JPS6162065A - Copying machine provided with automatic original carrying device and both-side copying function - Google Patents

Abstract

PURPOSE:To shorten a copying time and to reduce the hurt of an original by detecting the number of originals at the time of a surface copying cycle, uniforming copy/skip operation independently of even and odd numbers, reversing the original after the end of a back copying cycle when the number of originals is an even number to discharge the copied sheet. CONSTITUTION:An original is set up on a prescribed position of a platen glass 33 of a machine body 1, the copy/skip operation is executed, and during the operation, the number of originals is detected by an original sheet number detecting sensor 15. If the number of originals is an even number, the original is fixed by a fixer 5 and then discharged to the surface of a paper discharging tray 7 arranged on the outside of the machine by a pair of discharge rollers 6, 6'. When the number of originals is an odd number, the copy/skip operation is executed in the same manner as the case of the even number. In this case, the back copying of the 1st sheet carried from the inverting tray 10 is not executed. After fixing the sheet by the fixer 5, a controller 18 sends the sheet once to an inverting chute 9 to invert the sheet on the basis of a signal from a sensor 15 and then discharges the sheet to the surface of the paper discharging tray 7 by the discharging rollers 6, 6'.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a copying machine equipped with an automatic document feeder and capable of making double-sided copies from single-sided originals using the device.

(Prior Art) A conventional copying machine of this type is equipped with an automatic document feeder on the platen glass surface at the top of the machine body, and the document is automatically set at a predetermined position on the platen glass and then ejected. In addition, an invert chute for reversing the paper should be installed in a part of the paper transport path from the paper feed section inside the machine, through the photoconductor transfer section and fixing device, to the paper output tray outside the machine. By providing a circulation path for paper from the invert chute, etc., to the transfer section of the photoreceptor through an invert tray where the inverted paper is temporarily stored, in the case of double-sided copying, the paper is sent out from the paper feed section. The unfixed toner image is transferred onto the surface of the paper using the transfer section of the photoreceptor, the image is fixed using the fixing device L, the image is reversed using an invert chute, etc., and temporarily sudocked onto the invert tray, and then the unfixed toner image is transferred to the surface of the paper using the transfer section of the photoreceptor. The toner image is transferred to the transfer section of the photoreceptor, and the unfixed toner image is transferred to the back side of the paper (17). After the image is fixed by a fixing device, it is ejected to a paper ejection tray outside the machine. It had been. When the copying machine makes a double-sided copy from a single-sided original, the original is first passed through the automatic document feeder, and it is determined whether the number of sheets is an even or odd number, and the copy mode is selected based on this. If the number of sheets is even, copies 17, 2, and 4 of the -, 3rd, and 5th sheets of the original in the front copy cycle.

The sixth sheet is skipped, and in the next reverse cycle, the -, third, and fifth sheets are skipped, and then the second sheet is skipped.

By copying the fourth and sixth sheets, the images of the six single-sided originals are copied in order on the front and back sides of the three sheets of paper, and if the originals are an odd number such as three sheets, During the back side copy cycle, copy/
The skip operation was reversed.

(Problems to be Solved by the Invention) Therefore, in a copying machine equipped with the above-mentioned conventional automatic document feeder,
When using this device to make double-sided copies from a set of single-sided originals, the original must be run three cycles through the automatic document feeder to detect the number of sheets, and to copy the front and back sides. This had the disadvantage that it took more time than the original one hour copying process and the manuscript was more damaged.

(Means and effects for solving the problem) The present invention is designed to eliminate the drawbacks that occur when making double-sided copies from single-sided originals using the above-mentioned conventional copying machine equipped with an automatic document feeder. The number of sheets of the original is detected during a front copy cycle using an automatic document feeder, and the copying/skipping operation of the machine for the original can be performed in the same way regardless of whether the number of sheets is even or odd. In addition, when the number of sheets of the document is odd, the paper after the reverse side copy cycle is inverted using an invert chute or the like before being discharged onto the paper output tray outside the machine. The copying time can be reduced by one hour, the damage to the original can be reduced, and the top and bottom and order of the ejected sheets can be automatically aligned.

(Example) The present invention will be described in detail below based on an example shown in the drawings.

FIG. 1 is a schematic configuration diagram showing an embodiment of a copying machine according to the present invention;
FIG. 2 is an electrical block diagram of some mechanisms in the same machine.

In these figures, the paper conveyance path 1 in the machine body;
a conveyance path 8 from a paper feed section 2 provided at an appropriate location in the main body 1, through a transfer section 4 of a photoreceptor 3, through a fixing device 5, and to a paper output tray 7 outside the machine by a pair of discharge rollers 6, 6'; The sheet is passed through an invert chute 9 for reversing the sheet from between the fixing device 5 and the discharge roller pair 6.6' in the transport path 8, and an invert tray for temporarily storing the sheet reversed by the chute 9 in a sudock 17. 10 and an invert feeding path 11 that reaches the transfer section 4 of the photoreceptor 3 is provided.

Then, the fixing t45 is passed through the fixing t45 at a proper place on the conveyance path 8 corresponding to the exit of the invert chute 9 in the invert conveyance path 11. The incoming paper is directly ejected by pair of rollers 6,
A direction changing device 12 is provided for changing the traveling direction to the direction of the discharge roller pair 6', the direction of the invert tray 10 via the invert chute 9, and the direction of the discharge roller pair 6°6' via the invert chute 9. An automatic document feeder 14 is provided on the platen glass 13 surface at the top of the machine body 1, and in the automatic document feeder f14,
For example, a sensor 15 for detecting the number of originals is provided near the entrance or at a suitable location under the platen glass 13 of the machine body 1, and the originals placed on the original table 16 in front of the entrance of the automatic document feeder 140 are The number of sheets is detected when the documents are automatically fed to the paper output tray 17 provided on the exit side, and all copy/skip operations for originals by the machine are performed in the order of copying first and then skipping. [7] A direction changing device 12 for changing the conveying direction of the paper in the machine body 1 and a number of originals provided near the entrance of the automatic document feeder 140 or at an appropriate location under the platen glass 13 or the like in the machine body 1. The detection sensor 15 is connected to a controller 18 using a microcomputer or the like placed at an appropriate location within the machine body, and the controller 18 controls the copy mode of the machine to perform double-sided copying from multiple single-sided originals. When the paper is set to the S/D mode, the paper transport path is automatically set to the invert transport path 11, and the controller 18 also controls the front copy cycle in the S/D mode. At this time, a document number detection sensor 1 detects the number of documents being automatically fed on the platen glass 13 by the automatic document feeder 14.
Based on the detection signal from 5, it is determined whether the number of sheets of the document is an even number or an odd number, and based on this, if the number is odd, copying is performed only on the first sheet of paper in the reverse side copy cycle. The transfer section 4 of the photoreceptor is controlled in this case, and in this case, the paper is completely discharged after passing through the fixing device 5, being reversed by the invert chute 9, and then being discharged outside the machine via a pair of discharge rollers 6 and 6'. The paper conveyance path can be set so that the paper is discharged onto the paper tray 7.

The present invention is constructed as described above. Next, its operation will be explained.

First, when making two-sided copies from four even-numbered single-sided originals, the operation flow is as shown in the flowchart in Figure 3. First, press the start button and check whether the copy mode is S/D mode or not. to judge. When the mode is the S/D mode, the paper conveyance path in the machine body 1 is as shown in Figure 4 (Fig.
An invert feed path 11 indicated by the solid line of Al is formed. On the other hand, the document before the entrance of the automatic document feeder 14! i! The four originals placed on the stand 16 are set in the predetermined positions of the platen glass 13 of the machine body 1 by the device 14 in order from the bottom, and the fourth copy is made by the machine.

The person who performed the copy/skip operations of skipping the third sheet, copying the third sheet, and skipping the first sheet, the automatic document feeder 14
The paper is discharged onto a paper discharge tray 17 provided on the exit side of the paper.

During this operation, the number of originals is detected by the original number detection sensor 15, and based on the detection signal, the controller 18 determines that the number is even. The transfer section of the photoreceptor 3 transfers the fourth and third sheets of the four original documents onto the surfaces of the two sheets of paper sent out from the paper feed section 2 by controlling the transfer operations in the respective sections. Only the image of the original with the eyes is transferred. After the paper onto which the original image has been transferred is fixed by the fixing device 5, the direction changing device 12
The sample is transferred into the invert chute 9, where its surface is inverted, and then temporarily docked into the invert tray 10. When this front side copy cycle is completed, the paper conveyance path is automatically switched from the state shown in FIG. 4(A) to the state shown by the solid line in FIG. The copy/skip operation of the machine for the original is also switched in the order of 4th, 3rd sheet skip, 3rd, and 1st sheet copy, and the paper temporarily docked in the invert tray 10 is exposed to light on its back side in the next back side copy cycle. After the third and first sheets of the four documents are transferred by the transfer unit 4 of the body 3 and fixed by the fixing device 5, they are transferred to the output tray 7 outside the machine by the pair of output rollers 6, 6'. Excrete it upwards. The output state of the paper is such that the first and third pages of the original are on the front and back sides of the top paper, and the third and fourth pages of the manuscript are arranged in order on the bottom paper. state.

On the other hand, when two double-sided copies and one single-sided copy are to be made from, for example, an odd number of five single-sided originals, the situation is as follows. That is, the paper conveyance path during the front copy cycle is the same as that shown in FIG. 4 (Al) when an even number of sheets is printed, as shown by the solid line in FIG. 5 (Al).

The copy/skip operations of the machine for these originals are also in the even-numbered time order, with the first being a copy and the next being a skip, so in the case of five originals during the front copy cycle, five, three, one. The 5th, 3rd, and 1st sheets of these originals are transferred onto the surfaces of the three sheets fed from the paper feed section 2 and fixed. After that, the paper itself is reversed in the invert chute 9, and then temporarily transferred to the invert tray 10.
Stock up inside. On the other hand, at the stage where the front side copying is completed, it is determined by the original number detection sensor 15 that these sheets are an odd number, so the controller 18 adjusts the paper conveyance path based on the signal as shown in FIG. 5 (Bl). After fixing in the fixing device 5, the conveyance path is set so that the sheet is sent to the -tan invert chute 9, reversed, and then discharged onto the paper discharge tray 7 outside the machine by a pair of discharge rollers 6 and 6'. The transfer of the transfer unit 4 of the photoconductor 3 is also set so that the first sheet fed from the invert tray 10 is ejected without being transferred. From the bottom, the images of the fifth page of the original are copied onto the front side of the third sheet of paper that is ejected onto the paper output tray 7, and the third and fourth sheets of the original are copied onto the front and back sides. The second sheet of paper is automatically aligned in the order such as the first sheet of paper with the first and second sheets of the original copied front and back.

(Effects of the Invention) The present invention is configured as described above and operates in a controlled manner, and is a copying machine equipped with an automatic document feeder and configured to be able to make double-sided copies from a plurality of single-sided documents. The number of sheets is counted during the front copy cycle and it is possible to detect whether the number of sheets is even or odd, so unlike conventional copying machines of this type, the automatic original is activated once before copying the original. There is no need to use the feeder to detect the number of sheets, so the copying time can be shortened by that amount, the damage to the original can be reduced, and the machine can copy/skip the original. By making the operations first copy, then skip, regardless of whether the number of sheets is even or odd, there is no need to perform operations for that operation, which simplifies the copy/skip operation mechanism of the machine and prevents failures. In addition, when the number of original sheets is an odd number, the paper on which the image of the original is copied is passed through the transfer section during the reverse copy cycle, and the second and subsequent sheets are At the same time, the paper after the back side copy cycle is transferred to the output tray 7 outside the machine.
When the paper is ejected upward, it is inverted by the invert chute 9 before being ejected, and the order of the pages can be automatically arranged, so that the order of the pages can be automatically arranged. When performing post-processing such as automatic stapling, it is possible to proceed with the work smoothly.

It should be noted that there is no reason why the present invention should be limited to the above-mentioned embodiments. Needless to say, it is possible to use a chute or other reversing device.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of a copying machine according to the present invention;
Fig. 2 is an electrical block diagram of some mechanisms in the same machine, Fig. 3 is a flowchart of the same machine, Fig. 4 (A) is the same,
A schematic diagram of the paper conveyance path during the front side copy cycle when the machine has an even number of originals; FIG. 4 (B) is a schematic diagram of the paper conveyance path during the back side copy cycle; FIG. is a schematic diagram of the paper conveyance path during the front side copy cycle when an odd number of sheets are printed, and FIG. 5(B) is a schematic diagram of the paper conveyance path during the back side copy cycle. ... Paper feeding section, 3... Photoreceptor, 4... Transfer section, 5... Fixing device, 6, 6'...
Ejection roller pair, 7... Paper ejection tray, 8... Conveyance path,
9... Invert chute, 10... Invert tray, 11... Invert feeding path, 12... Direction changing device, 13... Platen glass, 14... Automatic document feeder, 15... Document number detection sensor, 16...
・Document placement table, 17... Paper output tray, controller. Figure 3 Special opening 361-12065 (6) Figure 4

Claims (1)

[Claims] Equipped with an automatic document feeder, the paper transport path within the machine body is divided into a normal transport path that ejects the paper outside the machine only after copying the front side, and a reverse transfer path that copies the back side after copying the front side. In a copying machine configured to automatically make double-sided copies from a plurality of single-sided originals using the automatic document feeder, the copying machine is arranged at an appropriate position on the machine body or the automatic document feeder to When making a double-sided copy from a single-sided original using the automatic document feeder, the original number detection sensor that detects the number of originals is activated during the front-side copy cycle to detect whether the number of originals is even or odd. The sensor is connected via a controller or the like to a transfer section of a photoconductor in the machine body and a paper traveling direction changing device for converting the paper transport path to either a normal transport path or a reverse transport path, and By making the copy/skip operation of the machine constant for originals regardless of whether the number of originals is even or odd, when the number of originals is an odd number, the photoconductor for the first sheet of paper during the back copy cycle is The transfer at the transfer section is removed and passed through, and the second and subsequent sheets are copied, while all the sheets after the back side copy cycle when the original is an odd number are reversed at a part of the reverse transfer path. A copying machine capable of double-sided copying of single-sided originals and equipped with an automatic document feeder, characterized in that the copying machine is configured to eject the original onto a paper ejection tray outside the machine.