JPS60176030A - Method and device for obtaining image on surface of book - Google Patents

Abstract

PURPOSE:To copy clearly the vicinity of a seam, too, by inserting a transparent original image correcting member having a high refractive index, which conforms to a roughly triangle pole-shaped gas generated in the vicinity of the seam when a thick book is opened, between a platen glass and the book. CONSTITUTION:The desired page of a thick book 1 is opened and placed on a base 4B supported elastically by a spring 4A in a physical handler frame 4. In such a case, a transparent prism 3B of a high refractive index, having a size conforming to a roughly triangle pole-shaped gap generated in the vicinity of a seam is inserted as an original image correcting member, and pressed together with the book 1 by a platen glass 2. One side of the platen glass 2 is a hinge mechanism, and it is executed easily to take in and out the book and to select a necessary page. By an exposing lamp 5, an original is irradiated from the upper side, the reflected light is processed by a well-known method, and copying is executed. In such a way, a heavy book is handled easily, and an original of the vicinity of a seam is also copied clearly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application) The present invention relates to a method and apparatus for imaging the surface of a book, and particularly to a thick book surface (manuscript surface of a book, literature, notebook, material, etc.) Copy it with an electronic photocopier, or
The present invention also relates to a method and apparatus for obtaining an image of the surface of a book, which is suitable for improving the image quality of the image near the binding part of the book when sending it by facsimile.

<Prior Art> A conventional book copying method will be briefly described below with reference to the drawings.

1 and 2 are schematic diagrams showing a conventional book copying method using electrophotographic copying. In each figure, the platen glass 2 is shown partially broken, and furthermore, FIG. 1 shows a case where a thin book 1 is placed on the platen glass 2, and FIG. Thick ff1f on glass 2! 11 is shown.

In the conventional book copying method, as is well known, the book is placed on a platen glass with the copy side facing downward.

Therefore, if the book 1 placed on the platen glass 2 is thin, as shown in FIG. Since the entire m8'S surface of the book 1 and the platen glass 2 can be easily brought into close contact,
A good copy can be obtained.

However, if the book 1 is thick as shown in FIG.
Alternatively, if the spine 1B is hard, the document surface 1C near the binding portion and the two platen glasses cannot be brought into close contact.

For this reason, the image on the recording paper on the document surface 1C near the binding section may be blurred or distorted, or in even more severe cases, the image may not appear at all.

Therefore, in this case, the spine 1B of the book 1 and its vicinity are pushed in the direction of the arrow to eliminate the above-mentioned drawback.

However, if the spine 1B is pressed too hard, the spine 1B and/or the binding portion 1Δ may be damaged, and the book 1 may be damaged.

Further, if the book 1 is particularly thick, even if the spine 1B is strongly pressed as described above, the document surface 1C near the binding portion (=J) cannot be brought into close contact with the platen glass 2.

In this case, it is not possible to eliminate the defect of image defects on the document surface 1C near the binding section, and especially when the image of the document surface 1C near the binding section is not displayed, the document surface of the book cannot be solved. means that it cannot be copied.

Furthermore, when obtaining an image of the surface of a book using conventional electrophotographic copying machines, facsimile machines, etc., first the desired manuscript surface of the book is detected, and then the book is placed face down on a platen glass. However, if the book is heavy, the above-mentioned operation of turning the book over is very inconvenient for the user of the electrophotographic copying machine, facsimile machine, etc.

In particular, those in charge of photocopying in libraries and reference rooms should
! The work involved in turning the ball is physically tiring, and sometimes even causes fasciitis in the upper limbs.

(Objective) The present invention has been made in order to eliminate the above-mentioned drawbacks, and its object is to obtain an image of a particularly thick book surface without damaging the book. It is an object of the present invention to provide a method and apparatus for obtaining an image of a book surface by improving image resolution and always obtaining a good original image.

(Summary) In order to achieve the above object, the present invention provides a transparent original image correction material having a higher refractive index than air in the gap formed between the platen glass and the original surface near the binding part of the book. It is distinctive in the way the body is arranged.

(Misaki example) − 1, the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a schematic diagram showing the basic configuration of the present invention. In the figures, the same reference numerals as in FIGS. 1 and 2 refer to the same or equivalent parts.

In FIG. 3, the manuscript surface 1C near the binding part of the book 1,
A document image correction body 3A is arranged in a space formed between the platen glass 2 and the document image correction body 3A.

The document image correction body 3A is transparent and made of a material having a higher refractive index than air.

Therefore, the apparent position of the image corresponding to the document surface 1C in the vicinity of the binding section is determined depending on the refractive index of the document image corrector 3A. be brought closer.

In general electrophotographic copying machines, facsimile machines, etc.
In other words, the imaging lens system for projecting the original image onto the photoreceptor has a slight depth of focus (depth of field) from the contact surface between the platen glass 2 and the original surface to the original side. For example, the copying apparatus is configured such that a good, well-focused copy image can be obtained even if the image position moves slightly away from the contact surface toward the document side.

Therefore, the apparent image position on the document surface 1C near the binding section, which is highlighted due to the difference between the refractive index of air and the refractive index of the document image corrector 3A, is made to fall within the range of the depth of focus described above. By determining the size, shape, and refractive index of the original image corrector 3A, good copies can be obtained without applying excessive force to the spine 1B of the book 1.

In FIG. 3, the document image correction body 3A has an isosceles triangular cross section, but the cross section is not limited to this, and the corners may be chamfered or
It may be formed into a curved surface that fits the roundness of the book surface.

Further, the original image correcting body 3A is not limited to a solid material, and may be a transparent and flexible bag-shaped mat filled with a transparent liquid having a high refractive index.

In this case, when placing the book 1 on the platen glass 2, if the document image correction body 3A is placed between the book 1 and the platen glass 2, the document image correction body 3A can be inserted. The body 3A includes the document surface 1C near the binding section and the platen glass 2.
It can be freely deformed depending on the space formed between the two.

FIG. 4 is a schematic diagram showing an embodiment in which the present invention is applied to an electrophotographic copying machine. In the figure, the same reference numerals as in FIG. 3 represent the same or equivalent parts.

In FIG. 4, the book handler frame 4 is a box-shaped container for storing books with only the top open. A platen glass 2 supported by a fixed frame 2A is inserted into the upper surface of the book handler frame 4.

Although not shown in the figure, one side of the fixed frame 2A is rotatably fixed to the book handler frame 4 by appropriate means, making it easy to load and unload the SII. It is now possible to do so.

In the book handler frame 4, a spine support stand 4c for supporting the spine cover 1B of the book 1 and an Im support stand 4B for supporting the cover of the book 1 are arranged.

The spine support stand 4C is configured so that its height can be adjusted according to the thickness of the book M1.

The inner box support stand 4B is supported by a spring 4A protruding from the bottom surface of the book handler frame 4, and pushes up the document surface of the book 1, thereby making it possible to bring the document surface into good contact with the platen glass 2. It is grooved to allow for

A document image corrector (hereinafter referred to as a prism 3B) is detachably attached to the platen glass 2. Therefore, when copying a thin book 1, the prism 3B can be removed.

As mentioned above, when placing the book 1 into the book handler frame 4, it is done by listening to the platen glass 2, but after loading the book 1, the platen glass 2 is closed and the book handler frame 4 is placed. By pushing the frame 4 into a predetermined document position within a space provided within the electrophotographic copying machine, the document surface of the book 1 that is in close contact with the platen glass 2 can be exposed.

An exposure lamp 5, a reflector 6, a scanning mirror 7, a pair of movable mirrors 8, a lens 9, and a fixed mirror 1o are arranged above the book handler frame 4 housed in the electrophotographic copying machine.

The exposure lamp 5, the reflector 6, the scanning mirror 7, and the moving mirror 8 perform generally known operations, thereby achieving a document surface of mN1. The reflected light travels in the direction of arrow B and reaches the photosensitive drum 11.

The photosensitive drum 11 rotates in the direction of arrow Ch in synchronization with the movements of the exposure lamp 5, reflector 6, and scanning mirror 7.

As is well known, a charging corotron 12, a developing device 13, a transfer device 14, a cleaning device 15, a paper conveyance device 16, and the like are arranged around the outer periphery of the photosensitive drum 11.

By driving the paper conveying device 16, recording paper (not shown) is conveyed in the direction of the arrow.

The original image of the book 1 is formed on the recording paper by driving other devices.

Now, as is clear from the following section 2-31, in this embodiment, the book 1 is arranged so that the original surface of the book 1 faces upward.

In other words, since the image of the book 1 can be obtained with the book 1 open, the burden on the user is small, and it is especially convenient when obtaining images of multiple different pages from the same book in small numbers. be.

Moreover, this also makes it possible to shorten the time required to obtain an original image. Furthermore, since the position of the original with respect to the platen glass can be easily known, the deviation of the original image formed on the recording paper can be minimized.

FIG. 5 is a schematic perspective view showing an example of the shape of the prism 313 shown in FIG.

As described above, the prism 3B has an isosceles triangular cross section and is made of a transparent material having a high refractive index such as glass or plastic.

The cross-sectional shape is determined by the refractive index of the material forming the prism 3B or the size of the book from which the original image is to be obtained.

The present inventor has discovered that the material forming the prism 3B is as follows:
An experiment to find the optimal cross-sectional shape using glass, plastic, etc., and assuming that the book from which the manuscript image is obtained is a general book stored in a general library, reference room, etc. I did it repeatedly.

The cross-sectional shape is an isosceles triangle, and the IO angle θ
is 1'2O-1-5 (degrees), and the height H is 20-3 degrees (mm
), it was found that good copies of books of various thicknesses could be obtained without damaging the books.

1. The means for removably fixing the prism 3B to the platen glass 2 is not shown in FIG. 5, but since it can be easily implemented using known techniques, its explanation will be omitted.

It goes without saying that the present invention is not limited to application to electrophotographic copying machines, facsimile machines, etc. in which originals face upward as shown in FIG. 4, but can also be applied to conventional apparatuses in which originals face downward.

(Effects) As is clear from the above description, according to the present invention, the following effects are achieved.

(1) Since the document image corrector is placed between the platen glass and the document surface near the closing part of the document, when obtaining an image of the thick book surface, it is possible to obtain an image of the thick book surface without damaging the book. Distortion, blur, etc. of the original image can be reduced.

('2J) When the configuration is such that an image of the book can be obtained while the book is facing upward, there is no need to turn the book over, which reduces the time it takes to obtain an image of the original and also puts a physical burden on the user. Further, it is possible to obtain an original image at an accurate position on the recording paper.

[Brief explanation of drawings]

Figure 1 shows a conventional book copying method when a thin book is placed on a platen glass, Figure 2 shows a conventional book copying method when a thick book is placed on a platen glass, and Figure 3 shows a conventional book copying method when a thick book is placed on a platen glass. FIG. 4 is a schematic diagram showing an embodiment of the present invention applied to an electrophotographic copying machine. FIG. 5 is a schematic perspective view showing an example of the prism in FIG. 4. It is a diagram. 1...Book, 1A...Binding part, 1B...Spine cover,
1C...Document surface near binding section A1, 2...Platen glass, 3A...Document image corrector, 3B...Prism,
4...Boot handler frame, 5...Exposure lamp, 9...Lens, 11...Photosensitive drum Patent attorney Michito Hiraki Other 1 each library 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] (1) A method for obtaining an image of a book surface using an electrophotographic copying machine, a facsimile machine, etc., which exposes the document surface of a book to light with a platen glass in close contact with the document surface of the book, the method comprising: A book characterized in that a transparent document image corrector having a high refractive index is arranged to fill the gap (J is J) in the gap formed near the binding part of the book between the platen glass and the book. A method for obtaining an image of the surface of a book. a transparent document image corrector having a high refractive index and having a substantially isosceles triangular cross section and disposed at a position that substantially fills a gap formed near the binding portion of the book between the platen glass; and means for fixing the document image corrector to the platen glass. (3) The device is configured to fix the document image corrector to the platen glass. A device for obtaining a patented image, characterized in that it is removably fixed to a platen glass. (4) An angle formed by mutually equal sides of the original image correction body is in a range of (120±5) degrees. An apparatus for obtaining an image of a book surface according to claim 1, 2, or 3. (5) The document image correction body is formed of glass. The apparatus for obtaining an image of a book surface according to any one of claims 2 to 4. (6) Claim 2, wherein the document image correction body is molded from plastic. A device for obtaining an image of a book surface according to any one of items 1 to 4.