JPS59198075A - Original scanning device - Google Patents

Abstract

PURPOSE:To attain copying at a time without replacement of originals by placing plural originals on an original placing plate while arranging them. CONSTITUTION:The original placing plate 4 is reciprocated in left and right directions in a prescribed speed. The light irradiated from an original exposure lamp 1 is reflected on an original face and irradiated to a photosensitive drum 3 via lens array 2. A developing machine 5 visualizes an electrostatic latent image on the drum 3 and transfers the image to a sheet of transfer paper P. Originals 12-1-12-4 are arranged and placed on an original mounting glass 4' in the order of the original placing plate 4 scanned through movement. Since the plural originals are arranged and placed in this way, the originals are copied by one original placing without replacing originals.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a document scanning device for copying machines, image files, and the like.

BACKGROUND OF THE INVENTION Conventionally, document scanning in a slit exposure type copying machine is generally divided into the following six methods. Namely, there is a moving original type in which the optical system consisting of an exposure rung* Mi7-y lens is fixed and a document is placed thereon, a moving optical system type in which the original table is fixed and the optical system is moved, and
This is a sheet document moving type that moves a sheet document on a fixed optical system. Among these scanning methods, the scanning methods other than the sheet original moving type require the effort of reloading the originals each time they are scanned when there are multiple originals, which is especially troublesome for the operator when scanning thick book-like originals. It becomes work.

Also, when obtaining multiple copies from multiple manuscripts,
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide a document scanning device suitable for scanning a plurality of documents.

Example Hereinafter, the present invention will be explained in more detail using the drawings.

In this description, the present invention will be exemplified in the case where the present invention is applied to the above-mentioned document table movable type, but it is similarly applicable to the optical system movable type.

FIG. 1 is a diagram showing the internal configuration of a copying machine to which the present invention is applied.

The document table 4 is reciprocated left and right at a predetermined speed by a drive source (not shown), but the document image placed at a predetermined position is scanned only when it moves in the direction of the arrow.

An electrostatic image (a) is formed on the photosensitive drum 6 based on the scanned image from the original on the original platen 4, but this is caused by light emitted from the original exposure lamp 1, which is reflected by the original surface, and is reflected by the lens array 2. The details of the formation process of the electrostatic latent image on the photosensitive drum B will be omitted here. The powder image on the photosensitive drum 6 is transferred to the transfer paper P fed from the cassette 8 at a specified timing.The transfer paper P is fed every 91 sheets by one rotation of the paper feed row 27. , the powder image is aligned (registered) with the powder image on the g-light drum 6 by the register roller 6, and is further conveyed.

After the transfer process, the transfer paper P is led to the fixing roller 10 by the conveyance section 9, and after the image is fixed thereon, it is discharged to the paper discharge tray 11.

FIG. 2 is a top view of the original platen 4, showing four originals 12-1 to 12-4 placed on the transparent original platen glass 4'. The originals 12-1 to 12-4 are placed side by side in the order in which they are scanned by the movement of the original table 4. Lever 15', 16',
17' is for setting the positions of the sensors 15, 16, and 17, and the sensors 15, 16 and 17 are attached to a part of the document table 4 on the reed to detect the reversal of the document table 40 and the image registration position. When the magnet approaches the sensor, the sensor output signal is inverted from 0'' to 1''. Each sensor is preferably a Hall IC that responds to a magnet. These sensors 15, 16, 17 are located at the lever 15'.

It can be adjusted by sliding 16' and 17', and can be moved up to the elongated hole 5 as shown in the figure on page 1. The copy key 20 is a key for starting a copying operation.

The push button switch 21 is a mode key for selecting the scanning mode, and by pressing the mode key 21, the normal document scanning mode, which is set to cyclic mode, is selected.
5. Switches to a program υ that executes document scanning without depending on the signal of 17. In the normal document scanning mode, depending on the size of the transfer paper P stored in the cassette 8,
The inversion position of the sequence is automatically set to perform nine single image scanning sequences. On the other hand, mode key 2
When the screen is opened by pressing 1 again, the program executes the continuous scanning mode, which will be explained later.

In FIG. 6 (5), the position of the document table 4 and the position of the document table 4 are detected.
6, 17, and 18 are shown.

The sensor 16 detects the image scanning start position, the sensor 14 detects the registration timing of the transfer paper P for the first original of which multiple sheets are placed, and the sensor 15 and 17 at 16° detect the registration timing of the second and subsequent sheets 71@' The sensor 1B detects the registration timing of the transfer paper PA and the inverted position of the document platen 40, and the sensor 1B detects the inverted position of the last document scan.
Incidentally, the sensors 13 and 14 are used in the same manner when executing the normal scanning mode described above. The document table 4 is driven by the same drive system as the photosensitive drum 6. The state of image scanning in the continuous scanning mode is shown in FIG. 6(B) corresponding to the sensor positions in the third section. This shows the movement of the document table as it repeatedly reverses and advances while scanning the second and subsequent document images.

Also) Figure 6 (q is reproduced in continuous scanning mode,
The weight order of the transfer paper P discharged outside the machine is shown. If you arrange the documents on the tab and document table 4 in the desired scanning order,
Naturally, the transfer papers P are stacked in that order from the bottom with the image side facing up (.

FIG. 4 shows a circuit diagram that controls the image sequence.

16 to 18 represent the respective sensors shown in the sixth figure, and 20 and 21 represent the copy key and mode key shown in the second figure, respectively. l
10-1 is an input interface that converts signals from the keyboard and keys into input signals to the one-chip microcomputer μmC0M.

In addition, l10-2 is an output interface, μmC0M
It converts the output signal from the converter into a drive signal for each required load. As loads, SIR drives the motor M for driving the photosensitive drum, HVT drives the high voltage transformer of the charger, LR drives the exposure rung, and SLI, 2 drives the paper feed row 27 and registration row 26, respectively. Solenoid drive of C1
1 and C12 act as clutch drives for moving the document table forward and backward, respectively.

The fifth factor is a timing chart showing the original image scanning sequence. Further, FIG. 6 is a flowchart showing a program for a document image scanning sequence, and this program is stored in advance in the memory ROM of μmC0M.

? In the flowchart of FIG. 6, SC is a mode switching signal from the mode key 21. In addition, H, P are document plate scan start position signals from the sensor 16, 1(, GO are registration signals from the sensor 14, 1llLJ, 2, 3, .
Reference numeral 4 indicates the inversion position and registration signal of the document table 40, which are output from the sensors 15, 16, 17, and 18, respectively. In addition, in the time chart of Fig. 5, FWD is forward clutch C.
L1 is a drive signal, RVS is a drive signal for reverse clutch CL2, PFS is a paper feed signal, and RQS is a registration signal.

Additionally, as shown in Figure 6, Timer 1 is RGi.

This is a timer program that operates only when each signal of 2.6 is output, and starts counting at the first signal of RG1 and 2.3.

The time Tl during this time is set to be shorter than any time it takes for the document table 4 to reach the adjacent paper sensor.

Timer 2 is a timer program that counts from the time when the document table 4 returns to the document table scanning start position, and when the time T from which the document table is stopped has elapsed, the driving of each load is cut off and stopped.

In step S1, when the copy key 20 is pressed,
The selected scanning mode is determined in step S2. If the mode key 21 is open and the mode switching signal SC is "1", it is determined that the continuous scanning mode is selected, and the process proceeds to step S4. On the other hand, if the mode switching signal SC is "0", it is determined that the normal scanning mode is selected, and the process proceeds to step S3, where a copying operation using the normal scanning mode is executed.

If the continuous scanning mode has been selected, in step S4, the motor M, high pressure source HVT, exposure 2 pump LT, and solenoid 8L2 are activated, and the process proceeds to step S5. In step S5, the scan start position of the document table 4 is detected, and if it is not at that position, the reverse clutch CL2 is activated in step S6, and the scan start position detection is continued. When the document table 4 is at the predetermined position, in step S7, the forward clutch sh1 is activated to advance the document table 4 from the scanning start position, and the transfer paper P is fed (the solenoid sh1 is operated).

In step S8, the sensor 14 detects the registration of the original platen 4, and the image and the transfer paper are aligned. In step S9, the solenoid SL2 is turned on, the registration roller 6 is operated, the transfer paper P is advanced to the transfer position, and the transfer process is performed.

Furthermore, in step 810, when the document table 4 moves forward and the sensor 15 outputs the signal 1-tG1, in step 814, the forward clutch CL1 is turned off, and the reverse clutches CI and 2 are turned on, and the document table 4 changes from forward to reverse. Switch. Next, in step 815, the time St of time Tl by Timer 1 is started, and when the end of the time measurement is determined in step s46, the document table 4 is switched from reverse to forward again in step 817, and the second sheet is Document scanning begins. At this time, solenoid S
L1 is turned on and the second sheet feeding operation is performed. Note that the register roller 6 is stopped during paper feeding.

Next, in step 818, when the sensor 15 detects the registration of the second original, the image on the photosensitive drum 6 and the transfer paper are aligned in step 821, and the registration rollers are aligned. 6 rotates and the same operation as described above is performed.

Third. The above operation is repeated for the fourth document 12-4, but the fourth image scan is completed, that is, the signal RG4 from the sensor 18 is output at step 813.
When G is detected in the reverse clutch CL in step S22,
.

At this time, after the last transfer paper P is ejected to the outside of the machine, the time TII of Timer 2, which started timing in step 825, is
If it is determined in step 826 that the time measurement has ended, each part stops in step 827, and the copying operation ends.

In addition, if multiple copies of each original (13) are required, set the number of copies on the operation panel or use continuous scanning mode to copy the first to fourth originals. If the transfer sheets are piled up on the paper discharge tray Y-11 in an orderly manner, the operator is not at ease with page alignment.

Note that scanning was performed on an original smaller than the transfer paper P.
The location can be changed by moving the sensors 15, 16, and 17 left and right using the levers 15', 16', and 17' to invert them and adjust the registration position.

In this embodiment, it is assumed that four originals are loaded at the same time.
By providing a changeover switch or the like to disable the output of 16 and 17, the intended operation can be easily realized.

Conversely, for a large number of originals of five or more sheets, this can be realized by making the original table longer, increasing the number of sensors, and executing the appropriate similar sequence.

In addition, it can be used not only for sheet originals (but also for copying images of both pages of a book original onto separate transfer sheets).

Furthermore, when copying both pages of a double-sided book onto the front and back sides of a single sheet of transfer paper as an application to double-sided copying, the first scan is completed, the paper is reversed, and the next scan begins, and the back side of the transfer paper is If the next scan is started after waiting for the document to arrive, double-sided copying can be completed with a single document placement operation.

Further, in addition to scanning documents in copying machines, the present invention is also applicable to facsimile machines and scanning devices that photoelectrically read images such as image files.

Also, for each of the multiple originals set on the original table,
It is likewise possible to perform a different number of scans.

Effects As explained above, according to the present invention, it is possible to scan a plurality of originals by placing the originals at once without the need to replace the originals.

In addition, when obtaining multiple copies from multiple manuscripts, etc.
It is possible to eliminate the need for page alignment of copies.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the internal configuration of a copying machine to which the present invention is applied;
Figure 2 is a view of the manuscript table viewed from above, the third section is a layout diagram of the sensor that detects the position of the manuscript table, Figure 6 (B) is a diagram showing the image scanning state, Figure 6 (q is 4 is a diagram showing an example of a control circuit, FIG. 5 is a timing chart showing control timing, and FIG. 6 is a flowchart showing a control program. is a photosensitive drum, 4 is a manuscript table, P is a transfer paper, 15', 16'
, 17' is a lever, 13 to 18 are sensors, and 21 is a mode key. No. 1 mouth

Claims (1)

[Claims] A document scanning device characterized in that it sequentially scans a plurality of documents placed on a document placement table, and is capable of scanning further documents.