JP2014122931A - Cleaning device, image forming unit, and image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning device capable of suppressing a toner in the cleaning device from melting, an image forming unit, and an image forming apparatus.SOLUTION: A cleaning device includes: a recovery member that comes into contact with the surface of a cleaning target body having a moving surface while rotating to remove a recovery on the surface of the cleaning target body; removing member that comes into contact with the recovery member to remove the recovery recovered by the recovery member from the recovery member; and a discharge member that discharges the recovery separated from the recovery member by the removing member while rotationally feeding the recovery. The removing member is rotatably supported on the downstream side of the recovery member in the direction of rotation of the recovery member with respect to a virtual straight line connecting the rotation center of the recovery member and the rotation center of the discharge member.

Description

  The present invention relates to a cleaning device, an image forming unit, and an image forming apparatus.

  In Patent Document 1, a brush that is in sliding contact with a photosensitive member and an auger that transports toner scraped by the brush in the axial direction are arranged apart from each other, and both ends of rod-shaped flicker bars that contact the brush are fixed to the cleaning housing. An electronic copying machine cleaning device is described in which the distance between the flicker bar and the cleaning housing in the opposing direction of the brush and auger is smaller than the diameter of the auger.

JP-A-7-181853

  An object of the present invention is to provide a cleaning device, an image forming unit, and an image forming device that can suppress melting of toner in the cleaning device.

In order to solve the above-mentioned problem, the cleaning device according to claim 1,
A recovery member that contacts the surface of the cleaning object that moves on the surface while rotating, and removes the recovered material on the surface of the cleaning object;
A concession member that contacts the collection member and removes the collected material collected by the collection member from the collection member;
A discharge member that discharges the collected material that is separated from the recovery member by the removal member while rotating and feeding, and
The removal member is rotatably supported on the downstream side of the recovery member in the rotation direction of the recovery member, rather than a straight line connecting the rotation center of the cleaning member and the rotation center of the discharge member.
It is characterized by that.

The invention according to claim 2 is the cleaning apparatus according to claim 1,
The recovery member is formed by winding a fabric including a base fabric and a plurality of yarns raised on the base fabric around a cylindrical shaft,
The removal member is a rod having a diameter equal to the length of the thread of the recovery member, and the total length is equal to or greater than the width of the region where the thread of the recovery member is formed, and shorter than the cylindrical shaft.
It is characterized by that.

In order to solve the above problem, an image forming unit according to claim 3 is provided.
An image carrier,
A cleaning device for removing the collected material on the image carrier,
The cleaning device includes:
A recovery member that contacts the surface on the image carrier while rotating, and removes the recovered material on the surface of the image carrier;
A removing member that contacts the collecting member and removes the collected material collected by the collecting member from the collecting member;
A discharge member that discharges the collected material that is separated from the recovery member by the removal member while rotating and feeding, and
The removal member is rotatably supported on the downstream side of the collection member in the rotation direction of the collection member, rather than a straight line connecting the rotation center of the collection member and the rotation center of the discharge member.
It is characterized by that.

In order to solve the above problem, an image forming apparatus according to claim 4,
An image carrier,
A developing unit for developing the electrostatic latent image on the image holding member with toner;
A cleaning device for removing the collected material on the image carrier,
The cleaning device includes:
A recovery member that contacts the surface on the image carrier while rotating, and removes the recovered material on the surface of the image carrier;
A removing member that contacts the collecting member and removes the collected material collected by the collecting member from the collecting member;
A discharge member that discharges the collected material that is separated from the recovery member by the removal member while rotating and feeding, and
The removal member is rotatably supported on the downstream side of the collection member in the rotation direction of the collection member, rather than a straight line connecting the rotation center of the collection member and the rotation center of the discharge member.
It is characterized by that.

  According to the first to fourth aspects of the present invention, the toner melting in the cleaning device can be suppressed as compared with the case where the present configuration is not provided.

2 is a schematic cross-sectional view illustrating an example of a schematic configuration of the image forming apparatus 1. FIG. It is a longitudinal cross-sectional view which shows the structure of the cleaning apparatus 18 of this embodiment. It is a figure which shows the result of having measured the accumulation amount of the waste toner in the housing of the cleaning apparatus of an Example and a comparative example. It is a longitudinal cross-sectional view which shows the structure of 18 A of cleaning apparatuses of a comparative example.

Next, the present invention will be described in more detail with reference to the drawings with reference to embodiments and specific examples. However, the present invention is not limited to these embodiments and specific examples.
Also, in the description using the following drawings, it should be noted that the drawings are schematic and the ratio of each dimension and the like are different from the actual ones, and are necessary for the description for easy understanding. Illustrations other than the members are omitted as appropriate.

(1) Overall Configuration and Operation of Image Forming Apparatus (1.1) Overall Configuration of Image Forming Apparatus FIG. 1 is a schematic cross-sectional view showing an example of a schematic configuration of an image forming apparatus 1 according to the present embodiment.
The image forming apparatus 1 includes an image forming unit 10, a paper feeding device 20 attached to one end of the image forming unit 10, and another end of the image forming unit 10. A paper unit 30, an operation information unit 40, and an image processing unit 50 that generates image information from print information transmitted from a higher-level device are configured.

  The image forming unit 10 includes an exposure device 12, a photosensitive unit 13, a developing device 14, a transfer device 15, paper transport devices 16 a, 16 b and 16 c, and a fixing device 17, and is received from the image processing unit 50. The image information is formed as a toner image on the paper fed from the paper feeding device 20.

  The paper feeding device 20 supplies paper to the image forming unit 10. In other words, a plurality of trays for storing sheets of different types (for example, material, thickness, sheet size, and grain) are provided, and sheets fed out from any one of the plurality of trays are stored in the image forming unit 10. It is comprised so that it may supply.

  The paper discharge unit 30 discharges the paper on which the image is output by the image forming unit 10. For this purpose, the paper discharge unit 30 includes a paper discharge tray for discharging the paper after image output. The paper discharge unit 30 may have a function of performing post-processing such as cutting and stapling (stitch binding) on the sheet bundle output from the image forming unit 10.

  The image forming unit 10 is provided with an operation information unit 40. The operation information section 40 is used for inputting various settings and instructions and displaying information. That is, it corresponds to a so-called user interface, and is specifically configured by combining a liquid crystal display panel, various operation buttons, a touch panel, and the like.

(1.2) Configuration and Operation of Image Forming Unit In the image forming apparatus 1 having such a configuration, the tray designated for each sheet printed by the print job in the paper feeding device 20 in accordance with the timing of image formation. The sheet fed out from is fed into the image forming unit 10.

  The photoconductor unit 13 includes a photoconductor drum 131 that is provided in parallel below the exposure device 12 and serves as an image carrier that is rotationally driven. A charger 132, an exposure device 12, a developing device 14, a primary transfer roller 152, and a cleaning device 18 are arranged along the rotation direction of the photosensitive drum 131.

The developing device 14 has a developing housing 141 in which a developer is accommodated. In the developing housing 141, a developing roller 142 disposed to face the photosensitive drum 131 is disposed, and a layer regulating member (not shown) that regulates the layer thickness of the developer is disposed close to the developing roller 142. Has been.
Each developing device 14 is configured in substantially the same manner except for the developer contained in the developing housing 141, and each forms a toner image of yellow (Y), magenta (M), cyan (C), and black (K). To do.

  The surface of the rotating photosensitive drum 131 is charged by the charger 132 and an electrostatic latent image is formed by the latent image forming light emitted from the exposure device 12. The electrostatic latent image formed on the photosensitive drum 131 is developed as a toner image by the developing roller 142.

  The transfer device 15 includes an intermediate transfer belt 151 onto which the color toner images formed on the photoconductive drums 131 of the photoconductor units 13 are transferred, and the color toner images formed on the photoconductor units 13 to the intermediate transfer belt. A primary transfer roller 152 that sequentially transfers (primary transfer) to 151, a secondary transfer roller 153 that collectively transfers (secondary transfer) each color toner image superimposed and transferred onto the intermediate transfer belt 151 to a sheet as a recording medium; It is composed of

Each color toner image formed on the photosensitive drum 131 of each photosensitive unit 13 is intermediated by a primary transfer roller 152 to which a predetermined transfer voltage is applied from a power supply device (not shown) controlled by the image output control unit 11. Electrostatic transfer (primary transfer) is sequentially performed on the transfer belt 151 to form a superimposed toner image in which toner of each color is superimposed.
The superimposed toner image on the intermediate transfer belt 151 is conveyed to a region (secondary transfer unit TR) where the secondary transfer roller 153 is disposed as the intermediate transfer belt 151 moves. When the superimposed toner image is conveyed to the secondary transfer unit TR, a sheet is supplied from the sheet feeding device 20 to the secondary transfer unit TR in accordance with the timing. A predetermined transfer voltage is applied to the secondary transfer roller 153 from a power supply device or the like controlled by the image output control unit 11, and the multiple toner images on the intermediate transfer belt 151 are collectively transferred to the sheet.

  The cleaning device 18 includes a cleaning brush 184 and a cleaning blade 185 disposed in contact with the surface of the photosensitive drum 131, removes residual toner on the surface of the photosensitive drum 131, and stores it in a waste toner container (not shown). to recover. The surface of the photosensitive drum 131 is recharged by the charger 132.

The fixing device 17 includes an endless fixing belt 171 that rotates in one direction, and a pressure roller 172 that contacts a peripheral surface of the fixing belt 171 and rotates in one direction, and the pressure contact between the fixing belt 171 and the pressure roller 172. A nip portion N (fixing region) is formed by the region.
The sheet on which the toner image is transferred by the transfer device 15 is conveyed to the fixing device 17 via the sheet conveying device 16a in a state where the toner image is not fixed. The toner image is fixed on the sheet conveyed to the fixing device 17 by the action of pressure bonding and heating by a pair of fixing belts 171 and a pressure roller 172.

The sheet on which the fixing is completed is sent to the paper discharge unit 30 via the paper transport device 16b.
When outputting images on both sides of the sheet, the sheet conveying device 16c inverts the front and back of the sheet and sends it again to the secondary transfer unit TR in the image forming unit 10. Then, after the toner image is transferred and the transferred image is fixed, the toner image is sent to the paper discharge unit 30. The paper sent to the paper discharge unit 30 is discharged onto the paper discharge tray after undergoing post-processing such as cutting and stapling (needle binding) as necessary.

(2) Configuration and Operation of Cleaning Device (2.1) Configuration of Cleaning Device FIG. 2 is a longitudinal sectional view showing the configuration of the cleaning device 18 according to this embodiment.
The cleaning device 18 includes a housing 181 disposed at a position facing the photosensitive drum 131, a seal member 182 supported at a lower edge portion of an opening provided in the housing 181, and waste collected in the housing 181. A toner collection auger 183 that conveys toner, a cleaning brush 184 as an example of a collection member disposed in contact with the surface of the photosensitive drum 131, and a downstream of the cleaning brush 184 in the rotation direction of the photosensitive drum 131. The cleaning blade 185 and a flicker bar 186 as an example of a removing member disposed in contact with the surface of the cleaning brush 184 while being nipped constitute a main part.
The cleaning device 18 is attachable to and detachable from the image forming apparatus 1 as a photosensitive unit 13 configured as a unit integrated with the photosensitive drum 131 and the like.

  The housing 181 accommodates toner, paper dust or the like removed from the surface of the photosensitive drum 131 by the cleaning blade 185 or the cleaning brush 184, and has an opening at a position facing the photosensitive drum 131. A cleaning blade 185 and a cleaning brush 184 are provided in the opening portion and are in contact with the photosensitive drum 131.

  The seal member 182 is fixedly supported at the lower opening end of the housing 181, seals the gap between the photosensitive drum 131 and the housing 181, and cleans the waste toner collected in the cleaning device 18. Leakage out of the device 18 is prevented. For the seal member 182, for example, a thermoplastic polyurethane film having a thickness of 0.1 mm can be used.

  The toner collection auger 183 is made of a screw, and transports to a waste toner box (not shown) while stirring the waste toner or the like removed from the surface of the photosensitive drum 131 and accommodated in the housing 181.

  The cleaning blade 185 is made of a material having excellent mechanical properties such as wear resistance, chipping resistance, and creep resistance, for example, urethane rubber such as thermosetting polyurethane rubber, and the housing 181 has an L-shaped cross-section. It is fixedly supported by. The tip 185 a of the cleaning blade 185 contacts the surface of the photosensitive drum 131 with a predetermined contact pressure, and removes toner, paper dust, and the like from the surface of the photosensitive drum 131.

  The cleaning brush 184 includes a base fabric, brush bristles 184a having pile yarn as an example of a yarn raised on the base fabric, and a metal shaft 184b. The cleaning brush 184 is a roller wound spirally around the shaft 184b. It is formed in a shape.

In the present embodiment, a brush roller having an outer diameter of the shaft 184b of 19 mm, a fiber diameter of 40 μm, a pile length of 2 mm, and a flocking density of 100,000 / inch ² is used. Further, the contact amount (biting amount) to the surface of the photosensitive drum 131 is adjusted to be 1 mm.
2 is driven in the direction indicated by the arrow B, that is, the direction opposite to the direction of rotation of the photosensitive drum 131 (arrow A), and both opposing surfaces move in the same direction, so-called with mode. It has become. With such a configuration, the brush bristles 184a of the cleaning brush 184 come into contact with the surface of the photosensitive drum 131 and scrape off residual toner or the like adhering to the surface of the photosensitive drum 131. The rotational speed of the cleaning brush 184 is substantially the same as that of the photosensitive drum 131.

A flicker bar 186 is disposed so as to come into contact with the brush bristles 184a of the cleaning brush 184, i.e., pile yarns, and scrapes off waste toner or the like adhering to the bristles 184a. In this embodiment, the flicker bar 186 is formed of a round bar made of metal (SUS) in order to prevent toner or the like from adhering or accumulating on the surface.
The flicker bar 186 has a diameter substantially equal to the pile length of the cleaning brush 184, that is, 2 mm, and has a total length that is equal to or greater than the width of the brush bristles 184a of the cleaning brush 184 and shorter than the shaft 184b.

  The flicker bar 186 has a cleaning brush 184 in the rotation direction of the cleaning brush 184 rather than the straight line L when the straight line L connecting the rotation center O1 of the shaft 184b of the cleaning brush 184 and the rotation center O2 of the toner collection auger 183 is assumed. On the downstream side of 184, it is supported so as to be movable and rotatable while being in contact with the brush bristles 184a of the cleaning brush 184.

(2.2) Operation / Function of Cleaning Device The cleaning device 18 cleans the collected material on the photosensitive drum 131 after the toner image is primarily transferred onto the intermediate transfer belt 151. The collected material includes residual developer (toner and external additives), and foreign matters such as paper dust attached to the photosensitive drum 131 from the paper.
The cleaning brush 184 is in contact with the surface of the photosensitive drum 131 and rotates counterclockwise as shown by an arrow B in FIG. 2 (the photosensitive drum 131 rotates clockwise as shown by an arrow A in FIG. 2). And lift up the collected material on the photosensitive drum 131 so as to be easily removed.
When the amount of toner on the surface of the photosensitive drum 131 is small, toner attached to the cleaning brush 184 is supplied to the surface of the photosensitive drum 131 to reduce the frictional force between the cleaning blade 185 and the surface of the photosensitive drum 131.

  The cleaning blade 185 is removed by scraping off the collected material on the photosensitive drum 131 lifted by the cleaning brush 184.

  The flicker bar 186 contacts the brush bristles 184 a of the cleaning brush 184 while being driven to rotate (following) with the cleaning brush 184, and scrapes off the toner adhering to the surface of the cleaning brush 184.

  The toner collection auger 183 is provided below the housing 181, collects the toner removed by the flicker bar 186 by rotating, and conveys the toner along the rotation axis.

(2.3) Action of Flicker Bar Hereinafter, the action of the flicker bar 186 in the cleaning apparatus 18 according to the present embodiment will be described in detail. Prior to that, problems of the cleaning apparatus of the comparative example will be described with reference to the drawings. To do. In the cleaning device of the comparative example, the same reference numerals are given to the same components as in the present embodiment, and detailed description thereof is omitted.

"Comparative example"
FIG. 4 is a longitudinal sectional view showing a configuration of a cleaning device 18A of a comparative example.
In the cleaning device 18A of the comparative example, the cleaning brush 184 in the rotation direction of the cleaning brush 184 is more than the straight line L in which the flicker bar 187 connects the rotation center O1 of the shaft 184b of the cleaning brush 184 and the rotation center O2 of the toner collection auger 183. The cleaning device 18 is different from the cleaning device 18 according to the present embodiment in that it is fixedly arranged on the upstream side.

The toner blown off from the cleaning brush 184 by the action of the flicker bar 187 flies in the directions of arrows C and D. The toner flying in the direction of arrow D is accommodated below the housing 181 and conveyed to a waste toner box (not shown) while being agitated by the toner recovery auger 183.
On the other hand, the toner flying in the direction of the arrow C gradually accumulates in the space R between the upstream side of the flicker bar 187 and the cleaning blade 185. When the cleaning brush 184 rotates in a state where the toner accumulated in the space R has increased, a part of the toner is melted by frictional heat and penetrates between pile yarns of the brush bristles 184a. There is a risk of sticking down.

  Further, when the amount of toner accumulated in the space R increases, toner cleaning becomes poor. In particular, when a toner band is formed as an image adjustment operation, a large amount of toner may be supplied onto the photosensitive drum 131 and the amount of toner removed by the cleaning device 18A may increase. In this case, the amount of toner accumulated in the space R is very large, and there may be a problem that the toner overflows from the housing 181.

In order to solve this problem, the flicker bar 187 is also rotationally driven in a so-called with mode in which the cleaning brush 184 and the opposing surface move in the same direction. In this case, the amount of toner blown off from the cleaning brush 184 by the action of the flicker bar 187 increases in the direction of the arrow D and decreases in the direction of the arrow C.
With such a configuration, the amount of toner accumulated in the space R can be suppressed, but a gear mechanism and a driving source for rotating the flicker bar 187 are required, resulting in an increase in the number of parts and an increase in the cost of the image forming apparatus. A new problem arises.

"This embodiment"
The flicker bar 186 in the cleaning device 18 according to the present embodiment has a straight line L connecting the rotation center O1 of the shaft 184b of the cleaning brush 184 and the rotation center O2 of the toner collection auger 183, and is more On the downstream side of the cleaning brush 184 in the rotation direction of the cleaning brush 184, the cleaning brush 184 is supported so as to be movable and rotatable while being in contact with the brush bristles 184 a of the cleaning brush 184.
The flicker bar 186 is formed of a metal (SUS) round bar and has a diameter substantially equal to the pile length of the cleaning brush 184, that is, 2 mm. The total length is equal to or larger than the width of the brush bristles 184a of the cleaning brush 184, and the shaft 184b. The configuration is shorter.

  For this purpose, the flicker bar 186 is supported in contact with the base cloth of the cleaning brush 184 and is in contact with the brush bristles 184a of the cleaning brush 184 while being driven (rotated) with the cleaning brush 184. Blow off the toner adhering to the surface while scraping it off.

The toner blown off from the cleaning brush 184 by the action of the flicker bar 186 flies in the direction of arrow C.
The toner collection auger 183 rotates in the direction of the arrow E (clockwise) in FIG. 00, and the toner is dropped so that the wing member 183a of the toner collection auger 183 descends (reference numeral 55). The auger 183 prevents the toner from jumping up.
Therefore, the toner flying in the direction of arrow C is conveyed and stored in a waste toner box (not shown) while being stirred by the toner collection auger 183 on the lower side of the housing 181.

(3) Action and effect “Example”
In the image forming apparatus 1 according to the present embodiment, the amount of waste toner accumulated in the housing 181 of the cleaning device 18 when the image forming operation is continued under the following conditions was measured in comparison with the comparative example.
As a comparative example, the flicker bar 187 is upstream of the cleaning brush 184 in the rotation direction of the cleaning brush 184 with respect to the straight line L connecting the rotation center O1 of the shaft 184b of the cleaning brush 184 and the rotation center O2 of the toner collection auger 183. The image forming apparatus 100 provided with the cleaning device 18 </ b> A that is fixed to the image forming apparatus is used.

(Test conditions)
Printing speed: 75 sheets / minute (A4 paper, monochrome image)
Printing conditions: Monochrome image with an image density of 5% is continuously printed at an external environment temperature of 28 ° C and humidity of 85% RH (relative humidity), and the amount of waste toner accumulated in the housing 181 is measured.

  In the test body, the example and the comparative example have the same configuration except for the cleaning device, and the accumulated amount of waste toner in the housing 181 of the example and the comparative example under the printing conditions described above is measured. The results are shown in FIG.

From this test result, in the cleaning device 18 of the example, the accumulated amount of waste toner in the housing 181 was about 30 g. The accumulated amount is close to the total amount of toner attached to the wall surface in the housing 181 and the toner attached around the toner collection auger 183, and indicates that the toner is discharged from the housing 181.
On the other hand, in the comparative example, the toner accumulated in the housing 181 together with the number of rotations (number of printed sheets) of the photosensitive drum 131 and the toner accumulation amount is about 70 g and is saturated at about 30,000 cycles.
The amount of toner of 70 g is substantially equal to the accumulation amount in which the space R between the upstream side of the flicker bar 187 and the cleaning blade 185 is filled with toner, and if the cleaning brush 184 rotates with the accumulation amount in this toner accumulation state, the frictional heat Then, part of the toner melts and penetrates between pile yarns of the brush bristles 184a, and after the image forming apparatus is stopped, there is a possibility that the temperature is lowered and fixed.

  According to the cleaning device 18 according to the present embodiment, the toner is not accumulated in the space R between the upstream side of the flicker bar 186 and the cleaning blade 185, and the waste toner is stirred from the housing 181 by the toner recovery auger 183. The toner is transported to a waste toner box (not shown), and toner sticking to the cleaning brush 184 and overflow of waste toner from the housing 181 can be prevented.

  As mentioned above, although embodiment concerning this invention was explained in full detail, this invention is not limited to the said embodiment, A various change is made within the range of the summary of this invention described in the claim. Is possible.

For example, although the present embodiment has been described as the cleaning device for the photosensitive unit, the present invention can also be applied to a cleaning device for an intermediate transfer unit provided with an intermediate transfer belt and a cleaning device for a paper transport unit provided with a transport belt.
Further, although the image forming apparatus 1 is described as a printer, it may be a copying machine having a document reading function.

DESCRIPTION OF SYMBOLS 1,100 ... Image forming apparatus 10 ... Image forming part 12 ... Exposure apparatus 13 ... Photoconductor unit 131 ... Photoconductor drum 14 ... Developing apparatus 15 ... Transfer apparatus 16a, 16b, 16c ... paper transport device 17 ... fixing device 18, 18A ... cleaning device 181 ... housing 182 ... seal member 183 ... toner recovery auger 184 ... cleaning brush 185 ... Cleaning blade 185a ... Cleaning blade tip 186 ... Flicker bar 187 ... Flicker bar (comparative example)
20 ... paper feeder 30 ... paper discharge unit 40 ... operation information unit 50 ... image processing unit

Claims (4)

A recovery member that rotates and contacts the surface of the cleaning object that moves on the surface, and recovers the recovered material on the surface of the cleaning object;
A removing member that contacts the collecting member and removes the collected material collected by the collecting member from the collecting member;
A discharge member that discharges by rotating the recovered material removed from the recovery member by the removal member,
The removal member is rotatably supported on the downstream side of the collection member in the rotation direction of the collection member, rather than a straight line connecting the rotation center of the collection member and the rotation center of the discharge member.
A cleaning device. The recovery member is formed by winding a fabric including a base fabric and a plurality of yarns raised on the base fabric around a cylindrical shaft,
The cleaning member is a rod having a diameter equal to the length of the thread of the recovery member, and the total length is equal to or greater than the width of the region of the recovery member where the thread is formed, and shorter than the columnar shaft.
The cleaning apparatus according to claim 1. An image carrier,
A cleaning device for removing the collected material on the image carrier,
The cleaning device includes:
A recovery member that contacts the surface on the image carrier while rotating, and removes the recovered material on the surface of the image carrier;
A removing member that contacts the collecting member and removes the collected material collected by the collecting member from the collecting member;
A discharge member that discharges the collected material that is separated from the recovery member by the removal member while rotating and feeding, and
The cleaning member is supported rotatably on the downstream side of the recovery member in the rotation direction of the recovery member, rather than a straight line connecting the rotation center of the recovery member and the rotation center of the discharge member.
An image forming unit. An image carrier,
A developing unit for developing the electrostatic latent image on the image holding member with toner;
A cleaning device for removing the collected material on the image carrier,
The cleaning device includes:
A recovery member that contacts the surface on the image carrier while rotating, and removes the recovered material on the surface of the image carrier;
A cleaning member that contacts the recovery member and removes the recovered material recovered by the recovery member from the recovery member;
A discharge member that discharges the collected material that is separated from the recovery member by the removal member while rotating and feeding, and
The removal member is rotatably supported on the downstream side of the collection member in the rotation direction of the collection member, rather than a straight line connecting the rotation center of the collection member and the rotation center of the discharge member.
An image forming apparatus.

Images