ターンスタイル
A mechanical gate consisting of revolving arms, allowing only one person at a time to pass through. Can come in various forms, such as rotating tripod turnstiles (which is what is tagged on Danbooru), waist-height and full-height revolving turnstiles, optical turnstiles, etc. Commonly found at [[fare gate]]s and [[security checkpoint]]s.

h4. External link

* "Wikipedia - Turnstile":[https://en.wikipedia.org/wiki/Turnstile]
turnstile