Patent ID: 8267394

Claim:
A sheet feeding device, comprising: a sheet feeder 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 disposed facing a sheet stack accommodated in the sheet container, a first tension roller to keep the attraction belt taut, and a second tension roller disposed upstream from the first tension roller in a sheet conveyance direction to keep the attraction belt taut together with the first tension roller; and a side holder to rotatably support the belt unit that pivots about the first tension roller, the side holder pivotably mounted on a rotary shaft disposed upstream from the second tension roller of the belt unit in the sheet conveyance direction; a contact and separation drive unit 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, a drive gear to transmit a drive force from the drive unit, and a rack mounted on a shaft of the second tension roller for meshing with the drive gear, the swing range adjuster adjusting 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 attracted thereto to separate from the sheet stack.