Abstract: A sheet feeding device includes a sheet feeding cassette, which is detachable with respect to a sheet feeding cassette mounting portion provided on an image forming device body. The sheet feeding cassette includes a storage portion that stores a paper sheet, a first regulator provided on a bottom portion of the storage portion that regulates the position of a paper sheet, and a movable placement plate that upwardly pushes a paper sheet stored in the storage portion. The movable placement plate includes a second regulator that regulates the position of a paper sheet having a different size to the size of a paper sheet that can be regulated by the first regulator.

Abstract: A sheet accommodating device includes a first plate member on which sheets are mounted, a first biasing member, a second plate member; and a second biasing member, and has a configuration in which, according to a size of the sheets, the first biasing member presses up the first plate member or both the first and second biasing members press up both the first and second plate members. The first plate member is provided so as to be turnable with respect to the second plate member around a first fulcrum axis line extending along a width direction orthogonal to a sheet feed direction in which the sheets are fed. The second plate member is provided so as to be turnable with respect to a body of the sheet accommodating device around a second fulcrum axis line extending along the width direction.

Abstract: A sheet accommodating device includes a regulating member that regulates end portions of sheets and a moving member movably provided in a body of the sheet accommodating device. The regulating member is detachably provided on the moving member. A moving region of the moving member includes a size regulation region where the end portions of the sheets are regulated and a predetermined non-size regulation region excluding the size regulation region. The sheet accommodating device is configured to permit the regulating member to be attached to and detached from the moving member in a predetermined attaching and detaching position of the non-size regulation region and prohibit the regulating member from being detached from the moving member in a detachment prohibition region of the moving region excluding the attaching and detaching position.

Abstract: A sheet feeding device includes a sheet feeding cassette, which is detachable with respect to a sheet feeding cassette mounting portion provided on an image forming device body. The sheet feeding cassette includes a storage portion that stores a paper sheet, a first regulator provided on a bottom portion of the storage portion that regulates the position of a paper sheet, and a movable placement plate that upwardly pushes a paper sheet stored in the storage portion. The movable placement plate includes a second regulator that regulates the position of a paper sheet having a different size to the size of a paper sheet that can be regulated by the first regulator.

Abstract: A sheet accommodating device includes a first plate member on which sheets are mounted, a first biasing member that presses up the first plate member, a second plate member disposed on a side of the first plate member opposite to a side of the first plate member on which the sheets are mounted; and a second biasing member that presses up the second plate member, and has a configuration in which, according to a size of the sheets, the first biasing member presses up the first plate member or both the first and second biasing members press up both the first and second plate members. An area of the first plate member is smaller than an area of the second plate member.

Abstract: A sheet accommodating device includes a regulating member that regulates end portions of sheets and a moving member movably provided in a body of the sheet accommodating device. The regulating member is detachably provided on the moving member. A moving region of the moving member includes a size regulation region where the end portions of the sheets are regulated and a predetermined non-size regulation region excluding the size regulation region. The sheet accommodating device is configured to permit the regulating member to be attached to and detached from the moving member in a predetermined attaching and detaching position of the non-size regulation region and prohibit the regulating member from being detached from the moving member in a detachment prohibition region of the moving region excluding the attaching and detaching position.

Abstract: A sheet accommodating device includes a first plate member on which sheets are mounted, a first biasing member that presses up the first plate member, a second plate member disposed on a side of the first plate member opposite to a side of the first plate member on which the sheets are mounted; and a second biasing member that presses up the second plate member, and has a configuration in which, according to a size of the sheets, the first biasing member presses up the first plate member or both the first and second biasing members press up both the first and second plate members. An area of the first plate member is smaller than an area of the second plate member.

Abstract: A sheet accommodating device includes a first plate member on which sheets are mounted, a first biasing member, a second plate member; and a second biasing member, and has a configuration in which, according to a size of the sheets, the first biasing member presses up the first plate member or both the first and second biasing members press up both the first and second plate members. The first plate member is provided so as to be turnable with respect to the second plate member around a first fulcrum axis line extending along a width direction orthogonal to a sheet feed direction in which the sheets are fed. The second plate member is provided so as to be turnable with respect to a body of the sheet accommodating device around a second fulcrum axis line extending along the width direction.

Abstract: An image forming apparatus (100) includes a discharge section (210), a paper receiving tray (93), a first detecting section (211), a lever (220), a second detecting section (230) and a decision section (240). The first detecting section (211) is disposed in the discharge section (210), and detects a paper jam. The second detecting section (230) detects a swinging state of the lever (220) from a first position at which the lever (220) is not in the process of receiving an action of the paper sheet to a second position. The decision section (240) judges an occurrence factor in a paper jam to be a user-induced factor when the second detecting section (230) detects a state in which the lever is at the first position in a state where the first detecting section (211) detects the paper jam.

Abstract: A paper conveying device includes: a registration roller pair provided along a paper conveying path; a pick-up roller, a paper feed roller and a separation roller for feeding sheets of paper to the paper conveying path; and a controller controlling conveyance of sheets of paper such that when a preceding sheet is stopped at the registration roller pair, a following, succeeding sheet is temporarily stopped at a prescribed position G downstream of a conveying roller in the paper conveying direction, and the succeeding sheet is re-conveyed toward the registration roller pair at a prescribed timing. The controller changes the timing to start re-conveyance of the succeeding sheet in accordance with paper length of the conveyed sheet of paper.

Abstract: A sheet conveying device (30) includes a plurality of first conveyance rollers (31) and a plurality of second conveyance rollers (32). The sheet conveying device (30) includes stiffening rollers (34). The stiffening rollers (34) are disposed coaxially with at least one conveyance rollers (32) among the first and second conveyance rollers (31) and (32), and have diameters larger than diameters of the conveyance rollers (32). The stiffening rollers (34) includes first stiffening rollers (34a), which apply conveying forces to a sheet (P), and second stiffening rollers (34b), which apply smaller conveying forces to the sheet (P) than the conveying forces to the sheet (P) in the first stiffening rollers (34a).

Abstract: A paper feeding device includes a pressing member, a restricting mechanism, and an interlocking mechanism. The pressing member is movable up and down between a pressing position and a release position. The pressing position causes a pressure to a paper sheet against the feed roller. The release position causes a release of the pressure. The restricting mechanism is movable between a restricting position and a removal position. The restricting position causes a restriction on moving up of the pressing member to the pressing position. The removal position causes a removal of the restriction. The interlocking mechanism is configured to move the restricting mechanism to the removal position in interlock with rotation of the feed roller.

Abstract: A sheet conveying device (30) includes a plurality of first conveyance rollers (31) and a plurality of second conveyance rollers (32). The sheet conveying device (30) includes stiffening rollers (34). The stiffening rollers (34) are disposed coaxially with at least one conveyance rollers (32) among the first and second conveyance rollers (31) and (32), and have diameters larger than diameters of the conveyance rollers (32). The stiffening rollers (34) includes first stiffening rollers (34a), which apply conveying forces to a sheet (P), and second stiffening rollers (34b), which apply smaller conveying forces to the sheet (P) than the conveying forces to the sheet (P) in the first stiffening rollers (34a).

Abstract: A paper conveying device includes: a registration roller pair provided along a paper conveying path; a pick-up roller, a paper feed roller and a separation roller for feeding sheets of paper to the paper conveying path; and a controller controlling conveyance of sheets of paper such that when a preceding sheet is stopped at the registration roller pair, a following, succeeding sheet is temporarily stopped at a prescribed position G downstream of a conveying roller in the paper conveying direction, and the succeeding sheet is re-conveyed toward the registration roller pair at a prescribed timing. The controller changes the timing to start re-conveyance of the succeeding sheet in accordance with paper length of the conveyed sheet of paper.

Abstract: A recording paper conveying device includes a registration roller pair and a conveyor roller pair adjacent to the registration roller pair. By rotating the conveyor roller pair, a sheet of recording paper is fed until leading edge of the sheet abuts the registration roller pair in stationary state so that the sheet is deflected by a prescribed amount. Then, conveyor roller pair is rotated at the constant velocity, and while the sheet is kept deflected, rotation of the registration roller pair is started, to start feeding of the sheet by the registration roller pair. While the registration roller pair is kept rotating, rotation of the conveyor roller pair is suspended, and then, the conveyor roller pair is returned to the state of rotation before suspension. Thus, unnecessary deflection of the sheet just in front of the registration roller pair can be prevented.

Abstract: A paper feeding device includes a pressing member, a restricting mechanism, and an interlocking mechanism. The pressing member is movable up and down between a pressing position and a release position. The pressing position causes a pressure to a paper sheet against the feed roller. The release position causes a release of the pressure. The restricting mechanism is movable between a restricting position and a removal position. The restricting position causes a restriction on moving up of the pressing member to the pressing position. The removal position causes a removal of the restriction. The interlocking mechanism is configured to move the restricting mechanism to the removal position in interlock with rotation of the feed roller.

Abstract: A sheet conveying device (30) includes a plurality of first conveyance rollers (31) and a plurality of second conveyance rollers (32). The sheet conveying device (30) includes stiffening rollers (34). The stiffening rollers (34) are disposed coaxially with at least one conveyance rollers (32) among the first and second conveyance rollers (31) and (32), and have diameters larger than diameters of the conveyance rollers (32). The stiffening rollers (34) includes first stiffening rollers (34a), which apply conveying forces to a sheet (P), and second stiffening rollers (34b), which apply smaller conveying forces to the sheet (P) than the conveying forces to the sheet (P) in the first stiffening rollers (34a).

Abstract: A sheet conveying device (30) includes a plurality of first conveyance rollers (31) and a plurality of second conveyance rollers (32). The sheet conveying device (30) includes stiffening rollers (34). The stiffening rollers (34) are disposed coaxially with at least one conveyance rollers (32) among the first and second conveyance rollers (31) and (32), and have diameters larger than diameters of the conveyance rollers (32). The stiffening rollers (34) includes first stiffening rollers (34a), which apply conveying forces to a sheet (P), and second stiffening rollers (34b), which apply smaller conveying forces to the sheet (P) than the conveying forces to the sheet (P) in the first stiffening rollers (34a).

Abstract: An image forming apparatus (100) includes a discharge section (210), a paper receiving tray (93), a first detecting section (211), a lever (220), a second detecting section (230) and a decision section (240). The first detecting section (211) is disposed in the discharge section (210), and detects a paper jam. The second detecting section (230) detects a swinging state of the lever (220) from a first position at which the lever (220) is not in the process of receiving an action of the paper sheet to a second position. The decision section (240) judges an occurrence factor in a paper jam to be a user-induced factor when the second detecting section (230) detects a state in which the lever is at the first position in a state where the first detecting section (211) detects the paper jam.

Abstract: A sheet transport apparatus includes a sheet transport portion that transports a sheet in a first transport direction and a second transport direction, a bending member that bends without breaking the sheet by corrugating the sheet in an orthogonal direction, and a restriction member that restricts, in a perpendicular direction, a corrugation in the sheet bent by the bending member. The restriction member is provided on an upstream side in the first transport direction of the bending member.