JP2009258518A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of preventing a normal printed matter from being output without charging while preventing the occurrence of a jam in the event of a failure of communication with a charging device. <P>SOLUTION: The copy machine for providing paid duplication service performs, when a communication failure with the charging device occurs after starting paper feed (step S102), non-regular duplication printing or output processing such that an abnormality image is printed according to a carrying position of recording paper and the timing of an image forming process (step S108), printing is performed in a non-regular process with off of transfer bias or the like (step S110), a guide position of recording paper to a fixing roller is changed to cause wrinkling (step S112), or abnormal processing is applied in discharge of recording paper (step S113). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image forming apparatus that forms an image by charging an externally connected charging apparatus.

  In a commercial image forming apparatus that provides a fee-based copying service, measures are taken so as not to cause a problem related to billing for a service usage fee. For example, in Patent Document 1, when a plurality of recording sheets are simultaneously conveyed in parallel and a fee is insufficient during double-sided printing, the processing is stopped with recording sheets remaining in the apparatus. A technique for preventing this is disclosed. Japanese Patent Application Laid-Open No. 2004-228561 discloses a technique that can appropriately charge for a printed material that is illegally extracted from an intermediate tray during a single-sided multiple copy or double-sided copy printing process.

  On the other hand, in a configuration in which charging is performed by a charging device externally connected to the image forming apparatus, a communication error such as a signal from the charging device being interrupted during the printing process (for example, after the paper feeding until the charging timing immediately before the paper discharge) ( When a signal abnormality occurs, there is a case where the recording paper during the printing process is output without being charged. In this way, if a normal printed matter is output without charge, the charge service provider suffers a disadvantage. Therefore, when an abnormality in communication with the charging device is detected, the recording paper being printed is forcibly jammed in the image forming device, so that normal output is not charged. In some cases, it incorporates technology to prevent output.

JP 2003-173115 A JP-A-9-190123

  However, in the technology for generating a jam in the image forming apparatus as described above, it is necessary to remove the jammed recording paper from the apparatus, which is troublesome. There is also a problem that the apparatus cannot be operated until the jammed recording paper is removed and the apparatus is restored. In addition, the techniques of Patent Documents 1 and 2 cannot solve the problem of charging due to an abnormality in communication with the charging apparatus.

  The present invention is intended to solve the above-described problem, and prevents a normal printed matter from being output without charge without causing a jam when an abnormality occurs in communication with the charging apparatus. An object of the present invention is to provide an image forming apparatus capable of performing the above.

  The gist of the present invention for achieving the object lies in the inventions of the following items.

[1] An image reading unit that reads a document image and acquires image data;
An image forming unit that feeds and conveys recording paper and performs an image forming output process for forming and outputting an image based on the image data acquired by the image reading unit on the recording paper;
A communication unit that communicates with the billing device;
When communication with the charging apparatus by the communication unit is normally performed, the image forming unit normally performs the image forming output process, and a charging signal for the output recording paper is transmitted to the communication unit. When the communication unit communicates with the charging device after the start of paper feeding by the image forming unit, the image formation is performed on the fed recording paper. A control unit that causes the image forming output process to be performed abnormally and output the image,
An image forming apparatus comprising:

  In the above invention, the image forming apparatus transmits a charging signal for the recording paper formed and output to the externally connected charging apparatus, whereby the charging for the image formation is performed by the charging apparatus. When the communication with the charging apparatus is normally performed, the image forming unit of the image forming apparatus feeds and transports the recording paper, and converts the image data acquired by reading the original image by the image reading unit. An image forming output process for forming and outputting a base image on a recording sheet is normally performed. By this processing, a normal printed matter, that is, a printed matter in a normal state in which a normal image is formed, is output to a normal discharge unit that can be taken out by a user (a billing service user / customer).

  If an abnormality occurs in communication with the charging apparatus after the start of paper feeding by the image forming unit, the image forming unit performs an abnormal image forming output process on the fed recording paper and outputs it. By this processing, an abnormal printed material is output to the discharge unit, or the printed material is output to an emergency discharge unit that cannot be taken out by the user.

  As described above, when a printed matter is output without being charged due to an abnormality in communication with the charging device, an abnormal printed matter is output without causing a jam or the printed matter can be taken out to the user. It is possible to prevent a normal printed matter from being output without charge because it is output to an emergency discharge unit.

[2] The image forming unit includes a detection unit that detects a position of the fed recording sheet,
The image forming apparatus according to [1], wherein the control unit changes the content of the abnormal image formation output processing according to the position of the recording paper detected by the detection unit.

  In the above invention, the content of the abnormal image formation output processing is changed according to the position of the fed recording paper, and the image forming unit performs the abnormal image formation output processing of the changed content. As a result, the abnormal image formation output process can be performed by changing the contents to be executable or appropriate depending on the position of the recording paper.

[3] The control unit changes the content of the image data when the abnormality occurs, and outputs an image based on the image data with the changed content to the image forming unit as the abnormal image formation output process. The image forming apparatus according to [1] or [2], wherein a process of forming the recording sheet is performed.

  In the above invention, the image forming unit performs a process of forming an image based on the image data whose contents are changed on the recording paper as an abnormal image formation output process. By this processing, a printed matter on which an abnormal image is formed is output.

  The content of the image data is changed by, for example, replacing normal image data (image data acquired by the image reading unit) with another image data, or combining another image data with the normal image data. be able to. The replacement and composition of the image data can be performed using the image data by storing the replacement or composition image data in a storage unit in the image forming apparatus in advance. In this case, an image forming apparatus manufacturer or a billing service provider creates image data such as an image to be shown to the user in advance and stores the image data in the image forming apparatus. It can also be used to show the user a desired image.

[4] The image forming unit includes:
A photoreceptor,
A charging unit for charging the photoreceptor;
A latent image forming unit that forms a latent image by irradiating the photosensitive member charged by the charging unit with light whose emission is controlled based on image data;
A developing unit that develops a latent image formed on the photosensitive member by the latent image forming unit to form a developed image;
A transfer unit that transfers the developed image formed on the photoreceptor by the developing unit to the recording paper;
With
The normal image formation output process includes:
A charging process in which the charging unit performs the charging under predetermined processing conditions;
A latent image forming process in which the latent image forming unit forms the latent image under predetermined processing conditions;
A developing process in which the developing unit forms the developed image under predetermined processing conditions;
A transfer process in which the transfer unit performs the transfer under predetermined processing conditions;
Including
The control unit changes the predetermined processing condition of at least one of the charging process, the latent image forming process, the developing process, and the transfer process when the abnormality occurs. The image forming unit causes the at least one process in which the predetermined processing condition is changed as the abnormal image formation output process to perform processing in the changed processing condition [1] to [1] 3]. The image forming apparatus according to any one of 3).

  In the above invention, the image forming unit normally performs charging processing, latent image forming processing, development processing, and transfer processing in an electrophotographic image forming process as normal image forming output processing. That is, a charging process in which the charging unit charges the photoconductor, a latent image forming process in which the latent image forming unit irradiates the charged photoconductor with light emission controlled based on image data, and forms a latent image, and development. The development process in which the latent image formed on the photosensitive member is developed to form a developed image, and the transfer process in which the transfer unit transfers the developed image formed on the photosensitive member to the recording paper are all predetermined processing conditions. Perform normally. As a result, a printed matter on which a normal image is formed by the electrophotographic image forming process is output.

  Further, as an abnormal image formation output process, a predetermined process condition of at least one of the above-described charging process, latent image formation process, development process, and transfer process is changed. Process with.

  When the processing conditions of the charging process are changed, the photoconductor is not normally charged, and a latent image (electrostatic latent image) cannot be normally formed on the photoconductor. For example, if the charging voltage to be applied is changed, the charging potential of the photoconductor becomes non-normal, and if the charging voltage is stopped, the photoconductor becomes uncharged.

  When the processing conditions of the latent image forming process are changed, a normal latent image is not formed on the photoconductor. For example, if the light emission control conditions, that is, the irradiation conditions (intensity) of light applied to the photoconductor are changed, the potential of the latent image formed on the photoconductor will not be a normal value, and the photoconductor will be irradiated with light. If stopped, no latent image is formed.

  When the processing conditions of the development process are changed, the latent image formed on the photoconductor is not normally developed, and a normal developed image (toner image) is not formed. For example, if the development voltage to be applied is changed, the developer is not properly supplied and normal image characteristics cannot be obtained, and if the development voltage is stopped or the supply of developer is stopped, a normal developed image is obtained. No longer formed.

  When the processing conditions of the transfer process are changed, the developed image is not normally transferred onto the recording paper. For example, if the transfer voltage to be applied is changed, the developer is not properly transferred and normal image characteristics cannot be obtained. If the transfer voltage is stopped, the developed image is not transferred.

  As a result, a printed matter on which an abnormal (abnormal) image is formed is output.

[5] The image forming unit includes:
A roller that presses and rotates against the recording paper and fixes the image while conveying the recording paper;
A guide unit capable of guiding the recording paper to the roller and changing the guide position;
With
The normal image formation output process includes a fixing process in which the roller fixes the recording sheet guided to a position where the guide unit is not wrinkled by the conveyance by the roller.
The control unit changes the guide position by the guide unit when the abnormality occurs, and the guide unit generates wrinkles due to conveyance by the roller as the abnormal image formation output process to the image forming unit. The image forming apparatus according to any one of [1] to [3], wherein the roller performs a fixing process in which the fixing is performed on the recording sheet guided to the position.

  In the above invention, as a fixing process in the electrophotographic image forming process, a roller (fixing roller) such as a heating / pressure roller is pressed against the recording paper and rotated to fix the image while conveying the recording paper. The guide unit guides the recording paper to the roller and changes the guide position. For example, the guide portion can change the guide position by displacement such as movement or tilting. As for the recording paper, the approach position, the approach angle (approach attitude), etc. with respect to the roller are changed by the displacement of the guide section.

  As a normal image forming output process, the image forming unit performs a fixing process in which the guide unit guides the recording paper to a position where wrinkles are not generated by the conveyance by the roller, and the roller fixes the image by the above operation on the recording paper. Do. By this processing, a flat printed material without wrinkles, that is, a printed material in a normal state is output. Further, as an abnormal image formation output process, the guide unit guides the recording paper to a position where wrinkles are generated by conveyance by a roller, and the roller performs fixing processing for fixing the image by the above operation on the recording paper. By this process, a non-planar printed material with wrinkles, that is, an abnormal (abnormal) printed material is output.

[6] The image forming unit includes:
A processing unit that switches between processing that adds abnormal processing to the recording paper and non-processing that does not add abnormal processing,
The normal image formation output processing includes the non-processing processing performed by the processing unit,
The control unit switches processing performed by the processing unit to the processing processing when the abnormality occurs, and causes the image forming unit to perform the processing processing as the abnormal image formation output processing. The image forming apparatus according to any one of [1] to [5].

  In the above-described invention, the image forming unit switches between the processing for applying abnormal processing to the recording paper and the non-processing for not applying abnormal processing by the processing unit. As the processing unit, for example, a cutting member or a drawing member provided so as to be able to come in contact with and separate from the conveyed recording paper can be applied. A cutting tool such as a cutter can be used as the cutting member, and an ink coating material (paint material) such as a stamp or a magic can be used as the drawing member. In the case of a cutting member, the transported recording paper comes into contact with the cutting member and is cut. In the case of a drawing member, the transported recording paper is brought into contact with the drawing member to draw markings, graffiti, and the like.

  As a normal image formation output process, the image forming unit performs a non-processing process in which an abnormal process is not applied to the recording paper by the processing unit. By this processing, a printed matter in a normal state that is not subjected to abnormal processing is output. Further, the image forming unit performs processing for adding abnormal processing to the recording paper by the processing unit as an abnormal image formation output processing. By this process, a printed matter in an abnormal (abnormal) state subjected to abnormal processing is output.

[7] The image forming unit includes:
A first discharge unit from which the output recording paper can be taken out by a user of the image forming apparatus;
A second discharge unit in which the output recording paper cannot be taken out by a user of the image forming apparatus;
A switching unit capable of switching the output destination of the recording paper to the first discharge unit or the second discharge unit;
With
The normal image forming output process includes a process in which the image forming unit outputs the recording paper to the first discharge unit by the switching unit,
The control unit switches the output destination by the switching unit when the abnormality occurs, and causes the switching unit to output the recording paper to the first discharge unit as the abnormal image formation output processing to the image forming unit. The image forming apparatus according to any one of [1] to [4], wherein the output processing is performed.

  In the above invention, the image forming unit switches the output destination of the recording sheet to the first discharge unit that can be taken out by the user or the second discharge unit that cannot be taken out by the user by the switching unit. For example, the switching unit distributes the recording paper to a path leading to the first discharge unit or the first discharge unit or a path leading to the second discharge unit or the second discharge unit by displacement such as movement or tilting (guide) Member) and the like can be applied.

  The image forming unit performs a process of outputting the recording sheet to the first discharge unit by the switching unit as a normal image formation output process. By this processing, the user can take out and obtain a normal printed matter from the first discharge unit. The image forming unit performs a process of outputting the recording paper to the second discharge unit by the switching unit as an abnormal image formation output process. By this processing, the user cannot take out the printed material from the second discharge unit and cannot acquire the printed material.

  According to the image forming apparatus of the present invention, when an abnormality occurs in communication with a charging apparatus, it is possible to prevent normal printed matter from being output without charging without causing a jam. Accordingly, it is possible to avoid the disadvantage of the charging service provider by the image forming apparatus. Further, it is not necessary to remove the jammed recording paper, and the apparatus can be quickly restored.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a configuration example of a copy charging system 5 according to an embodiment of the present invention. The copying billing system 5 is a system that provides a copying service for a fee, and is configured by connecting the copying machine 10 and the billing apparatus 100 so that they can communicate with each other via a cable 7.

  The copying machine 10 is an apparatus (image forming apparatus) called a digital color copying machine having a color copy function, a color printer function, and the like of an original. In the copy charging system 5, an operation by a user of a copy service is received. It performs the function of executing copy printing. The charging device 100 is a device such as a coin vendor that accepts input of coins or the like and collects a fee according to the use of the service. In the copying charging system 5, the copying service used in the copying machine 10 is charged. Perform functions.

  FIG. 2 shows a schematic configuration of the mechanism system of the copying machine 10. The copying machine 10 includes an automatic document feeder 20, a scanner unit 30 as an image reading unit, a printer unit 40 as an image forming unit, and an operation display unit 17. The base unit of the copying machine 10 is constituted by a printer unit 40, and a scanner unit 30 and an automatic document feeder 20 are disposed on the printer unit 40.

  The automatic document feeder 20 has a function of automatically feeding the document N to the reading position S by the scanner unit 30 below. The automatic document feeder 20 is configured to eject a document tray 21 on which documents N are stacked, a document feeding mechanism (not shown) that feeds documents N to a reading position S of the scanner unit 30, and a document N that has been read by the scanner unit 30. And a discharge tray 22.

  The automatic document feeder 20 feeds the documents N stacked on the document tray 21 one by one to the reading position S of the scanner unit 30 by the document feeding mechanism, and discharges the scanned documents N to the discharge tray 22. For a double-sided document, it is fed from the document tray 21 to the reading position S and scanned on the front side, and then the document feeding mechanism reverses the front and back and feeds it again to the reading position S. It is supposed to be.

  The scanner unit 30 has a function of reading the document N in color and acquiring image data. Specifically, the image of the original N is optically read, and the four basic colors of yellow (Yellow; Y), magenta (Magenta; M), cyan (Cyan; C), and black (blacK; K) are classified by color. It has a function to output image data.

  The scanner unit 30 is provided with a platen glass 31 on which the document N is placed on the upper surface, and a contact glass 32 is provided at the above-described reading position S located on the side of the platen glass 31. Inside, a document illumination unit 35 having a light source 33 having a back reflector and a mirror 34 that reflects the reflected light L from the document N by the illumination light, and the document illumination unit 35 along the lower surface of the platen glass 31. A moving mechanism (not shown) that reciprocates in the width direction of the copying machine 10 (the left-right direction in the figure), and a color type line that receives the reflected light L from the document N and outputs electrical signals according to the light intensity for each color. The image sensor 36, a plurality of reflection mirrors 37 that form an optical path for guiding the reflected light L reflected by the mirror 34 of the document illumination unit 35 to the line image sensor 36, and the reflected light L guided by the reflecting mirror 37 A condensing lens 38 that condenses light on the line image sensor 36 is provided.

  When reading the document N placed on the platen glass 31, the scanner unit 30 illuminates the document N while the document illumination unit 35 turns on the light source 33 and moves along the lower surface of the platen glass 31. The line image sensor 36 receives and reads the reflected light L of the document N scanned and illuminated by the moving document illumination unit 35 via the mirror 34, the reflection mirror 37, and the condenser lens 38. When reading the document N fed by the automatic document feeder 20, the document illuminating unit 35 moves to a position below the contact glass 32, stops, the light source 33 is turned on, and the document N moves over the reading position S. Illuminate. Similarly, the line image sensor 36 receives and reads the reflected light L of the moving document N via the mirror 34, the reflecting mirror 37, and the condenser lens 38.

  The printer unit 40 is a tandem color laser printer that forms an image corresponding to input image data on a recording sheet by an electrophotographic image forming process. The printer unit 40 performs color processing on an image of an original N read by the scanner unit 30. It has the function of copying, printing and outputting.

  The printer unit 40 includes a laser unit 41, four imaging units 50 (50Y, 50M, 50C, and 50K) corresponding to the colors Y, M, C, and K, and four toners. A replenishing device 42 (42Y, 42M, 42C, 42K), a toner recovery unit 43, a transfer separating device 60 as a transfer unit, a fixing device 70 as a fixing unit, and four paper feeding devices (one-stage paper feeding device) 80a, two-stage sheet feeder 80b, three-stage sheet feeder 80c, four-stage sheet feeder 80d), manual sheet feeder 80e, conveying apparatus 90, processing apparatus 44 as a processing section, and first discharge section. And a paper discharge box 46 as a second discharge unit. Moreover, the conveying apparatus 90 is provided with the inversion part 90a and the double-sided part 90b.

  The laser unit 41 performs the function of scanning and exposing the surface of the photosensitive drum 51 (51Y, 51M, 51C, 51K) provided in the imaging unit 50 with a laser beam to form an electrostatic latent image on the drum surface.

  The laser unit 41 includes four laser light sources (laser diodes; LD) (not shown) corresponding to the colors Y, M, C, and K. Each laser light source emits a laser beam whose emission is controlled (on / off control) in accordance with input image data. Although not shown in detail, the laser unit 41 further includes a polygon mirror that reflects and scans four laser beams LY, LM, LC, and LK emitted from each laser light source, and a motor that rotationally drives the polygon mirror. And optical members such as a scanning lens and a reflection mirror for guiding the four laser beams LY, LM, LC, and LK scanned by the polygon mirror to the corresponding photosensitive drums 51Y, 51M, 51C, and 51K.

  The laser unit 41 emits laser beams LY, LM, LC, and LK, each of which is controlled to emit light according to image data, and a polygon mirror that rotates each laser beam reflects and scans each of the scanned laser beams. A laser beam is irradiated onto the corresponding photosensitive drums 51Y, 51M, 51C, and 51K of the imaging unit 50 through a scanning lens, a reflection mirror, and the like, and the drum surface is scanned and exposed with the laser beam.

  The imaging unit 50 functions to form a toner image to be transferred to the recording paper. Specifically, the imaging units 50Y, 50M, 50C, and 50K form toner images of Y, M, C, and K colors, and each color is associated with the rotational movement of the intermediate transfer belt 61 provided in the transfer separation device 60. The toner image is superposed on the belt and transferred. The imaging units 50Y, 50M, 50C, and 50K are arranged in that order from the upstream side to the downstream side along the rotational movement direction of the intermediate transfer belt 61 that rotates and moves along the width direction of the copying machine 10. .

  The imaging unit 50 includes a cylindrical photosensitive drum 51 (51Y, 51M, 51C, 51K) rotatably supported by a unit main body (casing). The photosensitive drum 51 is disposed with the drum surface in contact with the surface of the intermediate transfer belt 61.

  The imaging unit 50 further applies a charging bias to charge the surface of the photosensitive drum 51 and a charging device 52 (52Y, 52M, 52C, 52K), and the surface of the charged photosensitive drum 51 is irradiated with a laser beam. The developing device 53 (53Y, 53M, 53C, 53K) for developing the electrostatic latent image formed in this way with toner and transferring the toner image from the photosensitive drum 51 to the intermediate transfer belt 61 (1) A neutralization device 54 (54Y, 54M, 54C, 54K) for neutralizing the drum surface after the next transfer) and a cleaning device 55 (55Y, 55M, 55C, 55K) for cleaning the surface of the photosensitive drum 51 that has been neutralized. ing. The developing device 53 includes a developing roller that is disposed facing the photosensitive drum 51 and to which a developing AC bias is applied, a toner supply roller that supplies toner to the developing roller, and the like. The cleaning device 55 includes, for example, a cleaning member such as a blade that is pressed against the surface of the photosensitive drum 51 and slidably contacted when the drum rotates, or a brush roller that is pressed against the surface of the photosensitive drum 51 and rotated following the rotation of the drum. I have.

  In the imaging unit 50, the charging device 52 applies a charging bias having the same polarity as the charging polarity of the toner to the surface of the rotating photosensitive drum 51 to uniformly charge the surface of the drum (charging process). Then, scanning exposure by turning on / off of the laser beam by the laser unit 41 is performed, and an electrostatic latent image having a polarity opposite to that of the toner or a potential difference is formed on the laser beam irradiation portion (latent image forming process). In the developing device 53, the toner supply roller supplies toner to the developing roller, and the developing roller to which the developing AC bias is applied supplies the toner to the surface of the photosensitive drum 51. The toner that has been easily peeled off from the developing roller by applying the developing AC bias is electrostatically attracted to the electrostatic latent image on the photosensitive drum 51, and the electrostatic latent image is visualized by the toner to form a toner image on the drum surface. (Development processing). The photosensitive drum 51 transfers the toner image to the intermediate transfer belt 61 at the primary transfer positions (TY, TM, TC, TK) while rotating. After the transfer of the toner image, the charge eliminating device 54 removes the charge (surface potential) remaining on the surface of the photosensitive drum 51, and the cleaning device 55 removes the toner (transfer residual toner) remaining on the drum surface. It is designed to be scraped off with a brush roller.

  The toner replenishing device 42 functions to supply toner to the developing device 53 of the imaging unit 50. Specifically, the toner replenishing devices 42Y, 42M, 42C, and 42K include Y, M, C, and K toner cartridges that are replaceably loaded in the printer unit 40, and corresponding developing devices 53Y, 53M, The toner consumed by 53C and 53K is replenished from the toner cartridge.

  The toner collection unit 43 functions to collect waste toner from the imaging unit 50. Specifically, the toner collection unit 43 includes a waste toner bottle that is replaceably provided in the front door of the printer unit 40, and is provided by the cleaning devices 55Y, 55M, 55C, and 55K of the imaging units 50Y, 50M, 50C, and 50K. The accumulated transfer residual toner is collected in a waste toner bottle.

  The transfer separation device 60 functions to transfer (secondary transfer) the toner image formed and transferred (primary transfer) by the imaging unit 50 to a recording sheet.

  The transfer / separation device 60 includes an endless intermediate transfer belt 61, a driving roller 62 that stretches the intermediate transfer belt 61 and supports the belt surface in contact with the photosensitive drums 51Y, 51M, 51C, and 51K so as to be rotatable. A plurality of driven rollers 63 and a motor (not shown) that rotationally drives the drive roller 62 to rotate the intermediate transfer belt 61 in a predetermined direction (the direction of arrow A in the figure) are provided. The drive roller 62 is disposed downstream of the photosensitive drum 51K in the rotational movement direction of the intermediate transfer belt 61.

  Further, the transfer separation device 60 is disposed opposite to the photosensitive drums 51Y, 51M, 51C, and 51K with the intermediate transfer belt 61 interposed therebetween, and is driven by the intermediate transfer belt 61 to rotate, and is a primary transfer bias having a polarity opposite to the toner charging polarity. Primary transfer rollers 64Y, 64M, 64C, and 64K that are applied to the drive roller 62 with the intermediate transfer belt 61 interposed therebetween. The secondary transfer roller 61 is driven by the intermediate transfer belt 61 and rotates with the opposite polarity to the charged polarity of the toner. And a secondary transfer roller 65 for applying a transfer bias.

  In the transfer separation device 60, between the primary transfer rollers 64Y, 64M, 64C, and 64K and the photosensitive drums 51Y, 51M, 51C, and 51K, more specifically, the surface of the intermediate transfer belt 61 and the photosensitive drums 51Y and 51M. , 51C, 51K are primary transfer positions TY, TM, TC, TK at which the toner images are primarily transferred from the photosensitive drums 51Y, 51M, 51C, 51K to the intermediate transfer belt 61. Further, between the driving roller 62 and the secondary transfer roller 65, more specifically, the contact portion between the surface of the intermediate transfer belt 61 and the secondary transfer roller 65 causes the toner image to be transferred from the intermediate transfer belt 61 to the recording paper. The secondary transfer position T2 is the next transfer position.

  The transfer separation device 60 further includes a separation charger (not shown) that applies a separation bias to the recording paper after the secondary transfer, a charge removal device (not shown) that removes the intermediate transfer belt 61 after the secondary transfer, and a neutralized intermediate transfer belt. And a cleaning device 66 for cleaning the surface of 61. The cleaning device 66 cleans, for example, a blade that is pressed against the surface of the intermediate transfer belt 61 and slidably contacts when the belt is rotated, or a brush roller that is pressed against the surface of the intermediate transfer belt 61 and is rotated when the belt is rotated. A member is provided.

  The transfer separation device 60 includes a Y-color toner image formed by the imaging unit 50Y, an M-color toner image formed by the imaging unit 50M, a C-color toner image formed by the imaging unit 50C, and an imaging unit. The K color toner images formed by 50K are transferred to the intermediate transfer belt 61 in this order and superimposed, and the color toner images formed by combining the toner images of the respective colors are collectively transferred from the intermediate transfer belt 61 to the recording paper. It is designed to transfer (transfer process).

  More specifically, the drive roller 62 rotates to rotate the intermediate transfer belt 61, and the primary transfer roller 64Y applies a transfer bias at a predetermined timing when the imaging unit 50Y forms a Y-color toner image. . The Y-color toner image formed on the photosensitive drum 51Y is primarily transferred onto the intermediate transfer belt 61 by an electrostatic attraction force due to a reverse polarity bias when reaching the primary transfer position TY. Similarly, when the primary transfer roller 64M applies a transfer bias at a predetermined timing when the imaging unit 50M forms an M color toner image, the M color toner image formed on the photosensitive drum 51M is primary. At the transfer position TM, the Y-color toner image is superimposed and primarily transferred onto the intermediate transfer belt 61. Similarly, the C color toner image formed by the imaging unit 50C and the K color toner image formed by the imaging unit 50K are already transferred onto the intermediate transfer belt 61 at the primary transfer positions TC and TK. The toner images are sequentially superimposed and primarily transferred. As a result, a color toner image is formed on the intermediate transfer belt 61 by combining the toner images of the respective colors Y, M, C, and K.

  Further, the secondary transfer roller 65 applies a transfer bias at a predetermined timing when the primary transfer is performed. When the color toner image formed on the intermediate transfer belt 61 reaches the secondary transfer position T2, the color toner image is secondarily transferred onto the recording paper by an electrostatic adsorption force due to a reverse polarity bias. After the secondary transfer, the separation charger applies a separation bias to the recording paper, and reduces the electrostatic attraction force to the intermediate transfer belt 61 generated on the recording paper to facilitate separation of the recording paper from the intermediate transfer belt 61. . Further, the charge removal device removes the electric charge remaining on the intermediate transfer belt 61, and the cleaning device 66 scrapes off the toner remaining on the belt surface (transfer residual toner) with a blade or a brush roller for cleaning. .

  The fixing device 70 has a function of fixing the toner image on the recording paper by heating and pressing the recording paper on which the toner image is transferred.

  The fixing device 70 includes a pair of fixing rollers 71a and 71b that are opposed to each other and rotatably supported by the apparatus main body (casing), a motor (not shown) that rotationally drives one of the fixing rollers 71a and 71b, a fixing roller 71a, And a gate 72 for suppressing wrinkling of the recording paper by changing the guide position of the recording paper to 71b. The fixing rollers 71a and 71b are composed of a heating roller that generates heat and a pressure roller that is in pressure contact with the heating roller, one of which is driven to rotate by a motor and the other is driven to rotate.

  In the fixing device 70, the recording paper on which the toner image is transferred is guided by the gate 72 to the fixing rollers 71 a and 71 b, and the recording paper is heated and pressed while the fixing rollers 71 a and 71 b rotate to convey the nip. The toner image is fixed on the recording paper (fixing process).

  The first-stage sheet feeding device 80a, the second-stage sheet feeding apparatus 80b, the third-stage sheet feeding apparatus 80c, and the fourth-stage sheet feeding apparatus 80d stack and store recording sheets and transfer them to the transport apparatus 90 one by one when forming an image. It fulfills the function of sending out.

  Each of the paper feeding devices 80a to 80d includes paper feeding trays 81a, 81b, 81c, and 81d on which the recording paper P is stacked and accommodated, and pickup rollers (paper feeding rollers) 82a and 82b that pick up the recording paper P that is loaded and accommodated. 82c, 82d, a pair of feed rollers 83a, 83b, 83c, 83d and retard rollers 84a, 84b, 84c, 84d for feeding the picked-up recording paper P one by one. The three-stage sheet feeding device 80 c further includes a plurality of pairs of transport rollers 85 that transport the fed recording paper P to the transport device 90. Although not shown in the drawings, each of the paper feeding devices 80a to 80d includes a motor that rotationally drives each roller, and a paper feeding clutch (electromagnetic clutch) that can switch transmission and release of rotation from the motor to the pickup roller 82. I have.

  In each of the paper feeding devices 80a to 80d, the pickup rollers 82a to 82d are rotated in a predetermined direction when the motor (paper feeding motor) is rotationally driven and the paper feeding clutch is turned on, and the recordings stacked and accommodated in the paper feeding trays 81a to 81d are recorded. The paper P is picked up and fed between the feed rollers 83a to 83d and the retard rollers 84a to 84d. The feed rollers 83a to 83d and the retard rollers 84a to 84d are arranged such that the retard rollers 84a to 84d rotate in the opposite direction to the pickup rollers 82a to 82d with respect to the plurality of recording sheets P fed in an overlapping manner, and the lower recording sheets The feed rollers 83 a to 83 d are rotated in the same direction as the pickup rollers 82 a to 82 d while suppressing the feeding of P, so that only the uppermost sheet P is fed to the transport device 90. Further, in the three-stage paper feeding device 80c, the recording paper P sent out by the feed roller 83c is nipped and transported by a plurality of pairs of transport rollers 85 and sent out to the transport device 90.

  The manual paper feeding device 80e performs a function of feeding the manually fed recording paper P to the transport device 90 one by one during image formation.

  The manual paper feeder 80e includes a manual tray 81e on which recording paper P to be manually fed can be stacked. Further, a pickup roller (paper feed roller) 82e, a feed roller 83e, and a retarder that perform the same function as the paper feeder 80 are provided. A roller 84e, a motor (not shown), and a paper feed clutch (not shown) are provided. In the manual sheet feeding device 80e, the above-described components operate in the same manner as the sheet feeding device 80, and the recording paper P manually fed to the manual tray 81E is sent to the transport device 90 one by one.

  The conveying device 90 conveys the recording paper P sent from each of the paper feeding devices 80a to 80d and the manual paper feeding device 80e to pass the secondary transfer position T2 of the transfer separating device 60 and the fixing device 70, and also to the fixing device. The recording paper P (printed material) sent out from 70 is discharged to the discharge tray 45 or the discharge box 46.

  The conveyance device 90 includes a passage member (not shown) that forms a passage (conveyance path) for the recording paper P, and a paper-feed-side passage (feed) from each of the paper feeding devices 80a to 80d and the manual paper feeding device 80e to the transfer separation device 60. A plurality of pairs of transport rollers 91a to 91a arranged at predetermined intervals along the paper path) (intervals shorter than the size of the minimum size recording paper in the feed direction) and provided corresponding to each of the paper feeding devices 80a to 80d. 91d, a pair of timing rollers 92 disposed in front of the transfer separation device 60 (secondary transfer position T2) in the same path, and a pair disposed in a paper discharge side path (paper discharge path) after the fixing device 70. Transport rollers 91e, a pair of discharge rollers 93 for discharging the recording paper P from the passage to the discharge tray 45, a pair of discharge rollers 94 for discharging the recording paper P from the passage to the discharge box 46, and each roller The A motor (not shown) that rotates and drives, a discharge switching guide 95 as a switching unit that switches the discharge destination of the recording paper P to the discharge tray 45 side or the discharge box 46 side, and a solenoid that displaces (switches) the discharge switching guide 95. And a drive source (not shown). The discharge path is branched into a path (tray-side discharge path) that leads to the discharge tray 45 and a path (box-side discharge path) that leads to the discharge box 46 from the middle. Is disposed in the paper discharge branching section.

  On the paper feed path side, the transport device 90 holds the recording paper P sent from each of the paper feed devices 80a to 80d and the manual paper feed device 80e by the transport rollers 91a to 91d to the timing roller 92 along the paper feed path. Then, the timing roller 92 is rotated at a predetermined timing synchronized with the secondary transfer operation, and is sent to the secondary transfer position T2 of the transfer separation device 60. On the paper discharge path side, when the recording paper P sent out from the fixing device 70 is nipped and conveyed by the conveyance roller 91e and sent to the paper discharge path, and the recording paper P is discharged to the paper discharge tray 45, a discharge switching guide 95 is provided. The recording paper P is guided to the tray-side paper discharge passage, and the discharge roller 93 is rotated and sandwiched and discharged to the paper discharge tray 45. When the recording paper P is discharged to the paper discharge box 46, the discharge switching guide 95 guides the recording paper P to the box-side paper discharge passage, and the discharge roller 94 rotates and pinches and is discharged to the paper discharge box 46. ing.

  The reversing unit 90a performs a function of reversing the recording paper P, which has been printed on one side (front surface), when performing double-sided printing.

  The reversing unit 90a includes a passage member 96 that forms a front and rear reversing path for reversing the front and rear of the recording paper P, a reversing switching guide 97 that switches the recording paper P feed direction to the discharge side or the front and rear reversing path, and a reversing switching guide. A drive source (not shown) such as a solenoid for displacing (switching operation) 97, a pair of reverse rollers 98 disposed in the front-rear reverse path, and a motor (not shown) that rotationally drives the reverse roller 98 are provided. The front / reverse reversing path branches off from the front of the paper discharge branch (discharge switching guide 95) in the paper discharge path, and the reverse switching guide 97 is arranged at the reverse branch.

  The reversing unit 90a guides the recording paper P, which has been printed on the front surface during double-sided printing and is sent out from the fixing device 70, to the front / reverse reversing path by the reversing switching guide 97, and the reversing roller 98 rotates in a predetermined direction so that the recording paper P Nipping and conveying until the rear end passes through the reverse switching guide 97. When the trailing edge of the recording paper P passes through the reversal switching guide 97, the reversing roller 98 rotates in the reverse direction so that the recording paper P is nipped and conveyed in the reverse direction, and the front and back of the recording paper P are reversed and sent to the double-sided portion 82. It has become.

  The double-sided portion 90b performs a function of reversing the recording paper P fed from the reversing portion 90a upside down and returning it to the front of the timing roller 92 in the paper feed path when double-sided printing is performed.

  The double-sided portion 90b has a passage member 99 that forms a front / back reversing path for reversing the front and back of the recording paper P between the front / reverse reversing path of the reversing unit 90a and the paper feeding path, A plurality of pairs of transport rollers 91f to 91i arranged at intervals and a motor (not shown) that rotationally drives the transport rollers 91f to 91i are provided. The front / back reversing path is extended so as to make a half turn from the connection side with the front / rear reversing path toward the connection side with the sheet feeding path.

  The double-sided portion 90b reverses the front and back of the recording paper P while the conveying rollers 91f to 91i hold and convey the recording paper P fed back and forth from the reversing portion 90a along the front and back reversing paths, and sends them out to the paper feeding path. It is like that. The timing roller 92 is a secondary transfer position T2 at a predetermined timing in synchronism with the secondary transfer operation on the back side of the recording paper P that has been printed on the front side and turned upside down from the double sided part 90b during the reverse side printing in the double sided printing. To send out.

  Further, the transport device 90 includes a plurality of recording paper position detection units 49 (see FIG. 3) for detecting the position of the recording paper P at predetermined positions in each path, including the reversing unit 90a and the double-sided unit 90b. The recording paper position detection unit 49 is, for example, a recording paper detection member that is displaced in contact with the leading end of the recording paper P that moves in the passage and reversely displaces when the trailing edge is detached as the recording paper P passes, and a recording paper detection unit. It comprises a displacement detection sensor that converts the mechanical displacement of the member into an electrical signal and outputs it. As the displacement detection sensor, a switch type sensor that outputs an off / on signal or a low / high signal according to the displacement of the recording paper detection member can be used.

  The recording paper position detection unit 49 outputs an OFF signal or a Low signal when the recording paper detection member is in a steady position, and when the recording paper detection member is displaced in contact with the recording paper P, The displacement detection sensor outputs an on signal or a high signal. The front and rear ends of the recording paper P can be detected from the change in the electrical signal, and the position of the recording paper P can be detected.

  The recording paper position detection unit 49 is, for example, in the vicinity of the exit of each of the paper feeding devices 80a to 80d and the manual paper feeding device 80e in the paper feeding path of the conveying device 90 (on the rear side of the feed rollers 83a to 83d) Before 92, behind the fixing device 70 in the paper discharge passage (before the reverse switching guide 97), before the discharge roller 93, before the discharge roller 94, and behind the reverse switching guide 97 in the front-rear reverse path of the reverse portion 90a. Further, it is disposed in the middle of the passage or in the vicinity of the exit in the front and back inversion path of the double-sided portion 90b.

  The processing device 44 is disposed in front of the discharge roller 93 in the tray-side discharge path, and does not perform a processing process that applies abnormal processing to the recording paper P discharged to the paper discharge tray 45 and an abnormal processing. It fulfills the function of switching between non-processing.

  The processing device 44 is a contact member that contacts and separates one or more of a cutter, a stamp, and a magic as a processing member that performs abnormal processing and the recording paper P that passes through the tray-side paper discharge passage. And a drive source for the contact / separation mechanism. A plurality of types of processing members may be provided, or a plurality of the same types may be provided. When a plurality of types of processing members are provided, they may be brought into contact with and separated from the recording paper P individually. The contact operation of the processed member may be performed continuously or intermittently. For example, in the case of a cutter or magic, the recording paper P may be contacted continuously, and in the case of a stamp, the recording paper P may be contacted intermittently.

  The processing device 44 does not apply abnormal processing to the recording paper P when the processing member is displaced in the separation direction (non-processing processing), and applies abnormal processing to the recording paper P when the processing member is displaced in the contact direction. (Processing). The details of the abnormal processing are cutting processing in which when the processing member is a cutter, the cutter comes into contact with the recording paper P being conveyed and cuts the recording paper P. In the case where the processing member is a stamp or a magic, it is a drawing process in which the stamp or the magic comes into contact with the recording paper P to be conveyed to perform abnormal drawing such as marking or graffiti.

  The paper discharge tray 45 functions to receive the recording paper P discharged from the printer unit 40.

  The paper discharge tray 45 is provided in the upper part of the printer unit 40, and a part of the periphery (front side and left side) is opened, so that the recording paper P can be taken out from the tray. The paper discharge tray 45 is a discharge unit from which the discharged recording paper P can be taken out by a user of the copier 10 or the like.

  The paper discharge box 46 functions to store and store the recording paper P discharged from the printer unit 40.

  The paper discharge box 46 is disposed on the lower side of the paper discharge tray 45 and is formed in a box shape in which a storage space for storing the recording paper P is provided. The paper discharge box 46 includes an opening / closing door 47 that opens and closes the box and a locking device 48 that locks and unlocks the opening / closing door 47, and unlocks the locking device 48 to open the opening / closing door 47. Thus, the recording paper P in the box can be taken out. The locking device 48 can be unlocked only by a service provider or a manager (field engineer) who stores the key of the locking device 48 and cannot be unlocked by a user of the copier 10 or the like. It has become. The paper discharge box 46 is a discharge unit (accommodating unit) from which the discharged recording paper P cannot be taken out by a user of the copying machine 10 or the like.

  FIG. 3 shows a schematic configuration of a control system in the copying machine 10. The copying machine 10 includes a CPU (Central Processing Unit) 11 serving as a control unit, a ROM (Read Only Memory) 13, a RAM (Random Access Memory) 14, a nonvolatile memory 15, and a hard disk device 16 ( The operation display unit 17, the communication unit 18, the image processing unit 19, the automatic document feeder 20, the scanner unit 30, and the printer unit 40 are connected to each other. .

  The CPU 11 controls the operation of the copying machine 10 based on a program stored in the ROM 13. In detail, the automatic document feeding operation performed by the automatic document feeder 20 described above, the document reading operation performed by the scanner unit 30, the image forming operation (copying printing / output operation of the document) performed by the printer unit 40, and the like. Control.

  The RAM 14 is used as a work memory for temporarily storing various data when the CPU 11 executes a program, and is also used for an image memory for temporarily storing image data. The nonvolatile memory 15 is a memory that retains memory even when the power is turned off, and stores device-specific information and various setting information.

  The hard disk device 16 is an operating system (OS) for operating the copying machine 10, application programs for operating various functions of the copying machine 10, charging in image formation, latent image formation, development, transfer / separation, static elimination, fixing. In addition to storing processing condition information for each process (indicated as “process information” in the figure) and various types of saved data, it also saves image data of the original document and image data for abnormal conditions described later that are used in the event of an abnormality. To do. Details of the processing condition information of the image forming process include a control parameter for charge control including a charge applied voltage value, a control parameter for laser beam emission control, a control parameter for development control including a development applied voltage value, and a transfer applied voltage value. These include a control parameter for transfer control, a control parameter for separation control, and a control parameter for fixing control.

  The operation display unit 17 functions as a display unit for displaying various operation screens and guidance screens to a user of a copying service by the copying machine 10 and receives operations and inputs performed by the user on the copying machine 10. It functions as an operation unit. Here, the operation display unit 17 includes a liquid crystal display, a touch panel provided on the screen, and various switches such as an execution button (start button).

  The functions and configurations of the automatic document feeder 20, the scanner unit 30, and the printer unit 40 are as described above. An electrical signal output from the recording paper position detection unit 49 of the printer unit 40 is input to the CPU 11. Based on this input signal, the CPU 11 grasps the position of the recording paper P conveyed in the printer unit 40.

  The image processing unit 19 performs a function of performing various kinds of image processing such as image correction, rotation, enlargement / reduction, compression / expansion on the image data. The communication unit 18 functions to communicate with the charging apparatus 100 through the cable 7 connected to the charging apparatus 100.

  When the communication with the charging apparatus 100 by the communication unit 18 is normally performed by executing the program, the CPU 11 performs normal image formation output processing (normal copy printing / output processing) on the printer unit 40. In addition, when an abnormality occurs in the communication, the printer unit 40 performs a function of performing an abnormal image formation output process (an abnormal copy printing / output process). Hereinafter, a normal image formation output process may be abbreviated as “normal process”, and an abnormal image formation output process may be abbreviated as “non-normal process”.

  The details of the normal processing are as follows: when copying and printing a document, the printer unit 40 forms and outputs an image on recording paper based on the image data acquired by the scanner unit 30, and predetermined processing conditions set in advance. Processing for performing the image forming process with (control parameter), processing for preventing the wrinkle from being generated on the recording paper by the nip conveyance by the fixing rollers 71a and 71b when the gate 72 of the fixing device 70 guides the recording paper P to a predetermined position, and processing For example, the apparatus 44 does not abnormally process the recording paper, and the recording paper is discharged to the paper discharge tray 45.

  The details of the abnormal process include a process in which the printer unit 40 forms and outputs an abnormal image on recording paper based on the abnormal image data stored in the hard disk device 16 when copying and printing a document. Processing for changing the processing conditions to perform an image forming process, processing for generating wrinkles on the recording paper by nip conveyance by the fixing rollers 71a and 71b, processing for applying abnormal processing to the recording paper by the processing device 44, and recording paper For example, a process of discharging the paper to the paper discharge box 46. The processing condition changed in the image forming process is a transfer bias in the present embodiment.

  Which process of the above example is executed as the abnormal process is determined based on the position of the recording sheet and the timing of the image forming process that the CPU 11 grasps based on the input signal from the recording sheet position detection unit 49. An analysis is made to determine whether the process is feasible. The analysis, determination, and execution of the abnormal processing may be performed by the image processing unit 19 in addition to being performed by the CPU 11 or may be performed in part by the image processing unit 19.

  Further, the CPU 11 transmits a charging signal to the charging device 100 at a predetermined timing when the copy-recorded recording paper P (printed material) is discharged to the paper discharge tray 45. For example, a billing signal is transmitted with the detection of the recording paper by the recording paper position detection unit 49 arranged in the paper discharge passage as a trigger.

  FIG. 4 shows a communication procedure performed between the copying machine 10 and the billing apparatus 100.

  When the power is turned on and the initialization is completed, the copying machine 10 performs polling for confirming the connection to the charging apparatus 100 (P1; Polling). If the power supply is turned on and the initialization is completed, the charging apparatus 100 responds to the connection confirmation polling from the copying machine 10 (P2; Polling Answer). When the copying machine 10 receives a response from the charging apparatus 100, the copying machine 10 establishes a connection with the charging apparatus 100 and is ready to execute a copying service.

  When a copy service user or the like sets a copy mode such as color / monochrome, single-sided / double-sided, print size, number of prints, etc. through the operation display unit 17 of the copy machine 10, the copy machine 10 is charged according to the copy mode. Is transmitted to the charging apparatus 100, and the charging mode is set (P3; Mode Set). In addition to the copy mode setting operation, the user or the like can also set a document on the document tray 21 or the platen glass 31 of the automatic document feeder 20 (see FIG. 2) and input a service usage fee to the charging device 100. Perform together.

  When the execution button (start button) of the operation display unit 17 is pressed, the copying machine 10 executes copy printing and transmits a charging signal to the charging apparatus 100 at a predetermined timing for outputting a printed matter (P4; Sequence). Command). When the charging apparatus 100 receives the charging signal from the copying machine 10, the charging apparatus 100 charges by copying a predetermined copying fee per sheet according to the charging mode from the total amount that has been input. When a plurality of copies are continuously printed, the copying machine 10 repeats the operation of transmitting a billing signal once every time one printed matter is output until all the copies are printed / output. . Each time the charging apparatus 100 receives a charging signal, the charging apparatus 100 repeatedly performs a charging operation for collecting a copy fee per sheet from the input amount.

  Further, the copying machine 10 repeatedly performs polling of connection confirmation with respect to the charging apparatus 100 at a predetermined time interval (P5; Polling). The billing apparatus 100 responds every time polling is received from the copying machine 10, and returns a billing mode as necessary (P6; Polling Answer + Mode Answer).

  If the response from the charging apparatus 100 cannot be received a predetermined number of times in succession, the copying machine 10 determines that the connection with the charging apparatus 100 is interrupted, that is, an abnormality has occurred in communication with the charging apparatus 100. To do. For example, polling of connection confirmation is performed every 10 msec, and it is determined that a communication abnormality has occurred when a response cannot be received three times in succession.

  If a communication error occurs before copying printing (before feeding), the copying machine 10 (CPU 11) displays an error message or the like on the operation display unit 17 without executing copying printing. When copy printing is in progress (during copy printing for a fed recording sheet), in detail, if a communication error occurs between the start of feeding and before the billing signal is sent, the paper is fed. Since the normal copy image is printed on the recording paper P and may be output without charge, the copying machine 10 performs the above-described abnormal processing on the recording paper P that has already been fed. If a communication error occurs during continuous execution of a plurality of copies, the copying machine 10 does not feed a new sheet after the occurrence of a communication error, and the last recording sheet P is fed. When the abnormal processing is finished, the copy printing operation is stopped and the above error message or the like is displayed. Such a communication abnormality occurs, for example, due to a failure or abnormal operation of the charging apparatus 100, disconnection of the power plug, disconnection of the communication connection cable 7, or the like.

  Next, specific contents of the abnormal process will be described.

  FIG. 5 shows an example of the recording paper P (printed material) output by replacing the image of the document N with the abnormal images (Pa, Pb, Pc).

  The image for abnormality is an image of a warning or warning Pa for notifying the user of the abnormality, an image Pb for advertisement or promotion related to the copying machine 10 or its manufacturer, service to be provided, or a logo mark such as a manufacturer or brand. For example, an image Pc. A manufacturer, a service provider, or the like creates data of these images Pa, Pb, and Pc in advance, and stores them in the hard disk device 16 of the copying machine 10 as abnormal image data as described above.

  The copying machine 10 has an abnormality in communication with the billing apparatus 100 during execution of copy printing, before the formation of an electrostatic latent image in the image forming process (before the laser beam is emitted), and when the abnormality occurs from the hard disk device 16. If the timing is such that the image data can be read and replaced, a printed matter on which the above-described abnormal image is printed can be output. In this case, it is possible to prevent a printed matter obtained by copying and printing a normal image (image of the original document N) without charge, and use a printed matter that is output without charge by a manufacturer or a service provider. As a result, warnings and advertisements can be given to users of the service.

  FIG. 6 shows a schematic configuration of fixing rollers 71 a and 71 b and a gate 72 provided in the fixing device 70.

  In the nip conveyance of the recording paper by the fixing rollers 71a and 71b, the recording paper is fed while being subjected to high heat and high pressure while being sandwiched between the rollers, so that wrinkles are likely to occur particularly in the case of thin recording paper. Therefore, the generation of wrinkles is suppressed by using a crown-shaped roller and providing a gate 72 capable of changing the guide position of the recording paper.

  In the present embodiment, one of the pair of fixing rollers 71a and 71b has a crown shape, and the other has a corresponding reverse crown shape. Specifically, as shown in FIG. 6 (A), the right fixing roller 71a has a convex curved crown shape, and the left fixing roller 71b has a concave curved reverse crown shape, and the axes thereof are parallel to each other. When the roller surface is brought into contact, the contact portion comes into close contact with each other to form a curved nip portion.

  As shown in FIGS. 6B and 6C, the fixing device 70 includes a casing 70a that constitutes the apparatus main body. In the casing 70 a, a carry-in path 73 for carrying the recording paper P that has passed the secondary transfer position T <b> 2 into the fixing device 70 is formed in communication with the transfer separation device 60. The fixing rollers 71a and 71b are disposed opposite to each other on the left and right, and the nip portion is positioned on the downstream side (upper side in the drawing) of the carry-in path 73 and is supported by the casing 70a. The carry-in path 73 extends obliquely upward to the right from the secondary transfer position T <b> 2 side, and the lower left peripheral surface portion of the crown-shaped fixing roller 71 a is located on the extension line of the carry-in path 73.

  The gate 72 is a guide plate 74 as a guide portion that changes the guide position of the recording paper P by being tilted, a support shaft 75 that supports the guide plate 74 so as to be tiltable, and a drive source that tilts and displaces the guide plate 74. The solenoid 76, the compression coil spring 77 as a biasing member that biases the guide plate 74 in the direction opposite to the driving direction of the solenoid 76, and the tilting position of the guide plate 74 biased by the compression coil spring 77 are regulated. And a stopper pin 78.

  The support shaft 75 is provided on the right side of the carry-in path 73 formed in the casing 70a. The guide plate 74 corresponds to the carry-in path 73 and has a guide hole 74a for guiding the recording paper P formed therein, and a support hole 74b corresponding to the support shaft 75 is formed at the base end. The guide plate 74 is tilted about the support shaft 75 with the support hole 74b of the base end portion being inserted and supported by the support shaft 75 in a posture in which the front end portion faces the nip portion side (upper side in the drawing) of the fixing rollers 71a and 71b. It is possible. A stopper portion 74 c projects from the proximal end portion of the guide plate 74 to the opposite side of the carry-in path 73. The stopper pin 78 is attached to the casing 70a corresponding to the stopper portion 74b.

  The solenoid 76 is composed of a solenoid body 76a incorporating a cylindrical coil, and a movable iron core 76b inserted movably along the axis of the coil of the solenoid body 76a, and is generated by energizing the coil. The movable iron core 76b is attracted and fixed to the solenoid body 76a by electromagnetic force, and the movable iron core 76b is released from fixing by de-energization. The solenoid 76 is disposed on the opposite side (right side in the figure) of the carry-in path 73 with respect to the guide plate 74, and the moving direction of the movable iron core 76b is set substantially perpendicular to the carry-in path 73 and the guide plate 74. The solenoid body 76a is attached to the casing 70a. The movable iron core 76 b of the solenoid 76 is connected to the vicinity of the center portion of the guide plate 74 at the tip end protruding from the solenoid body 76 a. The compression coil spring 77 is arranged on the upper side of the solenoid 76 and is attached in a direction substantially parallel to the movable iron core 76b with one end (free end) abutting against the tip of the guide plate 74. The guide plate 74 is urged toward the fixing roller 71b by force.

  The guide plate 74 is biased by the compression coil spring 77 and tilts toward the fixing roller 71b, and as shown in FIG. 6B, the stopper portion 74b contacts the stopper pin 78 and tilts toward the fixing roller 71b. The position is restricted. In this state, the guide plate 74 is in a substantially vertical posture, and is fixed in a posture in which the tip end portion faces the nip portion side of the fixing rollers 71a and 71b.

  When the solenoid 76 is energized and driven, the movable iron core 76b is attracted to the solenoid body 76a against the spring force (biasing force) of the compression coil spring 77 as shown in FIG. The insertion end is brought into contact with and fixed. Accordingly, the guide plate 74 is pulled by the movable iron core 76b and tilted toward the fixing roller 71a to be fixed. In this state, the guide plate 74 is inclined with the tip end directed toward the lower left peripheral surface of the fixing roller 71 a and is in an attitude along the carry-in path 73. When the energization of the solenoid 76 is released, the guide plate 74 is urged by the compression coil spring 77 and returns to the original orientation toward the nip portion.

  As described above, the gate 72 changes the guide position of the recording paper P sent from the carry-in path 73 to the fixing rollers 71 a and 71 b with respect to the roller by the tilt displacement of the guide plate 74. Further, the CPU 11 performs energization control of the solenoid 76.

  FIG. 7 shows a comparison between the case where no wrinkle is generated on the recording paper P and the case where it occurs due to the nip conveyance by the fixing rollers 71a and 71b.

  As shown in FIG. 7A, when the guide plate 74 is inclined along the carry-in path 73, the recording paper P carried into the fixing device 70 along the carry-in path 73 does not change the traveling direction. Then, it is guided to the fixing roller 71a side along the guide hole 74a. When the leading edge of the recording paper P comes into contact with the fixing roller 71a, the recording paper P is drawn into the nip portion with the fixing roller 71b by the rotation of the fixing roller 71a. Since the fixing roller 71a has a convex curved crown shape, the recording paper P is drawn from the central portion to both outer sides (both end portions of the roller) along the convex curved surface of the roller so as to be adapted to the nip portion. Thus, even when the recording paper P is conveyed while being heated and pressurized at the nip portion, as shown in FIG. 7B, it is conveyed and sent out without wrinkles.

  As shown in FIG. 7C, when the guide plate 74 faces the nip portion side of the fixing rollers 71a and 71b, the recording paper P carried from the carry-in path 73 is moved to the nip portion side by the guide hole 74a. Guided. When the recording paper P directly enters the nip portion, the recording paper P is drawn without being stretched as described above. Therefore, the heating and pressurization at the nip portion generates wrinkles as shown in FIG. It becomes like this. This wrinkle usually occurs randomly without periodicity over the entire paper surface.

  FIG. 8 shows the operation timing of the main part related to the color image forming process and paper feeding and paper ejection in the printer unit 40. In this figure, the A4 size recording paper is fed and transported from the two-stage paper feeding device 80b by lateral feed and discharged to the paper discharge tray 45, and the paper width direction dimension 210mm, which is the feed direction, is 240mm / sec. An example of operation timing in the case of process processing at high speed is shown. The timing reference in the figure is the paper feed start timing, and the scale lines in the figure are shown at 500 msec intervals. In addition, the CPU 11 controls the operation of each unit shown in the figure.

  The process of forming toner images of Y, M, C, and K is timed in the order of Y, M, C, and K so that the toner images of each color are aligned and overlapped at each primary transfer to the intermediate transfer belt. Done out of place. The timing shift amount (delay time) is theoretically determined by the circumferential length (diameter) and rotational speed (rotational movement speed of the intermediate transfer belt) of each of the Y, M, C, and K photoconductive drums, and the interval between the primary transfer positions. A value is obtained, and a design value considering an error is determined in advance.

  When feeding from the two-stage sheet feeding device 80b is started, the respective motors of the conveying rollers 91a and 91b provided in the sheet feeding path of the conveying device 90 shown in FIG. Rotate. The motor of the conveyance roller 91b provided corresponding to the two-stage sheet feeding device 80b is represented as “two-stage vertical conveyance motor” in FIG. The rotation period of the conveyance roller 91b is a rotation driving period of the two-stage vertical conveyance motor. The motor of the conveyance roller 91a provided corresponding to the first-stage sheet feeding device 80a is represented as “one-stage vertical conveyance motor” in FIG. The rotation period of the conveyance roller 91a is the rotation driving period of the one-stage vertical conveyance motor.

  The recording sheet P sent out from the two-stage sheet feeding device 80b to the sheet feeding path of the conveying device 90 is conveyed upward by the conveying roller 91b, further conveyed upward by the conveying roller 91a, and conveyed to the timing roller 92. . When the leading edge of the recording paper P reaches the timing roller 92, the conveyance rollers 91a and 91b temporarily stop rotating and wait for the recording paper P.

  Although not shown in FIG. 8 along with this paper feeding / conveying, charging of the photosensitive drum and irradiation of the laser beam onto the drum are performed with a predetermined timing shift in the order of Y, M, C, K. The electrostatic latent images are sequentially formed on each drum.

Further, as shown by “Development AC Y”, “Development AC M”, “Development AC C”, and “Development AC K” in the figure, the development AC bias is shifted by a predetermined timing in the order of Y, M, C, and K. Applied. The electrostatic latent images on the drums are sequentially developed, and toner images of the respective colors are sequentially formed on the drums. Each color toner image is conveyed to each primary transfer position with a predetermined timing shift as each drum rotates, and “primary transfer Y”, “primary transfer M”, “primary transfer C”, “ As indicated by “primary transfer K”, primary transfer is sequentially performed on the intermediate transfer belt in the order of Y, M, C, and K. By this primary transfer, the toner images of the respective colors are overlapped and synthesized with their positions aligned on the intermediate transfer belt. The combined color toner image is conveyed to the secondary transfer position as the intermediate transfer belt rotates.

  When the timing of feeding the recording paper P to the secondary transfer position T2 (predetermined timing before the start of "secondary transfer" in the figure) comes with the progress of the image forming process, the motors of the timing roller 92 and the transport rollers 91a and 91b Are driven to rotate synchronously, and each roller rotates. The motor of the timing roller 92 is denoted as “timing motor” in FIG. The rotation period of the timing roller 92 is a rotation driving period of the timing motor.

  When the timing roller 92 and the conveyance rollers 91a and 91b rotate, the recording paper P that has been waiting is moved to the secondary transfer position T2 in accordance with the conveyance timing of the color / toner image to the secondary transfer position T2 by the intermediate transfer belt. It is sent. When passing through the secondary transfer position T2, the color toner image is transferred from the intermediate transfer belt at the timing indicated by “secondary transfer” in the drawing. Further, a separation bias is also applied at a predetermined timing indicated by “static elimination” in the drawing. Each of the above rollers stops rotating as soon as it finishes the role of feeding the recording paper P sequentially from the upstream side of the paper feed path.

  When a predetermined timing arrives before the leading edge of the recording paper P passes through the secondary transfer position T2 and is carried into the fixing device 70, the solenoid 76 of the gate 72 is driven, and the guide plate 74 is fixed to the crown-shaped fixing roller 71a. (See FIGS. 6 and 7). The solenoid 76 of the gate 72 is represented as “gate switching SL” in FIG. The switching period of the gate 72 (guide plate 74) is a driving period of the gate switching SL.

  The recording paper P carried into the fixing device 70 is drawn into the nip portion while being guided by the guide plate 74 toward the crown-shaped fixing roller 71a. The fixing rollers 71a and 71b heat and press the recording paper P while carrying the nip to fix the toner image, and send out the recording paper P without wrinkles. The gate 72 (guide plate 74) is switched and stopped at a predetermined timing when the guide of the recording paper P to the fixing rollers 71a and 71b is finished.

  When a predetermined timing arrives before the leading edge of the recording paper P passes through the fixing device 70 and reaches the discharge roller 93, the motor of the discharge roller 93 is driven to rotate, and the discharge roller 93 rotates. The motor of the discharge roller 93 is described as “discharge motor” in FIG. The rotation period of the discharge roller 93 is the rotation drive period of the discharge motor. The recording paper P that has passed through the fixing device 70 is discharged to the paper discharge tray 45 by the discharge roller 93. When the recording paper P is detected by the recording paper position detection unit 49 in the discharge path, the copying machine 10 transmits a charging signal to the charging device 100 (charging timing). The discharge roller 93 stops rotating as soon as the recording paper P is discharged.

  The operation timings of the main parts relating to the color image forming process and paper feeding and paper ejection are as described above. In this operation timing, the timing at which the abnormal image described in FIG. 5 can be formed in color is 875 msec before the start of Y-color development, which is 700 msec from the start of paper feeding (in the figure). R1). The timing at which an abnormal image can be formed in black and white is 875 msec before the start of development of the K color, which is 1.6 sec from the start of paper feeding (R2 in the figure).

  Further, if an abnormality occurs in communication with the charging apparatus 100 after these timings, the secondary transfer bias is 875 msec before the secondary transfer is started (up to about 3.3 sec from the start of feeding). By turning OFF, it is possible to output the recording paper P on which the secondary transfer is not normally performed and the normal image is not printed. That is, when the toner image on the intermediate transfer belt 61 is not normally transferred to the recording paper P, it is possible to output a printed material that is blank or partially blank (blank) (R3 and R4 in the figure). , R5).

  If a communication error occurs after 875 msec before the secondary transfer, the gate 72 is not switched and the recording paper P is not switched until the recording paper P is carried into the fixing device 70. By directly entering the nip portions of the fixing rollers 71a and 71b, the recording paper P is wrinkled by nip conveyance at the time of fixing, and can be output in an abnormal state (R6 in the figure).

  If a communication error occurs after the recording paper P is carried into the fixing device 70, as described above, the processing device 44 applies abnormal processing to the recording paper P and outputs it (R7 in the figure). Alternatively, the recording paper P can be output to the paper discharge box 46 without being discharged to the paper discharge tray 45 and stored and stored (R8 in the figure).

  Next, the operation of the copying machine 10 will be described.

  FIG. 9 shows a flow of charging processing and abnormal processing at the time of copying printing / output by the copying machine 10. When the copying machine 10 is activated, the CPU 11 starts this processing (Start), and performs connection confirmation (Polling) with the charging apparatus 100 (step S101).

  When it is confirmed that the connection is normal (step S102; No), the CPU 11 determines whether it is the charging timing (step S103). If it is not the charging timing (step S103; No), the process returns to step S101. If it is billing timing (step S103; Yes), normal billing processing is performed (step S104). Specifically, the CPU 11 transmits a charging signal to the charging apparatus 100 at a predetermined charging timing for outputting the recording paper P that has been copied and printed. In the case where a plurality of copies are continuously printed, the CPU 11 performs an operation of transmitting a billing signal once to the billing apparatus 100 each time one copy of the recording paper P after the copy printing is completed. Repeat until printing / output is complete. Each time the charging apparatus 100 receives a charging signal, the charging apparatus 100 repeatedly performs a charging operation for collecting a copy fee per sheet from the input amount. Then, the CPU 11 ends this processing (End) after completing the accounting processing, and puts the copying machine 10 in a standby state.

  When it is confirmed that there is an abnormality in the connection with the charging apparatus 100 (step S102; Yes), the CPU 11 performs an abnormality determination process (step S105) and confirms the position of the recording paper P (step S106).

  As a result of confirming the position of the recording paper P, if it is a timing at which replacement with an abnormal image is possible (step S107; Yes), the CPU 11 performs an abnormal image forming process (step S108) and ends this process. (End). In this case, a printed matter on which an image for an abnormality is printed, for example, a printed matter on which an image such as the above-mentioned caution or warning, advertisement, or advertisement is printed.

  Although it is not the timing at which the image can be replaced with the abnormal image (step S107; No), if it is a timing at which an abnormal transfer process can be performed (step S109; Yes), the CPU 11 turns off the transfer bias and performs the transfer process. Is performed (step S110), and this processing is terminated (End). In this case, a blank printed matter is output.

  Although it is not the timing at which an abnormal transfer process can be performed (step S109; No), if it is the timing at which an abnormal fixing process can be performed (step S111; Yes), the CPU 11 sets the gate 72 to an abnormal position and performs the fixing process. Is performed (step S112), and this processing is terminated (End). In this case, a printed matter with wrinkles is output.

  If it is not the timing at which an abnormal fixing process can be performed (step S111; No), the CPU 11 performs a processing process that adds abnormal processing to the recording paper P by the processing device 44, or outputs the recording paper P to the paper discharge box 46. Then, the accommodation process is performed (step S113), and this process ends (End). In this case, a printed material that has been subjected to abnormal processing such as cutting or drawing is output, or the output printed material is stored and stored in the paper discharge box 46, and the user cannot obtain the printed material.

  In the case of the operation timing shown in FIG. 8, the relationship between each determination step of the above steps S106, S108, and S110 and the timing is as follows.

For color copy printing,
(1) The timing at which switching to an abnormal image is possible (step S106; Yes) is 700 msec from the start of feeding (R1).
(2) The timing when the image for abnormal use cannot be replaced (Step S106; No) and the abnormal transfer process (blank sheet) is possible (Step S108; Yes) is 700 msec to 2500 msec (R3).
(3) The abnormal transfer process (white paper) is impossible (step S108; No), and the timing at which the abnormal fixing process is possible (step S111; Yes) is 2500 msec to 3800 msec (R6).
(4) The timing at which abnormal fixing processing is impossible (step S111; No) and abnormal processing or accommodation processing is possible (step S111; Yes) is from 3800 msec (R7 / R8).

  When “blank paper” in step S109 is set to “blank paper or blank”, the above (2) is 700 msec to 3300 msec (R3 + R5), and 2500 msec to 3300 msec of those are “white blank” (R5). (3) is 3300 msec to 3800 msec.

For black and white copy printing,
(1) The timing at which replacement with an abnormal image is possible (step S106; Yes) is from the start of paper feed to 1600 msec (R2).
(2) The timing when the image for abnormal use cannot be replaced (step S106; No) and the abnormal transfer process (blank sheet) is possible (step S108; Yes) is 1600 msec to 2500 msec (R4).
(3) An abnormal transfer process (blank paper) is impossible (Step S108; No), an abnormal fixing process is possible (Step S111; Yes), and (4) An abnormal fixing process is not possible. It is possible (step S111; No), and the timing (step S111; Yes) at which abnormal processing or accommodation processing is possible is the same timing as in the case of color.

  When the “blank” in step S109 is “blank and blank”, the above (2) is 1600 msec to 3300 msec (R4 + R5), and 2500 msec to 3300 msec is “blank” as in the case of color. (R5). (3) is 3300 msec to 3800 msec.

  In consideration of the cost of recording paper and the like, when emphasizing the use of paper by printing out abnormal images, it is desirable to operate in the priority order of (1)> (2)> (3), (4). . In consideration of the cost of toner, it is desirable to omit (1) and operate in the priority order of (2)> (3), (4). In this case, a normal toner image is not formed if the toner image formation timing is met (laser beam irradiation stop, charging application voltage stop, development application voltage stop, etc.). It is more desirable to operate so as to cope with the processing in (2) and after.

  As described above, in the copying machine 10 according to the present embodiment, when the communication with the charging apparatus 100 is normally performed, normal copying / printing processing is performed. By this normal processing, a normal printed matter, that is, a printed matter in a normal state in which normal copy printing has been performed, is output to a normal discharge tray 45 that can be taken out by a user or the like. If an abnormality occurs in communication with the billing apparatus 100 after the start of paper feeding, the abnormal recording / printing / output processing is performed and output without jamming the fed recording paper P. As a result of this abnormal processing, an abnormal printed material is output to the paper discharge tray 45, or the printed material is output to the paper output box 46 that cannot be taken out by the user. When a printed matter is output abnormally without being charged, it is possible to prevent normal printed matter from being output without charge. Accordingly, it is possible to avoid the disadvantage of the copying service provider by the copying charging system 5. Further, it is not necessary to remove the jammed recording paper, and the copying machine 10 can be quickly restored.

  Further, as the above-described abnormal processing, when processing for printing out an abnormal image such as warnings or advertisements prepared in advance by the manufacturer or service provider of the copying machine 10 is performed, output without charge Warnings and advertisements can be given to users using the printed materials.

  Further, when the process processing is performed by changing the processing conditions of the image forming process as the abnormal processing described above, a printed matter with an abnormal image is output. For example, if the transfer bias is turned off at the time of the secondary transfer as described above, it becomes possible to output a blank sheet or a white print.

  In addition, when the fixing device 70 performs a fixing process for generating wrinkles on the recording paper P as the above-described abnormal processing, a printed matter in an abnormal state with wrinkles is output.

  Further, as an abnormal process described above, when an abnormal processing process is performed on the recording paper P by the processing device 44, a printed matter in an abnormal state is output. For example, it is possible to output a printed material that has been cut as described above, or has been processed abnormally by drawing marking or graffiti.

  The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration is not limited to that shown in the embodiment, and there are changes and additions within the scope of the present invention. Are also included in the present invention.

  For example, in the embodiment, the content change of the image data in the abnormal processing has been described in the case of replacing the normal image data with the abnormal image data. However, the abnormal image data may be combined with the normal image data. Alternatively, it may be performed by combining other image data. Alternatively, the image processing unit 19 may perform abnormal image processing on normal image data.

  Also, the abnormal image data and other image data used for the above replacement and composition are read from the hard disk device 16 when the copier 10 is started up, stored in the nonvolatile memory 15, and read from the nonvolatile memory 15 when used. Also good. Moreover, you may make it use what was previously memorize | stored in the non-volatile memory 15. FIG.

  Further, the abnormal process in the image forming process is not limited to the process of turning off the secondary transfer bias described in the embodiment. At least one process (process) of charging, latent image formation, development, and transfer in the image forming process may be performed by changing the control parameter. For example, the charging bias may be turned off, the laser beam emission control may be stopped, the development AC bias may be turned off, or the primary transfer bias may be turned off.

  Further, the gate 72 of the fixing device 70 is not limited to the configuration described in the embodiment. For example, if the recording paper P is transported in a substantially horizontal direction with the transfer surface of the toner image facing up and sent to a pair of fixing rollers arranged vertically opposite to each other to perform fixing processing, the upper side is crowned. The lower side is a reverse crown roller, and the guide plate that contacts and guides the lower surface of the recording paper P is displaced (tilted) in the vertical direction to change the guide position of the recording paper P up and down. May be.

  In addition to a coin vendor that inserts money (coins) and bills, the charging apparatus 100 is a card vendor that inserts a prepaid card and performs charging, or the number of printed sheets (single-sided / double-sided printed sheets and color / A counter device such as a sheet counter that counts the number of monochrome prints or a charge counter that counts the printing fee may be used.

  The printer unit 40 in the copying machine 10 may be another type of printer such as an LED printer that scans and exposes a photosensitive drum with an LED (Light Emitting Diode) instead of a laser beam. Further, the image forming process is not limited to the electrophotographic system. A process such as an inkjet method, a thermal transfer method, a laser exposure thermal development transfer method, or the like may be used.

  The present invention is not limited to the full-color copying machine described in the embodiment, and is also applicable to an image forming apparatus such as a monochrome copying machine or a full-color or monochrome multifunction peripheral (MFP; Multi Function Peripheral / Multi Function Printer). Applicable.

1 is a diagram showing a system configuration of an image forming system according to an embodiment of the present invention. 1 is a block diagram showing a schematic configuration of a mechanism system of a copying machine as an image forming apparatus according to an embodiment of the present invention. 1 is a block diagram showing a schematic configuration of a control system of a copying machine as an image forming apparatus according to an embodiment of the present invention. It is a sequence diagram showing a procedure of communication performed between the copying machine and the charging device according to the embodiment of the present invention. It is a figure which shows an example of the image for abnormal times concerning embodiment of this invention. FIG. 3 is a diagram illustrating a schematic configuration of a fixing roller and a gate in the fixing device according to the embodiment of the present invention. FIG. 7 is an explanatory diagram showing a comparison between a case where wrinkles are not generated on a recording sheet and a case where the recording paper is wrinkled in the fixing process by the fixing device of FIG. 6. FIG. 5 is an operation timing chart showing timings of operations of main parts related to an image forming process and paper feed and paper discharge according to an embodiment of the present invention. 5 is a flowchart showing charging processing and abnormal processing at the time of copy printing / output by the copying machine according to the embodiment of the present invention.

Explanation of symbols

5 ... Copy charging system 7 ... Cable 10 ... Copy machine 11 ... CPU
12 ... Bus 13 ... ROM
14 ... RAM
DESCRIPTION OF SYMBOLS 15 ... Nonvolatile memory 16 ... Hard disk device 17 ... Operation display part 18 ... Communication part 19 ... Image processing part 20 ... Automatic document feeder 21 ... Document tray 22 ... Ejection tray 30 ... Scanner part 31 ... Contact glass 32 ... Platen glass 33 ... Light source 34 ... Mirror 35 ... Document illumination unit 36 ... Line image sensor 37 ... Reflection mirror 38 ... Condensing lens 40 ... Printer unit 41 ... Laser unit 42 ... Toner supply device 43 ... Toner collection unit 44 ... Processing device 45 ... Discharge tray 46 ... Paper discharge box 47 ... Opening / closing door 48 ... Locking device 49 ... Recording paper position detector 50 (50Y, 50M, 50C, 50K) ... Imaging unit 51 (51Y, 51M, 51C, 51K) ... Photoconductor drum 52 (52Y) , 52M, 52C, 52K) ... charging device 53 (53Y, 53M) 53C, 53K) ... developing device 54 (54Y, 54M, 54C, 54K) ... static elimination device 55 (55Y, 55M, 55C, 55K) ... cleaning device 60 ... transfer separation device 61 ... intermediate transfer belt 62 ... drive roller 63 ... driven Roller 64 (64Y, 64M, 64C, 64K) ... primary transfer roller 65 ... secondary transfer roller 66 ... cleaning device 70 ... fixing device 70a ... casing 71a, 71b ... fixing roller 72 ... gate 73 ... carry-in path 74 ... guide plate 74a ... guide hole 74b ... support hole 74c ... stopper part 75 ... support shaft 76 ... solenoid 76a ... solenoid body 76b ... movable iron core 77 ... compression coil spring 78 ... stopper pin 80a ... first-stage sheet feeder 80b ... second-stage feed Paper device 80c ... Third stage paper feeder 80d ... Fourth stage paper feeder 80e ... Hand Paper feed device 81 (81a to 81d) ... Paper feed tray 81e ... Manual feed tray 82 (82a to 82d) ... Pickup roller 83 (83a to 83d) ... Feed roller 84 (84a to 84d) ... Retard roller 85 ... Conveyance roller 90 ... Conveying device 90a ... Reversing unit 90b ... Both sides 91 (91a to 91i) ... Conveying roller 92 ... Timing roller 93 ... Discharging roller 94 ... Discharging roller 95 ... Discharging switching guide 97 ... Reversing switching guide 96 ... Passing member 98 ... Reversing roller 99 ... Path member 100 ... Billing device L ... Reflected light N ... Document P ... Recording paper S ... Reading position TY, TM, TC, TK ... Primary transfer position T2 ... Secondary transfer position

Claims (7)

An image reading unit for reading a document image and acquiring image data;
An image forming unit that feeds and conveys recording paper and performs an image forming output process for forming and outputting an image based on the image data acquired by the image reading unit on the recording paper;
A communication unit that communicates with the billing device;
When communication with the charging apparatus by the communication unit is normally performed, the image forming unit normally performs the image forming output process, and a charging signal for the output recording paper is transmitted to the communication unit. When the communication unit communicates with the charging device after the start of paper feeding by the image forming unit, the image formation is performed on the fed recording paper. A control unit that causes the image forming output process to be performed abnormally and output the image,
An image forming apparatus comprising: The image forming unit includes a detection unit that detects a position of the fed recording paper,
The image forming apparatus according to claim 1, wherein the control unit changes the content of the abnormal image formation output process according to the position of the recording sheet detected by the detection unit. The control unit changes the content of the image data when the abnormality occurs, and outputs an image based on the changed image data to the image forming unit as the abnormal image formation output process. The image forming apparatus according to claim 1, wherein the forming process is performed. The image forming unit includes:
A photoreceptor,
A charging unit for charging the photoreceptor;
A latent image forming unit that forms a latent image by irradiating the photosensitive member charged by the charging unit with light whose emission is controlled based on image data;
A developing unit that develops a latent image formed on the photosensitive member by the latent image forming unit to form a developed image;
A transfer unit that transfers the developed image formed on the photoreceptor by the developing unit to the recording paper;
With
The normal image formation output process includes:
A charging process in which the charging unit performs the charging under predetermined processing conditions;
A latent image forming process in which the latent image forming unit forms the latent image under predetermined processing conditions;
A developing process in which the developing unit forms the developed image under predetermined processing conditions;
A transfer process in which the transfer unit performs the transfer under predetermined processing conditions;
Including
When the abnormality occurs, the control unit changes the predetermined processing condition of at least one of the charging process, the latent image forming process, the developing process, and the transfer process. The at least one process in which the predetermined processing condition is changed is processed under the changed processing condition as the abnormal image formation output process in the image forming unit. The image forming apparatus according to any one of the above. The image forming unit includes:
A roller that presses and rotates against the recording paper and fixes the image while conveying the recording paper;
A guide unit capable of guiding the recording paper to the roller and changing the guide position;
With
The normal image formation output process includes a fixing process in which the roller fixes the recording sheet guided to a position where the guide unit is not wrinkled by the conveyance by the roller.
The control unit changes the guide position by the guide unit when the abnormality occurs, and the guide unit generates wrinkles due to conveyance by the roller as the abnormal image formation output process to the image forming unit. 5. The image forming apparatus according to claim 1, wherein the roller performs a fixing process in which the fixing is performed on the recording sheet guided to the position to be performed. The image forming unit includes:
A processing unit that switches between processing that adds abnormal processing to the recording paper and non-processing that does not add abnormal processing,
The normal image formation output processing includes the non-processing processing performed by the processing unit,
The control unit switches processing performed by the processing unit to the processing processing when the abnormality occurs, and causes the image forming unit to perform the processing processing as the abnormal image formation output processing. The image forming apparatus according to any one of claims 1 to 5. The image forming unit includes:
A first discharge unit from which the output recording paper can be taken out by a user of the image forming apparatus;
A second discharge unit in which the output recording paper cannot be taken out by a user of the image forming apparatus;
A switching unit capable of switching the output destination of the recording paper to the first discharge unit or the second discharge unit;
With
The normal image forming output process includes a process in which the image forming unit outputs the recording paper to the first discharge unit by the switching unit,
The control unit switches the output destination by the switching unit when the abnormality occurs, and causes the switching unit to output the recording paper to the first discharge unit as the abnormal image formation output processing to the image forming unit. The image forming apparatus according to claim 1, wherein an output process is performed on the image forming apparatus.

Images