Sheet feeding device and image forming apparatus incorporating the sheet feeding device

A sheet feeding device comprising:

• a sheet loader on which a sheet is loaded;
• a roller detachably attached to an apparatus body of an image forming apparatus and having a first engaging portion and a second engaging portion opposite to the first engaging portion, the roller configured to feed the sheet loaded on the sheet loader in a sheet conveying direction;
• a drive device configured to rotate the roller;
• a shaft rotated by the drive device, the shaft configured to engage with the first engaging portion of the roller and transmit a driving force to the roller;
• a movable body configured to move in a direction parallel to a rotational axis of the shaft, the movable body including:
• a holding portion configured to engage with the second engaging portion of the roller and rotatably hold the roller,
• a guide configured to guide attachment of the second engaging portion of the roller to the holding portion;
• and
• a biasing body configured to apply a biasing force and bias the movable body from a drive receiving side to a drive transmitting side, wherein
• the roller includes a tapered portion having a conical frustum shape on the drive transmitting side, and
• the movable body includes a regulator configured to contact the tapered portion of the roller and avoid attachment of the roller when the roller is being attached in an incorrect orientation while the movable body is moved in the direction parallel to the rotational axis of the shaft against the biasing force applied by the biasing body.