JPH02266366A - Copy machine control method - Google Patents

Abstract

PURPOSE:To eliminate the need of separating transfer sheets in a double-sided copy tray by confirming that the double-sided copy tray has no transfer sheet, when a transfer sheet that is transferred on another side is jammed, then supplying a new one and copying the next original. CONSTITUTION:It is confirmed that the double-sided copy tray 122 has no transfer sheet 10 when the transfer sheet 10 is jammed after another side is transferred, and the new transfer sheet 10 is supplied and the next original is copied. Therefore, when the double-sided copy tray 122 has more transfer sheets 10 than a regulated number of transfer sheets because of failure such as the jam, even if the copying is stopped after double-sided copying is completed, several transfer sheets 10 for the next original enter the tray. However only, if it is confirmed that the tray 122 has no transfer sheet, the new transfer sheet 10 is not supplied from a mass storage supplying tray 130 and next copying is not carried out. Thus, the separation of transfer sheets in a double-sided copy tray is not needed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for controlling a copying machine that has the function of forming images on both sides of transfer paper, and more specifically, to a method for controlling a copying machine that has the function of forming images on both sides of transfer paper. The present invention relates to a method of controlling a copying machine, which is characterized by handling when a jam occurs on transfer paper of a copying machine that subsequently performs image transfer on the other side.

[Conventional technology]

In the case of double-sided copying, it is necessary to copy the image on the second side and then on the other side, so it is necessary to flip the transfer paper once. Therefore, in general, a tray for placing transfer paper, called a double-sided tray or an intermediate tray, is provided in the transfer paper conveyance path in a copying machine, and after copying an image on one side, The transfer paper on which the image has been copied is placed on the tray, and the next document surface is scanned to form an image on the photoconductor.The transfer paper is fed out in synchronization with the photoconductor, and the image is formed on the photoconductor. The resulting image is further copied onto the other side of the transfer paper. in this way,
Because of the need to reverse the transfer paper, in addition to the above-mentioned trays, a reversing unit designed to reverse the transfer paper by switching the conveyance path and a belt unit designed to hold the transfer paper by suctioning air are used. Some are configured to use .

On the other hand, when controlling double-sided copying in a copying machine having a double-sided copying function configured as described above, especially a copying machine that copies at high speed, in order to increase throughput, that is, copying efficiency, it is necessary to From copying one side (in other words, copying one side and then copying the other side, hereinafter referred to as back copy) to copying the front side of the next transfer sheet (in other words, copying the other side of the next side) When switching to an example of side copying (hereinafter referred to as front side copying), control is performed so that front side copies can be performed successively from the back side.

The operation timing of the original and transfer paper at this time is shown in Figure 4. This figure shows the operation timing when duplexing a single-sided original.The i-th original is transferred from the original feeding device onto the contact glass. In this case, the transfer paper that has already been copied on the back side is transported from the duplex tray to the transfer unit again to make 5 front side copies, and then the (1+1)th original is fed on 5 sheets from the large capacity paper feed tray. be. That is, as shown in FIG. 4, when the paper feed signal At for the original I is output, the paper feed signal B11+BI! for 5 sheets is output. ＋Bl
! +8141 B 5S is output at a predetermined timing, and the transfer paper that has been copied on one side is fed from the double-sided tray by this signal. Generally, when using a large-capacity paper feed tray, the distance from the large-capacity paper feed tray to the transport path is set to be much longer than the distance from the duplex tray to the transport path, so continuous copying is performed. In this case, if the transfer paper is conveyed from the intermediate tray by outputting the paper feed signal fats and then conveyed from the large capacity paper feed tray (i+
1) There will be a delay when copying the first original.

Therefore, the transfer paper for copying the (1+1)th original is supplied with the paper feed signal Bts for the last transfer paper from the double-sided tray.
Paper feed signal B (4,1
)1. As a result, the fifth sheet of transfer paper comes out from the duplex tray to the transport path, and the transfer paper from the large-capacity paper feed tray follows after it passes the meeting point with the transport path from the large-capacity paper feed tray. It is conveyed so that it enters the conveyance path. Note that the paper feed signal Btr* preceding the paper feed signal sis
As described above, the timing of ut is selected such that after the last transfer paper from the double-sided tray comes out onto the conveyance path, the transfer paper from the large-capacity paper feed tray follows.

[Problem to be solved by the invention]

By the way, when copying is controlled to be performed at high speed as shown in the above example, if a jam or the like occurs, more than a specified number of transfer sheets may end up in the duplex tray. That is, in such a case, even if copying is stopped after double-sided copying is completed, several copies of the next original are still placed in the double-sided tray.

Therefore, when continuous copying operations are performed, the transfer paper of the original 21111 ends up in the duplex tray, and the transfer paper of 211111 must be checked when separated, which is a time-consuming problem. there were. Furthermore, since there was no means to check whether the separation process was performed properly, there was an aspect of inconvenience in use.

Therefore, the first object of this invention is to propose a method for controlling a copying machine that eliminates the need to separate transfer sheets in a duplex tray during duplex copying. Also, the second
The purpose of is to easily check the presence or absence of transfer paper in the duplex tray in the event of a transfer paper jam, and to control the copier without having to visually check the presence or absence of transfer paper in the duplex tray or the separation status of the transfer paper. The goal is to propose a method.

[Means to solve the problem]

The first purpose is to provide a double-sided tray for storing transfer paper separately on the conveyance path of the transfer paper, and once the transfer paper with an image transferred to one side is stored in the double-sided tray, the transfer paper is transferred from the double-sided tray. In a method for controlling a copying machine with a double-sided copying function, which supplies paper and transfers an image to the other side after transferring the image on one side, forming images on both sides of the transfer paper, This is achieved by the first control method, in which when a jam of the transfer paper occurs after the side is transferred, after confirming that there is no transfer paper in the duplex tray, a new transfer paper is supplied and the next original is copied.

The second purpose is to use a control method for a copying machine with a similar double-sided copying function, when a jam occurs in the transfer paper after the transfer of the other side, and if the transfer paper remains in the double-sided tray. This is achieved by a second control method that displays that there is transfer paper remaining in the duplex tray without copying the next document.

[For production]

According to the first control method, if more than a specified number of sheets of transfer paper enters the duplex tray due to a malfunction such as a jam, the transfer paper of the next original will not be printed even if copying is stopped after duplex copying is completed. This will result in several sheets being inserted, but new transfer paper will be supplied and the next copy will not be made unless it is confirmed that there is no transfer paper in the duplex tray, so it is necessary to insert transfer paper for two types of originals. There is no need to separate or check the separation.

Furthermore, according to the second control method, if there is any transfer paper left in the double-sided tray, the next document is not copied;
Since the display indicates that there is transfer paper remaining in the duplex tray, there is no need to open the case of the copier and check the duplex tray in the event of a jam. Just remove the transfer paper.

〔Example〕

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

FIG. 2 is a schematic diagram showing the outline of the internal structure of the copying machine according to the embodiment.

In FIG. 2, the copying machine according to the embodiment includes a copying machine main body 1, an automatic document feeder (hereinafter referred to as DF) 2, and a large capacity paper feed tray section 3.

The copying machine main body 1 includes a contact glass 101 provided on the top surface of the main body at a position facing the above-mentioned DF 2, and a power source 103 that supplies power to the copying machine main body 1, and a document placed on the contact glass 101 side from the back side of the contact glass 101. a flash lamp 102 that irradiates light, and guides the reflected light from the original to a photoreceptor 107 on the belt (a first mirror 104 and a second mirror 106, and a through light that guides the reflected light from the first mirror 104 to the second mirror 106). A charger 108 is provided around the photoreceptor 107.
, eraser 109, developer 110, transfer charger 11
1. A separate charger 120 is provided.

The conveyance system for the transfer paper lO is the main body paper feed tray 112°113.
．． 114 and a large-capacity paper feed tray (hereinafter referred to as LCT) 130, and a conveyance path including a conveyance path 115 that takes out the transfer paper 10 from these transfer paper storage means and leads to the output tray 119. Mainly, the transfer paper lO led out from the transfer paper storage means is timed by the registration rollers 116 provided on the conveyance path 115, and then reaches the output tray 119 from the conveyance bell) 117 via the fixing device 118. It has become. In addition, the fuser 1
A double-sided tray 122 is attached to the conveyance path 121 between the tray 18 and the discharge tray 119, and from the bottom side of this double-sided tray 122, the conveyance path 1 that leads to the conveyance path 115 again is attached.
23 are provided.

DF2 includes a document tray 201, a document feed belt 202 for guiding the document placed on the document tray 201 toward the contact glass 101, and a conveyor belt 202 for conveying the document onto the contact glass along a document conveyance path 203. belt 204
and a document switching claw 205 that switches the conveyance direction of the document.
A document ejection roller 206 that can rotate forward and reverse, and a normal rotation conveyance path 207 through which the document passes when the document ejection roller 206 rotates in the normal direction.
and a reverse conveyance path 208 through which the document passes during reverse rotation.

When copying using the copying machine configured as described above, first, a necessary copying style is set on an operation section (not shown) provided on the copying machine main body 1, and the print button is pressed. Copying is thereby started, and the original placed on the original tray 201 of the DF 2 is fed by the original paper feed bell (202), passes through the original transport path 203, and passes through the contact glass 10.
1. When an original is placed on the contact glass 101, a flash lamp 102 is turned on and the entire surface of the original is irradiated with light. Power supply 1 for flash lamp 102
03 is given a charge in advance by the control device and emits light at a predetermined timing. The reflected light from the original is reflected by the first mirror 10.
4. The light is irradiated onto the belt-shaped photoreceptor 107 through the through lens 15 and the second mirror 10G, and the photoreceptor 107 is exposed. The photoreceptor 107 is uniformly charged with a charge by a charger 108, and an electrostatic latent image is formed by exposure.

The electrostatic latent image on the photoreceptor 107 has unnecessary charges removed by an eraser 109, is developed by a developer 110, and is transferred to a transfer paper 10 by a transfer charger 111. Thereafter, it is separated by a separation charger 120, fixed by a fixing device 118 via a conveyor belt 117, and conveyed onto an output tray 119. Note that the transfer paper 10 is fed to the main body paper feed trays 112, 113, 114 or LCT.
I30, passes through the conveyance path 115,
The photosensitive member 107 is transported to a transfer portion, that is, a position facing the transfer charger 111 and the separation charger 120, in synchronization with the electrostatic latent image formed on the photoreceptor 107 by the registration rollers 116.

The document on the contact glass 101 is transferred to the conveyor belt 204
After the light irradiation is completed, the document is sent out, and the document is sent out by the document ejection roller 206.
The document is then returned to the document tray 201 again. The document ejection roller 206 can rotate in the forward and reverse directions, and if you want the front and back sides of the document to be the same as the original state, after the trailing edge of the document passes the document switching claw 205, the document ejection roller 206 is rotated in the reverse direction. 2
07, and if the document is to be reversed, the document discharge roller 206 is driven as it is, and the document is discharged from the reversal conveyance path 208.

In the case of double-sided copying, the transfer paper 10 fixed by the fixing device 118 is transferred to the lower conveyance path 12 by the double-sided branch claw 121.
4 and stacked on the double-sided tray 122. When the back side copying is completed, the next document is sent onto the contact glass 101 by the DF 2, and the front side copying begins. At this time, the transfer paper 10 is sent from the lower side of the double-sided tray 122 to the conveyance path 115, and the latent image is transferred at the transfer section to perform front side copying. The operation timing of the original and the transfer paper 10 at this time is the same as that shown in FIG.
01, the transfer sheet on which the front side copy has already been made is conveyed again from the duplex tray 122 to the transfer unit to make 5 back side copies, and 5 sheets of the (++1)th original are sent from the LCT 130. be. That is, as shown in FIG. 4 described above, when the paper feed signal Al for the document i is output,
Paper feed signal Bt+, B tr B 4ff+ B, 4
+B js is output at a predetermined timing, and the transfer paper 10, which has been copied on one side, is fed from the double-sided tray 122 by this signal. When performing continuous copying, as can be seen from FIG.
15 is considerably longer than the distance from the duplex tray 122 to the conveyance path 115, so if the transfer paper 10 is conveyed from the intermediate tray 122 and then conveyed from the LCT 130, there will be a delay when copying the (++1)th original. will be left behind. Therefore, the paper feed signal B(J) for the transfer paper 10 for copying the (++1)th document is output at an earlier timing than the paper feed signal old for the last transfer paper 10 from the duplex tray 122. , ), and as a result, the fifth sheet of transfer paper 10 is fed into the duplex tray 1.
22 to the conveyance path 115, and at the point when the transfer paper 10 from the LCT 130 passes the confluence 125 of the conveyance path from the LCT 130, the transfer paper 10 subsequently enters the conveyance path 115 and is conveyed.

Therefore, even if a jam occurs and copying is stopped, the next original may be copied onto the transfer paper 10 from the LCT 130 and enter the duplex tray 122. In this case, if the jam is cleared and copying continues, , the order of copying the original changes, causing inconvenience. If a jam occurs, it is handled according to the procedure shown in FIG. That is, first, it is determined in step 1 (Sl) whether or not the back side copy has been completed, and if it has not been completed, the process returns to the back side copy routine and continues the back side copy w1. If the back side copy has been completed, it is determined in step 2 (S2) whether the front side copy is after a jam. If it is determined in step 2 (S2) that the copy is a front side copy after a jam, it is determined in step 3 (S3) whether there is any transfer paper 10 on the duplex tray 122.

If it is determined in this determination that the transfer paper IO is present, a subroutine for stopping copying in step 4 (S4) is executed. Thereafter, in step 5 (S5) it is determined whether copying has stopped, and if copying has stopped, a message that there is transfer paper 10 in the duplex tray 122 is displayed in step 6 (S6), and the process returns to the main routine. . When this display appears, the operator opens the front door of the copying machine, takes out the transfer paper 10 in the duplex tray 122 from the duplex tray 122, and performs the subsequent copying operation. When do you step? The next original is copied in (S7), and the transfer paper is placed in the duplex tray 122 in step 3 (33).
When there is no O, step? In (S7), copying of the next original is executed in the same manner.

That is, as shown in steps 2 and 3,
As shown in Fig. 4, the front side copy after a jam is performed only when the double-sided tray paper no signal C is output after the 5th paper feed signal BiS of double-sided paper feeding is output.
Paper feed signal B for the first sheet of transfer paper from (1+11 +
is output and the transfer paper 10 is sent out to the transport path 115. Then, the paper feed signal A! of the document H+1) is output. , 1 are output, the document is sent onto the contact glass 101 in response to this, and a predetermined paper feed signal B(!$1)
b B(1111B(lid 0 opening a, B(h+1), the transfer paper 10 is conveyed from the LCT 130 to the transfer unit, and the front side copy is executed.

Note that control according to the above flowchart is performed via a central processing unit (CPU) of a control circuit in the copying machine (not shown), and the display that the transfer paper 10 is in the duplex tray 122 is displayed on the display section of the operation panel (not shown). is shown.

〔Effect of the invention〕

As is clear from the above description, the invention configured as described above has the following effects.

That is, according to the invention described in claim 1, when a jam occurs in the transfer paper after transferring the other side, after confirming that there is no transfer paper in the duplex tray, copy the next original by using a new transfer paper. There is no need to separate the transfer sheets depending on the document type in the double-sided tray, and there is no need to duplicate the transfer sheets, so there is no possibility that the order of copying will change.

Further, according to the second aspect of the invention, when a jam occurs in the transfer paper after the transfer of the other side, if the transfer paper remains in the duplex tray, the next document is not copied; The display indicates that there is transfer paper left in the duplex tray, so the operator can simply remove the remaining transfer paper from the duplex tray and try copying again. There is no need to visually check the presence or absence of transfer paper or the separation state of the transfer paper, which simplifies post-jam processing.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the procedure for carrying out the method of this invention, FIG. 2 is a schematic configuration diagram showing the internal structure of a copying machine according to an embodiment, and FIG. 3 is a diagram showing the timing of paper feeding from an LCT according to an embodiment. Timing Chart FIG. 4 is a timing chart showing the timing of sheet feeding from the LCT which has been conventionally implemented. ■・・・Copy machine main body, 2...Document feeder (DF), 3...Large capacity paper feed tray section, 10
...Transfer paper, 115, 121, 123...
...Conveyance path, 122...Double-sided tray, 130
...Large capacity paper feed tray. Diagram

Claims (2)

[Claims] (1) A screen tray for storing transfer paper is provided separately on the transfer paper transport path, and after the transfer paper with an image transferred to one side is once stored in the screen tray, the transfer paper is fed from the double-sided tray. In a method of controlling a copying machine with a double-sided copying function, in which an image is transferred again to the other side following the transfer of one side, and images are formed on both sides of the transfer paper, after the transfer of the other side, A copying machine control method characterized in that when a transfer paper jam occurs, after confirming that there is no transfer paper in a screen tray, a new transfer paper is supplied and the next document is copied. (2) A double-sided tray for storing transfer paper is provided on the conveyance path of the transfer paper, and after the transfer paper with an image transferred to one side is once stored in the double-sided tray, the transfer paper is fed from the double-sided tray. In a method of controlling a copying machine with a double-sided copying function, in which an image is transferred again to the other side following the transfer of one side, and images are formed on both sides of the transfer paper, after the transfer of the other side, A copying machine characterized in that when a transfer paper jam occurs and there is transfer paper remaining in the duplex tray, the next document is not copied and a message indicating that the transfer paper remains in the duplex tray is displayed. control method.