Abstract: An image forming apparatus includes an image forming unit, a developer replenishing device, a fixing device, a press-contact adjustment mechanism, first and second driving transmission mechanisms, and a driving switching mechanism. The image forming unit forms a developer image on a recording medium. The developer replenishing device and the fixing device are detachable. The developer replenishing device replenishes a developer. The fixing device includes first and second rotation members. The second rotation member faces the first rotation member. The fixing device fixes the developer image to the recording medium. The press-contact adjustment mechanism adjusts a press-contact state between the first and second rotation members. The first driving transmission mechanism transmits a driving force to the press-contact adjustment mechanism. The second driving transmission mechanism transmits a driving force to the developer replenishing device.

Abstract: An apparatus includes: an image forming portion that forms an image on a medium; a fixing device removably mounted to an apparatus body to fix the image to the medium, the fixing device including a first rotator that contacts the medium, a second rotator that contacts the first rotator, a movable member movable in first and second directions in which the first and second rotators are moved closer to and away from each other, respectively, an urging member, a first end of which is mounted to the movable member and which urges the movable member in the first direction, and a first support portion that supports a second end of the urging member; a cam member that moves the movable member in the second direction; a shaft member to which the cam member is mounted; and a second support portion that supports the shaft member and the first support portion.

Abstract: A fixing device includes a heating unit, an endless belt body that follows rotation of the heating unit, and a pressing unit that faces the heating unit with the endless belt body interposed therebetween. The pressing unit includes a retaining body that rotatably retains the endless belt body, a pressing-area-forming portion that is a part of the retaining body, and a pressing member provided on an upstream side of the retaining body with respect to the pressing-area-forming portion in a direction of rotation of the endless belt body, the pressing member being a metal plate that is bent along a line extending in a longitudinal direction thereof. The pressing unit is movable relative to the heating unit between a position where a pressing area is formed by the pressing-area-forming portion and the pressing member and a position where the pressing area is formed by the pressing member.

Abstract: A fixing device includes a heating unit, an endless belt body that follows rotation of the heating unit, and a pressing unit that faces the heating unit with the endless belt body interposed therebetween. The pressing unit includes a retaining body that rotatably retains the endless belt body, a pressing-area-forming portion that is a part of the retaining body, and a pressing member provided on an upstream side of the retaining body with respect to the pressing-area-forming portion in a direction of rotation of the endless belt body, the pressing member being a metal plate that is bent along a line extending in a longitudinal direction thereof. The pressing unit is movable relative to the heating unit between a position where a pressing area is formed by the pressing-area-forming portion and the pressing member and a position where the pressing area is formed by the pressing member.

Abstract: An image forming apparatus includes an image forming portion and a fixing device. The image forming portion forms a developer image on a recording medium. The fixing device is removably mounted to an image forming apparatus body, and fixes the developer image formed by the image forming portion to the recording medium. The fixing device includes a first rotator, a second rotator, and a pressing mechanism. The second rotator contacts the first rotator to form an interposition region in which the recording medium is interposed between the first rotator and the second rotator. The pressing mechanism presses the first rotator and the second rotator against each other. The image forming apparatus further includes a change mechanism that changes a force with which the pressing mechanism presses the first rotator and the second rotator against each other. The change mechanism is mounted to the image forming apparatus body.

Abstract: An image forming apparatus includes an image forming portion and a fixing device. The image forming portion forms a developer image on a recording medium. The fixing device is removably mounted to an image forming apparatus body, and fixes the developer image formed by the image forming portion to the recording medium. The fixing device includes a first rotator, a second rotator, and a pressing mechanism. The second rotator contacts the first rotator to form an interposition region in which the recording medium is interposed between the first rotator and the second rotator. The pressing mechanism presses the first rotator and the second rotator against each other. The image forming apparatus further includes a change mechanism that changes a force with which the pressing mechanism presses the first rotator and the second rotator against each other. The change mechanism is mounted to the image forming apparatus body.

Abstract: A fixing device includes a first rotary member; a second rotary member that is in contact with the first rotary member and presses a recording medium passing therethrough; a heating member that heats a contact area; a first support member supporting the first rotary member from inside so as to be in contact with the second rotary member; a second support member supporting the first support member and switchable between states in which it is in contact with and separated from the first support member; a first urging-force applying member attached to the second support member and urging the second and first support members against the second rotary member; a second urging-force applying member disposed between the first and second support members; and a switching member via which the first and second support members are switched between states in which they are in contact with and separated from each other.

Abstract: A fixing device includes first and second contact bodies that apply a pressure to a recording medium to fix an unfixed image on the recording medium; a pressing member that is movable between a first position at which the pressing member is in contact with the first contact body and a second position at which the pressing member is separated from the first contact body; a first urging member that urges the pressing member to apply a force to the first contact body; a guide member that controls a direction in which the first contact body moves; a second urging member that is interposed between the pressing member and the guide member and that urges the guide member to apply a force to the first contact body; and a changer that selectively changes a position of the pressing member between the first and second positions.

Abstract: Provided is a fixing device including a fixing member that fixes toner onto a recording material, a pressurizing member that forms a nip portion, through which the recording material passes, between the fixing member and the pressurizing member, a moving member that is disposed to be movable in response to passage of the recording material in a transport path of the recording material which passes through the nip portion, a detection unit that detects a presence or absence of the moving member, a displacement mechanism that changes a position of the pressurizing member with respect to the fixing member, and an attachment/detachment member that is disposed in a detachable manner at a facing position facing the displacement mechanism and comes into contact with the moving member.

Abstract: Provided is a fixing device including a fixing member that fixes toner to a recording material, a pressurizing member that forms a nip portion through which the recording material passes between the fixing member and the pressurizing member, a contacting and separating mechanism that contacts and separates the pressurizing member with and from the fixing member, and a pressure adjusting mechanism that is provided capable of advancing to and retreating from a region that moves along with contacting and separating of the pressurizing member with and from the fixing member by the contacting and separating mechanism while moving along a straight line direction, and adjusts a pressure in the nip portion by contacting the contacting and separating mechanism in the region.

Abstract: Provided is a fixing device including a fixing member that fixes toner onto a recording material, a pressurizing member that forms a nip portion, through which the recording material passes, between the fixing member and the pressurizing member, a moving member that is disposed to be movable in response to passage of the recording material in a transport path of the recording material which passes through the nip portion, a detection unit that detects a presence or absence of the moving member, a displacement mechanism that changes a position of the pressurizing member with respect to the fixing member, and an attachment/detachment member that is disposed in a detachable manner at a facing position facing the displacement mechanism and comes into contact with the moving member.

Abstract: Provided is a fixing device including a fixing member that fixes toner to a recording material, a pressurizing member that forms a nip portion through which the recording material passes between the fixing member and the pressurizing member, a contacting and separating mechanism that contacts and separates the pressurizing member with and from the fixing member, and a pressure adjusting mechanism that is provided capable of advancing to and retreating from a region that moves along with contacting and separating of the pressurizing member with and from the fixing member by the contacting and separating mechanism while moving along a straight line direction, and adjusts a pressure in the nip portion by contacting the contacting and separating mechanism in the region.

Abstract: A fixing device includes: a fixing member that transports a recording medium on which a toner image has been transferred to fix the toner image to the recording medium; an endless belt member that rotates with a front surface of the belt member contacting the fixing member; a guide member that guides the belt member to a contact portion at which the belt member and the fixing member contact each other; plural rotational-direction projections formed on a guide surface of the guide member facing a back surface of the belt member and disposed at intervals in a rotational axis direction of the belt member, the rotational-direction projections extending in a rotational direction of the belt member and projecting toward the back surface; and an intersecting-direction projection formed on the guide surface, the intersecting-direction projection extending along an intersecting direction that intersects the rotational-direction projections and projecting toward the back surface.

Abstract: A fixing device includes a solid or hollow cylindrical heating member that heats a recording medium and has recesses or projections provided at axial ends thereof, over the entire outer circumferences; ring-shaped heat insulating members to be fitted to the axial ends of the heating member, the ring-shaped heat insulating members having, in the inner circumferences thereof, projections or recesses that fit into or receive the recesses or projections provided on the heating member; and bearings that rotatably support the axial ends of the heating member via the heat insulating members.

Abstract: A fixing device includes a heat member that includes a heat portion and rotates in a circumferential direction; a pressure member that faces the heat member and fixes a toner image transferred on a sheet to the sheet by applying pressure when the heat member applies heat; and first and second housing chambers that house electric wires, that are spaces isolated from the heat member and the pressure member, and that respectively have first and second openings being open to the outside in the circumferential direction and being covered with lid members, the electric wires being respectively arranged through the first and second openings, the second housing chamber being formed separately from the first housing chamber, the second opening being open in a direction different from a direction of the first opening.

Abstract: A fixing device includes a solid or hollow cylindrical heating member that heats a recording medium and has recesses or projections provided at axial ends thereof, over the entire outer circumferences; ring-shaped heat insulating members to be fitted to the axial ends of the heating member, the ring-shaped heat insulating members having, in the inner circumferences thereof, projections or recesses that fit into or receive the recesses or projections provided on the heating member; and bearings that rotatably support the axial ends of the heating member via the heat insulating members.

Abstract: A fixing device includes: a fixing member that transports a recording medium on which a toner image has been transferred to fix the toner image to the recording medium; an endless belt member that rotates with a front surface of the belt member contacting the fixing member; a guide member that guides the belt member to a contact portion at which the belt member and the fixing member contact each other; plural rotational-direction projections formed on a guide surface of the guide member facing a back surface of the belt member and disposed at intervals in a rotational axis direction of the belt member, the rotational-direction projections extending in a rotational direction of the belt member and projecting toward the back surface; and an intersecting-direction projection formed on the guide surface, the intersecting-direction projection extending along an intersecting direction that intersects the rotational-direction projections and projecting toward the back surface.

Abstract: An image forming apparatus includes: an image forming apparatus main body; an opening and closing part that is attached to the image forming apparatus main body in an openable and closeable manner; and a fixing device that is removably installed in the image forming apparatus main body to fix a developer image onto a recording medium, the opening and closing part being provided with an engaging portion to engage with an engaged portion defined on the image forming apparatus main body, and the engaging portion including a pressing part that presses the fixing device toward a proper position when a part of the fixing device is positioned in a movement locus of the engaging portion during a closing movement of the opening and closing part.

Abstract: A fixing device includes a heat member that includes a heat portion and rotates in a circumferential direction; a pressure member that faces the heat member and fixes a toner image transferred on a sheet to the sheet by applying pressure when the heat member applies heat; and first and second housing chambers that house electric wires, that are spaces isolated from the heat member and the pressure member, and that respectively have first and second openings being open to the outside in the circumferential direction and being covered with lid members, the electric wires being respectively arranged through the first and second openings, the second housing chamber being formed separately from the first housing chamber, the second opening being open in a direction different from a direction of the first opening.

Abstract: A conveyance device includes: a rotary member that rotates; a driven member that rotates in accordance with the rotary member and conveys a conveyed material while holding the conveyed material between the driven member and the rotary member; a guide part provided on an upstream side from a rotary shaft of the driven member in a conveyance direction of the conveyed material, that guides the driven member toward the rotary member; and a support member that brings the rotary shaft of the driven member into contact with the guide part, and along with the guide part, supports the rotary shaft.