JPS6249389A - Image forming device - Google Patents

Abstract

PURPOSE:To make it possible to copy characters, graphic or the like drawn on a blackboard in addition to normal copying by fitting a screen part having the 2nd original supporting member enabled to directly write an original image attachably/detachably to a copying machine to switch the setting of a switching means arranged on the inside of the copying machine. CONSTITUTION:The screen part 61 is formed in the copying machine 1 and an image drawn on a screen 65 and an original image on an original plate 2 can be switched by a mirror to copy the selected image by the copying machine 1. Namely, the reflected light from the screen 65 is reflected by a mirror 97, again reflected by mirrors 98-100 through a lens 74 and then led into the inside of the copying machine 1 to form its image on the surface of a photosensitive drum.

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 Problems Therewith] 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 not only make normal copies but also copy characters, figures, etc. written on a blackboard.

[Summary of the Invention] This invention provides a copying machine with a screen portion that is removably provided with a second document support member on which a document image can be directly written on itself, such as a blackboard, and is provided inside the copying machine. By switching the settings of the switching means consisting of a mirror, the original image placed on the original support member of the copying machine body,
Also, the image drawn on the screen portion can be copied.

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

1 and 2 schematically show the configuration of an image forming apparatus according to the present invention. This is a first copying machine, and a screen portion 61 is detachably attached to the top of this copying machine 1. That is, holding parts 591 and 592 are provided on both sides of the upper part of the copying machine 1, and these holding parts 59r, 592,
The leg portions 61a of the screen portion 61 are fitted into the plurality of holding holes 59a provided in the screen portion 592. Also, the above copy I! A window section 67 is provided in the right holding section 591 of the copying rack 1 to guide light corresponding to the image on the screen 65 supplied from the screen section 61 into the inside of the copying rack 1 . A glass 67a is provided inside the window 67 so as to be perpendicular to the optical axis of the incident light, for example, and this glass 67a prevents dust and the like from entering the inside of the copying machine 1.

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

A screen window 64 is formed on the curved surface of the upper part of the screen 65 1-62, and a screen 65, which is a second document support member, is provided inside the screen window 64 so as to be movable as shown by arrows , b2 in the figure. . In addition, the screen window 64
An operation panel 90 is provided at the bottom of the screen.

FIG. 3 shows the configuration of the operation panel 90. 901 is a copy key that commands the start of copying the 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 configuration of the copying machine 1. On the top surface of the copying machine 1, there is a document table (transparent glass) 2 which is the first document support member that supports the document. is fixed. On this document table 2, the document set Mi$
! A fixed scale 21 is provided. and,
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 reciprocating along the lower surface of the original platen 2 in the direction of arrow a. It is designed to be exposed and scanned at times. In this case, mirror 6.
Mirror 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 and then passes through the variable magnification lens block 8, which will be further described later. The image of the document is reflected by a rotatably provided mirror 9 as a switching means and guided to the photoreceptor drum 10.
The image is formed on the surface of the

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, passes through the paper guide path 17 or 18, and then passes through the registration roller pair. 19, and is sent to the transfer section by this lens L-roller pair 19. Here, the paper feed cassettes 13 and 14 are removably provided at the lower right end of the copying machine 1, and one of them can be selected from an operation panel to be described later. In addition, each of the above-mentioned paper feed cassettes 13 and 14 has a cassette size detection switch 6.
0+, 602, the cassette size is detected. This cassette size detection switch 60r,
602 is turned on and off depending on the insertion of cassettes of different sizes? It is composed of an Ir1l microswitch.

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 photoreceptor drum 10 and conveyed by the conveyor belt 22, and a constant I provided at the terminal end thereof.
The transferred image is sent to a pair of fixing rollers 23 as an I unit, and the transferred image is fixed by passing there. After fixing, the paper P is discharged to a tray 25 outside the copying machine 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 charge is removed by the cleaner 27, residual toner on the surface is removed, and the afterimage is erased by the charge 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. 301 is a copy key for instructing the start of copying;
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 that selects the upper and lower paper feed cassettes 13 and 14; 30s is a cassette display section that displays the selected cassette; 30s is a magnification setting key that sets the copy enlargement and reduction magnification in a predetermined relationship. , 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 copy v11 configured as described above, and is configured with the following motors. That is, 31 is a lens motor, which is a motor for moving and lowering the position of the lens block 8 for changing the magnification. Reference numeral 32 denotes a mirror motor for changing the distance between the mirrors 5 and 6.7 (the optical path length) 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 controls the charging width of the photosensitive drum 10 by the charger 11 during zooming.
This is a motor for moving a shutter (not shown) for adjustment.

A developing motor 35 is a motor for driving the developing roller of the developing device 12 and the like. A drum motor 36 is a motor for driving the photosensitive drum 10. A fixing motor 37 is a motor for driving the paper transport path 22, the pair of fixing rollers 23, and the pair of paper discharge rollers 24.

38 is a paper feed motor, which is a motor for driving the above-mentioned delivery row 515.16. Three are the Gion feed motors,
This is a motor for driving the registration roller pair 19. A fan motor 4o 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, respectively, and these carriages 411 and 412 are guided by guide rails 421 and 422 in the direction of arrow a. It can be moved in parallel. That is, the four-phase pulse motor 33 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, the first carriage 411 moves, and the second carriage 412 also moves accordingly.

At this time, since the pulleys 47 and 47 serve as movable pulleys, the second carriage 412
move in the same direction at 1/2 the speed. Note that the moving directions of the first and second carriages 411 and 412 are controlled by switching the rotation direction of the pulse motor 33.

Further, a rotating shaft 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.

By this rotation of the mirror 9, the screen image is copied,
The copying of the original image can be switched.

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
) and the copy magnification specified by the magnification setting key 30.6.307 is K, then the copyable range (x, y) is x-Px/K-pyyK. 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 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.

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 4L+ 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-processors 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 27a, the heater 23a of the pair of fixing rollers 23, the exposure lamp 4, and each of the motors 31 to 40.58 are controlled to perform the copying operation'.
do the work.

Among the motors 31 to 40, 58, motor 35.37
．． 40 and the toner motor 77 that supplies toner to the developing device 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 group 72 via seven pulse motor drivers. The motors 36, 38, 39, and 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 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, 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 and second motors.
From sub-processor group 72.73 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.

Furthermore, an operation panel 90 provided on the screen portion 61, a pulse motor driver 69, a lamp regulator 70, and a rotary solenoid 68 for driving the mirror 9 are connected to the main processor 'u71. The pulse motor driver 69 includes a pulse motor 84.8 that moves the screen 65, which will be described later.
5 is connected to the lamp regulator 70, and an exposure lamp 66 for irradiating light onto the screen 65 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, the microcomputer 9"
1 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 human power are connected to the input/output boat 94. 95 is connected to a copy 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.

FIG. 12 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 1.
A motor 36.3 is connected to this input/output board 114 via the pulse motor driver 80.
8.39.58 is 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) are connected to each volume 1iASB, A, and B.

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 rR interval of the phase l/l exchange interval.

Next, the screen section 61 will be further explained.

15 and 16 schematically explain the configurations of the screen unit 62 and optical system unit 63 of the screen section 61.

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

These winding cores 86 and 87 have gears 86r and 87, respectively.
1, and these gears 861.87t include a gear 841.85t rotated by a motor 84.85.
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 FIGS. 7, 18 and 19, the exposure lamp 66, lens 74 and mirror 97.98.99.1
00 is set. 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 this screen 65 is
The light 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, and is transmitted through the window 67 of the holding section 591 into the copy 111. be guided.

Next, the operation in the above configuration will be explained. That is, the operation panel 90 provided on the screen section 61
When the left movement key 903 is operated, the main processor group 71 controls the pulse motor driver 69 .

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 pulse motor driver 69 is controlled by the main processor group 71. This results in
This pulse motor driver 69 is a pulse motor 85.
is driven to wind up the screen 65 around the winding core 87.

Also, when the copy key 901 of the operation panel 90 is operated,
Then, the main processor group 71 controls the pulse motor driver 69, the lamp regulator 7o, and the rotary solenoid 68, and operates the copy mode 1. At this time, the rotary solenoid 68 rotates the mirror 9 out of the optical path of the light incident through the window 67, as shown in FIGS. 20 and 21. The lamp regulator 70 causes the exposure lamp 66 to emit light, and the pulse motor driver 69 drives the pulse motor 84 to wind the screen 65 around the winding core 86. At this time, the pulse motor 84 winds up the screen 65 in synchronization with the rotation of the photosensitive drum 10. As a result, the image (characters, figures, etc.) written on the screen 65 is transferred to the exposure lamp 66.
This allows the film to be exposed and scanned when it is wound up. Further, as described above, the copy key 90 of the operation panel 90
+ is operated, the main processor group 71 controls the motors 31 to 34 of the copying machine 1 and the lamp regulator 8.
1, stop the variable magnification lens block 8, and mirror 5.6.
．． 7, the exposure lamp 4, and other optical systems are stopped.

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 100.
guided into the interior of the copying machine 1 through the window 67 of the holding section 591;
An image is formed 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.

According to the above embodiment, the copy mode 1 is provided with the screen section 61, and the image drawn on the screen 65 of the screen section 61 and the original image on the document table 2 are copied by the copying machine 1 by switching the mirror 9. I'm trying to make it possible. Therefore, the image on the screen 65 and the image on the document table 2 can be switched with a simple configuration, and the copying can be performed almost in the same way as in a normal copying operation.

Furthermore, since the screen section 61 is provided on the document table 2 of the copying machine 1, it has the advantage that no extra space is required.

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.

In the above embodiment, the copying machine and the screen section are described as being removable, but the present invention is not limited to this, and it is also possible to make the screen section slidable on the document table 2.

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 described in detail above, according to the present invention, it is possible to provide an image forming apparatus capable of not only normal copying but also copying of characters, figures, etc. written on a blackboard.

[Brief explanation of drawings]

The drawings show an embodiment of an image forming apparatus according to the present invention, and FIG. 1 is an external perspective view of the image forming apparatus, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is an exploded perspective view of the image forming apparatus. FIG. 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 of the copying machine; and FIG. 6 is a drive unit. FIG. 7 is a perspective view schematically showing the drive mechanism of the optical system, FIG. 8 is a perspective view schematically showing the pointer drive mechanism, and FIG. 9 is the overall control circuit. 10 is a block diagram showing the main processor group, FIG. 11 is a block diagram showing the first sub-processor group, FIG. 12 is a block diagram showing the second sub-processor group, and FIG. 13 is a block diagram showing the pulse A schematic configuration diagram showing a motor control circuit; FIG. 14 is a diagram for explaining the speed control method of a pulse motor; FIGS. 15, 16, and 1
FIG. 7 schematically shows the screen section according to the present invention, 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 section. Figure 1 shows the configuration of the optical system unit.
8 and 19 show the configuration of the above optical system,
FIG. 18 is a top view shown to explain the scanning of the exposure lamp, FIG. 19 is a diagram shown to explain the operation of the optical system,
FIG. 20 is a diagram for explaining the operation of the image forming apparatus, and FIG. 21 is a diagram for explaining the imaging means, which is a main part, taken out. 1... Copy machine, 2... Original table, 9... Mirror, 1
0... Photosensitive drum, 5L+, 592... Holding section, 61... Screen section, 65... Screen, 6
6... Exposure lamp, 68... Rotary solenoid, 71... Main processor group, 74... Lens,
84.85... Pulse motor, 86.87... Winding core, 90... Operation panel, 901-903... Operation keys, 97-100... Mirror, P... Paper. Applicant's Representative Patent Attorney Takehiko Suzue Figure 12 Figure 13 Figure 18 Figure 19

Claims (3)

[Claims] (1) a first scanning means that moves relative to the first document support member and optically scans an image of the document placed on the first document support member; a first optical means that guides the reflected light image from the first document support member scanned by the means to an image carrier to which a charge is applied in advance;
An image forming section comprising a transfer means for forming a reflected light image guided by the first optical means on the image carrier to form a charge pattern, developing the charge pattern and transferring it to the transfer material. A second document support member provided in the image forming section and capable of directly forming and displaying a document image on itself, unlike the first document support member constituting the screen section; a second scanning means that moves relative to the second document support member and optically scans the image formed on the second document support member;
a second optical means for guiding the reflected light image from the second document support member scanned by the scanning means to the image carrier; and a second optical means provided in the image forming section and guided by the second optical means. An image forming apparatus comprising: a switching means for switching between a reflected light image guided by the first optical means and a reflected light image guided by the first optical means to guide the reflected light image to the image carrier. (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 substantially perpendicularly to the first document support member.