Length adjusting mechanism of slitter rewinder

A length adjusting mechanism of slitter rewinder, the slitter rewinder (100) comprising:

• a feeding device (10), a slitting device (20), a rewinding device (30) and a control device (40);
• wherein the feeding device (10) is configured for installation and transmission of rolls of material, the slitting device (20) is disposed next to the feeding device (10) and configured for slitting rolls of material transmitted by the feeding device (10) into strips, the rewinding device (30) is disposed next to the slitting device (20) and configured for rewinding the strips of material, and the control device (40) is a programmable logical controller electrically connected with the feeding device (10), slitting device (20) and rewinding device (30);
• the rewinding device (30) includes a substrate (1), a plurality of rail groups (2) mounted on the substrate (1) and a plurality of rewinding groups (3) on the substrate (1) and corresponding to the rail groups (2);
• wherein the slitting device (20) and the rewinding device (30) have a length adjusting device (50) disposed therebetween;
• the length adjusting device (50) comprises a mount (4) and an adjusting unit (5) fixed on the mount (4);
• the adjusting unit (5) is configured for adjusting the strips of material so that they can arrive at the corresponding rewinding group (3) at the same time and the adjusting unit (5) comprises at least a group of guide rolls (51);
• each group of guide rolls (51) comprises of two parallel primary guide rolls (511) and at least one secondary guide roll (512) between the two primary guide rolls (511) and below the two primary guide rolls (511).