JP3344862B2 - Book manuscript reading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Recently, various book document reading apparatuses have been developed which are configured to automatically turn over the read document pages after reading the document information of the book document. In this type of book document reading apparatus, a book document is opened with the read page surface of the book document facing upward, placed on a platen, and a document is placed on the document surface of the book document placed and opened. Document reading means for reading and scanning information, and by contacting and reciprocating a page turning reading unit provided with a page turning means for turning the pages of the document, scanning for reading the document information of the book document, and 2. Description of the Related Art There is known a book document reading apparatus that separates read document pages one by one and performs page turning.

[0003]

By the way, in the conventional book document reading apparatus, for example, the surface is made of an insulating layer,
A two-layer turning belt composed of a medium-resistance material having a volume resistivity of about 10 ⁷ to 10 ⁹ Ωcm is stretched around a grounded driving roller and a driven roller. An AC voltage of ± 2 to ± 3 KV is applied to the charging roller in a state where a medium-resistance charging roller composed of hydrin rubber or the like and having a medium resistance of about 10 ⁷ to 10 ⁸ Ωcm is pressed and the turning belt is rotated. Then, a positive and a negative stripe-shaped charging pattern is formed on the turning belt, and an attraction force is generated on the surface of the turning belt by an uneven electric field, whereby the document pages are attracted to the turning belt to turn the pages. Had gone.

However, in this method, the charging cycle of the stripe-shaped charging pattern is determined by the rotation speed of the turning belt and the frequency of the applied voltage, so that the turning of the turning belt is stopped during a series of page turning operations. Each time the control is performed, such as when the sheet is moved again or again, the charge pattern formed on the turnover belt is disturbed, and there is a problem that the original page attraction force of the turnover belt varies.

[0005] Further, the charging pattern formed on the turning belt is easily affected by the surrounding temperature and humidity.
If the surface resistance drops due to the adhesion of moisture to the turning belt, the adsorption force will decrease quickly, or if the adsorbed document absorbs the moisture, the charge on the surface of the turning belt will be transmitted and escaped. However, in a high-temperature, high-humidity environment, there was a problem that the suction power of the turning belt was reduced.

Further, in the above-mentioned method, since an AC voltage is applied to the turning belt by the charging roller, if the charging cycle is short, the potential difference of the charging pattern is reduced or eliminated. The charging pattern cannot be charged in a cycle shorter than the contact length of the charging pattern. Therefore, in this method, a charging pattern can be formed only at a relatively large charging cycle (for example, 4 mm or more), and when a thin document is turned over in a low humidity environment, a large number of sheets can be formed at once. Problems such as turning over of pages occurred.

Furthermore, in the above-mentioned method, since an AC high-voltage power supply is used, it is necessary to avoid the danger of operator contact during the application of the high voltage, and it is very difficult to ensure the safety. Met.

Further, in the above-mentioned method, an AC high-voltage power supply, which is difficult to downsize compared to a DC power supply, is used, so that it is not easy to reduce the size of the apparatus.

On the other hand, in order to solve such a problem, conventionally, a page turning means as shown in FIG. 16 has been proposed. This page turning means is shown in FIG.
As shown in FIG. 7, the grounded driving roller 34, the driven roller 35, and the original page which is wound around the driving roller 34 and the driven roller 35 and stretched and positioned on the book document upper surface to attract the original page. Belts 33a and 33b for transporting the document pages in the page turning direction, and the turning belts 33a and 33b are moved from a horizontal position where the driven page 35 is moved by using the drive roller 34 as a fulcrum to lift the original page from a horizontal position where the original page is sucked. A belt moving means (not shown) for moving the original page attracting surface of 33b; a charging roller 36a having a flat outer peripheral surface arranged to be in pressure contact with the outer periphery of the turning belts 33a and 33b; Charging roller 36b having outer peripheral surface formed
And a DC power supply 70 for applying DC high voltages having different polarities to the charging rollers 36a and 36b.

Referring to FIG. 16, charging rollers 36a, 36
When the page turning reading unit moves while a high voltage is applied to the rack 56, the idle gear 57 provided on the page turning reading unit side which engages with the rack 56 with respect to the rack 56 fixedly arranged on the apparatus main body side. Are relatively moved and rotated, and the drive roller 34 is rotated in a predetermined direction via a drive gear 58 that meshes with the idle gear 57.

The rotation of the driving roller 34 rotates the turning belts 33a and 33b, and the charging rollers 36a and 36b to which a high voltage is applied are applied to the outer peripheral surfaces of the turning belts 33a and 33b by the positive (+). An electrostatic pattern in which charges and (-) charges are alternately arranged in a stripe pattern is formed.

Thus, the turning belts 33a, 33b
An attracting force due to an uneven electric field is generated on the outer peripheral surface of the turning belt 33a.
It is adsorbed on the outer peripheral surface of 33b.

However, in this method, for example, as shown in FIG. 17 (a), first, the turning belts 33a and 33b are (-) turned by a charging roller 36a having a flat outer periphery.
17B, and thereafter, as shown in FIG. 17B, the convex surface of the charging roller 36b having irregularities on the outer periphery (that is, the turning belts 33a, 33b of the charging roller 36b).
Of the turning belts 33a, 33
By charging b with (+) charges, a stripe-shaped electrostatic charge pattern in which (+) charges and (-) charges are alternately formed on the outer peripheral surfaces of the turning belts 33a and 33b. At this time, as shown in FIG. 17B, the turning belt 33 is discharged by the discharge from the side surface A of the convex portion and the bottom surface B of the concave portion of the charging roller 36b having irregularities on the outer periphery.
The charge of the (-) component on the surfaces of the a and 33b is reduced, and the charge pattern is offset to the (+) side. There was a problem that it was very difficult to control.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to make the period of the surface potential of the charging pattern always constant without being affected by the rotation speed of the turning belt. It is an object of the present invention to provide a book original reading apparatus in which a variation in a charging pattern and an attraction force of a belt and a page turning operation is stable. It is another object of the present invention to provide a book document reading apparatus that includes a charging roller that can form a more reliable charging pattern on the outer peripheral surface of a turning belt and that can perform a reliable page turning operation.

[0015]

According to the present invention, in order to solve the above-mentioned problems, according to the first aspect of the present invention, a document reading means is provided on a document surface of a book document which is spread and placed at a document reading position. And by reciprocating the page turning reading unit having the page turning means, the pages of the book document are separated one by one by the page turning means, and the page turning operation of the book document and the scanning for reading the document information are performed. In the book document reading apparatus to be performed, a drive roller and a driven roller provided in the page turning reading unit, and a document page wound on the drive roller and the driven roller and positioned on the book document upper surface to attract the document page Belt that conveys paper in the page turning direction, and the driven roller A belt moving means for moving the document page suction surface of the turning belt from a horizontal position where the document page is sucked by moving the roller to an inclined position for lifting the document page, and contacting the inside of the document suction surface of the turning belt. And a high-voltage power supply for applying a high voltage to the page suction means.
And the page suction means comprises a pair of comb-shaped conductive patterns.
Are placed on insulators facing each other.
And features.

According to a second aspect of the present invention, the turning belt is made of a dielectric material having a volume resistivity of 10 ⁸ to 10 ¹⁵ Ωcm .

In the third aspect, a dielectric having a volume resistivity of 10 ⁸ to 10 ¹⁵ Ωcm is coated on the conductive pattern,
The original page is attracted by electrostatic attraction generated on the surface of the dielectric when a DC voltage is applied to the conductive pattern. According to a fourth aspect, the high voltage power supply is a DC high voltage power supply. In claim 5, inside or outside the turning belt,
It is characterized in that a charge removing means for removing the charge applied to the turning belt is provided.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the overall configuration of a book document reading apparatus having a page turning function according to the present invention.

In FIG. 1, an original platen 13 is constructed so as to be able to be pulled out to the near side with respect to the apparatus main body, and a book original 14 is turned over while the original platen 13 is pulled out to the front of the apparatus. An original page is opened and placed on elevating tables 13a and 13b supported movably up and down with respect to the unit 15.

The elevating tables 13a and 13b make the left and right page surfaces of the spread book original 14 coplanar according to the thickness of the placed book original 14 and the difference in the page amounts of the left and right spread original pages. The right and left are independently raised and lowered so as to be positioned at the same position.

The book document 14 is placed on the elevators 13a and 13b.
After placing the document table, the document table 13 is pushed into the apparatus body.
The book document 15 slides directly below the page turning reading unit 15 which is waiting at the center of the apparatus main body.

In this state, the lifting platform drive mechanism (not shown) is operated, and each lifting platform 13 is pressed until the left and right original pages of the book document 14 are pressed against the lower surfaces of the holding sheets 37, 38.
a and 13b are independently raised.

The page turning reading unit 15 includes a document reading unit 17 and a page turning unit 18, and reciprocates along a document page surface of the book document 14 via a timing belt 19 by driving of a drive motor 22. Be moved.

At this time, the pressing sheets 37, 38 are wound by the respective winding rollers 39, 44 in the direction in which they are stretched, respectively, so as not to be tensioned or loosened with the movement of the page turning reading unit 15. Thus, the left and right original pages of the book original 14 are constantly pressed by a predetermined pressure.

FIG. 2 shows a page turning reading unit 1.
5 shows a configuration of a document reading unit 17 and a page turning unit 18 provided inside the apparatus 5. 2, when the page turning reading unit 15 scans and moves from the left end to the right end in FIG. 1, the light sources (fluorescent lamps) 30a and 30b illuminating the book original reading unit 32, the mirrors 26 and 27,
31, a lens 28, and a reading element (CCD substrate) 29
Scanning of image information on the open original page surface of the book original 14 is performed by the original reading means 17 composed of a reduction optical system constituted by the above.

The original reading means 17 of this embodiment
Is placed on the contact glass 12 in the upper portion of the apparatus main body shown in FIG. 1 by interposing the optical path switching mirror 25 waiting at the position shown by the broken line in FIG. It is also possible to read the image information of the printed sheet document (not shown). When reading the image information of the sheet document, a light source (fluorescent lamp) 24 is used as a means for illuminating the sheet document reading unit 23.
a, 24b are used.

On the other hand, the page turning reading unit 15
However, when moving from the right end to the left end in FIG. 1, the page turning means 18 performs a page turning operation of the document pages of the book document 14.

The page turning means 18 of this embodiment is similar to that of FIG.
5, a driving roller 34 and a driven roller 35 provided in the page turning reading unit 15.
And a turning belt 133 that attracts a document page wound on the drive roller 34 and the driven roller 35 and located on the upper surface of the book document 14 and transports the document page in the page turning direction. Belt moving means (not shown) for moving the driven roller 35 as a fulcrum to move the original page attraction surface of the turning belt 133 from a horizontal position for adsorbing the original page to an inclined position for lifting the original page, and a turning belt 133. Suction means 1 arranged to be in contact with the inside of the original suction surface of the document
36, and a turning belt unit including a DC high-voltage power supply 71 for applying a DC voltage to the page suction means 136.

Here, the turning belt 133 has a volume resistivity of 10 ⁸ to 10 ¹⁵ Ωcm and a thickness of 0.06 to 0.5 m mainly composed of synthetic resin, synthetic rubber or paper.
m of a dielectric material.

As shown in FIG. 4, the page adsorbing means 136 removes the surfaces of a pair of comb-teeth electrodes 136a and 136b disposed on the insulator 136d so as to face each other.
The comb-shaped electrode 136 is configured to be covered with a dielectric 136c having a volume resistivity of 10 ⁸ to 10 ¹⁵ Ωcm.
By applying a voltage to the a and 136b from the DC high-voltage power supply 71, an electric field (charge pattern) in which positive charges and negative charges are alternately arranged is generated on the surface of the dielectric 136c.

The dielectric 136 of the page suction means 136
The surface of the sheet c is in contact with the inside of the original attracting surface of the turning belt 133, so that the electric field generated on the surface of the dielectric 136c penetrates the turning belt 133, and the electric field generated on the original attracting surface of the turning belt 133. Document pages of the book document 14 can be sucked.

On the other hand, the static elimination means in this embodiment is the
As shown in FIG. 5, one end is grounded, and the other end is constituted by a static elimination brush 72 arranged so as to be in contact with the outer peripheral surface of the turning belt 133. The rotation of the turning belt 133 attracts the original page. It has a function of removing unnecessary charged potential remaining on the turning belt 133 after being transported. Here, for example, even if the drive roller 34 is formed of a shaft made of a conductive metal and a conductive rubber roller, and the shaft is grounded (grounded), the same static elimination effect as the static elimination brush 72 can be obtained.

In FIG. 5, when the page turning reading unit 15 moves from the right end side to the left end side in FIG. 1, the rack 56 arranged in parallel with the moving direction of the page turning reading unit 15 and the rack 56 An idle gear 57 pivotally supported by the page-turning reading unit 15 so as to mesh with the driving gear 58 and a drive gear 58 fixed to a support shaft of the drive roller 34, thereby turning the belt 133.
Are rotated counterclockwise at the same speed as the moving speed of the page turning reading unit 15.

Then, the page turning reading unit 1
When the predetermined width of the right page end of the book document 14 is applied to the document suction surface of the turning belt 133, a predetermined voltage is applied from the DC high-voltage power supply 71 to the page suction means 136, and the book document 14 is turned. A document page is attracted to the document attracting surface of the belt 133.

Thereafter, as shown in FIG. 5, the driven roller 35 is moved by the belt moving means with the driving roller 34 as a fulcrum, and the turning belt 133 is moved from the horizontal position where the original page is sucked to the inclined position where the original page is lifted. Is moved.

The original page thus suction-separated is
By the movement of the page turning reading unit 15, the sheet is temporarily discharged to the outside of the page turning reading unit 15 by the transport rollers 53 and 54 along the guide plate 52 while being attracted to the turning belt 133 (during this time,
The voltage application of the DC high-voltage power supply 71 to the turning belt 133 is stopped).

Thereafter, the page turning reading unit 1
When the document 5 further moves and passes through the central portion of the spread of the book document 14, the drive of the transport roller 53 is shut off, and the transport roller 53 moves the right side of the book document 14 once discharged to the outside of the page turning reading unit 15. The page is
The original is naturally discharged onto the left original page surface of the book original 14 and turned over.

Next, another embodiment of the book document reading apparatus according to the present invention will be described. The configuration of the book document reading apparatus of this embodiment is the same as that shown in FIGS. 1 to 5 except that the configuration of the turning belt used as the page turning means 18 is different as shown in FIGS. The configuration is substantially the same as the configuration of the book document reading device of the embodiment. Therefore, the description of the components and the like of the present embodiment in FIGS. 6 to 10 which are substantially the same as the configuration of the book document reading apparatus of the above embodiment will be omitted.

The turning belt 233 in this embodiment is
As shown in FIG. 8, the volume resistivity 1 formed in a loop shape
0 ^{8-10 15} consists of a sheet member made of a dielectric material [Omega] cm, the inside (inner peripheral surface), comb shape formed a pair of conductive patterns 236a, 236b
Are printed so as to face each other.

This pair of conductive patterns 236a, 23
6b are arranged so that the respective comb teeth are arranged at predetermined intervals in the circumferential direction of the turning belt 233.

On the other hand, as shown in FIG. 9, each conductive pattern 2 of the turning belt 233 is provided on both ends of the driving roller 34.
Electrodes 34a and 34b are provided at positions that come into contact with the bases (roots of the comb teeth) of 36a and 236b, respectively.

These electrodes 34a and 34b are, for example,
As shown in FIG. 9, the shaft also serves as the shafts at both ends of the drive roller 34, and a direct current high voltage is applied through a spring-shaped conductive member 60 which is disposed in electrical contact with the shafts at both ends of the drive roller 34. Each is connected to a power supply 71.

Thus, these electrodes 34a, 34b
By applying a positive voltage and a negative voltage from the DC high-voltage power supply 71, a pair of (+) and (-) striped potentials are applied to the pair of comb-shaped conductive patterns 236a and 236b. As a result, an uneven electric field is formed on the surface of the turning belt 233 to generate a page attracting force.

In FIG. 8, when the page turning reading unit 15 moves from the right end side to the left end side in FIG. 6, a rack arranged in parallel to the moving direction of the page turning reading unit 15 as in the above-described embodiment. 56
And the idle gear 57 pivotally supported by the page turning reading unit 15 so as to mesh with the rack 56 and the drive gear 58 fixed to the support shaft of the driving roller 34, thereby turning the page turning reading unit 15 It is rotated counterclockwise at the same speed as the moving speed of.

The drive roller 34 in this embodiment is the same as that shown in FIG.
As shown in FIG. 7, the roller portion is formed of an insulating member 61 having a large friction coefficient, and the shaft portions at both ends of the roller portion of the page turning reading unit 15 via a bearing 62 made of an insulating member. It is rotatably attached to the side plate 63.

The driving roller 34 in this embodiment is
As shown in FIG. 9, each of the shaft portions at both ends thereof is
The drive rollers 3 are formed integrally with the electrodes 34a and 34b so as to also serve as the drive rollers 3a and 34b.
A pair of side plates 64a, 6 of the page turning means 18 for swingably holding the driven roller 35 about the rotation center 4
4b is pivotally supported via bearings 65a and 65b made of insulating members.

As described above, when the page turning reading unit 15 moves and a predetermined width of the right page end of the book document 14 is applied to the document suction surface of the turning belt 233, the electrodes 34a and 34b DC high voltage power supply 71
, A positive voltage and a negative voltage are respectively applied to the pair of conductive patterns 236 a and 23 formed in a comb shape.
6b, (+) and (-) striped potentials are generated, an uneven electric field is formed on the surface of the turning belt 233, and a page attracting force is generated. Is adsorbed.

Thereafter, as shown in FIG. 10, the driven roller 35 is moved about the drive roller 34 as a fulcrum by a belt moving means (not shown), and is turned from the horizontal position where the original page is sucked to the inclined position where the original page is lifted. The document suction surface of the belt 233 is moved.

The original page thus suction-separated is
By the movement of the page turning reading unit 15, the sheet is temporarily discharged to the outside of the page turning reading unit 15 by the transport rollers 53 and 54 along the guide plate 52 while being attracted to the turning belt 233.
The voltage application of the DC high-voltage power supply 71 is stopped).

Thereafter, the page turning reading unit 1
When the document 5 further moves and passes through the central portion of the spread of the book document 14, the drive of the transport roller 53 is shut off, and the transport roller 53 moves the right side of the book document 14 once discharged to the outside of the page turning reading unit 15. The page is
The original is naturally discharged onto the left original page surface of the book original 14 and turned over.

Next, still another embodiment of the book document reading apparatus according to the present invention will be described. The configuration of the book document reader of this embodiment is the same as that of the conventional book document reader shown in FIG. 16 except that the configuration of the charging roller of the page turning means 18 is different as shown in FIGS. The configuration is substantially the same as the configuration. Therefore, the configuration of the book document reading apparatus of the conventional example is substantially the same as that of the conventional book document reading apparatus.
Descriptions of components and the like of this embodiment in FIGS. 11 to 15 are omitted.

The page turning means 18 of this embodiment is similar to that of FIG.
As shown in FIG. 1, a grounded driving roller 34, a driven roller 35, and the driving roller 34 and the driven roller 35
A turnover belt 33a, 33b for adsorbing the original page positioned on the upper surface of the book original and transporting the original page in the page turning direction, and a driven roller 35 with the drive roller 34 as a fulcrum. A belt moving means (not shown) for moving the original page attracting surfaces of the belts 33a and 33b from a horizontal position where the original pages are attracted to the inclined position where the original pages are lifted;
At least two charging rollers 336a, 33 each having a flat outer peripheral surface that is disposed so as to be pressed against the outer periphery of the turning belts 33a, 33b and that is covered with an insulating coating 336c.
6b, and a high-voltage power supply 70 for applying a high voltage to these charging rollers 336a and 336b.

In the present embodiment, the turning belts 33a, 33
Reference numeral 3b denotes a loop-shaped resin film having a two-layer structure, the surface layer of which is a high-resistance film, and the back surface layer of which is a low-resistance film.

Each of the turning belts 33a and 33b is shown in FIG.
As shown in (1), they are arranged in parallel, are stretched around a driving roller 34 and a driven roller 35, and are respectively rotated in the arrow directions.

The drive roller 34 is formed of a grounded metal roller coated with a conductive rubber on the surface thereof. The drive roller 34 realizes reliable driving of the turning belts 33a and 33b and grounding. The turning belts 33a and 33b are driven at a linear speed equal to the moving speed.

In this embodiment, as shown in FIG. 13A, the surface resistivity of the metal roller is 10 ⁸ Ω to 10 ¹¹ Ω.
charging roller 36a coated with a rubber of 3 cm, FIG. 13 (b)
As shown in FIG. 13C, charging rollers 336a and 336b in which the outer peripheral surface of a roller equivalent to the charging roller 36a is covered with an insulating film 336c in a stripe pattern are selectively used.

Here, as shown in FIG. 14, when two charging rollers 336a and 336b whose outer peripheral surfaces are covered in stripes with an insulating coating 336c are used in parallel, the respective charging rollers 336a and 336b are used. The spacing between the insulating portion covered by the insulating coating 336c and the conductive portion not covered by the insulating coating 336c is made equal for each charging roller, and as shown in FIGS. 13 (a) and 13 (b). The insulating portions and the conductive portions of the adjacent charging rollers are configured to be alternately arranged.

According to the present embodiment, for example, as shown in FIG.
6b and a charging roller 336a (or a charging roller 3
6a), and a DC high-voltage power supply 7
When a high voltage having a polarity different from 0 is applied, the outer peripheral surfaces of the turning belts 33a and 33b are applied as shown in FIG.
A charge pattern is formed in which (+) charges and (-) charges are alternately arranged in a stripe pattern.

Thus, the turning belts 33a, 33b
An attracting force due to an uneven electric field is generated on the outer peripheral surface of the turning belt 33a.
It is adsorbed on the outer peripheral surface of 33b.

In this way, the turning belts 33a, 33
The document page located on the upper surface of the book document 14 adsorbed on the outer peripheral surface of the document b is moved by the driven roller 35 with the driving roller 34 as a fulcrum by a belt moving means (not shown), as in the above-described embodiments. From the horizontal position where the original page is sucked to the inclined position where the original page is lifted,
The document pages are lifted by moving the document page suction surfaces of the turning belts 33a and 33b.

As shown in FIG. 14, the sucked original page is fed to a page feed roller 51 composed of a rubber roller located at the center of the driven roller 35, and a standby state shown in FIG. From the position to the page-turning position, the sheet is held by the page-turning roller 6 which is pressed against the rack, and in this state, with respect to the rack 56 fixedly arranged on the apparatus body side, the page-turning reading unit side engaged with the rack 56 The provided idle gear 57 is relatively moved and rotated, and the page turning roller 6 is engaged with a page turning drive gear 58 that meshes with the idle gear 57 and a torque limiter (not shown) provided on the page turning drive gear 58. By rotating in the direction of the arrow, only one original page at the top position is It is released.

That is, the page turning roller 6 is rotated clockwise by the rotation of the page feed roller 51 by the action of the torque limiter 59, but the turning belts 33a and 33b adsorb two or more pages. In this case, the return force of the torque limiter acts on the second and subsequent pages, and the second and subsequent pages are stopped at the nip portion of the page turning roller 6, and only one original page is removed. Conveyed.

After the page separating operation, the page turning roller 6 is retracted below the guide plate 52 (FIG. 12).
reference).

The original page thus attracted and separated is once discharged to the outside of the page turning reading unit 15 by the transport roller 53 along the guide plate 52 by the movement of the page turning reading unit 15, When the page turning reading unit 15 further moves and passes through the center of the spread of the book document 14, the drive of the transport roller 53 is shut off, and the page turning roller 6 that has returned to the standby position causes the opposite side of the book document 14. It is turned over on the original page.

[0065]

According to the present invention, since the page attraction force is obtained by the page attraction means disposed inside the turning belt, the plus and minus periods of the surface potential are always kept constant. And stable page turning with little variation in the page attraction force can be realized. Also,
Attenuation of the surface potential due to changes in the surrounding temperature environment can be made relatively small, and even when a moisture-absorbed document is adsorbed, the charge on the surface of the turning belt does not escape through the document, so there is little environmental dependency and stable You can turn pages. In addition, a pair of comb-shaped conductive
Since the pattern is arranged, the surface potential of the turning belt
Is affected by the rotation speed of the turning belt.
And always constant.
Rack can be eliminated.

In the second aspect, the turning belt is made of a dielectric material having a volume resistivity of 10 ⁸ to 10 ¹⁵ Ωcm.
The electric field generated by the page adsorbing means is well transmitted, unnecessary charging is unlikely to occur, reliable adsorption becomes possible, and stable page turning can be performed. Also, unlike the prior art, the turning belt does not need to have a special two-layer structure, so that the manufacturing of the turning belt is simple and the cost can be reduced.

According to the third aspect, since the surface of the comb-teeth electrode is covered with a dielectric material having a volume resistivity of 10 ⁸ to 10 ¹⁵ Ωcm, even if a high voltage is applied, no leak or the like occurs and high security is secured. it can. In addition, this dielectric transmits the electric field well,
Since unnecessary charging is unlikely to occur, the surface potential is less attenuated, a large attraction force can be obtained, and stable page turning can be performed. Further, since the interval between the comb-teeth electrodes determines the plus / minus cycle of the surface potential, a high potential difference can be obtained even with a relatively small pitch, a large suction force can be obtained, and stable page turning can be performed.

According to the fourth aspect, since the high voltage applied to the page adsorbing means is direct current, the security is higher and the miniaturization is easier than in the case of applying alternating current, and the entire apparatus can be miniaturized and saved. Space can be achieved. In addition, since the page attraction force can be easily adjusted by controlling the applied voltage, the range (type) of the original that can be handled and the use environment can be expanded.

According to the fifth aspect of the present invention, since the static elimination means is provided inside or outside the turning belt, even if unnecessary electrification occurs in the turning belt, the static elimination is quickly performed to reduce disturbance of the surface potential of the turning belt. Can be prevented, the suction power is stable, and the page can be turned reliably.

[0070]

[0071]

[0072]

[0073]

[0074]

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a first embodiment of a book document reading apparatus according to the present invention.

FIG. 2 is a schematic sectional view showing a configuration of a page turning reading unit according to the first embodiment of the present invention.

FIG. 3 is a schematic perspective view of a page turning means provided inside the page turning reading unit according to the first embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a page suction unit for forming a charging pattern on a turning belt of the page turning unit according to the first embodiment of the present invention.

FIG. 5 is a schematic perspective view showing a page turning operation of the page turning means in the first embodiment of the present invention.

FIG. 6 is an overall configuration diagram of a second embodiment of a book document reading apparatus according to the present invention.

FIG. 7 is a schematic sectional view showing a configuration of a page turning reading unit according to a second embodiment of the present invention.

FIG. 8 is a schematic perspective view of a page turning means provided inside a page turning reading unit according to a second embodiment of the present invention.

FIG. 9 is a schematic sectional view of a page turning means according to a second embodiment of the present invention.

FIG. 10 is a schematic perspective view showing a page turning operation of a page turning means according to a second embodiment of the present invention.

FIG. 11 shows a third example of the book document reading apparatus according to the present invention.
FIG. 2 is an overall configuration diagram of the embodiment.

FIG. 12 is a schematic sectional view showing a configuration of a page turning reading unit according to a third embodiment of the present invention.

FIG. 13 is a schematic configuration diagram of a charging roller of a page turning unit provided inside a page turning reading unit according to a third embodiment of the present invention.

FIG. 14 is a schematic perspective view of a page turning means provided inside a page turning reading unit according to a third embodiment of the present invention.

FIG. 15 is a schematic explanatory view showing a process of charging a turning belt by a charging roller of a page turning means according to a third embodiment of the present invention.

FIG. 16 is a schematic perspective view of a page turning means in a conventional book document reading apparatus.

FIG. 17 is a schematic explanatory view showing a process of charging a turning belt by a charging roller of a page turning means in a conventional book document reading apparatus.

[Explanation of symbols]

 13 Document Stand 13a, 13b Elevating Table 14 Book Document 15 Page Turning Reading Unit 17 Document Reading Means 18 Page Turning Means 22 Drive Motors 33a, 33b, 133, 233 Turning Belt 34 Drive Rollers 34a, 34b Electrode 35 Follower Rollers 36a, 336a, 336b Charging rollers 37, 38 Pressing sheet 60 Conductive member 61 Insulating member 70, 71 DC high voltage power supply 72 Static elimination brush 136 Page suction means 136a, 136b Comb electrode 136c Dielectric 136d Insulator 236a, 236b Conductive pattern 336c Insulating coating

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-262073 (JP, A) JP-A-5-50784 (JP, A) JP-A-3-211129 (JP, A) JP-A-5-212129 201175 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03G 15/00 B42D 9/04 H04N 1/10 H04N 1/107

Claims (5)

(57) [Claims] An image processing apparatus includes: a reversing unit for reversing a page turning reading unit including a document reading unit and a page turning unit with respect to a document surface of a book document placed and opened at a document reading position; In a book document reading apparatus for separating pages one by one by the page turning means and performing a page turning operation of the book document and reading scanning of document information, a driving roller and a driven roller provided in the page turning reading unit A turning belt that is wound around the driving roller and the driven roller, adsorbs a document page located on the upper surface of the book document, and conveys the document page in the page turning direction; and the driven roller with the driving roller serving as a fulcrum. To hold the original page from the horizontal position where the original page is sucked. Belt moving means for moving the original page suction surface of the turning belt to the inclined position for turning, page suction means arranged to be in contact with the inside of the original suction surface of the turning belt, and high voltage applied to the page suction means. And a high-voltage power supply for applying an electric current, and the page suction means comprises a pair of comb-shaped conductive patterns arranged on an insulator so as to face each other. 2. The turning belt has a volume resistivity of 10 ^8.
2. The book document reading apparatus according to claim 1, wherein the book document reading apparatus is a dielectric of 10 to 10 ¹⁵ Ωcm. 3. A volume resistivity of 10 ⁸ on the conductive pattern.
10 ¹⁵ are dielectric coatings [Omega] cm, the electrostatic attractive force generated on the dielectric surface upon application of a DC voltage to the conductive pattern, according to claim 1, characterized in that the adsorption of the document page Or the book document reading device according to 2. 4. The book document reading device according to claim 1, wherein the high-voltage power supply is a DC high-voltage power supply. 5. The method according to claim 1, wherein the inside or outside of the turning belt is
5. The book document reading apparatus according to claim 1, further comprising a charge removing means for removing charges applied to the turning belt.