JPS63141084A - Copying machine - Google Patents

Abstract

PURPOSE:To copy a document, etc., page by page while erasing punch hole images, etc., of both spread surfaces by forming images of respective areas obtained by dividing an original image equally by two on different forms when a division copy mode or center binding margin erasure mode is specified. CONSTITUTION:This copying machine is equipped with a division copy mode input means 91 which specifies the equal division of the original image into two at right angles to a scanning direction and the formation of images of respective areas on different form surfaces, a center binding margin erasure mode input means 96 which specifies the inhibition of image formation to prescribed width nearby the two-equal-dividing part, an electrostatic discharging means (inter-image erasure unit 4) which is arranged nearby a photosensitive body and discharges the photosensitive body electrostatically, and a control means for commanding the electrostatic discharging means to discharge the photosensitive body electrostatically to corresponding prescribed width prior to development when the division copy mode or center binding margin erasure mode is specified. Consequently, a blank is formed by erasing images of a center binding margin part such as punch holes of a book.

Description

Detailed Description of the Invention [Industrial Application Field 1] The present invention relates to a copying machine that can form margins for binding margins, etc. on copy paper when copying both sides of a double-page spread such as λ by split copying. For example, it is possible to erase a punch hole or the like located in the center of mm.

[Prior Art] Conventionally, copying machines have been proposed that have a so-called editing function that copies only a specific area of a document onto a sheet of paper. By using such a Keio photocopy with an editing function, by specifying the binding portion of the manuscript as a specific area that is not desired to be copied, it is possible to obtain a clean copy with unnecessary images such as punch holes removed from the manuscript. On the other hand, there have been conventionally provided copying machines that can perform book division copying. Such book division copying allows, for example, when a book is used as a copy manuscript, two pages of a book spread can be copied one page at a time onto different copy paper surfaces in one operation.

[Problems to be Solved by the Invention] However, in order to delete both sides of the double-page spread of II with a punch hole in the center and copy one side at a time using the above-mentioned division copy and above-mentioned IIA collection functions, After making a separate copy, each copy sheet had to be copied again using an editing machine, which was a time-consuming process.

The present invention has been devised in view of the above-mentioned circumstances, and it is possible to easily and quickly erase images in the center binding portion such as punch holes of a book to remove blank spaces without using the edit input function during split copying. The purpose is to provide a copying machine that can be used to create a copy machine.

[Means for Solving the Problems] A copying machine according to the present invention forms an electrostatic latent image on a photoreceptor according to an image signal obtained by optically scanning a document image, and A copying machine that develops a latent image with toner and transfers the toner image onto a sheet of paper to form an image, the document image being divided into two equal parts in a direction perpendicular to the scanning direction, and each of the two equal parts being divided into two equal parts. a division copy mode input means for specifying that an image of the area is to be created on each side of the paper; a center binding erase mode input means for specifying prohibition of image formation of a predetermined width in the vicinity of the bisected portion; a charge removing means disposed near the photoconductor to remove the charge on the photoconductor; and when the divided copy mode and the center binding margin erase mode are specified, the charge removal unit removes the charge on the photoconductor corresponding to the predetermined width; It is characterized by comprising a control means for instructing the charge removal means to perform removal prior to the development.

The configuration requirements will be explained below.

The present invention is applied to a so-called electrophotographic copying machine that forms an electrostatic latent image on a charged photoreceptor, develops it with toner, and transfers it onto paper.

Here, for example, a key switch can be used as the division copy mode combing input means and the center binding margin erase mode input means.

The predetermined width for prohibiting image formation specified by the center binding margin erase mode input means is not particularly limited, and may be set as a standard width required for erasing punch holes, or may be set according to the size of the copy paper. It may also be variable.

The charge removing means may be constructed by, for example, arranging a large number of light emitting elements such as LED elements close to the surface of the photoreceptor so as to irradiate any part of the surface of the photoreceptor.

Incidentally, in the present invention, the term "electrification removing means" includes a case where the designated area is not charged from the beginning.

[Example] The present invention will be described below with reference to specific examples shown in the drawings.

(1) Description of the main body of the copying machine FIG. 1 is a schematic diagram showing the structure of the main body of the copying machine according to the embodiment.

As shown in the figure, the copying machine includes an optical system 5 (51 to 55) that scans a document and transmits a light source, and an image forming unit 6 (61 to 69) that performs a copying operation to reproduce a light image on copy paper. and a paper feed/discharge system 7 (71 to 76) that supplies and sends copy paper,
It has a glass original table 8 on which the original is placed.

The optical system 5 is composed of a scanning system and a magnification setting system, and the scanning system is composed of a first scanning body (not shown) equipped with a light vAL and a mirror 51, and a second scanning body (not shown) equipped with mirrors 52 and 53. be done. Further, the magnification setting system is composed of a mirror 54 and a lens 55. The above scanning system is the original platen 8.
It moves back and forth along the lower surface of the scanner, and when it moves forward, it exposes and scans the surface of the document placed on the document table. At this time, the light reflected from the original by the light source is reflected by the mirrors 51, 52, and 53, passes through the lens (variable lens block) 55, is further reflected by the mirror 54, and reaches the photoreceptor drum 61. An image is formed on the surface of the drum 61. The first and second scanning bodies are
They are driven in conjunction with each other by the same scanning motor M3.

The moving speed is relative to the circumferential speed ■ of the photoreceptor drum 61.
The mirror 51 is V/N (N: copying magnification), and the mirrors 52 and 53 are V/2N in order to keep the optical path length constant.
It is. On the other hand, the mirror 54 and lens 55, which are a magnification setting system, are driven in conjunction with another stepping motor M4. That is, the lens 55 moves on the optical axis to change the copying magnification, the mirror 54 moves and swings,
Correct the image point. A pulse generator is attached to the motor M3 coaxially with the output shaft, and information regarding the rotational position and speed of the motor M3 is obtained from the generated pulses.

The image forming unit 6 includes a photosensitive drum 6 that can be rotated in the direction of the arrow.
1, a main eraser lamp 62 arranged around the drum 61, a sub charger 63, a sub eraser lamp 64, a main charger 65, an inter-image erase unit 4, a developing device 66, a transfer charger 67, and a copying device. It consists of a paper separation charger 68 and a blade type cleaning device 69. A photoreceptor layer is formed on the surface of the drum 61, and the photoreceptor layer is sensitized and charged by passing through the eraser lamp 62.64 and the charger 63.65, and the photoreceptor layer is sensitized by passing through the eraser lamp 62, 64 and the charger 63, 65. An electrostatic m-image is formed by receiving slit exposure. It should be noted that no electrostatic latent image is formed in the area where the charge is removed by the inter-image erase unit 4 prior to the formation of the optical image.

Toner is attached to the electrostatic latent image in the developing device 66, and the attached toner is transferred onto copy paper (supplied from the paper feed/discharge system 7) in the transfer charge t67.

The paper feed/discharge system 7 includes paper cassettes 71 and 72, a pair of delivery rollers 711 and 721 for each cassette, and a pair of transport rollers 7.
12.713, timing roller pair 73, conveyor belt 7
4, a fixing device 75, a pair of discharge rollers 76, etc., which are driven by a main motor M1.

(2) Explanation of the operation panel FIG. 2 is a plan view of the operation panel 9 of the copying machine.

As shown in the figure, the panel 9 includes a print key 90 for starting the copying operation, a division copy key 91 for selecting the book division copy mode, a binding margin erase key 96 for selecting the binding margin erase mode, and paper stored in the paper cassettes 71 and 72. A copy paper selection key 92 for selecting the copy paper according to the size, an up key 932 and a down key 931 for changing the copy density, and numeric keys (1.2, . . . , respectively) for inputting the number of copies or copy magnification. 9, corresponds to the numerical value of O) group 94, a group of magnification setting keys 95 for calling a preset copy magnification, a group of magnification setting keys 950 for reading and calling an arbitrary copy magnification, a group of keys 95 for reading and calling an arbitrary copy magnification.
Arranged are an arbitrary magnification setting mode switching key 97 that allows magnification reading of 0 to function, a clear/stop key 98, an interrupt key 99, and a display panel 900 that displays the number of copies or the value of the copy magnification in segments. In the figure, each small square is an LED lamp that indicates that the keys in its vicinity are in operation. For example, when the split copy key is on, the LED 91a lights up, and when the margin erase key is on, the LED 91a lights up. Now, LED96a
lights up.

(3) Explanation of the drawing section FIG. 3 is an explanatory diagram of the control section 11 of the copying machine.

As shown in the figure, the control unit includes a first CPU 21, a second CPU 21,
It has PU22 and RAM23.

The first cPLJ 21 drives the image forming section 6 and paper feed/discharge system 7 (the driving is performed by motors M2 and Ml, respectively), drives the driver 400 of the inter-image erase unit 4 (described later), and controls the display panel 900. υJIG the main operations of the copying machine, such as numerical display and other temperature control.

The second CPU 22 controls the driving of the scanning motor M3 and the stepping motor M4 (copy magnification setting motor) in accordance with commands from the first CPU 21.

The RAM 23 is used for writing various data such as copying operation control data, magnification setting data, etc. (data is given from input from each operation key and a sensor that detects the operating status of various devices, and from the CPU's ROM), and Used for reading.

In the figure, 30 is a drive circuit for the scanning motor M3, 35 is a drive circuit for the stepping motor M4, and output terminals A1 to A7 of the first CPIJ 21 are connected to the main motor M1, the developing motor M2, and the timing roller. 7
3, the clutch of the delivery roller 711, the clutch of the delivery row 5721, the charging charger 65, and the transfer charger 67, respectively.

(4) Description of the inter-image erase unit 4 FIG. 4 is a perspective view of the inter-image erase unit 4 disposed close to the photoreceptor drum 61, and FIG. FIG. 7 is an explanatory diagram for erasing charge corresponding to the width of the binding margin on the front end or rear end of the sheet in the paper feeding direction.

As shown in the figure, the inter-image erase unit 4 includes a large number of LEDs.
It has an LED array 4o in which light emitting elements are arranged in one row,
By causing the LED element to emit light, the photosensitive drum 6
The electrostatic charge is removed from the corresponding area on the surface of the image forming apparatus 1 to prevent the formation of an electrostatic latent image on the area.

In addition, as shown in the figure, in order to remove the charge corresponding to the width of the binding margin at one end of the copy paper, all the LED lamps are turned on from the end time of timer T+ to the end time of timer T2. Now.

(5) Operation description FIG. 6 is a flowchart showing an outline of the processing of the first CPU 21.

The first CPU 21 starts processing by turning on the power, and first sets an initial state (8401).

That is, the RAM 23 and flags are set to the initial state, and the various modes of the copying machine are set to the standard mode (eg, copy magnification 1.
0 times, 11! Number of copies: 1, copy paper size: 84. etc.).

Next, an internal timer is set (8403), and a copy operation processing routine is performed (8405). Next, a split copy key processing routine is executed (3407). Further, a margin erase key processing routine is executed (8408).

After that, input/output or communication of various data and command signals (data is given from keys on the operation panel, sensors that detect the operating status of each P1 device, second CPU 22, and RAM 23), segment numerical display, salinity adjustment, etc. [Other processing] is performed (S409).

After performing the above processing, when the internal timer ends (84
11) Return to 8403 and repeat the loop.

FIGS. 7 (Part 1) to (Part 4) are flowcharts showing details of the copy operation processing routine (8405).

Upon detection of the input of the print key 90 (8501), the copy operation process is started.

First, the copy start flag is set to "1" (S503),
The flag is determined at 5505. Next, main motor M1, developing motor M2, and charger 63.65
, and the transfer charger 67 are each turned on,
Timer TA1TB is set. Further, the copy start flag is lowered (8507). Here, timer T
A defines the clutch off time of the paper feed rollers 711 and 721, while timer TB defines the scanning start time.

In the next steps 8509 to $515, the upper cassette 71
Or, turn on the clutch of the paper feed roller 711 or 721 of the selected cassette among the lower cassettes 72,
Start feeding copy paper.

Subsequently, in 5517, it is determined whether the timer TA has expired,
The clutches of the paper feed rollers 711 and 721 that have been turned on are turned off (S519) to stop feeding the copy paper.

Next, in 8521, the end of the timer TB is determined, and a scan start signal (scan signal) is output to the second CPU 22.
is set to "1'' (8523).

The second CPU receives the signal and starts scanning processing, which will be described later.

In step 5525, it is determined from the lighting of the LED 96a whether or not the binding margin erase mode is selected. The LE
When D is not lit, the inter-image erase (LED lighting) flag is set to 0'' and the LED element of the inter-image erase unit 4 is turned off (8526).

On the other hand, if the margin erase mode is selected,
LED9 indicates whether split copy mode is selected.
The determination is made based on the lighting of 1a (S527). When the LED is not lit, that is, when only the margin erase mode is selected, timer 1 is set (8528). Timer ■ is a timer for delaying the turn-off time of the LED of the inter-image erase unit 4, which is already in the on state, in order to prevent toner from being deposited outside the copy image forming area (
8547, 549), the timer removes the charge in the image forming area by the amount of the delay in the off time, and an image corresponding to the binding margin specified by the timer is not formed on the leading edge of the copy paper in the paper feeding direction. Become. In addition, in 5527, if the division copy mode is selected, it is determined whether the book A side copy signal, which will be described later, is 1'' (5530), and if it is 1, the timer F (S531). This timer specifies the timing to turn on the LED of the inter-image erase unit 4 in order to form a binding margin at the trailing edge of the copy paper in the paper feeding direction (8539.8543). ).Also, the inter-image erase flag is set to "O" (8532), and the LED of the inter-image erase unit 4, which is in the on state, is turned off in order to prevent toner from being deposited outside the image forming area. Next, when the book A side copy signal is not "1", it is determined whether the book B side copy signal, which will be described later, is 1'°. (
8533). When the book B side copy signal is “1”,
A timer G is set (S535). The timer G is a timer that defines the time during which the LED of the 11-interval erase unit 4 is turned on in order to form a binding margin at the leading edge of the copy sheet in the paper feeding direction. That is, at the end of the copy image forming area, the LE of the inter-image erase unit 4 to be turned off is
The on state of D is maintained (S541.8543). or,
Timer H is set (8536).

The timer H is a timer that defines the timing to prevent the LED of the inter-image erase unit 4 from turning on when the binding width is exceeded (S545.549)f
.

Next, in 5555, the timing signal output from the second CPU 22 is determined.

When detecting that the timing signal is “1”,
The clutch of timing roller 73 is turned on, copy paper is fed between photosensitive drum 61 and transfer charger 67, and transfer to the copy paper is started. Also, timer TO is set (8557). The timer TO
defines the scanning end time, the charging end time, and the off time of the clutch of the timing roller 73 (S559.5
561) It is a timer whose setting time is 5509 to 5.
It is determined by the size of the copy paper selected in step 511 and the set copy magnification.

Next, at 8563, it is determined whether the return signal output from the second CPLI 22 is 0.1''.

When the return is started (S563) and the multi-copy is finished (8565), it is determined whether the divided copy mode is selected by lighting the LED 91a. (85
67). When in division copy mode, it is determined whether the B-side copy signal is 1'' (8569).

Here, of the two areas into which the original is equally divided in the direction perpendicular to the paper feeding direction, the area closer to the reference position of the first scanning body is called the 8th side, and the farthest area is called the A side. Further, 8-sided copy refers to the first copy under the division copy mode.

Note that the A-side copy is the second copy.

When the B side copy signal is 1'' (8569), the B side copy signal is set to 0'' and the A side copy signal is set to 1 (
S573 and 575), a copy start flag is set, and preparations are made to perform the second copy, ie, side A copy (8575).

Also, if the B side copy signal is not 1'' (8569)
, since the A-side copy signal is "1", the A-side copy signal is set to "0" (8577), and the B-side copy signal is set to "1".
(S579). The B-side copy signal and A-side copy signal are each output to the second CPU 22.

Next, the first scanning body returns to the reference position and the second CPU 22
When a home position signal is issued from (S581), the developing motor M2 and the transfer charger 67 are turned off, and the timer TD is set (8583). Timer TO is
This is a timer that defines the LED off time of the main motor M1 and the inter-image erase unit 4 (8587.8589)
.

Note that if the multicopy and - are not completed at 8565, a copy start flag is set (8585) and the copy operation is executed again.

Next, in step 8591, each of the above control signals is output to control external equipment and to transfer the signals to other CPUs.

In this way, the copy operation is performed.

FIG. 8 is a flowchart showing details of the split copy key processing routine performed in step 5407 above.

When the split copy key 91 is turned on (3603), it is determined whether the split copy mode display LED 91a is lit. Note that the LED 91a serves as a means for determining whether or not the divided copy mode is selected in the copy operation processing routine (S527). If this split copy mode display LED 91a is lit, it means that split copy mode has already been selected, so turn off the LED to cancel the split copy mode designation (8609), and output to the second CPtJ22. Both the A-side copy signal and B-side copy signal to be output are set to 0°' (861
1.8613). Also, split copy mode display LED91
If a is not lit, turn on the corresponding LED (
8615), selects the division copy mode, and sets the A-side copy signal to "'O" and the B-side copy signal to
7.8619).

FIG. 9 is a flowchart showing details of the margin erase key processing routine performed in step 8408.

As shown in the figure, when the margin erase mode selection display LED 96a is already lit by turning on the margin erase key 96 (S630), '(3632)
, turn off the LED 96a to cancel the mode56.
34) If the LED 96a is not lit, it is lit and the mode is selected (8636).

FIG. 10 (Part 1) is a flowchart showing an outline of processing in the second CPU 22. FIG. As shown in FIG. 7, the second CPU 22 starts processing by turning on the power, and first performs initial settings (8701). Next, an internal timer is started (S703), a copy magnification processing routine (8705) and a scanning processing routine for copying operation (S708) are performed, and after waiting for the internal timer to end, processing is performed at 870.
Return to step 3 and repeat the loop.

As shown in FIG. 10 (Part 2), when there is an interrupt from the i-th CPU 21 (3713), the first CPU 2
1 (8715). That is, the magnification setting processing routine and the scanning processing routine are executed on the condition of a command from the first CPU 21.

FIG. 11 shows the scanning processing routine (870) of the second CPU 22.
8) is a flowchart showing details of step 8).

The scanning processing routine mainly controls the movement of the scanning system.

First, it is determined whether the divided copy mode selection display LED 91a is lit (S803). The LED9
When 1a is lit, that is, when the division copy mode is selected, it is determined whether the front side copy signal output from the first CPU 21 is 1'' (5805), 1
If it is not 1111, it is determined whether or not the B-side copy signal is "1" (8807). When the B-side copy signal is "1", the first scanning body starts from the reference position and starts feeding. It is determined whether scanning (movement) has been performed in the paper direction (vapor length of copy paper x magnification) (S809). When the first scanning pause has finished moving to the corresponding position, exposure scanning of eight surfaces is started, and a timer is set in consideration of the scanning speed (8811). The timer T is a timer that measures the feeding timing of copy paper, and when the timer ends, the timing signal is set to "1°" (S815.58
17). At the same time, a scan length timer is also set that takes into account the vapor length in the paper feeding direction and the set magnification (S
813). When the scan length timer ends (8819), or when the first scanning body scans the document table glass in the paper feeding direction (S821), the scan signal is set to 0'' and the return signal is set to 1 (S823). 1. Return the scanning object to the reference position.

Next, when the Δ side copy signal is “1°°, the normal position 5W5
Due to the offset of 0 (S825), the timer T and scan timer are set in the same way as above (S827.5).
829). Here, the fixed position 5W50 is used to detect whether the scanning system is at the reference position during scanning.

[Effects of the Invention] As described above, according to the copying machine of the present invention, when the division copy mode and the center binding margin erase mode are specified, the predetermined width in the vicinity of the portion where the original image is divided into two equal parts is , the image of each area divided into two equal parts is divided into 8 without being imaged.
Images are created on different sheets of paper. Therefore, with an extremely simple operation, it is possible to copy both sides of a double-page spread of a document, etc., one side at a time, while erasing unnecessary images, such as punch holes, in the central binding area.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the structure of a copying machine main body according to an embodiment. FIG. 2 is a plan view of the operation panel 9 of the copying machine. FIG. 3 is an explanatory diagram of the control section of the copying machine. FIG. 4 is a perspective view of the erase unit 4 disposed close to the photosensitive drum 61, and FIG. 5 is a perspective view of the erase unit 4 arranged close to the photosensitive drum 61. FIG. FIG. 6th
The figure is a flowchart showing an outline of the processing of the first CPO 21. FIGS. 7 (Part 1) to (Part 4) are flowcharts showing details of the copy operation processing routine. FIG. 8 is a flowchart showing details of the split copy key processing routine. FIG. 9 is a flowchart showing details of the binding margin erase processing routine. FIG. 10 (Part 1) (Part 2) is a flowchart showing an outline of the processing in the second CPU 22. FIG. Figure 11 shows the second CPU
22 is a flowchart showing details of the display processing routine of No. 22. 4... Inter-image erase unit 61... Photosensitive drum 91... Divided copy key 96... Binding margin erase key

Claims (3)

[Claims] (1) Form an electrostatic latent image on a photoconductor according to an image signal obtained by optically scanning a document image, develop the electrostatic latent image with toner, and transfer the toner image onto a sheet of paper. A copying machine that creates images by transferring, which divides the original image into two equal parts in a direction perpendicular to the scanning direction, and creates images of each of the two equal areas on different paper surfaces. a division copy mode input means for specifying; a center binding erase mode input means for specifying prohibition of image formation in a predetermined width near the bisected portion; and if the divided copy mode and the center binding margin erase mode are specified, the charge removing means is instructed to remove the charge on the photoreceptor corresponding to the predetermined width, prior to the development. A copying machine comprising: a control means; (2) The copying machine according to claim 1, wherein the image signal is a white light signal obtained by optically scanning an original image. (3) In claim 1, the image signal is an optical signal obtained by optically scanning a document image.
A copying machine uses a laser light signal that is modulated with an electrical signal obtained by photoelectric conversion and a predetermined correction.