JPS617856A - Method and device for shifting of copying image position in electrophotographic copying device - Google Patents

Abstract

PURPOSE:To shift easily a copying image position by controlling relatively both timings for starting scanning of an original and supplying of copying paper so that the recording of the copying image is started from the desired position on the copying paper. CONSTITUTION:Information (a), (b) on an original, information A, B, L, etc. on copying are inputted by a data input device 5 to a recording means 11 of a computer 10. A detector detects the front end of the original when the operator sets the original on the table in an original scanning part. A CPU17, upon receiving the signal thereof, resets the counting N and J of a means 13 for counting the feed rate of the original and a means 14 for counting the feed rate of the copying paper. An arithmetic part 12a counts the feed rate X of the copying paper. The original is fed by the X by an original feeder 21 via a feed control part 15 when a discriminating part 12b discriminates that the X is positive. The pulses from a pulse generator 22 connected to a feed roller are counted by a counting means 13. The copying paper is fed by a copying paper feeder 23 when the count value N coincides with the value X. The pulse signals from a pulse generator 24 are counted by the means 14 and the copying is started when the count value J coincides with the feed rate A of the copying paper.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is an electrophotographic method in which the recording position of a copied image is shifted by a predetermined amount from the leading edge of copy paper as necessary. The present invention relates to a method for shifting the position of a copy image and an apparatus therefor.

Prior Art When copying a necessary picture (including letters, figures, etc., hereinafter the same) in a manuscript using an electrophotographic copying machine, for example, one side of the copy paper on which the copy has been recorded is closed and filed. When the operator needs to make a binding, it is necessary to provide a ``binding margin.'' The practice was to shift only the quantity and then make a copy of the record.

Alternatively, if it is necessary to add explanatory text above or below the copied figure, as described above, shift the original by a predetermined amount on the document table or remove the copied figure part. I cut it out, pasted it on a larger piece of blank paper, and added the desired margins at the top and bottom of the shape.

In such office electrophotographic copying machines, when an operator places a document on the document table, he or she visually adjusts the document placement position, thereby adjusting the copy image on the copy paper.
It is possible to shift and record the relative position of the image on the document, for example A. In industrial electrophotographic copying machines for copying sized drawings, etc., the operator does not place the original directly on the document table;
′ When the operator inserts a document from the document feeder,
The structure is such that the original is automatically conveyed to the original scanning unit and positioned, so the image position to be copied on the copy paper is engraved at the image position on the original, like in an office electrophotocopy machine. It has not been easy to record images with a relative shift in a large industrial electrophotographic copying apparatus.

<Problems to be Solved by the Invention> However, the present invention has been made in view of these inconveniences, and even in a large electrophotographic copying machine such as the industrial electrophotographic copying machine, the above-mentioned office use An object of the present invention is to provide a method and apparatus for easily shifting the position of a copied image, such as in an electrophotographic copying machine.

<Means for Solving the Problems> In order to achieve the above object, the present invention, for example, as shown in FIGS. , the dimensions of the picture 2 itself are taken as original information, the dimension A from the leading edge of the copy paper 3 to the copy-recorded picture 4, and the dimension B of the copy-recorded picture 4 itself are taken as copy information, and the copy is made. When the magnification is 1η (=B/b), if A>m・a, the copy paper 3 is advanced by a length corresponding to A−m−a before starting scanning of the original 1, and conversely, If A<m-a, then from scanning original 1, 1]
By delaying the copy paper 3 by a length corresponding to 1.a-A and later feeding the copy paper 3, the copy image 4 is always recorded from a position shifted by a desired length A from the leading edge of the copy paper 3. It is characterized by the following.

Hereinafter, embodiments according to the present invention will be described in further detail based on screens.

<Embodiment> FIGS. 7 to 9 show an embodiment of a large-sized electrophotographic copying machine to which the present invention can be applied. FIG. 7 is a perspective view of this electrophotographic copying machine, Figure 8 shows ■− in Figure 7.
■A cross-sectional view from the arrow side, Figure 9 is the same as in Figure 7.
FIG.

Further, FIG. 3 is a schematic configuration diagram showing the configuration of a document scanning section and a recording section of this electrophotographic copying machine.

First, an outline of this electrophotographic copying machine to which the present invention is applied will be explained with reference to FIGS. 3 and 7 to 9.

A production panel 50 is disposed approximately in the center of the electrophotographic copying machine shown in FIG. This is a recording section 200.

As shown in FIG.
is fed in the direction of arrow E by the document feeding device 21, and the image 2 on the document is transferred to a pair of mirrors 101 and 102 and a lens 1.
03, the photoconductive photosensitive drum 201 rotating in the direction of arrow F is subjected to slit exposure. The latent image thus formed on the photosensitive drum 201 is visualized by a developing device 205, which will be described later, and is visualized by a copy paper feeding device 23.
The visualized toner image 2' is transferred onto the fed copy paper 3, and a copy image is recorded.

In FIG. 3, a pair of mirrors 10J and 102 are fixed to frames 104 and 105 symmetrically at an angle of 45 degrees, and a lens 10 is placed between these two mirrors IQ and 1, 102.
3 is movable in the direction perpendicular to the optical axis independently of the mirror 1 (eye, 102) and by means not shown in the front axis direction (horizontal direction in the paper). An optical bench 106 supporting an optical system 26 consisting of a lens 103 is supported by a base frame 107 so as to be movable up and down to vary the optical path length.
7. Further move the lens 103 as a whole.

The copying machine main body base 108 is movable in a direction parallel to the
It is placed on the .

Therefore, when changing the copy magnification, the optical bench 10
The motor 110 for moving the optical bench 106 up and down can be directly controlled by the operation switch on the operation panel 50, or can be automatically controlled via the computer 10, which will be described later. A motor 1 ( ) for moving to change the optical path length of the optical system 26 and to move the lens] 03 in the optical axis direction.
The optical system 26 can be set to a desired copying magnification by controlling the drive of the motor 9 in the same manner as the motor 110.

Furthermore, a motor 1 for moving the base frame 107 left and right
11 to morph 10! It is possible to shift the entire optical system 26 to the left and right by controlling the drive in the same way as in the cases of No. and 110, and simultaneously move the lens 103 independently in a direction perpendicular to its front axis. fA
The pattern 2 in ] is shifted to the right or left as appropriate with respect to the copy paper 3, so that only the necessary portion can be copied.

The document feeding device 2 shown in FIG. 3 is composed of a large number of feeding rollers 112 and a document feeding motor 120, as shown in detail in FIG. The image 2 is placed and inserted onto the table 130 with the image 2 facing down, and is fed to the document feeding device 21.

Further, in FIG. 8, a detector 122 for detecting the leading edge and trailing edge of the original 1 being conveyed in the middle of the feeding path 121 of the original 1 is provided, and a detector 122 for detecting the leading edge and the trailing edge of the original 1 is disposed at a subsequent stage. An illumination unit 140 is provided, which includes a pair of light sources 141 and 142 for illumination, a heat-insulating glass 143, a document glass 144, a document floating prevention plate 145, etc., and the document 1 fed to the illumination unit 140 and scanned is Normally, the document passes through a discharge path 125, turns I), and is discharged onto a plate 124 from a document tray provided above the front face of the copying machine.

Here, in order to record a large number of copy images 2 using the same original 1, the original repeating device 150 is arranged to include a feeding path 123 facing the illumination section 140. , the document j is configured to be scanned by the illumination section 140 after passing through the return path 151 of the document repeater 150 a required number of times.

If the document 1 is formed of a relatively thick sheet material and it is inconvenient to bend it, the document tray is discharged onto a plate 127 via a discharge path 126 extending toward the rear of the copying machine.

On the other hand, in the recording section shown in FIG.
1, there are a charger 202, a side charge remover 203 that removes charge from areas other than the image area, and prevents the occurrence of so-called black frames.
'Exposing section 204, toner developing device 205, copy paper feeding section 2() 6, toner transfer device 207, copy paper separating device 208
, a static eliminator 209, a cleaning device 210, and a static eliminator 211 for previously removing static from the entire surface of the photosensitive drum 2()1.
is installed.

The copy paper feed section 206 also has paper feed paths 212 and 213 corresponding to each one so that a plurality of rolled copy papers 3a having different paper widths can be appropriately selected and fed.
A cutter device 215 is provided at the end of the paper feed path 214 where the two merge, and a cutter device 215 is provided to cut the copy paper 3a according to the required length. It is provided separately and is configured so that a sheet-like copy paper 3b can also be fed, if necessary.

Further, the copy paper 3 on which the toner image 2' has been transferred and recorded by the toner transfer device 207 is transferred to the photosensitive drum 201 by suctioning and holding the back side of the copy paper 3 by the copy paper separating device 208.
The image 2' is separated from the image 2' and is adsorbed and held by the endless belt 217, and is conveyed while being pressed against the endless belt 217 by the wind pressure of the fan 218. The copy sheet receiver is configured to be fused and fixed and discharged onto a plate 220.

The electrophotographic copying machine to which the method according to the present invention is applied has the configuration as described above, and the method according to the present invention will be explained in more detail below with reference to the drawings.

As described above, FIGS. 4 to 6 are diagrams showing the arrangement of the pattern 2 of the original 1 and the copy paper 3, and the recorded pattern 4, respectively.

4 and 6, the feeding direction of the original 1 (arrow E
), the dimension 8 from the leading edge of document 1 to the leading edge of pattern 2 and the dimension from the leading edge of pattern 2 to the trailing edge are as follows:
The dimension C from the rear end of the pattern 2 to the rear end of the original 1 is taken as original information.

On the other hand, in FIG. 5, similarly, the dimension A from the leading edge of the copy paper 3 to the leading edge of the copied pattern 4, the dimension B from the leading edge to the trailing edge of the copied pattern 4, and the dimension B of the copied paper 3.
Dimension L (=A+B) in the feeding direction (indicated by arrow F)
(10C) is the copy information.

In the present invention, these original information a, b and copy information A, B, L are inputted into a computer 10, which will be described later, and the original 1 is set on the table 130 of the copying machine. When copy recording is started, the copy image 4 is recorded at a position shifted by a desired amount A from the leading edge of the copy paper 3, as shown in FIG. tIS5.

FIG. 1 is a block diagram showing the overall configuration of an apparatus for shifting the recording position of a copy image according to the present invention, and FIG. 2 is a central control unit (hereinafter referred to as:
FIG. 3 is a flowchart illustrating commands by the system (referred to as PU), and FIG. 3 is an embodiment diagram corresponding to the configuration of FIG. 1.

In FIG. 1, 5 is the operation panel 5 (,1(I!7
This data input means 5 is used to summarize the above-mentioned information W, information a, 1] and copy information A, B, L, etc. Enter it in. Thereafter, when the original 1 is inserted and set in the center of the table 130 of the original scanning unit 100 with the pattern 2 facing downward, the leading edge of the original 1 is placed on the detector 12.
In response to this detection signal, the CPU 17 calculates the counts mN and J of the original feeding amount counting means 13 and the copy paper feeding amount counting means 14 in the computer 1° so that N=o, J=.

Reset as .

In the figure, reference numeral 12 denotes a calculation/judgment means having a calculation section 12a and a judgment section 12b. First, the calculation section 12a calculates the copy magnification m(-B/I), and based on the result, CPLJI?
In response to a single command signal, the lower drive motor 110 of the optical bench 106 and the left and right drive motors 109 of the lens 103 are controlled, and the optical system 26 of the copying machine is set so as to obtain a desired copying magnification.

In addition, the calculation section 12a calculates the backward feed amount of the copy paper 3 x (=m-a-A) as a total W, 11, and when the determination section 12b determines that this amount X is positive, the CPU 17 The motor 1 of the document feeder 21 is activated by the signal from the feed control unit 15.
20 is driven, and the document 1 is fed by the feeding roller 112 by a length corresponding to (1η·a−A).

At this time, the pulse generator 2 connected to the feeding roller 112
The second pulse signal is sequentially counted by the original feeding amount counting means 13 in the computer 10, and when the counted value N matches the value corresponding to the backward feeding amount x, the CPL is simultaneously activated.
, 117, the copy paper feeding device;? The motor 230 of No. 3 is driven, and the copy paper 3 begins to be fed by the feeding roller 221.

The pulse signals from the pulse generator 24 connected to the copy paper feed roller 221 are sequentially counted by the copy paper feed amount counting means 14 in the computer 10, and the counted value J is When the feeding amount A of the paper 3 reaches a value corresponding to the feeding amount A, the copy recording device 25 is driven and controlled by a signal from the copy control unit 16 of C1l''LJ]7 to start scanning the original and exposing the copy paper. The copying image is recorded from a position shifted by a desired length A from the leading edge of the copying paper 3.Alternatively, the determining section 12b may determine the backward feed amount X (=m
-a-A) is determined to be negative, the CPU 17 drives and controls the copy paper feeding device 23 according to a signal from the feeding control unit 15, so that the copy paper 3 is fed first. When the advance amount matches the amount corresponding to X
When the value corresponding to is reached, the copy control unit 1 of the CPU 17
The copy recording device 25 is driven and controlled by the signal from the copy paper 3, and the copy image 4 is recorded from a position shifted by a desired length A from the leading edge of the copy paper 3.

In FIG. 1, the copying and recording device 25 includes the photosensitive drum 201 and its drive motor 225, the charger 202, the side static eliminator 203, the exposure section 204, the toner developing device 205, and the toner transfer device described in FIG. 207, static eliminator 209,
This corresponds to the cleaning device 210, the static eliminator 211, and the like.

Next, when the feeding amount J of the copy paper 3 reaches a value corresponding to A + B, the driving of this copying and recording device 25 is canceled to stop recording the copy image, and furthermore, the feeding amount J becomes [, (2A +
When the value corresponding to B + C, ) is reached, the feeding of the copy paper 3 is stopped. After that, rotary cutter 215
is operated to cut the copy paper 3, and the copy paper tray outside the machine is ejected onto the plate 22().The paper 3 is also cut by the paper feeder for the required time after the trailing edge of the original 1 is detected by the detector 122. 130, the original 1 is placed on the plate 1 outside the machine.
24 and the electrophotographic copying machine stops.

In this embodiment, a case was explained in which the copy magnification [1] can be changed, but -1 constant magnification [for example, the original size (111
=1) It goes without saying that the method according to the present invention can also be applied to an electrophotographic copying machine formed by a dedicated machine 1.

Furthermore, in this embodiment, a method was described in which the original is fed and scanned with the optical system fixed, but the method according to the present invention conversely fixes the original and drives the optical system. The present invention can also be easily applied to systems that scan originals.

<Effects of the Invention> According to the present invention, the dimension a from the leading edge of the manuscript to the leading edge of the pattern to be copied and the length b of the pattern are used as manuscript information,
The dimension A from the leading edge of the copy paper to the leading edge of the pattern to be copied and recorded, and the length B of the pattern to be recorded are copy information,
When the copy magnification is m (=B/1), A > m
・If a, copy paper is A-m- before starting to scan the original.
Advance the destination by a, and if A < m・a, copy paper m−a
Since the document is configured to be delayed by -A from the start of scanning of the original and then fed later, the copy image can always be recorded from a position shifted by the desired length A from the leading edge of the copy paper.

In the past, it was possible to make copies by closing one side of the copy paper and making a 7-filter, or by making copies with a 1-stitch margin when binding a book, and also by setting the required "margin" as appropriate for the recorded image. The above-mentioned "binding margin" and "
There is no need for too much or too little "margin" or missing necessary picture parts, and the inconvenience caused by "cutting and pasting" can be solved.

[Brief explanation of the drawing]

@ Figure 1 is a configuration diagram of a copying image position shifting device in an electrophotographic copying machine of the present invention, Figure 2 is a flowchart of the shifting device of the present invention, and Figure 83 is a configuration showing the hardware of the shifting device of the present invention. FIG. 4 and FIG. 6 are diagrams showing the arrangement of the original and the pattern to be copied, FIG. 5 is the layout of the copy paper and the recorded pattern, and FIG. A perspective view of the electronic copying machine, Figure 8 is Figure 7 ■-■
FIG. 9 is a sectional view taken along arrows 7 - 7. DESCRIPTION OF SYMBOLS 1... Original document, 2... Solid picture to be copied, 3... Copy paper, 4... Recorded picture, 5... Data input means, 10... Computer, 11... Storage means , 12... calculation determination section, 12a...
Arithmetic unit, 121]... Judgment unit, 13... Original feeding amount counting means, 14... Copy paper feeding amount counting means, 15
... Feeding control section, 16... Copying control section, 17.
...Medium heat control device, 20...Electrophotographic copying machine, 2
DESCRIPTION OF SYMBOLS 1... Document feeding device, 22... Pulse generator for document feeding, 23... Copy paper feeding device, 24... Pulse generator for copy paper picture feeding, 25... Copy recording Device,
2G'-Optical system. Tang 2t21

Claims (3)

[Claims] (1) A latent image is formed on a photoconductive drum by the light that scans the original, the latent image is developed and a toner image is formed on the photosensitive drum, and the toner image is supplied to the transfer section. When obtaining a copy image by transferring it to copy paper, recording of the copy image is started from a desired position on the copy paper by relatively controlling the timing of starting scanning the original and the timing of supplying the copy paper. Characteristic method for shifting the position of copied images in an electrophotographic copying machine (2) The dimension from the leading edge of the document in the document scanning direction to the pattern is a, and the dimension of the pattern is b, and the dimension from the leading edge of the copy paper in the copy paper supply direction to the position where the copied image is to be formed is A. When the size of the copied image is B and the copying magnification is m (=B/b), if A>m・a, the copy paper is adjusted to (A−m・a) before scanning the original. If the corresponding length is supplied, and if A<m・a, then (m・a−A
) A method for shifting a copy image position in an electrophotographic copying machine according to claim 1, wherein copy paper is delayed and fed by a length corresponding to (3) Document information consisting of the dimension a from the leading edge of the original to the pattern in the document scanning direction and the dimension b of the pattern, and the dimension A from the leading edge of the copy paper to the position where the copied image is to be formed in the copy paper supply method and its A data input means for inputting copy information consisting of a dimension B of a copy image, a storage means for storing this information, and a copy magnification m (=B/b) and a copy paper feed amount in response to this information. a calculation unit that calculates A and a determination unit that determines the magnitude of A and m・a; and a pulse signal from a pulse generator connected to the document feeding device of the electrophotographic copying machine. A first counting means for counting the amount of document feeding N, and a second counting means for counting the amount of copy paper feeding J based on a pulse signal from a pulse generator connected to the copy paper feeding device. and, based on the determination result in the determination section,
A central control unit that controls a feeding control unit that drives and controls the document feeding device and the copy paper feeding device, and a copying control unit that drives the copying recording device to record a copy image at a position shifted by A from the leading edge of the copy paper. A device for shifting the position of a copied image in an electrophotographic copying machine, comprising a computer equipped with the device and a computer equipped with the device.