JP3613116B2 - Finisher of image forming machine - Google Patents

Finisher of image forming machine Download PDF

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Publication number
JP3613116B2
JP3613116B2 JP2000042688A JP2000042688A JP3613116B2 JP 3613116 B2 JP3613116 B2 JP 3613116B2 JP 2000042688 A JP2000042688 A JP 2000042688A JP 2000042688 A JP2000042688 A JP 2000042688A JP 3613116 B2 JP3613116 B2 JP 3613116B2
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Japan
Prior art keywords
spring
driven roller
disposed
paper
pressing
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JP2000042688A
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Japanese (ja)
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JP2001233539A (en
Inventor
啓二 奥村
芳雄 杉島
貞博 松浦
勝彦 花本
一寿 近藤
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京セラミタ株式会社
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet post-processing on a sheet bundle formed by being loaded into an image forming machine main body such as an electrostatic copying machine or a printer and carried in from the image forming machine main body, specifically, a sorting process, a stapling process. The present invention relates to a finisher of an image forming machine that performs sheet post-processing such as punching and then discharges it to a sorting discharge tray.
[0002]
[Prior art]
A finisher of an image forming machine that is attached to an image forming machine main body and ejects after a stapling process is performed on a sheet bundle formed by being carried in from the image forming machine main body is disclosed in, for example, Japanese Patent Laid-Open No. 11-263520. Has been. The finisher disclosed in the publication includes a paper tray, an intermediate transport path for transporting the paper carried from the image forming machine main body toward the paper tray, and a paper receiver for receiving the paper transported through the intermediate transport path. A plurality of carry-in means for selectively carrying into the table, a receiving member capable of receiving and stocking one end of the paper selectively carried into the paper receiving table by the carry-in means, and stock received by the receiving member And a sheet moving means capable of moving the sheet bundle formed as a result toward the sorting discharge tray. A sort discharge path is disposed between the paper tray and the sort discharge tray. The paper receiving tray is disposed so as to extend obliquely upward from below toward the sorting discharge roller pair at a position lower than the sorting discharge roller pair disposed on the upstream side of the sorting discharge tray. . The sorting discharge tray is disposed so as to be moved up and down by a lifting means. The finisher is also provided with alignment means for aligning the sheets on the sheet receiving tray in the width direction. The sheet moving means includes a belt mechanism including an endless belt, and a receiving member is attached to the endless belt so as to move integrally therewith. A stapler, which is a sheet post-processing means, is disposed at the lower end of the sheet receiving tray.
[0003]
A plurality of types of sheets having different lengths in the transport direction are selectively transported to the intermediate transport path. The carry-in means is disposed at a plurality of positions along the intermediate conveyance path so that a plurality of types of sheets having different lengths in the conveyance direction are selectively carried into the sheet receiving tray from a plurality of positions on the intermediate conveyance path. ing. A plurality of cradle carry-in roller pairs are arranged at intervals in the conveyance direction on the intermediate conveyance path. The carry-in means is arranged downstream of one of the cradle carry-in roller pair and one of the cradle carry-in roller pair, and guides the sheet conveyed by one of the cradle carry-in roller pair along the intermediate conveyance path. Movable guide means that is selectively positioned at a first guide position that guides toward the paper tray and a second guide position that guides toward the paper receiving tray. A pair of cradle carry-in rollers disposed on the pedestal and a sheet conveyed by the pair of cradle carry-in rollers toward the most downstream end of the paper cradle. It is comprised from the guide part which guides so that it may carry in.
[0004]
When the stapling process mode is set in the image forming machine main body, the paper to be subjected to the stapling process carried in from the image forming machine main body is transferred to the paper in the intermediate conveyance path by a carry-in means at a position corresponding to the conveyance direction length. It is brought into the cradle. One end of the sheet carried into the sheet receiving tray is received by the receiving member and stocked. Each time the sheet is received by the receiving member and stocked, alignment in the width direction is performed by the alignment means. When the above operation is repeated and a predetermined number of sheets to be stapled on the sheet receiving tray are stocked as sheets in the receiving member, the stapler performs the stapling process. After the stapling process is performed, the belt mechanism of the sheet moving unit is driven, and the stapled sheet bundle is moved by the receiving member along the sheet receiving plate toward the sorting discharge roller pair to be discharged for sorting. The paper is discharged onto a sorting discharge tray by a pair of rollers. When a non-staple processing mode is set in the image forming machine main body, for example, a mere sort processing mode is set, the paper to be subjected to the sorting process carried in from the image forming machine main body is the same as when the staple processing mode is set. Thus, a predetermined number of sheets to be sorted on the sheet receiving tray are stocked as a sheet bundle on the receiving member. The sheet bundle stocked on the receiving member is moved toward the sorting discharge roller pair in a non-staple state as described above, and is discharged onto the sorting discharge tray by the sorting discharge roller pair.
[0005]
In the finisher of the conventional image forming machine, the sheet bundle stocked as a sheet bundle on the receiving member of the sheet receiving tray is a common sheet regardless of whether it is a stapled sheet bundle or a non-staple sheet bundle. The paper is discharged onto the sort discharge tray by the sort discharge roller pair. Although not described in this publication, generally, the sorting discharge roller pair is composed of a driven roller and a driven roller. The driven roller is disposed on the lower side and the driven roller is disposed on the upper side. The driven rollers of the sort discharge roller pair are drivingly connected to the electric motor through the clutch means, and are driven and released by turning the clutch means on and off. The driven roller is rotated when the driven roller is driven to rotate.
[0006]
As described above, the sheet receiving tray extends downward from the sorting discharge roller pair disposed on the upstream side of the sorting discharge tray so as to incline upward from the lower side toward the sorting discharge roller pair. It is arranged to exist. The sort discharge tray is disposed at a position that is biased to the side of the finisher opposite to the side facing the main body of the image forming machine with respect to the extension line of the paper cradle. It is formed so as to bend and extend from the paper tray side toward the sorting discharge tray. Since the sorting discharge roller pair is disposed between the sorting discharge tray and the substantially downstream end of the sorting discharge path, the bottom surface is contacted and supported when the sheet bundle passes through the sorting discharge roller pair. Further, with the partial region facing upward of the outer peripheral surface of the driven roller as a fulcrum, the sheet bundle is curved so that the upstream side and the downstream side in the conveyance direction hang downward.
[0007]
[Problems to be solved by the invention]
When a non-staple paper bundle (paper bundle to be sorted) is discharged by the sorting discharge roller pair, the paper bundle is bent as described above, and the lower surface side of the paper bundle is contacted and supported. If only the driven roller of the pair of discharge rollers is driven and the pressing force of the driven roller against the driven roller is weaker than a predetermined value, the lower sheet among the sheets constituting the sheet bundle The upper sheet slips in the conveyance direction at the nip portion of the driven roller and the driven roller, and the so-called scattering occurs. As a result, alignment failure occurs in the transport direction in a state where the sheet bundle is discharged to the sorting discharge tray.
[0008]
In order to solve such a problem, generally, a pressing device that constantly presses the driven roller against the driven roller is provided. This pressing device includes spring means for constantly pressing the driven roller against the driven roller. The thickness of one set of sheet bundles that can be post-processed, that is, the number of sheets, is set within an allowable range according to the finisher (for example, 2 to 50 sheets). The pressing force, that is, the nip force, needs to be set to such a strength that the above-mentioned slip does not occur even when the sheet bundle having the maximum thickness is discharged. As a result, the nip force of the nip portion of the driven roller and the driven roller is strengthened, and the above-described slippage, that is, the deviation between the sheets can be prevented even though only the driven roller is driven. On the other hand, when the sheet bundle is curved, a deviation in the transport direction is generated between all sheets due to the difference in radius of the curved portion. Since this deviation forms a free end where the both ends of the sheet bundle are not substantially constrained, the deviation is allowed on both sides of the conveyance direction with the nip portion of the driven roller and the driven roller as a boundary, and is discharged to the sorting discharge tray and straight. By being restored to the state, it is naturally resolved and does not substantially cause misalignment.
[0009]
In the case where the nip force of the driven roller of the pair of sorting discharge rollers with respect to the driven roller is enhanced so as to satisfy all the consistency of the non-staple sheet bundle regardless of its thickness, one end portion is stapled. When the sheet bundle is discharged by the sorting discharge roller pair, the above-described deviation between the sheets can be prevented even though only the driven roller is driven. On the other hand, when the sheet bundle is curved, a deviation in the transport direction occurs between all the sheets as described above. However, one end of the sheet bundle is stapled and is restrained so that relative movement between the sheets is not allowed. As a result, when the sheet bundle is bent, each of the sheets tends to move relatively from one end where the relative movement is constrained toward the other end which forms a free end which is not constrained. However, since the nip force of the nip portion of the driven roller and the driven roller is strengthened to prevent slippage between sheets in the non-staple sheet bundle as described above, it is not restrained from one end that is restrained. The relative movement between the sheets toward the other end forming the free end is blocked at the nip portion, and is prevented from moving beyond the nip portion toward the other end. As a result, the relative movement is forced between the nip portion and the constrained one end portion of the sheet bundle, and the sheet may be damaged at the stapling portion or the sheet may be damaged, for example, the sheet may be damaged. There is.
[0010]
SUMMARY OF THE INVENTION An object of the present invention is to provide a novel image forming apparatus capable of ensuring the consistency of a bundle of sheets discharged to a sorting discharge tray and preventing damage of sheets regardless of whether they are stapled or non-staple. Is to provide a finisher.
[0011]
Another object of the present invention is to make it possible to change the nip pressure of the sorting discharge roller pair corresponding to stapling or non-stapling and discharged to the sorting discharging tray regardless of whether stapling or non-stapling. It is an object of the present invention to provide a novel finisher for an image forming machine that makes it possible to ensure consistency of a bundle of sheets and prevent damage to sheets.
[0012]
[Means for Solving the Problems]
According to the present invention, a paper receiving tray, a receiving means capable of receiving and temporarily stocking one end of the paper carried into the paper receiving tray, and a bundle of paper received and stocked by the receiving means. A sheet moving means for moving toward the sorting discharge tray, a sorting discharge path disposed between the sheet receiving tray and the sorting discharge tray, and a driven roller driven by the sorting discharge path A sorting discharge roller pair including a roller, a pressing device that presses the driven roller against the driven roller, and a stapler disposed on the side opposite to the side adjacent to the sorting discharge path of the paper tray, In the finisher of the image forming machine including the first spring means for constantly pressing the driven roller against the driven roller,
The pressing device cooperates with the first spring means to be capable of pressing the driven roller against the driven roller, and selectively pressurizes the second spring means to turn the driven roller into the driven roller. Pressure means for selectively pressing in cooperation with one spring meansOnly,
Control means for controlling the pressing device is provided. When the staple processing mode is set, the control means controls the pressurizing means so as not to pressurize the second spring means, and the driven roller is controlled only by the first spring means. When the driven roller is pressed and a processing mode other than the stapling processing mode is set, the pressing means is controlled to pressurize the second spring means, and the driven roller is driven by the first spring means and the second spring means. To the driven roller,
An image forming machine finisher is provided.
[0013]
SeoThe discharge path for the gate is composed of a stationary guide member and a movable guide member that is disposed so as to face the stationary guide member with a space therebetween and that is swingably disposed with one end portion as a swing center. A follower roller is rotatably disposed on the movable guide member, and a stationary support frame is disposed on the opposite side of the movable guide member opposite to the side facing the stationary guide member so as to face the stationary guide member. The first spring means is disposed between the frame and the movable guide member, the second spring means is disposed on the movable guide member, and the first spring means swings the movable guide member about the swing center. It is preferable that the driven roller is always pressed against the driven roller by constantly forcing the pressure roller, and the pressing means is arranged on the stationary support frame so as to selectively press the second spring means.. MaFurther, it is preferable that the one spring means is composed of a compression coil spring. Furthermore, the pressurizing means includes a pressurizing member disposed on the stationary support frame and a drive source for operating the pressurizing member, and the pressurizing member pressurizes the second spring means by the drive source. A pressing position in which the second spring means forces the movable guide member to swing about the swing center and the driven roller acts against the driven roller by the first spring means and the second spring means; It is preferable that the second spring means is selectively moved between a non-pressurized position where the pressure of the second spring means is released. Furthermore, the second spring means is constituted by a compression coil spring, one end of the compression coil spring is brought into contact with the movable guide member, and the other end is brought into contact with a movable retainer disposed movably on the movable guide member. The movable retainer is movable between a set position positioned by the spring force of the compression coil spring and a spring compression position obtained by compressing the compression coil spring from the set position, and the pressure member is positioned at the pressure position. The movable retainer is forcibly moved from the set position to the spring compression position by the pressure member, and when the pressure member is positioned at the non-pressure position, the movable retainer is returned from the spring compression position to the set position by the compression coil spring. Is preferable. Furthermore, the movable retainer is positioned so that at least a part thereof protrudes upward from the upper surface of the movable guide member while being positioned at the set position, and the pressurizing member is supported so as to be swingable along the stationary support frame. The drive source is composed of a solenoid supported by a stationary support frame and drivingly connected to a pressure member. When the solenoid is OFF, the pressure member is positioned at a non-pressure position and the movable retainer is set at the set position. When the solenoid is turned on, the pressure member is swung from the non-pressure position to the pressure position, and the movable retainer is pushed downward from the upper surface side of the movable guide member to spring from the set position. It is preferably located in the compressed position.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of a finisher of an image forming machine configured according to the present invention will be described below in more detail with reference to the accompanying drawings.
[0015]
Referring to FIG. 1, reference numeral 100 denotes an electrostatic copying machine which is an image forming machine, and the copying machine 100 includes a copying machine body 102 which is a rectangular parallelepiped image forming machine body (in FIG. 1). Only a part of it is shown). A sheet discharge port is formed at one side of the copying machine main body 102, and a sheet discharge roller pair 104 is disposed immediately upstream of the sheet discharge port. The copying machine 100 itself may use a well-known configuration, and since the configuration itself does not form a feature of the present invention, description thereof is omitted. An embodiment of the finisher 2 according to the present invention is attached adjacent to the one side portion of the copying machine main body 102.
[0016]
The finisher 2 includes a rectangular parallelepiped housing 4. A paper carry-in port 6 is provided at a position of the housing 4 facing one side of the copying machine main body 102 and facing the paper discharge port. The paper carry-in port 6 is constituted by a pair of guide plates that are arranged so as to face each other at an interval in the vertical direction and are opened up and down toward the paper discharge port of the copying machine main body 102. A first paper transport path 8 extending from the paper carry-in entrance 6 toward the other side of the housing 4 is disposed in the housing 4. In the housing 4, a second paper transport path 10 that branches from the first paper transport path 8 and extends toward a paper receiving tray 20 described later is disposed. A branching claw 12 is disposed at a branching portion between the first sheet transport path 8 and the second sheet transport path 10. Conveying roller means 14 is disposed at the branching portion in the first sheet conveying path 8. A non-sort discharge roller pair 16 is disposed at the downstream end (discharge end) of the first sheet conveyance path 8. A non-sort discharge tray 18 is mounted on the other side, which is the discharge side of the housing 4, and is arranged so as to receive and store paper discharged by the non-sort discharge roller pair 16.
[0017]
The branch claw 12 is configured to be operated by a solenoid (not shown) to a first position (not shown) and a second position shown by a solid line in FIG. In a state where the solenoid is OFF, the branching claw 12 is positioned at a first position (not shown), and the paper carried in from the paper carry-in port 6 passes through the first paper carrying path 8 by the carrying roller means 14 and is used for non-sorting. It is conveyed toward the discharge roller pair 16. When the solenoid is turned on, the branching claw 12 is positioned at the second position indicated by the solid line in FIG. 1, and the paper carried in from the paper carry-in port 6 is fed by the transport roller means 14 to the first paper transport path 8. Is conveyed toward the second paper conveyance path 10 from the branch portion. Between the paper carry-in entrance 6 in the first paper conveyance path 8 and the branch portion of the second paper conveyance path 10, a punch processing means 19 as a paper post-processing means is disposed. Note that a sheet detection switch SW1 for detecting a sheet to be carried in is disposed at a position immediately downstream of the sheet carry-in entrance 6 in the first sheet conveyance path 8.
[0018]
In the housing 4, a paper tray 20 is disposed so as to extend in a vertical direction. The surface of the paper tray 20 is disposed so as to be inclined in the vertical direction and extend substantially linearly. A sort discharge path 22 is disposed above the sheet receiving tray 20 from the bottom to the top, and a sort discharge roller pair 24 is disposed at the downstream end of the sort discharge path 22. On the upstream side of the sorting discharge roller pair 24 in the sorting discharge path 22, a sheet bundle detection switch SW2 for detecting discharge of the sheet bundle discharged from the sheet receiving tray 20 is disposed. A sorting discharge tray 26 is disposed on the other side, which is the discharge side of the housing 4, and is arranged so as to receive and store sheets discharged by the pair of sorting discharge rollers 24. The sort discharge tray 26 is provided so as to be raised and lowered by a lifting / lowering means (not shown), and is lowered by a predetermined amount each time a sheet bundle that has undergone post-processing is discharged. As is apparent from the above description, the paper receiving tray 20 is located above the sorting discharge roller pair 24 disposed on the upstream side of the sorting discharge tray 26 from above and toward the sorting discharge roller pair 24. It is arrange | positioned so that it may incline and extend. The sorting discharge tray 26 is disposed at a position that is biased to the side of the finisher 2 opposite to the side facing the copying machine main body 102 with respect to the extension line on the upper surface of the paper receiving tray 20. The discharge path 22 is formed so as to be curved and extend from the sheet receiving tray 20 side toward the sort discharge tray 26.
[0019]
The second paper transport path 10 is curved downward from the branching portion, and then is inclined substantially parallel to the surface of the paper receiving tray 20 with an interval from the upper side to the lower side. Are arranged to extend. The second paper transport path 10 is provided with a plurality of carry-in means for carrying the paper transported through the second paper transport path 10 toward the paper receiving tray 20. The copying machine 100 is configured to be capable of copying a plurality of types of sheets having different lengths (sizes) in the conveyance direction. Accordingly, a plurality of types of sheets having different lengths in the conveyance direction are selectively returned to the second sheet conveyance path 10, and the sheets are received from a plurality of positions corresponding to the plurality of types of sheets having different lengths in the conveyance direction. Loading means are disposed at a plurality of positions so as to be selectively loaded toward the vehicle. In the embodiment shown in FIG. 1, a sheet conveyed through the second sheet conveyance path 10 is a sheet of A3 size in JIS (hereinafter simply referred to as “A3 portrait”) conveyed in the vertical direction, B4 size paper (hereinafter simply referred to as “B4 length”) to be conveyed, A4 size paper (hereinafter simply referred to as “A4 length”) to be carried in the vertical direction, and A4 to be carried in the horizontal direction. There are four types of size paper (hereinafter simply referred to as “A4 landscape”), and therefore, the four loading means 30, 32, 34 and 36 are arranged at four different positions, respectively.
[0020]
In a region of the second paper conveyance path 10 that extends substantially parallel to the surface of the paper receiving tray 20 at intervals, a plurality of carry-in roller pairs, in this embodiment, four carry-in roller pairs 30A and 32A. , 34A and 36A are arranged at intervals in the transport direction. Each of the carry-in roller pairs 30A, 32A, 34A, and 36A is composed of a driven roller and a driven roller that is brought into pressure contact with the driven roller. The carry-in means 30 includes a carry-in roller pair 30A located at the most upstream of the carry roller pairs arranged in the second paper carry path 10, and a movable guide member 31 arranged downstream of the carry-in roller pair 30A. ing. The carry-in means 32 includes a carry-in roller pair 32A disposed downstream of the carry-in roller pair 30A and a movable guide member 33 disposed downstream of the carry-in roller pair 32A. The carry-in means 34 includes a carry-in roller pair 34A disposed downstream of the carry-in roller pair 32A and a movable guide member 35 disposed downstream of the carry-in roller pair 34A. The carry-in means 36 includes a carry-in roller pair 36A disposed downstream of the carry-in roller pair 34A, and a stationary guide portion 37 disposed downstream of the carry-in roller pair 36A. Each of the movable guide members 31, 33, and 35 guides a sheet conveyed by the carry-in roller pair 30A, 32A, and 34A along the second sheet conveyance path 10 (indicated by a solid line in FIG. 1). Position) and a second guide position (a branch position indicated by a two-dot chain line in FIG. 1) that branches from the second paper transport path 10 and guides it toward the paper cradle 20. It is comprised so that it may be selectively positioned by.
[0021]
When the A3 vertical transported through the second paper transport path 10 is branched from the second paper transport path 10 and carried into the paper receiving tray 20, the movable guide member 31 of the carry-in means 30 at the most upstream position is moved to the second position. Positioned at the guide position (the other movable guide members 33 and 35 are held in a state positioned at the first guide position). Similarly, when the B4 portrait is carried into the paper tray 20, the movable guide member 33 of the carry-in means 32 is positioned at the second guide position (the other movable guide members 31 and 35 are positioned at the first guide position). Retained). When the A4 portrait is to be carried into the paper tray 20, the movable guide member 35 of the carry-in means 34 is positioned at the second guide position (the other movable guide members 31 and 33 are held at the first guide position). ) Further, when the A4 side is carried into the paper receiving tray 20 through the carrying-in means 36, all of the movable guide members 31, 33 and 35 may be held in the state where they are positioned at the first guide position. With the above-described configuration and operation, the paper received in the paper receiving tray 20 is prevented from being caught. It is also possible to carry B5 size paper conveyed in the vertical direction to the paper receiving tray 20 through the carrying-in means 36, also serving as A4 landscape. Similarly, it is also possible to carry a paper having a size different from the above-mentioned size into the paper receiving tray 20 through any of the carrying-in means.
[0022]
The paper tray 20 has a length and a width in the longitudinal direction that can receive a plurality of types of papers having different lengths in the transport direction. In this embodiment, the sheet has a length and a width in the longitudinal direction that can accept the four types of sheets of A3 portrait, B4 portrait, A4 portrait, and A4 landscape. The finisher 2 also includes a receiving member 38 that is a receiving means that can receive and stock one end of the paper that is selectively carried into the paper receiving tray 20 by any of the carrying-in means 30, 32, 34, and 36. A sheet moving means 40 capable of moving the sheet bundle received and stocked by the stop member 38 toward the sorting discharge roller pair 24 and thus toward the sorting discharge tray 26 is provided. The sheet moving means 40 includes a driving pulley 42 and a driven pulley 43 that are spaced apart from each other in the longitudinal direction of the sheet receiving base 20, and an endless belt 44 that is wound between the driving pulley 42 and the driven pulley 43. Yes. The endless belt 44 has a linear moving portion that linearly extends between the driving pulley 42 and the driven pulley 43, and this linear moving portion extends in the longitudinal direction of the paper receiving tray 20 along the back surface of the paper receiving tray 20. Existing and can be moved in the same direction. The drive pulley 42 is drivingly connected to an electric motor (not shown) via an electromagnetic clutch (not shown). When the electromagnetic clutch is turned on and the drive pulley 42 is rotationally driven, the endless belt 44 is rotationally driven counterclockwise in FIG. 1, and the linear moving portion of the endless belt 44 is in the longitudinal direction of the paper tray 20. It is moved from one side toward the sorting discharge tray 26.
[0023]
More specifically, a pair of the drive pulley 42 and the driven pulley 43 are disposed at a central portion in the width direction (front and back direction in FIG. 1) of the paper receiving tray 20 with a space therebetween. An endless belt 44 is wound therebetween. The receiving member 38 is integrally attached to the pair of endless belts 44 so as to straddle them. As shown in FIG. 1, the receiving member 38 is formed with an L-shaped portion that is substantially L-shaped when viewed in the width direction of the paper receiving tray 20, and is positioned at the linear moving portion of the endless belt 44. In this case, the sheet receiving portion is positioned so as to protrude from the surface of the sheet receiving base 20 (the surface on the side where the sheet is received) and is substantially channel-shaped between the surface of the sheet receiving stand 20 when viewed from the width direction. The stop portion 39 is formed so as to extend in the width direction of the paper tray 20. The width of each of the receiving members 38 (the width in the same direction as the width of the paper receiving tray 20) is defined as a length that can receive and stock one end of each size of paper. Since each of the endless belts 44 is disposed at an interval in the central portion in the width direction of the paper tray 20, the receiving member 38 interferes with the paper tray 20 in the central portion in the width direction of the paper tray 20. A moving space (not shown) is provided so as to be able to move in the longitudinal direction without doing so. In this movement space, the paper cradle 20 is composed of two plate members, and each plate member is arranged at an interval in the width direction, or a notch corresponding to the movement space is formed on one plate member. It is formed by forming. When each endless belt 44 is rotated once by an electric motor (not shown), the receiving member 38 is returned to the home position. The finisher 2 is also provided with a stapler 46 that is a sheet post-processing means. The stapler 46 is disposed at the end (the lower end in FIG. 1) of the sheet receiving base 20 opposite to the side adjacent to the sorting discharge path 22. The receiving position (home position) of the receiving member 38 is defined to coincide with the post-processing position where the post-processing by the stapler 46 is performed.
[0024]
On the back side of the paper tray 20, paper alignment means is provided. The aligning means includes a pair of width aligning plates 48 positioned at an interval in the width direction of the paper tray 20 and a not-shown width aligning mechanism for reciprocating the pair of width aligning plates 48 in the width direction. I have. The pair of width aligning plates 48 are disposed so as to reciprocate in the width direction along the surface of the paper receiving tray 20. The width adjusting mechanism is disposed so as to be able to reciprocate independently from each other in the width direction corresponding to each of the width adjusting plates 48, and to engage with the rack of each moving body. There are provided pinion gears and electric motors as drive sources arranged corresponding to the respective pinion gears so that each of the pinion gears can be driven to rotate independently of each other. Each of the electric motors can be rotated forward and backward. Each of the width adjusting plates 48 is attached to a corresponding moving body and is moved in the width direction integrally with them. The width adjusting mechanism is provided with a home position detector (not shown) for detecting the home position of each width adjusting plate 48 corresponding to each width adjusting plate 48. Each of the electric motors is equipped with a rotation amount detector such as a rotary encoder or a frequency generator, and the movement amount of the width adjusting plate 48 corresponding to the paper size is defined by these detection signals.
[0025]
1 to 5, the finisher 2 includes a pair of side plates 2 a and 2 b. The side plate 2a is disposed on the front side of the finisher 2 (the front side of the paper surface in FIG. 1), and the side plate 2b is opposed to the rear side of the finisher 2 (the back side of the paper surface in FIG. 1) parallel to the side plate 2a with a gap therebetween. And it arrange | positions so that it may stand upright in a perpendicular direction. The sorting discharge roller pair 24 includes a driven roller 24a and a driven roller 24b. A plurality of driven rollers 24a are fixed to the rotating shaft 25 at intervals in the axial direction. The rotary shaft 25 is rotatably supported on the side plates 2a and 2b via a bearing (not shown). The rotary shaft 25 is drivingly connected to an electric motor (not shown) via a power transmission means (not shown). The power transmission means includes an electromagnetic clutch. When the electromagnetic clutch is turned on, the driven roller 24a is driven to rotate via the rotary shaft 25.
[0026]
The sorting discharge path 22 includes a stationary guide plate 49 that is a stationary guide member, and a movable guide plate 50 that is a movable guide member that is disposed so as to face the stationary guide plate 49 with an interval therebetween. ing. The stationary guide plate 49 is not clearly illustrated, but is formed in a substantially rectangular shape as a whole, and the side plate is provided with flanges 49a formed at both ends in the longitudinal direction, that is, the front-rear direction (the front and back direction in FIG. 1). 2a and 2b are fixed and supported by screws (not shown). The stationary guide plate 49, which can be integrally formed from an appropriate metal plate or synthetic resin plate, is inclined upward from the upstream end in the conveyance direction of the sheet bundle toward the downstream direction while being supported by the side plates 2a and 2b. After extending in a substantially straight line, it is formed so as to be bent slightly gently downward and then toward the driven roller 24a (see FIGS. 4 and 5).
[0027]
The movable guide plate 50 has a substantially rectangular shape as a whole, and an upright flange is formed on the upper surface of the peripheral edge thereof. Note that other upright flanges are formed in a substantially lattice shape on the entire upper surface of the movable guide plate 50 in order to ensure the strength thereof, but the illustration is omitted for the sake of simplification of the drawing. The movable guide plate 50, which can be integrally formed from an appropriate synthetic resin, is swingably disposed on the side plates 2a and 2b via support shafts 51 in the longitudinal direction, that is, both ends in the front-rear direction. Each of the support shafts 51 is disposed on a common axis and forms the swing center of the movable guide plate 50. When the movable guide plate 50 is supported by the side plates 2a and 2b, the movable guide plate 50 inclines upward from the upstream end in the transport direction toward the downstream direction and extends substantially linearly, and then moves slightly downward in the central portion in the transport direction. Thus, it is formed so as to be curved relatively gently and then toward the sorting discharge path 18 (see FIGS. 4 and 5). A pair of driven rollers 24b are rotatably disposed at the end of the movable guide plate 50 on the downstream side in the transport direction. Each of the driven rollers 24b is rotatably supported on the rotating shaft 27 with an interval in the axial direction. Each mounting position of the driven roller 24b is defined so as to be aligned with two mounting positions of the driven roller 24a. The rotary shaft 27 is fixed to and supported by a fixing means (not shown) at the end of the movable guide plate 50 on the downstream side in the transport direction and at the center in the longitudinal direction (the front-rear direction) of the movable guide plate 50. A through hole 52 for avoiding interference with each driven roller 24b is formed in a portion of the movable guide plate 50 where each driven roller 24b is located (see FIG. 2).
[0028]
On the side of the movable guide plate 50 opposite to the side facing the stationary guide plate 49, that is, on the upper surface side, a stationary support frame 54 is disposed so as to face the upper side with a gap therebetween. The stationary support frame 54, which can be integrally formed from an appropriate metal plate, has a substantially rectangular shape as a whole, and an upright flange is formed on the upper surface of the periphery. The stationary support frame 54 is fixed and supported to the side plates 2a and 2b by screws 55 through flanges formed in the longitudinal direction (the front-rear direction).
[0029]
The finisher 2 is provided with a pressing device for pressing the driven roller 24b against the driven roller 24a. The pressing device cooperates with each of the first compression coil spring 56 and the pair of first compression coil springs 56 which are first spring means for constantly pressing the driven roller 24b against the driven roller 24a, and the driven roller 24b. A pair of second compression coil springs 58 as second spring means that can be pressed by the driving roller 24a are provided. Each of the first compression coil springs 56 is disposed between the stationary support frame 54 and the movable guide plate 50, and each of the second compression coil springs 58 is disposed on the movable guide plate 50. More specifically, spring positioning protrusions 59 having a circular outer peripheral surface are formed so as to protrude downward from the lower surface at both ends in the longitudinal direction of the stationary support frame 54 and at the downstream end in the transport direction. ing. On the other hand, spring positioning protrusions 60 having a circular outer peripheral surface are formed so as to protrude upward from the upper surface at both ends in the longitudinal direction of the movable guide plate 50 and at the center in the transport direction. Each of the spring positioning protrusions 59 of the stationary support frame 54 and each of the spring positioning protrusions 60 of the movable guide plate 50 are arranged to face each other with a space therebetween. Each of the first compression coil springs 56 abuts the lower end of each of the first compression coil springs 56 on the radially outer side of the corresponding spring positioning projection 60 of the movable guide plate 50, and the upper end of each of the first compression coil springs 56 corresponds to the corresponding spring of the stationary support frame 54. The positioning projection 59 is disposed so as to be in contact with the outside in the radial direction. Since the movable guide plate 50 is always forced by each of the first compression coil springs 56 to swing in the counterclockwise direction in FIGS. 4 and 5 around each of the support shafts 51, each of the driven rollers 24 b It is always pressed against the corresponding driven roller 24a. Depending on the thickness of the sheet bundle passing through the nip between each of the driven rollers 24a and the corresponding driven roller 24b, each of the driven rollers 24b moves in the direction away from the corresponding driven roller 24a in the first direction. It is moved integrally with the movable guide plate 50 against each of the compression coil springs 56. That is, this movement is performed by the movable guide plate 50 being swung around each of the support shafts 51. Since the first spring means is constituted by each of the first compression coil springs 56, it is easy and necessary to set the pressing force of each of the driven rollers 24b against the corresponding driven roller 24a. Accordingly, fine adjustment of the pressing force can be easily performed. This fine adjustment can be easily performed, for example, by disposing a movable retainer on each side of the spring positioning projection 59 of the stationary support frame 54 and making the movable retainer axially movable by appropriate screw means. . Furthermore, it is advantageous in terms of mounting space. On the other hand, an embodiment in which the first spring means is constituted by a tension coil spring (not shown) is also conceivable. In that case, it is necessary to dispose the tension coil spring between the end portion of the movable guide plate 50 on the upstream side in the transport direction and another stationary frame (not shown), and there is a possibility that a space for it cannot be secured. Further, when the tension coil spring is set as described above, the movable guide plate 50 is forced counterclockwise in FIG. 4 via the support shaft 51, whereby each driven roller 24b is moved to the corresponding driven roller 24a. Although it is pressed, the operating position of the tension coil spring and each position of the driven roller 24b are relatively distant from each other, and delicate setting or fine adjustment of the spring force is relatively difficult. Therefore, it is practically more useful than the embodiment using the tension coil spring.
[0030]
Referring to FIGS. 9 to 11 together with FIGS. 2, 3, and 5, the center of the movable guide plate 50 in the longitudinal direction and the center in the transport direction are spaced apart in the longitudinal direction. A pair of spring positioning protrusions 62 having a surface are formed so as to protrude upward from the upper surface thereof. Referring mainly to FIGS. 9 to 11, the periphery of each of the spring positioning protrusions 62 is surrounded by an upstanding flange 63 having a substantially square shape when viewed from above. In an upright flange 63 which is a mounting portion of the movable retainer 66 described later, a pair of locking notches 64 are provided in each of the flanges 63a opposed to the longitudinal direction of the movable guide plate 50 and spaced in the transport direction. It is formed so as to face each other in the direction. Each of the locking notches 64 is formed to extend upward from the lower end of the movable guide plate 50, and the upper end thereof is closed at the upper end portion of the corresponding flange 63a. On the outer side in the longitudinal direction of the movable guide plate 50 of each of the flanges 63a, both side walls and upper walls extending outward in the longitudinal direction from the periphery of each of the locking notches 64, and the longitudinal lengths of the both side walls and upper wall. The bulging part 65 which consists of the back wall which obstruct | occludes a direction outer side end is formed. The lower surface of each upper wall 65a of the bulging portion 65 defines the same upper end as the upper end of the corresponding locking notch 64, and the opposite side surfaces of each side wall of the bulging portion 65 correspond to each other. Side surfaces common to both side surfaces of the locking notch 64 are defined.
[0031]
Referring to FIG. 12 together with FIGS. 2, 3 and 5, a movable retainer 66 is mounted substantially inside the upright flange 63 of the movable guide plate 50. The movable retainer 66 that can be integrally formed of an appropriate synthetic resin, preferably a synthetic resin that is allowed to elastically deform, extends between the upright wall 66a facing each other at an interval and the upper end of the upright wall 66a. And a ceiling wall 66b. The top surface of the top wall 66b is formed to have an arc shape when viewed in the direction in which the upright walls 66a face each other. A pair of spring positioning projections 67 having a circular outer peripheral surface are formed on the lower surface of the top wall 66b so as to protrude downward from the lower surface with an interval in the axial direction of the arc surface. Locked projections 68 are formed at the lower ends of the upright walls 66a so as to extend outward at intervals in the width direction of the upright walls 66a.
[0032]
Each of the locked projections 68 is locked to a corresponding locking notch 64 formed on the upright flange 63 of the movable guide plate 50 so that the movable retainer 66 can move up and down. The movable guide plate 50 is mounted on the upright flange 63 so as to be movable up and down. The main body portion of the movable retainer 66 excluding each of the locked protrusions 68 is defined to have a size that allows vertical movement with an appropriate gap inside the upright flange 63. The movement of the movable retainer 66 in the longitudinal direction of the movable guide plate 50 is restricted by the fact that each of the upright walls 66a of the movable retainer 66 is blocked by the corresponding flange 63a. The movement of the movable guide plate 50 is restricted by the locking protrusions 68 of the movable guide plate 50 being blocked by the corresponding side surfaces of the locking notches 64 and the side walls of the bulging portion 65. Fitting and locking of each of the locked projections 68 of the movable guide plate 50 to the corresponding locking notch 64 is easily permitted by elastically deforming each of the upright walls 66a toward each other. The
[0033]
In a state where the movable retainer 66 is mounted on the upright flange 63 of the movable guide plate 50, each of the spring positioning protrusions 67 of the movable retainer 66 is a corresponding spring positioning protrusion surrounded by the upright flange 63 of the movable guide plate 50. Positioned to face 62. Each of the second compression coil springs 58 abuts a lower end of each of the second compression coil springs 58 on a radially outer side of the corresponding spring positioning protrusion 62 of the movable guide plate 50, and an upper end of each of the second compression coil springs 58 corresponds to the corresponding spring of the movable retainer 66. The positioning projection 67 is disposed so as to be in contact with the outside in the radial direction. The movable retainer 66 is forced upward from the movable guide plate 50 by each of the second compression coil springs 58, and each of the locked projections 68 of the movable retainer 66 is engaged with the corresponding lock of the movable guide plate 50. By being in pressure contact with the upper end of the notch 64, upward movement is prevented and it is positioned at the set position. The movable retainer 66 is positioned so that at least a part thereof, in the embodiment, most of the movable retainer 66 on the top wall 66b side protrudes upward from the upper surface of the movable guide member 50 in the state of being positioned at the set position. As will be apparent from the following description, the movable retainer 66 is movable between the set position positioned by the spring force of each of the second compression coil springs 58 and a spring compression position compressed from the set position. It is. Each of the spring positioning protrusions 60 and 62 of the movable guide member 50 is disposed on an imaginary straight line of the movable guide member 50 that is substantially in the center in the transport direction and extends in the longitudinal direction. Therefore, each of the first compression coil spring 56 and each of the second compression coil springs 58 are also arranged in parallel in the longitudinal direction on the straight line. The arrows shown in FIG. 2 indicate the conveyance direction of the sheet bundle (the same applies to the arrows shown in FIG. 6 referred later).
[0034]
The pressing device that presses the driven roller 24b against the driven roller 24a further selectively pressurizes each of the second compression coil springs 58 so that the driven roller 24b is driven against the driven roller 24a and each of the first compression coil springs 56. It includes a pressurizing unit that cooperates and selectively presses. The pressurizing means is arranged on the stationary support frame 54 so as to selectively pressurize each of the second compression coil springs 58. Referring to FIGS. 2, 3, 5, and 13, the pressurizing unit operates the pressurizing plate 70 that is a pressurizing member that is swingably disposed on the stationary support frame 54, and the pressurizing plate 70. And a solenoid SOL which is a driving source. The pressure plate 70 pressurizes each of the second compression coil springs 58 by the solenoid SOL, forcing each of the second compression coil springs 58 to swing the movable guide plate 50 around the support shaft 51, and the driven roller 24b. Is pressed against each driven roller 24a by each of the first compression coil spring 56 and each of the second compression coil springs 58, and the pressure of each of the second compression coil springs 58 is released. It is configured to be selectively moved between the non-pressurized positions. The pressurizing means will be described more specifically.
[0035]
The pressure plate 70 that can be integrally molded from a suitable synthetic resin has a shape in which one corner of a substantially rectangular shape is cut obliquely, and is supported at the corner at one end in the longitudinal direction. A hole 72 is formed, and a long hole 74 is formed at one end of the hole 72 at an interval in the width direction of the pressure plate 70 with respect to the supported hole 72. The long hole 74 is formed to be elongated in the width direction of the pressure plate 70. In the vicinity of the supported hole 72 and the long hole 74 of the pressure plate 70 and closer to the other end than that, the hook-shaped spring locking projection 76 stands upright from the upper surface of the pressure plate 70. Is formed. The disposition position of the spring locking projection 76 is defined so as to be positioned substantially on a virtual circle that passes through the center in the longitudinal direction of the long hole 74 with the axial center of the supported hole 72 as the center. A supported protrusion 78 having an L-shaped cross section is formed at the other end edge of the pressure plate 70. The supported protrusion 78 having a certain width and thickness has an upright portion 78a extending perpendicularly upward from the upper surface of the other end edge of the pressure plate 70, and is opposed to one end of the pressure plate 70 from the upper end of the upright portion 78a. And a supported portion 78b that extends outward at a right angle.
[0036]
A support hole 54A is formed at a position on the side plate 2b side in the vicinity of the center of the stationary support frame 54 in the longitudinal direction and at the downstream end in the transport direction, and a first guide long hole 54B is formed in the vicinity of the support hole 54A. Is formed. The first guide long hole 54B has an arc-shaped portion 54c having an arc shape centered on the axis of the support hole 54A, and one end in the longitudinal direction of the stationary support frame 54 (one end on the side plate 2b side) from one end of the arc-shaped portion 54c. It is comprised from the linear-shaped part 54d extended linearly toward. The arrangement positions of the support hole 54A and the first guide long hole 54B are defined so that the movable retainer 66 exists on the extension of the imaginary straight line passing through the axis of the support hole 54A and the arc-shaped portion 54c. A second guide long hole 54E is formed at a position on the side plate 2a side in the vicinity of the center of the stationary support frame 54 in the longitudinal direction. The second guide long hole 54E is formed in an arc shape centering on the axis of the support hole 54A, and extends from the vicinity of the upstream end of the stationary support frame 54 in the transport direction to the vicinity of the downstream end. Is formed. A spring locking hole 54f and a notch 54g are formed in a flange 54F formed along the upstream end edge of the stationary support frame 54 in the transport direction. The spring locking hole 54f is disposed in the vicinity of an intermediate portion between the second guide long hole 54E and the support hole 54A, and the notch 54g is formed adjacent to the spring locking hole 54f.
[0037]
The pressure plate 70 is supported on the lower surface side of the stationary support frame 54 such that a supported hole 72 is swingable to a support hole 54A of the stationary support frame 54 via a support pin 80 that is a swing shaft. The supported protrusion 78 of the pressure plate 70 is slidably fitted and supported along the second guide long hole 54 </ b> E of the stationary support frame 54. That is, the upright portion 78a of the supported projection 78 of the pressure plate 70 is movably fitted along the second guide long hole 54E, and the supported portion 78b is a radially outer edge of the second guide long hole 54E. Is slidably mounted and supported along the edge. The spring locking projection 76 of the pressure plate 70 projects upward from the arc-shaped portion 54c in the first guide long hole 54B of the stationary support frame 54 and is fitted to the arc-shaped portion 54c so as to be movable along the arc-shaped portion 54c. Are combined.
[0038]
A tension coil spring 82 is disposed between the spring locking projection 76 and a spring locking hole 54 f formed in the flange 54 F of the stationary support frame 54. The notch 54g formed in the flange 54F adjacent to the spring locking hole 54f easily allows the tension coil spring 82 to be locked to the spring locking hole 54f. The pressing plate 70 is forced counterclockwise in FIG. 2 around the support pin 80 by the tension coil spring 82 and is positioned at the home position (the position shown in FIGS. 2, 3 and 5). In a state where the pressure plate 70 is positioned at the home position, the pressure plate 70 is positioned such that the longitudinal direction thereof coincides with the longitudinal direction of the stationary support frame 54 (see FIG. 2). The supported projection 78 of the pressure plate 70 is positioned at the upstream end of the second guide elongated hole 54E of the stationary support frame 54, and the spring locking projection 76 of the pressure plate 70 is the first projection of the stationary support frame 54. It is positioned at the upstream end of the arc-shaped portion 54c in the one guide long hole 54B. The central portion of the long hole 74 of the pressure plate 70 is positioned so as to be aligned with one end portion (one end portion on the arc-shaped portion 54c side) of the linear shape portion 54d in the first guide long hole 54B of the stationary support frame 54. On the upper surface of the stationary support frame 54 outside the side plate 2b side of the pressure plate 70 positioned at the home position, a solenoid SOL that is a drive source of the pressure plate 70 is disposed. The distal end portion of the plunger 84 of the solenoid SOL is positioned so as to extend along the linear shape portion 54d above the linear shape portion 54d in the first guide long hole 54B of the stationary support frame 54. A locking pin 86 is fixed to the tip of the plunger 84 of the solenoid SOL. The locking pin 86 extends downward through the center portion of the elongated hole 74 of the pressure plate 70 and the one end portion of the linearly shaped portion 54d in the first guide elongated hole 54B of the stationary support frame 54 that are aligned with each other. Positioned to do. Thereby, the plunger 84 of the solenoid SOL and the long hole 74 of the pressure plate 70 are connected via the locking pin 86. The locking pin 86 and the elongated hole 74 are movable relative to each other, and the locking pin 86 is movable along the linear portion 54d in the first guide elongated hole 54B of the stationary support frame 54.
[0039]
As described above, in a state where the pressure plate 70 is swingably supported along the lower surface of the stationary support frame 54, the swing locus surface of the lower surface of the pressure plate 70 is the position of the movable retainer 66 at the set position. It is defined to be located a predetermined distance below the top surface. In a state where the pressure plate 70 is positioned at the home position (of course, the solenoid SOL is OFF), the end of the pressure plate 70 on the downstream side in the transport direction is close to the upper surface of the movable retainer 66. Although it is positioned at the upstream side in the transport direction, it is positioned so as not to contact the upper surface of the movable retainer 66, so that the movable retainer 66 is not pressurized. Therefore, the home position of the pressure plate 70 defines a non-pressure position. In a state where the pressure plate 70 is positioned at the non-pressure position, the movable retainer 66 is held at the set position. The movable guide plate 50 is forced downward only by each of the first compression coil springs 56 with the support shaft 51 as the swing center, so that each of the driven rollers 24b in the sort discharge roller pair 24 is driven by the driven roller 24a. On the other hand, it is pressed only by each of the first compression coil springs 56.
[0040]
When the solenoid SOL is turned on, the plunger 84 is moved rightward in FIG. The locking pin 86 of the plunger 84 is moved along one end portion of the linear shape portion 54d in the first guide long hole 54B of the stationary support frame 54 from the other end portion thereof. The pressure plate 70 is swung in the clockwise direction in FIG. 2 against the tension coil spring 82 with the support pin 80 as the rocking center, and the non-pressing position (the position shown in FIGS. 2, 3 and 5). ) To a pressure position (position shown in FIGS. 6 to 8). 6 to 8, the supported projection 78 of the pressure plate 70 is slid along the second guide slot 54E of the stationary support frame 54 from the upstream end to the downstream end. It is done. The spring locking protrusion 76 of the pressure plate 70 is moved along the arcuate portion 54c of the first guide long hole 54B of the stationary support frame 54 from the upstream end to the downstream end. The end of the pressure plate 70 on the downstream side in the transport direction is moved to the top surface of the movable retainer 66. As described above, the swing locus surface of the lower surface of the pressure plate 70 is defined to be positioned below the top surface of the movable retainer 66 at the set position by a predetermined distance. Is pressed by the pressure plate 70 and pushed downward from the upper surface side of the movable guide plate 50 against each of the second compression coil springs 58. The movable retainer 66 is forcibly moved from the set position to the spring compression position, and is positioned at the spring compression position. Since the movable guide plate 50 is forced downward by the first compression coil spring 56 and the second compression coil spring 58 around the support shaft 51, the driven roller 24b in the sort discharge roller pair 24 is forced downward. Are pressed against the driven roller 24a by the first compression coil springs 56 and the second compression coil springs 58, respectively. The nip force between each of the driven rollers 24b and the driven roller 24a is increased corresponding to the cooperative action of each of the second compression coil springs 58.
[0041]
The illustrated finisher 2 includes control means (controller) (not shown). The control means is constituted by a microcomputer, and includes a central processing unit (CPU) that performs arithmetic processing according to a control program, a ROM that stores a control program, a readable / writable RAM that stores arithmetic results, a timer, a counter, an input interface, An output interface is provided. Detection signals from the sheet detection switch SW1, the sheet bundle detection switch SW2, other switches or detectors, etc. are input to the input interface of the control means configured as described above, and the sheet conveyance system is illustrated from the output interface. Non-illustrated electric motors, unillustrated electromagnetic clutches, unillustrated electromagnetic clutches, unillustrated solenoids for the branching claws 12, unillustrated solenoids for the loading means 30, 32 and 34, and solenoids SLO for the pressure plate 70 of the pressing device. To output a control signal. The control means of the finisher 2 is connected to control means (not shown) of the copying machine main body 102, and control signals are exchanged between the two. The controller of the copying machine main body 102 includes a copy start key disposed in the operation means, a paper size (conveyance direction length) setting key, a stapling setting key for designating stapling processing, and a stapling number of one document set. A stapling number setting key to be specified, a stapling number setting key (not shown) for specifying the number of stapling copies (the number of sets), paper post-processing other than stapling processing (non-stapling processing), for example, to specify simple sorting processing Copy information is input from a sort setting key, a sort number setting key, a sort number setting key (not shown) for setting the number of copies (set number), and the like.
[0042]
The finisher 2 of the image forming machine according to the illustrated embodiment is configured as described above, and the operation thereof will be described below with reference to FIG. First, a part related to the present invention in the operation of the staple processing mode in which the staple processing is designated by the staple setting key will be described.
[0043]
When the number of stapled sheets is stocked on the receiving member 38 in the sheet receiving tray 20, the control means operates a not-shown aligning means to perform a predetermined aligning operation (and a width-direction stapling positioning operation). Is done. Next, the stapler 46 is operated, and the stapling process is performed on the sheet bundle having the number of staples. The stapling process is performed at a predetermined position of one end of the sheet bundle stocked on the receiving member 38 (the end on the downstream side in the transport direction in the sheet receiving tray 20 and the lower end in FIG. 1). After the stapling process is performed, the control unit turns on an electromagnetic clutch (not shown) of the drive pulley 42 of the sheet moving unit 40. As a result, the drive pulley 42 is driven to rotate, and the endless belt 44 is driven to rotate counterclockwise. Since the receiving member 38 is moved along the surface of the paper tray 20 together with the endless belt 44, the receiving member 38 moves the bundle of sheets subjected to the stapling process along the surface of the paper tray 20. Then, the sheet is moved toward the sorting discharge roller pair 24 (therefore, the sorting discharge tray 26). At the same time as the electromagnetic clutch of the drive pulley 42 is turned on, the control means determines whether or not stapling processing is designated. In this case, since the stapling process is designated, the control means does not output a control signal to the solenoid SLO for the pressure plate 70 of the pressing device. The solenoid SLO is maintained in the OFF state, and the pressure plate 70 is held at the non-pressure position. The movable retainer 66 is held in a state of being positioned at the set position (see FIGS. 2, 3 and 5). The driven roller 24b of the sorting discharge roller pair 24 is maintained in a state of being pressed by the driven roller 24a only by the pair of first compression coil springs 56. The bundle of sheets whose one end has been stapled is moved along the surface of the sheet receiving tray 20, passes through the sorting discharge path 22, and is discharged onto the sorting discharge tray 26 by the sorting discharge roller pair 24. The above operation is repeated, and when the set number of staple sets (the number of sets) is discharged onto the sorting discharge tray 26, the control unit ends the operation of the staple processing mode. The determination as to whether or not the set number of stapled sheet bundles have been discharged onto the sorting discharge tray 26 is performed by counting the number of ON / OFF times of the sheet bundle detection switch SW2.
[0044]
As described above, the driven roller 24b of the sorting discharge roller pair 24 is maintained in a state of being pressed against the driven roller 24a only by the pair of first compression coil springs 56, and therefore the driven roller 24a of the driven roller 24b. The pressing force against, that is, the nip force is set to be relatively weak. As a result, when the sheet bundle with one end stapled is discharged by the sorting discharge roller pair 24, only the driven roller 24a is driven, so that the leading edge is placed between the lower sheet and the upper sheet. Although there is a possibility that a slippage due to the slip as described above may occur slightly, since one end portion of the sheet bundle is restrained from being relatively moved by stapling, the slipped sheet is separated by the sorting discharge roller pair 24. In the discharging process, relative movement from one end where the relative movement is constrained toward the other end forming a free end that is not constrained is allowed in the nip portion, and beyond the nip portion, toward the other end. Is allowed. The permissible relative movement is due to the fact that the nip force of the sorting discharge roller pair 24 is set to be relatively weak. As a result, damage to the paper such as generation of wrinkles on the paper or damage of the paper at the stapling portion is reliably prevented. Of course, the consistency of the sheet bundle in the state of being discharged to the sorting discharge tray 26 is also ensured.
[0045]
On the other hand, as the sheet bundle is curved, as described above, a deviation in the conveying direction occurs between all the sheets. However, one end of the sheet bundle is stapled and is restrained so that relative movement between the sheets is not allowed. As a result, when the sheet bundle is bent, each of the sheets tends to move relatively from one end where the relative movement is constrained toward the other end which forms a free end which is not constrained. As described above, in the present invention, the nip force of the sorting discharge roller pair 24 is set to be relatively weak. Therefore, the sheet is directed from the constrained one end to the other end forming a free end that is not constrained. The relative movement is allowed at the nip portion and allowed to go beyond the nip portion toward the other end. As a result, damage to the paper such as generation of wrinkles on the paper or damage of the paper at the stapling portion is reliably prevented. Of course, the consistency of the sheet bundle in the state of being discharged to the sorting discharge tray 26 is also ensured. As the thickness of the sheet bundle increases, the driven roller 24b of the sort discharge roller pair 24 is separated from the driven roller 24a against each of the first compression coil springs 56. A nip force corresponding to the thickness can be obtained.
[0046]
Next, a part related to the present invention in the operation of the sort processing mode (non-staple processing mode) in which simple sort processing is designated by the sort setting key will be described. When the sheets are stocked on the receiving member 38 by the number of sheets to be sorted, the control unit activates an alignment unit (not shown) to perform a predetermined alignment operation. Next, the control unit turns on an electromagnetic clutch (not shown) of the drive pulley 42 of the sheet moving unit 40. As a result, the drive pulley 42 is driven to rotate, and the endless belt 44 is driven to rotate counterclockwise. Since the receiving member 38 is moved along the surface of the paper receiving tray 20 integrally with the endless belt 44, the receiving member 38 transfers the sheet bundle along the surface of the paper receiving tray 20 to the sorting discharge roller pair 24. Move towards. At the same time as the electromagnetic clutch of the drive pulley 42 is turned on, the control means determines whether or not stapling processing is designated. In this case, since the stapling process is not designated, the control means outputs a control signal to the solenoid SLO for the pressure plate 70 of the pressing device to turn on the solenoid SLO. The pressing plate 70 is swung from the non-pressing position to the pressing position, and the movable retainer 66 is forcibly moved from the set position to the spring compression position to compress each of the second compression coil springs 58 (FIGS. 6 to 6). (See FIG. 8). The driven roller 24b of the sorting discharge roller pair 24 is maintained in a state of being pressed against the driven roller 24a by each of the first compression coil springs 56 and each of the second compression coil springs 58. The sheet bundle is moved along the surface of the sheet receiving tray 20, passes through the sorting discharge path 22, and is then discharged onto the sorting discharge tray 26 by the sorting discharge roller pair 24. When the above operation is repeated and the set number of sort sets (the number of sets) is discharged onto the sort discharge tray 26, the control unit ends the operation of the sort processing mode.
[0047]
As described above, the driven roller 24b of the sorting discharge roller pair 24 is maintained in a state of being pressed against the driven roller 24a by each of the first compression coil springs 56 and each of the second compression coil springs 58. The pressing force of the driven roller 24 b against the driven roller 24 a, that is, the nip force is strengthened as compared with the case where it is pressed only by each of the first compression coil springs 56. As a result, when a non-staple sheet bundle whose both ends are free ends is discharged by the sorting discharge roller pair 24, the above-described slippage, that is, the deviation between the sheets, even though only the driven roller 24a is driven. Can be prevented. On the other hand, when the sheet bundle is curved, a deviation in the transport direction is generated between all sheets due to the difference in radius of the curved portion. This misalignment forms a free end where the both ends of the non-staple sheet bundle are not substantially constrained. Therefore, the deviation is allowed on both sides in the transport direction with the nip portion of the driven roller 24b and the driven roller 24a as a boundary. It is naturally eliminated by being discharged to 26 and restored to a linear state, and does not substantially cause misalignment. As a result, the consistency of the sheet bundle in the state of being discharged to the sorting discharge tray 26 is ensured. Of course, damage to the paper such as generation of wrinkles on the paper or damage of the paper is reliably prevented. As the thickness of the sheet bundle increases, the driven roller 24b of the sorting discharge roller pair 24 resists each of the first compression coil spring 56 and the second compression coil spring 58 from the driven roller 24a. Since they are separated, a nip force corresponding to the thickness of the sheet bundle is obtained.
[0048]
As mentioned above, although this invention was demonstrated in detail, referring an accompanying drawing based on embodiment, this invention is not limited to the said embodiment, Furthermore, various other various, without deviating from the scope of the present invention. Can be modified or modified. For example, in the above embodiment, the pressurizing member in the pressurizing means is composed of the pressurizing plate 70 and the drive source is composed of the solenoid SOL, but there are other embodiments that employ a cam instead of the pressurizing plate 70. . In this case, the drive source is established whether it is a solenoid SOL or an electric motor. In addition, the present invention can be applied to a processing mode using adhesion and a processing mode using binding instead of setting the staple processing mode. Furthermore, in the present invention, the second paper transport path is arranged so as to extend substantially linearly from the paper transport entrance side to the other side of the finisher opposite to the copying machine main body. The present invention can also be applied to a finisher in which a paper stock portion corresponding to a paper tray is disposed in the middle of the above. In this type of finisher, paper post-processing means such as a stapler or puncher is disposed upstream of the paper stock portion in the second paper transport path, and receives one end of the paper and temporarily stocks it in the paper stock portion. The receiving means for this is disposed downstream of the sheet post-processing means. The receiving means receives the leading end in the paper transport direction. A sort discharge roller pair is disposed at the downstream end of the sheet conveyance path, and a sort discharge tray is disposed on the other side of the finisher opposite to the copying machine main body. The bundle of sheets stocked in the sheet stock section by the receiving means is stapled at the upstream end in the transport direction, for example, by a stapler. The stapled bundle of sheets is transported by a pair of transport rollers as a sheet moving means, and discharged to a sorting discharge tray by a pair of sorting discharge rollers. When the sheet bundle passes the sorting discharge roller pair, the sheet bundle is bent in the vertical direction by a step between the sheet conveyance path and the sorting discharge tray. Therefore, when the present invention is applied to such a form of finisher, the same operation and effect as in the previous embodiment can be achieved. The present invention is also applicable to other types of finishers. As a specific example of another form of finisher, an intermediate transport path (paper return path) of paper is mounted inside the copier body in a copier capable of duplex copying by reversing and transporting the paper. An example of the finisher may be a finisher that performs sheet post-processing on a sheet carried in through a sheet and then discharges the sheet to a sorting discharge tray. The discharge of the sheet bundle to the sorting discharge tray is performed by a sorting discharge roller pair. When the sheet bundle passes the sorting discharge roller pair, the sheet bundle is bent in the vertical direction by a step between the sheet conveyance path and the sorting discharge tray. Therefore, when the present invention is applied to such a form of finisher, the same operation and effect as in the previous embodiment can be achieved.
[0049]
【The invention's effect】
According to the finisher of the image forming apparatus according to the present invention, it is possible to ensure the consistency of the sheet bundle discharged to the sorting discharge tray and prevent the damage of the sheet regardless of the staple or the non-staple. . In addition, it is possible to change the nip pressure of the pair of discharge rollers for sorting in accordance with staple or non-staple, and the consistency of the bundle of sheets discharged to the sort discharge tray can be controlled regardless of whether staple or non-staple. It is possible to secure and prevent paper damage.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an embodiment of a finisher of an image forming machine configured according to the present invention.
FIG. 2 is a top view showing a pressing device for a sorting discharge roller pair provided in the finisher shown in FIG. 1 with a part thereof omitted;
3 is a view of the pressing device as viewed from the downstream side in the conveyance direction of the sheet bundle in FIG. 2, and a part thereof is omitted and a part is shown in cross section.
4 is a view of the pressing device as viewed from the right side in FIG. 2, in which a part thereof is omitted and a portion where the first spring means is disposed is shown in cross section.
5 is a view of the pressing device when viewed from the right side in FIG. 2, in which a part of the pressing device is omitted and the arrangement of the second spring means is shown in cross section.
6 is a top view showing another operation mode of the pressing device shown in FIG. 2. FIG.
7 is a view showing another operation mode of the pressing device shown in FIG. 3;
8 is a view showing another operation mode of the pressing device shown in FIG. 5;
FIG. 9 is a top view showing a support portion of the movable retainer in the movable guide plate.
10 is a cross-sectional view taken along the line AA in FIG. 9;
11 is a cross-sectional view taken along the line B-B in FIG. 9;
FIG. 12 is a perspective view of a movable retainer.
FIG. 13 is a perspective view of a pressure plate.
[Explanation of symbols]
2 Finisher
20 Paper tray
22 Discharge channel for sorting
24 Sorting discharge roller pair
24a driven roller
24b Driven roller
49 Stationary guide plate
50 Movable guide plate
56 First compression coil spring
58 Second compression coil spring
66 Movable retainer
70 Pressure plate
100 copier
102 Copier body

Claims (6)

  1. A paper tray, a receiving means for receiving and temporarily stocking one end of the paper carried into the paper base, and a bundle of paper received and stocked by the receiving means toward the sorting discharge tray Sheet moving means, a sorting discharge path disposed between the sheet receiving tray and the sorting discharge tray, and a sorting roller disposed in the sorting discharge path and including a driven roller and a driven roller. A discharge roller pair; a pressing device that presses the driven roller against the driven roller; and a stapler that is disposed on the opposite side to the side adjacent to the sorting discharge path of the paper tray. In the finisher of the image forming machine including the first spring means for constantly pressing the driven roller against the driven roller,
    The pressing device cooperates with the first spring means to be capable of pressing the driven roller against the driven roller, and selectively pressurizes the second spring means to turn the driven roller into the driven roller. and a pressure means for selectively pressing first spring means in cooperation with the look-containing,
    Control means for controlling the pressing device is provided. When the staple processing mode is set, the control means controls the pressurizing means so as not to pressurize the second spring means, and the driven roller is controlled only by the first spring means. When the driven roller is pressed and a processing mode other than the stapling processing mode is set, the pressing means is controlled to pressurize the second spring means, and the driven roller is driven by the first spring means and the second spring means. To the driven roller,
    The finisher of the image forming machine characterized by the above.
  2. The sorting discharge path is composed of a stationary guide member and a movable guide member that is disposed so as to face the stationary guide member at an interval and is swingably disposed with one end portion as a swing center. A driven roller is rotatably disposed on the guide member, and a stationary support frame is disposed on the opposite side of the movable guide member opposite to the side facing the stationary guide member so as to face the stationary support frame. The first spring means is disposed between the movable guide member and the movable guide member, the second spring means is disposed on the movable guide member, and the first spring means swings the movable guide member about the swing center. constantly forced by always presses the driven roller to the driven roller, the pressing means is configured to be able to selectively pressurizing the second spring means is disposed stationary support frame, according to claim 1 Symbol The finisher of the image forming machine.
  3. The finisher of an image forming machine according to claim 2 , wherein the first spring means is constituted by a compression coil spring.
  4. The pressurizing means includes a pressurizing member disposed on the stationary support frame, and a drive source for operating the pressurizing member. The pressurizing member pressurizes the second spring means by the drive source, and the second spring. A pressure position in which the means forcibly moves the movable guide member around the swing center so that the driven roller is pressed against the driven roller by the first spring means and the second spring means; and second spring means The finisher of an image forming machine according to claim 2 or 3 , wherein the finisher is selectively moved between a non-pressurizing position where the pressurization is released.
  5. The second spring means is composed of a compression coil spring, one end of the compression coil spring is in contact with the movable guide member, the other end is in contact with a movable retainer disposed movably on the movable guide member, and the movable retainer is The movable retainer is movable between a set position positioned by the spring force of the compression coil spring and a spring compression position obtained by compressing the compression coil spring from the set position, and when the pressing member is positioned at the pressing position. is caused to forcibly move the spring compressed position from the set position by a pressure member, the pressure member when positioned in the non-pressurized position, the movable retainer is returned to the set position from the spring compressed position by a compression coil spring, according to claim 4 The finisher of the image forming machine described.
  6. The movable retainer is positioned so that at least a part of the movable retainer protrudes upward from the upper surface of the movable guide member in a state where the movable retainer is positioned at the set position, and the pressing member is swingably supported along the stationary support frame. Is composed of a solenoid supported by a stationary support frame and drivingly connected to a pressure member. When the solenoid is OFF, the pressure member is positioned at a non-pressure position to hold the movable retainer at the set position. When is turned on, the pressure member is swung from the non-pressure position to the pressure position and pushes the movable retainer downward from the upper surface side of the movable guide member, thereby positioning the pressure member from the set position to the spring compression position. The finisher of the image forming machine according to claim 5 .
JP2000042688A 2000-02-21 2000-02-21 Finisher of image forming machine Expired - Lifetime JP3613116B2 (en)

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Application Number Priority Date Filing Date Title
JP2000042688A JP3613116B2 (en) 2000-02-21 2000-02-21 Finisher of image forming machine

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Application Number Priority Date Filing Date Title
JP2000042688A JP3613116B2 (en) 2000-02-21 2000-02-21 Finisher of image forming machine

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JP3613116B2 true JP3613116B2 (en) 2005-01-26

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4591432B2 (en) * 2006-10-13 2010-12-01 マックス株式会社 Paper processing device
JP6360285B2 (en) 2013-07-12 2018-07-18 キヤノンファインテックニスカ株式会社 Sheet processing apparatus and image forming system provided with the same
JP6244751B2 (en) * 2013-09-03 2017-12-13 コニカミノルタ株式会社 Paper processing apparatus, image forming apparatus, and image forming system

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