JP2011042442A - Sheet folding device and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet folding device and an image forming device achieving optimal stack performance corresponding to a condition on folding processing. <P>SOLUTION: This sheet folding device ejects paper by a paper ejecting roller by applying predesignated folding processing by sandwiching a received sheet member by folding roller pairs, and has a control part for controlling a carrying speed of the paper ejecting roller in response to the condition on predetermined folding processing (for example, a kind of folding, a size of a sheet member, the opening direction in stacking of the sheet member, the number of stacked sheet members and stack accuracy) and a parameter preset in response to respective conditions. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sheet folding apparatus that folds a sheet member discharged from an image forming apparatus such as a copying machine or a printing machine, and more specifically, folding in two, folding in three, folding in three outside, Z folding, four folding, and kannon folding. The present invention relates to a sheet folding apparatus and an image forming apparatus that perform various types of folding processes such as the above.

  A sheet folding device (sheet post-processing device, paper post-processing device) that folds a sheet member (paper) discharged from an image forming apparatus such as a copying machine or a printing machine is known. In this sheet folding apparatus, as the folding process, various types of folding processes such as two-fold, inner three-fold, outer three-fold, Z-fold, four-fold, and kannon folding are performed. Examples of the sheet folding apparatus include the following.

  In Patent Document 1 (Japanese Patent Laid-Open No. 2008-37618), the drive of the half-fold discharge roller is stopped or decelerated, and the sheet is made to wait at the position of the half-fold discharge roller, thereby causing a stacking failure with a simple configuration. A sheet post-processing apparatus for preventing is disclosed.

  Patent Document 2 (Japanese Patent No. 3214656) corresponds to a folding mode in which origami is included in a sheet bundle moved by a bundle conveying unit and a non-folding mode in which no origami is present. A sheet post-processing apparatus is disclosed that controls the moving speed in the folding mode to be set lower than the moving speed in the non-folding mode.

  However, in a sheet folding apparatus that transports a sheet member, stacks it, and then stacks (stacks), since the folded portion exists in the sheet member, the folded portion swells, and the stacking property in the stack portion decreases. There is a problem of performing (loading failure, stacking failure).

  In Patent Document 1, the sheet member is stopped at the discharge roller portion to shorten the stacking time and prevent the stacking failure. However, the conditions regarding the folding process (for example, the type and size of folding) are mentioned. Absent. Also in Patent Document 2, although the sheet member conveyance speed is changed depending on whether or not the sheet bundle folding mode is present, there is no mention of the conditions related to folding.

  In recent years, in sheet folding apparatuses, enhancement of functions has been demanded due to diversification of applications, and the type and size of folding of sheet members have become complicated, and optimum stack processing according to each condition is required. For example, if the number of types of folding of the sheet member increases, the way in which the folded portion swells differs depending on the type of folding, so the angle of the sheet member when stacking changes, and stacking defects are likely to occur.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a sheet folding apparatus and an image forming apparatus capable of realizing an optimum stacking property corresponding to a folding process condition.

  In order to achieve such an object, the sheet folding apparatus of the present invention performs a predetermined folding process by sandwiching a received sheet member between a pair of folding rollers, and discharges the sheet by a discharge roller. It has a control part which controls the conveyance speed of a discharge roller according to the condition about folding processing determined beforehand, and the parameter preset corresponding to every condition, It is characterized by the above-mentioned.

  Further, in the sheet folding apparatus of the present invention, the conditions regarding the folding process include the type of folding process, the size of the sheet member to be folded, the opening direction when the folded sheet member is stacked, and the stacking after the folding process. It is at least one of the number of sheet members and stacking accuracy.

  In the sheet folding apparatus of the present invention, when the type of folding processing is determined to be Z-folding as a condition related to folding processing, the control unit performs a discharge roller according to a parameter set in advance corresponding to Z-folding. The pulse period of the paper discharge roller motor that drives the paper is controlled to increase the transport speed of the paper discharge roller.

  Further, in the sheet folding apparatus of the present invention, the control unit determines that as a condition regarding folding processing, the type of folding processing is determined to be Z-folding, and the number of sheet members stacked after folding processing is determined. The pulse period of the paper discharge roller motor that drives the paper discharge roller is controlled according to a parameter set in advance corresponding to the number of folded and determined sheets, and the conveyance speed of the paper discharge roller is increased.

  Further, in the sheet folding apparatus of the present invention, the control unit is preset corresponding to the three-fold or four-fold when the folding process type is determined to be three-fold or four-fold as a condition regarding the folding process. According to the parameter, the pulse cycle of the paper discharge roller motor that drives the paper discharge roller is controlled to reduce the conveyance speed of the paper discharge roller.

  Further, in the sheet folding apparatus of the present invention, the control unit determines the folding process type to be three-fold or four-fold, and the number of sheet members to be stacked after folding is determined as a condition for folding. In this case, the pulse cycle of the paper discharge roller motor for driving the paper discharge roller is controlled according to the parameters set in advance corresponding to the three-fold or four-fold and the determined number of sheets, and the transport speed of the paper discharge roller is decreased. It is characterized by that.

  In the sheet folding device according to the present invention, when a predetermined stack accuracy is determined as a condition related to the folding process, the control unit discharges the discharge roller according to a parameter set in advance corresponding to the determined stack accuracy. The pulse period of the paper discharge roller motor for driving the paper is controlled to change the conveyance speed of the paper discharge roller.

  The sheet folding apparatus according to the present invention is characterized in that it is connected to the image forming apparatus on the upstream side and receives a sheet member printed by the image forming apparatus.

  The image forming apparatus of the present invention includes the sheet folding apparatus of the present invention.

  According to the present invention, it is possible to provide a sheet folding apparatus and an image forming apparatus capable of realizing an optimum stacking property corresponding to the conditions related to folding.

It is a figure which shows the whole layout of the sheet folding apparatus which is one Embodiment of this invention. It is a figure which shows the example of the kind of folding which can be performed with the sheet folding apparatus which is one Embodiment of this invention. It is the figure which expanded the principal part of the sheet folding apparatus which is one Embodiment of this invention, and demonstrates a part of flow of the folding process of 2 folds, 3 outer folds, 3 inner folds, 4 simple folds, and 4 Kannon. FIG. It is the figure which expanded the principal part of the sheet folding apparatus which is one Embodiment of this invention, and demonstrates a part of flow of the folding process of 2 folds, 3 outer folds, 3 inner folds, 4 simple folds, and 4 Kannon. FIG. It is the figure which expanded the principal part of the sheet folding apparatus which is one Embodiment of this invention, and is a figure explaining a part of flow of the folding process of 2 folds. It is the figure which expanded the principal part of the sheet folding apparatus which is one Embodiment of this invention, and is a figure explaining a part of flow of the folding process of 2 folds. It is the figure which expanded the principal part of the sheet folding apparatus which is one Embodiment of this invention, and is a figure explaining a part of flow of the folding process of Z folding. It is the figure which expanded the principal part of the sheet folding apparatus which is one Embodiment of this invention, and is a figure explaining a part of flow of the folding process of Z folding. It is the figure which expanded the principal part of the sheet folding apparatus which is one Embodiment of this invention, and is a figure explaining a part of flow of the folding process of Z folding. It is the figure which expanded the principal part of the sheet folding apparatus which is one Embodiment of this invention, and is a figure explaining a part of flow of the folding process of Z folding. FIG. 10 is an image diagram illustrating an example of a state when a sheet member that has been Z-folded is discharged and stacked. FIG. 10 is an image diagram illustrating an example of a state when a sheet member that has been Z-folded is discharged and stacked when the number of stacks is large. FIG. 10 is an image diagram illustrating an example of a state when a sheet member that has been folded in three is discharged and stacked. FIG. 10 is an image diagram illustrating an example of a state when a sheet member that has been folded in three is discharged and stacked when the number of stacks is large. It is a block diagram which shows the structural example which concerns on the control function of the sheet folding apparatus which is one Embodiment of this invention. It is the figure which expanded the principal part of the sheet folding apparatus which is one Embodiment of this invention, and is a figure explaining a part of flow of the folding process of outer three fold, inner three fold, simple four fold, and kannon four fold. . It is the figure which expanded the principal part of the sheet folding apparatus which is one Embodiment of this invention, and is a figure explaining the flow of the folding process of a kannon four fold.

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

  A sheet folding apparatus according to an embodiment of the present invention is an apparatus that folds a sheet member discharged from an image forming apparatus such as a copying machine or a printing machine. FIG. 1 is a diagram showing an overall layout of the sheet folding apparatus according to the present embodiment. As shown in FIG. 1, the sheet folding apparatus of the present embodiment includes a first conveyance path 101, a second conveyance path 102, a third conveyance path 103, a fourth conveyance path 104, a fifth conveyance path 105, and a sixth conveyance path. 106, seventh conveying path 107, first skew roller 108, second skew roller 109, guide 110, first folding roller 201, second folding roller 202, third folding roller 203, fourth folding roller 204, first nip. 205, second nip 206, third nip 207, first switching claw 301, second switching claw 302, third switching claw 303, fourth switching claw 304, folding blade 401, tapping roller 501, jogger 502, first stopper 601, a second stopper 602, a third stopper 603, a stacker 700, and a paper discharge roller 800. Further, FIG. 1 shows the receiving position and the discharging position of the sheet member.

  With the configuration shown in FIG. 1, the sheet folding apparatus according to the present embodiment can perform various folding processes (folding, folding operation, folding mode) of the sheet member. An example of the types of folding processing possible with the sheet folding apparatus of the present embodiment is shown in FIG. FIG. 2 shows the state of the sheet member and the number of times of folding for each type of folding (Z-folding, 2-folding, 3-folding outside, 3-folding inside, 4-fold folding simply, 4-fold folding).

  Hereinafter, the operation of each bending process shown in FIG. 2 will be described.

<Fold in half>
First, with reference to FIGS. 3 to 6, the folding process of two folds will be described. 3 to 6 are enlarged views of the main part of the sheet folding apparatus of the present embodiment shown in FIG. 1, and are diagrams for explaining the flow of folding processing in two.

  First, as shown in FIG. 3, the sheet member received in the sheet folding apparatus is conveyed to the second conveyance path 102 by the first switching claw 301 and the second switching claw.

  Thereafter, the sheet member is conveyed to the third conveyance path 103. A movable first stopper 601 is configured in the third conveyance path 103. The position of the first stopper 601 is controlled so that the folding position is appropriate for each paper size.

  Next, as shown in FIG. 4, the front end of the sheet member hits the first stopper 601 and is continuously conveyed, so that the vicinity of the first folding roller 201 and the second folding roller 202 (portion surrounded by a broken line) Thus, the sheet member is deflected.

  Next, as shown in FIG. 5, the first folding is performed by the deflection passing between the first folding roller 201 and the second folding roller 202. Thereby, the folding is completed.

  Next, as shown in FIG. 6, for example, the sheet member folded in two is conveyed through the fourth conveyance path 104 and then discharged to the outside of the sheet folding apparatus. Although not shown, the folded sheet member may be discharged to the stacker 700.

<Z-fold>
Next, with reference to FIGS. 7 to 10, the Z-folding process will be described. 7 to 10 are enlarged views of the main part of the sheet folding apparatus of the present embodiment shown in FIG. 1, and are diagrams for explaining the flow of the Z-fold folding process.

  First, as shown in FIG. 7, the sheet member received in the sheet folding apparatus is conveyed to the first conveyance path 101 by the first switching claw 301 and the second switching claw.

  Next, as shown in FIG. 8, the leading edge of the sheet member passes between the first folding roller 201 and the second folding roller 202.

  Thereafter, the sheet member is conveyed to the fourth conveyance path 104. A movable second stopper 602 is configured in the fourth transport path 104. The position of the second stopper 602 is controlled so that the folding position is appropriate for each paper size.

  Next, as shown in FIG. 9, the front end of the sheet member hits the second stopper 602 and is continuously conveyed, so that the vicinity of the second folding roller 202 and the third folding roller 203 (portion surrounded by a broken line) Then deflection occurs. The first folding is performed by the deflection passing through the nipping between the second folding roller 202 and the third folding roller 203.

  Thereafter, the sheet member is conveyed to the fifth conveyance path 105 with the first folded portion as a leading end. A movable third stopper 603 is configured in the fifth conveyance path 105. The position of the third stopper 603 is controlled so that the folding position is appropriate for each paper size.

  Next, as shown in FIG. 10, the folded portion of the sheet member hits the third stopper 603 and is continuously conveyed, so that the vicinity of the third folding roller 203 and the fourth folding roller 204 (the portion surrounded by the broken line) ) Causes deflection. The second folding is performed by the deflection passing between the third folding roller 203 and the fourth folding roller 204. Thereby, Z folding is completed.

<Outer 3 fold, Inner 3 fold, Simple 4 fold>
The outer three folds, the inner three folds, and the simple four folds proceed to FIG. 16 after passing through FIGS. 3 and 4 described above. FIG. 16 is an enlarged view of a main part of the sheet folding apparatus of the present embodiment shown in FIG. 1, and is a diagram for explaining the flow of folding processing of outer three-fold, inner three-fold, and simple four-fold.

  First, as shown in FIG. 3, the sheet member received in the sheet folding apparatus is conveyed to the second conveyance path 102 by the first switching claw 301 and the second switching claw.

  Thereafter, the sheet member is conveyed to the third conveyance path 103. A movable first stopper 601 is configured in the third conveyance path 103. The position of the first stopper 601 is controlled so that the folding position is appropriate for each paper size.

  Next, as shown in FIG. 4, the front end of the sheet member hits the first stopper 601 and is continuously conveyed, so that the vicinity of the first folding roller 201 and the second folding roller 202 (portion surrounded by a broken line) Thus, the sheet member is deflected. When the deflection passes through the nipping between the first folding roller 201 and the second folding roller 202, the first folding is performed.

  Thereafter, the sheet member is conveyed to the fourth conveyance path 104. A movable second stopper 602 is configured in the fourth transport path 104. The position of the second stopper 602 is controlled so that the folding position is appropriate for each paper size.

  Next, as shown in FIG. 16, the front end of the sheet member hits the second stopper 602 and is continuously conveyed, so that the vicinity of the second folding roller 202 and the third folding roller 203 (portion surrounded by a broken line) Then deflection occurs. The second folding is performed when the deflection passes between the second folding roller 202 and the third folding roller 203. Thereby, folding is completed.

<Four folds of Kannon>
The four-folded kannon is passed through FIG. 3, FIG. 4 and FIG. 16, and then proceeds to FIG. FIG. 17 is an enlarged view of the main part of the sheet folding apparatus according to the present embodiment shown in FIG.

  First, as shown in FIG. 3, the sheet member received in the sheet folding apparatus is conveyed to the second conveyance path 102 by the first switching claw 301 and the second switching claw.

  Thereafter, the sheet member is conveyed to the third conveyance path 103. A movable first stopper 601 is configured in the third conveyance path 103. The position of the first stopper 601 is controlled so that the folding position is appropriate for each paper size.

  Next, as shown in FIG. 4, the front end of the sheet member hits the first stopper 601 and is continuously conveyed, so that the vicinity of the first folding roller 201 and the second folding roller 202 (portion surrounded by a broken line) Thus, the sheet member is deflected. When the deflection passes through the nipping between the first folding roller 201 and the second folding roller 202, the first folding is performed.

  Thereafter, the sheet member is transported to the fourth transport path 104 with the first folded portion as a tip. A movable second stopper 602 is configured in the fourth transport path 104. The position of the second stopper 602 is controlled so that the folding position is appropriate for each paper size.

  Next, as shown in FIG. 16, the front end of the first folding portion of the sheet member hits the second stopper 602 and is continuously conveyed, so that the vicinity of the second folding roller 202 and the third folding roller 203 ( Deflection occurs in the area surrounded by the broken line. The second folding is performed when the deflection passes between the second folding roller 202 and the third folding roller 203.

  Thereafter, the sheet member is conveyed to the fifth conveyance path 105 with the second folded portion as a leading end. A movable third stopper 603 is configured in the fifth conveyance path 105. The position of the third stopper 603 is controlled so that the folding position is appropriate for each paper size.

  Next, as shown in FIG. 17, the folding portion of the second folding portion of the sheet member hits the third stopper 603 and is continuously conveyed, so that the vicinity of the third folding roller 203 and the fourth folding roller 204 Deflection occurs at the part enclosed by the broken line. The third folding is performed when the deflection passes through the nipping between the third folding roller 203 and the fourth folding roller 204. Thereby, folding is completed.

  As described above, various bending processes that can be performed by the sheet folding apparatus according to the present embodiment have been described. After the folding is completed, the operation is performed as follows in FIG. That is, when the fourth switching claw 304 is at the position indicated by the solid line in FIG. 1, the sheet member that has been folded in any one shown in FIG. 2 is conveyed to the sixth conveyance path 106. Thereafter, as an example of discharge to the outside of the sheet folding apparatus, the sheet is guided to the post-processing apparatus, specified processing is performed, and the sheet is discharged onto the tray of the post-processing apparatus (see FIG. This will be described later with reference to FIG. Alternatively, the sheet member in which any folding shown in FIG. 2 is completed is conveyed to the seventh conveyance path 107 when the fourth switching claw 304 is at the position indicated by the broken line in FIG. Thereafter, the sheet is guided to the stacker 700 by the seventh conveyance path 107.

  Next, the control function of the sheet folding apparatus of the present embodiment will be described with reference to FIG. FIG. 15 is a block diagram illustrating a configuration example relating to a control function of the sheet folding apparatus according to the present embodiment.

  As shown in FIG. 15, the sheet folding apparatus of the present embodiment is connected to an image forming apparatus and can communicate. When each condition regarding the folding process is selected and determined by the image forming apparatus, the control unit of the sheet folding apparatus discharges the sheet discharge roller 800 according to a parameter set in advance corresponding to the determined condition. Controls the roller motor. The conditions relating to the folding process include, for example, the type of folding of the sheet member, the size of the sheet member to be folded, the opening direction when the folded sheet member is stacked, and the number of sheet members to be folded and stacked. (Hereinafter referred to as the number of stacks), stack accuracy, etc. (at least one of these is selected and determined in advance). In addition, for example, the pulse cycle of the paper discharge roller motor is determined in advance for each of the above conditions, and the parameters are stored in advance in a memory in the control unit. Thereby, the pulse cycle of the paper discharge roller motor is controlled, and the conveyance speed of the sheet member is changed. As described above, the sheet folding apparatus according to the present embodiment can improve the stacking property without using a new stack member by controlling the conveyance speed of the paper discharge roller according to the conditions related to the folding process. Therefore, it is possible to realize an optimum stacking property corresponding to the conditions related to folding. Note that the sheet folding apparatus of the present embodiment may be configured to be built in the image forming apparatus.

  Hereinafter, specific control examples of the control unit of the sheet folding apparatus will be described.

  FIG. 11 is an image diagram illustrating an example of a state when a sheet member (Z-folded sheet material) that has been Z-folded is discharged and stacked. As shown in FIG. 11, when the folding type of the sheet member to be stacked is Z-folding, the leading end portion of the sheet member hangs down and the angle of the sheet member changes, so that stacking is likely to occur. Therefore, when Z-folding is selected, the control unit shown in FIG. 15 controls the pulse cycle of the discharge roller motor according to the parameter (value) corresponding to Z-folding, and discharges the sheet member by increasing the conveyance speed. . Thereby, stack failure can be prevented and stackability can be improved.

  FIG. 12 is an image diagram illustrating a state example when a sheet member (Z-folded sheet material) that has been Z-folded is discharged and stacked. As shown in FIG. 12, in the case of Z-folding, as the number of stacks increases, the height of the front end portion of the sheet member becomes higher than that of the rear end portion. Therefore, when Z-folding is selected and the number of stacks is large, the control unit shown in FIG. 15 controls the pulse cycle of the discharge roller motor according to the parameter corresponding to the Z-folding and the designated number of stacks, and the conveyance speed. Is made faster (faster than when only Z-folding is selected) to discharge the sheet member. Thereby, stack failure can be prevented and stackability can be improved.

  FIG. 13 is an image diagram showing an example of a state when a sheet member (tri-fold sheet material) that has been folded in three (outer three or inner three) is discharged and stacked. As shown in FIG. 13, when the sheet is folded in three, the length of the stacked sheet member is shortened. For this reason, when the sheet member is discharged at a high speed, the discharged sheet member exceeds the stack position, which is likely to cause a stack failure. Therefore, when the three-folding is selected, the control unit shown in FIG. 15 controls the pulse cycle of the discharge roller motor according to the parameter corresponding to the three-folding, and discharges the sheet member by slowing the conveyance speed. Thereby, stack failure can be prevented and stackability can be improved. Note that the case of four folds (simple four folds or Kannon four folds) is the same as the above three folds.

  FIG. 14 is an image diagram illustrating an example of a state when a sheet member (tri-fold sheet material) that has been folded in three (outer three or inner three) is discharged and stacked. As shown in FIG. 14, in the case of three folding, as the number of stacks increases, the height of the sheet discharge roller is reached quickly, and stacking is likely to occur. Therefore, when the three-fold is selected and the number of stacks is large, the control unit shown in FIG. 15 controls the pulse cycle of the sheet discharge roller motor according to the parameter corresponding to the three-fold and the specified number of stacks, and the conveyance speed The sheet member is discharged at a later time (slower than when only three-folding is selected). Thereby, stack failure can be prevented and stackability can be improved. Note that the case of four folds (simple four folds or Kannon four folds) is the same as the above three folds.

  Since how the sheet member swells at the time of stacking differs depending on the size of the sheet member, the angle of the sheet member at the time of stacking changes, and stacking defects are likely to occur. Therefore, the control unit shown in FIG. 15 controls the pulse cycle of the paper discharge roller motor in accordance with the parameter corresponding to the designated size of the sheet member, and discharges the sheet member by optimizing the conveyance speed. Thereby, stack failure can be prevented and stackability can be improved.

  Depending on the opening direction of the sheet member at the time of stacking, the angle of the sheet member at the time of stacking is changed, and stacking defects are likely to occur. Therefore, the control unit shown in FIG. 15 controls the pulse cycle of the paper discharge roller motor according to the parameter corresponding to the opening direction of the sheet member at the time of stacking, and discharges the sheet member with the optimum conveyance speed. Thereby, stack failure can be prevented and stackability can be improved.

  Depending on the number of stacks, the landing position of the sheet member changes, and stacking defects are likely to occur. Therefore, the control unit shown in FIG. 15 controls the pulse cycle of the paper discharge roller motor in accordance with the parameter corresponding to the designated number of stacks, and discharges the sheet member with the optimum conveyance speed. Thereby, stack failure can be prevented and stackability can be improved.

  Note that the user can select the stack accuracy in the image forming apparatus. This stacking accuracy is classified in advance into, for example, “higher, normal, lower”. In this case, the control unit shown in FIG. 15 controls the pulse cycle of the paper discharge roller motor according to the parameter corresponding to the selected stack accuracy, and discharges the sheet member with the conveyance speed optimized. For example, when the stack accuracy “higher” is selected by the user, the control unit slows the conveyance speed. Instead, productivity will decline. Therefore, when the user wants to increase productivity, the user selects the stack accuracy “lower”. Thereby, a control part makes conveyance speed quick. However, the stack accuracy will be reduced.

  As mentioned above, although embodiment of this invention was described, it is not limited to the said embodiment, A various deformation | transformation is possible in the range which does not deviate from the summary.

  For example, the operation in the above-described embodiment can be executed by hardware, software, or a combined configuration of both.

  When executing processing by software, a program in which a processing sequence is recorded may be installed and executed in a memory in a computer incorporated in dedicated hardware. Or you may install and run a program in the general purpose computer which can perform various processes.

  For example, the program can be recorded in advance on a hard disk or a ROM (Read Only Memory) as a recording medium. Alternatively, the program is temporarily or permanently stored on a removable recording medium such as a CD-ROM (Compact Disc Read Only Memory), an MO (Magneto optical) disc, a DVD (Digital Versatile Disc), a magnetic disc, or a semiconductor memory. It can be stored (recorded). Such a removable recording medium can be provided as so-called package software.

  The program may be wirelessly transferred from the download site to the computer in addition to being installed on the computer from the removable recording medium as described above. Or you may wire-transfer to a computer via networks, such as LAN (Local Area Network) and the internet. The computer can receive the transferred program and install it on a recording medium such as a built-in hard disk.

  In addition to being executed in time series in accordance with the processing operations described in the above embodiment, the processing capability of the apparatus that executes the processing, or a configuration to execute in parallel or individually as necessary Is also possible.

  The present invention can be applied to a sheet post-processing apparatus of an image forming apparatus such as a copying machine or a printer.

101 1st conveyance path 102 2nd conveyance path 103 3rd conveyance path 104 4th conveyance path 105 5th conveyance path 106 6th conveyance path 107 7th conveyance path 110 Guide 108 1st skew roller 109 2nd skew roller 201 1st Folding roller 202 Second folding roller 203 Third folding roller 204 Fourth folding roller 205 First nip 206 Second nip 207 Third nip 301 First switching claw 302 Second switching claw 303 Third switching claw 304 Fourth switching claw 401 Folding blade 501 strike roller 502 jogger 601 first stopper 602 second stopper 603 third stopper 700 stacker 800 paper discharge roller

JP 2008-37618 A Japanese Patent No. 3214656

Claims (9)

In a sheet folding apparatus that performs a specified folding process by sandwiching the received sheet member between a pair of folding rollers, and ejects the sheet by a sheet ejection roller.
The sheet folding apparatus according to claim 1, further comprising a control unit configured to control a conveyance speed of the discharge roller according to a predetermined condition relating to the folding process and a parameter set in advance corresponding to each condition. apparatus.   The conditions related to the folding process include the type of folding process, the size of the sheet member to be folded, the opening direction when the folded sheet member is stacked, the number of sheet members stacked after folding, and the stacking accuracy. The sheet folding apparatus according to claim 1, wherein there is at least one. The controller is
As a condition for the folding process, when the type of folding process is determined to be Z-folding, the pulse cycle of the sheet discharge roller motor that drives the sheet discharge roller is controlled in accordance with parameters set in advance corresponding to Z-folding. The sheet folding apparatus according to claim 1, wherein a conveying speed of the paper discharge roller is increased. The controller is
As a condition regarding the folding process, when the type of folding process is determined to be Z-folding and the number of sheet members to be stacked after the folding process is determined, it is set in advance corresponding to the Z-folding and the determined number of sheets. 4. The method according to claim 1, wherein a pulse period of a paper discharge roller motor that drives the paper discharge roller is controlled according to a parameter that is set to increase a transport speed of the paper discharge roller. 5. Sheet folding device. The controller is
As a condition regarding the folding process, when the type of folding process is determined to be three-fold or four-fold, a discharge roller that drives the discharge roller in accordance with parameters set in advance corresponding to the three-fold or four-fold. 5. The sheet folding device according to claim 1, wherein the sheet pulse roller is controlled by controlling a pulse period of the motor to reduce a conveyance speed of the paper discharge roller. The controller is
As a condition regarding the folding process, when the type of folding process is determined to be three-fold or four-fold, and the number of sheet members to be stacked after the folding process is determined, the number of sheets is determined to be three-fold or four-fold. 6. The pulse speed of a paper discharge roller motor for driving the paper discharge roller is controlled according to a preset parameter correspondingly, and the transport speed of the paper discharge roller is slowed down. The sheet folding apparatus according to claim 1. The controller is
When a predetermined stack accuracy is determined as a condition regarding the folding process, a pulse cycle of a discharge roller motor for driving the discharge roller is controlled according to a parameter set in advance corresponding to the determined stack accuracy. The sheet folding apparatus according to claim 1, wherein a conveyance speed of the paper discharge roller is changed. Connected to the image forming device on the upstream side,
The sheet folding apparatus according to claim 1, wherein a sheet member printed by the image forming apparatus is received.   An image forming apparatus comprising the sheet folding device according to claim 1.

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