JPS6262384A - Image forming device - Google Patents

Abstract

PURPOSE:To switch copying of a picture image in a screen and a picture image on an original platen automatically by providing a screen in which an original image can be written slidably in a copying machine and further providing a detector that detects the position. CONSTITUTION:A screen 65 slidable back and forth is provided on a slide rail 130 and detectors 1401 are provided at front end and rear end of the part of incidence 59. When the screen 65 is slide foreward and the front end detector is made on, a mirror 9 is turned to a position shown by a solid line. Then, the screen 65 is wound, an exposure lamp 66 scans the picture image, and light reflected from the screen 65 enters from a window 67 through a mirror 97, a lens 74, mirrors 98, 100 and an image is formed on a sensitive drum 10. When the screen is slid rearward, and the rear end detector is made on, the mirror 9 is returned to a position shown by dotted lines, and ordinally copying is made by light corresponding to the picture image on the original platen.

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 Problem 1] 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.

However, conventional copying machines can only copy original images placed on a document support member of the main body of the copying machine.

By the way, blackboards are often used in meetings and the like, and it would be extremely convenient if characters, figures, etc. written on the blackboard could be copied.

[Object of the invention] This invention was made based on the above circumstances,
The purpose is to provide an image forming apparatus that can automatically switch between copying a normal original image and copying characters, figures, etc. written on a blackboard.

[Summary of the Invention] The present invention provides a copying machine with a slidably provided screen portion including a second document support member on which a document image can be directly written on itself, such as a blackboard, and The position of the copying machine is detected by a detection means, and depending on the detection result, the copying of the image drawn on the screen and the copying of the original image placed on the copying table of the copying machine are automatically performed. This is how it was done.

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

FIGS. 1 and 2 schematically show the configuration of an image forming apparatus according to the present invention. Reference numeral 1 denotes a main body of a copying machine incorporating a copying mechanism, and a screen portion 61 is attached to the upper part of the main body 1 so as to be slidable in six directions shown by arrows.

That is, slide rails 130 and 130, which are moving means, are provided on the upper right side of the copying machine 111 where the incidence section 59 is provided and on the upper left side of the copying machine 1. 61
is now retained. Above slide rail 1
30, the first fixed part 1301 is fixed to the copying machine 11111g, and the second moving part 1306 is fixed to the screen part 61.
By fixing the screen portion 61 to the copying machine 1,
Back and forth (in the six directions of arrows)! It is possible to study.

Further, detectors 1401 and 1402 as detection means, which will be described later, are provided at the front edge and the rear edge of the incident section 59, respectively.

Roughly speaking, the incident section 59 is provided with a window section 67 for guiding light corresponding to the image on the screen 65 supplied from the screen section 61 into the inside of the copy 'm1.

A glass 67a is provided inside the window portion 67, for example, so as to be orthogonal to the optical axis of the incident light.
7a prevents dust and the like from entering the interior of the copying machine 1.

The screen section 61 includes a screen unit 62 and an optical system unit 63.

A screen window 6 is provided in front of this screen unit 62.
4 is formed, and a screen 65, which is a second document support member, is provided inside thereof so as to be movable as shown by arrows b1 and b2 in the figure. Furthermore, an operation panel 90 is provided below the screen window 64.

FIG. 3 shows the configuration of the operation panel 90. 901 is a copy key that commands the start of copying a screen image; 902 is a right movement key that moves the screen 65 to the right and winds it up by a predetermined length; and 903 is a key that moves the screen 65 to the left by a predetermined length. This is the left movement key for winding.

FIG. 4 schematically shows the copying mechanism of the copying machine main body 1. On the top surface of the copying machine 1, there is a document table (transparent) which is the first document support member that supports the document. A glass (glass) 2 is fixed thereto, and a document cover 3 that can be opened and closed is provided near the document table 2. Further, the document table 2 is provided with a fixed scale 21 that serves as a reference for setting the document.

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 is further described later. The light is reflected by a rotatably provided mirror 9 and guided to a 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, thereby forming an electrostatic latent image on the surface. This electrostatic latent image is made visible by applying toner by the developing device 12.

On the other hand, the paper (material to be transferred) 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 passes through the paper guide path 17 or 18 to the registration roller pair. 19, and is sent to the transfer section by this pair of registration rollers 19. Here, the paper feed cassette 1
3.14 is removably provided at the lower right end of the copying machine 1, and either one can be selected on the operation panel described later. In addition, each of the above-mentioned paper feed cassettes 13 and 14 has a cassette size detection switch 6.
The cassette size is detected by 01.602. This cassette size detection switch 60! , 60
2 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 20, so that the toner image on the photoreceptor drum 1o 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 the fixing, the paper P is discharged to a tray 25 outside the copy 111 by a pair of paper discharge rollers 24.

Further, the photoreceptor drum 10 after the transfer is transferred to a charger 26 for removing static electricity.
After the static electricity is removed by the cleaner 27, residual toner on the surface is removed, and the afterimage is roughly erased by the static electricity removal lamp 28, thereby returning to the initial state. Note that 29 is a cooling fan for preventing the temperature inside the copying machine 1 from rising.

FIG. 5 shows an operation panel 30 provided on the copying machine 1. As shown in FIG. 30! is a copy key that commands the start of copying, 3
02 is a numeric keypad for setting the number of copies, etc.; 303 is a display unit that displays the operating status of each part, paper jam, etc.; 30
4 is a cassette selection key for selecting the upper and lower paper feed cassettes 13 and 14; 30s is a cassette display section for displaying the selected cassette; 306 is a magnification setting key for setting the copy enlargement and reduction magnification in a predetermined relationship; Reference numeral 307 is a zoom key for steplessly setting the enlargement/reduction magnification, 30e is a display section for displaying the set magnification, and 30s is a density setting section for setting the copy density.

FIG. 6 shows an example of the drive source configuration of each drive unit of the copying machine 1 configured as described above, and is configured with the following motors. That is, 31 is a lens motor, which is a motor for moving the position of the lens block 8, which is used to perform magnification change, in the direction indicated by the arrow in the figure. A mirror motor 32 is a motor for changing the distance (optical path length) between the mirror 5 and the mirror 6.7 for changing the magnification. 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.

34 is a shutter motor, which connects the photosensitive drum 10 when changing magnification.
This is a motor for moving a shutter (not shown) for adjusting the charging width by the charger 11. 35
A developing motor is a motor for driving a developing roller and the like of the developing device 12. 36 is the drum motor,
This is a motor for driving the photosensitive drum 10.

A fixing motor 37 is a motor for driving the paper transport path 22, the pair of fixing rollers 23, and the pair of paper discharge rollers 24. 38 is a paper feed motor, which is connected to the above-mentioned feed roller 15.
．． This is a motor for driving 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. 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 412, and these carriages 411, 412 are guided by guide rails 421, 422 in the direction of arrow a. It can be moved in parallel. That is, the four-phase pulse motor 33 for scanning drives the pulley 43. An endless belt 45 is stretched between the pulley 43 and the idle pulley 44, and one end of a first carriage 411 that supports the mirror 5 is fixed to a midway portion of the belt 45. On the other hand, two pulleys 47.47 are rotatably provided in the guide section 46 of the second carriage 412 that supports the mirror 6.7, spaced apart in the axial direction of the rail 422. wire 4 to
8 is hanging. One end of this wire 48 is connected to the fixed part 4
9, the other end is fixed to the fixing part 49 via a coil spring 50, respectively. In addition, the wire 48
One end of the first carriage 411 is fixed in the middle. Therefore, as the pulse motor 33 rotates, the belt 45 rotates and the first carriage 41! moves, and the second carriage 412 also moves accordingly.

At this time, since the pulleys 47 and 47 act as movable pulleys, the second carriage 412 is moved relative to the first carriage 41.
move in the same direction at 1/2 the speed. 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, a rotating wheel of, for example, a rotary solenoid 68 is attached to the base end of the mirror 9, and the mirror 9 is rotated by the rotary solenoid 68 as required.

Further, on the document table 2, a copyable range corresponding to the specified paper is displayed. That is, the paper size specified by the cassette selection key 304 is set to (PX, py
) and the copy magnification designated by the magnification setting keys 30s and 307 is K, then the copyable range (x, y) is x-Px/KV-Py/. Of this copyable range (x, y), the X direction is indicated by the pointers 51 and 52 provided on the back surface 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. 8, the above-mentioned pointers 51 and 52
．． 55 via a spring 56. The pulley 55 is rotated by a motor 58, and by driving the motor 58 in accordance with the paper size and magnification, the distance between the pointers 51 and 52 can be changed. ing.

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 magnification. Then, when the copy key 301 is pressed, the first carriage 411 first transfers to the second carriage 412.
After that, the lamp 4 is turned on and the second carriage 412 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 4
11 is returned to the home position.

FIG. 9 shows the overall control circuit, which is mainly composed of a main processor group 71 and first and second sub-processor groups 72 and 73. The main processor group 71 is
A high-voltage transformer 76 that detects input from the operation panel 30 and various switches and sensors, such as input devices 75 such as the cassette size detection switches 601 and 602, and drives the various chargers, the static elimination lamp 28, and the cleaner 27. The blade solenoid 27a1 controls the heater 23a1 of the pair of fixing rollers 23, the exposure lamp 4, and each of the motors 31 to 40.58 to perform the above-described copying operation.

Among the above motors 31 to 40.58, motor 35.37
．． 40 and the toner motor 77 that supplies toner to the developer 12 is controlled by the main processor group 71 via a motor driver 78, and the motors 31 to 34 are controlled by the first sub-processor 72 via a pulse motor driver 79. The motors 36, 38, 39, 58 are 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 #71 via the lamp regulator 81, and the heater 23a is controlled by the main processor group 71 via the heater control section 82. And main processor group 71
commands to drive and stop each motor are sent to the first and second sub-processor groups 72.73, and instructions to drive and stop each motor are sent from the first and second sub-processor groups 72.73 to the main processor group 71. A status signal indicating the status is sent.

The first sub-processor group 72 also includes motors 31 to 3.
Position information from a position sensor 83 that detects each initial position of 4 is input.

Further, the main processor group 71 includes an operation panel 90 provided on the screen section 61. A pulse motor driver 69, a lamp regulator 70, a rotary solenoid 68 that drives the mirror 9, and the detector 1.
401.1402 are connected. Pulse motors 84 and 85, which will be described later, move the screen 65, are connected to the pulse motor driver 69, and an exposure lamp 66, which irradiates the screen 65 with light, is connected to the lamp regulator 70.

FIG. 10 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 the human power of keys on the operation panel 30 and controls various displays through an input/output board 92. Also, microcomputer 91
is expanded by input/output ports 93-96.

The input/output boat 93 is connected to a high voltage transformer 76, a motor driver 78, a lamp regulator 81, and other outputs, and the input/output boat 94 is connected to a size switch for detecting paper size and other human-powered detectors 140! , 1402, etc. are connected, and the input/output boat 95 is connected to a copying condition setting switch and other human power. For example, the input/output boat 96 detects the human power of the keys on the operation panel 90, and controls the motor, exposure lamp, etc. corresponding to the human power of the keys.

FIG. 11 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 by setting a setting value from the microcomputer 101, it counts based on the setting value,
When the count is out, a termination pulse is output to the interrupt line of the microcomputer 101. A reference clock pulse is input to the timer 102. Also, microcomputer 101
, to which position information from the position sensor 83 is input, and input/output boats 103 and 104 are connected. The input/output boat 104 is connected to the motors 31 to 34 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.

The twelfth factor indicates 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 1.
A motor 36.3B is connected to this input/output boat 114 via the pulse motor driver 80.
, 39.58 are connected.

Figure 13 shows the control circuit of the pulse motor, and shows the input/output boat 121 (input/output boat 1 in Figures 11 and 12).
04.114) has a pulse motor driver 122
A pulse motor driver 123 (corresponding to the pulse motor driver 79.80 in FIG. 9) is connected to this pulse motor driver 122 (corresponding to the pulse motor driver 79.
．． 39), each volume 1@ASB%A, B is read directly.

Figure 14 shows the speed control method of a pulse motor.
Figure (a) shows the speed curve of the pulse motor, and Figure (b) shows the speed curve of the pulse motor.
) indicates 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. Furthermore, tl, t2
...tx indicates the time of the phase switching interval.

Next, the screen section 61 will be further explained.

15, 16 and 17 show the screen section 61
The configuration of the screen unit 62 and optical system unit 63 will be schematically explained.

In the screen unit 62, the screen 65
Both ends of are wound around winding cores 86 and 87, respectively.

These winding cores 86.87 have gears 861.871, respectively.
These gears 86s and 871 are provided with gears 841 and 851 rotated by motors 84 and 85.
are engaged. Then, by driving the motors 84 and 85, the screen 65 is moved by the arrow b shown in the figure.
It is designed to be moved in the 1 and b2 directions.

Further, inside the optical system unit 63, for example, a first
As shown in FIG. 7, an exposure lamp 66, a lens 74, and mirrors 97, 98, 99, and 100 are provided. The exposure lamp 66 and mirror 97 are provided along the width of the screen 65 in the vicinity of the winding core 86 of the screen 65, as shown in FIGS. 15 and 18.

Light generated from the exposure lamp 66 is irradiated onto the surface of the screen 65 wound around the winding core 86 . The reflected light from the screen 65 is reflected by the mirror 97 and guided to the lens 74. The reflected light guided to this lens 74 is reflected by mirrors 98, 99 and 100, and is reduced to a size corresponding to the transfer paper P. It is guided into the interior of the copying machine 1 through the photocopying machine 1.

Next, the gist of the invention will be explained. As described above, the screen portion 61 is slidably provided on the main body 1 via the slide rail 130.

Detectors 1401 and 1402 constituted by, for example, microswitches are installed at the front and rear edges of the entrance section 59 to which the slide rail 130 is attached.
(detection means) are provided respectively. The detector 1401 is turned on only when the screen portion 61 is slid forward and its front portion is located at the upper front edge of the copying machine 1. In addition, the detector 1402
is turned on only when the screen section 61 is slid rearward and its front section is located at the upper rear edge of the copying machine 1. As a result, the screen portion 6
1 was set in a position where a copying operation using light corresponding to the screen image can be performed, and whether the screen portion 61 was avoided by copying 11 to a position where a normal copying operation using light corresponding to the original image could be performed. It is now possible to detect whether or not this is the case.

The operation in the above configuration will be explained. As shown in FIG. 19, when the screen section 61 is set at a position where a copying operation using light corresponding to the screen image is possible, the detector 1401 is turned on. Then, the main processor group 71 stops the motors 31 to 34 and the lamp regulator 81, and stops the variable power lens block 8.
, stops the operation of the optical system such as the mirror 5, 6, 7 and the exposure lamp 4, and also controls the rotary solenoid 68 to cause the copying machine 1 to perform a copying operation using light corresponding to the screen image supplied from the screen section 61. Set it so that it can be done. At this time, the rotary solenoid 68 rotates the mirror 9 out of the optical path of the light incident from the window portion 67, as shown in FIGS. 20 and 21.

In this state, when the left movement key 903 of the operation panel 90 provided on the screen section 61 is operated, the main processor group 71 moves the pulse motor driver 69 to 1.
ilIIIO will be done. Thereby, this pulse motor driver 69 drives the pulse motor 84 to wind up the screen 65 around the winding core 86. Further, when the right movement key 902 on the operation panel 90 is operated, the main processor group 71 moves the six pulse motor drivers to If.
I will be treated. As a result, this pulse motor driver 6
9 drives a pulse motor 85 to wind up the screen 65 around a winding core 87.

Further, when the copy key 901 of the operation panel 90 is operated, the main processor group 71 controls the pulse motor driver 69 and the lamp regulator 70, and the copying machine 1 is operated. Then, the lamp regulator 70 causes the exposure lamp 66 to emit light, and the pulse motor driver 69 drives the pulse motor 84 to drive the winding core 84.
6, the screen 65 is wound up. At this time, the pulse motor 84 winds up the screen 65 in synchronization with the rotation of the photosensitive drum 10. Thereby, the image (characters, figures, etc.) written on the screen 65 is exposed and scanned by the exposure lamp 66 when the image is wound up.

The reflected light from the screen 65 is reflected by the mirror 97 as described above, passes through the lens 74, and is further reflected by the mirrors 98, 99 and 1°O.
The light is guided into the copying machine 1 from the window 67 of the incident section 59 via the glass 67a, and is imaged on the surface of the photoreceptor drum 10. The image formed on the photosensitive drum 10 is transferred to the paper P and discharged onto the tray 25 as described above. In this way, the image drawn on the screen 65 is formed on the paper P.

On the other hand, as shown in FIG. 22, when the screen unit 61 is moved to a position where a copying operation using light corresponding to the original image can be performed, the detector 1402 is turned on. Then, the main processor group 71 controls the rotary solenoid 6.
8, the mirror 9 is rotated to a position where the light supplied via the variable magnification lens block 8 is reflected onto the surface of the photosensitive drum 10. Further, the motors 31 to 34 and the lamp regulator 81 are driven to operate the optical system such as the variable magnification lens block 8, the mirror 5, 6, 7, and the exposure lamp 4, so that the normal copying operation as described above can be performed. Set it so that

In addition, the detector 140! When is off, screen section 6
1 is not correctly set in a position where copying operation is possible, so that copying operation using light corresponding to the screen image cannot be performed. In addition, the detector 14
02 is in the off state, the opening/closing of the document cover 3 is restrained by the screen portion 61, so that a copying operation using light corresponding to the document image cannot be performed.

According to the above embodiment, the copying machine 1 has one screen section 61.
It is extremely convenient for use in conferences, etc., since it can be set up freely and the image on the screen can be copied using the copying machine 1. Moreover, the position of the screen portion 61 is detected by the detectors 1401 and 1402, and the screen portion 6
1, the screen 65 of the screen portion 61
The setting of the copy 1fi1 is automatically switched to a state in which an image drawn on the document platen 2 can be copied or an image of a document placed on the document table 2 can be copied.

Therefore, it has good operability.

Furthermore, since the copying machine 1 is almost the same as a normal copying machine, the manufacturing cost and copying cost are low, and the copied images are also good.

Further, since the screen 65 is moved according to the operation of the photosensitive drum 10, the copying speed is fast.

Furthermore, since the screen section 61 is movably provided on the document table 2 of the copying machine 1111, there is an advantage that the screen section 61 does not need to be attached or detached even when used only as a copying machine.

Further, in the above embodiment, a rotary solenoid is used to rotate the mirror 9, but the present invention is not limited to this, and a pulse motor or the like may be used, for example.

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

[Effects of the Invention] As detailed above, according to the present invention, image formation is possible in which copying of a normal original image and copying of characters, figures, etc. written on a blackboard can be automatically switched. equipment can be provided.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an external perspective view of an image forming apparatus, FIG. 2 is a perspective view showing the screen section sliding, and FIG. 3 is an illustration of the operation panel of the screen section. 4 is a side sectional view of the copying machine according to the present invention; FIG. 5 is a plan view showing the structure of the operation panel; FIG. 6 is a perspective view showing the structure of the drive unit; FIG. The figure is a perspective view schematically showing the drive mechanism of the optical system, FIG. 8 is a perspective view schematically showing the drive mechanism of the pointer, FIG. 9 is a configuration diagram showing the overall control circuit, and FIG. FIG. 11 is a configuration diagram showing the main processor group, FIG. 11 is a configuration diagram showing the first sub-O setter group, FIG. 12 is a configuration diagram showing the second sub-processor group, and FIG. 13 is a schematic configuration diagram showing the pulse motor control circuit. 14 is a diagram for explaining the speed control method of the pulse motor, FIG. 15 is a perspective view schematically showing the structure of the screen section, FIG. 16 is a perspective view showing the structure of the screen unit, and FIG. 17 is a perspective view schematically showing the structure of the screen unit. The figure shows the configuration of the optical system unit.
Figure 8 is a top view shown to explain the scanning of the exposure lamp;
FIG. 19 is a diagram shown to explain the screen image copying operation, FIG. 20 is a diagram shown to explain the operation of the image forming apparatus, and FIG. 21 is a diagram shown to explain the main parts, FIG. 22 is a diagram showing the copying operation of an original image. 1... Copy machine, 2... Original table, 9... Mirror, 1
0...Photosensitive drum, 59...Incidence part, 61...
Screen portion, 65...Screen, 66...Exposure lamp, 68...Rotary solenoid, 71...
Main processor group, 74... Lens, 84.85.
...Pulse motor, 86.87... Winding core, 90...
Operation panel, 97-100...Mirror, 130...
Slide rail, 1401.1402...Detector, P
...Paper. Applicant's Representative Patent Attorney Takehiko Suzue Figure 6 Figure 12 Figure 13 Figure 16 Figure 17 Figure 18 Figure 19 Figure 22

Claims (3)

[Claims] (1) A first scan that moves relative to the main body and a first document support member provided on the main body and optically scans an image of the document placed on the first document support member. means, a first optical means for guiding a reflected light image from the first document support member scanned by the first scanning means to an image carrier to which a charge has been applied in advance, and the first optical means. An image forming apparatus comprising a transfer means for forming a reflected light image guided by the image carrier on the image carrier to form a charge pattern, developing this charge pattern and transferring it to a transfer material,
A second document support member that can directly form and display a document image on itself, and an optical system that moves relative to the second document support member and that optically captures the image formed on the second document support member. a screen portion comprising a second scanning device that scans the target image, and a second optical device that guides the reflected light image from the second document support member scanned by the second scanning device to the image carrier; , a moving means for moving the screen section in parallel with the main body, a detecting means for detecting the position of the screen section moved by the moving means, and a first scanning means in response to a detection output signal of the detecting means. 1. An image forming apparatus comprising: a control means for switching between image formation using a second scanning means or image formation using a second scanning means. (2) The image forming apparatus according to claim 1, wherein the screen section includes a driving means for moving the second document support member in synchronization with rotation of the image carrier. (3) The image forming apparatus according to claim 1, wherein the screen portion is provided with a second document support member substantially perpendicular to the first document support member.