JP5276828B2 - Cleaning device and image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning device capable of suppressing scattering of a residual toner and cleaning performance deterioration. <P>SOLUTION: The cleaning device includes: a rotating cleaning member 34 disposed facing a roller 29 across an intermediate transfer belt 22; a toner recovery roller 35 that comes in contact with the surface of the rotating cleaning member 34 in an upper position (contact portion) of the cleaning member 34; a recovery housing 36 disposed along the lower outer circumferential shape of the rotating cleaning member 34; a toner receiving part 38 that forms a retention and accumulation cavity 37 on the downstream side of the contact part in the rotating direction of the toner recovery roller; and a cleaning blade 39 that comes in counter contact with the surface of the toner recovery roller 35 on the downstream side of the retention and accumulation cavity 37. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention is mounted on an image forming apparatus such as a copying machine, a printer, a facsimile machine, or a multifunction machine equipped with these functions, and is stretched between a plurality of rollers including at least one tension roller so as to be rotatable. The present invention also relates to a cleaning device that cleans residual toner adhering to the surface of the intermediate transfer belt.

  2. Description of the Related Art Conventionally, in an image forming apparatus that uses an intermediate transfer belt that is rotatably supported between a plurality of rollers including at least one tension roller as a primary transfer body or a secondary transfer body, A device equipped with a cleaning device for removing residual toner adhering to the surface is well known.

  Further, in such a cleaning device, a rotary cleaning member in the form of a roller that removes residual toner on the surface of the intermediate transfer belt by being disposed opposite to the tension roller via the intermediate transfer belt, and the rotary cleaning member A member provided with a biasing member such as a spring that biases the tension roller is known (see, for example, Patent Document 1).

  At this time, the residual toner removed by the rotary cleaning member is electrically recovered by a toner recovery roller that contacts the surface of the rotary cleaning member.

Therefore, as the rotary cleaning member, a fur brush that rotates in the direction opposite to the rotational movement direction of the intermediate transfer belt is adopted, and in order to improve the cleaning performance, a brush fiber having high elasticity and high fineness is used. Moreover, it is preferable to increase the overall brush density.
JP 2005-258167 A

  However, in the cleaning device configured as described above, the bearing portion of the fur brush and the bearing portion of the toner collecting roller are formed of the same member, and the fur brush is mounted with the bearing portion of the toner collecting roller as a rotation fulcrum. The cleaning area is formed by allowing the fur brush to come into contact with the tension roller while following the displacement of the tension roller.

  At this time, if there is a variation in the inner peripheral length of the intermediate transfer belt or a variation in the load of the urging means of the tension roller, for example, if the displacement amount of the tension roller increases, The swing displacement amount of the fur brush to be increased.

  Therefore, when the cleaning housing that supports the fur brush and the toner collecting roller is fixed, the fur brush is oscillated and displaced in the direction in which the gap between the cleaning housing and the surface of the fur brush is widened. As the toner rotates, residual toner collected and accumulated in the cleaning housing may be scattered (toner dropped) to the outside of the cleaning housing.

  In addition, in order to improve the cleaning performance with a fur brush, it is necessary to use a brush fiber having high elasticity and high fineness, and it is necessary to increase the overall brush density and to increase the brush resistance value to increase the bias potential difference. The requirements such as increasing the size can be considered.

  However, if the cleaning property is improved in this way, depending on the setting of the amount of biting between the toner collection roller and the fur brush, brush tightening due to clogging of residual toner between the brush fibers of the fur brush, There has also been a problem that the cleaning performance deteriorates as the diameter decreases.

  In addition, if the amount of biting between the toner recovery roller and the fur brush is increased, the fur brush torque will increase and the brush fibers will become kinked (hair fall, etc.) when left unattended, resulting in poor cleaning and uneven speed due to torque fluctuations. There was a fear.

  Further, at the contact portion between the fur brush and the toner collecting roller, the brush fiber of the fur brush is elastically deformed by the biting of the toner collecting roller into the fur brush. There is a possibility that a part of the residual toner adhering to the surface or a part of the residual toner remaining on the fur brush without being collected may be skipped and cannot be collected.

  In view of the above circumstances, an object of the present invention is to provide a cleaning device that can suppress scattering of residual toner and deterioration in cleaning performance.

The cleaning device of the present invention is a cleaning device that cleans residual toner adhering to the surface of an intermediate transfer belt that is rotatably supported between a plurality of rollers including at least one tension roller.
The cleaning device is disposed opposite to the tension roller via the intermediate transfer belt to remove residual toner on the surface of the intermediate transfer belt, and contacts the surface of the rotary cleaning member to rotate the rotation. A toner collecting roller for electrically collecting residual toner on the cleaning member; and an outer peripheral surface of the toner collecting roller on a downstream side in a rotation direction of the toner collecting roller with respect to a contact portion between the rotating cleaning member and the toner collecting roller. A toner receiving portion that forms a stay accumulation space therebetween, a cleaning blade that contacts the surface of the toner collection roller in the counter direction downstream from the stay accumulation space, and the toner collection so that the stay accumulation space becomes narrower And a drive displacement portion for displacing the roller.

  At this time, it is preferable that the drive displacement portion displaces the toner recovery roller so that a nip amount with the rotary cleaning member is increased.

  In addition, the cleaning device closes the downstream open end of the stay accumulation space and scrapes off the residual toner collected by the toner collecting roller while the tip is elastically deformed in conjunction with the displacement of the toner collecting roller. It is preferable to provide an elastic sealing member that is always in contact so that there is no contact.

  Further, it is preferable that the drive displacement portion rotationally displaces the toner collection roller around a contact portion between the toner collection roller and the cleaning blade.

  At this time, one end of the collection housing extends to the vicinity of the downstream side in the rotation direction of the toner collection roller with respect to the contact portion between the rotary cleaning member and the toner collection roller. It is preferable that the one end of the housing is integrally formed in a bowl shape.

  The recovery housing is formed in a circular arc shape along the outer periphery of the rotary cleaning member, and the other end extends further downstream in the rotation direction of the rotary cleaning member than the lowest end of the rotary cleaning member. Preferably, the other end is formed in a case housing the rotary cleaning member, and the rotary cleaning member extends above an open end edge that is open for contacting the intermediate transfer member. More preferably, it is optimal to cover substantially the entire lower surface of the outer periphery of the rotary cleaning member.

  Further, it is preferable to use a fur brush as the rotary cleaning member, and the cleaning bias output value of the toner collecting roller is higher when the stay accumulation space is at a narrow position than when it is at a wide position. preferable.

  Furthermore, the present invention can provide an image forming apparatus including the cleaning device according to any one of claims 1 to 8.

  The cleaning device of the present invention can suppress the scattering of residual toner and the deterioration of the cleaning performance.

  Next, a cleaning device according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an explanatory view of an image forming apparatus equipped with a cleaning device according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of the cleaning device according to the embodiment of the present invention when the stay accumulation space volume is large. 3 is an enlarged cross-sectional view of the cleaning device according to the embodiment of the present invention when the stay accumulation space volume is small, FIG. 4 is an operation explanatory view of the main part of the cleaning device according to the embodiment of the present invention, and FIG. FIG. 6 to FIG. 9 are explanatory views of the operation of the cleaning device according to the embodiment of the present invention, and FIG. 6 to FIG. 9 are explanatory views of the drive displacement portion used in the cleaning device according to the embodiment of the invention.

  As shown in FIG. 1, a tandem color printer 11 as an image forming apparatus equipped with a cleaning device according to an embodiment of the present invention stores transfer paper (not shown) inside a printer main body 12. A paper feed cassette 13, a paper feed unit 14 that takes out transfer paper from the paper feed cassette 13, and an image formation processing unit 15 that performs image formation processing on transfer paper supplied from the paper feed cassette 13 or a manual feed tray (not shown). A transfer unit 17 that transfers the toner image that has been image-formed by the image forming processing unit 15 while guiding the transfer paper supplied from the paper feed cassette 13 or the manual feed tray along the transfer paper transport path 16, and the toner after transfer. And a fixing unit 18 for fixing the image.

  For example, the image forming processing unit 15 employs a tandem system that performs image forming processing using toner (developer) of four colors of yellow (Y), magenta (M), cyan (C), and black (K). ing. In the following description, only in the case of color designation, the symbol of each arithmetic numeral is attached with a color (Y, M, C, K) in parentheses, and in the common case, only the arithmetic numeral is included. A description will be given with reference numerals.

  The image forming processing unit 15 corresponds to each color (Y, M, C, K), a plurality of toner containers 19 storing replenishing toner, and a print transmitted from each color toner from a personal computer (not shown). A plurality of amorphous silicon-made photosensitive drums 20 that form toner images based on image data included in the data, a plurality of developing devices 21 that supply toner to the respective photosensitive drums 20, and the photosensitive drums 20 are formed. And an endless intermediate transfer belt 22 onto which the toner image is transferred.

  Each photosensitive drum 20 carries a toner image of each color on the surface thereof based on the beam flux emitted from the exposure unit 23 and transfers the toner image to the intermediate transfer belt 22. In addition, it is disposed below the intermediate transfer belt 22. Further, around the photosensitive drum 20, a charger (charging roller) 24, an exposure unit 23, a developing unit 21, a transfer roller 25, a photosensitive member cleaning device 26, and a static eliminator 27 are arranged in the order of the transfer process.

  Each developing device 21 basically has the same configuration and is arranged adjacent to the lower side of the intermediate transfer belt 22 along the rotational movement direction. A detailed description of the configuration of the developing device 21 is omitted.

  The intermediate transfer belt 22 is an endless belt disposed in the printer main body 12 so as to extend in the horizontal direction, and is circulated and driven in accordance with an image forming operation. Further, the toner image transferred onto the intermediate transfer belt 22 is transferred by the transfer unit 17 to the transfer paper conveyed through the transfer paper conveyance path 16 from the paper feed cassette 13 or the manual feed tray. Further, the intermediate transfer belt 22 is installed so as to be rotatable between a pair of rollers 28 and 29, and the tension state is maintained by using one roller 28 as a driving roller and the other roller 29 as a tension roller. . Further, a cleaning device 30 is provided on the side of the intermediate transfer belt 22 to remove residual toner from the surface of the intermediate transfer belt 22 after the transfer unit 17 transfers the toner image onto the transfer paper.

  The transfer sheet on which the toner image has been transferred by the transfer unit 17 is fixed by the fixing unit 18 through the transfer sheet conveyance path 16 and then guided to the end of the transfer sheet conveyance path 16 as the upper surface of the printer main body 12. The paper is discharged toward the shared paper discharge tray 12a. The tension mechanism of the roller 29 employs a known technique, and maintains the tensioned state of the intermediate transfer belt 22 by displacing the intermediate transfer belt 22 in the rotational movement direction (see arrows a and b in the drawing).

  The exposure unit 23 divides each light beam emitted from a plurality of light sources 31 (Y, M, C, K) corresponding to each photosensitive drum 20 (Y, M, C, K) into two. The polarization scanning is performed by polarizers 32 (YM) and 32 (CK) such as polygon mirrors that share the light sources 31 (Y) and (M) and the light sources 31 (C) and (K) as a pair. The light beam is imaged on the photosensitive drum 20 (Y, M, C, K).

  The cleaning device 30 extends in the width direction of the intermediate transfer belt 22 (depth direction perpendicular to the paper surface of FIG. 1 and transfer paper width direction). As shown in FIGS. 2 and 3, the cleaning device 30 rotates near the upper side of the case 33, the rotary cleaning member 34 disposed opposite to the roller 29 via the intermediate transfer belt 22, and the rotary cleaning member 34. A toner recovery roller 35 that contacts the surface of the cleaning member 34; a recovery housing 36 disposed below the rotary cleaning member 34 so as to follow the outer peripheral shape of the rotary cleaning member 34; a rotary cleaning member 34 and a toner recovery roller 35; A toner receiving portion 38 that forms a stay accumulation space 37 between the contact portion and the outer peripheral surface of the toner collection roller 35 on the downstream side in the rotation direction of the toner collection roller 35, and toner collection on the downstream side of the stay accumulation space 37. A cleaning blade 39 that contacts the surface of the roller 35 in the counter direction, and a spira that finally collects residual toner and conveys it to the outside of the case 33. 40, and an elastic sealing member 41 which comes into contact with the leading end of the toner receiving portion 38 so as to close the downstream side in the rotational direction open end of the toner recovery roller 35 dwell storage space 37.

  The rotary cleaning member 34 uses a roller-like fur brush, and rotates in a direction opposite to the rotational movement direction of the intermediate transfer belt 22 by driving of a drive source (not shown). The rotary cleaning member 34 is constantly urged toward the intermediate transfer belt 22 by an urging member (not shown), and follows and displaces in conjunction with the displacement of the roller 29. Thereby, the rotary cleaning member 34 can remove the residual toner on the surface of the intermediate transfer belt 22.

  The toner collection roller 35 rotates in a direction opposite to the rotation direction of the rotary cleaning member 34 by driving of a drive source (not shown) (same or different from the drive source of the rotary cleaning member 34). Further, a cleaning bias is applied so as to electrically collect the residual toner removed by the rotary cleaning member 34 that is in contact with the surface of the rotary cleaning member 34. Further, as shown in FIG. 4, the toner collection roller 35 is rotationally displaced so that the amount of biting of the contact portion with the rotary cleaning member 34 changes with the vicinity of the contact portion with the cleaning blade 39 as the rotation center.

  Specifically, as shown in FIG. 5, in the toner recovery roller 35, power from a drive source (not shown) is transmitted to the support shaft 44 via the timing belt 42 / pulley 43 and the like.

  Since the support shaft 44 is swingably supported by a rotation arm 46 having a rotation shaft 45 fixed in the vicinity of the contact portion between the cleaning blade 39 and the toner collection roller 35, the rotation shaft 45 is The toner recovery roller 35 can be displaced by transmitting power through the timing belt 47 / pulley 48 and rotating in an appropriate direction.

  For example, when the pulley 48 is rotated in the clockwise direction in FIG. 5 by power transmission from a drive source (not shown), the tip of the rotation arm 46 is rotated downward, and the support shaft 44 that rotates the toner collection roller 35 is provided. The rotating shaft 45 is rotated downward in the figure with the rotating shaft 45 as a rotation center. Similarly, when the pulley 48 rotates counterclockwise in FIG. 5 due to power transmission from a drive source (not shown), the tip of the rotation arm 46 returns to rotate upward and supports the toner collection roller 35 to rotate. The shaft 44 rotates upward in the figure with the rotation shaft 45 as a rotation center.

  Thus, by setting the origin position and the downward displacement position, the toner collecting roller 35 is shallowly cut into the rotational cleaning member 34 (origin position) in order to perform the normal cleaning operation shown in FIG. 3 can be displaced to a position (a downward displacement position) that bites deeply into the rotary cleaning member 34 shown in FIG.

  Incidentally, the drive source for rotating the rotation shaft 44 may be different from or shared with the drive source for driving the rotary cleaning body 34 and the toner collection roller 35. When the drive source for rotating the rotation shaft 44 is shared with the drive source for driving the rotary cleaning body 34 and the toner collection roller 35, the pulley 48 described above includes the rotation direction, timing, and rotation of the toner collection roller 35. A clutch mechanism that is turned on / off in consideration of the amount of movement is employed. The displacement mechanism of the toner collection roller 35 is not limited to the above, and may be a gear or the like. However, since the drive system needs to transmit power regardless of the displacement of the toner collection roller 35, the timing belt 42 is used. A drive system is preferred.

  On the other hand, the cleaning bias output value applied to the toner collecting roller 35 is set higher when the stay accumulation space 37 is at a narrow position than when it is at a wide position.

  The collection housing 36 is formed in a circular arc shape along the outer periphery of the rotary cleaning member 34. One end of the collection housing 36 extends to the vicinity of the toner collection roller 35, and the toner collection roller is located downstream of the contact portion between the rotary cleaning member 34 and the toner collection roller 35 in the rotation direction of the toner collection roller 35. A toner receiving portion 38 is integrally formed in a bowl shape so as to form a staying accumulation space 37 between the outer peripheral surface of 35. Furthermore, it is preferable that the other end of the recovery housing 36 extends downstream of the rotational cleaning member 34 in the rotational direction with respect to the lowermost end of the rotational cleaning member 34. At this time, the other end of the collection housing 36 is formed in a case 33 that houses the rotary cleaning member 34, and extends above the open end edge that is opened for the rotary cleaning member 34 to contact the intermediate transfer member. More preferably, it covers the substantially entire lower surface side of the outer periphery of the rotary cleaning member 34.

  The cleaning blade 39 scrapes off the residual toner collected by the toner collecting roller 35 by coming into contact with the surface of the toner collecting roller 35 in the counter direction.

  The elastic seal member 41 closes the downstream open end of the stay accumulation space 37 and does not scrape the residual toner collected by the toner collection roller 35 while the tip portion is elastically deformed in conjunction with the displacement of the toner collection roller 35. The material, thickness, etc. are set so as to be always in contact. As shown in FIGS. 2 and 3, the elastic seal member 41 is provided not only on the case 33 but also on the front end of the toner receiving portion 38. As long as the downstream open end is closed, the present invention is not limited to the above.

  In the above configuration, each color toner image transferred to the surface of the intermediate transfer belt 22 is transferred to transfer paper by the transfer unit 17.

  At this time, the rotary cleaning member 34 follows the bias of a biasing member (not shown) in conjunction with the displacement of the roller 29 and the like.

  Further, the residual toner remaining on the surface of the intermediate transfer belt 22 after the transfer is removed and collected by the cleaning device 30 having the rotary cleaning member 34 disposed to face the roller 29 before the next image forming process.

  Specifically, the rotary cleaning member 34 is rotated in the direction opposite to the rotational movement direction of the intermediate transfer belt 22 by drive transmission of a drive source (not shown).

  As a result, as shown in FIG. 6, residual toner (including paper dust) T remaining on the surface of the intermediate transfer belt 22 is removed by the rotary cleaning member 34 at the contact portion with the intermediate transfer belt 22. The

  Further, as shown in FIG. 7, the residual toner removed by the rotary cleaning member 34 is applied to the toner recovery roller 35 in a state where it is in contact with the toner recovery roller 35, so that the potential difference in the rotation cleaning member 35 is applied. 34 is transferred to the toner collecting roller 35.

  Further, as shown in FIG. 8, the residual toner transferred to the toner recovery roller 35 stays on the downstream side in the rotation direction of the toner recovery roller 35 with respect to the contact portion between the rotary cleaning member 34 and the toner recovery roller 35. After passing through the accumulation space 37, as shown in FIG. 9, it is peeled off from the toner recovery roller 35 by the cleaning blade 39 and discharged to the outside of the case 33 by the spiral 40.

  At this time, even if a part of the residual toner T is bounced off to the downstream side in the rotation direction by the elastic restoring force of the brush fiber of the rotation cleaning member 34 at the contact portion between the rotation cleaning member 34 and the toner recovery roller 35. As shown in FIG. 9, the splashed toner T ′ that has been bounced off is temporarily accumulated in the stay accumulation space 37 closed by the elastic seal member 41 on the downstream side, as shown in FIG. After being collected together with the residual toner T by the toner collecting roller 35, it is peeled off from the toner collecting roller 35 by the cleaning blade 39 and discharged to the outside of the case 33 by the spiral 40.

  Further, since the lower side of the rotary cleaning member 34 is covered by the recovery housing 36 disposed in the vicinity of the outer surface of the rotary cleaning member 34, the minimum amount is between the outer surface of the rotary cleaning member 34 and the case 33. It will be in a state where there is only a gap.

  Therefore, the remaining toner T that has not been completely collected by the toner collecting roller 35 and remains on the rotary cleaning member 34 is located at the other end of the recovery housing 36 (the open end downstream in the rotation direction of the rotary cleaning member 34) below the rotary cleaning member 34. Coupled with the fact that it extends to the vicinity of the side, it does not leak from the collection housing 36 and is collected when it comes into contact with the toner collection roller 35 again.

  On the other hand, as shown in FIG. 2, the toner collecting roller 35 is shallowly inserted into the rotary cleaning member 34 in order to perform a normal cleaning operation, and is deeper than the rotary cleaning member 34 as shown in FIG. It can be displaced to the biting position.

  Accordingly, in a normal cleaning operation, it is difficult for torque increase or hair fall of the rotary cleaning member 34 to occur, the amount of biting between the toner collection roller 35 and the rotary cleaning member 34 is minimized, and the scattered toner T It is possible to secure a wide storage capacity of the stay storage space 37 for storing '.

  Further, in a state where the toner recovery roller 35 is deeply inserted into the rotary cleaning member 34, residual toner remaining inside the rotary cleaning member 34 that cannot be recovered by the normal cleaning operation can be recovered.

  Accordingly, the toner collecting roller 35 is rotated and cleaned by the rotating cleaning member 34 even in a state where the residual toner accumulated in the stay accumulation space 37 is small in accordance with the accumulation state of the residual toner accumulated in the stay accumulation space 37 and the image forming processing timing. As a result, the accumulation space volume of the stay accumulation space 37 can be reduced, the residual toner accumulated in the stay accumulation space 37 can be collected, and the clogging of the rotary cleaning member 34 can be recovered. It is also possible to prevent the cleaning failure.

  In the above embodiment, the cleaning device 30 of the present invention is applied to the color printer 11. However, for example, a copying machine, a facsimile machine, or a multifunction machine equipped with these functions, Of course, the present invention can be applied to all image forming apparatuses.

It is explanatory drawing of the image forming apparatus carrying the cleaning apparatus which concerns on one Embodiment of this invention. It is an expanded sectional view at the time of the residence accumulation space volume in the cleaning device concerning one embodiment of the present invention. It is an expanded sectional view in case the residence accumulation space volume is small in the cleaning device concerning one embodiment of the present invention. It is operation | movement explanatory drawing of the principal part of the cleaning apparatus which concerns on one Embodiment of this invention. It is explanatory drawing of the drive displacement part used for the cleaning apparatus which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the initial state in the cleaning apparatus which concerns on one Embodiment of this invention. It is action | operation explanatory drawing of the intermediate state in the cleaning apparatus which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the final state in the cleaning apparatus which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the final state in the cleaning apparatus which concerns on one Embodiment of this invention.

Explanation of symbols

22 ... Intermediate transfer belt 28 ... Roller 29 ... Roller (tension roller)
34 ... Rotary cleaning member 35 ... Toner recovery roller 36 ... Recovery housing 37 ... Standing accumulation space 38 ... Toner receiving portion 39 ... Cleaning blade 41 ... Elastic seal member

Claims (10)

In a cleaning device for cleaning residual toner adhering to the surface of an intermediate transfer belt stretched between a plurality of rollers including at least one tension roller so as to be rotatable,
The cleaning device is disposed opposite to the tension roller via the intermediate transfer belt to remove residual toner on the surface of the intermediate transfer belt, and contacts the surface of the rotary cleaning member to rotate the rotation. A toner collecting roller for electrically collecting residual toner on the cleaning member; and an outer peripheral surface of the toner collecting roller on a downstream side in a rotation direction of the toner collecting roller with respect to a contact portion between the rotating cleaning member and the toner collecting roller. A toner receiving portion that forms a stay accumulation space therebetween, a cleaning blade that contacts the surface of the toner collection roller in the counter direction downstream from the stay accumulation space, and the toner collection so that the stay accumulation space becomes narrower comprising a drive displacement unit for displacing the rollers, and the toner receiving portion, the contact between the toner recovery roller and the rotary cleaning member Cleaning apparatus characterized by being formed integrally with the eaves-like from one end of the extended recoveries housing to downstream in the rotation direction near the toner recovery roller than min.   The cleaning device according to claim 1, wherein the driving displacement unit displaces the toner recovery roller so that a nip amount with the rotary cleaning member is increased.   The cleaning device closes the downstream open end of the stay accumulation space and prevents the residual toner collected by the toner collecting roller from being scraped off while the tip is elastically deformed in conjunction with the displacement of the toner collecting roller. The cleaning device according to claim 1, further comprising an elastic seal member that is always in contact with the cleaning device.   4. The drive displacement portion rotationally displaces the toner collection roller around a contact portion between the toner collection roller and the cleaning blade as a rotation center. 5. Cleaning device. The collection housing, wherein is formed in a circular arc cross sectional shape along the outer periphery of the rotary cleaning member, and, the other end that is extended downstream in the rotation direction of the rotary cleaning member than the lowermost end of the rotary cleaning member The cleaning device according to any one of claims 1 to 4, wherein The collection housing is formed at a case where the other end is housed in the case where the rotary cleaning member is accommodated, and extends above an open end edge where the rotary cleaning member comes into contact with the intermediate transfer member. the cleaning device according to to any one of claims 1 to 5, characterized in. The cleaning device according to claim 1 , wherein the recovery housing covers substantially the entire lower surface side of the outer periphery of the rotary cleaning member . The cleaning device according to claim 1, wherein the rotary cleaning member is a fur brush . 9. The cleaning bias output value of the toner collecting roller is higher when the stay accumulation space is at a narrow position than when the stay accumulation space is at a wide position. Cleaning device. An image forming apparatus comprising the cleaning device according to claim 1 .

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