JPH0451052A - Original reader - Google Patents

Abstract

PURPOSE:To successively read original information on an original carrying and placing face by one action of carrying the original by making 1st and 2nd original reading means for respectively reading the original information on the front and rear sides of the sheet original keep a distance which is equal to or longer than the length of an original in a sub-scanning direction. CONSTITUTION:The 1st original reading means 9 which is provided on the surface side of the sheet original carrying path 116 and read the original information on the front side of the sheet original 200 and the 2nd original reading means 14 which is provided on the back face side of the sheet original carrying path 116 and reads the original information on the rear side of the sheet original 200 are made to keep the distance which is equal to or longer than the length of the sheet original 200 in the sub-scanning direction. Thus, the original information on both sides of the sheet original can be successively read by one action of carrying the sheet original to the original carrying and placing face without the need of a storage means such as a buffer and a memory, etc., and an original reversing means, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a document reading device such as a copying machine and a facsimile machine having a function of simultaneously reading sheet documents on the screen.

(Prior Art) As a document reading device in a copying machine, facsimile, etc., a sheet document is automatically conveyed to a document reading position, the document information is read, and the read document is automatically ejected from the document reading position. Automatic document feeders (ADF) are known.

In this way, if the document is a sheet document, the document information can be automatically read by installing an ADF, but if the document is a book document, an automatic page turning mechanism can be implemented. Due to the current situation, it is currently only possible to turn the pages of a book manuscript manually.

In view of the current situation, various methods and means have been proposed to automate the time-consuming reading of book manuscripts.

However, many of these conventional techniques are only proposals based on ideas, and have not yet reached a level where they can be realized.

On the other hand, by taking advantage of the automatic document feeding function of the ADF mentioned above, two JJKM
A reading means is arranged, and the sheet 1 is placed on the document conveying and placing surface.
- A document reading device has been proposed in which document information on both sides of a sheet document is individually read by these two document reading means while the document is being conveyed (Japanese Unexamined Patent Publication No. 1-194658, etc.).

(Problem to be Solved by the Invention) By the way, in the conventional document reading device disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 1-194658, two document reading means for reading document information on both sides of a sheet document are provided.
They are placed at approximately the same position on both sides of the document transport and loading surface where the sheet document is transported, so it takes two pages (for both sides of the sheet document) to output this document information to an external device such as a printer. This requires a storage means such as a buffer memory, and has the disadvantage of complicating its output control.

Here, if the above-mentioned original reading means is single, the above-mentioned storage means is not required, but in this case, in order to read the original information on both sides of the sheet original, it is necessary to reverse the sheet original. Since a reversing means is required, the document conveyance path becomes long, which has the drawback of damaging the sheet document and slowing down the reading processing speed.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to transfer sheet originals to the original transporting surface without the need for storage means such as a buffer memory, and original reversing means. With one document transport operation (sheet through mode),
It is an object of the present invention to provide a document reading device having a simple configuration that can sequentially read document information on both sides of a sheet document.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a first JX document reading unit that is disposed on the front side of a sheet document conveyance path and reads document information on the front surface of a sheet document; A second document reading means disposed on the back side of the sheet document conveyance path and configured to read document information on the back side of the sheet document has a separation distance equal to or longer than the length of the sheet document in the sub-scanning direction; The configuration is such that document information on both sides of a sheet document is sequentially read in one conveyance.

(Function) According to the present invention, the first document reading means is arranged on the front side of the sheet document conveyance path and reads the document information on the front side of the sheet document, and the first document reading means is arranged on the back side of the sheet document conveyance path and reads the document information on the front side of the sheet document. Since the second document reading means for reading the document information on the back side of the document has a distance greater than the length of the sheet document in the sub-scanning direction, the storage means such as a buffer memory and the document reversing means The document information on both sides of the sheet document can be sequentially read by one document conveyance operation (sheet-through mode) of the sheet document to the document conveyance and placement surface without requiring any means or the like.

(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

However, in order to avoid complicating the explanation, illustrations and disclosures thereof will be omitted to avoid complicating the explanation, as well as the configuration and operation within the range that can be clearly recalled from the description of this specification, as well as the above-mentioned and other objects and novel features of the present invention. , or simplify it.

First, with reference to FIG. 1, the structure around the turning conveyance belt in the document reading apparatus according to the present invention will be described.

FIG. 1 is a schematic cross-sectional view of a multi-function document scanner A (hereinafter referred to as 'MFDS') in which the present invention is implemented.

In FIG. 1, the turning conveyor belt 8 is
2, tension roller 13, first belt support roller 97
, second belt support roller 98, third belt support roller 9
9, supported by a fourth belt support roller 100 and a fifth belt support roller 101.

At this time, the turning conveyor belt 8 reads this page through the turning roller 2, the first bias roller 3, the 10th roller 4, the 20th roller 5, and the presser roller 6 of the page turning reading unit 1. Support surrounds Unit 1.

The tension roller 13 is pulled leftward in FIG. 1 by the belt tension spring 112.
Appropriate tension is applied to the turning conveyor belt 8 to press the document surface of the book document 92.

The belt tension sensor 32 is connected to the tension roller 13
The tension of the conveyor belt 8 is detected from the amount of movement.

On the other hand, a sheet original 2
00, a sheet document side guide 93 for adjusting the setting position of the sheet document 200 in the side direction, and a sheet document tray 94 for setting the sheet document 200.
A paper discharge tray 23 on which 0 is placed is provided.

In addition, in the paper feed section 21 of the MFDS (upper right in Fig. 1),
A sheet document sensor 25 that detects whether or not a sheet document 200 is set, a paper feed roller 96 and a paper feed separation pad 95 that separate and feed the sheet document 200 one by one, and a paper feed that measures the timing of feeding the sheet document 200. A sensor 26 is provided.

Furthermore, a first conveyance guide 108 and a second conveyance guide 109 that constitute a conveyance path for the sheet document 200 are provided.

Further, a second bias roller 11 for charging the sheet document 200 when conveying the sheet document 200 is provided on the outside of the flip-up conveyance belt 8 slightly to the left of the belt support roller 97, and a bias opposing roller for support is provided inside the second bias roller 11 for charging when conveying the sheet document 200. There are 102.

Furthermore, a conveyance guide claw 115 is provided at the lower end of the second conveyance guide 109 to assist in conveyance of the sheet document 200.

Further, the fourth belt support roller 100 has a sixth opposing roller 105, the fifth belt support roller 101 has a seventh opposing roller 106, and the drive roller 12 has a paper ejection roller 107.
They are respectively disposed on the outside of the flip-up conveyor belt 8, sandwiching the flip-up conveyor belt 8.

Further, a sheet document 200 is placed on the outside of the turning conveyor belt 8 from the third belt support roller 99 to the drive roller 12.
A third conveyance guide 110 forming a conveyance path is provided.

Here, from the second belt support roller 98 to the third belt support roller 99, the document placement surface 116 on the top surface of the document table 18 is used as a conveyance path for the sheet document 200.

This document placement surface 116 is formed in black in order to facilitate detection of the leading edge of the book document 92 when detecting the size of the book document 92 by pre-scanning.

On the other hand, in the paper discharging section 22 of the MFDS at the upper left in FIG. 1, there is a paper discharging sensor 28 in front of the paper discharging roller 107, which detects the presence or absence of a jam when the sheet document 200 is discharged.

Furthermore, a paper discharge separating claw 111 is formed below the paper discharge port 117 of the paper discharge section 22, and assists in smooth paper discharge of the sheet document 200.

A second belt support roller 98 is attached to the document table 18 of the MFDS.
A fourth opposing roller 103 is disposed below the third belt support roller 99, and a fifth opposing roller 104 is disposed below the third belt support roller 99. 2, the first opposing roller 15 is below the presser roller 6, and the second opposing roller 1 is below the presser roller 6.
6 is.

A second reading sensor unit 14 is disposed below the first reading sensor unit 9, respectively.

Further, when the page turning reading unit 1 is at the end position position 1-C (the stopping position of the page turning reading unit 1 in the reading mode of the sheet original 200), a third reading sensor unit 9 is located under the first reading sensor unit 9. A book size upper limit sensor 33 is provided below the opposing roller 17 and the turning roller 2, respectively.

Further, in the center of the document placement surface 116, a book document 92 is provided.
A central reference positioning portion 24 is formed for determining the placement position of the paper.

The center reference positioning section 24 includes a center positioning plate 113 that contacts the spine of the book document 92 when the book document 92 is placed thereon, and a center positioning plate 113 that provides a tendency to rise relative to the center positioning plate 113. Spring 11
4 and a book document sensor 27 for detecting the amount of downward displacement of the central positioning plate 113 when the book document 92 is placed thereon.

At the bottom of the document table 18 configured in this way.

A stand 91 is provided to support the MFDS substantially horizontally.

On the other hand, a transport unit locking device 140 having a built-in transport unit lock sensor 31 is disposed on both sides of the portion of the transport unit 19 that contacts the document table 18, and controls the open/closed state of the transport unit 19 and document table 18. Detected.

As mentioned above, this MFDS has 200 sheet originals.
The device is configured as a document reading device that has both automatic document feeding and reading functions as well as book document reading and automatic page turning functions.

Next, the configuration of the drive system in this document reading device will be described with reference to FIGS. 2 to 4.

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 the end of the page turning reading unit 1. FIG.

2 to 4, in the page turning reading unit 1, the scanning pipe 51 of the turning unit driving plate 49 is inserted into a pair of scanning ronds 50 that are horizontally suspended in parallel to the front side and the back side of the 1MFDS. As a result, the MFDS is slidably supported along the left and right direction of the MFDS.

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

Further, as shown in FIG. 3, a first shaft 64 and a second shaft 65 are rotatably supported between the front side plate 56 of the conveyance unit and the rear side plate 57 of the conveyance unit.

A driving pulley 62 and a driven pulley 63 are fixed to each of the first shaft 64 and the second shaft 65 on the front side and the back side thereof, and the driving pulley 62 and the driven pulley 63 Two turning unit drive belts 52 are suspended from each other, with 63 as a pair.

As shown in FIGS. 3 and 4, this page turning reading unit 1 is constructed by a drive belt fixing portion 53 of a turning unit drive plate 49, and a drive belt fixing plate 54 and a drive belt fixing screw 55. 52, and is driven by the rotation of this turning unit drive belt 52.

Further, a first gear 66 is fixed to the first shaft 64 on the back side thereof, sandwiching the rear side plate 57 of the conveying section, and this first gear 66 is fixed to the output shaft of the turning unit drive motor 60. The rotation of the turning unit drive motor 6o is transmitted to the second gear 67, and the rotation of the turning unit drive motor 6o is transmitted to the driving pulley 62, the turning unit drive belt 52, the driven pulley 63, and
The page turning reading units 1 are respectively driven.

On the other hand, as shown in FIG.
0 and the third shaft 121 fixed coaxially with the drive roller 1
2 and a fourth shaft 122 fixed coaxially with the paper feed roller 9
The seventh shaft 125 is coaxially fixed to the belt supporting roller 97, and the eighth shaft 126 is coaxially fixed to the first belt support roller 97.
They are each rotatably supported between a transport section front side plate 56 and a transport section rear side plate 57.

The fourth shaft 122 holds the rear side plate 57 of the conveying section,
A third gear 68 is fixed to the rear side thereof.

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

Further, a sixth gear 74 fixed to the output shaft of the flip conveyor belt drive motor 61 is engaged with the fifth gear 73, and a fourth gear 69 is meshed with the third gear 68, so that the flip conveyor belt drive motor 61 The rotation of the conveyor belt 8 is sequentially transmitted, and the drive roller 12 is driven to rotate the turning conveyor belt 8.

In addition, as shown in FIGS. 2 and 3, the eighth shaft 1
26, a second paper feed pulley 1 is installed on the back side of the rear side plate 57 of the conveying section.
30 is connected to the first paper feed pulley 12 via a paper feed clutch 128 on the back side of the rear side plate 57 of the conveyance unit.
9 are fixed, respectively, and the second paper feed pulley 130
A paper feed drive belt 127 is connected to the first paper feed pulley 129 and the first paper feed pulley 129.
is suspended.

As a result, the rotation of the first belt support roller 97 caused by the rotation of the turning conveyor belt 8 is as follows.

The information is sequentially transmitted to the eighth shaft 126, the second paper feed pulley 130, the paper feed drive belt 127, and the first paper feed pulley 129.
The signal is transmitted to the input side of the paper feed clutch 128.

Further, the paper feed clutch 128 is activated by a control signal sent from the main control board 310 (see FIG. 50), and the seventh shaft 125 and the paper feed roller 96 are driven.

On the other hand, the first opposing roller 15, second opposing roller 16, and third opposing roller 17 shown in FIG.
Moreover, they are each driven at the same circumferential speed.

Next, the configuration of the page turning reading unit 1 will be explained with reference to FIGS. 1 to 4.

In FIGS. 1 to 4, the first turning unit side plate 4
0 and the second turning unit side plate 41.

A turning roller 2 is disposed facing each other at a position sandwiching the turning conveyor belt 8, and a turning roller 2 is disposed between the first turning unit side plate 40 and the second turning unit side plate 41.
, first bias roller 3, 10th roller 4, 20th roller 5
, and press roller 6 are each rotatably supported.

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

Therefore, let us explain by taking No. 10-L4 as an example.

As shown in FIG. 5, the tenth shaft 123, which has both ends fixed to the first turning unit side plate 4o and the second turning unit side plate 41, is a hollow shaft. A pair of bearings 131 that are inserted into the hollow part of the 10th shaft 123 and supported by both ends of the 10th shaft 123 allow the tenth shaft 4 to rotate freely with respect to the fifth shaft 123. is supported by

Here, these reroller 2, first bias roller 3, 10th roller 4, 20th roller 5, and presser roller 6
does not rotate itself, but is rotated only by the rotation of the flipping conveyor belt 8.

Further, on the outside of the first turning unit side plate 40 and the second turning unit side plate 41, a rotation support rod 42 (configured in the same way on both sides) is provided at a longitudinally extending position of the first reading sensor unit 9 shown in FIG. ) are each rotatably supported.

Therefore, the support structure for only one side of the rotation support rod 42 will be explained. As shown in FIG. 4, the rotation support rod 42 has a sliding pipe 43. Second spring retaining claw 48
, are configured integrally with the upper limit detection section 76.

In FIG. 4, the tilt correction spring 44 is formed of a torsion coil spring, with one end attached to the rotation support rod 42 and the other end attached to the first turning unit side plate 40.
Each is fixed.

This tilt correction spring 44 is in its natural state.

That is, when no external force is applied to the inclination correction spring 44, the axial direction of the sliding pipe 43 (vertical direction in FIG. 4) and the optical axis direction of the reading optical system of the first reading sensor unit 9 (the first The reading sensor unit 9 is configured to match the movement direction (details will be described later) with respect to the first turning unit side plate 4o and the second turning unit side plate 41.

As a result, when the first turning unit side plate 40 and the second turning unit side plate 41 rotate integrally around each rotation support rod 42, the tilt correction spring 44 causes the first turning unit side plate 4 to rotate as a unit.
A rotational force is always applied to the 0 and 2nd turning unit side plates 41 to return them to the initial state, and these 1st and 2nd turning unit side plates 41
Turning unit side plate 40 and second turning unit side plate 4
1 is corrected in a timely manner.

Moreover, the sliding pipe 43 is configured to slide smoothly on the sliding support rod 46, as shown in FIG.

The upper end of this sliding support rod 46 is connected to an upper Rondo support plate 70.
Furthermore, the lower ends of the sliding support rods 46 are fixed to a lower rod support plate 71, respectively.

Further, a first spring retaining pawl 47 is formed on the upper Rondo support plate 70, and a second spring retaining pawl 48 is formed on the upper part of the sliding pipe 43. Both ends of the upper and lower springs 45 of the turning unit, which are mounted between the sliding pipe 43 and the upper rod support plate 70, are respectively locked by the spring retaining claws 48.

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 and slides. It slides upwardly in FIG. 4 along dynamic support rod 46.

At this time, a sliding force is acting on the sliding pipe 43 to return it to the above-mentioned normal state due to the elasticity of the turning unit upper and lower springs 45 that constantly press the second spring retaining pawl 48 downward.

Further, the upward sliding range of the sliding pipe 43 is determined by the scan cutoff sensor 34 disposed on the turning unit drive plate 49 detecting the upper limit detection section 76 provided on the sliding pipe 43. The upward sliding position of the sliding pipe 43 is set to be the limit position.

On the other hand, as shown in FIG. 4, the turning unit drive plate 49 includes an upper rod support plate 70, a lower rod support plate 71, a first spring retaining pawl 47, a scanning pipe 51. A drive belt fixing part 53, and.

It is formed integrally with the home detection filler 75.

Further, the drive belt fixing portion 53 of this turning unit drive plate 49 is fixed to the turning unit drive belt 52 by the 1M moving belt fixing plate 54 and the drive belt fixing screw 55, as described above.

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

As a result, as described above, the turning unit drive belt 52 is driven, and the page turning reading unit 1 is
When the home position 1-A is reached, the home sensor 30 shown in FIG. 3 is configured to detect the home detection filler 75 of the scanning pipe 51.

Next, with reference to FIGS. 6 to 8Wi, the configuration of the transport section locking device in this document reading device will be described.

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

The transport section locking device 140 includes a lock release solenoid 132, a lock rod 134, and the like.

6 to 8, the lock release solenoid 13
2 is connected to one end of the lock release solenoid arm 133.

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

Unlocking solenoid arm 13 of this locking rod 134
An electromagnetic lock 141 is arranged on the side of the side facing 3.

Further, at the other end of the lock rod 134, a lock pawl 134a is formed which is bent into a key pawl shape toward the side where the lock release solenoid arm 133 is disposed.

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

The other end of the lock spring 135 is connected to a portion of the conveying section 19, thereby giving the lock rod 134 a clockwise rotational behavior in FIG.

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

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

In FIG. 6, when the conveyance section 19 is closed while being pushed down, the lower end of the lock pawl 134a of the lock rod 134 comes into contact with the lock pin 139, and the lock rod 134 is moved to its rotating section, as shown in FIG. 136 as the rotation axis, it is rotated counterclockwise.

From this state, when the conveying section 19 is further closed, the eighth
As shown in the figure, the lock claw 134a of the lock rod 134 is caught on the lock pin 139, and the conveying section 19 is fixed to the document table 18.

Also, when the transport section 19 is locked, the lock rod 13
The locking claw 134a of 4 locks the transport section lock sensor 3.
1 is activated.

This unlocking of the transport section 19 is executed by pressing the open key 620 on the operation display board 313 shown in FIG. 16.

That is, the open key 620 of the operation display board 313
When pressed, the lock release solenoid 132 is activated, the lock rod 134 is rotated counterclockwise about the rotating part 136, and the lock pawl 134a of the lock rod 134 is disengaged from the lock pin 139, and the transport (not shown) is released. The transport section 19 is opened upward by the opening/closing spring (see FIG. 10).

However, this open key 620 is programmed not to operate (do not accept input) during a series of page turning scans of the book document 92, during reading and scanning, and when the sheet document 200 is being conveyed. ing.

In addition, when the open key 620 does not receive an input, the electromagnetic lock 141 is activated, and the electromagnetic lock 141 locks the lock rod while the lock claw 134a remains engaged with the lock pin 139. The rotation of 134 is restricted.

The MFDS configured as described above is shown in FIGS. 9 and 10.
As shown in the figure, the printer 300 is used by being mounted on the top of the printer 300, for example.

FIG. 10 shows the transport section 1 of this MFDS as described above.
9 is shown in an open state.

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

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 perspective view of the vicinity 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 configuration, the configuration of only one of them will be described here.

As shown in FIG. 11, the first reading sensor unit 9 includes a reading sensor bracket 1 formed in a U-shape.
46, and is arranged to be vertically movable with respect to the reading sensor bracket 146.

The reading sensor bracket 146 has both ends connected to the first turning unit side plate 4o and the second turning unit side plate 41.
By being fixed to, it is configured integrally with the page turning reading unit 1.

A reading sensor stand 148 is fixed downwardly slightly inside the end of the reading sensor bracket 146.

The lower end of this reading sensor stud 148 is.

As shown in FIG. 13, the first reading sensor unit 9
It is fitted into a boss 149 formed at the end of.

Thereby, the first reading sensor unit 9 is supported via 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 to be prevented from coming off from each other by a flange-like hook formed at the lower end of the reading sensor stand 148.

Further, a reading sensor spring 147 is mounted between the base of the reading sensor stand 148 of the reading sensor bracket 146 and the base of the boss 149 of the first reading sensor unit 9. The force imposes a downward displacement habit on the first reading sensor unit 9.

As a result, the first reading sensor unit 9 is always located at the bottom of the page turning reading unit 1.
For example, when the book original 92 is subjected to an external force due to irregularities on its surface, the book original 92 can be
It moves up and down smoothly along the unevenness of the surface of 2.

Further, at the end of the first reading sensor unit 9, a first
1, the reading sensor release solenoid 15 is activated via the reading sensor release solenoid arm 151.
0 is attached.

This reading sensor release solenoid 150 is.

As shown in FIG. 12, the page turning unit 1 is fixed to the side plate 40 of the first turning unit, and the page turning unit 1 is fixed to the side plate 40 of the first turning unit.
The reading sensor release solenoid 150 is activated when the reading sensor is moved, for example, during a page turning operation, when an unread page is being scanned blankly, and when returning from the sheet document scan mode.

When this read sensor release solenoid 150 is activated, it resists the elasticity of the read sensor spring 147 and
The first reading sensor unit 9 is moved upward, and its document scanning surface is retracted (separated) from the surface of the document.

This first reading sensor unit 9 is connected to the turning roller 2.
A signal from the encoder 152 generated by the rotation of the image sensor 152 is used as a reference signal for reading the image.

The turning roller 2 and the encoder 152 are constructed as shown in FIG. 14.

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

In FIG. 14, at the rear end of the turning roller 2,
A crown-shaped fish 153 is provided.

The fissure 153 is configured by forming slits of the same width at equal intervals on the circumference.

The encoder 152 is fixed to the second turning unit side plate 41 so as to sandwich the fish 153 vertically.

As a result, this encoder 152 controls the turning roller 2
The second filler 153 periodically interrupts the detection optical path of the encoder 152 in accordance with the rotation of the encoder 152, thereby generating a reference signal for image reading by the first reading sensor unit 9.

On the other hand, the positioning of the book document 92 with respect to the document table 18 is performed by the central reference positioning section 24 .

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

This central reference positioning portion 24 serves as a reference position when reading and scanning the book original 92 and when scanning and turning pages.

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

In this groove, a central positioning plate 113 is placed on the document placement surface 1.
16 so that it can be moved up and down.

The center positioning plate 113 is always given the habit of rising by a center positioning spring 114 disposed at its lower part.

The upward movement of the center positioning plate 113 due to this habit is caused by a stopper 1 formed at the edge of the groove on the document placement surface 116.
18, the stopper claw 119 of the central positioning plate 113 comes into contact with the center positioning plate 113, thereby stopping the movement at the position indicated 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 center positioning plate 113 in the groove.

That is, when the spine (binding portion) of the book original 92 is placed on the center positioning plate 113 in the groove, the center positioning plate 113 is pushed downward by the book original 92's own weight.

As a result, the book document sensor 27 disposed on the side of the groove of the document placement surface 116 detects the movement of the central positioning plate 113, and the setting of the book document 92 is recognized.

By the way, an MFDS operation display board 313 is arranged on the entire surface of the document table 18 (see FIG. 9 and FIG. 1013!il).

This operation display board 313 is as shown in FIG.
A large number of input keys are arranged.

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

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

The enter key 601 is pressed to confirm the input when inputting a selection using the numeric keypad or on the liquid crystal display panel.

A numeric keypad 602 is used to set the number of copies of the document to be printed, the number of pages to be turned, and the like.

The reading start page selection key 603 is pressed to the “left” when facing the book manuscript 92 in the book manuscript reading mode.
- "Right" A key for selecting which page to start reading from, and each time this key is pressed, the left and right of the reading R start page of the book manuscript 92 is switched.

The starting page for reading when this key is initially set is:
The "left" page is set, and whether the reading start page selected by this key is on the left or right side of the book manuscript 92 can be determined by the two reading start page display LEDs 6.
31 is displayed depending on which one is lit.

The total read 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.

To set the total number of read pages of the book manuscript 92, press the total read page setting key 606 and press the numeric keypad 602.
After inputting the number of pages, it is confirmed by pressing the enter key 601, and this 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 manual mode" in the book document reading mode.

Also, each time this key is pressed, the display on the book size display LED 632 changes between "Auto", "Standard", and "
The mode displayed by the book size display LED 632 is selected.

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

Here, book size key to manual mode.

There are "Standard" and "Irregular (m input)", and only when the book size is A5, B5, A4, by selecting rStandard J, you can change the book size using the fixed book size selection key 619. Enables input.

Each time this standard book size selection key 619 is pressed, the standard book size display LED 633 changes to rA.
The books are switched in the order of EJ rB5J rA4J, and the selected book size is displayed and recognized.

At the time of initial setting of this standard book size selection key 619,
The standard book size display LED 633 displays "A4"
It becomes.

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

Here, if the book manuscript 92 has a size other than the standard book size described above, the book size selection key 607 allows
After selecting "Irregular shape (Peng input)" and inputting the vertical size and horizontal size (in meters) of the set book manuscript 92 using the numeric keypad 602, press the enter key 601.
Press to confirm the book size.

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

The book binding mask area setting key 608 sets the non-reading area (mask area) from the center of the central reference positioning unit 24 to the "left (
-)JrRight(+)" is pressed.

That is, when forming a mask area in the book binding part of the book original 92, first, use the book binding part mask area setting key 608 to set which page on the left or right side of the book original 92 the mask area is to be formed, and then. , select the length (in units of cabinets) of the left mask area (-) or the right mask area (+) using the numeric keypad 60.
2, then press the enter key 601 to confirm this input value.

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

The value of the mask area at the time of initial setting of the book binding mask area setting key 608 is "±10 degrees."

The reading area selection key 609 is used to select the reading area of the book original 92 in the book original reading mode: ``one page (left)'', ``one page (right)'', or ``both pages''. Pressed when selecting.

Every time this reading area selection key 609 is pressed once,
The display of the reading area display LED 636 is r page (left)
"R single page (right)" and "Both pages" are switched in this order, and the selected reading area is displayed and recognized.

The reading area display LED 636 displays the following when the reading area selection key 609 is initially set.

r both pages.”

Here, when "r page (left)" is selected, only the left page of the book manuscript 92 is read and scanned, and the right page is not read and scanned.

In addition, if "R piece page (right)" is selected here,
Only the right page of the book manuscript 92 is read and scanned, and the left page is not read and scanned.

The two-page spread quick copy key 610 is a "two-page spread continuous reading mode" in the book document reading mode.

When in the "duplex mode", it is pressed to instruct to print out the read document information at the same magnification.

The two-page spread quick copy reduction key 611 is pressed to instruct to print out the scanned document information at a reduced magnification when in the "two-page spread continuous reading mode" of the book document reading mode and its "duplex mode". be done.

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

In addition, the standard reduction magnification at the time of initial setting of this two-page spread continuous shooting reduction key 611 is "Original size x 0.71 (A
The duplex mode selection key 612 set to ``3→A4/B4→B5)'' selects which side to display when the book document reading mode is ``duplex mode'' of ``two-page spread reading mode''. , you can also select which side to print with the "two-sided spread mode".
[Original duplex mode J “Sequential duplex mode”
Pressed when selecting from among the three duplex modes.

Each time this duplex mode selection key 612 is pressed once, the duplex mode display LED 634 changes to "spread duplex mode,""original duplex mode," or "sequential duplex mode."
The selected reading area is displayed and recognized.

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

Here, if "Two-sided spread mode" is selected,
Of both the left and right pages of the opened book manuscript 92, double-sided printing is performed with the left page facing up and the right page facing down.

At this time, by pressing the reading start page selection key 603,
When the reading start page of the book manuscript 92 is set to "right", the first print is a single-sided print.

In addition, if the "original duplex mode" is selected here, the right page of both the left and right pages of the spread book manuscript 92 is turned face up, and the left page of the next page turned by the page turning operation is Double-sided printing is performed with one page facing out.

That is, in this "original double-sided mode", printing is performed in exactly the same manner as the binding of the book original 92 to be read.

At this time, by pressing the reading start page selection key 603,
When the reading start page of the book manuscript 92 is set to "right", the first print is a single-sided print, as in the case of the "two-sided spread mode".

Furthermore, if the "sequential duplex mode" is selected here, the page set with the reading start page selection key 603 out of both the left and right pages of the spread book document 92 is displayed, and the page turning operation The next page turned over is turned over, and thereafter, double-sided printing is performed in the order in which the pages are read.

The two-page spread continuous shooting high-speed print setting key 613 slows down the operation of the page-turning reading unit 1 near the binding part of the book document 92 when in the "single-sided mode" of the "two-page spread continuous reading mode" of the book document reading mode. Alternatively, it is pressed when instructing continuous printing of both the left and right pages of the book manuscript 92 by continuously executing reading and scanning without stopping.

The print magnification key 614 is a key for setting the magnification ratio when magnifying and printing a read image.

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

Here, to change the magnification ratio, move the cursor to the desired magnification ratio using the cursor movement key 617, then press the enter key 601.
It is confirmed by pressing .

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

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

Here, the image processing mode is determined by moving the cursor to the desired image processing mode using 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 this mode setting selection key 616 is pressed, the preset MFDS operation mode is displayed on the liquid crystal display panel 630.

Here, to set the operation mode of the MFDS, move the cursor to the desired MFDS operation mode, then press the enter key 6.
It is confirmed by pressing 1.

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

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

That is, if there is a page among the pages of the book manuscript 92 that you want to skip without performing manuscript reading scanning, first press this reading skip page setting key 61.
8, then use the numeric keypad 602 to enter the number of pages from the reading start page of the book manuscript 92 that you want to skip (skip page), and then press the enter key 601 to select this skip page. Confirm the page.

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

Standard book size selection key 619 is a key for selecting the book size of book manuscript 92.

As mentioned above, the booksize key manual mode includes
There are ``Standard'' and ``Irregular (Cabinet input)'', and only when the book size is A5, B5, A4, by selecting ``Standard'', this fixed book size selection key 619
You can enter the book size using .

Each time this standard book size selection key 619 is pressed, the standard book size display LED 633 changes to rA.
5"rB5" and "A4", and the selected book size is displayed and recognized.

At the time of initial setting of this standard book size selection key 619,
The standard book size display LED 633 displays "A4"
It becomes.

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

The open key 620 is pressed to open the transport section 19 of the MFDS.

In the sheet original reading mode, the sheet original set selection key 625 is used to set the original side of the sheet original 200 set on the original placing surface 116 to face up when in the ``single-sided original reading mode'' of the ``sheet original through mode''.・
This key is used to select either "downward".

Each time the sheet original set selection key 625 is pressed once, the display of the sheet original set display LED 635 is switched in the order of "upward" and "downward", and the selected sheet original set side is displayed and recognized.

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

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

A schematic sectional view of this printer 300 is shown in FIG.

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

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

In FIG. 18, a laser beam emitted by a semiconductor laser 171 is converted into a parallel light beam by a collimating lens 172, and shaped into a uniform light beam by an aperture 173.

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

This polygon mirror 175 has a precise polygonal shape, and is rotated in a constant direction at a constant speed by a polygon motor 176.

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

The laser light incident on the polygon mirror 175 is as follows.

The reflected light is deflected by rotation of the mirror.

This deflected laser beam is transmitted to each fθ lens 1'17a,
The light is input to 177b and 177c.

These fθ lenses 177a, 177b.

177c transmits scanning light with a constant angular velocity to the photoreceptor drum 17.
0, a function to form an image of this scanning light so that it becomes the minimum light spot on the photoreceptor drum 170, and a function to correct the surface tilt.

The light that has passed through each of the fθ lenses 177a, 177b, and 177c is guided outside the image area by a synchronization detection mirror 178 to a synchronization detection sensor 179, and after a synchronization signal that generates a cue signal in the main scanning direction is output, One line of image data is output after a certain period of time, and one image is formed by repeating this process.

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

Here, as the photoconductor sensitive to the wavelength of 780 nm of the semiconductor laser 171, an organic photoconductor (OPC),
A-3i, 5e-Te, etc. are known, but in this example, an organic photoreceptor is used.

Additionally, in the case of laser writing, there is generally an N/P process in which light is applied to the image area, and a P/P process in which light is applied to the background area. The N/P process is adopted.

In FIG. 17, the surface of the photoreceptor drum 170 is uniformly negatively charged by a Scorotron type charger 180 having a grid on the photoreceptor drum 170.

Next, when the negatively charged image area of the photoreceptor drum 170 is irradiated with laser light and the image area potential is lowered, the surface area potential of the photoreceptor drum 170 becomes -.
An electrostatic latent image with an image area potential of about 150V is formed.

This electrostatic latent image is applied to the developing roller of the developing device 181 by -50
A bias voltage of 0 to -600 V is applied to visualize the image using negatively charged toner.

The image developed by the developing device 181 is transferred to a transfer charger 182 which charges the transfer paper with a positive potential from the back side of the transfer paper, which is fed in synchronization with the rotation of the photoreceptor drum 170. It is transcribed by the transcriptional action of .

The transfer paper on which this image has been transferred is transferred to the transfer charger 182.
The photoreceptor drum 170 is separated from the surface of the photoreceptor drum 170 by being subjected to alternating current neutralization by a separation charger 183 held integrally with the photoreceptor drum 170 .

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

Further, the potential pattern remaining on the surface of the photoreceptor drum 170 is erased by being irradiated with light from the static elimination lamp 186.

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

The photosensor 187 is composed of a light-receiving element and a light-emitting element, and measures the reflection density on the surface of the photoreceptor drum 170, and measures the reflection density (toner density after development) to a preset reference value or less. When this occurs, a toner replenishment signal for replenishing new toner into the developing device 181 is output.

That is, for example, this photosensor 187 writes a certain pattern (pure black or halftone dot pattern) with its optical writing section at a position corresponding to the reading position of this photosensor 187, and develops this pattern. The density of the developed image is determined based on the ratio of the light reflectance of the area and the light reflectance of the photoreceptor drum 170 outside of this pattern area, and when the density of this image is lower than the reference value, a toner replenishment signal is issued. is configured to output.

Here, if the new replenishment toner is about to run out, the photo sensor 187 is used as a sensor for detecting the lack of remaining toner, taking advantage of the fact that the developing density does not increase even if a toner replenishment signal is output. It may be configured so that it can also be used as

On the other hand, the printer 300 of this embodiment has a plurality of cassettes 1.
88a and 188b, and is configured so that the transfer paper on which the image has been transferred can be fed on both sides through a paper refeeding loop 189.

That is, in FIG. 17, when the start button of the printer 300 is pressed after a predetermined cassette is selected, each paper feed roller 190 of each cassette 188a', 188b is pressed.
The paper feed roller on the selected side of a and 190b is rotated, and the transfer paper in the cassette is transferred to the registration roller 19.
It is fed until it hits nip 1.

The registration roller 191 starts rotating at the timing when the position of the image formed on the photoreceptor drum 170 and the position of the transfer paper are synchronized.
Feed the transfer paper toward the surface of the paper.

As a result, as described above, this transfer paper has the image transferred thereto, is further separated from the surface of the photoreceptor drum 170, and is then suction-conveyed to the separation conveyance section 192, where it is transferred to the heat roller 193 and the pressure roller. A fixing roller 194 fixes the toner transferred onto the paper surface.

During normal printing, the transfer paper on which the toner has been fixed is placed in the position shown in FIG. is discharged to the top.

Here, when the print mode of the printer 300 is "duplex mode", the switching claw 195 is switched to the position shown in FIG. Transfer paper is conveyed.

This transfer paper passes through the reversing guide claw 196, and then
After being guided onto the reversing guide tray 197, the reversing guide claw 196 is switched and the reversing guide roller 198
is reversely rotated (reversed), refeeding loop 1
89 until it comes into contact with the nip of the registration roller 191 again.

In this way, the re-fed transfer paper is transferred to the 191st m
Switching claw 195 switched to the initial state shown in (a)
The paper is then discharged onto the paper discharge tray 169.

Here, if the "r-back paper ejection mode" is set, in which the transfer paper is ejected with the image fixing side of the transfer paper facing the stacking surface of the paper ejection tray 169 when ejecting in the single-sided print mode, , the switching claw 195 is switched to the position shown in FIG.
The transfer paper is not directly ejected, but is then transported toward the double-sided transport path.

Immediately after the rear end of the transfer paper passes the switching claw 195, the switching claw 195 is switched to the position shown in FIG. 19(c), and the direction of rotation of the switchback roller 199 is reversed. , the transfer paper guided to this double-sided conveyance path is conveyed in a switchback manner, and then transferred to the printer 30.
The paper is discharged onto the paper discharge tray 169 through the paper discharge port 0.

In this "back side ejection mode", the transfer paper printed on one side is ejected onto the ejection tray 169 with the image-fixed side facing the stacking surface of the ejection tray 169, so that the original is read and the page rotation is correct. Then, the transfer paper is discharged with the print pages in the same order.

By the way, as described with reference to FIG. 4, the page turning reading unit 1 has a turning roller 2 between the first turning unit side plate 40 and the second turning unit side plate 41.
, No. 10-La 4. 20th roller 5, presser roller 6, and
The first bias rollers 3 are arranged rotatably.

These turning roller 2, 10th roller 4, 20th roller 5, presser roller 6, and first bias roller 3,
As shown in FIG. 20, the reversible conveyor belt 8 is passed over.

A first high-voltage power supply 320 is connected to the first bias roller 3, and is configured to receive AC voltages of different frequencies for attraction and static elimination from two ports, respectively.

Furthermore, a turning guide 10 is provided between the turning roller 2 and the first reading sensor unit 9 inside the page turning reading unit 1.
A page storage section 7 is disposed above each page along the inner circumferential surface of the turning conveyor belt 8.

A page turning resensor 29 made of a photo sensor or the like is disposed in the page storage section 7 to detect errors during page turning.

This page turning resensor 29 may be arranged on the turning guide 10.

Also, between the turning roller 2 and the presser roller 6, a first
As described with reference to FIG. 1, the first reading sensor unit 9 is arranged.

This first reading sensor unit 9 is attached to the page turning reading unit 1 so that it can move up and down by about three cabinets, and when reading a document, it is pushed downward by a reading sensor spring 147, and the book document 9
2, or is configured to be brought into close contact with the document surface of the sheet document 200.

Further, as shown in FIG. 21, this first reading sensor unit 9 includes an LED 316 as an illumination system for the original, an RMLA 81 (roof mirror lens array) as an imaging system for the original image, and an image-forming original. The sensor 315 is equipped with a Si equal-magnification sensor 315 as a photoelectric conversion system that converts an optical image into an electrical 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 focused onto the document surface by the bar lens 83.
M manuscript is illuminated.

Next, the reflected light from the document surface is transmitted to an optical path separating mirror 84.
LA85 (lens array) and R
The light passes through the MA86 (roof mirror array) and is reflected again by the optical path separation mirror 84.

The image light of the original 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 this is converted into an electrical signal by the Si equal-magnification sensor 315. converted and read.

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

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

If the manuscript is a book manuscript 92, the operation display board 31
Press the open key 620 of No. 3 to open the transport section 19 upward as shown in FIG. With the reading start page 92 opened upward, the conveying section 19 is closed as shown in FIG.

In this state, the user operates each key on the operation display board 313 to set reading conditions for the book document 92, and then presses the start key 600 to start the MFDS.

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

At this time, the rotation of the turning conveyor belt 8 is stopped, and the document surface of the book document 92, which is spread open, is pressed down from above.

Further, as described above, the page turning reading unit 1 is rotated about its rotation support rod 42 as a fulcrum, and the sliding pipe 43 integrated therewith is moved up and down along the sliding support rod 46. Book manuscript 9 by being
The first reading sensor unit 9 is moved along the document surface of No. 2 while keeping the first reading sensor unit 9 in close contact with the document surface.

Furthermore, when this page turning reading unit 1 reaches the midway position 1-H of book manuscript reading of the book manuscript 92, the first high voltage power supply 320 shown in FIG. An AC voltage for adsorption is applied, and a striped charge pattern is formed on the flipping conveyor belt 8.

In this way, the page turning reading unit 1.

While forming a stripe-shaped charge pattern on the turning conveyor belt 8, it moves to the eleventh right end position 1-C, and the first reading sensor unit 9
The document information of the book document 92 is read.

When the reading of the document information of the book document 92 is completed as described above, the page turning reading unit 1
As shown in FIG. 2, the end position 1-C is returned toward the home position 1-A.

At this time, as shown in FIG.
Above, an unequal electric field is generated due to the charge pattern formed during the reading operation, and this electrostatic field causes the right page of the book document 92 to be electrostatically attracted to the turning conveyor belt 8. It has become so.

Therefore, in this state, the page turning reading unit 1
When the page turning reading unit 1 is moved toward the end position 1-C and reaches the turning start position 1-D shown in FIG. 22, the turning conveyor belt 8 is moved as shown in FIG. Along with Book Manuscript 92
The edge of one right page of the document is caught in the page turning reading unit 1.

In this way, as the page-turning reading unit 1 moves, the document rolled up in the page-turning reading unit 1 has its leading edge separated by the curvature of the turning re-roller 2 and the stiffness of the document. , and is gradually separated from the turning conveyor belt 8.

In this way, the document gradually separated from the turning conveyor belt 8 is moved along the turning guide 1o shown in FIG. Guided within.

This page storage section 7 is as shown in FIG.

It is formed into a cylindrical shape, and by winding up the document rolled up inside the page-turning reading unit 1 along its inner circumferential surface, it can store one scanned page in an extremely small space. Can store manuscripts.

Therefore, according to this page turning reading unit 1, as shown in FIG.
However, from the turning start position 1-D to the winding completion position 1
-H, it is possible to very smoothly separate one page of the original that has been read from the next page of the original that will be read in the primary reading operation. can.

The document stored in the page storage section 7 in this way is moved to the page turning reading unit 1 at its winding completion position 1.
-E, go beyond the center of the book manuscript 92 toward the page ejection position 1-F on the left page of the book manuscript 92,
Further, by the return movement, the page turning reading unit 1 and the document stored therein begin to be ejected from the page storage section 7 of the page turning reading unit 1 due to relative movement.

Then, this page turning reading unit 1 is moved back to its home position 1-A, and when the movement is completed, this page turning reading unit 1
The ejection of the original stored in the page storage section 7 is completed, and the operation of turning over one page of the original that has been read is completed.

On the other hand, during this document turning operation, the first bias roller 3 The program is such that the electric charge pattern formed on the flipping conveyor belt 8 is neutralized by applying an AC voltage for static elimination from the first high-voltage power supply 320 shown in No. 20@.

Therefore, when the page-turning reading unit 1 returns to its original position, the original that has been read.

Since no electrostatic adhesion force is generated between this original and the conveyor belt 8, the winding operation of this original is
Moreover, the ejection operation can be performed extremely smoothly.

Incidentally, conventionally known devices for holding and conveying sheet members and the like include devices using an air suction method, an electrostatic adsorption method using comb-teeth electrodes and an electric double layer method, and the like.

Further, as a page turning device for book manuscripts, a device using an air suction method or the like has been proposed.

However, each of these methods has drawbacks as will be described later, so it is almost impossible to put into practical use a page turning device for book manuscripts based on these methods.

That is, the air suction method requires an air pump that suctions air to generate negative pressure and an air suction path, which has the drawback of increasing the size of the device.

In addition, in the comb-shaped electrode embedding method, two comb-shaped electrodes are embedded in a dielectric material so that their teeth mesh with each other, and positive and negative voltages are applied to each electrode. This not only increases the cost, but also makes it difficult to form the document turning conveyance belt into an endless belt.

Furthermore, in the electric double layer method, the belt and sheet are charged with charges of opposite polarity through corona discharge, etc., so when turning the pages of a book manuscript, etc., it is necessary to separate the pages to be turned in advance, otherwise the charges will be charged. I can't.

In addition, for example, with other page turning methods that use frictional force such as rubber rollers, the page turning accuracy is severely restricted depending on the paper quality and size of the book manuscript, making it difficult to improve its reliability. .

On the other hand, in the embodiment of the present application, as shown in FIGS. 20, 23, and 24, an AC voltage for adsorption is applied from a high voltage power source 320 to the flipping conveyor belt 8, which is an endless belt. By forming an alternating stripe-shaped charge pattern on the surface of the turning conveyor belt 8,
An unequal electric field is generated on the turning conveyance belt 8 to hold and convey the document and to turn the pages.

Therefore, according to this page turning method, it is possible to hold and convey the document and to turn the pages extremely smoothly.

The basic configuration and electrostatic adsorption principle of this page turning method will be explained below.

Turning conveyor belt 8 used in this page turning method
On the back side of the dielectric material formed in the shape of an endless belt,
A two-layer belt with conductive treatment was used.

Further, as a means for applying an alternating voltage to the turning conveyor belt 8, a first bias roller 3, which is rotatably supported with its peripheral surface in contact with the surface of the turning conveyor belt 8, is used. A high-voltage power supply 320 applied an AC voltage for adsorption.

As shown in FIGS. 2o and 23, while applying an alternating electric field to the first bias roller 3 with the conductive layer 8b of the flip conveyor belt 8 as a ground plane, the flip conveyor belt 8 and the first bias roller 3, on the surface of the dielectric 8a of the flipping conveyor belt 8,
A striped charge pattern is formed.

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

When a dielectric material such as a sheet of paper to be read is brought close to this unequal electric field, polarization occurs inside it, and because of this unequal electric field, an attractive force is applied to the sheet of paper toward the conveyor belt 8. work.

This becomes clear by integrating the area of the maxwell stress over the surface of the paper.

Here, the maxwell stress is It is expressed as

Further, if the normal direction of the surface of the flip-up conveyance belt 8 is taken as the X-axis, the stress of maxwell 1 in the X-axis direction is expressed by equation (b).

Next, by area-integrating the stress fs of the maxwall in the X-axis direction expressed by equation (b) along the outer surface (upper and lower surfaces) of the paper, the object force (adsorption force) N of the paper is calculated. is required.

In other words, the object force (adsorption force) N of this paper is N=/5
fxdS.

As a result, if the friction coefficient of this paper is μ.

The conveying force F of this paper is.

F;μN It is expressed by the formula.

The specific configuration of this embodiment is as follows:
As, 75 μm thick PET film (dielectric material 8a)
An endless belt on which a 10 μm thick aluminum vapor deposited layer (conductive layer sb) was formed was used, and the pitch of the charge pattern formed on the belt was set to 2.4 squares.

In other words, the reading speed of the book manuscript 92 is 120/
S, AC frequency 50Hz, applied voltage ±2kVp-p
And so.

In addition, Fig. 25 shows the experimental values of the pitch characteristics of the conveying force when the applied voltage is constant at ±2 kV p-p, and Fig. 26 shows the experimental values of the pitch characteristics of the conveying force when the applied voltage is constant at ±2 kV p-p. Figure 27 shows the experimental values of the applied voltage characteristics of the conveying force when the pitch of the charge pattern is constant at 2.4 horses, and Figure 28 shows the experimental values of the applied voltage characteristics of the charge pattern when the pitch of the charge pattern is fixed at 2.4 horses.
．． The experimental values of the applied voltage characteristics of the attraction force are shown when the voltage is constant at 4 m.

As is clear from these experimental values, the pitch of the charge pattern and the applied voltage used in this example are not limited to the above-mentioned values; for example, the pitch of the charge pattern may be set to 0. The range of 5 to 10 doses is sufficient, and the applied voltage may be ±1 kVp-p or more.

In addition, in this example, as a high frequency AC voltage for static elimination,
Although a frequency of 2 kHz and an applied voltage of ±2 kVp-p are used, any value may be used for each of these values as long as the static elimination effect can be obtained.

As described above, according to the page turning method in this embodiment, there is no need to perform any modification on the paper (book manuscript 92) to be attracted to the turning conveyor belt 8, so that the sheets are not attracted to each other by static electricity. Book manuscript 92 due to the occurrence of irregularities (irregularities) at the edges of the paper.
It is possible to eliminate the occurrence of page turning errors.

Further, according to this page turning method, since the place where the adsorption force is generated is near the surface of the turning conveyor belt 8, the paper that is in contact with the surface of the turning conveyor belt 8, that is, the book Sufficiently large conveying force and adsorption force act on the topmost document of the document 92 where page turning is performed, but the second and subsequent documents located below this document are These conveying forces and adsorption forces rarely act on the material.

Therefore, according to this page turning method, it is possible to reliably turn only one page, so this method is the most suitable method for turning the pages of the book manuscript 92.

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

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

First, the control means of the MFDS will be explained based on the 29th rs.

In FIG. 29, a main control board 310 controls commands and data between each board, and controls 0N of each load.
10FF timing and abnormality processing due to each sensor input,
It also performs mode switching and controls the entire MFDS.

Further, the main control board 310 is configured to communicate with connected devices, set communication protocols, and handle each connected device individually.

For example, if the printer 300 is connected as the output device, its pixel density, processing speed, availability of double-sided printing, availability of backside paper ejection, etc. can be checked to determine the corresponding mode selection area. It is composed of

Furthermore, this main control board 310 is provided with two systems of interfaces to external devices, corresponding to each mode.

In the main control board 310 of this embodiment, commands between each board are carried out by serial communication, separated from the data and control lines, and commands can be sent and received even while the data is being output.

Here, if you want to increase its versatility, use GP I B, Centronics, 5C8 as the interface.
By setting one or both of I, etc., the display, optical disk device, HD
Data can be stored in storage devices such as D and FDD without using a special interface.

On the other hand, in FIG. 29, a flip conveyor belt drive control board 311 controls a flip conveyor belt drive motor 61.

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

Here, the turning conveyor belt drive motor 61 detects the speed of the turning conveyor belt 8 by feedback of encoder pulses generated by an encoder integrally attached to the turning conveyor belt drive motor 61, and controls the speed position and corrects the turning conveyor belt 8. Performing reverse operation.

On the other hand, the turning unit drive motor 6o detects the position of the turning roller 2 by feedback of encoder pulses generated by the encoder 152 attached to the turning roller 2, and performs speed position control and forward/reverse operation. There is.

In addition, these turning conveyor belt suspicious movement control board 311
, and the turning unit drive control board 312 are each connected to the main control board 310, and each sends and receives commands to and from the main control board 310 by serial communication.

The operation display board 313 displays keys for setting the number of print positions, variable magnification, number of pages to be turned, each mode, etc., displays for these keys, error displays, turning status displays, and displays for each mode. Displays information such as how to set the original.

2. In the mode display, the connected device (printer 3
00), or if an impossible mode is selected, an error message is displayed.

For example, if a printer that cannot print on both sides is connected, but the duplex mode selection key 612 is pressed manually, 'The connected printer cannot print on both sides'.
An error message such as this will be displayed.

Further, reading of the original is started by pressing the start key 600 on the operation display board 313.

Furthermore, the operation display board 313 and the main control board 310 transmit and receive commands or data through serial communication.

The first image processing board 314 has a function of generating a drive clock for the Si equal-magnification sensor 315 (hereinafter referred to as the first CCD 315) built in the first reading sensor unit 9, and It has a built-in function to take the 0N10FF timing of the first LED 316 and amplifies the output of the first ccD 315.
It has a function of A/D converting this output and performing image processing.

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

This first image processing board 314 is the main control board 3
10, and sends and receives data and commands to and from this main control board 310.

The second image processing board 317 is similar to the first image processing board 314 described above, and the second image processing board 317 includes the second reading sensor unit 14 (
The function of generating the drive clock of the second COD 318 built in the first reading sensor unit 9) and the 0N10F of the second LED 319 built in the second reading sensor unit 14 as well.
It has a function of taking F timing, and a function of amplifying the output of the second CCD 318 and performing image processing by A/D converting this output.

In addition, in this second image processing board 317, similarly to the first image processing board 314, shading correction, MTF
Correction, main scanning magnification, text processing, photo processing, and negative/
Image processing such as positive inversion is performed.

Further, the second image processing board 317 is connected to the main control board 310 and sends and receives data and commands to and from the main control board 310.

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

Similarly to the first high-voltage power supply 320, the second high-voltage power supply 321 is a power supply that applies a high-voltage AC voltage to the second bias roller 11, and has two frequencies, one for attracting X documents and one for removing static electricity from the belt. The switching of each frequency is performed by switching signals from two output ports of the main control board 310.

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

Also, various sensors 25, 26, 27° 28, 29.3 connected to each input port of the main control board 310
0.31, 32, 33, and 34 perform mode switching, timing detection, abnormality detection, etc., as described in the mechanism explanation above, and provide the respective detection signals to the main control board 310. .

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

The operation mode of MFDS is broadly divided into two modes.

The first operation mode 1 of this MFDS is a book document reading mode that performs an automatic page turning reading operation of a book document as shown in FIG. 30, and the second operation mode is a book document reading mode as shown in FIG. , is a sheet original reading mode in which sheet originals are automatically fed and read.

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

That is, as shown in FIG. 30, the book manuscript reading mode includes an automatic book size recognition mode in which the book size of the book manuscript 92 is automatically recognized, and a book size recognition mode in which the book size is manually specified using keys on the operation display board 313. There is a size key manual mode.

In both of these automatic book size recognition mode and book size key manual mode, automatic page turning reading operation for the book document 92 is performed using a spread reading mode in which the book document 92 is set with the document side facing upward. will be held.

Furthermore, this book Ha reading mode is related to an output device (particularly a printer) as its reading method.
A two-page spread continuous reading mode in which two pages of left and right pages of a spread book manuscript 92 are continuously read and the images of these two pages are printed on one sheet of transfer paper, and a double-sided image forming function are available. Using a printer with a 2-page spread, the following 2 pages of the left and right pages of the spread book manuscript 92 are printed on the back side of a sheet of transfer paper on which the original images of the 2 left and right pages are printed in the above-mentioned 2-page spread continuous reading mode. The double-sided mode of this two-page spread continuous reading mode, in which read images are continuously formed, and the one-page spread mode, in which the reading operation is performed by dividing the left and right pages of the spread book manuscript 92 one page at a time. The double-sided image forming function of the printer described above is used to print a spread book manuscript 9 on the back side of the transfer paper printed in the edge reading mode and the edge reading mode of one page of the two-page spread.
The present invention has a double-sided mode, which is a one-page reading mode in which the original images of the next left and right pages of the second page are divided and formed one page at a time.

On the other hand, in the sheet document reading mode, as shown in FIG. 31, the sheet document 200 is automatically fed and ejected while the position of the first reading sensor unit 9 or the second reading sensor unit 14 is fixed. The first reading sensor unit of the page-turning reading unit 1 is set in the sheet original through mode in which the original image is read in one sheet through mode while moving the original, and the first reading sensor unit of the page turning reading unit 1 when the sheet original 200 is set (fixed) on the original placing surface 116. 9 is repeatedly moved back and forth (scanning) to read the sheet document 200, and in the sheet document scan mode, when the document cannot be set (or not set) using the automatic document feed function (ADF), manually There is a manual opening/closing mode for sheet documents to be set.

Also, in the sheet original through mode, the sheet original 200
There is a single-sided reading mode in which images on only one side of the sheet document 200 are read, and a double-sided reading remote in which the first reading sensor unit 9 and the second reading sensor unit 14 read images on both sides of the sheet document 200 simultaneously.

Furthermore, in this double-sided reading mode, the first reading sensor unit 9 and the second reading sensor unit 14 are
There is a same-position reading mode in which the original image is read by placing them at the same position facing each other, and a same-position reading mode in which the first reading sensor unit 9 and the second reading sensor unit 14 are placed in different positions shifted from each other to read the original image. It also has a separate position reading mode for reading.

Above, we have explained the operation modes of MFDS, but
Next, switching between the individual modes described above will be explained with reference to FIG. 32.

In FIG. 32, when the main power of the MFDS is turned on, the main control board 310 shown in FIG. , the second image processing board 317 are each reset and initialized.

After that, the connection of the connected device such as the printer 300 is checked, and the mode compatible with this connected device is displayed.
It accepts the input of each key to set the number of prints, variable magnification, number of pages to be turned, and each mode.

Also, during this time, the book manuscript 92 or the sheet manuscript 20
A set of 0 is performed.

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

Also, here, the oven key 6 on the operation display board 313
When the transport section 19 of the MFDS is opened by 20 and the book document 92 is set in the center reference positioning section 24 of the document placement surface 116 in a spread-open state, the book document sensor 27 is turned on. Ru.

These sheet document sensor 25 and book document sensor 27
The document image reading mode is switched as shown in FIG. 32 in accordance with the 0N10FF state and the print position number indicating the number of prints of the sheet document 200 inputted using the numeric keypad 602 of the operation display board 313.

That is, here, the book document sensor 27 is OFF, the sheet document sensor 25 is ON, and the print position is "
1, the mode transitions to the sheet document through mode.

Further, here, if the book document sensor 27 is OFF, the sheet document sensor 25 is ON, and the number of print positions is "2" or more, a transition is made to the sheet document scan mode.

Further, when both the book document sensor 27 and the sheet document sensor 25 are OFF, the sheet document manual r
Transition to jII closed mode.

Further, when the book original sensor 27 is ON and the sheet original sensor 25 is OFF, the mode changes to the book original reading mode.

Furthermore, here, if both the book document sensor 27 and the sheet document sensor 25 are ON, the abnormality processing 1
(Turning on the warning buzzer and displaying an error) to alert the user, and then transitions to the book document reading mode.

After entering each selected mode subroutine in this way, the start key 6 on the operation display board 313 is pressed.
If 00 is not pressed, the process returns to the step of accepting manual key input without executing the image reading operation.

Next, the operation of each mode mentioned above will be explained.

First, the book document reading mode will be described with reference to FIG. 33.

When the MFDS mode enters the book document reading mode, the scan cutoff sensor 34 turns ON10 F F
A check is performed.

As shown in FIG. 4, this scan cutoff sensor 34 detects the upper limit detection section 76 when the page turning reading unit l rises to its upper limit position, and
N is given.

As described above, the page turning reading unit 1 is moved up and down according to the thickness of the book document 92 placed on the document placement surface 116.

As the page turning reading unit 1 rises, that is, the thickness of the book document 92 increases.

The tension of the turning conveyor belt 8 that drives this increases.

Therefore, if the tension of this turning conveyor belt 8 becomes too high, that is, if the book document 92 is too thick and the page turning reading unit 1 rises too much, this tension acts as a brake, causing the page turning reading unit 1 to scan. become unable to do so.

The scan cutoff sensor 34 detects the level at which the book document 92 is so thick that the page turning reading unit 1 cannot scan it.

When this scan cutoff sensor 34 is ON,
Perform abnormality processing 2 (turning on the warning buzzer and displaying the error message "Book document is too thick") to prevent the user from forcibly closing the transport section 19 and damaging the transport section 19. There is.

Here, if the thickness of the book document 92 is less than the adaptation level, the user closes the transport section 19, thereby turning on the transport section lock sensor 31.

At this time, if the transport section 19 remains open, that is, the transport section lock sensor 31 remains OFF, the abnormality processing 3
(The warning buzzer turns on and the message ``Please close the transport section'' is displayed).

Then, when the conveying section 19 is closed, the book size upper limit sensor 33 is checked for 0N10FF.

Here, the book size upper limit sensor 33 detects the book original 9
If the book size of 2 is detected and turned on, that is, the book size of the book original 92 set on the original placing surface 116 exceeds the reading area of the page turning reading unit 1 and is an unreadable book. In the case of the size, abnormality processing 4 (turning on the warning buzzer and displaying the message ``Book document size is too large'') is performed.

After that, after checking the number of print positions, variable magnification, and number of pages to be turned, the prescan flag is set if the automatic book size recognition mode is selected.
If the mode is not the automatic book size recognition mode, the mode is set to the book size input mode, and the reading area of the book document 92 is determined by manually operating a predetermined key on the operation display board 313 to set the book size.

When the start key 600 is pressed, the transport unit locking device 140 is activated, and the transport unit 19 is locked to the document table 18.

This prevents the user from accidentally opening the conveying section 19 and damaging the book original 92 during the page turning operation by the page turning reading unit 1.

Next, after the transport unit locking device 140 is activated.

If the prescan flag described above 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 this pre-scan operation, the connected device (printer 3oO
) until it is ready.

Then, when this connected device (printer 300) is ready, when it receives a reading start signal output from the connected device (printer 300), the page turning reading unit 1 is driven to read the book as described above. The operation of reading the original image of the original 92 is started.

The reading operation by the page turning reading unit 1 is performed a number of times according to the number of print positions set previously.
It is done repeatedly.

When the predetermined number of reading operations are completed, the page turning operation is performed by the page turning reading unit 1, as described above, in order to read the next page of the original image.

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

Then, when the page turning operation for the preset last page to be turned is completed and the reading operation for the last read page is completed a predetermined number of times, the page turning operation is performed without performing the page turning operation for the last page to be read. Unit 1 is returned to its home position 511-A, and this book document reading mote routine is returned.

The basic operation of the book document reading mode is as described in the 33rd section above.
The flowchart shown in the figure is as described above during this mode. The two-page spread continuous reading mode and its duplex mode, and the one-page spread reading mode and its duplex mode are input modes that are accepted when the keys are manually set in FIG. 32.

For each of these input modes, press the start key 600.
This will be explained with reference to a timing chart showing the progress after is pressed.

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

In FIG. 34, when the start key 600 of the operation display board 313 is pressed and the reading start switch SW is turned on, a shutter (not shown) in the first reading sensor unit 9 is closed.

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

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

The page turning reading unit 1 is started by a normal rotation start signal sent from the main control board 310 to the turning unit parking control board 312.

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

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

By reading the pre-scan of the page-turning reading unit 1, the edges of the spread book document 92 are detected by image processing, and the output of the encoder 152 attached to the turning roller 2 at this time is counted. , yK The book size of the book manuscript 92 set on the document placement surface 116 is recognized, and the reading area of the manuscript image of the page-turning reading unit 1 and the page-turning area are determined.

In this way, this MFDS is configured such that the book original 92 is set with the center of the original placing surface 116 as a reference, so that the set book original 92
By detecting only the left end of the page, it is possible to calculate the reading area of the document image of the page turning reading unit 1 and the page turning area.

Therefore, in this MFDS, when detecting the book size of the book document 92, there is no need to pre-scan the entire surface of the page-turning reading unit 1, and the page-turning reading unit 1 only needs to perform a short pre-scan to place the book on the document placement surface 116. The book size of the placed book original 92 can be detected.

As a result, during pre-scanning by the page-turning reading unit 1, the reading start page of the book document 92 will not be erroneously turned over.

The book size data of this book manuscript 92 is transmitted from the main control board 310 to the printer 3 as an externally connected device.
On the other hand, while this book size detection is completed and the book size data is being sent to the printer 300, the main control board 310 sends a message to the turning unit movement control board 312 to drive the turning unit. A reversal signal is applied to reverse the motor 60, causing the page turning reading unit 1 to move to its home position 1 at a speed Vr.
- It is moved back towards A.

Note that by coloring the document placement surface 116 of the document table 18 of this MFDS in a chromatic color, such as yellow, which is not often used for book manuscripts, this document can be placed easily. Placement surface 116 and book manuscript 92
Since it is possible to improve the accuracy of region identification with the reading region of the original image, the book size can be detected more accurately during the above-mentioned pre-scanning, and the reliability of the book size data is improved.

Furthermore, if the document placement surface 116 is colored in a neutral color such as gray, the first CCD 315 of the first reading sensor unit 9 can be used for area identification during pre-scanning without using a color sensor. becomes possible.

After the above pre-scan is completed and the page turning reading unit 1 is evacuated to the home 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, this causes the main control board 310 to transfer the turning unit drive control board 312.
A normal rotation signal is applied to rotate the turning unit drive motor 60 in the normal direction, and the normal rotation operation of the page turning and reading unit 1 is started.

As mentioned above, this page turning reading unit 1 has the following features:
By feeding back the output of the encoder 152 of the turning roller 2, the turning roller 2 is moved along the document surface of the book document 92 toward its end position 1-C while being controlled at a constant speed Vf. .

At this time, the LED 31 of the first reading sensor unit 9
6 has already been lit, 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, the book manuscript 92 set spread-open on the manuscript placement surface 116 has a severe warpage near the binding part (part of the center). It becomes difficult to read the manuscript information accurately.

Further, normally, manuscript information such as characters and images is not formed near the binding portion of the book manuscript 92.

Therefore, in this MFDS, as shown in FIG. 34, the first CCD 3
The reading 5FGATE of No. 15 is turned off, and the reading of document information near this binding section is masked.

As described above, the mask area at the time of initial setting of this document information is +
This mask area is set to -Low, but the setting value of this mask area can be changed manually by pressing the book binding mask area setting key 608 on the operation display board 313. , it is now possible to handle book manuscripts with special bindings.

By the way, the first reading sensor unit 9 reads the document information of the book document 92 until the page turning reading unit 1 reaches its end position 1-C. When reaching near the center of , the first high voltage power supply 320 is turned on at frequency f1.

As a result, the above-described charge pattern is formed on the portion of the turning conveyor belt 8 that comes into contact with the right page of the book original 92.

As described above, this turning conveyor belt 8 is not driven when the page turning reading unit 1 is being driven, and functions to press down the book document 92.

In this way, the page turning reading unit 1 reaches its end position! 1-C and the reading of the document information up to the reading area at the right end of the book document 92 is completed, the output of the first high-voltage power supply 320 is turned off, and the turning unit drive control board from the main control board 310 is turned off. A turning signal is given to 312, and the book manuscript 9 is read by the page turning reading unit 1.
The 20th page turning operation is started.

At this time, if the document surface read by the first reading sensor unit 9 corresponds to the last read page of the book document 92 set in advance, no turning signal is output from the main control board 310. After the page-turning reading unit 1 finishes reading the last read page of the book document 92, it is returned to its home position 1-A without performing the above-described page-turning operation.

During the page turning operation of the book original 92, the reverse operation of the page turning reading unit 1 is slow-started until the page turning resensor 29 is turned on, and the book electrostatically attracted onto the turning conveyor belt 8 is rotated. Manuscript 9
Page 2 (the right page in FIG. 1) that has been read is led into the page storage section 7.

Then, the page turning reading unit 1 is further moved back toward its home position 1-A, and up to the center part of the page of the book document 92 that has been read is turned over into the page storage section 7.

In addition, during the page turning operation of the page turning reading unit 1, the first high voltage power supply 320
is turned on at frequency f2.

In this way, the page of the book manuscript 92 that has been turned into the page storage section 7 of the page-turning reading unit 1 is read after the page-turning reading unit 1 passes a part of the center of the book manuscript 92. While reaching the end position 1-C, the page is ejected from the page storage section 7, and the page turning operation is completed.

Page turning reading unit 1 when this page is ejected
The return speed V r m is set so that it is larger than the speed Vf when reading the document, that is,
It is set so that r m > V f, and this page turning operation is made faster.

The state of this series of page turning operations is detected by a page turning resensor 29.

That is, this MFDS determines whether the page turning resensor 29 at each position of the page turning reading unit 1 is turned on or off.
The presence or absence of an abnormality is detected by checking the FF, and if there is an abnormality, an abnormality processing operation is executed.

This abnormal processing operation includes activating a warning buzzer and, for example, if the document page cannot be turned into the page storage section 7, a message saying "page 9 cannot be turned" is displayed, and the document page turned over into the page storage section 7 is If the paper cannot be ejected, a message such as "Unable to stack one page" will be displayed on the operation display board 3.
13, and furthermore, this page turning operation is stopped.

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

Hereinafter, reading of the second and subsequent pages of the book manuscript 92 and page turning operations are sequentially started in response to a transfer request signal from the printer 300, and the same reading operations and page turning operations as described above are performed. This process is repeated until the preset final page to be read is reached.

Here, in the timing chart of FIG. 34, when the number of print positions of the original is set to "1", that is, each read page of the book original 92 is read once, and the page that has been read is turned over. As shown above, the number of print positions for this document is "2".
'', when the first document reading operation by the first reading sensor unit 9 is completed, the main control board 310 sends a turning signal to the turning unit drive control board 312 instead of the turning signal. A reverse signal is transmitted to the page turning reading unit 1, and the page turning reading unit 1 is returned toward its home position 111-A at a speed Vr. The second original reading operation is started.

Then, the document reading operation of the page turning reading unit 1 is repeatedly executed as many times as the number of document print positions set in advance, and when the number of times of this operation matches the number of print positions, the document is read 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 above-described page turning operation is executed.

Hereinafter, the reading of the second and subsequent pages of the book manuscript 92 and the page turning operation are started repeatedly in response to a transfer request signal from the printer 300, and are repeated a number of times according to the number of print positions as described above. The reading operation and page turning operation are repeatedly performed until a preset final read page is reached.

In addition, if the print magnification key 614 is set to change the magnification of the read original image, the scan speed Vf of the first reading sensor unit 9
is varied to a speed corresponding to the magnification ratio, so that the magnification of this original image in the sub-scanning direction is changed, and the first image processing board 314 performs magnification processing of this original image in the main scanning direction. will be done.

On the other hand, in the double-sided mode of the two-page spread continuous reading mode as described above, in order for the printer 300 to print both sides of the original image, the timing at which the transfer request signal is transmitted from the printer 300 to the main control board 310 is delayed. The difference is that there is a slight delay, but other operations are the same as in the two-page spread continuous reading mode described above.

Next, with reference to FIG. 35, the one-page spread reading mode will be described.

This two-page spread reading mode is a mode in which the left page and right page of the spread book document 92 are read separately to form one image, and each of these images is printed on separate transfer paper. , a mode in which printing is performed on both sides of a single sheet of transfer paper (duplex mode of this one-page spread reading mode).

In this mode, either the operation of reading from the left page of the book manuscript 92 or the operation of reading from the right page is manually selected and set using the reading start page selection key 603 on the operation display board 313. can do.

FIG. 35 shows a timing chart when reading starts from the left page of the book manuscript 92.

The operation of this one-page spread reading mode is approximately the same as the operation of the double-sided mode of the two-page spread continuous reading mode described above. However, a transfer request signal to the main control board 310 is transmitted for each page, and this causes the page turning reading unit 1 to move at a constant speed from the left page to the right page of the book document 92. (scanned).

FIG. 36 shows a timing chart when reading is set to start from the right page of the book original 92 in this one-page spread reading mode.

As is clear from this timing chart, when reading starts from the right page of the book manuscript 92,
The moving speed of the page turning reading unit 1 for the left page, which is not read, of the book original 92 is programmed to be faster than the scanning speed Vf of the first reading sensor unit 9 for the right page. Efforts are being made to shorten the reading time, that is, to improve the performance of the reading function.

Further, in this one-page spread reading mode, if a page is set to be skipped without being scanned using the reading skip page setting key 618.

The page turning reading unit 1 for this reading skip page is moved at a speed faster than the scanning speed Vf of the first reading sensor unit 9 when reading, so that the turning operation for this reading skip page is immediately executed. (timing chart not shown).

By the way, in general, as shown in FIGS. 35 and 36, there are few printers in which the printer 300 can continuously request a transfer request signal from the main control board 310 in a normal state.

Therefore, when using such a general printer to perform this single-page spread reading mode, it is possible to achieve this by feeding two sheets of transfer paper in a stacked manner on the printer side. can be done.

In addition, if it is necessary to provide a certain distance between these two sheets of transfer paper due to the registration between the transfer paper and the photosensitive drum, the left page of the book manuscript 92 may be This is achieved by transmitting the image data on the right side of the book manuscript 92 to the printer as is, and delaying the transfer timing of the image data on the right page side of the book manuscript 92 to the printer by a time corresponding to the distance between these transfer sheets through a delay memory. can be done.

A block diagram of an example of the latter case is shown in FIG. 37, and a timing chart thereof is shown in FIG. 38. In this example, each internal gate A and H on the main control board 310 allows The image data that is output to the printer via the delay memory is delayed by a time Td compared to the image data that is output as is to the printer.

Next, the double-sided mode in this one-page spread reading mode will be explained.

First, a case will be described in which image data of two left and right pages of a spread-open book document 92 are printed on the front and back sides of one sheet of transfer paper.

In this case, it is necessary to reversely convey the transfer paper on the printer 300 side, so it takes some time after printing the image data of the left page and starting printing the image data of the right page. is multiplied.

Therefore, in this mode, when the page turning reading unit 1 finishes reading the left page of the book document 92 and reaches the vicinity of the binding section, 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 reversal conveyance of this transfer paper are completed, and the printer 300 side
When a transfer request signal is issued from 0 to the main control board 310, the page turning reading unit 1, which had been stopped, is driven again at the predetermined scanning speed Vf, and the book document 9 is
The right page of 2 is read, the image data of this right page is transferred to the printer 300, and this right page image is printed on the back side of the transfer paper with the left page image printed on the front side, resulting in double-sided printing. will be carried out.

A timing chart at this time is shown in FIG.

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

In this mode, when starting reading from the left page of the book document 92, as described above, the printer 300 is instructed to continuously feed two sheets,
The transfer paper with the left page image printed on it is ejected as is, while the transfer paper with the right page image printed on it is reversed and conveyed.

Preparations are made for printing the left page image of the next page of the book manuscript 92 on the back side.

During this time, on the MFDS side, a page-turning operation is performed on the original page that has been read.

When this page turning operation on the MFDS side is completed,
A reading operation for the next page is executed, and the read left page image is printed on the back side of the transfer sheet on which the right page image was previously printed and conveyed in reverse, and is discharged.

Further, the right page image read at this time is printed on newly fed transfer paper.

This transfer paper, like the previous transfer paper, is reversed and conveyed,
Preparations are made to print the left page image of the next page of the book manuscript 92 on the back side.

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

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

Here, setting of a book document in the double-page spread reading mode will be described.

In the connected device check in FIG. 29, the printer 300
If the backside paper can be ejected, the following display will be displayed.

In other words, ``If the book manuscript is written horizontally (left-handed), open the first page you want to read and set it face up.

``If the book manuscript is written vertically (right-handed), open the first page you want to read and set it upside down.

, the respective setting methods for horizontal writing and vertical writing of the book manuscript are instructed.

On the other hand, in the connected device check of FIG. 29, if the printer 300 is capable of only surface ejection, the following display is displayed.

In other words, ``If the book manuscript is written horizontally (left-opening), open the last page you want to read and set it upside down.''If the book manuscript is written vertically (right-opening), set the last page you want to read with the last page facing up. and set it facing upward.

′ indicates how to set the book manuscript horizontally and vertically.

In this MFDS, by setting the book original 92 in accordance with the above-mentioned instructions, the pages of the ejected transfer paper can be aligned regardless of the function of the printer 300 connected thereto.

In addition, there are two methods for inputting the number of pages to be turned in this MFDS using manual keys on the operation display board 313, and the user can select one of these input methods according to his/her preference. It has become.

One of these input methods is to press the read total page setting key 60.
6, etc., to set the total number of pages you want to read.Another input method is to use the reading start page setting key 604, the reading last page setting key 605, etc. to set the first page you want to read, This is a method of inputting the last page.

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 times the page is turned by the page-turning reading unit 1 can be calculated accurately.

Hereinafter, a method of calculating the number of page turns in each of the above-mentioned methods will be explained.

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

Here, if the total number of pages to be read is X and the number of pages to be turned is M, then when reading from the left page.

(X-2)/2=M over 10...■ When reading from the left page, (X-1)/2=M over 10...■ From these formulas, the value of M can be calculated. By calculating, the number of turns can be obtained.

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

Here, type Y for the first page you want to read and Z for the last page.
If the total number of pages you want to read is X, then I can do it.

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

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

As shown in FIG. 31, this sheet document reading mode includes a sheet document through mode, a sheet document scan mode, and a sheet document manual opening/closing mode.

First, the sheet document through mode will be explained.

This sheet document through mode includes a single-sided document reading mode and a double-sided document reading mode, and this double-sided document reading mode includes a same-position reading mode and a different-position reading mode.

Selection of these modes is performed as shown in FIG.

First, in the single-sided original reading mode, FIG. 41 and
As shown in FIG. 42, when a sheet original 200 is set face down on the sheet original tray 94 and the start key 600 is pressed in this state, first, the power of the turning conveyance belt drive motor 61 is turned on and the sheet original 200 is set face down on the sheet original tray 94. The moving roller 12 is rotated, and the flipping conveyor 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 paper is fed from the second paper feed pulley 130 attached to the first belt support roller 97 via the paper feed drive belt 127. The paper feed roller 96 is rotated,
Sheet original 200 is conveyed toward paper feed separation pad 95 .

This paper feed separation pad 95 separates the lowest one sheet original 200 from other sheet originals, and
While being guided by the conveyance guide 108 and the second conveyance guide 109, the sheet is conveyed to a position where it contacts the turn-over conveyance belt 8.

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

On the other hand, during this time, along with the rotation of the turning conveyor belt 8, a high AC voltage is applied to the second bias roller 11 from the AC power supply 35, and a striped charge pattern is formed on the turning conveyor belt 8.

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

At this time, the linear speed of the turning conveyor belt 8 is 3 at the same magnification.
60 Kaku/S, and when changing the magnification, it changes according to the set magnification.

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

After this reading, the sheet original 200 is transferred to the third conveyance guide 110 and the fourth opposing roller 103. Fifth opposing roller 104. Sixth opposing roller 105. The paper is pinched and conveyed by the seventh opposing roller 106 and discharged onto the paper discharge tray 23 from the paper discharge port 117 .

In the third conveyance guide 110 near this paper ejection port 117,
A paper discharge sensor 28 is attached to detect a paper discharge jam of the sheet document 200 to be discharged.

When the reading operation of the first sheet original 200 is completed, the paper feed clutch 128 is turned on again at a predetermined paper feeding timing, and the second sheet original 200 is read.
is fed, and a reading operation similar to that described above is performed.

In this way, the sheet originals 200 set on the sheet original tray 94 are sequentially fed and read, and when the last (top) sheet original 200 is fed and the sheet original sensor 25 is turned off, the first sheet original 200 is read. 2 bias roller 11
After the power source of the MFDS is switched to a high-frequency AC voltage, the charge pattern on the turning conveyor belt 8 is neutralized, and this final sheet document 200 is ejected, all operations of the MFDS are stopped.

The above-mentioned reading operation is an operation when a printer having a back side ejection function is connected to this MFDS, and thereby the sheet original 200 and the printed transfer paper are ejected in page alignment.

Here, if the printer connected to this MFDS has only a front side ejection function, set the sheet original 200 face up on the sheet original tray 94 and use the second reading sensor unit 14 to By reading this sheet original 200, the sheet original 200 is
00 and printed transfer paper are page-aligned and ejected.

Further, the other operations when a printer having the front side paper ejection function is connected are the same as when a printer having the back side paper ejection function is connected.

Next, the double-sided document reading mode in this sheet document through mode will be explained.

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

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

First, the basic operation of the same-position reading mode in this double-sided original reading mode is the same as that of the single-sided original reading mode, as shown in FIGS. 43 and 44, but in this mode, page turning Reading unit 1
is located at the home position 1-A, which is the same position as the second reading sensor unit 14 on the side of the document table 18, and the document information on both the front and back sides of the sheet document 200 is read from these positions. 1 reading sensor unit 9
, and the second reading sensor unit 14 simultaneously and in parallel.

On the other hand, the basic operation of the alternate position reading mode in this double-sided original reading mode is the same as the one-sided original reading mode, as shown in FIGS. 45 and 46, but in this mode, page turning reading and Unit 1 is located at its end position 1-C.

As is clear here, in this separate position reading mode, the distance between the reading positions of the first reading sensor unit 9 and the second reading sensor unit 14 is larger than the length of the maximum size document. Document information on both the front and back sides of the sheet document 2000 read by the first reading sensor unit 9 and the second reading sensor unit 14 is output in chronological order.

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

In this sheet scan mode, Fig. 47 and Fig. 4
As shown in FIG. 8, a sheet original 200 is set facing upward on the sheet original tray 94, and when the start key 600 is pressed in this state, first, the power of the turning conveyor belt drive motor 61 is turned on, and the drive roller 12 is rotated, and the turning conveyor 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 paper is fed from the second paper feed pulley 130 attached to the first belt support roller 97 via the paper feed drive belt 127. The paper feed roller 96 is rotated,
Sheet original 200 is conveyed toward paper feed separation pad 95 .

This paper feed separation pad 95 separates the lowest one sheet original 200 from other sheet originals, and
While being guided by the conveyance guide 108 and the second conveyance guide 109, the sheet is conveyed to a position where it contacts the turn-over conveyance belt 8.

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

On the other hand, during this time, along with the rotation of the turning conveyor belt 8, a high AC voltage is applied to the second bias roller 11 from the AC power supply 35, and a striped charge pattern is formed on the turning conveyor belt 8.

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

The linear speed of the turning conveyor belt 8 at this time is 360 +w
/s, and when the leading edge of the sheet document 200 reaches the home position 1-A, the rotation of the turning conveyor belt 8 is stopped.

On the other hand, in this mode, the page turning reading unit 1 is located at its home position 1-A, and after the rotation of the turning conveyor belt 8 is stopped, the page turning reading unit 1 is moved to the turning unit drive motor 60. The sheet original 20 conveyed by the turning conveyor belt 8 is moved by the first reading sensor unit 9 toward the end position 1-C.
0 original information is read sequentially (pixel density is 400d)
pi).

When reading this document information, the first bias roller 3
Then, a high frequency AC voltage is applied by the first high voltage power supply 320, and the charge pattern formed on the turning conveyor belt 8 is neutralized.

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

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

Also, when the page turning reading unit 1 returns, the first reading sensor unit 9 reads the sheet document 200.
At the same time, 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 conveyor belt 8. The paper is turned over and is attracted to the conveyor belt 8 and fixed.

After the above-described operation is repeated the set number of times, the turning conveyor belt drive motor 61 is turned on, the turning conveyor belt 8 is rotated, and the sheet document 200 that has been read is delivered to the paper ejection port. 117 to paper output tray 2
The paper is ejected onto 3.

In the third conveyance guide 110 near this paper ejection port 117,
A paper discharge sensor 28 is attached to detect a paper discharge jam of the sheet document 200 to be discharged.

When the reading operation of the first sheet original 200 is completed, the paper feed clutch 128 is turned on again at a predetermined paper feeding timing, and the second sheet original 200 is read.
is fed, and a reading operation similar to that described above is performed.

In this way, the sheet originals 200 set on the sheet original tray 94 are sequentially fed and read, and when the last (top) sheet original 200 is fed and the sheet original sensor 25 is turned off, the first sheet original 200 is read. 2 bias roller 11
After the power source of the MF is switched to the high-frequency AC voltage of the second high-voltage power source 321, the charge pattern of the turning conveyor belt 8 is neutralized, and this final sheet document 200 is ejected, the MF
All operations of the DS are stopped.

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

As shown in FIGS. 49 and 50, the operation of this sheet document manual opening/closing mode is performed by turning off each power source for the sheet conveying means and sheet suction in the sheet document scanning mode described above. In this state, the sheet originals are replaced manually by the operator.

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

FIG. 51 shows an operation control circuit for 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, and is incorporated into the turning unit translation control board 312.

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

As such a microcomputer 520, for example, μP07
Programmable interval timer 5 with 1054G
21 (hereinafter simply referred to as a timer) is connected.

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

The period of this PWM control is 50 (μ5ec), and is controlled with a resolution of 400 bits.

This timer 521 is connected to an 8 MHz oscillator 522 and is configured to receive a clock signal.

Further, the turning unit drive motor 60 is connected to the microcomputer 52.
0 through drive transistors Q1 to Q4.

That is, when transistors Q4 and Q4 are ON and transistors Q2 and Q3 are OFF, a current that rotates clockwise (CW) is supplied to the turning unit drive motor 6o, and transistors Q2 and Q3 are turned off. Q.

is ON and transistors Q,,Q, are OFF,
The turning unit drive motor 60 has one counterclockwise direction (CC
W) is supplied with a rotating current.

Here, the turning unit drive motor 60 is rotated clockwise (
When the page turning unit drive motor 60 rotates counterclockwise (CCV), the page turning reading unit 1 moves forward, and when the turning unit drive motor 60 rotates counterclockwise (CCV), the page turning reading unit 1 moves forward.
is set to return.

The rotation direction of this turning unit drive motor 60 is determined by the port PF6 of the microcomputer 520. It is controlled by the CW multiplied signal and the CCW signal respectively output from the PF7.

Further, an encoder 152 that generates pulses according to the rotation of the turning roller 2 is directly connected to the turning roller 2.

Here, the encoder 152 generates two pulse signals with different phases depending on the rotation amount and rotation direction of the turning unit drive motor 60.

One is the A-phase encoder pulse ENCA, and the other one is the A-phase encoder pulse ENCA.
One 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.

As a result, the microcomputer 520 determines that the pulse interval of the A-phase encoder pulse ENCA is determined by the internal counter of the microcomputer 520 (oscillation frequency 10 of the oscillator 525 of the microcomputer 520).
MHz).

The input signal to this counter input terminal C1 is an interrupt input, and during processing of the interrupt program, the value of the measurement data of the pulse interval of the A-phase encoder pulse ENCA is read.

Based on this data, the turning unit drive motor 6o
Calculation of the rotation speed of the motor, calculation of the motor control amount by proportional/integral control calculations, output (data loading to the timer 521), etc. are performed.

Specifically, the output of the A-phase encoder pulse ENCA is divided into 1, 1,
By dividing the frequency by 2.4.8, an interrupt input signal is provided to the counter input terminal C1.

Here, when the frequency is divided by 1, the first reading sensor unit 9
However, by one pulse of the encoder 152, it becomes 0.116
By moving m, the speed is calculated inside the microcomputer 520 according to the interrupt interval.

Then, based on the calculated velocity data, the rotor timer value is determined by proportional/integral calculation processing.

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 to detect the phase difference between the two. The rotation direction of unit drive motor 60 is determined.

That is, the rotational direction of the turning unit drive motor 60 is determined by inputting the state of the B-phase encoder pulse ENCH at the rising edge of the A-phase encoder pulse ENCA to the port of the microcomputer 520.

Next, speed control of the turning unit drive motor 6o will be explained.

The speed control of this turning unit drive motor 60 is PWM.
done by control.

First, when the page turning reading unit 1 scans the scanner,
That is, when the turning unit drive motor 60 rotates clockwise, the transistor Q□ is turned on, and the PWM output from the timer 521 turns on the gate 527.
, the transistor Q is turned on/off to create a potential difference between both terminals of the turning unit drive motor 60, and the turning unit driving 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,
Contrary to the above case, the transistor Q is turned on, and the PWM output from the timer 521 turns the transistor Q2 into 0N10FF state via the gate circuit 528, thereby creating an opposite potential difference between both terminals of the turning unit drive motor 60. is generated, and the turning unit serving motor 60 is rotated at a speed corresponding to the duty ratio of the PWM signal.

(Effects of the Invention) According to the present invention, the first fjK document reading means is arranged on the front side of the sheet document transport path and reads document information on the front side of the sheet document, and the first fjK document reading means is arranged on the back side of the sheet document transport path. Since the second document reading means that reads the document information on the back side of the sheet document has a separation distance that is greater than the length of the sheet document in the sub-scanning direction, there is no need for a storage device such as a buffer memory. , with one document transport operation (sheet through mode) of the sheet document to the document transport and placement surface,
The document information on both sides of this sheet document can be read sequentially, and this document information can be sequentially input as is to a conventional external device such as a printer.

Further, according to the present invention, the document information on both sides of the sheet document can be sequentially read without the need for a document reversing means, etc., so that the sheet document reading processing speed can be increased without damaging the sheet document. It is possible to realize a document reading device with a simple configuration that can achieve the following.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of a multi-function document scanner (MFI)S) embodying the present invention, FIG. 2 is a schematic cross-sectional view of the drive system of the MFDS, and FIG. 3 is a cross-sectional view of the drive system of the MFDS. A schematic plan view of the drive system, FIG. 4 is a perspective view of the end of the page turning reading unit in the MFDS, and FIG. 5 is a sectional view of the roller end showing the support structure of the roller constituting the page turning reading unit. 6th
The figure is a side view showing an unlocking mode of the transport section locking device in the MFDS, FIG. 7 is a side view showing a locking start operation mode of the transport section locking device, and FIG. 8 is a side view showing a locking state of the transport section locking device. FIG. 9 is a perspective view showing the external appearance of the printer equipped with the MFDS,
FIG. 10 is a perspective view showing the appearance of the printer equipped with the MFDS when the transport section is open, and FIG. 11 is a perspective view of the vicinity of the end of the first reading sensor unit disposed in the page turning reading unit. , FIG. 12 is a side view of the vicinity of the end of the first reading sensor unit, FIG. 13 is a partially enlarged sectional view showing the support structure of the end of the first reading sensor unit, and FIG. 14 is the page turning reader. A side view of the back side of the turning roller 2 of the unit, FIG. 15 is the above MF
16 is a plan view of the operation display board in the MFDS, FIG. 17 is a schematic sectional view of the printer, and FIG. 18 is a schematic sectional view of the printer. FIG. 19 is a plan view of the writing section, FIG. 19 is a diagram of the operation of the switching claw that switches the transfer paper conveyance path of the printer, FIG. 20 is a schematic sectional view of the page turning reading unit, and FIG. 21 is the first reading sensor. 22 is a schematic sectional view showing the operating mode of the MFDS, FIG. 23 is an explanatory diagram of the turning conveyor belt in the MFDS, and FIG. 24 is a diagram showing the page turning operation of the turning conveyor belt. Partial perspective view shown, second
FIG. 5 is a diagram showing the pitch characteristics of the conveying force of the flipping conveyor belt, FIG. 26 is a diagram showing the pitch characteristics of the adsorption force of the flipping conveyor belt, and FIG. 27 is a diagram showing the application of the conveying force of the flipping conveyor belt. A diagram showing the voltage characteristics; FIG. 28 is a diagram showing the applied voltage characteristics of the attraction force of the flipping conveyor belt; FIG. 29 is an electrical block diagram of the MFDS; and FIG. 30 is a book document reading mode operation of the MFDS. FIG. 31 is a mode transition diagram when the MFDS operates in the sheet original reading mode, FIG. 32 is a flowchart showing the switching operation of each of the above modes, and FIG. 33 shows the operation in the book original reading mode. FIG. 34 is a timing chart showing the operation in the two-page spread continuous reading mode in the book original reading mode; FIG. 35 is a timing chart showing the operation in the one-page spread reading mode in the book original reading mode; FIG. 36 37 is a timing chart showing the operation when the book document is set to be read from the right page in the page-separate reading mode, and FIG. The block diagram of the circuit shown in Figure 38 is shown in spread 1 above.
A timing chart showing the operation of the circuit that delays the transfer timing of data read in the page break reading mode, FIG. 39 is a timing chart showing the operation in the double-sided mode in the one-page spread reading mode, and FIG. 40 is the sheet A flowchart showing the switching operation of the sheet document through mode in the document reading mode, FIG. 41 is a flowchart showing the operation of the single-sided reading mode in the sheet document through mode, and FIG. 42 is a flowchart showing the operation of the single-sided reading mode. , FIG. 43 is a flowchart showing the operation of the same position reading mode in the sheet original through mode, FIG. 44 is a timing chart showing the operation of the same position reading mode, and FIG. 45 is a flowchart showing the operation of the same position reading mode in the sheet original through mode. Position reading mode E
FIG. 46 is a flowchart showing the operation of the separate position reading mode; FIG. 47 is a timing chart showing the operation of the separate position reading mode;
FIG. 48 is a flowchart showing the operation of the sheet original scanning mode in the sheet original reading mode, FIG. 48 is a timing chart showing the operation of the sheet original scanning mode, and FIG. 49 is a flow chart showing the operation of the sheet original scanning mode in the sheet original reading mode. FIG. 50 is a timing chart showing the operation in the sheet document manual opening/closing mode, and FIG. 51 is a scanning control circuit diagram of the page turning reading unit. A... Multi-function document scanner (MFDS), 1... Page turning reading unit, l-A... Home position, 1-C... End position, 8... Turning conveyance Belt, 9.
... Turning conveyor belt, 14... Second reading sensor unit, 24... Central reference positioning section, 52...
Turning unit drive belt, 60... Turning unit drive motor, 61... Turning conveyor belt drive motor,
92... Book manuscript, 200... Sheet manuscript, 30
0... Printer, 310... Main control board, 3
11... Turning conveyor belt translation control board, 312...
... Turning unit cantering control board, 313 ... Operation display board, 314 ... First image processing board, 317
...Second image processing board.

Claims (1)

[Claims] a first document reading means disposed on the front side of the sheet document conveyance path to read document information on the front side of the sheet document; and a second document reading means disposed on the back side of the sheet document conveyance path to read document information on the back side of the sheet document. A document reading device characterized in that the document reading means has a separation distance greater than or equal to the length of the sheet document in the sub-scanning direction, and sequentially reads document information on both sides of the sheet document in one conveyance of the sheet document. Device.