JP6380334B2 - Cleaning device and image forming apparatus having the same - Google Patents

Description

  The present invention relates to a cleaning device and an image forming apparatus including the same.

  The electrophotographic image forming apparatus includes a cleaning device that removes toner remaining on the surface of the photoreceptor.

  For example, the cleaning device described in Patent Document 1 includes a cleaning roller (abrasion roller) that rotates in contact with a photosensitive drum, and a toner layer thickness regulating roller that rotates in contact with the cleaning roller. The cleaning roller holds the toner removed from the surface of the photosensitive drum. A toner layer is formed on each of the surface of the cleaning roller and the surface of the toner layer thickness regulating roller. The toner layer thickness regulating roller makes the thickness of the toner layer formed on the cleaning roller uniform.

JP 2011-137859 A

  Incidentally, recent image forming apparatuses are required to increase the printing speed. For this reason, each of the photosensitive drum, the cleaning roller, and the toner layer thickness regulating roller rotates at a high speed. However, since the centrifugal force increases with the high-speed rotation of the cleaning roller and the toner layer thickness regulating roller, the toner is detached from the surfaces of the cleaning roller and the toner layer thickness regulating roller. When the toner layer on the toner layer thickness regulating roller decreases, the residual toner on the cleaning roller is scraped off excessively. For this reason, the toner layer on the cleaning roller has a non-uniform thickness, and the photosensitive drum cannot be properly polished. When image formation was performed with a photoconductor drum that was not sufficiently polished, problems such as image flow occurred.

  In order to solve the above-described problems, the present invention provides a cleaning device that stabilizes the thickness of a toner layer formed on the surfaces of a polishing roller and a regulating roller, and an image forming apparatus including the same.

  In order to achieve the above object, a cleaning device of the present invention includes a polishing roller that rotates while contacting an image carrier that carries a toner image, and a regulation roller that rotates while contacting the polishing roller, A first toner layer is formed on the surface of the polishing roller by the toner removed from the surface of the image carrier, and a second toner layer is used on the surface of the regulating roller to regulate the thickness of the first toner layer. When the toner layer is formed and the image carrier carries the toner image, the regulating roller rotates at a normal speed, and when the image carrier does not carry the toner image, The regulating roller rotates at a recovery speed that is lower than the normal speed.

  According to this configuration, the centrifugal force acting on the regulating roller can be reduced by rotating the regulating roller at a recovery speed set to be lower than the normal speed. Therefore, the toner constituting the second toner layer is prevented from being separated (scattered) from the regulating roller. Further, by rotating the regulation roller at the recovery speed, the toner is held in the regulation roller, and the second toner layer is recovered to an appropriate thickness. Accordingly, the second toner layer on the regulating roller is maintained at an appropriate thickness, and the thickness of the first toner layer on the polishing roller can be adjusted uniformly.

  In this case, it is preferable that the recovery speed is a rotation speed of 1% to 50% of the normal speed.

  According to this configuration, by setting the recovery speed in the range of 1 to 50% of the normal speed, it is possible to suppress the abrasion of the polishing roller and the regulation roller, and stably for each toner layer over a long period of time. The thickness can be adjusted.

  In this case, it is preferable that the time for rotating the regulating roller at the recovery speed is 1 second or more and 60 seconds or less.

  According to this configuration, the toner layers of the polishing roller and the regulation roller can be sufficiently recovered by setting the time for rotating the regulation roller at the recovery speed in the range of 1 to 60 seconds.

  In this case, it is preferable to further include a housing that rotatably supports the polishing roller and the regulating roller, and a tray portion that is provided in the housing and receives toner separated from the regulating roller.

  According to this configuration, the toner that has separated from the regulating roller accumulates on the tray portion. When the regulation roller is rotated at the recovery speed, the toner accumulated on the tray is held by the regulation roller. Thereby, the second toner layer can be efficiently recovered.

  In order to achieve the above object, an image forming apparatus of the present invention includes any one of the cleaning devices described above.

  In order to achieve the above-described object, an image forming apparatus according to the present invention includes the cleaning device according to claim 4 and a control device that controls the cleaning device, and the control device is provided in the saucer section. A toner stacking operation for forcibly feeding toner is executed.

  According to these configurations, since the centrifugal force acting on the regulation roller is reduced by rotating the regulation roller at the recovery speed, the toner constituting the second toner layer is prevented from being detached from the regulation roller. Thereby, each thickness of the 2nd toner layer on a control roller and the 1st toner layer on a grinding | polishing roller can be stabilized.

  According to the present invention, the thickness of each toner layer formed on the surfaces of the polishing roller and the regulating roller can be stabilized.

1 is a cross-sectional view schematically showing an internal structure of a color printer according to an embodiment of the present invention. It is sectional drawing which shows typically the cleaning apparatus which concerns on one Embodiment of this invention. It is a graph which shows the relationship between the 1st toner layer of the grinding | polishing roller of the cleaning apparatus which concerns on one Embodiment of this invention, and the rotational speed of a control roller.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the front side in FIG. 1 and FIG. 2 is the front, and the direction shown in each drawing is used as a reference.

  With reference to FIG. 1, an overall configuration of a color printer 1 as an image forming apparatus will be described. FIG. 1 is a cross-sectional view schematically showing the internal structure of the color printer 1.

  The color printer 1 includes an apparatus main body 2, a paper feed cassette 3, and a paper discharge tray 4. The paper feed cassette 3 is detachably provided at the lower part of the substantially rectangular parallelepiped main body 2. A sheet S (bundle) is accommodated in the sheet feed cassette 3. The paper discharge tray 4 is provided in the upper part of the apparatus main body 2. The sheet S as a recording medium is not limited to paper, but may be a resin film, an OHP sheet, or the like.

  Further, the color printer 1 includes a paper feeding unit 10, an image forming unit 11, a fixing device 12, and a control device 13 in the apparatus main body 2. The paper feed unit 10 is provided on the upstream side of a conveyance path 14 extending from the paper feed cassette 3 to the paper discharge tray 4. The image forming unit 11 is provided in an intermediate portion of the apparatus main body 2. The fixing device 12 is provided on the downstream side of the conveyance path 14. The control device 13 comprehensively controls each component of the color printer 1.

  The image forming unit 11 includes four toner containers 20, an intermediate transfer belt 21, four drum units 22, and an optical scanning device 23. The four toner containers 20 are juxtaposed in the left-right direction below the paper discharge tray 4. The intermediate transfer belt 21 is disposed below each toner container 20. The four drum units 22 are juxtaposed in the left-right direction below the intermediate transfer belt 21. The optical scanning device 23 is disposed below each drum unit 22.

  The four toner containers 20 contain toners (developers) of four colors (yellow, magenta, cyan, black). The toner may be a two-component developer including toner and carrier, or may be a one-component developer made of magnetic toner. The intermediate transfer belt 21 is installed between a pair of left and right rollers so as to run around in the direction of the arrow in FIG.

  The four drum units 22 are provided corresponding to the toners of the respective colors. Each drum unit 22 includes a photosensitive drum 30, a charging device 31, a developing device 32, a primary transfer roller 33, a cleaning device 34, and a charge removal device 35. Since the four drum units 22 have the same configuration, only one drum unit 22 will be described below.

  The photosensitive drum 30 as an image carrier is formed in a cylindrical shape extending in the front-rear direction. The surface of the photosensitive drum 30 includes, for example, an amorphous silicon photosensitive layer. The photosensitive drum 30 is in contact with the lower surface of the intermediate transfer belt 21 and is pivotally supported by the apparatus main body 2. The photosensitive drum 30 is connected to a drive motor 41 via a drive gear train 40 (see FIG. 2). The charging device 31, the developing device 32, the primary transfer roller 33, the cleaning device 34, and the charge eliminating device 35 are arranged around the photosensitive drum 30 in the order of the transfer process. The primary transfer roller 33 faces the photosensitive drum 30 from above with the intermediate transfer belt 21 interposed therebetween. On the right side of the intermediate transfer belt 21, a secondary transfer roller 36 is pressed to form a secondary transfer nip portion N.

  The control device 13 includes an arithmetic processing device, a memory and the like (not shown). Various control objects such as a drive motor 41 and a power source (not shown) are electrically connected to the control device 13. The control device 13 controls various control objects by causing the arithmetic processing device to execute a program or the like stored in the memory.

  Here, the operation of the color printer 1 will be described. Based on the input image data, the control device 13 executes an image forming process as follows.

  The drive motor 41 rotates each photosensitive drum 30 around its axis (see the arrow in FIG. 2). Each charging device 31 charges the surface of the photosensitive drum 30. The optical scanning device 23 performs exposure corresponding to image data (see the broken line arrow in FIG. 1) toward each photosensitive drum 30 to form an electrostatic latent image on each photosensitive drum 30. Each developing device 32 develops the electrostatic latent image into a toner image with the toner supplied from the toner container 20. The four color toner images carried on the four photosensitive drums 30 are primary-transferred sequentially to the intermediate transfer belt 21 by the primary transfer roller 33 to which a primary transfer bias is applied. As a result, a full-color toner image is formed on the surface of the intermediate transfer belt 21.

  On the other hand, the sheet S supplied from the sheet feeding cassette 3 is conveyed through the conveyance path 14 and passes through the secondary transfer nip portion N. The full-color toner image is secondarily transferred to the sheet S by the secondary transfer roller 36 to which a secondary transfer bias is applied. The fixing device 12 fixes a full-color toner image on the sheet S. The sheet S after the fixing process is discharged to the paper discharge tray 4. Each cleaning device 34 removes toner (residual toner) remaining on the surface of the photosensitive drum 30 after transfer. Each static elimination device 35 irradiates the static elimination light to remove the charge on the photosensitive drum 30.

  Next, each cleaning device 34 will be described with reference to FIG. FIG. 2 is a cross-sectional view schematically showing the cleaning device 34.

  The four cleaning devices 34 are arranged on the right side of the corresponding photosensitive drum 30. Since the four cleaning devices 34 have the same configuration, only one cleaning device 34 will be described below.

  The cleaning device 34 includes a housing 50, a polishing roller 51, a regulating roller 52, a cleaning blade 53, and a recovery screw 54.

  The housing 50 is formed in a substantially box shape extending in the front-rear direction. An opening 50 a is formed on the left side surface of the housing 50 (the surface facing the photosensitive drum 30). Residual toner removed from the surface of the photosensitive drum 30 is accommodated in the housing 50.

  A lower portion of the housing 50 is provided with a first housing portion 50b, a second housing portion 50c, and a tray portion 50d. The first housing portion 50b and the second housing portion 50c form the bottom surface of the housing 50, respectively. The 1st accommodating part 50b is arrange | positioned at the opening part 50a side (left side). The 2nd accommodating part 50c is arrange | positioned above the 1st accommodating part 50b on the right side of the 1st accommodating part 50b. The saucer part 50d is provided at a position spaced upward from the second housing part 50c. The first storage portion 50b, the second storage portion 50c, and the saucer portion 50d are each formed in a substantially arc shape that protrudes downward as viewed from the front.

  The polishing roller 51 is formed in a substantially cylindrical shape extending in the front-rear direction. The polishing roller 51 is configured, for example, by covering the surface of a core metal with conductive foamed ethylene rubber (hardness: about 50 to 60 degrees) or the like. The outer diameter of the polishing roller 51 is formed smaller than the outer diameter of the photosensitive drum 30. The polishing roller 51 is supported by the housing 50 so as to be rotatable about an axis. The polishing roller 51 is disposed on the upper left side of the housing 50, and its outer peripheral surface is exposed from the opening 50a.

  The polishing roller 51 rotates while being in contact with (on the surface of) the photosensitive drum 30 carrying the toner image at a portion exposed from the opening 50a. The polishing roller 51 rotates following the photosensitive drum 30 (see the broken line arrow in FIG. 2). A first toner layer R <b> 1 is formed on the surface of the polishing roller 51 by the residual toner removed from the surface of the photosensitive drum 30. The polishing roller 51 (first toner layer R1 thereof) is in sliding contact with the surface of the photosensitive drum 30 at a predetermined linear velocity ratio, and removes residual toner attached to the surface of the photosensitive drum 30. Further, the polishing roller 51 polishes the surface of the photosensitive drum 30 through the first toner layer R1.

  The restriction roller 52 is formed in a substantially cylindrical shape extending in the front-rear direction. The regulation roller 52 is formed of a sponge (hardness: about 10 to 30 degrees) that is softer than the polishing roller 51. The outer diameter of the regulating roller 52 is formed smaller than the outer diameter of the polishing roller 51. The regulating roller 52 is supported by the housing 50 so as to be rotatable around an axis. The regulation roller 52 is disposed on the lower right side of the polishing roller 51. Specifically, the regulation roller 52 is disposed above the tray part 50 d provided in the housing 50.

  The regulating roller 52 rotates while being in contact with the polishing roller 51 (the surface thereof). The regulating roller 52 rotates following the polishing roller 51 (see the broken line arrow in FIG. 2). A second toner layer R <b> 2 is formed on the surface of the regulating roller 52 by the retained toner. The regulating roller 52 (second toner layer R2 thereof) is in sliding contact with the surface of the polishing roller 51 at a predetermined linear velocity ratio, and regulates (adjusts) the thickness of the first toner layer R1 held on the surface of the polishing roller 51. . In addition, the above-described tray part 50d receives the residual toner separated from (the surface of) the regulation roller 52.

  The cleaning blade 53 is formed in a substantially rectangular plate shape extending in the front-rear direction. The cleaning blade 53 is made of a synthetic resin such as polyurethane rubber, for example. The cleaning blade 53 is fixed to the lower portion of the housing 50 and extends upward. The front end portion (free end portion) of the cleaning blade 53 is located at substantially the same height as the lower portion of the polishing roller 51 as viewed from the front. The tip of the cleaning blade 53 is in contact with the counter drum with respect to the rotation direction of the photosensitive drum 30. The cleaning blade 53 scrapes off residual toner adhering to the surface of the photosensitive drum 30.

  The recovery screw 54 is configured by fixing a helical screw blade to a rotating shaft extending in the front-rear direction. The recovery screw 54 is made of, for example, a hard synthetic resin. The recovery screw 54 (rotating shaft) is supported by the housing 50 so as to be rotatable around the axis. The collection screw 54 is disposed below the polishing roller 51 and above the first housing portion 50 b of the housing 50. Further, when viewed from the front, the uppermost point A of the recovery screw 54 is located above the lowermost point B of the regulating roller 52.

  The collection screw 54 is connected to the drive motor 41 via the drive gear train 40. The collection screw 54 rotates in conjunction with the photosensitive drum 30 and conveys the residual toner accommodated in the housing 50 (accumulated on the first accommodating portion 50b) in the axial direction (rearward). Note that a discharge port (not shown) for discharging the residual toner in the housing 50 to a collection container (not shown) is opened at the rear end portion of the first storage portion 50b.

  Although the polishing roller 51 and the regulation roller 52 are rotated by following the photosensitive drum 30, the present invention is not limited to this. For example, in addition to the drive motor 41, one or more other motors that rotate the rollers 50 and 51 and the recovery screw 54 may be provided.

  By the way, as the image forming (printing) speed of the color printer 1 is increased, the photosensitive drum 30, the polishing roller 51, and the regulating roller 52 are rotated at a high speed. For this reason, the residual toner held on the surfaces of the rollers 50 and 51 may be separated (scattered) by centrifugal force, and the thicknesses of the toner layers R1 and R2 may become nonuniform (thinner). When the second toner layer R2 becomes thin, the first toner layer R1 on the polishing roller 51 cannot be uniformly regulated, and the surface of the photosensitive drum 30 may not be properly polished.

  For example, as shown in FIG. 3, when the rotation speed (linear speed) of the regulating roller 52 is about 220 mm / sec or less, the first toner layer R1 formed on the surface of the polishing roller 51 has a substantially constant thickness. It is kept. On the other hand, when the rotational speed (linear speed) of the regulating roller 52 is about 220 mm / sec or more, the thickness of the first toner layer R1 gradually decreases as the rotational speed increases. In particular, it has been experimentally confirmed that when the thickness of the first toner layer R1 is 40 μm or less (the linear velocity of the regulating roller 52: about 350 mm / sec), the surface of the photosensitive drum 30 cannot be properly polished.

  Therefore, in the cleaning device 34 according to the present embodiment, a recovery operation for recovering the first toner layer R1 and the second toner layer R2 is executed.

  First, a normal operation for transferring the toner image carried on the photosensitive drum 30 to the sheet S will be described with reference to FIG. During normal operation, the control device 13 of the color printer 1 drives and controls the drive motor 41 to rotate the photosensitive drum 30 carrying the toner image at a rotation speed suitable for image formation (printing) (linear speed (for example, 230 to Rotate at about 450 mm / sec)). Then, the polishing roller 51 rotates at a high speed following the photosensitive drum 30. The regulation roller 52 is driven by the photosensitive drum 30 via the polishing roller 51 and rotates at a high speed (for example, about 100 to 350 mm / sec). Thus, when the photosensitive drum 30 carries a toner image, the regulating roller 52 rotates at the normal speed V1 (normal linear speed). The rotation speed (normal speed V1 and recovery speed V2 described later) refers to the rotation distance per unit time (movement distance in the circumferential direction of the outer peripheral surface). Therefore, the photosensitive drum 30, the polishing roller 51, and the regulating roller 52 have different outer peripheral speeds (linear speeds) according to the size of the outer diameter.

  Next, a recovery operation for stopping the normal operation and recovering the first toner layer R1 and the second toner layer R2 will be described. The “cancel normal operation” is, for example, when the image forming process is stopped or until the next sheet S is conveyed when continuous printing is performed, and the photosensitive drum 30 generates a toner image. It indicates the case where it is not carried.

  The control device 13 automatically executes the recovery operation at a predetermined timing, for example, when 500 sheets S are continuously printed (image formation). Note that the user may manually instruct execution of the recovery operation by operating an input device (such as a touch panel) of the color printer 1.

  During the recovery operation, the control device 13 controls the drive motor 41 to rotate the photosensitive drum 30 at a lower rotational speed (linear speed) than during normal operation. Then, the polishing roller 51 also rotates at a lower rotational speed than during normal operation. The regulation roller 52 rotates at a low speed following the photosensitive drum 30 via the polishing roller 51. Thus, when the photosensitive drum 30 does not carry a toner image, the regulating roller 52 rotates at a recovery speed V2 (V1> V2) that is lower than the normal speed V1. This recovery speed V2 is set to a rotational speed of 1% to 50% of the normal speed V1. That is, when the normal speed V1 is set to “1”, the recovery speed V2 is set to be “0.01 to 0.5”. This recovery operation is continued until the polishing roller 51 rotates 10 times (about 2 seconds have elapsed). The time for rotating the regulating roller 52 at the recovery speed V2 (recovery operation execution time) is not limited to the above (about 2 seconds), and may be set in the range of 1 second to 60 seconds.

  The data necessary for rotating the regulating roller 52 at the normal speed V1 or the recovery speed V2 (voltage applied to the drive motor 41, etc.), the execution time of the recovery operation (or the rotation speed of the polishing roller 5, etc.), etc. Pre-stored in the memory of the control device 13. In the present embodiment, the control device 13 performs overall control of the color printer 1, but the present invention is not limited to this. For example, the cleaning device 34 may include a control unit that controls the rotation speed of the regulating roller 52.

  According to the cleaning device 34 described above, the centrifugal force acting on the restriction roller 52 can be reduced by rotating the restriction roller 52 at the recovery speed V2 set lower than the normal speed V1. Therefore, the residual toner constituting the second toner layer R2 is prevented from separating (scattering) from the regulating roller 52. Further, residual toner that has separated from the regulating roller 52 that rotates at the normal speed V1 is piled on the tray part 50d. When the recovery operation is executed, the residual toner accumulated in the tray part 50d is held (held) by the regulating roller 52 that rotates at the recovery speed V2. Thereby, the second toner layer R2 can be efficiently recovered. Thereby, the second toner layer R2 on the regulating roller 52 is recovered and maintained at an appropriate thickness, and the thickness of the first toner layer R1 on the polishing roller 51 can be adjusted uniformly.

  The residual toner falls into the housing 50 and is accumulated in each of the accommodating portions 50b and 50c. The lower part of the regulation roller 52 is disposed so as to overlap the upper part of the recovery screw 54 (see the gap G in FIG. 2). For this reason, the regulating roller 52 can hold (hold) the residual toner that the rotating collection screw 54 rolls up.

  Further, according to the cleaning device 34, by setting the recovery speed V2 within the range of 1 to 50% of the normal speed V1, the abrasion of the polishing roller 51 and the regulation roller 52 can be suppressed, and over a long period of time. Thus, the thickness of each toner layer R1, R2 can be adjusted stably. Further, by setting the execution time of the recovery operation in the range of 1 to 60 seconds, the toner layers R1 and R2 of the polishing roller 51 and the regulation roller 52 can be sufficiently recovered.

  When the amount of residual toner on the tray 50d is small (such as when low-density printing continues), the control device 13 automatically performs a toner stacking operation for forcibly sending the residual toner to the tray 50d ( Alternatively, it may be performed according to user instructions. The toner stacking operation is executed after printing (image formation) on 5000 sheets S, for example. In the toner stacking operation, a toner image having a high density (for example, a printing rate of about 50 to 80%) is carried on the photosensitive drum 30 (rotated at a normal speed V1) in substantially the same manner as the image forming process described above. Note that a high density image corresponding to the toner image is stored in advance in the memory of the control device 13. This toner image is not transferred to the sheet S. Next, the cleaning device 34 removes (collects) the high-density toner image on the photosensitive drum 30. Thereby, a fixed amount of residual toner is loaded on the tray part 50d. This development and removal of the toner image is preferably repeated about 10 times, for example. Thereby, the residual toner on the tray part 50d is held by the regulating roller 52, and the second toner layer R2 can be efficiently recovered.

  In the description of each embodiment, the case where the present invention is applied to the color printer 1 is shown as an example. However, the present invention is not limited thereto, and the present invention is applied to, for example, a monochrome printer, a copying machine, a facsimile machine, or a multifunction machine. May be.

  The description of the above embodiment shows one aspect of the cleaning apparatus according to the present invention and an image forming apparatus including the same, and the technical scope of the present invention is not limited to the above embodiment. The components in the above embodiment can be appropriately replaced or combined with existing components and the like, and the description of the above embodiment does not limit the content of the invention described in the claims. .

1 Color printer (image forming device)
13 Controller 30 Photosensitive drum (image carrier)
34 Cleaning device 50 Housing 50d Receptacle part 51 Polishing roller 52 Regulating roller R1 First toner layer R2 Second toner layer S Sheet (recording medium)

Claims (7)

A polishing roller that rotates while contacting an image carrier carrying a toner image;
A regulation roller that is disposed obliquely below the polishing roller on the opposite side of the image carrier across the polishing roller and rotates while contacting the polishing roller;
A housing that rotatably supports the polishing roller and the regulating roller;
A cleaning blade fixed to the lower portion of the housing and extending upward, and scraping off the toner adhering to the surface of the image carrier by bringing the tip portion into contact with the image carrier;
A recovery screw that is disposed below the polishing roller and obliquely below the regulating roller, rotates around an axis, and transports the toner contained in the housing in the axial direction ;
The tip of the cleaning blade is located downstream of the contact portion between the image carrier and the polishing roller in the rotational direction of the polishing roller and below the contact portion.
On the surface of the polishing roller, a first toner layer is formed by the toner removed from the surface of the image carrier,
On the surface of the regulation roller, a second toner layer that regulates the thickness of the first toner layer is formed by toner that the collecting screw that rotates rotates .
When the image carrier carries the toner image, the regulating roller rotates at a normal speed,
The cleaning device, wherein when the image carrier does not carry the toner image, the regulating roller rotates at a recovery speed that is lower than the normal speed.   The cleaning apparatus according to claim 1, wherein the recovery speed is a rotation speed of 1% to 50% of the normal speed.   The cleaning device according to claim 1 or 2, wherein the time for rotating the regulating roller at the recovery speed is 1 second or more and 60 seconds or less. Provided below the hand the regulating roller in said housing, further example Bei the pan portion for receiving the toner separated from the regulating roller,
The uppermost point of the recovery screw is located above the lowermost point of the regulating roller,
The cleaning device according to claim 1 , wherein an uppermost end of the tray portion is positioned below an uppermost point of the recovery screw .   In the case where the printing operation for transferring the toner image carried by the image carrier onto the sheet is continuously performed, after the one sheet is conveyed and before the next sheet is conveyed,
  The cleaning device according to claim 1, wherein the regulating roller is rotated at the recovery speed. An image forming apparatus characterized in that a cleaning device according to any one of claims 1 to 5. A cleaning device according to claim 4;
A control device for controlling the cleaning device;
The controller performs a toner stacking operation in which the toner image that is not transferred to the sheet is carried on the image carrier, and the toner image is forcibly sent to the tray unit by causing the cleaning device to collect the toner image. An image forming apparatus that executes the image forming apparatus.

Images