Cover device for a shredding plant

1. A cover device for a shredding plant, able to cover at least a shredder unit comprising a rotary drum able to rotate around its own axis of rotation inside a shredding chamber, said cover device being provided with a plurality of separation means to separate and discharge the materials arriving from shredding, comprising:

a first element, including a first of the plurality of separation means, wherein the first element is connected to and pivotable with respect to a frame of said shredding plant, wherein the first element is rotatable from a first position, in which said first of the plurality of separation means is operative and inaccessible from outside of the first element, to a second position, in which said first of the plurality of separation means is inactive and accessible from outside of the first element;

a second element, including a second of the plurality of separation means, wherein the second element is connected to and pivotable with respect to said first element, wherein the second element is rotatable from a first position, in which said second of the plurality of separation means is operative and inaccessible from outside of the second element, to a second position, in which said second of the plurality of separation means is inactive and accessible from outside of the second element; and

a third element, including a third of the plurality of separation means, wherein the third element is connected to and pivotable with respect to said first element, wherein the third element is rotatable from a first position, in which said third of the plurality of separation means is operative and inaccessible from outside of the third element, to a second position, in which said third of the plurality of separation means is inactive and accessible from outside of the third element.

2. The cover device as in claim 1 , wherein said first element is able to be clamped in the first position by first clamping means associated with the frame of the shredding plant.

3. The cover device as in claim 2 , wherein said first element is provided with second clamping means able to clamp said second element in the first position.

4. The cover device as in claim 3 , wherein said first element is provided with third clamping means able to clamp said third element in the first position.

5. The cover device as in claim 1 , comprising first attachment means able to keep said first element in the second position.

6. The cover device as in claim 5 , comprising second attachment means able to keep said second element in the second position.

7. The cover device as in claim 1 , said wherein said second element and said third element are able to rotate in opposite directions.

8. The cover device as in claim 1 , wherein said first element is able to be selectively associated with said rotary drum by a connection means.

9. The cover device as in claim 8 , wherein said first element is connected to said rotary drum, said rotary drum is able to follow the rotation of the first element from said first position to said second position, and vice versa, and said first element can be removed from and be disposed in said shredding chamber.

10. The cover device as in claim 8 , wherein said connection means comprises housings associated with the rotary drum.

11. The cover device as in claim 10 , wherein each of said housings cooperates with a corresponding plate associated with said first element.

12. The cover device as in claim 11 , wherein each of said housings is shaped so as to define a first hole, and at least two lateral holes,

wherein a rotor shaft of the rotary drum is able to be inserted into the first hole, and

an attachment means is able to be inserted in to the at least two lateral holes, in order to achieve the attachment with said corresponding plate.

13. The cover device as in claim 12 , wherein said central hole and said lateral holes are aligned.