Detaching apparatus for the automatic drawing of sheets from a stack of sheets
AssigneeAstes4 SA
InventorRoberto Zaffaroni
Life of this patent
Estimating the term…
Abstract
A detaching method of sheets from a stack of sheets from a stack of sheets and a relative detaching apparatus is disclosed, including at least a gripping head of a handling device of sheets and a nozzle assembly apt to eject an air flow to a lateral edge of a stack of sheets, furthermore including: a storage assembly of pressurised air provided at least with a compressed-air tank equipped with a pressure multiplier and a relative first pressure adjuster; and a high-pressure pipe between the nozzle assembly and the storage assembly intercepted by a fast-opening electrovalve. The nozzle assembly is provided with a nozzle, supplied through the electrovalve, configured as a convergent/divergent spout.
Claims3
A detaching method of a stack of sheets, comprising the steps of:
- providing an apparatus, equipped with at least a gripping head (T) of a sheet handling device, a nozzle assembly (1) configured to eject a substantially horizontal air flow toward a lateral edge of a stack of sheets, a detection unit (14a, 14b) of said sheets (L), and a pressurised-air storage assembly (2) provided with a tank of compressed air (16) that has a pressure multiplier (17) and a relative first pressure adjuster (18), an inlet port of the storage assembly (2) being connected to an air supply line upstream of the pressure multiplier (17), and a high-pressure pipe between the nozzle assembly (1) and the storage assembly (2) intercepted by a fast-opening electrovalve (12), the nozzle assembly including a moving support and a nozzle (5), the moving support provided with a height-adjustable column (4b) driven by an actuator (6), and the nozzle (5) mounted on the height-adjustable column (4b), the nozzle (5) supplied through the fast-opening electrovalve (12);
- lifting a top sheet (L) of said stack of sheets through said gripping head (T) up until a preset height above the stack of sheets;
- arranging said nozzle (5) at said preset height;
- causing a burst of compressed air against a lateral edge of said top sheet (L) through said nozzle (5);
- detecting a thickness of said top sheet (L) through said detection unit (14a) and determining if said thickness is consistent with an expected thickness for said top sheet (L);
- and
- if said detected thickness is not consistent, repeat again said step of causing a burst of compressed air.
A detaching method of a stack of sheets, comprising the steps of:
- providing an apparatus, equipped with at least a gripping head (T) of a sheet handling device, a nozzle assembly (1) configured to eject a substantially horizontal air flow toward a lateral edge of a stack of sheets, a detection unit (14a, 14b) of said sheets (L), and a pressurised-air storage assembly (2) provided with a tank of compressed air (16) that has a pressure multiplier (17) and a relative first pressure adjuster (18), an inlet port of the storage assembly (2) being connected to an air supply line upstream of the pressure multiplier (17), and a high-pressure pipe between the nozzle assembly (1) and the storage assembly (2) intercepted by a fast-opening electrovalve (12), the nozzle assembly including a moving support and a nozzle (5), the moving support provided with a height-adjustable column (4b) driven by an actuator (6), and the nozzle (5) mounted on the height-adjustable column (4b), the nozzle (5) supplied through the fast-opening electrovalve (12), and the fast-opening electrovalve (12) mounted on said height-adjustable column (4b);
- lifting a top sheet (L) of said stack of sheets through said gripping head (T) up until a preset height above the stack of sheets;
- arranging said nozzle (5) at said preset height;
- causing a burst of compressed air against a lateral edge of said top sheet (L) through said nozzle (5);
- detecting a thickness of said top sheet (L) through said detection unit (14a) and determining if said thickness is consistent with an expected thickness for said top sheet (L);
- and
- if said detected thickness is not consistent, repeat again said step of causing a burst of compressed air.
Dependencies are inferred from the claim text.