JPS61192636A - Parallel feed copying machine - Google Patents

Abstract

PURPOSE:To enable copying speed to be increased with processing speed of printed image kept constant so as to save a vertical clearance of the copying machine by allowing one feed device to feed pieces of paper in parallel simultaneously. CONSTITUTION:A tray 12 is divided into two rooms with a partitioning plate 65 which rises approximately in the middle of it, and base plates 66a and 66b are pushed upward by means of each of springs 67a and 67b. Transfer paper is piled up in each of rooms, then, the tray 42 is set into the copying machine. The transfer paper is pressed up to feed rollers 35d and 68 which are arranged in the machine, with pressure which varies depending on the thickness of each of the piled paper allowing them to set for parallel feed. Thus, the transfer paper is fed in parallel allowing copying speed to be increased. This configuration enables the copying machine to save its vertical clearance where the transfer paper can be fed in parallel.

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, in order to increase the copying speed of copying machines, techniques have been developed in the direction of increasing the process speed.

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.

〔composition〕

In order to achieve the above object, the present invention is characterized in that one sheet feeding device (cassette, tray) simultaneously feeds sheets in parallel.

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 uses an automatic document supply bag capable of parallel conveyance, which will be described later. (hereinafter referred to as ADFF1a) 1
) and a copying machine main body 12.

The ADF device 1) 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 There is a mode in which documents are automatically conveyed onto the contact glass 17, a mode in which multiple documents set in the document setting section 15 are automatically conveyed one by one onto the contact glass 17, and the ADF device itself is used as a pressure plate. Can be used with mode. Also, this ADF device 1)
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 illumination unit 18 that includes a lamp 1) 3ai and a first mirror 18b and reciprocates in the direction of the arrow along the lower surface of the contact glass 17, and second to fourth mirrors 19a to 19c.
and an exposure optical system consisting of a through lens 20, a photoreceptor (selenium photoconductor), a drum 21, a charger 22 arranged along its periphery, and an eraser (erase lamp).
23, developing unit 24, pre-transfer charger (PTC)
25, Shinsha charger 26, separation charger 27, separation claw 28, pre-cleaning charger (FCC) 29,
Cleaning unit 30, static elimination lamp 31, double-sided tray 32, first tray 33, second tray 34, third tray 42, paper feed roller units 35a to 35b, vertical transport section 36, registration rollers 37, transport belt 38, fixing Part 3
9, a reversing section 40, a copy receiving section 41, and the like.

Note that illustration of a power supply unit, various drive motors, drive force transmission mechanisms, various sensors, control unit, etc. is omitted and denoted by υ.

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,
The separation charger 27, cleaning unit 30, static elimination lamp 31, etc. are driven.

The cleaning unit 30 operates under the condition that the copying machine is powered on, so that the drum surface potential after passing through the static elimination lamp 31 remains Ov 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 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 incident through 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 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 (visualized) 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.
The transfer paper of the required size is stopped in advance via the vertical conveyance section 36 by ha or 35b, and is fed to the registration roller 37, and when the leading edge of the toner image on the photoreceptor drum 21 and the leading edge of the transfer paper match, the registration roller is moved. 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 4°.

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 reference to the reference position ilA as shown in FIG.

However, if a plurality of transfer papers are sent out at the same time, although only two sheets are used in this embodiment, it is necessary to send the transfer papers 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 way 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 using the reference position B as a reference.

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 position B.

Note that the second cassette 52 as described above can be set therein.
The tray 34 is provided with a paper feed roller unit 35a) shown in FIG. 1 that is used during normal copying operations. In addition, it is necessary to provide a paper feed roller unit 54, a paper presence/absence detection section, etc., which are used when the simple cassette 52 is set.

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 3
4, a side guide 5 is provided movably in the direction of arrow C.
7 comes into contact with the end face of the transfer paper stored in the second tray 34 during normal copying operation, and comes into contact with the end face of this simple 5 cassette 52 when the simple force sector 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 unit 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 sliding the stopper lever 58 of the side guide 57 back and forth.

A shielding plate is screwed to the guide lever bracket 59, and by turning on and off the four photosensors 61 of the size detection board 60 on the tray bottom plate, the
Show seed size.

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, which is slidable while being guided.

As an example, Fig. 1θ shows the relationship between the paper presence detection devices 63 and 64 and the paper size in the case of A row of transfer paper.
Figure 1) shows the relationship between the paper presence/absence detection bags f63 and 64 of the transfer paper in row B and the paper size. In Fig. 10, the dashed line indicates A5, the dashed-dotted line indicates A4, and the dashed-dot line indicates A3; in Figure 1), the dashed line indicates B6, the dashed-dotted line indicates B5, and the dashed-double line indicates B4 transfer paper. be.

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, in the case of A4O portrait orientation, the size signal will be A5, but the size and 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. In addition, each of the chambers has an independent bottom plate 66a, 66b.
And spring 67! , 67b, 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, since the paper feed rollers 35d and 6B provided in the main body 12 are arranged at positions corresponding to each transfer paper, 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 feeding multiple transfer sheets at the same time is the problem of aligning the leading edges of each sheet. For example, when using the two paper feeders described above, In the first tray 33 and second tray 34. , and two paper feeding devices are used, but the two sheets of transfer paper coincide at the conveyance roller 69. Therefore, it is conceivable to shift the timing of paper feeding from the first tray 33 and the timing of paper feeding from the second tray 34 so that the leading edges of the transfer paper coincide.

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 6 minutes from the original, but this is not a big problem if δ is made small enough.Also, when making copies of books, etc., the image on the transfer paper will be shifted by 6 minutes from the original. 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 Figure 13, and the transfer paper reference for parallel copying, position A' in Figure 14, by a minute amount (
(smaller 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,
The amount of deviation of both the transfer sheets N and M from the original is δ/2.

Next, based on FIGS. 15 to 18, transfer paper (1)
; Salmon'Kl-rKHk MG)nm Cj乎A No.d
dGf! R1n n L-M 1.7 Explain.

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 70, 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 79
A branching claw 74 operates around a shaft 78 via the transfer paper fed from the reversing section Y to the 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 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.
In BS, when A4 size transfer paper is sent in parallel, the front switching claw 70 is placed inside the 85 width, and the back switching claw 71 is arranged to feed the A4 size parallel back transfer paper 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. Y, this is possible by controlling the respective switching solenoids 76 and 77 to the duplex paper feed section 2.

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.

In addition, in parallel conveyance where multiple copies are made at the same time as in the present invention, there are also problems in paper ejection.
□There is a problem. 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 Wi transmission route.

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

B) Integrate the output copies.

1) Swing 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 ejection section 140 will be described based on the same drawing.

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,
In order to overlap the post-transfer paper P2 and the post-transfer paper P2 on the paper ejection tray 90, the paper ejection tray 90 is − Move a certain distance (
arrow W direction). Therefore 1.゛As shown in Fig. 22.23, by positioning the paper ejection tray 90 at the paper ejection portion of the front transfer paper PI, and then moving the paper ejection tray 90 to the paper ejection region of the rear transfer paper P, Transfer papers can be stacked one after the other.

In addition, in the above configuration, gear! Jl, 93 with mausoleum power
However, timing belts and link mechanisms 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,
Paper output tray 101 of these auxiliary guides 108a, 108b
A second paper ejection drive roller group 109 and a second wandering driven roller group 1) 0 are provided on the side. This second discharge drive roller group 10
9, in this embodiment, the diameter of each roller decreases from the back (R side) to the front (F side), and conversely, in the second wandering paper driven roller group 1) 0, the diameter of each roller decreases from the back to the front. The diameter of the rollers is increased. Further, 1) 1 and 1) 2 are springs that hold 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 a group of paper discharge driven rollers 107, the transfer paper Pg on the back side is guided to auxiliary guides 108a and 108b by an auxiliary guide plate 105 which is rotated counterclockwise by a solenoid 103. . Then transfer paper P
2 is transferred while being tilted in the direction of the transfer paper P due to changes in the acting force caused by changes in the roller diameters of the second wandering driving roller group 109 and the second wandering driven roller group 1)0. 2
As shown in FIG. 6, the transfer paper P, is ejected so as to be diagonally superimposed on P,.

However, since the transfer papers P+ and Pt are stacked in the same order, there is no particular problem.

Furthermore, by adjusting the roller diameters of the second wandering paper driving roller group IQ9 and the second ejecting driven roller group 1)0 appropriately, one transfer paper P2 is ejected first, as shown in FIG. The paper output tray 101 is placed at a 90 degree angle to the transfer paper PI.
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 1) 0
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 wandering paper driven roller group 1) 0, the transfer paper P on the front side can be changed to the transfer paper P8 on the back side if necessary. Similarly, on the auxiliary guide plate 105, the auxiliary guide 108a
, 108b, allowing the vehicle to change direction at right angles to the direction of travel. As a result, as shown in FIG.
1 and P! is discharged.

Further, the embodiment of the paper ejection unit 140 shown in FIGS. ■
1 a& +-+-2 Elementary School 1 Gate Boku A 9 Dark/I From d to depth d, the slight change is made, d<duet (
R>1), and the roller diameter of the paper ejection drive roller 120 is set so that d, l<d□1×d, and each of the paper ejection driven rollers 121 is The roller diameter was determined.

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 dII, it 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, the case of using page continuous copying and double-sided copying, that is, the case of copying a book using the functions of parallel conveyance and double-sided copying, is shown in FIGS.
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
Figures (a), (bl, (cl) indicate the case where the last page is page 5 as an example where the manuscript 130 is an odd number of pages, and Figure 32 (a)
, (dl 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 13G and transfer paper 1
The numbers above 31 indicate the page numbers, and when the page portion is a front page, it is indicated by a solid line, and when it is a page section, it is indicated by a broken line, and the indication ``front'' is the front edge of the transfer paper 131. It is shown that. Furthermore, in the figure, the vertical side of (A) shows the state of the original 13G 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 13G 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(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,
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 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 lOO, where both sides are transferred so that the transfer operation is performed on the back side. It is sent to the tray 32.

After that, as shown in Fig. 26 (bl), the contact glass 13
26(a), and place the next two-page spread, that is, pages 3 and 4 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 131c on which 4 pages have been copied on one side is branched. After being sent to the section lOo, it is sent to the double-sided tray 32.

Next, as shown in FIG. 26 10), the contact glass 132 is
The final page of only one side, in this case, page 5, of the original 130 is placed on top with the front end similar to the state shown in FIG. 26(a).

Then, five pages are copied onto the back side of the transfer sheet 131C 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 in FIG. 26), 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 (al to 26 (dl) described above are comprehensively controlled by a control section described later. Furthermore, the transfer paper 131 discharged to the discharge tray is discharged in an overlapping state as described above. This 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. Paper presence/absence detection 1.2 is ON (
size), 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 only when paper presence/absence detection 2 is ON (Giku) and size detection is outputting A3 (or B4).

The flowchart in Figure 34 shows the “parallel conveyance display°” in the operation section.
When lit, after pressing the "Parallel Transport" key, the "Original° key" shows a difference in copy mode selection depending on the presence or absence of manual input.Also, only when the copy size is A3 or B4 depending on the set magnification and original size, "Parallel" will appear on the display. "Transportation" is displayed.

Figures 35 and 36 show the parallel conveyance both sides selected, respectively.
This is a flowchart showing the copying operation with and without manual input of the original key.The original key is for the front and rear originals.

This key is effective when performing different copying tasks, and allows you to manually set the copy mode for each document. In addition, the LAST key requires manual input during double-sided copying.
This key is used to eject the transfer paper fed from the paper feeder and 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 when the document key is not manually operated during parallel conveyance double-sided copying, and the first copy of the original is ejected to the paper ejection tray for one page, and the paper is transferred for two pages. 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, 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 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 operating unit 200.Next, keys and displays on the drawing will be described with reference numerals shown in the drawing in parentheses.

C (202) Mode clear key both sides (20
8) Double-sided copy key composition (209) Copy key inversion on the same copy side (
210) Paper ejection side selection key Print key (21))
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, user adjustment, and bereting (215) Copy mode selection key for front and rear 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, 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 a boat 302, and the aforementioned operation section 200 is also connected to the main control section 300. The main control unit 300 is connected to the driver unit 305 and the load system 30 via the O port 304.
6.

〔effect〕

Since the present invention is configured as described above, it can support various copying modes, improving copying work efficiency, and since paper sheets are conveyed in parallel from a single paper feeder, space in the height direction can be saved. A parallel conveyance type copying machine can be provided.

[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, and Fig. 7 is a brief explanation of the structure of the side guide. Map of the city,
FIG. 9 is a sectional view of FIG. 8, FIG. 1θ, FIG. Figure (b
1 is a cross-sectional view of the third tray, FIGS.
Figures 6 and 17 are partially sectional front views showing the operating state of the branching section, Figure 18 is a side view illustrating the relationship between the switching claw and the transfer paper of each size, and Figures 19 to 23 are A first embodiment of the paper tray alignment mechanism is shown, with FIG. 19 being a plan view, FIG. 20 being a front view, FIG. 21 being a side view, and FIGS. 22 and 23.
The figures are explanatory plan views showing the operating state, Figures 24 to 27.
The figures show a second embodiment of the alignment mechanism, with FIG. 24 being a front view, FIG. 25 being a side view showing the roller group, and FIG.
7 is a diagram showing the transfer paper discharge state, 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 discharge state, and FIG. 30 is a diagram showing the transfer paper discharge state. 31 is a front view showing the fourth embodiment of the alignment mechanism; FIG. 31 is a side view showing the roller group of the fourth embodiment; FIG. 32(a), FIG. 32(a)),
32(C) and 32(d) are diagrams explaining the operational relationship between the original and the transfer paper when copying a block object, FIG. 33 is a flowchart when displaying parallel conveyance, and FIG. 34 is A flowchart showing a state in which parallel conveyance is not possible, FIGS. 35 and 36 are flowcharts showing the transfer operation when the document key is not operated manually, FIG. 37 is an operation timing chart of the paper feeding device, and FIG. 38 is a plane view of the operation unit. 39 are block diagrams of the control section. 32.33.34.42...Paper feed section, 100...
・Branch section, 140...Paper discharge section, 300, 301°3
02.304...Control unit. Agent Patent Attorney Kenji Takeshi Figure 2 Figure 3 Figure 4 □ Figure 5 Figure 6 Figure 9 Figure 10 Figure 1/Figure 12 Figure 12 tσ Figure 12 tb Figure 15 Figure 16 Figure 79 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 26 Figure 27 Figure 29 Figure 30 Figure 37 Figure 34 Figure 37

Claims (2)

[Claims] (1) Parallel conveyance type copying characterized by dividing one paper feeding device into two, storing transfer sheets in parallel in the feeding direction, and making it possible to simultaneously feed two sheets of transfer paper in parallel. Machine. (2) A parallel conveyance type copying machine according to claim (1), wherein the bottom plate on which transfer papers are stacked in parallel can be independently pressed against a paper feed roller.