Sheet conveyor and image forming apparatus

An image forming apparatus comprising:

• an apparatus main body;
• a sheet conveyor configured to convey a sheet;
• a print engine configured to form an image on the sheet;
• and
• a drawer movable between a mounted position at which the drawer is mounted on the apparatus main body and a pulled-out position at which the drawer is pulled out from the mounted position, the drawer supporting the print engine,
• the sheet conveyor comprising:
• a first roller including a rotation shaft extending in a first direction;
• a second roller facing the first roller in a second direction perpendicular to the first direction, the first roller and the second roller being configured to convey the sheet in cooperation with each other;
• a first bearing configured to support a first end portion of the rotation shaft on one side in the first direction, the first bearing being formed of a conductive resin;
• a second bearing configured to support the first end portion, the second bearing being formed of a material having higher toughness than the first bearing;
• a spring configured to urge the first bearing in a direction in which the first roller presses the second roller, the spring being formed of a conductive material;
• and
• a frame configured to support the second bearing to be movable in the second direction,
• the second bearing being configured to receive a force of the rotation shaft that moves in the first direction,
• the frame being configured to restrict movement in the first direction of the second bearing that receives the force of the rotation shaft that moves in the first direction,
• the second roller being rotatably supported by the drawer, the second roller being configured to be separated from the first roller due to movement of the drawer toward the pulled-out position,
• the drawer including:
• a holding surface configured to hold the second bearing to be movable in the second direction in a state where the drawer is at the mounted position;
• and
• a releasing surface configured to, when the drawer starts moving from the mounted position toward the pulled-out position, push the second bearing and release pressing of the first roller against the second roller.