JPS625272A - Image forming device - Google Patents

Abstract

PURPOSE:To delete the optional part of an original picture and to confirm the deleting scope by irradiating the spot light to the orignal picture, designating the deleting scope and deleting the charge of the deleting scope at the time of forming the picture. CONSTITUTION:The luminance of the spot light from a spot light source 131 is the one which can transmit the original on an original platen 2. When the operating key is pushed down, a pulse motor 135 is driven, the light source 131 is shifted in the X direction of an arrow, the pulse motor not shown in the figure is driven and the light source 131 is shifted in the Y direction. Consequently, while the operator visually watches the spot light by the light source 131 to transmit the original, the deleting scope is designated. The position on the original picture of the spot light is detected by counting the number of the driven pulse of the pulse motor. By the deleting array arranged approximate to the photosensitive body drum at the time of forming the picture, the charge corresponding to the detected deleting scope is deleted and the unnecessary part of the original is deleted.

Description

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

[Technical background of the invention and its problems]

Generally, an electronic copying machine has the function of copying an original image onto paper as is, or enlarging or reducing the original image and making a copy.

By the way, there may be unnecessary parts in the N draft image. However, conventional copying machines cannot selectively erase and copy original images.

In addition, it would be useful for practical purposes if it were possible to confirm the specified erasure range after specifying the erasure range for the original image.

[Purpose of the invention]

The invention was made based on the above circumstances,
The purpose is to provide a surface image forming apparatus that can specify and erase any part of a document image and also allow confirmation of the specified erasing range.

[Summary of the invention]

In this invention, for example, a document image is irradiated with stub light, this stub light is moved to specify an erasing range, and a photoreceptor drum is irradiated with light corresponding to this designated erasing range. In addition to erasing the electrostatic latent image or charge and forming an image, the first image is also used as a standard for normal copying on the document table.
A document scale is provided, and a second document scale is provided as a reference when specifying trimming, and the document after specifying the trimming range with the second document scale is transferred to the first document scale side for copying. The structure is as follows.

[Embodiments of the invention]

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

1 and 2 schematically show an image forming apparatus, such as a copying machine, according to the present invention.

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. On both the left and right sides of this document table 2, there are first and second rows that serve as standards for setting the document. A second document scale 1 m2 thick is provided, and a document cover 1 which can be opened and closed is provided near the document table 2.
and work table 1. is provided. and,
The original set on the original platen 2 is transported by an optical system consisting of an exposure lamp 4 and mirrors 5, 6.7 as it reciprocates 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, the mirror 6.7 moves at the speed of the ring of the mirror 5 so as to keep the optical path length constant. The light reflected from the original by the scanning of the optical system and the light reflected from the original by the light irradiation of the light exposure run f4 are reflected by the mirror 5°6.7, and then passed through the variable magnification lens block 8. The light is reflected by mirror 9 and guided to photoreceptor drum 10, so that an image of the document is formed on the surface of photoreceptor drum 100.

The photosensitive drum 1o rotates in the direction of arrow C, and its surface is first charged by a charging device 11, and then an electrostatic latent image is formed by exposing the original image to slit light. The latent image is made visible as toner is applied by the developing device 12. On the other hand, the paper (image forming object) P is transferred from the selected upper paper feed cassette, tray 13 @ or lower paper feed cassette 14 to the delivery row 2.
16 or 16, one sheet at a time is taken out, and the paper guide path 17
Alternatively, the recording medium is guided through the recording medium 18 to a pair of registration rollers 19, and sent to a transfer section by the pair of rollers 19. Therefore, each of the paper feed cassettes 13 and 14 is
It is removably provided at the lower right end of the main body 1, and has an operation function J? which will be described later. It is now possible to choose either force or buttocks in the flannel. In addition, each of the above paper feed cassettes 13,
14 is the cassette size detection switch, Chiro 0t, 6 respectively.
0. The cassette size is detected by

This detection switch 60K, 60. It consists of multiple microphone switches that are turned on and off depending on the insertion of cassettes and cassettes of different sizes.

On the other hand, the paper P sent to the transfer section is transferred by being brought into close contact with the surface of the photoreceptor drum 1o at the transfer charger 2o.
The toner image on the photosensitive drum 10 is transferred by the action of the charger 2o. The transferred paper P is peeled off from the photosensitive drum 1o by the action of a peeling charger 210, conveyed on a 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. , where the transferred image is fixed. After fixing, the paper P is discharged to a tray 25 outside the main body 1 by a pair of paper discharge rollers 24. Further, after the photosensitive drum 10 has been transferred, the charge is removed by the charger 26, residual toner on the surface is removed by the cleaner 22, and the afterimage is erased by the charge removal lamp 2B, so that the drum 10 returns to its initial state. ing. Note that 29 is a cooling 7 amp for preventing the temperature inside the main body 1 from rising.

FIG. 3 shows the operation panel 3° provided on the main body 11fC. 30. is a copy key that commands the start of copying, 3
0. 30 is a numeric keypad for setting the number of copies, etc. 3 is a display section that displays the operating status of each section and paper jams, etc.;
0. is a cassette selection key for selecting upper and lower paper feed cassettes 1B and 14; 30. 306 is a magnification setting key for setting the enlargement/reduction magnification of copying in a predetermined relationship; 30 is a zoom key for steplessly setting the enlargement/reduction magnification; 30- is a cassette display section for displaying the selected cassette; A display section that displays the set magnification, 30° is a density setting section that sets the copy density, 30m, 30b, 30e, 30d
(1) indicates the erasure position of the original, which will be described later; (30) is an operation key for moving the light source, and (30f) is a position designation key for inputting the coordinate position indicated by the light source.

sog is an erasure range designation key for specifying the erasure range at a designated position, and jOh is a check key for confirming the erasure designated range.

FIG. 4 shows an example of the configuration of a drive source for each drive section of the copying machine configured as described above, and is composed of the following motors. That is, 31 is a lens motor, which is a motor 5 for moving the position of the lens block 8 in order to change the magnification. Reference numeral 32 denotes a mirror motor, which connects the mirror 5 and mirror 6 to change the magnification.
This is a motor for changing the distance (optical path length) between the two. A scanning motor 33 is a motor for moving the exposure lamp 4, the mirror 5, and the mirror 6.7 for cumulative scanning. 34 is the shutter motor,
This is a motor for moving a shutter (not shown) for adjusting the charging width of the photoreceptor drum 10 by the charger JJIC during zooming. A developing motor 35 is a motor for driving the developing roller of the developing device 12 and the like. 36 is a drum motor, and the photosensitive drum 10
This is a motor for driving. 37 is a fixing motor, which connects the paper conveyance path 22, the fixing roller pair 23 and the paper eject o.
- A motor for driving the pair 24. Reference numeral 38 denotes a paper feed motor, which is a motor for driving the delivery rows 215, 1g. Reference numeral 39 denotes a paper feed motor, which is a motor for driving the register a-ra pair 19. 4o
A fan motor is a motor for driving the cooling fan 29.

FIG. 5 shows a drive mechanism for reciprocating the optical system. That is, the mirror 5 and the exposure lamp 4 are placed in the first carriage 411, and the mirror 6.7 is placed in the second carriage 41. These carriers are respectively supported by 41. .

41, guide rail 42□, 42. It is guided by and can freely move in parallel in the direction of arrow a. That is, the four-phase pulse motor 33 drives the pulley 43. An endless belt 45 is stretched between the pulley 43 and the idle pulley 44, and in the middle of the belt 45 there is a first belt that supports the mirror 5, and a second belt that supports the mirror 6.1. , Ji41
The guide portion 46 of the rail 423 of the rail 42. Two pulleys 47 and 42 are rotatably provided apart from each other in the axial direction, and a wire 4 is connected between these pulleys 47 and 47.
8 is hanging.

One end of this wire 48 is fixed to a fixed part 49, and the other end is fixed to the fixed part 49 via a coil spring 50. Further, one end of a first carriage 411 is fixed to a midway portion of the wire 48. Therefore, Δ
As the motor 33 rotates, the belt 45 rotates and the first gear, gear 41. moves, and the second carriage 41 . also move. At this time, pulley 47
, '47 serves as a movable pulley, the first carriage 41. In contrast, the second carriage 41 moves in the same direction as the bamboo.

In addition, 1. Second carriage 411, 41. The direction of movement is controlled by switching the direction of rotation of the main pulse motor 330.

-h-IP The corresponding copyable range is displayed. That is, paper selection key 3
The paper size specified by 04 is (Px * Py
) and magnification setting key 306.

If the copy magnification specified by 30 is K, the copyable range (x, y) is x=Px/K ywzPy/. Of this copyable range (X # y),
The direction is indicated by a pointer 51.degree. 52 disposed on the back surface of the document table 2, and the y direction is indicated by a scale 53 disposed on the upper surface of the first carriage 41□.

As shown in FIG. 6, the above-mentioned pointers 51.
55 via a spring 56. The pulley 55 is rotated by a motor 58.
The distance between the hands 51 and 52 can be changed by being driven according to the paper size and magnification.

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 30 is pressed, the first
The carriage 411 first moves to the second carriage 41. direction, and then run f4 is turned on and the second carriage 41. is moved in the direction away from.

Once the scanning of the original is completed, the runf. 4 is turned off,
The first carriage 4 is returned to the home position.

As shown in FIG. 7 and FIG.
1, a guide shaft 130 is provided along the lamp 4 in the part where the light of the run f4 is blocked, and this guide shaft 130
A spot light source 131 is movably provided as means for indicating the erasing range of the original. This spot light source 131 is, as shown in FIG.
2 and the lens 133, the light generated by the light emitting element 132 is irradiated onto the document table 2 as a light beam having a diameter d.

This light has a brightness that allows it to pass through the document G set on the document table 2, which is, for example, as thick as a postcard. Further, the spot light source 131 is connected to a timing belt (toothed i-belt) 134 disposed along the guide shaft 130.

The timing belt 134 with the nozzle motor 1350
A hook is provided between a pulley 136 provided on the rotating shaft and a driven pulley 137. Therefore, /4 Luss motor 13
5 is rotated, the cis-spot light source 131 is moved in a direction perpendicular to the scanning direction of the first carriage 41 degrees. In addition, a spot light source 13 is provided on the first carriage 41m located at the end of the guide shaft 130 on the side of the nozzle motor 135.
For example, a position sensor 138 consisting of a microswitch that detects the initial position of the spot light source 1 is provided.
31 is moved, the first P-spot 9 light source 131 comes into contact with a position sensor 138 to detect the initial position.

By the way, the second document scale 2. provided on the right side of the document table 2. is the reference for the document G when specifying trimming, and as shown in FIG. The film sheet 200 is attached to the document table 2 and the document scale 2!, as shown in FIG. 10(a). Alternatively, as shown in FIG. 10(b), the original scale 2. It is adhesively fixed to the upper surface of the document G placed on the document table 2, and one edge of the document G placed on the document table 2 is sandwiched therein to hold it down so that it does not move.

Next, a method for specifying the erasing range of a document using the spot light source 131 will be described with reference to FIGS. 11 and 12. This spot light source 131 can be activated by operating the light emitting element 13 by operating the operation keys 30h to 30d described above.
It is moved with 2 lit. That is, the operation key 30b
.

30d, the motor 33 is driven and the first carriage 41. and spot light source 131 in the scanning direction (11th
(in the arrow y direction shown in the figure). In addition, operation key 3
When 0* and 30e are pressed, the motor 135 is driven and the spot light source 131 is moved in a direction perpendicular to the scanning direction (in the direction of arrow X shown in FIG. 11). The operator presses the operation keys 30-*~SO while visually observing the spot light transmitted through the document G.
a to move the spotlight to a point Si on the document G shown in FIG. 11, for example, and then press the position designation key 30. This sport.

The position of the light beam can be detected, for example, by counting the drive/4' pulse number of the pulse motors 33, 135. After that, if you press the erase range specification key 301, the 12th
As shown in the figure, a rectangular area (indicated by diagonal lines) whose diagonal points are <8ttSt points is designated as the erasing range. Such trimming specification for the original G is performed with the front side as it is, and after specifying, as shown in FIG. to be transferred to

On the other hand, as shown in FIG. 14, an erasing array 150 serving as erasing means is provided close to the photosensitive drum 10, for example, between the charger 11 and the exposure section ph. This erase array 150 is shown in FIG.

As shown in FIG. 16, a plurality of light-shielding cells 151 are arranged in a direction perpendicular to the rotational direction of the photoreceptor drum 10, and inside each of these cells 151 there is a
As shown in (b), a light emitting element 152 made of, for example, a light emitting diode is provided. Furthermore, a lens 153 is provided in the opening of each cell 151 facing the photoreceptor drum 10 to focus the light from the light emitting element 152 onto the surface of the photoreceptor drum 10 .

As mentioned above, the document G is placed face up on the document table.
Specify the erasing range of the original G by aligning it with the second original scale 2° on the upper right side.

Next, after the specification is completed, the document G is turned over to the first document scale 21 side indicating the normal copying reference position on the left side, and then the document cover 1. When the copy key 301 is pressed, the first carriage 41 and the photosensitive drum 1o are operated.

According to the above embodiment, it is possible to specify and erase unnecessary portions of a document, which is convenient for editing a copy image.

Furthermore, since a copying machine that performs trimming by ordinary spotting means and partial erasure play is basically used, the cost of the entire apparatus is reduced.

Furthermore, since the trimming range can be specified using the second document scale on the right side of the document table, it is possible to easily shift to the copying operation on the left side.

Furthermore, since a transparent film sheet is provided on the second document scale so that the document can be easily held down, the document will not move easily.

Note that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the invention.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to provide an image forming apparatus that can specify and erase any part of a document image, and can also confirm the specified erasure range.

[Brief explanation of drawings]

FIG. 1 is an external perspective view showing an embodiment of an image forming apparatus according to the present invention, FIG. 2 is a schematic side sectional view, FIG. 3 is a plan view showing the configuration of an operation panel, and FIG. 4 is a drive unit. Fig. 5 is a perspective view schematically showing the drive mechanism of the optical system, Fig. 6 is a perspective view schematically showing the drive mechanism of the pointer, and Fig. 7 shows the operation of the spot light source. A perspective view, FIG. 8 is a side sectional view of the main part showing the switch light source, FIG. 9 is a partial perspective view of the second original scale part, and FIG. 10 (,) (b) is a second original scale part. 11 and 1
Fig. 2 is a plan view for explaining the operation of specifying the erasing range of the original, Fig. 13 is a plan view for explaining the transition state of the original to the copying position after specifying the erasing range, and Fig. 14 is the arrangement of the erasing array. FIG. 15 is a perspective view showing the relationship between the erasing array and the photosensitive drum, FIG. 16(a) is a side sectional view of the erasing array, and FIG. 16(b) is a partially cut away view of the erasing array. FIG. 1...Copy machine main body, 2...Original table, 2□...1st
Manuscript scale, 2. ...Second manuscript scale, 4.
...Exposure lamp, 10-...Photosensitive drum (image carrier)
, 11... Transfer charger, 23... Fixing roller, 1
31-spot light source, 132... light emitting element, 150...
...Erasing array, 151...Cell, 152...Light emitting element, 200...Transparent sheet member, G..., Original,
P...paper (transferring material). Applicant's agent Patent attorney Takehiko Suzue Engraving of drawings (no changes made) Figure 1 Figure 4 46r Indication of the case Japanese Patent Application No. 143716/1989 2, Name of the invention Image forming device 3, Person making the amendment Relationship to the case Patent applicant (307) Toshiba Corporation 4, Engraving of the drawing originally attached to the representative application・Attachment instructions (no change in content) Procedural amendment 8i!lゎet6.a4, 7.B0□□Secretary Uga Michibe 1, Indication of case 4I Application No. 1986-143'716 2, Invention Name of image forming device 3, person making the amendment Relationship to the case Patent applicant (3073 Toshiba Corporation 4, agent 5, voluntary amendment

Claims (1)

[Claims] (1) A document placed on a document table is optically scanned, a reflected light image from the document is focused on a charged image carrier to form a charge pattern, and this charge pattern is developed. In an image forming apparatus that forms an image by transferring and fixing it to a transfer material, an indicating means is provided in the scanning means and indicates a predetermined range of a document by transmitted light when specifying a range, and a portion corresponding to the specified range. a first control means for displaying a copying reference position on both sides of the document table; The document scale and the second document scale for displaying the specified copy range position are provided facing each other, and a transparent sheet member for holding the document is provided in the document pressing portion of the second document scale. Features of the image forming device.