JPS5868073A - Copying device - Google Patents

Abstract

PURPOSE:To reduce the number of data to be transferred, by outputting a data for controlling a scanning distance of a scanning means by a microcomputer, and also making a scanning distance in case of variable magnification correspond to that in case of unmagnification. CONSTITUTION:To a control microcomputer mu1, a copy key signal, a ten key signal, a cassette size signal from a variable magnification command signal 26, etc. are inputted, control signals of copy start, a scanning distance, various displays, etc. are outputted, and a scanning distance controlling data, a repeat controlling data, a stopping data, etc. are sent and received between said microcomputer and a sequence microcomputer mu2. Connecting lines (a), (b) between both the computers are used for sending a scanning data, a variable magnification factor data, etc. are sent by other lines (c), (d), and 4 bits are outputted in parallel as a whole. Also, desired magnification consists of 3 ways such as unmagnification, M1 and M2 so that the scanning distance is limited to 3 ways, and number of data to be transferred is reduced.

Description

[Detailed description of the invention] The present invention relates to a copying apparatus capable of variable magnification.

Conventionally, variable-magnification copying machines change the speed of the scanning system and the position of the optical system to make copies at the same magnification or variable magnification. The fixed distance of the scanning system was changed according to the required scanning length. In that case, a switch such as a microswitch was arranged on the scanning path, one of them was selected depending on the magnification and copy size, and when it was turned on in the scanning system, the scanning system started returning. . Also, one copy must be formed within the size of the copy sheet (depending on the sheet size, the switch was selected to perform the scanning system).

However, as the types of magnifications and sheet sizes increase, a large number of switches must be placed at each scanning screen (h-F).
When inputting and outputting data for octopus 1, there arises the inconvenience that most of the boxed data lines are used for this purpose.

The present invention eliminates the above drawbacks.

FIG. 1 is a schematic cross-sectional view of a cage copying machine to which the present invention can be applied, in which 1 is a housing, 2 platens are loaded with documents, and 4.5 is a platen 6 which is used to scan and reciprocate. A pulley to be moved, 19 a clutch, 10, which transmits rigid force of the 1-ri 5 to a synchronized motor 20 synchronized with the speed of the seat drum 13.
．． 12 is a reflection mirror, 11 is a lens system that moves in the direction of the arrow according to the desired magnification, 8 is an exposure ring, and 26 is a microswitch installed on the platen stand that is activated by the insect 1 to stop the platen) (P, 24 is a microswitch lt that drives the timing roller 16 by the same cam 22.
F'.

A roller 25 picks up a sheet from the cassette 27 and feeds the sheet. The clutch 19 has a gear that changes the transmission speed depending on the desired multiplication factor.

Numeral 14 is a hole disk coaxial with the drum, and the hole is detected by a photo ink club 15 to generate a serial pulse.

By turning on the copy button (not shown), the drum 16 is rotated forward for a certain amount of time (a little (at least one revolution)), and then the lamp 8 is turned on to start the platen +++3. The drum is exposed to the original light and is transferred to the sheet 17, which is exposed by the developing device 29 and fed at the A timing.During the movement of the platen 3, the switch 24 is turned on to drive the timing roller 16.
/9r5 at position, start reverse movement, and switch 26
Turn on to stop. In the case of repeated copying by inputting with a numeric keypad, etc., the process starts again. The switch 26 for detecting the size of the cassette 27 is configured to detect seven sizes shown in FIG.

The end of the above scan is as shown in Fig. 2 (A4, B4).

There are six rules corresponding to A6 size.

Here's ``2nd movement 1b1'' 1 in Figure 6, times 1+! i'T
In the figure, the cassette size signal and other signals from No. 41 and above are input, the pulse from the copy button 15, the signals from switches 23 and 24, and others are input, and the platen clutch 19. Ramp 81 Roller clutch 18. This is a sequence microcomputer that sequentially drives the main (drum) motor and other parts, and all of them are based on a known one-chip microcomputer, such as μcoM.
Use 432y ♀] Now.

Furthermore, data for distance meter control 1, (return control data, stock data, jam data, etc.) are sent and received between the microcomputers μm and μ2.

The program stored in .mu.2 is as schematically shown in the flowchart of the 41st percentile. FIG. 5 is a detailed explanation of the scan distance determination S13 scan step (6) of FIG. 4. μl has a cassette size signal and a variable magnification key signal of 14
A program shown in FIG. 6 for outputting scan h'H gap F data at J%L is stored.

Ki is connected to the output port of μl and the input port of μ2 in Figure 2.
Lines a and b are for sending scanning data, and are configured to output in 2-bit IJ format. Of course, by sending the variable magnification data etc. on other lines c and d, the total number of
The bits are output in parallel.

These a and b are each 1. O indicates A6 size I, O+1 indicates B4, and 1.1 indicates A4. Note that at 0°O (indicates the Covey Stong command for repeated continuous copy completion Mi+), the scanning distance is thus limited to six ways.If the data is reduced only to the a line, it is limited to two ways.

On the other hand, as shown in FIG. By allocating the above data, the number of transfers was reduced.

That is, the accumulator ice in the management microcomputer μl
Setting 1 in (register) scans A, setting 2 causes B 4, setting 3 causes A4 to correspond to A1, and outputs the data to lines a and b. ice is set to 1, and it is determined whether the size signal from the cassette switch 26 is A3. For A6, there is no longer scanning distance, so lines a and b are unconditionally set to 1.0. If not, determine whether the B4 size is selected, and if so, determine whether the comb key M or Mu is turned on.
If it is turned on, set the A data to Acc. Key M1. If M2 is not turned on, that is, if the same size key is turned on, add +1 to Acc and set it to 2, that is, B4.
Set the scan signal. When the cassette is not B4, it is determined whether it is A41t or not, and if so, it is output b2 to indicate whether the Ml reduction key is on, and if it is on, the A6 output is set. If it is not Ml, determine whether it is Mz or not, and if it is Ms, B
4 Set the appearance.

If it is neither Ml nor MS, 134 is output.

Note that A4B is an A4 cassette whose orientation is reversed both vertically and horizontally. A4) If it is not A4, set A, cc is 10) Set 34-i output, if it is not A4, check whether it is B5 or not. Set B4. 1351Q instead of B5
134 is output when the B5 direction is reversed cassette).

The data of the a and b lines according to the above Acc are read in routine S13 of the sequence microcomputer μ2.

In FIG. 4, when the copy key is turned on, the main paper roller 25 is driven and the platen starts moving forward.

Set the number of pulses to be counted using SB scan. That is, the variable magnification data from the C line is first added, and the number of pulses is nA for A3 and nA for B4, 7t for A4, and 8 for B4, depending on the data on the a and b lines.
is set in the memory in μl.

When variable magnification Ml, i#+(B 4 ), B2(A4)
, ns(A-ro) is set.

When the pulse count reaches the number of valley pulses corresponding to the magnification, the switch 19 is turned off, the platen is stopped, and reversal is started. When it returns to the stop position (switch 26), it repeats the copy process, starts moving the platen forward again, and repeats the same scanning control as described in Section 2.

[Brief explanation of the drawing]

Fig. 1 is a side view of the copying method to which the present invention can be applied, Fig. 2 is a diagram showing inversion of grating ·figure,
FIG. 7 is an inverted explanatory diagram, where μl and μl are a microcomputer, 3 is a platen, and 13 is a drum. Applicant Canon Co., Ltd.

Claims (1)

[Claims] In the Matsushaiso, which is capable of variable magnification and has an original height scanning means, the data for controlling the scanning distance of the set meal means is output by a microcomputer, and the set meal distance at the same magnification corresponds to that when the magnification is changed. A copying device characterized by: