JPS59104670A - Preventing system from setting number of copies for reproduction in copying machine - Google Patents

Abstract

PURPOSE:To prevent setting of a copying sheet number during the detection of an abnormal state by detecting an abnormal state of a copying operation, and inhibiting the setting of a copying sheet number until its release is executed. CONSTITUTION:When an abnormal state of a copying operation such as a jam of copying paper, etc. is generated when copying is executed continuously, and it is detected by an abnormal state detecting circuit 1, an output signal of the abnormal state detecting circuit 1 is varied to ''0'' from ''1'', and the gate of an AND circuit 3 is closed, therefore, in this case, even if a ten key 2 is depressed, its signal is not supplied to a copying sheet number display controlling circuit 4. Accordingly, even if the ten key 2 is depressed by mistake in case when the abnormal state detecting circuit 1 detects the abnormal state, contents of a down-counter are not changed, and a copying sheet number display 5 displays the remaining copying sheet number. As a result, setting of the copying sheet number can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for preventing the setting of the number of copies in a copying machine capable of continuous copying, which prohibits the setting of the number of copies when the copying operation is in an abnormal state.

[Technical background of the invention and its problems]

In general, various copying machines have been developed and put into practical use, each having a copy number setting means for setting the number of copies and an abnormal state detection means for detecting an abnormal state during continuous copying based on the set number of copies. However, in this type of copying machine, even when an abnormal condition is detected, the number of copies can be set using the copy number setting means, such as the numeric keypad, so if the numeric keypad is pressed by mistake during abnormality processing, the number of copies will be set or changed. It will be done. Unfortunately, even after the error has been resolved and the state is ready for copying, the operator does not know how many copies are left to make, and the operator has to re-count how many copies have been made up to that point. It was very inconvenient.

[Purpose of the invention]

This invention has been made in view of the above circumstances, and its purpose is to provide a copying machine capable of continuous copying, when an abnormal state is detected, until the abnormal state is cleared.
An object of the present invention is to provide a method for preventing the number of copies set in a copying machine, which can prevent setting of the number of copies during detection of an abnormal state by prohibiting setting of the number of copies by a copy number setting means.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention detects an abnormal state in a copying operation and prohibits setting of the number of copies until the abnormal state is cleared.

[Embodiments of the invention]

The present invention will be described below based on an illustrated embodiment.

In the drawing, l is an abnormal state detection circuit l, which is a circuit that detects an abnormal state of the copying machine, such as a copy paper jam on the conveyance path or in the fixing device, and outputs a signal in accordance with this detection. . That is, for example, normally a logic 11" signal is output, and when an abnormal condition is detected, a logic "0" signal is output. On the other hand, 2 is a copy number setting means such as a numeric keypad; The output signal of this ten Φ-2, which sets the number of copies, is supplied to one input terminal of a prohibition circuit, for example, an AND circuit 3, and the other input terminal of this AND circuit 3 is connected to the above-mentioned abnormal state detection circuit. 1 is supplied.When an abnormal state of the copying operation is detected by the AND circuit 3tI'i and the abnormal state detection circuit 1, the numeric keypad 2 is pressed until the signal indicating the abnormal state is confirmed. This is a circuit that prohibits the setting of the number of copies by using the numeric keypad 2. In other words, the signal from the numeric keypad 2 is normally It will be output as is. However, when an abnormal state is detected, a ``0'' signal is supplied from the abnormal state detection circuit 1 and the gate is closed, so that no signal is output from the numeric keypad 2. The output of the AND circuit 3 is supplied to a copy number display control circuit 4. This copy number display control circuit 4 has, for example, a down counter as a counting means, and in normal cases, when the number of copies is set with the numeric keypad 2, it is supplied via the AND circuit 3, and the set number of copies is (numerical value) is set in the down counter, and the contents of this down counter are counted down by rlJ in response to a copy end signal supplied each time one copy is made. Further, the copy number display control circuit 4 displays the contents of the down counter on a copy number display 5 serving as a display means.The copy number display 5 indicates the number of copies to be made. Each time the number of copies is made, the display content decreases by "1" and the remaining number of copies is displayed.

Next, the operation in such a configuration will be explained.

First, since the ul# signal is normally supplied from the abnormal state detection circuit 1 to the AND circuit 3, the gate of the AND circuit 3 is open. Therefore, if the number of copies is set using the numeric keypad 2, the setting content is the AND circuit 3.
is supplied to the copy number display control circuit 4 via the copy number display control circuit 4, and the copy number display control circuit 4 sets the setting contents in a down counter. As a result, the copy number display 5 displays the contents of the down counter, that is, the set number of copies. When the copy switch (not shown) is turned on in this state, the number of copies set using the numeric keypad 2 will be made one by one in succession. At this time, each time a copy is made, a copy end signal will be sent to indicate the number of copies. This is supplied to the display control circuit 5, whereby the contents of the down counter are counted down by 1, and the contents are displayed on the copy number display 5.During such continuous copying, the copy paper count in the copy machine is When an abnormal state in the copying operation such as a jam occurs and is detected by the abnormal state detection circuit 1, the output of the abnormal state detection circuit 1 changes from the 1'' signal to the ''0# signal. As a result, the gate of the AND circuit 3 is closed, so even if the numeric keypad 2 is pressed at this time, the signal is not supplied to the copy number display control circuit 4. Therefore, if the abnormal state detection circuit l detects an abnormal state, even if the numeric keypad 2 is pressed by mistake, the contents of the down counter will not be changed, and the copy number display 5 will therefore display the remaining number of copies. . When such an abnormal condition occurs, the copying machine is generally stopped, so the operator turns off the power, removes the jammed copy paper, etc. to clear the abnormal condition, and then turns on the power again. As a result, the abnormal state of the copying machine is released and the copying possible state is restored. When the abnormal state is released in this way, the output of the abnormal state detection circuit 1 becomes the ``'l'' signal again, and therefore, the output of the AND circuit 3 The gate is opened. Therefore, if the numeric keypad 2 is pressed here, the signal is supplied to the copy number display control circuit 4 via the AND circuit 3, and the contents of the down counter are changed and the copy number display is displayed. The display contents of 5 are also changed.

In addition, in the above embodiment, a case was explained in which the method is applied to a copying machine that uses a subtraction method to display the number of copies during continuous copying, but the same implementation is not limited to this, and can also be applied to a copying machine that uses an addition method to display the number of copies. Example [Effect of the Invention] As detailed above, according to the present invention, in a copying machine capable of continuous copying, when an abnormal state of copying operation is detected, the number of copies setting means is set until the abnormal state is canceled. Since setting of the number of copies is prohibited, it is possible to prevent setting of the number of copies while an abnormal state is being detected.

[Brief explanation of the drawing]

The drawing is a block diagram showing an embodiment of the present invention. 1... Abnormal state detection circuit, 2... Numeric keypad, 3...
・Prohibition circuit, 4... Copy number display control circuit, 5...
Copy number indicator. Representative Patent Attorney Noriyuki Chika (and 1 other person)

Claims (1)

[Claims] a copy number setting means for setting the number of copies, a number of copies set by the copy number setting means, and a number of copies set during continuous copying based on the set number of copies, the value changing for each copy. A counting means for counting, a display means for displaying the contents of the counting means, an abnormal state detecting means for detecting an abnormal state of the copying operation during the continuous copying, and an abnormal state of the copying operation from the abnormal state detecting means. 1. A copy number setting prevention method for a copying machine, characterized in that setting of the number of copies is prohibited in response to a signal indicating an abnormal state and before the signal indicating an abnormal state is released.