Patent ID: 7685772

Claim:
A platform door device, comprising: two support members; and two movable fences, which are provided along a side edge of a station platform, each of which is supported movably by a respective one of the support members, and which are adapted to move relative to each other in a longitudinal direction of the platform to open and close a passage between the platform and a car side, wherein the two support members are erected on the platform and are housed in the two movable fences, respectively; each of the support members is arranged in a plane in the thickness direction of a respective one of the movable fences so as to be covered with the movable fence from the outside, whereby the movable fence is moveable relative to the support member, with the inner surface of the movable fence facing the outer surface of the support member; the two support members, each being formed in the shape of a flat plate, are arranged in a direction perpendicular to the side edge of the platform, and are erected from and directly fixed, by welding, to a top surface of a bed plate installed on the platform; a guide rail extending in the travel direction of the movable fences is provided on an upper inner surface of each of the two movable fences; a slide block is installed in an upper end portion of each of the two support members; and the guide rail is slidable on the slide block, whereby the movable fence is moveable relative to the support member.