Apparatus for exchanging paper rolls

An apparatus for exchanging paper rolls, comprising:

• a paper supply mechanism including a first-roll hanger assembly having an inclined arm and a clamp assembly, the inclined arm having a free end and a positioning end fixed to a machine frame, a recess being formed on the positioning end forms a first roll hanger to receive and support a first paper roll therein;
• a second-roll hanger assembly arranged at a position above the first-roll hanger assembly and spaced from the first-roll hanger assembly in a vertical direction, including a second paper roll hanger to receive and support a second paper roll thereon;
• a slide rail extending vertically from the first-roll hanger assembly to the second-roll hanger assembly, a feeding position being defined at a bottom end of the slide rail adjacent to the first-roll hanger assembly, a pick-up position being defined at a top end of the slide rail adjacent to the second-roll hanger assembly, and a standby position being defined between the feeding position and the pick-up position;
• an elevating assembly movably mounted to the slide rail and including an elevating hanger;
• and
• a driving assembly coupled to the elevating assembly and operable to drive the elevating assembly to move upward or downward along the slide rail in the vertical direction to one of the feeding position, the pick-up position and the standby position;
• wherein the elevating assembly is driven by the driving assembly to reach the pick-up position to pick up the second paper roll from the second-roll hanger assembly, and then moves along the slide rail to the standby position;
• and to exchange the first paper roll with the second paper roll, an ejecting part of the clamp assembly of the first-roll hanger assembly ejects and pushes the first paper roll out of the recess, and then the elevating assembly moves downward along the slide rail from the standby position to the feeding position to place the second paper roll into the recess of the inclined arm.