JPH0668661B2 - Blackboard copier - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a blackboard / copier that can copy characters, figures, and the like drawn on a display member such as a blackboard that can be written and erased.

[Prior art]

Conventionally, in the above-mentioned blackboard copying machine, a display unit having the above-mentioned display member and a copying unit having a photoconductor, a developing device and the like are integrated to form an image on the display member. It is known that characters, figures, etc. are projected on a photoreceptor by an optical system in a reduced size and copied by a series of electrophotographic processes.

[Problems of conventional technology]

In the conventional blackboard copier, the display unit and the copying unit are integrated as described above. Therefore, while using an expensive electrophotographic process, only the information drawn on the display member can be copied, and it is impossible to copy an ordinary document.

[Object of the Invention]

The present invention provides a blackboard / copier that can copy both information on a display member and a normal manuscript, and can move to a position where the display member does not hinder the copying operation when copying a normal manuscript. The purpose is to provide.

[Main points of the invention]

In order to achieve the above object, the present invention provides a display unit having a display member that can be written and erased by a writing instrument, a pedestal that supports the display unit from the floor surface, and information or a document described on the display member. In a blackboard-combining copying machine comprising a copying section for selectively copying a document placed on a table and an optical system for guiding the light exposing the display member to the copying section, the display section is provided by the copying section. A first position at which the information can be copied, and above the first position,
It is characterized in that it has a moving means for moving the original to a second position where the original can be copied by the copying section.

Example of Invention

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 5 show the appearance of a blackboard / copying machine according to an embodiment of the present invention. This device comprises a board unit 1, a copying unit 2 and a supporting unit 3. Here, the support portion 3 is a vertically elongated hollow outer rail 4a, 4b, and a hollow inner rail 5a, 5b slidable in the up and down direction guided in the outer rail 4a, 4b. A mounting table 6 for mounting the section 2 is provided. The board portion 1 is supported at its both ends by the inner rails 5a, 5b and can be moved in the vertical direction by a moving means as described later, and the first position shown in FIGS. 3 to 5 and the first position shown in FIG. The second position shown in FIGS. 1 and 2 can be taken above the position. Here, the first position is a position when a character, a graphic or the like drawn on the board sheet 7 is copied by the copying unit 2 (hereinafter referred to as a board copy), and the second position is This is the position when a normal document is copied by the copy unit 2 (hereinafter referred to as document copy).

Next, the board unit 1 will be described in more detail. FIG. 6 is a sectional view taken along the line AA of the board portion 1 shown in FIG.
Here, a winding roller 8, a rewinding roller 9, feed rollers 10a to 10d, and the like are provided as means for winding the sheet-like board sheet 7. The board sheet 7 is wound up by winding a large number of board sheets 7 wound around a rewinding roller 9 onto a winding roller 8 via feed rollers 10a to 10d, and rewinding is reversed. It is performed by winding it around the return roller 9. Board sheet 7
Is the flat portion 7a between the feed roller 10c and the feed roller 10d.
To form. A flat hard backup board 11 is arranged inside the plane portion 7a, and when writing on the plane portion 7a, the plane portion 7a is supported from the inside to facilitate writing.

The board unit 1 also includes an optical system including a fluorescent lamp 12, a first mirror 13, a second mirror 14 and a projection lens 15. When copying characters or the like written on the plane portion 7a of the board sheet 7 by the copying unit 2, the board that moves between the two feed rollers 10a and 10b while winding the board sheet 7 by the take-up roller 8 Fluorescent lamp 1 on the sheet 7
Scan with 2 light. The optical path of the reflected light L1 from the board sheet 7 at this time is shown in FIG. The reflected light L1 is this reflected light
It is bent 90 degrees by the first mirror 13 which is arranged at an angle of 45 degrees with respect to L1, and further bent 90 degrees downward by the second mirror 14, and is exposed in the copying section 2 through the lens 15. The photosensitive surface 16a of the body drum 16 is irradiated with the light.

Next, the copying section 2 will be described in more detail. FIG. 8 is a schematic configuration diagram of the inside of the copying unit 2. The manuscript table 17 is composed of a manuscript glass 17a, a manuscript cover 17b, etc., and is placed on the manuscript glass 17a when the board portion 1 takes the above-mentioned second position (positions of FIG. 1 and FIG. 2). Originals (not shown) can be copied. When copying a document, the document is irradiated through the exposure port 25 for copying the document of the light source 18, and the reflected light L2 from the document is reflected by the first mirror 19, the projection lens 20, and the second mirror 21. It irradiates on the photosensitive surface 16a of the photosensitive drum 16 via the. In the following, document copying is completed through the developing device 22, the transfer device 23, the fixing device 24, etc. by a known electrophotographic process.

In addition, on the upper surface of the copying unit 2, for guiding the reflected light L1 emitted from the board unit 1 at the above-mentioned first position (positions of FIGS. 3 to 5) at the time of board copying. Exposure mouth 26
Is provided. Below the exposure port 26, a shutter 27 is provided to prevent outside light from entering the inside of the copying section 2 when copying a document. It should be noted that the lens 20 and the shutter 27 are each movable to a position indicated by a solid line when copying a document and to a position indicated by a dotted line that does not block the reflected light L1 when copying a board. Further, the document table 17 moves at a constant speed in the left-right direction at the time of copying a document, but stops at a position where the reflected light L1 is not blocked at the time of board copying. Therefore, when the board is copied, the reflected light L1 from the board unit 1 is applied to the photosensitive surface 16a of the photosensitive drum 16 through the exposure port 26. Then, similarly to the document copy, the copy is completed by the known electrophotographic process. As shown in FIGS. 2 and 4, a light blocking member 28 is provided below the board portion 1 so as to surround the optical path of the reflected light L1, and a brush 28a is provided around the lower end thereof. ing. This brush 28a
Covers the periphery of the exposure port 26 by contacting the upper surface of the copying unit 2 when the board unit 1 is at the first position, thereby eliminating the influence of light leakage and external light at the time of copying the board.

Next, the moving means provided in the support part 3 for moving the board part 1 in the vertical direction will be described.

FIG. 9 is a partial BB sectional view of the support portion 3 shown in FIG. Here, screw portions 29a, 29b, which are internally threaded in the vertical direction, are fixedly provided at the inner lower ends of the inner rails 5a, 5b. Bearings 30a and 30b are fixedly installed inside the outer rails 4a and 4b, and a long rotating shaft 31 having a male screw in the vertical direction is provided.
The lower ends of a and 31b are pivotally supported. It should be noted that one rotating shaft 31a is threaded with a right screw and the other rotating shaft 31b is threaded with a left screw. Screw parts 29a, 29b are screwed onto these rotary shafts 31a, 31b, and the screw parts 29a, 29b are rotated by the rotation of the rotary shafts 31a, 31b.
The inner rails 5a and 5b move up and down via the. Two
Hollow horizontal part 3 between the two outer rails 4a and 4b
Inside the 2, a motor 33 is fixedly installed. The motor shaft 34 extends into the outer rails 4a and 4b via bearings 35a and 35b. Bevel gears 36a and 36b are fixed to both ends of the motor shaft 34, and bevel gears 37a and 37b fixed to the rotary shafts 31a and 31b.
Are in mesh with each other. The rotation of the motor 33 passes through the bevel gears 36a, 36b, 37a, 37b in a direction perpendicular to the rotation shaft 3
It is transmitted to 1a and 31b. In FIG. 9, when the motor shaft 34 is viewed from the direction of arrow C, when the motor shaft 34 rotates clockwise, the inner rails 5a and 5b rise, and when the motor shaft 34 rotates counterclockwise, the inner rails 5a and 5b descend.

Next, a control means for vertically moving the board portion 1 supported by the inner rails 5a and 5b will be described.

As shown in FIG. 1, a board operation unit 38 is provided on the front surface of the board unit 1, and a lowering instruction switch 38a for instructing the start of lowering of the board unit 1 and a raising instruction switch 38b for instructing the start of raising. Etc. are provided. A document cover switch 39 that is turned on when the document cover 17b is closed is provided on the document table 17. Further, as shown in FIG. 9, a limit switch 40 is provided below the inside of the outer rail 4a.
Is fixed. The limit switch 40 is at the first position (see FIG. 3 or 4) where the board unit 1 can copy the board.
(Position shown in the figure), it is provided at a position where it is turned on by the lower end of the screw portion 29a. As a safety measure, an infrared light emitter 41 and a sensor 42 for receiving the infrared light are arranged opposite to each other outside the outer rails 5b and 5a. The infrared light emitter 41 and the sensor 42 are arranged at the fifth position.
As shown in the figure, when the board unit 1 is lowered to the first position (that is, when the limit switch 40 is turned on by the inner rail 5a), the input light to the sensor 42 is at the lower end of the board unit 1. It is set at a position that is blocked by or slightly above it.

Figure 10 shows the circuit for controlling the vertical movement.

Here, the control circuit 43 includes the above-described descending instruction switch 38.
Signals from a, the rising instruction switch 38b, the document cover switch 39, and the limit switch 40 are input. Control circuit 43
When the rising instruction switch 38b is closed and a signal is input from the input terminal I ₂ , a signal for causing the motor 33 to rotate upward (hereinafter referred to as a rising signal) is output from the output terminal O ₀ .
The control circuit 43 contains a timer (not shown) that is triggered by an input signal from the input terminal I ₂ . This timer is set to operate for the time required for the board part 1 to rise from the first position to the second position,
The output of the rising signal is stopped by the time up. Further, the control circuit 43 has two input terminals I ₃ and I ₁ when the lowering instruction switch 38a and the document cover switch 39 are closed.
When the signal is input from, a signal for rotating the motor 33 downward (hereinafter referred to as a downward signal) is output from the output terminal O ₁ . The output of this descending signal is stopped when the limit switch 40 is closed and a signal is input from the input terminal I ₀ .

The ascending signal and the descending signal output from the output terminals O ₀ and O _{1 of the} control circuit 43 are guided to the motor control circuit 44, respectively. The motor control circuit 44 rotates the motor 33 upward or downward according to the input upward or downward signal. The motor control circuit 44 operates the infrared light emitter 41 and inputs the output signal from the sensor 42, and stops the motor 33 when the infrared light path is interrupted.

Next, the raising and lowering operations of the board 1 will be described with reference to the flowcharts of FIGS. 11 (a) and 11 (b).

FIG. 11 (a) shows that the board unit 1 is moved from the first position (FIGS. 3 and 4) to the second position (first position) in order to copy a document.
FIG. 2 is a flow chart when the temperature is raised to FIG. First, when the rising instruction switch 38b is pressed (ST1), the rising signal is output from the output terminal O ₀ of the control circuit 43. Then, the motor 33 is rotated upward by the motor control circuit 44 (ST2). Simultaneously with the start of the upward rotation of the motor 33, the timer in the control circuit 43 is triggered (ST3). Board part 1
When is raised to the second position, this timer times up (ST4) and the motor 33 stops (ST5). In this state, the original copy can be made. The operation of copying a document is performed by the copy operation unit 45 shown first.

FIG. 11 (b) shows the board unit 1 for copying the board.
2 is a flow chart when lowering from the second position to the first position. First, when the lowering instruction switch 38a is pressed (ST11), it is confirmed by the document cover switch 39 whether or not the document cover 17b is closed (ST12). Original cover
When 17b is opened, the descending operation is not performed, and the document cover 17b is prevented from being damaged. Document cover switch 3
If 9 is closed (that is, if the document cover 17b is closed), a down signal is output from the output terminal O ₁ of the control circuit 43, and the motor control circuit 44 causes the motor 33 to rotate down (ST13). Board part 1 descends, screw part 29a (Fig. 9)
When the lower end of the pushes the limit switch 40 (ST14), the motor
33 stops (ST15). At this time, the board unit 1 is in the first position, and board copying is possible in this state.

The board copy operation is performed by the board operation unit 38 shown in FIG.

If the input light to the sensor 42 by the infrared light emitter 41 shown in FIG. 9 is interrupted during the ascending or descending operation, the motor control circuit 44 immediately stops the rotation of the motor 33 and the board Part 1 stops as it is. By doing so, the lowering instruction switch 38
It is intended to prevent danger when the user presses a and touches the copy unit 2 while the board unit 1 is descending.

In the above embodiment, the motor 33 is used as the vertical moving means.
However, other methods such as a gas cushion, an air damper, a hydraulic pressure, or a parallel movement mechanism with a balancer can be used.

〔The invention's effect〕

As described above, according to the present invention, the display section and the copying section are separately provided without being integrated, and the display section can be located at two positions with respect to the copying section. Not only board copy but also original copy can be easily performed with one device.

Further, since the display unit can take the first position and the second position in the vertical direction, it is not necessary to provide a space necessary for moving the position around the device, and the installation area of the device can be reduced. Can be very low.

[Brief description of drawings]

1 is an embodiment of the present invention, a perspective view showing a state in which the board portion is in the second position, FIG. 2 is a side view of the embodiment of FIG. 1, and FIG. 3 is FIG. 3 is the same as the embodiment of FIG. 3, but showing the board part in the first position, FIG. 4 is a side view of the embodiment of FIG. 3, and FIG. 5 is one of the embodiments of FIG. Front view, FIG. 6 is a schematic sectional view taken along line AA of the board shown in FIG. 3, FIG. 7 is a schematic view showing an optical system of the board shown in FIG. 6, and FIG. FIG. 9 is a schematic configuration diagram showing the inside of a copying section according to an example, FIG. 9 shows a moving means for moving the board section in the vertical direction, a partial BB sectional view of FIG. 2, and FIG. Circuit diagrams for controlling the moving means, FIGS. 11 (a) and 11 (b) are flowcharts for explaining the operation of the circuit in FIG. 1 ... Board part, 2 ... Copying part, 3 ... Support part, 4a, 4b ... Outer rail, 5a, 5b ... Inner rail, 29a, 29b ... Screw part, 31a, 31b ... Rotation axis, 33 …… Motor, 40 …… Limit switch, 43 …… Control circuit, 44 …… Motor control circuit,

Continuation of the front page (56) Reference JP-A-51-92626 (JP, A) JP-A-53-27034 (JP, A) JP-A-59-171695 (JP, A) JP-A-59-212866 (JP , A) JP 59-171695 (JP, A) JP 59-212866 (JP, A) JP 59-212070 (JP, A) JP 61-290467 (JP, A) JP 61-290468 (JP, A) Actually opened 50-140451 (JP, U) Actually opened 61-74487 (JP, U) Actually opened 61-79342 (JP, U) Actually opened 61-93288 (JP, U) Japanese Patent Publication Sho 57-18169 (JP, B2)

Claims (1)

[Claims] 1. A display unit having a display member that can be written and erased by a writing instrument, a pedestal that supports the display unit from the floor surface, and information placed on the display member or a document table. A copying section for selectively copying an original document and an optical system for guiding the light exposing the display member to the copying section, wherein the display section copies the information by the copying section. And a second position which is above the first position and above which the original can be copied by the copying unit. Blackboard copier.