Medium conveying apparatus in which separation force of separation roller by gear with respect to pressing force of separation roller by torque limiter is set appropriately

A medium conveying apparatus comprising:

• a feed roller to feed a medium;
• a separation roller located to face the feed roller to separate the medium;
• a torque limiter provided on a rotation axis of the separation roller;
• a motor to generate a driving force for rotating the separation roller in a direction opposite to a medium feeding direction;
• a unit including a first gear to rotate according to a driving force generated by the motor, a second gear provided on the rotation axis of the separation roller, and a third gear provided between the first gear and the second gear, wherein the unit is supported swingably with an axis of the first gear as a rotation axis, wherein
• the separation roller is pressed toward the feed roller side by a force generated by the torque limiter limiting a torque with which the separation roller attempts to rotate in a direction opposite to a rotation direction of the feed roller, wherein
• the first gear rotates in a direction for generating a force for separating the separation roller from the feed roller by rotation of the motor, wherein
• the third gear is a two-stage gear, and wherein
• the number of teeth of a gear on the second gear side of the third gear is more than the number of teeth of a gear on the first gear side of the third gear.