JPH0260188B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an image forming apparatus such as an electrophotographic copying machine, and more particularly to an image forming apparatus that directly copies characters, figures, etc. written on a blackboard (display member). It is something.

[Prior art and problems]

Conventionally, at meetings, lectures, etc., writing on display materials such as blackboards to eliminate the hassle of transcribing characters, figures, etc. written on display materials into notebooks, etc., and to prevent mistakes caused by transcription. A copying device has been proposed that directly copies .

Regarding conventional examples, various copying machines have been proposed that can selectively copy an image written on a sheet serving as a display member and a document on a document table.

The above-mentioned copying machine is composed of a copying section and a display section, and the copying section is movably placed between a position for copying an original and a position for copying the display section by means of a rail provided on the display section. Ta.

The copying section is provided with an exposure opening for display copying, and in the case of copying on the platen, the built-in shutter is closed, and in the case of display copying, the shutter is opened and the image exposure from the display sheet is The light was introduced through the exposure port to form an image on the photoreceptor drum.

However, in the conventional image forming apparatus having such a configuration, peripheral light leaks through the exposure port of the copying machine into which the optical path from the display section is introduced, and has an adverse effect on the image. Since the copying machine is movable, it is difficult to completely block light.

In addition, with a type in which a writable and erasable panel member moves back and forth in and out of the copying machine, only images on the panel can be copied and normal originals cannot be copied, and the panel moves in and out of the copying machine. Therefore, there was a drawback that a large panel could not be used and the practical area that could actually be used for writing was small.

[Purpose of the invention]

In view of the above-mentioned conventional drawbacks, the present invention provides an image forming apparatus that can selectively copy an image written on a display section and a document on a document table by blocking the image optical path from the display section from peripheral light. An object of the present invention is to provide an image forming apparatus that can obtain good images.

[Key points of the invention]

According to the present invention, the present invention provides a display unit having a writable and erasable display surface, a light source for exposing an image written on the display surface by a writing instrument, and an optical means; an exposure port for introducing the light image guided by the optical means into the interior, and a copying means for selectively copying the image on the display surface and the image of the document placed on the document table; In an image forming apparatus, the image forming apparatus includes a copying section that is movable between a first position for copying an image on the display surface and a second position for copying an image on the original document. It is movably supported by the display section so as to engage and move with the copying section as it moves to the first position, and introduces the optical image guided by the optical means through the exposure opening into the interior. This is achieved by providing an image forming apparatus characterized in that the image forming apparatus is provided with a blocking member that is interposed so as to surround the peripheral edge of the exposure aperture to block external light from leaking from the exposure aperture. .

[Embodiments of the invention]

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

FIG. 1 is a configuration diagram showing an image forming apparatus of the present invention;
2a and 2b are perspective views showing the operating state of the image forming apparatus of the present invention, FIG. 3 is a front view of main parts of the present invention, and FIG. 4 is a schematic configuration diagram of the display unit optical system of the present invention. 5a and 5b are operation state diagrams of the light shielding member of the present invention,
FIGS. 6a, 6b, and 6c are operation state diagrams showing the engaged state, the engaged and disengaged state, and the state in the middle of engagement of the copying section.

The image forming apparatus includes a display section 1 and a copying section 2. The copying section 2 is mounted on a mounting beam 2b and is provided so as to be removable.

As shown in FIGS. 5a and 5b, the copying section 2 includes a photosensitive drum 13, a charger (not shown) disposed around it, a blank lamp, a developing device, a transfer device, a cleaner, and a paper feed cassette (also not shown). , a paper feed roller, a timing roll, a fixing section that fixes the image on the copied paper, an ejecting section that ejects the paper to the outside of the machine, and an optical scanning mechanism.

The optical scanning mechanism exposes and scans the original image onto the photosensitive drum 13, and includes a halogen lamp 15 that illuminates the original, copying mirrors 16a, 16b,
16c, 16d, and a copying lens 17. Here, an exposure aperture 21 for display copying and an exposure aperture 22 for copying originals are provided on the upper surface of the copying section 2, and a shutter 20 is provided directly below the exposure aperture 21 for copying the display so as to be openable and closable. ing.

The display section 1 is a display sheet 1a (a long sheet member on which writing can be done with a felt-tipped pen or the like, and the written image can be wiped off with a cloth or the like, with a part of the sheet facing toward the outside of the display section 1). (exposed as a display surface), a roll group (not shown), a take-up roll, a backup board for backing up the sheet 1a exposed to the outside, a halogen lamp 14, mirrors 10 and 11, a display side lens 12, and a light shielding member. 6, and an operating section 23 at the front end.
is provided.

The display sheet 1a is wound around a take-up roll, and is taken up by a take-up roll driven by a drive device (not shown) via a group of rolls.

Further, the rolled up display sheet 1a forms a surface perpendicular to the backup board by the roll,
It is illuminated with a halogen lamp 14.

After copying, the display sheet 1a returns to its original position by driving a motor or the like by pressing a rewind button.

FIG. 4 is a schematic diagram of the optical system of the display unit.
The display sheet 1a moving while being wound up is illuminated by a halogen lamp 14.
The reflected light of the image illuminated by the light passes through the mirror 10, the mirror 11, and the display-side lens 12 along the display optical path 9, and forms an image on the rotating photosensitive drum 13 in the copying section 2. The mirror 10 is inclined at 45 degrees with respect to the display optical path 9, and bends the reflected light vertically backward with respect to the backup board. The bent reflected light is further bent downward by 90 degrees by the mirror 11, passes through the exposure aperture 21 of the copying part 2 by the display part side lens 12, and reaches the photosensitive drum 13 inside the machine.

Further, when the display section 1 and the copying section 2 are engaged, the light shielding member 6 is configured to be able to swing around a shaft 8 in the elongated hole 7 so as to be positioned directly above the exposure port 21 of the copying section 2. Supported by Section 1. And the light shielding member 6
has a housing shape, and a brush 6a is planted on the lower edge surface. The solid line in FIG. 1 shows the state in which the image forming apparatus of the present invention copies the display section 1, and the light shielding member
covers the periphery of the display section copying exposure opening 21 of the copying section 2 to block harmful light from the outer periphery, and guides the display section optical path 9 of the display section 1 onto the photoreceptor drum 13.

FIG. 3 is a front view of the main parts of the light shielding member 6 seen from the front. As shown in the figure, the housing-like light shielding member 6 includes
Since the brush 6a is planted on the lower edge surface, it comes into soft contact with the upper surface of the copying section 2. Therefore, the copying section 2 is pulled out to the front, and from the state where the original is being copied (FIG. 6b), the copying section 2 is pushed along the placement beam 2a (FIG. 6c), and finally Until the display section 1 and the copying section 2 reach the engaged state (FIG. 6a), the light shielding member 6 comes into soft contact with the copying section 2, so that it will not be damaged.

Further, when the copying section 2 changes from the state in which it is pulled out to the front to the state in which it is combined with the display section 1, the document table 3 is automatically retracted to a position where the exposure port 21 is opened.

Then, the shutter 20 located directly below the exposure aperture 21
is controlled by a solenoid to open at the same time as the display copy button is turned on.

5a and 5b show the relationship between the movement of the document table 3 of the copying section 2 and the light shielding member 6. FIG. When copying an image written on display section 1, that is, display section 1 and copy section 2
If the original platen 3 is not stored in the display unit 1 in the normal position (Fig. 5a) when the originals are combined, it will be moved to the state shown in Fig. 5b (home position). Then, it moves to the position a (display position) in the figure and stops.

At this time, the light shielding member 6 and the document table 3 collide with each other, which is inconvenient. This problem can be avoided by making the brush 6a of the light shielding member 6 longer, but the light shielding becomes incomplete and a long brush increases the cost. Therefore, in the present invention, the mounting portion is configured by the shaft 8 and the elongated hole 7 so that the light shielding member 6 can move upward and tilt counterclockwise when it collides with the document table 3. This allows the light shielding member 6 to swing in accordance with the movement of the document table 3.

6a, b, and c show the relationship between the insertion and removal of the copying section 2 and the light shielding member 6. FIG. The copying section 2 is the display section 1
When the copying machine is stored in the machine, it is in the state shown in FIG. 5A, but when the copying machine is pulled out during normal copying, it is in the state shown in FIG. At this time, the shutter 20 is closed inside the copying section 2. Next, when trying to store the copying section 2 in the display section 1 again, unless some measures are taken, the copying section 2 and the light shielding member 6 may collide and be damaged, which is inconvenient. For this reason, in the present invention, as shown in FIG. 6 is provided with an inclined surface 6b, and the light shielding member 6 is lifted upward by the guidance of the inclined surface 6b, so that it can adapt to the movement of taking in and taking out the copying section 2.

As described above, according to the present invention, the connecting part of the optical system between the board part and the copying part can be completely shielded from harmful light on the outer periphery, and it is also possible to freely cope with the movement of the document table and the movement of the copying part itself. You can.

〔Effect of the invention〕

According to the image forming apparatus of the present invention configured as described above, when copying the display surface of the display section, the exposure opening of the copying section and the image optical path of the display section are blocked from harmful light on the outer periphery by the light shielding member. Therefore, a good image can be obtained when copying the display section.

Further, even when the document table of the copying section moves and the exposure aperture is hidden under it, the light shielding member swings according to the supported elongated hole and does not interfere with the movement of the document table.

Furthermore, when the copying section is pulled out to the front side of the display section and when pushed back to the engagement position, the light shielding member can be freely moved upwardly and downwardly by the cover of the copying section or the document table. does not impede movement.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an image forming apparatus of the present invention;
2a and 2b are perspective views showing the operating state of the image forming apparatus of the present invention, FIG. 3 is a front view of main parts of the present invention, and FIG. 4 is a schematic configuration diagram of the optical system of the display unit of the present invention. 5
6A and 6B are operation state diagrams of the light shielding member of the present invention, and FIGS. 6A, 6B, and 6C are operation state diagrams showing the engaged state, the engaged and disengaged state, and the middle of engagement of the copying section. DESCRIPTION OF SYMBOLS 1... Display part, 1a... Display sheet, 2... Copying part, 2b... Placement beam, 3... Document table, 6... Light shielding member, 6a... Brush, 6b... Inclined surface, 7...
...Elongated hole, 8...Axis, 9...Optical path for display section, 10...
...Mirror, 11...Mirror, 12...Lens, 1
3...Photosensitive drum, 14...Halogen lamp,
15...Halogen lamp, 16a, 16b, 16
c, 16d... mirror for copying, 17... lens for copying, 20... shutter, 21, 22... exposure aperture, 23... operation unit.

Claims (1)

[Scope of Claims] 1. A display section having a writable and erasable display surface, a light source that exposes an image written on the display surface by a writing instrument, and an optical means, a document table, and the optical means. an exposure port for introducing a light image guided thereinto, and copying means for selectively copying the image on the display surface and the image of the document placed on the document table; In an image forming apparatus comprising a copying section that is movable between a first position for copying an image on a surface and a second position for copying an image of the document, the first position of the copying section movably supported by the display section so as to engage and move with the copying section when moving to a position, and when introducing the optical image guided by the optical means through the exposure opening into the interior; An image forming apparatus comprising: a blocking member that is interposed to surround a peripheral edge of the exposure opening to block external light from leaking from the exposure opening.