Image reading apparatus and image forming apparatus

An image reading apparatus comprising:

• a main body unit;
• a sheet conveyance unit supported in an openable/closable manner on the main body unit and configured to convey a sheet;
• a conveyance path comprising a first transparent member provided on an upper surface of the main body unit, and a second transparent member provided on a lower surface of the sheet conveyance unit, through which the sheet conveyed by the sheet conveyance unit passes;
• a first image reading portion provided on the main body unit, and configured to read an image on a first surface of the sheet conveyed on the conveyance path via the first transparent member at a first reading position;
• a second image reading portion provided on the sheet conveyance unit downstream of the first image reading portion in a sheet conveyance direction, and configured to read an image on a second surface opposite from the first surface of the sheet conveyed on the conveyance path via the second transparent member at a second reading position;
• a third conveyance path securing portion arranged downstream of the second reading position of the second image reading portion in the sheet conveyance direction and configured to secure the conveyance path between the upper surface of the main body unit and the lower surface of the sheet conveyance unit;
• and
• a fourth conveyance path securing portion arranged upstream of the first reading position of the first image reading portion in the sheet conveyance direction and configured to secure the conveyance path together with the third conveyance path securing portion.

An image reading apparatus comprising:

• a main body unit;
• a sheet conveyance unit supported in an openable/closable manner on the main body unit and configured to convey a sheet;
• a conveyance path comprising a first transparent member provided on an upper surface of the main body unit, and a second transparent member provided on a lower surface of the sheet conveyance unit, through which the sheet conveyed by the sheet conveyance unit passes;
• a first image reading portion provided on the main body unit, and configured to read an image on a first surface of the sheet conveyed on the conveyance path via the first transparent member at a first reading position;
• a second image reading portion provided on the sheet conveyance unit downstream of the first image reading portion in a sheet conveyance direction, and configured to read an image on a second surface opposite from the first surface of the sheet conveyed on the conveyance path via the second transparent member at a second reading position;
• and
• a projection arranged between the first reading position of the first image reading portion and the second reading position of the second image reading portion in the sheet conveyance direction, and projected from one of the upper surface of the main body unit and the lower surface of the sheet conveyance unit,
• wherein the conveyance path is secured between the upper surface and the lower surface by the projection abutting against the other of the upper surface and the lower surface.