JPS58107551A - Copying device - Google Patents

Abstract

PURPOSE:To decrease greatly the occurrence of copy mistakes due to the misselection of the size of the recording paper, by enabling the resetting at the size of the recording paper of the highest priority via a timer when a certain period elapses after the preceding copy is over. CONSTITUTION:A control circuit 8 of a copying device decides whether the output 5a of a timer 5 is set at t high level, i.e., whether a certain period has passed after a copying process is over. Then it is decided whether the output 3a of an input circuit 3 having the recording size of the highest priority is equal to the output 2a of a cassette detecting circuit 2, i.e., whether the recording paper of a size having the highest priority is set at an upper stage. Then the recording paper of a size having a high priority, i.e., a high using frequency is set automatically when a certain period elapses after the preceding copy is over. In such a way, the probability can be reduced greatly for occurrence of copy mistakes even in case the copy button is pushed without confirming the size of the recording paper.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying apparatus, and more particularly to a copying apparatus equipped with a multi-stage cassette in which recording sheets of a plurality of paper sizes are stored.

2. Description of the Related Art Copying apparatuses have been known that include multi-stage cassettes each containing recording paper of a plurality of paper sizes. Conventionally, in such a copying apparatus, after a certain period of time has elapsed after copying has been completed, the cassette is not reset so that the paper size having the highest priority is placed in use.

For example, in a copying machine equipped with two cassettes for paper sizes A3 and A4, the recording paper size of the previous person who made a copy was A3, and the document size of the next person who came to make a copy was A3.
If the number is 4, the person often presses the copy button without paying attention to the size of the recording paper currently set, resulting in copies being made on paper of a different size.

Here, the reason why the person who came to make a copy of an A4 size original pressed the copy button without paying attention to the size of the paper currently set is that the paper was set on A4 size paper, which is commonly used. This is due to the fact that it is often

The present invention has been developed in view of the above-mentioned circumstances, and is capable of reproducing to the highest priority recording paper size after a certain period of time after copying using one of the sizes of recording paper is completed in a copying machine equipped with a multi-stage cassette. An object of the present invention is to provide a copying apparatus configured to prevent copying errors from occurring when setting is performed.

In order to achieve the above object, the present invention employs a structure provided with a timer that can automatically switch to the set state of the most frequently used recording paper size after a certain period of time has passed after the previous copying was completed.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a block circuit diagram explaining one embodiment of the present invention. In this embodiment, an A4 size cassette is placed in the upper row.
This is an example of a copying machine equipped with a two-stage cassette in which an A3 size cassette is set in the lower stage.

In FIG. 1, reference numeral 1 denotes a cassette selection button detection circuit which detects whether the upper cassette selection button or the lower cassette selection button is pressed.

When the upper cassette selection button is pressed, a low level output appears at the output 1a of the cassette selection button detection circuit 1, and when the lower cassette selection button is pressed, a high level output appears.

Then, when 50 pulses are generated at the input 1b of the cassette selection button detection circuit 1, a signal 7a, which will be described later, is inputted and outputted to the output 1a.

A cassette size detection circuit designated by reference numeral 2 detects the sizes of recording sheets set in the upper and lower stages.

The output 2a of the cassette size detection circuit 2 contains information on the size of the recording paper set in the upper stage (-), and the output 2b contains information on the size of the recording paper set in the lower stage. That is, when the recording paper size of the upper cassette is A4, the output 2a is at a low level, and when the recording paper size of the upper cassette is A3, the output 2a is at a high level. The same applies to the recording paper size.

The circuit indicated by reference numeral 3 is an input circuit for the recording paper size having the highest priority, and inputs information on the recording paper size to be reset to the control circuit 8 after a certain period of time has passed after the completion of copying. The recording paper size with the highest priority is the size with the highest copying frequency.

When the recording paper size with the highest priority is A4, the output 3a becomes a low level, and when the recording paper size with the highest priority is A3, the output 3a becomes a high level.

On the other hand, the one indicated by reference numeral 4 is a copy completion detection circuit whose output 4a is at a low level when copying is in progress, and becomes high level when copying is completed.

Further, when 51 pulses are input from the control circuit 8 to the input 4b, the output 4a becomes low level.

The output 4a of the copy end detection circuit 4 is input to the timer 5. This timer 5 is for measuring after a certain period of time has passed after the completion of copying.
goes from low level to high level. Further, when 52 pulses are generated in the input signal 5b from the control circuit 8, the output 5a becomes low level.

The currently set recording paper size is displayed on the display circuit 6, and when the output 6a from the control circuit 8 is at a low level, A4. If the level is high, A3 is displayed.

Reference numeral 1 denotes a recording paper feeding circuit which supplies recording paper stored in the upper or lower cassette.

That is, when the copy button is pressed, if the person's cuff a is at a low level, the recording paper in the upper cassette is fed, and if it is at a high level, the recording paper in the lower cassette is fed.

In this embodiment (2), since A4 size is set in the upper cassette, the output 2 of the cassette size detection circuit 2
A is at a low level, and since A3 size recording paper is set in the lower cassette, output 2b is at a high level.

The original size of the person who just came to make a copy is A3 1
Considering the case, since the lower cassette selection button is pressed, the output 1a of the cassette selection button detection circuit 1 becomes high level, which is output by the control circuit 8 (two people), and the control circuit 8 outputs a high level signal to the output cuff a. .

Further, the control circuit 8 outputs the signal of the output 2a to the output 2a when the signal 1a is at a low level, that is, when the upper stage force cell (A4) is selected, and when the output 1a is at a high level, that is, when the lower stage force cell is selected. ) (A3) is selected, output 2b is output 6a
(-Output.

In the above example, since the signal 1a is at a high level, the signal 7a is also at a high level, and when the copy button is pressed, the recording paper set in the lower cassette, that is, the A3 size recording paper is fed.

Further, since the A3 size of the lower cassette is selected and the output 2b of the cassette size detection circuit 2 is at a high level, the output 6a is also at a high level and the display circuit 6 displays that A3 size is required.

When the copying is completed, the output 4a of the copying end detection circuit 4 changes from low level to high level, and when this high level state continues until a certain period of time set by the timer 5 has elapsed, the output 5a changes from low level to high level. Become.

On the other hand, when the output 5a from the timer 5 is at a high level, the input circuit 3a of the recording paper size with the highest priority is taken in and outputted to the output 6a. In addition, the control circuit 8 has an output 3
When a is equal to output 2a, that is, when frequently used recording paper is set in the upper row, ratio cuff a is at a low level;
When output 3a and output 2b are equal, that is, when frequently used recording paper is set in the lower stage, output 1a is set to a high level.

In this case, since the output 3a is at a low level, the output 6a is also at a low level, and the display circuit 6 displays A4. or,
Since the output 3a is equal to the output 2a, the output cuff a becomes low level.

After the control circuit 8 sets the recording paper size with the highest priority, it generates 50 pulses in the signal 1b, 51 pulses in the signal 4b, and 52 pulses in the signal 5b. In this state, when the copy button is pressed, the output cuff a is at a low level, so
The A4 size recording paper set in the upper row is fed.

In this way, after a certain period of time has elapsed after the above copying is completed, the recording paper size is reset to the recording paper size with the highest priority.

A specific control state of the control circuit 8 described above is shown in the flowchart of FIG.

That is, in step 10 of FIG. 2, the output 1a of the cassette selection button detection circuit 1 is input to the control circuit, and in step 11 it is output to the output cuff a-. Then, in step 12, it is determined whether the output 1a is at a low level. That is, it is determined whether or not the upper cassette is selected, and if output 1a is low level, output 2a is set to step 1.
3, and if signal 1a is at high level, output 2b is input at step 14, and output 6a is input at step 15.
Output to.

Further, in step 16, it is determined whether the output 5a is at a high level, that is, whether a certain period of time has elapsed since the completion of copying. If a certain period of time has not passed, proceed to step 10.
If a certain period of time has elapsed, output 3a is returned to step 17.
, and output as the signal 6a in step 18.

In step 19, whether output 3a is equal to output 2a,
That is, it is determined whether the recording paper size with the highest priority is set in the upper stage. If it is set to the upper stage, a low level is output to the output 1a in step 201. If it is not likely to be set, a low level is output to the output 1a. It is determined whether or not it is set.

If it is set to the lower stage, a high level is output to the output cuff a through the output 22C:. Output 6a.

After setting 7a, output 1bl = pulse 50° output 4b1; pulse 51. Output 5bl-pulse 52 is generated in step 23, and the process returns to step 10 to repeat the same operation.

In this way, high-priority paper, that is, paper of a frequently used size is automatically set after a certain period of time after the previous copy is completed, so check which size paper is set or not. No I: Even when the copy button is pressed, the probability of miscopying is significantly reduced.

Incidentally, although the above embodiment has been described using only a copying machine equipped with multi-stage cassettes, the present invention can also be applied to a facsimile machine having a copying function. In other words, in a facsimile machine that can set multiple sizes of recording paper, if a person manually switches the recording paper on the receiver side, the facsimile receiver's recording paper size is given the highest priority after transmission or copying is completed. Automatically resets the recording paper, dramatically reducing errors in recording paper selection.

As is clear from the above description, according to the present invention, in a copying machine equipped with a multi-stage cassette in which recording paper of a plurality of sizes can be set, the highest priority High recording paper size I: Since the configuration is such that it can be automatically reset, an excellent effect can be obtained in that the occurrence of copy errors due to paper size selection mistakes can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram illustrating an embodiment of the present invention;
FIG. 2 is a flowchart explaining the operation. 1... Cassette selection button detection circuit 2... Cassette size detection circuit 3... Highest priority recording paper size input circuit 4
... copy end detection circuit 5 ... timer 6 ... display circuit 7 ... recording paper feeding circuit. Figure 1 Figure 2

Claims (1)

[Scope of Claims] In a copying machine equipped with a plurality of cassettes each containing paper of a plurality of different sizes, the recording paper size with the highest priority is selected via a timer after a certain period of time has elapsed since the end of the previous copying. [A copying device characterized by having two configurations so that it can be reset.