Medium transport device and image reading apparatus

A medium transport device that transports a medium along a transport path, comprising:

• a mounting portion that includes a mounting surface on which the medium is mounted;
• a feeding unit that includes a feeding roller feeding the medium mounted on the mounting surface to a downstream in a transport direction, wherein the feeding unit is configured to be disposed at (i) a contact position at which the feeding roller contacts the mounting surface and (ii) a retracted position at which the feeding roller is separated from the mounting surface and contact between the medium mounted on the mounting surface and the feeding roller is disabled;
• a restriction member that, when a width direction of the medium mounted on the mounting surface is a medium width direction, the width direction intersecting the transport direction, (i) rotates between a restriction position and a release position around a rotation axis that extends in the medium width direction and (ii) is disposed downstream of the mounting portion in the transport direction;
• and
• a transport guide positioned on a side opposite to the feeding unit with the transport path interposed therebetween, wherein
• the release position is a position where a tip end of the restriction member is disposed downstream in the transport direction, as compared with a case where the restriction member is positioned at the restriction position,
• when the restriction member is positioned at the restriction position, the restriction member
• maintains a state in which the feeding unit is positioned at the retracted position, and
• restricts a movement of the medium mounted on the mounting surface to the downstream in the transport direction,
• when the restriction member is positioned at the release position, the restriction member
• allows displacement of the feeding unit to the contact position, and
• allows the movement of the medium mounted on the mounting portion to the downstream in the transport direction,
• a contact target is provided with a restricting recess in which the tip end of the restriction member is accommodated when the restriction member is positioned at the restriction position, and
• in the transport direction, the restricting recess is between the mounting portion and a position of the rotation axis of the restriction member.

A medium transport device that transports a medium along a transport path, comprising:

• a mounting portion that includes a mounting surface on which the medium is mounted;
• a feeding unit that includes a feeding roller feeding the medium mounted on the mounting surface to a downstream in a transport direction, wherein the feeding unit is configured to be disposed at (i) a contact position at which the feeding roller contacts the mounting surface and (ii) a retracted position at which the feeding roller is separated from the mounting surface and contact between the medium mounted on the mounting surface and the feeding roller is disabled;
• a restriction member that, when a width direction of the medium mounted on the mounting surface is a medium width direction, the width direction intersecting the transport direction, (i) rotates between a restriction position and a release position around a rotation axis that extends in the medium width direction and (ii) is disposed downstream of the mounting portion in the transport direction;
• and
• a transport guide positioned on a side opposite to the feeding unit with the transport path interposed therebetween, wherein
• the release position is a position where a tip end of the restriction member is disposed downstream in the transport direction, as compared with a case where the restriction member is positioned at the restriction position,
• when the restriction member is positioned at the restriction position, the restriction member
• maintains a state in which the feeding unit is positioned at the retracted position, and
• restricts a movement of the medium mounted on the mounting surface to the downstream in the transport direction,
• when the restriction member is positioned at the release position, the restriction member
• allows displacement of the feeding unit to the contact position, and
• allows the movement of the medium mounted on the mounting portion to the downstream in the transport direction,
• a contact target is provided with a restricting protrusion with which the tip end of the restriction member comes into contact from an upstream in the transport direction when the restriction member is positioned at the restriction position, and
• in the transport direction, the restricting protrusion is between the mounting portion and a position of the rotation axis of the restriction member.