A paper feeder, comprising:
- a housing;
- a driving unit;
- a sheet loading portion located in the housing, for loading sheets;
- a paper feeding unit supported by the housing and feeding the sheet to be loaded in the sheet loading portion in a predetermined conveyance direction;
- and
- a lock mechanism located in the housing;
- wherein
- the paper feeding unit includes
- a pickup roller including a first shaft portion, the pickup roller being configured to change positions between a paper feeding position and a non-paper feeding position, the paper feeding position being a position in which the pickup roller is in contact with the sheet to be loaded in the sheet loading portion, the non-paper feeding position being a position in which the pickup roller is separated from the sheet, the pickup roller being rotatably driven around the first shaft portion, and sending out the sheet in the conveyance direction,
- a second shaft portion connected to the driving unit and rotatably driven forward and reversely,
- a feed roller that is located in a downstream side in the conveyance direction with respect to the pickup roller, and is rotatably driven forward around the second shaft portion, and conveys the sheet sent out from the pickup roller to the downstream side of the conveyance direction,
- a holder that rotatably supports the pickup roller through the first shaft portion, and is configured to change positions between a first position and a second position, the holder rotatably driven forward around the second shaft portion changing the position to the first position, the first position causing the pickup roller to be located in the paper feeding position, the holder rotatably driven reversely around the second shaft portion changing the position to the second position, the second position being a position that causes the pickup roller to be located in the non-paper feeding position, and
- a stopper that is swingably supported in the holder and configured to change states between a regulation state and a permission state, the regulation state being a state that regulates entrance of the sheet to be loaded in the sheet loading portion into a side of the feed roller side corresponding to the second position of the holder, the permission state being a state that permits entrance of the sheet into the feed roller side corresponding to the first position of the holder;
- and
- the lock mechanism locks the holder in the second position at a time of non-paper feeding.