Sheet peeling apparatus, laminating apparatus, image forming apparatus, and image forming system

Abstract

The present invention relates to a sheet peeling apparatus capable of peeling two sheets of which the sheets are overlapped, a laminating apparatus, an image forming apparatus, and an image forming system. In the sheet peeling apparatus (1), a sheet peeling section (19) is provided to peel a non-joining portion of an overlapped sheet (PJ) of which two sheets (P1, P2) are overlapped and joined at a joining portion (A). Further, in the sheet peeling apparatus (1), a bending conveyance section (36) (conveyance mechanism) is provided to convey the overlapped sheet (PJ) to the sheet peeling section (19) while bending the overlapped sheet (PJ) in a direction intersecting a conveyance direction.

Description

TECHNICAL FIELD

[0001] The present application relates to a sheet peeling apparatus which peels overlapping sheets which are overlapped with two sheets and joined at a joining portion, a laminating processing apparatus having the sheet peeling apparatus, an image forming apparatus such as a copying machine, a printer, a facsimile machine, a multifunction peripheral, or a printing machine, and an image forming system. BACKGROUND

[0002] Conventionally, a sheet peeling apparatus which peels overlapping sheets which are overlapped with two sheets and joined at a joining portion is known (for example, refer to Patent Literature 1).

[0003] In detail, the sheet peeling apparatus in Patent Literature 1 peels two sheets in a laminated sheet (overlapping sheet) which is joined on one side by a sheet peeling portion composed of a winding roller or the like, and inserts an interleaf (intermediate sheet) therebetween.

[0004] The conventional sheet peeling apparatus cannot sufficiently peel two sheets when the two sheets which constitute the overlapping sheet are electrostatically adhered to each other with a strong force, or the like.

[0005] The present application has been achieved in order to solve the above problems, and has an object to provide a sheet peeling apparatus, a laminating processing apparatus, an image forming apparatus, and an image forming system which can well peel two sheets which constitute an overlapping sheet.

[0006] Patent Literature 1: Japanese Patent Application Laid-Open No. 2002-121868 SUMMARY

[0007] The sheet peeling apparatus according to the present application includes a sheet peeling portion which peels a non-joining portion of overlapping sheets which are overlapped with two sheets and joined at a joining portion, and a conveying mechanism which conveys the overlapping sheets while bending the overlapping sheets in a direction intersecting a conveying direction to the sheet peeling portion.

[0008] According to the present application, it is possible to provide a sheet peeling apparatus, a laminating processing apparatus, an image forming apparatus, and an image forming system which can well peel two sheets which constitute an overlapping sheet. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 (A) is a side view showing a state in which the holding member is moved to a holding position, and (B) is a side view showing a state in which the holding member is moved to a retreat position.

[0010] Figure 2 (A) is a side view showing a state in which the holding member is moved to a holding position, and (B) is a side view showing a state in which the holding member is moved to a retreat position.

[0011] Figure 3(A) shows a perspective view of a state in which the holding member is moved to the holding position, and (B) shows a perspective view of a state in which the holding member is moved to the retreat position.

[0012] Figure 4 (A) to (D) of FIG. 8 show action diagrams of the sheet peeling device.

[0013] Figure 5 (A) to (D) of FIG. 9 show action diagrams of the sheet peeling device. Figure 4

[0014] Figure 6 (A) to (C) of FIG. 10 show action diagrams of the sheet peeling device. Figure 5

[0015] (A) to (C) of FIG. 11 show action diagrams of the sheet peeling device. Figure 7 Figure 6 (A) to (C) of FIG. 12 show action diagrams of the sheet peeling device.

[0016] Figure 8 Figure 7 (A) to (C) of FIG. 13 show action diagrams of the sheet peeling device.

[0017] Figure 9 (A) to (C) of FIG. 14 show action diagrams of the sheet peeling device.

[0018] Figure 10 (A) to (C) of FIG. 15 show perspective views of actions of the peeling claw seen from the width direction.

[0019] Figure 11 (A) and (B) of FIG. 16 show configuration diagrams of a drive mechanism of the peeling claw.

[0020] Figure 12 (A) to (C) of FIG. 17 show flowcharts of controls performed by the sheet peeling device.

[0021] Figure 13 (A) to (C) of FIG. 18 show schematic diagrams of the curved conveyance section.

[0022] Figure 14 (A) and (B) of FIG. 19 show diagrams indicating the curved conveyance section and the overlapping sheets along the width direction.

[0023] Figure 15 (A) and (B) of FIG. 20 show diagrams of the curved conveyance section as a modification example 1.

[0024] Figure 16 (A) and (B) of FIG. 21 show diagrams of the curved conveyance section as a modification example 2.

[0025] Figure 17 ​​​(A), (B) shown in FIG. 21 are schematic diagrams of an image forming system according to a modification example 6.

[0026] Figure 18 (A), (B) shown in FIG. 21 are schematic diagrams of an image forming system according to a modification example 6.

[0027] Figure 19 (A), (B) shown in FIG. 21 are schematic diagrams of an image forming system according to a modification example 6.

[0028] Figure 20 (A), (B) shown in FIG. 21 are schematic diagrams of an image forming system according to a modification example 6.

[0029] (A), (B) shown in FIG. 21 are schematic diagrams of an image forming system according to a modification example 6. DETAILED DESCRIPTION

[0030] Hereinafter, an embodiment for carrying out the present application will be explained in detail with reference to the drawings. Also, in each drawing, the same or equivalent parts are assigned with the same symbol, and detailed explanation thereof will be omitted as appropriate.

[0031] First, the entire configuration and operation of the sheet peeling apparatus 1 will be explained with reference to FIG. 1. Figure 1

[0032] The sheet peeling apparatus 1 is an apparatus provided with a sheet peeling section 19 to peel a non-joining section of a double sheet PJ in which two sheets Pl, P2 are joined after being overlapped at a joining section A (refer to (A) of FIG. 1). Figure 4

[0033] The sheet peeling section 19 is to peel the non-joining section of the double sheet PJ by peeling processing, and to insert an intermediate sheet PM between the two sheets Pl, P2 in a state after peeling.

[0034] In particular, in the present embodiment, as the double sheet PJ, a sheet in which two sheets Pl, P2 are overlapped and one side of four sides is joined as the joining section A. That is, the double sheet PJ (two sheets Pl, P2) has only one side (joining section A) connected by heat fusion or the like, and the other part (non-joining section) is overlapped without being joined. Also, as the two sheets Pl, P2 constituting the double sheet PJ, a transparent film material (laminated sheet) can be used.

[0035] Also, the double sheet PJ can be a sheet formed by folding back one sheet. Then, even the double sheet PJ formed like this is defined as two sheets overlapped in the present specification and the like, and the part folded back is defined as the "joining section", and the other part is defined as the "non-joining section".

[0036] ​​Then, between the winding roller 20 and the third conveying roller pair 6, the non-joint portion of the two sheets P1 and P2 constituting the overlapping sheet PJ is peeled off (the two sheets P1 and P2 are separated with the joint A as the center while maintaining the joint A). The action of inserting the intermediate sheet PM (a sheet of ordinary paper, etc.) between the peeled two sheets P1 and P2 is performed by the sheet peeling device 1 (sheet peeling part 19).

[0037] like Figure 1 As shown, the sheet peeling device 1 is provided with a sheet peeling section 19, first and second supply trays 11 and 12, first and second supply rollers 2 and 3, first to third conveying roller pairs 4 to 6, a curved conveying section 36 as a conveying mechanism, a discharge tray 13, first to fifth sensors 41 to 45, a first guide member 25 as an inner restricting member, a second guide member 26 as an outer restricting member, a third guide member 27, etc.

[0038] In addition, the sheet peeling section 19 is provided with a winding roller 20, a moving mechanism 30, a switching claw 15, a peeling claw 16, etc.

[0039] In addition, the sheet peeling device 1 has multiple conveying paths, including a first conveying path K1 (curved conveying path), a second conveying path K2, a third conveying path K3, a first branch conveying path K4, and a second branch conveying path K5. These conveying paths K1 to K5 are used to convey the sheets (overlapping sheets PJ or intermediate sheets PM) and are guided by two opposing conveying guide components (guide plates).

[0040] In detail, overlapping sheets PJ are stacked in the first feed tray 11. Then, the uppermost overlapping sheet PJ on the first feed tray 11 is supplied by the first feed roller 2 and conveyed along the first conveying path K1 by the first conveying roller pair 4.

[0041] Additionally, an intermediate sheet PM is stacked in the second feed tray 12. Then, the uppermost intermediate sheet PM on the second feed tray 12 is supplied by the second feed roller 3.

[0042] The first to third conveyor roller pairs 4 to 6 are each composed of a drive roller and a driven roller with an elastic layer of rubber or the like formed on the mandrel, used to convey the sheet material held in its clamping portion. In the third conveying path K3 from the second conveyor roller pair 5 to the third conveyor roller pair 6, the second conveyor roller pair 5, the winding roller 20, and the third conveyor roller pair 6 are arranged from the upstream side. In particular, the third conveyor roller pair 6 can rotate in both the forward and reverse directions, configured to convey the sheet material in both the forward and reverse directions. Furthermore, the third conveyor roller pair 6 also serves as a discharge roller pair for discharging the sheet material to the discharge disc 13.

[0043] The first to fifth sensors 41 to 45 are all reflective photoelectric sensors that optically detect the presence of sheet material at their respective positions. The first sensor 41 is located near the downstream side of the first conveyor roller pair 4, the second sensor 42 is located near the downstream side of the second supply roller 3, the third sensor 43 is located between the second conveyor roller pair 5 and the winding roller 20 and near the downstream side of the second conveyor roller pair 5, the fourth sensor 44, which serves as a sheet material detection sensor, is located near the downstream side of the winding roller 20 and upstream of the third conveyor roller pair 6, and the fifth sensor 45 is located downstream of the third conveyor roller pair 6.

[0044] Furthermore, in this embodiment, the first conveying path K1 is a curved conveying path, and a curved conveying section 36 is provided as a conveying mechanism. This curved conveying section 36 will be discussed later. Figure 13 , Figure 14 Detailed explanations will be provided.

[0045] Reference Figure 2 , Figure 3 of (and) Figure 5 (B)~(D) Figure 6 The winding roller 20 is described in (A) and other similar documents.

[0046] The winding roller 20 is a roller component that winds the overlapping sheet PJ by rotating in a predetermined rotation direction while holding the gripped portion B (the side opposite to the side where the joint A is formed) at the starting position W. The winding roller 20 is configured to rotate in both forward and reverse directions around the rotation axis 20a by being driven by a drive motor controlled by a control unit.

[0047] Specifically, such as Figure 1 As shown, the overlapping sheet PJ is conveyed forward from the first feed tray 11 via the first conveying path K1, through the second conveying roller pair 5 in the third conveying path K3, and once it passes the position of the winding roller 20, it is conveyed to the position of the third conveying roller pair 6. Then, the overlapping sheet PJ is conveyed in reverse to the position of the winding roller 20 by the third conveying roller pair 6, which is a reversed conveying roller pair, and is wound by the winding roller 20, which rotates counterclockwise, while being held by the holding member 32.

[0048] Then, refer to Figure 5 (C') When the overlapping sheet PJ is wound onto the winding roller 20, the linear velocities of sheet P1 and sheet P2 are proportional to the distance from the center of the winding roller 20 to each sheet P1, P2, such that the linear velocity of the roller surface is proportional to the roller radius. Therefore, since sheet P1 is closer to the center of the winding roller 20 (located on the inner side) than sheet P2, the linear velocity of sheet P1 is slower than that of sheet P2.

[0049] Therefore, the first sheet PI is easily relaxed compared to the second sheet P2, as Figure 5 (D) of FIG. 6, Figure 6 (A) of FIG. 7, and the like, a gap C (a gap C formed by the first sheet PI on the upper side being flexed upward) is formed between the two sheets PI, P2 on one side (the other end side) of the joint A of the overlapped sheet PJ. In this way, the two sheets PI, P2 change from a state in which they are in close contact without a gap to a state in which they are peeled apart (separated).

[0050] Next, the mechanism by which the gap C is formed in the overlapped sheet PJ between the winding roller 20 and the third roller pair 6 will be further described.

[0051] The overlapped sheet PJ wound on the winding roller 20 is in a state in which it is held by the holding member 32 and the sheets are prevented from being misaligned, and therefore slip occurs in the winding roller 20 due to a difference in the circumferential length, and the amount of conveyance of the inner sheet PI decreases compared to the amount of conveyance of the outer sheet P2. As a result, relaxation occurs in the inner sheet PI between the third roller pair 6 and the nip of the winding roller 20.

[0052] At this time, by winding the overlapped sheet PJ on the winding roller 20 by one turn or more, relaxation occurs in the inner and outer circumferences due to the thickness of the sheets, and relaxation occurs in the same manner.

[0053] Then, the relaxation is finally concentrated between the third roller pair 6 and the winding roller 20, and a gap C is formed between the two sheets PI, P2.

[0054] In detail, assuming that the thickness of the inner sheet PI is ΔR, and the distance from the rotational axis 20a (the axis center) of the winding roller 20 to the inner sheet PI is R, the distance from the rotational axis 20a (the axis center) of the winding roller 20 to the outer sheet P2 is R+ΔR. Since the radii differ only by the thickness ΔR of the inner sheet PI, when the overlapped sheet PJ is wound on the winding roller 20 by one turn, a circumferential length difference of 2 x ΔR x π is generated in the inner sheet PI and the outer sheet P2. Therefore, when the overlapped sheet PJ is wound on the winding roller 20 by M turns, relaxation of 2 x ΔR x π x M occurs in the inner sheet PI.

[0055] Then, the relaxation is finally concentrated between the third roller pair 6 and the winding roller 20, and a gap C corresponding to 2 x ΔR x π x M is formed between the two sheets PI, P2.

[0056] In particular, in the present embodiment, in order to significantly form the gap C as described above, the overlapped sheet PJ is wound on the winding roller 20 by at least one turn or more.

[0057] Thus, in the present embodiment, by providing the winding roller 20 that winds the overlapped sheet material PJ, the peeling of the overlapped sheet material PJ can be performed without much increase in size and cost of the sheet peeling apparatus 1.

[0058] Here, in the present embodiment, Figure 2 The configuration of the holding member 32 of (A) is, as shown in Figure 5 As shown in (B') of (A), the holding member 32 holds the held portion B without coming into contact with the end surface of the front end of the one end side (the side of the held portion B) of the overlapped sheet material PJ.

[0059] Further, the "end surface" of the overlapped sheet material is defined as a surface (side surface) in the thickness direction that connects the front surface and the back surface of the overlapped sheet material. Thus, the overlapped sheet material of a rectangular shape has four end surfaces, front and back and left and right.

[0060] In detail, the configuration of the holding member 32 is such that the end surface of the one end side of the overlapped sheet material PJ is not regulated to be restricted from coming into contact with any member, and even if it comes into contact, the held portion B is held by being sandwiched from the direction perpendicular to the sheet surface of the held portion B with respect to the overlapped sheet material PJ between the holding member 32 and the receiving portion 20b of the winding roller 20. The receiving portion 20b is formed in the outer peripheral portion of the winding roller 20, and has a shape that can be opposed to the holding member 32. In more detail, the receiving portion 20b is formed in a portion that is recessed inward from the imaginary outer peripheral surface (circular outer peripheral surface that winds the overlapped sheet material PJ) of the winding roller 20.

[0061] In detail, the overlapped sheet material PJ is not regulated to be restricted from coming into contact with a specific member (for example, the holding member 32 itself) in the state of being sandwiched and held by the holding member 32 and the receiving portion 20b with the end surface (front end surface) of the one end side thereof, and the end surface (front end surface) of the one end side thereof is held by being sandwiched by the holding member 32 on the outer side and the receiving portion 20b on the inner side without coming into contact with any member.

[0062] Thus, the end surface (front end surface) of the one end side of the overlapped sheet material PJ does not come into contact with Figure 5 the obtuse angle portion (wedge-shaped portion) of the holding member 32 of (B') and the held portion B of the one end side of the overlapped sheet material PJ is held by the holding member 32 and the receiving portion 20b.

[0063] Then, the end surface (front end) of the one end side of the overlapped sheet material PJ coincides with the end portion (right end portion) of the contact surface of the holding member 32 and the receiving portion 20b without coming into contact. Figure 5 (B') of (A).

[0064] In addition, the one-end-side end surface (front end) of the overlapping sheet PJ can also be positioned further inside the sheet than the front end of the one-end-side (further to the other-end-side than the front end of the one-end-side) in a manner such that the front end of the one-end-side of the overlapping sheet PJ is avoided from the contact surface of the holding member 32 and the receiving portion 20b and protrudes. In addition, the one-end-side end surface (front end) can also be positioned inside the contact surface.

[0065] Therefore, compared to a case in which the front end surface is brought into contact, the adverse situation in which the overlapping sheet PJ (particularly, the portion of the front end) is damaged can be alleviated.

[0066] In addition, in the present embodiment, the overlapping sheet PJ wound around the winding roller 20 is formed with the engaging portion A in the other-end-side opposite to the one-end-side of the held portion B.

[0067] Here, in the present embodiment, at least one of the holding member 32 (held portion) and the receiving portion 20b is formed of an elastic material such as rubber, a spring, a leaf spring, or the like.

[0068] Therefore, compared to a case in which the front end surface is brought into contact, the adverse situation in which the overlapping sheet PJ (particularly, the portion of the front end) is damaged can be alleviated.

[0069] As shown in (A) of (A) of Figure 2 , Figure 3 , the moving mechanism 30 moves the holding member 32 between a holding position (position shown in (A) of (A) of Figure 2 ) at which the holding member 32 can hold the overlapping sheet PJ and a retreat position (position shown in (B) of (B) of Figure 3 ) at which the holding member 32 retreats from the holding position. Figure 2 Figure 3

[0070] In detail, the moving mechanism 30 is constituted by the arm member 31, a compression spring 33 as a force applying member, a cam 34, a motor (not shown) that rotates the cam 34 in the forward and reverse directions, and the like.

[0071] ​​The arm member 31 is rotatably held on the winding roller 20 about the support shaft 31a while holding the gripping member 32. In this embodiment, the gripping member 32 is integrally formed (held) on the base end side, i.e., the front end, of the arm member 31. Alternatively, the gripping member 32 can be a separate component from the arm member 31, configured such that the gripping member 32 is provided (held) on the arm member 31. In either case, the arm member 31 holding the gripping member 32 rotates together with the winding roller 20 about the rotation axis 20a.

[0072] The function of the compression spring 33 is to act as a force-applying component to the arm component 31, so that the gripping component 32 can be released from its position. Figure 2 The retreat position shown in (B) is moved to Figure 2 The gripping position is shown in (A). Specifically, one end of the compression spring 33 is connected to a fixed position near the rotation shaft 20a, and the other end is connected to one end of the arm member 31 (the free end opposite to the side where the gripping member 32 is located, which is sandwiched between the support shaft 31a).

[0073] The cam 34 pushes the arm component 31 against the force applied by the compression spring 33 (force-applying component), so that the gripping component 32 moves from... Figure 2 The grip position shown in (A) is moved to... Figure 2 The retraction position is shown in (B). The cam 34 is driven to rotate in both directions at the desired rotation angle by a motor controlled by the control unit. The cam 34 is separate from the winding roller 20 and is rotatably held on the device frame with the camshaft 34a as the center.

[0074] like Figure 2 (A) Figure 3 As shown in (A), when the cam 34 is not in contact with the arm member 31, the arm member 31 is subjected to force by the compression spring 33, and the gripping member 32 is pressed against the receiving part 20b (closed state).

[0075] In contrast, such as Figure 2 (B) Figure 3 As shown in (B), when the cam 34 is pressing the arm component 31, the arm component 31 moves in opposition to the force applied by the compression spring 33, centered on the support shaft 31a. Figure 2 Rotating (B) counterclockwise changes the state in which the holding member 32b disengages from the receiving part 20b (open state). This open state prevents the overlapping sheet PJ from being held (holding release state).

[0076] Then, when the gripping member 32 is in the open state (in the retracted position), the overlapping sheet PJ is between the gripping member 32 and the bearing portion 20b. When the gripping member 32 moves to the closed state (in the gripping position), the overlapping sheet PJ is gripped by the gripping member 32 and the bearing portion 20b.

[0077] In addition, in this embodiment, such as Figure 3 As shown, the cylindrical roller portion of the winding roller 20 is divided into multiple (seven) sections in the axial direction. Then, multiple gripping members 32 and arm members 31 are arranged in such a way that they align with the division positions of each roller portion (the recesses between adjacent roller portions), and multiple cams 34 are provided that can abut against these multiple arm members.

[0078] In this way, instead of placing the gripping position of the overlapping sheet PJ over the entire axial area, by dividing it along the axial direction, the load required to grip the overlapping sheet PJ can be distributed, while also reducing damage to the leading edge of the overlapping sheet PJ. Furthermore, this configuration is useful when the required gripping force increases, such as when gripping large or heavy overlapping sheet PJs.

[0079] In addition, in this embodiment, such as Figure 1 As shown, the third conveying path K3 is formed by a straight conveying guide plate. Alternatively, a curved plate can also be used to form the third conveying path. Furthermore, in this case, the gripping position of the overlapping sheet PJ on the winding roller 20 can be changed to be closer to the rotation axis 20a than in this embodiment. Moreover, in such a case, the positions of the gripping member 32 and the supporting portion 20b in this embodiment can be interchanged, with the gripping member 32 positioned on the side closer to the rotation axis 20a than the supporting portion 20b in the winding roller 20.

[0080] Here, refer to Figure 1 , Figure 4 (D) Figure 5 In the sheet peeling apparatus 1 of this embodiment, a fourth sensor 44, which serves as a sheet detection sensor, is provided to detect the overlapping sheet PJ being conveyed toward the winding roller 20. Then, the moving mechanism 30 is controlled based on the detection result of the fourth sensor 44 (sheet detection sensor).

[0081] Specifically, the fourth sensor 44 is configured in the conveying guide component of the conveying path between the winding roller 20 and the third conveying roller pair 6. Then, as... Figure 4 (D) Figure 5As shown in (A), when the overlapping sheet PJ is conveyed in reverse towards the winding roller 20 via the third conveyor roller pair 6 with the gripped portion B as the leading edge, its leading edge (i.e., the leading edge during reverse conveying) is detected by the fourth sensor 44. Then, this detection timing is used as a trigger to adjust the timing of stopping the overlapping sheet PJ in the gripping position and the timing of gripping the gripped portion B by the gripping member 32. Specifically, starting from the detection of the leading edge of the overlapping sheet PJ by the fourth sensor 44, after a predetermined time, the reverse conveying of the overlapping sheet PJ by the third conveyor roller pair 6 is stopped, and the gripping member 32 is moved from... Figure 2 The retreat position shown in (B) is moved to Figure 2 The gripping position shown in (A) is used to rotate the cam 34 and cause the arm component 31 (moving mechanism 30) to rotate.

[0082] By performing such control, the clamping action by the holding member 32 and the bearing part 20b can be performed with high precision without the end face of the overlapping sheet PJ coming into contact with any component.

[0083] Here, as mentioned earlier, the third conveying roller pair 6 is formed in the third conveying path K3 (conveying path) between the winding roller 20, and conveys the overlapping sheet PJ towards the winding start position W of the winding roller 20 with one end side (the side of the gripped part B) as the leading edge.

[0084] Additionally, refer to Figure 6 (A)~(C) Figure 9 , Figure 10 The peeling claw 16 is described in (A) to (C).

[0085] For an overlapping sheet PJ that is wound from one end (the side of the gripped portion B) by the winding roller 20 and held by the third conveying roller pair 6 (the side of the joint portion A) at the other end, the peeling claw 16 is a claw-shaped component formed in the gap C between the two sheets P1 and P2, inserted from the end in the width direction between the winding roller 20 and the third conveying roller pair 6.

[0086] Specifically, in this embodiment, the peeling claws 16 are respectively arranged in the width direction ( Figure 6 The vertical direction of the paper surface, Figure 9 The peeling claw 16 has two ends in the left-right direction. Additionally, the peeling claw 16 has a plate and wings extending in the vertical direction. In the direction in which the peeling claw 16 is inserted into the overlapping sheet PJ, the plate has a rear end and a front end at its center in the width direction. The plate thickness and width are respectively formed to gradually increase from the front end to the rear end. Furthermore, the vertical length of the wings is formed to gradually increase from the front end of the wings in the direction of insertion into the overlapping sheet PJ. Additionally, the plate and wings of the peeling claw 16 form a cross shape at the rear end (see reference).Figure 10 (A) Furthermore, the pair of peeling claws 16 are configured to move separately in the width direction without contacting each other via a moving mechanism (not shown) controlled by the control unit.

[0087] like Figure 6 As shown in (A), the peeling claw 16 configured in this way is in a standby position in the third conveying path K3, which does not obstruct the conveying of overlapping sheets such as PJ. Figure 10 The device remains in position (A) until a gap C is formed in the overlapping sheet PJ. Then, when separating the overlapping sheet PJ (two sheets P1 and P2), as shown... Figure 9 , Figure 10 As shown in (B), the peeling claw 16 enters the gap C of the overlapping sheet PJ and ensures that the gap C is large.

[0088] Alternatively, a pinion rack and pinion mechanism can be used as the moving mechanism that moves the peeling claw 16 in the width direction.

[0089] More specifically, the drive mechanism 76, which serves as a moving mechanism for moving a pair of peeling claws 16 along the width direction, can use... Figure 11 The institution shown in (A) or Figure 11 The institution shown in (B).

[0090] like Figure 11 As shown, in this embodiment, the two peeling claws 16 are arranged facing each other and on the ground. Figure 11 The drive mechanism 76 shown in (A) is a mechanism that moves the two peeling claws 16 by means of a belt drive. Figure 11 The drive mechanism 76 shown in (B) is a mechanism that moves the two peeling claws 16 by means of a rack and pinion.

[0091] In detail, Figure 11 The drive mechanism 76 shown in (A) tensions a belt 80 between a drive pulley 78 and a driven pulley 79, and two peeling claws 16 are mounted opposite each other on the belt 80. Specifically, one peeling claw 16 is connected to the lower belt 80, and the other peeling claw 16 is connected to the upper belt 80. Additionally, a drive gear is provided on the drive pulley 78 that meshes with a motor gear mounted on the motor shaft of the drive motor 77. The rotational output of the drive motor 77 is then transmitted to the belt 80. Specifically, when the motor gear of the drive motor 77... Figure 11 When (A) rotates clockwise, the two peeling claws 16 approach each other, and when the motor gear of the drive motor 77 moves towards... Figure 11 When (A) rotates counterclockwise, the two peeling claws 16 separate from each other.

[0092] In addition,Figure 11 In the drive mechanism 76 shown in (B), two racks 83A, 83B engaged with a pinion 84 are arranged to extend in opposite directions to each other, and two peeling claws 16 are arranged to oppose each other on each rack 83A, 83B. A drive gear is arranged in the pinion 84 to engage with a motor gear arranged on a motor shaft of the drive motor 82. Then, the rotational output of the drive motor 82 is transmitted to the racks 83A, 83B. Specifically, when the motor gear of the drive motor 82 rotates in the clockwise direction of (B), the two peeling claws 16 approach each other, and when the motor gear of the drive motor 82 rotates in the counterclockwise direction of (B), the two peeling claws 16 separate from each other. Figure 11 Figure 11

[0093] The peeling claw 16 in the present embodiment is formed in a shape having a plate and a wing extending in the up-and-down direction as described above, and is configured to be movable in the width direction of the superposed sheet PJ by the drive of the drive mechanism 76, so it is possible to smoothly insert into the gap C generated in the superposed sheet PJ as shown in (B). Figure 10

[0094] Further, referring to (A) to (C) and the like, the switching claw 15 is arranged between the peeling claw 16 and the winding roller 20. Then, in two branch conveyance paths K4, K5 that branch from the third conveyance path K3 in different directions with the third conveyance path K3 (conveyance path) sandwiched therebetween, the two page sheets PI, P2 of the superposed sheet PJ peeled by the peeling claw 16 are guided in different directions, respectively. At this time, the switching claw 15 as a claw-shaped moving member is rotationally moved and guides the superposed sheet PJ in such a manner as to rotate in the forward and reverse directions within a prescribed angle range. Figure 7 In detail, in the present embodiment, the switching claw 15 is arranged to be divided into a plurality of pieces with a gap in the width direction (a direction perpendicular to the plane of the paper of (A)).

[0095] Figure 7 The switching claw 15 thus configured stands by in a standby position (a position shown in (A)) in the third conveyance path K3 that does not interfere with the conveyance of the superposed sheet PJ or the like until the girdle sheet PI, P2 of the superposed sheet PJ peeled by the peeling claw 16 is guided to the branch conveyance paths K4, K5. Then, the switching claw 15 is rotationally moved as shown in (B) and (C) when the two page sheets PI, P2 of the superposed sheet PJ (sheets separated by the peeling claw 16) are guided to the branch conveyance paths K4, K5 (guided in different directions), respectively.

[0096] Figure 7 Figure 7 ​​​​​​As shown in (B), viewed from the side of the overlapping sheet PJ, it is rotated to a position that obstructs entry into the third conveying path K3.

[0097] Thus, the first sheet P1 is guided to the first branch conveying path K4, and the second sheet P2 is guided to the second branch conveying path K5.

[0098] In detail, such as Figure 7 As shown in (A), the overlapping sheet PJ is conveyed to the other end (left side) by the third conveyor roller pair 6 to unwind one end of the overlapping sheet PJ from the winding roller 20 after the peeling claw 16 is inserted into the gap C. Then, as Figure 7 As shown in (B), after conveying the overlapping sheet PJ, as Figure 7 As shown in (C), the overlapping sheet PJ is again conveyed to one end (right side) by the third conveyor roller pair 6, and the sheet P1 on one side, peeled off by the peeling claw 16, is guided to the first branch conveyor path K4, while the sheet P2 on the other side is guided to the second branch conveyor path K5. Then, as... Figure 8 As shown in (A) to (C), the intermediate sheet PM is conveyed to one end of the third conveying path K3 so that the intermediate sheet PM is inserted between the two sheets P1 and P2 in the peeled state.

[0099] Additionally, refer to Figure 6 In (A), the first guide member 25, as an inner limiting member, functions as a peeling claw 16 (see reference) in the third transport path K3. Figure 6 Between (B) and the winding roller 20, the slack of the first sheet P1 wound inside the winding roller 20 is limited between the two sheets P1 and P2 of the overlapping sheet PJ.

[0100] Additionally, refer to Figure 6 (A) etc., the second guide member 26 functions as an outer limiting member, and in the third conveying path K3, the peeling claw 16 (refer to) Figure 6 Between (B) and the winding roller 20, the amount of slack is limited when the second sheet P2, which is wound outside the winding roller 20, between the two sheets P1 and P2 of the overlapping sheet PJ, is slack due to uneven rotation of the winding roller 20 or the third conveying roller pair 6.

[0101] The following is for reference Figure 4 to Figure 8 The operation of peeling overlapping sheets PJ in sheet peeling device 1 (sheet peeling section 19) will be explained.

[0102] In addition, its action descriptions should be appropriately used. Figure 9 , Figure 10 To illustrate the action of the peeling claw 16, while using Figure 12 The flowchart is used to illustrate the control flow.

[0103] First, when the superimposed sheet PJ is fed from the first supply tray 11 (step S1), as shown in (A) of FIG. 6, it is fed in the forward direction in the third conveying path K3 by the second conveying roller pair 5 with the joint portion A at the front. Figure 12 Figure 4 In the third conveying path K3, the superimposed sheet PJ is conveyed in the forward direction with the joint portion A at the front. Figure 4

[0104] At this time, the moving mechanism 30 is controlled so that the holding member 32 is in a holding position where it is located inside the outer periphery of the winding roller 20. That is, the cam 34 is moved to a position where it does not press the arm member 31. In this way, when the holding member 32 is in the holding position, the conveying of the sheet in the third conveying path K3 is not hindered by the holding member 32. In addition, the free end of the switching claw 15 is moved downward and is in standby in a standby position where it does not hinder the conveying of the sheet in the third conveying path K3.

[0105] Then, as shown in (B) of FIG. 6, the superimposed sheet PJ is conveyed by the third conveying roller pair 6 until the held portion B (the forward end, the one end side) of the superimposed sheet PJ passes the position of the winding roller 20, and after the superimposed sheet PJ is further conveyed in the forward direction, as shown in (C) of FIG. 6, the conveying of the superimposed sheet PJ is stopped. The timing at which the conveying is stopped is triggered by the timing at which the joint portion A (the forward end, the other end side) of the superimposed sheet PJ is detected by the third sensor 43, and the timing at which the superimposed sheet PJ is conveyed by the third conveying roller pair 6 by a predetermined amount XI from the detection by the third sensor 43 (steps S2 and S3). Figure 4 Figure 4 Figure 12

[0106] Then, as shown in (C) of FIG. 6, when the conveying of the superimposed sheet PJ by the third conveying roller pair 6 is temporarily stopped, the holding member 32 is moved from the holding position to the retreat position (step S4). That is, the cam 34 is moved to a position where it presses the arm member 31. This state is a state in which the held portion B of the superimposed sheet PJ can be received between the holding member 32 and the receiving portion 20b. Figure 4 Figure 12

[0107] Then, as shown in (D) of FIG. 6, the third conveying roller pair 6 is reversely rotated, and the reverse conveying of the superimposed sheet PJ is started (step S5). At this time, in order to convey the held portion B of the superimposed sheet PJ to the holding position of the winding roller 20, the held portion B (the reverse end, the one end side) of the superimposed sheet PJ is detected by the fourth sensor 44. Figure 4 Figure 12

[0108] Figure 5 ​​​​​​​​​​(A) and (B) of FIG. 8, the held portion B of the superposed sheet PJ is detected by the fourth sensor 44, and the superposed sheet PJ is transported by the third roller pair 6 by a prescribed amount X2 and stopped (steps S6, S7) until the held portion B of the superposed sheet PJ reaches the position W at which the winding of the winding roller 20 is started at the prescribed rotational position (refer to Figure 12 : steps S6, S7) until the held portion B of the superposed sheet PJ reaches the position W at which the winding of the winding roller 20 is started at the prescribed rotational position (refer to Figure 2 and the like).

[0109] Then, as shown in (B) of FIG. 8, the holding member 32 is moved from the retreat position to the holding position at the prescribed rotational position of the winding roller 20 (step S8). That is, the cam 34 is rotated to a position at which the arm member 31 is not pressed. This state is shown in (B') of FIG. 8, and is a state in which the end face of the one end side of the superposed sheet PJ does not come into contact with any member, and the held portion B is held between the holding member 32 and the receiving portion 20b. Also, the winding start position W of the winding roller 20 is the position of the outer peripheral surface of the winding roller 20 at the prescribed rotational position. However, at the retreat position of (A) of FIG. 8 or the holding position of (B) of FIG. 8, the outer peripheral surface of the winding roller 20 itself does not exist. Therefore, the winding start position W is the winding start position W of the imaginary outer peripheral surface. Figure 5 Figure 12 : step S8). That is, the cam 34 is rotated to a position at which the arm member 31 is not pressed. This state is shown in (B') of FIG. 8, and is a state in which the end face of the one end side of the superposed sheet PJ does not come into contact with any member, and the held portion B is held between the holding member 32 and the receiving portion 20b. Also, the winding start position W of the winding roller 20 is the position of the outer peripheral surface of the winding roller 20 at the prescribed rotational position. However, at the retreat position of (A) of FIG. 8 or the holding position of (B) of FIG. 8, the outer peripheral surface of the winding roller 20 itself does not exist. Therefore, the winding start position W is the winding start position W of the imaginary outer peripheral surface. Figure 5 Figure 2 : step S8). That is, the cam 34 is rotated to a position at which the arm member 31 is not pressed. This state is shown in (B') of FIG. 8, and is a state in which the end face of the one end side of the superposed sheet PJ does not come into contact with any member, and the held portion B is held between the holding member 32 and the receiving portion 20b. Also, the winding start position W of the winding roller 20 is the position of the outer peripheral surface of the winding roller 20 at the prescribed rotational position. However, at the retreat position of (A) of FIG. 8 or the holding position of (B) of FIG. 8, the outer peripheral surface of the winding roller 20 itself does not exist. Therefore, the winding start position W is the winding start position W of the imaginary outer peripheral surface. Figure 5 Figure 5 : step S8). That is, the cam 34 is rotated to a position at which the arm member 31 is not pressed. This state is shown in (B') of FIG. 8, and is a state in which the end face of the one end side of the superposed sheet PJ does not come into contact with any member, and the held portion B is held between the holding member 32 and the receiving portion 20b. Also, the winding start position W of the winding roller 20 is the position of the outer peripheral surface of the winding roller 20 at the prescribed rotational position. However, at the retreat position of (A) of FIG. 8 or the holding position of (B) of FIG. 8, the outer peripheral surface of the winding roller 20 itself does not exist. Therefore, the winding start position W is the winding start position W of the imaginary outer peripheral surface.

[0110] Then, as shown in (C) of FIG. 8, the winding roller 20 is caused to rotate in the reverse direction (counterclockwise direction) while the third roller pair 6 is caused to reverse again in the state in which the superposed sheet PJ is held by the holding member 32. At this time, if the rotation of the winding roller 20 continues, as shown in (D) of FIG. 8, a gap C is formed between the two sheets Pl, P2 of the superposed sheet PJ between the winding roller 20 and the third roller pair 6. At this time, the superposed sheet PJ is in a state in which it is restricted from being bent by the first and second conveying guide members 25, 26 in the vicinity of the winding roller 20. Therefore, the gap C of the superposed sheet PJ is concentratedly formed in a position close to the third roller pair 6. Figure 5 Figure 5 : step S8). That is, the cam 34 is rotated to a position at which the arm member 31 is not pressed. This state is shown in (B') of FIG. 8, and is a state in which the end face of the one end side of the superposed sheet PJ does not come into contact with any member, and the held portion B is held between the holding member 32 and the receiving portion 20b. Also, the winding start position W of the winding roller 20 is the position of the outer peripheral surface of the winding roller 20 at the prescribed rotational position. However, at the retreat position of (A) of FIG. 8 or the holding position of (B) of FIG. 8, the outer peripheral surface of the winding roller 20 itself does not exist. Therefore, the winding start position W is the winding start position W of the imaginary outer peripheral surface.

[0111] : step S8). That is, the cam 34 is rotated to a position at which the arm member 31 is not pressed. This state is shown in (B') of FIG. 8, and is a state in which the end face of the one end side of the superposed sheet PJ does not come into contact with any member, and the held portion B is held between the holding member 32 and the receiving portion 20b. Also, the winding start position W of the winding roller 20 is the position of the outer peripheral surface of the winding roller 20 at the prescribed rotational position. However, at the retreat position of (A) of FIG. 8 or the holding position of (B) of FIG. 8, the outer peripheral surface of the winding roller 20 itself does not exist. Therefore, the winding start position W is the winding start position W of the imaginary outer peripheral surface.

[0112] ​​​​Further, by providing the fourth sensor 44 between the third conveying roller pair 6 and the winding roller 20 on the side of the winding roller 20, the amount X2 of the sheet to be conveyed from the point at which the reverse end of the detection overlapped sheet PJ is detected can be shortened regardless of the length of the sheet. Thus, unevenness in the amount X2 of the conveyance can be suppressed, and the held portion B of the overlapped sheet PJ can be conveyed to the desired holding position with high precision.

[0113] Thus, the fourth sensor 44 is preferably arranged in a position close to the winding roller 20.

[0114] After that, while the reversal of the third conveying roller pair 6 of (D) is continued Figure 6 , the winding of the overlapped sheet PJ from the winding roller 20 is started at the point of time at which the amount of conveyance of the third conveying roller pair 6 reaches the prescribed amount X3, as shown in (A) of Figure 12 , the winding of the overlapped sheet PJ by the winding roller 20 is stopped at the same time as the conveyance by the third conveying roller pair 6 is stopped Figure 6 : Step S9). This state is a state in which the overlapped sheet PJ is wound more than one turn on the winding roller 20, and is also a state in which the gap C of the overlapped sheet PJ is sufficiently expanded. Further, the joint portion A of the overlapped sheet PJ is in a state in which it is gripped by the third conveying roller pair 6.

[0115] Then, as shown in (B) of Figure 12 , the peeling claw 16 is inserted into the gap C of the overlapped sheet PJ which is sufficiently expanded Figure 9 : Step S10). That is, as shown in (A) of Figure 10 , Figure 10 , a pair of peeling claws 16 are moved from the standby positions of (A) to the peeling positions of (B), respectively. Figure 10 Figure 6 Then, as shown in (C) of ,

[0116] , the rotation of the winding roller 20 in the forward direction (clockwise direction) is started at the same time as the forward rotation of the third conveying roller pair 6 is started in the state in which the peeling claw 16 is inserted into the gap C Figure 12 : Step Sll). Figure 7 Further, at this time, in the case in which the overlapped sheet PJ can be conveyed by the rotation of the winding roller 20 in the forward direction (clockwise direction), the joint portion A can not be gripped by the third conveying roller pair 6. That is, the joint portion A of the overlapped sheet PJ can be conveyed to the side of the third conveying roller pair 6 by the rotation of the winding roller 20 in the forward direction, and then the joint portion A can be gripped between the third conveying roller pair 6, and the overlapped sheet PJ can be conveyed by the third conveying roller pair 6.

[0117] Then, as shown in (D) of

[0118] , the peeling claw 16 is moved to the standby position of (E) of Figure 12As shown in (A), after the third conveyor roller pair 6 is rotated forward to convey the overlapping sheet PJ by a specified amount X4, the forward rotation of the third conveyor roller pair 6 and the forward rotation of the winding roller 20 are stopped respectively. Figure 12 (Step S12). At this time, the overlapping sheet PJ is not wound on the gripping member 32, and the gripping member 32 is in a state where it can release the gripped portion B of the overlapping sheet PJ located at the winding start position W. That is, the gripping member 32 can move from the gripping position of the gripped portion B to the retraction position at the winding start position W.

[0119] Then, in this state, the gripping member 32 is moved from the gripping position to the retracting position, so that the gripping member 32 is positioned on the third conveying path K3. Figure 2 Step S13). That is, as follows: Figure 7 As shown in (B), cam 34 is rotated and moved to the position of pressing arm member 31. This state releases the grip of the overlapping sheet PJ by the gripping member 32. Alternatively, in this embodiment, although the gripping member 32 is released by moving cam 34 (moving mechanism 30), if the pulling force caused by the conveying of the third conveying roller 6 is greater than the gripping force of the gripping member 32, the gripping member 32 may be released by pulling caused by the conveying of the third conveying roller 6 without moving cam 34 (moving mechanism 30).

[0120] Then, as Figure 12 As shown in (B), the third conveyor roller 6 rotates forward again, initiating the forward conveying of the overlapping sheet PJ. Figure 7 Step S14). In this way, the gripped portion B (front rear end, one end side) of the overlapping sheet PJ is detected by the fourth sensor 44. Then, after the gripped portion B (front rear end, one end side) of the overlapping sheet PJ passes over the switching claw 15, the gripping member 32 moves from the retracted position to the gripping position, while the switching claw 15 rotates clockwise from the standby position to the switching position. Then, as... Figure 7 As shown in (B), when the gripped portion B at the forward rear end of the overlapping sheet PJ reaches the vicinity of the peeling claw 16, the rear ends of the two sheets P1 and P2 are significantly separated and opened.

[0121] Then, the timing detected by the fourth sensor 44 at the forward rear end of the overlapping sheet PJ is used as a trigger. After the third conveyor roller conveys a predetermined amount X5 of the 6 pairs of overlapping sheets PJ and stops, as follows: Figure 12 As shown in (C), the third conveyor roller 6 is reversed to begin the reverse conveying of the overlapping sheet PJ. Figure 7(Steps S15 and S16). At this time, because the free end of the switching claw 15 is located at the switching position for cutting the overlapping sheet PJ and entering the third conveying path K3, the two sheets P1 and P2 in the peeled state are as follows: Figure 1 As shown in (C), they are respectively guided into two branch conveyor paths K4 and K5. At this time, in order to stop the conveying near the joint A of the overlapping sheet PJ held by the third conveyor roller 6, the fifth sensor 45 (refer to) is used to control the conveying. Figure 8 To detect the joint A (reverse rear end, one end side) of the overlapping sheet PJ.

[0122] Then, as Figure 1 As shown in (A), the reverse rear end of the overlapping sheet PJ is connected by the fifth sensor 45 (refer to). Figure 12 The detection timing serves as the trigger, stopping after the third conveyor roller has conveyed a specified amount (X6) of overlapping sheet PJ to 6 pairs of sheets. Figure 8 (Steps S17 and S18). At this time, the joint A of the overlapping sheet PJ is either located at the clamping part of the third conveyor roller pair 6, or located on the downstream side slightly to the left of the clamping part. That is, the other end of the overlapping sheet PJ is clamped by the third conveyor roller pair 6.

[0123] Then, as Figure 1 As shown in (A), from the second supply tray 12 (refer to) Figure 12 Start the conveying of intermediate sheet PM ( Figure 8 Step S19). At this time, the leading edge (front end, other end) of the intermediate sheet PM is detected by the third sensor 43. Furthermore, as... Figure 8 As shown in (B), the peeling claw 16 is moved to the standby position.

[0124] Then, as Figure 12 As shown in (C), the timing of the forward leading edge of the intermediate sheet PM being detected by the third sensor 43 is used as a trigger. After the intermediate sheet PM has been conveyed by the second conveyor roller pair 5 for a predetermined amount X7, the forward conveying of the overlapping sheet PJ by the third conveyor roller pair 6 is started again. Figure 1 (Steps S20 and S21). At this point, the intermediate sheet PM is held with high precision in the desired position between the two sheets P1 and P2.

[0125] Thus, the process of inserting the intermediate sheet PM between the two sheets P1 and P2 of the overlapping sheet PJ is completed. Furthermore, the overlapping sheet PJ with the intermediate sheet PM inserted is placed onto the discharge tray 13 (see reference 6) by the forward conveying of the third conveyor roller 6. Figure 6 )superior.

[0126] In addition, in this embodiment, the overlapping sheet PJ is Figure 6In state (A), a gap C is formed between the two sheets P1 and P2 through the non-jointing part on the joint A side, so that the two sheets P1 and P2 are peeled off (separated).

[0127] In contrast, Figure 5 In state (A), if the overlapping sheet PJ is held by the third conveyor rollers 6 with sufficient force, then the joint A can also be used as the held part B. That is, in Figure 1 In (A) to (D), with the joint A of the overlapping sheet PJ held by the gripping member 32 and the bearing part 20b, the overlapping sheet PJ is wound on the winding roller 20, and the non-jointing side is clamped and conveyed by the third conveying roller pair 6. At this time, by rotating the third conveying roller pair 6, the sheets P1 and P2 of the overlapping sheet PJ are conveyed synchronously without slipping. For example, by increasing the clamping pressure of the third conveying roller pair 6, or by making the roller material a material with a high coefficient of friction, or by controlling the driving method of each roller of the third conveying roller pair 6, slippage of the two sheets P1 and P2 is less likely to occur, thereby forming the desired gap C in the overlapping sheet PJ to peel (separate) the two sheets P1 and P2. In this case, the number of times the overlapping sheet PJ is conveyed until the intermediate sheet PM is inserted into the overlapping sheet PJ can also be reduced.

[0128] Here, refer to Figure 13 , Figure 14 , Figure 13 In the sheet peeling apparatus 1 of this embodiment, a curved conveying section 36 is provided as a conveying mechanism to make the overlapping sheet PJ face the conveying direction ( Figure 1 The direction of the white arrow) intersecting ( Figure 13 To the left, Figure 13 The black arrow points in the direction that is roughly perpendicular to the sheet surface, and the sheet is bent while being conveyed to the sheet peeling section 19 (winding roller 20).

[0129] In detail, such as Figure 13 As shown, the curved conveying section 36, which is a conveying mechanism, is composed of a conveyor belt 36a as a belt component and opposing rollers 36b as roller components.

[0130] The conveyor belt 36a, which is a belt component, is tensioned and supported by two rollers and is positioned on the side opposite to the first sheet P1 of the overlapping sheet PJ.

[0131] The opposing roller 36b, which is a roller component, is a roller component that forms a clamping part for conveying overlapping sheet PJ by pressing against the belt surface (the belt surface located between the two rollers) of the conveyor belt 36a (belt component).

[0132] These components constituting the bending conveyor section 36 are driven by a drive mechanism (not shown) to respectively... Figure 13rotates in the direction of the arrow.

[0133] As shown in Figure 1 , in the curved conveyance section 36, the conveyance belt 36a is pressed by the opposed rollers 36b and is bent in the direction of the black arrow, and a nip section along the curvature of the opposed rollers 36b is formed.

[0134] Then, by making the superimposed sheet PJ pass through the nip section of the curved conveyance section 36, even if the two-page sheet P1, P2 constituting the superimposed sheet PJ are electrostatically adhered to each other with a strong force at a portion other than the joint section A (non-joint section), etc., the superimposed sheet PJ (two-page sheet P1, P2) can be peeled off well by the sheet peeling section 19 (refer to Figure 5 , etc.).

[0135] In detail, the superimposed sheet PJ sometimes is placed on the first supply tray 11 in a state in which the two-page sheet P1, P2 are electrostatically adhered to each other with a strong force at a portion other than the joint section A (non-joint section) (or, sometimes becomes such a state after being placed on the first supply tray 11).

[0136] Even if the superimposed sheet PJ in such an adhered state is directly wound on the winding roller 20 of the sheet peeling section 19, a slack difference of the two-page sheet P1, P2 explained in (C) of the foregoing description, etc., is hardly formed, and a sufficient gap C capable of being inserted by the peeling claw 16 is no longer formed between the two-page sheet P1, P2. Therefore, a defective condition (peeling defect) in which the superimposed sheet PJ (two-page sheet P1, P2) cannot be peeled off sufficiently occurs, and the insertion processing of the intermediate sheet PM cannot be performed. Figure 1

[0137] In contrast to this, in the present embodiment, since the superimposed sheet PJ is bent in a direction different from the conveyance direction by the curved conveyance section 36 in the conveyance path from the first supply tray 11 to the sheet peeling section 19, the electrostatic adhesion force of the two-page sheet P1, P2 is weakened. Therefore, the peeling defect of the superimposed sheet PJ in the sheet peeling section 19 can be alleviated.

[0138] Here, in the present embodiment, as shown in Figure 16 (and (B) of Figure 14 ), the curved conveyance section 36 (conveyance mechanism) is provided in the curved conveyance path (first conveyance path K1).

[0139] By the conveyance path K1 curved in this way, the superimposed sheet PJ is bent along the curved shape thereof so that the electrostatic adhesion force of the two-page sheet P1, P2 is weakened. Then, by further bending the superimposed sheet PJ in this state by the curved conveyance section 36, the adhesion force of the two-page sheet P1, P2 is further weakened.

[0140] ​In particular, in this embodiment, the bending conveying section 36 is configured such that the overlapping sheet PJ bends in the opposite direction to the bending direction of the first conveying path K1. Therefore, the overlapping sheet PJ bends alternately on one side of the sheet surface and the other side of the sheet surface, and the adsorption force is reduced in stages.

[0141] Here, as Figure 14 As shown in (A), in this embodiment, the bending conveying section 36 (conveyor mechanism) is configured such that the range N (width direction range of the clamping section) in the width direction (the direction orthogonal to the conveying direction indicated by the white arrow) accounts for more than 1 / 2 of the width direction range M of the overlapping sheet PJ with the maximum conveyable size (e.g., A4 lateral dimension).

[0142] In detail, the sheet peeling device 1 transports the sheet (overlapping sheet PJ or intermediate sheet PM) in all transport paths K1 to K5 in a manner that is consistent with the central position Z in the width direction of the sheet, regardless of the size of the sheet. Then, the bending transport section 36 is configured such that the central position of its clamping section in the width direction is approximately consistent with the central position Z in the width direction, and its width direction range N occupies more than 1 / 2 of the width direction range M of the largest overlapping sheet PJ.

[0143] This is because if the width range N is less than 1 / 2 of the width range M, it is difficult to achieve the function of reducing the adsorption force of the two sheets P1 and P2 by bending the overlapping sheet PJ through the bending conveyor 36.

[0144] In this embodiment, since the width direction range N is set to more than 1 / 2 of the width direction range M, the function of bending the overlapping sheet PJ by the bending conveyor 36 to reduce the adsorption force of the two sheets P1 and P2 can be fully utilized, and the effect of reducing the peeling defects of the overlapping sheet PJ can also be easily achieved.

[0145] In addition, in this embodiment, such as Figure 14 As shown in (B), the bending conveying section 36 (conveyor mechanism) can also be divided into multiple parts in the width direction. In this case, "division" refers to the division of the part of the conveyor mechanism that has the function of bending the overlapping sheet PJ.

[0146] As a specific example, in Figure 15In the curved conveyance section 36 shown in (B), three conveyance belts 36a are provided separately in the width direction, and sandwiching sections are formed between each of the conveyance belts 36a and the opposing rollers 36b. Then, even in the case where the curved conveyance section 36 is divided in the width direction as such, by setting the width direction range of the curved conveyance section 36 (in this case, the sum of the width direction ranges N1 to N3 of the three conveyance belts 36a) to be equal to or greater than 1 / 2 of the width direction range M of the superimposed sheet PJ, the function of bending the superimposed sheet PJ by the curved conveyance section 36 can be sufficiently exerted, and the effect of reducing peeling defects of the superimposed sheet PJ can also be easily exerted.

[0147] <Modification Example 1>

[0148] As shown in (A), the curved conveyance section 36 (conveyance mechanism) in Modification Example 1 is mainly composed of two roller members 36c, 36d that face each other at a position separated in the conveyance direction indicated by the white arrow (and the dotted arrow), and a press contact roller member 36e that is press-contacted with each of the two roller members 36c, 36d to form a sandwiching section that conveys the superimposed sheet PJ. The superimposed sheet PJ conveyed by the curved conveyance section 36 thus configured is bent in accordance with the curvature of the press contact roller member 36e. Figure 15

[0149] In addition, as shown in (B), the curved conveyance section 36 (conveyance mechanism) is mainly composed of a roller member 36g and a low-elasticity roller member 36f that is formed so as to have a lower surface elasticity (elasticity of the surface layer) than the roller member 36g, and is press-contacted with the roller member 36g to form a sandwiching section that conveys the superimposed sheet PJ. The superimposed sheet PJ conveyed by the curved conveyance section 36 thus configured is bent in accordance with the curvature of the roller member 36g. Figure 16 Even in the case where the curved conveyance section 36 thus configured is used, since the superimposed sheet PJ is bent by the curved conveyance section 36 in the conveyance path from the first supply tray 11 to the sheet peeling section 19, the suction force of the two sheets P1, P2 is weakened, and peeling defects of the superimposed sheet PJ in the sheet peeling section 19 are alleviated.

[0150] <Modification Example 2>

[0151] As shown in (A), the curved conveyance section 36 (conveyance mechanism) in Modification Example 2 is configured so that the superimposed sheet PJ is bent in the same direction as the bending direction of the superimposed sheet PJ with respect to the first conveyance path K1 (curved conveyance path), unlike the embodiment shown in (B).

[0152] Figure 16 Figure 17

[0153] ​​​​Therefore, the overlapping sheet PJ is bent on one side of the sheet face on one side, and the suction force is reduced at once.

[0154] Then, even in the case of using such a curved transport section 36, peeling failure of the overlapping sheet PJ in the sheet peeling section 19 can be alleviated.

[0155] <Modified Example 3>

[0156] Reference Figure 17 (A) in the sheet peeling apparatus 1 of Modified Example 3, the function of the first transport roller pair 4 provided on the upstream side in the transport direction with respect to the sheet peeling section 19 (winding roller 20) and the curved transport section 36 (transport mechanism) indicated by the white arrow in the transport direction is that of a second transport mechanism that transports the overlapping sheet PJ toward the sheet peeling section 19.

[0157] Then, in Modified Example 3, a speed difference is generated between the first transport speed VI (linear speed of the nip) of the curved transport section 36 (transport mechanism) and the second transport speed V2 (linear speed of the nip) of the first transport roller pair 4 (second transport mechanism).

[0158] Therefore, in a state in which the overlapping sheet PJ is gripped by the nips of both the curved transport section 36 and the first transport roller pair 4, the overlapping sheet PJ is forced in the transport direction and becomes easy to bend due to the above-described speed difference. Therefore, the function of reducing the suction force of the two sheets PI, P2 by bending the overlapping sheet PJ by the curved transport section 36 is more easily exerted.

[0159] In particular, in Modified Example 3, the transport speed (first transport speed VI of the curved transport section 36) provided on the downstream side in the transport direction is faster (VI > V2) than the transport speed (second transport speed V2 of the first transport roller pair 4) provided on the upstream side in the transport direction, among the curved transport section 36 (transport mechanism) and the first transport roller pair 4 (second transport mechanism). By so doing, in a state in which the overlapping sheet PJ is gripped by the nips of both the curved transport section 36 and the first transport roller pair 4, a force that stretches the overlapping sheet PJ in the transport direction is applied by the above-described speed difference, and the overlapping sheet PJ becomes easy to bend. Therefore, the function of reducing the suction force of the two sheets PI, P2 by bending the overlapping sheet PJ by the curved transport section 36 is more easily exerted.

[0160] Alternatively, the first conveying speed VI and the second conveying speed V2 can be controlled in a manner in which the magnitude relationship between the first conveying speed VI and the second conveying speed V2 is alternately reversed. Specifically, a drive mechanism that drives the curved conveying section 36 is provided separately from a drive mechanism that drives the other conveying roller pair, and the first conveying speed VI is made variable in a manner in which the first conveying speed VI is made larger or smaller than the second conveying speed V2 (a fixed value) in a state in which the superposed sheet PJ is gripped by the gripping sections of both the pair 4 and the curved conveying section 36. By so doing, in the state in which the superposed sheet PJ is gripped by the gripping sections of both the pair 4 and the curved conveying section 36, the superposed sheet PJ is alternately subjected to a force that stretches in the conveying direction and a force that contracts in the conveying direction by the speed difference that alternately changes in the above-described magnitude relationship, and thus becomes in a state in which it is easy to bend. Therefore, the function of reducing the suction force of the two sheets PI, P2 by bending the superposed sheet PJ by the curved conveying section 36 is more easily exerted.

[0161] In addition, as with the sheet peeling device 1 shown in (B) of Figure 18 , even if the second conveying roller pair 5 that is disposed on the conveying direction downstream side with respect to the sheet peeling section 19 (winding roller 20) and with respect to the curved conveying section 36 (conveying mechanism) and that functions as the second conveying mechanism is provided, by generating a speed difference between the first conveying speed VI of the curved conveying section 36 (conveying mechanism) and the second conveying speed V2 of the second conveying roller pair 5 (second conveying mechanism), the same effect can be obtained.

[0162] <Variant 4>

[0163] As shown in (A) of Figure 1 , a laminating treatment device 50 is built in as Variant 4. Figure 19 The sheet peeling device 1 shown in (B) of is built in the laminating treatment device 50.

[0164] Then, in the laminating treatment device 50, a laminating treatment section 51 is provided on the downstream side (forward direction downstream side) of the third conveying roller pair 6 of the sheet peeling device 1, and the superposed sheet PJ in a state in which the intermediate sheet PM is interposed between the two sheets PI, P2 peeled by the sheet peeling device 1 is subjected to laminating treatment.

[0165] In the laminating treatment section 51, a plurality of heat and pressure applying roller pairs that apply heat and pressure to the superposed sheet PJ in a state in which the intermediate sheet PM is interposed are provided while the superposed sheet PJ in the state in which the intermediate sheet PM is interposed is conveyed in the forward direction. The superposed sheet PJ after the laminating treatment section 51 is joined in a state in which the entire region is interposed with the intermediate sheet PM. Then, the superposed sheet PJ on which the laminating treatment is performed is discharged to the outside of the device by the discharge roller pair 7 and is placed on the discharge tray 13.

[0166] Thus, the lamination processing apparatus 50 in Modification Example 4 can improve user convenience by performing a series of actions, including the process of supplying sheets PJ and PM, the process of peeling off the two sheets P1 and P2 of the overlapping sheet PJ, the process of inserting the intermediate sheet PM between the two sheets P1 and P2 after peeling, and the process of laminating the overlapping sheet PJ with the intermediate sheet PM inserted.

[0167] In particular, when the front end face of the overlapping sheet P is damaged, it becomes difficult to laminate that part, so the configuration of the present invention becomes useful.

[0168] Then, in the lamination processing apparatus 50 of Modified Example 4, a bending conveying section 36 as a conveying mechanism is also provided, so that the two sheets P1 and P2 constituting the overlapping sheet PJ can be peeled off well.

[0169] <Variation Example 5>

[0170] like Figure 18 As shown, in Modification 5, the image forming apparatus 100 is provided with an image forming apparatus body that forms an image on sheet P. Figure 19 The lamination processing apparatus 50 shown.

[0171] Reference Figure 4 to Figure 7 In the image forming apparatus 100, firstly, the original document D is conveyed (supplied) from the original document table in the direction of the arrow in the figure by the conveying roller of the original document conveying device 110, and passes above the original document reading device 102. At this time, in the original document reading device 102, the image information of the original document D passing above it is optically read.

[0172] Then, the optical image information read by the original document reading device 102 is converted into electrical signals and sent to the writing device 103. Then, starting from the writing device 103, lasers based on the image information of its electrical signals are emitted in different colors onto each photosensitive drum 105Y, 105M, 105C, and 105K to perform the exposure process.

[0173] Then, charging, exposure, and development processes are performed on the photosensitive drums 105Y, 105M, 105C, and 105K of each imaging unit 104Y, 104M, 104C, and 104K, thereby forming the desired images on the photosensitive drums 105Y, 105M, 105C, and 105K respectively.

[0174] Then, the images formed on the photosensitive drums 105Y, 105M, 105C, 105K, respectively, are superimposed and transferred to the intermediate transfer belt 178 as a color image. Further, the color image formed on the intermediate transfer belt 178 is transferred to the sheet P (a sheet as an intermediate sheet PM) conveyed from the supply device 112 by the supply roller 197 at a position facing the 2nd transfer roller 189.

[0175] Then, the sheet P (the intermediate sheet PM) on which the color image is transferred is conveyed to a position of the fixing device 120. Then, the color image on the surface is fixed to the sheet P.

[0176] Then, the sheet P is discharged from the image forming apparatus main body 100 by the discharge roller pair 131 and is fed into the laminating processing device 50 as the intermediate sheet PM. At this time, in the laminating processing device 50 (the sheet peeling apparatus 1), the above-described process (the process of peeling the superimposed sheet PJ) explained with reference to the modification example 5 has been completed, and a process (the process of inserting the intermediate sheet PM into the superimposed sheet PJ) explained with reference to the modification example 5 is to be performed. Further, after the laminating processing of the superimposed sheet PJ into which the intermediate sheet PM is inserted is performed by the laminating processing section 51, the superimposed sheet PJ is discharged to the outside of the apparatus by the discharge roller pair 7 and is placed on the discharge tray 13. Figure 8 Figure 1

[0177] Thus, a series of image forming processing (printing operation) in the image forming apparatus 1 and a series of sheet peeling processing and laminating processing using the intermediate sheet PM on which the image is formed are completed.

[0178] In addition, in the modification example 5, the laminating processing device 50 is provided in the image forming apparatus 100, but the sheet peeling apparatus 1 illustrated in the modification example 1 can be provided in the image forming apparatus 100. Figure 20

[0179] In addition, in the modification example 5, although the present application is applied to the color image forming apparatus 100, the present application can be applied to a monochrome image forming apparatus. In addition, in the modification example 5, although the present application is applied to the electrophotographic image forming apparatus 100, the application of the present application is not limited to this, and the present application can be applied to other image forming apparatuses (for example, an inkjet image forming apparatus or a flexographic printing machine, etc.).

[0180] Then, in the laminating processing device 50 of the image forming apparatus 100 of the modification example 5, the curved conveying section 36 as the conveying mechanism is also provided, and thus the two sheets PI, P2 constituting the superimposed sheet PJ can be peeled well.​​​

[0181] <Modified example 6>

[0182] As shown in Figure 19 , the image forming apparatus 200 of the modified example 6 is detachably provided with the laminating processing apparatus 50 shown in Figure 18 , with respect to the image forming apparatus 100 shown in Figure 20 , which forms an image on the sheet P.

[0183] Referring to Figure 18 , in the image forming system 200, after the sheet P (the intermediate sheet PM on which the desired image is formed) discharged from the discharge roller pair 131 of the image forming apparatus 100 is fed into the laminating processing apparatus 50, the image forming processing explained above using Figure 1 , is similarly inserted into the superimposed sheet PJ, and then subjected to the laminating processing, and discharged through the discharge roller pair 7 to be placed on the discharge tray 13.

[0184] In addition, when the mode in which such laminating processing is not performed is selected, in the image forming system 200, the sheet P on which the image is formed by the image forming processing is discharged from the second discharge roller pair 132 of the image forming apparatus 100 to the outside of the apparatus, and is placed on the second discharge tray 150.

[0185] Here, the laminating processing apparatus 50 is provided to be detachable with respect to the image forming apparatus 100, and can be detached from the image forming apparatus 100 when the laminating processing apparatus 50 is not needed. Then, in the case where the laminating processing apparatus 50 is thus detached, the placement surface 149 on which the laminating processing apparatus 50 is placed serves as a discharge tray for placing the sheet P (the sheet P on which the desired image is formed) discharged from the discharge roller pair 131 to the outside of the apparatus.

[0186] In addition, in the modified example 6, the laminating processing apparatus 50 is detachably provided in the image forming system 200, but the sheet peeling apparatus 1 shown in ​ may also be detachably provided in the image forming system 200.

[0187] Then, the laminating processing apparatus 50 of the image forming system 200 of the modified example 5 is also provided with the curved conveying section 36 as the conveying mechanism, and thus the two sheets P1, P2 constituting the superimposed sheet PJ can be peeled off well.

[0188] In addition, the image forming system 200 of the modified example 6 is detachably provided with the laminating processing apparatus 50 in the space below the original conveying apparatus 110 formed in the image forming apparatus 100.

[0189] In this regard, as shown in (A) of FIG. 21, the image forming system 200 can also be configured such that the laminating device 50 is detachably provided on the side of the image forming apparatus 100 (on the side of the side on which the sheet P after image formation is discharged). In this case, in the laminating device 50, the first supply tray 11 on which the superposed sheet PJ is loaded can also be disposed at the uppermost portion, and the sheet peeling portion 19 (winding roller 20), the laminating processing portion 51, the discharge tray 13, and the like can be disposed in this order from the top downward. In addition, in the laminating device 50, in addition to the conveyance path for guiding the intermediate sheet PM discharged from the image forming apparatus 100 to the sheet peeling portion 19 (winding roller 20), a conveyance path (conveyance roller pair 58, 59) for discharging the sheet P discharged from the image forming apparatus 100 without performing laminating processing can also be provided.

[0190] In addition, a relay device 300 for guiding the sheet P (including the sheet that becomes the intermediate sheet PM) discharged from the image forming apparatus 100 to the laminating device 50 can also be provided. In this case, the image forming system 200 can also be configured such that the intermediate sheet PM can be conveyed from the relay device 300.

[0191] In addition, as shown in (B) of FIG. 21, for the sheet P (sheet on which laminating processing is not performed) discharged from the image forming apparatus 100 through the laminating device 50, a post-processing device 400 for performing post-processing such as punching processing or stapling processing can also be provided.

[0192] As described above, the sheet peeling device 1 in the present embodiment is provided with the sheet peeling portion 19 to peel the non-joined portion of the superposed sheet PJ in which the two sheets PI, P2 are joined at the joining portion A after being superposed. In addition, the bending conveyance portion 36 (conveyance mechanism) that bends the superposed sheet PJ in a direction intersecting the conveyance direction while conveying the superposed sheet PJ to the sheet peeling portion 19 is provided.

[0193] Thus, the two sheets PI, P2 that constitute the superposed sheet PJ can be peeled well.

[0194] Further, the present application is not limited to the present embodiment, and within the scope of the technical idea of the present application, the present embodiment can be appropriately changed other than the teachings of the present embodiment. In addition, the number, position, shape, and the like of the constituent members are not limited to the present embodiment, and appropriate number, position, shape, and the like can be selected when implementing the present application.

Claims

1. A sheet peeling device, characterized in that... include: The sheet peeling section peels off the non-jointing portion of the overlapping sheet formed by two overlapping sheets joined at the joint. A first conveying mechanism is disposed upstream of the sheet peeling section and configured to convey the overlapping sheet to the sheet peeling section while bending it in a direction intersecting the conveying direction. The first conveying mechanism is a bending conveying mechanism disposed in a curved conveying path and configured to cause the overlapping sheet to bend in the opposite direction to the bending direction of the conveying path. A second conveying mechanism is disposed upstream of the sheet peeling section in the conveying direction of the overlapping sheet and upstream of the first conveying mechanism in the conveying direction of the overlapping sheet. The second conveying mechanism is configured to convey the overlapping sheet to the sheet peeling section.

2. The sheet peeling device according to claim 1, characterized in that: The first conveying mechanism has a belt component and a roller component, the roller component being pressed against the belt surface of the belt component to form a clamping portion for conveying the overlapping sheets.

3. The sheet peeling device according to claim 1, characterized in that: The first conveying mechanism has two roller components facing each other on one side of the overlapping sheet at separate positions in the conveying direction, and a pressing roller component pressing against the two roller components to form a clamping portion for conveying the overlapping sheet.

4. The sheet peeling device according to claim 1, characterized in that: The first conveying mechanism includes a roller component and a low-elasticity roller component. The low-elasticity roller component is formed in a manner that its surface elasticity is lower than that of the roller component, and it is also pressed with the roller component to form a clamping portion for conveying the overlapping sheet.

5. The sheet peeling device according to any one of claims 1 to 4, characterized in that: The width direction of the first conveying mechanism, which is orthogonal to the conveying direction, accounts for more than 1 / 2 of the width direction of the overlapping sheet of the largest conveyable size.

6. The sheet peeling device according to any one of claims 1 to 4, characterized in that: The first conveying mechanism is divided into multiple parts in a width direction orthogonal to the conveying direction.

7. The sheet peeling device according to any one of claims 1 to 4, characterized in that: The system includes a third conveying mechanism for conveying the overlapping sheets to the sheet peeling section. This third conveying mechanism is positioned upstream of the sheet peeling section in the conveying direction and downstream of the first conveying mechanism in the conveying direction. A speed difference is generated between the first conveying speed of the first conveying mechanism and the second conveying speed of the third conveying mechanism.

8. The sheet peeling device according to claim 7, characterized in that: The second conveying speed of the third conveying mechanism is faster than the first conveying speed of the first conveying mechanism.

9. A sheet peeling device, characterized in that... include: The sheet peeling section peels off the non-jointing portion of the overlapping sheet formed by two overlapping sheets joined at the joint. A first conveying mechanism is configured to convey the overlapping sheet to the sheet peeling section while bending it in a direction intersecting the conveying direction. and A second conveying mechanism is disposed upstream of the sheet peeling section in the conveying direction of the overlapping sheet and upstream or downstream of the first conveying mechanism in the conveying direction of the overlapping sheet. The second conveying mechanism is configured to convey the overlapping sheet to the sheet peeling section. The magnitudes of the first conveying speed of the first conveying mechanism and the second conveying speed of the second conveying mechanism alternately reverse.

10. The sheet peeling device according to claim 9, characterized in that: The conveying mechanism is arranged in a curved conveying path.

11. The sheet peeling apparatus according to any one of claims 9 to 10, characterized in that: It has a pair of conveyor rollers for conveying the overlapping sheets to the sheet peeling section. The sheet peeling section has a winding roller that rotates in a predetermined rotational direction and winds the overlapping sheet, and peeling claws inserted between the winding roller and the pair of conveying rollers, forming a gap between the two sheets. Simultaneously, a peeling process is performed to peel off the non-jointed portion of the overlapping sheet, and an insertion process is performed to insert the intermediate sheet between the two sheets in the peeled state.

12. A lamination processing apparatus, characterized in that... include: The sheet peeling device according to any one of claims 1 to 11, and The lamination process unit performs lamination processing on the overlapping sheet in a state where an intermediate sheet is inserted between the two sheets peeled off by the sheet peeling device.

13. An image forming apparatus, characterized in that... include: The sheet peeling apparatus according to any one of claims 1 to 11, or the lamination processing apparatus according to claim 12, and The main body of an image forming apparatus that forms an image on a sheet.

14. An image forming system, characterized in that: The sheet peeling apparatus according to any one of claims 1 to 11, or the lamination processing apparatus according to claim 12, is configured to be detachable from the image forming apparatus for forming an image on the sheet.

Images