JP2008015050A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of preventing the back flow of scattered toner and surely collecting the scattered toner when the scattered toner is collected by a filter of a dust collection device. <P>SOLUTION: The image forming apparatus comprises photoreceptors 1Y, 1M, 1C, 1K, developing devices 4Y, 4M, 4C, 4K, a toner suction duct 130, and the dust collection device 200. A partition wall 205 is arranged in the dust collection device 200 and an opening/closing member 206 is formed on the partition wall 205. When a suction means 230 is driven, the opening/closing member 206 is opened by differential pressure and scattered toner is collected by the filter 221. When a vibration means 240 of the filter 221 is driven, the filter 221 is vibrated and stuck toner is peeled off, dropped and collected to a collection part 250. Since the opening/closing member 206 is formed, air can be prevented from flowing backward over the partition wall 205 and the toner can be collected to the collection part 250. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image forming apparatus using an electrophotographic system, and more particularly to collection of scattered toner generated in the image forming apparatus.

  In an image forming apparatus using an electrophotographic method, the surface of an image carrier such as a photosensitive drum is uniformly charged, and an electrostatic latent image is formed by forming an original image on the surface of the image carrier with laser light or the like. The toner is developed with toner to form a toner image, which is transferred onto a sheet as a recording medium, and the toner is heated and melted and fixed by a fixing device.

  The toner includes a one-component magnetic developer made of a magnetic toner and a two-component developer made by mixing a magnetic carrier and toner. Here, the toner includes both.

  In the image forming apparatus, ozone is generated from the corona charger along with the corona discharge, and toner is scattered from the developing apparatus during the developing operation. However, these ozone and toner have an undesirable effect on the environment and image quality. It is known to give.

  Concerning ozone, a configuration has been proposed in which the configuration of the corona charger is devised, the generated ozone is forcibly sucked by a suction fan, and an odor is removed by a filter provided along the way.

  For scattered toner, a configuration in which a suction port of a toner suction duct is provided at a position where the developing device is close to the surface of the photoreceptor is known. The sucked scattered toner flies through the toner suction duct, enters a wide suction chamber, and is captured by a filter provided on the suction fan side of the suction chamber.

  However, when a large amount of scattered toner is captured, the filter is clogged, the suction force is decreased, and the scattered toner capturing ability is decreased.

  In view of this, Patent Document 1 (Japanese Patent Laid-Open No. 10-240086) proposes a dust collecting device having a configuration in which a filter is inclined in an air flow path. By disposing the filter obliquely, the toner trapped on the filter can easily slide off the filter surface due to vibrations when the machine is stopped, and clogging can be prevented.

However, in the dust collecting apparatus of Patent Document 1, the scattered toner floating in the flow path has a problem that when the fan stops, it flows backward and returns to the image forming unit.
JP-A-10-240086

  SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and an object of the present invention is to provide an image forming apparatus including a dust collecting device that can prevent the backflow of scattered toner.

  In order to achieve the above object, an image forming apparatus of the present invention suctions an image carrier, a developing device for developing a latent image on the image carrier with toner, and scattered toner generated in the vicinity of the developing device. A dust collecting device, suction means for sucking air in the dust collecting device, and a filter for adsorbing scattered toner provided in the dust collecting device, upstream of the filter of the dust collecting device An opening / closing member is provided on the side to switch the air flow in the dust collector between a shut-off state and a flow state.

  A configuration is provided in which a recovery unit for storing toner dropped from the filter is provided at the lower portion of the filter, a configuration in which the recovery unit is detachably attached to the dust collector, or the filter is attached to the filter holder. The filter holder is attached and configured to be detachable from the dust collector, or the collection unit and the filter holder are configured to be detachable from the dust collector integrally. A configuration in which vibration means for vibrating is provided, or when the suction means sucks air in the dust collector, the opening and closing member is configured to make the air flow in the dust collector flow, or the opening and closing The member is configured to open due to a differential pressure generated when the suction means sucks air in the dust collector and to bring the air flow in the dust collector into a circulation state. The closing member may be or a structure provided in the device main body of the dust collector.

  According to the present invention, since the opening / closing member is provided in front (upstream side) of the filter of the dust collector, the scattered toner is sucked only when the opening / closing member is open, and when the opening / closing member is closed, the scattered toner It is possible to reliably recover by preventing backflow.

  When the filter is vibrated by the vibration means, the toner adhering to the filter can be peeled off and dropped from the filter, so that the filter can be prevented from being clogged. If there is a recovery unit at the lower part of the filter, the dropped toner can be accommodated in the recovery unit.

  When the collecting unit is detachable from the dust collecting device, the toner collected by the collecting unit can be easily taken out from the dust collecting device. If the filter is detachable from the filter holder and the filter holder is detachable from the dust collector, the filter can be easily replaced. By integrating the filter holder and the collection unit, the collection unit can be easily taken out.

  When the suction device is sucking, the opening / closing member is opened to bring the air flow into a circulating state, whereby the scattered toner can be captured by the filter. If the opening and closing member is opened by the differential pressure generated by the suction of the suction device, the opening and closing member can be opened when necessary with a simple configuration. When the suction device is stopped, the opening and closing member is closed to close the toner. Backflow can be prevented. If the opening / closing member is provided in the main body of the dust collector, the range of selection of a mechanism for opening / closing the opening / closing member is widened.

  By stacking a plurality of the filters, it is possible to reliably capture the scattered toner. Further, the filter can be easily replaced by attaching the filter to the filter holder and making the filter holder detachable from the toner suction duct.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a diagram showing a configuration of an image forming apparatus as an embodiment of the present invention. However, the duct block and the dust collector are omitted for convenience. As shown in FIG. 1, this image forming apparatus is called a tandem type color image forming apparatus, and includes an automatic document feeder 30, an image reading device 60, image writing devices 3Y, 3M, 3C, 3K, and an image carrier. Photoconductors 1Y, 1M, 1C, and 1K, chargers 2Y, 2M, 2C, and 2K, developing devices 4Y, 4M, 4C, and 4K, a fixing device 24, an image carrier 6 including an intermediate transfer belt, and a paper feed cassette 20a. , 20b, 20c, a conveyance system 22 and the like.

  5Y, 5M, 5C, and 5K are toner replenishing units that replenish new toner to the developing devices 4Y, 4M, 4C, and 4K, respectively.

  The automatic document conveying means 30 is means for automatically conveying a double-sided or single-sided original d. The image reading device 60 is a device that reads image information by a scanning optical system. The image reading device 60 reflects the contents of a large number of originals d fed from the original placement table by three movable mirrors 60c, and collects the condensing lens 60b. Thus, an image is formed on the image sensor 60a made of a CCD and read.

  The image forming unit 10Y that forms a yellow image includes a charger 2Y, an image writing device 3Y, a developing device 4Y, and a cleaning device 8Y that are arranged around a photoreceptor 1Y as an image carrier. The image forming unit 10M that forms a magenta image includes a charger 2M, an image writing device 3M, a developing device 4M, and a cleaning device 8M around a photoconductor 1M as an image carrier. The image forming unit 10C that forms a cyan image includes a photoreceptor 1C as an image carrier, a charger 2C, an image writing device 3C, a developing device 4C, and a cleaning device 8C. The image forming unit 10K that forms a black image includes a photoreceptor 1K as an image carrier, a charger 2K, an image writing device 3K, a developing device 4K, and a cleaning device 8K. The charger 2Y and the image writing device 3Y, the charger 2M and the image writing device 3M, the charger 2C and the image writing device 3C, and the charger 2K and the image writing device 3K constitute a latent image forming unit for each color. To do.

  The image carrier 6 as an intermediate transfer belt is an endless belt, is stretched by a plurality of rollers, and is rotatably supported. The image carrier 6 is provided with a cleaning device 9, and the cleaning device 9 includes a cleaning roller and a cleaning blade.

  A signal of image information formed on the image sensor 60a is sent to an image processing unit (not shown). The image processing unit performs analog processing, A / D conversion, shading correction, image compression processing, and the like, and then sends a signal for each color to the image writing devices 3Y, 3M, 3C, and 3K.

  In the image writing apparatuses 3Y, 3M, 3C, and 3K, a semiconductor laser is used as a laser light source, and a light beam emitted from the semiconductor laser is formed into a scanning light beam by an optical element such as a polygon mirror to be used as a photosensitive body as a scanning object. It enters the bodies 1Y, 1M, 1C, and 1K, and forms an electrostatic latent image of each color.

  The respective color images formed by the image forming units 10Y, 10M, 10C, and 10K are sequentially transferred onto the rotating image carrier 6 by transfer devices 7Y, 7M, 7C, and 7K as primary transfer devices (1). Next transfer), a synthesized color image is formed. The paper P accommodated in the paper feed cassettes 20a, 20b, and 20c is fed by the paper feed means 21a, 21b, and 21c, passes through the transport system 22, and is timed by the registration roller 23 as a secondary transfer device. The color image is transferred onto the paper P by being conveyed to the transfer device 7a (secondary transfer). The sheet P on which the color image has been transferred is subjected to fixing processing by the fixing device 24, is sandwiched between the sheet discharge rollers 25, and is placed on the sheet discharge tray 26 outside the apparatus.

  On the other hand, after the color image is transferred onto the paper P by the transfer device 7a, the image carrier 6 from which the paper P has been separated is cleaned by the cleaning device 9.

  2 is an enlarged view showing portions of the image forming unit and the dust collecting device in FIG. 1, and FIG. 3 is a further enlarged view of the uppermost duct block 100Y and its periphery in FIG.

  The four color image forming units of yellow (Y), magenta (M), cyan (C), and black (K), the image carrier 6 as an intermediate transfer member, and the like are mounted on a process stand (not shown). This process base can be taken in and out in a direction perpendicular to the paper surface via a rail (not shown) provided on the apparatus main body 210 side. The chargers 2Y, 2M, 2C, and 2K can also be attached and detached in the direction perpendicular to the paper surface.

  The duct block 100Y is disposed between the charger 2Y of the yellow (Y) image forming unit and the developing device 4Y. Similarly, the magenta (M) image forming unit includes the duct block 100M, the cyan (C) image forming unit includes the duct block 100C, and the black (K) image forming unit includes the duct block 100K. Each is arranged. In the following description, the duct block 100Y provided between the charger 2Y and the developing device 4Y will be described, but the other duct blocks 100M, 100C, and 100K have the same configuration unless otherwise specified. In the following description, the duct blocks 100Y, 100M, 100C, and 100K are collectively referred to as the duct block 100. Similarly, the photosensitive member, the charger, and the developing device are also collectively referred to as the photosensitive member 1, the charger 2, and the developing device 4, respectively.

  The duct block 100 has a structure in which three ducts 110, 120, and 130 divided by partition walls 101, 102, 103, and 104 are layered.

  The air introduction duct 120 in the middle is a duct for guiding the outside air into the charger 2, and the ozone suction duct 110 formed on the air introduction duct 120 is the ozone that is emitted from the charger 2 (with the operation of the corona discharge electrode). This is a duct for removing and discharging from the charging device 2 or its surroundings.

  The ozone suction duct 110 is formed between a partition wall 101 at the top of the duct block 100 and a partition wall 102 that serves as a boundary between the air introduction duct 120. The suction port of the ozone suction duct 110 is located downstream of the charger 2 when viewed in the rotation direction (counterclockwise) of the photoreceptor 1.

  Attaching means for attaching the charger 2 is located near the photosensitive member 1 of the partition wall 103. With the charger 2 attached, a space is provided between the bottom surface of the charger 2 and the partition wall 103 facing the back thereof. 121 is formed. A hole is formed in the bottom surface of the charger 2, and the air supplied from the air introduction duct 120 passes through the charger 2 and reaches the photoreceptor 1.

  The air introduction duct 120 is connected to another duct provided in the process frame. This duct is provided with a fan or the like, and sends outside air to the photosensitive member 1 through the charger 2.

  The lower developing device 4 having the same shape as the lower surface of the duct block 100 (specifically, the lower surface including the partition wall 103 portion inclined obliquely to the left) and the lower surface of the partition wall 103. With this upper surface, a passage 105 for discharging scattered toner that communicates with the developing region of the lower photoconductor 1 is formed. A seal 104 a that closes the upper surface of the lower developing device 4 is provided at the tip of the partition wall 104. The toner suction duct 130 of the duct block 100 below the upper developing device 4 sucks scattered toner generated between the lower photoconductor 1 and the developing device 4.

  The scattered toner generated between the uppermost photoreceptor 1Y and the developing device 4Y is sucked by a toner suction duct 131 formed along the upper surface of the developing device 4Y.

  One end portions of the ozone suction duct 110 and the toner suction duct 130 for discharging the toner are opened and connected to the dust collector 200 shown in FIG.

  FIG. 4 is a perspective view showing an internal structure by removing a side plate that is a front cover of the dust collector 200. The photoconductor 1 has a cylindrical shape extending in a direction perpendicular to the paper surface of FIG. 1, and a dust collector 200 is disposed on one end side, in this embodiment, on the back side when the process frame is pulled out.

  As shown in FIGS. 2 and 4, the dust collector 200 includes an apparatus main body 210 and a filter holder 220. The apparatus main body 210 has one connection port 211 on the upper side and four connection ports 212, 213, 214, and 215 on the left side. A toner suction duct 131 is connected to the connection port 211. To the connection port 212, the toner suction duct 130 and the ozone suction duct 110 of the duct block 100Y under the developing device 4Y are connected. Similarly, the toner suction duct 130 and the ozone suction duct 110 of the duct block 100M below the developing device 4M are provided at the connection port 213, and the toner suction duct 130 of the duct block 100C below the development device 4C is provided at the connection port 214. And the ozone suction duct 110 are connected to each other. Only the ozone suction duct 110 for discharging ozone in the duct block 100K under the developing device 4K is connected to the lowermost connection port 215.

  In the present invention, a plurality of filters 221 are attached to the filter holder 220, and the filter holder 220 is detachable from the apparatus main body 210. The right side surface of the apparatus main body 210 is a substantially rectangular opening 218 from which the filter holder 220 is inserted. When the filter holder 220 is inserted from the opening 218 and fitted in a predetermined position, the opening 218 is airtightly closed.

  The apparatus main body 210 has a partition wall 205 in the middle, whereby the inside of the apparatus main body 210 is divided into a space 216 and a space 222. A plurality of through holes 205 a are formed in the partition wall 205, and a plurality of opening / closing members 206 that open and close each through hole 205 a are fixed to the space 222 side of the partition wall 205. The opening / closing member 206 includes a fixed portion 206a fixed to the partition wall 205 and a door portion 206b hinged to the fixed portion 206a.

  The filter holder 220 has an opening 223 that overlaps with the suction port 219 of the apparatus main body 210, and a suction fan is connected to the suction port 219 as the suction means 230. A vibration means 240 for applying vibration to the filter 221 is attached to the lower part of the outer wall 210 a forming the apparatus main body 210. A box-shaped collection unit 250 that receives the dropped toner is provided below the filter 221 in the apparatus main body 210.

  Air sucked from the connection ports 211, 212, 213, 214, 215 passes through the through hole 205 a of the partition wall 205 and the opening / closing member 206 from the space 216, is filtered by the filter 221, and is discharged to the outside from the suction port 219. Is done. The filter 221 serves as both a toner adsorption filter and a filter containing activated carbon for ozone removal, and is formed by stacking a plurality of sheet-like filters in parallel. A large number of adsorption surfaces 221a of the filter 221 are formed in layers, and the total area of the adsorption surfaces 221a is increased, and the dust collection capacity can be increased.

  The vibration means 240 is configured to apply vibration to the filter 221 by rotating a disk-shaped weight 241 attached eccentrically to the motor. Since the vibration means 240 is attached to the outside of the outer wall 210 a of the apparatus main body 210, the vibration means 240 does not communicate with the inside of the apparatus main body 210 and is cut off at the edge. Therefore, the toner in the apparatus main body 210 does not enter the vibration unit 240. For this reason, it is possible to prevent the vibration unit 240 from being contaminated with toner, or the adhered toner from becoming hard and causing a failure of the vibration unit 240.

  Since the shaft of the motor of the vibration means 240 is in the horizontal direction, the eccentrically attached weight 241 moves circularly and gives vibrations having vertical and horizontal components to the apparatus main body 210, and this vibration is filtered. 221 is transmitted. The vibration means 240 is not limited to the structure of the embodiment, but the adsorption surface 221a of the filter 221 is in the vertical direction, so that it is adsorbed on the adsorption surface 221a of the filter 221 by the vertical component of vibration. The scattered toner is easily dropped.

  By providing a plurality of sheets, the filter 221 has a large number of suction surfaces 221a arranged in layers with a slight gap. The toner that has not been absorbed by the first suction surface 221a is the second, third,... The chance of being adsorbed by any one of the plurality of adsorbing surfaces 221a increases, and the possibility of being captured increases as the number of filters increases.

  FIG. 5 shows a state where the fan as the suction means 230 rotates and the air in the filter holder 220 is sucked. Since the pressure in the filter holder 220 is lower than the pressure in the space 216 due to the operation of the suction means 230, the air moves from the space 216 into the filter holder 220 through each through-hole 205a, thereby the door portion 206b. Is pushed open. When the suction means 230 stops, the door 206b hangs down and closes the through hole 205a.

  FIG. 6 shows a state where the filter holder 220 and the collection unit 250 are pulled out from the apparatus main body 210. The filter holder 220 can be inserted into or removed from the opening 218 on the right side shown in FIG. The filter holder 220 is mounted in a substantially airtight state in the space 222 of the holder housing portion of the apparatus main body 210. When the filter holder 220 is taken out, the collection unit 250 can also be taken out.

The scattered toner is collected as follows.
The suction unit 230 is activated along with the start of image formation. When image formation starts, the photoreceptor 1Y rotates counterclockwise, and the charger 2Y uniformly charges the surface of the photoreceptor 1Y by corona discharge. The charged surface of the photoreceptor 1Y is irradiated with a laser beam from the image writing device 3Y along the writing optical path to form a yellow electrostatic latent image on the photoreceptor 1Y. Thereafter, an electrostatic latent image of each color is formed as described with reference to FIG. 1 to form a toner image, which is transferred to an image carrier 6 as an intermediate transfer member, formed on a sheet, and fixed by a fixing device 24. Is done.

  In such an image forming process, when the photoreceptor 1Y rotates, the air on the surface of the photoreceptor 1Y moves together to generate a surface layer flow. Further, ozone is generated from the charger 2Y. The generated ozone rides on the surface layer flow and flows toward the lower part of the developing device 4Y.

  The flow of ozone riding on the surface flow toward the lower part of the developing device 4Y is sucked by the negative pressure of the ozone suction duct 110 and enters the space 216 of the dust collector 200. In the dust collector 200, since the suction means 230 is operating, the pressure in the space 222 decreases, the lower end of the door portion 206b of the opening / closing member 206 is separated from the through hole 205a, and the opening / closing member 206 is opened. The sucked air passes through the opened opening / closing member 206 and reaches the filter 221. The ozone in the air is removed by the activated carbon for ozone removal contained in the filter 221, and the air without ozone is discharged outside the apparatus.

  On the other hand, scattered toner generated between the uppermost photoreceptor 1 </ b> Y and the developing device 4 </ b> Y is sucked by the negative pressure of the toner suction duct 131 and enters the dust collector 200. The scattered toner generated between the second and subsequent photoreceptors 1 and the developing device 4 enters the passage 105 of the duct block 100 below the upper developing device 4 and passes through the toner suction duct 130 communicating therewith. Then, like ozone, it passes from the space 216 in the dust collector 200 through the opened opening / closing member 206 and reaches the filter 221, and the toner is captured by the adsorption surface 221 a of the first filter 221. The toner that has passed through the first suction surface 221a is sucked by any one of the second, third,... And subsequent suction surfaces 221a.

  Since the ozone suction duct 110 and the toner suction duct 130 suck air near the charger 2Y, the vicinity of the charger 2Y has a low pressure. Therefore, outside air is introduced from the air introduction duct 120. Since these three ducts are separated and arranged in an orderly manner, it is possible to control three winds, that is, a wind containing ozone, a wind containing scattered toner, and a wind supplied from outside.

  Since scattered toner adheres to the suction surface 221a of the filter 221, if left unattended, it will eventually become clogged and the filter function will be lost. Therefore, the vibration means 240 is operated to vibrate the apparatus main body 210, and this vibration is transmitted to the filter 221. Due to the transmitted vibration, the toner adhering to the suction surface 221a is peeled off and falls and accumulates in the toner recovery unit 216a. The clogging of the filter 221 can be prevented by the toner peeling.

  When the suction unit 230 is in operation, the toner is attracted to the filter 221 with a strong force and does not easily peel off. Therefore, for example, when the image is not formed, the suction unit 230 is stopped. When the suction unit 230 is stopped, the toner adhered by the vibration of the vibration unit 240 falls and enters the collection unit 250. Since the opening / closing member 206 closes the through hole 205 a, the backflow of air is prevented, and the toner that has been peeled off from the filter 221 can be prevented from moving toward the space 216.

  Since a plurality of the filters 221 are provided, it is possible to increase the certainty of toner capture. Further, since the suction surface 221a extends in the vertical direction, the separated toner easily falls downward and accumulates in the collection unit 250.

  After a long period of use, the filter 221 will eventually become clogged, and it will be necessary to replace it. In that case, the filter holder 220 is pulled out as shown in FIG. After the filter 221 is replaced outside the image forming apparatus, the filter holder 220 may be inserted from the opening 218. Since the opening / closing member 206 is attached to the partition wall 205, it remains in the apparatus main body 210.

  When the filter holder 220 is pulled out, the collecting unit 250 can also be pulled out, discarding the toner and the like stored inside, emptying it, attaching it to a predetermined position, and loading the filter holder 220 again. It will be.

  If the collection unit 250 is formed integrally with the filter holder 220, the collection unit 250 can be automatically taken out when the filter holder 220 is taken out, and the collection unit 250 can be easily put in and out.

  In the embodiment of the present invention, the opening and closing member 206 is configured to open and close with a differential pressure generated by the operation of the suction means 230, but is not limited thereto. For example, it is assumed that a through hole is formed in a plate in which the opening / closing member 206 is overlapped in parallel with the partition wall 205, and the opening / closing member 206 is advanced and retracted in a direction parallel to the partition wall 205, thereby penetrating both the partition wall 205 and the opening / closing member 206. It can also be opened and closed by overlapping or shifting the holes. An opening / closing device such as a solenoid is used to move the opening / closing member 206. In this case, if the opening / closing member 206 is provided in the device main body 210, the opening / closing device can be attached to the device main body 210. Increase design freedom.

1 is a diagram illustrating a configuration of an image forming apparatus as an embodiment of the present invention. It is an enlarged view which shows the image forming unit and dust collector part of FIG. It is the figure which expanded the uppermost duct block of FIG. 2, and its periphery. It is a perspective view which shows the internal structure of a dust collector. The suction means is in operation and the air in the filter holder is sucked. It is a figure which shows the state which pulled out the filter holder and the collection | recovery part from the apparatus main body.

Explanation of symbols

1, 1Y, 1M, 1C, 1K Photoconductor 4, 4Y, 4M, 4C, 4K Developing device 110 Ozone suction duct 130, 131 Toner suction duct 200 Dust collector 206 Opening / closing member 210 Device body 220 Filter holder 221 Filter 221a Adsorption Surface 230 Suction means 240 Vibration means 250 Recovery part

Claims (9)

  An image carrier, a developing device for developing a latent image on the image carrier with toner, a dust collector for sucking scattered toner generated in the vicinity of the developing device, and sucking air in the dust collector And a suction unit for adsorbing scattered toner provided in the dust collecting device, and the air flow in the dust collecting device is blocked and circulated upstream of the filter of the dust collecting device. An image forming apparatus comprising an opening / closing member for switching between the two.   The image forming apparatus according to claim 1, wherein a recovery unit that stores toner dropped from the filter is provided below the filter.   The image forming apparatus according to claim 2, wherein the collection unit is detachably attached to the dust collector.   The image forming apparatus according to claim 1, wherein the filter is attached to a filter holder, and the filter holder is detachable from the dust collector.   The image forming apparatus according to claim 4, wherein the collection unit and the filter holder are detachably attached to the dust collector.   6. The image forming apparatus according to claim 1, further comprising a vibration unit that vibrates the filter.   The image according to any one of claims 1 to 6, wherein when the suction means sucks air in the dust collector, the opening and closing member makes the air flow in the dust collector flow. Forming equipment.   8. The opening / closing member opens due to a differential pressure generated when the suction means sucks air in the dust collector, and makes the air flow in the dust collector flow. The image forming apparatus according to any one of the above.   The image forming apparatus according to claim 1, wherein the opening / closing member is provided in an apparatus main body of the dust collector.

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