JPH06227737A - Sheet after-treatment device - Google Patents

Abstract

PURPOSE:To expedite binding treatment by changing speed at which a chuck conveys copying sheets to a binding means according to the size and the number of the copy sheets discharged from an image forming device and distributionally placed on a bin and speed at which the chuck returns copying sheets after binding to the bin. CONSTITUTION:The number of copying sheets the size of which is previously recognized by a duplicator body is counted by means of an inlet sensor and discharged on a bin 13. In this way, the size of the copying sheet, a finally discharged copying sheet, and the number of the copying sheets are recognized. After truing of the discharged coping sheets on the bin 13 is executed by means of a jogger device 21, a sheet bundle is conveyed to a nipping binding means 23 by means of a chuck device 22. In this case, a motor is driven based on speed data preset according to the size and the number of the recognized sheet bundle and conveyance to a binding means 23 is effected. A binding-completed sheet bundle is also returned to the bin 13 at the same speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention distributes and aligns copy sheets discharged from an image forming apparatus in bins arranged in multiple stages and moving up and down, and performs post-processing such as binding on the copy sheets. The present invention relates to a post-processing apparatus, and more particularly to a paper post-processing apparatus characterized in that the moving speed of chucking means for sandwiching a copy sheet bundle and guiding it to the binding means is controlled.

[0002]

2. Description of the Related Art In a conventional sheet post-processing apparatus having a binding device, a chuck device which moves in a direction perpendicular to a sheet discharging direction is known as a means for guiding a stacked copy sheet bundle to the binding device. This conventional chuck device
The copy sheet bundle is guided to the binding device at a constant moving speed regardless of the size and the number of copy sheets stacked on each bin.

[0003]

As described above, in the chuck device in the conventional binding device, the copy sheet bundle is moved at a constant speed regardless of the size and number of the stacked copy sheet bundles. In the initial stage of setting the moving speed, copying is performed under the condition that the size of the sheets that can be bound, the largest size within the range of the number of sheets, and the speed at which the largest number of sheets can be moved, that is, the condition that the drive unit is most loaded. The speed is set so that the stack of sheets can be reliably moved.

Therefore, even when the size of the sheets to be stacked is small and the number of sheets to be stacked is small, the drive unit has a sufficient margin to move the copy sheet bundle,
It means that the vehicle is moving at the speed in the most severe condition. Therefore, there is a problem that the post-processing efficiency of paper is poor.

The present invention eliminates the drawbacks of the conventional device described above,
An object of the present invention is to provide a sheet post-processing device that can perform binding processing more promptly.

[0006]

The above-mentioned object is to distribute copy sheets discharged from an image forming apparatus to bins arranged in multiple stages and vertically moved, and to perform post-processing such as binding on the copy sheets. In the sheet post-processing apparatus for performing, the speed at which the bundle of copy sheets is guided to the binding means by sandwiching the bundle of copy sheets to the binding unit, depending on the size and the number of loaded copy sheets discharged from the image forming apparatus and distributed and stacked on each bin This is achieved by the first means provided with chuck means for changing the moving speed of the operation of sandwiching the completed copy sheet bundle and returning it to each bin.

The above-mentioned object can be achieved by the second means in which the moving speed of the chuck means is slowed down as the paper size increases and the number of stacked sheets increases in the first means.

[0008] Further, the above-mentioned object is the third means, wherein in the first means, the moving speed of each of the chuck means at each operation is set to a speed at which the bundle of copy sheets stacked on each bin is not disturbed when moving. Achieved by

[0009]

In the first and second means, a chuck means whose moving speed changes depending on the size and number of stacked copy sheets is adopted. When the size of the stacked copy paper sheets is small, or when the number of stacked sheets is small, the chuck means is moved at the fastest speed within the capability of the drive motor, so that the chuck device that moves at a constant speed is used. It is possible to move the sheet quickly, and as a result, it is possible to obtain a sheet post-processing apparatus having a short binding processing time and high productivity.

In the third means, the copy sheet bundle is moved at a speed that does not disturb the copy sheet bundle according to the size of the ejected copy sheets and the number of stacked sheets, so that the copy sheet bundle can be stably moved. Thus, it is possible to obtain a sheet post-processing device with good binding accuracy.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a sheet post-processing apparatus according to the embodiment, FIG. 2 is a perspective view centering on a bin of the sheet post-processing apparatus according to the embodiment, and FIG. 3 is a configuration diagram of a chuck device. As shown in FIG. 1, the copy paper discharged from the discharge unit 11 of the copying machine main body 1 enters the post-processing apparatus main body 2 side, and a branching claw 12 is used to perform post-processing such as gathering, sorting, and binding. Thirteen
It is branched into a first transport path 14 for transporting the copy paper and a second transport path 16 for transporting the copy paper to the collecting tray 15 not subjected to the above processing.

A rotary punch unit 17 is arranged in the middle of the first transport path 14, and the rotary punch unit 17 is driven a predetermined time after the entrance sensor SN1 detects the trailing edge of the copy sheet to drive the copy. It is controlled so that a punch hole is formed at a predetermined position on the trailing edge of the sheet.

The copy sheets, the size of which has been recognized in advance on the copying machine main body 1 side, are discharged onto each bin 13 after the number of discharged sheets is counted by the entrance sensor SN1, and are swung by the jogger device 21 one by one. And is pressed against a front side plate (not shown) to be aligned.

When the final discharged sheets are aligned by the jogger device 21, the chuck device 2 provided outside the front side plate.
The stack of copy sheets stacked on the bin 13 is sandwiched by the two.

The chuck device 22 will now be described. The chuck device 22 advances from the position indicated by the solid line in FIG. 3 to the position indicated by the alternate long and short dash line by the actuation of the front and rear solenoids 25 (direction of arrow B shown in FIGS. 2 and 3). The front-rear moving section 26 is provided with two pairs of upper and lower arms 28 and 29 with two fulcrum shafts 27a and 27b as fulcrums, and each upper arm 28 is connected by a connecting shaft 30.
With 0, the two upper arms 28 can be actuated simultaneously. The upper and lower arms 28, 29 are in contact with each other by the slide rollers 31a and 31b provided on the upper and lower arms 28, 29, respectively, and when the upper arm 28 moves downward (clockwise direction) about the fulcrum shaft 27a, The slide roller 31a of the upper arm 28 pushes down the slide roller 31b of the lower arm 29 so that the lower arm 29 moves upward (counterclockwise) about the fulcrum shaft 27b. That is, the upper and lower arms 2
Reference numerals 8 and 29 interlock with slide rollers 31a and 31b to perform an opening or closing operation. Further, each lower arm 29 is provided with a tension spring (not shown), and one end of this tension spring is attached to the lower arm 29,
The other end is attached to a protrusion provided on the front-rear moving unit 26. The lower arm 29 receives a rotational force in the clockwise direction by the pulling force of the tension spring, whereby the upper and lower arms 28, 29 are urged in the opening direction and are normally kept in the open state. When the upper arm 28 is operated in the clockwise direction by the operation of the arm solenoid 32, the lower arm 29 is rotated in the counterclockwise direction against the tension spring in conjunction therewith, and the upper and lower arms 28, 29 are closed. (State shown by a chain double-dashed line in FIG. 3). The sheet bundle has its end face sandwiched by the upper and lower arms 28 and 29 at two places.

By driving the drive motor 24, a timing belt (not shown) is driven, and the chuck device 22 connected to this timing belt is moved, so that the chuck device 22 with the bundle of copy papers sandwiched therebetween is operated. It is moved to the binding device 23 (the direction of arrow A in FIG. 2, the direction orthogonal to the paper surface of FIG. 3). At the time of this movement, a central processing unit (not shown) determines the size and the number of sheets of copy paper stacked on each bin 13, and the speed data to be described later according to the preset size and the number of stacked sheets. Among them, appropriate data is transmitted to the drive motor 24. The drive motor 24 operates on the basis of the transmitted speed data, whereby the chuck device 22 moves in the direction of arrow A, and the copy paper stack on the bin 13 is guided to the paper binding device 23.

After binding the bundle of copy sheets by the paper binding device 23, the chuck device 22 is moved and bound by the drive motor 24 being operated again by the speed data transmitted from the central processing unit. The copy sheet bundle is returned to a predetermined position on the bin 13. This series of operations is performed for all the bins 13 in which the copy sheet bundle is stacked.

FIG. 5 is an explanatory view showing a chuck device movement pattern for each paper size and the number of stacked sheets, and FIG. 6 is an explanatory view showing the rotation speed of the drive motor in each speed pattern shown in FIG.
FIG. 7 is an explanatory diagram showing experimental data. Here, as shown in these figures, the central processing unit, when the size of the stacked copy sheets is small or the number of stacked sheets is small among the preset speed data, that is, the drive motor If the load on 24 is small, fast speed data is selected, and conversely, if the size is large or the number of stacked sheets is large, slow speed data is selected.

Next, the speed setting control of this embodiment will be described with reference to the flowchart of FIG. First, the size of stacked sheets is checked (step 1-1), and then the number of stacked sheets is checked (steps 1-2 and 1-3). Regardless of the paper size, when the number of stacked sheets is about 2 to 10, the speed pattern A (shown in FIGS. 5 and 6; the same applies hereinafter) (step 1-4), the number of stacked sheets regardless of the sheet size Is about 11 to 20 sheets, the speed pattern B (step 1-5) is small, medium size is about 21 to 29 sheets, and small sheet size is about 30 to 50 sheets. When the number of sheets is approximately, the speed pattern C (step 1-6), the paper size is large, and the number of sheets is 21 to 21.
Speed pattern D when the number of sheets is about 29 or when the size of the sheet is medium or large and the number of sheets is about 30 to 50.
(Step 1-7) is selected, and the speed data is transmitted to the drive motor 24. The relationship of the moving speed of each speed pattern is A>B>C> D.

In the above embodiment, the bundle of copy sheets is sandwiched and guided to the paper binding device 23 according to the size and the number of sheets of copy sheets discharged from the copying machine main body 1 and distributed and stacked on each bin 13. A chuck device 22 is provided, which is capable of changing the speed and the moving speed of the operation of sandwiching the bundle of copy sheets for which the binding process is completed and returning the copy sheet bundle to the respective bins 13,
Since the moving speed of the chuck device 22 is slowed down as the sheet size increases and the number of stacked sheets increases, the capacity of the drive motor decreases when the size of the stacked copy sheet bundle is small or when the number of stacked sheets is small. The chuck device 22 is moved at the fastest speed in the inside, and it is possible to move the chuck device 22 faster than the conventional chuck device that moves at a constant speed. As a result, the binding process time is short,
It is possible to obtain a sheet post-processing device with good productivity.

In the above embodiment, the copy sheet bundle is moved at a speed that does not disturb the copy sheet bundle according to the size of the ejected copy sheets and the number of stacked sheets, so that the copy sheet bundle can be moved stably. Therefore, it is possible to obtain the sheet post-processing apparatus having good binding accuracy.

[0022]

According to the inventions of claims 1 and 2,
When the size of the stacked copy sheets is small or the number of stacked sheets is small, the chuck means is moved at the fastest speed within the capability of the drive motor, which is faster than the conventional chuck device that moves at a constant speed. It is possible to move, and as a result, the binding processing time is short,
It is possible to obtain a sheet post-processing device with good productivity.

According to the third aspect of the invention, the copy sheet bundle is moved at a speed that does not disturb the copy sheet bundle according to the size of the ejected copy sheets and the number of stacked sheets, so that a stable copy sheet bundle can be formed. It is possible to obtain a sheet post-processing device that can be moved and has good binding accuracy.

[Brief description of drawings]

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

FIG. 2 is a perspective view centering on a bin of the sheet post-processing apparatus according to the exemplary embodiment of the present invention.

FIG. 3 is a configuration diagram of a chuck device of a sheet post-processing device according to an embodiment of the present invention.

FIG. 4 is a flowchart of control contents of the present invention.

FIG. 5 is an explanatory diagram showing chuck device movement patterns for each paper size and number of stacked sheets.

6 is an explanatory diagram showing the number of rotations of a drive motor in each speed pattern shown in FIG.

FIG. 7 is an explanatory diagram showing experimental data.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Copier main body (image forming apparatus) 13 Bin 22 Chuck device (chuck means) 23 Paper binding device (binding means) 24 Motor

Front page continuation (72) Inventor Yuji Ueno 2-28-24 Izumi, Higashi-ku, Nagoya, Aichi Yokota Building, Ricoh Elemex Co., Ltd. (72) Nobuyoshi Seki 2-28-24 Izumi, Higashi-ku, Nagoya, Aichi Building Ricoh Electrics Co., Ltd. (72) Inventor Mitsuru Ichikawa 2-28-24 Izumi, Higashi-ku, Nagoya-shi, Aichi Yokota Building Ricoh Electrics Co., Ltd.

Claims (3)

[Claims] 1. Copy sheets discharged from an image forming apparatus are distributed and aligned in bins arranged in multiple stages and moving vertically.
In a sheet post-processing device that performs post-processing such as binding on the copy sheets, a copy is made to the binding unit according to the size and the number of sheets of copy sheets that are discharged from the image forming apparatus and distributed and stacked on each bin. A sheet post-processing apparatus comprising: chucking means capable of changing a speed at which a sheet bundle is pinched and guided and a moving speed at which an operation for pinching a copy sheet bundle that has been bound and returned to each bin is changed. 2. The sheet post-processing apparatus according to claim 1, wherein the moving speed of the chuck means is decreased as the sheet size increases and the number of stacked sheets increases. 3. The sheet rear member according to claim 1, wherein the moving speed of each of the chuck means at each operation is set to a speed at which the copy paper stack stacked on each bin is not disturbed when moving. Processing equipment.