JPS63138362A - Both-face copying machine - Google Patents

Abstract

PURPOSE:To attain a both-face copying while the top-bottom directions of its top and reverse surfaces are made coincident by a simple constitution regardless of the direction of an original by providing an original direction input means and a system switching control means. CONSTITUTION:The original input means is used to input whether the top-bottom direction of the original coincides with or crosses the axis of the form inversion of a form inverting and refeeding mechanism 2. Then the system switching control means controls copying operation. Namely, an automatic both-face copy is taken when the directions are coincident, and when the directions cross each other, originals are fed by an automatic original feeding mechanisms successively, copied, sheet by sheet, and stacked in the intermediate tray 10 of the form inverting and refeeding mechanism 2, when all the originals are fed, a temporary stop is made and when a specific restart input is supplied after the temporary stop, the originals are fed successively by the automatic original feeding mechanism 3. Then, only originals which are not coincident are copied on forms refed from the intermediate tray 10 and the forms after copying are discharged to a paper discharge tray 5. Consequently, a both-face copy is taken while the top-bottom directions of both surfaces are coincident with each other by the simple constitution regardless of the original of the original.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a double-sided copying machine, and more particularly to a double-sided copying machine that can perform double-sided copying by correctly aligning the top and bottom directions of the front and back sides.

In conventional double-sided copying, basically, as shown in FIG. ' is used to copy the next original G2.

FIG. 4 shows the case where the vertical direction α of the originals C, C2 is the same direction as the axis of reversal β of the paper, and the copied images 'A, B, C, DJ' formed on the front side P of the paper and the back side The vertical directions of the copied images 'E and FJ formed on P' match.

However, as shown in FIG. 5, when the vertical direction α of the originals G, G2 intersects the paper reversal axis β, the copied images 'A, B, There is an inconvenience that the vertical directions of the copied images 'E, FJ formed on the back surface P' are opposite to those of C, DJ.

Therefore, in order to eliminate this inconvenience, the
In addition to the sheet reversal axis β shown in the figure, a double-sided copying machine has been proposed that has a sheet reversal axis in a direction that intersects this axis β. As such a conventional example, for example, Japanese Patent Application Laid-open No. 58-
There are devices disclosed in No. 125051 and Japanese Unexamined Patent Publication No. 125052/1983.

Other conventional double-sided copying machines include, for example, JP-A-59
There are devices disclosed in Japanese Patent Application Laid-open No. 216160 and Japanese Patent Application Laid-Open No. 61-62065.

Problems with the prior art
The double-sided copying machine disclosed in Japanese Patent No. 052 has a problem in that the structure is too complicated because it has to have two paper reversal and refeed mechanisms in order to have two paper reversal axes.

On the other hand, in the double-sided copying machine disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 59-216160 and Japanese Patent Application Laid-Open No. 61-62065, when the vertical direction of the original intersects the paper reversal axis, copies are made on both sides of the paper. The problem of the image being oriented in the opposite direction has not been resolved.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a double-sided copying machine that has a simple configuration and can perform double-sided copying by aligning the top and bottom directions of the front and back sides regardless of the orientation of the original. It is in.

Structure of the Invention The double-sided copying machine of the present invention has a paper reversing and refeeding mechanism for double-sided copying and an automatic document feeding mechanism, in which the vertical direction of the document is aligned with the paper reversing axis of the paper reversing and refeeding mechanism. an original direction input means for inputting whether the directions are the same or intersecting; when the directions are the same, automatic double-sided copying is performed; when the directions are intersecting, the documents are sequentially fed by an automatic document feeding mechanism;
It copies every other sheet, stacks the copied paper on the intermediate tray of the paper reversing and refeeding mechanism, temporarily stops when all documents have been fed, and automatically restarts when a specified restart input is given after the temporary stop. A control method in which the document feed mechanism feeds documents in sequence, copies only those documents that have not been copied previously onto the paper fed again from the intermediate tray, and discharges the copied paper to the output tray. The configuration is characterized by being equipped with a switching control means.

In the above configuration, the document direction input and restart input refer to both manual input using key operations and/or automatic input using a sensor.

EMBODIMENT OF THE INVENTION Hereinafter, the present invention will be explained in more detail based on the embodiments shown in the drawings. Here, FIG. 1 is a schematic configuration diagram of a double-sided copying machine according to an embodiment of the present invention, FIG.
1 is a conceptual diagram of each process of performing double-sided copying with the same double-sided copying machine. It should be noted that the present invention is not defined by the embodiments shown in the figures.

The double-sided copying machine 1 shown in FIG. 1 includes a paper reversal and refeed 11ti2 for double-sided copying and an automatic document feeding mechanism 3.

The paper reversing and refeeding mechanism 2 transfers the paper that has left the fixing unit 4 to a duct 8 using a switching guide 6 without discharging the paper to a paper output tray 5.
Then, by the action of the roller luff, the paper is sent to the reverse feed path 9, and further sent to the intermediate tray 10, stacked on the intermediate tray 10, and by driving the cam roller 11, the paper on the intermediate tray 10 is sequentially sent from the bottom. Take it out and
The paper is fed to the paper feed section 12 again.

When the paper is fed from the intermediate tray 10 to the paper feed section 12, it is turned inside out. Therefore, the axis of sheet reversal is oriented in a direction perpendicular to the paper surface of the first TjIJ.

The automatic document feeding mechanism 3 drives a cam roller 22 and the like to sequentially take in the documents stacked on the document supply tray 21 from the bottom, moves them to a predetermined position on the document surface glass 13 by a belt 23, and after completing the exposure scan, Original output tray 2
4.

The operation control of this double-sided copying machine 1, including the control of the paper reversing and refeeding mechanism 2 and the automatic document feeding mechanism 3, is performed by a control device centered on a microcomputer.
Since its hardware configuration is similar to a conventionally known configuration, illustration thereof is omitted.

However, its operation is unique to the present invention and is illustrated in FIGS.

Below, Figure 2 te1. (The operation will be explained in detail with reference to bl.

First, assume that the original is a one-sided original, with its longitudinal direction being the vertical direction, and that the original is stacked in order from the first page. Place it face down. It is assumed that a print key (not shown) is pressed after performing an operation for specifying supply of a document by the automatic document feeding mechanism 3, an operation for specifying double-sided copying, and an operation for specifying automatic paper selection.

Then, the control device controls the cam roller 22 . The belt 23 and the like are driven to capture the first sheet of the original onto the original glass 13 (Sl, S2).

At this time, the document size is detected by the document width detection sensor 25 and document length detection sensor 26 (33). however,
The document width refers to the document size in the direction perpendicular to the plane of the paper in FIG. 1, and the document length refers to the document size in the direction in which the document is taken in.

If the document size is detected, the cassette 14, 15, or 16 having the corresponding paper size is selected (S4).

Next, the selected cassette 14, 15, or 16 is used to check whether the paper is for marriage or not (35). Here, vertical feeding refers to feeding the paper in a state where the longitudinal direction of the paper and the feeding direction of the paper are the same direction. The feeding direction of the paper is from right to left on the page of FIG.

Since the paper is selected according to the original, the longitudinal direction of the paper is the longitudinal direction of the original, which is the vertical direction of the original. Therefore, dark blue feeding means that the vertical direction of the document is from the right to the left of the page of FIG.

On the other hand, since the paper reversal axis of the paper reversal and refeeding mechanism 2 is perpendicular to the plane of the paper in FIG. , and not vertical feeding means that the vertical direction of the document and the axis of paper reversal are in the same direction.

Now, since the document is placed with its longitudinal direction perpendicular to the plane of the paper in FIG. 1, it is not fed vertically in this case. Therefore,
The process moves from step S5 to step S6.

In step S6, it is checked whether the document is an odd number.

If it is an odd number, the paper will be fed from either case (S7), 14, 15, or 16, and predetermined copying processing will be performed (S8).
The paper that has left the fixing unit 4 is discharged to the intermediate tray IO by the paper reversal and refeeding mechanism 2 (S9).

After copying the specified number of sentences (SIO), the original is ejected (Sll).

Next, the document sensor 27 checks whether it is the final document (512), and if it is not the final document, the step S1
Return to

Then, the next document is imported and the paper is selected, but
Since the next document will be an even number, the process moves from step S6 to step 313.

In step 13, a sheet of paper is fed from the intermediate tray lO, and a copying process is performed on the sheet (S14).

Then, the paper is discharged to the paper discharge tray 5 (S15).

Repeat steps S13 to S515 for the specified number of sheets.
16) The original is ejected (S17).

Then, check whether it is the final manuscript.318)
, if it is not the final manuscript, the process returns to step s1.

Thus, the double-sided copied sheets are sequentially stacked 18 on the tray 5.

If the even-numbered manuscript becomes the final manuscript (S18), the process stops there; if the odd-numbered manuscript becomes the final manuscript (S12)
, since the last sheet remains on the intermediate tray 10, it is ejected to the ejection tray 5 (519) and then stopped.

Note that if automatic paper selection is not specified and the paper is specified from the beginning, the original size is not detected, and the original is imported (S20) and the cassette for the specified paper is selected (521). .

In this case as well, it is checked whether the selected cassette is to be fed vertically (S5).

As can be understood from the above description, when the vertical direction of the document is the same as the axis of paper reversal, double-sided copying is automatically performed, and then the double-sided copying machine 1 is stopped. In double-sided copying in this case, the top and bottom directions of both sides match without any problem (see Figure 4).Next, we will explain the case where the document is placed on the document supply tray 21 with the longitudinal direction parallel to the direction in which the document is taken in. do. Other conditions are the same as in the above case.

FIG. 3 (al represents the initial state.

The first document is imported, paper is selected accordingly, and whether or not the paper is fed vertically is checked (S5)
.

In this case, since it is vertical feeding, the process moves from step S5 to step 531.

In step 531, it is checked whether or not the document is being fed in the first pass. Since it is the first pass, step S
Move to 32.

In step 532, it is checked whether or not it is an odd-numbered document, and if it is an odd-numbered document, steps S7' to S11' similar to steps S87 to Sll described above are executed. In other words,
Only odd-numbered originals are copied, and the copied sheets are stacked on the intermediate tray 10.

Next, it is checked whether it is the final manuscript (S33), and if it is not the final manuscript, the process returns to step Sl.

Then, the next document is taken in, but since it is still the first pass and the document is an even number, it is simply ejected (S31.S32.Sll').

In this way, only the odd-numbered originals are copied onto the sheets fed from the cassette and stacked on the intermediate tray 10. The originals are fed sequentially to the end.

When the final document is ejected (333), a message indicating that the lth bus has been completed is displayed on the display (not shown).
The double-sided copying machine 1 enters a temporary stop state (S34).

3'FXJ) shows this temporary stop state, in which all originals are stacked on the original ejection tray 24, and odd-numbered originals are stacked on the intermediate tray 10. .

Here, the operator takes the original on the original output tray 24 and
Reverse the document and place it on the document supply tray 21 again.

FIG. 3 fc) shows this state.

Then press the print key again.

Then, the first document is taken in, but since it is vertically fed (S5) and not the first pass (331), the process moves to step S35.

In step S35, it is checked whether the document is an even numbered document.
If it is not an even number, the document is simply ejected (S
36), if it is not the final document, the process returns to step S1 (S37). Originals that are not even-numbered are odd-numbered originals, and since they have already been copied in the first pass, they are simply fed.

Now, if the document is an even number (S35), steps S13' to S17 are similar to steps 313 to S17 described above.
' is executed. In other words, even-numbered originals are copied onto the paper re-fed from the intermediate tray 10 and ejected to the paper ejection tray 5.

If the manuscript is not final (338), the process returns to step S1.

In this way, the originals are fed one after another, and when the even-numbered original is the last one (338), the double-sided copying machine 1 stops. If the odd-numbered document is the final document (S37), the intermediate tray 10
Since the last sheet remains, it is ejected to the ejection tray 5, and the double-sided copying machine 1 is stopped (339).

FIG. 3 fd+ shows the final state, in which all the originals are sent and stacked on the original discharge tray 24, and sheets with double-sided copies are stacked on the paper discharge tray 5.

In the above case, since the vertical direction of the original and the axis of paper reversal are in the intersecting direction, the vertical direction of the copied image on both sides is reversed (see Figure 5). Since the front and back are reversed when transferring from the paper tray 24 to the document supply tray 21, the top-to-bottom direction of the document itself is reversed, and as a result of the reverse orientation being overlapped twice, the obtained copied image has the same top-to-bottom direction on both sides of the paper. It becomes what it is.

As described above, according to the double-sided copying machine 1, no matter how the original is oriented in the vertical direction, double-sided copying can be performed in which the vertical directions of the front and back sides match.

In another embodiment, an automatic document feeding mechanism takes in the originals stacked on the original supply tray in order from the top, and a paper reversing and refeeding mechanism refeeds the stacked sheets in the intermediate tray in order from the top. This includes things that are provided.

In yet another embodiment, when the automatic document feeding mechanism is capable of automatically feeding documents into two buses, if the document is not fed vertically, the first bus copies one sheet at a time and transfers the documents to the intermediate tray. In the second bus, which is performed automatically, the originals that were not copied first are copied onto sheets re-fed from an intermediate tray, and the sheets are ejected to a paper ejection tray.

In the case of vertical feeding, it temporarily stops at the first pass and does not automatically start the second pass.

Another example is one in which the document direction can be manually input by key operation.

Still another embodiment is such that when a document is detected by a document sensor after a temporary stop, a timer automatically provides a restart input after a predetermined period of time.

Effects of the Invention According to the present invention, in a double-sided copying machine having a paper reversing refeeding mechanism and an automatic document feeding mechanism for double-sided copying, the vertical direction of the original is relative to the paper reversing axis of the paper reversing and refeeding mechanism. an original direction input means for inputting whether the direction is the same direction or an intersecting direction; when the direction is the same, automatic duplex copying is performed; when the direction is an intersecting direction, an automatic document feeding mechanism sequentially feeds the original f height; Copies every other sheet, stacks the copied paper on the intermediate tray of the paper re-feeding mechanism, temporarily stops when all the originals have been fed, and when a predetermined restart input is given after the temporary stop. The automatic document feeding mechanism feeds originals in sequence, copies only the originals that have not been copied before onto the paper fed again from the intermediate tray, and controls the copied paper to be ejected to the output tray. A double-sided copying machine characterized by being equipped with a mode switching control means is provided, and thereby, with a simple configuration, double-sided copying in which the top and bottom directions of both sides match regardless of the orientation of the document can be performed.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a double-sided copying machine according to an embodiment of the present invention;
Figure 2 (al, (bl) is a flowchart of the main parts of the operation of the double-sided copying machine, Figures 3 (taj to (d)) are conceptual diagrams of each process of duplex copying with the double-sided copying machine, and Figure 4 is a double-sided copying process. 5 is a diagram equivalent to FIG. 4 when the orientation of the original is changed. (Explanation of symbols) 1...Double-sided copying machine 2...Paper reversal and refeeding mechanism 3... - Automatic document feeding mechanism 5... Paper ejection tray 10... Intermediate trays 14 to 16... Cassette 21... Original supply tray 24... Original ejection tray 25... Original width detection sensor 26. ...Document length detection sensor 27...Document sensor.

Claims (1)

[Scope of Claims] 1. In a double-sided copying machine having a paper reversing and refeeding mechanism for double-sided copying and an automatic document feeding mechanism, the vertical direction of the document is relative to the paper reversing axis of the paper reversing and refeeding mechanism. A document direction input means for inputting whether the direction is the same direction or a cross direction; if the direction is the same direction, automatic double-sided copying is performed; if the direction is a cross direction, the document is fed sequentially by an automatic document feeding mechanism, and one sheet of the document is fed in sequence. The copied paper is stacked on the intermediate tray of the paper re-feeding mechanism, and when all the originals have been fed, it is temporarily stopped. After the temporary stop, when a predetermined restart input is given, the original is automatically fed again. A method switching control means for controlling the mechanism to sequentially feed the originals, copy only those originals that have not been copied first onto the paper re-fed from the intermediate tray, and discharge the copied paper to the paper output tray. A double-sided copying machine characterized by being equipped with. 2. The double-sided copying machine according to claim 1, wherein the document direction input means is automatic input means that detects the longitudinal direction of the document and determines the longitudinal direction as the vertical direction.