| 摘要 |
PROBLEM TO BE SOLVED: To feed a sheet correctly.SOLUTION: An image forming apparatus 100 includes a sheet feed device 500 that has a sheet stack board 51 for stacking sheets P, a lifting drive part for lifting the sheet stack board so that a top-most sheet reaches an upper stop position m, and a pair of side-end regulation members 52, 53 for regulating position of both end portions of the sheets in a width direction h, and feeds out the top-most sheet in a feed direction a with the sheet floated by a blown air, further includes: first auxiliary side-end regulation members 61, 62 that are disposed at a front end portion of the respective side-end regulation members and are enabled to change between a regulating position for regulating positions of the sheet in the width direction by protruding inward than the internal surfaces of the pair of the side-end regulation members, and a retracted position in front of the side-end regulation members; and a second auxiliary side-end regulation members 63 that are attachably-detachably disposed rearward than the first auxiliary side-end regulation members on the respective side-end regulation members, and regulate end positions of the sheet in the width direction, the sheet floated by the blown air, where lower end portions of the second auxiliary side-end regulation members are at positions higher than the upper stop position of the top-most sheet. |
