FLOOR STRUCTURE FOR ORBITAL TROLLEY, FLOOR COMPONENT AND FLOOR UNIT FOR FORMING FLOOR STRUCTURE AND RETURNING SYSTEM FURNISHED WITH FLOOR STRUCTURE

摘要

PURPOSE: A returning system is provided to form a floor structure for an orbit trolley easily installing the rail of the trolley on a grating floor. CONSTITUTION: A returning system equips a returning vehicle(8) as an orbit trolley, a housing(9) and a control board(14). The housing surrounds the whole traveling area of the returning vehicle. The front face and the rear face of the housing are formed with a transparent plate made from resin or glass, to show the outside the position or the operating state. Also, the housing is structured with plural house units vertically connected to each other. A fan filter unit(11) as a cleaner is arranged on the ceiling of each house unit and a fan filter unit equips a fan and a filter and cleans air to discharges cleaned air to the housing. Cleanness of the housing keeps cleaner than the outside's by the fan filter unit.