Sheet supply apparatus, image reading apparatus, and recording apparatus

An image reading apparatus comprising:

• a tray on which a sheet is to be placed;
• a regulation guide disposed to the tray and configured to regulate a side end of the sheet in a width direction when the sheet is conveyed in a conveyance direction;
• a supporting body including a first teeth part and configured to move in the width direction together with the regulation guide;
• a rotating body including a second teeth part engaging with the first teeth part of the supporting body and configured to rotate with movement of the supporting body;
• and
• a reading unit configured to read an image of the sheet supplied from the tray,
• wherein displacement of the second teeth part to the rotating body varies based on a position of the regulation guide.

A recording apparatus comprising:

• a tray on which a sheet is to be placed;
• a regulation guide disposed to the tray and configured to regulate a side end of the sheet in a width direction when the sheet is conveyed in a conveyance direction;
• a supporting body including a first teeth part and configured to move in the width direction together with the regulation guide;
• a rotating body including a second teeth part engaging with the first teeth part of the supporting body and configured to rotate with movement of the supporting body;
• and
• a recording unit configured to record an image on the sheet supplied from the tray,
• wherein displacement of the second teeth part to the rotating body varies based on a position of the regulation guide.