JPS61189572A - Parallel conveyance copying machine - Google Patents

Abstract

PURPOSE:To increase a copying speed while holding the processing speed of image formation constant by carrying on copying operation continuously and erasing an untransferred side unless the jamming of one sheet of transfer paper affects the other sheet of transfer paper. CONSTITUTION:Copying operation is normally interrupted in case of jam occurrence in a copying machine, but if a jam occurs on a conveyance path in another copying mode, the other copying operation is carried out unless the jam position affects the other copying operation. The jam position where there is no influence is a paper unfeeding jam in a paper feeding device or both- surface tray or paper discharge defective jam at a paper discharge part. Branches B and E in flow charts (a) and (b) correspond to the paper unfeeding jam and paper discharge defect respectively. A paper feed sensor when turning on during the passing of paper turns on after paper feeding operation and a paper discharge sensor is positioned at a paper discharge port and turns on during the passing of paper. When the copying operation of one side is carried on, a jam occurrence side is erased and its image is not developed on a photosensitive body.

Description

[Detailed Description of the Invention] [Technical Field] The present invention has a function of conveying transfer paper in parallel.Prior art] Conventionally, in order to increase the copying speed of a copying machine, technology has been developed in the direction of increasing the process speed. I've been

However, as process speeds have increased, copying machines have become larger and more complex, and have become so-called high-end machines with high costs.

By the way, some copying machines have a conveying section that has a wide belt or a roller spacing that is capable of horizontally feeding A-3 paper, which is the maximum size paper.

〔the purpose〕

The present invention has been made based on this background, and an object of the present invention is to provide a copying machine that can increase the copying speed while keeping the image forming process speed constant by conveying transfer paper in parallel. shall be.

Another object of the present invention is to efficiently handle the jamming of one of the transfer sheets conveyed in parallel in a copying machine capable of parallel conveyance copying.

('ill configuration) In order to achieve the above object, the present invention conveys the corresponding transfer papers in parallel to the documents placed in parallel on the contact glass, and even if one of the transfer papers jams, the other does not If there is no problem, continue the copying operation and
This is characterized in that the untransferred side is erased.

Hereinafter, a detailed explanation will be given based on one embodiment of the present invention.

First, an outline of a copying machine will be explained using an example of the copying machine shown in FIG. The copying machine of this embodiment includes an automatic document feeder (hereinafter referred to as ADF device) 1 capable of parallel conveyance, which will be described later.
1 and a copying machine main body 12.

The ADF device 11 consists of a transport section 13, a paper feed section 14, a document setting section 15, and a document discharge section 16, and each time a document is manually set in the document setting section 15, the set document is automatically transferred. A mode in which a plurality of documents set in the document setting section 15 are automatically conveyed one by one onto the contact glass 17, and a mode in which the ADF device 11 itself is used as a pressure plate. It can be used with. In addition, this ADF device 11
It is also possible to place a book or the like directly on the contact glass 17 without using the contact glass 17.

The copying machine main body 12 has a contact glass 17 and a halogen (
Exposure) An exposure optical system consisting of an illumination unit 18 that includes a lamp 18a and a first mirror 18b and reciprocates in the direction of the arrow along the lower surface of the contact glass 17, second to fourth mirrors 19a to 19c, and a through lens 20; body (selenium photoconductor) drum 21, a charger 22 arranged along its periphery, an eraser (erase lamp) 23,
developing unit 24, pre-transfer charger (PTC) 25,
Transfer charger 26, separation charger 27, separation claw 28
, pre-cleaning charger (PCC) 29, cleaning unit 30, static elimination lamp 31, double-sided tray 3
2. First tray 33, second tray 34, third tray 42
, paper feeding roller units 35a to 35b1, a vertical conveyance section 36, registration rollers 37, a conveyance belt 38, a fixing section 39, a reversing section 40, a copy receiver 41, and the like.

Note that a power supply unit, various drive motors, drive force transmission mechanisms, various sensors, a control unit, etc. are not illustrated.

The basic operation of this copying machine is as follows.

That is, first, the photosensitive drum 21 is rotated in the direction of the arrow in response to a copy command, etc., but the drum is rotated before rotation to prevent residual toner adhering to the drum and uneven potential on the drum from reaching the charger 22 and the developing unit 24. eraser 23, pre-transfer charger 25, transfer charger 26,
Separation charger 27, cleaning unit 30. and drives the static elimination lamp 31 and the like.

The cleaning unit 30 operates under the condition that the power of the copying machine is turned on, so that the drum surface potential after passing through the static elimination lamp 31 becomes 0■ even after a jam occurs.

Note that the leading edge of the latent image formed on the photoreceptor drum 21 is the portion after the position passing the cleaning device 30 .

When the photosensitive drum 21 is rotated to a fixed position by being driven by a main motor (not shown), the document set on the contact glass 17 is illuminated by an illumination unit consisting of a halogen lamp 18a and a first mirror 18b in synchronization with the rotation. (scanning system) 18, and the reflected light image is the first mirror 18b1, the second mirror 1'lla, the third mirror 19b, and the frame L.

- An image is formed on the photosensitive drum 21 via the lens 20 and the fourth mirror 19C.

After the photosensitive drum 21 is charged by a charger 22, an eraser 23 irradiates unnecessary parts with light to create an image frame suitable for the transfer paper or projected image. A latent image is formed by the above-mentioned reflected light image that is incident on the image via the exposure optical system.

At this time, it goes without saying that the rotational speed of the photosensitive drum 21 and the scanning speed of the illumination unit 18 are made to match in order to obtain an image (latent image) that is the same size as the original.

The electrostatic latent image on the photoreceptor drum 21 is developed (visible) as a toner image by the developing unit 24, and the change in image 'a' is adjusted by the potential applied by the developing unit 24 at this time.

First tray 33 or second tray 34 or third tray 42
The transfer paper inside is first transferred to the paper feed roller unit 35a or 35.
b or 35d, the paper is sent to a point where a paper detector (not shown) is activated.

Next, at the predetermined paper feeding timing, the paper feeding roller unit 3
5a or 35b, the transfer paper of the required size is sent through the vertical conveyance section 36 to the registration roller 37 that has been stopped in advance, and the registration roller is moved at the timing when the leading edge of the toner image on the photosensitive drum 21 and the leading edge of the transfer paper match. 37 is driven.

The transfer paper is transferred to the photosensitive drum 21 by the registration roller 37.
When the toner image on the photosensitive drum 21 is transferred to the transfer paper by the transfer charger 26, the toner image is transferred to the transfer paper.

Although the surface of the photoreceptor drum 21 is very smooth and the adhesion of the transfer paper is strong, the transfer paper is separated from the photoreceptor drum 21 by the action of the separation charger 27 and the separation claw 28, and then transferred to the fixing section by the conveyor belt 38. Sent to 39.

Then, the fixing section 39 applies heat and pressure to the toner to fuse and fix the image, and then the transfer paper on which the image is formed is discharged to the copy receiver 41 via the reversing section 40 .

Since a small amount of toner remains on the surface of the photoreceptor drum 21 after transfer, the pre-cleaning charger 29 is applied, the cleaning unit 30 cleans the surface with a brush and a blade, and the next charge removal lamp 31 removes the surface potential. Keep constant.

Note that for double-sided copying, after an image is formed on one side, it is stacked on the double-sided tray 32 with the image side facing up via the reversing unit 40, and the paper is fed by the paper feeding roller unit 35c at a predetermined feeding timing. This is done by printing it on paper.

The sequence control of the copying process described above is performed by a control section, which will be described later, mainly based on pulses generated in synchronization with the rotation of the photoreceptor drum 21 or reference pulses for driving the photoreceptor drum 21.

Next, a paper feeding device capable of parallel conveyance in this embodiment will be explained.

First, an example will be described in which two paper feeding devices, the first tray 33 and the second tray 34, are used.

In the case of a normal copying operation, transfer sheets are sent out one by one from a tray selected from the first tray 33 and the second tray 34 with respect to the reference position A as shown in FIG.

In this embodiment, there are two sheets of transfer paper, but when sending out multiple transfer sheets at the same time, it is necessary to print the transfer sheets 50 and 51 in parallel with a gap δ as shown in FIG. ,
The transfer paper 50 is fed from the first tray 33, and the transfer paper 51
Assuming that paper is fed from the second tray 34, the sectors of the transfer paper 50 and 51 in the first tray 33 and the second tray 34 are as shown in FIG. In the same manner as above, set the transfer paper 50 using the reference position A as a reference. However, the second tray 51 will be set.

As a method for setting the transfer paper 51 at the reference position fiB, there is a method using a simple cassette 52 shown in FIG. A partition plate 53 is erected on this simple cassette 52 so that when the simple cassette 52 is set on the second tray 34, the partition plate 53 is located at a reference position B.

The second tray 34, on which the above-mentioned simple cartridge 52 can be set, has a first tray used during normal copying operations.
In addition to the paper feed roller unit 35a shown in the figure, a paper presence/absence detection unit, a paper size detection unit (not shown), etc., a paper feed roller unit 54 and a paper presence/absence detection unit 54 used when the simple cassette 52 is set are provided. It is necessary to provide a detection section, etc.

The simple cassette 52 shown in FIGS. 5 and 6 has holes 55.5 in left and right chambers formed with the partition plate 53 as a boundary.
6, these holes 55 and 56 are provided at positions corresponding to the paper presence/absence detection section provided in the paper feeding device consisting of the second tray 34.
! 91- +/ I Q A L- * Fn r Beak 1tl 77 a Side guide 57 provided movably
The cassette 52 contacts the end surface of the transfer paper stored in the second tray 34 during normal copying operation, and contacts the end surface of the simple cassette 52 when the simple cassette 52 is set. The paper size detection when the simple cassette 52 is set is determined by the paper size detection by the side guide 57 and the out-of-paper signal from the paper presence/absence detection section corresponding to the hole 55. Further, a paper presence/absence detection section corresponding to the hole 56 detects the presence or absence of paper when the simple cassette 52 is set.

General paper size detection using the side guide 57 is performed using a configuration as shown in FIG. That is, the paper size is changed by grasping the stopper lever 58 of the side guide 57 and sliding it back and forth.

A shield plate is screwed to the guide lever bracket 59, and the size detection base vi60 (7
) Eight types of sizes are displayed by turning the four photosensors 61 ON-OFF.

The stopper lever 58 presses down the side guide 57 due to the spring force between it and the side guide 57, so that the side guide 57 can be set at any desired position. For this reason, the shaft 57 is specially treated to increase its hardness and coefficient of friction, thereby preventing the stopper lever 58 from slipping.

Furthermore, to explain the first tray 33 as an example of determining a specific paper size using the configuration shown in FIGS. A pair of paper presence/absence detection devices 63 and 64 are provided in the forward direction of this side guide 57.

As an example, FIG. 10 shows the relationship between the paper presence/absence detection devices 63 and 64 and the paper size in the case of A row of transfer paper.
FIG. 11 shows the relationship between the paper presence detection W263.64 of the transfer paper in row B and the paper size. In FIG. 1O, the dashed line represents A5, the dashed line represents A4, and the chain double-dashed line represents A3. In FIG. 11, the dashed line represents B6, the dashed-dotted line represents B5, and the chain double-dashed line represents B4.

In FIG. 10, A5. A4. When A3 is placed horizontally, each size signal is output according to the movement of the side guide 57. Therefore, if A4 is placed vertically, the size signal will be A5, but the presence/absence detection device! The size and horizontal and vertical directions can be determined in relation to the output of 63.64. The table below shows the relationship between specific signals and sizes for which similar determinations were made for the transfer paper in row B.

Next, an embodiment will be described in which parallel conveyance is possible using one paper feeding device.

That is, it is a paper feeding device using the third tray 42 shown in FIG.
This is the configuration shown in Figure (to)). This third tray 42 is divided into two chambers with a partition 65 erected approximately in the center. Transfer paper is loaded in each chamber, and when set in the copying machine main body 12, the transfer paper standard are the reference positions A and B, respectively. In addition, each of the chambers is provided with an independent bottom plate 66a, 66b.
and springs 67a and 67b are arranged, and the spring 67
a.

67b presses the bottom plates 66a and 66b upward. Furthermore, when the third tray 42 is set in the copying machine main body 12, the paper feed rollers 35d and 68 provided in the main body 12 are arranged at positions corresponding to each transfer paper, so the bottom plates 66a and 66b are placed in the position corresponding to each transfer paper. Thickness of P (total height)
Accordingly, they are pressed by springs 67a and 67b, and parallel conveyance becomes possible.

By the way, one of the problems when sending out multiple transfer papers at the same time is the problem of aligning the leading edges of each paper.
For example, when using the two paper feeders described above, the first
In the figure, two paper feeding devices, the first tray 33 and the second tray 34, are used, but the two sheets of transfer paper are transferred to the transport roller 569.
They will match in that part. Therefore, it is conceivable to shift the paper feeding timing from the first tray 33 and the paper feeding timing from the second tray 34 so that the leading edge of the transfer paper coincides with each other.

Further, in order to more accurately align the leading edge of the transfer paper, the conveyance roller 69 may be controlled in the same way as the registration roller 37 is controlled.

That is, the conveyance roller 69 moves the first and second trays 33 .
It is stopped until the paper fed from 34 arrives,
Rotation is started at a predetermined timing when the paper is completely gripped by the conveying roller 69.

By doing this, the leading edges of the two sheets of paper are conveyed almost in alignment.

Using this method, more accurate tip alignment can be achieved than in the embodiments described above. On the other hand, it can be said that even if the accuracy of the paper feeding timing adjustment is made more rough, it is possible to easily align the leading edge.

Furthermore, the joining point of the two sheets of transfer paper may be the registration roller 37. In other words, a path is taken such that the two sheets of transfer paper meet for the first time at the registration roller 37.

That is, in FIG. 1, parallel conveyance may be performed using two paper feeding devices: the paper feeding device of the third tray 42 and the paper feeding device of the first tray 33 or the second tray 34.

It is also possible to set the rotation timing of the conveyance roller 69 to the timing when the leading edge of the paper coincides with each other, and in this case, the registration roller 37 will have the function of a normal conveyance roller.

On the other hand, in the case where only the third tray 42 is used for parallel conveyance, the two paper feed rollers 35d and 68 are operated at the same timing, and the registration rollers 37 are further aligned to align multiple paper feed rollers 35d and 68. The leading edge of the transfer paper can be aligned.

Another problem when conveying a plurality of transfer sheets in parallel is that if the transfer sheets overlap each other, it causes skew, jam, and wrinkles.

However, it is almost impossible to convey two sheets of transfer paper so that the gap between them is zero and they do not overlap.

Therefore, as shown in FIG. 3, it is preferable to set the reference positions A and B so that there is a gap δ from the beginning.

In this case, the image on the transfer paper will be shifted by δ from the original, but this is not a big problem if δ is made sufficiently small.Also, when making copies of books, etc., the image on the transfer paper will be shifted from the original by δ. This is the part that doesn't exist.

When copying two originals by conveying them in parallel, it is also possible to shift them by δ on the platen.

If you really want to reduce the deviation from the original, use the transfer paper reference for normal copying, position A in FIG. 13, and the transfer paper reference for parallel copying, shown in FIG. 14.

That is, if position A in FIG. 13 and position A' in FIG. 14 are the same, transfer paper N has the same reference as the original, but transfer paper M is shifted by δ. However, for example, if position A' in FIG. 14 is shifted from A by δ/2,
The amount of deviation of both the transfer sheets N and M from the original is δ/2.

Next, the branching section 100 that performs transfer paper reversal and paper ejection switching will be described based on FIGS. 15 to 18.

Figure 15 shows the state in which the transfer paper is sent to the paper discharge section X.
When the transfer paper P that has passed through the fixing section (not shown) is fed into the reversing section Y, it is guided between the main reversing roller 72 and the rear reversing roller 73 by the upper switching claws 70b and 71b of the temporary reversing switching guide 70, 71, and is guided by the branching claws. The paper is sent to the paper discharge section X by 74.

FIG. 16 shows the operating states of the reversing switching guide plates 70, 71 and the branch claws 74, and FIG. 17 shows the state in which the transfer paper P is reversed and fed to the double-sided paper feed section
is substantially integrated with the upper switching claw 71b and the lower switching claw 71a, and is normally biased by a spring 75 to the state shown in FIG. In FIG. 16, when the solenoid 76 is sucked in the direction of the arrow, the lower switching claw 71b
is located on the transfer conveyance path, and the transfer paper is guided to the reversing section Y. At the same time, when the switching solenoid 77 of the branch claw 74 is sucked in the direction of the arrow, the branch claw 74 operates around the shaft 78 via the lever 79, and the transfer paper sent from the reversing section Y is guided to the double-sided paper feed section Z. .

Here, the reversal switching guide plates 70 and 71 and the branching claw 74 are divided into two in the axial direction, and are constructed so that they can each operate independently with respect to the two sheets of transfer paper being conveyed.

The reversal switching guide plate 71 is integral with the rotating shaft 80 and is the 16th
As shown in the figure, it can be moved to two positions by a solenoid 76 and a spring 75, and similarly, the reversal switching guide plate 70 is integrated with a rotary tube 81 and has a solenoid and a spring (not shown) (a side plate to which the solenoid 76 and spring 75 are attached). The reverse switching guide plates 70 and 71 can each be moved independently.

Similarly, the branch claw 74 can be moved independently to the front side and the back side by the branch claw rotating shaft 78 and the tube 82.

In addition, 83, 84, 85, 86, 87 in the figure are guide plates, 8
8 is a front reversing roller, and 89 is a return spring for the branch claw 74.

Figure 18 shows a state in which A4 and B5 sheets are passed in parallel.
For BS, when A4 size transfer paper is sent in parallel, the front switching claw 70 is placed inside the B5 width, and the back switching claw 71 is used to transfer A4 size parallel transfer sheets of A4' width. Since the switching claws are arranged on the inside, sheets fed in parallel by the operation of the switching claws can be sent separately to the paper discharge section and the reversing section. In addition, δ in FIG. 18 indicates a predetermined gap between the sheets conveyed in parallel. From 0 or more, one of the two sheets of transfer paper fed in parallel is sent to the paper ejecting section, and the other is sent to the reversing section. This is possible by controlling the respective switching solenoids 76 and 77 to Y and double-sided paper feed section Z.

Some transfer paper is conveyed to a duplex tray, but the duplex tray has two paper feed rollers for parallel conveyance, similar to the paper feed section, and each of them is driven and controlled independently.

Further, in parallel conveyance in which a plurality of copies are simultaneously made as in the present invention, there is also a problem in paper ejection. This method has the advantage that copies can be made in a short time by using it when multiple sheets of originals are the same or when the order of copying is not important.

However, each set of originals is different, and
If you want to arrange them in that order, this cannot be done as is, and the following can be considered as a means to solve this problem.

A) Change the ejection timing of each copy.

1) Change the transport route.

(Including putting it in a double-sided tray) 2) Change II feed speed.

口I Hk 1 し・-＾拮MUえい; 連）Rock the paper output tray.

2) Change the roller diameter of the paper ejection transport roller in a certain direction to align the width of the copy when ejecting it.

Further, when double-sided page continuous copying of a book manuscript or the like is performed, copies are alternately ejected to the front side and the back side for each copy, as will be explained later (control section). In this case as well, the above formula allows the pages to be aligned and is effective.

Hereinafter, a specific example of the above-mentioned paper discharge section 140 will be described based on the drawings.

In the embodiment of the paper discharge section 140 shown in FIGS. 19 to 23, a swing output gear 91 is fixed to the lower part of the paper discharge tray 90, and a swing output gear 91 is driven to rotate by a reverse motor 92. The input gear 93 is brought into mesh. 94 is Accuride.

With such a configuration, the pre-transfer paper P, which is conveyed in parallel,
Depending on the paper ejection timing, the transfer paper size, or the outer shape 95 of the copying machine body, etc., the transfer paper Pt and the post-transfer paper Pt are overlapped on the paper ejection tray 9o. - Enables movement over a fixed distance (in the direction of arrow W). Therefore, as shown in Figure 22.23,
Position the paper discharge tray 90 at the paper discharge portion of the front transfer paper P1,
Next, by moving the paper discharge tray 90 to the paper discharge portion of the post-transfer paper P, the transfer papers can be stacked one after another.

In the above configuration, the swinging force is transmitted by the gears 91 and 93, but a timing belt, a link mechanism, etc. can also be used.

Next, in another embodiment of the paper discharge section 140 shown in FIGS. 24 and 25, a transfer paper stacking mechanism is arranged in the conveyance path between the branch section 100 and the paper discharge tray 101.

That is, the guide plates 102a and 102 forming the conveyance path
An auxiliary guide plate 105 that is rotatably driven around a shaft 104 by a solenoid 103 is disposed in the middle of b.

Further, the paper discharge tray 10 of the guide plates 102a and 102b
On the 1 side, there are a paper ejection drive roller group 106 and a paper ejection driven roller group 1.
07, and above the roller groups 106 and 107, auxiliary guides 108a and 108b are formed to guide the transfer paper guided upward by the auxiliary guide plate 105,
The paper output tray 10 of these auxiliary guides 108a and 108b
A second paper ejection drive roller group 109 and a second ejection driven roller group 110 are provided on the first side. This second discharge drive roller group 1
09, in this embodiment, the diameter of each roller becomes smaller from the back (R side) to the front (F side), and conversely, in the second ejecting driven roller group 110, the diameter of each roller becomes smaller from the back to the front. The diameter is made larger. Also 111. L12
is a spring that holds the auxiliary guide plate 105 in place.

Therefore, the front transfer paper P1 is transferred to the lower paper ejection drive roller group 1.
06 and the paper ejection driven roller group 107, the paper is ejected straight, and the transfer paper P! is guided to auxiliary guides 108a and 108b by an auxiliary guide plate 105 that is rotated counterclockwise by a solenoid 103. Then transfer paper P
, is transported tilted toward the transfer paper P1 direction due to changes in the acting force caused by changes in the roller diameters of the second wandering paper drive roller group 109 and the second wandering driven roller group 110, and the second
As shown in FIG. 6, the transfer paper P2 is discharged so as to be obliquely superimposed on Pl.However, since the transfer papers P, , P, are superimposed in the same order, there is no particular problem.

Furthermore, by adjusting the roller diameters of the second ejecting driving roller group 109 and the second ejecting slave roller group 110 appropriately, as shown in FIG. 27, one transfer sheet P2 is ejected first. The paper output tray 101 is placed at a 90 degree angle to the paper P+.
It is also possible to have it stocked.

Further, as in the sheet discharge section 140 shown in FIG.
Wandering driving roller group 109 and second Wandering driven roller group 110
is made to have the same width as the paper ejection drive roller group 106 and the paper ejection driven roller 107, and the diameter of each roller of the second ejection drive roller group 109 is gradually changed from approximately the center toward the back and front. By gradually decreasing the diameter of each roller of the second ejecting driven roller group 110, if necessary, the transfer paper P+ on the front side can be used in the same manner as the transfer paper P2 on the rear side. Auxiliary guide 108a with auxiliary guide plate 105
, 108b, allowing the vehicle to change direction at right angles to the direction of travel. As a result, as shown in FIG.
1 and PO are ejected.

Further, the embodiment of the paper ejection unit 140 shown in FIGS. 30 and 31 is constructed focusing on the paper ejection drive roller 120 and the paper ejection driven roller 121. The roller diameter df of the roller is made larger than the roller diameter d8 of the rear (R side) paper ejection drive roller, and the roller diameter dR of the rear paper ejection roller drive roller becomes smaller from the front d to the back d. d,<d, or l (R>1), and the roller diameter of the paper ejection drive roller 120 is set as dll'<d.
d.1. I<d, and the diameter of each roller of the paper discharge driven roller 121 was determined in accordance with the paper discharge drive roller 120.

Therefore, the transfer paper on the front side is ejected quickly, and the transfer paper on the back side is delayed from the timing of ejection of the transfer paper on the front side, and due to the change in the roller diameter d8, the transfer paper on the back side is transported somewhat in the direction of the transfer paper on the front side. , it is ejected partially overlapping the transfer paper in the foreground.

Next, when using continuous page copying and double-sided copying, that is, when copying books using the functions of parallel conveyance and double-sided copying, the originals shown in FIGS. 1
This will be explained with reference to an explanatory diagram showing the relationship between the transfer paper 30 and the transfer paper 131. In this example, the transfer paper 131 uses a means for changing the direction of the transfer paper using the auxiliary guide plate 105 and the auxiliary guides 108a and 108b described above, and ejecting the transfer paper so that it is overlapped on the paper ejection tray. do. Also the 32nd
Figure fal, (bl, (C1 shows an example where the manuscript 130 has an odd number of pages and the last page is page 5, and Figure 32 (a)
, (dl is an example where the manuscript 130 is an even number of pages, and the last page is 4.
The case of page is shown. In the figure, original 130 and transfer paper 1
The numbers above 31 indicate the number of pages, and if the page is the front, it is indicated by a solid line, and if it is the back, it is indicated by a broken line, and "front" is the front edge of the transfer paper 131. It shows. Furthermore, in the figure, the vertical side of (A) shows the state of the original 130 on the contact glass 132, the vertical side of (B) shows the state of the transfer paper 131 in the copy state, and the vertical side of (C) shows the state of the original 130 on the contact glass 132. (d) describes the state of the transfer paper 131 at the branching part, and (d) describes the state of the transfer paper 131 in the double-sided tray.
(e) shows the state of transfer paper 1 in the paper output tray.
31 states are shown respectively. Transfer paper 131 with two-dot chain line
indicates the state before the direction change.

First, in FIG. 26 (jl), contact glass 1
32, a book manuscript 130 is placed in a double-page spread state and with the manuscript 130 facing downward.

Then, by the parallel conveyance described above, the first, second,
Two sheets of transfer paper 131a, 131b are fed from either the third tray 33, 34.42 and undergo a known transfer operation. Then, the transfer paper 131a on which the first page has been copied is ejected as it is to the paper ejection tray, and the transfer paper 131b on which the second page has been copied is sent to the branching section 100, and the two-sided transfer paper 131a is transferred to the back side. It is sent to the tray 32.

After that, as shown in Fig. 26 (mountain), the contact glass 132 is
Place the next double-page spread, that is, 3.4 pages of original document 130, with the front end facing upward from the state shown in FIG. 26 (al).

Then, by parallel conveyance of the transfer paper, a new transfer paper 131c is created.
The transfer paper 131b sent from the duplex tray 32 undergoes a transfer operation, and the transfer paper 131b on which both sides have been copied is ejected as is to the paper output tray, while the transfer paper 131C on which 4 pages have been copied on one side is branched. After being sent to the section 100, it is sent to the double-sided tray 32.

Next, as shown in FIG. 26 (C1), the contact glass 132
Place the original 130 with the front end on top in the same manner as in FIG.

Then, five pages are copied onto the back side of the transfer paper 131C fed from the duplex tray, and the paper is ejected as is to the paper ejection tray.

In addition, Fig. 26+d) shows the case where the last page is 4 pages,
Unlike FIG. 26 [bl], there is no need to send the transfer paper 131c to the double-sided tray, but it is simply reversed at the branching section 100 and discharged to the paper discharge tray.

The operation of the above-mentioned FIGS. 26+a) to 26(dl) will be explained later in detail. As described above, the sheets are discharged in an overlapping state, which is advantageous during bookbinding.

The flowchart in FIG. 33 shows that the copy size A4 is sent to the first paper feeder. This operation can only be performed when the BS transfer paper is set in the longitudinal direction relative to the paper feeding direction, and the transfer paper is set in the cassette inside the second paper feeder in the same size and direction as the first paper feeder. Turn on the “parallel transport” possible indicator in the department. In other words, in the first paper feeding device, paper presence/absence detection 1.2 is ON (
(Giyu), and the size detection outputs A5 (or BS).

Paper presence/absence detection 1 OFF in the second paper feeder (Gion),
The parallel conveyance display lights up only when the paper presence/absence detection 2 is ON (paper present) and the size detection is outputting A3 (or B4).

The flowchart in Figure 34 is the "parallel conveyance display" in the operation section.
When lit, after pressing the "parallel conveyance" key, there is a difference in copy mode selection depending on whether or not the "original" key is input.Also, depending on the set magnification and original size, the copy size will change to A3. “Parallel conveyance” is displayed on the display only when B4 is selected.

Figures 35 and 36 are flowcharts respectively showing the copying operation when one original key is input or not when double-sided parallel conveyance is selected. You can set the copy mode for each original by inputting it. Further, the LAST key is a key for ejecting the transfer paper fed from the paper feeder and the duplex tray to the paper ejection tray by key input during double-sided copying, and is effective when copying the final original.

The timing chart in Fig. 37 shows the paper feeding timing when there is no original key input during parallel conveyance double-sided copying, and when the first copy of the original is copied, the transfer paper is ejected to the paper ejection tray once, and the transfer paper is transferred twice, and then the paper is transferred twice. Eject the paper to the duplex tray 0 Next, copy the second original, eject the 3-page transfer paper (2-page transfer on the back) to the output tray, and transfer the 4-page transfer paper to the duplex tray. After ejecting the paper, repeat this process, and after inputting the LAST key, the paper is fed from the paper feeder, the N+2 page transfer paper, and the paper is fed from the duplex tray.
The +1st page transfer paper (the Nth page is transferred on the back side) is ejected to the paper ejection tray.

FIG. 38 shows a plan view of the operation unit 200.Next, the keys and displays on the drawing will be explained by writing the symbols shown in the drawing inside the box.

0 to 9 (201) Copy number set, original number set, zoom magnification set C (202) Mode clear key S (2
03) Copy operation interruption key zoom (206)
Arbitrary magnification selection key double-sided (208) Double-sided copy key composition (209) Copy key inversion on the same copy side (
210) Paper ejection side selection key Print key (211)
? 3 [Copy start key Parallel transport (212) Parallel transport selection key Parallel transport display (213) Parallel transport possible display element display section (214) Mode and display for user operation Original (215) Copy mode for front and rear originals Selection key Original size key (216) Original size input key - LAST
(217) Original last page confirmation key FIG. 39 is a block diagram of the control system, and the main control section 3
00, a sensor system 301 such as a paper presence detection section and a paper size detection section is connected via an I boat 302, and the aforementioned operation section 200 is also connected to the main control section 300. A driver unit 305 and a load system 30 are connected from the main control section 300 via an O-boat 304.
6.

Finally, we will discuss jam handling during parallel conveyance.

Normally, when a jam occurs in a copying machine, the copying operation is interrupted, but in the alternate mode copying of the present invention, when a jam occurs on one conveyance path, the jam location is considered to have no effect on other copying operations. If the problem occurs in the area where the problem occurs, other copying operations will continue.

Here, the unaffected jam location refers to a paper feed downward jam in the paper feeder/double-sided tray, or a paper ejection failure jam in the paper ejection unit.

In the flow of the 40th part (al, (b)), it is assumed that the paper is fed down and the paper is ejected incorrectly at branch B and branch E, respectively.

If the paper feed sensor is ON when paper passes, it will be ON after paper feeding operation.
do. Also, the paper ejection sensor is located at the paper ejection exit, and when paper passes
Do N.

FIG. 41 is a flowchart showing control based on jam content.

As mentioned above, Fig. 40(a), (B, E in bl)
In case of other jams, the copying operation on one side is continued, but at this time, the erase on the side where the jam occurs is turned on to prevent development on the photoreceptor.

〔effect〕

Since the present invention is configured as described above, it is capable of supporting various copying modes, improving copying work efficiency, and also enables parallel conveyance, which allows mode settings to be made using a dedicated key when copying documents in different modes at the same time. It is possible to provide a type copying machine.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic diagram of the entire copying machine, FIG. 2 is a diagram illustrating the size of transfer paper, and FIG. 3 is a plan view showing the state of transfer paper being conveyed in parallel. , FIG. 4 is a plan view illustrating the positional relationship between the transfer paper and the tray that are conveyed in parallel, and FIG. 5 is a perspective view showing a simple cassette for parallel conveyance.
FIG. 6 is a perspective view showing the relationship between the simple cassette and the tray shown in FIG. 5, FIG. 7 is a schematic explanatory view of the configuration of the side guide, FIG. Figure 9 is a sectional view of Figure 8, Figures 10 and 11 are diagrams showing the relationship between the paper presence/absence detection device and the paper size, and Figure 1
Figure 2 (al is a perspective view showing the third tray, Figure 12 (bl)
is a sectional view of the third tray, FIGS. 13 and 14 are diagrams illustrating the positional reference in conveying the transfer paper, and FIGS. 15 and 16 are
Fig. 17 is a partially sectional front view showing the operating state of the branching section, Fig. 18 is a side view illustrating the relationship between the switching claw and each size of transfer paper, and Figs. 19 to 23 are paper ejection. The first embodiment of the tray alignment mechanism is shown, FIG. 19 is a plan view, and the second embodiment is shown in FIG.
0 is a front view, FIG. 21 is a side view, FIGS. 22 and 23 are explanatory plan views showing the operating state, and FIGS. 24 to 27 show a second embodiment of the alignment mechanism. Figure 24 is a front view, Figure 25 is a side view showing the roller group, Figures 26 and 27.
FIG. 28 is a side view of the roller group of the third embodiment of the alignment mechanism, FIG. 29 is a diagram showing the transfer paper being discharged, and FIG. 30 is a diagram showing the transfer paper being discharged. FIG. 31 is a side view showing the roller group of the fourth embodiment, FIG. 32 ia), FIG. 32 mount), FIG. 32(e), FIG. 32 ! dl is a diagram explaining the operational relationship between the original and transfer paper when copying a block object, FIG. 33 is a flowchart when displaying parallel conveyance, FIG. 34 is a flowchart showing a state in which parallel conveyance is disabled, and FIG. 35 , 3rd
FIG. 6 is a flowchart showing the operation of transferring a document key input without time, FIG. 37 is an operation timing chart of the paper feeding device,
Fig. 38 is a plan view of the operation unit, Fig. 39 is a block diagram of the control unit, Fig. 40 (al, (bl) is a flowchart showing paper jam check for paper feeding and paper ejection, and Fig. 41 is a control operation depending on the content of the jam. 32.33, 34.42... paper feed section, 100...
・Branch section, 140...Paper discharge section, 300, 301°3
02.304...Control unit. 12 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 9 Fig. 10 Fig. 1/Fig. 15 Fig. 16 Fig. Y Fig. 77 and Fig. 18 Fig. 79 Fig. 20 Fig. 21 Fig. 22 Fig. 3 Fig. 24 Fig. 26 Fig. 27 Fig. 9 Fig. 30 Fig. 31

Claims (1)

[Claims] Different originals can be placed on the front and back sides of the contact glass, and two sheets of transfer paper corresponding to these originals can be conveyed in parallel from multiple paper feeders or a single paper feeder divided into two. This is a copying machine that allows you to set modes such as the number of copies, double-sided, inversion, and composition for each document on the front and back sides by inputting the original key, and when performing parallel copying operations, it is possible to set the mode such as copying number, duplex, reversing, combining, etc., by inputting the original key. If the spot is one where there is no problem with subsequent copying on the other transfer paper, continue copying and erase the untransferred side to prevent development on the photoreceptor. This is a parallel conveyance type copying machine.