WO2014080540A1 - Image forming device - Google Patents

Image forming device Download PDF

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Publication number
WO2014080540A1
WO2014080540A1 PCT/JP2012/081128 JP2012081128W WO2014080540A1 WO 2014080540 A1 WO2014080540 A1 WO 2014080540A1 JP 2012081128 W JP2012081128 W JP 2012081128W WO 2014080540 A1 WO2014080540 A1 WO 2014080540A1
Authority
WO
WIPO (PCT)
Prior art keywords
cartridge
interference
guide
image forming
forming apparatus
Prior art date
Application number
PCT/JP2012/081128
Other languages
French (fr)
Japanese (ja)
Inventor
進 佐久間
篤史 三輪
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
Priority to CN201290001307.8U priority Critical patent/CN204925625U/en
Publication of WO2014080540A1 publication Critical patent/WO2014080540A1/en

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Classifications

    • 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
    • G03G21/1839—Means for handling the process cartridge in the apparatus body
    • G03G21/1842—Means for handling the process cartridge in the apparatus body for guiding and mounting the process cartridge, positioning, alignment, locks

Definitions

  • the present invention relates to an image forming apparatus employing an electrophotographic system.
  • a printer including a main body casing and a process cartridge that includes a photosensitive drum and is configured to be detachable from the main body casing.
  • a guide groove for guiding the mounting of the process cartridge is provided in the main body casing, the process cartridge includes a housing for accommodating the photosensitive drum, and the photosensitive drum is along the axial direction.
  • a laser printer has been proposed that includes a drum shaft that extends and protrudes from both ends of the housing (see, for example, Patent Document 1).
  • the mounting of the process cartridge on the main body casing is guided by fitting both end portions of the drum shaft into the guide grooves.
  • the user may forcibly insert the process cartridge into the main body casing accidentally in a state where both ends of the drum shaft are not fitted in the guide grooves.
  • both ends of the drum shaft interfere with the members in the main body casing, and the members in the main body casing are damaged, or both ends of the drum shaft are caught by the members in the main body casing and inserted by mistake. It may be difficult to remove the process cartridge from the main casing.
  • an object of the present invention is to provide an image forming apparatus capable of suppressing erroneous insertion of a cartridge into the apparatus main body.
  • an image forming apparatus of the present invention is configured to rotate about an axis and has a cartridge having a rotating body configured to carry a developer; An apparatus main body having a cartridge mounting portion configured to be mounted with a cartridge.
  • the main body of the apparatus has a guide portion configured to guide mounting of the cartridge with respect to the cartridge mounting portion, and a path different from the mounting track of the cartridge guided by the guide portion and mounted to the cartridge mounting portion. And a restricting portion for restricting insertion of the cartridge when inserted into the apparatus main body.
  • the cartridge When the cartridge is inserted into the apparatus main body with a different trajectory, the cartridge moves in a direction in which the interference portion comes into contact with the restriction portion and when the restriction portion and the interference portion come into contact with each other, the interference portion moves away from the restriction portion.
  • a regulating member that regulates.
  • the apparatus main body since the apparatus main body has the guide portion, the cartridge is guided to the guide portion when the cartridge is attached to the cartridge attachment portion. Therefore, the mounting operation of the cartridge with respect to the cartridge mounting portion can be facilitated.
  • the apparatus main body has a restriction portion and the cartridge has an interference portion
  • the interference portion and the restriction portion come into contact with each other. Further insertion into the device body is restricted. Therefore, erroneous insertion of the cartridge into the apparatus main body can be suppressed.
  • the cartridge is restricted by the restriction member from moving in a direction in which the interference part moves away from the restriction part when the restriction part and the interference part come into contact with each other. For this reason, the interference portion and the restriction portion can be reliably brought into contact with each other when inserted into the apparatus main body along a track different from the mounting track.
  • the guide portion may be configured to guide the first side, which is one side in the axial direction along the axis of the cartridge, as a reference when the cartridge is mounted on the cartridge mounting portion.
  • the guide portion guides with reference to the first side of the cartridge.
  • the interference unit includes a first interference unit provided on the first side in the axial direction, and a second interference unit provided on the second side opposite to the first side in the axial direction. You may have. In this case, the axial length of the second interference part is formed longer than the axial length of the first interference part.
  • the axial length of the second interference portion is formed to be longer than the axial length of the first interference portion, so when the cartridge is mounted on the cartridge mounting portion, Even if a relatively large backlash occurs on the second side of the cartridge, the second interference portion and the restriction portion can be reliably brought into contact with each other.
  • the cartridge may have a frame that accommodates the rotating body.
  • the second interference unit is supported by the frame as a separate member from the frame.
  • the second interference portion may have a relatively large backlash compared to the first side of the cartridge. Therefore, the impact when the second interference portion and the restriction portion contact each other may be greater than the impact when the first interference portion and the restriction portion contact each other.
  • the frame may include a first frame that rotatably supports the rotating body and a second frame that is assembled to the first frame so as to cover the rotating body.
  • a second interference part support part that supports the second interference part may be provided at an end part on the second side of the second frame. In this case, the second interference portion support portion is reinforced.
  • the impact caused by the contact between the second interference part and the restricting part causes the second interference part to pass through the second interference part. Acts on the support section.
  • the second frame may support a charger configured to charge the surface of the rotating body.
  • a first interference portion support portion that supports the first interference portion is provided at an end portion on the first side of the first frame.
  • the first interference part is supported by the first interference part support part provided in the first frame, the impact when the first interference part and the regulation part come into contact is charged. It can suppress acting on the 2nd frame which supports a container. Therefore, it can suppress that the relative positional accuracy of a charger and a rotary body falls.
  • the second interference part is supported by the second interference part support part provided in the second frame.
  • the second interference part support part is reinforced and the deformation is suppressed, It can suppress that the relative positional accuracy of a charger and a rotary body falls by the impact when a control part contacts.
  • frame may have the wall part arrange
  • positioned at the 2nd side is comprised so that rigidity may become larger than the wall part arrange
  • positioned in the vicinity of the 2nd interference part is on the 1st side. It is comprised so that rigidity may become larger than the wall part arrange
  • the cartridge may have a first guided portion guided by the guide portion.
  • the apparatus main body has an abutting portion that abuts the first guided portion when the restricting portion and the interference portion come into contact with each other, and restricts the cartridge from moving in a direction away from the restricting portion. ing.
  • the first guided portion is guided by the guide portion, so that the smooth mounting operation of the cartridge to the cartridge mounting portion is reliably ensured. can do.
  • the restricting portion and the interference portion come into contact with each other, the first guided portion of the cartridge comes into contact with the contact portion of the apparatus main body, so that it is ensured that the cartridge moves so that the interference portion moves away from the restricting portion.
  • an opening for attaching and detaching the cartridge may be formed in the apparatus main body. In this case, the contact portion is exposed from the upstream side in the mounting direction through the opening.
  • the contact portion is exposed from the upstream side in the mounting direction through the opening, the first portion that contacts the contact portion when the restricting portion and the interference portion come into contact with each other.
  • the guided portion is exposed from the upstream side in the mounting direction through the opening.
  • the user can easily confirm that the first guided portion and the contact portion are in contact with each other, and can easily grasp that the cartridge is inserted into the apparatus main body along a track different from the mounting track.
  • the interference part may be provided in the downstream part of the mounting direction of the cartridge in the cartridge.
  • the movement of the cartridge can be regulated at an early stage when the cartridge is erroneously inserted into the apparatus main body, as compared with the case where the interference portion is provided in the upstream portion of the cartridge mounting direction.
  • the cartridge may have a gripping part that is gripped when being attached to and detached from the cartridge mounting part.
  • the gripping part may protrude from the opening part toward the upstream side in the mounting direction when the restricting part and the interference part come into contact with each other.
  • the gripping part is gripped when the cartridge is attached to and detached from the cartridge mounting part, so that the attaching / detaching operation of the cartridge to the cartridge mounting part can be facilitated.
  • the apparatus main body may have an opening / closing member configured to move to an open position where the opening is opened and a closed position where the opening is closed.
  • the opening / closing member is configured such that the movement from the open position to the closed position is restricted when the restricting portion and the interference portion come into contact with each other.
  • the cartridge when the restricting portion and the interference portion come into contact with each other, since the movement of the opening / closing member from the open position to the closed position is restricted, the cartridge is erroneously inserted into the apparatus main body, It can suppress that an opening-and-closing member is arrange
  • the opening / closing member is disposed at a restriction position where movement to the downstream side in the mounting direction is restricted by contact between the restriction part and the interference part when moving from the open position to the closed position.
  • the cartridge is configured to move from the restriction position to the guide position where the first guided portion is guided by the guide portion when the grip portion is pressed by the pressing portion.
  • the pressing portion presses the grip portion of the cartridge, and the first guided portion is moved toward the guide portion.
  • the cartridge is moved from the restriction position toward the guide position.
  • the cartridge in the restricting position is once removed from the apparatus main body, it is not necessary to insert the cartridge into the apparatus main body again, and by moving the opening / closing member from the open position to the closed position, the cartridge is To the guide position.
  • the grip portion may have a guide surface that moves the cartridge from the restriction position toward the guide position when pressed by the pressing portion.
  • the 1st to-be-guided part may be formed in the substantially cylindrical shape extended in the axial direction along an axis.
  • the first guided portion is formed in a substantially cylindrical shape, when the pressing portion presses the gripping portion and the first guided portion is moved toward the guide portion, Smooth movement of the first guided portion can be ensured.
  • the cartridge may have a second guided portion provided on the downstream side in the cartridge mounting direction with respect to the first guided portion.
  • the guide part may have a first guide part configured to guide the first guided part and a second guide part configured to guide the second guided part.
  • the interference part is disposed in the vicinity of the second guided part.
  • the first guided portion is guided by the first guide portion, and the second guided portion is guided by the second guide portion. Therefore, it is possible to further facilitate the mounting operation of the cartridge with respect to the cartridge mounting portion.
  • the interference part which contacts a control part and the 2nd guided part guided by the 2nd guide part are arrange
  • the interference unit may be configured to receive the regulating unit from the upstream side in the cartridge mounting direction.
  • the interference portion receives the restriction portion from the upstream side in the mounting direction. And the restricting portion can be reliably engaged.
  • the image forming apparatus of the present invention erroneous insertion of the cartridge into the apparatus main body can be reliably suppressed.
  • FIG. 1 is a central sectional view of a printer as an embodiment of the image forming apparatus of the present invention.
  • FIG. 2 is a perspective view of the process cartridge shown in FIG. 1 as viewed from the upper left side.
  • FIG. 3 is a perspective view of the process cartridge shown in FIG. 2 as viewed from the upper right side.
  • FIG. 4 is a perspective view of the process cartridge shown in FIG. 3 as viewed from the front upper side.
  • FIG. 5 is a perspective view of the printer shown in FIG. 1 as viewed from the upper right side, and shows a state where the process cartridge is in the mounting position.
  • FIG. 6 is a perspective view of the printer shown in FIG. 1 as viewed from the upper right side, and shows a state in which the process cartridge is in the restriction position.
  • FIG. 1 is a central sectional view of a printer as an embodiment of the image forming apparatus of the present invention.
  • FIG. 2 is a perspective view of the process cartridge shown in FIG. 1 as viewed from the upper left side
  • FIG. 7 is a plan view of the printer shown in FIG.
  • FIG. 8 is a cross-sectional view of the printer shown in FIG.
  • FIG. 9 is a cross-sectional view taken along the line BB of the printer shown in FIG. 7 and shows a state where the process cartridge is in the restriction position.
  • FIG. 10 is a cross-sectional view taken along the line BB of the printer for explaining the movement state of the process cartridge shown in FIG. 8, and shows a state where the process cartridge is in the process of moving from the restricting position to the guide position.
  • FIG. 11 is a cross-sectional view taken along the line BB of the printer for explaining the movement state of the process cartridge following FIG. 10 and shows the state where the process cartridge is in the guide position.
  • FIG. 10 is a cross-sectional view taken along the line BB of the printer for explaining the movement state of the process cartridge following FIG. 10 and shows the state where the process cartridge is in the guide position.
  • FIG. 12 is a cross-sectional view taken along the line CC of the printer shown in FIG. 7 and shows a state where the process cartridge is in the restricting position.
  • FIG. 13 is a cross-sectional view taken along the line CC of the printer for explaining the movement state of the process cartridge shown in FIG. 12, and shows a state where the process cartridge is in the process of moving from the restricting position to the guide position.
  • FIG. 14 is a cross-sectional view taken along the line CC of FIG. 13 for explaining the movement state of the process cartridge, and shows the state where the process cartridge is in the guide position.
  • a printer 1 as an example of an image forming apparatus includes a main body casing 2 as an example of an apparatus main body.
  • the main casing 2 is formed in a substantially box shape, and forms an image on the fed paper P and a paper feeding unit 3 configured to feed the paper P as an example of a recording medium in the internal space thereof.
  • the image forming unit 4 configured to do so is accommodated.
  • the left side of the paper in FIG. 1 is the rear side and the right side of the paper in FIG. 1 is the front side, based on the state where the printer 1 is placed horizontally. Further, when the printer 1 is viewed from the front side, the left and right sides are used as a reference, the paper side in FIG. 1 is the left side, and the back side is the right side. Further, the upper side of the drawing in FIG. 1 is the upper side, and the lower side of the drawing is the lower side.
  • the left-right direction is an example of the axial direction
  • the left side is a first side that is one side in the axial direction
  • the right side is a second side that is the other side in the axial direction.
  • the up-down direction is an example of an orthogonal direction orthogonal to the axial direction
  • the lower side is one side of the orthogonal direction
  • the upper side is the other side of the orthogonal direction.
  • the cartridge opening 5 is formed to attach and detach a process cartridge 15 to be described later, and is formed through the upper end of the main casing 2 in the vertical direction.
  • the paper opening 6 is formed to introduce the paper P, and is formed through the front end of the main casing 2 in the front-rear direction.
  • the main casing 2 is provided with a top cover 7 as an example of an opening / closing member at the upper end, and a paper feed cover 8 at the front end.
  • the top cover 7 is formed so as to extend in the front-rear direction, and a pressing portion 10 is provided at a substantially central portion in the front-rear direction on the lower surface thereof.
  • a plurality of pressing portions 10 are provided corresponding to the pressed portions 78 described later, specifically, as shown in FIG. 5, two are provided at intervals in the left-right direction. Further, as shown in FIG. 1, the pressing portion 10 is formed in a substantially rectangular shape in a side view protruding downward from the lower surface of the top cover 7 and extends in the left-right direction.
  • the inclined surface 43 is formed so as to incline backward as it goes downward from the substantially vertical center of the front surface of the pressing portion 10.
  • the top cover 7 is swingably provided with the rear end portion as a fulcrum, in a closed position for closing the cartridge opening 5 and an open position for opening the cartridge opening 5 as shown in FIG. Yes.
  • the paper feed cover 8 is swingably provided between a closed position for closing the paper opening 6 and an open position for opening the paper opening 6 with the lower end portion as a fulcrum. .
  • each of the top cover 7 and the paper feed cover 8 arranged at the closed position is indicated by a solid line, and each of the top cover 7 and the paper feed cover 8 arranged between the closed position and the open position is shown. Is indicated by a virtual line.
  • the paper feed unit 3 includes a paper placement unit 9 provided at the bottom of the main casing 2. The paper placing portion 9 is communicated with the outside of the main body casing 2 through the paper opening 6.
  • the front side portion of the paper P is stacked on the upper surface of the paper feed cover 8 and the rear side portion of the paper P is placed through the paper opening 6 in a state where the paper feed cover 8 is disposed at the open position. Stacked in the unit 9.
  • the image forming unit 4 includes a process cartridge 15 as an example of a cartridge, a scanner unit 16, and a fixing unit 17.
  • the process cartridge 15 is configured to be detachable from the main casing 2 and is mounted on the main casing 2 above the rear portion of the paper feed unit 3.
  • the process cartridge 15 includes a drum cartridge 18 that is detachably attached to the main body casing 2 and a developing cartridge 19 that is detachably attached to the drum cartridge 18.
  • the drum cartridge 18 includes a photosensitive drum 20 as an example of a rotating body, a transfer roller 21, and a scorotron charger 22.
  • the photosensitive drum 20 is rotatably provided on the rear side portion of the drum cartridge 18.
  • the transfer roller 21 is disposed on the rear side of the photosensitive drum 20 so as to be in pressure contact with the photosensitive drum 20 from the rear side, and is rotatably provided on the drum cartridge 18.
  • the scorotron charger 22 is disposed opposite to the front upper side of the photosensitive drum 20 with an interval.
  • the developing cartridge 19 is disposed on the front lower side of the photosensitive drum 20. Further, the developing cartridge 19 includes a developing frame 25.
  • the developing frame 25 is formed in a substantially box shape extending in the left-right direction, and a rear end portion thereof is opened rearward.
  • a toner storage chamber 26 and a developing chamber 27 are partitioned in parallel in the front-rear direction.
  • the toner storage chamber 26 and the developing chamber 27 are communicated with each other through a communication port 28.
  • the toner storage chamber 26 stores toner as an example of a developer, and an agitator 29 is provided at a substantially central portion in the front-rear and vertical directions.
  • the developing chamber 27 is provided with a developing roller 34, a supply roller 33, and a layer thickness regulating blade 35.
  • the developing roller 34 includes a developing roller shaft 52 extending in the left-right direction, and a rubber roller 48 that covers the developing roller shaft 52 so that both ends thereof are exposed.
  • the developing roller 34 is disposed at the rear end portion of the developing chamber 27 such that the rubber roller 48 is exposed from the rear side and the upper side and is in contact with the photosensitive drum 20 from the front lower side.
  • the developing roller 34 is supported by the developing frame 25 by rotatably supporting both ends of the developing roller shaft 52 on the left and right side walls of the developing frame 25. Both end portions of the developing roller shaft 52 protrude from the left and right side walls of the developing frame 25 outward in the left-right direction.
  • color members 49 formed in a substantially cylindrical shape are provided at both ends of the developing roller shaft 52, respectively. The color member 49 covers both ends of the developing roller shaft 52 from the radially outer side.
  • the supply roller 33 includes a supply roller shaft 50 extending in the left-right direction, and a sponge roller 51 that covers the supply roller shaft 50 so that both ends thereof are exposed.
  • the supply roller 33 is disposed so that the sponge roller 51 is in pressure contact with the rubber roller 48 from the front lower side, and both ends of the supply roller shaft 50 are rotatably supported on the left and right side walls of the developing frame 25.
  • the development frame 25 is supported.
  • the layer thickness regulating blade 35 is supported by the developing frame 25 so as to contact the developing roller 34 from the front side.
  • the scanner unit 16 is disposed in front of the process cartridge 15 in the main body casing 2.
  • the scanner unit 16 emits a laser beam L based on image data toward the photosensitive drum 20 to expose the peripheral surface of the photosensitive drum 20.
  • the fixing unit 17 is disposed above the rear portion of the drum cartridge 18 in the main body casing 2.
  • the fixing unit 17 includes a heating roller 38 and a pressure roller 39 that presses against the heating roller 38 from the upper rear side.
  • (4) Image Forming Operation The toner in the toner storage chamber 26 of the developing cartridge 19 is supplied to the supply roller 33 through the communication port 28 by the rotation of the agitator 29, and further supplied to the developing roller 34. Between 33 and the developing roller 34, it is triboelectrically charged to the positive polarity.
  • the toner supplied to the developing roller 34 is regulated by the layer thickness regulating blade 35 as the developing roller 34 rotates, and is carried on the surface of the developing roller 34 as a thin layer having a constant thickness.
  • the surface of the photosensitive drum 20 is uniformly charged by the scorotron charger 22 and then exposed by the scanner unit 16. Thereby, an electrostatic latent image based on the image data is formed on the peripheral surface of the photosensitive drum 20.
  • the toner carried on the developing roller 34 is supplied to the electrostatic latent image on the circumferential surface of the photosensitive drum 20, whereby the toner image is carried on the circumferential surface of the photosensitive drum 20.
  • the paper P stacked on the paper placement unit 9 is sent between the paper feed roller 12 and the paper feed pad 13 by the rotation of the pickup roller 11, and is fed one by one by the rotation of the paper feed roller 12. Thereafter, the sheet P is conveyed to the sheet feeding path 14 extending in the vertical direction by the rotation of the sheet feeding roller 12, and is fed between the photosensitive drum 20 and the transfer roller 21 one by one at a predetermined timing. Paper. Then, when passing between the photosensitive drum 20 and the transfer roller 21, the toner image is transferred to the paper P to form an image.
  • the paper P is heated and pressed when it passes between the heating roller 38 and the pressure roller 39. At this time, the image is thermally fixed on the paper P. Thereafter, the paper P is conveyed toward the pair of paper discharge rollers 40 and is discharged onto a paper discharge tray 41 formed on the upper surface of the top cover 7 by the paper discharge rollers 40.
  • the process cartridge 15 includes the drum cartridge 18 and the developing cartridge 19 as described above and shown in FIGS.
  • the side on which the photosensitive drum 20 is disposed is the rear side of the process cartridge 15, and the side on which the scorotron charger 22 is disposed is the upper side. . That is, the up / down / front / rear direction with respect to the process cartridge 15 is different from the up / down / front / rear direction with respect to the printer 1, and the process cartridge 15 is arranged on the printer 1 so that the front side is the front lower side of the printer 1 and the rear side is the rear upper side of the printer 1. It is installed.
  • the drum cartridge 18 includes a drum frame 45 as an example of a frame.
  • the drum frame 45 includes a base frame 46 as an example of a first frame and a cover frame 47 as an example of a second frame.
  • the base frame 46 is formed of a resin material such as a polymer alloy of polycarbonate and polystyrene, and a pair of left and right base side walls 54 as an example of a wall portion;
  • a base lower wall 55, a base rear wall 56, and a base front wall 57 are integrally provided.
  • the pair of base side walls 54 are arranged to face each other with a space therebetween in the left-right direction.
  • the base side wall 54 (hereinafter referred to as the base left wall 54L) disposed on the left side is a rear side portion as shown in FIG.
  • the drum accommodating portion side wall 60 as an example and a developing accommodating portion side wall 61 which is a front side portion thereof are integrally provided.
  • the drum housing side wall 60 is formed in a substantially flat plate shape that is substantially rectangular in a side view.
  • the development accommodating portion side wall 61 is formed in a substantially rectangular shape in side view extending continuously from the lower portion of the front end edge of the drum accommodating portion side wall 60 toward the front upper side.
  • a collar receiving groove 62 and a fitting recess 63 are formed in the base left wall 54L.
  • the color receiving groove 62 is formed above the connecting portion of the front end portion of the drum accommodating portion side wall 60 with the developing accommodating portion side wall 61, and is substantially U-shaped from the front end edge of the drum accommodating portion side wall 60. It is formed in a letter shape. Further, the lower surface of the color receiving groove 62 is continuous with the upper surface of the developing container side wall 61.
  • the fitting recessed part 63 is formed in the rear side part in the left surface of the drum accommodating part side wall 60. As shown in FIG.
  • the fitting recess 63 is notched in a substantially rectangular shape in a side view that is recessed from the left surface of the drum housing side wall 60 to the right and that is recessed downward from the rear portion of the upper end edge of the drum housing side wall 60. Is formed.
  • the base left wall 54L is integrally provided with a first interference part 64 as an example of an interference part and a left guide boss 65 as an example of a regulating member and a first guided part.
  • the first interference portion 64 is provided at the front end portion of the upper end surface of the drum housing portion side wall 60 and is formed in a substantially rectangular shape in side view protruding upward from the upper end surface of the drum housing portion side wall 60. Further, as shown in FIG. 8, the rear end surface of the first interference portion 64 is formed to incline backward as it goes upward.
  • the left guide boss 65 is provided at a front end portion on the left surface of the developer accommodating portion side wall 61 and is formed in a substantially cylindrical shape that protrudes leftward from the left surface of the developer accommodating portion side wall 61. .
  • the base side wall 54 (hereinafter referred to as the base right wall 54R) disposed on the right side of the pair of base side walls 54, as shown in FIG. , And a developing container side wall 69 which is a front portion thereof.
  • the drum housing side wall 68 is formed in a substantially flat plate shape that is substantially rectangular when viewed from the side.
  • the development accommodating portion side wall 69 is formed in a substantially rectangular shape in side view extending continuously from the lower portion of the front end edge of the drum accommodating portion side wall 60 toward the front upper side.
  • a collar receiving groove 74 and a fitting recess 70 are formed in the base right wall 54R.
  • the color receiving groove 74 is connected to the developing container side wall 69 at the front end of the drum container side wall 68 so as to coincide with the color receiving groove 62 formed in the base left wall 54L when projected in the left-right direction. It is formed on the upper side.
  • the fitting recess 70 is formed in the upper portion of the right surface of the drum accommodating portion side wall 68. Further, the fitting recess 70 is recessed from the right surface of the drum housing side wall 68 toward the left, and is recessed substantially downward from the substantially central portion in the front-rear direction at the upper end edge of the drum housing side wall 60. It is formed in a circular shape.
  • the base right wall 54R is integrally provided with a reinforcing portion 71 and a right guide boss 72 as an example of a restricting member and a first guided portion.
  • the reinforcing portion 71 is provided on the right surface of the base right wall 54R so as to cover the collar receiving groove 74 from the right side.
  • the reinforcing portion 71 is formed in a substantially trapezoidal shape in a side view that becomes narrower as it goes upward, and covers the color receiving groove 74 in the upper portion thereof, and the drum accommodating portion side wall 68 and the developer accommodating portion in the lower portion.
  • the connecting portion with the side wall 69 is covered.
  • the base right wall 54R is reinforced by the reinforcing portion 71, and is configured to be more rigid than the base left wall 54L.
  • the right guide boss 72 is provided at the front end portion on the right surface of the developing container side wall 69 so as to coincide with the left guide boss 65 when projected in the left-right direction.
  • the right guide boss 72 is formed in a substantially cylindrical shape that protrudes rightward from the right surface of the developer accommodating portion side wall 61.
  • the base lower wall 55 is formed in a substantially flat plate shape that is long in the left-right direction so as to be bridged between the lower ends of the base side walls 54.
  • the base rear wall 56 is constructed between the rear ends of the base side walls 54 as shown in FIG. As shown in FIG. 1, the base rear wall 56 is formed in a substantially circular arc shape in a side view opened toward the front upper side, and is formed in a substantially partial cylindrical shape extending in the left-right direction.
  • the transfer roller 21 is rotatably accommodated inside the base rear wall 56.
  • the base front wall 57 is constructed between the front end portions of both base side walls 54, and the lower end portion thereof is connected to the front end portion of the base lower wall 55. Further, the base front wall 57 is formed so as to incline forward as it goes upward from the front end of the base lower wall 55. Further, as shown in FIGS. 9 and 12, the base front wall 57 is disposed on the rear side of the center axis of the left guide boss 65 and the right guide boss 72 when projected in the left-right direction.
  • a grip portion 75 is integrally provided on the base front wall 57.
  • the grip portion 75 integrally includes an extension portion 76, a grip portion 77, and a pressed portion 78.
  • the extending portion 76 is continuously forward from the substantially central portion in the left-right direction at the upper end portion of the base front wall 57, and is forwardly moved upward so that the inclination is the same as the base front wall 57. Inclined.
  • the gripping portion 77 is formed in a substantially rectangular tube shape that protrudes rearward from a substantially central portion in the left-right direction on the rear surface of the extending portion 76.
  • the pressed portions 78 are provided on both the left and right ends of the rear surface of the extending portion 76, and are formed in a substantially flat plate shape that is substantially rectangular in a side view and protrudes rearward from the rear surface of the extending portion 76.
  • the pressed portion 78 is disposed opposite to the left and right end portions of the gripping portion 77 on the outer side in the left-right direction with a gap therebetween.
  • the upper end portion of the pressed portion 78 is disposed slightly below the upper end portion of the extending portion 76.
  • the upper end surface of the pressed portion 78 is partitioned as a guide surface 79 as an example of a guide surface.
  • the guide surface 79 is formed so as to extend along the front-rear direction.
  • the cover frame 47 is formed of a resin material such as a polymer alloy of polycarbonate and acrylonitrile / butadiene / styrene resin, and has a substantially rectangular tube shape extending in the left-right direction and opened downward and forward.
  • the cover frame 47 includes a pair of left and right cover side walls 80, a cover upper wall 81, and a cover rear wall 82.
  • the pair of cover side walls 80 are arranged to face each other with a space in the left-right direction.
  • a cover side wall 80 (hereinafter referred to as a cover left wall 80L) disposed on the left side is formed in a substantially flat plate shape that is substantially rectangular in a side view as shown in FIG. Yes.
  • the cover left wall 80L is formed in substantially the same shape and size as the fitting recess 63 in a side view, and is formed so as to be able to fit into the fitting recess 63.
  • a cover side wall 80 (hereinafter referred to as a cover right wall 80R) disposed on the right side is formed in a substantially rectangular flat plate shape extending in the front-rear direction as shown in FIG. Has been.
  • a fitting convex portion 85 and an electrode cover 84 are provided on the cover right wall 80R.
  • the fitting convex portion 85 is formed in a substantially semicircular shape in a side view projecting downward from a substantially central portion in the front-rear direction of the lower end edge of the cover right wall 80R.
  • the fitting convex portion 85 is formed in substantially the same shape and size as the fitting concave portion 70 in a side view, and is formed so as to be fitted into the fitting concave portion 70.
  • the electrode cover 84 is formed of a resin material such as a polymer alloy of polycarbonate and acrylonitrile / butadiene / styrene resin as a separate member from the cover right wall 80R.
  • the electrode cover 84 is formed in a substantially flat plate shape that is substantially rectangular in a side view extending in the front-rear direction, and is supported by the upper portion of the right surface of the cover right wall 80R.
  • the electrode cover 84 is integrally provided with an electrode holding portion 86 as an example of a second interference portion support portion and a second interference portion 87 as an example of an interference portion.
  • the electrode holding portion 86 is formed in a substantially rectangular tube shape that protrudes rightward from the front end portion on the right surface of the electrode cover 84. Thereby, the electrode holding
  • the second interference part 87 is provided on the upper surface of the electrode holding part 86, and is formed in a substantially crank shape in a side view.
  • the second interference portion 87 integrally includes a rear portion 89, a front portion 88, and a step portion 90.
  • the rear portion 89 is formed in a substantially flat plate shape that is substantially rectangular in plan view.
  • the front side portion 88 is disposed on the front side and the upper side of the front side portion 88, and is formed in a substantially flat plate shape having a substantially rectangular shape in plan view.
  • the stepped portion 90 is provided so as to connect the front end portion of the rear portion 89 and the rear end portion of the front portion 88, and rearward as it goes upward from the front end portion of the rear portion 89. It is formed so as to be inclined.
  • the left-right direction length L2 of the 2nd interference part 87 is formed longer than the left-right direction length L1 of the 1st interference part 64, as shown in FIG.
  • a charger electrode 91 is provided on the cover right wall 80R.
  • the charger electrode 91 is accommodated in the electrode holding portion 86 so as to be exposed from the right side, and is electrically connected to the scorotron charger 22.
  • the charger electrode 91 is brought into contact with a main body electrode provided in the main body casing 2 in a state where the process cartridge 15 is disposed at a mounting position described later. Then, power from the main body electrode is supplied to the scorotron charger 22 via the charger electrode 91.
  • the cover upper wall 81 is provided between the upper ends of the cover side walls 80, and is formed in a substantially rectangular tube shape that extends in the left-right direction and opens downward. As shown in FIG. 1, the above scorotron charger 22 is supported inside the cover upper wall 81.
  • the cover rear wall 82 is installed between the rear ends of the cover side walls 80, and the upper end thereof is connected to the rear end of the cover upper wall 81. As shown in FIG. 1, the cover rear wall 82 is formed so as to incline backward as it goes downward.
  • a paper discharge opening 92 is formed in the cover rear wall 82.
  • the paper discharge opening 92 is formed in a central portion of the cover rear wall 82 and is formed to penetrate in a substantially rectangular shape in rear view extending in the left-right direction.
  • the drum frame 45 has a front portion partitioned as a developing cartridge storage portion 95 and a rear portion partitioned as a drum storage portion 96.
  • the developing cartridge housing portion 95 is defined in detail by a pair of developing housing portion side walls 61, a base front wall 57 and a front lower portion of the base lower wall 55.
  • the upper side is opened so as to allow
  • the developer cartridge 19 is accommodated in the developer cartridge accommodating portion 95.
  • the left color member 49 is received in the color receiving groove 62 of the base left wall 54L
  • the right color member 49 is received in the color receiving wall of the base right wall 54R. It is received in the groove 74.
  • the drum accommodating portion 96 is partitioned by a pair of drum accommodating portion side walls 60, a base rear wall 56, a rear portion of the base lower wall 55, and a cover frame 47.
  • the rear surface of the first interference portion 64 and the stepped portion 90 of the second interference portion 87 are configured to coincide with each other when projected in the left-right direction.
  • the photosensitive drum 20 is accommodated in the internal space of the drum accommodating portion 96.
  • the photosensitive drum 20 includes a drum body 97 and a drum shaft 98.
  • the drum body 97 is formed in a substantially cylindrical shape extending in the left-right direction, and a photosensitive layer made of resin is formed on the peripheral surface thereof so as to cover the peripheral surface.
  • the drum shaft 98 is formed in a substantially cylindrical shape extending in the left-right direction, and is inserted into the drum main body 97 so as to be relatively rotatable so that the central axis thereof coincides with the central axis of the drum main body 97.
  • the left end portion 105 of the drum shaft 98 passes through the drum housing side wall 60 and the cover left wall 80L so as not to be relatively rotatable in the left-right direction, and the right end portion 106 of the drum shaft 98 is As shown in FIG. 2, the drum accommodating portion side wall 68 and the fitting convex portion 85 are penetrated so as not to be relatively rotatable in the left-right direction.
  • the photosensitive drum 20 is supported by the base frame 46 and the cover frame 47 so as to be rotatable about the axis A extending in the left-right direction. Further, the photosensitive drum 20 is covered from above by a cover upper wall 81 of the cover frame 47.
  • the left end portion 105 of the drum shaft 98 protrudes leftward from the cover left wall 80L, and the right end portion 106 of the drum shaft 98 extends rightward from the fitting convex portion 85. Protrudes toward.
  • Each of the left end portion 105 and the right end portion 106 of the drum shaft 98 functions as an example of a second guided portion.
  • the first interference unit 64 is disposed in the vicinity of the left end portion 105 of the drum shaft 98 in the left-right direction
  • the second interference unit 87 is the right end portion of the drum shaft 98 in the left-right direction. It is arranged in the vicinity of 106. 3.
  • the main body casing 2 includes a pair of main body side walls 100 arranged to face each other with a gap in the left-right direction. As shown in FIG. 1, a cartridge mounting portion 101 is provided.
  • the cartridge mounting unit 101 is configured to mount the process cartridge 15, and is disposed between the rear portion of the sheet feeding unit 3 in the vertical direction and the fixing unit 17 in the rear portion of the main body casing 2. Yes.
  • the cartridge mounting portion 101 is formed in a substantially L shape in a side view extending in the left-right direction, and includes a first mounting portion 102 that is a front portion and a second mounting portion 103 that is a rear portion.
  • the first mounting portion 102 is formed in a substantially rectangular shape in a side view extending in the front-rear direction, and rotatably supports the pickup roller 11 and the paper feed roller 12 at the lower end portion thereof. Further, the upper surface of the first mounting portion 102 is formed along the lower end portion of the process cartridge 15, specifically, the lower surface of the base lower wall 55 corresponding to the developing cartridge housing portion 95.
  • the second mounting portion 103 is formed in a substantially rectangular shape in a side view extending in the vertical direction, and an engagement groove 104 is formed in a substantially central portion in the vertical direction on the front surface.
  • the engagement groove 104 is formed in a substantially curved shape in side view that is recessed rearward from the front surface of the second mounting portion 103, and extends along the rear end portion of the process cartridge 15, specifically, the outer peripheral surface of the base rear wall 56. Is formed.
  • the second mounting portion 103 is disposed on the rear side of the first mounting portion 102 with an interval.
  • the rear surface of the first mounting portion 102 and the portion of the front surface of the second mounting portion 103 facing the first mounting portion 102 form the paper feed path 14 described above.
  • the main body casing 2 is provided with a guide part 110 and a protrusion 111 as an example of a restricting part.
  • the guide portion 110 is provided so as to face each other on each of the pair of left and right main body side walls 100.
  • the guide part 110 includes a drum shaft guide part 112 as an example of a second guide part, a boss guide part 113 as an example of a first guide part, and an example of a contact part.
  • the contact surface 114 is provided.
  • the drum shaft guide portion 112 is formed so as to be recessed from the inner side surface in the left-right direction of the main body side wall 100 toward the outer side in the left-right direction, and is inclined downward from the substantially central portion in the front-rear direction at the upper end portion of the main body side wall 100. It is provided as follows. Further, the rear end portion of the drum shaft guide portion 112 is a substantially central portion in the vertical direction of the rear end portion of the main body side wall 100, and is disposed on the front side of the engagement groove 104 of the second mounting portion 103.
  • the boss guide portion 113 is formed so as to be recessed from the left and right inner side surface of the main body side wall 100 toward the outer side in the left and right direction, and is provided on the front side of the drum shaft guide portion 112 with a space therebetween. And so as to incline backward as it goes downward.
  • the boss guide portion 113 integrally includes an upper first portion 115 and a lower second portion 116.
  • the first portion 115 is provided so as to be inclined downward from the upper end portion of the main body side wall 100 toward the rear so as to have substantially the same inclination as the drum shaft guide portion 112.
  • the second portion 116 is bent so that the downward inclination is larger than that of the first portion 115, and is inclined so as to be inclined backward as it goes downward. That is, each of the drum shaft guide portion 112 and the boss guide portion 113 is provided such that the distance between the drum shaft guide portion 112 and the boss guide portion 113 in the front-rear direction increases toward the downstream side in the mounting direction X, which will be described later. .
  • the second portion 116 is formed in a substantially curved shape in side view that bulges toward the front lower side. Further, the rear end portion of the second portion 116 is disposed in front of the rear end portion of the drum shaft guide portion 112 and on the front upper side of the front end portion of the first mounting portion 102.
  • the contact surface 114 is formed between the drum shaft guide portion 112 and the boss guide portion 113 at the upper end portion of the main body side wall 100, and as shown in FIG.
  • the upper end portion at the rear end edge and the upper end portion at the front end edge of the boss guide portion 113 are formed so as to extend along the front-rear direction.
  • the protrusion 111 is provided on each of the pair of left and right main body side walls 100 so as to coincide with each other when projected in the left-right direction.
  • the protrusion 111 includes a first protrusion 117 provided on the left main body side wall 100 and a second protrusion 118 provided on the right main body side wall 100.
  • the first protrusion 117 is provided on the rear upper portion of the right side surface of the main body side wall 100 corresponding to the first interference portion 64.
  • the first protrusion 117 is formed in a substantially triangular shape in a side view that tapers toward the front, and as shown in FIG. .
  • the second protrusion 118 is provided on the rear upper portion of the left surface of the right side wall 100 corresponding to the stepped portion 90 of the second interference portion 87.
  • the second protrusion 118 is formed in a substantially triangular shape in a side view that tapers toward the front, and protrudes leftward from the left surface of the left main body side wall 100. 4).
  • the top cover 7 of the main casing 2 is placed in the open position.
  • the contact surface 114 is exposed from the front upper side through the cartridge opening 5.
  • the gripping portion 77 of the gripping portion 75 of the drum cartridge 18 is gripped, and the process cartridge 15 is moved to the rear lower side, the left guide boss 65 and the right guide boss 72. Is placed on the front upper side.
  • the left end portion 105 and the right end portion 106 of the drum shaft 98 are directed from the front upper side to the rear lower side with respect to the left guide boss 65 and the right guide boss 72. It is provided downstream in the mounting direction X. Further, the first interference part 64 and the second interference part 87 are provided in the rear lower part of the process cartridge 15, that is, in the downstream part in the mounting direction X.
  • the process cartridge 15 is mounted so that the left end portion 105 and the right end portion 106 of the drum shaft 98 are fitted to the corresponding drum shaft guide portions 112 from the front upper side. It is inserted into the main body casing 2 through the cartridge opening 5 along the direction X.
  • the process cartridge 15 is pushed rearward and downward along the drum shaft guide portion 112. Then, each of the left end portion 105 and the right end portion 106 of the drum shaft 98 is guided by the corresponding drum shaft guide portion 112, and the process cartridge 15 is moved rearward and downward along the mounting direction X. At this time, the drum shaft guide portion 112 guides with reference to the left end portion 105 of the drum shaft 98 as shown in FIG.
  • each of the left guide boss 65 and the right guide boss 72 is fitted to the first portion 115 of the corresponding boss guide portion 113 from the front upper side, as shown in FIGS.
  • the process cartridge 15 is disposed at the guide position where each of the left guide boss 65 and the right guide boss 72 is guided by the corresponding boss guide portion 113.
  • each of the left guide boss 65 and the right guide boss 72 is guided by the corresponding first portion 115 and reaches the lower end portion of the first portion 115.
  • the first interference part 64 passes through the front lower side of the first protrusion 117, and the second interference part 87 passes through the front lower side of the second protrusion 118.
  • the process cartridge 15 is moved rearward and downward along the mounting direction X, and is rotated clockwise in the left side view with the drum shaft 98 as a fulcrum.
  • the drum shaft guide portion 112 guides using the left end portion 105 of the drum shaft 98 as a reference, and the second portion 116 of the boss guide portion 113 guides using the left guide boss 65 as a reference.
  • each of the left end portion 105 and the right end portion 106 of the drum shaft 98 reaches the lower end portion of the corresponding drum shaft guide portion 112, and the left guide boss 65 and right side
  • each of the guide bosses 72 reaches the lower end portion of the corresponding second portion 116, further movement toward the downstream side in the mounting direction X is restricted.
  • the rear end portion of the process cartridge 15 is received from the front side into the engagement groove 104 of the second mounting portion 103 and the lower end portion thereof is supported by the first mounting portion 102 from below.
  • the process cartridge 15 is arranged at the mounting position where the process cartridge 15 is mounted on the cartridge mounting portion 101. That is, the guide unit 110 guides the mounting of the process cartridge 15 on the cartridge mounting unit 101.
  • the top cover 7 is moved from the open position to the closed position, whereby the mounting of the process cartridge 15 on the main casing 2 is completed.
  • the procedure is reversed to the above-described mounting operation.
  • the process cartridge 15 may be inserted into the main body casing 2 by a trajectory different from the mounting trajectory of the process cartridge 15 in the above mounting operation. is there.
  • the user may accidentally move each of the left guide boss 65 and the right guide boss 72 toward the drum shaft guide portion 112 that is different from the corresponding boss guide portion 113.
  • the process cartridge 15 is excessively pushed backward with respect to the main body casing 2.
  • the left guide boss 65 and the right guide boss 72 move to the drum shaft guide portion 112 side.
  • the process cartridge 15 is pushed into the main casing 2 rearward and downward.
  • the first interference portion 64 is engaged with the first protrusion 117 from the upstream side in the mounting direction X as shown in FIG.
  • One protrusion 117 is received.
  • the second interference part 87 receives the second protrusion 118 from the upstream side in the mounting direction X so as to be engaged with the second protrusion 118. That is, as shown in FIGS. 8 and 12, the first interference part 64 and the first protrusion 117 are engaged, and the second interference part 87 and the second protrusion 118 are engaged.
  • the process cartridge 15 is arranged at the restriction position where the further insertion into the main body casing 2 toward the rear lower side is restricted.
  • each of the left guide boss 65 and the right guide boss 72 is in contact with the corresponding contact surface 114 from above. For this reason, the front end portion of the process cartridge 15 is restricted from moving downward, and the process cartridge 15 is restricted from turning clockwise with the drum shaft 98 as a fulcrum.
  • each of the first interference portion 64 and the second interference portion 87 may move in a direction away from each of the first protrusion 117 and the second protrusion 118. It is regulated.
  • the gripping portion 75 protrudes from the cartridge opening portion 5 toward the front upper side as shown in FIGS.
  • the left guide boss 65 and the right guide boss 72 are exposed from the front upper side through the cartridge opening portion 5 while being in contact with the corresponding contact surface 114.
  • the base front wall 57 and the extending portion 76 are arranged along the vertical direction, and each of the left guide boss 65 and the right guide boss 72 has its center axis line. Are arranged so as to be located on the front side of the base front wall 57. Further, the guide surface 79 of the pressed portion 78 is arranged along the direction connecting the rear lower part and the front upper part.
  • the lower end portion of the inclined surface 43 of the pressing portion 10 comes into contact with the upper end portion of the extending portion 76 of the grip portion 75 from the rear upper side, and the lower end portion of the pressing portion 10 is the guide surface 79 of the pressed portion 78. Abut from above.
  • the inclined surface 43 of the pressing portion 10 presses the upper end portion of the extending portion 76 of the gripping portion 75 forward and downward, and the pressing portion 10.
  • the lower end portion of the member presses the guide surface 79 of the pressed portion 78 toward the front lower side.
  • the front end of the process cartridge 15 is moved forward and the rear end thereof is moved forward and upward. That is, the guide surface 79 of the pressed portion 78 moves the process cartridge 15 from the restriction position toward the guide position.
  • the second interference part 87 is moved toward the front upper side, and the engagement between the second interference part 87 and the second protrusion 118 is released.
  • the first interference portion 64 is similarly moved toward the front upper side, and the engagement between the first interference portion 64 and the first protrusion 117 is released.
  • the process cartridge 15 is moved from the restriction position to the guide position where the left guide boss 65 and the right guide boss 72 are guided by the corresponding boss guide portions 113.
  • the pressing portion 10 presses the guide surface 79 of the pressed portion 78 of the grip portion 75 toward the front lower side.
  • the process cartridge 15 is moved rearward and downward along the mounting direction X as the top cover 7 is rotated, and is rotated clockwise in the left side view with the drum shaft 98 as a fulcrum. .
  • the left end portion 105 and the right end portion 106 of the drum shaft 98 reach the lower end portion of the corresponding drum shaft guide portion 112 and the left side.
  • the guide boss 65 and the right guide boss 72 reach the lower end of the corresponding second portion 116.
  • the process cartridge 15 is disposed at a mounting position where the process cartridge 15 is mounted on the cartridge mounting portion 101 as indicated by a virtual line.
  • the main body casing 2 has a guide portion 110 as shown in FIG. 9. Therefore, as shown in FIGS. 11 and 14, when the process cartridge 15 is mounted on the cartridge mounting portion 101, the process cartridge 15 is guided by the guide portion 110. As a result, the mounting operation of the process cartridge 15 on the cartridge mounting portion 101 can be facilitated.
  • the main body casing 2 has a protrusion 111
  • the process cartridge 15 has a first interference portion 64 and a second interference portion 87. Therefore, when the process cartridge 15 is inserted into the main body casing 2 along a trajectory different from the mounting trajectory, each of the first interference portion 64 and the second interference portion 87 and the corresponding protrusion 111, specifically, the first protrusion 117 and the second protrusion 118 engage with each other, and further insertion of the process cartridge 15 into the main body casing 2 is restricted. As a result, erroneous insertion of the process cartridge 15 into the main casing 2 can be suppressed.
  • the first interference part 64 is the first protrusion.
  • the movement of the second interference portion 87 in a direction away from the second protrusion 118 from 117 is restricted by the left guide boss 65 and the right guide boss 72 coming into contact with the corresponding contact surface 114.
  • the process cartridge 15 is restricted by the left guide boss 65 and the right guide boss 72 from moving downward at the front end thereof.
  • each of the first interference part 64 and the second interference part 87 and each of the first protrusion 117 and the second protrusion 118 are reliably brought into contact with each other when inserted into the main body casing 2 along a path different from the mounting path. be able to.
  • the guide part 110 is arranged such that when the process cartridge 15 is mounted on the cartridge mounting part 101, the left end part of the process cartridge 15, specifically, the left end part 105 of the drum shaft 98.
  • the left guide boss 65 is used as a reference. Therefore, since the guide part 110 can reliably guide the left end part of the process cartridge 15, a stable mounting operation of the process cartridge 15 can be ensured.
  • the left-right direction length L2 of the 2nd interference part 87 is formed longer than the left-right direction length L1 of the 1st interference part 64, as shown in FIG.
  • the process cartridge 15 is mounted on the cartridge mounting portion 101. Even if a relatively large backlash occurs at the right end portion of the process cartridge 15, the second interference portion 87 and the protrusion 111 can be reliably brought into contact with each other.
  • the second interference portion 87 is provided on an electrode cover 84 which is a separate member from the drum frame 45, and the electrode cover 84 having the second interference portion 87 is a drum frame. 45. Therefore, as shown in FIG. 12, it is possible to suppress an impact when the second interference portion 87 and the protrusion 111 are in contact with each other, and thus to the drum frame 45 that houses the photosensitive drum 20. Can be suppressed. For this reason, it is possible to suppress a decrease in the positional accuracy of the photosensitive drum 20 with respect to the drum frame 45.
  • the drum frame 45 includes a base frame 46 and a cover frame 47 assembled to the base frame 46 as shown in FIG.
  • an electrode holding portion 86 that supports the second interference portion 87 is provided on the cover right wall 80R of the cover frame 47.
  • the impact caused by the contact between the second interference part 87 and the protrusion 111 acts on the electrode holding part 86 via the second interference part 87.
  • the electrode holding portion 86 is reinforced, it is possible to prevent the electrode holding portion 86 from being deformed even if an impact due to contact between the second interference portion 87 and the protrusion 111 acts on the electrode holding portion 86.
  • the second interference portion 87 since the electrode holding portion 86 is reinforced, even if an unintended external force is applied to the right end portion of the process cartridge 15 when the process cartridge 15 is attached to the cartridge attachment portion 101, the second interference portion 87. It is possible to reliably suppress the electrode holding portion 86 from being deformed by an impact caused by contact between the first protrusion 118 and the second protrusion 118.
  • the cover frame 47 supports the scorotron charger 22 as shown in FIG. Further, as shown in FIG. 2, a first interference portion 64 is provided on the drum accommodating portion side wall 60 of the base frame 46.
  • the second interference portion 87 is supported by the electrode holding portion 86.
  • the electrode holding portion 86 is reinforced and the deformation is suppressed, the second interference portion 87 and the protrusion 111. It is possible to suppress the relative positional accuracy between the scorotron charger 22 and the photosensitive drum 20 from being reduced due to an impact when they contact each other.
  • the base right wall 54R is configured to have greater rigidity than the base left wall 54L.
  • the process cartridge 15 has a left guide boss 65 and a right guide boss 72 as shown in FIGS. Further, each of the pair of left and right main body side walls 100 of the main body casing 2 has a contact surface 114 as shown in FIG.
  • the left guide boss 65 and the right guide boss 72 are in contact with the corresponding contact surface 114, so that the process cartridge 15 It is possible to reliably regulate the movement of the front end of the lower portion toward the lower side. (9) Further, as shown in FIG. 5, the contact surface 114 is exposed from the front upper side through the cartridge opening 5. Therefore, in the state where the process cartridge 15 is disposed at the restriction position, as shown in FIG. 6, the left guide boss 65 and the right guide boss 72 that abut against the corresponding abutment surface 114 are connected via the cartridge opening 5. It is exposed from the front upper side.
  • the user can easily confirm that each of the left guide boss 65 and the right guide boss 72 and the corresponding contact surface 114 are in contact with each other, and the process cartridge 15 has a main body casing with a track different from the mounting track. 2 can be easily grasped.
  • the first interference portion 64 and the second interference portion 87 are downstream in the mounting direction X of the process cartridge 15 during the mounting operation of the process cartridge 15 with respect to the main body casing 2. It is provided in the side part.
  • each of the first interference portion 64 and the second interference portion 87 and the first protrusion 117 are inserted.
  • Each of the second protrusions 118 comes into contact with the second protrusion 118, and the process cartridge 15 is disposed at the restriction position.
  • the process cartridge 15 when the process cartridge 15 is erroneously inserted into the main casing 2, the movement of the process cartridge 15 can be regulated at an early stage. (11) Further, as shown in FIGS. 2 and 3, the process cartridge 15 has a gripping portion 75.
  • the gripping portion 75 can be gripped, and the attachment / detachment work of the process cartridge 15 to the cartridge mounting portion 101 can be facilitated.
  • the grip portion 75 protrudes from the cartridge opening portion 5 toward the front upper side in a state where the process cartridge 15 is disposed at the restriction position.
  • the process cartridge 15 arranged at the restriction position can be easily detached from the main casing 2 by grasping the grasping portion 75.
  • the main body casing 2 has the top cover 7, as shown in FIG. 9 and FIG. The top cover 7 is restricted from moving from the open position to the closed position in a state where the process cartridge 15 is disposed at the restriction position.
  • the top cover 7 is provided with a pressing portion 10 as shown in FIGS. 10 and 13.
  • the pressing portion 10 presses the grip portion 75 of the process cartridge 15, and the left guide boss 65 and the right guide boss 72 correspond to the corresponding boss guide. It moves toward the part 113.
  • the process cartridge 15 is moved from the restriction position toward the guide position.
  • the pressed portion 78 has a guide surface 79 as shown in FIGS.
  • the guide surface 79 is pressed against the lower end portion of the pressing portion 10. Thereby, the process cartridge 15 can be reliably moved from the restriction position toward the guide position.
  • the left guide boss 65 and the right guide boss 72 are formed in a substantially cylindrical shape extending in the left-right direction, as shown in FIGS.
  • the process cartridge 15 has a drum shaft 98 extending in the left-right direction.
  • each of the left end portion 105 and the right end portion 106 of the drum shaft 98 is guided by the corresponding drum shaft guide portion 112. Therefore, it is possible to further facilitate the mounting operation of the process cartridge 15 on the cartridge mounting portion 101.
  • each of the first interference unit 64 and the second interference unit 87 and each of the left end portion 105 and the right end portion 106 of the drum shaft 98 are disposed in the vicinity in the left-right direction.
  • the relative positional relationship between the first interference portion 64 and the left end portion 105 of the drum shaft 98 can be kept constant, and the relative positional relationship between the second interference portion 87 and the right end portion 106 of the drum shaft 98. Can be kept constant.
  • each of the first interference unit 64 and the second interference unit 87 is inserted into the main body casing 2 along a track different from the mounting track.
  • Each of the first protrusion 117 and the second protrusion 118 is received from the upstream side in the mounting direction X. Therefore, each of the 1st interference part 64 and the 2nd interference part 87, and each of the 1st protrusion 117 and the 2nd protrusion 118 can be engaged reliably.
  • the printer 1 described above is an embodiment of the image forming apparatus of the present invention, and the present invention is not limited to the above-described embodiment.
  • the image forming apparatus of the present invention can be configured as a color printer in addition to the above-described monochrome printer.
  • the image forming apparatus When the image forming apparatus is configured as a color printer, the image forming apparatus includes a direct tandem type color printer including a plurality of photosensitive drums and a recording medium conveying member, a plurality of photosensitive drums, an intermediate transfer member, and a transfer member. It can be configured as an intermediate transfer type tandem color printer.
  • process cartridge 15 may be configured as an integral type integrally including the drum cartridge 18 and the developing cartridge 19 in addition to the separation type in which the drum cartridge 18 and the developing cartridge 19 are separated as described above.
  • the developing cartridge 19 corresponds to an example of the cartridge.
  • the photosensitive drum 20 is an example of a rotating body.
  • the rotating body includes a photosensitive member such as the photosensitive drum 20 and a roller member such as a developing roller 34 and a supply roller 33. It is.
  • the developing roller 34 provided in the developing cartridge 19 corresponds to an example of the rotating body.
  • the above-described printer 1 can be configured as a multi-function machine equipped with an image reading unit and the like.

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  • Electrophotography Configuration And Component (AREA)

Abstract

Provided is an image forming device such that it is possible to reduce errors in insertion of a cartridge into the device main body. In a printer (1), when a process cartridge (15) which has a first interference part (64) and a second interference part (87) is inserted into a body casing (2) by a path which is different from a mounting path, the first interference part (64) and the second interference part (87) contact protrusions (111) which are disposed at the body casing (2). When the first interference part (64) and the second interference part (87) contact the corresponding protrusions (111), the process cartridge (15) is restricted from moving in a direction in which the first interference part (64) and the second interference part (87) separate from the corresponding protrusions (111).

Description

画像形成装置Image forming apparatus
　本発明は、電子写真方式が採用される画像形成装置に関する。 The present invention relates to an image forming apparatus employing an electrophotographic system.
　電子写真方式の画像形成装置として、本体ケーシングと、感光ドラムを備え、本体ケーシングに対して着脱可能に構成されるプロセスカートリッジとを備えるプリンタが知られている。 As an electrophotographic image forming apparatus, there is known a printer including a main body casing and a process cartridge that includes a photosensitive drum and is configured to be detachable from the main body casing.
　そのようなプリンタとしては、例えば、本体ケーシングに、プロセスカートリッジの装着を案内するためのガイド溝が設けられ、プロセスカートリッジが、感光ドラムを収容する筐体を備え、感光ドラムが、軸方向に沿って延び、両端部が筐体から突出するドラム軸を備えるレーザプリンタが提案されている（例えば、特許文献１参照）。 As such a printer, for example, a guide groove for guiding the mounting of the process cartridge is provided in the main body casing, the process cartridge includes a housing for accommodating the photosensitive drum, and the photosensitive drum is along the axial direction. A laser printer has been proposed that includes a drum shaft that extends and protrudes from both ends of the housing (see, for example, Patent Document 1).
　そして、そのようなプリンタでは、ドラム軸の両端部がガイド溝に嵌合されることにより、プロセスカートリッジの本体ケーシングに対する装着がガイドされる。 In such a printer, the mounting of the process cartridge on the main body casing is guided by fitting both end portions of the drum shaft into the guide grooves.
特開２００５－２４２０６６号公報JP 2005-242066 A
　しかるに、特許文献１に記載のプリンタでは、ドラム軸の両端部がガイド溝に嵌合されていない状態で、ユーザが誤って、プロセスカートリッジを本体ケーシングに無理に挿入してしまう場合がある。 However, in the printer described in Patent Document 1, the user may forcibly insert the process cartridge into the main body casing accidentally in a state where both ends of the drum shaft are not fitted in the guide grooves.
　そうすると、ドラム軸の両端部が本体ケーシング内の部材と干渉して、本体ケーシング内の部材が破損してしまう場合や、ドラム軸の両端部が本体ケーシング内の部材に引っ掛かり、誤って挿入されたプロセスカートリッジを、本体ケーシングから離脱させることが困難となる場合がある。 Then, both ends of the drum shaft interfere with the members in the main body casing, and the members in the main body casing are damaged, or both ends of the drum shaft are caught by the members in the main body casing and inserted by mistake. It may be difficult to remove the process cartridge from the main casing.
　そこで、本発明の目的は、カートリッジの装置本体に対する誤った挿入を抑制できる画像形成装置を提供することにある。 Accordingly, an object of the present invention is to provide an image forming apparatus capable of suppressing erroneous insertion of a cartridge into the apparatus main body.
（１）上記した目的を達成するために、本発明の画像形成装置は、軸線を中心として回転するように構成され、かつ、現像剤を担持するように構成される回転体を有するカートリッジと、カートリッジが装着されるように構成されるカートリッジ装着部を有する装置本体と、を備えている。 (1) In order to achieve the above-described object, an image forming apparatus of the present invention is configured to rotate about an axis and has a cartridge having a rotating body configured to carry a developer; An apparatus main body having a cartridge mounting portion configured to be mounted with a cartridge.
　装置本体は、カートリッジ装着部に対するカートリッジの装着をガイドするように構成されるガイド部と、ガイド部にガイドされて、カートリッジ装着部に装着されるときのカートリッジの装着軌跡と異なる軌跡で、カートリッジが装置本体に挿入されたときに、カートリッジの挿入を規制する規制部と、を有している。 The main body of the apparatus has a guide portion configured to guide mounting of the cartridge with respect to the cartridge mounting portion, and a path different from the mounting track of the cartridge guided by the guide portion and mounted to the cartridge mounting portion. And a restricting portion for restricting insertion of the cartridge when inserted into the apparatus main body.
　カートリッジは、異なる軌跡で装置本体に挿入されたときに、規制部と接触する干渉部と、規制部と干渉部とが接触するときに、干渉部が規制部から離れる方向にカートリッジが移動することを規制する規制部材とを有している。 When the cartridge is inserted into the apparatus main body with a different trajectory, the cartridge moves in a direction in which the interference portion comes into contact with the restriction portion and when the restriction portion and the interference portion come into contact with each other, the interference portion moves away from the restriction portion. And a regulating member that regulates.
　このような構成によれば、装置本体がガイド部を有しているので、カートリッジがカートリッジ装着部に装着されるときに、カートリッジは、ガイド部にガイドされる。そのため、カートリッジのカートリッジ装着部に対する装着作業の円滑化を図ることができる。 According to such a configuration, since the apparatus main body has the guide portion, the cartridge is guided to the guide portion when the cartridge is attached to the cartridge attachment portion. Therefore, the mounting operation of the cartridge with respect to the cartridge mounting portion can be facilitated.
　また、装置本体が規制部を有し、カートリッジが干渉部を有しているので、カートリッジが、装着軌跡と異なる軌跡で装置本体に挿入されると、干渉部と規制部とが接触し、カートリッジの装置本体に対するそれ以上の挿入が規制される。そのため、カートリッジの装置本体に対する誤った挿入を抑制できる。 In addition, since the apparatus main body has a restriction portion and the cartridge has an interference portion, when the cartridge is inserted into the device main body along a track different from the mounting locus, the interference portion and the restriction portion come into contact with each other. Further insertion into the device body is restricted. Therefore, erroneous insertion of the cartridge into the apparatus main body can be suppressed.
　また、カートリッジは、規制部と干渉部とが接触するときに、干渉部が規制部から離れる方向に移動することが、規制部材により規制されている。そのため、装着軌跡と異なる軌跡で装置本体に挿入されたときに、干渉部と規制部とを確実に接触させることができる。 Also, the cartridge is restricted by the restriction member from moving in a direction in which the interference part moves away from the restriction part when the restriction part and the interference part come into contact with each other. For this reason, the interference portion and the restriction portion can be reliably brought into contact with each other when inserted into the apparatus main body along a track different from the mounting track.
　従って、本発明の画像形成装置によれば、カートリッジのカートリッジ装着部に対する装着作業の円滑化を図ることができながら、カートリッジの装置本体に対する誤った挿入を抑制できる。
（２）また、ガイド部は、カートリッジをカートリッジ装着部に装着させるときに、カートリッジの軸線に沿う軸線方向の一方側である第１の側を、基準としてガイドするように構成されていてもよい。 Therefore, according to the image forming apparatus of the present invention, it is possible to suppress the erroneous insertion of the cartridge into the apparatus main body while facilitating the mounting operation of the cartridge with respect to the cartridge mounting portion.
(2) The guide portion may be configured to guide the first side, which is one side in the axial direction along the axis of the cartridge, as a reference when the cartridge is mounted on the cartridge mounting portion. .
　このような構成によれば、カートリッジがカートリッジ装着部に装着されるときに、ガイド部が、カートリッジの第１の側を基準としてガイドする。 According to such a configuration, when the cartridge is mounted on the cartridge mounting portion, the guide portion guides with reference to the first side of the cartridge.
　そのため、カートリッジがカートリッジ装着部に装着されるときに、ガイド部がカートリッジの第１の側を確実にガイドできるので、カートリッジの安定した装着動作を確保することができる。
（３）また、干渉部は、軸線方向における第１の側に設けられる第１干渉部と、軸線方向における第１の側と反対側の第２の側に設けられる第２干渉部と、を有していてもよい。この場合、第２干渉部の軸線方向長さは、第１干渉部の軸線方向長さよりも長く形成されている。 Therefore, when the cartridge is mounted on the cartridge mounting portion, the guide portion can reliably guide the first side of the cartridge, so that a stable mounting operation of the cartridge can be ensured.
(3) The interference unit includes a first interference unit provided on the first side in the axial direction, and a second interference unit provided on the second side opposite to the first side in the axial direction. You may have. In this case, the axial length of the second interference part is formed longer than the axial length of the first interference part.
　しかるに、カートリッジがカートリッジ装着部に装着されるときに、ガイド部が、カートリッジの第１の側を基準としてガイドすると、カートリッジの第１の側と反対側の第２の側には、カートリッジの第１の側と比較して、相対的に大きなガタつきが生じる場合がある。 However, when the guide portion is guided with respect to the first side of the cartridge when the cartridge is mounted on the cartridge mounting portion, the second side of the cartridge opposite to the first side of the cartridge is placed on the second side of the cartridge. Compared with the 1 side, a relatively large backlash may occur.
　この点、上記の構成によれば、第２干渉部の軸線方向長さが、第１干渉部の軸線方向長さよりも長く形成されているので、カートリッジがカートリッジ装着部に装着されるときに、カートリッジの第２の側に相対的に大きなガタつきが生じても、第２干渉部と規制部とを確実に接触させることができる。 In this regard, according to the above configuration, the axial length of the second interference portion is formed to be longer than the axial length of the first interference portion, so when the cartridge is mounted on the cartridge mounting portion, Even if a relatively large backlash occurs on the second side of the cartridge, the second interference portion and the restriction portion can be reliably brought into contact with each other.
　そのため、カートリッジの安定した装着動作を確保することができながら、カートリッジの装置本体に対する誤った挿入を確実に抑制できる。
（４）また、カートリッジは、回転体を収容するフレームを有していてもよい。この場合、第２干渉部は、フレームとは別部材として、フレームに支持されている。 Therefore, it is possible to reliably suppress erroneous insertion of the cartridge into the apparatus main body while ensuring stable mounting operation of the cartridge.
(4) The cartridge may have a frame that accommodates the rotating body. In this case, the second interference unit is supported by the frame as a separate member from the frame.
　しかるに、第２干渉部には、カートリッジがカートリッジ装着部に装着されるときに、カートリッジの第１の側と比較して、相対的に大きなガタつきが生じる場合がある。そのため、第２干渉部と規制部とが接触するときの衝撃は、第１干渉部と規制部とが接触するときの衝撃よりも大きくなる場合がある。 However, when the cartridge is mounted on the cartridge mounting portion, the second interference portion may have a relatively large backlash compared to the first side of the cartridge. Therefore, the impact when the second interference portion and the restriction portion contact each other may be greater than the impact when the first interference portion and the restriction portion contact each other.
　この点、上記の構成によれば、第２干渉部が、フレームとは別部材として、フレームに支持されているので、第２干渉部と規制部とが接触するときの衝撃が、回転体を収容するフレームに作用することを抑制でき、ひいては、回転体に作用することを抑制できる。そのため、フレームに対する回転体の位置精度が低下することを抑制できる。
（５）また、フレームは、回転体を回転可能に支持する第１フレームと、回転体を被覆するように、第１フレームに組み付けられる第２フレームとを有していてもよい。 In this regard, according to the above configuration, since the second interference unit is supported by the frame as a separate member from the frame, an impact when the second interference unit and the regulation unit come into contact with the rotating body. It can suppress acting on the frame to accommodate, and by extension, can suppress acting on a rotating body. Therefore, it can suppress that the positional accuracy of the rotary body with respect to a flame | frame falls.
(5) The frame may include a first frame that rotatably supports the rotating body and a second frame that is assembled to the first frame so as to cover the rotating body.
　第２フレームの第２の側の端部には、第２干渉部を支持する第２干渉部支持部が設けられていてもよい。この場合、第２干渉部支持部は、補強されている。 A second interference part support part that supports the second interference part may be provided at an end part on the second side of the second frame. In this case, the second interference portion support portion is reinforced.
　このような構成によれば、第２干渉部が第２干渉部支持部に設けられているので、第２干渉部と規制部との接触による衝撃は、第２干渉部を介して第２干渉部支持部に作用する。 According to such a configuration, since the second interference part is provided on the second interference part support part, the impact caused by the contact between the second interference part and the restricting part causes the second interference part to pass through the second interference part. Acts on the support section.
　この点、第２干渉部支持部は補強されているので、第２干渉部と規制部との接触による衝撃が第２干渉部支持部に作用しても、第２干渉部支持部が変形することを抑制できる。（６）また、第２フレームは、回転体の表面を帯電するように構成される帯電器を支持していてもよい。この場合、第１フレームの第１の側の端部には、第１干渉部を支持する第１干渉部支持部が設けられている。 In this respect, since the second interference part support part is reinforced, the second interference part support part is deformed even if an impact caused by contact between the second interference part and the restriction part acts on the second interference part support part. This can be suppressed. (6) The second frame may support a charger configured to charge the surface of the rotating body. In this case, a first interference portion support portion that supports the first interference portion is provided at an end portion on the first side of the first frame.
　このような構成によれば、第１干渉部が、第１フレームに設けられる第１干渉部支持部に支持されているので、第１干渉部と規制部とが接触したときの衝撃が、帯電器を支持する第２フレームに作用することを抑制できる。そのため、帯電器と回転体との相対的な位置精度が低下することを抑制できる。 According to such a configuration, since the first interference part is supported by the first interference part support part provided in the first frame, the impact when the first interference part and the regulation part come into contact is charged. It can suppress acting on the 2nd frame which supports a container. Therefore, it can suppress that the relative positional accuracy of a charger and a rotary body falls.
　一方、第２干渉部は、第２フレームに設けられる第２干渉部支持部に支持されているが、第２干渉部支持部が、補強され変形が抑制されているので、第２干渉部と規制部とが接触したときの衝撃により、帯電器と回転体との相対的な位置精度が低下することを抑制できる。
（７）また、第１フレームは、軸線方向に互いに間隔を隔てて対向配置される壁部を有していてもよい。この場合、第２の側に配置される壁部は、第１の側に配置される壁部よりも、剛性が大きくなるように構成されている。 On the other hand, the second interference part is supported by the second interference part support part provided in the second frame. However, since the second interference part support part is reinforced and the deformation is suppressed, It can suppress that the relative positional accuracy of a charger and a rotary body falls by the impact when a control part contacts.
(7) Moreover, the 1st flame | frame may have the wall part arrange | positioned opposingly at intervals in the axial direction. In this case, the wall part arrange | positioned at the 2nd side is comprised so that rigidity may become larger than the wall part arrange | positioned at the 1st side.
　このような構成によれば、第１の側に配置される壁部と比較して、第２干渉部の近傍に配置される第２の側に配置される壁部が、第１の側に配置される壁部よりも、剛性が大きくなるように構成されている。 According to such a structure, compared with the wall part arrange | positioned at the 1st side, the wall part arrange | positioned at the 2nd side arrange | positioned in the vicinity of the 2nd interference part is on the 1st side. It is comprised so that rigidity may become larger than the wall part arrange | positioned.
　そのため、第２干渉部と規制部とが接触するときの衝撃が、第２の側に配置される壁部に作用しても、第２の側に配置される壁部が変形することを抑制できる。その結果、フレームに対する回転体の位置精度が低下することを確実に抑制できる。
（８）また、カートリッジは、ガイド部にガイドされる第１被ガイド部を有していてもよい。この場合、装置本体は、規制部と干渉部とが接触するとき、第１被ガイド部と当接し、干渉部が規制部から離れる方向にカートリッジが移動することを規制する当接部を有している。 Therefore, even if the impact when the second interference part and the restricting part contact each other acts on the wall part arranged on the second side, the wall part arranged on the second side is prevented from being deformed. it can. As a result, it is possible to reliably suppress a decrease in the positional accuracy of the rotating body with respect to the frame.
(8) Further, the cartridge may have a first guided portion guided by the guide portion. In this case, the apparatus main body has an abutting portion that abuts the first guided portion when the restricting portion and the interference portion come into contact with each other, and restricts the cartridge from moving in a direction away from the restricting portion. ing.
　このような構成によれば、カートリッジがカートリッジ装着部に対して装着されるときに、第１被ガイド部がガイド部にガイドされるので、カートリッジのカートリッジ装着部に対する円滑な装着作業を確実に確保することができる。 According to such a configuration, when the cartridge is mounted on the cartridge mounting portion, the first guided portion is guided by the guide portion, so that the smooth mounting operation of the cartridge to the cartridge mounting portion is reliably ensured. can do.
　また、規制部と干渉部とが接触するとき、カートリッジの第１被ガイド部が、装置本体の当接部と当接するので、カートリッジが、干渉部が規制部から離れるように移動することを確実に規制できる。
（９）また、装置本体には、カートリッジを着脱するための開口部が形成されていてもよい。この場合、当接部は、開口部を介して、装着方向の上流側から露出している。 Further, when the restricting portion and the interference portion come into contact with each other, the first guided portion of the cartridge comes into contact with the contact portion of the apparatus main body, so that it is ensured that the cartridge moves so that the interference portion moves away from the restricting portion. Can be regulated.
(9) Further, an opening for attaching and detaching the cartridge may be formed in the apparatus main body. In this case, the contact portion is exposed from the upstream side in the mounting direction through the opening.
　このような構成によれば、当接部が、開口部を介して、装着方向の上流側から露出しているので、規制部と干渉部とが接触したとき、当接部に当接する第１被ガイド部が、開口部を介して、装着方向の上流側から露出される。 According to such a configuration, since the contact portion is exposed from the upstream side in the mounting direction through the opening, the first portion that contacts the contact portion when the restricting portion and the interference portion come into contact with each other. The guided portion is exposed from the upstream side in the mounting direction through the opening.
　そのため、ユーザは、第１被ガイド部と当接部とが当接していることを容易に確認でき、カートリッジが、装着軌跡と異なる軌跡で装置本体に挿入されていることを容易に把握できる。
（１０）また、干渉部は、カートリッジにおいて、カートリッジの装着方向の下流側部分に設けられていてもよい。 Therefore, the user can easily confirm that the first guided portion and the contact portion are in contact with each other, and can easily grasp that the cartridge is inserted into the apparatus main body along a track different from the mounting track.
(10) Moreover, the interference part may be provided in the downstream part of the mounting direction of the cartridge in the cartridge.
　このような構成によれば、カートリッジの装着方向の下流側部分が、装着軌跡と異なる軌跡で、装置本体に挿入されると、干渉部と規制部とが接触し、カートリッジのそれ以上の挿入が規制される。 According to such a configuration, when the downstream portion in the mounting direction of the cartridge is inserted into the apparatus main body along a trajectory different from the mounting trajectory, the interference portion and the regulating portion come into contact, and further insertion of the cartridge is prevented. Be regulated.
　つまり、干渉部が、カートリッジの装着方向の上流側部分に設けられている場合と比較して、カートリッジの装置本体に対する誤った挿入時において、早期に、カートリッジの移動を規制できる。
（１１）また、カートリッジは、カートリッジ装着部に着脱されるときに把持される把持部を有していてもよい。把持部は、規制部と干渉部とが接触するとき、開口部から、装着方向の上流側に向かって突出していてもよい。 That is, the movement of the cartridge can be regulated at an early stage when the cartridge is erroneously inserted into the apparatus main body, as compared with the case where the interference portion is provided in the upstream portion of the cartridge mounting direction.
(11) Further, the cartridge may have a gripping part that is gripped when being attached to and detached from the cartridge mounting part. The gripping part may protrude from the opening part toward the upstream side in the mounting direction when the restricting part and the interference part come into contact with each other.
　このような構成によれば、カートリッジがカートリッジ装着部に着脱されるときに、把持部が把持されるので、カートリッジのカートリッジ装着部に対する着脱作業の円滑化を図ることができる。 According to such a configuration, the gripping part is gripped when the cartridge is attached to and detached from the cartridge mounting part, so that the attaching / detaching operation of the cartridge to the cartridge mounting part can be facilitated.
　また、把持部は、規制部と干渉部とが接触したとき、開口部から、装着方向の上流側に向かって突出しているので、把持部を把持することにより、規制部と干渉部とが接触した状態のカートリッジを、装置本体から容易に離脱させることができる。
（１２）また、装置本体は、開口部を開放する開放位置と、開口部を閉鎖する閉鎖位置とに移動するように構成される開閉部材を有していてもよい。この場合、開閉部材は、規制部と干渉部とが接触するとき、開放位置から閉鎖位置への移動が規制されるように構成されている。 Further, since the gripping part protrudes from the opening toward the upstream side in the mounting direction when the restricting part and the interference part come into contact, the restricting part and the interference part come into contact with each other by gripping the gripping part. The cartridge in such a state can be easily detached from the apparatus main body.
(12) The apparatus main body may have an opening / closing member configured to move to an open position where the opening is opened and a closed position where the opening is closed. In this case, the opening / closing member is configured such that the movement from the open position to the closed position is restricted when the restricting portion and the interference portion come into contact with each other.
　このような構成によれば、規制部と干渉部とが接触するとき、開閉部材の開放位置から閉鎖位置への移動が規制されるので、カートリッジが誤って装置本体に挿入されている状態で、開閉部材が閉鎖位置に配置されることを抑制できる。
（１３）また、開閉部材には、開放位置から閉鎖位置に向けて移動するときに、規制部と干渉部との接触により装着方向の下流側への移動が規制される規制位置に配置されるカートリッジの把持部を、第１被ガイド部がガイド部に向かうように押圧する押圧部を有していてもよい。この場合、カートリッジは、把持部が押圧部に押圧されることにより、規制位置から、第１被ガイド部がガイド部にガイドされるガイド位置に移動されるように構成されている。 According to such a configuration, when the restricting portion and the interference portion come into contact with each other, since the movement of the opening / closing member from the open position to the closed position is restricted, the cartridge is erroneously inserted into the apparatus main body, It can suppress that an opening-and-closing member is arrange | positioned in a closed position.
(13) Further, the opening / closing member is disposed at a restriction position where movement to the downstream side in the mounting direction is restricted by contact between the restriction part and the interference part when moving from the open position to the closed position. You may have a press part which presses the holding part of a cartridge so that a 1st to-be-guided part may go to a guide part. In this case, the cartridge is configured to move from the restriction position to the guide position where the first guided portion is guided by the guide portion when the grip portion is pressed by the pressing portion.
　このような構成によれば、開閉部材を、開放位置から閉鎖位置に向けて移動させると、押圧部がカートリッジの把持部を押圧し、第１被ガイド部がガイド部に向かって移動される。これにより、カートリッジが、規制位置からガイド位置に向かって移動される。 According to such a configuration, when the opening / closing member is moved from the open position toward the closed position, the pressing portion presses the grip portion of the cartridge, and the first guided portion is moved toward the guide portion. Thereby, the cartridge is moved from the restriction position toward the guide position.
　そのため、規制位置にあるカートリッジを、一旦装置本体から離脱させた後、再度、カートリッジを装置本体に挿入する必要がなく、開閉部材を開放位置から閉鎖位置に移動させることにより、カートリッジを、規制位置からガイド位置に移動できる。 Therefore, after the cartridge in the restricting position is once removed from the apparatus main body, it is not necessary to insert the cartridge into the apparatus main body again, and by moving the opening / closing member from the open position to the closed position, the cartridge is To the guide position.
　その結果、カートリッジを誤って装置本体に挿入しても、離脱させることなく、カートリッジを、規制位置からガイド位置に移動できる。従って、カートリッジのカートリッジ装着部に対する着脱作業のより一層の円滑化を図ることができる。
（１４）また、把持部は、押圧部に押圧されたときに、カートリッジを規制位置からガイド位置に向かって移動させる案内面を有してもよい。 As a result, even if the cartridge is erroneously inserted into the apparatus main body, the cartridge can be moved from the restricting position to the guide position without being removed. Accordingly, it is possible to further facilitate the attaching / detaching operation of the cartridge with respect to the cartridge mounting portion.
(14) The grip portion may have a guide surface that moves the cartridge from the restriction position toward the guide position when pressed by the pressing portion.
　このような構成によれば、把持部が案内面を有しているので、押圧部が把持部を押圧したときに、案内面が、カートリッジを規制位置からガイド位置に向かって確実に移動させることができる。
（１５）また、第１被ガイド部は、軸線に沿う軸線方向に延びる略円柱形状に形成されていてもよい。 According to such a configuration, since the grip portion has the guide surface, the guide surface reliably moves the cartridge from the restriction position toward the guide position when the pressing portion presses the grip portion. Can do.
(15) Moreover, the 1st to-be-guided part may be formed in the substantially cylindrical shape extended in the axial direction along an axis.
　このような構成によれば、第１被ガイド部が略円柱形状に形成されているので、押圧部が把持部を押圧し、第１被ガイド部がガイド部に向かって移動されたときに、第１被ガイド部の円滑な移動を確保することができる。 According to such a configuration, since the first guided portion is formed in a substantially cylindrical shape, when the pressing portion presses the gripping portion and the first guided portion is moved toward the guide portion, Smooth movement of the first guided portion can be ensured.
　そのため、開閉部材を開放位置から閉鎖位置に移動させたときに、カートリッジの規制位置からガイド位置への円滑な移動を確保できる。
（１６）また、カートリッジは、第１被ガイド部に対して、カートリッジの装着方向の下流側に設けられる第２被ガイド部を有していてもよい。ガイド部は、第１被ガイド部をガイドするように構成される第１ガイド部と、第２被ガイド部をガイドするように構成される第２ガイド部とを有していてもよい。この場合、干渉部は、第２被ガイド部の近傍に配置されている。 Therefore, when the opening / closing member is moved from the open position to the closed position, smooth movement of the cartridge from the restriction position to the guide position can be ensured.
(16) The cartridge may have a second guided portion provided on the downstream side in the cartridge mounting direction with respect to the first guided portion. The guide part may have a first guide part configured to guide the first guided part and a second guide part configured to guide the second guided part. In this case, the interference part is disposed in the vicinity of the second guided part.
　このような構成によれば、カートリッジが、カートリッジ装着部に装着されるときに、第１被ガイド部が第１ガイド部にガイドされ、第２被ガイド部が第２ガイド部にガイドされる。そのため、カートリッジのカートリッジ装着部に対する装着作業のより一層の円滑化を図ることができる。 According to such a configuration, when the cartridge is mounted on the cartridge mounting portion, the first guided portion is guided by the first guide portion, and the second guided portion is guided by the second guide portion. Therefore, it is possible to further facilitate the mounting operation of the cartridge with respect to the cartridge mounting portion.
　また、規制部に接触する干渉部と、第２ガイド部にガイドされる第２被ガイド部とが互いに近傍に配置されているので、干渉部と第２被ガイド部との相対的な位置関係を一定に保つことができる。 Moreover, since the interference part which contacts a control part and the 2nd guided part guided by the 2nd guide part are arrange | positioned in the vicinity, relative positional relationship of an interference part and a 2nd guided part Can be kept constant.
　そのため、カートリッジが装着軌跡と異なる軌跡で装置本体に挿入され、かつ、第２被ガイド部が第２ガイド部にガイドされるとき、例えば、第２被ガイド部が第２ガイド部にガイドされる一方、第１被ガイド部が第１ガイド部にガイドされていないときに、干渉部と規制部とをより一層確実に接触させることができる。
（１７）また、干渉部は、規制部をカートリッジの装着方向の上流側から受け入れるように構成されていてもよい。 Therefore, when the cartridge is inserted into the apparatus main body along a trajectory different from the mounting trajectory and the second guided portion is guided by the second guide portion, for example, the second guided portion is guided by the second guide portion. On the other hand, when the first guided portion is not guided by the first guide portion, the interference portion and the restricting portion can be more reliably brought into contact with each other.
(17) Further, the interference unit may be configured to receive the regulating unit from the upstream side in the cartridge mounting direction.
　このような構成によれば、カートリッジが装着軌跡と異なる軌跡で装置本体に挿入され、干渉部と規制部と接触したときに、干渉部が規制部を装着方向の上流側から受け入れるので、干渉部と規制部とを確実に係合させることができる。 According to such a configuration, when the cartridge is inserted into the apparatus main body along a trajectory different from the mounting trajectory and comes into contact with the interference portion and the restriction portion, the interference portion receives the restriction portion from the upstream side in the mounting direction. And the restricting portion can be reliably engaged.
　そのため、装着軌跡と異なる軌跡において、カートリッジが装置本体に挿入されたときに、カートリッジの装置本体に対するそれ以上の挿入を確実に規制できる。 Therefore, when the cartridge is inserted into the apparatus main body in a different track from the mounting locus, further insertion of the cartridge into the device main body can be reliably controlled.
　本発明の画像形成装置によれば、カートリッジの装置本体に対する誤った挿入を確実に抑制できる。 According to the image forming apparatus of the present invention, erroneous insertion of the cartridge into the apparatus main body can be reliably suppressed.
図１は、本発明の画像形成装置の一実施形態としてのプリンタの中央断面図を示す。FIG. 1 is a central sectional view of a printer as an embodiment of the image forming apparatus of the present invention. 図２は、図１に示すプロセスカートリッジを左上側から見た斜視図を示す。FIG. 2 is a perspective view of the process cartridge shown in FIG. 1 as viewed from the upper left side. 図３は、図２に示すプロセスカートリッジを右上側から見た斜視図を示す。FIG. 3 is a perspective view of the process cartridge shown in FIG. 2 as viewed from the upper right side. 図４は、図３に示すプロセスカートリッジを前上側から見た斜視図を示す。FIG. 4 is a perspective view of the process cartridge shown in FIG. 3 as viewed from the front upper side. 図５は、図１に示すプリンタを右上側から見た斜視図であって、プロセスカートリッジが装着位置にある状態を示す。FIG. 5 is a perspective view of the printer shown in FIG. 1 as viewed from the upper right side, and shows a state where the process cartridge is in the mounting position. 図６は、図１に示すプリンタを右上側から見た斜視図であって、プロセスカートリッジが規制位置にある状態を示す。FIG. 6 is a perspective view of the printer shown in FIG. 1 as viewed from the upper right side, and shows a state in which the process cartridge is in the restriction position. 図７は、図６に示すプリンタの平面図を示す。FIG. 7 is a plan view of the printer shown in FIG. 図８は、図７に示すプリンタのＡ－Ａ断面図である。FIG. 8 is a cross-sectional view of the printer shown in FIG. 図９は、図７に示すプリンタのＢ－Ｂ断面図であって、プロセスカートリッジが規制位置にある状態を示す。FIG. 9 is a cross-sectional view taken along the line BB of the printer shown in FIG. 7 and shows a state where the process cartridge is in the restriction position. 図１０は、図８に示すプロセスカートリッジの移動状態を説明するためのプリンタのＢ－Ｂ断面図であって、プロセスカートリッジが規制位置からガイド位置への移動途中にある状態を示す。FIG. 10 is a cross-sectional view taken along the line BB of the printer for explaining the movement state of the process cartridge shown in FIG. 8, and shows a state where the process cartridge is in the process of moving from the restricting position to the guide position. 図１１は、図１０に続いて、プロセスカートリッジの移動状態を説明するためのプリンタのＢ－Ｂ断面図であって、プロセスカートリッジがガイド位置にある状態を示す。FIG. 11 is a cross-sectional view taken along the line BB of the printer for explaining the movement state of the process cartridge following FIG. 10 and shows the state where the process cartridge is in the guide position. 図１２は、図７に示すプリンタのＣ－Ｃ断面図であって、プロセスカートリッジが規制位置にある状態を示す。FIG. 12 is a cross-sectional view taken along the line CC of the printer shown in FIG. 7 and shows a state where the process cartridge is in the restricting position. 図１３は、図１２に示すプロセスカートリッジの移動状態を説明するためのプリンタのＣ－Ｃ断面図であって、プロセスカートリッジが規制位置からガイド位置への移動途中にある状態を示す。FIG. 13 is a cross-sectional view taken along the line CC of the printer for explaining the movement state of the process cartridge shown in FIG. 12, and shows a state where the process cartridge is in the process of moving from the restricting position to the guide position. 図１４は、図１３に続いて、プロセスカートリッジの移動状態を説明するためのプリンタのＣ－Ｃ断面図であって、プロセスカートリッジがガイド位置にある状態を示す。FIG. 14 is a cross-sectional view taken along the line CC of FIG. 13 for explaining the movement state of the process cartridge, and shows the state where the process cartridge is in the guide position.
１．プリンタの全体構成
　画像形成装置の一例としてのプリンタ１は、図１に示すように、装置本体の一例としての本体ケーシング２を備えている。 1. Overall Configuration of Printer As shown in FIG. 1, a printer 1 as an example of an image forming apparatus includes a main body casing 2 as an example of an apparatus main body.
　本体ケーシング２は、略ボックス形状に形成され、その内部空間に、記録媒体の一例としての用紙Ｐを給紙するように構成される給紙部３と、給紙された用紙Ｐに画像を形成するように構成される画像形成部４とを収容している。 The main casing 2 is formed in a substantially box shape, and forms an image on the fed paper P and a paper feeding unit 3 configured to feed the paper P as an example of a recording medium in the internal space thereof. The image forming unit 4 configured to do so is accommodated.
　なお、以下の説明において、方向について言及する場合には、プリンタ１を水平に載置した状態を基準として、図１における紙面左側を後側とし、図１における紙面右側を前側とする。また、プリンタ１を前側から見たときを左右の基準とし、図１の紙面手側を左側とし、紙面奥側を右側とする。また、図１の紙面上側を上側とし、紙面下側を下側とする。 In the following description, when referring to the direction, the left side of the paper in FIG. 1 is the rear side and the right side of the paper in FIG. 1 is the front side, based on the state where the printer 1 is placed horizontally. Further, when the printer 1 is viewed from the front side, the left and right sides are used as a reference, the paper side in FIG. 1 is the left side, and the back side is the right side. Further, the upper side of the drawing in FIG. 1 is the upper side, and the lower side of the drawing is the lower side.
　なお、左右方向が軸線方向の一例であり、左側が軸線方向の一方側である第１の側であり、右側が軸線方向の他方側である第２の側である。また、上下方向が、軸線方向と直交する直交方向の一例であり、下側が直交方向の一方側であり、上側が直交方向の他方側である。
（１）本体ケーシング
　本体ケーシング２には、開口部の一例としてのカートリッジ開口部５と、用紙開口部６とが形成されている。 The left-right direction is an example of the axial direction, the left side is a first side that is one side in the axial direction, and the right side is a second side that is the other side in the axial direction. The up-down direction is an example of an orthogonal direction orthogonal to the axial direction, the lower side is one side of the orthogonal direction, and the upper side is the other side of the orthogonal direction.
(1) Main Body Casing The main body casing 2 is formed with a cartridge opening 5 as an example of an opening and a paper opening 6.
　カートリッジ開口部５は、後述するプロセスカートリッジ１５を着脱するために形成され、本体ケーシング２の上端部において、上下方向に貫通形成されている。用紙開口部６は、用紙Ｐを導入するために形成され、本体ケーシング２の前端部における下端部において、前後方向に貫通形成されている。 The cartridge opening 5 is formed to attach and detach a process cartridge 15 to be described later, and is formed through the upper end of the main casing 2 in the vertical direction. The paper opening 6 is formed to introduce the paper P, and is formed through the front end of the main casing 2 in the front-rear direction.
　また、本体ケーシング２には、その上端部に、開閉部材の一例としてのトップカバー７が設けられ、その前端部に、給紙カバー８が設けられている。 Further, the main casing 2 is provided with a top cover 7 as an example of an opening / closing member at the upper end, and a paper feed cover 8 at the front end.
　トップカバー７は、前後方向に延びるように形成され、その下面における前後方向略中央部分に、押圧部１０が設けられている。 The top cover 7 is formed so as to extend in the front-rear direction, and a pressing portion 10 is provided at a substantially central portion in the front-rear direction on the lower surface thereof.
　押圧部１０は、後述する被押圧部７８に対応して複数、具体的には、図５に示すように、左右方向に互いに間隔を隔てて、２つ設けられている。また、押圧部１０は、図１に示すように、トップカバー７の下面から下方に向かって突出する側面視略矩形状に形成され、左右方向に延びるように形成されている。 A plurality of pressing portions 10 are provided corresponding to the pressed portions 78 described later, specifically, as shown in FIG. 5, two are provided at intervals in the left-right direction. Further, as shown in FIG. 1, the pressing portion 10 is formed in a substantially rectangular shape in a side view protruding downward from the lower surface of the top cover 7 and extends in the left-right direction.
　また、押圧部１０の前面における下側部分は、傾斜面４３として区画されている。傾斜面４３は、押圧部１０の前面における上下方向略中央から下方に向かうに従って後方に傾斜するように形成されている。 Further, the lower part of the front surface of the pressing portion 10 is partitioned as an inclined surface 43. The inclined surface 43 is formed so as to incline backward as it goes downward from the substantially vertical center of the front surface of the pressing portion 10.
　そして、トップカバー７は、その後端部を支点として、カートリッジ開口部５を閉鎖する閉鎖位置と、図５に示すように、カートリッジ開口部５を開放する開放位置とに揺動可能に設けられている。 The top cover 7 is swingably provided with the rear end portion as a fulcrum, in a closed position for closing the cartridge opening 5 and an open position for opening the cartridge opening 5 as shown in FIG. Yes.
　給紙カバー８は、図１に示すように、その下端部を支点として、用紙開口部６を閉鎖する閉鎖位置と、用紙開口部６を開放する開放位置とに揺動可能に設けられている。なお、図１において、閉鎖位置に配置されるトップカバー７および給紙カバー８のそれぞれを実線にて示し、閉鎖位置と開放位置との間に配置されるトップカバー７および給紙カバー８のそれぞれを仮想線にて示す。
（２）給紙部
　給紙部３は、本体ケーシング２の底部に設けられる用紙載置部９を備えている。用紙載置部９は、用紙開口部６を介して、本体ケーシング２の外部と連通されている。 As shown in FIG. 1, the paper feed cover 8 is swingably provided between a closed position for closing the paper opening 6 and an open position for opening the paper opening 6 with the lower end portion as a fulcrum. . In FIG. 1, each of the top cover 7 and the paper feed cover 8 arranged at the closed position is indicated by a solid line, and each of the top cover 7 and the paper feed cover 8 arranged between the closed position and the open position is shown. Is indicated by a virtual line.
(2) Paper Feed Unit The paper feed unit 3 includes a paper placement unit 9 provided at the bottom of the main casing 2. The paper placing portion 9 is communicated with the outside of the main body casing 2 through the paper opening 6.
　そして、用紙Ｐは、給紙カバー８が開放位置に配置された状態において、その前側部分が給紙カバー８の上面にスタックされるとともに、その後側部分が用紙開口部６を介して用紙載置部９内にスタックされる。
（３）画像形成部
　画像形成部４は、カートリッジの一例としてのプロセスカートリッジ１５と、スキャナユニット１６と、定着ユニット１７とを備えている。 The front side portion of the paper P is stacked on the upper surface of the paper feed cover 8 and the rear side portion of the paper P is placed through the paper opening 6 in a state where the paper feed cover 8 is disposed at the open position. Stacked in the unit 9.
(3) Image Forming Unit The image forming unit 4 includes a process cartridge 15 as an example of a cartridge, a scanner unit 16, and a fixing unit 17.
　プロセスカートリッジ１５は、本体ケーシング２に対して着脱可能に構成され、給紙部３の後側部分の上側において本体ケーシング２に装着されている。プロセスカートリッジ１５は、本体ケーシング２に対して着脱可能に構成されるドラムカートリッジ１８と、ドラムカートリッジ１８に着脱可能に装着される現像カートリッジ１９とを備えている。 The process cartridge 15 is configured to be detachable from the main casing 2 and is mounted on the main casing 2 above the rear portion of the paper feed unit 3. The process cartridge 15 includes a drum cartridge 18 that is detachably attached to the main body casing 2 and a developing cartridge 19 that is detachably attached to the drum cartridge 18.
　ドラムカートリッジ１８は、回転体の一例としての感光ドラム２０と、転写ローラ２１と、スコロトロン型帯電器２２とを備えている。 The drum cartridge 18 includes a photosensitive drum 20 as an example of a rotating body, a transfer roller 21, and a scorotron charger 22.
　感光ドラム２０は、ドラムカートリッジ１８の後側部分に回転可能に設けられている。 The photosensitive drum 20 is rotatably provided on the rear side portion of the drum cartridge 18.
　転写ローラ２１は、感光ドラム２０に対して後側から圧接するように、感光ドラム２０の後側に配置され、ドラムカートリッジ１８に回転可能に設けられている。 The transfer roller 21 is disposed on the rear side of the photosensitive drum 20 so as to be in pressure contact with the photosensitive drum 20 from the rear side, and is rotatably provided on the drum cartridge 18.
　スコロトロン型帯電器２２は、感光ドラム２０の前上側に間隔を隔てて対向配置されている。 The scorotron charger 22 is disposed opposite to the front upper side of the photosensitive drum 20 with an interval.
　現像カートリッジ１９は、感光ドラム２０の前下側に配置されている。また、現像カートリッジ１９は、現像フレーム２５を備えている。 The developing cartridge 19 is disposed on the front lower side of the photosensitive drum 20. Further, the developing cartridge 19 includes a developing frame 25.
　現像フレーム２５は、左右方向に延びる略ボックス形状に形成されており、その後端部が後方に向かって開放されている。また、現像フレーム２５内には、トナー収容室２６と現像室２７とが前後方向に並列して区画されている。トナー収容室２６と現像室２７とは、連通口２８により連通されている。 The developing frame 25 is formed in a substantially box shape extending in the left-right direction, and a rear end portion thereof is opened rearward. In the developing frame 25, a toner storage chamber 26 and a developing chamber 27 are partitioned in parallel in the front-rear direction. The toner storage chamber 26 and the developing chamber 27 are communicated with each other through a communication port 28.
　トナー収容室２６には、現像剤の一例としてのトナーが収容され、その前後上下方向略中央部分には、アジテータ２９が設けられている。 The toner storage chamber 26 stores toner as an example of a developer, and an agitator 29 is provided at a substantially central portion in the front-rear and vertical directions.
　また、現像室２７には、現像ローラ３４と、供給ローラ３３と、層厚規制ブレード３５とが設けられている。 Further, the developing chamber 27 is provided with a developing roller 34, a supply roller 33, and a layer thickness regulating blade 35.
　現像ローラ３４は、左右方向に延びる現像ローラ軸５２と、その両端部が露出するように現像ローラ軸５２を被覆するゴムローラ４８とを備えている。現像ローラ３４は、ゴムローラ４８が後側および上側から露出し、感光ドラム２０に対して前下側から接触するように、現像室２７の後端部に配置されている。また、現像ローラ３４は、現像ローラ軸５２の両端部が、現像フレーム２５の左右両側壁に回転可能に支持されることによって、現像フレーム２５に支持されている。現像ローラ軸５２の両端部は、現像フレーム２５の左右両側壁から左右方向外方に向かって突出している。なお、現像ローラ軸５２の両端部のそれぞれには、図２および図３に示すように、略円筒形状に形成されるカラー部材４９が設けられている。カラー部材４９は、現像ローラ軸５２の両端部のそれぞれを径方向外側から被覆している。 The developing roller 34 includes a developing roller shaft 52 extending in the left-right direction, and a rubber roller 48 that covers the developing roller shaft 52 so that both ends thereof are exposed. The developing roller 34 is disposed at the rear end portion of the developing chamber 27 such that the rubber roller 48 is exposed from the rear side and the upper side and is in contact with the photosensitive drum 20 from the front lower side. Further, the developing roller 34 is supported by the developing frame 25 by rotatably supporting both ends of the developing roller shaft 52 on the left and right side walls of the developing frame 25. Both end portions of the developing roller shaft 52 protrude from the left and right side walls of the developing frame 25 outward in the left-right direction. As shown in FIGS. 2 and 3, color members 49 formed in a substantially cylindrical shape are provided at both ends of the developing roller shaft 52, respectively. The color member 49 covers both ends of the developing roller shaft 52 from the radially outer side.
　供給ローラ３３は、図１に示すように、左右方向に延びる供給ローラ軸５０と、その両端部が露出するように供給ローラ軸５０を被覆するスポンジローラ５１とを備えている。 As shown in FIG. 1, the supply roller 33 includes a supply roller shaft 50 extending in the left-right direction, and a sponge roller 51 that covers the supply roller shaft 50 so that both ends thereof are exposed.
　供給ローラ３３は、スポンジローラ５１がゴムローラ４８に前下側から圧接するように配置されるとともに、供給ローラ軸５０の両端部が、現像フレーム２５の左右両側壁に回転可能に支持されることによって、現像フレーム２５に支持されている。 The supply roller 33 is disposed so that the sponge roller 51 is in pressure contact with the rubber roller 48 from the front lower side, and both ends of the supply roller shaft 50 are rotatably supported on the left and right side walls of the developing frame 25. The development frame 25 is supported.
　層厚規制ブレード３５は、現像ローラ３４に前側から接触するように、現像フレーム２５に支持されている。 The layer thickness regulating blade 35 is supported by the developing frame 25 so as to contact the developing roller 34 from the front side.
　スキャナユニット１６は、本体ケーシング２内において、プロセスカートリッジ１５の前側に配置されている。スキャナユニット１６は、感光ドラム２０に向けて、画像データに基づくレーザービームＬを出射し、感光ドラム２０の周面を露光する。 The scanner unit 16 is disposed in front of the process cartridge 15 in the main body casing 2. The scanner unit 16 emits a laser beam L based on image data toward the photosensitive drum 20 to expose the peripheral surface of the photosensitive drum 20.
　定着ユニット１７は、本体ケーシング２内において、ドラムカートリッジ１８の後側部分の上側に配置されている。定着ユニット１７は、加熱ローラ３８と、加熱ローラ３８に対して後上側から圧接する加圧ローラ３９とを備えている。
（４）画像形成動作
　現像カートリッジ１９のトナー収容室２６内のトナーは、アジテータ２９の回転により、連通口２８を介して、供給ローラ３３に供給され、さらに、現像ローラ３４に供給され、供給ローラ３３と現像ローラ３４との間で正極性に摩擦帯電される。 The fixing unit 17 is disposed above the rear portion of the drum cartridge 18 in the main body casing 2. The fixing unit 17 includes a heating roller 38 and a pressure roller 39 that presses against the heating roller 38 from the upper rear side.
(4) Image Forming Operation The toner in the toner storage chamber 26 of the developing cartridge 19 is supplied to the supply roller 33 through the communication port 28 by the rotation of the agitator 29, and further supplied to the developing roller 34. Between 33 and the developing roller 34, it is triboelectrically charged to the positive polarity.
　現像ローラ３４に供給されたトナーは、現像ローラ３４の回転に伴って、層厚規制ブレード３５によって厚さが規制され、一定厚さの薄層として現像ローラ３４の表面に担持される。 The toner supplied to the developing roller 34 is regulated by the layer thickness regulating blade 35 as the developing roller 34 rotates, and is carried on the surface of the developing roller 34 as a thin layer having a constant thickness.
　一方、感光ドラム２０の表面は、スコロトロン型帯電器２２によって一様に帯電された後、スキャナユニット１６によって露光される。これにより、感光ドラム２０の周面には、画像データに基づく静電潜像が形成される。そして、現像ローラ３４に担持されるトナーが感光ドラム２０の周面上の静電潜像に供給されることにより、感光ドラム２０の周面上にトナー像が担持される。 On the other hand, the surface of the photosensitive drum 20 is uniformly charged by the scorotron charger 22 and then exposed by the scanner unit 16. Thereby, an electrostatic latent image based on the image data is formed on the peripheral surface of the photosensitive drum 20. The toner carried on the developing roller 34 is supplied to the electrostatic latent image on the circumferential surface of the photosensitive drum 20, whereby the toner image is carried on the circumferential surface of the photosensitive drum 20.
　用紙載置部９にスタックされた用紙Ｐは、ピックアップローラ１１の回転により、給紙ローラ１２と給紙パッド１３との間に送られ、給紙ローラ１２の回転により１枚ずつ捌かれる。その後、捌かれた用紙Ｐは、給紙ローラ１２の回転により、上下方向に延びる給紙パス１４に搬送されて、所定のタイミングで１枚ずつ、感光ドラム２０と転写ローラ２１との間に給紙される。そして、用紙Ｐには、感光ドラム２０と転写ローラ２１との間を通過するときに、トナー像が転写され、画像が形成される。 The paper P stacked on the paper placement unit 9 is sent between the paper feed roller 12 and the paper feed pad 13 by the rotation of the pickup roller 11, and is fed one by one by the rotation of the paper feed roller 12. Thereafter, the sheet P is conveyed to the sheet feeding path 14 extending in the vertical direction by the rotation of the sheet feeding roller 12, and is fed between the photosensitive drum 20 and the transfer roller 21 one by one at a predetermined timing. Paper. Then, when passing between the photosensitive drum 20 and the transfer roller 21, the toner image is transferred to the paper P to form an image.
　続いて、用紙Ｐは、加熱ローラ３８と加圧ローラ３９との間を通過するときに加熱および加圧される。このとき、用紙Ｐには、画像が熱定着される。その後、用紙Ｐは、１対の排紙ローラ４０の間に向けて搬送され、排紙ローラ４０によって、トップカバー７の上面に形成される排紙トレイ４１上に排紙される。 Subsequently, the paper P is heated and pressed when it passes between the heating roller 38 and the pressure roller 39. At this time, the image is thermally fixed on the paper P. Thereafter, the paper P is conveyed toward the pair of paper discharge rollers 40 and is discharged onto a paper discharge tray 41 formed on the upper surface of the top cover 7 by the paper discharge rollers 40.
　このように用紙Ｐは、用紙載置部９から給紙され、感光ドラム２０と転写ローラ２１との間を通過し、次いで、加熱ローラ３８と加圧ローラ３９との間を通過した後、排紙トレイ４１に排紙されるように、側面視略Ｃ字状の搬送パスを搬送される。
２．プロセスカートリッジの詳細
　プロセスカートリッジ１５は、上記し、図２および図３に示すように、ドラムカートリッジ１８と、現像カートリッジ１９とを備えている。 In this way, the paper P is fed from the paper placement unit 9, passes between the photosensitive drum 20 and the transfer roller 21, then passes between the heating roller 38 and the pressure roller 39, and then discharged. The paper is transported through a substantially C-shaped transport path in a side view so that the paper is discharged onto the paper tray 41.
2. Details of Process Cartridge The process cartridge 15 includes the drum cartridge 18 and the developing cartridge 19 as described above and shown in FIGS.
　なお、以下のプロセスカートリッジ１５の説明において、方向について言及するときには、感光ドラム２０が配置されている側をプロセスカートリッジ１５の後側とし、スコロトロン型帯電器２２が配置されている側を上側とする。すなわち、プロセスカートリッジ１５に関する上下前後方向は、プリンタ１に関する上下前後方向と異なり、プロセスカートリッジ１５は、その前側がプリンタ１の前下側、その後側がプリンタ１の後上側となるように、プリンタ１に装着されている。 In the following description of the process cartridge 15, when referring to the direction, the side on which the photosensitive drum 20 is disposed is the rear side of the process cartridge 15, and the side on which the scorotron charger 22 is disposed is the upper side. . That is, the up / down / front / rear direction with respect to the process cartridge 15 is different from the up / down / front / rear direction with respect to the printer 1, and the process cartridge 15 is arranged on the printer 1 so that the front side is the front lower side of the printer 1 and the rear side is the rear upper side of the printer 1. It is installed.
　ドラムカートリッジ１８は、フレームの一例としてのドラムフレーム４５を備えている。 The drum cartridge 18 includes a drum frame 45 as an example of a frame.
　ドラムフレーム４５は、第１フレームの一例としてのベースフレーム４６と、第２フレームの一例としてのカバーフレーム４７とを備えている。
（１）ベースフレーム
　ベースフレーム４６は、図１～図３に示すように、ポリカーボネートとポリスチレンとのポリマーアロイなどの樹脂材料から形成され、壁部の一例としての左右１対のベース側壁５４と、ベース下壁５５と、ベース後壁５６と、ベース前壁５７とを一体的に備えている。 The drum frame 45 includes a base frame 46 as an example of a first frame and a cover frame 47 as an example of a second frame.
(1) Base frame As shown in FIGS. 1 to 3, the base frame 46 is formed of a resin material such as a polymer alloy of polycarbonate and polystyrene, and a pair of left and right base side walls 54 as an example of a wall portion; A base lower wall 55, a base rear wall 56, and a base front wall 57 are integrally provided.
　１対のベース側壁５４は、図２および図３に示すように、左右方向に互いに間隔を隔てて対向配置されている。 As shown in FIGS. 2 and 3, the pair of base side walls 54 are arranged to face each other with a space therebetween in the left-right direction.
　１対のベース側壁５４のうち、左側に配置されるベース側壁５４（以下、ベース左壁５４Ｌとする。）は、図２に示すように、その後側部分であり、第１干渉部支持部の一例としてのドラム収容部側壁６０と、その前側部分である現像収容部側壁６１とを一体的に有している。 Of the pair of base side walls 54, the base side wall 54 (hereinafter referred to as the base left wall 54L) disposed on the left side is a rear side portion as shown in FIG. The drum accommodating portion side wall 60 as an example and a developing accommodating portion side wall 61 which is a front side portion thereof are integrally provided.
　ドラム収容部側壁６０は、側面視略矩形状の略平板形状に形成されている。現像収容部側壁６１は、ドラム収容部側壁６０の前端縁における下側部分から連続して、前上方に向かって延びる側面視略矩形状に形成されている。 The drum housing side wall 60 is formed in a substantially flat plate shape that is substantially rectangular in a side view. The development accommodating portion side wall 61 is formed in a substantially rectangular shape in side view extending continuously from the lower portion of the front end edge of the drum accommodating portion side wall 60 toward the front upper side.
　また、ベース左壁５４Ｌには、カラー受入溝６２と、嵌合凹部６３とが形成されている。 Further, a collar receiving groove 62 and a fitting recess 63 are formed in the base left wall 54L.
　カラー受入溝６２は、ドラム収容部側壁６０の前端部における現像収容部側壁６１との接続部分の上側に形成されており、ドラム収容部側壁６０の前端縁から前方に向かって凹む側面視略Ｕ字状に形成されている。また、カラー受入溝６２は、その下面が現像収容部側壁６１の上面と連続している。 The color receiving groove 62 is formed above the connecting portion of the front end portion of the drum accommodating portion side wall 60 with the developing accommodating portion side wall 61, and is substantially U-shaped from the front end edge of the drum accommodating portion side wall 60. It is formed in a letter shape. Further, the lower surface of the color receiving groove 62 is continuous with the upper surface of the developing container side wall 61.
　嵌合凹部６３は、ドラム収容部側壁６０の左面における後側部分に形成されている。嵌合凹部６３は、ドラム収容部側壁６０の左面から右方に向かって凹み、かつ、ドラム収容部側壁６０の上端縁における後側部分から下方に向かって凹む側面視略矩形状に切り欠かれて形成されている。 The fitting recessed part 63 is formed in the rear side part in the left surface of the drum accommodating part side wall 60. As shown in FIG. The fitting recess 63 is notched in a substantially rectangular shape in a side view that is recessed from the left surface of the drum housing side wall 60 to the right and that is recessed downward from the rear portion of the upper end edge of the drum housing side wall 60. Is formed.
　また、ベース左壁５４Ｌには、干渉部の一例としての第１干渉部６４と、規制部材および第１被ガイド部の一例としての左側ガイドボス６５とが一体的に設けられている。 The base left wall 54L is integrally provided with a first interference part 64 as an example of an interference part and a left guide boss 65 as an example of a regulating member and a first guided part.
　第１干渉部６４は、ドラム収容部側壁６０の上端面における前端部に設けられ、ドラム収容部側壁６０の上端面から上方に向かって突出する側面視略矩形状に形成されている。また、第１干渉部６４の後端面は、図８に示すように、上方に向かうに従って後方に傾斜するように形成されている。 The first interference portion 64 is provided at the front end portion of the upper end surface of the drum housing portion side wall 60 and is formed in a substantially rectangular shape in side view protruding upward from the upper end surface of the drum housing portion side wall 60. Further, as shown in FIG. 8, the rear end surface of the first interference portion 64 is formed to incline backward as it goes upward.
　左側ガイドボス６５は、図２に示すように、現像収容部側壁６１の左面における前端部に設けられ、現像収容部側壁６１の左面から左方に向かって突出する略円筒形状に形成されている。 As shown in FIG. 2, the left guide boss 65 is provided at a front end portion on the left surface of the developer accommodating portion side wall 61 and is formed in a substantially cylindrical shape that protrudes leftward from the left surface of the developer accommodating portion side wall 61. .
　また、１対のベース側壁５４のうち、右側に配置されるベース側壁５４（以下、ベース右壁５４Ｒとする。）は、図３に示すように、その後側部分であるドラム収容部側壁６８と、その前側部分である現像収容部側壁６９とを一体的に有している。 In addition, the base side wall 54 (hereinafter referred to as the base right wall 54R) disposed on the right side of the pair of base side walls 54, as shown in FIG. , And a developing container side wall 69 which is a front portion thereof.
　ドラム収容部側壁６８は、側面視略矩形状の略平板形状に形成されている。現像収容部側壁６９は、ドラム収容部側壁６０の前端縁における下側部分から連続して、前上方に向かって延びる側面視略矩形状に形成されている。 The drum housing side wall 68 is formed in a substantially flat plate shape that is substantially rectangular when viewed from the side. The development accommodating portion side wall 69 is formed in a substantially rectangular shape in side view extending continuously from the lower portion of the front end edge of the drum accommodating portion side wall 60 toward the front upper side.
　また、ベース右壁５４Ｒには、カラー受入溝７４と、嵌合凹部７０とが形成されている。 Further, a collar receiving groove 74 and a fitting recess 70 are formed in the base right wall 54R.
　カラー受入溝７４は、左右方向に投影したときに、ベース左壁５４Ｌに形成されるカラー受入溝６２と一致するように、ドラム収容部側壁６８の前端部における現像収容部側壁６９との接続部分の上側に形成されている。 The color receiving groove 74 is connected to the developing container side wall 69 at the front end of the drum container side wall 68 so as to coincide with the color receiving groove 62 formed in the base left wall 54L when projected in the left-right direction. It is formed on the upper side.
　嵌合凹部７０は、ドラム収容部側壁６８の右面における上側部分に形成されている。また、嵌合凹部７０は、ドラム収容部側壁６８の右面から左方に向かって凹み、かつ、ドラム収容部側壁６０の上端縁における前後方向略中央部分から下方に向かって窪む側面視略半円形状に形成されている。 The fitting recess 70 is formed in the upper portion of the right surface of the drum accommodating portion side wall 68. Further, the fitting recess 70 is recessed from the right surface of the drum housing side wall 68 toward the left, and is recessed substantially downward from the substantially central portion in the front-rear direction at the upper end edge of the drum housing side wall 60. It is formed in a circular shape.
　また、ベース右壁５４Ｒには、補強部７１と、規制部材および第１被ガイド部の一例としての右側ガイドボス７２とが一体的に設けられている。 Further, the base right wall 54R is integrally provided with a reinforcing portion 71 and a right guide boss 72 as an example of a restricting member and a first guided portion.
　補強部７１は、カラー受入溝７４を右側から被覆するように、ベース右壁５４Ｒの右面に設けられている。補強部７１は、上方に向かうに従って幅狭となる側面視略台形状に形成されており、その上側部分において、カラー受入溝７４を被覆し、下側部分において、ドラム収容部側壁６８と現像収容部側壁６９との接続部分を被覆している。これにより、ベース右壁５４Ｒは、補強部７１により補強されており、ベース左壁５４Ｌよりも、剛性が大きくなるように構成されている。 The reinforcing portion 71 is provided on the right surface of the base right wall 54R so as to cover the collar receiving groove 74 from the right side. The reinforcing portion 71 is formed in a substantially trapezoidal shape in a side view that becomes narrower as it goes upward, and covers the color receiving groove 74 in the upper portion thereof, and the drum accommodating portion side wall 68 and the developer accommodating portion in the lower portion. The connecting portion with the side wall 69 is covered. As a result, the base right wall 54R is reinforced by the reinforcing portion 71, and is configured to be more rigid than the base left wall 54L.
　右側ガイドボス７２は、現像収容部側壁６９の右面における前端部に設けられ、左右方向に投影したときに、左側ガイドボス６５と一致するように設けられている。また、右側ガイドボス７２は、現像収容部側壁６１の右面から右方に向かって突出する略円筒形状に形成されている。 The right guide boss 72 is provided at the front end portion on the right surface of the developing container side wall 69 so as to coincide with the left guide boss 65 when projected in the left-right direction. The right guide boss 72 is formed in a substantially cylindrical shape that protrudes rightward from the right surface of the developer accommodating portion side wall 61.
　ベース下壁５５は、図１に示すように、両ベース側壁５４の下端部間に架設されるように、左右方向に長手の略平板形状に形成されている。 As shown in FIG. 1, the base lower wall 55 is formed in a substantially flat plate shape that is long in the left-right direction so as to be bridged between the lower ends of the base side walls 54.
　ベース後壁５６は、図３に示すように、両ベース側壁５４の後端部間に架設されている。ベース後壁５６は、図１に示すように、前上方に向かって開放される側面視略円弧形状に形成され、左右方向に延びる略部分円筒形状に形成されている。ベース後壁５６の内側には、上記した転写ローラ２１が回転可能に収容されている。 The base rear wall 56 is constructed between the rear ends of the base side walls 54 as shown in FIG. As shown in FIG. 1, the base rear wall 56 is formed in a substantially circular arc shape in a side view opened toward the front upper side, and is formed in a substantially partial cylindrical shape extending in the left-right direction. The transfer roller 21 is rotatably accommodated inside the base rear wall 56.
　ベース前壁５７は、両ベース側壁５４の前端部間に架設されており、その下端部がベース下壁５５の前端部に接続されている。また、ベース前壁５７は、ベース下壁５５の前端部から連続して、上方に向かうに従って前方に傾斜するように形成されている。また、ベース前壁５７は、図９および図１２に示すように、左右方向に投影したときに、左側ガイドボス６５および右側ガイドボス７２の中心軸線よりも後側に配置されている。 The base front wall 57 is constructed between the front end portions of both base side walls 54, and the lower end portion thereof is connected to the front end portion of the base lower wall 55. Further, the base front wall 57 is formed so as to incline forward as it goes upward from the front end of the base lower wall 55. Further, as shown in FIGS. 9 and 12, the base front wall 57 is disposed on the rear side of the center axis of the left guide boss 65 and the right guide boss 72 when projected in the left-right direction.
　また、ベース前壁５７には、図２および図３に示すように、把持部７５が一体的に設けられている。把持部７５は、延出部７６と、把持部分７７と、被押圧部７８とを一体的に有している。 Further, as shown in FIG. 2 and FIG. 3, a grip portion 75 is integrally provided on the base front wall 57. The grip portion 75 integrally includes an extension portion 76, a grip portion 77, and a pressed portion 78.
　延出部７６は、ベース前壁５７の上端部における左右方向略中央部分から連続して、図１に示すように、ベース前壁５７と傾斜が同じとなるように、上方に向かうに従って前方に傾斜して形成されている。 As shown in FIG. 1, the extending portion 76 is continuously forward from the substantially central portion in the left-right direction at the upper end portion of the base front wall 57, and is forwardly moved upward so that the inclination is the same as the base front wall 57. Inclined.
　把持部分７７は、図２および図３に示すように、延出部７６の後面における左右方向略中央部分から後方に向かって突出する略角筒形状に形成されている。 2 and 3, the gripping portion 77 is formed in a substantially rectangular tube shape that protrudes rearward from a substantially central portion in the left-right direction on the rear surface of the extending portion 76.
　被押圧部７８は、延出部７６の後面における左右両端部のそれぞれに設けられ、延出部７６の後面から後方に向かって突出する側面視略矩形状の略平板形状に形成されている。これにより、被押圧部７８は、把持部分７７の左右両端部のそれぞれに対して、左右方向の外側に間隔を隔てて対向配置されている。また、被押圧部７８の上端部は、延出部７６の上端部よりも僅かに下側に配置されている。また、被押圧部７８の上端面は、案内面の一例としてのガイド面７９として区画されている。ガイド面７９は、前後方向に沿って延びるように形成されている。
（２）カバーフレーム
　カバーフレーム４７は、ベースフレーム４６の後側部分の上側に配置されている。 The pressed portions 78 are provided on both the left and right ends of the rear surface of the extending portion 76, and are formed in a substantially flat plate shape that is substantially rectangular in a side view and protrudes rearward from the rear surface of the extending portion 76. Thus, the pressed portion 78 is disposed opposite to the left and right end portions of the gripping portion 77 on the outer side in the left-right direction with a gap therebetween. Further, the upper end portion of the pressed portion 78 is disposed slightly below the upper end portion of the extending portion 76. Further, the upper end surface of the pressed portion 78 is partitioned as a guide surface 79 as an example of a guide surface. The guide surface 79 is formed so as to extend along the front-rear direction.
(2) Cover frame The cover frame 47 is disposed above the rear portion of the base frame 46.
　カバーフレーム４７は、ポリカーボネートと、アクリロニトリル・ブタジエン・スチレン樹脂とのポリマーアロイなどの樹脂材料から形成され、左右方向に延び、下方および前方に向かって開放される略角筒形状に形成されている。カバーフレーム４７は、左右１対のカバー側壁８０と、カバー上壁８１と、カバー後壁８２とを備えている。 The cover frame 47 is formed of a resin material such as a polymer alloy of polycarbonate and acrylonitrile / butadiene / styrene resin, and has a substantially rectangular tube shape extending in the left-right direction and opened downward and forward. The cover frame 47 includes a pair of left and right cover side walls 80, a cover upper wall 81, and a cover rear wall 82.
　１対のカバー側壁８０は、左右方向に互いに間隔を隔てて対向配置されている。 The pair of cover side walls 80 are arranged to face each other with a space in the left-right direction.
　１対のカバー側壁８０のうち、左側に配置されるカバー側壁８０（以下、カバー左壁８０Ｌとする。）は、図２に示すように、側面視略矩形状の略平板形状に形成されている。カバー左壁８０Ｌは、側面視において、嵌合凹部６３とほぼ同一形状およびサイズに形成されており、嵌合凹部６３に嵌合可能に形成されている。 Of the pair of cover side walls 80, a cover side wall 80 (hereinafter referred to as a cover left wall 80L) disposed on the left side is formed in a substantially flat plate shape that is substantially rectangular in a side view as shown in FIG. Yes. The cover left wall 80L is formed in substantially the same shape and size as the fitting recess 63 in a side view, and is formed so as to be able to fit into the fitting recess 63.
　１対のカバー側壁８０のうち、右側に配置されるカバー側壁８０（以下、カバー右壁８０Ｒとする。）は、図３に示すように、前後方向に延びる側面視略矩形の平板形状に形成されている。カバー右壁８０Ｒには、嵌合凸部８５と、電極カバー８４とが設けられている。 Of the pair of cover side walls 80, a cover side wall 80 (hereinafter referred to as a cover right wall 80R) disposed on the right side is formed in a substantially rectangular flat plate shape extending in the front-rear direction as shown in FIG. Has been. A fitting convex portion 85 and an electrode cover 84 are provided on the cover right wall 80R.
　嵌合凸部８５は、カバー右壁８０Ｒの下端縁の前後方向略中央部分から下方に向かって突出する側面視略半円形状に形成されている。嵌合凸部８５は、側面視において、嵌合凹部７０とほぼ同一形状およびサイズに形成されており、嵌合凹部７０に嵌合可能に形成されている。 The fitting convex portion 85 is formed in a substantially semicircular shape in a side view projecting downward from a substantially central portion in the front-rear direction of the lower end edge of the cover right wall 80R. The fitting convex portion 85 is formed in substantially the same shape and size as the fitting concave portion 70 in a side view, and is formed so as to be fitted into the fitting concave portion 70.
　電極カバー８４は、カバー右壁８０Ｒとは別部材として、ポリカーボネートと、アクリロニトリル・ブタジエン・スチレン樹脂とのポリマーアロイなどの樹脂材料から形成されている。 The electrode cover 84 is formed of a resin material such as a polymer alloy of polycarbonate and acrylonitrile / butadiene / styrene resin as a separate member from the cover right wall 80R.
　また、電極カバー８４は、前後方向に延びる側面視略矩形状の略平板形状に形成され、カバー右壁８０Ｒの右面における上側部分に支持されている。 The electrode cover 84 is formed in a substantially flat plate shape that is substantially rectangular in a side view extending in the front-rear direction, and is supported by the upper portion of the right surface of the cover right wall 80R.
　また、電極カバー８４には、第２干渉部支持部の一例としての電極保持部８６と、干渉部の一例としての第２干渉部８７とが一体的に設けられている。 Also, the electrode cover 84 is integrally provided with an electrode holding portion 86 as an example of a second interference portion support portion and a second interference portion 87 as an example of an interference portion.
　電極保持部８６は、電極カバー８４の右面における前端部から、右方に向かって突出する略角筒形状に形成されている。これにより、電極保持部８６は、カバー右壁８０Ｒよりも補強されている。 The electrode holding portion 86 is formed in a substantially rectangular tube shape that protrudes rightward from the front end portion on the right surface of the electrode cover 84. Thereby, the electrode holding | maintenance part 86 is reinforced rather than the cover right wall 80R.
　第２干渉部８７は、電極保持部８６の上面に設けられており、側面視略クランク形状に形成されている。詳しくは、第２干渉部８７は、後側部分８９と、前側部分８８と、段差部９０とを一体的に有している。後側部分８９は、平面視略矩形状の略平板形状に形成されている。前側部分８８は、前側部分８８の前側かつ上側に配置され、平面視略矩形状の略平板形状に形成されている。段差部９０は、図１３に示すように、後側部分８９の前端部と、前側部分８８の後端部とを連結するように設けられ、後側部分８９の前端部から上方に向かうに従って後方に傾斜するように形成されている。 The second interference part 87 is provided on the upper surface of the electrode holding part 86, and is formed in a substantially crank shape in a side view. Specifically, the second interference portion 87 integrally includes a rear portion 89, a front portion 88, and a step portion 90. The rear portion 89 is formed in a substantially flat plate shape that is substantially rectangular in plan view. The front side portion 88 is disposed on the front side and the upper side of the front side portion 88, and is formed in a substantially flat plate shape having a substantially rectangular shape in plan view. As shown in FIG. 13, the stepped portion 90 is provided so as to connect the front end portion of the rear portion 89 and the rear end portion of the front portion 88, and rearward as it goes upward from the front end portion of the rear portion 89. It is formed so as to be inclined.
　また、第２干渉部８７の左右方向長さＬ２は、図４に示すように、第１干渉部６４の左右方向長さＬ１よりも長く形成されている。 Moreover, the left-right direction length L2 of the 2nd interference part 87 is formed longer than the left-right direction length L1 of the 1st interference part 64, as shown in FIG.
　また、カバー右壁８０Ｒには、図３に示すように、帯電器電極９１が設けられている。帯電器電極９１は、右側から露出されるように、電極保持部８６内に収容されており、スコロトロン型帯電器２２と電気的に接続されている。なお、帯電器電極９１は、図示しないが、プロセスカートリッジ１５が後述する装着位置に配置された状態において、本体ケーシング２内に設けられる本体電極に接触される。そして、本体電極からの電力が、帯電器電極９１を介してスコロトロン型帯電器２２に供給される。 Further, as shown in FIG. 3, a charger electrode 91 is provided on the cover right wall 80R. The charger electrode 91 is accommodated in the electrode holding portion 86 so as to be exposed from the right side, and is electrically connected to the scorotron charger 22. Although not shown, the charger electrode 91 is brought into contact with a main body electrode provided in the main body casing 2 in a state where the process cartridge 15 is disposed at a mounting position described later. Then, power from the main body electrode is supplied to the scorotron charger 22 via the charger electrode 91.
　カバー上壁８１は、両カバー側壁８０の上端部間に架設されており、左右方向に延び、下方に向かって開放される略角筒形状に形成されている。カバー上壁８１の内部には、図１に示すように、上記したスコロトロン型帯電器２２が支持されている。 The cover upper wall 81 is provided between the upper ends of the cover side walls 80, and is formed in a substantially rectangular tube shape that extends in the left-right direction and opens downward. As shown in FIG. 1, the above scorotron charger 22 is supported inside the cover upper wall 81.
　カバー後壁８２は、図２および図３に示すように、両カバー側壁８０の後端部間に架設され、その上端部がカバー上壁８１の後端部に接続されている。カバー後壁８２は、図１に示すように、下方に向かうに従って後方に傾斜するように形成されている。 As shown in FIGS. 2 and 3, the cover rear wall 82 is installed between the rear ends of the cover side walls 80, and the upper end thereof is connected to the rear end of the cover upper wall 81. As shown in FIG. 1, the cover rear wall 82 is formed so as to incline backward as it goes downward.
　また、カバー後壁８２には、図２および図３に示すように、排紙開口９２が形成されている。排紙開口９２は、カバー後壁８２の中央部分に形成され、左右方向に延びる背面視略矩形状に貫通形成されている。
（３）ドラムフレーム
　そして、ベースフレーム４６の嵌合凹部６３および嵌合凹部７０のそれぞれに、カバーフレーム４７のカバー左壁８０Ｌおよび嵌合凸部８５のそれぞれが嵌合されように、カバーフレーム４７をベースフレーム４６に組み付けると、ドラムフレーム４５が形成される。 Further, as shown in FIGS. 2 and 3, a paper discharge opening 92 is formed in the cover rear wall 82. The paper discharge opening 92 is formed in a central portion of the cover rear wall 82 and is formed to penetrate in a substantially rectangular shape in rear view extending in the left-right direction.
(3) Drum frame Then, the cover frame 47 so that the cover left wall 80L and the fitting convex portion 85 of the cover frame 47 are fitted to the fitting concave portion 63 and the fitting concave portion 70 of the base frame 46, respectively. Is assembled to the base frame 46, the drum frame 45 is formed.
　ドラムフレーム４５は、その前側部分が、現像カートリッジ収容部９５として区画され、その後側部分が、ドラム収容部９６として区画される。 The drum frame 45 has a front portion partitioned as a developing cartridge storage portion 95 and a rear portion partitioned as a drum storage portion 96.
　現像カートリッジ収容部９５は、図１および図２に示すように、詳しくは、１対の現像収容部側壁６１、ベース前壁５７およびベース下壁５５の前側部分により区画され、現像カートリッジ１９の着脱を許容するように上側が開放されて形成されている。 As shown in FIGS. 1 and 2, the developing cartridge housing portion 95 is defined in detail by a pair of developing housing portion side walls 61, a base front wall 57 and a front lower portion of the base lower wall 55. The upper side is opened so as to allow
　そして、現像カートリッジ収容部９５には、現像カートリッジ１９が収容されている。現像カートリッジ１９が現像カートリッジ収容部９５に収容された状態において、左側のカラー部材４９は、ベース左壁５４Ｌのカラー受入溝６２に受け入れられ、右側のカラー部材４９は、ベース右壁５４Ｒのカラー受入溝７４に受け入れられる。 The developer cartridge 19 is accommodated in the developer cartridge accommodating portion 95. In a state where the developing cartridge 19 is housed in the developing cartridge housing portion 95, the left color member 49 is received in the color receiving groove 62 of the base left wall 54L, and the right color member 49 is received in the color receiving wall of the base right wall 54R. It is received in the groove 74.
　ドラム収容部９６は、詳しくは、１対のドラム収容部側壁６０、ベース後壁５６、ベース下壁５５の後側部分およびカバーフレーム４７により区画されている。なお、ドラム収容部９６において、第１干渉部６４の後面と、第２干渉部８７の段差部９０とは、左右方向に投影したときに一致するように構成されている。 Specifically, the drum accommodating portion 96 is partitioned by a pair of drum accommodating portion side walls 60, a base rear wall 56, a rear portion of the base lower wall 55, and a cover frame 47. In the drum housing portion 96, the rear surface of the first interference portion 64 and the stepped portion 90 of the second interference portion 87 are configured to coincide with each other when projected in the left-right direction.
　また、ドラム収容部９６の内部空間には、感光ドラム２０が収容されている。 The photosensitive drum 20 is accommodated in the internal space of the drum accommodating portion 96.
　感光ドラム２０は、ドラム本体９７と、ドラム軸９８とを備えている。 The photosensitive drum 20 includes a drum body 97 and a drum shaft 98.
　ドラム本体９７は、左右方向に延びる略円筒形状に形成され、その周面には、周面を被覆するように樹脂からなる感光層が形成されている。ドラム軸９８は、左右方向に延びる略円柱形状に形成されており、その中心軸線がドラム本体９７の中心軸線と一致するように、ドラム本体９７内に相対回転可能に挿通されている。 The drum body 97 is formed in a substantially cylindrical shape extending in the left-right direction, and a photosensitive layer made of resin is formed on the peripheral surface thereof so as to cover the peripheral surface. The drum shaft 98 is formed in a substantially cylindrical shape extending in the left-right direction, and is inserted into the drum main body 97 so as to be relatively rotatable so that the central axis thereof coincides with the central axis of the drum main body 97.
　そして、ドラム軸９８の左端部１０５は、図２に示すように、ドラム収容部側壁６０およびカバー左壁８０Ｌを左右方向に相対回転不能に貫通し、ドラム軸９８の右端部１０６は、図３に示すように、ドラム収容部側壁６８および嵌合凸部８５を左右方向に相対回転不能に貫通している。 As shown in FIG. 2, the left end portion 105 of the drum shaft 98 passes through the drum housing side wall 60 and the cover left wall 80L so as not to be relatively rotatable in the left-right direction, and the right end portion 106 of the drum shaft 98 is As shown in FIG. 2, the drum accommodating portion side wall 68 and the fitting convex portion 85 are penetrated so as not to be relatively rotatable in the left-right direction.
　これらにより、感光ドラム２０は、ベースフレーム４６およびカバーフレーム４７に、左右方向に延びる軸線Ａを中心として回転可能に支持されている。また、感光ドラム２０は、カバーフレーム４７のカバー上壁８１により上側から被覆されている。 Thus, the photosensitive drum 20 is supported by the base frame 46 and the cover frame 47 so as to be rotatable about the axis A extending in the left-right direction. Further, the photosensitive drum 20 is covered from above by a cover upper wall 81 of the cover frame 47.
　なお、ドラム軸９８の左端部１０５は、図２および図３に示すように、カバー左壁８０Ｌから左方に向かって突出し、ドラム軸９８の右端部１０６は、嵌合凸部８５から右方に向かって突出している。そして、ドラム軸９８の左端部１０５および右端部１０６のそれぞれは、第２被ガイド部の一例として機能する。 2 and 3, the left end portion 105 of the drum shaft 98 protrudes leftward from the cover left wall 80L, and the right end portion 106 of the drum shaft 98 extends rightward from the fitting convex portion 85. Protrudes toward. Each of the left end portion 105 and the right end portion 106 of the drum shaft 98 functions as an example of a second guided portion.
　また、第１干渉部６４は、図４に示すように、左右方向において、ドラム軸９８の左端部１０５の近傍に配置され、第２干渉部８７は、左右方向において、ドラム軸９８の右端部１０６の近傍に配置されている。
３．本体ケーシングの詳細
（１）カートリッジ装着部
　本体ケーシング２は、図５に示すように、左右方向に間隔を隔てて対向配置される１対の本体側壁１００を備え、１対の本体側壁１００間には、図１に示すように、カートリッジ装着部１０１が設けられている。 As shown in FIG. 4, the first interference unit 64 is disposed in the vicinity of the left end portion 105 of the drum shaft 98 in the left-right direction, and the second interference unit 87 is the right end portion of the drum shaft 98 in the left-right direction. It is arranged in the vicinity of 106.
3. Details of Main Body Casing (1) Cartridge Mounting Portion As shown in FIG. 5, the main body casing 2 includes a pair of main body side walls 100 arranged to face each other with a gap in the left-right direction. As shown in FIG. 1, a cartridge mounting portion 101 is provided.
　カートリッジ装着部１０１は、プロセスカートリッジ１５が装着されるように構成され、本体ケーシング２内の後側部分において、上下方向における給紙部３の後側部分と定着ユニット１７との間に配置されている。 The cartridge mounting unit 101 is configured to mount the process cartridge 15, and is disposed between the rear portion of the sheet feeding unit 3 in the vertical direction and the fixing unit 17 in the rear portion of the main body casing 2. Yes.
　カートリッジ装着部１０１は、左右方向に延びる側面視略Ｌ字状に形成され、前側部分である第１装着部分１０２と、後側部分である第２装着部分１０３とを備えている。 The cartridge mounting portion 101 is formed in a substantially L shape in a side view extending in the left-right direction, and includes a first mounting portion 102 that is a front portion and a second mounting portion 103 that is a rear portion.
　第１装着部分１０２は、前後方向に延びる側面視略矩形状に形成され、その下端部において、ピックアップローラ１１および給紙ローラ１２を回転可能に支持している。また、第１装着部分１０２の上面は、プロセスカートリッジ１５の下端部、詳しくは、現像カートリッジ収容部９５に対応するベース下壁５５の下面に沿うように形成されている。 The first mounting portion 102 is formed in a substantially rectangular shape in a side view extending in the front-rear direction, and rotatably supports the pickup roller 11 and the paper feed roller 12 at the lower end portion thereof. Further, the upper surface of the first mounting portion 102 is formed along the lower end portion of the process cartridge 15, specifically, the lower surface of the base lower wall 55 corresponding to the developing cartridge housing portion 95.
　第２装着部分１０３は、上下方向に延びる側面視略矩形状に形成され、その前面における上下方向略中央部分には、係合溝１０４が形成されている。 The second mounting portion 103 is formed in a substantially rectangular shape in a side view extending in the vertical direction, and an engagement groove 104 is formed in a substantially central portion in the vertical direction on the front surface.
　係合溝１０４は、第２装着部分１０３の前面から後方に向かって窪む側面視略湾曲形状に形成され、プロセスカートリッジ１５の後端部、詳しくは、ベース後壁５６の外周面に沿うように形成されている。 The engagement groove 104 is formed in a substantially curved shape in side view that is recessed rearward from the front surface of the second mounting portion 103, and extends along the rear end portion of the process cartridge 15, specifically, the outer peripheral surface of the base rear wall 56. Is formed.
　そして、第２装着部分１０３は、第１装着部分１０２の後側に間隔を隔てて配置されている。これにより、第１装着部分１０２の後面と、第２装着部分１０３の前面における第１装着部分１０２と対向する部分とが、上記した給紙パス１４を形成している。
（２）ガイド部
　また、本体ケーシング２には、図５に示すように、ガイド部１１０と、規制部の一例としての突起１１１とが設けられている。 The second mounting portion 103 is disposed on the rear side of the first mounting portion 102 with an interval. As a result, the rear surface of the first mounting portion 102 and the portion of the front surface of the second mounting portion 103 facing the first mounting portion 102 form the paper feed path 14 described above.
(2) Guide part Moreover, as shown in FIG. 5, the main body casing 2 is provided with a guide part 110 and a protrusion 111 as an example of a restricting part.
　ガイド部１１０は、左右１対の本体側壁１００のそれぞれにおいて相対向するように設けられている。 The guide portion 110 is provided so as to face each other on each of the pair of left and right main body side walls 100.
　ガイド部１１０は、図９および図１２に示すように、第２ガイド部の一例としてのドラム軸ガイド部１１２と、第１ガイド部の一例としてのボスガイド部１１３と、当接部の一例としての当接面１１４とを備えている。 As shown in FIGS. 9 and 12, the guide part 110 includes a drum shaft guide part 112 as an example of a second guide part, a boss guide part 113 as an example of a first guide part, and an example of a contact part. The contact surface 114 is provided.
　ドラム軸ガイド部１１２は、本体側壁１００の左右方向内側面から左右方向外方に向かって窪むように形成され、本体側壁１００の上端部における前後方向略中央部分から、後方に向かうに従って下方に傾斜するように設けられている。また、ドラム軸ガイド部１１２の後端部は、本体側壁１００の後端部の上下方向略中央部分であって、第２装着部分１０３の係合溝１０４の前側に配置されている。 The drum shaft guide portion 112 is formed so as to be recessed from the inner side surface in the left-right direction of the main body side wall 100 toward the outer side in the left-right direction, and is inclined downward from the substantially central portion in the front-rear direction at the upper end portion of the main body side wall 100. It is provided as follows. Further, the rear end portion of the drum shaft guide portion 112 is a substantially central portion in the vertical direction of the rear end portion of the main body side wall 100, and is disposed on the front side of the engagement groove 104 of the second mounting portion 103.
　ボスガイド部１１３は、本体側壁１００の左右方向内側面から左右方向外方に向かって窪むように形成され、ドラム軸ガイド部１１２の前側に間隔を隔てて設けられており、本体側壁１００の上端部から、下方に向かうに従って後方に傾斜するように設けられている。ボスガイド部１１３は、詳しくは、上側の第１部分１１５と、下側の第２部分１１６とを一体的に有している。 The boss guide portion 113 is formed so as to be recessed from the left and right inner side surface of the main body side wall 100 toward the outer side in the left and right direction, and is provided on the front side of the drum shaft guide portion 112 with a space therebetween. And so as to incline backward as it goes downward. Specifically, the boss guide portion 113 integrally includes an upper first portion 115 and a lower second portion 116.
　第１部分１１５は、本体側壁１００の上端部から、ドラム軸ガイド部１１２と略同一の傾斜を有するように、後方に向かうに従って下方に傾斜するように設けられている。 The first portion 115 is provided so as to be inclined downward from the upper end portion of the main body side wall 100 toward the rear so as to have substantially the same inclination as the drum shaft guide portion 112.
　第２部分１１６は、第１部分１１５よりも下向きの傾斜が大きくなるように屈曲して、下方に向かうに従って後方に傾斜するように設けられている。つまり、ドラム軸ガイド部１１２およびボスガイド部１１３のそれぞれは、後述する装着方向Ｘの下流側、具体的には、後下方に向かうに従って、前後方向における互いの間隔が広がるように設けられている。 The second portion 116 is bent so that the downward inclination is larger than that of the first portion 115, and is inclined so as to be inclined backward as it goes downward. That is, each of the drum shaft guide portion 112 and the boss guide portion 113 is provided such that the distance between the drum shaft guide portion 112 and the boss guide portion 113 in the front-rear direction increases toward the downstream side in the mounting direction X, which will be described later. .
　また、第２部分１１６は、前下方に向かって膨出する側面視略湾曲形状に形成されている。また、第２部分１１６の後端部は、ドラム軸ガイド部１１２の後端部の前下方であって、第１装着部分１０２の前端部の前上側に配置されている。 Further, the second portion 116 is formed in a substantially curved shape in side view that bulges toward the front lower side. Further, the rear end portion of the second portion 116 is disposed in front of the rear end portion of the drum shaft guide portion 112 and on the front upper side of the front end portion of the first mounting portion 102.
　当接面１１４は、図５に示すように、本体側壁１００の上端部において、ドラム軸ガイド部１１２とボスガイド部１１３との間に形成され、図９に示すように、第１部分１１５の後端縁における上端部と、ボスガイド部１１３の前端縁における上端部とを連結するように、前後方向に沿って延びるように形成されている。
（３）突起
　突起１１１は、図８および図１２に示すように、左右１対の本体側壁１００のそれぞれに設けられ、左右方向に投影したときに互いに一致するように設けられている。具体的には、突起１１１は、左側の本体側壁１００に設けられる第１突起１１７と、右側の本体側壁１００に設けられる第２突起１１８とを備えている。 As shown in FIG. 5, the contact surface 114 is formed between the drum shaft guide portion 112 and the boss guide portion 113 at the upper end portion of the main body side wall 100, and as shown in FIG. The upper end portion at the rear end edge and the upper end portion at the front end edge of the boss guide portion 113 are formed so as to extend along the front-rear direction.
(3) Protrusion As shown in FIGS. 8 and 12, the protrusion 111 is provided on each of the pair of left and right main body side walls 100 so as to coincide with each other when projected in the left-right direction. Specifically, the protrusion 111 includes a first protrusion 117 provided on the left main body side wall 100 and a second protrusion 118 provided on the right main body side wall 100.
　第１突起１１７は、図８に示すように、第１干渉部６４に対応して、左側の本体側壁１００の右面における後上側部分に設けられている。第１突起１１７は、前方に向かうに従って先細りとなる側面視略三角形状に形成され、図５に示すように、左側の本体側壁１００の右面から右方に向かって突出するように形成されている。 As shown in FIG. 8, the first protrusion 117 is provided on the rear upper portion of the right side surface of the main body side wall 100 corresponding to the first interference portion 64. The first protrusion 117 is formed in a substantially triangular shape in a side view that tapers toward the front, and as shown in FIG. .
　第２突起１１８は、図１２に示すように、第２干渉部８７の段差部９０に対応して、右側の本体側壁１００の左面における後上側部分に設けられている。第２突起１１８は、前方に向かうに従って先細りとなる側面視略三角形状に形成され、左側の本体側壁１００の左面から左方に向かって突出して形成されている。
４．プロセスカートリッジの本体ケーシングに対する着脱動作
　次に、プロセスカートリッジ１５の本体ケーシング２に対する着脱動作を説明する。 As shown in FIG. 12, the second protrusion 118 is provided on the rear upper portion of the left surface of the right side wall 100 corresponding to the stepped portion 90 of the second interference portion 87. The second protrusion 118 is formed in a substantially triangular shape in a side view that tapers toward the front, and protrudes leftward from the left surface of the left main body side wall 100.
4). Next, the attaching / detaching operation of the process cartridge 15 to / from the main casing 2 will be described.
　プロセスカートリッジ１５を本体ケーシング２に装着するには、まず、図５に示すように、本体ケーシング２のトップカバー７を開放位置に配置させる。 To attach the process cartridge 15 to the main casing 2, first, as shown in FIG. 5, the top cover 7 of the main casing 2 is placed in the open position.
　このとき、当接面１１４は、カートリッジ開口部５を介して、前上側から露出している。 At this time, the contact surface 114 is exposed from the front upper side through the cartridge opening 5.
　次いで、図１１および図１４に示すように、ドラムカートリッジ１８の把持部７５の把持部分７７を把持して、プロセスカートリッジ１５を、ドラム軸９８が後下側、左側ガイドボス６５および右側ガイドボス７２が前上側となるように配置する。 Next, as shown in FIGS. 11 and 14, the gripping portion 77 of the gripping portion 75 of the drum cartridge 18 is gripped, and the process cartridge 15 is moved to the rear lower side, the left guide boss 65 and the right guide boss 72. Is placed on the front upper side.
　つまり、プロセスカートリッジ１５の本体ケーシング２に対する装着動作時において、ドラム軸９８の左端部１０５および右端部１０６のそれぞれは、左側ガイドボス６５および右側ガイドボス７２に対して、前上方から後下方に向かう装着方向Ｘの下流側に設けられている。また、第１干渉部６４および第２干渉部８７は、プロセスカートリッジ１５における後下側部分、すなわち、装着方向Ｘの下流側部分に設けられている。 That is, when the process cartridge 15 is mounted on the main casing 2, the left end portion 105 and the right end portion 106 of the drum shaft 98 are directed from the front upper side to the rear lower side with respect to the left guide boss 65 and the right guide boss 72. It is provided downstream in the mounting direction X. Further, the first interference part 64 and the second interference part 87 are provided in the rear lower part of the process cartridge 15, that is, in the downstream part in the mounting direction X.
　そして、図１１および図１４に示すように、ドラム軸９８の左端部１０５および右端部１０６のそれぞれが、対応するドラム軸ガイド部１１２に前上側から嵌合するように、プロセスカートリッジ１５を、装着方向Ｘに沿って、カートリッジ開口部５を介して、本体ケーシング２内に挿入する。 Then, as shown in FIGS. 11 and 14, the process cartridge 15 is mounted so that the left end portion 105 and the right end portion 106 of the drum shaft 98 are fitted to the corresponding drum shaft guide portions 112 from the front upper side. It is inserted into the main body casing 2 through the cartridge opening 5 along the direction X.
　続いて、プロセスカートリッジ１５を、ドラム軸ガイド部１１２に沿って後下方に向かって押し込む。そうすると、ドラム軸９８の左端部１０５および右端部１０６のそれぞれが、対応するドラム軸ガイド部１１２にガイドされ、プロセスカートリッジ１５が、装着方向Ｘに沿って後下方に向かって移動される。このとき、ドラム軸ガイド部１１２は、図１１に示すように、ドラム軸９８の左端部１０５を基準としてガイドする。 Subsequently, the process cartridge 15 is pushed rearward and downward along the drum shaft guide portion 112. Then, each of the left end portion 105 and the right end portion 106 of the drum shaft 98 is guided by the corresponding drum shaft guide portion 112, and the process cartridge 15 is moved rearward and downward along the mounting direction X. At this time, the drum shaft guide portion 112 guides with reference to the left end portion 105 of the drum shaft 98 as shown in FIG.
　そうすると、左側ガイドボス６５および右側ガイドボス７２のそれぞれが、図１１および図１４に示すように、対応するボスガイド部１１３の第１部分１１５に前上側から嵌合される。 Then, each of the left guide boss 65 and the right guide boss 72 is fitted to the first portion 115 of the corresponding boss guide portion 113 from the front upper side, as shown in FIGS.
　これにより、プロセスカートリッジ１５は、左側ガイドボス６５および右側ガイドボス７２のそれぞれが、対応するボスガイド部１１３にガイドされるガイド位置に配置される。 Thereby, the process cartridge 15 is disposed at the guide position where each of the left guide boss 65 and the right guide boss 72 is guided by the corresponding boss guide portion 113.
　そして、プロセスカートリッジ１５をさらに後下方に向かって押し込むと、左側ガイドボス６５および右側ガイドボス７２のそれぞれは、対応する第１部分１１５にガイドされ、第１部分１１５の下端部に到達する。 When the process cartridge 15 is further pushed rearward and downward, each of the left guide boss 65 and the right guide boss 72 is guided by the corresponding first portion 115 and reaches the lower end portion of the first portion 115.
　このとき、第１干渉部６４は、第１突起１１７の前下側を通過し、第２干渉部８７は、第２突起１１８の前下側を通過する。 At this time, the first interference part 64 passes through the front lower side of the first protrusion 117, and the second interference part 87 passes through the front lower side of the second protrusion 118.
　次いで、プロセスカートリッジ１５の把持部７５を下方に向かって押し込むと、ドラム軸９８の左端部１０５および右端部１０６のそれぞれが、対応するドラム軸ガイド部１１２にガイドされるとともに、左側ガイドボス６５および右側ガイドボス７２のそれぞれが、対応する第１部分１１５から第２部分１１６に移動され、第２部分１１６にガイドされる。 Next, when the grip portion 75 of the process cartridge 15 is pushed downward, the left end portion 105 and the right end portion 106 of the drum shaft 98 are guided by the corresponding drum shaft guide portions 112, and the left guide boss 65 and Each of the right guide bosses 72 is moved from the corresponding first portion 115 to the second portion 116 and guided to the second portion 116.
　これにより、プロセスカートリッジ１５は、装着方向Ｘに沿って後下方に向かって移動されるとともに、ドラム軸９８を支点として左側面視時計回りに回動される。 Thereby, the process cartridge 15 is moved rearward and downward along the mounting direction X, and is rotated clockwise in the left side view with the drum shaft 98 as a fulcrum.
　このとき、ドラム軸ガイド部１１２は、ドラム軸９８の左端部１０５を基準としてガイドし、ボスガイド部１１３の第２部分１１６は、左側ガイドボス６５を基準としてガイドする。 At this time, the drum shaft guide portion 112 guides using the left end portion 105 of the drum shaft 98 as a reference, and the second portion 116 of the boss guide portion 113 guides using the left guide boss 65 as a reference.
　そして、プロセスカートリッジ１５は、仮想線で示すように、ドラム軸９８の左端部１０５および右端部１０６のそれぞれが、対応するドラム軸ガイド部１１２の下端部に到達するとともに、左側ガイドボス６５および右側ガイドボス７２のそれぞれが、対応する第２部分１１６の下端部に到達すると、それ以上の装着方向Ｘの下流側に向かう移動が規制される。 In the process cartridge 15, as indicated by phantom lines, each of the left end portion 105 and the right end portion 106 of the drum shaft 98 reaches the lower end portion of the corresponding drum shaft guide portion 112, and the left guide boss 65 and right side When each of the guide bosses 72 reaches the lower end portion of the corresponding second portion 116, further movement toward the downstream side in the mounting direction X is restricted.
　このとき、プロセスカートリッジ１５は、その後端部が第２装着部分１０３の係合溝１０４に前側から受け入れられるとともに、その下端部が第１装着部分１０２に下側から支持される。 At this time, the rear end portion of the process cartridge 15 is received from the front side into the engagement groove 104 of the second mounting portion 103 and the lower end portion thereof is supported by the first mounting portion 102 from below.
　これにより、プロセスカートリッジ１５は、カートリッジ装着部１０１に装着される装着位置に配置される。つまり、ガイド部１１０は、カートリッジ装着部１０１に対するプロセスカートリッジ１５の装着をガイドする。 Thereby, the process cartridge 15 is arranged at the mounting position where the process cartridge 15 is mounted on the cartridge mounting portion 101. That is, the guide unit 110 guides the mounting of the process cartridge 15 on the cartridge mounting unit 101.
　次いで、トップカバー７を開放位置から閉鎖位置に移動させることにより、プロセスカートリッジ１５の本体ケーシング２への装着が完了する。 Next, the top cover 7 is moved from the open position to the closed position, whereby the mounting of the process cartridge 15 on the main casing 2 is completed.
　なお、プロセスカートリッジ１５を本体ケーシング２から離脱させるには、上記した装着動作と逆の手順に操作する。
（２）本体ケーシングに対するプロセスカートリッジの誤装着規制動作
　しかるに、プロセスカートリッジ１５は、ユーザが誤って、上記した装着動作におけるプロセスカートリッジ１５の装着軌跡と異なる軌跡で、本体ケーシング２に挿入される場合がある。 Note that, in order to detach the process cartridge 15 from the main casing 2, the procedure is reversed to the above-described mounting operation.
(2) Incorrect mounting regulation operation of the process cartridge with respect to the main body casing However, the process cartridge 15 may be inserted into the main body casing 2 by a trajectory different from the mounting trajectory of the process cartridge 15 in the above mounting operation. is there.
　例えば、図９および図１２に示すように、ユーザが誤って、左側ガイドボス６５および右側ガイドボス７２のそれぞれが、対応するボスガイド部１１３とは異なるドラム軸ガイド部１１２側に移動するように、プロセスカートリッジ１５を、本体ケーシング２に対して過度に後方に押し込む場合がある。 For example, as shown in FIGS. 9 and 12, the user may accidentally move each of the left guide boss 65 and the right guide boss 72 toward the drum shaft guide portion 112 that is different from the corresponding boss guide portion 113. In some cases, the process cartridge 15 is excessively pushed backward with respect to the main body casing 2.
　詳しくは、ドラム軸９８の左端部１０５および右端部１０６を対応するドラム軸ガイド部１１２に前上側から嵌合させた後、左側ガイドボス６５および右側ガイドボス７２がドラム軸ガイド部１１２側に移動するように、プロセスカートリッジ１５が、後下方に向かって本体ケーシング２に押し込まれる。 Specifically, after the left end portion 105 and the right end portion 106 of the drum shaft 98 are fitted to the corresponding drum shaft guide portions 112 from the front upper side, the left guide boss 65 and the right guide boss 72 move to the drum shaft guide portion 112 side. Thus, the process cartridge 15 is pushed into the main casing 2 rearward and downward.
　このような場合、プロセスカートリッジ１５が後下方に向かって押し込まれると、第１干渉部６４が、図８に示すように、装着方向Ｘの上流側から、第１突起１１７と噛み合うように、第１突起１１７を受け入れる。また、第２干渉部８７が、図１２に示すように、装着方向Ｘの上流側から、第２突起１１８と噛み合うように、第２突起１１８を受け入れる。つまり、図８および図１２に示すように、第１干渉部６４と第１突起１１７とが係合するとともに、第２干渉部８７と第２突起１１８とが係合する。 In such a case, when the process cartridge 15 is pushed rearward and downward, the first interference portion 64 is engaged with the first protrusion 117 from the upstream side in the mounting direction X as shown in FIG. One protrusion 117 is received. Further, as shown in FIG. 12, the second interference part 87 receives the second protrusion 118 from the upstream side in the mounting direction X so as to be engaged with the second protrusion 118. That is, as shown in FIGS. 8 and 12, the first interference part 64 and the first protrusion 117 are engaged, and the second interference part 87 and the second protrusion 118 are engaged.
　これにより、プロセスカートリッジ１５は、本体ケーシング２に対する、後下方に向かうそれ以上の挿入が規制される規制位置に配置される。 Thereby, the process cartridge 15 is arranged at the restriction position where the further insertion into the main body casing 2 toward the rear lower side is restricted.
　このとき、図９および図１２に示すように、左側ガイドボス６５および右側ガイドボス７２のそれぞれは、対応する当接面１１４に上側から当接している。そのため、プロセスカートリッジ１５の前端部は、下方に向かう移動が規制されており、プロセスカートリッジ１５は、ドラム軸９８を支点とする左側面視時計回りの回動が規制されている。 At this time, as shown in FIGS. 9 and 12, each of the left guide boss 65 and the right guide boss 72 is in contact with the corresponding contact surface 114 from above. For this reason, the front end portion of the process cartridge 15 is restricted from moving downward, and the process cartridge 15 is restricted from turning clockwise with the drum shaft 98 as a fulcrum.
　つまり、プロセスカートリッジ１５は、規制位置に配置された状態において、第１干渉部６４および第２干渉部８７のそれぞれが、第１突起１１７および第２突起１１８のそれぞれから離れる方向に移動することが規制されている。 That is, in the state where the process cartridge 15 is disposed at the restriction position, each of the first interference portion 64 and the second interference portion 87 may move in a direction away from each of the first protrusion 117 and the second protrusion 118. It is regulated.
　また、プロセスカートリッジ１５が規制位置に配置された状態において、把持部７５は、図６および図８に示すように、カートリッジ開口部５から、前上方に向かって突出している。 Further, in the state where the process cartridge 15 is disposed at the restriction position, the gripping portion 75 protrudes from the cartridge opening portion 5 toward the front upper side as shown in FIGS.
　また、左側ガイドボス６５および右側ガイドボス７２は、図６に示すように、対応する当接面１１４に当接した状態で、カートリッジ開口部５を介して、前上側から露出されている。 Further, as shown in FIG. 6, the left guide boss 65 and the right guide boss 72 are exposed from the front upper side through the cartridge opening portion 5 while being in contact with the corresponding contact surface 114.
　また、ベース前壁５７および延出部７６は、図９および図１２に示すように、上下方向に沿うように配置されており、左側ガイドボス６５および右側ガイドボス７２のそれぞれは、その中心軸線がベース前壁５７の前側に位置するように配置されている。また、被押圧部７８のガイド面７９は、後下方と前上方とを結ぶ方向に沿うように配置されている。
（３）プロセスカートリッジの規制位置から装着位置への移動動作
　プロセスカートリッジ１５が規制位置に配置された状態において、図９および図１２に示すように、トップカバー７を開放位置から閉鎖位置に向かって移動させると、押圧部１０の傾斜面４３の下端部が、把持部７５の延出部７６の上端部に後上側から当接するとともに、押圧部１０の下端部が被押圧部７８のガイド面７９に上側から当接する。 Further, as shown in FIGS. 9 and 12, the base front wall 57 and the extending portion 76 are arranged along the vertical direction, and each of the left guide boss 65 and the right guide boss 72 has its center axis line. Are arranged so as to be located on the front side of the base front wall 57. Further, the guide surface 79 of the pressed portion 78 is arranged along the direction connecting the rear lower part and the front upper part.
(3) Movement Operation of Process Cartridge from Restricted Position to Mounting Position In the state where the process cartridge 15 is disposed at the restricted position, the top cover 7 is moved from the open position toward the closed position as shown in FIGS. When moved, the lower end portion of the inclined surface 43 of the pressing portion 10 comes into contact with the upper end portion of the extending portion 76 of the grip portion 75 from the rear upper side, and the lower end portion of the pressing portion 10 is the guide surface 79 of the pressed portion 78. Abut from above.
　このとき、左側ガイドボス６５および右側ガイドボス７２のそれぞれが、対応する当接面１１４と当接しているので、トップカバー７の開放位置から閉鎖位置への移動が規制される。 At this time, since the left guide boss 65 and the right guide boss 72 are in contact with the corresponding contact surfaces 114, the movement of the top cover 7 from the open position to the closed position is restricted.
　次いで、トップカバー７を閉鎖位置に向かってさらに回動させると、押圧部１０の傾斜面４３が、把持部７５の延出部７６の上端部を前下方に向かって押圧するとともに、押圧部１０の下端部が、被押圧部７８のガイド面７９を前下方に向かって押圧する。 Next, when the top cover 7 is further rotated toward the closed position, the inclined surface 43 of the pressing portion 10 presses the upper end portion of the extending portion 76 of the gripping portion 75 forward and downward, and the pressing portion 10. The lower end portion of the member presses the guide surface 79 of the pressed portion 78 toward the front lower side.
　そうすると、左側ガイドボス６５および右側ガイドボス７２が、図１０および図１３に示すように、当接面１１４にガイドされて、対応するボスガイド部１１３の第１部分１１５に向かって前方に移動される。このとき、ドラム軸９８の左端部１０５および右端部１０６は、対応するドラム軸ガイド部１１２にガイドされることにより、前上方に向かって移動される。 Then, the left guide boss 65 and the right guide boss 72 are guided by the contact surface 114 and moved forward toward the first portion 115 of the corresponding boss guide portion 113 as shown in FIGS. 10 and 13. The At this time, the left end portion 105 and the right end portion 106 of the drum shaft 98 are moved toward the front upper side by being guided by the corresponding drum shaft guide portions 112.
　これにより、プロセスカートリッジ１５は、その前端部が前方に向かって移動されるとともに、その後端部が前上方に向かって移動される。つまり、被押圧部７８のガイド面７９は、プロセスカートリッジ１５を規制位置からガイド位置に向かって移動させる。 As a result, the front end of the process cartridge 15 is moved forward and the rear end thereof is moved forward and upward. That is, the guide surface 79 of the pressed portion 78 moves the process cartridge 15 from the restriction position toward the guide position.
　そうすると、図１３に示すように、第２干渉部８７が、前上方に向かって移動され、第２干渉部８７と第２突起１１８との係合が解除される。なお、図示しないが、第１干渉部６４も、同様に、前上方に向かって移動され、第１干渉部６４と第１突起１１７との係合が解除される。 Then, as shown in FIG. 13, the second interference part 87 is moved toward the front upper side, and the engagement between the second interference part 87 and the second protrusion 118 is released. Although not shown, the first interference portion 64 is similarly moved toward the front upper side, and the engagement between the first interference portion 64 and the first protrusion 117 is released.
　そして、左側ガイドボス６５および右側ガイドボス７２が、対応するボスガイド部１１３の第１部分１１５に到達すると、図１１および図１４に示すように、プロセスカートリッジ１５の自重により、第１部分１１５内に落下し、第１部分１１５の下端部に到達する。 Then, when the left guide boss 65 and the right guide boss 72 reach the first portion 115 of the corresponding boss guide portion 113, as shown in FIG. 11 and FIG. And reaches the lower end of the first portion 115.
　以上により、プロセスカートリッジ１５は、規制位置から、左側ガイドボス６５および右側ガイドボス７２が対応するボスガイド部１１３にガイドされるガイド位置に移動される。 As described above, the process cartridge 15 is moved from the restriction position to the guide position where the left guide boss 65 and the right guide boss 72 are guided by the corresponding boss guide portions 113.
　次いで、トップカバー７を、閉鎖位置に向かってさらに回動させると、押圧部１０が、把持部７５の被押圧部７８のガイド面７９を前下方に向かって押圧する。 Next, when the top cover 7 is further rotated toward the closed position, the pressing portion 10 presses the guide surface 79 of the pressed portion 78 of the grip portion 75 toward the front lower side.
　そうすると、ドラム軸９８の左端部１０５および右端部１０６が、対応するドラム軸ガイド部１１２にガイドされるとともに、左側ガイドボス６５および右側ガイドボス７２が、対応するボスガイド部１１３の第１部分１１５から第２部分１１６に移動され、第２部分１１６にガイドされる。 Then, the left end portion 105 and the right end portion 106 of the drum shaft 98 are guided by the corresponding drum shaft guide portions 112, and the left guide boss 65 and the right guide boss 72 are the first portions 115 of the corresponding boss guide portions 113. To the second part 116 and guided to the second part 116.
　これにより、プロセスカートリッジ１５は、トップカバー７の回動に伴って、装着方向Ｘに沿って後下方に向かって移動されるとともに、ドラム軸９８を支点として左側面視時計回りに回動される。 As a result, the process cartridge 15 is moved rearward and downward along the mounting direction X as the top cover 7 is rotated, and is rotated clockwise in the left side view with the drum shaft 98 as a fulcrum. .
　そして、トップカバー７が閉鎖位置に配置されると、仮想線で示すように、ドラム軸９８の左端部１０５および右端部１０６が、対応するドラム軸ガイド部１１２の下端部に到達するとともに、左側ガイドボス６５および右側ガイドボス７２が、対応する第２部分１１６の下端部に到達する。 When the top cover 7 is disposed at the closed position, as indicated by phantom lines, the left end portion 105 and the right end portion 106 of the drum shaft 98 reach the lower end portion of the corresponding drum shaft guide portion 112 and the left side. The guide boss 65 and the right guide boss 72 reach the lower end of the corresponding second portion 116.
　このとき、プロセスカートリッジ１５は、仮想線で示すように、カートリッジ装着部１０１に装着される装着位置に配置される。 At this time, the process cartridge 15 is disposed at a mounting position where the process cartridge 15 is mounted on the cartridge mounting portion 101 as indicated by a virtual line.
　以上により、トップカバー７の開放位置から閉鎖位置への回動に伴う、プロセスカートリッジ１５の規制位置から装着位置への移動が完了する。
６．作用効果
（１）プリンタ１では、図９に示すように、本体ケーシング２がガイド部１１０を有している。そのため、図１１および図１４に示すように、プロセスカートリッジ１５がカートリッジ装着部１０１に装着されるときに、プロセスカートリッジ１５は、ガイド部１１０にガイドされる。その結果、プロセスカートリッジ１５のカートリッジ装着部１０１に対する装着作業の円滑化を図ることができる。 As described above, the movement of the process cartridge 15 from the restriction position to the mounting position accompanying the rotation of the top cover 7 from the open position to the closed position is completed.
6). Operation and Effect (1) In the printer 1, the main body casing 2 has a guide portion 110 as shown in FIG. 9. Therefore, as shown in FIGS. 11 and 14, when the process cartridge 15 is mounted on the cartridge mounting portion 101, the process cartridge 15 is guided by the guide portion 110. As a result, the mounting operation of the process cartridge 15 on the cartridge mounting portion 101 can be facilitated.
　また、本体ケーシング２は、図８および図１２に示すように、突起１１１を有し、プロセスカートリッジ１５は、第１干渉部６４および第２干渉部８７を有している。そのため、プロセスカートリッジ１５が、装着軌跡と異なる軌跡で本体ケーシング２に挿入されると、第１干渉部６４および第２干渉部８７のそれぞれと、対応する突起１１１、具体的には、第１突起１１７および第２突起１１８のそれぞれとが係合し、プロセスカートリッジ１５の本体ケーシング２に対するそれ以上の挿入が規制される。その結果、プロセスカートリッジ１５の本体ケーシング２に対する誤った挿入を抑制できる。 Further, as shown in FIGS. 8 and 12, the main body casing 2 has a protrusion 111, and the process cartridge 15 has a first interference portion 64 and a second interference portion 87. Therefore, when the process cartridge 15 is inserted into the main body casing 2 along a trajectory different from the mounting trajectory, each of the first interference portion 64 and the second interference portion 87 and the corresponding protrusion 111, specifically, the first protrusion 117 and the second protrusion 118 engage with each other, and further insertion of the process cartridge 15 into the main body casing 2 is restricted. As a result, erroneous insertion of the process cartridge 15 into the main casing 2 can be suppressed.
　また、プロセスカートリッジ１５は、第１干渉部６４および第２干渉部８７のそれぞれと、第１突起１１７および第２突起１１８のそれぞれとが係合したときに、第１干渉部６４が第１突起１１７から、また、第２干渉部８７が第２突起１１８から離れる方向に移動することが、左側ガイドボス６５および右側ガイドボス７２が対応する当接面１１４と当接することにより規制されている。具体的には、プロセスカートリッジ１５は、左側ガイドボス６５および右側ガイドボス７２により、その前端部が下方に向かって移動することが規制されている。そのため、装着軌跡と異なる軌跡で本体ケーシング２に挿入されたときに、第１干渉部６４および第２干渉部８７のそれぞれと、第１突起１１７および第２突起１１８のそれぞれとを確実に接触させることができる。
（２）また、ガイド部１１０は、図１１に示すように、プロセスカートリッジ１５をカートリッジ装着部１０１に装着させるときに、プロセスカートリッジ１５の左端部、具体的には、ドラム軸９８の左端部１０５および左側ガイドボス６５を基準としてガイドする。そのため、ガイド部１１０がプロセスカートリッジ１５の左端部を確実にガイドできるので、プロセスカートリッジ１５の安定した装着動作を確保することができる。
（３）また、第２干渉部８７の左右方向長さＬ２は、図４に示すように、第１干渉部６４の左右方向長さＬ１よりも長く形成されている。 Further, when the process cartridge 15 is engaged with each of the first interference part 64 and the second interference part 87 and each of the first protrusion 117 and the second protrusion 118, the first interference part 64 is the first protrusion. The movement of the second interference portion 87 in a direction away from the second protrusion 118 from 117 is restricted by the left guide boss 65 and the right guide boss 72 coming into contact with the corresponding contact surface 114. Specifically, the process cartridge 15 is restricted by the left guide boss 65 and the right guide boss 72 from moving downward at the front end thereof. Therefore, each of the first interference part 64 and the second interference part 87 and each of the first protrusion 117 and the second protrusion 118 are reliably brought into contact with each other when inserted into the main body casing 2 along a path different from the mounting path. be able to.
(2) Further, as shown in FIG. 11, the guide part 110 is arranged such that when the process cartridge 15 is mounted on the cartridge mounting part 101, the left end part of the process cartridge 15, specifically, the left end part 105 of the drum shaft 98. The left guide boss 65 is used as a reference. Therefore, since the guide part 110 can reliably guide the left end part of the process cartridge 15, a stable mounting operation of the process cartridge 15 can be ensured.
(3) Moreover, the left-right direction length L2 of the 2nd interference part 87 is formed longer than the left-right direction length L1 of the 1st interference part 64, as shown in FIG.
　しかるに、プロセスカートリッジ１５がカートリッジ装着部１０１に装着されるときに、ガイド部１１０が、プロセスカートリッジ１５のドラム軸９８の左端部１０５および左側ガイドボス６５を基準としてガイドすると、プロセスカートリッジ１５の右端部には、プロセスカートリッジ１５の公差などに起因して、相対的に大きなガタつきが生じる場合がある。 However, when the process cartridge 15 is mounted on the cartridge mounting portion 101 and the guide portion 110 guides with reference to the left end portion 105 and the left guide boss 65 of the drum shaft 98 of the process cartridge 15, the right end portion of the process cartridge 15. In some cases, due to the tolerance of the process cartridge 15 or the like, a relatively large backlash may occur.
　この点、第２干渉部８７の左右方向長さＬ２が、第１干渉部６４の左右方向長さＬ１よりも長く形成されているので、プロセスカートリッジ１５がカートリッジ装着部１０１に装着されるときに、プロセスカートリッジ１５の右端部に相対的に大きなガタつきが生じても、第２干渉部８７と突起１１１とを確実に接触させることができる。 In this respect, since the length L2 of the second interference portion 87 in the left-right direction is longer than the length L1 of the first interference portion 64 in the left-right direction, the process cartridge 15 is mounted on the cartridge mounting portion 101. Even if a relatively large backlash occurs at the right end portion of the process cartridge 15, the second interference portion 87 and the protrusion 111 can be reliably brought into contact with each other.
　そのため、プロセスカートリッジ１５の安定した装着動作を確保することができながら、プロセスカートリッジ１５の本体ケーシング２に対する誤った挿入を確実に抑制できる。
（４）また、第２干渉部８７は、図３に示すように、ドラムフレーム４５とは別部材の電極カバー８４に設けられており、第２干渉部８７を有する電極カバー８４は、ドラムフレーム４５に支持されている。そのため、図１２に示すように、第２干渉部８７と突起１１１とが接触するときの衝撃が、感光ドラム２０を収容するドラムフレーム４５に作用することを抑制でき、ひいては、感光ドラム２０に作用することを抑制できる。そのため、ドラムフレーム４５に対する感光ドラム２０の位置精度が低下することを抑制できる。
（５）また、ドラムフレーム４５は、図３に示すように、ベースフレーム４６と、ベースフレーム４６に組み付けられるカバーフレーム４７とを有している。 Therefore, it is possible to reliably suppress erroneous insertion of the process cartridge 15 into the main casing 2 while ensuring a stable mounting operation of the process cartridge 15.
(4) Further, as shown in FIG. 3, the second interference portion 87 is provided on an electrode cover 84 which is a separate member from the drum frame 45, and the electrode cover 84 having the second interference portion 87 is a drum frame. 45. Therefore, as shown in FIG. 12, it is possible to suppress an impact when the second interference portion 87 and the protrusion 111 are in contact with each other, and thus to the drum frame 45 that houses the photosensitive drum 20. Can be suppressed. For this reason, it is possible to suppress a decrease in the positional accuracy of the photosensitive drum 20 with respect to the drum frame 45.
(5) Further, the drum frame 45 includes a base frame 46 and a cover frame 47 assembled to the base frame 46 as shown in FIG.
　そして、カバーフレーム４７のカバー右壁８０Ｒには、第２干渉部８７を支持する電極保持部８６が設けられている。 Further, an electrode holding portion 86 that supports the second interference portion 87 is provided on the cover right wall 80R of the cover frame 47.
　そのため、図１２に示すように、第２干渉部８７と突起１１１との接触による衝撃は、第２干渉部８７を介して電極保持部８６に作用する。 Therefore, as shown in FIG. 12, the impact caused by the contact between the second interference part 87 and the protrusion 111 acts on the electrode holding part 86 via the second interference part 87.
　この点、電極保持部８６は補強されているので、第２干渉部８７と突起１１１との接触による衝撃が電極保持部８６に作用しても、電極保持部８６が変形することを抑制できる。 In this respect, since the electrode holding portion 86 is reinforced, it is possible to prevent the electrode holding portion 86 from being deformed even if an impact due to contact between the second interference portion 87 and the protrusion 111 acts on the electrode holding portion 86.
　また、プロセスカートリッジ１５がカートリッジ装着部１０１に装着されるときに、ガイド部１１０が、プロセスカートリッジ１５の左端部を基準としてガイドすると、プロセスカートリッジ１５の右端部には、意図しない遠心力などの外力が作用する場合がある。 Further, when the guide unit 110 guides the process cartridge 15 with respect to the left end portion of the process cartridge 15 when the process cartridge 15 is mounted on the cartridge mounting portion 101, an external force such as an unintended centrifugal force is applied to the right end portion of the process cartridge 15. May work.
　この点、電極保持部８６が補強されているので、プロセスカートリッジ１５がカートリッジ装着部１０１に装着されるときに、プロセスカートリッジ１５の右端部に意図しない外力が作用しても、第２干渉部８７と第２突起１１８との接触による衝撃によって、電極保持部８６が変形することを確実に抑制できる。
（６）また、カバーフレーム４７は、図１に示すように、スコロトロン型帯電器２２を支持している。また、ベースフレーム４６のドラム収容部側壁６０には、図２に示すように、第１干渉部６４が設けられている。 In this respect, since the electrode holding portion 86 is reinforced, even if an unintended external force is applied to the right end portion of the process cartridge 15 when the process cartridge 15 is attached to the cartridge attachment portion 101, the second interference portion 87. It is possible to reliably suppress the electrode holding portion 86 from being deformed by an impact caused by contact between the first protrusion 118 and the second protrusion 118.
(6) Further, the cover frame 47 supports the scorotron charger 22 as shown in FIG. Further, as shown in FIG. 2, a first interference portion 64 is provided on the drum accommodating portion side wall 60 of the base frame 46.
　そのため、図８に示すように、第１干渉部６４と第１突起１１７とが接触したときの衝撃が、スコロトロン型帯電器２２を支持するカバーフレーム４７に作用することを抑制できる。その結果、図１に示すように、スコロトロン型帯電器２２と感光ドラム２０との相対的な位置精度が低下することを抑制できる。 Therefore, as shown in FIG. 8, it is possible to suppress the impact when the first interference portion 64 and the first protrusion 117 are in contact with the cover frame 47 that supports the scorotron charger 22. As a result, as shown in FIG. 1, it is possible to suppress the relative positional accuracy between the scorotron charger 22 and the photosensitive drum 20 from being lowered.
　一方、第２干渉部８７は、図３に示すように、電極保持部８６に支持されているが、電極保持部８６が補強され変形が抑制されているので、第２干渉部８７と突起１１１とが接触したときの衝撃により、スコロトロン型帯電器２２と感光ドラム２０との相対的な位置精度が低下することを抑制できる。
（７）また、ベース右壁５４Ｒは、図２および図３に示されるように、ベース左壁５４Ｌよりも、剛性が大きくなるように構成されている。 On the other hand, as shown in FIG. 3, the second interference portion 87 is supported by the electrode holding portion 86. However, since the electrode holding portion 86 is reinforced and the deformation is suppressed, the second interference portion 87 and the protrusion 111. It is possible to suppress the relative positional accuracy between the scorotron charger 22 and the photosensitive drum 20 from being reduced due to an impact when they contact each other.
(7) Further, as shown in FIGS. 2 and 3, the base right wall 54R is configured to have greater rigidity than the base left wall 54L.
　そのため、図１２に示すように、第２干渉部８７と第２突起１１８とが接触するときの衝撃が、ベース右壁５４Ｒに作用しても、ベース右壁５４Ｒが変形することを抑制できる。その結果、ドラムフレーム４５に対する感光ドラム２０の位置精度が低下することを確実に抑制できる。 Therefore, as shown in FIG. 12, even when an impact when the second interference part 87 and the second protrusion 118 come into contact with each other acts on the base right wall 54R, the deformation of the base right wall 54R can be suppressed. As a result, it is possible to reliably suppress the positional accuracy of the photosensitive drum 20 with respect to the drum frame 45 from being lowered.
　また、ベース右壁５４Ｒの剛性が大きくなるように構成されているので、プロセスカートリッジ１５がカートリッジ装着部１０１に装着されるときに、プロセスカートリッジ１５の右端部に意図しない外力が作用しても、第２干渉部８７と第２突起１１８との接触による衝撃によって、ベース右壁５４Ｒが変形することを確実に抑制できる。
（８）また、プロセスカートリッジ１５は、図２および図３に示すように、左側ガイドボス６５および右側ガイドボス７２を有している。また、本体ケーシング２の左右１対の本体側壁１００のそれぞれは、図５に示すように、当接面１１４を有している。 Further, since the rigidity of the base right wall 54R is increased, even when an unintended external force acts on the right end portion of the process cartridge 15 when the process cartridge 15 is mounted on the cartridge mounting portion 101, It is possible to reliably suppress the deformation of the base right wall 54R due to the impact caused by the contact between the second interference portion 87 and the second protrusion 118.
(8) The process cartridge 15 has a left guide boss 65 and a right guide boss 72 as shown in FIGS. Further, each of the pair of left and right main body side walls 100 of the main body casing 2 has a contact surface 114 as shown in FIG.
　そのため、プロセスカートリッジ１５がカートリッジ装着部１０１に対して装着されるときに、図１１および図１４に示すように、左側ガイドボス６５および右側ガイドボス７２が、対応するボスガイド部１１３にガイドされるので、プロセスカートリッジ１５のカートリッジ装着部１０１に対する円滑な装着作業を確実に確保することができる。 Therefore, when the process cartridge 15 is mounted on the cartridge mounting portion 101, the left guide boss 65 and the right guide boss 72 are guided by the corresponding boss guide portion 113, as shown in FIGS. Therefore, the smooth mounting operation of the process cartridge 15 with respect to the cartridge mounting portion 101 can be reliably ensured.
　また、プロセスカートリッジ１５が規制位置に配置された状態において、図９および図１２に示すように、左側ガイドボス６５および右側ガイドボス７２が、対応する当接面１１４と当接するので、プロセスカートリッジ１５の前端部が、下方に向かって移動することを確実に規制できる。
（９）また、当接面１１４は、図５に示すように、カートリッジ開口部５を介して、前上側から露出している。そのため、プロセスカートリッジ１５が規制位置に配置された状態において、図６に示すように、対応する当接面１１４に当接する左側ガイドボス６５および右側ガイドボス７２が、カートリッジ開口部５を介して、前上側から露出される。 Further, in the state where the process cartridge 15 is arranged at the restriction position, as shown in FIGS. 9 and 12, the left guide boss 65 and the right guide boss 72 are in contact with the corresponding contact surface 114, so that the process cartridge 15 It is possible to reliably regulate the movement of the front end of the lower portion toward the lower side.
(9) Further, as shown in FIG. 5, the contact surface 114 is exposed from the front upper side through the cartridge opening 5. Therefore, in the state where the process cartridge 15 is disposed at the restriction position, as shown in FIG. 6, the left guide boss 65 and the right guide boss 72 that abut against the corresponding abutment surface 114 are connected via the cartridge opening 5. It is exposed from the front upper side.
　そのため、ユーザは、左側ガイドボス６５および右側ガイドボス７２のそれぞれと、対応する当接面１１４とが当接していることを容易に確認でき、プロセスカートリッジ１５が、装着軌跡と異なる軌跡で本体ケーシング２に挿入されていることを容易に把握できる。
（１０）また、第１干渉部６４および第２干渉部８７は、図８および図１２に示すように、本体ケーシング２に対するプロセスカートリッジ１５の装着動作時において、プロセスカートリッジ１５の装着方向Ｘの下流側部分に設けられている。 Therefore, the user can easily confirm that each of the left guide boss 65 and the right guide boss 72 and the corresponding contact surface 114 are in contact with each other, and the process cartridge 15 has a main body casing with a track different from the mounting track. 2 can be easily grasped.
(10) Further, as shown in FIGS. 8 and 12, the first interference portion 64 and the second interference portion 87 are downstream in the mounting direction X of the process cartridge 15 during the mounting operation of the process cartridge 15 with respect to the main body casing 2. It is provided in the side part.
　そのため、プロセスカートリッジ１５の装着方向Ｘの下流側部分が、装着軌跡と異なる軌跡で、本体ケーシング２に挿入されると、第１干渉部６４および第２干渉部８７のそれぞれと、第１突起１１７および第２突起１１８のそれぞれとが接触し、プロセスカートリッジ１５が規制位置に配置される。 Therefore, when the downstream portion in the mounting direction X of the process cartridge 15 is inserted into the main body casing 2 along a trajectory different from the mounting trajectory, each of the first interference portion 64 and the second interference portion 87 and the first protrusion 117 are inserted. Each of the second protrusions 118 comes into contact with the second protrusion 118, and the process cartridge 15 is disposed at the restriction position.
　つまり、プロセスカートリッジ１５の本体ケーシング２に対する誤った挿入時において、早期に、プロセスカートリッジ１５の移動を規制できる。
（１１）また、プロセスカートリッジ１５は、図２および図３に示すように、把持部７５を有している。 That is, when the process cartridge 15 is erroneously inserted into the main casing 2, the movement of the process cartridge 15 can be regulated at an early stage.
(11) Further, as shown in FIGS. 2 and 3, the process cartridge 15 has a gripping portion 75.
　そのため、プロセスカートリッジ１５がカートリッジ装着部１０１に着脱されるときに、把持部７５が把持でき、プロセスカートリッジ１５のカートリッジ装着部１０１に対する着脱作業の円滑化を図ることができる。 Therefore, when the process cartridge 15 is attached to or detached from the cartridge mounting portion 101, the gripping portion 75 can be gripped, and the attachment / detachment work of the process cartridge 15 to the cartridge mounting portion 101 can be facilitated.
　また、把持部７５は、図６に示すように、プロセスカートリッジ１５が規制位置に配置された状態において、カートリッジ開口部５から、前上方に向かって突出している。 Further, as shown in FIG. 6, the grip portion 75 protrudes from the cartridge opening portion 5 toward the front upper side in a state where the process cartridge 15 is disposed at the restriction position.
　そのため、把持部７５を把持して、規制位置に配置されるプロセスカートリッジ１５を、本体ケーシング２から容易に離脱させることができる。
（１２）また、本体ケーシング２は、図９および図１２に示すように、トップカバー７を有している。そして、トップカバー７は、プロセスカートリッジ１５が規制位置に配置されている状態において、開放位置から閉鎖位置への移動が規制される。 Therefore, the process cartridge 15 arranged at the restriction position can be easily detached from the main casing 2 by grasping the grasping portion 75.
(12) Moreover, the main body casing 2 has the top cover 7, as shown in FIG. 9 and FIG. The top cover 7 is restricted from moving from the open position to the closed position in a state where the process cartridge 15 is disposed at the restriction position.
　そのため、プロセスカートリッジ１５が誤って本体ケーシング２に挿入されている状態で、トップカバー７が閉鎖位置に配置されることを抑制できる。
（１３）また、トップカバー７には、図１０および図１３に示すように、押圧部１０が設けられている。そして、トップカバー７を開放位置から閉鎖位置に向けてさらに移動させると、押圧部１０が、プロセスカートリッジ１５の把持部７５を押圧し、左側ガイドボス６５および右側ガイドボス７２が、対応するボスガイド部１１３に向かって移動される。これにより、プロセスカートリッジ１５が、規制位置からガイド位置に向かって移動される。 Therefore, it is possible to prevent the top cover 7 from being placed in the closed position in a state where the process cartridge 15 is erroneously inserted into the main body casing 2.
(13) The top cover 7 is provided with a pressing portion 10 as shown in FIGS. 10 and 13. When the top cover 7 is further moved from the open position to the closed position, the pressing portion 10 presses the grip portion 75 of the process cartridge 15, and the left guide boss 65 and the right guide boss 72 correspond to the corresponding boss guide. It moves toward the part 113. As a result, the process cartridge 15 is moved from the restriction position toward the guide position.
　そのため、規制位置にあるプロセスカートリッジ１５を、一旦本体ケーシング２から離脱させた後、再度、プロセスカートリッジ１５を本体ケーシング２に挿入する必要がなく、トップカバー７を開放位置から閉鎖位置に移動させることにより、プロセスカートリッジ１５を、規制位置からガイド位置に移動できる。 Therefore, after the process cartridge 15 in the restricting position is once detached from the main casing 2, there is no need to insert the process cartridge 15 into the main casing 2 again, and the top cover 7 is moved from the open position to the closed position. Thus, the process cartridge 15 can be moved from the restriction position to the guide position.
　その結果、プロセスカートリッジ１５のカートリッジ装着部１０１に対する着脱作業のより一層の円滑化を図ることができる。
（１４）また、被押圧部７８は、図９および図１２に示すように、ガイド面７９を有している。そして、押圧部１０が把持部７５を押圧したときに、ガイド面７９が、押圧部１０の下端部に押圧される。これにより、プロセスカートリッジ１５を規制位置からガイド位置に向かって確実に移動させることができる。
（１５）また、左側ガイドボス６５および右側ガイドボス７２は、図２および図３に示すように、左右方向に延びる略円筒形状に形成されている。 As a result, the process of attaching and detaching the process cartridge 15 to and from the cartridge mounting portion 101 can be further facilitated.
(14) Further, the pressed portion 78 has a guide surface 79 as shown in FIGS. When the pressing portion 10 presses the grip portion 75, the guide surface 79 is pressed against the lower end portion of the pressing portion 10. Thereby, the process cartridge 15 can be reliably moved from the restriction position toward the guide position.
(15) The left guide boss 65 and the right guide boss 72 are formed in a substantially cylindrical shape extending in the left-right direction, as shown in FIGS.
　そのため、図１０および図１３に示すように、左側ガイドボス６５および右側ガイドボス７２が対応するボスガイド部１１３に向かって前方に移動されるときに、左側ガイドボス６５および右側ガイドボス７２の円滑な移動を確保することができる。その結果、トップカバー７を開放位置から閉鎖位置に移動させたときに、プロセスカートリッジ１５の規制位置からガイド位置への円滑な移動を確保できる。
（１６）また、プロセスカートリッジ１５は、図２および図３に示すように、左右方向に延びるドラム軸９８を有している。そして、プロセスカートリッジ１５が、カートリッジ装着部１０１に装着されるときに、ドラム軸９８の左端部１０５および右端部１０６のそれぞれが、対応するドラム軸ガイド部１１２にガイドされる。そのため、プロセスカートリッジ１５カートリッジのカートリッジ装着部１０１に対する装着作業のより一層の円滑化を図ることができる。 Therefore, as shown in FIGS. 10 and 13, when the left guide boss 65 and the right guide boss 72 are moved forward toward the corresponding boss guide portion 113, the left guide boss 65 and the right guide boss 72 are smooth. Movement can be secured. As a result, when the top cover 7 is moved from the open position to the closed position, it is possible to ensure smooth movement of the process cartridge 15 from the restriction position to the guide position.
(16) Further, as shown in FIGS. 2 and 3, the process cartridge 15 has a drum shaft 98 extending in the left-right direction. When the process cartridge 15 is mounted on the cartridge mounting portion 101, each of the left end portion 105 and the right end portion 106 of the drum shaft 98 is guided by the corresponding drum shaft guide portion 112. Therefore, it is possible to further facilitate the mounting operation of the process cartridge 15 on the cartridge mounting portion 101.
　また、図４に示すように、第１干渉部６４および第２干渉部８７のそれぞれと、ドラム軸９８の左端部１０５および右端部１０６のそれぞれが、左右方向において互いに近傍に配置されているので、第１干渉部６４とドラム軸９８の左端部１０５との相対的な位置関係を一定に保つことができるとともに、第２干渉部８７とドラム軸９８の右端部１０６との相対的な位置関係を一定に保つことができる。 Further, as shown in FIG. 4, each of the first interference unit 64 and the second interference unit 87 and each of the left end portion 105 and the right end portion 106 of the drum shaft 98 are disposed in the vicinity in the left-right direction. In addition, the relative positional relationship between the first interference portion 64 and the left end portion 105 of the drum shaft 98 can be kept constant, and the relative positional relationship between the second interference portion 87 and the right end portion 106 of the drum shaft 98. Can be kept constant.
　そのため、図１２に示すように、ドラム軸９８の右端部１０６が対応するドラム軸ガイド部１１２にガイドされる一方、右側ガイドボス７２が、ボスガイド部１１３にガイドされていないときに、第２干渉部８７と第２突起１１８とをより一層確実に接触させることができる。
（１７）また、第１干渉部６４および第２干渉部８７のそれぞれは、図８および図１２に示すように、プロセスカートリッジ１５が装着軌跡と異なる軌跡で本体ケーシング２に挿入されたときに、第１突起１１７および第２突起１１８のそれぞれを装着方向Ｘの上流側から受け入れる。そのため、第１干渉部６４および第２干渉部８７のそれぞれと、第１突起１１７および第２突起１１８のそれぞれとを確実に係合させることができる。 Therefore, as shown in FIG. 12, when the right end portion 106 of the drum shaft 98 is guided by the corresponding drum shaft guide portion 112 and the right guide boss 72 is not guided by the boss guide portion 113, The interference part 87 and the 2nd protrusion 118 can be made to contact still more reliably.
(17) Further, as shown in FIGS. 8 and 12, each of the first interference unit 64 and the second interference unit 87 is inserted into the main body casing 2 along a track different from the mounting track. Each of the first protrusion 117 and the second protrusion 118 is received from the upstream side in the mounting direction X. Therefore, each of the 1st interference part 64 and the 2nd interference part 87, and each of the 1st protrusion 117 and the 2nd protrusion 118 can be engaged reliably.
　その結果、装着軌跡と異なる軌跡において、プロセスカートリッジ１５が本体ケーシング２に挿入されたときに、プロセスカートリッジ１５の本体ケーシング２に対するそれ以上の挿入を確実に規制できる。
７．変形例
　上記したプリンタ１は、本発明の画像形成装置の一実施形態であり、本発明は、上記した実施形態に限定されない。 As a result, when the process cartridge 15 is inserted into the main casing 2 in a path different from the mounting path, further insertion of the process cartridge 15 into the main casing 2 can be reliably controlled.
7). Modification The printer 1 described above is an embodiment of the image forming apparatus of the present invention, and the present invention is not limited to the above-described embodiment.
　本発明の画像形成装置は、上記したモノクロプリンタの他、カラープリンタとして構成することもできる。 The image forming apparatus of the present invention can be configured as a color printer in addition to the above-described monochrome printer.
　画像形成装置をカラープリンタとして構成する場合には、複数の感光ドラムと記録媒体搬送部材とを備えるダイレクト方式のタンデム型カラープリンタや、複数の感光ドラムと、中間転写体と、転写部材とを備える中間転写方式のタンデム型カラープリンタとして構成することができる。 When the image forming apparatus is configured as a color printer, the image forming apparatus includes a direct tandem type color printer including a plurality of photosensitive drums and a recording medium conveying member, a plurality of photosensitive drums, an intermediate transfer member, and a transfer member. It can be configured as an intermediate transfer type tandem color printer.
　また、プロセスカートリッジ１５は、上記したようなドラムカートリッジ１８と現像カートリッジ１９とが分離する分離型の他、ドラムカートリッジ１８と現像カートリッジ１９とを一体的に備える一体型として構成することもできる。 Further, the process cartridge 15 may be configured as an integral type integrally including the drum cartridge 18 and the developing cartridge 19 in addition to the separation type in which the drum cartridge 18 and the developing cartridge 19 are separated as described above.
　さらに、本体ケーシング２に感光体を設けて、現像カートリッジ１９のみを本体ケーシング２に対して着脱させることもできる。この場合、現像カートリッジ１９が、カートリッジの一例として対応する。 Furthermore, it is also possible to provide a photosensitive member in the main casing 2 and attach and detach only the developing cartridge 19 to the main casing 2. In this case, the developing cartridge 19 corresponds to an example of the cartridge.
　また、上記の実施形態では、感光ドラム２０が回転体の一例であるが、回転体には、感光ドラム２０などの感光体の他、現像ローラ３４や、供給ローラ３３などのローラ部材などが含まれる。例えば、本体ケーシング２に感光体を設けて、現像カートリッジ１９のみを本体ケーシング２に対して着脱させる構成とした場合、現像カートリッジ１９に設けられる現像ローラ３４が回転体の一例として対応する。 In the above embodiment, the photosensitive drum 20 is an example of a rotating body. However, the rotating body includes a photosensitive member such as the photosensitive drum 20 and a roller member such as a developing roller 34 and a supply roller 33. It is. For example, when the photosensitive member is provided in the main casing 2 and only the developing cartridge 19 is attached to and detached from the main casing 2, the developing roller 34 provided in the developing cartridge 19 corresponds to an example of the rotating body.
　さらに、上記したプリンタ１は、画像読取部などを装備して、複合機として構成することもできる。 Furthermore, the above-described printer 1 can be configured as a multi-function machine equipped with an image reading unit and the like.
　これらによっても、上記した実施形態と同様の作用効果を奏することができる。なお、上記した実施形態および変形例は、適宜組み合わせることができる。 Also by these, the same effect as the above-described embodiment can be obtained. Note that the above-described embodiments and modifications can be combined as appropriate.
１　　　プリンタ
２　　　本体ケーシング
５　　　カートリッジ開口部
７　　　トップカバー
１０　　押圧部
１５　　プロセスカートリッジ
２０　　感光ドラム
４５　　ドラムフレーム
４６　　ベースフレーム
４７　　カバーフレーム
５４　　ベース側壁
５４Ｌ　ベース左壁５４Ｌ
５４Ｒ　ベース右壁５４Ｒ
６０　　ドラム収容部側壁
６４　　第１干渉部
７５　　把持部
７９　　ガイド面
８６　　電極保持部
８７　　第２干渉部
１０１　カートリッジ装着部
１０５　ドラム軸の左端部
１０６　ドラム軸の右端部
１１０　ガイド部
１１１　突起
１１２　ドラム軸ガイド部
１１３　ボスガイド部
１１４　当接面 DESCRIPTION OF SYMBOLS 1 Printer 2 Main body casing 5 Cartridge opening part 7 Top cover 10 Press part 15 Process cartridge 20 Photosensitive drum 45 Drum frame 46 Base frame 47 Cover frame 54 Base side wall 54L Base left wall 54L
54R Base right wall 54R
60 Drum housing side wall 64 First interference portion 75 Grip portion 79 Guide surface 86 Electrode holding portion 87 Second interference portion 101 Cartridge mounting portion 105 Drum shaft left end portion 106 Drum shaft right end portion 110 Guide portion 111 Projection 112 Drum shaft guide Part 113 boss guide part 114 contact surface

Claims (17)

  1. 　軸線を中心として回転するように構成され、かつ、現像剤を担持するように構成される回転体を有するカートリッジと、
    　前記カートリッジが装着されるように構成されるカートリッジ装着部を有する装置本体と、を備え、
    　前記装置本体は、
    　　前記カートリッジ装着部に対する前記カートリッジの装着をガイドするように構成されるガイド部と、
    　　前記ガイド部にガイドされて、前記カートリッジ装着部に装着されるときの前記カートリッジの装着軌跡と異なる軌跡で、前記カートリッジが前記装置本体に挿入されたときに、前記カートリッジの挿入を規制する規制部と、を有し、
    　前記カートリッジは、
    　　前記異なる軌跡で前記装置本体に挿入されたときに、前記規制部と接触する干渉部と、
    　　前記規制部と前記干渉部とが接触するときに、前記干渉部が前記規制部から離れる方向に前記カートリッジが移動することを規制する規制部材とを有していることを特徴とする、画像形成装置。     A cartridge having a rotating body configured to rotate about an axis and configured to carry a developer;
    An apparatus main body having a cartridge mounting portion configured to be mounted with the cartridge,
    The apparatus main body is
    A guide portion configured to guide mounting of the cartridge with respect to the cartridge mounting portion;
    A restriction portion that is guided by the guide portion and restricts insertion of the cartridge when the cartridge is inserted into the apparatus main body along a locus different from the attachment locus of the cartridge when the cartridge is attached to the cartridge attachment portion. And having
    The cartridge is
    An interference portion that comes into contact with the restriction portion when inserted into the apparatus main body along the different path;
    An image forming apparatus comprising: a regulating member that regulates movement of the cartridge in a direction in which the interference unit moves away from the regulating unit when the regulating unit and the interference unit are in contact with each other. apparatus.
  2. 　前記ガイド部は、
    　　前記カートリッジを前記カートリッジ装着部に装着させるときに、前記カートリッジの前記軸線に沿う軸線方向の一方側である第１の側を、基準としてガイドするように構成されていることを特徴とする、請求項１に記載の画像形成装置。     The guide portion is
    The first side which is one side in the axial direction along the axis of the cartridge is guided as a reference when the cartridge is mounted on the cartridge mounting portion. Item 2. The image forming apparatus according to Item 1.
  3. 　前記干渉部は、
    　　前記軸線方向における前記第１の側に設けられる第１干渉部と、
    　　前記軸線方向における前記第１の側と反対側の第２の側に設けられる第２干渉部と、を有し、
    　前記第２干渉部の前記軸線方向長さは、前記第１干渉部の前記軸線方向長さよりも長く形成されていることを特徴とする、請求項２に記載の画像形成装置。     The interference unit is
    A first interference unit provided on the first side in the axial direction;
    A second interference portion provided on a second side opposite to the first side in the axial direction,
    The image forming apparatus according to claim 2, wherein the axial length of the second interference unit is longer than the axial length of the first interference unit.
  4. 　前記カートリッジは、前記回転体を収容するフレームを有し、
    　前記第２干渉部は、前記フレームとは別部材として、前記フレームに支持されていることを特徴とする、請求項３に記載の画像形成装置。     The cartridge has a frame that houses the rotating body,
    The image forming apparatus according to claim 3, wherein the second interference unit is supported by the frame as a separate member from the frame.
  5. 　前記フレームは、
    　　前記回転体を回転可能に支持する第１フレームと、
    　　前記回転体を被覆するように、前記第１フレームに組み付けられる第２フレームとを有し、
    　前記第２フレームの前記第２の側の端部には、前記第２干渉部を支持する第２干渉部支持部が設けられ、
    　前記第２干渉部支持部は、補強されていることを特徴とする、請求項４に記載の画像形成装置。     The frame is
    A first frame that rotatably supports the rotating body;
    A second frame assembled to the first frame so as to cover the rotating body;
    A second interference part support part that supports the second interference part is provided at an end of the second frame on the second side,
    The image forming apparatus according to claim 4, wherein the second interference unit support unit is reinforced.
  6. 　前記第２フレームは、前記回転体の表面を帯電するように構成される帯電器を支持し、
    　前記第１フレームの前記第１の側の端部には、前記第１干渉部を支持する第１干渉部支持部が設けられていることを特徴とする、請求項５に記載の画像形成装置。     The second frame supports a charger configured to charge the surface of the rotating body;
    The image forming apparatus according to claim 5, wherein a first interference portion support portion that supports the first interference portion is provided at an end portion on the first side of the first frame. .
  7. 　前記第１フレームは、前記軸線方向に互いに間隔を隔てて対向配置される壁部を有し、
    　前記第２の側に配置される前記壁部は、前記第１の側に配置される前記壁部よりも、剛性が大きくなるように構成されていることを特徴とする、請求項５または６に記載の画像形成装置。     The first frame has walls that are arranged to face each other at an interval in the axial direction,
    The said wall part arrange | positioned at the said 2nd side is comprised so that rigidity may become larger than the said wall part arrange | positioned at the said 1st side, The said Claim 5 or 6 characterized by the above-mentioned. The image forming apparatus described in 1.
  8. 　前記カートリッジは、
    　　前記ガイド部にガイドされる第１被ガイド部を有し、
    　前記装置本体は、
    　　前記規制部と前記干渉部とが接触するとき、前記第１被ガイド部と当接し、前記干渉部が前記規制部から離れる方向に前記カートリッジが移動することを規制する当接部を有していることを特徴とする、請求項１～７のいずれか一項に記載の画像形成装置。     The cartridge is
    A first guided portion guided by the guide portion;
    The apparatus main body is
    A contact portion that contacts the first guided portion when the restricting portion and the interference portion contact each other, and restricts the cartridge from moving in a direction away from the restricting portion; The image forming apparatus according to any one of claims 1 to 7, wherein the image forming apparatus comprises:
  9. 　前記装置本体には、前記カートリッジを着脱するための開口部が形成され、
    　前記当接部は、前記開口部を介して、前記カートリッジの装着方向の上流側から露出していることを特徴とする、請求項８に記載の画像形成装置。     An opening for attaching and detaching the cartridge is formed in the apparatus main body,
    The image forming apparatus according to claim 8, wherein the contact portion is exposed from the upstream side in the mounting direction of the cartridge through the opening.
  10. 　前記干渉部は、
    　　前記カートリッジにおいて、前記装着方向の下流側部分に設けられていることを特徴とする、請求項９に記載の画像形成装置。     The interference unit is
    The image forming apparatus according to claim 9, wherein the cartridge is provided in a downstream portion of the mounting direction.
  11. 　前記カートリッジは、前記カートリッジ装着部に着脱されるときに把持される把持部を有し、
    　前記把持部は、
    　　前記規制部と前記干渉部とが接触するとき、前記開口部から、前記装着方向の上流側に向かって突出していることを特徴とする、請求項１０に記載の画像形成装置。     The cartridge has a grip portion to be gripped when being attached to and detached from the cartridge mounting portion,
    The gripping part is
    The image forming apparatus according to claim 10, wherein when the restricting portion and the interference portion are in contact with each other, the image forming device projects from the opening portion toward the upstream side in the mounting direction.
  12. 　前記装置本体は、
    　　前記開口部を開放する開放位置と、前記開口部を閉鎖する閉鎖位置とに移動するように構成される開閉部材を有し、
    　前記開閉部材は、
    　　前記規制部と前記干渉部とが接触するとき、前記開放位置から前記閉鎖位置への移動が規制されるように構成されていることを特徴とする、請求項１１に記載の画像形成装置。     The apparatus main body is
    An open / close member configured to move to an open position for opening the opening and a closed position for closing the opening;
    The opening / closing member is
    The image forming apparatus according to claim 11, wherein the movement from the open position to the closed position is restricted when the restriction portion and the interference portion come into contact with each other.
  13. 　前記開閉部材には、
    　　前記開放位置から前記閉鎖位置に向けて移動するときに、前記規制部と前記干渉部との接触により前記装着方向の下流側への移動が規制される規制位置に配置される前記カートリッジの前記把持部を、前記第１被ガイド部が前記ガイド部に向かうように押圧する押圧部を有し、
    　前記カートリッジは、
    　　前記把持部が前記押圧部に押圧されることにより、前記規制位置から、前記第１被ガイド部が前記ガイド部にガイドされるガイド位置に移動されるように構成されていることを特徴とする、請求項１２に記載の画像形成装置。     In the opening and closing member,
    The gripping of the cartridge disposed at a restriction position where movement toward the downstream side in the mounting direction is restricted by contact between the restriction part and the interference part when moving from the open position toward the closed position. A pressing portion that presses the portion so that the first guided portion faces the guide portion,
    The cartridge is
    When the gripping part is pressed by the pressing part, the first guided part is moved from the restriction position to a guide position guided by the guide part. The image forming apparatus according to claim 12.
  14. 　前記把持部は、
    　　前記押圧部に押圧されたときに、前記カートリッジを前記規制位置から前記ガイド位置に向かって移動させる案内面を有していることを特徴とする、請求項１３に記載の画像形成装置。     The gripping part is
    The image forming apparatus according to claim 13, further comprising a guide surface that moves the cartridge from the restriction position toward the guide position when pressed by the pressing portion.
  15. 　前記第１被ガイド部は、前記軸線に沿う軸線方向に延びる略円柱形状に形成されていることを特徴とする、請求項１３または１４に記載の画像形成装置。 15. The image forming apparatus according to claim 13, wherein the first guided portion is formed in a substantially cylindrical shape extending in an axial direction along the axis.
  16. 　前記カートリッジは、
    　　前記第１被ガイド部に対して、前記カートリッジの装着方向の下流側に設けられる第２被ガイド部を有し、
    　前記ガイド部は、
    　　前記第１被ガイド部をガイドするように構成される第１ガイド部と、
    　　前記第２被ガイド部をガイドするように構成される第２ガイド部とを有し、
    　前記干渉部は、
    　　前記第２被ガイド部の近傍に配置されていることを特徴とする、請求項９～１５のいずれか一項に記載の画像形成装置。     The cartridge is
    A second guided portion provided on the downstream side in the mounting direction of the cartridge with respect to the first guided portion;
    The guide portion is
    A first guide portion configured to guide the first guided portion;
    A second guide portion configured to guide the second guided portion;
    The interference unit is
    The image forming apparatus according to any one of claims 9 to 15, wherein the image forming apparatus is disposed in the vicinity of the second guided portion.
  17. 　前記干渉部は、前記規制部を前記カートリッジの装着方向の上流側から受け入れるように構成されていることを特徴とする、請求項１～１６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 16, wherein the interference unit is configured to receive the restricting unit from an upstream side in a mounting direction of the cartridge.
PCT/JP2012/081128 2012-11-20 2012-11-30 Image forming device WO2014080540A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08179626A (en) * 1994-12-26 1996-07-12 Canon Inc Process cartridge and image forming device
JPH08297453A (en) * 1995-04-26 1996-11-12 Canon Inc Attachment/detachment guide member and image forming device
JPH10222041A (en) * 1996-12-03 1998-08-21 Canon Inc Process cartridge and electrophotographic image forming device
JP2000132069A (en) * 1998-10-28 2000-05-12 Canon Inc Process cartridge, electrophotographic image forming device, and method for attaching charging roller
JP2004012562A (en) * 2002-06-04 2004-01-15 Canon Inc Electrophotographic image forming apparatus and process cartridge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08179626A (en) * 1994-12-26 1996-07-12 Canon Inc Process cartridge and image forming device
JPH08297453A (en) * 1995-04-26 1996-11-12 Canon Inc Attachment/detachment guide member and image forming device
JPH10222041A (en) * 1996-12-03 1998-08-21 Canon Inc Process cartridge and electrophotographic image forming device
JP2000132069A (en) * 1998-10-28 2000-05-12 Canon Inc Process cartridge, electrophotographic image forming device, and method for attaching charging roller
JP2004012562A (en) * 2002-06-04 2004-01-15 Canon Inc Electrophotographic image forming apparatus and process cartridge

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JP2014102405A (en) 2014-06-05

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