Image forming apparatus

An image forming apparatus comprising:

• a drive portion that has at least one drive source;
• an image forming portion that forms an image on a sheet;
• a first conveying path that guides the sheet so that the sheet passes through the image forming portion;
• a sheet conveyance portion that conveys the sheet on the first conveying path;
• a second conveying path that again guides the sheet on which the image is formed by the image forming portion to the first conveying path;
• a document feeding portion that feeds a document to the second conveying path;
• an image reading portion that reads the image of the document fed by the document feeding portion;
• a conveyance portion that conveys the document and the sheet on the second conveying path;
• a document discharge portion that discharges the document from which the image is read by the image reading portion;
• a first drive transmission portion that is capable of transmitting drive of the drive portion to the image forming portion and the sheet conveyance portion;
• and
• a second drive transmission portion that is capable of transmitting the drive of the drive portion to the document feeding portion, the conveyance portion and the document discharge portion when the drive is not transmitted to the image forming portion and the sheet conveyance portion by the first drive transmission portion.

An image forming apparatus comprising:

• a first drive system having a sheet feeding portion that feeds a sheet, an image forming portion that forms an image on the sheet fed from the sheet feeding portion, a sheet discharge portion that discharges the sheet on which the image is formed by the image forming portion, and a first drive transmission portion that transmits the drive to the sheet feeding portion, the image forming portion and the sheet discharge portion;
• a first conveying path which forms a conveyance route of the sheet from the sheet feeding portion to the sheet discharge portion and in which the image forming portion is disposed on the route thereof;
• a second conveying path that connects an upstream portion and a downstream portion of the image forming portion in a conveyance direction of the sheet on the first conveying path, and has a common conveying path through which the sheet on a first surface of which the image is formed by the image forming portion and the document pass;
• an image reading portion that is disposed to be capable of reading the image of the document conveyed on the common conveying path;
• and
• a second drive system which has a document feeding portion that feeds the document, a conveyance portion that conveys the document or the sheet on the common conveying path, a document discharge portion that discharges the document conveyed through the common conveying path and a second drive transmission portion that transmits the drive to the document feeding portion, the conveyance portion and document discharge portion, and in which the document feeding portion, the conveyance portion and the document discharge portion are capable of independently transmitting the drive with the first drive system.