JPS6240477A - Image forming device - Google Patents

Abstract

PURPOSE:To obtain an image forming device that can prevent erroneous setting of an original by indicating the set position of an original. CONSTITUTION:The first carriage 411 is shifted to a specified position (home position corresponding to magnification) by driving a motor 33 according to the size of paper and magnification. When a copying key 30 is depressed, the first carriage 411 is shifted first in the direction of the second carriage 4212, and then, a lamp 4 is lit up and the first carriage is shifted in the direction apart from the second carriage 412. When scanning of the original is finished, the lamp 4 is put out, and the first carriage 411 is returned to the home position. The first and second position indicating sections 171, 172 that indicate set position of the original are provided on the upper face of the first carriage 411. The position indicating sections 171, 172 are made to shape shown by the arrow and arranged opposite to each other and a scale 53 is put between. The first and second position indicating sections 171, 172 are constituted of light emission elements.

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.

Incidentally, recently, image forming apparatuses have been developed that are capable of specifying and erasing a predetermined range of a document image. In this image forming apparatus, the standards for setting a document may be different depending on whether a predetermined range of the document is specified or when copying the document. However, in the past, there was a problem in that it was easy to set the document in the wrong position because there was not enough means to indicate the standard for setting the document.

[Purpose of the invention]

This invention was made based on the above circumstances,
The purpose is to provide an image forming apparatus that can prevent mistakes in setting the original by displaying the position where the original is set.

[Summary of the invention]

In this invention, for example, when specifying an erasing range or copying a document, the first carriage is moved to the vicinity of the document setting position, and the document is displayed using the scale provided on the first carriage and the first and second position display sections. The set position is displayed.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 3 and 4 schematically show an image forming apparatus of the present invention, such as a copying machine. A document table (transparent glass) 2 for supporting a document is fixed to the top surface of the copying machine main body 1. This document table 2 is provided with fixed scales 21 and 22 that serve as a reference for setting documents, and furthermore, a document cover 11 and a work table 12 that can be opened and closed are provided near the document table 2.
is provided. The original placed on the original platen 2 is exposed by an optical system consisting of an exposure lamp 4 and mirrors 5, 6, 7 being reciprocated in the direction of arrow a along the lower surface of the original platen 2. It is meant to be scanned. In this case, mirror 6.7 is configured to maintain the light exposure length.
is moved at 1/2 the speed of 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 is further reflected by the mirror. 9 and guided to the photoreceptor drum 10, so that an image of the document is formed on the surface of the photoreceptor drum 10.

The photosensitive drum 10 is rotated in the direction of arrow C in the figure, and first, the surface thereof is charged by the charging device 11. After this, the image is exposed to slit light to create a static image on the surface.
! A latent image is formed. This static N latent image is made visible by applying toner by the developing device 12.

On the other hand, the paper (transfer material) P is taken out one by one from the selected upper paper feed cassette 13 or lower paper feed cassette 14 by the delivery roller 15 or 16, and the taken out paper is taken out from the paper guide path 17 or 18 and is guided to a pair of registration rollers 19, and guided to a transfer section by this pair of registration rollers 19. Here, the paper feed cassettes 13 and 14 are removably provided at the lower right end of the main body 1, and one of them can be selected from an operation panel to be described later.

The cassette size of each of the paper feed cassettes 13 and 14 is detected by a cassette size detection switch 601 and 602, respectively. The cassette size detection switches 60r and 602 are 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 is brought into close contact with the surface of the photoreceptor drum 10 at the transfer charger 20, and
The toner image on the photoreceptor drum 10 is transferred by the action of 0. The transferred paper P is electrostatically peeled off from the photosensitive drum 10 by the action of a peeling charger 21, and is sent by a conveyor belt 22 to a fixing roller 23 as a fixing device provided at the end thereof. The transferred image is fixed by passing through this, and the fixed MP is discharged to a tray 25 outside the main body 1 by a pair of paper discharge rollers 24. Further, the photoreceptor drum 10 after the transfer is transferred to a charger 2 for removing static electricity.
6, residual toner on the surface is removed by a cleaner 27, and afterimages are roughly erased by a static elimination lamp 28, so that the initial state is restored. Note that 29 is a cooling fan for preventing the temperature inside the main body 1 from rising.

FIG. 5 shows an operation panel 30 provided on the main body 1. 3Ch is a copy key 302 that commands the start of copying.
is a numeric keypad for setting the number of copies, etc., 303 is a display unit that displays the operating status of each part and paper jams, etc., 304 is a cassette selection key for selecting the upper and lower paper feed cassettes 13 and 14, and 30s is a selected key. A cassette display section for displaying the cassette, 30s a magnification setting key for setting the magnification and reduction magnification of copies in a predetermined relationship, 307 a zoom key for steplessly setting the magnification and reduction magnification, and 30e for displaying the set magnification. A display section, 309 is a density setting section for setting the copy density, 30a, 30b, 30c, and 30d are operation keys for moving a spot light source indicating the erasing position of the original, which will be described later, and 30e is for inputting the coordinate position indicated by the spot light source. Position designation keys 30f and 30Q are removal range designation keys 3 for designating erasure ranges at designated positions, respectively.
0h is an erase mode setting key for setting an erase range specification mode.

FIG. 6 shows an example of the configuration of a drive source for each drive section of the copying machine configured as described above, and is composed of the following motors. That is, 31 is a lens motor, which is a motor for moving the position of the lens block 8 for performing magnification change. Reference numeral 32 denotes a mirror motor, which connects the mirror 5 and mirrors 6 and 7 for variable magnification.
This is a motor for changing the distance II (optical path length) between the two.

A scanning motor 33 is a motor for moving the exposure lamp 4, the mirror 5, and the mirror 6.7 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 11 during zooming. A developing motor 35 is a motor for driving the developing roller of the developing device 12 and the like. 36 is a drum motor, which is a motor for driving the photosensitive drum 10. Reference numeral 37 denotes a fixing motor, which is a motor for driving the paper conveyance path 22, the pair of fixing rollers 23, and the pair of paper discharge rollers 24.

38 is a paper feed motor, and the feed roller 15, 16
This is a motor for driving. A paper feeding motor 39 is a motor for driving the registration roller pair 19. A fan motor 40 is a motor for driving the cooling fan 29.

FIG. 7 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 mirror 6.7 is supported by a second carriage 422, and these carriages 411.412 are guided by guide rails 421.422 in the direction of arrow a. It is said to be able to move in parallel. Further, the four-phase pulse motor 33 drives a 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 mirror supporting mirror 6.7
Two pulleys 47.47 are rotatably provided on the guide portion 46 of the carriage 422 and spaced apart in the axial direction of the rail 422.
is being handed over. One end of this wire 48 is a fixed part 49
The other end is connected to the fixing part 4 via a coil spring 50.
9, respectively. Further, one end of a first carriage 411 is fixed to a midway portion of the wire 48. Therefore, by rotating the pulse motor 33, the belt 45 rotates and the first carriage 411 is moved, and the second carriage 422 is also moved accordingly. At this time, since the pulleys 47, 47 serve as movable pulleys, the second carriage 422 is moved 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 41 and 1.412 are controlled by switching the rotational direction of the pulse motor 33.

In addition, the document table 2 usually has a designated document (P
X,PV),! :L, magnification gQ constant $-30s.

If the copy magnification specified by 307 is K, the copyable range (x, y) is rx-Px/KJ.

ry=Py/Kl. 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 y direction is indicated by a scale 53 provided on the upper surface of the first carriage 411.
and the distance between the fixed scales 21.

As shown in FIG. 8, the above-mentioned pointers 51.
55 via a spring 56. The pulley 55 is rotated by a motor 58, and by driving the motor 58 in accordance with the determined possible copying range in the X direction, the distance between the pointers 51 and 52 is changed. It is now possible to

Further, the first carriage 411 is moved to a predetermined position (home position according to the magnification) by driving the motor 33 according to the paper size and the magnification. When the copy key 301 is pressed, the first carriage 41r is first moved toward the second carriage 412, and then the lamp 4 is turned on and moved away from the second carriage 412. When scanning of the original is completed, the lamp 4 is turned off and the first carriage 41
1 is returned to the home position.

Furthermore, on the upper surface of the first first carriage 411,
First and second position display sections 1 that display the document set position
71.172 are provided.

These position display parts 171 and 172 are arrow-shaped and are arranged to face each other with the scale 53 in between. These first and second position display parts 171 and 172
are each composed of a light emitting element, and are selectively illuminated and displayed by a main processor group 71, which will be described later.

FIG. 9 shows the overall control circuit.

The main processor group 71 detects inputs from input devices 75 such as the operation panel 30 and various switches and sensors, such as the cassette size detection switches 601 and 602, and includes a high voltage transformer 76 that drives the various chargers.
, the static elimination lamp 28, the blade solenoid 27a of the cleaner 27, the heater 23a of the fixing roller pair 23
, the exposure lamp 4, and each of the motors 31-40.
58, etc. to perform the above-mentioned copying operation, and control the sub-box 1-light source 131, pulse motor 135, memory 140, erasing array 150, array drive unit 160, etc. to erase unnecessary portions of the original. It also controls the first and second position display sections 171 and 172 to display the document set position. Incidentally, a spot light 1131, a pulse motor 135, an erasing array 150, an array driving section 1601, a memory 140, a first
The second position display sections 171 and 172 will be described later.

Among the above motors 31 to 40.58, motor 35.37
, 40I3 and the developing device 12, the toner motor 77 is controlled by the main processor group 71 via a motor driver 78, and
5 are controlled by the first sub-processor 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 connected to the main processor group 71 via a lamp regulator 81.
The heater 23a is controlled by the main processor group 71 via the heater control section 82. Then, from the main processor group 71 to the first and second sub-processor group 72
．． Commands to drive and stop each motor are sent to the first motor 73.
．． A status signal indicating the drive or stop state of each motor is sent from the second sub-processor group 72, 73 to the main processor group 71. In addition, the first sub-processor group 7
2 receives position information from a position sensor 83 that detects the initial positions of the motors 31 to 34.

FIG. 10 shows an example of the configuration of the main processor group 71. One-chip microcomputer 91 (hereinafter referred to as
The microcomputer (simply referred to as a microcomputer) detects human power on keys on an operation panel (not shown) and performs various display controls via an input/output board 92.

Furthermore, the 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.
A size switch for detecting paper size and other inputs are connected to 4, and a copying condition setting switch and other inputs are connected to input/output port 95. Note that the input/output port 96 is an option.

FIG. 11 shows an example of the configuration of the first sub-build O setter group 72. The microcomputer 101 is the main processor group 7
1 is connected. Programmable interval
The timer 102 controls the phase switching interval time of the pulse motor, and when a setting value is set from the microcomputer 101, counting of reference clock pulses is started based on the setting value, and when the clock runs 1-out, the end pulse is sent to the microcomputer 101. The signal is output to the interrupt line 101. Further, the microcomputer 101 receives position information from the position sensor 83 and is connected to input/output ports 103 and 104. The input/output board 104 includes the pulse motor driver 7.
Motors 31 to 34.135 are connected via 9. The input/output board 103 is used, for example, to output status signals of each pulse motor to the main processor group 71.

FIG. 12 shows the configuration of the second sub-processor group 73. The microcomputer 111 is connected to the main amplifier O and the processor group 7.
1 is connected. Programmable interval
The timer 112 controls the phase switching interval time of the pulse motor, and when a set value is set from the microcomputer 111, it starts counting reference clock pulses based on it, and outputs a termination pulse when the timer 112 counts out. It has become. This end pulse is applied to the latch circuit 113.
The output is supplied to the interrupt line and input/output board input line of the microcomputer 111. In addition, an input/output boat 114 is connected to the microcomputer 111.
Motors 36, 38, 39, and 58 are connected to this input/output boat 114 via the pulse motor driver 80.

Figure 13 shows the control circuit of the pulse motor.
The input/output boat 121 (corresponding to the input/output boats 104 and 114 in Figs. 11 and 12) has a pulse motor driver 1.
22 (corresponding to the pulse motor drivers 79 and 80 in FIG.
．． 38.39) are connected to each other.

FIG. 14 shows a method for controlling the speed of a pulse motor, in which (a) is a speed curve of the pulse motor, and (b) is a phase switching interval.

As is clear from this figure, the phase switching interval is long at the beginning;
They gradually shorten, then become evenly spaced, then gradually lengthen again, and then stop. That is, this shows 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. Note that tl, t2, . . . tx indicate the time of the phase switching interval.

Next, the document image erasing means will be explained.

In FIGS. 15 and 16, the first carriage 41! A guide shaft 130 is provided along the lamp 4 in a portion where the light of the lamp 4 is blocked, and a spot light i1 is provided on this guide shaft 130 as a means for indicating the erasing range of the document.
! 131 is movably provided. As shown in FIG. 16, this spot light [131 is composed 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 document table 2.
The light generated by the lens 32 is irradiated onto the document table 2 by a lens 133 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) 1 disposed along the guide shaft 130.
It is connected to 34. This timing belt 134 is connected to a pulley 136 provided on the rotating shaft of a pulse motor 135.
A hook is passed between the driven pulley 137 and the driven pulley 137.

Therefore, by rotating the pulse motor 135, the spot light source 131 is moved to the first carriage 41! is moved in a direction perpendicular to the scanning direction.

Further, a position sensor 138 consisting of a microswitch for detecting the initial position of the spot light source 131 is provided in the first carriage 411 located at the end of the guide shaft 130 on the pulse motor 135 side.

For example, when the spot light source 131 is moved,
First, the spot light source 131 comes into contact with the position sensor 138 to detect the initial position.

Next, a method for specifying the erasing range of a document using the spot light source 131 will be described with reference to FIGS. 17 to 19. This spot light source 131 is the operation key 30a.
When ~30d is operated, the light emitting element 132 can be moved in a lit state. That is, when the operation keys 30b and 30d are pressed, the motor 33 is driven, and the first carriage 411 and the spot light source 131 are moved in the scanning direction (the direction of the arrow y shown in FIG. 17). In addition, operation keys 30a, 30c
When you press , the motor 135 is driven and the spot light source 13
1 is moved in a direction perpendicular to the scanning direction (direction of arrow X shown in FIG. 17). The operator operates the operation keys 30a to 30d while visually observing the spot light transmitted through the document G. For example, after moving the spotlight to point Sr on the document G shown in FIG. 18(a), the operator presses the position designation key 30e. Press. Then, the coordinate position specified by this Ss is stored in the main processor group 71 shown in FIG. Similarly, 8 of manuscript G
With the spotlight moved to two points, press the position specification key 30e.
When the button is pressed, 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 with diagonal points of 81.82 points is selected as shown in FIG. 18(a)! (indicated by diagonal lines) is designated as the erase range. Also, as shown in FIG. 18(b), the erasure range designation key 3 is used to specify the Si point, 84 points, of the document G.
When 00 is pressed, the area other than the square with 83.84 points as diagonal points is designated as the erasing range. In this way, when the erasing range keys 30f and 30g are pressed, the main processor group 7
1, and the memory 140 stores a high level signal 1111+ in the erase range portion and a low level signal TTOII in the other portions. That is, this memory 140 is constituted by a RAM whose capacity in each column direction is approximately equal to the movement distance of the spot light source 131 in the X direction divided by the position resolution in the y force direction, and the memory 140 stores data supplied from the main processor group 71. Therefore, in the case of Fig. 18(a), the area corresponds to the shaded area as shown in Fig. 19(a), and in the case of Fig. 18(b), as shown in Fig. 19(b). A high level signal is stored at the address where the data is stored, and a low level signal is stored at the other addresses.

In this case, the original is set with the copy side facing up, and after the erasure range is specified, it is turned over to the fixed scale 21 side of the original table 2. Therefore, as shown in FIG. 19, the information stored in the memory 140 is also stored accordingly.

On the other hand, as shown in FIG. 20, an erasing array 150 serving as erasing means is provided close to, for example, between the charger 11 of the photosensitive drums 10 and the exposure section ph. As shown in FIGS. 21 and 22, 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 plurality of light shielding cells 151 arranged therein in a direction perpendicular to the rotational direction of the photoreceptor drum 10. A light emitting element 152 made of, for example, a light emitting diode is provided as shown in FIG. A lens 153 that condenses light is provided on the surface of the photosensitive 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. 24, this array driving section 160 includes a shift register 161 having the same number of bits as the number of bits in the column direction of the memory 140, and a store register 16 in which the contents of this shift register 161 are held.
2. It is constituted by a switch circuit 164 consisting of a plurality of switch elements 163 that are controlled 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 grounded. Each of the light emitting elements 152 constituting the erasing array 150 is connected to each cathode. 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 301 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. 19). 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 it reaches 0, the main processor group 71 outputs a latch signal LTH, which is supplied to the shift register 162 in response to this signal.

That is, since the erasing array 150 is arranged between the charger 11 and the exposure section Ph, one row of data output from the memory 140 is generated when the angle between the erasing array 150 and the exposure section ph is θ1, for example. Assuming that the photosensitive drum 10 is rotating at each speed, the output timing of the latch signal LTH is controlled so that it is supplied to the store register 162 before θ1/ω.

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 162 is on, and are turned off when the switch element 162 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, no static N 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 this invention, the scale 53 and the first and second position display sections 17 provided on the first carriage 411 are
1.172 is used to display the document set position on the document table 2. That is, as described above, the first scale 53 is normally positioned at a position that represents the copyable range of the document determined according to the set paper size and copy magnification, as shown in FIG. 1(a). The first carriage 411 is moved so that the second position indicator i! 9172 is lit. “Therefore, the operator can recognize that it is only necessary to set the document G on the fixed scale 21 side.

On the other hand, the erase mode setting key 30h of the operation panel 30
When is operated, the first carriage 411 is moved to the erase position under the control of the main processor group 71. That is, when the erase mode setting key 3C1l is operated, the main processor group 71 first moves to step ST as shown in FIG. The first carriage 411 is moved to the position shown.

The main processor group 7 is in a position indicating this erase mode.
1 is stored. At the position indicating this erase mode, the second position display section 1727'l is turned off, and the first position display section 171 is turned on.

Therefore, the operator can set the document on the fixed scale 22 side in the erase mode. After that, in step ST2, the erasing range of the original set on the fixed scale 22 side is specified, and in step ST3
At , it is determined whether or not the copy key 301 has been operated. As a result, when the copy key 301 is operated,
In step ST4, the previous erasing copying operation is performed. Thereafter, in step ST5, it is determined whether or not the erasure copying operation has been completed, and if the operation has been completed, control is transferred to step ST6. In this step ST6, the first carriage 411 is
At this position, the first position display 8IS171 is turned off, the second position display section 172 is turned on, and the process is completed.

According to the above embodiment, the first carriage 411 is moved so that the scale 53 corresponds to the document setting position in response to a normal copying operation or an erase/fill designation operation, and in this moving position, the first carriage 411 is Second position display section 171.1
72 is selectively illuminated to display the document set position. Therefore, since it is possible to easily recognize the setting position of the original, it is possible to prevent mistakes in setting the original.

In the above embodiment, the first and second position display sections 171.
172 is selectively turned on, but the present invention is not limited to this, and the first and second position display sections 171 and 172 may be selectively turned on and off.

Furthermore, the arrangement position of the erasing array 150 is not limited to that shown in FIG. 20, but as shown in FIG. It is also possible to configure the data to be erased by

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 in detail above, according to the present invention, it is possible to provide an image forming apparatus that can prevent mistakes in setting the original by displaying the setting position of the original.

[Brief explanation of drawings]

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 to explain the operation, FIG. 2 is a diagram shown to explain the operation, and FIG. , 4th
The figures show the configuration of the image forming apparatus, and FIG. 3 is an external perspective view, FIG. 4 is a side sectional view, FIG. 5 is a plan view showing the configuration of the operation panel, and FIG. 6 is the configuration of the drive unit. A perspective view showing
FIG. 7 is a perspective view schematically showing the drive mechanism of the optical system;
The figure is a perspective view schematically showing the pointer drive mechanism, Figure 9 is a configuration diagram showing the overall control circuit, Figure 10 is a configuration diagram of the main processor group, and Figure 11 is the configuration of the first sub-processor group. Figure 12 is a configuration diagram of the second sub-processor group;
Figure 3 is a schematic configuration diagram showing the control circuit of the pulse motor.
Figure 4 is a diagram for explaining the speed control method of the pulse motor, Figure 15 is a perspective view of the main part showing the spot light source, and Figure 16 is a diagram for explaining the speed control method of the pulse motor.
The figure is a side sectional view of the main part showing the spot light source, Figures 17 and 18 are plan views shown to explain the operation of specifying the erase range of the original using the spot light source, and Figure 19 shows the contents of the memory. 20 is a side sectional view of the main part showing the arrangement of the erasing array, FIGS. 21 and 22 are diagrams shown for explanation.
The figures show the relationship between the erasing array and the photoreceptor drum. Figure 21 is a perspective view showing only the main parts, Figure 22 is a front view showing only the main parts, and Figure 23 is a diagram showing the configuration of the erasing array. Figure (a) is a side sectional view, Figure (b) is a side sectional view.
24 is a circuit diagram showing the structure of the array driving section, and FIG. 25 is a side sectional view of the main parts showing another arrangement example of the erasing array. DESCRIPTION OF SYMBOLS 1...Main body, 2...Document stand, 10...Photosensitive drum, 30...Operation panel, 30a-30d...Operation key, 30e...Position specification key, 3Of, 30a...
- Erasing range specification key, 30h... Erasing mode setting key, 71... Main processor group, 131... Spot light source, 132... Light emitting element, 133... Lens, 135... Pulse motor, 140... Memory, 150... Erasing array, 152... Light emitting element, 1
53... Lens, 160... Array drive unit, 171
．． 172...First and second position display parts, P...Paper, Ph...Exposure part. Applicant's agent Patent attorney Takehiko Suzue (a) (b) 2V Figure 3 Figure 12 Figure 73 (a) @ Figure 18 (b) Whistle Figure 18 (a) (b) Figure 79 Figure 20 925 Figure 21 (a) (b) II Figure 23

Claims (3)

[Claims] (1) A scale is provided at both ends of the document table to serve as a reference for setting the document, and the document set along one scale is optically scanned by a scanning means, and an image corresponding to the image of the document is transferred to the transferred material. In an image forming apparatus for transferring images to a computer, an indicating means is provided in the scanning means for indicating a predetermined range of a document set along the other scale using transmitted light, and erasing an image corresponding to the indicated range. an erasing means, a selection means for selecting a normal image forming operation or a range specifying operation by the instruction means, and a selection means provided in the scanning means for displaying the set position of the original according to the normal image forming operation or the range specifying operation. The apparatus further comprises a display means, and a control means for moving the scanning means to a predetermined document setting position corresponding to one or the other scale according to the operation of the selection means, and operating the display means at this position. An image forming apparatus characterized by: (2) The image forming apparatus according to claim 1, wherein the display means comprises an arrow-shaped light emitting element disposed opposite to the moving direction of the scanning means. (3) The image forming apparatus according to claim 1, wherein the instruction means is comprised of a light emitting element that is movable in a direction perpendicular to the direction of movement of the scanning means and irradiates the document with a spot light.