interesting, (because he has a boring job).

Now the second question, He says of in the context of what he does throughout the day, so he says;

...to fill my days of rising and falling (which he had already expressed that that was boring.)

So he is expressing that he writes in his notebook to fill his (boring) day of going up and down* over and over.