Medium processing device and image forming system

Abstract

The purpose of the present invention is to provide a medium processing device and an image forming system capable of improving user convenience in attaching and detaching a liquid storage tank in a medium processing device that performs binding processing accompanying liquid application to a medium. The medium processing apparatus includes: a liquid applying unit that applies a liquid to a portion of at least one medium; a first liquid storage unit that stores a liquid to be applied by the liquid application unit; a liquid supply apparatus includes a first liquid storage unit that stores a liquid supplied to the first liquid storage unit, a second liquid storage unit that stores the liquid supplied to the first liquid storage unit, and a liquid supply unit that performs a liquid supply operation of supplying the liquid from the second liquid storage unit to the first liquid storage unit, and the second liquid storage unit includes: a liquid storage tray connected to the liquid supply unit; a liquid storage tank which stores the liquid and can be assembled and disassembled relative to the liquid storage tray; and a lock mechanism that restricts the position of the reservoir tank attached to the reservoir tray.

Description

Technical Field

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

[0002] A media processing device is known for binding a sheet bundle formed by overlapping sheet-like media. Binding methods applicable to this media processing device include "needle binding," which uses a needle-like member (binding member) that penetrates the sheet bundle for binding, and "press binding," which binds the sheet bundle by locally applying pressure and deforming it. Furthermore, a water-pressing binding method is also known for applying liquid to paper sheets, which are sheet-like media, and a water-pressing binding device capable of performing this method is also known.

[0003] A known water-addition compression binding apparatus includes a detachable water supply tank for replenishing liquid to a water storage tank having a liquid supply mechanism when the remaining liquid level in the water storage tank decreases.

[0004] As a prior art, for the purpose of providing a small humidifier that can easily carry out loading and unloading operations of a water supply tank for replenishing water even in a narrow place, a method is disclosed in which a flat surface portion of a water supply container is docked with a flat surface portion of a main body shell side, and the device is freely held on the side of the main body shell by first and second locking portions for loading and unloading (see patent document 1).

[0005] To refill the water supply tank of a water-adding compression binding device, the water supply tank must be removed. However, the prior art disclosed in Patent Document 1 does not explicitly describe a mechanism for facilitating the installation and removal of the water supply tank of a media processing device. This means that improving user convenience is a challenge in the installation and removal mechanism of the water supply tank of a media processing device.

[0006] An object of the present invention is to provide a media processing apparatus that performs a binding process on media accompanied by application of liquid, and that can improve user convenience in attaching and detaching a liquid tank.

[0007] [Patent Document 1] (Japanese) Patent Publication No. 2012-026605 Summary of the Invention

[0008] In order to solve the above-mentioned problems, one embodiment of the present invention relates to a medium processing device, characterized in that it includes: a liquid applying part, which applies liquid to a part of at least one medium; a first liquid storage part, which stores liquid for liquid applying by the liquid applying part; a second liquid storage part, which stores the liquid supplied to the first liquid storage part, and a liquid supply unit, which performs a liquid supply action of supplying the liquid from the second liquid storage part to the first liquid storage part, and the second liquid storage part has: a liquid storage tray, which is connected to the liquid supply unit; a liquid storage tank, which stores the liquid and can be loaded and unloaded relative to the liquid storage tray; a locking mechanism, which limits the position of the liquid storage tank installed on the liquid storage tray.

[0009] According to the present invention, in a media processing apparatus that performs a binding process involving application of liquid to media, user convenience in attaching and detaching a liquid tank can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The figure shows the overall structure of the image forming system.

[0011] Figure 2 FIG. 1 is a diagram showing the internal structure of the post-processing device according to the first embodiment.

[0012] Figure 3 FIG. 1 is a schematic diagram of the end stapling processing section as viewed from the upstream side in the conveying direction.

[0013] Figure 4 FIG. 1 is a schematic diagram of the end stapling processing section as viewed from the liquid applying section side in the main scanning direction.

[0014] Figure 5 (A) and (B) are schematic diagrams showing the structure of the crimping portion of the end binding processing portion.

[0015] Figure 6 FIG. 2 is a diagram showing a modified example of the end binding processing unit.

[0016] Figure 7 (A) to (C) are diagrams showing a liquid applying and pressing portion according to a modified example of the end binding processing portion.

[0017] Figure 8 (A)-(C) show Figure 7 A diagram showing the liquid applying action to the crimping portion and the crimping binding action.

[0018] Figure 9 FIG. 1 is a schematic diagram of the stapling processing section as viewed from the upstream side in the conveying direction.

[0019] Figure 10FIG. 1 is a schematic diagram of a modified example of the stapling processing section as viewed from the upstream side in the conveyance direction.

[0020] Figure 11 FIG. 1 is a diagram showing the hardware configuration of a control module for controlling the post-processing device according to the first embodiment.

[0021] Figure 12 FIG. 1 is a flowchart of the binding process of the end binding processing section.

[0022] Figure 13 (A) to (C) of FIG. 1 are diagrams showing the positions of the liquid applying section and the pressure-bonding section during the binding process of the end binding processing section.

[0023] Figure 14 (A) and (B) show the configuration and structure of the second liquid storage tank in the post-processing device.

[0024] Figure 15 (A)-(C) show the assembly and disassembly structure diagram of the second liquid storage tank in the post-processing device.

[0025] Figure 16 1 is a flowchart of the liquid supply determination process according to this embodiment.

[0026] Figure 17 1 is an explanatory diagram of the liquid supply and discharge mode according to the present embodiment.

[0027] Figure 18 (A) to (D) are diagrams illustrating examples of liquid replenishment in the first liquid tank according to this embodiment.

[0028] Figure 19 1 is a flowchart of the liquid supply determination process according to this embodiment.

[0029] Figure 20 (A) and (B) are diagrams illustrating examples of liquid replenishment in the first liquid tank according to the present embodiment.

[0030] Figure 21 1 is a flowchart of the liquid supply determination process according to this embodiment.

[0031] Figure 22 1 is a flowchart of the liquid supply determination process according to this embodiment.

[0032] Figure 23 (A) and (B) are schematic explanatory diagrams of the liquid discharge operation in one of the liquid discharge modes.

[0033] Figure 24 1 is a flowchart of the liquid supply determination process according to this embodiment.

[0034] Figure 25 FIG. 1 is a diagram showing an example of a selection input screen for a liquid supply and discharge mode according to the present embodiment.

[0035] Figure 26 (A) and (B) are diagrams showing another example of the attachment and detachment structure of the second tank in the post-processing device.

[0036] Figure 27 (A) and (B) show the detailed structure of the second liquid storage tank.

[0037] Figure 28 (A)-(D) show detailed structural examples of the locking mechanism of the second liquid storage tank.

[0038] Figure 29 (A) to (C) show exemplary views of the locking claws that constitute the locking mechanism.

[0039] Figure 30 (A) to (C) show exemplary diagrams of the relationship between the components constituting the locking mechanism.

[0040] Figure 31 (A) to (D) are exemplary diagrams showing modified examples of the detailed configuration of the locking mechanism provided in the second reservoir tank.

[0041] Figure 32 FIG. 1 is a diagram showing a modified example of the detailed configuration of the locking mechanism provided in the second reservoir tank.

[0042] Figure 33 (A) and (B) are exemplary diagrams showing modified examples of the detailed configuration of the locking mechanism provided in the second reservoir tank.

[0043] Figure 34 Shown is an exemplary diagram of a liquid supply unit connected to a second liquid tank.

[0044] Figure 35 The figure shows an example of the arrangement of the liquid level detection sensor provided in the second liquid storage tank.

[0045] Figure 36 (A) to (E) are diagrams illustrating the operation of parallel binding performed by the crimping section and the liquid applying section.

[0046] Figure 37 FIG. 1 is a diagram showing the internal structure of a post-processing device according to a second embodiment.

[0047] Figure 38 (A) to (C) are views showing the inner tray according to the second embodiment as viewed from the thickness direction of paper.

[0048] Figure 39FIG. 1 is a schematic diagram of the pressure-bonding portion according to the second embodiment as viewed from the downstream side in the conveying direction.

[0049] Figure 40 (A) and (B) are views showing the liquid applying portion according to the second embodiment as viewed from the thickness direction of paper.

[0050] Figure 41 (A)-(C) shows Figure 40 XXV-XXV cross-sectional view.

[0051] Figure 42 (A)-(C) shows Figure 40 Cross-sectional view of XXVI-XXVI.

[0052] Figure 43 FIG. 1 is a diagram showing the hardware configuration of a control module of a post-processing device according to a second embodiment.

[0053] Figure 44 FIG. 1 is a post-processing flowchart of the post-processing device according to the second embodiment.

[0054] Figure 45 FIG. 1 is a diagram showing the overall configuration of a modified example of the image forming system.

[0055] Figure 46 (A) and (B) show a first modification of the control unit of the post-processing device.

[0056] Figure 47 (A) and (B) show a second modification example of the control unit of the post-processing device. DETAILED DESCRIPTION

[0057] [Embodiment of Image Forming System 1]

[0058] Hereinafter, an image forming system 1 according to the present invention will be described with reference to the drawings. Figure 1 FIG. 1 is a diagram showing the overall structure of the image forming system 1. The image forming system 1 has an image forming function for forming an image on a sheet of paper P, which is a type of sheet-like medium, and a post-processing function for performing a predetermined post-processing on the paper P on which the image is formed. Figure 1 As shown, the image forming system 1 is configured such that an image forming apparatus 2 having an image forming function and a post-processing apparatus 3 as a medium processing apparatus having a post-processing function according to the present invention operate in cooperation.

[0059] In this embodiment, the description assumes that "paper" is the sheet-like medium processed in the image forming system 1. However, the objects processed according to this embodiment are not limited to paper. For example, as long as the medium can be imaged using conventional image forming processes, its type is not limited. Furthermore, media that can be folded or bound is also included, and there are no restrictions on material or specifications.

[0060] The image forming apparatus 2 forms an image on paper P and discharges the image-formed paper P to the post-processing apparatus 3. The image forming apparatus 2 includes a storage tray 211 for storing paper P, a conveying unit 212 for conveying the paper P stored in the storage tray 211, and an image forming unit 213 for forming an image on the paper P conveyed by the conveying unit 212. The image forming unit 213 may employ an inkjet method that uses ink to form an image, or an electrophotographic method that uses toner to form an image. The image forming unit 213 also includes a control unit 100a that controls the various operations of the conveying unit 212 and the image forming unit 213. The configuration of the image forming apparatus 2 is well known, and therefore a detailed description thereof will be omitted.

[0061] Paper is a well-known example of sheet-like media. Therefore, in this specification, "paper P" is used to describe the sheet-like media to be processed. Furthermore, when describing a sheet bundle, a "paper bundle Pb," which is a bundle of multiple sheets of paper, is used as an example.

[0062] [First embodiment of post-processing device 3]

[0063] Figure 2 FIG2 shows the internal structure of the post-processing device 3 according to the first embodiment. The post-processing device 3 has the function of performing predetermined post-processing on the paper P on which an image has been formed by the image forming device 2. One of the post-processing methods according to this embodiment is a "press-bonding process" for binding a bundle of multiple paper P (sheet bundles) with images formed thereon without using binding needles. Another post-processing method according to this embodiment is a "needle binding process" for binding a bundle of multiple paper P (sheet bundles) with images formed thereon using binding needles. Hereinafter, the bundle of paper P will be referred to as a "paper bundle Pb" as a medium bundle.

[0064] In this embodiment, the liquid application process during the pressure-bonding process is mainly described. However, the liquid application process performed in conjunction with the needle binding process is also similar. In the following description, the term "binding process" includes both the "pressure-bonding process" and the "needle binding process" described above, and is not limited to the binding method (using a binding needle or pressure deformation).

[0065] More specifically, the "press-stitch binding process" of this embodiment is a process that applies pressure to a binding position corresponding to a portion of the paper bundle Pb, deforming the binding position (pressurized deformation) to perform binding. This process is called "press-stitch binding." Furthermore, the binding processes executable by the post-processing device 3 include end-stitching for binding the ends of the paper bundle Pb and saddle-stitching for binding the center of the paper bundle Pb.

[0066] The post-processing device 3 includes conveying roller pairs 10 to 19 (conveyance units), a switching component 20, and a control unit 100 b (control unit). The control unit 100 b controls the operation of the conveying roller pairs 10 to 19 (conveyance units), the switching component 20, and the like. Details of the control unit 100 b will be described later. The conveying roller pairs 10 to 19 convey the paper P supplied from the image forming device 2 within the post-processing device 3. More specifically, the conveying roller pairs 10 to 13 convey the paper P along the first conveying path Ph1. Furthermore, the conveying roller pairs 14 to 15 convey the paper P along the second conveying path Ph2. Furthermore, the conveying roller pairs 16 to 19 convey the paper P along the third conveying path Ph3. Furthermore, a punching unit 132 for punching the paper P conveyed by the conveying roller pairs 10 and 11 is arranged between the conveying roller pairs 10 and 11.

[0067] The first conveyance path Ph1 is a path from the paper P supply port of the image forming apparatus 2 to the first discharge tray 21. The second conveyance path Ph2 branches off from the first conveyance path Ph1 between the conveyance roller pairs 11 and 14 in the conveyance direction and reaches the second discharge tray 26 via the inner tray 22. The third conveyance path Ph3 branches off from the second conveyance path Ph2 between the conveyance roller pairs 11 and 14 in the conveyance direction and reaches the third discharge tray 30.

[0068] The switching component 20 is arranged at the branch position of the first conveying path Ph1 and the second conveying path Ph2. The switching component 20 is configured to be able to switch between a first position for discharging the paper P to the first discharge tray 21 through the first conveying path Ph1 and a second position for guiding the paper conveyed on the first conveying path Ph1 to the second conveying path Ph2. In addition, when the rear end of the paper P entering the second conveying path Ph2 passes through the branch position of the second conveying path Ph2 and the third conveying path Ph3, the paper is guided to the third conveying path Ph3 by rotating the conveying roller pair 14 in the opposite direction. In addition, the post-processing device 3 is provided with a plurality of sensors for detecting the position of the paper P on each of the conveying paths Ph1, Ph2, and Ph3. In addition, the plurality of sensors are Figure 2 Indicated by a black triangle (▲).

[0069] The post-processing device 3 includes a first discharge tray 21 . Paper P discharged through the first transport path Ph1 is placed on the first discharge tray 21 . Paper P supplied from the image forming device 2 that has not been stapled is discharged to the first discharge tray 21 .

[0070] The post-processing device 3 also includes an internal tray 22 serving as a loading tray, a bottom fence 23, side fences 24L and 24R, an end stapling unit 25, a needle stapling unit 155, and a second discharge tray 26. The internal tray 22, the bottom fence 23, the side fences 24L and 24R, the end stapling unit 25, and the needle stapling unit 155 perform end stapling on a paper bundle Pb consisting of a plurality of paper sheets P conveyed from the second conveyance path Ph2 to the internal tray 22. The end-stapling-treated paper bundle Pb of the paper sheets P supplied from the image forming apparatus 2 is discharged onto the second discharge tray 26.

[0071] The "end binding processing" mentioned here includes "parallel binding processing" which performs binding processing along the side of the paper bundle Pb parallel to the main scanning direction, "oblique binding processing" which performs binding processing on the corners of the paper bundle Pb, and "vertical binding processing" which performs binding processing along the side of the paper bundle Pb parallel to the conveying direction.

[0072] Hereinafter, the direction in which the paper P is conveyed from the conveyor roller pair 15 toward the end fence 23 is defined as the "conveying direction." Specifically, the "conveying direction" in this specification refers to the direction in which the paper P, after being transported toward the second discharge tray 26 by the conveyor roller pair 10 and the like, is redirected by the conveyor roller pair 15 toward the end fence 23, a direction different from the previous direction. Furthermore, the direction perpendicular to the thickness direction of the paper P and the conveying direction is defined as the "main scanning direction (the width direction of the paper P)."

[0073] The multiple sheets of paper P sequentially conveyed through the second conveyance path Ph2 are temporarily placed on the inner tray 22, serving as a loading tray. The bottom fence 23 aligns the paper sheets P or paper bundle Pb placed on the inner tray 22 in the conveyance direction. The side fences 24L and 24R align the paper sheets P or paper bundle Pb placed on the inner tray 22 in the main scanning direction. The end stapling unit 25 and the needle stapling unit 155 perform end stapling on the paper bundle Pb aligned by the bottom fence 23 and the side fences 24L and 24R. The conveying roller pair 15 then discharges the end-stapled paper bundle Pb onto the second discharge tray 26.

[0074] The post-processing device 3 further includes a bottom fence 27, a saddle stitching unit 28, a folding plate 29, and a third discharge tray 30. The bottom fence 27, the saddle stitching unit 28, and the folding plate 29 perform saddle stitching on a paper bundle Pb consisting of a plurality of paper sheets P conveyed via the third conveyance path Ph3. The saddle stitched paper bundle Pb of the paper sheets P supplied from the image forming device 2 is discharged onto the third discharge tray 30.

[0075] The bottom fence 27 aligns the positions of the multiple sheets of paper P sequentially conveyed along the third conveyance path Ph3 in the conveying direction. Furthermore, the bottom fence 27 is configured to be movable in the direction in which the sheets of paper P are conveyed (up and down in the figure) toward and away from the bottom fence 27, so that the center of the sheet bundle Pb is positioned opposite the saddle stitching unit 28 at the binding position and opposite the folding plate 29 at the bending position. The saddle stitching unit 28 staples the center of the sheet bundle Pb aligned by the bottom fence 27 at the binding position. The folding plate 29 folds the sheet bundle Pb placed on the bottom fence 27 at the bending position in half and clamps it between the conveyance roller pair 18. The conveyance roller pairs 18 and 19 discharge the saddle-stitched sheet bundle Pb onto the third discharge tray 30.

[0076] In addition, as described later Figure 3 and Figure 4 As shown, the post-processing device 3 includes a liquid applying unit 501 (part of the liquid applying unit), a liquid supply unit 50 (part of the liquid applying unit), and a first liquid tank 44 (first liquid reservoir) in the end stapling processing unit 25. Furthermore, the post-processing device 3 includes a liquid supply path 45 (part of the liquid supply unit), a liquid supply pump 46 (part of the liquid supply unit), a second liquid tank 47 (part of the second liquid reservoir), and a second tank fixing unit 61 (part of the second liquid reservoir) as components for replenishing liquid in the first liquid tank 44. The liquid stored in the second liquid tank 47 is supplied to the first liquid tank 44 via the second tank fixing unit 61, the liquid supply pump 46, and the liquid supply path 45.

[0077] [Detailed Description of the End Binding Processing Unit 25]

[0078] Figure 3 The figure is viewed from the upstream side in the conveying direction. Figure 2 FIG. 2 is a schematic diagram of the end binding processing section 25 that performs liquid application processing and pressure binding processing. Figure 4 FIG. 2 is a schematic diagram of the end binding processing unit 25 as viewed from the liquid applying unit 31 side in the main scanning direction. Figure 3 As shown, the end stapling processing unit 25 includes a liquid applying unit 31 for applying liquid to the paper P, and a pressure bonding unit 32, as an example of a post-processing unit, for performing pressure bonding on the paper bundle Pb. The liquid applying unit 31 and the pressure bonding unit 32 are arranged adjacent to each other in the main scanning direction on the downstream side of the inner tray 22 in the conveyance direction.

[0079] like Figure 4 As shown, the liquid applying unit 31 applies liquid stored in the first liquid tank 44 to the paper P or paper bundle Pb placed on the inner tray 22. Hereinafter, the application of liquid by the liquid applying unit 31 to the paper P or paper bundle Pb and the operation of the liquid applying unit 31 during this application will be referred to as "liquid application." Furthermore, the liquid application operation of the liquid applying unit 31 accompanied by control processing will be referred to as "liquid application processing."

[0080] Here, the liquid stored in the first liquid storage tank 44 for "liquid delivery" is, more specifically, a liquid primarily composed of a liquid compound of hydrogen and oxygen represented by the chemical formula "H2O." As long as it is in liquid form, its temperature can be either warm or hot water. Furthermore, it is not limited to pure water; it can, of course, contain ionized salts. The metal ion content can range from so-called soft water to super-hard water, regardless of hardness.

[0081] In addition to the main ingredients, additives may be added. Residual chlorine, such as in tap water, may also be present. Colorants, penetrants, pH adjusters, preservatives such as phenoxyethanol, and anti-drying agents such as glycerin are also preferably added. Furthermore, ink used in inkjet printers and ink used in water-based pens also use water as an ingredient, so these can also be used as "liquid application."

[0082] The present invention is not limited to the specific examples listed here. Even "water" in a broad sense, such as hypochlorous acid water or diluted ethanol aqueous solution used for disinfection, is also effective. As long as the purpose is to improve the binding strength after the binding process, tap water, which is easily available and manageable, can be used. In addition, as for the liquid, using the above examples, a liquid mainly composed of water can improve the binding strength of the paper bundle Pb compared to a liquid not mainly composed of water.

[0083] like Figure 3 and Figure 4 As shown, the liquid applying unit 31 is configured to be movable in the main scanning direction along with the crimping unit 32 by the driving force transmitted from the end stapling unit moving motor 55. The liquid applying unit 31 includes a lower pressing plate 33, an upper pressing plate 34, and a liquid applying unit moving mechanism 35, which serves as a placement platform for the paper P or paper bundle Pb. The components of the liquid applying unit 31 (the lower pressing plate 33, the upper pressing plate 34, the liquid applying unit moving mechanism 35, and the liquid applying unit moving motor 42) are held by at least one of the liquid applying frame 31a and the base member 48.

[0084] In addition, the liquid imparting portion 31 is fixed with a liquid imparting portion rotating shaft 562 having a drive transmission gear 562a on its bottom surface by the liquid imparting portion frame 31a that is a component of the liquid imparting portion 31. The liquid imparting portion rotating shaft 562 and the drive transmission gear 562a are maintained to be rotatable in the forward and reverse directions on the base component 48 that is provided with the liquid imparting portion frame 31a. In addition, the drive transmission gear 562a is engaged with the output gear 563a of the liquid imparting portion rotating motor 563. Then, the liquid imparting portion 31 is configured so that the driving force of the liquid imparting portion rotating motor 563 is transmitted to the liquid imparting portion rotating shaft 562 via the output gear 563a and the drive transmission gear 562a, so that the liquid imparting portion rotating shaft 562 can be rotated in the forward and reverse directions on the base component 48.

[0085] The lower push plate 33 and the upper push plate 34 are arranged on the downstream side of the inner tray 22 in the conveying direction. The paper P or paper bundle Pb placed on the inner tray 22 is also placed on the lower push plate 33. The lower push plate 33 is mounted on a lower push plate holder 331. The upper push plate 34 is configured to move in the thickness direction of the paper P or paper bundle Pb placed on the inner tray 22 while facing the paper P or paper bundle Pb.

[0086] Specifically, the lower push plate 33 and the upper push plate 34 are arranged to face each other in the thickness direction of the paper P or paper bundle Pb (hereinafter referred to as the "thickness direction"), sandwiching the paper P or paper bundle Pb placed on the inner tray 22. Furthermore, a through-hole 34a is formed in the upper push plate 34, extending through the paper P or paper bundle Pb in the thickness direction, at a position facing the liquid applying member 501 held by the holding portion 37 attached to the bottom plate 40. The liquid applying member 501 is one end portion of the liquid supply member 50 (liquid aspirator), described later, and corresponds to the leading end portion.

[0087] The liquid applying unit moving mechanism 35 moves the upper pressing plate 34, the bottom plate 40, the holding portion 37, the liquid applying member 501, the liquid supply member 50, and the first liquid tank 44 in the thickness direction of the paper P or the paper bundle Pb. The liquid applying unit moving mechanism 35 according to this embodiment uses a single liquid applying unit moving motor 47 to integrally move the upper pressing plate 34, the bottom plate 40, the holding portion 37, the liquid applying member 501, the first liquid supply member 50, and the first liquid tank 44. The liquid applying unit moving unit 35 includes, for example, a liquid applying unit moving motor 42, a trapezoidal screw 38, a nut 39, the bottom plate 40, columnar members 41a and 41b, and coil springs 42a and 42b.

[0088] The liquid application unit movement motor 42 generates a driving force to move the upper push plate 34, base plate 40, retaining portion 37, liquid application member 501, liquid supply member 50, and first liquid tank 44. A trapezoidal screw 38 extends in the thickness direction of the paper P or paper bundle Pb and is arranged on the liquid application frame 31a so that it can rotate in both forward and reverse directions. Furthermore, the trapezoidal screw 38 is connected to the output shaft of the liquid application unit movement motor 42 via a pulley or belt. A nut 39 is threadedly engaged with the trapezoidal screw 38. Then, when the driving force from the liquid application unit movement motor 42 is transmitted, the nut 39 moves back and forth on the trapezoidal screw 38 as the trapezoidal screw 38 rotates in both forward and reverse directions.

[0089] The bottom plate 40 is arranged at a position away from the upper push plate 34. In addition, the bottom plate 40 holds the liquid applying member 501 in a state where the front end portion of the liquid applying member 501 protrudes from the bottom plate 40 toward the upper push plate 34. Furthermore, the bottom plate 40 is connected to the trapezoidal screw 38 via a nut 39, and is configured to be able to move back and forth along the trapezoidal screw 38 by rotating the trapezoidal screw 38 in the forward and reverse directions. Then, the vertical position of the bottom plate 40 is detected by the movement sensor 40a (refer to Figure 11 ) to detect.

[0090] The columnar members 41a and 41b protrude from the base plate 40 toward the upper push plate 34 around the front end of the liquid applying member 501. Furthermore, the columnar members 41a and 41b are configured to be movable relative to the base plate 40 in the thickness direction. Furthermore, the columnar members 41a and 41b retain the upper push plate 34 at their front ends on the side of the lower push plate 33. Furthermore, a fall-off prevention member is provided at the front ends of the columnar members 41a and 41b on the side opposite to the lower push plate 33 to prevent the columnar members 41a and 41b from falling off the base plate 40.

[0091] Coil springs 42a, 42b are externally inserted on columnar members 41a, 41b between bottom plate 40 and upper push plate 34. Coil springs 42a, 42b urge upper push plate 34 and columnar members 41a, 41b toward lower push plate 33 relative to bottom plate 40.

[0092] The liquid applying unit 31 applies liquid to the paper P or paper bundle Pb placed on the inner tray 22. More specifically, the liquid applying unit 31 applies liquid to at least one paper P constituting the paper bundle Pb by bringing the liquid applying member 501 into contact with the paper P or paper bundle Pb.

[0093] The liquid applying unit 31 includes a first liquid level sensor 43 (first liquid detection means), a first liquid tank 44, a liquid applying member 501, a liquid supply member 50, and a holding unit 37. The first liquid tank 44 stores liquid for applying liquid to the paper P or paper bundle Pb. The liquid level (liquid volume) of the liquid stored in the first liquid tank 44 is detected by the first liquid level sensor 43. Furthermore, the first liquid tank 44 is connected to the base plate 40 via the holding unit 37.

[0094] The liquid applying member 501, the liquid supply member 50 (which absorbs liquid) arranged in close contact with the liquid applying member 501, and the first liquid tank 44 are all held by the retaining portion 37. Furthermore, the retaining portion 37 is held on the base plate 40. One end of the liquid supply member 50 is in close contact with the liquid applying member 501, while the other end is immersed in the liquid stored in the first liquid tank 44. In other words, the other end of the liquid supply member 50 acts as the immersion portion 502 that absorbs liquid and supplies it to the liquid applying member 501. The liquid applying member 501 and the liquid supply member 50 are constructed from a material with a high liquid absorption rate (e.g., sponge or fiber), such as an elastic resin with interconnected cells. However, the liquid applying member 501 and / or the liquid supply member 50 can be made of any material capable of absorbing and retaining liquid, and can be deformed by applied pressure when in contact with the paper P. In other words, they can be made of any material capable of absorbing liquid through capillary action.

[0095] Therefore, when the other end (immersion portion 502) of the liquid supply member 50 is immersed in the liquid stored in the first liquid tank 44, the liquid supply member 50 draws up the liquid through capillary action. Specifically, the liquid stored in the first liquid tank 44 is drawn up from the immersion portion 502 of the liquid supply member 50 and supplied to the liquid application member 501 connected to the front end via the liquid supply member 50. As the liquid stored in the first liquid tank 44 is drawn up by the liquid application member 501, which is in close contact with one end of the liquid supply member 50, the liquid level (liquid storage amount) of the liquid stored in the first liquid tank 44, as detected by the first liquid level sensor 43, decreases. As a result, the liquid supply pump 46 supplies liquid from the second liquid tank 47 to the first liquid tank 44.

[0096] Furthermore, while the above description describes a case where the liquid supply member 50 and the liquid applying member 501 are separate components, the liquid supply member 50 and the liquid applying member 501 may be integrally formed from a material having the same properties (e.g., a material with a high liquid absorption rate). In other words, the liquid applying member 501 may be formed as part of the liquid supply member 50. In this case, liquid can be supplied more smoothly from the liquid supply member 50 to the liquid applying member 501 by utilizing capillary action, and costs can be reduced.

[0097] Then, liquid is drawn from the first liquid tank 44 by the liquid applying component 501, and the liquid level in the first liquid tank 44 temporarily drops below a reference level (described later). This triggers a series of liquid supply operations, transferring liquid from the second liquid tank 47 to the first liquid tank 44. This liquid supply operation is primarily performed upon startup of the post-processing device 3 and upon commencement of the binding process in the post-processing device 3, which involves liquid application. It serves as a liquid supply operation for enabling liquid application using the liquid applying component 501. This liquid supply operation will be referred to as a "filling and supplying operation" hereinafter. Details of the filling and supplying operation will be described later.

[0098] In addition, the post-processing device 3 is provided with a second tank 47. The second tank 47 is configured to be attachable to and detachable from the post-processing device 3 (see Figure 15 The second reservoir 47 is configured to be fixed (installed) in a predetermined posture on the second reservoir fixing portion 61 (a portion of the second reservoir portion) so as to be able to supply the stored liquid to the first reservoir 44 .

[0099] The operation of supplying liquid from the second liquid tank 47 to the first liquid tank 44 by the liquid supply pump 46 is primarily triggered by a decrease in the amount of liquid (liquid level) in the first liquid tank 44, a reference liquid level (described later). The amount of liquid (liquid level) in the first liquid tank 44 decreases as liquid is consumed by the liquid application unit 31. In other words, the operation of supplying liquid from the second liquid tank 47 to the first liquid tank 44 corresponds to the liquid supply operation required for the execution of a task involving the application of liquid by the liquid application unit 31.

[0100] This liquid supply operation corresponds to adding liquid to the first liquid tank 44 each time the liquid level (liquid level) in the first liquid tank 44 falls below a reference level (described later). This liquid supply operation is hereinafter referred to as the "addition supply operation." The details of the addition supply operation will be described later.

[0101] When the second tank 47 is set on the second tank fixing portion 61, a certain amount of liquid in the second tank 47 is filled into the second tank fixing portion 61. The second tank fixing portion 61 is provided with a detection sensor 51 (setting detection unit) (see Figure 15 The installation detection sensor 51 detects the installation state of the second tank 47 to the second tank fixing portion 61 (refer to Figure 15 When (C) is reached, a signal notifying this state is sent to the control unit 100b, which will be described later. Thus, the control unit 100b, which will be described later, is configured to detect whether the second tank 47 is installed on the second tank fixing portion 61. The configuration of the second tank 47 will be described in detail later.

[0102] The first liquid tank 44 and the second liquid tank 47 are connected via a liquid supply path 45. A liquid supply pump 46 is provided near the second liquid tank fixing portion 61. As the liquid supply pump 46 operates, the liquid stored in the second liquid tank 47 is supplied (replenished) from the second liquid tank 47 to the first liquid tank 44 via the liquid supply path 45. Therefore, the second liquid tank fixing portion 61 is a component of the liquid supply unit that performs the liquid supply operation of supplying liquid from the second liquid tank 47 to the first liquid tank 44. Furthermore, the liquid supply path 45 is formed of a flexible material. Thus, even if the first liquid tank 44 is moved by the liquid application unit moving mechanism 35, liquid can still be reliably supplied from the second liquid tank 47 to the first liquid tank 44.

[0103] The amount of liquid supplied from the second liquid tank 47 to the first liquid tank 44 can be controlled based on the detection result of the first liquid level sensor 43. Specifically, the control unit 100b, described later, determines the amount of liquid (liquid level) in the first liquid tank 44 based on the detection result of the first liquid level sensor 43. The control unit 100b, described later, then controls the operating speed or operating time of the liquid supply pump 46 based on the determined amount of liquid (liquid level) in the first liquid tank 44. This allows the amount of liquid replenished in the first liquid tank 44 to be adjusted, and control is performed to maintain the amount of liquid (liquid level) in the first liquid tank 44 at or above a predetermined level.

[0104] [Configuration of the Press-Contact Section 32]

[0105] The crimping portion 32, which serves as a post-processing unit, applies pressure to a portion of the paper bundle Pb by means of the concave-convex upper crimping teeth 32a and the lower crimping teeth 32b to deform the portion, and binds the paper bundle Pb by crimping the paper sheets P in the portion together. That is, the crimping portion 32 is capable of binding the paper bundle Pb without using a binding needle. The components of the crimping portion 32 (the upper crimping teeth 32a and the lower crimping teeth 32b) are provided on the crimping frame 32c. Hereinafter, the situation in which the paper bundle Pb is bound by applying pressure and deforming a predetermined position thereof by the crimping portion 32 will be simply referred to as "crimping binding." In addition, the crimping binding action of the crimping portion 32 accompanied by the control process will be referred to as "crimping binding processing."

[0106] Figure 5 Schematic diagram of the structure of the crimping portion 32 is shown. Figure 5 As shown, the crimping portion 32 includes an upper crimping tooth 32a and a lower crimping tooth 32b. The upper crimping tooth 32a and the lower crimping tooth 32b are arranged to face each other in the thickness direction of the paper bundle Pb so as to be able to clamp the paper bundle Pb placed on the inner tray 22. The mutually opposing surfaces of the upper crimping tooth 32a and the lower crimping tooth 32b are formed into a concave-convex shape in which recesses and protrusions are alternately formed. In addition, the upper crimping tooth 32a and the lower crimping tooth 32b are formed in a positional relationship in which recesses and protrusions are alternately staggered so that they mesh with each other. Then, the upper crimping tooth 32a and the lower crimping tooth 32b are moved by the contact / separation motor 32d (refer to Figure 11 ) driving force to abut and separate.

[0107] In the process of a plurality of sheets of paper P constituting the paper bundle Pb being fed to the inner tray 22, as shown in FIG. Figure 5 As shown in (A), the upper pressing teeth 32a and the lower pressing teeth 32b are separated from each other. Then, when all the paper sheets P constituting the paper bundle Pb are loaded by the inner tray 22, as shown in FIG. Figure 5As shown in FIG. 2B , the upper pressing teeth 32a and the lower pressing teeth 32b engage with each other through the driving force of the contact / separation motor 32d, applying pressure in the thickness direction and deforming the paper bundle Pb. This pressure-bonds the paper bundle Pb placed on the inner tray 22. The pressure-bonded paper bundle Pb is then discharged to the second discharge tray 26 by the conveyor roller pair 15.

[0108] In addition, as the structure of the crimping portion 32, as long as the upper crimping teeth 32a and the lower crimping teeth 32b that constitute the crimping mechanism are engaged, it is not limited to the structure of the action mechanism illustrated in this embodiment. For example, it can be a crimping mechanism of a connecting rod mechanism type that uses a drive source and a connecting rod mechanism that only rotates forward or reverse to perform the crimping and separation actions of the upper crimping teeth 32a and the lower crimping teeth 32b (for example, the crimping mechanism disclosed in Japanese Patent No. 6057167). In addition, it can be a crimping mechanism of a direct-acting type that converts the rotational motion of the drive source in the forward and reverse directions into a threaded mechanism that moves back and forth to linearly perform the crimping and separation actions of the upper crimping teeth 32a and the lower crimping teeth 32b.

[0109] In addition, if Figure 3 As shown, the end binding processing unit 25 includes an end binding processing unit moving mechanism 57. The end binding processing unit moving mechanism 57 moves the end binding processing unit 25 (i.e., the liquid applying unit 31 and the pressure contact unit 32) in the main scanning direction along the end portion of the paper P placed on the inner tray 22 on the downstream side of the conveying direction. The end binding processing unit moving mechanism 57 includes, for example, a base member 48, a guide shaft 49, an end binding processing unit moving motor 55, a driving force transmission mechanism 551 for transmitting the driving force of the end binding processing unit moving motor 55 to the base member 48, and a standby position sensor 540 (see FIG. 4 ). Figure 11 ).

[0110] The liquid applying portion 31 and the pressure contact portion 32 are mounted on the base member 48 in a state adjacent to each other in the main scanning direction. Figure 4 As shown, the guide shaft 49 is held by a plurality of guide shaft brackets 49a arranged in the main scanning direction on the upstream side of the binding mechanism base 116 in the conveying direction. Figure 3 As shown, the guide shaft 49 is extended along the main scanning direction on the binding mechanism base 116. In addition, the guide rail 115 is provided on the downstream side of the binding mechanism base 116 in the conveying direction in the entire main scanning direction. Figure 4 As shown, the guide rail 115 includes an engaged portion 115a that engages with the engaging portion 48a of the base member 48 in the main scanning direction. That is, the base member 48 is held on the binding mechanism base 116 by the guide shaft 49 and the guide rail 115 so as to be movable in the main scanning direction.

[0111] The end stapling unit moving motor 55 generates a driving force for moving the end stapling unit 25. The driving force transmission mechanism 551 transmits the driving force of the end stapling unit moving motor 55 to the base member 48 via pulleys 551a and 551b, a timing belt 551c, and a fastening portion 48b that fastens the base member 48 to the timing belt 551c. As a result, the liquid applying unit 31 and the crimping unit 32, which are integrated by the base member 48, move in the main scanning direction along the guide shaft 49.

[0112] The end binding processing unit moving motor 55 involved in this embodiment is, for example, a servo motor, which can stop the end binding processing unit 25 at the target position (the first binding position B1 or the second binding position B2 described later) even if the servo motor does not return the end binding processing unit 25 to the origin position (for example, the standby position HP described later) during each movement.

[0113] In addition, the post-processing device 3 has a function of acknowledging that the end stapling processing section 25 reaches the standby position HP (see Figure 13 (A)) for detecting the standby position sensor 540 (for example, a light-shielding optical sensor, see Figure 11 ) and the encoder sensor 541 mounted on the output shaft of the end binding processing unit moving motor 55 (see Figure 11 Then, the control unit 10, which will be described later, detects that the end stapling processing unit 25 has reached the standby position HP based on the detection result of the standby position sensor 540. In addition, the control unit 10, which will be described later, counts the pulse signals output from the encoder sensor 541 to grasp the current position of the end stapling processing unit 25 that has moved from the standby position HP.

[0114] However, the specific method of stopping the end stapling unit 25 at the target position without returning to the standby position HP is not limited to the above example. As another example, the post-processing device 3 may include a sensor for detecting that the end stapling unit 25 has reached a predetermined target position.

[0115] In addition, if Figure 3 As shown in FIG. 3 , the crimping frame 32c that holds the component of the crimping portion 32 is fixed to a crimping portion rotating shaft 54 ​​having a drive transmission gear 54a on its bottom surface. The crimping portion rotating shaft 54 ​​and the drive transmission gear 54a are maintained to be rotatable in both positive and negative directions on a base component 48 that is provided with the crimping frame 32c. In addition, the drive transmission gear 54a is engaged with the output gear 56a of the crimping portion rotating motor 56. Then, the crimping portion 32 is constructed so that it can rotate in both positive and negative directions on the base component 48 around the crimping portion rotating shaft 54 ​​by transmitting the driving force of the crimping portion rotating motor 56 to the crimping portion rotating shaft 54 ​​via the output gear 56a and the drive transmission gear 54a.

[0116] The end stapling processing unit 25 is described as having the pressure-bonding unit 32 and the liquid supply unit 31 integrally formed and moving along the guide shaft 49. However, the present invention is not limited thereto. For example, the pressure-bonding unit 32 and the liquid application unit 31 may be independently movable.

[0117] [Modification of the End Binding Processing Unit 25]

[0118] Next, refer to Figures 6 to 8 Next, a modified example of the end stapling unit 25 included in the post-processing device 3 is described. This unit differs from the end stapling unit 25 of the first embodiment in that the liquid applying unit 31 and the crimping unit 32 are integrally formed. Components common to the end stapling unit 25 already described are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

[0119] Figure 6 Schematic diagram of the end stapling processing section 25 ′ as viewed from the upstream side in the conveying direction. Figure 7 FIG. 1(A) is a perspective view of the liquid applying crimping portion 310 . Figure 7 (B) shows Figure 7 (A) is a cross-sectional view taken along the AA arrow direction. Figure 7 (C) is shown from the side of the lower pressing tooth 32b Figure 7 (A) is a top view of the upper crimping teeth 32a. Figure 8 (A) to (C) are schematic diagrams showing the liquid applying operation and the pressure-bonding operation of the liquid applying and pressure-bonding section 310 as viewed from the downstream side in the conveying direction.

[0120] like Figure 6 As shown, the end stapling unit 25' includes a liquid applying and pressing unit 310 that integrates the liquid applying unit 31 and the pressing unit 32 (post-processing unit) of the end stapling unit 25 according to the first embodiment. The liquid applying and pressing unit 310 is arranged downstream of the inner tray 22 in the conveying direction.

[0121] The liquid applying and pressing section 310 applies liquid LQ stored in the first liquid tank 44 to the paper P or paper bundle Pb placed on the inner tray 22. The liquid applying and pressing section 310 is configured to move in the main scanning direction by transmitting the driving force of the end stapling unit moving motor 55 to the base member 48 via a driving force transmission mechanism 551. The liquid applying and pressing section 310 includes an upper pressing plate 34, upper pressing teeth 32a, lower pressing teeth 32b, a liquid applying and pressing section moving mechanism 350, and a liquid supply mechanism 360. The components of the liquid applying and pressing section 310 are held by at least one of the liquid applying frame 31a and the base member 48.

[0122] In addition, the liquid imparting crimping portion rotating shaft 561′ having a drive transmission gear 561a′ is fixed to the bottom surface of the liquid imparting frame 31a. The liquid imparting crimping portion rotating shaft 561′ and the drive transmission gear 561a′ are maintained on the base component 48 provided with the liquid imparting frame 31a so as to be rotatable in the forward and reverse directions. In addition, the drive transmission gear 561a′ is engaged with the output gear 56a′ of the liquid imparting crimping portion rotating motor 56′. Then, the liquid imparting crimping portion 310 is configured so as to be able to rotate in the forward and reverse directions on the base component 48 around the liquid imparting crimping portion rotating shaft 561′ as the center by transmitting the driving force of the liquid imparting crimping portion rotating motor 56′ to the liquid imparting crimping portion rotating shaft 561′ via the output gear 56a′ and the drive transmission gear 561a′.

[0123] The liquid application crimping unit moving mechanism 350 uses an electric cylinder 370 to move the upper pressing plate 34, the bottom plate 40, and the upper crimping teeth 32a in a coordinated manner in the thickness direction of the paper P or paper bundle Pb. The bottom plate 40 holds the upper crimping tooth holding member 32a1 and the upper crimping teeth 32a via a holding portion 46a. Furthermore, the bottom plate 40 movably holds the upper pressing plate 34 via columnar members 41a and 41b. The bottom plate 40 is attached to the front end of the push rod 371 of the electric cylinder 370 via a connecting member 401.

[0124] The columnar members 41a and 41b hold the upper push plate 34 at their lower ends. Coil springs 42a and 42b are externally inserted between the base plate 40 and the upper push plate 34. The coil springs 42a and 42b bias the upper push plate 34 and the columnar members 41a and 41b away from the base plate 40.

[0125] The liquid supply mechanism 360 includes a first liquid tank 44, a liquid supply pump 431, and a liquid supply component 45'. The liquid supply pump 431 supplies the liquid LQ to the liquid storage portion 320 provided in the upper crimping tooth holding component 32a1 through the liquid supply component 45'. Figure 7 The bottom end of the liquid supply component 45' is connected to the liquid supply pump 431, and the front end is connected to the liquid storage part 320. It is composed of a long and stretchable component.

[0126] like Figure 7 As shown in (B), the upper pressing teeth 32a are integrally provided in the upper pressing teeth holding member 32a1. Then, the upper pressing teeth holding member 32a1 includes a liquid accumulation portion 320 and a liquid supply path 321 for supplying the liquid LQ accumulated in the liquid accumulation portion 320 to the upper pressing teeth 32a. Figure 7As shown in (C), the surface of the upper pressing teeth 32a is subjected to a hydrophilic treatment so that the liquid LQ supplied from the liquid supply path 321 is evenly distributed over the surface of the upper pressing teeth 32a. On the other hand, the portion of the upper pressing teeth retaining member 32a1 other than the upper pressing teeth 32a is subjected to a hydrophobic treatment so that the liquid LQ is effectively distributed over the surface of the upper pressing teeth 32a.

[0127] like Figure 6 As shown, the lower crimping teeth 32 b are integrally provided on a lower crimping teeth holding member 32 b 1 which is a part of the liquid applying frame 31 a , and are mounted on the base member 48 via the lower crimping teeth holding member 32 b 1 .

[0128] Next, use Figure 8 The liquid applying and pressing binding operations of the liquid applying and pressing binding units 310 are described. Figure 8 As shown in (A), the upper pressing teeth 32a and the lower pressing teeth 32b are separated. Then, when the paper P is loaded on the inner tray 22, the electric cylinder 370 is contracted to move the upper pressing teeth 32a and the upper push plate 34 toward the paper P. In this way, as shown in FIG. Figure 8 As shown in (B), the upper pressing plate 34 initially contacts the paper P, and then the upper pressing teeth 32a contact the paper P through the through-holes 34a of the upper pressing plate 34. At this time, since the liquid LQ is spread over the surface of the upper pressing teeth 32a, the contact of the upper pressing teeth 32a with the paper P causes the liquid to be applied to the liquid application position of the paper P. Then, when the liquid application to the liquid application position is completed, the electric cylinder 370 is extended to separate the upper pressing teeth 32a and the upper pressing plate 34 from the paper P. The contact and separation action (liquid application action) of the upper pressing teeth 32a and the upper pressing plate 34 on the paper P described above is repeatedly performed on the paper P constituting the paper bundle Pb.

[0129] Then, after the paper bundle Pb consisting of a predetermined number of paper sheets P is placed on the inner tray 22, the electric cylinder 370 is further retracted to move the upper pressing teeth 32a through the liquid application position toward the lower pressing teeth 32b. Figure 8 As shown in (C), when the paper bundle Pb is clamped between the upper crimping teeth 32a and the lower crimping teeth 32b, the upper crimping teeth 32a further move toward the lower crimping teeth 32b, and the upper crimping teeth 32a and the lower crimping teeth 32b press the paper bundle Pb to deform it, thereby crimping and binding the paper bundle Pb (crimping and binding action).

[0130] [Description of Stitch Binding Processing Unit 155]

[0131] Next, the needle binding processing unit 155 having the function of executing the needle binding process will be described in detail. Figure 9The figure shows a schematic diagram of the needle stapling unit 155 as viewed from the upstream side in the conveyance direction. The needle stapling unit 155 includes a needle stapling mechanism 62 that uses staples to bind the paper bundle Pb. The needle stapling unit 62 is located downstream of the inner tray 22 in the conveyance direction, spaced apart from the end stapling unit 25 in the main scanning direction.

[0132] The stitching unit 62 as a post-processing device has a structure for performing a so-called "stitching process" for binding the paper bundle Pb using a binding needle. More specifically, the stitching unit 62 includes a stitching machine driving motor 62d (see FIG. 1 ) for driving a stitching portion 62a. Figure 11 Then, the needle binding unit 62a uses the driving force of the needle binding machine driving motor 62d to make the binding needles loaded in the needle binding unit 62a penetrate the paper bundle Pb to bind the paper bundle Pb. Since the structure of the needle binding unit 62 is well known, a detailed description is omitted.

[0133] In addition, if Figure 9 As shown, the stitching unit 155 includes a stitching unit moving mechanism 77. The stitching unit moving mechanism 77 moves the stitching unit 155 in the main scanning direction along the downstream end portion of the paper P or paper bundle Pb loaded on the inner tray 22 in the conveyance direction. The stitching unit moving mechanism 77 includes, for example, a base member 78, a guide shaft 49, a stitching unit moving motor 80, and a driving force transmission mechanism 81. The driving force transmission mechanism 81 transmits the driving force of the stitching unit moving motor 80 to the base member 78 via pulleys 81a and 81b, a timing belt 81c, and a fastening portion 78a that fastens the base member 78 and the timing belt 81c. Furthermore, a stitching unit rotating shaft 83 having a driving force transmission gear 83a is fixed to the bottom surface of the stitching frame 62b that holds the components of the stitching unit 62.

[0134] The stitching unit rotation shaft 83 and the drive transmission gear 83a are held on the base member 78, which is provided with the stitching frame 62b, so as to be rotatable in both forward and reverse directions. Furthermore, the drive transmission gear 83a meshes with the output gear 82a of the stitching unit rotation motor 82. The driving force of the stitching unit rotation motor 82 is then transmitted to the stitching unit rotation shaft 83 via the output gear 82a and the drive transmission gear 83a. As a result, the stitching unit 62 is configured on the base member 78 to be rotatable in both forward and reverse directions about the stitching unit rotation shaft 83.

[0135] The end-stitching unit 25 and the needle-stitching unit 155 are supported by a common guide shaft 49. Specifically, the end-stitching unit moving mechanism 57 and the needle-stitching unit moving mechanism 77 move the end-stitching unit 25 and the needle-stitching unit 155 in the main scanning direction along the common guide shaft 49. Furthermore, the end-stitching unit moving mechanism 57 and the needle-stitching unit moving mechanism 77 can independently move the end-stitching unit 25 and the needle-stitching unit 155, respectively.

[0136] Figure 10 The figure shows a needle binding processing unit 155' which is a modified example of the needle binding processing unit 155, and is a schematic diagram of the needle binding processing unit 155' viewed from the upstream side in the conveying direction. The needle binding processing unit 155' is different from the needle binding processing unit 155 in that it has not only the needle binding unit 62 but also the second liquid applying unit 612. Figure 10 As shown, the needle binding processing section 155' includes a second liquid applying section 612 and a needle binding unit 62. The second liquid applying section 612 and the needle binding unit 62 are arranged adjacent to each other in the main scanning direction on the downstream side of the inner tray 22 in the conveyance direction.

[0137] The second liquid applying unit 612 applies the liquid stored in the third liquid tank 73 to the paper P or paper bundle Pb placed on the inner tray 22. The predetermined area including the position where the second liquid applying unit 612 applies the liquid to the paper P or paper bundle Pb corresponds to the binding position where the stapling unit 62 is to perform stapling. Figure 10 As shown, the second liquid applying part 612 includes a second lower pressing plate 63, a second upper pressing plate 64, a second liquid applying part moving mechanism 65, and a second liquid applying mechanism 66. The second liquid applying part moving mechanism 65 includes, for example, a second liquid applying part moving motor 67, a second trapezoidal screw 68, a second nut 69, a second base plate 70, second columnar members 711a, 711b, and second coil springs 721a, 721b.

[0138] The second liquid imparting mechanism 66 includes a third liquid tank 73, a second liquid supply component 75, a second liquid imparting component 74, and a second joint 76. Figure 3 and Figure 4 The liquid applying mechanism (first liquid tank 44, liquid supply member 50, liquid applying member 501, holding member 37) of the liquid applying unit 31 described in the previous section is common, so further description is omitted. Figure 9 The same as above, so the detailed description is omitted. In addition, the rotation mechanism of the second liquid imparting part 612 (liquid imparting part rotation motor 563, output gear 563a, drive transmission gear 562a, liquid imparting part rotation shaft 562) is the same as above. Figure 3The rotation mechanism of the liquid applying portion 31 shown is common, and therefore repeated description thereof will be omitted.

[0139] like Figure 10 As shown in the needle binding processing unit 155 ′, during the needle binding process, liquid can be applied to the paper P to soften the binding position, making it easier for the binding needle to penetrate. This can increase the number of bound sheets per bundle of paper Pb compared to the case of performing the needle binding process without applying liquid.

[0140] [Control module of post-processing device 3]

[0141] Next, use Figure 11 The control block structure of the post-processing device 3 will be described. Figure 11 FIG. 1 is a diagram showing a hardware configuration for executing control processing in the post-processing device 3. Figure 11 As shown, the post-processing device 3 includes a CPU (Central Processing Unit) 101 , a RAM (Random Access Memory) 102 , a ROM (Read Only Memory) 103 , an HDD (Hard Disk Drive) 104 , and an I / F 105 connected via a common bus 109 .

[0142] The CPU 101 is a computing device that controls the overall operation of the post-processing device 3. The RAM 102 is a volatile storage medium capable of high-speed data read and write operations and serves as a work area for the CPU 101 when processing information. The ROM 103 is a read-only non-volatile storage medium that stores programs such as firmware. The HDD 104 is a non-volatile storage medium with a large data storage capacity capable of reading and writing information and stores the OS (operating system), various control programs, and application programs.

[0143] The post-processing device 3 uses the computing capabilities of the CPU 101 to process control programs stored in the ROM 103 and information processing programs (application programs) loaded from storage media such as the HDD 104 into the RAM 102. This processing forms a software control unit comprising various functional modules of the post-processing device 3. The combination of this software control unit and the hardware resources mounted on the post-processing device 3 forms the functional blocks that implement the functions of the post-processing device 3. Specifically, the CPU 101, RAM 102, ROM 103, HDD 104, and I / F 105 constitute the control unit 100b (control unit) that controls the operation of the post-processing device 3.

[0144] I / F105 is an interface that connects the conveying roller pair 10, 11, 14, 15, the switching component 20, the side guards 24L, 24R, the contact / separation motor 32d, the crimping portion rotating motor 56, the liquid applying portion moving motor 42, the liquid applying portion rotating motor 563, the end binding processing portion moving motor 55, the needle binding machine drive motor 62d, the needle binding portion rotating motor 82, the needle binding processing portion moving motor 80, the liquid supply pump 46, the moving sensor 40a, the first liquid level sensor 43, the second liquid level sensor 94, the setting detection sensor 51, the standby position sensor 44a, the second encoding sensor 541, and the operation panel 110 to the common bus 109.

[0145] The control unit 100 controls the operation of the conveying roller pairs 10, 11, 14, 15, the switching member 20, the side fences 24L, 24R, the contact / separation motor 32d, the crimping unit rotation motor 56, the liquid applying unit movement motor 42, the liquid applying unit rotation motor 563, the end stapling unit movement motor 55, the stapler drive motor 62d, the stapler rotation motor 80, and the liquid supply pump 46 via the I / F 105. In addition, the control unit 100b obtains the detection results of the movement sensor 40a, the first liquid level sensor 43, the second liquid level sensor 94, the setting detection sensor 51, the standby position sensor 540, and the encoder sensor 541. In addition, Figure 11 3 , the end stapling unit 25 and the components related to the needle stapling unit 155 are shown in the figure, but the components related to the saddle stitching unit 28 that performs the saddle stitching process are also controlled by the control unit 100 b.

[0146] like Figure 1 As shown, the image forming device 2 has an operation panel 110. The operation panel 110 includes an operation unit that accepts input operations from the user and a display (notification unit) that notifies the user of information. The operation unit includes, for example, hard keys, a touch panel superimposed on the display, etc. Then, the operation panel 110 obtains information from the user through the operation unit and provides information to the user through the display. In addition, a specific example of the notification unit is not limited to a display, and may also be an LED light or a speaker, etc. In addition, the post-processing device 3 may also have the same operation panel 110 as described above.

[0147] As described above, the post-processing device 3 realizes the function of controlling the operation related to liquid application by software (control program) executed by the CPU 101 using the hardware resources included in the control unit 100 b .

[0148] Alternatively, the post-processing device 3 may perform liquid application in a manner such that the needle stapling unit 155 includes only the needle stapling means 62, and liquid application may be performed using the liquid application unit 31 included in the end stapling unit 25. Conversely, the end stapling unit 25 may include only the pressure-bonding unit 32, and liquid application may be performed using the second liquid application unit 612. In other words, regardless of the type of stapling process, liquid application may be performed by only the liquid application unit 31 or the second liquid application unit 612.

[0149] The stitching unit 62 and the second liquid applying unit 612 are integrally configured and move along the guide shaft 49, but the present invention is not limited thereto. For example, the stitching unit 62 and the second liquid applying unit 612 may be independently movable.

[0150] [Explanation of Binding Processing]

[0151] Next, the flow of the binding process executed by the edge binding processing unit 25 included in the post-processing apparatus 3 will be described. Figure 12 The flowchart shown is when one-stage binding processing is executed. Figure 13 FIG. 2 is a diagram showing the transition of the position of the end binding processing unit 25 (liquid applying unit 31 and pressure contact unit 32) during the execution of one binding process. Figure 13 In the figure, the changes in the posture of the liquid applying unit 31 and the crimping unit 32 are omitted. The position where the liquid applying unit 31 applies liquid to the paper P or paper bundle Pb (the liquid applying position) corresponds to the predetermined binding position where the crimping unit 32 crimps the paper bundle Pb. Therefore, the liquid applying position and the binding position are denoted by the same reference numerals (B1, B2) in the following description.

[0152] The control unit 100b starts the binding process when, for example, an instruction to execute the binding process (hereinafter referred to as a "binding process unit instruction") is received from the image forming apparatus 2. Figure 12 Binding process shown.

[0153] The binding processing instruction includes, for example, the type of paper P (information such as the material or thickness that affects the spread of the liquid), the number of sheets of paper P constituting the paper bundle Pb (hereinafter referred to as the "predetermined number of sheets"), the number of sheets of the paper bundle Pb to be bound (hereinafter referred to as the "required number"), the binding position of the paper bundle Pb, and the binding posture of the end binding processing unit 25. In addition, Figure 13 As shown in FIG. 5A , at the start of the binding process, the liquid applying section 31 and the pressure contact section 32 are in the parallel binding posture and are located at the standby position HP, which is offset in the width direction from the paper P placed on the inner tray 22 .

[0154] First, when the posture indicated by the binding processing instruction is the "oblique binding posture," the control unit 100b drives the liquid applying unit moving motor 563 and the crimping unit rotating motor 56 to rotate the liquid applying unit 31 and the crimping unit 32 constituting the end binding processing unit 25 to the oblique binding posture (S901). Furthermore, in the case of the "oblique binding posture," only the crimping unit 32 may be rotated to the oblique binding posture without rotating the liquid applying unit 31. This simplifies the drive mechanism compared to rotating the liquid applying unit 31 and the crimping unit 32 together in the forward and reverse directions, thereby achieving cost reduction, miniaturization of the device, and reduced malfunctions of the device.

[0155] On the other hand, when the posture instructed by the binding processing instruction is the "parallel binding posture", the control unit 100b omits the operation of rotating the liquid applying unit 31 and the crimping unit 32 constituting the edge binding processing unit 25 to the oblique binding posture.

[0156] The control unit 100b drives the end stapling unit movement motor 55 to move the end stapling unit 25 in the main scanning direction so that the liquid applying unit 31 faces the first liquid applying position B1 indicated by the stapling process command (S901). Furthermore, the control unit 100b executes step S901 before the first sheet of paper P is conveyed to the internal tray 22 by the conveying roller pairs 10, 11, 14, and 15.

[0157] Next, the control unit 100b rotates the transport roller pairs 10, 11, 14, and 15 to store the paper P, on which an image has been formed, in the internal tray 22 (S902). Furthermore, the control unit 100b moves the side fences 24L and 24R to align the positions of the paper P or paper bundle Pb placed on the internal tray 22 in the main scanning direction, a process known as alignment (S902).

[0158] Next, the control unit 100b controls the liquid applying unit 31 facing the first liquid applying position B1 to apply liquid to the first liquid applying position B1 of the paper P placed on the inner tray 22 in the previous step S902 (S903). That is, the control unit 100b drives the liquid applying unit moving motor 42 so that the liquid applying member 501 contacts the first liquid applying position B1 of the paper P placed on the inner tray 22 (see Figure 13(B)). In the liquid application process of step S903, the control unit 100b adjusts the position at which the liquid application member 501 applies liquid to the paper P based on the type of paper P and the binding position included in the binding process instruction. Furthermore, the control unit 100b adjusts the amount by which the liquid application member 501 is pressed against the paper P. Specifically, the control unit 100b controls the driving of the liquid application member movement motor 42 based on the adjusted control data, thereby adjusting the amount by which the liquid application member 501 is moved relative to the first liquid application position B1 of the paper P placed on the inner tray 22.

[0159] Next, the control unit 100b determines whether the number of sheets P placed on the internal tray 22 has reached the specified number N indicated by the stapling process instruction (S904). If the control unit 100b determines that the number of sheets P placed on the internal tray 22 has not reached the specified number N (S904: No), it repeats the processes of steps S902 to S904 until the number of sheets P placed on the internal tray 22 reaches the specified number N (S904: Yes). Specifically, the control unit 100b executes the processes of steps S902 to S904 each time the sheets P are conveyed to the internal tray 22 by the conveyance roller pairs 10, 11, 14, and 15. Furthermore, the liquid application unit 31 may apply liquid not only to all of the multiple sheets P constituting the paper bundle Pb, but also to only a portion of the sheets P.

[0160] Then, when the control unit 100b determines that the number of sheets of paper P placed on the internal tray 22 has reached a predetermined number (S904: Yes), Figure 13 As shown in (C), the end binding processing unit moving motor 55 is driven to move the end binding processing unit 25 in the main scanning direction so that the pressure contact unit 32 faces the first binding position B1 (S905).

[0161] Next, the control unit 100b causes the crimping unit 32 to perform crimping and stapling on the paper bundle Pb placed on the inner tray 22 (S906). The control unit 100b then causes the conveyor roller pair 15 to discharge the paper bundle Pb, which has been crimped and stapled by the crimping unit 32, to the second discharge tray 26 (S907). Specifically, the control unit 100b drives the contact / separation motor 32d, causing the upper crimping teeth 32a and lower crimping teeth 32b to clamp the paper bundle Pb placed on the inner tray 22 at the first stapling position B1. This causes the paper bundle Pb to be deformed and press-stapled between the upper crimping teeth 32a and lower crimping teeth 32b. The control unit 100b then rotates the conveyor roller pair 15 to discharge the crimped and stapled paper bundle Pb to the second discharge tray 26.

[0162] Furthermore, on the paper bundle Pb placed on the inner tray 22, the crimping area (equivalent to the first binding position B1) held between the upper crimping teeth 32a and the lower crimping teeth 32b in step S906 overlaps the liquid application area (equivalent to the first liquid application position B1) contacted by the tip of the liquid application member 501 in step S903. In other words, the crimping section 32 performs crimping and binding on the area of ​​the paper bundle Pb placed on the inner tray 22 where liquid has been applied by the liquid application section 31. Furthermore, the crimping area held between the upper crimping teeth 32a and the lower crimping teeth 32b does not need to completely overlap with the liquid application area contacted by the tip of the liquid application member 501; sufficient binding strength can be achieved even with a partial overlap.

[0163] Next, the control unit 100b determines whether the number of paper bundles Pb discharged to the second discharge tray 26 has reached the required number of copies M indicated by the stapling processing instruction (S908). The control unit 100b determines whether the number of paper bundles Pb discharged to the discharge tray 26 has reached the required number of copies M indicated by the stapling processing instruction (S908: No), and executes the process from step S901 onward again. In other words, the control unit 100b repeatedly executes the process from steps S901 to S908 until the number of paper bundles Pb discharged to the second discharge tray 26 reaches the required number of copies M (S908: Yes).

[0164] On the other hand, when the control unit 100b determines that the number of copies of the paper bundle Pb discharged to the second discharge tray 26 has reached the required number M (S908: Yes), it drives the end stapling processing unit moving motor 55, as shown in FIG. Figure 13 As shown in (A), the end binding processing unit 25 (liquid supply unit 31 and crimping unit 32) is moved to the standby position HP (S909). In addition, when the posture indicated by the binding processing instruction is the "oblique binding posture", the control unit 100b drives the liquid applying unit moving motor 563 and the crimping unit rotating motor 56 to rotate the liquid applying unit 31 and the crimping unit 32 to the parallel binding posture (S909). On the other hand, when the posture indicated by the binding processing instruction is the "parallel binding posture", the action of rotating the liquid applying unit 31 and the crimping unit 32 to the parallel binding posture is omitted. As a result, the end binding processing unit 25 (liquid applying unit 31 and crimping unit 32) returns to the standby position HP. Figure 13 In addition, in steps S901 and S909, the order of moving the liquid applying portion 31 and the pressing portion 32 in the main scanning direction and rotating them in the forward and reverse directions is not limited to the above order, and may be the reverse order.

[0165] [Detailed Description of the Second Liquid Storage Tank 47]

[0166] Next, use Figure 14 and Figure 15 The arrangement and configuration of the second tank 47 in the post-processing device 3 will be described. Figure 14 The figure shows an example of the arrangement and configuration of the second reservoir tank 47 serving as a main tank. Figure 14 (A) illustrates a state where the access cover 71 constituting a part of the device housing of the post-processing device 3 is opened. Figure 14 (B) is a sectional view of the post-processing device 3 as viewed from the side, illustrating a state where the openable and closable cover 71 of the post-processing device 3 is closed. Figure 14 As shown in (A), the second tank 47 is provided in a position where it can be operated after the opening and closing cover 71 of the post-processing device 3 is opened. Figure 14 As shown in (B), the second liquid tank 47 and the second liquid tank fixing portion 61 are arranged on the front side in the depth direction (X direction) of the post-processing device 3. In addition, the first liquid tank 44 and the like are arranged on the back side in the depth direction (X direction) of the post-processing device 3. Then, between the arrangement position of the second liquid tank 47 and the second liquid tank fixing portion 61 and the arrangement position of the first liquid tank 44 and the like, a main body side plate 72 of the post-processing device 3 is provided. The second liquid tank fixing portion 61 is mounted on the main body side plate 72 of the post-processing device 3. In addition, the main body side plate 72 is a part of the device housing and corresponds to the portion forming the locking hole (engaged portion) of the locking mechanism described later.

[0167] Figure 15 The second tank 47 is shown as being removable relative to the second tank fixing portion 61. Figure 15 As shown in (A), the second liquid tank 47 is configured to be removable in order to replenish the liquid to the first liquid tank 44. Figure 15 As shown in FIG. 5(B) , the second tank fixing portion 61 is provided with a setting detection sensor 51 (setting detection means) for detecting that the second tank 47 is set on the second tank fixing portion 61 .

[0168] When the installation detection sensor 51 detects the installation state of the second tank 47 with respect to the second tank fixing portion 61 (refer to Figure 15 (C)), a signal notifying the situation is notified to the control unit 100b. Thus, the control unit 100b is configured to be able to detect whether the second tank 47 is set on the second tank fixing portion 61.

[0169] Furthermore, the second tank fixing portion 61 is provided with a second liquid level sensor 94 (second liquid detection means) for detecting the amount (liquid level) of the stored liquid L. The output value (voltage) of the second liquid level sensor 94 is communicated to the control unit 100b. The control unit 100b then determines whether the amount of liquid stored in the second tank fixing portion 61 meets the required level by evaluating the output value (voltage) of the second liquid level sensor 94. If the control unit 100b determines, based on the output signal of the installation detection sensor 51, that the second tank 47 is installed, it energizes the second liquid level sensor 94, enabling detection of the presence (liquid level) of liquid within the second tank fixing portion 61.

[0170] In addition, the structure of the second liquid storage tank 47 is that when it is not set in the state of the second liquid storage tank fixing part 61 (unset state), the outlet is blocked by the liquid supply valve 471, and the liquid does not leak. Figure 15 As shown in FIG. 4A and FIG. 4B , when the second reservoir tank 47 is mounted on the second reservoir tank fixing portion 61, the liquid supply valve 471 is pushed up, and the liquid discharge port 471a of the second reservoir tank 47 is opened, causing liquid to flow from the second reservoir tank 47 to the second reservoir tank fixing portion 61. As a result, the liquid stored in the second reservoir tank 47 flows out of the second reservoir tank fixing portion 61. The liquid flowing out of the second reservoir tank 47 is stored in the second reservoir tank fixing portion 61.

[0171] Furthermore, as a measure to prevent liquid freezing during maintenance of the post-processing device 3 or during liquid drainage, a "liquid drainage process" is sometimes performed to drain the liquid within the post-processing device 3. During this process, the liquid remaining in the first reservoir 44 and the liquid supply path 45 is fed in the opposite direction via the liquid supply path 45 to the second reservoir fixing portion 61 by the liquid supply pump 46. Therefore, the second reservoir fixing portion 61 is configured to hold the liquid within the first reservoir 44 and the liquid supply path 45. Furthermore, a drain plug 611 is provided within the second reservoir fixing portion 61. The liquid remaining in the first reservoir 44 and the liquid supply path 45 is fed in the opposite direction to the second reservoir fixing portion 61 by the liquid supply pump 46. The drain plug 611 is then opened to drain the liquid within the second reservoir fixing portion 61 from within the post-processing device 3.

[0172] [Overall Flow of Liquid Supply and Discharge Operations in the Liquid Applying Unit 31]

[0173] then, Figure 16This flowchart illustrates the control flow of the liquid supply and discharge operation in the liquid application unit 31 of the end stapling processing unit 25 (hereinafter referred to as the "liquid supply and discharge operation flow") executed by the control unit 100b. Here, the "liquid supply and discharge operation" refers to the transfer of liquid for liquid application between the second liquid tank 47 and the first liquid tank 44 by the liquid supply pump 46. Specifically, the "liquid supply and discharge operation" includes both the operation of supplying (replenishing) liquid from the second liquid tank 47 to the first liquid tank 44 by the liquid supply pump 46, and the operation of supplying (discharging) liquid from the first liquid tank 44 to the second liquid tank 47 by the liquid supply pump 46.

[0174] First, when the liquid supply and discharge process starts, the control unit 100b Figure 15 As shown, the control unit 100b determines whether the removable second liquid tank 47 is installed in the second tank fixing portion 61 (whether the installation detection sensor 51 is in the ON state) and whether there is sufficient liquid L stored in the second tank fixing portion 61 (whether the output value of the second liquid level sensor 94 is greater than the threshold value) (S1301). If the control unit 100b determines that the second liquid tank 47 is not properly installed (the installation detection sensor 51 is in the OFF state) and that there is insufficient liquid L stored in the second tank fixing portion 61 (the output value of the second liquid level sensor 94 is less than the threshold value) (S1301: No), the liquid supply pump 46 may not be able to properly supply liquid from the second liquid tank 47 to the first liquid tank 44 due to, for example, depletion of liquid in the second tank fixing portion 61. Therefore, the control unit 100b outputs a request to install the second liquid tank 47 via the operation panel 110 (S1310), and the liquid supply and discharge operation flow ends.

[0175] On the other hand, when the second liquid tank 47 is set (the detection sensor 51 is set to the ON state) and sufficient liquid L is stored in the second liquid tank fixing part 61 (the output value of the second liquid level sensor 94 is above the threshold) (S1301: Yes), the control unit 100b then sets the operation mode of the liquid supply pump 46.

[0176] The liquid supply pump 46 can change the liquid supply speed (liquid supply mode). The liquid supply speed can be changed by selecting and setting any one of multiple operation modes. The multiple liquid supply modes provided by the liquid supply pump 46 include, for example, a "high-speed liquid supply mode" and a "low-speed liquid supply mode."

[0177] The control unit 100b determines whether high-speed liquid supply is being performed by the liquid supply pump 46, that is, whether the high-speed liquid supply mode is set (S1302). In step S1302, if it is determined that high-speed liquid supply is being performed (S1302: Yes), the control unit 100b sets the operating speed of the liquid supply pump 46 to high speed (S1303). When the high-speed liquid supply mode is set, for example, when the liquid stored in the first liquid tank 44 is empty, liquid is supplied from the second liquid tank 47 to the first liquid tank 44 via the liquid supply pump 46. In this case, since it takes time to complete the liquid supply to the first liquid tank 44, the control unit 100b sets the liquid supply speed (liquid supply pump operating speed) of the liquid supply pump 46 to high speed to shorten the liquid supply time to the first liquid tank 44.

[0178] On the other hand, if it is determined in step S1302 that high-speed liquid supply is not being performed, that is, if the low-speed liquid supply mode is set (S1302: No), the control unit 100b sets the operating speed of the liquid supply pump 46 to a low speed (S1304). When the low-speed liquid supply mode is set, for example, when the liquid supply operation of the liquid applying unit 31 consumes the amount of liquid stored in the first liquid tank 44, the liquid supply pump 46 supplies an amount of liquid equivalent to the consumed liquid from the second liquid tank 47 to the first liquid tank 44. In this case, since a small amount of liquid is being supplied, if high-speed supply is used, there is a risk that the liquid will overflow from the first liquid tank 44 due to oversupply. Considering these side effects, it is sometimes preferable to set the liquid supply speed (liquid supply pump operating speed) of the liquid supply pump 46 to a low speed.

[0179] As a prerequisite for the determination process in step S1302, the liquid supply speed of the liquid supply pump 46 may be arbitrarily selected by the user via the operation panel 110. Alternatively, the liquid supply speed of the liquid supply pump 46 corresponding to a liquid supply and discharge mode such as a "filling supply operation" and an "additional supply operation" described later may be pre-set, and the control unit 100b may automatically select the liquid supply speed of the liquid supply pump 46 corresponding to each liquid supply and discharge mode based on the selection of each liquid supply and discharge mode.

[0180] Next, the control unit 100b determines the liquid supply and discharge mode (S1305). The determination of the liquid supply and discharge mode is based on, for example, the following Figure 17 The operation status of the post-processing device 3 shown ("post-processing operation status") and / or the user's Figure 25 The input results of the liquid feeding and discharge mode selection input screen shown are performed.

[0181] First, in step S1305, the control unit 100b determines whether the liquid supply and discharge mode is "filling and supplying operation." If the liquid supply and discharge mode is "filling and supplying operation" (S1305: Yes), the control unit 100b causes the liquid applying unit 31 to perform the "filling and supplying operation" (S1306), which will be described later, and ends the liquid supply and discharge operation flow. On the other hand, if the result of step S1305 is not "filling and supplying operation" (S1305: No), the control unit 100b then determines whether the liquid supply and discharge mode is "additional supplying operation" (S1307).

[0182] If the liquid supply and discharge mode is determined to be "additive supply operation" (S1307: Yes), the control unit 100b causes the liquid applying unit 31 to perform the "additive supply operation" (S1308), which will be described later, and the liquid supply and discharge operation flow ends. On the other hand, if the result of step S1307 is not "additive supply operation" (S1307: No), the control unit 100b determines that the liquid supply and discharge mode is "liquid discharge operation" and causes the liquid applying unit 31 to perform the "liquid discharge operation" (S1309), which will end the liquid supply and discharge operation flow.

[0183] In addition, details of "filling supply control", "additional supply control" and "liquid discharge control" as controls corresponding to the liquid supply and discharge mode (the above-mentioned liquid supply and discharge operations) selected based on the judgment results of steps S1305 and S1307 will be described later.

[0184] Next, the actions that can be performed in the post-processing device 3 are described. For example, in the case of performing crimping binding with liquid application by the crimping portion 32, a control method for selecting the liquid supply and discharge mode that is most suitable for each process of the crimping binding process with liquid application from a plurality of liquid supply and discharge modes set corresponding to the plurality of processes of the crimping binding process with liquid application is described.

[0185] Figure 17 The correspondence between the operating state of the post-processing device 3 (hereinafter referred to as “post-processing operating state”) when the post-processing device 3 performs the liquid supply and discharge operation and the supply and discharge mode selected accordingly is illustrated.

[0186] For example, in the "post-processing action status", there are distinctions such as "when the post-processing device is started" (when the power of the post-processing device 3 is turned on or when it is restored from the energy-saving mode, etc.), "when the compression binding process starts", "when the compression binding process ends", and "when on standby".

[0187] In addition, the “compression binding process” in the above-mentioned “when the compression binding process starts” and “when the compression binding process ends” refers to the compression binding process accompanied by the application of liquid.

[0188] When the post-processing device 3 initiates the press-stitching process, such as when the post-processing device is activated or when the press-stitching process begins, the "filling and supplying operation" is selected as the liquid supply and discharge mode. For example, if the press-stitching process with liquid application is frequently performed and the wait time until liquid application is ready is desired, the filling and supplying operation can also be performed upon activation of the post-processing device 3. Alternatively, if the press-stitching process with liquid application is infrequent and it is desired to prevent evaporation of liquid while the end stapling unit 25 is not operating, the filling and supplying operation can be performed each time the press-stitching process with liquid application begins.

[0189] In "at the end of the compression binding process" or "at the standby state", "additional supply action" is selected as the liquid supply and discharge mode. For example, at the end of the compression binding process accompanied by liquid application, the addition supply action is performed for the liquid application in the next compression binding process accompanied by liquid application. The addition supply action is an action performed for the purpose of supplying (replenishing) the amount of liquid consumed by the liquid application in the compression binding process accompanied by the completed liquid application into the first liquid storage tank 44. In addition, the addition supply action is also performed in the case of shortening the waiting time until the start of liquid application in the compression binding process accompanied by the next liquid application. Furthermore, in the case where the standby state of the post-processing device 3 continues for a specified time and the liquid in the first liquid storage tank 44 evaporates, the addition supply action is also performed for the purpose of supplying (replenishing) the amount of liquid reduced due to the evaporation to the first liquid storage tank 44.

[0190] In addition to the above, the user may select the liquid supply mode via the operation panel 110 provided on the image forming apparatus 2 and / or the post-processing apparatus 3 , thereby manually and selectively executing the above-mentioned filling and supplying operations.

[0191] [Filling supply action]

[0192] Then, use Figure 18 An overview of the filling and supplying operation, which is one of the liquid supply and discharge modes, will be described. Figure 18 The first liquid storage tank 44 shown in (A) is an example of a state in which the liquid is empty. Figure 18As shown in FIG. 4B , liquid is supplied from the second liquid tank 47 to the first liquid tank 44 by the liquid supply pump 46. At this time, liquid is supplied from the second liquid tank 47 to the first liquid tank 44 by the liquid supply pump 46 before the first liquid level sensor 43 detects the liquid in the first liquid tank 44. The liquid level (the amount of liquid in the first liquid tank 44) at which the first liquid level sensor 43 detects the liquid in the first liquid tank 44 is used as the "reference liquid level."

[0193] After that, the liquid stored in the first liquid tank 44 is sucked up by the capillary effect of the liquid supply member 50. As a result, the liquid level of the liquid stored in the first liquid tank 44 becomes lower than the reference liquid level (see Figure 18 (C)). In order to return the liquid level of the liquid stored in the first liquid tank 44 to the reference liquid level again when the liquid level in the first liquid tank 44 drops, the liquid supply pump 46 is used to supply liquid from the second liquid tank 47 to the first liquid tank 44 as needed (see Figure 18 (D)).

[0194] In this embodiment, an electrode sensor is used as an example of the first liquid level sensor 43 , but this is not limiting and other sensors are also possible. For example, a float sensor or an electrostatic capacitance sensor can be used to detect the presence of liquid. Furthermore, the first liquid level sensor 43 only needs to be able to detect the presence of liquid (liquid volume) in the first liquid storage tank 44 . Alternatively, the first liquid level sensor 43 can detect the liquid level (liquid surface) by detecting the presence of liquid (liquid volume) in the first liquid storage tank 44 .

[0195] Furthermore, when using an electrode sensor as the first liquid level sensor 43, if a voltage is constantly applied to the pair of electrodes (constantly energized), there is a risk of galvanic corrosion in the metal used for the electrodes, leading to corrosion. Furthermore, since voltage is constantly applied to the liquid stored in the first liquid tank 44, there is also a concern that electrolysis of the liquid may occur, or foreign matter may adhere to the electrode surfaces due to electrolysis, leading to electrode dissolution and other conditions that may induce electrode degradation. Therefore, the control unit 100b does not constantly energize the first liquid level sensor 43. Instead, it controls the energization timing of the first liquid level sensor 43, energizing it (turning it on) only when detecting the amount (liquid level) of the liquid stored in the first liquid tank 44.

[0196] [Control flow of filling supply operation]

[0197] Figure 19 FIG. 1 is a flow chart showing a control flow of a filling supply operation (hereinafter referred to as a “filling supply control flow”) as an example of a liquid supply operation executed in the control unit 100b. Figure 17As shown, the filling and supplying operation is performed when the post-processing device 3 is activated and the compression binding process involving the application of liquid begins.

[0198] When the post-processing device 3 is activated, the filling and supply control process begins. When the filling and supply control process begins, the image forming device 2 instructs the control unit 100b to request confirmation of the presence of liquid (S1601). Alternatively, the instruction to request confirmation of the presence of liquid may be based on information input by a user via the operation panel 110 provided in the image forming device 2 and / or the post-processing device 3. Upon receiving the instruction to request confirmation of the presence of liquid from the image forming device 2, the control unit 100b applies a voltage to the first liquid level sensor 43 (turns it on) (S1602).

[0199] Next, the control unit 100b determines the presence of liquid (liquid volume) in the first liquid tank 44 by obtaining the output value (voltage) output by the first liquid level sensor 43 when it detects liquid in the first liquid tank 44 (S1603). The presence of liquid (liquid volume) in the first liquid tank 44 is determined based on whether the output value (voltage) from the first liquid level sensor 43 exceeds a preset "liquid detection threshold" (threshold value). For example, if the output value (voltage) of the first liquid level sensor 43 exceeds the liquid detection threshold (e.g., output voltage V1), the control unit 100b determines that the liquid volume in the first liquid tank 44 is sufficient (S1603: Yes). In this case, the control unit 100b stops applying voltage to the first liquid level sensor 43 (de-energizes it) (S1604), displays a notification indicating that liquid dispensing is complete on the operation panel 110, for example (S1605), and terminates the filling and supply control process.

[0200] On the other hand, in step S1603, when the output value (voltage) from the first liquid level sensor 43 is less than the liquid detection threshold (for example, the output voltage V1) (S1603: No), the control unit 100b activates the liquid supply pump 46 to execute the liquid supply from the second liquid storage tank 47 to the first liquid storage tank 44 (S1608).

[0201] Next, the control unit 100b determines whether the output value (voltage) from the first liquid level sensor 43 is greater than a preset "liquid detection threshold" (threshold value) (S1607). If the output value (voltage) from the first liquid level sensor 43 is greater than the liquid detection threshold (e.g., output voltage V1), the control unit 100b determines that a sufficient amount of liquid has been supplied from the second liquid tank 47 to the first liquid tank 44 by the liquid supply pump 46 (S1607: Yes). On the other hand, if the output value from the first liquid level sensor 43 is less than the liquid detection threshold (e.g., output voltage V1) (S1607: No), the control unit 100b determines whether the time elapsed since the start of operation of the liquid supply pump 46 (S1606) has not exceeded the abnormality determination time (T1 [Sec]) (S1616). When the aforementioned elapsed time does not exceed the abnormality determination time T1 (S1616: No), the control unit 100b continues the supply of liquid from the second liquid tank 47 to the first liquid tank 44 by the liquid supply pump 46 until the output value (voltage) from the first liquid level sensor 43 becomes above the liquid detection threshold (for example, the output voltage V1) (S1607: Yes).

[0202] On the other hand, if the elapsed time exceeds the abnormality determination time T1 (S1616: YES), the control unit 100b determines that some abnormality has occurred in the equipment (such as a failure of the liquid supply pump 46 and / or the first liquid level sensor 43) and executes an error stop process (S1618) to stop the liquid supply pump 46 and / or deenergize the first liquid level sensor 43. The control unit 100b then displays an abnormality notification on the operation panel 110 (S1619) and terminates the filling and supply control flow.

[0203] In step S1607, if the output value (voltage) from the first liquid level sensor 43 exceeds the liquid detection threshold (e.g., output voltage V1) (S1607: Yes), the control unit 100b stops the liquid supply pump 46, thereby stopping the supply of liquid from the second liquid tank 47 to the first liquid tank 44 (S1608). The control unit 100b then stops applying voltage to the first liquid level sensor 43 (turns off the power supply) (S1609).

[0204] Afterwards, the liquid supply component 50 sucks up the liquid in the first liquid storage tank 44 through capillary action, etc., and temporarily stops the filling supply control process (S1610) until a pre-set standby time (first prescribed time T0 [Sec]) has passed, in which the liquid imparting component 501 is in a state where liquid imparting is possible (a state in which liquid is sufficiently accumulated in the liquid imparting component 501 and / or the liquid supply component 50).

[0205] Then, after the first predetermined time T0 has elapsed, the control unit 100b turns on the first liquid level sensor 43 again (S1611), obtains the output value (voltage) output by the first liquid level sensor 43 when it detects liquid in the first liquid tank 44, and determines the presence of liquid (liquid storage amount) in the first liquid tank 44 (S1612). At this stage, the liquid level (liquid storage amount) in the first liquid tank 44 decreases due to the suction of the liquid supply component 50. However, if the output value (voltage) from the first liquid level sensor 43 exceeds the liquid detection threshold (e.g., output voltage V1) (S1612: Yes), the control unit 100b stops applying voltage to the first liquid level sensor 43 (turns it off) (S1604). The control unit 100b then displays a notification indicating that liquid dispensing preparation is complete, for example, on the operation panel 110 (S1605), terminating the filling and supply control process.

[0206] On the other hand, in step S1612, when the output value (voltage) from the first liquid level sensor 43 is less than the liquid detection threshold (for example, the output voltage V1) (S1612: No), the control unit 100b activates the liquid supply pump 46 to execute liquid supply from the second liquid storage tank 47 to the first liquid storage tank 44 (S1613).

[0207] Next, the control unit 100b obtains the output value (voltage) output by the first liquid level sensor 43 when it detects liquid in the first liquid tank 44, and determines the presence of liquid (liquid storage amount) in the first liquid tank 44 (S1614). If the output value (voltage) from the first liquid level sensor 43 is greater than the liquid detection threshold (e.g., output voltage V1) (S1614: Yes), the control unit 100b determines that a sufficient amount of liquid has been supplied to the first liquid tank 44. In this case, the control unit 100b stops the liquid supply pump 46, halting the supply of liquid from the second liquid tank 47 to the first liquid tank 44 (S1615). The control unit 100b then stops applying voltage to the first liquid level sensor 43 (de-energizing) (S1604), displays a notification indicating that liquid dispensing is complete, for example, on the operation panel 110 (S1605), and terminates the filling and supply control process.

[0208] On the other hand, if the output value (voltage) from the first liquid level sensor 43 is less than the liquid detection threshold value (e.g., output voltage V1) (S1614: No), the control unit 100b determines whether the time elapsed since the start of operation of the liquid supply pump 46 (S1613) has exceeded the abnormality determination time (T1 [sec]) (S1617). If the elapsed time has not exceeded the abnormality determination time T1 (S1617: No), the control unit 100b continues the supply of liquid from the second liquid tank 47 to the first liquid tank 44 by the liquid supply pump 46 until the output value (voltage) from the first liquid level sensor 43 reaches or exceeds the liquid detection threshold value (e.g., output voltage V1) (S1614: Yes).

[0209] On the other hand, if the elapsed time exceeds the abnormality determination time T1 (S1617: YES), the control unit 100b determines that a certain abnormality has occurred in the equipment and executes an error stop process (S1618) to stop the liquid supply pump 46 and / or de-energize the first liquid level sensor 43. The control unit 100b then displays an abnormality notification on the operation panel 110 (S1619), terminating the filling and supply control flow. The "abnormality notification" may be, for example, a warning displayed on the operation panel 110 urging inspection due to a potential malfunction of the liquid supply pump 46 and / or the first liquid level sensor 43.

[0210] By executing the filling and supply control process described above, the amount of liquid that can be supplied by the liquid supply unit 501 can be stably maintained at a constant amount in the liquid supply unit 50 and / or the liquid supply unit 501. As a result, the frequency of the liquid supply pump 46 supplying liquid from the second liquid tank 47 to the first liquid tank 44 can be reduced, thereby improving the efficiency of the liquid supply process.

[0211] Then, Figure 19 The filling supply control process described in Figure 18 The following describes an example of the liquid supply operation described in the previous section, namely, the filling supply operation. Figure 18 The state shown in (A) Figure 17Under the "post-processing device startup" condition, the control unit 100b turns on the power of the first liquid level sensor 43 (ON) (S1602), obtains the output value (voltage) output by the first liquid level sensor 43 when it detects the liquid in the first liquid tank 44, and determines whether there is liquid in the first liquid tank 44 (liquid storage amount) (S1603). At this stage, since the first liquid tank 44 is empty, the output value (voltage) from the first liquid level sensor 43 is less than the liquid detection threshold (for example, the output voltage V1). Therefore, the control unit 100b determines that the state in the first liquid tank 44 is a "no liquid" state (S1603: No), and drives the liquid supply pump 46 to execute the supply of liquid from the second liquid tank 47 to the first liquid tank 44 (S1606). Then, when it reaches Figure 18 When the state (B) is reached, the output value (voltage) from the first liquid level sensor 43 becomes greater than the liquid detection threshold value (e.g., output voltage V1) (S1607: Yes), so the control unit 100b turns off the power to the first liquid level sensor 43 (S1609) after stopping the liquid supply pump 46 (S1608).

[0212] Then, if Figure 18 As shown in (C), after the first predetermined time T0, which is the time required for the liquid supply component 50 to draw up liquid until the liquid applying component 501 is able to apply liquid, has elapsed, the control unit 100b turns on the first liquid level sensor 43 again (S1611). During this phase, the liquid supply component 50 draws up a predetermined amount of liquid from the first liquid tank 44. As a result, the amount of liquid in the first liquid tank 44 decreases, and the liquid level in the first liquid tank 44 falls below the reference level. Consequently, the output value (voltage) from the first liquid level sensor 43 becomes less than the liquid detection threshold (e.g., output voltage V1) (S1612: No).

[0213] Then, the control unit 100b activates the liquid supply pump 46 again (S1613), and supplies liquid from the second liquid tank 47 to the first liquid tank 44 until the output value (voltage) from the first liquid level sensor 43 becomes equal to or higher than the liquid detection threshold value (e.g., output voltage V1) (S1614: Yes). Then, when the output value (voltage) from the first liquid level sensor 43 becomes equal to or higher than the liquid detection threshold value (e.g., output voltage V1), the control unit 100b stops the liquid supply pump 46 (S1615), and then turns the first liquid level sensor 43 off (S1604). As a result, as Figure 18As shown in (D), since the liquid in the first liquid tank 44 is fully stored in the entire liquid supply component 50 and / or the liquid imparting component 501, the control unit 100b displays a notification of completion of liquid imparting preparation on the above-mentioned operation panel 110 (S1605).

[0214] As described above, the “filling and supplying operation” is a liquid supply and discharge mode executed when the liquid applying section 31 applies liquid. That is, in order to stably apply a constant amount of liquid to the paper P, a constant amount of liquid must always be stored in the liquid supply member 50 and / or the liquid applying member 501 .

[0215] However, when the first liquid tank 44 is empty, as when the post-processing device 3 is started, the first liquid level sensor 43 cannot detect the liquid (see Figure 18 (A)), it is necessary to supply liquid from the second liquid tank 47 to the first liquid tank 44 by the liquid supply pump 46 so that the liquid level (liquid storage amount) in the first liquid tank 44 becomes above the reference liquid level. In addition, when the liquid supply unit 31 (liquid supply component 501) supplies liquid to the paper P, the liquid storage amount in the first liquid tank 44 decreases and the liquid level in the first liquid tank 44 falls below the reference liquid level (see Figure 18 The same applies to (C). Specifically, the liquid supply pump 46 must supply liquid from the second liquid tank 47 to the first liquid tank 44 so that the liquid level (liquid storage amount) in the first liquid tank 44 is above the reference level. The liquid supply and discharge mode in which the liquid supply pump 46 supplies liquid from the second liquid tank 47 to the first liquid tank 44 is a "filling supply operation."

[0216] [Add supply action]

[0217] Next, the addition and supply operation as one of the liquid supply and discharge modes will be described. Figure 20 Shown is a summary of the add supply action.

[0218] The replenishment supply operation is a liquid supply and discharge mode in which liquid is applied to the paper P by the liquid applying unit 31, thereby consuming the liquid stored in the first tank 44. When the liquid level (liquid storage amount) in the first tank 44 falls below a reference level, liquid is supplied from the second tank 47 to the first tank 44. At this time, when the first level sensor 43 reaches a level where it no longer detects the liquid in the first tank 44, the liquid supply pump 46 is activated to supply liquid from the second tank 47 to the first tank 44 until the first level sensor 43 detects the liquid in the first tank 44 (the liquid level in the first tank 44 reaches the reference level).

[0219] The filling supply operation described above is a liquid supply operation for replenishing liquid to the liquid supply unit 50 when the liquid storage amount (liquid level) of the first liquid storage tank 44 decreases and the liquid supply unit 50 needs to be replenished with liquid (a state where the liquid for liquid supply is insufficient). On the other hand, the additional supply operation is a liquid supply operation for supplying liquid to the first liquid storage tank 44 when the liquid supply unit 50 retains liquid (a state where the liquid for liquid supply is insufficient). That is, assuming that the liquid level (liquid storage amount) of the liquid in the first liquid storage tank 44 is filled to a level above the reference liquid level (refer to Figure 18 (D)), when the liquid level (liquid storage amount) in the first liquid tank 44 drops to a state lower than the reference liquid level as a result of the liquid being consumed by the liquid supply (refer to Figure 20 In this case, the liquid supply pump 46 is activated to add the supply liquid from the second liquid tank 47 to the first liquid tank 44, as shown in FIG. Figure 20 As shown in (B), the liquid level (liquid storage amount) of the first liquid tank 44 has again reached or exceeded the reference liquid level. In other words, this is a liquid supply and discharge pattern in which liquid is supplied from the second liquid tank 47 to the first liquid tank 44 by the liquid supply pump 46 as the liquid in the first liquid tank 44 is consumed by liquid supply.

[0220] [Add control flow of supply action]

[0221] Figure 21 FIG. 1 is a flow chart showing an example of a control flow of an additional supply operation (hereinafter referred to as “additional supply control flow”) as an example of a liquid supply operation executed in the control unit 100b. Figure 17 As shown, the additional supply operation is performed when the crimping binding process of the crimping section 32 with liquid application is completed or when the post-processing apparatus 3 is on standby (eg, when the end binding section 25 is not operating).

[0222] For example, when the crimping and binding process of the crimping unit 32, which involves the application of liquid, is completed, the replenishment and supply control process begins. When the replenishment and supply control process begins, the image forming apparatus 2 instructs the control unit 100b to request confirmation of the presence of liquid (S1801). Alternatively, the instruction to request confirmation of the presence of liquid may be based on information input by a user via the operation panel 110 provided in the image forming apparatus 2 and / or the post-processing apparatus 3. Upon receiving the instruction to request confirmation of the presence of liquid from the image forming apparatus 2, the control unit 100b applies a voltage to the first liquid level sensor 43 (turns it on) (S1802).

[0223] Next, the control unit 100b obtains the output value of the first liquid level sensor 43 when it detects liquid in the first liquid tank 44, and determines the presence of liquid (liquid storage amount) in the first liquid tank 44 (S1803). The presence of liquid (liquid storage amount) in the first liquid tank 44 is determined based on whether the output value (voltage) from the first liquid level sensor 43 exceeds a preset "liquid detection threshold" (threshold value). For example, if the output value (voltage) of the first liquid level sensor 43 exceeds the liquid detection threshold (e.g., output voltage V1), the control unit 100b determines that the liquid storage amount in the first liquid tank 44 is sufficient (S1803: Yes). In this case, the control unit 100b stops applying voltage to the first liquid level sensor 43 (de-energizes it) (S1807), displays a notification indicating that liquid dispensing preparation is complete on the operation panel 110, for example (S1808), and terminates the addition and supply control process.

[0224] On the other hand, in step S1803, when the output value (voltage) from the first liquid level sensor 43 is less than the liquid detection threshold (for example, the output voltage V1) (S1803: No), the control unit 100b activates the liquid supply pump 46 to execute the liquid supply from the second liquid storage tank 47 to the first liquid storage tank 44 (S1804).

[0225] Next, the control unit 100b determines whether the output value (voltage) from the first liquid level sensor 43 is above a preset "liquid detection threshold" (threshold value) (S1805). If the output value (voltage) from the first liquid level sensor 43 is above the liquid detection threshold (e.g., output voltage V1), the control unit 100b determines that a sufficient amount of liquid has been supplied from the second liquid tank 47 to the first liquid tank 44 by the liquid supply pump 46 (S1805: Yes). The control unit 100b then stops the liquid supply pump 46, halting the supply of liquid from the second liquid tank 47 to the first liquid tank 44 (S1806). The control unit 100b then stops applying voltage to the first liquid level sensor 43 (de-energizing) (S1807), displays a notification indicating that liquid dispensing is complete, for example, on the operation panel 110 (S1808), and terminates the addition and supply control process.

[0226] On the other hand, if the output value from the first liquid level sensor 43 is less than the liquid detection threshold value (e.g., output voltage V1) (S1805: No), the control unit 100b determines whether the time elapsed since the start of operation of the liquid supply pump 46 (S1804) has not exceeded the abnormality determination time (T1 [sec]) (S1809). If the elapsed time has not exceeded the abnormality determination time T1 (S1809: No), the control unit 100b continues the supply of liquid from the second liquid tank 47 to the first liquid tank 44 by the liquid supply pump 46 until the output value (voltage) from the first liquid level sensor 43 reaches or exceeds the liquid detection threshold value (e.g., output voltage V1) (S1805: Yes).

[0227] On the other hand, if the elapsed time exceeds the abnormality determination time T1 (S1809: YES), the control unit 100b determines that one of the aforementioned abnormalities has occurred in the equipment and executes an error stop process (S1810) to stop the liquid supply pump 46 and / or deenergize the first liquid level sensor 43. The control unit 100b then displays an abnormality notification on the operation panel 110 (S1811) and terminates the refill control flow. The "abnormality notification" is the same as described above, and therefore its description is omitted.

[0228] [Control flow of supply operation during standby]

[0229] Next, use Figure 22 The control flow of the standby supply operation (hereinafter referred to as the "standby supply control flow") will be described. In the post-processing device 3, when the aforementioned liquid application and liquid supply operations are performed regularly, the amount of liquid stored in the first liquid tank 44 is maintained at an appropriate level. However, if the liquid application and / or liquid supply operations are not performed for an extended period, the liquid may evaporate, reducing the amount of liquid stored in the first liquid tank 44 or potentially leaving it empty.

[0230] As already explained, the liquid supply component 50 and / or the liquid applying component 501 are constructed of a liquid-absorbing material such as a sponge. Therefore, if the first liquid tank 44 is left empty for an extended period without liquid, the absorbed liquid will dry out. Once the liquid supply component 50 and / or the liquid applying component 501 (the absorbed liquid) has dried out, even if liquid is supplied to the first liquid tank 44 again, it will take considerable time for the liquid applying component 501 and / or the liquid applying component 501 to completely absorb the liquid. This results in increased user waiting time and reduced user convenience. Furthermore, if a binding process (press-stitch binding and / or needle-stitching) is performed before the liquid applying component 501 and / or the liquid applying component 501 has completely absorbed the liquid, insufficient liquid will be applied to the sheets P, resulting in poor binding and potentially reduced binding quality.

[0231] Therefore, during a certain period of time, when the liquid supply action is not performed (when on standby), in order to prepare for the next crimping binding process accompanied by liquid application, the liquid supply action is performed regularly to prevent the liquid applying component 501 and / or the liquid applying component 501 from drying out. As a result, the time taken for the liquid applying process of the liquid applying portion 31 to start in the next crimping binding process accompanied by liquid application can be shortened. Thus, by shortening the user's waiting time, the user's convenience can be improved. In addition, before the liquid applying component 501 and / or the liquid applying component 501 completes the absorption of liquid, the binding action (crimping binding process and / or needle binding process) accompanied by the liquid applying process is performed, which can reduce the binding defects caused by insufficient liquid application to the paper P, thereby improving the binding quality.

[0232] Figure 22 The flowchart shown is for the standby supply control process. When the standby supply control process begins, the control unit 100b measures the time elapsed since the completion of a liquid supply operation, such as a filling supply operation or an additional supply operation (hereinafter referred to as "post-liquid supply operation elapsed time") and monitors whether the post-liquid supply operation elapses past a second predetermined time (T2 [sec]), which serves as the elapsed time determination time (S1901). Monitoring continues until the post-liquid supply operation elapses past the second predetermined time T2 (S1901: No).

[0233] If the time elapsed after the liquid supply operation exceeds the second predetermined time T2 (S1901: YES), the control unit 100b executes the previously described additional supply control process (S1902), which controls the additional supply operation, and then terminates the standby supply control process. If a liquid supply operation occurs during the timer count, the timer is reset. The second predetermined time T2 is set based on the time required for the first liquid tank 44 to become empty when the device is not in the liquid supply operation state, taking into account the properties of the liquid stored in the first liquid tank 44.

[0234] [Liquid discharge operation and liquid discharge operation control flow]

[0235] Next, the liquid discharge control when controlling the liquid discharge operation executable in the post-processing device 3 will be described. Figure 23 This is a diagram for explaining an outline of a liquid discharge operation which is one of the liquid supply and discharge modes.

[0236] Figure 24The flowchart shown is an example of the control flow for the liquid discharge operation ("liquid discharge control flow"). Here, "liquid discharge operation" refers to the supply of liquid stored in the first liquid tank 44 to the second liquid tank 47 by the liquid supply pump 46. In other words, the liquid is supplied in the direction opposite to the direction of liquid supply in the aforementioned liquid supply operation.

[0237] When the post-processing device 3 is in use, although the first liquid storage tank 44, the liquid supply component 50 and / or the liquid applying component 501 are in a state of being filled with liquid, in order to prevent liquid leakage from the first liquid storage tank 44 when the liquid supply component 50 and / or the liquid applying component 501 are removed for maintenance, and to prevent contamination caused by liquid when the post-processing device 3 is not used for a long time, it is sometimes necessary to perform an operation to empty the first liquid storage tank 44 (the above-mentioned "liquid discharge process"). For example, in this case, the liquid discharge action is performed.

[0238] When "Liquid Discharge Operation" is selected as the liquid supply and discharge mode, the liquid discharge control process starts. When the liquid discharge control process starts, the control unit 100b drives (reverses) the liquid supply pump 46 for a predetermined time (Tr [sec]) (S2101) to suck up liquid from the first liquid tank 44 (refer to Figure 23 As a result, the liquid in the first tank 44 is sent to the second tank fixing portion 61, and the liquid is discharged from the first tank 44, and the first tank 44 becomes empty (see Figure 23 (B)). The predetermined time Tr, which serves as the operating time of the liquid supply pump 46, is set, for example, to the time required for the liquid in the first liquid tank 44, the liquid supply member 50, and / or the liquid applying member 501 to be fully discharged. The control unit 100b then terminates the liquid discharge control process after driving (reversing) the liquid supply pump 46 for only the predetermined time Tr.

[0239] In addition, as a liquid discharge mode, the "liquid discharge action" can also be controlled by the user. Figure 25 The operation screen of the operation panel 110 is exemplified and selected to execute. In addition, the user can also issue an instruction to execute "filling supply operation" or "additional supply operation" as a liquid feeding and discharge mode via the operation panel 110 at his / her discretion.

[0240] In addition, in the above description, Figure 1 As shown in FIG, the control unit 100b of the post-processing device 3 is described as being separately provided from the control unit 100a of the image forming device 2, but the present invention is not limited to this. Figure 46 As shown in (A) of FIG. 1 , the control unit 100b of the post-processing device 3 may also be provided on the side of the image forming device 2. Figure 46 As shown in FIG. 2 (B), the control unit 100 b of the post-processing device 3 may be integrally configured with the control unit 100 a of the image forming apparatus 2 .

[0241] In addition, if Figure 47 As shown in (A), the control unit 100b of the post-processing device 3 may be functionally divided into a control unit 100b1 (e.g., a drive unit system (motor, etc.)) and a control unit 100b2 (a detection unit system (sensor, etc.)), and only the control unit 100b2 of one post-processing device 3 may be provided on the side of the image forming device 2. Figure 47 As shown in FIG. 2 (B), the control unit 100 b 2 of the post-processing device 3 provided on the image forming device 2 side may be integrally configured with the control unit 100 a of the image forming device 2 .

[0242] [Embodiment of the Attachment and Removal Structure of the Second Liquid Storage Unit]

[0243] Next, the attachment and detachment structure of the second liquid storage unit included in the medium processing device according to the present invention will be described with reference to the drawings. Figure 26 This is a schematic diagram of a configuration in which a second reservoir tank 47 as an embodiment of a second reservoir portion is detachably attached to and from the post-processing device 3 .

[0244] The second liquid reservoir 47 is configured to be removably attached to and detached from the second liquid reservoir fixing portion 61, which serves as a liquid reservoir tray. The second liquid reservoir 47 includes a tank portion 472, which serves as a liquid reservoir and stores liquid for liquid delivery, i.e., liquid supplied to the first liquid reservoir 44; a cover portion 473; and the second liquid reservoir fixing portion 61. The cover portion 473 is removably attached to and detached from the tank portion 472 and is configured to supply liquid through a liquid outlet 471a provided in the tank portion 472. Furthermore, the cover portion 473 is configured to engage with the cover insertion hole 961 provided in the second liquid reservoir fixing portion 61.

[0245] When the liquid stored in the first liquid tank 44 is reduced due to the liquid supply, the liquid is supplied from the second liquid tank 47 to the first liquid tank 44. When the liquid stored in the second liquid tank 47 is replenished (supplied) due to the reduction of the liquid supply, the tank portion 472 is removed from the second liquid tank fixing portion 61, the cover portion 473 is removed from the tank portion 472, and the liquid is replenished into the tank portion 472 from the liquid discharge port 471a (see Figure 26 (A)).

[0246] Then, the liquid discharge port 471a is closed by the cover portion 473, and the tank portion 472 is placed on the second reservoir tank fixing portion 61, with the cover portion 473 being fitted into the cover insertion hole 961. Through this series of operations, the liquid is stored in the liquid storage tray 96 as a liquid storage tray included in the second reservoir tank fixing portion 61, and the liquid is supplied from the liquid storage tray 96 to the liquid supply path 45.

[0247] [Configuration of Liquid Supply Valve 471]

[0248] Next, refer to Figure 27 The structure of the liquid supply valve 471 included in the second liquid tank 47 will be described. Figure 27 (A) illustrates a state in which the tank portion 472 is detached from the second tank fixing portion 61 , that is, a state in which the liquid supply valve 471 is closed. Figure 27 (B) illustrates a state in which the tank portion 472 is mounted on the second tank fixing portion 61 and the liquid supply valve 471 is open.

[0249] like Figure 27 As shown, a liquid supply valve 471 is provided on the cover portion 473. The liquid supply valve 471 is urged from the inside of the box portion 472 toward the outside by the cover spring 4711. Therefore, when the box portion 472 is removed from the second liquid storage tank fixing portion 61, the liquid supply valve 471 is urged by the force Fc (refer to FIG. Figure 24 (A) arrow) and the liquid discharge port 471a is blocked.

[0250] When the tank portion 472 is mounted on the second reservoir tank fixing portion 61, the liquid supply valve 471 is pushed upward against the biasing force Fc of the cover spring 4711, thereby opening the liquid discharge port 471a. Liquid then flows from the opening (liquid discharge port 471a) of the cover portion 473 to the liquid storage tray 96 of the second reservoir tank fixing portion 61. A notch is provided at the front end of the cover portion 473 to maintain a constant liquid level in the second reservoir tank fixing portion 61.

[0251] [Locking Mechanism of the Second Reservoir 47 (Locking Claw Method)]

[0252] Next, a structure is described in which the second tank 47 is easy to operate and can be reliably attached and detached when removing the second tank 47 from the second tank fixing portion 61 and when fixing the second tank 47 to the second tank fixing portion 61. The second tank 47 according to this embodiment is easy to attach and detach the tank portion 472. Figure 26 As shown, a locking mechanism 95 is provided.

[0253] Figure 28 It is a diagram for explaining the structure of the locking mechanism 95 according to this embodiment. Figure 28FIG. 1(A) is a diagram showing a state where the tank portion 472 is removed from the second tank fixing portion 61 as viewed from above. Figure 28 FIG. 1B is a side view of the state where the tank portion 472 is removed from the second tank fixing portion 61 . Figure 28 (C) is a diagram showing a state where the tank portion 472 is mounted on the second tank fixing portion 61 as viewed from above. Figure 28 FIG. 1(D) is a side view of the state where the tank portion 472 is mounted on the second tank fixing portion 61. FIG.

[0254] As already explained, the liquid supply valve 471 is urged in the closing direction by the biasing force Fc of the cover spring 4711. When the tank portion 472 is mounted on the second reservoir tank fixing portion 61, the front end portion of the liquid supply valve 471 is in a state of pressing the liquid storage tray 96 of the second reservoir tank fixing portion 61. In other words, the reaction force Fc′ in the direction of pushing the second reservoir tank 47 upward generated by the biasing force Fc of the cover spring 4711 is in a state of acting on the second reservoir tank 47 (see FIG. 1 ). Figure 27 (B) Figure 28 (D)).

[0255] The locking mechanism 95 of the second reservoir 47 includes a locking claw 951 (engaging portion), a lock release lever 952 (engaging release member), and a locking spring 953 (urging member). The locking claw 951 and the lock release lever 952 are urged by the urging force Fs of the locking spring 953, and the urging force Fs acts in the direction in which the locking claw 951 pops out (see FIG. Figure 28 (B), (D)). Therefore, when the user slides the lock release lever 952, the user slides it in the direction opposite to the force Fs of the lock spring 953. When the user releases the force that slides the lock release lever 210, the locking claw 951 automatically slides in the direction of the force Fs of the lock spring 953.

[0256] like Figure 28 As shown in (A) to (D) of FIG. 1 , when the tank portion 472 is mounted on the second tank fixing portion 61, the locking claw 951 is inserted into the locking hole 971 provided on the main body side plate 72, which is a part of the device frame of the post-processing device 3, by the biasing force Fs of the locking spring 953 (see FIG. 1 ). Figure 28 (C), (D)). As a result, the locking claw 951 engages with the locking hole 971, and the position of the box portion 472 in the attachment and detachment direction (up and down direction) is restricted.

[0257] When the second reservoir tank 47 is pulled out, the lock release lever 952 is moved in the opposite direction to the biasing force Fs of the lock spring 953 (see Figure 28The user then slides the locking claw 951 away from the locking hole 971 (arrows (A) and (B)) to release the locking claw 951 from the locking hole 971. The locking claw 951 is then released. The user then removes the box 472 by pulling it out of the second tank fixing portion 61 while holding the upper portion of the box 472 to maintain the unlocked state.

[0258] [Shape Example of Locking Claw 951]

[0259] Next, refer to Figure 29 An example of the shape of the locking claw 951 will be described. Figure 29 (A) to (C) are as follows Figure 28 (C) and (D) show the relationship between the locking claw 951 and the locking hole 971 when the locking claw 951 is engaged with the locking hole 971 and the position of the box portion 472 in the attachment and detachment direction is restricted.

[0260] like Figure 29 As shown in (A), the overall shape of the locking claw 951 may also be relative to the sliding direction ( Figure 29 The shape of the second liquid reservoir 47 is horizontal (in the left-right direction). However, in this case, because the tank portion 472 itself is lightweight, as the amount of liquid W stored in the tank portion 472 decreases, the reaction force Fc' pushing the second liquid reservoir 47 upward increases. On the other hand, to improve user operability, the biasing force Fs of the lock spring 953 is preferably small (the minimum force required to maintain the engagement between the lock claw 951 and the lock hole 971). Therefore, for example, if the lock claw 951 is deformed by the reaction force Fc' pushing the second liquid reservoir 47 upward, the lock claw 951 may easily fall out of the lock hole 971.

[0261] In addition, if Figure 29 As shown in (B), the overall shape of the protruding portion of the locking claw 951 can also be set to an inclined state with an upward inclined surface relative to the main body. In this case, it is preferred that the inner surface of the locking hole 971 that contacts the upward inclined surface of the protruding portion of the locking claw 951 is also formed into a similar inclined surface. Then, by making the shapes of the locking claw 951 and the locking hole 971 Figure 29 As shown in FIG. 5B , even when the reaction force Fc′ in the upward pushing direction of the second reservoir tank 47 increases due to a decrease in the amount of liquid W stored in the tank portion 472 as described above, deformation of the locking claw 951 can be suppressed, and the inclined surface can be used to reduce the force for pulling the locking claw 951 out of the locking hole 971 to be smaller than the biasing force Fs of the locking spring 953. As a result, the inclined surface portion of the locking claw 951 is engaged in the locking hole 971, making it difficult for the locking claw 951 to come off.

[0262] In addition, if Figure 29As shown in (C), the front end of the protruding portion of the locking claw 951 may be shaped as an inclined portion that protrudes upward relative to the sliding direction of the main body. In this case, it is preferable that the inner surface of the locking hole 971 that contacts the upper surface of the protruding portion of the locking claw 951 also has the same shape. Then, by making the shapes of the locking claw 951 and the locking hole 971 Figure 29 As shown in (C), the inclined portion of the locking claw 951 is more firmly engaged with the locking hole 971, so that the locking claw 951 is more secure than the locking hole 971. Figure 29 (B) is a state in which it is more difficult to disengage from the locking hole 971.

[0263] [Guiding Mechanism of the Second Reservoir 47]

[0264] Next, the guide mechanism for regulating the position of the second tank 47 in the front-rear and left-right directions will be described. Figure 30 Shown is a schematic diagram of the guide mechanism of the second liquid storage tank 47. Figure 30 (A) is a diagram showing a state where the tank portion 472 is mounted on the second tank fixing portion 61 as viewed from above. Figure 30 (B) shows the direction of arrow A. Figure 30 The cross-sectional view taken along the one-dot chain line in (A) shows a state in which the tank portion 472 is mounted on the second tank fixing portion 61 . Figure 30 FIG. 1(C) shows the correlation between the height of the box portion 472 and the height of the guide portion 97 serving as the guide mechanism.

[0265] like Figure 30 As shown, the second tank fixing portion 61 is provided with a liquid storage tray 96 for storing liquid flowing out of the second tank 47, and a guide portion 97 for guiding and maintaining the installation and removal of the tank portion 472. When removing the tank portion 472 from the second tank fixing portion 61 (during installation and removal), the tank portion 472 is lifted and pulled out along the guide portion 97. Specifically, when the tank portion 472 is removed from the second tank fixing portion 61 to replenish liquid, the left-right position of the tank portion 472 when lifted along the guide portion 97 is restricted. In other words, the guide portion 97 restricts the position of the tank portion 472 in the installation and removal direction. This configuration prevents the tank portion 472 from swaying in a direction other than the installation and removal direction, such as the left-right direction. By restricting the installation and removal direction of the tank portion 472, the user is prevented from swaying when removing the tank portion 472, making it easier for the user to pull out the tank portion 472.

[0266] If the height of the guide portion 97, which serves as the wall surface, is too low relative to the height of the tank portion 472, when the tank portion 472 is mounted on the second tank fixing portion 61, the tank portion 472 may not stand upright relative to the second tank fixing portion 61, but may fall over and become unstable. If the tank portion 472 falls over, there is a risk of the locking claw 951 falling off.

[0267] Therefore, if Figure 30 As shown in (C), from the perspective of ease of loading and unloading and the stability of the box portion 472, the lower limit of the height dimension of the guide portion 97 (guide height b) is preferably 1 / 2 (approximately half) or greater of the height dimension of the box portion 472 (box height a). In addition, from the perspective of operability, the upper limit of the guide height b can be set below the locking mechanism 95 mounted on the upper surface of the box portion 472.

[0268] Alternatively, the entire or a portion of the tank portion 472 may be made transparent or translucent so that the amount of liquid inside the tank portion 472 can be visually confirmed. In this case, if the height of the guide portion 97 is increased, the side of the tank portion 472 cannot be visually confirmed when the tank portion 472 is set on the second tank fixing portion 61, making it difficult to confirm the amount of liquid. Figure 30 As shown in (C), a confirmation window 972 as a window-like portion (visual confirmation portion) can also be provided on the guide portion 97 to allow the amount of liquid inside the box portion 472 to be visually confirmed from the outside. Thus, the contents of the box portion 472 can be directly visually confirmed through the confirmation window 972.

[0269] [First Modification of the Locking Mechanism 95]

[0270] Next, a modification of the lock mechanism 95 according to this embodiment will be described. Figure 31 1 and 2 (A) show the locked state of the locking mechanism 95a according to this example as viewed from above. Figure 31 (B) shows the direction of arrow A. Figure 31 1 is a cross-sectional view of the locking mechanism 95a according to the present embodiment in a locked state when taken along the dashed line in FIG. Figure 31 FIG. 1(C) shows a view of the unlocked state of the lock mechanism 95a according to this example as viewed from above. Figure 31 (D) shows the direction of arrow A. Figure 31 1 is a cross-sectional view of the lock mechanism 95a according to the present embodiment in the unlocked state when taken along the one-dot chain line in FIG.

[0271] Figure 31The illustrated locking mechanism 95a includes a locking plate 951a (engaging portion) in place of the locking claw 951. The locking plate 951a is slidably disposed in the left-right direction on the top plate portion of the liquid storage tray 96, which is part of the second tank fixing portion 61. The locking plate 951a is biased by an elastic member 951b so as to protrude in a direction that narrows the diametrical gap of the tank insertion hole 9111 provided in the top plate portion of the liquid storage tray 96, which is part of the second tank fixing portion 61. Therefore, when a force is applied to the locking plate 951a in a direction that overcomes the biasing force, the elastic member 951b contracts, causing the locking plate 951a to retract in a direction that widens the gap in the tank insertion hole 9111.

[0272] On the side of the box portion 472 where the cover portion 473a is mounted, a plate engaging portion 4731a (engaged portion) is provided that engages with the locking plate 951a and the top plate portion of the liquid storage tray 96. The plate engaging portion 4731a is a convex or concave portion. The locking plate 951a is inserted into the plate engaging portion 4731a and moves in the direction of insertion into the entire box portion 472, thereby restricting the position of the cover portion 473a in the installation and removal direction. This restricts the installation and removal direction of the box portion 472.

[0273] When the tank 472 is inserted into the second tank fixing portion 61, the locking plate 951a is pushed by the plate engaging portion 4731a of the cover portion 473a and moves in the retracting direction. When the tank 472 is inserted into the rear end, the locking plate 951a passes over the convex shape of the plate engaging portion 4731a, and the tank 472 is locked.

[0274] The lock plate 951 a is provided with a lock release lever 952 that is linked thereto. By operating the lock release lever 952 to retract it, the box portion 472 can be pulled out.

[0275] [Second Modification of the Locking Mechanism]

[0276] Next, other modified examples of the lock mechanism 95 according to this embodiment will be described. Figure 32 1 is a side view of the locking mechanism 95b of this embodiment in a locked state. The locking mechanism 95b is a so-called "snap-fit" structure.

[0277] A cover convex portion 4731b (convex portion) is provided on the side surface of the cover portion 473, which is attached to the protruding portion of the tank portion 472. Furthermore, a tray convex portion 962 (convex portion) is provided on the outer periphery of the hole in the second reservoir tank fixing portion 61 where the cover portion 473 fits into the reservoir tray 96. Either or both of the cover portion 473 and the reservoir tray 96 are made of an elastomer (such as a resin).

[0278] That is, by forming one or both of the two locking-shaped portions of the cover protrusion 4731b and the two protruding-shaped portions of the tray protrusion 962 into an elastic body, when the box portion 472 is fitted into the liquid storage tray 96 and pressed in to deform, the cover protrusion 4731b reaches a position that exceeds the tray protrusion 962. By the cover protrusion 4731b exceeding the tray protrusion 962 and fitting into the opening, the position of the box portion 472 in the attachment and detachment direction is restricted.

[0279] In addition, when the box part 472b is detached from the liquid storage tray 96, no unlocking action is required. By pulling the box part 472b upward, the cover protrusion 4731b exceeds the tray protrusion 962 due to elasticity, and it can be directly inserted and removed.

[0280] [Third Modification of Locking Mechanism]

[0281] Next, another modified example of the lock mechanism 95 according to this embodiment will be described. Figure 33 The figure shows the operation of the locking mechanism 95c in this embodiment. Figure 33 (A) is the view from above. Figure 33 (B) is a side view. The locking mechanism 95c is a so-called rotational locking mechanism, which secures the tank portion 472 to the liquid storage tray 96 by engaging a tank protrusion 4721c (a protrusion-shaped engaging portion) provided on a portion of the outer circumference of the tank portion 472 with a locking shape 961c (a protrusion-shaped engaged portion) provided on the liquid storage tray 96.

[0282] like Figure 33 As shown, the tank protrusions 4721c constituting the locking mechanism 95c are provided at multiple locations (at least at two locations) on the outer circumferential surface of the box portion 472. In addition, a locking shape portion 961c is provided on the outer surface of the top surface of the liquid storage tray 96 in a protruding shape so that the tank protrusions 4721c can be inserted from the rotation direction of the box portion 472. When the cover portion 473 is mounted on the box portion 472, the box portion 472 is inserted to a position where it is fixed to the second liquid storage tank fixing portion 61, and the box portion 472 is rotated in the circumferential direction ( Figure 33 (A) is rotated clockwise to insert the tank protrusion 4721c into the locking shape portion 961c.

[0283] Thus, the movement of the box portion 472 in the attachment and detachment directions is restricted. Figure 33 By rotating the tank in the counterclockwise direction in (A), the engagement between the tank protrusion 4721c and the locking shape portion 961c is released, thereby releasing the locked state.

[0284] [First Modification of the Second Reservoir Fixing Portion 61]

[0285] Next, a first modification of the second tank fixing portion 61 will be described. Figure 34 As shown, a filter 6112 is provided on the liquid supply port 6111 of the second tank fixing portion 61. Liquid accumulated in the second tank fixing portion 61 is supplied to the liquid applying member 501 via the liquid supply port 6111 of the second tank fixing portion 61 through the liquid supply path 45. If contaminants enter the liquid supply path 45, the liquid supply path 45 may become clogged, potentially leading to failures such as failure to supply liquid. Therefore, a filter 6112 is provided upstream (at the inlet) of the liquid supply port 6111 of the second tank fixing portion 61 to prevent contaminants from flowing into the liquid supply path 45.

[0286] [Second Modification of the Second Reservoir Fixing Portion 61]

[0287] Next, a second modification of the second tank fixing portion 61 will be described. Figure 35 As shown in the example, a tray liquid level detection sensor 6113 is provided for detecting the liquid level of the liquid storage tray 96 of the second tank fixing portion 61, thereby monitoring the presence of liquid supplied from the second tank 47. If it is determined that the tank portion 472 is empty and liquid is not being supplied to the second tank fixing portion 61, a display urging liquid replenishment may be displayed on the operation panel 110.

[0288] Figure 36 The figure shows a situation where parallel binding is performed at multiple locations in the width direction of the paper bundle Pb in a "parallel binding posture" (first binding posture) in which the length direction (i.e., the long side) of the front end portions of the upper and lower pressing teeth 32a, 32b, and the liquid applying component 501 are aligned with the main scanning direction.

[0289] First, before the paper P is conveyed to the inner tray 22, the end binding processing unit 25 is operated from the Figure 36 The standby position HP of (A) moves to Figure 36 The first liquid applying position B1 shown in (B) is adjusted so that the liquid applying section 31 is located at the first liquid applying position B1.

[0290] Then, when the position alignment of the paper P supported by the inner tray 22 in the main scanning direction and the conveying direction is completed, the liquid applying unit 31 located at the first liquid applying position B1 applies liquid to the paper P. When the liquid application in the first liquid applying position B1 is completed, as shown in FIG. Figure 36 As shown in FIG. 5 (C), the liquid applying section 31 moves to the second liquid applying position B2. After the movement is completed, liquid is applied to the paper P at the second liquid applying position B2.

[0291] Then, repeat the above Figure 36 (B) and Figure 36 The liquid applying process shown in (C) is performed until the number of sheets P placed on the inner tray 22 reaches a predetermined number (the number of sheets constituting the sheet bundle Pb).

[0292] Then, when the number of sheets P placed on the inner tray 22 reaches a predetermined number and the liquid application process is completed, as shown in FIG. Figure 36 As shown in (D), the end binding processing unit 25 is moved in the main scanning direction so that the pressing unit 32 is located at the second binding position B2. Then, after the movement is completed, the pressing unit 32 performs pressing and binding on the paper bundle Pb at the second binding position B2. After the pressing and binding at the second binding position B2 is completed, as shown in FIG. Figure 36 As shown in FIG. 8 (E), the end stapling processing unit 25 is moved in the main scanning direction so that the pressing unit 32 is located at the first stapling position B1. After the movement is completed, the pressing unit 32 performs pressure stapling on the paper bundle Pb at the first stapling position B1.

[0293] Then, when the pressure binding process at the first binding position B1 is completed, the end binding processing section 25 is moved to the Figure 36 The stapling process is completed by moving the stapling machine to the standby position HP of (A).

[0294] In the above embodiment, an example is shown in which one liquid applying portion 31 and one crimping portion 32 are provided, but the number of liquid applying portions 31 and crimping portions 32 is not limited thereto. As another example, two liquid applying portions 31L, 31R and two crimping portions 32L, 32R may be provided.

[0295] According to the embodiment described above, liquid supply control is implemented based on the status of the liquid reservoir in the post-processing device 3, thereby properly maintaining the liquid in the liquid reservoir. Specifically, the liquid supply to the liquid reservoir is controlled based on the operating status of the post-processing device 3. As a result, the stable supply of liquid to the liquid application unit improves binding quality. Furthermore, since the time required for the crimping binding operation can be shortened, user convenience can be improved by optimizing user waiting time.

[0296] [Second embodiment of post-processing device 3]

[0297] Next, refer to Figures 37 to 45 , a post-processing device 3A according to the second embodiment will be described. Components common to the post-processing device 3 according to the first embodiment are denoted by the same reference numerals, and detailed descriptions thereof will be omitted.

[0298] Unlike the end stapling unit 25 of the post-processing apparatus 3 according to the first embodiment, which includes both the liquid applying unit 31 and the crimping unit 32, the end stapling unit 251 of the post-processing apparatus 3 according to the second embodiment has only the crimping unit 32', and the liquid applying unit 131 is positioned upstream of the conveyance path. This allows a predetermined number of sheets P to be pre-stacked after liquid application and then conveyed to the crimping unit 32' of the end stapling unit 251, positioned downstream. This improves the productivity of the stapling process in the crimping unit 32'.

[0299] The direction in which the conveying roller pairs 10, 11, and 14 convey the paper P is opposite to the "conveying direction" defined above and is therefore defined as the "reverse conveying direction." Furthermore, the reverse conveying direction and the direction perpendicular to the thickness of the paper P are defined as the "main scanning direction (the width direction of the paper P)." Furthermore, the position where liquid is applied to the paper P or paper bundle Pb by the liquid applying unit 131 (the liquid applying position) corresponds to the predetermined binding position at which the crimping unit 32' crimps the paper bundle Pb. Therefore, the following description will denote the liquid applying position and the binding position with the same reference numeral (B1).

[0300] Figure 37 FIG. 1 is a diagram showing the internal structure of the post-processing device 3A according to the second embodiment. Figure 38 As shown, the end stapling unit 251 includes only the pressing portion 32'. The pressing portion 32' and the needle stapling unit 156 are located downstream of the inner tray 22 in the conveyance direction. Furthermore, the pressing portion 32' and the needle stapling unit 156 are configured to be movable in the main scanning direction while facing the downstream end of the paper bundle Pb placed on the inner tray 22 in the conveyance direction.

[0301] Furthermore, the pressing section 32' and the needle stapling processing section 156 are configured to rotate in forward and reverse directions about a pressing section rotation axis 340 and a needle stapling unit rotation axis 84, which extend in the thickness direction of the paper bundle Pb placed on the inner tray 22. That is, the pressing section 32' and the needle stapling processing section 156 can stapling the paper bundle Pb placed on the inner tray 22 at any position in the main scanning direction at any angle, such as corner stapling, parallel stapling at one point, or parallel stapling at two points.

[0302] The crimping section 32' uses the concave-convex upper and lower crimping teeth 32a and 32b to pressurize and deform the paper bundle Pb, thereby binding the paper bundle Pb (hereinafter referred to as "crimping and binding"). Meanwhile, the needle binding processing section 156 can needle-bind the paper bundle Pb by passing a binding needle through the binding position of the paper bundle Pb placed on the inner tray 22.

[0303] Figure 38Shown is a schematic diagram of the inner tray 22 viewed from the thickness direction of the paper bundle Pb. Figure 39 FIG. 3 is a schematic diagram of the crimping portion 32' as viewed from the downstream side in the conveying direction. Figure 38 As shown, the pressing section 32' and the stapling processing section 156 are arranged on the downstream side of the inner tray 22 in the conveyance direction. The pressing section 32' is configured to be movable in the main scanning direction along the surface of the paper bundle Pb placed on the inner tray 22. The pressing section 32' is configured to be rotatable in the forward and reverse directions around a pressing section rotation axis 340 extending in the thickness direction of the paper bundle Pb placed on the inner tray 22.

[0304] In addition, the needle binding processing unit 156 is also configured to be movable in the main scanning direction of the paper bundle Pb. Then, the needle binding processing unit 156 is configured to be rotatable in the forward and reverse directions around the needle binding unit rotation axis 84 extending in the thickness direction of the paper bundle Pb. In addition, the other configurations of the needle binding processing unit 156 are similar to those of the needle binding processing unit 155 of the post-processing device 3 according to the first embodiment (see Figure 9 ) are the same, so detailed description is omitted.

[0305] like Figure 39 As shown, the crimping portion 32' is provided with a guide rail 337 extending along the main scanning direction on the downstream side of the inner tray 22 in the conveying direction. The crimping portion 32' has a crimping portion moving motor 238 as a driving source. In addition, the base component 48 supporting the crimping frame 32c has a fastening portion 48b with a timing belt 240c at its bottom. As a result, the driving force of the crimping portion moving motor 238 is transmitted to the base component 48 via the drive transmission mechanism 240 having pulleys 240a, 240b, a timing belt 240c, and a fastening portion 48b, and the crimping portion 32' moves in the main scanning direction along the surface of the paper bundle Pb placed on the inner tray 22 (in other words, the guide rail 337). Furthermore, the crimping frame 32c, which is a component of the crimping portion 32', has a crimping portion rotating shaft 340 having a drive transmission gear 340a fixed to its bottom surface.

[0306] In addition, the crimping portion rotating shaft 340 and the drive transmission gear 340a are held on the base member 48 provided with the crimping frame 32c so as to be rotatable in both forward and reverse directions. The drive transmission gear 340a meshes with the output gear 239a of the crimping portion rotating motor 239. Then, by transmitting the driving force of the crimping portion rotating motor 239 via the output gear 239a and the drive transmission gear 340a to the crimping portion rotating shaft 340, the crimping portion 32' rotates in both forward and reverse directions on the base member 48 about the crimping portion rotating shaft 340, which extends in the thickness direction of the paper P loaded on the inner tray 22. The guide rail 337, the crimping portion moving motor 238, the crimping portion rotating motor 239, the crimping portion rotating shaft 340, and the drive transmission mechanism 240 constitute an example of a drive mechanism for the crimping portion 32'.

[0307] The crimping portion 32' is configured to be capable of Figure 38 The standby position HP2 shown in (A) and Figure 38 (B) and Figure 38 The standby position HP2 is a position that is offset from the paper bundle Pb placed on the inner tray 22 toward one end in the main scanning direction. The first stapling position B1 is a position on the paper bundle Pb placed on the inner tray 22. However, the specific position of the first stapling position B1 is not limited to Figure 38 For example, it may be any position in the main scanning direction at the downstream end portion of the paper P in the conveyance direction, and the number may be multiple.

[0308] In addition, the posture of the crimping portion 32' is Figure 38 (B) shows the parallel binding posture and Figure 38 The crimping portion 32' is configured to be rotatable in the forward and reverse directions about the crimping portion rotation axis 340. Here, the so-called parallel binding posture is a posture of the crimping portion 32' in which the length direction of the upper crimping teeth 32a and the lower crimping teeth 32b (in other words, the rectangular crimping binding mark) is directed toward the main scanning direction. In addition, the so-called oblique binding posture is a posture of the crimping portion 32' in which the length direction of the upper crimping teeth 32a and the lower crimping teeth 32b (in other words, the rectangular crimping binding mark) is inclined toward the main scanning direction.

[0309] In addition, the rotation angle in the oblique binding posture (the angle of the upper pressing teeth 32a and the lower pressing teeth 32b relative to the main scanning direction) is not limited to Figure 38 In the example of (C), the upper pressing teeth 32 a and the lower pressing teeth 32 b may be at any angle as long as they face the paper bundle Pb placed on the inner tray 22 .

[0310] The post-processing device 3A includes a liquid applying unit 131 and a punching unit 132 (processing unit). The liquid applying unit 131 and the punching unit 132 are located upstream of the inner tray 22 in the reverse conveyance direction. Furthermore, the liquid applying unit 131 and the punching unit 132 are staggered in the reverse conveyance direction, so that they can simultaneously face a sheet of paper P conveyed by the conveyance roller pairs 10 to 19.

[0311] The liquid applying portion 131 and the punching unit 132 of this embodiment are arranged between the conveying roller pair 10 and 11. However, the arrangement of the liquid applying portion 131 is not limited to Figure 37 For example, Figure 45 As shown in FIG. 1 , when an inserter 6 is disposed between the image forming apparatus 2 and the post-processing apparatus 3A, the liquid applying unit 131 may be provided in the inserter 6 located upstream of the post-processing apparatus 3A. The inserter 6 may be, for example, a device that can feed pre-printed media, such as a cover, insert, or separator, to the post-processing apparatus 3A along with the paper P fed from the image forming apparatus 2, without passing through the image forming apparatus 2.

[0312] In addition, if Figure 40 As shown in (A), the transport roller pair 11 is positioned so as not to overlap in the main scanning direction with the first liquid application position B1 of the paper P, where liquid has been applied by the liquid application head 146 of the liquid application unit 131. This is to prevent the amount of liquid at the first liquid application position B1 from decreasing due to the pressure applied by multiple roller pairs during transport of the paper P. As a result, when the paper P reaches the pressure contact portion 32', located downstream of the liquid application unit 131 in the reverse transport direction, the amount of liquid at the first liquid application position B1 is sufficient to maintain the binding strength. This prevents a decrease in the binding strength of the paper bundle Pb due to a decrease in the amount of liquid at the first liquid application position B1 (equivalent to the first binding position B1) during transport.

[0313] Furthermore, by arranging the multiple roller pairs constituting the conveying roller pair 11 at positions that do not overlap with the first liquid application position B1 of the paper P in the main scanning direction, it is possible to prevent liquid from adhering to the multiple roller pairs and deteriorating the conveyance performance of the paper P, or preventing conveyance jams caused by deteriorating conveyance performance.

[0314] In addition, only the transport roller pair 11 has been described above, but the plurality of roller pairs constituting the transport roller pairs 14 and 15 are also preferably arranged at positions that do not overlap with the first liquid application position B1 on the paper P in the main scanning direction.

[0315] The liquid applying unit 131 applies liquid to the paper P conveyed by the transport roller pair 10, 11 (hereinafter referred to as "liquid applying"). The punching unit 132 punches holes through the paper P conveyed by the transport roller pair 10, 11 in the thickness direction. The processing unit provided near the liquid applying unit 131 is not limited to the punching unit 132; it may also be a tilt correction unit that corrects the tilt (skew) of the paper P conveyed by the transport roller pair 10, 11.

[0316] Figure 40 FIG. 1 is a diagram showing the liquid applying section 131 according to the second embodiment as viewed from the thickness direction of the paper P. FIG. Figure 41 Shown is Figure 40 Sectional view of XXV-XXV. Figure 42 Shown is Figure 40 The sectional view in XXVI-XXVI. Figures 40 to 42 As shown, the liquid applying section 131 includes a pair of guide shafts 133 a and 133 b , a pair of pulleys 134 a and 134 b , seamless endless belts 135 and 136 , a liquid applying section moving motor 137 , a standby position sensor 138 , and a liquid applying unit 140 .

[0317] The pair of guide shafts 133a and 133b are spaced apart in the reverse conveying direction and extend in the main scanning direction. Furthermore, the pair of guide shafts 133a and 133b are supported by a pair of side plates 4a and 4b of the post-processing device 3A. The pair of guide shafts 133a and 133b then support the liquid application assembly 140 so that it can move in the main scanning direction.

[0318] The pair of pulleys 134a and 134b are positioned between the pair of guide shafts 133a and 133b in the reverse conveying direction. Furthermore, the pair of pulleys 134a and 134b are spaced apart in the main scanning direction. Furthermore, the pair of pulleys 134a and 134b are supported on the frame of the post-processing device 3A so as to be rotatable in forward and reverse directions about a rotation axis extending in the thickness direction of the paper P.

[0319] A seamless endless belt 135 is mounted on a pair of pulleys 134a and 134b. Furthermore, the seamless endless belt 135 is connected to the liquid applying assembly 140 via a connecting portion 135a. A seamless endless belt 136 is mounted on pulleys 134a and a drive pulley 137a fixed to the output shaft of a liquid applying unit moving motor 137. The liquid applying unit moving motor 137 generates a driving force for moving the liquid applying assembly 140 in the main scanning direction.

[0320] The rotation of the liquid application unit movement motor 137 causes the seamless endless belt 136 to rotate between the pulley 134a and the drive pulley 137a, rotating the pulley 134a. Furthermore, the rotation of the pulley 134a causes the seamless endless belt 135 to rotate between the pair of pulleys 134a and 134b. This causes the liquid application assembly 140 to move in one direction in the main scanning direction along the pair of guide shafts 133a and 133b. Furthermore, by switching the rotation direction of the liquid application unit movement motor 137, the liquid application assembly 140 can be moved in the main scanning direction in a direction opposite to the one direction.

[0321] The standby position sensor 138 detects that the liquid applying unit 140 has reached the standby position HP1 in the main scanning direction (see Figure 40 ), and outputs a standby position signal indicating the detection result to the control unit 100b described later (refer to Figure 43 Standby position sensor 138 is, for example, an optical sensor comprising a light-emitting portion and a light-receiving portion. Liquid dispensing assembly 140 in the standby position blocks the optical path between the light-emitting portion and the light-receiving portion. Standby position sensor 138 then outputs a standby position signal when light output from the light-emitting portion is not received by the light-receiving portion. However, the specific configuration of standby position sensor 138 is not limited to the above example.

[0322] like Figure 41 As shown, the conveyance path within the post-processing device 3A is defined by the upper guide plate 5a and the lower guide plate 5b, which are spaced apart in the thickness direction of the paper P. The liquid applying assembly 140 is positioned facing the opening provided in the upper guide plate 5a. Specifically, the liquid applying assembly 140 is positioned facing the conveyance path (i.e., a position where it can face the paper P) through the opening of the upper guide plate 5a.

[0323] like Figures 40 to 42 As shown, the liquid applying assembly 140 includes a base member 141, a rotating bracket 142, a liquid storage tank 143, a liquid applying nozzle moving mechanism 144, a holding member 145, a liquid applying head 146, columnar members 147a, 147b, a pressing plate 148, coil springs 149a, 149b, a applying nozzle rotating motor 150, and a applying nozzle moving motor 151 (see Figure 43 ), standby angle sensor 152 (refer to Figure 43 ).

[0324] The base member 141 is supported by a pair of guide shafts 133a and 133b so as to be slidable in the main scanning direction. Furthermore, the base member 141 is connected to the seamless endless belt 135 via a connecting portion 135a. Furthermore, the base member 141 supports the components 142 to 152 of the liquid applying assembly 140.

[0325] The rotating bracket 142 is mounted on the bottom surface of the base member 141 and is rotatable in forward and reverse directions about a rotation axis extending in the thickness direction of the paper P. Furthermore, the rotating bracket 142 rotates in forward and reverse directions relative to the base member 141 by the driving force transmitted from the head rotation motor 150. Furthermore, the rotating bracket 142 holds the liquid tank 143, the liquid application head moving unit 144, the holding member 145, the liquid application head 146, the columnar members 147a and 147b, the pressing plate 148, and the coil springs 149a and 149b.

[0326] Standby angle sensor 152 (see Figure 43 ) detects when the rotating bracket 142 reaches the standby angle and outputs a standby angle signal indicating the detection result to the control unit 100b. The standby angle refers to the angle used for parallel binding, for example. The standby angle sensor 152 is, for example, an optical sensor having a light-emitting portion and a light-receiving portion. The rotating bracket 142 at the standby angle then blocks the light path between the light-emitting portion and the light-receiving portion. The standby angle sensor 152 then outputs a standby angle signal in response to the light output from the light-emitting portion not being received by the light-receiving portion. However, the specific configuration of the standby angle sensor 152 is not limited to the above example.

[0327] besides, Figure 40 The rotating bracket 142 shown in (A) shows a state in which the crimping portion 32' on the downstream side of the liquid applying portion 131 performs parallel binding. Figure 40 The rotating bracket 142 shown in FIG. 1 (B) shows a state in which the pressure-bonding portion 32 ′ on the downstream side of the liquid applying portion 131 performs diagonal binding (corner binding).

[0328] The liquid tank 143 stores liquid for application to the paper P. The liquid application nozzle moving unit 144 is installed in the liquid tank 143 so as to be movable (e.g., raised and lowered) in the thickness direction of the paper P. In addition, the liquid application nozzle moving mechanism 144 moves in the thickness direction of the paper P relative to the liquid tank 143 by the driving force transmitted from the nozzle moving motor 151. The retaining member 145 is installed at the lower end of the liquid application nozzle moving unit 144. The liquid application head 146 protrudes from the retaining member 145 toward the conveying path (below in this embodiment). In addition, the liquid stored in the liquid tank 143 is supplied to the liquid application head 146. Furthermore, the liquid application head 146 is made of a material with a high liquid absorption rate (e.g., sponge, fiber).

[0329] The columnar members 147a and 147b protrude downward from the holding member 145 around the liquid dispensing head 146. Furthermore, the columnar members 147a and 147b are configured to be movable relative to the holding member 145 in the thickness direction. Furthermore, the columnar members 147a and 147b hold the push plate 148 at their lower ends. A through-hole 148a is formed in the push plate 148 at a position facing the liquid dispensing head 146. Coil springs 149a and 149b are externally inserted into the columnar members 147a and 147b between the holding member 145 and the push plate 148. The coil springs 149a and 149b then bias the columnar members 147a and 147b and the push plate 148 away from the holding member 145.

[0330] like Figure 41 (A) and Figure 42 As shown in (A), before the paper P is transported to a position facing the opening of the upper guide plate 5a, the pressing plate 148 is located at or above the opening. Next, when the first liquid application position B1 of the paper P transported by the transport roller pairs 10 and 11 stops at a position facing the opening, the liquid application head movement motor 151 is rotated in the first direction. As a result, the liquid application head movement unit 144, the retaining member 145, the liquid application head 146, the columnar members 147a and 147b, the pressing plate 148, and the coil springs 149a and 149b are lowered as a whole, and the pressing plate 148 contacts the paper P. The first liquid application position B1 is a predetermined position (i.e., the first binding position B1) for pressure-bonding by the end stapling processing unit 251 (i.e., the pressure-bonding portion 32').

[0331] After the push plate 148 contacts the paper P, the liquid applying head moving motor 151 is rotated in the first direction, thereby compressing the coil springs 149a and 149b, and the liquid applying head moving unit 144, the holding member 145, the liquid applying head 146, and the columnar members 147a and 147b are further lowered. Figure 41 (B) and Figure 42 As shown in FIG. 1B , the lower surface of the liquid applying head 146 contacts the paper P through the through-hole 148 a . As a result, the liquid contained in the liquid applying head 146 is applied to the paper P.

[0332] Furthermore, if Figure 41 (C) and Figure 42 As shown in (C), by further rotating the liquid dispensing head moving motor 151 in the first direction, the liquid dispensing head 146 can be pressed more strongly against the paper P. This increases the amount of liquid applied to the paper P. In other words, the liquid dispensing unit 131 can adjust the amount of liquid applied by varying the pressing force of the liquid dispensing head 146 against the paper P.

[0333] On the other hand, by rotating the liquid dispensing head moving motor 151 in a second direction opposite to the first direction, the liquid dispensing head moving mechanism 144, the holding member 145, the liquid dispensing head 146, the columnar members 147a, 147b, the pressing plate 148 and the coil springs 149a, 149b are integrally raised. Figure 41 (A) and Figure 42 As shown in FIG. 1A , the liquid applying head 146 and the pressing plate 148 are separated from the paper P. That is, the liquid applying section 131 includes the liquid applying head 146 that is separable from the paper P.

[0334] Figure 43 FIG. 1 is a hardware configuration diagram of a control module for controlling the operation of the post-processing device 3A according to the second embodiment. Figure 43 As shown, the post-processing device 3A includes a CPU (Central Processing Unit) 101 , a RAM (Random Access Memory) 102 , a ROM (Read Only Memory) 103 , an HDD (Hard Disk Drive) 104 , and an I / F 105 connected via a common bus 109 .

[0335] The CPU 101 is a computing unit that controls the overall operation of the post-processing device 3A. The RAM 102 is a volatile storage medium capable of high-speed data read and write operations and serves as a work area for the CPU 101 when processing information. The ROM 103 is a read-only non-volatile storage medium that stores programs such as firmware. The HDD 104 is a non-volatile storage medium with a large data storage capacity capable of reading and writing information and stores an operating system (OS), various control programs, and application programs.

[0336] The post-processing device 3A uses the computing capabilities of the CPU 101 to process control programs stored in the ROM 103 and information processing programs (applications) loaded from storage media such as the HDD 104 into the RAM 102. This processing forms a software control unit comprising the various functional modules of the post-processing device 3A. The combination of this software control unit and the hardware resources installed in the post-processing device 3A forms the functional blocks that implement the functions of the post-processing device 3A. Specifically, the CPU 101, RAM 102, ROM 103, HDD 104, and I / F 105 constitute the control unit 100b (control unit) that controls the operation of the post-processing device 3A.

[0337] I / F105 is an interface that connects the conveying roller pair 10, 11, 14, 15, the switching component 20, the side guards 24L, 24R, the crimping part moving motor 238, the crimping part rotating motor 239, the contact / separation motor 32d, the liquid applying part moving motor 137, the applying nozzle rotating motor 150, the applying nozzle moving motor 151, the standby position sensor 138, the standby angle sensor 152, the punching and drilling unit 132 and the operation panel 110 to the common bus 109.

[0338] The control unit 100b controls the operations of the transport roller pairs 10, 11, 14, and 15, the switching member 20, the side fences 24L and 24R, the pressing unit moving motor 238, the pressing unit rotating motor 239, the contact / separation motor 32d, the liquid applying unit moving motor 137, the applying head rotating motor 150, the applying head moving motor 151, and the punching unit 132 via the I / F 105. Furthermore, the control unit 100b obtains detection results from the standby position sensor 138 and the standby angle sensor 152 via the I / F 105.

[0339] In addition, Figure 43 1 and 2 mainly illustrate the components of the end stapling unit 251 (pressing unit 32 ′) and the liquid applying unit 131 that perform the end stapling process, but the components of the saddle stitching unit 28 that performs the saddle stitching process are also controlled by the control unit 100 b.

[0340] like Figure 45 As shown, the image forming apparatus 2 includes an operation panel 110. The operation panel 110 includes an operation unit for accepting input operations from the user and a display (notification unit) for notifying the user of information. The operation unit includes, for example, hard keys or a touch panel superimposed on the display. The operation panel 110 then obtains information from the user via the operation unit and provides information to the user via the display. Alternatively, the post-processing apparatus 3A may also include an operation panel 110 similar to the above.

[0341] Figure 44 FIG. 1 is a flowchart of the post-processing of the post-processing device 3A according to the second embodiment. Specifically, Figure 44 It is executed Figure 38 The flowchart shown is for one-position binding processing.

[0342] The control unit 100b executes, for example, the post-processing execution instruction (hereinafter referred to as “post-processing instruction”) acquired from the image forming apparatus 2. Figure 44The post-processing instructions include, for example, the number of sheets of paper P constituting the paper bundle Pb (hereinafter referred to as "prescribed number of sheets Np"), the number of copies of the paper bundle Pb to be bound (hereinafter referred to as "required number of copies Mp"), the first binding position B1 (equivalent to the first liquid imparting position B1), the angle of the first binding position B1 (equivalent to the angle of the first liquid imparting position B1), the type of binding process (parallel binding process, oblique binding process), and the process performed in parallel with the liquid imparting process (perforation in this embodiment). In addition, at the start of the post-processing, the liquid imparting component 140 is located at the standby position HP1 (refer to Figure 40 ), the rotating bracket 142 is maintained at the standby angle (equivalent to the "parallel binding posture").

[0343] First, the control unit 100b drives the liquid applying unit moving motor 137 to move the liquid applying assembly 140 (equivalent to the liquid applying unit) in the main scanning direction, thereby moving the liquid applying head 146 from the standby position HP1 to a position where it can be aligned with the first liquid applying position B1 (see FIG. Figure 40 (B), equivalent to Figure 38 In addition, when the type of binding process indicated by the post-processing instruction is "oblique binding process", the control unit 100b drives the liquid applying nozzle moving motor 150 to rotate the rotating bracket 142, thereby rotating the liquid applying nozzle 146 from the standby angle to the liquid applying angle corresponding to the "oblique binding posture" (S801). The situation in which the liquid applying head 146 reaches the position where it can face the first liquid applying position B1 and the liquid applying angle can be grasped by the pulse signals output from the rotary encoders of the liquid applying unit moving motor 137 and the liquid applying nozzle moving motor 150. In addition, when the type of binding process indicated by the post-processing instruction is "parallel binding process", the control unit 100b omits the action of rotating the above-mentioned rotating bracket 142. That is, the liquid applying component 140 moves along the main scanning direction while keeping the rotating bracket 142 at the standby angle.

[0344] In addition, the control unit 100b drives the crimping unit to move the motor 238, as shown in FIG. Figure 38 (A) Figure 38As shown in (B), the crimping section 32' is moved from the standby position HP2 to a position where it can face the first binding position B1 (S801). In addition, when the type of binding process indicated by the post-processing instruction is "oblique binding process", the control section 100b drives the crimping section rotating motor 239 to rotate the crimping section 32' from the standby angle to the crimping binding angle corresponding to the "oblique binding posture" (S801). The position where the crimping section 32' can face the first binding position B1 and the crimping binding angle can be grasped by the pulse signals output from the rotary encoders of the crimping section moving motor 238 and the crimping section rotating motor 239. In addition, when the type of binding process indicated by the post-processing instruction is "parallel binding process", the control section 100b omits the action of rotating the crimping section 32'. That is, the crimping section 32' moves along the main scanning direction while maintaining the standby angle.

[0345] Next, the control unit 100b starts conveying the paper P, on which an image has been formed by the image forming apparatus 2, by driving the conveying roller pair 10 and 11 (S802). The control unit 100b then determines whether the first liquid application position B1 of the paper P is facing the liquid application unit 140 (more specifically, the liquid application head 146) (S803). If it is determined that the first liquid application position B1 of the paper P is not facing the liquid application unit 140 (S803: No), the control unit 100b continues conveying the paper P by the conveying roller pair 10 and 11 until the first liquid application position B1 of the paper P faces the liquid application unit 140 (S803: Yes). On the other hand, if it is determined that the first liquid application position B1 of the paper P faces the liquid application head 146 (S803: Yes), the control unit 100b stops conveying the paper P by the conveying roller pair 10 and 11 (S804). The fact that the first liquid applying position B1 of the paper P faces the liquid applying head 146 can be detected by a pulse signal output from a rotary encoder of a motor driving the transport roller pair 10 , 11 .

[0346] The control unit 100b executes a process for the liquid applying unit 140 to apply liquid to the first liquid applying position B1 on the paper P (S805). More specifically, the control unit 100b rotates the application head moving motor 151 in a first direction to bring the liquid applying head 146 into contact with the first liquid applying position B1 on the paper P. Furthermore, the control unit 100b changes the pressing force of the liquid applying head 146 (i.e., the rotation amount of the application head moving motor 151) according to the amount of liquid applied to the paper P.

[0347] The amount of liquid applied to the paper P can be the same for all paper P constituting the paper bundle Pb, or can be different for each paper P. For example, the control unit 100b can reduce the amount of liquid applied to the paper P that is transported later. Furthermore, the rotation amount of the application head moving motor 151 can be determined by a pulse signal output from a rotary encoder of the application head moving motor 151.

[0348] Next, the control unit 100b drives the transport roller pairs 10, 11, 14, and 15 to place the paper P on the inner tray 22 (S806). Furthermore, the control unit 100b moves the side fences 24L and 24R in the main scanning direction to align the positions of the paper P or paper bundle Pb placed on the inner tray 22 in the main scanning direction, a process known as alignment (S806).

[0349] Next, the control unit 100b determines whether the number of sheets of paper P placed on the internal tray 22 has reached the specified number Np indicated by the post-processing command (S807). If the control unit 100b determines that the number of sheets of paper P placed on the internal tray 22 has not reached the specified number Np (S807: No), the control unit 100b repeats the processes of steps S802 to S807 until the number of sheets of paper P placed on the internal tray 22 reaches the specified number Np (S807: Yes).

[0350] On the other hand, when the control unit 100b determines that the number of sheets P placed on the inner tray 22 has reached the predetermined number Np (S807: YES), the pressure bonding unit 32' performs pressure bonding at the first binding position B1 (equivalent to the first liquid application position B1 of the sheets P) including the sheets P to which liquid has been applied by the liquid application unit 140 (S808). Furthermore, the control unit 100b rotates the transport roller pair 15 to discharge the pressure-bonded sheet bundle Pb to the second paper discharge tray 26 (S808).

[0351] Next, the control unit 100b determines whether the number of paper bundles Pb discharged to the second discharge tray 26 has reached the required number of copies Mp indicated by the post-processing command (S809). If the control unit 100 determines that the number of discharged paper bundles Pb has not reached the required number of copies Mp (S809: No), the process of steps S802 to S809 is repeated until the number of discharged paper bundles Pb has reached the required number of copies Mp (S809: Yes).

[0352] On the other hand, when the control unit 100b determines that the number of paper bundles Pb discharged to the second discharge tray 26 has reached the required number Mp (S809: Yes), it drives the liquid applying unit moving motor 137 to move the liquid applying unit 140 to the standby position HP1 (see Figure 40), and drives the crimping portion moving motor 238 to move the crimping portion 32′ to the standby position HP2 (refer to Figure 38 )(S810). In addition, when the posture indicated by the post-processing instruction is the "oblique binding posture", the control unit 100b drives the nozzle moving motor 150 and the crimping unit rotating motor 239 to rotate the liquid applying component 140 and the crimping unit 32' to the parallel binding posture (standby angle) (S810). On the other hand, when the posture indicated by the post-processing instruction is the "parallel binding posture", the action of rotating the liquid applying component 140 and the crimping unit 32' to the parallel binding posture (standby angle) is omitted. In addition, in steps S801 and S810, the execution order of the action of moving the liquid applying component 140 and the crimping unit 32' in the main scanning direction and the action of rotating in the forward and reverse directions is not limited to the above order, and can also be the opposite order to the above order.

[0353] In addition, the present invention can be applied not only to the end binding processing section 25 that performs the end binding process but also to the saddle stitching processing section 28 that performs the saddle stitching process.

[0354] In addition, for Figure 37 The control unit 100b of the post-processing device 3A according to the second embodiment shown in FIG. Figure 1 Similarly, the embodiment in which the image forming apparatus 2 is provided separately from the control unit 100a has been described, but the present invention is not limited to this embodiment. Figure 46 Similarly to (A), the control unit 100b of the post-processing device 3A may also be provided on the side of the image forming device 2. Figure 46 (B) Similarly, the control unit 100 b of the post-processing apparatus 3A may be integrally configured with the control unit 100 a of the image forming apparatus 2 .

[0355] In addition, with Figure 47 Similarly to (A), the control unit 100b of the post-processing device 3A may be functionally divided into a control unit 100b1 (e.g., a drive unit system (motor, etc.)) and a control unit 100b2 (a detection unit system (sensor, etc.)), and the control unit 100b2 of the post-processing device 3A on one side may be provided on the image forming device 2 side. Figure 47 (B) Similarly, the control unit 100 b 2 of the post-processing device 3A provided on the image forming apparatus 2 side may be integrally configured with the control unit 100 a of the image forming apparatus 2 .

[0356] Furthermore, the control method of control unit 100b described above is implemented through the collaboration of computer hardware resources and a computer software program stored in a storage medium. Specifically, the control method is executed by a computer by coordinating the operation of a computing device, storage device, input device, output device, and control device based on the program stored in the storage medium. Alternatively, the program stored in the storage medium can be written to a storage device or storage medium and distributed, or distributed via telecommunications lines.

[0357] The present invention is not limited to the embodiments described above, and various modifications are possible without departing from the technical spirit thereof. The technical matters included in the technical concepts described in the claims are all subject of the present invention. While the above embodiments are preferred examples, those skilled in the art can implement various modifications based on the disclosed content. Such modifications are also included in the technical scope described in the claims.

[0358] [Modes of the Invention]

[0359] The content of the present invention is as follows, for example.

[0360] <1>

[0361] A medium processing device, characterized in that it includes: a liquid applying portion, which applies liquid to a part of at least one medium; a first liquid storage portion, which stores liquid for liquid application by the liquid applying portion; a second liquid storage portion, which stores the liquid supplied to the first liquid storage portion, and a liquid supply unit, which performs a liquid supply action of supplying the liquid from the second liquid storage portion to the first liquid storage portion, and the second liquid storage portion is provided with: a liquid storage tray, which is connected to the liquid supply unit; a liquid storage tank, which stores the liquid and can be loaded and unloaded relative to the liquid storage tray; a locking mechanism, which limits the position of the liquid storage tank mounted on the liquid storage tray.

[0362] <2>

[0363] according to <1> The medium processing device is characterized in that the locking mechanism includes: an engaging portion, which engages with an engaged portion provided on the device frame; an engaging release component, which releases the engaging state between the engaged portion and the engaging portion, and a force-applying component, which applies force to the engaging portion toward the engaged portion, and the engaging portion is moved in a direction to overcome the force of the force-applying component through the engaging release component, thereby releasing the engaging state between the engaging portion and the engaged portion.

[0364] <3>

[0365] according to <2> The medium processing device is characterized in that the shape of the engaging portion includes: a shape having a horizontal surface along the direction and a shape having an inclined surface connected to the horizontal surface, or a shape having an inclined surface to the direction.

[0366] <4>

[0367] According to the above <1> To the above <3> The medium processing device described in any one of the preceding claims is characterized in that: the liquid storage tray has a guiding mechanism for guiding the loading and unloading direction of the liquid storage tank when loading and unloading the liquid storage tank, the guiding mechanism includes a wall portion having a height greater than half of the height dimension of the liquid storage tank, and the height of the guiding mechanism is located at a position lower than that of the locking mechanism.

[0368] <5>

[0369] according to <4> The medium processing device is characterized in that the wall surface portion has a visual confirmation portion that allows visual confirmation of the liquid storage tank mounted on the liquid storage tray.

[0370] <6>

[0371] according to <1> The medium processing device is characterized in that the locking mechanism includes: a locking portion, which is arranged on the liquid storage tray; an engaged portion, which is arranged on the liquid storage tank and engaged with the locking portion, and a force-applying component, which applies force to the locking portion toward the engaged portion. When the liquid storage tank is installed on the liquid storage tray, the locking portion is engaged with the engaged portion by the force-applying component to limit the position of the liquid storage tank.

[0372] <7>

[0373] according to <1> The medium processing device is characterized in that: the locking mechanism has protrusions respectively provided on the liquid storage tank and the liquid storage tray. When the liquid storage tank is installed on the liquid storage tray, the protrusions abut against each other, and at least one of the liquid storage tank and the liquid storage tray is elastically deformed. The protrusions rub against each other and engage with each other to limit the position of the liquid storage tank.

[0374] <8>

[0375] according to <1> The medium processing device is characterized in that the locking mechanism includes: at least two protruding engaging portions arranged on the outer periphery of the liquid storage tank, and at least two protruding engaged portions arranged on the liquid storage tray. After the liquid storage tank is inserted into the liquid storage tray, the protruding engaging portions are engaged with the protruding engaged portions by rotating the liquid storage tank to limit the position of the liquid storage tank.

[0376] <9>

[0377] According to the above <1> To the above <8> The medium processing device according to any one of the preceding claims is characterized in that the liquid storage tray has a liquid supply port connected to the liquid supply unit, and a filter for filtering the liquid is provided on an upstream side of the liquid supply port.

[0378] <10>

[0379] According to the above <1> To the above <9> The medium processing device according to any one of the preceding claims is characterized in that the liquid storage tray includes a liquid detection unit for detecting the stored liquid.

[0380] <11>

[0381] An image forming system, characterized by comprising: an image forming device for forming an image on a medium; and the above-mentioned binding device for binding a plurality of the media on which images are formed by the image forming device. <1> To the above <9> A media processing device according to any one of claims 1 to 6.

Claims

1. A medium processing device, characterized in that include: a liquid applying unit for applying liquid to a portion of at least one medium; a first liquid storage portion storing liquid for liquid application by the liquid application portion; a second liquid storage portion storing the liquid supplied to the first liquid storage portion, and a liquid supply unit configured to supply the liquid from the second liquid storage portion to the first liquid storage portion; and The second liquid storage unit includes: a liquid storage tray connected to the liquid supply unit; a liquid storage tank, which stores the liquid and is attachable to and detachable from the liquid storage tray; A locking mechanism limits the position of the liquid storage tank mounted on the liquid storage tray.

2. The medium processing device according to claim 1, characterized in that The locking mechanism comprises: A clamping portion, which is clamped with a clamped portion provided on the device frame; an engagement releasing member for releasing the engagement between the engaged portion and the engaging portion, and a force applying member that applies force to the engaging portion toward the engaged portion, and The engagement releasing member moves the engaging portion in a direction that overcomes the biasing force of the biasing member, thereby releasing the engagement between the engaging portion and the engaged portion.

3. The medium processing device according to claim 2, characterized in that The shape of the engaging portion includes: A shape having a horizontal surface along the direction and a shape having an inclined surface connected to the horizontal surface, or a shape having an inclined surface with respect to the direction.

4. The medium processing device according to any one of claims 1 to 3, characterized in that: The liquid storage tray has a guide mechanism for guiding the loading and unloading direction of the liquid storage tank when loading and unloading the liquid storage tank. The guide mechanism includes a wall portion having a height equal to or greater than half the height of the reservoir. The guide mechanism is located at a lower height than the locking mechanism.

5. The medium processing device according to claim 4, characterized in that: The wall surface portion includes a visual confirmation portion that allows visual confirmation of the liquid storage tank mounted on the liquid storage tray.

6. The medium processing device according to claim 1, characterized in that The locking mechanism comprises: a clamping portion, which is provided on the liquid storage tray; an engaged portion, which is provided on the liquid storage tank and engaged with the engaging portion, and a force applying member for applying force to the engaging portion toward the engaged portion, When the reservoir tank is mounted on the reservoir tray, the engaging portion is engaged with the engaged portion by the urging member, thereby restricting the position of the reservoir tank.

7. The medium processing device according to claim 1, wherein: The locking mechanism has protrusions respectively provided on the liquid storage tank and the liquid storage tray. When the reservoir tank is mounted on the reservoir tray, the projections abut against each other, causing at least one of the reservoir tank and the reservoir tray to elastically deform. The projections rub against each other and engage with each other, thereby restricting the position of the reservoir tank.

8. The medium processing device according to claim 1, characterized in that The locking mechanism comprises: At least two protruding engaging portions are provided on the outer periphery of the liquid storage tank, and At least two protruding engaging portions are provided on the liquid storage tray. After the reservoir tank is inserted into the reservoir tray, the reservoir tank is rotated to engage the protruding engaging portion with the protruding engaged portion, thereby restricting the position of the reservoir tank.

9. The medium processing device according to claim 1, wherein: The liquid storage tray has a liquid supply port connected to the liquid supply unit, and A filter for filtering the liquid is provided on the upstream side of the liquid supply port.

10. The medium processing device according to claim 1, wherein: The liquid storage tray includes a liquid detection unit for detecting the stored liquid.

11. An image forming system, characterized in that include: an image forming device that forms an image on the medium, and The medium processing device according to any one of claims 1 to 3, which performs pressure binding on a plurality of the media on which images have been formed by the image forming device.

Images