JPH0519563A - Page turning method and device for book original - Google Patents

Abstract

PURPOSE:To provide page turning method and device for a book original, which can stably execute the repeating of the page turning scan of the book original and have a wide tolerance level by using a fixed belt for separating the book original, and attracting a page to the belt for separating. CONSTITUTION:A nonuniform electric field is applied to a turning/carrying belt 8 by a first bias roller 3. a page turning/reading unit is moved from one end side of a spread book original 92 from the other end side, and the shape of the turning/carrying belt 8 is sequentially deformed, so that the page attracted to the carrying belt 8 in the nonuniform electric field is separated from the next page of the book original 92.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for turning a page of a book document such as a copying machine and a facsimile having a page turning function of a book document.

[0002]

2. Description of the Related 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 the read document is automatically ejected from the document reading position. An automatic document feeder (ADF) is known.

As described above, when the original is a sheet original, the ADF is mounted so that the original information can be automatically read. However, when the original is a book original, automatic page turning is performed. Since it is difficult to realize the mechanism, at present, the pages of the book manuscript can be turned only manually.

In view of the above situation, various proposals have heretofore been made for methods and means for automating the troublesome reading of book originals.

However, the above-mentioned conventional technique has many proposals only for ideas, and has not reached the level at which it can be realized.

[0006] As a conventional technique relating to the automatic reading of book originals, for example, Japanese Patent Laid-Open No. 61-284492 "Automatic page changing device for book-like originals" and Japanese Patent Laid-Open No. 56-60294 "Page turning of book" Apparatus ", JP-A-63-47197," Automatic page-turning apparatus ", JP-A-63-42895," Automatic page-turning apparatus ", JP-A-63-67191," Page-turning apparatus ", Shokaisho Nos. 63-41588, "Page break device for book", JP-A-62-273892, "Page turning device", and JP-A-63-64797, "Page turning device" are proposed.

[0007]

By the way, as mentioned above, among the many proposals that do not go beyond the scope of the idea, for example, JP-A-61-284492 and JP-A-6-284492.
As in the technique described in JP-A-2-35891,
Although there is a proposal that may be put into practical use, this technique is a method in which the reading surface of the document information of a book document is placed facing down and opened, and the page is sucked and separated while moving the book document. Has been adopted.

However, when the book document is moved downward with the book spread document placed face down like this apparatus, the document surface rubs the document placement surface due to the weight of the book document itself. There is a drawback that the page turning operation becomes unreliable.

Further, in this conventional apparatus, there is a problem in that the structure of the page turning apparatus is considerably large.

Among the above-mentioned prior arts, there is a page-turning device configured to turn over the document information surface of a book document that has been opened and perform a page-turning by negative pressure by suction such as rollers and arms. The conventional page turning apparatus of this type has a problem that it is a considerably large apparatus because the large page turning apparatus is configured to move in the upper space of the book document.

Further, this type of page turning apparatus for book originals has a problem that the page turning is not stable.

The present invention has been made in view of the above-mentioned points, and an object thereof is to use a fixed belt for separating book originals, and by adsorbing and separating pages on the belt, the book originals are separated. It is an object of the present invention to provide a method and apparatus for turning pages of a book manuscript having a wide allowable range and capable of stably repeating the page turning scanning.

[0013]

In order to solve the above-mentioned problems, the present invention uses a belt as a page turning means for turning pages of the book original, and a book original opened on this belt by page suction means. Pages are sucked and the shape of the belt is sequentially deformed from one end side to the other end side of the book document, so that the page sucked on the belt is separated from the next page of the book document.

Further, in order to solve the above-mentioned problems, the present invention adsorbs a page of a book original opened by a page turning means composed of a belt for turning the page of the book original. The page adsorbing means and the belt deforming means for separating the page adsorbed on the belt from the next page of the book original by sequentially deforming the shape of the belt from one end side to the other end side of the book original. In the page-turning device, the page-sucking means is a non-uniform electric field applied to the page-turning means.

Further, in order to solve the above-mentioned problems, the present invention comprises a high frequency static eliminator for high frequency static elimination of the unequal electric field applied to the page turning means.

Further, in order to solve the above-mentioned problems, the present invention comprises a member for giving an unequal electric field to the page turning means, and a member for high-frequency neutralizing the unequal electric field given to the page turning means. It is composed of a common bias roller that comes into contact with the page turning means.

[0017]

According to the present invention, since the belt is used as the page turning means for turning the pages of the book document,
The pages of the book original opened by the page adsorbing means are adsorbed to the belt, and the shape of the belt is sequentially deformed from one end side to the other end side of the book original so that the page is adsorbed to the belt. The page is separated from the next page of the book manuscript.

Further, according to the present invention, since the page attracting means is an unequal electric field applied to the page turning means, the page is stable with respect to the belt and is attracted within a wide allowable range.

Further, according to the present invention, the unequal electric field applied to the page turning means is subjected to high frequency static elimination by the high frequency static elimination means.

Further, according to the present invention, the member for giving the unequal electric field to the page turning means and the member for high-frequency neutralizing the unequal electric field given to the page turning means come into contact with the page turning means. It is composed of a common bias roller.

[0021]

Embodiments of the present invention will now be described in detail with reference to the drawings.

However, for the purpose of avoiding complication of the description, the configuration and operation of the range clearly conceivable from the description of the present specification, and the above and other objects and novel features of the present invention are illustrated and illustrated. Disclosure is omitted or simplified.

First, with reference to FIG. 1, a description will be given of a peripheral structure of the turning conveyance belt in the document reading apparatus according to the present invention.

FIG. 1 shows a multi-function document scanner A (hereinafter referred to as "MF") embodying the present invention.
FIG. 3 is a schematic cross-sectional view of (DS ”).

In FIG. 1, the turning conveyor belt 8 includes a driving roller 12, a tension roller 13, a first belt supporting roller 97, a second belt supporting roller 98, a third belt supporting roller 99, a fourth belt supporting roller 100, and And is supported by the fifth belt support roller 101.

At this time, the page-turning conveyor belt 8 passes through the page-turning roller 2, the first bias roller 3, the first roller 4, the second roller 5, and the pressing roller 6 of the page-turning reading unit 1 and turns the page. It is supported so as to surround the reading unit 1.

The tension roller 13 is pulled to the left in FIG. 1 by the belt tension spring 112 to apply an appropriate tension to the turning and conveying belt 8 and press the original surface of the book original 92.

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

On the other hand, in the upper part of the transport section 19 of the MFDS,
A sheet manuscript tray 94 for setting the sheet manuscript 200, a sheet manuscript side guide 93 for adjusting the setting position of the sheet manuscript 200 in the side direction, and a discharge tray 23 on which the discharged sheet manuscript 200 is placed. Are provided, respectively.

Further, the MFDS sheet feeder 21 (upper right in FIG. 1) has a sheet document sensor 25 for detecting whether or not the sheet document 200 is set, and a sheet feed for separately feeding the sheet documents 200 one by one. Roller 96 and paper feed separation pad 95
And a sheet feed sensor 26 for adjusting the sheet feed timing of the sheet document 200.
A first transport guide 108 and a second transport guide 109 that form a transport path of 0 are arranged.

Further, on the outside of the turning conveyance belt 8 on the slightly left side of the belt supporting roller 97, the sheet original 200
There is a second bias roller 11 for charging at the time of conveyance of the sheet, and a bias opposite roller 102 for support is provided inside thereof.
There is.

At the lower end of the second transport guide 109,
The conveyance guide claws 115 are provided to assist the conveyance of the sheet document 200.

Further, the fourth belt supporting roller 100 has a sixth counter roller 105, the fifth belt supporting roller 101 has a seventh counter roller 106, the drive roller 12 has a paper discharge roller 107, and the turning conveyor belt 8 is sandwiched therebetween. They are arranged on the outer sides of the flipping and conveying belts 8, respectively.

Outside the turning conveyance belt 8 from the third belt support roller 99 to the drive roller 12, a third conveyance guide 110 forming a conveyance path for the sheet original 200 is formed.
Is provided.

Here, between the second belt supporting roller 98 and the third belt supporting roller 99, the original placing surface 116 on the upper surface of the original table 18 is used as a conveying path for the sheet original 200.

The original document mounting surface 116 is formed in black in order to facilitate detection of the leading edge of the book original 92 when the size of the book original 92 is detected by prescanning.

On the other hand, in the upper left MFDS discharge unit 22 in FIG. 1, the discharge sensor 2 is provided in front of the discharge roller 107.
8 detects the presence or absence of a jam when the sheet document 200 is discharged.

A paper output separation claw 111 is formed below the paper output port 117 of the paper output unit 22 to assist the smooth output of the sheet original 200.

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

Further, the page turning reading unit 1 is at the end position (stop position of the page turning reading unit 1 in the reading mode of the sheet original 200) 1
In the case of -C, the third counter roller 17 is provided below the first reading sensor unit 9, and the book size upper limit sensor 33 is provided below the turning roller 2.

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

In the central reference positioning portion 24, a central positioning plate 113 that contacts the spine of the book original 92 with the book original 92 placed thereon, and the central positioning plate 11 are provided.
3, a central positioning spring 114 for giving an upward habit and a book original sensor 27 for detecting the downward displacement of the central positioning plate 113 when the book original 92 is placed are respectively provided. There is.

A stand 91 for supporting the MFDS substantially horizontally is provided on the lower portion of the document table 18 thus configured.

On the other hand, a transport unit locking device 140 having a transport unit lock sensor 31 built therein is disposed on both sides of the portion of the transport unit 19 which is in contact with the document table 18, and the transport unit 19 and the document table 18 are connected to each other. The open / closed state is detected.

As described above, this MFDS is configured as an original reading device having both the automatic original feeding / reading function of the sheet original 200 and the reading and automatic page turning functions of the book original. .

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

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

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

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

In FIGS. 2 to 4, in the page turning reading unit 1, the scanning pipe 51 of the turning unit drive plate 49 is fitted to a pair of scanning rods 50 extending in parallel to the front side and the back side of the MFDS. By being inserted, it is slidably supported along the left-right direction of the MFDS.

The ends of each scanning rod 50 are fixed to a transport unit right side plate 58 and a transport unit left side plate 59 of the MFDS.

Further, as shown in FIG. 3, the transport unit front side plate 5 is
A first shaft 64 and a second shaft 65 are rotatably supported between 6 and the rear plate 57 of the transport unit.

A driving pulley 62 and a driven pulley 63 are fixed to the first shaft 64 and the second shaft 65, one on the front side and one on the rear side, respectively.
The drive pulley 62 and the driven pulley 63 are paired, and the two turning unit drive belts 52 are suspended.

This page turning reading unit 1 is shown in FIG.
As shown in FIG. 4, at the drive belt fixing portion 53 of the turning unit driving plate 49, the turning unit driving belt 52 is fixed by the driving belt fixing plate 54 and the driving belt fixing screw 55. It is driven by the rotation of 52.

Further, a first gear 66 is fixed to the rear side plate 57 of the conveying section on the rear side of the first shaft 64, and the first gear 66 turns the first unit drive motor 6 for turning the unit.
The rotation of the turning unit drive motor 60 is transmitted by meshing with the second gear 67 fixed to the output shaft of 0, and the drive pulley 62, the turning unit drive belt 52, the driven pulley 63, and the page turning reading unit 1 are Each is driven. On the other hand, as shown in FIG. 3, a third shaft 121 fixed coaxially with the fourth belt support roller 100,
A fourth shaft 122 coaxially fixed to the drive roller 12,
A seventh shaft 125 coaxially fixed to the paper feed roller 96,
The eighth shaft 126 coaxially fixed to the first belt support roller 97 is rotatably supported between the transport unit front side plate 56 and the transport unit rear side plate 57.

On the fourth shaft 122, the rear plate 5 of the conveying section is attached.
The third gear 68 is fixed on the back side of the seventh gear 68.

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

Further, the turning conveyor belt drive motor 61
The sixth gear 74 fixed to the output shaft of is the fifth gear 73,
Further, the fourth gear 69 meshes with the third gear 68, respectively, and sequentially transmits the rotation of the turning conveyance belt drive motor 61 to drive the driving roller 12 to rotate the turning conveyance belt 8.

As shown in FIGS. 2 and 3, the eighth shaft 126 has a second sheet feeding pulley 130 on the back side of the transport rear plate 57, and the seventh shaft 125 has a rear transport plate. First paper feed pulleys 129 are fixed to the inner side of 57 via paper feed clutches 128, and a paper feed drive belt 127 is suspended between the second paper feed pulley 130 and the first paper feed pulley 129. Has been done.

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

Further, in accordance with a control signal sent from the main control board 310 (see FIG. 34), the paper feed clutch 12
8 operates, and the seventh shaft 125 and the paper feed roller 96 are driven.

On the other hand, the first opposed roller 1 shown in FIG.
5, second opposing roller 16, and third opposing roller 17
Are driven by a drive transmission mechanism (not shown) in synchronism with the turning conveyor belt 8 and at the same peripheral speed.

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

In FIGS. 1 to 4, the first turning unit side plate 40 and the second turning unit side plate 41 are arranged opposite to each other at a position where the turning conveyor belt 8 is sandwiched therebetween. Between the side plate 40 and the second turning unit side plate 41, the turning roller 2
The bias roller 3, the first roller 4, the second roller 5, and the pressing roller 6 are rotatably supported.

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

Therefore, taking the first roller 4 as an example, the description will be made with respect to the first roller 4 as shown in FIG.
Turning unit side plate 40 and second turning unit side plate 41
The fifth shaft 123 whose both ends are fixed to the first roller 4 is inserted into the hollow portion of the first roller 4 formed of a hollow shaft.
Both ends of the first roller 4 are supported by a pair of bearings 131 arranged on the shaft 123, so that the first roller 4 is rotatably supported on 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 does not rotate by itself, but the turning conveyance belt 8
Is rotated only by the rotation of.

Further, the first turning unit side plate 40 and the second turning unit side plate 40
On the outer side of the turning unit side plate 41, a rotation support rod 42 (having the same structure on both sides) is rotatably supported at an extension position in the longitudinal direction of the first reading sensor unit 9 shown in FIG. There is.

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

In FIG. 4, the inclination correcting spring 44 is
Is formed of 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.

The inclination correcting spring 44 is in its natural state, that is, in the state where no external force is applied to the inclination correcting spring 44, the axial direction of the sliding pipe 43 (vertical direction in FIG. 4) and the first reading sensor. Unit 9
The optical axis direction of the reading optical system (the movement 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 (described later in detail)) is made to match.

As a result, the first turning unit side plate 40
When the second turning unit side plate 41 and the second turning unit side plate 41 are integrally rotated about the respective rotation support rods 42, the tilt correction spring 44 causes the first turning unit side plate 40 and the second turning unit side plate 41 to move against the first turning unit side plate 40 and the second turning unit side plate 41. Rotational force always tries to return to the initial posture,
The inclinations of the first turning unit side plate 40 and the second turning unit side plate 41 are corrected at appropriate times.

Further, the sliding pipe 43 is constructed so as to slide smoothly on the sliding support rod 46, as shown in FIG.

The upper end of the slide support rod 46 is fixed to the upper rod support plate 70, and the lower end of the slide support rod 46 is fixed to the lower rod support plate 71.

A first spring retaining claw 47 is formed on the upper rod support plate 70, and a second spring retaining claw 48 is formed on the upper portion of the sliding pipe 43. These first spring retaining claws 47 are formed. And the second spring retaining pawl 48 allows the sliding pipe 43 and the upper rod support plate 7
Both ends of the turning unit upper and lower springs 45 which are axially mounted between 0 and 0 are locked.

Here, the sliding pipe 43 is in contact with the lower rod support plate 71 in a normal state, but when the page turning reading unit 1 receives an external force, it resists the elasticity of the turning unit upper and lower springs 45. Then, it slides upward in FIG. 4 along the sliding support rod 46.

At this time, the sliding force which pushes the second spring retaining claw 48 downward is constantly applied to the sliding pipe 43 by the elastic force of the turning spring 45 of the turning unit to return to the normal state. There is.

In the upward sliding range of the sliding pipe 43, the scan cutoff sensor 34 arranged on the turning unit drive plate 49 detects the upper limit detecting portion 76 provided on the sliding pipe 43. In this state, the sliding position of the sliding pipe 43 upward is set to the limit position.

On the other hand, the turning unit drive plate 49 is shown in FIG.
As shown in, the upper rod support plate 70, the lower rod support plate 71, the first spring stop claw 47, the scanning pipe 51, the drive belt fixing portion 53, and the home detection filler 75 are integrally formed. The driving belt fixing portion 53 of the turning unit driving plate 49 is fixed to the turning unit driving belt 52 by the driving belt fixing plate 54 and the driving belt fixing screw 55 as described above. Further, the scanning pipe 51 of the turning unit drive plate 49 is fitted so as to slide smoothly on the scanning rod 50.

As a result, as described above, when the page-turning unit driving belt 52 is driven and the page-turning reading unit 1 reaches its home position 1-A, the home sensor 30 shown in FIG. The home detection filler 75 of the scanning pipe 51 is configured to be detected.

Next, with reference to FIGS. 6 to 8, the structure of the conveyance unit locking device in this document reading device will be described.

FIGS. 6 to 8 are schematic views showing one configuration of the transport unit locking device 140 (both sides have the same configuration) arranged on both sides of the MFDS.

The transport unit locking device 140 is composed of a lock release solenoid 132, a lock rod 134 and the like.

In FIGS. 6 to 8, the lock release solenoid 132 is connected to one end of the lock release solenoid arm 133.

The other end of the unlock solenoid arm 133 is rotatably supported by one end of the lock rod 134.

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

At the other end of the lock rod 134, a lock release solenoid arm 133 is arranged, but a lock claw 134a bent toward the arm is formed.

The lock rod 134 is rotatably supported by the rotating part 136, and the upper part of the rotating part 136 is
It is connected to one end of the lock spring 135.

The other end of the lock spring 135 is connected to a part of the transport section 19 to give the lock rod 134 a turning tendency in the clockwise direction in FIG. There is.

The rotation of the lock rod 134 due to the rotation habit is blocked at a predetermined angle by a lock claw stopper 137 arranged on the lower left side of the rotating portion 136.

On the other hand, the lock pin 13 is provided on the document table 18 side.
9 and a lock portion 138 in which the transport portion lock sensor 31 is arranged is formed.

In FIG. 6, when the transport portion 19 is closed while being pushed down, as shown in FIG. 7, the lock pin 139 is released.
The lower end of the lock claw 134a of the lock rod 134 comes into contact with the lock rod 134, and the lock rod 134 is rotated counterclockwise about the rotation portion 136 as a rotation axis. From this state, the transport unit 1
When 9 is further closed, as shown in FIG. 8, the lock claw 134a of the lock rod 134 is caught by the lock pin 139, and the transport unit 19 is fixed to the document table 18.

In addition, when the transport unit 19 is locked,
The lock claw 134a of the lock rod 134 operates the transport unit lock sensor 31.

The release of the lock of the transport unit 19 is shown in FIG.
It 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 unlock solenoid 13 is released.
2 operates, the lock rod 134 rotates counterclockwise around the rotating portion 136 as a rotation axis, the lock claw 134a of the lock rod 134 is disengaged from the lock pin 139, and the transport portion opening / closing spring (not shown) causes the transport portion to move. 19 is opened upward (see FIG. 10).

However, this open key 620 is programmed so that it does not operate (input is not accepted) during a series of page turning scanning of the book original 92, during reading scanning, and during conveyance of the sheet original 200. Has been done.

Further, when the open key 620 does not accept the input as described above, the electromagnetic lock 141 is operated, and the electromagnetic lock 141 causes the lock claw 134a to operate.
The lock rod 134 is configured so that its rotation is restrained while the lock rod 139 is still engaged with the lock pin 139.

The MFDS constructed as described above is shown in FIG.
Also, as shown in FIG. 10, the printer 300 is used by being mounted on the top of the printer 300, for example.

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

Next, referring to FIG. 11 to FIG.
The configuration of the first reading sensor unit 9 inside the page turning reading unit 1 in this document reading apparatus will be described.

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. 13 is a view of the end of the first reading sensor unit 9. It is a detailed sectional view.

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

The first reading sensor unit 9 is shown in FIG.
As shown in, the upper portion is covered with a reading sensor bracket 146 formed in a U shape, and the reading sensor bracket 146 is arranged so as 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 portion 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.

As a result, the first reading sensor unit 9 is supported by the reading sensor stud 148 so as to be vertically movable with respect to the reading sensor bracket 146.

Here, the reading sensor stud 148 and the boss 149 are configured so that their fittings are not disengaged from each other by the flange-like hooking portion formed at the lower end of the reading sensor stud 148.

A read sensor spring 147 is axially mounted between the base of the read sensor stud 148 of the read sensor bracket 146 and the base of the boss 149 of the first read sensor unit 9. By the extension force of 147, the first
The reading sensor unit 9 is urged to have a downward habit.

As a result, the first reading sensor unit 9 is always located at the lowermost portion of the page turning reading unit 1 and, for example, when an external force is applied by the unevenness of the surface of the book original 92, this external force is applied. Without going against
The book document 92 is smoothly moved up and down along the unevenness of the surface.

As shown in FIG. 11, a read sensor release solenoid 150 is attached to the end of the first read sensor unit 9 via a read sensor release solenoid arm 151.

This reading sensor release solenoid 150
As shown in FIG. 12, the first turning unit side plate 40
When the page turning reading unit 1 is moved without performing the document reading operation by the first reading sensor unit 9, for example, during the page turning operation, during the blank scanning of the non-read page, and the sheet document. The read sensor release solenoid 150 is activated when the scan mode returns.

This reading sensor release solenoid 150
Is operated, the first reading sensor unit 9 is moved upward against the elastic force of the reading sensor spring 147, and the original scanning surface is retracted (separated) from the surface of the original.
To be done.

The first reading sensor unit 9 has an encoder 15 which is emitted by the rotation of the turning roller 2.
The signal 2 is used as a reference signal for reading the image.

The turning roller 2 and the encoder 152
Is constructed as shown in FIG.

FIG. 14 shows a side view of the rear side of the turning roller 2.

In FIG. 14, a crown-shaped filler 153 is arranged at the rear end of the turning roller 2.

The filler 153 is formed by forming slits of equal width at equal intervals on the circumference.

The encoder 152 is fixed to the second turning unit side plate 41 so that the filler 153 is vertically sandwiched.

As a result, in the encoder 152, the filler 153 periodically interrupts the detection optical path of the encoder 152 in response to the rotation of the turning roller 2, so that the reference signal for image reading of the first reading sensor unit 9 is generated. .

On the other hand, a book document 92 for the document table 18
The central reference positioning section 24 performs positioning of the.

A detailed sectional view of the central reference positioning portion 24 is shown in FIG.

The central reference positioning portion 24 is a reference position for reading and scanning the book document 92 and for page turning scanning.

The central reference positioning portion 24 is provided on the document mounting surface 1
It is configured in a groove formed at the center of 16.

A central positioning plate 113 is provided in this groove.
The document mounting surface 116 is fitted so as to be movable up and down.
The central positioning plate 113 is always provided with a habit of ascending by a central positioning spring 114 arranged below the central positioning plate 113.

The upward movement of the central positioning plate 113 due to this behavior is prevented by the stopper claw 119 of the central positioning plate 113 contacting the stopper 118 formed at the edge of the groove of the document placing surface 116. , Hirao, No. 1
It is stopped at the position shown by the broken line in FIG.

The book original 92 is set on the original placing surface 116 by placing the spine (binding portion) of the book original 92 on the central positioning plate 113 in the groove.

That is, when the spine (binding portion) of the book original 92 is placed on the central positioning plate 113 in the groove, the central positioning plate 11 is placed under the weight of the book original 92 itself.
3 is pushed down.

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

An MFDS operation display board 313 is arranged on the entire surface of the original table 18 (see FIGS. 9 and 10).

The operation display board 313 is provided with a large number of input keys as shown in FIG.

The functions of these input keys will be described below in order.

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

The enter key 601 is pressed to finalize the input at the time of ten-key input or selection input on the liquid crystal display panel.

The ten-key pad 602 is used for
It is also used when setting the number of pages to be turned. The reading start page selection key 603 is a key for selecting which of the “left” and “right” pages of the book document 92 to start reading in the book document reading mode. Each time the button is pressed, the left and right of the reading start page of the book document 92 is switched.

The reading start page at the initial setting of this key is set to the "left" page, and the reading start page selected by this key is the book document 9
It is displayed on the left or right of 2 depending on which of the two reading start page display LEDs 631 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 document reading mode.

The total number of read pages of the book original 92 is determined by pressing the read total page setting key 606.
After inputting the number of pages with the ten keys 602, the enter key 601 is pressed to confirm the number, and the confirmed value is displayed on the liquid crystal display panel 630.

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

Each time this key is pressed, the display of the book size display LED 632 is switched in the order of "automatic" / "standard" / "irregular (mm input)". The displayed mode is selected.

When the book size selection key 607 is initially set, the display of the book size display LED 632 is "automatic", and the "automatic book size recognition mode" is selected.

Here, the book size key input mode includes "standard size" and "irregular size (mm input)". Select "standard size" only when the book size is A5 / B5 / A4. By doing so, it becomes possible to input the book size using the standard book size selection key 619.

The standard book size selection key 619 is 1
Each time the button is pressed, the display of the fixed-size book size display LED 633 is switched in the order of “A5”, “B5”, and “A4”, and the selected book size is displayed and recognized.

When the standard book size selection key 619 is initially set, the standard book size display LED 633 displays "A4".

However, the book size here means the size of the cover of the book original 92.

Here, when the book original 92 is other than the standard book size described above, the book size selection key 6
"Custom (mm input)" is selected with 07, and the numeric keypad 602 is used to set the vertical size of the set book original 92,
After inputting the horizontal size (mm unit), the enter key 601 is pressed to fix the book size.

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

Book binding portion mask area setting key 608
Is for setting whether the non-reading area (mask area) from the center of the central reference positioning unit 24 is “left (−)” or “right (+)” in the book document reading mode. Is pressed.

That is, when the mask area is formed in the book binding portion of the book original 92, first, the book binding portion mask area setting key 608 is used to set which of the left and right pages of the book original 92 the mask area is formed. Then, after inputting the length (mm unit) of the set "left mask area (-)" or "right mask area (+)" with the ten keys 602, this input value is entered with the enter key 601. To confirm.

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

This book binding portion mask area setting key 60
The value of the mask area at the time of initial setting of 8 is “± 10 m
m ”.

The reading area selection key 609 selects one of "one page (left)", "one page (right)", and "both pages" for the reading area of the book original 92 in the book original reading mode. Pressed when selecting whether or not.

Each time the reading area selection key 609 is pressed once, the reading area display LED 636 displays
It is switched in the order of “one page (left)”, “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 reading area display LED 636 displays "both pages".

Here, when "single page (left)" is selected, the reading scan of only the left page is performed toward the book document 92, and the reading scan of the right page is not performed.

If "single page (right)" is selected, the scanning for reading only the right page toward the book document 92 is performed, and the scanning for reading the left page is not performed.

The spread two-way continuous shooting key 610 is used for the "two-page spread continuous reading mode" in the book document reading mode,
Also, in the "double-sided mode", the button is pressed to instruct to print out the read document information at the same magnification.

The double-page spread continuous reduction key 611 is for instructing to print out the read original information at a reduction ratio in the "two-page spread continuous reading mode" of the book original reading mode and the "double-sided mode". It is pressed when doing.

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

Further, the reference reduction ratio when the spread continuous copying reduction key 611 is initially set is "original size x
The double-sided mode selection key 612 set to "0.71 (A3⇒A4 / B4⇒B5)" is selected when the book document reading mode is the "double-sided one-page break reading mode". "Double-sided spread mode" to indicate which side is to be printed and which side is to be printed
・ "Original duplex mode" and "Sequential duplex mode" 3
Pressed when selecting from two double-sided modes.

Each time the double-sided mode selection key 612 is pressed once, the display of the double-sided mode display LED 634 is switched and selected in the order of "spread double-sided mode", "original double-sided mode", and "sequential double-sided mode". The reading area is displayed and recognized.

When the double-sided mode selection key 612 is initialized, the double-sided mode display LED 634 displays "original double-sided mode".

Here, when the "two-page spread double-sided mode" is selected, double-sided printing is executed with the left page of the left and right pages of the book document 92 that has been opened facing up and the right page facing up. It

At this time, the reading start page selection key 6
When the reading start page of the book document 92 is set to “right” according to 03, the first print of the first sheet is a single-sided print.

Also, here, "original double-sided mode"
When is selected, of the left and right pages of the book document 92 that has been opened, the right page is the front side, and the left page of the next page turned by the page turning operation is the back side,
Double-sided printing is executed.

That is, this "original double-sided mode"
Then, the booklet 92 is printed in exactly the same way as the binding of the book document 92 to be read.

At this time, the reading start page selection key 6
When the reading start page of the book document 92 is set to “right” according to 03, the first first print is a single-sided print, as in the case of the “two-page spread mode”.

Further, here, when the "sequential double-sided mode" is selected, the page set by the read start page selection key 603 of the left and right pages of the book document 92 that has been opened is set as a table, and the page is set. The next page turned over by the turning operation is turned to the back, and thereafter, double-sided printing is executed in the order of reading sequentially.

Spread continuous shooting high-speed print setting key 613
Is continuous in the book manuscript reading mode in the "single-sided mode" of the "two-page spread continuous reading mode" without decelerating or stopping the operation of the page turning reading unit 1 near the binding portion of the book manuscript 92. This is pressed when reading and scanning is performed to instruct continuous printing of both left and right pages of the book document 92.

A print scaling key 614 is a key for setting a scaling ratio when a 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 factor is set by the cursor movement key 61.
The cursor is moved to the desired scaling ratio in step 7, and the enter key 601 is pressed to confirm.

The image processing setting key 615 is a key for setting the image processing mode when the read image is image processed and printed.

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

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

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

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

Here, the operation mode of the MFDS is determined by pressing the enter key 601 after aligning the operation mode cursor of the desired MFDS.

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

Read skip page setting key 618
Is a key for setting a page to be skipped without executing the reading scan in the book document reading mode.

That is, if there is a page to be skipped without executing the document reading scan among the pages of the book document 92, first, the read skip page setting key 618 is pressed, and then the book document 92. Numeric keypad 602 indicates the page number of the page to be skipped (skip page) from the read start page.
After inputting with, the enter key 601 is pressed to confirm this skip page.

The skip page input in this way is displayed on the liquid crystal display panel 630.

The standard book size selection key 619 is a key for selecting the book size of the book document 92.

As described above, the book size key input mode includes "standard size" and "irregular size (mm input)", and only when the book size is A5 / B5 / A4.
By selecting "standard size", the book size can be input by the standard size book size selection key 619.

The standard book size selection key 619 is 1
Each time the button is pressed, the display of the fixed-size book size display LED 633 is switched in the order of “A5”, “B5”, and “A4”, and the selected book size is displayed and recognized.

When the standard book size selection key 619 is initially set, the standard book size display LED 633 displays "A4".

However, the book size here means the size of the cover of the book document 92.

[0187] The open key 620 is pressed to open the transport unit 19 of the MFDS.

In the sheet original reading mode, the sheet original set selection key 625 selects the original surface of the sheet original 200 set on the original placing surface 116 in the "single-sided original reading mode" of the "sheet original through mode". This is a key for selecting either "up" or "down".

This sheet original set selection key 625 is 1
Each time the sheet document is pressed, the display of the sheet document set display LED 635 is switched in the order of “upward” and “downward”,
The selected sheet original setting surface is displayed and recognized.

When the sheet document set selection key 625 is initially set, the display of the sheet document set display LED 635 is "upward".

Next, the printer 3 shown in FIG. 9 and FIG.
00 will be described.

FIG. 17 is a schematic sectional view of the printer 300.
Shown in the figure.

The image information after the image processing is the printer 300.
In the writing section, the laser scanning is performed on the photosensitive drum 170 in the form of a set of light spots by raster scanning.

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

In FIG. 18, the laser light emitted from the semiconductor laser 171 is converted into a parallel light flux by the collimator lens 172, and shaped into a constant light flux by the aperture 173.

The shaped beam is incident on the polygon mirror 175 while being compressed in the sub-scanning direction by the first cylinder lens 174.

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

The rotation speed of this polygon mirror 175 is
It is determined by the speed of the photosensitive drum 170, the writing density, and the number of surfaces.

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

This deflected laser light is incident on each fθ lens 177a, 177b, 177c.

These fθ lenses 177a, 177b,
177c is a photosensitive drum 17 for scanning light with a constant angular velocity.
It has a function of performing conversion at a constant speed on 0, a function of forming an image of this scanning light on the photoconductor drum 170 so as to form a minimum light spot, and a function of correcting the surface tilt.

Each fθ lens 177a, 177b, 177
The light that has passed through c is guided outside the image region by the synchronization detection mirror 178 to the synchronization detection sensor 179, and after a certain period of time after the synchronization signal for outputting the cue signal in the main scanning direction is output, the image data becomes 1 Only the lines are output.
By repeating this, one image is formed.

On the other hand, a photosensitive layer is coated on the surface of the photosensitive drum 170.

Here, the semiconductor laser 171 has a wavelength of 780 nm.
Organic photoconductors (OPC), α-Si, Se-Te, and the like are known as photoconductors having sensitivity to the wavelength, but in the present embodiment, organic photoconductors are used.

Generally, in the case of laser writing, there are an N / P process of shining light on the image portion and a P / P process of shining light on the background portion. In this embodiment, the laser writing process The N / P process that illuminates parts is adopted.

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

Next, the negatively charged photosensitive drum 1
When the image portion of 70 is irradiated with laser light and the potential of the image portion is reduced, the surface potential of the photoconductor drum 170 is −750 to −800 V and the image portion potential is −50.
An electrostatic latent image of about V is formed.

With this electrostatic latent image, a bias voltage of -500 to -600 V is applied to the developing roller of the developing device 181, and
The negatively charged toner makes it visible.

The image visualized by the developing device 181 is charged with a positive potential from the back surface side of the transfer paper, which is fed in synchronism with the rotation of the photosensitive drum 170. It is transferred by the transfer action of the transfer charger 182.

The transfer paper to which this image has been transferred is separated charger 183 held integrally with transfer charger 182.
AC removal of electricity by the photoconductor drum 17
Separated from the 0 surface.

At this time, the toner remaining on the photoconductor drum 170 without being transferred to the transfer paper is scraped off from the surface of the photoconductor drum 170 by the cleaning blade 184, and is disposed around the cleaning blade 184. It is collected in the stored tank 185.

Further, the potential pattern remaining on the surface of the photoconductor drum 170 is erased by irradiation with light from the charge eliminating lamp 186.

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

The photo sensor 187 is composed of a light receiving element and a light emitting element, measures the reflection density of the surface of the photoconductor drum 170, and the reflection density (toner density after development) is set as a reference. When the value becomes less than or equal to the value, a toner replenishment signal for replenishing the developing device 181 with new toner is output.

That is, in the photo sensor 187, for example, a fixed pattern (pure black or halftone dot pattern) is written at the position corresponding to the reading position of the photo sensor 187 by the optical writing unit, and this pattern is developed. The density of the developed image is judged from the ratio of the light reflectance of the subsequent pattern portion and the light reflectance of the photosensitive drum 170 outside this pattern portion, and when the density of this image is lower than the reference value. It is configured to output a toner replenishment signal.

Here, when the new supply toner is insufficient, the photosensor 187 is utilized by utilizing the fact that the development density does not increase even if the toner supply signal is output.
May be used also as a sensor for detecting the shortage of the remaining amount of toner.

On the other hand, the printer 300 of this embodiment is provided with a plurality of cassettes 188a and 188b, and is constructed so that the transfer paper on which the image has been once transferred can be double-sided fed through the refeed loop 189. ing.

That is, in FIG. 17, when the start button of the printer 300 is pressed after a predetermined cassette is selected, the paper feed roller 190a, 190b selected from the paper feed rollers 190a, 190b of the cassettes 188a, 188b is selected. The rollers are rotated and the transfer paper in the cassette is fed until it abuts on the nip of the registration roller 191.

The registration roller 191 starts its rotation at a timing at which the position of the image formed on the photoconductor drum 170 and the position of the transfer paper are synchronized, and the registration roller 191 is transferred to the surface of the photoconductor drum 170. Feed the paper.

As a result, as described above, an image is transferred onto the transfer sheet, and after being separated from the surface of the photoconductor drum 170, the transfer sheet is sucked and conveyed to the separating and conveying section 192, and the heat roller 193, and The toner transferred onto the paper surface is fixed by the fixing roller composed of the pressure roller 194.

On the transfer paper on which the toner is fixed, the switching claw 195 faces the position as shown in FIG.
The sheet is discharged onto the discharge tray 169 through the discharge port of 00.

Here, when the print mode of the printer 300 is the "double-sided mode", the switching claw 195 is set as shown in FIG.
The position is switched to the position shown in (b), and the transfer sheet is conveyed toward the double-sided conveyance path formed on the left side of the printer 300.

This transfer paper passes through the reverse guide claws 196 and is once guided to the reverse guide tray 197.
The reversing guide claw 196 is switched, and the reversing guide roller 198 is reversely rotated (reversed).
The sheet is fed until it abuts the nip 1.

The transfer paper re-fed in this way is
In the same manner as the above-mentioned normal printing, the photosensitive drum 1
After the toner image formed on 70 is transferred and fixed,
The sheet is discharged onto the sheet discharge tray 169 via the switching claw 195, which is switched to the initial state shown in FIG.

[0225] Here, the transfer paper is discharged by making the image fixing surface of the transfer paper face the stacking surface of the discharge tray 169 at the time of discharging in the single-sided print mode.
If is set, the switching claw 195 is switched to the position shown in FIG. 19B as in the case of the above-mentioned “double-sided mode”, and the transfer sheet is temporarily discharged without being ejected as it is. It is transported toward the transport path.

Then, the rear end of the transfer paper is changed to the switching claw 19.
5 and immediately after that, the switching claw 195 is moved to the position shown in FIG.
While being switched to the position shown in (c), the rotation direction of the switchback roller 199 is reversed, and the transfer paper guided to this double-sided transport path is switchback transported,
The sheet is discharged onto the sheet discharge tray 169 through the sheet discharge port of the printer 300.

In the "rear surface discharge mode", the transfer paper printed on one side has the image fixing surface on the discharge tray 169.
Since the sheet is discharged onto the sheet discharge tray 169 so as to face the stacking surface of the sheet, the transfer sheet is discharged in the order of the print page of the document in the order of the reading page of the document.

By the way, the page turning reading unit 1
4, as described with reference to FIG. 4, between the first turning unit side plate 40 and the second turning unit 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 rotatably arranged.

As shown in FIG. 20, the turning roller 2, the first roller 4, the second roller 5, the pressing roller 6 and the first bias roller 3 are wound around the turning roller 2, as shown in FIG. There is.

A first high-voltage power supply 320 is connected to the first bias roller 3 so that the first bias roller 3 can be attracted by two ports.
The AC voltage of each frequency for static elimination is configured to be applied respectively.

Further, inside the page turning reading unit 1, a turning guide 10 is provided between the turning roller 2 and the first reading sensor unit 9, and above the turning guide 10, a turning conveyance belt. The page accommodating portions 7 are arranged along the inner peripheral surface of each of the pages 8.

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

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

Further, the first reading sensor unit 9 is disposed between the turning roller 2 and the pressing roller 6 as described with reference to FIG.

The first reading sensor unit 9 is attached to the page turning reading unit 1 so as to be vertically movable by about 3 mm, and is pushed downward by the reading sensor spring 147 to read the book original when reading the original. 92, or the document surface of the sheet document 200.

Also, this first reading sensor unit 9
As shown in FIG. 21, is an LED as a document illumination system.
316, an RMLA 81 (roof mirror lens array) as an image forming system for a document image, and a Si equal-magnification sensor 315 as a photoelectric conversion system for converting a formed light image of the 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 condensed on the document surface by the bar lens 83, and the document is illuminated.

Next, the light reflected from the document surface is reflected by the optical path separation mirror 84, passes through the LA 85 (lens array) and the RMA 86 (roof mirror array), and is reflected again by the optical path separation mirror 84. It 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 formed on the Si equal-magnification sensor 315 is converted into an electric signal. Converted and read.

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

First, the reading of the original in this embodiment is performed in the following procedure.

When the original is the book original 92, the open key 620 of the operation display board 313 is pressed to display the original in FIG.
As shown in FIG. 3, the conveyance unit 19 is opened upward, the binding portion (back) of the book original 92 is set in the central reference positioning portion 24 of the original table 18, and the reading start page of the book original 92 is opened upward. Then, the transport unit 19 is closed as shown in FIG.

In this state, each key of the operation display board 313 is operated to set the reading condition of the book document 92, and then the start key 600 is pressed to start the MFDS.

As a result, as shown in FIG. 1, the turning unit drive belt 52 moves the turning unit drive motor 6
Driven by 0, the page turning reading unit 1
From the home position 1-A at the left end, the movement starts in the right direction, and by the movement of the page turning reading unit 1, the first reading sensor unit 9 causes the book document 92 to move.
Read the manuscript information of.

At this time, the turning and conveying belt 8 has its rotation stopped and holds the document surface of the book document 92 that is opened 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 extends along the slide support rod 46. By moving up and down,
The first reading sensor unit 9 is moved along the document surface of the book document 92 while the first reading sensor unit 9 is in close contact with the document surface.

Further, this page turning reading unit 1
However, when reaching the book document reading midway position 1-B in the approximate center of the book document 92, an attraction AC voltage is applied to the first bias roller 3 from the first high voltage power supply 320 shown in FIG. A stripe-shaped charge pattern is formed on the turning conveyance belt 8.

In this way, the page turning reading unit 1
Moves to the end position 1-C at the right end of FIG. 1 while forming a stripe-shaped charge pattern on the turning conveyance belt 8, and the first reading sensor unit 9 reads the original information of the book original 92. .

When the reading of the document information of the book document 92 is completed as described above, the page turning reading unit 1 moves from the end position 1-C to the home position 1-A as shown in FIG. Towards
It is moved back.

At this time, as shown in FIG. 23, an uneven electric field is generated on the turning conveyance belt 8 due to the charge pattern formed during the reading operation, and this electrostatic field causes the book original 92 to be generated. The right page of the above is electrostatically attracted to the turning conveyance belt 8.

Therefore, in this state, the page turning reading unit 1 is moved toward the end position position 1-C, and the page turning reading unit 1 is moved to the position shown in FIG.
When the page-turning start position 1-D shown in FIG. 24 is reached, as shown in FIG. Get caught in.

As described above, the page turning reading unit 1
With the movement of the page-turning reading unit 1, the original document caught inside is gradually separated from the front-turning conveyance belt 8 by the curvature separation of the turning roller 2 and the stiffness of the original document. To be done.

The document thus gradually separated from the turning and conveying belt 8 is moved along the flip guide 10 shown in FIG. 20, and the pages are arranged on the downstream side in the moving direction of the document. Guided into the section 7.

As shown in FIG. 20, the page accommodating portion 7 is formed in a cylindrical shape, and by winding the original wound in the page turning reading unit 1 along the inner peripheral surface thereof. It is possible to store one page of a document that has been read in a very small space.

Therefore, this page turning reading unit 1
As shown in FIG. 22, the page turning reading unit 1 is returned from the turning starting position 1-D toward the winding completion position 1-E to finish the reading. The original for the page and the original for the next page to be read by the next reading operation can be separated very smoothly.

In the original stored in the page storage portion 7 in this manner, the page turning reading unit 1 passes the center of the book original 92 from the winding completion position 1-E to the left page of the book original 92. Gawano page discharge position 1
By further returning to −F, the page-turning reading unit 1 and the document stored in the page-turning reading unit 1 are moved relative to each other, so that the document is removed from the page-turning unit 7 of the page-turning reading unit 1. It begins to be discharged.

[0257] Then, the page turning reading unit 1
However, by returning to the home position position 1-A and completing the movement, the discharge of the document stored in the page storage unit 7 of the page turning reading unit 1 is completed, and the reading is completed. The operation of turning one page of the original document is completed.

On the other hand, during the operation of turning over the original, from the time immediately after starting the winding of the original into the page storage portion 7 of the page turning reading unit 1 to the time when the winding of the original is completed, the first On the bias roller 3,
By applying an AC voltage for static elimination from the first high-voltage power supply 320 shown in FIG. 20, the charge pattern formed on the turn-and-transport belt 8 is programmed to be neutralized.

Therefore, this page turning reading unit 1
At the time of the return movement of, since the electrostatic attraction force is not generated between the document that has been read and the sheet-turning and conveying belt 8, the document winding operation and the discharging operation are performed. It can be done extremely smoothly.

By the way, conventionally, as an apparatus for holding and carrying a sheet member or the like, an apparatus by an air suction method or an electrostatic attraction method by a comb-teeth electrode and an electric double layer method is known.

As a page turning device for book originals, a device applying an air suction method or the like has been proposed.
However, each of these methods has drawbacks as will be described later, and it is almost impossible to put a book page turning device into practical use based on these methods.

That is, since the air suction method requires an air pump for sucking air to generate a negative pressure and an air suction path, it has a drawback of increasing the size of the apparatus.

In the comb-teeth electrode embedding method, two comb-teeth electrodes are embedded in a dielectric so that their teeth mesh with each other, and a positive electrode voltage and a negative electrode voltage are applied to the respective electrodes. Therefore, not only the cost becomes high, but also it becomes difficult to form the document turning and conveying belt into an endless belt.

Further, in the electric double layer system, the belt and the sheet are charged with electric charges of opposite polarities by corona discharge or the like. Therefore, when turning pages of a book document or the like, it is necessary to separate only the turning pages beforehand. I can't charge.

Further, for example, in other page-turning methods using the frictional force of a rubber roller or the like, the page-turning accuracy is markedly restricted by the paper quality and size of the book original, so that its reliability can be improved. It will be difficult.

On the other hand, in the present embodiment, as shown in FIGS. 20, 23 and 24, the endless belt is used.
By applying an adsorption AC voltage from the high-voltage power supply 320 to the turning conveyance belt 8, an alternating stripe shape or a charge pattern such as a checkered pattern is formed on the surface of the turning conveyance belt 8 to turn the turning conveyance belt 8. An unequal electric field is generated on the conveyor belt 8 to hold and convey a document, and
I am turning pages. Therefore, according to this page-turning method, the document can be held and conveyed, and the page-turning operation can be performed extremely smoothly.

The basic structure of this page turning method and the principle of electrostatic attraction will be described below.

As the page-turning conveyor belt 8 used in this page-turning method, a belt having a two-layer structure in which the back surface of the dielectric material formed in the shape of an endless belt is subjected to a conductive treatment is used.

As a means for generating an unequal electric field with respect to the turning conveyance belt 8, for example, the first bias roller 3 rotatably supported by contacting the peripheral surface with the surface of the turning conveyance belt 8, An AC voltage for adsorption may be applied by the first high voltage power supply 320.

As shown in FIGS. 20 and 23, while the conductive layer 8b of the turning conveyance belt 8 is used as a ground surface, an alternating electric field is applied to the first bias roller 3 and the turning conveyance belt 8 and the first bias roller 3 are applied. By moving the roller 3 relative to each other, a stripe-shaped charge pattern is formed on the surface of the dielectric 8a of the turning and conveying belt 8.

As a result, an unequal electric field is generated near the surface of the dielectric 8a of the turning and conveying belt 8.

When a dielectric such as a sheet of paper to be read is brought close to the unequal electric field, the inside thereof is polarized, and the electric field is unequal. The attractive force of.

This is clarified by applying the stress of maxwell over the surface of this paper for the area.

Here, the stress of maxwell is

[0275]

[Equation 1]

It is represented by

If the X-axis is the direction of the surface of the turning and conveying belt 8, the maxwell stress in the X-axis direction is

[0278]

[Equation 2]

Expression (b) represented by

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

That is, the object force (adsorption force) N of this sheet.
Is

[0282]

[Equation 3]

It becomes

Accordingly, assuming that the friction coefficient of this sheet is μ, the conveying force F of this sheet is

[0285]

[Equation 4]

It is represented by the formula:

As a concrete constitution of the present embodiment, as the turning conveyor belt 8, an endless film having a thickness of 10 μm and a vapor-deposited aluminum layer (conductive layer 8 b) formed on a PET film (dielectric 8 a) having a thickness of 75 μm is used. A belt was used, and the pitch of the charge pattern formed on the belt was 2.4 mm.

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

The applied voltage is ± 2 kVp-p in FIG.
FIG. 26 shows the experimental value of the pitch characteristic of the carrier force when the applied voltage is constant to ± 2 kVp-p, and FIG. 27 shows the experimental value of the pitch characteristic of the charge pattern when the applied voltage is constant. The experimental value of the applied voltage characteristic of the conveying force when the constant is 2.4 mm, and FIG. 28 shows the experimental value of the applied voltage characteristic of the attracting force when the pitch of the charge pattern is constant at 2.4 mm.

As is clear from these experimental values, the pitch of the charge pattern and the applied voltage used in this embodiment are not limited to the above-mentioned values.
The charge pattern pitch is 0.5 mm to 10 mm
Within the range, and the applied voltage is ± 1k
It may be Vp-p or more.

Further, in this embodiment, as the high-frequency AC voltage for static elimination, the frequency of 2 kHz and the applied voltage of ± 2 kVp-p are used, but the static elimination effect can be obtained for each of these values. Any value may be used as long as it is a value.

By the way, in the above embodiment, by applying an AC voltage to the first bias roller 3 by the first high voltage power source 320, the conveyor belt 8 is positively and negatively charged, and the surface of the conveyor belt 8 is charged. It is configured to generate an unequal electric field in the vicinity to hold and convey a document and turn a page.

Here, if the voltage applied to the conveyor belt 8 is an alternating voltage, the original can be sucked, and it is not necessary to limit it to only the AC voltage. That is,
AC voltage is a current that periodically changes its direction,
It means that the average value is “0” over one cycle, and the present invention is not limited to such a voltage. However, by setting the voltage applied to the conveyor belt 8 to be an AC voltage, a temporary effect that the original attraction force of the conveyor belt 8 is made uniform can be obtained.

Therefore, as a means for generating an unequal electric field in the vicinity of the surface of the conveyor belt 8, a structure other than the above embodiment may be used.

For example, as a means for generating an unequal electric field in the vicinity of the surface of the conveyor belt 8, FIG. 29 and FIG.
As shown in FIG. 0, a checkered pattern is formed on the outer peripheral surface of the bias roller 3-A made of a conductive electrode roller made of metal or the like.
Therefore, a DC voltage may be applied. According to this means, only the convex portion 3a forming the outer peripheral surface of the bias roller 3-A comes into contact with the surface of the conveyor belt, and the concave portion 3b does not come into contact with the surface of the conveyor belt 8. A checkered high-density charge pattern corresponding to the unevenness of the peripheral surface of No. 8 is formed.

As a result, there is a stronger electric field than the other parts at the boundary between the charged area (+ part in FIG. 29) and the non-charged area on the conveyor belt 8 which is a dielectric, and the unequal electric field is generated. The pages of the book document are electrostatically strongly attracted to the transport belt 8 by the strong electric fields formed and generated at the respective edges of the checkered charge pattern.

When the charge pattern is a checkerboard pattern as in the second embodiment, the unit of the checkerboard pattern is a substantially square, so that the stripe as in the first embodiment shown in FIG. Since the length of the edge portion existing in the unit area is approximately doubled as compared with the pattern charge pattern, the holding and attracting force of the original page is doubled and the reliability of the page turning operation is improved.

On the other hand, in the second embodiment, the checkered pattern is formed by forming the unevenness on the peripheral surface of the bias roller 3-A. However, for example, printing or printing on the surface of the insulating roller made of resin or ceramic. A checkered conductive layer pattern may be formed by vapor deposition, or a checkered sheet-like electrode may be adhered to electrically connect the conductive layer pattern and the electrodes.

Further, as a third embodiment for generating an unequal electric field in the vicinity of the surface of the conveyor belt 8, as shown in FIG. 31, a charge giving member entirely made of a conductive material such as metal. On the outer peripheral surface of the roller-shaped electrode 3-B, a large number of flange-shaped electrode portions 3c and peripheral groove-shaped non-electrode portions 3d are alternately arranged along the axial direction of the roller-shaped electrode 3-B. Alternatively, a DC voltage may be applied to the roller-shaped electrodes 3-B by the first high-voltage power supply 320. According to the third embodiment, similarly to the first embodiment, a stripe-shaped charge pattern in which charging regions and cost charging regions are linearly alternately arranged is formed on the surface of the conveyor belt 8. To be done.

On the other hand, in the fourth embodiment shown in FIG. 32, the roller-shaped electrode 3-B is used instead of the above-mentioned roller-shaped electrode 3-B instead of the charge applying means in which the electrode portions 3c and the non-electrode portions 3d are alternately arranged. It is composed of the toothed electrode plate 3-C, and the same operation as that of the third embodiment can be obtained.

In each of the third and fourth embodiments, since the roller electrode 3-B and the electrode plate 3-C are both made of a conductive material, a part of the base material is The non-electrode portion 3d is formed by the notch. However, for example, by electrically connecting and arranging a large number of conductive portions as the electrode portion 3c on the surface of an insulating roller made of resin, ceramics, or the like, The charge applying means may be formed.

As described above, in each of the third and fourth embodiments, the roller-shaped electrode 3-is used for the conveyor belt 8.
Since B and the electrode plate 3-C are simply arranged to face each other, a mechanism for rotationally driving is not required, and the cost and size can be reduced.

By the way, in the stripe-shaped charge pattern thus formed, the charge wraps around from the edge of the electrode portion 3c, so that the width of the charged region tends to be wider than the width of the non-charged region. The electric field at the boundary is likely to be weakened.

Therefore, in these embodiments, the roller-shaped electrode 3- is formed so that the width of the charged area and the width of the non-charged area of the charge pattern formed on the conveyor belt 8 are substantially equal.
The width of B and the electrode portion 3c of the electrode plate 3-C is formed larger than the width of the non-electrode portion 3d in advance.

Therefore, according to these third and fourth embodiments, the boundary between the charged area and the non-charged area of the charge pattern becomes clear, and the electric field strength at this boundary portion can be increased, so that the electrode thereof can be increased. By making the arrangement pitch of the portions 3c and the non-electrode portions 3d dense and increasing the edge effect thereof, the suction force of the pages of the book document to the transport belt 8 can be increased.

Further, as another means for generating an unequal electric field in the vicinity of the surface of the conveyor belt 8, FIG.
As shown in FIG. 3, a DC voltage may be applied to the bias roller 3-D while the switch 320a repeatedly turns on / off the applied voltage of the high-voltage power supply 320, which is a DC power supply.

As described above, the means for generating the unequal electric field is not limited to the AC voltage, but an alternating voltage having a rectangular shape, a triangular shape, a saw shape or the like, or a DC component of the AC alternating voltage. May be superposed and biased to either positive or negative.

As described above, according to the page-turning method of this embodiment, the paper (book original 92) to be attracted to the turning-conveying belt 8 does not require any work. Since they do not attract each other, it is possible to prevent the occurrence of page turning mistakes in the book document 92 due to the occurrence of irregularities (misalignment) at the edges of the sheets.

Further, according to this page turning method, since the portion where the suction force is generated is near the surface of the turning conveyor belt 8, the paper which is in contact with the surface of the turning conveyor belt 8. That is, the page turning of the book original 92 is performed, but for the top original,
Sufficiently large conveyance force and suction force act, but for the second and lower originals located below this original,
These transporting force and suction force hardly act.

Therefore, according to this page turning method,
Since it is possible to surely perform the page turning of only one sheet, this method is the most suitable method as the page turning method of the book document 92.

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

FIG. 34 is an electrical block diagram of the MFDS, FIG.
5 is an operation mode transition diagram at the time of reading a book document, FIG.
Is a transition diagram when reading a sheet original, and FIG. 37 is an MF.
It is a flowchart which shows the operation mode of DS.

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

In FIG. 34, the main control board 310
Controls the commands and data between each board, controls the ON / OFF timing of each load, abnormal processing by each sensor input, and mode switching to control the entire MFDS.

Further, the main control board 310 is constructed so as to set a communication protocol by communicating with the connected devices and individually correspond to each connected device.

For example, when the printer 300 is connected as its output device, its pixel density, processing speed, whether double-sided printing is possible, whether rear surface ejection is possible, etc. are checked and the corresponding mode selection area is selected. It is configured to make decisions.

Furthermore, this main control board 310 is
Two interfaces to external devices are provided for each mode.

In the main control board 310 of this embodiment,
The commands between each board are transmitted by serial communication, separated from the data / control line, and the command transmission / reception is possible even during the data output.

Here, in order to enhance the versatility, either one or both of GPIB, Centronics, SCSI, etc. are set as the interface so that the interface can be set through a general-purpose printer or a personal computer. It can be stored in the display and the storage device such as the optical disc device, the HDD, and the FDD without using a special interface.

On the other hand, in FIG. 34, the turning conveyance belt drive control board 311 controls the turning conveyance belt drive motor 61.

The turning unit drive control board 31
2 controls the turning unit drive motor 60.

[0322] Here, the turning and conveying belt drive motor 61
Detects the speed of the turning conveyor belt 8 by feedback of an encoder pulse generated by an encoder integrally mounted on the turning conveyor belt drive motor 61, and performs speed position control and forward / reverse operation.

On the other hand, the turning unit drive motor 6
0 is an encoder 1 attached to the turning roller 2
The position of the turning roller 2 is detected by the feedback of the encoder pulse generated by 52, and the speed position control and the forward / reverse operation are performed.

Further, the turning conveyance belt drive control board 311 and the turning unit drive control board 3
Reference numerals 12 are respectively connected to the main control board 310, and commands are transmitted / received to / from the main control board 310 by serial communication.

The operation display board 313 displays the number of prints,
Each key input for setting the scaling ratio, the number of pages to be turned, each mode, etc., a display for these key inputs, an error display, a page turning state display, and a document setting method for each mode are displayed.

Here, in the mode display, only a mode that is possible depending on the capability of the connected device (printer 300) is displayed, or an error is displayed when an impossible mode is selected.

For example, even though a printer that cannot perform double-sided printing is connected, the double-sided mode selection key 61
When the key of 2 is input, an error message such as "The connected printer cannot be printed on both sides" is displayed.

The reading of the original document is started by the key input of the start key 600 on the operation display board 313.

Further, the operation display board 313 and the main control board 310 exchange commands or data by serial communication.

The first image processing board 314 is a Si same-magnification sensor 3 incorporated in the first reading sensor unit 9.
15 (hereinafter referred to as the first CCD 315) has a function of generating a drive clock, and also turns on / off the first LED 316 built in the first reading sensor unit 9.
It has a function of setting an OFF timing and a function of amplifying an output of the first CCD 315 and A / D converting the output to perform image processing.

Further, the first image processing board 314 performs image processing such as shading correction, MTF correction, main scanning magnification, character processing, photographic processing, and negative / positive inversion.

The first image processing board 314 is connected to the main control board 310, and sends and receives data and commands to and from the main control board 310.

The second image processing board 317 is the above-mentioned first image processing board 317.
Similar to the image processing board 314, the function of generating the drive clock of the second CCD 318 incorporated in the second reading sensor unit 14 (which has the same configuration as the first reading sensor unit 9) and the second reading sensor similarly. The second LED 319 built in the unit 14
2nd CCD3 with the function to take ON / OFF timing of
It has a function of amplifying the output of 18 and A / D converting this output to perform image processing.

Further, in the second image processing board 317, similarly to the first image processing board 314, images such as shading correction, MTF correction, main scanning scaling, character processing, photographic processing, and negative / positive inversion are formed. Processing is performed.

Furthermore, this second image processing board 317
Is connected to the main control board 310 and transmits and receives data and commands to and from the main control board 310.

The first high voltage power source 320 is, as described above,
It is a power supply that applies a high-voltage AC voltage to the first bias roller 3, and is configured to be able to generate two different frequencies for attracting a document and for eliminating the belt. This is performed by switching signals from the two output ports.

The second high-voltage power supply 321 is a power supply for applying a high-voltage AC voltage to the second bias roller 11, like the first high-voltage power supply 320. It is configured to generate frequencies, and switching of each frequency is performed by switching signals from two output ports of the main control board 310.

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

Also, various sensors 25, 26, 27, 2 connected to the respective input ports of the main control board 310.
8, 29, 30, 31, 32, 33, and 34 perform mode switching, timing detection, abnormality detection, and the like, as described in the above mechanism description, and the detection signals are respectively sent to the main control board 310. Is given to.

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 this MFDS is shown in FIG.
5 is a book document reading mode for performing an automatic page-turning reading operation of a book document, and the second operation mode is a sheet document reading for performing an automatic paper feed reading operation of a sheet document as shown in FIG. Mode.

The book original reading mode and the sheet original reading mode have subdivided modes.

That is, in the book original reading mode, as shown in FIG. 35, an automatic book size recognition mode for automatically recognizing the book size of the book original 92,
There is a book size key input mode in which a book size is designated by key input on the operation display board 313.

These automatic book size recognition modes,
In each of the book size key input modes, an automatic page-turning reading operation is performed on the book document 92 in the spread reading mode in which the book document 92 is set with the document surface facing upward.

Further, in this book original reading mode, as its reading method, the original images of the left and right two pages of the opened book original 92 are continuously read in association with the output device (particularly the printer). Using a two-page spread continuous reading mode that prints images for one page on one sheet of transfer paper and a printer that has a double-sided image forming function, two pages of left and right original images can be read by the two-page spread continuous reading mode. The two-page spread continuous reading mode, which is a two-sided spread mode in which the read images for the next two left and right pages of the opened book document 92 are continuously formed on the back surface of one printed transfer sheet, is opened. The book image 92 is read by separating the original images of both left and right pages of the book original 92 by dividing the original image by one page. Then, by the printer having the double-sided image forming function, the original images of the left and right pages next to the opened book original 92 are separated one by one on the back side of the transfer paper printed in the two-page spread one-page division reading mode. The double-sided spread page reading mode for double-page spread.

On the other hand, in the sheet original reading mode, as shown in FIG. 36, the sheet original 200 is automatically fed with the position of the first reading sensor unit 9 or the second reading sensor unit 14 fixed. The sheet original through mode in which the original image is read by the sheet through method while the sheet is discharged and moved, and the original placing surface 116.
A sheet original scan mode in which the first original reading sensor unit 9 of the page turning reading unit 1 is repeatedly reciprocally moved (scanned) in a state where the sheet original 200 is set (placed) on top, and a sheet original 200 is read. There is a sheet document manual opening / closing mode in which a document is manually set when the document cannot be set (or is not set) by the automatic document feeding function (ADF).

In the sheet original through mode, a single-sided reading mode in which an image of only one side of the sheet original 200 is read, and images of both sides of the sheet original 200 are read by the first reading sensor unit 9 and the second reading sensor unit 14. There is a double-sided reading mode that reads simultaneously.

Further, this double-sided reading mode is the first
The reading sensor unit 9 and the second reading sensor unit 14 are arranged at the same position facing each other, and the same position reading mode for reading a document image and the first reading sensor unit 9 and the second reading sensor unit 14 are provided. It has a different position reading mode in which it is arranged at different positions shifted from each other and the original image is read.

The operation modes of the MFDS have been described above. Next, switching between the individual modes will be described with reference to FIG.

In FIG. 37, when the main power source of the MFDS is turned on, the main control board 310 shown in FIG.
Turning conveyance belt drive control board 311, turning unit drive control board 312, operation display board 313, first
The image processing board 314 and the second image processing board 317 are
Each is reset and initial setting is performed.

After that, the connection of the connected device such as the printer 300 is checked, and the modes compatible with the connected device are displayed, while the number of prints, the scaling factor, the number of pages to be turned, and each mode are set. Accept key input. Further, during this period, the book document 92 or the sheet document 200 is set.

When the sheet original 200 is set on the sheet original tray 94, the sheet original sensor 25 is turned on. In addition, here, the operation display board 31
When the MFDS transport unit 19 is opened by the open key 620 of No. 3, and the book document 92 is set in the opened state in the central reference positioning unit 24 of the document placement surface 116, the book document sensor 27 Is turned on.

According to the ON / OFF state of the sheet document sensor 25 and the book document sensor 27, and the number of prints indicating the number of sheets of the sheet document 200 input by the ten keys 602 of the operation display board 313.
The reading mode of the original image is switched as shown in FIG. That is, here, the book document sensor 27 is turned off.
When the FF and the sheet document sensor 25 are ON and the number of prints is "1", the sheet document through mode is entered. Further, here, the book document sensor 27 is OF
F, the sheet document sensor 25 is ON, and when the number of prints is “2” or more, the mode shifts to the sheet document scan mode. Further, when both the book original sensor 27 and the sheet original sensor 25 are OFF, the sheet original manual opening / closing mode is entered. If the book original sensor 27 is ON and the sheet original sensor 25 is OFF, the book original reading mode is entered. Further, here, when both the book document sensor 27 and the sheet document sensor 25 are ON, the abnormality process 1 (warning buzzer ON and error display) is performed to call the user's attention. , Transition to book document reading mode.

In this way, if the start key 600 of the operation display board 313 is not pressed after entering the selected mode subroutines, the image reading operation is not executed and the process returns to the step of accepting the key input. To be done.

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 document reading mode, the scan cutoff sensor 34 is turned on.
/ OFF is checked. As shown in FIG. 4, the scan cutoff sensor 34 is turned on by detecting the upper limit detector 76 when the page turning reading unit 1 moves up to its upper limit position.

As described above, the page turning reading unit 1 has the book original 9 placed on the original placing surface 116.
It is moved up and down according to the thickness of 2. As the page-turning reading unit 1 rises, that is, as the thickness of the book document 92 increases, the page-turning conveyor belt 8 drives it.
Will increase the tension. Therefore, when the tension of the page-turning conveyor belt 8 becomes too high, that is, when the book original 92 is too thick and the page-turning reading unit 1 rises too much, this tension acts as a brake to scan the page-turning reading unit 1. Can not be. The scan cutoff sensor 34 detects such a level at which the page turning reading unit 1 cannot scan because the book document 92 is too thick. When the scan cutoff sensor 34 is ON, the abnormal process 2 (warning buzzer ON and error message "book original is too thick" is displayed), and the user forcibly closes the transport unit 19, The transport section 19 is prevented from being damaged.

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

At this time, if the transport unit 19 remains open, that is, if the transport unit lock sensor 31 remains off, the abnormality processing 3 (alarm buzzer ON and "close transport unit" display) Is done. And this transport unit 1
When 9 is closed, the book size upper limit sensor 33 is turned on.
/ OFF is checked.

Here, the book size upper limit sensor 33 is
When the book size of the book document 92 is detected and turned on, that is, the book size of the book document 92 set on the document placing surface 116 exceeds the reading area of the page turning reading unit 1 and cannot be read. Error handling 4 (warning buzzer ON
"The size of the book document is too large" is displayed.

After that, after checking the presence or absence of key input of the number of prints, the scaling factor, and the number of pages to be turned, in the case of the automatic book size recognition mode, the prescan flag is set, and the automatic book size recognition mode is not set. In this case, the book size input mode is entered, and the operation display board 3
A reading area of the book document 92 is determined by setting a book size by inputting a predetermined key with the key 13.

When the start key 600 is pressed, the transport unit locking device 140 operates and the transport unit 19 is locked on the document table 18. As a result, during the page turning operation by the page turning reading unit 1, the user mistakenly opens the conveyance section 19 and the book document 9
A situation in which 2 is damaged is avoided.

Next, after the operation of the transport unit locking device 140, if the above-mentioned prescan flag is set, the prescan operation of the page turning reading unit 1 is executed. Here, if the prescan flag is not set, this prescan operation is skipped. After the prescan operation, the process waits until the connected device (printer 300) is ready.

Then, this connected device (printer 300)
When the reading start signal output from the connected device (printer 300) is received at the stage of preparation for the above, the page turning reading unit 1 is driven and the reading operation of the original image of the book original 92 is performed as described above. Be started. The reading operation by this page turning reading unit 1 is
The process is repeated as many times as the number of print units set in advance. When the reading operation of the predetermined number of times is completed, the page turning operation is performed by the page turning reading unit 1 as described above in order to perform the operation of reading the original image of the next page.

In this way, the reading operation of the original image of the book original 92 and the page turning operation are repeatedly executed until the final page is turned in accordance with the preset number of copies. Then, the page turning operation of the preset final turning page is completed,
Further, when the reading operation for the final read page is completed a predetermined number of times, the page turning reading unit 1 does not perform the page turning operation of the final reading page,
After returning to the home position 1-A, the book document reading mode routine is returned.

The basic operation of the book original reading mode is as follows.
As described above with reference to the flowchart shown in FIG. 38, the two-page spread continuous reading mode, the two-sided mode, and the one-page spread reading mode and the two-sided mode described above in this mode are as shown in FIG. The input mode accepted when the key input is set is entered. Each of these input modes will be described with reference to a timing chart showing the progress after the start key 600 is pressed.

First, the spread two-page continuous reading mode will be described with reference to the timing chart shown in FIG.

In FIG. 39, when the start key 600 of the operation display board 313 is pressed and the reading start switch SW is turned on, the shutter (not shown) in the first reading sensor unit 9 is closed. The inner surface of this shutter serves as a white reference plate, by which the shading correction of the first reading sensor unit 9 is performed. The 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 page turning reading unit 1 is started by a forward rotation start signal sent from the main control board 310 to the turning unit drive control board 312. By this forward rotation start signal, the page turning reading unit 1 starts the prescan.

Here, after the moving speed of the page turning reading unit 1 rises to the constant speed Vf, the above-mentioned shutter is already opened, and the reading of the original image of the book original 92 is started by the first CCD 315. There is.
By this pre-scanning reading by the page turning reading unit 1, the edge of the book original 92 that has been opened is detected by image processing, and the output of the encoder 152 attached to the turning roller 2 at this time is counted. , The book original 9 set on the original placing surface 116
The book size of 2 is recognized, and the reading area of the original image of the page turning reading unit 1 and the page turning area are determined.

As described above, in this MFDS, since the book original 92 is set with the center of the original placing surface 116 as a reference, only the left end portion of the set book original 92 is detected. Thus, the reading area of the original image of the page turning reading unit 1 and the page turning area can be calculated.
Therefore, in this MFDS, when detecting the book size of the book original 92, it is not necessary to prescan the page turning reading unit 1 over the entire surface, and the page turning reading unit 1 is placed on the original placement surface 116 only by performing a short prescan. The book size of the placed book original 92 can be detected. As a result, during the prescan of the page turning reading unit 1, the book document 92
No more accidentally turning over the reading start page.

Book size data of the book document 92 is transmitted from the main control board 310 to the printer 300 as an externally connected device.

On the other hand, while the book size detection is completed and the book size data is being transmitted to the printer 300, the main control board 310 drives the turning unit drive motor 60 to the turning unit drive control board 312. A reverse rotation signal for reverse rotation is applied, and the page turning reading unit 1 is moved back to the home position 1-A at the speed Vr.

By coloring the document mounting surface 116 of the document table 18 of this MFDS with a chromatic color, for example, a chromatic color such as yellow, which is not often used as a book document, Since the area identification accuracy between the original placement surface 116 and the reading area of the original image of the book original 92 can be increased, the book size can be detected more accurately during the above-described prescan, and the book can be detected. The reliability of size data is improved.

If the document placing surface 116 is colored with an intermediate color such as gray, the first CCD 315 of the first reading sensor unit 9 does not use a color sensor and is used for prescanning. Area can be identified. After the above-described prescan is completed and the page turning reading unit 1 is retracted to the home position position 1-A, the printer 300 is ready and the printer 300 requests the main control board 310 to transfer data. When the transfer request signal is given, the main control board 310 gives a forward rotation signal for rotating the turning unit drive motor 60 to the turning unit drive control board 312, whereby the forward turning of the page turning reading unit 1 is performed. The rolling motion is started. As described above, the page turning reading unit 1 feeds back the output of the encoder 152 of the turning roller 2,
Along the document surface of the book document 92, constant speed control is performed at a speed of Vf, and the book document 92 is moved toward the end position 1-C.

At this time, the first reading sensor unit 9
The LED 316 has already been turned on, and the first CCD 315 of the first reading sensor unit 9 has started reading the document information of the book document 92. Here, as shown in FIG. 1, in the vicinity of the binding portion (center portion) of the book original 92 that is opened and set on the original placing surface 116, the warp of the original surface is so tight that the vicinity of this binding portion is close. It becomes difficult to read the document information accurately. In addition, document information such as characters and images is not usually formed near the binding portion of the book document 92.

Therefore, in this MFDS, as shown in FIG. 39, the reading SFGATE of the first CCD 315 is turned off near the binding portion of the book original 92,
Reading of the document information near the binding portion is masked.

The mask area at the time of initial setting of the original information is set to be +10 mm and -10 mm from the center of the central reference positioning portion 24 as described above. 313
The set value can be changed by the key input of the book binding portion mask area setting key 608, and it is possible to deal with a book original having a special binding.

By the way, the first reading sensor unit 9
When the document information of the book document 92 is read by the page turning reading unit 1, the end position position 1-
The process is performed up to C, but when the page turning reading unit 1 reaches the vicinity of the center of the book document 92, the first high-voltage power supply 320 is turned on at the frequency f1.

As a result, the above-mentioned charge pattern is formed on the portion of the turning conveyance belt 8 that abuts the right page of the book document 92.

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

In this way, when the page turning reading unit 1 is driven to the end position 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 first high voltage power source is supplied. When the output of 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 preset last read page of the book document 92, the main control board 310 outputs a turning signal. First, the page-turning reading unit 1 uses the book original 92.
After the last read page is read, the page is returned and moved without performing the above-described page turning operation, and is retracted to the home position position 1-A.

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

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

During the page turning operation of the page turning reading unit 1, the first high-voltage power supply 320 is turned on at the frequency f2 in order to eliminate the charge pattern in the original attraction area of the page turning conveyance belt 8.

In this way, the book original 9 turned into the page storage portion 7 of the page turning reading unit 1
The reading-finished page of No. 2 is discharged from the page storage unit 7 while the page turning reading unit 1 reaches the end position 1-C after the page turning reading unit 1 passes over the center of the book original 92 and turns the page. The 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 original, that is, Vrm> Vf. The operation speed is increased.

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

That is, this MFDS is the page turning sensor 2 at each position of the page turning reading unit 1.
The presence / absence of an abnormality is detected by checking ON / OFF of 9, and if 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 turning is impossible", the page storage section 7 is turned over. If the original pages cannot be ejected, a message such as "Pages cannot be stacked" will appear.
This is displayed on the operation display board 313, and the page turning operation is stopped.

Further, in order to allow the user to confirm the page-turning state where this abnormality has occurred, the location where the page-turning state abnormality has occurred is displayed on the operation display board 313.
Is displayed in.

Hereinafter, the reading and page turning operations of the second and subsequent pages of the book original 92 are sequentially started by the transfer request signal from the printer 300, and the same reading operation and page turning as described above are performed. The operation is repeatedly executed until the final read page set in advance is reached.

Here, in the timing chart of FIG. 39, when the number of prints of the original is set to "1", that is, each read page of the book original 92 is set to 1
The case where the page-turning operation for the pages that have been read is executed every time the reading is performed has been described, but if the number of prints of this document is set to "2" or more, the first
At the time when the first original reading operation by the reading sensor unit 9 is completed, a reverse rotation signal is transmitted from the main control board 310 to the turning unit drive control board 312 instead of the turning signal, and the page turning reading unit 1 operates. At the speed of the speed Vr, return is made toward the home position 1-A, and at the same time when the return operation is completed, the second original reading operation of the page turning reading unit 1 is started.

Then, the document reading operation of the page turning reading unit 1 as described above is repeatedly executed by the preset number of print sets of the document, and when the number of this operation and the number of print sets match. Then, for the first time, a turning signal is transmitted from the main control board 310 to the turning unit drive control board 312, and the page turning operation described above is executed.

Hereinafter, the reading of the original image of the second and subsequent pages of the book original 92 and the page turning operation are sequentially started by the transfer request signal from the printer 300, and the number of times corresponding to the same number of printing units as the above is performed. The reading operation and the page turning operation are repeatedly executed until the final read page set in advance is reached.

If the print scaling key 614 is set to scale the read original image, the scan speed Vf of the first reading sensor unit 9 is set to the scaling ratio. By varying the speed according to the speed, the original image is scaled in the sub-scanning direction, and the first image processing board 314 performs the scaling process in the main scanning direction on the original image.

On the other hand, in the double-sided two-page spread continuous reading mode as described above, the printer 30
Since 0 performs double-sided printing of the original image, the transmission timing of the transfer request signal from the printer 300 to the main control board 310 is slightly delayed, but other operations are the same as the above-described two-page spread spread. The same operation as the reading mode is executed.

Next, with reference to FIG. 40, the spread one page break reading mode will be described.

The double-page spread one-page break reading mode is a mode in which the left page and the right page of the book document 92 that has been opened are separately read to form an image, and these images are printed on different transfer papers. Mode to
There is a mode of printing on the front and back of one sheet of transfer paper (double-sided mode of this two-page spread page-reading mode).

In this mode, either one of the operation of reading from the left page of the book document 92 and the operation of reading from the right page is performed on the operation display board 3.
The reading start page selection key 603 can be selected and set.

FIG. 40 shows a timing chart when the reading is started from the left page toward the book document 92.

The operation in the double-page spread single page break reading mode is substantially the same as the operation in the double-sided mode of the double-page spread two-page continuous reading mode described above. The transfer request signal from the printer 300 to the main control board 310 is transmitted page by page, which allows the page turning reading unit 1 to move from the left page to the right page of the book document 92. It is moved (scanned) at high speed.

FIG. 41 shows a timing chart in the case of setting such that reading is started from the right page of the book document 92 in the double-page spread reading mode.

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

[0407] Also, in this spread one page break reading mode, the read skip page setting key 61
When a page to be skipped (skip) without scanning is set by 8, the page turning reading unit 1 for the reading skip page is
It is programmed to move at a speed higher than the scan speed Vf of the first reading sensor unit 9 at the time of reading, and immediately execute the reading skip page turning operation (a timing chart is not shown). ).

By the way, generally, FIG. 40 and FIG.
As shown in FIG. 5, few printers can continuously request the transfer request signal from the printer 300 to the main control board 310 in the normal state.

[0409] Therefore, in the case of implementing the double-page spread page break reading mode by using such a general printer, two transfer sheets are fed so as to overlap in the printer side. It can be realized by

If it is necessary to provide a certain distance between the two transfer sheets due to the resist relationship between the transfer sheet and the photosensitive drum, the book original 92 is used. The image data on the left side of the page is sent to the printer as it is, and the image data on the right page of the book document 92 is delayed through the delay memory for the time corresponding to the distance between these transfer sheets. Can be realized by.

A block diagram of an example of the latter case is shown in FIG.
2 and the timing chart thereof are shown in FIG.
In this example, the internal gates A and B on the main control board 310 delay the image data output to the printer through the delay memory by the time Td with respect to the image data directly output to the printer through the switch. It is configured to be.

Next, the double-sided mode in the double-page spread single page break reading mode will be described. First, a case where the image data of the left and right two pages of the opened book document 92 are printed on the front and back sides of one transfer sheet will be described.

In this case, since it is necessary to reversely convey the transfer paper on the printer 300 side, after the printing of the image data of the left page is completed and before the printing of the image data of the right page is started, It will take some time. Therefore, in this mode, when the page turning reading unit 1 finishes reading the left page of the book original 92 and reaches the vicinity of the binding portion, the driving of the page turning reading unit 1 is temporarily stopped.

Then, the printing of the left page image on the printer 300 side and the reverse conveyance of the transfer sheet are completed,
When a transfer request signal is issued from the printer 300 to the main control board 310, the stopped page turning reading unit 1 is driven again at a predetermined scan speed Vf,
The right page of the book document 92 is read, and the image data of this right page is transferred to the printer 300.
On the back side of the transfer paper with the left page image printed on the front side,
This right page image is printed and double-sided printing is performed. FIG. 44 shows a timing chart at this time.

Next, in the double-page spread page-reading mode, a double-sided mode for forming an image by matching the front and back sides of the printed transfer sheet with the front and back sides of the document surface of the book document 92 will be described. . In this mode, when reading is started from the left page of the book document 92, as described above, the printer 300 is instructed to continuously feed two sheets, and the left page image is printed and transferred. While the paper is discharged as it is, the transfer paper on which the right page image is printed is reversely conveyed, and preparations are made for printing the left page image of the next page of the book document 92 on the back surface thereof.

During this time, on the MFDS side, the page turning operation of the manuscript pages that have been read is performed.

When the page turning operation on the MFDS side is completed, the reading operation for the next page is executed, and the left side read on the back side of the transfer sheet that has been previously printed with the right page image and reversed and conveyed. The page image is printed and ejected. The right page image read at this time is printed on a newly fed transfer sheet.
This transfer paper is reversely conveyed like the previous transfer paper,
Preparations are made for printing the left page image of the next page of the book document 92 on the back side thereof.

By repeating such a series of operations, a transfer sheet on which an original image having a page configuration exactly the same as that of book original 92 is printed can be obtained. The above is an example of the operation in the book document reading mode.

Here, the setting of the book original in the spread reading mode will be described.

In the connected device check of FIG. 34, if the printer 300 is capable of discharging the back side, the following display is made. In other words, if the book original is written horizontally (open left), open the first page you want to read and set it face up. If it is written vertically (open right), open the first page you want to read. Please set it upside down. ”Instructing each setting method for horizontal writing and vertical writing of the book manuscript.

On the other hand, in the connected device check of FIG. 34, when the printer 300 is capable of only front surface discharge, the following display is made. In other words, if the book document is written horizontally (open left), open the last page you want to read and set it upside down. If it is written vertically (open right), open the last page you want to read. And set it so that it is facing upwards. ”For each of the horizontal and vertical directions of the book manuscript.

In this MFDS, by setting the book original 92 according to the above-described instruction, the pages of the transfer paper to be ejected can be aligned regardless of the function of the printer 300 connected thereto. In addition, as for the method of inputting the number of pages to be turned in this MFDS,
There are two input methods by key input on the operation display board 313, and the user can select any one of these input methods according to his / her preference. One of the input methods is to set the total number of pages to be read using the read total page setting key 606 or the like, and the other input method is to set the read start page setting key 6
04, a method of inputting the first page to be read and the last page by using the read last page setting key 605 and the like. The number of pages to be turned in this MFDS may be input by any of the above methods as long as the number of pages to be turned by the page turning reading unit 1 can be accurately calculated.

The method of calculating the number of page turns in each of the above methods will be described below.

First, the case where the total number of pages to be read is input will be described. Here, if the total number of pages to be read is X and the number of pages to be turned is M, (X-2) / 2 = M + remainder when reading from the left page ... X-1) / 2 = M + remainder, and the number of times of turning can be obtained by calculating the value of M from these equations.

Next, the case where the first page to be read and the last page are input will be described. Here, if 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.
By substituting this equation into the above equation, the equation M can be calculated.

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

The image reading mode for the book original is as described above, and the image reading mode for the sheet original in this MFDS will be described below. As shown in FIG. 36, the sheet document reading modes include a sheet document through mode, a sheet document scanning mode, and a sheet document manual opening / closing mode.

First, the sheet original through mode will be described.

The sheet original through mode includes a single-sided original reading mode and a double-sided original reading mode. The double-sided original reading mode includes a same-position reading mode and another-position reading mode.

Selection of these modes is performed as shown in FIG. First, in the single-sided original reading mode, as shown in FIGS. 46 and 47, the sheet original tray 9
4, the sheet original 200 is set downward, and when the start key 600 is pressed in this state, first, the power source of the turning conveyance belt drive motor 61 is turned on, the drive roller 12 is rotated, and the turning conveyance belt 8 is rotated. 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 second paper feed pulley 130 attached to the first belt support roller 97 passes the paper feed drive belt 127. The paper feed roller 96 is rotated, and the sheet original 200 is conveyed toward the paper feed separation pad 95.

The sheet feeding / separating pad 95 separates only the lowest sheet original 200 from other sheet originals, and the first conveying guide 108 and the second conveying guide 10 are separated.
While being guided by 9, the sheet is conveyed to a position in contact with the turning conveyance belt 8. Here, a paper feed sensor 26 is attached to the second conveyance guide 109. After the paper feed sensor 26 detects the trailing edge of the sheet original 200, the paper feed clutch 128 is turned off. As described above, the conveyance timing of the sheet document 200 is set.

On the other hand, during this period, the AC power source 35 is applied to the second bias roller 11 as the turning conveyor belt 8 rotates.
AC high voltage is applied to form a striped charge pattern on the turning and conveying belt 8. As a result, the fed sheet original 200 is attracted and conveyed by the turning conveyance belt 8. The linear velocity of the turning and conveying belt 8 at this time is 360 mm / s at the same magnification.
In addition, when the magnification is changed, the magnification is changed according to the set magnification.

On the other hand, in this mode, the page turning reading unit 1 is located at the end position 1-C, and the first reading sensor unit 9 moves the sheet original 2 conveyed by the turning conveying belt 8.
00 original information is sequentially read (pixel density is 400
dpi). Then, the sheet document 2 that has been read
00 is the third conveyance guide 110 and the fourth opposing roller 10.
3, the fifth counter roller 104, the sixth counter roller 105, and the seventh counter roller 106 are nipped and conveyed, and the paper exit 1
Paper is discharged from 17 onto the paper discharge tray 23. This paper exit 1
In the third conveyance guide 110 near 17
8 is attached, and the sheet original 20 to be discharged
A paper discharge jam of 0 has been detected.

When the reading operation of the first sheet original 200 is completed, the sheet feeding clutch 128 is turned on again at a predetermined sheet feeding timing to feed the second sheet original 200. Then, the reading operation similar to the above is executed. In this way, the sheet document tray 94
The sheet originals 200 set in the above are sequentially fed and read, the last (topmost) sheet original 200 is fed, and the sheet original sensor 25 is turned off. It is switched to voltage and the charge pattern on the turning and conveying belt 8 is neutralized,
After the final sheet document 200 is discharged, the MFDS
All operations of are stopped.

The above-described reading operation is an operation when a printer having a back surface paper discharge function is connected to this MFDS, whereby page alignment discharge of the sheet original 200 and the printed transfer paper is realized. It here,
If the printer connected to this MFDS has only the front surface discharge function, the sheet original 200 is set upward on the sheet original tray 94, and the second reading sensor unit 14 is used to set the sheet original 200. 20
By reading 0, the page original discharge of the sheet original 200 and the printed transfer paper is realized as in the case of the printer having the back surface discharge function described above. Further, other operations when the printer having the front surface paper discharging function is connected are the same as those when the printer having the back surface paper discharging function is connected.

Next, the double-sided original reading mode in the sheet original through mode will be described.

In this double-sided original reading mode, a horizontally written sheet original is set on the sheet original tray 94 with the leading edge of the original facing downward. This is because the first reading sensor unit 9 and the second reading sensor unit 14 do not have a memory, so 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 original reading mode is the same as that in the single-sided original reading mode as shown in FIGS. 48 and 49, but in this mode, page turning is performed. When the reading unit 1 is located at its home position 1-A and the document table 18 is at the same position as the second reading sensor unit 14, the reading of document information on both the front and back sides of the sheet document 200 is performed. The first read sensor unit 9 and the second read sensor unit 14 are simultaneously executed in parallel.

On the other hand, the basic operation of the different position reading mode in the double-sided original reading mode is as shown in FIG.
As shown in FIG. 51, this is similar to the case of the single-sided original reading mode, but in this mode, the page turning reading unit 1 is located at the end position position 1-C. As is apparent from this, in this different position reading mode, the distance between the reading positions of the first reading sensor unit 9 and the second reading sensor unit 14 becomes larger than the length of the maximum size document, and therefore, these Document information on both the front and back sides of the sheet document 200 read by the first reading sensor unit 9 and the second reading sensor unit 14 is output in time series.

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

In the sheet scan mode, as shown in FIG.
Also, as shown in FIG.
The sheet original 200 is set upward, and in this state,
When the start key 600 is pressed, first, the power supply of the turning and conveying belt drive motor 61 is turned on, and the drive roller 12 is driven.
Is rotated, and the turning conveyance 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 second paper feed pulley 13 attached to the first belt support roller 97.
0 to the paper feeding roller 96 via the paper feeding drive belt 127.
Is rotated, and the sheet original 200 is conveyed toward the paper feed separation pad 95.

The sheet feeding / separating pad 95 separates only the lowest one sheet original 200 from other sheet originals, and the first conveying guide 108 and the second conveying guide 10 are separated.
While being guided by 9, the sheet is conveyed to a position in contact with the turning conveyance belt 8.

Here, in the second transport guide 109,
The paper feed sensor 26 is attached, and the paper feed sensor 2
6, the conveyance timing of the sheet original 200 is set so that the sheet feeding clutch 128 is turned off after the trailing edge of the sheet original 200 is detected.

On the other hand, during this period, as the flipping conveyor belt 8 rotates, the AC power source 35 is applied to the second bias roller 11.
AC high voltage is applied to form a striped charge pattern on the turning and conveying belt 8.

As a result, the fed sheet original 200 is attracted and conveyed by the turning and conveying belt 8.

The linear velocity of the turning conveyor belt 8 at this time is
It is set to 360 mm / s, and when the leading edge of the sheet document 200 reaches the home position position 1-A,
The turning of the flipping conveyor belt 8 is stopped.

On the other hand, in this mode, the page turning reading unit 1 is located at the home position position 1-A thereof, and after the turning of the turning belt 8 is stopped, the page turning reading unit 1 is turned over. By the drive motor 60, the end position position 1-C
The original information of the sheet original 200 conveyed by the turning and conveying belt 8 is sequentially read by the first reading sensor unit 9 while being moved toward (the pixel density is 400 dpi). 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 turning conveyance belt 8 is removed. This allows
The sheet original 200 is prevented from entering the page turning reading unit 1 when the page turning reading unit 1 is returned.

The page turning reading unit 1 which has finished reading the sheet original 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 is retracted upward from the document surface of the sheet document 200, and
A high-voltage AC voltage is applied to the first bias roller 3 from the first high-voltage power supply 320, and a striped charge pattern is formed on the turning conveyance belt 8, and the sheet original 200 is formed.
The peeling conveyance belt 8 is adsorbed and fixed on the conveyance belt 8. Then, after the above-described operation is repeated for the set number of times, the turning conveyance belt drive motor 61 is turned on, the turning conveyance belt 8 is rotated, and the sheet original 200 that has finished this reading is ejected from the sheet ejection port. The paper is discharged from 117 to the paper discharge tray 23. A paper discharge sensor 28 is attached to the third conveyance guide 110 near the paper discharge port 117, and a 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 paper feed timing,
The paper feed clutch 128 is turned on again, the second sheet document 200 is fed, and the same reading operation as described above is executed.

In this manner, the sheet originals 200 set on the sheet original tray 94 are sequentially fed and read, the last (topmost) sheet original 200 is fed, and the sheet original sensor 25 is turned off. Then, the power supply of the second bias roller 11 is switched to the high-frequency AC voltage of the second high-voltage power supply 321, the charge pattern of the turning conveyance belt 8 is removed, and the final sheet original 200 is discharged, and then the MFDS All operations are stopped.

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

The operation of this sheet original manual opening / closing mode is as follows.
As shown in FIGS. 54 and 55, in the operation of the sheet document scan mode described above, the sheet conveying unit and the respective power sources for sheet suction are turned off, and the operator manually operates the sheet document scanning operation. The replacement is done.

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

FIG. 56 shows an operation control circuit of the page turning reading unit 1 in this MFDS. This operation control circuit controls the reciprocating drive of the page turning reading unit 1 and its speed control, and is incorporated in the turning unit drive control board 312.

In FIG. 56, the microcomputer 5
20 (hereinafter, simply referred to as a microcomputer) also performs this MFDS mode control and sequence control (details not shown). As such a microcomputer 520, for example, a programmable interval timer 521 (hereinafter, simply referred to as a timer) based on μPD71054G is connected. The timer 521 is for sending a pulse width modulation 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), which is controlled with a resolution of 400 bits. This timer 521 has an 8 MHz oscillator 5
22 is connected and is configured to be supplied with a clock signal.

Also, the turning unit drive motor 60 is
Driving transistors Q1 to Q4 for the microcomputer 520
Connected through. That is, the transistor Q
1, Q4 is ON, and the transistors Q2, Q3 are OFF, the turning unit drive motor 60 is supplied with a current rotating clockwise (CW), and the transistor Q2 is turned on.
When Q2 and Q3 are ON and the transistors Q1 and Q4 are OFF, the turning unit drive motor 60 is supplied with a current that rotates counterclockwise (CCW).

Here, the turning unit drive motor 60
However, when it rotates in the clockwise direction (CW), the page turning reading unit 1 is moved forward, and the page turning unit drive motor 60
However, when turned counterclockwise (CCW), the page turning reading unit 1 is set to return. 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.

Further, the turning roller 2 is directly connected to an encoder 152 for generating a pulse in accordance with the rotation thereof.

Here, the encoder 152 generates two pulse signals having different phases according to the rotation amount and the rotation direction of the turning unit drive motor 60. One is the A-phase encoder pulse ENCA, and the other is the B-phase encoder pulse ENCB.

The A-phase encoder pulse ENCA is input to the counter input terminal C1 of the microcomputer 520 via the frequency division multiplexer 524. This allows
In the microcomputer 520, the pulse interval of the A-phase encoder pulse ENCA 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, and the value of the measurement data of the pulse interval of the A-phase encoder pulse ENCA is read during the processing of the interrupt program, and based on this data. Then, the rotation speed of the turning unit drive motor 60 is calculated, the motor control amount is calculated by the proportional / integral control calculation, and
Output (data loading to the timer 521) and the like are performed.
Specifically, the output of the A-phase encoder pulse ENCA is set by the frequency division multiplexer 524 according to the target speed to
By dividing the frequency by 2, 4, or 8, the interrupt input signal is given to the counter input terminal C1.

Here, when the frequency is divided by 1, the first reading sensor unit 9 moves 0.116 mm by one pulse of the encoder 152, and the speed thereof is calculated inside the microcomputer 520 by the interrupt interval. Then, the output timer value is determined by the proportional / integral calculation process based on the calculated speed data.

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 the phase difference between the two, and their positions are detected. The rotation direction of the turning unit drive motor 60 is determined by the phase difference. That is, when the A-phase encoder pulse ENCA rises, the state of the B-phase encoder pulse ENCB is input to the port of the microcomputer 520 to determine the rotation direction of the turning unit drive motor 60.

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

Speed control of the turning unit drive motor 60 is performed by PWM control. First, when the page turning reading unit 1 scans the scanner, that is, when the turning motor 60 rotates clockwise, the transistor Q1 is turned on, while the PWM output from the timer 521 causes the transistor Q4 to pass through the gate 527. Is turned on / off to generate a potential difference between both terminals of the turning unit drive motor 60, and the turning unit drive motor 60 is rotated at a speed according to the duty ratio of the PWM signal.

On the other hand, when the page-turning reading unit 1 returns, the transistor Q3 is turned off, contrary to the above case.
In addition, the PWM output from the timer 521 causes the transistor Q2 to turn on through the gate circuit 528.
The turning unit drive motor 60 is turned N / OFF to generate an opposite potential difference between both terminals of the turning unit drive motor 60, and the turning unit drive motor 60 is rotated at a speed corresponding to the duty ratio of the PWM signal.

[0468]

According to the present invention, when the page turning means and the document reading means are started, the upper part of the main body of the apparatus remains open, or the placed book original is too thick, and the apparatus is too thick. If the upper part of the main body remains incompletely closed, the page-turning scanning of the book original can be prohibited, the page-turning scanning is stabilized, and the page of the book original is damaged. It can be prevented. Further, according to the present invention, as described above, when the page turning reading scanning of the book original is started in the state where the upper part of the apparatus main body is left open, the warning display can be issued. It is possible to improve the operability at the time of reading an original by not only preventing the damage of the document, but also eliminating the waste of time and the risk due to the erroneous operation of the operator.

[Brief description of drawings]

FIG. 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.

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

FIG. 4 is a perspective view of an end portion of a page turning reading unit in the MFDS.

FIG. 5 is a cross-sectional view of a roller end portion showing a supporting structure of a roller that constitutes the page turning reading unit.

FIG. 6 is a side view showing an unlocking state of the transport unit locking device in the MFDS.

FIG. 7 is a side view showing a lock start operation mode of the transport unit locking device.

FIG. 8 is a side view showing a lock completion state of the transport unit locking device.

FIG. 9 is a perspective view showing an appearance of a printer equipped with the MFDS.

FIG. 10 is a perspective view showing an external appearance of the printer in which the MFDS is mounted when the transport unit is opened.

FIG. 11 is a perspective view of the vicinity of an end portion of a first reading sensor unit arranged in the page turning reading unit.

FIG. 12 is a side view of the vicinity of an end portion of the first reading sensor unit.

FIG. 13 is a partial enlarged cross-sectional view showing a support structure of an end portion of the first reading sensor unit.

FIG. 14 is a side view of a rear side of a turning roller 2 of the page turning reading unit.

FIG. 15 is a cross-sectional view showing a structure of a central reference positioning portion on a document placement surface in the MFDS.

FIG. 16 is a plan view of an operation display board in the MFDS.

FIG. 17 is a schematic sectional view of the printer.

FIG. 18 is a plan view of a writing unit of the printer.

FIG. 19 is an operation mode diagram of a switching claw that switches a transfer sheet conveyance path of the printer.

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 sectional view showing an operation mode of the MFDS.

FIG. 23 is an explanatory diagram of a turning conveyance belt in the MFDS.

FIG. 24 is a partial perspective view showing a page turning operation of the turning conveyance belt.

FIG. 25 is a diagram showing a pitch characteristic of a conveying force of the above-mentioned turning conveyor belt.

FIG. 26 is a diagram showing a pitch characteristic of the attraction force of the turning conveyance belt.

FIG. 27 is a diagram showing an applied voltage characteristic of a carrying force of the turning conveyor belt.

FIG. 28 is a diagram showing an applied voltage characteristic of the attraction force of the turning conveyance belt.

FIG. 29 is a partial perspective view of another means for imparting an unequal charge to the turning conveyance belt.

FIG. 30 is a partial perspective view of still another means for imparting an unequal charge to the turning conveyance belt.

FIG. 31 is a partial perspective view of still another means for imparting an unequal charge to the turning conveyance belt.

FIG. 32 is a partial perspective view of still another means for imparting an unequal charge to the turning conveyance belt.

FIG. 33 is a partial perspective view of still another means for imparting an unequal charge to the turning conveyance belt.

FIG. 34 is an electrical block diagram of the MFDS.

FIG. 35 is a mode transition diagram in the book document reading mode operation of the MFDS.

FIG. 36 is a mode transition diagram in the sheet document reading mode operation of the MFDS.

FIG. 37 is a flowchart showing the switching operation of each mode.

FIG. 38 is a flowchart showing the operation of the book document reading mode.

FIG. 39 is a spread 2 in the book original reading mode.
6 is a timing chart showing an operation in a continuous page reading mode.

FIG. 40: Spread 1 in book document reading mode
6 is a timing chart showing an operation in a page break reading mode.

FIG. 41 is a timing chart showing an operation in a case where the book document is set to be read from the right page in the double-page spread reading mode.

FIG. 42 is a block diagram of a circuit that delays the transfer timing of data read in the double-page spread one-page break reading mode.

FIG. 43 is a timing chart showing the operation of the circuit that delays the transfer timing of the data read in the two-page spread one-page break reading mode.

FIG. 44 is a timing chart showing an operation in double-sided mode in the double-page spread one-page break reading mode.

FIG. 45 is a flowchart showing a switching operation of the sheet original through mode in the sheet original reading mode.

FIG. 46 is a flowchart showing the operation of the single-sided reading mode in the sheet original through mode.

FIG. 47 is a timing chart showing an operation in the single-sided reading mode.

FIG. 48 is a flowchart showing an operation in the same position reading mode in the sheet original through mode.

FIG. 49 is a timing chart showing an operation in the same position reading mode.

FIG. 50 is a flowchart showing an operation in another position reading mode in the sheet original through mode.

FIG. 51 is a timing chart showing an operation in the another position reading mode.

FIG. 52 is a flowchart showing the operation of the sheet document scanning mode in the sheet document reading mode.

FIG. 53 is a timing chart showing an operation in the sheet original scan mode.

FIG. 54 is a flowchart showing the operation of the sheet document manual opening / closing mode in the sheet document reading mode.

FIG. 55 is a timing chart showing the operation of the sheet document manual opening / closing mode.

FIG. 56 is a scanning control circuit diagram of the page turning reading unit.

[Explanation of symbols]

A Multi-function document scanner (MFDS) 1 Page turning reading unit 1-A Home position 1-C End position 3 First bias roller 8 Turning conveyor belt 9 Turning conveyor belt 14 Second reading sensor unit 24 Central reference Positioning unit 52 Turning unit drive belt 60 Turning unit drive motor 61 Turning conveyance belt drive motor 92 Book original 200 Sheet original 300 Printer 310 Main control board 311 Turning conveyance belt drive control board 312 Turning unit drive control board 313 Operation display board 314 First Image processing board 317 Second image processing board

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Takahashi             1-3-3 Nakamagome, Ota-ku, Tokyo, stock             Company Ricoh

Claims (4)

[Claims] 1. A page turning method for turning pages of a book manuscript page by page, wherein a belt is used as a page turning means for turning pages of the book manuscript, and a book manuscript opened by page adsorbing means on the belt. The pages are attracted and the shape of the belt is sequentially deformed from one end side to the other end side of the book document to separate the pages attracted by the belt from the next page of the book document. How to turn pages of a book manuscript. 2. A page-turning device for turning pages of a book manuscript page by page, comprising page-turning means comprising a belt for turning pages of the book manuscript, and pages of the book manuscript opened by the page-turning means. Page adsorbing means for adsorbing the book, and belt deforming means for separating the page adsorbed on the belt from the next page of the book original by sequentially deforming the shape of the belt from one end side to the other end side of the book original. A page turning apparatus for a book document, wherein the page attracting means is an unequal electric field applied to the page turning means. 3. The page turning apparatus for book originals according to claim 2, further comprising high-frequency charge eliminating means for eliminating high-frequency electricity from the non-uniform electric field applied to the page-turning means. 4. A member for giving an unequal electric field to the page-turning means and a member for high-frequency neutralizing the unequal electric field given to the page-turning means are constituted by a common bias roller which contacts the page-turning means. 4. The page turning apparatus for book originals according to claim 3, wherein