PLATFORM DOOR ASSEMBLY HAVING AUXILIARY ROLLERS FOR PREVENTING SEPARATION OF PLATFORM DOORS

摘要

PURPOSE: A platform door assembly having auxiliary rollers for preventing separation of platform doors is provided to prevent the platform door from being separated from a door rail by the external force vertically applied. CONSTITUTION: A platform door assembly having auxiliary rollers(30) for preventing separation of platform doors has a horizontal frame(22) fixed to a wall of a building; a door rail(24) longitudinally formed to the front of the horizontal frame; platform doors; and a hanger plates(20) having hanger rollers(21) coming in contact with the top of the door rail and the auxiliary rollers situated to the bottom of the door rail. The auxiliary roller has a separation-preventing unit for preventing the hanger plates from being separated from the door rail toward the opposite side of the frame. The hanger plates are each rotatably supported on a plate body attached to the upper part of the platform door and a surface of the plate body facing the horizontal frame.