Tripod / turnstile models are space efficient security barriers, used for the opening and closing of personnel exits and entrances, such as canteens, hotels, office buildings, museums, stadiums, clubs, subways, stations, terminals, tourist attractions and other places. The movement of the three-stick turning machine has an automatic adjustment hydraulic shock absorber. When tripod turnstile is used, the sound is small, no impact, and the brake lever automatically decelerates back.