Image formation apparatus and sheet conveyance apparatus

An image formation apparatus, comprising:

• an apparatus body having a shaft;
• and
• a sheet conveyance apparatus;
• wherein the sheet conveyance apparatus includes:
• a paper feed cassette which is detachably attached to the apparatus body;
• a conveyance unit which separates and conveys a sheet from the paper feed cassette;
• a swing member which is swingably supported about the shaft relative to the apparatus body, and whose swing positions are respectively changed in a state where the paper feed cassette is detached from the apparatus body, a state where the paper feed cassette is attached to the apparatus body and where the sheet is not being conveyed, and a state where the paper feed cassette is attached to the apparatus body and where the sheet is being conveyed;
• and
• a detection unit which detects a change of the swing positions.

An image formation apparatus, comprising:

• a cassette in which a recording medium is received;
• and
• an apparatus body including an opening that is open to an exterior thereof, and a cassette accommodation portion that accommodates the cassette detachably through the opening;
• wherein the apparatus body has a first surface having an angle relative to a pulling-out direction of the cassette, at a peripheral edge part of the opening;
• the cassette includes a cover wall having a second surface to oppose to the first surface, wherein the second surface overlaps at least the first surface of the peripheral edge part of the opening in a state when the cassette is accommodated in the cassette accommodation portion;
• and
• at least one of the first surface and the second surface is provided with an elastic member which is held between the first surface and the second surface when the cassette is accommodated in the cassette accommodation portion.