A RAILWAY CAR DOOR ASSISTANCE LOCKING DEVICE HAS A SECRET FUNCTION

摘要

PURPOSE: A secondary door locking device for a railway vehicle is provided to prevent noise of a door due to pressure waves generated in the tunnel entry or high speed turnout and to prevent a tinnitus phenomenon due to pressure difference between inside and outside of the door. CONSTITUTION: A secondary locking device(100) is comprised of housing(110), a feed guidance member(120), and a feed member(130). The housing is installed around a door. A first installation hole and a second installation hole are formed on both sides of the housing on the same axis. The feed guidance member is combined with the first installation hole through the second installation hole. A lead screw is formed at one side of the feed guidance member. A fixing part is formed on the other side of the feed guidance member for fixing the second installation hole. The feed guidance member forms a lock head for helping rotation in a clockwise direction or a counter clock-wise direction. The feed member is combined with the lead screw and moves back and forth through a rotation motion of the feed guidance member.