JPH08317142A - Book original reader - Google Patents

Abstract

PURPOSE: To constitute a deviation and rumples prevention mechanism with a few number of components by avoiding a cover sheet for a book original in the book original reader from being deviated or rumpled. CONSTITUTION: A shaft 50 is inserted to a cylinder section 37a formed to a fixed end of a cover sheet 37 to a mount section 40. A groove opening 51 through which the cylindrical section 37a with the shaft 50 inserted thereto passes is provided to the mount section 40. Engagement sections 40a, 40a, 40b are provided in parallel with the main scanning section are provided to one ridge in the lengthwise direction. Furthermore, two projections 40c, 40c are provided to both ends of the groove opening 51 in a short side direction to suppress movement of the shaft 50 in the main scanning direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a book manuscript reading device such as a copying machine, a scanner, and a facsimile.

[0002]

2. Description of the Related Art FIG. 3 is an overall configuration diagram of a book document reading apparatus having a page turning mechanism, and FIG. 4 is an enlarged view of a main part thereof. In the figure, 11 is a main body, 12 is a contact glass, and 13 is a document table. The document table 13 includes a pair of lift tables 13a and 13a.
It has a pull-out structure having b, and a book document 14 such as a book is placed in a spread state on the elevating tables 13a and 13b by pulling it out to the front of the apparatus.
The elevating tables 13a and 13b can be moved up and down depending on the thickness and opening degree of the book original 14, and when the book original 14 is pushed into the main body 11 and placed, it stands by at the center of the main body 11. It slides right under the carriage 15.

The carriage 15 is provided with a reduction optical system 17 for reading an original in a case 16 and a turning belt unit 18 for turning pages, and one of pulleys 20a, 20b around which a timing belt 19 is wound. A belt 21 is wound around a drive pulley 20a with a motor 22, and the timing belt 19 is rotated by driving the motor 22 to reciprocate the carriage 15. In the case 16 of the carriage 15, illuminations 24a, 24b, mirrors 25, 26, 27, 31, lenses 28, CCD 28 provided directly under the upper slit 23 are provided.
9. Elements such as the illuminations 30a and 30b that configure the reduction optical system 17 are provided.

The turning belt unit 18 turns the pages of the book original 14 when the carriage 15 moves from right to left in the drawing. The turning belt 33 is stretched between a driving roller 34 and a driven roller 35. The charging roller 36 is arranged so as to come into pressure contact with the upper portion of the turning belt 33. The surface of the turning belt 33 has a volume resistivity of 10 ¹⁵ Ωcm.
The above high resistance layer, the back surface has a volume resistivity of 10 ⁵ to 10 ⁷ Ωcm
It is a belt made of synthetic resin or synthetic rubber with a two-insertion structure consisting of a medium resistance layer. The drive roller 34 is a highly conductive rubber roller whose shaft is grounded. As shown in FIG. 5, the charging roller 36 has a shaft connected to a high-voltage AC power source 66, and the roller portion covering the shaft is formed of hydrin rubber or the like having a volume resistivity of about 10 ⁷ to 10 ⁹ Ωcm.

The folding belt 33 is provided on the carriage 15
When is moved, the rack 56 arranged parallel to the moving direction, the gear 57 attached to the carriage 15, and the drive gear 58 of the drive roller 34 rotate in the same direction as the moving direction of the carriage 15 at the same speed. There is.

In the figure, 37 and 38 are a pair of pressing sheets,
One end of the pressing sheet 37 on the left side of the drawing is the carriage 15
Is wound on a winding roller 39 provided on the main body 11 at the left end side in the moving direction of the above, and is attached so that it can be unwound. Is also wrapped around the driven roller 41 provided on the main body 11 so as to be in sliding contact therewith, and the carriage roller 4 is used as a driven roller on the right side in the moving direction of the carriage 15.
2 is provided, and the pressing sheet 37 is also wound around the carriage roller 42 so as to come into sliding contact therewith. A gear 43 is connected to the take-up roller 39.
The drive force is transmitted from the drive pulley 20a.

Also, one end of the pressing sheet 38 on the right side in the drawing is wound around a winding roller roller 44 provided on the main body 11 at the left end side in the moving direction of the carriage 15 so as to be wound, and the other end portion Is also fixedly held on the mounting portion 45 provided on the main body 11, and the intermediate portion is also fixed on the main body 1
It is wound so as to be in sliding contact with the driven roller 46 provided in 1.
A pair of carriage rollers 47 and 48 are provided as driven rollers on the left side in the moving direction of the carriage 15, and the pressing sheet 38 is wound around these carriage rollers 47 and 48 so as to come into sliding contact therewith. A gear 49 is connected to the winding roller 44, and the driving force is transmitted from the driven pulley 20b to the gear 49.

A torsion coil spring (not shown) is provided inside the take-up rollers 39 and 44 so that tension can be constantly applied to the pressing sheets 37 and 38.

Next, the document reading means and the page turning operation will be described mainly with reference to FIG. When the carriage 15 scans and moves from left to right in the drawing, the reduction optical system 17 in the case 16 reads an image of the book document 14. By switching the optical path with the mirror 25, the sheet original placed on the contact glass 12 can be read.

When the carriage 15 moves from right to left in the figure, a page turning operation is performed. That is, when a high voltage having a constant frequency is applied to the charging roller 36 while the carriage 15 is moving at a constant speed, positive and negative striped charging patterns are formed on the surface of the turning belt 33. For example, when the moving speed of the carriage 15 is 240 mm / sec and the frequency of the AC voltage applied from the high voltage power source 66 is 6
At 0 Hz, a charging pattern having a cycle of 4 mm is formed on the surface of the turning belt 33, and only one page of the book original 14 is adsorbed by the adsorption force generated by the non-uniform electric field due to this charging pattern.

When the carriage 15 moves to the left from the right end in the figure and a predetermined length of the right page of the book original 14 is applied to the lower side of the turning belt 33, the above-mentioned suction force causes the turning end of the page. Adsorbed by 33. Thereafter, as shown in FIG. 6, the turning belt 33 is tilted to lift the adsorbed page, and when the carriage 15 is further moved to the left, the adsorbed page is conveyed while adsorbed on the turning belt 33, and is conveyed to the page storage guide plate 52. It enters and is further conveyed by the page conveying roller 53 arranged in the back. And carriage 1
When the sheet 5 further moves and passes through the central part of the book document 14, the drive of the conveying roller 53 is cut off, and the page is naturally discharged to the left side.

[0012]

By the way, in order to attach the pressing sheets 37 and 38 to the mounting portions 40 and 45, a bar member is passed through a tubular member formed by connecting the end portions of the pressing sheets, Some are hooked on the hook of the mounting member. However, when such a structure is adopted,
Since the pressing sheet is displaced in the main scanning direction of the document reading with respect to the axis, problems such as wrinkles or the end of the main scanning direction coming into contact with the mounting member and becoming tattered may occur.

In order to suppress the occurrence of such problems,
There is also known a technique of adding a member for preventing a deviation in the main scanning direction at the end of the pressing sheet, but there are other problems such as an increase in the cost of parts due to an increase in the number of parts, an increase in the number of assembling steps, and a deterioration in the assemblability. It had happened.

The present invention has been made in view of such conventional problems.
An object of the present invention is to provide a book document reading apparatus which does not cause a shift or wrinkling of a pressing sheet, can be configured with a small number of parts, has a good assembling property, and can keep costs low.

[0015]

In order to achieve the above-mentioned object, a book document reading apparatus according to the present invention is reciprocated with respect to a document surface of a book document placed in a spread position at a document reading position. The page turning reading means for separating the pages of the book original one by one and reading and scanning the original information, and the movement of the page turning reading means for contacting the original surface of the book original and pressing the book original. A pair of holding sheets arranged at both ends in the direction, and a method of moving the page turning reading means for winding the pair of holding sheets, respectively, and a pair of winding means provided at both ends, each of the winding means A mounting member for mounting one end of the pressing sheet, a driven roller for winding an intermediate portion of the pressing sheet, and the other end side of the pressing sheet. It consists of a take-up roller for taking up and unwinding, and the take-up roller on the front side of the moving direction winds up the pressing sheet on the side of the moving direction during the reciprocating movement of the page turning reading means. ,
In a book document reading device in which a take-up roller on the rear side in the moving direction unwinds the holding sheet in a stretched state, a reciprocating movement of the page-turning reading means is attached to each attachment member of the pair of holding sheets. It is configured such that the deviation preventing means for the orthogonal main scanning method is integrally provided.

Further, in the book document reading apparatus according to the present invention, a tubular portion for inserting and holding an attachment shaft is provided at one end of the pressing sheet to be attached to the attachment member, and a groove opening is provided in the attachment member. An engaging portion is provided on one edge side in the longitudinal direction of the groove opening, which is the winding direction of the pressing sheet, so as to allow passage of the tubular portion through the shaft, and the lateral direction of the groove opening. A pair of protrusions may be provided on both ends of the shaft to prevent movement of the shaft in the axial direction at intervals corresponding to the longitudinal dimension of the shaft.

[0017]

An embodiment of the present invention will be described with reference to the drawings.
It should be noted that in the following description, the parts common to the conventional ones will be denoted by the common reference numerals. Further, in the following embodiments, only one of the pair of pressing sheets will be described, but it goes without saying that the other pressing sheet also has the same configuration.

FIG. 1 is a perspective view showing an embodiment of a book document reading apparatus according to the present invention, and FIG. 2 is a side view of the same. As shown in FIG. 1 (A), a fixed end portion of the pressing sheet 37 of the present embodiment to the mounting portion 40 is joined by adhesion, welding, sewing or the like to form a tubular shape. The shaft 50 is inserted through the portion 37a.

Further, the mounting portion 40 is provided with a groove opening 51 through which the cylindrical portion 37a having the shaft 50 inserted therethrough is provided, and engaging portions 40a, 40a and 40b are provided at one longitudinal edge. The edges on which the engaging portions 40a and 40b are provided are edges on the winding direction side of the pressing sheet 37, and are parallel to the reading main scanning direction of the book document, that is, the winding roller 39,
The cylindrical portion 3 which is arranged to be parallel to the axes of the driven roller 41 and the carriage roller 42 and has passed through the groove opening 51.
7a engages as shown in FIG. 1 (B).

Further, two protrusions 40c, 40c are provided at both ends in the lateral direction of the groove opening 51 of the mounting portion 40. As shown in FIG. 4, these protrusions 40c are formed on the shaft 50.
Are restricted from moving in the main scanning direction.

As already described, the pressing sheet 37 is always tensioned by the torsion coil spring (not shown) inside the winding roller 39, so that the tubular portion 3
7a is an engaging portion 40 of the mounting member 40 together with the shaft 50.
a, 40b are strongly pressed and held, and the projection 40
It is sandwiched between c and 40c to suppress the deviation in the main scanning direction.

[0022]

As described above, the book document reading apparatus according to the present invention is provided integrally with the means for preventing the deviation in the main scanning direction at the mounting portion of the pair of pressing sheets. Since there is no shift or wrinkle and the number of parts can be reduced, the assembling property is good and the cost can be kept low.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of an embodiment of a book document reading apparatus according to the present invention.

2 is a side view of the embodiment of FIG. 1. FIG.

FIG. 3 is a cross-sectional view showing a conventional book document reading device.

FIG. 4 is an enlarged cross-sectional view of a main part of the device shown in FIG.

5 is a perspective view showing a turning belt unit of the apparatus of FIG.

6 is a sectional view showing a page turning operation of the apparatus of FIG.

[Explanation of symbols]

 11 main body 12 contact glass 13 manuscript table 13a, 13b lift table 14 book manuscript 15 carriage 16 case 17 reduction optical system 18 turning belt unit 19 timing belt 20a, 20b pulley 21 belt 22 motor 23 slits 24a, 24b, 30a, 30b lighting 25 , 26, 27, 31 Mirror 28 Lens 29 CCD substrate 33 Turning belt 34 Driving roller 35 Driven roller 36 Charging roller 37, 38 Holding sheet 37a Cylindrical part 39, 44 Winding roller 40, 45 Mounting part 40a, 40b Engaging part 40c Projection part 41, 46 Driven roller 42, 47, 48 Carriage roller 43, 49 Gear 50 Shaft 51 Groove opening 53 Conveying roller 56 Rack 57 Gear 58 Drive gear

Claims (2)

[Claims] 1. A page turning for reading and scanning document information by separating the pages of the book document one by one by reciprocating with respect to the document surface of the book document placed at the document reading position in the spread position. The reading means, a pair of pressing sheets arranged at both ends in the moving direction of the page turning reading means so as to contact the original surface of the book original and press the book original, and the pair of pressing sheets are wound around each of the above. Method of moving the page turning reading means: A pair of wrapping means provided at both ends, each wrapping means attaching a mounting member to one end of the pressing sheet, and a driven member for wrapping an intermediate portion of the pressing sheet. Roll up the roller and the other end of the pressing sheet,
The take-up roller is configured to be able to be unwound so that the take-up roller on the front side in the moving direction winds up the pressing sheet on the moving direction during the reciprocating movement of the page turning reading means. In a book document reading device in which a winding roller on the rear side unwinds the holding sheet in a stretched state, the attachment members of the pair of holding sheets are orthogonal to the reciprocating movement of the page turning reading means. A book document reading device, which is integrally provided with means for preventing deviation of a main scanning method. 2. The winding direction of the pressing sheet, wherein a tubular portion for inserting and holding an attaching shaft is provided at one end of the pressing sheet to be attached to the attaching member, and a groove opening is provided in the attaching member. An engaging portion is provided on one edge side in the longitudinal direction of the groove opening so as to allow passage of the tubular portion through the shaft, and both ends of the groove opening in the lateral direction are provided with a longitudinal direction of the shaft. 2. The book document reading device according to claim 1, further comprising a pair of protrusions for preventing movement of the shaft in the axial direction with a space substantially corresponding to the direction dimension.