Sheet supply device and sheet supply method

A sheet supply device for sequentially supplying a sheet from a plurality of rolls around which the sheet is wound, the sheet supply device comprising:

• a rotation member that is rotatably supported about a predetermined rotation shaft;
• a plurality of support shafts that are each provided at positions away from the rotation shaft of the rotation member in a direction orthogonal to the rotation shaft and support the rolls at center positions thereof;
• and
• a joining mechanism that joins a sheet of a standby side roll different from a supply side roll to a sheet of the supply side roll which is supplying the sheet among the rolls supported by the support shafts,
• wherein the rotation member is rotatably supported between a state in which one support shaft is disposed at a mounting position where a new roll is mounted, and a state in which the one support shaft is disposed at a splice position where the standby side roll is supported when the joining mechanism joins the sheets,
• the joining mechanism includes a pressing roller that presses the sheet of the supply side roll against an outer peripheral surface of the standby side roll and a moving unit that supports the pressing roller such that the pressing roller is configured to approach and move away from the standby side roll supported by the one support shaft disposed at the splice position in a radial direction of the standby side roll, and
• the moving unit supports the pressing roller such that a center of the pressing roller is movable on a straight line passing through a center of the rotation shaft and a center of the one support shaft disposed at the splice position.