JPH0768012B2 - Intermediate tray device for double-sided synthesis - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to, for example, double-sided copying in which copying is performed on both sides of a sheet.
The present invention also relates to an intermediate tray device for double-sided composition in which sheets are subjected to a certain conveyance direction processing and re-fed in order to perform a composite copy in which one side of a sheet is copied and which is copied as needed.

[Conventional technology]

As an intermediate tray device for double-sided synthesis (hereinafter, simply referred to as a double-sided synthesis device) provided in a copying machine, a printer, etc., for example, as shown in FIG. As shown in FIG. 4 and those arranged in the desk 102, the sorter 1 is provided on the discharge side of the copying machine main body 101.
It is known that it is arranged in parallel with 03.

When carrying out the sheet conveyance in the double-sided mode in the double-sided synthesizing device 111 of FIG. 3, the sheet having passed through the fixing device 104 is guided to the first conveying path 106 through the gate 105, and the reversing portion of the first conveying path 106
The sheet is inverted and placed on the intermediate tray 107 by 106a. Then, the rear end side of the paper is used as the transport front end and the refeed unit 10
The paper is sent to the paper feed path 109 by the method 8.

On the other hand, when the sheet is conveyed in the composite mode, after the sheet is once guided to the second conveying path (switchback) 110, the rear end side of the sheet is conveyed as the conveying front end, and the first conveying path 106 is used.
Then, the sheet is inverted and placed on the intermediate tray 107 via the sheet feeding means, and the sheet is sent out to the sheet feeding path 109 by the sheet re-feeding unit 108 with the trailing edge side of the sheet being the transporting front end as described above.

Further, the sheet conveyance in the double-sided mode and the combination mode in the double-sided combination device 112 in FIG. 4 is also performed in the same manner as described above.

However, in the conventional device 112 shown in FIG.
In order to dispose the sorter 103 between the sorter 103 and the main body 101 of the copying machine, the sorter 103 must be moved when the apparatus is attached, which has a drawback that the mountability is poor, and the second conveyance path is provided.
When a jam (paper jam) occurs in 110, the process cannot be easily performed.

Further, the length of the second conveyance path 110 described above needs to be the length (indicated by l in the figure) according to the maximum size of the sheet, but both of the conventional devices 111 and 112 can perform the second conveyance. Since the structure is such that the path 110 extends downward, there is a drawback that the device becomes large. In addition, if the device becomes large in size as described above, it becomes difficult to provide the device 111 shown in FIG. 3 so that it can be pulled out from the desk 102, and there is a problem that paper processing cannot be easily performed when a jam occurs. is doing.

As a means for solving such a drawback, JP-A-62-6269
In the copying machine of the publication, there is disclosed a copying machine in which an intermediate tray, a conveying means, and a re-feeding means are formed as an integrated unit and which can be drawn out from the copying machine main body.

[Problems to be Solved by the Invention]

However, in the conventional apparatus provided in the above copying machine, in the composite copy mode, the paper is reversed and placed on the re-feeding side on the intermediate tray. However, in the double-sided copy mode, the sheet is placed on the intermediate tray at a position far away from the re-feed side. Therefore,
As it is, it is not possible to re-feed a sheet (especially a sheet having a small size), and a feed roller (for example, a multi-gate device) or the like is required to convey the sheet to a position below the re-feed roller. There is a drawback that.

[Means for Solving the Problems]

The intermediate tray device for double-sided composition according to the present invention is, in order to solve the above-described problems, a paper carry-in port communicating with a paper carrying system in the apparatus main body for carrying in paper, and carried in from the paper carry-in port. The paper is conveyed in the space above the intermediate tray, and the first conveyance system that reverses the paper and places it near the refeeding side on the intermediate tray, and the paper that has been carried in from the paper carry-in port. A second transport system for guiding the guided sheet to a space near the lower side of the intermediate tray substantially in parallel with the intermediate tray, communication between the sheet carry-in port and the first transport system, and a sheet carry-in port And a second transport system and a gate means for switching the communication between the first transport system and the second transport system, and a sheet re-feed for re-feeding the sheet reversely placed on the intermediate tray from the rear end side. And a means in one housing, and this housing Together are arranged to be drawn out from the apparatus main body, it is characterized in that is provided with the open window portion on the bottom wall portion of the housing which is located below the second transport system.

[Action]

According to the above configuration, in both the sheet conveyance in the combination mode and the sheet conveyance in the double-sided mode, the sheet is always placed on the re-feeding side on the intermediate tray via the first conveying system. Even in the case of a small size sheet, it is possible to perform sheet re-feeding only by the sheet re-feeding means described above, and it is not necessary to provide another mechanism such as a multi-gate device, and the structure of such an intermediate tray device is simplified. It is possible to achieve cost reduction and weight reduction. In particular, this reduction in weight has advantages that the intermediate tray device can be smoothly drawn out from the device body and that the drawing structure does not need to have high rigidity.

Further, since the second transport system is configured to guide the paper introduced from the paper carry-in port to the space below the intermediate tray almost in parallel with the intermediate tray, the intermediate tray device can be thinned. That is, it is possible to secure the length of the second transport system in accordance with the maximum paper size within the range of the length of the intermediate tray, and the height of the intermediate tray device is increased to secure this length. This is because there is no need to do it.

Further, since the bottom wall portion of the casing located below the second transport system is provided with the openable / closable window portion, even if a jam occurs in the second transport system, the intermediate tray device is provided. The jammed paper can be taken out by simply pulling out and opening the window portion, and the jam can be quickly processed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

The intermediate tray device for double-sided synthesis according to the present invention is, for example,
Deployed in copiers. In such a copying machine, as shown in FIG. 2, on the platen glass 2 of the copying machine 1,
An automatic document feeder (hereinafter referred to as ADF) 3 is installed. The ADF 3 conveys an original document (not shown) placed on the original placing table 3a to a predetermined position on the original platen glass 2 which is predetermined according to the size and the feeding direction (horizontal feeding or vertical feeding). In addition to the function of discharging the document to the outside of the ADF 3 after completion of copying, for example, when performing double-sided copying, the document is inverted and conveyed again to a predetermined position on the platen glass 2 and after completion of double-sided copying. It also has the function of ejecting a document outside of ADF3.

Below the platen glass 2, reflection mirrors 6a and lenses 6b are provided.
An optical system 6 composed of ... Is provided. This optical system 6
In addition to the basic function of guiding the reflected light reflected by the original to the photosensitive drum 7, the variable magnification function is also provided, and it is possible to perform not only equal-magnification copying but also enlargement and reduction copying. .

Around the photoconductor drum 7, a cleaner 8, a charge eliminating charger 9, a charging charger 10, a developing means 11 having toner for color copying, and a developing means 12 having black toner.
Is provided, and a series of operations of removal of residual toner, charge removal, charging, exposure (performed by the optical system 6), and development on the photoconductor drum 7 are performed by these means. Has become.

Below the photoconductor drum 7, a transfer charger 13 and a peeling charger 14 are provided, and when a copy sheet (not shown) passes between the photoconductor drum 7 and the transfer charger 13, the transfer charger 13 causes The toner image formed on the photoconductor drum 7 is transferred to the copy paper. Further, the peeling charger 14 separates the copy sheet from the photoconductor drum 7, and the separated copy sheet is transported to the fixing device 18 by the transport belt 17. The fixing device 18 is for fixing the toner transferred to the copy sheet by heating or pressing.

The copy paper that has passed through the fixing device 18 is basically the copy machine 1.
, That is, the sheet is discharged to the cradle 19a ... through the sorter 19, but when, for example, double-sided copying or composite copying is performed, the intermediate tray for double-sided composition according to the present invention passes through the paper return path 20. Device (hereinafter referred to as double-sided synthesis unit) 21
It is supposed to be guided to. The paper is sent to the paper supply path 22 after being processed in the conveying direction by the double-sided composition unit 21.

The paper supply path 22 is a path for guiding the copy paper to the photoconductor drum 7, and at the end portion thereof, the paper top roller 15 for timing the rotation of the photoconductor drum 7 and the delivery of the copy paper. Is equipped with. Also,
The paper supply path 22 is connected to paper supply means provided in several stages in the desk 39, and copy paper is appropriately supplied from these means. Specifically, in order from the lower side of the copying machine 1, the first fixed cassette 25, the first rotary cassette unit 26, the second rotary cassette unit 27,
The double-sided synthesis unit 21, the second fixed cassette 28, the third
A fixed cassette 29 and a manual feed unit 30 are provided. The first fixed cassette 25, the second fixed cassette 28, and the third fixed cassette 29 are detachably attached to the copying machine 1.
The second rotary cassette unit 27 is provided so that it can be pulled out together with the base plate 31 with respect to the copying machine 1.

The double-sided synthesis unit 21 is also provided so as to be able to be pulled out from the copying machine 1. That is, as shown in FIG. 1, guide rollers 36 are provided at predetermined positions on the upper end of the casing 35 of the double-sided composite unit 21, and each guide roller 36 is fixed to the main body of the copying machine 1. It is designed to roll on the rail 37. In addition, the guide roller 38 and
A guide rail 35a of the housing 35 is engaged on each guide roller 38, and the guide rail 35a moves on the guide roller 38 so that the double-sided composite unit 21 can be pulled out smoothly. Has become.

A first carrying system 41 and a second carrying system 42 are connected to a paper carry-in port 40 provided at the rear end of the paper return path 20 via a carry-in path 40a. At the point where the 40, the first transport system 41, and the second transport system 42 meet, the communication between the paper carry-in port 40 and the first carry system 41 and the connection between the paper carry-in port 40 and the second carry system 42 are performed. Communication and first transfer system 41
A small gate means 44 having two gate plates 44a and 44b is pivotally supported by a shaft 43 in order to switch communication between the second transfer system 42 and the second transfer system 42. Further, the paper guide 45 forming the confluence portion is swingably provided on the shaft 45a, and the confluence portion is opened to the outside by pivoting the paper guide 45 outwardly. Paper can be processed against the occurrence of a jam in the. A sheet transport roller 40b is provided in the carry-in path 40a.

The second conveyance system 42 guides the paper introduced from the paper carry-in port 40 to a space directly below the intermediate tray 46 almost in parallel with the intermediate tray 46 and sends the guided paper from the rear end side. There is a transport path 42a for guiding the above-mentioned paper to the bottom wall of the housing 35, and a normal path provided in the middle of this transport path 42a for appropriately transporting the paper to a paper guide 42c described later or to the first transport system 41. The reverse roller 42b and the paper guide 42c for guiding the sheet sent by the forward / reverse roller 42b are provided. The paper guide 42c is provided so as to be swingable about a shaft 42d in the vertical direction, and forms a window portion that can be opened and closed in the bottom wall portion of the housing 35. When the paper guide 42c is closed, a substantially flush surface is formed on the outer surface of the bottom wall of the housing 35.

On the other hand, the first transport system 41 transports the paper introduced from the paper carry-in port 40 using the space above the intermediate tray 46, and reverses the above-mentioned paper to the vicinity of the re-feeding side on the intermediate tray 46 and loads it. The transport rollers 41a are placed at appropriate intervals along the transport path.
, And sheet detection switches 41d, and a sheet reversing section 41b at the end of the transport path. The sheet reversing section 41b is for converting the sheet conveying direction by approximately 180 °, and forms an arc-shaped passage section with the upper roller 47a of the feeding roller 47 for feeding the sheet onto the intermediate tray 46. A paper guide plate 41c is provided. The end portion of the guide plate 41c faces the contact portion between the upper roller 47a and the lower roller 47b of the delivery roller 47.

At the upper position of the intermediate tray 46 and the lower position of the first transport system 41, a re-feeding device 51 is provided so as to be swingable about a shaft 50 in a vertical direction. A delivery roller 51a is provided on one side of the re-feeding means 51, and the delivery roller 51a is configured to re-feed the sheet reversely placed on the intermediate tray 46 from the rear end side. ing. Then, the delivery roller 51
The sheet to be re-fed at a passes through the re-feeding path 52 formed in the vicinity of the re-feeding side of the intermediate tray 46, and the delivery roller 52a arranged on the re-feeding path 52 described above. The paper is fed to the paper supply path 22.

Further, the intermediate tray 46 is configured so that the side wall plate 46a can be moved according to the width of the sheet placed on it, and whether or not the sheet is placed is determined by the weight of the sheet. It has a paper detection switch 46b that detects when it falls.

In the above structure, when double-sided copying is performed, the gate means 44 is positioned as shown by the solid line in the figure, and the paper carry-in port 40 and the first transport system 41 are in communication with each other.
The sheet carried in from the sheet carry-in port 40 is conveyed by the first conveying system 41, is reversed by the sheet reversing section 41b, and is transferred to the intermediate tray 46.
Placed on top. When the sheet is placed, the re-feeding unit 51 swings to the position shown by the phantom line in the figure, the delivery roller 51a is brought into contact with the sheet, and the sheet is delivered by the rotation of the delivery roller 52a and is re-loaded. The paper is sent out to the paper supply path 22 via the paper supply path 52.

On the other hand, when composite copying is performed, the gate means 44 is positioned as shown by the phantom line in the figure, and the sheet carry-in port 40 and the second transport system 42, and the second transport system 42 and the first transport system 42. 41 is in communication with each other. The paper carried in from the paper carry-in port 40 is guided onto the paper guide 42c via the carrying path 42a in the second carrying system 42. At this time, the forward / reverse roller 42b
Is rotating normally. Then, when the trailing edge of the sheet is detected by the sheet detection switch, the forward / reverse roller 42b starts reverse rotation and sends out the sheet. The sheet is sent out to the first conveying system 41 with its rear end side as the conveying front end, and is reversed and placed on the intermediate tray 46 through the sheet conveying process in the above-mentioned composite copying. When the sheet is placed, the sheet re-feeding unit 51 swings to the position shown by the phantom line in the figure to bring the delivery roller 51a into contact with the sheet. The sheet is delivered by the rotation of the delivery roller 51a, and is delivered to the sheet supply path 22 via the re-feeding path.

In this way, even when conveying paper in the composite mode,
Even in the paper conveyance in the double-sided mode, the paper is always placed on the refeed side on the intermediate tray 46 via the first conveyance system 41. It is possible to re-feed paper only with the paper means 51, and it is not necessary to provide another mechanism such as a multi-gate device, and the structure of the double-sided synthesis unit 21 is simplified to achieve cost reduction and weight reduction. You can In particular, this weight reduction has advantages that the double-sided composition unit 21 can be smoothly drawn out from the main body of the copying machine 1 and that the drawing structure does not need to have high rigidity.

In addition, the paper introduced from the paper carry-in port 40 is fed to the intermediate tray 46.
Since the second transport system 42 is configured so as to be guided to the space directly below the intermediate tray substantially in parallel, the double-sided synthesis unit 21 can be thinned. That is, it is possible to secure the length of the second transport system 42 in accordance with the maximum sheet size within the range of the length of the intermediate tray 46, and in order to secure this length, the height of the double-sided synthesis unit 21 is increased. This is because there is no need to increase the height.

Further, since a paper guide (window portion) 42c that can be opened and closed is provided on the bottom wall portion of the casing 35 located below the second transport system 42, jamming in the second transport system 42 is prevented. Even if it occurs, the jammed paper can be taken out by simply pulling out the double-sided composition unit 21 from the main body of the copying machine 1 and opening the paper guide (window portion) 42c, and the jam processing can be quickly performed.

In the present embodiment, by swinging the paper guide 45 outward, the merging portion is opened to the outside, and the sheet processing can be quickly performed even when a jam occurs in the merging portion.

Further, there are only two joints of the paper feed path between the double-sided composition unit 21 and the main body of the copying machine 1, that is, the paper carry-in port 40 and the re-paper feed path 52, and the paper carrying system such as the first carrying system 41 and rollers. Since the housing is compactly constructed in the housing 35, accurate positioning can be performed by the housing 35, and the reliability of the transport system can be improved.

〔The invention's effect〕

As described above, the double-sided composite intermediate tray device according to the present invention is provided with a paper carry-in port which communicates with the paper carrying system in the apparatus main body to carry in the paper, and a paper carried in from the paper carry-in port to the intermediate tray. The first transport system for transporting the above-mentioned paper by using the space above the intermediate tray and placing it near the re-feeding side on the intermediate tray, and the paper carried in from the above-mentioned paper carry-in port under the intermediate tray. A second transport system for guiding the guided sheet to the adjacent space substantially in parallel with the intermediate tray and for feeding the guided sheet from the rear end side, communication between the sheet carry-in port and the first transport system, and a paper carry-in port and the second transport system. Gate means for switching communication with the system and communication between the first transport system and the second transport system, and a sheet re-feeding means for re-feeding the sheet reversely placed on the intermediate tray from the rear end side thereof. It is provided inside the housing, and this housing is Together we are withdrawable as provided,
It is a configuration in which an openable / closable window portion is provided in the bottom wall portion of the housing located below the second transport system.

As a result, the structure can be simplified, the cost can be reduced, the weight can be reduced, the thickness can be reduced, and the jam processing can be performed quickly and easily.

[Brief description of drawings]

1 and 2 show one embodiment of the present invention. FIG. 1 is a side view showing the internal structure of an intermediate tray device for double-sided synthesis. FIG. 2 is a schematic configuration diagram showing a copying machine provided with an intermediate tray device for double-sided synthesis. 3 and 4 show a conventional example. FIG. 3 is a schematic configuration diagram of a switchback unit provided in the desk. FIG. 4 is a schematic configuration diagram of a switchback unit provided between the sorter and the copying machine. 1 is a copying machine (apparatus), 20 is a paper return path, 21 is a double-sided composition unit (intermediate tray device for double-sided composition), 35 is a housing,
40 is a paper inlet, 41 is a first transport system, 42 is a second transport system, 42
Reference numeral c is a paper guide (window portion), 44 is a gate means, 45 is a paper guide, 46 is an intermediate tray, 51 is a refeeding means, and 52 is a refeeding path.

Continuation of the front page (56) Reference JP-A-63-300066 (JP, A) JP-A-62-6269 (JP, A) JP-A-60-8863 (JP, A) Actual development Sho-62-26337 (JP , U)

Claims (1)

[Claims] 1. A paper carrying-in port communicating with a paper carrying system in an apparatus main body for carrying in a paper, and a paper carried in from the paper carrying-in entrance is carried in a space above an intermediate tray to carry out the above-mentioned paper. The first transport system, which is reversed and placed near the sheet re-feeding side on the intermediate tray, guides the sheet carried in from the sheet carry-in port to the space below the intermediate tray in parallel with the intermediate tray. A second transport system for sending out the guided paper from the rear end side, communication between the paper carry-in port and the first carry system, communication between the paper carry-in port and the second carry system, and first carry system and the second carry system. Gate means for switching communication with the system,
Re-feeding means for re-feeding the sheet reversely placed on the intermediate tray from the rear end side is provided in one housing, and the housing is provided so as to be drawn out from the apparatus main body. An intermediate tray device for double-sided composition, wherein an openable and closable window is provided on a bottom wall of the casing located below the second transport system.