JP5910038B2 - Post-processing method and post-processing apparatus - Google Patents

Description

  The present invention relates to position control in a post-processing apparatus for a sheet on which an image is formed.

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

  For example, it is possible to perform saddle stitch binding by stapling a fold portion of a bundle of sheets in which the sheets are folded in the middle of the sheet. Further, it is possible to perform a spine processing that applies pressure to the back portion of the saddle-stitched sheet bundle with a roller or the like to create a spine cover portion by making a corner crease so as to resemble the saddle stitching.

  Further, as a pre-processing for making a crease, a crease process is performed at a position where a crease is to be made using a creasing device called a creaser. Then, by performing the folding process after the creasing process, there is an advantage that it is possible to prevent the folds from expanding even if the folding process is performed in a state where a plurality of sheets are collected.

  Such a scoring process is proposed in the following patent document.

JP 2008-105316 A

  In the case of the streak, a convex portion (swelled portion) is formed by a curved surface at the streak position, so the paper length in the direction perpendicular to the streak is slightly shortened and appears to be contracted. For this reason, if folding processing or stapling processing is performed after the creasing processing, the position control of the paper cannot be dealt with, and there is a problem that the position of the streaks and the position of folding or stapling are slightly shifted. In addition, when a plurality of streaks are added, the deviation may be further increased.

  However, in the above-described Patent Document 1, no countermeasure is taken for the sheet position control between the creasing process and the subsequent process.

  The present invention has been made in view of such a problem, and a post-processing method and a post-processing capable of executing accurate paper position control when another post-processing is performed on a sheet that has been subjected to scoring processing. An object is to provide a processing apparatus.

  That is, the present invention for solving the above-described problems is as follows.

(1) In the present invention this, during the post-processing in the post-processing apparatus having a position control member for controlling the position of the sheet, and a control unit for controlling a control state by the position control member, streaks on the paper Control is performed so as to change the position of the sheet in a direction orthogonal to the streak between the case where is attached and the case where the streak is not attached to the paper.

The position control member is an alignment member that adjusts the position of the paper from the end of the paper and aligns the paper. When the paper is streaked and when the paper is not streaked And controlling to change the position when aligning the end of the sheet parallel to the streak with the alignment member.

( 2 ) Further , according to the present invention, in the post-processing in the post-processing apparatus having a position control member that controls the position of the paper and a control unit that controls a control state by the position control member, Position control is performed so as to change the position of the sheet in a direction perpendicular to the streak when the streak is added and when the streak is not added to the paper, and a separate process is performed after the paper position control. When the position control member is applied, control is performed to change the position controlled by the position control member in accordance with the number of lines existing between the construction position of the separate processing and the edge of the sheet. .

( 3 ) Further, according to the present invention, in the post-processing in the post-processing apparatus including a position control member that controls the position of the paper and a control unit that controls a control state by the position control member, The position control is performed so as to change the position of the sheet in the direction perpendicular to the streak when the sheet is not and the streak is not added to the sheet, and another process is performed after the position control of the sheet. In the case of applying, if the streak does not exist between the construction position of the separate processing and one end parallel to the streak, the position controlled by the position control member is set on the one end side. Control is performed in the same manner as when the muscle does not exist.
(4) In the above (1) to (3), when the paper is streaked, control is performed to change the position controlled by the position control member according to the paper type. It is characterized by.

  According to the present invention, the following effects can be obtained.

  In the present invention, during post-processing in the post-processing apparatus, the position of the sheet in the direction orthogonal to the streak is changed depending on whether the sheet has a streak or the sheet has no streak. Since the position control member is controlled, it is possible to perform accurate sheet position control when another post-processing is performed on the sheet subjected to the creasing process.

  The position control member is an alignment member that aligns and aligns the position of the sheet from the edge of the sheet. The position control member is a line that has a streak between when the sheet is streaked and when the sheet is not streaked. By controlling to change the position when aligning the parallel paper edges with the alignment member, when another post-processing is performed on the paper that has been subjected to scoring processing, it is accurate according to the amount of paper shortened by the streaks. Paper position control can be executed.

  In addition, when the paper is streaked, the amount of shortening varies depending on the paper type by controlling to change the position controlled by the position control member according to the paper type. However, when another post-processing is performed on the sheet that has been subjected to the scoring process, accurate sheet position control can be executed even if the sheet type changes.

  In addition, when performing another process after alignment as the paper position control, the position controlled by the position control member is changed according to the number of streaks existing between the position where the separate process is performed and the paper edge. By controlling so as to perform accurate paper position control when another post-processing is performed on the paper subjected to the creasing process, regardless of the number of lines.

  In addition, when another process is performed after alignment as the paper position control, if there is no streak between the position of the separate process and one end parallel to the streak, By controlling the position controlled by the position control member in the same way as when there are no streaks, it is possible to accurately control the position of the paper even when controlling only the distance from the edge, such as staples and punches. Become.

It is a block diagram which shows the structure of the post-processing apparatus of embodiment of this invention. It is a block diagram which shows the structure of the post-processing apparatus of embodiment of this invention. It is a block diagram which shows the structure of the principal part of the post-processing apparatus of embodiment of this invention. It is a block diagram which shows the structure of the principal part of the post-processing apparatus of embodiment of this invention. It is a block diagram which shows the structure of the principal part of the post-processing apparatus of embodiment of this invention. It is a block diagram which shows the structure of the principal part of the post-processing apparatus of embodiment of this invention. It is explanatory drawing which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a block diagram which shows the structure of the principal part of the post-processing apparatus of embodiment of this invention. It is explanatory drawing which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is explanatory drawing which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a block diagram which shows the structure of the principal part of the post-processing apparatus of embodiment of this invention. It is explanatory drawing which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the post-processing apparatus of embodiment of this invention. It is explanatory drawing which shows operation | movement of the post-processing apparatus of embodiment of this 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]
With reference to FIGS. 1 and 2, the configuration of an image forming system including a post-processing apparatus according to the present embodiment will be described. As shown in FIGS. 1 and 2, the image forming system includes an image forming apparatus 100, a post-processing apparatus 300, and a post-processing apparatus 400. Note that another apparatus may exist between the image forming apparatus 100 and the post-processing apparatus 300, or the post-processing apparatus 400 may not exist.

  The image forming apparatus 100 includes a control unit 101 that controls each unit in the image forming apparatus 100 and controls the entire system as a post-processing device, a communication unit 102 that communicates with other connected devices, 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 107 that transports the fed and image-formed paper at a predetermined speed, and scans the document to generate image data A document reading unit 120 for performing image formation, a storage unit 130 for storing image data and various types of data used when forming an image, and various types of image processing necessary for image formation An image processing unit 140 to be executed, 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 post-processing apparatus 300 at the subsequent stage.

  The post-processing apparatus 300 is connected to the subsequent stage of the image forming apparatus 100, and includes a control unit 301 that controls each unit in the post-processing apparatus 300, a communication unit 302 for communicating with the image forming apparatus 100, a control program, A storage unit 304 that stores various setting data and is used as a work area for a control program, a discharge path selection unit 305 that selects a discharge path for discharging a post-processed sheet bundle, and a transport that transports a sheet at a predetermined speed A section 307, a scoring section 310 for scoring the entire paper without folding, a matching section 320 as a position control section for controlling the position of the scoring paper by matching for the next post-processing, and the paper A folding unit 330 that is folded in half or in three, a stacking unit 340 that stacks sheets of paper for post-processing and forms a sheet bundle, and a unit that is folded at the folding unit 330 In addition, the saddle stitching portion 350 for performing saddle stitching as post-processing, the square back processing portion 360 for performing square back processing for flattening the back folding portion of the sheet bundle on which the folds for saddle stitching are formed, and the saddle stitched paper And a cutting unit 370 that cuts the edge portion of the bundle.

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

  In the perspective view of FIG. 2, the configuration of the main part of the image forming system is schematically shown. When the post-processing device 400 performs post-processing on a sheet that has been image-formed by the image forming unit 150 in the image forming apparatus 100 and is transported in the X-direction in FIG. Transport to.

  On the other hand, when post-processing is executed in the post-processing device 300, as shown in FIG. 2, after the Y-direction streaks are made by the creasing section 310, the Y-direction is folded in the Y-direction at the folding section 330, and the Y-direction is formed. , The saddle stitching unit 340 and the saddle stitching unit 350 perform the saddle stitching and then the saddle stitching unit 360 performs the saddle stitching. By performing the processing, the execution efficiency of the post-processing is increased, and the productivity of the image forming system can be improved.

  1 and 2 is an example of an image forming system, and is not limited to such connection and conveyance direction.

〔basic action〕
3 and 4 are cross-sectional configuration diagrams showing the basic configuration of the creasing portion 310 called a creaser in the XZ plane.

  Here, when the creasing process is executed by the creasing unit 310, the sheet conveyed from the image forming apparatus 100 to the creasing unit 310 is drawn into the reverse conveying path 307R, and the conveying rollers 307R11, 307R12, 307R21, The sheet is stopped in a state where it is regulated at a predetermined position by nipping and conveying control by 307R22, stop position control by the leading end stopper 3251, or both nipping and conveying control and stop position control (FIG. 3). Note that the paper positioning may be performed using a paper passing sensor (not shown).

  After that, the creasing knife 312 driven by the creasing knife driving unit 311 and extending in the Y direction extends in the −X direction toward the creasing base 313 having a concave portion similarly extending in the Y direction. The sheet is sandwiched between the tip of the creasing knife 312 and the recess of the creasing base 313. By this operation, a streak whose longitudinal direction is the Y direction is formed (FIG. 4). In this scoring process, the sheet as a whole is maintained in a flat state, so that a streak is formed on the sheet on the plane, unlike the folds formed by the folding process.

  Further, during the creasing process, the nipping and conveying control by the conveying rollers 307R11, 307R12, 307R21 and 307R22, the stop position control of the leading end stopper 3251, or both the nipping and conveying control and the stop position control are performed on the sheet. One or a plurality of lines can be attached at a desired position. In addition, the sheet with the stripes is conveyed toward the folding unit 330 by returning to the reverse conveyance path 307R by nipping and conveying control by reverse rotation of the conveyance rollers 307R11, 307R12, 307R21, and 307R22.

  5 to 6 are cross-sectional configuration diagrams showing the basic configuration of the folding unit 330 in the post-processing apparatus 300 in the XZ plane. Here, as shown in FIG. 5, the sheet conveyed from the creasing section 310 to the folding section 330 is conveyed in the folding section 330 at a predetermined speed by the conveyance rollers 3311 and 3312 and the conveyance rollers 3321 and 3322.

  When folding is performed by the folding unit 330, as shown in FIG. 6A, the alignment member 3211 as a position control member driven by the alignment control unit 3212 is driven to the alignment standby position, and this alignment member The sheet 3211 stops in a state where the leading edge of the sheet is regulated at a predetermined position. Thereafter, the alignment member 3221 as a position control member driven by the alignment control unit 3222 is moved to the alignment position as shown in FIG. 6B, and the trailing edge of the sheet is aligned at a predetermined position by the alignment member 3221. Stop in state.

  In the case of FIG. 6, it is assumed that the center of the sheet is folded halfway. As shown in the plan view of FIG. 7, the alignment member 3211 has a predetermined alignment amount x1, and the alignment member 3221 has a predetermined alignment amount. By performing x2 alignment, the center of the sheet and the alignment center are matched.

  Thereafter, the folding knife 3350 driven by the folding knife driving unit 3351 extends in the Z direction between the folding rollers 3341 and 3342, whereby the sheet is sandwiched between the folding rollers 3341 and 3342, and a fold is formed.

  At this time, the folding rollers 3341 and 3342 are rotatable. Then, the folding knife 3350 is raised after a predetermined time set by the timer and then stopped, and the driving roller 3343 drives the folding roller 3342 in a direction to return the sheet and the folding knife 3350. The folding unit 330 can execute not only the middle folding for folding the center of the sheet for saddle stitching but also the three folding for folding the two places on the sheet.

  In FIG. 2 to FIG. 4, the creasing portion 310 is provided in the reverse conveyance path 307, but is not limited to this. For example, the creasing portion 310 is arranged at any position in the transport path, and the paper is positioned by temporarily stopping the transport roller or finely adjusting the forward / reverse in the transport path for transporting the paper. It is also possible to execute the attaching process.

[Prerequisite problems]
By the way, when a line is placed, a convex part (a raised part) is formed by a curved surface at the position of the line, so that the sheet length in the direction orthogonal to the line is slightly shortened and appears to be contracted in the plane part. It becomes a state.

  FIG. 8 shows a state in which the sheet that has been slightly shortened in the X direction by being crooked in the Y direction has been conveyed to the folding unit 330. Here, since the streak having the Y direction as the longitudinal direction is attached to the sheet on the XY plane, the sheet is shortened in the X direction orthogonal to the Y direction.

  The state of FIG. 8 is shown in the plan view of FIG. In FIGS. 8 and 9, a predetermined alignment amount x1 by the alignment member 3211 and a predetermined alignment by the alignment member 3221 are performed in the same manner as in FIGS. The quantity x2 is matched.

  In the case of FIGS. 8 and 9, the sheet center that has been scored by the creasing section 310 and the alignment center that has been aligned by the alignment section 320 do not coincide with each other. Cannot crease.

  Although the case of the folding process after the creasing process is illustrated here, the same problem occurs when the stapling process or the punching process is performed after the creasing process.

[Operation of Embodiment]
Hereinafter, the operation of the present embodiment will be described with reference to the flowcharts in FIG. Here, the case where the post-processing apparatus 300 in the image forming system in the connected state shown in FIGS. 1 and 2 performs the creasing process and the folding process will be mainly described.

  When image formation is started, the control unit 301 of the post-processing apparatus 300 receives the post-processing mode information from the control unit 101 and starts folding control.

  Here, as the alignment standby position movement control, the control unit 301 drives the alignment member 3211 as a position control member to the alignment standby position by the alignment control unit 3212 as shown in FIG. Thus, the leading edge of the sheet is stopped in a state where it is regulated at a predetermined position (step S101 in FIG. 10).

  Note that the alignment member 3211 on the leading end side of the sheet in the transport direction determines an alignment standby position for stopping the sheet, and waits at the alignment standby position before the arrival of the sheet. On the other hand, an alignment member 3221 on the rear end side of the sheet in the transport direction, which will be described later, performs an alignment operation so that the sheet abuts against the alignment member 3211 at the front end after arrival of the sheet.

(Paper edge side alignment standby position movement control)
Hereinafter, the alignment standby position movement control (step S101 in FIG. 10) will be described with reference to the flowchart of FIG. First, the control unit 301 determines whether or not creasing is selected for a sheet to be folded (step S201 in FIG. 11), and when creasing is selected for a sheet to be folded. (YES in step S201 in FIG. 11), it is determined whether the post-processing is based on the muscle center reference (step S202 in FIG. 11). Here, the post-processing of the line center reference means post-processing that requires different alignment control from the normal (no line selection) from both ends of the paper in the direction parallel to the line.

  Here, in the case of post-processing for a sheet not selected for alignment (NO in step S201 in FIG. 11), a normal alignment standby position without alignment is obtained, and the alignment member 3211 is moved to the alignment standby position. It is moved (step S203 in FIG. 11).

  In addition, when the post-processing of the paper with the line selection is YES (YES in step S201 in FIG. 11) and the post-processing of the line center reference (YES in step S202 in FIG. 11), it corresponds to the line condition. The alignment standby position is obtained, and the alignment member 3211 is moved to the alignment standby position (step S204 in FIG. 11).

  Note that the post-processing of the sheet with line selection is YES (YES in step S201 in FIG. 11), and if it is not post-processing of the line center reference (NO in step S202 in FIG. 11), that is, staple, punch, etc. In the case of the one-side reference post-processing, since there is no streak that causes shortening between the subsequent processing position and the alignment end position, the alignment standby position without alignment is obtained and the alignment member 3211 is aligned. Move to the standby position (step S203 in FIG. 11).

  Here, it is post-processing of the sheet not selected for alignment (NO in step S201 in FIG. 11), and the alignment member 3211 is moved to the normal alignment standby position without alignment (step S203 in FIG. 11). Will be described with reference to FIG. It should be noted that the alignment member 3211 to the normal alignment standby position in the case where the line is selected (YES in step S201 in FIG. 11) and is not post-line center reference postprocessing (NO in step S202 in FIG. 11). The movement (step S203 in FIG. 11) will also be described with reference to FIG.

  The control unit 301 refers to the post-processing mode information from the control unit 101 and acquires the paper size (step S2031 in FIG. 12). The control unit 301 also acquires information on the direction of the stripe from the post-processing mode information, and acquires the paper size in the direction orthogonal to the line. Further, the control unit 301 calculates a movement amount x1 from the initial position to the alignment standby position for the alignment member 3211 (step S2032 in FIG. 12). As shown in FIG. 6, the initial position of the alignment member 3211 means a position (home position) where the alignment member 3211 is retracted so as not to interfere with the conveyance of the paper. Then, the control unit 301 moves the alignment member 3211 from the initial position to the alignment standby position based on the calculated movement amount x1 (step S2033 in FIG. 12, FIG. 6 (1), FIG. 7 (1), FIG. 13 (1), step S203 in FIG. 11). In FIG. 13, the staples ST1 and ST2 are scheduled on the side closer to the alignment standby position as post-processing, and there are no streaks that cause shortening between the subsequent processing position and the alignment standby position. The same alignment standby position is obtained.

  On the other hand, in the case of a sheet with a line selection (YES in step S201 in FIG. 11) and post-processing of the line center reference (YES in step S202 in FIG. 11), the alignment standby position corresponding to the line condition is set. The movement of the alignment member 3211 (step S204 in FIG. 11) will be described with reference to FIG.

  The control unit 301 refers to the post-processing mode information from the control unit 101 and acquires the paper size (step S2041 in FIG. 14). The control unit 301 also acquires information on the direction of the stripe from the post-processing mode information, and acquires the paper size in the direction orthogonal to the line. Further, the control unit 301 refers to the number of streaks, the paper type, and the like to calculate the amount of paper shortening due to the streaks (step S2042 in FIG. 14).

  In this embodiment, the amount of shortening means that the sheet length in the direction perpendicular to the streak is shortened in the plane portion of the sheet due to a curved surface formed on the sheet due to the streak, and this shortening amount. Yes.

  The calculation of the shortening amount (step S2042 in FIG. 14) will be described with reference to the flowchart of FIG. First, the control unit 301 refers to the post-processing mode information and acquires the number of lines added to the sheet (step S401 in FIG. 15). Further, the control unit 301 refers to the post-processing mode information or the image formation information, and acquires the paper type of the processing target paper (step S402 in FIG. 15). Then, the control unit 301 determines the amount of shortening of the paper from the number of lines and the paper type (step S403 in FIG. 15).

  As the shortening amount determination process (step S403 in FIG. 15), if the paper is a normal paper of normal thickness (“plain paper (normal thickness)” in step S4031 in FIG. 16), for example, a streak 1 The shortening amount per book is set to 0.5 mm (step S4032 in FIG. 16), and the shortening amount for one sheet is determined by multiplying the shortening amount by the number of lines (step S4035 in FIG. 16). If the paper is thick (“thick paper” in step S4031 in FIG. 16), for example, the shortening amount per streak is set to 1.0 mm (step S4033 in FIG. 16), and the number of streaks is included in this shortening amount. To determine the shortening amount for one sheet (step S4035 in FIG. 16). If the sheet is thin (“thin paper” in step S4031 in FIG. 16), for example, the amount of shortening is set to 0.2 mm per line (step S4034 in FIG. 16), the number of lines is included in this amount of shortening. To determine the shortening amount for one sheet (step S4035 in FIG. 16). Note that thick paper, plain paper, and thin paper are relative and can be freely determined in the environment of use. Also, the shortening amount per line can be arbitrarily determined according to the paper to be used.

  The above is the shortening amount calculation (step S2042 in FIG. 14), and the control unit 301 calculates the muscle center reference movement amount x1 ′ from the initial position to the alignment standby position for the alignment member 3211 (step in FIG. 14). S2043).

  The calculation of the movement amount based on the muscle center reference (step S2043 in FIG. 14) will be described with reference to the flowchart of FIG. First, similarly to step S2032 in FIG. 12, the control unit 301 calculates a normal movement amount x1 from the initial position to the alignment standby position for the alignment member 3211 (step S501 in FIG. 17). Then, the control unit 301 uses the amount of shortening of the paper determined from the number of streaks and the paper type in step S403 in FIG. 15 to calculate the standby movement amount + (shortening amount determination / 2) as the center reference movement amount. x1 ′ is calculated (step S502 in FIG. 17).

  Then, the control unit 301 moves the alignment member 3211 from the initial position to the alignment standby position based on the calculated muscle center reference movement amount x1 ′ (step S2044 in FIG. 14, FIG. 18 (1), FIG. 19 (1), step S204 in FIG. 11).

  The above description is the alignment standby position movement control by the control unit 301 on the front end side of the sheet in step S101 in FIG.

[Screase processing]
When the alignment member 3211 is in a standby state at a predetermined position as described above and a sheet passing sensor (not shown) detects that the sheet has been conveyed (YES in step S102 in FIG. 10). If scoring is selected as post-processing (YES in step S103 in FIG. 10), the control unit 301 drives the scoring unit 310 to set a predetermined number of sheets at a predetermined position on the sheet as described in FIG. A streak is added (step S104 in FIG. 10). If scoring is not selected as post-processing (NO in step S103 in FIG. 10), the process proceeds to the next process without scoring.

[Alignment control of the trailing edge of the paper]
As shown in FIG. 6B, the control unit 301 drives the alignment member 3221 as a position control member to the alignment position by the alignment control unit 3222 as the folding unit alignment operation, and the alignment member 3211 whose tip is in a predetermined standby position. By controlling the rear end of the paper in the state restricted by the operation to be pushed by the alignment member 3221, the paper is controlled to be in a predetermined position (step S105 in FIG. 10). That is, the alignment member 3221 on the trailing edge side of the sheet in the transport direction performs an alignment operation from the trailing edge side of the sheet so that the sheet abuts against the alignment member 3211 at the leading edge after arrival of the sheet.

  Hereinafter, the matching operation control (step S105 in FIG. 10) will be described with reference to the flowchart of FIG. First, the control unit 301 determines whether or not creasing is selected for a sheet to be folded (step S301 in FIG. 20), and when creasing is selected for a sheet to be folded. Is determined (YES in step S301 in FIG. 20), it is determined whether the post-processing is based on the muscle center reference (step S302 in FIG. 20). Here, the post-processing of the line center reference means post-processing that requires different alignment control from the normal (no line selection) from both ends of the paper in the direction parallel to the line.

  Here, in the case of post-processing for a sheet that has not been selected for alignment (NO in step S301 in FIG. 20), a normal alignment position without alignment is obtained and the alignment member 3221 is aligned (FIG. 20). 20 step S303).

  In addition, when the post-processing of the paper with the line selection is YES (YES in step S301 in FIG. 20) and the post-processing of the line center reference (YES in step S302 in FIG. 20), it corresponds to the line condition. An alignment position is obtained, and the alignment member 3221 is aligned (step S304 in FIG. 20).

  Note that the post-processing of the sheet with the line selection is YES (YES in step S301 in FIG. 20), and if it is not post-processing of the line center reference (NO in step S302 in FIG. 20), that is, staple, punch, etc. In the case of the one-side reference post-processing, the alignment position of the one-side reference is obtained, and the alignment member 3221 is aligned (step S305 in FIG. 20).

  Here, the post-processing of the sheet not selected for scoring (NO in step S301 in FIG. 20) and the normal aligning operation of the aligning member 3221 without scoring (step S303 in FIG. 20) will be described with reference to FIG. Will be described with reference to FIG.

  The control unit 301 refers to the post-processing mode information from the control unit 101 and acquires the paper size in the direction orthogonal to the streak (step S3031 in FIG. 21). Further, the control unit 301 calculates a movement amount x2 from the initial position to the alignment position for the alignment member 3221 (step S3032 in FIG. 21). As shown in FIG. 6, the initial position of the alignment member 3221 means a position (home position) where the alignment member 3221 is retracted so as not to interfere with the conveyance of the sheet. Then, the control unit 301 performs the alignment operation by moving the alignment member 3221 from the initial position based on the calculated movement amount x2 (step S3033 in FIG. 21, FIG. 6 (2), FIG. 7 (2)). , Step S303 in FIG.

  On the other hand, the alignment operation of the alignment member 3221 of the line center reference in the case of the post-processing of the line center reference (YES in step S302 in FIG. 20) on the sheet with line selection (YES in step S301 in FIG. 20). (Step S304 in FIG. 20) will be described with reference to FIG.

  The control unit 301 refers to the post-processing mode information from the control unit 101 and acquires the paper size in the direction orthogonal to the stripe (step S3041 in FIG. 22). Further, the control unit 301 refers to the number of streaks, the paper type, and the like to calculate the amount of paper shortening due to the streaks (step S3042 in FIG. 22). The calculation of the shortening amount is as already described with reference to the flowcharts of FIGS. Further, similarly to step S3032 in FIG. 21, the control unit 301 calculates a movement amount x2 from the initial position to the alignment position for the alignment member 3221 (step S3043 in FIG. 22). Then, using the shortening amount calculated as described above, the control unit 301 sets the muscle center reference movement amount x2 ′ from the initial position to the alignment position for the alignment member 3221 as the alignment movement amount x2 + (shortening amount / 2). (Step S3044 in FIG. 22). Then, the control unit 301 moves the alignment member 3221 from the initial position based on the calculated alignment movement amount x2 ′ based on the muscle center (step S3044 in FIG. 22, FIG. 18 (2)). 19 (2), step S304 in FIG. 20).

  Further, in the case of a sheet with a line selection (YES in step S301 in FIG. 20) and not after the line center reference (NO in step S302 in FIG. 20), that is, after one-side reference such as stapling or punching. The one-side reference matching operation (step S305 in FIG. 20) in the case of processing will be described with reference to FIG.

  The control unit 301 refers to the post-processing mode information from the control unit 101, and acquires the paper size in the direction orthogonal to the line (step S3051 in FIG. 23). Furthermore, the control unit 301 refers to the number of streaks, the paper type, and the like to calculate the amount of paper shortening due to the streaks (step S3052 in FIG. 23). The calculation of the shortening amount is as already described with reference to the flowcharts of FIGS. Further, similarly to step S3032 in FIG. 21, the control unit 301 calculates the movement amount x2 from the initial position to the alignment position for the alignment member 3221 (step S3053 in FIG. 23). Then, using the shortening amount calculated as described above, the control unit 301 calculates the muscle center reference movement amount x2 ″ from the initial position to the alignment position for the alignment member 3221 as the alignment movement amount x2 + shortening amount ( 23, the control unit 301 performs the alignment operation by moving the alignment member 3221 from the initial position based on the calculated alignment movement amount x2 ″ based on the muscle center (in FIG. 23). Step S3054, FIG. 13 (2), Step S305 in FIG. 20). In this case, since the stapling process is performed on the alignment standby position side of the front end, position correction corresponding to the shortening amount is performed on the alignment position side of the rear end.

  The above description is the control by the control unit 310 regarding the alignment operation on the paper birth side in step S105 in FIG.

[Folding]
As described above, the control unit 301 causes the folding unit 330 to execute a folding process on the sheet in which the leading edge standby position and the trailing edge alignment position are controlled in accordance with the presence or absence of the streak (step S106 in FIG. 10). .

  In this embodiment, the alignment member 3211 as a position control member is configured to change the position of the sheet in a direction orthogonal to the streak depending on whether the sheet has a streak or not. And 3221 are controlled, the folding process can be performed on the sheet subjected to the creasing process without misalignment.

[Other Embodiments (1)]
In FIG. 13 shown as a specific example of the one-side reference process such as the staple process or the punch process, the staples ST1 and ST2 are scheduled on the leading end side (alignment standby position side) in the transport direction as post-processing. For this reason, since the streak causing the shortening is located on the rear end side with respect to the staple position, the same correction standby position on the front end side and the position correction corresponding to the shortening amount are performed on the alignment position side on the rear end.

  On the other hand, as shown in FIG. 24, as another example of the one-side reference processing, when the staples ST1 and ST2 are scheduled on the rear end side (alignment position side) in the transport direction as post-processing, this causes shortening. Since the streak is on the leading end side with respect to the staple position, position correction x1 ″ (x1 + shortening amount) corresponding to the shortening amount may be performed on the leading end side, and the same alignment amount x2 may be controlled on the trailing end side.

[Other embodiment (2)]
In the above specific example, the alignment members 3211 and 3221 perform alignment standby and alignment operation with a movement amount corresponding to the presence or absence of a streak from the retracted position. However, the present invention is not limited to this. For example, the retracted position may be changed according to the presence or absence of a streak, and the amount of movement during alignment standby or alignment operation may be constant. In any case, by appropriately controlling the position of the sheet in the direction orthogonal to the streak according to the presence or absence of the streak, various post-processing can be performed without misalignment.

[Other embodiment (3)]
Further, in the above embodiment, in the image forming system that transports the paper on which the image is formed in the X direction, the half-folded or saddle stitched paper is transported in the Y direction. However, the present invention is not limited to this. Alternatively, the half-folded or saddle-stitched paper may be conveyed in the X direction, or may be conveyed in the middle direction between X and Y.

DESCRIPTION OF SYMBOLS 100 Image forming apparatus 101 Control part 102 Communication part 103 Operation display part 104 Storage part 105 Paper feed part 107 Conveyance part 120 Original reading part 130 Storage part 140 Image processing part 150 Image forming part 300 Post-processing apparatus 301 Control part 302 Communication part 307 Conveying section 310 creasing section 320 aligning section 330 folding section 340 superposition section 350 saddle stitching section 360 square back processing section 370 cutting section 400 post-processing device

Claims (8)

A position control member for controlling the position of the paper;
A post-processing method in a post-processing apparatus comprising a control unit that controls a control state by the position control member,
The position control member is an alignment member that aligns and aligns the position of the sheet from the end of the sheet,
The position when aligning the end of the sheet parallel to the streak with the alignment member is changed depending on whether the sheet has a streak or the sheet does not have the streak. And position control by the position control member so as to change the position of the paper in the direction orthogonal to the streaks,
And a post-processing method. A position control member for controlling the position of the paper;
A post-processing method in a post-processing apparatus comprising a control unit that controls a control state by the position control member,
Position control is performed by the position control member so as to change the position of the paper in a direction perpendicular to the streak when the paper is streaked and when the paper is not streaked,
When performing another process after the position control of the sheet, the position controlled by the position control member is changed according to the number of lines existing between the position where the separate process is performed and the edge of the sheet. To control,
Postprocessing how to characterized in that. A position control member for controlling the position of the paper;
A post-processing method in a post-processing apparatus comprising a control unit that controls a control state by the position control member,
Position control is performed by the position control member so as to change the position of the paper in a direction perpendicular to the streak when the paper is streaked and when the paper is not streaked,
When performing another process after the position control of the paper, if the streak does not exist between the position of the separate process and one end parallel to the streak, the one end side Controlling the position controlled by the position control member in the same manner as when the muscle does not exist,
Postprocessing how to characterized in that. If the paper is streaked, control to change the position controlled by the position control member according to the paper type,
The post-processing method as described in any one of Claims 1-3 characterized by the above-mentioned. A position control member for controlling the position of the paper;
A control unit for controlling a control state by the position control member;
A post-processing apparatus comprising:
The position control member is an alignment member that aligns and aligns the position of the sheet from the end of the sheet,
The controller is configured to align the end of the sheet parallel to the streak with the alignment member when the sheet has a streak and when the sheet is not streaked. To change the position when the position of the end of the paper parallel to the streak is controlled by the position control member,
Post-processing apparatus you wherein a. A position control member for controlling the position of the paper;
A control unit for controlling a control state by the position control member;
A post-processing apparatus comprising:
The controller is
The position when the position control member controls the position of the end of the sheet parallel to the streak is changed between the case where the streaks are attached to the paper and the case where the streaks are not attached to the paper. Control and
When performing another process after the position control of the sheet, the position controlled by the position control member is changed according to the number of lines existing between the position where the separate process is performed and the edge of the sheet. To control,
Post-processing apparatus you wherein a. A position control member for controlling the position of the paper;
A control unit for controlling a control state by the position control member;
A post-processing apparatus comprising:
The controller is
The position when the position control member controls the position of the end of the sheet parallel to the streak is changed between the case where the streaks are attached to the paper and the case where the streaks are not attached to the paper. Control and
When performing another process after the position control of the paper, if the streak does not exist between the position of the separate process and one end parallel to the streak, the one end side Controlling the position controlled by the position control member in the same manner as when the muscle does not exist,
Post-processing apparatus you wherein a. The control unit performs control so as to change the position controlled by the position control member in accordance with the paper type when the paper is streaked.
The post-processing apparatus according to any one of claims 5 to 7 ,

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