JPS6221173A - Image forming device - Google Patents

Abstract

PURPOSE:To easily confirm the position of spot light by irradiating the periphery of spot light which is reduced in diameter with auxiliary light which has lower brightness and a larger diameter than said spot light. CONSTITUTION:A spot light source 131 which indicates the erasure range of an original is provided movably on a guide shaft 130 provided to a carriage 411 where light from the a lamp 4 is cut off. A light emitting element 132 is provided at the center part of the large-diameter part 131a of the spot light source 131 opposite an original platen 2, a lens 133 which form spot light having the extremely small diameter is provided at the small-diameter part 131b, and further a reflecting member 131c is provided at the periphery of the light emitting element 132. When the light emitting element 132 is turned on, the periphery of the spot light S on an original G which has high brightness and a diameter (d) is irradiated with the auxiliary light Sa which has the lower brightness and diameter D. Consequently, even when the diameter of the spot light is reduced according to erasure pitch, the position of the spot light S is easily recognized.

Description

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

[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 may be unnecessary parts in the original image. Recently, a copying machine has been developed that specifies this unnecessary portion by irradiating a spot light from below the document table and erases the image of this portion during copying.

In this type of copying machine, the diameter of the spot light is being reduced in response to the finer division of the erasing pitch.

However, if the diameter of the spot light is small, it is difficult to tell where the spot light is located when the document is irradiated with the spot light, resulting in poor operability.

It had a problem.

[Purpose of the invention]

This invention was made based on the above circumstances,
The purpose is to provide an image forming apparatus that is capable of erasing and copying any part of a document image and that allows easy confirmation of the spot light position.

[Summary of the invention]

This invention illuminates a document image with a spotlight, moves this spotlight to designate an erasing range, and irradiates a photoreceptor drum with light corresponding to the designated erasing range to erase an electrostatic latent image. Or it erases the charge and forms an image.
In particular, the position of the spot light can be easily confirmed by irradiating the periphery of the spot light with a reduced diameter with auxiliary light having a lower brightness and a larger diameter than the spot light.

[Embodiments of the invention]

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

FIGS. 12 and 13 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. Fixed scales 21 and 22 are provided at both ends in the longitudinal direction of the document table 2 to serve as a reference for setting the document, and furthermore, a document cover 11 and a work table 12 that can be opened and closed are provided near the document table 2. . 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 the speed of mirror 5, 172, so as to maintain the light 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 is further reflected by the mirror 5.6.7. 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 rotates in the direction of 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 to form an electrostatic latent image on the surface. This electrostatic latent image is made visible by applying toner by a 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 a delivery roller 15 or 16. The taken out paper P is guided to a registration roller pair 19 through a paper guide path 17 or 18, and guided to a transfer section by this registration roller pair 19. Here, the paper feed cassettes 13 and 14 are connected to the main body 1.
It is removably provided at the lower right end of the screen, and either one can be selected on the operation panel 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 in accordance with 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 20, so that the toner image on the photoreceptor drum 10 is transferred by the action of the charger 20. . This transferred paper P is transferred to the peeling charger 2
1, it is electrostatically separated from the photosensitive drum 10 and conveyed by the conveyor belt 22, and sent to a pair of fixing rollers 23 as a fixing device provided at the end of the conveyor belt 22, and by passing therethrough, the transferred image is is established. After fixing, the paper P is transferred to a tray 25 outside the main body 1 by a pair of paper ejection rollers 24.
It is designed to be discharged. After the photosensitive drum 10 has been transferred, the charge is removed by the charger 26, residual toner on the surface is removed by the cleaner 27, and afterimages are roughly erased by the charge removal lamp 28.
It is set to return to the initial state. Note that 29 is a cooling fan for preventing the temperature inside the main body 1 from rising.

FIG. 14 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 section, paper jams, etc.; 30'4
305 is a cassette display section for displaying the selected cassette; 306 is a magnification setting key for setting copy enlargement and reduction magnification in a predetermined relationship; 307 308 is a display section that displays the set magnification; 30s is a density setting section that sets the copy density; 30a, 30b, and 30C130d indicate the original erase position, which will be described later. 30e is a position designation key for inputting the coordinate position indicated by the spot light source; 30f and 30Q are erasure range designation keys for designating the erasure range at each designated position.

FIG. 15 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, 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 l1l (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. 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 feeding motor, which is a motor for driving the delivery rollers 15 and 16. 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. 16 shows a drive mechanism for reciprocating the optical system. That is, the mirror 5 and the exposure lamp 4
is supported by a first carriage 411, and mirror 6.7 is supported by a second carriage 422, respectively, and these carriages 411 and 412 are guided by guide rails 42r and 422 and are movable in parallel in the direction of arrow a. That is,
A four-phase pulse motor 33 drives a pulley 43. An endless belt 4 is connected between this pulley 43 and the idler pulley 44.
5 is stretched around the belt 45, and one end of a first carriage 411 that supports the mirror 5 is fixed to the middle part of the belt 45. On the other hand, the second carriage 4 supporting the mirror 6.7
Two pulleys 47.47 are rotatably provided on the guide portion 46 of the rail 422 and spaced apart in the axial direction of the rail 422, and a wire 48 is stretched between these pulleys 47.47.

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 monitor 33 rotates, the belt 45 rotates, the first carriage 411 moves, and the second carriage 422 also moves accordingly. At this time, pulley 4
7. Since 47 acts as a movable pulley, the first carriage 4
11, the second carriage 422 is moved in the same direction at 1/2 the speed. Note that the first and second carriages 41
1,412 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 (Px, Py), and the magnification setting keys 30s and rV-PV/Kl are used. Of this copyable range (x, y), the X direction is indicated by the pointers 51 and 52 provided on the back of the document table 2, and the y direction is indicated by the scale 53 provided on the upper surface of the first carriage 411. It is now displayed by.

As shown in FIG. 17, the above-mentioned pointers 51 and 52
4.55, and is provided on a wire 57 that is suspended via a spring 56. The pulley 55 is connected to the motor 5
This motor 5
8 is rotated according to the paper size and magnification, so that the distance between the hands 51 and 52 can be changed.

Also, the first carriage 41! is moved to a predetermined position (home position according to the magnification) by driving a motor 33 according to the paper size and magnification. Then, when the copy key 301 is pressed, the first
The carriage 411 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 411
is returned to the home position.

FIG. 18 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
Reference numeral 1 denotes a high-voltage transformer 76 that detects input from an operation panel 3o and input devices 75 such as various switches and sensors, such as the cassette size detection switch 601 and 602, and drives the various chargers, the static elimination lamp 28, and the The blade solenoid 27a of the cleaner 27, the heater 23a1 of the fixing roller pair 23, the exposure lamp 4, and each of the motors 31 to 40.58 are controlled to perform the copying operation described above, and the spot light source 131 and pulse motor 135 are controlled. , memory 1401 erase array 150,
It controls the array drive unit 160 and the like to perform an operation of erasing unnecessary portions of the document. Incidentally, a spot light source 131, a pulse motor 135, an erasing array 150, an array driving section 16
0 and the memory 140 will be described later.

Among the above motors 31 to 40.58, motor 35.37
．． A toner motor 77 that supplies toner to the developing unit 40 and the developing device 12 is controlled by the main processor group 71 via a motor driver 78.
are controlled by the first sub-processor group 72 via the 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 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 groups 72.7
Drive and stop commands for each motor are sent to the first motor. Second
From sub-processor group 72 and 73 to main processor group 7
1, a status signal indicating the driving or stopping state of each motor is sent. The first sub-processor group 72 also includes a position sensor 83 that detects each initial position of the motors 31 to 34.
Location information has been entered from.

FIG. 19 shows an example of the configuration of the main processor group 71. That is, 91 is a one-chip microcomputer (hereinafter abbreviated as microcomputer), and input/output board 9
2, key human power detection and various display controls on an operation panel (not shown) are performed. Further, the microcomputer 91 is expanded by input/output ports 93-96. and,
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 human power are connected to the input/output boat 94. is connected to the copy condition setting switch and other human power. Note that the input/output port 96 is an option.

FIG. 20 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;
By setting a set value from 1, a count is performed based on the set value, and when the count is out, an end pulse is output to the interrupt line of the microcomputer 101. Timer 10 above
2, a reference clock pulse is input. In addition, position information from the position sensor 83 is input to the microcomputer 1Ol, and input/output boats 103 and 104 are connected to the microcomputer 1Ol. The input/output boat 104 is connected to the motors 31 to 31 through the pulse motor driver 79.
34.135 are connected.

The input/output board 103 is used, for example, when outputting the stator inverse signal of each pulse motor to the main processor group 71.

FIG. 21 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. Numeral 112 is a programmable interval timer for controlling the phase switching interval time of the pulse motor, and when a set value is set by the microcomputer 111, it counts based on the set value, and outputs an end pulse when the count is out. This termination pulse is latched by the latch circuit 113, and its output is supplied to the interrupt line and input/output board input line of the microcomputer 111. In addition, the microcomputer 111 also has an input/output board 114.
is connected to the motor 36, 38, 3 through the pulse motor driver 80 to this output port 114.
9.58 is connected.

Figure 22 shows the control circuit of the pulse motor.
The input/output boat 121 (corresponding to the input/output boats 104 and 114 in FIGS. 20 and 21) has a pulse motor driver 1.
22 (corresponding to the pulse motor driver 79.80 in FIG. 18) is connected to the pulse motor driver 122.
．． 11A, B, A, and B (equivalent to 38.39) are connected.

FIG. 23 shows a method for controlling the speed of a pulse motor. FIG. 3(a) shows the speed curve of the pulse motor, and FIG. 1(b) shows the 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. In other words, this indicates the through-up and through-down of the pulse motor, starting from the self-starting region, being used in the high-speed region, and finally falling down. Note that tl, t2, . . . tx indicate the time of the phase switching interval.

Next, the document image erasing means, which is the gist of the present invention, will be explained.

1(a), (b-), and (c), the first carriage 411 is provided with a guide shaft 130 along the lamp 4 in a portion where the light of the lamp 4 is blocked.
30 is movably provided with a spot light source 131 as means for indicating the erasing range of the original. This spot light source 131 has a cylindrical large-diameter portion 131a and a small-diameter portion 131b arranged concentrically, as shown in FIG. A light emitting element 1 such as a light emitting diode or a lamp is placed oppositely to the light emitting element 1.
32 are provided. Further, the small diameter portion 131b is configured to transmit light generated from the light emitting element 132 to the document table G.
A lens 133 is provided to emit light as a spot light with an extremely small diameter. Further, around the light emitting element 132 in the large diameter part 131a, the light generated from the light emitting element 132 is passed around the small diameter part 131b to the document table G.
A reflecting member 131C is provided to irradiate the area.

Therefore, when the light emitting element 132 is turned on, as shown in FIG. is irradiated. The spot light S and the auxiliary light S
The luminance a has a brightness that allows the document G set on the document table 2 to be transmitted, for example, to the thickness of a postcard. Further, the spot light source 131 is connected to a timing belt (toothed belt) 134 disposed along the guide shaft 130.

The timing belt 134 is connected to a pulley 136 provided on the rotating shaft of the pulse motor 135 and a driven pulley 137. Therefore, by rotating the pulse motor 135, the spot light source 131 is moved in a direction perpendicular to the scanning direction of the first carriage 411. 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, the spot light source 131 first comes into contact with the position sensor 138 and its initial position is detected.

Next, a method of specifying the erasing range of the document using the spot light m131 will be explained. This spot light source 1
31 is moved with the light emitting element 132 lit by operating the operation keys 30a to 30d described above.

That is, when the operation keys 301) and 30d are pressed, the motor 33
is driven, and the first carriage 41! Then, the spot light source 131 is moved in the scanning direction (direction of arrow y shown in FIG. 3). Further, when the operation keys 30a and 30C are pressed, the motor 135 is driven, and the spot light 111131 is moved in a direction perpendicular to the scanning direction (direction of arrow X shown in FIG. 3). The operator operates the operation keys 30a to 30d while visually observing the spot light S transmitted through the document G, and for example, as shown in FIG.
With the spotlight S moved to point S1 on the document G shown in a), the position designation key 30e is pressed. Then, the coordinate position specified by this Sl is stored in the main processor group 71 shown in FIG. Similarly, when the position designation key 30e is pressed with the spotlight S 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 S is determined by, for example, a pulse motor 33.
This can be detected by counting the number of 135 drive pulses. Thereafter, when the erasure range designation key 30f is pressed, a rectangular area (indicated by diagonal lines) having the 82nd diagonal point St is designated as the erasure range, as shown in FIG. 4(a). Further, as shown in FIG. 4(b), if you specify points 83 and 84 on the original G and press the erase range specification key 300,
Ss, the area other than the square with 84 diagonal points is designated as the erasing range. In this way, when l is pressed on the erasure range designation keys 30f and 30, the main processor group 71 performs alI based on the positions of the two specified points and the copy magnification.
The calculation is performed, and the memory 140 receives a high level signal "1" in the erase range area and a low level signal "1" in the other areas.
0" is stored. That is, this memory 140 is constituted by a RAM whose capacity in each column direction is approximately equal to the moving distance of the spotlight [131 in the X direction ÷ the position resolution in the y force direction], and With the data supplied from the processor group 71, in the case of FIG. 4(a), the data as shown in FIG.
As shown in a), or in the case of FIG. 4(b), as shown in FIG. 5(b), a high level signal is sent to the address corresponding to the shaded area, and a low level signal is sent to the other addresses. is now memorized.

In this case, the original is fixed at a fixed scale of 2 with the copy side as the front.
1, and after the erasure range specification is completed, it is turned over and set, for example, along the fixed scale 21. therefore,
As shown in FIG. 5, the information stored in the memory 140 is also actually inverted in the column direction.

On the other hand, as shown in FIG. 6, 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. 7 and 8, this erasing array 150 includes a plurality of light shielding cells 1 in a direction perpendicular to the rotational direction of the photoreceptor drum 10.
51, and inside each of these light shielding cells 151, a light emitting element 152 made of, for example, a light emitting diode is provided as shown in FIGS. 9(a) and 9(b).

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 the erasing array 150 matches, for example, the arrangement of the memory 140 in the column direction. Here, if the distance between the light emitting elements 152 is P and the number is N, the total length of the erasing array 150 is Q=NXP.

The erase array 150 is driven by the array driver 160 described above. As shown in FIG. 10, 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, 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 this store register 162, the movable contact pieces 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 through 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. Data for one column (as shown in FIG. 5) is sequentially read out. 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 has been transferred to the shift register 161, when the charged portion of the photoreceptor drum 10 reaches the erase array 150, the main processor group 71 outputs a latch signal L.
TH is output, and in response to this signal, the shift register 16
2. That is, the erase array 150 is
and the exposure section ph, one line of data outputted by the memory 140 has, for example, an angle θl between the erasing array 150 and the exposure section Ph, and the photoreceptor drum 10 moves at each speed. If it is rotating at θ1/ω
The output timing of the latch signal LTH is adjusted so that it is supplied to the store register 162 earlier.

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 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.

According to the above embodiment, it is possible to specify and erase unnecessary portions of a document, which is convenient for editing a copy image. Moreover, since the auxiliary light Sa having a larger diameter is irradiated around the spot light S, the position of the spot light S can be easily recognized even when the diameter of the spot light is reduced according to the erase pitch. Is possible.

In addition, the auxiliary light Sa is a light emitting element 1 that generates a spot light S.
Since the remaining light of 32 is used, it has the advantage of not requiring a separate light source.

Note that this 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. 6, but as shown in FIG. It is also possible to configure it so that it is erased. It goes without saying that various other modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] As described in detail above, the present invention provides an image forming apparatus that is capable of erasing and copying any part of a document image, and also allows easy confirmation of the position of a spot light. can.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of an image forming apparatus according to the present invention, in which FIG. 1(a) is a perspective view of a main part showing a spot light source, and FIG. 1(b) and (c) show a spot light source, respectively. FIG. 2 is a side sectional view of the main parts, FIG. 2 is a diagram showing the relationship between the spot light and the auxiliary light, FIGS. 3 and 4 are plan views shown to explain the operation of the spot light source, and FIG. 5 is a diagram showing the memory. FIG. 6 is a side sectional view of the main part showing the arrangement of the erasing array, and FIGS. 7 and 8 are diagrams for explaining the contents, respectively. The figure is a perspective view showing only the main parts, Figure 8 is a front view showing only the main parts,
FIG. 9 shows the configuration of the erasing array, and FIG.
) is a side sectional view, FIG. 10 is a partially cutaway front view, FIG.
12 and 13 respectively show the configuration of the image forming apparatus. FIG. 12 is an external perspective view, and FIG. FIG. 14 is a side sectional view, and FIG. 15 is a plan view showing the configuration of the operation panel.
The figure is a perspective view showing the configuration of the drive section, FIG. 16 is a perspective view schematically showing the drive structure of the optical system, FIG. 17 is a perspective view schematically showing the pointer drive mechanism, and FIG. 18 is the entire structure. 19 is a configuration diagram of the main processor group, FIG. 20 is a configuration diagram of the first sub-processor group, FIG. 21 is a configuration diagram of the second sub-processor group, and FIG. 22 is a configuration diagram of the second sub-processor group. A schematic configuration diagram showing a control circuit of a pulse motor, and the 23rd factor is a diagram for explaining a speed control method of a pulse motor. DESCRIPTION OF SYMBOLS 1...Main body, 2...Document stand, 10...Photoconductor drum, 30...Operation panel, 30a-30d...Operation keys, 30e...Position specification key, 71...Main Processor group, 131...Spot light source, 131C...
- Reflective member, 132... Light emitting element, 133...
- Lens, 135... Pulse motor, 140... Memory, 150... Erasing array, 152... Light emitting element, 153... Lens, 160... Array drive section, S
...Spot light, Sa...Auxiliary light, P...Paper,
ph...Exposed area. Applicant's representative Patent attorney Takehiko Suzue Figure 1 (b) D Figure 1 (c) Figure 4 (a) Figure 4 (b) (a) (b) Figure 5 Figure 6 Figure 11 Figure 7 Figure (a) (b) I9 WJ Figure 21 Figure 22

Claims (2)

[Claims] (1) In an image forming apparatus comprising a scanning means for optically scanning a document placed on a document table, and a transfer means for transferring an optical image obtained by the scanning means to a transfer material, the scanning means an indicating means for generating a spotlight for indicating a predetermined range of a document and auxiliary light for illuminating the vicinity of the spot light; and an erasing unit for erasing an image within or outside the specified range during image formation. An image forming apparatus comprising: means. (2) the instruction means is a light emitting element that generates spot light;
2. The image forming apparatus according to claim 1, further comprising a reflecting member that irradiates residual light from the light emitting element around the spot light.