Patent ID: 8245346

Claim:
A disc cleaning mechanism which performs scrub cleaning of discs while rotating a rotary shaft on which a plurality of circular plate brushes are mounted and each of the discs is positioned between adjacent brushes, comprising: a hollow rotary shaft; a core roller which is mounted on and which rotates integrally with the rotary shaft and to which a plurality of circular plate brushes are mounted; a rotatable brush unit which includes the core roller and in which the plurality of brushes are mounted and stacked on the core roller via central openings of the brushes; brush cleaner circular plates, each having openings for cleaning the brushes, said plates being respectively inserted between the brushes at positions which do not overlap with positions between the brushes where the respective discs are inserted and are rotated through engagement of the outer circumferences thereof with the core roller; and a cleaner nozzle injecting cleaner liquid for cleaning the discs; and wherein a plurality of lateral grooves are formed around the outer circumference of the core roller along the axial direction of the rotary shaft, each of the grooves communicating with the hollow portion of the rotary shaft, whereby when the brush cleaner circular plates are rotated, the respective openings of the brush cleaner circular plates communicate with the lateral grooves and cleaner liquid fed to the hollow portion in the rotary shaft flows to the openings of the brush cleaner circular plates via the lateral grooves and is discharged from the rotatable brush unit.