| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sheet feeder and an image forming apparatus can prevent the overloading of sheets without complicating replacement of a sheet feed roller. Ž<P>SOLUTION: The sheet feed roller 11 to feed sheets loaded in a sheet feed cassette 6 is movably held by an axial sliding operation. A height restricting member 12 having a plurality of abutment portions 23, in the width direction perpendicular to the sheet feed direction, abutting on the sheets overloaded in the sheet feed cassette 6 when the sheet feed cassette 6 is attached to restrict the sheet feed roller 11 not to move overloaded excess sheets to a feedable position is made movable to a restricting position where the abutment portions 23 are positioned on both sides of the sheet feed roller 11 to restrict the axial sliding operation of the sheet feed roller 11 and to a retreat position where the axial sliding operation of the sheet feed roller 11 is enabled. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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