Medium feeding device and medium processing apparatus including the same

A medium feeding device comprising:

• a storage unit that stores media in a form of a sheet;
• a delivery unit that is disposed downstream in a medium delivery direction relative to the media stored in the storage unit and that delivers the media individually;
• a transfer unit that is disposed above the storage unit and that sticks by suction to each of the media stored in the storage unit and transfers the media to the delivery unit individually;
• a fluffing unit that is disposed beside the media stored in the storage unit in a direction intersecting the medium delivery direction, the fluffing unit fluffing an upper-side region of the media in a state of being separated by blowing air toward a side of the media;
• and
• a plurality of position detection units that are arranged in a region that is on a delivery unit side relative to a position of a downstream end portion, in the medium delivery direction, of each of the media stored in the storage unit and that does not reach a contact portion where the delivery unit comes into contact with the media, the position detection units being arranged at an interval in a width direction of the media intersecting the medium delivery direction, the position detection units detecting a position of the downstream end portion, in the medium delivery direction, of each of the media;
• and
• a control unit that determines whether a state of a downstream end portion, in the medium delivery direction, of a medium is within a predetermined permissible range, based on information detected by the position detection units, and that stops a feeding operation of the medium when the state of the downstream end portion of the medium in the medium delivery direction is in an abnormal range that is out of the permissible range.

A medium feeding device comprising:

• a storage unit that stores media in a form of a sheet;
• a delivery unit that is disposed downstream in a medium delivery direction relative to the media stored in the storage unit and that delivers the media individually;
• a transfer unit that is disposed above the storage unit and that sticks by suction to each of the media stored in the storage unit and transfers the media to the delivery unit individually;
• a fluffing unit that is disposed beside the media stored in the storage unit in a direction intersecting the medium delivery direction, the fluffing unit fluffing an upper-side region of the media in a state of being separated by blowing air toward a side of the media;
• and
• a plurality of position detection units that are in a region that is on a delivery unit side relative to a position of a downstream end portion, in the medium delivery direction, of each of the media stored in the storage unit and that does not reach a contact portion where the delivery unit comes into contact with the media, the position detection units being arranged at an interval in a width direction of the media intersecting the medium delivery direction, the position detection units detecting a position of the downstream end portion, in the medium delivery direction, of each of the media, wherein
• the position detection units are closer, in the medium delivery direction, to the downstream end portion of the media stored in the storage unit than to the contact portion of the delivery unit with the media,
• the delivery unit is held by a holding frame having attachment portions, and
• the position detection units are attached to the respective attachment portions.