Patent ID: 7515867

Claim:
An image formation apparatus, comprising: an apparatus body having a shaft and an image forming unit; and a sheet conveyance apparatus including: a paper feed cassette which is detachably attached to the apparatus body; a conveyance unit, including a motor, which separates and conveys a sheet from the paper feed cassette to the image forming unit; 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 the swing position of the swing member based on a detection by a sensor unit and whether the motor is being driven.