JP2008070605A - Image forming apparatus and color image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus in which driving torque information required for driving is previously stored in the storage means of a photoreceptive drum integrated type cartridge and is read therefrom and the driving of a drive source is controlled according to the driving torque information. <P>SOLUTION: The photoreceptive drum integrated type cartridge 100 has: a plurality of rotating bodies including a photoreceptor drum 101; a main body driving gear train 930 for transmitting driving force to the plurality of rotating bodies; and a tag memory 140 for storing driving torque T required for driving the plurality of rotating bodies. A main body apparatus 900 has: a driving motor 920 for driving the photoreceptive drum integrated type cartridge 100; and a tag memory reading device 940 for reading the driving torque T from the tag memory 140. In addition, the main body apparatus 900 has a drive control means 970 for controlling the driving of the driving motor 920, according to the driving torque T read from the tag memory 140. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image forming apparatus and a color image forming apparatus, and more particularly to an image forming apparatus that mounts a photosensitive drum integrated cartridge such as a copying machine, a printer, and a facsimile and forms and records an image on a sheet material. The photosensitive drum-integrated cartridge includes a plurality of rotationally driven rotating bodies including a photosensitive drum, drive transmission means for transmitting a driving force to the plurality of rotating bodies, and a driving torque necessary for driving the plurality of rotating bodies. Storage means for storing information. In the image forming apparatus main body (hereinafter referred to as main body apparatus), a drive source for supplying drive to the drive transmission means of the photosensitive drum integrated cartridge and the drive torque information stored in advance in the storage means are stored in the storage means. And reading means for reading from. Furthermore, the main body device has drive control means for controlling the drive of the drive source in accordance with the drive torque information read from the storage means.

  2. Description of the Related Art Some image forming apparatuses equipped with a photosensitive drum integrated cartridge such as a copying machine, a printer, and a facsimile are provided with the following photosensitive drum integrated cartridge drive control means.

For example, an image forming apparatus in which a photosensitive drum integrated cartridge is mounted has a configuration having means for reading and writing the number of prints used in the photosensitive drum integrated cartridge with respect to the storage means provided in the photosensitive drum integrated cartridge. is there. Then, there is a device provided with drive control means for increasing or decreasing the drive torque of a motor provided in the main body device in correspondence with the number of printed sheets read from the storage means (see, for example, Patent Document 1).
JP-A-9-218615 (5th page, FIG. 1)

  However, since the conventional example does not consider the difference in driving torque required for driving each photosensitive drum integrated cartridge, there are the following problems.

  When the photosensitive drum integrated cartridges are replaced, there is a problem that optimum driving control cannot be performed due to a difference in driving torque necessary for driving each photosensitive drum integrated cartridge. Due to this problem, for example, when the drive source is a pulse motor, there is a problem that the current value becomes larger than a necessary value, and vibration and operation noise increase.

  Further, in a color image forming apparatus in which at least two photosensitive drum integrated cartridges are mounted, optimal driving control cannot be performed because the driving torques required for driving the photosensitive drum integrated cartridges are different. There was a problem. Due to this problem, there has been a problem that uneven rotation occurs in the photosensitive drums and the like in each of the photosensitive drum integrated cartridges, and color misregistration occurs in the color image formed on the sheet material.

  The object of the first invention according to the present application is to store drive torque information in advance in the storage means of each photosensitive drum integrated cartridge, read the drive torque information from the storage means, and according to the drive torque information. This is to control the driving of the driving source.

  A second object of the present invention is to control driving of a driving source in accordance with each driving torque in a color image forming apparatus in which at least two photosensitive drum integrated cartridges are mounted. To do. In this case as well, drive torque information is stored in advance in the storage means of each photosensitive drum integrated cartridge.

  In order to achieve the above object, an image forming apparatus according to the present application comprises the following arrangement.

  (1) A plurality of rotating bodies that are rotationally driven including a photosensitive drum, a drive transmission means that transmits a driving force to the plurality of rotating bodies, and a memory that stores driving torque information necessary for driving the plurality of rotating bodies. An image forming apparatus in which a cartridge integrated with a photosensitive drum is replaceably mounted, a drive source for supplying drive to the drive transmission means, and the drive torque information stored in advance in the storage means An image forming apparatus comprising: a reading unit for reading from the storage unit; and a drive control unit that controls driving of the drive source in accordance with the drive torque information.

  (2) A plurality of rotating bodies that are rotationally driven including the photosensitive drum, a drive transmission unit that transmits a driving force to the plurality of rotating bodies, and a memory that stores driving torque information necessary for driving the plurality of rotating bodies. A color image forming apparatus for mounting at least two photosensitive drum integrated cartridges, each driving source supplying driving to the drive transmission means for each photosensitive drum integrated cartridge. Each reading means for reading the driving torque information stored in advance in the storage means from the storage means, and each driving control means for controlling the driving of the driving source in accordance with the driving torque information And a color image forming apparatus.

  According to the present invention, in the image forming apparatus in which the photosensitive drum integrated cartridge is replaceably mounted, the drive torque information is stored in advance in the storage means of the photosensitive drum integrated cartridge, and the drive source is determined according to the drive torque information. Can be optimally controlled.

  Further, in a color image forming apparatus in which at least two photosensitive drum integrated cartridges are mounted, the driving of each driving source can be optimally controlled in accordance with each driving torque. Also in this case, drive torque information is stored in advance in the storage means of each photosensitive drum integrated cartridge.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. However, the components described in this embodiment are merely examples, and the scope of the present invention is not intended to be limited only to them unless otherwise specified.

  A first embodiment of the present invention will be described with reference to FIGS. 1, 2, 3, 4 and 5. FIG. FIG. 1A is a schematic sectional view of an image forming apparatus according to a first embodiment of the present invention, and FIG. 1B is a schematic diagram showing a drive control method. FIG. 2 is a cross-sectional view of the overall configuration of an electrophotographic monochrome printer which is an example of an image forming apparatus according to Embodiment 1 of the present invention. FIG. 3 is a cross-sectional view showing a method of replacing the photosensitive drum integrated cartridge. FIG. 4 is a cross-sectional view showing a drive train of an image forming apparatus main body (hereinafter referred to as main body apparatus). FIG. 5 is a cross-sectional view showing the drive train of the photosensitive drum integrated cartridge.

{Overall configuration of image forming apparatus}
As shown in FIG. 2, a replaceable photosensitive drum integrated cartridge 100 is mounted in the main body 900 of the image forming apparatus. In addition, a laser scanner 200 that irradiates a laser beam based on image information to form an electrostatic latent image on the surface of the photosensitive drum 101 is provided in the vicinity of the photosensitive drum integrated cartridge 100.

  A photosensitive drum 101 is provided in the photosensitive drum integrated cartridge 100. Around the photosensitive drum 101, a charging roller 102, a developing roller 103, and a transfer roller 104 are arranged in order according to the rotation direction to constitute an image forming unit 10A. The charging roller 102 is a charging unit that uniformly charges the surface of the photosensitive drum 101, and the developing roller 103 visualizes a toner image by attaching toner to the electrostatic latent image formed by the laser scanner 200. Developing means. The transfer roller 104 is a transfer unit that transfers the toner image on the surface of the photosensitive drum 101 to the sheet material P, and the cleaning unit 105 is a unit that removes toner remaining on the surface of the photosensitive drum 101 after transfer. It is.

  Here, the photosensitive drum 101, the charging roller 102, the developing roller 103, the cleaning unit 105, the toner storage unit 106, and the toner agitation unit 107 are integrally formed into a cartridge, and the photosensitive drum integrated type cartridge 100. Is forming.

  At the bottom of the main unit 900, a sheet material storage cassette 301 for stacking and storing the sheet material P, and a cassette paper supply roller 310 for separating and feeding the sheet material P stacked and stored in the sheet material storage cassette 301 one by one. There is a cassette paper feeder 300 consisting of Further, on the front surface of the main body 900, a multi-tray paper feed cover 401 on which the sheet material P can be stacked, and a multi-tray paper feed that separates and feeds the sheet material P stacked on the multi-tray paper feed cover 401 one by one. There is a multi-tray paper feeding device 400 including a paper roller 410. The sheet material P is selectively fed from the cassette sheet feeding device 300 and the multi-tray sheet feeding device 400 and conveyed to the registration roller pair 501. The sheet material P is corrected for skew in the registration roller pair 501, and the sheet material P is fed so that the leading edge of the sheet material P coincides with the leading edge of the toner image formed on the surface of the photosensitive drum 101. Then, it is conveyed to the image forming unit 10A. The sheet material P conveyed to the image forming unit 10A is transferred onto the sheet material P by the transfer roller 104 serving as a transfer unit in the image forming unit 10A. A fixing device 600 is arranged in the sheet material conveyance downstream portion of the image forming unit 10 </ b> A, and the toner transferred to the sheet material P is fixed to the sheet material P by the fixing roller pair 601 of the fixing device 600. Thereafter, the fixed sheet material P is conveyed to a pair of discharge rollers 701 disposed in the sheet material conveyance downstream portion of the fixing device 600, and is discharged onto a discharge tray 702 provided on the upper portion of the main body device 900. The

{Replacing the photosensitive drum integrated cartridge}
As shown in FIG. 3, a cartridge cover 801 that can be opened and closed with respect to the main body device 900 for replacing the photosensitive drum integrated cartridge 100 is provided on the front surface of the main body device 900. The photosensitive drum integrated cartridge 100 can be replaced by opening and closing the cartridge cover 801.

{Driving of photosensitive drum integrated cartridge}
As shown in FIG. 4, the main body device 900 includes a drive motor 920 that is a drive source of the photosensitive drum integrated cartridge 100 and a main body drive gear train 930 that is drive transmission means in the main body device 900. . Furthermore, a drive output means 910 for giving drive to the photosensitive drum integrated cartridge 100 is provided. As shown in FIG. 5, the photosensitive drum integrated cartridge 100 includes a drive input unit 110 that receives driving from the drive output unit 910, and a cartridge driving gear train 130 that is a drive transmission unit in the photosensitive drum integrated cartridge 100. And are provided.

  When the photosensitive drum integrated cartridge 100 is attached to the main body apparatus 900, the drive output means 910 provided in the main body apparatus 900 and the drive input means 110 provided in the photosensitive drum integrated cartridge 100 are fitted. It has become. At this time, the drive from the drive motor 920 is transmitted to the photosensitive drum 101, the charging roller 102, the developing roller 103, the toner stirring means 107, and the like in the photosensitive drum integrated cartridge 100. This transmission is performed through the main body drive gear train 930, the drive output means 910, the drive input means 110, and the cartridge drive gear train 130. Here, the driving torque T required for driving the photosensitive drum integrated cartridge 100 depends on the variation of each part of the photosensitive drum 101, the charging roller 102, the developing roller 103, the toner stirring means 106, and the like. Depends on the integrated cartridge. For this reason, when the photosensitive drum integrated cartridge 100 is replaced, the driving torque T required to drive the photosensitive drum integrated cartridge 100 changes. In FIG. 5, the driving gear for the photosensitive drum 101 is 101G, the driving gear for the charging roller 102 is 102G, the driving gear for the developing roller 103 is 103G, and the driving gear for the toner stirring means 107 is 107G.

{Storage means for storing drive torque}
As shown in FIG. 1, the photosensitive drum integrated cartridge 100 includes a tag memory 140 formed of a nonvolatile memory as a storage unit that stores the value of the driving torque T of each photosensitive drum integrated cartridge. In addition, the main body device 900 is provided with a tag memory reading device 940 for reading the value of the driving torque T recorded in the tag memory 140.

  The value of the driving torque T is recorded in advance in the tag memory 140 of each photosensitive drum integrated cartridge by measuring at the time of production of the photosensitive drum integrated cartridge 100. With such a configuration, the main device 900 can read the value of the driving torque T of the mounted photosensitive drum integrated cartridge from the tag memory 140 at any time.

  Note that the value of the driving torque T stored in the tag memory is the measured value itself or information indicating the measured driving torque.

{Drive control of photosensitive drum integrated cartridge}
Here, when the drive motor 920 of the main body apparatus 900 shown in FIG. 1 is a pulse motor, the drive motor 920 needs to be driven by setting an optimum current value according to a required drive torque. However, when the photosensitive drum integrated cartridge 100 is driven, the photosensitive drum integrated cartridge 100 can be replaced. Therefore, the driving torques T are different from each other, and it has not always been possible to drive at an optimal current value. Conventionally, in order to prevent drive failure such as step-out, the current value is set in accordance with the maximum required drive torque of the photosensitive drum integrated cartridge. For this reason, there has been a problem that vibration and operation noise increase when the current value exceeds a required value.

  Therefore, in the first embodiment of the present invention, when printing is started (FIG. 1 (b) 1001), the following control is performed. The tag memory reading device 940 of the main body device 900 reads the value of the driving torque T of the mounted photosensitive drum integrated cartridge 100 from the tag memory 140 as needed (1002, 1003). Then, using the value of the drive torque T, the drive control means 970 of the main body device 900 uses the drive torque / current value comparison table 1005 determined in advance to determine the optimum current for driving the pulse motor. The value I can be set (1004). Thus, even when the photosensitive drum integrated cartridge is replaced, optimum driving control can be performed by obtaining the driving torque T in each photosensitive drum integrated cartridge (1006). And when a drive source is a pulse motor, it can prevent that an electric current value becomes an appropriate value and a vibration and an operation | movement sound become loud.

  A second embodiment of the present invention will be described with reference to FIGS. 6, 7, 8, 9, and 10. FIG. FIG. 6A is a schematic sectional view of an image forming apparatus according to the second embodiment of the present invention, and FIG. 6B is a schematic diagram showing a drive control method. FIG. 7 is a sectional view of the overall configuration of an electrophotographic color printer which is an example of an image forming apparatus according to Embodiment 2 of the present invention. FIG. 8 is a cross-sectional view showing a method for replacing the photosensitive drum integrated cartridge. FIG. 9 is a cross-sectional view showing a drive train of the main unit. FIG. 10 is a cross-sectional view showing the drive train of the photosensitive drum integrated cartridge.

{Overall configuration of image forming apparatus}
As shown in FIG. 7, in the main body 900 of the image forming apparatus, replaceable photosensitive drum integrated cartridges 100a, 100b, 100c, and 100d (hereinafter referred to as 100a to 100d and the like) are attached to the respective colors. Yes. Further, laser scanners 200a to 200a, which form an electrostatic latent image on the surface of the photosensitive drums 101a to 101d by irradiating a laser beam in the vicinity of the photosensitive drum integrated cartridges 100a to 100d based on image information of each color. 200d is provided.

  Photosensitive drums 101a to 101d are provided in the photosensitive drum integrated cartridges 100a to 100d, respectively. Around the photosensitive drums 101a to 101d, charging rollers 102a to 102d, developing rollers 103a to 103d, transfer rollers 104a to 104d, and cleaning units 105a to 105d are arranged in order according to the rotation direction. Is done. The image forming units 10Aa to 10Ad are configured.

  The charging rollers 102a, 102b, 102c, and 102d are charging units that uniformly charge the surfaces of the photosensitive drums 101a, 101b, 101c, and 101d. The developing rollers 103a, 103b, 103c, and 103d are developing units that develop toner images by attaching toner to the electrostatic latent images formed by the laser scanners 200a, 200b, 200c, and 200d. The transfer rollers 104a, 104b, 104c, and 104d are transfer units that transfer the toner images on the surfaces of the photosensitive drums 101a, 101b, 101c, and 101d to the sheet material P. The cleaning units 105a, 105b, 105c, and 105d are for removing, that is, cleaning, toner remaining on the surfaces of the photosensitive drums 101a, 101b, 101c, and 101d after transfer.

  Here, the photosensitive drums 101 a to 101 d (hereinafter abbreviated), the charging roller 102, the developing roller 103, the cleaning unit 105, the toner storage unit 106, and the toner stirring unit 107 are respectively integrated. Is made into a cartridge. In this way, the photosensitive drum integrated cartridges 100a, 100b, 100c, and 100d are formed.

  At the bottom of the main unit 900, a sheet material storage cassette 301 for stacking and storing the sheet material P, and a cassette paper supply roller 310 for separating and feeding the sheet material P stacked and stored in the sheet material storage cassette 301 one by one. There is a cassette paper feeder 300 consisting of Further, on the front surface of the main body 900, a multi-tray paper feed cover 401 on which the sheet material P can be stacked, and a multi-tray paper feed that separates and feeds the sheet material P stacked on the multi-tray paper feed cover 401 one by one. There is a multi-tray paper feeding device 400 including a paper roller 410. The sheet material P is selectively fed from the cassette sheet feeding device 300 and the multi-tray sheet feeding device 400 and conveyed to the registration roller pair 501. The sheet material P is skew-corrected by the registration roller pair 501, and further, the leading edge of the sheet material P coincides with the leading edge of the toner image formed on the surface of the photosensitive drum 101 a located on the upstream side of the sheet material conveyance. The paper feed timing is taken and conveyed to the image forming unit 10Aa. The sheet material P conveyed to the image forming unit 10Aa is transferred to the sheet material P by the transfer roller 104a, which is a transfer means, in the image forming unit 10Aa. In the order of the sheet material conveyance direction, each color toner image is transferred to the sheet material P in the image forming units 10Ab, 10Ac, and 10Ad, and a color image is formed. A fixing device 600 is disposed in the sheet material conveyance downstream portion of the image forming unit 10Ad, and the toner transferred to the sheet material P is fixed to the sheet material P by the fixing roller pair 601 of the fixing device 600. Thereafter, the fixed sheet material P is conveyed to a pair of discharge rollers 701 disposed in the sheet material conveyance downstream portion of the fixing device 600, and is discharged onto a discharge tray 702 provided on the upper portion of the main body device 900. The

{Replacing the photosensitive drum integrated cartridge}
As shown in FIG. 8, on the front surface of the main body apparatus 900, a cartridge cover 801 provided to be openable and closable with respect to the main body apparatus 900 for exchanging the photosensitive drum integrated cartridges 100a, 100b, 100c, and 100d. Is provided. By opening and closing the cartridge cover 801, the photosensitive drum integrated cartridges 100a, 100b, 100c, and 100d are replaced.

{Driving of photosensitive drum integrated cartridge}
As shown in FIG. 9, the main unit 900 includes the following means. First, there are drive motors 920a, 920b, 920c, and 920d that serve as drive sources for the photosensitive drum integrated cartridges 100a, 100b, 100c, and 100d, respectively. The main body drive gear trains 930a, 930b, 930c, and 930d are the respective drive transmission means in the main body device 900. Respective drive output means 910a, 910b, 910c, and 910d for outputting drive to the photosensitive drum integrated cartridges 100a, 100b, 100c, and 100d. As shown in FIG. 10, the photosensitive drum integrated cartridges 100a, 100b, 100c, and 100d are provided with the following means. First, drive input means 110a, 110b, 110c, and 110d that receive drive from the drive output means 910a, 910b, 910c, and 910d. The cartridge driving gear trains 130a, 130b, 130c, and 130d are driving transmission means in the photosensitive drum integrated cartridges 100a, 100b, 100c, and 100d. In FIG. 10, the symbols a to d are omitted. Reference numeral 101G denotes a driving gear for the photosensitive drum 101 (a to d omitted, the same applies hereinafter), 102G denotes a driving gear for the charging roller 102, 103G denotes a driving gear for the developing roller 103, and 107G denotes a driving gear for the toner stirring unit 107. .

  When the photosensitive drum integrated cartridges 100a to 100d are mounted on the main body device 900, the operation is as follows. That is, the drive output means 910a to 910d provided in the main body apparatus 900 and the drive input means 110a to 110d provided in the photosensitive drum integrated cartridges 100a to 100d, respectively, are fitted. At this time, driving from drive motors 920a to 920d (hereinafter abbreviated as a to d) is applied to the photosensitive drum 101, the charging roller 102, the developing roller 103, the toner stirring means 107, and the like in the photosensitive drum integrated cartridge 100. Will be communicated. This drive is transmitted through the main body drive gear train 930, the drive output means 910, the drive input means 110, and the cartridge drive gear train 130, respectively. Here, the driving torque T required for driving the photosensitive drum integrated cartridge 100 differs depending on variations of components such as the photosensitive drum 101, the charging roller 102, the developing roller 103, and the toner stirring means 107. Further, each time the photosensitive drum integrated cartridges 100a, 100b, 100c, and 100d are replaced, the driving torques Ta, Tb, Tc, and Td necessary for driving the photosensitive drum integrated cartridges 100a, 100b, 100c, and 100d change. become.

{Storage means for storing drive torque}
As shown in FIG. 6A, the photosensitive drum-integrated cartridges 100a to 100d (hereinafter abbreviated as a to d) store storage means for storing the driving torque T of each color photosensitive drum-integrated cartridge. As shown, a tag memory 140 composed of a nonvolatile memory is provided. The main unit 900 includes tag memory reading devices 940a, 940b, 940c, and 940d for reading the values of the driving torques Ta, Tb, Tc, and Td recorded in the tag memories 140a, 140b, 140c, and 140d. It has been.

  The values of the driving torques Ta to Td are recorded in advance in the tag memories 140a to 140d of the respective photosensitive drum integrated cartridges by being measured at the time of production of the photosensitive drum integrated cartridges 100a to 100d. With such a configuration, the main apparatus 900 can read the values of the drive torques Ta, Tb, Tc, and Td of the mounted photosensitive drum integrated cartridge from the tag memories 140a, 140b, 140c, and 140d as needed. .

{Drive control of photosensitive drum integrated cartridge}
Here, when the drive motors 920a to 920d of the main body apparatus 900 shown in FIG. 6A are servo motors that perform feedback control, the drive motors 920a to 920d set optimal servo constants according to the required drive torque. Feedback control is required. However, when driving the photosensitive drum integrated cartridges 100a to 100d, the photosensitive drum integrated cartridges 100a to 100d are separate from each other and can be replaced. For this reason, drive torques Ta, Tb, Tc, and Td are different from each other, and optimum feedback control cannot be performed. Conventionally, feedback control is performed by setting a servo constant in accordance with the average driving torque of the photosensitive drum integrated cartridge. For this reason, when the servo constants do not match, there is a problem that uneven rotation of the photosensitive drum due to uneven rotation of the motor occurs and color misregistration occurs. Therefore, in the second embodiment of the present invention, when printing is started (FIG. 6B 2001), the following control is performed. First, the main device 900 reads the values of the drive torques Ta to Td of the mounted photosensitive drum integrated cartridge from the tag memories 140a to 140d (hereinafter abbreviated as “a” to “d”) as needed (2002, 2003). . And it controls as follows using the value of this drive torque T. That is, each drive control means 970 of the main unit 900 sets an optimum servo constant F for feedback control of the servomotor based on a predetermined drive torque / servo constant comparison table 2005. (2004). As a result, optimum drive control can be performed by obtaining the drive torques Ta, Tb, Tc, and Td of the photosensitive drum integrated cartridge for each color (2006). When the drive source is a servo motor, the rotation control of each motor is eliminated by feedback control with an appropriate servo constant F, and color misregistration due to the rotation unevenness of the photosensitive drum can be prevented.

(A) is a schematic sectional view of the image forming apparatus according to the first embodiment of the present invention, and (b) is a schematic diagram showing a drive control method. 1 is an overall cross-sectional view of an electrophotographic monochrome printer apparatus according to a first embodiment of the present invention. FIG. 3 is a cross-sectional view showing replacement of the photosensitive drum integrated cartridge according to the first embodiment of the present invention. It is sectional drawing which shows the drive train in the main body apparatus concerning 1st Example of this invention. FIG. 3 is a cross-sectional view showing a drive train in the photosensitive drum integrated cartridge according to the first embodiment of the present invention. (A) is a schematic sectional view of an image forming apparatus according to a second embodiment of the present invention, and (b) is a schematic diagram showing a drive control method. It is sectional drawing which shows the whole structure of the electrophotographic color printer apparatus concerning the 2nd Example of this invention. It is sectional drawing which shows replacement | exchange of the photosensitive drum integrated cartridge concerning the 2nd Example of this invention. It is sectional drawing which shows the drive row | line | column in the main body apparatus concerning the 2nd Example of this invention. It is sectional drawing which shows the drive row | line in the photosensitive drum integrated cartridge concerning the 2nd Example of this invention.

Explanation of symbols

10A image forming unit 100 photosensitive drum integrated cartridge 101 photosensitive drum 101G photosensitive drum gear 102 charging roller 102G charging roller gear 103 developing roller 103G developing roller gear 104 transfer roller 104G transfer roller gear 105 cleaning unit 106 toner storage unit 107 toner agitation unit 110 driving input Means 130 Cartridge drive gear train 140 Tag memory 200 Laser scanner 300 Cassette paper feeder 301 Sheet material storage cassette 310 Cassette paper feed roller 400 Multitray paper feeder 401 Multitray paper feed cover 410 Multitray paper feed roller 501 Registration roller pair 600 Fixing device 601 Fixing roller pair 701 Paper discharge roller pair 702 Paper discharge tray 801 Cartridge cover 900 Main body device 910 Drive output means 920 Drive motor 930 Main unit drive gear train 940 Tag memory reading device P Sheet material

Claims (6)

A plurality of rotationally driven rotating bodies including a photosensitive drum; drive transmission means for transmitting a driving force to the plurality of rotating bodies; and storage means for storing driving torque information necessary for driving the plurality of rotating bodies. An image forming apparatus for detachably mounting a photosensitive drum integrated cartridge having:
A drive source for supplying drive to the drive transmission means;
Reading means for reading the driving torque information stored in advance in the storage means from the storage means;
An image forming apparatus comprising: drive control means for controlling driving of the drive source in accordance with the drive torque information.   The image forming apparatus according to claim 1, wherein the drive source is a pulse motor, and the drive control unit controls a current value of the pulse motor.   The image forming apparatus according to claim 1, wherein the drive source is a servo motor that performs feedback control, and the drive control unit controls a servo constant of the servo motor. A plurality of rotationally driven rotating bodies including a photosensitive drum; drive transmission means for transmitting a driving force to the plurality of rotating bodies; and storage means for storing driving torque information necessary for driving the plurality of rotating bodies. A color image forming apparatus in which at least two photosensitive drum integrated cartridges are mounted,
Each drive source for supplying drive to the drive transmission means for each photosensitive drum integrated cartridge;
Each reading means for reading the driving torque information stored in advance in the storage means from the storage means;
A color image forming apparatus comprising: drive control means for controlling the drive of the drive source in accordance with the drive torque information.   5. The color image forming apparatus according to claim 4, wherein each of the drive sources is a pulse motor, and each of the drive control units controls a current value of the pulse motor.   5. The color image forming apparatus according to claim 4, wherein each of the drive sources is a servo motor that performs feedback control, and each of the drive control units drives and controls a servo constant of the servo motor.

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