Paper feed device and image forming apparatus

A paper feed device including a device body and a paper feed cassette inserted into the device body along an insertion direction, the paper feed device comprising:

• a lock lever mounted to the paper feed cassette via a lever shaft;
• a spring that applies a rotational force which rotates the lock lever in an engagement direction;
• and
• a lock member provided at the device body,
• wherein
• the lock lever has a lever claw provided at a tip end extending from the lever shaft toward a downstream side in the insertion direction,
• the lock member has an engagement area with which the lever claw is engaged, a pull-in area provided at an upstream side of the engagement area in the insertion direction, and a push-up area provided at an upstream side of the pull-in area in the insertion direction,
• the pull-in area, toward the engagement area, is inclined so as to descend downstream in the insertion direction,
• when the paper feed cassette is to be inserted into the device body, the lever claw presses the pull-in area, and
• the push-up area, toward the pull-in area, is inclined so as to rise.