JPH0668662B2 - Image forming device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an image forming apparatus, and more particularly to an image forming apparatus capable of copying a still image projected on a board sheet.

[Prior art]

In a conventional image forming apparatus, a so-called blackboard copying machine has been proposed in which characters, figures, and the like written on a board sheet can be directly copied to obtain a hard copy in order to improve the efficiency of meetings and the like.

In this method, for example, a board sheet filled in with a felt pen or the like is moved and exposed, and the reflected light is guided to a copying machine using an electrophotographic technique to copy the board surface.

In addition, a writable and erasable board surface is provided for multiple pages, and one of the multiple pages has an overhead projector (OHP).
There were also those equipped with screen pages for projecting images such as projectors and projectors.

[Problems of conventional technology]

In the image forming apparatus having the above-mentioned configuration, the characters and figures written on the board sheet can be copied, but there is a drawback that the image projected on the screen cannot be copied.

[Object of the Invention]

The present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to provide an image forming apparatus capable of copying a projected image (still image) on a sheet member.

[Main points of the invention]

According to the present invention, according to the above-mentioned object, a semi-transparent display surface on which writing and erasing by a writing instrument and a light image can be projected from the outside, and a back surface opposite to the projection surface of the semi-transparent display surface are fixed on the semi-transparent display surface. An image forming apparatus comprising an optical system for performing slit scanning in the above state and a copying unit for copying an optical image formed by the optical system, and copying a still image projected from the outside by slit exposure. Is achieved by providing.

Example of Invention

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

FIG. 1 is a sectional view showing an example of an image forming apparatus of the present invention.

The image forming apparatus includes a frame 1 that shields external light, a sheet member 2 disposed inside the frame 1, and the sheet member 2
A moving mechanism 3 for winding a sheet by a roller group and the sheet member 2
Backup board 4 made of a transparent member for preventing the display surface from being bent, an optical system 5 provided on the back surface of the sheet member 2, and a copying apparatus 6 for copying an image formed by the optical system 5. It consists of

The sheet member 2 includes a plurality of pages (the area exposed by stopping at the display portion of the frame is one page) formed of a flexible white material that can be written with a felt pen and an overhead projector (hereinafter referred to as OHP). ) And a screen page 2a capable of projecting an image of a projector or the like.

The screen page 2a is exposed over the entire display portion, has an area for one page, and is made of a translucent member.

Here, the semitransparent member is a frosted glass-like opaque semitransparent material on which a projected image of an OHP, a slide, or the like is formed, and the image can be viewed from the front and back surfaces. Say something.

The screen page 2a is made of a material which can be written and erased by a felt pen or the like like other sheet members.

The moving mechanism 3 is composed of a plurality of roller groups arranged above and below the display unit. A rewinding roller 8 and an auxiliary roller 9a are provided at the lower portion of the display unit, and the rewinding roller 8 has:
A part of the sheet member 2 is wound.

On the other hand, a winding roller 10 and auxiliary rollers 9b, 9c, 9d are provided on the upper part of the screen page 2a, and the winding roller 10 winds the sheet member 2 at a constant speed by a driving mechanism (not shown).

Further, the wound sheet member 2 forms a surface vertical to the backup board 4 by the auxiliary rollers 9c and 9d, and the vertical surface is illuminated by the light source 11.

Further, at the right end and the left end of the sheet member 2, page detection marks and timing marks (not shown) are provided for each page, and the mark sensors 12, 1 provided near the moving mechanism 3 are provided.
At 3, the page detection mark and the timing mark are detected, and a desired page is displayed on the display unit by an operation signal from the operation unit 14.

The optical system 5 is composed of a light source 11 for irradiating an image on the sheet member 2 at a reading position, mirrors 15, 16, 17, 18 and a lens 19, and is formed between the auxiliary rollers 9c and 9d. Read the image on the position.

Here, the mirror 15 is fixed to the apparatus main body by a support structure (not shown), the mirror 16 is fixed to the moving table A20, and the mirrors 17 and 18 are fixed to the moving table B21.

Further, the moving table A20 and the moving table B21 are provided so as to be movable in the vertical direction in parallel with the backup board 4 by a moving mechanism (not shown), as indicated by the alternate long and short dash line in FIG.

Further, the movable table A20 is provided with slits 20a over substantially the entire width of the display portion, and one ends of the light shielding curtains 34a, 34b are fixed to the upper and lower ends of the slits 20a.

The other ends of the light-shielding curtains 34a, 34b are fixed to the light-shielding curtain winding rolls 35, 36, respectively, and are constantly biased and wound by a torsion spring or the like in the directions of the arrows. When the movable table A20 moves, one of the light-shielding curtains 34a and 34b is fed out from each of the light-shielding curtain take-up rolls 35 and 36 and the other is wound up according to the movement.

Further, the surface of the light-shielding curtains 34a, 34b on the side of the backup board 4 is white and the side of the optical system is black, and it is easy to see even if black characters and figures are written on the translucent screen page 2a with a felt pen or the like.

The copying machine 6 includes a photoconductor 22 and photoconductors arranged around the photoconductor 22.
22 Charger 23 that uniformly charges the surface, developing device 24, transfer paper 25, paper feed roller 26 that conveys transfer paper 25 one by one, standby to convey transfer paper 25 in synchronization with the image on photoreceptor 22 surface Roll 27,
Transfer device 28, cleaning device 29 for cleaning the residual toner on photoconductor 22, fixing device 30 for fixing the image on transfer paper 25, paper ejection roll 31 for ejecting transfer paper 25 outside the device, transfer paper ejected It is composed of a discharge tray 32 for receiving 25.

The image formed on the photoconductor 22 by the optical system 5 is copied onto the transfer paper 25 by a known electrophotographic technique.

Next, the operation of the image forming apparatus configured as above will be described.

Now, a case will be described in which an image projected by the projection light 33 on the screen page 2a is copied by an OHP device or the like.

The image projected by OHP etc. on the screen page 2a and the characters, figures etc. written by the felt pen etc.
Since it is frosted glass and semi-transparent, it can be read as an optical image even on the back side of the projection surface.

When the screen copy button of the operation unit 14 is pressed, the movable base A20 and the movable base B21 are moved from the position indicated by the one-dot chain line in FIG. 2 to the position indicated by the lower solid line, and then moved to the scanning start position. Next, the slit 20a formed on the moving table A20 is a mirror.
The display unit is moved and scanned from the bottom to the top at a constant speed together with 16 fixed moving bases A20. At this time, screen page 2a remains stopped on the display.

The moving table B21 that supports the mirrors 17 and 18 also moves upward in response to the movement of the moving table A20, but this moving speed is the moving table A2.
It is half the speed of zero.

With this optical system moving mechanism, the optical distance from the rear surface of the screen page 2a to the photoconductor 22 via the mirrors 16, 17, and 18 is kept constant, and the object-image distance can be kept unchanged.

The projected image scanned by the movement of the mirror 16 is
An image is formed on a photoconductor 22 by a lens 19 via 7, 18 and is copied on a transfer paper 25 by a copying apparatus 6 using a known electrophotographic technique. Therefore, according to the image forming apparatus of the present invention, the image displayed on the screen and the written characters and figures can be combined and copied.

Even when the semi-transparent screen page 2a is exposed to the display unit, since the light-shielding curtains 34a and 34b are arranged on the back surface side, the external light or the projection light such as OHP is the optical system portion of the mirror 17 , 1
It does not adversely affect the image formation because it does not reach the lens 8, etc.

In addition, the light for copying the screen page 2a is entirely slit 20.
It is imaged only with light that has passed through a.

The scanning speed of the optical system 5 and the moving speed of the photoconductor 22 are
Everything is in sync.

On the other hand, in the movement path of the movable table A20, the position detection switch (not shown) is in a fixed position (the position shown by the solid line in FIG. 1), the image forming start position in the screen page copy mode, and the movable table A20 scans the screen page. A plurality of image forming end points are arranged in correspondence with each other.

Further, the timing signal in the screen page copy mode (transfer sheet refeeding synchronization signal) is issued after a lapse of a predetermined time from the operation of the switch provided at the image forming start position.

Next, when the image written on the sheet member 2 is copied, it is performed by pressing the board copy button and the designated page button of the operation unit 14.

The page movement of the sheet member 2 is controlled by mark sensors 12 and 13 provided at positions corresponding to the page detection mark and timing mark (not shown) provided at the right and left ends of the sheet member 2.

In the case of board copy, the movable table A20 and the movable table B21 remain stationary and scan the sheet member 2 at the reading position by winding the sheet member 2 at a constant speed (see FIG. 1).

In the present embodiment, the copying machine using the electrophotographic technique has been described, but the present invention is not limited to this, and an image is formed on the linear image sensor constituted by a CCD or the like through the lens 19 to form the linear image sensor. Alternatively, the image information may be converted into an electric signal and the electric signal may be output as a copy image by using a thermal transfer printer or the like.

〔The invention's effect〕

According to the image forming apparatus of the present invention configured as described above, not only an image projected by OHP or a slide can be copied as a hard copy, but also characters, figures, etc. written by a felt pen or the like can be combined with the projected image. You can copy the image.

Therefore, for example, you can project the format information such as the frame of the chart on the screen by OHP etc., fill in the data etc. with the felt pen, use it for the explanation of the meeting, and then copy and distribute all the information. ， The conference can be conducted effectively.

[Brief description of drawings]

 FIG. 1 is a sectional view of an image forming apparatus of the present invention, FIG. 2 is a sectional view showing a copying state of a screen page, and FIG. 3 is a perspective view of the image forming apparatus of the present invention. 1 ... Frame, 2 ... Sheet member, 2a ... Screen page, 3 ... Moving mechanism, 4 ... Backup board, 5 ... Optical system, 6 ... Copying device, 7 ... Slit, 8 ... Roll Return roller, 9a, 9b, 9c, 9d …… Auxiliary roller, 10 …… Winding roller, 11 …… Light source, 12,13 …… Mark sensor, 14 …… Operating section, 15,16,17,18 …… Mirror, 19 ... Lens, 20 ... Movement table A, 20a ... Slit, 21 ... Movement table B, 22 ... Photoconductor, 23 ... Charger, 24 ... Developer, 25 ... Transfer paper, 26 …… Paper feed roller, 27 …… Standby roll, 28 …… Transfer device, 29 …… Cleaning device, 30 …… Fixing device, 31 …… Paper ejection roll, 32 …… Paper ejection tray, 33 …… Projection light , 34a, 34b …… Shading curtain, 35, 36 …… Shading curtain winding roll.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-53-27034 (JP, A) JP-A-59-212070 (JP, A) JP-A-59-212866 (JP, A) JP-A-60- 164770 (JP, A) Actual opening 55-41900 (JP, U) Actual opening 57-176767 (JP, U)

Claims (2)

[Claims] 1. A semitransparent display surface on which writing and erasing with a writing instrument and a light image can be projected from the outside, and a back surface opposite to the projection surface of the semitransparent display surface are slit while the semitransparent display surface is stationary. An image forming apparatus comprising an optical system for scanning and a copying unit for copying an optical image formed by the optical system, wherein a still image projected from the outside is copied by slit exposure. 2. The copying section comprises a photoconductor, a charging means for charging the photoconductor around the photoconductor, an exposure section for exposing the photoconductor by the optical system, and a static unit formed by the exposure section. The image forming apparatus according to claim 1, further comprising: a developing unit that visualizes the latent image with toner, and a transfer unit that transfers the toner image onto a sheet.