Sheet feeding apparatus and image forming apparatus

A sheet feeding apparatus comprising:

• sheet storage means comprising a sheet support stand that can move up and down,
• drive means for driving the sheet support stand to move up and down,
• drive transmission means for transmitting a driving force from the drive means to the sheet storage means,
• support means for supporting the sheet storage means so that the sheet storage means can move in a moving path between a sheet replenishing position and a sheet feeding position,
• frame means for fastening the support means,
• sheet feeding means for separating the sheets in the sheet storage means into a single sheet and feeding the single sheet to the sheet feeding position, and
• sheet size detecting means for detecting a size of the sheets stored in the sheet storage means, said sheet size detecting means arranged in a position overlapping the drive transmission means in a sheet stacking direction when the sheet storage means is positioned at the sheet feeding position.

A sheet feeding apparatus comprising:

• sheet storage means for storing sheets,
• support means for supporting the sheet storage means so that the sheet storage means can move in a moving path between a sheet replenishing position and a sheet feeding position,
• frame means for fastening the support means,
• sheet feeding means for separating the sheets stored in the sheet storage means into a single sheet and feeding the single sheet to the sheet feeding position, and
• sheet size detecting means for detecting a size of the sheets stored in the sheet storage means, said sheet size detecting means established in a position overlapping the moving path in a sheet stacking direction.

An image forming apparatus comprising:

• a sheet storage means having a sheet support stand that can move up and down;
• drive means for driving the sheet support stand to move up and down;
• drive transmission means for transmitting a driving force from the drive means to the sheet storage means;
• support means for supporting the sheet storage means so that the sheet storage means can move in a moving path between a sheet replenishing position and a sheet feeding position;
• frame means for fastening the support means;
• sheet feeding means for separating sheets stored in the sheet storage into a single sheet and feeding the single sheet to the sheet feeding position;
• sheet size detecting means for detecting a size of the sheets stored in the sheet storage means, said sheet size detecting means arranged in a position overlapping the drive transmission means in a sheet stacking direction when the sheet storage means is positioned at the sheet feeding position.