Patent ID: 7681278

Claim:
A floor cleaning apparatus which cleans a floor, the apparatus comprising: an apparatus main body, which has wheels and is configured to run on the floor; an electrolysis device, which is mounted in the apparatus main body and electrolyzes a cleaning water to alkaline water and acid water; a pressurizing pump, which is mounted in the apparatus main body, and sucks and pressurizes the alkaline water or acid water obtained by electrolysis from the electrolysis device; a spray nozzle mechanism, which is mounted in a front portion of the apparatus main body, and sprays the cleaning water comprising the alkaline water or acid water pressurized by the pressurizing pump on the floor; a suction mechanism, which is mounted behind the spray nozzle mechanism in the apparatus main body, has a suction nozzle that is opened to the floor, and sucks the cleaning water sprayed on the floor together with a contaminant; and a reservoir tank, which is mounted in the apparatus main body and stores the cleaning water sucked by the suction mechanism together with the contaminant, wherein said spray nozzle mechanism comprises: a rotary body rotated by a motor; a rotary arm which reciprocates in association with the rotary body; a linear guide which extends across the front portion of the apparatus main body in a width direction thereof; a support member which is supported by the linear guide and linearly reciprocates in the width direction of the apparatus main body; and a single spray nozzle which is fixed to the support member, linearly reciprocates in the width direction of the apparatus main body across substantially the entire width of the main body while keeping a fixed distance from the floor, and sprays the cleaning water on the floor.