JPH0230223B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double-sided recording device that records images on both the front and back sides of recording paper.

2. Description of the Related Art Conventionally, a double-sided recording apparatus that records on both sides of recording paper has been proposed. It also has a line sensor such as a one-dimensional CCD that reads the original image, and moves the original relative to the licensor.
A reciprocating reading device has been proposed which reads the information when moving back and forth. Various problems occur when image information read by such a reciprocating reading device is recorded on recording paper by a double-sided recording device.

The purpose of the present invention is to provide a new double-sided recording device that combines a reciprocating reader and a double-sided recording device, and furthermore, to provide a double-sided recording device that solves various problems caused by the combination.
a first reading device configured to read an image of the bottom surface of a moving document and output image information; and a first reading device arranged at a distance from a reading position of the first reading device in the direction of movement of the document, and to read an image of the top surface of the moving document. a second reading means for outputting image information; a moving means for reciprocating the document in the first direction and the second direction; a first recording means for recording, and a second side of the recording paper which is disposed away from the recording position of the first recording means in the conveyance direction of the recording paper and is being conveyed in a predetermined direction based on the supplied image information. It has a second recording means for recording an image, and a supply control means for controlling supply of image information from the first and second reading means to the first and second recording means, the supply control means , when the document is being moved in a first direction, image information from the first reading means is supplied to the first recording means, image information from the second reading means is supplied to the second recording means; , when the document is being moved in a second direction, image information from the first reading means is supplied to the second recording means, and image information from the second reading means is supplied to the first recording means. The present invention provides a double-sided recording device having the following characteristics.

FIG. 1 shows an embodiment of the reading device of the present invention.
In the figure, 2 is a sheet-like original, 4, 6, 8, 1
0, 12, 14 are feeding rollers, 16 is a document feeding table, 18 is a bottom reading platen, 20 is a top reading platen, 22, 24 is a document feeding guide, 26, 3
0 and 34 are light emitting elements, 28, 32 and 36 are light receiving elements, 38 is a document tray, 40 is a document bottom side reading unit, 50 is a document top side reading unit, 42, 52
44, 54 are folding mirrors, 46, 56 are imaging lenses, and 48, 58 are document illumination lamps.
It is a CCD line image sensor. This document lower surface reading unit 40 serves as the first reading means of the present invention.
The document upper surface reading unit 50 serves as the second reading means of the present invention, and the feeding rollers 4, 6, 8, 10, 12, 14
correspond to the moving means of the present invention, respectively.

The reading operation will be explained.

When the sheet-like original 2 comes into contact with the feeding rollers 4, 6, the insertion of the original 2 is detected by a photocoupler consisting of a light emitting element 34 and a light receiving element 36, and the feeding rollers 4, 6, 8, 10, 12, 14 starts rotating. The document 2 is placed between the reading platen 18 and the feed guide 2.
2 in a first direction therebetween. Then, the leading edge of the original 2 is connected to the light emitting element 34 and the light receiving element 3.
It is detected by a photocoupler consisting of 6, and the detection output is used as a synchronization signal during recording, which will be described later. The lower surface of the document 2 is read at the lower surface reading position A, and the upper surface thereof is read at the upper surface reading position B, which is distant from the lower surface reading position A in the moving direction of the document. When the original 2 is further fed, the rear end of the original 2 is detected by a photocoupler including a light emitting element 30 and a light receiving element 32 after both sides of the upper and lower surfaces have been read. If the original 2 is scanned only once, the original 2 is ejected to the original tray 38 as is. However, if multiple reading scans are requested for the document 2, the outputs of the photo couplers 30 and 32 cause the feeding rollers 4, 6,
8, 10, 12, and 14 are reversed, and the document 2 moves along the feeding path in a second direction opposite to the first direction. Then, this time, at reading positions B and A, the image actors on the original 2 are moved to the reading units 50 and 4 in the order of the top surface and the bottom surface.
Reads as 0. Then, when the above-described backward reading is completed and the photocouplers 26 and 28 detect the trailing edge of the document 2 in the moving direction, the feeding rollers 4, 6, 8, 10, and 12 start normal rotation again. As described above, the feeding roller repeats forward and reverse rotations depending on the number of reading scans, and the document 2 is finally discharged onto the document tray 38.

Next, the reading units 40 and 50 will be explained. The lower surface reading unit irradiates the document image at the reading position A with a lamp 42, and sends the reflected light through an optical path composed of a mirror 44 and a lens 46, so that it is one-dimensionally An image is formed on a CCD line image sensor 48 consisting of a large number of light receiving elements arranged in a row. The image sensor 48 obtains time-series image signals according to the incident light energy.

The operation of the top surface reading unit 50 is also exactly the same.

Next, a sectional view of a recording device suitable for recording using the image signal from the reading device of FIG. 1 is shown.

In the figure, 100 is recording paper, 102 is a paper feed roller, 106 is a registration roller, 108, 11
0, 132, 134, 136, 138 are conveyance rollers, 112, 114, 116, 118, 120,
122, 124, 126, 128, 130 are conveyance guides, 140, 142 are conveyance belts, 144 are paper discharge trays, 146, 148 are inkjet recording heads, 150, 152 are suction fans, 15
4, 156 is a porous guide plate, and 158 is a conveyance path switching melon.

This inkjet recording head 146 serves as the first recording means of the present invention.
48 corresponds to the second recording means of the present invention.

Explain the operation. Insertion of original 2 is done by photocoupler 3
4, 36, the paper feed roller 10
0, the conveyance roller 104 rotates, and the recording paper 100 moves along the guides 112 and 114 to the registration roller 1.
It is transported to 06. And photocoupler 26,
When the leading edge of the document 2 is detected by 28, the registration roller 106 rotates in synchronization with the detection signal, and the recording paper 100 is moved between the guide plate 150 and the guide 11.
6, and at the recording position C, the image sensor 48 for reading the bottom surface is detected by the recording head 146.
The lower side of the original image is recorded on the first side of recording paper 100 using the output image signal. At this time, the recording paper 100 is moved to the porous guide plate 1 by the suction fan 150.
54, the flatness of the recording paper at the recording position is maintained, and the distance between the recording head 146 and the recording paper 100 is also kept constant. The recording paper 100 is further conveyed by a conveyance roller 108, and reaches a recording position D that is distant from the recording position C in the conveying direction of the recording paper. At position D,
The upper surface of the original image is recorded on the second surface of the recording paper 100 by the recording head 148 using the image signal output from the upper surface reading image sensor 58 .

Here, the distance between the reading positions A and B of the reading device and the distance between the recording device CD are set to be equal. Therefore, no memory is required to temporarily store the image signal output of each image sensor 58.

Recording paper 1 on which recording was performed on the first and second sides
Since the switching melon 158 is at the solid line position in the figure at this time, the sheet 00 is discharged along the conveyor belt 140 and the guide 124 to the paper discharge tray 144 with the second side facing upward. The above is the operation of the recording device when the reading device reads the document forward. Next, the operation of the recording device when the reading device performs backward reading will be described.

When the leading edge of the document 2 is detected by the photocouplers 30 and 32, the recording paper 100 is transported by the paper feed roller 102 and the transport roller 104, and then the recording paper 100 is transported by the registration roller 10.
It is transported up to 6. When the rear end of the document 2 is detected by the photocouplers 30 and 32, the paper feed rollers 4, 6, 8, 10, 12, and 14 start rotating in reverse as described above. The registration roller 106 rotates in synchronization with the trailing edge detection signal of the photocouplers 30 and 32, and the recording paper 100 reaches the recording position C, and the recording paper 1
The upper surface image of the document 2 is now recorded on the first side of the document 00. Furthermore, at the recording position D, the image of the lower surface of the document 2 is recorded on the second surface of the recording paper 100.

Here, during forward reading, the first side 10 of the recording paper 100 is
Assuming that the letter "E" is recorded on the second side 100-1 and the letter "F" is recorded on the second side 100-2 as shown in FIGS.
The letters "E" and "F" are recorded on the surface as shown in FIG. 4a and b. Therefore, when the recording paper 100 during backward scanning is ejected by the conveyor belt 140 in the same way as during forward scanning, the recording papers 100 will be stacked on the paper ejection tray with each sheet having a different surface and direction. . Therefore, in this embodiment, when ejecting the recording paper during backward reading, the switching mechanism 158 is moved to the position shown by the broken line in the figure, so that the recording paper 100 is transferred to the conveyor belt 142.
The direction and surface of the recording paper 100 are reversed by the bent guide 130 and the bending portion 145 of the paper discharge tray 144.

With this configuration, as shown in FIG. 5, the recording paper 100' during forward scanning is ejected onto the paper output tray 144 in the direction of the arrow α, and the recording paper 100' during backward scanning is ejected onto the paper output tray 144.
0'' is ejected onto the paper ejection tray 144 in the direction of the arrow β. Therefore, during forward scanning and backward scanning, the recording paper is delivered to the paper ejection tray 1 with its direction and surface aligned.
44.

FIG. 6 is a control circuit diagram of the reading device and recording device of this embodiment.

In the figure, 60 and 70 are A/D converters, 6
2 and 72 are multiplexers, 64 and 74 are recording head drive circuits, 80 is a control circuit, 82 is a switching pawl drive circuit, 84 is a forward rotation clutch drive circuit, 86 is a reverse rotation clutch drive circuit, 88 is a registration roller drive circuit, and 90 is a registration roller drive circuit. It is a clock generator. The configuration consisting of the multiplexers 62, 72 and the control circuit 80 corresponds to the supply control means of the present invention.

In the figure, a control circuit 80 is composed of, for example, a one-chip microcomputer storing a control operation program, and controls various circuits based on document detection signals from light receiving elements 28, 32, and 36. The switching pawl drive circuit 82 drives the switching pawl 158 shown in FIG.
8, 10, 12, and 14 are rotated in the normal direction, and the reverse clutch drive circuit 86 rotates the paper feed roller in the reverse direction. Further, the registration roller drive circuit 88 drives the registration roller 106.

Further, the output image signal of the image sensor 48 for reading the bottom surface is converted into a binary image signal by the A/D converter 60 and input to the multiplexers 62 and 72. The output image signal of the image sensor 58 for top surface reading is also converted into a binary image signal and input to the multiplexers 62 and 72. The multiplexer 62 outputs the output of the A/D converter 60 to a head drive circuit 64 that drives the recording head 146 when the reading device is performing forward reading, and outputs the output from the A/D converter 60 to the head drive circuit 64 that drives the recording head 146 when the reading device is performing backward reading. The output of the circuit 70 is output to the circuit 64.

Similarly, multiplexer 72 outputs the output of converter 70 during forward reading, and outputs the output of converter 60 during backward reading to head drive circuit 74 which drives recording head 148.

As described above, the double-sided recording device of this embodiment includes a reciprocating reading means for reciprocatingly reading the images of the two sides of the original document using a line sensor, and a first recording member that performs recording on the first side of the recording paper. , a second recording member arranged at a distance from the recording position of the first recording member and recording on the second side of the recording paper; The image information is recorded on the first recording member, and the image information on the Otsu side is recorded on the second recording member. During the return movement, the image information on the Inoue side is recorded on the second recording member, and the image information on the Otsu side is recorded on the first recording member. are doing.

With this configuration, there is no need to provide a memory for storing read information when the reading means moves forward and backward.
Recording can be performed on both the first and second sides of the recording paper.
Therefore, a double-sided recording device capable of high-speed recording can be provided.

Furthermore, in the recording device of this embodiment, the recording paper on which the image information read during the forward movement of the reading means is conveyed is conveyed through a different conveyance path from the recording paper on which the image information read during the backward movement is recorded. Since either of the recording paper conveyance paths is provided with a reversing mechanism for reversing the recording paper, both the recording paper during forward reading and backward reading are ejected with their directions and surfaces aligned.

In this embodiment, a sheet-like original reading device having images on both sides was used as the reciprocating reading means, but for example, as shown in FIG.
Divide the top of 00 into G area and H area and book-like original 20
It is also possible to use a reading device of the type in which the reading unit 202 reads the data back and forth in the direction of the arrow 203. That is,
The image of area G corresponds to the image of the back of the present invention, and the image of area H
The image of the area corresponds to the image of Otsumen.

As described above, according to the present invention, images on both sides of a document can be recorded on both sides of a plurality of recording sheets at high speed with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the document reading device of this embodiment, FIG. 2 is a sectional view of the recording device of this embodiment, and FIG. 3 is a diagram showing an example of the recording state of recording paper during forward reading. FIG. 4 is a diagram showing an example of the recording state of the recording paper during backward reading, FIG. 5 is a diagram showing the loading state of the recording paper on the discharge tray, and FIG. 6 is a control circuit diagram of this embodiment. 7
The figure is a sectional view of a reading device according to another embodiment. In the figure, 2 is a document, 26, 30, 34 are light emitting elements, 28, 32, 36 are light receiving elements, 40 is a bottom surface reading unit, 50 is a top surface reading unit, 4
8, 58 is a line image sensor, 146, 148
158 indicates an inkjet recording head, and 158 indicates a switching claw.

Claims (1)

[Scope of Claims] 1. A first reading means for reading an image of the lower surface of a moving document and outputting image information; a second reading device that reads an image on the upper surface of the document and outputs image information; a moving device that reciprocates the document in the first direction and the second direction; and a recording device that is being transported in a predetermined direction based on the supplied image information. a first recording means for recording an image on the first side of the paper; and a first recording means arranged at a distance from the recording position of the first recording means with respect to the conveying direction of the recording paper, and being conveyed in a predetermined direction based on supplied image information. A second recording means for recording an image on a second side of recording paper; and a supply control means for controlling supply of image information from the first and second reading means to the first and second recording means. When the document is being moved in a first direction, the supply control means transmits image information from the first reading means to the first recording means, and transmits image information from the second reading means to the second recording means. while the document is being moved in the second direction.
A double-sided recording device characterized in that image information from the first reading means is supplied to the second recording means, and image information from the second reading means is supplied to the first recording means.