JPS63117869A - After treatment device for sheet - Google Patents

Abstract

PURPOSE:To make the accumulation of sheets on a stacker proper by providing a stacker moving mode setting means for varying the moving mode of a stacker based on each mode selected by a mode selecting means and a driving means for driving said stacker with a defined moving mode based on the signal of said setting means. CONSTITUTION:When sheets P from an image forming device is carried out and accumulated in order onto a stacker 5a, as a defined mode for a folding device 1 is selected, a defined moving mode for the stacker is set in accordance with the selected mode. And, the stacker 5a is moved in accordance with the moving mode and, e.g., placed on a defined initial position. Also, the sheets P are carried out being folded into a defined form or without being folded in accordance with the selected mode. Thereupon, e.g., the stacker 5a is lowered by degrees at a defined lowering quantity in accordance with the defined moving mode as the sheets P are carried out, enabling the sheets P to be accumulated on the stacker 5a in order without being hindered by formerly loaded sheets.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a print post-processing method for post-processing output from an image forming apparatus such as a copying machine, a printing machine, or a beam printer. In particular, the present invention relates to a sheet post-processing device that includes a folding unit that folds sheets into a predetermined shape and a stacker unit that accumulates sheets.

(b) Conventional technology Conventionally, a sheet post-processing device equipped with a folding section and a stacker section is connected to an image forming apparatus such as a copying machine, and the unloading sheet 1- from the image forming apparatus is moved to a prayer section as desired. The sheets are bent into a predetermined shape and stacked in a stacker section. In this type of sheet post-processing device, when stacking sheets 1 to 1 on the stacker section, sheets 1 to 1 are folded in the stacker without distinguishing between sheets 1 to be folded by the folding device and sheets not to be folded. The receiving position of these sheets is constant.

←→ Problem to be solved by the invention By the way, if the stacker's sea 1~accepting position is
When stacking a large amount of folded sheets 1- on the stacker, for example, the condition shown in FIG.
As shown in el, when stacking sheets to be Z-folded, the Z-folded portion p/, of sheet 1-P' becomes significantly thicker as sheet 1 is loaded, and the next folded sheet P'' is the same as the previous sheet. There is an inconvenience that the folded sheet gets into the fold of P'.Furthermore, when stacking two-folded sheets, the folded sheet does not get into the fold of the previous sheet, but the folded part gradually becomes thicker and the next sheet ) will collide with the seat in front, causing a malfunction or jam.

Means for Solving the Problem The present invention (J1 aims at solving the above problems,
A stacker movement mode that changes the movement E-mode of the stacker based on each mode selected by the mode selection means.
The apparatus is characterized in that it is provided with a mode setting means and a driving means for driving the stacker in a predetermined movement mode based on a signal from the stacker movement mode setting means.

(e) Operation Based on the above-described configuration, when sheets from the image forming apparatus are sequentially delivered and stacked on the stacker, when a predetermined mode of the folding device is selected, the stacker A predetermined movement mode is set. Then, the stacker (Jl, moved according to the movement mode) is placed, for example, at a fixed initial position. According to 1., if the machine is to be folded into a certain shape or delivered to the public without being bent; Then, the sheets 1 and 1 are loaded first and are sequentially carried out and stacked on the stacker without being obstructed by the sheets 1 and 1.

(F) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the sheet post-processing unit l-U consists of a folding device] and a finisher device 7. Sheet entrance 9 of device 7
are connected so that they match. Furthermore, the sea 1~
The post-processing unit U attaches sheet 1 of the folding book M1 to the copying machine 10.
~Connect the inlet 2 to the sheet outlet 1) of the copying machine 10, and fold the recording sheet (hereinafter referred to as sheet) P carried out from the copying machine 10 into a predetermined shape using the folding device 1. It can be folded and further sent to the stacker section 5 or stipple section 6 of the finisher device 7 for accumulation, or to be stabilized and processed.

As shown in detail in FIG. 3, in the folding device 1, a pair of carry-in rollers 13 are arranged facing the sheet carry-in port 2 provided at the top of the main body 12 of the folding device, and further downstream of the pair of carry-in rollers 13. An entry lobe lifter 15 is disposed on the side so as to be switchable in two directions, and guides and conveys the sheet P fed from the sheet inlet 2 to the passing conveyance g816 or to the sheet folding conveyance path 17; : A pair of extractor rollers 19 are disposed at the downstream end of the general feed path 16, and a sheet discharger 1) 3 is provided downstream of the pair of discharge rollers 19. The third opening is specified to be level with the sheet carrying-in port 2, and to be located at -1.

See you again! - On the downstream side of the folding conveyance path J7, each member constituting the collapsing means A is arranged, and the first folding roller 20 is disposed. -La 20
A second folding roller 21 is disposed adjacent to the folding roller 21 .

Furthermore, a first deflector 22 is disposed downstream of the first analyzing roller 20 so as to be switchable in two directions.
S+ 7 to 1lri! The incoming sheet 1-P is transferred to the first folding bus 23 by the folding roller 20 of IJJl.
and the second fold ++-f'y 2 If the joint part has a lug) 3;;t, and on the downstream side of the first folding path 23 there is a first fixed collar 24 and a solenoid. Device 2
A movable stopper 25 is arranged to project into the first folding path 23 at 5a. Also, the first
A second deflector 26 is disposed on the downstream side of the folding roller 20 and the second folding roller 21 so as to be switchable in two directions. The folding roller 21 is guided and conveyed to the joint between the roller 21 and the third folding roller 29 adjacent to the roller 2. And the second
A second fixed stopper 30 is provided on the downstream side of the folding path 27 . In addition, the second and third folding rollers 21
．． ．． A third deflector 31 is disposed on the downstream side of the folding roller 29 so as to be switchable in two directions, and directs the sheet 1-P to the third folding path 32 or between the third folding roller 29 and the third folding roller 29 adjacent to the folding roller 29. 4. Fold h - guide to the joint with la 33.
transport. A third fixed stopper 35 is disposed downstream of the third folding path 32. Further, a folding end conveyance path 36 is formed downstream of the third and fourth folding rollers 29 and 33, and the downstream side of the conveyance #36 merges with the passing conveyance path 16 and communicates with the sheet discharge port 3. 3°, and the folding device 1 has a mode selection means Y such as a switch.
, 1. - When selected, it operates in one of the five modes shown below. .

The first through-pass mode is a mode in which the folding operation passes through the folding device 1, and in this mode, as shown in FIG.
J: II input "T-roller pair 13 and inlet deflector 15 lead to the passing conveyance path 16, and the discharge roller pair 19 passes through the output outlet 3 to the finisher device M7.

The second mode is carried out when a half-sized sheet I of A4 or 35 mm or less is carried into the sheet I, which is guided by the pair of conveying rollers 13 to the input rod differential l/ctor 15. -1) is now guided to the sea IJ conveyance path 17, and the first and second differentials 1 nokta 22° 26 oJ:
and the third differential lever 31, between the first and second folding rollers 20.21, between the second and third folding rollers 21, 29, and between the third and fourth folding rollers 29. ．．
33, the sheet passes through the fold=7-end conveyance path 36, and is sent out from the sheet ejection port 3 by a pair of ejection rollers 19.

The third two-folding mode is a mode in which a sheet of A3 or 84 or larger is folded in two, and the sheet P guided from the pair of carry-in rollers 13 to the sheet folding conveyance path 17 by the entrance deflector 15 is operated by the first deflector 22. is introduced into the first folding path 23. Thus, as shown in FIG. 4 (al), when the leading end of the sheet P contacts the first fixed stopper 24, a loop X is formed at the center of the sheet.

Then, as shown in FIG. 4 (bl), the loop X is held in the nip between the first folding roller 20 and the second folding roller 21, and a fold P1 is formed in the center of the sheet S. It becomes a sheet 1- folded in two (see Fig. 5 [, 1]).

Thus, the second sheet after this folded sheet P
deflector 26 and third deflector 31 between the second folding roller 21 and third folding roller 29, and from there between the third folding roller 29 and fourth folding roller 33. The sheet passes through the folding end conveyance path 36, and is sent out by a pair of discharge rollers 9.

The fourth Z-folding mode is a mode in which the sheet P is first folded in half and then one half is folded again to the opposite side. By operating the first deflector 22, the sheet is first introduced into the first folding path 23. When the leading end of the sheet P comes into contact with the movable spring 1-flange 25 projected by the solenoid device 25a, the sheet P
A loop is formed approximately 1/4 from the tip of the sheet 1. When the loop is caught in the nip between the first folding roller 20 and the second folding roller 21, the sheet 1. A first crease P2 is formed on P (fifth
(see figure fbl).

Then, the sheet P folded in this manner is introduced into the second path 27 by operating the second deflector 26. When the first fold P2 of the sheet P folded in half hits the second fixed stopper 30, the distance from the first fold P2 of the double folded sheet P is about 1/1/2.
A loop is formed near the second half of 4 in the same manner as described above, and the loop B is held in the nip between the second folding roller 21 and the third folding roller 29, forming the second fold P.
3 is formed. (See Figure 5 fb)). The Z-fold sheet that has been folded back to the front side in this way is further folded into the third
By operating the deflector 31, the third folding roller pair 29
and the fourth folding roller 33 , and then sent out to the finisher device 7 by the discharge roller 19 via the folding completion conveyance path 36 .

In the case of the fifth back Z-folding mode, in the same manner as described above, the sheet P guided from the carry-in roller pair 13 to the sheet folding conveyance l@17 by the operation of the entrance deflector 15 is transferred to the first deflector 22. By operation, it passes between the first and second folding rollers 20 , 21 and from there is introduced into a second folding path 27 by operation of the second deflector 26 . However, when the tips of the sheets 1-P come into contact with the second fixed stopper 30, the loop formed at about 1/4 from the tip of the sheets 1-P connects with the second folding roller 21. 3, and the first fold P4 is formed as shown in FIG. 5(c).

In addition, after , it is introduced into the third folding path 32 by operating the third differential L/lid 31, and the fold P4 of sea+-p is
comes into contact with the third fixed stopper 35, and a loop J-+ is formed in the vicinity of the overlapping part of about 1/4 from the fold P4 of the seal l-P. In the nip with Low U33 (waekomare, Figure 5)
A second fold P5 shown in C) is formed.

Thus, it is folded back to the back side.
When the folding end is -r1#, the feed path 36 is red+, I:+L, and the first roller is sent out from the pair of ejection rollers 19.

In FIG. 3, 10SS, jJ population sensor, and S7 are folding detection sensors that measure the length of the folded sheet P.

Further, as shown in the figure, the finisher device 7 has a motor M mounted above the rear part of the main body 39 thereof.

A stacker 5a of the stacker section 5 is disposed, which can reciprocate vertically and horizontally by means of sliding means, and further below the stacker section 5 is an intermediate 1/I/I 6a of the stable section 6.
A stopper 40 for supporting one end of the sheet P on the tray 6a is rotatably disposed at the lower end of the intermediate tray 6a. Further, a lower tray 41 is arranged below the stapling section 6, and the stopper 4
0 rotation, the sheet P on the intermediate tray 6a is dropped and stored in the lower tray 41. Further, a sheet inlet 9 is provided at the upper front of the finisher main body 39, and the sheet inlet 9 is disposed at the same height as the sheet outlet 1) of the copying machine 10. ing. and,
A pair of carry-in rollers 42 is arranged at the sheet carry-in entrance 9, and an inlet deflector 43 is further disposed downstream of the pair of carry-in rollers 42.
is disposed so as to be switchable in two directions, and conveys the sheet 1-P sent from the sheet inlet 9 to the stacker section conveyance path 45 or to the stipple section conveyance path 46. Further, a pair of stacker discharge rollers 47 is arranged at the downstream end of the stacker conveyance path 45, and discharges the conveyed sheet=12P to the stacker 5C. In addition, a pair of stapling part discharge rollers 49 is provided in the 4ζζ flow section of the stapling part conveyance path 46.
furthermore, the lower roller 49 of the discharge roller pair 49
A part of the belt 50, the lower end of which is in contact with the intermediate 1-Reiro a, is wound around n, and the belt 50 rotates together with the lower roller 49a, and the belt 50 rotates together with the lower roller 49a of the stay gol section 1-1 output roller pair 49. 6. Stretch the sheet P which has been put out one by one into the intermediate 1 L-i 6a-1 by the rotation of , and align the edges along the buckwheat 40 6. Furthermore, a stay 51 is installed at the lower end of the intermediate 1-Leiro a, and the intermediate 1-L-,
A6 Stable the sea 1-P on the o.

Then, when the stable mode is selected, the sheet is loaded from the sheet loading port 9! - Sea 1 brought in by Mi> vs. 42
- P is guided to the stable section conveyance path 46 by the operation of the deflation roller 43, and is guided to the stable section conveyance path 46,
A part of ill' is placed on the intermediate 1-1/A 6a. Then, the sea j [) is once belt 5
It is vertically aligned by J to 0. Also, lateral alignment is performed by a stepping motor.

The ends of the sheets I and P thus aligned on the intermediate tray 6a are stippled by the stapler 51. Then, the stippled shea bundle is dropped and stored on the lower tray 41 by rotation of the stopper 4o.

The finisher unit M7 is provided with various sensors, S is a finisher population sensor provided at the sheet carry-in port 9, and S2 is a sensor for sheets to be carried out to the stacker section 5.
S3 is an intermediate tray exit sensor, and S4 is an intermediate tray 1 detection sensor that detects the sheet carried out to the intermediate tray 6a.

On the other hand, in the stacker section 5, as shown in detail in FIG. 2, a lever l is rotatably supported on a fulcrum 61 facing the stacker 5a. Alternatively, when the sheet is pushed down onto the sheet on the stacker 5a, the rear end is detected by the level detection sensor S5, and as a result, the stacker 5a is detected. Further, the stacker 5a moves downward or stops in a predetermined movement mode under the regulation of the stacker movement mode setting means ¥2. That is, the slider movement mode setting means Y2 sends a signal to the morph M that drives the stacker 5n based on each mode of the folding device 1, and sets the initial position where the stacker 5a receives the sheet and the M of the sheet. First, set the place where the image will be placed.

Then, when the stacker mode is selected in the newisher device 71, the sheet 1-
If a mode in which the bending process is not performed, for example, the first through-pass mode or the second mode mentioned above, is selected,
The stacker 5a is the highest level detected by the level detection sensor S5.
Move the lever l up to the dotted line position 1i until it reaches the third position.
Thereafter, it descends slightly and stops at position 1 (solid line position of lever 1), which is the initial position where it is no longer detected by level detection sensor S5. Then, the sheet P is carried in from the sheet carry-in port 9 by a pair of carry-in rollers 42, and
When the sheets are guided to the stacker conveyance path 45 by the operation and are sequentially discharged and stacked on the stacker 5a, the height of the sheet 1-P increases and the lever 1 rotates accordingly, which is detected by the 1-novel detection sensor S6. , the stacker 5a descends slightly, stops at a position away from the level detection sensor S5, and stacks the next ejected sheet one after another, thus stacking a large amount of sheets 1-P (see Figure 2 (bl)). ).Also,
The mode of folding the sheet, for example, the third to fifth modes mentioned above.
If the folding mode is selected, the stacker 5a
#1 above) rises to the highest level detected by the ζ level detection sensor S5, and then, as shown in FIG. 2 (C1),
It descends to a predetermined position (initial position) that is considerably lower than the initial position in the mode in which the sheet is not folded, and then stops. It is desirable that this lowering amount j be set to different optimal amounts depending on the two-fold mode and the Z-fold mode.

Then, the folded sheets (folding sheets 1.) P are sequentially discharged and stacked on the stacker 5a (see FIG. 2 Fdl), and the height of the folding sheets 1 to P increases until the lever -] fi
-- When the stacker 5a rotates accordingly and is detected by the level detection sensor S5, the stacker 5a lowers a predetermined plate corresponding to each folding mode and stops 'C. Then, the next discharged folded sheet 1-P is stacked one after another, and so on, and the folded sheets 1-P are stacked without being obstructed by the folded sheets 1-P loaded earlier. In addition, the amount of descent according to each of the above-mentioned folding modes is, for example, in the case of Z-folding, the amount of descent is 3 man every 5 sheets, and in the case of 2-fold prayer, the amount of descent is 2 orders of magnitude for every 5 sheets. is defined by the number of sheets.

Further, according to the present invention, a switch that can vary the amount of descent according to the thickness of the sheet may be provided. (A slide/picker movement mode setting means for changing the movement mode of the stacker based on this, and a driving means for driving the stacker in a predetermined movement mode based on a signal from the stacker movement mode setting means. Then, the stacker operates at a predetermined fJ [
Since the sheets are moved in I mode, the output sheets are stacked one after another on the stacker without being obstructed by the sheets that were stacked earlier, and sheets that have been folded can also be stacked on the same stacker in the same way as sheets that are not folded. It becomes possible to accumulate large quantities, and is particularly effective for sheet post-processing devices connected to large-scale, high-speed copying machines.

[Brief explanation of the drawing]

FIG. 1 shows a sea 1 connected to a copying machine according to an embodiment of the present invention.
〜Schematic side view of the post-processing unit, FIG. 2 is a side view showing the stacker section of the finisher device, fat indicates the configuration of the stacker section of the embodiment of the present invention, and (bl indicates the stacking of sheets that are not to be folded). fe) shows the operation of the stacker when stacking the folded sheets, fdl shows the state in which folded sheets are stacked on the stacker, and (e) shows the operation of the stacker when the present invention is not applied. This shows when folded sheets are loaded on the stacker. Third
The figure is a side view of the folding device according to the present invention, and FIG. 4 is a side view showing the folding operation of the sheet 1 in the two-fold mode. (b) shows the state in which Sea I is folded in half at the center. Figure 5 is a diagram explaining the sheet folding remote, which shows (al l-,,t two-fold mode, (bl
indicates the Z-folding mode, ((2) indicates the back Z-analysis remote. FIG. 6 is a side view of the finisher device of the present invention. 5n-stacker, Ml driving means (motor), Y,
Mode selection means, Y2 - Stacker movement mode setting means, U Sheet post-processing device (sheet post-processing unit 1-).

Claims (3)

[Claims] (1) A folding means for folding a sheet in a predetermined folding mode, a mode selection means for appropriately selecting each folding mode of the folding means and a path mode for passing through the folding means, and a sheet carried out through the folding means. A sheet post-processing device comprising a stacker that can be moved up and down on which the stacker is loaded, comprising: a stacker movement mode setting unit that changes the movement mode of the stacker based on each mode selected by the mode selection unit; and the stacker A sheet post-processing apparatus comprising: a drive means for driving the stacker in a predetermined movement mode based on a signal from a movement mode setting means. (2) The sheet post-processing apparatus according to claim 1, wherein the stacker movement mode setting means is means for setting the initial position of the stacker in the folding mode to be lower than the initial position in the pass mode. (3) Claim 1, wherein the stacker movement mode setting means is means for making the amount of descent of the stacker in the folding mode larger than the amount of descent of the stacker in the pass mode.
The sheet post-processing device described in Section 1.