JPS58183547A - Device for detecting and displaying manually inserted paper - Google Patents

Abstract

PURPOSE:To prevent errors in copying, in a device for manually inserting copying papers for a copying machine, by providing a plurality of sensors for indicating the propriety of the position of a paper manually inserted, with the use of their outputs so that the copying process of the copying machine is started by utilizing a signal indicating the properly inserted position of the paper and a signal instructing the start of the copying process. CONSTITUTION:When the operator inserts, for example, an A4-size paper 6 into a paper loading plate 2, sensors 7b, 7c actuate substantially simultaneously together, and therefore, the outputs of both AND gates AND1, AND2 become high so that the output of an OR gate becomes also high, thereby LEDs L2, L4 in a display device 9 are lit on. In this stage, a copying process is started when the operator performs a predetermined button, since the instructing signal PS of print starting becomes high. At this time, if the above-mentioned paper 6 is loaded, deviating from its normal position, that is, the leading end of the paper 6 is detected by, for example, sensors 7c, 7d, an LEDL3 alone is lit on, and therefore, the copying process is not started even if the operator performs the predetermined button.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that is equipped with a manual feeder for copying paper and detects and displays whether a sheet manually inserted into an fC copying machine is in a proper position.

Conventionally, copying machines equipped with a manual paper feeding device have a machine that simplifies operation when a paper sensor installed near the insertion slot detects the leading edge of paper inserted manually and pulls in the paper based on the signal. It was common practice to start the copying process at the same time.

As a result, not only do operators forget to replace originals or insert paper of an inappropriate size, but even when paper is inserted at an angle, the operator is unable to calmly correct it, resulting in copying errors. The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional manual feed device, and the present invention has been made in order to eliminate the drawbacks of the conventional manual feed device as described above. Paper sensors for detecting paper of each size are arranged one above the other and the output of each sensor is used to indicate whether or not the paper insertion position is correct. An object of the present invention is to provide a manual sheet detection and display device that starts a copying process using a process start command signal.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a partially cutaway view showing the vicinity of the paper insertion opening of the manual paper detection and display device of the present invention.

Reference numeral 1 denotes a copying machine, and a manual paper tray 2 is fixed to one side edge of the copying machine. An arrow 3 indicating the center position of paper insertion and scales 4 and 5 indicating the width of each paper size are carved on the mounting table 2, and if the paper 6 is placed approximately along these marks and inserted after the paper is inserted, it will not be inserted incorrectly. Consideration will be given to making it possible.

In the interior of the machine near the scales 3, 4 and 5, there is a paper sensor 7a on m-, which is perpendicular to the paper conveyance direction.

7b, 7c and 7d are scales 4 and 5 indicating the respective sizes.
Place them at narrow intervals, such as the width of the The valley sensor is preferably a combination of a light emitting diode and a photocell in order to avoid skew due to contact with paper.

Paper transport ports 8 are provided at the back of the 74th to 74th rows of recording sensors, and the paper is drawn into the transport system in response to a signal to start the copying process.

The manual feed paper detection and display device constructed as described above is controlled by a control circuit shown in FIG.

That is, the outputs of the paper sensors 7a to 7d are amplified by the amplifiers AMPa to AMPd, respectively, or the signal from the paper sensor 7a is divided into two, and the - is applied to the first AND.
Invert the other to l and connect to the second AND2. The signal from the one-way sensor 7d is similarly divided into two, and the - is connected to the first AND gate AND1, and the other is inverted and connected to the second AND gate AND2. or,
The outputs of the sensors 7b and 7e are each divided into two and connected to both the AND gates.

The outputs of the first and second AND gates ANDI and AND2 are then used to drive transistors TRI and TR4, respectively, thereby lighting up LEDs L1 and L1, respectively.

Also, the outputs of both AND gates are branched and OR gates are used.
It is led to the gate OR and its output is divided into two.

One of the two divided outputs drives the transistor TR2, thereby lighting up the LED Lz, and the other one inverts the signal and drives the transistor TR3, thereby lighting the LED La.
lights up.

Furthermore, the output of the OR (or goo) OR and the print start signal PS, that is, the signal generated when the operator presses the print start button of the copying machine, are passed through a third AND3 as a copy start signal. Configure to output.

These LEDs L1 to L4 are installed as a display device 9 on the control panel of the copying machine.

The LEDs Ll to L4 are turned on when the inserted paper is 84. Copy possible, inserted paper is misaligned and inserted paper is A.
4 is displayed.

The manual feed mechanism configured as described above and its control circuit operate as follows.

Now, if the operator correctly inserts the A4 paper 6 into the correct position on the paper loading table 2, the sensors 7b and 7e will operate almost simultaneously, and the above-mentioned two will be output.
Since the outputs of AND2 are both HIGH (hereinafter abbreviated as H), the output of OR is also H and the output of
int, z and L4 light up. That is, it is displayed that the paper that can be copied and that the inserted paper is A4. Here, when the operator presses the print start button of the machine, the print start signal pB becomes H and the copying process is started.

On the other hand, when the A4 paper 6 is placed deviated from its normal position, for example when the sensors 7C and 7d detect the leading edge of the paper, the control circuit in FIG.
It is easy to understand that if only L3 is lit and the operator presses the print start button, the copying process will not start.

The output of the paper detection sensor, the lighting and extinguishing of the LED, and whether or not the copying process can be started are indicated by circles and circles in the truth table of FIG.

For the sake of simplicity, the present invention is limited to two types of manually inserted paper sizes, and a type of device in which the paper is registered in the conveyance direction at the center has been described, but it is obvious that the present invention is not limited to these. be.

In other words, if you want to increase the paper size that can be inserted manually, you can increase the number of gate stages in the circuit shown in Figure 2, but if the logic circuit becomes more complex than a certain limit, a microΦ processor can be used. All you have to do is attack.

Furthermore, it is clear that for a machine with a newly opened one-sided registration in which the registration t in the paper transport direction is shifted to one side regardless of the paper size, one sensor for each paper size may be used.

Since the present invention is configured and operates as described above, the operator calmly aligns and inserts the manual paper, and issues a command to start copying after seeing the copy OK display and the paper size display. Therefore, it has the effect of almost completely eliminating the risk of erroneous copying.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway view showing the arrangement of the manual paper detection device of the present invention, FIG. 2 is a circuit diagram showing its control circuit, and FIG.
The figure is a truth table of the logic circuit shown in FIG. 1...Copy machine 2...Paper insertion section (paper loading table) 6...Manual feed paper 7a, 7b, 7c and 7
d... Paper sensor SP... Copy start command signal Applicant Fuji Xerox Co., Ltd. Figure 3 f1+11j&11141. I4m9b-, continuation of ok74 page 1 0 Inventor Takaya Waho 2274 Hongo, Ebina City, Fuji Xerox Co., Ltd. Ebina Factory

Claims (1)

[Claims] In a copy paper manual feeding device of a copying machine, paper sensors for detecting paper of each size are arranged in a row in a position corresponding to the paper width to be used near the paper insertion part, and the output of each of the sensors is used. The manual feeder is characterized in that it displays the suitability of the inserted position of the manual feed paper, and starts the copying process using a signal indicating that the paper has been inserted properly and a copy start command signal issued by the operator. Paper detection display device.