JPS61188356A - Parallel transfer type copying machine - Google Patents

Abstract

PURPOSE:To make it possible to cope with various copying modes, by providing a control section for appropriately controlling a parallel transfer section, a branch section for reversing any one of image transfer sheets as it is necessary and a discharge section for stacking and storing the image transfer sheets. CONSTITUTION:A document 103 in the form of a book which is spreaded and faces downward is set on a contact pane 132, and two image transfer sheets are fed from any of first to third trays to be subjected to an image transfer operation. Further, a control section discharges an image transfer sheet 131b on which the first page has been transferred, directly to a discharge tray, and further discharges an image transfer sheet 131b on which the second page has been transferred, into a bisurface copying tray. Thereafter, a document for the third and fourth pages are set with the front end is reversed, and the image transfer sheet 131b having both surfaces copied is discharged directly to the discharge tray while an image transfer sheet having only one surface copied with the fourth page is fed into the bisurface copying tray through a branch section. Subsequently, the same steps are repeated, and the image transfer sheets are discharged, finally in such a condition that the sheets are stacked on the discharge tray.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a copying machine having a function of conveying transfer sheets in parallel.

[Prior art]

Conventionally, the basic idea of conveying paper in parallel has already existed in printing presses.

However, there has been no system that incorporates various controls and functions for parallel conveyance. For example, the page continuous copying function is one of the usage methods that best matches parallel conveyance, but It is necessary to configure a branch section or a paper ejection section.

〔the purpose〕

When applying parallel conveyance of transfer paper to a copying machine, an object of the present invention is to provide a parallel conveyance type copying machine that systemically handles parallel conveyance.

〔composition〕

In order to achieve the above object, the present invention has a paper feed section that can convey transfer sheets in parallel, a branch section that inverts one of the transfer sheets as needed, and a paper discharge section that stores the transfer sheets in an overlapping state. and a control section that appropriately brakes the paper feeding section, the branching section, and the paper discharging section.

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 a copying machine shown in FIG.
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, charger 22 arranged along its periphery, eraser (erase lamp) 2
3. Developing unit 24, pre-transfer charger (PTC) 2
5, transfer charger 26, separation charger 27, separation claw 28, pre-cleaning charger (PCC) 29, cleaning unit 30, and static elimination lamp 31, double-sided tray 32, first tray 33, second tray 34, third tray 42, Paper feed roller units 353 to 35d, vertical conveyance section 36
, registration roller 37, conveyor belt 38, fixing section 39,
It consists of 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 is designed to operate 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 o■ 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 images are the first mirror 18b, the second mirror 19a, and the third mirror 19.
b, an image is formed on the photosensitive drum 21 via the through lens 20 and the fourth mirror 19e.

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 photosensitive drum 21 is developed (visible) as a toner image by the developing unit 24, and the image density 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, feed the paper again at the predetermined paper feeding timing)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.

The surface of the photoreceptor drum 21 is very smooth and the adhesion of the transfer paper is strong, but the transfer paper is separated from the photoreceptor drum 21 by the action of the separation charger 27 and the separation claw 2, and then fixed by the conveyor belt 38. It is sent to Department 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 then fed by the paper feeding roller unit 35c at a predetermined paper 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 reference to the reference position 18, as shown in FIG.

However, in the case where a plurality of transfer papers are sent out at the same time, although two sheets are used in this embodiment, it is necessary to send the transfer machines 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 the paper is fed from the second tray 34, the set of transfer paper 50, 51 in the first tray 33 and the second tray 34 is as shown in FIG. In the same manner as above, set the transfer paper 50 using the reference position A as a reference. However, in the second tray 34, the transfer paper 51 is set with reference to the reference position IB.

As a method for setting the transfer paper 51 at the reference position B, there is a method using a simple cassette 52 shown in FIG.

A partition plate 53 is installed upright on this simple cassette 52, and a second
When the simple cassette 52 is set on the tray 34, the partition plate 53 is positioned at the reference positions W and B.

Note that the second cassette 52 as described above can be set therein.
The tray 34 is equipped with a paper feed roller unit 35a, a paper presence/absence detection section, a paper size detection section (not shown), etc. shown in Figure 1, which are used during normal copying operations, as well as a simple cassette 52 set therein. Paper feed roller unit 54 used when
It is necessary to provide a paper presence/absence 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 detecting section provided in the paper feeding device consisting of the second tray 34. Also, the second tray 34
A side guide 57 is provided to be movable in the direction of arrow C.
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 a signal indicating that there is no paper corresponding to the hole 55 from the non-detection section. Further, corresponding to the hole 56, a paper presence/absence detection section 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 shielding plate is screwed to the guide lever bracket 59, and by turning on and off the size detection board 6004 photosensors 61 on the tray bottom plate.
Show seed size.

The stopper lever 58 acts as if it were holding 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 non-detecting devices 63 and 64 are provided in the advancing direction of the side guide 57.

As an example, FIG. 10 shows the relationship between the paper presence detection devices 63 and 64 and the paper size for the transfer paper in row A, and FIG. 11 shows the relationship between the paper presence detection devices 63 and 64 for the transfer paper in row B. The relationship between 64 and paper size is shown. In FIG. 1θ, the broken line indicates A5, the dashed line indicates A4, and the two points MklA indicate A3. In FIG. 11, the dashed line indicates B6, the dashed dot line indicates B5, and the dashed two dotted line indicates B4 transfer paper.

In FIG. 10, A5. B4. When A3 is placed horizontally, each size signal is output according to the movement of the side guide 57. Therefore, when A4 paper is placed vertically, the size signal becomes A5, but the size and the horizontal and vertical directions can be determined in relation to the outputs of the paper presence/absence detection devices 63 and 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 (b). 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. Further, bottom plates 66a, 66b and springs 67a, 67b are arranged independently in the chamber, and the spring 67
, a, and 67b press the bottom plates 66a and 66b upward. Further, when the third tray 42 is set in the copying machine main body 12, the paper feed rollers 35d and 6 provided on the main body 12
8 are arranged at positions corresponding to each transfer paper, the bottom plates 66a and 66b are pressed by springs 67a and 67b according to the thickness (overall height) of each transfer paper P, and parallel conveyance is achieved. 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 transported by the conveyance roller 69.
They will match in that part. Therefore, the timing of feeding the paper from the first tray 33 is adjusted so that the leading edge of the transfer paper is aligned.
It is conceivable to shift the paper feeding timing of the second tray 34.

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 is the first. second tray 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 completely.

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 conceivable that the rotation timing of the conveyance roller 69 is set to the timing when the leading edge of the paper is defeated, and in this case, the registration roller 37 will function as a normal conveyance roller.

On the other hand, in the case of parallel conveyance using only the third tray 42, the two paper feed rollers 35d and 68 are operated at the same timing, and the registration rollers 37 are set to further align the registration. You can align the leading edges of multiple transfer papers.

Another problem when a plurality of transfer machines are conveyed 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 relative to the original, but this is not a big problem if δ is made small enough.Also, when making copies of books, etc., the binding margin is This is the part where there is usually no image.

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

Also, if you really want to reduce the deviation from the original,
The transfer paper reference for normal copying, position A in FIG. 13, and the transfer paper reference for parallel copying, position A' in FIG. 14, may be shifted by a minute amount (less than δ).

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, then the transfer sheets N and M will each be shifted by δ/2 from the original.

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 reversing switching guide plate 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 state of the reversal switching guide plate To, 71 and the branching claw 74, and FIG. 17 shows the state where the transfer paper P is reversed and sent to the double-sided paper feed section Z.

The reversal switching guide plate 71 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 positioned on the transfer paper 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 lever 7
A branching claw 74 operates around a shaft 78 via a shaft 9, and the transfer paper sent from the reversing section Y is guided to a double-sided paper feeding 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 configured to be able to 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.
When BS or A4 size transfer paper is fed in parallel, the front switching claw 70 is placed inside the B5 width, and the back switching claw 7] is used to feed the A4 size parallel back transfer paper A4' width. Since it is located 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. Note that δ in FIG. 18 indicates a predetermined gap between sheets conveyed in parallel. As described above, it is possible to send one of the two sheets of transfer paper sent in parallel to the paper discharge section and the other to the reversing section Y and the double-sided paper feeding section Z by controlling the respective switching solenoids 76 and 77.

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 for simultaneously making a plurality of copies as in the present invention, there are 8 points in between when the paper is ejected. 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 fil sending route.

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

B) Integrate the output copies.

1) Swing the paper output tray.

2) Change the roller diameter of the paper ejection conveyance 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 method is effective because it enables page alignment.

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 front transfer paper P1 conveyed in parallel
and the post-transfer paper P2 are superimposed on the paper ejection tray 90 using constants determined by the paper ejection timing, the transfer paper size, or the outer shape 95 of the copying machine main body, etc.
The paper discharge tray 90 can be moved a certain distance (in the direction of arrow W). Therefore, as shown in Figure 22.23, the front transfer paper P
By positioning the paper ejection tray 90 at the paper ejection portion of P1 and then moving the paper ejection tray 90 to the paper ejection portion of the post-transfer paper P2, the transfer sheets can be stacked one by one.

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 plate 102a forms a 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 the guide plate 102b. Further, a paper ejection drive roller group 106 and a paper ejection driven roller group 107 are provided on the paper ejection tray 101 side of the guide plates 102a and 102b, and the roller groups 106 and 107 are guided upward by the auxiliary guide plate 105 above the roller groups 106 and 107. Auxiliary guides 108a and 108b are formed to guide the transfer paper, and a second ejection drive roller group 109 and a second ejection driven roller group 110 are provided on the paper ejection tray 101 side of the auxiliary guides 108a and 108b. In this embodiment, the diameter of each roller in the second ejecting driven roller group 109 decreases from the back (R side) to the front (F side). The diameter of each roller increases as it gets closer to you. Also -111.1
12 is a spring that holds the auxiliary guide plate 105 in a fixed position.

Therefore, the front transfer paper P1 is transferred to the lower paper ejection drive roller group 1.
06 and the sheet discharge driven roller group 107, and the transfer paper P on the back side is guided to the auxiliary guides 108a and 108b by the auxiliary guide plate 105 which is rotated counterclockwise by the solenoid 103. . Then transfer paper P
, are transported while tilting in the direction of the transfer paper P1 due to changes in the acting force caused by changes in the roller diameters of the second paper discharge drive roller group 109 and the second paper discharge driven roller group 110, and
As shown in FIG. 6, the transfer paper P, is discharged so as to be obliquely superimposed on the paper P+.

However, the transfer paper P1. Pt does not pose a particular problem because it is superimposed in the correct order.

In addition, by adjusting the roller diameters of the second paper ejection drive roller group 109 and the second wandering driven roller group 110, one transfer paper Pt is ejected first, as shown in FIG. The paper output tray 101 is placed at an angle of 90 degrees with respect to Pl.
It is also possible to have it stocked.

Further, as in the sheet discharge section 140 shown in FIG.
Wandering paper driving roller group 109 and second wandering driven roller group 110
is made to have the same width as the paper ejection driving roller group 106 and the paper ejection driven roller 107, and the diameter of each roller of the second paper ejection driving 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 wandering paper driven roller group 110, the transfer paper P on the front side and the transfer paper P on the back side can be used as necessary.

Similarly, the auxiliary guide 108 is connected to the auxiliary guide plate 105.
a, 108b, making it possible to change direction at right angles to the direction of travel. As a result, the transfer sheets P1 and P2 are discharged onto the paper discharge tray 101 in a state where they overlap each other, as shown in FIG. 29.

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 d of the roller is made larger than the roller diameter dl of the rear (R side) sheet discharge drive roller, and the roller diameter d of the odor sheet discharge roller drive roller is changed from front d to rear d. dR<dm++ (R>1), and the roller diameter of the paper ejection drive roller 120 is set as d,<d,
+.

<d, and the diameter of each roller of the paper discharge driven roller 121 was determined in accordance with this 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 d, the transfer paper on the back side is transported somewhat in the direction of the transfer paper on the front side. Therefore, the paper is ejected partially overlapping the transfer paper in the front.

Next, FIGS. 32(a) to 32(d) show the case of using continuous page copying and double-sided copying, that is, the case of copying books using the functions of parallel conveyance and double-sided copying. Manuscript 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 the auxiliary guide plate 105 and the auxiliary guides 108a and 108b described above to change the direction of the transfer paper, and ejects the transfer paper so that it is overlapped on the paper ejection tray. use. Also the 32nd
Figures (a), (b), and (c) show an example where the manuscript 130 has an odd number of pages and the last page is page 5;
(d) is an example where the manuscript 130 is an even number of pages, and the last page is 4.
In Figure 0, which shows the case of pages, original 130 and transfer paper 1
The number above 31 indicates the page number, and when the negative part is the front side, it is indicated by a solid line, and when it is the back side, it is indicated by a broken line, and "front" is the front edge of the transfer paper 131. It is shown that. Further, 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 (C)
The vertical side of (d) shows the state of the transfer paper 131 at the branch, the vertical side of (d) shows the state of the transfer paper 131 in the double-sided tray, and (e) shows the state of the transfer paper 131 in the paper output tray.
1 state is shown respectively. The transfer paper 131 indicated by a two-dot chain line shows the state before the direction change.

First, in FIG. 26(a), the contact glass 13
2, 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. Third tray 33
, 34. Two transfer sheets L31a, 1 from either of 42
31b is fed and subjected to a known transfer operation. 1
The transfer paper 131a on which the first page has been copied is ejected as is to the paper ejection tray, and the transfer paper 131b on which the second page has been copied is transferred.
is sent to the branching section 100 and sent to the double-sided tray 32 so as to be transferred to the back side.

After that, as shown in FIG. 26(b), the contact glass 13
26(a), and place the next two-page spread, that is, 3.4 pages of original 130, on top of the document 130, with the front end reversed from the state shown in FIG. 26(a).

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 13IC 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(C), the contact glass 13 is
26(a), and place the final page, in this case, page 5, on one side of the original 130, with the front end in the same manner as in FIG. 26(a). Then, five pages are copied onto the back side of the transfer paper 131G sent from the duplex tray, and the sheet is ejected as is to the paper ejection tray.

Moreover, FIG. 26(d) shows the case where the last page is 4 pages,
Unlike FIG. 26(b), 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 operations shown in FIGS. 26(a) to 26(d) described above are comprehensively controlled by a control section described later. Further, the transfer sheets 131 discharged to the discharge tray are discharged in an overlapping state as described above, which is advantageous during bookbinding.

In the flowchart of FIG. 33, copy size A4. Only when the B5 transfer paper is set in the longitudinal direction with respect to the paper feeding direction, and the transfer paper is set in the same size and in the same direction as the first paper feeder, into the cassette inside the second paper feeder. , lights up the "parallel transport" possible display in the operation unit. In other words, in the first paper feeding device, paper presence/absence detection 1 and 2 are O.
N (Giyu) and size detection outputs As (or B6).

In the second paper feeder, paper presence/absence detection 1 OFF (no paper)
, the paper presence/absence detection 2 is ON (Giyu), and the parallel conveyance display lights up only when the size detection is outputting A3 (or B4).

The flowchart in Fig. 34 shows the difference in copy mode selection depending on whether the "parallel transport display" in the operation section is lit, after the "parallel transport" key is pressed, and whether or not the "original" key is manually operated. The copy size is A3. B
Only at the time of 4, "parallel conveyance" is displayed on the display.

Figures 35 and 36 show the parallel conveyance both sides selected, respectively.
This is a flowchart showing a copying operation with and without manual input of the original key.The original key is effective when the front and rear originals are different in copying operation, and the copying mode of each original can be set manually using this key. In addition, the LAST key requires manual input when copying both sides, and the paper feed bag! and a key for ejecting the transfer paper fed from the double-sided tray to the paper ejection tray, and is effective when copying the final original.

The timing chart in FIG. 37 shows the paper feeding timing without manual input of the original key during parallel conveyance double-sided copying.
Eject the one-page transfer paper to the double-sided tray. Next, at the moment of copying the second sheet of the original, eject the three-page one-time transfer paper (two pages are transferred on the back) to the paper output tray. After ejecting the transfer paper for 4 pages to the duplex tray, this process is repeated, and after pressing the LAST key manually, the paper is fed from the paper feeder, the N+2 page transfer paper is fed from the duplex tray, and the N+1 page is fed from the duplex tray. The transfer paper (the back side has been transferred N times) is discharged to the paper discharge tray.

FIG. 38 shows a plan view of the operating unit 200. Next, the keys and displays on the drawing will be described with reference numerals shown in the drawing in parentheses.

0 to 9 (201) Copy number set, original number set, zoom magnification set C (202) Mode clear key 5 (20
3)? j [Sharing operation interruption key zoom (206>
Arbitrary magnification selection key on both sides (208) Double-sided copy key combination (209) Copy key inversion on the same copy side (2
10) Paper ejection side selection key Print key (211)
Copy start key Parallel transport (212) Parallel transport selection key Parallel transport display (213) Parallel transport possible display element display section (214)
Display original for mode and user operation (215) Copy mode selection key for front side and odor side originals 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, in which sensor systems 301 such as a paper presence/absence detection unit and a paper size detection unit are connected to the main control unit 300 via a port 302. The above-mentioned operation section 200 is also connected to the main control section 300.
connected to. The main control section 300 is connected to a driver unit 305 and a load system 306 via an O port 304.

〔effect〕

Since the present invention is configured as described above, it is possible to provide a parallel conveyance type copying machine that can support various copying modes and improve copying workability.

[Brief explanation of drawings]

The drawings show an embodiment of the invention, and FIG. 1 is a schematic diagram of the entire copying machine, FIG. 2 is a diagram explaining 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 the easy-to-use 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. FIG. 9 is a sectional view of FIG. 8, and FIG. 1O. Fig. 11 is a diagram showing the relationship between the paper presence detection device and the paper size, Fig. 12 (a) is a perspective view showing the third tray, Fig. 12 (b) is a sectional view of the third tray, Fig. 13 , 14th
The figure is a diagram explaining the positional reference in transporting the transfer paper.
5, 16, and 17 are partially sectional front views showing the operating state of the branching part, FIG. 18 is a side view illustrating the relationship between the switching claw and each size of transfer paper, and FIGS. 23 shows a first embodiment of the paper alignment mechanism of the paper output tray, FIG. 19 is a plan view, FIG. 20 is a front view, FIG. 21 is a side view, and FIG.
23 are explanatory plan views showing the operating state, and FIGS. 24 to 27 show a second embodiment of the paper alignment mechanism.
Figure 4 is a front view, Figure 25 is a side view showing the roller group, and Figure 2 is a front view.
6 and 27 are diagrams showing the transfer paper discharge state, FIG. 28 is a side view of the roller group of the third embodiment of the paper alignment mechanism, and FIG. 29 is a diagram showing the transfer paper discharge state. Fig. 30 is a front view showing the fourth embodiment of the paper alignment mechanism, and Fig. 31 is a front view showing the fourth embodiment of the paper alignment mechanism.
FIG. 32(a) is a side view showing the roller group of the embodiment. Fig. 32(b), Fig. 32(C), and Fig. 32(d) are diagrams explaining the operational relationship between the original and transfer paper when copying a book, and Fig. 33 is when displaying parallel conveyance. FIG. 34 is a flowchart showing a state in which parallel conveyance is disabled; FIGS. 35 and 36 are flowcharts showing the transfer operation when the document key is manually operated; FIG. 37 is an operation timing chart of the paper feeding device; FIG. The figure is a plan view of the operating section, and FIG. 39 is a block diagram of the control section. 32.33, 34.42...Paper feed section, 100...
・Branch section, 140...Paper discharge section, 300, 301°3
02.304... Control Department Agent Patent Attorney Take Kenji Department Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 9 Figure 10 Figure 11 Figure 12 Figure 12 of tσ (b ) Fig. 15 Fig. 16 and Fig. 19 Fig. 20 Fig. 2' Fig. 22 Fig. 23 Fig. 24 Fig. 26 Fig. 27 Fig. 9 Fig. 30 Fig. 31 tbto
/J/(-Figure 34 Figure 37 LAST

Claims (1)

[Claims] A paper feed section that can convey the transfer sheets in parallel, a branch section that inverts one of the transfer sheets as necessary, a paper discharge section that stores the transfer sheets in an overlapping state, and the paper feed section and the branch section. A parallel conveyance copying machine consisting of a paper discharge section and a control section that appropriately controls the paper ejection section.