JPH0540529Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a copying device such as an electrophotographic copying machine, and particularly relates to a blackboard (a white resin flat surface with good release properties) on which characters are written and displayed using a felt pen. The present invention relates to a blackboard copying machine that copies characters, figures, etc. written on a writing board (also called a writing board or whiteboard, but referred to herein as a blackboard).

[Prior art]

Conventionally, characters, figures, etc. written on a blackboard at meetings, lectures, etc. were 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, a device has been proposed in which characters are written on a writable and erasable flat panel with a felt-tip pen, etc., and the writing is held between a pair of rollers and moved up and down to copy the characters printed on the panel surface. . There is also a device that irradiates light onto characters, figures, etc. on a panel, reads the reflected light with an image sensor such as a CCD (charge coupled device), performs photoelectric conversion, and copies the electrical signal onto transfer paper using a printer, etc. .

[Problems with conventional technology]

However, with the blackboard copying machine having the above configuration, only the image on the panel can be copied, and normal original copying is not possible. Furthermore, since the panel moves in and out of the copying machine, a large panel cannot be used, and the area on which writing can be made as a blackboard is small, making it impractical as a blackboard. Furthermore, it has not been possible to downsize the copying apparatus as a whole. Furthermore, when a reading device is used, it is necessary to use an image sensor, a printer, etc., which increases the size of the device itself and increases costs.

[Purpose of invention]

In view of the above-mentioned drawbacks of the conventional technology, the object of the present invention is to provide a copying device that has a normal copying function and is capable of copying images such as characters and figures drawn on a panel with a simple configuration. That is.

[Key points of the idea]

In order to achieve the above object, the present invention includes a board section having a writable and erasable board sheet, a light source for exposing an image written on the board sheet by a writing instrument, a board optical system, and a manuscript table. an exposure port for introducing the light image guided by the board optical system into the interior; and a copying means for selectively copying the image on the board sheet and the image of the document placed on the document table. and a copying section that is movable between a first position for copying an image on the board sheet and a second position for copying an image on the document, wherein the exposure The apparatus is characterized in that the mouth is provided with a shutter that opens when the copying section is in the first position and closes when the copying part is in the second position to prevent entry of external light.

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

FIG. 2 is a perspective view showing the overall structure of the blackboard-copying machine of the present invention, and FIG. 3 is a perspective view showing the blackboard copying state of the blackboard-copying machine of the present invention.

In the drawing, the blackboard copying machine is composed of a board part 1 and a copying part 2. The board part 1 is composed of a frame 1a, a board sheet 3, and a board operation part 4, and inside there is a board optical system and a winding board. It has a removing device. The copying section 2 has a document cover 2a on the top.
is provided, and a rail 5 provided on the copying machine table 5
It is attached so that it can be moved back and forth on a.

Normally, when copying a document by placing it under the document cover 2a, move the copying section 2 forward as shown in FIG.
When copying an image on the board sheet 3, the copying section 2 is used by retracting it to the rear as shown in FIG. FIG. 1 is a diagram showing the internal configuration of the copying section 2. As shown in FIG. When copying an original (not shown) placed on a normal original glass 6, the original is irradiated with light from a light source 7,
The light reflected from the original is exposed to the photosensitive surface 12 of the photosensitive drum 11 via the first mirror 8 for copying, the lens 9a for copying, and the second mirror 10 for copying. At this time, the photosensitive surface 12 has been given a uniform charge in advance by the charger 13, the non-image area is neutralized by the blank lamp 14, and an electrostatic latent image is formed on the photosensitive surface 12 by the above-mentioned exposure. Ru. The electrostatic latent image formed on the photosensitive surface 12 is visualized by the developing device 16 and becomes a toner image, and in the transfer device 17, the leading edge of the toner image is transferred from the paper feed cassette 18 to the paper feed roller at the same timing according to the method described later. 19 The image is transferred onto the transfer paper sent via the timing roll 20. After the transferred toner image on the transfer paper is thermally fixed by the fixing device 21, the transfer paper is transferred to the paper discharge roll 2.
2, it is ejected from the machine. On the other hand, residual toner on the photosensitive surface 12 that has not been completely transferred by the transfer device 17 is removed by a cleaner 23, and a uniform charge is applied to the photosensitive surface 12 by a charger 13 in preparation for re-exposure.

On the other hand, the housing 2b of the copying section 2 is located below the original glass 6.
has an exposure aperture for board copying (hereinafter referred to as exposure aperture).
24 and an exposure aperture 25 for copying an original are provided, and a shutter 26 is provided below the exposure aperture 24 to prevent outside light from entering the machine when copying an original. In addition, a leading edge indicator 2 is provided at the front of the original glass 6.
7 is provided.

Next, the timing control operation for aligning the leading edge of the transfer paper and the leading edge of the toner image will be briefly explained with reference to FIGS. 1, 4, and 5a and 5b.
(This is a view drawn from the rear side.) A standby sensor 28 for detecting the leading edge of the transfer paper is provided immediately before the timing roll 20 on the conveyance path of the transfer paper, and micro switches 29 and 30 are provided in parallel on the casing 2b of the copying section 2. ing. Each of the micro switches 29 and 30 has an actuator 29.
a, 30a, and a push piece 3 is provided at the bottom of the document glass 6 at a position corresponding to the micro switch 29.
1 and 32 are provided, and a push piece 33 is provided at a position corresponding to the micro switch 30. Therefore, the push pieces 31 and 32 actuator 29a.
The push piece 33 is in the position where the actuator 30a is pressed.
It is located at the position where you press the button. At the start of copying, the actuator 30a is stopped with the push piece 33 pushing down the actuator 30a, as shown in FIG. 5a.
When the copy switch is turned on, the transfer paper is sent to the conveyance path by the paper feed roller 19, the leading edge of the transfer paper is conveyed by the standby sensor 28, and after a certain period of time, the leading edge of the transfer paper is in contact with the timing roll 20, and the transfer is performed. The paper stops.

On the other hand, at the same time as the standby sensor 28 detects the leading edge of the transfer paper, the light source 7 turns on, and at the same time the document glass 6
starts forward scanning in the direction of arrow 34a. While the document glass 6 is moving forward, the push piece 31 is pressed against the actuator 2.
When 9a is pressed down, the timing roll 20 starts rotating at the same time or after a predetermined time period determined by the copying signal, and the transfer paper is sent to the transfer device 17 in synchronization with the toner image on the photosensitive surface 12.

Further, after the transfer is performed, the original glass 6 moves forward until the rear end of the transfer paper passes the standby sensor 28. When the rear end of the transfer paper passes the standby sensor 28, forward scanning is stopped and the original glass 6 moves backward in the direction of the arrow 34b. Perform scanning.

Furthermore, when reducing copying using the maximum size paper as the transfer paper, the push piece 32 pushes down the actuator 29a before the trailing edge of the transfer paper passes the standby sensor 28; The original glass 6 stops until it passes through, and then retreats.

Next, the configuration of the board section 1 will be explained using FIG. 6. The winding device is composed of winding rolls 35, 36, feed rolls 37a to 37b, etc., and winding of the board sheet 3 is performed by passing the board sheet 3 wound many times around the winding roll 36 through the feed rolls 37a to 37b. The film is wound onto a winding roll 35 at a constant winding speed by a drive mechanism (not shown), and unwinding is performed by winding onto a winding roll 36. Further, the wound board sheet 3 forms a horizontal surface with respect to the frame 1a by the feed rolls 37c to 37d. Further, the board sheet 3 is kept horizontal by a backup board 38.

In addition, the blackboard optical system includes a fluorescent lamp 39 and a first mirror 4.
0, a second mirror 41, a blackboard lens 42, and the like, a fluorescent lamp 39 irradiates the board sheet 3 formed in a planar shape between the above-mentioned feed rolls 37a and 37b.

In addition, as shown in FIG. 7, the board sheet 3 has
A first page detection mark 43 is provided at one location on the upper end, and page detection marks 44a, 44b are provided at a certain interval m at the lower end, and timing marks 45a, 45b, . . . are provided at a certain interval m. Page detection marks are provided up to 44c (not shown), so that five pages are divided on the board sheet 3. Also,
Mark sensors 46 and 47 are provided in the board section 1 at positions corresponding to the first page detection mark 43, page detection marks 44a, 44b to 44c, and timing marks 45a and 45b to 45e, respectively.

On the other hand, the board operation section 4 includes a power switch 48 and page instruction switches 49a to 49 as shown in FIG.
9e, a print switch 50, a power switch 48, a power lamp 51 that lights up when the power switch 48 is turned on, and each page instruction switch 49a to
It is comprised of page display lamps 52a to 52e and an alarm lamp 53 that light up corresponding to the selected page when 49e is turned on. The alarm lamp 53 lights up when the copying section 2 detects, by a detection means (not shown), that the image on the board sheet 3 is not in the position to be copied, and when there is no transfer paper or when the fixing device 21 has reached a predetermined temperature. Blinks when the copying conditions are not met, such as when there is no copy available.

Further, if the mark sensor 46 does not detect the first page detection mark 43 when the power switch 48 is turned on, the take-up roll 36 is driven by a control mechanism (not shown), and the mark sensor 46 detects the first page detection mark 43. Move the board sheet 3 to the position where it is detected.

In the blackboard copying machine configured as described above, the process of copying images such as characters and figures drawn on the board sheet 3, which is the essential part of the present invention, will be described below.

FIG. 9 shows the optical path of reflected light 54 from the adjacent board sheet 3 when the light from the fluorescent lamp 39 is irradiated onto the board sheet 3 on which characters, figures, etc. are drawn. As shown in the figure, the reflected light 54 is reflected by the first mirror 40 arranged at an angle of 45 degrees with respect to the reflected light 54.
It is bent backward by 90 degrees, further bent downward by 90 degrees by a second mirror 41, and exposed onto the photosensitive drum 11 in the copying section 2 through the blackboard lens 41. Further, the shutter 26, the original glass 6, the copying lens 9a, etc. located on the optical path of the reflected light 54 are detected to be in a position where the copying section 2 copies the image on the board sheet 3 by a detection means (not shown). For example, the shutter 26 shown in FIG. 1 moves to the position indicated by the dotted line.
The original glass 6 and the original cover 2a have also been moved to a position where they do not block the exposure aperture 24, and furthermore, the copying lens 9a has also been moved to the same-magnification position 9b as indicated by the dotted line, where it does not block the optical path of the reflected light 54. Even in optical systems such as mirrors, when they are in a position that blocks the optical path of the reflected light 54, they are moved to a position that does not block the optical path of the reflected light 54, and the reflected light 54 that has passed through the blackboard lens 42 passes through the exposure opening provided in the housing 2b. The photosensitive surface 12 can be irradiated with light through the photosensitive surface 24 . Incidentally, the movement of each optical means may be performed at the same time as the print switch 50 is turned on, and the actual copying may be performed after the movement of each optical means is completed. After the photosensitive surface 12 is exposed to light, the image drawn on the board 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. At this time, the timing between the image and the transfer paper is adjusted using the first page detection mark 4 mentioned above.
3. Page detection marks 44a to 44e, timing marks 45 to 45e, and mark sensors 46, 4
7.

For example, if the copying section 2 is already in the position for copying the image on the board sheet 3 and you want to copy the third page image drawn on the board sheet 3, turn on the page instruction switch 49c and copy the image on the third page. A page display lamp 52c indicating copying is turned on, and a control mechanism (not shown) drives the winding roll 35 to count page detection marks.
When the third page, that is, the page detection mark 44c is detected, the winding roll 35 is stopped. After turning on the page display lamp 52c, the print switch 50 is turned on.
is turned on (at the same time as the page detection mark 44c is detected if the take-up roll 35 is being driven, or at the same time as the print switch 50 is turned on if the take-up roll has already stopped), the paper feed roller 19 is turned on. Rotation is started and the transfer paper is sent out from the paper feed cassette 18 to the conveyance path. After the transfer paper sent to the conveyance path passes the standby sensor 28, the paper feed roller 19 continues to rotate for a predetermined period of time, and the timing roll 20
Bring the leading edge of the transfer paper into contact with and stop. Further, at the same time when the standby sensor 28 detects the leading edge of the transfer paper, a winding signal is sent to the board section 1 by a control circuit (not shown).
and drives the take-up roll 35. As a result, the board sheet 3 moves, and the timing mark 45c on the board sheet 3 moves to the mark sensor 4.
7, a timing signal is sent from the board section 1 to the copying section 2, causing the timing roll 20 to start rotating and causing the transfer device 17 to convey the transfer paper.
Through this operation, the leading edge of the toner image on the photosensitive surface 12 and the leading edge of the transfer paper are aligned, and the toner image can be transferred to the correct position on the transfer paper.

Furthermore, when the mark sensor 47 detects the next page detection mark 44d, the drive of the winding roll 35 is stopped.

Further, when copying other pages such as the first page, second page, fourth page, etc. of the board sheet 3, the same operation can be performed.

As described above, according to this embodiment, the board sheet 3
It becomes possible to copy the image drawn on the top using a normal copying machine, and at this time, the case 2b of the copying machine
An exposure aperture 24 is provided in a part of the blackboard, and blackboard copying can be performed simply by moving the copying lens 9a and the like.

Furthermore, although this embodiment has been described with respect to a copying apparatus in which the original glass 6 moves to expose the original, the same implementation can be performed using a copying apparatus in which the optical system moves to expose the original. can.

[Effect of idea]

As explained in detail above, according to the present invention, when copying an image drawn on a blackboard, there is no need to put the panel itself into a copying device or to have the image read by a reading device, and the configuration is simple. Therefore, it is possible to provide a copying apparatus which can be made smaller and which does not increase the cost of the apparatus. Additionally, normal original copying can be performed simultaneously with images drawn on the panel using the same device.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of the copying section of the present invention, Fig. 2 is a perspective view of the copying apparatus of the present invention, Fig. 3 is a perspective view of the copying apparatus showing a blackboard copying state, and Fig. 4 is a micro switch and push piece. Fig. 5a and b are arrangement diagrams of micro switches and push pieces, Fig. 6 is a diagram of the board section, Fig. 7 is a diagram of the board sheet, and Fig. 8 is a diagram of the operation section. , FIG. 9 is a configuration diagram showing the optical path light emission of reflected light. DESCRIPTION OF SYMBOLS 1... Board part, 2... Copying part, 3... Board sheet, 6... Original table glass, 11... Photosensitive drum, 24... Exposure opening, 26... Shutter, 28
...Standby sensor, 40...First mirror, 41...
Second mirror, blackboard lens, 43...First page detection mark, 44a, 44b...Page detection mark, 45a, 45b...Timing mark, 54
……reflected light.

Claims (1)

[Claims for Utility Model Registration] A board section having a writable and erasable board sheet, a light source that exposes an image written on the board sheet by a writing instrument, and a board optical system; a document table; It has an exposure opening for introducing the light image guided by the board optical system into the inside, and a copying means for selectively copying the image on the board sheet and the image of the document placed on the document table. , a copying apparatus comprising a copying section that is movable between a first position for copying an image on the board sheet and a second position for copying an image on the original document, wherein the exposure aperture includes: A copying apparatus further comprising a shutter that opens when the copying section is in the first position and closes when the copying section is in the second position to prevent entry of external light.