Sheet feeding device and image forming apparatus

A sheet feeding device which feeds a sheet from a sheet bundle set on a sheet feeding cassette, the sheet feeding device comprising:

• a sheet feeding roller conveying the sheet along a conveyance path;
• a following roller coming into pressure contact with the sheet feeding roller and following the sheet feeding roller;
• a rotational speed detection part configured to detect a rotational speed of the following roller;
• and
• a control part configured to accelerate a rotation of the sheet feeding roller and to adjust a sheet interval, wherein
• the control part obtains a rotational rate of the following roller to the sheet feeding roller based on the rotational speed of the following roller, obtains an actual linear velocity of the sheet based on the rotational rate of the following roller and a theoretical linear velocity of the sheet after accelerating the rotation of the sheet feeding roller, and then adjusts the sheet interval based on the actual linear velocity of the sheet.