JPH01197783A - Board writing device - Google Patents

Abstract

PURPOSE:To smooth the erase of a recorded image information and to facilitate the operation of dirt from erasing by providing a fixing means to fix an image, which is formed on a display surface, in such a way that it is able to easily separate. CONSTITUTION:The title device receives recorded information as a raster signal, makes laser light be condensed, and is formed an image on a photosensitive drum 22. Next, an electrostatic latent image formed on the drum 22 is developed by a developing part 24. A sheet member 1 is driven; so that a toner image is transferred to this member 1, and fixed by a fixing part 3. A fixed image formed here is made not to have the failure like scatter, etc., and to be able to be easily erased by an eraser or a cleaning blade 29, etc. Next, an erasing key is depressed, then the member 1 is juxtaposed. The cleaning blade 29 is turned to the position where a tip of it is pressurized to contact with the member 1 at such a time. Toner is welded each other, so that the toner will not be scattered even if the toner is separated from the member 1 by the blade 29.

Description

[Detailed description of the invention] (Industrial application field) The present invention displays image information on a blackboard or whiteboard surface.

Or it relates to a reading board device.

(Prior art) In recent years, a device has been developed that uses a reading device to automatically read what is written with a felt-tip pen on a blackboard or whiteboard at meetings, etc., and prints it out on paper. As a result, the efficiency of meetings has improved, and at exhibition briefings, etc., listeners can now obtain printed sheets of paper, saving them the trouble of copying what is written on the board.

However, it often takes time for speakers to write on a blackboard or whiteboard during the course of a meeting, which may impede the smooth flow of the meeting, and may also cause problems such as writing errors.

Therefore, in order to solve the above-mentioned drawbacks, an electronic blackboard (Japanese Patent Laid-Open No. 62-1022
68 etc.) have been proposed.

(Problems to be Solved by the Invention) However, the electronic blackboard does not have an image fixing means and is erased due to toner scattering during image formation, image display, or image correction, and toner spreading during image erasing. However, there are drawbacks such as the process cannot be performed smoothly and the process of erasing residue becomes complicated.

(Object of the Invention) The present invention has been devised in view of the above circumstances, and is capable of smoothly erasing image information written at the time of image formation, image display, or image modification, and also enables erasure of erased residue. An object of the present invention is to provide a simple board writing device.

(Means for Solving the Problems) According to the present invention, a display surface on a movable sheet or board, a recording means for recording image information on the display surface using an electrophotographic method, and a display surface on the display surface. A board writing device having a reading means for reading the image information of the image, a fixing means for fixing the image formed on the display surface by the recording means in a manner that it can be easily peeled off, and an image fixed to the display surface by the fixing means. and peeling means for peeling off and erasing the image.

Therefore, toner does not scatter when forming an image, displaying an image, or modifying an image, and erasing, erasing, etc. are facilitated.

(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

First, an embodiment of the present invention will be described based on Figs. 1 to W4 and Fig. f38.

FIG. 1 is an overall front view of a board writing device embodying the present invention, FIG. 2 is a block diagram thereof, FIG. 3 is a partial side view of the board writing device, and FIG. 4 is an optical recording section of the board writing device. and FIG. 8 is a flowchart showing the operation of this device.

As is well understood from FIGS. 1 and 3, the sheet member 1 is a wide endless belt, and its surface is marked with a marker 34 or the like and erased with an eraser made of felt or the like.

Furthermore, it has properties that allow toner transfer. The material composition of the sheet member 1 includes, for example, a base of a single layer or multiple layers of resin or synthetic paper such as polyethylene terephthalate, polyethylene, polypropylene, #vinyl acid, or polyvinyl chloride, and polytetrafluoroethylene resin or trifluoroethylene resin. It is preferably laminated or coated with a fluororesin such as ethylene resin, or a resin such as polypropylene or silicone.

The sheet member 1 has a driving roller 33a and a driven roller 33b.
It is hung with appropriate tension on top. - The drive roller 33a is arranged so as to be interlocked with a drive system (not shown), and when the drive system enters the drive state, the drive roller 33a rotates in the direction of arrow A in FIG. 3, and following this, the first On the display side shown in the figure, the sheet member 1 is conveyed endlessly from below to above. At this time, the driven roller 33b is also driven and rotates in the direction of arrow B.

The recording unit 2 provided below the driven roller 33b records image information on the surface of the sheet member 1 using an electrophotographic method. Consisting of two layers, the driven roller 33 is connected via the sheet member 1.
Photosensitive drum 2 rotates in the direction of arrow C in conjunction with the rotation of b.
2, and a static eliminator 1 disposed around the photosensitive drum 22.
9, cleaning blade 20, uniform charging section 21. Optical recording section 23. and a developing section 24, these work together to form an electrostatic latent image on the surface of the photosensitive drum 22 using an electrophotographic method, and cause toner to adhere to the latent image, and when this comes into contact with the sheet member 1, The toner on the photosensitive drum 22 is transferred onto the surface of the sheet member 1, and an image is formed on the sheet member 1 according to the image information.

As shown in FIG. 4, the optical recording section 23 converges a laser beam emitted by a laser 35 in accordance with recorded information with a lens 36, and scans it onto a rotating polygon mirror 38 which is rotationally driven by a drive motor 37. It is configured to form an image on the photosensitive drum 22.

Recorded information is supplied from an external information source such as an input device 10 such as a document reader, an information creation device such as a personal computer or a word processor, or an information transmission device such as a fax.

The developing section 24 is 1, which is used in ordinary copying machines.
A type similar to a component or two-component developer can be used. The developing device consists of a developing cylinder consisting of a fixed magnet and a stainless steel cylinder that rotates on the outside, and an iron blade. The developing toner used in this development is made of a binder such as a vinyl polymer such as polyethylene or polyacrylic acid ester, an epoxy polymer, a petroleum polymer, or an ester condensate, and a colored material such as carbon black. It is formed by mixing, melt-mixing, cooling, crushing, and classifying the particles to have a particle size of 1 to 50μ.

A fixing unit 3 is provided downstream of the recording unit 2 in the sheet conveyance direction, and this unit is made of a rigid cylinder made of stainless steel or the like coated with a rubber having template properties such as silicone rubber or fluorine rubber, and equipped with a halogen heater. It is composed of two fixing rollers: an upper roller 25 with a built-in sheath heater and a lower roller 26 with a built-in sheath heater. Upper roller 25 and lower roller 2
6 and are arranged so as to face each other with the sheet member 1 in between and press against each other. The surface temperature of the rollers 25, 26 can be set between about 100 and 200°C. Here, the surface temperature, nip pressure, nip width, etc. of the fixing rollers 25 and 26 are as follows.
heated toner.

When welding or fixing toner on the sheet member 1 or on the toner already fixed on the sheet member 1, if the adhered state is subjected to an erasing process by an eraser made of felt or the like or a cleaning blade 29, etc., scattering etc. may occur. The value is set to such a value that it can be easily erased. Further, since the sheet member 1 is applied to the recording medium, unlike recording paper such as a single sheet of paper, the toner does not soak into the fibers of the paper, so it is easy to erase after fixing.
5.26 is provided with a static elimination brush 41 in order to prevent toner offset and image blurring from occurring each time the toner is charged.

Additionally, a cleaning section 4 is provided upstream of the recording section 2 in the sheet flow direction.
A cleaning plate 29 made of rubber, plastic, metal, etc., a cleaning brush 28 for removing dirt attached to the cleaning plate 29, and a corona charger 27 for static elimination are provided. The cleaning blade 28 is in the third position when not erasing.
It is located at the position 29a in the figure, and is configured to be movable by a drive device (not shown) so that its leading edge rubs against the sheet member 1 during erasing.

Further, a reading section 5 is provided above the drive roller 33a, and is composed of a light source 30, a gradient index lens array 31, and a same-magnification photoelectric conversion element 32. In other words, the image formed on the surface of the sheet member 1 is exposed to light [30
The radiated light passes through the lens array 31 and reaches the photoelectric conversion element 32, where it is read. The read image is sent to a printer 11 (FIG. 1) for thermal recording, thermal transfer recording, etc., and is printed out.

Said sheet member 1. The recording section 2, fixing section 3, cleaning section 4, reading section 5, etc. are held so as to be framed by a frame 7 supported by a pair of self-supporting columns 9, and the display side of the sheet member 1 is surrounded by the frame 7. Almost the entirety of the display window 6 provided in the display window 6 is exposed to form a display surface. Further, in order to facilitate the above-mentioned writing and erasing, a back plate 44 having an appropriate hardness is provided on the back surface of the sheet member 1 in the display window 6. An operation panel 8, an input device 10 such as a document reader, and a printer 11 are also fixed to the frame 7.

Next, we will explain the operation of this device in 31 steps based on the block diagram in Figure 2.
This will be explained in detail according to the flowchart in FIG.

The functions of this device include a function to record image information from an external device or an internal document reading/input device on the blackboard and enlarge it and display it on the blackboard surface, and a function to read and reduce the information recorded on the blackboard and record it on recording paper. , and a deletion function that automatically deletes the same information.

8-(1) in FIG. 8 shows a blackboard recording routine. After receiving an instruction from the recording switch of the console section (display section) 17 or an external device 14 such as a word processor connected to the outside (step S1), the main It is determined whether or not the fixing section 3, which fixes the image to an erasable degree, which is a feature of the invention, is in a standby state (S2). Detects whether the surface temperature of .26 has reached a predetermined temperature (for example, 150°C), and if it has, the determination result in S2 is YES.
, and if it has not been reached, NO will be returned. If NO, the program proceeds to S3, where the weight indicator on the display section 18 is turned on, and this state continues until the determination result in S2 becomes YES, and when the surface temperature of the rollers 25 and 26 reaches a predetermined temperature, However, the determination result in S2 is YES.
When this happens, the program proceeds to step S4 and receives one line of data from the external device. That is, in this embodiment, the recorded information is received line by line as a raster signal, and in order to form an electrostatic latent image, a laser beam oscillated by a laser 35 is focused by a lens 36, and further rotated by a drive motor 37. The driven multi-surface 138 is scanned to form an image on the photosensitive drum 22.Next, the process advances to step S5, and the electrostatic latent image formed on the photosensitive drum 22 is transferred to the developing section 24.
The sheet member is driven in synchronization with the driving of the photosensitive drum, the toner image is transferred onto the sheet member 1, and the toner image is made to run by the fixing section 3. As mentioned above, the fixed image formed here is free of defects such as scattering and can be easily erased with an eraser or cleaning blade 29. It is detected whether or not is the last line containing image information, and whether or not a predetermined end of the sheet member 1 is in the recording state at the same time (step S6). If the determination result in step S6 is YES, the main line is detected. The routine ends (Step S7); if NO, the program returns to Step S2 until the determination result in S6 becomes YES, that is, all the image information to be written on the board is displayed on the sheet member 1, or the sheet Steps S2 to S5 are repeated until the image information on member 1 covers the entire display window.

Next, a copy routine for reading and reducing information recorded on the blackboard and recording it on recording paper will be explained in detail along the flow shown in 8-(2) in FIG.

First, there is the copy key installed on the operation panel 8.

Alternatively, this routine is started by pressing the number of sheets setting key (step S8), and it is immediately determined in step S9 whether or not there is recording paper for copying, and if No, the paper out indicator is lit ( In step 5IO), the program proceeds to step S15 and ends, and if YES, proceeds to the next step S11, where driving of the sheet member 1 is started.

Next, in step S12, one line of image information is read, and in step S13, this one line of image information is reduced and recorded (copied) on recording paper. The same size optical sensor 32
(Fig. 3) The zero-order step in which a reduced copy is made on thermal paper by reading the printed board information line by line, converting it into an electrical signal, and driving the thermal head according to the signal. In S8, it is determined whether recording has been completed on a preset desired number of recording sheets (
S14), if the determination result is YES, the program proceeds to step S15 and ends; if NO, the program returns to step S9, and continues in step S9 until recording of the desired number of recording sheets is completed. Steps S14 to S14 are repeated.

Next, the blackboard information erasing routine will be explained in detail along the flow shown in 8-(3) of FIG.

First, when an unillustrated erase key (erasure range can be specified) installed on the operation panel 8 is pressed, this routine is started in step S16, and the drive roller 33a rotates.
The sheet member 1 is translated (step 517), and at this time the cleaning blade 29 is rotated to the position shown by the solid line in FIG. Here, since the toner is welded together, the cleaning blade 29
Even if the toner is peeled off from the sheet member 1, the toner does not scatter and the processing is easy.6 Next, step S1
In step 9, it is determined whether the sheet member l has been translated by a distance corresponding to the desired erasing range designated in advance.If the result of determination 1 is YES, the program proceeds to step S.
The process proceeds to step S17 and ends, and if No, the process returns to step S817 until the desired range is completely erased.
Steps S19 to S19 are repeated.

In this embodiment, the above three routines are performed independently, but it is also possible to program them so that they are performed simultaneously. In other words, while reading and copying the information on one display surface, it is also possible to simultaneously erase the forwarding side of the sheet member 1 using the cleaning blade 29, and to sequentially record and display external information in the erased area. Preferably, the area for one display window corresponds to, for example, A4 size.

Next, other embodiments will be explained based on FIGS. 4, 5, and 6.

First, FIG. 4 shows the optical recording section 23 of the first embodiment already explained, and here, the laser 35, light-collecting lens 36, rotating polygon 38, etc. are arranged as shown in FIG. , the LED (light emitting diode) array 40 and the lens array 39 are replaced with the second embodiment of the present invention. That is, the optical recording section 23' of the second embodiment is configured to form an image of light emitted from the LED array 40 in accordance with recorded information on the photosensitive drum 22 via the lens array 39.

Further, in the third embodiment, as shown at 6111, the optical recording section 23'' is composed of a light source 43, a liquid crystal shutter 42, and a lens array 39, whose function is to absorb the light from the light source 43. , the liquid crystal shutter 42 selectively transmits the light according to the image information to be recorded, and the transmitted light forms an image on the photosensitive drum 22 via the lens array 39.

In other embodiments, the fixing section 3 can be replaced with a heat fixing method and a pressure fixing method or a heat pressure fixing method. The advantage of this is reduced power consumption and required preheating time.

Furthermore, by changing the method to forming an image on the photosensitive drum 22 and transferring it onto the sheet member 1, as shown in FIG.
It is also possible to adopt a method in which an image (picture information 1) is directly recorded on the sheet member 1. In this case, the sheet member 1 is
A photoconductor layer is formed on the front surface and a low resistance layer is formed on the back surface 2.
It needs to have a layered structure.

(Effects of the Invention) As described above, the present invention includes a fixing means for fixing an image formed on a display surface in such a way that it can be easily peeled off, so that the following effects can be obtained. Ta.

(1) By performing easily erasable fixing, toner does not scatter during image formation, image display, or image correction while maintaining high erasability.

(2) It is now possible to erase with the same certainty as erasing something written with a marker, without the toner spreading during erasing.

(3) Disposal of erased residue is easy.

(4) Images are less likely to be disturbed due to the toner separating from the sheet member due to the influence of gravity, etc., and long-time display is possible.

(5) Complex diagrams, tables, and many characters that took time to write can now be displayed very easily on the display screen.

(6) It becomes possible to accurately enlarge and display the items written in the manuscript, and the efficiency of the meeting can be improved.

(7) There are few restrictions on where it can be used, so it can be used not only for meetings but also for outdoor exhibitions, etc. (8) When not recording, write on the display surface with a marker, etc. It is also possible to perform operations similar to conventional electronic blackboards, such as reading with a reading means.

[Brief explanation of the drawing]

FIG. 1 is an overall front view of a board writing device according to a first embodiment of the present invention;
FIG. 2 is a block diagram showing the arrangement of the main components of the device, FIG. 3 is a partial side view of the device, and FIG. 4 is a partial sectional view of the optical recording section of the first embodiment of the present invention. FIG. 5 is a partial sectional view of the optical recording section of the second embodiment, FIG. 6 is a partial new view of the optical recording section of the third embodiment, and FIG. FIG. DESCRIPTION OF SYMBOLS 1... Sheet member, 2... Recording part, 3... Fixing part (fixing means), 4... Cleaning part (peeling means),
5... Reading section (reading means), 6... Sheet member display surface. Patent applicant Ryo Yamashita, agent of Kinnon Co., Ltd., patent attorney - B-(1) Figure 8

Claims (4)

[Claims] (1) A movable sheet or board-shaped display surface,
In a board writing device having a recording means for recording image information on the display surface using an electrophotographic method and a reading means for reading the image information on the display surface, the image formed on the display surface by the recording means can be easily read. 1. A board writing device comprising: a fixing means for releasably fixing an image on a display surface; and a peeling means for peeling off and erasing an image fixed to a display surface by the fixing means. (2) The board writing device according to claim 1, wherein the fixing means is of a thermal fixing type. (3) The board writing device according to claim 1, wherein the fixing means is of a pressure fixing type. (4) The board writing device according to claim 1, wherein the fixing means uses a heat-pressure fixing method.