JPS63125953A - Copying device - Google Patents

Abstract

PURPOSE:To improve operability by selecting simultaneously a function by a setting means which sets automatically variable magnification from a desired read area to a recording medium of desired size and a function by a supply control means which selects a recording medium of an optimum size in relation to the size of a formed image. CONSTITUTION:Magnification when detected original size and specified original size are varied automatically to form size data on forms set at paper feed stages is calculated and forms are so selected that the magnification approximates 100%. Then when both functions of automatic variable magnification and automatic form selection are selected simultaneously with soft keys SK4 and SK5, magnification for which the automatic variable magnification is specified is set automatically to 100%. When the automatic variable magnification function is selected while the automatic form selecting function is already selected, or vice versa, the function which is already set is never switched contrary to the intention of an operator by giving priority to the function which is selected later. Consequently, there is no restriction of use and the operability is high.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a copying apparatus, and more specifically, a copying apparatus having a function of changing the magnification of an image formed with respect to an original image to be read (variable magnification function). It is related to the device.

[Prior Art 1] Conventionally, some copying apparatuses of this type have a function of detecting the document size and automatically selecting the magnification and the optimum size of paper. However, the sizes of manuscripts that can be detected are mostly limited to standard formats such as 84th edition and A3 edition. Furthermore, the automatic magnification selection function and the automatic paper selection function could not be set at the same time.

[Problems to be Solved by the Invention] Therefore, in the conventional copying apparatus, operability inevitably deteriorates.

SUMMARY OF THE INVENTION In view of these problems, the present invention aims to provide a copying apparatus that is capable of detecting a document of any desired size, not just a standard size, and simultaneously achieving automatic paper selection and automatic magnification based on the detection. .

Means for Solving Problem E] In order to achieve such an object, the present invention changes the magnification of an image with respect to a reading area on a document related to reading and forms it on a recording medium according to the magnification setting. an image forming means capable of supplying recording media of a plurality of sizes to the image forming means according to selection; and a supply means capable of supplying recording media of dimensions corresponding to the size of the formed image to be selected and supplied. a supply control means for controlling the supply means; a starting means for starting the supply control means; a setting means capable of setting a magnification so that a reading area is formed on a selected recording medium with a changed magnification; resetting the magnification and the selection of the recording medium based on the set magnification and the dimensions of the selected recording medium when the setting means is making settings and the starting means is activating the supply control means; The present invention is characterized by comprising a resetting means for performing the following.

[Operations] According to the present invention, the function of the setting means to automatically set the magnification from the desired reading area to the recording medium of the desired size, and the function of setting the optimum size related to the size of the formed image. It becomes possible to simultaneously select the function of the supply control means for selecting the recording medium, and switching of both functions against the operator's will is also prevented.

[Examples] Hereinafter, examples of the present invention will be described in detail and specifically with reference to the drawings.

(1) Outline of Embodiment FIGS. 1 and 2A are a perspective view and a sectional view, respectively, showing an embodiment of the copying apparatus of the present invention.

As shown in FIG. 1, the copying apparatus according to this example is composed of a reader unit A that reads an original image, and a printer unit B that forms the read image on a recording medium such as paper. There is. The reader unit A is also provided with an operation section A-1, which will be described later with reference to FIG. 2(B).

As shown in FIG. 2(A), the original is placed with the side on which the image to be read (original surface) is formed facing downward on the original platen glass 3, and is pressed onto the glass 3 by the original cover 4. Ru. The document surface is illuminated by a fluorescent lamp 2, and the reflected light is focused onto the surface of a CCD 1 as a reading sensor via mirrors 5 and 7 and a lens 6.

Mirror 7 and mirror 5 are controlled to move in the sub-scanning direction at a relative speed of 2:1. This means that, for example, if a DC servo motor is used as the drive source, the optical systems can be moved at a constant speed by performing PLL control. The moving speed can be set to 180 mm/sec on the forward path (from left to right in the figure) during full-magnification reading, and 800 mm/sec on the backward path (from right to left) regardless of the magnification.

In addition, the maximum document size that can be processed is equivalent to A3 size,
If the resolution is 400dots/1nch, CCD
The number of constituent bits of 1 is 4678 (= (297/
25.4. ) x400) bits are required, so this example uses CCD 1 with 5000-bit elements arranged. Also, the main scanning period is 352.7μ5eC (= (
10'7180) X (25,47400)).

The image signal serially processed by the reader unit A for each bit of the CCD 1 is input to the laser scanning optical system unit 25 of the printer unit B.

This unit 25 includes a semiconductor laser unit, a collimator lens, a rotating polygon mirror (polygon mirror), and an F-θ
It consists of lenses, correction optical systems, etc. That is,
The image signal from the reader unit A is supplied to the laser unit, where it undergoes electro-optic conversion and is irradiated via a collimator lens to a polyhedral mirror that rotates at high speed.The reflected light enters the photoreceptor 8 and is scanned. .

For the photoreceptor 8, a pre-static eliminator 9. is used as a process component that enables image formation. Front static elimination lamp 10. −
Next charger 11. Secondary charger 12. Front exposure lamp 13.
Developing device 14. Paper feed cassette Is, paper feed roller 16. Paper feed guide 17, registration roller 18. Transfer charger 19. Separation roller 20. Conveyance guide 21. Fixing device 22. Tray 2
3rd class is placed. Note that the speed of the photoreceptor 8 and the conveyance system is 180 arm/sec. Further, in this example, a so-called laser beam printer is used as the printer unit B, but other printers may be used.

The copying apparatus of this example has intelligence such as image editing, and its functions include functions for changing the magnification in 1% increments within the range of 0.35 to 4.0 times, and only for specified areas. A trimming function to extract the image, a movement function to move the trimmed image to a desired position on the recording medium,
It includes a function of detecting the position coordinates of the document placed on the document platen glass 3, and the details of each of these functions will be described later.

FIG. 2(B) shows an example of the configuration of the operating section A-1.

Here, 100 is a copy start key that commands the start of copying, 102 is a copy stop key that is commanded to stop the copying operation, 101 is a reset key that returns the copy mode to the standard state, and 103 is a key from "O" to "9". This is a setting key that has a number key group, a "C" key for clearing the set number of copies, etc., and a "*" key used for inputting numerical data such as the trimming area. 108 is for setting the density from high to low. This is a density key, and the result is displayed on the display unit 112. Reference numerals 104 and 105 are keys and indicators for turning on/off the document position coordinate detection function, respectively, 111 is a copy number display unit, and 113 is a display unit for various types of keys. The error message display sections 109 and 114 are a key for turning on/off the automatic density adjustment function and its display section 110, respectively.
and 115 are keys and indicators for turning on/off the dither processing function when reading half-tone original images such as photographs, respectively; 116 is a key for selecting the paper feed stage and automatic paper selection function; The display 117 shows the paper feed stage,
The paper size is displayed on the display 118.

Reference numeral 122 denotes an operation display section, which has a preset key for presetting and calling up a copy mode and its display section. 123 is a liquid crystal display section composed of, for example, a 5x7 dot matrix of 32 digits, and 124 is a display section 1.
This is a soft key for selecting a desired mode from the copy modes displayed at 23.

125 and 126 are magnifications M in the sub-scanning direction, respectively.
This is a display section that displays Y and the magnification MX in the main scanning direction in %. Reference numeral 127 is a constant magnification/variable magnification switching key, and each time it is pressed, both the main scanning direction magnification MX and the sub scanning direction magnification MY are set to the same magnification (100%) mode and auto magnification (MX=M
Y) mode is repeatedly set alternately. key 128
and 129 simultaneously sets the magnifications MX and MY to 1
Increase or decrease by %.

13σ is a switching key used to switch between the 100% mode and auto variable magnification mode for only the magnification MY in the sub-scanning direction, and 131 and 132 are command keys for increasing or decreasing only the magnification MY by 1%, respectively.

In addition, 133 is a switching key used for switching between 100% mode with only main scanning direction magnification MX and auto variable magnification mode;
Reference numerals 34 and 135 are command keys for increasing or decreasing only the magnification MX by 1%, respectively.

The variable magnification functions that can be set using these nine keys 127-129, 130-132 and 133-135 include:
There are seven types as will be described later with reference to FIG.

(2) Leader part FIG. 3 shows an example of the system configuration of beamer section A.

Here, in addition to the above-mentioned cco t, the CCD reading unit 301 includes a clock driver of CGD I, Cfl:D 1
An amplifier for the signal from the oscillator, an A/D converter for A/D converting the signal, and the like are provided. This CCD reading section 301
Image data converted into a 6-bit digital signal is outputted from the shading correction section 302 and inputted to the shading correction section 302.

The shading correction unit 302 detects the amount of shading of the optical system such as a light source and a lens, and corrects the image data accordingly, and then stores the detected amount in the shift memory unit 30.
3 and temporarily accumulate it. Shift memory section 30
3 is provided with a shift memory for two lines, and when the image data of the Nth line is being written to the first shift memory, the image data of the N-1th line is read from the second shift memory. . Shift memory section 303
In addition, there are provided a write address counter for writing image data into each shift memory, a read address counter for reading image data, and an address selector circuit for switching address signals from these two counters. The details will be explained in detail with reference to FIG.

304 is a magnification/movement processing unit that variably sets the clock that defines the write cycle of the image signal to the shift memory, the clock that defines the read cycle from the shift memory, and the read timing. Magnification and movement are controlled. The details will also be described later.

The image signal output from the shift memory section 303 is input to the density processing section 305, where it is subjected to binarization processing or dither processing to become a binary signal, which is then sent to the trimming processing section 3.
06. The trimming processing unit 306 forcibly sets an arbitrary section of image data of one line in the main scanning direction to “0”.
”, “1” to enable editing of the image. The details will be described later. The binary signal output from the density processing unit 305 is also input to the document position detection unit 307.

Here, the position coordinates of the original on the original table glass 3 are detected using a binary signal as will be described later.

308 is the CPU section, which is shown in Figures 14 and 15 (^
) to (D), a CPt1 that controls each part according to the processing procedures described later, and a ROM that stores the processing procedures, etc.
.

It consists of working RAM, timer circuit, 110 interface, etc. The 010 section 308 further includes an operation section A-1.
It controls the reader unit according to the settings from the operator, and also controls the printer unit B through serial communication.

311 is a driver for a DC servo motor M as a drive source for moving the optical system, and 020 section 308 presets speed data according to the magnification. 312 is a driver for the fluorescent lamp 2, which operates the fluorescent lamp 2 under the control of the 020 unit 308.
Turn on/off and control the amount of light when lit. 313 and 314 are position sensors arranged at appropriate positions to notify the 010 unit 308 of the position of the optical system.

Reader unit A with such a configuration is printer unit B.
is connected via connector JRI and connector JPI on the printer unit B side. Control signals necessary for image data communication and serial communication are exchanged between reader unit A and printer unit B, details of which will be described later with reference to FIGS. 10 and 11. Note that the horizontal synchronization signal BD from printer unit B is sent to connector JR1.
and is input to the clock generator 309. The clock generator 309 generates a COD signal transfer lock, a read/write clock for the shift memory section 303, etc. in synchronization with the horizontal synchronization signal BD.

(3) Original Position Detection Section FIG. 4 shows an example of the configuration of the original position detection section 307. 35
1 is a main scanning counter for indicating the scanning position in one main scanning line, and it is set to the maximum value of the horizontal synchronization signal 1 (SYNC in the main scanning direction or X direction) and is countered every time the image data clock CLK is input manually. It can be a down counter that counts down. 352 is a sub-scanning counter for representing the scanning position in the sub-scanning direction, which is reset to "0" at the rising edge of the vertical synchronizing signal VSYNC (image leading edge signal), and can be an up counter that counts up with the H5YNC signal. can.

2 during preliminary scanning (pre-scanning) performed to determine the reading level and detect the document position prior to reading the document image.
The converted image data VIDEO is transferred to the shift register 36
1 in 8-bit units, for example. When this 8-bit input is completed, the gate circuit 362 determines whether or not all of the 8-bit data is a white image, and if the determination is affirmative, it outputs "B" to the signal line 363. In other words, - After scanning starts, when data in which all 8 bits are white appears for the first time, flip-flop (F/F) 3
64 is set. In addition, this F/F364 is VSY
It is reset in advance by the NC signal, and after that, the V of the clothes
The set state remains until the SYNC signal is supplied.

When the F/F364 is set, the '
The value of the main scanning counter 351 at that time is loaded into the F/F 305. Let this be the X1 coordinate value. Further, the value of the sub-scanning counter 350 at that time is stored in the latch 306, and this is set as the Y1 coordinate value. Therefore, one vertex P + (X+, Y+) of the original image is found.

Further, each time "1" is output to the signal line 363, the value from the main scanning counter 351 is loaded into the latch 367. 8
When the value from the main scan counter when the data with the white bit first appears is loaded into latch 307, launch 370 (which is set to the maximum value in the X direction at the time the VSYNC signal is applied) is loaded into latch 307. ) and is compared in size by a comparator 369. If the data in latch 367 is smaller, the data in latch 367 is smaller than the data in latch 367.
Loaded to 0. Also at this time, the sub-scanning counter 352
The value of is loaded into latch 371. This operation is as follows
The bits are processed before entering shift register 361.

In this way, if the data of the latch 367 and the data of the latch 370 are compared for the entire image area, the latch 370
The minimum value of the document area in the X direction remains, and the coordinates of this position in the Y direction remain in the latch 371. Since the main scanning counter 351 is a down counter, the coordinate corresponding to the minimum value in the X direction represents the farthest coordinate from the scanning start origin S in the main scanning direction. This is P3 (
X3. Y3).

372 is an F/F that is set when 8-bit white first appears for each main scanning line, and is a horizontal synchronizing signal) I
It is reset by SYNC, set with the first 8-bit white data, and maintains this state until the next signal HSYNC is supplied. At the time when this F/F 372 is set, the value of the main scanning counter corresponding to the position of the first white signal appearing in one line is set in the latch 373. Then, the data in the latch 375 and the comparator 376 compare the data. The minimum value "O" in the X direction is set in the latch 375 at the time the signal VSYNC is generated.

If the data in latch 375 is less than or equal to the data in latch 373, signal 377 becomes active and the data in latch 373 is transferred to latch 375.
loaded into. This operation is performed within the supply cycle of signal H5YNC. When the above comparison operation is performed for the entire image area, the maximum value of the document coordinates in the X direction, that is, the X coordinate of the white signal of the point closest to the scanning start point in the main scanning direction remains in the latch 375. Let this be x2. Also, when the signal 377 is output, the sub-scanning counter 35
A value of 2 is loaded into latch 378. This is designated as Y2, and the P 2 (X2.Y2) coordinate is obtained.

Each time 8-bit white appears in the entire image area, the latches 379 and 320 are loaded with the main scanning counter value and the sub-scanning counter value at that time, respectively.

Therefore, when the document pre-scanning is completed, the count value at the time when 8-bit white appears last remains on the counter. This is called P4 (X4.Y4).

The above eight latches (368, 371, 320, 378,
The data lines 31i5, 370°375.379) are connected to the pass lines BUS of the CPU units 3-8 shown in the third diagram, and the 610 unit 308 reads the data held in these latches at the end of the previous scan. .

(4) Shift Memory Section FIG. 5 shows a configuration example of the shift memory section 303 in FIG. 3. As mentioned above, in this example, two shift memories are provided so that writing and reading are performed alternately to improve processing efficiency, but in Fig. 5, one shift memory is used for simplicity. Only the system related to the shift memory (indicated by reference numeral 907) is shown.

The write address counter 904 is a shift memory 907.
The read address counter 905 is an address counter used when writing data to the shift memory 907, and a read address counter 905 is an address counter used when reading data from the shift memory 907. The address selector 906 receives the command from the 010 unit 308 via the I10 port 901 and selects the write address counter 90.
4 and the address signal of the read address counter 905 to shift memory 907.
It is for addressing.

I10 registers 902 and 903 are registers for the CPIJ unit 308 to give preset values to the write address counter 904 and read address counter 905, respectively.

In this example, both the write address counter 904 and the read address counter 905 are configured as down counters, and a WST signal and an R5T signal for instructing the start of counting operation are input to each, and the shift memory 90
The write clock WCLK to the shift memory 7 and the read clock RCLK from the shift memory are manually input.

915 and 916 are exclusive OR gates for determining the image area, and OF is a signal that controls them. When the value is "1", it masks the area within the frame determined by the ST counter 912 and the EN counter 913, and masks the area outside the frame. is set as the output image, and on the other hand, when it is "0", the inside of the frame is set as the output image and the outside of the frame is masked.

Reference numeral 910 denotes an AND gate that controls the output of image data that is output from the shift memory 907 and becomes a binary signal after passing through the density processing section 908. 917 is an AND gate that determines whether to output the above-mentioned mask part as white or black, and BB is a signal that controls it; when its value is "1", it is black, and when it is "0", it is white. Output.

911 is an OR gate that outputs the image output output from gates 910 and 917 as an image signal VIDEO, 909 is an exclusive OR gate that controls black and white inversion of image data, and IN is a signal that controls gate 909, and is set to "1".
When it is "0", the original image is output, and when it is "0", the inverted image is output. In addition, each signal OF, BB, IN is sent to the CPU section 3.
08 is output according to the mode specified by the operator.

The ST counter 912 and the EN counter 913 are a start bit counter and an end bit counter, respectively, for outputting an image only to a predetermined area. Preset data.

F/F 914 is an R-3 type flip-flop that is set when the ST counter 912 counts up and is reset when the EN counter 913 counts up.

FIG. 6 shows an example of the operation timing of each part shown in FIG.

For example, when the OF signal is "B" and the ST counter '912 counts up, the Q output of the F/F 914 becomes 1.
The output of the gate 915 becomes “0” and the EN counter 91
There is no output from gate 910 until it counts up to 3, and it is masked. On the other hand, since the output of the gate 916 is "1" during that time, when the BB signal is "Bi", the output of the gate 917 is "1", and the gate 911 outputs "Bi", resulting in a black mask. Conversely, when it is 0F-1, 88-0, white masking is performed.

Also, when 0F-0 is set, the outputs of gates 915 and 916 become "1" and "0" respectively during that time, so when BB=1, the area outside the trimming range is black, and BB=O
When , the area outside the trimming range becomes white.

(5) Aspects of variable magnification Next, the mode of zooming will be explained.

Variation of magnification in the sub-scanning direction is performed by varying the scanning speed of the optical system. The CPU unit 308 uses the operation unit A-1 to calculate the target rotational speed of the DC servo motor M from the magnification specified by the operator in A, calculates the PLL frequency corresponding to the speed, and operates the motor shown in the third diagram. The driver 311 is preset before scanning. That is, if the conveyance speed of the recording medium by the printer section B is constant, for example, 180 i
s/sac - When enlarging an image twice, set the rotational speed of the motor M so that a scanning speed of 90II1m/sec is obtained as a percentage of the scanning speed of 180IIIl/SeC at the same magnification, and reduce it to %. Time is twice the speed 360 m
The speed of motor M is determined so as to obtain m/sec.

Next, magnification change in the main scanning direction will be explained using FIGS. 7(^) to (D).

The main scanning direction magnification is a CCD that outputs at a constant frequency.
This is done by sampling the serial signal after A/D conversion from the reading unit 301 at a clock rate according to the magnification as follows.

At the same magnification, as shown in FIG. 7(A), the CCD reading section 3
Write to the shift memory unit 303 using the write clock WCL that is equal to the transfer lock CLK from 01, and
As shown in FIG. 3B, data is read from the shift memory section 303 using a read clock RCLK that is equal to the output clock VCL to the printer section B.

On the other hand, when reducing the size to a station, for example, the shift memory section 30
Transfer the write clock WCLK to the lock CL as shown in Figure 3 (C) and write it to the lock CL at the station, sample 1 bit at a time for the 2 bits of information in the original image,
% reduction is achieved by reading with the same read clock RCL as the output clock vCL, as shown in FIG.

For example, when enlarging to 2 times, when writing to the shift memory section 303, the data is written as shown in FIG. If the output clock VCLK to the printer section B is read out at the station's clock rate, one bit of the same signal will be added to each bit of document information, making it possible to achieve double enlargement.

(6) Image movement mode The image movement mode will be explained using FIGS. 8 and 9.

Regarding the sub-scanning direction, as shown in FIG.
This is achieved by changing the output timing of YNC.

When the optical system reaches the position ■ with respect to the document M,
When the image signal VIDEO is output together with the signal VSYNC, a recording output P1 that does not move is obtained, and when the optical system reaches the position (■), the image signal VIDEO is output together with the signal VSYNC.
When O is output, a recorded output P2 that is moved backward is obtained. Also, when the optical system reaches the position of ■, the signal VS
When the image signal VI[lEO is outputted to YN, a recording output P3 that moves forward is obtained.

Regarding image movement in the main scanning direction, as shown in FIG. 9(A), the down count start address given to the write address counter 904 and the read address counter 905 via the I10 registers 902 and 903 shown in FIG. This is done by changing to .

For example, the write start address W to the shift memory section 303
Assuming that the readout start address for ADH is R^DRI, as shown in FIG. 9(B), image data x0 corresponding to address WADR is placed on the right side with respect to the output VIDEOENABLE corresponding to the width of the image in the main scanning direction. You can see that it is moving in the direction. Also, set the read start address to R.
Assuming ADR2, data X corresponding to shift memory address O is VIDEOE as shown in (C) of the same figure.
NABLEl: On the other hand, it can be seen that the ball moves to the left and tees. Note that the effective image section signal in FIG. 9 means the ST counter 912. in FIG. EN counter 913,
This is a trimming section signal consisting of F/F 914, gate 915, 916, 917°, 910, 911, and for invalid images outside the section from address 0 to WADR in the shift memory section 303 of FIG. 9(A). This is necessary for setting a white traffic light.

(7) Interface Signals The timing of interface signals exchanged between the reader section A and the printer section B will be explained using FIG. 1O and FIG. 11.

The BEAM DETECT signal BD is for synchronizing with the rotation of the polygon scanner that scans and drives the polygon mirror disposed in the laser scanning optical system 25 of the printer section B when the reader section A and the printer B are connected. It corresponds to the leading edge signal of each scanning line.

VIDEO is an image signal, each having a pulse width of 58 ns per pixel per line, and 4678 signals are output. The image signal VIDEO is synchronized with the signal BD when connected to the printer section B, and when transmitted to other units, an internal pseudo-horizontal synchronization signal (hereinafter signal 1 (SYNC) is used).
) is output in synchronization with the

VIDEOENABLE is a section signal indicating a section in which 4678 pieces of image data are output, and is output in synchronization with signal BD or signal H5YNC.

VSYNC is a signal indicating the section of the image in the sub-scanning direction.

The PRINT REQUEST signal is a signal indicating that paper feeding is possible in the printer section B, and the reader section A responds to this by outputting a paper feeding command using the PRINT signal.
After a time TI that takes into account the magnification, trimming area, and movement amount corresponding to the copy mode set by the operator, the signal VSYNC is output.
At the same time, an image signal VIDEO is output.

OHP and VTOP are human signals from sensors 313 and 314 (see FIG. 3) that indicate the position of the optical system of reader section A, respectively. BAC and FORWAR
D is a backward and forward control signal given to the optical system drive motor driver 311 from the CPU section 308 shown in the third figure.

In Figure 11, S, DATA, S, CL, C, B
This is a signal line for communication between USY and 9-eva beamer section A and printer section B. S, DATA
, S, and CLK are 8-bit serial data and clock, respectively, and both are bidirectional lines. ff is output when the reader section A outputs data and a clock, and S and BUSY are output when the printer section B outputs data and a clock.

Examples of signals communicated serially include a copy start command and a copy stop command from the data section A to the printer section B, as shown in the timing chart of FIG. 1O.

(8) Variable magnification function There are seven types of variable magnification functions provided by the copying apparatus according to this example, as shown in the following table.

In the table, MX is the magnification in the main scanning direction, MY is the magnification in the sub-scanning direction, DX and DY are the original size for reading, Px and PY are the paper size of the recording medium on which image data is formed, and the subscript X is the main scanning direction. , the subscript Y means the sub-scanning direction. Further, the document size is the size of the entire document or the area designated by the operator.

(Margin below) Magnification function operation, 1 and tooth, 4 and key 12 in Figure 2 (C)
7 is selected repeatedly. Variable magnification function, 2 is key 1
28 and 129. When the variable magnification function is activated, 3, the sub-scanning magnification MY is set by keys 131 and 132.
4 and 135 set the main scanning magnification MX. The variable magnification function (5) can be set by using the key 130 to select MY to perform automatic magnification, and by pressing the key 133 to select MX to automatic magnification. Variable magnification function, 6 is key 130
Set MY to automatic magnification, and press keys 134 and 135.
The setting is made by selecting an arbitrary magnification of MX.

Conversely, the variable magnification function 7 is set by setting MX to automatic magnification using the key 133 and selecting an arbitrary magnification for MY using the keys 131 and 132.

FIG. 12 shows an example of the contents displayed on the display sections 125 and 126 when these seven functions are selected. All numerical values are examples showing percentages. Also, "A" means auto, and r 7 J and "-" displayed to the left of 'AJ are
Each indicates that the main scanning direction and the sub-scanning direction are independent.

The manner of calculating the magnification of automatic magnification will be explained. Basically, the main scanning magnification MX is given by PX/DX, which is the length px of the paper in the main scanning direction divided by the length DX of the document in the main scanning direction, and the sub-scanning magnification MY is also given by PY/DY. MX and MY obtained in this way are not necessarily equal. Therefore, the variable magnification function operates, 5~No,
For MX and MY in 7, the values can be used as they are, but with the variable magnification function, MX and MY in 4
must be equal, so in this case P
Either one of X/D X and P Y/D Y, for example the smaller one, is used as MX and MY. Further, in this example, the copying magnification that can be selected is between 35% and 400%, and when the calculation result deviates from this condition, it is rounded to 35% or 400%.

The functions of variable magnification function 6 and function 7 are added for the first time in the copying machine according to this example. In other words, when referring to automatic magnification in conventional devices, it refers to automatically setting the magnification in both the main scanning direction and the sub-scanning direction, and therefore it is not possible for the operator to set either one to the arbitrary magnification desired by the operator. However, in this example, by making it possible to set any one of the magnifications to an arbitrary magnification, the scope of application of the variable magnification function is greatly expanded.

FIG. 13 shows specific examples of the above seven variable magnification functions.

In the figure, the left side of the arrow indicates the original, and the shaded area on the right side is the image after scaling.

Further, the auto-magnification function is illustrated together with the paper size. Magnification is shown for both main and sub-scanning directions, “A”
stands for auto, and the number in parentheses is the calculated auto magnification ratio.

(9) Paper Selection Function As another automated function related to document size, an automatic paper selection function is added in this example. This function selects the optimal paper to obtain an image output with the size of the detected original size or specified area size multiplied by the set magnification. It is necessary to be aware of the size and magnification. Previously, the auto magnification function and auto paper selection function mentioned above could not be used together, so if the auto magnification function was selected when the auto paper selection function was already selected, or vice versa. In such cases, a warning message is displayed to notify the operator that both functions cannot be used together, or the function that was already set is operated in favor of the function selected later. The switch had to be made forcibly, regardless of the person's intention. Therefore, there are many restrictions on the operator's use, and the mode may be switched arbitrarily, resulting in low operability.

Therefore, in this example, the four automatic magnification functions described above (
No. 4 to No. 7) can be used in combination with the automatic paper selection function.

The basic idea of determining the magnification and selecting paper when using the auto magnification function and auto paper selection function together is to first match the detected document size or specified area size to each of the paper sizes set in the paper feed tray. The method is to calculate the magnification when automatically changing the magnification for the image, and select a paper whose magnification is closer to 100%.

If this is followed, it is reasonable to be able to perform full-size copying, which is usually the most frequent process when using a copying machine, without any contradiction, and it will not confuse the operator by giving operational restrictions or unnecessary messages. .

It is also conceivable to automatically set the magnification ratio to 100% when the automatic magnification change function and the automatic paper selection function are selected at the same time.

(lO) Copy Sequence FIG. 14 shows an example of the copy processing procedure (copy sequence) according to this example. This procedure is stored in the ROM of the CPU unit 308 in FIG. 3 and executed by the CPU.

First, the operator uses the key 116 to select either the upper cassette or a mode in which the apparatus automatically selects the paper feed stage as the paper feed stage (sp501).

Next, the operator selects any one of the seven types of magnification functions described above using keys 127 to 129, 130 N132 and 133 to 135, and specifies the desired magnification as necessary (5p502 ).

The operator selects either the entire document or a specific area as the reading area by following the steps shown in Figures 16 (A) to (G). In the latter case, the operator specifies the desired area, and the corresponding Set the area coordinates to areas GXO, GYO, GXI, and GYI provided on the RAM in the CPU unit 308 (s
p503). Also, set other functions as necessary (
sp504).

When the start key 100 is pressed (sp505), the copy operation is started. Here, if it is determined that the document recognition function is selected (sp506), a preliminary scan (pre-scan) is performed to detect the document position and size described above (sp507), and the area DXO provided on the RAM is scanned. , DYO, DXI, 'DY1: Set the document position coordinates (sp508). On the other hand, when it is determined that the document recognition function is not selected (sp506), various values corresponding to the maximum reading area equivalent to A3 size are set as the document (sp509).

When it is determined in step 5p503 that a specific area is specified (sp510), the recognized origins DXO and DYO of the original are set to areas GXO and GXI.

Add to GYO, GYI and re-load the result to areas DXO, DXI, DYO, DYI on RAM (
sp511). At this point, DXO, DXl, DYO regardless of whether or not they are recognized and whether or not a specific area is specified.

The reading area coordinates will be set in DYI.

Next item, DX=DX1-DXO and DY=DY1-
From DYO, the size of the original, that is, the reading area DX and D
Calculate Y and set it in the area on RAM (sp51
2).

Next, according to the specified mode, calculate the magnification in the case of automatic magnification, and select the paper feed stage in the case of automatic paper selection (sp5
13). The details will be described later with reference to FIGS. 16(A) to 16(D).

Next, the paper feed stage selected in 5p513 is transferred to printer section B.
(sp514), and set the scan speed of the optical system in the sub-scanning direction, the write clock to the shift memory section 303, and the read clock from the shift memory section 303 according to the magnification calculated in 5p513 (sp515). ). After that, the image reading scan and printing are repeated until the copy sequence for the set number of copies is completed, and then the operation ends (sp518, 5p51
7).

The details of the magnification calculation and paper selection process (sp513) will be explained using FIGS. 16(A) to 16(D).

First, check 5p801 whether or not automatic paper selection is selected. )
, if the judgment is negative, the paper sizes already selected by the operator are stored in the areas PX and P provided in the RAM in the 010 section 308.
To Y (?tishuku 5p602) 1. : px and P
Y and the already set reading area sizes DX and DY, depending on the selected variable magnification (sp6
03), calculate the magnification as follows.

When the variable magnification function is No. 1-No. 3, the main scanning magnification M
Since both X and sub-scanning magnification MY are known, this procedure ends without performing any calculations.

When the function is 4, that is, automatic magnification, M
= M Y = max(0,35,min(PX/
OX, PY/ICY.

4.0)) Calculate MX and MY and set them in the area on RAM. This is to calculate the magnification for reducing/expanding the reading area to the entire surface of the paper separately for main scanning and sub-scanning, and then setting the smaller one as the magnification. 400% or less (sp604).

In other words, when the automatic magnification of the functional tooth 5 is performed, unlike the automatic magnification of the functional tooth 4, the main scanning and sub-scanning magnifications may be different, so that M X = w.
ax(0,35,win(PX/DX,4.0),M
Y-Ifiax(0,35,ff1in(PY/DY
, 4.0)) to obtain these (sp605).

For the functional tooth 6, since MX is known, only MY can be found, and similarly for the functional tooth 7, since MY is known, only MX can be found by the same calculation as the vertical and horizontal auto magnification.
sp606,5p607).

When automatic paper selection is determined in 5p601, first set the paper size of the upper cassette in the area PXU on the RAM.
PYU, and the paper size of the lower cassette to PXL, P.
Set to YL (sp608).

Next, check the variable power function number (5p609) and proceed to the process shown in FIG. 6 (B) or (C) depending on the function. Note that in FIG. 2B, i is a control variable for selecting a paper cassette.

For functional teeth 1 and 2.3, both MX and MY are known, so the size obtained by multiplying the reading area sizes DX and DY by the magnifications MX and MY, respectively, is larger than the paper in the upper cassette. It is determined whether the paper is small in the scanning direction (5p611), and the lower stage is also determined (sp813), and as a result, it is determined that neither the paper in the upper cassette nor the paper in the lower cassette can fit (5p611).
Step p625) notifies the operator that there is no suitable paper, returns to step 2 in FIG. 15, and ends the procedure without performing the copying operation (sp639).

If the image is placed on only one of the paper in the upper cassette or the lower cassette (sp625), select that paper feed stage and set the paper size to areas DX and D on the RAM.
Set to Y (sp637, 5p638).

When there are images on both the paper in the upper cassette and the paper in the lower cassette (when i = 3), the size of the paper in the upper cassette and the paper in the lower cassette are compared, and one side is scanned in both main and sub-scanning. If the paper is smaller than the other, select the smaller paper, and if they are exactly the same, select the upper paper in this example (s
p626-5p635).

Further, when the magnitude relationship between the main scanning and sub-scanning is different, the one with the smaller area is selected (sp636).

5P609 has variable magnification function No, 6 or No, 7
When it is determined that one of MX and MY is known, the paper size and image size of the upper and lower rows should be compared only in the direction where the magnification is known.5p616,5p
818, 5p621, 5pli23) Specify the paper (sp625 and below). The procedure is function No., l~No.
, 3. However, since MY is unknown for function No. 6, and MX is unknown for function No. 7, after determining the paper size (sp637, 5p638), the magnification is calculated based on the paper size and the reading size (sp641, 6).
42).

Also, in 5p809, the variable magnification function is No, 4 or No.
, 5, first calculate the magnification ratio for changing the magnification of the reading area to cover the entire surface of the paper for both the upper and lower rows (5p643, 5p644.5 in Figure 16 (C)).
p651.5p652). As a result, the magnifications MXU and MYU for covering the entire surface of the upper row of paper, and the magnification ratios MXL and MYL for covering the entire surface of the lower row of paper are stored in the RAM in the CPU unit 308.
(2) Set it in the designated area.

In Rye, these MXU, MYU, M'XL.

An appropriate paper size is determined from MYL based on appropriate standards. In this example, the norm is α; (MX-1,
0) 2+ (MY-1,0)', that is, select the one with the smaller sum of squares of the error from the same size in length 5p645
．． 5p646), and when these are equal, β = (MX・MY
−1,0)”, i.e. 2 of the error from the same magnification in area
Select the smaller power (sp64'7゜5p648
).

Set the resulting paper sizes PX, PY and their corresponding magnifications MX, MY in the RAM area (
sp649, 5p6so), the magnification calculation and paper selection process are completed.

Furthermore, in connection with this magnification calculation and paper selection process,
As shown in FIG. 16(D), when both the auto magnification and auto paper selection functions are selected at the same time, the process for forcibly setting the specified magnification of auto magnification to 100% (sp653 to p658) is performed. ) is also reasonable.

(11) Specifying the reading area FIGS. 16(A) to 16(G) show how to specify a specific area as the reading area using the liquid crystal display 123 and soft keys 124 (see FIG. 2(B)). Indicates the operating procedure.

When the power is turned on, the entire document is automatically selected as the reading area as shown in (A) in the figure. Here “ETC
Pressing the soft keys 5 and 6 corresponding to `` allows selection of other functions, such as the movement function.SKI
, SK2. When one of the soft keys 3 is pressed in S, a display as shown in (B) in the figure appears, requesting the operator to specify the reading area.

When left in this state for a predetermined period of time, a display as shown in (C) in the figure appears, prompting the user to select either the entire document or a specific area to be read. If the operator presses the SKI or SK2 soft key, the display returns to the one shown in (A) in the figure.
On the other hand, if you press the S to 4 or S to 5 soft key (
[1] will be displayed.

In a display like (D) in the figure, a specific area is selected using the numeric keypad 103 in each of the main scanning direction (x) and the sub-scanning direction (y). 1. It is possible to input at QL level. In this state, initially the soft key SKI
The 3-tree cursor corresponding to is blinking, and the operator presses, for example, "1" and 'O' from the numeric keypad.

If you input “O” one after another and then press the “*” key,
The display changes to the one shown in (E) in the figure, and the entered '100''
is set, and then the cursor corresponding to the SK2 soft key blinks. If you continue to input the area in the same way, the display will become as shown in (F) in the figure, and when all four coordinates have been input, rOKJ will be displayed. When the 5 soft key S is pressed here, the setting of a specific reading area is completed, and the display shown by (G) in the figure is displayed, and the specified area is displayed.

In this state, for example, 2. SK3. 4 to S. When any of the soft keys of SK5 is pressed, the display as shown in (B) in the figure is displayed again.

In this manual example, 5p5 in the copy sequence in Figure 15
In 03, GXO=100, GXI=200
.

GYO=50. GY1 = 300.

The reading area will be explained using FIGS. 17(^) to (C).

FIG. 17(A) shows a document M placed on the document table glass 3.
As a result of recognition by pre-scanning, its position is
The coordinates of the point closest and farthest from the original reference point are PO (DXO, DYO) and Pi (DXI,
DYI). Here, when the entire document is to be read according to the settings shown in FIG. 16, the DXO and DXI shown in FIG. 17 (^) are used.

DYO and DYI are read areas.

On the other hand, a specific area GXO is performed according to the procedure shown in FIG.

If GXI, GYO, GYI are set, Niha, 17th
As shown in Figure 17 (B), the area coordinates are relative to the original, so the reading area on the platen glass 3 that should be finally set is recognized as a specific area as shown in Figure 17 (C). The origin coordinates of the original document are offset.

According to the embodiments described above, when the automatic magnification change function and the free paper selection function are selected at the same time, both the magnification and the paper are appropriately selected, so that a copying apparatus with high operability can be provided.

Further, it was possible to provide a function of automatically changing the magnification of one of the main scanning direction and the sub-scanning direction at the operator's desired magnification, and the other direction.

[Effects of the Invention] As described above, according to the present invention, it is possible to detect the size of a document to be read and to perform automatic paper selection and automatic magnification based on the detection, and therefore the operation as a copying device is improved. I was able to significantly improve my sexuality.

[Brief explanation of the drawing]

1, 2(A) and 2(B) are respectively a perspective view showing an embodiment of the copying apparatus of the present invention, a sectional view thereof, a plan view showing an example of the configuration of the operating section, and FIG. is a block diagram showing a configuration example of the reader unit A in FIG. 1, FIG. 4 is a circuit diagram showing a detailed configuration example of the document position detection section in FIG. 3, and FIG. 5 is a shift memory section in FIG. 3. 6 is a timing chart for explaining the operation timing of each part shown in FIG. 5. FIGS. 7(A) to (D) are for explaining magnification in the sub-scanning direction. Figures 8 and 9 (A) to (C) are explanatory diagrams for explaining the mode of image movement, and Figures 10 and 11 show the relationship between the beam section A and the printer section B. 12 is an explanatory diagram showing an example of correspondence between the variable magnification function and display contents according to this example, and FIG. 13 is a specific example of the variable magnification function according to this example. FIG. 14 is a flowchart showing an example of the copy processing procedure according to the present example, and FIGS. 15 (A) to (D) are detailed steps of magnification calculation and paper selection processing in the processing procedure shown in FIG. 14. A flowchart showing an example, Figures 16 (A) to (G) are explanatory diagrams for explaining the setting operation of the reading area of the original image, and Figures 17 (^) to (C) are the reading areas on the original image. It is an explanatory diagram for explaining. A...Reader section, A-1...Operation section, B...Printer section, M...Manuscript, 1...CCD. 2...Fluorescent lamp, 3...Original table glass, 5.7...Mirror, 6...Lens, 15...Paper feed cassette, 25...Laser scanning optical system unit, 100...・Copy start key, 102...Copy stop key, 103...Setting key, 104.108, 109.122...Key, 105.
111, 112, 114, 118... Indicator, 116
... Paper selection key, 117 ... Paper feed film display, 118 ... Paper size display, 123 ... Liquid crystal display section, 124 ... Soft key, 125 ... Sub-scanning direction magnification display Section, 126...Main scanning direction magnification display section, 127-129, 130-132.133-135...
- Magnification change function key, 301... CCD reading section, 303... Shift memory section, 304... Magnification/movement processing section, 306... Trimming processing section, 307... Original position detection section, 308... CPU section, 311... Motor driver, 313.314... Sensor. -→Button 1t15 direction Figure 8

Claims (1)

[Scope of Claims] 1) Image forming means for forming an image on a recording medium by changing the magnification of an image with respect to a reading area on a document related to reading according to a magnification setting; a supply means capable of supplying a recording medium to the image forming means; a supply control means controlling the supply means so that a recording medium of a size corresponding to the size of the formed image is selected and supplied; activating means for activating the control means; setting means capable of setting the magnification so that the reading area is formed on the selected recording medium with a changed magnification; and setting by the setting means and by the activating means. resetting means for resetting the magnification and the selection of the recording medium based on the set magnification and the dimensions of the selected recording medium when the supply control means is activated; A copying device characterized by comprising: 2) The copying apparatus according to claim 1, wherein the resetting means selects a recording medium from which an image with a magnification close to 100% can be obtained. 3) The copying apparatus according to claim 1, wherein the resetting means resets the magnification to 100%.