JPS60239724A - Copying device - Google Patents

Abstract

PURPOSE:To improve the quality of copies by detecting the position of an original placed on an original platen and driving automatically an original moving device to move the original to a correct position if the position is not correct. CONSTITUTION:The surface of an original pressing plate 133 in the side facing an original platen 132 is made black, and the reflected optical image from an original 131 is focused through a lens 138 by a CCD sensor 140, and the variable density of the picture is read, and the output is amplified by an amplifier 141 and is converted to a digital value by an A/D converter 142. This digital value is compared with a standard value and is corrected by a correcting circuit 143, and the picture is bindarized to white or black by a binarizing circuit 144. When the original 131 is placed on the original platen 132, thereflected optical image is read along the Y axis by picture elements of the CCD sensor 140, and coordinates of the position of the first change from black to white and the position of the last change from white to black are obtained for every line in the Y-axis direction by scanning in the X-axis direction. A CPU performs operations on a basis of position detection signals, and a turning angle signal ST, a signal SX of the extent of movement in the X axis direction, a signal SY of the extent of movement in the Y axis direction, and home position detection singals SHX and SHY for correction are supplied to a controller 230.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a copying apparatus, and particularly to a device for detecting the position of a document placed on a document table and covered by a document pressure plate;
The present invention relates to a copying apparatus that has a device that can move the position of the document, and a control device that drives the document moving device and automatically corrects the document to the correct position. [Prior Art] Fig. 1 shows an example of a copying apparatus capable of copying onto ordinary paper using a photosensitive drum, in which 1 is a seamless photosensitive member whose surface is made of a photoconductive material, It is a photosensitive drum that can be rotated. During one rotation of the photosensitive drum 1, the photosensitive drum 1 is first neutralized by the exposure lamp 2, then corona charged by the primary charger 3, and when it rotates to position 4, it is image exposed and electrostatically charged. A latent image is formed. After that, in the developing device 5, either the developing roller 5A or 5B is selected according to an instruction to visually develop the toner, and then the cassette 8A or 5B is visually developed.
The transfer charger 8 transfers the image onto the copy sheet 312 that is fed from the printer B onto the drum 1 at appropriate timing via the registration rollers 7. In addition, 9A and 9B
is a paper feed roller that feeds paper 312 from cassettes GA and 6B. After the transfer, the copy paper 312 is separated from the drum 1 by the separation charger 10, guided by the conveyor belt 11 to the fixing roller 12, where it is thermally fixed by pressure heating.
The sheet is discharged onto a tray 15 via rollers 13 and further through discharge rollers 14. On the other hand, after the transfer paper is separated from the photosensitive drum 1 by the separation charger 10, the photosensitive drum 1 is cleaned with a toner brush or the like in the toner collector 18, and the charge is removed by the pre-exposure rub 2 again, and the next copy is made. Reference numeral 17 denotes a flapper interposed between the roller 13 and the paper ejection roller 14. In the case of normal transfer, the copy paper 312 is moved toward the tray 15 by placing the flapper 17 in the position shown by the dotted line. However, in the case of multiple transfer, the flapper 17 is moved to the position shown by the solid line, and the paper is temporarily stored in the multiple transfer tray 18. From there, the paper is guided to the registration roller rough by the paper feed roller 18, and then the paper is guided to the registration roller rough again by the paper feed roller 18. The image is guided to a transfer position on the drum 1, that is, between it and the transfer charger 8, and the transfer and fixing steps are repeated. In addition, 2
0 is a "blank exposure device" to prevent unnecessary toner from adhering to the drum 1, and has a subdivided configuration. The irradiation device for 1 will be explained. 31 is an original for copying placed on a glass original table 32, and 33 is an original pressure plate that covers the top surface of the original 31. This original pressure plate 33 allows effective 34 is an illumination lamp that is integrated with the first scanning mirror 35 and operates in the scanning direction, and the second reflection mirror 36 is integrated with the third reflection mirror 37. Since these mirrors 36 and 37 are configured to be moved at half the scanning speed of the first scanning mirror 35, etc., the optical path length until reaching the fixed lenses 38 and 39 is shortened. Scanning is performed while being kept constant at all times. Reference numeral 40 denotes a line sensor composed of a COD memory that inputs the reflected light image on the document 31 obtained through the lens 38; is reflected by the fourth reflecting mirror 41, and the latent image is formed at the latent image forming position 4 on the photosensitive drum 1.
is projected on. Further, 42 is a standard white board used to correct variations in the amount of light and pixels when reading an image by the CCD sensor 40, and 43 is a standard black board for detecting the edge of the original 31. However, in the conventional copying apparatus configured as described above, in general, the original 31 is placed on the glass original platen 32 with the original pressure plate 33 open.
1 should normally be placed in its normal position, except in special cases where it is intentionally moved from its normal position. However, since the original 31 is placed only on the index formed on the original table 32, in addition to the inaccuracy due to visual measurement, when the original pressure plate 33 is closed, the original 31 is placed in the normal position. This has the drawback that the desired copy cannot be obtained because the copy sheet moves from the original position, and the misalignment of the copy is only noticeable when the copy paper is taken out. [Object 1] An object of the present invention is to provide a document coordinate detection device for detecting the position of a document placed on a document table, and a document pressure plate that is mounted on a document pressure plate covered over the document, in order to eliminate the above-mentioned drawbacks. and a control means that automatically drives the document moving device to guide the document to the correct position when the document coordinate detection device detects that the document position is incorrect. An object of the present invention is to provide a copying apparatus that can correct positional deviations and copy at correct positions. [Example] The present invention will be described in detail below based on the drawings. Note that in the following description of parts having the same functions as those in FIG. 1, reference will be made to FIG. 1, and the same reference numerals will be used. FIG. 2 shows an example of the configuration of a document coordinate detection device according to the present invention. In this example, the surface of the document pressure plate 133 on the side facing the document table 132 is made of a color with low reflectance, for example, black. Also,
A CCD sensor 140 transmits a reflected light image from a document 131 held between a document table 132 and a pressure plate 133 to a lens 138.
In this example, the output from the CCD sensor 140 is sent to the amplifier 1.
41, and further converted into a digital value by an A/D converter 142. Then, this digital value is compared with the standard value read from the standard white board 42 shown in FIG.
Binarizes the image into white or black. Now, as shown in Fig. 83, the original 131 is placed on the original platen 1.
32, the CCD
The reflected light image is read by the pixels of the sensor 140 along the Y-axis, and optical scanning is performed in the X-axis direction, so that each line of the Y-axis is initially blackened by the above-mentioned binary signal. You can see the coordinates of the position where the color changed from white to white, and the coordinates of the position where it last changed from white to black. That is, the shaded area in FIG.
This is a portion where the reflected light is black because the surface of a document pressure plate 133 (not shown) covered on the top surface is black or the like. Therefore, in the B-W detection circuit 145 shown in FIG. 2, based on the binary signal from the binarization circuit 144, the B-W maximum value detection circuit 14 detects these X and X coordinate components as position detection signals.
6 and the B-W minimum value detection circuit 147. Now, when scanning is performed in the X-axis direction, if we trace the locus of the position where the color changes from black to white in FIG. At a point (hereinafter referred to as a corner point) 131A, the color first changes from black to white, and after that, the X coordinate of the changing position gradually decreases until it reaches the minimum value Y, . . . at the corner point 131B. Then, the X coordinate increases and reaches a maximum value of Y at the corner point 131C, after which the point of change from black to white disappears. Therefore, the maximum value detection circuit 146 detects the corner point 131C and outputs the detection signals (X+, Ylw, l1w) from the minimum value detection circuit 14? Then, corner point 131B is detected and the detection signal (X3 + Yl-+IN, N) is sent to CP (not shown).
It can be output to U. Similarly, in the W-B detection circuit 148 shown in FIG.
Based on the binary signal from the value conversion circuit 144, the X and X coordinates of the position where the color last changed from white to black are detected, and these X,
The X coordinate component is output as a position detection signal to the W-B maximum value detection circuit 148 and the W-B i small value detection circuit 150. Therefore, these detection circuits 149 and 150 detect the corner points 131D and 131A, respectively, and output the detection signal (X
2 +YM'M %) Oyobi (X4, Ylm[)
CPU+: can be output. In this way, it is possible to cause the CPU (not shown) to perform various operations as described later based on these position detection signals, and to operate the control device for obtaining proper copies. Next, with reference to FIGS. 4 and 5, a method for calculating the amount of misalignment of the above-mentioned irregular document 131 will be explained. FIG. 4 shows a case where the original 131 is placed diagonally in the same state as in FIG.
indicates the normal reference position in which it should be placed. First, the controller determines that the document is placed diagonally when the positional coordinates of the YMTN and YMTN bonds are different. Therefore, the deviation angle θl at this time is j a n =(
Y, N, ew-Yrw/X,
n −1(Yl, n54W-Yl-m4W/ x, -X
3) can be determined based on the negative value. Further, the example in FIG. 5 shows a case where the original 131 is placed offset in the counterclockwise direction with the corner point 131B as the center. In this case, the deviation angle θ2 is tan-(YMTN w −Y
lw 1w /YI X3) as Melkotkateki,
j a n -” (YMTN bond - Y Kocho/also 1X3
) becomes a positive value, so that the original 131 is located at the corner point 131.
It can be determined that there is a shift in the counterclockwise direction with B as the center. Thus, in order to correct the position of the document 131 placed in this way, in the case of FIG.
All you have to do is move it counterclockwise by 01 degrees.
Furthermore, in the case of FIG. 5, the document 131 may be rotated by an angle of 02 degrees clockwise about the corner point 131B. In this way, after correcting the orientation angle of the original 131,
To move it further to the reference position, use the document moving device again to move the document 131 in the X-axis direction by a distance x 3 in the case of FIG. In the case of FIG. 5, similarly, the distance @x3. It is sufficient to move Y pqnr in the X-axis direction. Note that the size of the original document 131 can also be calculated. In other words, in the case of FIG. 4, the longitudinal dimension xL of the original 131 can be determined by (YI-Y3)CO8θ1, and the width direction dimension YB can be determined by (Y KIN Q Y MIN4
y) Cosθ. Also, the fifth
In the case of the figure, similarly, set X to (Xt −4X
3) Cosθ21YB (-1-YMIII-rr
w) It can be expressed as Cosθ2. Next, the document moving device will be explained with reference to FIGS. 8(A) and 8(B). FIG. 8(A) shows a moving mechanism incorporated inside the document pressure plate 133, where 201 is shown in FIG. 6(B).
) is a stepping motor for rotating the document moving member 202, and 203 is the stepping motor 20.
This is a holding member that holds 1. This holding member 203 is movable laterally, and is movable along the guide groove 204A of the striking member 204. However, by connecting both ends of the wire 208 stretched between the pulleys 205A and 205B to the holding member 203, it can be moved in the Y-axis direction by the stepping motor 207. 208 is a guide groove for moving the running member 204 in the X-axis direction, and by connecting both ends of a wire 210 stretched between the pulleys 208A and 209B to the running member 204, the running member 204 is moved by the stepping motor 211.
can travel in the X-axis direction. Further, the holding member 203 has a magnet 212, and when the magnet 212 comes into contact with a reed switch 213 provided on the traveling member 204, the switch 213 is closed, and the X-axis home position is detected, and at the same time, the stopper 214 Positioned by Further, the traveling member 204 has a magnet 215, and when the magnet 215 comes into contact with the reed switch 218, the switch 2
16 is in the closed state, the home position of the Y axis is detected, and at the same time, positioning is performed by the stopper 217. Note that 218 indicates a home position in which positioning has been performed in the X-axis and Y-axis directions. 220A to 220D are support columns for the document pressure plate 133;
When there is no need to correct the position of the document 131, the support columns 220A to 220D are retracted and stored in the outer shell 133A forming the document pressure plate 133. When it is necessary to move the document 131 to correct its position, the support columns 220A to 220I are driven by a drive means (not shown) in response to a document pressure plate movement signal from a CPU (not shown) to move the pressure plate outer shell. 133A is lifted upward, and only the document moving member 202 is kept in contact with the document 131. FIG. 7 shows the configuration of the drive circuit of the document moving device. 230
is a controller, and the controller 230 receives a signal S as rotation data such as rotation angles θ1 and 02 for correction, a movement data signal SX indicating the amount of movement in the X-axis direction, and a movement data signal SX indicating the amount of movement in the Y-axis direction. Instructing movement data signal sY
Also, home position detection signals sHX and SHY in the X-axis and Y-axis directions are supplied. Therefore, the controller 230 controls the Baum positive position. The document moving device is initialized based on the John detection signals SHX and SHY, and first, the support columns 220A to 2201
1 via the driver 231 to lift the document pressure plate. Next, when it is necessary to correct the angular deviation of the original 131, the rotation signals E, F, E, F are sent to the stepping motor 201 via the driver 233 depending on whether the rotation is clockwise or counterclockwise based on the data signal S1-. and rotate the moving member 202 to execute a necessary angle correction circuit of the moving member 202. Furthermore, when movement correction is required in the X-axis direction and the Y-axis direction, the data signal S! Based on and Sy,
In the case of axis movement, rotation signals A and B are sent via the driver 235.
, AJ signals are supplied to the stepping motor 211 to rotate it forward or backward, moving the running member 204 in the X direction or in the Y direction.
In the case of movement in the axial direction, rotation signals c, o; Perform axis movement and X-axis movement. Next, a cassette moving device that makes it possible to move and transfer a copy image in the axial direction of a photosensitive drum will be described with reference to FIG. Here, 306 is a cassette that is movable in the axial direction of the photosensitive drum 1 shown in FIG. 1, and 308A is a cassette support mounted on the cassette 306. Pulleys 307A and 30
Both ends of the wire 308 stretched between the cassette 308 and the cassette 308 are connected to each other, and the stepping motor 308 drives the pulley 307B to move the cassette 308 along the guide groove 310. Reference numeral 311 is a paper feed roller that feeds the copy paper 312 from this cassette 308, and 313 is a roller rotation shaft that holds the paper feed roller 311 in a movable state in the axial direction. Therefore, the cassette support stand 30 is attached to the paper feed roller 311.
The other end of a lever 314 whose end is fixed is lightly abutted against the lever 314, and when the cassette 308 is moved along the guide groove 310, the paper feed roller 311 also touches the lever 31.
4 to respond in the same direction. Furthermore, 315 is a shield plate attached to the cassette support stand 306A, and 316 is a photointerrupter arranged on the housing 317 side of the device, and the cassette 30 is placed in a position where the shield plate 315 shields the photointerrupter 316.
8 home position is detected and positioned by stopper 318. FIG. 8 shows an example of the configuration of the drive circuit of the cassette moving device, where 330 is a controller. This controller 330 is connected to the cassette 30 via an operation section to be described later.
The movement data signal Sc regarding the movement amount of No. 6 and the home position detection signal SH from the photo ink club 318
C can be supplied. In this manner, the controller 330 executes initialization using the detection signal SHc, and supplies either forward or reverse rotation signals L and L to the stepping motor 308 via the driver 331 based on the data signal Sc to rotate the cassette. 306
movement can be executed. Next, the lens moving device will be explained with reference to FIG. Here, 438 is a zoom lens disposed in the irradiation optical path toward the drum 1 (see FIG. 1), and in this figure, the X axis is the direction of the irradiation optical path, and the Y axis is the axial direction of the drum 1. The zoom lens 438 is installed on a lens stand 440, and the lens stand 440 is movable along a guide groove 441, and both ends of a wire 443 stretched between pulleys 442A and 442B are attached to the lens stand 440. By connecting the
Allows movement in the axial direction. Furthermore, 445 is a lens rotation member capable of linear movement in the Y-axis direction, and one end of the rotation member 445 is slidably held in a guide groove 446, so that the lens stand 440 can be moved in the X-axis direction. When the member 445 is moved linearly in the Y-axis direction, the lens 439 can be rotated around its optical axis 439A, thereby changing the magnification of the lens 439. 447 is a magnet attached to the lens stand 440, 448
is a reed switch, and when the magnet 447 contacts the reed switch 448, the contact is closed and the home position in the X-axis direction is detected. and is positioned by stopper 448. Note that all the devices described above are installed on the traveling member 450. Thus, the pulley 4 is attached to this running member 450.
Both ends of a wire 452 stretched between 51A and 451B are connected, and a stepping motor 453 drives a pulley 4.
51B to make the member 450 movable along the guide groove 451. 454 is a magnet attached to this traveling member 450;
55 is a reed switch, and when the magnet 454 comes into contact with the reed switch 455, the contact is closed and the home position in the Y-axis direction is detected.
Positioning is performed by a stopper 456. FIG. 11 shows an example of the configuration of the drive circuit of the lens moving device. Here, 460 is a controller, and the controller 460 is provided with an X-axis movement data signal 569 related to the magnification of the image, a Y-axis movement data signal Ss related to the movement of the image in the drum axis direction, and a reed switch 44 through an operation unit to be described later.
An X-axis home position detection signal SLX from 8 and Y-axis home position detection signals S and Y from reed switch 455 are supplied. In this way, the controller 460 executes initialization using the detection signals S, , H
; σ, ■, and the X of the lens 439 shown in FIG.
The magnification of the copied image can be changed by moving in the axial direction and rotating around the optical axis 439A. If the designated data relates to image movement, the rotation signal I, J or 19 is supplied to the stepping motor 453 via the driver 463, and the lens 43
8 can be moved laterally in the Y-axis direction to perform an image shift. As is clear from the above description, the copy image can be moved in the axial direction of the photosensitive drum 1 using any of the document moving device, the cassette moving device, and the lens moving device. That is, FIG. 12 shows a case where the image is shifted in the axial direction of the drum 1 by the document moving device. In this case, by moving the document 131 to the position indicated by the broken line in the axial direction, the reflected light image is shifted. An image is formed at the position indicated by the broken line on the drum through the lens 438, and a copy image 312A is obtained on the copy paper 312 by shifting to the position indicated by the broken line. FIG. 13 shows a case where a similar shift is executed by a cassette moving device. In this case, by moving the cassette 30B to the position shown by the broken line, the copy paper 312 stored in the cassette 306 is moved to the drum 1. Since the paper is fed to the position shown by the dashed line, a copy image 312A is obtained on the copy paper 312 at the position shown by the solid line. Furthermore, FIG. 14 shows a case where the image is shifted by the lens moving device, and in this example, the original 131 and the cassette) are shifted.
3061 does not need to be moved, and only the lens 439 is moved in the axial direction of the drum 1. Therefore, copy paper 3
12, a copy image 312A can be obtained at the position indicated by the broken line. Next, the copy image 312A is scanned in the scanning direction, that is,
To shift in a direction perpendicular to the axis of drum 1, use the 15th
This is also possible by adjusting only the registration timing of the registration rough as shown in the figure. Obedience A
L size 11r! By driving the registration roller 7 after a certain period of time of scanning starting from the 1911 small and small keys 1111, the leading edge of the image is brought to -fi on the copy paper 312. Note that m here is the scanning distance until the registration roller 7 is driven with a certain time delay. Therefore, when moving the copy image 312A to the leading edge of the copy paper 312, the registration roller 7 is driven at a timing that is longer than the above-mentioned fixed time, and the copy @ 312A is moved to the rear end of the copy paper 312. When moving to the side, move the registration roller 7 faster than a certain time.
All you have to do is drive it. Therefore, by driving the registration rollers 7 at an accelerated timing such as, for example, advancing the copy paper 312 by the dimensions, the image on the original 131 can be moved to a position P' close to the trailing edge on the copy paper 312. I can do it. In this case, the image can be moved to a similar position P' on the copy paper 312 by moving the original 131, for example, to the left in this figure by the dimension text using the original moving device. Note that it goes without saying that the adjustment of the registration timing described above and the movement of the document 131 by the document moving device may be used together. Next, with reference to FIGS. 17 and 18, an explanation will be given of an operation section that enables operations such as document area and copy area setting and magnification designation of the copying apparatus of the present invention, and a display section on which these are displayed. That is, in the present invention, by operating various keys provided on the operation section 500, the position and size of the original and copy paper, as well as the image area can be displayed on the display section, and at the same time, the selection of the 41@ rate and the Various modes can be executed by operating the play key and other various mode keys. In FIG. 17, 501 is a magnification designation key, and 502 and 503 are magnification increase keys and magnification reduction keys. By pressing the designation key 501 to designate the magnification, and then operating the key 502 or 503, The magnification is increased or decreased, but these magnifications t±the display section 8 shown in FIG.
00 is displayed as a number in the magnification display section 601. 510 is a group of desired area designation keys; 511 is a document area designation key; 512 is a copy area designation key;
Reference numerals 13 and 514 are light emitting diodes LEDs for displaying original designation and copy designation, respectively. Furthermore, 515 to 5 provided on the top of these keys
Reference numeral 22 denotes an operation key that can freely move the original line 610 and the copy line 620 displayed on the display section 600 left and right and up and down. Therefore, when placing the original 131 in a desired area,
When you press the original area designation key 511, the LEII 513 that displays the designation lights up, and the LED 514 remains off, so you can press the keys 515 to 52.
2 to move the document line 810 to a desired area. That is, when the line designation key 515 is pressed, the display section 6
In 00, among the rectangular frame lines of the document line 610, the movement of the left frame line 610L is indicated by the LED.
It is displayed by lighting 515S. Therefore, by pressing the line operation key 517, the frame line 810L can be moved to the left, and by pressing the line operation key 518, the frame line 610L can be moved to the right. 600 is displayed as a number, as shown as -14 in FIG. 18, and at the same time, its frame [8101, is also shown in the moved position. Similarly, when the line designation key 516 is pressed, the movement of the frame line 610R on the right side of the document line 810 is displayed on the display section B00 by lighting the LED 518S.
0R can be moved to the left and right, and the display is displayed on the display section 600 in the same manner as described above. Furthermore, by pressing the line designation keys 515 and 518 at the same time, the frame lines 810L and 610R can be returned to the original initialization lines 111111t-3 to 611R. Next, to move the upper frame line 8100 and lower frame line 610D of the original line 810, line designation keys 518 and 520 are operated. Thus, with the line designation key 519 pressed and the LED 5113S lit, the line operation keys 521, ? The frame line 610U can be moved upward and downward by pressing 1 and 522, and by pressing the line operation keys 521 and 522 with the line designation key 520 turned on and the LED 520S lit. Frame line 6
10D can be moved upwards and downwards. Note that the amounts of these movements and the positions of the moved frame lines 810U and 810D are displayed on the display section 800. Also,
By pressing line designation keys 519 and 520 simultaneously, these frame lines 610U and 610D can be initialized to the positions of initialization lines 611u and 811D. The case of specifying the document area has been described above, but in the case of specifying the copy area, by pressing the copy area specifying key 514, the specification is displayed by lighting the LED 514, and the LED 513 is kept in the off state. Therefore, when moving the left frame line 620L of the rectangular copy line frame line 820 shown on the display section 600, press the line designation key 515 and press the line operation keys 5!5 in the same manner as described above. 516, and in the case of the right frame line 620R, the same operation can be performed by pressing the line designation key 516. In addition, when moving the upper frame line B20U and the lower frame line 820D among the frame lines 620, use the line designation key 5
Pressing 18 and 520 followed by line operation key 521
and 522 operations. Also, by pressing the line designation keys 515 and 516 simultaneously, the frame line 6
20L and 620R to the initialized copy lines 621L and θ21R, and by simultaneously pressing the line designation keys 518 and 520, frame lines 620U and 8
20D can be initialized to the position of initialized copy lines 621U and 621D. 530 is a document detection key for detecting the size of the document. When the original detection key 530 is pressed, the optical scanning device,
That is, in the example of FIG. 1, the light source lamp 34° mirror 35.
36, 37 and the lens 38 performs pre-scanning, the CCD line sensor 40 detects the position of the document 131, and the position can be displayed on the display section 600. Therefore, if there is a deviation in the position or orientation of the original 131,
The original 131 can be returned to its normal position by the original moving device via the controller 230 shown in FIG. The dimensions can also be displayed numerically. Thus, the display section 80
0 document size display area 602 indicates that the size is, for example, 0R.
-A4 is displayed. 540 is a cassette display key; 540 is a cassette display key;
40 is pressed, the size of the copy paper 312 stored in the selected cassette 306 is displayed on the display section 600 as a copy initialization line 621, and at the same time, its length is displayed in units of llff1, and the size name is displayed. It is displayed on the cassette size display section 603. Reference numeral 545 is a switching key for the developing device 5 (see FIG. 550 is a multiple mode key;
Multiple copying can be specified by pressing this key, and the switching flapper 17 shown in FIG. 1 is moved to the solid line position.
jJ, the copy paper 312 can be sent to the intermediate tray 18, and the next multiple copy can be executed. 560 is a group of keys for the duty car selection mode. That is, 585 is an automatic magnification calculation key, and when this automatic magnification calculation key 565 is pressed, the magnification of the copy area on the copy paper 312 with respect to the image area on the original 131 is calculated, and the magnification is displayed. In other words, when the key 565 is pressed, the LED 585S turns on and other L lights on the same line indicate that the magnification mode is on.
In this case, the size of the document 131 is visually detected, and the specified copy paper 31 is
2, that is, the size of the cassette) 30El (see FIG. 8) is displayed on the display section 600. Therefore, assuming that the operator has specified the desired image area on the original 131 and the desired copy area on the copy paper 312 by variously operating the group of desired area specifying keys described above, the key 585 is pressed. Then, the magnification of the copy area with respect to the image area is visually calculated, and the magnification is displayed on the magnification display section 801. In this case, the x:Y ratio for the previously designated area is stored in the CPU (not shown), and when specifying the area later, the X:Y ratio of the previously stored area is stored. Line 810 or line 820 moves corresponding to the ratio of . Ru. 570 is an automatic copy area selection key. By pressing the key 570, it is determined that the copy area day shift selection mode is selected.
ED 5? This is indicated by the lighting of the OS and the turning off of other LEDs in the same row. In this case, the size of the original disaster 131 is detected visually, and the size of the specified copy paper, that is, the cassette, is displayed on the display section 600. Is displayed. Therefore, when the operator specifies a desired image area on the original m131 and specifies the magnification by operating the magnification designation key 5011 magnification change keys 502 and 503, and presses the area selection mode key 570, the copy The area to be copied on the paper 312 is calculated visually and displayed as a copy line 620. In this case, further press the copy area key 512,
It goes without saying that by operating the keys 515 to 522, it is possible to move the copy line 620 vertically and horizontally while keeping it in this state. 575 is an eye movement image area selection key. By pressing the key 575, the image area eye movement selection mode is indicated by the lighting of the LED 575S and the other lights in the same row.
In this case as well, when the size of the document 131 is visually detected, the number 84 and the specified size of the copy paper 312 are displayed on the display section 600. Therefore, when the operator specifies the copy area and magnification on the copy paper 312 and presses the image area selection key 575, the image area on the document 131 is visually calculated and the image line 610 is is displayed on the display section 600. In this case, by further pressing the U disaster area key 513 and operating the keys 515 to 522, it is possible to move the image line 610 vertically and horizontally while maintaining its shape. 580 is an original size selection key, and by pressing the key 580, the original size selection mode is displayed by lighting up LE05BO3 and turning off the other LEDs in the same row, and in this case, it is specified. Only the size of the copy paper 312 that has been selected is displayed on the display section 600. Therefore, when the handler specifies the copy area to be obtained and the magnification on the copy paper 312 and presses the document size selection key 580, the corresponding size of the WC magnification 131 is displayed. The original initialization line 611
The size is displayed as . Note that the image area on the original document 131 and the copy area on the copy paper 312 can be set automatically or manually by the key operations on the operation unit 500 described above. Copying the image area to the copy area can be achieved using a series of means such as the document transfer device, lens moving device, and cassette moving device described above. Further, by operating the developer switching key 545 to specify the color for copying, or by operating the multiplex mode key 550, the copy paper 312 is temporarily held in the intermediate tray 18 and the next specification is made, thereby editing the image. Furthermore, it is also possible to specify a color each time a copy is made. 590 is a moving cassette selection key. By pressing the key 580, the LE
o This is displayed by turning on the 590S and turning off the other LEDs in the same row, and in this case, only the automatically detected document size is displayed on the display unit 600. Therefore, the operator specifies the image area on the document 171 and the magnification, and then presses the eye movement cassette selection key 580.
When is pressed, the optimum size of the copy paper 312 that meets these conditions is visually calculated, and the cassette size containing the copy paper 312 of that size is displayed on the cassette display section 803. In addition, if there is no such cassette size, only the copy line 621 corresponding to the size is displayed and the L
Eo 5905 is flashed. . In the above explanation, we have explained the case where the document size is detected by a combination of an optical scanning device and the COD line sensor 40, but in this case, pre-scanning before copying is required as described above. It is said that Therefore, an area sensor (not shown) can be used in addition to the CCO sensor 4o and the optical scanning device, and in this way, the position of the source material 131 can be detected without pre-scanning. Needless to say, it is possible to correct the position by driving the document moving device while observing the positional deviation displayed on the display unit 600 when the key 530 is pressed. As described above, the operation unit 500 not only allows inputting the selection of the size and position of the image area and the copy area, the setting of the magnification, and the execution of operations related to these before copying, but also the size and position of the original 131. , position, cassette size, etc. are all sequentially displayed on the display unit 600. Therefore, when a copy key (not shown) is pressed to start copying, the position and size of the document 131 can be detected, and the position and size of the original 131 can be detected on the display unit θ00. If the document 131 is in an incorrect position, the start of copying will be suspended for a certain period of time regardless of whether the copy key is pressed, and the operator will be alerted and asked whether corrections can be made. You can also. Therefore, if the document moving device is not driven or the document pressure plate 133 is not manually released within a certain period of time, it is assumed that the handler has approved the incorrect position, and the copying operation is automatically started, or the copying operation is restarted. It is also possible to start the operation only when the button is pressed. [Effect J As explained above, according to the present invention, the document coordinate detection device detects the position of the document placed on the document table in relation to the two-dimensional coordinate axes X and Y set on the document table. and a document pressure plate that is covered over the document, the document can be rotated around an axis perpendicular to the document table, and the document can be moved in the X-axis and Y-axis directions. A control means is provided for operating the document moving device to guide the document to the correct position when it is determined that the position of the document detected by the document moving device and the document coordinate detection device is incorrect. As a result, it is possible to prevent the copying from being carried out without realizing that the original placed in the conventional manner is in an incorrect position, and the quality of the copying can be improved.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an example of the configuration of a conventional copying machine, Fig. 2 is a block diagram showing an example of an M-damage coordinate detection device of the copying machine of the present invention, and Fig. 3 shows input to the document coordinate detection device. FIG. 4 and FIG. 5 are explanatory diagrams showing an example of input coordinates when the original is deviated from the normal position. FIGS. FIG. 7 is an explanatory diagram showing an example of the configuration of the drive circuit of the document moving device along with its operation, and FIG. 8 is a cassette movement of the copying device of the present invention. FIG. 8 is an explanatory diagram showing an example of the configuration of the drive circuit of the cassette moving device together with its operation; FIG. FIG. 11 is an explanatory diagram showing an example of the configuration of the drive circuit of the lens moving device together with its operation. FIGS. Figures 15 and 16 are schematic diagrams showing three examples of the procedure for moving the image from the image position on the document in the direction of the drum axis, respectively. FIG. 17 is a model diagram showing an example of the key arrangement of the operating section of the copying device of the present invention, and FIG. 18 is a display section of the copying device of the present invention and its display. FIG. 3 is an explanatory diagram showing an example of a figure and a take displayed in the section. 1... Photosensitive drum, 2... Exposure lamp, 3.8.10... Charger, 4... Exposure position, 5... Developing device, 5A, 5B... Developing roller, 8, 8A, IIIB, 30El...cassette, 306
A...Cassette support stand? ... Registration roller, 8A, 8B ... Paper feed roller, 11 ... Conveyance belt, 12 ... Fixing roller, 13 ... Roller, 14 ... Paper ejection roller, 15 ... Tray, 16... Toner collector, 17... Flapper, 18... Tray, 19... Paper feed roller, 20... Blank exposure device, 31.131... Original, 131A, 131B, 131G, 1310...corner point,
131L... Image tip, 32.132... Original table, 33, 13.3... Original pressure plate, 133A River outer shell, 34... Illumination lamp, 35.36, 37.41... Mirror, 38.39...
-Lens, 40...Line sensor, 42...Standard white board, 43...Standard blackboard, 138...Lens, 140...Sensor. +41...Amplifier, 142...A/D converter, 143...Correction circuit, 144...Double circuit, 145...B-W detection circuit, 146...B-W maximum Value detection circuit, 14? ...B-W minimum value detection circuit, 148...W-B detection circuit. 148...W-B maximum value detection circuit, 150...W, B minimum value detection circuit, 201...Stepping motor, 202... Original moving member, 203... Holding member, 204... Running member, 204A, 208... Guide groove, 205A, 205B, 20θA, 209B... Pulley, 208.210... Wire, 207.211... Stepping motor, 212.2
15... Magneto 2, 213.218... Reed switch, 214.217
...Stopper, 218...Home position, 220A-2200...Support column, 230.330,480...Controller, 231.
233, 235, 331, 481, 483... Driver, 307A, 307B... Pulley, 308... Wire, 308... Stepping motor, 310... Guide groove, 311... Paper feed roller, 312...Copy paper, 312A...Copy image, 313...Roller rotating shaft, 314...Shihachi, 315...Shipping board, 31B...Photo interrupter, 31? ...housing, 318...stopper, 439...zoom lens, 43θA...optical axis, 440...r lens stand, 441...guide groove, 442A, 442B...pulley, 443... -Wire, 444...Stepping motor, 445...Lens rotating member. 446...Guide groove, 447.454...Magnet, 448.455...Reed switch, 4411.45
DESCRIPTION OF SYMBOLS 111... Stopper, 450... Running member, 451... Guide groove, 451A, 451B... Pulley, 452... Wire, 453... Stepping motor, 500... Operating unit, 501. ...Magnification specification key, 502...Magnification increase key, 503...Magnification reduction key, 510...A group of area specification keys, 511...Original area specification key, 512...Copy area specification key, 513 .514,515S, 51B5,519S, 52
0S... Light emitting diode (LED), 515.516.5111, 520... Line designation key, 517.518, 521.522... Line operation key, 530... Document detection key. 540...Cassette display key, 545...Developer switching key, 550...Multiple mode key, 560...Selection mode key group, 565...Auto magnification calculation key, 585A, 570A, 575A, 580S, 590S・
...LED, 570...Automatic copy area selection key, 5
75... Automatic image area selection key, 580... Original size selection key, 580... Automatic cassette selection key, 600... Display section, 801... Magnification display section, 802... Original size display 603... Cassette size display section, 804... Color display section, 610... Document line, 810L, jlloR, 8100, 8100... Frame edge, 811.811L, 811R, elfυ, 8110.
...Initialization original line, 820...Copy line, 820L, 82OR, 820U, 820[]...Frame line, 821.621L, 821R, 1lt21U, 821
[)...Initialized copy line. , 1 General I ↓ ヰ

Claims (1)

[Scope of Claims] A copying device in which a document placed on a document table is covered by a document pressure plate to make a copy, the document being capable of detecting the position of the document as two-dimensional X-axis and Y-axis coordinates. a coordinate detection device, a document moving device capable of moving the document in the X-axis and Y-axis directions and rotating around an axis perpendicular to the document table; and a position of the document detected by the document coordinate detection device. and when at least one of the skewed feeding states is determined to be incorrect, the document moving device is driven to move the document to a predetermined position. A copying apparatus characterized in that it comprises a control means that can be controlled so as to guide the user. (Hereafter, margin)