| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a sheet feeder which can reduce an impact noise during feeding of a sheet while keeping a sheet feed stability, and an image formation device.SOLUTION: A sheet feed part is equipped with a first feed cam 22 which rotates integrally with a feed shaft 21, and a second feed cam 23 which can rotate in the same direction as a rotation direction of the feed shaft 21 from an initial position and against a biasing force of a torsion spring 24 onto the feed shaft 21. A biasing force of a spring 3 and the biasing force of the torsion spring 24 are so set that the second feed cam 23 is held at an initial position when a seat S is under a full load condition, and the second feed cam 23 is rotated in the same direction as the rotation direction of the feed shaft 21 and an outer peripheral surface thereof is retracted with respect to the first feed cam 22 when the seat S is under a less load condition, thereby the cams are changed over according to load conditions of the seat S.</p> |
