| 摘要 |
In a process for directing the flow of visitors, people may move along a passage (1) in one direction only. The passage (1) comprises at least one door (4) the motor-driven leaves (5) of which can be set in motion by means of sensors (8, 9, 9') arranged in the passage (1). The leaves (5) are essentially held in a position which keeps the passage (1) open and close the passage only when someone approaches the door (4) in the direction counter to the authorized direction along the passage. An alarm system may emit optical or acoustical signals before the door closes. |
