JP4369964B2 - Printing device - Google Patents

Description

  The present invention relates to a printing apparatus, and more particularly to a control mechanism for sorting printing paper discharged from a printing apparatus after printing.

  One of apparatuses that can form a large amount of images from a single document is a printing apparatus, and one of the printing apparatuses is a stencil printing apparatus.

  The stencil printing machine is equipped with a master made by perforation to a rotatable plate cylinder fitted with a mesh screen of resin or metal mesh on the peripheral surface, and presses the plate cylinder and press by supplying ink from the inside of the plate cylinder. Printing is performed by exuding ink onto a printing paper that is nipped and conveyed by a roller.

  As one of the post-processing of the printing paper after printing in the seed stencil printing apparatus, there is a sorting operation for sorting the printing paper discharged and stacked on the paper discharge tray for each required number of sheets.

  Conventionally, the printing paper sorting operation is a method in which the operator sets the set number of sheets for each sorting number on the counter, sets the next printing number by setting the printing paper again after printing the set number of sheets. A method of counting and sorting printed sheets loaded and ejected has been adopted. However, in such a conventional sorting operation, the operator constantly monitors the printing status of the printing apparatus until the printing is completed, and it takes time and effort to re-count the number of printing sheets for each sorting, and the printing process is troublesome. .

  Therefore, in order to solve such a problem, the printing apparatus is provided with a memory function, the number of sorts is input using the numeric keypad on the operation panel of the printing apparatus, and the printing paper discharged according to the number of printed sheets is discharged. There is a sorting method that can be classified.

  As a sorting method, based on the number of prints input with a numeric keypad or the like, the print paper group (class) is sorted for each print number, or the number of print sheets for each print paper group (class) is different. There is a class mode method that sorts them.

  On the other hand, in the configuration used for sorting, the first printing paper or the last printing paper in the group of printing papers to be sorted is shifted in the direction opposite to the transport direction when being discharged onto the paper discharge tray by the slide arm. A configuration in which the boundary of each printing paper group is clarified (for example, Japanese Patent Application Laid-Open No. 10-166706 relating to the prior application of the present application), or suction means capable of sucking and conveying printing paper instead of the slide arm (For example, Japanese Patent Laid-Open No. 10-139260 related to the prior application of the present application).

  FIG. 2 shows a configuration of a main part of the sorting apparatus using the above-described slide arm. In FIG. 2, the sorting apparatus 60 includes an end plate 52A of the discharge table 52 and a print sheet placement surface of the discharge table 52. The slider 61 that can be moved back and forth, the moving table 62 that supports the slider 61 so as to be able to move back and forth, and that can be moved up and down, the elevating drive unit 63 of the moving table 62, and the end plate 52A are abutted to align the edges. A slider advance / retreat means 64 is provided for moving the printing paper S in the direction opposite to the discharge direction (arrow direction in the figure).

  The lift drive unit 63 includes a screw shaft 63A that is supported at both ends in the axial direction by a holding member 65 supported by the end plate 52A, a lift motor 63B that rotationally drives the screw shaft 63A, and an axial direction at the holding member 65. The movable table 62 is supported by both ends and is parallel to the screw shaft 63A. The movable table 62 can be moved up and down along the axial direction of the guide rod 63C according to the rotation direction of the lifting motor 63B.

  The slider advance / retreat means 64 includes a pinion 64A that meshes with a rack formed on the slider 61, and the pinion 64A is fixed to the rotation shaft of the advance / retreat motor 64B. The slider advance / retreat means 64 can advance / retreat from the end plate 52A with respect to the paper stacking surface of the paper discharge tray 52 according to the rotation direction of the advance / retreat motor 64B.

  The raising / lowering drive unit 63 and the slider advance / retreat means 64 move up and down toward a position corresponding to the number of sheets to be sorted on the printing paper discharged and stacked on the paper discharge tray 52, and at that position, the slider 61 is placed on the paper stacking surface of the paper discharge tray 52. By moving forward, the printing paper at the location corresponding to the sorting position of the printing paper group is shifted in the direction opposite to the discharge direction to make a sorting boundary.

  In the sorting apparatus 60 having the above-described configuration, the moving table 62 is fixed with the upper surface position of the print sheet group discharged and stacked on the sheet discharge table 52 by the first set of printing operations as the sorting initial position. When the first sheet of printing paper on which the second set of printing has been performed is discharged with the slider 61 positioned at the above position, the printing operation is temporarily interrupted. At this initial position, as shown in FIG. 7, the paper pressing portion 61A of the slider 61 that can press the leading end portion of the printing paper S1 is made to face the discharge plate 52 above the end plate 52A.

  When the leading edge of the printing paper S1 discharged first by printing on the second set of printing paper is pressed against the paper pressing portion 61A of the slider 61, the slider 61 is moved from the end plate 52A as shown in FIG. Projecting toward the inside of the paper discharge tray 52, the printing paper S1 is pushed back in the direction opposite to the discharge direction accordingly.

  The slider 61 that has pushed the print paper S1 back in the direction opposite to the discharge direction maintains the state in which the print paper S1 is pushed back until one or more continuous print papers are stacked on the pushed back print paper S1. As a result, one or more stacked printing papers are used as the weight of the pushed back printing paper, and the displacement of the pushed back printing paper can be prevented. The slider 61 returns to the state shown in FIG. 9 when the printing paper as the weight of the pushed printing paper S1 is stacked to some extent. In FIG. 9, reference numeral S <b> 1 ′ indicates the first print sheet that is discharged after the third set of printing starts.

  As described above, the printing paper pushed back by the slider 61 is not limited to the first printing paper in the group of printing papers to be sorted, but may be the last printing paper to be ejected. is there.

JP-A-10-166706 JP-A-10-139260

(Old paragraph "0015" column)
When the first print paper of the print paper group to be discharged is pushed back in the direction opposite to the discharge direction by the slider 61, the following problem occurs.

  In other words, as the first printing paper is sorted, there is a case where the printing paper which is the first printing paper after plate making is sorted. In this case, since the printing paper is sorted, it is necessary for the user to take it out for checking and return the printing paper to the sorting position if the result of the check is good. In addition, when a plurality of printing sheets are prepared and the plurality of printing sheets are returned to the original position, it is necessary to return them to a sorting position and a normal position that is not. Although it is possible to have all the multiple printing sheets returned to the sorting position, in this case, there is another sorting state, that is, only one printing sheet is pushed back in the direction opposite to the discharge direction. It is not preferable because it is different, and the sorting location may be mistaken. As described above, when the first printing paper is to be sorted, it is necessary to maintain the state sorted by the user, which increases the work load on the user.

  Furthermore, when performing additional printing, the printing operation is temporarily stopped on the first sheet obtained by the additional printing, the shifting process is performed, and then the second and subsequent sheets are continuously printed. Therefore, since the time required for the shifting process is included in the printing process as it is, the entire printing time becomes long, and the printing process cannot be speeded up.

  In addition, when the last printing paper is selected as the sorting target without targeting the first printing paper and is shifted immediately after the last printing paper is discharged, the printing paper of the second set of printing paper is sorted. If one or more sheets are discharged and stacked on the last print sheet of the first set, it is possible to control the slider 61 to shift back to the standby position. When the plate making process is executed with a change, when the plate making jam is detected and the printing operation is temporarily stopped, the last printing paper of the first printing paper group has already been shifted. Therefore, in this state, the slider 61 is shifted and returned to the standby position. For this reason, the uppermost printing paper on the paper discharge tray remains unstable at the position shifted for sorting, in other words, there is no printing paper that should become the printing paper as the weight, and after the jam is cleared. Since the printing operation will be waited for, the printing paper that has been shifted for sorting will fly out in some cases, and even if it is returned, it must be returned to a position shifted from the other printing paper. May become an unwieldy sorting device.

  An object of the present invention is to make handling easy so that the user is not burdened with sorting when the printing paper to be sorted is the first printing paper to be discharged or the last printing paper in the printing paper group. It is an object of the present invention to provide a printing apparatus having a configuration capable of improving the quality.

The invention described in claim 1 is provided with a sorting device for sorting the printing paper discharged after printing for each required number of sheets, and the sorting device discharges the printing paper at the leading edge of the printing paper located at the boundary of the printing paper group to be sorted. By pressing and pushing back in the direction opposite to the direction, it is shifted with respect to the other sheets to make the boundary of the sorting position, and after loading a new printing sheet on the upper surface of the shifted printing sheet, the member used for the shifting In a printing apparatus configured to return to a standby position that is off the upper surface of the printing paper, an operation unit provided in the main body of the printing apparatus and an operation content of the sorting apparatus provided in the operation unit are displayed. And a control unit for selecting and instructing a print mode and a sorting mode based on an operation command from the operation unit. The control unit is configured according to an operation setting in the operation unit. When the sorting mode is set, immediately before the printing operation for the next set of printing paper is started, another printing paper for the printing paper finally discharged from the previous printing paper group One or more sheets are discharged on the shifted printing paper so as to act as a weight for the shifted printing paper in a state where the leading edge is pressed in the direction opposite to the discharging direction and pushed back. Control is performed so that the member used for the shifting is returned to the shifting standby position at the point of time.

According to a second aspect of the present invention, in the printing apparatus according to the first aspect, when the printing is continuously performed, the control unit performs the next printing with respect to the shifting operation of the last discharged printing paper of the previous set. It is characterized in that the shift operation is not performed for any of the cases where the operation is not performed, the case where a jam occurs in the master for plate making, and the case where a jam occurs in the plate-making paper .

  According to the first aspect of the present invention, when the sorting mode is set, the final discharge of the previous set of print sheets is performed immediately before the printing operation for the next set of print sheets is started. Since it can be shifted with respect to other printing papers as a target, one or more next printing papers as weights are placed on the printing paper shifted for sorting at the boundary of sorting. Even when the printing apparatus is temporarily stopped so as to be stacked, a state in which the shifting process is not performed is obtained until immediately before the next set of the first printing sheet is discharged. As a result, when the next set of printing paper groups changes to the plate making process and the plate making jam occurs, and the printing apparatus is temporarily stopped, the previous set of printing paper groups are already discharged. Unlike the case where the printing paper is shifted, the shifting process is not performed, so that the shifted printing paper may fly away due to the absence of printing paper serving as a weight. , You can eliminate things that remain unstable. Accordingly, it is possible to prevent the user from having to put a sorting burden on the user who must return the printing paper to the shifted position when the printing paper is returned to the shifted position as in the case where the printer remains unstable. It becomes possible to improve.

According to the second aspect of the present invention, when printing is continuously performed, when the next printing operation is not performed with respect to the shifting operation of the finally discharged printing paper of the previous set , the jam is made to the master for plate making. For example, printing paper that has been finally ejected in the previous set is not used for any of the cases where a paper jam occurs or a paper jam occurs. As described above, when the paper is shifted immediately after discharging, the printing paper as a weight with respect to the shifted printing paper is left unstabilized without being stacked due to jamming. Can be eliminated. As a result, the shifted printing paper does not discharge the printing paper as a weight, and the printing paper sorted by shifting will fly away, so that the shifted state can not be maintained or returned, It is possible to prevent an increase in work burden on the user such as returning to a position shifted from other printing paper.

  The best mode for carrying out the present invention will be described below with reference to the illustrated embodiments.

  FIG. 1 is a schematic view showing a stencil printing apparatus which is one of printing apparatuses according to an embodiment of the present invention.

  In FIG. 1, a stencil printing apparatus 1 includes a plate cylinder 2 capable of rotating in the forward and reverse directions.

  An ink supply mechanism 3 is disposed inside the plate cylinder 2, and in the vicinity of the plate cylinder 2, a plate making unit 10 and a plate discharging unit 30 are disposed above one and the other across a vertical line passing through the center of the plate cylinder 2. The image reading unit 100 is disposed above the plate cylinder 2.

  The plate cylinder 2 is a cylinder that can be rotated forward and backward by a rotating shaft 2A, and a mesh screen is attached to a peripheral surface thereof. The mesh screen has a large number of perforations except for a part, and causes ink to ooze out. The plate cylinder 2 is provided with a master clamping mechanism having a swingable clamper 2B on the surface thereof. When the tip of the master is located in a portion where the perforation is not formed on the peripheral surface of the plate cylinder, the tip of the master is positioned. It can be gripped. The master is adhered by ink exuding on the surface of the plate cylinder 2 except for the tip.

  The ink supply mechanism 3 includes an ink roller 3A that is in contact with the inner peripheral surface of the plate cylinder 2 and a doctor roller 3B that rotates in contact with the ink roller 3A. The press roller 4 is in abutting contact with each other. Ink is stored in a wedge-shaped space formed at the facing portion between the ink roller 3A and the doctor roller 3B, is transferred to the facing portion with the press roller 4 as the ink roller 3A rotates, and oozes onto the surface of the plate cylinder 2.

  The press roller 4 is provided so as to be able to come into contact with and separate from the peripheral surface of the plate cylinder 2, and presses against the surface of the plate cylinder 2 when a printing paper S fed from a paper feeding device 5 described later arrives. Used to transfer ink from the perforations to the printing paper surface.

  The plate making unit 10 uses the thermal head 12 based on image information from the image reading unit 100 in the process in which the roll-shaped stencil master 11 mounted on the core material 11A is fed out by the platen roller 13 and the conveying roller 14. When the stencil master 11 having a necessary length is fed out after being perforated, the cutter 15 can cut the stencil master 11. The stencil master 11 that has been punched out from the plate making unit 10 is gripped by the clamping mechanism whose tip is positioned on the plate cylinder 2 as described above.

  The plate discharge unit 30 is a stencil master from above the plate cylinder 2 using a belt 32 that is stretched between one roller 30A that can contact and separate from the plate cylinder 2 and the other roller 30B that is positioned in the vicinity of the plate discharge box 31. 11 is recovered, and the recovered stencil master 11 is condensed by the compression member 33.

  The image reading unit 100 includes a light source 103 that illuminates the document P fed from the automatic document feeder onto the document placement table 101, a plurality of reflecting mirrors 105 that guide reflected light from the document P toward the CCD 104, and a connection. An image lens 106 is provided, and the CCD 104 receives reflected light from the document, and outputs image information corresponding to the document image to the control unit 20. The control unit 20 outputs a drive signal for the thermal head 12 of the plate making unit 10 based on the image information.

  A paper feeding device 5 is disposed on one side of a press roller 4 that can be brought into contact with and separated from the plate cylinder 2, and a printing paper discharging and conveying device 41 is disposed on the other side.

  The paper feeding device 5 prevents the double feeding of the printing paper S fed by the feeding roller 6 that contacts the uppermost one of the printing paper S accommodated in the paper feeding tray 5A by the separation rollers 7 and 8. The registration roller 9 feeds the printing drum 2 toward the plate cylinder 2, and the registration roller 9 sets the sheet feeding timing so as to be aligned with the image position of the stencil master 11 mounted on the plate cylinder 2. It is like that.

  The discharge conveyance device 41 sucks and conveys the printing paper S peeled off by the peeling claw 40 located in the vicinity of the plate cylinder 2 by a conveyance belt 44 wound around rollers 42 and 43 and a suction device 46 located below the belt. Then, the sheet is discharged toward a sheet discharge tray 52 described later.

  The paper discharge tray 52 is disposed on an extension line of the transfer path of the printing paper S discharged by the discharge conveyance device 41, and although not shown in detail, the paper discharge tray 52 is supported upside down with the end portion on the main body side of the stencil printing device 1 as a fulcrum. Has been. As shown in FIG. 1, the paper discharge tray 52 is tilted during printing and is in a position to receive the print paper S discharged from the discharge conveyance device 41.

  On the paper discharge tray 52, a sorting device 60 is disposed in the vicinity of the end plate 52A located in front (downstream side) of the printing paper S in the transport direction.

  FIG. 2 is a schematic diagram for explaining the sorting device 60, and is a configuration in which the light shielding pieces provided for sorting in FIG. Is used.

  The raising / lowering drive unit 63 and the slider advance / retreat means 64 are operation-controlled by the control unit 20 to be described later, and move up and down toward a position corresponding to the number of sheets to be sorted on the printing paper discharged and stacked on the paper discharge tray 52, and at that position, the slider 61. Is advanced toward the paper stacking surface of the paper discharge tray 52, so that the printing paper at the location corresponding to the sorting position of the printing paper group is shifted in the direction opposite to the discharging direction to be the boundary of sorting.

  The slider advancement / retraction means 64 is initially set to return to a shift standby position corresponding to a state in which the tip of the slider 61 is separated from the end plate 52A, as shown in FIG. Yes.

  On the other hand, the configuration of the control unit 20 is shown in FIG.

  In FIG. 3, the main part of the control unit 20 is constituted by a microcomputer. On the input side via an I / O interface (not shown), an operation unit 70, a printing operation, which will be described later, are provided as members related to the present embodiment. Various sensor groups 80 for monitoring the paper discharge operation and the sorting operation are connected to each other. On the output side, as a member related to the present embodiment, a sorting device 60, a display unit 71 provided in the operation unit 70, A warning buzzer 72 and a drive unit to the thermal head at the time of drilling are connected to various drive units necessary for executing a printing operation in the stencil printing apparatus 1. In FIG. 2, for convenience, various driving units in the stencil printing apparatus 1 connected to the output side are collectively displayed as the printing apparatus 1.

  As shown in FIG. 4, the operation unit 70 includes an operation panel. On the panel surface, various key switch groups 70A for setting a print mode, a sorting execution key switch 70B, and a print start key switch 70C. Further, a trial printing key switch 70D, a numeric keypad 70E, and the like are provided, and a liquid crystal display is provided as the display unit 71.

  As described above, the control unit 20 performs operation control related to printing including plate making processing, and also performs sorting management of printing paper.

  That is, in the control unit 20, when the sorting mode is set in the operation unit 70, the slider 61 of the sorting device 60 is printed first among the printing paper groups to be sorted according to the sorting conditions. The slider 61 is moved forward and backward to shift the printing paper finally discharged in the group with respect to other printing paper, and the printing operation is temporarily stopped from the operation unit 70 or the printing operation is automatically stopped by a paper jam detection signal. When the instruction is issued, the slider 61 is forcibly displaced to return to the standby position even when the printing paper serving as the weight is waiting to be discharged.

  When it is attempted to take out the printing paper stacked on the paper discharge tray 52 by the above-described operation control in the control unit 20, the slider 61 is withdrawn from the paper discharge tray 52, and is thus obstructed by the slider 61. The printing paper can be taken out without any problem.

  On the other hand, the control unit 20 targets the case where the sorting mode is set and the continuous printing is not set as a case where the slider 61 is forcibly shifted and returned to the standby position.

  In other words, immediately before the printing operation is started by pressing the print start key switch 70C (see FIG. 4) for the next set of printing paper, the final discharge is performed among the first set of printing paper groups that have already finished printing. A shift process is performed on the other print sheets with respect to the print sheet, and when the shift process is completed and one or more sheets are discharged, the slider 61 is shifted back to the standby position.

  By such operation control in the control unit 20, after one set of printing is finished, the printing paper that is discharged first because it is not continuous printing among the printing paper group to be newly printed on the next original, In the case of so-called printing paper, the slider 61 does not get in the way when it is taken out from the paper discharge tray 52 in order to check its printing state.

  In addition, when the printing of the printing plate is completed and printing is good, the printing start key switch 70C is pressed. At that time, the final discharge of the first printing paper group is performed. Since the printing paper is shifted, the printing paper is returned to the paper discharge tray 52 while being abutted against the end plate 52A on the finally discharged printing paper that is the shifted paper. Therefore, after one or more sheets are discharged from the returned printing paper, the slider 61 is shifted and returned to the standby position, so that it is shifted from the printing paper returned to the paper receiving tray 52 after confirmation processing. The printing paper being processed can be prevented from being confused. As a result, it is possible to eliminate the trouble of having the operator reset the boundary position between the printing paper first taken out and the printing paper already sorted.

  Since the present embodiment is configured as described above, the operation will be described with reference to FIGS. 5 and 6 in which flowcharts for explaining the operation of the control unit 20 are shown.

  FIG. 5 shows a case where the printing operation is temporarily stopped due to a paper jam or the like in the control of the control unit 20, and when the printing operation in the stencil printing apparatus 1 is started in FIG. An input determination (ST1) for printing mode setting and an input determination (ST2) for sorting mode setting on the operation unit 70 are executed. When the sorting mode is not set, normal printing processing is executed according to various printing condition settings.

  When the sorting mode setting input is executed, a printing process including a shifting process is started in accordance with the mode (ST3). In this printing process, a pause instruction is monitored by detecting a paper jam in the printing paper or pressing down a stop key 70F (see FIG. 4) of the operation unit 70.

  When a paper jam in the printing process or a temporary stop command from the operation unit 70 is determined (ST4) and the printing operation by the temporary stop is stopped, the slider 61 of the sorting device 60 is forcibly shifted and returned to the standby position. (ST5). Thus, when the printing paper is taken out from the paper discharge tray 52, the slider 61 is maintained in a state that does not interfere with the paper removal.

  It is determined whether or not the temporary stop state has been released (ST6). If it has not been released, a warning is displayed (ST7).

  On the other hand, FIG. 6 shows a case where two sets of continuous printing are performed in the sorting mode in the control of the control unit 20, and when the printing operation in the stencil printing apparatus 1 is started in FIG. The print mode setting input determination at 70 (ST10) and the sorting mode setting input determination (ST11) are executed. When the sorting mode is not set, normal print processing is executed according to various print condition settings.

  When the sorting mode setting input is executed, the printing process is started according to the mode (ST12). Also in this printing process, the detection of a paper jam in the printing paper and the monitoring of a pause command in the operation unit 70 are performed.

  It is determined whether or not the number of sheets of one set of printing paper set in the sorting mode has been discharged (ST13). When one set of printing paper is discharged, the second set of printing paper is targeted. It is determined whether or not the printing operation can be started (ST14).

  If it is determined in step ST14 that the printing operation can be started, the final discharged printing paper among the printing papers in the first set of printing papers immediately before the start of the printing operation is targeted. A shift process is executed (ST15), and then it is determined whether or not the first sheet of the second set of printing sheets has been discharged onto the slider 61 (ST16) and if it is determined that one or more sheets have been discharged. The slider 61 is shifted and returned to the standby position (ST17). In the shifting process, as shown in FIGS. 7 and 8, the paper pressing unit 61A of the slider 61 presses the finally discharged print paper in the first set of print paper, and the slider 61 is discharged in this state. The printing paper is shifted in the direction opposite to the discharge direction by being protruded toward the paper placement surface of the paper base 52. When the shifting process is completed, one or more sheets of the slider 61 are discharged onto the slider 61 and then returned to the shifting standby position as shown in FIG.

  Prior to the shifting process executed in step ST15, in this embodiment, although not shown, the presence / absence of printing paper on the paper discharge tray 52 is determined. That is, when no printing paper is placed on the paper discharge tray 52, there is no need to perform the shifting process. Therefore, the presence or absence of printing paper is detected in advance before the shifting process is performed, and there is printing paper. The shifting process is executed only for. As a result, useless processing can be omitted, and printing processing can be speeded up.

  In addition, as described above, there are cases where the operator confirms the finish of the printing plate by the first printing after the plate making. In this case, the trial-printed printing paper is taken out from the paper discharge tray 52. However, when the printing paper is returned to the paper discharge tray 52 as it is, immediately before the printing paper is discharged. Since the printing paper is shifted with respect to the other printing paper, even if the printing paper is returned to the paper discharge tray 52 as it is, the boundary with the first printing paper group that has already been sorted remains. There is no change.

  In other words, when taking out the printing plate for the first time after plate making, the final discharged printing immediately after the final printing paper of the group of printing papers before the printing plate was discharged Instead of shifting the paper, the last discharged print paper of the previous set is shifted just before the first print paper is discharged in the printing process of the next set, such as printing paper.

  As a result, if the printing paper does not discharge due to jamming, the first printing paper of the next set corresponding to the printing paper will not be discharged, so the final printing of the previous printing set The printing paper remains unshifted. For this reason, for example, when the printing paper finally discharged in the previous set is shifted immediately after discharging, the printing paper as a weight with respect to the shifted printing paper remains unstable without being stacked due to jamming. It can be eliminated by leaving it unshifted as described above. As a result, the shifted printing paper does not discharge the printing paper as a weight, so that the printing paper sorted by shifting will fly away and the shifted state will not be maintained or returned, It is possible to prevent an increase in work burden on the user such as returning to a position shifted from other printing paper.

  As described above, when the shifting process is performed on the finally discharged printing paper in the first printing paper group, for example, additional printing is performed when the sorting process has already been completed. Also useful in cases. In other words, when additional printing is performed, the final discharged printing paper of the group of printing papers sorted before the additional printing is shifted immediately before the first sheet for the additional printing is discharged. Even if the printed printing paper group is discharged, the boundary with the printing paper group that has been discharged and loaded before that is clearly defined, and the time required for the shifting process is hidden in the printing process, The processing time for the entire printing process including the shifting process is not prolonged. For this reason, even when additional printing is continuously performed once the sorting process has been completed, confusion with the printing paper group for which the sorting process has been completed can be avoided, and the printing time can be prolonged. Absent.

  Although the above embodiment has been described with respect to the configuration in which the printing paper is shifted by the back and forth operation by the slider, the present invention is not limited to such a configuration. For example, the leading edge of the printing paper can be hooked and shifted, or the printing paper can be shifted by a suction operation.

  Further, the sorting device 60 is disposed below the discharge conveyance device 40 and corresponds to the sorting position of the printing paper group by sending the slider 61 from the printing device main body side toward the paper placement surface of the paper discharge tray 52. The printing paper to be printed may be shifted in the direction opposite to the discharge direction to be used as a sorting boundary.

1 is a schematic diagram showing a stencil printing apparatus as an example of a printing apparatus according to an embodiment of the present invention. It is a schematic diagram for demonstrating the structure of the sorting apparatus used for the stencil printing apparatus shown in FIG. It is a block diagram for demonstrating the structure of the control part used for the stencil printing apparatus shown in FIG. It is a figure for demonstrating the structure of the operation part connected to the control part shown in FIG. 5 is a flowchart for explaining the operation of the control unit shown in FIG. 4. 6 is a flowchart for explaining another operation of the control unit shown in FIG. 4. It is a schematic diagram which shows an example of a sorting apparatus. It is a schematic diagram which shows the one aspect | mode of the sorting apparatus shown in FIG. It is a schematic diagram which shows the initial state of the sorting apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stencil printing apparatus 2 Plate cylinder 20 Control part 52 Paper discharge stand 60 Sorting device 61 Slider which performs printing paper shift operation 62 Moving stand 63 Lifting drive part 64 Slider advancing / retreating means 70 Operation part 71 Display part 72 Warning buzzer 80 Various sensor groups S printing paper

Claims (2)

A sorting device is provided for sorting the printing paper discharged after printing for each required number of sheets, and the sorting device presses the leading edge of the printing paper located at the boundary of the printing paper group to be sorted in the direction opposite to the printing paper discharge direction. By shifting back with respect to other paper by pushing it back, it becomes the boundary of the sorting position, and after loading a new printing paper on the upper surface of the shifted printing paper, the member used for the above-mentioned shifting is left off from the upper surface of the printing paper In the printing apparatus configured to return to the position,
An operation unit provided in the main body of the printing apparatus;
A display unit provided in the operation unit and capable of displaying the operation content of the sorting device;
A control unit for selecting and instructing a printing mode and a sorting mode based on an operation command in the operation unit,
When the sorting mode is set by the operation setting in the operation unit, the control unit sets the printing paper group of the previous set immediately before the printing operation for the next printing paper is started. This shifted printing paper is placed on the shifted printing paper with the leading edge pressed against the other printing paper in the opposite direction to the discharge direction and pushed back against the other printing paper. A printing apparatus that controls to return the member used for shifting to the shifting standby position when one or more sheets of paper that act as a weight are discharged. The printing apparatus according to claim 1.
When the printing is continuously performed, the control unit performs the next printing operation for the shifting operation of the finally discharged printing paper of the previous set, the case where a jam occurs in the master for plate making, and A printing apparatus characterized in that a shifting operation is not performed for any of the cases where any of the cases where a jamming of the printing paper occurs .

Images