JP2013216449A - Paper processing device and control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain conveyance performance while preventing a superposed state in a paper bundle from getting irregular when conveying.SOLUTION: A paper processing device has: a folding part 320 which forms a fold on paper; a paper bundle conveying part 350 which conveys the paper bundle obtained by superposing a plurality of sheets of paper on which the fold is formed by a placing part; a paper bundle presser part 360 which presses the paper bundle conveyed by the paper bundle conveying part against the placing part; and a controller 101 which determines paper bundle conveying speed that is a conveying speed of the paper bundle by the paper bundle conveying part on the basis of the state of the paper bundle and also determines whether the paper bundle is pressed by the paper bundle presser part.

Description

  The present invention relates to a sheet processing apparatus that conveys a sheet bundle formed with folds, and a control method thereof.

  By connecting various paper processing apparatuses in the image forming apparatus, various bookbinding processes can be performed and used as a printing apparatus.

  In the paper processing apparatus of such a printing apparatus, the paper is folded in the middle of the paper, and the paper in a folded state is further overlapped to form a paper bundle, and staple processing is performed on the fold portion of the paper bundle. Saddle-stitched book-like shape is possible. Further, it is also possible to output a sheet bundle in a state of being folded in a folded state without performing a stapling process.

  In such a sheet processing apparatus, in accordance with the productivity (sheet output timing) of the image forming apparatus, a sheet bundle in a folded state or a sheet bundle that is folded in a folded state is not delayed. Must be transported. In recent years, the productivity of image forming apparatuses has improved, so even inside paper processing apparatuses. There is a need to transport such a bundle of sheets as fast as possible.

  However, if an attempt is made to convey the sheet as fast as possible, the stacking state of the sheet bundle is likely to be disturbed or dropped due to the wind pressure received during the conveyance.

  Note that the following patent document proposes such a disturbance during conveyance of a sheet bundle.

JP 2005-324932 A

  In the above Patent Document 1, the sheet bundle is pressed by the friction member when the sheet bundle is conveyed. Furthermore, the shape and pressing strength of the friction member are changed according to the size (volume) of the sheet bundle so that the disturbance of the sheet bundle does not occur.

  However, when the pressing by the friction member is executed, a predetermined time is required when the pressing is performed and when the pressing is released, which is contrary to the intention to convey the image quickly according to the productivity of the image forming apparatus.

  The present invention has been made in view of such a problem, and provides a sheet processing apparatus capable of maintaining conveyance performance while preventing disturbance of a stacking state of sheet bundles during conveyance, and a control method thereof. The purpose is to do.

  (1) A sheet processing apparatus that solves the above problems includes a folding unit that forms a crease in a sheet, and a sheet bundle conveying unit that conveys a sheet bundle in which a plurality of the sheets on which the folds are formed are stacked. A sheet bundle holding unit that holds the sheet bundle conveyed by the sheet bundle conveying unit against the placement unit, and a sheet bundle conveying speed that is a conveyance speed of the sheet bundle by the sheet bundle conveying unit. A control unit that determines based on the state of the bundle and determines whether or not the sheet bundle pressing unit is pressed.

  In addition, a sheet processing apparatus control method that solves the above problems includes a folding unit that forms a crease in a sheet, and a sheet bundle conveyance that conveys a sheet bundle in which a plurality of the creased sheets are overlapped by a placement unit. And a sheet bundle holding unit that holds the sheet bundle conveyed by the sheet bundle conveyance unit against the placement unit, wherein the sheet processing unit controls the sheet by the sheet bundle conveyance unit. A sheet bundle conveying speed, which is a bundle conveying speed, is determined based on the state of the sheet bundle, and whether or not the sheet bundle pressing unit is pressed is determined without pressing the sheet bundle by the sheet bundle pressing unit. The sheet bundle conveying unit conveys the sheet bundle at the sheet bundle conveying speed, or the sheet bundle conveying unit is higher than the sheet bundle conveying speed while holding the sheet bundle by the sheet bundle holding unit. Switching to and transports the sheet bundle in a high-speed packet conveying speed.

  (2) In the sheet processing apparatus according to (1), the sheet bundle conveying unit conveys the sheet bundle in a state in which an inferior part of the fold of the sheet is supported from below by the placing unit, The sheet bundle pressing unit presses the sheet bundle against the above-described placement unit from above during the transport of the sheet bundle placed on the placement unit.

  (3) In the above paper processing (1) to (2), the paper bundle conveyance speed is determined with reference to the number of sheets, the amount of paper, and the paper size constituting the paper bundle.

  (4) In the sheet processing of (1) to (3) above, the necessary time required for reciprocation of the sheet bundle conveying unit determined according to the sheet bundle conveying speed, and the number of sheets constituting the sheet bundle Is determined so as to hold the sheet bundle by the sheet bundle pressing unit when the required conveyance time is longer than the conveyance time interval. At the same time, the sheet bundle conveyance speed is changed to the high-speed sheet bundle conveyance speed on the high speed side.

  (5) Further, according to the sheet processing apparatus control method for solving the above-described problem, a folding unit that forms a crease in the sheet and a sheet bundle in which a plurality of the sheets on which the fold is formed are stacked are conveyed by the mounting unit. A method for controlling a sheet processing apparatus, comprising: a sheet bundle conveying unit; and a sheet bundle pressing unit configured to press the sheet bundle conveyed by the sheet bundle conveying unit against the placement unit. A sheet bundle conveyance speed, which is a conveyance speed of the sheet bundle, is determined based on the state of the sheet bundle, and a conveyance necessary time required for reciprocation of the sheet bundle conveyance unit determined according to the sheet bundle conveyance speed, and the sheet A conveyance time interval as a time during which the number of sheets constituting the bundle is supplied to the sheet bundle conveyance unit, and when the required conveyance time is greater than the conveyance time interval, the sheet bundle conveyance speed is set to On the high speed side Change the speed sheet bundle conveying speed, while suppressing the sheet bundle by the sheet bundle pressing unit, the sheet bundle conveying unit controls so as to convey the sheet bundle by the high-speed packet conveying speed.

  (6) In the above-described sheet processing (1) to (5), the required conveyance time required for the reciprocation of the sheet bundle conveying unit determined according to the sheet bundle conveying speed, and the number of sheets constituting the sheet bundle Is determined as a time to be supplied to the sheet bundle conveyance unit, and when the necessary conveyance time is larger than the conveyance time interval, the sheet bundle conveyance speed is set to the high speed sheet bundle on the high speed side. The required high-speed transport time required for the reciprocation of the sheet bundle transport unit when the transport speed is changed is obtained, and when the required high-speed transport time is longer than the transport time interval, the required transport time and the required high-speed transport time If the required transport time is shorter than the required high-speed transport time, the sheet bundle is transported by the sheet bundle transport unit at the sheet bundle transport speed. If the time required for high-speed conveyance is less than the time required for conveyance of the sheet bundle, the sheet bundle is conveyed by the sheet bundle conveyance unit at the high-speed sheet bundle conveyance speed while suppressing the sheet bundle by the pressing unit. Control to do.

  (7) In the above paper processing (1) to (6), either the setting that places importance on the quality of the paper bundle in the paper processing or the setting that places importance on the quietness when processing the paper bundle in paper processing. If it is, the control is performed not to execute the pressing of the sheet pressing portion.

  (8) In the above paper processing (1) to (7), either the setting that places importance on the quality of the paper bundle in the paper processing or the setting that places importance on the quietness when processing the paper bundle in paper processing. If no sheet is set, the sheet pressing unit is controlled to perform pressing.

  In the above-described sheet processing apparatus and sheet processing apparatus control method, the sheet bundle conveyance speed, which is the conveyance speed of the sheet bundle by the sheet bundle conveyance unit, is determined based on the state of the sheet bundle (the sheets constituting the sheet bundle), and the sheet bundle Decide whether or not to hold down by the holding unit, and the sheet bundle conveying unit conveys the sheet bundle at the sheet bundle conveying speed without holding the sheet bundle by the sheet bundle holding unit, or while holding the sheet bundle by the sheet bundle holding unit The sheet bundle conveyance unit switches whether the sheet bundle is conveyed at a high-speed sheet bundle conveyance speed higher than the sheet bundle conveyance speed. As a result, it is possible to maintain the conveyance performance while preventing the sheet bundle from being disturbed during conveyance.

  Also, the required transport time required for the reciprocation of the paper bundle transport unit determined according to the paper bundle transport speed and the transport time interval as the time when the number of sheets constituting the paper bundle are supplied to the paper bundle transport unit are obtained. When the required conveyance time is longer than the conveyance time interval, the sheet bundle pressing unit is controlled to hold the sheet bundle, and the sheet bundle conveyance speed is changed to the high-speed sheet bundle conveyance speed. As a result, it is possible to reliably maintain the conveyance performance while preventing disturbance of the overlapping state of the sheet bundle during conveyance.

  Also, the required transport time required for the reciprocation of the paper bundle transport unit determined according to the paper bundle transport speed and the transport time interval as the time when the number of sheets constituting the paper bundle are supplied to the paper bundle transport unit are obtained. If the required transport time is longer than the transport time interval, obtain the required high-speed transport time required for reciprocation of the paper bundle transport unit when the paper bundle transport speed is changed to the high-speed paper bundle transport speed. If the required time is longer than the transfer time interval, compare the required transfer time with the required high-speed transfer time to find the smaller one, and if the required transfer time is less than the required high-speed transfer time, transfer the bundle of sheets. If the time required for high-speed transport is less than the time required for transporting paper bundles, the paper bundle transport unit is controlled at a high speed and the paper bundle transport unit is used to control It controls to convey the sheet bundle by the bundle of paper transport. As a result, it is possible to maintain the conveyance performance as much as possible while preventing disturbance of the stacking state of the sheet bundle during conveyance.

  In addition, if the setting is focused on quality or the setting is focused on quietness, control is performed so that pressing of the paper pressing unit is not executed, and the setting is focused on quality or focused on quietness. When none of the settings is set, control is performed so that pressing of the sheet pressing unit is executed. As a result, it is possible to maintain the conveyance performance as much as possible while preventing disturbance of the stacking state of the sheet bundle during conveyance.

1 is a block diagram illustrating a configuration of a sheet processing apparatus according to an embodiment of the present invention. It is a block diagram which shows the structure of the paper processing apparatus of embodiment of this invention. 1 is a configuration diagram illustrating a configuration of a main part of a sheet processing apparatus according to an embodiment of the present invention. It is explanatory drawing which shows the operation state of the paper processing apparatus of embodiment of this invention. It is explanatory drawing which shows the operation state of the paper processing apparatus of embodiment of this invention. It is explanatory drawing which shows the operation state of the paper processing apparatus of embodiment of this invention. It is explanatory drawing which shows the operation state of the paper processing apparatus of embodiment of this invention. 6 is a flowchart illustrating an operation of the sheet processing apparatus according to the embodiment of the present invention. It is explanatory drawing which shows control of the conveyance speed of the paper processing apparatus of embodiment of this invention. It is explanatory drawing which shows an example of the operation screen of the paper processing apparatus of embodiment of this invention. FIG. 6 is a characteristic diagram illustrating a control state of the sheet processing apparatus according to the embodiment of the present invention. FIG. 6 is a characteristic diagram illustrating a control state of the sheet processing apparatus according to the embodiment of the present invention. 6 is a flowchart illustrating an operation of the sheet processing apparatus according to the embodiment of the present invention. FIG. 6 is a characteristic diagram illustrating a control state of the sheet processing apparatus according to the embodiment of the present invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.

[Configuration of image forming system]
A configuration of an image forming system including a sheet processing apparatus according to the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, this image forming system shows a specific example including an image forming apparatus 100, a reverse conveying apparatus 200, a sheet processing apparatus 300, and a sheet processing apparatus 400. Note that the configuration of the image forming system is an example, and the present invention is not limited to the number of connections and the connection configuration.

  The image forming apparatus 100 controls each unit in the image forming apparatus 100 and controls the entire system as a sheet processing apparatus, a communication unit 102 for communicating with other connected apparatuses, and an operator An operation display unit 103 for notifying the control unit 101 of an operation input signal corresponding to an operation input by the user and displaying the status of the image forming apparatus 100; storing a control program and various setting data; and using it as a work area for the control program Storage unit 104, sheet feeding unit 105 that feeds the stored paper, transport unit 110 that feeds the fed and image-formed paper at a predetermined speed, and scans the document to generate image data A document reading unit 120 that performs image formation, an image data storage unit 130 that stores image data and various types of data for image formation, and an image formation necessary for image formation An image processing unit 140 for executing a seed image processing, an image forming unit 150 for performing image formation (printing) on the basis of the image formation instruction and the image data is configured to include a. Note that the paper on which the image is formed by the image forming apparatus 100 is carried out toward the reverse conveyance apparatus 200 at the subsequent stage.

  The reverse conveyance device 200 is connected to the subsequent stage of the image forming apparatus 100 and the previous stage of the paper processing apparatus 300, and includes a control unit 201 that controls each part in the reverse conveyance apparatus 200, the image forming apparatus 100, and the paper processing apparatus. A communication unit 202 for communicating with 300, a storage unit 204 for storing a control program and various setting data and used as a work area for the control program, a transport unit 210 for transporting paper at a predetermined speed, and an image forming apparatus The reversing unit 220 reverses the sheet from 100 and sends it to the subsequent stage, and the aligning unit 230 that aligns the reversed sheet.

  The sheet processing apparatus 300 is a post-processing apparatus connected to the subsequent stage of the image forming apparatus 100 and the reverse conveyance apparatus 200, and includes a control unit 301 that controls each unit in the paper processing apparatus 300, the image forming apparatus 100, and the reverse conveyance apparatus. 200 for communicating with 200, a storage unit 304 for storing a control program and various setting data and used as a work area for the control program, and a discharge for selecting a discharge path for discharging the post-processed sheet bundle A route selection unit 305, a sheet bundle conveyance unit 310 that conveys sheets at a predetermined speed, a folding unit 320 that folds a sheet in half or in three, and a stack that overlaps sheets for post-processing. Section 330, saddle stitching section 340 for performing saddle stitching as post-processing on a bundle of sheets folded by folding section 320 and superimposed by overlapping section 330, and paper A sheet bundle conveying unit 350 that conveys the sheet bundle, a sheet bundle pressing unit 360 that holds the sheet bundle conveyed by the sheet bundle conveying unit 350, a cutting unit 370 that cuts the edge of the sheet bundle, and a sheet bundle that is discharged. And a booklet discharge unit 380.

  The sheet processing apparatus 400 is a post-processing apparatus connected to a subsequent stage of the sheet processing apparatus 300, and communicates with the control unit 401 that controls each unit in the sheet processing apparatus 400, and the image forming apparatus 100 and the sheet processing apparatus 300. A communication unit 402, a storage unit 404 that stores a control program and various setting data and is used as a work area for the control program, and a discharge path selection unit 405 that selects a discharge path for discharging a post-processed sheet bundle. , A transport unit 410 that transports paper at a predetermined speed, a staple unit 420 that staples a bundle of paper, a main tray discharge unit 440 that discharges paper using the main tray as a discharge destination, and discharges paper using the sub-tray as a discharge destination. And a sub-tray discharge unit 450.

  The connection of the image forming apparatus 100, the reverse conveying apparatus 200, the paper processing apparatus 300, and the paper processing apparatus 400 in FIGS. 1 and 2 is an example of an image forming system, and is not limited to such a connection. Absent. For example, the reverse conveying device 200 can be built in the paper processing device 300.

  Further, in the mechanical configuration of FIG. 2 and FIG. 3, the principle configuration of the main part is mainly shown, and known paper conveyance and alignment are shown in a omitted state.

  In FIG. 2, when the paper transported in the X direction from the image forming apparatus 100 is post-processed by the paper processing apparatus 400, the post-processing is executed while being transported in the X direction and discharged.

  On the other hand, when the post-processing is executed in the paper processing device 300, the paper and the folding knife are sandwiched between the two rollers while pushing up the paper with the folding knife from below in the folding unit 320 shown in FIG. A crease with a ridge is formed and a middle fold is executed. Then, the folded sheet is overlapped by the overlapping unit 330 while being conveyed in the Y direction to form a sheet bundle. The saddle stitching unit 340 executes saddle stitching on the bundle of sheets by stapling processing. Further, the sheet bundle is conveyed in the Y direction and placed on the placement unit 351 of the sheet bundle conveying unit 350, and the sheet bundle is conveyed in the −X direction by the sheet bundle conveying unit 350 and sent to the cutting unit 370.

  As described above, the sheet that has been conveyed in the X direction by the image formation is formed with a fold in the Y direction to form a sheet bundle, and the sheet bundle is conveyed in the Y direction parallel to the fold to perform saddle stitching. As a result, the execution efficiency of post-processing increases, and the productivity of the image forming system can be increased.

  Further, the perspective view of FIG. 3 schematically shows a state in which the sheet bundle subjected to the edge processing by the cutting unit 370 is discharged from the booklet discharge unit 380 in the part 300B of the sheet processing apparatus 300. Here, the booklet sending unit 380a is configured by a roller for nipping and conveying the sheet bundle so as to send out the sheet bundle according to the control of the control unit 301. The discharge conveyance unit 380b includes a wide endless belt that conveys the sheet bundle and a driving roller.

  Further, as shown in FIG. 4, the sheet bundle transport unit 350 includes a bowl-shaped mounting unit 351 that supports a subordinate angle (angle less than 180 °) of the fold of the sheet bundle Pp from below. Then, in a state where the sheet bundle Pp sent from the overlapping unit 330 in the Y direction is placed on the bowl-shaped placement unit 351 (see FIG. 5), the placement unit 351 is moved in the −X direction by the drive unit 355. By driving in the X direction, the sheet bundle is conveyed toward the cutting unit 370 (see FIGS. 6 to 7).

  When the sheet bundle conveying unit 350 conveys the sheet bundle Pp, the pressing lever 362 of the sheet bundle pressing unit 360 moves the sheet bundle Pp from above under the control of the control unit 301 under a predetermined condition. Press against the mounting portion 351. Then, the sheet bundle pressing unit 360 is moved in the −X direction or the X direction integrally with the sheet bundle conveying unit 350 by driving of the driving unit 365 (see FIGS. 6 to 7).

  In addition, about the drive part 355 and the drive part 365, since well-known various mechanisms are employable, it abbreviate | omits for details.

  Further, although a state in which the pressing lever 362 is pressing near the center of the fold of the sheet bundle Pp in the sheet pressing unit 360 is shown as a specific example, the present invention is not limited to this. For example, the pressing lever 362 may be a plurality of pressing levers 362 such as two or three, or may have a shape that presses on a wide surface. Various changes can be made to the shape and drive mechanism of the holding lever 362 and the column 361.

[Operation (1)]
Hereinafter, the operation of the sheet processing apparatus 300 in the image forming system of this embodiment will be described with reference to the flowchart of FIG.

  When image formation is started in the image forming apparatus 100, the control unit 301 of the paper processing apparatus 300 displays information on image formation (image formation information: paper type, paper size, amount of paper, conveyance speed, etc.) and post-processing. Information relating to the processing mode (post-processing mode information: the number of sheets constituting the sheet bundle, folding presence / absence, folding type, binding selection presence / absence of cutting selection, etc.) is requested to the control unit 101.

  In response to this, the control unit 101 notifies the control unit 301 of image formation information and post-processing mode information related to the sheet processing apparatus 300 from the job information.

  Upon receiving the image formation information and the post-processing mode information, the control unit 301 determines whether the folding type of the post-processing to be executed is “tri-fold” or “half-fold”. Here, a specific example of the sheet processing apparatus 300 is a case of performing middle folding to saddle stitching to cutting to discharging or middle folding to cutting to discharging.

  In the sheet processing apparatus 300, the sheet bundle conveying unit 310 conveys the sheet sent from the image forming apparatus 100 in the X direction in FIG. 2 in accordance with the sheet discharge interval of the image forming apparatus 100. Then, the folded portion 320, the overlapping portion 330, and the saddle stitching portion 340 convey the sheet bundle in the Y direction as a state of being folded and overlapped. Further, the sheet bundle conveyance unit 350 conveys the sheet bundle toward the cutting unit 370 in the −X direction.

  Here, the control unit 301 determines a normal sheet bundle conveyance speed using the sheet bundle conveyance unit 350 in the sheet processing apparatus 300 in a state suitable for the sheet bundle from the image formation information and the post-processing information (FIG. 8). Middle step S101). In this embodiment, the “sheet bundle conveying speed” means a moving speed in conveying the sheet bundle placed on the loading unit 351.

  Regarding the transport of paper bundles, there is a possibility that paper bundles may be disturbed by the wind pressure received during transport, so paper bundle transport that can maintain transport performance while preventing disturbance of the stacking state of paper bundles during transport. The control unit 301 determines the speed with reference to image formation information and post-processing mode information.

  As shown in FIG. 9, the control unit 301 performs various operations such as the presence / absence of saddle stitching, the number of sheets constituting the sheet bundle, the amount of paper, the sheet area, and the paper type (whether or not slippery). Considering the conditions, the ease of disturbance of the sheet bundle due to the wind pressure received during conveyance is determined, and the conveyance speed at which the sheet bundle is not disturbed is determined.

  Here, the high / medium / low speed of the sheet bundle conveyance speed is a relative value in the sheet processing apparatus 300. For this reason, an actual numerical value can be arbitrarily determined. Further, the sheet bundle conveyance speed can be controlled in other than three stages. Also, slipperiness may be affected by environmental conditions such as humidity. For example, it becomes slippery at low humidity and, conversely, slippery at high humidity. Therefore, it is possible to provide a humidity sensor in the sheet processing apparatus 300 and add environmental conditions (low humidity / medium humidity / high humidity) to the determination items as the state of the sheet bundle.

  Further, the control unit 301 obtains the necessary conveyance time required for the reciprocation of the sheet bundle conveying unit 350 determined according to the above-mentioned sheet bundle conveying speed as the sheet processing productivity (step S102 in FIG. 8). In this necessary conveyance time, the loading unit 351 at the initial position (FIG. 4) is driven by the driving unit 355 to transfer the sheet bundle to the cutting unit 370 (FIG. 7) and to the initial position (FIG. 4) again. This is the time required to return, and is determined by the sheet bundle conveyance speed because it moves a certain distance.

  Further, the control unit 301 refers to the image formation information from the control unit 101, and sets a conveyance time interval as a time when the number of sheets constituting the sheet bundle is supplied from the image forming apparatus 100 to the sheet processing apparatus 300. Ask. The conveyance time interval is determined by the sheet discharge interval of the image forming apparatus 100 × the number of sheets constituting the sheet bundle.

  For example, when the sheet bundle conveyance speed of the loading unit 351 is low, one way is 5 seconds, when the sheet bundle conveyance speed of the loading unit 351 is medium speed, 3 seconds one way, and when the sheet bundle conveyance speed of the loading unit 351 is high, one way is 1 second. Suppose that Note that it is assumed that it takes 1 second when the loading unit 351 returns the bundle of sheets to the cutting unit 370 and returns. In this case, the required conveyance time when the sheet bundle conveyance speed of the loading unit 351 is low is 6 seconds (5 seconds going forward + 1 second backward), and the necessary transportation time at medium speed is 4 seconds (3 seconds going forward + 1 second backward). The required high-speed transport time is 2 seconds (1 second forward + 1 second backward).

  For example, when the image forming apparatus 100 forms and outputs an image on 120 sheets of paper per minute, the sheet discharge interval is 0.5 seconds. In this case, the conveyance time interval in the case of a sheet bundle of 20 sheets is 0.5 seconds × 20 = 10.0 seconds, and the conveyance time interval in the case of a sheet bundle of 10 sheets is 0.5 seconds × 10 = In the case of 5.0 seconds and a sheet bundle of 7 sheets, the conveyance time interval is 0.5 seconds × 7 = 3.5 seconds.

  Then, the control unit 301 determines whether or not the productivity of the entire image forming system is reduced due to the sheet processing of the sheet processing apparatus 300 from the above required conveyance time and the conveyance time interval (FIG. 8). Middle step S103).

  In this case, if the required transfer time is longer than the transfer time interval, the productivity is lowered. For example, if the conveyance time interval is 5 seconds, the productivity decreases when the sheet bundle conveyance speed is low and the conveyance time is 6 seconds. For example, even if the conveyance time interval is 5 seconds, if the sheet bundle conveyance speed is medium and the conveyance time is 4 seconds, productivity does not decrease.

  If the productivity is not lowered by the sheet processing apparatus 300 (NO in step S103 in FIG. 8), the control unit 301 makes a setting that places importance on the quality of the sheet bundle in the sheet processing, or at the time of processing the sheet bundle in the sheet processing. It is checked whether any setting that places importance on quietness is set (step S104 in FIG. 8).

  In this embodiment, when the sheet bundle conveying unit 350 conveys the sheet bundle Pp, the pressing lever 362 of the sheet bundle pressing unit 360 may perform an operation of pressing the sheet bundle Pp against the placement unit 351 from above. There is a possibility that an operation sound is generated by this operation and the quietness is lowered, or a press mark is left on the sheet bundle by the pressing and the quality is lowered.

  Therefore, in this embodiment, the setting that places importance on the quality of the sheet bundle or the setting that places importance on the quietness when processing the sheet bundle in the sheet processing is specifically the sheet in the sheet processing in the sheet processing apparatus. This means a processing mode including not operating the sheet bundle pressing unit 360 when conveying the sheet bundle by the bundle conveying unit 350.

  In this embodiment, the setting that places importance on the quality of the sheet bundle in the paper processing or the setting that places importance on the quietness during the processing of the paper bundle in the paper processing may be two different types of settings. It may be one type of the same setting. In the setting screen of FIG. 10, the setting that emphasizes the quality of the sheet bundle in the paper processing and the setting that emphasizes the quietness during the processing of the paper bundle in the paper processing are one type of the same setting. Yes.

  For example, when accepting image formation settings, the control unit 101 displays the setting screen shown in FIG. 10 on the display screen of the operation display unit 103, and the operator places importance on the quality of the sheet bundle and the quietness of the processing ( FIG. 10A is received. When the icon shown in FIG. 10B is clicked and the “OK” button is pressed, settings that place importance on the quality of the sheet bundle and the quietness of the processing are made, and the control unit 101 controls the control unit 301. Is notified as a part of post-processing mode information.

  When productivity is not lowered by the sheet processing apparatus 300 (NO in step S103 in FIG. 8), and in the sheet processing, settings that place importance on the quality and quietness of the sheet bundle are not made (step in FIG. 8). (NO in S104), the control unit 301 operates the sheet bundle pressing unit 360 and changes the sheet to the sheet bundle conveyance speed higher than the sheet bundle conveyance speed determined in step S101. The productivity of the bundle conveyance unit 350, that is, the time required for high-speed conveyance required for the reciprocation of the placement unit 351 is obtained (step S105 in FIG. 8).

  Then, the control unit 301 executes the sheet bundle pressing and changes the speed to the high-speed sheet bundle conveying speed, so that the productivity is improved, that is, the time required for the high-speed conveyance with the sheet pressing is necessary for the conveyance without the sheet pressing. It is determined whether it is shorter than the time (step S106 in FIG. 8). In the determination in step S106, the fact that some processing time is available is treated as an improvement in productivity.

  FIG. 11 shows a state in which the sheet bundle is not pressed and conveyed at a low speed (one-dot chain line), a state in which the sheet bundle is not pressed at a medium speed (two-dot chain line), and a state in which the sheet bundle is pressed at a high speed. In the state (solid line), the vertical axis indicates the position of the placement unit, and the horizontal axis indicates the required conveyance time. In the specific example of FIG. 11, the necessary conveyance time when the sheet bundle conveyance speed is low is 6 seconds (outward 5 seconds + return 1 second), and the necessary conveyance time when the sheet bundle conveyance speed is medium speed is 4 seconds (outward 3 seconds + 1 sec.), And the sheet bundle conveyance speed at high speed is 3 seconds (press execution 0.5 seconds + forward 1 second + press release 0.5 seconds + recovery 1 second). That is, when the sheet bundle conveying speed is low or medium, productivity is improved by executing sheet bundle pressing to change to a high sheet bundle conveying speed (YES in step S106 in FIG. 8). .

  Also, by carrying out sheet bundle pressing to achieve a medium speed sheet bundle conveying speed, the necessary conveyance time is 5 seconds (pressing execution 0.5 seconds + forward 3 seconds + press release 0.5 seconds + return 1 second) Therefore, when the sheet bundle conveyance speed is low, the productivity is improved (YES in step S106 in FIG. 8).

  That is, when productivity is improved by executing sheet bundle pressing and changing the sheet bundle conveyance speed (YES in step S106 in FIG. 8), the control unit 301 controls the sheet bundle of the sheet bundle conveyance unit 350. During conveyance, the sheet bundle pressing unit 360 is set to be pressed (step S107 in FIG. 8), and the sheet bundle conveying speed of the sheet bundle conveying unit 350 is set to a high-speed sheet bundle conveying speed that improves productivity. (Step S108 in FIG. 8). Note that the high-speed sheet bundle conveyance speed in step S108 is a sheet bundle conveyance speed determined to have improved productivity in step S106, and includes a medium-speed sheet bundle conveyance speed.

  Then, the control unit 301 conveys the sheet bundle by the sheet bundle conveying unit 350 according to the above setting (the sheet bundle is pressed by the sheet bundle pressing unit 360 and the sheet bundle conveying speed is changed to the high speed side) (in FIG. 8). In step S109, the paper processing in the paper processing apparatus 300 is controlled.

  In addition, when setting is made so as to emphasize the sheet bundle quality and the quietness during processing (YES in step S104 in FIG. 8), the control unit 301 avoids the operation sound and the pressing trace of the sheet bundle pressing unit 360. Is determined not to press the sheet bundle pressing unit 360 when the sheet bundle conveying unit 350 conveys the sheet bundle (step S110 in FIG. 8), and determined from the image formation information and the post-processing information (in FIG. 8). A normal sheet bundle conveyance speed suitable for the sheet bundle subjected to step S101) is set (step S111 in FIG. 8).

  Also, the setting that emphasizes the sheet bundle quality and quietness during processing is not made (NO in step S104 in FIG. 8), and the sheet bundle pressing is executed and the sheet bundle conveying speed is changed to the high speed side. If the performance does not improve (NO in step S106 in FIG. 8), the control unit 301 sets the sheet bundle pressing unit 360 to be not pressed when the sheet bundle conveying unit 350 conveys the sheet bundle (FIG. 8). In addition to the step S110 in the middle, a normal sheet bundle conveyance speed suitable for the sheet bundle determined from the image formation information and the post-processing information (step S101 in FIG. 8) is set (step S111 in FIG. 8).

  Then, the control unit 301 conveys the sheet bundle by the sheet bundle conveying unit 350 according to the above setting (no pressing by the sheet bundle pressing unit 360, normal sheet bundle conveying speed) (step S112 in FIG. 8). The paper processing in the paper processing apparatus 300 is controlled.

  Further, it is determined whether the productivity of the entire image forming system is reduced due to the paper processing of the paper processing device 300 (step S103 in FIG. 8), and the productivity is reduced by the paper processing device 300. In this case (YES in step S103 in FIG. 8), the control unit 301 operates the sheet bundle pressing unit 360 in a state where the sheet bundle conveying speed determined in step S101 is higher than the sheet bundle conveying speed determined in step S101. When the change is made, the productivity of the sheet bundle conveyance unit 350, that is, the time required for high-speed conveyance required for the reciprocation of the placement unit 351 is obtained (step S113 in FIG. 8).

  Then, the control unit 301 determines whether or not the decrease in productivity of the entire image forming system caused by the sheet processing of the sheet processing apparatus 300 is resolved by executing sheet bundle pressing and changing to a high sheet bundle conveyance speed. Is determined (step S114 in FIG. 8).

  In this case, the required transport time and the transport time interval are compared, and if the required transport time is equal to or shorter than the transport time interval, the decrease in productivity is eliminated. For example, when the conveyance time interval is 5 seconds, the sheet bundle conveyance speed is low, the conveyance necessary time is 6 seconds (the dashed line in FIG. 11), and the productivity is reduced. If the bundle conveyance speed is changed to the high speed side and the necessary conveyance time becomes 3 seconds (solid line in FIG. 11), the productivity reduction is eliminated (YES in step S114 in FIG. 8). Although not shown in FIG. 11, when the sheet bundle pressing is executed and the medium sheet bundle conveying speed is set, the necessary conveyance time is 5 seconds (pressing execution 0.5 seconds + forward 3 seconds + press release). Therefore, when the conveyance time interval is 5 seconds, the decrease in productivity is eliminated (YES in step S114 in FIG. 8).

  That is, when the productivity drop is resolved by executing the sheet bundle pressing and changing the sheet bundle conveyance speed (YES in step S114 in FIG. 8), the control unit 301 controls the sheet of the sheet bundle conveyance unit 350. When the bundle is conveyed, the sheet bundle pressing unit 360 is set to be pressed (step S115 in FIG. 8), and the sheet bundle conveying speed of the sheet bundle conveying unit 350 is set to a speed at which the productivity reduction is eliminated (FIG. 8). 8 in step S116).

  Then, the control unit 301 conveys the sheet bundle by the sheet bundle conveying unit 350 according to the above setting (the sheet bundle is pressed by the sheet bundle pressing unit 360 and the sheet bundle conveying speed is changed to the high speed side) (in FIG. 8). In step S117), the paper processing in the paper processing apparatus 300 is controlled.

  In addition, when the decrease in productivity is not eliminated even by executing the sheet bundle pressing and changing the sheet bundle conveying speed to the high speed side (NO in step S114 in FIG. 8), the control unit 301 performs the sheet bundle pressing. The required high-speed conveyance time when executed and changed to the high-speed sheet bundle conveyance speed is compared with the normal conveyance necessary time without sheet pressing (step S118 in FIG. 8). That is, the productivity is reduced by the sheet processing apparatus 300 (YES in step S103 in FIG. 8), and the decrease in productivity is not eliminated by executing sheet bundle pressing and changing the sheet bundle conveyance speed to the high speed side (FIG. No in step S114 in FIG. 8), and within that range, it is determined which of the required high-speed transfer time with pressing and the normal transfer required time is shorter and the productivity is higher.

  Here, when the normal conveyance required time without pressing is shorter than the high-speed transfer required time with pressing and the productivity is high (see FIG. 12) (YES in step S118 in FIG. 8), the control unit 301. Is determined not to press the sheet bundle pressing unit 360 when the sheet bundle conveying unit 350 conveys the sheet bundle (step S119 in FIG. 8), and determined from the image formation information and the post-processing information (in FIG. 8). A normal sheet bundle conveyance speed suitable for the sheet bundle that has been subjected to step S101) is set (step S120 in FIG. 8).

  Note that the example shown in FIG. 12 shows a case where the required conveyance time is different from that in FIG. 11, but even if the conveyance speed is changed to the high-speed sheet bundle conveyance speed with pressing, it is caused by the time for pressing and releasing. Thus, the case is shown in which the normal conveyance required time is shorter than the high-speed conveyance necessary time with pressing and the productivity is increased.

  Then, the control unit 301 conveys the sheet bundle by the sheet bundle conveyance unit 350 according to the above setting (no pressing by the sheet bundle pressing unit 360, normal sheet bundle conveyance speed) (step S121 in FIG. 8). The paper processing in the paper processing apparatus 300 is controlled. In this case, the control unit 301 notifies the control unit 101 of a decrease in productivity due to paper processing. Receiving this, the control unit 101 performs control so as to reduce the productivity on the image forming apparatus 100 side so that the conveyance time interval becomes equal to or longer than the necessary conveyance time.

  In addition, when the sheet bundle pressing is executed and the sheet bundle conveying speed is changed to the high speed side, the productivity reduction is not eliminated (NO in step S114 in FIG. 8). When the productivity is high in a shorter time than the normal conveyance required time (NO in step S118 in FIG. 8), the control unit 301 controls the sheet bundle pressing unit 360 when the sheet bundle conveyance unit 350 conveys the sheet bundle. In addition to setting the presser to be present (step S122 in FIG. 8), the sheet bundle conveyance speed of the sheet bundle conveyance unit 350 is set to a high-speed sheet bundle conveyance speed that improves productivity (step S123 in FIG. 8).

  Then, the control unit 301 conveys the sheet bundle by the sheet bundle conveying unit 350 according to the above setting (the sheet bundle is pressed by the sheet bundle pressing unit 360 and the sheet bundle conveying speed is changed to the high speed side) (in FIG. 8). In step S124, the paper processing in the paper processing apparatus 300 is controlled. Also in this case, the control unit 301 notifies the control unit 101 of a decrease in productivity due to the sheet processing apparatus 300. Receiving this, the control unit 101 performs control so as to reduce the productivity on the image forming apparatus 100 side so that the conveyance time interval becomes equal to or longer than the necessary conveyance time.

[Operation (2)]
In the embodiment described in the above operation (1), the sheet is conveyed at the normal sheet bundle conveyance speed determined from the image formation information and the post-processing information, or the sheet bundle pressing is executed and the sheet bundle conveyance speed is increased to the high speed side. Either changed and transported.

  When the sheet bundle pressing is executed and the sheet bundle conveying speed is changed to the high speed side, the sheet lever P362 presses the sheet bundle Pp from the top to the placement unit 351 from the top. Then, the control is performed so as to start the conveyance of the sheet bundle conveyance unit 350.

  On the other hand, when executing sheet bundle pressing and changing the sheet bundle conveyance speed to the high speed side, the control unit 301 can switch between the controls shown in FIGS. 13 and 14.

  The control unit 301 considers various conditions such as the presence / absence of saddle stitching, the number of sheets constituting the sheet bundle, the amount of paper, the sheet area, the sheet type (whether or not slippery), the wind pressure received during conveyance, etc. It is determined whether the sheet bundle is difficult to be disturbed (step S201 in FIG. 13). Here, the phrase “difficult to disturb” means a case where a non-slip sheet or a relatively thick sheet is used, and a sheet bundle is hardly affected by wind pressure.

  When the control unit 301 determines that the sheet bundle is not easily disturbed by the wind pressure received during conveyance (NO in step S201 in FIG. 13), the control unit 301 causes the sheet bundle to be pressed by the pressing lever 362 of the sheet bundle pressing unit 360. Pp is pressed from above onto the placement unit 351 (step S202 in FIG. 13), and the sheet bundle conveyance unit 350 is controlled to start conveyance at a high sheet bundle conveyance speed (steps S203 and FIG. 14 in FIG. 13). Dashed line).

  On the other hand, when the control unit 301 determines that the sheet bundle is less likely to be disturbed by the wind pressure received during conveyance (YES in step S201 in FIG. 13), the control unit 301 determines from the image formation information and the post-processing information. The conveyance is started at a normal sheet bundle conveyance speed suitable for the sheet bundle determined (step S101 in FIG. 8) (step S204 in FIG. 8), and the holding lever 362 of the sheet bundle holding unit 360 is executed during the conveyance. Thus, the sheet bundle Pp is controlled to be pressed against the placement unit 351 from above (step S205 in FIG. 13, solid line (a) region in FIG. 14). Then, the control unit 301 presses the sheet bundle Pp against the placement unit 351 from above with the pressing lever 362 of the sheet bundle pressing unit 360, and then starts the conveyance of the sheet bundle conveyance unit 350 at the high-speed sheet bundle conveyance speed. Control (step S206 in FIG. 13, solid line (b) region in FIG. 14).

  In this case, the sheet bundle Pp is pressed against the placement unit 351 from the top by the pressing lever 362 of the sheet bundle pressing unit 360 because the sheet bundle is being conveyed at a normal sheet bundle conveying speed, so that the sheet bundle is hardly disturbed. In addition, the sheet bundle Pp is pressed against the placement unit 351 from above by the pressing lever 362 of the sheet bundle pressing unit 360 during the conveyance at the normal sheet bundle conveyance speed, not during the stop, so that the characteristic shown by the solid line in FIG. In addition, it is possible to shorten the time required for conveyance.

  As for the operation for shortening the conveyance time as indicated by the solid line in FIG. 14, when the sheet bundle pressing is executed and the sheet bundle conveyance speed is changed to the high speed side, the productivity reduction is not eliminated (step in FIG. 8). By using it for NO) in S114, etc., there is a possibility that the decrease in productivity caused by the sheet bundle conveyance of the sheet processing apparatus 300 can be solved.

[Other Embodiments]
In the embodiment described above, in the image forming system that transports the paper on which the image is formed in the X direction, the paper bundle with the crease with the Y direction as the ridge line is transported in the −X direction by the paper bundle transport unit 350. However, the conveyance direction and folding direction of the paper are not limited to this.

  In the above description, the sheet bundle transport unit 350 has shown the bowl-shaped mounting unit 351. However, a planar trapezoidal mounting unit can also be used. In this case, the flat trapezoidal placement portion may be provided with a convex portion that matches the fold of the sheet bundle.

DESCRIPTION OF SYMBOLS 100 Image forming apparatus 101 Control part 102 Communication part 103 Operation display part 130 Image data memory | storage part 140 Image processing part 150 Image formation part 200 Reverse conveyance apparatus 201 Control part 202 Communication part 210 Conveyance part 220 Inversion part 230 Matching part 300 Paper processing apparatus 301 Control Unit 302 Communication Unit 310 Sheet Bundle Conveying Unit 320 Folding Unit 330 Overlapping Unit 340 Saddle Stitching Unit 350 Sheet Bundle Conveying Unit 360 Sheet Bundle Holding Unit 400 Sheet Processing Device

Claims (13)

A fold forming a crease on the paper;
A sheet bundle conveying unit that conveys a sheet bundle in which a plurality of sheets of creases are overlapped by a placing unit; and
A sheet bundle holding unit that holds the sheet bundle conveyed by the sheet bundle conveying unit against the placement unit;
A control unit that determines a sheet bundle conveyance speed, which is a conveyance speed of the sheet bundle by the sheet bundle conveyance unit, based on a state of the sheet bundle, and determines whether or not the sheet bundle holding unit is pressed.
A paper processing apparatus. The sheet bundle conveying unit conveys the sheet bundle in a state in which an inferior angle portion of the fold of the sheet is supported by the placing unit;
The sheet bundle pressing unit presses the sheet bundle against the mounting unit during the transport along with the transport of the sheet bundle placed on the mounting unit.
The sheet processing apparatus according to claim 1. The control unit determines the sheet bundle conveyance speed with reference to the number of sheets, the amount of paper, and the sheet size that form the sheet bundle;
The sheet processing apparatus according to claim 1, wherein: The control unit includes a necessary conveyance time required for the reciprocation of the sheet bundle conveying unit determined according to the sheet bundle conveying speed, and a time during which the number of sheets constituting the sheet bundle is supplied to the sheet bundle conveying unit. And when the required transport time is larger than the transport time interval, the sheet bundle pressing unit controls the sheet bundle to be pressed, and the sheet bundle transport speed is set to the high speed side. Change to high-speed paper bundle transport speed,
The sheet processing apparatus according to claim 1, wherein the sheet processing apparatus is a sheet processing apparatus. The controller is
A conveyance time interval as a time required for reciprocation of the sheet bundle conveyance unit determined according to the sheet bundle conveyance speed and a time when the number of sheets constituting the sheet bundle is supplied to the sheet bundle conveyance unit And
If the required conveyance time is longer than the conveyance time interval, the high-speed conveyance required time required for the reciprocation of the sheet bundle conveyance unit when the sheet bundle conveyance speed is changed to the high-speed sheet bundle conveyance speed on the high speed side is calculated. Seeking
If the required high-speed transfer time is greater than the transfer time interval, the required transfer time and the required high-speed transfer time are compared to determine which is smaller,
When the required conveyance time is smaller than the required high-speed conveyance time, the sheet bundle conveying unit is controlled to convey the sheet bundle at the sheet bundle conveying speed,
When the required high-speed conveyance time is shorter than the required time for conveying the sheet bundle, the sheet bundle is conveyed by the sheet bundle conveying unit at the high-speed sheet bundle conveying speed while suppressing the sheet bundle by the pressing unit. Control,
The sheet processing apparatus according to claim 1, wherein the sheet processing apparatus is a sheet processing apparatus. When the control unit is either a setting that emphasizes the quality of the sheet bundle in paper processing or a setting that emphasizes the quietness during processing of the paper bundle in paper processing, the control unit Control not to perform the press,
The sheet processing apparatus according to claim 1, wherein the sheet processing apparatus is configured as described above. The control unit suppresses the sheet pressing when neither the setting that emphasizes the quality of the sheet bundle in sheet processing or the setting that emphasizes the quietness during the processing of the sheet bundle is set in the sheet processing. Control to perform pressing of the part,
The sheet processing apparatus according to claim 1, wherein the sheet processing apparatus is configured as described above. A folding section for forming a crease in the sheet, a sheet bundle conveying section for conveying a sheet bundle in which a plurality of the sheets having the creases formed are stacked, and the sheet bundle conveyed by the sheet bundle conveying section A sheet bundle pressing unit that presses against the placement unit, and a control method of a sheet processing apparatus comprising:
Determining a sheet bundle conveyance speed, which is a conveyance speed of the sheet bundle by the sheet bundle conveyance unit, based on the state of the sheet bundle, and determining whether or not the sheet bundle holding unit is pressed,
The sheet bundle conveying section conveys the sheet bundle at the sheet bundle conveying speed without pressing the sheet bundle by the sheet bundle pressing section, or the sheet bundle while pressing the sheet bundle by the sheet bundle pressing section. Switching whether the conveyance unit conveys the sheet bundle at a high-speed sheet bundle conveyance speed higher than the sheet bundle conveyance speed;
Paper processing device control method. A conveyance time interval as a time required for reciprocation of the sheet bundle conveyance unit determined according to the sheet bundle conveyance speed and a time when the number of sheets constituting the sheet bundle is supplied to the sheet bundle conveyance unit When the required conveyance time is longer than the conveyance time interval, the sheet bundle pressing unit is controlled to hold the sheet bundle, and the sheet bundle conveyance speed is set to the high-speed sheet bundle conveyance speed. change,
The sheet processing apparatus control method according to claim 8. A folding section for forming a crease in the sheet, a sheet bundle conveying section for conveying a sheet bundle in which a plurality of the sheets having the creases formed are stacked, and the sheet bundle conveyed by the sheet bundle conveying section A sheet bundle pressing unit that presses against the placement unit, and a control method of a sheet processing apparatus comprising:
A sheet bundle conveyance speed, which is a conveyance speed of the sheet bundle by the sheet bundle conveyance unit, is determined based on the state of the sheet bundle;
A conveyance time interval as a time required for reciprocation of the sheet bundle conveyance unit determined according to the sheet bundle conveyance speed and a time when the number of sheets constituting the sheet bundle is supplied to the sheet bundle conveyance unit And
When the required transport time is longer than the transport time interval, the sheet bundle transport speed is changed to a high-speed sheet bundle transport speed, and the sheet bundle transport is performed while pressing the sheet bundle by the sheet bundle pressing unit. A section is controlled to convey the sheet bundle at the high-speed sheet bundle conveyance speed;
Paper processing device control method. A conveyance time interval as a time required for reciprocation of the sheet bundle conveyance unit determined according to the sheet bundle conveyance speed and a time when the number of sheets constituting the sheet bundle is supplied to the sheet bundle conveyance unit And
If the required conveyance time is longer than the conveyance time interval, the high-speed conveyance required time required for the reciprocation of the sheet bundle conveyance unit when the sheet bundle conveyance speed is changed to the high-speed sheet bundle conveyance speed is obtained. ,
If the required high-speed transfer time is greater than the transfer time interval, the required transfer time and the required high-speed transfer time are compared to determine which is smaller,
When the required conveyance time is smaller than the required high-speed conveyance time, the sheet bundle conveying unit is controlled to convey the sheet bundle at the sheet bundle conveying speed,
When the time required for high-speed conveyance is smaller than the time required for conveyance of the sheet bundle, the sheet bundle conveyance unit is controlled to convey the sheet bundle at the high-speed sheet bundle conveyance speed while suppressing the sheet bundle by the pressing unit. To
The method for controlling a sheet processing apparatus according to claim 8, wherein the sheet processing apparatus is controlled. If either the setting that places importance on the quality of the sheet bundle in paper processing or the setting that places importance on the quietness when processing the paper bundle in paper processing, the pressing of the paper holding section is not executed. Control,
The sheet processing apparatus control method according to claim 8, wherein the sheet processing apparatus is controlled. If neither the setting that emphasizes the quality of the sheet bundle in the paper processing or the setting that emphasizes the quietness during the processing of the paper bundle is set in the paper processing, the pressing of the paper pressing unit is executed. To control,
The sheet processing apparatus control method according to claim 8, wherein the sheet processing apparatus is controlled.