Laminating apparatus and image forming system

Abstract

The present invention relates to a laminating apparatus and an image forming system, which disperses paste overflowing from two overlapped sheets to both heat fixing rollers, prevents the two overlapped sheets from being wound on the heat fixing rollers, and enables to obtain a stable laminated quality with less curling. The laminating apparatus includes a heat fixing section which performs heating and pressurizing while transporting two overlapped sheets of sheet media held by a nip, the heat fixing section including: a pair of heat fixing rollers which transport the two overlapped sheets; a heating mechanism which heats the pair of heat fixing rollers; a temperature detecting mechanism which detects temperatures of the pair of heat fixing rollers, respectively; and a driving mechanism which drives the pair of heat fixing rollers, the pair of heat fixing rollers being composed of a shaft portion located at a center portion, an elastic layer provided around the shaft portion, and a fluororesin layer provided on a surface of the elastic layer, the pair of heat fixing rollers having substantially the same diameter, substantially the same hardness, and substantially the same surface releasability.

Description

Technical Field

[0001] This invention relates to a lamination processing apparatus and an image forming system. Background Technology

[0002] Known lamination techniques involve inserting inserts (paper, photographs, etc.) between two overlapping sheets (laminates or films) that are joined at one side, and applying heat and pressure to bond the two overlapping sheets together.

[0003] The lamination apparatus for performing lamination processing includes a heat fixing section that applies heat and pressure to two overlapping sheets. The heat fixing section has a pair of heated and rotated heat fixing rollers that form a clamping section through which the two overlapping sheets pass. By passing the two overlapping sheets, which are holding a sheet-like medium, through this clamping section, the two overlapping sheets can be heat-fixed (bonded).

[0004] In the field of thermal fixing, a fixing device (hereinafter referred to as a fixing device) of an image forming apparatus is known. This fixing device generally has a heating roller that heats and conveys the image side of the recording medium and a pressure roller that pressurizes and conveys the other side of the recording medium, and performs fixing processing by heating and pressing the recording medium.

[0005] For example, in the fixing apparatus disclosed in Patent Document 1, in order to reduce thermal damage to the fixing components, an elastic layer is provided on the core shaft of the fixing roller component, and a heat-resistant release layer made of fluororesin or the like is formed on the surface layer. Furthermore, a configuration (temperature sensor and drive device, etc.) is disclosed that switches the abnormal temperature detection level according to the operating status of the fixing apparatus.

[0006] However, when the above-described fixing device is applied to a lamination processing apparatus (thermal fixing unit), the following problems arise.

[0007] (Question 1)

[0008] Because the heating roller and pressure roller in the fixing unit have different materials and hardness, the curvature of the clamping part will be greater. When this configuration is applied to a lamination process, two overlapping sheets (made of resin) will be heated under a state of high curvature, and the sheets after heat fixing will curl.

[0009] (Question 2)

[0010] To collect residual toner on the side of the pressure roller located on the non-image side, the fixing unit only applies a fluoropolymer layer with good release properties to the surface layer of the heating roller. When this configuration is applied to a lamination process, the paste (adhesive) overflowing from the two overlapping sheets (laminate) adheres to one side of the roller, and the sheet is then pasted and rolled onto that roller.

[0011] If two overlapping sheets of paper get stuck onto the roller, they are not easy for ordinary users to remove and require professional repair. To prevent this, the sheets need to be cleaned and passed through paper after each use to remove the paste adhering to the roller, which becomes a burden for users.

[0012] Therefore, the object of the present invention is to provide a lamination processing apparatus that disperses the paste overflowing from two overlapping sheets onto the heat fixing rollers on both sides, preventing the two overlapping sheets from rolling onto the heat fixing rollers, while obtaining a stable lamination quality with less curling.

[0013] [Patent Document 1] Japanese Patent Application Publication No. 2005-141974 Summary of the Invention

[0014] The aforementioned problem is solved by a lamination processing apparatus characterized by a heat fixing section that simultaneously conveys, heats, and pressurizes two overlapping sheets holding a sheet-like medium. The heat fixing section includes: a pair of heat fixing rollers for conveying the two overlapping sheets; a heating mechanism for heating the pair of heat fixing rollers respectively; a temperature detection mechanism for detecting the temperature of the pair of heat fixing rollers respectively; and a driving mechanism for driving the pair of heat fixing rollers respectively. Each pair of heat fixing rollers is composed of a mandrel portion located at a center, an elastic layer disposed around the mandrel portion, and a fluoropolymer layer disposed on the surface of the elastic layer. The pair of heat fixing rollers has the same diameter and the same hardness, and possesses the same surface release properties.

[0015] The lamination apparatus of the present invention, because the thermal fixing rollers have the same material, the same diameter, the same hardness, and the same surface release properties, allows paste overflowing from the two overlapping sheets to be dispersed on both thermal fixing rollers, preventing the two overlapping sheets from curling onto the thermal fixing rollers. Furthermore, because the two overlapping sheets can be heated and pressurized evenly from both sides, stable lamination quality with minimal curling can be obtained. Attached Figure Description

[0016] Figure 1 The diagram shown is an overall configuration diagram of a sheet processing apparatus according to one embodiment of the present invention.

[0017] Figure 2 What is shown is Figure 1 A structural diagram of the main parts of the sheet processing apparatus (Figure 1).

[0018] Figure 3 The diagram shown is a structural diagram of the main parts of the sheet processing device (Figure 2).

[0019] Figure 4 The diagram shown is a structural diagram of the main parts of the sheet processing device (Figure 3).

[0020] Figure 5 The diagram shown is a structural diagram of the main parts of the sheet processing device (Figure 4).

[0021] Figure 6 The diagram shown is a structural diagram of the main parts of the sheet processing device (Figure 5).

[0022] Figure 7 The diagram shown is a structural diagram of the main parts of the sheet processing apparatus (Figure 6).

[0023] Figure 8 The diagram shown is a structural diagram of the main parts of the sheet processing device (Figure 7).

[0024] Figure 9 The diagram shown is a structural diagram of the main parts of the sheet processing apparatus (Figure 8).

[0025] Figure 10 The diagram shown is a configuration diagram (1) of the single-page insertion mode of the sheet processing device.

[0026] Figure 11 The diagram shown is a configuration diagram (2) of the single-page insertion mode of the sheet processing device.

[0027] Figure 12 The diagram shown is a configuration diagram (3) of the single-page insertion mode of the sheet processing device.

[0028] Figure 13 The diagram shown is a configuration diagram (1) of the multi-page insertion mode of the sheet processing device.

[0029] Figure 14 The diagram shown is a configuration diagram (2) of the multi-page insertion mode of the sheet processing device.

[0030] Figure 15 The diagram shown is a configuration diagram (3) of the multi-page insertion mode of the sheet processing device.

[0031] Figure 16 The diagram shown is a configuration diagram (4) of the multi-page insertion mode of the sheet processing device.

[0032] Figure 17 The diagram shown is a structural diagram of the main parts of the sheet processing apparatus (Figure 9).

[0033] Figure 18 The diagram shows a peeling component of a sheet processing device.

[0034] Figure 19 (a) and (b) are schematic diagrams of an example of the drive configuration of the stripping component.

[0035] Figure 20 The image shown is a perspective view of the stripping component inserted into sheet S.

[0036] Figure 21 What is shown is Figure 8 A three-dimensional view of the state of the peeled-off parts and sheet S.

[0037] Figure 22 What is shown is Figure 8 A three-dimensional view of the state of the peeling component and sheet S (Figure 2).

[0038] Figure 23 (a)-(c) show variations of the guide paths for the two sheets being peeled off.

[0039] Figure 24 The diagram shown is an overall configuration diagram of an example of a lamination processing apparatus equipped with the sheet processing apparatus according to the present invention.

[0040] Figure 25 The diagram shown is an overall configuration diagram of an image forming apparatus having the lamination processing apparatus according to the present invention.

[0041] Figure 26 The diagram shown is an overall configuration diagram of a modified example of an image forming apparatus equipped with the lamination processing apparatus according to the present invention.

[0042] Figure 27 The diagram shown is an overall configuration diagram (1) of an image forming apparatus externally equipped with the lamination processing apparatus involved in this invention.

[0043] Figure 28 The diagram shown is an overall configuration diagram (2) of an image forming apparatus externally equipped with the lamination processing apparatus involved in this invention.

[0044] Figure 29 The diagram shows the hardware structure of the control module for the lamination process device.

[0045] Figure 30 The diagram shows a flowchart illustrating a series of actions from the initial insertion of inserts into the sheet feed until the lamination process is completed.

[0046] Figure 31 The diagram shown is a configuration diagram of one embodiment of the fixing section of the lamination processing apparatus according to the present invention.

[0047] Figure 32 The diagram shown is a schematic representation of the configuration of a thermal fixing roller pair according to one embodiment of the present invention.

[0048] Figure 33 The diagram shows a state in which the paste accumulated on the surface of a conventional thermal fixing roller causes the contact temperature sensor to float.

[0049] Figure 34The diagram shown is a configuration diagram of the thermal fixing unit and the first and second conveying roller pairs according to one embodiment of the present invention.

[0050] Figure 35 The diagram shows a conveying of a sheet with inserts according to an embodiment of the present invention. (a) shows the conveying between a first pair of conveying rollers and a pair of thermal fixing rollers, and (b) shows the conveying between a pair of thermal fixing rollers and a second pair of conveying rollers.

[0051] Figure 36 The diagram shows a thermal fixing roller pair capable of changing the center-to-center distance according to an embodiment of the present invention. (a) shows the contact state, and (b) shows the separation state.

[0052] Figures 37(a) and (b) show the configuration of the moving mechanism that makes the thermal fixing rollers 120 abut and separate. Detailed Implementation

[0053] Figure 1 The diagram shown is an overall configuration diagram of a sheet processing apparatus according to one embodiment of the present invention. The sheet processing apparatus 100 of this embodiment peels two overlapping sheets (hereinafter referred to as sheets S) from each other and inserts a sheet-like medium (hereinafter referred to as insert P) into the peeled sheet S and clamps it in place.

[0054] Here, sheet S refers to two overlapping sheets, with a portion (or one side) of each sheet joined at the joint r. The two overlapping sheets can be, for example, a translucent sheet with one side being a transparent polyester sheet and the opposite side being a transparent or opaque sheet, joined together at one side. Additionally, laminated film is also included in the two overlapping sheets.

[0055] Insert P is an example of sheet-like media inserted between two overlapping sheets. Sheet-like media include not only plain paper, but also thick paper, postcards, envelopes, thin paper, coated paper (such as coated paper or art paper), tracing paper, OHP sheets, etc.

[0056] like Figure 1 As shown, the sheet processing apparatus 100 includes a sheet tray 102 as a first loading mechanism for loading sheet S, a pick-up roller 105 for supplying sheet S from the sheet tray 102, and a pair of conveying rollers 107. Additionally, the sheet processing apparatus 100 includes a paper feed tray 103 as a second loading mechanism for loading insert P, and a pick-up roller 106 for supplying insert P from the paper feed tray 103.

[0057] A size sensor C6 is provided in the sheet tray 102 as a sheet size detection mechanism for detecting the size (length in the conveying direction) of the sheet S, and a size sensor C7 is provided in the paper feed tray 103 as a media size detection mechanism for detecting the size (length in the conveying direction) of the insert P.

[0058] These size sensors C6 and C7 each have multiple sensors arranged side-by-side in the conveying direction. Since the sensor detection results vary depending on the dimensions of the loaded sheet S and insert P, the conveying length of the sheet S and insert P can be detected.

[0059] Downstream of the conveying roller pair 107 in the conveying direction, a conveying sensor C1 is provided to detect the conveying position of the sheet S, and downstream of the pickup roller 106 in the conveying direction, a conveying sensor C2 is provided to detect the conveying position of the insert P.

[0060] Alternatively, these conveying sensors C1 and C2 can also be used to detect the conveying length of the sheet S (or insert P).

[0061] Furthermore, downstream of the conveying roller pair 107 and the pickup roller 106, the sheet processing apparatus 100 includes an inlet roller pair 108 serving as a first conveying mechanism, a winding roller 109 serving as a rotating component, an outlet roller pair 113 serving as a second conveying mechanism, and a paper discharge tray 104. Between the winding roller 109 and the outlet roller pair 113 is a peeling member 116 configured to move in the width direction of the sheet S.

[0062] A conveying sensor C3 is installed downstream of the inlet roller pair 108 in the conveying direction to detect the conveying position of the sheet S and the insert P. An abnormal state detection sensor C4 is installed downstream of the winding roller 109 in the conveying direction to detect the state of the sheet S. Then, a conveying sensor C5 is installed downstream of the outlet roller pair 113 in the conveying direction to detect the conveying position of the sheet S.

[0063] In addition, the pickup roller 105, the conveyor roller pair 107, the inlet roller pair 108, and the winding roller 109 are examples of the first conveying mechanism, while the pickup roller 106, the inlet roller pair 108, and the winding roller 109 are examples of the second conveying mechanism.

[0064] An operation panel 10, serving as a display and operation mechanism, is provided in the external components of the sheet processing apparatus 100. This operation panel 10 displays information and accepts operation inputs from the sheet processing apparatus 100. Furthermore, the operation panel 10 also functions as a notification mechanism that sends sensing signals to the user. Alternatively, the sheet processing apparatus 100 may be configured with a notification mechanism other than the operation panel 10.

[0065] The sheet processing apparatus 100 of this embodiment stacks sheet S and insert P on different sheet trays 102 and paper feed trays 103. While conveying sheet S, it peels and opens sheet S into two sheets, and inserts insert P into the opening. Then, sheet S with insert P inserted is discharged and stacked on paper discharge tray 104.

[0066] Figure 2 What is shown is Figure 1 A structural diagram of the main components of the sheet processing apparatus (Figure 1). For example... Figure 2 As shown, the inlet roller pair 108 and the outlet roller pair 113 are, for example, two pairs of rollers, and are powered by the inlet roller pair motor 108a (see reference). Figure 29 ) and the outlet roller pair motor 113a (refer to) Figure 29 The sheet S and insert P are rotated by the inlet roller pair 108 rotating in one direction and the outlet roller pair 113 rotating in both directions.

[0067] The inlet roller pair 108 conveys the sheet S and insert P toward the outlet roller pair 113. This conveying direction is called the forward conveying direction. Figure 2 (The direction of arrow A).

[0068] On the other hand, the exit roller pair 113 can switch its rotation to both forward and reverse directions. This allows the clamped sheet S to be directed towards the forward conveying direction, i.e., the paper tray 104 (see reference). Figure 1 While conveying the material, it can also convey the sheet S in the opposite direction (pull-back direction) of the winding roller 109. The direction of conveying towards this winding roller 109 (the opposite direction to the forward conveying direction) is called the reverse conveying direction. Figure 2 (The direction of arrow B).

[0069] In addition, the sheet processing apparatus 100 is provided with a sheet peeling section 1 between these inlet roller pairs 108 and outlet roller pairs 113. The sheet peeling section 1 has a winding roller 109 as a rotating component and a peeling component 116. The winding roller 109 is powered by a winding roller motor 109a (see reference). Figure 29 It is driven by rotation in both directions and can switch the rotation between the two directions (clockwise / counterclockwise).

[0070] The winding roller 109 has a roller member 111 and a movable gripping mechanism 110 disposed on the roller member 111 for gripping the sheet S. The gripping mechanism 110 is configured to be driven by a gripping mechanism motor 110a (see reference). Figure 29It can rotate relative to the roller member 111. Then, the movable gripping mechanism 110 is characterized in that it grips the front end of the sheet S between itself and the roller member 111. The gripping mechanism 110 described above is for the case where it is constructed from a different part from the roller member 111, but the gripping mechanism 110 may also be integrally formed on the outer periphery of the roller member 111.

[0071] Next, use Figures 1 to 17 This describes a series of operations of the sheet processing apparatus 100, from the peeling of the sheet S to the insertion of the insert P. Additionally, in Figures 3 to 17 In the middle, to and Figure 1 , 2 Identical components are given the same symbols, and their detailed descriptions are omitted.

[0072] exist Figure 1 In the process, the sheet S on the sheet tray 102 is stacked such that the joined portion (joint portion r) of two sheets is located downstream of the pick-up roller 105 in the supply direction (conveyance direction). Then, the sheet processing device 100 picks up the sheet S on the sheet tray 102 by the pick-up roller 105 and conveys it towards the inlet roller pair 108 by the conveyor roller pair 107.

[0073] Next, as Figure 2 As shown, the sheet S is conveyed toward the winding roller 109 via the inlet roller pair 108. Here, the sheet handling device 100 uses the side where one end of one of the four sides of the sheet S is joined as the positive conveying direction. Figure 2 It is transported downstream of the direction of arrow A.

[0074] Next, as Figure 3 As shown, at the point in time when the rear end of the sheet S in the forward conveying direction passes the winding roller 109, the sheet handling device 100 temporarily stops its conveying. Furthermore, these actions are triggered by the detection of the front end of the sheet S by the conveying sensor C3, and are implemented by conveying a specified amount from the conveying sensor C3.

[0075] Next, as Figure 4 As shown, the sheet processing apparatus 100, while opening the gripping mechanism 110, reverses the rotation direction of the exit roller pair 113 and directs the sheet S toward the opening of the gripping mechanism 110 in the reverse conveying direction. Figure 4 Transport in the direction of arrow B.

[0076] Next, as Figure 5 As shown, at the moment when the end of the sheet S is inserted into the open gripping mechanism 110, the sheet handling device 100 stops feeding and closes the gripping mechanism 110 to grip the end of the sheet S. Furthermore, these actions are performed by feeding a specified amount of sheet S.

[0077] Next, as Figure 6 As shown, the sheet processing apparatus 100 rotates the winding roller 109 counterclockwise to wind the sheet S onto the winding roller 109. Here, the sheet S is wound onto the winding roller 109 starting from the side of the two sheets that are not joined together.

[0078] like Figure 7 As shown, when sheet S is wound onto winding roller 109, due to the difference in winding circumference (difference in winding amount) between the two overlapping sheets, excess sheet material on the inner circumference side causes slack towards the joint end (joint portion r) of sheet S. This results in a space g (slack space) between the two sheets. By inserting peeling member 116 from both sides of sheet S into this space g, the space g between the two sheets can be reliably maintained. Furthermore, these actions are triggered by the detection of the leading edge of sheet S by conveying a specified amount from conveying sensor C5.

[0079] Here, we will provide further explanation of the stripping component 116.

[0080] Figure 18 The diagram shown is a schematic of the peeling component included in the sheet processing apparatus 100. Figure 19 The diagram shown is a schematic representation of an example of the drive configuration of the stripping component 116. Additionally, Figure 20 The image shown is a perspective view of the sheet S with the peeling component 116 inserted.

[0081] like Figure 18 As shown, viewed from the upstream side of the conveying direction, the height dimension of the peeling member 116 gradually increases from the center towards the rear end in the width direction. Furthermore, viewed from the height direction, the conveying dimension gradually increases from the front end towards the center. Then, viewed from the width direction of the sheet S, the peeling member 116 has a cross shape. Due to this cross shape, the peeling member 116 also functions as a branch member that guides the peeled sheet S in different directions.

[0082] In addition, such as Figure 19 As shown, in this embodiment, the two stripping members 116 are arranged facing each other and are brought closer to / separated by (a) a belt drive or (b) a rack and pinion, etc.

[0083] Specifically, in the belt drive of (a), a belt 32 is tensioned between the drive pulley 30a and the driven pulley 30b, and two stripping members 116a and 116b are mounted opposite each other on the belt 32. Here, the stripping member 116a on one side is connected to the lower belt 32, and the stripping member 116b on the other side is connected to the upper belt 32.

[0084] Additionally, a drive transmission gear 34 is provided on the drive pulley 30a, and the rotational output of the stripping component motor 36 is transmitted to the drive transmission gear 34 via the motor output gear 35. That is, the rotational output of the stripping component motor 36 is transmitted to the belt 32.

[0085] Therefore, if the peeling component motor 36 (viewed from the front of the figure) is rotated clockwise, the peeling components 116a and 116b can approach each other, and if the peeling component motor 36 is rotated counterclockwise, the peeling components 116a and 116b can separate from each other.

[0086] Furthermore, in the rack and pinion assembly (b), two racks 42a and b, meshing with a pinion 40, extend in opposite directions, and two stripping components 116a and b are mounted opposite each other on the respective racks 42a and b. A drive transmission gear 44 is provided on the pinion 40, and the rotational output of the stripping component motor 36 is transmitted to this drive transmission gear 44 via a motor output gear 45. That is, the rotational output of the stripping component motor 36 is transmitted to the racks 42a and b.

[0087] Therefore, if the peeling component motor 46 (viewed from the front of the figure) is rotated clockwise, the peeling components 116a and 116b can approach each other, and if the peeling component motor 46 is rotated counterclockwise, the peeling components 116a and 116b can separate from each other.

[0088] Thus, the peeling member 116 of this embodiment has the above-described shape and is configured to move along the width direction of the sheet S, so as... Figure 20 As shown, it can be smoothly inserted into the space g created in the sheet S.

[0089] Returning to the description of the series of operations of the sheet processing apparatus 100. In the state where the peeling member 116 is inserted into the space g created by the sheet S (refer to...) Figure 7 The sheet processing device 100 rotates the winding roller 109 clockwise, and as... Figure 8 As shown, the space for peeling sheet S is moved to the forward conveying direction of sheet S. Figure 2 The rear end of the sheet S is located in the direction of arrow A. Then, at a specified time point, the gripping mechanism 110 is opened, causing the rear end of the sheet S to be in a state of vertical separation.

[0090] In this state, the sheet processing apparatus 100 temporarily stops the feeding of sheet S, and then peels off the entire rear end area of ​​sheet S by moving the peeling member 116 further in the sheet width direction. Furthermore, these actions are triggered by the detection of the front end of sheet S by the feed sensor C5, and are implemented by feeding a specified amount from the feed sensor C5.

[0091] Figure 21What is shown is Figure 8 A perspective view of the peeling member 116 and the sheet S in their respective states. The peeling member 116 also functions as a branching member that guides the peeled sheet S in different directions (see reference). Figure 18 (The cross-shaped shape) thus allows the two sheets of sheet S to be transported on different paths.

[0092] Furthermore, since the peeling member 116 is configured to move along the width direction (see reference...), Figure 19 Therefore, as Figure 22 As shown, it can be configured in a position that appropriately supports the posture of the sheet S. Therefore, even if the size or stiffness of the sheet S changes, the sheet S can be guided in the desired branching direction. This is because, in order to branch the sheet S along its entire width, there is no need to separately install a branching component and a drive device for that branching component, thus reducing costs compared to the past.

[0093] Next, as Figure 9 As shown, starting from the state where the entire area of ​​the rear end of the sheet S has been peeled off, this time the sheet processing device 100 rotates the exit roller pair 113 counterclockwise and moves the sheet S in the reverse conveying direction ( Figure 9 The sheet is conveyed in the direction of arrow B. That is, the two sheets of sheet S to be peeled off are guided upward and downward by the peeling member 116, so that the two sheets are peeled off from each other as a whole.

[0094] Then, the sheet handling device 100 temporarily stops the conveying of the sheet S and enters a state where the joint portion r of the sheet S is held (clamped) by the exit roller pair 113. As a result, the sheet S is opened up to a greater extent, with the joined side as the end.

[0095] In addition, these actions are triggered by the detection of the front end of the sheet S by the conveying sensor C5, and are implemented by conveying a specified amount from the conveying sensor C5.

[0096] Next, the action of inserting inserts into the peeled sheet S will be explained.

[0097] The sheet processing apparatus 100 of this embodiment can insert one or more inserts P into the sheet S according to the size (length in the transport direction) of the sheet S and the size (length in the transport direction) of the insert P. First, using Figures 10-12 This describes the single-page insertion mode for inserting one insert P into sheet S. Then, use... Figures 13-16 This describes a multi-page insertion mode where multiple inserts P are inserted into sheet S along the conveying direction.

[0098] (Single-page insertion mode)

[0099] like Figure 10As shown, the sheet processing device 100 rotates the inlet roller pair 108 to feed the paper tray 10 (refer to...) Figure 1 The incoming insert P is directed towards the exit roller 113 in the forward conveying direction. Figure 10 Transport in the direction of arrow A.

[0100] Next, as Figure 11 As shown, the sheet processing device 100 rotates the exit roller pair 113 to bring the sheet S and the insert P together, and inserts the insert P into the open sheet S.

[0101] Next, as Figure 12 As shown, the sheet handling device 100 conveys the sheet S with the insert P inserted in the forward conveying direction via the exit roller pair 113. Figure 12 The two sheets of sheet S are conveyed (in the direction of arrow A), overlapped again, and the opening is closed. Then, they are conveyed through exit roller pair 113 or discharge roller pair 121 configured after it (see...). Figure 24 This allows the sheet S with insert P inserted to be discharged and stacked onto the paper tray 104 (see reference). Figure 1 ).

[0102] (Multi-page insertion mode)

[0103] Next, the multi-page insertion mode will be explained. The multi-page insertion mode is a mode in which multiple inserts P (two in the following embodiment) can be inserted in the sheet transport direction of a sheet S.

[0104] like Figure 13 As shown, the sheet processing device 100 rotates the inlet roller pair 108 to feed the paper tray 103 (see reference). Figure 1 The first insert P (hereinafter referred to as the first insert P1) is conveyed towards the exit roller pair 113 in the forward conveying direction. Figure 13 Transport in the direction of arrow A.

[0105] Next, as Figure 14 As shown, the sheet handling device 100 rotates the exit roller pair 113 to bring the sheet S and the first insert P1 together, and inserts the first insert P1 into the open sheet S. At this time, the paper feed tray 103 (see reference) Figure 1 The second insert P (hereinafter referred to as the second insert P2) is conveyed towards the exit roller pair 113 in the forward conveying direction. Figure 14 Transport in the direction of arrow A.

[0106] Next, as Figure 15 As shown, the sheet processing device 100 rotates the inlet roller pair 108 to bring the sheet S and the second insert P2 together, and further inserts the second insert P2 into the open sheet S.

[0107] Then, as Figure 16As shown, the sheet processing device 100 conveys the sheet S with the first insert P1 and the second insert P2 inserted in the forward conveying direction via the exit roller pair 113. Figure 16 The two sheets of sheet S are conveyed in the direction of arrow A, overlapped again, and the opening is closed.

[0108] Furthermore, even if there are 3 or more inserts P, by repeatedly performing the above actions, it is possible to insert 3 inserts P into the sheet S.

[0109] As an alternative example, the wafer processing apparatus includes a heat pressurization device capable of heating and pressurizing wafer S (see reference). Figure 24 When the heat fixing roller is at 120, it is like... Figure 17 As shown, the path can also be switched via branch component 118 to deliver the material to the heat pressurization unit. This applies not only to multi-page insertion mode but also to single-page insertion mode.

[0110] Thus, the sheet processing apparatus 100 of this embodiment can control the insertion processing of the insert P into the sheet S.

[0111] Next, the structure of the dimensions (length in the conveying direction) of the sheet S and insert P obtained by the sheet processing apparatus 100 and the number of inserts P inserted will be explained.

[0112] As before Figure 1 As shown, the sheet processing apparatus 100 of this embodiment includes a size sensor C6 serving as a sheet size detection mechanism and a size sensor C7 serving as a media size detection mechanism. Based on the detection results of these sensors, when the length of the insert P in the transport direction is below a threshold, the sheet processing apparatus 100 automatically switches to a multi-page insertion mode for insertion processing. On the other hand, when the length of the insert P in the transport direction is above the threshold, it automatically switches to a single-page insertion mode for insertion processing.

[0113] In particular, when the length of the insert P in the transport direction is less than half the length of the sheet S in the transport direction, it can automatically switch to multi-page insertion mode for insertion. Furthermore, in multi-page insertion mode, the number of inserts P sandwiched between sheets S is calculated from the quotient of the size of sheet S and the size of insert P.

[0114] Alternatively, transport sensors C1 and C2 can be used to replace or be added to the aforementioned size sensors C6 and C7.

[0115] Thus, the sheet processing apparatus 100 of this embodiment can automatically control the insertion process according to the size of the sheet S and the insert P.

[0116] Furthermore, such as Figure 1As shown, the sheet handling apparatus 100 of this embodiment loads the sheet S and insert P onto different trays, allowing them to be transported separately. Therefore, it eliminates the need to load the sheet S and insert P in a predetermined order, improving convenience. Furthermore, in this embodiment, the sheet S is loaded onto tray 102 and the insert P onto tray 103, but this is not a limitation. Alternatively, the insert P may be loaded onto tray 102 and the sheet S onto tray 103.

[0117] (Modified Example)

[0118] Figure 23 The diagram shows a variation of the guide path for peeling two sheets. For example... Figure 9 As already shown, Figure 23 (a) shows two sheets being peeled off together, starting from the joint r of sheet S, in the opposite direction to the conveying direction. Figure 23 The direction of arrow B in (a) is the guiding direction. In addition, such as... Figure 23 As shown in (b), the upper side of the two sheets to be peeled off can also be moved towards the conveying direction starting from the joint r of sheet S. Figure 23 (b) Guided by arrow A, the lower sheet is directed in the opposite direction to the conveying direction. Furthermore, as... Figure 23 As shown in (c), the upper sheet can also be guided in the opposite direction to the conveying direction, and the lower sheet can also be guided in the conveying direction. Additionally, as... Figure 9 As shown, after the peeling component 116 branches, the two sheets being peeled are guided together in a direction opposite to the conveying direction. However, after the peeling component 116 branches, the two sheets being peeled can also be guided together in the same direction as the conveying direction.

[0119] Next, a lamination processing apparatus and an image forming system equipped with the sheet processing apparatus according to the present invention will be described.

[0120] Figure 24 The diagram shown is an overall configuration diagram of an example of a laminating apparatus equipped with the sheet processing apparatus according to the present invention. The laminating apparatus 200 includes the sheet processing apparatus 100 described above, a branch member 118 for switching the conveying path of the sheet S, a pair of heat fixing rollers 120 as a heat pressing member capable of heating and pressurizing the sheet S, and a discharge roller 121 disposed downstream of the pair of heat fixing rollers 120.

[0121] The lamination apparatus 200 is configured to perform a series of actions in one unit, including feeding the sheet S, peeling it off, inserting the insert P, and laminating it by applying heat and pressure. This series of actions can be performed automatically without manual intervention, which improves convenience compared to existing technologies.

[0122] Figure 25 The diagram shown is an overall configuration diagram of an image forming system incorporating the lamination processing apparatus and the image forming apparatus according to the present invention. This image forming system 3001 has a lamination processing apparatus 200a serving as a lamination processing unit within the paper discharge section of the image forming apparatus 300.

[0123] Here, the lamination processing apparatus 200a is capable of supplying the sheet S and / or insert P from the image forming apparatus 300 while having a sheet tray 102 for loading the sheet S or insert P. Therefore, an image can be formed onto the sheet S or insert P in an online manner via the image forming apparatus 300 (e.g., a printer, copier, etc.).

[0124] The configuration of the image forming apparatus 300 will be described in detail. For example... Figure 25 As shown, an intermediate transfer device 150 is provided within the image forming apparatus 300. The intermediate transfer device 150 is wound around multiple rollers to tension the annular intermediate transfer belt 152 approximately horizontally and to move it in a counterclockwise direction.

[0125] Below the intermediate transfer device 150, cyan, magenta, yellow, and black imaging devices 154c, 154m, 154y, and 154k are arranged in a four-tank configuration along the tension direction of the intermediate transfer belt 152. Each imaging device 154 is configured such that a charging device, developing device, transfer device, and cleaning device are arranged around a clockwise rotating drum-shaped image carrier. An exposure device 156 is located below each imaging device 154.

[0126] A paper feeding device 158 is provided below the exposure apparatus 156. The paper feeding device 158 has a first paper feeding cassette 160 for storing sheet material S and a second paper feeding cassette 162 for storing insert page P. Furthermore, the first paper feeding cassette 160 is an example of a third loading mechanism for loading two overlapping sheets, and the second paper feeding cassette 162 is an example of a fourth loading mechanism for loading sheet-like media.

[0127] At the upper right of the first paper feed cassette 160, a first paper feed roller 166 is provided to feed the sheets S inside the first paper feed cassette 160 one by one into the paper transport path 164. Additionally, at the upper right of the second paper feed cassette 162, a second paper feed roller 168 is provided to feed the inserts P inside the paper feed cassette one by one into the paper transport path 164.

[0128] The paper transport path 164 is formed from bottom to top on the right side within the image forming apparatus 300 and leads to the lamination processing apparatus 200a within the image forming apparatus 300. The paper transport path 164 is sequentially provided with a pair of transport rollers 170, a secondary transfer device 174 that abuts against the intermediate transfer belt 152, a fixing device 176, and a first paper row device 178 consisting of a row of paper rollers.

[0129] Furthermore, the first paper feed roller 166, the conveying roller pair 170, and the paper conveying path 164 are examples of a third paper feed mechanism that supplies two overlapping sheets (sheets S) from the first paper feed cassette 160 (the third loading mechanism). Also, the second paper feed roller 168, the conveying roller pair 170, and the paper conveying path 164 are examples of a fourth paper feed mechanism that supplies sheet-like media (inserts P) from the second paper feed cassette 162 (the fourth loading mechanism). Furthermore, the intermediate transfer device 150 and the fixing device 176 are examples of image forming units that form images on sheet-like media (inserts P).

[0130] Next, in the image forming apparatus 300 of this embodiment, the operation of laminating after forming an image on a sheet-like medium (insert P) will be described.

[0131] When forming an image on a sheet-like medium (insert P), firstly, the image reading device 188 reads the original image and the exposure device 156 writes it. Next, toner images of various tones are formed on the respective image carriers of each imaging device 154c, 154m, 154y, and 154k, and these toner images are sequentially transferred to primary transfer devices 180c, 180m, 180y, and 180k, thereby forming a color image on the intermediate transfer belt 152.

[0132] On the other hand, the image forming apparatus 300 rotates the second paper feed roller 168 to feed the insert P out successively and into the paper transport path 164. Then, the paper is transported by the transport roller pair 170 through the paper transport path 164 and fed into the secondary transfer device 174 in a timely manner. As described above, the color image formed on the intermediate transfer belt 152 is transferred onto the insert P through the secondary transfer device 174.

[0133] After the image transfer insert P is fixed in the fixing device 176, it is conveyed by the first paper feeding device 178 to the lamination processing device 200a.

[0134] Additionally, the lamination processing apparatus 200a rotates the pickup roller 105 and supplies the sheet S loaded on the tray 102 to the sheet peeling section 1 (winding roller 109, peeling member 116). Then, in the sheet peeling section 1, the sheet S is peeled into two sheets, and an insert P from the image forming apparatus 300 is conveyed through the inlet roller pair 108, thereby inserting the insert P between the two peeled sheets. Then, the sheet S with the insert P inserted is conveyed to the thermal fixing section 50 through the outlet roller pair 113, and the sheet S with the insert P inserted is heated and pressurized (lamination processing) by the thermal fixing roller pair 120 of the thermal fixing section 50.

[0135] In this way, the insert P with the image formed and the sheet S are conveyed to the lamination processing apparatus 200a for lamination processing.

[0136] The image forming system 3001 of this embodiment has the structure described above. Therefore, firstly, the sheet S loaded in the first paper feed cassette 160 of the image forming apparatus 300 is transported to the lamination processing apparatus 200a via the paper transport path 164, and the sheet S is peeled into two sheets at the sheet peeling section 1. Then, during the sheet peeling process of the lamination processing apparatus 200a, the insert P loaded in the second paper feed cassette 162 is transported to the lamination processing apparatus 200a after an image is formed on the insert P via the paper transport path 164, the secondary transfer device 174, the fixing device 176, and the first paper output device 178. Then, the insert P with the image formed can also be inserted between the two peeled sheets for lamination processing.

[0137] Next, a modified example of an image forming system having the sheet processing apparatus and image forming apparatus according to the present invention will be described.

[0138] Figure 26 The diagram shown is an overall configuration of a modified image forming system incorporating the lamination processing apparatus and image forming apparatus according to the present invention. This image forming system 4001 and... Figure 25 The difference between the image forming apparatus 300 shown is that the image forming apparatus 400 includes a second paper feeding device 122 and a paper feeding tray 123.

[0139] Without performing lamination, the image forming apparatus 400 forms an image on the insert P supplied from the second paper feed cassette 162, and then discharges the image-formed insert P directly to the paper discharge tray 123 via a second paper discharge device 122 consisting of a pair of paper discharge rollers. Therefore, without performing lamination, the image forming apparatus 400 does not need to reduce the output speed of image forming, and can maintain the productivity of the image forming apparatus 400.

[0140] Alternatively, the image forming apparatus 400 may be configured to detachably include the lamination processing device 200a in its paper discharge section. That is, when lamination processing is not required, the lamination processing device 200a may be removed from the image forming apparatus 400.

[0141] Alternatively, a paper feed tray 103 for loading insert P and a pickup roller 106 for supplying insert P from the paper feed tray 103 can be installed in the removed laminating processing apparatus 200a, thereby enabling it to function as a... Figure 24 The same lamination processing device 200 is used as a single unit.

[0142] Figure 25 The image forming system 3001 shown and Figure 26 The image forming system 4001 shown can also be configured such that a sheet processing device 100 is provided in its paper discharge section instead of a lamination processing device 200a. Additionally, in Figure 26 In the image forming system 4001 shown, the sheet processing device 100 may also be detachable.

[0143] also, Figure 25 The image forming system 3001 shown and Figure 26 The image forming system 4001 shown may further be configured as a post-processing device having a high-capacity paper output device (stacker) and / or binding device, etc.

[0144] It should also be noted that, as Figure 25 and Figure 26 As shown, when the sheet S loaded in the first paper feed cassette 160 of the image forming apparatus 300 and 400 passes between the fixing devices 176, the sheet S will not be bonded at the fixing temperature; it will only be bonded by applying heat higher than the fixing temperature. Furthermore, the image forming apparatus 300 and 400 use an electrophotographic method to form images on the insert P, but are not limited to this; known image forming methods such as inkjet printing and stencil printing can also be used.

[0145] Figure 27 , 28 The diagram shows an overall configuration of an image forming system having the lamination processing apparatus according to the present invention externally mounted on the image forming apparatus. Additionally, in Figure 27 , 28 In the middle, to and Figure 25 , 26 Identical components are given the same symbols, and their detailed descriptions are omitted.

[0146] like Figure 27 As shown, the image forming system 5001 has a lamination processing device 200b outside the image forming apparatus 500, which is consistent with... Figure 25Image forming system 3001 Figure 26 The image forming system 4001 is different.

[0147] The lamination processing apparatus 200b has a sheet tray 102 for stacking sheets S, and is configured to feed insert P from the image forming apparatus 500 via a relay transport device R. Therefore, it can automatically perform all image forming processes performed on insert P by a copier or printer (image forming apparatus 500), sheet peeling processes, insertion processes of insert P with images formed into the peeled sheet S, and lamination processes of the sheet S with inserted insert P with images formed.

[0148] Figure 28 The image forming system 5002 shown is configured such that other post-processing devices 250 (e.g., high-capacity paper output devices (stackers) and / or binding devices, etc.) are provided further downstream of the lamination processing apparatus 200b. Depending on the user's requirements, lamination processing operations and non-lamination processing operations can be performed in parallel, improving operational efficiency.

[0149] Figure 29 The diagram shows the hardware configuration for performing control processes within the lamination processing apparatus 200. For example... Figure 29 As shown, the lamination processing apparatus 200 has a configuration that connects a CPU (Central Processing Unit) 901, RAM (Random Access Memory) 902, ROM (Read Only Memory) 903, HDD (Hard Disk Drive) 904 and I / F 905.

[0150] CPU 901 is the computing unit that controls the overall operation of the lamination processing device 200. RAM 902 is a volatile storage medium capable of high-speed reading and writing of information, and serves as the working area for CPU 901 when processing information. ROM 903 is a dedicated non-volatile storage medium for reading, storing programs such as firmware. HDD 904 is a non-volatile storage medium with a large capacity capable of reading and writing information, and stores the OS (operating system), various control programs, application programs, etc.

[0151] The lamination processing apparatus 200 uses the computing capabilities of the CPU 901 to process information processing programs (application programs) loaded from the control program stored in the ROM 903 into the RAM 902. This processing constitutes a software control unit that includes various functional modules of the lamination processing apparatus 200. The combination of this software control unit and the hardware resources mounted on the lamination processing apparatus 200 forms functional modules that implement the functions of the lamination processing apparatus 200. Specifically, the CPU 901, RAM 902, ROM 903, and HDD 904 constitute the control unit 127 that controls the operation of the lamination processing apparatus 200.

[0152] I / F905 is an interface connecting the pickup roller motors 105a and 106a, the conveyor roller pair motor 107a, the inlet roller pair motor 108a, the outlet roller pair motor 113a, the discharge roller pair motor 121a, the winding roller motor 109a, the gripping mechanism motor 110a, the peeling component motor 36 (46), the branching component motor 118a, the thermal fixing roller motor 129a, the heater 54, and the cam drive motor 195 to the control unit 127. Additionally, I / F905 is an interface connecting the size detection sensors C6 and C7, the conveyor sensors C1-3 and C5, the abnormal state detection sensor C4, the first thermistor 56a, the second thermistor 56b, and the operation panel 10 to the control unit 127.

[0153] Additionally, the control unit 127 controls the operation of the pickup roller motors 105a and 106a, the conveyor roller pair motor 107a, the inlet roller pair motor 108a, the outlet roller pair motor 113a, the discharge roller pair motor 121a, the winding roller motor 109a, the gripping mechanism motor 110a, the peeling component motor 36 (46), the branching component motor 118a, the thermal fixing roller motor 129a, the heater 54, and the cam drive motor 195 via I / F905. Furthermore, the control unit 127 acquires detection results from the size detection sensors C6 and C7, the conveyor sensors C1-3 and C5, the abnormal state detection sensor C4, the first thermistor 56a, and the second thermistor 56b.

[0154] Additionally, the winding roller motor 109a is a drive mechanism for rotating the winding roller 109 in both forward and reverse directions. The gripping mechanism motor 110a is a drive mechanism for rotating the gripping mechanism 110. The peeling member motor 36 (46) is a drive mechanism for moving the peeling member 116 in the width direction of the sheet S. The branching member motor 118a is a drive mechanism for switching the position of the branching member 118.

[0155] Figure 30 This means that in Figure 25 The image forming system 3001 shown is illustrated in the flowchart, which describes a series of actions from the feeding and peeling of the sheet S, to the insertion of an insert P with an image formed on it into the peeled sheet S, and then to the completion of the lamination process on the sheet S with the insert P inserted. Figure 30 The flowchart is shown, and the corresponding figure numbers are explained. Additionally, although the following only pertains to... Figure 25 The lamination process in the image forming system 3001 shown will be explained, but because Figures 26-28 The lamination process of the other image forming systems 4001, 5001, and 5002 shown is the same, so detailed descriptions are omitted.

[0156] First, in step S01, the image forming system 3001 determines whether the user has selected the multi-page insertion mode. If the multi-page insertion mode is selected, the number of pages to be inserted is selected in step S02. This can be set, for example, using the operation panel 10.

[0157] On the other hand, if the multi-page insertion mode is not selected, the process proceeds to step S03, and the image forming system 3001 determines that the single-page insertion mode has been selected.

[0158] Next, in step S11, the lamination processing apparatus 200a begins feeding the sheet S (see reference). Figure 1 Next, in step S12, it is determined whether the front end of the sheet S has reached the conveying sensor C3 (refer to...). Figure 2 In step S13, when the lamination processing apparatus 200a determines that the sheet S has been conveyed a specified amount from the conveying sensor C3, the conveying is temporarily stopped (see reference). Figure 3 Next, in step S14, while opening the gripping mechanism 110, in step S15, the material is conveyed in the reverse direction ( Figure 4 (Arrow B direction) conveys sheet S (refer to) Figure 4 ).

[0159] In step S16, when the lamination processing apparatus 200a determines that the sheet S has been fed a specified amount, the feeding of the sheet S is temporarily stopped in step S17. Then, in step S18, the gripping mechanism 110 is closed and the end of the sheet S is gripped (see reference). Figure 5 ).

[0160] Next, in step S19, the lamination processing apparatus 200a rotates the winding roller 109 counterclockwise and winds the sheet S onto the winding roller 109 (see reference). Figure 6 Next, in step S20, it is determined whether the front end of the sheet S has reached the conveying sensor C5. In step S21, when the laminating processing apparatus 200a determines that the sheet S has been conveyed from the conveying sensor C5 by a specified amount, in step S22, the abnormal state detection sensor C4 is used to detect the state of the sheet S.

[0161] The abnormal state detection sensor C4 is an abnormality detection mechanism that detects whether the size of the space g (the amount of deflection of one side of the two sheets) generated between the two sheets of sheet S exceeds a predetermined threshold. In step S23, if the laminating processing apparatus 200a determines that the state of sheet S is normal (the size of the space g is above the predetermined threshold) based on the detection result of the abnormal state detection sensor C4, it proceeds to step S24a.

[0162] On the other hand, in step S23, when it is determined that the state of sheet S is abnormal (the size of the space is below the specified threshold), the process proceeds to step S24b, and the lamination processing apparatus 200a detects the abnormality and stops the sheet processing.

[0163] When transitioning to step S24a, the laminating apparatus 200a moves the sheet S in the direction opposite to the winding direction. Figure 2 The material is conveyed in the direction of arrow A, and the joint r is conveyed further downstream of the clamping part of the exit roller pair 113. As a result, a space g between the two sheets of sheet S can be formed at a position corresponding to the insertion position of the peeling member 116.

[0164] Next, proceeding to step S24c, the lamination processing apparatus 200a inserts the peeling member 116 from both sides of the sheet S into the resulting space g (see reference). Figure 7 , Figure 20 Next, in step S25, with the peeling member 116 inserted from both sides of the sheet S, the laminating apparatus 200 rotates the winding roller 109 clockwise and moves the sheet S in the forward conveying direction. Figure 2 (In the direction of arrow A) convey.

[0165] Next, in step S26, it is determined whether the front end of the sheet S has reached the conveying sensor C5. In step S21, when the laminating processing apparatus 200 determines that the sheet S has been conveyed from the conveying sensor C5 by a specified amount, in step S28, the gripping mechanism 110 is made to open.

[0166] Next, in step S29, after the laminating apparatus 200a has conveyed a specified amount of sheet S, it temporarily stops conveying sheet S. Then, in step S30, the peeling member 116 is moved further in the sheet width direction (see reference). Figure 8 , Figure 22 This causes the rear ends of the two sheets of sheet S to be separated, one above the other.

[0167] In step S31, the lamination processing apparatus 200a moves the sheet S in the reverse conveying direction ( Figure 9 (In the direction of arrow B). Next, in step S32, it is determined whether the leading edge of the sheet S has reached the conveying sensor C5. In step S33, when the laminating processing apparatus 200a determines that the sheet S has been conveyed a specified amount from the conveying sensor C5, the conveying is temporarily stopped in step S34 (refer to...). Figure 9 Thus, the peeling of sheet S was completed.

[0168] Next, in step S35, the lamination processing apparatus 200a determines whether to perform image formation (inline) on the insert P of the inserted sheet S. If inline, the process proceeds to step S36, where the lamination processing apparatus 200a causes the image forming apparatus 300 (400, 500) to start a printing operation and form an image on the insert P. Then, the process proceeds to step S37.

[0169] On the other hand, in step S35, if the system is not online, the process proceeds to step S37.

[0170] In step S37, the lamination processing apparatus 200a moves along the forward conveying direction ( Figure 10 (In the direction of arrow A) the insert P is fed and inserted into the open sheet S. Here, in single-page insertion mode, it is the same as before. Figures 10-12 The action shown, in multi-page insertion mode, is the same as the one described above. Figures 13-16 The actions shown.

[0171] Next, in step S38, the laminating apparatus 200a determines whether the selected number of inserts P has been inserted into the sheet S. If inserted, the process proceeds to step S39.

[0172] Next, in step S39, the branch component 118 switches the path. In step S39, the sheet S holding the insert P is conveyed to the thermal fixing unit 50 (step S40), and lamination is completed by applying heat and pressure (see reference). Figure 17 ).

[0173] Additionally, in the case of inline processing (when "Yes" is selected in step S35), the image forming apparatus 300 is notified to start the printing job immediately after the sheet is peeled off, and the printing and transport of the insert P are performed. At this time, the printed insert P is transported, and the sheet processing device remains in a waiting state until it reaches the transport sensor C1. Therefore, considering the transport time of the printed insert P, for example, it is also possible to... Figure 7 After the peeling unit 116 completes its operation, it notifies the image forming apparatus to begin printing. This improves productivity.

[0174] The following describes the features and configuration of the present invention.

[0175] Figure 31The diagram shown is a configuration diagram of one embodiment of the thermal fixing unit 50 of the lamination processing apparatus 200 (200a, 200b) according to the present invention. The thermal fixing unit 50, which heats and pressurizes the sheet S (hereinafter referred to as "sheet SP") holding the insert P, includes a pair of thermal fixing rollers 120 (first thermal fixing roller 120a, second thermal fixing roller 120b) for conveying the sheet SP, heaters 54 (first heater 54a, second heater 54b) serving as heating mechanisms for heating the pair of thermal fixing rollers 120 respectively, and thermal fixing roller motors 129a (see reference 129a) for driving the pair of thermal fixing rollers 120 respectively. Figure 29 Furthermore, it also includes thermistors 56 (first thermistor 56a, second thermistor 56b) as contact temperature detection mechanisms for respectively detecting the surface temperature of the thermal fixing roller pair 120.

[0176] The first heater 54a and the second heater 54b are respectively disposed inside the mandrel portions 60a and 60b, inside the first and second thermal fixing rollers 120a and 120b. Furthermore, the first thermistor 56a and the second thermistor 56b are in contact with the surfaces of the first and second thermal fixing rollers 120a and 120b, respectively. In this embodiment, the thermal fixing unit 50 controls the corresponding first heater 54a and second heater 54b based on the detected temperatures of the first thermistor 56a and the second thermistor 56b.

[0177] like Figure 32 As shown, the first thermal fixing roller 120a and the second thermal fixing roller 120b are respectively composed of spindle portions 60a and 60b located at the center, elastic layers 62a and 62b (rubber layers) disposed around the spindle portions 60a and 60b, and fluoropolymer layers 64a and 64b disposed on the surfaces of the elastic layers 62a and 62b. Clamping portions N are formed by the extrusion deformation of the elastic layers 62a and 62b (rubber layers). The fluoropolymer layers 64a and 64b located on the surfaces of the elastic layers 62a and 62b prevent paste leaking from the sheet SP from adhering to the roller surface.

[0178] Since the first thermal fixing roller 120a and the second thermal fixing roller 120b in the thermal fixing unit 50 of this embodiment have the same material, the same diameter, the same hardness, and the same surface release properties, the paste overflowing from the sheet SP can be dispersed to both the first thermal fixing roller 120a and the second thermal fixing roller 120b, preventing it from accumulating only on one side of the first thermal fixing roller 120a and the second thermal fixing roller 120b. This prevents the sheet SP from sticking to either the first thermal fixing roller 120a or the second thermal fixing roller 120b, and also reduces the time spent passing paper through the sheet each time it is cleaned.

[0179] Furthermore, since the heat fixing rollers 120 are heated from the inside, there is no need to worry about damage to the fluoropolymer layers 64a and 64b located on the surface. In addition, since the mandrel portions 60a and 60b and the elastic layers 62a and 62b can store heat, even if heat is taken from the surface layer through contact with the sheet SP, the drop in surface temperature can be reduced.

[0180] Furthermore, the first thermistor 56a and the second thermistor 56b are disposed on the respective surfaces of the first thermal fixing roller 120a and the second thermal fixing roller 120b, and together with the first heater 54a and the second heater 54b, are used to control the first thermal fixing roller 120a and the second thermal fixing roller 120b at a target temperature. By detecting the respective temperatures of the first thermal fixing roller 120a and the second thermal fixing roller 120b, the first thermal fixing roller 120a and the second thermal fixing roller 120b can be controlled to approximately the same temperature, enabling heating of both sides of the sheet SP at approximately the same temperature. Alternatively, a non-contact temperature sensor can be used instead of the first thermistor 56a and the second thermistor 56b.

[0181] Therefore, by using the heat fixing roller 120, the sheet SP can be heated and pressed evenly from both sides, thus obtaining a stable laminate with less curling and thus improving the pressing quality.

[0182] Here, we explain the effect of the paste adhering to the thermal fixing roller 120 on the temperature detection mechanism (thermometer 56).

[0183] Figure 33 The diagram shows a state in which the thermistor 56 is lifted due to the paste accumulating on the surface of the thermal fixing roller pair 120.

[0184] For example, during the lamination process, paste overflowing from the rear end of sheet SP may adhere to and accumulate on the surface of the first thermal fixing roller 120a. Furthermore, using continuous paper feed of sheet SP or a laminated sheet (sheet S) with a large amount of paste will promote paste accumulation. When the accumulated paste 66 becomes large, the thermistor 56 will float off the surface of the first thermal fixing roller 120a, thus failing to detect the correct surface temperature.

[0185] The first heater 54a and the second heater 54b perform temperature control (feedback control) based on the surface temperatures of the first thermal fixing roller 120a and the second thermal fixing roller 120b detected by their respective thermistors 56 (first thermistor 56a and second thermistor 56b). Therefore, if the thermistor 56 cannot detect the correct surface temperature, the temperature of the first heater 54a and the second heater 54b cannot be properly controlled, and the lamination quality may be reduced.

[0186] Even if the first heater 54a and the second heater 54b are further heated, if the detected surface temperatures of the first thermal fixing roller 120a and the second thermal fixing roller 120b are still low, it is possible that further heating of the first heater 54a and the second heater 54b may cause an excessive rise in surface temperatures, which may lead to smoke and fire.

[0187] In contrast, the thermal fixing roller pair 120 of this embodiment has a characteristic configuration (see reference). Figure 31 and Figure 32 The paste is difficult to accumulate on the thermal fixing roller pair 120, and the thermistor 56 is in contact with the surface of the thermal fixing roller pair 120 to detect the correct surface temperature. Therefore, the correct temperature control of the heater 54 can be performed.

[0188] Next, the advantageous components will be explained.

[0189] (Composition of the thermal fixing roller 120)

[0190] The combined thickness of the elastic layers 62a and 62b and the fluororesin layers 64a and 64b of each of the thermal fixing rollers 120 is preferably 3 mm or less. A predetermined time difference (waste time) occurs between the heat from the heater 54 reaching the surface layer of the thermal fixing rollers 120 and the temperature being detected by the thermistor 56. However, by making the thickness such that the time difference can be reduced, high-precision temperature control can be achieved.

[0191] (The configuration of the first and second conveyor roller pairs 134 and 136)

[0192] Figure 34 The diagram shows the configuration of a thermal fixing unit and first and second transport roller pairs 134 and 136 according to one embodiment of the present invention. The lamination processing apparatus 200 (200a, 200b) has a first transport roller pair 134 disposed upstream of the thermal fixing unit 50 and clamping and transporting sheet SP toward the thermal fixing unit 50, and a second transport roller pair 136 disposed downstream of the thermal fixing unit 50 and clamping and discharging sheet SP to the outside of the apparatus.

[0193] Here, the clamping portion N2 of the thermal fixing roller pair 120 is located on a straight line connecting the clamping portion N1 of the first conveying roller pair 134 and the clamping portion N3 of the second conveying roller pair 136.

[0194] like Figure 35 As shown in (a), the sheet SP is conveyed to the thermal fixing section 50 (thermal fixing roller pair 120) by the first conveyor roller pair 134. At this time, although the sheet SP reaches the clamping part N2 of the thermal fixing roller pair 120, the remaining part is still conveyed by the first conveyor roller pair 134. That is, the sheet SP is conveyed by both the first conveyor roller pair 134 and the thermal fixing roller pair 120.

[0195] Here, when the sheet conveying speed (linear speed: V1) of the first conveying roller pair 134 is slower than the sheet conveying speed (linear speed: V2) of the heat fixing roller pair 120 (V1 < V2), the heat fixing roller pair 120 pulls the sheet SP from the first conveying roller pair 134. At this time, during heat fixing, since the conveying speed of the insert P changes relative to the conveying speed of the sheet S, quality defects such as uneven adhesion may occur.

[0196] Therefore, it is preferable that the sheet conveying speed (V1) of the first conveying roller pair 134 is faster than the sheet conveying speed (V2) of the heat fixing roller pair 120 (V1 > V2), and the sheet SP is not pulled by the heat fixing roller pair 120. Thus, during heat fixing, the conveying speed of the sheet SP does not change, and stable lamination quality can be obtained.

[0197] Instead, it is also possible to make the conveying force (F2) of the heat fixing roller pair 120 greater than the conveying force (F1) of the first conveying roller pair 134 (F1 < F2) so that the sheet SP slips relative to the first conveying roller pair 134. In this case, it is also possible to keep the conveying speed of the sheet SP constant during heat fixing.

[0198] The conveying force (F1) of the first conveying roller pair 134 is the force generated between the clamping portion N1 of the first conveying roller pair 134 and the sheet SP, and the conveying force (F2) of the heat fixing roller pair 120 is the force generated between the clamping portion N2 of the heat fixing roller pair 120 and the sheet SP.

[0199] The conveying force (F1) is determined by the contact area between the clamping portion N1 of the first conveying roller pair 134 and the sheet SP, the mutual dynamic friction coefficient in the contact surface, and the pressing force between the rollers of the first conveying roller pair 134. The same applies to the conveying force (F2). [[ID=1,6]]

[0200] Next, as shown in (b) of Figure 35 the sheet SP fixed by the heat fixing roller pair 120 is conveyed toward the second conveying roller pair 136. Even when the sheet SP reaches the clamping portion N3 of the second conveying roller pair 136, since the remaining part is still being conveyed by the heat fixing roller pair 120, it is conveyed by both the heat fixing roller pair 120 and the second conveying roller pair 136.

[0201] Here, for the conveying of the sheet SP between the heat fixing roller pair 120 and the second conveying roller pair 136, it is preferable that while the second conveying roller pair 136 pulls the sheet SP from the heat fixing roller pair 120, the conveying speed of the sheet SP is made the same as or approximately the same as the conveying speed of the heat fixing roller pair 120.

[0202] This is because by pulling the sheet SP to the second conveyor roller 136, curling can be suppressed. In addition, the sheet SP can be heat-fixed according to the conveying speed of the heat fixing roller 120.

[0203] Therefore, the sheet conveying speed (linear speed: V3) of the second conveying roller pair 136 is made faster than the sheet conveying speed (linear speed: V2) of the thermal fixing roller pair 120 (V3>V2), and the conveying force (F3) of the second conveying roller pair 136 is the size of the sheet SP conveyed by the thermal fixing roller pair 120 while sliding and conveying.

[0204] Therefore, during heat fixing, the sheet SP is held and conveyed by the heat fixing roller pair 120 and the second conveying roller pair 136, but its conveying can actually be controlled by the heat fixing roller pair 120. Thus, heat fixing can be performed simultaneously with the linear conveying of the sheet SP and the conveying speed corresponding to the heat fixing roller pair 120.

[0205] (Contact separation mechanism of thermal fixing roller to 120)

[0206] Figure 36 The diagram shown is a schematic representation of a thermal fixing roller pair 120 capable of changing the inter-center distance according to one embodiment of the present invention. Figure 36 Image (a) shows the state in which the first thermal fixing roller 120a and the second thermal fixing roller 120b are in contact. Figure 36 Figure (b) shows the state where the first thermal fixing roller 120a and the second thermal fixing roller 120b are separated. In addition, Figure 37 shows the moving mechanism that causes the thermal fixing rollers 120 to come into contact and separate.

[0207] Figure 37(a) shows the contact state of the thermal fixing roller pair 120, and Figure 37(b) shows the separation state of the thermal fixing roller pair 120. The moving mechanism 190 that causes the thermal fixing roller pair 120 to contact and separate includes a movable bracket 191, a movable bracket drive cam 193, and a force-applying spring 194 as a force-applying component. The first thermal fixing roller 120a (left side in the figure) on one side of the thermal fixing roller pair 120 is fixed, and the second thermal fixing roller 120b (right side in the figure) on the other side of the thermal fixing roller pair 120 is rotatably supported on one end of the movable bracket 120 via a shaft 191c. The movable bracket 191 has a curved shape, and the shaft 120c of the second thermal fixing roller 120b of the thermal fixing roller pair 120 is fixed to one end of it. In addition, the movable bracket 191 is configured to rotate about the movable bracket rotation fulcrum 191a. Furthermore, as shown in Figure 37(a), the movable bracket 191 is subjected to force by the force-applying spring 194 in a counterclockwise direction around the movable bracket rotation fulcrum 120a, so that the first thermal fixing roller 120a and the second thermal fixing roller 191b constituting the thermal fixing roller pair 120 are in an abutting state. The movable bracket drive cam 193 is configured to rotate via the cam drive motor 195. Then, when the movable bracket drive cam 193 rotates to the position shown in Figure 37(b), the movable bracket 191, which is subjected to force by the movable bracket drive cam 193, rotates clockwise around the movable bracket rotation fulcrum 191a in opposition to the force of the force-applying spring 194. As a result, the second thermal fixing roller 120b on the movable side separates from the first thermal fixing roller 120a on the fixed side, and the thermal fixing roller pair 120 is in a separated state.

[0208] As described above, the distance between the rotation centers of the thermal fixing rollers 120 can be changed by the moving mechanism 190, thereby changing the clamping pressure.

[0209] exist Figure 36 In this configuration, the second thermal fixing roller 120b, the second heater 54b, and the second thermistor 56b on one side are moved together. However, if the amount of movement is small, it can also be configured so that only the second thermal fixing roller 120b moves. Alternatively, the first thermal fixing roller 120a, the first heater 54a, and the first thermistor 56a can also move together.

[0210] Furthermore, the distance between the rotation centers of the thermal fixing roller pair 120 can be changed according to user instructions. For example, instructions can be sent to the lamination processing apparatus 200 (200a, 200b) using the operation panel 10. As a result, the user can easily handle paper jams, for example, in cases where sheet SP is blocked (paper jam) in the thermal fixing roller pair 120.

[0211] The present invention has been described in detail above through embodiments. These embodiments are merely examples, and various modifications can be made without departing from the spirit of the invention.

[0212] Furthermore, the effects described in the embodiments of the present invention are merely examples of the best effects produced by the present invention, and the effects of the present invention are not limited to those described in the embodiments of the present invention.

[0213] The present invention can be described, for example, as follows.

[0214] (Method 1)

[0215] A lamination processing apparatus is characterized by comprising a heat fixing unit that simultaneously conveys, heats, and pressurizes two overlapping sheets holding a sheet-like medium. The heat fixing unit includes: a pair of heat fixing rollers for conveying the two overlapping sheets; a heating mechanism for heating the pair of heat fixing rollers respectively; a temperature detection mechanism for detecting the temperature of the pair of heat fixing rollers respectively; and a driving mechanism for driving the pair of heat fixing rollers. The pair of heat fixing rollers is composed of a core portion located at the center, an elastic layer disposed around the core portion, and a fluoropolymer layer disposed on the surface of the elastic layer. The pair of heat fixing rollers has the same diameter and the same hardness, and has the same surface release properties.

[0216] (Method 2)

[0217] The lamination apparatus according to method 1 is characterized in that: the heating mechanism is respectively disposed on the inner side of the mandrel of the thermal fixing roller pair, and the temperature detection mechanism is a contact temperature detection mechanism that is in contact with the surface of the thermal fixing roller pair.

[0218] (Method 3)

[0219] The lamination apparatus according to method 1 or method 2 is characterized in that the total thickness of the elastic layer and the fluororesin layer of each of the thermal fixing roller pairs is less than 3 mm.

[0220] (Method 4)

[0221] The lamination apparatus according to any one of methods 1 to 3 is characterized by comprising: a first pair of conveying rollers disposed upstream of the heat fixing section and clamping the two overlapping sheets and conveying them to the heat fixing section; and a second pair of conveying rollers disposed downstream of the heat fixing section and clamping the two overlapping sheets outside the apparatus and discharging them to the outside of the lamination apparatus, wherein the clamping portion of the heat fixing rollers is located on a straight line connecting the clamping portion of the first pair of conveying rollers and the clamping portion of the second pair of conveying rollers.

[0222] (Method 5)

[0223] According to the lamination processing apparatus of method 4, the linear speed of the second conveying roller pair is faster than the linear speed of the thermal fixing roller pair, and the conveying force of the second conveying roller pair is such that the two overlapping sheets conveyed by the thermal fixing roller pair slide and are conveyed at the same time.

[0224] (Method 6)

[0225] The lamination processing apparatus according to any one of methods 1 to 5 is characterized in that: each of the heating mechanisms is controlled according to the detected temperature of each of the temperature detection mechanisms.

[0226] (Method 7)

[0227] The lamination apparatus according to any one of methods 1 to 6 is characterized in that: the thermal fixing rollers are capable of changing the distance between their rotation centers.

[0228] (Method 8)

[0229] The lamination processing apparatus according to any one of methods 1 to 7 is characterized in that: the change of the distance between the rotation centers of the thermal fixing roller pair can be implemented by user instructions.

[0230] (Method 9)

[0231] An image forming system is characterized by comprising: an image forming apparatus for forming an image on a sheet medium, and a lamination processing apparatus according to any one of methods 1 to 8.

Claims

1. A lamination processing apparatus, characterized in that... It features a thermal fixing unit that simultaneously conveys two overlapping sheets holding a sheet-like medium while heating and pressurizing them. The thermal fixing section includes: The thermal fixing roller pair that conveys the two overlapping sheets includes a first thermal fixing roller and a second thermal fixing roller. A first heating mechanism and a second heating mechanism respectively heat the first thermal fixing roller and the second thermal fixing roller; A first temperature detection mechanism and a second temperature detection mechanism respectively detect the temperatures of the first thermal fixing roller and the second thermal fixing roller, and A drive mechanism that drives the first and second thermal fixing rollers. The first and second thermal fixing rollers each consist of a mandrel portion located at the center, an elastic layer disposed around the mandrel portion, and a fluoropolymer layer disposed on the surface of the elastic layer. The lamination processing apparatus further includes a moving mechanism, the moving mechanism comprising: Movable bracket; A movable bracket drive cam that applies force to the movable bracket; and A force-applying spring, wherein the force applied by the force-applying spring cancels out the force applied by the cam driven by the movable bracket; The second thermal fixing roller is rotatably supported by a shaft at one end of the movable bracket, and The drive mechanism is also configured to control the moving mechanism to change the distance between the first rotation center of the first thermal fixing roller and the second rotation center of the second thermal fixing roller to change the clamping pressure between the first thermal fixing roller and the second thermal fixing roller.

2. The lamination processing apparatus according to claim 1, characterized in that: The first and second thermal fixing rollers have the same diameter, hardness, and surface release properties.

3. The lamination processing apparatus according to claim 1, characterized in that: The first heating mechanism and the second heating mechanism are respectively disposed inside the spindle portion of the first thermal fixing roller and the second thermal fixing roller. The temperature detection mechanism is a contact temperature detection mechanism that contacts the surfaces of the thermal fixing rollers.

4. The lamination processing apparatus according to claim 1, characterized in that: The total thickness of the elastic layer and the fluoropolymer layer of each of the thermal fixing roller pairs is less than 3 mm.

5. The lamination processing apparatus according to claim 1, characterized in that... include: A first pair of conveying rollers, positioned upstream of the heat fixing section, clamps and conveys the two overlapping sheets toward the heat fixing section. A second pair of conveying rollers, positioned downstream of the heat fixing section, clamps the two overlapping sheets outside the apparatus and discharges them to the outside of the laminating process unit. The clamping portion of the thermal fixing roller pair is located on a straight line connecting the clamping portion of the first conveying roller pair and the clamping portion of the second conveying roller pair.

6. The lamination processing apparatus according to claim 5, characterized in that: The linear velocity of the second conveyor roller pair is faster than that of the thermal fixing roller pair. The conveying force of the second conveying roller pair is such that the two overlapping sheets conveyed by the thermal fixing roller pair slide and are conveyed at the same time.

7. The lamination processing apparatus according to claim 1, characterized in that: Each heating mechanism is controlled according to the temperature detected by each of the temperature detection mechanisms.

8. The lamination processing apparatus according to claim 1, characterized in that: The thermal fixing rollers can change the distance between their rotation centers; The first temperature detection mechanism is located adjacent to the first thermal fixing roller to detect the first surface temperature of the first surface of the first thermal fixing roller; and The second temperature detection mechanism is located adjacent to the second thermal fixing roller to detect the second surface temperature of the second surface of the second thermal fixing roller.

9. The lamination processing apparatus according to claim 8, characterized in that: The drive mechanism is also configured to: The first heating mechanism is controlled according to the first surface temperature detected by the first temperature detection mechanism; and The second heating mechanism is controlled based on the second surface temperature detected by the second temperature detection mechanism.

10. The lamination processing apparatus according to claim 1, characterized in that: The distance between the rotation centers of the thermal fixing roller pair can be changed via user commands.

11. The lamination processing apparatus according to claim 1, characterized in that: The drive mechanism is also configured to change the distance in response to a paper jam between the first thermal fixing roller and the second thermal fixing roller.

12. The lamination processing apparatus according to claim 1, characterized in that: At least one of the first temperature detection mechanism and the second temperature detection mechanism moves together with at least one corresponding of the first thermal fixing roller or the second thermal fixing roller.

13. An image forming system, characterized in that... include: An image forming apparatus for forming an image on a sheet-like medium, and The lamination processing apparatus according to any one of claims 1 to 12.

Images