JPH08310740A - Automatic double-faced document feeder for sheet through scanner - Google Patents

Abstract

PURPOSE: To read and stack double-faced print documents in the order of pages by providing a switchback section between a document mount section and a double-faced document page order stack section, and providing a lever switched to the switchback side and the double-faced document page order stack section side. CONSTITUTION: A document 1 mounted on a document mount section 2 passes through a paper discharge roller 12 after the surface on the first carriage 8 side is read at the readout position 6, and it is conveyed while the surface is faced upward. An inverse switching lever 13 is switched to the switchback passage 14 side, and the document 1 passes between an inverse roller 15 and a driven roller 15a and is sent to a switchback passage 14. When the rear end of the document 1 is detected by a sensor 16, the inverse roller 15 is reversed CW, and the back face of the document 1 is read at the readout position 6 via a switchback return path 32. The document 1 read with both faces is conveyed upward, the inverse switching lever 13 is switched to the double-faced document page order stack section 17 side, and the document 1 is conveyed between the inverse roller 15 and a driven roller 15b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-through scanner double-sided document automatic feeder, and more specifically, it can be applied to an image reading device such as a copying machine, a scanner device, and a facsimile device for automatically reading a double-sided document. Especially, when the originals printed on both sides are read in the page order and discharged in the page order, the control can be simply performed by using the simple reversing mechanism, and the apparatus can be simplified and the apparatus cost can be reduced. In addition, the present invention relates to a sheet-through scanner double-sided document automatic feeding device that can reduce the time for reading a double-sided printed document.

[0002]

2. Description of the Related Art Generally, in a sheet-through scanner double-sided document automatic feeder used in a digital copying machine, it is necessary to read documents in page order and discharge them in page order in consideration of various applications in the scanner section. Has become.

Recently, it is necessary to control the increasing number of double-sided originals in the above sequence. Typically,
An example of a document capable of conveying a double-sided document is disclosed in Japanese Patent Laid-Open No. 2-8145. This document includes a document placing section for setting documents in page order, a sheet feeding / conveying section for separating the documents placed on the document placing section one by one and feeding them to the reading position, and reading at the reading position. The two-sided document, which has been completed, is separated from the document placing section and has a first transport path for transporting it to the switchback passage provided on the side of the apparatus, and the original transported to the switchback passage. And a return unit that reverses and returns the document to the reading position via a second conveyance path that is provided so as to bypass the inside of the apparatus and communicate with the reading position from the switchback passage. After the reading is completed, the sheets are stacked in the page order on the double-sided document page order stack section via the first transport path.

[0004]

As described above, in the conventional sheet-through scanner double-sided document automatic feeding device,
Since the switchback passage is provided on the side of the apparatus while being separated from the document placing section, there is a problem that the apparatus becomes large. Further, in addition to the switchback passage provided on the side of the apparatus, there is provided a second conveyance path provided so as to bypass the inside of the apparatus from the switchback passage to communicate the original returned from the switchback passage to the reading position. Since the sheet is inverted and returned to the reading position via the sheet, the structure of the apparatus becomes complicated, and the document conveying path from the switchback path to the reading position becomes long. Therefore, it takes a lot of time to convey the double-sided printed original, and there is a problem that the image reading time becomes long when the document is mounted on the image reading apparatus.

Therefore, according to the present invention, when the double-sided printing original is read in the page order and discharged in the page order, the control can be simply performed by using the simple reversing mechanism, and the apparatus can be downsized and simplified to reduce the apparatus cost. (EN) A sheet-through scanner automatic double-sided document feeder that can shorten the transporting time of a double-sided printed document by shortening the transporting time and reducing the reading speed when mounted on an image reading device. Is intended.

[0006]

According to the first aspect of the present invention,
In order to achieve the above object, in a sheet-through scanner double-sided document automatic feeder that automatically conveys a document printed on both sides to a reading position and discharges it, a document placement unit that sets the document face down in page order, A paper feeding / conveying unit that separates the documents placed on the document placing unit one by one and conveys them to the reading position, and a double-sided document that has been read at the reading position is provided above or below the document placing unit. Conveying / Ejecting Unit for Conveying / Ejecting Pages in Order to the Stacked Duplex Original Page Order Stack Unit, a Switchback Unit Provided Between the Document Placement Unit and the Double-sided Original Page Order Stacking Unit, and the Conveying / Discharging Device The reverse switching lever is provided on the original transport path of the copy section and switches the transport path of the original read at the reading position to either the switchback section or the double-sided original page order stack section. And a switchback transport path that communicates the switchback unit with the reading position.The transport / paper discharge unit returns the double-sided original document transported to the switchback unit to the reading position through the switchback transport route in the duplex mode. It is characterized by doing.

In this case, the first side of the double-sided printed original is conveyed to the reading position with the side to be read facing downward, and the original is read with the side not to be read facing downward by the reversal switching lever. The originals are sent to the switchback section provided between the page order stack sections,
The original that has not been read from the switchback unit is returned to the reading position via the switchback transport path, and the original is read. Since it is configured to feed to the page order stack section, the switchback section provided in the space between the document placing section and the double-sided document page order stack section, the switchback section side and the double-sided document page order stack section side By using a simple reversing switching lever that is simply switched to, the double-sided printing originals can be read in page order and stacked in page order by simple control.

Therefore, it is possible to reduce the size and simplification of the device and reduce the device cost. In addition to this, since the document can be returned from the switchback unit to the reading position via the switchback transport path, the transport distance of the double-sided print document can be shortened and the transport time can be shortened. It is possible to shorten the reading time when the is mounted on the image reading apparatus.

According to a second aspect of the invention, in order to achieve the above object, in the first aspect of the invention, it is provided at a predetermined position on the transport path of the transport / discharge unit and is read at the reading position in the single-sided mode. The present invention is characterized by having a paper ejection switching lever for switching the ejected single-sided original to the paper ejection side and ejecting the ejected original, and a single-sided original page order stack section for stacking the ejected originals in page order.

In this case, the single-sided original can be discharged to the single-sided original page stack unit provided at a predetermined position on the conveying path of the conveying / discharging unit, so that the conveying distance of the single-sided original can be shortened. Therefore, it is possible to shorten the reading time of a single-sided original. In order to achieve the above object, the invention according to claim 3 is the same as the invention according to claim 1 or 2,
The apparatus is characterized in that the apparatus is arranged above a scanner section which is composed of a light source provided at a document reading position and a reading apparatus section.

In this case, the original document sent to the reading position can be read by the scanner section provided at the bottom of the apparatus. According to a fourth aspect of the present invention, in order to achieve the above object, in the first or third aspect of the invention, in the single-sided mode, the originals conveyed via the switchback unit are stacked in page order. It is characterized by having a stack portion.

In this case, since the switchback section can be used as a paper discharge path for a single-sided original, it is not necessary to newly provide a paper discharge path for a single-sided original, and the apparatus can be made smaller and simpler and further It is possible to reduce the cost. The invention according to claim 5 achieves the above object.
In the invention according to claim 4, the single-sided original page order stacking unit also serves as the double-sided original page order stacking unit.

In this case, since the stack portion for a single-sided original and the double-sided original can be shared, it is not necessary to newly provide a stack portion for a single-sided original, and the apparatus can be made smaller and simpler to further reduce the cost. Can be realized.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are views showing a first embodiment of a sheet-through scanner double-sided document automatic feeding device according to the invention, and correspond to the invention described in any one of claims 1 to 3. In the illustrated example, this device is mounted as an image reading device on the upper part of the scanner device.

In FIGS. 1 and 2, reference numeral 2 denotes a document placing section, on which the document 1 printed on both sides is set in page order with one side facing down. This manuscript 1
When the document is set on the document placing section 2, the document stopper 3 provided on the end side of the document placing section 2 on the conveying side of the document 1 stops the conveyance of the document 1 at the end of the document 1 on the conveying side. The pickup lever 4 is raised so as not to press the document 1.

When the reading of the original 1 is started, the original stopper 3 is lowered further below the lowermost original 1 so that the original 1 can be conveyed, and the pickup lever 4 is arranged so as to facilitate the conveyance of the original 1. The document 1 is pressed downward by, and the document of the first page at the bottom is separated by the pickup belt 5 and sent to the reading position 6.

The original 1 conveyed to the reading position 6 side by the pickup belt 5 is conveyed to the reading position 6 at a constant speed by the feed roller 7 in order to obtain stable reading accuracy. In this embodiment, the pickup lever 4, the pickup belt 5 and the feed roller 7 form a sheet feeding / conveying means. Further, the reading operation of the document 1 at the reading position 6 is the same as that of a general sheet through scanner. When the reading operation of the document 1 at the reading position 6 is performed, the first carriage 8 and the first carriage 8 which constitute an optical system that irradiates the document 1 at the reading position 6 with light and receives the returning light for processing. Second, which constitutes an optical system that receives and processes the light sent from
With the carriage 9, the original 1 is read in a fixed state, and the light read by the first and second carriages 8 and 9 is
The CCD 11 reads through the lens 10. In addition, this first
Carriage 8, second carriage 9, lens 10 and CC
D11 constitutes a reading unit (scanner unit) 30,
It is provided in the main body of the scanner device arranged below the device.

When the original 1 is printed on both sides (preset in the double-sided mode), after reading one side (front side) of the first carriage 8 side facing downward of the original 1 at the reading position 6. The original 1 whose one side has been read after passing the reading position 6 is conveyed by the paper output roller 12 to the conveying path 31.
Is conveyed upward through the. At this time, the paper ejection roller 12
The original 1 that has passed through is conveyed with the read side facing upward and the non-read side facing downward.

The original document 1 conveyed through the paper ejection roller 12
The reversing switch lever 13 switches the transport path to the switchback passage 14 side (side) or the double-sided original page order stacking unit 17 side () that constitutes the switchback unit. The switchback passage 14 is provided between the document placing section 2 and the double-sided document page order stacking section 17 and extends in the extending direction of the double-sided document page order stacking section 17.

The reversing roller 15 is rotatable in the forward and reverse directions. When the reversing switching lever 13 is switched to the switchback passage 14 side, the reversing roller 15 rotates counterclockwise and holds the original with the driven roller 15a. To the switchback passage 14 and the reversing switching lever 13 rotates clockwise when the conveyance path is switched to the double-sided original page forward stack section 17 side () and the driven roller 15b.
At the same time, the original is sandwiched and discharged onto the double-sided original page order stack unit 17.

A sensor 16 is provided near the reversing roller 15.
When the sensor 16 detects the trailing edge of the document 1 sent to the switchback passage 14, the reversing roller is provided.
The document 1 fed into the switchback passage 14 is rotated counterclockwise in the clockwise direction, and is returned to the switchback conveyance path 32 () that is directed from the switchback passage 14 toward the reading position 6. In this embodiment, the paper discharge roller 12, the reversing roller 15, and the driven rollers 15a and 15b form a conveying / paper discharging unit.

When the original 1 is printed on only one side (preset in the single-sided mode), the reading position 6 reads the surface (front side) of the first carriage 8 facing downward in the original 1. After passing through the reading position 6, the original 1 whose surface has been read passes through the paper ejection roller 12 and then the paper ejection path.
The paper output switching lever 18 provided in the middle of 31 is switched upward about the fulcrum, so that the single-sided original page order stacking unit provided on the left side of the apparatus (left side of the drawing).
It is supposed to be stacked in 19 page order.

Next, the transfer flow will be described based on the flow chart shown in FIG. First, a document is set on the document placing section 2 with the image side facing down (step S1). Then, the transport mode is set depending on whether the original is a single-sided original or a double-sided original (step S2). When the original is a single-sided original and the single-sided mode is set, when the start switch is pressed (step S3), the original stopper 3 is pushed down to lower than the lowermost original 1 so that the original 1 can be conveyed. At the same time, the pickup lever 4 presses the original 1 downward to facilitate the conveyance of the original 1, and then the lowermost first page of the original is fed to the reading position 6 by the pickup belt 5.

The original 1 conveyed to the reading position 6 side by the pickup belt 5 is conveyed to the reading position 6 at a constant speed by the feed roller 7 so as to obtain stable reading accuracy, and is arranged below the reading position 6. The reading unit 30 reads the front surface (lower surface) of the document (steps S4 and S5). The original 1 which has passed through the reading unit 6 and whose front surface has been read passes through the paper ejection roller 12 and then the paper ejection switching lever 18 is switched upward with the fulcrum as a center (steps S6 and S7), so that the one-sided original page The pages are stacked in the forward stacking section 19 in page order (step S8). At this time, the document 1 is stacked in the single-sided document page order stacking section 19 with the read side facing downward.

On the other hand, in step S2, when a double-sided original is placed on the original placing portion 2 and the double-sided mode is set, the start switch is depressed (step S9) to set the original bundle as described above. 1 from the bottom of
The sheets are separated and conveyed to the reading position 6 (step S10). After the document 1 is read by the reading unit 6 on one side (front surface) of the first carriage 8 facing downward (step S11), the document 1 that has passed through the reading unit 6 is discharged. It is conveyed upward by the paper roller 12 (step S12). At this time, the document 1 that has passed through the paper ejection roller 12 is conveyed with the read side facing upward and the non-read side facing downward.

At this time, the discharge switching lever 18 is switched downward about its fulcrum, so that the communication with the single-sided original page sequence stacking unit 19 is blocked (step S13), so that the original 1 is discharged. It is conveyed through the route 31 as it is to the reversal switching lever 13. Then, the document 1 conveyed through the reversing path 31 is switched to the switchback path 14 side (side) by the reversing switching lever 13 (step S14), and the reversing roller 15 and the driven roller 15a slidingly contacting the reversing roller 15a. Sent during.

Then, the document 1 is sent to the switchback passage 14 (step S16) by rotating the reversing roller 15 counterclockwise (step S15). At this time, the document 1 is fed into the switchback passage 14 with the read side facing upward and the non-read side facing downward. Next, when the rear end of the document 1 sent to the switchback passage 14 is detected by the sensor 16 (ON in step S17), the reversing roller 15 rotates in the reverse direction in the clockwise direction (step S18), and the switchback unit 14 The original 1 sent to the document is returned to the reading unit 6 side through the switchback returning path 32, and the unread surface (back surface) of the original 1 is read by the reading unit 6 (steps S19 and S20).

Next, the document 1 whose both sides have been read is conveyed upward by the paper ejection roller 12 (step S20). At this time, the document 1 that has passed through the paper ejection roller 12 is conveyed with the first read surface (front surface) facing downward and the later read surface (back surface) facing upward. At this time as well, the paper ejection switching lever 18 provided in the middle of the paper ejection path 31 is switched upward with respect to the fulcrum so that communication with the single-sided original page sequence stacking section 19 provided on the left side of the apparatus can be established. Since it is blocked (step S22), the document 1 conveyed through the paper ejection roller 12 is switched to the upper side double-sided document page order stacking unit 17 side (side) (step S23). , Reversing roller 15 and driven roller 15b
Be transported between.

Next, the document 1 is stacked in page order on the double-sided document page stacking section 17 by rotating the reversing roller 15 clockwise (step S24) (step S25). At this time, the manuscript 1 is a double-sided manuscript page order stack section with the surface (front surface) read first facing downward.
Stacked to 17. Then, the second and subsequent sheets are read in page order through the same series of operations as above, and are stacked in page order.

As described above, in the present embodiment, the first side of the double-sided printed document is conveyed downward to the reading position with the side to be read facing downward, and then the document with the non-read side facing downward is switched by the reverse switching lever 13. The original is fed into the switchback passage 14 provided between the original placing portion 2 and the double-sided original page order stacking portion 17, and the original not read from the switchback passage 14 is read through the switchback conveying path 32. Since the document is returned by being returned to the position 6 and the original which has been read first with its face facing downward is read into the double-sided original page order stack section by the reversal switching lever 13, it is arranged so that Switchback passage 14 provided in the space between the double-sided original page sequence stacking unit 17, the switchback passage 14 side and the double-sided original page A simple inversion switching lever 13 only by switching on the stack portion 17, using, can be stacked in the order of pages read the double-sided printing document page order by a simple control.

As a result, the device can be downsized and simplified, and the device cost can be reduced. In addition to this, since the document can be returned from the switchback passage 14 to the reading position via the switchback transport path 32, the transport distance of the double-sided print document can be shortened and the transport time can be shortened. The reading time by the scanner device can be shortened.

Further, since the paper discharge switching lever 18 is provided in the middle of the conveyance path 31 and the single-sided original page order stacking section 19 for stacking the discharged originals in the order of pages is provided, the single-sided original is conveyed in the middle of the conveyance path 31. Since the sheets can be discharged to the single-sided original page order stacking section 19 provided in, the conveying distance of the single-sided original can be shortened and the reading time of the single-sided original can be shortened.

Further, since this apparatus is arranged above the reading section (scanner section) 30, the document 1 sent to the reading position 6 by the reading section 30 provided at the lower part of the apparatus.
Can be read. 4 to 6 are views showing a second embodiment of a sheet-through scanner double-sided document automatic feeding device according to the present invention, and correspond to the invention described in any one of claims 4 and 5. Note that in this embodiment, the paper discharge switching lever
It is characterized in that 18 and the single-sided original stacking section 19 are discharged so that the single-sided original is discharged to the double-sided original stacking section 17 through the switchback passage 14, and other configurations are similar to those of the first embodiment. Therefore, the same numbers are given to the same configurations and the description thereof is omitted.

4 and 5, the switchback passage 14 is shown.
A feed roller 21 is provided inside, and the feed roller 21 is adapted to rotate counterclockwise.
A single-sided original page order stack unit 23 is extended in the double-sided original page order stack unit 17.
The stack portion 23 is configured to discharge a single-sided original by a discharge roller 22 that is provided at the end of the switchback passage 14 and rotates counterclockwise. A bent portion 14a for guiding the document from the switchback passage 14 to the stack portion 23 is provided at the end of the switchback passage 14.

Next, the transfer flow will be described based on the flow chart shown in FIG. First, a document is set on the document placing section 2 with the image side facing down (step S31). Then, the transport mode is set depending on whether the original is a single-sided original or a double-sided original (step S32). When the original is a single-sided original and the single-sided mode is set, when the start switch is pressed (step S33), the original stopper 1 is placed at the bottom so that the original 1 can be conveyed by the original stopper 3.
Further, after the pickup lever 4 presses the original 1 downward to make it easier to convey the original 1, the lowermost first page of the original is fed to the reading position 6 by the pickup belt 5.

The original 1 conveyed to the reading position 6 side by the pickup belt 5 is conveyed to the reading position 6 at a constant speed by the feed roller 7 in order to obtain stable reading accuracy, and is arranged below the reading position 6. The reading unit 30 reads the front surface (lower surface) of the document (steps S34 and S35). The original 1 that has passed the reading position 6 and has been scanned on the front side passes through the paper discharge roller 12 and then
When the reversal switching lever 37 is switched to the switchback passage 14 side (steps S36, 37), the reversal switching lever 37 is fed between the reversal roller 15 and the driven roller 15a slidingly contacting the reversal roller 15.

Then, the document 1 is sent to the switchback passage 14 (step S39) by rotating the reversing roller 15 counterclockwise (step S38). The documents conveyed to the switchback passage 14 are discharged counterclockwise by the feeding roller 21 and the discharge roller 22 onto the single-sided document page order stacking section 23 via the bending section 14a (step S40- S42).

On the other hand, in step S32, when the double-sided original is placed on the original placing part 2 and the double-sided mode is set, the start switch is depressed (step 43) to set the original bundle as described above. One original is separated from the bottom of the sheet and is conveyed to the reading position 6 (step S
44). The original 1 is read by the reading position 6 on one surface (front surface) of the original 1 facing downward of the first carriage 8 (step S45), and then the original 1 that has passed the reading position 6 and is read is ejected. It is conveyed upward by the paper roller 12 (step S46). At this time, the document 1 that has passed through the paper ejection roller 12 is conveyed with the read side facing upward and the non-read side facing downward.

Next, the document 1 conveyed through the reversing path 31 is brought into sliding contact with the reversing roller 15 by the reversing switching lever 13 being switched to the switchback passage 14 side (step S47). Driven roller 15a
Sent during. Then, the document 1 is sent to the switchback passage 14 (step S49) by rotating the reversing roller 15 counterclockwise (step S48).
At this time, the document 1 is fed into the switchback passage 14 with the read side facing upward and the non-read side facing downward.

Next, when the rear end of the document 1 sent to the switchback passage 14 is detected by the sensor 16 (ON in step S50), the reversing roller 15 rotates in the clockwise direction in the reverse direction (step S51), and the switch is turned on. The original 1 sent to the back portion 14 is returned from the switchback passage 14 to the reading position 6 side via the switchback returning passage 32, and the unread side (back surface) of the original 1 is read at the reading position 6 (step S52). , S53).

Next, the document 1 whose both sides have been read is conveyed upward by the paper ejection roller 12 (step S54). At this time, the document 1 that has passed through the paper ejection roller 12 is conveyed with the first read surface (front surface) facing downward and the later read surface (back surface) facing upward. The original 1 conveyed through the paper ejection roller 12 is switched to the upper double-sided original page order stacking unit 17 side (side) by the reversal switching lever 13 (step S55), and the reversing roller 15 and the driven roller 15b.
Be transported between.

Next, the original 1 is stacked in the page order on the double-sided original page order stacking section 17 by the reverse roller 15 being rotated clockwise (step S56) (step S57). At this time, the manuscript 1 is a double-sided manuscript page order stack section with the surface (front surface) read first facing downward.
Stacked to 17. Then, the second and subsequent sheets are read in page order through the same series of operations as above, and are stacked in page order.

As described above, in this embodiment, in the single-sided mode, the single-sided original page order stack unit 23 for stacking the originals 1 conveyed through the switchback passage 14 in the page order is extended to the double-sided original page order stack unit 17. Since it was set up,
The switchback passage 14 can be used as a paper discharge path for a single-sided original. Therefore, it is not necessary to newly provide a paper discharge path for a single-sided original, and the size and simplification of the present apparatus can be further reduced to further reduce the cost.

Further, since the double-sided original page order stack section 17 is also used as the single-sided original page order stack section 23,
It is possible to share the stack portion of a single-sided original and a double-sided original. For this reason, it is not necessary to newly provide a stack portion for a single-sided original, and the apparatus can be made smaller and simpler, and the cost can be further reduced. In each of the above-described embodiments, the double-sided original page order stack is provided above the original document placing section 2.
Although 17 is provided, a double-sided document page order stack 17 may be provided below the document placing section 2. Even in the case of such a configuration, it goes without saying that the switchback passage 14 is provided between the document placing section 2 and the double-sided document page order stack 17.

[0045]

According to the first aspect of the present invention, the switchback section provided in the space between the document placing section and the double-sided original page order stack section, the switchback section side and the double-sided original page order stack section are provided. By using a simple reverse switching lever 13 that is simply switched to the side, the double-sided printing originals can be read in page order and stacked in page order by simple control.

Therefore, the device can be downsized and simplified, and the device cost can be reduced. In addition to this, since the document can be returned from the switchback unit to the reading position via the switchback transport path, the transport distance of the double-sided print document can be shortened and the transport time can be shortened. It is possible to shorten the reading time when the is mounted on the image reading apparatus.

According to the second aspect of the present invention, the single-sided original can be discharged to the single-sided original page order stack section provided at a predetermined position on the conveying path of the conveying / sheet discharging section.
The conveying distance of the one-sided original can be shortened, and the reading time of the one-sided original can be shortened. According to the third aspect of the present invention, the original section sent to the reading position can be read by the scanner section provided at the bottom of the apparatus.

According to the invention as set forth in claim 4, since the switchback portion can be used as a paper discharge path for a single-sided original, it is not necessary to newly provide a paper discharge path for a single-sided original, and the apparatus can be further improved. It is possible to achieve further cost reduction by downsizing and simplification. According to the invention of claim 5,
Since the stack portion for single-sided originals and double-sided originals can be shared, it is not necessary to newly provide the stack portion for single-sided originals, and the apparatus can be made smaller and simpler to further reduce the cost. it can.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment of a sheet-through scanner double-sided document automatic feeding device according to the present invention.

FIG. 2 is a block diagram showing an outline of a sheet-through scanner double-sided document automatic feeding device of the first embodiment.

FIG. 3 is a flowchart of a carrying operation according to the first embodiment.

FIG. 4 is a diagram showing the configuration of a second embodiment of a sheet-through scanner double-sided document automatic feeding apparatus according to the present invention.

FIG. 5 is a block diagram showing an outline of a sheet-through scanner double-sided document automatic feeding device according to a second embodiment.

FIG. 6 is a flowchart of a carrying operation according to the second embodiment.

[Explanation of symbols]

 1 Original 2 Original Placement Section 3 Original Stopper 4 Pickup Lever (Paper Feeding / Conveying Means) 5 Pickup Belt (Paper Feeding / Conveying Means) 6 Reading Position 7 Feed Roller (Paper Feeding / Conveying Means) 8 First Carriage 9 Second Carriage 10 Lens 11 CCD 12 Paper ejection roller (conveyance / ejection means) 13 Inversion switching lever 14 Switchback passage (switchback part) 15 Reversing roller (conveyance / ejection means) 15a, 15b Driven roller (conveyance / ejection means) ) 16 Sensor 17 Double-sided original page order stacking section 18 Paper ejection switching lever 19, 23 Single-sided original page order stacking section 21 Feed roller 22 Paper ejection roller 30 Reading section (scanner section) 31 Transport path 32 Switchback transport path

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display area H04N 1/00 108 H04N 1/00 108K

Claims (5)

[Claims] 1. A sheet-through scanner double-sided document automatic feeder for automatically conveying a document printed on both sides to a reading position and ejecting the document, and a document placing section for setting the document downward and in a page order. A paper feeding / conveying unit that separates the originals placed on the placing unit one by one and conveys them to the reading position, and a double-sided original that has been read at the reading position is provided above or below the original placing unit. A two-sided original page order stacking section that conveys and discharges pages in order, a switchback section that is provided between the document stacking section and the two-sided original page order stacking section, and An inversion switching lever that is provided on the document transport path and switches the transport path for documents scanned at the scanning position to either the switchback section or the double-sided document page-order stack section, A switchback conveyance path that communicates the switchback section with the reading position, and the conveyance / discharge section returns the double-sided document conveyed to the switchback section to the reading position through the switchback conveyance path in the double-sided mode. Characteristic sheet-through scanner Automatic double-sided document feeder. 2. A paper discharge switching lever, which is provided at a predetermined position on the transport path of the transport / discharge unit, switches a single-sided original read at the reading position in the single-sided mode to the discharge side, and discharges the sheet. 2. The sheet-through scanner double-sided document automatic feeding apparatus according to claim 1, further comprising a single-sided document page-order stacking unit that stacks the documents that have been printed in page order. 3. The sheet roof scanner double-sided according to claim 1, wherein the apparatus is arranged above a scanner section which is composed of a light source and a reading section provided at a document reading position. Automatic document feeder. 4. The sheet-through scanner double-sided according to claim 1, further comprising a single-sided original page order stacking unit for stacking originals conveyed through the switchback unit in page order in the single-sided mode. Automatic document feeder. 5. A sheet-through scanner double-sided document automatic feeding apparatus according to claim 4, wherein the single-sided document page-order stacking unit also serves as the double-sided document page-order stacking unit.