Patent application number | Description | Published |
20120091652 | SHEET CONVEYING APPARATUS AND IMAGE FORMING APPARATUS - A sheet conveying apparatus including, a conveying portion conveying a sheet; a rotation detection portion rotatably provided; a sensor portion detecting the conveyed sheet based on a rotational position of the rotation detection portion; a rotation transmission portion transmitting a rotational driving force to the rotation detection portion to rotate the rotation detection portion in a predetermined rotational direction after the rotation detection portion is rotated by being pushed by the leading end of the sheet; and an urging unit configured to apply an urging force to the rotation detection portion so that the rotation detection portion comes into contact with a surface of the sheet, thereafter the rotation detection portion is returned to a waiting position along with the passage of the rear end of the sheet through the rotation detection portion after the rotation detection portion is rotated by the rotational driving force of the rotation transmitting unit. | 04-19-2012 |
20120093554 | SHEET CONVEYING APPARATUS AND IMAGE FORMING APPARATUS - A sheet conveying apparatus includes: a conveying unit nipping a sheet in a nip portion to convey the sheet; a shutter unit rotated in a predetermined rotation direction by being pushed by the conveyed sheet to correct a skew of the sheet; a rotation transmitting unit configured to transmit a rotational driving force to the shutter unit to rotate the shutter unit in the predetermined rotation direction; and an urging unit configured to apply an urging force to the shutter unit so that the shutter unit comes into contact with a surface of the sheet, thereafter the shutter unit is returned to a waiting position along with the passage of a rear end of the sheet through the shutter unit after the shutter unit is rotated by the rotational driving force of the rotation transmitting unit. | 04-19-2012 |
20120181741 | SHEET DETECTING APPARATUS AND IMAGE FORMING APPARATUS - The present invention provides a sheet detecting apparatus that detects a sheet, the sheet detecting apparatus comprising: a lever member; a biasing portion that biases the lever member for a first position where the abutting surface abuts against the leading end of the sheet; a supporting mechanism that movably supports the lever member to move in an order of the first position, a second position to which the lever member moves by the sheet against the biasing force of the biasing member, and a third position where the lever member abuts on a surface of the sheet and waits in order to move to the first position when a trailing end of the sheet passes the lever member, while keeping a abutting surface of lever member facing upstream; an interlocking portion that interlocks with the lever member; and a detector that detects a position of the interlocking portion. | 07-19-2012 |
20120181744 | SHEET CONVEYING APPARATUS AND IMAGE FORMING APPARATUS - The present invention relates to a sheet conveying apparatus, comprising: a conveying portion conveying a sheet; a shutter member having an abutting surface for abutting the sheet to correct skew feeding; a biasing member for biasing the shutter member to position at a first position where the leading end abuts against the abutting surface; and a support mechanism which movably supports the shutter member to move in an order of the first position, a second position to which the shutter member moves by the sheet against biasing from the biasing member, and a third position where the shutter member abuts the sheet and stands by to move to the first position when a trailing end of the sheet passes the shutter member, while keeping the abutting surface facing upstream. | 07-19-2012 |
20120235350 | SHEET CONVEYING APPARATUS AND IMAGE FORMING APPARATUS - A sheet conveying apparatus, including: a first conveying portion; a second conveying portion arranged downstream of the first conveying portion; a shutter member rotated by the pressure of the sheet and including a plurality of abutment surfaces against which a leading edge of the sheet conveyed by the first conveying portion abuts to correct a skew feed of the sheet; and an urging portion which provides the shutter member with an urging force for positioning one abutment surface at an abutment position at which the leading edge of the sheet abuts against the one abutment surface, the urging portion providing the shutter member with an urging force for rotating the shutter member to position another abutment surface at the abutment position after the leading edge of the sheet is nipped by the second conveying portion. | 09-20-2012 |
20120237280 | SHEET DETECTING APPARATUS AND IMAGE FORMING APPARATUS - A sheet detecting apparatus including: a sheet detecting member having a plurality of abutment surfaces in a peripheral direction thereof, the sheet detecting member being rotated by a conveyed sheet abutting against one of the plurality of abutment surfaces; a detection portion which operates in association with the sheet detecting member; a sensor which generates a signal based on a position of the detection portion; and an urging portion which generates an urging force for positioning the one of the plurality of abutment surfaces of the sheet detecting member in a waiting position in which the leading edge of a sheet conveyed by a conveying portion abuts against the one of the plurality of abutment surfaces, and thereafter the urging portion switching the urging force to an urging force for positioning, in the waiting position, another one of the plurality of abutment surfaces against which a succeeding sheet abuts. | 09-20-2012 |
20130134654 | SHEET CONVEYING APPARATUS AND IMAGE FORMING APPARATUS - A sheet conveying apparatus including, a conveying portion conveying a sheet; a rotation detection portion rotatably provided; a sensor portion detecting the conveyed sheet based on a rotational position of the rotation detection portion; a rotation transmission portion transmitting a rotational driving force to the rotation detection portion to rotate the rotation detection portion in a predetermined rotational direction after the rotation detection portion is rotated by being pushed by the leading end of the sheet; and an urging unit configured to apply an urging force to the rotation detection portion so that the rotation detection portion comes into contact with a surface of the sheet, thereafter the rotation detection portion is returned to a waiting position along with the passage of the rear end of the sheet through the rotation detection portion after the rotation detection portion is rotated by the rotational driving force of the rotation transmitting unit. | 05-30-2013 |
20130214480 | SHEET CONVEYING APPARATUS AND IMAGE FORMING APPARATUS - A sheet conveying apparatus, including: a first conveying portion; a second conveying portion arranged downstream of the first conveying portion; a shutter member rotated by the pressure of the sheet and including a plurality of abutment surfaces against which a leading edge of the sheet conveyed by the first conveying portion abuts to correct a skew feed of the sheet; and an urging portion which provides the shutter member with an urging force for positioning one abutment surface at an abutment position at which the leading edge of the sheet abuts against the one abutment surface, the urging portion providing the shutter member with an urging force for rotating the shutter member to position another abutment surface at the abutment position after the leading edge of the sheet is nipped by the second conveying portion. | 08-22-2013 |
20140210163 | SHEET STORAGE APPARATUS AND IMAGE FORMING APPARATUS - A sheet storage apparatus for storing sheets including a sheet storage unit including a lower guide configured to guide a lower surface of the conveyed sheet, an upper guide configured to guide an upper surface of the conveyed sheet, and a shutting-off unit provided in one of the lower guide and the upper guide, configured to be movable around a rotational axis and between a shutting-off position at which a downstream end of the conveying direction of the sheet stored in the sheet storage unit is shut off and a retracting position for retracting from the shutting-off position, and a plurality of stages of sheet storage units is vertically stacked and at least a part of the shutting-off unit overlaps the rotational axis of the adjacent sheet storage unit in a vertical direction at the shutting-off position. | 07-31-2014 |
20140233992 | IMAGE FORMING APPARATUS - An image forming apparatus includes: a fixing portion for fixing an image formed on a recording material; and a guide member for guiding the recording material. The guide member is provided at an entrance to the fixing portion and at an end portion with respect to a direction perpendicular to a feeding direction of the recording material The guide member is moved when the guide member is pushed by the recording material. | 08-21-2014 |
20140339764 | SHEET STACKING APPARATUS, SHEET STORING APPARATUS, AND IMAGE FORMING APPARATUS - A sheet stacking apparatus for stacking a sheet includes a plurality of sheet stacking units, each of which includes a stacking member, a pushing unit, and a drive transmission unit. The plurality of sheet stacking units are lapped over one another in a sheet thickness direction. The stacking member stacks thereon a sheet conveyed by a conveyance member. The pushing unit pushes an edge of a sheet stacked on the stacking member to move the sheet. The drive transmission unit transmits, to the pushing unit, a drive force generated by a drive source for driving the pushing unit. The drive transmission unit is located outside the stacking member in a direction perpendicular to a direction in which the pushing unit moves the sheet. | 11-20-2014 |
20140339765 | SHEET STACKING APPARATUS, SHEET STORING APPARATUS, AND IMAGE FORMING APPARATUS - A sheet stacking apparatus for stacking a sheet includes a plurality of sheet stacking units, an engaging member, and a first and second moving unit. The plurality of sheet stacking units are lapped over one another in a sheet thickness direction and each includes a stacking member that stacks a sheet thereon, a contact member that contacts an edge of a sheet stacked on the stacking member, the contact member being mounted to be movable to move the sheet stacked on the stacking member, and a contact engaged member mounted to be movable integrally with the contact member. The engaging member engages with the contact engaged member. The first moving unit moves the engaging member to engage the engaging member with the contact engaged member, and moves the contact member together with the contact engaged member. The second moving unit moves the engaging member in the sheet thickness direction. | 11-20-2014 |