Patent ID: 8628074

Claim:
A sheet feeding device, comprising: a sheet feeder configured to feed and convey a sheet from a sheet container toward an image forming device, the sheet feeder including, a belt unit including an attraction belt facing a sheet stack accommodated in the sheet container, a first tension roller configured to keep the attraction belt taut, and a second tension roller upstream from the first tension roller in a sheet conveyance direction and configured to keep the attraction belt taut together with the first tension roller, and a side holder configured to rotatably support the belt unit that pivots about the first tension roller, the side holder pivotably mounted on a rotary shaft upstream from the second tension roller of the belt unit in the sheet conveyance direction; a contact and separation drive unit configured to swing the sheet feeder to make the attraction belt of the belt unit contact with and separate from the sheet stack; and a swing range adjuster including an adjuster drive unit and configured to adjust a range of swing of the belt unit with respect to the side holder between a sheet contact position at which the attraction belt contacts an uppermost sheet of the sheet stack and a sheet separation position at which the contact and separation drive unit causes the attraction belt with the uppermost sheet attached thereto to separate from the sheet stack, according to a predetermined condition.