WO2020183744A1 - Image forming apparatus - Google Patents

Image forming apparatus Download PDF

Info

Publication number
WO2020183744A1
WO2020183744A1 PCT/JP2019/023243 JP2019023243W WO2020183744A1 WO 2020183744 A1 WO2020183744 A1 WO 2020183744A1 JP 2019023243 W JP2019023243 W JP 2019023243W WO 2020183744 A1 WO2020183744 A1 WO 2020183744A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
frame
intermediate transfer
transfer belt
image forming
Prior art date
Application number
PCT/JP2019/023243
Other languages
French (fr)
Japanese (ja)
Inventor
篤 深谷
板橋　奈緒
Original Assignee
ブラザー工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ブラザー工業株式会社 filed Critical ブラザー工業株式会社
Publication of WO2020183744A1 publication Critical patent/WO2020183744A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit

Definitions

  • the present disclosure relates to an image forming apparatus including a drum cartridge and a developing cartridge that can be attached to and detached from the main body housing.
  • an image forming apparatus has been known in which a drum cartridge and a developing cartridge can be individually attached to and detached from the main body housing (see Patent Document 1).
  • the drum cartridge and the developing cartridge are removable in the axial direction of the photosensitive drum. Then, when the cover is closed after the drum cartridge and the developing cartridge are attached to the main body housing, the drum cartridge and the developing cartridge move with respect to the intermediate transfer belt.
  • a drum cartridge has a contact that is electrically connected to an IC chip, a charging roller, or the like.
  • the main body housing includes main body contacts that the contacts of the drum cartridge come into contact with when the drum cartridge is mounted on the main body housing.
  • the contacts of the drum cartridge will be in sliding contact with the main body contacts of the main body housing when the drum cartridge is moved with respect to the intermediate transfer belt. , The contacts of the drum cartridge may wear out.
  • An object of the present disclosure is to provide an image forming apparatus capable of suppressing wear of the contacts of a drum cartridge.
  • the image forming apparatus includes a main body housing having an opening, a cover that can move between an open position for opening the opening and a closed position for closing the opening, and a first direction.
  • a drum cartridge having a photosensitizing drum and a contact that can be rotated about a first axis extending from the first axis, a developing cartridge having a developing roller that can rotate about the second axis extending in the first direction, and the drum cartridge and the developing cartridge
  • the drum cartridge including the drum cartridge, the belt unit including the intermediate transfer belt located above the developing cartridge, and the separation lift when mounted on the main body housing is the main body housing in the first direction. It is removable.
  • the developing cartridge can be attached to and detached from the main body housing in the first direction.
  • the intermediate transfer belt can be moved with respect to the photosensitive drum with the drum cartridge attached to the main body housing.
  • the separation lift is located in the first position when the cover is in the open position and in the second position when the cover is in the closed position.
  • the intermediate transfer belt is characterized in that it separates from the photosensitive drum when the separation lift is located at the first position and comes into contact with the photosensitive drum when the separation lift is located at the second position. ..
  • the intermediate transfer belt can be moved with respect to the photosensitive drum, so that the drum cartridge does not move with respect to the main body housing. Therefore, it is possible to prevent the contacts of the drum cartridge from being worn.
  • the intermediate transfer belt in the image forming apparatus, can move in the vertical direction with respect to the photosensitive drum in a state where the drum cartridge is mounted on the main body housing. It may be configured to be. Further, in the image forming apparatus, the belt unit is located at one end of the intermediate transfer belt in the first direction and at the other end of the intermediate transfer belt in the first direction.
  • the second frame may be configured to include a second frame located farther from the opening than the first frame in the first direction. Then, the separation lift may be configured to come into contact with the first frame and the second frame when the separation lift is located at the first position.
  • the image forming apparatus is configured to include a first roller that is rotatable about a third axis extending in the first direction and a second roller that is rotatable about a fourth axis extending in the first direction. May be good.
  • the first roller is a roller located on the inner peripheral surface of the intermediate transfer belt, and is located between the first frame and the second frame in the first direction.
  • the second roller is a roller located on the inner peripheral surface of the intermediate transfer belt, and is located between the first frame and the second frame in the first direction. The second roller is located away from the first roller in a second direction that intersects the first direction.
  • the first roller may be a drive roller for driving the intermediate transfer belt
  • the second roller may be a driven roller that rotates according to the drive of the intermediate transfer belt. ..
  • the drum cartridge may be configured to be aligned with the developing cartridge in the second direction in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. Good.
  • the image forming apparatus described above has a first roller that is rotatable about a third axis extending in the first direction and a second roller that is rotatable about a fourth axis extending in the first direction. It may be configured to include a roller.
  • the first roller is located on the inner peripheral surface of the intermediate transfer belt.
  • the second roller is located on the inner peripheral surface of the intermediate transfer belt and is located away from the first roller in the second direction intersecting the first direction.
  • the intermediate transfer belt may be configured to be rotatable about a first rotation shaft extending in the first direction with respect to the photosensitive drum in a state where the drum cartridge is attached to the main body housing.
  • the first roller may be a drive roller for driving the intermediate transfer belt
  • the second roller may be a driven roller that rotates according to the drive of the intermediate transfer belt. ..
  • the belt unit has a first frame located at one end of the intermediate transfer belt in the first direction and a second frame located at the other end of the intermediate transfer belt in the first direction. It may be configured to include a frame.
  • the first frame is located at one end of the first roller in the first direction and at one end of the second roller in the first direction.
  • the second frame is located at the other end of the first roller in the first direction and at the other end of the second roller in the first direction. Further, the second frame is located away from the opening in the first direction than the first frame. Then, when the separation lift is located at the first position, it comes into contact with one end of the first frame in the second direction and one end of the second frame in the second direction, and the second direction. It may be configured so as not to come into contact with the other end of the first frame and the other end of the second frame in the second direction.
  • the drum cartridge may be configured to be aligned with the developing cartridge in the second direction in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. Good.
  • the belt unit has a first frame located at one end of the intermediate transfer belt in the first direction and the intermediate transfer in the first direction.
  • a second frame located at the other end of the belt which is rotatable about a second frame located farther from the opening than the first frame in the first direction and a third axis extending in the first direction.
  • the first roller is a first roller located on the inner peripheral surface of the intermediate transfer belt, and the second roller is rotatable about a fourth axis extending in the first direction, and is inside the intermediate transfer belt.
  • the second roller is located on the peripheral surface, and may be configured to include a second roller located away from the first roller in the second direction intersecting the first direction.
  • the intermediate transfer belt may be configured to be parallel to the second direction and rotatable about a second rotation axis intersecting with the second frame.
  • the first frame is located at one end of the first roller in the first direction and one end of the second roller in the first direction, and the second frame is the same. It may be configured to be located at the other end of the first roller in the first direction and the other end of the second roller in the first direction. Then, when the separation lift is located at the first position, it may be configured so as to come into contact with the first frame and not to come into contact with the second frame.
  • the first roller may be a drive roller for driving the intermediate transfer belt
  • the second roller may be a driven roller that rotates according to the drive of the intermediate transfer belt. ..
  • the drum cartridge may be configured to be aligned with the developing cartridge in the second direction in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. Good.
  • the drum cartridge may have a first side surface and a second side surface located away from the first side surface in the first direction.
  • the second side surface is located farther from the opening than the first side surface when the drum cartridge is mounted on the main body housing.
  • the contact may be configured to be located on the second side surface.
  • the drum cartridge may include an IC chip, and the IC chip may have the contacts.
  • the drum cartridge since the intermediate transfer belt is movable with respect to the photosensitive drum, the drum cartridge does not move with respect to the main body housing. Therefore, it is possible to prevent the contacts of the drum cartridge from being worn.
  • FIG. 4 is a view of the belt unit, the separation lift, and the link mechanism shown in FIG. 4 as viewed from the first direction.
  • the color printer 1 includes a main body housing 2, a paper feeding unit 3, an image forming unit 4, and a paper ejection unit 5.
  • the paper feeding unit 3 supplies the paper P to the image forming unit 4.
  • the image forming unit 4 forms an image on the paper P.
  • the paper ejection unit 5 ejects the paper P.
  • the paper feed unit 3 is located at the lower part in the main body housing 2.
  • the paper feed unit 3 includes a paper feed tray 31 and a paper feed mechanism 32.
  • the paper feed tray 31 is removable from the main body housing 2.
  • the paper feed mechanism 32 conveys the paper P from the paper feed tray 31 to the image forming unit 4.
  • the image forming unit 4 includes four drum cartridges 40, four developing cartridges 50, an exposure apparatus SU, a transfer unit 60, and a fixing unit 70.
  • Each drum cartridge 40 has a photosensitive drum 41, a charger (not shown), and a drum frame F1.
  • the photosensitive drum 41 is rotatable about the first axis X1 extending in the first direction.
  • the four drum cartridges 40 are arranged in the second direction intersecting the first direction while being mounted on the main body housing 2.
  • Each developing cartridge 50 has a developing roller 51 and a developing frame F2.
  • the developing frame F2 houses the developing agent.
  • the developing roller 51 is rotatable about a second axis X2 extending in the first direction.
  • the four developing cartridges 50 are arranged in the second direction while being mounted on the main body housing 2.
  • the exposure apparatus SU is located below each drum cartridge 40.
  • the exposure apparatus SU emits laser light to each photosensitive drum 41.
  • the transfer unit 60 is located between the four photosensitive drums 41 and the paper ejection tray 21.
  • the transfer unit 60 includes a drive roller 61 as an example of the first roller, a driven roller 62 as an example of the second roller, an intermediate transfer belt 63, four primary transfer rollers 64, and a secondary transfer roller 65. , Equipped with.
  • the drive roller 61 is a roller for driving the intermediate transfer belt 63.
  • the drive roller 61 is rotatable about a third axis X3 extending in the first direction.
  • the drive roller 61 is located on the inner peripheral surface of the intermediate transfer belt 63.
  • the driven roller 62 is a roller that rotates according to the drive of the intermediate transfer belt 63.
  • the driven roller 62 is rotatable about a fourth axis X4 extending in the first direction.
  • the driven roller 62 is located on the inner peripheral surface of the intermediate transfer belt 63. Further, the driven roller 62 is located away from the driving roller 61 in the second direction.
  • the intermediate transfer belt 63 is an endless belt.
  • the intermediate transfer belt 63 is located above the drum cartridge 40 and the developing cartridge 50 in a state where the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2.
  • the primary transfer roller 64 is located inside the intermediate transfer belt 63.
  • the primary transfer roller 64 and the photosensitive drum 41 sandwich the intermediate transfer belt 63.
  • the secondary transfer roller 65 is located outside the intermediate transfer belt 63.
  • the secondary transfer roller 65 and the drive roller 61 sandwich the intermediate transfer belt 63.
  • the fixing unit 70 is located above the intermediate transfer belt 63.
  • the fixing unit 70 includes a heating roller 71 and a pressurizing roller 72.
  • the pressure roller 72 is pressed by the heating roller 71.
  • the paper ejection unit 5 is located at the upper part of the main body housing 2.
  • the paper ejection portion 5 is located above the intermediate transfer belt 63.
  • the paper ejection unit 5 includes an ejection roller 9 and a paper ejection tray 21.
  • the discharge roller 9 conveys the paper P toward the paper discharge tray 21.
  • the charger first charges the surface of the photosensitive drum 41. After that, the exposure apparatus SU exposes the surface of the photosensitive drum 41. As a result, an electrostatic latent image is formed on the photosensitive drum 41.
  • the developing roller 51 supplies the developer to the electrostatic latent image on the photosensitive drum 41. As a result, a developer image is formed on the photosensitive drum 41. Then, the developer image on the photosensitive drum 41 is transferred onto the intermediate transfer belt 63.
  • the developer image on the intermediate transfer belt 63 is transferred onto the paper P. After that, the developer image on the paper P is fixed by the fixing unit 70. Next, the paper P is discharged to the paper discharge tray 21 by the discharge roller 9.
  • the main body housing 2 has an opening 22A.
  • the opening 22A allows each drum cartridge 40 and each developing cartridge 50 to pass through when the drum cartridge 40 and the developing cartridge 50 are attached and detached.
  • the main body housing 2 has a side wall 22B located at a position facing the opening 22A.
  • the side wall 22B has a drum IC chip contact CT1 that contacts the contact 46 (see FIG. 3) of the IC chip 45 described later of the drum cartridge 40 in a state where the drum cartridge 40 is mounted on the main body housing 2.
  • the side wall 22B has a developing IC chip contact CT2 that contacts the contact 56 (see FIG. 3) of the IC chip 55 described later of the developing cartridge 50 in a state where the developing cartridge 50 is mounted on the main body housing 2.
  • the main body housing 2 has four drum guide surfaces 24, four drum guide protrusions 25, four development guide surfaces 26, and four development guide protrusions 27.
  • the drum guide surface 24 is formed at a position one step higher than the development guide surface 26.
  • the drum guide protrusion 25 is formed on the upper surface of the drum guide surface 24.
  • the development guide protrusion 27 is formed on the upper surface of the development guide surface 26.
  • the drum guide surface 24 and the drum guide protrusion 25 guide the drum cartridge 40 mounted through the opening 22A.
  • the drum guide surface 24 or the development guide surface 26 is provided with an opening (not shown) for passing the laser beam from the exposure apparatus SU.
  • the development guide surface 26 and the development guide protrusion 27 guide the development cartridge 50 mounted through the opening 22A.
  • the cover C is a member for opening and closing the opening 22A.
  • the cover C has a shaft C1.
  • the cover C is rotatable with respect to the main body housing 2 because the shaft C1 is rotatably supported by the main body housing 2.
  • the cover C is movable between an open position for opening the opening 22A (see FIG. 6C) and a position for closing the opening 22A (see FIG. 6A).
  • the photosensitive drum 41 is rotatably supported by the drum frame F1.
  • the drum cartridge 40 is removable from the main body housing 2 in the first direction.
  • Each drum cartridge 40 has the same structure.
  • the drum frame F1 of the drum cartridge 40 has a first side surface (not shown) and a second side surface 42.
  • the first side surface faces the opening 22A in the first direction in a state where the drum cartridge 40 is mounted on the main body housing 2.
  • the second side surface 42 is located away from the first side surface in the first direction.
  • the second side surface 42 is located farther from the opening 22A than the first side surface when the drum cartridge 40 is mounted on the main body housing 2.
  • the drum cartridge 40 includes an IC chip 45.
  • the IC chip 45 has a drum memory (not shown) and a contact 46.
  • the contact 46 is located on the second side surface 42.
  • the drum memory and the contact 46 can also be arranged at separate positions.
  • the drum cartridge 40 has a drum guide groove 48 in which the drum guide protrusion 25 is fitted on the bottom surface of the drum frame F1.
  • the drum cartridge 40 is aligned with the developing cartridge 50 in the second direction in a state where the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2.
  • the developing roller 51 is rotatably supported by the developing frame F2.
  • the developing cartridge 50 is removable from the main body housing 2 in the first direction.
  • Each developing cartridge 50 has the same structure.
  • the developing frame F2 of the developing cartridge 50 has a first side surface (not shown) and a second side surface 52.
  • the first side surface faces the opening 22A in the first direction in a state where the developing cartridge 50 is mounted on the main body housing 2.
  • the second side surface 52 is located away from the first side surface in the first direction.
  • the second side surface 52 is located farther from the opening 22A than the first side surface when the developing cartridge 50 is mounted on the main body housing 2.
  • the developing cartridge 50 includes an IC chip 55.
  • the IC chip 55 has a developing memory (not shown) and a contact 56.
  • the contact 56 is located on the second side surface 52.
  • the development memory and the contact 56 can be arranged at a distance from each other.
  • the development cartridge 50 has a development guide groove 58 in which the development guide protrusion 27 is fitted on the bottom surface of the development frame F2.
  • the color printer 1 includes a belt unit 100 including an intermediate transfer belt 63. Then, the belt unit 100 moves up and down in conjunction with the opening and closing of the cover C, so that the intermediate transfer belt 63 separates and contacts the photosensitive drum 41.
  • the belt unit 100 includes an intermediate transfer belt 63, a drive roller 61 as an example of the first roller, a driven roller 62 as an example of the second roller, a first frame 102, and a second frame 106.
  • the first frame 102 is located at one end 63A of the intermediate transfer belt 63 in the first direction. That is, the first frame 102 is located at one end of the drive roller 61 in the first direction and one end of the driven roller 62 in the first direction.
  • the first frame 102 supports a first bearing BR1 that rotatably supports the drive roller 61 and a second bearing BR2 that rotatably supports the driven roller 62.
  • the first frame 102 has two protrusions 103 that project outward in the first direction. Each protrusion 103 is located apart in the second direction.
  • the second frame 106 is located at the other end 63B of the intermediate transfer belt 63 in the first direction. That is, the second frame 106 is located at the other end of the drive roller 61 in the first direction and the other end of the driven roller 62 in the first direction.
  • the second frame 106 is located farther from the opening 22A than the first frame 102 in the first direction.
  • the second frame 106 supports a first bearing BR1 that rotatably supports the drive roller 61 and a second bearing BR2 that rotatably supports the driven roller 62.
  • the second frame 106 has two protrusions 107 protruding outward in the first direction.
  • the protrusions 107 are located apart in the second direction.
  • the drive roller 61 is located between the first frame 102 and the second frame 106 in the first direction.
  • the driven roller 62 is located between the first frame 102 and the second frame 106 in the first direction.
  • the belt unit 100 is supported by two separation lifts 120 of the main body housing 2.
  • the separation lifts 120 are located apart in the second direction.
  • One separation lift 120 in the second direction comes into contact with one end of the first frame 102 in the second direction and one end of the second frame 106 in the second direction.
  • one separation lift 120 in the second direction supports a protrusion 103 close to the drive roller 61 of the first frame 102 and a protrusion 107 close to the drive roller 61 of the second frame 106.
  • the other separation lift 120 in the second direction comes into contact with the other end of the first frame 102 in the second direction and the other end of the second frame 106 in the second direction.
  • each separation lift 120 in the second direction supports a protrusion 103 close to the driven roller 62 of the first frame 102 and a protrusion 107 close to the driven roller 62 of the second frame 106.
  • Each separation lift 120 includes a base portion 122 and two support portions 124.
  • the base portion 122 is a plate-shaped member that is long in the first direction.
  • the base portion 122 is located below the belt unit 100.
  • the length of the base portion 122 is longer than the distance between the first frame 102 and the second frame 106 in the first direction.
  • the base portion 122 is in contact with the lift plate 146 of the link mechanism 140, which will be described later.
  • Each of the two support portions 124 extends upward from the base portion 122.
  • Each support portion 124 has a ring portion 125 at the upper end of each support portion 124.
  • One ring portion 125 has a through hole 126 into which the protrusion 103 of the first frame 102 fits.
  • the other ring portion 125 has a through hole 126 into which the protrusion 107 of the second frame 106 fits.
  • the protrusion 103 at the other end of the first frame 102 and the protrusion 107 at the other end of the second frame 106 fit into the through holes 126 of the support portions 124, so that the belt unit 100 in the second direction The other end is supported by the separation lift 120.
  • the main body housing 2 has two link mechanisms 140 that move in conjunction with the opening and closing of the cover C.
  • One link mechanism 140 is located below one of the separation lifts 120, corresponding to one end of the first frame 102 in the second direction and one end of the second frame 106 in the second direction.
  • the other link mechanism 140 is located below the other separation lift 120, corresponding to the other end of the first frame 102 in the second direction and the other end of the second frame 106 in the second direction.
  • the belt unit 100 has a contact position where the intermediate transfer belt 63 comes into contact with the photosensitive drum 41 (see FIG. 6A) and a separation position where the intermediate transfer belt 63 is separated from the photosensitive drum 41 by the movement of the two link mechanisms 140. It is possible to move between (see FIG. 6 (c)).
  • Each link mechanism 140 includes a first arm 142, a second arm 144, and a lift plate 146.
  • the first arm 142 is integrally formed with the cover C at the lower end of the cover C.
  • the first arm 142 is a member having a substantially semicircular shape.
  • the first arm 142 is rotatable with respect to the main body housing 2 by rotating the cover C with respect to the shaft C1. When the cover C is in the closed position, the first arm 142 projects in the first direction from the cover C.
  • the second arm 144 is an elongated member.
  • the second arm 144 has one end and the other end. One end of the second arm 144 is rotatably connected to the main body housing 2.
  • the other end of the second arm 144 is rotatable with respect to the main body housing 2 about one end of the second arm 144.
  • the lift plate 146 is a plate-shaped member that is long in the first direction.
  • the lift plate 146 has one end and the other end away from one end of the lift plate 146 in the first direction.
  • One end of the lift plate 146 is connected to the first arm 142, and the other end of the lift plate 146 is connected to the other end of the second arm 144.
  • the lift plate 146 supports the separation lift 120.
  • the operation of the belt unit 100 that moves up and down in conjunction with the opening and closing of the cover C will be described.
  • the shaft C1 of the cover C and the first arm 142 are aligned in the first direction, and one end of the second arm 144 and the second arm 144 The other ends are lined up in the first direction.
  • the lift plate 146 connected to the first arm 142 and the second arm 144 is located at the lowered position.
  • the separation lift 120 supported by the lift plate 146 is located at a second position corresponding to the lowering position.
  • the belt unit 100 supported by the support portion 124 is lowered with respect to the drum cartridge 40 and the developing cartridge 50 mounted on the main body housing 2, and is positioned at a contact position where the intermediate transfer belt 63 comes into contact with the photosensitive drum 41. To do. That is, when the cover C is in the closed position, the separation lift 120 is in the second position.
  • the shaft C1 of the cover C and the first arm 142 are perpendicular to the first direction, and the second arm 144 is in the first direction. Be perpendicular to it.
  • the lift plate 146 connected to the first arm 142 and the second arm 144 is located at the raised position.
  • the separation lift 120 supported by the lift plate 146 is located at the first position corresponding to the ascending position. Therefore, the belt unit 100 supported by the support portion 124 rises with respect to the drum cartridge 40 and the developing cartridge 50, and the intermediate transfer belt 63 is located at a separated position away from the photosensitive drum 41. That is, when the cover C is in the open position, the separation lift 120 is in the first position.
  • the separation lift 120 comes into contact with the first frame 102 and the second frame 106 when the separation lift 120 is located at the first position, and the first frame 102 and the separation lift 120 are also when the separation lift 120 is located at the second position. It comes into contact with the second frame 106.
  • the intermediate transfer belt 63 can move in the vertical direction with respect to the photosensitive drum 41 in a state where the drum cartridge 40 is mounted on the main body housing 2. Then, the intermediate transfer belt 63 is separated from the photosensitive drum 41 when the separation lift 120 is located at the first position, and comes into contact with the photosensitive drum 41 when the separation lift 120 is located at the second position.
  • the cover C When the cover C is in the open position, the user attaches / detaches the drum cartridge 40 and the developing cartridge 50 through the opening 22A. At this time, since the intermediate transfer belt 63 of the belt unit 100 is in the raised position, the photosensitive drum 41 does not come into contact with the intermediate transfer belt 63 when the drum cartridge 40 is attached, and the drum cartridge 40 can be smoothly mounted on the main body housing. It can be inserted into the body 2.
  • the developing cartridge 50 is pressed by the pressing member (not shown), and the developing roller 51 comes into contact with the photosensitive drum 41.
  • the intermediate transfer belt 63 is movable with respect to the photosensitive drum 41, the drum cartridge 40 does not move with respect to the main body housing 2. Therefore, it is possible to prevent the contact 46 of the drum cartridge 40 from being worn.
  • the belt unit 100 is always supported by the separation lift 120, but the present disclosure is not limited to the above-described embodiment.
  • the main body housing 2 may have a support portion 30 that supports the belt unit 100 when the separation lift 120 is in the lowered second position.
  • the separation lift 120 may be configured to separate from the belt unit 100 when it is in the second position.
  • the ring portion 125 of the separation lift 120 needs to be changed to, for example, a U-shaped portion or a V-shaped portion so as to support the protrusion 103 or the protrusion 107 from below.
  • the main body housing 2 has one separation lift 120 and one link mechanism 140. More specifically, the separation lift 120 and the link mechanism 140 are located at the other end of the first frame 102 in the second direction and the other end of the second frame 106 in the second direction. On the other hand, one end of the first frame 102 in the second direction has a through hole 105. Similarly, one end of the second frame 106 in the second direction has a through hole (not shown).
  • the belt unit 100 rotates in the first rotation. It becomes rotatable about the shaft X5.
  • the first rotation axis X5 is parallel to the third axis X3 and is closer to the third axis X3 than the fourth axis X4 in the second direction. More specifically, in the second direction, the distance from the first rotation axis X5 to the third axis X3 is smaller than the distance from the first rotation axis X5 to the fourth axis X4.
  • the intermediate transfer belt 63 is rotatable about the first rotation shaft X5 with respect to the photosensitive drum 41 in a state where the drum cartridge 40 is mounted on the main body housing 2.
  • the separation lift 120 is located in the second position corresponding to the lowering position as shown in FIG. 7.
  • the belt unit 100 is in a position lowered with respect to the drum cartridge 40 and the developing cartridge 50 mounted on the main body housing 2, and the intermediate transfer belt 63 is in contact with the photosensitive drum 41.
  • the separation lift 120 is located in the first position corresponding to the ascending position.
  • the belt unit 100 rotates about the first rotation shaft X5, and the other end of the first frame 102 in the second direction and the other end of the second frame 106 in the second direction are raised by the separation lift 120.
  • the other end of the belt unit 100 in the second direction is in a raised position with respect to the drum cartridge 40 and the developing cartridge 50 mounted on the main body housing 2, and the intermediate transfer belt 63 is separated from the photosensitive drum 41. ..
  • the drum cartridge 40 when the cover C is in the open position, the other end of the intermediate transfer belt 63 of the belt unit 100 in the second direction is in the raised position, so that when the drum cartridge 40 is mounted, the other end is in the raised position.
  • the drum cartridge 40 can be smoothly inserted into the main body housing 2 without the photosensitive drum 41 coming into contact with the intermediate transfer belt 63. Further, since the intermediate transfer belt 63 is movable with respect to the photosensitive drum 41, the drum cartridge 40 does not move with respect to the main body housing 2. Therefore, it is possible to prevent the contact 46 of the drum cartridge 40 from being worn.
  • the position of the first rotation axis X5 of the belt unit 100 may be changed to the other end of the first frame 102 in the second direction and the other end of the second frame 106 in the second direction.
  • one end of the first frame 102 in the second direction and one end side of the second frame 106 in the second direction are configured to be raised or lowered by the separation lift 120.
  • the driven roller 62 corresponds to the first roller
  • the driving roller 61 corresponds to the second roller.
  • the first frame 102 is raised or raised around the second rotation axis X6 passing through the second frame 106 by two separation lifts 220 (only one of which is shown in the drawing) interlocking with the opening and closing of the cover C. Descend. More specifically, the second frame 106 has a protrusion 107 located at one end of the second frame 106 in the second direction and a protrusion 107 located at the other end of the second frame 106 in the second direction. .. Each protrusion 107 has a through hole 108.
  • the belt unit 100 can rotate about the second rotation shaft X6. That is, the intermediate transfer belt 63 is parallel to the second direction intersecting the first direction and is rotatable about the second rotation axis X6 intersecting the second frame 106.
  • the cover C has two protrusions C3 at positions separated from the rotation center CX of the cover C.
  • One protrusion C3 is located at one end of the cover C in the first direction.
  • the other protrusion C3 is located at the other end of the cover C in the first direction.
  • the two separation lifts 220 are located in the first direction between one end of the intermediate transfer belt 63 and the opening 22A in the first direction.
  • One separation lift supports a protrusion 103 at one end of the first frame 102 in the second direction.
  • the other separation lift 220 supports the protrusion 103 at the other end of the first frame 102 in the second direction.
  • Each separation lift 220 has an L shape.
  • Each separation lift 220 includes a main body portion 222 extending linearly, a support portion 223 (see FIG. 9), and a leg portion 224.
  • the support portion 223 is located at the upper end portion of the main body portion 222.
  • the support portion 223 has a U-shaped groove for supporting the protrusion 103 from below.
  • the leg portion 224 extends from the lower end portion of the main body portion 222 toward the cover C.
  • the leg portion 224 has an elongated hole 225 into which the protrusion C3 of the cover C fits.
  • the main body housing 2 includes a pair of guide portions 28 that guide the main body portions 222 of each separation lift 220. When the separation lift 220 is located in the first position, the separation lift 220 contacts the first frame 102 and not the second frame 106.
  • the separation lift 220 is in the second position corresponding to the lowering position.
  • the belt unit 100 whose one end is supported by the support portion 223 is the drum cartridge 40 mounted on the main body housing 2 and the belt unit 100. It is in a position lowered with respect to the developing cartridge 50, and the intermediate transfer belt 63 is in contact with the photosensitive drum 41.
  • the protrusion C3 rotates about the rotation center CX of the cover C. Then, the protrusion C3 presses the edge of the elongated hole 225 of the leg portion 224 upward. As a result, the main body portion 222 of the separation lift 220 is guided by the guide portion 28 and rises. At this time, the separation lift 220 is in a position slightly raised from the second position.
  • the belt unit 100 rotates about the second rotation shaft X6, and the first frame 102 starts to rise by the separation lift 120.
  • the protrusion C3 is located at the other end of the elongated hole 225 of the leg portion 224.
  • the main body portion 222 of the separation lift 220 is further raised by being guided by the guide portion 28, and the separation lift 220 is in the first position corresponding to the rising position.
  • the belt unit 100 is in a raised position with respect to the drum cartridge 40 and the developing cartridge 50 mounted on the main body housing 2. Yes, the intermediate transfer belt 63 is separated from the photosensitive drum 41.
  • the drum cartridge 40 when the cover C is in the open position, one end of the intermediate transfer belt 63 of the belt unit 100 in the first direction is in a raised position with respect to the drum cartridge 40 mounted on the main body housing 2. Therefore, when the drum cartridge 40 is mounted, the drum cartridge 40 can be smoothly inserted into the main body housing 2 without the photosensitive drum 41 coming into contact with the intermediate transfer belt 63. Further, since the intermediate transfer belt 63 is movable with respect to the photosensitive drum 41, the drum cartridge 40 does not move with respect to the main body housing 2. Therefore, it is possible to prevent the contact 46 of the drum cartridge 40 from being worn.
  • the present disclosure is applied to the color printer 1, but the present disclosure is not limited to this, and the present disclosure is applied to other image forming devices such as monochrome printers, copiers, and multifunction devices. May be good.
  • the contact 46 of the IC chip 45 is the contact of the drum cartridge 40, but the present disclosure is not limited to such a configuration.
  • a contact electrically connected to the charging roller or another contact may be a contact of the drum cartridge 40.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Color Electrophotography (AREA)

Abstract

Provided is an image forming apparatus that can suppress wear of a contact of a drum cartridge. This image forming apparatus comprises a main body case, a cover C, a drum cartridge, a development cartridge, a belt unit 100 that includes an intermediate transfer belt 63, and a separation lift 120. The separation lift 120 is located at a first position when the cover C is located at an open position, and is located at a second position when the cover C is located at a closed position. The intermediate transfer belt 63 is separated from the photosensitive drum 41 when the separation lift 120 is located at the first position, and comes into contact with the photosensitive drum 41 when the separation lift 120 is located at the second position.

Description

画像形成装置Image forming device
　本開示は、本体筐体に着脱可能なドラムカートリッジおよび現像カートリッジを備える画像形成装置に関する。 The present disclosure relates to an image forming apparatus including a drum cartridge and a developing cartridge that can be attached to and detached from the main body housing.
　従来、本体筐体にドラムカートリッジおよび現像カートリッジを個別に着脱可能な画像形成装置が知られている（特許文献１参照）。この技術では、ドラムカートリッジおよび現像カートリッジは、感光ドラムの軸方向に着脱可能となっている。そして、ドラムカートリッジおよび現像カートリッジを本体筐体に装着後、カバーを閉じると、ドラムカートリッジおよび現像カートリッジが中間転写ベルトに対して移動する。 Conventionally, an image forming apparatus has been known in which a drum cartridge and a developing cartridge can be individually attached to and detached from the main body housing (see Patent Document 1). In this technique, the drum cartridge and the developing cartridge are removable in the axial direction of the photosensitive drum. Then, when the cover is closed after the drum cartridge and the developing cartridge are attached to the main body housing, the drum cartridge and the developing cartridge move with respect to the intermediate transfer belt.
特開２０１８－７７４５９号公報Japanese Unexamined Patent Publication No. 2018-77459
　一般的にドラムカートリッジは、ＩＣチップや帯電ローラなどに電気的に接続される接点を有している。また、本体筐体は、ドラムカートリッジが本体筐体に装着された状態において、ドラムカートリッジの接点が接触する本体接点を備えている。 Generally, a drum cartridge has a contact that is electrically connected to an IC chip, a charging roller, or the like. Further, the main body housing includes main body contacts that the contacts of the drum cartridge come into contact with when the drum cartridge is mounted on the main body housing.
　しかしながら、ドラムカートリッジを中間転写ベルトに対して移動させる構成とした場合、ドラムカートリッジが中間転写ベルトに対して移動したときに、ドラムカートリッジの接点が本体筐体の本体接点と摺接することになるため、ドラムカートリッジの接点が摩耗してしまう可能性がある。 However, if the drum cartridge is configured to be moved with respect to the intermediate transfer belt, the contacts of the drum cartridge will be in sliding contact with the main body contacts of the main body housing when the drum cartridge is moved with respect to the intermediate transfer belt. , The contacts of the drum cartridge may wear out.
　本開示は、ドラムカートリッジの接点が摩耗することを抑制できる画像形成装置を提供することを目的とする。 An object of the present disclosure is to provide an image forming apparatus capable of suppressing wear of the contacts of a drum cartridge.
　前記課題を解決するため、本開示に係る画像形成装置は、開口を有する本体筐体と、前記開口を開ける開位置と前記開口を閉じる閉位置との間を移動可能なカバーと、第１方向に延びる第１軸について回転可能な感光ドラムと接点とを有するドラムカートリッジと、前記第１方向に延びる第２軸について回転可能な現像ローラを有する現像カートリッジと、前記ドラムカートリッジおよび前記現像カートリッジが前記本体筐体に装着された状態において、前記ドラムカートリッジおよび前記現像カートリッジの上方に位置する中間転写ベルトを備えるベルトユニットと、離間リフトと、を備える
　ドラムカートリッジは、前記第１方向に前記本体筐体に着脱可能である。
　現像カートリッジは、前記第１方向に前記本体筐体に着脱可能である。
　中間転写ベルトは、前記ドラムカートリッジが前記本体筐体に装着された状態で、前記感光ドラムに対して移動可能である。
　離間リフトは、前記カバーが前記開位置に位置するときに第１位置に位置し、前記カバーが前記閉位置に位置するときに第２位置に位置する。
　前記中間転写ベルトは、前記離間リフトが第１位置に位置するときに、前記感光ドラムから離間し、前記離間リフトが第２位置に位置するときに、前記感光ドラムと接触することを特徴とする。 In order to solve the above-mentioned problems, the image forming apparatus according to the present disclosure includes a main body housing having an opening, a cover that can move between an open position for opening the opening and a closed position for closing the opening, and a first direction. A drum cartridge having a photosensitizing drum and a contact that can be rotated about a first axis extending from the first axis, a developing cartridge having a developing roller that can rotate about the second axis extending in the first direction, and the drum cartridge and the developing cartridge The drum cartridge including the drum cartridge, the belt unit including the intermediate transfer belt located above the developing cartridge, and the separation lift when mounted on the main body housing is the main body housing in the first direction. It is removable.
The developing cartridge can be attached to and detached from the main body housing in the first direction.
The intermediate transfer belt can be moved with respect to the photosensitive drum with the drum cartridge attached to the main body housing.
The separation lift is located in the first position when the cover is in the open position and in the second position when the cover is in the closed position.
The intermediate transfer belt is characterized in that it separates from the photosensitive drum when the separation lift is located at the first position and comes into contact with the photosensitive drum when the separation lift is located at the second position. ..
　この構成によれば、中間転写ベルトが感光ドラムに対して移動可能であるので、ドラムカートリッジは、本体筐体に対して動かない。そのため、ドラムカートリッジの接点が摩耗することを抑制できる。 According to this configuration, the intermediate transfer belt can be moved with respect to the photosensitive drum, so that the drum cartridge does not move with respect to the main body housing. Therefore, it is possible to prevent the contacts of the drum cartridge from being worn.
　具体的な構成の一態様として、前記した画像形成装置において、前記中間転写ベルトは、前記ドラムカートリッジが前記本体筐体に装着された状態において、前記感光ドラムに対して、上下方向に移動可能となるように構成してもよい。
　また、前記した画像形成装置において、前記ベルトユニットは、前記第１方向における前記中間転写ベルトの一端部に位置する第１フレームと、前記第１方向における前記中間転写ベルトの他端部に位置する第２フレームであって、前記第１方向において前記第１フレームよりも前記開口から離れて位置する第２フレームと、を備える構成としてもよい。
　そして、前記離間リフトは、前記離間リフトが前記第１位置に位置する場合、前記第１フレームおよび前記第２フレームと接触するように構成してもよい。 As one embodiment of the specific configuration, in the image forming apparatus, the intermediate transfer belt can move in the vertical direction with respect to the photosensitive drum in a state where the drum cartridge is mounted on the main body housing. It may be configured to be.
Further, in the image forming apparatus, the belt unit is located at one end of the intermediate transfer belt in the first direction and at the other end of the intermediate transfer belt in the first direction. The second frame may be configured to include a second frame located farther from the opening than the first frame in the first direction.
Then, the separation lift may be configured to come into contact with the first frame and the second frame when the separation lift is located at the first position.
　前記した画像形成装置は、前記第１方向に延びる第３軸について回転可能な第１ローラと、前記第１方向に延びる第４軸について回転可能な第２ローラと、を備えるように構成してもよい。
　第１ローラは、前記中間転写ベルトの内周面に位置するローラであり、前記第１方向において前記第１フレームと前記第２フレームの間に位置する。
　第２ローラは、前記中間転写ベルトの内周面に位置するローラであり、前記第１方向において前記第１フレームと前記第２フレームの間に位置する。第２ローラは、前記第１方向と交差する第２方向において前記第１ローラと離れて位置する。 The image forming apparatus is configured to include a first roller that is rotatable about a third axis extending in the first direction and a second roller that is rotatable about a fourth axis extending in the first direction. May be good.
The first roller is a roller located on the inner peripheral surface of the intermediate transfer belt, and is located between the first frame and the second frame in the first direction.
The second roller is a roller located on the inner peripheral surface of the intermediate transfer belt, and is located between the first frame and the second frame in the first direction. The second roller is located away from the first roller in a second direction that intersects the first direction.
　前記した画像形成装置において、前記第１ローラは、前記中間転写ベルトを駆動するための駆動ローラであり、前記第２ローラは、前記中間転写ベルトの駆動に従い回転する従動ローラである構成としてもよい。 In the image forming apparatus described above, the first roller may be a drive roller for driving the intermediate transfer belt, and the second roller may be a driven roller that rotates according to the drive of the intermediate transfer belt. ..
　また、前記した画像形成装置において、前記ドラムカートリッジは、前記ドラムカートリッジおよび前記現像カートリッジが前記本体筐体に装着された状態において、前記第２方向において、前記現像カートリッジと並ぶように構成してもよい。 Further, in the image forming apparatus, the drum cartridge may be configured to be aligned with the developing cartridge in the second direction in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. Good.
　具体的な構成の別の態様として、前記した画像形成装置は、前記第１方向に延びる第３軸について回転可能な第１ローラと、前記第１方向に延びる第４軸について回転可能な第２ローラと、を備えるように構成してもよい。
　第１ローラは、前記中間転写ベルトの内周面に位置する。
　第２ローラは、前記中間転写ベルトの内周面に位置し、前記第１方向と交差する第２方向において前記第１ローラと離れて位置する。
　前記中間転写ベルトは、前記ドラムカートリッジが前記本体筐体に装着された状態において、前記感光ドラムに対して、前記第１方向に延びる第１回転軸について回動可能である構成としてもよい。 As another aspect of the specific configuration, the image forming apparatus described above has a first roller that is rotatable about a third axis extending in the first direction and a second roller that is rotatable about a fourth axis extending in the first direction. It may be configured to include a roller.
The first roller is located on the inner peripheral surface of the intermediate transfer belt.
The second roller is located on the inner peripheral surface of the intermediate transfer belt and is located away from the first roller in the second direction intersecting the first direction.
The intermediate transfer belt may be configured to be rotatable about a first rotation shaft extending in the first direction with respect to the photosensitive drum in a state where the drum cartridge is attached to the main body housing.
　前記した画像形成装置において、前記第１ローラは、前記中間転写ベルトを駆動するための駆動ローラであり、前記第２ローラは、前記中間転写ベルトの駆動に従い回転する従動ローラである構成としてもよい。 In the image forming apparatus described above, the first roller may be a drive roller for driving the intermediate transfer belt, and the second roller may be a driven roller that rotates according to the drive of the intermediate transfer belt. ..
　前記した画像形成装置において、前記ベルトユニットは、前記第１方向における前記中間転写ベルトの一端部に位置する第１フレームと、前記第１方向における前記中間転写ベルトの他端部に位置する第２フレームと、を備えるように構成してもよい。
　第１フレームは、前記第１方向における前記第１ローラの一端部と、前記第１方向における前記第２ローラの一端部に位置する。
　第２フレームは、前記第１方向における前記第１ローラの他端部と、前記第１方向における前記第２ローラの他端部に位置する。また、第２フレームは、前記第１方向において前記第１フレームより前記開口から離れて位置する。
　そして、前記離間リフトは、前記第１位置に位置する場合に、前記第２方向における前記第１フレームの一端部および前記第２方向における前記第２フレームの一端部と接触し、前記第２方向における前記第１フレームの他端部および前記第２方向における前記第２フレームの他端部と接触しないように構成してもよい。 In the image forming apparatus described above, the belt unit has a first frame located at one end of the intermediate transfer belt in the first direction and a second frame located at the other end of the intermediate transfer belt in the first direction. It may be configured to include a frame.
The first frame is located at one end of the first roller in the first direction and at one end of the second roller in the first direction.
The second frame is located at the other end of the first roller in the first direction and at the other end of the second roller in the first direction. Further, the second frame is located away from the opening in the first direction than the first frame.
Then, when the separation lift is located at the first position, it comes into contact with one end of the first frame in the second direction and one end of the second frame in the second direction, and the second direction. It may be configured so as not to come into contact with the other end of the first frame and the other end of the second frame in the second direction.
　また、前記した画像形成装置において、前記ドラムカートリッジは、前記ドラムカートリッジおよび前記現像カートリッジが前記本体筐体に装着された状態において、前記第２方向において、前記現像カートリッジと並ぶように構成してもよい。 Further, in the image forming apparatus, the drum cartridge may be configured to be aligned with the developing cartridge in the second direction in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. Good.
　具体的な構成の他の態様として、前記した画像形成装置において、前記ベルトユニットは、前記第１方向における前記中間転写ベルトの一端部に位置する第１フレームと、前記第１方向における前記中間転写ベルトの他端部に位置する第２フレームであって、前記第１方向において前記第１フレームよりも前記開口から離れて位置する第２フレームと、前記第１方向に延びる第３軸について回転可能な第１ローラであって、前記中間転写ベルトの内周面に位置する第１ローラと、前記第１方向に延びる第４軸について回転可能な第２ローラであって、前記中間転写ベルトの内周面に位置する第２ローラであり、前記第１方向と交差する第２方向において前記第１ローラと離れて位置する第２ローラと、を備えるように構成してもよい。
　そして、前記中間転写ベルトは、前記第２方向に平行で、前記第２フレームと交差する第２回転軸について回動可能である構成としてもよい。 As another embodiment of the specific configuration, in the image forming apparatus, the belt unit has a first frame located at one end of the intermediate transfer belt in the first direction and the intermediate transfer in the first direction. A second frame located at the other end of the belt, which is rotatable about a second frame located farther from the opening than the first frame in the first direction and a third axis extending in the first direction. The first roller is a first roller located on the inner peripheral surface of the intermediate transfer belt, and the second roller is rotatable about a fourth axis extending in the first direction, and is inside the intermediate transfer belt. The second roller is located on the peripheral surface, and may be configured to include a second roller located away from the first roller in the second direction intersecting the first direction.
Then, the intermediate transfer belt may be configured to be parallel to the second direction and rotatable about a second rotation axis intersecting with the second frame.
　前記した画像形成装置において、前記第１フレームは、前記第１方向における前記第１ローラの一端部と、前記第１方向における前記第２ローラの一端部に位置し、前記第２フレームは、前記第１方向における前記第１ローラの他端部と、前記第１方向における前記第２ローラの他端部に位置するように構成してもよい。
　そして、前記離間リフトは、前記第１位置に位置する場合に、前記第１フレームと接触し、前記第２フレームと接触しないように構成してもよい。 In the image forming apparatus described above, the first frame is located at one end of the first roller in the first direction and one end of the second roller in the first direction, and the second frame is the same. It may be configured to be located at the other end of the first roller in the first direction and the other end of the second roller in the first direction.
Then, when the separation lift is located at the first position, it may be configured so as to come into contact with the first frame and not to come into contact with the second frame.
　前記した画像形成装置において、前記第１ローラは、前記中間転写ベルトを駆動するための駆動ローラであり、前記第２ローラは、前記中間転写ベルトの駆動に従い回転する従動ローラである構成としてもよい。 In the image forming apparatus described above, the first roller may be a drive roller for driving the intermediate transfer belt, and the second roller may be a driven roller that rotates according to the drive of the intermediate transfer belt. ..
　また、前記した画像形成装置において、前記ドラムカートリッジは、前記ドラムカートリッジおよび前記現像カートリッジが前記本体筐体に装着された状態において、前記第２方向において、前記現像カートリッジと並ぶように構成してもよい。 Further, in the image forming apparatus, the drum cartridge may be configured to be aligned with the developing cartridge in the second direction in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. Good.
　さらに、前記した画像形成装置において、前記ドラムカートリッジは、第１側面と、前記第１方向において前記第１側面と離れて位置する第２側面と、を有する構成としてもよい。
　第２側面は、前記ドラムカートリッジが前記本体筐体に装着された状態において、前記第１側面よりも前記開口から離れて位置する。
　そして、前記接点は、前記第２側面に位置する構成としてもよい。 Further, in the image forming apparatus described above, the drum cartridge may have a first side surface and a second side surface located away from the first side surface in the first direction.
The second side surface is located farther from the opening than the first side surface when the drum cartridge is mounted on the main body housing.
The contact may be configured to be located on the second side surface.
　前記した画像形成装置において、前記ドラムカートリッジはＩＣチップを備え、前記ＩＣチップが前記接点を有する構成としてもよい。 In the image forming apparatus described above, the drum cartridge may include an IC chip, and the IC chip may have the contacts.
　本開示によれば、中間転写ベルトが感光ドラムに対して移動可能であるので、ドラムカートリッジは、本体筐体に対して動かない。そのため、ドラムカートリッジの接点が摩耗することを抑制できる。 According to the present disclosure, since the intermediate transfer belt is movable with respect to the photosensitive drum, the drum cartridge does not move with respect to the main body housing. Therefore, it is possible to prevent the contacts of the drum cartridge from being worn.
本開示の一実施形態に係るカラープリンタの概略構成を示す断面図である。It is sectional drawing which shows the schematic structure of the color printer which concerns on one Embodiment of this disclosure. ドラムカートリッジと現像カートリッジを取り外した状態の本体筐体を示す説明図である。It is explanatory drawing which shows the main body housing in the state which the drum cartridge and the development cartridge are removed. ドラムカートリッジおよび現像カートリッジの端部を示す説明図である。It is explanatory drawing which shows the end part of the drum cartridge and the developing cartridge. 第１実施形態の説明図であり、ベルトユニットと、離間リフトと、リンク機構とを第２方向から見た図である。It is explanatory drawing of 1st Embodiment, and is the figure which looked at the belt unit, the separation lift, and the link mechanism from the 2nd direction. 図４に示すベルトユニットと、離間リフトと、リンク機構とを第１方向から見た図である。FIG. 4 is a view of the belt unit, the separation lift, and the link mechanism shown in FIG. 4 as viewed from the first direction. カバーの開閉に連動して上下動するベルトユニットの動作を説明する説明図であり、カバーが閉位置にある状態を示す図（ａ）と、カバーが閉位置から開位置に向けて移動する状態を示す図（ｂ）と、カバーが開位置に位置する状態を示す図（ｃ）である。It is explanatory drawing explaining the operation of the belt unit which moves up and down in conjunction with opening and closing of a cover, the figure (a) which shows the state which the cover is in a closed position, and the state which the cover moves from a closed position to an open position. It is a figure (b) which shows the state, and the figure (c) which shows the state which a cover is located in an open position. 第２実施形態の説明図であり、カバーが閉位置に位置するときのベルトユニットと、離間リフトと、リンク機構とを第１方向から見た図である。It is explanatory drawing of 2nd Embodiment, and is the figure which looked at the belt unit, the separation lift, and the link mechanism when the cover is in a closed position from the first direction. 第２実施形態の説明図であり、カバーが開位置に位置するときのベルトユニットと、離間リフトと、リンク機構とを第１方向から見た図である。It is explanatory drawing of 2nd Embodiment, and is the figure which looked at the belt unit, the separation lift, and the link mechanism when the cover is in an open position from the first direction. 第３実施形態の説明図であり、カバーが閉位置に位置するときのベルトユニットと、カバーと、離間リフトとを示す図（ａ）と、カバーが開位置に位置するときのベルトユニットと、カバーと、離間リフトとを示す図（ｂ）である。It is explanatory drawing of the 3rd Embodiment, the figure (a) which shows the belt unit when the cover is in a closed position, the cover, and the separation lift, and the belt unit when a cover is in an open position. It is a figure (b) which shows the cover and the separation lift. 第３実施形態の説明図であり、カバーが閉位置に位置するときの離間リフトの位置を示す図（ａ）と、カバーが閉位置から開位置に向けて移動するときの離間リフトの位置を示す図（ｂ）と、カバーが開位置に位置するときの離間リフトの位置を示す図（ｃ）である。It is explanatory drawing of 3rd Embodiment, the figure (a) which shows the position of the separation lift when a cover is in a closed position, and the position of a separation lift when a cover moves from a closed position to an open position. It is a figure (b) which shows and the figure (c) which shows the position of the separation lift when a cover is in an open position.
　次に、本開示の一実施形態について、適宜図面を参照しながら詳細に説明する。なお、以下の説明においては、まず、画像形成装置の一例としてのカラープリンタ１の全体構成を説明する。 Next, an embodiment of the present disclosure will be described in detail with reference to the drawings as appropriate. In the following description, first, the overall configuration of the color printer 1 as an example of the image forming apparatus will be described.
　図１に示すように、カラープリンタ１は、本体筐体２と、給紙部３と、画像形成部４と、排紙部５と、を備える。給紙部３は、画像形成部４に用紙Ｐを供給する。画像形成部４は、用紙Ｐに画像を形成する。排紙部５は、用紙Ｐを排出する。 As shown in FIG. 1, the color printer 1 includes a main body housing 2, a paper feeding unit 3, an image forming unit 4, and a paper ejection unit 5. The paper feeding unit 3 supplies the paper P to the image forming unit 4. The image forming unit 4 forms an image on the paper P. The paper ejection unit 5 ejects the paper P.
　給紙部３は、本体筐体２内の下部に位置する。給紙部３は、給紙トレイ３１と、給紙機構３２と、を備える。給紙トレイ３１は、本体筐体２に着脱可能である。給紙機構３２は、用紙Ｐを給紙トレイ３１から画像形成部４に搬送する。 The paper feed unit 3 is located at the lower part in the main body housing 2. The paper feed unit 3 includes a paper feed tray 31 and a paper feed mechanism 32. The paper feed tray 31 is removable from the main body housing 2. The paper feed mechanism 32 conveys the paper P from the paper feed tray 31 to the image forming unit 4.
　画像形成部４は、４つのドラムカートリッジ４０と、４つの現像カートリッジ５０と、露光装置ＳＵと、転写ユニット６０と、定着ユニット７０と、を備える。 The image forming unit 4 includes four drum cartridges 40, four developing cartridges 50, an exposure apparatus SU, a transfer unit 60, and a fixing unit 70.
　各ドラムカートリッジ４０は、感光ドラム４１と、図示せぬ帯電器と、ドラムフレームＦ１を有する。感光ドラム４１は、第１方向に延びる第１軸Ｘ１について回転可能である。４つのドラムカートリッジ４０は、本体筐体２に装着された状態で、第１方向と交差する第２方向に並ぶ。 Each drum cartridge 40 has a photosensitive drum 41, a charger (not shown), and a drum frame F1. The photosensitive drum 41 is rotatable about the first axis X1 extending in the first direction. The four drum cartridges 40 are arranged in the second direction intersecting the first direction while being mounted on the main body housing 2.
　各現像カートリッジ５０は、現像ローラ５１と、現像フレームＦ２と、を有する。現像フレームＦ２は、現像剤を収容する。現像ローラ５１は、第１方向に延びる第２軸Ｘ２について回転可能である。４つの現像カートリッジ５０は、本体筐体２に装着された状態で、第２方向に並ぶ。 Each developing cartridge 50 has a developing roller 51 and a developing frame F2. The developing frame F2 houses the developing agent. The developing roller 51 is rotatable about a second axis X2 extending in the first direction. The four developing cartridges 50 are arranged in the second direction while being mounted on the main body housing 2.
　露光装置ＳＵは、各ドラムカートリッジ４０の下方に位置する。露光装置ＳＵは、レーザ光を各感光ドラム４１に出射する。 The exposure apparatus SU is located below each drum cartridge 40. The exposure apparatus SU emits laser light to each photosensitive drum 41.
　転写ユニット６０は、４つの感光ドラム４１と排紙トレイ２１との間に位置する。転写ユニット６０は、第１ローラの一例としての駆動ローラ６１と、第２ローラの一例としての従動ローラ６２と、中間転写ベルト６３と、４つの１次転写ローラ６４と、２次転写ローラ６５と、を備える。
　駆動ローラ６１は、中間転写ベルト６３を駆動するためのローラである。駆動ローラ６１は、第１方向に延びる第３軸Ｘ３について回転可能である。駆動ローラ６１は、中間転写ベルト６３の内周面に位置する。
　従動ローラ６２は、中間転写ベルト６３の駆動に従い回転するローラである。従動ローラ６２は、第１方向に延びる第４軸Ｘ４について回転可能である。従動ローラ６２は、中間転写ベルト６３の内周面に位置する。また、従動ローラ６２は、第２方向において駆動ローラ６１と離れて位置する。 The transfer unit 60 is located between the four photosensitive drums 41 and the paper ejection tray 21. The transfer unit 60 includes a drive roller 61 as an example of the first roller, a driven roller 62 as an example of the second roller, an intermediate transfer belt 63, four primary transfer rollers 64, and a secondary transfer roller 65. , Equipped with.
The drive roller 61 is a roller for driving the intermediate transfer belt 63. The drive roller 61 is rotatable about a third axis X3 extending in the first direction. The drive roller 61 is located on the inner peripheral surface of the intermediate transfer belt 63.
The driven roller 62 is a roller that rotates according to the drive of the intermediate transfer belt 63. The driven roller 62 is rotatable about a fourth axis X4 extending in the first direction. The driven roller 62 is located on the inner peripheral surface of the intermediate transfer belt 63. Further, the driven roller 62 is located away from the driving roller 61 in the second direction.
　中間転写ベルト６３は、無端状のベルトである。中間転写ベルト６３は、ドラムカートリッジ４０および現像カートリッジ５０が本体筐体２に装着された状態において、ドラムカートリッジ４０および現像カートリッジ５０の上方に位置する。 The intermediate transfer belt 63 is an endless belt. The intermediate transfer belt 63 is located above the drum cartridge 40 and the developing cartridge 50 in a state where the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2.
　１次転写ローラ６４は、中間転写ベルト６３の内側に位置する。１次転写ローラ６４と感光ドラム４１は、中間転写ベルト６３を挟む。 The primary transfer roller 64 is located inside the intermediate transfer belt 63. The primary transfer roller 64 and the photosensitive drum 41 sandwich the intermediate transfer belt 63.
　２次転写ローラ６５は、中間転写ベルト６３の外側に位置する。２次転写ローラ６５と駆動ローラ６１は、中間転写ベルト６３を挟む。 The secondary transfer roller 65 is located outside the intermediate transfer belt 63. The secondary transfer roller 65 and the drive roller 61 sandwich the intermediate transfer belt 63.
　定着ユニット７０は、中間転写ベルト６３の上方に位置する。定着ユニット７０は、加熱ローラ７１と、加圧ローラ７２と、を備える。加圧ローラ７２は、加熱ローラ７１に押圧される。 The fixing unit 70 is located above the intermediate transfer belt 63. The fixing unit 70 includes a heating roller 71 and a pressurizing roller 72. The pressure roller 72 is pressed by the heating roller 71.
　排紙部５は、本体筐体２の上部に位置する。排紙部５は、中間転写ベルト６３の上方に位置する。排紙部５は、排出ローラ９と、排紙トレイ２１と、を備える。排出ローラ９は、用紙Ｐを排紙トレイ２１に向けて搬送する。 The paper ejection unit 5 is located at the upper part of the main body housing 2. The paper ejection portion 5 is located above the intermediate transfer belt 63. The paper ejection unit 5 includes an ejection roller 9 and a paper ejection tray 21. The discharge roller 9 conveys the paper P toward the paper discharge tray 21.
　カラープリンタ１では、まず帯電器が、感光ドラム４１の表面を帯電させる。その後、露光装置ＳＵが、感光ドラム４１の表面を露光する。これにより、感光ドラム４１上に静電潜像が形成される。 In the color printer 1, the charger first charges the surface of the photosensitive drum 41. After that, the exposure apparatus SU exposes the surface of the photosensitive drum 41. As a result, an electrostatic latent image is formed on the photosensitive drum 41.
　次いで、現像ローラ５１が、感光ドラム４１上の静電潜像に現像剤を供給する。これにより、感光ドラム４１上に現像剤像が形成される。そして、感光ドラム４１上の現像剤像は、中間転写ベルト６３上に転写される。 Next, the developing roller 51 supplies the developer to the electrostatic latent image on the photosensitive drum 41. As a result, a developer image is formed on the photosensitive drum 41. Then, the developer image on the photosensitive drum 41 is transferred onto the intermediate transfer belt 63.
　用紙Ｐが中間転写ベルト６３と２次転写ローラ６５の間を通過するときに、中間転写ベルト６３上の現像剤像は、用紙Ｐ上に転写される。その後、用紙Ｐ上の現像剤像は、定着ユニット７０で定着される。次いで、用紙Ｐは、排出ローラ９によって排紙トレイ２１に排出される。 When the paper P passes between the intermediate transfer belt 63 and the secondary transfer roller 65, the developer image on the intermediate transfer belt 63 is transferred onto the paper P. After that, the developer image on the paper P is fixed by the fixing unit 70. Next, the paper P is discharged to the paper discharge tray 21 by the discharge roller 9.
　図２に示すように、本体筐体２は、開口２２Ａを有する。
　開口２２Ａは、ドラムカートリッジ４０および現像カートリッジ５０を着脱する際に、各ドラムカートリッジ４０および各現像カートリッジ５０が通過することを許容する。
　本体筐体２は、開口２２Ａと向かい合う位置に位置する側壁２２Ｂを有する。側壁２２Ｂは、ドラムカートリッジ４０が本体筐体２に装着された状態において、ドラムカートリッジ４０の後述するＩＣチップ４５の接点４６（図３参照）と接触するドラムＩＣチップ接点ＣＴ１を有する。また、側壁２２Ｂは、現像カートリッジ５０が本体筐体２に装着された状態において、現像カートリッジ５０の後述するＩＣチップ５５の接点５６（図３参照）と接触する現像ＩＣチップ接点ＣＴ２を有する。 As shown in FIG. 2, the main body housing 2 has an opening 22A.
The opening 22A allows each drum cartridge 40 and each developing cartridge 50 to pass through when the drum cartridge 40 and the developing cartridge 50 are attached and detached.
The main body housing 2 has a side wall 22B located at a position facing the opening 22A. The side wall 22B has a drum IC chip contact CT1 that contacts the contact 46 (see FIG. 3) of the IC chip 45 described later of the drum cartridge 40 in a state where the drum cartridge 40 is mounted on the main body housing 2. Further, the side wall 22B has a developing IC chip contact CT2 that contacts the contact 56 (see FIG. 3) of the IC chip 55 described later of the developing cartridge 50 in a state where the developing cartridge 50 is mounted on the main body housing 2.
　本体筐体２は、４つのドラムガイド面２４と、４つのドラムガイド突起２５と、４つの現像ガイド面２６と、４つの現像ガイド突起２７とを有する。ドラムガイド面２４は、現像ガイド面２６よりも一段高い位置に形成されている。ドラムガイド突起２５は、ドラムガイド面２４の上面に形成されている。現像ガイド突起２７は、現像ガイド面２６の上面に形成されている。
　ドラムガイド面２４およびドラムガイド突起２５は、開口２２Ａを通して装着されるドラムカートリッジ４０をガイドするものである。ドラムガイド面２４または現像ガイド面２６には、露光装置ＳＵからのレーザ光が通過するための開口（図示せず）が設けられている。
　現像ガイド面２６および現像ガイド突起２７は、開口２２Ａを通して装着される現像カートリッジ５０をガイドするものである。 The main body housing 2 has four drum guide surfaces 24, four drum guide protrusions 25, four development guide surfaces 26, and four development guide protrusions 27. The drum guide surface 24 is formed at a position one step higher than the development guide surface 26. The drum guide protrusion 25 is formed on the upper surface of the drum guide surface 24. The development guide protrusion 27 is formed on the upper surface of the development guide surface 26.
The drum guide surface 24 and the drum guide protrusion 25 guide the drum cartridge 40 mounted through the opening 22A. The drum guide surface 24 or the development guide surface 26 is provided with an opening (not shown) for passing the laser beam from the exposure apparatus SU.
The development guide surface 26 and the development guide protrusion 27 guide the development cartridge 50 mounted through the opening 22A.
　図６に示すように、カバーＣは、開口２２Ａを開閉するための部材である。カバーＣは、シャフトＣ１を有している。カバーＣは、シャフトＣ１が本体筐体２に回動可能に支持されることにより、本体筐体２に対して回動可能となる。カバーＣは、開口２２Ａを開ける開位置（図６（ｃ）参照）と、開口２２Ａを閉じる位置（図６（ａ）参照）との間を移動可能である。 As shown in FIG. 6, the cover C is a member for opening and closing the opening 22A. The cover C has a shaft C1. The cover C is rotatable with respect to the main body housing 2 because the shaft C1 is rotatably supported by the main body housing 2. The cover C is movable between an open position for opening the opening 22A (see FIG. 6C) and a position for closing the opening 22A (see FIG. 6A).
　図１および図３に示すように、ドラムカートリッジ４０は、ドラムフレームＦ１に感光ドラム４１が回転可能に支持されている。ドラムカートリッジ４０は、第１方向に本体筐体２に着脱可能となっている。各ドラムカートリッジ４０は、同じ構造となっている。
　また、ドラムカートリッジ４０のドラムフレームＦ１は、第１側面（図示せず）と第２側面４２を有する。第１側面は、ドラムカートリッジ４０が本体筐体２に装着された状態において、第１方向において開口２２Ａと向かい合う。第２側面４２は、第１方向において第１側面と離れて位置する。第２側面４２は、ドラムカートリッジ４０が本体筐体２に装着された状態において、第１側面よりも開口２２Ａから離れて位置する。
　ドラムカートリッジ４０は、ＩＣチップ４５を備える。ＩＣチップ４５は、ドラムメモリ（図示せず）と、接点４６を有している。接点４６は、第２側面４２に位置している。
なお、ドラムメモリと接点４６を離れた位置に配置することもできる。
　また、ドラムカートリッジ４０は、ドラムフレームＦ１の底面に、ドラムガイド突起２５が嵌るドラムガイド溝４８を有している。
　ドラムカートリッジ４０は、ドラムカートリッジ４０および現像カートリッジ５０が本体筐体２に装着された状態において、第２方向において、現像カートリッジ５０と並ぶ。 As shown in FIGS. 1 and 3, in the drum cartridge 40, the photosensitive drum 41 is rotatably supported by the drum frame F1. The drum cartridge 40 is removable from the main body housing 2 in the first direction. Each drum cartridge 40 has the same structure.
Further, the drum frame F1 of the drum cartridge 40 has a first side surface (not shown) and a second side surface 42. The first side surface faces the opening 22A in the first direction in a state where the drum cartridge 40 is mounted on the main body housing 2. The second side surface 42 is located away from the first side surface in the first direction. The second side surface 42 is located farther from the opening 22A than the first side surface when the drum cartridge 40 is mounted on the main body housing 2.
The drum cartridge 40 includes an IC chip 45. The IC chip 45 has a drum memory (not shown) and a contact 46. The contact 46 is located on the second side surface 42.
The drum memory and the contact 46 can also be arranged at separate positions.
Further, the drum cartridge 40 has a drum guide groove 48 in which the drum guide protrusion 25 is fitted on the bottom surface of the drum frame F1.
The drum cartridge 40 is aligned with the developing cartridge 50 in the second direction in a state where the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2.
　現像カートリッジ５０は、現像フレームＦ２に現像ローラ５１が回転可能に支持されている。現像カートリッジ５０は、第１方向に本体筐体２に着脱可能となっている。各現像カートリッジ５０は、同じ構造となっている。
　また、現像カートリッジ５０の現像フレームＦ２は、第１側面（図示せず）と第２側面５２を有する。第１側面は、現像カートリッジ５０が本体筐体２に装着された状態において、第１方向において開口２２Ａと向かい合う。第２側面５２は、第１方向において第１側面と離れて位置する。第２側面５２は、現像カートリッジ５０が本体筐体２に装着された状態において、第１側面よりも開口２２Ａから離れて位置する。
　現像カートリッジ５０は、ＩＣチップ５５を備える。ＩＣチップ５５は、現像メモリ（図示せず）と、接点５６を有している。接点５６は、第２側面５２に位置している。なお、現像メモリと接点５６を離れた位置に配置することもできる。
　また、現像カートリッジ５０は、現像フレームＦ２の底面に、現像ガイド突起２７が嵌る現像ガイド溝５８を有している。 In the developing cartridge 50, the developing roller 51 is rotatably supported by the developing frame F2. The developing cartridge 50 is removable from the main body housing 2 in the first direction. Each developing cartridge 50 has the same structure.
Further, the developing frame F2 of the developing cartridge 50 has a first side surface (not shown) and a second side surface 52. The first side surface faces the opening 22A in the first direction in a state where the developing cartridge 50 is mounted on the main body housing 2. The second side surface 52 is located away from the first side surface in the first direction. The second side surface 52 is located farther from the opening 22A than the first side surface when the developing cartridge 50 is mounted on the main body housing 2.
The developing cartridge 50 includes an IC chip 55. The IC chip 55 has a developing memory (not shown) and a contact 56. The contact 56 is located on the second side surface 52. The development memory and the contact 56 can be arranged at a distance from each other.
Further, the development cartridge 50 has a development guide groove 58 in which the development guide protrusion 27 is fitted on the bottom surface of the development frame F2.
　次に、図４から図９を参照して、カバーＣの開閉に連動して中間転写ベルト６３を感光ドラム４１に対して離間および接触させる構成について説明する。
　より詳細には、カラープリンタ１は、中間転写ベルト６３を備えるベルトユニット１００を備えている。そして、カバーＣの開閉に連動してベルトユニット１００が上下動することにより、中間転写ベルト６３が感光ドラム４１に対して離間および接触する。 Next, with reference to FIGS. 4 to 9, a configuration will be described in which the intermediate transfer belt 63 is separated and brought into contact with the photosensitive drum 41 in conjunction with the opening and closing of the cover C.
More specifically, the color printer 1 includes a belt unit 100 including an intermediate transfer belt 63. Then, the belt unit 100 moves up and down in conjunction with the opening and closing of the cover C, so that the intermediate transfer belt 63 separates and contacts the photosensitive drum 41.
　初めに、図４から図６を参照して、第１実施形態に係る構成について説明する。
　ベルトユニット１００は、中間転写ベルト６３と、第１ローラの一例としての駆動ローラ６１と、第２ローラの一例としての従動ローラ６２と、第１フレーム１０２と、第２フレーム１０６とを備える。
　第１フレーム１０２は、第１方向における中間転写ベルト６３の一端部６３Ａに位置する。つまり、第１フレーム１０２は、第１方向における駆動ローラ６１の一端部と、第１方向における従動ローラ６２の一端部に位置する。第１フレーム１０２は、駆動ローラ６１を回転可能に支持する第１ベアリングＢＲ１と、従動ローラ６２を回転可能に支持する第２ベアリングＢＲ２を支持する。
　また、第１フレーム１０２は、第１方向の外側に突出する２つの突起１０３を有している。各突起１０３は、第２方向に離れて位置する。
　第２フレーム１０６は、第１方向における中間転写ベルト６３の他端部６３Ｂに位置する。つまり、第２フレーム１０６は、第１方向における駆動ローラ６１の他端部と、第１方向における従動ローラ６２の他端部に位置する。第２フレーム１０６は、第１方向において第１フレーム１０２よりも開口２２Ａから離れて位置する。第２フレーム１０６は、駆動ローラ６１を回転可能に支持する第１ベアリングＢＲ１と、従動ローラ６２を回転可能に支持する第２ベアリングＢＲ２を支持する。
　また、第２フレーム１０６は、第１方向の外側に突出する２つの突起１０７を有している。各突起１０７は、第２方向に離れて位置する。
　駆動ローラ６１は、第１方向において第１フレーム１０２と第２フレーム１０６の間に位置する。同様に、従動ローラ６２は、第１方向において第１フレーム１０２と第２フレーム１０６の間に位置する。 First, the configuration according to the first embodiment will be described with reference to FIGS. 4 to 6.
The belt unit 100 includes an intermediate transfer belt 63, a drive roller 61 as an example of the first roller, a driven roller 62 as an example of the second roller, a first frame 102, and a second frame 106.
The first frame 102 is located at one end 63A of the intermediate transfer belt 63 in the first direction. That is, the first frame 102 is located at one end of the drive roller 61 in the first direction and one end of the driven roller 62 in the first direction. The first frame 102 supports a first bearing BR1 that rotatably supports the drive roller 61 and a second bearing BR2 that rotatably supports the driven roller 62.
Further, the first frame 102 has two protrusions 103 that project outward in the first direction. Each protrusion 103 is located apart in the second direction.
The second frame 106 is located at the other end 63B of the intermediate transfer belt 63 in the first direction. That is, the second frame 106 is located at the other end of the drive roller 61 in the first direction and the other end of the driven roller 62 in the first direction. The second frame 106 is located farther from the opening 22A than the first frame 102 in the first direction. The second frame 106 supports a first bearing BR1 that rotatably supports the drive roller 61 and a second bearing BR2 that rotatably supports the driven roller 62.
Further, the second frame 106 has two protrusions 107 protruding outward in the first direction. The protrusions 107 are located apart in the second direction.
The drive roller 61 is located between the first frame 102 and the second frame 106 in the first direction. Similarly, the driven roller 62 is located between the first frame 102 and the second frame 106 in the first direction.
　ベルトユニット１００は、本体筐体２の２つの離間リフト１２０によって支持されている。各離間リフト１２０は、第２方向に離れて位置する。第２方向における一方の離間リフト１２０は、第２方向における第１フレーム１０２の一端部と、第２方向における第２フレーム１０６の一端部と接触する。より詳細には、第２方向における一方の離間リフト１２０は、第１フレーム１０２の駆動ローラ６１に近い突起１０３と、第２フレーム１０６の駆動ローラ６１に近い突起１０７を支持する。第２方向における他方の離間リフト１２０は、第２方向における第１フレーム１０２の他端部と、第２方向における第２フレーム１０６の他端部と接触する。より詳細には、第２方向における他方の離間リフト１２０は、第１フレーム１０２の従動ローラ６２に近い突起１０３と、第２フレーム１０６の従動ローラ６２に近い突起１０７を支持する。
　各離間リフト１２０は、ベース部１２２と、２つの支持部１２４を備えている。
　ベース部１２２は、第１方向に長い板状の部材である。ベース部１２２は、ベルトユニット１００の下方に位置する。ベース部１２２の長さは、第１方向における第１フレーム１０２と第２フレーム１０６との間の距離よりも長い。ベース部１２２は、後述するリンク機構１４０のリフト板１４６と接触している。
　２つの支持部１２４は、それぞれベース部１２２から上方に延びている。各支持部１２４は、各支持部１２４の上端にリング部１２５を有する。一方のリング部１２５は、第１フレーム１０２の突起１０３が嵌る貫通穴１２６を有する。他方のリング部１２５は、第２フレーム１０６の突起１０７が嵌る貫通穴１２６を有する。
　第１フレーム１０２の一端部の突起１０３と、第２フレーム１０６の一端部の突起１０７が、各支持部１２４の貫通穴１２６に嵌ることで、第２方向におけるベルトユニット１００の一端部が、離間リフト１２０によって支持される。同様に、第１フレーム１０２の他端部の突起１０３と、第２フレーム１０６の他端部の突起１０７が、各支持部１２４の貫通穴１２６に嵌ることで、第２方向におけるベルトユニット１００の他端部が、離間リフト１２０によって支持される。 The belt unit 100 is supported by two separation lifts 120 of the main body housing 2. The separation lifts 120 are located apart in the second direction. One separation lift 120 in the second direction comes into contact with one end of the first frame 102 in the second direction and one end of the second frame 106 in the second direction. More specifically, one separation lift 120 in the second direction supports a protrusion 103 close to the drive roller 61 of the first frame 102 and a protrusion 107 close to the drive roller 61 of the second frame 106. The other separation lift 120 in the second direction comes into contact with the other end of the first frame 102 in the second direction and the other end of the second frame 106 in the second direction. More specifically, the other separation lift 120 in the second direction supports a protrusion 103 close to the driven roller 62 of the first frame 102 and a protrusion 107 close to the driven roller 62 of the second frame 106.
Each separation lift 120 includes a base portion 122 and two support portions 124.
The base portion 122 is a plate-shaped member that is long in the first direction. The base portion 122 is located below the belt unit 100. The length of the base portion 122 is longer than the distance between the first frame 102 and the second frame 106 in the first direction. The base portion 122 is in contact with the lift plate 146 of the link mechanism 140, which will be described later.
Each of the two support portions 124 extends upward from the base portion 122. Each support portion 124 has a ring portion 125 at the upper end of each support portion 124. One ring portion 125 has a through hole 126 into which the protrusion 103 of the first frame 102 fits. The other ring portion 125 has a through hole 126 into which the protrusion 107 of the second frame 106 fits.
By fitting the protrusion 103 at one end of the first frame 102 and the protrusion 107 at one end of the second frame 106 into the through holes 126 of the support portions 124, one end of the belt unit 100 in the second direction is separated. Supported by lift 120. Similarly, the protrusion 103 at the other end of the first frame 102 and the protrusion 107 at the other end of the second frame 106 fit into the through holes 126 of the support portions 124, so that the belt unit 100 in the second direction The other end is supported by the separation lift 120.
　本体筐体２は、カバーＣの開閉に連動して動く２つのリンク機構１４０を有する。一方のリンク機構１４０は、第２方向における第１フレーム１０２の一端部と第２方向における第２フレーム１０６の一端部に対応して、一方の離間リフト１２０の下方に位置する。
他方のリンク機構１４０は、第２方向における第１フレーム１０２の他端部と第２方向における第２フレーム１０６の他端部に対応して、他方の離間リフト１２０の下方に位置する。
　ベルトユニット１００は、２つのリンク機構１４０の動きによって、中間転写ベルト６３が感光ドラム４１と接触する接触位置（図６（ａ）参照）と、中間転写ベルト６３が感光ドラム４１から離間する離間位置（図６（ｃ）参照）との間を移動可能となっている。
　各リンク機構１４０は、第１アーム１４２と、第２アーム１４４と、リフト板１４６とを備えている。
　第１アーム１４２は、カバーＣの下端部にカバーＣと一体に形成されている。第１アーム１４２は、略半円形状の部材である。第１アーム１４２は、カバーＣがシャフトＣ１について回動することにより、本体筐体２に対して回動可能である。カバーＣが閉位置に位置するとき、第１アーム１４２は、カバーＣから第１方向に突出している。
　第２アーム１４４は、長尺状の部材である。第２アーム１４４は、一端部と他端部を有する。第２アーム１４４の一端部は、本体筐体２に回動可能に連結されている。第２アーム１４４の他端部は、第２アーム１４４の一端部を中心として、本体筐体２に対して回動可能である。カバーＣが閉位置に位置するとき、第２アーム１４４は、一端部と他端部が第１方向に並ぶ。
　リフト板１４６は、第１方向に長い板状の部材である。リフト板１４６は、一端部と、第１方向においてリフト板１４６の一端部から離れた他端部とを有する。リフト板１４６の一端部は、第１アーム１４２と連結され、リフト板１４６の他端部は、第２アーム１４４の他端部と連結される。リフト板１４６は、離間リフト１２０を支持する。 The main body housing 2 has two link mechanisms 140 that move in conjunction with the opening and closing of the cover C. One link mechanism 140 is located below one of the separation lifts 120, corresponding to one end of the first frame 102 in the second direction and one end of the second frame 106 in the second direction.
The other link mechanism 140 is located below the other separation lift 120, corresponding to the other end of the first frame 102 in the second direction and the other end of the second frame 106 in the second direction.
The belt unit 100 has a contact position where the intermediate transfer belt 63 comes into contact with the photosensitive drum 41 (see FIG. 6A) and a separation position where the intermediate transfer belt 63 is separated from the photosensitive drum 41 by the movement of the two link mechanisms 140. It is possible to move between (see FIG. 6 (c)).
Each link mechanism 140 includes a first arm 142, a second arm 144, and a lift plate 146.
The first arm 142 is integrally formed with the cover C at the lower end of the cover C. The first arm 142 is a member having a substantially semicircular shape. The first arm 142 is rotatable with respect to the main body housing 2 by rotating the cover C with respect to the shaft C1. When the cover C is in the closed position, the first arm 142 projects in the first direction from the cover C.
The second arm 144 is an elongated member. The second arm 144 has one end and the other end. One end of the second arm 144 is rotatably connected to the main body housing 2. The other end of the second arm 144 is rotatable with respect to the main body housing 2 about one end of the second arm 144. When the cover C is in the closed position, one end and the other end of the second arm 144 are aligned in the first direction.
The lift plate 146 is a plate-shaped member that is long in the first direction. The lift plate 146 has one end and the other end away from one end of the lift plate 146 in the first direction. One end of the lift plate 146 is connected to the first arm 142, and the other end of the lift plate 146 is connected to the other end of the second arm 144. The lift plate 146 supports the separation lift 120.
　次に、図６を参照して、カバーＣの開閉に連動して上下動するベルトユニット１００の動作を説明する。
　図６（ａ）に示すように、カバーＣが閉位置に位置するとき、カバーＣのシャフトＣ１と第１アーム１４２が第１方向に並び、第２アーム１４４の一端部と第２アーム１４４の他端部が第１方向に並ぶ。このとき、第１アーム１４２および第２アーム１４４と連結されたリフト板１４６は、下降位置に位置する。そして、リフト板１４６に支持された離間リフト１２０は、下降位置に対応した第２位置に位置する。そのため、支持部１２４によって支持されたベルトユニット１００は、本体筐体２に装着されたドラムカートリッジ４０および現像カートリッジ５０に対して下降し、中間転写ベルト６３が感光ドラム４１と接触する接触位置に位置する。
　つまり、カバーＣが閉位置に位置するときに、離間リフト１２０は第２位置に位置する。 Next, with reference to FIG. 6, the operation of the belt unit 100 that moves up and down in conjunction with the opening and closing of the cover C will be described.
As shown in FIG. 6A, when the cover C is in the closed position, the shaft C1 of the cover C and the first arm 142 are aligned in the first direction, and one end of the second arm 144 and the second arm 144 The other ends are lined up in the first direction. At this time, the lift plate 146 connected to the first arm 142 and the second arm 144 is located at the lowered position. The separation lift 120 supported by the lift plate 146 is located at a second position corresponding to the lowering position. Therefore, the belt unit 100 supported by the support portion 124 is lowered with respect to the drum cartridge 40 and the developing cartridge 50 mounted on the main body housing 2, and is positioned at a contact position where the intermediate transfer belt 63 comes into contact with the photosensitive drum 41. To do.
That is, when the cover C is in the closed position, the separation lift 120 is in the second position.
　図６（ｂ）に示すように、カバーＣを閉位置から開位置に向けて移動させると、第１アーム１４２および第２アーム１４４は、第１方向に対して傾斜する。このとき、第１アーム１４２および第２アーム１４４と連結されたリフト板１４６は、下降位置から上昇する。そして、リフト板１４６に支持された離間リフト１２０が上昇する。そのため、支持部１２４によって支持されたベルトユニット１００は、ドラムカートリッジ４０および現像カートリッジ５０に対して上昇し、中間転写ベルト６３が感光ドラム４１から離間し始める。 As shown in FIG. 6B, when the cover C is moved from the closed position to the open position, the first arm 142 and the second arm 144 are tilted with respect to the first direction. At this time, the lift plate 146 connected to the first arm 142 and the second arm 144 rises from the lowered position. Then, the separation lift 120 supported by the lift plate 146 rises. Therefore, the belt unit 100 supported by the support portion 124 rises with respect to the drum cartridge 40 and the developing cartridge 50, and the intermediate transfer belt 63 begins to separate from the photosensitive drum 41.
　図６（ｃ）に示すように、カバーＣが開位置に位置するとき、カバーＣのシャフトＣ１と第１アーム１４２が第１方向に対して垂直になり、第２アーム１４４が第１方向に対して垂直になる。このとき、第１アーム１４２および第２アーム１４４と連結されたリフト板１４６は、上昇位置に位置する。そして、リフト板１４６に支持された離間リフト１２０は、上昇位置に対応した第１位置に位置する。そのため、支持部１２４によって支持されたベルトユニット１００は、ドラムカートリッジ４０および現像カートリッジ５０に対して上昇し、中間転写ベルト６３が感光ドラム４１から離間する離間位置に位置する。
　つまり、カバーＣが開位置に位置するときに、離間リフト１２０は第１位置に位置する。
　また、離間リフト１２０は、離間リフト１２０が第１位置に位置する場合、第１フレーム１０２および第２フレーム１０６と接触し、離間リフト１２０が第２位置に位置する場合も、第１フレーム１０２および第２フレーム１０６と接触する。 As shown in FIG. 6C, when the cover C is in the open position, the shaft C1 of the cover C and the first arm 142 are perpendicular to the first direction, and the second arm 144 is in the first direction. Be perpendicular to it. At this time, the lift plate 146 connected to the first arm 142 and the second arm 144 is located at the raised position. The separation lift 120 supported by the lift plate 146 is located at the first position corresponding to the ascending position. Therefore, the belt unit 100 supported by the support portion 124 rises with respect to the drum cartridge 40 and the developing cartridge 50, and the intermediate transfer belt 63 is located at a separated position away from the photosensitive drum 41.
That is, when the cover C is in the open position, the separation lift 120 is in the first position.
Further, the separation lift 120 comes into contact with the first frame 102 and the second frame 106 when the separation lift 120 is located at the first position, and the first frame 102 and the separation lift 120 are also when the separation lift 120 is located at the second position. It comes into contact with the second frame 106.
　このように、中間転写ベルト６３は、ドラムカートリッジ４０が本体筐体２に装着された状態において、感光ドラム４１に対して、上下方向に移動可能である。
　そして、中間転写ベルト６３は、離間リフト１２０が第１位置に位置するときに、感光ドラム４１から離間し、離間リフト１２０が第２位置に位置するときに、感光ドラム４１と接触する。 In this way, the intermediate transfer belt 63 can move in the vertical direction with respect to the photosensitive drum 41 in a state where the drum cartridge 40 is mounted on the main body housing 2.
Then, the intermediate transfer belt 63 is separated from the photosensitive drum 41 when the separation lift 120 is located at the first position, and comes into contact with the photosensitive drum 41 when the separation lift 120 is located at the second position.
　ユーザは、カバーＣが開位置に位置するとき、開口２２Ａを通してドラムカートリッジ４０および現像カートリッジ５０を着脱する。
　このとき、ベルトユニット１００の中間転写ベルト６３は上昇した位置にあるので、ドラムカートリッジ４０を装着する際に、感光ドラム４１が中間転写ベルト６３と接触することなく、ドラムカートリッジ４０を円滑に本体筐体２に挿入することができる。
　なお、ユーザがカバーＣを閉位置に移動させると、押圧部材（図示せず）により現像カートリッジ５０が押圧され、現像ローラ５１が感光ドラム４１と接触する。 When the cover C is in the open position, the user attaches / detaches the drum cartridge 40 and the developing cartridge 50 through the opening 22A.
At this time, since the intermediate transfer belt 63 of the belt unit 100 is in the raised position, the photosensitive drum 41 does not come into contact with the intermediate transfer belt 63 when the drum cartridge 40 is attached, and the drum cartridge 40 can be smoothly mounted on the main body housing. It can be inserted into the body 2.
When the user moves the cover C to the closed position, the developing cartridge 50 is pressed by the pressing member (not shown), and the developing roller 51 comes into contact with the photosensitive drum 41.
　以上によれば、本実施形態において以下のような効果を得ることができる。
　中間転写ベルト６３が感光ドラム４１に対して移動可能であるので、ドラムカートリッジ４０は、本体筐体２に対して動かない。そのため、ドラムカートリッジ４０の接点４６が摩耗することを抑制できる。 Based on the above, the following effects can be obtained in the present embodiment.
Since the intermediate transfer belt 63 is movable with respect to the photosensitive drum 41, the drum cartridge 40 does not move with respect to the main body housing 2. Therefore, it is possible to prevent the contact 46 of the drum cartridge 40 from being worn.
　前述した実施形態では、ベルトユニット１００が常に離間リフト１２０に支持されているが、本開示は前述した実施形態に限定されるものではない。
　例えば、図４に仮想線で示すように、本体筐体２は、離間リフト１２０が下降した第２位置にあるときにベルトユニット１００を支持する支持部３０を有する構成とすることもできる。この場合、離間リフト１２０は、第２位置にあるときに、ベルトユニット１００から離間する構成としてもよい。そして、離間リフト１２０のリング部１２５は、突起１０３または突起１０７を下から支持するように、例えば、Ｕ字部またはＶ字部に変更する必要がある。 In the above-described embodiment, the belt unit 100 is always supported by the separation lift 120, but the present disclosure is not limited to the above-described embodiment.
For example, as shown by a virtual line in FIG. 4, the main body housing 2 may have a support portion 30 that supports the belt unit 100 when the separation lift 120 is in the lowered second position. In this case, the separation lift 120 may be configured to separate from the belt unit 100 when it is in the second position. Then, the ring portion 125 of the separation lift 120 needs to be changed to, for example, a U-shaped portion or a V-shaped portion so as to support the protrusion 103 or the protrusion 107 from below.
　次に、図７および図８を参照して、第２実施形態に係る構成について説明する。
　以下の説明において、第１実施形態と同様の構成要素については同一符号を付し、詳細な説明を省略する。
　本実施形態では、本体筐体２は、１つの離間リフト１２０と、１つのリンク機構１４０を有している。より詳細には、離間リフト１２０とリンク機構１４０は、第２方向における第１フレーム１０２の他端部と第２方向における第２フレーム１０６の他端部に位置する。
　一方、第２方向における第１フレーム１０２の一端部は、貫通穴１０５を有している。
同様に、第２方向における第２フレーム１０６の一端部は、貫通穴（図示せず）を有している。第１フレーム１０２の一端部の貫通穴１０５と第２フレーム１０６の一端部の貫通穴に、本体筐体２のシャフト（図示せず）が挿入されることで、ベルトユニット１００が、第１回転軸Ｘ５について回動可能となる。第１回転軸Ｘ５は、第３軸Ｘ３に平行で、第２方向において第４軸Ｘ４よりも第３軸Ｘ３に近い。より詳細には、第２方向において、第１回転軸Ｘ５から第３軸Ｘ３までの距離は、第１回転軸Ｘ５から第４軸Ｘ４までの距離よりも小さくなっている。
　中間転写ベルト６３は、ドラムカートリッジ４０が本体筐体２に装着された状態において、感光ドラム４１に対して第１回転軸Ｘ５について回動可能である。 Next, the configuration according to the second embodiment will be described with reference to FIGS. 7 and 8.
In the following description, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.
In the present embodiment, the main body housing 2 has one separation lift 120 and one link mechanism 140. More specifically, the separation lift 120 and the link mechanism 140 are located at the other end of the first frame 102 in the second direction and the other end of the second frame 106 in the second direction.
On the other hand, one end of the first frame 102 in the second direction has a through hole 105.
Similarly, one end of the second frame 106 in the second direction has a through hole (not shown). By inserting the shaft (not shown) of the main body housing 2 into the through hole 105 at one end of the first frame 102 and the through hole at one end of the second frame 106, the belt unit 100 rotates in the first rotation. It becomes rotatable about the shaft X5. The first rotation axis X5 is parallel to the third axis X3 and is closer to the third axis X3 than the fourth axis X4 in the second direction. More specifically, in the second direction, the distance from the first rotation axis X5 to the third axis X3 is smaller than the distance from the first rotation axis X5 to the fourth axis X4.
The intermediate transfer belt 63 is rotatable about the first rotation shaft X5 with respect to the photosensitive drum 41 in a state where the drum cartridge 40 is mounted on the main body housing 2.
　このような構成によると、カバーＣが閉位置に位置するとき、図７に示すように、離間リフト１２０が下降位置に対応した第２位置に位置する。このとき、ベルトユニット１００は、本体筐体２に装着されたドラムカートリッジ４０および現像カートリッジ５０に対して下降した位置にあり、中間転写ベルト６３が感光ドラム４１と接触している。 According to such a configuration, when the cover C is in the closed position, the separation lift 120 is located in the second position corresponding to the lowering position as shown in FIG. 7. At this time, the belt unit 100 is in a position lowered with respect to the drum cartridge 40 and the developing cartridge 50 mounted on the main body housing 2, and the intermediate transfer belt 63 is in contact with the photosensitive drum 41.
　カバーＣが開位置に位置するとき、図８に示すように、離間リフト１２０が上昇位置に対応した第１位置に位置する。このとき、ベルトユニット１００は、第１回転軸Ｘ５について回動し、第２方向における第１フレーム１０２の他端部と第２方向における第２フレーム１０６の他端部が、離間リフト１２０によって上昇される。つまり、第２方向におけるベルトユニット１００の他端部は、本体筐体２に装着されたドラムカートリッジ４０および現像カートリッジ５０に対して上昇した位置にあり、中間転写ベルト６３が感光ドラム４１から離間する。 When the cover C is in the open position, as shown in FIG. 8, the separation lift 120 is located in the first position corresponding to the ascending position. At this time, the belt unit 100 rotates about the first rotation shaft X5, and the other end of the first frame 102 in the second direction and the other end of the second frame 106 in the second direction are raised by the separation lift 120. Will be done. That is, the other end of the belt unit 100 in the second direction is in a raised position with respect to the drum cartridge 40 and the developing cartridge 50 mounted on the main body housing 2, and the intermediate transfer belt 63 is separated from the photosensitive drum 41. ..
　本実施形態によると、カバーＣが開位置に位置するとき、第２方向におけるベルトユニット１００の中間転写ベルト６３の他端部が、上昇した位置にあるので、ドラムカートリッジ４０を装着する際に、感光ドラム４１が中間転写ベルト６３と接触することなく、ドラムカートリッジ４０を円滑に本体筐体２に挿入することができる。
　また、中間転写ベルト６３が感光ドラム４１に対して移動可能であるので、ドラムカートリッジ４０は、本体筐体２に対して動かない。そのため、ドラムカートリッジ４０の接点４６が摩耗することを抑制できる。 According to the present embodiment, when the cover C is in the open position, the other end of the intermediate transfer belt 63 of the belt unit 100 in the second direction is in the raised position, so that when the drum cartridge 40 is mounted, the other end is in the raised position. The drum cartridge 40 can be smoothly inserted into the main body housing 2 without the photosensitive drum 41 coming into contact with the intermediate transfer belt 63.
Further, since the intermediate transfer belt 63 is movable with respect to the photosensitive drum 41, the drum cartridge 40 does not move with respect to the main body housing 2. Therefore, it is possible to prevent the contact 46 of the drum cartridge 40 from being worn.
　なお、ベルトユニット１００の第１回転軸Ｘ５の位置を、第２方向における第１フレーム１０２の他端部と第２方向における第２フレーム１０６の他端部に変更してもよい。この場合、第２方向における第１フレーム１０２の一端部と第２方向における第２フレーム１０６の一端部側が、離間リフト１２０によって上昇または下降する構成となる。この場合、従動ローラ６２が第１ローラ、駆動ローラ６１が第２ローラに対応する。
　このような構成によると、離間リフト１２０は、離間リフト１２０が第１位置に位置する場合に、離間リフト１２０が、第２方向における第１フレーム１０２の一端部および第２方向における第２フレーム１０６の一端部と接触し、離間リフト１２０が、第２方向における第１フレーム１０２の他端部および第２方向における第２フレーム１０６の他端部と接触しない。 The position of the first rotation axis X5 of the belt unit 100 may be changed to the other end of the first frame 102 in the second direction and the other end of the second frame 106 in the second direction. In this case, one end of the first frame 102 in the second direction and one end side of the second frame 106 in the second direction are configured to be raised or lowered by the separation lift 120. In this case, the driven roller 62 corresponds to the first roller, and the driving roller 61 corresponds to the second roller.
According to such a configuration, when the separation lift 120 is located in the first position, the separation lift 120 is one end of the first frame 102 in the second direction and the second frame 106 in the second direction. The separation lift 120 does not contact the other end of the first frame 102 in the second direction and the other end of the second frame 106 in the second direction.
　次に、図９および図１０を参照して、第３実施形態に係る構成について説明する。
　以下の説明において、第１実施形態と同様の構成要素については同一符号を付し、詳細な説明を省略する。
　本実施形態では、カバーＣの開閉と連動する２つの離間リフト２２０（一方のみ図面に示す）によって、第２フレーム１０６を通る第２回転軸Ｘ６を回動中心として、第１フレーム１０２が上昇または下降する。
　より詳細には、第２フレーム１０６は、第２方向における第２フレーム１０６の一端部に位置する突起１０７と、第２方向における第２フレーム１０６の他端部に位置する突起１０７と、を有する。各突起１０７が、貫通穴１０８を有している。各突起１０７の貫通穴１０８に、本体筐体２のシャフト（図示せず）が挿入されることで、ベルトユニット１００が、第２回転軸Ｘ６について回動可能となる。つまり、中間転写ベルト６３は、第１方向と交差する第２方向に平行で、第２フレーム１０６と交差する第２回転軸Ｘ６について回動可能である。 Next, the configuration according to the third embodiment will be described with reference to FIGS. 9 and 10.
In the following description, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.
In the present embodiment, the first frame 102 is raised or raised around the second rotation axis X6 passing through the second frame 106 by two separation lifts 220 (only one of which is shown in the drawing) interlocking with the opening and closing of the cover C. Descend.
More specifically, the second frame 106 has a protrusion 107 located at one end of the second frame 106 in the second direction and a protrusion 107 located at the other end of the second frame 106 in the second direction. .. Each protrusion 107 has a through hole 108. By inserting the shaft (not shown) of the main body housing 2 into the through hole 108 of each protrusion 107, the belt unit 100 can rotate about the second rotation shaft X6. That is, the intermediate transfer belt 63 is parallel to the second direction intersecting the first direction and is rotatable about the second rotation axis X6 intersecting the second frame 106.
　図１０に示すように、カバーＣは、カバーＣの回動中心ＣＸから離れた位置に２つの突起Ｃ３を有している。一方の突起Ｃ３は、第１方向におけるカバーＣの一端部に位置する。他方の突起Ｃ３は、第１方向におけるカバーＣの他端部に位置する。
　２つの離間リフト２２０は、第１方向において、第１方向における中間転写ベルト６３の一端部と開口２２Ａの間に位置している。一方の離間リフトは、第２方向における第１フレーム１０２の一端部の突起１０３を支持する。他方の離間リフト２２０は、第２方向における第１フレーム１０２の他端部の突起１０３を支持する。各離間リフト２２０は、Ｌ字形状を有している。各離間リフト２２０は、直線状に延びる本体部２２２と、支持部２２３（図９参照）と、脚部２２４とを備えている。
　支持部２２３は、本体部２２２の上端部に位置する。支持部２２３は、突起１０３を下から支持するため、Ｕ字形状の溝を有している。
　脚部２２４は、本体部２２２の下端部からカバーＣに向けて延びる。脚部２２４は、カバーＣの突起Ｃ３が嵌る長穴２２５を有する。
　また、本体筐体２は、各離間リフト２２０の本体部２２２をガイドする一対のガイド部２８を備えている。
　離間リフト２２０が第１位置に位置する場合に、離間リフト２２０は、第１フレーム１０２と接触し、第２フレーム１０６と接触しない。 As shown in FIG. 10, the cover C has two protrusions C3 at positions separated from the rotation center CX of the cover C. One protrusion C3 is located at one end of the cover C in the first direction. The other protrusion C3 is located at the other end of the cover C in the first direction.
The two separation lifts 220 are located in the first direction between one end of the intermediate transfer belt 63 and the opening 22A in the first direction. One separation lift supports a protrusion 103 at one end of the first frame 102 in the second direction. The other separation lift 220 supports the protrusion 103 at the other end of the first frame 102 in the second direction. Each separation lift 220 has an L shape. Each separation lift 220 includes a main body portion 222 extending linearly, a support portion 223 (see FIG. 9), and a leg portion 224.
The support portion 223 is located at the upper end portion of the main body portion 222. The support portion 223 has a U-shaped groove for supporting the protrusion 103 from below.
The leg portion 224 extends from the lower end portion of the main body portion 222 toward the cover C. The leg portion 224 has an elongated hole 225 into which the protrusion C3 of the cover C fits.
Further, the main body housing 2 includes a pair of guide portions 28 that guide the main body portions 222 of each separation lift 220.
When the separation lift 220 is located in the first position, the separation lift 220 contacts the first frame 102 and not the second frame 106.
　図１０（ａ）に示すように、カバーＣが閉位置に位置するとき、カバーＣの突起Ｃ３は、脚部２２４の長穴２２５の一端に位置している。このとき、離間リフト２２０は下降位置に対応した第２位置にある。また、図９（ａ）に示すように、離間リフト２２０が第２位置にあるとき、支持部２２３に一端部が支持されたベルトユニット１００は、本体筐体２に装着されたドラムカートリッジ４０および現像カートリッジ５０に対して下降した位置にあり、中間転写ベルト６３が感光ドラム４１と接触している。 As shown in FIG. 10A, when the cover C is located in the closed position, the protrusion C3 of the cover C is located at one end of the elongated hole 225 of the leg portion 224. At this time, the separation lift 220 is in the second position corresponding to the lowering position. Further, as shown in FIG. 9A, when the separation lift 220 is in the second position, the belt unit 100 whose one end is supported by the support portion 223 is the drum cartridge 40 mounted on the main body housing 2 and the belt unit 100. It is in a position lowered with respect to the developing cartridge 50, and the intermediate transfer belt 63 is in contact with the photosensitive drum 41.
　図１０（ｂ）に示すように、カバーＣを閉位置から開位置に向けて移動させると、突起Ｃ３がカバーＣの回動中心ＣＸについて回動する。そして、突起Ｃ３は、脚部２２４の長穴２２５の縁を上方に押圧する。これにより、離間リフト２２０の本体部２２２は、ガイド部２８にガイドされて上昇する。このとき、離間リフト２２０は、第２位置から僅かに上昇した位置にある。ベルトユニット１００は、第２回転軸Ｘ６について回動し、第１フレーム１０２が離間リフト１２０によって上昇し始める。 As shown in FIG. 10B, when the cover C is moved from the closed position to the open position, the protrusion C3 rotates about the rotation center CX of the cover C. Then, the protrusion C3 presses the edge of the elongated hole 225 of the leg portion 224 upward. As a result, the main body portion 222 of the separation lift 220 is guided by the guide portion 28 and rises. At this time, the separation lift 220 is in a position slightly raised from the second position. The belt unit 100 rotates about the second rotation shaft X6, and the first frame 102 starts to rise by the separation lift 120.
　図１０（ｃ）に示すように、カバーＣが開位置に位置するとき、突起Ｃ３は、脚部２２４の長穴２２５の他端に位置している。このとき、離間リフト２２０の本体部２２２は、ガイド部２８にガイドされてさらに上昇し、離間リフト２２０は上昇位置に対応した第１位置にある。また、図９（ｂ）に示すように、離間リフト２２０が第１位置にあるとき、ベルトユニット１００は、本体筐体２に装着されたドラムカートリッジ４０および現像カートリッジ５０に対して上昇した位置にあり、中間転写ベルト６３が感光ドラム４１から離間する。 As shown in FIG. 10 (c), when the cover C is located in the open position, the protrusion C3 is located at the other end of the elongated hole 225 of the leg portion 224. At this time, the main body portion 222 of the separation lift 220 is further raised by being guided by the guide portion 28, and the separation lift 220 is in the first position corresponding to the rising position. Further, as shown in FIG. 9B, when the separation lift 220 is in the first position, the belt unit 100 is in a raised position with respect to the drum cartridge 40 and the developing cartridge 50 mounted on the main body housing 2. Yes, the intermediate transfer belt 63 is separated from the photosensitive drum 41.
　本実施形態によると、カバーＣが開位置に位置するとき、第１方向におけるベルトユニット１００の中間転写ベルト６３の一端部は、本体筐体２に装着されたドラムカートリッジ４０に対して上昇した位置にあるので、ドラムカートリッジ４０を装着する際に、感光ドラム４１が中間転写ベルト６３と接触することなく、ドラムカートリッジ４０を円滑に本体筐体２に挿入することができる。
　また、中間転写ベルト６３が感光ドラム４１に対して移動可能であるので、ドラムカートリッジ４０は、本体筐体２に対して動かない。そのため、ドラムカートリッジ４０の接点４６が摩耗することを抑制できる。 According to the present embodiment, when the cover C is in the open position, one end of the intermediate transfer belt 63 of the belt unit 100 in the first direction is in a raised position with respect to the drum cartridge 40 mounted on the main body housing 2. Therefore, when the drum cartridge 40 is mounted, the drum cartridge 40 can be smoothly inserted into the main body housing 2 without the photosensitive drum 41 coming into contact with the intermediate transfer belt 63.
Further, since the intermediate transfer belt 63 is movable with respect to the photosensitive drum 41, the drum cartridge 40 does not move with respect to the main body housing 2. Therefore, it is possible to prevent the contact 46 of the drum cartridge 40 from being worn.
　前述した実施形態では、カラープリンタ１に本開示を適用したが、本開示はこれに限定されず、その他の画像形成装置、例えばモノクロのプリンタ、複写機、複合機などに本開示を適用してもよい。 In the above-described embodiment, the present disclosure is applied to the color printer 1, but the present disclosure is not limited to this, and the present disclosure is applied to other image forming devices such as monochrome printers, copiers, and multifunction devices. May be good.
　前述した実施形態では、ＩＣチップ４５の接点４６を、ドラムカートリッジ４０の接点としたが、本開示はこのような構成に限定されない。例えば、帯電ローラに電気的に接続される接点、或いは、その他の接点を、ドラムカートリッジ４０の接点としてもよい。 In the above-described embodiment, the contact 46 of the IC chip 45 is the contact of the drum cartridge 40, but the present disclosure is not limited to such a configuration. For example, a contact electrically connected to the charging roller or another contact may be a contact of the drum cartridge 40.
　前述した実施形態および変形例で説明した各要素を、任意に組み合わせて実施してもよい。 Each element described in the above-described embodiment and modification may be arbitrarily combined and implemented.
　１　　　カラープリンタ
　２　　　本体筐体
　４０　　ドラムカートリッジ
　４１　　感光ドラム
　４６　　接点
　５０　　現像カートリッジ
　５１　　現像ローラ
　６３　　中間転写ベルト
　１２０　離間リフト
　Ｃ　　　カバー 1 Color printer 2 Main body housing 40 Drum cartridge 41 Photosensitive drum 46 Contact 50 Development cartridge 51 Development roller 63 Intermediate transfer belt 120 Separation lift C cover

Claims (16)

  1. 　開口を有する本体筐体と、
    　前記開口を開ける開位置と前記開口を閉じる閉位置との間を移動可能なカバーと、
    　第１方向に延びる第１軸について回転可能な感光ドラムと接点とを有するドラムカートリッジであって、前記第１方向に前記本体筐体に着脱可能なドラムカートリッジと、
    　前記第１方向に延びる第２軸について回転可能な現像ローラを有する現像カートリッジであって、前記第１方向に前記本体筐体に着脱可能な現像カートリッジと、
    　前記ドラムカートリッジおよび前記現像カートリッジが前記本体筐体に装着された状態において、前記ドラムカートリッジおよび前記現像カートリッジの上方に位置する中間転写ベルトであって、前記ドラムカートリッジが前記本体筐体に装着された状態で、前記感光ドラムに対して移動可能な中間転写ベルトを備えるベルトユニットと、
    　前記カバーが前記開位置に位置するときに第１位置に位置し、前記カバーが前記閉位置に位置するときに第２位置に位置する離間リフトと、を備える画像形成装置であって、
    　前記中間転写ベルトは、
    　　前記離間リフトが第１位置に位置するときに、前記感光ドラムから離間し、
    　　前記離間リフトが第２位置に位置するときに、前記感光ドラムと接触することを特徴とする画像形成装置。     The main body housing with an opening and
    A cover that can be moved between the open position that opens the opening and the closed position that closes the opening.
    A drum cartridge having a photosensitive drum and a contact that can rotate about a first axis extending in the first direction, and a drum cartridge that can be attached to and detached from the main body housing in the first direction.
    A developing cartridge having a developing roller that is rotatable about a second axis extending in the first direction, and a developing cartridge that can be attached to and detached from the main body housing in the first direction.
    In a state where the drum cartridge and the developing cartridge are mounted on the main body housing, an intermediate transfer belt located above the drum cartridge and the developing cartridge, and the drum cartridge is mounted on the main body housing. In the state, a belt unit provided with an intermediate transfer belt that can be moved with respect to the photosensitive drum, and
    An image forming apparatus comprising a separation lift that is located in a first position when the cover is in the open position and in a second position when the cover is in the closed position.
    The intermediate transfer belt
    When the separation lift is located in the first position, it separates from the photosensitive drum and
    An image forming apparatus characterized in that when the separation lift is located at a second position, it comes into contact with the photosensitive drum.
  2. 　前記中間転写ベルトは、
    　　前記ドラムカートリッジが前記本体筐体に装着された状態において、前記感光ドラムに対して、上下方向に移動可能であることを特徴とする請求項１に記載の画像形成装置。     The intermediate transfer belt
    The image forming apparatus according to claim 1, wherein the drum cartridge can be moved in the vertical direction with respect to the photosensitive drum in a state of being mounted on the main body housing.
  3. 　前記ベルトユニットは、
    　　前記第１方向における前記中間転写ベルトの一端部に位置する第１フレームと、
    　　前記第１方向における前記中間転写ベルトの他端部に位置する第２フレームであって、前記第１方向において前記第１フレームよりも前記開口から離れて位置する第２フレームと、を備え、
    　前記離間リフトは、
    　　前記離間リフトが前記第１位置に位置する場合、前記第１フレームおよび前記第２フレームと接触することを特徴とする請求項２に記載の画像形成装置。     The belt unit is
    A first frame located at one end of the intermediate transfer belt in the first direction, and
    A second frame located at the other end of the intermediate transfer belt in the first direction, and a second frame located farther from the opening than the first frame in the first direction.
    The separation lift
    The image forming apparatus according to claim 2, wherein when the separation lift is located at the first position, it comes into contact with the first frame and the second frame.
  4. 　前記第１方向に延びる第３軸について回転可能な第１ローラであって、前記中間転写ベルトの内周面に位置する第１ローラであり、前記第１方向において前記第１フレームと前記第２フレームの間に位置する第１ローラと、
    　前記第１方向に延びる第４軸について回転可能な第２ローラであって、前記中間転写ベルトの内周面に位置する第２ローラであり、前記第１方向において前記第１フレームと前記第２フレームの間に位置する第２ローラであり、前記第１方向と交差する第２方向において前記第１ローラと離れて位置する第２ローラと、を備えることを特徴とする請求項３に記載の画像形成装置。     A first roller that is rotatable about a third axis extending in the first direction and is a first roller located on the inner peripheral surface of the intermediate transfer belt. In the first direction, the first frame and the second roller. The first roller located between the frames and
    A second roller that is rotatable about a fourth axis extending in the first direction and is a second roller located on the inner peripheral surface of the intermediate transfer belt. In the first direction, the first frame and the second roller. The third aspect of claim 3, wherein the second roller is located between the frames and includes a second roller located apart from the first roller in the second direction intersecting the first direction. Image forming device.
  5. 　前記第１ローラは、前記中間転写ベルトを駆動するための駆動ローラであり、
    　前記第２ローラは、前記中間転写ベルトの駆動に従い回転する従動ローラであることを特徴とする請求項４に記載の画像形成装置。     The first roller is a drive roller for driving the intermediate transfer belt.
    The image forming apparatus according to claim 4, wherein the second roller is a driven roller that rotates according to the drive of the intermediate transfer belt.
  6. 　前記ドラムカートリッジは、前記ドラムカートリッジおよび前記現像カートリッジが前記本体筐体に装着された状態において、前記第２方向において、前記現像カートリッジと並ぶことを特徴とする請求項４または請求項５に記載の画像形成装置。 The fourth or fifth aspect of the present invention, wherein the drum cartridge is aligned with the developing cartridge in the second direction in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. Image forming device.
  7. 　前記第１方向に延びる第３軸について回転可能な第１ローラであって、前記中間転写ベルトの内周面に位置する第１ローラと、
    　前記第１方向に延びる第４軸について回転可能な第２ローラであって、前記中間転写ベルトの内周面に位置する第２ローラであり、前記第１方向と交差する第２方向において前記第１ローラと離れて位置する第２ローラと、を備え、
    　前記中間転写ベルトは、
    　　前記ドラムカートリッジが前記本体筐体に装着された状態において、前記感光ドラムに対して、前記第１方向に延びる第１回転軸について回動可能であることを特徴とする請求項１に記載の画像形成装置。     A first roller that is rotatable about a third axis extending in the first direction and is located on the inner peripheral surface of the intermediate transfer belt.
    A second roller rotatable about a fourth axis extending in the first direction, a second roller located on the inner peripheral surface of the intermediate transfer belt, and the first roller in a second direction intersecting the first direction. It is equipped with a second roller located away from the first roller.
    The intermediate transfer belt
    The image according to claim 1, wherein the drum cartridge is rotatable about a first rotation axis extending in the first direction with respect to the photosensitive drum in a state of being mounted on the main body housing. Forming device.
  8. 　前記第１ローラは、前記中間転写ベルトを駆動するための駆動ローラであり、
    　前記第２ローラは、前記中間転写ベルトの駆動に従い回転する従動ローラであることを特徴とする請求項７に記載の画像形成装置。     The first roller is a drive roller for driving the intermediate transfer belt.
    The image forming apparatus according to claim 7, wherein the second roller is a driven roller that rotates according to the drive of the intermediate transfer belt.
  9. 　前記ベルトユニットは、
    　　前記第１方向における前記中間転写ベルトの一端部に位置する第１フレームであって、前記第１方向における前記第１ローラの一端部と、前記第１方向における前記第２ローラの一端部に位置する第１フレームと、
    　　前記第１方向における前記中間転写ベルトの他端部に位置する第２フレームであって、前記第１方向における前記第１ローラの他端部と、前記第１方向における前記第２ローラの他端部に位置する第２フレームであり、前記第１方向において前記第１フレームより前記開口から離れて位置する第２フレームと、を備え、
    　前記離間リフトは、前記第１位置に位置する場合に、
    　　前記第２方向における前記第１フレームの一端部および前記第２方向における前記第２フレームの一端部と接触し、
    　　前記第２方向における前記第１フレームの他端部および前記第２方向における前記第２フレームの他端部と接触しない、ことを特徴とする請求項７または請求項８に記載の画像形成装置。     The belt unit is
    A first frame located at one end of the intermediate transfer belt in the first direction, located at one end of the first roller in the first direction and one end of the second roller in the first direction. The first frame to do and
    A second frame located at the other end of the intermediate transfer belt in the first direction, the other end of the first roller in the first direction and the other end of the second roller in the first direction. A second frame located in a portion, including a second frame located away from the opening in the first direction from the first frame.
    When the separation lift is located at the first position,
    In contact with one end of the first frame in the second direction and one end of the second frame in the second direction,
    The image forming apparatus according to claim 7 or 8, wherein the other end of the first frame in the second direction and the other end of the second frame in the second direction do not come into contact with each other.
  10. 　前記ドラムカートリッジは、前記ドラムカートリッジおよび前記現像カートリッジが前記本体筐体に装着された状態において、前記第２方向において、前記現像カートリッジと並ぶことを特徴とする請求項７から請求項９のいずれか一項に記載の画像形成装置。 Any of claims 7 to 9, wherein the drum cartridge is aligned with the developing cartridge in the second direction in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. The image forming apparatus according to claim 1.
  11. 　前記ベルトユニットは、
    　　前記第１方向における前記中間転写ベルトの一端部に位置する第１フレームと、
    　　前記第１方向における前記中間転写ベルトの他端部に位置する第２フレームであって、前記第１方向において前記第１フレームよりも前記開口から離れて位置する第２フレームと、
    　前記第１方向に延びる第３軸について回転可能な第１ローラであって、前記中間転写ベルトの内周面に位置する第１ローラと、
    　前記第１方向に延びる第４軸について回転可能な第２ローラであって、前記中間転写ベルトの内周面に位置する第２ローラであり、前記第１方向と交差する第２方向において前記第１ローラと離れて位置する第２ローラと、を備え、
    　前記中間転写ベルトは、
    　　前記第２方向に平行で、前記第２フレームと交差する第２回転軸について回動可能であることを特徴とする請求項１に記載の画像形成装置。     The belt unit is
    A first frame located at one end of the intermediate transfer belt in the first direction, and
    A second frame located at the other end of the intermediate transfer belt in the first direction, and a second frame located farther from the opening than the first frame in the first direction.
    A first roller that is rotatable about a third axis extending in the first direction and is located on the inner peripheral surface of the intermediate transfer belt.
    A second roller rotatable about a fourth axis extending in the first direction, a second roller located on the inner peripheral surface of the intermediate transfer belt, and the first roller in a second direction intersecting the first direction. It is equipped with a second roller located away from the first roller.
    The intermediate transfer belt
    The image forming apparatus according to claim 1, wherein the image forming apparatus is parallel to the second direction and is rotatable about a second rotation axis that intersects the second frame.
  12. 　前記第１フレームは、前記第１方向における前記第１ローラの一端部と、前記第１方向における前記第２ローラの一端部に位置し、
    　前記第２フレームは、前記第１方向における前記第１ローラの他端部と、前記第１方向における前記第２ローラの他端部に位置し、
    　前記離間リフトは、前記第１位置に位置する場合に、
    　　前記第１フレームと接触し、
    　　前記第２フレームと接触しない、ことを特徴とする請求項１１に記載の画像形成装置。     The first frame is located at one end of the first roller in the first direction and one end of the second roller in the first direction.
    The second frame is located at the other end of the first roller in the first direction and the other end of the second roller in the first direction.
    When the separation lift is located at the first position,
    In contact with the first frame,
    The image forming apparatus according to claim 11, wherein the image forming apparatus does not come into contact with the second frame.
  13. 　前記第１ローラは、前記中間転写ベルトを駆動するための駆動ローラであり、
    　前記第２ローラは、前記中間転写ベルトの駆動に従い回転する従動ローラであることを特徴とする請求項１１または請求項１２に記載の画像形成装置。     The first roller is a drive roller for driving the intermediate transfer belt.
    The image forming apparatus according to claim 11, wherein the second roller is a driven roller that rotates according to the drive of the intermediate transfer belt.
  14. 　前記ドラムカートリッジは、
    　　前記ドラムカートリッジおよび前記現像カートリッジが前記本体筐体に装着された状態において、前記第２方向において、前記現像カートリッジと並ぶことを特徴とする請求項１１から請求項１３のいずれか一項に記載の画像形成装置。     The drum cartridge is
    The method according to any one of claims 11 to 13, wherein the drum cartridge and the developing cartridge are aligned with the developing cartridge in the second direction in a state of being mounted on the main body housing. Image forming device.
  15. 　前記ドラムカートリッジは、
    　　第１側面と、
    　　前記第１方向において前記第１側面と離れて位置する第２側面であって、前記ドラムカートリッジが前記本体筐体に装着された状態において、前記第１側面よりも前記開口から離れて位置する第２側面と、を有し、
    　前記接点は、
    　　前記第２側面に位置することを特徴とする請求項１から請求項１４のいずれか一項に記載の画像形成装置。     The drum cartridge is
    First side and
    A second side surface that is located away from the first side surface in the first direction, and is located farther from the opening than the first side surface when the drum cartridge is mounted on the main body housing. Has two sides,
    The contact is
    The image forming apparatus according to any one of claims 1 to 14, wherein the image forming apparatus is located on the second side surface.
  16. 　前記ドラムカートリッジはＩＣチップを備え、前記ＩＣチップが前記接点を有することを特徴とする請求項１から請求項１５のいずれか一項に記載の画像形成装置。
          The image forming apparatus according to any one of claims 1 to 15, wherein the drum cartridge includes an IC chip, and the IC chip has the contact.
PCT/JP2019/023243 2019-03-13 2019-06-12 Image forming apparatus WO2020183744A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-045654 2019-03-13
JP2019045654A JP2020148881A (en) 2019-03-13 2019-03-13 Image formation device

Publications (1)

Publication Number Publication Date
WO2020183744A1 true WO2020183744A1 (en) 2020-09-17

Family

ID=72427820

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/023243 WO2020183744A1 (en) 2019-03-13 2019-06-12 Image forming apparatus

Country Status (2)

Country Link
JP (1) JP2020148881A (en)
WO (1) WO2020183744A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000194248A (en) * 1998-12-28 2000-07-14 Canon Inc Process cartridge, electrifying unit and developing unit
JP2001154507A (en) * 1999-11-30 2001-06-08 Fuji Xerox Co Ltd Image forming device
JP2003316233A (en) * 2002-02-19 2003-11-07 Ricoh Co Ltd Image forming apparatus
US20050002690A1 (en) * 2003-07-03 2005-01-06 Ki-Ju Park Tandem color image forming device
JP2007304500A (en) * 2006-05-15 2007-11-22 Canon Inc Image forming apparatus
JP2008310292A (en) * 2007-05-15 2008-12-25 Canon Inc Image forming apparatus
JP2009157209A (en) * 2007-12-27 2009-07-16 Brother Ind Ltd Image forming apparatus
JP2010091866A (en) * 2008-10-09 2010-04-22 Canon Inc Image forming apparatus and intermediate transfer unit
JP2015210321A (en) * 2014-04-24 2015-11-24 富士ゼロックス株式会社 Image forming apparatus and box-body mounting structure

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000194248A (en) * 1998-12-28 2000-07-14 Canon Inc Process cartridge, electrifying unit and developing unit
JP2001154507A (en) * 1999-11-30 2001-06-08 Fuji Xerox Co Ltd Image forming device
JP2003316233A (en) * 2002-02-19 2003-11-07 Ricoh Co Ltd Image forming apparatus
US20050002690A1 (en) * 2003-07-03 2005-01-06 Ki-Ju Park Tandem color image forming device
JP2007304500A (en) * 2006-05-15 2007-11-22 Canon Inc Image forming apparatus
JP2008310292A (en) * 2007-05-15 2008-12-25 Canon Inc Image forming apparatus
JP2009157209A (en) * 2007-12-27 2009-07-16 Brother Ind Ltd Image forming apparatus
JP2010091866A (en) * 2008-10-09 2010-04-22 Canon Inc Image forming apparatus and intermediate transfer unit
JP2015210321A (en) * 2014-04-24 2015-11-24 富士ゼロックス株式会社 Image forming apparatus and box-body mounting structure

Also Published As

Publication number Publication date
JP2020148881A (en) 2020-09-17

Similar Documents

Publication Publication Date Title
KR100894955B1 (en) Electrophotographic color image forming apparatus
KR100910692B1 (en) Electrophotographic image forming apparatus, process cartridge and movable member for electrophotographic image forming apparatus
US7184689B2 (en) Developing cartridge having protective cover and image forming apparatus including the same
US9348308B2 (en) Process cartridge having force receiving portion and image forming apparatus including process cartridge
WO2020202589A1 (en) Image formation device
KR100753434B1 (en) Image forming apparatus
JP6555967B2 (en) Image forming apparatus
JP2024040277A (en) cartridge
JP2023171543A (en) Image forming apparatus
US7444103B2 (en) Image-forming device and developing unit used therein
WO2020183744A1 (en) Image forming apparatus
US20230213885A1 (en) Image forming apparatus
WO2020202588A1 (en) Image forming device
JP7571831B2 (en) Image forming device
JP2016118733A (en) Image forming apparatus
JP7230796B2 (en) image forming device
US9429896B2 (en) Cover movement mechanism, and image forming apparatus provided with the cover movement mechanism
JP7525017B2 (en) Image forming device
JP4798764B2 (en) Image forming apparatus
JP7516961B2 (en) Image forming device
JP6834499B2 (en) Fixing device and image forming device
JP4243620B2 (en) Image forming apparatus
KR101941554B1 (en) Image forming apparatus
JP5653124B2 (en) Color electrophotographic image forming apparatus
KR20080082796A (en) Image forming apparatus

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19918710

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19918710

Country of ref document: EP

Kind code of ref document: A1