SHEET TRANSPORT MECHANISM AND IMAGE FORMING DEVICE PROVIDED WITH SAME

摘要

The sheet transport mechanism of the present disclosure is provided with drive roller, driven roller, and roller pressing mechanism. The roller pressing mechanism presses the driven roller into contact against the drive roller. The driven roller includes a central driven roller, a first rotating shaft for supporting the central driven roller, at least one pair of outside driven rollers, and second rotating shafts supporting the outside driven rollers. The roller pressing mechanism includes a central pressing mechanism, and an outside pressing mechanism. The central pressing mechanism presses the central driven roller against the drive roller. The outside pressing mechanism presses the outside driven rollers against the drive roller.

主权项

1. A sheet transport mechanism comprising:
transport roller pairs constituted by drive roller rotated by drive power from a drive source, and driven roller pressed into contact against the drive roller and passively driven thereby; and roller pressing mechanism for pressing the driven roller into contact against the drive roller; the sheet transport mechanism being adapted to transport a recording medium pinched in a nip section of the transport roller pairs, wherein the driven roller includes a central driven roller disposed to the center side in the axial direction, with a first rotating shaft for supporting the central driven roller, at least one pair of outside driven rollers arranged symmetrically on either side of the central driven roller in an axial direction, and with second rotating shafts for supporting the outside driven rollers; and the roller pressing mechanism includes a central pressing mechanism for pressing the central driven roller into contact against the drive roller, and an outside pressing mechanism for pressing the outside driven rollers into contact against the drive roller.