JP2015071260A - Stencil printing equipment, and stencil printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stencil printing equipment, in which the number of printed paper sheets is counted for each image so that the remaining print numbers can be individually adjusted, in a high-speed printing for printing plural sheets is performed by winding a master printed with a plurality images on a plate cylinder and by feeding the sheets of printing paper for one rotation of the plate cylinder.SOLUTION: A stencil printing equipment comprises: paper feed means for feeding paper sheet by sheet by separating the paper; plate-making means capable of making plates by arranging a plurality of made-up images for paper 14 of each stencil to be wound on a plate cylinder 11; printing means for printing the paper 9 fed; and discharge paper transportation means for transporting the printed paper by peeling the same from the plate cylinder 11. The stencil printing equipment has a high-speed printing mode for executing the prints of the sheets 9 during one rotation of the plate cylinder, and further comprises: counting means for counting the number of sheets of the printed paper for each plate-making image in the high-speed printing mode; and display means for displaying the counted number. In accordance with the counted numerical value, the printing number left is adjusted for each of the plate-making images.

Description

  The present invention relates to a stencil printing apparatus and a stencil printing method.

  A master (stencil sheet) made on the basis of image data of an original is wound around the outer periphery of a cylindrical plate cylinder, and the printing paper separated and fed one by one is pressed against the outer periphery of the plate cylinder (printing drum) 2. Description of the Related Art A stencil printing apparatus that performs printing (image formation) by transferring ink that has been pressed by a (press roller) and passed through holes in a stencil sheet to printing paper is known. The conventional stencil printing apparatus feeds and conveys one sheet of printing paper by one rotation of the plate cylinder and forms one printed matter. Therefore, the printing speed is uniformly determined by the rotation speed of the plate cylinder.

On the other hand, there is a high-speed printing (double speed printing) technology that makes a plurality of images side by side on a master plate, feeds a plurality of printing sheets per rotation of the plate cylinder, and enables printing of a plurality of images. It is known (for example, see Patent Documents 1 to 3).
In this high-speed printing (double speed printing) technology, for example, two A4 size original images are made side by side on an A3 size stencil sheet, and two A4 size sheets are continuously fed per rotation of the plate cylinder. And printing. Productivity is improved by printing two sheets of paper with one rotation of the plate cylinder.

  Patent Document 1 discloses a plate cylinder and a plate making unit capable of performing plate making by arranging first and second plate making images corresponding to two originals in the conveyance direction of a master for one plate wound around the plate cylinder. A printing pressure member which is provided so as to be able to come into contact with and separate from the plate cylinder and presses the sheet against an outer peripheral surface of the plate cylinder, and a first printed sheet on which a first plate-making image is printed by being pressed by the printing pressure member And a paper discharge section for discharging the second printed paper on which the second plate-making image is printed, and continuously feeding two sheets of the paper during one rotation of the plate cylinder In the stencil printing apparatus capable of printing, a plurality of paper discharge trays provided in the paper discharge section, a guide means movable to a position for guiding printed paper to the plurality of paper discharge bases, and the guide means A stencil printing apparatus having control means for selectively operating is disclosed. According to the stencil printing apparatus, it is possible to eliminate the trouble of performing automatic sorting and sorting work after printing is completed by selectively discharging discharged printed sheets to two or more discharge trays. It describes what you can do.

  In Patent Document 2, a stencil sheet made by perforation based on image data is wound around the outer peripheral surface of a printing drum, and sheet-like recording media separated and fed one by one are pressed against the outer peripheral surface of the printing drum. In the stencil printing apparatus for forming an image by causing the ink supplied from the inside of the printing drum to ooze out from the perforated portion of the stencil sheet and transfer it to a sheet-like recording medium by continuously pressing the sheet 1 A stencil paper for a stencil is made by stenciling a plurality of images individually in the transport direction, and can execute a multi-sided division printing mode that switches the process of printing each image individually on a sheet-like recording medium. Multi-surface division printing mode setting means for setting a mode, and feeding timing for switching the feeding timing of the sheet-like recording medium with respect to the rotation position of the printing drum When the multi-sided division printing mode is set by the replacement unit, the pressing timing switching unit for switching the pressing timing of the pressing unit with respect to the printing drum, and the multi-sided division printing mode setting unit, the feeding is performed corresponding to each image. A stencil printing apparatus having a control means for controlling a feeding timing switching means and the pressing timing switching means is disclosed. According to the stencil printing apparatus, it is described that the master can be saved without requiring a cutting operation or an optional drum and without significantly increasing the apparatus cost.

  In Patent Document 3, an image reading unit that reads an image of a document, a plate making unit that forms a master by forming a punched image corresponding to the read image of the document on a master base paper, and a paper on which printing paper is placed are disclosed. A paper unit and a printing unit that performs printing on the printing paper fed from the paper feeding unit using the master that has been subjected to plate making. In a stencil printing apparatus that performs plate making in the plate making unit to form two corresponding punched images side by side on a single master, a paper size detecting sensor for detecting the size of the original and a paper for detecting the size of the printing paper The size detection sensor and the magnification ratio of the punched image are automatically adjusted so that the formation area of one punched image corresponding to the image of one original is ½ of the size of the printing paper at the time of two-side continuous photoengraving. Automatic zoom ratio setting And a two-sided continuous plate-making preferential start means for automatically starting two-sided continuous plate making when a predetermined condition is satisfied at the start of the plate-making, and the two-sided continuous plate making preferential start means can be executed A stencil printing apparatus having a mode switching key for switching the mode to a mode is disclosed. According to the stencil printing apparatus, it is described that it is easy to use the function of the two-sided continuous printing plate making, and thereby it is possible to reduce the work time of the printing work and the usage amount of the master paper. ing.

In the conventional stencil printing apparatus, the number of printed sheets is counted as +1 for each printing by a counting means (counter). The counted numerical value is used for managing the cumulative number of printed sheets or displaying the number on the display means or the like.
On the other hand, in a stencil printing apparatus that performs high-speed printing (see, for example, Patent Document 3), two pages are printed at once by winding a master on which two images are made on a plate cylinder. It is described that when using the function of continuous photoengraving, the counting means increases the count of the number of printed sheets by 2 for each rotation of the plate cylinder.

  However, in a stencil printing apparatus that performs high-speed printing (double speed printing), if a plurality of images made on the same master are different images, the number of printed sheets is uniformly added for each rotation of the plate cylinder and counted. However, even if there is a difference between the number of printed sheets corresponding to each image, there is a problem that the number of printed sheets is not adjusted for each image.

  That is, when a paper jam occurs in the middle of one rotation of the plate cylinder, the count value is corrected because the number of normally printed images is different from the number of printed images not printed due to paper jam. Otherwise, after the paper jam is restored, the normally printed image is printed excessively, and the paper is wasted.

  In addition, when a roll-up occurs on a sheet on which one image is printed out of a plurality of sheets continuously fed in high-speed printing (double-speed printing), the sheet conveyance path is not blocked. The sheet on which the image is printed can be discharged. For this reason, even if the printing paper of one image is rolled up, the printed paper of the other image that has been printed normally needs to be discharged and counted as it is, and the number of printed papers Are required to be accurately counted individually for each image.

  Therefore, in view of the above problems, the present invention is a high-speed printing in which a master that has made a plurality of images is wound around a plate cylinder, and a plurality of printing sheets are fed per one rotation of the printing cylinder to perform a plurality of printings. It is an object of the present invention to provide a stencil printing apparatus capable of counting the number of printed sheets for each image and individually adjusting the remaining number of printed sheets.

  In order to solve the above-described problems, a stencil printing apparatus according to the present invention is wound around a cylindrical plate cylinder, and a paper feed unit that separates and feeds the sheets stacked on the paper feed table one by one. A plate making means capable of making a plate by arranging a plurality of plate making images corresponding to a plurality of originals along a rotation direction of the plate cylinder, and a plate to be fed by the pressing means. A printing unit that presses against the stencil sheet on the cylinder and prints the plate-making image; and a paper discharge conveyance unit that peels and conveys the printed paper from the plate cylinder, and the plurality of the plurality of sheets are rotated during one rotation of the plate cylinder A stencil printing apparatus having a high-speed printing mode in which a plurality of sheets corresponding to the plate-making image are sequentially fed and printing is performed on the plurality of sheets, and in the high-speed printing mode, for each plate-making image Counting means for counting the number of printed sheets; A stencil printing apparatus further comprising display means for displaying a numerical value counted by the counting means, and adjusting the remaining number of prints for each plate-making image according to the numerical value counted by the counting means. .

  According to the stencil printing apparatus of the present invention, in a high-speed printing in which a plurality of images are made by winding a master that has made a plurality of images on a plate cylinder, and a plurality of printing sheets are fed per one rotation of the plate cylinder. A stencil printing apparatus capable of counting the number of printed sheets for each image and individually adjusting the remaining number of printed sheets can be provided.

It is sectional drawing which shows an example of schematic structure of the stencil printing apparatus of this embodiment. It is explanatory drawing which shows an example of the master made in high speed printing, and printed paper. It is a flowchart which shows an example of operation | movement of the stencil printing apparatus of this embodiment. It is a block diagram which shows an example of the control structure of the principal part of the stencil printing apparatus of this embodiment. It is explanatory drawing which shows the principal part structure of the printing means of the stencil printing apparatus of this embodiment, a paper conveyance, and a counter display. FIG. 6 is an explanatory diagram illustrating an exemplary arrangement of a sheet detection sensor. It is explanatory drawing which shows an example of the count value displayed on the paper conveyance at the time of high-speed printing in a printing part, and a display means. It is explanatory drawing which shows an example of the count value displayed on the paper conveyance at the time of high-speed printing in a printing part, and a display means. It is explanatory drawing which shows an example of the count value displayed on the paper conveyance at the time of high-speed printing in a printing part, and a display means.

  Hereinafter, a stencil printing apparatus and a stencil printing method according to the present invention will be described with reference to the drawings. It should be noted that the present invention is not limited to the embodiments of the examples shown below, and other embodiments, additions, modifications, deletions, and the like can be changed within a range that can be conceived by those skilled in the art. Any aspect is included in the scope of the present invention as long as the operations and effects of the present invention are exhibited.

  The stencil printing apparatus according to the present invention has a sheet feeding means for separating and feeding sheets stacked on a sheet feeding table one by one, and a stencil sheet for one plate wound around a cylindrical plate cylinder. A plate making means capable of making a plate by arranging a plurality of plate making images corresponding to a plurality of documents along the rotation direction of the plate cylinder, and pressing the fed paper against the stencil sheet on the plate cylinder by a pressing means, A printing unit that prints the plate-making image; and a paper discharge conveyance unit that peels and conveys the printed paper from the plate cylinder, and a plurality of sheets corresponding to the plurality of plate-making images during one rotation of the plate cylinder. A stencil printing apparatus having a high-speed printing mode (double-speed printing mode) in which sheets are sequentially fed and printing is performed on the plurality of sheets.

A cross-sectional view of a schematic configuration of the stencil printing apparatus of the present embodiment is shown in FIG.
As shown in FIG. 1, the stencil printing apparatus 1 includes a printing unit 2, a plate making unit 3, a paper feeding unit 4, a discharge plate unit 5, a paper discharge transport unit 6, a scanner unit 7, and a refeed unit 8. .

Inside the cylindrical plate cylinder 11, an ink roller 13 that supplies ink in contact with the inner peripheral surface of the plate cylinder 11, and an ink roller 13 that is arranged in parallel with a slight gap between the ink roller 13 and the ink roller 13. A doctor roller 15 that forms an ink reservoir 60 having a wedge-shaped cross section and an ink pipe (not shown) that supplies ink to the ink reservoir 60 are disposed therebetween.
The ink in the ink reservoir 60 is supplied as a thin film onto the outer peripheral surface of the ink roller 13 while being measured by the doctor roller 15, and further, the outer peripheral surface of the ink roller 13 contacts the peripheral surface of the cylindrical body of the plate cylinder 11. 11 opening portions.

The printing means 2 disposed almost at the center of the apparatus main body of the stencil printing apparatus 1 has a plate cylinder 11 and a pressing means (press roller) 12.
The plate cylinder 11 is rotatably supported by the apparatus main body and is driven to rotate by a plate cylinder driving means (not shown). The plate cylinder 11 has an openable and closable clamper (not shown) on its outer peripheral surface, and a plate-making stencil sheet (hereinafter also referred to as a “plate-making master”) made by the plate-making means 3 on the outer peripheral surface of the plate cylinder 11. ) 14 is wound.

2A and 2C show examples of the master 14 that is used for high-speed printing.
2A is an example in which an image A (first plate-making image) 21a and an image B (second plate-making image) 21b are formed. In high-speed printing using the master 14 that has been made, two sheets of paper are fed and conveyed by one rotation of the plate cylinder 11, and as shown in FIG. Printed matter and printed matter on which the image B is printed).
On the other hand, as shown in FIG. 2C, the first platemaking image 21a and the second platemaking image 21b may be the same image. In this case, two sheets of paper are fed and conveyed by one rotation of the plate cylinder 11, and two printed sheets 9 on which the same image C is printed are formed as shown in FIG.

  The master-made master 14 is wound on the plate cylinder 11 so that, for example, the first plate-making image 21a corresponds to the leading side in the rotation direction of the plate cylinder 11, and the second plate-making image 21b corresponds to the rear side in the rotation direction of the plate cylinder 11. Is done.

The pressing means (press roller) 12 disposed below the plate cylinder 11 is rotatably supported at both ends by an arm member (not shown), and the arm member is swingably supported by a swing means (not shown). Has been.
The pressing means 12 is positioned either at the pressing position shown in FIG. 1 where the peripheral surface is pressed against the master 14 on the plate cylinder 11 or at the separated position where the peripheral surface is separated from the plate cylinder 11. In the vicinity of the peripheral surface of the pressing means 12, a cleaning roller (not shown) that performs cleaning by contacting the peripheral surface of the pressing means 12 may be provided.

  In the vicinity of the pressing means 12, a refeeding guide member (not shown) is provided for transporting the surface-printed paper 9 sent from the refeeding section 8 along the peripheral surface of the pressing means 12. A re-feeding registration roller 18 is disposed below the pressing means 12 and sends out the paper 9 stored on the auxiliary tray 34 in contact with the peripheral surface of the pressing means 12.

  On the left side of the contact position between the plate cylinder 11 and the pressing means 12, a switching member (not shown) is disposed on the conveyance path of the paper 9, and the paper 9 that has passed between the plate cylinder 11 and the pressing means 12 Depending on the position of the switching member, it is guided to the paper discharge conveying means 6 or the auxiliary tray 34.

A plate making means 3 is disposed on the upper right side of the printing means 2.
The plate making means 3 has a known configuration including a master holding member 23 for holding a master roll obtained by winding a stencil sheet (master) 22 in a roll shape, a platen roller 24, a thermal head 25, a master cutting means 26, a roller pair 29, and the like. It is. While feeding the master 22, the heating element of the thermal head 25 corresponding to the image data is turned on / off to form a punched image on the master 22 and the pre-made master 14 is created.

A sheet feeding means 4 is disposed below the plate making means 3. The paper feed unit 4 includes a paper feed stand (paper feed tray) 48, a paper feed roller 51, and the like.
The stencil printing apparatus 1 of the present embodiment is configured to be able to print a maximum of A3 size printing paper, and various sizes of paper that can be printed on both sides can be loaded on the paper feed tray 48. A paper size detection sensor for detecting the size of the paper is provided on the paper board.

  The plate discharging unit 5 disposed at the upper left of the printing unit 2 in the drawing has a well-known configuration including an upper plate discharging member, a lower plate discharging member, a plate discharging box, a compression plate, and the like. Is peeled off from the outer peripheral surface of the plate and discarded inside the plate removal box.

A paper discharge conveying unit 6 is disposed below the plate discharge unit 5.
The paper discharge transport unit 6 includes a peeling claw 31, a paper discharge transport unit 32, a paper discharge tray (paper discharge tray) 33, a peeling fan (not shown), and the like.
The front end of the peeling claw 31 is provided so as to be close to and away from the outer peripheral surface of the plate cylinder 11 by a swinging means (not shown), and when the close position occupies the sheet 9 from the outer peripheral surface of the plate cylinder 11. Peel off. The paper discharge conveyance unit 32 includes a driving roller, a driven roller, an endless belt, a suction fan, and the like, and conveys the printed sheet 9 on the upper surface of the endless belt in the direction of the arrow in FIG.

  The paper discharge tray 33 has one end fence and a pair of side fences, and the printed sheets 9 are stacked on the upper surface thereof. A peeling fan (not shown) is disposed above the peeling claw 31 and blows air toward the outer peripheral surface of the plate cylinder 11 to finish the surface printing process and peel off from the outer peripheral surface of the plate cylinder 11 by the switching member. The leading edge of the sheet 9 to be peeled and the sheet 9 to be peeled off from the outer peripheral surface of the plate cylinder 11 by the peeling claw 31 after finishing the back surface printing process are raised by air blowing.

A scanner unit 7 is disposed on the upper part of the main body of the stencil printing apparatus 1.
The scanner unit 7 includes, for example, a contact glass, a pressure plate provided so as to be able to contact with and separate from the contact glass, a reflection mirror and a fluorescent lamp that scan and read a document image, a lens that focuses the scanned image, and a focused lens. An image sensor or the like for processing an image is provided, and an ADF unit, which is an automatic document reader, is provided above the image sensor. The ADF unit has a document tray on which a plurality of documents can be placed, and a document sensor that detects the presence or absence of a document is provided on the document tray.

  The stencil printing apparatus 1 according to this embodiment includes a counting unit that counts the number of printed sheets 9 for each of the plurality of plate-making images 21 in the high-speed printing mode. It further comprises display means for displaying the numerical value counted by the counting means. The remaining number of printed sheets is adjusted for each plate-making image 21 according to the numerical value counted by the counting means.

FIG. 5 (A) shows the configuration of the main part of the printing means 2, FIG. 5 (B) shows the conveyance of the paper 9, and FIG. 5 (C) shows an example of counter display for each image.
As shown in FIG. 5A and FIG. 5B, printing is performed by passing the paper 9 between the plate cylinder 11 and the pressing means 12 and pressing it. A conveyance path of the sheet 9 is indicated by a dotted line, and the right side of the drawing with respect to the plate cylinder 11 is a sheet feeding side path and the left side is a sheet discharge side path.
The plate cylinder 11 is wound with a master 14 having a plurality of images 21a and 21b as shown in FIG. 2, and the images 21a and 21b are printed on the printing paper 9a and 9b which are continuously conveyed. Each is printed.

  As shown in FIG. 5C, a counter is provided for each plate-making image 21 (21a, 21b) as counting means, and printed paper 9 (9a, 9b) is provided for each plate-making image 21 (21a, 21b) by the counting means. The image A counter is counted as +1 and the image B counter is counted as +1. The counted value is displayed on the display means.

  In the printing method by the stencil printing apparatus 1 according to the present embodiment, a plurality of sheets 9 corresponding to a plurality of plate-making images 21 are sequentially fed during one rotation of the plate cylinder 11, and printing is performed on the plurality of sheets 9. In the high-speed printing mode, the number of printed sheets 9 is counted for each plate-making image 21, and the counted number is displayed on the display means, and the remaining number of printed sheets is adjusted for each plate-making image 21 according to the counted number. To do.

The flow of the operation of counting the number of printed sheets by the counting means will be described with reference to FIG.
As shown in FIG. 3, first, the print mode is determined (S001). When not in the high-speed printing mode, one printed sheet is formed for each rotation of the plate cylinder 11, and +1 is counted by a single counting means (counter) (S002).
The accumulated value of the counted numbers is displayed on the display means (counter display means). The counted value is used to adjust the remaining number of printed sheets by the control means.

On the other hand, in the case of the high-speed printing mode, it is determined whether the plurality of plate-making images 21 on the same plate-making master 14 are the same image or different images (S003).
For example, as shown in FIG. 2C, when the platemaking images 21a and 21b on the stencil sheet 14 are the same image (image C), for each platemaking image (the first platemaking image 21a and the second platemaking image). In step S004, it is determined whether to count the printed sheets.

When the number of printed sheets is not counted for each plate-making image, the number N of the plate-making images is formed by one rotation of the plate cylinder 11, so + N is counted by a single counting means (counter). (S005).
The accumulated value of the counted numbers is displayed on the display means (counter display means). The counted value is used to adjust the remaining number of printed sheets by the control means.

If it is determined in step S003 that the plurality of plate-making images 21 on the same stencil sheet 14 are different images, that is, as shown in FIG. 2A, the plate-making images 21a and 21b on the stencil sheet 14 are different images. In the case of (Image A and Image B), printed sheets are printed by a plurality of (number of plate-making images) for each plate-making image (individually the first plate-making image 21a and the second plate-making image 21b). Count (S006).
Similarly, when it is determined in step S004 to count for each plate-making image, printed sheets are similarly printed for each of a plurality of (plate-making image) plate-making images (the first plate-making image 21a and the second plate-making image 21b individually). Count (S006).
The accumulated value of the counted numbers is displayed on the display means (counter display means). The counted value is used to adjust the remaining number of printed sheets by the control means.

Examples of the display means include a display unit of an operation panel.
As the operation panel, in addition to the display unit, for example, a means for selecting a print mode, a means for selecting whether or not to count for each plate-making image in step S004, and the remaining number of prints based on the displayed count value Examples include a numeric keypad and various input buttons as means for setting and inputting.

In the stencil printing apparatus 1 of the present embodiment, as shown in FIG. 6, the paper discharge unit detection sensor 16 disposed on the printed paper conveyance path of the paper discharge conveyance means 6 and the printed paper 9 are peeled off. And a plate cylinder part detection sensor 17 disposed on the downstream side in the rotational direction of the plate cylinder 11 with respect to the position of the plate cylinder 11.
The apparatus further includes a determination unit that determines whether printing has been normally performed based on detection results of the paper discharge unit detection sensor 16 and the plate cylinder unit detection sensor 17, and the counting unit performs printing in response to an input from the determination unit. The number of used sheets 9 is counted for each corresponding plate-making image 21.

Next, the control configuration of the stencil printing apparatus 1 of this embodiment will be described with reference to FIG.
The control configuration controls the document reading operation, plate making operation, paper feeding operation, and printing operation of the stencil printing apparatus 1. The main body control device 100 as the control means performs an operation of counting the number of printed sheets 9 for each plate-making image 21 by the counting means and adjusting the remaining number of printed sheets according to the counted value, particularly in the high-speed printing mode. Control. The count value referred to for the adjustment of the remaining number of printed sheets is reflected after the plate cylinder 11 makes one rotation or after the paper 9 is recovered from jamming or non-feeding.

The main body control device 100 includes a CPU (central processing unit), an I / O (input / output) port, a ROM (read only storage device), a battery-equipped RAM (read / write storage device), a timer (not shown), and the like. A microcomputer having a configuration in which they are connected by a signal bus (not shown) is provided. The main body control device 100 receives data signals and ON / OFF signals from the various keys via an input port, a sensor input circuit, and the like.
The operation panel 101 includes means for selecting and inputting a print mode and the number of prints, a display means for displaying a numerical value counted by the counting means, and the like.

  The document data read by the scanner unit (document reading device) 7 is sent to an image processing unit (not shown) and subjected to various image processing. Examples of the image processing include filter processing, scaling processing, binarization processing, and the like. In the plate making means 3, a perforated image corresponding to the obtained image data is formed.

  When the high-speed printing mode is selected, a plurality of images are made by the plate making unit 3, and a plurality of sheets are continuously fed by the sheet feeding unit 4.

  The main body control device 100 further includes the counting unit and a determination unit that determines whether printing has been normally performed based on the detection results of the paper discharge unit detection sensor 16 and the plate cylinder unit detection sensor 17. The determination unit makes a determination in accordance with inputs from the paper discharge unit detection sensor 16 and the plate cylinder unit detection sensor 17, and the counting unit counts the number of printed sheets in accordance with the input from the determination unit.

  Further, the main body control device 100 is electrically connected to the plate cylinder rotation motor 47 and the transport motor 46, respectively. The plate cylinder rotation motor 47 is a motor that rotates the plate cylinder 11, and the transport motor 46 is a motor that rotates to transport the paper 9.

As shown in FIG. 6, the stencil printing apparatus 1 of the present embodiment includes a paper discharge unit detection sensor 16 and a plate cylinder unit detection sensor 17. The paper discharge detection sensor 16 and the plate cylinder detection sensor 17 detect the paper 9 that has passed the detection target area.
When the printed sheet 9 is detected at a predetermined timing by the paper discharge unit detection sensor 16, the determination unit determines that the corresponding plate-making image 21 has been printed normally, and the counting unit counts the number of printed sheets. To do.
Further, when the printed paper 9 is not detected at a predetermined timing by the paper discharge unit detection sensor 16 and is detected at a predetermined timing by the plate cylinder detection sensor 17, the determination unit determines that the printed paper 9 is the plate cylinder. 11 is determined to have been rolled up without peeling, and the counting means does not count as the number of printed sheets.
Further, when the printed paper 9 is not detected at a predetermined timing by either the paper discharge part detection sensor 16 or the plate cylinder part detection sensor 17, the determination unit determines that a paper jam or paper non-feed has occurred, and The counting means does not count as the number of printed sheets.

  Hereinafter, an example of counting of printed sheets in the high-speed printing mode will be described with reference to FIGS.

FIG. 7A shows two sheets 9a sequentially fed corresponding to a plurality of images (image A and image B) on the plate-making master 14 as shown in FIG. 2A in the high-speed printing mode. 9b, the upstream side paper 9b is in a state of being jammed.
In this case, if the printed sheet 9a of the image A is discharged as it is, and it is detected that the paper A has passed through the discharge unit detection sensor 16 at a predetermined timing, the determination means normally only prints the corresponding image A. Determine that it was done.
Based on this determination, as shown in FIG. 7B, the counting means counts the number of printed sheets of image A (+1) and does not count the number of printed sheets of image B (+0). .

FIG. 8A shows two sheets 9a sequentially fed in correspondence with a plurality of images (image A and image B) on the plate-making master 14 as shown in FIG. 2A in the high-speed printing mode. 9b, the downstream side paper 9a is in a state of being jammed.
Since the printed paper 9a does not pass through the paper discharge part detection sensor 16 and the plate cylinder part detection sensor 17 at a predetermined timing and is not detected at all, the determination means is one in which the printed paper 9a is jammed. Is determined. Then, the conveyance of the sheet 9 is stopped.
Based on this determination, as shown in FIG. 8B, the counting means does not count the number of printed sheets of image A (+0), and similarly does not count the number of printed sheets of image B (+0). ).

FIG. 9A shows two sheets 9a fed sequentially corresponding to a plurality of images (image A and image B) on the plate-making master 14 as shown in FIG. 2A in the high-speed printing mode. 9b, the downstream side paper 9a is wound around the plate cylinder 11.
When the printed paper 9a does not pass through the paper discharge unit detection sensor 16 at a predetermined timing and is not detected, and when it has been detected through the plate cylinder unit detection sensor 17 at a predetermined timing, the determination is made. The means determines that the printed paper 9 a has been rolled up without peeling from the plate cylinder 11. In this case, the conveyance path is not blocked and the succeeding sheet 9b fed continuously can be printed. Therefore, the conveyance is continued and the image B is printed. If the printed paper 9b of the image B is discharged as it is and it is detected that the paper B has passed through the paper discharge unit detection sensor 16 at a predetermined timing, the determination means that only the corresponding image B has been printed normally. judge.
Based on this determination, the counting means does not count the number of printed sheets of image A (+0) and counts the number of printed sheets of image B (+1), as shown in FIG. 9B.

  In the state shown in FIG. 9A, in the case of the conventional printing method, the printing operation is stopped when the winding occurs, but in the present embodiment, the conveyance of the sheet 9b is continued, and the printed sheet 9b The printing operation is stopped after the paper is discharged. As a result, the number of printed sheets is accurately reflected without wasting the sheet 9b.

As described above, according to the stencil printing method using the stencil printing apparatus of the present embodiment, the number of printed sheets can be correctly counted for each plate-making image when a paper jam or roll-up occurs. .
Then, after processing such as paper jam (jam) or winding, or after one rotation of the plate cylinder is completed, the counted number of printed sheets is reflected, and the remaining number of printed sheets is set for each plate-making image. Can be adjusted.

The adjustment of the remaining number of prints may be a method in which the control means automatically performs the adjustment according to the numerical value counted by the counting means. The operator confirms the numerical value of the counter of each image displayed on the display means, and the operator prints It may be performed by inputting the number of sheets from an operation panel or the like.
The remaining number of prints is preferably adjusted so that only an image for which the number of prints is insufficient is printed at the end after a series of prints. Immediately after jamming and paper jam recovery, the image with the smaller counter value displayed can be printed to adjust the number of printed images. Therefore, it is efficient to perform printing so that the number of printed sheets is finally aligned.

DESCRIPTION OF SYMBOLS 1 Stencil printing apparatus 2 Printing means 3 Plate making means 4 Paper feeding means 5 Discharge part 6 Discharge conveyance means 7 Scanner part 8 Refeeding part 9 Paper 11 Plate cylinder 12 Press means (press roller)
13 Ink Roller 14 Stencil Paper (Master Making)
15 Doctor roller 18 Re-feed resist roller 21 Plate making image 21a First side plate making image 21b Second side plate making image 22 Stencil paper (master)
23 Master holding member 24 Platen roller 25 Thermal head 26 Master cutting means 31 Peeling claw 32 Paper delivery unit 33 Paper delivery stand 34 Auxiliary tray 48 Paper feed stand 51 Paper feed roller 60 Ink pool

JP 2006-015572 A Japanese Patent Laid-Open No. 2005-053184 Japanese Patent No. 454,020

Claims (7)

Paper feeding means for separating and feeding the sheets stacked on the paper feed tray one by one;
A plate making means capable of making a plate by arranging a plurality of plate making images corresponding to a plurality of originals along a rotation direction of the plate cylinder, with respect to a stencil sheet for one plate wound around a cylindrical plate cylinder,
Printing means for pressing the fed paper against the stencil sheet on the plate cylinder by pressing means, and printing the plate-making image;
A paper discharge conveying means for separating and conveying the printed paper from the plate cylinder,
A stencil printing apparatus having a high-speed printing mode in which a plurality of sheets corresponding to the plurality of plate-making images are sequentially fed during one rotation of the plate cylinder, and printing is performed on the plurality of sheets,
In the high-speed printing mode, the image forming apparatus further includes a counting unit that counts the number of the printed sheets for each plate-making image, and a display unit that displays a numerical value counted by the counting unit, according to the numerical value counted by the counting unit. The remaining number of printed sheets is adjusted for each plate-making image. A paper discharge unit detection sensor disposed on a transport path of the printed paper of the paper transport means and a downstream side of the plate cylinder in the rotation direction from a position where the printed paper is peeled off A plate cylinder detection sensor;
Determination means for determining whether printing has been normally performed from the detection results of the paper discharge unit detection sensor and the plate cylinder unit detection sensor;
2. The stencil printing apparatus according to claim 1, wherein the counting unit counts the number of printed sheets for each corresponding plate-making image in response to an input from the determination unit.   When the printed sheet is detected at a predetermined timing by the paper discharge unit detection sensor, the determination unit determines that the corresponding plate-making image has been printed normally, and the counting unit counts the number of printed sheets. The stencil printing apparatus according to claim 2.   When the printed sheet is not detected at a predetermined timing by the paper discharge unit detection sensor and is detected at a predetermined timing by the plate cylinder unit detection sensor, the determination unit determines that the printed sheet is removed from the plate cylinder. 4. The stencil printing apparatus according to claim 2, wherein the stencil printing apparatus according to claim 2, wherein the stencil printing apparatus determines that the sheet is rolled up without being peeled off, and the counting unit does not count the number of printed sheets.   When the printed paper is not detected at a predetermined timing by either the paper discharge unit detection sensor or the plate cylinder detection sensor, the determination unit determines that a paper jam or paper non-feed has occurred, and the counting unit The stencil printing apparatus according to claim 2, wherein the stencil printing apparatus does not count as the number of printed sheets.   After the plate cylinder makes one rotation or recovers from the jam or non-feed of the paper, the remaining number of printed sheets is adjusted for each plate-making image according to the value counted by the counting means. The stencil printing apparatus according to any one of claims 1 to 5. In a stencil printing method in a high-speed printing mode in which a plurality of sheets corresponding to a plurality of plate-making images are sequentially fed during one rotation of the plate cylinder, and printing is performed on the plurality of sheets.
The stencil is characterized in that the number of printed sheets is counted for each plate-making image, the counted number is displayed on a display unit, and the remaining number of printed sheets is adjusted for each plate-making image according to the counted number. Printing method.

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