WO2020066090A1 - Image formation device - Google Patents

Image formation device Download PDF

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Publication number
WO2020066090A1
WO2020066090A1 PCT/JP2019/016285 JP2019016285W WO2020066090A1 WO 2020066090 A1 WO2020066090 A1 WO 2020066090A1 JP 2019016285 W JP2019016285 W JP 2019016285W WO 2020066090 A1 WO2020066090 A1 WO 2020066090A1
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WO
WIPO (PCT)
Prior art keywords
cartridge
developing
roller
body housing
main body
Prior art date
Application number
PCT/JP2019/016285
Other languages
French (fr)
Japanese (ja)
Inventor
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 WO2020066090A1 publication Critical patent/WO2020066090A1/en

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    • 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 invention relates to an image forming apparatus including a drum cartridge and a developing cartridge which are detachable from a main body housing.
  • the developing cartridge When the drum cartridge and the developing cartridge are attached to the main body housing and the cover closes the opening of the main body housing, the developing cartridge is in a contact position where the developing roller contacts the photosensitive drum, and the developing roller is It can be moved between and away from the position.
  • the developing roller In the related art, in a state where the drum cartridge and the developing cartridge are attached to the main body housing and the cover closes the opening of the main body housing, when the developing cartridge moves from the separated position to the contact position, the developing roller There is no component for positioning the photosensitive drum with respect to the photosensitive drum, and an improvement in positioning accuracy is required.
  • an image forming apparatus is a drum cartridge having a main body housing and a photosensitive drum rotatable about a first axis extending in a first direction, wherein the main body is arranged in the first direction.
  • a drum cartridge detachable from the housing, a developing roller rotatable about a second axis extending in the first direction, a developing frame for storing a developer, and a roller rotatable about a third axis extending in the first direction
  • a developing cartridge detachably mounted on the main body housing in the first direction, and opening and closing an opening of the main body housing that allows the drum cartridge and the developing cartridge to pass therethrough.
  • a fourth cover extending in a second direction intersecting the first direction between an open position for opening the opening and a closed position for closing the opening; Comprising a cover movable, in a state in which the drum cartridge and the developing cartridge is mounted to the main body housing, and a intermediate transfer belt located above said drum cartridge and the developing cartridge about.
  • the developing cartridge In a state where the drum cartridge and the developing cartridge are mounted on the main body housing, when the cover is located at the open position, the developing cartridge is configured such that the developing roller and the roller are separated from the photosensitive drum. It is located at one separation position.
  • the developing roller is configured such that the developing roller and the roller are moved from the first separated position. It moves to the first contact position where it contacts the photosensitive drum.
  • the developing roller and the roller contact the photosensitive drum at the first contact position, the developing roller is more accurately positioned relative to the photosensitive drum even if the developing cartridge is removable in the first direction. can do.
  • the image forming apparatus may include a paper discharge unit located above the intermediate transfer belt.
  • the drum cartridge and the developing cartridge may be independently mountable on the main body housing.
  • the drum cartridge and the developing cartridge may be arranged in the second direction in a state where the drum cartridge and the developing cartridge are mounted on the main body housing.
  • the roller may be located above the developing roller when the developing cartridge is mounted on the main body casing.
  • the outer diameter of the roller may be smaller than the outer diameter of the developing roller.
  • the distance between the roller and the intermediate transfer belt when the developing cartridge is located at the first separation position is determined by the distance between the roller and the intermediate transfer belt when the developing cartridge is located at the first contact position. May be greater than the distance between
  • the image forming apparatus includes a pressing position for pressing the developing frame to press the developing roller and the roller toward the photosensitive drum, a non-pressing position for not pressing the developing frame of the developing cartridge, A pressing member that can move between the non-pressing position and the non-pressing position when the cover is located at the open position in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. And the cover may be moved from the non-pressed position to the pressed position when the cover is located at the closed position in a state where the drum cartridge and the developing cartridge are mounted on the main body housing.
  • the pressing member when the pressing member is located at the pressing position, the pressing member contacts the developing frame, and when the pressing member is located at the non-pressing position, the pressing member is connected to the developing frame. It may be separated.
  • the drum cartridge In a state where the drum cartridge is mounted on the main body housing, when the cover is located at the open position, the drum cartridge is moved to a second separation position where the photosensitive drum and the intermediate transfer belt are separated from each other.
  • the drum cartridge moves the photosensitive drum and the photosensitive drum from the second separated position. It may move to a second contact position where the intermediate transfer belt contacts.
  • the photosensitive drum can be brought into contact with or separated from the intermediate transfer belt simply by opening and closing the cover.
  • the developing roller in a developing cartridge that can be attached and detached in the first direction, the developing roller can be positioned more accurately with respect to the photosensitive drum.
  • FIG. 1 is a diagram illustrating a schematic configuration of a color printer according to an embodiment of the present invention. It is a perspective view showing the state where the cover of the main part case was opened. It is a perspective view showing the state where a drum cartridge was pulled out from a main part case.
  • FIG. 9 is a perspective view illustrating a state in which a developing cartridge is pulled out from a main body housing.
  • FIG. 7A is a cross-sectional view illustrating a state in which the drum cartridge is located at the second spaced position and the developing cartridge is located at the first spaced position.
  • FIG. FIG. 6B is a cross-sectional view illustrating a state where the drum cartridge is located, and FIG.
  • FIG. 7C is a cross-sectional view illustrating a state where the drum cartridge is located at the second contact position and the developing cartridge is located at the first contact position.
  • FIGS. 7A and 7B are diagrams illustrating a relationship between a first cover and each cartridge
  • FIGS. 7C and 7C are diagrams illustrating a relationship between a wall of a main body housing and each cartridge.
  • FIG. 4 is a perspective view illustrating a relationship between a first cover and each cartridge.
  • the color printer 1 includes a main body casing 2, a paper feeding unit 3, an image forming unit 4, and a paper discharging unit 21.
  • the paper supply unit 3 supplies the paper P to the image forming unit 4.
  • the image forming unit 4 forms an image on the sheet P.
  • the paper discharge unit 21 discharges the paper P.
  • the paper discharge unit 21 is located at the upper part of the main body housing 2.
  • the paper discharge unit 21 is located above an intermediate transfer belt 63 described later.
  • the paper discharge unit 21 includes the discharge roller 9 and a paper discharge surface.
  • the discharge roller 9 conveys the paper P toward the discharge surface.
  • the paper feed unit 3 is located at a lower portion 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 detachable 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 exposing device SU, a transfer unit 60, and a fixing unit 70.
  • Each drum cartridge 40 has a photosensitive drum 41, a drum frame F1, and a charger (not shown).
  • the photosensitive drum 41 is rotatable about a first axis X1 extending in a first direction.
  • the four drum cartridges 40 are arranged in a second direction orthogonal to the first direction and the vertical direction.
  • Each developing cartridge 50 has a developing roller 51, a roller 52, and a developing frame F2.
  • the developing frame F2 contains a developer.
  • 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.
  • the roller 52 is a different roller from the developing roller 51.
  • the roller 52 is located above the developing roller 51 when the developing cartridge 50 is mounted on the main body housing 2.
  • the roller 52 is rotatable about a third axis X3 extending in the first direction.
  • the outer diameter of the roller 52 is smaller than the outer diameter of the developing roller 51.
  • the exposure apparatus SU is located below each drum cartridge 40.
  • the exposure device SU emits a laser beam to each photosensitive drum 41.
  • the transfer unit 60 is located between the four photosensitive drums 41 and the paper discharge unit 21.
  • the transfer unit 60 includes a drive roller 61, a driven roller 62, an intermediate transfer belt 63, four primary transfer rollers 64, and a secondary transfer roller 65.
  • 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 when 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 on the intermediate transfer belt 63.
  • the fixing unit 70 includes a heating roller 71 and a pressure roller 72.
  • the pressure roller 72 is pressed by the heating roller 71.
  • the charger charges the surface of the photosensitive drum 41.
  • the exposure device SU exposes the surface of the photosensitive drum 41 to light.
  • an electrostatic latent image is formed on the photosensitive drum 41.
  • the developing roller 51 supplies a 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 main body housing 2 has a cover C.
  • the main housing 2 has an opening 22A.
  • the opening 22A is an opening for attaching / detaching each drum cartridge 40 and each developing cartridge 50.
  • the opening 22A allows the passage of the drum cartridge 40 and the developing cartridge 50.
  • the cover C is a member for opening and closing the opening 22A.
  • the cover C has a first cover C1 and a second cover C2.
  • the first cover C1 rotates around the lower end of the first cover C1.
  • the first cover C1 is movable between an open position for opening the opening 22A and a closed position for closing the opening 22A about a fourth axis X4 extending in a second direction intersecting the first direction.
  • the first cover C1 has a guide portion G.
  • the guide portion G has four convex portions G1, four first guide surfaces G11, and four second guide surfaces G21. Each convex portion G1 protrudes upward from each second guide surface G21.
  • the first guide surface G11 is a surface that guides the drum cartridge 40 when the covers C1 and C2 are open.
  • the first guide surface G11 supports the drum cartridge 40 from below.
  • the first guide surface G11 is located above the second guide surface G21. Specifically, the first guide surface G11 is the upper surface of the convex portion G1.
  • the second guide surfaces G21 are surfaces that guide the developing cartridge 50 when the first cover C1 and the second cover C2 are open. Each second guide surface G21 supports the developing cartridge 50 from below.
  • the second cover C2 rotates around the lower end of the second cover C2.
  • the second cover C2 covers the opening 22A and the first cover C1.
  • the first cover C1 may rotate in conjunction with the rotation of the second cover C2.
  • the first cover C1 and the second cover C2 may be separately rotatable.
  • the drum cartridge 40 and the developing cartridge 50 are arranged 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. As shown in FIGS. 3 and 4, the drum cartridge 40 and the developing cartridge 50 are independently detachable from the main housing 2 in the first direction. Each drum cartridge 40 has the same structure. Each developing cartridge 50 has the same structure.
  • the drum cartridge 40 has a first side wall 410 and a first boss BS1.
  • the first side wall 410 is provided on each side of the drum cartridge 40 in the first direction.
  • the two first side walls 410 each have a first boss BS1.
  • the first boss BS1 protrudes outward from the first side wall 410 in the first direction.
  • the first boss BS1 has a columnar shape.
  • the developing cartridge 50 has a second side wall 510 and a second boss BS2.
  • the second side walls 510 are provided one on each side of the developing cartridge 50 in the first direction.
  • the two second side walls 510 each have a second boss BS2.
  • the second boss BS2 projects outward from the second side wall 510 in the first direction.
  • the second boss BS2 has a columnar shape.
  • the main body housing 2 has a first guide surface G111, a second guide surface G121, a first convex portion R1, and a second convex portion R2.
  • the first guide surface G111 is a surface that guides the drum cartridge 40 inside the main body housing 2. Specifically, four first guide surfaces G111 are located below the four drum cartridges 40.
  • the four first guide surfaces G111 each have a first protrusion R1.
  • the first protrusion R1 protrudes upward from the first guide surface G111.
  • the drum cartridge 40 has a first concave portion CV1.
  • the first concave portion CV1 is a concave portion into which the first convex portion R1 enters.
  • Each of the first convex portion R1 and the first concave portion CV1 extends so as to be elongated in the first direction.
  • the drum cartridge 40 moves in the first direction with the first convex portion R1 entering the first concave portion CV1.
  • the drum cartridge 40 moves in a state where the first convex portion R1 enters the first concave portion CV1.
  • the second guide surface G121 is a surface for guiding the developing cartridge 50 inside the main body housing 2. Specifically, four second guide surfaces G121 are located below the four developing cartridges 50.
  • the four second guide surfaces G121 each have a second convex portion R2.
  • the second convex portion R2 protrudes upward from the second guide surface G121.
  • the developing cartridge 50 has a second concave portion CV2.
  • the second concave portion CV2 is a concave portion into which the second convex portion R2 enters.
  • the second convex portion R2 and the second concave portion CV2 each extend so as to be long in the first direction.
  • the drum cartridge 40 is movable between a second separated position shown in FIG. 5A and a second contact position shown in FIG. 5B.
  • the second contact position is a position where the photosensitive drum 41 contacts the intermediate transfer belt 63.
  • the second separation position is a position where the photosensitive drum 41 is separated from the intermediate transfer belt 63.
  • the main body housing 2 has a slide mechanism PM1.
  • the drum cartridge 40 can be moved between the second contact position and the second separation position by the slide mechanism PM1.
  • the slide mechanism PM1 includes a first arm PM11, a second arm PM12, and a plate PM13.
  • the first arm PM11 is located on one side of the drum cartridge 40 in the first direction.
  • the second arm PM12 is located on the other side of the drum cartridge 40 in the first direction.
  • Each arm PM11, PM12 is a long member.
  • the arm PM11 has one end and the other end.
  • the arm PM12 has one end and the other end.
  • One end of the arm PM11 and one end of the arm PM12 are respectively connected to the main housing 2, and the arm PM11 is rotatable about the one end of the arm PM11 with respect to the main housing 2.
  • the arm PM12 is also rotatable around the one end of the arm PM12 with respect to the main body housing 2.
  • the plate PM13 is a plate-shaped member that is long in the first direction.
  • the plate PM13 contacts the lower surface of the drum cartridge 40.
  • the plate PM13 has one end in the first direction and the other end.
  • One end of the plate PM13 is connected to the other end of the arm PM11, and the plate PM13 is rotatable around the one end of the plate PM13 with respect to the other end of the arm PM11.
  • the other end of the plate PM13 is connected to the other end of the arm PM12, and the plate PM13 is rotatable around the other end of the plate PM13 with respect to the other end of the arm PM12.
  • the first arm PM11 is fixed to the first cover C1. Thereby, the first arm PM11 is rotatable with respect to the main body housing 2 together with the first cover C1.
  • the arm PM11 moves to the first position together with the first cover C1. In a state where the arm PM11 is located at the first position, the arm PM11 is along the first direction. 8A, when the first cover C1 is opened, the arm PM12 moves to the second position together with the first cover C1. In a state where the arm PM12 is located at the second position, the arm PM12 is along the first direction. At this time, the plate PM13 is located below the first guide surface G111 of the main body housing 2. On the other hand, when the first cover C1 moves from the opened state to the closed state, the first cover C1 moves to the state shown in FIG. 8C via the state shown in FIG. 8B. I do. As shown in FIGS.
  • the arm PM11 moves from the first position to the third position. Then, as shown in FIG. 8C, when the first cover C1 is closed, the arm PM11 is at the third position. In a state where the arm PM11 is located at the third position, the arm PM11 extends along the up-down direction. Further, as shown in FIGS. 8A to 8C, in the process of closing the first cover C1, the arm PM12 moves from the second position to the fourth position. Then, as shown in FIG. 8C, when the first cover C1 is closed, the arm PM12 is at the fourth position. When the arm PM12 is located at the fourth position, the arm PM12 extends along the up-down direction. At this time, the plate PM13 is located above the first guide surface G111 of the main body housing 2.
  • the plate PM13 moves upward by pushing the arm PM11 from the first position to the third position, and pushes up the drum cartridge 40. Therefore, the drum cartridge 40 can be moved between the second contact position and the second separation position in conjunction with opening and closing of the first cover C1.
  • the plate PM13 moves upward and pushes up the drum cartridge 40. Therefore, the drum cartridge 40 can be moved between the second contact position and the second separation position in conjunction with opening and closing of the first cover C1. For this reason, it is possible to move the drum cartridge 40 between the second contact position and the second separation position in conjunction with the opening and closing of the first cover C1.
  • the developing cartridge 50 is movable between a first contact position shown in FIG. 5 (c) and a first separated position shown in FIG. 5 (b).
  • the first contact position is a position where the developing roller 51 and the roller 52 contact the photosensitive drum 41.
  • the first separation position is a position where the developing roller 51 and the roller 52 are separated from the photosensitive drum 41.
  • the developing cartridge 50 can be moved between the first contact position and the first separation position.
  • the distance between the roller 52 and the intermediate transfer belt 63 when the developing cartridge 50 is located at the first separation position is the distance between the roller 52 and the intermediate transfer belt 63 when the developing cartridge 50 is located at the first contact position. Greater than.
  • the main body housing 2 has a pressing member PM2.
  • the pressing member PM2 is movable between a pressing position indicated by a solid line in the drawing and a non-pressing position indicated by a broken line in the drawing.
  • the pressing position is a position at which the developing frame F2 is pressed to press the developing roller 51 and the roller 52 toward the photosensitive drum 41.
  • the non-pressing position is a position when the developing frame F2 of the developing cartridge 50 is not pressed.
  • the pressing member PM2 contacts the developing frame F2.
  • the pressing member PM2 is located at the non-pressing position, the pressing member PM2 is separated from the developing frame F2.
  • the pressing member PM2 is located at the non-pressing position when the first cover C1 is located at the open position when the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2.
  • the pressing member PM2 moves from the non-pressing position to the pressing position when the first cover C1 is in the closed position in a state where the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2.
  • the pressing member PM2 can be appropriately operated by a control device (not shown) according to a difference in printing control such as color printing and monochrome printing. Further, the pressing member PM2 may be operated in conjunction with opening and closing of the first cover C1.
  • the developing cartridge 50 can be moved between the first contact position and the first separation position by the pressing member PM2. Specifically, when the pressing member PM2 is located at the pressing position, the developing cartridge 50 is located at the first contact position. When the pressing member PM2 is located at the non-pressing position, the developing cartridge 50 is located at the first separated position. Therefore, when the first cover C1 is located at the open position in a state where the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2, the pressing member PM2 is located at the non-pressing position. Are located at the first separated position. When the first cover C1 is located at the closed position in a state where the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2, the pressing member PM2 moves from the non-pressing position to the pressing position. The developing cartridge 50 moves from the first separation position to the first contact position.
  • the first cover C1 has four first grooves GR1 and four second grooves GR2.
  • the first groove GR1 is a groove into which the first boss BS1 of the drum cartridge 40 enters.
  • the first groove GR1 is formed in a long hole shape that is long in the vertical direction. Specifically, the first groove GR1 is formed on the first guide surface G11 shown in FIG.
  • the drum cartridge 40 moves between the second contact position and the second separation position when the first boss BS1 moves along the first groove GR1. It is supposed to.
  • the second groove GR2 is a groove into which the second boss BS2 of the developing cartridge 50 enters.
  • the second groove GR2 is formed in a vertically long slot shape.
  • the second groove GR2 is located below the first groove GR1.
  • the developing cartridge 50 moves between the first contact position and the first separation position as the second boss BS2 moves along the second groove GR2.
  • the pressing member PM2 presses the lower portion of the developing cartridge 50 obliquely upward. Then, as shown in FIGS. 6A and 6B, the developing cartridge 50 moves upward while rotating about the second boss BS2. Thereby, the developing cartridge 50 can be favorably moved between the first contact position and the first separation position.
  • the main housing 2 has a wall 23.
  • the wall 23 is a wall that sandwiches the drum cartridge 40 and the developing cartridge 50 with the cover C.
  • the wall 23 has four first grooves GR1 and four second grooves GR2.
  • the grooves GR1 and GR2 formed on the wall 23 have the same structure as the grooves GR1 and GR2 formed on the first cover C1 described above.
  • the first bosses BS1 on both sides in the first direction of the drum cartridge 40 are guided by the first groove GR1 of the first cover C1 and the first groove GR1 of the wall 23, respectively.
  • the second bosses BS2 on both sides in the first direction of the developing cartridge 50 are guided by the second groove GR2 of the first cover C1 and the second groove GR2 of the wall 23, respectively.
  • FIG. 5A when the drum cartridge 40 is mounted on the main body housing 2 in the first direction, the user needs to set the first convex portion R1 of the main body housing 2 to the first concave portion of the drum cartridge 40.
  • the drum cartridge 40 is placed on the first guide surface G111 so as to enter the CV1. Thereafter, the user slides the drum cartridge 40 in the first direction along the first guide surface G111.
  • the user when the developing cartridge 50 is mounted on the main body housing 2 in the first direction, the user needs to make the second convex portion R2 of the main body housing 2 the second concave portion of the developing cartridge 50.
  • the developer cartridge 50 is placed on the second guide surface G121 so as to enter the CV2. Thereafter, the user slides the developing cartridge 50 in the first direction along the second guide surface G121.
  • each drum cartridge 40 is moved to the second position. It moves from the separated position to the second contact position.
  • FIG. 8C when the first cover C1 is closed, the movement of each drum cartridge 40 to the second contact position is completed.
  • the first boss BS1 of the drum cartridge 40 enters the first groove GR1 of the first cover C1.
  • the second boss BS2 of the developing cartridge 50 enters the second groove GR2 of the first cover C1.
  • the mounting of the cartridges 40 and 50 to the main housing 2 is completed.
  • the operation of removing the cartridges 40 and 50 from the main body housing 2 in the first direction may be performed by reversing the above-described operation.
  • the developing roller 51 detachable in the first direction only includes the roller 52 different from the developing roller 51, the developing roller 51 can be positioned with respect to the photosensitive drum 41.
  • the developing roller 51 can be positioned with respect to the photosensitive drum 41.
  • the slide mechanism PM1 operates in conjunction with the opening and closing of the first cover C1, the photosensitive drum 41 can be brought into contact with and separated from the intermediate transfer belt 63 only by opening and closing the first cover C1.
  • the present invention is not limited to the above embodiment, but can be used in various forms as exemplified below.
  • members having substantially the same structure as those of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.
  • the drum cartridge 40 has the first boss BS1 and the main body housing 2 has the first groove GR1, but the present invention is not limited to this.
  • the drum cartridge may have a first groove, and the main body housing may have a first boss.
  • the developing cartridge may have the second groove, and the main body housing may have the second boss.
  • the drum cartridge 40 has the first concave portion CV1
  • the main body housing 2 has the first convex portion R1
  • the present invention is not limited to this.
  • the drum cartridge may have a first convex portion
  • the main body housing may have a first concave portion
  • the developing cartridge may have the second convex portion
  • the main body housing may have the second concave portion.
  • the present invention is applied to the color printer 1, but the present invention is not limited to this, and the present invention may be applied to other image forming apparatuses, for example, a monochrome printer, a copier, a multifunction peripheral, and the like. Good.

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

Abstract

The purpose of the present invention is to accurately position a development roller with respect to a photoconductor drum when a development cartridge moves from a separation position to a contact position in a state where a drum cartridge and the development cartridge are attached to a body housing, and a cover is closed. This image formation device is provided with: a body housing 2; a drum cartridge 40 that has a photoconductor drum 41 rotatable about a first axis extending in a first direction, and is attachable to and detachable from the body housing 2 in the first direction; a development cartridge 50 that has a development roller 51 and a roller 52 and is attachable to and detachable from the body housing 2 in the first direction; and a cover that opens and closes an opening of the body housing 2. When the cover is opened, the development cartridge 50 is located at a first separation position at which the development roller 51 and the roller 52 are separated from the photoconductor drum 41. When the cover is closed, the development cartridge 50 moves from the first separation position to a first contact position at which the development roller 51 and the roller 52 are brought into contact with the photoconductor drum 41.

Description

画像形成装置Image forming device
　本発明は、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 invention relates to an image forming apparatus including a drum cartridge and a developing cartridge which are detachable from a 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感光ドラムの軸方向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、本体筐体は、ドラムカートリッジおよび現像カートリッジが挿入されることを許容する開口を開閉するカバーを有している。また、ドラムカートリッジおよび現像カートリッジは、本体筐体に個別に着脱可能となっている。 Conventionally, there has been known an image forming apparatus in which a drum cartridge and a developing cartridge can be attached to and detached from a main body housing in the axial direction of a photosensitive drum (see Patent Document 1). In this technique, the main body housing has a cover that opens and closes an opening that allows the drum cartridge and the developing cartridge to be inserted. The drum cartridge and the developing cartridge are individually detachable from the main body housing.
　ドラムカートリッジおよび現像カートリッジが本体筐体に装着され、かつ、カバーが本体筐体の開口を閉じている状態において、現像カートリッジは、現像ローラが感光ドラムに接触する接触位置と、現像ローラが感光ドラムから離間した離間位置との間で移動可能となっている。 When the drum cartridge and the developing cartridge are attached to the main body housing and the cover closes the opening of the main body housing, the developing cartridge is in a contact position where the developing roller contacts the photosensitive drum, and the developing roller is It can be moved between and away from the position.
特開２０１７－１７３８０５号公報JP-A-2017-173805
　従来技術では、ドラムカートリッジおよび現像カートリッジが本体筐体に装着され、かつ、カバーが本体筐体の開口を閉じている状態において、現像カートリッジが、離間位置から接触位置に移動した場合に、現像ローラを、感光ドラムに対して、位置決めする部品が無く、位置決め精度の向上が求められる。 In the related art, in a state where the drum cartridge and the developing cartridge are attached to the main body housing and the cover closes the opening of the main body housing, when the developing cartridge moves from the separated position to the contact position, the developing roller There is no component for positioning the photosensitive drum with respect to the photosensitive drum, and an improvement in positioning accuracy is required.
　そこで、ドラムカートリッジおよび現像カートリッジが本体筐体に装着され、かつ、カバーが本体筐体の開口を閉じている状態において、現像カートリッジが、離間位置から接触位置に移動した場合に、現像ローラを、感光ドラムに対して、より精度良く位置決めすることを目的とする。 Therefore, when the drum cartridge and the developing cartridge are attached to the main body housing and the cover closes the opening of the main body housing, and the developing cartridge moves from the separated position to the contact position, the developing roller is moved. It is an object of the present invention to more accurately position a photosensitive drum.
　前記課題を解決するため、本発明に係る画像形成装置は、本体筐体と、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と、現像剤を収容する現像フレームと、前記第１方向に延びる第３軸について回転可能なローラと、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通過することを許容する前記本体筐体の開口を開閉するカバーであって、前記開口を開放する開放位置と前記開口を閉鎖する閉鎖位置との間を前記第１方向と交差する第２方向に延びる第４軸について移動可能なカバーと、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よりも上方に位置する中間転写ベルトと、を備える。
　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、前記カバーが前記開放位置に位置する場合に、前記現像カートリッジは、前記現像ローラおよび前記ローラが前記感光ドラムから離間する第１離間位置に位置する。
　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、前記カバーが前記閉鎖位置に位置する場合に、前記現像カートリッジは、前記第１離間位置から前記現像ローラおよび前記ローラが前記感光ドラムと接触する第１接触位置へ移動する。 In order to solve the above-mentioned problem, an image forming apparatus according to the present invention is a drum cartridge having a main body housing and a photosensitive drum rotatable about a first axis extending in a first direction, wherein the main body is arranged in the first direction. A drum cartridge detachable from the housing, a developing roller rotatable about a second axis extending in the first direction, a developing frame for storing a developer, and a roller rotatable about a third axis extending in the first direction A developing cartridge detachably mounted on the main body housing in the first direction, and opening and closing an opening of the main body housing that allows the drum cartridge and the developing cartridge to pass therethrough. A fourth cover extending in a second direction intersecting the first direction between an open position for opening the opening and a closed position for closing the opening; Comprising a cover movable, in a state in which the drum cartridge and the developing cartridge is mounted to the main body housing, and a intermediate transfer belt located above said drum cartridge and the developing cartridge about.
In a state where the drum cartridge and the developing cartridge are mounted on the main body housing, when the cover is located at the open position, the developing cartridge is configured such that the developing roller and the roller are separated from the photosensitive drum. It is located at one separation position.
When the cover is located at the closed position in a state where the drum cartridge and the developing cartridge are mounted on the main body housing, the developing roller is configured such that the developing roller and the roller are moved from the first separated position. It moves to the first contact position where it contacts the photosensitive drum.
　これによれば、第１接触位置において、現像ローラおよびローラが感光ドラムと接触するので、第１方向に着脱可能な現像カートリッジであっても、現像ローラを感光ドラムに対して、より精度良く位置決めすることができる。 According to this, since the developing roller and the roller contact the photosensitive drum at the first contact position, the developing roller is more accurately positioned relative to the photosensitive drum even if the developing cartridge is removable in the first direction. can do.
　また、前記画像形成装置は、前記中間転写ベルトの上方に位置する排紙部を備えていてもよい。 The image forming apparatus may include a paper discharge unit located above the intermediate transfer belt.
　また、前記ドラムカートリッジと前記現像カートリッジは、それぞれ独立して、前記本体筐体に装着可能であってもよい。 The drum cartridge and the developing cartridge may be independently mountable on the main body housing.
　また、前記ドラムカートリッジおよび前記現像カートリッジは、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で、前記第２方向に並んでいてもよい。 The drum cartridge and the developing cartridge may be arranged in the second direction in a state where the drum cartridge and the developing cartridge are mounted on the main body housing.
　また、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、前記ローラは、前記現像ローラの上方に位置していてもよい。 The roller may be located above the developing roller when the developing cartridge is mounted on the main body casing.
　また、前記ローラの外径は、前記現像ローラの外径よりも小さくてもよい。 The outer diameter of the roller may be smaller than the outer diameter of the developing roller.
　また、前記現像カートリッジが前記第１離間位置に位置する場合の前記ローラと前記中間転写ベルトの間の距離は、前記現像カートリッジが前記第１接触位置に位置する場合の前記ローラと前記中間転写ベルトの間の距離よりも大きくてもよい。 The distance between the roller and the intermediate transfer belt when the developing cartridge is located at the first separation position is determined by the distance between the roller and the intermediate transfer belt when the developing cartridge is located at the first contact position. May be greater than the distance between
　また、前記画像形成装置は、前記現像ローラおよび前記ローラを前記感光ドラムに向けて押圧するために前記現像フレームを押圧する押圧位置と、前記現像カートリッジの前記現像フレームを押圧しない非押圧位置と、の間を移動可能な押圧部材を備え、前記押圧部材は、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、前記カバーが開放位置に位置する場合に、前記非押圧位置に位置し、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、前記カバーが前記閉鎖位置に位置する場合に、前記非押圧位置から前記押圧位置に移動してもよい。 Further, the image forming apparatus includes a pressing position for pressing the developing frame to press the developing roller and the roller toward the photosensitive drum, a non-pressing position for not pressing the developing frame of the developing cartridge, A pressing member that can move between the non-pressing position and the non-pressing position when the cover is located at the open position in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. And the cover may be moved from the non-pressed position to the pressed position when the cover is located at the closed position in a state where the drum cartridge and the developing cartridge are mounted on the main body housing.
　また、前記押圧部材が前記押圧位置に位置する場合に、前記押圧部材は、前記現像フレームと接触し、前記押圧部材が前記非押圧位置に位置する場合に、前記押圧部材は、前記現像フレームと離間してもよい。 Further, when the pressing member is located at the pressing position, the pressing member contacts the developing frame, and when the pressing member is located at the non-pressing position, the pressing member is connected to the developing frame. It may be separated.
　また、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、前記カバーが前記開放位置に位置する場合に、前記ドラムカートリッジは、前記感光ドラムと前記中間転写ベルトが離間する第２離間位置に位置し、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、前記カバーが前記開放位置から前記閉鎖位置に移動する場合に、前記ドラムカートリッジは、前記第２離間位置から前記感光ドラムと前記中間転写ベルトが接触する第２接触位置に移動してもよい。 In a state where the drum cartridge is mounted on the main body housing, when the cover is located at the open position, the drum cartridge is moved to a second separation position where the photosensitive drum and the intermediate transfer belt are separated from each other. When the cover is moved from the open position to the closed position in a state where the drum cartridge is mounted on the main body housing, the drum cartridge moves the photosensitive drum and the photosensitive drum from the second separated position. It may move to a second contact position where the intermediate transfer belt contacts.
　これによれば、カバーを開閉するだけで、感光ドラムを中間転写ベルトに対して接触・離間させることができる。 According to this, the photosensitive drum can be brought into contact with or separated from the intermediate transfer belt simply by opening and closing the cover.
　本発明によれば、第１方向に着脱可能な現像カートリッジにおいて、現像ローラを感光ドラムに対して、より精度良く位置決めすることができる。 According to the present invention, in a developing cartridge that can be attached and detached in the first direction, the developing roller can be positioned more accurately with respect to the photosensitive drum.
本発明の一実施形態に係るカラープリンタの概略構成を示す図である。FIG. 1 is a diagram illustrating a schematic configuration of a color printer according to an embodiment of the present invention. 本体筐体のカバーを開けた状態を示す斜視図である。It is a perspective view showing the state where the cover of the main part case was opened. ドラムカートリッジを本体筐体から引き出した状態を示す斜視図である。It is a perspective view showing the state where a drum cartridge was pulled out from a main part case. 現像カートリッジを本体筐体から引き出した状態を示す斜視図である。FIG. 9 is a perspective view illustrating a state in which a developing cartridge is pulled out from a main body housing. ドラムカートリッジが第２離間位置に位置し、現像カートリッジが第１離間位置に位置する状態を示す断面図（ａ）と、ドラムカートリッジが第２接触位置に位置し、現像カートリッジが第１離間位置に位置する状態を示す断面図（ｂ）と、ドラムカートリッジが第２接触位置に位置し、現像カートリッジが第１接触位置に位置する状態を示す断面図（ｃ）である。FIG. 7A is a cross-sectional view illustrating a state in which the drum cartridge is located at the second spaced position and the developing cartridge is located at the first spaced position. FIG. FIG. 6B is a cross-sectional view illustrating a state where the drum cartridge is located, and FIG. 7C is a cross-sectional view illustrating a state where the drum cartridge is located at the second contact position and the developing cartridge is located at the first contact position. 第１カバーと各カートリッジの関係を示す図（ａ），（ｂ）と、本体筐体の壁と各カートリッジの関係を示す図（ｃ）である。FIGS. 7A and 7B are diagrams illustrating a relationship between a first cover and each cartridge, and FIGS. 7C and 7C are diagrams illustrating a relationship between a wall of a main body housing and each cartridge. 第１カバーと各カートリッジの関係を示す斜視図である。FIG. 4 is a perspective view illustrating a relationship between a first cover and each cartridge. 第１カバーおよび第２カバーを開放した状態を示す断面図（ａ）と、第１カバーと開位置から閉位置に回動させている状態を示す断面図（ｂ）と、第１カバーを閉じた状態を示す断面図（ｃ）である。A cross-sectional view showing a state where the first cover and the second cover are opened, a cross-sectional view showing a state where the first cover and the cover are rotated from an open position to a closed position, and a state where the first cover is closed. It is sectional drawing (c) which shows the state which carried out.
　次に、本発明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 invention will be described in detail with reference to the drawings as appropriate. In the following description, first, the overall configuration of a color printer 1 as an example of an 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２１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２１は、用紙Ｐを排出する。 As shown in FIG. 1, the color printer 1 includes a main body casing 2, a paper feeding unit 3, an image forming unit 4, and a paper discharging unit 21. The paper supply unit 3 supplies the paper P to the image forming unit 4. The image forming unit 4 forms an image on the sheet P. The paper discharge unit 21 discharges the paper P.
　排紙部２１は、本体筐体２の上部に位置する。排紙部２１は、後述する中間転写ベルト６３の上方に位置する。排紙部２１は、排出ローラ９と、排紙面と、を備える。排出ローラ９は、用紙Ｐを排紙面に向けて搬送する。 紙 The paper discharge unit 21 is located at the upper part of the main body housing 2. The paper discharge unit 21 is located above an intermediate transfer belt 63 described later. The paper discharge unit 21 includes the discharge roller 9 and a paper discharge surface. The discharge roller 9 conveys the paper P toward the discharge surface.
　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。 (4) The paper feed unit 3 is located at a lower portion 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 detachable 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 exposing device 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、ドラムフレームＦ１と、図示せぬ帯電器と、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、第１方向および上下方向に直交する第２方向に並ぶ。 Each drum cartridge 40 has a photosensitive drum 41, a drum frame F1, and a charger (not shown). The photosensitive drum 41 is rotatable about a first axis X1 extending in a first direction. The four drum cartridges 40 are arranged in a second direction orthogonal to the first direction and the vertical direction.
　各現像カートリッジ５０は、現像ローラ５１と、ローラ５２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、第２方向に並ぶ。ローラ５２は、現像ローラ５１とは別のローラである。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、ローラ５２は、現像ローラ５１の上方に位置する。ローラ５２は、第１方向に延びる第３軸Ｘ３について回転可能である。ローラ５２の外径は、現像ローラ５１の外径よりも小さい。 Each developing cartridge 50 has a developing roller 51, a roller 52, and a developing frame F2. The developing frame F2 contains a developer. 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. The roller 52 is a different roller from the developing roller 51. The roller 52 is located above the developing roller 51 when the developing cartridge 50 is mounted on the main body housing 2. The roller 52 is rotatable about a third axis X3 extending in the first direction. The outer diameter of the roller 52 is smaller than the outer diameter of the developing roller 51.
　露光装置ＳＵは、各ドラムカートリッジ４０の下に位置する。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 device SU emits a laser beam to each photosensitive drum 41.
　転写ユニット６０は、４つの感光ドラム４１と排紙部２１との間に位置する。転写ユニット６０は、駆動ローラ６１と、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。 The transfer unit 60 is located between the four photosensitive drums 41 and the paper discharge unit 21. The transfer unit 60 includes a drive roller 61, a driven roller 62, an intermediate transfer belt 63, four primary transfer rollers 64, and a secondary transfer roller 65.
　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よりも上方に位置する。 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 when 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。 (5) 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。 (4) 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 on the intermediate transfer belt 63. The fixing unit 70 includes a heating roller 71 and a pressure roller 72. The pressure roller 72 is pressed by the heating roller 71.
　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。 First, the charger charges the surface of the photosensitive drum 41. After that, the exposure device SU exposes the surface of the photosensitive drum 41 to light. Thus, 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 a 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によって排紙部２１に排出される。 (4) 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. Thereafter, the developer image on the paper P is fixed by the fixing unit 70. Next, the paper P is discharged to the paper discharge unit 21 by the discharge roller 9.
　図２に示すように、本体筐体２は、カバーＣを有する。本体筐体２は、開口２２Ａを有する。開口２２Ａは、各ドラムカートリッジ４０および各現像カートリッジ５０を着脱するための開口である。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が通過することを許容する。 本体 As shown in FIG. 2, the main body housing 2 has a cover C. The main housing 2 has an opening 22A. The opening 22A is an opening for attaching / detaching each drum cartridge 40 and each developing cartridge 50. The opening 22A allows the passage of the drum cartridge 40 and the developing cartridge 50.
　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、第１カバーＣ１と、第２カバーＣ２と、を有する。 The cover C is a member for opening and closing the opening 22A. The cover C has a first cover C1 and a second cover C2.
　第１カバーＣ１は、第１カバーＣ１の下端を中心に回動する。第１カバーＣ１は、開口２２Ａを開放する開放位置と開口２２Ａを閉鎖する閉鎖位置との間を、第１方向と交差する第２方向に延びる第４軸Ｘ４について移動可能である。第１カバーＣ１は、ガイド部Ｇを有する。 The first cover C1 rotates around the lower end of the first cover C1. The first cover C1 is movable between an open position for opening the opening 22A and a closed position for closing the opening 22A about a fourth axis X4 extending in a second direction intersecting the first direction. The first cover C1 has a guide portion G.
　ガイド部Ｇは、４つの凸部Ｇ１と、４つの第１ガイド面Ｇ１１と、４つの第２ガイド面Ｇ２１と、を有する。各凸部Ｇ１は、各第２ガイド面Ｇ２１から上に突出する。 The guide portion G has four convex portions G1, four first guide surfaces G11, and four second guide surfaces G21. Each convex portion G1 protrudes upward from each second guide surface G21.
　第１ガイド面Ｇ１１は、各カバーＣ１，Ｃ２が開いた状態において、ドラムカートリッジ４０をガイドする面である。第１ガイド面Ｇ１１は、ドラムカートリッジ４０を下から支持する。第１ガイド面Ｇ１１は、第２ガイド面Ｇ２１よりも上に位置する。詳しくは、第１ガイド面Ｇ１１は、凸部Ｇ１の上面である。 The first guide surface G11 is a surface that guides the drum cartridge 40 when the covers C1 and C2 are open. The first guide surface G11 supports the drum cartridge 40 from below. The first guide surface G11 is located above the second guide surface G21. Specifically, the first guide surface G11 is the upper surface of the convex portion G1.
　各第２ガイド面Ｇ２１は、第１カバーＣ１および第２カバーＣ２を開いた状態において、現像カートリッジ５０をガイドする面である。各第２ガイド面Ｇ２１は、現像カートリッジ５０を下から支持する。 The second guide surfaces G21 are surfaces that guide the developing cartridge 50 when the first cover C1 and the second cover C2 are open. Each second guide surface G21 supports the developing cartridge 50 from below.
　第２カバーＣ２は、第２カバーＣ２の下端を中心に回動する。第２カバーＣ２は、開口２２Ａおよび第１カバーＣ１を覆う。なお、第１カバーＣ１は、第２カバーＣ２の回動に連動して回動してもよい。また、第１カバーＣ１と第２カバーＣ２が、それぞれ別々に回動可能となっていてもよい。 The second cover C2 rotates around the lower end of the second cover C2. The second cover C2 covers the opening 22A and the first cover C1. Note that the first cover C1 may rotate in conjunction with the rotation of the second cover C2. Further, the first cover C1 and the second cover C2 may be separately rotatable.
　ドラムカートリッジ４０および現像カートリッジ５０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に装着された状態で、第２方向に並んでいる。そして、図３および図４に示すように、ドラムカートリッジ４０および現像カートリッジ５０は、それぞれ独立して、本体筐体２に対して第１方向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。各現像カートリッジ５０は、同じ構造となっている。 The drum cartridge 40 and the developing cartridge 50 are arranged 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. As shown in FIGS. 3 and 4, the drum cartridge 40 and the developing cartridge 50 are independently detachable from the main housing 2 in the first direction. Each drum cartridge 40 has the same structure. Each developing cartridge 50 has the same structure.
　図３に示すように、ドラムカートリッジ４０は、第１側壁４１０と、第１ボスＢＳ１と、を有する。第１側壁４１０は、ドラムカートリッジ４０の第１方向の両側に１つずつ設けられている。２つの第１側壁４１０は、それぞれ第１ボスＢＳ１を有する。 ド ラ ム As shown in FIG. 3, the drum cartridge 40 has a first side wall 410 and a first boss BS1. The first side wall 410 is provided on each side of the drum cartridge 40 in the first direction. The two first side walls 410 each have a first boss BS1.
　第１ボスＢＳ１は、第１側壁４１０から第１方向外側に突出する。第１ボスＢＳ１は、円柱状である。 The first boss BS1 protrudes outward from the first side wall 410 in the first direction. The first boss BS1 has a columnar shape.
　図４に示すように、現像カートリッジ５０は、第２側壁５１０と、第２ボスＢＳ２と、を有する。第２側壁５１０は、現像カートリッジ５０の第１方向の両側に１つずつ設けられている。２つの第２側壁５１０は、それぞれ第２ボスＢＳ２を有する。 現 像 As shown in FIG. 4, the developing cartridge 50 has a second side wall 510 and a second boss BS2. The second side walls 510 are provided one on each side of the developing cartridge 50 in the first direction. The two second side walls 510 each have a second boss BS2.
　第２ボスＢＳ２は、第２側壁５１０から第１方向外側に突出する。第２ボスＢＳ２は、円柱状である。 ２The second boss BS2 projects outward from the second side wall 510 in the first direction. The second boss BS2 has a columnar shape.
　図５（ａ）に示すように、本体筐体２は、第１ガイド面Ｇ１１１と、第２ガイド面Ｇ１２１と、第１凸部Ｒ１と、第２凸部Ｒ２と、を有する。第１ガイド面Ｇ１１１は、本体筐体２の内部において、ドラムカートリッジ４０をガイドする面である。詳しくは、４つのドラムカートリッジ４０の下に、４つの第１ガイド面Ｇ１１１が位置する。 As shown in FIG. 5A, the main body housing 2 has a first guide surface G111, a second guide surface G121, a first convex portion R1, and a second convex portion R2. The first guide surface G111 is a surface that guides the drum cartridge 40 inside the main body housing 2. Specifically, four first guide surfaces G111 are located below the four drum cartridges 40.
　４つの第１ガイド面Ｇ１１１は、それぞれ、第１凸部Ｒ１を有する。第１凸部Ｒ１は、第１ガイド面Ｇ１１１から上に突出する。ドラムカートリッジ４０は、第１凹部ＣＶ１を有する。第１凹部ＣＶ１は、第１凸部Ｒ１が入る凹部である。第１凸部Ｒ１および第１凹部ＣＶ１は、それぞれ、第１方向に長尺となるように延びている。これにより、ドラムカートリッジ４０を本体筐体２に第１方向に装着するときに、ドラムカートリッジ４０は、第１凸部Ｒ１が第１凹部ＣＶ１に入った状態で、第１方向に移動する。なお、ドラムカートリッジ４０を本体筐体２から第１方向に引き出すときも同様に、ドラムカートリッジ４０は、第１凸部Ｒ１が第１凹部ＣＶ１に入った状態で移動する。 The four first guide surfaces G111 each have a first protrusion R1. The first protrusion R1 protrudes upward from the first guide surface G111. The drum cartridge 40 has a first concave portion CV1. The first concave portion CV1 is a concave portion into which the first convex portion R1 enters. Each of the first convex portion R1 and the first concave portion CV1 extends so as to be elongated in the first direction. Thus, when the drum cartridge 40 is mounted on the main body housing 2 in the first direction, the drum cartridge 40 moves in the first direction with the first convex portion R1 entering the first concave portion CV1. Note that, similarly, when the drum cartridge 40 is pulled out from the main body housing 2 in the first direction, the drum cartridge 40 moves in a state where the first convex portion R1 enters the first concave portion CV1.
　第２ガイド面Ｇ１２１は、本体筐体２の内部において、現像カートリッジ５０をガイドする面である。詳しくは、４つの現像カートリッジ５０の下に、４つの第２ガイド面Ｇ１２１が位置する。 The second guide surface G121 is a surface for guiding the developing cartridge 50 inside the main body housing 2. Specifically, four second guide surfaces G121 are located below the four developing cartridges 50.
　４つの第２ガイド面Ｇ１２１は、それぞれ、第２凸部Ｒ２を有する。第２凸部Ｒ２は、第２ガイド面Ｇ１２１から上に突出する。現像カートリッジ５０は、第２凹部ＣＶ２を有する。第２凹部ＣＶ２は、第２凸部Ｒ２が入る凹部である。第２凸部Ｒ２および第２凹部ＣＶ２は、それぞれ、第１方向に長尺となるように延びている。これにより、現像カートリッジ５０を本体筐体２に第１方向に装着するときに、現像カートリッジ５０は、第２凸部Ｒ２が第２凹部ＣＶ２に入った状態で、第１方向に移動する。なお、現像カートリッジ５０を本体筐体２から第１方向に引き出すときも同様に、現像カートリッジ５０は、第２凸部Ｒ２が第２凹部ＣＶ２に入った状態で移動する。 The four second guide surfaces G121 each have a second convex portion R2. The second convex portion R2 protrudes upward from the second guide surface G121. The developing cartridge 50 has a second concave portion CV2. The second concave portion CV2 is a concave portion into which the second convex portion R2 enters. The second convex portion R2 and the second concave portion CV2 each extend so as to be long in the first direction. Thus, when the developing cartridge 50 is mounted on the main body housing 2 in the first direction, the developing cartridge 50 moves in the first direction with the second convex portion R2 entering the second concave portion CV2. Similarly, when the developing cartridge 50 is pulled out from the main body housing 2 in the first direction, the developing cartridge 50 moves in a state where the second convex portion R2 enters the second concave portion CV2.
　ドラムカートリッジ４０は、図５（ａ）に示す第２離間位置と、図５（ｂ）に示す第２接触位置との間で移動可能である。第２接触位置は、感光ドラム４１が中間転写ベルト６３に接触する位置である。第２離間位置は、感光ドラム４１が中間転写ベルト６３から離間する位置である。ドラムカートリッジ４０が第２接触位置に位置する状態およびドラムカートリッジ４０が第２離間位置に位置する状態のいずれの状態でも、第１凸部Ｒ１は、第１凹部ＣＶ１に入っている。 The drum cartridge 40 is movable between a second separated position shown in FIG. 5A and a second contact position shown in FIG. 5B. The second contact position is a position where the photosensitive drum 41 contacts the intermediate transfer belt 63. The second separation position is a position where the photosensitive drum 41 is separated from the intermediate transfer belt 63. In both the state where the drum cartridge 40 is located at the second contact position and the state where the drum cartridge 40 is located at the second separation position, the first convex portion R1 is in the first concave portion CV1.
　本体筐体２は、スライド機構ＰＭ１を有する。ドラムカートリッジ４０は、スライド機構ＰＭ１によって、第２接触位置と第２離間位置との間を移動可能となっている。 The main body housing 2 has a slide mechanism PM1. The drum cartridge 40 can be moved between the second contact position and the second separation position by the slide mechanism PM1.
　図７に示すように、スライド機構ＰＭ１は、第１アームＰＭ１１と、第２アームＰＭ１２と、板ＰＭ１３と、を備えている。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アームＰＭ１１は、ドラムカートリッジ４０の第１方向の一方側に位置する。また、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２アームＰＭ１２は、ドラムカートリッジ４０の第１方向の他方側に位置する。 ス ラ イ ド As shown in FIG. 7, the slide mechanism PM1 includes a first arm PM11, a second arm PM12, and a plate PM13. When the drum cartridge 40 is mounted on the main body housing 2, the first arm PM11 is located on one side of the drum cartridge 40 in the first direction. In a state where the drum cartridge 40 is mounted on the main body housing 2, the second arm PM12 is located on the other side of the drum cartridge 40 in the first direction.
　各アームＰＭ１１，ＰＭ１２は、長尺状の部材である。アームＰＭ１１は、一端部と、他端部とを有する。また、アームＰＭ１２は、一端部と、他端部とを有する。アームＰＭ１１の一端部とアームＰＭ１２の一端部は、それぞれ、本体筐体２に連結され、さらに、アームＰＭ１１は、アームＰＭ１１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り、アームＰＭ１２も、アームＰＭ１２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。 Each arm PM11, PM12 is a long member. The arm PM11 has one end and the other end. The arm PM12 has one end and the other end. One end of the arm PM11 and one end of the arm PM12 are respectively connected to the main housing 2, and the arm PM11 is rotatable about the one end of the arm PM11 with respect to the main housing 2. The arm PM12 is also rotatable around the one end of the arm PM12 with respect to the main body housing 2.
　板ＰＭ１３は、第１方向に長い板状の部材である。板ＰＭ１３は、ドラムカートリッジ４０の下面に接触する。板ＰＭ１３は、第１方向における一端部と、他端部とを有する。
板ＰＭ１３の一端部は、アームＰＭ１１の他端部と連結され、さらに、板ＰＭ１３は、板ＰＭ１３の一端部を中心として、アームＰＭ１１の他端部に対して回動可能である。また、板ＰＭ１３の他端部は、アームＰＭ１２の他端部と連結され、さらに、板ＰＭ１３は、板ＰＭ１３の他端部を中心として、アームＰＭ１２の他端部に対して回動可能である。そして、第１アームＰＭ１１は、第１カバーＣ１に固定されている。これにより、第１アームＰＭ１１は、本体筐体２に対して、第１カバーＣ１とともに回動可能となっている。 The plate PM13 is a plate-shaped member that is long in the first direction. The plate PM13 contacts the lower surface of the drum cartridge 40. The plate PM13 has one end in the first direction and the other end.
One end of the plate PM13 is connected to the other end of the arm PM11, and the plate PM13 is rotatable around the one end of the plate PM13 with respect to the other end of the arm PM11. The other end of the plate PM13 is connected to the other end of the arm PM12, and the plate PM13 is rotatable around the other end of the plate PM13 with respect to the other end of the arm PM12. . The first arm PM11 is fixed to the first cover C1. Thereby, the first arm PM11 is rotatable with respect to the main body housing 2 together with the first cover C1.
　図８（ａ）に示すように、第１カバーＣ１が開けられた状態においては、アームＰＭ１１は、第１カバーＣ１と共に、第１位置へ移動する。アームＰＭ１１が第１位置に位置する状態において、アームＰＭ１１は、第１方向に沿っている。また、図８（ａ）に示すように、第１カバーＣ１が開けられた状態においては、アームＰＭ１２も、第１カバーＣ１と共に、第２位置へ移動する。アームＰＭ１２が第２位置に位置する状態において，アームＰＭ１２は、第１方向に沿っている。このとき、板ＰＭ１３は、本体筐体２の第１ガイド面Ｇ１１１よりも下に位置する。一方、第１カバーＣ１が、開けられた状態から、閉じた状態へ移動する場合、第１カバーＣ１は、図８（ｂ）に表す状態を経由して、図８（ｃ）の状態へ移動する。
　図８（ａ）～（ｃ）に示すように、第１カバーＣ１が閉じられる過程においては、アームＰＭ１１が第１位置から第３位置へ移動する。そして、図８（ｃ）に示すように、第１カバーＣ１が閉じられた状態においては、アームＰＭ１１は、第３位置となる。アームＰＭ１１は、第３位置に位置する状態において，アームＰＭ１１は、上下方向に沿っている。また、図８（ａ）～（ｃ）に示すように、第１カバーＣ１が閉じられる過程においては、アームＰＭ１２が第２位置から第４位置へ移動する。そして、図８（ｃ）に示すように、第１カバーＣ１が閉じられた状態においては、アームＰＭ１２は、第４位置となる。アームＰＭ１２は、第４位置に位置する状態において，アームＰＭ１２は、上下方向に沿っている。このとき、板ＰＭ１３は、本体筐体２の第１ガイド面Ｇ１１１よりも上に位置する。 As shown in FIG. 8A, when the first cover C1 is opened, the arm PM11 moves to the first position together with the first cover C1. In a state where the arm PM11 is located at the first position, the arm PM11 is along the first direction. 8A, when the first cover C1 is opened, the arm PM12 moves to the second position together with the first cover C1. In a state where the arm PM12 is located at the second position, the arm PM12 is along the first direction. At this time, the plate PM13 is located below the first guide surface G111 of the main body housing 2. On the other hand, when the first cover C1 moves from the opened state to the closed state, the first cover C1 moves to the state shown in FIG. 8C via the state shown in FIG. 8B. I do.
As shown in FIGS. 8A to 8C, in the process of closing the first cover C1, the arm PM11 moves from the first position to the third position. Then, as shown in FIG. 8C, when the first cover C1 is closed, the arm PM11 is at the third position. In a state where the arm PM11 is located at the third position, the arm PM11 extends along the up-down direction. Further, as shown in FIGS. 8A to 8C, in the process of closing the first cover C1, the arm PM12 moves from the second position to the fourth position. Then, as shown in FIG. 8C, when the first cover C1 is closed, the arm PM12 is at the fourth position. When the arm PM12 is located at the fourth position, the arm PM12 extends along the up-down direction. At this time, the plate PM13 is located above the first guide surface G111 of the main body housing 2.
　上記した構造により、アームＰＭ１１が第１位置から第３位置へ回動することで、板ＰＭ１３が、上方向に移動し、ドラムカートリッジ４０を押し上げる。そのため、第１カバーＣ１の開閉に連動して、ドラムカートリッジ４０が第２接触位置と第２離間位置とに移動可能となっている。また、アームＰＭ１２が第２位置から第４位置へ回動することで、板ＰＭ１３が、上方向に移動し、ドラムカートリッジ４０を押し上げる。そのため、第１カバーＣ１の開閉に連動して、ドラムカートリッジ４０が第２接触位置と第２離間位置とに移動可能となっている。このため、第１カバーＣ１の開閉に連動して、ドラムカートリッジ４０を第２接触位置と第２離間位置とに移動させることが可能となっている。 に よ り With the structure described above, the plate PM13 moves upward by pushing the arm PM11 from the first position to the third position, and pushes up the drum cartridge 40. Therefore, the drum cartridge 40 can be moved between the second contact position and the second separation position in conjunction with opening and closing of the first cover C1. When the arm PM12 rotates from the second position to the fourth position, the plate PM13 moves upward and pushes up the drum cartridge 40. Therefore, the drum cartridge 40 can be moved between the second contact position and the second separation position in conjunction with opening and closing of the first cover C1. For this reason, it is possible to move the drum cartridge 40 between the second contact position and the second separation position in conjunction with the opening and closing of the first cover C1.
　すなわち、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カバーＣ１が開放位置に位置する場合に、ドラムカートリッジ４０は、第２離間位置に位置する。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カバーＣ１が開放位置から閉鎖位置に移動する場合に、ドラムカートリッジ４０は、第２離間位置から第２接触位置に移動する。 That is, when the first cover C1 is located at the open position in a state where the drum cartridge 40 is mounted on the main body housing 2, the drum cartridge 40 is located at the second separated position. When the first cover C1 moves from the open position to the closed position in a state where the drum cartridge 40 is mounted on the main body case 2, the drum cartridge 40 moves from the second separated position to the second contact position.
　図５に示すように、現像カートリッジ５０は、図５（ｃ）に示す第１接触位置と、図５（ｂ）に示す第１離間位置との間で移動可能である。第１接触位置は、現像ローラ５１およびローラ５２が感光ドラム４１に接触する位置である。第１離間位置は、現像ローラ５１およびローラ５２が感光ドラム４１から離間する位置である。詳しくは、現像カートリッジ５０は、ドラムカートリッジ４０が第２接触位置に位置するときに、第１接触位置と第１離間位置とに移動可能となっている。現像カートリッジ５０が第１離間位置に位置する場合のローラ５２と中間転写ベルト６３の間の距離は、現像カートリッジ５０が第１接触位置に位置する場合のローラ５２と中間転写ベルト６３の間の距離よりも大きい。 (5) As shown in FIG. 5, the developing cartridge 50 is movable between a first contact position shown in FIG. 5 (c) and a first separated position shown in FIG. 5 (b). The first contact position is a position where the developing roller 51 and the roller 52 contact the photosensitive drum 41. The first separation position is a position where the developing roller 51 and the roller 52 are separated from the photosensitive drum 41. Specifically, when the drum cartridge 40 is located at the second contact position, the developing cartridge 50 can be moved between the first contact position and the first separation position. The distance between the roller 52 and the intermediate transfer belt 63 when the developing cartridge 50 is located at the first separation position is the distance between the roller 52 and the intermediate transfer belt 63 when the developing cartridge 50 is located at the first contact position. Greater than.
　現像カートリッジ５０が第１接触位置に位置する状態において、第２凸部Ｒ２は、第２凹部ＣＶ２から離脱している。現像カートリッジ５０が第１離間位置に位置する状態において、第２凸部Ｒ２は、第２凹部ＣＶ２に入っている。 (4) In a state where the developing cartridge 50 is located at the first contact position, the second convex portion R2 is separated from the second concave portion CV2. In a state where the developing cartridge 50 is located at the first separated position, the second convex portion R2 is in the second concave portion CV2.
　図５（ｃ）に示すように、本体筐体２は、押圧部材ＰＭ２を有する。押圧部材ＰＭ２は、図に実線で示す押圧位置と、図に破線で示す非押圧位置と、の間を移動可能となっている。押圧位置は、現像ローラ５１およびローラ５２を感光ドラム４１に向けて押圧するために現像フレームＦ２を押圧するときの位置である。非押圧位置は、現像カートリッジ５０の現像フレームＦ２を押圧しないときの位置である。押圧部材ＰＭ２が押圧位置に位置する場合に、押圧部材ＰＭ２は、現像フレームＦ２と接触する。押圧部材ＰＭ２が非押圧位置に位置する場合に、押圧部材ＰＭ２は、現像フレームＦ２と離間する。 本体 As shown in FIG. 5C, the main body housing 2 has a pressing member PM2. The pressing member PM2 is movable between a pressing position indicated by a solid line in the drawing and a non-pressing position indicated by a broken line in the drawing. The pressing position is a position at which the developing frame F2 is pressed to press the developing roller 51 and the roller 52 toward the photosensitive drum 41. The non-pressing position is a position when the developing frame F2 of the developing cartridge 50 is not pressed. When the pressing member PM2 is located at the pressing position, the pressing member PM2 contacts the developing frame F2. When the pressing member PM2 is located at the non-pressing position, the pressing member PM2 is separated from the developing frame F2.
　押圧部材ＰＭ２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１カバーＣ１が開放位置に位置する場合に、非押圧位置に位置する。また、押圧部材ＰＭ２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１カバーＣ１が閉鎖位置に位置する場合に、非押圧位置から押圧位置に移動する。なお、押圧部材ＰＭ２は、例えば、カラー印刷・モノクロ印刷などの印刷制御の違いに応じて、適宜、図示せぬ制御装置によって作動させることができる。また、押圧部材ＰＭ２は、第１カバーＣ１の開閉に連動して作動させてもよい。 (4) The pressing member PM2 is located at the non-pressing position when the first cover C1 is located at the open position when the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2. The pressing member PM2 moves from the non-pressing position to the pressing position when the first cover C1 is in the closed position in a state where the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2. The pressing member PM2 can be appropriately operated by a control device (not shown) according to a difference in printing control such as color printing and monochrome printing. Further, the pressing member PM2 may be operated in conjunction with opening and closing of the first cover C1.
　現像カートリッジ５０は、押圧部材ＰＭ２によって、第１接触位置と第１離間位置との間を移動可能となっている。具体的に、押圧部材ＰＭ２が押圧位置に位置するときには、現像カートリッジ５０は、第１接触位置に位置する。押圧部材ＰＭ２が非押圧位置に位置するときには、現像カートリッジ５０は、第１離間位置に位置する。そのため、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１カバーＣ１が開放位置に位置する場合には、押圧部材ＰＭ２が非押圧位置に位置するので、現像カートリッジ５０は、第１離間位置に位置する。また、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１カバーＣ１が閉鎖位置に位置する場合には、押圧部材ＰＭ２が非押圧位置から押圧位置へ移動することで、現像カートリッジ５０は、第１離間位置から第１接触位置へ移動する。 The developing cartridge 50 can be moved between the first contact position and the first separation position by the pressing member PM2. Specifically, when the pressing member PM2 is located at the pressing position, the developing cartridge 50 is located at the first contact position. When the pressing member PM2 is located at the non-pressing position, the developing cartridge 50 is located at the first separated position. Therefore, when the first cover C1 is located at the open position in a state where the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2, the pressing member PM2 is located at the non-pressing position. Are located at the first separated position. When the first cover C1 is located at the closed position in a state where the drum cartridge 40 and the developing cartridge 50 are mounted on the main body housing 2, the pressing member PM2 moves from the non-pressing position to the pressing position. The developing cartridge 50 moves from the first separation position to the first contact position.
　図６（ａ）に示すように、第１カバーＣ１は、４つの第１溝ＧＲ１と、４つの第２溝ＧＲ２と、を有する。第１溝ＧＲ１は、ドラムカートリッジ４０の第１ボスＢＳ１が入る溝である。第１溝ＧＲ１は、上下方向に長い長孔状に形成されている。詳しくは、第１溝ＧＲ１は、図２に示す第１ガイド面Ｇ１１に形成されている。図６（ａ），（ｂ）に示すように、ドラムカートリッジ４０は、第１ボスＢＳ１が第１溝ＧＲ１に沿って移動することで、第２接触位置と第２離間位置との間で移動するようになっている。 示 す As shown in FIG. 6A, the first cover C1 has four first grooves GR1 and four second grooves GR2. The first groove GR1 is a groove into which the first boss BS1 of the drum cartridge 40 enters. The first groove GR1 is formed in a long hole shape that is long in the vertical direction. Specifically, the first groove GR1 is formed on the first guide surface G11 shown in FIG. As shown in FIGS. 6A and 6B, the drum cartridge 40 moves between the second contact position and the second separation position when the first boss BS1 moves along the first groove GR1. It is supposed to.
　第２溝ＧＲ２は、現像カートリッジ５０の第２ボスＢＳ２が入る溝である。第２溝ＧＲ２は、上下方向に長い長孔状に形成されている。第２溝ＧＲ２は、第１溝ＧＲ１よりも下に位置する。現像カートリッジ５０は、第２ボスＢＳ２が第２溝ＧＲ２に沿って移動することで、第１接触位置と第１離間位置との間で移動するようになっている。 The second groove GR2 is a groove into which the second boss BS2 of the developing cartridge 50 enters. The second groove GR2 is formed in a vertically long slot shape. The second groove GR2 is located below the first groove GR1. The developing cartridge 50 moves between the first contact position and the first separation position as the second boss BS2 moves along the second groove GR2.
　詳しくは、図５（ｃ）に示すように、押圧部材ＰＭ２は、現像カートリッジ５０の下部を斜め上方に押圧する。すると、現像カートリッジ５０は、図６（ａ），（ｂ）に示すように、第２ボスＢＳ２を中心に回動しながら、上に移動する。これにより、現像カートリッジ５０を第１接触位置と第１離間位置とに良好に移動させることが可能となっている。 Specifically, as shown in FIG. 5C, the pressing member PM2 presses the lower portion of the developing cartridge 50 obliquely upward. Then, as shown in FIGS. 6A and 6B, the developing cartridge 50 moves upward while rotating about the second boss BS2. Thereby, the developing cartridge 50 can be favorably moved between the first contact position and the first separation position.
　図６（ｃ）および図７に示すように、本体筐体２は、壁２３を有する。壁２３は、カバーＣとの間でドラムカートリッジ４０および現像カートリッジ５０を挟む壁である。壁２３は、４つの第１溝ＧＲ１と、４つの第２溝ＧＲ２と、を有する。壁２３に形成される各溝ＧＲ１，ＧＲ２は、前述した第１カバーＣ１に形成される各溝ＧＲ１，ＧＲ２と同様の構造となっている。これにより、ドラムカートリッジ４０の第１方向の両側の第１ボスＢＳ１は、それぞれ、第１カバーＣ１の第１溝ＧＲ１と壁２３の第１溝ＧＲ１によってガイドされる。また、現像カートリッジ５０の第１方向の両側の第２ボスＢＳ２は、それぞれ、第１カバーＣ１の第２溝ＧＲ２と壁２３の第２溝ＧＲ２によってガイドされる。 本体 As shown in FIGS. 6C and 7, the main housing 2 has a wall 23. The wall 23 is a wall that sandwiches the drum cartridge 40 and the developing cartridge 50 with the cover C. The wall 23 has four first grooves GR1 and four second grooves GR2. The grooves GR1 and GR2 formed on the wall 23 have the same structure as the grooves GR1 and GR2 formed on the first cover C1 described above. Thereby, the first bosses BS1 on both sides in the first direction of the drum cartridge 40 are guided by the first groove GR1 of the first cover C1 and the first groove GR1 of the wall 23, respectively. The second bosses BS2 on both sides in the first direction of the developing cartridge 50 are guided by the second groove GR2 of the first cover C1 and the second groove GR2 of the wall 23, respectively.
　次に、各カートリッジ４０，５０の着脱方法や現像ローラ５１の感光ドラム４１への位置め方法について説明する。
　図５（ａ）に示すように、ドラムカートリッジ４０を本体筐体２に第１方向に装着する際には、ユーザは、本体筐体２の第１凸部Ｒ１がドラムカートリッジ４０の第１凹部ＣＶ１内に入るように、ドラムカートリッジ４０を第１ガイド面Ｇ１１１上に載せる。その後、ユーザは、ドラムカートリッジ４０を第１ガイド面Ｇ１１１に沿って第１方向にスライドさせる。 Next, a method of attaching and detaching the cartridges 40 and 50 and a method of positioning the developing roller 51 on the photosensitive drum 41 will be described.
As shown in FIG. 5A, when the drum cartridge 40 is mounted on the main body housing 2 in the first direction, the user needs to set the first convex portion R1 of the main body housing 2 to the first concave portion of the drum cartridge 40. The drum cartridge 40 is placed on the first guide surface G111 so as to enter the CV1. Thereafter, the user slides the drum cartridge 40 in the first direction along the first guide surface G111.
　図８（ａ）に示すように、ドラムカートリッジ４０が本体筐体２の壁２３に接触すると、ドラムカートリッジ４０の移動が止められる。この際、ドラムカートリッジ４０の第１ボスＢＳ１が、図６（ｃ）に示す壁２３の第１溝ＧＲ１内に入る。 As shown in FIG. 8A, when the drum cartridge 40 comes into contact with the wall 23 of the main body housing 2, the movement of the drum cartridge 40 is stopped. At this time, the first boss BS1 of the drum cartridge 40 enters the first groove GR1 of the wall 23 shown in FIG.
　図５（ａ）に示すように、現像カートリッジ５０を本体筐体２に第１方向に装着する際には、ユーザは、本体筐体２の第２凸部Ｒ２が現像カートリッジ５０の第２凹部ＣＶ２内に入るように、現像カートリッジ５０を第２ガイド面Ｇ１２１上に載せる。その後、ユーザは、現像カートリッジ５０を第２ガイド面Ｇ１２１に沿って第１方向にスライドさせる。 As shown in FIG. 5A, when the developing cartridge 50 is mounted on the main body housing 2 in the first direction, the user needs to make the second convex portion R2 of the main body housing 2 the second concave portion of the developing cartridge 50. The developer cartridge 50 is placed on the second guide surface G121 so as to enter the CV2. Thereafter, the user slides the developing cartridge 50 in the first direction along the second guide surface G121.
　現像カートリッジ５０が本体筐体２の壁２３に接触すると、現像カートリッジ５０の移動が止められる。この際、現像カートリッジ５０の第２ボスＢＳ２が、図６（ｃ）に示す壁２３の第２溝ＧＲ２内に入る。 (4) When the developing cartridge 50 comes into contact with the wall 23 of the main body housing 2, the movement of the developing cartridge 50 is stopped. At this time, the second boss BS2 of the developing cartridge 50 enters the second groove GR2 of the wall 23 shown in FIG.
　各カートリッジ４０，５０を本体筐体２に装着した後、図８（ｂ）に示すように、第１カバーＣ１を閉じていくと、スライド機構ＰＭ１が作動して、各ドラムカートリッジ４０が第２離間位置から第２接触位置に向けて移動していく。図８（ｃ）に示すように、第１カバーＣ１を閉じると、各ドラムカートリッジ４０の第２接触位置への移動が完了する。
また、この際、図６（ｂ）に示すように、ドラムカートリッジ４０の第１ボスＢＳ１が、第１カバーＣ１の第１溝ＧＲ１内に入る。さらに、この際、現像カートリッジ５０の第２ボスＢＳ２が、第１カバーＣ１の第２溝ＧＲ２内に入る。 After the cartridges 40 and 50 are mounted on the main body housing 2, as shown in FIG. 8B, when the first cover C1 is closed, the slide mechanism PM1 is operated, and each drum cartridge 40 is moved to the second position. It moves from the separated position to the second contact position. As shown in FIG. 8C, when the first cover C1 is closed, the movement of each drum cartridge 40 to the second contact position is completed.
At this time, as shown in FIG. 6B, the first boss BS1 of the drum cartridge 40 enters the first groove GR1 of the first cover C1. Further, at this time, the second boss BS2 of the developing cartridge 50 enters the second groove GR2 of the first cover C1.
　その後は、第２カバーＣ２を閉じることで、各カートリッジ４０，５０の本体筐体２への装着が完了する。なお、各カートリッジ４０，５０を本体筐体２から第１方向に取り出す作業は、前述した作業を逆の手順で行えばよい。 Thereafter, by closing the second cover C2, the mounting of the cartridges 40 and 50 to the main housing 2 is completed. The operation of removing the cartridges 40 and 50 from the main body housing 2 in the first direction may be performed by reversing the above-described operation.
　図５（ｂ），（ｃ）に示すように、現像カートリッジ５０を第１離間位置から第１接触位置に移動させる場合には、押圧部材ＰＭ２によって、現像カートリッジ５０の下端部が斜め上方に押圧される。これにより、現像カートリッジ５０は、第２ボスＢＳ２（図６（ｂ）参照）を中心に回動しながら、上方に移動する。そのため、図５（ｃ）により、現像ローラ５１とローラ５２がともに感光ドラム４１に接触する。これにより、現像ローラ５１を感光ドラム４１に対して位置決めすることができる。 As shown in FIGS. 5B and 5C, when the developing cartridge 50 is moved from the first separated position to the first contact position, the lower end of the developing cartridge 50 is pressed obliquely upward by the pressing member PM2. Is done. Thus, the developing cartridge 50 moves upward while rotating about the second boss BS2 (see FIG. 6B). Therefore, both the developing roller 51 and the roller 52 come into contact with the photosensitive drum 41 as shown in FIG. Thus, the developing roller 51 can be positioned with respect to 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。
　第１方向に着脱可能な現像カートリッジ５０が現像ローラ５１とは別のローラ５２を備えるだけで、現像ローラ５１を感光ドラム４１に対して位置決めすることができるので、構造を複雑化させることなく、現像ローラ５１を感光ドラム４１に対して位置決めすることができる。 According to the above, the following effects can be obtained in the present embodiment.
Since the developing roller 51 detachable in the first direction only includes the roller 52 different from the developing roller 51, the developing roller 51 can be positioned with respect to the photosensitive drum 41. The developing roller 51 can be positioned with respect to the photosensitive drum 41.
　第１カバーＣ１の開閉に連動してスライド機構ＰＭ１が作動するので、第１カバーＣ１を開閉するだけで、感光ドラム４１を中間転写ベルト６３に対して接触・離間させることができる。 (4) Since the slide mechanism PM1 operates in conjunction with the opening and closing of the first cover C1, the photosensitive drum 41 can be brought into contact with and separated from the intermediate transfer belt 63 only by opening and closing the first cover C1.
　なお、本発明は前記実施形態に限定されることなく、以下に例示するように様々な形態で利用できる。以下の説明においては、前記実施形態と略同様の構造となる部材には同一の符号を付し、その説明は省略する。 The present invention is not limited to the above embodiment, but can be used in various forms as exemplified below. In the following description, members having substantially the same structure as those of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.
　前記実施形態では、ドラムカートリッジ４０が第１ボスＢＳ１を有し、本体筐体２が第１溝ＧＲ１を有する構成としたが、本発明はこれに限定されない。例えば、ドラムカートリッジが第１溝を有し、本体筐体が第１ボスを有していてもよい。同様に、現像カートリッジが第２溝を有し、本体筐体が第２ボスを有していてもよい。 In the above embodiment, the drum cartridge 40 has the first boss BS1 and the main body housing 2 has the first groove GR1, but the present invention is not limited to this. For example, the drum cartridge may have a first groove, and the main body housing may have a first boss. Similarly, the developing cartridge may have the second groove, and the main body housing may have the second boss.
　前記実施形態では、ドラムカートリッジ４０が第１凹部ＣＶ１を有し、本体筐体２が第１凸部Ｒ１を有する構成としたが、本発明はこれに限定されない。例えば、ドラムカートリッジが第１凸部を有し、本体筐体が第１凹部を有していてもよい。同様に、現像カートリッジが第２凸部を有し、本体筐体が第２凹部を有していてもよい。 In the above embodiment, the drum cartridge 40 has the first concave portion CV1, and the main body housing 2 has the first convex portion R1, but the present invention is not limited to this. For example, the drum cartridge may have a first convex portion, and the main body housing may have a first concave portion. Similarly, the developing cartridge may have the second convex portion, and the main body housing may have the second concave portion.
　前記実施形態では、カラープリンタ１に本発明を適用したが、本発明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、複合機などに本発明を適用してもよい。 In the above-described embodiment, the present invention is applied to the color printer 1, but the present invention is not limited to this, and the present invention may be applied to other image forming apparatuses, for example, a monochrome printer, a copier, a multifunction peripheral, and the like. Good.
　前記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。 各 The components described in the above-described embodiment and modified examples may be implemented in any combination.
　１　　　カラープリンタ
　２　　　本体筐体
　２２Ａ　開口
　４０　　ドラムカートリッジ
　４１　　感光ドラム
　５０　　現像カートリッジ
　５１　　現像ローラ
　５２　　ローラ
　６３　　中間転写ベルト
　Ｃ１　　第１カバー
　Ｆ２　　現像フレーム
　Ｘ１　　第１軸
　Ｘ２　　第２軸
　Ｘ３　　第３軸
　Ｘ４　　第４軸 Reference Signs List 1 color printer 2 main body housing 22A opening 40 drum cartridge 41 photosensitive drum 50 developing cartridge 51 developing roller 52 roller 63 intermediate transfer belt C1 first cover F2 developing frame X1 first axis X2 second axis X3 third axis X4 fourth axis

Claims (10)

  1. 　本体筐体と、
    　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と、現像剤を収容する現像フレームと、前記第１方向に延びる第３軸について回転可能なローラと、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通過することを許容する前記本体筐体の開口を開閉するカバーであって、前記開口を開放する開放位置と前記開口を閉鎖する閉鎖位置との間を前記第１方向と交差する第２方向に延びる第４軸について移動可能なカバーと、
    　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よりも上方に位置する中間転写ベルトと、を備えた画像形成装置であって、
    　前記ドラムカートリッジおよび前記現像カートリッジが前記本体筐体に装着された状態において、前記カバーが前記開放位置に位置する場合に、前記現像カートリッジは、前記現像ローラおよび前記ローラが前記感光ドラムから離間する第１離間位置に位置し、
    　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、前記カバーが前記閉鎖位置に位置する場合に、前記現像カートリッジは、前記第１離間位置から前記現像ローラおよび前記ローラが前記感光ドラムと接触する第１接触位置へ移動することを特徴とする画像形成装置。     A main body housing,
    A drum cartridge having a photosensitive drum rotatable about a first axis extending in a first direction, wherein the drum cartridge is detachable from the main body housing in the first direction.
    A developing cartridge comprising: a developing roller rotatable about a second axis extending in the first direction; a developing frame for storing a developer; and a roller rotatable about a third axis extending in the first direction. A developing cartridge detachably attached to the main body housing in the first direction;
    A cover that opens and closes an opening of the main body housing that allows the drum cartridge and the developing cartridge to pass therethrough, wherein the first position is between an open position that opens the opening and a closed position that closes the opening. A cover movable about a fourth axis extending in a second direction intersecting the direction;
    An image forming apparatus comprising: an intermediate transfer belt positioned above the drum cartridge and the developing cartridge when the drum cartridge and the developing cartridge are mounted on the main body housing;
    In a state where the drum cartridge and the developing cartridge are mounted on the main body housing, when the cover is located at the open position, the developing cartridge is configured such that the developing roller and the roller are separated from the photosensitive drum. Located at one distant position,
    When the cover is located at the closed position in a state where the drum cartridge and the developing cartridge are mounted on the main body housing, the developing roller is configured such that the developing roller and the roller are moved from the first separated position. An image forming apparatus, wherein the image forming apparatus moves to a first contact position that contacts a photosensitive drum.
  2. 　前記中間転写ベルトの上方に位置する排紙部を備えたことを特徴とする請求項１に記載の画像形成装置。 2. The image forming apparatus according to claim 1, further comprising a paper discharge unit located above the intermediate transfer belt.
  3. 　前記ドラムカートリッジと前記現像カートリッジは、それぞれ独立して、前記本体筐体に装着可能であることを特徴とする請求項１または請求項２に記載の画像形成装置。 3. The image forming apparatus according to claim 1, wherein the drum cartridge and the developing cartridge can be independently mounted on the main body housing.
  4. 　前記ドラムカートリッジおよび前記現像カートリッジは、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で、前記第２方向に並ぶことを特徴とする請求項１から請求項３のいずれか一項に記載の画像形成装置。 4. The drum cartridge and the developing cartridge are arranged in the second direction in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. Item 10. The image forming apparatus according to item 1.
  5. 　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、前記ローラは、前記現像ローラの上方に位置することを特徴とする請求項１から請求項４のいずれか一項に記載の画像形成装置。 The image forming apparatus according to claim 1, wherein the roller is located above the developing roller when the developing cartridge is mounted on the main body housing. .
  6. 　前記ローラの外径は、前記現像ローラの外径よりも小さいことを特徴とする請求項１から請求項５のいずれか一項に記載の画像形成装置。 6. The image forming apparatus according to claim 1, wherein an outer diameter of the roller is smaller than an outer diameter of the developing roller.
  7. 　前記現像カートリッジが前記第１離間位置に位置する場合の前記ローラと前記中間転写ベルトの間の距離は、前記現像カートリッジが前記第１接触位置に位置する場合の前記ローラと前記中間転写ベルトの間の距離よりも大きいことを特徴とする請求項１から請求項６のいずれか一項に記載の画像形成装置。 The distance between the roller and the intermediate transfer belt when the developing cartridge is located at the first separation position is the distance between the roller and the intermediate transfer belt when the developing cartridge is located at the first contact position. The image forming apparatus according to any one of claims 1 to 6, wherein the distance is longer than the distance.
  8. 　前記現像ローラおよび前記ローラを前記感光ドラムに向けて押圧するために前記現像フレームを押圧する押圧位置と、前記現像カートリッジの前記現像フレームを押圧しない非押圧位置と、の間を移動可能な押圧部材を備え、
    　前記押圧部材は、
    　　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、前記カバーが開放位置に位置する場合に、前記非押圧位置に位置し、
    　　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、前記カバーが前記閉鎖位置に位置する場合に、前記非押圧位置から前記押圧位置に移動することを特徴とする請求項１から請求項７のいずれか一項に記載の画像形成装置。     A pressing member that can move between a pressing position that presses the developing frame to press the developing roller and the roller toward the photosensitive drum, and a non-pressing position that does not press the developing frame of the developing cartridge. With
    The pressing member,
    In a state where the drum cartridge and the developing cartridge are mounted on the main body housing, when the cover is located at the open position, the cover is located at the non-pressing position,
    2. The apparatus according to claim 1, wherein the cover moves from the non-pressed position to the pressed position when the cover is at the closed position in a state where the drum cartridge and the developing cartridge are mounted on the main body housing. The image forming apparatus according to any one of claims 1 to 7.
  9. 　前記押圧部材が前記押圧位置に位置する場合に、前記押圧部材は、前記現像フレームと接触し、
    　前記押圧部材が前記非押圧位置に位置する場合に、前記押圧部材は、前記現像フレームと離間することを特徴とする請求項８に記載の画像形成装置。     When the pressing member is located at the pressing position, the pressing member contacts the developing frame,
    The image forming apparatus according to claim 8, wherein when the pressing member is located at the non-pressing position, the pressing member is separated from the developing frame.
  10. 　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、前記カバーが前記開放位置に位置する場合に、前記ドラムカートリッジは、前記感光ドラムと前記中間転写ベルトが離間する第２離間位置に位置し、
    　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、前記カバーが前記開放位置から前記閉鎖位置に移動する場合に、前記ドラムカートリッジは、前記第２離間位置から前記感光ドラムと前記中間転写ベルトが接触する第２接触位置に移動することを特徴とする請求項１から請求項９のいずれか一項に記載の画像形成装置。     In a state where the drum cartridge is mounted on the main body housing, when the cover is located at the open position, the drum cartridge is located at a second separation position where the photosensitive drum and the intermediate transfer belt are separated. ,
    When the cover is moved from the open position to the closed position in a state where the drum cartridge is mounted on the main body housing, the drum cartridge moves the photosensitive drum and the intermediate transfer belt from the second separated position. The image forming apparatus according to claim 1, wherein the image forming apparatus moves to a second contact position where the image forming apparatus contacts.
PCT/JP2019/016285 2018-09-28 2019-04-16 Image formation device WO2020066090A1 (en)

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JP2018-184457 2018-09-28

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060291899A1 (en) * 2005-06-28 2006-12-28 Xerox Corporation Methods and systems for mounting an imaging media cartridge to a printer
JP2009116315A (en) * 2007-10-18 2009-05-28 Canon Inc Image forming apparatus
JP2009116261A (en) * 2007-11-09 2009-05-28 Canon Inc Image forming apparatus
JP2012063391A (en) * 2010-09-14 2012-03-29 Canon Inc Electrophotographic image forming apparatus
JP2017156743A (en) * 2016-02-29 2017-09-07 キヤノン株式会社 Developing cartridge and image forming apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060291899A1 (en) * 2005-06-28 2006-12-28 Xerox Corporation Methods and systems for mounting an imaging media cartridge to a printer
JP2009116315A (en) * 2007-10-18 2009-05-28 Canon Inc Image forming apparatus
JP2009116261A (en) * 2007-11-09 2009-05-28 Canon Inc Image forming apparatus
JP2012063391A (en) * 2010-09-14 2012-03-29 Canon Inc Electrophotographic image forming apparatus
JP2017156743A (en) * 2016-02-29 2017-09-07 キヤノン株式会社 Developing cartridge and image forming apparatus

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