JP2006084771A - Image forming apparatus and drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make speed variation small without reference to speed variation characteristics of an image carrier used for image formation by an electrophotographic process. <P>SOLUTION: Based on a driving motor 34 as a driving source generating a driving force for driving and rotating a photoreceptor 7 as an image carrier, a coupling shaft 36 as a transmission member transmitting the driving force from the driving motor 34 to the photoreceptor 7 to rotate, and previously found rotating speed variation information of the coupling shaft 36 speed variation of the coupling shaft 36 is suppressed by adjusting the rotating speed of the coupling shaft 36 to cancel the rotating speed variation of the coupling shaft 36. Consequently, the speed variation can be made small without reference to speed variation characteristics of the photoreceptor 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

  In an image forming apparatus that forms an image by an electrophotographic system (electrophotographic process), rotationally driving an image carrier carrying an electrostatic latent image at a constant speed causes little positional deviation on a recording medium such as paper. This is one of the important factors for obtaining images. If the image carrier has fluctuations in speed, the static elimination beam may be displaced from the target position when forming an electrostatic latent image on the image carrier, or the toner image developed on the image carrier may be a belt or the like. When the image is transferred to a recording medium such as an intermediate transfer member or paper, it is displaced from the target position. As a result, color unevenness or color misregistration of the image occurs.

  Therefore, in Patent Document 1, for the purpose of reducing the speed fluctuation of the image carrier, the phase of the speed fluctuation and the amount of unevenness (velocity fluctuation characteristics) between the image carrier and the drive member are examined in advance, and the information A technique for controlling a drive motor based on the above has been proposed. In Patent Document 1, since drive motor control information is obtained in advance, it is not necessary to mount a speed fluctuation measuring device such as an encoder in the image forming apparatus, and the cost can be reduced accordingly.

JP 2000-330448 A

  However, in the technique of Patent Document 1, since the control information of the drive motor is obtained in advance, that is, the speed fluctuation characteristic is obtained in advance, the speed fluctuation characteristic at that time is changed in advance when the image carrier is replaced or removed. Therefore, the speed fluctuation characteristic of the image carrier is increased in the worst case.

  An object of the present invention is to reduce the speed fluctuation regardless of the speed fluctuation characteristics of an image carrier used for image formation by an electrophotographic process.

  According to the first aspect of the present invention, in an image forming apparatus that performs image formation by an electrophotographic process by rotationally driving an image carrier that carries an electrostatic latent image, a driving force for rotationally driving the image carrier is generated. A rotational speed fluctuation of the transmission member based on the rotational speed fluctuation information of the transmission member obtained in advance, the transmission member that rotationally transmits the driving force from the drive source to the image carrier, and the transmission member obtained in advance. Adjusting means for adjusting the rotational speed of the transmission member so as to cancel.

  According to a second aspect of the present invention, in the image forming apparatus according to the first aspect of the present invention, the image forming apparatus further includes a storage unit that stores rotational speed variation information of the transmission member.

  According to a third aspect of the present invention, in the image forming apparatus according to the first aspect, an input unit for inputting rotational speed variation information of the transmission member, and rotational speed variation information of the transmission member input by the input unit. And a storage unit for storing.

  According to a fourth aspect of the present invention, in the image forming apparatus according to the first aspect, in addition to the rotation speed variation information of the transmission member obtained in advance, the adjustment means obtains the rotation speed variation information of the image carrier obtained in advance. Based on the above, the rotational speed of the transmission member and the rotational speed of the image carrier are adjusted so as to cancel the rotational speed fluctuation of the transmission member and the rotational speed fluctuation of the image carrier.

  According to a fifth aspect of the present invention, in the image forming apparatus according to the fourth aspect of the present invention, the image forming apparatus includes a storage unit that stores rotational speed variation information of the transmission member and rotational speed variation information of the image carrier. To do.

  According to a sixth aspect of the present invention, in the image forming apparatus according to the fourth aspect, an input unit for inputting rotational speed variation information of the transmission member and rotational speed variation information of the image carrier, and input by the input unit And a storage unit for storing the rotational speed fluctuation information of the transmission member and the rotational speed fluctuation information of the image carrier.

  According to a seventh aspect of the present invention, in the image forming apparatus according to any one of the first to sixth aspects, a plurality of the image carriers are provided, and the same number of the drive sources and the transmission members as the image carriers are provided. The plurality of transmission members respectively transmit the driving forces from the plurality of driving sources to the plurality of image carriers.

  According to an eighth aspect of the present invention, in the image forming apparatus according to any one of the first to sixth aspects, the charging unit for charging the image carrier and the toner on the image carrier carrying the electrostatic latent image are provided. A developing unit to be supplied; and a case for holding the image carrier, the charging unit, and the developing unit.

  According to a ninth aspect of the present invention, in the image forming apparatus according to the fourth aspect, a storage unit storing rotational speed fluctuation information of the image carrier, a charging unit for charging the image carrier, an electrostatic latent And a developing unit that supplies toner onto the image carrier carrying an image, and a case that holds the image carrier, the storage unit, the charging unit, and the developing unit.

  According to a tenth aspect of the present invention, there is provided a driving device for rotationally driving an image carrier used for image formation by an electrophotographic process, a driving source for generating a driving force for rotationally driving the image carrier, and the driving source. A rotation member that transmits the driving force from the rotation to the image carrier, and rotation of the transmission member so as to cancel the rotation speed variation of the transmission member based on the rotation speed variation information of the transmission member that is obtained in advance. Adjusting means for adjusting the speed.

  According to an eleventh aspect of the present invention, in the drive device according to the tenth aspect, the adjusting means adds the rotation speed fluctuation information of the image carrier obtained in advance to the rotation speed fluctuation information of the transmission member obtained in advance. Based on this, the rotational speed of the transmission member and the rotational speed of the image carrier are adjusted so as to cancel the rotational speed fluctuation of the transmission member and the rotational speed fluctuation of the image carrier.

  According to the present invention, the speed fluctuation can be reduced regardless of the speed fluctuation characteristics of the image carrier used for image formation by the electrophotographic process. As a result, a high-quality image can be obtained.

  An embodiment of the present invention will be described with reference to the drawings. The present embodiment is an example applied to a color printer as a color image forming apparatus that performs a full color image forming operation by an electrophotographic process.

  FIG. 1 is a longitudinal side view schematically showing a color printer 1.

  As shown in FIG. 1, in a main body case 2 of the color printer 1, a printer engine 3, an optical writing device 4 that emits a light beam, a paper feed cassette 5 that is a recording medium storage unit for storing a recording medium P, A fixing device 6 for fixing the recording medium P on which the toner image is transferred is provided.

  The printer engine 3 is a portion that forms a toner image and transfers the formed toner image to the recording medium P. Around the photoconductor 7 as an image carrier, the photoconductor 7 (7Y, 7C, 7M, 7K). A charging roller 8 serving as a charging unit and a developing device 9 serving as a developing unit that supplies toner to a photoreceptor 7 carrying an electrostatic latent image and visualizes the electrostatic latent image, a cleaning device 10, and a primary unit. The image forming apparatus includes a transfer roller 11, an intermediate transfer belt 12, which is an endless belt, a secondary transfer roller 13, a cleaning device 14, and the like. In the description of the present specification and drawings, Y, C, M, and K subscripts indicate yellow, cyan, magenta, and black colors, respectively, and these subscripts are omitted as necessary.

  The photoconductor 7 is formed in a cylindrical shape and is rotatably provided. A photosensitive layer on which an electrostatic latent image is formed is provided on the outer peripheral surface of the photoreceptor 7. Such a photoreceptor 7 is connected to a driving device 31 described later, and rotates in the direction of the arrow in FIG. 1 by the driving force from the driving device 31.

  The charging roller 8 is disposed in contact with the outer peripheral surface of the photoconductor 7 or is disposed with a small gap from the outer peripheral surface of the photoconductor 7. When a voltage is applied to the charging roller 8 from a power supply unit (not shown), corona discharge is generated between the charging roller 8 and the photoconductor 7, and the outer peripheral surface of the photoconductor 7 is made uniform. Charge.

  The optical writing device 4 emits a light beam corresponding to the image data, and exposes the outer peripheral surface of the uniformly charged photoreceptor 7. By this exposure, an electrostatic latent image corresponding to the image data is formed on the outer peripheral surface of the photoreceptor 7.

  The developing device 9 supplies toner to the photoreceptor 7. The supplied toner adheres to the electrostatic latent image formed on the outer peripheral surface of the photoconductor 7, and the electrostatic latent image on the outer peripheral surface of the photoconductor 7 is visualized as a toner image.

  The intermediate transfer belt 12 is a loop belt formed with a resin film or rubber as a base, and is wound around a drive roller 15, an entrance roller 16, and a tension roller 17, and is driven by a drive motor (not shown). The connected drive roller 15 is driven to rotate and travels in the direction of arrow A in FIG. The entrance roller 16 and the tension roller 17 are driven to rotate by the frictional force with the intermediate transfer belt 12 as the intermediate transfer belt 12 travels in the direction of arrow A.

  The primary transfer roller 11 is disposed on the inner peripheral surface side (inside the loop) of the intermediate transfer belt 12, and the toner image on the photoconductor 7 is intermediated by applying a transfer voltage to the primary transfer roller 11. The image is transferred onto the transfer belt 12. The toner images formed on the respective photoconductors 7 are sequentially transferred and superimposed on the intermediate transfer belt 12 by the action of the primary transfer rollers 11, and a color toner image is formed on the intermediate transfer belt 12.

  The cleaning device 10 cleans the outer peripheral surface of the photoreceptor 7 after the toner image is transferred to the intermediate transfer belt 12. This cleaning removes toner, paper dust, and the like remaining on the outer peripheral surface of the photoreceptor 7 after the toner image is transferred to the intermediate transfer belt 12.

  The color toner image formed on the intermediate transfer belt 12 is transferred to the secondary transfer roller 13 at the timing when the recording medium P is sent to the transfer position where the intermediate transfer belt 12 and the secondary transfer roller 13 are in contact with each other. When the working voltage is applied, it is transferred to the recording medium P. The recording medium P is fed from the sheet feeding cassette 5 and conveyed by the conveying roller 18 and the registration roller 19, and is transferred to the fixing device 6 after the toner image is transferred. The recording medium P to which the toner image has been transferred is subjected to fixing processing by applying heat and pressure in the fixing device 6, and the toner image melted by this fixing processing is fixed to the recording medium P. The recording medium P for which the fixing process has been completed is discharged onto a discharge tray 20 which is a recording medium discharge portion formed on the upper surface portion of the main body case 2.

  The cleaning device 14 cleans the outer peripheral surface of the intermediate transfer belt 12 after the color toner image is transferred to the recording medium P. This cleaning removes toner, paper dust, and the like remaining on the outer peripheral surface of the intermediate transfer belt 12 after the toner image is transferred.

  FIG. 2 is a schematic side view showing the driving structure of the photoconductor 7, and FIG. 3 is a schematic perspective view thereof.

  As shown in FIGS. 2 and 3, each photoconductor 7 is rotationally driven by a driving device 31 around its rotating shaft 7a. The drive device 31 includes a drive motor 32 (32Y, 32C, 32M, 32K) that is a transmission member that transmits a driving force to the rotation shaft 7a of the photosensitive member 7 and a drive motor 34 (a rotation shaft 33 that meshes with the drive gear 32). 34Y, 34C, 34M, 34K) and the like. Such a driving device 31 supplies the driving force of the driving motor 34 as a driving source to the photosensitive member 7 via the driving gear 32. That is, the photoconductor 7 is rotationally driven by the driving force of the driving motor 34 that is transmitted through the driving gear 32 that is a transmitting member.

  The driving device 31 includes a driving motor 34 and a driving gear 32 for each photoconductor 7 and is formed to be detachably integrated with the color printer 1. In other words, the driving device 31 is also detachably formed on each photoconductor 7. As the drive motor 34, for example, a stepping motor or the like that can perform rotation speed control with high accuracy is used.

  The rotating shaft 7a of the photoreceptor 7 is provided with a coupling 35 that is a transmission member that transmits the driving force from the driving gear 32. The coupling 35 rotates integrally with the rotating shaft 7a. Further, at the center of the drive gear 32, a coupling shaft 36, which is a transmission member that is fitted to the coupling 35 and transmits the driving force from the drive motor 34, is provided. The coupling shaft 36 rotates integrally with the drive gear 32. The photoreceptor 7 is provided by fitting the coupling 35 to the coupling shaft 36 of the drive gear 32. When the drive gear 32 is rotationally driven by the drive motor 34, the driving force of the drive motor 34 is transmitted to the photoconductor 7.

  The driving device 31 is provided with a detector 37 and a detector 38 for each photoconductor 7 for adjusting the rotation speed of each photoconductor 7. A detection body 37 as a marking is formed on a member constituting a part of the drive gear 32. The detection body 37 rotates integrally with the drive gear 32. The detector 38 is a sensor that detects the detection body 37, and is, for example, a transmissive optical sensor having a laser diode and a phototransistor (not shown). The detector 37 changes the output signal (detection signal) when the detector 37 crosses the optical axis between the laser diode and the phototransistor.

  The detection body 37 is provided in a part of the drive gear 32. However, the detection body 37 is not limited to this. For example, the detection body 37 is the same rotation as the coupling 35, a rotating member coaxial with the coupling 35, or the coupling. You may provide in the rotation member which has a period.

  FIG. 4 is a block diagram schematically showing the electrical connection of each part provided in the color printer 1.

  As shown in FIG. 4, the color printer 1 has a controller 40 for controlling each unit. The controller 40 includes a central processing unit (CPU) 41 that centrally controls each unit, a read only memory (ROM) 42 that stores various programs executed by the CPU 41, a nonvolatile RAM that functions as a work area for the CPU 41, and the like. (Random Access Memory) 43 and the like are connected by a bus line 44.

  Further, the printer engine 3, the optical writing device 4, the fixing device 6 and the like are connected to the CPU 41 via a control circuit (not shown). Further, the CPU 41 receives operations from the motor control unit 45 that controls the drive of the drive motor 34 (34Y, 34C, 34M, 34K), the detector 38 (38Y, 38C, 38M, 38K), the timer 46, and the operator. An input device 47, which is an input unit, is connected. The input device 47 includes a numeric keypad, a touch screen, and the like, and accepts an operation from an operator.

  Here, since the photosensitive member 7 is rotationally driven by the driving motor 34 via the driving gear 32, the rotation of the coupling shaft 36 has a speed fluctuation due to the eccentricity of the driving gear 32 and the tooth profile accuracy. In other words, the speed of the photoconductor 7 is fluctuated.

  Therefore, in the present embodiment, in the assembly process of the color printer 1 or the like, the speed variation of the coupling shaft 36 when the driving device 31 is operated without attaching the photosensitive member 7 to the driving device 31 is measured with the speed measuring device ( (Not shown), the drive motor 31 is rotated based on rotational speed fluctuation information obtained from the speed fluctuation after the drive device 31 is mounted on the color printer 1. The rotation speed fluctuation information of the coupling shaft 36 obtained in advance is stored in the RAM 43 or the like that is a storage unit.

  The speed measuring device is a device that holds the driving device 31 and measures the speed fluctuation of the driving device 31. The drive device 31 is set at a predetermined position of the speed measuring device, and the drive motor 34 is rotationally driven in this state. At this time, the rotational speed of the coupling shaft 36 is measured by an encoder provided in the speed measuring device. As a result, the rotational speed of the coupling shaft 36 is obtained, and a deviation from the rotational speed with respect to a predetermined rotational speed (ideal speed) is obtained as a speed fluctuation of the coupling shaft 36. In this way, fluctuations in the speed of the coupling shaft 36 are obtained.

  FIG. 5 is an explanatory view showing the speed fluctuation of the coupling shaft 36, FIG. 6 is an explanatory view showing the speed fluctuation related to a factor that a constant speed fluctuation is always predicted from the drive component, and FIG. 7 is an antiphase amplitude of the speed fluctuation. It is explanatory drawing which shows these waveforms.

  As shown in FIG. 5, the waveform of the speed fluctuation of the coupling shaft 36 is a waveform that continuously indicates the amount of deviation from the ideal speed at a certain time. The waveform of the speed fluctuation of the coupling shaft 36 is a waveform generated by combining speed fluctuation due to various factors. Among these, as shown in FIG. 6, only the factors for which constant speed fluctuations are always predicted from the driving components, that is, the eccentricity of the driving gear 32, the eccentricity of the coupling 35, and the coupling 35 and the driving gear 32. The speed fluctuation related to factors such as the phase relationship is used as the speed fluctuation information. Based on the speed fluctuation information, the speed fluctuation of the opposite phase and the same amplitude as shown in FIG. 7 is used as a control profile (rotational speed fluctuation information) so that the speed fluctuation of the coupling shaft 36 is reduced. Is rotated (adjustment means).

  More specifically, the speed fluctuation state of the coupling shaft 36 can be grasped by associating the amount of deviation from the ideal speed with the position of the detection body 37. In the drive device 31, the position of the coupling shaft 36 is determined by a detector 38 that detects a detection body 37 provided in the drive gear 32. For example, the detection body 37 passes the detector 38 for a speed variation with a cycle of α seconds. Then, after β seconds, the speed fluctuation state is grasped such that the maximum amplitude (maximum speed error) is γ mm / s.

  That is, when a speed fluctuation waveform as shown in FIG. 5 is obtained, only the frequency component of interest (controllable frequency component) is extracted from the waveform with a high-pass filter or a low-pass filter, and FIG. Get the waveform as shown. FIG. 6 is a single frequency graph for easy understanding. When the waveform as shown in FIG. 6 is obtained, for example, the detection body 37 associates the maximum amplitude γ and the period α obtained from this graph with the position of the drive gear 32 obtained from the detection body 37. The driving device 31 is made aware that the maximum amplitude γ is generated after β seconds from the time crossing the detector 38. Thereby, since the detection body 37 and the detector 38 are mounted on the drive device 31, even after the drive device 31 is attached to the color printer 1, the speed fluctuation of the coupling shaft 36 is detected from the detection signal from the detector 38. It becomes possible to predict. Therefore, speed fluctuation can be reduced by motor control of opposite phase and same amplitude with respect to the drive motor 34. In particular, the speed fluctuation can be reduced regardless of the speed fluctuation characteristics (individual differences) of the photoconductor 7. In this way, it is possible to reduce the speed fluctuation of the photoconductor 7, so that a high-quality image can be obtained.

  The control profile of the drive motor 34 for reducing the speed fluctuation of the coupling shaft 36 is manually input by the operator through the input device 47 and stored in the RAM 43 or the like. Thereby, even when the drive device 31 is replaced by maintenance in the market or the like, the control profile (for example, parameter value) for each drive device 31 can be input to the color printer 1 at the installation site. This control profile (for example, parameter value) may be described by a barcode or the like. Further, although the drive motor 34 is rotated so as to suppress fluctuations in the speed of the coupling 35 (coupling shaft 36), the positional deviation on the paper caused by various error factors is shaken by the parameter value of the control profile. You can also tune it. Therefore, the control profile can be changed at the installation location of the color printer 1, and the speed fluctuation of the photoconductor 7 can be reduced in a short time to obtain a high-quality image. As the input device 47, for example, an external terminal connected to the touch panel or the color printer 1 may be used.

  In addition, the photosensitive member 7 may have a speed fluctuation depending on the dimensional accuracy of the coupling 35, an assembly error, and the like. Therefore, here, in addition to the measurement of the speed of the coupling shaft 36 by the speed measuring device, the photosensitive member 7 is connected to a driving member (not shown) that rotates at a constant speed, and the photosensitive member 7 is exposed by an encoder or the like for measuring the speed fluctuation. A case where the speed fluctuation of the body 7 is measured in advance will be described.

  The speed fluctuation information of the photoconductor 7 continuously indicates the deviation amount from the ideal speed at a certain time. The speed variation of the photoconductor 7 is grasped by associating the marking position and the shift amount provided on the photoconductor 7, the rotary member coaxial with the photoconductor 7 or the rotary member having the same rotation period as the photoconductor 7. can do. Similar to the speed fluctuation of the coupling shaft 36 based on the speed fluctuation information of the photosensitive member 7 (see FIG. 6), as shown in FIG. 8, the speed fluctuation related only to the factor for which a constant speed fluctuation is always predicted by the constituent elements. Is used as speed fluctuation information.

  Then, based on the speed fluctuation information, that is, the combined wave of the speed fluctuation of the coupling shaft 36 and the speed fluctuation of the photoconductor 7 as shown in FIG. In order to reduce the speed fluctuation of the photosensitive member 7 as well as the speed fluctuation of 36, the driving motor 34 is rotated using the speed fluctuation of the opposite phase and the same amplitude as shown in FIG. 10 as the control profile (rotational speed fluctuation information). Let As a result, the speed fluctuation of the photoconductor 7 can be reduced, and a high-quality image can be obtained.

  A control profile of the drive motor 34 for reducing the speed fluctuation of the photosensitive member 7 is also manually input by the operator through the input device 47 and stored in the RAM 43 or the like. Thereby, even when the photoconductor 7 is replaced by maintenance in the market or the like, the control profile (parameter value) for each photoconductor 7 can be input to the color printer 1 at the installation site. Note that this control profile (parameter value) may be described in a barcode or the like. Further, the positional deviation on the paper caused by various error factors despite the rotation of the drive motor 34 so as to suppress the speed fluctuation of the photosensitive member 7 can be tuned by changing the parameter value of the control profile. . Therefore, the control profile can be changed at the installation location of the color printer 1, and the speed fluctuation of the photoconductor 7 can be reduced in a short time to obtain a high-quality image. As the input device 47, for example, an external terminal connected to the touch panel or the color printer 1 may be used.

  In the present embodiment, the charging roller 8, the developing device 9, and the cleaning device 14 are individually provided, but the present invention is not limited to this. For example, as shown in FIG. 11, the charging roller 8, the developing device 9, and the cleaning device 14 are housed in the case 51 together with the corresponding single photoconductors 7 (7Y, 7C, 7M, and 7K), respectively. 52 may be unitized. Therefore, four process cartridges 52 are provided corresponding to the respective photoreceptors 7. The case 51 functions as a holding unit that holds the charging roller 8, the developing device 9, and the cleaning device 14 therein.

  The speed fluctuation of the photosensitive member 7 provided in the process cartridge 52 is measured in advance. Based on the rotational speed fluctuation information obtained from the speed fluctuation, the drive motor 34 is controlled so that the speed fluctuation of the coupling shaft 36 and the speed fluctuation of the photosensitive member 7 are reduced, whereby the speed caused by the image forming process. Variations can also be reduced.

  Further, the process cartridge 52 is provided with a memory 53 which is a nonvolatile storage unit. The memory 53 is attached in the case 51. At this time, the rotational speed fluctuation information of the photoconductor 7 may be stored in the memory 53. In this case, when the process cartridge 52 is attached to the color printer 1, the color printer 1 reads and recognizes the rotational speed fluctuation information of the photoconductor 7 from the memory 53, recognizes the speed fluctuation of the coupling shaft 36, and the photoconductor 7. By controlling the drive motor 34 so as to reduce the speed fluctuation, the speed fluctuation of the photoconductor 7 can be reduced and a high-quality image can be obtained. That is, since the rotational speed fluctuation information of the photoconductor 7 is recorded in the memory 53 attached to the process cartridge 52, the color printer 1 automatically recognizes the rotational speed fluctuation information of the photoconductor 7, and within a short time. High quality images can be obtained.

1 is a longitudinal side view schematically showing a color printer according to an embodiment of the present invention. FIG. 2 is a schematic side view showing a driving structure of a photoreceptor provided in a color printer. FIG. 2 is a schematic perspective view illustrating a driving structure of a photoconductor included in a color printer. It is a block diagram which shows roughly the electrical connection of each part with which a color printer is provided. It is explanatory drawing which shows the speed fluctuation | variation of a coupling shaft. It is explanatory drawing which shows the speed fluctuation regarding the factor by which a constant speed fluctuation is always estimated from a drive component. It is explanatory drawing which shows the waveform of the antiphase amplitude of the speed fluctuation | variation of FIG. It is explanatory drawing which shows the speed fluctuation regarding the factor by which constant speed fluctuation is always estimated from the component of a photoreceptor. It is explanatory drawing which shows the synthetic wave of the speed fluctuation of a coupling axis | shaft, and the speed fluctuation of a photoreceptor. It is explanatory drawing which shows the waveform of the antiphase amplitude of the speed fluctuation | variation of FIG. It is a vertical side view which shows a process cartridge roughly.

Explanation of symbols

1 Image forming device (color printer)
7 Image carrier (photoreceptor)
8 Charging part (charging roller)
9 Development section (developing device)
31 Drive device 34 Drive source (drive motor)
36 Transmission member (coupling shaft)
43 Memory (RAM)
47 Input unit (input device)
53 Memory (memory)
51 cases

Claims (11)

In an image forming apparatus that performs image formation by an electrophotographic process by rotationally driving an image carrier that carries an electrostatic latent image,
A driving source for generating a driving force for rotationally driving the image carrier;
A transmission member that rotationally transmits the driving force from the driving source to the image carrier;
Adjusting means for adjusting the rotational speed of the transmission member so as to cancel the rotational speed fluctuation of the transmission member based on the rotational speed fluctuation information of the transmission member obtained in advance;
An image forming apparatus comprising: A storage unit storing rotation speed variation information of the transmission member;
The image forming apparatus according to claim 1. An input unit for inputting rotational speed variation information of the transmission member;
A storage unit for storing rotational speed variation information of the transmission member input by the input unit;
The image forming apparatus according to claim 1, further comprising: The adjusting means is configured to determine the rotation speed fluctuation of the transmission member and the rotation of the image carrier based on the rotation speed fluctuation information of the image carrier obtained in advance in addition to the rotation speed fluctuation information of the transmission member obtained in advance. Adjusting the rotational speed of the transmission member and the rotational speed of the image carrier so as to cancel the speed fluctuation;
The image forming apparatus according to claim 1. A storage unit storing rotational speed variation information of the transmission member and rotational speed variation information of the image carrier;
The image forming apparatus according to claim 4. An input unit for inputting rotation speed fluctuation information of the transmission member and rotation speed fluctuation information of the image carrier;
A storage unit that stores rotational speed variation information of the transmission member and rotational speed variation information of the image carrier input by the input unit;
The image forming apparatus according to claim 4, further comprising: A plurality of the image carriers are provided,
The drive source and the transmission member are also provided in the same number as the image carrier,
The plurality of transmission members respectively transmit the driving force from the plurality of driving sources to the plurality of image carriers.
The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus. A charging unit for charging the image carrier;
A developing unit that supplies toner onto the image carrier carrying an electrostatic latent image;
A case for holding the image carrier, the charging unit, and the developing unit;
The image forming apparatus according to claim 1, further comprising: A storage unit storing rotational speed variation information of the image carrier;
A charging unit for charging the image carrier;
A developing unit that supplies toner onto the image carrier carrying an electrostatic latent image;
A case for holding the image carrier, the storage unit, the charging unit, and the developing unit;
The image forming apparatus according to claim 4, further comprising: In a drive device that rotationally drives an image carrier used for image formation by an electrophotographic process,
A driving source for generating a driving force for rotationally driving the image carrier;
A transmission member that rotationally transmits the driving force from the driving source to the image carrier;
Adjusting means for adjusting the rotational speed of the transmission member so as to cancel the rotational speed fluctuation of the transmission member based on the rotational speed fluctuation information of the transmission member obtained in advance;
A drive device comprising: The adjusting means is configured to determine the rotation speed fluctuation of the transmission member and the rotation of the image carrier based on the rotation speed fluctuation information of the image carrier obtained in advance in addition to the rotation speed fluctuation information of the transmission member obtained in advance. Adjusting the rotational speed of the transmission member and the rotational speed of the image carrier so as to cancel the speed fluctuation;
The drive device according to claim 10.

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