A Gate of a Public Restroom

When I went shopping last Sunday, I passed by a public restroom near the station. I saw a gate of the restroom closing when they were cleaning up. It was the first time that I've seen a gate of the restroom closing. Lucky me!  In Japan, when they clean up, they put a sign board at the entrance of the restroom. Usually, it says "清掃中ですが、ご使用いただけます." It means "We are cleaning up, but you can use the restroom."