Abstract: An image forming apparatus includes an image forming portion, a belt unit including a cleaning unit and an opposing roller, and a swinging mechanism. The swinging mechanism includes a swingable member which is provided in a position different from a rotation center of the opposing roller while holding the opposing roller and the cleaning unit without changing a relative positional relationship between the opposing roller and the cleaning unit and which is swingable about a swing axis.

Abstract: An image forming apparatus includes an image forming portion, a belt unit including a cleaning unit and an opposing roller, and a swinging mechanism. The swinging mechanism includes a swingable member which is provided in a position different from a rotation center of the opposing roller while holding the opposing roller and the cleaning unit without changing a relative positional relationship between the opposing roller and the cleaning unit and which is swingable about a swing axis.

Abstract: An image forming apparatus includes a support frame, a driving device including a first supporting portion configured to hold the drive source on a first surface and configured to rotatably support the drive gear on a second surface, and a second supporting portion configured to support the drive gear with the first supporting portion, a board holding member disposed in a manner overlapping the first supporting portion in a rotational axis direction of the drive gear, and a third supporting portion disposed between the first supporting portion and the board holding member in the rotational axis direction, and configured to support the board holding member, one end of the third supporting portion being fixed to a side of the first surface of the first supporting portion by a first fastening member, another end of the third supporting portion being fixed to the board holding member by a second fastening member.

Abstract: An image forming apparatus includes a driving unit including a driving source, a drive gear, a first support member that holds the driving source and includes a first support portion that supports one end portion of a rotation shaft of the drive gear, and a second support member that includes a second support portion that supports another end portion of the rotating shaft. The first support member includes a fastening hole disposed in a projection plane obtained by projecting the second support portion in the rotation axis direction of the drive gear. The second support member is disposed upstream of the first support member in a fastening direction, and includes a mounting portion extending so as to be in contact with the first support portion in the projection plane, the mounting portion including an attachment hole, the attachment hole being disposed at a position overlapping the fastening hole.

Abstract: An image forming apparatus includes an image forming portion, a belt unit including a cleaning unit and an opposing roller, and a swinging mechanism. The swinging mechanism includes a swingable member which is provided in a position different from a rotation center of the opposing roller while holding the opposing roller and the cleaning unit without changing a relative positional relationship between the opposing roller and the cleaning unit and which is swingable about a swing axis.

Abstract: An image forming apparatus includes a support frame, a driving device including a first supporting portion configured to hold the drive source on a first surface and configured to rotatably support the drive gear on a second surface, and a second supporting portion configured to support the drive gear with the first supporting portion, a board holding member disposed in a manner overlapping the first supporting portion in a rotational axis direction of the drive gear, and a third supporting portion disposed between the first supporting portion and the board holding member in the rotational axis direction, and configured to support the board holding member, one end of the third supporting portion being fixed to a side of the first surface of the first supporting portion by a first fastening member, another end of the third supporting portion being fixed to the board holding member by a second fastening member.

Abstract: An image forming apparatus includes a driving unit including a driving source, a drive gear, a first support member that holds the driving source and includes a first support portion that supports one end portion of a rotation shaft of the drive gear, and a second support member that includes a second support portion that supports another end portion of the rotating shaft. The first support member includes a fastening hole disposed in a projection plane obtained by projecting the second support portion in the rotation axis direction of the drive gear. The second support member is disposed upstream of the first support member in a fastening direction, and includes a mounting portion extending so as to be in contact with the first support portion in the projection plane, the mounting portion including an attachment hole, the attachment hole being disposed at a position overlapping the fastening hole.

Abstract: A position of a stretch roller, where the stretch roller stretches an intermediate transfer belt upstream of and adjacently to a most upstream primary transfer roller in a rotational direction of the intermediate transfer belt, is apart from a photosensitive drum with respect to a primary transfer surface. Further, the most upstream primary transfer roller is larger in outside diameter than other primary transfer rollers, and the most upstream primary transfer roller has a transfer pressure larger than the transfer pressure of the other primary transfer rollers. This arrangement inhibits the most upstream primary transfer roller from deforming and a defective transfer due to waving of the intermediate transfer belt, while inhibiting an increase in size of an apparatus.

Abstract: A position of a stretch roller, where the stretch roller stretches an intermediate transfer belt upstream of and adjacently to a most upstream primary transfer roller in a rotational direction of the intermediate transfer belt, is apart from a photosensitive drum with respect to a primary transfer surface. Further, the most upstream primary transfer roller is larger in outside diameter than other primary transfer rollers, and the most upstream primary transfer roller has a transfer pressure larger than the transfer pressure of the other primary transfer rollers. This arrangement inhibits the most upstream primary transfer roller from deforming and a defective transfer due to waving of the intermediate transfer belt, while inhibiting an increase in size of an apparatus.

Abstract: A position of a stretch roller, where the stretch roller stretches an intermediate transfer belt upstream of and adjacently to a most upstream primary transfer roller in a rotational direction of the intermediate transfer belt, is apart from a photosensitive drum with respect to a primary transfer surface. Further, the most upstream primary transfer roller is larger in outside diameter than other primary transfer rollers, and the most upstream primary transfer roller has a transfer pressure larger than the transfer pressure of the other primary transfer rollers. This arrangement inhibits the most upstream primary transfer roller from deforming and a defective transfer due to waving of the intermediate transfer belt, while inhibiting an increase in size of an apparatus.

Abstract: A position of a stretch roller, where the stretch roller stretches an intermediate transfer belt upstream of and adjacently to a most upstream primary transfer roller in a rotational direction of the intermediate transfer belt, is apart from a photosensitive drum with respect to a primary transfer surface. Further, the most upstream primary transfer roller is larger in outside diameter than other primary transfer rollers, and the most upstream primary transfer roller has a transfer pressure larger than the transfer pressure of the other primary transfer rollers. This arrangement inhibits the most upstream primary transfer roller from deforming and a defective transfer due to waving of the intermediate transfer belt, while inhibiting an increase in size of an apparatus.

Abstract: It is an object to provide a cylindrical molded article that can inhibit the transmission of components having SP values in a relatively wide range. A cylindrical molded article having a cylindrical resin layer I comprising a vinylidene chloride copolymer; and a cylindrical resin layer II disposed inside the resin layer I and comprising a resin having an SP value of 12.0 (cal/cm3)1/2 or more, and having a total thickness of 100 ?m or more.

Abstract: A sheet processing apparatus that processes sheets transported in a transport direction and stacked on a tray, including: a sheet moving device configured to be brought into contact with an upper surface of a sheet stacked on the tray and to be moved in a width direction intersecting with the transport direction to move the sheet in the width direction; an alignment member against which a side edge of the sheet moved in the width direction by the sheet moving device is brought into abutment, to align the sheet; and a guide member configured to hold down the sheet between the sheet moving device and the alignment member with the sheet moving device in contact with the upper surface of the sheet, wherein the guide member is moved integrally with the sheet moving device in the width direction.

Abstract: A sheet processing apparatus that processes sheets transported in a transport direction and stacked on a tray, including: a sheet moving device configured to be brought into contact with an upper surface of a sheet stacked on the tray and to be moved in a width direction intersecting with the transport direction to move the sheet in the width direction; an alignment member against which a side edge of the sheet moved in the width direction by the sheet moving device is brought into abutment, to align the sheet; and a guide member configured to hold down the sheet between the sheet moving device and the alignment member with the sheet moving device in contact with the upper surface of the sheet, wherein the guide member is moved integrally with the sheet moving device in the width direction.