JPH0132139B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper sheet feeding and conveying device that feeds and conveys copy paper in, for example, an electronic copying machine that performs continuous copying.

Recently, various electronic copying machines that perform continuous copying have been developed and put into practical use. The copy paper supply and conveyance means in this type of copying machine supplies copy paper from a paper feed cassette in response to a supply command signal, conveys the copy paper to a transfer section through a conveyance path, and then conveys the copy paper through a conveyance path. The paper is then conveyed through a fixing device and to an ejection port. The number of sheets supplied from the paper feed cassette is displayed as the number of copies on the copy number display. Additionally, if an abnormality such as a paper jam occurs on the conveyance path during continuous copying, the copy paper is fed and conveyed by removing the jammed copy paper from the conveyance path and restarting the copying operation. It's becoming like that. Therefore, in such a case, the number of copies displayed on the copy number display,
In other words, there was a problem in that the number of sheets supplied did not match the number of sheets that were actually properly copied and ejected from the machine, making it difficult to determine the number of sheets that were correctly copied. Therefore, in order for the operator to know the number of copies that have been successfully made, it is necessary to perform processing such as counting the number of sheets that have been ejected.

This invention was made in view of the above circumstances,
The purpose is to provide a paper sheet conveyance/feeding device that can inform the user of the number of copies to be made during normal times, and can inform the user of the number of sheets that have been normally fed and conveyed when an abnormality occurs. .

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

FIG. 1 schematically shows the internal mechanism of an electronic copying machine according to the present invention. That is, the document placed on the document table 1 is irradiated with light by the light source 2 that moves forward in the direction of the arrow by the camshaft 21, and the reflected light is reflected by the lens 3 that moves forward in the direction of the arrow along with the light source 2. ₁ to the mirror 3 ₂ to reach the photoreceptor drum 4 , and the image of the document is formed on the photoreceptor drum 4 . The photosensitive drum 4 rotates in the direction of the arrow shown in the figure, and is first charged with a charger 5.
The image of the document is then slit exposed to form an electrostatic latent image on its surface. This electrostatic latent image is made visible by adhering toner to it by the developing device 6, and this toner image is attracted to the copy paper 8 by being charged to the copy paper 8 by the transfer charger 7. As a result, the toner image is transferred onto the copy paper 8. The photosensitive drum 4 after the transfer is reversely charged by the charger 9, so that
The current charge is removed.

On the other hand, the copy paper 8 is taken out from a supply section, for example, a paper feed cassette 10, by a take-out roller 11 in synchronization with the rotation of the photosensitive drum 4, and is sent to a transfer section by a conveyance roller 12. The copy paper 8 sent to the transfer section is
The transfer charger 7 comes into close contact with the photoreceptor drum 4, and the image on the photoreceptor drum 4 is transferred. The transfer paper 8 after transfer is transferred to the fixing device 1 by a conveyance roller 13, etc.
4, the transferred image is fixed by a heat roller 15 in a fixing device 14, and the copy paper 8 is discharged from a discharge port 17 to a discharge tray 18 by a discharge roller 16 or the like.

A paper feed detector 19 is provided near the take-out roller 11 to detect when the copy paper 8 is taken out from the paper feed cassette 10. Also,
In the vicinity of the discharge roller 16, that is, in the vicinity of the discharge port 17, there is a discharge detector 2 for detecting the discharge of the copy paper 8.
0 is set. The paper feed detector 19 and the paper discharge detector 20 are comprised of, for example, microswitches.

FIG. 2 shows the operation section of the electronic copying machine. That is, a copy switch 31 instructs to start copying, a numeric keypad 32 to set the number of copies, a set number display 33 to display the set number of copies for continuous copying,
It is composed of a copy number indicator 34 that displays the number of copies, a paper jam indicator 35 that displays paper jams, etc., and an interrupt switch 36.

FIG. 3 shows the main parts of the electric circuit, which is configured as follows, for example. That is, the control circuit 4
0 is the first detection signal from the paper feed detector 19.
A counting circuit (for example, an up/down counter) 41 adds the count, and displays the counted contents on the copy number display 34, and a detection signal from the paper feed detector 19 is added to a second counting circuit (for example, an up/down counter). ) 42, and the contents of this second counting circuit 42 are subtracted by the detection signal from the discharge detector 20. Further, the control circuit 40
The abnormality detection circuit 43 responds to the detection signal from the paper feed detector 19 and the detection signal from the discharge detector 20.
This is used to detect abnormalities such as paper jams. That is, when the ejection of the copy paper 8 corresponding to the detection is not detected even after a predetermined period of time has elapsed after the feeding of the copy paper 8 is detected, it is detected that an abnormality such as a paper jam has occurred. ing. moreover,
When the abnormality detection circuit 43 detects an abnormality, the control circuit 40 subtracts the contents of the first counting circuit 41 using the arithmetic circuit 44 and displays the subtraction result on the copy number display 34. It is something to do.

Next, the operation in such a configuration will be explained.
For example, if you now set the number of copies using the numeric keypad 32, the number of copies will be displayed on the set number display 3.
3. When the copy switch 31 is turned on, the main motor (not shown) is driven.
The photosensitive drum 4 rotates in the direction of the arrow. After a predetermined period of time has elapsed, the take-out roller 11, the conveyance roller 12, and the like operate. When copy paper 8 is taken out from paper feed cassette 10, paper feed detector 19 detects the paper feed. As a result, the first and second counting circuits 41 and 42 are counted up, and
“1” is displayed on the copy number display 34. At this time, the light source 2 and the lens 3 ₁ start moving forward.
The operations of the take-out roller 11 and the transport roller 12 are stopped, and the copy paper 8 is stopped before the charger 7. Thereafter, when the light source 2 and the lens ₃₁ move to a predetermined position, the conveying rollers 12 and 13 operate, and the temporarily stopped copy paper 8 is conveyed again. When the copy paper 8 is conveyed to a predetermined position, the light source 2 and lens ₃₁ are moved back. At this time, the second copy paper 8 is taken out from the paper feed cassette 10. As a result, the paper feed detector 19 detects the paper feed, the first and second counting circuits 41 and 42 count up, and "2" is displayed on the copy number display 34.

Then, when the light source 2 and the range ₃₁ return to their starting positions, they are moved forward again. after that,
The second copy paper 8 undergoes the same operation as the first copy paper 8. During this operation, the third sheet of copy paper is taken out from the paper feed cassette 10.
As a result, the paper feed detector 19 detects the paper feed, the first and second counting circuits 41 and 42 count up, and "3" is displayed on the copy number display 34. After a predetermined period of time has elapsed, the ejection detector 20 detects the ejection of the first copy paper 8. This causes the second counting circuit 42 to count down.

Thereafter, copy sheets 8 are sequentially taken out from the paper feed cassette 10 in the same manner as described above, and are discharged after undergoing a predetermined copying operation. Then, each time copy paper 8 is taken out from paper feed cassette 10, first and second counting circuits 41 and 4
2 is counted up, and the first counting circuit 4
1 is displayed on the copy number display 34, and each time the copy paper 8 is ejected, the second counting circuit 4
2 is counted down.

By the way, during continuous copying as described above, for example, when paper feed cassettes 10 to 20
Assume that after the 18th copy paper 8 is taken out, an abnormality such as a paper jam occurs with respect to the 18th copy paper 8.
Then, even after a predetermined period of time has elapsed since the feeding of the 18th copy paper 8 was detected, the discharge of the copy paper 8 is not detected, so the abnormality detection circuit 43 detects an abnormality. As a result, the control circuit 40
The paper jam indicator 35 is turned on, and the arithmetic circuit 44 subtracts the content of the first counting circuit 41 by the content of the second counting circuit 42, and the result of the subtraction is displayed on the copy number indicator 34. At this time, since the content of the first counting circuit 41 is "20" and the content of the second counting circuit 42 is "3", "17" is displayed on the copy number display 34. As a result, the operator knows that 17 sheets were successfully copied and ejected.

Therefore, if an abnormality such as a paper jam occurs during continuous copying and an attempt is made to remove the jammed copy paper and start copying, the copy paper 8 that has been successfully copied and ejected The number of sheets can be easily determined by the handler.

In the above embodiment, the first and second counting circuits perform the addition based on the detection output of the paper feed detector, but the first and second counting circuits are not limited to this, and the first and second counting circuits perform the addition based on the paper feed signal output from the control circuit. , the second counting circuit may perform the addition. In addition, we have explained the paper sheet feeding and conveying device used in copying machines.
The present invention is not limited to this, and can be similarly applied to a paper feeding/conveying device used in an electronic printing device or a facsimile machine having a similar mechanism.

As described in detail above, according to the present invention, when an abnormality is detected in the middle of continuous feeding operation, the first
The counting contents and paper sheets supplied from the supply section are 1
The number of sheets ejected from the ejection port is displayed by calculating the second count, which is added each time a sheet is conveyed and subtracted each time the ejection detector performs a detection operation. It is possible to provide a paper sheet conveying/feeding device that can notify a user of the number of copies to be made when an abnormality occurs, and can notify a user of the number of sheets that have been normally fed and conveyed when an abnormality occurs.

[Brief explanation of drawings]

The drawings show one embodiment of the invention.
The figure is a side view schematically showing the internal mechanism of the electronic copying machine, and FIG. 2 is a plan view showing the operation section of the electronic copying machine.
FIG. 3 is a block diagram showing the main parts of the electric circuit. 8... Copy paper (paper sheets), 10... Paper feed cassette (supply section), 17... Outlet, 19... Paper feed detector, 20... Output detector, 34... Copy number display (indicator), 40... control circuit, 41... first counting circuit, 42... second counting circuit, 43...
...Abnormality detection circuit, 44...Arithmetic circuit.

Claims (1)

[Scope of Claims] 1. A supply section that supplies paper sheets one by one; a conveyance path that transports the paper sheets supplied from the supply section, passes through the supplied section, and is discharged from the discharge port; a first counting circuit that adds up each time one sheet of paper is fed from the supply section; a display that displays the contents of the first counting circuit; a discharge detector that detects the discharge of leaves; and a second counting circuit that adds up each time a sheet of paper supplied from the supply section is conveyed and subtracts each time the discharge detector performs a detection operation. and an abnormality detection circuit that detects an abnormality based on whether or not the discharge detector operates within a predetermined time after the supply unit supplies paper sheets, and continuous supply from the supply unit. When the abnormality detection circuit detects an abnormality during the operation, the contents of the first counting circuit and the contents of the second counting circuit are calculated, and the number of sheets ejected from the ejection port is calculated as above. A paper sheet feeding and conveying device characterized by comprising: a display means; and a paper sheet feeding and conveying device.