Patent ID: 7216824
Filing Date: 2007-05-15
Classification: B02C

Abstract:
1. A shredder comprising: right and left stationary side walls arranged with a predetermined interval; front and rear support shafts bridged and fastened over lower portions of front and rear portions in the stationary side walls; front and rear oscillating side walls provided to the support shafts so as to freely oscillate forward and backward and to be opened and closed; connection members bridged and fastened over upper front portions of the right and left stationary side walls; a rotary shaft rotatably bridged over the stationary side walls and having a rotary blade; a stationary blade provided in an inner side of the front oscillating side wall and shredding a material to be treated in cooperation with the rotary blade; and a scraper provided in an inner side of the rear oscillating side wall, wherein the rotary blade includes: an arm-shaped roughly cutting rotary blade; and a finely cutting rotary blade having sawtooth-shaped shredding teeth in an outer periphery, and is positioned between the stationary blade and the scraper, and said front and rear oscillating side walls being provided with bearing members for bearing the intermediate member of the cover member in the state of the front and rear oscillating side walls being opened, and the intermediate member of the cover member being structured so as to be prevented from moving frontward and rearward when the front and rear oscillating side walls are in an upright state, by the bearing member and the front member of the cover member provided in the front oscillating side wall, and the bearing member and the rear member of the cover member provided in the rear oscillating side wall.