JP6784111B2 - Develop equipment and image forming equipment - Google Patents

Description

The present invention relates to a developing device and an image forming device.

The image forming apparatus adopting the electrophotographic method includes a developing apparatus including a developing roller that develops an electrostatic latent image formed on the surface of the image carrier with a developing agent to form a toner image. The developing roller has a magnet roller and a cylindrical sleeve that covers the outer peripheral portion of the magnet roller.

Due to its structure, the developing roller is generally composed of a region where the end portion in the axial direction of the developing roller has no magnetic force. Therefore, the undeveloped developer tends to scatter at the end of the developing roller.

Therefore, the following documents list techniques for recovering the developer scattered at the end of the developing roller. For example, Patent Document 1 describes a developing device in which a suction port of a suction means is arranged so as to face a non-magnetic region or a weak magnetic region formed at one end of a developing roller. Further, Patent Document 2 describes a developing device in which a cleaning member installed at an end of a suction port that sucks toner scattered from a developing sleeve at a predetermined timing reciprocates in the main scanning direction of the suction port. ..

JP-A-2007-310188 Japanese Unexamined Patent Publication No. 2012-73573

However, the developing devices described in Patent Documents 1 and 2 have the following problems. That is, in Patent Document 1, there is a problem that the toner scattered from the developing roller cannot be sufficiently recovered when the scattering region and the scattering amount of the developer differ depending on the coverage of the image. Further, in Patent Document 2, since cleaning is performed when the consumption of toner concentration becomes equal to or less than the threshold value, it is not possible to suck the scattered toner at a low printing rate (low coverage) where the change in toner concentration is small. There was a problem.

Therefore, in order to solve the above problems, the present invention is to provide a developing device and an image forming device capable of appropriately recovering toner according to image information such as image coverage.

The developing apparatus according to the present invention is provided near a developing roller provided facing the image carrier and a non-magnetic region at the axial end of the developing roller, and sucks the developing agent scattered from the developing roller. A first suction unit having a variable mechanism for changing the suction path for transporting the developer based on the image information of the job, and a first suction unit provided at least in the vicinity of the magnetic region in the axial direction of the developing roller and scattered from the developing roller. When the coverage of the second suction unit that sucks the developer and the image included in the image information is equal to or less than the first coverage, the developer is sucked using the first suction unit before starting printing. When suction is performed and the coverage of the image included in the image information changes to a second coverage larger than the first coverage, the developer is sucked using only the second suction portion before starting printing. It is provided with a control unit for processing.

Further, the image forming apparatus according to the present invention includes the above-mentioned developing apparatus.

According to the present invention, since the suction path of the first suction portion is changed based on the image information, the developer scattered from the developing roller can be reliably sucked.

It is a figure which shows the structural example of the image forming apparatus which concerns on one Embodiment of this invention. It is sectional drawing which shows the structural example of the developing apparatus. It is a top view which shows the structural example of the developing apparatus. It is a block diagram which shows the functional structure example of an image forming apparatus. It is a flowchart which shows the operation example at the time of image formation of an image forming apparatus. It is a figure for demonstrating the operation example of the 1st suction part at the time of printing when an image has low coverage. It is a figure for demonstrating the operation example of the 1st suction part at the time of printing when an image has high coverage. It is a figure which shows the structure of the modification of the 1st recovery part.

Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The dimensional ratios in the drawings have been expanded for convenience of explanation and may differ from the actual ratios.

[Configuration example of image forming apparatus 100]
FIG. 1 shows an example of the configuration of the image forming apparatus 100 according to the present invention. As shown in FIG. 1, the image forming apparatus 100 is called a tandem type image forming apparatus, and includes an automatic document conveying unit 80 and an apparatus main body 102. The automatic document transfer unit 80 is attached to the upper part of the apparatus main body 102, and feeds the paper set on the transfer table to the image reading unit 90 of the apparatus main body 102 by a transfer roller or the like.

The apparatus main body 102 includes an operation display unit 70, an image reading unit 90, an image forming unit 10, an intermediate transfer belt 8, a paper feeding unit 20, a resist roller 32, a fixing unit 44, and an automatic paper reversing transfer unit. It has 60 (Auto Duplex Unit: hereinafter referred to as ADU).

The operation display unit 70 has a touch panel in which a display unit and an input unit are combined, and a plurality of operation keys including a start key and a decision key provided on a peripheral portion of the touch panel. The operation display unit 70 displays a menu screen or the like on the screen, and receives information such as image formation conditions and fixing conditions input by touch operations on the menu screen or operation of operation keys.

The image scanning unit 90 scans and exposes the document placed on the platen or the document conveyed by the automatic document conveying unit 80 by the optical system of the scanning exposure apparatus, and the scanned original image is captured by a CCD (Charge Coupled Device). ) An image information signal is generated by photoelectric conversion by an image sensor. The image information signal is output to the image forming unit 10 after analog processing, analog / digital (hereinafter referred to as A / D) conversion processing, shooting correction, image compression processing, and the like are performed by an image processing unit (not shown).

The image forming unit 10 forms an image by an electrophotographic method, and includes an image forming unit 10Y for forming a yellow (Y) color image, an image forming unit 10M for forming a magenta (M) color image, and the like. It has an image forming unit 10C for forming a cyan (C) color image and an image forming unit 10K for forming a black (K) color image. In this example, a common function name, for example, Y, M, C, and K indicating a color to be formed is added after the reference numeral 10.

The image forming unit 10Y includes a photoconductor drum 1Y, a charger 2Y arranged around the photoconductor drum 1Y, an exposure unit (optical writing unit) 3Y, a developing device 5Y, and a cleaning unit 6Y. The image forming unit 10M includes a photoconductor drum 1M, a charger 2M arranged around the drum, an exposure unit 3M, a developing device 5M, and a cleaning unit 6M. The image forming unit 10C includes a photoconductor drum 1C, a charger 2C arranged around the photoconductor drum 1C, an exposure unit 3C, a developing device 5C, and a cleaning unit 6C. The image forming unit 10K includes a photoconductor drum 1K, a charger 2K arranged around the drum, an exposure unit 3K, a developing device 5K, and a cleaning unit 6K.

Photoreceptor drums (image carriers) 1Y, 1M, 1C, 1K, chargers 2Y, 2M, 2C, 2K, exposed parts 3Y, 3M, 3C, 3K, developed in the image forming units 10Y, 10M, 10C, 10K, respectively. The devices 5Y, 5M, 5C, 5K and the cleaning units 6Y, 6M, 6C, 6K have common contents. Hereinafter, unless a distinction is necessary, Y, M, C, and K are not added.

The charger 2 charges the surface of the photoconductor drum 1 substantially uniformly. The exposure unit 3 is composed of, for example, an LPH (LED Print Head) having an LED array and an imaging lens, or a polygon mirror type laser exposure scanning device, and laser light is applied on the photoconductor drum 1 based on an image information signal. Scan to form an electrostatic latent image. The developing device 5 develops the electrostatic latent image formed on the photoconductor drum 1 with toner. As a result, a toner image, which is a visible image, is formed on the photoconductor drum 1.

The intermediate transfer belt 8 is stretched by a plurality of rollers and is rotatably supported. Along with the rotation of the intermediate transfer belt 8, the primary transfer roller 7 and the photoconductor drum 1 rotate, and a predetermined voltage is applied between the primary transfer roller 7 and the photoconductor drum 1 to obtain a photoconductor. The toner image formed on the drum 1 is transferred onto the intermediate transfer belt 8 (primary transfer).

The paper feed unit 20 has a plurality of paper feed trays 20A and 20B in which paper P such as A3 and A4 is stored. The paper P conveyed from the paper feed trays 20A and 20B by the transfer rollers 22, 24, 26, 28 and the like is conveyed to the resist roller 32. The number of paper feed trays is not limited to two. Further, a single or a plurality of large-capacity paper feeding devices capable of accommodating a large-capacity paper P may be connected as needed.

The resist roller 32 corrects the bending of the paper P by forming a loop by abutting the tip of the paper P with the loop rollers 30. The paper P whose bending of the paper P has been corrected is conveyed to the secondary transfer roller 34 at a predetermined timing. In the secondary transfer roller 34, the Y-color, M-color, C-color, and K-color toner images transferred on the intermediate transfer belt 8 are collectively transferred to the surface of the paper P (secondary transfer). The secondary transferred paper P is conveyed to the fixing portion 44 on the downstream side in the paper traveling direction D.

The fixing portion 44 has a pressure roller and a heating roller. The fixing section 44 presses and heat-treats the paper P on which the toner image is transferred by the secondary transfer roller 34 to fix the toner image on the surface of the paper P to the paper P.

On the downstream side of the paper advancing direction D of the fixing unit 44, a transport path switching portion 48 for switching the transport path of the paper P to the paper discharge path side or the ADU60 side is provided. The transport path switching unit 48 controls the transfer path switching based on the selected print mode (single-sided printing mode, double-sided printing mode, etc.).

The paper P for which single-sided printing has been completed in the single-sided printing mode or the paper P for which double-sided printing has been completed in the double-sided printing mode is ejected onto the output tray by the output roller 46.

Further, when an image is formed on the back surface side of the paper P in the double-sided printing mode, the paper P on which the image is formed on the front surface side is conveyed to the ADU 60 via a conveying roller 62 or the like. In the switchback path of the ADU 60, the paper P is conveyed to the U-turn path section with the rear end of the paper P at the head by the reverse rotation control of the ADU roller 64, and is inverted by the conveying rollers 66, 68 and the like provided in the U-turn path section. In this state, the paper is re-fed to the secondary transfer unit.

[Configuration example of developing device 5]
FIG. 2 shows an example of the cross-sectional structure of the developing apparatus 5. FIG. 3 shows an example of the configuration when the developing apparatus 5 is viewed from the upper surface side.

As shown in FIGS. 2 and 3, the developing apparatus 5 includes a developing roller 500, a doctor blade 510, a first suction portion 530, a second suction portion 520, a third duct portion 540, and toner. It includes a collection unit 550 and a fan 552.

The developing roller 500 is arranged so as to face the photoconductor drum 1. The developing roller 500 has a magnet roller and a cylindrical sleeve that rotatably covers the outer peripheral portion of the magnet roller. The region excluding the axial end of the developing roller 500 corresponds to the image forming region and is a magnetic region that has been blasted. The axial end of the developing roller 500 corresponds to the non-image forming region and is a non-magnetic region that has not been blasted.

Here, the toner scattered from the developing roller 500 has a different scattering location and scattering amount depending on the coverage of the image to be printed. For example, when the coverage of the image is low, the toner tends to scatter to the non-magnetic region on the axial end side of the developing roller 500. This is because, in the case of low coverage, the toner is less replaced in the developing device 5, and a large amount of deteriorated toner is accumulated in the developing device 5. In this case, some toner is scattered even at the end portion of the developing roller 500 in the axial direction, although not as much as the end portion. On the other hand, when the coverage of the image is high, the toner tends to scatter from the entire area (whole) in the axial direction of the developing roller 500. Therefore, in the present embodiment, the toner scattered over the entire axial direction of the developing roller 500 is constantly sucked, and the first suction portion 530 is used according to the coverage of the image so that the developing roller 500 is axially sucked. It is designed to enhance the suction of toner at the edges.

The doctor blade 510 is composed of, for example, a flat plate member, faces the developing roller 500, and is arranged at a certain interval from the developing roller 500. The doctor blade 510 regulates the thickness of the toner layer adhering to the surface of the developing roller 500 to be constant. The doctor blade 510 constitutes an example of the thickness adjusting member.

The first suction unit 530 sucks the toner scattered from the axial end of the developing roller 500 and conveys it to the third duct unit 540. The first suction portion 530 has a duct portion 532 and a shutter 538. The duct portion 532 extends from the vicinity (peripheral portion) of the non-magnetic region formed at the axial end of the developing roller 500 toward the third duct portion 540. Here, the vicinity of the non-magnetic region is located in the region Sa in the vicinity immediately below the doctor blade 510. A suction port 534 facing the surface of the developing roller 500 is provided at the upstream end of the first suction portion 530 in the toner transport direction. At the downstream end of the first suction unit 530 in the toner transport direction, a communication port 536 that communicates with the duct portion 522 described later of the second suction unit 520 is provided.

The shutter 538 opens and closes the communication port 536 of the first suction unit 530 based on the coverage of the image in the job to be executed. For example, the shutter 538 opens when the image has low coverage and causes the first suction unit 530 to suck the toner at the end of the developing roller 500. On the other hand, the shutter 538 closes when the image to be printed has high coverage, and stops the suction of toner by the first suction unit 530. In this case, the toner is always sucked by the second suction unit 520. The shutter 538 constitutes an example of a variable mechanism and an opening / closing member.

The second suction section 520 sucks the scattered toner from substantially the entire axial direction of the developing roller 500 and conveys it to the third duct section 540. The second suction portion 520 has a duct portion 522. The duct portion 522 extends from the entire area including the magnetic region and the non-magnetic region in the axial direction of the developing roller 500 toward the third duct portion 540. A suction port 524 facing the surface of the developing roller 500 is provided on the upstream end of the duct portion 522 in the toner transport direction, in other words, on the upstream side of the developing roller 500 in the rotational direction a. A communication port 526 that communicates with the third duct portion 540 is provided at the downstream end of the duct portion 522 in the toner transport direction. The width of the duct portion 522 (the axial length of the developing roller 500) is configured to be substantially the same as the axial length of the developing roller 500.

The third duct portion 540 is provided between the duct portion 522 constituting the second suction portion 520 and the toner collecting portion 550. The third duct portion 540 has a main body 542 extending in the axial direction of the developing roller 500, and a plurality of partition members 544. The plurality of partition members 544 are erected on the main body 542 at predetermined intervals, and are curved from the communication port 526 side of the second suction portion 520 toward one end portion 542a in the width direction of the main body 542. .. The toner sucked by the duct portions 522 and 532 is conveyed to the toner collecting portion 550 in a state of being uniformly dispersed by the partition member 544.

The toner recovery unit 550 has, for example, a dust collection filter, a collection box, and the like, and is arranged on the downstream side of the third duct unit 540 in the toner transport direction. The toner recovery unit 550 adsorbs the toner conveyed via the third duct unit 540.

The fan 552 is arranged on the rear side of the toner recovery unit 550, and generates an air flow (wind) from each of the first suction unit 530 and the second suction unit 520 toward the toner collection unit 550.

[Example of block configuration of image forming apparatus 100]
FIG. 4 is a block diagram showing an example of the functional configuration of the image forming apparatus 100. As shown in FIG. 4, the image forming apparatus 100 includes a control unit 50 for controlling the operation of the entire apparatus. The control unit 50 has a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). By executing software (program) read from the ROM, the CPU realizes an image forming process including toner recovery control corresponding to image coverage.

A shutter drive motor 560, a fan drive motor 562, and a communication unit 570 are connected to the control unit 50, respectively.

The shutter drive motor 560 is composed of, for example, a stepping motor, a DC brushless motor, or the like, and is driven based on a drive signal supplied from the control unit 50 to open and close the shutter 538.

The fan drive motor 562 is composed of, for example, a DC brushless motor or the like, and is driven based on a drive signal supplied from the control unit 50 to rotate the fan 552.

The communication unit 570 communicates with an information processing device such as a computer connected via a network, receives jobs, data, and the like transmitted from the information processing device, and supplies them to the control unit 50.

[Operation example of image forming apparatus 100]
FIG. 5 is a flowchart showing an example of the operation of the image forming apparatus 100 when sucking the toner scattered from the developing roller 500. 6A and 6B are diagrams for explaining an operation example of the first suction unit 530 when the image to be printed has low coverage. 7A and 7B are diagrams for explaining an operation example of the first suction unit 530 when the image to be printed has high coverage. The fan 552 is turned on and rotated when, for example, the power of the image forming apparatus 100 is turned on or when a job is executed, and a wind for sucking the scattered toner is generated.

The CPU of the control unit 50 realizes the process shown in the flowchart of FIG. 5 by executing the software read from the ROM. As shown in FIG. 5, in step S100, when a job is transmitted from, for example, a computer, the control unit 50 acquires image information included in the job. The image information includes, for example, information such as coverage of an image to be printed, the number of prints, graphic data, text data, and image data. In this embodiment, image coverage information is used as information for determining the toner scattering state. When step S100 is completed, the process proceeds to step S110.

In step S110, the control unit 50 determines whether or not the coverage of the acquired image is 5% or less. That is, it is determined whether or not the image to be printed has low coverage. When the control unit 50 determines that the coverage of the acquired image is 5% or less, the control unit 50 proceeds to step S120.

In step S120, as shown in FIGS. 6A and 6A, the control unit 50 drives the shutter drive motor 560 to open the shutter 538 and strengthens the suction of toner scattered from the axial end of the developing roller 500. Shift to mode. For example, when the image to be printed is switched from high coverage to low coverage, the control unit 50 opens the shutter 538 before starting printing. When step S120 is completed, the process proceeds to step S130.

In step S130, the control unit 50 starts the printing process based on the acquired image information. As a result, as shown in FIGS. 6A and 6B, the communication port 536 is opened by opening the shutter 538 of the first suction unit 530, so that the suction of the scattered toner at the axial end of the developing roller 500 is attracted. Be done stronger. That is, since the suction port 534 of the first suction section 530 has an opening diameter (opening area) smaller than that of the suction port 524 of the second suction section 520, the wind speed at the first suction section 530 becomes large. Along with this, the suction power of the toner also increases. Further, in the second suction portion 520, although the suction port 524 at the axial end of the developing roller 500 is closed by the shutter 538, the suction port 524 in the other region is always open, so that the developing roller 500 The scattered toner is sucked even in substantially the entire axial direction of.

On the other hand, in step S120, when the control unit 50 determines that the coverage of the image included in the acquired image information exceeds 5%, the control unit 50 proceeds to step S140.

In step S140, as shown in FIGS. 7B and 7B, the control unit 50 drives the shutter drive motor 560 to close the shutter 538 and effectively sucks the scattered toner over the entire axial direction of the developing roller 500. Shift to mode. For example, the control unit 50 closes the shutter 538 when the image to be printed is switched from low coverage (first coverage) to high coverage (second coverage). When step S140 is completed, the process proceeds to step S130.

In step S130, the control unit 50 starts the printing process based on the acquired image information. As a result, as shown in FIGS. 7A and 7B, the second suction unit 520 sucks the toner in substantially the entire axial direction of the developing roller 500. In this case, the toner is also sucked at the axial end of the developing roller 500, but it is weaker than the toner suction force of the first suction portion 530. In the present embodiment, such a series of processes is repeatedly executed.

In the above-described embodiment, the image coverage threshold is set to 5%, but the present invention is not limited to this. For example, the user may be able to set an arbitrary value according to the state of toner scattering on the developing roller 500 according to the coverage.

Further, whether or not to use the first suction unit 530 is determined based on the coverage of the image to be printed, but the present invention is not limited to this. For example, instead of the image coverage described above, information such as the number of prints included in the acquired image information, graphic data, text data, and image data can also be used.

Further, two or more of these information including the coverage of the image to be printed can be used in combination. For example, in the control unit 50, when the coverage of the image to be printed is 5% or less and the number of printed images exceeds a predetermined number, a constant amount of scattered toner is applied to the axial end of the developing roller 500. It may be determined that it has accumulated, and the first suction unit 530 may be used.

As described above, according to the present embodiment, when the coverage of the acquired image is low at the time of executing the job, the first suction unit 530 is selected and used, so that the shaft of the developing roller 500 is used. A large amount of toner (toner spill) scattered from the end in the direction can be reliably sucked. At this time, since the second suction portion 520 is also used, it is possible to recover the toner scattered at other than the axial end portion of the developing roller 500. Further, when the coverage of the acquired image is high, only the second suction portion 520 is used, so that the toner scattered from the entire shaft portion of the developing roller 500 can be reliably sucked. As described above, in the present embodiment, since the suction path is changed according to the coverage of the image, the scattered toner can be reliably sucked and collected.

[Other Configuration Example of First Suction Unit 530 (Part 1)]
Further, in the above-described embodiment, the length of the duct portion 532 of the first suction portion 530 is not variable, but the length of the duct portion 532 of the first suction portion 530 (length in the extending direction). ) Can be made variable. For example, the duct portion 532 of the first suction portion 530 has a structure that can be expanded and contracted between the region directly below the doctor blade 510 and the region Sb (see FIG. 2) between the photoconductor drum 1 and the developing roller 500. be able to.

When the image to be printed has low coverage, the control unit 50 extends the duct portion 532 of the first suction unit 530 to the region between the photoconductor drum 1 and the developing roller 500, and the suction port 534 is the photoconductor. It is configured to face the drum 1 side. As a result, the toner spilling on the photoconductor drum 1 side can be reliably sucked. On the other hand, when the image to be printed has a coverage other than low coverage (for example, high coverage), the control unit 50 arranges the duct unit 532 of the first suction unit 530 in the region directly below the doctor blade 510.

[Other Configuration Example of First Suction Unit 530 (Part 2)]
FIG. 8 is a diagram showing an example of another configuration of the first suction unit 530. Since the configurations of the other developing devices 5 and the like are the same as those of the above-described embodiment, the common components are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 8, the first suction portion 530 is configured by each suction path of the end portion of the second suction portion 520 corresponding to the non-magnetic region formed at the axial end portion of the developing roller 500. Will be done. In this configuration, the first suction portion 530 is a wind direction adjusting member for adjusting the direction of the wind flowing from the suction port 534 of the duct portion 532 toward the communication port 536 on the upstream side of the duct portion 532 in the toner transport direction. It is equipped with 590. The wind direction adjusting member 590 is composed of, for example, a plate-shaped member, and one end thereof is rotatably attached to the partition member 544. The wind direction adjusting member 590 constitutes an example of a variable mechanism.

When the image to be printed has low coverage, the control unit 50 narrows the suction port 534 of the duct unit 532 by rotating the wind direction adjusting member 590 in the direction of closing the duct unit 532. That is, the opening area of the suction port 534 is adjusted by the wind direction adjusting member 590 to make it smaller. As a result, the wind flowing into the duct portion 532 at the axial end of the developing roller 500 can be strengthened, and the toner scattered at the axial end of the developing roller 500 can be effectively sucked. On the other hand, when the image to be printed is other than low coverage, the control unit 50 widens the suction port 534 of the duct unit 532 by rotating the wind direction adjusting member 590 in the direction in which the duct unit 532 opens. As a result, the toner scattered over the entire axial direction of the developing roller 500 can be uniformly sucked.

Although the present invention has been described using the embodiments, the technical scope of the present invention is not limited to the scope described in the above-described embodiments. Various changes or improvements can be made to the above-described embodiments without departing from the spirit of the present invention. For example, the image forming apparatus 100 shown in FIG. 1 forms a color image, but the present invention can be applied not only to an image forming apparatus for forming a color image but also to an image forming apparatus for forming a monochrome image. it can.

1,1Y, 1M, 1C, 1K Photoreceptor drum (image carrier)
5,5Y, 5M, 5C, 5K Developing device 50 Control unit 100 Image forming device 500 Developing roller 510 Doctor blade (thickness adjusting member)
520 Second suction part 524 Suction port 530 First suction part 532 Duct part (suction path)
538 Shutter (variable mechanism, opening / closing member)
590 Wind direction adjustment member (variable mechanism)

Claims (7)

A developing roller provided facing the image carrier and
A variable mechanism provided near the non-magnetic region at the axial end of the developing roller, which sucks the developing agent scattered from the developing roller and changes the suction path for transporting the developing agent based on the image information of the job. a first suction unit having,
A second suction portion provided at least in the vicinity of the magnetic region in the axial direction of the developing roller and sucking the developer scattered from the developing roller.
When the coverage of the image included in the image information is equal to or less than the first coverage, the developer is sucked by using the first suction unit before printing is started, and the coverage of the image included in the image information is covered. When changes to a second coverage larger than the first coverage, a control unit that sucks the developer using only the second suction unit before starting printing,
A developing device characterized by comprising. The developing apparatus according to claim 1, wherein the image information is at least one or more information such as a print rate, a number of prints, a graphic, and a text. Claim 1 or 2 is characterized in that the vicinity of the non-magnetic region at the axial end of the developing roller is a region directly below the thickness adjusting member for adjusting the thickness of the developer adhering to the developing roller. The developing apparatus according to. The developing apparatus according to claim 1, wherein the suction port of the second suction portion is provided on the upstream side in the rotation direction of the developing roller. The developing apparatus according to any one of claims 1 to 4 , wherein the variable mechanism is provided in the suction path and includes an opening / closing member that opens and closes the suction path. The variable mechanism according to claims 1 to 4 , wherein the variable mechanism is provided in the suction path and is composed of a wind direction adjusting member for adjusting the direction of the wind for transporting the developer flowing in the suction path. The developing apparatus according to any one item. An image forming apparatus comprising the developing apparatus according to any one of claims 1 to 6 .

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