JPS6271979A - Image forming device - Google Patents

Abstract

PURPOSE:To change the arrangement of an original image to copy the image by moving a variable power lens block e.g. in the vertical direction to the carrying direction of an original. CONSTITUTION:When a copy key 301 is depressed, a main processor group 71 drives pulse motors 31, 67 in accordance with a moving distance XL in the x direction to move the variable power lens block 8 to a prescribed position, i.e. from a point A to a point B. Consequently, the 1st carriage 411 and a photosensitive drum 10 are driven, data of one row are successively read out in the line direction from a memory 140 and the image specified by the 1st range E1 is enlarged and formed in the range E2 on the photosensitive drum 10. Thus, the image formed on the drum 10 is transferred to the 2nd range E2 part.

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 front 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 times when you want to copy an original image as it is, or after enlarging or reducing it and moving it to a different position on the original, but with conventional copying machines, it is possible to copy the original image in a horizontal direction with respect to the conveying direction of the paper. This can be done by changing the paper feeding timing, but it is not possible to change the arrangement of the original image in the vertical direction and copy it.

[Purpose of the invention]

This invention has been made in view of the above circumstances, and its purpose is to change the arrangement of the original image in the direction perpendicular to the conveying direction of the transfer material and to make copies at various magnifications. It is an object of the present invention to provide an image forming apparatus that can be used for image editing and the like.

(Summary of the Invention) The present invention is capable of copying by changing the arrangement of an original image by, for example, making a variable magnification lens block movable in a direction perpendicular to the conveying direction of the original. be.

[Embodiments of the invention]

Hereinafter, a practical example of the present invention will be explained with reference to the drawings.

FIGS. 10 and 11 schematically show an image forming apparatus of the present invention, such as a copying machine.

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 2 which serves as a reference for setting the document, and roughly in the vicinity of the document table 2 is provided a document cover 11 and a work table 12 which can be opened and closed.

The original placed on the original platen 2 is moved back and forth by an optical system consisting of an exposure lamp 4 and mirrors 5, 6, and 7 along the lower surface of the original platen 2 in the direction of arrow a. It is designed to be exposed and scanned. In this case, mirror 6.7 moves at half the speed of mirror 5 so as to maintain the optical exposure length. The light reflected from the original by the scanning of the optical system, that is, the light reflected from the original by the light irradiation of the exposure lamp 4 is reflected by the mirror 5.6.7, passes through the variable magnification lens block 8, and further passes through the mirror 91. .92
．． 93 and guided to the photosensitive drum 10,
An image of the original is formed on the surface of the photosensitive drum 10.

The photosensitive drum 10 rotates in the direction of the arrow C in the figure, and the surface is first charged by the charging device 11, and then the image is exposed to slit light, so that the surface becomes static! A latent image is formed. This electrostatic latent image is made into a visible image by being deposited by developing devices 121 and 122, each of which contains red or black toner, and which is selectively operated according to the director. There is.

On the other hand, the paper (transferring material) P is delivered from the selected upper paper feed cassette 131, middle paper feed cassette 132, or lower paper feed cassette 133 to the feed rollers 141, 142, 14.
3 and Row 5 pairs 151, 152, 153, the sheets are taken out one by one, guided through the paper guide path 161, 162, 163 to the registration roller pair 17, and guided by the registration roller pair 17 to the transfer section. It has become. Here, the paper feed cassettes 131, 132, 13,
3 is removably provided at the lower right end of the main body 1, and either one can be selected on the operation panel described later. Note that each of the paper feed cassettes 131.
The cassette sizes of 132 and 13i are detected by cassette size detection switches 601, 602, and 603, respectively. This cassette size detection switch 6
01.602.603 is composed of a plurality of microswitches that are turned on and off according to the insertion of cassettes of different sizes.

The paper P sent to the transfer section comes into close contact with the surface of the photoreceptor drum 10 at the transfer charger 18, so that the toner image on the photoreceptor drum 10 is transferred by the action of the charger 18. . This transferred paper P is transferred to the peeling charger 1
The transferred image is electrostatically separated from the photoreceptor drum 10 by the action of step 9, is conveyed by a conveyor belt 20, and is sent to a fixing roller 21 as a fixing device provided at the end of the conveyor belt. It will be established. Then, paper P after fixing
The pair of delivery rollers 22 operates as shown by the solid line. Further, the photosensitive drum 10 in the transfer section is returned to its initial state by having residual toner on the surface removed by a cleaner 26 and residual images being erased by a static elimination lamp 27. Note that 29 is a cooling fan for preventing the temperature inside the main body 1 from rising.

On the other hand, a multiple copying unit 28 is provided below the copying machine main body 1 to make it possible to copy both sides of a sheet of paper or to make multiple copies on the same side. This unit 28
In addition, the above-mentioned sorting is done by the gate 23, the paper ejection roller pair 24, and the sorting is done by a plurality of roller pairs 28b, 2, which guide the sheets taken in by the gate 23 to the stacking section 28a.
8c and 28d are provided. In addition, the accumulation section 28
A delivery roller 28e is provided at a to send out the paper temporarily stored in the stacking section 28a. This delivery roller 2
8e can be moved up and down as shown by the arrow in the figure, depending on the thickness (number of sheets) of the stored paper. Delivery roller 28
The paper sent out by e is guided to the control gate 28Q via a pair of separation rollers 28f that separates the paper sheets one by one and sends them out.

When multiple copying is to be performed, the control gate 28g is rotated in the direction of arrow M in the figure to guide the paper to the registration roller pair 17 via the paper guide path 281 of the transport roller pair 28h1. Further, when double-sided copying is to be performed, the state shown in the figure is used, and the paper is guided to the reversing section 28 via a pair of conveying rollers 28j. The paper is inverted at 28
k, the control gate 2BQ is rotated in the direction of the arrow T shown in the figure, and guides the paper sent by the pair of transport rollers 28j to the pair of registration rollers 17 via the pair of transport rollers 28h1 and the paper guide path 281. done to. In this embodiment, the control gate 28Q is always rotated in the direction of arrow M in the figure, and only multiple copying is possible.

FIG. 12 shows the operation panel 30 provided on the main body 1. 301 is a copy key for commanding the start of copying; 30
2 is a numeric keypad for setting the number of copies, etc.; 303 is a display section for displaying the operating status of each part and paper jams; 304 is a cassette selection key for selecting the upper and lower paper feed cassettes 13 and 14; 30s is a selected key. A cassette display section for displaying the cassette, 306 a magnification setting key for setting copy enlargement and reduction magnification in a predetermined relationship, 307 a zoom key for steplessly setting the enlargement and reduction magnification, and 308 for displaying the set magnification. a display section; 309 is a density setting section for setting the copy density; 30a, 30b, and 30C130d are operation keys for moving a spot light source for instructing the erasure position of the original, the moving range and destination of the original, which will be described later; and 30e
is a position specification key for inputting the coordinate position indicated by the spot light source, 3or and 30a are erase range specification keys for specifying the erase range at the specified position, and 30h is for inputting the image in the range specified by the spot light source using the same spot light source. This is an edit specification key that specifies the edit mode for copying to a specified range as is, or enlarging or reducing it.

FIG. 13 shows an example of the drive source configuration of each drive unit of the copying machine configured as described above, and is composed of the following motors. That is, 31 is a lens motor,
This is a motor for moving the position of the lens block 8 for zooming. Reference numeral 32 denotes a mirror motor, which connects the mirrors 5 and 6 to change the magnification.
．． This is a motor for changing the distance (optical path length) between the two. 33 is a scanning motor, and the exposure lamp 4
and a mirror 5, and a motor for moving the mirror 6.7 for document scanning.

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 11 during zooming.

351 and 352 are developing motors, respectively, for the developing device 1.
This is a motor for driving the phenomenon rollers 21 and 122. , 36 is a drum motor, which is a motor for driving the photosensitive drum 10. 37 is a fixing motor, which connects the paper conveyance path 20 and the fixing roller pair 21.
and a motor for driving the paper ejection roller pair 24. 38 is a paper feed motor, which connects the feed roller 14 to
This is a motor for driving 143. Reference numeral 39 denotes a paper feed motor, which is a motor for driving the registration roller pair 17.

40 is a fan motor, which is a motor for driving the cooling fan 29; 401 is an O-L pair 28b, 28c;
, 28d, etc.

FIG. 14 shows a drive mechanism for reciprocating the optical system. That is, the mirror 5 and the exposure lamp 4 are supported by a first carriage 411, and the mirrors 6 and 7 are supported by a second carriage 422, respectively, and these carriages 411 and 412 are guided by guide rails 421 and 422 in the direction of arrow a. It can be moved in parallel. That is, the four-phase pulse motor 33 drives the pulley 43.

A timing belt (endless belt) 45 is stretched between the pulley 43 and the fiddle 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. As described later, the timing belt 45 has round teeth.

On the other hand, two pulleys 47.47 are rotatably provided in the guide portion 46 of the second carriage 422 that supports the mirror 6.7 and are spaced apart in the axial direction of the rail 422. A wire 48 is strung around.

One end of this wire 48 is fixed to a fixed part 49, and the other end is fixed to the fixed part 49 via a coil spring 50. Further, one end of a first carriage 411 is fixed to a midway portion of the wire 48. Therefore, as the pulse motor 33 rotates, the belt 45 rotates, the first carriage 411 moves, and the second carriage 422 also moves accordingly. At this time, since the pulleys 47 and 47 serve as movable W4 wheels, the second carriage 422 moves in the same direction as the first carriage 411 at 1/2 the speed. Note that the moving directions of the first and second carriages 411 and 412 are 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. In other words, cassette selection key 3
If the paper size specified by 04 is (Px, Py) and the copy magnification specified by the magnification setting keys 306 and 307 is K, then the copyable range (X%y), ``x-
Px/Kl.

rV-PV/KJ. This copyable range (X, y)
In the X direction, a pointer 51 provided on the back side of the document table 2
．． 52, and the X direction is indicated by a scale 53 provided on the upper surface of the first carriage 411.

The above pointers 51 and 52 are connected to the pulley 5 as shown in FIG.
4.55 via spring 56! i) It is provided on the wire 57 which has been connected. The pulley 55 is rotated by a motor 58, and by driving the rotation of the motor 58 according to the paper size and magnification, the distance between the pointers 51 and 52 can be changed. There is.

Further, the first carriage 411 is moved to a predetermined position by driving the motor 33 according to the paper size and magnification.
(home position according to the magnification). Then, when the copy key 30 is pressed, the first
The carriage 411 is first moved toward the second carriage 412, and then the lamp 4 is turned on and the carriage 411 is moved away from the second carriage 412. When scanning of the original is completed, the lamp 4 is turned off and the first carriage 411
is returned to the home position.

FIG. 1 shows a drive mechanism for the variable magnification lens block 8. As shown in FIG. The motor 31 rotates a lead screw 61 disposed along the moving direction (X direction) of the first carriage 411. This lead screw 61 has a bushing 6 provided at one end of the board 62.
31 and 632 are screwed together, and the lead screw 61
When the is rotated, the substrate 62 is moved in the X direction.

A guide member 621 is provided at the other end of the substrate 62, and the guide member 621 is slidably engaged with the guide rail 64. Further, the substrate 62 includes a substrate 62 .
A movable body 65 is provided, which is movable in a direction (X direction) orthogonal to the above, and to which the variable magnification lens block 8 is attached. That is, supports 65+ are provided at both ends of this moving body 65.
, 652 are provided, and this support 651.652
are guided and held by guide members 66s and 662 provided on the substrate 62. Further, a rack 653 is provided on the side surface in the longitudinal direction of the support body 651, and a shaft 68 rotated by a pulse motor 67 provided on the base plate 62 is engaged with this rack 653. Therefore, the lens block 8 for variable magnification is controlled by the motor 6.
7 is driven, it is moved in the X direction. Note that the microswitches 691 and 692 are for detecting the initial positions of the substrate 62 and the moving body 65, respectively.

Next, the relationship between the operation of the variable magnification lens block 8 and the image formed will be explained. In FIG. 2(a), the focal length of the variable power lens block 8 is f, the optical path length from the document table 2 to the variable power lens block 8 is ya, and from the variable power lens block 8 to the photosensitive drum 10. The optical path length of y
b, the total optical path length from the document table 2 to the photoreceptor drum 10 is y
c, the optical formula is expressed as follows.

1/f=1/Va+1/yb Moreover, the magnification M is expressed as M-Yb/Va. Since the focal length f of the variable power lens block 8 is constant, it is understood that in order to focus during variable power, it is necessary not only to change the total optical path length yc but also to change ya or yb. This ya, yb
can be changed by moving the variable power lens block 8 in the y direction. Further, the total optical path length yc can be changed by moving the second carriage 412 and changing the position of the mirror 6.7.

On the other hand, as shown in FIG. 2(b), the distances between the document table 2, the variable magnification lens block 8, and the photosensitive drum 10 are kept constant, and the variable magnification lens block 8 is moved by the motor 67 in the X direction, for example, by a distance. x (If you move by 1, the photosensitive drum 10
The upper image is moved by a distance Xo given by:

Xo=Xa ・M Xo = (1+M) e xL to xt, -(M/1+M) ・Xo
−(1).

As a result, when the movement ffi X O on the document table 2 is set, the main processor group 71 executes
By calculating the movement amount XL of the variable power lens block 8, and driving the motor by this movement IxL, the variable power lens block 8 is moved from point A as shown in FIG. Move to point 8.

Further, the movement IXL of the variable magnification lens block 8 is not only mechanically restricted, but also limited by the practical amount of movement due to the detection of the resolution of the variable magnification lens block 8.

On the other hand, the movement IXL of the variable magnification lens block 8 is limited in the amount of movement depending on the magnification, and when calculating the diameter lll@, the main processor group 71 determines whether the moving layer is within the movable range. It is determined whether

For example, the amount of movement is limited depending on the magnification as shown in FIG.

Also, when performing normal copying, as shown in Figure 4,
The configuration is such that images at both ends of the document table 2 are formed on both ends of the photoreceptor drum 10.

Here, when the reduction or zooming lens block 8 is moved, non-image areas are generated at both ends of the photoreceptor drum 10.

For example, the width of the document table 20 is (OXLMT), the width of the photoreceptor drum 10 is (CXLMT), the magnification is M1, the moving amount of the image is (Dx: photoreceptor drum surface), and the starting position of the non-image area is (CX B OT M, CXCE I L)
Then, when point X on the document table 2 is projected onto the photoreceptor drum 10, the distance Cx from the end of the photoreceptor drum 10 is cx-M(X-Co)+Cn+Dx.

(Co: the position on the document table 2 that is the center of magnification when there is no image movement, CX: the projection point of the photoreceptor drum 10 relative to the position on the document table 2 that is the center of magnification when there is no image movement ) becomes.

That is, the projection point CX 80 of the point x-0 on the document table 2
TM Ha, CXBOTM--M*Ca +Go +Dx Tonal. When CXBOTM>0(7), the area from x-CXBOTM to x-Q becomes a non-image area.

Furthermore, the projection point CXCEIL of the maximum value X-X-0XL on the document table 2 is CXCEIL=M (OXLMT-Co)+Co
+Dx. Here, when CXCE I L<CXLMT,
The area between x-CXCEIL and X-CXLMT becomes a non-image portion.

For example, if the original size on the original platen 2 - the size of the photoreceptor drum 10, the center of magnification - (the center of the original) = (the center of the photoreceptor drum 10), then OXLMT - CXLMT, Go - CD = (OXLMT> ÷ 2- (CXL
MT) ÷ 2, CXBOTM = (Dx + drum length/2) - (document glass size/2xM/100) = (Dx + Co) - (Go XM/100) CXCE I L- (Ox + drum length/2) + (Original table size/2XM/100) - (Dx + Go) + (Go XM/100).

FIG. 16 shows the overall control circuit, showing the main processor group 71 and the first . Second sub-processor group 72.
It is mainly composed of 73. Main processor group 7 above
1 includes an operation panel 3o and various switches and sensors, such as the cassette size detection switch 60z, 602.
A high voltage transformer 76 that detects input from an input device 75 such as 603 and drives the various chargers, the static elimination lamp 27, the blade solenoid 26a of the cleaner 26,
The heater 21a of the pair of fixing rollers 21, the exposure lamp 4, each of the motors 31 to 40.58, etc. are controlled to perform the copying operation described above, and the spot light source 1
31, the pulse motor 135, the memory 140, the erasing array 1501, the array driving section 160, etc. are controlled to erase unnecessary portions of the document.

Among the above motors 31 to 40.58.135, motor 3
51.352.37.40, 40t and developer 121
．． Toner motor 77.77 that supplies toner to 122
The motors 31 to 34, 135, and 181 are controlled by the first sub-O setter group 72 via a pulse motor driver 79, and the motors 36, 39, . 38.58 is controlled by the second sub-processor group 73 via the pulse motor driver 80. Further, the exposure lamp 4 is controlled by the main processor group 71 via the lamp regulator 81, and the heater 21a is controlled by the main processor group 71 via the heater control section 82. Then, from the main processor group 71, the first. 2nd subprocessor group 72.73
Commands to drive and stop each motor are sent to the first motor. From the second sub-processor group 72 and 73 to the main processor group 71
A status signal indicating the drive/stop state of each motor is sent to the motor. Further, the first sub-processor group 72 receives position information from a position sensor 83 that detects the initial positions of the motors 31 to 34.135.

FIG. 17 shows an example of the configuration of the main processor group 71. That is, 91 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 via an input/output board 92. Also, microcomputer 91
is expanded by input/output ports 93-96. A high voltage transformer 76, a motor driver 78, a lamp regulator 81, and other outputs are connected to the input/output boat 93, and a size switch for detecting paper size and other inputs are connected to the input/output boat 94.
A copy condition setting switch and other inputs are connected to the input/output boat 95. Note that the input/output port 96 is an option.

FIG. 18 shows an example of the configuration of the first sub-processor group 72. That is, 101 is a microcomputer, which is connected to the main processor group 71. 102 is a programmable interval timer for controlling the phase switching interval time of the pulse motor, and when a set value is set from the microcomputer 101, it counts based on it, and when it has counted out, it sends an end pulse to the interrupt line of the microcomputer 101. Output. 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 boats 103 and 104.

The input/output boat 104 is connected to the motors 31 to 34.135 via the pulse motor driver 79. The input/output board 103 is used, for example, to output status signals of each pulse motor to the main processor group 71.

FIG. 19 shows the configuration of the second sub-processor group 73. That is, 111 is a microcomputer, which is connected to the main processor group 71.

112 is a programmable interval timer for the phase switching interval time system of the pulse motor;
By setting a set value from 1, it counts based on it, and outputs an end pulse when the count is out. This end 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. Further, an input/output boat 114 is connected to the microcomputer 111, and motors 36, 38, 39, and 58 are connected to this output port 114 via the pulse motor driver 80.

Figure 20 shows the control circuit of the pulse motor.
The input/output boat 121 (corresponding to the input/output boats 104 and 114 in FIGS. 18 and 19) has a pulse motor driver 1.
22 (corresponding to the pulse motor driver 79.80 in FIG. 16) is connected to the pulse motor driver 122,
．． 38.39.58.135.181)
lA, 8. A and B are mWt.

Figure 21 shows a method of controlling the speed of a pulse motor, where (a) is the speed curve of the pulse motor, and (b) is the speed curve of the pulse motor.
The figure shows the phase switching interval. As is clear from this figure, the phase switching interval is initially long, gradually shortens, eventually becomes equal, becomes gradually longer again, and then stops. That is, this indicates the slew-up and slew-down of the pulse motor, starting from the self-starting region, being used in the high-speed region, and finally falling down. In addition, tl, tl
...tx indicates the time of the phase switching interval.

Next, the document image erasing means will be explained.

In FIGS. 22 and 23, a guide shaft 130 is provided in the first carriage 411 along the lamp 4 in the part where the light of the lamp 4 is blocked, and this guide shaft 130 has a guide shaft 130 that is used to mark the erasing range of the document. Spot light source 1 as a means of giving instructions
31 is movably provided. This spot light source 1
As shown in FIG. 23, reference numeral 31 includes a light emitting element 132, such as a light emitting diode or a lamp, and a lens 133, which are provided opposite to the document table 2.
The light generated by the lens 133 is irradiated onto the document table 2 as a spot light having a diameter d. This spot light has a brightness that allows it to pass through the document G set on the document table 2, which is, for example, as thick as a postcard. Further, the spot light source 131 is a timing belt (toothed belt) 13 disposed along the guide shaft 130.
It is connected to 4.

This timing belt 134 is connected to a pulley 136 and a driven pulley 137 provided on the rotating shaft of a pulse motor 135.
Tonikake has been handed over. Therefore, the pulse motor 13
5 is rotated, the spot light source 131 becomes the first
The carriage 411 is moved in a direction perpendicular to the scanning direction. In addition, a spot light source 13 is mounted on the first carriage 411 located at the end of the guide shaft 130 on the pulse motor 135 side.
A position sensor 138 consisting of a microswitch that detects the initial position of 1 is provided. For example, spot light source 1
31 is moved, first, the spot light 3!131 comes into contact with the position sensor 138, and the initial position is detected.

Next, a method for specifying the erasing range of the document using the spot light source 131 will be explained using the 24th factor to FIG. 26. This spot light source 131 is activated by operating the light emitting element 132 by operating the operation keys 30a to 30d described above.
will be moved while the is lit. That is, the operation key 30
When b and 30d are pressed, the motor 33 is driven, and the first carriage 411 and the spotlight [131] are moved in the scanning direction (arrow y direction shown in FIG. 24). Furthermore, when the operation keys 30a and 30c are pressed, the motor 135 is driven.
Spot light 3!131 is directed in a direction perpendicular to the scanning direction (second
4) in the direction of arrow X shown in FIG. Operator is manuscript G
While visually observing the spot light transmitted through the operation keys 30a~
30d to move the spotlight to point St on the document G shown in FIG.
Press 08. Then, the coordinate position specified by this St is stored in the main processor group 71 shown in FIG.

Similarly, when the position designation key 30e is pressed with the spotlight moved to 82 points on the document G, the positions of the 82 points are stored in the main processor group 71. The position of this spot light can be detected, for example, by counting the number of drive pulses of the pulse motor 33.135. After this, when the erasure range designation key 30f is pressed, a rectangular area (indicated by diagonal lines) with 81.32 points as diagonal points is designated as the erasure range, as shown in FIG. 25(a). Figure 25 (
As shown in b), when points 83 and 84 of the document G are designated and the erasure range designation key 30Q is pressed, the area other than the square with diagonal points Ss and 34 is designated as the erasure range. In this way, when the erasure range designation keys 30f and 30g are pressed, the main processor group 71 performs calculations based on the positions of the two designated points and the copy magnification, and the memory 14
0, a high level signal @'1'' is stored in the erase range portion, and a low level signal NO'' is stored in the other portions. That is, this memory 140 is constituted by, for example, a RAM whose capacity in each column direction is approximately equal to the moving distance of the spotlight gA131 in the X direction divided by the position resolution in the y force direction. , second
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, high level signals are stored in addresses corresponding to the shaded areas, and low level signals are stored in other addresses.

In this case, the -1 original is set with the copy side facing up,
After the erasure range has been specified, the document is turned over along the fixed scale 21 of the document table 2. Therefore, as shown in FIG. 26, the information stored in the memory 140 is also actually inverted in the column direction.

Next, a method of erasing the non-image area caused by the movement of the variable magnification lens block 8 will be explained. For example, as described above, the range of the non-image area obtained by moving the variable magnification lens block 8 is CXBOTM! :C
In XCE I L, calculations are performed in the main processor group 71 based on the above range, and the memory 14
0, a high level signal '°1'' is stored in the non-image area. That is, as shown in FIG. 7) [Enclosure, CXCE I
A high level signal is stored at an address corresponding to a range of L to CXL to I.

On the other hand, as shown in FIG. 27, an erasing array 150 serving as erasing means is provided close to the photosensitive drum 10, for example, between the charger 11 and the exposure section ph. As shown in FIGS. 28 and 29, this erasing array 150 has a plurality of light-shielding cells 151 arranged in a direction perpendicular to the rotational direction of the photoreceptor drum 10, and each light-shielding cell 151 has a A light emitting element 152 made of, for example, a light emitting diode as shown in FIGS. 30(a) and 30(b) is provided. Furthermore, a lens 153 is provided in the opening of each cell 151 facing the photoreceptor drum 10 to focus the light from the light emitting element 152 onto the surface of the photoreceptor drum 10 . The number of light emitting elements arranged in this erasing array 150 matches, for example, the capacity of the memory 140 in the column direction. here,
Assuming that the distance between the light emitting elements 152 is P and the number of elements is N, the total length of the erasing array 150 is Q-NXP.

The erase array 150 is driven by the array driver 160 described above. As shown in FIG. 31, this array driving section 160 includes a shift register 161 having the same number of bits as the number of pits in the column direction of the memory 140, and a store register 1 in which the contents of this shift register 161 are held.
62, a plurality of switch elements 1 that are turned on and off by each output signal of the store register 162;
The movable contacts 163a of these switch elements 163 are grounded, and the fixed contacts 163b are connected to the erase array 1, respectively.
It is connected to each cathode of the light emitting element 152 constituting 50. The anode of each of these light emitting elements 152 is connected to the power supply Vcc 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 30r is pressed, the first carriage 411 and the photosensitive drum 10 are operated, and the memory 140 is read in the row direction. One column of data is sequentially read out (as shown in FIG. 26). This read data D1 is transferred to the shift register 161 of the array driving section 160 in response to the clock signal CLK.

After one column of data is transferred to the shift register 161, the charged portion of the photoreceptor drum 10 is transferred to the erase array 15.
When the value reaches 0, the main processor group 71 outputs a latch signal LTH, and the data stored in the shift register 161 is supplied to the store register 162 in response to this signal. That is, since the erase array 150 is arranged between the charger 11 and the exposure section Ph, one row of data output from the memory 140 is stored in the erase array 1, for example.
50 and the exposed portion Ph is θ1, and the photoreceptor drum 1
0 is rotating at each speed, the latch signal L is supplied to the store register 162 before θ1/ω.
The output timing of TH is ilJml.

Each switch element 163 of the switch circuit 164 is controlled by the output signal of the store register 162. That is, when the output level of the store register 162 is high level, it is turned on, and when it is low level, it is turned off. As a result, the light emitting elements 152 connected to each switch element 163 are turned on when the switch element 163 is on, and are turned off when the switch element 163 is off. Therefore, among the charged parts of the photoreceptor drum 10, the part where the light emitting element 152 is turned on is charge-free, and even if the charge-free part is exposed afterwards, no electrostatic latent image is formed, and the original image is not erased. It means that it was 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 gist of the invention will be explained. In the present invention, the image of the document can be edited and copied using the multiple copy function, enlargement/reduction function, image transfer function, and image deletion function described above.

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. For example, as shown in FIG.
The portion of the image specified in the first range E1 can be moved to the second range E2 and copied.

This editing operation will be explained using FIG. 7. First, by operating the operation keys 30a to 30d and the position designation key 30e of the operation panel 30, as shown in FIG. 7(a), the spotlight S1. In S2, the first range E1 is specified. Next, in the same way, as shown in FIG. 7(b), the spot light 8
3.84 specifies the second range E2. After this, manuscript G
are set based on the center part Ga of the fixed scale 21, so the first range E1. When the second range E2 is specified, these first ranges E1. The distance Xi between the center part in the X direction of the second range E2 and the center part Gc of the fixed scale 21,
We can know x2. That is, as described above, the first range E1. After specifying the second range E2, when the edit specification key 30h is pressed, the main processor group 71
Difference Xa between spotlights 81 to S4 (Xa = X2-X
s ) is calculated.

In addition, the main processor group 71 includes spotlights Ss,
From the coordinate position of S2 and the coordinate position of 83.84, the first. Second
The range Ej, E2's X direction and y direction dimensions (Xol, Vo
l), (XD2, VO2) are determined, and the copying magnifications MX and My in the X and y directions are determined from these dimensions. That is, these copying magnifications MX and MV are obtained as MX''XE2/XEI My-VF6 /Vtt.Here, if the magnifications in the X direction and the The image specified in the range E1 is in the second range E2.
0% copied.

Further, the main processor group 71 calculates the moving distance XL of the variable power lens block 8 using the above-mentioned magnification M using the above-mentioned formula (1
) is calculated.

Furthermore, the main processor group 71 calculates CXBOTM and CXCEIL in the X direction as described above using the moving layer 81 XL of the variable magnification lens block 8, and calculates CXBOTM (7 )range,
! :The range from CXCE I L to CXLMT(7) is treated as a non-image portion, and a high level signal is stored in the corresponding address of the memory 140, as shown in FIG. The above operation is shown in the flowcharts of FIGS. 8(a), (b), and (c).

After that, when the copy key 30 is pressed, the main processor group 71 drives the pulse motor 31.67 according to the moving distance XL in the Move from to 8 points. The first carriage 411 and the photosensitive drum 1
0 is operated, data for one column in the row direction is sequentially read out from the memory 140, and a ninth column is written on the photoreceptor drum 10 by the same operation as when the erase range designation key 30Q is pressed. As shown in the figure, the second range E2
The image designated by the first range El is enlarged and formed within. In this way, the image formed on the photosensitive drum 10 is transferred to the second range E2. Thereafter, the paper P passes through the pair of fixing rollers 21, the pair of delivery rollers 22, and the pair of discharge rollers 24, and is discharged onto the tray 25, and the copying operation is completed.

Further, in the above example, only the image forming position is moved, but the present invention is not limited to this, and only a predetermined portion of the image may be moved to another position, and the remaining portion may be erased. Furthermore, the image may be moved in the X direction by changing the feeding timing of the paper P.

As described above, the image of the document specified in the first range can be enlarged or reduced and moved to the part specified in the second range to be formed. Therefore, the document uniformity can be edited and copied in many ways, which is extremely convenient in practice. In addition, the amount of movement of the lens block for variable magnification becomes clear, and it is possible to eliminate the moving layer of the lens in advance so as not to use parts of the lens with poor resolution. It is also possible to remove solid black that appears on the image.

Note that the invention is not limited to the above embodiments. For example, the arrangement position of the erasing array 150 is not limited to that shown in FIG. 27, but as shown in FIG. It is also possible to configure the data to be erased by

(Effects of the Invention) As detailed above, according to the present invention, copying can be performed at various magnifications by changing the arrangement of the original image in the direction perpendicular to the conveyance direction of the transfer material, and image editing is possible. It is possible to provide an image forming apparatus useful for, etc.

[Brief explanation of drawings]

Figures 1 to 31 show an embodiment of the present invention, in which Figure 1 is a perspective view showing the configuration of a moving mechanism for a variable magnification lens block, Figures 2, 3, and 4. 5 is a diagram for explaining the relationship between the photosensitive drum, the lens block for variable magnification, and the document table; FIG. 5 is a diagram for explaining the non-image area in the memory; FIGS. 6 and 7 are for explaining the editing operation. FIG. 8 is a flow chart for explaining the main part of the operation; FIG. 9 is a diagram for explaining the editing state of the image on the photosensitive drum; FIG. 10 11 is a side sectional view of FIG. 10, FIG. 12 is a plan view showing the configuration of the operation panel, FIG. 13 is a perspective view showing the configuration of the drive unit, and FIG. The figure is a perspective view schematically showing the drive mechanism of the optical system, FIG. 15 is a side view schematically showing the drive mechanism of the pointer, FIG. 16 is a configuration diagram showing the overall control circuit, and FIG. 17 18 is a configuration diagram of the main processor group, and FIG. 18 is a configuration diagram of the first sub-processor group.
Fig. 9 is a block diagram of the second sub-processor group, Fig. 20 is a schematic block diagram showing the pulse motor control circuit, Fig. 21 is a diagram for explaining the speed control method of the pulse motor, and Fig. 22 is a spot light source. 23 is a side sectional view of the main part showing the spot light source, and FIGS. 24 and 25 are plane views shown to explain the operation of specifying the erasing range of the document using the spot light source, respectively. 26 is a diagram for explaining the contents of the memory, FIG. 27 is a side sectional view of the main part showing the arrangement of the erasing array, and FIG. 28 is only the main part showing the relationship between the erasing array and the photosensitive drum. perspective view, the 29th factor is the 28th factor
30(a) is a side sectional view showing the configuration of the erasing array, FIG. 30(b) is a front view with a part of the erasing array cut away, and FIG. 31 is the configuration of the array drive unit. FIG. 32 is a side sectional view of a main part showing an example of the arrangement of the erasing array in another embodiment. DESCRIPTION OF SYMBOLS 1... Main body, 2... Original table, 8... Lens block for variable magnification, 10... Photosensitive drum, 121.122.
...Developer, 28...Multiple copying unit, 30...
Operation panel, 30a to 30d...operation keys, 30e.
...Position specification key, 30h...Edit specification key, 31.
...Motor, 71...Main processor group, 131.
... Spot light source, 132 ... Light emitting element, 13
3... Lens, 135... Pulse motor, 140...
...Memory, 150... Erasing array, 152... Light emitting element, 153... Lens, 160... Array drive unit, P... Paper. Applicant's agent Patent attorney Takehiko Suzue - Figure 1 j12 C Figure 4 Figure 5 Figure 1K 6 Figure (a) Figure 7 Figure 8 (1)) 10 q Figure 18 Figure 20 Figure 22 Figure 23 Prisoner 25 (a) Figure 25 (b) Prisoner 26 (a) Figure 26 (b) Figure 927! 132v! J Figure 28 (a) (b) Figure 30

Claims (2)

[Claims] (1) A scanning device that moves along a document table and optically scans the document placed on the document table, and an image carrier on which an image corresponding to the document image guided by the scanning device is formed. In the image forming apparatus, the image forming apparatus includes a supplying means for supplying a transfer material corresponding to the document, and a transfer means for transferring an image formed on the image carrier to the supplied transfer material. An image forming apparatus comprising a moving means for moving a reflected light image from a document formed on an image carrier, and a moving amount specifying means for specifying the amount of movement by the moving means. (2) The moving means moves the reflected light image from the document formed on the image carrier in a direction perpendicular to the conveying direction of the transfer material. The image forming apparatus according to scope 1.