JP3031965B2 - Document reading device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading apparatus, such as a copying machine and a facsimile, having a function of automatically turning a page of a book document and a function of automatically feeding a sheet document.

(Prior Art) As a document reading device in a copying machine, a facsimile, or the like, a sheet document is automatically conveyed to a document reading position to read document information, and a read document is automatically discharged from the document reading position. An automatic document feeder (ADF) is known.

In this way, if the document is a sheet document, the ADF can be used to read the document information automatically, but if the document is a book document, an automatic page turning mechanism is realized. However, at this stage, it is only possible to manually turn the pages of a book document at this stage.

Conventionally, in view of the current situation, various proposals have been made for methods and means for automating the reading of a book document which is troublesome.

Conventional techniques relating to the automatic reading of book originals include, for example, Japanese Patent Application Laid-Open No. Sho 54-21836, "Reading Apparatus in Copier", Japanese Patent Application Laid-Open No. 61-284492, "Automatic Page Change Device for Book-Shaped Originals", JP-A-56-60294, "Book page turning device", JP-A-60-122292, "Image forming device", JP-A-63-47197, "Automatic page turning device", JP-A-63-47197 No. 47198, "Automatic page turning device", Japanese Patent Application Laid-Open No. 63-49743, "Document Processing Device", Japanese Patent Application Laid-Open No. 63-49744, "Document Processing Device", Japanese Patent Application Laid-Open No. 63-49745, "Document Processing Device" JP-A-63-49746, "Document processing apparatus", JP-A-63-49747, "Document processing apparatus", JP-A-63-49748, "Document processing apparatus", JP-A-63-49749 Japanese Unexamined Patent Application Publication No. 63-49750, Japanese Unexamined Patent Publication No. 63-49750 Document processing device, JP-A-63-50826, Document processing device, JP-A-63-50827, Document processing device, JP-A-63-50828, Document processing device, JP JP-A-63-51192, "Document Processing Apparatus"; JP-A-63-41192, "Page Turning Apparatus"; JP-A-63-42895, "Automatic Page Turning Apparatus"; JP-A-63-67191, "Page turning device", JP-A-63-67192, "Page turning device", and JP-A-63-41588, "Book turning device" Japanese Patent Application Laid-Open No. Sho 62-267196, "Safety Device for Page Turning Device", Japanese Patent Application Laid-Open No. Sho 62-267197, Japanese Patent Application Laid-Open No. Sho 62-234462, "Image Scanner", Japanese Patent Application Laid-Open No. Sho 63-267462. No. 33738, “Copier”, JP-A-62-273892, “Page-turning device”, JP-A-63-64797, “Page-turning device” ”, Etc. are proposed.

However, in the above-mentioned conventional technology, there are many proposals only with an idea, and have not yet reached a level that can be realized.

(Problems to be Solved by the Invention) By the way, as described above, among many proposals that do not fall outside the scope of the idea, for example, Japanese Patent Application Laid-Open Nos. 61-284492 and 62-35891 There are also proposals that have the potential for practical use, such as the technology described in, but this technology places the book document with the reading side of the document information facing down and spreads it, and moves the book document. The page is sucked and separated.

However, when the book document is moved with the spread book document placed downward as in this apparatus,
Since the original surface of the book original itself rubs against the original placing surface due to its own weight, there is a disadvantage that the page turning operation lacks reliability.

In addition, this conventional apparatus has a problem that the size of the page turning apparatus alone becomes considerably large.

Among the above-mentioned prior arts, there is a page turning device configured to turn a document information surface of a spread book document upward and perform page turning by a negative pressure by suction, such as a roller or an arm. The conventional page turning apparatus has a problem that it becomes a considerably large apparatus because the large page turning apparatus is configured to move in the upper space of the book document.

In addition, since these conventional proposals relate to a method or means for reading only a book original, the technology is applied as it is to an ADF that automatically feeds a sheet original, and a single apparatus is used to read a sheet. It has been impossible to selectively and automatically feed both a manuscript and a book manuscript.

As described above, at this stage, a document reading apparatus having both an automatic document feeding function of an automatic document feeding apparatus of a sheet document and an automatic page turning reading function of a book document is provided in one apparatus. Has not yet been proposed.

The present invention has been made in view of the above points,
Its purpose is to provide a small original reading device that has both an automatic sheet feeding function (ADF mode) or at least one of the platen modes and an automatic page turning reading function for book originals. To provide.

(Means for Solving the Problems) According to the present invention, in a document reading apparatus provided with document reading means capable of reading a document, a detecting means for detecting a reading start position of a document set at a reading position; A first document reading mode in which reading is started from a reading start position detected by the detecting unit;
Setting means for selectively setting a second document reading mode for starting reading from a predetermined reading start reference position, and reading of a document by the document reading means in accordance with the mode set by the setting means And a control means for controlling the position at which the start is performed.

(Operation) According to the present invention, both the ADF mode or the pressure plate mode of the sheet document and the automatic page turning reading operation of the book document are performed by one apparatus.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

However, the configuration and operation of the range that can be clearly recalled from the description of the present specification, and the above and other objects and novel features of the present invention are omitted from illustration and disclosure in order to avoid complication of description. Or simplify it.

First, with reference to FIG. 1, the configuration around the turn-over transport belt in the document reading apparatus according to the present invention will be described.

FIG. 1 is a schematic sectional view of a multi-function document scanner A (hereinafter, referred to as "MFDS") embodying the present invention.

In FIG. 1, a turning transport belt 8 includes a driving roller.
12, the tension roller 13, the first belt support roller 97, the second belt support roller 98, the third belt support roller 99, the fourth
Belt support roller 100 and fifth belt support roller 101
Supported by

At this time, the turning conveyance belt 8 is turned by the turning roller 2 of the page turning reading unit 1, the first bias roller 3,
The page-turning reading unit 1 is supported via a first roller 4, a second roller 5, and a pressing roller 6.

The tension roller 13 is a belt tension spring.
In FIG. 1, the sheet is pulled to the left in FIG. 1 to apply an appropriate tension to the turn-over transport belt 8 and press the original surface of the book original 92.

The belt tension sensor 32 detects the tension of the turning transport belt 8 from the amount of movement of the tension roller 13.

On the other hand, a sheet document tray 94 for setting a sheet document 200 and a sheet document 20
A sheet document side guide 93 for adjusting the set position in the side direction of 0 and a discharge tray 23 on which the discharged sheet document 200 is placed are provided.

A sheet document sensor 2 for detecting the presence or absence of a sheet document 200 is provided in a sheet feeding unit 21 (upper right in FIG. 1) of the MFDS.
5 and paper feed rollers that separate and feed sheet documents 200 one by one
96, a paper separation pad 95, and a paper feed sensor 26 for measuring the paper feed timing of the sheet document 200, and further, a first conveyance guide 1 forming a conveyance path of the sheet document 200.
08 and a second transport guide 109 are provided.

Further, a second bias roller 11 for charging when the sheet document 200 is transported is provided outside the turn-over transport belt 8 slightly to the left of the belt support roller 97, and a bias opposite roller for support is provided inside the second bias roller 11. There are 102.

In addition, the lower end of the second transport guide 109 has a transport guide claw 1
15 to assist the conveyance of the sheet document 200.

Further, the fourth belt supporting roller 100 has a sixth opposing roller 105, and the fifth belt supporting roller 101 has a seventh opposing roller 10.
6. The discharge roller 107 is disposed on the drive roller 12 outside the turnover conveyance belt 8 with the turnover conveyance belt 8 interposed therebetween.

A third transport guide 110 that constitutes a transport path for the sheet document 200 is provided outside the turning transport belt 8 from the third belt support roller 99 to the drive roller 12.

Here, between the second belt support roller 98 and the third belt support roller 99, a document placing surface 116 on the upper surface of the document table 18 is provided.
Are used as a conveyance path for the sheet document 200.

The original placing surface 116 is pre-scanned to
When detecting the size of 2, the book original 92 is formed in black so that the leading end of the book original 92 can be easily detected.

On the other hand, in the first, in the paper discharge unit 22 of the upper left MFDS, a paper discharge sensor 28 is provided in front of the paper discharge roller 107, and detects the presence or absence of a jam when the sheet document 200 is discharged.

Further, a discharge separation claw 111 is formed below the discharge port 117 of the discharge section 22 to assist the smooth discharge of the sheet document 200.

On the document table 18 of the MFDS, a fourth opposing roller 103 is disposed below the second belt supporting roller 98, and a fifth opposing roller 104 is disposed below the third belt supporting roller 99, respectively. A first opposing roller 15 is provided below the turning roller 2 when 1 is at the home position 1-A.
A second opposing roller 16 is provided below the pressing roller 6, and a second reading sensor unit 14 below the first reading sensor unit 9 is provided.

Further, when the page turning reading unit 1 is at the end position position (stop position of the page turning reading unit 1 in the reading mode of the sheet document 200) 1-C, the third reading sensor unit 9 has a third lower side. A book size upper limit sensor 33 is disposed below the opposing roller 17 and below the turning roller 2.

Further, a central reference positioning portion 24 for determining the mounting position of the book original 92 is formed at the center of the original mounting surface 116.

The center reference positioning section 24 has a center positioning plate 113 which abuts on the back of the book document 92 in a state where the book document 92 is placed, and a center positioning plate for giving a rising behavior to the center positioning plate 113. A spring 114 and a book original sensor 27 for detecting the amount of downward displacement of the center positioning plate 113 when the book original 92 is placed are provided, respectively.

A stand 91 for supporting the MFDS substantially horizontally is provided below the document table 18 configured as described above.

On the other hand, on both sides of the portion of the transport unit 19 that contacts the platen 18,
Transport lock device 140 with transport lock sensor 31 built-in
Are provided to detect the open / closed state of the transport unit 19 and the document table 18.

As described above, the MFDS is configured as a document reading apparatus having both the functions of automatic document feeding and reading of the sheet document 200 and the functions of reading a book document and automatic page turning.

Next, a configuration of a drive system in the document reading apparatus will be described with reference to FIGS.

 FIG. 2 is a schematic cross-sectional view of a drive system of the MFDS.

 FIG. 3 is a schematic plan view of a drive system of the MFDS.

FIG. 4 is a perspective view of an end of the page turning reading unit 1.

2 to 4, the page turning reading unit 1 is a scanning pipe of a turning unit driving plate 49.
51 is inserted into a pair of scanning rods 50 laid horizontally parallel to the front side and the back side of the MFDS,
Are slidably supported along the left-right direction.

Each scanning rod 50 is connected to the right side plate 58 of the transport section of the MFDS.
And the transport unit left side plate 59, the respective ends are fixed.

As shown in FIG. 3, a first shaft 64 and a second shaft 65 are provided between the transport unit front side plate 56 and the transport unit rear side plate 57.
And are rotatably supported respectively.

A drive pulley 62 and a driven pulley 63 are provided on the first shaft 64 and the second shaft 65 on the front side and the rear side, respectively.
Each one is fixed and these drive pulleys
Two turning unit drive belts 52 are suspended from the pair of the pulley 62 and the driven pulley 63.

This page-turning reading unit 1 is shown in FIGS.
As shown in the figure, the driving belt fixing plate 53 and the driving belt fixing screw 54
The turning unit driving belt 52 is fixed by 55 and driven by the turning unit driving belt 52 rotating.

Further, a first gear 66 is fixed to the first shaft 64 on the back side thereof with the rear plate 57 of the transport portion therebetween.
The gear 66 meshes with the second gear 67 fixed to the output shaft of the turning unit drive motor 60, whereby the rotation of the turning unit drive motor 60 is transmitted, and the driving pulley 62, the turning unit drive belt 52, the driven pulley 63, and The page turning reading unit 1 is driven.

On the other hand, as shown in FIG.
0, a fourth shaft 122 coaxially fixed to the drive roller 12, a seventh shaft 125 coaxially fixed to the paper feed roller 96, and a fourth shaft 122 coaxially fixed to the first belt support roller 97. The eight shafts 126 are rotatably supported between the transport unit front side plate 56 and the transport unit rear side plate 57, respectively.

A third gear 68 is fixed to the fourth shaft 122 on the rear side with the transport unit rear side plate 57 interposed therebetween.

The fourth gear 69 and the fifth gear 73 are coaxially fixed and rotatably supported.

Further, the sixth gear 74 fixed to the output shaft of the turn-over conveyance belt drive motor 61 is connected to the fifth gear 73 and the fourth gear 69.
Are in mesh with the third gear 68, respectively, and sequentially transmit the rotation of the turn-over conveyance belt drive motor 61, and
Is driven to turn the transport belt 8.

Also, as shown in FIGS. 2 and 3, the eighth shaft
126, a second paper feed pulley 130
However, first feed pulleys 129 are fixed to the seventh shaft 125 on the rear side of the transport unit rear plate 57 via a feed clutch 128, respectively. Pulley 1
At 29, a paper feed drive belt 127 is suspended.

As a result, the rotation of the first belt support roller 97 rotated by the rotation of the turning transport belt 8 is changed to the rotation of the eighth shaft
126, a second paper feed pulley 130, a paper feed drive belt 127, and a first paper feed pulley 129, which are sequentially transmitted to an input side of a paper feed clutch 128.

Further, the paper feed clutch 128 is operated by the control signal sent from the main control board 310 (see FIG. 29), and the seventh shaft 125 and the paper feed roller 96 are driven.

On the other hand, the first opposing roller 15, the second opposing roller 16, and the third opposing roller 17 shown in FIG. 1 are synchronized with the turning-over conveyance belt 8 by a drive transmission mechanism (not shown) and have the same peripheral speed. , Respectively.

Next, the configuration of the page turning reading unit 1 will be described with reference to FIGS.

1 to 4, the first turning unit side plate
The first turn-over unit side plate 41 and the second turn-over unit side plate 41 are arranged opposite to each other at a position sandwiching the turn-over transport belt 8. Turning roller 2, first bias roller 3, first roller 4, second roller 5, and pressing roller 6
Are rotatably supported.

The support structure of each of these rollers is the same.

Therefore, the first roller 4 will be described by way of example. As shown in FIG. 5, the first roller 4 has a first turning unit side plate 40 and a second turning unit side plate 41, both ends of which are fixed to both ends. The fifth shaft 123 is inserted into the hollow portion of the first roller 4 formed of a hollow shaft, and both ends of the first roller 4 are supported by a pair of bearings 131 disposed on the fifth shaft 123. Thereby, it is rotatably supported by the fifth shaft 123.

Here, the turning roller 2, the first bias roller 3, the first roller 4, the second roller 5, and the pressing roller 6 do not rotate by themselves, but are rotated only by the rotation of the turning transport belt 8. .

Further, outside the first turning unit side plate 40 and the second turning unit side plate 41, a rotation supporting rod 42 is provided at an extended position in the longitudinal direction of the first reading sensor unit 9 shown in FIG.
(Both sides are configured identically) are rotatably supported.

Therefore, the support structure of only one side of the rotation support rod 42 will be described. As shown in FIG. 4, the rotation support rod 42 includes a sliding pipe 43, a second spring stopper 48, and an upper limit detection unit 76. And is configured integrally.

In FIG. 4, the inclination correcting spring 44 is formed by a torsion coil spring, one end of which is fixed to the rotation support rod 42 and the other end of which is fixed to the first turning unit side plate 40, respectively.

When the inclination correction spring 44 is in its natural state, that is, in a state where no external force is applied to the inclination correction spring 44, the axial direction of the sliding pipe 43 (the vertical direction in FIG. 4) and the first reading sensor unit 9 The optical axis direction of the reading optical system (the moving direction of the first reading sensor unit 9 with respect to the first turning unit side plate 40 and the second turning unit side plate 41 (which will be described later in detail)) is made to match.

Accordingly, when the first turning unit side plate 40 and the second turning unit side plate 41 rotate integrally with each other about the respective rotation support rods 42, the inclination correcting spring
The first turning unit side plate 40 and the second turning unit 41 act on the first turning unit side plate 40 and the second turning unit side plate 41. The inclination of the side plate 41 is corrected as needed.

Further, as shown in FIG. 4, the sliding pipe 43 is configured to smoothly slide with respect to the sliding support rod 46.

The upper end of this sliding support rod 46 is an upper rod support plate 70
The lower end of the sliding support rod 46 is fixed to the lower rod support plate 71, respectively.

The first rod stopper plate 70 has a first spring stopper claw.
47 has a second spring stopper 48 on the upper part of the sliding pipe 43.
The first spring stopper 47 and the second spring stopper 48 allow the turning unit vertical spring 45 mounted between the sliding pipe 43 and the upper rod support plate 70 to be pivoted. Both ends are locked respectively.

Here, the sliding pipe 43 is in contact with the lower rod support plate 71 in a normal state. However, when the page turning reading unit 1 receives an external force, the sliding pipe 43 resists the elasticity of the turning unit vertical spring 45 and slides. Along the moving support rod 46, it slides upward in FIG.

At this time, the second spring stopper claw is attached to the sliding pipe 43.
The above-described sliding force for returning to the normal state is exerted by the elasticity of the turning unit vertical spring 45, which always presses the downward direction.

Further, the sliding range of the sliding pipe 43 in the upward direction is determined in a state where the scan cutoff sensor 34 arranged on the turning unit drive plate 49 detects the upper limit detecting unit 76 provided on the sliding pipe 43. The sliding position above the sliding pipe 43 is set to be the limit position.

On the other hand, as shown in FIG. 4, the turning unit drive plate 49 includes an upper rod support plate 70, a lower rod support plate 71, a first spring stopper 47, a scanning pipe 51, a drive belt fixing unit 53, and a home detection unit. It is formed integrally with the filler 75.

Further, as described above, the drive belt fixing portion 53 of the turning unit driving plate 49 is connected to the turning unit driving belt 52 by the driving belt fixing plate 54 and the driving belt fixing screw 55.
It is fixed to.

Further, the scanning pipe 51 of the turning unit driving plate 49 is fitted to the scanning rod 50 so as to slide smoothly.

Thereby, as described above, the turning unit drive belt 52 is driven, and the page turning reading unit 1
When the home position 1-A is reached, the home position sensor 30 shown in FIG. 3 detects the home detection filer 75 of the scanning pipe 51.

Next, with reference to FIGS. 6 to 8, a description will be given of the configuration of the transport unit locking device in the document reading device.

6 to 8 are schematic diagrams showing one configuration of the transport unit locking device 140 (the configuration is the same on both sides) disposed on both sides of the MFDS.

The transport unit locking device 140 includes an unlocking solenoid 1
32, and a lock rod 134 and the like.

The lock release solenoid 132 is connected to one end of the lock release solenoid arm 133.

The other end of the unlocking solenoid arm 133 is
It is rotatably supported on one end of 34.

An electromagnetic lock 141 is arranged on the side of the back of the lock rod 134 facing the lock release solenoid arm 133.

On the other end of the lock rod 134, a lock claw 134a is formed, which has a lock release solenoid arm 133 disposed therein and is bent toward a key claw.

The lock rod 134 is rotatably supported by a rotating part 136. The upper part of the rotating part 136 is
Is connected to one end.

The other end of the lock spring 135 is connected to a part of the transport unit 19, and thereby, with respect to the lock rod 134,
In FIG. 6, the behavior of turning in the clockwise direction is given.

The rotation of the lock rod 134 due to the rotation behavior is prevented at a predetermined angle by a lock claw stopper 137 arranged on the lower left side of the rotation part 136.

On the other hand, a lock pin 139 and a lock section 138 on which the transport section lock sensor 31 is arranged are formed on the document table 18 side.

In FIG. 6, when the transport unit 19 is closed while being pushed down, as shown in FIG.
The lower ends of the 34 lock claws 134a abut, and the lock rod 134 is rotated counterclockwise about the rotating portion 136 as a rotation axis.

When the transport unit 19 is further closed from this state, the eighth
As shown in the figure, the lock claw 134a of the lock rod 134 is hooked on the lock pin 139, and the transport unit 19 is fixed to the document table 18.

When the transport unit 19 is locked, the lock rod 134 is locked.
The transport unit lock sensor 31 is operated by the lock claw 134a.

The unlocking of the transport unit 19 is executed by pressing the open key 620 of the operation display board 313 shown in FIG.

That is, when the open key 620 of the operation display board 313 is pressed, the lock release solenoid 132 is operated, and the lock rod 134 rotates counterclockwise about the rotation unit 136 as a rotation axis, and the lock rod 134 The lock claw 134a is released, and the transport unit 19
Is opened upward (see FIG. 10).

However, the open key 620 is programmed so that it does not operate (does not accept input) during a series of page turning scans of the book document 92, during scanning, and during conveyance of the sheet document 200. .

When the open key 620 does not receive an input, the electromagnetic lock 141 is activated, and the electromagnetic lock 141 causes the lock claw 134a to remain engaged with the lock pin 139, thereby causing the lock rod 134 to move. The rotation is restricted.

The MFDS configured as described above is used, for example, mounted on the upper part of a printer 300 as shown in FIGS. 9 and 10.

FIG. 10 shows a state in which the transport unit 19 of the MFDS is opened as described above.

Next, the configuration of the first reading sensor unit 9 inside the page turning reading unit 1 in the document reading apparatus will be described with reference to FIGS. 11 to 13.

FIG. 11 is a perspective view of the vicinity of the end of the first reading sensor unit 9, FIG. 12 is a side view of the vicinity of the end of the first reading sensor unit 9, and FIG.
3 is a detailed cross-sectional view of an end portion of FIG.

Since both ends of the first reading sensor unit 9 have the same configuration, only the configuration of one of them will be described here.

As shown in FIG. 11, the first reading sensor unit 9 has a U-shaped reading sensor bracket 14.
The upper part is covered by 6, and is arranged to be vertically movable with respect to the reading sensor bracket 146.

The reading sensor bracket 146 is integrally formed with the page turning reading unit 1 by fixing both ends thereof to the first turning unit side plate 40 and the second turning unit side plate 41.

A reading sensor stud 148 is fixed downward slightly inside the end of the reading sensor bracket 146.

The lower end of the reading sensor stud 148 is fitted to a boss 149 formed at the end of the first reading sensor unit 9, as shown in FIG.

Thus, the first reading sensor unit 9 is supported by the reading sensor bracket 146 via the reading sensor stud 148 so as to be vertically movable.

Here, the reading sensor stud 148 and the boss 149 are
The reading sensor stud 148 has a flange-shaped hooking portion formed at the lower end thereof so that the fitting is not disengaged.

A reading sensor spring 147 is mounted between the base of the reading sensor stud 148 of the reading sensor bracket 146 and the base of the boss 149 of the first reading sensor unit 9. The first reading sensor unit 9 is biased downward by the force.

As a result, the first reading sensor unit 9
It is always located at the lowermost part of the page turning reading unit 1 and, for example, when an external force is applied due to unevenness on the surface of the book original 92, the book original is not opposed to this external force.
It is moved up and down smoothly along the irregularities on the surface of 92.

In addition, an end of the first reading sensor unit 9 has
As shown in FIG. 11, a read sensor release solenoid 150 is mounted via a read sensor release solenoid arm 151.

As shown in FIG. 12, the reading sensor release solenoid 150 is fixed to the first turning unit side plate 40, and the page turning reading unit 1 is moved without performing the original reading operation by the first reading sensor unit 9. For example, at the time of page turning operation, at the time of idle scanning of a non-read page, and at the time of returning to the sheet original scan mode, the reading sensor release solenoid 150 is operated.

When the reading sensor release solenoid 150 is operated, the first reading sensor unit 9 is moved upward against the elasticity of the reading sensor spring 147, and the original scanning surface is retracted (separated) from the surface of the original. .

The first reading sensor unit 9 uses a signal of the encoder 152 generated by the rotation of the turning roller 2 as a reference signal for reading the image.

The turning roller 2 and the encoder 152 are configured as shown in FIG.

FIG. 14 shows a side view of the back side of the turning roller 2. As shown in FIG.

In FIG. 14, at the end on the back side of the turning roller 2,
A filler 153 formed in a crown shape is provided.

The filler 153 is formed by forming equally spaced slits of the same width on the circumference.

The encoder 152 is fixed to the second turning unit side plate 41 so as to sandwich the filler 153 up and down.

Thereby, the encoder 152 is connected to the turning roller 2.
The filler 153 periodically blocks the detection optical path of the encoder 152 in accordance with the rotation of the first rotation sensor, thereby generating a reference signal for image reading of the first reading sensor unit 9.

On the other hand, the positioning of the book document 92 with respect to the platen 18 is
This is performed by the center reference positioning unit 24.

FIG. 15 shows a detailed cross-sectional view of the center reference positioning portion 24.

The center reference positioning unit 24 is a reference position at the time of reading scanning of the book document 92 and at the time of scanning turning pages.

The center reference positioning section 24 is formed in a groove formed at the center of the document placing surface 116.

In this groove, a central positioning plate 113 is provided.
Are fitted to be able to move up and down.

The center positioning plate 113 is always given an ascending habit by a center positioning spring 114 disposed below the center positioning plate 113.

The upward movement of the center positioning plate 113 due to this habit is caused by a stopper 118 formed at the edge of the groove of the document placing surface 116.
15 is stopped by the stopper pawl 119 of the center positioning plate 113 abutting, and is stopped at a position indicated by a broken line in FIG.

The book manuscript 92 is set on the manuscript placing surface 116 and the spine (binding portion) of the book manuscript 92 is placed on the center positioning plate 113 in the groove.
Is carried out.

That is, when the spine (binding portion) of the book document 92 is placed on the center positioning plate 113 in the groove, the book document 92
, The center positioning plate 113 is pushed down.

As a result, the book document sensor 27 arranged on the side of the document mounting surface 116 in the groove detects the movement of the center positioning plate 113, and the set of the book document 92 is recognized.

By the way, an operation display board 313 of the MFDS is disposed on the entire surface of the document table 18 (see FIGS. 9 and 10).

On the operation display board 313, a number of input keys are arranged as shown in FIG.

 Hereinafter, the functions of these input keys will be described in order.

The start key 600 is pressed when instructing to start reading a document.

An enter key 601 is depressed when confirming the input in a ten-key input or a selection input on the liquid crystal display panel.

A numeric keypad 602 is used to set the number of prints of a document, the number of pages turned, and the like.

The reading start page selection key 603 is used for the “left” /
A key for selecting from which page “right” reading is to be started. Each time this key is pressed once, the reading start page of the book document 92 is switched between left and right.

The read start page at the time of initial setting of this key is set to the “left” page, and whether the read start page selected by this key is the left or right of the book original 92 is determined by two read start pages. Display LED 631
Is displayed depending on which is lit.

The read total page setting key 606 is pressed to set the total number of pages to be read when inputting the number of pages to be turned in the book original reading mode.

The total number of read pages of the book original 92 is determined by pressing the read total page setting key 606, inputting the number of pages using the numeric keypad 602, and then pressing the enter key 601. LCD panel
Displayed on 630.

The book size selection key 607 is pressed to select either “automatic book size recognition mode” or “book size key input mode” in the book document reading mode.

Each time this key is pressed once, the display of the book size display LED 632 changes to “Auto”, “Standard”,
Input) ", and this book size display LE
The mode displayed by D632 is selected.

The display of the book size display LED 632 at the time of initial setting of the book size selection key 607 is "automatic",
"Automatic book size recognition mode" is selected.

Here, the book size key input mode is set to
And "irregular shape (mm input)".
Only in the case of A5, B5, and A4, by selecting "Standard", the book size can be input using the standard book size selection key 619.

Each time the standard book size selection key 619 is pressed once, the standard book size display LED 633 displays "A5"
The order is switched to "B5" / "A4", and the selected book size is displayed and recognized.

At the time of initial setting of this standard book size selection key 619,
The display of the fixed-size book size display LED 633 is "A4".

However, the book size here refers to the size of the cover of the book document 92.

Here, when the book original 92 is not in the above-described standard book size, the book size selection key 607
Select "Undefined (mm input)" and use the numeric keypad 602 to set the vertical size and horizontal size (mm
After inputting each unit, the user presses an enter key 601 to determine the book size.

When the size of the book document 92 is determined in this way, the input size value is displayed on the liquid crystal display panel 630.

The book binding section mask area setting key 608 is used to set the non-read area (mask area) from the center of the center reference positioning section 24 to “left (−)” or “right (+)” in the book original reading mode. The button is pressed to set which one.

That is, when forming a mask area in the book binding portion of the book original 92, first, the book binding section mask area setting key 608 is used to set which of the left and right pages of the book original 92 to form a mask area, and then After inputting the length (in mm) of the set “left mask area (−)” or “right mask area (+)” by using the ten keys 602, the input value is determined by the enter key 601. .

When the mask area of the book document 92 is determined in this way, the input value is displayed on the liquid crystal display panel 630.

The value of the mask area at the time of initial setting of the book binding section mask area setting key 608 is “± 10 mm”.

A reading area selection key 609 is used to set the reading area of the book document 92 to one of “single page (left)”, “single page (right)”, and “both pages” in the book document reading mode. Pressed when selecting.

Each time the reading area selection key 609 is pressed once,
The reading area display LED 636 indicates “single page (left)”
Switching is performed in the order of “one page (right)” and “both pages”, and the selected reading area is displayed and recognized.

When the reading area selection key 609 is initially set, the display of the reading area display LED 636 is “both pages”.

Here, when “single page (left)” is selected, only the left page of the book document 92 is scanned and the right page is not scanned.

If “one page (right)” is selected, reading scanning of only the right page toward the book document 92 is performed, and reading scanning of the left page is not performed.

The double-page spread key 610 is pressed when instructing to print out the read document information at the same magnification in the "two-page spread continuous reading mode" of the book document reading mode and the "two-sided mode". Is done.

The double-page spread continuous reduction key 611 is used to instruct to print out the read document information at a reduced magnification in the “two-page continuous reading mode” of the book document reading mode and the “double-sided mode”. Pressed.

At this time, the setting of the reduction magnification of the document information is performed by operating the print scaling key 614.

The reference reduction ratio at the initial setting of the double-page spread reduction key 611 is “Original size × 0.71 (A3 → A4 / B
4 → B5) ”.

A double-sided mode selection key 612 is used to select which side should be turned upside down and which side should be printed when the book original reading mode is set to the “double-sided mode” of the “spread one page separation reading mode”. , "Facing double-sided mode"
-"Original duplex mode"-"Sequential duplex mode"
Pressed when selecting from two duplex modes.

Each time the double-sided mode selection key 612 is pressed once, the display of the double-sided mode display LED 634 changes to “spread double-sided mode”.
Switching is performed in the order of “original duplex mode” / “sequential duplex mode”, and the selected reading area is displayed and recognized.

When the duplex mode selection key 612 is initially set, the display of the duplex mode display LED 634 is "Original duplex mode".

Here, when the “spread two-sided mode” is selected, of the left and right pages of the spread book document 92, the left page is turned up and the right page is turned over, and duplex printing is executed.

At this time, with the reading start page selection key 603,
When the reading start page of the book document 92 is set to “right”, the first print of the first page is a single-sided print.

When the “original double-sided mode” is selected, the right page is turned out of the left and right pages of the opened book original 92, and the left page of the next page turned by the page turning operation is displayed. , The two-sided printing is executed.

In other words, in the “original double-sided mode”, the book is printed in exactly the same manner as the binding of the book document 92 to be read.

At this time, with the reading start page selection key 603,
When the reading start page of the book document 92 is set to “right”, the same as in the case of “two-sided spread mode”,
The first print of the first print is a one-sided print.

Further, when the “sequential double-sided mode” is selected, the page set by the reading start page selection key 603 out of the left and right pages of the opened book original 92 is turned into a table, and the page turning operation is performed. With the next page turned upside down, double-sided printing is subsequently performed in the order of sequential reading.

The double-page spread high-speed print setting key 613 slows down the operation of the page turning reading unit 1 near the binding portion of the book document 92 in the “single-sided mode” of the “two-page spread continuous reading mode” of the book document reading mode. Alternatively, the button is depressed when the reading scan is continuously performed without stopping and the continuous printing of both the left and right pages of the book document 92 is instructed.

The print scaling key 614 is a key for setting the scaling when the read image is scaled and printed.

When the print scaling key 614 is pressed, a preset scaling ratio is displayed on the liquid crystal display panel 630.

Here, the scaling ratio is determined by moving the cursor to a desired scaling ratio with the cursor movement key 617 and then pressing the enter key 601.

An image processing setting key 615 is a key for setting an image processing mode when a read image is processed and printed.

When the image processing setting key 615 is pressed, a preset image processing mode is displayed on the liquid crystal display panel 630.

Here, the image processing mode is determined by moving the cursor to a desired image processing mode with the cursor movement key 617 and then pressing the enter key 601.

A mode setting selection key 616 is a key for setting an operation mode of the MFDS.

When the mode setting selection key 616 is pressed, a preset MFDS operation mode is displayed on the liquid crystal display panel 630.

Here, the operation mode of the MFDS is determined by positioning the operation mode cursor of the desired MFDS and then pressing the enter key 601.

The cursor movement key 617 is a key for moving a cursor to each selection area displayed on the liquid crystal display panel 630.

A read skip page setting key 618 is a key for setting a page to be skipped without performing reading scan in the book document reading mode.

That is, when there is a page to be skipped without executing the original reading scan among the pages of the book original 92, first, the read skip page setting key 618 is used.
Is pressed, and then the number of the page to be skipped (skip page) of the book manuscript 92 from the reading start page is input using the numeric keypad 602, and then the enter key 601 is pressed, and the skip page is pressed. Confirm.

The skip page thus input is displayed on liquid crystal display panel 630.

A standard book size selection key 619 is a key for selecting the book size of the book original 92.

As mentioned above, the book size key input mode is
There are "fixed form" and "unfixed form (mm input)". Book size by this fixed form book size selection key 619 by selecting "fixed form" only when book size is A5 / B5 / A4 Can be input.

Each time the standard book size selection key 619 is pressed once, the standard book size display LED 633 displays "A5"
The order is switched to "B5" / "A4", and the selected book size is displayed and recognized.

At the time of initial setting of this standard book size selection key 619,
The display of the fixed-size book size display LED 633 is "A4".

However, the book size here refers to the size of the cover of the book document 92.

The open key 620 is pressed when opening the transport unit 19 of the MFDS.

The sheet original set selection key 625 is used to set the original surface of the sheet original 200 set on the original placing surface 116 to “upward” in the “single-side original reading mode” of the “sheet original through mode” in the sheet original reading mode. -A key for selecting any of "downward".

Each time the sheet document set selection key 625 is pressed once, the display of the sheet document set display LED 635 changes to “upward”.
The display is switched in the order of “downward”, and the selected sheet document setting surface is displayed and recognized.

At the time of initial setting of this sheet original set selection key 625,
The display of the sheet document set display LED 635 is “upward”.

Next, the printer 300 shown in FIGS. 9 and 10 will be described.

 FIG. 17 shows a schematic sectional view of the printer 300.

The image information after the image processing is written on the photosensitive drum 170 in the form of a set of light points by raster scanning of laser light in a writing unit of the printer 300.

A semiconductor laser is used as the laser light source at this time. FIG. 18 is a plan view of a writing section of the printer 300.

In FIG. 18, a laser beam emitted from a semiconductor laser 171 is converted into a parallel beam by a collimator lens 172, and is shaped into a beam having a constant shape by an aperture 173.

The shaped beam is applied to the first cylinder lens 174
As a result, the light enters the polygon mirror 175 in a compressed form in the sub-scanning direction.

The polygon mirror 175 has an accurate polygonal shape and is rotated by a polygon motor 176 in a certain direction at a certain speed.

The rotation speed of the polygon mirror 175 is
It is determined by the speed of 70, the writing density, and the number of faces.

The reflected laser light incident on the polygon mirror 175 is deflected by the rotation of the mirror.

The deflected laser light is applied to each fθ lens 177a, 177b,
It is incident on 177c.

Lenses 177a, 177b, and 177c have a function of converting scanning light having a constant angular velocity so as to scan at a constant speed on the photosensitive drum 170. The scanning light has a minimum light spot on the photosensitive drum 170. And a function of correcting the tilt of the image.

The light that has passed through each of the fθ lenses 177a, 177b, and 177c,
After a synchronizing signal for outputting a cue signal in the main scanning direction is output to the device 79, image data for one line is output after a certain period of time, and thereafter, this is repeated to form one image.

On the other hand, a photosensitive layer is applied to the surface of the photosensitive drum 170.

Here, as the photoconductor having sensitivity to the wavelength of 780 nm of the semiconductor laser 171, an organic photoconductor (OPC), α-Si, S
Although e-Te and the like are known, in this embodiment, an organic photoreceptor is used.

In general, in the case of laser writing, there are an N / P process that shines light on an image portion and a P / P process that shines light on a background portion. In this embodiment, as the laser writing process, light is applied to the image portion. Adopts N / P process.

In FIG. 17, the surface of the photosensitive drum 170 is uniformly negatively charged by a scorotron-type charging charger 180 in which the photosensitive drum 170 has an alligator grid.

Next, when the image portion of the negatively charged photosensitive drum 170 is irradiated with laser light to lower the potential of the image portion, the surface potential of the background of the photosensitive drum 170 is reduced by -750.
An electrostatic latent image of about -800 V and an image portion potential of about -50 V is formed.

This electrostatic latent image is applied to the developing roller of
By applying a bias voltage of -600 V, the image is visualized by the negatively charged toner.

The image visualized by the developing device 181 is transferred to a transfer charger 182 which applies a positive potential charge from the back side of the transfer paper onto the paper surface of the transfer paper fed in synchronization with the rotation of the photosensitive drum 170. Is transcribed by the transcription action of

The transfer paper on which this image has been transferred is the transfer charger 182
The photosensitive drum 170 is separated from the surface of the photosensitive drum 170 by being subjected to AC static elimination by a separation charger 183 held integrally with the photosensitive drum 170.

At this time, the photosensitive drum 170 is not transferred to the transfer paper.
The remaining toner is scraped off the surface of the photosensitive drum 170 by the cleaning blade 184, and is collected in a tank 185 disposed around the cleaning blade 184.

In addition, the pattern of the potential remaining on the surface of the photosensitive drum 170 is erased by irradiating light with the charge removing lamp 186.

A photo sensor 187 is provided immediately downstream of the developing device 181.

The photo sensor 187 includes a light receiving element and a light emitting element, measures the reflection density of the surface of the photosensitive drum 170, and sets the reflection density (toner density after development) to be equal to or less than a predetermined reference value. When this happens, a toner supply signal for supplying new toner into the developing device 181 is output.

That is, the photosensor 187 writes, for example, a fixed pattern (pure black or halftone dot pattern) at a position corresponding to the reading position of the photosensor 187 by the optical writing unit, and develops this pattern. Of the photoreceptor drum 17 outside the pattern
The density of the developed image is determined from the ratio with the light reflectance of 0, and a toner supply signal is output when the density of the image is lower than its reference value.

If there is a shortage of new toner,
The photosensor 187 may be configured to also serve as a sensor for detecting the shortage of the remaining amount of toner by utilizing the point that the development density does not increase even when the toner supply signal is output.

On the other hand, the printer 300 of this embodiment has a plurality of cassettes 188.
a, 188b, and is configured such that the transfer paper on which the image has been transferred once can be fed on both sides through the refeed loop 189.

That is, in FIG. 17, when a start button of the printer 300 is pressed after a predetermined cassette is selected,
A selected roller among the paper feeding rollers 190a and 190b of each of the cassettes 188a and 188b is rotated, and the transfer paper in the cassette is fed until it hits the nip of the registration roller 191.

The registration roller 191 starts rotating at a timing at which the position of the image formed on the photosensitive drum 170 and the position of the transfer paper are synchronized, and feeds the transfer paper toward the surface of the photosensitive drum 170. Send.

Thus, as described above, the transfer paper is transferred with an image, further separated from the surface of the photosensitive drum 170, and then suction-conveyed to the separation conveyance unit 192, where the heat roller 1
The toner transferred onto the paper surface is fixed by a fixing roller composed of 93 and a pressure roller 194.

The transfer paper to which the toner has been fixed, at the time of normal printing, the switching claw 195 faces the position as shown in FIG. Is discharged on top.

Here, when the print mode of the printer 300 is the “double-sided mode”, the switching claw 195 is switched to the position shown in FIG. 19B, and is directed toward the double-sided conveyance path formed on the left side of the printer 300. The transfer paper is conveyed.

This transfer paper passes through the reversing guide claws 196 and temporarily
After being guided onto the reversing guide tray 197, the reversing guide claws 196
Is switched and the reversing guide roller 198 is rotated in the reverse direction (reversed), so that the sheet is fed again through the re-feeding loop 189 until it comes into contact with the nip of the registration roller 191 again.

The transfer paper re-fed in this way is transferred and fixed to the toner image formed on the photosensitive drum 170 in the same manner as in the normal printing described above, and then the transfer paper shown in FIG.
The paper is discharged onto the paper discharge tray 169 via the switching claw 195 switched to the initial state shown by.

Here, in a case where the “back side discharge mode” is set, in which the transfer paper is discharged with the image fixing surface of the transfer sheet at the time of discharge in the single-sided print mode facing the stacking surface of the discharge tray 169, As in the case of the above-mentioned "double-sided mode", the switching claw 195 is switched to the position shown in FIG. 19B, and the transfer sheet is once conveyed toward the double-sided conveyance path without being discharged as it is. You.

Then, immediately after the rear end of the transfer sheet passes through the switching claw 195, the switching claw 195 is switched to the position shown in FIG.
The transfer direction guided to the two-sided conveyance path is reversed, and the transfer paper is switchback-conveyed and discharged onto the paper discharge tray 169 through the paper discharge port of the printer 300.

In the “back side discharge mode”, the transfer paper printed on one side is discharged onto the discharge tray 169 with its image fixing surface facing the stacking surface of the discharge tray 169, so that the original is read in the read page order. Then, the transfer sheet is discharged in the order in which the print pages of the transfer sheet are arranged. As described with reference to FIG. 4, the page turning reading unit 1 includes the first turning unit side plate 40 and the second turning unit. Between the side plate 41, the turning roller 2,
The first roller 4, the second roller 5, the pressing roller 6, and the first bias roller 3 are provided rotatably.

As shown in FIG. 20, a turning transport belt 8 is stretched over the turning roller 2, the first roller 4, the second roller 5, the pressing roller 6, and the first bias roller 3.

The first bias roller 3 is connected to a first high-voltage power supply 320, and is configured so that AC voltages of respective frequencies for suction and static elimination are respectively supplied from two ports.

Further, inside the page turning reading unit 1, between the turning roller 2 and the first reading sensor unit 9, a turning guide 10 is further provided. The page storage units 7 are respectively provided along the peripheral surface.

A page turning sensor 29 including a photo sensor and the like for detecting an error at the time of turning the page is arranged in the page storage unit 7.

The page turning sensor 29 may be arranged on the page turning guide 10.

Further, between the turning roller 2 and the pressing roller 6, a
As described with reference to FIG. 11, the first reading sensor unit is disposed.

The first reading sensor unit 9 is attached to the page turning reading unit 1 so as to be able to move up and down by about 3 mm. When reading a document, the reading sensor spring 147 pushes the reading sensor spring 147 downward, and the book document 9 is read.
2, or is configured to be in close contact with the document surface of the sheet document 200.

As shown in FIG. 21, the first reading sensor unit 9 includes an LED 316 as a document illumination system, an RMLA81 (roof mirror lens array) as a document image forming system,
In addition, a Si equal-magnification sensor 315 is provided as a photoelectric conversion system that converts a light image of the formed document into an electric signal.

The document reading by the first reading sensor unit 9 is performed as follows.

In FIG. 21, first, the light emitted from the LED 316 is
The bar lens 83 condenses the light on the document surface and illuminates the document.

Next, the reflected light from the original surface is reflected by the optical path separating mirror 84.
Reflected by the LA85 (lens array) and RMA86
(Roof mirror array), again, the optical path separation mirror
Reflected by 84.

The image light of the document reflected by the optical path separation mirror 84 is imaged on the light receiving surface of the Si equal-magnification sensor 315, and the image information imaged on this by the Si equal-magnification sensor 315 is
It is converted into an electric signal and read.

Next, a basic page turning operation in the embodiment of the present invention configured as described above will be described.

First, reading of a document in the present embodiment is performed in the following procedure.

If the original is a book original 92, the operation display board 313
Pressing the open key 620, the transport unit 19 is opened upward as shown in FIG.
Then, the binding section (back) of the book document 92 is set, and the transport section 19 is closed as shown in FIG. 9 with the reading start page of the book document 92 opened upward.

In this state, after operating the respective keys of the operation display board 313 to set the reading conditions of the book original 92, the MFDS is started by pressing the start key 600.

Thereby, as shown in FIG. 1, the turning unit drive belt 52 is driven by the turning unit drive motor 60, and the page turning reading unit 1 moves rightward from the leftmost home position position 1-A. The first reading sensor unit 9 starts reading the document information of the book document 92 by moving the page turning reading unit 1.

At this time, the rotation of the turning-over conveyance belt 8 is stopped, and the document surface of the opened book document 92 is pressed from above.

Further, as described above, the page turning reading unit 1 is rotated about the rotation support rod 42 as a fulcrum, and the slide pipe 43 integrated with the rotation support rod 42 is
By being moved up and down along 46, the book original 92 is moved along the original surface while the first reading sensor unit 9 is brought into close contact with the original surface.

Further, when the page turning reading unit 1 reaches the book document reading middle position 1-B substantially at the center of the book document 91, the first bias roller 3 attracts the first bias roller 3 from the first high voltage power supply 320 shown in FIG. AC voltage is applied to form a stripe-shaped charge pattern on the turn-over transport belt 8.

As described above, the page turning reading unit 1 forms the stripe-shaped charge pattern on the turning conveyance belt 8 while ending the end position 1-C at the right end in FIG.
And the first reading sensor unit 9 reads the document information of the book document 92.

As described above, when reading of the document information of the book document 92 is completed, the page turning reading unit 1
As shown in the figure, the robot is returned from the end position 1-C to the home position 1-A.

At this time, as shown in FIG.
An unequal electric field is generated on the upper side by a charge pattern formed at the time of the reading operation.
And is electrostatically attracted.

Therefore, in this state, the page turning reading unit 1
Is moved toward the end position 1-C, and when the page turning reading unit 1 reaches the turning start position 1-D shown in FIG. 22, this turning conveyance is performed as shown in FIG. Book manuscript with belt 8
The end of the original corresponding to one right page 92 is wound into the page turning reading unit 1.

In this manner, the leading end of the document wound in the page turning reading unit 1 is separated by the curvature of the turning roller 2 and the strength of the waist of the document as the page turning reading unit 1 moves. , And is gradually separated from the turn-over transport belt 8.

In this manner, the document gradually separated from the turn-over transport belt 8 is moved along the turning guide 10 shown in FIG. 20, and the page storage unit 7 disposed downstream in the moving direction of the document. Guided inside.

As shown in FIG. 20, the page storage section 7 is formed in a cylindrical shape, and is extremely formed by winding the document wound in the page turning reading unit 1 along the inner peripheral surface thereof. A document of one page after reading can be stored in a small space.

Therefore, according to the page turning reading unit 1,
As shown in FIG. 22, this page turning reading unit 1
Is the winding completion position 1 from the turning start position 1-D.
By returning to -E, it is possible to very smoothly separate the original of one page after the reading and the original of the next page to be read by the next reading operation.

The document stored in the page storage unit 7 in this manner is
From the winding completion position 1-E, the page turning reading unit 1 moves beyond the center of the book
The left page 92 is further returned and moved toward the page discharge position 1-F, and the original is turned by the relative movement between the page turning reading unit 1 and the original stored therein. The discharge starts from the page storage unit 7 of the page turning reading unit 1.

Then, the page turning reading unit 1 is moved back to its home position 1-A, and when the movement is completed, the document stored in the page storing unit 7 of the page turning reading unit 1 is discharged. Is completed, and the turning operation for one page of the read original is completed.

On the other hand, during the document turning operation, the first bias roller 3 is moved from immediately after the winding of the document to the page storage section 7 of the page turning reading unit 1 is started until the winding of the document is completed. In addition, a program is performed so that the charge pattern formed on the turn-over transport belt 8 is removed by applying an AC voltage for removing electricity from the first high-voltage power supply 320 shown in FIG.

Therefore, at the time of the return movement of the page turning reading unit 1, no electrostatic attraction force is generated between the read original and the transport belt 8 for turning the original. The picking operation and the discharging operation can be performed extremely smoothly.

Conventionally, as an apparatus for holding and transporting a sheet member or the like, an apparatus using an air suction method, an electrostatic suction method using a comb electrode and an electric double layer method, and the like are known.

Further, as a page turning apparatus of a book document, an apparatus using an air suction method or the like has been proposed.

However, since each of these methods has the disadvantages described below, it is almost impossible to put a book-turning apparatus for book pages into practical use based on these methods.

That is, the air suction method requires an air pump that suctions air to generate a negative pressure and an air suction path, and thus has a disadvantage that the size of the device is increased.

Also, in the comb-teeth electrode embedding method, two comb-teeth electrodes are embedded in a dielectric so that each tooth meshes with each other, and a positive electrode and a negative electrode voltage are applied to each electrode. Not only is the cost increased, but also it becomes difficult to form the document turning and conveying belt into an endless belt.

Furthermore, in the electric double-layer system, the belt and the sheet are charged with opposite polarities by corona discharge or the like.
Unless the pages to be turned are separated in advance, charges cannot be charged.

Further, for example, in other page turning methods using a frictional force such as a rubber roller, the page turning accuracy is significantly restricted by the paper quality and size of the book document, so that it is difficult to improve its reliability. .

In contrast, in the embodiment of the present application, FIGS. 20, 23 and
As shown in FIG. 24, an alternating voltage for adsorption is applied from a high-voltage power supply 320 to the turning transport belt 8, which is an endless belt, and an alternating stripe-shaped charge pattern is formed on the surface of the turning transport belt 8. By forming, a non-uniform electric field is generated in the turning conveyance belt 8 to carry out the holding conveyance of the light source and the page turning.

Therefore, according to this page turning method, it is possible to carry out the holding and conveying of the document and the page turning operation extremely smoothly.

Below, the basic configuration of this page turning method,
The principle of electrostatic attraction will be described.

As the turning transport belt 8 used in the page turning method, a two-layered belt obtained by applying a conductive treatment to the back surface of a dielectric formed in an endless belt shape was used.

As means for applying an alternating voltage to the turnover conveyor belt 8, the first bias roller 3 rotatably supported by bringing the peripheral surface into contact with the surface of the turnover conveyor belt 8 may be used. An AC voltage for adsorption was applied by a high voltage power supply 320.

As shown in FIG. 20 and FIG.
The turnover conveyor belt 8 and the first bias roller 3 are relatively moved while an alternating electric field is applied to the first bias roller 3 with the conductive layer 8b of the turnover as a ground plane, thereby forming a dielectric material of the turnover conveyor belt 8. A stripe-shaped charge pattern is formed on the surface of 8a.

As a result, an unequal electric field is generated in the vicinity of the surface of the dielectric 8a of the turning transport belt 8.

When a dielectric such as paper to be read is brought close to the unequal electric field, the inside of the paper is polarized, and the electric field is unequal. work.

This is evident by maximizing the stress over the surface of the paper and dividing the area.

Here, the stress of maxwell is It is represented by

Further, assuming that the direction of the normal to the surface of the turn-over transport belt 8 is the X axis, the stress of maxwell in the X-ray direction Equation (b) expressed by

Next, along the outer surface (upper and lower surfaces) of the paper, this (b)
By dividing the stress fx of the maxwell in the X-axis direction represented by the formula by the area, the object force (attraction force) N of the sheet is obtained.

 That is, the object force (attraction force) N of this sheet is N = ∫sfxds.

Thus, assuming that the friction coefficient of the paper is μ, the transport force F of the paper is expressed by the following equation: F = μN

As a specific configuration of this embodiment, a 75 μm-thick PET film (dielectric 8a) is
An endless belt on which a 10 μm-thick aluminum vapor-deposited layer (the conductive layer 8b) was formed was used, and the pitch of the charge pattern formed thereon was 2.4 mm.

That is, the reading speed of the book original 92 is 120 mm / s,
The AC frequency was 50 Hz, and the applied voltage was ± 2 kV _PP .

Moreover, the experimental value of the pitch characteristics of the conveying force when the constant applied voltage ± 2 kV _PP in FIG. 25, the pitch characteristics of the attraction force when the constant applied voltage ± 2 kV _PP in FIG. 26 The experimental values are shown in Fig. 27, and the experimental values of the applied voltage characteristics of the transfer force when the pitch of the charge pattern is constant at 2.4 mm are shown in Fig. 28. The experimental values of the applied voltage characteristics of force are shown.

As is clear from these experimental values, the pitch of the charge pattern used in the present embodiment, and the applied voltage are not limited to the above-described values.For example, the pitch of the charge pattern is 0.5 mm. The applied voltage may be within a range of up to 10 mm, and the applied voltage may be ± 1 kV _PP or more.

Further, in the present embodiment, the 2 kHz frequency and the applied voltage of ± 2 kV _PP are used as the high-frequency AC voltage for static elimination, but each of these values is a value at which the static elimination effect is obtained. Any value may be used.

As described above, according to the page turning method in the present embodiment, it is not necessary to perform any work on the paper (book original 92) to be attracted to the turning conveyance belt 8, so that the papers attract each other due to static electricity. Therefore, it is possible to eliminate the occurrence of a page turning error of the book document 92 due to the occurrence of disorder (irregularity) at the sheet edge.

In addition, according to this page turning method, since the place where the attraction force is generated is near the surface of the turning and conveying belt 8, the paper in contact with the surface of the turning and conveying belt 8, that is, the book The page 92 of the original 92 is executed. For the uppermost original, a sufficiently large conveying force and a suction machine operate, but the second and lower originals located below this original , The conveying force and the suction force hardly act.

Therefore, according to this page turning method, only one page can be turned reliably, and this method is the most suitable method as the page turning method for the book document 92.

Next, the operation of the MFDS configured as described above will be described.

29 is an MFDS electrical block diagram, FIG. 30 is an operation mode transition diagram when reading a book original, FIG. 31 is a transition diagram when reading a sheet original, and FIG. 32 is a flowchart showing the MFDS operation mode. is there.

First, the control means of the MFDS will be described with reference to FIG.

In FIG. 29, the main control board 310 controls commands and data between each board, and turns on / off each load.
The entire MFDS is controlled by performing timing, abnormal processing by sensor input, and mode switching.

Further, the main control board 310 is configured to set a communication protocol by performing communication with a connected device, and to be able to individually cope with each connected device.

For example, when the printer 300 is connected as the output device, its pixel density, processing speed, availability of double-sided printing, availability of backside discharge, and the like are checked, and the corresponding mode selection area can be determined. Is configured.

Further, the main control board 310 has two interfaces to external devices corresponding to each mode.

In the main control board 310 of this embodiment, commands between the boards are performed by serial communication, separated from the data and control lines, and commands can be transmitted and received even during the data output.

Here, in order to enhance the versatility, by setting one or both of GPIB, Centronics, SCSI, etc. as the interface, the display display via a general-purpose printer or a personal computer can be performed. , Optical disk device, HDD, and FDD
Can be stored without using a special interface.

On the other hand, in FIG. 29, the turnover conveyance belt drive control board 311 controls the turnover conveyance belt drive motor 61.

Further, the turning unit drive control board 312 controls the turning unit drive motor 60.

Here, the turn-over transport belt drive motor 61 detects the speed of the turn-over transport belt 8 by feedback of an encoder pulse generated by an encoder integrally attached to the turnover transport belt drive motor 61, and controls the speed position and corrects the speed. Reverse rotation operation is being performed.

On the other hand, the turning unit drive motor 60 detects the position of the turning roller 2 by feedback of the encoder pulse generated by the encoder 152 attached to the turning roller 2, and performs the speed position control and the forward / reverse operation. .

In addition, these turnover belt drive control board 31
1 and the turn-over unit drive control board 312 are connected to the main control board 310, respectively, and transmit and receive commands to and from the main control board 310 by serial communication.

The operation display board 313 includes a keypad for setting the number of prints, a scaling ratio, the number of pages to be turned, and each mode, a display for these key inputs, an error display, a turning state display, and a display for each mode. A display such as a document setting method is displayed.

Here, in the mode display, the connected device (printer
Only the mode that is possible due to the capability of 300) is displayed, or an error is displayed when an impossible mode is selected.

For example, if a printer that cannot print on both sides is connected and the key input of the duplex mode selection key 612 is made, “the connected printer cannot print on both sides.”
Is displayed.

Reading of a document is started by key input of the start key 600 in the operation display mode 313.

Further, the operation display board 313 and the main control board 310 are connected to each other by a command through serial communication, or
Sending and receiving data.

The first image processing board 314 has a function of generating a drive clock for a Si equal-size sensor 315 (hereinafter referred to as a first CCD 315) built in the first reading sensor unit 9 and a function of generating a drive clock for the first reading sensor unit 9. The function to take ON / OFF timing of the built-in first LED 316 and the first CC
It has the function of amplifying the output of D315 and A / D converting this output to perform image processing.

Further, in the first image processing board 314, image processing such as shading correction, MTF correction, main scanning scaling, character processing, photographic processing, and negative / positive inversion are performed.

The first image processing mode 314 corresponds to the main control board 310
, And transmits and receives data and commands to and from the main control board 310.

The second image processing board 317 is, like the first image processing board 314 described above, a second reading sensor unit 14 (first
A function for generating a drive clock for the second CCD 318 built in the reading sensor unit 9) and a function for setting ON / OFF timing of the second LED 319 also built in the second reading sensor unit 14. And the function of amplifying the output of the second CCD 318 and A / D converting the output to perform image processing.

Further, in the second image processing board 317, similarly to the first image processing board 314, shading correction, MTF correction,
Image processing such as main scanning magnification, character processing, photographic processing, and negative / positive reversal are performed.

Further, the second image processing board 317 is connected to the main control board 310, and the main control board 310
Data and commands are transmitted and received between and.

As described above, the first high-voltage power supply 320 is a power supply that applies a high-voltage AC voltage to the first bias roller 3, and is configured to generate two kinds of frequencies, for adsorbing a document and for removing a belt. The switching of each frequency is performed by switching signals from two output ports of the main control board 310.

Similarly to the first high-voltage power supply 320, the second high-voltage power supply 321 is a power supply for applying a high-voltage AC voltage to the second bias roller 11, and generates two kinds of frequencies for original suction and belt static elimination. The switching of each frequency is performed by a switching signal from two output ports of the main control board 310.

The paper feed clutch 128 controls the timing to start feeding the sheet document 200 based on a control signal from the main control board 310.

Also, various sensors 25, 26, 27, 28, 29, 30, 31, 32, 33, 34 connected to the respective input ports of the main control board 310.
Performs mode switching, timing detection, and abnormality detection as described in the description of the mechanism,
The respective detection signals are given to the main control board 310.

 Next, the operation mode of the MFDS will be described.

The operation mode of the MFDS is roughly divided into two modes.

The first operation mode of the MFDS is a book original reading mode for performing an automatic page turning reading operation of a book original as shown in FIG. 30, and the second operation mode is as shown in FIG. This is a sheet document reading mode for performing an automatic sheet feeding reading operation of a sheet document.

The book document reading mode and the sheet document reading mode each have further subdivided modes.

That is, as shown in FIG. 30, the book original reading mode includes an automatic book size recognition mode for automatically recognizing the book size of the book original 92, and an operation display board.
There is a book size key input mode in which a book size is designated by key input of 313.

In each of the automatic book size recognition mode and the book size key input mode, an automatic page turning reading operation for the book document 92 is performed by the spread reading mode in which the book document 92 is set with the document surface facing upward. Is performed.

Further, in the book document reading mode, as a reading method, document images of two pages on the left and right sides of the opened book document 92 are continuously read in connection with an output device (particularly, a printer), and the two pages are read. Using a two-page spread continuous reading mode in which an image is printed on one transfer sheet and a printer having a double-sided image forming function, two right and left pages of the original image were printed in the two-page continuous reading mode described above. A two-sided continuous double-page reading mode and a two-sided open book original 92 are formed on the back side of one transfer sheet. And a two-page spread reading mode in which the document image of both the left and right pages is read one page at a time. On the back side of the transfer sheet printed in the section reading mode, the printer image having the two-sided image forming function is used to form the original image of both the left and right pages next to the opened book original 92, one page at a time. It has a double-sided mode of a two-page spread reading mode.

On the other hand, in the sheet original reading mode, as shown in FIG. 31, with the position of the first reading sensor unit 9 or the second reading sensor unit 14 fixed,
A sheet original through mode in which an original image is read by a sheet through method while automatically feeding and discharging the sheet original 200, and a sheet original 200 on the original placing surface 116.
A sheet original scanning mode in which the first reading sensor unit 9 of the page turning reading unit 1 is repeatedly reciprocated (scanned) in a state in which is set (fixed) to read the sheet original 200, and an automatic original feeding function There is a sheet document manual opening / closing mode in which a document is manually set when a document cannot be set (or not set) with the (ADF).

In the sheet original through mode, the sheet original 200
And a two-sided reading mode in which the first reading sensor unit 9 and the second reading sensor unit 14 simultaneously read images on both sides of the sheet document 200.

Further, in the both-side reading mode, the first reading sensor unit 9 and the second reading sensor unit 14
The first reading sensor unit 9 and the second reading sensor unit 14 are arranged at the same position facing each other to read a document image,
A separate position reading mode in which the document images are read by being arranged at different positions shifted from each other.

The operation mode of the MFDS has been described above. Next, the switching of each mode described above will be described with reference to FIG.

In FIG. 32, when the main power of the MFDS is turned on,
As shown in the figure, the main control board 310, the turning transport belt drive control board 311, the turning unit drive control board 312,
The operation display board 313, the first image processing board 314, and the second image processing board 317 are respectively reset and initialized.

After that, the connection of the connected device such as the printer 300 is checked, and the mode compatible with the connected device is displayed.
The input of each key for setting the number of prints, the magnification, the number of pages turned, and each mode is received.

During this time, book original 92 or sheet original 200
Is set.

Here, when the sheet document 200 is set on the sheet document tray 94, the sheet document sensor 25 is turned ON.

Also, here, the open key 620 of the operation display board 313
The MFDS transport unit 19 is opened by the
When the book document 92 is set in the central reference positioning section 24 in a state of being spread, the book document sensor 27 is
ON.

These sheet original sensor 25 and book original sensor 27
ON / OFF status and numeric keypad 602 on operation display board 313
Depending on the number of prints indicating the number of prints of the sheet document 200 input by
It switches as shown in FIG.

That is, if the book document sensor 27 is OFF, the sheet document sensor 25 is ON, and the number of prints is “1”, the mode transits to the sheet document through mode.

If the book document sensor 27 is OFF, the sheet document sensor 25 is ON, and the number of prints is “2” or more, the mode is changed to the sheet document scan mode.

Further, when the book document sensor 27 and the sheet document sensor 25 are both OFF, the mode transits to the sheet document manual opening / closing mode.

When the book original sensor 27 is ON, the sheet original sensor
If 25 is OFF, the mode transits to the book document reading mode.

Further, when the book original sensor 27 and the sheet original sensor 25 are both ON, the abnormality processing 1 (warning buzzer ON and error display) is performed to call the user's attention. Then, the mode transits to the book document reading mode.

After entering the mode subroutine thus selected, the start key 600 of the operation display mode 313 is set.
If is not pressed, the process returns to the step of receiving a key input without executing the image reading operation.

Next, the operation of each mode described above will be described.

First, the book document reading mode will be described with reference to FIG.

When the MFDS mode enters the book original reading mode, ON / OFF of the scan cutoff sensor 34 is checked.

As shown in FIG. 4, the scan cutoff sensor 34 detects the upper limit detecting unit 76 and turns on when the page turning reading unit 1 has moved up to the upper limit position.

As described above, the page turning reading unit 1 is moved up and down in accordance with the thickness of the book document 92 placed on the document placing surface 116.

Ascending of the page turning reading unit 1, that is,
As the thickness of the book document 92 increases, the tension of the turn-over transport belt 8 for driving the book document 92 increases.

Therefore, if the tension of the turn-over transport belt 8 is too high, that is, if the book original 92 is too thick and the page-turning reading unit 1 rises too much, this tension acts as a brake and the scanning of the page-turning reading unit 1 is performed. Can not be done.

The scan cutoff sensor 34 detects such a level that the page turning reading unit 1 cannot scan because the book document 92 is too thick.

If the scan cut-off sensor 34 is ON, the user performs forcible processing 2 (warning buzzer ON and an error message of "book document is too thick"),
The transport unit 19 is closed so that the transport unit 19 is not damaged.

Here, when the thickness of the book document 92 is equal to or less than the adaptive level, the transport unit lock sensor 31 is turned on by closing the transport unit 19 by the user.

At this time, if the transport unit 19 remains open, that is, if the transport unit lock sensor 31 remains OFF, abnormality processing 3 (ON of the warning buzzer and display of "Please close the transport unit") is performed. .

When the transport unit 19 is closed, ON / OFF of the book size upper limit sensor 33 is checked.

Here, the book size upper limit sensor 33 detects that the book original 92
When the book size of the book document 92 set on the document placing surface 116 is larger than the reading area of the page turning reading unit 1 and is not readable, In the case of, abnormal processing 4 (warning buzzer ON and display of "book document size is too large") is performed.

After that, after checking whether or not there is a key input of the number of prints, the magnification, and the number of pages to be turned, the pre-scan flag is set in the automatic book size recognition mode, and in the case of not in the automatic book size recognition mode. Then, a book size input mode is set, and a predetermined key input is performed on the operation display board 313 to set the book size, whereby the reading area of the book document 92 is determined.

Then, when the start key 600 is pressed, the transport unit lock device 140 operates, and the transport unit 19 is locked to the document table 18.

This prevents a situation in which the user mistakenly opens the transport unit 19 during the page turning operation by the page turning reading unit 1 and the book document 92 is damaged.

Next, after the operation of the transport unit locking device 140, if the above-described pre-scan flag is set, the pre-scan operation of the page turning reading unit 1 is performed.

Here, if the prescan flag is not set, this prescan operation is skipped.

After this prescan operation, the connected device (printer 30
It waits until the preparation of 0) is completed.

When a read start signal output from the connected device (printer 300) is received at the stage when the connected device (printer 300) is ready, the page turning reading unit 1 is driven, and the book The reading operation of the document image of the document 92 is started.

The reading operation by the page turning reading unit 1 is repeatedly performed by the number of times corresponding to the number of prints set before.

When the predetermined number of reading operations is completed,
As described above, the page turning reading unit 1 performs the page turning operation to perform the reading operation of the document image of the next page.

In this manner, the reading operation of the document image of the book document 92 and the page turning operation are repeatedly performed according to the preset number until the last page is turned.

Then, when the page turning operation of the preset final turning page is completed and a predetermined number of reading operations for the final reading page are completed, the page turning reading unit 1 is performed without performing the page turning operation of the final reading page. Is returned to the home position 1-A, and the book document reading mode routine is returned.

The basic operation of the book original reading mode is
As shown in the flow chart shown in the figure, the two-page spread continuous reading mode, the two-sided mode, the two-page spread reading mode, and the two-sided mode described above in this mode are the same as those shown in FIG. It becomes the input mode accepted at the time of setting.

For each of these input modes, start key 600
A description will be given with reference to a timing chart showing the progress since the button was pressed.

First, using the timing chart shown in FIG. 34,
The two-page spread continuous reading mode will be described.

In FIG. 34, start key 6 on operation display board 313
When 00 is pressed and the reading start switch SW is turned on, a shutter (not shown) in the first reading sensor unit 9 closes.

The inner surface of the shutter is a white reference plate, by which shading correction of the first reading sensor unit 9 is performed.

This shading correction is performed every time the page turning reading unit 1 rises, and is completed before the moving speed of the page turning reading unit 1 reaches a constant speed (a timing chart of this portion is not shown).

The start of the page turning reading unit 1 starts from the main control board 310 and the page turning unit driving control board 3
This is carried out by a forward rotation start signal sent to 12.

In response to the forward rotation start signal, the page turning reading unit 1 starts pre-scanning.

Here, after the moving speed of the page turning reading unit 1 has risen to the constant speed Vf, the shutter has already been opened, and the reading of the original image of the book original 92 has been started by the first CCD 315.

By reading the page turning reading unit 1 at the time of pre-scanning, the edge of the opened book original 92 is detected by image processing as an edge, and the output of the encoder 152 attached to the turning roller 2 at this time is counted. By recognizing the book size of the book document 92 set on the document placing surface 116, the reading area of the document image of the page turning reading unit 1 and the page turning area are determined.

In this way, this MFDS is based on the
Since it is configured to be set with reference to the center of 116, by detecting only the left end portion of the set book document 92, the reading area of the document image of the page turning reading unit 1 and the page The turning region can be calculated.

Therefore, in the MFDS, when the book size of the book document 92 is detected, it is not necessary to perform the full-page pre-scanning of the page-turning reading unit 1, and only the short pre-scanning of the page-turning reading unit 1 is performed.
The book size of the book manuscript 92 placed on 6 can be detected.

This prevents the page starting reading of the book original 92 from being erroneously turned during the pre-scanning of the page turning reading unit 1.

The book size data of the book document 92 is transmitted from the main control board 310 to a printer as an externally connected device.

On the other hand, while the book size detection is completed and the book size data is transmitted to the printer 300, the main unit control board 310 sends the turning unit drive control board 3
A reversal signal for reversing the turning unit drive motor 60 is given to the page 12, and the page turning reading unit 1 is returned to the home position 1-A at the speed Vr.

Note that the document mounting surface 116 of the document table 18 of the MFDS is colored with a chromatic color, such as yellow, which is rarely used as a book document. Since the area identification accuracy between the placing surface 116 and the reading area of the document image of the book document 92 can be improved, the book size detection at the time of the pre-scan can be performed more accurately, and the book size data Reliability is improved.

Here, if the document placing surface 116 is colored with an intermediate color such as gray, for example, the first CCD 315 of the first reading sensor unit 9 can be used without using a color sensor.
Region identification at the time of pre-scan becomes possible.

After the above-described pre-scan is completed and the page turning reading unit 1 retreats to the home position 1-A,
When the printer 300 is ready and a transfer request signal for requesting data transfer is given from the printer 300 to the main control board 310, the main control board 31
From 0, a normal rotation signal for normal rotation of the turning unit drive motor 60 is given to the turning unit drive control board 312, and the normal operation of the page turning reading unit 1 is started.

As described above, the output of the encoder 152 of the page turning roller 2 is fed back to the page turning reading unit 1 so that the page turning reading unit 1 is controlled at a constant speed of Vf along the original surface of the book original 92. It is moved toward the end position position 1-C.

At this time, the LED 316 of the first reading sensor unit 9
Is already lit, and reading of the document information of the book document 92 has been started by the first CCD 315 of the first reading sensor unit 9.

Here, as shown in FIG. 1, the vicinity of the binding portion (center portion) of the book document 92 set to be spread and set on the document placing surface 116 is close to the binding portion because the surface of the document is tightly warped. It becomes difficult to read the document information accurately.

Normally, document information such as characters and images is not formed near the binding portion of the book document 92.

Therefore, in this MFDS, as shown in FIG. 34, near the binding portion of the book document 92, the reading SFGATE of the first CCD 315 is turned off, and reading of document information near the binding portion is masked. I have.

As described above, the mask area at the time of the initial setting of the document information is +
10 mm, it is set to be −10 mm, this mask area, by the key input of the book binding part mask area setting key 608 of the operation display board 313, the setting value can be changed, It can also handle book manuscripts with special bindings.

The reading of the document information of the book document 92 by the first reading sensor unit 9 is performed until the page turning reading unit 1 reaches the end position 1-C. , The first high-voltage power supply 320 is turned on at the frequency f1.

As a result, the above-described charge pattern is formed in a portion of the turning transport belt 8 which is in contact with the right page of the book document 92.

As described above, the turning transport belt 8 is not driven when the page turning reading unit 1 is driven, and functions to hold the book original 92.

In this way, when the page turning reading unit 1 is driven to its end position 1-C and reading of the document information up to the reading area at the right end of the book document 92 is completed, the output of the first high-voltage power supply 320 Is turned off, a turning signal is given from the main control board 310 to the turning unit drive control board 312, and the page turning operation of the book original 92 by the page turning reading unit 1 is started.

At this time, when the document surface read by the first reading sensor unit 9 corresponds to the last read page of the book document 92 set in advance, the turning signal is not output from the main control board 310, and After finishing reading the last read page of the book document 92, the page turning reading unit 1 is returned and moved without performing the above-described page turning operation, and moves to its home position 1
Saved to -A.

During the page turning operation of the book original 92, the reverse operation of the page turning reading unit 1 is slow-started until the page turning sensor 29 is turned on, and the book electrostatically attracted onto the turning transport belt 8 is turned on. The read end page of the document 92 (the right page in FIG. 1) is guided into the page storage unit 7.

Then, the page turning reading unit 1 is further returned and moved toward the home position position 1-A,
The book document 92 is turned into the page storage section 7 up to the center of the read end page.

Further, during the page turning operation of the page turning reading unit 1, the first high-voltage power supply 320 is used in order to eliminate the charge pattern in the original adsorbing area of the page feeding belt 8.
Is turned on at the frequency f2.

In this manner, the read end page of the book document 92 flipped into the page storage section 7 of the page flip reading unit 1 is moved to the end after the page flip reading unit 1 has passed the center of the book document 92. During the position position 1-C, the sheet is ejected from the page storage section 7 and the page turning operation is completed.

The return speed Vrm of the page turning reading unit 1 at the time of discharging the page is set to be higher than the speed Vf at the time of reading the document, that is, Vrm> Vf. Is being planned.

The state of the series of page turning operations is detected by the page turning sensor 29.

That is, this MFDS is a page turning reading unit 1
The presence / absence of an abnormality is detected by checking ON / OFF of the page turning sensor 29 at each of the above positions, and when there is an abnormality, an abnormality processing operation is executed.

As this abnormal processing operation, a warning buzzer is activated, and, for example, when the original page cannot be turned into the page storage section 7, “page cannot be turned”, the original page turned into the page storage section 7 is displayed. If the page cannot be ejected, a message such as "Page cannot be overlapped" is displayed on the operation display board
313 is displayed, and the page turning operation is stopped.

In addition, in order to allow the user to confirm the page turning state in which the abnormality has occurred, the location where the page turning state has occurred is displayed on the operation display board 313.

Hereinafter, the reading of the document image of the second page and subsequent pages of the book document 92 and the page turning operation are sequentially started by a transfer request signal from the printer 300, and the same reading operation and page turning operation as described above are performed. The processing is repeatedly executed until reaching a preset final read page.

Here, in the timing chart of FIG. 34, when the number of prints of the original is “1”,
When each of the 92 read pages is read once,
The case where the turning operation of the page after the reading is performed is described, but the number of prints of this document is “2”.
In the case of the above setting, when the first document reading operation by the first reading sensor unit 9 is completed, the main control board 310 sends a turn signal to the turn unit drive control board 312 instead of the turn signal. A reverse signal is transmitted, and the page-turning reading unit 1 is returned toward the home position 1-A at the speed Vr. At the same time as the return operation is completed, the second time of the page-turning reading unit 1 is performed. Is started.

Then, such a document reading operation of the page turning reading unit 1 is repeatedly executed by the preset number of prints of the original, and when the number of operations matches the number of prints, the first operation is performed. Then, a turning signal is transmitted from the main control board 310 to the turning unit drive control board 312, and the above-described page turning operation is executed.

Hereinafter, the reading of the document images of the second and subsequent pages of the book document 92 and the page turning operation are sequentially started by a transfer request signal from the printer 300, and the same number of reading operations as the number of prints described above are performed. ,as well as,
The page turning operation is repeatedly executed until a preset final read page is reached.

Here, if the read original image is set to be enlarged by the print magnification key 614, the scan speed Vf of the first reading sensor unit 9 is set.
Is changed to a speed corresponding to the scaling factor, so that the original image is scaled in the sub-scanning direction and the first image processing board 314 is scaled in the main scanning direction. Is made.

On the other hand, in the double-sided mode of the two-page spread continuous reading mode as described above, the transmission timing of the transfer request signal from the printer 300 to the main control board 310 is set because the printer 300 performs the double-sided printing of the original image. Although the operation is slightly delayed, other operations are the same as those in the two-page spread continuous reading mode described above.

Next, the two-page spread reading mode will be described with reference to FIG.

The two-page spread reading mode is a mode in which the left page and the right page of the spread book document 92 are read separately and an image is formed, and a mode in which each of these images is printed on separate transfer paper. There is a mode for printing on the front and back of one transfer sheet (two-sided mode of this two-page spread reading mode).

In this mode, one of the operation of reading from the left page and the operation of reading from the right page of the book document 92 is selected and set by key input of the reading start page selection key 603 of the operation display board 313. can do.

FIG. 35 shows a timing chart when reading is started from the left page facing the book document 92.

The operation of this two-page spread reading mode is as follows.
The operation in the two-sided mode in the two-page continuous reading mode is substantially the same as the operation in the two-sided mode in the two-page continuous reading mode. The difference between the two-sided operation in the two-page continuous reading mode is that the transfer request signal from the printer 300 to the main control board 310 is different. , Which is sent on a page-by-page basis,
The page turning reading unit 1 is moved (scanned) at a constant speed from the left page to the right page of the book document 92.

FIG. 36 shows a timing chart in the case where reading is set so as to start from the right page of the book original 92 in the two-page spread reading mode.

As is clear from this timing chart, when reading is started from the right page of the book original 92,
The document is programmed so that the moving speed of the page turning reading unit 1 for the left page where the book document 92 is not read is faster than the scanning speed Vf of the first reading sensor unit 9 for the right page. The reading time is shortened, that is, the performance of the reading function is improved.

Also, in the case of the two-page spread reading mode, if a page to be skipped without scanning (skip) is set by the read skip page setting key 618, the page turning reading unit 1 for the read skip page is set. Is the scanning speed Vf of the first reading sensor unit 9 when reading.
It is programmed to move at a higher speed and immediately execute the turning operation of the read skip page (a timing chart is not shown).

By the way, generally, as shown in FIGS. 35 and 36, the printer 300
Few printers can continuously request a transfer request signal in a normal state.

Therefore, when using such a general printer to perform the double-page spread reading mode, the printer side feeds two transfer papers so as to overlap one another. Can be done.

Here, in the case where a certain distance must be provided between these two transfer papers due to the resist between the transfer paper and the photosensitive drum, the left page of the book document 92 is required. Image data on the right side of the book original 92,
This can be realized by delaying the transfer timing to the printer by a time corresponding to the distance between the transfer papers through the delay memory.

FIG. 37 is a block diagram showing an example of the latter case, and FIG. 38 is a timing chart thereof.

In this example, the image data output to the printer through the delay memory is delayed by the time Td with respect to the image data output directly to the printer through the switch due to the internal gates A and B on the main control board 310. It is configured to be.

Next, the double-sided mode in the two-page spread reading mode will be described.

First, a description will be given of a case in which image data of two pages on the left and right sides of a spread book original 92 is printed on the front and back of one transfer sheet.

In this case, since the transfer paper needs to be reversed and conveyed on the printer 300 side, it takes some time from the end of printing the image data of the left page to the start of printing the image data of the right page. Hangs.

Therefore, in this mode, the drive of the page turning reading unit 1 is temporarily stopped when the page turning reading unit 1 has finished reading the left page of the book document 92 and has reached the vicinity of the binding portion.

Then, the printing of the left page image on the printer 300 side and the reverse conveyance of the transfer sheet are completed, and the printer 30
When a transfer request signal is issued from 0 to the main control board 310, the stopped page turning reading unit 1 is driven again at a predetermined scanning speed Vf to read the right page of the book document 92, and the right page is read. The image data of the page is transferred to the printer 300, and the right page image is printed on the back surface of the transfer paper having the left page image printed on the front surface, and double-sided printing is performed.

 FIG. 39 shows a timing chart at this time.

Next, a description will be given of a double-sided mode in which an image is formed by matching the relationship between the front and back sides of a printed transfer sheet and the front and back sides of the document surface of the book document 92 in this one-page spread reading mode.

In this mode, when starting reading from the left page of the book original 92, as described above, the printer
Instruct 300 to feed two sheets continuously, and transfer the transfer paper with the left page image printed out as it is, while reversing and transporting the transfer paper with the right page image printed on the back side. First, preparations are made to print the left page image of the next page of the book document 92.

During this time, the MFDS performs a page turning operation of the read original page.

When the page turning operation on the MFDS side is completed, the reading operation for the next page is executed, and the read left page image is placed on the back side of the transfer paper on which the right page image has been printed and conveyed in reverse. Printed and ejected.

The right page image read at this time is printed on a newly fed transfer sheet.

This transfer sheet is reversely conveyed in the same manner as the previous transfer sheet, and preparation is made for printing the left page image of the next page of the book document 92 on the back surface.

By repeating such a series of operations, a transfer sheet on which a document image having the same page configuration as the book document 92 is printed is obtained.

The above is an example of the operation in the book document reading mode.

Here, setting of a book original in the double-sided reading mode will be described.

In the connection device check in FIG. 29, if the printer 300 can discharge the back side, the following display is performed.

In other words, "If the book original is horizontal writing (left open), open the top page you want to read and set it up front.""If your book original is vertical writing (right open), open the top page you want to read. "Please set it upside down."

On the other hand, in the connection device check in FIG. 29, if the printer 300 can only discharge the front side, the following display is performed.

In other words, "If the book original is horizontal writing (left open), open the last page you want to read and set it upside down.""If your book original is vertical writing (right open), open the last page you want to read. Please set each method for horizontal writing and vertical writing of the book original.

In the MFDS, by setting the book original 92 in accordance with the above-described instruction, the pages of the transfer paper to be discharged can be aligned regardless of the function of the printer 300 connected thereto.

There are two methods of inputting the number of pages to be turned in the MFDS, using two types of key input on the operation display board 313. One of these input methods is
Users can choose according to their preferences.

One of the input methods is to use the read total page setting key 60
6 is a method of setting the total number of pages to be read, and another input method is to use the reading start page setting key 604, the reading last page setting key 605, etc.
This is a method of inputting the first page to be read and the last page.

Regardless of which method is used to input the number of page turns in the MFDS, it is sufficient that the number of page turns of the page turning reading unit 1 can be accurately calculated.

Hereinafter, a method of calculating the number of page turning times in each of the above methods will be described.

First, the case where the total number of pages to be read is input will be described.

Here, assuming that the total number of pages to be read is X and the number of turns is M, when reading from the left page, (X−2) / 2 = M + Remainder. X-1) / 2 = M + Remainder..., And the number of turns is obtained by calculating the value of M from these equations.

Next, a case where the first page to be read and the last page are input will be described.

Here, assuming that the first page to be read is Y, the last page is Z, and the total number of pages to be read is X, X = Z−Y + 1..., And this formula is substituted into the above formula and formula. Thus, the number of turns M can be calculated.

By the way, as described above, the MFDS is configured so that a single device can selectively read a book document and a sheet document and form an image thereof.

The image reading mode for the book document is as described above, and the image reading mode for the sheet document in the MFDS will be described below.

As shown in FIG. 31, the sheet original reading mode includes a sheet original through mode, a sheet original scanning mode, and a sheet original manual opening / closing mode.

 First, the sheet document through mode will be described.

The sheet document through mode includes a one-sided document reading mode and a two-sided document reading mode. The two-sided document reading mode includes a same-position reading mode and a different-position reading mode.

The selection of these modes is performed as shown in FIG.

First, in the one-sided original reading mode, FIG. 41, and
As shown in FIG. 42, the sheet document 200 is set downward on the sheet document tray 94, and in this state, when the start key 600 is pressed, first, the power of the turn-over conveyance belt drive motor 61 is turned on, and the drive is started. The rollers 12 are rotated, and the turn-over transport belt 8 is rotated.

At this time, if there is no abnormality in each sensor and each input data, the paper feed clutch 128 is turned on and the first belt support roller 9 is turned on.
Feeding drive belt from the second feeding pulley 130 attached to 7
The paper feed roller 96 is rotated via 127 and the sheet original 200
Is transported toward the paper feed separation pad 95.

The sheet separation pad 95 separates only the lowermost sheet document 200 from other sheet documents, and is guided by the first conveyance guide 108 and the second conveyance guide 109,
The sheet is conveyed to a position in contact with the turning conveyance belt 8.

Here, the second conveyance guide 109 includes a paper feed sensor 26
After the rear end of the sheet document 200 is detected by the paper feed sensor 26, the paper feed clutch 128
Is turned off, the conveyance timing of the sheet document 200 is set.

On the other hand, during this time, an AC high voltage is applied from the AC power supply 35 to the second bias roller 11 with the rotation of the turn-over conveyance belt 8, so that a striped charge pattern is formed on the turn-over conveyance belt 8.

As a result, the fed sheet document 200 is sucked and conveyed by the turning conveyance belt 8.

At this time, the linear speed of the turning transport belt 8 is
It changes to 360mm / s according to the set magnification when zooming.

On the other hand, in this mode, the page turning reading unit 1
Is located at the end position position 1-C,
The first reading sensor unit 9 sequentially reads the document information of the sheet document 200 conveyed by the turning conveyance belt 8 (pixel density is 400 dpi).

Then, the sheet document 200 that has been read is read by the third conveyance guide 110 and the fourth opposing roller 103, the fifth opposing roller 104, the sixth opposing roller 105, and the seventh opposing roller 106.
The sheet is nipped and conveyed, and is discharged onto the discharge tray 23 from the discharge port 117.

A paper discharge sensor 28 is attached to the third conveyance guide 110 near the paper discharge port 117, and the paper discharge jam of the discharged sheet original 200 is detected.

When the reading operation of the first sheet document 200 is completed, next, at a predetermined sheet feeding timing, the sheet feeding clutch 128 is turned on again, and the second sheet document 200 is fed, The same reading operation as described above is performed.

In this way, the sheet originals 200 set in the sheet original tray 94 are sequentially fed and read, and the last (uppermost) sheet original 200 is fed and the sheet original sensor 25 is turned off. 2 The power supply of the bias roller 11 is switched to a high-frequency AC voltage, and the charge pattern of the turn-over conveyance belt 8 is removed.
After the is discharged, all the operations of the MFDS are stopped.

The reading operation described above is an operation when a printer having a backside discharge function is connected to the MFDS, thereby realizing page alignment and discharge of the sheet document 200 and the printed transfer sheet.

Here, if the printer connected to the MFDS has only the front-side discharge function, the sheet document tray 94
The sheet original 200 is set upward, and the sheet original 200 is read by the second reading sensor unit 14, whereby the sheet original 200 is read in the same manner as in the case of the above-described printer having the backside discharge function. In addition, page transfer of printed transfer paper is realized.

The other operations when the printer having the front surface discharge function is connected are the same as those when the printer having the back surface discharge function is connected.

Next, the duplex document reading mode in the sheet document through mode will be described.

In the double-sided document reading mode, a horizontally written sheet document is set on the sheet document tray 94 with the leading edge of the document facing downward.

This is because the first reading sensor unit 9 and the second reading sensor unit 14 do not have a memory,
This is because only mirror inversion in the main scanning direction can be used.

First, the basic operation of the same-position reading mode in the double-sided document reading mode is the same as that in the single-sided document reading mode as shown in FIGS. 43 and 44. Unit 1
Is positioned at the home position 1-A, and at the same position as the position of the second reading sensor unit 14 on the document table 18, the reading of the document information on both the front and back sides of the sheet document 200 is performed by these first positions. The reading is performed by the reading sensor unit 9 and the second reading sensor unit 14 simultaneously and in parallel.

On the other hand, the basic operation of the separate position reading mode in the double-sided original reading mode is the same as that of the single-sided original reading mode as shown in FIGS. 45 and 46. Unit 1 is
It is located at the end position 1-C.

As is clear here, in this separate position reading mode, the interval between the reading positions of the first reading sensor unit 9 and the second reading sensor unit 14 is larger than the length of the maximum size document. First reading sensor unit 9 and second reading sensor unit
Document information on both the front and back sides of the sheet document 200 read by 14 is output in chronological order.

Next, the sheet scan mode in the sheet original reading mode will be described.

In this sheet scan mode, FIGS. 47 and 48
As shown in FIG.
0 is set upward, and in this state, the start key 600
Is pressed, first, the power supply of the turning and conveying belt driving motor 61 is turned on, the driving roller 12 is rotated, and the turning and conveying belt 8 is rotated.

At this time, if there is no abnormality in each sensor and each input data, the paper feed clutch 128 is turned on and the first belt support roller 9 is turned on.
Feeding drive belt from the second feeding pulley 130 attached to 7
The paper feed roller 96 is rotated via 127 and the sheet original 200
Is transported toward the paper feed separation pad 95.

The sheet separation pad 95 separates only the lowermost sheet document 200 from other sheet documents, and is guided by the first conveyance guide 108 and the second conveyance guide 109,
The sheet is conveyed to a position in contact with the turning conveyance belt 8.

Here, the second conveyance guide 109 includes a paper feed sensor 26
After the rear end of the sheet document 200 is detected by the paper feed sensor 26, the paper feed clutch 128
Is turned off, the conveyance timing of the sheet document 200 is set.

On the other hand, during this time, an AC high voltage is applied from the AC power supply 35 to the second bias roller 11 with the rotation of the turn-over conveyance belt 8, so that a striped charge pattern is formed on the turn-over conveyance belt 8.

As a result, the fed sheet document 200 is sucked and conveyed by the turning conveyance belt 8.

At this time, the linear speed of the turning conveyance belt 8 is 360 mm / s.
When the leading edge of the sheet document 200 reaches the home position 1-A, the turning of the turn-over conveyance belt 8 is stopped.

On the other hand, in this mode, the page turning reading unit 1
Is located at the home position 1-A,
After the rotation of the turning transport belt 8 is stopped, the first turning sensor unit 9 turns the page turning reading unit 1 while being moved toward the end position 1-C by the turning unit drive motor 60. Sheet document 20 conveyed by conveyance belt 8
0 document information is read sequentially (pixel density 400dp
i).

At the time of reading the document information, a high-frequency AC voltage is applied to the first bias roller 3 by the first high-voltage power supply 320, and the charge pattern formed on the turn-over transport belt 8 is eliminated.

This prevents the sheet document 200 from entering the page turning reading unit 1 when the page turning reading unit 1 is returned and moved.

The page turning reading unit 1 that has finished reading the sheet document 200 in this manner is returned toward its home position 1-A.

When the page-turning reading unit 1 returns, the first reading sensor unit 9 sets the sheet original 200
And the high-voltage AC voltage is applied to the first bias roller 3 from the first high-voltage power supply 320 to form a striped charge pattern on the turn-over conveyance belt 8. It is attracted to the turn-over transport belt 8 and fixed.

Then, after the above-described operation is repeated for the set number of times, the turning-over conveyance belt drive motor 61 is turned on,
The turn-over conveyance belt 8 is rotated, and the sheet document 200 that has been read is discharged onto the discharge tray 23 from the discharge port 117.

A paper discharge sensor 28 is attached to the third conveyance guide 110 near the paper discharge port 117, and the discharged sheet original is
200 paper jams have been detected.

When the reading operation of the first sheet document 200 is completed, next, at a predetermined sheet feeding timing, the sheet feeding clutch 128 is turned on again, and the second sheet document 200 is fed, The same reading operation as described above is performed.

In this manner, the sheet documents 200 set in the sheet document tray 94 are sequentially fed and read, and the last (topmost) sheet document 200 is fed, and the sheet document sensor 25 is turned off. 2 The power supply of the bias roller 11 is switched to the high-frequency AC voltage of the second high-voltage power supply 321, the charge pattern of the turn-over conveyance belt 8 is eliminated, and after the final sheet document 200 is discharged, all operations of the MFDS are performed. Is stopped.

Next, the sheet original manual opening / closing mode in the sheet original through mode will be described.

The operation of the sheet original manual opening / closing mode is, as shown in FIGS. 49 and 50, performed by turning off the sheet conveying means and the respective power supply for sheet suction in the operation of the above-described sheet original scanning mode. Then, the operator replaces the sheet document manually.

Hereinafter, the page turning reading unit 1 in this MFDS
The operation control will be described.

FIG. 51 shows an operation control circuit of the page turning reading unit 1 in the MFDS.

This operation control circuit controls the reciprocating drive of the page turning reading unit 1 and the speed thereof, and is incorporated in the turning unit drive control board 312.

In FIG. 51, a microcomputer 520 (hereinafter, referred to as a microcomputer 520)
The MFDS also performs mode control and sequence control (details are not shown).

As such a microcomputer 520, for example, μPD71054
Programmable interval timer 521 by G
Simply called a timer).

The timer 521 is to send a pulse width modulated PWM output for controlling the speed of the turning unit drive motor 60 (DC motor) under the control of the microcomputer 520.

The cycle of this PWM control is 50 (μsec).
Control with 0-bit resolution.

An 8 MHz oscillator 522 is connected to the timer 521 so that a clock signal is supplied.

The turning unit drive motor 60 is provided with a microcomputer 520.
Hand, is connected via the driving transistor Q ₁ to Q _4.

That is, when the transistors Q ₁ and Q ₄ are ON,
When Q ₂ and Q ₃ are OFF, a current that rotates clockwise (CW) is supplied to the turning unit drive motor 60, transistors Q ₂ and Q ₃ are ON, and transistors Q ₁ and Q ₄ are OFF. , The turning unit drive motor 60 has a counterclockwise (CC
W) is supplied with a rotating current.

Here, when the turning unit driving motor 60 rotates clockwise (CW), the page turning reading unit 1 moves forward, and when the turning unit driving motor 60 rotates counterclockwise (CCW), the page turning reading unit turns. 1 is set to be reactivated.

The rotation direction of the turning unit drive motor 60 is controlled by the CW signal and the CCW signal output from the ports PF6 and PF7 of the microcomputer 520, respectively.

An encoder 152 for generating a pulse according to the rotation of the turning roller 2 is directly connected to the turning roller 2.

Here, the encoder 152 generates two pulse signals having different phases according to the amount of rotation of the turning unit drive motor 60 and the direction of rotation.

One is an A-phase encoder pulse ENCA, and the other is a B-phase encoder pulse ENCB.

The A-phase encoder pulse ENCA is divided by the frequency division multiplexer 52
The signal is input to the counter input terminal C1 of the microcomputer 520 via the line 4.

As a result, the microcomputer 520 sets the A-phase encoder pulse E
The pulse interval of the NCA is measured by a counter inside the microcomputer 520 (regulated by the oscillation frequency 10 MHz of the oscillator 525 of the microcomputer 520).

The input signal to the counter input terminal C1 is an interrupt input. During the processing of the interrupt program, the value of the measurement data of the pulse interval of the A-phase encoder pulse ENCA is read, and the turnover is performed based on this data. The calculation of the number of rotations of the unit drive motor 60, the calculation of the motor control amount by the proportional / integral control calculation, and the output (data loading to the timer 521) are performed.

Specifically, the output of the A-phase encoder pulse ENCA is divided into 1, 2, 4, and 8 by the dividing multiplexer 524 according to the target speed, so that the interrupt input signal is given to the counter input terminal C1. .

Here, at the time of frequency division by one, the first reading sensor unit 9 is moved by 0.116 mm by one pulse of the encoder 152, and its speed is determined by the interrupt interval.
Calculated inside 520.

Then, based on the calculated speed data,
The output timer value is determined by the integration operation.

Further, the A-phase encoder pulse ENCA and the B-phase encoder pulse ENCB are input to the input terminal PC3 of the microcomputer 520 via the flip-flop 526 and are used for detecting a phase difference between the two, and are turned by the phase difference. The rotation direction of the unit drive motor 60 is determined.

That is, when the state of the B-phase encoder pulse ENCB at the time of the rise of the A-phase encoder pulse ENCA is input to the port of the microcomputer 520, the rotation direction of the turning unit drive motor 60 is determined.

Next, speed control of the turning unit drive motor 60 will be described.

The speed control of the turning unit drive motor 60 is performed by PWM control.

First, when the scanner scans the page turning the reading unit 1, i.e., during clockwise rotation of the turning unit drive motor 60, while turning ON the transistor Q _1, the PWM output from the timer 521, through a gate 527, transistor Turn Q ₄ ON / OFF and turn the unit drive motor 60
A potential difference is generated between the two terminals, and the turning unit drive motor 60 is rotated at a speed corresponding to the duty ratio of the PWM signal.

On the other hand, during page turning reading unit 1 returns, to the contrary to the above case, along with the turning ON of the transistor Q _3, the PWM output from the timer 521, the gate circuit 528
Through the rotation, the transistor Q ₂ is ON / OFF, a potential difference is generated between opposite between both terminals of the turning unit drive motor 60, the turning unit driving motor 60 at a speed corresponding to the duty ratio of the PWM signal Let it.

(Effects of the Invention) According to the present invention, when reading a book document that is difficult to align with a page edge, reading can be started from an appropriate position by setting the first document reading mode,
In addition, when it is easy to set the sheet document together with the page edges, the second document reading mode can be set, and the productivity can be improved.

[Brief description of the drawings]

1 is a schematic cross-sectional view of a multi-function document scanner (MFDS) embodying the present invention, FIG. 2 is a schematic cross-sectional view of a drive system of the MFDS, and FIG. 3 is a schematic view of a drive system of the MFDS. FIG. 4 is a plan view, FIG. 4 is a perspective view of an end of the page turning reading unit in the MFDS, FIG. 5 is a sectional view of a roller end showing a supporting structure of a roller constituting the page turning reading unit, and FIG. FIG. 7 is a side view showing an unlocking mode of the transport unit lock device in the MFDS, FIG. 7 is a side view showing a lock start operation mode of the transport unit lock device, and FIG. 8 is a lock completion mode of the transport unit lock device. FIG. 9 is a perspective view showing the appearance of the printer equipped with the MFDS, FIG. 10 is a perspective view showing the appearance of the printer equipped with the MFDS when the transport unit is opened, and FIG. Inside the flip reading unit Perspective view of the vicinity of the end of the first read sensor units disposed, FIG. 12 the first
13 is a side view of the vicinity of the end of the reading sensor unit, FIG. 13 is a partially enlarged sectional view showing a support structure of the end of the first reading sensor unit, and FIG. 14 is the back side of the turning roller 2 of the page turning reading unit. Fig. 15 shows the above MF
FIG. 16 is a cross-sectional view showing the structure of the center reference positioning portion of the document placing surface in DS, FIG. 16 is a plan view of the operation display board in the MFDS, FIG. 17 is a schematic cross-sectional view of the printer, and FIG. FIG. 19 is a plan view of the writing section, FIG. 19 is an operation view of a switching claw for switching the transfer paper transport path of the printer, and FIG.
Fig. 20 is a schematic cross-sectional view of the page turning reading unit.
FIG. 21 is a cross-sectional view showing a configuration of the first reading sensor unit, FIG. 22 is a schematic cross-sectional view showing an operation mode of the MFDS,
FIG. 23 is an explanatory diagram of the turning transport belt in the MFDS,
FIG. 24 is a partial perspective view showing the page turning operation of the turning transport belt, FIG. 25 is a diagram showing a pitch characteristic of the feeding force of the turning transport belt, and FIG. 26 is a pitch of the attraction force of the turning transport belt. FIG. 27 is a diagram showing characteristics, FIG. 27 is a diagram showing the applied voltage characteristics of the conveying force of the turn-over conveying belt, and FIG.
FIG. 29 is a diagram showing the applied voltage characteristic of the attraction force of the turning transport belt, FIG. 29 is an electrical block diagram of the MFDS, FIG. 30 is a mode transition diagram during the book document reading mode operation of the MFDS, and FIG. Is a mode transition diagram at the time of the sheet document reading mode operation of the MFDS, FIG. 32 is a flowchart showing the switching operation of each mode, FIG. 33 is a flowchart showing the operation of the book document reading mode, and FIG. 34 is a book document FIG. 35 is a timing chart showing the operation of the two-page spread continuous reading mode in the reading mode; FIG. 35 is a timing chart showing the operation of the two-page spread reading mode in the book document reading mode;
FIG. 36 is a timing chart showing an operation when the book is set so as to read from the right page of the book document in the two-page spread reading mode, and FIG. 37 is a transfer timing of data read in the two-page spread reading mode. FIG. 38 is a timing chart showing the operation of the circuit for delaying the transfer timing of the data read in the above-described one-page spread reading mode. FIG. 40 is a timing chart showing the operation of the double-sided mode, FIG. 40 is a flowchart showing the switching operation of the sheet original through mode in the sheet original reading mode, and FIG. 41 is a flowchart showing the operation of the single-sided reading mode in the sheet original through mode. FIG. 42 is a timing chart showing the operation in the single-sided reading mode. FIG. 43 is a flowchart showing the operation in the same-position reading mode in the sheet original through mode. FIG. 44 is a timing chart showing the operation in the same-position reading mode. The timing chart shown
FIG. 45 is a flowchart showing the operation in the separate position reading mode in the sheet original through mode, FIG. 46 is a timing chart showing the operation in the separate position reading mode, and FIG. 47 is the sheet original scanning mode in the sheet original reading mode. Flowchart showing the operation,
FIG. 48 is a timing chart showing the operation of the sheet original scanning mode, FIG. 49 is a flowchart showing the operation of the sheet original manual opening / closing mode in the sheet original reading mode, and FIG. 50 is an operation of the sheet original manual opening / closing mode. FIG. 51 is a timing chart showing the scanning control circuit of the page turning reading unit. A: Multi-function document scanner (MFDS), 1 ... Page-turning reading unit, 1-A
… Home position position, 1-C… End position position, 8… Turn-over transport belt, 9… Turn-over transport belt, 14 …… Second reading sensor unit, 24 …… Central reference positioning unit, 50… Home Position sensor, 52…
… Turn unit drive belt, 60… Turn unit drive motor, 61… Turn transport belt drive motor, 92…
Book manuscript, 200 ... sheet manuscript, 300 ... printer, 31
0 …… Main control board, 311… Turn-over conveyor belt drive control board, 312 …… Turn-over unit drive control board, 3
13 ... Operation display board, 314 ... First image processing board, 3
17 Second image processing board.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuya Fujioka 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (72) Inventor Fumio Kurizumi 1-3-6 Nakamagome, Ota-ku, Tokyo No. Ricoh Co., Ltd. (56) References JP-A-63-13468 (JP, A) JP-A-62-13161 (JP, U) JP-A-62-119058 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04N 1/04-1/207

Claims (1)

(57) [Claims] 1. A document reading apparatus provided with document reading means capable of reading a document, detecting means for detecting a reading start position of the document set at the reading position, and reading start detected by the detecting means. Setting means for selectively setting a first document reading mode for starting reading from a position and a second document reading mode for starting reading from a predetermined reading start reference position; And a control unit for controlling a position at which reading of the document by the document reading unit is started according to the mode.