JPH0253088A - Image forming device - Google Patents

Abstract

PURPOSE:To copy an original picture and to additionally write scale information by providing a writing means writing scale information on an image carrier and a generating means generating scale information written by the writing means. CONSTITUTION:The image forming device is constituted of the writing means 1 writing scale information on the image carrier 10, and the generating means 88 generating scale information written by the writing means 71. Namely, the scale information written by the writing means 71 is generated by the generating means 88, whereby an original image is formed and the scale information can be written. The writing means 71 can write the scale information at any location of the original image formed on the image carrier 10. In the case of writing the scale information with the writing means 71, light made incident on the image carrier 10 can be shielded in response to the writing position of the scale information. Thus, the original image can be formed on material to be transferred, and the scale information can be written as well.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) This invention relates to image formation in electronic copying machines, etc., which are capable of copying original images and writing arbitrary characters, for example. Regarding equipment.

(Prior Art) Originally, electronic copying machines simply transferred original images onto paper (transfer material), but there has been a growing demand for writing digital elements on images copied by electronic copying machines. is increasing. Therefore, recently, electronic copying machines have been developed that are capable of writing information such as characters other than the original image onto the copied image.

In this type of copying machine, required information is written onto a photoreceptor drum (image carrier) by irradiating a display image on an operation panel.

However, in the above-mentioned copying machine, the date is written as necessary information, and the degree of freedom is low.

(Problems to be Solved by the Invention) This invention solves the problem of not only copying original images but also the desire to have a high degree of freedom in writing additional information. An object of the present invention is to provide an image forming apparatus that can perform an operation of forming an original image and write scale information onto a transfer material on which an original image is formed.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a scanning means for exposing and scanning a manuscript, a Song carrier on which a manuscript image guided by the scanning means is formed, and an image carrier. In an image forming apparatus comprising a developing means for developing an image formed on the image carrier, and a transfer means for transferring the image developed by the developing means onto a transfer material, a writing means for writing scale information on the image carrier; , and generating means for generating scale information to be written by the writing means.

Further, the writing means includes a light emitting diode array having a width equal to or less than the maximum image forming range of the image carrier and an imaging element, and is provided movably along the image forming position of the image carrier. be.

Further, the writing means is provided with a shutter that selectively blocks light incident on the image carrier, corresponding to a writing position of the scale information.

(Operation) The present invention provides a writing means for writing scale information on the image carrier, and causes the generating means to generate the scale information written by the writing means, thereby writing the scale information together with the operation of forming the original image. It has been made possible to do so.

The writing means is capable of writing the scale information at any location of the original image formed on the image carrier, and when writing the scale information with the writing means, the writing position of the scale information is determined. Correspondingly, light incident on the image carrier is blocked.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 7 schematically shows 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. An automatic document feeder 3 is provided above the document table 2 so as to cover the document table 2 so as to be openable and closable.The automatic document feeder 3 automatically moves the document to the exposure position on the document table 2. It is designed to be transported to

The original set at the exposure position on the original table 2 is moved by an optical system (scanning means) consisting of an exposure lamp 4, a mirror 5, and 6.7 in the direction of arrow a along the lower surface of the original table 2. As a result, exposure scanning is performed during the reciprocation. In this case, mirror 6.7 moves at half the speed of mirror 5 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. After being reflected by 7, the variable magnification lens block 8
Pass through and then go to Mirror 91.9□.

93 and is reflected by the photosensitive drum (image carrier) 10
The image of the document is formed on the surface of the photosensitive drum 1o.

The photosensitive drum 10 rotates in the direction indicated by the arrow in the figure, and the surface is first charged by the charging device 11, and then,
By subjecting the image to slit exposure at the exposure section (image forming position) ph, an electrostatic latent image is formed on the surface. This electrostatic latent image is visualized by applying toner by a developing device (developing means) 12. The developing device 12 is
It can be attached to and detached from the copying machine main body 1. Hood information (not shown) indicating the color of the stored toner is provided on the side surface of the developing device 12. When the developing device 12 is inserted into the copying machine main body 1, a This code information is read by a sensor and the color of the toner can be determined.

On the other hand, the paper (transfer material) is delivered from the selected upper paper feed cassette 131 or lower paper feed cassette 132 to the feed roller 1411 or 142, the roller pair 157,
Alternatively, the sheets are taken out one by one by the paper guide path 161 or 162 and then passed through the registration roller pair 17.
and is sent to the transfer section by this pair of registration rollers 17. Here, the paper feed cassette 13. ．． 132 is removably provided at the lower right end of the main body 1, and either one can be selected on the operation panel described later. In addition, each of the paper feed cassettes 13. 132, the cassette size is detected by a cassette size detection switch 60□602. The cassette size detection switches 60+, 60□ are composed of a plurality of microswitches that are turned on and off in accordance with the insertion of cassettes of different sizes.

Furthermore, a manual feed guide 13a is provided on the upper surface of the paper feed cassette 131.
The paper manually inserted through the feed roller 14a
The sheet is guided to the pair of rollers 151 by the roller pair 151, and is then conveyed in the same manner as sheets fed from the sheet feed cassette 13□.

The paper sent to the transfer section is transferred to a transfer charger (transfer means) 1.
By coming into close contact with the surface of the photoreceptor drum 10 at the portion 8 , the toner image on the photoreceptor drum 10 is transferred by the action of the charger 18 . The transferred paper is electrostatically peeled off from the photosensitive drum 10 by the action of the peeling charger 19 and conveyed by the conveyor belt 20. Then, the transferred image is sent to a pair of fixing rollers 21 as a calibrator provided at the end thereof, and the transferred image is fixed by passing therethrough.

The paper after this determination is delivered to the main body 1 by a pair of delivery rollers 22.
It is designed to be discharged onto an outside tray 25.

After the transfer, the photosensitive drum 10 is returned to its initial state by removing residual toner on the surface with a cleaner 26 and erasing any afterimages with a static elimination lamp 27. Further, 29 is a cooling fan for preventing the temperature inside the main body 1 from rising.

On the other hand, the exposure lamp 4 and the mirror 5 are provided in the first carriage 41, and the mirror 6.7 is provided in the second carriage 4.
It is provided in 12.

The first carriage 411 includes a first carriage 41.
Spot light source 1 movable in a direction perpendicular to the direction of movement of
31 are provided. This spot light source 131 has
A light emitting element that emits a spot light is provided on the document table 2, and by using this spot light, it is possible to specify, for example, an erasing range of the document.

Further, an erasing array 150 is provided between the charger 11 for charging the photosensitive drum 10 and the exposure section ph. A plurality of light emitting elements (not shown) are arranged in the erasing array 150 along the longitudinal direction of the photoreceptor drum 10. When erasing a portion of a document, these light emitting elements are activated by the spot light source 131. The photoreceptor drum 1 is turned on in accordance with the specified erasing range.
It is designed to remove the zero charge. In other words, an electrostatic latent image is not formed in the portion from which charge is removed by lighting the light emitting element, even when exposed at the exposure portion ph.

Therefore, the original image will be erased.

Further, a writing unit (writing means) 71 is provided between the exposure section ph and the developing device 12. This writing unit 71 writes information such as required characters onto a sheet of paper on which an original image is formed by copying the original image. Details of this writing unit 71 will be described later.

FIG. 8 shows the first carriage 411. That is, the first carriage 411 is provided with a guide shaft 130 along the lamp 4 in a portion where the light of the exposure lamp 4 is blocked, and a spot is provided on the guide shaft 130 as a means for indicating the erasing range of the original. A light source 131 is provided movably. This spotlight? R131 is composed of a light emitting element such as a light emitting diode or a lamp provided opposite to the document table 2, and a lens that irradiates the light generated from the light emitting element onto the document table 2 as a spot light. This spot light has a brightness that allows it to pass through a document set on the document table 2, which is, for example, as thick as a postcard.

The spot light source 131 also includes a timing belt (toothed belt) 13 disposed along the guide shaft 130.
It is connected to 4. This timing belt 134 is
Pulley 136 provided on the rotating shaft of pulse motor 135
A hook is passed between the driven pulley 137 and the driven pulley 137. Therefore, by rotating the pulse motor 135, the spot light source 131 is moved in a direction perpendicular to the scanning direction of the first carriage 411 (in the direction of arrow X in the figure).

Further, a first carriage 411 located at the side end of the pulse motor 135 of the guide shaft 130 includes a spot light source 13.
A position sensor 138 consisting of a microswitch that detects the initial position of 1 is provided, and this position sensor 138
The initial position of the spot light source 131 is detected by.

Further, the first carriage 411 is driven by the motor 43 along a guide rail 422 in the direction of the arrow y in the figure.

FIG. 9 shows an operation panel 30 provided on the main body 1 of the copying machine. 30a is a copy key for commanding the start of copying; 30b is a numeric keypad for setting the number of copies, etc.; 30c
30d is a density setting section for setting the copying density; 30e is a count command key for displaying the total number of copies and the number of copies for each color; 30f is a copying key. Interrupt key 30g is used when a person in the pond makes a copy. 30g is the same size key used when setting the copy magnification to 100%. 3
0h is a magnification setting key operated when setting the copy magnification. 301 is the upper and lower cassette 13. ．． This is a cassette selection key operated when selecting 132.

30, for example, by operating an edit key 30n, which will be described later.
This mode memory key is operated to store the specified erasure range in the memory when the erasure range of the document is specified, or to read out information such as the erasure range stored in the memory in advance. Reference numeral 30 is an information key that is operated to obtain information corresponding to each mode. For example, when this key is operated when a paper jam occurs, information for clearing the jam will be displayed on the display 30o, which will be described later. It is now possible to do so.

30m is a function check key, and when the function check key 30m is operated, the display 30o can display what kind of function is set. Reference numeral 30n denotes an editing key that is operated when performing partial erasure, in which a part of the original image is erased and copied. Reference numeral 30o is a display device consisting of, for example, a liquid crystal dot matrix panel, and when the various keys 30e to 30i and 30k to 30n are operated, a corresponding display is displayed on the display device 30o. . On both sides of the display 30o are operation keys 301 to 301 for selecting various functions displayed on the display 300.
304, 305-308 are arranged.

30p is a movement key for moving the above-mentioned spot light source 131, and this movement key 30p moves arrows 30q to 3.
As shown at 0t, it can be tilted in all directions, and when these arrows 30q to 30t are operated, the spot light source 131
is moved in the same direction as this. 30
u is a position designation key for inputting the coordinate position indicated by the spot light source 131. Further, the movement key 30p is
For example, when specifying the writing position of information by the writing unit 71, it is also used as a moving key for the cursor displayed on the display 30o, and in this case, the position specifying key 30u is used as the cursor movement key. It is used as a position specification key to input the coordinate position indicated by .

FIG. 10 shows the writing unit 71. This writing unit 71 is movably provided on guide shafts 72 and 73 disposed along the longitudinal direction of the photosensitive drum 10. Pulleys 74 and 75 are provided near both ends of the guide shafts 72 and 73, and a timing belt 76 to which the writing unit 71 is fixed is stretched between these pulleys 74 and 75. The pulley 75 is driven by a motor 77, and by driving the motor 77, the writing unit 71 is moved along the photosensitive drum 10 via the timing belt 76. .

FIG. 11 shows the configuration of the writing unit 71. Inside this writing unit 71 is a printed wiring board 7.
1a is provided, and this printed wiring board [71a has a substrate 71
1 is provided. A light emitting diode array (hereinafter referred to as an LED array) 71b is provided on the substrate 711, facing the photosensitive drum 10, as shown in FIG.

This LED array 71b is composed of a plurality of LEDs 71c arranged along the longitudinal direction of the photoreceptor drum 10, and the total length A of this LED array 71b is, for example, 1/1/2 of the maximum copying width of the photoreceptor drum 10. It is shorter than 2. As shown in FIG. 10, this LED array 71b is selectively activated in response to a signal corresponding to write information supplied from an LED drive circuit, which will be described later, via a flat cable 71d connected to the printed wiring board 71a. It is now lit.

Further, inside the writing unit 71, a light focusing lens (imaging element) 71e is provided that guides the light generated by the LED array 71b to the surface of the photoreceptor drum 10.

Furthermore, a shutter 71f is provided on the side surface of the writing unit 71, corresponding to the LED array 71b, for blocking a part of the incident light Bi that exposes the photosensitive drum 10. This shutter 71f corresponds to the writing position of the characters, etc., so that when writing characters, etc. using the LED array 71b, the charges on the portion (ph) of the photosensitive drum 10 where the characters, etc. are written are not erased by the incident light Bj. This is to block the incident light Bi.

FIG. 13 shows the configuration of the shutter 71f.

A shaft 71g is provided at the base end of the shutter 71f, and this shaft 71g is rotatably provided on the side surface of the writing unit 71. A pinion 71h is provided at one end of this shaft 71g, and this pinion 7th is provided inside the writing unit 71 and the shutter 7
It is engaged with a rack 71i exposed on the side surface to which 1f is attached. This rack 71i includes the writing unit 7
1 is connected to a plunger 71k of a solenoid plunger 71j provided inside the solenoid plunger 71j. The plunger 71 of the solenoid plunger 71j is normally deenergized, and in this state, a spring (not shown) causes the plunger 71k to close the solenoid 71. It protrudes from e. Therefore, the shutter 71f is
As shown by the solid line in FIG. 14, it is rotated so as to come into contact with the side surface of the writing unit 71, and is retreated out of the optical path of the incident light Bi. Also, solenoid 711! When energized, plunger 71k is drawn into solenoid 71. Therefore, the shutter 71f is inserted into the incident light Bi, as shown by the broken line in the figure, and a part of the incident light Bi is blocked.

Next, the photosensitive drum 1 is turned on by the LED array 71b.
The relationship between the image formed on 0 and the incident light Bi blocked by the shutter 71'f will be further explained.

As shown in FIGS. 15 and 16, the total length A of the LED array 71b is longer than the width B of the shutter 71f by δ in each end direction. This means that if the width B of the shutter 71f is equal to or shorter than the total length A of the LED array 71b, the shutter 71f will cause the incident light Bi to
is blocked, and the width of the charge remaining on the photoreceptor drum 10 is L
It is longer than the total length A of the ED array 71b. Then, L.E.
It becomes impossible to erase all of this charge by the D array 71b. Therefore, when developed, portions corresponding to both ends of the LED array 71b remain as black lines.

However, as mentioned above, the total length A of the LED array 71b is
By making the width B of the shutter 71f longer by δ in each end direction, it is possible to prevent charges from remaining unerased.

That is, as shown in FIG. 16, the portions of the LEDs 71c of the LED array 71b that correspond to written information such as characters are turned off, and the portions other than the written information are turned on. In this case, the width C according to the written information is narrower than the width B of the shutter 71f. Therefore, the width of the written information C
In the portion where the LED 71c is turned off, the charge of the photosensitive drum 10 remains. Therefore, when this is developed, it is converted into a yn image according to the written information, as shown in FIG. Furthermore, all the LEDs 71c corresponding to both ends of the width C of the write information are lit. For this reason,
The charges in the corresponding portion are erased, and the shutter 71f
No unnecessary black lines will be generated in the portions corresponding to both ends of .

Further, the shutter 71f is provided closer to the LED array 71b than the LED array 71b in the rotational direction of the photosensitive drum 10. Therefore, the opening/closing timing of the shutter 71f and the LE
Depending on the lighting timing of the D array 71b, the image corresponding to the tip of the shutter 71f may remain. Therefore, the rotation timing of the shutter 71f,
The lighting timing of the LED array 71b is set as follows.

In FIG. 18, when writing characters etc. in a copy image, LE is
D array 71b is lit.

Thereafter, the shutter 71f is rotated and inserted into the incident light Bi. Here, tl is shutter 7
This is the time required for 1f to be completely opened. In this state, when writing characters, etc., and finishing writing, the shutter 71f is first closed (t2 time), and after the shutter 71f is closed, the LED array 71b is turned off after Δt2 time has elapsed. It has become so. By controlling the lighting of the LED 71b at such timing, it is possible to prevent the image corresponding to the tip of the shutter 71f from remaining unerased.

FIG. 19 shows the configuration of the main parts of the control system. The control unit 81 controls the entire copying machine, and the automatic document feeder 3 and the operation panel 3o are connected to the control unit 81. A character generator 82 generates a character pattern consisting of a plurality of dots, a barcode generator 83 similarly generates a barcode composed of a number of rows of dots, and a scale (scale information) similarly composed of a plurality of dots. A scale generator (generating means) 88, a memory 84 in which operating programs for the control section 81, etc. are stored, a motor 135 for driving the spot light source 131, a first carriage 41. a driving motor 43,
A motor drive circuit 85 for driving and controlling the drive motor 77 of the writing unit 71, a solenoid 71 for driving the shutter 71f. Solenoid drive circuit 86 that drives and controls e.
, an LED that controls lighting of the LED array 71b in response to a signal corresponding to write information supplied from the character generator 82, barcode generator 83, and scale generator 88.
A drive circuit 87 is connected.

Next, the operation of the above configuration will be explained with reference to the flowchart shown in FIG.

In the normal standby state, the display 30o of the operation panel 30 shows the selected copy magnification "100%" and the selected paper size rA4J, as shown in FIG. 2(a).
, and the character writing mode selection display "Character writing" are displayed (step 5TI). In this state, the other keys 30g to 30i on the operation panel 30,
When keys 30k to 30n are operated, the display state of the display 30o is changed according to the operated key.
The required mode can be set (step ST2
．． 3). In addition, in this display state, the copy key 30a
If is operated, a copying operation is performed according to the set copying magnification and paper size (step ST4.5).

On the other hand, when the operation key 304 corresponding to "character writing" is operated, a character writing mode is set (step 5
T6). In this character writing mode, the display 30
The display state of 0 is switched from the state shown in FIG. 2(a) to the state shown in FIG. 2(b) (step 5T7). This display 30
0 corresponds to the operation keys 301 to 304, respectively.
"Date" that allows you to write the date along with the copied image
, "Character" on which you can write the required characters, "Barcode" on which you can write the required barcode, "Telephone number" on which you can write the required telephone number, for example, in the form of a barcode. is displayed, and the operation key 30. is displayed. Corresponding to this, "Scale" on which the required scale (measure information) can be written is displayed, "Erase" is displayed corresponding to the operation key 306, and "Cancel" is displayed corresponding to the operation key 308. There is. In this display state, when the corresponding operation keys 301 to 306 are operated, the display state of the display 30o is switched to the display state corresponding to the selected mode (step 5T8).

Further, when the operation key 30g corresponding to "Cancel" is operated, the display state shown in FIG. 2(a) is restored (step 5T9). Note that in any of the display states shown below, when the operation key 30B corresponding to "Cancel" is operated,
The display returns to the one shown in FIG. 2(a).

Only the case where the operation key 305 corresponding to "Scale" is operated in the display state shown in FIG. 2(b) will be described.

In step ST8, when the operation key 30s is operated, the display state of the display 300 is switched to the state shown in FIG. 3(c) (step 5TIO). That is,
On the display 300, a message prompting the user to input the writing position, a cursor 309 indicating the writing position on the original or paper, and "Cancel" are displayed. The cursor 309 is moved, for example, by operating the movement key 30p, and by moving the cursor 309 to a desired position and operating the position designation key 30u, the specified location is marked with a broken line. As shown in (displayed).

Once the writing position has been specified in this way,
The display state of the display 300 is switched to the scale type selection display shown in FIG.
~13). In this display state, the required operation keys 30
2,303,30b.

When 307 is operated, a corresponding scale selection operation is performed.

On the other hand, when the scale type selection operation is completed in the display state shown in FIG. 2(d), the display state changes to the same state as shown in FIG.
) (steps 5T13 to 16)
). That is, the display 30o includes, for example, the numeric keypad 3.
An instruction to input the pitch of the scale from 0b is displayed, and "Cancel" is also displayed. In such a display state, for example, when a pitch is input from the numeric keypad 30b, the pitch is displayed on the display 3001 as shown by the broken line (steer knobs 5T16-18).

In this way, when the scale pitch input operation is completed, the motor drive circuit 8
The motor 77 is driven by the writing unit 71.
is moved to the position xl as shown in the figure (step 19).

In this state, when the copy key 30a is operated (step 5T20), a copying operation is started (step ST21). In this copying operation, when the exposure scanning position of the original OG approaches the designated writing start position (yt), the LED drive circuit 87 causes the LED array 7 to
All LEDs 71c of 1b are lit (step 5T22)
When Δt1 time elapses in this state, the solenoid 71 is energized by the solenoid drive circuit 86, and the shutter 71f is rotated to enter the incident light Bi (step 5T2).
3). Then, when time t1 has elapsed, the LED array 71
b is selectively lit according to the written information (step 5T24).

That is, in the scale generator 88, a pattern corresponding to the type and pitch of the scale is generated, and part of the generated pattern, f4, is sequentially supplied to the LED array 71b via the LED drive circuit 87. Ru. Then, the LED 7 of the part corresponding to χ・1 to the above pattern
When 1C is turned off, that is, the lighting is controlled as shown in FIG. 4, charges 17 corresponding to the above pattern are left on the photosensitive drum 10.

In this way, when writing of the scale by the LED array 71b is completed, the solenoid 71 is deenergized by the solenoid drive circuit 86, and the shutter 71f is retracted from the optical path of the incident light Bi (step 5T25). After the Nyatta 71f is completely removed from the optical path, Δt2
When the time has elapsed, the LED array 71b is turned off by the LED drive circuit 87 (step 5T26).

The scale formed on the photosensitive drum 10 along with the copying of the original image is then developed by the developing device 12, transferred and fixed onto the paper, and discharged to the paper discharge tray 25 of the copying machine main body 1. When the copying operation is completed, the display on the display 30o of the operation panel 30 is returned to the state shown in FIG. 2(a) (step 5727 to step 5TI).
.

FIG. 5 shows the image copied as described above, in which the original image (the shaded area in the figure) is formed on the paper P, and the scale SC is written at the specified position. . In particular, in the case of this kind of scale SC, paper P
This is useful as a guideline when adding graphs, etc., or when aligning added text vertically.

FIG. 6 shows the scale SC written on the paper P together with the original image (shaded area in the figure). In the case of this type of scale SC, it is effective because it can be used as a guide for the dimensions and reduction ratio of a real thing such as a copied diagram or map.

According to the above embodiment, a writing unit for writing a scale on the photoreceptor drum is provided, and the scale to be written by the writing unit is generated by a scale generator, so that the scale can be written at the same time as the document image forming operation. I'm trying to make it possible. The scale can then be written anywhere on the original image formed on the photosensitive drum.

In other words, a movably provided writing unit is moved to the writing position of the scale, a part of the incident light is blocked by a rotatably provided shutter on the writing unit, and an LED array is placed on the scale in the blocked portion. It is possible to write the scale generated by the generator. This makes it possible to copy the original image and write the scale at any location on the original image. Therefore, when adding text or graphs to a copied image, such as a report, for example, when indicating the actual dimensions of a figure, or when indicating the scale of a map, etc.
It is cheap and useful. Therefore, it is possible to write the scale using a normal copying machine,
The degree of freedom of additionally writable information can be increased.

In addition, since the scale as a digital element can be written with a normal copying machine along with the copying operation,
Copying speed is fast, it is relatively inexpensive, and moreover, reliable writing is possible.

In the above embodiment, the writing position is specified on the display of the operation panel, but is not limited to this; for example, the writing position may be specified on the document set on the document table using a spot light source. It's okay. In this case, the writing position can be specified easily and reliably.

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

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide an image forming apparatus that can perform the operation of forming an original image and write scale information on a transfer material on which an original image is formed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a flowchart for explaining the operation, FIG. 2 is a diagram showing an example of a display on a display, and FIG. 3 is an example of a writing position. 4 is a diagram showing an example of lighting control of an LED array, FIGS. 5 and 6 are diagrams each showing an example of a copied image, and FIG. 7 is a diagram showing an example of a copying machine to which the present invention is applied. A side sectional view, FIG. 8 is a perspective view showing the configuration of the spot light source,
Fig. 9 is a plan view showing the configuration of the operation panel, Fig. 10 is a perspective view showing the writing unit, Fig. 11 is a side view showing the configuration of the writing unit, and Fig. 12 is a top view showing the configuration of the LED array. 13 and 14 respectively show the structure of the shutter. FIG. 13 is a perspective view of the main part, FIG. 14 is a side view of the main part, and FIGS. 15 to 17 are the shutter configurations. Figures 15 and 16 are schematic diagrams of the main parts, Figure 17 is a perspective view of the main parts, and Figure 18 shows the relationship between the rotation timing of the shutter and the L;
FIG. 19, a diagram shown to explain the relationship between lighting timings of the ED array, is a configuration diagram showing a control system. DESCRIPTION OF SYMBOLS 1... Copying machine main body, 10... Photosensitive drum (image bearing member) 12... Developing device (developing means) 18... Transfer charger (transfer means) 30... Operation panel, 30o
...Display device, 71...Writing unit (writing means), 71b...LED array (light emitting diode array), 71e...Light converging lens (imaging element), 71f
...Shutter, 81...Control unit, 88...Scale generator (generating means), Bi...Incoming light. Applicant's agent Patent attorney Takehiko Suzue (a) (b) (C) 30° (d) (e) Figure 2 Figure 4 Funeral diagram Figure 14/ To 1b Figure 16 Figure 17 figure

Claims (3)

[Claims] (1) A scanning means for exposing and scanning a document; an image carrier on which an image of the document guided by the scanning means is formed; a developing means for developing the image formed on the image carrier; An image forming apparatus comprising a transfer means for transferring a developed image onto a transfer material, a writing means for writing scale information on the image carrier, and a generating means for generating scale information to be written by the writing means. An image forming apparatus comprising: (2) The writing means is composed of a light emitting diode array having a width equal to or less than the maximum image forming range of the image carrier and an imaging element, and is provided movably along the image forming position of the image carrier. The image forming apparatus according to claim 1, characterized in that: (3) The image forming apparatus according to claim 1 or 2, wherein the writing means includes a shutter that selectively blocks light incident on the image carrier in accordance with a writing position of the scale information. .