JPH03287246A - Xeroraphic copying machine - Google Patents

Abstract

PURPOSE:To prevent the damage of an original for copying and to reduce its distortion by providing an original placing plate whose central part is recessed, and an original platen which is located on the upper part of the original placing plate, bent, and can vertically move. CONSTITUTION:This electrophotographic copying machine is provided with the original placing plate 4 which is arranged so as to slide in a vertical direction on the top surface of a substrate 3, and forms a placing surface 4a whose central cross section is an almost V-shape having an obtuse angle, a transparent glass original platen 13 which is mounted on a movable part 6, and has a shape that planes whose cross section are the V-shape in two directions corresponding to the placing surface 4a of the original placing plate 4 and a scanning means 14 which travels on the original platen 13 and exposes and scans the original such as a book positioned at the lower surface of the original platen 13. When the book to be copied is placed on the original placing plate 4, it is opened to a prescribed obtuse angle. When an operating switch is turned on, the original platen 13 is lowered and presses this page surface with proper pressure. In this state, the scanning means 14 exposes and scans the top surface of the original platen along it, and the original is copied. Thus, the damage of the book when the copying is carried out is prevented, and further, a sharp and excellent copying image is obtained.

Description

[Detailed description of the invention] ′-[Industrial application field] The present invention relates to an electronic copying machine.

[Conventional technology]

Generally, in an electronic copying machine, an image reading section and an image writing section are disposed below a document table made of transparent glass on which a document is placed.

That is, an image scanner that includes a bar-shaped light source that illuminates the original and an image sensor that receives light information reflected from the original is installed below the original plate, and this image scanner scans the lower surface of the original plate. , the side of the document placed face down that is to be copied is exposed to light. The obtained optical information is first converted into an electrical signal and subjected to image processing, and then projected onto a rotating photoreceptor drum as optical information and copied.

By the way, when copying thick books, etc. with such an electronic copying machine, open the page you want to copy, turn it upside down, press that side against the document table, cover the document cover, and then make copies. Ta.

[Problem to be solved by the invention]

However, in such electronic copying machines, books, etc. are pressed against a flat manuscript table, so the binding part at the center of the book is easily damaged, and if the books, etc. are thick,
Because the central binding part does not come into close contact with the document table, there are problems in that part cannot be copied clearly or the image is distorted and difficult to see.

Also, since the edges of each page of an open book will be uneven,
There was also the problem that black lines at the edges of each page appeared on the copied paper, making the copied paper dirty and difficult to see.

In view of these problems, an object of the present invention is to provide an electronic copying machine that does not damage books, etc. when copying books, etc., and can obtain clear and clean copied images. do.

[Means to solve the problem]

An electronic copying machine according to the present invention includes a document placing table having a concave central portion, and a transparent plate located above the document placing table, which is bent according to the surface shape of the document placing table, and is movable in the vertical direction. It is equipped with a document table and a scanning means for exposing and scanning the upper surface of the document table.

[For production]

If you place a book on the manuscript table with the page to be copied facing up, it will open at a predetermined obtuse angle, and when you turn on the activation switch, the manuscript table will lower and press this page with appropriate pressure. In this state, the scanning means exposes and scans the upper surface of the document table along the document table, thereby copying the document.

〔Example〕

A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

In Fig. 1, 1 is the electronic copying machine main body, 2 is this main body 1
This is a sub-copying section that is electrically connected to the copying section for copying books and the like.

In the subcopying section 2, 3 is a fixedly arranged base;
Reference numeral 5 indicates a document mounting table which is arranged to be slidable in the vertical direction on the upper surface of the base 3 and forms a mounting surface 4a having a substantially V-shaped cross section with an obtuse angle at the center; Mounting table 4
These springs are arranged in a compressed state between the back surface of the document plate 4 and support the document mounting table 4. For example, when an open book B is placed facing upward on the mounting surface 4a, The height of the page to be copied is adjusted by sliding the document table 4 in the vertical direction according to the weight.

Reference numeral 6 denotes a movable part that can move up and down guided by a column 7 supported by the base 3; 8 a standing wall that stands up from the base 3 and is supported on the back side of the movable part 6 (see FIG. 2); 9 is a wire hung in a figure 8 shape on four pulleys 9a pivotally connected to the upright wall 8; 10.10 is a pair of parallel elongated holes in the upright wall 8 that stand up from the back side of the movable part 6; 8a,
a support piece 1 that passes through 8a and is fixed to the wire 9;
A drive motor 1 is connected to one of the pulleys 9a and can move the movable part 6 up and down via the pulley 9a and the wire 9.

Reference numeral 13 denotes a transparent glass original plate attached to the movable part 6 and has a V-shaped cross section and a combined shape of planes in two directions corresponding to the placing surface 4a of the original placing table 4 (see FIG. 3); 14 is a document plate; A scanning means that travels on a table 13 to expose and scan a document such as a book located on the lower surface of the document table 13, and this means 14
15 is an image scanner that extends in a direction perpendicular to the traveling direction and has a built-in light source (not shown) and an image sensor that receives reflected light from the document; 16 and 17 are connected to the image scanner 15 by four pulleys 16a and 17a, respectively; A pair of driving wires are stretched in a V-shaped loop in the scanning direction, and each end of the image scanner 15 is fixed to the driving wires, and the drive wires are arranged so as to sandwich the document table 13. 18 and 19 are respectively supported by the movable part 6 on the outside of the drive wires 16 and 17, and each pulley 16a, 1
7a and supports the common support shaft of the image scanner 15.
A guide plate provided with guide grooves 18a and 19a whose respective ends slide into each other; 20 is a pulley 16a provided at the end;
A scan motor is connected to the common support shaft 21 of 17a via a belt 21a and is used to cause the image scanner 15 to scan via a drive wire 16. A home position sensor 23 is located on the valley line, which is the lowest part of the document table 13, and is connected to the image scanner 1.
The changeover switch 23' detects the scan end position of 5, and is the same changeover switch as the changeover switch 23 located on the right end of the document table 13, and the image scanner 15 scans up to each changeover switch 23 and 23'. This makes it possible to copy one page of each book B placed on the document table 4, and when the changeover switch 23' detects the image scanner 15, the image scanner 15
is returned to the starting position. When the set number of sheets (number of sheets) is reached, the same process is performed by the changeover switch 23. Further, the image scanner 15 may be configured to be detected only by the changeover switch 23', so that two pages can be copied at one time.

Reference numeral 25 denotes a page turning section disposed in the movable section 6, and in particular, in this page turning section 25 shown in FIG.
A guide plate 26 is fixedly held above the document table 13 in the movable part 6, and a pair of pins 27a, 27a are fitted into the guide plate 26, and a guide groove 26a,
26a in the longitudinal direction, that is, the image scanner 1
The guide frame 28, which is slidable in the running direction of 5, has an upper end pivotally connected to a support shaft 27b on the lower surface of the guide frame 27, and has a bent portion 28.
This is an arm portion that holds a page turning roller (to be described later) via a, and is normally held in a state where it is rotated to a position where it does not come into contact with the document table 13 by an elastic member (not shown). 29 is a pair of Nofu! j-30a,
30a is a wire that is hung between the wires and the guide frame 27 is fixed; 31 is a roller feed motor to which a pinion that meshes with a gear integrated with one pulley 30a is connected; 32 is a wire at the lower end of the arm 28; A page turning roller made of rubber, for example, is rotatably supported, 33 is a page turning motor that rotates the roller 32 via a belt, 34 is held between the roller 32 and the motor 33, and its free end is used to turn the page. The page stopper 35 that forms the hook piece 34a that hooks the surface is a solenoid that is fixed to the lower surface of the guide frame 27 and has an arm 35a connected to the arm part 28, and is a solenoid that is fixed to the lower surface of the guide frame 27 and has an arm 35a connected to the arm 28. By applying electricity to the arm portion 28 in the position, the arm 35a is attracted and the arm portion 28 is moved to the vertical position, that is, the book B
It can be rotated upwards. Therefore, the roller 32 is moved forward and backward relative to the book B (in a direction perpendicular to the longitudinal direction of the guide plate 26) by turning the solenoid 35 ON and OFF. Moreover, when the document table 13 is lowered and presses the surface of the page to be copied in the book B, the arm 28 is in an inclined position away from the page surface b1, and the document table 13 is raised and the page surface of the book B to be copied is pressed down. In the state away from the page surface b1, the arm 28 can be rotated to a vertical position where the roller 32 presses against the page surface b1 of the book B (see FIG. 5).

In the figure, a cover covering the sub-copying section 2, such as the movable section 6 and the upright wall 8, is omitted.

This embodiment is constructed as described above, and its operation will be explained next.

First, before use, the document table 13. The movable part 6 including the scanning means 14 and the page turning part 25 is in the raised position.

In this state, book B with the page to be copied facing up.
When the book B is placed on the placement surface 4a of the document placement table 4, the book B is opened and held in a V-shape with a predetermined obtuse angle. Therefore, even if there are many pages, there are few curved portions in the central binding area, and The discrepancy between this page and other pages is also small. Further, since the document platform 4 is supported by the springs 5, 5, when the book B has many pages and is heavy, the document platform 4 is relatively lowered, and when the book B has a small number of pages and is small in weight, the document platform 4 is lowered. In this case, the amount of descent of the document table 4 is small, and the position of the opened page surface is adjusted appropriately.

Then, when an operation switch (not shown) is turned on, the movable part 6 is lowered by the drive motor 11, and the document table 13 presses the open page surface of the book B with a suitable arm (see FIG. 1). At this time, the image scanner 15 is
It is located at the upper start position of 3, and the page turning section 25
In this case, the arm portion 28 is held in an inclined position at the left end of the guide plate 26.

Then, the scan motor 2o operates, and the common support shaft 21
．． Drive wire 16. via pulleys 16a, 17a.
17 operate at the same time, the image scanner 15 scans along the document table 13 in conjunction, the built-in light source exposes the document surface, and the reflected light is read by the image sensor.
Copied.

In this manner, when the image scanner 15 is detected by the switching sensor 23 at a position where one page has been exposed and scanned, the image scanner 15 stops and copies one page. Then, the image scanner 15 further scans in the same direction, and when it is detected by another switching sensor 23' at the position where the remaining one page has been exposed and scanned,
Also, one sheet of copying is completed and the scanning operation is completed, and at the same time the scan motor 20 is reversed and the image scanner 1
5 is returned to the starting position detected by the home position sensor 22. When copying two pages at the same time, the image scanner 1 is operated only by the switching sensor 23'.
5 will be detected.

When the scanning operation is completed, the drive motor 11 is reversed and the movable part 6 is raised. Then, in the page turning section 25 shown in FIGS. 4 and 5, the roller feed motor 31 is driven, the wire 29 is activated, and the guide frame 27 and arm section 28 are moved from the left end in the figure to the right rotation, and solenoid 35
As a result, the arm portion 28 rotates around the support shaft 27b of the guide frame 27 from an inclined position on the outside of the document table 13 to a vertical position in the direction of the document table 13 (direction perpendicular to the plane of the paper in FIG. 4). do. The motor 31 stops at a predetermined position (
5), the lower portion of the bent portion 28a of the arm portion 28 enters inside the document table 13 which is in the raised position, and the page turning roller 32 is in a state where it presses the edge of the book B.

Alternatively, the solenoid 35 may be activated after the roller feed motor 31 has finished driving.

At this position, the page turning motor 33 rotates to the right for a predetermined period of time, so that the page turning roller 32 rounds the top page b1 into an arc shape as shown in FIG. By moving the section 28 to the left in FIG. 4, the end of the page b1 is hooked onto the hook 34a. Then, by further rotating the roller feed motor 31 in this state, the arm portion 28 is moved to the fourth position.
The page is moved horizontally to the left end position in the figure, the page stopper 34 turns the page b1 to the left, and the solenoid 35 is turned off.
At least the arm portion 28 returns to its initial position, thereby completing the page turning operation.

Then, the movable part 6 is lowered again and a scanning operation is performed.

In addition, if an operation section is provided in part of the electronic copying machine main body 1 or the sub-copying section 2, and the number of pages to be copied is specified and inputted in advance, the copying machine will automatically stop after copying a predetermined number of pages, resulting in efficient operation. It is.

As described above, according to this embodiment, when copying book B, book B is opened upward and placed at a predetermined angle, so there is no risk of damaging book B. Since most of the center bound portion of the page is also pressed against the original platen 13 and becomes flat, the copied image of this portion is also clear and has little distortion. Furthermore, there is little misalignment between the edges of the book and the pages below, and there are fewer black lines or stains on the copied image.

In the above-described embodiment, the page turning unit 25 is provided so that pages can be turned automatically. However, this may be omitted, and the movable unit 2 including the page turning document table 13 can be raised to manually turn the page. You may also do so. Even in this case, there is no need to turn over or move the book B each time, so there is no risk of damaging the book B, and the pages can be easily turned over.

2. In the above-described embodiment, the sub-copying section 2 is configured separately from the copying machine main body 1, but it may be constructed as a unit and incorporated into the copying machine main body.

〔Effect of the invention〕

As described above, the electronic copying machine according to the present invention is equipped with a document table having a concave central portion and a document table that is bent and movable up and down and located above the document table. In this case, there is no risk of damaging the manuscript such as a book, and it has an important practical advantage of being able to obtain a clear copy image with little distortion.

[Brief explanation of the drawing]

The attached drawings show one embodiment of the present invention, and FIG. 1 is an explanatory diagram showing the scanning state of the sub-copying section, FIG. 2 is a perspective view of the main part showing the driving part of the movable part, and FIG. FIG. 4 is an explanatory diagram showing a page turning operation, and FIG. 5 is a perspective view of essential parts showing a page turning section. 4...Original placement table, 4a...Placement surface, 13...
. . . Original table, 14. . . Scanning means, 15. . . Image scanner. 1P5 figure

Claims (1)

[Claims] a document tray whose center portion is recessed from both sides; a transparent document tray positioned above the document tray and bent according to the surface shape of the document tray and movable in the vertical direction; An electronic copying machine comprising a scanning means for scanning the top surface of the table for exposure.