JPH055573Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a blackboard copying device using electrophotographic copying technology, and in particular is capable of selectively copying desired areas of images such as characters and figures written on a blackboard. The present invention relates to a blackboard copying device.

[Prior Art and its Problems] Conventionally, characters, figures, etc. written on a blackboard at meetings, lectures, etc. have been transcribed into notebooks. However, in order to prevent trouble and errors during transcription, a copying device that can directly copy characters written on a blackboard has been proposed.

For example, write characters etc. on a blackboard on a flat board that can be written on and erased with a felt pen, etc., and then
The blackboard itself is held between a pair of rollers and moved up and down to perform optical scanning, forming an electrostatic latent image on the photoreceptor, which is then developed and transferred to copy the characters written on the panel surface. Shine light onto the device, a blackboard with letters, figures, etc. written on it, and use the reflected light to
A device has been proposed that performs reading with an image sensor such as a CCD (charge-coupled device), performs photoelectric conversion, and copies the image onto paper using a printer or the like based on the electrical signal.

Further, although the apparatus having the above configuration can only copy images on a panel, a copying apparatus that can perform both recording on a panel and normal copying has also been proposed.

However, in these devices, when copying an image written on the display member, the display member is usually managed on a screen-by-screen basis, so all images on the screen are not copied when in copy mode. It ends up.
Therefore, writing parts that do not need to be copied or duplicate written parts are also copied, resulting in a lot of waste. In addition, if the copied and distributed materials had insufficient margins, it would be difficult to add notes, which was not desirable in terms of document management.

Therefore, in order to selectively copy only the designated area on the display member, a number of separately provided erasing lamps are turned on during the exposure operation of the image on the display member, and the photoreceptor surface is simultaneously exposed. Although it has been considered to copy only the necessary portions, this requires a plurality of devices, resulting in an increase in size and, therefore, an increase in costs.

[Purpose of the invention] In view of the above-mentioned drawbacks of the conventional technology, the present invention makes it possible to copy only the necessary portion of an image written on a display member and to obtain blank areas for data management using simple operations and at low cost. The purpose of the present invention is to provide a blackboard copying device that can perform the following functions.

[Main points of the invention] In order to achieve the above object, the present invention includes a light source that illuminates the document placement surface of the document table, and an optical system that forms an image of reflected light from the document placement surface on a photoreceptor. and an image forming means for forming an image on the writable and erasable display member onto the photoreceptor, and has an image copying function on the document placement surface and an image copying function on the display member. A blackboard copying apparatus having: an image area identification mark provided on the display member, a detection member for detecting the mark, and selectively copying only a designated area on the display member when copying an image on the display member. and area specifying means for enabling the detection, and the light source is characterized in that lighting is controlled based on the output of the area specifying means and the detection member.

[Embodiments of the invention] Examples of the invention will be described in detail below with reference to the drawings.

FIG. 1 is a configuration diagram showing the copying section of the blackboard copying device of the present invention, FIG. 2 is a perspective view showing the overall configuration of the blackboard copying device of the present invention, and FIG. 3 is an operation as an embodiment of the present invention. FIG.

In FIG. 2, the blackboard copying apparatus is composed of a display section 1 and a copying section 2, and the display section 1 is composed of a frame 1a, a display sheet 3, an operation section 4, etc.
The interior includes a display optical system and a winding device for the display sheet 3. The copying section 2 is mounted on a rail 5a provided on a copying machine stand 5 so as to be movable back and forth.

When copying an original by placing it under the original cover, move the copying section 2 forward as shown by the broken line (in the direction of arrow A), and when copying the image on the display sheet 3,
The copying section 2 is retracted and used as shown by the solid line.

Furthermore, an operation section 4 is provided on the front surface of the frame 1a of the display section 1. As shown in FIG. 3, the operating section 4 consists of switches 4a to 4c, etc., and as will be explained in detail later, 4a copies the entire screen of the display section 1, 4b copies the right half, and 4c copies the left half. This is an area specification switch that can be operated as follows.

FIG. 1 is a diagram showing the internal configuration of the copying section 2. As shown in FIG. The document table is composed of a document cover 2a, a document glass 2b, etc., and is normally located at a position indicated by a broken line X. When copying an original (not shown) placed on the original glass 2b, the original table moves in the direction shown by arrow B, and the original is irradiated with light from the light source 2c, and the reflected light from the original is removed. to the photosensitive drum 9 via the first mirror 6 for copying, the lens 7 for copying, and the second mirror 8 for copying.
The photosensitive surface 10 of is irradiated (exposed) with light. At this time, a uniform charge is applied to the photosensitive surface 10 in advance by the charger 11, and an electrostatic positive latent image is formed on the photosensitive surface 10 by the above-described exposure. The electrostatic latent image formed on the photosensitive surface 10 is visualized by the developing device 12 and becomes a toner image, and the transfer device 13 transfers the image from the paper feed cassette 14 to the paper feed roller 15, in time with the leading edge of the toner image. The image is transferred onto the transfer paper sent via the timing roller 16. After the transferred toner image on the transfer paper is thermally fixed by a fixing device 17, the transfer paper is discharged onto a paper discharge tray 19 by a paper discharge roller 18. On the other hand, residual toner on the photosensitive surface 10 that has not been completely transferred by the transfer device 13 is removed by a cleaner 20.
The photosensitive surface 10 is then uniformly charged by a charger 11 in preparation for re-exposure.

On the other hand, the housing 2 of the copying section 2 is located below the original glass 2b.
d is an exposure aperture for display copying (hereinafter referred to as exposure aperture)
21 and an exposure opening 22 for copying an original are provided.

Next, the configuration of the display section 1 will be explained using FIG. 4. The winding device is composed of a winding roller 23, a rewinding roller 24, and feed rollers 25a to 25d.
4, the display sheet 3 wound many times is sent to the roller 2.
5a to 25d, the film is wound onto the winding roller 23 (at this time, the winding speed is maintained at a constant speed by a drive mechanism not shown), and rewinding is performed by winding the film onto the rewinding roller 24. Further, the rolled up display sheet 3 is transported by feeding rollers 25c to 25d.
This forms a plane parallel to the frame 1a. In addition, the display sheet 3 is the backup board 2.
The plane is maintained by 6. In this case, display sheet 3 has a display screen for 5 pages,
To stop each page, display sheet 3 (not shown)
When a sensor (not shown) detects the page detection mark marked on the page, the drive is controlled by a control section (not shown).

In addition, the display optical system includes a fluorescent lamp 27 and a first mirror 2.
8, a second mirror 29, a blackboard lens 30, etc., and a fluorescent lamp 27 irradiates the display sheet 3 formed on a plane between the above-mentioned feed rollers 25a and 25b.

FIG. 5 shows the optical path of the reflected light from the display sheet 3.

As shown in the figure, the reflected light 31 is reflected by the first mirror 28 arranged at an angle of 45 degrees with respect to the reflected light 31.
It is bent 90 degrees, and further bent 90 degrees downward by the second mirror 29 to expose the photosensitive drum 9 in the copying section 2 through the blackboard lens 30. Further, the original glass 2b located on the optical path of the reflected light 31 has been moved to a position where the copy 2 copies an image on the display sheet 3 by a detection means (not shown) (see FIG. 1), and the blackboard lens 30 is The reflected light 31 that has passed is
Light can be irradiated onto the photosensitive surface 10 through an exposure opening 21 provided in the housing 2d.

It is also possible to move the document glass 2b at the same time as a copy switch (not shown) is pressed, and to perform the actual copying operation after the movement is completed.

After the photosensitive surface 10 is exposed to light, the image drawn on the display sheet 3 is copied onto the transfer paper through the same steps as the above-described copying of the original, such as development, transfer, and cleaning.

FIG. 6 is a diagram showing the main part of the display sheet 3. As shown in FIG. In the figure, each page P of display sheet 3
1, P2... have copy area detection marks 3a, 3
a', 3b, 3b', 3c, .

Next, the display section copying operation for copying the image written on the display section 1 onto transfer paper will be explained using the flowchart of FIG.

For example, the first page (P1) of display sheet 1
The case where is displayed on the display section 1 will be explained as an example.

First, turn on the power switch (step 1),
It is determined whether the switches 4a to 4c are turned on (steps 1 to 3). Normal display sheet 3
When copying the front side of the screen, the switch 4a is pressed, the display sheet 3 begins to move as described above, and when the copy area detection mark 3a is detected (step 24),
Exposure is performed by the display optical system (step 25),
Furthermore, when the trailing edge of the page is detected by a sensor (not shown) (step 26), the exposure of the display optical system ends (step 15). After the above-described copying process, the image transfer paper 3 as shown in FIG.
3a is obtained.

On the other hand, if the switch 4b is turned ON (step 3), that is, if you wish to copy only the right half of the display screen, the process similarly proceeds to steps 17 and 18, but here the light source in the copying section 2 described above is turned on. 2c is always on (step 18), and as mentioned above, the reflected light from the surface of the original mat 2a (the original is not placed on the original table) passes through the first copying mirror 6, the copying lens 7, and the second copying mirror 8. The photosensitive surface 10 is irradiated (exposed) by an original (not placed on the mat, the surface of which is white). Thereafter, when the copy area detection mark 3a' on the display sheet 3 is detected in step 19, the timer 1 is set (step 20), and the photosensitive surface is moved by the distance l shown in FIG.
When the time for 0 to move has elapsed (step 21), the light source 2c is turned off (step 22).

Then, as shown in FIG. 7b, a transfer paper 33b is obtained in which the left side of the display screen is not copied (L is a non-image forming area). Also, turn on switch 4c in the same way.
In this case, the process proceeds to step 5 and step 6. In this case, after the copy area detection mark 3a' is detected (step 7), the timer is set and the light source 2c is turned on, resulting in the process shown in FIG. A transfer paper 33c as shown in c is obtained in which the right screen corresponding portion is not copied (non-image forming portion R).

As described above, by turning on the light source 2c simultaneously during the exposure operation from the display optical system, it is possible to easily erase portions of the screen that do not need to be copied, which is extremely convenient in practice.

In the above embodiment, the difference in the distance l on the photosensitive surface 10 was controlled by the timer 1, but the position of the copy area detection mark 3a' on the display sticker 3 was arranged in consideration of the distance l. You can. Further, by variously changing the position of the copy area detection mark and the light source, multi-division copying such as 1/4 screen copying, 3/4 screen copying, etc., is also possible.

[Effects of the invention] As explained in detail above, according to the invention, it is possible to copy only the necessary parts of the image written on the display sheet with a simple configuration and at low cost, and to copy only the necessary parts of the image written on the display sheet. It is possible to provide a blackboard copying device that can effectively utilize the blackboard, prevent unnecessary parts from being copied, and is extremely useful in terms of airtightness and material management.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the copying section of the blackboard copying device of the present invention, FIG. 2 is a perspective view showing the overall structure of the blackboard copying device of the present invention, and FIG. 3 is a diagram showing an embodiment of the blackboard copying device of the present invention. FIG. 4 is an enlarged view showing the operation section, FIG. 4 is a configuration diagram of the display section, FIG. 5 is a schematic configuration diagram of the display section optical system,
FIG. 6 is a block diagram explaining the copying area on the display member, FIG. 7 is a block diagram explaining the copying state of copy paper, and FIG. 8 is a flowchart diagram explaining the copying operation of the display unit. be. 1...Display section, 2...Copying section, 2c...Light source,
3...display sheet, 3a, 3a', 3b, 3b'...
Copy area detection mark, 4... Operation unit, 6... First mirror for copying, 7... Lens for copying, 8... Second mirror for copying, 9... Photosensitive drum, 10...
Photosensitive surface, 11... Charger, 21... Exposure port for display copying, 22... Exposure port for document copying, 23... Winding roller, 24... Rewinding roller, 27...
...Fluorescent lamp, 28...First mirror, 29...Second mirror, 30...Blackboard lens, 31...Reflected light,
32...Mark sensor, 33a, 33b, 33
c...Transfer paper.

Claims (1)

[Scope of utility model registration request] a copying section equipped with a light source that illuminates the document placement surface of the document table, an optical system that forms an image of light reflected from the document placement surface on a photoreceptor, and an image on a writable and erasable display member. an image forming means for forming an image on the photoreceptor, and has both an image copying function on a document placement surface and an image copying function on a display member, an image area provided on the display member; The light source includes an identification mark, a detection member that detects the mark, and an area designation unit that selectively enables copying of only a designated area on the display member when copying an image on the display member, and the light source detects the area designation. A blackboard copying device characterized in that lighting is controlled based on the output of the means and the detection member.