| 主权项 |
1. A feed apparatus comprising:
a support unit configured to support a sheet; a feed roller configured to feed the sheet supported by the support unit in a feed direction; an arm configured to be swingable about a swing shaft and configured to rotatably support the feed roller about a shaft different from the swing shaft; a guide unit provided on a downstream side of the support unit in the feed direction, the guide unit having a sheet abutment surface configured to abut against the sheet fed in the feed direction to guide the sheet; a movable member provided for the guide unit and configured to be movable to a protruding position at which the movable member protrudes from the sheet abutment surface and the movable member is able to abut against the sheet supported by the support unit and a retracted position at which the movable member is retracted from the sheet abutment surface, the movable member having a restraining surface configured to abut against the sheet to restrain the sheet; a driving source configured to perform forward rotation and reverse rotation; a first driving transmission unit configured to transmit a rotary driving force from the driving source to an intermediate gear; a second driving transmission unit configured to transmit the rotary driving force from the intermediate gear to the feed roller; a third driving transmission unit configured to transmit the rotary driving force from the intermediate gear to the movable member; and a contact-separating mechanism coupled to the feed roller or the arm and configured to move the feed roller to an abutment position at which the feed roller abuts against the sheet supported by the support unit and a separated position further from the support unit than the abutment position by means of the rotary driving force applied from the second driving transmission unit, wherein: the feed roller is rotated in a direction to feed the sheet in the feed direction in a case that the rotary driving force of the forward rotation is applied from the driving source, and the feed roller is rotated in a direction opposite to the direction to feed the sheet in the feed direction in a case that the rotary driving force of the reverse rotation is applied from the driving source; the movable member is shifted from the protruding position to the retracted position in a case that the rotary driving force of the forward rotation is applied from the driving source, and the movable member is shifted from the retracted position to the protruding position in a case that the rotary driving force of the reverse rotation is applied from the driving source; the contact-separating mechanism moves the feed roller from the separated position to the abutment position in a case that the rotary driving force of the forward rotation is applied from the driving source, and the contact-separating mechanism moves the feed roller from the abutment position to the separated position in a case that the rotary driving force of the reverse rotation is applied from the driving source; and in a state in which the movable member is disposed at the protruding position and the feed roller is disposed at the separated position, a time required between start of the forward rotation of the driving source and start of feeding of the sheet by the feed roller moved from the separated position to the abutment position, the feed roller being moved by the contact-separating mechanism operated by the rotary driving force of the driving source transmitted to the contact-separating mechanism via the first driving transmission unit, the intermediate gear and the second driving transmission unit, is longer than a time required between the start of the forward rotation of the driving force and a shift of the movable member from the protruding position to the retracted position by the rotary driving force of the driving source transmitted to the movable member via the first driving transmission unit, the intermediate gear and the second driving transmission unit. |
