JPH0281065A - Image forming device - Google Patents

Abstract

PURPOSE:To improve the editing function of the title device without lowering the sharpness of a written character by providing an editing means editing information written by a writing means. CONSTITUTION:In the case of altering the color of the character area of character information stored in a memory 84, a prescribed key on a console panel 30 is depressed. Then, a CPU 81 possessing the editing means displays the alteration on a display, and simultaneously inverts the bits of the character information stored in the memory 84. Consecutively, the CPU 81 outputs a driving signal to a writing unit driving part 85. It turns on the LED array of the writing unit 71 in an area corresponding to the bits stored in the memory 84 to form a character on a photosensitive body 10, and a developing device 12 develops the character. Thus, the color arrangement of a character writing area can be freely edited.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an image forming apparatus having a writing unit for copying an original image and writing arbitrary characters, for example.

(Prior Art) In recent years, electronic copying machines have been developed that not only copy original images but also write character information such as dates and pages that are separate from the original images.

The electronic copying machine described above sets the character writing mode from the operation panel and manually enters character information such as "date" and "characters." After the manual input, the electronic copying machine switches to the character writing mode and moves the writing unit to a position where character information such as "date" and "characters" is written on the paper. After the electronic copying machine is moved, the LED is turned on in response to the character information to be written at the designated writing position, and the character information is formed together with the copy. The formed character information is developed by a developer and discharged to a paper discharge tray. ■For example, when changing the color scheme of the letter H written by the writing unit as advertisement text information from red to blue, the letter H is developed in red and then blue is superimposed and developed. It is something to do.

(Problems to be Solved by the Invention) Conventional devices, for example, when changing the color scheme of the letter H from red to blue, develop it in red first and then develop it in blue, so the color of the letter H is a mixture of red and blue. Since bubbles form, there is a risk that the clarity of the copied characters will deteriorate, and a countermeasure against this problem has been desperately needed.

The present invention has been made in view of the above, and an object thereof is to provide an image forming apparatus that improves the editing function of the apparatus without reducing the clarity of written characters.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides an image carrier that is movable relative to an image carrier on which an original image is formed by exposing and scanning an original. The gist is to have editing means for editing the desired information written by the writing means for writing the desired information.

(Function) In the image forming apparatus having the above configuration, the image forming apparatus is movable relative to the image carrier (photosensitive drum) on which the document is formed by exposing and scanning the document, and writes desired information on the image carrier. Specify the desired information from the memory that stores the desired information written by the writing means, edit the specified desired information, and immediately invert the bits of the desired information stored in the memory. Therefore, the editing function of the device can be improved.

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

FIG. 1 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.

This document table 2 is provided with a fixed scale 21 that serves as a reference for setting the document, and furthermore, a document cover 11 that can be opened and closed is provided near the document table 2.

The original placed on the original platen 2 is moved back and forth by an optical system consisting of an exposure lamp 4 and mirrors 5, 6, and 7 along the lower surface of the original platen 2 in the direction of arrow a. It is designed to be exposed and scanned. In this case, mirror 6.7 moves at half the speed of mirror 5 so as to maintain the optical path length. The light reflected from the original by the scanning of the optical system, that is, the light reflected from the original by the light irradiation of the exposure lamp 4, is reflected by the mirror 5.6.7, passes through the variable magnification lens block 8, and is further reflected by the mirror 5.6.7. 91 92
93 and guided to the photosensitive drum 10,
An image of the original is formed on the surface of the photosensitive drum 10.

The photosensitive drum 10 rotates in the direction indicated by the arrow in the figure, and first, the surface is charged by the charging device 11, and then the image is exposed to slit light at the exposure section ph.
An electrostatic latent image is formed on the surface. This electrostatic latent image is
2, a toner is attached to the image to make it visible. The developing device 12 is detachably attached to the copying machine main body 1, and code information (not shown) indicating the color of the toner contained therein is provided on the side surface of the developing device 12. When the toner 12 is inserted into the copying machine main body 1, this code information is read by an unillustrated sensor on the copying machine main body 1, and the color of the toner can be determined.

On the other hand, the paper is stored in the selected upper paper feed cassette 13I.
Alternatively, the feed roller 1.4 from the lower paper feed cassette 132
+ 142 and roller pair 151 152 take out the sheet, guide it through a paper guide path 16162 to a pair of registration rollers] 7, and guide it to a transfer section by this pair of registration rollers 17. . Here, the L distribution paper cassettes 131 and 132 are removably provided at the lower right end of the main body 1, and one of them can be selected on the operation panel described later. In addition, each of the above paper feed cassettes 131 132
are each cassette size detection switch 60+
The cassette size is detected by 602. This cassette size detection switch 601 6
02 is composed of a plurality of microswitches that are turned on and off according to the insertion of cassettes of different sizes. Further, a manual feed guide 13a is provided on the upper surface of the paper feed cassette 131.
．． 3a, the paper is manually inserted through the feed roller]
The paper is guided to the pair of rollers 151 by the rollers 4a, and then transported in the same way as the paper fed from the paper feed cassette 131. On the other hand, the paper sent to the transfer section comes into close contact with the surface of the photoreceptor drum 10 at the transfer charger 18, so that the toner image on the photoreceptor drum 10 is transferred by the action of the charger 18. . The transferred paper P is electrostatically peeled off from the photoreceptor drum 10 by the action of one peeling charger and is conveyed by a conveyor belt 20, and is transferred to a fixing roller 21 as a fixing device provided at the end of the conveyor belt 20. The transferred image is fixed by passing through this area. After fixing, the paper is discharged to a tray 25 outside the main body 1 by a pair of delivery rollers 22. 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 residual images with a static elimination lamp 27. Note that 29 is a cooling fan for preventing the temperature inside the main body 1 from rising. Further, the exposure lamp 4 and the mirror 5 are provided in the first carriage 411, and the mirror 6.7 is provided in the second carriage 412.

On the other hand, the first carriage 41. A spot light source 131 that is movable in a direction perpendicular to the direction of movement of the first carriage 411 is provided. This spot light source 131
is provided with a light emitting element that irradiates a spotlight onto the document table 2, and it is possible to specify, for example, an erasing range of the document using this spotlight.

Further, an erasing array 150 is provided between the charger 11 for charging the photosensitive drum 1o and the exposure section ph. In the erasing array 150, a plurality of light emitting elements (not shown) are arranged along the longitudinal direction of the photoreceptor drum 10. When erasing a part of a document, etc., these light emitting elements are connected to the spot light source 131. The light is turned on corresponding to the erasing area designated by , and the electric charge accumulated on the photosensitive drum 1o is removed. Therefore, an electrostatic latent image is not formed in the portion from which the charge has been removed even if it is subsequently exposed to light at the exposure portion ph, so that the document image is erased.

Furthermore, a writing unit 71 is provided between the exposure section ph and the developing device 12. This writing unit 71 not only copies the original image, but also writes necessary characters and the like on the paper on which the original image is formed.

FIG. 2 is a diagram showing the arrangement around the photosensitive drum 10, which is provided opposite the writing unit 71. As shown in FIG.

Around this photoreceptor drum 10, a charging charger 11,
erasing array 150, writing unit 71, developing unit 12,
A charger 18, a stripping charger 19, a cleaner 26, and a static elimination lamp 27 are provided. The photosensitive drum 10
A charging device 11 is provided near the top of the figure, and the surface of the drum 10 is charged. Adjacent to the charger 11 for charging, an erasing array 150 including generation elements is provided in the longitudinal direction of the photoreceptor drum 10 . This erase array 150
removes the electric charge accumulated on the surface of the drum 10 due to the light emission of the light emitting element. Since no electrostatic latent image is formed in this removed portion even if it is exposed by the exposure portion ph, the original image is erased. A second writing unit 71 is provided adjacent to the exposure section ph. This writing unit 7
1 is for writing specified characters or the like at a position specified by the user on a sheet of paper on which an original image is to be formed. A developing device 12 that supplies toner to the surface of the photosensitive drum 1o is provided at the lower right side of the writing unit 71. At the bottom of the figure, a charger 18 is provided to charge the paper P so that it comes into close contact with the photoreceptor drum 1o, and adjacent to this charger 18, a peeling charger 19 is provided to separate the paper P from the photoreceptor drum 1o. It is provided. Peeling charger 1
A cleaner 26 for removing residual toner adhering to the photosensitive drum 1o is provided on the upper left side of the drawing 9.

A static elimination lamp 27 is provided adjacent to the cleaner 26 to erase an afterimage on the surface of the drum 10.

FIG. 3 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
is a display section that displays the operating status of each part and paper jams, etc.
30d is a density setting section for setting the copy density; 30e is a count command key for displaying the total number of copies and the number of copies for each color; 30r is an interrupt key operated when something else is copying while copying; 30g is the same size key to operate when setting the copy magnification to the same size (100%) 3
011 is the magnification key operated when setting the copy magnification
301 is a cassette selection key that is operated to select the upper and lower cassettes 131 and 132. For example, when an edit key 300 (to be described later) is operated and an erase range of the original is specified, the specified erase range etc. is stored in the memory. A mode memory key 301 is operated when storing information or reading out information such as an erase range stored in memory in advance. Reference numeral 301 is an information key operated when obtaining information corresponding to each mote. If this key is operated in such a case, information for clearing the jam will be displayed on a display 30o, which will be described later. 3
0I11 is a function key, and by operating this function key 30L1, it is possible to display what function is set on the display 30o. Reference numeral 30m denotes editing piece-1 which is operated when performing partial erasure, etc., in which a part of the original image is erased and copied. 3°O is a display made of, for example, a liquid crystal dot matrix panel, and this display 30o has the above-mentioned various cows-30e, 30
When r and 30g-n are operated, corresponding displays are displayed. On both sides of the display 300, operation keys 301-304, 305-30, . is installed. Also, 30ρ is the spot light source 1-
This moving gear 30p can be tilted in all directions as shown by arrows 30q to 30t, and when these arrows 30q to 30t are operated, the spot light source 131 moves in the same direction. It is now possible to do so. 30u is a position designation key for inputting the coordinate position indicated by the spot light source 131.

FIG. 4 shows the writing unit 71.

The 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 across these pulleys 74 and 75. The bridge '75 is driven by a motor 77, and when the motor 77 is driven, the writing unit 71 is moved along the photosensitive drum 10 via the timing belt 76. There is.

FIG. 5 shows the configuration of the writing unit 71. A printed wiring board 71a is provided inside the writing unit 71, and a board 711 is provided on the printed wiring board 7],a. A light emitting diode array (hereinafter referred to as an LED array) 71b is provided on the substrate 7], 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. ], the total length A of this LED ear 1b is shorter than the maximum copying width of the photosensitive tram 10, which is 17.2. As shown in FIG. 4, this LED array 71h is connected to 6 LED drive units 107 (not described later) via a flat gable 71 [1] connected to the printed wiring board 71a.
In response to the signal that corresponds to characters, etc. (:λ・1) supplied from (, τ
, Some parts are selectively lit (J is turned on. In addition,
Inside the writing unit 71, there are LED lights 71b.
A light focusing lens 71 . guides the light generated by the light to the surface of the photoreceptor drum 10 . e is provided.

Furthermore, a shutter 71r is provided on the side surface of the writing unit 71, corresponding to the LED array 711), for blocking a part of the incident light Bi that exposes the photosensitive drum 1°. This shutter 718r is connected to the LED array 71b.
When writing characters, etc., the incident light is blocked in a manner corresponding to the writing position of the characters, etc., so that the charges on the portion of the photosensitive drum 10 where the characters, etc. are written are not erased by the incident light Bi.

FIG. 7 shows the structure of the shutter 71r. 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 the shaft 71g.
is engaged with. This rack 71i is connected to a plunger 71k of a solenoid plunger 71j provided inside the writing unit 71.

The solenoid 71 of the solenoid plunger 71j is normally deenergized, and in this state, the plunger 71k is projected from the solenoid 711 by a spring (not shown). Therefore, the shutter 71. f'
is rotated so as to come into contact with the side surface of the writing unit 71, as shown by solid lines in FIGS. 5, 7, and 8, and the incident light B
It is taken out from l. Further, when the solenoid 711 is energized, the plunger 71. k is sucked into the solenoid 711. Therefore, the shutter 71r is inserted into the incident light Bl, as shown by the broken line in the figure, and a part of the incident light Bj 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 Bl blocked by the shutter 73f will be further explained.

As shown in FIGS. 9 and 10, the total length A of the LED array 71b is longer than the width B of the shutter 71f' by δ in both end directions.

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 71r
The incident light Bi is blocked by the photoreceptor drum 10, and the width of the charge remaining on the photoreceptor drum 10 becomes longer than the total length A of the LED array 71b, and the LED array 71b cannot erase all of this charge. Portions corresponding to both ends of the array 711) remain as black lines.

However, as described above, by configuring the total length A of the LED array 711) to be longer than the width B of the shutter 71r by δ in each end direction, it is possible to prevent charges from remaining unerased.

Immediately, as shown in FIG.
In D71c, the part corresponding to the character is turned off, and the part other than the character is turned on. The width C of the character is narrower than the width B of the shutter 71f.

Therefore, within the character width C, L E D 71
In the portion where G is turned off, the charge on the photosensitive drum 10 remains, and when developed, the characters are visualized as shown in FIG. 11. In addition, LED 71 corresponding to both ends of the character width C
Since all of the elements c are lit, the charges in the corresponding parts are erased, and unnecessary black lines are not generated in the parts corresponding to both ends of the shutter 71r.

On the other hand, the shutter 71 rLt is provided closer to the rotational direction of the photoreceptor drum 10 than the LED array 71 - b. Therefore, depending on the relationship between the opening/closing timing of the shutter 71F and the lighting timing of the LED array 71b, only the image corresponding to the tip of the shutter 71f remains.

FIG. 12 shows the LED array 71b as explained in FIG.
Since the image formation of the LED light, which has a total length A, is longer than the width of the shutter 71f by δ in both end directions, the incident light Bl
It is possible to prevent charges from remaining unerased due to In addition, the light emitted from the LED array 71b causes light to be transmitted through the light converging lens 71e.
This prevents unnecessary black lines from being formed on the photoreceptor drum 10 in portions corresponding to both ends of the shutter 71r due to image formation of the ED light.

The rotation timing of the shutter 71r and the lighting timing of the LED array 71b explained in FIGS. 9 and 10 above are as follows.

In FIG. 13, when writing characters etc. in the copied image,
△1° before the shutter 71r is rotated
Array 71b is lit. After this, the shutter 71r is rotated, and the shutter 71f is inserted into the incident light Bi. Here, 1. is the time required until the shutter 71r is completely opened. In this state, when characters, etc. are written and the writing of characters, etc. is finished, the shutter 71f is first closed (time t2), and after the shutter 71r is closed, the LED array 71b is turned off after the elapse of time Δt2. The lights are turned off.

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. 14 shows the configuration of the main parts of the control system.

A CPU (editing means) 81 controls the entire copying machine, and the operation panel 30 is connected to the CPU 81, and the writing unit 71 is connected to the CPU 81.
An instruction to invert or non-invert the bit value of the written character information is input.

Further, the CPU 81 is connected to a memory 84 that stores bits as digital signals of character information written by the writing unit 71 in addresses.

Here, the operation of the CPU 81 having the editing means according to the present invention will be explained using FIGS. 15 and 16. Among the setting keys 301 to 308 on the operation panel 30, the memory 84
When the negative key 302 for editing the character information stored in the
``Negative'' is displayed. Along with the display, the CPU 81 inverts the bit stored in the memory 84 shown in FIG. 16(b) from "0" to "1" and from "1" to rOJ. The character information in the inverted memory 84 is shown in FIG. 16(a).
As shown in the figure, the area of the character H becomes bit "1". On the other hand, when one of the setting keys 301 to 308 on the operation panel 3o is pressed, the positive key 303, which fills the frame of the character information stored in the memory 84 in black and makes the character area white, the CPU 81 causes the display 300 to display ""Positive" is displayed.

Along with the display, the CPU 81 changes the bits of character information stored in the memory 84 from FIG. 16(a) to FIG. 16(b).
).

Writing unit drive unit 85 connected to CPU 81
The memory 8 is driven by a drive signal output from the CPU 81.
Write the character information stored in 4 in L of writing unit 71.
The letter H is formed on the photosensitive drum 10 by lighting the ED array 71b.

FIG. 17 is a diagram showing the formation of paper P to be copied. The image data G of the original is copied onto the center of the paper P, and the writing position W of the characters is copied onto the top edge of the paper P.

FIGS. 18(a) and 18(b) are diagrams showing an example in which character information stored in the memory 84 is formed by the writing unit 71. That is, FIG. 18(a)
16(a) is a diagram formed on paper P when the negative key 302 of the operation panel 30 shown in FIG. 16(a) is pressed. The formed character H is copied at the writing position W of the character in a black character area. - The force cylinder 18 (b) is the same as the figure 16 (b).
3 is a diagram formed on paper P by pressing the positive key 303 of the operation panel 30 shown in FIG. The formed character H becomes white at the writing position W of the character, and the frame of the character becomes black.

In the above example, the bit stored in the memory 84 is “0”.
'' when the bit is ``1'', or black when the bit is ``1'', but for example, for advertising purposes, two colors, red and blue, are used to create the characters in Figure 18(a). Although the H portion is made blue, it is also possible to make the frame of the letter H in FIG. 18(b) red.

Next, the operation of this embodiment will be explained using the processing flowchart of FIG. 19.

First, the staff turns on the main switch to power on the copying machine main body 1. When the main switch is turned on, the CPU 81 displays "mode setting input?" on the display 300 of the operation panel 30 to prompt the staff member to input the mode. When the staff member presses the write mode key, the CPU8
1, the process proceeds to step 110, and if the write mode key is not pressed, the process proceeds to step 140 (step 100).

Proceeding to step 110, the staff member selects, for example, the negative key 30 of the setting keys 30 of the operation panel 30, if the character area of the character information stored in the memory 84 is to be changed to black.
Press 2. When negative key 3゜2 is pressed, CPU8
1, if the bit of character information stored in the memory 84 is "0", it is inverted to "0" if it is rl, J, or rlJ. On the other hand, if the character information bits are not inverted, the CPU
81 outputs a drive signal to the write unit drive section 85 based on the bits stored in the memory 84.

The writing unit driving section 85 turns on the LED array 71b of the writing unit 71 in the area corresponding to the bit "0" stored in the memory 84 to form a character, and the character is developed by the developer 12 (step 110-1
30).

When the process proceeds to step 140, the CPU 81 switches to the normal copy mode and performs a copying operation (step 1
40).

As described above, since the color scheme of the writing character area can be edited as desired, the editing function of the device can be improved.

Note that this invention is not limited to the above embodiments,
Of course, various modifications can be made without departing from the gist of the invention.

[Effects of the Invention] As explained above, according to the present invention, an apparatus can be used without reducing the clarity of characters written by a writing means for writing desired information on an image bearing member (photoreceptor drum). You can improve your editing functions.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of the image forming apparatus of the present invention, FIG. 2 is a main part view of the side sectional view shown in FIG. 1, and FIG.
The figure is a plan view showing the configuration of the operation panel, Figures 4 and 5 each show the writing unit 1-, Figure 4 is a perspective view of the main part, and Figure 5 shows the writing unit. 6 is a plan view showing the structure of the LED array, FIGS. 7 and 8 each show the structure of the shutter, and FIG. 7 is a perspective view of the main part. , Fig. 8 is a side view of the main part, Figs. 9 to 12 show the relationship between the shutter and the LED array, respectively, Figs. 9 and 10 are schematic diagrams of the main part, and Fig. 11 is a side view of the main part. Perspective view of main parts, 1st
Fig. 2 is an external view of the main parts, Fig. 13 is a diagram shown to explain the relationship between the rotation timing of the shutter and the lighting timing of the LED array, Fig. 14 is a configuration diagram showing the control system, and Fig. 15
16 is a diagram showing the operation of the operation panel, FIG. 16 is a diagram showing character information in memory, FIGS. 17 to 18 are diagrams showing examples of edited character information, and FIG. 18 is a diagram showing the operation of the present invention. It is a figure which shows the flowchart which shows. 1... Copying machine main body, 10... Photosensitive drum, 12.
-Developer, 30...Operation panel, 71...Writing unit, 71b...LED array, 71e...Light focusing lens, 81...CPU, 84...Memory, 85
...Writing unit drive section, W...Writing position.

Claims (1)

[Scope of Claims] An image carrier on which a document image is formed by exposing and scanning a document;
An image forming apparatus comprising a writing means that is movable relative to the image carrier and writes desired information onto the image carrier, an editing means that edits the desired information written by the writing means. An image forming apparatus comprising: