Patent ID: 7448568
Filing Date: 2008-11-11
Classification: B02C

Abstract:
1. A shredder comprising: a pair of stationary side walls arranged with a predetermined interval; a rotary shaft rotatably bridged over the stationary side walls and having a rotary blade; a pair of support shafts bridged and fastened over lower end portions of the pair of stationary side walls in parallel with the rotary shaft; pivotable side walls provided on each of the support shafts so as to pivot freely to be opened and closed; a stationary blade provided in an inner side of one of the pivotable side walls and shredding a material to be treated in cooperation with the rotary blade; and a scraper provided in an inner side of the other pivotable side wall, wherein the rotary blade is positioned between the stationary blade and the scraper, and wherein said rotary blade is provided with an arm-shaped roughly cutting rotary blade and a finely cutting rotary blade having sawtooth-shaped shredding teeth in an outer periphery, a cover member for covering a moving locus space of the roughly cutting rotary blade is provided so as to be positioned below the stationary blade and the scraper, said cover member having: a first side member provided in one of the pivotable side walls; a second side member provided in the other pivotable side wall; and an intermediate member connecting the first side member and the second side member, being independent of the first and second side members and detachable from the shredder when said pivotable side walls are opened.