Device for stacking sheets of paper or similar

A device (10), for stacking sheets (40) of sheets arranged to form a stack (4) downstream of a sheet cutting line, the stacking device (10) comprising:

• a cutter outfeed conveyor (3) arranged to pass the sheets (40) cut by the cutter (6), one by one, towards a stacking table (20) communicating with a stack evacuation conveyor (5) located below the cutter outfeed conveyor (3) so that, once the stack is formed, at least one complete stack (4) of sheets (40) can be transferred from the stacking table (20) to the stack evacuation conveyor (5),
• the stacking table (20) being fixed and located in a same plane as the stack evacuation conveyor (5) and the stacking device (10) including an unloading conveyor (7) comprising a first end (70) and a second end (71) that respectively communicate with the cutting outfeed conveyor (3) and the stacking table (20),
• the unloading conveyor (7) being arranged to transfer the sheets (40), one by one, from the cutter outfeed conveyor (3) towards the stacking table (20) and being coupled with driving mechanism arranged to move the second end (71) between a low position in which, when the first sheet of the stack (4) is conveyed, the second end (71) is located at the level closely adjacent the stacking table (20) and a high position in which, when a last sheet of the stack (4) is conveyed, the second end (71) is located closely adjacent a height corresponding to that of the complete stack (4),
• wherein the first end (70) of the unloading conveyor (7) is mounted on at a second supporting structure (12) while the second end (71) of the unloading conveyor (7) is mounted on a first supporting structure (11), each of the first and the second supporting structures (11, 12) comprises a plurality of belts (72), and each belt (72) of the first and the second supporting structures (11, 12) extends parallel to one another and has a fixed and invariable length, the second supporting structure (12) of the first end (70) is assembled with the first supporting structure (11) of the second end (71) by a sliding connection which is parallel to the plane of the unloading conveyor (7 in order to create a telescopic unloading conveyor (7) for adjusting the relative spacing of the first end (70) and the second end (71).

A stacking device (10), for stacking sheets (40) of paper or similar items arranged to form stacks (4) downstream of a sheet cutting line, the stacking device (10) comprising:

• a cutter outfeed conveyor (3) arranged to bring the sheets (40) cut by the cutter (6), one by one, towards a stacking table (20) arranged to communicate with a stack evacuation conveyor (5) located below the cutter outfeed conveyor (3) so that, once the stack is formed, at least one complete stack (4) of sheets (40) can be transferred from the stacking table (20) to the stack evacuation conveyor (5),
• the stacking table (20) being fixed and located in a same plane as the stack evacuation conveyor (5) and the stacking device (10) including an unloading conveyor (7) comprising a first end (70) communicating with the cutting outfeed conveyor (3) and a second end (71) communicating with the stacking table (20),
• the unloading conveyor (7) being arranged to transfer the sheets (40), one by one, from the cutter outfeed conveyor (3) towards the stacking table (20) and being coupled with a driver arranged to move the second end (71) between a low position in which, when the first sheet of a stack (4) is conveyed, the second end (71) is located at the level of the stacking table (20) and a high position in which, when the last sheet of the stack (4) is conveyed, the second end (71) is located at a height corresponding to that of the complete stack (4),
• wherein the first end (70) of the unloading conveyor (7) is mounted on a second supporting structure (12) while the second end (71) of the unloading conveyor (7) is on a first supporting structure (11), each of the first and the second supporting structures (11, 12) comprises a plurality of spaced apart parallel belts (72), and each of the plurality of parallel belt (72) of the first and the second supporting structures (11, 12) having a fixed and constant length, the second supporting structure (12) of the first end (70) is assembled with the first supporting structure (11) of the second end (71), by a sliding connection, so that the first end (70) and the second end (71) are movable relative to one another, parallel to the plane of the unloading conveyor (7), in order to create a telescopic unloading conveyor (7) for adjusting the relative spacing of the first end (70) and the second end (71) with respect to one another and adjust a length of the unloading conveyor (7).