JPS628184A - Image forming device - Google Patents

Abstract

PURPOSE:To copy a projection image (still picture) on a sheet member by providing an optical system which scans a translucent display surface where a light image is projected and the reverse surface on the opposite side from the projection surface of the translucent display surface and a copying part which copies the light image formed by the optical system. CONSTITUTION:When the screen copy button of an operation part 14 is depressed, moving tables A20 and B21 move to scanning part points respectively. When a slit 20a bored in the moving table A20 moves to scan at an equal speed from the upper part of a display part to the lower part together with the moving table A20 where a mirror 16 is fixed. At this time, a screen page 2a still stops at the display part. The moving table B21 which supports mirrors 17 and 18 also move up as the moving table A20 moves, but the moving speed is a half as fast as that of the moving table A20. This optical system moving mechanism maintains constant optical distance from the reverse surface of the screen page 2a to a photosensitive body 22 through mirrors 16-18 and the distance between object images is made unchanged.

Description

DETAILED DESCRIPTION OF THE INVENTION [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 still images projected onto a board sheet.

[Traditional technique]

In conventional image forming apparatuses, characters written on board sheets to improve the efficiency of meetings, etc.

A so-called blackboard copying machine has been proposed which can directly copy figures and the like to obtain hard copies.

In this method, for example, a board sheet written with a felt-tip pen or the like is moved and exposed, and the reflected light is guided to a copying device using electrophotographic technology to copy the board surface.

Furthermore, it has a plurality of pages of writeable and erasable board surfaces, and one of the plurality of pages has an over 7 dome blocker (QU).
There were also devices equipped with a page on a screen for projecting images, such as IP) and projectors.

[Problems with conventional technology]

The image forming apparatus configured as described above can copy the character 0 graphic written on the board sheet, but has the disadvantage that it cannot copy the image projected on the screen.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, 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.

[Key points of the invention]

According to the present invention, the above object is to provide a semi-transparent display surface on which a light image is projected, an optical system that scans the back surface of the semi-transparent display surface that is opposite to the projection surface, and a light image formed by the optical system. This is achieved by providing an image forming apparatus characterized by comprising a copying section that copies the image.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to two 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 blocks external light, a sheet member 2 disposed inside the frame 1, and the sheet member 2.
a moving mechanism 3 that winds up the sheet member 2 by a group of rollers, and the sheet member 2
A backup board 4 made of a transparent member that prevents the display surface from deflecting; an optical system 5 provided on the back surface of the sheet member 2; a copying device 6 that copies images formed by the optical system 5; It consists of

The sheet member 2 includes a plurality of pages (one page is the area that is exposed when stopped on the display part of the frame) made of a white flexible material that can be written on with a felt-tip pen, etc., and a 7-gutter ejector that extends over the area. (hereinafter referred to as 0HP) and a screen page 2a on which images can be projected using a projector or the like.

The screen page 2a is exposed over the entire display area, has an area equivalent to one page, and is made of a semi-transparent member.

Here, the semi-transparent member is a frosted glass-like cloudy semi-transparent material, on which a projected image of (P, slide, etc.) is formed, and the image can be visually observed from the front and back sides. refers to something that can be done.

Further, the screen page 2a is made of a material that can be written on and erased using a felt pen or the like, like the other sheet member parts.

The moving mechanism 3 consists of a plurality of roller groups disposed above and below one display section, and two rewind rollers 8 and an auxiliary roller 9a are provided below the display section. A portion of the sheet member 2 is wound.

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

Further, the sheet member 2 that has been wound up twice is transported to the auxiliary rollers 9c and 9.
d forms a plane perpendicular to the backup board 4,
The vertical plane is illuminated by a light source 11.

Furthermore, a page detection mark and a timing mark (not shown) are provided for each page on the right and left ends of the sheet member 2, and a mark sensor 12 provided near the moving mechanism 3
．． At step 13, the page detection mark and timing mark are detected, and a desired page is displayed on the display section in response to an operation signal from the operation section 14.

The optical system 5 is composed of a light source 11 that illuminates the image on the sheet member 2 at a reading position, mirrors 15, 16, 17, 18, a lens 19, etc. Read the image on the position.

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

Furthermore, the movable table A20 and the movable table B21 are operated by a moving mechanism (not shown) as shown by the dashed line in FIG.

It is provided so as to be movable in the vertical direction parallel to the backup board 4.

Furthermore, a slit 20a is provided in the movable table A20 over substantially the entire width of the display section 9, and a slit 20a is provided in the moving table A20.
One ends of light shielding curtains 34a and 34b are fixed to the upper and lower ends of a.

The other ends of the 'a light curtains 34a and 34b are each fixed to a light shielding curtain take-up roll 35, 36, and are constantly wound in the direction of the arrow by a torsion spring or the like.

Then, when the moving table A20 moves, the light-shielding curtains 34a, 34b move each light-shielding curtain winding roll 3 according to the movement.
From 5.36, one side is unwound and the other side is wound up 8 times.

Further, the surfaces of the four bank-up boards of the light-shielding curtains 34a and 34b are white, and the optical system side is black, so that it is easy to see even if nine black characters are written on the translucent screen page 2a with a felt-tip pen or the like. .

The copying device 6 includes a charger 23 and a developer 24, which uniformly charge the photoreceptor 22 and the surface of the photoreceptor 22 disposed around the photoreceptor 22. Transfer paper 25. Paper feed roller 2 that feeds the transfer paper 25 one sheet at a time.
6. Transfer IE25 in synchronization with the image on the surface of photoreceptor 22
A standby roll 27 for conveying the images, a transfer device 28. A cleaning device 29 for cleaning residual toner on the photoreceptor 22
A fixing device 30 that fixes the 5 images onto the transfer paper 25. A paper discharge roll 31 for discharging the transfer paper 25 outside the machine. It is composed of a paper discharge tray 32 that receives and stops the discharged transfer paper 25, and the like.

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

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

Now, light 3 is projected onto the screen page 2a by an OHP device or the like.
The case of copying the image projected by step 3 will be explained.

Screen page 2. The image projected on a using an OHP, etc., and the characters, figures, etc. written with a felt-tip pen, etc.

Since the screen page 2a is semi-transparent like frosted glass, it can be read as an optical image even on the back side of the projection surface.

When you press the screen copy button on the operation unit 14, the moving platform A2
0 and the moving table B21 move from the position indicated by the dashed-dotted line in FIG. 2 to the position indicated by the solid line below, and then move to the scanning start point position, respectively. Next, the slit 20 bored in the moving table A20
A moves and scans the display section from bottom to top at a constant speed together with a movable table A20 to which a mirror 16 is fixed. At this time, the screen page 2a remains stopped at one display section.

Also a moving platform B21 supporting mirrors 17,18.

It moves upward in response to the movement of the moving table A20.

This moving speed is half the speed of the moving table A20.

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

The projected image is scanned by the movement of the mirror 16.

Photoreceptor 22 by lens 19 via mirrors 17 and 18
a copying device 6 using known electrophotographic techniques;
The image is then copied onto the transfer paper 25.

Therefore, according to the image forming apparatus of the present invention, an image projected on a screen and two written characters and figures can be combined and copied.

Furthermore, even when the translucent screen page 2a is exposed to the display section, the light-shielding curtains 34a and 34b are arranged on the back side, so that external light or projection light from an OHP or the like can be transmitted to the mirror 17, which is an optical system part. .1B, it does not reach the lens 19, etc., and does not adversely affect image formation.

In addition, the light for copying the screen page 2a is all 7)
An image is formed using only the light that has passed through 20a.

Further, the scanning speed of the optical system 5 and the moving speed of the photoreceptor 22 are all synchronized.

On the other hand, in the movement path of the moving table 20, two position detection switches (not shown) are installed at the home position (the position shown by the solid line in FIG. 1), the image forming start point position in the screen page copy mode, and the moving table A
A plurality of image formation end point positions are provided, each corresponding to the image formation end point position at which the screen page is scanned.

Further, a timing signal (transfer paper refeeding synchronization signal) in the screen page copy mode is issued after a predetermined time has elapsed from the activation of the switch provided at the image formation start position.

Next, when copying the image written on the sheet member 2, it is done by pressing the board copy and designated page buttons on the operation unit 14.

Control of page movement of the sheet member 2 is performed by mark sensors 12 and 13 provided at positions corresponding to page detection marks and timing marks (not shown) provided on the right and left ends of the sheet member 2, respectively.

For board copying, use mobile platform A20. The movable table B21 remains stationary and performs scanning by winding up the sheet member 2 at a constant speed at the reading position (see FIG. 1).

2. In this embodiment, a copying apparatus using electrophotographic technology has been described, but the present invention is not limited to this.

A format in which an image is formed via a lens 19 on a linear image sensor configured with a COD or the like, the image information is converted into an electrical signal by the linear image sensor, and this electrical signal is output as a copy image using a thermal transfer printer or the like. It may be of.

〔Effect of the invention〕

According to the image forming apparatus of the present invention configured as described above, it is possible not only to copy an image projected on an OHP or a slide as a hard copy (also, it is possible to copy characters, figures, etc. written on the projected image with a felt-tip pen or the like). The combined image can be copied.

Therefore, 1. For example, format information such as diagram frames etc.
After projecting the data onto the screen with a felt-tip pen and using it to explain the meeting, all the information can be copied and distributed, allowing the meeting to proceed effectively. .

[Brief explanation of drawings]

FIG. 1 is a sectional view of an image forming apparatus according to the present invention. FIG. 2 is a cross-sectional view showing the copying state of the screen page. FIG. 3 is a perspective view of an image forming apparatus according to the present invention. 1...Frame. 2...Sheet member. 2a...Screen page. 3...Movement mechanism. 4...Backup board. 5...Optical system. 6... Copying device. 7...Slit. 8... Rewind roller. 9a...! Ib, 9c, 9d...Auxiliary rollers. 10... Winding roller. 11...Light source. 12.13...Mark sensor. 14...Operation unit. 15.16, 17.18... Mirror. 19...Lens. 20...Moving table A. 20a・・・・Slit. 21...Moving table B. 22...Photoreceptor. 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 discharge roll. 32... Paper output tray. 33... Projection light. 34a, 34b...shading curtains. 35.36...Shading curtain winding roll.

Claims (2)

[Claims] (1) A semi-transparent display surface on which a light image is projected, an optical system that scans the back surface of the semi-transparent display surface that is opposite to the projection surface, and a copying section that copies the light image formed by the optical system. An image forming apparatus comprising: (2) The image forming apparatus according to claim 1, wherein the semi-transparent display surface is a writable and erasable display surface.