JPS60168131A - Copying machine - Google Patents

Abstract

PURPOSE:To execute correctly copying to the vicinity of a binding part, too, by opening a bound original book in about a V-shape toward the upper part, and providing a platen glass whose at least one page side is transparent and whose section is in about a V-shape, for pressing its right and left pages from the upper part. CONSTITUTION:In a copying machine, this platen 1 having a V-shaped section opened toward the upper part is placed symmetrically with regard to a vertical surface, and moved up and down between an exposing position shown by a full line and a set position shown by a virtual line in the figure, by an automatic lifting device provided with a driving means of a manual lifting device. An original book 2 is placed on this platen 1, this platen 1 is lifted up to the exposing position and copying pages 3a, 3b are made to adhere tightly to a platen glass 4. When illuminating light sources 5, 5 are lighted, and the copying pages 3a, 3b are scanned by a scanning mirror 6 by moving the first mirror carriage 7 in the horizontal direction, a reflected image of the copying pages 3a, 3b are formed and exposed on the peripheral surface of an electrified photosensitive body 13 by an image forming lens 11.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application) The present invention relates to a copying machine that uses a rotating drum-shaped photoreceptor and a scanning exposure system, and more particularly, to a copying machine that uses a rotating drum-like photoreceptor and a scanning exposure system.
This relates to a copying machine that can be photographed.

(Prior Art) Copying machines have been provided in the past, but one of the most common features of conventional copying machines is a scanning mirror that is moved substantially horizontally to scan the optical surface of the document, and a scanning mirror that scans the optical surface of the document. Two light path length adjustment mirrors arranged to change the traveling direction of the light reflected from the scanning mirror by 180 degrees and moved in a direction parallel to the direction in front of the feet, and light from the optical path length adjustment mirrors. an exposure optical system consisting of an imaging lens into which the image is incident, and a rotating drum-shaped photoreceptor on which an original image is recorded on the circumferential surface by the imaging lens; It is known that it is placed parallel to the When using this type of copying machine to copy the pages of a bound book, turn the book face up to open the page to be copied, then turn the book over and place this page on the platen glass. That's what I was doing. However, this method, especially when the number of pages to be covered is large, requires the work of turning the book over and over again and again, which is extremely inefficient and increases the fatigue of the labor department. Further, if the book is thick and heavy, when the book is placed upside down on a platen glass, the weight of the book is applied to the binding, which tends to damage the binding. In addition, especially when the book is thick, the pages near the binding part are thick (curved and do not cover the platen glass closely), and this part often becomes distorted or cannot be copied.

(Purpose of the Invention) The present invention has been made in view of the above-mentioned circumstances, and provides a method for copying pages of a bound book efficiently (and correctly copying the vicinity of the binding area) and without damaging the book. The purpose is to provide opportunities.

(Effects of the Invention) The copying machine of the present invention is a copying machine having an exposure optical system and a rotating drum-like photoreceptor as described above, in which a bound original book is opened upward in a substantially V-shape and the original book is centered. A book mounting table that supports the line in a state perpendicular to the scanning direction, and a book mounting table that presses from above the open left and right pages of yA misfortune placed on this book mounting table, and at least one page side is transparent. and a platen glass having a cross-sectional path of a character-shaped cross section, and assuming that the moving speed of the scanning mirror is V, and the inclination of the platen glass with respect to the moving direction of the scanning mirror is α, the circumferential speed of the drum-shaped photoreceptor is Compression of the copied image is prevented, and the moving speed v2 of the scanning mirror is set so that the scanning direction is tan α) toward the center line of the original book, and the scanning direction is away from the center line of the original book. The feature is that the distance between the two is kept constant.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

FIG. 1 shows a copying machine according to an embodiment of the present invention. The book mounting table 1, which has a substantially V-shaped cross-sectional shape that opens upward, is arranged symmetrically with respect to the vertical plane, and is moved by an automatic lifting device equipped with a driving means or a manual lifting device, as indicated by the solid line in the figure. It is designed to be moved up and down between the happy position and the set position shown by the imaginary line. The original book 2 to be copied is placed on the book holder 1 at the set position with the copy pages ja and 3b opened. When placed on the book placing table 1, the original book 2 opens upward in a substantially V-shape, and the vicinity of the binding portion does not curve significantly.

A transparent platen glass 4 having a V-shaped cross section is arranged at a position that comes into close contact with the copy pages 3a and 3b when the book mounting table 1 is raised to the exposure position. The platen glass 4 is arranged symmetrically with respect to a vertical plane, and the left and right sides are each inclined by an angle α with respect to the horizontal plane. Above the platen glass 4, an illumination light source 5,
5 and a scanning mirror 6, which is moved in the horizontal direction; and two optical path length adjustment mirrors 8 and 9 which change the traveling direction of the light reflected from the scanning mirror 6 by 180 degrees. A second mirror carriage 10 which is moved in the horizontal direction is arranged. The light from the optical path length adjustment mirror 9 passes through the IM lens 11, is changed direction by the mirror 12, and reaches the circumferential surface of the electrophotographic photoreceptor 130 in the form of a rotating drum. Each element from the illumination light sources 5, 5 to the photoreceptor 13 explained above is such that the moving speed v2 of the second mirror carriage 10 and the circumferential speed vl of the photoreceptor 130 are different from each other, as will be described later.
) is formed in the same manner as that used in a conventional general electronic copying machine, except that it is specially set for the moving speed [v].

As described above, the original book 2 is placed on the book placing table 1, and the book placing table 1 is raised to the exposure position and the subject page 3 is placed on the book placing table 1.
When the copy pages 3a and 3b are housed in the platen glass 4, the copy pages 3a and 3b are pressed down from above by the platen glass 4 and become flat (at this time, of course, the copy pages 3a and 3b are (The central line of the original book 2 is perpendicular to the direction of movement of the mirror carriage 7.) Therefore, the illumination light sources 5, 5 are turned on in the same manner as in the conventional copying machine, and the first mirror carriage 7 is moved in the horizontal direction to scan the object pages 3a, 3b by the scanning mirror 6.
The reflected image 3b is formed on the circumferential surface of the charged photoreceptor 130 by the imaging V lens 11 and exposed to light. The electrostatic latent images of the copy pages 3a, 3b formed on the circumferential surface of the photoreceptor 13 by this exposure are developed into toner images, and the toner images are transferred onto transfer paper to obtain copies of the copy pages 3a, 3b. .

The charging means, the developing means, the transfer means, the transfer paper feeding means, the static eliminating means, the cleaning means, etc. are known ones or can be used as they are, so illustrations and explanations are omitted.

When the copying on the copying pages 3a and 3b is completed as described above, the book placing table 1 is lowered to the setting position, and while the original book 2 is placed on the book placing table 1, the page is turned over and a new copy is made. You can open the subject page and then copy this new subject page in the same manner as described above.

Next, the peripheral speed v1 of the photoreceptor 130 and the moving speed v2 of the second mirror carriage 10, that is, the optical path length adjusting mirrors 8 and 9 in this copying machine will be explained. If you don't understand the explanation, please go from point A on the copying page 3b to the center C of the original book 2 to point B (A) on the copying page 3a, as shown in FIG.
Assume that scanning is performed up to C=13C=b). At this time, the horizontal distance (distance in the scanning direction) between point A and point B is 2a, the middle point of this horizontal section is 0, and the distance between this 0 point and the above point C) Q
h, the time required for scanning from point A to point B is t, and the moving speed of the first mirror carriage 7 is V.

If the circumferential surface moves by 2b, the copying page 3a.

A copy of the same size as 3b is obtained. Once determined,
Even though the copy pages 3a and 3b are scanned diagonally, normal copies that are not compressed can be obtained.

Next, when scanning from point A to point C, assuming that the second mirror carriage 10 is stopped, the optical path length from the copying page 3b to the optical path length adjusting mirror 8 is a −h
will be shortened only.

-8 and 9 in the same direction as the scanning mirror 6. The second mirror carriage 10 may be moved in the same direction as the first mirror carriage 7 with the optical path from the photo page 3b to the imaging lens 11. Isn't it practical? a (h that is α
>45° (v2 takes a negative value), the second mirror carriage 10 is moved in the opposite direction to the first mirror carriage 7. Further, when a = h, that is, α=45°, V2 == Q, that is, the second mirror carriage 10 may be stopped.

When scanning from point 0 to point B, the optical path length can be kept constant by moving the second mirror in the same direction as the second mirror carriage 7 at the moving speed.

When scanning continuously from point A to point B, the rectangular eclipse device or 0
If it passes the point, there must be a second mirror. In order to increase the moving speed of the second mirror carriage 10 in this way, the second mirror carriage 10 is driven by a variable speed motor such as a step motor, and the first mirror carriage 7 is driven by a variable speed motor such as a step motor.
The passage of the zero point may be detected from the zero position signal, and the speed of the variable speed motor may be increased based on this detection signal, or the speed may be increased mechanically using a link mechanism.

When the inclination α of the platen glass 4 is made variable, it is necessary to make the peripheral speed v1 of the photoreceptor 13 and the moving speed WVz of the second mirror carriage 10 variable. A variable speed motor is used as the carriage drive means, and v1+v2 is determined by the value of α above.
It's good to have control over it. Such "control" can be performed to a high degree using a microprocessor, and in this case there is also the advantage that the control device can be formed compactly.

In the above embodiment, both open pages 3a and 3b of the original book 2 are copied at the same time, but the apparatus may be configured to copy only one page. Even when copying only one page in this way, the optical path length adjusting mirror must be moved depending on whether the set exposure for exposure is performed toward the center line of the original book or away from the center line of the original book. The speed v2 may be set by changing it as described above. Note that when the device is configured to copy only one page, the platen glass that holds the page that is not copied may be opaque or may be formed from an opaque material other than glass (in the present invention, (This type of glass is also referred to as a "platen glass.")

In addition, if the right and left parts of the book mounting table 1 are made to be slidable relative to each other in the vertical direction (vertical direction) via elastic members such as springs, the number of pages on the right side of the opened manuscript book 2 can be adjusted. Even when the number of pages on the left side and the number of pages on the left side are significantly different (i.e., when the pages are opened near the beginning or the end), it is possible to correctly bring each copy page 3a, 3b into close contact with the platen glass 4. It is preferable.

It should be noted that the copying machine of the present invention is also capable of copying a cut original by setting it on a book holder.

(Effects of the Invention) As explained above in detail, the copying machine of the present invention performs exposure with the original book facing upward and opened in a V-shape, so that the vicinity of the binding part of the page does not curve significantly, and therefore, this The area around the binding area can be copied well without damaging the book. In addition, since it is possible to turn the pages while the original book is placed face up on the book holder, the page turning task is much easier and more efficient than before, especially when there are many pages to be copied. The burden on people will be significantly reduced.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention, and FIG. 2 is a diagram illustrating the relationship between the circumferential speed of the photoreceptor, the moving speed of the optical path length adjusting distortion mirror, and the moving speed of the scanning mirror in the present invention. It is an explanatory diagram. 1...Book mounting stand 2...Manuscript Books 3a, 3b.
...Ball photo page 4...Platen glass 6...Scanning mirror 8.9...Optical path length adjustment mirror 11...Imaging lens 13...Rotating drum-shaped photoreceptor α...Platen glass Inclination Y...Movement speed of the first mirror carriage (of the scanning mirror) v1...Peripheral speed of the photoreceptor ■2...Movement speed of the second mirror carriage (of the optical path length adjustment mirror) L...Center of the original book Line 111 Figure 2

Claims (1)

[Claims] The distance between a scanning mirror that is moved approximately horizontally to scan the surface of the document and the direction of light reflected from this scanning mirror is 1.
It consists of two optical path length adjustment mirrors arranged to change by 80 degrees and moved in a direction parallel to the scanning direction, and an imaging lens into which light from the optical path length adjustment mirrors is incident. In a copying machine having an exposure optical system and a rotating drum in which a document image is formed on the circumferential surface by the quadrature lens, a bound document book is opened upward in a substantially V-shape. A book mounting table that supports the original book in a state where the center line is perpendicular to the scanning direction, and a book mounting table that holds the open left and right pages of the original book placed on the book mounting table from above, and at least one page side is A transparent platen glass with a cross section of
When the moving speed of the iE mirror is V, and the inclination of the platen glass with respect to the moving direction of the scanning mirror is α, the circumferential speed of the drum-shaped sensitive element Vl, the moving speed v2 of the mirror, and the scanning speed within the original book ( 1-ta11α A copying machine characterized in that scanning is set away from the center line of the original book.