A medium transport device includes a feeding unit that can be disposed at a contact position and a retracted position, a first restriction member that rotates between a restriction position and a release position, and a transport guide positioned on a side opposite to the feeding unit with a transport path interposed therebetween. When the first restriction member is positioned at the restriction position, the first restriction member maintains a state in which the feeding unit is positioned at the retracted position by the tip end contacting the feeding unit. When the first restriction member is positioned at the restriction position, the tip end thereof is positioned closer to the mounting portion side than the position of the rotation axis of the first restriction member in the transport direction.

A medium transport device includes a feeding unit that can be disposed at a contact position and a retracted position, a first restriction member that rotates between a restriction position and a release position, and a transport guide positioned on a side opposite to the feeding unit with a transport path interposed therebetween. When the first restriction member is positioned at the restriction position, the first restriction member maintains a state in which the feeding unit is positioned at the retracted position by the tip end contacting the feeding unit. When the first restriction member is positioned at the restriction position, the tip end thereof is positioned closer to the mounting portion side than the position of the rotation axis of the first restriction member in the transport direction.

A medium feeding device is provided with a feeding section for feeding a medium and sensors for detecting the medium. The feeding section includes a feed roller and a separation roller, the sensors form a sensor line in which the plurality of sensors is aligned in a feeding direction of the medium to be fed, the two sensor lines are arranged in such a manner that the sensors overlap with each other in a width direction of the medium to be fed, and the sensor lines are so configured as to extend, in the feeding direction, from an upstream region upstream of a nip point where the feed roller and the separation roller make contact with each other, a nip region including the nip point, and to a downstream region downstream of the nip point.

A feeding apparatus includes a knock-up plate to be rotatably installed on a main body of an image forming apparatus and install a paper, a knock-up spring to elastically apply pressure to the knock-up plate in a direction of a pickup roller, a cam to be fixed at one end of a knock-up shaft and downwardly apply pressure to the knock-up plate, and a driving force transfer member to transfer a rotating force of the knock-up shaft to the pickup roller.

A feeding apparatus includes a knock-up plate to be rotatably installed on a main body of an image forming apparatus and install a paper, a knock-up spring to elastically apply pressure to the knock-up plate in a direction of a pickup roller, a cam to be fixed at one end of a knock-up shaft and downwardly apply pressure to the knock-up plate, and a driving force transfer member to transfer a rotating force of the knock-up shaft to the pickup roller.

A medium feeding apparatus includes a feed roller that feeds media. A separation roller nips the media together with the feed roller to separate it and is rotated in a first direction to feed the media. A motor applies driving torque to the separation roller in a second direction opposite to the first direction. A torque limiter, when rotation torque applied to the separation roller in the first direction exceeds a preset upper torque limit, causes the separation roller to rotate at idle in the first direction independently of the driving torque. During feeding operations, including feeding of first and second media, a controller that controls the motor provides a break period in which the motor is not driven. The break period contains the timing when a rear edge of the first medium leaves a nip position between the feeding and separation rollers.

A paper feeding device 100 includes a support hook 5 that supports a lower edge of a front side of a bundle of stacked paper sheets X, and a paper trailing edge storing part 32 provided between a lower end of the abutting surface 31 and the paper feeding table 11, and the paper feeding device retracts the lowermost layer paper sheet of the loaded paper sheets so as to store its trailing edge in the paper trailing edge storing part 32 and then advance it.

A paper feeding device 100 includes a support hook 5 that supports a lower edge of a front side of a bundle of stacked paper sheets X, and a paper trailing edge storing part 32 provided between a lower end of the abutting surface 31 and the paper feeding table 11, and the paper feeding device retracts the lowermost layer paper sheet of the loaded paper sheets so as to store its trailing edge in the paper trailing edge storing part 32 and then advance it.

A medium feeder includes a feed roller that feeds a medium loaded on a medium loading section; a transport roller disposed downstream relative to the feed roller; a first driving source that drives at least the feed roller; a second driving source that drives at least the transport roller; and a housing that houses the feed roller, the transport roller, the first driving source, and the second driving source, wherein the housing includes a lower unit that constitutes a lower part of the housing, and an upper unit openable relative to the lower unit, and the first driving source and the second driving source are disposed on both sides relative to a center part of the lower unit in a width direction perpendicular to a medium transportation direction.

A medium feeding apparatus includes: a feed tray on which media M are placed; a draw-out unit that draws out an uppermost medium among the media placed on the feed tray; a hanging member that hangs the feed tray; and a load member that applies, when an amount of the media placed on the feed tray is equal to or smaller than a predetermined amount, a downward load to a portion of the feed tray located on an upstream side in a draw-out direction of the media.