JP2006027056A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To readily remove a cut recording medium without dropping off a conveyance path by allowing the recording medium having a damaged tip portion not to remain in the case where the recording medium is rewound in a magazine to be reused when jamming has occurred in the conveyance path in an image forming apparatus. <P>SOLUTION: In the case where a drawn length of a tip portion of a recording medium 34 is greater than a minimum conveyance amount when a jamming detection means detects occurrence of jamming, a control section 17 controls to perform a cutting operation for cutting the tip portion of the recording medium 34 by means of cutters 35, 36 without drawing the recording medium more. In the case where the drawn length of the tip portion is smaller than the minimum conveyance amount, the control section 17 controls to perform the cutting operation of cutting the tip portion of the recording medium 34 by means of the cutters 35, 36 by drawing the tip portion by an amount greater than the minimum conveyance amount and to perform a rewinding operation for drawing the tip portion of the recording medium 34 back to the magazine 20a after cutting. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention includes a laser exposure unit for forming a latent image by scanning exposure while modulating a laser beam on a photosensitive material, and performs temperature adjustment to stabilize the exposure performance of the laser exposure unit. The present invention relates to an image forming apparatus configured as described above.

  In general, in an image forming apparatus, a photosensitive material such as photographic paper is scanned and exposed to a laser beam modulated in accordance with image information from a laser exposure unit, and then color development, bleach-fixing, water washing, There is what is called a digital minilab in which an image is formed on a photosensitive material by performing each drying process.

  Some of such image forming apparatuses use roll paper obtained by winding a long photographic paper in a roll shape as a photosensitive material. In such an image forming apparatus using roll paper, the roll paper is pulled out and transported along the transport path, and is cut into a photosensitive material of a specified size from the leading edge of the roll paper by a cutter provided in the transport path. The cut photosensitive material is exposed to light to form a latent image. The photosensitive material on which the latent image is formed is subjected to color development, bleach-fixing, water washing, and drying to form an image, which is then discharged. .

  Conventionally, in such an image forming apparatus using roll paper, when a jam occurs in the conveyance path during pulling out of the roll paper (occurrence of conveyance failure), the leading edge of the roll paper after passing through the cutter Means have been proposed for performing different jam handling operations corresponding to the positions.

  In this conventional means for performing a jam processing operation corresponding to the position of the leading edge of the roll paper after passing through the cutter, the cutter is not operated when the detecting means on the conveyance path does not detect the leading edge of the roll paper. To rewind the roll paper. In this case, the position of the leading edge of the roll paper is between the cutter and the designated minimum length, and the roll paper is not contaminated. Therefore, the roll paper is collected and used again.

  Further, in this means, when a jam occurs in the conveyance path, if the detection means at a predetermined position on the conveyance path detects the leading edge of the roll paper, the cutter is operated to cut the roll paper. In this case, since the roll-out portion of the roll paper has reached the minimum size length and has become dirty due to the processing for image formation, it cannot be reused. The cut photosensitive material formed by cutting the paper is discarded (for example, see Patent Document 1).

  However, with the means for performing a different jam processing operation corresponding to the position of the leading edge of the roll paper after passing through the conventional cutter as described above, the roll paper is rewound as it is when it is not dirty due to image forming processing. Will be reused. In this case, when the leading edge of the roll paper that has been pulled out is transported on the transport path, a jam occurs in the transport path, and the roll paper collides with the photosensitive material cut by the cutter that should have been transported in advance. Thus, there is a possibility that the leading end of the drawn roll paper is damaged (damaged) such as deformation.

  In this way, when the roll paper damaged at the tip is rewound and reused as it is, the image forming process is performed over the damaged part such as deformation, and there is an incomplete and no commercial value. Or jamming may occur during conveyance along the conveyance path due to damage to the leading edge of the roll paper.

Accordingly, in the case of using means for performing different jam processing operations corresponding to the position of the leading edge of the roll paper after passing through the above-mentioned cutter, the roll paper is rewound even when it is not soiled due to image forming processing. Instead of the operation, it is conceivable to stop the conveyance of the roll paper on the spot and cut it with a cutter. When processing in this way, the length of the cut photosensitive material made by cutting the roll paper cannot be controlled, so the length of the cut photosensitive material made by cutting the roll paper in the conveyance direction is not possible. Is shorter than the interval between a plurality of conveyance roller pairs arranged side by side to form a conveyance path, a short cut photosensitive material is simultaneously separated from the conveyance roller pairs arranged adjacent to each other. There is a problem in that removal of the short cut photosensitive material becomes difficult due to falling off from the conveyance path.
JP 2003-50490 A

  In view of the above-described problems, the present invention is effective when a long sheet-shaped recording medium wound in a roll shape is pulled out and a jam occurs in the conveyance path during conveyance. Cut and removed the leading edge of the recording medium that has been drawn out so that no damaged part remains at the leading edge of the medium. It is an object of the present invention to newly provide an image forming apparatus in which the recording medium can be easily removed without falling off the conveyance path.

  According to a first aspect of the present invention, there is provided an image forming apparatus including a magazine that stores a long sheet-like recording medium wound in a roll shape, and each of the processing units for image formation from the magazine. A disposed conveyance path, a cutter that cuts the recording medium drawn on the conveyance path into a specified size, and a jam detection means that is installed to detect the occurrence of a jam on the conveyance path that conveys the recording medium; When the occurrence of a jam is detected by the jam detecting means, the amount of the leading end of the long sheet-like recording medium pulled out from the magazine is compared with the amount of the shortest feed length, and the leading end of the recording medium is compared. When the pull-out length is longer than the shortest feed length, at least the cutting end of the recording medium is cut with a cutter without further pulling, and the pull-out length of the recording medium is the shortest feed length. Less than And a control unit that executes a process of drawing the leading end of the recording medium beyond the minimum feed length and then cutting with a cutter, and a rewind process for pulling the leading end of the recording medium after cutting with the cutter into the magazine. It is characterized by that.

  According to a second aspect of the present invention, in the image forming apparatus according to the first aspect, recording is performed when the control unit determines that the leading length of the recording medium is longer than the shortest feed length. It is characterized in that the drawing of the front end of the medium is stopped and the processing for cutting with a cutter is performed.

  By configuring as described above, when a jam occurs on the conveyance path, the length of the long sheet-shaped recording medium leading end pulled out from the magazine is set to be equal to or greater than the shortest feed length. Cut the recording medium with a cutter. At this time, since the recording medium cut by the cutter and remaining on the transport path has a length equal to or longer than the shortest feed length in the transport direction, the recording medium remains on the transport path without dropping off from the transport path. . Therefore, in order to eliminate jamming, when the cut photosensitive material remaining on the transport path is taken out, the photosensitive material cut on the transport path can be easily found and removed without difficulty. Also, when the leading length of the recording medium tip is longer than the shortest feed length, at least the leading edge of the recording medium is cut with a cutter without further pulling, so that further jamming occurs on the transport path. It is possible to prevent the recording medium from being pulled out and cut for a long time, and to prevent unnecessary damage to the recording medium. Further, since the leading edge of the recording medium once pulled out onto the conveying path and rewinded into the magazine is always cut with a cutter, the portion that may have been damaged is next cut from the magazine. When the recording medium is pulled out and reused, it is possible to use a recording medium in which the tip portion is not damaged.

  According to the image forming apparatus of the present invention, when a jam occurs in the conveyance path while a long sheet-shaped recording medium wound in a roll is pulled out and conveyed, the leading end of the drawn recording medium is removed. The recording medium can be rewound and reused after being cut and removed so that the damaged portion does not remain at the tip of the recording medium. Further, there is an effect that the cut recording medium, which is formed by cutting the long sheet-like recording medium in this way, can be easily removed without falling off the conveyance path.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments relating to an image forming apparatus of the present invention will be described with reference to FIGS. The image forming apparatus (printer processor) according to this embodiment is configured as an output machine 10 for a so-called digital laboratory system.

  This digital laboratory system is configured by a combination of an input device 15 having an image input device 11 and an image processing device 13, and an output device 10 having a laser printer unit 12 and a processor unit 14.

  The image input device 11 in the input device 15 is for photoelectrically reading projection light of a film image recorded on a photographic film such as a negative film or a reversal film using an image sensor such as a CCD image sensor. The film images of photographic films of various sizes are to be read. The image input device 11 generates image data by photoelectrically reading projection light of an image recorded on a photographic film to be read by a CCD image sensor or the like, or an image recorded on a recording medium such as a memory card. Image data is acquired by reading data or receiving it from another information processing device via a communication line. This image data is sent from the image input device 11 to the image processing device 13.

  The image processing device 13 performs image processing such as color balance correction and density correction on the input image data to generate recording image data, and outputs the recording image data to the laser printer unit 12 of the output device 10.

  The laser printer unit 12 in the output machine 10 includes a laser light source that oscillates R (red), G (green), and B (blue) laser beams, and an image for recording input from an image processing unit of the input machine. A latent image is formed on the photographic paper by irradiating the photographic paper with a laser beam modulated in accordance with data and performing scanning exposure.

  The processor unit 14 in the output machine 10 performs liquid color development, bleach-fixing, and water washing on the photographic paper on which the latent image is formed by the laser printer unit 12, and then performs a drying process to reveal the image. Get the finished photographic paper.

  As shown in FIGS. 1 and 2, the laser printer unit 12 in the output machine 10 conveys the cut recording paper that has been drawn onto the conveyance path 16 and cut to a predetermined length by conveying the cut recording paper on the conveyance path 16. Image recording or the like is performed with a laser beam (recording light) that is intensity-modulated based on image data while being sequentially transported through the processing units for formation. On the conveyance path 16 of the laser printer unit 12, a cutter conveyance unit 21, a back printing unit 22, and a resist, which are processing units for image formation, are sequentially arranged from the upstream side in the conveyance direction following the paper supply unit 20. The unit 24, the image recording unit 26, the sub-scan receiving unit 28, the sorting unit 30, and the carry-out unit 32 are arranged. For conveying a photosensitive recording paper 34 that is a long sheet-like recording medium (photosensitive material, photographic paper, etc.) wound in a roll shape or a cut recording paper (cut recording medium) obtained by cutting the photosensitive recording paper 34 to a predetermined size In each part along the conveyance path 16, a conveyance roller pair 19 including a driving roller and a nip roller is provided.

  As shown in FIG. 1, each device constituting the output machine 10 is connected to a control unit 17 via a wiring (not shown), and the operation of the entire output machine 10 is controlled by the control unit (CPU) 17. .

  As shown in FIGS. 1 and 2, the paper supply unit 20 disposed in the laser printer unit 12 of the output machine 10 has a long photosensitive recording wound in a roll shape with the recording surface outside. The first magazine 20a and the second magazine 20b in which the paper 34 is housed in a light-shielding housing are set. In each of the first and second magazines 20a and 20b, a pair of drawing rollers 23a and 23b for pulling out the photosensitive recording paper 34 onto the transport path 16 and transporting it toward the back print unit 22, and photosensitive recording Actuator sensors 31a and 31b configured to mechanically detect the paper 34 are provided.

  In the cutter transport unit 21, the drawing roller pair 23a for the first magazine 20a is driven by a pulse motor for the first magazine (not shown), and the drawing roller pair 23b for the second magazine 20b is for the second magazine (not shown). It is configured to be driven by a pulse motor.

  The cutter transport unit 21 has a predetermined length away from the outlet of the first and second magazines 20a and 20b on the transport path 16 of each of the first and second magazines 20a and 20b. Cutters 35 and 36 such as a rotary cutter are disposed to cut the photosensitive recording paper 34 into a specified size. Each of the cutters 35 and 36 is driven in response to a control signal from the control unit 17, and cuts the photosensitive recording paper 34 sent out by a predetermined length according to the print size to form a cut recording paper. Print sizes include L (89X127), panorama (89X254), 2L (127x178), 8 cuts (165x216), 6 cuts (203x254), 4 cuts (254x305), etc. In the present embodiment, for example, cut recording sheets whose widths in the direction orthogonal to the transport direction are 89, 95, 102, 117, 120, 127, 130, 152, 165, 178, 203, 210, 216, 254, 305 Corresponding to The unit is mm.

  In the cutter transport unit 21, light projecting / receiving sensors 33 a and 33 B are arranged at the upstream proximity position of the cutter 35 and the upstream proximity position of the cutter 36, respectively. Further, an actuator sensor 37 is disposed at a position close to the downstream side of the cutter 35. A light projecting / receiving sensor 39 is disposed at a position adjacent to the downstream side of the cutter 36.

  These light projecting / receiving sensors 33a, 33B, 39 can be constituted by, for example, an optical sensor composed of a light emitting diode and a photodiode. Since the output of these light projecting / receiving sensors 33a, 33B, 39 changes only while the cut recording paper passes between the light emitting diode and the photodiode, respectively, these light projecting / receiving sensors 33a, 33B, 39 are used. Thus, the passage of the front end or the rear end of the cut recording paper can be detected. In the laser printer unit 12, other light projecting / receiving sensors described later are similarly configured using light emitting diodes and photodiodes.

  The back print unit 22 records print information such as a photograph date, print date, frame number, and various IDs on a non-recording surface (a surface opposite to the exposure surface) of cut recording paper; An actuator sensor 41 for detecting the photosensitive recording paper 34 is provided. As the back print head 38, a known print head such as a dot impact head, an ink jet head, or a thermal transfer print head can be used as long as it is resistant to a wet development process to be performed later.

  The registration unit 24 is disposed after the registration roller pair 40 and the registration roller pair 40 for adjusting the inclination and the position in the width direction of the cut recording paper in order to prevent the exposure position / angle deviation in the image recording unit 26. And a plurality of conveying roller pairs 19 and a light projecting / receiving sensor 47 for detecting the photosensitive recording paper 34. As a method of adjusting the tilt and the width direction position by the resist roller pair 40, known methods such as a tilt resist, a top resist, and a side resist can be used.

  The image recording unit 26 includes an exposure unit 42, a sub-scanning unit 43 including sub-scanning roller pairs 44 and 46, and light projecting / receiving sensors 51 and 53 that detect the passage of cut recording paper. Operation controlled.

  The exposure unit 42 is connected to the image processing apparatus 13, and when the light projecting / receiving sensor 53 detects that the leading edge of the cut recording paper has passed, each of the red, green, and blue light whose intensity is modulated based on the image data. The beam LB is scanned in the main scanning direction (direction orthogonal to the transport direction) to record an image on cut recording paper.

  The sub-scanning unit 43 is integrally disposed adjacent to the lower part of the exposure unit 42. The sub-scanning roller pairs 44 and 46 of the sub-scanning unit 43 are arranged on the upstream side and the downstream side in the transport direction so as to sandwich the exposure light irradiation position (exposure position) by the light beam LB, and the cut recording paper is irradiated with the exposure light. Transport in the sub-scanning direction (direction parallel to the transport direction) at a predetermined speed with respect to the position. Note that the nip rollers of the pair of sub-scanning rollers 44 and 46 are configured to be capable of switching operation to move between a position where the cut recording paper is sandwiched and a position where the cut recording paper is separated from the cut recording paper. Switching operation is performed when the leading edge or trailing edge of the cut recording sheet is detected. This prevents the cut recording paper from being excessively impacted when the leading edge of the cut recording paper hits the downstream side sub-scanning roller pair 46 or when the trailing edge comes out of the upstream side sub-scanning roller pair 44. .

  As shown in FIGS. 1 and 2, the sub-scan receiving unit 28 includes a plurality of conveyance roller pairs 19 that hold the leading ends of cut recording sheets that are fed from the image recording unit 26 during image recording. The cut recording paper is sent to the downstream side at the same speed as the conveyance speed by the unit 26. Each conveying roller pair 19 of the sub-scanning receiving unit 28 includes a driving roller and a nip roller that can release the nip, and holds the cut recording paper after the leading edge of the cut recording paper during image recording has passed. This prevents the conveyance speed from fluctuating due to the leading edge of the cut recording paper hitting.

  The distribution unit 30 distributes the cut recording paper conveyed in a single row into two rows in the main scanning direction while conveying the cut recording paper at a predetermined first speed. Further, the carry-out unit 32 sends the cut recording paper sent from the sorting unit 30 to the processor unit 14 while being conveyed at a second speed corresponding to the processing speed of the processor unit 14. The sorting unit 30 and the carry-out unit 32 are respectively provided with a light projecting / receiving sensor 55 and a light projecting / receiving sensor 57 for detecting the presence / absence of cut recording paper.

  The processor unit 14 in the output machine 10 includes a development processing unit 60, a drying processing unit 61, a swing back unit 62, and a sorter 63. The development processing unit 60 includes a developing tank 70, a bleach-fixing tank 71, a first water washing tank 73, a second water washing tank 74, a third water washing tank 75, and a fourth water washing in order from the upstream side in the conveyance direction in the conveyance path 16. A washing tank 72 comprising a tank 76 is provided. A predetermined amount of developer is stored in the developing tank 70, a bleach-fixing liquid is stored in the bleach-fixing tank 71, and a predetermined amount of cleaning water is stored in the first water-washing tank 73 to the fourth water-washing tank 76, respectively. However, the developing tank 70, the bleach-fixing tank 71, and the first rinsing tank 73 to the fourth rinsing tank 76 receive the driving force of the conveyance racks, respectively, and convey the inside of the processing tanks 70 to 72, thereby developing.・ Fixing and cleaning processes are performed.

  The drying process part 61 is arrange | positioned above each process tank 70-72, and is comprised from the conveyance belt and the ventilation duct. The blower duct blows dry air heated by a heater toward the conveyance belt, and presses the cut recording paper against the conveyance belt. In this state, the cleaning water adhering to the cut recording paper is removed by passing over the air duct.

  The cut recording paper that has passed through the drying processing unit 61 is sent toward the returning unit 62. In the returning unit 62, the cut recording paper conveyed in two rows is returned to a single row. The sorter 63 collectively outputs and stores a plurality of cut recording sheets sent from the returning unit 62 for each print job.

  Next, the operation when the output machine 10 configured as described above performs a process of normally forming an image without causing jamming (non-transportable state) during transport to create a printed photograph will be described. In the output device 10, the control unit 17 instructed to print the photosensitive recording paper 34 from each of the first and second magazines 20a and 20b loaded in the supply unit 20 according to the instructed print size. Then, the cutters 35 and 36 respectively corresponding to the first and second magazines 20a and 20b are driven to form cut recording paper. The cut recording sheet is sent to the back printing unit 22 to record various information, and then the skew and the width direction position are adjusted in the registration unit 24. The cut recording paper that has passed through the registration unit 24 is sent to the image recording unit 26, and the latent image is scanned and exposed by the light beam LB modulated based on the image data from the image processing device 13.

  After recording the latent image, the cut recording sheet passes through the sub-scan receiving unit 28 and is sent to the distribution unit 30. The sorting unit 30 transports the cut recording paper larger than a predetermined size toward the carry-out unit 32 in a single row without sorting. On the other hand, in the case of cut recording paper smaller than a predetermined size, the cut recording paper is conveyed in two rows.

  The cut recording paper sent to the carry-out section 32 is sequentially conveyed in a constant conveyance direction by the conveyance roller pair 19 capable of releasing the nip, the leading edge of the cut recording paper is detected by the light emitting / receiving sensor 57, and the cut recording paper is After the time to reach the speed control roller pair has elapsed, the transport speed of the speed control roller pair is decelerated, and the slack of the cut recording paper due to the deceleration is absorbed. The speed is changed according to the processing capacity of the processor unit 14.

  As shown in FIG. 1, the processor unit 14 performs processing such as development and fixing on the cut recording paper on which the latent image is recorded to form a printed photograph, and then the cut recording paper dried by the drying processing unit 61 is processed. Send to the return unit 62. When the cut recording paper is distributed into two rows, the back recording unit 62 returns the cut recording paper to a single row, and the sorter outputs a plurality of cut recording papers for each print job and outputs them to the tray 63. To do.

  Next, a description will be given of coping means when jamming occurs when the cut recording paper is conveyed on the conveying path 16 in the laser printer unit 12 configured as described above. The coping means when jamming occurs during conveyance of the cut recording paper is configured to control the coping operation when jamming occurs by the control unit (CPU) 17 that controls the operation of the entire output device 10. For this reason, as shown in the block diagram of FIG. 3, the controller 17 is connected to a device that performs a coping operation when jamming occurs via a bus 100 for transmitting data, command signals, and the like.

  For this reason, the first magazine pulse motor 104 for driving the pull-out roller pair 23a for the first magazine 20a is connected to the bus 100 via the pulse motor driver 102, and further via the pulse motor driver 108. The second magazine pulse motor 106 for driving the drawing roller pair 23b for the second magazine 20b is connected.

  Also, the bus 100 includes a cutter 35 for the first magazine, a cutter 36 for the second magazine 20b, an error display device 110 that informs that jamming has occurred, and a pair of transport rollers 19 in the back printing unit 22. A back print transport motor 112 for driving, an actuator sensor 41 as a back print section sensor, a resist transport motor 114 for driving the transport roller pair 19 in the resist section 24, and a resist transport section detection sensor. A light projecting / receiving sensor 47, a sub-scanning conveyance motor 116 for driving the sub-scanning roller pair 44, 46 in the image recording unit 26, a light projecting / receiving sensor 51 and a light projecting / receiving sensor 53 as sub-scanning unit detection sensors Scan receiving / conveying motor 118, sorting / conveying motor 120, light projecting / receiving sensor 55 serving as a detecting sensor for the sorting unit, carry-out motor 122, Connecting the light emitting and receiving sensor 57 is a detection sensor section.

  The pulse motor 104 for the first magazine and the pulse motor 106 for the second magazine installed in the laser printer unit 12 respectively correspond to the first magazine 20a corresponding to the leading end portion of the photosensitive recording paper 34 once pulled out. Alternatively, an operation of pulling back into the second magazine 20b is possible.

  Further, in the laser printer unit 12, an actuator sensor 41 that is a sensor for a back printing unit, a light projecting / receiving sensor 47 that is a detection sensor for a resist conveyance unit, a light projecting / receiving sensor 51 and a light projecting / receiving sensor that are detection sensors for a sub-scanning unit. 53, a light projecting / receiving sensor 55 serving as a sorting unit detection sensor, and a light projecting / receiving sensor 57 serving as a carry-out unit detection sensor are used to cause jamming at a location (area) on the conveyance path 16. It is configured so that it can be detected. For example, as a jam detection means for detecting the occurrence of jamming, when a cut recording paper that should be conveyed on the conveyance path 16 is not detected by any sensor at a predetermined time, the sensor that has not been detected is detected. And jam detecting means for detecting that jamming has occurred at a position between the detected sensor immediately before the upstream side in the transport direction on the transport path 16 (jam occurrence position).

  In the control system to cope with the occurrence of jamming shown in FIG. 3, the jam processing control shown in the flowchart of FIG. 4 is performed.

  In this jam processing control, in step 200, a jamming occurs at any position on the conveyance path 16 by means of waiting until the jam occurs and detecting the occurrence of jamming using each sensor arranged in the laser printer unit 12. Is detected, the process proceeds to the next step 202.

  In step 202, the control unit 17 drives and controls the pulse motor 104 for the first magazine or the pulse motor 106 for the second magazine, and pulls out the leading end portion of the photosensitive recording paper 34 onto the conveyance path 16. The pull-out amount of the photosensitive recording paper 34 at the time of occurrence is detected. Further, in step 202, the drawing length amount of the photosensitive recording paper 34 at the time of occurrence of jamming is compared with the shortest feed length amount, and the drawing length amount of the photosensitive recording paper 34 at the time of occurrence of jamming is more. If it is determined that it is longer than the shortest feed length, the process proceeds to step 204.

  Further, it was determined that the length of the photosensitive recording paper 34 withdrawn when jamming occurred was shorter than the shortest feed length (the length of the photosensitive recording paper 34 withdrawn was less than the shortest feed length). If yes, go to Step 206.

  Here, the shortest feed length amount is the length along the carrying direction of the cut recording paper that can be fed at the shortest interval among the adjacent intervals in each pair of carrying rollers 19 arranged side by side on the carrying path 16. Shall be said. In the laser printer unit 12, the shortest feed length is 82.5 mm.

  In step 206, the control unit 17 drives the pulse motor 104 for the first magazine or the pulse motor 106 for the second magazine so that the leading end portion of the photosensitive recording paper 34 pulled out at the time of jamming is moved to the shortest feed length. A process of carrying out to a predetermined amount is performed, and the process proceeds to step 204.

  In this step 204, the leading end portion of the photosensitive recording paper 34 pulled out from the first magazine 20a or the second magazine 20b is pulled out beyond the shortest feed length amount, and any of the transport roller pairs on the transport path 16 is pulled. 19, the sheet is held so as to be able to be transported. Therefore, the upstream side in the transport direction (the detected jamming occurrence position) than the jamming occurrence position where the photosensitive recording paper 34 has been pulled out so as not to make extra waste paper. Then, a conveyance stop process for immediately stopping the motor that drives the conveyance roller pair 19 on the sheet supply unit 20 side is performed, and the process proceeds to the next step 208.

  In this conveyance stop process, the leading end portion of the photosensitive recording paper 34 drawn out from the first magazine 20a or the second magazine 20b to the minimum feed length (here 82.5 mm) or more is used as the minimum feed length. It may be controlled to perform a conveyance stop process for stopping all the motors that drive the conveyance roller pair 19 after performing the control to reversely rotate the motor that drives the conveyance roller pair 19 so as to be rewinded. When controlling in this way, it is possible to minimize the amount of useless photosensitive recording paper 34 to be discarded when jamming occurs.

  In step 208, the leading end portion of the photosensitive recording paper 34 drawn out from the first magazine 20a or the second magazine 20b is cut by the cutter 35 or the cutter 36, and a paper cutting process by the cutter is performed, and the process proceeds to the next step 210. .

  Since the cut recording paper cut by the cutter 35 or the cutter 36 in this way has a length equal to or longer than the shortest feed length amount, it can be reliably held by the transport roller pair 19 arranged along the transport path 16. Since the cut recording paper is short in the transport direction and does not fall between the pair of transport rollers 19 arranged side by side in the transport path 16, it is easy for an operator to remove jamming from the transport path 16 and eliminate jamming. Can be done.

  In this step 210, the photosensitive recording paper 34 separated by the cutter 35 or the cutter 36 is driven by controlling the motor that drives the pull-out roller pair 23a for the first magazine 20a or the pull-out roller pair 23b for the second magazine 20b. The rewinding process is performed in which the leading end portion is pulled back into the corresponding first magazine 20a or second magazine 20b, and the process proceeds to the next step 212. The leading edge of the photosensitive recording paper 34 rewound in the first magazine 20a or the second magazine 20b in this way is always cut by the cutter 35 or the cutter 36. Further, it is possible to reliably prevent damage caused by a collision with another cut recording sheet that has been transported in advance on the transport path 16. That is, it can be ensured that the photosensitive recording paper 34 rewound in the first magazine 20a or the second magazine 20b is not damaged. Further, the leading end portion of the photosensitive recording paper 34 is rewound inside the first magazine 20a or the second magazine 20b and stored in a light-shielded state. Even when the light is opened and the light enters inside, the leading end of the photosensitive recording paper 34 is not exposed.

  In step 212, all the cut recording sheets that are on the downstream side in the transport direction from the detected jamming position on the transport path 16 (on the processor unit 14 side from the detected jamming position) are completely transported into the processor unit 14. The process waits until the remaining paper has been entered, and proceeds to step 214.

  Here, the remaining paper entry processing is performed because the cut recording paper remaining on the downstream side in the transport direction from the jamming occurrence position is not damaged by the generated jamming, so the image forming processing is completed. This is for outputting as a finished product.

  In step 214, a remaining paper entry conveyance stop process is executed to stop the motors that drive all the conveyance roller pairs 19 positioned downstream in the conveyance direction from the jamming occurrence position, and the process proceeds to the next step 216.

  In step 216, the nip release state is established in the back printing unit 22, the registration unit 24, the sub-scanning receiving unit 28, and the sorting unit 30 so that the cut recording paper is brought into a nip state on the conveyance path 16 by the conveyance roller pair 19. The transfer roller pair 19 is moved to the nip state (the state moved to the nip pressure contact position), and the sub-scanning roller pairs 44 and 46 in the image recording unit 26 are moved to the nip release position. Execute, and go to the next step 218. Note that, among the conveying roller pair 19 shown in FIG. 2, the roller rollers described so that the rollers are shifted and overlapped by an imaginary line are configured to be moved to the nip position and the nip release position by being operated by an actuator (not shown) or the like. ing.

  In step 218, the control unit 17 transmits a command signal to the error display device 110 provided in the output machine 10 to notify the user of the occurrence of jamming, and jammed cut recording paper remaining on the conveyance path 16. In order to prompt the user to remove the error, for example, an error display process is performed to display the jam detection position and the number of remaining sheets remaining on the conveyance path 16 in the laser printer unit 12, and this jam processing control. Exit.

  Further, in the laser printer unit 12, in the above-described jam processing control, immediately after detecting the jam occurrence, it is detected whether or not the detected jamming occurrence position is downstream in the transport direction from the sorting unit 30, When the jamming occurrence position is on the downstream side in the transport direction with respect to the sorting unit 30, the motor that drives the transport roller pair 19 of the sorting unit 30 is controlled to stop immediately, and the jamming of the sorting unit 30 by jamming is controlled. You may make it perform control which suppresses damage.

  Note that jamming is performed when the leading end of the photosensitive recording paper 34 is pulled out from the first magazine 20a or the second magazine 20b by the drawing roller pair 23a or the drawing roller pair 23b, or when the photosensitive recording paper 34 is pulled out. If this occurs during the operation of cutting the tip with the cutter 35 or the cutter 36, only the processing from step 212 to step 218 in the jam handling system described above may be performed.

  It should be noted that the present invention is not limited to the above-described embodiment, and can be applied to, for example, a printer processor that directly records an image with projection light from a film.

It is a schematic perspective view which shows the principal part of the output machine for digital lab systems concerning embodiment of this invention. It is an expansion schematic block diagram which shows the structure inside the laser printer part of the output machine for digital laboratory systems concerning embodiment of this invention. It is a block diagram which shows schematic structure of the jam detection means in the laser printer part of the output machine for digital laboratory systems concerning embodiment of this invention. It is a flowchart which shows the flow of control operation | movement of the jam detection means in the laser printer part of the output machine for digital laboratory systems concerning embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Output machine 14 Processor part 16 Conveying path 17 Control part 19 Conveying roller pair 20a 1st magazine 20b 2nd magazine 21 Cutter conveying part 23a Drawer roller pair 23b Drawer roller pair 31a Actuator sensor 33a Light emitting / receiving sensor 34 Photosensitive recording paper 35 Cutter 36 Cutter 37 Actuator sensor 39 Emitter / receiver sensor 41 Actuator sensor 44 Sub-scanning roller pair 46 Sub-scanning roller pair 47 Emitter / receiver sensor 51 Emitter / receiver sensor 53 Emitter / receiver sensor 55 Emitter / receiver sensor 57 Emitter / receiver sensor 110 Error display device

Claims (2)

A magazine containing a long sheet-like recording medium wound in a roll;
From the magazine, a conveyance path arranged so as to sequentially visit each processing unit for image formation,
A cutter for cutting the recording medium drawn on the conveyance path into a specified size;
Jam detecting means detecting means installed for detecting the occurrence of jam on the conveying path for conveying the recording medium;
When the occurrence of a jam is detected by the jam detection means, the length of the long sheet-like recording medium drawn out from the magazine is compared with the amount of the shortest feed length to compare the recording length. When the length of the leading end of the medium is longer than the shortest feed length, at least the process of cutting with the cutter without further pulling the leading end of the recording medium, and the leading length of the leading end of the recording medium When the amount is less than the shortest feed length, pulling the leading end of the recording medium beyond the shortest feed length and then cutting with the cutter; and cutting the leading end of the recording medium with the cutter into the magazine A control unit that executes a rewind process to be pulled back in,
An image forming apparatus comprising:   When the control unit determines that the withdrawal length amount of the recording medium front end portion is longer than the shortest feed length amount, the control unit stops the withdrawal of the recording medium front end portion and performs a process of cutting with the cutter The image forming apparatus according to claim 1.

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