| 摘要 |
PURPOSE:To prevent the occurrence of turbulence and to attribute to maintenance of cleanliness of the interior of a room by a method wherein an overhang door is run on rails by means of the drive force of a door engine, and when the door is closed, the overhang door is contained in an opening and positioned approximately flush with a surrounding wall surface. CONSTITUTION:A running mechanism 2 formed with a flange 21, an axle 22, sash rollers 23 and 23, and rails 24 and 24 is mounted to the upper part of an overhang door 1. The overhang door 1 is opened and closed along the rails 24 and 24 by means of the drive force of a door engine 3. When the door is closed, the overhang door 1 is contained in an entrance opening, and the overhand door 1 is positioned approximately flush with a surrounding wall surface on the indoor side. This constitution prevents the occurrence of turbulence to a CRI in a clean room regarding both a direct flow and a horizontal layer flow system, and enable prevention of re-flying of a contaminated material from a floor and walls. |
