JPS5971062A - Controlling method of copying machine - Google Patents

Abstract

PURPOSE:To recognize the size of an original in an early stage in a copying machine which determines automatically a magnification from the size of the original and the size of copying paper by detecting the width of the original delivered from an automatic original feeder. CONSTITUTION:A means for detecting the width of an original is provided in the conveyance path for the original from an automatic original feeder to an exposing region to discriminate the size of the original. An adequate magnification is calculated from the value obtd. with said means and the size of copying paper and a variable power optical system is displaced. Said means detects the length of the original during coveyance of the original and when it discriminates that the previous judgement on the size of the original is wrong because the original is set in the wrong length and breadth in the automatic original feeder, said means emits an alarm. The variable optical system is designed to be capable of correcting the magnification to the smaller rate so that the copying over the entire part is accomplished even if there is a margin in the copy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling a copying machine that changes the size of a document according to the copy paper size and copies it.

Conventionally, copying machines have been known to be equipped with a multi-stage variable magnification mechanism and an automatic document feeder, which determine the variable magnification based on the original size and copy paper size, and can copy originals of different sizes onto the same size copy paper. ing.

However, in conventional copying machines, the IM document is sent from the automatic document feeder to the copying machine, and after it has been set, the multi-stage variable magnification mechanism is driven and controlled to set the variable magnification ratio. There were problems with long waiting times and reduced copying efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate this problem and provide a copying machine control method with high work efficiency.

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

FIG. 1 shows a block diagram of a copying machine according to an embodiment of the present invention, in which 1 is an operation display device for setting and inputting the operation mode of the copying machine and various displays, and 2 is a document width detector. be. The output data from these operation display device 1, document width detector 2, etc. is sent to the CPU which executes the control procedure described later.
It is added to the main controller 3 of the configuration. Further, the main control device 3 controls the variable magnification mechanism 4, automatic document feeder 9 device 5, sorter 6, etc.

The document width detector 2 includes four sensors 2a to 2d provided in the automatic document feeder 5, as shown in FIG. 2, for example. These sensors 2a to 2d are A3. B4
．． They are arranged at positions corresponding to the widths of A4 and B5 sizes.

There are two types of automatic document feeder 5: one that feeds originals one by one (5ADF) and one that sets multiple originals at once and feeds them one after another (ADF). In the case of 5AFD, the original width detector 2 can be placed on the document feed tray. A
In the case of DF, documents of various sizes are set all at once on the paper feed table, so it cannot be detected here, but when the document is separated at the start of document feeding or prior to document feeding to prevent multiple sheet feeding, The document width detector 2 may be arranged so that the size can be detected.

The variable magnification mechanism 4 consists of a lens mirror mechanism in which a contact on which a document is set moves on the optical axis of the last and transfer drum, and a mechanism that positions this lens/mirror mechanism on the optical axis according to the magnification. It is constructed by a conventionally known mechanism.

3 to 9 are flowcharts of the processes executed by the main controller 3. In FIG. This is a routine to determine whether or not. 13 in FIG. 4 is an interrupt copy routine, 14 in FIG. 5 is a scaling processing routine, and 15 in FIG. 6 is a control routine for part of the sorter.

Further, 16 in FIG. 7 is a routine for determining whether copying is possible, 17 is a routine for determining whether the print button has been pressed, and 18 is a routine for resetting the operation mode to the initial mode.

In addition, 19 in FIG. 8 is a print routine, and 20 in FIG.
21 is a routine for controlling the automatic document feeder 5tl, and 21 is a copy end processing routine.

It should be noted that the above routines, except for the unified mode processing to be described later, are the same as those in conventional copying machines and are very commonly performed, so the details thereof will be omitted.

With the above configuration, when the main switch of the copying machine is turned on, the main controller 3 starts processing, and the print switch turns green in routine 16 and copying is possible, the user presses the print button. The processing of the main controller 3 branches from routine 17 to routine 19 and proceeds to routine 20, where the automatic document feeder 5 is driven. As a result, document feeding is started.

At this time, the length and breadth of the set document and the length and breadth of the copy paper become a problem. That is, as shown in FIG. 10 (,), if the paper feeding directions of the original and the copy paper match, the copy of the original will fit in the copy paper even if it is enlarged or reduced. However, as shown in FIG. 6(b), if the directions do not match, a margin will be created and the image will be smaller than the one described above.

In order to avoid such problems, in this embodiment, in the unified copy mode, that is, in the mode in which originals of different sizes are copied onto copy paper of the same size, the operation display device 1 and the automatic document feeder 9 device 5 are configured to User errors are reduced by displaying a message that says, for example, ``Please set the original vertically'' in accordance with the copy paper feeding direction.

Now, when the above-mentioned document feeding is started, the document width detector 2 provided in the automatic document feeder 9 device 5 detects the width of the document to be fed. That is, the original width is as shown in Table 1 below.
It is detected by the combination of ON and OFF of 2d to a. Furthermore, since the direction of the document width is determined as described above, it immediately represents the document size.

On the other hand, the copy paper size is determined by attaching a code to the cassette and detecting the code. Therefore, the magnification ratio can be determined based on the paper size and original size.

The main controller 3 calculates this magnification ratio in advance and retrieves it from a stored table in the memory, and drives and controls the magnification change mechanism 4.

This scaling factor setting control is executed a after the original size is detected by the original width detector 2. Therefore, while the automatic document feeder 5 feeds and sets the original on the contact glass of the copying machine, the variable magnification mechanism 4 is simultaneously controlled to drive, and the setting of the variable magnification is completed at the same time as the document is set. . This eliminates copy waiting time and greatly reduces copying time.

By the way, in the embodiment described above, when setting a document on the automatic document feeder 5 as described above, it is necessary to set the document in the correct direction.

However, it is not possible to eliminate all set errors.

Therefore, in consideration of such a case where a document setting error occurs, in this embodiment, the length of the document is also detected, and the document size is also accurately detected. That is, in the document width detector 2 shown in FIG. 2, the sensor 2d is always in the ON state while the document is passing through the document width detector 2, as shown in Table 1 above. Therefore, when the document is fed, the width of the document is detected by the document width detector 2, and at the same time, the length of the document is detected from the ON time of the sensor 2d, thereby determining the exact size of the document.

With this, if the original size initially determined from the original width is incorrect due to a mistake in setting the original, copying will be prohibited, and the setting error will be displayed to prompt the user to reload the original. If so, copy mistakes can be completely prevented.

Furthermore, the routine 22 shown in FIG.
1, and have the main controller 3 execute this routine 22 from the branching point 20 of routine 20 to routine 19 consecutively, even if there is a mistake in setting the original, all correct original sizes will be detected and the magnification will be adjusted. By correcting this, it becomes possible to copy the entire document onto the copy paper even if there is a margin on the copy paper.

For example, when copying an A4 original onto B5 copy paper as shown in Figure 10, if you misplace it in the opposite direction as shown in (b) when it should be set in the same figure (,), then when the original is fed, The main controller 3 determines that the document is A5 size based on the detected value of the document width detector 2, controls the drive of the variable magnification mechanism 4''f, and sets the variable magnification from A5 to B5. If copying is performed at the same magnification, half of the A4 original will be missing.However, as mentioned above, by detecting the original length with the original width detector 2, the main controller 3 I found out that it was misset on A4.

As a result, the main controller 3
In order to copy the entire original onto B5 copy paper, I adjusted the magnification ratio set earlier from A4 to B6.
Copy Kaneishi now. As a result, as shown in Fig. 10(b), the misset A4 original is reduced from A4 to B6 in its entirety, without any information being lost, even though half the margins are left blank, resulting in a B5 size. A copy of the entire original can now be obtained on copy paper.

FIG. 12 shows an example of the first part of the operation display device.
The above-mentioned unified mode is obtained by using the illustrated unified mode key 1ak. At this time, the lamp 1b indicating that copying is in progress is lit. Further, the direction in which the original is set is displayed on the display IC based on the direction in which the copy paper is set. Furthermore,
The magnification and document size determined by document width detection are displayed on the displays 1d and le, respectively.On the other hand, if you do not use the unified mode, press the enlarge keys 1f,
By operating the reduction key 1gs and the same size key 1h, the display 1eKP displays the corresponding document size based on the selected magnification and paper size. At this time, the magnification is enlarged and reduced each time the enlargement key if and reduction key 1gt are pressed, and the same magnification key 1 is pressed.
The image is set to 9 equal magnification by h and displayed on the display ld.

In addition, in the above-mentioned unified mode, if no copying is performed for a certain period of time when that mode is used, routine 1 in FIG.
It is automatically cleared as shown in 8.

In this case, depending on the user, it may be possible to mainly use the unified mode, so use the DIP switch to
The set mode at the time of initial auto clear may be made variable.

In addition, in interrupt mode, as shown in routine 13 in Figure 4, if the interrupt key is pressed during or during copying, data indicating whether the unified mode is selected at that time is also temporarily saved. Then, when the interrupt is canceled, the data related to this unified mode is also restored.

As described above, according to the present invention, the variable magnification mechanism is driven and controlled to set the magnification at the same time as the automatic document feeder operates, so that copying efficiency can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main parts of a copying machine according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of the document width detector shown in FIG. 1, and FIGS. 3 to 9 illustrate the operation of FIG. 1. 10(,) and 10(b) are flowcharts for explaining the copying state caused by the difference in paper feeding direction between the original and copy paper, and FIG. 11 is an operation flowchart added to FIG. 1. The figure is the first
It is an explanatory view of the operation display device of the figure. 1...Operation display device, 1a...Uniform mode key, 1
b... Lamp, IC-1e... Display, If...
Enlarge key, 1g...Reduce key, 1h...Same size key,
2... Document width detector, 2a to 2d... Sensor, 3.
...Main control device, 4...Magnification variable mechanism, 5...Auto document feeder, 6...Sorter. Figure 7 Figure 3 Figure 4 Figure 5 1 0 1 L J Figure 70 (a) (b) R version (A4) Saika copy paper (85) Figure 71

Claims (1)

[Claims] (1) By sending and setting the original from the automatic document feeder to the copying machine, and calculating the variable magnification ratio from the size of the original and copy paper size, and driving and controlling the variable magnification mechanism based on the variable magnification, In a method for controlling a copying machine that obtains copies of a predetermined copy paper size regardless of the original size, the automatic document feeder is provided with a document width detector to detect the document width at the start of document feeding, and detect the document width. A method for controlling a copying machine, characterized in that the magnification ratio is determined by determining the document size from the original size, and the drive control of the magnification ratio mechanism is performed at the same time as the document is fed. The magnification ratio mechanism detects the document length by monitoring the document feeding using the document width detector, and determines the correct document size from this and the document width. A method for controlling a copying machine, characterized in that it performs corrective drive control.