Abstract: A cover device for a shredding plant, able to cover at least a shredder unit which includes a rotary drum rotatable around its own axis of rotation within a shredding chamber. The cover device includes a plurality of separation means to separate and discharge the materials arriving from shredding. The cover device includes a first element which is pivotable to the frame of the shredding plant, a second element which is pivotable to the first element, and a third element which is pivotable to the first element.