Abstract: The sheet conveyance apparatus includes an apparatus body including a conveyance portion, and a door portion pivotally supported around a pivot axis disposed in a lower portion of the apparatus body. The apparatus body includes a holding member including a first holding portion used to lift the apparatus body, and the holding member is disposed inside a width of the door portion in an axis direction of the pivot axis. The holding member includes a first engaging portion and a second engaging portion disposed on the pivot axis. The door portion includes a first engaged portion configured to engage with the first engaging portion, and a second engaged portion configured to engage with the second engaging portion. The door portion is pivotably supported around the first engaging portion and the second engaging portion with respect to the holding member.

Abstract: A driving force transmission device includes a drive gear, a driven gear, which includes a gear portion and a partially toothless gear portion, rotates by the gear portion meshing with the drive gear, stops rotating in response to the partially toothless gear portion facing the drive gear, a first cam member and a second cam member which operate in conjunction with the driven gear, a first elastic member for urging the first cam member, a follower member to which urging force is applied by a second elastic member and which is moved by the second cam member, and a contact portion for coming into contact with the first cam member by urging force of the first elastic member. The first cam member includes a home cam surface for coming into contact with the contact portion so that rotation of the driven gear is limited.

Abstract: A sheet feeding apparatus includes an apparatus body, a sheet supporting portion configured to be movably supported between a sheet supporting position and a first storage position, and a sheet feed unit including a sheet feed portion, and an abutment member, the sheet feed unit being movably supported among a sheet feed position, a waiting position, and a second storage position. The sheet feed unit is positioned in the sheet feed position or the waiting position in a case where the sheet supporting portion is positioned in the sheet supporting position. The sheet feed unit is positioned in the second storage position in a case where the sheet supporting portion is positioned in the first storage position. The abutment member moves so as to be stored in the apparatus body in a case where the sheet feed unit moves from the waiting position to the second storage position.

Abstract: A sheet feeding apparatus includes an apparatus body, an opening/closing member supported on the apparatus body, a sheet support supported on the opening/closing member, and a rotary feeding member provided on the apparatus body to feed the sheet supported on the sheet support in a feeding direction. A first engagement member is provided in the apparatus body, and a second engagement member is provided on a downstream end portion of the sheet support in the feeding direction and engages with the first engagement member in a vertical direction that intersects an axial direction of the rotary feeding member when the opening/closing member is positioned at the open position. The rotary feeding member is lowered toward the sheet supported on the sheet support in a case where the opening/closing member is positioned at the open position.

Abstract: A sheet supporting apparatus includes a positioning device to position a regulating portion to a sheet support. The positioning device includes a first group of teeth provided on the sheet support, a second group of teeth disposed at a position different from the first group of teeth provided on the sheet support, a third group of teeth provided on a regulator and capable of transiting to a first state of engaging with the first group of teeth and to a second state of engaging with less area of the first group of teeth than that in the first state, and a fourth group of teeth provided on the regulator and capable of transiting to a third state of engaging with the second group of teeth and to a fourth state of engaging with less area of the second group of teeth than that in the third state.

Abstract: A sheet feeding apparatus includes an urging mechanism configured to urge a holding member such that a feeding member is brought into contact with an upper surface of a sheet loaded on a sheet loading member by the holding member. The urging mechanism includes a swinging member, a pressing member, and an urging member. The urging mechanism is configured to urge the holding member such that (i) a force by which the feeding member presses an upper surface of a sheet in a first state in which a distance between a loading surface and the feeding member is a first distance is larger than (ii) a force by which the feeding member presses an upper surface of a sheet in a second state in which the distance between the loading surface and the feeding member is a second distance longer than the first distance.

Abstract: A driving force transmission device includes a drive gear, a driven gear, which includes a gear portion and a partially toothless gear portion, rotates by the gear portion meshing with the drive gear, stops rotating in response to the partially toothless gear portion facing the drive gear, a first cam member and a second cam member which operate in conjunction with the driven gear, a first elastic member for urging the first cam member, a follower member to which urging force is applied by a second elastic member and which is moved by the second cam member, and a contact portion for coming into contact with the first cam member by urging force of the first elastic member. The first cam member includes a home cam surface for coming into contact with the contact portion so that rotation of the driven gear is limited.

Abstract: A sheet feeding apparatus includes an apparatus body, an opening/closing portion supported on the apparatus body, a sheet supporting portion supported on the opening/closing portion and configured to support a sheet, a rotary feeding member provided on the apparatus body and configured to feed the sheet supported on the sheet supporting portion in a feeding direction, a first engagement portion provided on the apparatus body, and a second engagement portion provided on a downstream end portion of the sheet supporting portion in the feeding direction, the second engagement portion being configured to engage with the first engagement portion in an intersecting direction that intersects an axial direction of the rotary feeding member in a state where the opening/closing portion is positioned at the open position.

Abstract: A sheet supporting apparatus includes a sheet supporting portion, a regulating portion, and a positioning unit, wherein the positioning unit includes first and second teeth portions provided on the sheet supporting portion, a third teeth portion provided on the regulating portion and being capable of transiting to a first state and to a second state, a fourth teeth portion provided on the regulating portion and being capable of transiting to a third state and to a fourth state, and an operating portion configured to cause a force which the fourth teeth portion receives from the second teeth portion to act as a force in a direction in which the third teeth portion engages with the first teeth portion.

Abstract: A sheet conveying apparatus includes a rotation member unit, a supporting shaft and a moving shaft to support the rotation member unit, a locking unit to lock the moving shaft, and an engaged portion. The rotation member unit includes an engaging portion and a sheet conveyance rotation member held by the engaging portion. When the moving shaft is at a first position, the moving shaft and the supporting shaft support the rotation member unit. When the moving shaft is moved away from the supporting shaft to a second position at which the rotation member unit is not supported by the supporting shaft, the moving shaft is locked at the second position by the locking unit after moving from the first position to the second position, and the rotation member unit is held by the engaged portion in a state in which the engaging portion engages with the engaged portion.

Abstract: A sheet conveying apparatus includes a rotation member unit, a supporting shaft, and a moving shaft to detach the rotation member unit supported by the supporting shaft and the moving shaft. The rotation member unit includes a conveyance rotation member to convey a sheet, and a holding member including an engaging portion to engage with an engaged portion provided to a sheet conveying apparatus main body in a direction perpendicular to the supporting shaft axial direction. The supporting shaft supports one end side of the rotation member unit in the axial direction and the moving shaft supports another end side of the rotation member unit in the axial direction and moves in the axial direction. When the engaging portion engages with the engaged portion when the rotation member unit is not supported by the supporting shaft and the moving shaft, the rotation member unit is held by the engaged portion.

Abstract: A sheet feeding apparatus includes a sheet presence/absence detection sensor configured to detect presence or absence of a sheet on a stacking device, a sheet surface detection sensor configured to detect that a stacking tray is raised to enable a sheet to be fed, a separation cam, and a control unit. The control unit is configured to determine that the mounting state of a feeding holder to a holder support unit is defective when the sheet surface detection sensor detects that the sheet can be fed when the sheet presence/absence detection sensor detects absence of a sheet before sheet feeding processing by a pickup roller.

Abstract: A sheet feeding apparatus includes a sheet support portion to support a sheet, an ascending portion to raise the sheet support portion, a feeding portion to feed the sheet, a moving portion to move the feeding portion between a separated position and a feeding position, a holding portion to move between a holding position and an allowing position, a drive source, and a transmission unit including a first transmission portion to transmit the driving force to the ascending portion and a second transmission portion to transmit the driving force to the holding portion.

Abstract: A sheet supporting apparatus includes a sheet supporting portion, a regulation member, a flag portion, a detection portion, and a holding portion con. At the holding position, the holding portion supports the flag portion at the upper position in a case where the sheet supporting portion is positioned at the first position, and, at the allowing position, the holding portion allows movement of the flag portion to the lower position in a case where the sheet supporting portion is positioned at the second position. A lower end of the flag portion is positioned above the regulation surface in a case where the flag portion is positioned at the upper position, and is positioned below the regulation surface in a case where the flag portion is positioned at the lower position.

Abstract: A sheet supporting apparatus includes a body, a supporting portion configured to be held in an elevating manner by the body and to support a sheet, a sheet regulation portion regulating a position of the sheet supported on the supporting portion, a movement portion capable of moving between a first position where the sheet regulation portion regulates the position of the sheet supported on the supporting portion, and a second position where the supporting portion is regulated from elevating with respect to the body, and a movement regulation unit regulating the movement portion from moving to the second position.

Abstract: A sheet feeding apparatus includes a sheet presence/absence detection sensor configured to detect presence or absence of a sheet on a stacking device, a sheet surface detection sensor configured to detect that a stacking tray is raised to enable a sheet to be fed, a separation cam, and a control unit. The control unit is configured to determine that the mounting state of a feeding holder to a holder support unit is defective when the sheet surface detection sensor detects that the sheet can be fed when the sheet presence/absence detection sensor detects absence of a sheet before sheet feeding processing by a pickup roller.

Abstract: A sheet feeding apparatus includes a sheet support portion configured to support a sheet, an ascending portion configured to cause the sheet support portion to ascend, a feeding portion configured to feed the sheet, a moving portion configured to support the feeding portion such that the feeding portion is movable between a separated position and a feeding position below the separated position, a holding portion configured to move between a holding position and an allowing position, a drive source, and a transmission unit including a first transmission portion configured to transmit the driving force to the ascending portion and a second transmission portion configured to transmit the driving force to the holding portion. The holding portion moves toward the allowing position in a case where the driving force is transmitted to the ascending portion and the holding portion respectively through the first transmission portion and the second transmission portion.

Abstract: A sheet supporting apparatus includes a sheet supporting portion, a regulation member, a flag portion, a detection portion, and a holding portion con. At the holding position, the holding portion supports the flag portion at the upper position in a case where the sheet supporting portion is positioned at the first position, and, at the allowing position, the holding portion allows movement of the flag portion to the lower position in a case where the sheet supporting portion is positioned at the second position. A lower end of the flag portion is positioned above the regulation surface in a case where the flag portion is positioned at the upper position, and is positioned below the regulation surface in a case where the flag portion is positioned at the lower position.

Abstract: A sheet conveying apparatus includes a rotation member unit, a supporting shaft and a moving shaft to support the rotation member unit, a locking unit to lock the moving shaft, and an engaged portion. The rotation member unit includes an engaging portion and a sheet conveyance rotation member held by the engaging portion. When the moving shaft is at a first position, the moving shaft and the supporting shaft support the rotation member unit. When the moving shaft is moved away from the supporting shaft to a second position at which the rotation member unit is not supported by the supporting shaft, the moving shaft is locked at the second position by the locking unit after moving from the first position to the second position, and the rotation member unit is held by the engaged portion in a state in which the engaging portion engages with the engaged portion.

Abstract: A sheet conveying apparatus includes a rotation member unit, a supporting shaft, and a moving shaft to detach the rotation member unit supported by the supporting shaft and the moving shaft. The rotation member unit includes a conveyance rotation member to convey a sheet, and a holding member including an engaging portion to engage with an engaged portion provided to a sheet conveying apparatus main body in a direction perpendicular to the supporting shaft axial direction. The supporting shaft supports one end side of the rotation member unit in the axial direction and the moving shaft supports another end side of the rotation member unit in the axial direction and moves in the axial direction. When the engaging portion engages with the engaged portion when the rotation member unit is not supported by the supporting shaft and the moving shaft, the rotation member unit is held by the engaged portion.