JP3229449B2 - Platen for book manuscript - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document for reading a book document or turning a page with respect to a scanning surface of a scanning unit used for document reading apparatus such as a copying machine and a facsimile. The present invention relates to a book document platen on which the book document is placed with its surfaces facing each other.

[0002]

2. Description of the Related Art As a document reading device in a copying machine, a facsimile, or the like, (1) a document surface of a book document placed facing upward on a document support table is brought into contact with an upper contact glass so that a scanning optical system is provided. A device that exposes a document image by scanning. (2) A device for reading a document image by exposing and scanning a document surface of a book document placed on a document support table with the document face open upward. Etc. are known.

Further, as a page turning apparatus for a book document, (1) a device for separating pages of paper by suctioning air while moving a book document placed face-down and spread downward. (2) A device for turning pages of a book original placed and opened upward with a roller, an arm, or the like. Etc. are known.

Further, as a book document adjusting device for a document table, (1) As shown in Japanese Patent Application Laid-Open No. 61-184527, "seesaw type document support device", There is a device that adjusts the height of the left and right platens by moving as shown in FIG.

When the original is a sheet original,
As is well known, by installing an automatic document feeder (ADF), it is possible to automatically read the document information. However, when the document is a book document, an automatic page turning mechanism is realized. Due to the fact that it is difficult in practice, at this stage, page turning of a book document can only be performed manually. On the other hand, as described above, conventionally, there have been various proposals of methods and means for automating the reading of a book document which is troublesome. You have not reached the level.

[0006] In view of the current situation, the present application provides, for example,
As disclosed in Japanese Patent Application No. 2-193589, etc.,
A part of the page-turning belt stretched along the document-mounting surface of the document-mounting table forms a detour portion separated from the document-mounting surface, and is formed between the document-mounting surface and the page-turning belt. A page turning reading unit (hereinafter, referred to as a scanning unit) provided with page storage means, page suction means, page separation means, reading means, and the like is relatively moved with respect to the document surface of the book document placed and opened. By doing so, a book document page turning reading device for performing the page turning of the book document and the document reading scan has been proposed. According to the book page reader for book manuscripts according to this proposal,
As described in the above specification and the like, the page turning operation of a book manuscript and the manuscript reading scan, which required a great deal of labor for the copying operation and the like, can be completely automated, and the productivity of copying and the like can be significantly improved. A multi-function original reading system can be realized.

[0007]

By the way, in the book turning device of the book manuscript proposed earlier by the present applicant,
The left and right pages of the book document on the document table are placed on the same flat plane. For this reason, in this book page turning reader,
If the height of the document surface of the book document opened on the document table is different between the left and right pages, a step occurs on the document scanning surface during image reading and page turning scan of the scanning unit, and this book step is generated. Since the scanning unit moves up and down at the step of the document, there is a problem that the image reading and the page turning operation become unstable. Therefore, in an apparatus for reading an image of a book document or turning a page by relatively moving the scanning unit with respect to the document surface of the book document as described above, it is necessary to stabilize the image reading and page turning operation of the scanning unit. It is desirable that the height of the document surface of the book document opened on the document table be located on the same plane, which is flat on both the left and right pages.

As described above, as a means for positioning the height of the document surface of a book document opened on the document table on the same plane, which is flat on both the left and right pages, Japanese Patent Laid-Open Publication No.
"Seesaw type document supporting device" described in JP-A-184527
Has been proposed. However, in the conventional "seesaw type document supporting apparatus", the document surface of the spread book document is pressed against a single flat glass plate from below, thereby increasing the height of the document surface of the spread book document. Are located on the same flat plane on both the left and right pages. For this reason, when the surface of the original is scanned by the above-described scanning unit using this apparatus, it is possible to read the image of only the opened pages of the book original,
The glass plate interposed between the scanning unit and the document surface hinders the automatic page turning scanning of the book document. There is a disadvantage that disappears.

In addition, since the conventional "seesaw type document supporting device" does not have a means for adjusting the position of the placed book document, the book document has a margin for positioning. Therefore, it is necessary to increase the space for placing the book document, and there is a problem that the entire apparatus becomes large. Furthermore, in the conventional "seesaw type document supporting apparatus", the document table cannot be moved in the horizontal direction in response to the vertical movement of the document table. And the document placement becomes unstable. Further, in the conventional "seesaw type document supporting device", the center position of the placed book document is shifted due to the inclination of the seesaw of the platen. There is a problem that it is shifted. Furthermore, in the conventional "seesaw type document supporting device", the thickness of the book document that can be placed on the document table is naturally changed because the interval between the central ends of the document tables divided into right and left cannot be changed. It is limited and cannot handle various types of book manuscripts.

[0010] As described above, it is difficult to perform stable image reading and page turning scanning of a book document on the document table in this type of conventional apparatus. The present invention
It was made in view of the above points, and the purpose is
It is an object of the present invention to provide a book platen platen capable of performing stable image reading and page turning scanning of a book plate with a small device.

According to the first aspect of the present invention, the reading range is set in advance.
Reading constant workbook document reading scan unit by blanking click document, or, with respect to the lower surface of the unit for performing page turning to face the document surface of the book document, book for disposing the book original An original platen for placing the right side page of the opened book original; a left side page placing table for placing the left side page of the opened book original; a left mounting table support means for movably supporting the Pejino table in <br/> lateral direction, and the right table support means for movably supporting the right page table in the lateral direction, the right and left Placement table urging means configured to urge the left placement table support means and the right placement table support means arranged in parallel upward, and upper surfaces of the left page placement table and the right page placement table Original book placed and opened Of the page surface regulating means for regulating a vertical direction of the left and right pages surface which is wide open in the same plane, the book original read
The center of the length of the scanning area by moving the scanning unit
Is the reference position, and this reference position is
And a placement table equidistant regulating means for regulating the placement table and the right page placement table to be at the same distance from each other .

[0012] According to a second aspect of the invention, the table like distance limiting means mounting the platen of a book document according to claim 1, wherein the group
A gear rotatably supported up and down on a sub-position, a first rack supported so as to be able to move while meshing with the gear, and a gear that can be moved while meshing with the gear on the opposite side of the first rack. The first rack and the second rack are movable in parallel with each other, and the right end of the left page placing table and the end of the first rack are rotatable. And a left end of the right page placing table and an end of the second rack are rotatably joined. According to a third aspect of the invention, a book document is read,
Alternatively, a book document platen on which the book document is placed, with the document surface of the book document facing the lower surface of the unit for turning pages, wherein the right side page of the opened book document is the right page mounting location for mounting the
Base and a left page table for placing the left page of the book originals wide open, the left page placement location arranged in parallel on the left and right
Base and the mounting base connecting means for connecting the opposite sides of the right page table, the left side page table and the right page placement location
Support the stand and each independently so that it can move in the left and right direction,
And a mounting table urging support means configured to urge each of them upward, the left page mounting table and the right page mounting.
A page surface regulating means for regulating the vertical direction of the opened left and right page surfaces of the book document placed and opened on the upper surface of the placing table on the same plane, and a height difference between the left page placing table and the right page placing table . From the output of the mounting table difference detecting means, and from the output of the mounting table difference detecting means, the binding portion of the book document placed and opened on the upper surface of the left page mounting table and the right page mounting table . The binding section indexing means for determining the position, and the position of the binding section of the book document determined by the binding section indexing means, the above-mentioned left page mounting table and the above-mentioned page placement table so as to always match a predetermined position. And a placing table moving means for moving the right page placing table in the left-right direction. According to a fourth aspect of the present invention, there is provided a book document platen for mounting the book document with the document surface of the book document facing a lower surface of a unit for reading or turning pages of the book document. A right page mounting table for mounting the right page of the opened book document;
A left-side page mounting table for mounting the left-side page of the opened book original, and a mounting table connecting means for connecting the opposite sides of the left-side page mounting table and the right-side page mounting table arranged in parallel on the left and right. And supporting the left page mounting table and the right page mounting table independently movably in the left-right direction, and
Placement table biasing support means configured to bias each upward, and the left and right pages of the book original placed and spread on the upper surface of the page placement table and the right page placement table , The page surface regulating means for regulating the vertical direction of the opened left and right page surfaces on the same plane, and the left page placing table and the right page placing table are mutually
The mounting table end inclination detecting means for detecting the inclination of the imaginary straight line connecting the opposing sides, and the output of the mounting table end inclination detecting means, the left page mounting table and the right page mounting table The binding section indexing means for determining the position of the binding section of the book document placed open and placed on the upper surface, and the position of the binding section of the book document determined by the binding section indexing section are always set in advance. to match the set predetermined position, characterized by comprising a table moving means moves the left page table and the right page table in the lateral direction. According to a fifth aspect of the present invention, there is provided an original platen for mounting the book original, with the original surface of the book original facing a lower surface of a unit for reading or turning a book. The document table is divided into two document tables on the right and left sides, and the left and right document tables are configured to be movable toward and away from each other, and the thickness of a book document placed on the document table is detected. has a book original thickness detecting means, in accordance with the thickness of the book document placed on said document platen, book document position change of <br/> to the spacing of the left right original manuscript stand opposite side of A document table having an adjusting device and a left and right document table height difference detecting means for detecting the height difference between the left and right document tables; Platen for book originals with position adjustment device Oite, input detection position of the book original thickness detecting means, varying the spacing of the left and right platen opposite side of
Output base drive position of the platen interval changing means for ized, input sensing the position of the left and right platen elevation difference detecting means and output base drive position of the platen moving means for moving the left and right above the left and right platen simultaneously and characterized in that provided in front <br/> after left right platen opposing portions of the above. According to a sixth aspect of the present invention, there is provided a book document platen for mounting the book document with the document surface of the book document facing a lower surface of a unit for reading or turning a book. The document table is divided into two document tables on the right and left sides, and the left and right document tables are configured to be movable toward and away from each other, and the thickness of a book document placed on the document table is detected. A book document position adjusting device having book document thickness detecting means for changing the distance between the opposite sides of the left and right document tables according to the thickness of the book document placed on the document table; A document platen position adjusting device that has left and right platen height difference detection means for detecting the height difference between the platen plates, and moves the document platen position right and left simultaneously according to the height difference between these left and right platen plates. On the platen, Input sensing the position of the click original thickness detecting means, the opposite of the left and right platen
Output table drive position of the document table interval variable means for changing the side gap, input detection position of the left and right document table height difference detection means,
And, an output base drive position of the platen moving means for moving the left and right above the left and right of the document table at the same time, the left and right of the platen
Focus each before and after the opposing part, and
Input and output with the above output before and after the opposite part
It is characterized by being concentrated in the department . The invention of claim 7 is
A book platen for placing the book platen, with the book platen platen surface facing the lower surface of the unit for reading a book platen or a page turning unit. In the book document platen, which is divided into two right and left platens and the entire left and right platen is movable in the left and right direction,
One of the first gear that rotates in accordance with the size of the platen interval, in conjunction with the first gear, the gear side of rotation twice the rotational angle but only opposite direction of the first gear A pair of second gears each having a spiral groove , and the first gear are rotated integrally with the first gear according to the height difference between the two right and left document tables, and rotate with the first gear.
And the center axis identical third gear, in conjunction with the third gear, carved in a radial direction from the center portion to the third gear side of rotation of the rotation angle but only reverse double gear One straight groove
It has a rotation center axis second gear comprises a same pair of fourth gear, the point of intersection of the upper Symbol spiral groove and said linear groove has a fixed position at all times for the entire system A document table moving means for moving the entire left and right document tables is provided so as to maintain the document table. The invention according to claim 8 is based on claim 7
In the platen of the book document, the rotation centers of the first gear and the third gear are configured to be the same. According to a ninth aspect of the present invention, there is provided a book plate for a book original according to the seventh aspect.
Here, a part of the third gear constitutes a rotation shaft of the first gear. The invention of claim 10 is the claim
In document table of the book document of claim 7, wherein, to move in accordance with the above Kisayu two of platen interval, the two racks for transmitting rotation to said first gear, on the side surface of the third gear It is characterized by being arranged. The invention of claim 11 is the invention of claim
In document table of the book document of claim 10, wherein a fifth gear meshing with each other and the rack to rotate in response to movement of the upper Symbol two racks, the rack relative to the third gear The fifth gear arranged on the same side as the first gear is integrally formed with the first gear arranged on the opposite side of the third gear. The invention of claim 12 is the platen of the book document according to claim 7, by a change of the two platen of the height difference between the upper Symbol left, at the same time when the third gear is rotated, the first gear the third gear and the same direction of rotation, and characterized by only rotating same rotation angle. According to a thirteenth aspect of the present invention, there is provided a book document according to the seventh aspect.
Of the document table, when the state where there is no height difference between the two platen of the upper Symbol left and right, the point of intersection with the spiral groove and said linear groove is of the second gear and the fourth gear It is characterized by being located directly above or below. According to a fourteenth aspect of the present invention, there is provided the book
There are, of formed by crossing the upper Symbol spiral groove and said linear groove
Pins that fit into the holes
It is not possible to move in the direction of movement of the platen and the direction of movement
Characterized in that form freely movable structure in a direction perpendicular to.

[0013]

According to the configuration of the first aspect of the present invention, the document table is divided into right and left, and supported by supporting means so as to be able to move left and right, respectively, and the supporting means are connected to each other to form the spine of the book document. Supported. In addition, the book document reading and scanning unit is set by
The center of the length of the scanning range due to the movement of the
Since the left and right page platforms are regulated to be equidistant from each other with respect to this reference position, no matter what book document is placed, the position of the spine is Becomes constant.

According to the configuration of the second aspect of the present invention, the mounting table equidistant regulating means can move while meshing with the gear rotatably supported up and down on the reference position. The apparatus is simplified because it is composed of the supported first rack and the second rack supported so as to be able to move while meshing with the gear on the opposite side of the first rack. Further, the first rack and the second rack can be moved in parallel with each other, the right end of the left page placing table and the end of the first rack are rotatably connected, and the right page placing table is moved. Since the left end and the end of the second rack are rotatably connected,
Regardless of the height of the left and right document tables, the equidistant property of the left and right document tables from the reference position is ensured. According to the third aspect of the present invention, the original plate is divided into right and left, and the book original placed and spread is bound based on the height difference between the left and right original plate detected by the right and left original plate height difference detecting means. The position of the unit is determined, and the left and right page placing tables are moved in the left and right direction by the placing table moving means so that the position always coincides with a predetermined position set in advance.
According to the invention of claim 4, the platen is divided into right and left, and the binding portion of the book document placed and opened is opened from the inclination of the imaginary straight line connecting the mutually facing ends of the left and right platen. The position is determined, and the left and right page placing tables are moved in the left-right direction by the placing table moving means so that the position always coincides with a predetermined position set in advance. According to the fifth aspect of the present invention, the input detection position of the book document thickness detection means and the distance between the left and right document tables on opposite sides are changed.
Output base drive position of the platen interval varying means for, input detection positions of the left and right platen elevation difference detecting means, and, the output base drive position of the platen moving means for moving the left and right lateral platen of simultaneously the because they are Once provided after the previous left right platen opposing portions of the erroneous input by like can tilt after previous platen detection is prevented. According to the invention of claim 6, the input detection position of the book document thickness detecting means and the interval between the opposite sides of the left and right document tables are set.
The output table drive position of the platen gap varying unit to be changed, the input detection position of the right and left platen height difference detection unit, and the output table drive position of the platen shift unit that simultaneously moves the left and right platen plates to the left and right There, the document table facing portion of the left right
Focus on the front and back, and the input and output are
It is concentrated on the input / output unit provided before and after the opposing part.
You. According to the seventh aspect of the present invention, the size and weight of the apparatus for holding the spread binding portion (boundary between the right page and the left page) of the book document placed and spread on the document table at a fixed position are reduced. According to the invention of claim 8, the input point of the size of the interval between the two right and left document tables and the input point of the height difference between the two right and left document tables can be made the same, and A small and lightweight device can be used to hold the double-folded binding portion (the boundary between the right page and the left page) of a book manuscript placed and spread on a fixed position. According to the ninth aspect of the present invention, when the input point of the distance between the two right and left document tables and the input point of the height difference between the two right and left document tables are the same, the first gear and the second Gear 3 can be superimposed, and a small and light-weight device can be used as a device for holding the spread binding portion (boundary between the right page and the left page) of a book manuscript placed and opened on the manuscript table at a fixed position. . According to the tenth aspect of the present invention, two racks as input points for the size of the interval between the two document tables on the left and right sides can reliably slide on a plane, and the movement of the racks is smooth. The third gear can be provided to the third gear, so that the number of parts can be further reduced and the size can be reduced. According to the eleventh aspect, the rotation angle (the rotation angle of the fifth gear) based on the movement amount of the two racks as an input of the size of the interval between the two right and left document tables is changed. It can be separated from the rotation of the two racks as the difference input, and can be separated from one input point (rack) as “the size of the interval between the two right and left platens” and “the height difference between the two right and left platens”. A revolutionary device that can derive two control factors can be created. According to the twelfth aspect of the present invention, even when the height difference between the two right and left document tables changes, the third gear rotates, and the meshing fourth gear rotates, the first gear is kept in the second state. Since it rotates exactly the same as the third gear, the second gear also rotates exactly the same as the fourth gear. Then, even if the height difference between the two right and left document tables changes, no relative rotation occurs between the second gear and the fourth gear, and the intersection between the spiral groove and the linear groove does not occur. Are rotated simultaneously without changing their distances with respect to the rotation centers of the second gear and the fourth gear. As a result, the left and right document table movement amounts are
The control can be performed only by the change amount of the height difference between the two document tables. In other words, disturbance can be suppressed, and accurate document table movement control can be performed. According to the thirteenth aspect of the present invention, when there is no difference in height between the two right and left platens, that is, when the left and right pages of the book placed and spread on the platen are equal, the platen movement control is performed. The amount becomes “0” (zero), the reference position can be made coincident with the center of the original table in the maximum movement range, and the original table movement control width can be minimized. According to the fourteenth aspect of the present invention, the left and right platen movement control amounts for maintaining the spread binding portion (the boundary between the right page and the left page) of the book document placed and spread on the platen at a fixed position. That is, it is possible to detect only the horizontal distance of the point where the rotation center of the second gear and the fourth gear intersects with the spiral groove and the straight groove.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. First, the scanner unit 3 in the present embodiment
0 will be described. FIG. 1 shows the TPS of the present invention.
FIG. 1 shows an overall configuration diagram of (Turn the Page Scanner; page turning reader). The upper half of the main body of the TPS is a scanner unit 30, and the scanning unit 200 is
1 in the left-right direction in FIG. 1 and closely scans the document surface of the book document BO placed open and placed on the document table 1, thereby turning the pages of the book document BO and reading the image. Perform a scan.

In FIG. 1, the scanning unit 200 has document holding rollers 281a and 281b on the lower left and right sides of the scanning unit 200, and sheet take-up rollers 280a and 280b on the outer side thereof. Supported. Each sheet winding roller 280a, 2
80b includes left and right independent document holding sheets 282a and 282a.
Each central end of 82b is wound up,
The outer ends of the document holding sheets 282a and 282b are fixed to side plates of the scanner unit 30, respectively.

The original pressing rollers 281a, 281
b, a platen glass 2 for reading a book original
05, and a book turning belt 208 for turning over the pages of the book document. Inside the platen glass 205, two fluorescent lamps 201 and 202 for illuminating a book document are provided.
Are arranged on the left and right sides of the book document reading unit, respectively. In FIG. 1, the book document 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 passes through the lens 216. And CCD1
01 is reduced and imaged.

On the other hand, the turning belt 208 is stretched over a turning belt driving roller 223 and a turning roller 224, and a portion of the upper side of the turning belt 208 which is slightly away from the turning belt driving roller 224 is provided.
The charging roller 225 is disposed in contact with the charging roller 225.

In the TPS of this embodiment, a contact glass 206 is arranged on the upper part of the apparatus main body, and an original SO such as a sheet or a thick book original is placed on the contact glass 206 by a pressure plate (not shown). The original is scanned by the scanning unit 200 which has been set and the optical path has been switched, whereby the contact glass 206 is scanned.
The upper document image can be read.

Hereinafter, the document table unit 3 in this embodiment will be described.
5 will be described. The document table 1 of the embodiment shown in FIGS. 2 to 4 is formed of a resin plate having a thickness of 2 mm, and a material having a high coefficient of friction such as ultra-thin rubber is attached to the upper surface thereof. It is. This high coefficient of friction material
By laminating and coating, spraying, etc.
It may be formed on the upper surface of the document table 1. The document table 1 according to the present embodiment has a document placement surface (upper surface) of A4 size, and one document table is disposed on each of the left and right sides of the center 2 of the apparatus main body. A slide plate 3 is fixed below each platen 1.

On the other hand, the lower surface of the slide plate 3 is in contact with the upper surface of the upper and lower base 5 having a low friction coefficient. Here, the upper surface of the upper and lower bases 5 is formed with a resin rib such as Teflon,
It can move smoothly to the left and right with the slide plate 3. Further, the slide plate 3 and the upper and lower bases 5 are relatively fixed by a size stopper 27 described later. Angles 7a and 7b having long holes in the left-right direction are provided at four positions in the front-rear and left-right directions below the upper and lower bases 5, respectively. Another angle 8 having a fixed rotation axis and another angle 9 having a long hole in the left-right direction are fixed to the base 6 of the document table unit. Here, the link plate 10 is provided at the angles 8 and 7b, and the link arm 1 is provided at the angles 9 and 7a.
1 are rotatably supported, and the link plate 10 and the link arm 11 can smoothly slide in the left-right direction with respect to the angles 7a, 7a, 9 respectively. Further, as viewed from the entire surface of the document table unit, the arm plate 10 and the link arm 11 each of which are two in the front and rear are rotatably supported by a stud 12 at an X-shaped intersection. Also, this stud 1
With the torsion spring 13 as the center of torsion and the link plate 10
In FIG. 2, the torsion spring 13 exerts a force to constantly push the upper and lower bases 5 upward. The elevation of the upper and lower tables 5 due to the upward force is restricted by the document surface of the book document set on the document table unit 35 abutting on the scanning unit 200 whose vertical movement is restricted as described later. Thus, the pressure applied to the scanner unit 30 is maintained substantially constant regardless of the difference in the thickness of the book document.

The ends of the center 2 of the main body of the two upper and lower bases 5 are connected to each other by a back support plate 14. The back support plate 14 is made of an elastically deformable material such as rubber, and the spine of the book document BO is set on the back support plate 14. Also, the back support plate 14
The tension is always applied in the left-right direction by the action of a tension spring 17 described later. That is, the upper and lower bases 5 are provided with hooks 15, and the hooks 15 and the angles 16 of the link plate 10 are connected by the tension springs 17, whereby the pair of left and right upper and lower bases 5 is pulled in a direction away from each other. ing. Thereby, the back support plate 14
, And the spine of the book document is supported without slack.

On both sides of the base 6, side plates 1 made of sheet metal are provided.
8 is fixed, and a fixing pin 19 on which an open / close lock claw 32 of a scanner unit 30 described later
With. A leaf spring 21 for pushing the scanner unit 30 upward when the scanner unit 30 is closed, and an open / close lock sensor 20 for detecting the closed state of the scanner unit 30 are attached to one side plate 18. I have.

Next, the size stopper 27 will be described. The size stopper 27 adjusts the distance between the left and right document tables 1 according to the thickness of the book document to be placed, fixes the slide plate 3 (document table 1) and the upper and lower tables 5 relatively, This is a device for moving the table 1 and the upper and lower tables 5 integrally with each other. 5 and 6 show schematic configuration diagrams of this apparatus. As shown in FIG. 3, a pair of angles 22 are attached to the lower side of the upper and lower bases 5 at predetermined intervals. As shown in FIG. 5, a rod 23 is fixed to these angles 22 so as to be laterally suspended. This rod 23
The sliding body 24 passes through its own through-hole and the rod 23
It is mounted so that it can slide smoothly in the longitudinal direction. A short axis 26 is implanted in the sliding body 24 so as to be orthogonal to the rod 23, and a stopper 25 is rotatably supported on the short axis 26. Here, the stopper 25 extends so that a locking hole 25a formed in one end thereof is loosely fitted to the rod 23, and the other end can be grasped by a finger.

The sliding body 24 is fixed at an arbitrary position on the rod 23 by the inclination of the stopper 25 with respect to the rod 23 and the engagement of the rod 23 with the locking hole 25a of the stopper 25. That is, the sliding body 24 is usually tilted by the stopper 25 by the locking spring 28,
Although the rod 23 and the stopper 25 are integrated with each other, the rod 23 is fixed to the rod 23. In FIG. 6, the operator rotates the extended end of the stopper 25 with a finger in a direction against the elasticity of the locking spring 28. By doing so, the engagement between the rod 23 and the locking hole 25a of the stopper 25 is released, and the rod 23 and the stopper 25 can move along the rod 23. The sliding body 24 is fixed to the slide plate 3 (FIG. 3). Therefore, by fixing the sliding body 24 at a predetermined position of the rod 23 as described above, the slide plate 3 (the document table 1) and the upper and lower tables 5 are moved through the sliding body 24 and the rod 23. It can be fixed at an arbitrary position relatively.

Next, the opening / closing lock mechanism of the document table unit 35 will be described. FIGS. 7 and 8 show schematic configuration diagrams of the opening / closing lock mechanism. The TPS of this embodiment has a configuration in which the scanner unit 30 is mounted on the document table unit 35 as shown in FIGS. These two units 30 and 35 are connected to each other by a hinge 36 provided on the rear side of the TPS, and have a shell-type opening / closing structure in which the front side of the TPS is opened. The opening / closing lock mechanism of the document table unit in the TPS is disposed at a front part of both units 30 and 35. As described above, the side plate 18 has the fixing pin 19. Also,
As shown in FIG. 7, on the scanner unit 30 side, a shaft 31 is rotatably supported across left and right side plates, and open / close lock claws 32 fixed to both ends of the shaft 31 are provided. It is designed to rotate according to the rotation. Also, near the center of the shaft 31,
The opening / closing lever 33 is fixed.
Is rotated, the opening / closing lock claws 32 are disengaged from the fixing pins 19 on the original table unit 35 side via the shaft 31. A spring 34 is hung on the open / close lever 33, and the spring 34 urges the open / close lever 33 in a direction in which the open / close lock claw 32 is engaged (locked) with the fixing pin 19.
As a result, in the closed state of the scanner unit 30 as shown in FIG. 7, the open / close lock claw 32 engages with the fixing pin 19 and is locked with respect to the document table unit 35. Further, in this closed state, by raising the opening / closing lever 33 against the urging force of the spring 34, the shaft 31 rotates and the fixing pin 19 on the document table unit 35 side is rotated.
Then, the opening / closing lock claws 32 are detached, and as shown in FIG. 8, the scanner unit 30 is opened upward with the hinge 36 as the center of rotation, and the upper portion of the document table unit 35 (document table 1) is opened.

Next, a description will be given of a platen pressure fixing switching device and a platen retracting device according to this embodiment. As described above, the document table 1, which is configured to be vertically movable by the link plate 10 and the link arm 11, is constantly biased by the torsion spring 13. Thus, when the scanner unit 30 is closed with respect to the platen unit 35, the platen 1
Is constantly pressed upward so as to press the document surface of the book document BO placed and spread on the document table 1 against the lower portion of the scanner unit 30. The pressing force on the document surface of the book document BO is normally received by the scanning unit 200 in the scanner unit 30, but in a state where the scanning unit 200 is moved to a position off the book document on the document table 1, The platen 1 and the book document BO are moved to the scanner unit 3
As a result, the scanning unit 200 is prevented from moving smoothly. Therefore, in the present embodiment, with the platen 1 raised to an appropriate position, the platen 1 is fixed, and the platen 1 and the book document BO are moved into the scanner unit 30 due to the raising behavior of the platen 1. It is necessary to prevent extra digging. Further, as described later, when the scanning optical path in the scanning unit 200 is switched to read the original on the contact glass 206 disposed on the upper part of the scanner unit 30, the lower part of the scanning unit 200 and the upper surface of the original table 1 come into contact. The document table 1 needs to be evacuated below the document table unit 35 so that the document table 1 will not be disturbed. The platen pressure fixed switching device and the platen escape device are
FIGS. 9 to 13 show examples of a mechanism for solving these problems, in which a single mechanism is used for both these apparatuses. As shown in FIG. 9, a control wire 40, which is one of the components of this mechanism, has a hook 4 at one end thereof.
1, another hook 42 is fixed to the other end, and a spherical stop ball 45 is fixed near a substantially central portion thereof. The hook 41 is fixed to an outer end portion of the link plate 10 (a side that moves up and down as the document table 1 is raised and lowered).
The control wire 40 extending from the hook 41 is connected to the pulley 4
6, the direction is changed via the pulley 47, and the control pulley 48 is changed.
Is wrapped around. Here, the control wire 40 is, as shown in FIGS.
And a stop ball 45 fixed near the center thereof is fitted in a stop hole 49 of the control pulley 48. Thereby, the movement of the control wire 40 is controlled by the control pulley 48.
Is surely converted to the rotational motion of The control wire 40 wound around the control pulley 48 and extended is always pulled by one end of a tension spring 43 hooked on a hook 42 at one end thereof. The other end of the tension spring 43 is hooked on a hook 44 fixed to the base 6 of the document table unit 35.

The control pulley 48 is, as shown in FIG.
It is supported by a shaft 54 via a one-way clutch 51. The shaft 54 is secured to the slide bearing 52 supported by the pair of side plates 55 at both ends thereof by an E-ring 53.
5 is rotatably supported. As a result, the control pulley 48 moves the shaft 54 toward the arrow a in FIG.
However, in the direction opposite to the arrow a, the one-way clutch 51 cannot rotate relative to the shaft 54.
And rotate together. Therefore, when the shaft 54 is fixed by a mechanism described later, the control pulley 48 can be rotated only in the direction of arrow a in FIG. 9, that is, in the rotation direction when the document table 1 is lowered.

Next, the lowering / fixing operation of the document table 1 by the document table pressure fixing switching device will be described. FIG.
11 to 11, when the shaft 54 is fixed and the platen 1 is pressed down by some external force, for example, the weight of the book document BO or pressurization by a turned page, the platen 1 The hook 41 of the control wire 40 fixed to the alligator loosens the end of the alligator. At the same time, the control pulley 48 is pulled by the tension spring 43, and the hook 41 of the control wire 40 rotates in the direction of arrow a while absorbing the looseness of the arm, and the control wire 40 maintains the initial tension. The hook 44 moves to the side. At this time,
Because the control pulley 48 cannot rotate in the direction opposite to the arrow a due to the action of the one-way clutch 51, even if the lifting force of the document table 1 exceeds the pressing force on the document table 1, The control pulley 48 is not rotated in the direction opposite to the arrow a by the upward force, and the control pulley 48 is stopped while maintaining the position rotated in the direction of the arrow a. In addition, along with the stop of the control pulley 48, the movement of the control wire 40 is also stopped.
The platen 1 descends to a position where it is pushed down by an external force and stops.

Here, the shaft 54 is fixed by a platen elevating mechanism described below. That is, as shown in FIG. 12, a gear 56 is fixed to the shaft 54 so as to rotate integrally with the shaft 54.
Further, as shown in FIG.
Is engaged with another gear 57 rotatably supported by a stud 59 fixed to the gear 57, and the rotation is transmitted to the gear 57. Further, the gear 57 is formed integrally with the worm wheel 58, and the worm wheel 58 is configured to mesh with a worm gear 60 fixed to an output shaft of a document table elevating motor 61. With this configuration, when the platen elevating motor 61 is stopped, the worm wheel 60 cannot rotate due to the engagement between the worm gear 60 and the worm wheel 58, and the gear 5 integrated with the worm wheel 58
The shaft 54 connected via the gear 56 meshing with the shaft 7 is fixed.

Next, the retracting operation of the original table 1 below the original table unit 35 will be described. 12 and 13, when the platen elevating motor 61 is driven so that the gear 56 rotates in the direction of arrow b, the one-way clutch 51
As a result, the control pulley 48 and the shaft 54 rotate integrally, the control pulley 48 rotates in the direction of arrow a in FIG. 9, and the control wire 40 moves the hook 44 sideways. By the movement of the control wire 40, in FIG.
The left and right document tables 1 are lowered, and the upper surface of each document table 1 (the document surface of the book document BO in this embodiment) is moved to the scanning unit 20.
It is evacuated to a position below the document table unit 35, which is separated from 0. This evacuation operation is performed when the power of the apparatus main body is turned on, when the apparatus does not perform reading scanning, and when the
This process is executed when reading a document on the contact glass 206 disposed above the image forming apparatus.

Next, the configuration of the slider in the present embodiment will be described. FIG. 14 is an exploded perspective view of the configuration of the slider. In FIG. 14, a pair of pins 62 serving as a book document thickness detection input unit and a left / right page difference detection input unit of an open book document can be moved in a direction perpendicular to the sliding direction of the pair of racks 63. , Are attached to each rack 63. These pins 62 and rack 6
As shown in FIG. 15, the gears 3 are arranged opposite to each other so as to sandwich the small gear 65a of the two-stage pinion gear 65, and each rack 63 is engaged with the small gear 65a. As a result, in FIG. 15, the pins 62 move toward and away from each other and the pin intervals change, so that the racks 63 move in different directions from each other, and the two-stage pinion gear 65 rotates. Here, each pin 62 can move in the Y direction in FIG. 15 together with each rack 63, and is always symmetrical with respect to the center of the two-stage pinion gear 65 due to the engagement between each rack 63 and the small gear 65a. . In addition, the movement of each pin 62 in the X direction in FIG. 15 is performed by fitting the base of each pin 62 into a restriction groove 83 formed in a cover (not shown).
As shown in FIG. 16, when each pin 62 is separated, it cannot move in the X direction, and when each pin 62 approaches, it is regulated to be movable in the X direction.

Each rack 63 is guided by a pair of guides 84 of the large gear 64 so as to slide on the side surface of the large gear 64 as shown in FIG. FIG. 18 is a cross-sectional view of a connecting portion between the slider 78 and the document table 1. As shown in FIG. 18, a hole is formed in the center of the large gear 64, and a two-stage pinion gear 65 is fitted into the hole from the back side, and a small gear 65 a of the two-stage pinion gear 65 is fitted on the front side. It engages with each rack 63.
Also, as shown in FIGS. 18 and 19, each pin 62
Each of the adjustment studs 4 fixed to the slide plate 3 of each document table 1 is fitted into each of the holes. The gear 64 is shown in FIG.
As shown in FIG. 5, the large gear 64 and the slide output gear 66 are rotatably supported by a support plate 79, respectively. The gear ratio between the large gear 64 and the slide output gear 66 is 2:
It is set to 1.

The large gear 65b of the two-stage pinion gear 65 is
As shown in FIG. 21, the small gear 67 of the pair of two-stage gears 67
a, and their gear ratios are set to 2: 1. The large gear 67b of the two-stage gear 67 meshes with a pair of cam gears 69 via an idle gear 68, respectively. These two-stage pinion gears 65, 2
The step gear 67 and the idle gear 68 are connected to the slide side plate 7.
Each stud (not shown) fixed to 0 is rotatably supported. Also, a pair of cam gears 6
Reference numerals 9 are rotatably supported by support plates 79 (FIG. 20).

As shown in FIG. 22, the slide output gear 66 has an adjusting groove 85 formed from the end of the boss portion to a portion beyond the center. Each cam gear 69 is
As shown in FIGS. 23 and 24, each of them is formed in a cylindrical shape, and one of the openings has a spiral pin moving groove 8 formed therein.
Six perforated surfaces are provided respectively. As shown in FIGS. 23 and 24, the slide output gear 66 is fitted in the cylindrical portion of the cylindrical cam gear 69, and the adjustment groove 85 of the slide gear 66 and the pin moving groove 86 of the cam gear 69 are formed. An output pin 7 to be described later
5 are fitted. The position of the opening formed when the adjustment groove 85 of the slide gear 66 intersects with the pin movement groove 86 of the cam gear 69 changes due to the relative rotation between the cam gear 69 and the slide output gear 66, and in accordance with the change in the opening position. The position of the output pin 75 moves. The movement amount of the output pin 75 is set to move by half of the movement amount of the pin 62. When the cam gear 69 and the slide gear 66 rotate at the same time, the opening makes a circular motion with the distance between the center of both gears and the output pin 75 as a radius. The radius of the circular motion of the opening is set to be の of the radius of the circular motion of the pin 62 when the large gear 64 rotates.

On the other hand, outside the slide side plate 70, FIG.
As shown in FIG. 4, three vertical slide pins 71 are fixed. As shown in FIG. 25, these three vertical slide pins 71 are
a is slidably supported by each of them. Thereby, the slide side plate 70 can be moved in the vertical direction with respect to the horizontal slider plate 72. Further, outside the horizontal slide plate 72, three horizontal slide pins 73 are fixed,
These horizontal slide pins 73 are slidably supported by two horizontally long holes 74a formed in the fixing plate 74 (FIG. 25). Thereby, the horizontal slide plate 72 is
It becomes movable in the left-right direction with respect to the fixed plate 74.

A pair of output pins 75 are shown in FIGS.
As shown in FIG. 7, each of the two vertical guide pins 76 is fixed to each of the pin holders 77. These vertical guide pins 76 are provided with two vertically long holes 74 b formed in the fixing plate 74.
Each output pin 75 extends through two vertical guide holes 74 c formed in the fixing plate 74, and slides through the adjustment groove 85 of the slide gear 66 and the pin of the cam gear 69. The moving grooves 86 are fitted into openings formed by crossing each other. Thus, each pin holder 77 can move up and down with respect to the fixed plate 74, and each output pin 75 can move up and down together with the gear group described above.

The slider 78 configured as described above
Using the pair of pins 62 as an input unit, the thickness of the book document BO and the page difference between the left and right pages when the book is opened are detected, and the reading center of this spread book document (the valley formed at the binding portion of the book document) is always determined. The book document BO can be moved together with the document table 1 using each output pin 75 as an output unit so as to reach a predetermined position on the document table 1.

Next, the movement of the book document and the operation of the slider 78 will be described. As shown in FIG. 27, when the book document BO is spread upward and its page content is read, the surface of the left and right pages of the book document BO (reading surface 8) is read.
In order to make 9) the same plane, cover 90 of book manuscript BO
When a force is applied to the back cover 91 and the back cover 91 from below, the back cover 88 of the book document BO is tilted due to the left and right page difference. As a result, when viewed from the reading surface side of the book document, the reading center S point (valley formed at the binding portion BOa of the book document) of the double-page spread book document is separated from the center P point of the spine 88 by a distance X1 in the horizontal direction. Shift.

By setting the reading range of the scanning unit 200 to a specific range in advance as in this embodiment, the reading control of the scanning unit 200 can be simplified. However, in this way, the scanning unit 2
00 is set to a specific range in advance, the center point of the reading range of the scanning unit 200 is always located at the center P point of the spine 88 of the book document. Document reading center S
If the point is shifted from the center point P of the spine 88, the image read by the scanning unit 200 is shifted by the shift amount (distance X1) of the reading center S point of the spread book original. Therefore, in this embodiment, as a means for correcting the shift amount of the reading center S point of the double-page spread book original, the slider 78 is used to correct the shift direction of the reading center S point of the book original, ie, in the opposite direction. The book original BO is moved together with the original platen 1 by the distance X1 corresponding to the shift amount of the reading center S point in the direction in which the S point and the central P point of the spine 88 match.

In FIG. 27, the inclination of the spine 88 is represented by TH.
1. Assuming that R1 is a half of the total thickness BF of the book original and R1 is X1, and X1 is a horizontal shift amount between the reading center S point of the facing book original and the center P of the spine 88. (R1 / 2) × Sin (2 × TH1). Therefore, the slider 78 detects the thickness R1 of 1/2 of the total thickness BF of the book original and the inclination TH1 of the spine 88, and obtains the reading center S point of the spread book original and the spine 88 by the above equation. Is calculated in the horizontal direction with respect to the center P point, and the shift amount X of the reading center S point is opposite to the direction in which the reading center S point of the book document is shifted.
The reading range of the scanning unit 200 can always be set to a constant range by moving the book document BO by one document table 1, and the reading control of the scanning unit 200 can be simplified.

In the slider 78 according to the present embodiment, FIG.
8 and FIG. 29, the above-described correction of the shift amount X1 of the reading center S point is realized. Here, FIG. 28 shows the positional relationship between the pin 62 and the output pin 75 when the pages of the book document are opened equally to the left and right. FIG.
29, the interval between the two pins 62 supported by the large gear 64 is set to the total thickness BF of the book document BO. That is, the book document BO is transferred to the pair of left and right
When the size stopper 27 is released, the spine 88 of the book document BO is sandwiched by the end of the document table 1 on the center side of the apparatus main body, and the size stopper 27 is stopped. The distance between the centers of the respective adjustment studs 4 fixed to one slide plate 3 becomes just the total thickness BF of the book document BO. Accordingly, the distance R2 between the center of each of the slide output gears 66 and each of the output pins 75 fitted to these slide output gears 66 is determined by the action of the cam gear 69, which will be described later, so that the total thickness BF of the book document BO is increased. 1/4 of
(R2 = R1 / 2). By the way, as described above, the rotation ratio of the large gear 64 and each slide output gear 66 becomes 1: 2 due to the gear ratio, and as shown in FIG. 29, the large gear 64 rotates by the angle of TH1. Then, each slide output gear 66 rotates by twice the angle TH2 of the large gear 64. At this time, the rotation directions of the large gear 64 and each slide output gear 66 are opposite to each other. Therefore, the center of these slide output gears 66 and
The horizontal distance {R2 × Sin (TH2)} between each output pin 75 fitted to these slide output gears 66 is (R1 / 2) × Sin (2 × TH1) of the previous equation, and the spread book document is used. Is the horizontal displacement X1 between the reading center S point of the image and the center P point of the spine 88. Here, the movement of each output pin 75 in the horizontal direction is restricted by the pin holder 77 and the fixing plate 74 as shown in FIG. But with each platen 1 and book manuscript BO,
By the horizontal distance, that is, the shift amount X1, it relatively moves in the direction opposite to the shift direction.

FIG. 30 is a mechanism diagram for explaining the relationship between the amount of movement of each pin 62 and each output pin 75. As shown in FIGS. 18 and 19, each pin 62
Of the respective adjustment studs 4 fixed to the slide plate 3. When one of the pins 62 moves toward the center of the apparatus main body by a distance F, the other pins 62 move toward the center of the apparatus main body by the same distance F by the action of each rack 63 and the two-stage pinion gear 65. At this time, the rotation of the two-stage pinion gear 65 is transmitted to each cam gear 69 by the gear group described above, and each cam gear 69
Are rotated in opposite directions by a rotation angle that is twice the rotation of the two-stage pinion gear 65. Thereby, each cam gear 69
The spiral pin moving groove 86, respectively relative rotation for the adjustment groove 85 of each slide output gear 66 is stopped, a position intersecting with each other in these two grooves, i.e., the position of each output pin 75 , The pin 62 is moved toward the center by an amount equal to の of the moving distance F of the pin 62. Here, the size of each rack 63 and each gear and the spiral shape of each pin moving groove 86 are set so as to satisfy the above conditions.

With these settings, the large gear 64 rotates without changing the interval between the pins 62, and the two-stage pinion gear 6
5 also rotates together, the slide output gear 66 and the cam gear 69 rotate by the same rotation angle in the same direction, so that the pin movement groove 86 of the cam gear 69 and the slide output gear 66 Position of the opening where the adjustment groove 85 intersects with each other, that is, the output pin 7 fitted in this opening.
The position of No. 5 is rotated without moving in the radial direction of the slide output gear 66 (without changing R2), and its set value is always set at the reading center (S point) of the two-page spread book original without shifting during operation. It can be corrected to a fixed position (point P).

The slider 78 in this embodiment is
As shown by a broken line in FIG. 16, in the case of a thin book document in which the interval between the pair of pins 62 is small, the load due to the above-described operation of correcting the reading center (S point) of the spread book document becomes large. The restriction groove 83 of each pin 62 is formed large at the center so that both document tables 1 can freely move up and down without performing a correction operation.

The above-described correction of the reading center (S point) of the two-page spread book original can be realized by a method different from that of the slider 78 described above. For example, a book original BO thickness input device or a detecting device, a platen position detecting device or a spine inclination detecting device, a platen lateral movement driving device (for example, FIG. 3)
As shown in FIG. 1, a feed screw 93, which is horizontally extended along the moving direction of the document table 1, is rotated by a motor 92 with an encoder, and a feed female screw 94 screwed with the feed screw 93 is moved. A deviation amount X1 is calculated based on the above-described calculation formula, and each original platen 1 is moved by this deviation amount X1 to determine each deviation. I just need to cancel it. However, since the slider 78 of the present embodiment does not use an electrical device, the running cost is not required, and a device for correcting the displacement can be provided at a low cost.

[0047]

According to the first aspect of the present invention, the document table is divided into left and right sides, supported by supporting means so as to be able to move left and right, and the supporting means are connected to each other to support the spine of the book document. Therefore, even if the distance between the left and right mounting tables changes, the original document is not loosened, and the gap between the left and right document tables cannot be changed due to the connection member, and the original supporting capacity is maintained. it can. Also, the book document reading and scanning unit is
The center of the length of the scanning range due to the movement of the
And, with respect to the reference position, the left page table and the right page mounting location
Because the tables are regulated so that they are at the same distance from each other, the spine of the book document is located at a fixed position regardless of the type of book document placed, and its reading scan range or page turning scan range is the minimum range. And the whole apparatus can be downsized.

According to the second aspect of the present invention, the mounting table equidistantness regulating means is supported by a gear rotatably supported up and down on the reference position and movably engaged with the gear. Since the first rack and the second rack are supported so as to be able to move while being engaged with the gear on the opposite side of the first rack, the apparatus can be simplified. Further, the first rack and the second rack can be moved in parallel with each other, the right end of the left page placing table and the end of the first rack are rotatably connected to each other, and the left end of the right page placing table and the left end are connected to each other. 2
The ends of the rack are rotatably connected, so that the left and right platens can be at any height from the reference position of the left and right platens, regardless of their height, and the spine of the book document can be fixed. Position, the reading scanning range or the page turning scanning range falls within the minimum range, and the entire apparatus can be miniaturized.
According to the third and fourth aspects of the present invention, the spread binding portion of the book document is at a fixed position regardless of which thickness of the book document is placed and which page is opened. The range or page-turning scanning range falls within the minimum range (twice the page), and the entire apparatus can be miniaturized. According to the invention of claim 5, the input detection position of the book document thickness detecting means,
The output table drive position of the document table interval variable means for changing the distance between the opposite sides of the left and right document tables, the input detection position of the left and right document table height difference detection means, and the document table for moving the left and right document tables simultaneously to the left and right output base drive position of the moving means, so disposed after the previous right platen facing portion of, it is possible to prevent erroneous input detection of the document table by the longitudinal inclination and the like, also, the moving distance by the driving cantilevered It is possible to suppress the occurrence of errors and deviations and malfunctions such as stop and lock due to an increase in load. According to the invention of claim 6, the input detection position of the book document thickness detecting means and the interval between the opposite sides of the left and right document tables are set.
The output table drive position of the document table interval varying means to be changed, the input detection position of the left and right document table height difference detection means, and the output table drive position of the document table moving means for simultaneously moving the left and right document tables to the left and right are Before and after the opposite part of the platen
Concentrate, and the input and output are opposed to the left and right platen
I concentrate on the input and output parts provided before and after the part
In, its configuration is simple, it can reduce the overall size of the device.
According to the seventh aspect of the present invention, the first gear that rotates according to the size of the interval between the two right and left document tables and the rotation angle that is twice the first gear in conjunction with the first gear. a pair of second gears that only the reverse direction rotation to the gear side spiral grooves in carved, and the first gear in accordance with the height difference of the two original table a left and right
And body rotation, the same third gear rotation axis with the first gear, in conjunction with the third gear, third gear to double rotating the rotational angle but only reverse gear Has one straight groove radially carved from the center on the side surface, while rotating with the second gear
A pair of fourth gears having the same center axis are provided, and the entire left and right document tables are moved so that the intersection of the spiral groove and the linear groove always keeps a fixed position with respect to the entire apparatus. Since the platen moving means is provided, it is possible to reduce the size and weight of a device for holding the spread binding portion (a boundary between the right page and the left page) of a book document spread and placed on the platen at a fixed position. As a result, the cost can be kept low, and an inexpensive device can be provided to the market. In addition, with the above-described configuration, in order to control the behavior of the original according to the thickness of the original, the interval between the left and right originals is set differently, and the thickness of the original and the two originals are set. When the front and back covers of the book manuscript and the two left and right manuscript tables are operated integrally with each other by matching the intervals of the book manuscript, no matter how thick the book manuscript is, Even when a document is set, an accurate platen movement amount can be determined. Furthermore, since the platen moving means is realized only by mechanical components, there is no need for electrical control, and control programs for the apparatus main body or peripheral devices such as a printer and a storage device can be simplified. Cost and development time can be reduced. Also, no matter where the opened pages of the set original are,
The amount of movement of the platen can be determined based on the height difference between the two right and left platens caused by leveling the reading surface, and the spread binding portion of the book document can be held at a fixed position.
According to the eighth aspect of the present invention, the first gear that rotates according to the size of the interval between the two right and left document tables, and the rotation angle that is twice as large as the first gear in conjunction with the first gear. a pair of second gears that only the reverse direction rotation to the gear side spiral grooves in carved, and the first gear in accordance with the height difference of the two original table a left and right
And body rotation, the same third gear rotation axis with the first gear, in conjunction with the third gear, third gear to double rotating the rotational angle but only reverse gear Has one straight groove radially carved from the center on the side surface, while rotating with the second gear
A pair of fourth gears having the same center axis are provided, and the entire left and right document tables are moved so that the intersection of the spiral groove and the linear groove always keeps a fixed position with respect to the entire apparatus. In the configuration in which the platen moving means is provided, the rotation centers of the first gear and the third gear are configured to be the same, so that the input point of the distance between the two right and left platens and the left and right The input point of the height difference between the two platens can be the same,
A small and lightweight device can be used to hold a double-page spread portion (a boundary between a right page and a left page) of a book document spread and placed on a platen at a fixed position. As a result, the cost can be kept low, and an inexpensive device can be provided to the market. Also,
An input point for the size of the space between the two document tables on the left and right;
The input points of the height difference between the left and right platens are
Since it is possible to concentrate on the opposing portion of one platen, the apparatus can be simplified, the production cost can be reduced, and the development time can be reduced. According to the ninth aspect of the present invention, the first gear that rotates according to the size of the interval between the two right and left document tables, and the rotation angle that is twice as large as the first gear in conjunction with the first gear. Is
One of only a reverse in rotation to the gear side spiral groove on carved
A second gear pair, depending on the height difference between the two platen right
It rotates integrally with the first gear, and the first gear and the rotation center axis are the same.
And one third gear, in conjunction with the third gear, the third
It has a single linear grooves carved in the radial direction from the center portion to twice the only reverse's rotation angle gear side to rotation of the gear, second
And a pair of fourth gears having the same rotation center axis , and the right and left document tables are arranged such that the intersection of the spiral groove and the linear groove always maintains a constant position with respect to the entire apparatus. Since a platen moving means for moving the entire platen is provided, and a part of the third gear constitutes a rotation axis of the first gear, the input of the size of the distance between the two right and left platens is input. When the point and the input point of the height difference between the two document tables on the left and right are set to be the same, the first gear and the third gear can be superimposed, and are placed on the document table while being spread open. A small and lightweight device can be used to hold a double-page spread portion (boundary between the right and left pages) of a book document at a fixed position. As a result, the number of components can be reduced, the cost can be reduced, and an inexpensive device can be provided to the market. Also, the input point having the size of the interval between the two right and left document tables and the input point having a height difference between the two right and left document tables can be concentrated on the opposing portions of the two right and left document tables. Can be simplified, and production costs and development time can be reduced. This is because a part of the third gear is configured as a rotation shaft of the first gear, thereby making the rotation axes the same and enabling different rotations. The fact that the gap between the gear and the third gear was suppressed to about 0.5 mm was an important point in miniaturizing the apparatus. According to the tenth aspect of the present invention, the first gear that rotates according to the size of the interval between the two right and left document tables and the rotation angle that is twice as large as the first gear in conjunction with the first gear. a pair of second gears spiral grooved gear side of rotating only in the opposite direction it,
One gear and one gear according to the height difference between the two document tables
And body rotation, the same third gear rotation axis with the first gear, in conjunction with the third gear, third gear to double rotating the rotational angle but only reverse gear Has one straight groove radially carved from the center on the side surface, while rotating with the second gear
A pair of fourth gears having the same center axis are provided, and the entire left and right document tables are moved so that the intersection of the spiral groove and the linear groove always keeps a fixed position with respect to the entire apparatus. In the configuration in which the platen moving means is disposed, two racks that move in accordance with the interval between the two right and left platens and transmit rotation to the first gear are disposed on the side surface of the third gear. The two racks as input points of the size of the interval between the two document tables on the left and right sides can reliably slide on a plane, and a guide for smoothing the movement of the rack is provided on the third gear. It is possible to further reduce parts and reduce the size. In addition, the input point having the size of the interval between the two right and left platens and the input point having a height difference between the two right and left platens can be functioned on the same rack. A small and lightweight device can be used to hold the spread binding portion (the boundary between the right page and the left page) of the book document thus placed at a fixed position. As a result, the number of components can be reduced, the cost can be reduced, and an inexpensive device can be provided to the market. Also, the input point having the size of the interval between the two right and left document tables and the input point having the height difference between the two right and left document tables can be concentrated on the opposing portions of the two right and left document tables. The equipment can be simplified, the production cost can be reduced, and the development time can be reduced. According to the eleventh aspect of the present invention, the first gear that rotates in accordance with the size of the interval between the two document tables on the left and right, and interlocking with the first gear ,
A pair of second gears spiral grooved gear side of rotation twice the only backward but the rotation angle of the first gear, left and right
Rotates in unison with the first gear according to the height difference between the two platens ,
A first third gear and the rotation center axis of the same gear, in conjunction with the third gear, only the reverse's third twice the rotation angle of the gear
Has a single linear grooves carved in the radial direction from the center portion to the gear side of the rotating direction, the rotation center axis identical to the second gear
Platen moving means for moving the entire left and right platen so that the point at which the spiral groove and the linear groove intersect always keeps a fixed position with respect to the entire apparatus. The two racks that move in accordance with the distance between the two right and left document tables and transmit the rotation to the first gear,
A fifth gear disposed on the side surface of the third gear and meshing with the rack so as to rotate in accordance with the amount of movement of the two racks; The fifth gear arranged on the same side as the first gear is integrally formed with the first gear arranged on the opposite side of the third gear, so that the distance between the two document tables on the left and right sides is equal to that of the fifth gear. The rotation angle (the rotation angle of the fifth gear) based on the movement amount of the two racks as an input can be separated from the rotation of the two racks as the input of the height difference between the two right and left document tables. It is possible to create an innovative device that derives two control factors from the point (rack), that is, “the size of the interval between the two right and left document tables” and “the height difference between the two right and left document tables”. The rotation of the fifth gear is controlled by the first gear.
The gear can be transmitted to the opposite side of the third gear, and the device can be made compact without interfering with the movement of the rack at the input point. Further, the input point having the size of the interval between the two document tables on the left and right and the input point having a height difference between the two document tables on the left and right are made to function on the same rack, so that the input table is spread on the document table. A small and lightweight device can be used to hold the spread binding portion (boundary between the right and left pages) of the placed book document at a fixed position. As a result, the cost can be kept low, and an inexpensive device can be provided to the market. Also, the input point having the size of the interval between the two right and left document tables and the input point having a height difference between the two right and left document tables can be concentrated on the opposing portions of the two right and left document tables. Can be simplified, and production costs and development time can be reduced. According to the invention of claim 12, in conjunction with the first gear that rotates in accordance with the magnitude of the two left and right platen interval, to the first gear, first
And one of the second gear pair of the gear side of the rotating angle of rotation but only reverse the spiral grooves carved twice gear, first in accordance with the height difference between the two platen right Rotates together with the gear,
A third gear having the same rotation center axis as the first gear;
In conjunction with the gear, twice the rotation angle but only the reverse side of the third gear
Has a single linear grooves carved in the radial direction from the center portion to the gear side surfaces toward twice rotation, the rotation center axis identical with the second gear
A platen moving means which includes a pair of fourth gears and moves the entire left and right platen so that the intersection of the spiral groove and the linear groove always keeps a fixed position with respect to the entire apparatus; in configuration which is disposed, by a change of the two platen of the height difference between the left and right, simultaneously when the third gear is rotated, the first gear is first
3 of the gear and the same direction of rotation, and so is configured so as to equal only rotation but the rotation angle, the third gear is rotated occurs a change in the height difference between the two platen left, meshed When the fourth gear rotates, the first gear rotates exactly the same as the third gear, so that the second gear also rotates exactly the same as the fourth gear. Then, even if the height difference between the right and left document tables changes, no relative rotation occurs between the second gear and the fourth gear, and the point where the spiral groove and the linear groove intersect is formed. Rotate simultaneously with respect to the rotation centers of the second gear and the fourth gear without changing their distances. This makes it possible to control the movement amounts of the two document tables on the left and right only by the amount of change in the height difference between the two document tables on the left and right. In other words, disturbance can be suppressed, and accurate document table movement control can be performed. Since these are realized by a simple combination of gears,
A small and lightweight device can be used to hold a double-page spread portion (a boundary between a right page and a left page) of a book document spread and placed on a platen at a fixed position. As a result, the cost can be kept low, and an inexpensive device can be provided to the market. According to the thirteenth aspect of the present invention, the first gear that rotates according to the size of the interval between the two right and left document tables and the rotation angle twice as large as the first gear in conjunction with the first gear a pair of second gears spiral grooved gear side of rotating only in the opposite direction it,
Turns together with the first gear according to the height difference between the two document tables
A third gear having the same rotation center axis as the first gear;
In conjunction with the third gear, a third single linear grooves carved in the radial direction from the center portion to twice the only reverse's rotation angle <br/> the gear side of rotation of the gear Yes, and the rotation center shaft and a second gear
Is provided with the same pair of fourth gears, and the original for moving the entire left and right original tables so that the intersection of the spiral groove and the linear groove always keeps a constant position with respect to the entire apparatus. When there is no height difference between the two document tables on the left and right sides in the configuration in which the table moving means is provided, the intersection of the spiral groove and the straight groove is the true position of the second gear and the fourth gear. Since there is no height difference between the two right and left platens, that is, when the right and left pages of the book placed and opened on the platen are equal, the platen is moved. The control amount becomes “0” (zero), the reference position can be made coincident with the center of the document table in the maximum movement range, and the document table movement control width can be minimized. As a result, it is possible to reduce the size and weight of the apparatus for holding the double-sheet binding portion (the boundary between the right page and the left page) of the book document placed and spread on the document table at a fixed position. As a result, the cost can be kept low, and an inexpensive device can be provided to the market. According to the invention of claim 14, in conjunction with the first gear that rotates in accordance with the magnitude of the two left and right platen interval, to the first gear, the first
Second gear and the first gear in accordance with the height difference between the two platen left and right pair of double rotation angle but only reverse the rotation to gear side spiral grooves in carved gear Rotates together with the first
A third gear gear and the rotation center axis of the same, in conjunction with the third gear, third twice only backward but the rotation angle of the gear
One from the center to the gear side of twice the rolling has a single linear grooves carved in the radial direction, the rotation center axis and the second gear is identical
; And a fourth gear pairs, so as to maintain a constant position always for the entire intersection point of the device with the spiral grooves and the linear grooves, the platen moving means for moving the entire platen of the left and right In the arrangement, the spiral groove and the straight groove intersect with each other.
The pins that fit into the holes
Cannot move in the direction of contact and separation, and
Since form freely movable structure vertically Te, for holding spread binding portion of the original placed it is wide open on the platen (the boundary between the right page and the left page) at a fixed position, the left and right It is possible to detect only the horizontal distance at the point where the rotation center of the second gear and the fourth gear intersects the spiral groove and the straight groove, which is the amount of movement of the document table. Further, by fitting a pin into a hole formed by intersecting the spiral groove and the straight groove, no matter what rotational movement the second gear and the fourth gear make, Regardless of the relative rotation angle, it is possible to always follow the hole formed by the crossing of the spiral groove and the linear groove, and to ensure accurate document table movement control.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing the overall configuration of an apparatus main body in the TPS.

FIG. 2 is a schematic side view of a document table unit in the TPS.

FIG. 3 is a schematic plan view of a book document mounting table in the TPS.

FIG. 4 is a schematic plan view of a document table unit in the TPS.

FIG. 5 is a schematic perspective view of a size stopper that positions the left and right document tables in the document table unit according to a book document size.

FIG. 6 is a schematic plan view of the size stopper.

FIG. 7 is a schematic perspective view of a unit opening / closing lock mechanism for opening / closing a scanner unit with respect to the platen unit of the TPS.

FIG. 8 is a schematic side view of the unit opening / closing lock mechanism.

FIG. 9 is a schematic perspective view of a platen pressure fixing switching device in the platen unit.

FIG. 10 is a schematic sectional view of the platen pressure fixing switching device.

FIG. 11 is a perspective view of one component of the platen pressure fixing switching device.

FIG. 12 is a schematic perspective view of a drive unit of the platen pressure fixing switching device.

FIG. 13 is a schematic plan view of the platen pressure fixing switching device.

FIG. 14 is an exploded perspective view showing the configuration of a slider for detecting the thickness of a book document placed on the document table and the page difference between left and right opened pages.

FIG. 15 is a schematic perspective view showing a configuration of a pin and a rack of a detection input unit in the slider.

FIG. 16 is an explanatory diagram for driving pins of a detection input section in the slider.

FIG. 17 is a schematic perspective view showing a positional relationship between the rack and the large gear in the slider.

FIG. 18 is a schematic sectional view showing a configuration of a pin and a rack of a detection input unit in the slider.

FIG. 19 is a schematic side view showing a positional relationship between the pins and racks and the left and right document tables in the slider.

FIG. 20 is a schematic side view showing a positional relationship between a large gear and a slide output gear in the slider.

FIG. 21 is a schematic side view showing a positional relationship between a two-stage pinion gear and a cam gear in the slider.

FIG. 22 is a schematic perspective view showing a positional relationship between a large gear and a slide output gear in the slider.

FIG. 23 is a schematic plan view showing a positional relationship among a slide output gear, a cam gear, and an output pin in the slider.

FIG. 24 is a schematic perspective view showing a positional relationship among a slide output gear, a cam gear, and an output pin in the slider.

FIG. 25 is a schematic side view showing a mounting position of a horizontal slide plate to a slide side plate in the slider.

FIG. 26 is a schematic side view showing a mounting position of a horizontal slide plate and a pin holder with respect to a fixed plate in the slider.

FIG. 27 is a schematic side view of a binding section of a book document set on the document table.

FIG. 28 is a schematic side view showing the positional relationship among the pins of the slider, the large gear, the slide output gear, and the output pin when the spine of the book document set on the document table is horizontal.

FIG. 29 is a schematic side view showing a positional relationship among pins of the slider, a large gear, a slide output gear, and an output pin when a spine of a book document set on the document table is inclined.

FIG. 30 is a schematic side view showing a configuration of an operation transmission mechanism between a detection input unit and an output unit of the slider.

FIG. 31 is a schematic perspective view showing another moving means of the platen.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 document table 4 adjustment stud 5 vertical table 6 base 7 a, 7 b, 8, 9, 16 angle 10 link plate 11 link arm 12 stud 13 torsion spring 14 back support plate 17 extension spring 30 scanner unit 35 document table unit 40 wire 41, 42,44 Hook 43 Tension spring 45 Stop ball 46,47 Pulley 48 Control pulley 49 Stop hole 50 Groove 51 One-way clutch 52 Slide bearing 56,57 Gear 58 Worm wheel 60 Worm gear 61 Platen lift motor 62 Pin 63 Rack 64 Large gear 65 two-stage pinion gear 66 slide output gear 67 two-stage gear 68 idle gear 69 cam gear 70 slide side plate 71 vertical slide pin 72 horizontal slider plate 73 horizontal slide pin 74 fixing plate 75 output pin 76 vertical guide Down 77 pin holder 78 slider 79 support plate 83 defining grooves 85 adjusting groove 86 pin moving groove 200 binding portion of the scanning unit BO book document BOa book original

Claims (14)

(57) [Claims] 1. A book document whose reading range is set in advance.
Reading of the probe click document by the reading scanning unit, or, with respect to the lower surface of the unit for performing page turning to face the document surface of the book document, the document table of the book document for placing the book original there are a right page table for placing the right page of the book originals wide open, a left page table for placing the left page of the book originals wide open, the left page table right Left mounting table support means for movably supporting the right page mounting table , right mounting table support means for supporting the right page mounting table movably in the right and left direction, and the left mounting table support arranged in parallel on the left and right. Mounting means configured to urge the means and the right mounting table support means in the upward direction; and a book spread and mounted on the upper surfaces of the left page mounting table and the right page mounting table . The spread left of the manuscript The vertical page surface and page surface regulating means for regulating on the same plane, the scanning by the movement of the book document reading scanning unit
A center of the length of the range is set as a reference position, and a mounting table equidistance regulating means for controlling the left page mounting table and the right page mounting table to be equidistant from each other with respect to the reference position. A platen for book documents, characterized in that: 2. The original platen for a book original according to claim 1, wherein said placing plate equidistant regulating means is movable with a gear rotatably supported up and down on said reference position while meshing with said gear. , And a second rack supported so as to be able to move while meshing with the gear on the opposite side of the first rack. The first rack and the second rack are The right end of the left page placing table and the end of the first rack are rotatably coupled to each other, and the left end of the right page placing table and the end of the second rack are rotatably coupled to each other. A platen for book documents, characterized in that: 3. A book document platen on which the book document is placed with the document surface of the book document facing a lower surface of a unit for reading or turning a book document. A right page mounting table for mounting the right page of the opened book, a left page mounting table for mounting the left page of the opened book, and the left side arranged in parallel on the left and right. Page mounting table and right side page
Mounting table connecting means for connecting the opposite sides of the mounting table to each other; and supporting the left page mounting table and the right page mounting table independently so as to be movable in the left-right direction, and attaching each of them upward. The placing table urging support means configured to urge the book document placed and opened on the upper surface of the left page placing table and the right page placing table , and the left and right opened page surfaces of the book document are placed in the same vertical direction. A page surface regulating means for regulating on the surface, a mounting table difference detecting means for detecting a height difference between the left page mounting table and the right page mounting table, and an output from the mounting table difference detecting means, the left page mounting table and <br/> A binding section indexing means for determining a position of a binding section of a book document placed open on the upper surface of the right page placing table, and a binding section of the book document indexed by the binding section indexing means. The position is always set to a predetermined To match the position, the left page table and the right page placement location
A platen for book documents, comprising: a table moving means for moving the table in the left-right direction. 4. A book document platen for mounting the book document with the document surface of the book document facing a lower surface of a unit for reading or turning pages of the book document. A right page mounting table for mounting the right page of the opened book, a left page mounting table for mounting the left page of the opened book, and the left side arranged in parallel on the left and right. A mounting table connecting means for connecting the opposing sides of the page mounting table and the right page mounting table, and supporting the left page mounting table and the right page mounting table independently movably in the left-right direction, And a loading table biasing support means configured to bias each of them upward, and a spread of a book document spread and placed on the upper surfaces of the left page loading table and the right page loading table . The vertical direction of the left and right pages A page surface regulating means for regulating on the surface, and the left page table and the right page table is another, pairs
Mounting table end inclination detecting means for detecting the inclination of an imaginary straight line connecting the opposite sides, and from the output of the mounting table end inclination detecting means, the upper surface of the left page mounting table and the upper side of the right page mounting table A binding section indexing means for determining the position of the binding section of the book document placed and spread; and to match, the left page table and the right page placement location
A platen for book documents, comprising: a table moving means for moving the table in the left-right direction. 5. A book document platen for mounting the book document with the document surface of the book document facing the lower surface of a unit for reading or turning a book document. The platen is divided into two right and left platens, and the right and left platens are configured to be movable toward and away from each other, and a book document for detecting the thickness of a book placed on the platen is detected. a thickness detecting means, in accordance with the thickness of the book document placed on said document platen, book document alignment for changing between <br/> interval of said left right original manuscript stand opposite side of An apparatus and a left and right original table height difference detecting means for detecting the height difference between the left and right original tables, and an original table position for simultaneously moving the left and right original tables to the left and right according to the height difference between the left and right original tables. Adjusting device and book manuscript platen An input detecting position of the book document thickness detecting means, an output table driving position of the document table interval changing means for changing the distance between the opposite sides of the left and right document tables, and an input detecting position of the left and right document table height difference detecting means. And the output table drive position of the document table moving means for simultaneously moving the left and right document tables to the left and right,
Platen of a book document, characterized in that provided after the previous left right platen portion facing. 6. A book document platen for mounting the book document with the document surface of the book document facing a lower surface of a unit for reading or turning a book document. The platen is divided into two right and left platens, and the left and right platens are configured to be movable toward and away from each other. A book original position adjusting device having a thickness detecting means, and changing a distance between opposite sides of the left and right original tables in accordance with a thickness of a book original placed on the original table; A right and left platen height detecting means for detecting a height difference between the left and right platens, and a platen position adjusting device for simultaneously moving the left and right platens to the left and right according to the height difference between the left and right platens. On the platen of the book original, Input sensing the position of the click original thickness detecting means, output base drive position of the platen interval changing means for changing the spacing of the left and right platen opposite side of the input sensing the position of the left and right platen elevation difference detecting means, and, The output table driving positions of the document table moving means for simultaneously moving the left and right document tables to the left and right are concentrated before and after the opposing portions of the left and right document tables , respectively, and
The input and output before and after the opposing part, respectively.
A platen for book documents, wherein the platen is concentrated on the input / output unit provided . 7. A book platen for mounting the book document with the book document surface facing the lower surface of a unit for reading or turning a book document. The platen is divided into two platelets on the left and right sides, and the entire platen on the left and right sides is freely movable in the left-right direction. A first gear that rotates with the first gear and a first gear
Twice and a pair of second gears spiral grooves in it rotation angle only reverse the gear side of rotation is carved, and the first gear in accordance with the height difference of the two left and right platen of Rotate together, the first
A third gear gear and the rotation center axis of the same, in conjunction with the third gear, to twice the rotational angle but only reverse third gear
Has a single linear grooves carved in the radial direction from the center portion to the gear side of rotation, a pair rotation center axis identical with the second gear
Fourth; and a gear, as the point of intersection of the upper Symbol spiral groove and said linear groove is kept a fixed position at all times for the entire apparatus, a document table for moving the entire document table of the left and right A platen for book documents, wherein a moving means is provided. 8. A platen for a book document according to claim 7.
A first plate and a third gear having the same rotation center. 9. The book plate according to claim 7, wherein :
And a part of the third gear constitutes a rotating shaft of the first gear. 10. The book document according to claim 7, wherein:
And two racks, which move in accordance with the distance between the two right and left document tables and transmit rotation to the first gear, are disposed on the side surface of the third gear. Platen. 11. A book plate according to claim 10, wherein:
Oite, a fifth gear meshing with each other and the rack to rotate in response to movement of the upper Symbol two racks,
The fifth gear provided on the same side as the rack with respect to the third gear is integrally formed with the first gear provided on the opposite side of the third gear. The platen for the book manuscript. 12. The book plate according to claim 7, wherein:
There are, by changes in the two platen of the height difference between the upper Symbol left, at the same time when the third gear is rotated, the first gear 3
To the gear and the same rotation direction, and the document table of the book document, characterized in that the only rotation's the same rotation angle. 13. The book document according to claim 7, wherein:
There are, at the time of the two platen state without difference in height of the upper Symbol left and right, the point of intersection with the spiral groove and the straight groove,
A platen for a book document, which is located immediately above or below said second gear and said fourth gear. 14. The book document according to claim 7, wherein:
The spiral groove and the straight groove intersect with each other.
Pins that fit into the holes
It is not possible to move in the direction of movement of the platen and the direction of movement
It can be freely moved in the vertical direction with respect to
The platen of the book manuscript to be taken.