JPS61143782A - Image forming device - Google Patents

Abstract

PURPOSE:To obtain a desired image by enlarging (reducing) the image of an original assigned in a prescribed range and forming the same to the part assigned in the next range thereby erasing, enlarging, reducing and moving selectively the optional part of the original image. CONSTITUTION:The operator operates keys 30a-30d and position assigning key 30e of an operation panel 30 and assigns a range E1 by spots S1, S2 and a range E2 by S3, Sr. The original G is set on the basis of the central part Gc of a stationary scale 21 as reference. The sizes in the directions x, y of E1, E2 are determined from the coordinate positions of S1-S4 and a copying magnification is determined in a main processor group 71 when the operator pushes an edition assigning key 30h. The image of the part E1 is then erased. The images except the part assigned by E2 on a photosensitive drum are erased in conformity with the operation timing of a carriage, etc. and the image assigned by E1 is enlarged and formed within E2.

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]

Generally, an electronic copying machine has a function of copying an original image onto paper as is, or enlarging or reducing the original image and making a copy.

By the way, there are unnecessary parts and enlargements in the original image.

There may be parts that you want to reduce. However, conventional copying machines cannot partially (erase, enlarge, or reduce) a document image and copy it.

[Purpose of the invention]

This invention was made based on the above circumstances, and its purpose is to selectively erase, enlarge, or reduce any part of an original image.

The present invention aims to provide an image forming apparatus that can move and form images.

[Summary of the invention]

This invention includes, for example, a function for multiple copying of a document, a function for specifying an arbitrary range of a document, a function for erasing images within and outside the specified range, and an enlargement function.

By using the function of reducing and moving the center of the copied image, the image of the original specified in the range '1IC1 can be enlarged or reduced and formed in the part specified in the second range.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

3 and 4 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. This document table 2 is provided with a fixed scale 21 that serves as a reference for placing the document, and furthermore, a document cover I which can be opened and closed is provided near the document table 2! and a work table 12 are provided. The paper set on the document table 2 is moved back and forth by an optical system consisting of an exposure lamp 4 and a mirror 5.6°7 reciprocating along the lower surface of the document table 2 in the direction of the arrow. It is designed to be exposed and scanned at times. In this case, mirror 6.7 moves at the same speed as mirror 5 so as to keep the optical path length constant. The light reflected from the document by the scanning of the optical system, and the light reflected from the document by the light irradiation of the 1P exposure lamp 4 are reflected by the above-mentioned Mi7-s, 6.
After being reflected by the lens y, it passes through the variable magnification lens 8, and is further reflected by the mirror 9 to the photosensitive drum 1.
0, so that an image of the document is formed on the surface of the photosensitive drum 10.

The photosensitive drum 10 rotates in the direction of arrow C (the surface is first charged by the charger 11, and then the image of the document is exposed to slit light to form a silent image, and this electrostatic latent image is The toner is applied by the developing device 12 to make it visible.

On the other hand, the paper (image forming object) P is sent out from the selected upper paper feed cassette 13 or lower paper feed cassette 14.
-yxs or 16, the sheets are taken out one by one, guided through a paper guide path J7 or No8 to a pair of registration rollers 19, and sent to a transfer section by this pair of rollers 19. Here, each of the above paper feed cassettes 13 and 14
is provided with a removable pressure at the lower right end of the main body l,
Either one can be selected in the operation/four channels described later.

Note that each of the paper feed cassettes 13. J4 is a cassette size detection switch, and the cassette size is detected by J501*6'2. This detection switch is Te50
1*602 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 sent to the transfer section comes into close contact with the surface of the photoreceptor drum 10 at the transfer charger 20, so that the toner image on the photoreceptor drum 10 is formed by the action of the charger 20. transcribed. The transferred paper P is peeled off from the photoreceptor drum 10 by the action of the peeling charger 21 and conveyed on the conveyor belt 22, and sent to a pair of fixing rollers 23 as a fixing device provided at the terminal end of the conveyor belt 22. By passing through this area, the transferred image is fixed. After fixing, the paper P is discharged to a tray 25 outside the main body 1 by a pair of discharge rollers 24°604. After the photosensitive drum 10 has been transferred, the static electricity is removed by a charger 26, and residual toner on the surface is removed by a cleaner 27.
Furthermore, the afterimage is erased by the static elimination lamp 28, and the image returns to the initial state. Note that 29 is a cooling fan for preventing the temperature inside the main body 1 from rising.

Further, at the bottom of the main body 1, there is provided a multiple copying unit, Toro Qs, which is used during editing and copying as will be described later. This multiple copy unit, ) 60. In order to make further copies on the same side of the paper that has already been copied, the paper sent out by the paper ejection roller pair 24 is transferred to the registration roller pair 9.
I'll return it to you. That is, this multiple copying unit 603
A gate 60s for sorting is provided inside the paper discharging roller pair 24 and 604. This distribution is gate 60
s is in the state shown by the solid line during normal copying, and is operated as shown by the dotted line during copying of the 1A collection, and the paper sent out by the pair of paper ejection rollers 24 is transferred to the conveyor belts 606, 60, . It is designed to guide you between the two. These conveyor belts 60
．． ．． 60. conveys the paper by nipping it, and guides the guide path 60. The paper introduced into this guide path 60s is sent to the photosensitive drum 10 again in synchronization with the optical system.

FIG. 5 shows the control knob 30 provided on the main body. 30. is a copy key that commands the start of copying, 30
．． is a numeric keypad for setting the number of copies, etc.; 3Q3 is a display unit that displays the operating status of each part, paper size, etc.;
4 is the upper row.

A cassette selection key selects the lower paper feed cassettes 13 and 14, 30s is a cassette display section that displays the selected cassette, and 3Q6 is an enlargement of the copy.

Magnification setting key 307 for setting the reduction magnification in a predetermined relationship
is a zoom battle that sets the magnification and reduction magnification steplessly - 130
8 is a display section for displaying the set magnification, 30s is a density setting section for setting copy density, 30&, 30b, 30c, 3
0d is a spot ``+:'' which indicates the erasing position of the original, which will be described later, an operation key for moving the source, 30@ is a position designation key for inputting the coordinate position indicated by the light source, and 30f.

3og is an erase range specification key that specifies the erase range at each specified position, and 30h is an edit specification that enlarges or reduces the area specified by the sub and to light sources to the area specified by the spot light source and copies it. This is the key.

FIG. 6 shows an example of the drive sources for each drive section of the copying machine constructed as described above, and is composed of the following motors. That is, numeral 3 is a lens motor, which is a motor for moving 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 7-6.7 for zooming. 3
3 is a scanning motor, which connects the exposure lamp 4 and mirror 5;
, a motor for moving the mirror 6.7 for document scanning. 34 is a shutter motor, and a shutter (not shown) is used to adjust the chamber width by charging the photosensitive drum 10 during zooming. #It is a motor for moving. A developing motor 35 is a motor for driving the developing row 2 of the developing device 12 and the like. A drum motor 36 is a motor for driving the photosensitive drum 10. A fixing motor 37 is a motor for driving the paper transport path 22, the pair of fixing rollers 23, and the two pairs of paper discharge rows 24. 38 is a paper feed motor;
This is a motor for driving the output o-5ts and te. 39 is a paper feed motor, which is connected to the pair of Reno rollers 1.
This is a motor for driving 9. Reference numeral 40 denotes a 7A motor, which is a motor for driving the cooling fan 29;
01 is the conveyor belt 606.60. This is a motor for driving.

FIG. 7 shows a drive machine for reciprocating the optical system.
- indicates. That is, the mirror 5 and the exposure lamp 4 are supported by the first carriage 11, and the mirror 6.7 is supported by the second carriage 42. - 4/2 is guided by guides 421 + 422 and can move freely in parallel in the arrow & direction. That is, the four-phase/IP 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 canopy 411 that supports the mirror 5 is fixed to a midway portion of the belt 45.

On the other hand, two pulleys 47° 47 are rotatably provided on the guide portion 46 of the rail 422 of the second barrel 422 supporting the mirror 6.7, spaced apart in the axial direction of the rail 422. A wire 48 is strung between the gouries 47 and 47.

One end of this wire 48 is fixed to the identification part 49, and the other end is fixed to the fixing part 49 via a coil spring 50, respectively. Further, one end of a Kl caliper 411 is fixed to the middle part of the wire 48. Therefore, 1
When the four-wheel motor 33 rotates, the belt 45 rotates and the first cannon 411 moves, and the second cannon 412 also moves accordingly. At this time, pulley 4
7. Since 47 acts as a movable pulley, the first
The second cylinder 4/2 moves in the same direction as 11 at a speed of A.

In addition, 1. The moving direction of the second barrels 411 +412 is controlled by switching the rotation direction of the pulse motor 33.

Further, on the document table 2, a copyable range corresponding to the specified paper is displayed. That is, the paper size specified by the paper selection key 304 is set as (Px, P,), and the magnification setting key 30. ．． If the copying magnification specified by 30° is K, then the copyable range (x, y) is x = P/K y = Py/. Of this copyable range Cx, y), the X direction is indicated by the pointer 51°52 disposed on the back side of the document table 2, and the X direction is indicated by the M1 carry, 41! It is displayed by a scale 53 provided on the top surface of the screen.

As shown in FIG. 8, the above-mentioned pointers 51.
55 via a spring 56. The pulley 55 is rotated by a motor 58;
The distance between the hands 51 and 52 can be changed by being driven according to the paper size and magnification.

The first barrel 411 is moved to a predetermined position (home position according to the magnification) by driving the motor 33 according to the paper size and magnification.Then, when the copy key 301 is pressed, 1st
The carriage 411 is first moved toward the second carriage 411, and then the lamp 4 is turned on and moved away from the second carriage 42.

When scanning of the original is completed, rung 4 is turned off and the first
Carry, Ji4 no Sumire is returned to the home position.

FIG. 9 shows the drive mechanism of the zoom lens unit 8. As shown in FIG. The motor 31 rotates a lead screw 6 disposed along the moving direction (y direction) of the first gear 4i1. When the lead screw 5 is rotated, the board 62 is moved in the X direction.The other end of the board 62 has a joid member 621. 9, this guide member 621 is slidably engaged with the guide rail 64. Also, the board 62 is movable in the direction perpendicular to the board 62 (X direction), and the A movable body 65 is provided to which a lens holder 8 is attached.

That is, supports 65. ．． 65
．． is provided, and this support 65. ．． Reference numeral 652 denotes guide members 661, 60, . . . provided on the substrate 62. Guided and held by. Moreover, the support body 65! A rack 65. There are 6 spacious racks
53 is a motor 67 provided on the board 62.
A pinion 68 rotated by is engaged with the pinion. Therefore, the variable power lens unit 8 is moved in the x direction by driving the motor 67. In addition, micro switch 691.69. are the board 62 and the moving body 65, respectively.
This is to detect the initial position of.

Next, the relationship between the operation of the zoom lens pro 8 and the image formed will be explained. In FIG. 10 (,), the focal length of the variable magnification lens 8 is f, the optical path length from the document table 2 to the lens 8 is y, and from the lens block 8 to the photoconductor 10. If the optical path length at ``!'' is yl and the total path length from the document table 2 to the photosensitive drum IQ is yc, the optical formula is expressed as follows.

Also, the magnification ni=1 and y.

It is expressed as Since the focal length f of Lens Pro 8 is constant, the total optical path length y is required to focus when changing the magnification.
It turns out that we not only have to change yo, but we also have to change y, or y. This 7. l 7. can be changed by moving the lens in the IJty direction. Further, the total path length yc can be changed by moving the second cylinder 472 and changing the positions of y-e and y.

On the other hand, as shown in FIG. 10(b), the distances between the document table 2, the lens pro, the lens 8, and the photosensitive drum 1o are fixed, and the lens pro and the lens 8 are moved in the X direction by a distance Xi, for example. When moving, the image on the photoreceptor drum No. 0 moves at a distance X! expressed by the following equation. will be moved only.

i y.

Also, in the case of full-size copies! ! =2X+. In this way, by moving the lens pro 8 in the X direction, the center of the copied image can be moved.

Figure 811 shows the overall control circuit, which includes the main processor group 71 and the first . It is mainly composed of the second nap group α, the group 7z, and the group 73. The main glosses above, group 7, are:
Operation: Gunel 3Q and various switches and sensors, such as the above-mentioned skein.

Size detection switch, Chiro 01.60. Input devices such as 7
5, a high-voltage transformer 76 that detects the input from 5 and drives the various chargers, the static elimination lamp 28, and the cleaner 27.
plate 9 and the fixing roller pair 23.
The heater 231, the exposure run f4, and each of the motors 31 to 40.5g, 67.77, etc. are controlled to perform the copying operation described above, and the spot light source 131, /
It controls the J-Russ motor 135, the erase array 150° array drive unit 1601, the memory 140, etc. to erase unnecessary portions of the document.

Note that the spot light source 13, the nozzle motor 135, the erase array 1501, the array drive unit 160, and the memory 140 will be described later.

Among the above motors 3 to 40.511, motor 35.3
The toner motor 77 that supplies toner to 7.40.401 and the developing device 12 is controlled by the main saw processor group 7 via the motor dryer puff 8.
and 67° 135 are controlled by the first processor group 72 via the /#rus motor P life puff 9, and the motor 3
6.39.38.511 is Noya Rusu Seven-Tadriver l
It is controlled 94 by the second processor group 73 via jQ. Further, the exposure lamp 4 is controlled by the main group 7I via the lamp regierator Elt'', and the heater 23 &
is controlled by the main control unit 7 via the heater control section 82.

Then, the main process, number 1 from group 7. Commands to drive and stop each motor are sent to the second sub-process group 72, 73, and the first sub-process. Statuses indicating all driving and stopping states of each motor are sent from the second sub-processor group 72, 73 to the main processor group 7. Further, the first processor group 72 receives position information from a position sensor 83 that detects the initial positions of the motors 3 to 34, 67, and z35.

FIG. 12 shows an example of the configuration of the main program, step #7. That is, numeral 9 is a one-chip microcomputer (hereinafter simply referred to as microcomputer), which detects human input of keys on an operation panel (not shown) and controls various displays through an input/output port 92. Also, microcomputer 91
is expanded by input/output ports 93-96. The input/output port 93 is connected to the high voltage transformer 76, the motor driver 7B, the 7-pressure generator 8, and other outputs, and the input/output port 94 is connected to a size switch for detecting paper size and its low input.
A copy condition setting switch and its low input are connected to the input/output port 95. Note that the input/output port 96 is for an option.

The thirteenth factor shows an example of the configuration of the first sub-processor group 72. In other words, 101 is a microcomputer, which is connected to the main processor and group 7. 102 is a programmable interval timer for controlling the phase switching interval time of the main pulse motor, and when a setting value is set from the microcomputer 101, the count value is set based on the setting value.
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 102. Furthermore, the microcomputer 101 receives position information from the position sensor 83 and is connected to input/output dates 103 and 104.

The input/output port 104 is connected to the motors 31 to 34, 67, 1 through the Noculus motor driver 79.
35 are connected. In addition, the above input/output capo) J 0
3 is used when outputting the status signal of each motor to the main processor group 7.

FIG. 14 shows an example of the configuration of the second sub-processor group 73. That is, ill is connected to the main processor group 71 with my=7. The programmable internogle timer for phase switching interval time control of the 1t2#i/9 motor is set by the microcomputer 111 to count based on it, and ends when the count is out. Output the route. This termination pulse is then latched by the circuit 113, and its output is supplied to the interrupt line and the input/output port input line of the microcomputer Ill.

The input/output port 114 is connected to the microcomputer Ill, and the motors 36.3B, 39.5
8 are connected.

Figure 15 shows the control circuit of the pulse motor, with input/output port 12 (input/output port 1 in Figures 13 and 14).
04,114) is a pulse motor driver Jz
z (Figure 1 (Dz#Russ motor driver 79.80
] is connected, and this ? Luss motor driver vane 2
2. Mother motor 123 (above) 4 motor 31~
34° 36.38, 39.5 &, 67.135)
The windings A, A, B, and B are connected to each other.

Figure 16 shows the speed control method of the 4-Russ motor, (&) is the speed curve of the 4-Russ motor, and (b)
The figure shows the phase switching interval. As is clear from this figure, the phase switching intervals are long at first, gradually shorten, eventually become equal intervals, gradually become longer again, and then stop. In other words, this indicates the through-down and through-down of the pulse motor, starting from the self-starting region, starting up, being used in the high-speed region, and eventually falling down. In addition, tl.

t2...t8 indicate the time of the phase switching interval.

Next, the document image erasing means will be explained.

In FIGS. 17 and 18, a guide shaft 130 is provided along the lamp 4 in the part where the light of the lamp 4 is blocked in the first barrel 411, and this guide shaft 130 has Spot light source I as a means of indicating
J l 2>K is provided movably. This spot light fl, l 31 is as shown in FIG. 18, lJ!
, consists of a light emitting element 132, such as a light emitting diode or a lamp, and a lens 133, which are provided opposite to the stacking platform 2, and the light generated by the light emitting element 132 is passed through the lens 133.
As a result, the document table 2 is irradiated with a spot light f' having a diameter d. This spot light has a brightness that allows it to pass through the original G set on the original platen 2, for example, as thick as a postcard. Further, the spot light source 131 is connected to a timing belt (toothed belt) 134 disposed along the guide shaft 130. 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, by rotating the J system motor 135, the spot light source 13 is moved to the M1 carriage 411.
is moved in a direction perpendicular to the direction of travel. In addition, a first
The carriage 411 is provided with a position sensor 138 consisting of a microswitch that detects the initial position of the spot light source 13. For example, when the spot light source 13 is moved, the spot light source 131 first moves to the position sensor 13B.
The initial position is detected by contacting the

Next, a method for specifying the erasing range of a document using the spot light source 131 will be described with reference to FIGS. 19 to 21. This spot light source 131 is moved by operating the aforementioned operation keys 3Qa to 30d. That is, when the operation keys 30b and 30d are pressed, the motor 33 is driven, and the first gear, the gear 41g, and the spot light source 13 are driven.
1 is moved in the scanning direction (arrow y direction shown in FIG. 19). Also, an operation key 30a.

When 30e is pressed, the motor 135 is driven, and the spot light source 131 is moved in a direction perpendicular to the scanning direction (direction of arrow X shown in FIG. 19).

The operator operates the operation keys 30h to 30d while visually observing the spot light transmitted through the document G. For example, after moving the spotlight to point S1 on the document G shown in FIG. push.

Then, the coordinate position specified by this S is stored in the main group 7 shown in FIG. 811.

Similarly, when the position designation key 30m is pressed with the spotlight moved to 81 points on the original aG, the position of point S2 is stored in the main processor group 7. The position of this spot light can be detected, for example, by driving the nine pulse motors 33, 135 and counting the number of pulses. After this, press the erase range designation key 30ft, and press the (&) button in Figure 20.
As shown in , a rectangular area (indicated by the f+ line) having 82 diagonal points Sl is designated as the erasure range. Also,
As shown in Fig. 20(b), when specifying the 83 point es4 point of the original G and pressing the erase range specification key 30g, the area other than the square with the diagonal point S3*84 point is specified as the erase range. . In this way, erase range specification keys 30t, 30g
When t is pressed, calculations are performed in the main processor group 7 based on the positions of the two specified points, and the memory 14Q receives a high level signal "1" in the erase range area and a low level signal in the other areas. ``'0'' is stored. That is, in this memory 140, for example, the capacity in each column direction is equal to that of the spot light source 1.
The RA whose capacity in each row direction is approximately equal to the moving distance of the spot light source 131 in the X direction divided by the position resolution in the X direction, and the capacity in each row direction is approximately equal to the moving distance in one direction of the spot light source 131 divided by the position resolution in one direction.
If the main process is configured by M, and the data supplied from the main process group 21 is in the case of diagram g20 (1), as shown in diagram 21 (&), and as shown in diagram tJc20 (b ), as shown in FIG. 21(b), a high level signal is stored at the address corresponding to the hatched area, and a low level signal is stored at the address corresponding to the other address.

In this case, the original is set with the copy side facing up, and after specifying the erasure area, the fixed school 2 on the original table 2! It shall be viewed face-to-face along the following lines.

Therefore, the information stored in the menu 140 shown in FIG. 21 is actually stored inverted in the column direction.

On the other hand, as shown in FIG. 22, an erasing play 150 as erasing means is provided close to, for example, between the charger 11 and the exposure section P of the photosensitive drum 10. This erase array 150 is shown in FIG.

As shown in FIG. 24, a plurality of light-shielding cells 151 are arranged in a direction perpendicular to the rotational direction of the photoreceptor drum io, and inside these cells 151 there are the cells shown in FIG. 25(a), respectively.
(b) As shown in K, a light emitting element 152 made of, for example, a light emitting diode is provided. In addition, a light emitting element 152 is provided in the opening of each cell 151 facing the photoreceptor drum IQ.
lens J5J that focuses the light on the surface of the photoreceptor drum 10
is provided. The number of light emitting elements arranged in this erasing array 150 is matched, for example, with the capacitance of the mesh 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 erase play 150 is Q==NXP.

The erase play 150 is driven by the play drive section 160 described above. This 26th drive unit 1601d
As shown in the figure, a shift register 16 having the same number of bits as the number of bits in the column direction of the memory 140, a store register 162 that holds the contents of this shift register 16, and each output signal of this store register 162. The switch circuit 164 is composed of a plurality of switch elements 3 that are controlled on and off by
The fixed contacts 163b are respectively connected to the cathodes of the light emitting elements (light emitting diodes) 152 constituting the erase array 150t. The seven nodes of each of these light emitting elements tSZ are connected to a power supply vccK via a current limiting resistor R, respectively.

After specifying the erase range of the original as described above, when the original cover 11 is closed and the copy key 301 is pressed, the first carriage 41! As the photosensitive drum 10 is operated, data for one column is sequentially read out from the mesori 140 in the row direction (shown in FIG. 5). The data is transferred to the shift register 161 of the array drive unit 160. After one column of data is transferred to the shift register 161,
The charged portion of the photoreceptor drum 10 forms an erase array 150.
When the signal LTH is reached, the main process group 71 outputs the signal LTH, and the contents of this signal (accordingly, the shift register 6) are supplied to the store register 162.

That is, since the erase play 150 is disposed between the charger 11 and the exposure section Ph, one column of data outputted from the memory 140 is stored at the angle between the erase array 1'50 and the exposure section Ph, for example. is θl and the photoreceptor drum 10 is rotating at an angular velocity ω, then the latch signal LTI(
output timing is controlled.

Each switch element 163 of the switch circuit 164 is controlled by each output signal of this store register 162. That is, 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 163 is turned on when the switch element 63 is on, and is turned off when the switch element 63 is off. Therefore, of the i'8c portion of the photoreceptor drum io, the portion where the light emitting element 152 is turned on is charged, and even if the charged portion is exposed thereafter, a silent IE latent image is not formed, and the original image is erased. This means that this has been done. Thereafter, in the same manner, the memory 140
The data is read out one column at a time, and the image is erased.

The main parts of this invention will be explained in the following. This copying machine can edit and copy images of originals.

In other words, it is possible to move an image of a desired part of a document to another part of the document and copy it.
As shown in FIG. 1, the image of the portion of the document G set on the document table 2 specified in the first range gl is transferred to the second range E2.
It can be moved to and copied.

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

First, the operation keys 30a to 3 of the operation/gunnel 30 described above are pressed.
0d and position specification -? -30, as shown in Figure 2 (,
) As shown in FIG.
Specify. Thereafter, the second range E2 is designated using the spotlight 53eS4 in the same manner as shown in FIG. 2(b).

Original G is fixed scale p2. Since it is set based on the center Gc of #E2, if the range E2 of the first range E1 and #E2 is specified, these first ranges E1 and #E2 are set based on the center Gc of #E2. The center part in the X direction of the second range El +E1 and the fixed scale 2! Distance from center G of
You can know 1mX2. That is, as described above, the first. Second range E 1 * E ! After specifying
Edit designation key JOht - Press to select main gloss, group 7
, the difference ΔX (ΔX"Xi
This corresponds to the distance traveled in the direction. Also, in the main group 7, the coordinate position % of the light S1*S1
83 e 1st from the coordinate position of S4. Second range E
1. E! The X and Y direction dimensions (xo.

Yxl), (mx, yB) are determined, and from these dimensions, F) copying times in the X and y directions, and A are determined. That is, for these copying magnifications, -y
It is calculated as 2 '1.1. Here, if the copying magnifications in the X direction and the y direction are different, the one with the smaller magnification is selected, and the image specified in the first range El is transferred to the second range E! 1001 copies are made.

After that, when the copy key 301 is pressed, the first cartridge 411 etc. are operated, and the first range E is specified by the same operation as when the above-mentioned erasure range specification key SOt is pressed. Copying is performed by erasing the partial image. FIG. M2 (c) shows an image copied onto paper PK in this manner. After the copying is completed, the MP for this is transferred to the conveyor belt 60aa6 of the multiple copy unit 503 described above.
o, and sent to the transfer section again.

During this time, the first cartridge nt1 is returned to its home position, and the variable power lens unit 8 changes to the moving distance ΔX in the X direction and the copying magnification * determined by the main processor group 7, or to It is moved to a predetermined position by a no flat motor 67.31 driven in accordance with the above. Then, the conveyed paper P is fed in synchronization with the operation of the first carry, gear 411, etc., and the photoreceptor is moved by the same operation as when the erase range designation key 30g described above is pressed. As shown in FIG. 2(d) on the drum 10, there is a second area E! The image other than the part specified by is erased, and the image specified by the first range gx is enlarged and formed within this second range E. In this way, the image formed on the photoreceptor drum 10 is spread over the first spinning range El.
is erased on the same side of the paper P and the second range E! An image is formed on this paper P as shown in FIG. 2(,). Paper P on which an image is formed in this way
is discharged onto the tray 25 through the fixing roller pair 23 and the paper discharge roller pair 24.604, and the copying operation is completed.

According to the above embodiment, it is possible to specify and erase an unnecessary part of a document, and also enlarge or reduce the image of the document specified in the first range to erase the part specified in the second range. It can be moved and formed. Therefore, the original image can be edited and copied in various ways, which is extremely advantageous in practical terms.

In addition, since the spot light source 131 is provided on the first scanner 411, space can be used effectively and it is possible to suppress the increase in the number of devices, and a predetermined range of the document can be specified on the document table z. It has good operability.

Incidentally, in the above embodiment, when editing and copying, first the first range E1 is
The specified part is erased and copied, and then the image of the first range El is formed in the specified second range E2. However, the present invention is not limited to this. Erase and copy the specified part of the image, and then copy this second image.
The range of E! An image of the portion specified by the first range E1 may be formed in the portion specified by .

Further, the position of the erasing array 150 is not limited to between the charger 1 and the exposure section Ph as shown in FIG. 22, 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.

Furthermore, the capacity of the memory 140 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.

〔Effect of the invention〕

As described in detail above, according to the present invention, any part of a document image can be selectively erased or enlarged.

An image forming apparatus capable of forming an image by reducing and moving it can be provided.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of an image forming apparatus according to the present invention, and FIG. 2 is a plan view of the main parts shown for explaining the editing and copying operation, and FIG. 2 is a diagram showing for explaining the editing and copying operation. , FIG. 3, and FIG. 4 show the configuration of the image forming apparatus. FIG. 3 is an overview perspective view, FIG. 4 is a side sectional view, and FIG. 5 is a plan view showing the configuration of the operation panel. Fig. 6 is a perspective view showing the structure of the drive section, Fig. 7 is a perspective view schematically showing the drive mechanism of the optical system, Fig. 8 is a perspective view schematically showing the drive mechanism of the pointer, and Fig. 9 is a perspective view schematically showing the drive mechanism of the optical system. A perspective view schematically showing the drive mechanism of the magnification lens block, FIG. 1O is a diagram for explaining the operation of the magnification lens block and the relationship between the image formed, and FIG. 11 is the overall control circuit. Fig. 12 is a block diagram of the main processor group, Fig. 13 is a block diagram of the first sub-processor group, Fig. 14 is a block diagram of the second sub-processor group, and Fig. 15 is a block diagram of the Gurus motor. A schematic configuration diagram showing the control circuit, FIG. 16 is a diagram shown to explain the speed side leg method of the 14-speed motor, FIG. 17 is a perspective view of the main part showing the spot light source, and FIG. 18 shows the spot light source. FIGS. 19 to 21 are side sectional views of the main parts, respectively, and FIG. The side sectional view, FIG. 23, and FIG. 24 each show the relationship between the erasing array and the photosensitive drum! 5,! Fig. 23 is a perspective view showing only the main parts, Fig. 24 is a front view showing only the main parts, and Fig. 2
Figure 5 shows the configuration of the elimination play.
is a side sectional view, and (b) is a partially cutaway front view.
FIG. 26 is a circuit configuration diagram showing the configuration of the array drive section,
FIG. 7 is a side sectional view of the main parts showing another example of the arrangement of the erasing array. DESCRIPTION OF SYMBOLS 1...Copying machine main body, 2...Original table, 10...Photosensitive drum, 30-30d...Operation keys, 30...
・Position specification key, 30f, 30g...Erase range specification key, 30b...Edit specification key, 411...Kai 1 carry, Ji, 603...Multiple copying, To, 7...Main selection key , group, 13... spot light source, 132
... Light emitting element, 133... Lens, 135... Pulse motor, 150... Erasing array, 152... Light emitting element, iss... Lens, 160... Array drive unit, ...Memory, P...Paper, Ph...Exposure section. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Prisoner (a) (b) Second Prisoner (c) (d) (e) Figure 6 @ Figure 8 Figure 13 Figure 14 Figure 18 @. 41゜Figure 20Figure 21 (a) (b) Figure 22

Claims (1)

[Scope of Claims] 1) A 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 transferred to an image carrier to which a charge is applied. In an image forming apparatus that forms an image by forming an image on a material to form a charge pattern, developing this charge pattern, and then transferring and fixing it to a transfer material,
a conveying means for conveying the transferred material on which the image has been formed to the image carrier again; a specifying means provided in the scanning means for specifying an arbitrary range of the document using transmitted light; an erasing means for erasing an image within or outside the range; and an erasing means for erasing an image corresponding to a first range of the original specified by the specifying means to form an image on a transfer material; The material is transported to the image carrier side by the transport means, and the erasing means erases the designated area on the same side of the transported material, which corresponds 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 from which images in areas other than the area are erased; 2) The indication 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 item 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 instructed by the instruction means. An image forming apparatus according to claim 1.