JPS61169857A - Image forming device - Google Patents

Abstract

PURPOSE:To form an image while erasing, expanding, reducing, moving, or coloring an optional part of an original image selectively by providing a multiple copying function of an original, a function for specifying an optional range of the original, a function for erasing images inside and outside the specified range selectively, and functions for expanding, reducing, and moving an image. CONSTITUTION:Operation keys on a console panel are operated to specify an erasure range E1 of the original and a copy range E2 at a movement destination through spot light and when a copy key is pressed, the 1st carriage 411 and a photosensitive drum 10 operate and one-line data are read out of the memory of a computer successively and sent to a store register through a shift register to turn on light emitting elements of an erasing array 150 selectively according to the output signal, thereby erasing the image in the area E1 on the photosensitive drum. Data expanded or reduced to the range E2 is exposed by an exposure part Ph, developed with toner of a specified color at a developing part 12, and transferred to a form at a transfer charger 18.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus applied to, for example, an electronic copying machine.

[Technical background of the invention and its problems]

In general, the electronic copying machine Fi has the function of copying an original image directly onto a sheet of paper, or enlarging or reducing the original image for copying.

Incidentally, there may be cases where there are unnecessary portions of the original image KFi or portions that are desired to be enlarged or reduced. However, conventional copying machines cannot partially erase, enlarge, or reduce a document image to copy it.

[Purpose of the invention]

This invention has been made based on the above circumstances, and its purpose is to form an image by selectively erasing, enlarging, reducing, moving, or coloring any part of a document image. The present invention aims to provide an image forming apparatus.

[Summary of the invention]

This invention uses, for example, a function for multiple copying of a document, a function for specifying an arbitrary range of a document, a function for selectively erasing images within or outside the specified range, and a function for enlarging, reducing, and moving images. This allows the image of a desired portion of the document to be moved to another portion of the document and to be copied in a different color.

[Embodiments of the invention]

4 and 5 schematically show an image forming apparatus, such as a copying machine, according to the present invention.

That is, 1 is a main body of a copying machine, and a document table (transparent glass) 2 is fixed to the upper surface of the main body 1 to support a document. The document table 2 is provided with a fixed scale 21 that serves as a reference for setting the document, and is further provided with a document cover 1 which can be opened and closed near the document table 2. and work table 1. is provided. When the optical system consisting of the exposure lamp 4 and mirrors 5 and 6°7 moves back and forth in the direction of arrow a along the lower surface of the document table 2, the document set on the document table 2 is moved back and forth according to K. It is designed to be exposed and scanned at times. In this case, mirror 6.7 moves at half the speed of mirror 5 so as to keep the optical path length constant. The light reflected from the original by the scanning of the optical system and the light reflected from the original by the light irradiation of the remote exposure lamp are reflected by the mirrors 5 and 6.
7, and then passes through the variable magnification lens block 8, and then passes through the mirror 9tt4? It is reflected by t*'s and guided to the photosensitive drum 10, so that the image of the document is formed on the surface of the photosensitive drum 0.

The photosensitive drum 10d rotates in the direction of arrow C, and the surface of the photosensitive drum 10d is first charged by a charging device 11, and then an image of the document is exposed to slit light, thereby forming an electrostatic latent. This electrostatic latent image is formed by developing units 12, . 12. The fact that the toner is attached is made more visible. On the other hand, the paper (image forming object) P is stored in the selected upper paper feed cassette 131.
Middle paper cassette 13 Snow, or lower paper cassette 1
33 to the delivery roller 14. , 14! , I J, and roller pairs is, , is, , is, and are taken out one by one, passed through a paper guide path 16**16**16s', and guided to registration rows 2 and 17, and by this roller pair 17. It is set to K so that it is sent to the transfer section. Here, each of the paper feed cassettes 1B, 13°, 13. is removably provided at the lower right end of the main body 1, and is designed so that either one can be selected on the operation panel described later.

Note that each of the above paper feed cassettes 1B, 13. .

13 are cassette size detection switches go, , respectively.
The cassette size is detected by the detection switches 60, . 60. ．． 60.
is composed of a plurality of microswitches that are turned on and off according to the insertion of cassettes of different sizes.

On the other hand, the paper P#-t1 sent to the transfer section has a transfer charger 1.
By coming into close contact with the surface of the photoreceptor drum 100 at the portion 8, the toner on the photoreceptor drum 10 is transferred by the action of the charger 18. The transferred paper P is peeled off from the photosensitive drum 10 by the action of the peeling charger 19, conveyed through the conveyor belt 20t, and sent to a pair of fixing rollers 2 as a fixing device provided at the terminal end of the conveyor belt 20t. , the transferred image is fixed by passing through this. After fixing, the sheet is discharged to a paper discharge tray 25 outside the main body 1 by the paper P, the pair of delivery rollers 22, the sorting gate 23 operated as shown by the solid line, and the pair of paper discharge rollers 24. After the transfer, residual toner on the surface of the photoreceptor drum 10Vi is removed by a cleaner 26, and any residual image is erased by a static elimination lamp 27, so that the image returns to its initial state. Note that 29 is a ninth cooling fan that prevents the temperature inside the main body 1 from rising.

On the other hand, a double-sided multiple copying unit 28 is provided below the copying machine main body 1, which enables double-sided copying on one sheet of paper or multiple copies on the same side. this unit)
z tj KFi, a plurality of roller pairs 28b, 28c, and 28d are provided, including the aforementioned sorting gate 23 and paper ejection roller pair 24, which guide the sheets taken in by the sorting gate 23 to the stacking section 28t. ing. Further, a delivery roller 28e is provided to send out the paper temporarily stored in the stacking section 28aFCFi stacking section 28h. This delivery roller 28e can move up and down as shown by the arrow in the figure, depending on the thickness (number of sheets) of the stored paper. The paper sent out by the delivery roller 28e is guided to the control gate 28g via a separation roller pair 28f that separates and sends out the paper sheets one by one. This control goo) Z 8 g
When performing Fi multiple copying, it is rotated in the direction of arrow M shown in the figure.
The paper is guided to the registration roller pair 17 via the paper guide path 281 of the transport roller pair 28h1.

When double-sided copying is to be performed, the state shown in the drawing is such that the paper is guided to the reversing section 28 via a pair of transport rollers zsJ. When the paper is stored in the reversing section 28kIC, the control gate 28g is rotated in the direction of arrow T in the figure, and the paper sent by the pair of transport rollers 28j is transferred to the pair of transport rollers 28h1.
The paper is guided to the registration roller pair 17 via the paper guide path 281.

In the above configuration, the operations of double-sided copying and multiple copying will be explained. These copies are selected by key operations on the operation panel, which will be described later. First, the case where multiple copying is selected will be explained using FIG. 6. For example, a sheet on which normal single-sided copying has been performed is guided into the double-sided multiple copying unit 28 by the sorting gate 23Fc operated as shown by the dotted line. This paper has roller pairs 28b, 28c, 28
The accumulation section 28g'' is guided by d. At this time, 1.
The delivery roller 28e is located above the stacking section 28.
The copied side of sheet m is facing downward. Thereafter, for example, when another original document tS is set on the platen 2Vc and a copy key (described later) is pressed, the feed roller 28e is lowered and comes into contact with the paper PK, and the paper is sent out by the roller 28eilc. This paper is operated as shown by the dotted line in the separation roller pair 28f1, and is guided to the registration roller pair 17 via the ratio control roller 28g and the conveyance roller pair 28h1, and the paper guide path 281t, where it is copied using another original. At this time, the surface of the paper that has already been copied is placed on the photoreceptor drum I.
On the 9th page facing OK, images from other originals are being copied while the image is already being copied. The copied paper is discharged to a paper discharge tray 25 via a conveyance belt 20, a pair of fixing rollers 21, a pair of delivery rollers 22, a sorting gate 23 operated according to the solid line, and a pair of paper discharge rollers 24.

Next, double-sided copying will be explained using FIG. 1. In this case as well, similarly to multiple copying, the sheets on which one normal single-sided copying has been performed are stored in the stacking section 28& of the double-sided multiple copying unit 28. After that, for example, if you set another original on the document table 2 and press the copy key, the paper will be moved by the feed roller 28eK.
is sent. This paper is separated by a pair of separation rollers 28f.

Control game in solid line state) 28g, conveyance roller pair 28j
The inverting section 28k is guided through the inverting section 28k. When the trailing edge of the sheet passes through the control gate 28g, the control gate 28g is brought into the state shown by the dotted line, and the conveyance roller 2Jj is reversed. As a result, the paper is controlled by the control game) 28 g, conveyance roller pair 2
Registration roller pair 17 via 8h1 paper guide path 281
The document is then led to the document and copied using other manuscripts.

At this time, since the back side of the sheet that has already been copied faces the photosensitive drum 10, another document image is copied onto this back side. The sheet on which copying has been completed is discharged to the paper discharge tray 25 in the same manner as described above.

FIG. 8 shows the operation panel 30 provided on the main body 1iC. 30□ is a copy key that commands the start of copying, 30
．． 303 is a numeric keypad for setting the number of copies, etc.; 303 is a display unit for displaying the operating status of each part, paper jam, etc.;
4 are upper, middle, and lower paper feed cassettes 13. ．． 13! ,1
cassette selection key for selecting 31; 30. 30 is a cassette narrowing portion for displaying the selected and next cassette; 30 is a magnification setting key for setting the copy enlargement/reduction magnification in a predetermined relationship;
0. Fi zoom key for steplessly setting enlargement and reduction magnification, 3o, #i display section for displaying set magnification, 30° is density setting section for setting copy density, 30a, 30b, 3
0a and 306Fi are operation keys for moving a spot light source that indicates the erasing position of the document, which will be described later. 30e is a position specification key for inputting the coordinate position indicated by the spot light source, and "f
630g is an erasure range specification key that specifies the erasure range at a designated position, :toh#i is a multiple copy specification key, sol is a double-sided copy specification key, and 30j is used to specify, for example, the developing device 121 containing red toner. For example, the red designation key 30 indicates the developer 1 containing black toner.
2. Non-specified key to specify, 5olid multiple copy function,
This is an edit designation key that uses enlargement, reduction functions, image movement functions, and image deletion functions to enlarge or reduce the image in the range specified by the spot light source to the next area also specified by the spot light source and copy it. These designated keys JOh.

301. When neither 30j nor 30 nor 3011 are operated, and when the power is turned on, the copying machine main body 1 is set to perform a normal one-sided copying operation. FIG. 9 shows a copying machine configured as described above. This shows an example of the structure of the drive source for each drive part of the machine, and is composed of the following motors. That is, 31 is a lens motor, which is the next motor that moves the position of the lens block 8 for changing the magnification. A mirror motor 32 is a motor for changing the distance (optical path length) between the mirror 5 and the mirror 6.7 for changing the magnification. 33
is a scanning motor, which includes the exposure lamp 4 and the mirror 5;
This is the Tanabata stage for moving the mirrors 6 and 7 for scanning the original. A shutter motor 34 is a motor for moving a shutter (not shown) for adjusting the charging width of the photosensitive drum 10 by the charger 11FC during zooming. 35. ．． 35. are respective developing motors, and are connected to the developing device 12. , 12° developing roller, etc. This is a 36d drum motor and is a motor for driving the photosensitive drum 10. 37
A fixing motor is a motor for driving the paper conveying path 22, the pair of fixing rollers 23, and the pair of paper ejecting rollers 24. Reference numeral 38 is a paper feeding motor, which is connected to the feed rollers 16, 1.
This is a motor for driving 6. This is a 39Fi paper feeding motor and is a motor for driving the pair of registration rollers 19. 40 is a fan motor for driving the cooling fan 29t; 401 is a roller pair 28;
This is the ninth motor that drives motors b, 28c, 28d, etc.

FIG. 10 shows a drive mechanism for reciprocating the optical system. That is, the mirror 5 and the exposure lamp 4 are mounted on the #:g1 carriage 411, and the mirror 6.7Fi
Second carriage 41! These four carriages are supported by four 1.4x and tri guide rails 421.
42. It is guided by IC and can move freely in parallel in the direction of arrow a.

That is, the phase pulse motor 33 drives the pulley 43.

An endless belt 45 is stretched between the pulley 43 and the idle pulley 44, and one end of a first carriage 411 that supports the mirror 5 is fixed to a midway portion of the belt 45.

On the other hand, the second carriage 41 supporting the mirror 6.2t!
The guide section 46 of the rail 42 has a rail 42. Two pulleys 47, 47 are rotatably provided at a distance in the axial direction, and a wire 48 is connected between these pulleys 47, 47.
is being handed over. One end of this wire 48 is a fixed part 49
1 to the other end of the fixing part 4 via the coil nut ring 50.
9, respectively. Further, one end of the first carriage 41 is fixed to the middle part of the wire 48. Therefore, as the pulse motor 33 rotates, the belt 45 rotates and the first carriage 41. moves, and the second carriage 41 also moves accordingly. At this time, since the pulleys 47, 47 act as movable pulleys,
First carriage 41. against the second carriage 41. move in the same direction at 1/2 the speed. In addition, 1. The direction of movement of the second carriage 411° 41 is controlled by changing the direction of rotation of the pulse motor 33.

In addition, the copyable range corresponding to the specified paper is displayed on the original copy stand 2tlC. That is, the paper selection key 304
Let the paper size specified by (Px, Py) be,
If the copy magnification specified by the magnification setting keys 306 and 307 is K, the copyable range (X, 7) is x=Px/K y=Py/. Of this copyable range (x * y),
Direction F! A trap is disposed on the back side of the document table 2 and indicated by nine pointers 51.52, and the y direction is indicated by the first carriage 41.52. K is displayed by a scale 53 provided on the top surface of the screen.

As shown in FIG. 11, the above-mentioned pointers 51 and 52
, 55 via a spring 56.

The button is rotated by the pulley 55/fi motor 58, and by driving this motor 58 according to the paper size and magnification, the distance between the pointers 51 and 52 can be changed. There is.

The first carriage 41m is moved to a predetermined position (home position according to the magnification) when the motor 33 is driven according to the paper size and magnification. When 301 is pressed, the first
The carriage 41 is first moved toward the second carriage 412, and then the lamp 4 is turned on and the second carriage 41! is moved in the direction away from.

When scanning of the original is completed, the lamp 4 is turned off and the first lamp is turned off.
The carriage 411Fi is returned to the home position.

FIG. 12 shows the configuration of the feed roller 28e for taking out the paper pt stored in the stacking section 211* and the separation roller pair 28f. A row 228f forming a pair of separation rollers 28f.

zt&f and Id are provided at one end of the shaft portions 65a and 65b. A gear 65a is provided at the other end of the shaft portion 65h, and this gear 65c is meshed with a gear 66a1 provided on the pulse motor 66. Further, the shaft portion 65b
The other end is connected to the shaft portion 66 via a spring clutch 65d.
It is connected to one end of e. A gear est is provided at the other end of this shaft portion 65e, and this gear 65f is meshed with the gear 66aic. Further, a gear 66g is provided at the intermediate portion of the shaft portion 65a, and a chain 651 is stretched between this gear 65g and a gear 65h provided with the delivery row 228eK. In addition, sending out low 2
28e is configured to be driven in the directions of arrows 2 and 3 by a drive mechanism (not shown). In addition, roller 28f,
The one-way clutch 65 is provided with a one-way clutch 651 between the shaft portion 65h and the feed roller 28e and the shaft portion 65j.
Power is transmitted only when the shaft portions 65a, 65j rotate in the direction of the arrow in the figure. Furthermore, 1 said spring clutch esdld roller 28f, 2B! When the force at the contact point of , becomes 71 or more, the shaft portions 65b, 6
The frictional force is set so that 5e slides. Also, a roller 28f.

, 28f, is assumed to be T, and this frictional force T2 and the frictional force T1 of the spring clutch 65d are set to have a relationship of T,>T. Therefore, the rollers 21jf and u are rotated in conjunction with the roller 28f, against the rotation of the normal motor 66.

On the other hand, the frictional force between the paper P and the paper P is Tf, and the roller 28
If TR is the frictional force between e, 28f1, 28f, and the paper P, the relationship between them is FiTi>Tf. Also,
The relationship with the spring clutch 65d is T n >
It is assumed that the condition is set such that TI>T f .

The operation in the above configuration will be explained. When the copy key 301 is pressed again after the already copied sheets P are stored in the stacking section zshllc, the delivery roller 28e is lowered from the position shown by the dotted line in the direction of the arrow in the figure, as shown in FIG. 13(a). Ru.

As shown in FIG. 2B, when the roller 28e comes into contact with the paper P, the motor 66 is rotated, and the rollers 28f, 28f
,,28 eFi is rotated in the direction of the arrow shown. Therefore, the paper P is removed from the stacking section 28a by the delivery row 228e.
is taken out, and this taken out paper P is sent out by roller 2Bh*28f*, as shown in FIG. On the other hand, as shown in FIG.
Sheets of paper p,,p, are taken out at the same time, and the rollers 28f,
.

28f! When the rollers 281. The paper P1 in contact with the p-ra 28f! is sent out in the direction of the arrow. The paper P in contact with the roller 28f! is rotated in the same direction as the row 228f1 by the power of the motor 66, so that it is returned to the collecting section 28a. Therefore, sheets are taken out one by one from the stacking section 28g.

FIG. 14 shows a drive mechanism for the variable magnification lens block 8. As shown in FIG. The motor 31Fi first carriage 41
Lead screen arranged along the movement direction (y direction) of 1! It is designed to rotate -61. This lead screw 61 is provided at one end of the board 62 with a pair of bushings 63□, 63. When the lead screws 61 are screwed together and the lead screws 61 are rotated, the substrate 62 is moved in the y direction. A guide member 621 is provided at the other end of this board 62, and this guide member 62 includes guide rails 64&
C is slidably engaged. Further, the substrate 62J/C is movable in a direction (X direction) perpendicular to the substrate 62, and is provided with a moving body 65 to which the variable magnification lens block 8 is attached. That is, supports 658, 65 . is provided, and this support 65. ．．
65. Guide members 661 and 60 provided on the d board 62
Guided and held by 1. Moreover, the support body 65
A rack 653 is provided on a side surface in the longitudinal direction of 1, and a pinion 68 rotated by a pulse motor 67 provided on the base plate 62 is meshed with this rack 653VC. Therefore, the lens for variable magnification is 8Fi.
By driving the motor 67, it is moved in the J)X direction. In addition, micro switch 691.69. #i detects the initial positions of the board 62 and moving body 65, respectively.

Next, the relationship between the operation of the variable power lens block 8 and the image height formed will be explained. In FIG. 15(a), the focal length of the variable magnification lens block 8 is f, the optical path length from the document table 2 to the lens block 8 is 18, and the optical path length from the lens block 8 to the photosensitive drum l0WI is yb. If the total optical path length from the document table 2 to the photosensitive drum 10 is yc, the optical formula is expressed as follows.

i 7a 7b Also, the magnification is expressed as ni=yuya. Since the focal point [1if of the lens block 8 is constant, the total path length y is required to focus when changing the magnification. It turns out that we have to change ya or yb instead of changing . These ya and yb can be changed by moving the lens block 8 in the y direction (K). Further, the total path length ycFi can be changed by moving the second carriage 41 and changing the position of the mirror 6.7.

On the other hand, as shown in FIG. 15(b), if each of the document table 2, lens block 8, and photosensitive drum 10 is moved at a constant distance, and the lens block 8' is moved in the X direction by a distance x1, for example, by the motor 67JIC. , I on the photosensitive drum 10 is moved by a distance X expressed by the following equation.

In addition, in the case of equal size copying, x2=2x overlap. In this way, by moving the lens block 8 in the X direction, the center of the copied image can be moved.

FIG. 16 shows the overall control circuit, in which the main processor group 2X and the main processor group 1. Second subprocessor group y2. rs
It is mainly composed of. The above main processor group 711
1-1, the operation panel 30 and various switches and sensors, such as the cassette size detection switch 60! , 60.
a high-voltage transformer 76 that detects input from an input device 75 such as, and drives the various chargers; the static elimination lamp 28;
The blade solenoid 27a1 of the cleaner 27, the heater 23a1 of the fixing roller pair 23, the exposure lamp 4, and each of the motors 31 to aO, 5B, 66,67,77
The spot light source 131 . It controls the pulse motor xss, the g4 array 150, the array drive unit 1601, and the like to erase unnecessary portions of the document. In addition, a spot light source 1311, a pulse motor 135, and an erasing array 1
50, array drive unit 160. Memory 140 will be described later.

Among the motors 31 to 40, 58, etc., motor 35. ．．
35. ．． 3fr, 40,401 and developer 1221C
It is controlled by the main processor group 71 via a toner motor 77fi that supplies toner and a motor driver 78,
The motors 31 to 34 and 67.131; ld are controlled by the first sub-processor group 22 via the pulse motor drive/<79'fl-;
゜66 is the pulse motor driver 80'f! : controlled by the second sub-processor group 73. Further, the main processor group 71 controls the heater 2Bg via the four-exposure lamp regulator 81, and the heater 2Bg is controlled by the heater control unit 82.
It is controlled by the main processor group 71 via the main processor group 71. Then, from the main processor group 71, the first. Commands to drive and stop each motor are sent to the second sub-processor group 72, 73, and the first. The second sub-processor group 72, 73 sends the status indicating the drive/stop state of each motor to the main processor group 71.

The first sub-processor group 1211C also controls the motor 3I.
Position information from a position sensor 83 that detects each initial position of 34, 61, and 135 is input.

FIG. 17 shows an example of the configuration of the main processor group 11. That is, 91 is a one-chip microcomviator (hereinafter simply referred to as a microcomputer), which performs key human force detection on an operation panel (not shown) and various display controls through an input/output port 92. Further, the microcomputer 9 is expanded with input/output ports 93 to 9611C.

And input/output port 9.1 K: is high voltage transformer 26
, a printer driver 78, a lamp regulator 8I, and other outputs, an input/output port 94 is connected to a size switch for detecting paper size, and other manual inputs, and an input/output port 95 is connected to a copy condition setting switch and its individual outputs. Inputs etc. are connected. Note that the input/output port 96 is for an option.

FIG. 18 shows an example of the configuration of the first sub-processor group 72. That is, it is connected to the main processor group 71 using a l01Fi microcomputer. 102 is a programmable interval timer for controlling the phase switching interval time of the pulse motor; a set value is set from the microcomputer 101;
When the count is out, a termination pulse is output to the interrupt line of the microcomputer 101. A reference clock pulse is input to the timer 102Vc. Also, microcontroller l0II
When the position information from the position sensor 83 is input to the IC, the position information is input to the IC.

Input/output boats 103 and 104 are connected.

The input/output boat 104Vc drives the motors 31 to 34,67.1 via the pulse motor driver 79.
'35 is connected. In addition, the above input/output boat 10
3 is used when outputting the status signal of each pulse motor to the main processor group 71, etc.

FIG. 19 shows an example of the configuration of the second sub-processor group 73. That is, it is connected to the main processor group 71 by an l1lFi microcomputer. 112 is a programmable interval timer for controlling the phase switching interval time of the pulse motor; a set value is set from the microcomputer 111;
When the count is out, a termination pulse is output. This termination pulse is latched by the latch circuit 113, and its output is supplied to the interrupt line of the microcomputer 111 and the input/output port input line.

In addition, an input/output port 114 is connected to the microcomputer 111, and this input/output port 1141C is connected to the above-mentioned PALNUMO! Driver 80t-via motors 36.3B, 39.
58.66 are connected.

Figure 20 shows the control circuit of the pulse motor, and shows the input/output boat 121 (input/output boat 1 in Figures 18 and 19).
04.114) is the Parnu tongue driver 122
(Equivalent to pulse motor driver 79.80 in Figure 16)
is connected to this pulse motor driver 1221C pulse motor 123 (the pulse motors 31 to 34°36.
38.39.58.66.67.135) are connected.

Figure 21 shows the speed control method of a pulse motor.
The figure (a) shows the speed curve of the pulse motor, and the figure (b) shows the phase switching interval. As is clear from this figure, 1
At first, the phase switching interval is long, gradually becomes shorter, then becomes evenly spaced, gradually becomes longer again, and then stops. That is, this indicates the through-up and through-down of the pulse motor, starting from the self-starting region, starting up, being used in the high-speed region, and then eventually falling down. In addition, 1, @ 11...
tx# indicates the time of the i-phase switching interval.

Next, a function for specifying and erasing the erasing range of this document will be explained. In FIGS. 22 and 23, the first carriage 41. In this case, place lamp 4 in the part where the light of lamp 4 is blocked.
A guide shaft 130 is provided along the guide shaft 130), and a spot light source 131 is movably provided on the guide shaft 130 as means for indicating the erasing range of the document.

As shown in FIG. 23, this spot light source 131 consists of a light emitting element 132, such as a light emitting diode or a lamp, and a lens 133, which are provided facing the document table 2. The light generated by the light emitting element 132 is transmitted through a lens 1331C. In this case, the document table 2 is irradiated with a spot light having a diameter d. This spot light has a brightness that allows it to pass through the document Gt set on the document table 2, for example, the thickness of which is equivalent to that of a postcard. Further, the spot light source 131 is arranged along the guide @130 and connected to the next timing belt (toothed bell) 2J4. This timing belt 134 is passed between a pulley 136 provided on the rotating shaft of a pulse motor 135 and a driven pulley 137.

Therefore, when the pulse motor 135 is rotated, the syspot light source xsxld and the first carriage 41 are moved in a direction perpendicular to the scanning direction. In addition, the guide shaft 13
A position sensor 138 consisting of a microswitch that detects the initial position of the spot light source 131 is installed in the first carriage 411 located at the end of the pulse motor I35.
First, the spot light source 131 comes into contact with the position sensor xssVc so that the initial position is detected.

Next, a method for specifying the erasing range of the document using the spot light source 131t will be explained using FIGS. 24 to 26. This spot light source 131tri is moved by operating the aforementioned operation keys 30a to 30d. That is, operation keys 30b, 30df: When pressed, the motor 33 is driven, and the first carriage 41° and the spot light source 131 are moved in the scanning direction (arrow y direction shown in FIG. 24). 9. Operation key 30a.

3 (When 7e is pressed, the motor 135 is driven, and the spot light source 131 is moved K in the direction perpendicular to the scanning direction (arrow X direction shown in FIG. 24). The operator visually observes the spot light transmitted through the document G. While doing so, operate the operation keys 30a to 30rl, and press the position designation key 30e with the spotlight moved to point S8 on the document G shown in FIG. 25, for example.

Then, the coordinate position specified by S is stored in the main processor group 77 shown in FIG. Similarly, when the point S3 JIc Nubot light on the document G is moved and the position designation key 30e is pressed in a good condition, the position of the point S2 is the main processor group 71K.

be remembered. The position of this spot light can be detected, for example, by counting the number of driving pulses of the pulse motors 33, 135). After this, erase range specification key 30f
When you press , a rectangular area (indicated by diagonal lines) with the <5ssSt point as the diagonal point as shown in Figure 25 (a) is designated as the erasing range. Specify the 84 point (8° point) of original G and press the erase range specification key sog
When you press , the area other than the square with the four 58ss points as diagonal points is designated as the erasing range. When the 1 erasing range designation keys 30f and 30gt are pressed in this way, the main processor group 71 performs calculations based on the positions of the two specified points, and the memory 140 stores the high level signal 11'' in the erasing area. A low level signal 10'' is stored in the other portions. That is, in this memory 140, for example, the capacity in each column direction is approximately equal to the movement distance of the spot light source 131 in the X direction÷the position sharpness in the X direction, and the capacity in each row direction is approximately equal to the movement distance of the spot light source 131 in the y direction÷. It is made up of RAMK whose positional viewing angle in the y-direction is almost the same as that of the main processor group 7I.
In the case of Fig. 5 (a), as shown in Fig. 26 (a), and in the case of Fig. 25 (b), as shown in Fig. 26 (b)
As shown, a high level signal is stored at the address corresponding to the shaded area, and low level signals at other addresses K are stored.

- As shown in FIG. 27, an erasing play 150 as erasing means is provided close to, for example, between the charger 11 and the exposure section phO of the photosensitive drum XO. As shown in FIGS. 28 and 29, this erasing play 150 includes a plurality of light shielding cells 1 in a direction perpendicular to the rotational direction of the photoreceptor drum 10.
51 are arranged, and inside each of these cells 151, a light emitting element 152 made of, for example, a light emitting diode is provided, as shown in FIGS. Further, an opening I of each cell 151 facing the photoreceptor drum 10
A lens 153 is provided to focus the light from the /cFi light emitting element 152 onto the surface of the photoreceptor drum 10. The number of light emitting elements disposed in the erase play 150 matches, for example, the capacity of the memory 140 in the column direction. Here, if the distance between the light emitting elements 152 is P and the number is N, the total length of the erasing array 150 is Q=NXp.

The erase play 150 is driven by the array driving section 160 described above. This array drive unit 1 f; aFi
As shown in FIG. 31, a shift register 161 having the same number of bits as the number of bits in the column direction of the memory 1400, a store register 162 that holds the contents of this shift register 161, and a store register I62 are turned on and off by the output signals of the store register I62. A plurality of switch elements 163 that are turned off
The movable contacts 163a of these switch elements 163 are grounded, and the fixed contacts 163b are each connected to an erase play 150.
It is connected to each cathode of a light emitting element (light emitting diode) 152 comprising the ftg. The anode of each of these light emitting elements 152 is connected to the power supply VCC through a current limiting resistor R, respectively.
It is connected to the.

After specifying the erasing range of the IC original as described above, when the original cover 11 is closed and the copy key 30 is pressed,
First carriage 41. and the photoreceptor drum lO is operated and 1 said memo! 714o) row direction (26th
One column of data is sequentially read out (shown in the figure). This read data Ds#i clock signal CLK is transferred to the shift register 161 of the array driving section 160. After one column of data is transferred to the shift register 161, the charged portion of the photosensitive drum 1o is transferred to the erase array I.
507/C, the main processor group 71 outputs a latch signal LTH, and the contents of the shift register 161 are supplied to the store register 162 in response to this signal. That is, the erase array rso includes the charger 11 and the exposure section p.
For example, one column of data output from the memory 140 is placed between the erase array 150 and the erase array 150.
and the degree angle of the exposed part ph is θ1), and the photoreceptor drum 1o
Assuming that is rotating at an angular velocity ω, the output timing of the latch signal LTH is controlled so that it is supplied to the store register 1621C before θ, /ω.

Each switch element 163 of the switch circuit 164 is controlled by each output signal of this store register 162. When the output signal of the store register 162 is at a high level, it is turned on, and when it is at a low level, it is turned off. As a result, the light emitting element 152 connected to each switch element 163I/c is turned on when the switch element 163 is on, and is turned off when the switch element 163 is off. Therefore, among the charged portions of the photoreceptor drum 10, the portion where the light emitting element 152 is turned on is neutralized, and even if this neutralized portion is subsequently exposed to light, a static latent layer is not formed, and the original image is not erased. It has been done. Thereafter, the data in the memory 140 is read out column by column in the same manner, and the image is erased.

Next, the main parts of this invention will be explained. This copying machine can copy m sets of original images by using the multiple copy function, enlargement/reduction function, image movement function, and image deletion function described above. tb, i can move the image of a desired part of the original document to another part of the original document and copy it. For example, as shown in FIG. It is possible to move the image of the portion specified in the first range E1 to the second range E and copy it with a different color.

This editing and copying operation will be explained using FIG. 2.

First, the operation keys 30a to 30 of the aforementioned operation panel 3o
d and position designation key 3oe, as shown in Fig. 2(a).
As shown in , the first range HE t with the spot light Si* St
is specified, and then, for example, the unspecified key 12 is pressed. Next, as shown in FIG. 2(b), the spot light S
Second range E! with s = 84! , and then press, for example, the red designation key 12□. Original G has a fixed scale of 21
Since the setting is based on the center Gc of the first range E1. Specifying the second range E, these first ranges E. The center part of the range EteEx of the nail 2 in the X direction and the fixed scale 2.
It is possible to know the distance "1*X1" from the central part Gc of .

That is, as described above, the first. After specifying the second range ExeEt and pressing the edit specification key 30h, the main processor group 21 calculates the difference ΔX (Δxt=x@
-xl) is calculated. This distance Δxld affects the moving distance of the variable magnification lens block 8 in the X direction. In addition, the main processor group 71 also has a spotlight S,
, S, and the coordinate position of Ss -84.
The dimensions of the second range E, , E, in the X and y directions (X zl
e 7 It L (Xz@*yl!) is determined, and based on these dimensions, F) the copying magnification in the X direction and the y direction is determined, and Ky is determined. That is, these copying magnifications K x
* Determined as K V Fi. Here, if the copy magnifications in the X direction and the y direction are different, the smaller magnification is selected, and 10c% of the image specified in the first range El is copied into the second range E. After that, when the copy key SO is pressed, the first carriage 411 etc. are operated, and the erase range designation key 30f is pressed, and the first range E1 is designated by the same operation as when the above-mentioned erasure range designation key 30f is pressed. Parts of the image are erased and other parts are copied using black toner. FIG. 2(c) Fi shows an image copied onto paper P in this manner.

After copying, this paper P is guided into the double-sided multiple copying unit 28 mentioned above, and is moved by the pair of rollers 28b.

28c, 28d, delivery roller 28e1 separation roller pair 2
8f1 control gate 28g1 conveyance roller 28h'i to be conveyed to registration roller pair 17. During this time, the first carriage 41. Id is returned to the home position, and the variable magnification lens block 8 is driven by a pulse theta 67.31 according to the moving distance ΔX in the X direction determined by the main processor group 71 and the copying magnification Kx or d.
is moved to a predetermined position by. Then, the conveyed paper P is fed in synchronization with the operation of the first carriage 411, etc., and the photosensitive drum 10 is As shown in Fig. 2(d) K above, the image other than the part specified in the second range E is erased, and this second range
The range of E! The next image is enlarged and formed by specifying the first range E within the range E. In this way, the image formed on the photosensitive drum 10 is transferred using red toner onto the same surface of the paper PO where the first area E has been erased, and onto the second area 82. FIG. 2(e) shows an image in which a shadow is formed on a sheet of paper PK at 5KL.
The copying process is completed by being discharged onto the tray 25.

According to the above embodiment, it is possible to specify and erase unnecessary parts of a document, and also to enlarge or reduce the image of the document specified in the first range and move it to the part specified in the second range. , and can be formed by changing the toner color. Therefore, it is possible to edit and copy the original image in a variety of ways, making it extremely convenient in practice. Since the light source 131 is provided, space can be used effectively and the size of the apparatus can be suppressed, and a predetermined range of the document can be specified on the document table 2, so operability is good. .

In the above embodiment, when editing and copying, first the first range E□
The specified portion is erased and copied, and then an image of the first range E1 is formed in the specified second range E. However, the present invention is not limited to this. , the range E! of the part specified by ! Add the first range E to the part specified by
K may be used to form the image S of the portion designated by .

Further, in the above description, the next operation was explained using the edit designation key 301, but the present invention is not limited to this, and various types of editing and copying are possible. For example, from a one-color document G shown in FIG. 3(a)K, it is possible to form a copy image in which part A is black, part G is red, and part A is red.

That is, set the document G on the document table 2, first press, for example, the multiple copy designation key 30h1 and the point designation key 30k on the operation panel 30, and then press the operation keys 30g-30 and the finger position designation key 30e1 to designate the erase range. By operating the key 30f, the user specifies the coordinates Sa and Sb to erase the portion G to be copied in red, as shown in FIG. 3(b). When the copy key 301 is pressed in this state, only copy 01 is formed with black toner on the sheet P, as shown in FIG.

Thereafter, when the erasure range designation key sog is pressed, erasure is designated for the area other than the range of the specified coordinates Sa and Sb, that is, the portion G1 to be copied in black. In this state, when the red designation key 30j and the copy key 30 are pressed in sequence, the stacking section 2
Only the 01 copies shown in FIG. 8A to 8C are formed, and the next sheet P is taken out, and only the G2 part shown in FIG. 8D is formed thereon using red toner. Therefore, as shown in FIG. 3(e), the paper P has black and G in the G3 section.

The original image is formed using red toner.

If you want to make multiple copies, first copy the black part G in the same way.
, and then make multiple copies of only the red part G! All you have to do is copy it multiple times.

Furthermore, the color of the toner is not limited to the combination of red and black.

Further, the arrangement position of the erasing array 200 is not limited to between the charger 11 and the exposure section ph shown in FIG. 27, but may be arranged between the exposure section ph and the developing device 12 as shown in FIG. It is also possible to configure the electrostatic latent image that has been formed to be erased according to a designation.

Further, the capacity of the memory 120 can also be changed as required.

It goes without saying that various other modifications can be made without departing from the gist of the invention.

[Effects of the Invention] As described above in detail, the present invention provides an image forming apparatus that can form an image by selectively erasing, enlarging, reducing, moving, or coloring any part of a document image. can be provided.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the image forming apparatus according to the present invention, and FIGS. 2 and 3 are plan views of essential parts shown to explain the editing and copying operations, respectively. The figures shown for explanation, FIGS. 4 and 5, show the configuration of the image forming apparatus. FIG. 4 is a general perspective view, FIG. 5 is a side sectional view, and FIGS. 6 and 7. 8 is a plan view showing the structure of the operation panel, FIG. 9 is a perspective view showing the structure of the drive unit, and FIG. FIG. 11 is a perspective view schematically showing the drive mechanism of the system; FIG. 11 is a perspective view schematically showing the drive mechanism of the pointer; FIG. 12 is a perspective view schematically showing the drive mechanism of the delivery roller and separation roller; Figures (a) to (Φ are respectively side views of the main parts shown to explain the operation of Figure 12, Figure 14 is a perspective view schematically showing the drive mechanism of the variable power lens block, and Figure 15 is 16th diagram shown to explain the relationship between the operation of the variable magnification lens block and the image formed
17 is a configuration diagram showing the overall control circuit, FIG. 17 is a configuration diagram of the main processor group, FIG. 18 is a configuration diagram of the first sub-processor group, FIG. 19 is a configuration diagram of the second sub-processor group, Fig. 20 is a schematic configuration diagram showing the control circuit of the pulse motor, Fig. 21 is a diagram shown to explain the speed control method of the pulse motor, Fig. 22 is a perspective view of the main part showing the spot light source, and Fig. 23 24 is a side sectional view of the main part showing the spot light source, FIGS. 24 to 26 are plan views shown to explain the operation of specifying the erasing range of an original using the spot light source, and FIG. 27 is a diagram showing the arrangement of the erasing array. Main part O side sectional view shown, 2nd
8 and 29 respectively show the relationship between the erasing array and the photosensitive drum, FIG. 28 is a perspective view showing only the main parts, FIG. 29 is a front view showing only the main parts, and FIG. 30. 3 shows the structure of the erasing array, and FIG.
1rEJ is a circuit configuration diagram showing the configuration of the array drive section, the third
FIG. 2 is a side cross-sectional view of the main parts showing another example of the arrangement of the erasing array. 1...Main body, 2...Original table, P...Paper, 10.
. . . Photosensitive drum, 11 . . . Charger, 121, 12.
...Developer, 28...Double-sided multiple copy unit, 30
a to 30d...operation key, 30e...position specification key, 30f, 30g...erasure range specification key, 30h...
・Multiple copy specification key, soi...Double-sided copy specification key,
sol... Edit designation key, 411... First carriage, 71... Main processor group, 131... Spot light source, I32... Light emitting element, 133... Lens, 135... Pulse etc. 150... Erasing array, 152... Light emitting element, 153... Lens, 160
...Array drive unit, 140...Memory, Ph...
Exposure section. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2 (a) (b) Figure 2 (c) (d) (e) Figure 3 (a) (b) Figure 3 Figure 17 Figure 12 Figure 13 (a) (b) 28fz 28a Figure 13 (C) (d) 8a Figure 14 Figure 15 (a) Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 221 Figure 23 Figure 24 Figure 25 (a) JUe) ;jL) 9 Blade Figure 25 Figure 26 (a) (b) Figure 27 Figure 32

Claims (3)

[Claims] (1) The document placed on the document table is optically scanned by a scanning means that moves along the document table, and a reflected light image from the document is formed on a charged image carrier. In an image forming apparatus that forms an electric charge pattern, develops the electric charge pattern, and then transfers and fixes the electric charge pattern to a transfer material to form an image, a moving means for moving a reflected light image from a document formed on the image carrier. a plurality of developing means each having a developer of a different color and selectively operated to develop the residual charge pattern on the image carrier; a conveying means for conveying the document to a document; a specifying means provided in the scanning means for specifying an arbitrary range of the document using transmitted light; and an erasing means for erasing an image within or outside the specified range during image formation; The erasing means erases an image corresponding to the first range of the original specified by the specifying means, an image is formed on a transfer material using the one developing device, and the image is transferred to the transfer material by the conveyance means. The image is conveyed to the carrier side, and the eraser erases the image of the portion other than the designated range on the same surface of the conveyed transfer material to the part corresponding to the second range of the document designated by the designation means. an image forming apparatus comprising: a control means for forming an image in the first range in which the first range has been erased on a transfer material using the other developing device. (2) The instruction means is provided in the scanning means, is movable in a direction perpendicular to the moving direction of the scanning means, and comprises a light emitting element and a lens that irradiates a spot light onto the document surface. The image forming apparatus according to scope 1. (3) The erasing means is arranged in the vicinity of the image carrier along the longitudinal direction of the image carrier, and includes a plurality of light emitting elements whose lighting is controlled according to the range indicated by the indicating means. An image forming apparatus according to claim 1.