Conveying apparatus and tray unit

A tray unit used for a conveying apparatus, the conveying apparatus comprising (a) a plurality of receiving trays each having a receiving surface that receives a medium, the plurality of receiving trays being arranged in a vertical direction, (b) a conveying mechanism configured to convey the medium to the receiving surface of one of the plurality of receiving trays, selectively, (c) a supporter supporting the plurality of receiving trays, and (d) a recorder configured to perform recording on the medium conveyed by the conveying mechanism,

• the tray unit comprising:
• the plurality of receiving trays comprising (i) a lowest tray located at a lowest position among the plurality of receiving trays and (ii) a first receiving tray that is each of at least one of the plurality of receiving trays and the at least one of the plurality of receiving trays does not include the lowest tray;
• a swing mechanism configured to swing the first receiving tray with respect to the supporter so as to move the first receiving tray selectively to one of a receiving position at which the first receiving tray receives the medium conveyed by the conveying mechanism and an upper position at which a position of a downstream end of the first receiving tray in a conveying direction in which the medium is conveyed by the conveying mechanism is higher than a position of the downstream end of the first receiving tray located at the receiving position;
• a position-keeper configured to keep the first receiving tray at the upper position when a first external force that is an external force directed in a direction in which the first receiving tray is moved from the upper position toward the receiving position is not applied to the first receiving tray located at the upper position;
• and
• wherein the swing mechanism is configured to swing the first receiving tray with respect to the supporter toward the receiving position when the first external force is applied to the first receiving tray,
• wherein the tray unit further comprises a force-reducer configured to reduce a keeping force, of the position-keeper, so as to cease keeping the first receiving tray at the upper position, and
• wherein, when a recording command for instructing the recorder to perform recording is received, the position-keeper moves a destination receiving tray of the plurality of receiving trays from the upper position to the receiving position, the destination receiving tray being located at the upper position and serving as a destination to which the medium is to be conveyed by the conveying mechanism.