Medium processing device and image formation system

Abstract

To reduce in size of a medium processing device that performs binding processing on Z-folded sheets.SOLUTION: A medium processing device comprises: a medium stacking part on which sheet-like media after folding processing are stacked; a binding processing part which binds a medium bundle formed using the media; a medium mount part which mounts the medium bundle discharged from the medium stacking part; and an end cover part which can move to cover an end of one medium stacked precedently on the medium stacking part. When another medium to be conveyed after the one medium is conveyed toward the medium stacking part, the end cover part is located at a position where the end of the one medium is not covered with an end of the other medium not having predetermined position relation with the end of the one medium, and moves to the position where the end of the one medium is covered with the end of the other medium having the predetermined position relation with the end of the one medium.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a media processing device and an image forming system. [Background technology]

[0002] There are known media processing devices that perform a "binding process" to bind the edges of sheet-like media. There are also known media processing devices that perform a "folding process" to fold the media in a predetermined manner. Furthermore, there are known image forming devices that form images on sheet-like media and are equipped with such media processing devices.

[0003] It should be noted that sheet-like media may be made of various materials. In this specification, the sheet-like medium is assumed to be "paper," which is generally used widely for image formation, etc. Furthermore, a "paper stack" in which multiple sheets are stacked will be used as an example of a bundle of multiple sheets.

[0004] In a media processing device that binds a bundle of Z-folded sheets, when the edges of the Z-folded sheets are aligned and the sheets are transported to a media stacking section for binding, the open part of the Z fold may get caught on the discharge roller or end fence.

[0005] Patent document 1 discloses a configuration that adjusts the linear discharge speed based on the distance between discharge means when Z-folded sheets are discharged, the length of the Z-folded sheets, etc., in order to prevent the open fold from getting caught on the discharge rollers or end fence when transporting the Z-folded sheets to a tray that temporarily stacks them for binding processing. Summary of the Invention [Problem to be solved by the invention]

[0006] According to the conventional technique disclosed in Patent Document 1, when an attempt is made to reduce the size of the device using a Z-fold sheet discharge mechanism, if the positional relationship of the fold length and other factors becomes invalid, the problem of the opening of the Z-fold getting caught on the leading edge of the previously loaded sheet and the end fence remains.

[0007] The present invention aims to reduce the size of a media processing device that performs binding processing on Z-folded sheets. [Means for solving the problem]

[0008] In order to solve the above problem, one aspect of the present invention relates to a media processing device, characterized in that it comprises a media loading section for loading sheet-like media that have been folded, a binding processing section for binding the ends of a media stack formed by the media, a media stack discharge section for discharging the media stack, a media loading section for placing the discharged media stack, and an end cover section for covering the end of one medium when another medium that is transported after a medium that has been previously loaded on the media loading section is transported in the loading direction to the media loading section, and when the end of the one medium and the end of the other medium are in a predetermined positional relationship.

[0009] According to the present invention, it is possible to reduce the size of a media processing device that performs binding processing on Z-folded sheets. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram showing the overall configuration of an embodiment of an image forming system according to the present invention; [Figure 2] 10A to 10C are diagrams illustrating folding methods that can be performed by the folding device provided in the embodiment. [Figure 3] FIG. 2 is a functional configuration diagram showing an example of a control block according to the embodiment. [Figure 4] FIG. 2 is a diagram showing the internal structure of a post-processing device according to an embodiment. [Figure 5] FIG. 2 is an enlarged partial configuration diagram of the peripheral configuration of a medium stacking tray according to an embodiment. [Figure 6]FIG. 2 is an enlarged partial configuration diagram of the peripheral configuration of a medium stacking tray according to an embodiment. [Figure 7] 10A and 10B are diagrams illustrating an example of the configuration of a cover member that covers an end of a medium according to an embodiment. [Figure 8] 10A and 10B are diagrams illustrating an operation of covering the edge of paper sheets stacked on a medium stack tray according to an embodiment. [Figure 9] 10A and 10B are diagrams illustrating a state after a medium has been folded according to an embodiment. [Figure 10] 3A and 3B are diagrams illustrating the correlation of the peripheral configuration of a medium stacking tray according to an embodiment. [Figure 11] 5A and 5B are diagrams illustrating an example of the arrangement of a cover member according to an embodiment. [Figure 12] 10 is a flowchart illustrating the flow of a binding process according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, an embodiment of an image forming system will be described. FIG. 1 is a diagram showing the overall configuration of an image forming system 100 as an embodiment. The image forming system 100 has a function of forming an image on paper P, which is an example of a sheet-like medium, and a function of performing predetermined processing (post-processing) on ​​the paper P on which the image has been formed. As shown in FIG. 1, the image forming system 100 includes an image forming device 101, a post-processing device 102 which corresponds to an embodiment of the media processing device according to the present invention, and a folding device 103 which performs folding processing.

[0012] The image forming apparatus 101 forms an image on a sheet P and discharges the sheet P with the image formed thereon to the folding device 103 or the post-processing device 102. The image forming apparatus 101 includes a tray in which the sheet P is stored, a transport unit that transports the sheet P stored in the tray, and an image forming unit that forms an image on the sheet P transported by the transport unit. The image forming unit may be of an inkjet type that ejects ink toward the sheet P to form an image, or may be of an electrophotographic type that deposits toner on the sheet P to form an image. The configuration of the image forming apparatus 101 is already well known, so a detailed description thereof will be omitted.

[0013] [Type of folding for paper P] 2 shows an example of a folding process that can be performed on the sheet P in the folding device 103. The folding device 103 can perform a plurality of folding methods, such as a Z-fold as shown in FIG. 2(a), a double fold as shown in FIG. 2(b), an outer tri-fold as shown in FIG. 2(c), and an inner tri-fold as shown in FIG. 2(e).

[0014] In the Z-fold illustrated in FIG. 2(a), for example, a first fold f1 is formed at a position approximately halfway along the length of the sheet P, and a second fold f2 is formed at a position approximately halfway along the length of the folded piece. In this type of folding, the sheet P takes on the shape of the letter Z. For convenience, one of the edges of the sheet P before the Z-fold, which is the edge to be bound, is referred to as the leading edge ef. The other edge of the sheet P before the Z-fold is referred to as the trailing edge eb. Therefore, the Z-folded sheet P has an opening between the second fold f2 and the piece of paper at the leading edge ef. There is also an opening between the first fold f1 and the trailing edge eb.

[0015] Similarly, in the case of paper P that has been folded in three on the outside as shown in Figure 2(c), there is an opening caused by the fold between the second fold f2 and the piece of paper at the leading edge ef, and there is also an opening caused by the fold between the first fold f1 and the trailing edge eb.

[0016] If a sheet P to be loaded later has an opening in the conveyance direction relative to a sheet P previously loaded in the medium loading section provided in post-processing device 102 (such as a Z-fold or an outer tri-fold), the subsequent sheet P may not be loaded in the correct positional relationship relative to the previously loaded sheet P. For example, the opening of another sheet P to be loaded later may be below the edge of a previously loaded sheet P, causing the opening to get caught on the previously loaded sheet P. In this case, when multiple sheets P are loaded in the medium loading section to form a sheet bundle Pb, a correct sheet bundle Pb cannot be formed, and the sheets will not be loaded in the correct positional relationship.

[0017] The post-processing device 102, which is an embodiment of a media processing device according to the present invention, has a main feature in that when multiple sheets of paper P that have been folded are stacked in the media stacking section, the edges of the previously stacked sheets of paper P are covered so that the positional relationship between the edges of one sheet of paper P and the other sheets of paper P is correct.

[0018] [Control Block] Fig. 3 is a schematic diagram of the control block provided in image forming system 100. As shown in Fig. 3, in the control configuration of image forming system 100, image forming apparatus 101, folding apparatus 103, and post-processing apparatus 102 are connected to each other so that they can communicate with each other. Post-processing apparatus 102 is provided with a post-processing control unit 104, and folding apparatus 103 is provided with a folding control unit 107.

[0019] Finishing control unit 104 and folding control unit 107 are computers having a CPU, a storage unit, a communication interface with image forming apparatus 101, etc. The storage units of finishing control unit 104 and folding control unit 107 are configured with ROM, RAM, etc., and store programs to be executed by the CPU, etc. Finishing control unit 104 and folding control unit 107 are connected to finishing detection unit 105 or folding detection unit 108, represented by a sensor that detects the presence or absence of paper P and the mechanical position, and finishing drive unit 106 or finishing drive unit 109, represented by a motor.

[0020] The post-processing control unit 104 (CPU) and the folding control unit 107 (CPU) operate the post-processing drive unit 106 or the post-processing drive unit 109 based on instructions sent from the image forming device 101 and information on the paper P and the status of each mechanism sent from the post-processing detection unit 105 or the folding detection unit 108 in accordance with a program stored in the memory unit, thereby performing paper alignment processing, binding processing, punching processing, folding processing, etc. on the paper P transported from the image forming device 101.

[0021] [Configuration and Operation of Post-Processing Device 102] Next, a description will be given of the configuration and operation of the post-processing device 102. The post-processing device 102 has a function of receiving sheets P from an upstream device (the image forming device 101 or the folding device 103) and performing predetermined processing (punching, binding, alignment, etc.). The following description will be given of the case where the post-processing device 102 receives sheets P that have been folded in the folding device 103 and performs binding.

[0022] The paper P conveyed from the folding device 103 is received by the entrance rollers 5. After the paper P passes through the conveyance rollers 6, the direction of conveyance of the paper P is switched by the branching claw 10 to either the proof tray 4 or the shift tray 16 serving as a medium loading section. When binding the paper P, the direction of the shift tray 16 is set as the conveyance direction.

[0023] In this case, the paper P to be bound is discharged in the direction of the shift tray 16, which serves as the medium loading section, by the conveying roller 11, which serves as the medium discharge section or medium bundle discharge section, and the paper P is conveyed in a switchback manner by the striking roller 14 so that the end of the paper P abuts against the reference fence 18. This aligns the end of the paper P to be bound.

[0024] In addition, in order to align the widthwise edges of the sheets P placed on the staple tray 15, the jogger fence 21 is pressed against the sheets P. This aligns the sheets P in the widthwise direction. When the number of sheets P placed on the staple tray 15 reaches a predetermined number (set number), the sheets are bound by the split staplers 20 and 22.

[0025] 5 is an enlarged partial configuration diagram of the peripheral configuration of the staple tray 15. The diagram illustrates an example of a paper discharge state when Z-folded paper P is loaded on the staple tray 15 and the distance between the conveying roller 11 and the discharge roller 12 is short.

[0026] 5, a first sheet of paper P1, which is one medium that is placed first on staple tray 15, is a Z-folded sheet of paper P. A second sheet of paper P2, which is another medium that is transported later, is also a Z-folded sheet of paper P. When second sheet of paper P2 is discharged by transport roller 11 and begins to be switched back and transported by tapping roller 14, second sheet of paper P2 may get caught on first sheet of paper P1 depending on the relative positions of second sheet of paper P2 and first sheet of paper P1.

[0027] Here, assume that when second sheet P2 is switched back and conveyed, the second opening OP2 between the second fold f2 of second sheet P2 and the piece of paper having the leading edge ef is located farther from the reference fence 18 than the position of the first opening OP1 between the first fold f1 and the trailing edge eb of first sheet P1. In this case, the second fold f2 of second sheet P2 is more likely to get caught in the first opening OP1 between the first fold f1 and the trailing edge eb of first sheet P1.

[0028] 6, the post-processing device 102 is provided with a leading edge guide 31 as an end cover part at the position of the discharge roller 12, which is movable to move in and out above the end of the staple tray 15. The leading edge guide 31 moves between a retracted position and a cover position by, for example, rotating about a rotation shaft 32. This rotation moves the leading edge guide 31 to a position where it covers the end (first fold f1 and trailing edge eb) of the Z-folded first sheet P1.

[0029] FIG. 6(b) illustrates an example in which the leading edge guide 31 covers the Z-folded second sheet P2 when it is discharged by the conveyance roller 11 and then switched back by the striking roller 14 toward the staplers 20 and 22, which have the reference fence 18. As shown in FIG. 6(b), the leading edge guide 31 covers the edge of the first sheet P1, so that the second fold f2 does not get caught on the first sheet P1 even when the first sheet P1 is discharged with the first open OP1 outside the folded portion (second fold f2) of the second sheet P2 and then switched back. That is, during the switchback transport, the second fold f2 comes into contact with the leading edge guide 31 and does not come into contact with the first sheet P1, allowing the switchback transport. As a result, the second sheet P2 can be prevented from getting caught on the first sheet P1.

[0030] 6, when Z-folded paper P is discharged from the conveyance rollers 11, the position of the shift tray 16 is moved to a position where the difference in level with the staple tray 15 is small. This causes the edge of the second paper P2 discharged from the conveyance rollers 11 to hang down, making it less likely to get caught on the first paper P1 when the paper P is switched back and conveyed. As a result, Z-folded paper P can be conveyed smoothly.

[0031] If paper P or a stack of paper Pb is already loaded on the shift tray 16, a media detection sensor (not shown) detects the position of the top surface of the shift tray 16, and based on this detection result, the shift tray 16 is controlled to change its vertical position so as to reduce the step between the top surface and the staple tray 15.

[0032] The material of the leading edge guide 31 is preferably one that has a small coefficient of friction and prevents contact between sheets of paper P. For example, as shown in Fig. 6, it is preferable that the leading edge guide 31 is made of a material that can be displaced by rotation or the like and has a small coefficient of friction, such as POM (polyoxymethylene).

[0033] [Example of tip guide 31] Next, an embodiment of the tip guide 31 will be described with reference to Fig. 7. Fig. 7(a) shows a configuration example in which a motor 33 is connected to a cam 35 via a belt 34, and the tip guide 31 is rotated by the movement of the cam 35. The tip guide 31 returns to the retracted position by the tension of a spring 36.

[0034] Figure 7(b) shows an example of a configuration in which a motor 33 is connected to a gear 37 via a belt 34, and the power of the gear 37 is transmitted to a gear 38, thereby rotating the tip guide 31 connected to the gear 38.

[0035] Figure 7(c) shows an example of a configuration in which a motor 33 is connected to a gear 37 via a belt 34, and the power of the gear 37 is transmitted to a rack gear 39, thereby moving the tip guide 31 connected to the rack gear 39 up and down.

[0036] FIG. 7(d) shows an example of a configuration in which the power of a motor 33 moves a leading end guide 31 connected to another belt via a belt .

[0037] FIG. 7(e) shows a configuration example in which the end is a rotation axis 32 and the tip guide 31 is rotated around the rotation axis 32 by a solenoid 40.

[0038] Comparing the configuration examples listed above, when moving the tip guide 31 between the retracted position and the cover position, the tip guide 31 is rotated around the rotation shaft 32 as a rotation center by, for example, a cam 35 or gears 37 and 38. In this case, it is considered that the closer the arrangement of the rotation shaft 32 and the tip guide 31 is, the less displacement there is of the tip guide 31 before and after retraction, and therefore it is more suitable for the retraction operation. Therefore, the following explanation is based on the configuration example shown in Figure 7(a).

[0039] Assume that first sheet P1, which has been Z-folded, is stacked on staple tray 15, and then second sheet P2, which has also been Z-folded, is transported in a switchback manner and placed on staple tray 15. In this case, as shown in Fig. 8, if the first fold f1 of second sheet P2 is in a predetermined positional relationship such that it does not extend beyond first sheet P1, then the leading edge guide 31 remains in the retracted state and second sheet P2 is transported in a switchback manner.

[0040] On the other hand, when the first sheet P1 is loaded on the staple tray 15 and the second sheet P2 is then switched back and transported to the staple tray 15, if the first fold f1 of the second sheet P2 is in a predetermined positional relationship such that it exceeds the first sheet P1, the leading edge guide 31 moves to the cover state and the second sheet P2 is switched back and transported.

[0041] As shown in Fig. 9, if the total length of the sheet P to be Z-folded is "Lp," the effective length (length in the conveying direction) of the sheet P after Z-folding is "Lp / 2," which is half of the total length Lp. Furthermore, the length of the piece of paper (folded portion) after the second fold is further halved, which is "Lp / 4."

[0042] Figure 10 shows an example in which "Lf" is the length from the position where the stapler 20, 22 performs the binding process on the paper P (which may also be the position where the paper P is aligned by the reference fence 18) to the position where the paper P does not interfere with the leading edge guide 31.

[0043] In this case, when the Z-folded paper P is placed on the staple tray 15, if the relationship "Lf < Lp / 2" is satisfied, there is a high possibility that no collision will occur between one sheet of paper P and other sheets of paper P stacked thereon later, so there is no need to move the leading guide 31.

[0044] On the other hand, if the relationship "Lf > Lp / २" is satisfied, there is a high possibility that a collision will occur between one sheet of paper P and other sheets of paper P, so the leading guide 31 is moved.

[0045] Therefore, the appearance and disappearance of the leading guide 31 are controlled according to the size and folding method of the paper P loaded on the staple tray 15.

[0046] It is assumed that information regarding the paper P is notified from the image forming apparatus 101 to the post-processing apparatus 10२. The notified information includes the size information of the paper P and the information indicating the type of folding process applied to the paper P. Therefore, in the post-processing apparatus 10२, based on this information, Lp is determined and the operation of the leading guide 31 is controlled. Similarly, the position of the shift tray 16 is also controlled in advance.

[0047] [Arrangement of the leading guide 31] FIG. 11 shows an example of the arrangement of the leading guide 31. As shown in FIG. 11, a plurality of leading guides 31 are arranged in the paper width direction which is the orthogonal direction with respect to the conveyance direction of the paper P. In this case, it is desirable that the plurality of leading guides 31 are arranged at positions corresponding to the vicinity of the width end portion of the paper P. This is because the positions where collisions of the paper P occur and where it is likely to get caught are the width end portions of the paper P.

[0048] [Operation control flow of the leading guide 31] Next, the flow of the binding process for the Z-folded paper P executed in the image forming system 100 will be described using the flowchart of FIG. 12. First, an instruction to start a printing process including predetermined content is given (S1201). Subsequently, it is determined whether or not the binding process is included in the printing instruction (S1202).

[0049] If the print instruction does not include binding (S1202: NO), the process proceeds to another processing mode (S1204). If the print instruction includes binding (S1202: YES), the process determines whether the print instruction includes Z-folding (S1203).

[0050] In step S1203, if the print command does not include Z-folding (S1203: NO), the paper P is transported to the staple tray 15 (paper reception) (S1209), and the flow from S1203 to S1211 is repeated until the number of sheets to be bound is reached (S1211: NO). Finally, binding is performed (S1212), and the paper stack Pb is discharged to the shift tray 16 (S1213).

[0051] In step S1203, if the print instruction includes Z-folding (S1203: YES), a process for moving the position of the shift tray 16 is executed (S1205). The position moving process in step S1205 refers to a process for aligning the position of the stacking surface of the shift tray 16 shown in FIG. 6 or the position of the top surface of the stack of sheets Pb placed on the shift tray 16 with the position of the staple tray 15. More specifically, it refers to a process for changing the position of the shift tray 16 to align these positions. This process reduces the difference in level between the top surface of the shift tray 16 and the stacking surface of the staple tray 15, making it easier to avoid collisions between sheets P.

[0052] Next, the length "Lf" of the sheet P is compared with the actual length "Lp / 2" of the Z-folded sheet P (S1206). If "Lf>Lp / 2" is satisfied in step S1206 (S1206: YES), the process proceeds to S1207. If "Lf>Lp / 2" is not satisfied in step S1206 (S1206: NO), the process proceeds to S1209.

[0053] In step S1207, the leading edge guide 31 is operated to move to a position that covers the edge of the paper P placed on the staple tray 15 (S1207). Next, the paper P is received (S1208). Specifically, in step S1208, an operation is performed to switchback and transport new paper P and stack it on the staple tray 15. Thereafter, the leading edge guide 31 is retracted (S1210). This makes it possible to maintain the alignment accuracy of the paper P.

[0054] The leading edge guide 31 extends and retracts regardless of the number of sheets P stacked on the staple tray 15 in order to prevent the Z-folded portion of the sheet P from getting caught on the discharge roller 12.

[0055] The flow from S1203 to S1211 is repeated until the number of sheets to be bound is reached (S1211), and finally, binding processing is performed (S1212), and the sheets are discharged onto the shift tray 16 (S1213).

[0056] The present invention is not limited to the above-described exemplary embodiments, and various modifications are possible without departing from the technical gist thereof. The present invention covers all technical matters included in the technical concept described in the claims. The above-described embodiments are preferred examples, but a person skilled in the art can realize various modifications from the disclosed content. Such modifications are also included in the technical scope described in the claims.

[0057] The control method described above may be realized, for example, by a program. That is, the control method is a method executed by a computer by causing an arithmetic unit, a storage unit, an input unit, an output unit, and a control unit to cooperate with each other based on the program. The program may be written to a storage unit or a storage medium and distributed, or distributed via a telecommunications line, etc.

[0058] For example, aspects of the present invention are as follows. <1> a medium stacking section on which folded sheet-like media are stacked; a binding processing unit that binds a medium bundle formed using the medium; a medium stacking section for stacking the medium bundle discharged from the medium stacking section; an end cover portion that is movable to cover an end of one of the media that has been previously loaded on the media loading portion; Equipped with The end cover portion is When another medium is transported after the one medium toward the medium stacking unit, When the edge of the other medium does not have a predetermined positional relationship with the edge of the one medium, the edge of the other medium is in a position that does not cover the edge of the one medium; When an edge of the other medium comes into a predetermined positional relationship with an edge of the one medium, the other medium moves to a position where it covers the edge of the one medium. The media processing device is characterized by the above. <2> The end cover part is When the edge of the one medium is placed on top of the edge of the other medium, the edge of the one medium is not covered by the other medium. When the predetermined relationship is a positional relationship in which the edge of the one medium is not placed on top of the edge of the other medium, the stacking member moves to a position covering the edge of the one medium. The aforementioned <1> 2 is a media processing device according to the first embodiment. <3> The end cover portion is when the predetermined relationship is a relationship in which the edge of the one medium is positioned above the second fold of the other medium, the moving member moves to a position that covers the edge of the one medium. The aforementioned <2> 2 is a media processing device according to the first embodiment. <4> (Equivalent to CL3) the end cover unit moves to a position covering the end of the one medium in accordance with the predetermined positional relationship determined in accordance with information on the type of fold applied to the one medium and the length of the one medium in the conveying direction after the folding process has been applied to the one medium; The aforementioned <1> and above <3> 1 is a media processing device according to any one of the preceding claims. <5> (Equivalent to CL2) the medium loading section is positioned so that when the other medium is transported in a direction in which the other medium is loaded on the medium loading section, either the position of the loading surface of the medium loading section or the position of the top surface of the medium or medium stack loaded on the medium loading section is lower than the upper surface of the medium loading section; The aforementioned <1> and the above <4> 1 is a media processing device according to any one of the preceding claims. <6> (Equivalent to CL4) A plurality of the end covers are arranged in the width direction of the medium. The aforementioned <1> and the above <5> 1 is a media processing device according to any one of the preceding claims. <7> the edge cover portion is displaceable between a position where it covers the edge of the other medium and a position where it does not cover the edge of the other medium; The aforementioned <1> and the above <6> 1 is a media processing device according to any one of the preceding claims. <8> the end cover portion is displaceable by rotating between a position where it covers the end of the other medium and a position where it does not cover the end of the other medium; The aforementioned <7> 2 is a media processing device according to the first embodiment. <9> the end cover portion is displaced up and down between a position where it covers the end of the other medium and a position where it does not cover the end of the other medium; The aforementioned <7> 2 is a media processing device according to the first embodiment. <10> an image forming device for forming an image on the medium; The method for binding a plurality of the media on which images have been formed by the image forming apparatus <1> and the above <9> a media processing device according to any one of The image forming system is characterized by comprising: [Explanation of symbols]

[0059] 11: Transport roller 12: Discharge roller 15: Staple tray 16: Shift tray 18: Reference fence 31: Tip guide 100: Image forming system 101: Image forming device 102: Post-processing device 103: Folding device 104: Post-processing control unit 105: Post-processing detection unit 106: Post-processing drive unit 107: Folding control section 108: Folding detection unit [Prior art documents] [Patent documents]

[0060] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-263452

Claims

1. a medium stacking section on which folded sheet-like media are stacked; a binding processing unit that binds a medium bundle formed using the medium; a medium stacking section for stacking the medium bundle discharged from the medium stacking section; an end cover portion that is movable to cover an end of one of the media that has been previously loaded on the media loading portion; Equipped with The end cover portion is When another medium is transported after the one medium toward the medium stacking unit, When the edge of the other medium does not have a predetermined positional relationship with the edge of the one medium, the edge of the other medium is in a position that does not cover the edge of the one medium; When an edge of the other medium comes into a predetermined positional relationship with an edge of the one medium, the other medium moves to a position where it covers the edge of the one medium. A media processing device characterized by:

2. The end cover part is When the edge of the one medium is placed on top of the edge of the other medium, the edge of the one medium is not covered by the other medium. When the predetermined relationship is a positional relationship in which the edge of the one medium is not placed on top of the edge of the other medium, the stacking member moves to a position covering the edge of the one medium. The media processing device of claim 1 .

3. The end cover portion is when the predetermined relationship is a relationship in which the edge of the one medium is positioned above the second fold of the other medium, the moving member moves to a position that covers the edge of the one medium. The media processing device of claim 2 .

4. the end cover unit moves to a position covering the end of the one medium in accordance with the predetermined positional relationship determined in accordance with information on the type of fold applied to the one medium and the length of the one medium in the conveying direction after the folding process has been applied to the one medium; The media processing device of claim 1 .

5. the medium loading section is positioned so that when the other medium is transported in a direction in which the other medium is loaded on the medium loading section, either the position of the loading surface of the medium loading section or the position of the top surface of the medium or medium stack loaded on the medium loading section is lower than the upper surface of the medium loading section; The media processing device of claim 1 .

6. A plurality of the end covers are arranged in the width direction of the medium. The media processing device of claim 1 .

7. the edge cover portion is displaceable between a position where it covers the edge of the other medium and a position where it does not cover the edge of the other medium; The media processing device of claim 1 .

8. the end cover portion is displaceable by rotating between a position where it covers the end of the other medium and a position where it does not cover the end of the other medium; The media processing device of claim 7 .

9. the end cover portion is displaced up and down between a position where it covers the end of the other medium and a position where it does not cover the end of the other medium; The media processing device of claim 7 .

10. an image forming device for forming an image on the medium; a media processing device according to claim 1 , which binds a plurality of the media on which images have been formed by the image forming device; An image forming system comprising:

Images