Paper feeder and image forming apparatus using the same

An image forming apparatus, comprising:

• a side door member configured to cover a side of a main body of the image forming apparatus, the side door member being openable and closable with respect to the main body;
• an image forming part provided in the main body and configured to form an image on paper;
• and
• a paper feeder integrated with the side door member, the paper feeder including
• a plurality of paper feed openings;
• and
• a plurality of paper feed parts provided in positions corresponding to the paper feed openings, the paper feed parts including a first paper feed part configured to receive a plurality of paper sheets and feed the paper sheets and a single sheet manual feed part configured to feed a single paper sheet and provided above the first paper feed part,
• wherein the single sheet manual feed part has a straight conveyance path conveying the paper sheet horizontally and straight without bending the paper sheet from the single sheet manual feed part up to the image forming part,
• the first paper feed part has a first door member having a tray for holding the paper sheets, the first door member being provided so as to be rotatable and to be openable and closable with respect to the main body of the image forming apparatus,
• the single sheet manual feed part has a second door member having a tray for holding the paper sheet, the second door member being provided inside the first door member so as to be rotatable and to be openable and closable with respect to the main body of the image forming apparatus so as to be covered by the first door member,
• a paper conveyance path from the first paper feed part to the image forming part conveys the paper sheets from the first paper feed part in an upward direction, and merges with the straight conveyance path of the single sheet manual feed part on an upstream side of the image forming part,
• the second door member of the single sheet manual feed part and the paper feed openings are configured to be hidden inside the first door member of the first paper feed part and externally invisible with the first door member and the second door member being closed,
• the side door member has a guide member provided on an internal side thereof, the guide member being configured to guide the paper sheets conveyed from the first paper feed part in the upward direction, and
• the side door member, the first door member, and the second door member form a triple door structure, the first door member configured to be opened with the side door member being closed.