Sheet feed device

A sheet feed device comprising:

• a removal sheet feed tray that is installed in the sheet feed device;
• a bottom plate that is provided in the sheet feed tray, and is capable of being lifted up together with one or more papers stacked thereon so as to make a leading portion of an uppermost paper positioned at an upper limit position when the sheet feed tray is installed in the sheet feed device;
• a base that is provided within the sheet feed device, and to which a sheet feeder, a sheet detection member and an upper limit detection member are attached;
• the sheet feeder that feeds out the papers stacked on the bottom plate sequentially from the sheet feed tray;
• the sheet detection member that detects whether or not at least one paper is stacked on the sheet feed tray by a contact detection with the paper or the bottom plate;
• the upper limit detection member that detects whether or not the leading portion of the uppermost paper is positioned at the upper limit position by a contact detection with the uppermost paper;
• and
• an evacuator that evacuates the sheet detection member and the upper limit detection member to an evacuation position where the sheet detection member and the upper limit detection member never interfere a removal of the sheet feed tray from the sheet feed device and an installation of the sheet feed tray in the sheet feed device.