JP3284782B2 - Paper post-processing device and its control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a copying machine, a printer,
The present invention relates to a sheet post-processing apparatus that performs post-processing such as binding or punching on a sheet after image formation in a facsimile or the like.

[0002]

2. Description of the Related Art Some copiers, printers, and fax machines have a paper post-processing function of automatically stapling or punching a plurality of sheets to be set and discharging the sheets outside the machine. . FIG. 11 is a conceptual diagram showing a schematic structure of a conventional copier with a paper post-processing apparatus, where 70 is a main body of the copier, 71 is an automatic document feeder, 72
Denotes a sheet post-processing device, 73 denotes a sheet cassette, 74 denotes a discharged sheet, and 61 denotes a stacking tray of the sheet post-processing device 72.

In FIG. 1, a copying machine main body 70 copies an image of a document fed from an automatic document feeder 71 onto a sheet fed from a sheet cassette 73, and passes it to a sheet post-processing device 72. Stapling or punching is automatically performed, and set and discharged to the stacking tray 61. In the sheet post-processing, whether or not the post-processing is performed on the sheet from the copying machine main body 70 can be selected by selecting a post-processing mode.

In the above-described conventional paper post-processing apparatus 72, when the post-processing mode is selected, a mode in which the post-processing is performed on the transport route A and the sheet is discharged to the stacking tray 61, and the mode in which the post-processing is not performed is selected. In this case, the sheet is directly discharged from the copying machine main body 70 to the stacking tray 61. It should be noted that Japanese Patent Application Laid-Open No. 2-14 / 1990 discloses this kind of prior art.
No. 44370, JP-B-4-19151, and JP-A-3-106754.

[0005]

In the above-mentioned prior art, in the mode in which post-processing is not performed, the sheets from the copying machine body are directly discharged one by one to the stacking tray. There was a problem that the so-called paper alignment deteriorated. Further, the post-processing apparatus disclosed in Japanese Patent Application Laid-Open No. 3-106754 has a large machine size because the editing tray is installed facing downward, and a stopper for regulating the paper is required at the leading end. There was a problem.

A first object of the present invention is to allow a plurality of sheets to be discharged to a stacking tray in a aligned state, that is, a state in which sheets are aligned, even when a mode in which post-processing is not performed is selected, and to copy only one sheet. However, an object of the present invention is to provide a high-speed and compact sheet post-processing apparatus that can discharge a sheet while aligning the position of the sheet. A second object of the present invention is to provide a control method of the above-mentioned sheet post-processing apparatus.

[0007]

In order to achieve the above object, a first aspect of the present invention is directed to a sheet for performing post-processing such as binding or punching on a sheet discharged from an image forming unit. A post-processing device, wherein one editing tray having at least a sheet shift paddle and a sheet aligning plate for aligning sheets discharged from the image forming unit, and a sheet post-processing provided at a rear end of the editing tray Machine, a stacking tray for stacking sheets discharged from the editing tray, and a sheet aligned (set) in the editing tray.
A set discharge roller that discharges to the loading tray ,
One end of the paper on the editing tray touches the stacking tray
The paper discharged from the image forming unit is set and discharged to the stacking tray via the editing tray regardless of whether or not post-processing is performed by the paper post-processing machine. Also, in the first invention,
At the regular position away from the editing tray and the editing tray
Close and move between the position facing the set discharge roller and
Movable so as to be paired with the set discharge roller.
And the edit tray together with the discharge roller
The stacking is performed while pressing the aligned paper in (a).
A paper presser (3) configured to discharge to a tray
0) can be provided.

According to a second aspect of the present invention, there is provided a sheet post-processing apparatus according to the first aspect.
, A first controller that controls an image forming unit based on set image forming parameters, a second controller that controls the sheet post-processing apparatus according to parameters set in the first controller, and the post-processing machine of
And a post-processing control means for controlling the operation, the sheet pulling paddle
Paddle control means for controlling the operation of
Alignment plate control means for controlling the operation, and movement of the discharge roller
And a set discharge control means for controlling the work, post-processing Yu
Irrespective of the paddle control means and the matching plate control
After aligning the paper on the editing tray by means,
The paper on the editing tray is removed by the set discharge control means.
It is characterized by discharging .

[0009] In order to achieve the second object, the third invention according to claim 3, in the second invention, the exhaust
Out with a set discharge speed change means 85a for changing the discharge speed of the rollers, and changing the multivalued discharge speed of the discharge rollers in the sheet discharge <br/>. In each of the above inventions, the set and discharged sheets are processed in the same manner when one sheet is set.

The set discharge speed in the third invention can be set to an optimum mode according to the number of sheets in one set.

[0011]

In the configuration of the first aspect of the present invention, the paper-adjusting paddle provided on the one editing tray aligns the entering direction of the paper discharged from the image forming section, and the paper aligning plate is provided on the side thereof. Align posture. The sheet post-processing machine performs stapling or punching on sheets aligned on an editing tray.

A discharge roller sets and discharges the sheets to the stacking tray via the editing tray regardless of whether or not post-processing is performed by the sheet post-processing machine, and stacks the sheets. The editing tray
Make sure that one end of the paper on
Since it is configured, the shape and size of the editing tray
And the paper post-processing equipment itself is compact.
Configuration. Further, the structure of the first invention is described.
In the case where the paper holding device (30) is provided
Means that the paper holding device (30) is separated from the editing tray.
Ejects the set at a normal position and closes to the editing tray
It moves between the roller and a position facing the roller. The set discharge
At the position opposite to the exit roller, adjust it with the editing tray.
The set (set) sheet is then discharged by the discharge roller and the sheet press.
Ejected to the loading tray
Is done. The paper is fed by the discharge roller and paper holding device.
The paper is ejected while being pressed, so the paper alignment after ejection
Not disturbed. Further, in the configuration of the second aspect, the first controller controls the image forming unit based on the image forming parameters set in the first controller.

The second controller controls the sheet post-processing device according to the parameters set in the first controller, and the post-processing control means controls the operation of the post-processing device.
You. Further, the paddle control means controls the operation of the paper shift paddle.
The alignment plate control means controls the operation of the sheet alignment plate.
The set discharging means controls the operation of the discharging roller. And the paddle control means regardless of the presence or absence of post-processing,
The alignment plate control means aligns the paper on the editing tray.
And the set discharge control means controls a sheet on the editing tray.
Is discharged.

Further, in the configuration of the third aspect,
The set discharge speed changing means sets the discharge speed of the discharge roller to multiple
Change to a value. The discharging speed changing means may be a two-speed mode or a combination mode of a plurality of speeds, or may be a one-speed mode set in the first controller.
It is possible to set the optimal mode according to the number of sets
it can. The set and discharged sheets are processed in the same manner when one sheet is set.

Further, the set discharge speed of the set discharge speed changing means is set as a combination of a plurality of values during the set discharge, and is effective not only in the post-processing no mode but also in the post-processing mode, and the number of sheets of one set is set. When there are many
It is particularly effective in preventing the scatter.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a main configuration diagram illustrating the configuration of an embodiment of a sheet post-processing apparatus according to the present invention.
Is a paper transport path, 12 is a paper discharge roller, 13 is an editing tray, 14 is a paper shift paddle, 15 is a paper alignment plate, 16 is a paper alignment positioning motor, 17 is an exit sensor,
21 is a binding machine as a paper post-processing machine, 30 is a paper presser, 32 is a pinch roll, 33 is a leaf spring, 34 is a shaft, 38 is a spring, 51 is a set discharge roller, 61
Denotes a stacking tray, and 72 denotes a sheet post-processing device.

In FIG. 1, the image forming section is omitted, and the sheet on which the image is formed is discharged from the direction of arrow C. As shown by the arrow C, the sheet sent from the image forming unit passes through a sheet transport path 11 and passes through a sheet discharge roller 12
Is ejected to the editing tray 13 by the
The paper alignment positioning motor 16
The paper alignment of the side is performed at 15 by the paper alignment plate driven by and the alignment is performed.

On the upper part of the editing tray 13 is a paper presser 3
0 is provided, and is always at the ascending position, and is configured to descend after a predetermined number of sheets have been placed on the editing tray 13. The paper pressing device 30 has a pinch roll 32 to which a leaf spring 33 pivotally supported by a shaft 34 is attached. The pinch roll 32 presses against the editing tray 13 against a spring 38 in response to a descending command, The sheet is discharged to the stacking tray 61 together with the set discharge roller.

A binding machine 21 as a paper post-processing machine is provided at the rear end of the editing tray 13, and performs a binding process on a predetermined number of aligned paper sheets in a binding mode. The exit sensor 17 detects the ejection of the sheet from the image forming unit, and based on the detection output, performs the sheet holding device 30, the above-described alignment operation, the operation of the binding machine 21, and the set ejection operation to the stacking tray 61, and the like. Controlled.

FIG. 2 shows a set ejection device (a paper press device and a paper ejection device).
And FIG. 3 is a side view of a main part illustrating a configuration of the set discharging device, and FIG. 4 is a side view illustrating a configuration of the set discharging device during set discharging. It is a main part configuration diagram, 31 is a bearing, 3
3 is a pinch low nip leaf spring, 34 is a shaft, 35
Is a pressing guide, 35a is a concave portion with which the stopper 39 slides,
36 is a pinch nip motor, 37 is a cam roller, 39 is a stopper, 40 is a spring support pin, 42 is a frame, 43 is an encoder, 44 is an up sensor, 45 is a down sensor, 51 is a set discharge roller, 52 is a driven pulley, 53 Is a drive pulley, 54 is a belt, 55 is a discharge motor, and 62 is a set sheet.

[0021] In the set pre-discharge in the state shown in FIG. 2, the paper pressing
The device 30 is released from being pressed against the editing tray 13 and is at the raised position. The sheet discharged from the image forming unit is the same as that shown in FIG.
As described above, the sheet enters the editing tray 13 and is aligned by the sheet shifting paddle 14 and the sheet aligning plate 15 to be 6 in FIG.
As shown at 2, it is held on the editing tray 13.

In the case of the binding mode, the binding machine 21 shown in FIG. 1 operates to bind the set paper 62. Thereafter, the pinch nip motor 36 shown in FIG.
Slides on the concave portion 35a and descends to the position shown in FIG.
At this time, a rotation signal is output from the slit of the encoder 43, and the down sensor 45 is turned on and stops.

At this time, the cam roller 37 presses the pressing guide 35, and the pinch roller nip leaf spring 33, which is coaxial, applies a pinch pressure so that the sheet set on the pinch roll 32 is not displaced and is nipped. Set paper 6
2 is in contact with the paper tray 61. next,
When the ejection motor 55 is driven, the drive pulley 53,
As the set discharge roller 51 rotates through the belt 54 and the driven pulley 52, the set paper is discharged and stacked on the stack tray 61.

Thereafter, the pinch nip motor 36 rotates again for the next processing, and the pinch roller 32 starts to rise, and when the predetermined rotation by the slit of the encoder 43 is completed, the up sensor 44 is turned on and stopped. Thus, the pinch roller 32 is lifted by the spring 38 via the pinch roller nip leaf spring 33 and waits for the next processing.

As described above, even in the mode without post-processing, the sheets are aligned and then discharged, so that a beautifully aligned set can be obtained on the stacking tray 61. Also, if the discharge speed is high, the paper may be scattered. If it is too late, the timing will not be in time. Therefore, by controlling the paper discharging speed during the discharging operation, the dispersion at the time of discharging is eliminated, and the timing is adjusted.

FIG. 5 is a block diagram of a control system for executing the operation of the above embodiment.
72 is a binding machine as a post-processing device; 80 is a first controller; 81 is a second controller; 82 is post-processing control means; 83 is a paddle control means;
5 is a set discharge control means, 85a is a set discharge speed setting means, and 86 is a paper pressing control means.

In FIG. 1, a first controller 80 controls an image forming unit 70 based on set image forming parameters.
Control. The second controller 81 controls the sheet post-processing device 72 according to the parameters set in the first controller 80. The post-processing device 72 includes a post-processing control unit 82, a paddle control unit 83, and a matching plate control unit 8.
4, set discharge control means 85, and paper press control means 8
6 is provided.

When the post-processing mode is instructed from the first controller 80, the binding machine 21 is operated to bind the set sheets in addition to the operations described with reference to FIGS. . Also, when the first controller 80 issues an instruction for no post-processing mode, the paddle control means 83 and the matching plate control means 84 are operated in the same manner as in the post-processing mode, and then the set discharge control means is operated. 85
To work.

Then, the set discharge speed setting means 85a
Can control the set discharge control means 85 to be driven in combination of a plurality of speeds, and can set the discharge speed to an optimum mode according to the number of sheets constituting one set set in the first controller. is there. FIG. 6 is a flowchart for explaining the schematic operation of the embodiment of the present invention.

In the figure, first, the paper discharged from the image forming section is discharged onto an editing tray (S-1).
It is determined whether the number of sheets set in the first controller 80 is one or two or more (S-2). If the number is one, the sheet is discharged onto the stacking tray as it is and the job ends. It is determined whether or not this is the case (S-8).
If not, the process returns to S-1.

If it is determined in S-2 that the number of sheets is two or more, the above-described sheet alignment is executed (S-
3) If the mode is the post-processing mode, the binding machine is operated to perform the binding process (S-5), and then the set is discharged. After the sheets are set and discharged onto the stacking tray, it is determined whether or not the job has been completed (S-8). If not, the process returns to S-1.

FIG. 7 is a timing chart for explaining the operation of one embodiment of the present invention. In the figure, the sheet is detected as passing through the jet sensor (see FIG. 1),
When the paper is discharged to the editing tray, the leading edge is aligned by a paddle and the typing is performed by an alignment plate. At this time, the pinch roller is at the raised position. After set paper is passed through N sheets lapse of a predetermined T ₀ hours, holding the paper pinch roller is set lowered pinch nip motor is rotated, binding a post-processing is performed.

After the binding process, the eject motor (set discharge motor) is rotated to discharge the set sheet onto the stacking tray. In the post-process free mode, pressing the after a predetermined T ₀ hour paper is set through N sheets, the pinch roller pinch nip motor is rotated is set in descending paper, the time required for the post-treatment At (T ₁ + T ₂ ), set ejection is performed with the speed of the eject motor (set ejection motor) being variable.

Here, the discharge is performed by changing the rotation of the eject motor (set discharge motor) from high speed to low speed.
This set discharge motor is constituted by a DC motor, a stepping motor, or the like. FIG. 8 shows D as a set discharge motor.
FIG. 8 is an explanatory diagram of an example of a drive voltage by a set discharge speed changing unit when a C motor is used, and shows a drive voltage waveform of the set discharge motor in the non-post-processing mode described with reference to FIG. 7.

The post-processing time of post-processing organic mode of FIG. 7 T
In a the set discharge time is the addition of Tb Ta + Tb period, a period of post-processing time Ta as shown in FIG. 8 is gradually raised to V ₁ the driving voltage from 0V, the set discharge time
Period of Tb is set discharged as a constant voltage V _1. What
8 and 9, the start time of the post-processing time Ta is set to 0.
The time after the elapse of the post-processing time Ta is defined as T ₁ ,
Time after elapse of post-processing time Ta and set discharge time Tb
If the set to T _2, expressed by _{T 2 = T 1 + Tb =} Ta + Tb
You. FIG. 9 is an explanatory diagram of an example of driving by the set discharge speed conversion means when a stepping motor is used as the set discharge motor. The drive panel rate to be supplied is shown.

The post-processing time of post-processing organic mode of FIG. 7 T
In a the set discharge time is the addition of Tb Ta + Tb period, from 0 to driving pulses by the elapsed time 0 to T _1, as shown in FIG. 9 gradually increased to X _0, elapsed time T ₁ through T constant at ₂ set discharged as driving pulse rate of X _0.
FIG. 10 is an explanatory diagram of a driving example by the set discharge speed changing means in the case of the two-speed discharge mode using the stepping motor as the set discharge motor, and without post-processing described in FIG. 9 shows a drive pulse rate supplied to a set discharge motor in a mode.

In the Ta + Tb period shown in FIG.
The post-processing time Ta has elapsed as shown in FIG.
It is was up to the time T ₁ is gradually increased from 0 to X _1, at the time elapsed
Constant driving from among T ₁ to T ₃ pulse rate X ₁ age,
From the elapsed time T ₃ to T ₂ gradually reduced to X _2, elapsed
To discharge by driving at a constant X ₂ from time T ₂ to _{T 4 (= Ta + Tb)} . According to the drive control modes of the respective motors, the sheets are set and discharged onto the stacking tray without any scatter.

As described above, even in the single sheet mode, the sheet is first discharged to the collecting tray and then discharged to the stacking tray. In the post-processing mode for two or more sheets, the sheets discharged to the collecting tray are aligned. After that, post-processing such as binding is performed, the sheets are ejected as a set, and stacked on a stacking tray. Even in the non-post-processing mode, the sheet is once discharged to the editing tray, discharged after being set in the paper alignment, and stacked on the stacking tray.

Thus, regardless of the presence or absence of post-processing,
A sheet in a correct posture and aligned set is discharged onto the stacking tray, which facilitates subsequent handling by the operator.

[0040]

As described above, according to the present invention,
Even when the mode in which post-processing is not performed is selected, a plurality of sheets can be discharged to the stacking tray in a state where the sheets are aligned, that is, the sheets are aligned, and even if only one sheet is copied, the sheets are aligned and discharged. It is possible to provide a high-speed and compact sheet post-processing apparatus that can perform the processing.

[Brief description of the drawings]

FIG. 1 is a main part configuration diagram illustrating a configuration of an embodiment of a sheet post-processing apparatus according to the present invention.

FIG. 2 is a main part configuration diagram illustrating a configuration of a set discharge device of a sheet post-processing apparatus according to an embodiment of the present invention before set discharge.

FIG. 3 is a main part side view for explaining a configuration of a set discharge device of one embodiment of the sheet post-processing apparatus according to the present invention.

FIG. 4 is a main part configuration diagram at the time of set discharge for explaining the structure of a set discharge device of one embodiment of the sheet post-processing apparatus according to the present invention.

FIG. 5 is a block diagram of a control system for executing the operation of one embodiment of the sheet post-processing apparatus according to the present invention.

FIG. 6 is a flowchart illustrating a schematic operation of an embodiment of the sheet post-processing apparatus according to the present invention.

FIG. 7 is a timing chart for explaining the operation of one embodiment of the sheet post-processing apparatus according to the present invention.

FIG. 8 is an explanatory diagram of an example of a driving voltage by a set discharge speed changing unit when a DC motor is used as the set discharge motor.

FIG. 9 is an explanatory diagram of a driving example by a set discharge speed changing unit when a stepping motor is used as the set discharge motor.

FIG. 10 is an explanatory diagram of a driving example by a set discharge speed changing unit in a two-speed discharge mode using a stepping motor as the set discharge motor.

FIG. 11 is a conceptual diagram showing a schematic structure of a conventional copier with a sheet post-processing device.

[Explanation of symbols]

11: paper transport path, 12: paper discharge roller, 13: edit tray, 14: paper shift paddle, 15: paper alignment plate, 16: paper Alignment positioning motor, 17 ... Exit sensor, 2
1. Binding machine as a paper post-processing machine, 30.
Paper press device, 32 ... Pinch roll, 33 ...
··· Leaf spring, ····· Shaft, ··········································· Set discharge roller, ······························

Claims (3)

(57) [Claims] 1. A sheet post-processing apparatus for performing post-processing such as binding or punching on a sheet discharged from an image forming unit, comprising: a sheet shifting paddle and a sheet for aligning the sheet discharged from the image forming unit. One with at least a matching plate
The editing tray, a sheet post-processing machine installed at the rear end of the editing tray, a stacking tray for stacking sheets discharged from the editing tray, and the editing tray.
A set for discharging (set) paper to the stacking tray
A discharge roller, and one end of the paper on the editing tray contacts the stacking tray.
Is configured so that, and, paper, characterized in that the set discharging the stacking tray through the editing tray regardless sheets discharged to the presence or absence of post-treatment with the sheet post-processing device from the image forming section Post-processing device. 2. A paper post-processing apparatus according to claim 1, wherein
A first controller that controls the image forming unit based on the set image forming parameters; a second controller that controls the sheet post-processing device according to the parameters set in the first controller; Post-processing control means for controlling the operation of the paper-feeding machine , and controlling the operation of the paper-adjusting paddle.
A paddle controlling means for control, controlling the operation of the sheet aligning plate
And aligning plate control means for, to control the operation of the discharge roller
And a set discharge control unit that, the paddle control means and the or without aftertreatment
The paper on the editing tray is aligned by the alignment plate control means.
After that, the editing tray is controlled by the set discharge control means.
A sheet post-processing device for discharging the upper sheet . 3. A sheet post-processing apparatus according to claim 2, further comprising a set discharge speed changing means for changing a discharge speed of said discharge roller , wherein the discharge speed of said discharge roller is controlled by a paper discharge speed.
A sheet post-processing device for changing to a plurality of values during delivery.