| 摘要 |
PURPOSE: A folding door is provided to improve safety, prevent noise by the removal of a floor threshold, and make better use of a space. CONSTITUTION: A folding door comprises a door frame(1), a door housing(3), a seating projection, a detection sensor, an upper rail, a lower rail, and an incombustible soundproof material. The door frame is buried under a concrete wall. The door housing accepts a multi-stage door in a folder manner. The seating projection and the detection sensor are mounted in the seating groove. The upper rail and the lower rail guide the horizontal and linear reciprocating motion. The incombustible soundproof material is formed on both sides of the door. |
