Sheet-feeding system and sheet-feeding method

A sheet-feeding system for continuously feeding a sheet, the sheet-feeding system comprising:

• a roll holding part configured such that a first original sheet roll and a second original sheet roll around which sheets are respectively wound are held in a rotatable state thus enabling feeding of the sheets;
• a joining part having a first temporarily holding part which temporarily holds an end portion of the sheet of the second original sheet roll for joining the end portion of the sheet of the second original sheet roll to a middle portion of the sheet of the first original sheet roll, and a second temporarily holding part which is separated from the first temporarily holding part and temporarily holds a sheet of the first original sheet roll for joining an end portion of the sheet of the first original sheet roll to a middle portion of the sheet of the second original sheet roll;
• a remaining sheet amount detection unit for detecting remaining amounts of the sheets on the first original sheet roll and the second original sheet roll respectively,
• a sheet conveyance unit having a holding part capable of holding the sheets on the first original sheet roll and the second original sheet roll, and a moving mechanism capable of moving the holding part within a region including the first temporarily holding part and the second temporarily holding part;
• a controller for controlling the sheet conveyance unit such that when a sheet joining condition is established where a remaining amount of the sheet of one original sheet roll out of the first original sheet roll and the second original sheet roll becomes equal to or less than a predetermined remaining sheet amount, an end portion of the sheet of the other original sheet roll is conveyed to the first temporarily holding part or the second temporarily holding part in a state where the end portion of the sheet of the other original sheet roll is held by the holding part;
• a nozzle part for discharging an adhesive agent for joining the sheet of the first original sheet roll and the sheet of the second original sheet roll to each other;
• a discharge mechanism capable of discharging the adhesive agent through the nozzle part;
• and
• a nozzle moving unit for supporting the nozzle part such that the nozzle part is made movable within a region including the first temporarily holding part and the second temporarily holding part, wherein
• the controller is configured to perform a joining control for controlling the sheet conveyance unit, the discharge mechanism, and the nozzle moving unit such that an end portion of a sheet of the other original sheet roll is conveyed by the sheet conveyance unit and, thereafter, the nozzle part is moved to the first temporarily holding part or the second temporarily holding part for joining the end portion of the sheet of the other original sheet roll to a middle portion of the sheet of the one original sheet roll and, further, the adhesive agent is discharged to the end portion of the sheet of the other original sheet roll by the nozzle part.