Sheet conveying device and image forming apparatus

A sheet conveying device comprising:

• a main tray capable of being exposed from and stored in an image forming apparatus main body by being pivotably supported by the image forming apparatus main body, wherein when the main tray is exposed from the image forming apparatus main body, a sheet can be placed on the main tray and the sheet can be supplied from the main tray into the image forming apparatus main body;
• and
• an auxiliary tray capable of being stored in and pulled out from the main tray in a direction opposite to a conveying direction of the sheet, wherein
• the main tray includes:
• a sheet placing portion;
• and
• a frame portion extending in the conveying direction,
• the auxiliary tray includes:
• a width alignment cursor configured to align a width of the sheet;
• and
• a pinion gear fitted into the frame portion,
• the width alignment cursor includes:
• a first width alignment cursor formed to extend along the conveying direction and configured to regulate a width direction of the sheet;
• a second width alignment cursor facing the first width alignment cursor in the width direction, formed to extend along the conveying direction, and configured to regulate the width direction;
• a first shaft including first continuous teeth, with one end connected to the first width alignment cursor and another end formed to extend toward the second width alignment cursor;
• and
• a second shaft including second continuous teeth, with one end connected to the second width alignment cursor and another end formed to extend toward the first width alignment cursor,
• the pinion gear includes third continuous teeth configured to mesh with the first continuous teeth and the second continuous teeth,
• fourth continuous teeth configured to mesh with the third continuous teeth of the pinion gear are formed on the frame portion,
• when the auxiliary tray is stored in the main tray,
• the pinion gear rotates to move along the frame portion, and the first width alignment cursor and the second width alignment cursor move toward each other in conjunction with the rotation of the pinion gear, and
• when the auxiliary tray is pulled out from the main tray,
• the pinion gear rotates to move along the frame portion, and the first width alignment cursor and the second width alignment cursor move away from each other in conjunction with the rotation of the pinion gear.