| 摘要 |
A packing unit and method for folding a blank on a packing machine; the packing unit having: a packing conveyor having at least one pocket for receiving the blank; and a feed device for inserting the blank into the pocket on the packing conveyor; the packing conveyor has at least a first conveyor belt defining a bottom wall, of the pocket; at least a second conveyor belt separate from, parallel to, and alongside the first conveyor belt, and defining the bottom wall of the pocket together with the first conveyor belt; a first retaining member, which projects perpendicularly from the first conveyor belt and defines a front wall of the pocket; and a second retaining member, which projects perpendicularly from the second. conveyor belt and defines a rear wall of the pocket. |
| 主权项 |
1) A packing unit (10) for folding a blank (4) on a packing machine (1); the packing unit (10) comprising:
a packing conveyor (17) having at least one pocket (18) for receiving the blank (4); and a feed device (19) for inserting the blank (4) into the pocket (18) on the packing conveyor (17); wherein the packing conveyor (17) comprises: at least a first conveyor belt (23), and at least a second conveyor be (24) separate from, parallel to, and alongside the first conveyor belt (23), said first and second (24) conveyor belts defining a bottom wall of the pocket (18); a first retaining member (25), which projects perpendicularly from the first conveyor belt and defines a front wall of the pocket (18) in the direction of the packing path (P); and a second retaining member (26), which projects perpendicularly from the second conveyor belt and defines a rear wall of the pocket (18) in the direction of the packing path (P); and wherein the distance between said first retaining member (25) and said second. retaining member (26) in the direction of the packing path (P) defines the length (L) of said pocket (18); the packing unit (10) being characterized in that the feed device (19) comprises: a first suction pickup head (21), which engages a first panel (11) of the blank (4) inside a store (20); a second suction pickup head (22), which engages a second panel (13) of the blank (4) inside the store (20); and actuating devices (33, 34) for moving the pickup heads (21, 22) from a withdrawal position at the store (20) to a release position at the packing conveyor (17), to insert the blank (4) inside the pocket (18) on the packing conveyor (17), and then release the blank (4), folded into a ‘U’, inside the pocket (18) on the packing conveyor (17); wherein said length (L) is variable according to the format of said blank (4) ; and wherein said actuating devices (33, 34) alters the distance between said pickup heads (21, 22) and said packing unit at said store (20) according to the format of said blank (4). |
