JP3344869B2 - Page turning device for book - 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 manuscript page turning apparatus having a page turning function for automatically turning pages of a book manuscript.

[0002]

2. Description of the Related Art Hitherto, as a method of automating a page turning operation of a book manuscript which is troublesome, a method using a friction roller, a method using air suction, and the like have been proposed. And the latter method has problems such as the noise of the air suction noise.Therefore, these conventional page turning methods have many proposals only with ideas, and reach a level that can be realized substantially. Not.

[0003] In view of these circumstances, the present application is, for example,
As described in Japanese Patent Application Laid-Open No. 6-250468, a page of a book manuscript spread and placed on a document table is sucked and conveyed by a turning belt to generate an uneven electric field. We have developed a "book turning device for book manuscript" that turns the book manuscript by scanning over the manuscript surface with a scanning unit that supports. This book manuscript page turning apparatus can completely automate the manuscript manuscript page turning operation and manuscript reading scan, which required a great deal of labor for copying, etc., thereby significantly improving the productivity of copying and the like. A multifunctional document reading system can be realized.

[0004]

By the way, as shown in FIG. 12 (a), the book turning apparatus proposed by the present applicant has a charging roller 225 on the surface of a turning belt 208 made of a dielectric belt. Causes an uneven electric field,
In a state where the leading end of the page of the book BO is attracted to the turning belt 208, the turning roller 224 is lifted around the turning belt driving roller 223 as a rotation center, and the turning belt 208 is rotated in this state to turn the page of the book BO. The leading end is sucked and conveyed by the turning belt 208, and the scanning unit 200 supporting the turning belt 208 is moved horizontally in the direction of the arrow, and the turning of the page is performed by scanning the surface of the original with the turning belt 208. It is configured to do so. Here, in this book page turning apparatus, the turning belt 208 as a page turning means moves the document on the document surface (scanning speed of the scanning unit 200) and the page conveying speed for sucking and conveying the page (turning page). The linear velocity at the time of rotation of the belt 208 was set to be the same.

However, the shape of the upper surface (original surface) of the book BO which is opened on the platen 1 is not necessarily flat, and in fact, as shown in FIG. The side (downstream in the scanning direction) is often raised. Therefore, in this book original page turning apparatus, when a page is attracted to the turning belt 208 and the turning belt 208 is moved to the binding portion side while the page is picked up, the turning belt 208 moves. The raised document surface is pressed against the document table 1. For this reason,
In this book page turning apparatus, when the document surface is pressed, the lifting slack is absorbed by shifting the document page to the upstream side in the scanning direction (opposite to the scanning direction of the turning belt 208). Due to the displacement of the manuscript page,
As shown in FIG. 12B, the original page once attracted to the turning belt 208 is easily peeled off from the turning belt 208, and the adhesion of the original page to the turning belt 208 is deteriorated, and a turning defect occurs. There was something to do.

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 eliminate the occurrence of a turning defect due to a shift of a book original and to provide a reliable page turning operation. An object of the present invention is to provide a page turning apparatus for a high book manuscript. Another object of the present invention is to provide a highly reliable book manuscript capable of reliably turning over by preventing the manuscript page from being damaged when eliminating the occurrence of a turning failure due to the displacement of the book manuscript. An object of the present invention is to provide a turning device.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a document table on which a book document is placed, and a top page of the book document which is opened and placed on the document table . Adsorb
To move the document in the page turning direction while transporting
Therefore, the page turning direction for turning the top page
Page turnover for sucking and transporting the topmost page in the opposite direction
In the page turning apparatus for a book with the default
From the speed at which the turning belt moves on the original surface,
The speed at which the top page of the page turning belt is conveyed by suction is increased .

According to another aspect of the present invention, there is provided an apparatus for turning pages of a book original according to claim 1, wherein the speed at which the page turning belt moves on the original surface is adjusted.
And the uppermost page of the page turning belt is sucked and conveyed.
The speed ratio is set to be greater than 1 and 1.1 or less.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. However, the configuration and operation of the range that can be clearly recalled from the description in this specification will be omitted or simplified in order to avoid complication. The present invention
Although it is possible to configure the page turning means of the original document independently of the image reading means, here, an apparatus in which both the above-described page turning means and the image reading means are incorporated in one unit is referred to as an embodiment. did. In addition, the present embodiment has substantially the same function as the book turning page reading apparatus proposed by the present applicant in principle.

First, the configuration of the scanner unit 30 in this embodiment will be described. FIG. 1 shows a TPS (Turn the Page Scan) according to the present embodiment.
r; page turning reading device). The upper half of the main body of the TPS is a scanner unit 30. The scanning unit 200 travels in the scanner unit 30 in the left-right direction in FIG. The scanned original BO is scanned. FIG. 2 shows a configuration diagram of a scanning drive system of the scanning unit 200. FIG. 2 shows a scanning drive system of the scanning unit 200 as viewed from above the apparatus main body. In FIG. 2, a timing belt 312 is provided on the back side of the apparatus main body by a pulley 304 and a three-stage pulley 302 on the front side of the apparatus main body. A timing belt 313 is stretched in the left-right direction by a pulley 305 and a two-stage pulley 306, respectively. Here, the rotation axes of the pulley 304 and the pulley 305 are respectively
And the timing belt 3
A predetermined tension is applied to 12,313. Three-stage pulley 3
02 is a timing belt 310 and a motor pulley 301
And the two-stage pulley 306 with the timing belt 311
And are respectively connected. Timing belt 311
Obtains a predetermined tension by pulling the idler 303 outward with a spring 309. The scanning unit 200 has its back side and front side fixed to the timing belts 312 and 313 by clamps 315, respectively.
By the rotation of the scanner motor 106 that drives one rotation shaft, the rotation is performed via the timing belts 312 and 313.

FIG. 3 shows the configuration of the scanning unit 200 in this embodiment. In FIG. 3, original pressing rollers 281a and 281b are provided on the lower left and right sides of the scanning unit 200, respectively.
Outside the sheet take-up rollers 280a, 280
80b are rotatably supported respectively. The central ends of the left and right independent document pressing sheets 282a and 282b are wound around the sheet take-up rollers 280a and 280b, respectively.
The outer ends of the a and 282b are fixed to side plates of the scanner unit 30, respectively. FIG.
As shown in the figure, each winding roller shaft 251a, 251b
Sheet take-up gears 232a, 232
b is fixed, and these sheet winding gears 23
The left and right ends 2a and 232b are fixed to the side plate of the scanner unit 30 and mesh with a drive rack 231 having teeth over substantially the entire length via idle gears 233a and 233b. Thereby, when the scanning unit 200 travels in FIG.
33a, 233b and each sheet winding gear 232
a, 232b are rotated, and each sheet take-up roller 280 is rotated.
a, 280b via the original holding sheets 282a, 282b.
Pulling out and winding of 82b are performed, and the tension of the left and right sheet winding rollers 280a and 280b is always maintained substantially constant.

On the other hand, as shown in FIG. 3, a platen glass 205 for reading the original and a turning belt 208 for turning over the pages of the original are arranged between the original pressing rollers 281a and 281b.

As shown in FIG. 3, inside the platen glass 205, two fluorescent lamps 201 for illuminating a book original are provided.
Reference numerals 202 are arranged on the right and left sides of the book original reading unit, respectively. In FIG. 3, the original image illuminated by the fluorescent lamps 201 and 202 is reflected by the first mirror 219, then alternately reflected by the second mirror 220 and the third mirror 221 and finally transmitted through the lens 216 in FIG. And CCD10
1 is reduced. In addition, the turning belt 208
A charging roller 225 is disposed in contact with the outside of a part of the upper side of the turning belt 208, which is slightly away from the turning belt drive roller 224, and is wound around the turning belt driving roller 223 and the turning roller 224. I have.

Further, as shown in FIG. 4, a turning belt driving gear 234 is fixed to the end of the driving shaft of the turning belt driving roller 223, and the turning belt driving gear 234 is connected via an idle gear 235. , Drive rack 2
32 is engaged. Thereby, the scanning unit 20
When the zero travels, the turning belt drive gear 234 rotates along with the idle gear 235 along the drive rack 232, and the turning belt 208 rotates due to the rotation of the turning belt drive roller 223.

As described above, when the scanning unit 200 travels, as described above, the looseness of the rising due to the pressing of the document surface is caused in the scanning direction upstream side (turning belt 20).
8 is absorbed by the document pages being shifted to the opposite side (in the scanning direction of FIG. 8), and as a result of the document page shifts, the document pages once adsorbed to the turning belt 208 are turned, as shown in FIG. Attempts to loosen in the direction of peeling from 208. Therefore, in the present embodiment, the page transport speed for sucking and transporting pages (the linear speed when the flip belt 208 rotates) is larger than the moving speed (scanning speed of the scanning unit 200) for scanning the document surface of the flip belt 208. Set. As a result, in this embodiment, the page transport speed (the scanning belt 208) for sucking and transporting pages is higher than the moving speed (scanning speed of the scanning unit 200) for scanning the original surface of the flip belt 208.
Since the linear velocity at the time of rotation is set to be large, the slack of the original page in the peeling direction during the scanning movement of the scanning unit 200 can be absorbed, and the adhesion to the turning belt 208 can be always secured.

However, here, the turning belt 20
If the ratio of the moving speed for scanning on the original surface to the page conveying speed for sucking and conveying the page is set to be too large, the pages sucked by the turning belt 208 will be scanned by the scanning unit 200 and the turning belt 208 at the same time. Is excessively tensioned due to the speed difference from the linear velocity at the time of rotation, and the tension may damage the original page. Thus, in the present embodiment, the ratio of the moving speed of the turning belt 208 to scan on the document surface and the page transport speed of sucking and transporting pages is set to be greater than 1 and 1.1 or less. As a result, in the present embodiment, it is possible to avoid excessive tension on the original page due to the speed difference between the scanning speed of the scanning unit 200 and the linear velocity when the turning belt 208 rotates, and to prevent the original page from being damaged due to the tension.

Next, the turning operation of the scanner unit 30 will be described. FIG. 5 is a diagram illustrating the operation of the page turning section of the scanning unit 200 according to the present embodiment. The turning belt 208 in this embodiment is made of PET, P
C, PVC, etc., and the surface layer has a surface resistance of 10 ¹⁴
High resistance film of Ω or more, the back layer has a surface resistance of 10 ⁸
It is composed of a double-structure resin film made of a low-resistance film of Ω or less. Also, a turning belt driving roller 2
Reference numeral 23 denotes a roller formed by coating a conductive rubber on the surface of a grounded metal roller, and realizes reliable belt driving and grounding. Further, the charging roller 225 is formed of a metal roller.
At a predetermined timing, a high voltage of ± 2 kV is applied from the AC power supply 253 via the changeover switch 253a. In FIG. 5, while the scanning unit 200 is running and the turning belt 208 is driven, the changeover switch 253 a is turned on at a timing described later, and a high voltage of ± 2 kV is applied to the charging roller 225 from the AC power supply 253. An alternating electric field is generated on the surface of the belt 208, and the action of the alternating electric field causes the turning belt 20 to rotate.
8, a suction force is generated to attract the topmost page 254 of the book BO in contact.

When a document reading operation is started,
The scanning unit 200 at the left end home position of the scanner unit 30 starts traveling rightward. The platen glass 205 of the scanning unit 200
When the original reading position of the original BO is on the left page of the original BO, as shown in FIG. 6, the optical system of the scanning unit 200 starts the reading operation of the original BO, and moves the original surface of the original BO to the left page. To the right page. The reading start position of the scanning unit 200 here depends on the size (size) of the book BO. In this manner, when the optical system of the scanning unit 200 finishes reading up to the right end of the book BO, the scanning direction of the scanning unit 200 is reversed as shown in FIG. 7, and as shown in FIG. The page turning operation of the right page of the book BO after this reading is started. When the page turning of the book BO is started, the charging pattern portion formed on the surface of the turning belt 208 overlaps the topmost page 254 of the book BO before the page turning operation. And this top page 254
As shown in FIG. 8, when the tip of the
Is moved to the position shown by the solid line in FIG. 5 by the action of a solenoid (not shown). By this, this turning belt 2
08, only the topmost page 254 of the book BO is attracted to the surface of the turning belt 208 by the attraction force due to the uneven electric field of the charge pattern formed on the surface of the topmost page 08.
The end of 54 is lifted with the turning belt 208. The attraction force due to the uneven electric field is determined by the top page 25.
It has the feature that pages other than 4 are not adsorbed. As described above, after turning over the top page 254 of the book BO,
When the scanning unit 200 is moved toward the end home position as shown in FIG. 8 in this state,
As shown in FIG. 9, the topmost page 254 of the book BO is reliably conveyed and passes between a pair of upper and lower page guides 227 and 228 (FIG. 3) arranged on the right side of the scanning unit 200. Thus, the leading end side is sent out to the right outside of the scanning unit 200. At this time, the page turning sensor 214 (FIG. 3) mounted on the page guide 227 on the upper side of the scanning unit 200 detects the original page sent to the right outside of the scanning unit 200, and the original page is detected. It is determined that the page has been turned normally. As is clear here, in the present embodiment, the original page turned up by the page turning operation of the scanning unit 200 is kept in a natural posture without being rounded or bent. The scanning unit 2 is provided with a page storing means for storing the turned up original page without damaging the original page.
00, the scanning unit 200
Can be reduced in size. Next, as shown in FIG. 10, when the top page 254 of the book BO is turned up to the binding portion of the book, the turning belt 208 is returned to the original position (the broken line position in FIG. 5). In this state, when the scanning unit 200 is further moved toward its end home position,
As shown in FIG. 1, the turned-up original page is pulled by the binding section of the book original to form a pair of page guides 227 and 228.
Is returned from the scanning unit 200 so as to be superimposed on the left page of the book BO. In this way, when the turned-up original pages are all superimposed on the left page of the book original BO, the scanning unit 200 finishes one original reading / page turning operation for a two-page spread original. Here, when the original reading / page turning operation for the book original BO is repeatedly executed, or when only one of the original reading and the page turning operation is repeatedly executed, the page is turned up as described above. The moving direction of the scanning unit 200 is reversed at the same time when the original pages are all superimposed on the left page of the original BO, and the scanning unit 200 is moved in the shortest course with respect to the original surface of the original.
Is repeated.

[0019]

According to the present invention, according to the first aspect of the present invention, the page transport speed for sucking and transporting the page (the rotation speed of the flip belt) is determined from the moving speed (scanning speed of the scanning unit) for scanning the document surface of the flip belt. Line speed) is set high,
It is possible to absorb the slack of the original page in the peeling direction during the scanning movement of the scanning unit, improve the adhesion to the turning belt, and reduce the occurrence of page turning failure.

Further, in the present invention, the ratio of the moving speed of the turning belt for scanning the original surface to the page conveying speed for sucking and conveying the pages is set to be larger than 1 and equal to or smaller than 1.1. It can absorb the slack of the original pages in the peeling direction during the scanning movement, improve the adhesion to the turning belt, reduce the occurrence of page turning defects, and provide the scanning speed of the scanning unit and the line when the turning belt rotates. Excessive tension on the original page due to a speed difference from the original speed can be avoided, and damage due to the original page tension can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing the overall configuration of a book original page turning apparatus of the present invention.

FIG. 2 is a schematic plan view showing a driving mechanism of a scanning unit in the page turning apparatus of the book original.

FIG. 3 is a schematic sectional view of the scanning unit.

FIG. 4 is a schematic side view of a turning belt driving mechanism in the scanning unit.

FIG. 5 is a schematic cross-sectional view of a main part of the scanning unit showing a page turning operation of the scanning unit in the book original page turning apparatus.

FIG. 6 is a transition diagram at a left-page image reading position of the scanning unit in a page turning operation mode of the scanning unit.

FIG. 7 is a transition diagram at the right page image reading completion position of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 8 is a transition diagram at a right page turning start position of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 9 is a transition diagram in the middle of turning the right side of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 10 is a transition diagram at a right page turning end position of the scanning unit in the page turning operation mode of the scanning unit.

FIG. 11 is a transition diagram of the scanning unit in the middle of turning over the right page during the page turning operation mode.

FIG. 12 is a schematic cross-sectional view of a main part of the scanning unit for explaining page turning operation of the scanning unit and occurrence of a page turning failure in a conventional book document page turning apparatus.

[Explanation of symbols]

 1 Document table 106 Scanner motor 200 Scanning unit 201, 202 Fluorescent lamp 205 Platen glass 208 Turning belt 223 Turning belt driving roller 224 Turning roller 225 Charging roller 227, 228 Page guide 231 Drive rack 232a, 232b Sheet winding gear 233a, 233b Idle Gear 234 Turning belt drive gear 235 Idle gear 253 AC power supply 281a, 281b Document holding roller BO Book original

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ identification code FI H04N 1/107 (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 1/04-1/207 B42D 9/04 B65H 3/18 G03B 27/58-27/64 G03G 15/00 107

Claims (2)

(57) [Claims] An original platen on which a book original is placed, and a topmost page of the book original which is opened and placed on the platen is sucked and conveyed.
While moving in the page turning direction on the manuscript surface
For turning over the top page, it is opposite to the page turning direction.
A page turning belt for sucking and conveying the uppermost page in the opposite direction;
Page turning device for book manuscripts provided with
The page turning speed is higher than the speed at which the belt moves on the original surface.
A speed at which the uppermost page of the belt is conveyed by suction is increased. 2. The apparatus according to claim 1, wherein the speed at which the page turning belt moves on the original surface is adjusted.
And the uppermost page of the page turning belt is sucked and conveyed.
2. An apparatus according to claim 1, wherein the speed ratio is greater than 1 and less than or equal to 1.1.