JP3850717B2 - Paper processing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is provided in an image forming apparatus such as a copying machine, a printer, or a printing machine as a single unit or separately, and performs predetermined processing such as binding, punching, alignment, and folding on an image-formed sheet (recording medium). The present invention relates to a paper processing apparatus that performs paper ejection by discharging.
[0002]
[Prior art]
2. Description of the Related Art Post-processing devices that are disposed downstream of an image output device such as a copying machine or a printer and perform post-processing such as binding and punching on output recording paper (paper-recording medium) are widely known. In recent years, it has been proposed that the functions are multifunctional, and in addition to the conventional end face binding, the saddle stitching process and the middle folding process are also possible. However, many of them are limited in function because the machine is large or complex.
[0003]
For example, Japanese Patent Application Laid-Open No. 07-48062 and Japanese Patent Application Laid-Open No. 2000-153947 disclose one in which the path is switched at the apparatus entrance and the end face binding function and the saddle stitching function are completely independent. This configuration has advantages such as easy unitization and easy response to less options. However, it has a cost disadvantage because it has similar functions. In addition, the sheet is aligned and bound during saddle stitching, and folding is performed on the spot. Therefore, the sheet for the next job is loaded in the saddle stitching section until the previous job is completely folded. I can't accept it, and I can't expect an improvement in productivity.
[0004]
In order to solve such a problem, for example, Japanese Patent Application Laid-Open No. 2000-118861 and Japanese Patent Application Laid-Open No. 7-187479 disclose end face binding and saddle stitching in a processing tray that is inclined so that the downstream side in the sheet conveyance direction becomes higher. It has been proposed to perform time alignment processing and binding processing, and after the binding processing, switchback transport to another station arranged below the processing tray (convey in the direction opposite to the end face binding discharge) and perform folding processing. Yes. Certainly, in these known techniques, the productivity is improved by arranging the folding mechanism separately, and the cost increase due to overlapping mechanisms is minimized. However, in order to improve productivity, it is necessary to arrange the folding processing section long enough and the binding processing tray is arranged at the top, so the two trays become a continuous "U" shape and the machine is large. Therefore, it is impossible to meet the recent installation situation where space saving is desired.
[0005]
Therefore, in order to suppress an increase in the size of the machine, Japanese Patent Laid-Open No. 2000-63031 proposes an invention in which folding processing is performed in such a manner that a sheet bundle straddles the binding processing tray. Absent.
[0006]
Further, in Japanese Patent Laid-Open Nos. 11-286368 and 2000-86067, a folding roller is disposed slightly above the middle portion of the binding processing tray for the purpose of sharing the processing tray or shortening the conveyance path. However, there has been proposed an invention in which a folding process is performed directly and discharged outside the apparatus. In these cases, as described above, not only the improvement in productivity cannot be expected, but also the folding roller is arranged above the processing tray whose downstream side is highly inclined, so that the machine is actually considerably large.
[0007]
Furthermore, it goes without saying that a single function (only for saddle stitching) such as that disclosed in Japanese Patent Laid-Open No. 9-183558 does not match the needs of the times.
[0008]
[Problems to be solved by the invention]
Thus, in the invention according to the conventional example,
(1) It is disadvantageous in terms of cost because it has similar functions in duplicate.
{Circle around (2)} The sheet of the next job cannot be received until the folding of the previous job is completely completed in the saddle stitching portion, and improvement in productivity cannot be expected.
(3) If the folding section is arranged long enough to improve productivity, the machine becomes large and space cannot be saved.
There are problems such as.
[0009]
The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide a sheet processing apparatus including a sheet bundle conveying apparatus that is low in cost, high in productivity, and excellent in space saving. It is to provide.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the first means includes a processing means for performing a predetermined process on the sheet or the sheet bundle and a branching portion of a plurality of transport paths, and has been processed by the processing means. A sheet processing apparatus having switching means for switching a transport direction of a sheet or sheet bundle that has not been switched to either the first transport path or the second transport path, The conveyance path formed by the switching means for guiding the paper to the second conveyance path is deflected, A first position for transporting the sheet to the first transport path by the switching means, and a second position for transporting the sheet to the second transport path And a third position for conveying the sheet to the second conveyance path between the first position and the second position. Control means to set to either The conveyance path formed by the switching means at the third position is set wider in the direction perpendicular to the paper surface of the sheet or sheet bundle than the conveyance path formed by the switching means at the second position. It is characterized by.
[0011]
According to the first means, the switching between the first conveyance path and the second conveyance path can be easily performed by taking the two different positions of the first or second position by the switching means. Also, the third position is set according to the thickness of the sheet bundle to be conveyed so that the deflection can be smoothly performed even when the curvature to be deflected is large, and the curvature to be deflected even when the deflection angle is steep is set. It becomes possible to carry a large set, and space saving can be achieved.
[0012]
The second means is A processing unit that performs a predetermined process on a sheet or a sheet bundle and a branching unit of a plurality of conveyance paths, and a conveyance direction of the sheet or the sheet bundle that is processed or not processed by the processing unit is set to a first direction. Switching means for switching to one of the second transport path and the second transport path, a first position for transporting the paper to the first transport path with the switching means, and the first Control means for setting to any one of a second position for conveying the sheet to the second conveyance path and a third position intermediate between the first position and the second position; The switching means includes a first guide member provided so as to be swingable along a surface of a transport roller that transports a sheet or a bundle of sheets at a predetermined interval, and the first guide member as the first guide member. When the first guiding member is positioned at the second position and the driving means that is positioned at the second position that is guided to the second conveying path and the second position that is guided to the second conveying path, the first guide member is positioned at the second position. A second guide member that guides the sheet or sheet bundle to a gap between the guide member and the surface of the transport roller on the upstream side in the sheet transport direction and opens the path on the first transport path side when positioned at the first position; A pressure roller that is provided on the second guide member and presses the sheet or sheet bundle toward the conveyance roller when guiding the sheet or sheet bundle to the second conveyance path, and the control means When the third position is set And wherein the pressure roller be a predetermined distance apart from the conveying roller.
[0013]
According to the second means, the switching means is constituted by the first and second guide members, and the first guide member is arranged along the surface with a predetermined distance from the surface of the transport roller for transporting the sheet or sheet bundle. Switching between the first transport path and the second transport path can be easily performed by providing the two swingable positions so as to be able to swing. At that time, since the guide is performed along the surface of the conveying roller, the deflection angle can be freely set to about 180 ° according to the circumferential length of the first guide member. In addition, when the second guide member is provided with a pressure roller that presses the sheet or the sheet bundle toward the conveyance roller, and when the sheet or the sheet bundle is guided to the second conveyance path, the switching unit is arranged at the third position. When set to, the pressure roller is separated from the conveyance roller by a processing distance, so that the leading edge of the sheet bundle can be reliably guided between the pressure roller and the conveyance roller.
[0014]
The third means is the second means, wherein when the control means conveys the sheet bundle to the second conveyance path side, the leading edge of the sheet bundle is received at the third position, and the leading edge of the sheet bundle The section is set to the second position after passing through the nip between the pressure roller and the transport roller.
[0015]
According to the third means, the first guide member is positioned at the third position only when the sheet bundle is received, and after the leading end of the sheet bundle passes through the nip between the pressure roller and the transport roller, the first guide member is moved to the second position. The sheet bundle is pressed toward the conveying roller by the pressure roller. Thereby, the conveyance force by the conveyance roller is applied to the sheet bundle.
[0016]
The fourth means is characterized in that, in the third means, the setting change timing from the third position to the second position is set to be the same regardless of the size of the sheet bundle. .
[0017]
According to the fourth means, the conveyance conditions differ for each paper size. At that time, the pressure applied by the pressure roller is the same timing, in other words, the conveyance with the pressure roller regardless of the paper size. Pressing by the pressure roller is started at the same position from the front end of the sheet starting from the entry position of the roller nip. As a result, it is possible to make the paper transport conditions constant when entering the nip regardless of the paper size.
[0018]
The fifth means is characterized in that, in the second means, the predetermined distance is set according to the number of sheets to be bound.
[0019]
According to the fifth means, since the distance between the pressure roller and the transport roller is set according to the thickness of the sheet bundle, it is possible to set the transport condition corresponding to the thickness of the sheet bundle.
[0020]
The sixth means is characterized in that, in the fifth means, the predetermined distance is set to a smaller distance as the number of sheets to be bound is smaller.
[0021]
According to the sixth means, as the number of sheets to be bound is smaller, the predetermined distance is set to a smaller distance. Therefore, when the sheet bundle is thick and thin, when the sheet enters the nip between the pressure roller and the conveyance roller, The load can be set to be equal and stable conveyance is possible.
[0022]
In the following embodiments, the transport roller is the discharge roller 56, the first guide member is the movable guide 55, the first transport path is the transport path C, and the second transport path is the half-fold processing tray G. The lower bundle conveying guide plate 91 and the upper bundle conveying guide plate 92, the driving means are the springs 58 and 59, the link arm 60, the cam 61 and the bundle branching drive motor 161, and the second guide member is the branching guide plate 54. The pressure roller is the pressure roller 57, the switching means is the movable guide 55 and the branch guide plate 54, the processing means is the end face stitching stapler S1, the saddle stitching stapler S2 and the jogger fence 53, or the folding mechanism, and the folding mechanism is folded. The control means controls the plate 74 and the folding plate driving cam 75, the link arm 76 and the folding plate driving motor 166 which are driving mechanisms thereof. Corresponding respectively to the location 350.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0024]
1. overall structure
FIG. 1 is a diagram illustrating a system configuration of an image forming system including a sheet post-processing apparatus and an image forming apparatus as a sheet processing apparatus according to an embodiment of the present invention. In FIG. Part of the device is shown.
[0025]
In FIG. 1, a sheet post-processing device PD is attached to a side portion of the image forming apparatus PR, and a sheet (recording medium) discharged from the image forming apparatus PR is guided to the sheet post-processing device PD. The sheet passes through a conveyance path A having post-processing means (in this embodiment, a punch unit 100 as a punching means) for post-processing one sheet, and then to the conveyance path B and the shift tray 202 which are led to the upper tray 201. The branching claw 15 and the branching claw 16 are configured to distribute to a conveyance path C that leads to a conveyance path D that leads to a conveyance path C that leads, and a processing tray F that performs alignment, stapling, and the like (hereinafter also referred to as a staple processing tray).
[0026]
The paper guided to the staple processing tray F through the transport paths A and D, and aligned and stapled in the staple processing tray is guided to the shift tray 202 by the branch guide plate 54 and the movable guide 55 which are deflecting means. The sheet is configured to be distributed to a path C, a processing tray G that performs folding or the like (hereinafter also referred to as a middle folding processing tray). Led to. Further, a branching claw 17 is disposed in the conveyance path D, and is held in the state shown in the figure by a low load spring (not shown). After the trailing edge of the sheet passes through this, the conveyance rollers 9, 10 and the staple discharge roller 11 is configured such that at least the conveying roller 9 is reversed to guide the trailing edge of the sheet to the sheet accommodating portion E so that the sheet is retained and conveyed while being overlapped with the next sheet. By repeating this operation, it is possible to convey two or more sheets in a superimposed manner.
[0027]
In the conveyance path A common to the upstream of the conveyance path B, the conveyance path C, and the conveyance path D, an inlet sensor 301 that detects a sheet received from the image forming apparatus, an inlet roller 1, a punch unit 100, and a punch downstream thereof. The waste hopper 101, the conveying roller 2, the branching claw 15 and the branching claw 16 are sequentially arranged. The branch claw 15 and the branch claw 16 are held in the state shown in FIG. 1 by a spring (not shown), and when the solenoid (not shown) is turned on, the branch claw 15 rotates upward and the branch claw 16 rotates downward. The paper is distributed to the conveyance path B, the conveyance path C, and the conveyance path D.
[0028]
When guiding the paper to the conveyance path B, the branching claw 15 is in the state of FIG. 1 and the solenoid is OFF. When guiding the paper to the conveyance path C, the branching claw 15 is turned on by turning on the solenoid from the state of FIG. When the paper is guided to the transport path D, the branch claw 16 is in the state of FIG. 1, the solenoid is OFF, and the branch claw 15 is in the state of FIG. By turning on the solenoid, the solenoid is turned upward.
[0029]
In this paper post-processing apparatus, punching (punching unit 100), paper alignment + edge binding (jogger fence 53, edge binding stapler S1), paper alignment + saddle stitching (jogger fence 53, saddle stitching stapler) is performed on the paper. S2), paper sorting (shift tray 202), center folding (folding plate 74, folding rollers 81, 82), and the like can be performed.
[0030]
In this embodiment, the image forming apparatus PR performs optical writing on an image forming medium such as a photosensitive drum based on the input image data to form a latent image on the surface of the photosensitive drum, and the formed latent image is displayed. This is an image forming apparatus using a so-called electrophotographic process in which toner is developed, transferred to a recording medium such as paper, fixed, and discharged, and the image forming apparatus using the electrophotographic process itself is well known, so the details here Description and illustration of this configuration are omitted. In this embodiment, an image forming apparatus using an electrophotographic process is illustrated. However, a system using a known image forming apparatus such as an inkjet or a printing machine and a printing machine (printer) may also be used. Needless to say.
[0031]
2. Shift tray section
The shift tray paper discharge unit I located at the most downstream portion of the paper post-processing device PD includes a shift paper discharge roller 6, a return roller 13, a paper surface detection sensor 330, a shift tray 202, and a shift mechanism shown in FIG. J and a shift tray lifting mechanism K shown in FIG. 2 is an enlarged perspective view of the main part showing details of the shift mechanism J, and FIG. 3 is an enlarged perspective view of the main part of the shift tray lifting mechanism K.
[0032]
1 and 3, reference numeral 13 denotes a sponge roller for contacting the paper discharged from the shift paper discharge roller 6 and aligning the rear end of the paper against the end fence 32 shown in FIG. The return roller 13 is rotated by the rotational force of the shift paper discharge roller 6. A tray lift limit switch 333 is provided in the vicinity of the return roller 13, and when the shift tray 202 is lifted to push up the return roller 13, the tray lift limit switch 333 is turned on and the tray lifting / lowering motor 168 is stopped. Thereby, overrun of the shift tray 202 is prevented. Further, as shown in FIG. 1, a paper surface detection sensor 330 is provided in the vicinity of the return roller 13 as paper surface position detecting means for detecting the paper surface position of the paper discharged on the shift tray 202 or the sheet bundle. Yes.
[0033]
Although not shown in detail in FIG. 1, the paper surface detection sensor 330 includes the paper surface detection lever 30 shown in FIG. 3, a paper surface detection sensor (for stippling) 330a, and a paper surface detection sensor (for non-stipple) 330b. Yes. The paper surface detection lever 30 is provided so as to be rotatable about the shaft portion of the lever, and includes a contact portion 30 a that contacts the upper surface of the rear end of the paper loaded on the shift tray 202 and a fan-shaped shielding portion 30 b. The paper surface detection sensor (for stippling) 330a located above is mainly used for staple discharge control, and the paper surface detection sensor (for non-stipple) 330b is mainly used for shift discharge control.
[0034]
In the present embodiment, the paper surface detection sensor (for stipple) 330a and the paper surface detection sensor (for non-stipple) 330b are turned on when blocked by the shielding portion 30b. Therefore, when the shift tray 202 is raised and the contact portion 30a of the paper surface detection lever 30 is rotated upward, the paper surface detection sensor (for stippling) 330a is turned off, and when further rotated, the paper surface detection sensor (for non-stipple) 330b is turned on. To do. When it is detected by the paper surface detection sensor (for stipple) 330a and the paper surface detection sensor (for non-stipple) 330b that the sheet stacking amount has reached a predetermined height, the shift tray 202 is driven by the tray lift motor 168 to a predetermined amount. Descend. Thereby, the paper surface position of the shift tray 202 is kept substantially constant.
[0035]
2.1 Shift tray lifting mechanism
The lifting mechanism for the shift tray 202 will be described in detail.
[0036]
As shown in FIG. 3, the shift tray 202 moves up and down when the drive shaft 21 is driven by the drive unit L. A timing belt 23 is stretched between the drive shaft 21 and the driven shaft 22 via a timing pulley, and a side plate 24 that supports the shift tray 202 is fixed to the timing belt 23. With this configuration, the unit including the shift tray 202 is suspended from the timing belt 23 so as to be able to move up and down.
[0037]
The drive unit L is composed of a tray lifting / lowering motor 168 and a worm gear 25, and the power generated by the tray lifting / lowering motor 168 capable of forward / reverse rotation as a driving source is a gear train fixed to the driving shaft 21 via the worm gear 25. The shift gear 202 is moved in the vertical direction by being transmitted to the final gear. Since the power transmission system is via the worm gear 25, the shift tray 202 can be held at a fixed position, and this gear configuration can prevent an accidental drop accident of the shift tray 202 and the like.
[0038]
A shielding plate 24a is integrally formed on the side plate 24 of the shift tray 202, and a fullness detection sensor 334 for detecting the full load of stacked sheets and a lower limit sensor 335 for detecting a lower limit position are disposed below the shielding plate 24a. Thus, the fullness detection sensor 334 and the lower limit sensor 335 are turned on / off. The fullness detection sensor 334 and the lower limit sensor 335 are photosensors, and are turned on when blocked by the shielding plate 24a. In FIG. 3, the shift paper discharge roller 6 is omitted.
[0039]
As shown in FIG. 2, the swing mechanism of the shift tray 202 includes a shift motor 169 and a shift cam 31. By rotating the shift cam 31 using the shift motor 169 as a drive source, the shift tray 202 can eject paper. Reciprocates in a direction perpendicular to the direction. A pin 31 a is set up on the shift cam 31 at a position away from the center of the rotation shaft, and the other end of the pin 31 a is loosely fitted in the elongated hole 32 b of the engagement member 32 a of the end fence 32. The engaging member 32a is fixed to the back surface of the end fence 32 (the surface on which the shift tray 202 is not located) and reciprocates in a direction perpendicular to the paper discharge direction according to the rotational position of the pin 31a of the shift cam 31. As a result, the shift tray 202 also moves in a direction perpendicular to the paper discharge direction. The shift tray 202 stops at two positions on the front side and the back side in FIG. 1 (corresponding to an enlarged view of the shift cam 31 in FIG. 2), and the stop control detects the notch of the shift cam 31 by the shift sensor 336. This is performed by controlling the shift motor 169 on and off based on the detection signal.
[0040]
On the front side of the end fence 32, a guide protrusion 32c for the shift tray 202 is provided, and the rear end portion of the shift tray 202 is loosely fitted to the protrusion 32c so as to freely move up and down. 202 is supported by the end fence 32 so that it can move up and down and can reciprocate in a direction perpendicular to the paper transport direction. The end fence 32 has a function of guiding the trailing edge of the loaded paper on the shift tray 202 and aligning the trailing edges.
[0041]
2.2 Output section
FIG. 4 is a perspective view showing the structure of the paper discharge section to the shift tray 202. FIG.
[0042]
1 and 4, the shift paper discharge roller 6 has a driving roller 6a and a driven roller 6b. The driven roller 6b is supported on the upstream side in the paper discharge direction and is provided with an open / close guide plate that can swing up and down. 33 is rotatably supported at the free end portion. The driven roller 6b abuts on the driving roller 6a by its own weight or urging force, and the paper is nipped between the rollers 6a and 6b and discharged. When the bound sheet bundle is discharged, the open / close guide plate 33 is pulled upward and returned at a predetermined timing. This timing is determined based on the detection signal of the shift paper discharge sensor 303. Is done. The stop position is determined based on the detection signal of the paper discharge guide plate opening / closing sensor 331 and is driven by the paper discharge guide plate opening / closing motor 167. The discharge guide plate opening / closing motor 167 is driven and controlled by turning on / off a discharge guide plate opening / closing limit switch 332.
[0043]
3 Stipple processing tray
3.1 Overall configuration of the staple processing tray
The configuration of the staple processing tray F that performs the staple processing will be described in detail.
[0044]
FIG. 5 is a plan view of the staple processing tray F viewed from a direction perpendicular to the sheet conveying surface, FIG. 6 is a perspective view showing the staple processing tray F and its driving mechanism, and FIG. 7 is a perspective view showing the sheet bundle discharging mechanism. It is. First, as shown in FIG. 6, the sheets guided to the staple processing tray F by the staple discharge roller 11 are sequentially stacked on the staple processing tray F. In this case, alignment in the vertical direction (paper conveyance direction) is performed by the tapping roller 12 for each sheet, and alignment in the horizontal direction (direction perpendicular to the sheet conveyance direction—also referred to as the sheet width direction) is performed by the jogger fence 53. The end-face stitching stapler S1 is driven by a staple signal from the control device 350 (see FIG. 23) between job breaks, that is, between the last sheet of the sheet bundle and the first sheet of the next sheet bundle, and the binding process is performed. The sheet bundle subjected to the binding process is immediately sent to the shift paper discharge roller 6 by the discharge belt 52 with the discharge claw 52a protruding, and is discharged to the shift tray 202 set at the receiving position.
[0045]
3.2 Paper release mechanism
As shown in FIG. 7, the home position of the discharge claw 52a is detected by a discharge belt HP sensor 311. The discharge belt HP sensor 311 is turned on by a discharge claw 52a provided on the discharge belt 52. -Turn off. Two discharge claws 52a are arranged at opposing positions on the outer periphery of the discharge belt 52, which is a timing belt, and the sheet bundle stored in the staple processing tray F is moved and conveyed alternately. Further, if necessary, the discharge belt 52 is rotated in the reverse direction, and the sheet bundle stored in the staple processing tray F on the back side of the discharge claw 52a and the discharge claw 52a 'on the opposite side waiting to move the sheet bundle. It is also possible to align the tips in the transport direction. Therefore, the discharge claw 52a also functions as a means for aligning the sheet bundle in the sheet conveyance direction.
[0046]
As shown in FIG. 5, the discharge shaft 65, which is the drive shaft of the discharge belt 52 driven by the discharge motor 157, has the discharge belt 52 and its drive pulley 62 arranged at the alignment center in the paper width direction. A discharge roller 56 is arranged and fixed symmetrically with respect to the drive pulley 62. Further, the peripheral speed of these discharge rollers 56 is set to be higher than the peripheral speed of the discharge belt 52.
[0047]
The discharge belt 52 transmits the driving force of the discharge motor 157 via a timing belt and a timing pulley 62. Here, the timing pulley (driving pulley) 62 and the discharge roller 56 are configured by being arranged on the same shaft (discharge shaft 65). When changing the speed relationship between the discharge roller 56 and the discharge belt, the discharge roller 56 can be idled on the discharge shaft 65, and the driving force divided from the discharge motor 157 is transmitted to the discharge roller 56 to reduce the reduction ratio. A degree of freedom may be given to the setting.
[0048]
Further, the cylindrical surface of the discharge roller 56 is formed of a high friction member such as rubber, and the conveying force is applied to the sheet or the sheet bundle sandwiched between the two by the self-weight or the urging force of the pressure roller 57 which is a driven roller. Can occur.
[0049]
3.3 Processing mechanism
As shown in FIG. 6, the hitting roller 12 is given a pendulum motion by a hitting SOL (solenoid) 170 about a fulcrum 12a and intermittently acts on the paper fed into the stapling tray F to cause the paper to be fed to the trailing edge fence. It hits 51. The hitting roller 12 rotates counterclockwise in the drawing.
[0050]
The jogger fence 53 is driven via a timing belt by a jogger motor 158 capable of forward and reverse rotation, and reciprocates in the paper width direction.
[0051]
As can be seen from the perspective view showing the stapler S1 of FIG. 8 together with the moving mechanism, the end-face stitching stapler S1 is driven via a timing belt by a forward / reversely movable stapler moving motor 159 to bind a predetermined position of the sheet end. Move in the paper width direction. A stapler movement HP sensor 312 for detecting the home position of the end face binding stapler S1 is provided at one end of the moving range, and the binding position in the paper width direction is the amount of movement of the end face binding stapler S1 from the home position. Controlled by Further, as shown in the perspective view of FIG. 9, the end-face stitching stapler S1 is configured to change only the stitching mechanism portion of the stapler S1 at the home position so that the needle driving angle can be changed parallel to or obliquely with respect to the sheet edge. It is configured so that the staple needle can be easily exchanged by rotating at an angle. The stapler S1 is rotated obliquely by the oblique motor 160, and when the needle replacement position sensor 313 detects that the needle replacement position sensor 313 reaches a predetermined oblique angle or the needle replacement position, the oblique motor 160 stops. When the diagonal strike is finished or the needle exchange is finished, the original position is rotated to prepare for the next staple.
[0052]
As shown in FIGS. 1 and 5, the saddle stitching stapler S2 is a distance in which the distance from the rear end fence 51 to the needle striking position of the saddle stitching stapler S2 corresponds to half of the conveyance direction length of the maximum sheet size that can be saddle stitched. The two are arranged as described above, and two are arranged symmetrically with respect to the alignment center in the paper width direction, and are fixed to the stay 63. Since the saddle stitching stapler S2 itself is a known configuration, a detailed description thereof will be omitted here. However, when performing saddle stitching, the jogger fence 53 aligns the direction perpendicular to the sheet conveyance direction and strikes the trailing edge fence 51. After the conveyance direction of the sheet is aligned by the roller 5, the discharge belt 52 is driven and the trailing end of the sheet bundle is lifted by the discharge claw 52, and the central portion in the conveyance direction of the sheet bundle is located at the binding position of the saddle stitching stapler S2. And then stop at this position to execute the binding operation. Then, the bound sheet bundle is conveyed to the middle folding processing tray G side and folded in half. Details will be described later.
[0053]
In the figure, reference numeral 64a denotes a front side plate, 64b denotes a rear side plate, and reference numeral 310 denotes a paper presence / absence sensor that detects the presence / absence of paper on the staple processing tray F.
[0054]
4). Paper bundle deflection mechanism
The sheet bundle that has undergone saddle stitching in the staple processing tray F is folded in the middle of the sheet. This middle folding is performed in the middle folding processing tray G. For this purpose, it is necessary to transport the bound sheet bundle to the middle folding processing tray G. In this embodiment, a sheet bundle deflecting unit is provided on the most downstream side in the conveyance direction of the staple processing tray F, and conveys the sheet bundle to the middle folding processing tray G side.
[0055]
The sheet bundle deflection mechanism includes a branch guide plate 54 and a movable guide 55 as shown in the enlarged views of the staple processing tray F and the middle folding processing tray G in FIGS.
[0056]
As shown in the operation explanatory diagrams of FIGS. 10 to 13, the branch guide plate 54 is provided so as to be swingable in the vertical direction around the fulcrum 54 a, and a rotatable pressure roller 57 is provided on the downstream side thereof. The pressure is applied to the discharge roller 56 side. Further, the position of the branch guide plate 54 is defined by the contact position with the cam surface 61 a of the cam 61 that rotates by obtaining a driving force from the bundle branch drive motor 161.
[0057]
The movable guide 55 is swingably supported on a rotating shaft of the discharge roller 56 together with a driven pulley 60 that swings integrally with the movable guide 55, and a drive pulley 171 a provided on the drive shaft of the movable guide drive motor 171. Is driven by a timing belt 59 that is stretched between and the stop position is defined. The movable guide 55 can detect the home position by detecting the shielding portion 55b by the movable guide home position sensor 337, and the stop position by the drive pulse of the movable guide drive motor 171 with the detected home position as a reference. Can be controlled.
[0058]
The bundle branching guide HP sensor 315 detects the shield 61c of the cam 61 and detects the home position of the cam 61. Accordingly, the cam 61 controls the stop position by counting the drive pulses of the bundle branching drive motor 161 with the home position as a reference. The opening / closing amount of the branch guide plate 54 is determined by the stop position of the cam 61. That is, the opening / closing amount is set according to the drive pulse of the bundle branching drive motor 161, and the interval between the discharge roller 56 and the pressure roller 57 can be freely set according to the set value. This control will be described later.
[0059]
FIG. 10 is an operation explanatory view showing the positional relationship between the branch guide plate 54 and the movable guide 55 when the cam 61 is located at the home position. The guide surface 55a of the movable guide 55 is formed in a curved surface spaced from the surface of the discharge roller 56 at a predetermined interval. The downstream side of the discharge roller 56 in the sheet conveyance direction from the pressure roller 57 installation portion of the branch guide plate 54 is formed. It is formed in a curved surface according to the curvature of the surface, but the upstream side is formed in a flat shape and has a function of guiding the paper in the path to the shift paper discharge roller 6. This state is a state when the sheet bundle is fed into the conveyance path C, and the movable guide 55 is sufficiently retracted from the path through which the sheet bundle is fed from the staple processing tray F to the conveyance path C, and the branch guide plate 54 is also formed. The path is sufficiently retracted from the surface of the discharge roller 56 and the path for feeding the sheet bundle from the staple processing tray F to the transport path C is sufficiently opened. The open width is generally determined by the binding capability of the end-face stitching stapler S1, but is generally 50 sheets or less of copy paper having a normal thickness. The position of the movable guide 55 in FIG. 10 corresponds to the first position in the first means.
[0060]
The guide surface 55a on the side of the movable guide 55 facing the discharge roller 56 receives the leading end of the sheet whose direction has been changed by the branch guide plate 54, and enables a hairpin turn with a small diameter R.
[0061]
FIG. 11 is an operation explanatory view showing a state when the movable guide driving motor 171 rotates and the movable guide 55 comes to a position where the sheet bundle is conveyed to the middle folding processing tray G side. In this state, the branch guide plate 54 is still at the home position and has not started to rotate.
[0062]
In FIG. 12, the bundle branch drive motor 161 is rotated by a predetermined pulse drive from the home position, the cam 61 is rotated by a predetermined amount, the branch guide plate 54 is rotated in the counterclockwise direction, and the pressure roller 57 is moved to the discharge roller 56. It is operation | movement explanatory drawing which shows the state spaced apart with the micro distance from the surface. This position is the third position referred to as the first means, and the sheet bundle is guided between the pressure roller 57 and the discharge roller 56 between the movable guide 55 and the discharge roller 56, and is folded from the staple processing tray F. The sheet bundle is conveyed to the processing tray G side. That is, a conveyance path for guiding the sheet bundle from the staple processing tray F to the middle folding processing tray G side is formed between the branch guide plate 54 and the movable guide 55 and the discharge roller 56.
[0063]
FIG. 13 is an operation explanation showing a state in which the branch guide plate 54 is further rotated counterclockwise in the drawing as the cam 61 is further rotated, and the pressure roller 57 is pressed against the discharge roller 56. In the figure, the applied pressure is determined by the elastic force of the spring 58. FIG. 5 shows the positional relationship in the depth direction.
[0064]
Note that FIG. 10 is a position where a sheet subjected to alignment, stapling, and the like in the staple processing tray F is sent to the conveyance path C that leads to the shift tray 202, and FIGS. This is the position where the paper can be fed. Further, at the position shown in FIG. 13, the space where the movable guide 55 rotates can be closed by the movable guide side surface 55a. Accordingly, when the sheet is guided to the middle folding processing tray G, it can be smoothly fed. Thus, by arranging the order of the operations of the branch guide plate 54 and the movable guide 55, it is possible to overlap each other and form a smooth conveyance path.
[0065]
In this state, compared to the open state of the branch guide plate 54 shown in FIG. 10, the surface of the discharge roller 56 is pressed against the surface of the discharge roller 56 from an oblique direction with respect to the conveyance direction of the sheet bundle, so It is regulated and guided to the pressure roller 57 position. When the sheet bundle is conveyed to the half-folding processing tray G side, the central portion of the sheet bundle is bound and the leading end portion of the sheet bundle is in a free state. The pressure is introduced by the gap between the movable guide 55 and the discharge roller 66. As a result, the leading end of the sheet bundle does not become scattered but enters the gap between the movable guide 55 and the discharge roller 66, is turned (deflected) by the movable guide 55, and is conveyed to the middle folding processing tray G side. Therefore, the conveyance angle can be freely set by the angle θ of the movable guide 55, in other words, the length of the movable guide 55 in the circumferential direction. However, the limit is about 180 ° in relation to other mechanisms.
[0066]
The transport path can be changed by, for example, the branch claws 15 and 16 shown in FIG. 1, but the branch claws themselves do not have a transport force, so that several to several tens of sheets can be bundled at a large angle. If it is changed, a jam often occurs due to a difference in frictional force between the outer peripheral side and the inner peripheral side, and the branching claw is not suitable for deflection at a large angle of 90 ° or more.
[0067]
Further, as will be described later, as shown in FIG. 12, a predetermined gap is provided between the pressure roller 57 and the discharge roller 56, and after the paper bundle has passed a predetermined amount, the paper roller is pressed by the pressure roller 57. Thus, since the load when entering the gap can be reduced, it is possible to deflect without disturbing the leading edge of the sheet bundle, and jamming at the time of deflection of the sheet bundle can be minimized.
[0068]
In this embodiment, the branch guide plate 54 and the movable guide 55 are operated by separate drive motors. For example, the rotation guide 55 also uses a drive force transmission mechanism such as a cam or a link, and the branch guide is driven by one drive motor. It is also possible to drive 54 and the movable guide 55.
[0069]
5). Folding tray
5.1 Configuration of each part
14 and 15 are explanatory views of the operation of the moving mechanism of the folding plate 74 for performing the middle folding.
[0070]
The folding plate 74 is supported by loosely fitting the long hole portions 74 a to the two shafts 64 c erected on the front and rear side plates 64 a and 64 b, and the shaft portion 74 b erected from the folding plate 74 is further linked to the link arm 76. When the link arm 76 swings about the fulcrum 76a, the folding plate 74 reciprocates left and right in FIGS. 14 and 15. That is, the shaft portion 75b of the folding plate driving cam 75 is loosely fitted in the long hole portion 76c of the link arm 76, and the link arm 76 swings due to the rotational movement of the folding plate driving cam 75. 16, the folding plate 74 reciprocates in a direction perpendicular to the upper and lower bundle conveyance guide plates 91 and 92.
[0071]
The folding plate driving cam 75 is rotated in the direction of the arrow in FIG. The stop position is determined by detecting both end portions of the half-moon shaped shielding portion 75a by the folding plate HP sensor 325.
[0072]
FIG. 14 shows the home position position completely retracted from the sheet bundle accommodation area of the processing tray G. When the folding plate drive cam 75 is rotated in the direction of the arrow, the folding plate 74 moves in the direction of the arrow and protrudes into the sheet bundle accommodation area of the processing tray G. FIG. 15 shows a position where the center of the sheet bundle of the processing tray G is pushed into the nip of the folding roller 81. When the folding plate drive cam 75 is rotated in the direction of the arrow, the folding plate 74 moves in the direction of the arrow and retracts from the sheet bundle accommodation area of the processing tray G.
[0073]
In this embodiment, it is assumed that the sheet folding is performed by folding the sheet bundle. However, the present invention can be applied to the case of folding one sheet. In this case, since only one sheet does not require saddle stitching, when one sheet is discharged, the sheet is fed to the middle folding processing tray G side, folded by the folding plate 74 and the folding roller, and discharged to the lower tray. To do.
[0074]
5.2 Arrangement
FIG. 17 is a perspective view of a main part of the support mechanism according to this embodiment in which the staple processing tray F and the middle folding processing tray G shown in FIG. 16 are integrally pulled out so that jam processing, component maintenance, or replacement can be performed. FIG.
[0075]
In this embodiment, the staple processing tray F and the middle folding processing tray G are arranged in a state where the middle folding processing tray G side is vertically inclined and the staple processing tray F side is inclined at a steep angle with the arc of the surface of the discharge roller 56 as a bent portion. Is integrated. Although only the end face is shown in FIG. 17, the staple processing tray F and the middle folding processing tray G corresponding to at least the width of the staple processing tray F shown in FIG. A smaller inclination angle of the staple processing tray F is desirable because the vertical projection area becomes smaller and the occupied floor area becomes smaller. However, in this embodiment, the folding mechanism shown in FIGS. 14 and 15, that is, the folding plate 74, the link arm 76, the folding plate drive cam 75, and the folding plate drive motor 166 are arranged in the middle folding processing tray G (bundle conveyance guide). It is provided in a space between the upper plate 91, 92) and the staple processing tray F. At this time, these folding mechanisms are positioned between the end-face stitching stapler S1 and the saddle stitching stapler S2. Then, the inclination angle of the staple processing tray F with respect to the middle folding processing tray G is set to the minimum angle at which any of the components of the folding mechanism and any of the components of the staple processing tray F do not interfere. By providing the folding mechanism below the steep processing tray F provided in such a manner as described above, it is possible to arrange the stapling processing tray F, the middle folding processing tray G, and the folding means within the minimum vertical projection area. become.
[0076]
In the case of half-folding, as will be described later in the operation section, it is necessary to position the central portion of the sheet bundle at a position where the sheet is folded. Therefore, in this embodiment, a movable rear end fence 73 is provided under the bundle conveyance guide plate 91, and the rear end of the sheet bundle (the rear end after folding processing, which becomes the front end during conveyance) is brought into contact with the movable rear end fence 73. In this contacted state, the sheet bundle is moved up and down to control the center of the sheet bundle at the folding position.
[0077]
The movable rear end fence 73 is fixed to a drive belt 73c stretched between a drive pulley 73a and a driven pulley 73b, and is driven in the vertical direction by a rear end fence moving motor (not shown). The driving mechanism of these movable rear end fences 73 is arranged in the space between the staple processing tray F and the middle folding processing tray G, and is designed so as not to increase the vertical projection area, similarly to the folding mechanism described above. Yes.
[0078]
The unit U composed of the staple processing tray F and the center folding processing tray G set in such a relative relationship is attached to two support rails 66 provided in the depth direction from the opening 67 of the sheet post-processing apparatus PD in FIG. Support it so that it can be pulled out toward you. Further, the upper bundle conveying guide plates 91 and 92 are attached with the near side open at the back side of the unit U via a hinge (not shown). Further, for example, a magnet is used as an open end lock.
[0079]
With this configuration, when a paper jam occurs, the unit U can be pulled out and jammed. At that time, if a paper jam occurs on the middle folding processing tray G side, when the unit U is pulled out about half, the upper bundle conveying guide plates 91 and 92 are opened to perform the jam processing. Jam processing is possible in a short time. When the jam processing is completed, if the unit U is pushed in, the upper and lower bundle conveyance guide plates 91 and 92 abut against the edge of the opening 67 and are automatically closed, and are automatically locked by the magnet. The situation that the process cannot proceed to the next process is not caused by forgetting to close the lower bundle conveyance guide plates 91 and 92.
[0080]
In the embodiment shown in FIG. 17, the two support rails 66 are provided on the middle folding tray G side of the opening 66, but may be provided at the upper part or at other parts. Appropriate placement locations are appropriately set according to the placement positions of the respective parts of the unit U.
[0081]
In this embodiment, as described above, the inclination angle of the staple processing tray F is large due to the relationship between the center folding processing tray G and the folding mechanism, and conversely, the angle between the staple processing tray F and the middle folding processing tray G. Is set as small as possible and arranged diagonally. In this case, considering the space utilization efficiency, the middle folding processing tray G is disposed on the lower side of the staple processing tray F as described above, so that the space on the upper side of the staple processing tray F can be used. It becomes a problem. Therefore, in this embodiment, the conveyance path D and the sheet storage portion E are provided so as to be parallel to the staple processing tray F, respectively, and further, the waste receiver 101a of the punch waste unit 101 is provided in the space corresponding to the upper right in FIG. It is extended diagonally for efficient space use.
[0082]
As a result, when the paper is reversed in the paper storage unit E, if the paper size is large, the paper storage unit E waits for the arrival of the next paper in a state where the rear end of the paper conveyance direction protrudes from the paper reversal unit E. Since it is disposed at the upper right of the post-processing apparatus PD, a sufficient space can be secured on the lower side, and there is no possibility of paper jam.
[0083]
Moreover, since the folding mechanism is provided between the end-face stitching stapler S1 and the saddle stitching stapler S2 in the middle folding processing tray G, a sufficient space can be provided below the folding plate 74 even if the paper size is large. Even when transported vertically by the bundle transport guide plate lower upper portions 91 and 92, a sufficient space can be secured below the front end of the sheet.
[0084]
6). Control device
As shown in FIG. 18, the control device 350 is composed of a microcomputer having a CPU 360, an I / O interface 370, etc., and each switch of the control panel of the image forming apparatus PR main body, an inlet sensor 301, and an upper discharge sensor 302. , Shift discharge sensor 303, pre-stack sensor 304, staple discharge sensor 305, paper presence sensor 310, discharge belt home position sensor 311, staple movement home position sensor 312, stapler oblique home position sensor 313, jogger fence home position sensor 314 , Bundle branch guide home position sensor 315, bundle arrival sensor 321, movable rear end fence home position sensor 322, folding section passage sensor 323, lower sheet discharge sensor 324, folding plate home position Yonsensa 325, the sheet sensor 330,330A, 330b, signals from the sensors such as the sheet discharge guide plate close sensor 331 is inputted to the CPU360 through the I / O interface 370.
[0085]
The CPU 360 drives the tray lifting / lowering motor 168 for the shift tray 202, the discharge guide plate opening / closing motor 167 for opening / closing the opening / closing guide plate, the shift motor 169 for moving the shift tray 202, and the tapping roller 12 based on the input signal. The unillustrated tapping roller motor, solenoids such as tapping SOL 170, a conveying motor for driving each conveying roller, a discharging motor for driving each discharging roller, a discharging motor 157 for driving the discharging belt 52, and an end face binding stapler S1 are moved. A stapler moving motor 159, an oblique motor 160 that obliquely rotates the end-face stitching stapler S1, a jogger motor 158 that moves the jogger fence 53, a bundle branch drive motor 161 that rotates the branch guide plate 54 and the movable guide 55, and conveys the bundle. (Not shown) Conveying motor, the rear end fence moving motor, the folding moves the folding plate 74 plate drive motor 166 (not shown) for moving the movable rear fence 73, and controls the driving such as the folding roller drive motor (not shown) that drives the folding rollers 81. A pulse signal of a not-shown staple conveyance motor that drives the staple discharge roller is input to the CPU 360 and counted, and the hitting SOL 170 and the jogger motor 158 are controlled according to this count.
[0086]
The punch unit 100 also performs drilling according to instructions from the CPU 360 by controlling the clutch and the motor.
[0087]
The sheet post-processing device PD is controlled by the CPU 360 executing a program written in a ROM (not shown) while using a RAM (not shown) as a work area.
[0088]
7). Action
Hereinafter, the operation of the sheet post-processing apparatus according to this embodiment executed by the CPU 360 will be described.
[0089]
7.1 Operation according to processing mode
In the present embodiment, the following discharge mode is adopted according to the post-processing mode.
[0090]
(1) Non-stipple mode A:
In this mode, the sheet is discharged from the conveyance path A through the conveyance path B to the upper tray 201 without binding. In this mode, the branching claw 15 rotates clockwise in FIG. 1, and the conveyance path B side is opened. The processing procedure at this time is shown in the flowchart of FIG.
[0091]
In this mode, when the operation is started and the sheet is brought in from the image forming apparatus PR side, the entrance roller 1 and the transport roller 2 of the transport path A of the sheet post-processing apparatus PD, the transport roller 3 of the transport path B, and Each of the upper paper discharge rollers 4 starts to rotate (step S101). Then, the entrance sensor 301 is turned on / off (steps S102, S103) and the upper paper discharge sensor 302 is turned on / off (steps S104, S105) to confirm the passage of the sheet, and the final sheet passes (step). S107) When a predetermined time has elapsed, the rotation of the rollers, that is, the entrance roller 1, the transport roller 2, the transport roller 3, and the upper paper discharge roller 4 is stopped. As a result, all the sheets carried in from the image forming apparatus are discharged and stacked on the upper tray 201 without being bound. In this embodiment, since the punch unit 100 is provided between the entrance roller 1 and the transport roller 2, the punch unit 100 can also punch holes during this time.
[0092]
(2) Non-stipple mode B:
In this mode, the sheet is discharged from the conveyance path A to the shift tray 202 via the conveyance path C without binding the sheets. In this mode, the branch claw 15 rotates counterclockwise and the branch claw 16 rotates clockwise, and the conveyance path C is opened. The processing procedure at this time is shown in the flowchart of FIG.
[0093]
In this mode, when the operation is started and the sheet is brought in from the image forming apparatus PR side, the entrance roller 1 and the transport roller 2 in the transport path A of the sheet post-processing apparatus PD, the transport roller 5 in the transport path C, and Each of the shift paper discharge rollers 6 starts to rotate (step S201). Then, the solenoid that drives the branch claws 15 and 16 is turned on (step S202), and the branch claws 15 are rotated counterclockwise and the branch claws 16 are rotated clockwise. Next, the entrance sensor 301 is turned on and off (steps S203 and S204) and the shift paper discharge sensor 303 is turned on and off (steps S205 and S206) to check the passage of the loaded paper.
[0094]
When the final sheet passes (step S207) and a predetermined time elapses, the rotation of each of the rollers, that is, the entrance roller 1, the conveyance roller 2, the conveyance roller 5, and the shift discharge roller 6 is stopped (step S208). The solenoid that drives the branch claws 15 and 16 is turned off (step S209). As a result, all the sheets carried in from the image forming apparatus PR are discharged and stacked on the shift tray 202 without being bound. In this embodiment, since the punch unit 100 is provided between the entrance roller 1 and the transport roller 2, the punch unit 100 can also punch holes during this time.
[0095]
(3) Sort, stack mode:
In this mode, the sheet is discharged from the conveyance path A to the shift tray 202 via the conveyance path C. At this time, the shift tray 202 is swung in a direction orthogonal to the sheet discharge direction at every section separation, In this mode, the sheets discharged onto the shift tray 202 are sorted. In this mode, similarly to the non-stipple mode B, the branching claw 15 rotates counterclockwise and the branching claw 16 rotates clockwise, and the conveyance path C is opened. The processing procedure at this time is shown in the flowchart of FIG.
[0096]
In this mode, when the operation is started and the sheet is brought in from the image forming apparatus PR side, the entrance roller 1 and the transport roller 2 in the transport path A of the sheet post-processing apparatus PD, the transport roller 5 in the transport path C, and Each of the shift paper discharge rollers 6 starts to rotate (step S301). Then, the solenoid for driving the branch claws 15 and 16 is turned on (step S302), and the branch claws 15 are rotated counterclockwise and the branch claws 16 are rotated clockwise. Then, it is checked whether the entrance sensor 301 is on or off (steps S303 and S304) and the shift paper discharge sensor 303 is on (step S305).
[0097]
As a result of this check, if the paper that has passed through the shift paper discharge sensor 303 is the first paper in the set (step S306-Y), the shift motor 169 is turned on (step S307), and the shift sensor 336 detects the shift tray 202. The shift tray 202 is moved in the direction orthogonal to the sheet conveyance direction (step S309). Then, the paper is discharged to the shift tray 202, the shift paper discharge sensor 303 is turned off, and when the paper is confirmed to pass through the shift paper discharge sensor 303 (step S310), it is checked whether the paper is the final paper. (Step S311). If it is not the final sheet, it is the first sheet in this case, so if it is not one sheet, the process returns to step S303 and the subsequent processing is repeated. If the section is composed of one sheet, the process of step S312 is executed. To do. On the other hand, if the paper that has passed through the shift paper discharge sensor 303 in step S306 is not the first paper in the copy, the shift tray 202 has already moved, and the paper is discharged as it is (step S310). It is checked whether it is paper (step S311). If it is not the final sheet, the processing from step S303 is repeated on the next sheet. If it is the final sheet (step S311-Y), the rollers, Then, the rotation of the entrance roller 1, the transport roller 2, the transport roller 5, and the shift paper discharge roller 6 is stopped (step S312), and the solenoid that drives the branch claws 15 and 16 is turned off (step S313). As a result, all the sheets carried in from the image forming apparatus are discharged onto the shift tray 202 without being bound, sorted, and stacked. In this case as well, the sheets punched by the punch unit 100 can be sorted and stacked.
[0098]
(4) Stipple mode:
In this mode, the sheet is conveyed to the staple processing tray F through the conveyance path A and the conveyance path D, and after alignment and binding processing are performed on the staple processing tray F, the sheet is discharged to the shift tray 202 through the conveyance path C. It is. In this mode, both the branch claw 15 and the branch claw 16 rotate counterclockwise, and the path from the transport path A to D is opened. The processing procedure at this time is shown in FIG.
[0099]
In this mode, when the operation starts and the sheet is brought in from the image forming apparatus side PR, the entrance roller 1 and the transport roller 2 of the transport path A of the sheet post-processing apparatus PD, the transport roller 7 of the transport path D, 9, 10 and the staple discharge roller 11 and the hitting roller 12 of the staple processing tray F start to rotate (step S401). Then, the solenoid that drives the branch claw 15 is turned on (step S402), and the branch claw 15 is rotated counterclockwise.
[0100]
Next, the end surface binding stapler S1 is detected by the stapler movement HP sensor 312, and after confirming the home position, the stapler movement motor 159 is driven to move the end surface binding stapler S1 to the binding position (step S403). The home position of the discharge belt 52 is also detected by the discharge belt HP sensor 311, and after confirming the position, the discharge motor 157 is driven to move the discharge belt 52 to the standby position (step S404). Further, the jogger fence 53 is also moved to the standby position after the home position position is detected by the jogger fence HP sensor (step S405). Further, the branch guide plate 54 and the movable guide 55 are moved to the home position (step S406).
[0101]
If the entrance sensor 301 is turned on / off (steps S407 and S408), the staple paper discharge sensor 305 is turned on (step S409), and the shift paper discharge sensor 303 is turned off (step S410), paper is loaded on the staple processing tray F. Since the sheet is discharged and the sheet is present, the tapping solenoid 170 is turned on for a predetermined time, the tapping solenoid 12 is brought into contact with the sheet, and is urged toward the rear end fence 51 to align the rear end of the sheet (step S411). . Next, the jogger motor 158 is driven to move the jogger fence 53 inward by a predetermined amount to perform the alignment operation in the paper width direction (direction perpendicular to the paper transport direction), and then return to the standby position (step S412). . As a result, the vertical and horizontal directions of paper fed to the staple processing tray F (the direction perpendicular to the direction parallel to the transport direction) are aligned. The operations from step S407 to step S413 are repeated for each sheet, and when the final sheet of the sheet is reached (step S413-Y), the jogger fence 53 is moved inward by a predetermined amount so that the sheet end face is not displaced (step S414). In this state, the end face binding stapler S1 is turned on to execute the end face binding (step S415).
[0102]
On the other hand, the shift tray 202 is lowered by a predetermined amount (step S416) to secure a paper discharge space, the shift paper discharge motor is driven to start the rotation of the shift paper discharge roller 6 (step S417), and the discharge motor 157 is further turned on. The discharge belt 52 is turned on and rotated by a predetermined amount (step S418), and the bound sheet bundle is pushed up in the direction of the conveyance path C. As a result, the sheet bundle is sandwiched between the nips of the shift sheet discharge roller 6 and the sheet discharge operation to the shift tray 202 is performed. Then, the shift paper discharge sensor 303 is turned on (step S419), the sheet bundle enters the sensor 303 position, and it is confirmed that the shift paper discharge sensor 303 is turned off and the sheet bundle has passed the sensor 303 position. (Step S420), since the sheet bundle has been discharged to the shift tray by the shift discharge roller 6, the discharge belt 52 and the jogger fence 53 are moved to the standby position (Steps S421 and S422). Then, the rotation of the shift paper discharge roller 6 is stopped after a predetermined time (step S423), and the shift tray 202 is raised to the paper receiving position (step S424). This rising position is controlled by detecting the upper surface of the uppermost sheet of the stack of sheets stacked on the shift tray 202 by the paper surface detection sensor 330. These series of operations are repeated until the final part of the job (step S425).
[0103]
In the final part, the end-face stitching stapler S1, the discharge belt 52, and the jogger fence 53 are moved to their home positions (steps S426, S427, and S428), the entrance roller 1, the transport rollers 2, 7, 9, and 10, and the staples. The rotation of the discharge roller 11 and the hitting roller 12 is stopped (step S429), the branch solenoid of the branch claw 15 is turned off (step S430), and all the processing is returned to the initial state and the process is finished.
[0104]
In this way, the sheets carried in from the image forming apparatus are bound by the staple processing tray F, discharged onto the shift tray 202, and stacked. In this case as well, it is possible to bind the paper punched by the punch unit 100.
[0105]
The operation of the stipple processing tray F in the stipple mode will be described in more detail.
[0106]
When the stipple mode is selected, as shown in FIG. 6, the jogger fence 53 moves from the home position and waits at a standby position that is 7 mm away from the sheet width discharged to the staple processing tray F (step S405). . When the paper is conveyed by the staple paper discharge roller 11 and the rear end of the paper passes through the staple paper discharge sensor 305 (step S409), the jogger fence 53 moves inward by 5 mm from the standby position and stops.
[0107]
Further, the staple paper discharge sensor 305 detects that when the trailing edge of the paper passes, and the signal is input to the CPU 360. The CPU 360 counts the number of pulses transmitted from a not-shown staple transport motor that drives the staple paper discharge roller 11 from the time of receiving this signal, and hits the SOL 170 after transmitting a predetermined pulse (step S412). The tapping roller 12 performs a pendulum motion by turning on and off the tapping SOL 170. When the tapping roller 12 is on, the tapping roller 12 strikes the paper and returns it to the lower side, and abuts against the rear end fence 51 to align the paper. At this time, every time a sheet stored in the staple processing tray F passes the entrance sensor 301 or the staple discharge sensor 305, the signal is input to the CPU 360, and the number of sheets is counted.
[0108]
After a lapse of a predetermined time after the beating SOL 170 is turned off, the jogger fence 53 is further moved inward by 2.6 mm by the jogger motor 158, temporarily stops, and the horizontal alignment is finished. The jogger fence 53 then moves outward by 7.6 mm, returns to the standby position, and waits for the next sheet (step S412). This operation is performed up to the last page (step S413). After that, it moves again inward by 7 mm and stops (step S414), and both sides of the sheet bundle are pressed to prepare for the stapling operation. Thereafter, after a predetermined time, the end face binding stapler S1 is actuated by a staple motor (not shown), and the binding process is performed (step S415). If two or more bindings are designated at this time, after one binding process is completed, the staple movement motor 159 is driven, and the end face binding stapler S1 is moved to an appropriate position along the rear edge of the sheet. The second stitching process is performed. If the third and subsequent locations are specified, this is repeated.
[0109]
When the binding process is completed, the discharge motor 157 is driven, and the discharge belt 52 is driven (step S418). At this time, the paper discharge motor is also driven, and the shift paper discharge roller 6 starts to rotate so as to accept the sheet bundle lifted by the discharge claw 52a (step S417). At this time, the jogger fence 53 is controlled differently based on the paper size and the number of sheets to be bound. For example, when the number of sheets to be bound is less than the set number or smaller than the set size, the trailing edge of the sheet bundle is hooked and conveyed by the discharge claw 52a while the sheet bundle is pressed by the jogger fence 53.
[0110]
Then, after a predetermined pulse from the detection by the paper presence sensor 310 or the discharge belt HP sensor 311, the jogger fence 53 is retracted by 2 mm, and the restriction on the paper by the jogger fence 53 is released. This predetermined pulse is set after the discharge claw 52a comes into contact with the rear end of the paper and passes through the front end of the jogger fence 53.
[0111]
When the number of sheets to be bound is larger than the set number or larger than the set size, the jogger fence 53 is retracted in advance by 2 mm and discharged. In any case, when the sheet bundle passes through the jogger fence 53, the jogger fence 53 further moves outward by 5 mm and returns to the standby position (step S422) to prepare for the next sheet. It is also possible to adjust the binding force according to the distance of the jogger fence 53 to the paper.
[0112]
(5) Saddle stitch binding mode:
In this mode, the sheet is conveyed to the staple processing tray F via the conveyance path A and the conveyance path D, and after alignment and center binding are performed in the staple processing tray F, the sheet is further folded in the middle folding processing tray G and then folded in half. In this mode, the sheet bundle is discharged to the lower tray 203 through the conveyance path H. In this mode, both the branch claw 15 and the branch claw 16 rotate counterclockwise, and the path from the transport path A to D is opened. Further, the branch guide plate 54 and the movable guide plate 55 are closed as shown in FIGS. 12 and 13 described above or FIGS. 26 and 27 described later, and the sheet bundle is guided to the intermediate folding tray T. Is done. The processing procedure at this time is shown in FIG.
[0113]
In this mode, when the operation is started and the sheet is brought into the state from the image forming apparatus PR side, the entrance roller 1 and the conveyance roller 2 of the conveyance path A of the sheet post-processing apparatus PD, the conveyance roller 7 of the conveyance path D, 9, 10 and the staple discharge roller 11 and the hitting roller 12 of the staple processing tray F start to rotate (step S501). Then, the solenoid for driving the branch claw 15 is turned on (step S502), and the branch claw 15 is rotated counterclockwise.
[0114]
Next, the home position of the discharge belt 52 is also detected by the discharge belt HP sensor 311, and after confirming the position, the discharge motor 157 is driven to place the discharge belt 52 in the standby position, and the jogger fence 53 is also a jogger fence HP sensor. After detecting the home position, the branch guide plate 54 and the movable guide 55 are further moved to the home position, respectively, to the standby position (steps S503, S504, and S505).
[0115]
If the entrance sensor 301 is turned on / off (steps S506 and S507), the staple paper discharge sensor 305 is turned on (step S508), and the shift paper discharge sensor 303 is turned off (step S509), paper is loaded on the staple processing tray F. Since the sheet is ejected and the sheet is present, the tapping solenoid 170 is turned on for a predetermined time, the tapping solenoid 12 is brought into contact with the sheet, and urged toward the rear end fence 51 to align the rear end of the sheet (step S510). . Next, by driving the jogger motor 158, the jogger fence 53 is moved inward by a predetermined amount to perform the aligning operation in the paper width direction (direction orthogonal to the paper transport direction), and then returned to the standby position (step S511). . As a result, the vertical and horizontal directions of paper fed to the staple processing tray F (the direction perpendicular to the direction parallel to the transport direction) are aligned.
[0116]
These operations from step S506 to step S512 are repeated for each sheet, and when the final sheet of the copy is obtained (step S512-Y), the jogger fence 53 is moved inward by a predetermined amount so that the end face of the sheet does not shift (step S513). In this state, the discharge motor 157 is turned on to rotate the discharge belt 52 by a predetermined amount (step S514), and the sheet bundle is raised to the binding position of the saddle stitching stapler S2. Then, the saddle stitching stapler S2 is turned on at the center of the sheet bundle, and saddle stitching is performed (step S515). Next, the branch guide plate 54 and the movable guide 55 are displaced by a predetermined amount to form a path toward the half-folding processing tray G (step S516-FIG. 12). After the rotation of 72 is started and the home position of the movable rear end fence 73 provided on the middle folding processing tray G is detected, the movable rear end fence 73 is moved to the standby position.
[0117]
In this way, when the sheet bundle receiving system of the half-fold processing tray G is prepared, the discharge belt 52 is started to rotate (step S519), and the discharge roller 56 and the pressure roller 57 are caught and the half-fold processing tray. The sheet bundle is conveyed to the G side. The discharge belt 52 is moved by a predetermined amount (step S520), the branch guide plate 54 is displaced by a predetermined amount to be positioned at the position shown in FIG. 13 (step S521), and the leading end of the paper reaches the bundle arrival sensor 321 position (step S522). When the predetermined distance has been conveyed, the rotation of the lower and upper portions 71 and 72 on the bundle conveying roller is stopped (step S523), and the pressure state of the lower bundle conveying roller 72 is released (step S524). Next, the folding operation by the folding plate 74 is started (step S525), and the rotation of the folding rollers 81 and 82 and the lower paper discharge roller 83 is started (step S526). Then, the passage of the folded sheet bundle is monitored by the folding section passage sensor 323 (steps S527 and S528). When the trailing end of the sheet bundle passes through the position of the folding section passage sensor 323 (step S528-Y), the bundle conveyance is performed. The lower roller 72 is pressurized (step S529), and the folding plate 74, the branch guide plate 54, and the movable guide plate 55 are moved to the home position (steps S530 and S531).
[0118]
In this state, the passage of the sheet bundle is monitored by the lower sheet discharge sensor 324 (steps S532 and 533), and when the rear end of the sheet bundle passes through the lower sheet discharge sensor 324 (step S533-Y), the folding rollers 81 and 82, The paper discharge roller 83 is further rotated for a predetermined time and then stopped (step S534). Next, the discharge belt 52 and the jogger fence 53 are moved to the standby position (steps S535 and S536). Then, it is checked whether it is the final part of the job (step S537). If it is not the final part of the job, the process returns to step S506 and the subsequent processing is repeated. (Steps S538 and S539), the rotation of the entrance roller 1, the transport rollers 2, 7, 9, 10, the staple discharge roller 11 and the tapping roller 12 is stopped (step S540), and the branch solenoid of the branch claw 15 is turned off. It is turned off (step S541), and all the processes are returned to the initial state to finish the process.
[0119]
In this way, the sheets carried in from the image forming apparatus are saddle-stitched in the staple processing tray F, folded in the middle folding processing tray G, and then the sheet bundle folded in the lower tray 203 is discharged. To load.
[0120]
8). Operation control of paper bundle deflection mechanism and discharge belt
FIG. 32 is a flowchart showing the processing procedure of the initial processing of the branch guide plate 54. 10 to 13 describe the configuration of the sheet bundle deflection mechanism and the operation of the cam 61, the branch guide plate 54, and the movable guide 55. At this time, the CPU 360 controls the branch guide plate 54 as shown in FIG. Is called.
[0121]
In this process, first, the on / off state of the bundle branch guide home position sensor 315 that detects the shielding part 61c of the cam 61 is checked (step S601), and if it is on, in other words, the shield part 61c is connected to the bundle branch guide home position sensor 315. Is detected (step S601-Y), the bundle branching drive motor 161 is rotated counterclockwise (corresponding to the arrow direction in FIG. 11) (step S602). When the bundle branch guide home position sensor 315 is turned off (step S603-Y), the bundle branch drive motor 161 is stopped (step S604). This state is the state of FIG.
[0122]
On the other hand, if the bundle branch guide home position sensor 315 is OFF in step S601, the bundle branch drive motor 161 is rotated in the clockwise direction (corresponding to the counter arrow direction in FIG. 11) (step S605), and the bundle branch guide home position sensor is detected. When 315 is turned on (step S606-Y), the bundle branch drive motor 161 is stopped (step S607), and further driven counterclockwise (step S602), the bundle branch guide home position sensor 315 is turned off. Is stopped (steps S603 and S604). Thereby, the initial position of the cam 61, in other words, the initial position of the branch guide plate 54 is set.
[0123]
FIG. 33 is a flowchart showing a processing procedure for initial processing of the movable guide 55. The configuration of the sheet bundle deflection mechanism and the operation of the cam 61, the branch guide plate 54, and the movable guide 55 have been described with reference to FIGS. 10 to 13. The control of the movable guide 55 of the CPU 360 at this time is performed as shown in FIG. .
[0124]
In this process, first, the on / off state of the movable guide home position sensor 337 that detects the shielding portion 55b of the movable guide 55 is checked (step S701), and if it is on, in other words, the shielding portion 55b is moved by the movable guide home position sensor 337. If detected (step S701-Y), the movable guide drive motor 171 is rotated counterclockwise (corresponding to the arrow direction in FIG. 11) (step S702). Then, when the movable guide home position sensor 337 is turned off (step S703-Y), the movable guide drive motor 171 is stopped (step S704). This state is the state of FIG.
[0125]
On the other hand, if the movable guide home position sensor 337 is OFF in step S701, the movable guide drive motor 171 is rotated clockwise (corresponding to the counter-arrow direction in FIG. 11) (step S705), and the movable guide home position sensor 337 is moved. When it is turned on (step S706-Y), the movable guide drive motor 171 is stopped (step S707) and further driven counterclockwise (step S702). When the movable guide home position sensor 337 is turned off. Stop (steps S703, S704). Thereby, the initial position of the movable guide 55 is set.
[0126]
9. Details of binding operation and folding operation in the middle folding mode
The binding operation and folding operation in the middle folding mode will be described in more detail.
[0127]
The paper sorted by the branching claw 15 and the branching claw 16 from the conveyance path A is guided to the conveyance path D and discharged to the staple processing tray F by the conveyance rollers 7, 9 and 10 and the staple discharge roller 11. In the staple processing tray F, the sheets sequentially discharged by the discharge rollers 11 are aligned in the same manner as in the stipple mode (4), and the same operation is performed until just before stapling (see FIG. 24). Thereafter, as shown in FIG. 25, the sheet bundle is conveyed downstream in the conveying direction by a distance set for each sheet size by the discharge claw 52a, and the center thereof is bound by the saddle stitching stapler S2.
[0128]
Next, the movable guide 55 is rotated and set at a position where the movable guide 55 is deflected to the lower conveyance path, and the branch guide plate is closed by a predetermined amount, and the discharge roller 56 and the pressure roller 57 are set at a position separated by a small distance (FIG. 26). This minute distance is set so as to change stepwise according to the number of sheets and to be smaller than the thickness of the sheet bundle. For example, as shown in the flowchart of FIG. 34, first, the number of sheets to be bound is checked (step S801). When the number of sheets to be bound is 2 to 5, there is no gap (step S802). (S803, S804) The drive motor pulses P1, P2, and P3 are set so that 10 mm or more is 1 mm (steps S803 and 805) (steps S802, 803, and 804). In this way, it is possible to change in stages according to the number of sheets.
[0129]
Thereafter, the bound sheet bundle starts to be transferred downstream by the discharge claw 52a. At that time, when the leading edge of the sheet bundle passes through the nip between the pressure roller pair 57 and the discharge roller 55 for a predetermined distance, the branch guide plate 54 is further closed. Thus, the discharge roller 56 and the pressure roller 57 are brought into a pressurized state. This timing is managed by the drive pulse of the discharge motor 157 set for each paper size. Thereby, the passing distance is set to be equal regardless of the size.
[0130]
For example, the HP sensor 311 of the discharge belt 52 provided with the discharge claw 52a has a moving distance L1 to the roller pair (56, 57), and the predetermined passing distance is 5 mm. When the distance to the rear end is Lh, the operation timing is determined by the distance Ln that the discharge claw 52a has moved from the HP sensor 311 and is controlled by the converted pulse. If Ln is the paper length Lp,
Ln = L1-Lh-Lp + 5mm
Given in. This pulse is set for each size, and control is performed by performing a size check (steps S901, 903, 905) and a pulse setting corresponding to the size (steps S902, 904, 906) as shown in the flowchart of FIG. Thus, the pressure can be applied at the same timing regardless of the size.
[0131]
In this embodiment, the pulse control from the HP sensor 311 of the discharge belt 52 is described as an example. In this case, control is possible regardless of the size information from the main body.
[0132]
Thereafter, as shown in FIG. 27, the leading end of the sheet bundle is sandwiched between the discharge roller 56 and the pressure roller 57, and the middle guide plate 54 and the movable guide 55 are rotated to rotate the middle portion formed as described above. In order to pass the route guided to the folding processing tray G, the paper is again conveyed downstream by the discharge claw 52a and the discharge roller 56. The discharge roller 56 is provided on the drive shaft of the discharge belt 52 and is driven in synchronization with the discharge belt 52.
[0133]
The discharge roller 56 is provided on the drive shaft (discharge shaft) 65 of the discharge belt 52 as described above, and is driven in synchronization with the discharge belt 52. Then, as shown in FIG. 28, the sheet bundle is moved from the home position to the position corresponding to the sheet size in advance by the upper bundle conveying roller 71 and the lower bundle conveying roller 72 to guide the lower end surface. It is transported to the stopped movable rear end fence 73. At this time, the discharge claw 52a stops at the position where the other discharge claw 52a ′ arranged at the position facing the outer periphery of the discharge belt 52 reaches the vicinity of the rear end fence 51, and the branch guide plate 54 and the movable guide 55 returns to the home position and prepares for the next sheet.
[0134]
As shown in FIG. 29, the sheet bundle abutted against the movable rear end fence 73 is released from the pressurization of the lower bundle conveying roller 72, and then the vicinity of the stapled needle portion is folded as shown in FIG. The plate 74 is pushed in a substantially right angle direction and guided to the nip of the opposing folding roller 81. The folding roller 81 rotating in advance folds the center of the sheet bundle by conveying the sheet bundle guided to the nip under pressure.
[0135]
Then, as shown in FIG. 31, the folded sheet bundle is strengthened by the second folding roller 82 provided in the transport path H, and is discharged to the lower tray 203 by the lower paper discharge roller 83. . At this time, when the rear end of the sheet bundle is detected by the folding portion passage sensor 323, the folding plate 74 and the movable rear end fence 73 are returned to the home position, and the pressurization of the lower bundle conveying roller 72 is restored, and the next sheet is detected. Prepare for. If the next job is the same sheet size and the same number of sheets, the movable rear end fence 73 may stand by at that position.
[0136]
As shown in FIGS. 30 and 31, the middle folding is performed by the folding plate 74 and the first and second folding rollers 81 and 82. As shown in FIG. 1, the second folding roller 82 and the lower sheet discharge are performed. The roller 83 is provided at a position protruding laterally from the casing side surface SBA of the base of the end fence 32 or the shift tray 202, and the front end portion of the lower tray 203 is the same as the vertically lower side of the front end portion of the shift tray 202. It is located on the sheet post-processing apparatus PD main body side from the position or the same position, and is intended to prevent the vertical projection area from becoming larger than the vertical projection area defined by the shift tray 202.
[0137]
Further, the second folding roller 82 and the lower paper discharge roller 83 described above are protruded to the side of the housing side plate SBA, and sufficient folding processing can be performed by a plurality of folding rollers. At that time, since the size of the sheet bundle is halved by the middle folding, the tray size of the lower tray 203 may be half that of the maximum processing size, and the front end of the lower tray 203 is moved to the front end of the shift tray 202 as described above. The installation space for the folding roller 82 and the lower paper discharge roller 83 can be easily secured without protruding from the portion. Therefore, the housing side surface SBB below the maximum lowered position of the shift tray 202 protrudes to the side of the installation space from the housing side surface SBA. Accordingly, a folding mechanism having a sufficient folding function can be provided below the sheet post-processing apparatus PD main body without increasing the vertical projection area.
[0138]
Further, since the vertical stroke of the shift tray 202 can be ensured from just above the discharge port of the folded sheet bundle to just below the discharge port from the discharge roller 6, the load amount of the shift tray 202 can also be increased. A sufficient amount of the lower tray 203 can be secured.
[0139]
As described above, according to this embodiment, the staple processing tray F is inclined steeply, and the angle between the staple processing tray F and the middle folding processing tray G is the minimum source, and the middle between the staple processing tray F and the middle folding processing tray G. A folding mechanism for folding is arranged, and the alignment processing and the binding processing at the time of end-face binding and saddle-stitching are performed in the staple processing tray F, and then the sheet bundle is folded at the folding portion, and parallel to each other. Since the processing is made possible, it is possible to eliminate all of the limitations of functions, the decrease in productivity, and the increase in size of the apparatus, which are the conventional drawbacks, and to provide a paper processing apparatus that saves space and is highly productive.
[0140]
Further, by separating the end-face stitching stapler S1 and the saddle stitching stapler S2, there is always a stapler suitable for binding processing in the vicinity of the alignment position by the jogger fence 53, and the overall processing time for alignment and binding can be shortened. Productivity can be secured. Further, since the sheet bundle can be freely moved upstream and downstream in the transport direction using the discharge belt 52 and the discharge claw 52a, the binding position can be finely adjusted, and the binding to the position intended by the user is possible. Easy to operate.
[0141]
In addition, the saddle stitching processing and folding processing in the staple processing tray F can be performed by independent processing stations, and it becomes possible to stack and align sheets of the next job even during folding processing that takes relatively long processing time. Productivity can be expected.
[0142]
In addition, since the conventional binding processing tray can be sufficiently secured for the maximum sheet length, the quality of the binding processing can be maintained.
[0143]
Since the movable guide 55, the branch guide plate 54, and the discharge roller 56 constitute a turn portion with a small diameter R, the sheet bundle can be smoothly deflected and conveyed. Thereby, further space saving can be achieved.
[0144]
In a normal case, the sheet bundle is given a conveying force only by the discharge claw 52a. However, when the turn portion has a small diameter R as in the present embodiment, a large conveying force is required to convey the sheet bundle. Therefore, in the present embodiment, a conveyance force can be applied to the sheet bundle by using the rotating discharge roller 56 as a conveyance guide. At that time, since the conveyance guide rotates in the conveyance direction, conveyance resistance can be reduced.
[0145]
Further, since the branch guide plate 54 and the movable guide 55 that can deflect the discharge direction to the shift tray 202 and the middle folding processing tray G are provided downstream of the staple processing tray F, “only I want to perform center binding”, “only center folding” It is possible to answer various user requests such as "I want to do".
[0146]
If only center binding is desired, the center portion of the sheet bundle is bound by the saddle stitch stapler S2 as described above, and then the conveying path C is formed by the discharge claw 52a with the branch guide plate 54 and the movable guide 55 being opened. The sheet is pushed up to the side and discharged from the pair of discharge rollers 6 to the shift tray 202. If only the central folding is desired, the branch guide plate 54 and the movable guide 55 are closed as shown in FIG. 25, the conveyance path on the middle folding processing tray G side is opened, and one sheet is fed from the staple processing tray F. The folding process is performed by the folding plate 74 and the folding rollers 81 and 82. The sheet folded in half is folded in this way and discharged from the lower discharge roller 83 to the lower discharge tray 203. If this is repeated for a set number of sheets, sheets folded one by one are stacked on the lower sheet discharge tray 203.
[0147]
【The invention's effect】
As described above, according to the present invention, when the leading edge of the sheet bundle enters the pair of rollers, it is possible to reduce the pressing force. Pressure can be applied, and the effect of narrowing the transport path can be obtained, so that smooth transport is possible with a relatively simple configuration.
[0148]
Further, even if the sizes are different, the paper transport conditions at the time of entering can be made constant, and the quality can be stabilized.
[0149]
In addition, since the separation distance of the roller pair can be finely adjusted for each number of sheets to be bound, it is possible to set a transport condition suitable for each transport.
[0150]
Furthermore, by setting the separation distance slightly smaller than the thickness of the sheet bundle, it is possible to give a slight conveying force while reducing the load at the time of entry, and further reduce the burden on the discharge claw.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a system configuration of an image processing system including a sheet processing apparatus and an image forming apparatus mainly showing a sheet post-processing apparatus according to an embodiment of the present invention.
FIG. 2 is an enlarged perspective view of a main part showing details of a shift mechanism of the sheet post-processing apparatus according to the embodiment.
FIG. 3 is an enlarged perspective view of a main part of a shift tray lifting mechanism of the paper post-processing apparatus according to the embodiment.
FIG. 4 is a perspective view illustrating a structure of a paper discharge unit to a shift tray of the paper post-processing apparatus according to the embodiment.
FIG. 5 is a plan view of a staple processing tray of the paper post-processing apparatus according to the embodiment when viewed from a direction perpendicular to a paper transport surface.
FIG. 6 is a perspective view showing a staple processing tray and a driving mechanism of the sheet post-processing apparatus according to the embodiment.
FIG. 7 is a perspective view illustrating a sheet bundle discharge mechanism of the sheet post-processing apparatus according to the embodiment.
FIG. 8 is a perspective view showing an end face binding stapler of the sheet post-processing apparatus according to the embodiment together with a moving mechanism.
9 is a perspective view showing an oblique rotation mechanism of the end-face stitching stapler in FIG. 8. FIG.
FIG. 10 is an operation explanatory view of a sheet bundle deflection mechanism of the sheet post-processing apparatus according to the embodiment, and shows a state when a sheet or a sheet bundle is discharged to a shift tray.
11 is an operation explanatory view of the sheet bundle deflecting mechanism of the sheet post-processing apparatus according to the embodiment, showing a state in which the branch guide plate is rotated to the discharge roller side from the state of FIG.
12 is an operation explanatory view of the sheet bundle deflection mechanism of the sheet post-processing apparatus according to the embodiment, in which the movable guide rotates from the state of FIG. 11 to the branch guide plate side and deflects the sheet bundle to the center folding processing tray side. The state which formed the path | route to perform is shown.
FIG. 13 is an operation explanatory view of the folding plate moving mechanism of the sheet post-processing apparatus according to the embodiment, showing a state before entering the middle folding operation.
FIG. 14 is an operation explanatory view of the folding plate moving mechanism of the sheet post-processing apparatus according to the embodiment, showing a state when returning to the initial position after the middle folding.
FIG. 15 is a diagram illustrating details of a staple processing tray and a half-fold processing tray of the sheet post-processing apparatus according to the embodiment.
16 is an explanatory view showing a support mechanism for integrally supporting the unit from the staple processing tray and the center folding processing tray shown in FIG. 15, and a state when the unit is pulled out integrally. FIG.
FIG. 17 is a block diagram mainly illustrating a configuration of a control system of the image forming system according to the embodiment, particularly a control configuration of a sheet post-processing apparatus.
FIG. 18 is a flowchart illustrating a processing procedure of non-stipple mode A in the sheet post-processing apparatus according to the embodiment.
FIG. 19 is a flowchart illustrating a processing procedure of non-stipple mode B in the sheet post-processing apparatus according to the embodiment.
FIG. 20 is a flowchart showing a processing procedure of sort and stack modes in the sheet post-processing apparatus according to the embodiment.
FIG. 21 is a flowchart illustrating a processing procedure in a stipple mode in the sheet post-processing apparatus according to the embodiment.
FIG. 22 is a flowchart illustrating a processing procedure in a saddle stitch binding mode in the sheet post-processing apparatus according to the embodiment.
FIG. 23 is an operation explanatory diagram illustrating a state of a sheet bundle stacked on a staple processing tray in the saddle stitch binding mode.
FIG. 24 is an operation explanatory diagram showing a state when the sheets are stacked on the staple processing tray and saddle stitched in the saddle stitch bookbinding mode.
FIG. 25 is an operation explanatory diagram illustrating a state in which the sheet bundle that has been saddle-stitched by the staple processing tray in the saddle stitch binding mode is deflected by the sheet bundle deflection mechanism;
FIG. 26 is an operation explanatory diagram illustrating a state in which a sheet bundle that is saddle-stitched by the staple processing tray is deflected by a sheet bundle deflection mechanism in the saddle stitch binding mode.
FIG. 27 is an operation explanatory diagram illustrating a state in which the sheet bundle that is saddle-stitched by the staple processing tray is deflected by the sheet bundle deflection mechanism in the saddle stitch bookbinding mode.
FIG. 28 is an operation explanatory diagram illustrating a state when a sheet bundle that is saddle-stitched in the staple processing tray is deflected by the sheet bundle deflection mechanism and sent to the half-fold processing tray in the saddle stitching binding mode.
FIG. 29 is an operation explanatory diagram illustrating a state when the sheet bundle is positioned at the center folding position on the center folding processing tray in the saddle stitch binding mode.
FIG. 30 is an operation explanatory diagram illustrating a state when the middle folding operation is started by operating the middle folding plate in the middle folding processing tray in the saddle stitch binding mode.
FIG. 31 is an operation explanatory diagram illustrating a state when a sheet bundle is folded from a middle folding processing tray by a middle folding roller and discharged in a saddle stitch bookbinding mode.
FIG. 32 is a flowchart showing a processing procedure for branch guide plate initial processing;
FIG. 33 is a flowchart showing a processing procedure for initial processing of a movable guide.
FIG. 34 is a flowchart illustrating a processing procedure of a binding number determination process.
FIG. 35 is a flowchart illustrating a processing procedure of paper size determination processing.
[Explanation of symbols]
6 Shift paper discharge roller
52 Ejection belt
52a Release claw
53 Jogger Fence
54 Branch guide plate
55 Movable guide
56 Discharge roller
57 Pressure roller
58, 59 Spring
60 link arm
61 cam
62 Release belt drive pulley
65 Release shaft (drive shaft)
66 Support rail
73 Movable rear end fence
74 Folding plate
75 Folding plate drive cam
76 Link arm
81 First folding roller
82 Second folding roller
83 Lower transfer roller
91 On the bundle transport guide plate
92 Below the bundle transport guide plate
157 Ejection motor
158 Jogger motor
161 Bundle branch drive motor
166 Folding plate drive motor
202 Shift tray
203 Lower tray
A, B, C, D, H, M
E Paper compartment
F Stipple processing tray
G Folding tray
PD paper post-processing device
PR image forming device
S1 Edge-stitched stapler
S2 saddle stitching stapler

Claims (6)

Processing means for performing a predetermined process on a sheet or a bundle of sheets;
Switching means provided at a branching portion of the plurality of transport paths, for switching the transport direction of the sheet or sheet bundle processed or not processed by the processing means to either the first transport path or the second transport path. When,
In a paper processing apparatus having
The conveyance path formed by the switching means for guiding the paper to the second conveyance path is deflected,
A first position for conveying the sheet to the first conveying path, a second position for conveying the sheet to the second conveying path, the first position, and the first position; Control means for setting to one of the third positions for transporting the sheet to the second transport path in the middle of the two positions ,
The conveyance path formed by the switching means at the third position is set wider in the direction perpendicular to the paper surface of the sheet or sheet bundle than the conveyance path formed by the switching means at the second position . A paper processing apparatus. Processing means for performing predetermined processing on a sheet or a bundle of sheets;
Switching means provided at a branching portion of the plurality of transport paths, for switching the transport direction of the sheet or sheet bundle processed or not processed by the processing means to either the first transport path or the second transport path. When,
In a paper processing apparatus having
A first position for conveying the sheet to the first conveying path, a second position for conveying the sheet to the second conveying path, the first position, and the first position; Control means for setting to any one of the third positions between the two positions;
The switching means is
A first guide member provided so as to be able to swing along the surface with a predetermined distance from the surface of the conveying roller for conveying the sheet or sheet bundle;
Driving means for positioning the first guide member at a first position for guiding the first guide member to the first transport path and a second position for guiding the first guide member to the second transport path;
When the first guide member is positioned at the second position, the sheet or sheet bundle is guided to the gap between the first guide member and the surface of the transport roller on the upstream side in the sheet transport direction. A second guide member that opens the first conveyance path side when positioned at
A pressure roller that is provided in the second guide member and presses the sheet or sheet bundle toward the conveying roller when guiding the sheet or sheet bundle to the second conveying path;
Consists of
The control means, the pressure roller of the transport roller from the predetermined distance paper for you, characterized in that to separate processing apparatus when set to the third position.   When the sheet bundle is conveyed to the second conveyance path side, the control means receives the leading end portion of the sheet bundle at the third position, and the leading end portion of the sheet bundle corresponds to the pressure roller and the conveying roller. The sheet processing apparatus according to claim 2, wherein the second position is set after passing through the nip.   4. The sheet processing apparatus according to claim 3, wherein the setting change timing from the third position to the second position is set to be the same regardless of the size of the sheet bundle.   The sheet processing apparatus according to claim 2, wherein the predetermined distance is set according to the number of sheets to be bound.   6. The sheet processing apparatus according to claim 5, wherein the predetermined distance is set to a smaller distance as the number of sheets to be bound is smaller.

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