SELF-PROPELLED BLASTING APPARATUS

摘要

A self-propelled blasting apparatus for cleaning walls while moving along the corner between two walls meeting at a given angle. This apparatus defines a substantially enclosed space between itself and wall surfaces in such a manner as to encompass the corner between two wall surfaces so that a polishing material can be emitted while the apparatus moves on the two wall surfaces that meet at a predetermined angle. The enclosed space is kept in a vacuum to hold the blasting apparatus on the wall by suction. The apparatus includes wheels perpendicular to the wall on which it is held. When the wheels are driven, the apparatus can move on the wall surface while polishing the wall surface within the enclosed space. The used polishing material and removed dirt are sucked into the space and discharged through a vacuum passage.