JPS6026329A - Original leaving preventing device of copying machine - Google Patents

Abstract

PURPOSE:To prevent securely an original from being left by detecting an original pressure plate not being lifted after copying operation and no operator being present within a specific distance, and warning that the original is left. CONSTITUTION:A decision on whether an operator is present within the specific distance from a copying machine frame or not is made unless the original pressure plate 2 is lifted after copying is completed and an original pressure plate detection flag 3 is set. When the operator is within the specific distance, an ultrasonic wave generated by an ultrasonic oscillator 26 is reflected by the operator and inputted to a microphone 27. When not, a copying paper detector 1 makes the decision by detecting whether light from a lamp 33 for a sensor is photodetected or not. When there is no copying paper on a paper discharge dish 32, it is considered that the operator leaves the copying machine frame while carrying all sheets of copying paper. Then, a display part 8 displays a warning on an LED and also turns on a warning buzzer 9 to let the operator and other people aroung the machine know that the original is left, thus preventing the original from being left.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a device for preventing a document from being left behind in a copying machine, which detects and issues a warning when an operator leaves behind a document after copying has been completed.

[Prior art]

Normally, copying machines are not equipped with a means to prevent one document from being left behind, so for example! (l! When copying a Yuzu manuscript, there were cases where the last copied manuscript was left behind on the manuscript table, and the remaining Sen manuscript and the copy paper that had been copied were taken away. The drawbacks were that important manuscripts were lost and time was wasted.

[Object of the Invention 1 This invention was made in order to eliminate the above-mentioned entry point, and the copy paper that has been copied is removed from the paper ejection tray without lifting the document pressure plate after copying is completed. lu < becomes,
In addition, by providing a warning means that warns the operator that the document has been left behind when the operator is not within one foot distance, if the operator has left the document behind, it can be detected and a warning will be issued by a C buzzer etc., ensuring that the document is not left behind. 14 Copy machine misplacement prevention device 4 that can prevent misplaced originals
is intended to provide.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a block diagram schematically showing a document misplacement prevention device for a copying machine according to the present invention. In the figure, 1 is the original platen glass on which the original to be copied is placed, 2 is the original pressure plate that presses the placed original, 3 is the original pressure plate detection switch that detects the opening/closing of the original pressure plate 2, and 4 is the operation unit. push button switch 5
, a set number of copies display section 6, a copy number display section 7, a document 1 forgotten display section 8 which is displayed using an LED (light emitting diode), a warning buzzer 9, and the like. Exposure bulbs 11, 12, 13, and 14 for irradiating the 10th original are the 1st 1. Second. The third and fourth mirrors; 16, an imaging lens disposed in the optical system; 17, a charged electrode that discharges a negative corona onto the surface of the photosensitive drum 15; 18, an electrostatic latent image formed on the photosensitive drum 15; A developing device for visualizing, 19 a transfer pole for transferring the OJ visualized original image from a cassette 20 onto copy paper fed by a paper feed roller 21 and a registration roller 22, and 23 a transfer pole on which an image of the original 1ifll is transferred; 24 is a separation electrode that separates the copied paper from the photosensitive drum 15; 24 is a removal electrode that erases the charge remaining on the photosensitive drum 15 after transfer; 25;
26 and 27 are cleaners that clean and collect residual toner from the photosensitive drum 15, and 26 and 27 are placed below the main body of the copying machine. It is arranged. 28 is a conveyor belt that conveys the transferred copy paper, 29 is a fixing roller that fixes the toner on the transferred copy paper, and 30 is a paper ejection detector that detects that the copy paper that has been copied has not been ejected. The copy paper detector 31 detects the presence or absence of one liter of copy paper on the paper discharge tray 32. It uses a photo sensor and is placed at a position where it can receive the light emitted from the sensor lamp 33. be. 34 is a control circuit section that constitutes a control system together with the operation section 4.

FIG. 2 shows an example of the control circuit section 34.
FIG. 1 is a block diagram on the l side. The microcomputer 35 receives signals A and B for normal copying operations, such as the number of copies of the original and the variable magnification set by the operation unit 4. C in the figure,
l), E is AMP (amplifier), and F is driver.

The operation will be explained based on the above configuration.

After placing the original on the original glass 1 and pressing the original pressure plate 2, set the number of copies, variable magnification, etc. using the operation unit 4 (12).
, press the operation push button switch 5. The control circuit section 34 reads the signal set by the operation section 4 and starts the copying operation.

When the exposure lamp 10 is turned on and irradiates the original, light reflected from the original forms an image on the photosensitive drum 15 via mirrors 11, 12, 13 and 14. 15 photosensitive drums 1 charging electrode
7 uniformly applies a negative charge, and an electrostatic m-image corresponding to the original image is formed on the surface of the photosensitive drum 15 depending on the intensity of the imaged reflected light. Toner is applied to this electrostatic latent image by a developing device 18 to make it visible.

On the other hand, the copy paper fed from the cassette 20 by the paper feed roller 21 is timed so that the leading edge of the visible image and the leading edge of the copy paper match, and the registration roller 21
2. The photosensitive drum 1 is placed on this copy paper.
A visible image of 5 is transferred by the transfer pole 19. The copy paper on which the toner image is transferred is separated from the photosensitive drum 15 by a separation pole, and transferred to the fixing roller 2 by a conveyor belt 28.
Sent to 9. The copy paper, on which the toner has been fixed by the fixed shoulder roller 29 and copying has been completed, is discharged by the ejector and ejector 30, which detects that it has been ejected, and ejects it onto the paper ejection surface 32.

Further, the photosensitive drum 15 after the above-described transfer is transferred to the removal electrode 2
4, the remaining toner is cleaned and collected by the cleaner 25 (711), and preparations are made for the next image formation.

In this way, the copying operation is repeated until the number of copies set on the operation unit 4 matches the number of copies 7, and the paper ejection detector 3
The copying operation is completed when no more paper is removed.

Next, if you forget the original on the original glass stand 1 after copying according to the flowchart in Figure 3,
Explain the groove pillar that detects and warns.

The paper discharge detector 30 detects whether or not copying is completed [7
(a) If completed, the sensor lamp 33 and the ultrasonic oscillator 26 are turned on, and (b) the presence or absence of copy paper on the paper discharge tray 32 and the presence or absence of an operator are detected. At the same time, the document pressure plate detection flag (not shown, but a bit signal circuit for detecting ON/OFF of the document pressure plate detection switch 3) is set L and C (c). Then, the document pressure plate detection switch 3 detects whether the document pressure plate 2 has been lifted or not (7). If the document pressure plate 2 has been lifted, the document pressure plate detection switch 3 becomes 01"F and the document pressure plate detection flag is reset. (e).In other words, when the original pressure plate 2 is opened and the original is removed after copying is completed, the original pressure plate detection flag is reset, and if the original 41-wo has not been removed, it will remain set, so this By detecting whether the pressure plate detection flag remains set or is set, it can be determined whether the document has been taken.

After copying is completed and the -C original pressure plate detection flag is set,
If the original pressure plate 2 is not lifted, it is determined whether the operator is within a certain distance from the copying machine main body (step 3). If an operator exists within a certain distance, the ultrasonic waves emitted from the ultrasonic oscillator 26 are reflected from the operator and input into the ultrasonic microphone 27. No reflected waves are input to the sound wave microphone/27. If the C5 operator is present, the light from the sensor lamp 33 is received by the copy paper detector 31 to determine whether there is a copy paper on the paper discharge tray 32, that is, whether the operator has removed the copy paper. (g). There is no copy paper on the paper discharge tray 32! :(If so, the operator has moved away from the copier main body by more than a certain distance while holding all the copies, and in the next step it is determined whether the document pressure plate detection flag remains set (H).Here, If the document pressure plate detection flag is set, it means that the document is placed on the original document table glass 1, which means that the operator has left the document behind. At the same time, a warning is displayed by L EL), and a notification buzzer (9fc) sounds to notify the operator and other people around you that the document has been left behind. This warning display and warning buzzer 9
The alarm may be stopped when the document is taken out from the document table glass 1, or may be stopped unconditionally after a certain period of time.

In this way, even if the operator forgets to leave a document behind, the system is equipped with a warning means that displays a bill or sounds the warning buzzer 9, so it is possible to reliably prevent the operator from leaving the document behind. In the example, an ultrasonic wave is used to detect the presence of an operator, a photo sensor that detects light is used to detect the copy paper on the paper ejection tray 32, and a switch 3 is used to detect the opening/closing of the document pressure plate 2. In addition to these detection means, other detection means may also be used. In addition, as shown in Fig. 3, the check for misplaced originals starts from the time when copying is completed, but when the set number of sheets matches the number of copies, the exposure lamp 10) jA document scan is completed. You may start from this point.

〔Effect of the invention〕

As described above, according to the present invention, there is a copy paper detecting means for detecting whether copy paper is discharged onto a paper discharge tray after copying is completed, and an IJij manuscript pressure plate detection means for detecting the opening/closing of the manuscript pressure plate. means, an operator detection means for detecting the presence or absence of an operator within a certain distance from the copying machine body, and an operator detection means for warning that the original It@@ is forgotten when the original pressure plate is not lifted after copying is completed and the operator is not present within the certain distance. Since the present invention is equipped with a warning means, if the operator leaves behind a document, this can be detected and a warning can be issued by a buzzer or the like, which has the effect of reliably preventing the document from being left behind.

[Brief explanation of the drawing]

FIG. 1 is a block diagram schematically showing a device for preventing a document 1 from being left behind in a copying machine according to the present invention, a vJz diagram is a control block diagram of the control circuit section shown in FIG. 1, and FIG. It is a flowchart showing the process of doing. 2... Original pressure plate 3... Original pressure plate detection switch 8...
...Original misplaced display section 9 ...Warning buzzer 26 ... Ultrasonic oscillator 27 ... Ultrasonic microphone 30 ... Paper ejection Detector 31... Copy paper director 32... Paper discharge tray 33... Sensor lamp

Claims (1)

[Claims] A copy paper detection means for detecting the presence or absence of an iV copy sheet discharged onto the paper discharge tray after N4 is completed, and a document pressure root detection means for detecting the opening/closing of the document pressure plate, and a copy paper detection means for detecting the presence or absence of the iV copy paper discharged onto the paper discharge tray after N4 is completed; an operator detecting means for detecting the presence or absence of an operator at
A document misplacing prevention device for a copying machine, characterized in that it includes a means for warning of forgetting.