JPS59142565A - Control device of copying machine - Google Patents

Abstract

PURPOSE:To execute an image shift without using exclusive parts by detecting an original read start of an exposure lamp, counting a clock by making it as a start point, and starting the carrying of a transfer paper when the counting exceeds the set clock number. CONSTITUTION:An exposure lamp 3 moves in the left and right directions in parallel to a platen 1. When a light of the exposure lamp is detected by an image formation detecting sensor (Regi sensor) 4, a signal of a low level is inputted to a microcomputer 5 through an interface. A machine clock is measured by making this signal a start point, compared with a machine clock number which is set in accordance with a shift quantity of an original image inputted in advance, and when it exceeds the set clock number, a gate 8 is opened, and a transfer paper which is stopped temporarily at the gate in advance is fed to a transfer part. Whether a shift function is adopted or not, and setting of the shift quantity are executed by a tray selecting button and a ten key.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a copying machine, and more particularly to a control device for a copying machine that can bring the effective range of a copy image to any position on a copy sheet.

(Prior Art) In conventional conventional copying machines, when a document is placed on a platen, the position of the document image to be copied onto copy paper is uniquely determined by the position of the document on the platen.

Therefore, if you try to lay out the original image at a desired position on the copy paper in order to create a binding margin on the copy paper, in other words, if you try to perform an image shift, the original placed on the platen will not be moved. Must be,
It was inconvenient to operate. Further, when such an operation is performed, it is not possible to accurately bring the original image to a desired position on the paper, and the work becomes rough.

On the other hand, in special copying machines, is there an image shift function?
However, there is a drawback that button switches, display parts, etc. dedicated to image shifting are provided, and the cost of these parts increases the cost of the device. Furthermore, these components must be provided on the console, resulting in space constraints.

(Objective) An object of the present invention is to eliminate the drawbacks of the above-mentioned conventional techniques and to enable image shifting without using parts dedicated to image shifting.

(Overview) The present invention is characterized by: an image formation detection sensor that detects the start of reading a document in an exposure rung; a means for measuring a machine clock using a signal output from the image formation detection sensor as a starting point; means for comparing the first machine clock number and a second machine clock number set corresponding to the amount of shift of the original image; and a gate for temporarily stopping the copy paper; is the second
The gate is opened when the machine clock number exceeds .

(Example) First, the principle of the present invention will be explained. FIG. 1 is a schematic diagram of a copying machine which does not provide a detailed explanation of the present invention.

A document 2 placed on a platen 1 is read by an exposure lamp 3. The exposure lamp 3 moves parallel to the platen 1 in the left-right direction. 4 is an image formation detection sensor (Regi 5enSor) that detects the start of reading the original 2;
When the light from the exposure lamp 3 is detected by the image formation detection sensor 4, a low level signal as shown in FIG. 2(b) is sent to the microcomputer 5 through an interface (not shown). and then input it.

Then, the microcomputer 5 starts counting the machine clock inputted from the machine clock generator 6 as shown in FIG.

On the other hand, at the same time or before or after the start of copying, the copy paper stored in the paper feed tray 7 is fed out one by one from the paper feed tray 7 by a paper feed roller (not shown), and is temporarily stopped by the gate 8. ing.

Generally, in normal copying, the drum 90 rotational speed and the copy paper transport are adjusted such that the electrostatic latent image of the document 2 created on the drum 9 is transferred to a predetermined position on the copy paper. The gate control means 10 opens the gate 8 in response to a command from the microcomputer 5 at a timing that takes into account the speed, the distance between the gate 8 and the drum 9, and the like.

For example, in Fig. 2, after the image formation detection sensor output shown in Fig. 2(b) rises, the microcontroller 5 outputs a signal for activating the gate control means 10 (see FIG. 5(c)). Note that this gate activation time t is set to a different time depending on the size of the copy paper.

Now, when performing image shift as in the present invention, the following procedure is performed. For example, when you want to move the original image to the left, you can set the timing at which gate 8 opens as shown in Figure 2 (
d), time t, longer time t,
Make it. In this case, the timing at which the copy paper passes through the gate 8 is delayed compared to the normal copying state, so that the time for the copy paper to reach the position where it contacts the drum 9 is delayed. Therefore, the image pattern on the drum 9 is shifted and transferred to the left side of the copy paper.

On the contrary, when it is desired to shift the original image to the right side of the copy paper and make a copy, the activation time of the gate 8 is set to t.
, it is obvious that it would be better to make it shorter.

Next, one embodiment of the present invention will be described. FIG. 3 shows a block diagram of one embodiment of the invention. In the figure, 20 indicates a console provided with a group of input keys, a display, etc. Reference numeral 5 denotes a microcomputer, which includes interfaces 21, 22, a CPU 23, a ROM 24, a RAM 25, a nonvolatile memory 26, and the like. Also, 2
7 is a gate solenoid controlled by gate control means 10. When the gate solenoid 27 is actuated, the gate 8 shown in FIG. 1 opens and the copy paper temporarily stopped by the gate 8 is sent toward the drum 9.

The console 20 includes, for example, as shown in FIG. 4, a numeric keypad 30, a clear key 31, an all clear key 32, a selection button 33 for selecting the upper, middle, and lower paper feed trays, a start key 34, A display means 35 for displaying the copy paper size f: a display means 35 for displaying the size f of the copy paper, and a twentieth indication means 36 for displaying the number of copies designated by the numeric keypad 30, etc. are provided.

The ROM 24 in the microcomputer 5 stores the time measured by the machine clock (1) when the output of the image formation detection sensor 4 is generated in the standard copying state and when the gate solenoid 27 is activated.
In the example shown in Fig. 2, t, ) or 1, 1 is input for each size of copy paper.
Data is stored that indicates whether the J gate solenoid 27 should be activated as much earlier or later than the standard time t1, converted into a machine clock.

Next, the operation of this embodiment will be explained using FIGS. 3, 4, and 5. FIG. 5 shows a flowchart of the microcomputer 5 shown in FIG.

Step S1. B2... First, it is determined whether the start key 34 on the console 20 shown in FIG. 4 and the 00 key of the numeric keypad 30 are pressed at the same time. If both steps are yes, the microcontroller enters self-diagnosis mode (
DIAG mode) and proceed to step S3. on the other hand,
The self-diagnosis mode cannot be entered unless the key 34 and the 0 key are pressed at the same time.

Step S3: It is determined whether the upper tray selection button has been pressed. When the upper button is pressed, the image shift function is entered.

Steps 84 and 85... It is determined whether the shift direction input from the numeric keypad 30 on the console 20 is a rightward shift or a leftward shift. The data in this shift direction can be stored in the nonvolatile memory 26.

Steps 86, 87, 88... It is determined which of the upper, middle, and lower buttons of the paper feed tray selection button 33 was pressed, and the selected paper size is A4. It is determined whether it is B4 or B5.

Step S9...The shift amount inputted using the numeric keypad 30 is taken in. The shift amount is measured by the machine clock time α based on a table stored in the ROM 24 that associates the shift amount with the machine clock time. and stores the α in the nonvolatile memory 26. In addition,
A table corresponding to the paper size is stored in the ROM 24, associating the shift amount with the machine clock time. .

Step S10: Determine whether the power switch is turned off. When the power switch is turned off, the self-diagnosis mode is canceled and the copy mode is entered.

Step 811: It is determined whether the image formation detection sensor output has been input. If the answer is YES, proceed to the next step 812.1゜Step 812...Starting from the time when the image formation detection sensor output is manually input, the number of input machine clocks is counted, and the counted value is the standard copying value. When the output of the image formation detection sensor 4 is generated in the state and the gate solenoid 27
It is determined whether or not the value obtained by subtracting the time α corresponding to the rightward shift amount from the time 1K until startup has been exceeded.

Step S13...If the answer is YES in step 812, a signal to turn on the gate control means 10 is sent from the microcomputer 5. This opens the gate 8 and sends the copy paper to the photosensitive drum 9.

In the above manner, copy paper of the selected size is printed.
A copy is obtained in which the original image is shifted to the right by a desired amount.

On the other hand, when shifting the original image to the left, step S5 and steps 86' to S13' similar to those described above are processed. Note that steps 86' to 813' are different from steps S6 to 813 in step sJ2'.
The only difference is that (t, 10 α), and other than this, the two are the same. 2 Therefore, each step S6' to 813
'Detailed explanation is omitted.

(Effects) As described above, according to the present invention, by using the numeric keypad used for setting the number of copies, etc., and the number of copies per copy display device, which are installed in ordinary copying machines, all the paper sheets that can be selected can be printed. The effective range of the copy image can be set at any position for each size of paper. In addition, as mentioned above, image shifting can be done software-wise using existing parts without using special parts for image shifting.
The number of parts provided on the console is small, which has the effect of being inexpensive and making it possible to reduce the area of the console.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an embodiment of the present invention, Fig. 2 is a time chart of signals of the main parts of Fig. 1, Fig. 3 is a block diagram of the main parts of an embodiment of the invention, Fig. 4 1 is a plan view of one specific example of the console; FIG. 5 is a flowchart for explaining the operation of FIG. 3. .

Claims (1)

[Claims] (1) An image formation detection sensor that detects the start of reading an exposure rung document, a means for measuring a machine clock using the signal output from the image formation detection sensor as a starting point, and a first machine clock number measured by the means. and a second machine clock number set corresponding to the amount of shift of the original image, and a gate for temporarily stopping the copy paper, and the first machine clock number is equal to the second machine clock number. A control device for a copying machine, characterized in that the gate is opened when the clock number is exceeded.