To provide an inexpensive device of a simple structure capable of more efficiently washing a floor surface especially at the lower part of a seat with less work burdens relating to the device for washing the floor surface of a bus or a passenger train with a rotary brush while supplying water containing detergent.
In this floor surface washing device of a vehicle in which the rotary brush 35 for rubbing the floor surface is mounted to the front part of a truck 1 provided with an operation handle 7 on a rear part through a brush plate 27 vertically movable by an elevating and lowering device 39, a guide means 26 for guiding the brush plate 27 freely movably in the left and right directions of the truck 1 and a back-and-forth driving means for moving the brush plate 27 back and forth along the guide means 26 are provided. At the time of washing the floor surface at the lower part of the seat, the back-and- forth driving means is driven by operating a switch and the washing device is moved along the seat in the state of moving the brush plate 27 to a seat side along the guide means 26.
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