JPH085274B2 - Copying device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a copying apparatus capable of copying an image written on a display member, and more particularly, to moving a sheet-shaped display member having a length of a copy page. The present invention relates to page detection in a copying apparatus that performs copying by copying.

[Prior art]

Conventionally, characters, figures, and the like written on the blackboard in metal, lectures, etc. have been transcribed in a notebook. However, as a means for preventing the troublesomeness and erroneous writing at the time of transfer, a copying apparatus has been proposed which can directly copy characters written on a board sheet which is a white resin sheet having good releasability.

For example, write letters and the like on a board sheet having a length of multiple pages that can be written and erased with a felt pen,
This is a device for copying characters and the like written on the surface of a board sheet by exposing and scanning while moving the boat sheet.

Conventionally, the board sheet used for such a device is the second
As shown in the figure, the first page leading edge detection mark 1b is provided at one location on the upper edge of the board sheet 1a, and the leading edge sensing mark 1c on each page other than the first page is placed at several locations at the lower edge of the board sheet 1a.
Is provided, and the marks 1b and 1c are detected by two sensors such as a photo reflector (not shown) provided on the housing side of the board sheet 1a and used to detect each page when the board sheet 1a is wound. For example, when a power source (not shown) is turned on, rewinding starts in the direction of arrow 1d, and when the sensor detects the page leading edge detection mark 1b of the first page, the board sheet 1a stops moving, and then winds in the direction of arrow 1e. Starting, the pages were added every time the leading edge detection mark 1c of each page was sequentially detected during winding, and each page or required page was copied.

[Problems of conventional technology]

In the copying machine as described above, the board sheet 1a must be moved to the first page when the power is turned on. Therefore, when the power is turned off and then turned on again during the operation, the board sheet 1a moves from the in-use page to the first page. Therefore, it takes time for so-called initialization to return to a page requiring writing or copying of an image.

〔The invention's effect〕

In view of the above-mentioned conventional drawbacks, the present invention provides a copying machine having a board sheet, in which when the power is turned on, the board sheet stops at the nearest page and the initialization time can be shortened. The purpose is.

[Main points of the invention]

In order to achieve the above object, the present invention is a detection apparatus for detecting a page mark corresponding to a page on a display member in a copying apparatus for copying an image written on a display member having a length of a plurality of pages. Means, display means for displaying the page detected by the detection means, and control means for controlling the display member to move in the first direction and in a second direction opposite to the first direction. , When the power of the copying machine is turned on,
When the middle of the page is exposed, the control means
After moving the display member in the first direction for a predetermined time, the detection means moves the display member in the second direction until detection of the page mark on the display member is completed, and then the page mark is detected. It is characterized in that the page closest to the display member is exposed by moving in the first direction by a distance corresponding to the position.

Example of Invention

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

3 and 4 are perspective views showing the copying apparatus of the present invention.

The copying apparatus is composed of a board section 1 which is a display section unit and a copying section 2 which is a copying section unit. The copying section 2 is mounted on a mounting beam 2b and is provided so that it can be taken in and out.

As shown in FIG. 5, the copying section 2 includes a photoconductor drum 12, a charger 13 arranged around the photoconductor drum 12, a blank lamp 14, and a developing device.
16, a paper feed cassette 17, a paper feed roller 18, a timing roll 19, a transfer unit 20, a cleaner 21, a fixing unit 22 for fixing an image on a copied paper, a discharge unit 23 for discharging the paper out of the machine, and a document scanning mechanism. It consists of and.

The document scanning mechanism consists of a halogen lamp 24, which illuminates the document.
Copying first mirror 25, copying second mirror 26, copying lens
27 and original glass 28, and the original glass 28
The one including the leading end instruction plate 29 and the document cover 30 is referred to as a document table 2a.

Here, on the upper surface of the copying section 2, there is an exposure port for board copy.
An opening 31 and an exposure opening 32 for copying are provided, and a shutter 33 is provided directly below the exposure opening for copying the board so as to be openable and closable.

As shown in FIG. 6, the board unit 1 includes a board sheet 3, rolls 4a, 4b, 4c, 4d, a winding roll 5, a rewinding roll 6, a backup board 7, a fluorescent lamp 8, a board-side first mirror 9, a board. Side second
It is composed of a mirror 10 and a board side lens 11, and an operation unit 40 is provided at the front end.

The board sheet 3 is wound around the rewinding roll 6, 4
It is wound by a winding roll 5 driven by a winding motor (not shown) via a, 4b and 4c.

Also, when wound up, the board sheet 3 is rolled into rolls 4b, 4
A surface perpendicular to the backup board 7 is formed by c and illuminated by the fluorescent lamp 8.

At the time of rewinding, it is rewound by a rewinding roll 6 driven by a rewinding motor (not shown). The position detection at the time of winding or rewinding is performed by detecting a mark, which will be described later, provided on the board sheet 3 by the optical sensor 62.

FIG. 7 is a schematic configuration diagram of the board optical system. The reflected light from the image illuminated by the fluorescent lamp 8 follows the board optical path and is the board-side first mirror 9, the board-side second mirror 10,
Through the board side lens 11, the photoconductor drum in the copying section 2
Imaged on 12. The board-side first mirror 9 is inclined by 45 degrees with respect to the board optical path, and refracts the image vertically rearward with respect to the surface of the board sheet 3. The refracted image is further bent 90 degrees downward by the board-side second mirror 10, passes through the exposure port 31 of the copying section 2 by the board-side lens 11, and reaches the photoconductor drum 12 in the machine.

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

First, when copying an image written on the board sheet 3, the copying unit 2 is housed in the position B as shown in FIG. Then, as shown in FIG. 5, the shutter 33 is interlocked, the exposure port 31 for board copying is opened, and the document table is opened.
2a moves in the direction of the arrow, allowing the board optical path to enter. Here, reflected light from images such as letters and figures of conferences, lectures, etc. written on the board sheet 3 passes through the board irradiating section at a predetermined speed by the driving mechanism, and is irradiated by the fluorescent lamp 8 so that the board side. An image is formed on the photosensitive drum 12 via the first mirror 9, the board-side second mirror 10, and the board-side lens 11.

The electrostatic latent image formed on the photoconductor drum 12 by the above image exposure is copied onto a sheet by the developing, transferring, and fixing mechanism, and the copied sheet is discharged to the outside of the machine.

The operation section of the board section 1 has the structure shown in FIG.
Designation buttons 41 to 45 for designating the first to fifth pages
And display lamps 46 to 50 on each page, a copy button 51 for instructing copying, a density adjustment dial 52, an alarm lamp 53,
It is composed of a weight lamp 54 and a power switch 55a. When the designation buttons 41 to 45 are pressed, the page is moved to one of the designated pages, and one of the designated display lamps 46 to 50 is turned on. When the copy button 51 is operated, the displayed page is copied.

Furthermore, the alarm lamp 53 indicates that the copy unit 2 is in a copy-disabled state,
For example, it lights up when paper jams, no appearance, no toner, etc.
When the alarm lamp 53 is on, the copy operation is not performed even if the copy button 51 is operated. Further, the weight lamp 54 is turned on only when copying is possible, and blinks until the fixing device 22 or the like reaches a constant temperature.

Next, when performing normal copying, the copying machine is pulled out to the position A to close the shutter 33 of the exposure port 31 for board copy, and the original table 2a is used to copy a normal document or book. . At this time, the optical path from the blackboard does not affect the image because it is blocked by the shutter 33.

The original on the original table 2a is illuminated by a light source 24 of an optical system for a normal copying machine, and reflected light from the original is imaged on a photoconductor drum 12 by a copying lens 27 through a second copying mirror 26. It

The position detection of the board sheet 3 used in the copying machine having the above-mentioned structure will be described below with reference to FIG.

On the long board sheet 3, the first page mark 55, the second page mark
Page mark 56, 3rd page mark 57, 4th page mark
58 and a fifth page mark 59 are provided.

The page marks 55 to 59 have different numbers of page marks, and each page can be distinguished by the number. The first page end mark 60 is a mark for preventing excessive rewinding when there is a page mark detection error or when the sheet is moved to an abnormal position. Similarly, the fifth page end mark 61 is a mark for preventing excessive winding. Each mark 55-61 is a white board sheet 3
Is printed in black on the bottom edge of.

Each mark is detected by an optical sensor 62 provided at a predetermined position on the board.

For example, when the fifth page mark 59 and the first page end mark 60 are enlarged and shown as shown in FIG. 6B, the length of each of the five page marks 59a to 59e of the fifth page mark 59 is a, The lengths of the marks 59a to 59e are indicated by d, the length of the first page end mark 60 is indicated by c, and the respective lengths are configured so that a <c <d.

The page detection operation when the power is turned on will be described below with reference to the flowchart of FIG.

If the board sheet 3 is normally stopped when the power is turned off last time, the sensor for mark detection (not shown) has a substantially leading end of the page mark. First, when the power is turned on, a predetermined amount is rewound to remove the page mark from the sensor (step 1). The operation at this time is to start timer A, which is an extremely short time, in step 2,
This is performed by driving the rewinding motor, determining the end of the timer A in step 3, and stopping the rewinding motor when the timer A reaches the end (step 4). After that, the process proceeds to step 5 to wind the board sheet 3.

When the board sheet 3 is wound up, the timer B, which is a timer including the time required to move one page of the board sheet 3 and the margin time, is started (step 6) and the process proceeds to step 7 to judge the end of the timer B.

Here, if the timer B is at the end, error processing (step 8) is performed, and if the timer B is not at the end, it is judged whether the leading edge mark of the next page is detected (step 9) and the leading edge mark is detected. If not, the process returns to step 7 and the same judgment is made, and if the tip mark is detected in step 9, the process proceeds to step 10. In other words, no matter what position the board sheet 3 is in when the power is turned on, some mark should be detected if it moves up to one page. However, if the mark is not detected even when the timer B reaches the end, the winding motor It is considered that there is an error such as the non-rotation of the motor or the sensor itself is faulty, and all loads such as the motor are turned off.

In step 10, the timer C, which is a timer added with the time required to move the length d of the five page marks 59a to 59b and a margin time, is started, and 1 is added to the page counter (step 11). Go to 12.
In step 12, a timer having a time required to move the length a of one page mark and a margin time, which is sufficiently shorter than the time required to move the length of the page end mark C. Start D.

After that, it is determined whether the timer D is the end (step 13), if it is the end, error processing (step 14) is performed, and if it is not the end, it is determined whether the mark has ended.
(Step 15) If the mark is not finished, the process returns to step 13, and if the mark is finished, the process proceeds to step 16 to detect the next mark. If the next mark is detected in step 16, the process returns to step 11 and the page counter is incremented again by 1
Repeat steps 11 to ST16. If the next mark is not detected in step 16, the process proceeds to step 17 and the above-mentioned timer C is executed.
If the timer C is not the end, the process returns to step 16, and if the timer C is the end, the winding motor is stopped (step 18). That is, here, the page number is detected depending on how many marks are detected from the start to the end of the timer C. Further, since the timer D ends when the sensor detects the first page end mark 61 and the fifth page end mark 61, error processing is performed at this time. Next, the rewinding motor is driven (step 19), the board sheet 3 is rewound, the timer E in which the same time as the timer C is set is started (step 20), and the end of the timer E is judged (step 21). ), If the timer E is at the end, the rewinding motor is stopped (step 22) and the process proceeds to the next step. Since the timer C and the timer E have the same time and the winding and rewinding speeds are substantially the same, the board sheet stops at the position where the tip of the mark and the sensor substantially match.

Since the page detection is performed by the above flow, it is possible to detect and display the page appearing when the power is turned on in a short time.

Further, even if the power is turned off during the movement of the sheet last time and the power is turned on when the sheet is not in the proper position, the page can be stopped and displayed at the first page that appears after the start of winding. Therefore, even if the user or the like forcibly moves the page, this movement can be detected.

Next, a method of stopping when a sheet is wound for page movement or copying will be described. When the tip of the page mark to be stopped is detected, if the flow is started from the position shown in Fig. 9B, it will stop at the point where the tip of the page mark and the sensor are substantially coincident, and rewind for page movement. If you want to stop the operation, if the page mark is detected during rewinding, rewinding continues for a predetermined time (the time when the page mark completely exceeds the sensor), then start winding and turn on the sensor when the sensor turns on. good.

In the above description, the winding and rewinding speeds are the same, and the explanation was given without taking into consideration overrun due to inertial force, rising speed, etc., but the board sheet 3 of the winding roll 5 or the rewinding roll 6 Changes in speed due to changes in diameter due to increase / decrease in the number of windings, overrun due to inertial force, etc. can be corrected by changing the value of each timer for each page or for each moving condition.

〔The invention's effect〕

As described in detail above, according to the present invention, even if the board sheet is present at a position other than the first page and the power is turned off, it does not move from the page in use, so that the so-called initialization time is short. Since the board seat and the motor drive system are not moved or driven each time, the life can be extended.

Further, according to the present invention, since the same number of page detection marks as the number of pages are provided, the number of page reading errors is reduced, and even if a mistake is made, the next page is normally detected and automatically corrected to normal operation. be able to.

[Brief description of drawings]

1 (a) is a block diagram of a board sheet used in the copying apparatus of the present invention, FIG. 1 (b) is a partially enlarged view of FIG. 1 (a), and FIG. 2 is used in a conventional copying apparatus. FIG. 3 is a block diagram of the copying machine, FIG. 4 is a block diagram of the copying machine, FIG. 5 is a block diagram showing the copying section unit of the present invention, and FIG. 6 is a display section. FIG. 7 is a schematic configuration diagram of the board optical system, FIG. 8 is a configuration diagram of the operation unit, and FIG. 9 is a flowchart diagram. 1 ... Board part, 2 ... Copying part, 2a ... Original platen, 2b ... Loading beam, 3 ... Board sheet 4,4a, 4b, 4c, 4d ... Roll 5 ... Winding roll, 6 ...... Rewinding roll, 7 …… Backup board, 8 …… Fluorescent lamp, 9 …… Board side first mirror, 10 …… Board side second mirror, 11 …… Board side lens, 12 …… Photosensitive drum, 15 …… Exposure, 22 …… Fixing part, 27 …… Copy lens, 28 …… Original glass, 29 …… Tip indicator, 30 …… Original cover, 31 …… Board copy exposure port, 32 …… Copy Exposure port, 33 …… Shutter, 41 ～ 45 …… Instruction button, 46 ～ 50 …… Display lamp, 51 …… Copy button, 55a …… Power switch,

Claims (1)

[Claims] 1. A detecting device for detecting a page mark corresponding to a page on a display member in a copying apparatus for copying an image written on a display member having a length of a plurality of pages, and the detecting means. A display unit for displaying the page detected in step 1, and a control unit for controlling the display member to move in a first direction and a second direction opposite to the first direction,
When the copying apparatus is powered on and the middle of the page is exposed, the control means moves the display member in the first direction for a predetermined time, and then the detection means causes the detection means to move the display member on the display member. It is moved in the second direction until the detection of the page mark is completed, and then moved in the first direction by a distance corresponding to the position where the page mark is detected to expose the nearest page of the display member. A copying machine characterized by the above.